From eeadcb75794516839078c28b3730132aeb700ce6 Mon Sep 17 00:00:00 2001 From: Anna Schumaker Date: Tue, 13 Sep 2022 14:01:51 -0400 Subject: [PATCH 01/49] NFSD: Simplify READ_PLUS Chuck had suggested reverting READ_PLUS so it returns a single DATA segment covering the requested read range. This prepares the server for a future "sparse read" function so support can easily be added without needing to rip out the old READ_PLUS code at the same time. Signed-off-by: Anna Schumaker Signed-off-by: Chuck Lever --- fs/nfsd/nfs4xdr.c | 139 +++++++++++----------------------------------- 1 file changed, 32 insertions(+), 107 deletions(-) diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index bcfeb1a922c0d..1e4990fb16922 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -4767,79 +4767,37 @@ nfsd4_encode_offload_status(struct nfsd4_compoundres *resp, __be32 nfserr, static __be32 nfsd4_encode_read_plus_data(struct nfsd4_compoundres *resp, - struct nfsd4_read *read, - unsigned long *maxcount, u32 *eof, - loff_t *pos) + struct nfsd4_read *read) { - struct xdr_stream *xdr = resp->xdr; + bool splice_ok = test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags); struct file *file = read->rd_nf->nf_file; - int starting_len = xdr->buf->len; - loff_t hole_pos; - __be32 nfserr; - __be32 *p, tmp; - __be64 tmp64; - - hole_pos = pos ? *pos : vfs_llseek(file, read->rd_offset, SEEK_HOLE); - if (hole_pos > read->rd_offset) - *maxcount = min_t(unsigned long, *maxcount, hole_pos - read->rd_offset); - *maxcount = min_t(unsigned long, *maxcount, (xdr->buf->buflen - xdr->buf->len)); + struct xdr_stream *xdr = resp->xdr; + unsigned long maxcount; + __be32 nfserr, *p; /* Content type, offset, byte count */ p = xdr_reserve_space(xdr, 4 + 8 + 4); if (!p) - return nfserr_resource; + return nfserr_io; + if (resp->xdr->buf->page_len && splice_ok) { + WARN_ON_ONCE(splice_ok); + return nfserr_serverfault; + } - read->rd_vlen = xdr_reserve_space_vec(xdr, resp->rqstp->rq_vec, *maxcount); - if (read->rd_vlen < 0) - return nfserr_resource; + maxcount = min_t(unsigned long, read->rd_length, + (xdr->buf->buflen - xdr->buf->len)); - nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset, - resp->rqstp->rq_vec, read->rd_vlen, maxcount, eof); + if (file->f_op->splice_read && splice_ok) + nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount); + else + nfserr = nfsd4_encode_readv(resp, read, file, maxcount); if (nfserr) return nfserr; - xdr_truncate_encode(xdr, starting_len + 16 + xdr_align_size(*maxcount)); - - tmp = htonl(NFS4_CONTENT_DATA); - write_bytes_to_xdr_buf(xdr->buf, starting_len, &tmp, 4); - tmp64 = cpu_to_be64(read->rd_offset); - write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp64, 8); - tmp = htonl(*maxcount); - write_bytes_to_xdr_buf(xdr->buf, starting_len + 12, &tmp, 4); - - tmp = xdr_zero; - write_bytes_to_xdr_buf(xdr->buf, starting_len + 16 + *maxcount, &tmp, - xdr_pad_size(*maxcount)); - return nfs_ok; -} - -static __be32 -nfsd4_encode_read_plus_hole(struct nfsd4_compoundres *resp, - struct nfsd4_read *read, - unsigned long *maxcount, u32 *eof) -{ - struct file *file = read->rd_nf->nf_file; - loff_t data_pos = vfs_llseek(file, read->rd_offset, SEEK_DATA); - loff_t f_size = i_size_read(file_inode(file)); - unsigned long count; - __be32 *p; - - if (data_pos == -ENXIO) - data_pos = f_size; - else if (data_pos <= read->rd_offset || (data_pos < f_size && data_pos % PAGE_SIZE)) - return nfsd4_encode_read_plus_data(resp, read, maxcount, eof, &f_size); - count = data_pos - read->rd_offset; - /* Content type, offset, byte count */ - p = xdr_reserve_space(resp->xdr, 4 + 8 + 8); - if (!p) - return nfserr_resource; - - *p++ = htonl(NFS4_CONTENT_HOLE); + *p++ = cpu_to_be32(NFS4_CONTENT_DATA); p = xdr_encode_hyper(p, read->rd_offset); - p = xdr_encode_hyper(p, count); + *p = cpu_to_be32(read->rd_length); - *eof = (read->rd_offset + count) >= f_size; - *maxcount = min_t(unsigned long, count, *maxcount); return nfs_ok; } @@ -4847,69 +4805,36 @@ static __be32 nfsd4_encode_read_plus(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_read *read) { - unsigned long maxcount, count; + struct file *file = read->rd_nf->nf_file; struct xdr_stream *xdr = resp->xdr; - struct file *file; int starting_len = xdr->buf->len; - int last_segment = xdr->buf->len; - int segments = 0; - __be32 *p, tmp; - bool is_data; - loff_t pos; - u32 eof; + u32 segments = 0; + __be32 *p; if (nfserr) return nfserr; - file = read->rd_nf->nf_file; /* eof flag, segment count */ p = xdr_reserve_space(xdr, 4 + 4); if (!p) - return nfserr_resource; + return nfserr_io; xdr_commit_encode(xdr); - maxcount = min_t(unsigned long, read->rd_length, - (xdr->buf->buflen - xdr->buf->len)); - count = maxcount; - - eof = read->rd_offset >= i_size_read(file_inode(file)); - if (eof) + read->rd_eof = read->rd_offset >= i_size_read(file_inode(file)); + if (read->rd_eof) goto out; - pos = vfs_llseek(file, read->rd_offset, SEEK_HOLE); - is_data = pos > read->rd_offset; - - while (count > 0 && !eof) { - maxcount = count; - if (is_data) - nfserr = nfsd4_encode_read_plus_data(resp, read, &maxcount, &eof, - segments == 0 ? &pos : NULL); - else - nfserr = nfsd4_encode_read_plus_hole(resp, read, &maxcount, &eof); - if (nfserr) - goto out; - count -= maxcount; - read->rd_offset += maxcount; - is_data = !is_data; - last_segment = xdr->buf->len; - segments++; - } - -out: - if (nfserr && segments == 0) + nfserr = nfsd4_encode_read_plus_data(resp, read); + if (nfserr) { xdr_truncate_encode(xdr, starting_len); - else { - if (nfserr) { - xdr_truncate_encode(xdr, last_segment); - nfserr = nfs_ok; - eof = 0; - } - tmp = htonl(eof); - write_bytes_to_xdr_buf(xdr->buf, starting_len, &tmp, 4); - tmp = htonl(segments); - write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4); + return nfserr; } + segments++; + +out: + p = xdr_encode_bool(p, read->rd_eof); + *p = cpu_to_be32(segments); return nfserr; } From 69eed23baf877bbb1f14d7f4df54f89807c9ee2a Mon Sep 17 00:00:00 2001 From: Colin Ian King Date: Mon, 10 Oct 2022 21:24:23 +0100 Subject: [PATCH 02/49] NFSD: Remove redundant assignment to variable host_err Variable host_err is assigned a value that is never read, it is being re-assigned a value in every different execution path in the following switch statement. The assignment is redundant and can be removed. Cleans up clang-scan warning: warning: Value stored to 'host_err' is never read [deadcode.DeadStores] Signed-off-by: Colin Ian King Reviewed-by: Jeff Layton Signed-off-by: Chuck Lever --- fs/nfsd/vfs.c | 1 - 1 file changed, 1 deletion(-) diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index 849a720ab43f0..d6d90d63485d6 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -1305,7 +1305,6 @@ nfsd_create_locked(struct svc_rqst *rqstp, struct svc_fh *fhp, iap->ia_mode &= ~current_umask(); err = 0; - host_err = 0; switch (type) { case S_IFREG: host_err = vfs_create(&init_user_ns, dirp, dchild, iap->ia_mode, true); From 5a717a6e0145481ea4c188d8be2d6217cefed270 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Sun, 16 Oct 2022 11:46:56 -0400 Subject: [PATCH 03/49] SUNRPC: Remove unused svc_rqst::rq_lock field Clean up after commit 22700f3c6df5 ("SUNRPC: Improve ordering of transport processing"). Reviewed-by: Jeff Layton Signed-off-by: Chuck Lever --- include/linux/sunrpc/svc.h | 1 - net/sunrpc/svc.c | 1 - 2 files changed, 2 deletions(-) diff --git a/include/linux/sunrpc/svc.h b/include/linux/sunrpc/svc.h index 88de45491376a..0edd837d401d0 100644 --- a/include/linux/sunrpc/svc.h +++ b/include/linux/sunrpc/svc.h @@ -311,7 +311,6 @@ struct svc_rqst { struct auth_domain * rq_gssclient; /* "gss/"-style peer info */ struct svc_cacherep * rq_cacherep; /* cache info */ struct task_struct *rq_task; /* service thread */ - spinlock_t rq_lock; /* per-request lock */ struct net *rq_bc_net; /* pointer to backchannel's * net namespace */ diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c index 149171774bc63..34383c352bc38 100644 --- a/net/sunrpc/svc.c +++ b/net/sunrpc/svc.c @@ -638,7 +638,6 @@ svc_rqst_alloc(struct svc_serv *serv, struct svc_pool *pool, int node) return rqstp; __set_bit(RQ_BUSY, &rqstp->rq_flags); - spin_lock_init(&rqstp->rq_lock); rqstp->rq_server = serv; rqstp->rq_pool = pool; From ea5021e911d3479346a75ac9b7d9dcd751b0fb99 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Sun, 16 Oct 2022 11:47:02 -0400 Subject: [PATCH 04/49] NFSD: Finish converting the NFSv2 GETACL result encoder The xdr_stream conversion inadvertently left some code that set the page_len of the send buffer. The XDR stream encoders should handle this automatically now. This oversight adds garbage past the end of the Reply message. Clients typically ignore the garbage, but NFSD does not need to send it, as it leaks stale memory contents onto the wire. Fixes: f8cba47344f7 ("NFSD: Update the NFSv2 GETACL result encoder to use struct xdr_stream") Reviewed-by: Jeff Layton Signed-off-by: Chuck Lever --- fs/nfsd/nfs2acl.c | 10 ---------- 1 file changed, 10 deletions(-) diff --git a/fs/nfsd/nfs2acl.c b/fs/nfsd/nfs2acl.c index 13e6e6897f6cf..65d4511b7af08 100644 --- a/fs/nfsd/nfs2acl.c +++ b/fs/nfsd/nfs2acl.c @@ -246,7 +246,6 @@ nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, struct xdr_stream *xdr) struct nfsd3_getaclres *resp = rqstp->rq_resp; struct dentry *dentry = resp->fh.fh_dentry; struct inode *inode; - int w; if (!svcxdr_encode_stat(xdr, resp->status)) return false; @@ -260,15 +259,6 @@ nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, struct xdr_stream *xdr) if (xdr_stream_encode_u32(xdr, resp->mask) < 0) return false; - rqstp->rq_res.page_len = w = nfsacl_size( - (resp->mask & NFS_ACL) ? resp->acl_access : NULL, - (resp->mask & NFS_DFACL) ? resp->acl_default : NULL); - while (w > 0) { - if (!*(rqstp->rq_next_page++)) - return true; - w -= PAGE_SIZE; - } - if (!nfs_stream_encode_acl(xdr, inode, resp->acl_access, resp->mask & NFS_ACL, 0)) return false; From 841fd0a3cb490eae5dfd262eccb8c8b11d57f8b8 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Sun, 16 Oct 2022 11:47:08 -0400 Subject: [PATCH 05/49] NFSD: Finish converting the NFSv3 GETACL result encoder For some reason, the NFSv2 GETACL result encoder was fully converted to use the new nfs_stream_encode_acl(), but the NFSv3 equivalent was not similarly converted. Fixes: 20798dfe249a ("NFSD: Update the NFSv3 GETACL result encoder to use struct xdr_stream") Reviewed-by: Jeff Layton Signed-off-by: Chuck Lever --- fs/nfsd/nfs3acl.c | 30 ++++++------------------------ 1 file changed, 6 insertions(+), 24 deletions(-) diff --git a/fs/nfsd/nfs3acl.c b/fs/nfsd/nfs3acl.c index 2fb9ee3564558..a34a22e272ad5 100644 --- a/fs/nfsd/nfs3acl.c +++ b/fs/nfsd/nfs3acl.c @@ -171,11 +171,7 @@ nfs3svc_encode_getaclres(struct svc_rqst *rqstp, struct xdr_stream *xdr) { struct nfsd3_getaclres *resp = rqstp->rq_resp; struct dentry *dentry = resp->fh.fh_dentry; - struct kvec *head = rqstp->rq_res.head; struct inode *inode; - unsigned int base; - int n; - int w; if (!svcxdr_encode_nfsstat3(xdr, resp->status)) return false; @@ -187,26 +183,12 @@ nfs3svc_encode_getaclres(struct svc_rqst *rqstp, struct xdr_stream *xdr) if (xdr_stream_encode_u32(xdr, resp->mask) < 0) return false; - base = (char *)xdr->p - (char *)head->iov_base; - - rqstp->rq_res.page_len = w = nfsacl_size( - (resp->mask & NFS_ACL) ? resp->acl_access : NULL, - (resp->mask & NFS_DFACL) ? resp->acl_default : NULL); - while (w > 0) { - if (!*(rqstp->rq_next_page++)) - return false; - w -= PAGE_SIZE; - } - - n = nfsacl_encode(&rqstp->rq_res, base, inode, - resp->acl_access, - resp->mask & NFS_ACL, 0); - if (n > 0) - n = nfsacl_encode(&rqstp->rq_res, base + n, inode, - resp->acl_default, - resp->mask & NFS_DFACL, - NFS_ACL_DEFAULT); - if (n <= 0) + if (!nfs_stream_encode_acl(xdr, inode, resp->acl_access, + resp->mask & NFS_ACL, 0)) + return false; + if (!nfs_stream_encode_acl(xdr, inode, resp->acl_default, + resp->mask & NFS_DFACL, + NFS_ACL_DEFAULT)) return false; break; default: From 8e823bafff2308753d430566256c83d8085952da Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Tue, 18 Oct 2022 07:47:54 -0400 Subject: [PATCH 06/49] nfsd: ignore requests to disable unsupported versions The kernel currently errors out if you attempt to enable or disable a version that it doesn't recognize. Change it to ignore attempts to disable an unrecognized version. If we don't support it, then there is no harm in doing so. Signed-off-by: Jeff Layton Reviewed-by: Tom Talpey Signed-off-by: Chuck Lever --- fs/nfsd/nfsctl.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c index dc74a947a440c..68ed42fd29fc8 100644 --- a/fs/nfsd/nfsctl.c +++ b/fs/nfsd/nfsctl.c @@ -601,7 +601,9 @@ static ssize_t __write_versions(struct file *file, char *buf, size_t size) } break; default: - return -EINVAL; + /* Ignore requests to disable non-existent versions */ + if (cmd == NFSD_SET) + return -EINVAL; } vers += len + 1; } while ((len = qword_get(&mesg, vers, size)) > 0); From cb12fae1c34b1fa7eaae92c5aadc72d86d7fae19 Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Tue, 18 Oct 2022 07:47:55 -0400 Subject: [PATCH 07/49] nfsd: move nfserrno() to vfs.c nfserrno() is common to all nfs versions, but nfsproc.c is specifically for NFSv2. Move it to vfs.c, and the prototype to vfs.h. While we're in here, remove the #ifdef EDQUOT check in this function. It's apparently a holdover from the initial merge of the nfsd code in 1997. No other place in the kernel checks that that symbol is defined before using it, so I think we can dispense with it here. Signed-off-by: Jeff Layton Signed-off-by: Chuck Lever --- fs/nfsd/blocklayout.c | 1 + fs/nfsd/blocklayoutxdr.c | 1 + fs/nfsd/export.h | 1 - fs/nfsd/flexfilelayout.c | 1 + fs/nfsd/nfs4idmap.c | 1 + fs/nfsd/nfsproc.c | 62 --------------------------------------- fs/nfsd/vfs.c | 63 ++++++++++++++++++++++++++++++++++++++++ fs/nfsd/vfs.h | 1 + 8 files changed, 68 insertions(+), 63 deletions(-) diff --git a/fs/nfsd/blocklayout.c b/fs/nfsd/blocklayout.c index b6d01d51a7465..04697f8dc37d6 100644 --- a/fs/nfsd/blocklayout.c +++ b/fs/nfsd/blocklayout.c @@ -12,6 +12,7 @@ #include "blocklayoutxdr.h" #include "pnfs.h" #include "filecache.h" +#include "vfs.h" #define NFSDDBG_FACILITY NFSDDBG_PNFS diff --git a/fs/nfsd/blocklayoutxdr.c b/fs/nfsd/blocklayoutxdr.c index 442543304930b..8e9c1a0f8d380 100644 --- a/fs/nfsd/blocklayoutxdr.c +++ b/fs/nfsd/blocklayoutxdr.c @@ -9,6 +9,7 @@ #include "nfsd.h" #include "blocklayoutxdr.h" +#include "vfs.h" #define NFSDDBG_FACILITY NFSDDBG_PNFS diff --git a/fs/nfsd/export.h b/fs/nfsd/export.h index ee0e3aba4a6e5..d03f7f6a8642d 100644 --- a/fs/nfsd/export.h +++ b/fs/nfsd/export.h @@ -115,7 +115,6 @@ struct svc_export * rqst_find_fsidzero_export(struct svc_rqst *); int exp_rootfh(struct net *, struct auth_domain *, char *path, struct knfsd_fh *, int maxsize); __be32 exp_pseudoroot(struct svc_rqst *, struct svc_fh *); -__be32 nfserrno(int errno); static inline void exp_put(struct svc_export *exp) { diff --git a/fs/nfsd/flexfilelayout.c b/fs/nfsd/flexfilelayout.c index 070f90ed09b61..3ca5304440ff0 100644 --- a/fs/nfsd/flexfilelayout.c +++ b/fs/nfsd/flexfilelayout.c @@ -15,6 +15,7 @@ #include "flexfilelayoutxdr.h" #include "pnfs.h" +#include "vfs.h" #define NFSDDBG_FACILITY NFSDDBG_PNFS diff --git a/fs/nfsd/nfs4idmap.c b/fs/nfsd/nfs4idmap.c index e70a1a2999b7b..5e9809aff37eb 100644 --- a/fs/nfsd/nfs4idmap.c +++ b/fs/nfsd/nfs4idmap.c @@ -41,6 +41,7 @@ #include "idmap.h" #include "nfsd.h" #include "netns.h" +#include "vfs.h" /* * Turn off idmapping when using AUTH_SYS. diff --git a/fs/nfsd/nfsproc.c b/fs/nfsd/nfsproc.c index 82b3ddeacc338..52fc222c34f26 100644 --- a/fs/nfsd/nfsproc.c +++ b/fs/nfsd/nfsproc.c @@ -848,65 +848,3 @@ const struct svc_version nfsd_version2 = { .vs_dispatch = nfsd_dispatch, .vs_xdrsize = NFS2_SVC_XDRSIZE, }; - -/* - * Map errnos to NFS errnos. - */ -__be32 -nfserrno (int errno) -{ - static struct { - __be32 nfserr; - int syserr; - } nfs_errtbl[] = { - { nfs_ok, 0 }, - { nfserr_perm, -EPERM }, - { nfserr_noent, -ENOENT }, - { nfserr_io, -EIO }, - { nfserr_nxio, -ENXIO }, - { nfserr_fbig, -E2BIG }, - { nfserr_stale, -EBADF }, - { nfserr_acces, -EACCES }, - { nfserr_exist, -EEXIST }, - { nfserr_xdev, -EXDEV }, - { nfserr_mlink, -EMLINK }, - { nfserr_nodev, -ENODEV }, - { nfserr_notdir, -ENOTDIR }, - { nfserr_isdir, -EISDIR }, - { nfserr_inval, -EINVAL }, - { nfserr_fbig, -EFBIG }, - { nfserr_nospc, -ENOSPC }, - { nfserr_rofs, -EROFS }, - { nfserr_mlink, -EMLINK }, - { nfserr_nametoolong, -ENAMETOOLONG }, - { nfserr_notempty, -ENOTEMPTY }, -#ifdef EDQUOT - { nfserr_dquot, -EDQUOT }, -#endif - { nfserr_stale, -ESTALE }, - { nfserr_jukebox, -ETIMEDOUT }, - { nfserr_jukebox, -ERESTARTSYS }, - { nfserr_jukebox, -EAGAIN }, - { nfserr_jukebox, -EWOULDBLOCK }, - { nfserr_jukebox, -ENOMEM }, - { nfserr_io, -ETXTBSY }, - { nfserr_notsupp, -EOPNOTSUPP }, - { nfserr_toosmall, -ETOOSMALL }, - { nfserr_serverfault, -ESERVERFAULT }, - { nfserr_serverfault, -ENFILE }, - { nfserr_io, -EREMOTEIO }, - { nfserr_stale, -EOPENSTALE }, - { nfserr_io, -EUCLEAN }, - { nfserr_perm, -ENOKEY }, - { nfserr_no_grace, -ENOGRACE}, - }; - int i; - - for (i = 0; i < ARRAY_SIZE(nfs_errtbl); i++) { - if (nfs_errtbl[i].syserr == errno) - return nfs_errtbl[i].nfserr; - } - WARN_ONCE(1, "nfsd: non-standard errno: %d\n", errno); - return nfserr_io; -} - diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index d6d90d63485d6..278ebc6770619 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -49,6 +49,69 @@ #define NFSDDBG_FACILITY NFSDDBG_FILEOP +/** + * nfserrno - Map Linux errnos to NFS errnos + * @errno: POSIX(-ish) error code to be mapped + * + * Returns the appropriate (net-endian) nfserr_* (or nfs_ok if errno is 0). If + * it's an error we don't expect, log it once and return nfserr_io. + */ +__be32 +nfserrno (int errno) +{ + static struct { + __be32 nfserr; + int syserr; + } nfs_errtbl[] = { + { nfs_ok, 0 }, + { nfserr_perm, -EPERM }, + { nfserr_noent, -ENOENT }, + { nfserr_io, -EIO }, + { nfserr_nxio, -ENXIO }, + { nfserr_fbig, -E2BIG }, + { nfserr_stale, -EBADF }, + { nfserr_acces, -EACCES }, + { nfserr_exist, -EEXIST }, + { nfserr_xdev, -EXDEV }, + { nfserr_mlink, -EMLINK }, + { nfserr_nodev, -ENODEV }, + { nfserr_notdir, -ENOTDIR }, + { nfserr_isdir, -EISDIR }, + { nfserr_inval, -EINVAL }, + { nfserr_fbig, -EFBIG }, + { nfserr_nospc, -ENOSPC }, + { nfserr_rofs, -EROFS }, + { nfserr_mlink, -EMLINK }, + { nfserr_nametoolong, -ENAMETOOLONG }, + { nfserr_notempty, -ENOTEMPTY }, + { nfserr_dquot, -EDQUOT }, + { nfserr_stale, -ESTALE }, + { nfserr_jukebox, -ETIMEDOUT }, + { nfserr_jukebox, -ERESTARTSYS }, + { nfserr_jukebox, -EAGAIN }, + { nfserr_jukebox, -EWOULDBLOCK }, + { nfserr_jukebox, -ENOMEM }, + { nfserr_io, -ETXTBSY }, + { nfserr_notsupp, -EOPNOTSUPP }, + { nfserr_toosmall, -ETOOSMALL }, + { nfserr_serverfault, -ESERVERFAULT }, + { nfserr_serverfault, -ENFILE }, + { nfserr_io, -EREMOTEIO }, + { nfserr_stale, -EOPENSTALE }, + { nfserr_io, -EUCLEAN }, + { nfserr_perm, -ENOKEY }, + { nfserr_no_grace, -ENOGRACE}, + }; + int i; + + for (i = 0; i < ARRAY_SIZE(nfs_errtbl); i++) { + if (nfs_errtbl[i].syserr == errno) + return nfs_errtbl[i].nfserr; + } + WARN_ONCE(1, "nfsd: non-standard errno: %d\n", errno); + return nfserr_io; +} + /* * Called from nfsd_lookup and encode_dirent. Check if we have crossed * a mount point. diff --git a/fs/nfsd/vfs.h b/fs/nfsd/vfs.h index 120521bc7b247..8ddd687f83599 100644 --- a/fs/nfsd/vfs.h +++ b/fs/nfsd/vfs.h @@ -60,6 +60,7 @@ static inline void nfsd_attrs_free(struct nfsd_attrs *attrs) posix_acl_release(attrs->na_dpacl); } +__be32 nfserrno (int errno); int nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp, struct svc_export **expp); __be32 nfsd_lookup(struct svc_rqst *, struct svc_fh *, From 2f3a4b2ac2f28b9be78ad21f401f31e263845214 Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Tue, 18 Oct 2022 07:47:56 -0400 Subject: [PATCH 08/49] nfsd: allow disabling NFSv2 at compile time rpc.nfsd stopped supporting NFSv2 a year ago. Take the next logical step toward deprecating it and allow NFSv2 support to be compiled out. Add a new CONFIG_NFSD_V2 option that can be turned off and rework the CONFIG_NFSD_V?_ACL option dependencies. Add a description that discourages enabling it. Also, change the description of CONFIG_NFSD to state that the always-on version is now 3 instead of 2. Finally, add an #ifdef around "case 2:" in __write_versions. When NFSv2 is disabled at compile time, this should make the kernel ignore attempts to disable it at runtime, but still error out when trying to enable it. Signed-off-by: Jeff Layton Reviewed-by: Tom Talpey Signed-off-by: Chuck Lever --- fs/nfsd/Kconfig | 19 +++++++++++++++---- fs/nfsd/Makefile | 5 +++-- fs/nfsd/nfsctl.c | 2 ++ fs/nfsd/nfsd.h | 3 +-- fs/nfsd/nfssvc.c | 6 ++++++ 5 files changed, 27 insertions(+), 8 deletions(-) diff --git a/fs/nfsd/Kconfig b/fs/nfsd/Kconfig index f6a2fd3015e75..7c441f2bd4440 100644 --- a/fs/nfsd/Kconfig +++ b/fs/nfsd/Kconfig @@ -8,6 +8,7 @@ config NFSD select SUNRPC select EXPORTFS select NFS_ACL_SUPPORT if NFSD_V2_ACL + select NFS_ACL_SUPPORT if NFSD_V3_ACL depends on MULTIUSER help Choose Y here if you want to allow other computers to access @@ -26,19 +27,29 @@ config NFSD Below you can choose which versions of the NFS protocol are available to clients mounting the NFS server on this system. - Support for NFS version 2 (RFC 1094) is always available when + Support for NFS version 3 (RFC 1813) is always available when CONFIG_NFSD is selected. If unsure, say N. -config NFSD_V2_ACL - bool +config NFSD_V2 + bool "NFS server support for NFS version 2 (DEPRECATED)" depends on NFSD + default n + help + NFSv2 (RFC 1094) was the first publicly-released version of NFS. + Unless you are hosting ancient (1990's era) NFS clients, you don't + need this. + + If unsure, say N. + +config NFSD_V2_ACL + bool "NFS server support for the NFSv2 ACL protocol extension" + depends on NFSD_V2 config NFSD_V3_ACL bool "NFS server support for the NFSv3 ACL protocol extension" depends on NFSD - select NFSD_V2_ACL help Solaris NFS servers support an auxiliary NFSv3 ACL protocol that never became an official part of the NFS version 3 protocol. diff --git a/fs/nfsd/Makefile b/fs/nfsd/Makefile index 805c06d5f1b4b..6fffc8f03f740 100644 --- a/fs/nfsd/Makefile +++ b/fs/nfsd/Makefile @@ -10,9 +10,10 @@ obj-$(CONFIG_NFSD) += nfsd.o # this one should be compiled first, as the tracing macros can easily blow up nfsd-y += trace.o -nfsd-y += nfssvc.o nfsctl.o nfsproc.o nfsfh.o vfs.o \ - export.o auth.o lockd.o nfscache.o nfsxdr.o \ +nfsd-y += nfssvc.o nfsctl.o nfsfh.o vfs.o \ + export.o auth.o lockd.o nfscache.o \ stats.o filecache.o nfs3proc.o nfs3xdr.o +nfsd-$(CONFIG_NFSD_V2) += nfsproc.o nfsxdr.o nfsd-$(CONFIG_NFSD_V2_ACL) += nfs2acl.o nfsd-$(CONFIG_NFSD_V3_ACL) += nfs3acl.o nfsd-$(CONFIG_NFSD_V4) += nfs4proc.o nfs4xdr.o nfs4state.o nfs4idmap.o \ diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c index 68ed42fd29fc8..d1e581a60480c 100644 --- a/fs/nfsd/nfsctl.c +++ b/fs/nfsd/nfsctl.c @@ -581,7 +581,9 @@ static ssize_t __write_versions(struct file *file, char *buf, size_t size) cmd = sign == '-' ? NFSD_CLEAR : NFSD_SET; switch(num) { +#ifdef CONFIG_NFSD_V2 case 2: +#endif case 3: nfsd_vers(nn, num, cmd); break; diff --git a/fs/nfsd/nfsd.h b/fs/nfsd/nfsd.h index 09726c5b9a317..93b42ef9ed91b 100644 --- a/fs/nfsd/nfsd.h +++ b/fs/nfsd/nfsd.h @@ -64,8 +64,7 @@ struct readdir_cd { extern struct svc_program nfsd_program; -extern const struct svc_version nfsd_version2, nfsd_version3, - nfsd_version4; +extern const struct svc_version nfsd_version2, nfsd_version3, nfsd_version4; extern struct mutex nfsd_mutex; extern spinlock_t nfsd_drc_lock; extern unsigned long nfsd_drc_max_mem; diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c index bfbd9f672f59e..62e473b0ca52a 100644 --- a/fs/nfsd/nfssvc.c +++ b/fs/nfsd/nfssvc.c @@ -91,8 +91,12 @@ unsigned long nfsd_drc_mem_used; #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) static struct svc_stat nfsd_acl_svcstats; static const struct svc_version *nfsd_acl_version[] = { +# if defined(CONFIG_NFSD_V2_ACL) [2] = &nfsd_acl_version2, +# endif +# if defined(CONFIG_NFSD_V3_ACL) [3] = &nfsd_acl_version3, +# endif }; #define NFSD_ACL_MINVERS 2 @@ -116,7 +120,9 @@ static struct svc_stat nfsd_acl_svcstats = { #endif /* defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) */ static const struct svc_version *nfsd_version[] = { +#if defined(CONFIG_NFSD_V2) [2] = &nfsd_version2, +#endif [3] = &nfsd_version3, #if defined(CONFIG_NFSD_V4) [4] = &nfsd_version4, From 427505ffeaa464f683faba945a88d3e3248f6979 Mon Sep 17 00:00:00 2001 From: David Disseldorp Date: Fri, 21 Oct 2022 14:24:14 +0200 Subject: [PATCH 09/49] exportfs: use pr_debug for unreachable debug statements expfs.c has a bunch of dprintk statements which are unusable due to: #define dprintk(fmt, args...) do{}while(0) Use pr_debug so that they can be enabled dynamically. Also make some minor changes to the debug statements to fix some incorrect types, and remove __func__ which can be handled by dynamic debug separately. Signed-off-by: David Disseldorp Reviewed-by: NeilBrown Signed-off-by: Chuck Lever --- fs/exportfs/expfs.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c index c648a493faf23..3204bd33e4e8a 100644 --- a/fs/exportfs/expfs.c +++ b/fs/exportfs/expfs.c @@ -18,7 +18,7 @@ #include #include -#define dprintk(fmt, args...) do{}while(0) +#define dprintk(fmt, args...) pr_debug(fmt, ##args) static int get_name(const struct path *path, char *name, struct dentry *child); @@ -132,8 +132,8 @@ static struct dentry *reconnect_one(struct vfsmount *mnt, inode_unlock(dentry->d_inode); if (IS_ERR(parent)) { - dprintk("%s: get_parent of %ld failed, err %d\n", - __func__, dentry->d_inode->i_ino, PTR_ERR(parent)); + dprintk("get_parent of %lu failed, err %ld\n", + dentry->d_inode->i_ino, PTR_ERR(parent)); return parent; } @@ -147,7 +147,7 @@ static struct dentry *reconnect_one(struct vfsmount *mnt, dprintk("%s: found name: %s\n", __func__, nbuf); tmp = lookup_one_unlocked(mnt_user_ns(mnt), nbuf, parent, strlen(nbuf)); if (IS_ERR(tmp)) { - dprintk("%s: lookup failed: %d\n", __func__, PTR_ERR(tmp)); + dprintk("lookup failed: %ld\n", PTR_ERR(tmp)); err = PTR_ERR(tmp); goto out_err; } From e0aa651068bfd520afcd357af8ecd2de005fc83d Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Fri, 28 Oct 2022 08:13:53 -0400 Subject: [PATCH 10/49] nfsd: don't call nfsd_file_put from client states seqfile display We had a report of this: BUG: sleeping function called from invalid context at fs/nfsd/filecache.c:440 ...with a stack trace showing nfsd_file_put being called from nfs4_show_open. This code has always tried to call fput while holding a spinlock, but we recently changed this to use the filecache, and that started triggering the might_sleep() in nfsd_file_put. states_start takes and holds the cl_lock while iterating over the client's states, and we can't sleep with that held. Have the various nfs4_show_* functions instead hold the fi_lock instead of taking a nfsd_file reference. Fixes: 78599c42ae3c ("nfsd4: add file to display list of client's opens") Link: https://bugzilla.redhat.com/show_bug.cgi?id=2138357 Reported-by: Zhi Li Signed-off-by: Jeff Layton Signed-off-by: Chuck Lever --- fs/nfsd/nfs4state.c | 51 +++++++++++++++++++++++++++++---------------- 1 file changed, 33 insertions(+), 18 deletions(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 836bd825ca4ad..52b5552d0d70e 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -675,15 +675,26 @@ find_any_file(struct nfs4_file *f) return ret; } -static struct nfsd_file *find_deleg_file(struct nfs4_file *f) +static struct nfsd_file *find_any_file_locked(struct nfs4_file *f) { - struct nfsd_file *ret = NULL; + lockdep_assert_held(&f->fi_lock); + + if (f->fi_fds[O_RDWR]) + return f->fi_fds[O_RDWR]; + if (f->fi_fds[O_WRONLY]) + return f->fi_fds[O_WRONLY]; + if (f->fi_fds[O_RDONLY]) + return f->fi_fds[O_RDONLY]; + return NULL; +} + +static struct nfsd_file *find_deleg_file_locked(struct nfs4_file *f) +{ + lockdep_assert_held(&f->fi_lock); - spin_lock(&f->fi_lock); if (f->fi_deleg_file) - ret = nfsd_file_get(f->fi_deleg_file); - spin_unlock(&f->fi_lock); - return ret; + return f->fi_deleg_file; + return NULL; } static atomic_long_t num_delegations; @@ -2613,9 +2624,11 @@ static int nfs4_show_open(struct seq_file *s, struct nfs4_stid *st) ols = openlockstateid(st); oo = ols->st_stateowner; nf = st->sc_file; - file = find_any_file(nf); + + spin_lock(&nf->fi_lock); + file = find_any_file_locked(nf); if (!file) - return 0; + goto out; seq_printf(s, "- "); nfs4_show_stateid(s, &st->sc_stateid); @@ -2637,8 +2650,8 @@ static int nfs4_show_open(struct seq_file *s, struct nfs4_stid *st) seq_printf(s, ", "); nfs4_show_owner(s, oo); seq_printf(s, " }\n"); - nfsd_file_put(file); - +out: + spin_unlock(&nf->fi_lock); return 0; } @@ -2652,9 +2665,10 @@ static int nfs4_show_lock(struct seq_file *s, struct nfs4_stid *st) ols = openlockstateid(st); oo = ols->st_stateowner; nf = st->sc_file; - file = find_any_file(nf); + spin_lock(&nf->fi_lock); + file = find_any_file_locked(nf); if (!file) - return 0; + goto out; seq_printf(s, "- "); nfs4_show_stateid(s, &st->sc_stateid); @@ -2674,8 +2688,8 @@ static int nfs4_show_lock(struct seq_file *s, struct nfs4_stid *st) seq_printf(s, ", "); nfs4_show_owner(s, oo); seq_printf(s, " }\n"); - nfsd_file_put(file); - +out: + spin_unlock(&nf->fi_lock); return 0; } @@ -2687,9 +2701,10 @@ static int nfs4_show_deleg(struct seq_file *s, struct nfs4_stid *st) ds = delegstateid(st); nf = st->sc_file; - file = find_deleg_file(nf); + spin_lock(&nf->fi_lock); + file = find_deleg_file_locked(nf); if (!file) - return 0; + goto out; seq_printf(s, "- "); nfs4_show_stateid(s, &st->sc_stateid); @@ -2705,8 +2720,8 @@ static int nfs4_show_deleg(struct seq_file *s, struct nfs4_stid *st) seq_printf(s, ", "); nfs4_show_fname(s, file); seq_printf(s, " }\n"); - nfsd_file_put(file); - +out: + spin_unlock(&nf->fi_lock); return 0; } From c252849082ff525af18b4f253b3c9ece94e951ed Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Fri, 28 Oct 2022 10:46:38 -0400 Subject: [PATCH 11/49] NFSD: Pass the target nfsd_file to nfsd_commit() In a moment I'm going to introduce separate nfsd_file types, one of which is garbage-collected; the other, not. The garbage-collected variety is to be used by NFSv2 and v3, and the non-garbage-collected variety is to be used by NFSv4. nfsd_commit() is invoked by both NFSv3 and NFSv4 consumers. We want nfsd_commit() to find and use the correct variety of cached nfsd_file object for the NFS version that is in use. Signed-off-by: Chuck Lever Tested-by: Jeff Layton Reviewed-by: Jeff Layton Reviewed-by: NeilBrown --- fs/nfsd/nfs3proc.c | 10 +++++++++- fs/nfsd/nfs4proc.c | 11 ++++++++++- fs/nfsd/vfs.c | 15 ++++----------- fs/nfsd/vfs.h | 3 ++- 4 files changed, 25 insertions(+), 14 deletions(-) diff --git a/fs/nfsd/nfs3proc.c b/fs/nfsd/nfs3proc.c index 923d9a80df92c..ff29205463332 100644 --- a/fs/nfsd/nfs3proc.c +++ b/fs/nfsd/nfs3proc.c @@ -13,6 +13,7 @@ #include "cache.h" #include "xdr3.h" #include "vfs.h" +#include "filecache.h" #define NFSDDBG_FACILITY NFSDDBG_PROC @@ -763,6 +764,7 @@ nfsd3_proc_commit(struct svc_rqst *rqstp) { struct nfsd3_commitargs *argp = rqstp->rq_argp; struct nfsd3_commitres *resp = rqstp->rq_resp; + struct nfsd_file *nf; dprintk("nfsd: COMMIT(3) %s %u@%Lu\n", SVCFH_fmt(&argp->fh), @@ -770,8 +772,14 @@ nfsd3_proc_commit(struct svc_rqst *rqstp) (unsigned long long) argp->offset); fh_copy(&resp->fh, &argp->fh); - resp->status = nfsd_commit(rqstp, &resp->fh, argp->offset, + resp->status = nfsd_file_acquire(rqstp, &resp->fh, NFSD_MAY_WRITE | + NFSD_MAY_NOT_BREAK_LEASE, &nf); + if (resp->status) + goto out; + resp->status = nfsd_commit(rqstp, &resp->fh, nf, argp->offset, argp->count, resp->verf); + nfsd_file_put(nf); +out: return rpc_success; } diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index 8beb2bc4c328f..42db62413890e 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -731,10 +731,19 @@ nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) { struct nfsd4_commit *commit = &u->commit; + struct nfsd_file *nf; + __be32 status; - return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, + status = nfsd_file_acquire(rqstp, &cstate->current_fh, NFSD_MAY_WRITE | + NFSD_MAY_NOT_BREAK_LEASE, &nf); + if (status != nfs_ok) + return status; + + status = nfsd_commit(rqstp, &cstate->current_fh, nf, commit->co_offset, commit->co_count, (__be32 *)commit->co_verf.data); + nfsd_file_put(nf); + return status; } static __be32 diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index 278ebc6770619..6f39d6c381163 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -1196,6 +1196,7 @@ nfsd_write(struct svc_rqst *rqstp, struct svc_fh *fhp, loff_t offset, * nfsd_commit - Commit pending writes to stable storage * @rqstp: RPC request being processed * @fhp: NFS filehandle + * @nf: target file * @offset: raw offset from beginning of file * @count: raw count of bytes to sync * @verf: filled in with the server's current write verifier @@ -1212,19 +1213,13 @@ nfsd_write(struct svc_rqst *rqstp, struct svc_fh *fhp, loff_t offset, * An nfsstat value in network byte order. */ __be32 -nfsd_commit(struct svc_rqst *rqstp, struct svc_fh *fhp, u64 offset, - u32 count, __be32 *verf) +nfsd_commit(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfsd_file *nf, + u64 offset, u32 count, __be32 *verf) { + __be32 err = nfs_ok; u64 maxbytes; loff_t start, end; struct nfsd_net *nn; - struct nfsd_file *nf; - __be32 err; - - err = nfsd_file_acquire(rqstp, fhp, - NFSD_MAY_WRITE|NFSD_MAY_NOT_BREAK_LEASE, &nf); - if (err) - goto out; /* * Convert the client-provided (offset, count) range to a @@ -1265,8 +1260,6 @@ nfsd_commit(struct svc_rqst *rqstp, struct svc_fh *fhp, u64 offset, } else nfsd_copy_write_verifier(verf, nn); - nfsd_file_put(nf); -out: return err; } diff --git a/fs/nfsd/vfs.h b/fs/nfsd/vfs.h index 8ddd687f83599..dbdfef7ae85bb 100644 --- a/fs/nfsd/vfs.h +++ b/fs/nfsd/vfs.h @@ -89,7 +89,8 @@ __be32 nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *); __be32 nfsd_create_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, struct svc_fh *resfhp, struct nfsd_attrs *iap); __be32 nfsd_commit(struct svc_rqst *rqst, struct svc_fh *fhp, - u64 offset, u32 count, __be32 *verf); + struct nfsd_file *nf, u64 offset, u32 count, + __be32 *verf); #ifdef CONFIG_NFSD_V4 __be32 nfsd_getxattr(struct svc_rqst *rqstp, struct svc_fh *fhp, char *name, void **bufp, int *lenp); From dcf3f80965ca787c70def402cdf1553c93c75529 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Fri, 28 Oct 2022 10:46:44 -0400 Subject: [PATCH 12/49] NFSD: Revert "NFSD: NFSv4 CLOSE should release an nfsd_file immediately" This reverts commit 5e138c4a750dc140d881dab4a8804b094bbc08d2. That commit attempted to make files available to other users as soon as all NFSv4 clients were done with them, rather than waiting until the filecache LRU had garbage collected them. It gets the reference counting wrong, for one thing. But it also misses that DELEGRETURN should release a file in the same fashion. In fact, any nfsd_file_put() on an file held open by an NFSv4 client needs potentially to release the file immediately... Clear the way for implementing that idea. Signed-off-by: Chuck Lever Reviewed-by: Jeff Layton Reviewed-by: NeilBrown --- fs/nfsd/filecache.c | 18 ------------------ fs/nfsd/filecache.h | 1 - fs/nfsd/nfs4state.c | 4 ++-- 3 files changed, 2 insertions(+), 21 deletions(-) diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c index ec3fceb92236e..babea79d3f6f2 100644 --- a/fs/nfsd/filecache.c +++ b/fs/nfsd/filecache.c @@ -444,24 +444,6 @@ nfsd_file_put(struct nfsd_file *nf) nfsd_file_put_noref(nf); } -/** - * nfsd_file_close - Close an nfsd_file - * @nf: nfsd_file to close - * - * If this is the final reference for @nf, free it immediately. - * This reflects an on-the-wire CLOSE or DELEGRETURN into the - * VFS and exported filesystem. - */ -void nfsd_file_close(struct nfsd_file *nf) -{ - nfsd_file_put(nf); - if (refcount_dec_if_one(&nf->nf_ref)) { - nfsd_file_unhash(nf); - nfsd_file_lru_remove(nf); - nfsd_file_free(nf); - } -} - struct nfsd_file * nfsd_file_get(struct nfsd_file *nf) { diff --git a/fs/nfsd/filecache.h b/fs/nfsd/filecache.h index 357832bac736b..6b012ea4bd9da 100644 --- a/fs/nfsd/filecache.h +++ b/fs/nfsd/filecache.h @@ -52,7 +52,6 @@ void nfsd_file_cache_shutdown(void); int nfsd_file_cache_start_net(struct net *net); void nfsd_file_cache_shutdown_net(struct net *net); void nfsd_file_put(struct nfsd_file *nf); -void nfsd_file_close(struct nfsd_file *nf); struct nfsd_file *nfsd_file_get(struct nfsd_file *nf); void nfsd_file_close_inode_sync(struct inode *inode); bool nfsd_file_is_cached(struct inode *inode); diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 52b5552d0d70e..16c3e991ddccb 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -842,9 +842,9 @@ static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) swap(f2, fp->fi_fds[O_RDWR]); spin_unlock(&fp->fi_lock); if (f1) - nfsd_file_close(f1); + nfsd_file_put(f1); if (f2) - nfsd_file_close(f2); + nfsd_file_put(f2); } } From 4d1ea8455716ca070e3cd85767e6f6a562a58b1b Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Fri, 28 Oct 2022 10:46:51 -0400 Subject: [PATCH 13/49] NFSD: Add an NFSD_FILE_GC flag to enable nfsd_file garbage collection NFSv4 operations manage the lifetime of nfsd_file items they use by means of NFSv4 OPEN and CLOSE. Hence there's no need for them to be garbage collected. Introduce a mechanism to enable garbage collection for nfsd_file items used only by NFSv2/3 callers. Note that the change in nfsd_file_put() ensures that both CLOSE and DELEGRETURN will actually close out and free an nfsd_file on last reference of a non-garbage-collected file. Link: https://bugzilla.linux-nfs.org/show_bug.cgi?id=394 Suggested-by: Trond Myklebust Signed-off-by: Chuck Lever Tested-by: Jeff Layton Reviewed-by: NeilBrown Reviewed-by: Jeff Layton --- fs/nfsd/filecache.c | 63 +++++++++++++++++++++++++++++++++++++++------ fs/nfsd/filecache.h | 3 +++ fs/nfsd/nfs3proc.c | 4 +-- fs/nfsd/trace.h | 3 ++- fs/nfsd/vfs.c | 4 +-- 5 files changed, 64 insertions(+), 13 deletions(-) diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c index babea79d3f6f2..cee44405cf7d3 100644 --- a/fs/nfsd/filecache.c +++ b/fs/nfsd/filecache.c @@ -63,6 +63,7 @@ struct nfsd_file_lookup_key { struct net *net; const struct cred *cred; unsigned char need; + bool gc; enum nfsd_file_lookup_type type; }; @@ -162,6 +163,8 @@ static int nfsd_file_obj_cmpfn(struct rhashtable_compare_arg *arg, return 1; if (!nfsd_match_cred(nf->nf_cred, key->cred)) return 1; + if (!!test_bit(NFSD_FILE_GC, &nf->nf_flags) != key->gc) + return 1; if (test_bit(NFSD_FILE_HASHED, &nf->nf_flags) == 0) return 1; break; @@ -297,6 +300,8 @@ nfsd_file_alloc(struct nfsd_file_lookup_key *key, unsigned int may) nf->nf_flags = 0; __set_bit(NFSD_FILE_HASHED, &nf->nf_flags); __set_bit(NFSD_FILE_PENDING, &nf->nf_flags); + if (key->gc) + __set_bit(NFSD_FILE_GC, &nf->nf_flags); nf->nf_inode = key->inode; /* nf_ref is pre-incremented for hash table */ refcount_set(&nf->nf_ref, 2); @@ -428,16 +433,27 @@ nfsd_file_put_noref(struct nfsd_file *nf) } } +static void +nfsd_file_unhash_and_put(struct nfsd_file *nf) +{ + if (nfsd_file_unhash(nf)) + nfsd_file_put_noref(nf); +} + void nfsd_file_put(struct nfsd_file *nf) { might_sleep(); - nfsd_file_lru_add(nf); - if (test_bit(NFSD_FILE_HASHED, &nf->nf_flags) == 0) { + if (test_bit(NFSD_FILE_GC, &nf->nf_flags)) + nfsd_file_lru_add(nf); + else if (refcount_read(&nf->nf_ref) == 2) + nfsd_file_unhash_and_put(nf); + + if (!test_bit(NFSD_FILE_HASHED, &nf->nf_flags)) { nfsd_file_flush(nf); nfsd_file_put_noref(nf); - } else if (nf->nf_file) { + } else if (nf->nf_file && test_bit(NFSD_FILE_GC, &nf->nf_flags)) { nfsd_file_put_noref(nf); nfsd_file_schedule_laundrette(); } else @@ -1016,12 +1032,14 @@ nfsd_file_is_cached(struct inode *inode) static __be32 nfsd_file_do_acquire(struct svc_rqst *rqstp, struct svc_fh *fhp, - unsigned int may_flags, struct nfsd_file **pnf, bool open) + unsigned int may_flags, struct nfsd_file **pnf, + bool open, bool want_gc) { struct nfsd_file_lookup_key key = { .type = NFSD_FILE_KEY_FULL, .need = may_flags & NFSD_FILE_MAY_MASK, .net = SVC_NET(rqstp), + .gc = want_gc, }; bool open_retry = true; struct nfsd_file *nf; @@ -1117,14 +1135,35 @@ nfsd_file_do_acquire(struct svc_rqst *rqstp, struct svc_fh *fhp, * then unhash. */ if (status != nfs_ok || key.inode->i_nlink == 0) - if (nfsd_file_unhash(nf)) - nfsd_file_put_noref(nf); + nfsd_file_unhash_and_put(nf); clear_bit_unlock(NFSD_FILE_PENDING, &nf->nf_flags); smp_mb__after_atomic(); wake_up_bit(&nf->nf_flags, NFSD_FILE_PENDING); goto out; } +/** + * nfsd_file_acquire_gc - Get a struct nfsd_file with an open file + * @rqstp: the RPC transaction being executed + * @fhp: the NFS filehandle of the file to be opened + * @may_flags: NFSD_MAY_ settings for the file + * @pnf: OUT: new or found "struct nfsd_file" object + * + * The nfsd_file object returned by this API is reference-counted + * and garbage-collected. The object is retained for a few + * seconds after the final nfsd_file_put() in case the caller + * wants to re-use it. + * + * Returns nfs_ok and sets @pnf on success; otherwise an nfsstat in + * network byte order is returned. + */ +__be32 +nfsd_file_acquire_gc(struct svc_rqst *rqstp, struct svc_fh *fhp, + unsigned int may_flags, struct nfsd_file **pnf) +{ + return nfsd_file_do_acquire(rqstp, fhp, may_flags, pnf, true, true); +} + /** * nfsd_file_acquire - Get a struct nfsd_file with an open file * @rqstp: the RPC transaction being executed @@ -1132,6 +1171,10 @@ nfsd_file_do_acquire(struct svc_rqst *rqstp, struct svc_fh *fhp, * @may_flags: NFSD_MAY_ settings for the file * @pnf: OUT: new or found "struct nfsd_file" object * + * The nfsd_file_object returned by this API is reference-counted + * but not garbage-collected. The object is unhashed after the + * final nfsd_file_put(). + * * Returns nfs_ok and sets @pnf on success; otherwise an nfsstat in * network byte order is returned. */ @@ -1139,7 +1182,7 @@ __be32 nfsd_file_acquire(struct svc_rqst *rqstp, struct svc_fh *fhp, unsigned int may_flags, struct nfsd_file **pnf) { - return nfsd_file_do_acquire(rqstp, fhp, may_flags, pnf, true); + return nfsd_file_do_acquire(rqstp, fhp, may_flags, pnf, true, false); } /** @@ -1149,6 +1192,10 @@ nfsd_file_acquire(struct svc_rqst *rqstp, struct svc_fh *fhp, * @may_flags: NFSD_MAY_ settings for the file * @pnf: OUT: new or found "struct nfsd_file" object * + * The nfsd_file_object returned by this API is reference-counted + * but not garbage-collected. The object is released immediately + * one RCU grace period after the final nfsd_file_put(). + * * Returns nfs_ok and sets @pnf on success; otherwise an nfsstat in * network byte order is returned. */ @@ -1156,7 +1203,7 @@ __be32 nfsd_file_create(struct svc_rqst *rqstp, struct svc_fh *fhp, unsigned int may_flags, struct nfsd_file **pnf) { - return nfsd_file_do_acquire(rqstp, fhp, may_flags, pnf, false); + return nfsd_file_do_acquire(rqstp, fhp, may_flags, pnf, false, false); } /* diff --git a/fs/nfsd/filecache.h b/fs/nfsd/filecache.h index 6b012ea4bd9da..b7efb2c3ddb18 100644 --- a/fs/nfsd/filecache.h +++ b/fs/nfsd/filecache.h @@ -38,6 +38,7 @@ struct nfsd_file { #define NFSD_FILE_HASHED (0) #define NFSD_FILE_PENDING (1) #define NFSD_FILE_REFERENCED (2) +#define NFSD_FILE_GC (3) unsigned long nf_flags; struct inode *nf_inode; /* don't deref */ refcount_t nf_ref; @@ -55,6 +56,8 @@ void nfsd_file_put(struct nfsd_file *nf); struct nfsd_file *nfsd_file_get(struct nfsd_file *nf); void nfsd_file_close_inode_sync(struct inode *inode); bool nfsd_file_is_cached(struct inode *inode); +__be32 nfsd_file_acquire_gc(struct svc_rqst *rqstp, struct svc_fh *fhp, + unsigned int may_flags, struct nfsd_file **nfp); __be32 nfsd_file_acquire(struct svc_rqst *rqstp, struct svc_fh *fhp, unsigned int may_flags, struct nfsd_file **nfp); __be32 nfsd_file_create(struct svc_rqst *rqstp, struct svc_fh *fhp, diff --git a/fs/nfsd/nfs3proc.c b/fs/nfsd/nfs3proc.c index ff29205463332..d01b29aba6623 100644 --- a/fs/nfsd/nfs3proc.c +++ b/fs/nfsd/nfs3proc.c @@ -772,8 +772,8 @@ nfsd3_proc_commit(struct svc_rqst *rqstp) (unsigned long long) argp->offset); fh_copy(&resp->fh, &argp->fh); - resp->status = nfsd_file_acquire(rqstp, &resp->fh, NFSD_MAY_WRITE | - NFSD_MAY_NOT_BREAK_LEASE, &nf); + resp->status = nfsd_file_acquire_gc(rqstp, &resp->fh, NFSD_MAY_WRITE | + NFSD_MAY_NOT_BREAK_LEASE, &nf); if (resp->status) goto out; resp->status = nfsd_commit(rqstp, &resp->fh, nf, argp->offset, diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h index d4b6839bb459a..3fcfeb7b560f7 100644 --- a/fs/nfsd/trace.h +++ b/fs/nfsd/trace.h @@ -817,7 +817,8 @@ DEFINE_CLID_EVENT(confirmed_r); __print_flags(val, "|", \ { 1 << NFSD_FILE_HASHED, "HASHED" }, \ { 1 << NFSD_FILE_PENDING, "PENDING" }, \ - { 1 << NFSD_FILE_REFERENCED, "REFERENCED"}) + { 1 << NFSD_FILE_REFERENCED, "REFERENCED"}, \ + { 1 << NFSD_FILE_GC, "GC"}) DECLARE_EVENT_CLASS(nfsd_file_class, TP_PROTO(struct nfsd_file *nf), diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index 6f39d6c381163..961e411080f92 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -1148,7 +1148,7 @@ __be32 nfsd_read(struct svc_rqst *rqstp, struct svc_fh *fhp, __be32 err; trace_nfsd_read_start(rqstp, fhp, offset, *count); - err = nfsd_file_acquire(rqstp, fhp, NFSD_MAY_READ, &nf); + err = nfsd_file_acquire_gc(rqstp, fhp, NFSD_MAY_READ, &nf); if (err) return err; @@ -1180,7 +1180,7 @@ nfsd_write(struct svc_rqst *rqstp, struct svc_fh *fhp, loff_t offset, trace_nfsd_write_start(rqstp, fhp, offset, *cnt); - err = nfsd_file_acquire(rqstp, fhp, NFSD_MAY_WRITE, &nf); + err = nfsd_file_acquire_gc(rqstp, fhp, NFSD_MAY_WRITE, &nf); if (err) goto out; From b3276c1f5b268ff56622e9e125b792b4c3dc03ac Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Tue, 1 Nov 2022 13:30:46 -0400 Subject: [PATCH 14/49] NFSD: Flesh out a documenting comment for filecache.c Record what we've learned recently about the NFSD filecache in a documenting comment so our future selves don't forget what all this is for. Signed-off-by: Chuck Lever Reviewed-by: Jeff Layton --- fs/nfsd/filecache.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c index cee44405cf7d3..897dd47ffb0a4 100644 --- a/fs/nfsd/filecache.c +++ b/fs/nfsd/filecache.c @@ -2,6 +2,30 @@ * Open file cache. * * (c) 2015 - Jeff Layton + * + * An nfsd_file object is a per-file collection of open state that binds + * together: + * - a struct file * + * - a user credential + * - a network namespace + * - a read-ahead context + * - monitoring for writeback errors + * + * nfsd_file objects are reference-counted. Consumers acquire a new + * object via the nfsd_file_acquire API. They manage their interest in + * the acquired object, and hence the object's reference count, via + * nfsd_file_get and nfsd_file_put. There are two varieties of nfsd_file + * object: + * + * * non-garbage-collected: When a consumer wants to precisely control + * the lifetime of a file's open state, it acquires a non-garbage- + * collected nfsd_file. The final nfsd_file_put releases the open + * state immediately. + * + * * garbage-collected: When a consumer does not control the lifetime + * of open state, it acquires a garbage-collected nfsd_file. The + * final nfsd_file_put allows the open state to linger for a period + * during which it may be re-used. */ #include From eeff73f7c1c583f79a401284f46c619294859310 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Fri, 28 Oct 2022 10:46:57 -0400 Subject: [PATCH 15/49] NFSD: Clean up nfs4_preprocess_stateid_op() call sites Remove the lame-duck dprintk()s around nfs4_preprocess_stateid_op() call sites. Signed-off-by: Chuck Lever Tested-by: Jeff Layton Reviewed-by: Jeff Layton Reviewed-by: NeilBrown --- fs/nfsd/nfs4proc.c | 31 +++++++------------------------ 1 file changed, 7 insertions(+), 24 deletions(-) diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index 42db62413890e..6f7e0c5e62d2b 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -943,12 +943,7 @@ nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, &read->rd_stateid, RD_STATE, &read->rd_nf, NULL); - if (status) { - dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); - goto out; - } - status = nfs_ok; -out: + read->rd_rqstp = rqstp; read->rd_fhp = &cstate->current_fh; return status; @@ -1117,10 +1112,8 @@ nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, &setattr->sa_stateid, WR_STATE, NULL, NULL); - if (status) { - dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); + if (status) return status; - } } err = fh_want_write(&cstate->current_fh); if (err) @@ -1168,10 +1161,8 @@ nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, write->wr_offset, cnt); status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, stateid, WR_STATE, &nf, NULL); - if (status) { - dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); + if (status) return status; - } write->wr_how_written = write->wr_stable_how; @@ -1202,17 +1193,13 @@ nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh, src_stateid, RD_STATE, src, NULL); - if (status) { - dprintk("NFSD: %s: couldn't process src stateid!\n", __func__); + if (status) goto out; - } status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, dst_stateid, WR_STATE, dst, NULL); - if (status) { - dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__); + if (status) goto out_put_src; - } /* fix up for NFS-specific error code */ if (!S_ISREG(file_inode((*src)->nf_file)->i_mode) || @@ -1957,10 +1944,8 @@ nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, &fallocate->falloc_stateid, WR_STATE, &nf, NULL); - if (status != nfs_ok) { - dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n"); + if (status != nfs_ok) return status; - } status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, nf->nf_file, fallocate->falloc_offset, @@ -2016,10 +2001,8 @@ nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, &seek->seek_stateid, RD_STATE, &nf, NULL); - if (status) { - dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n"); + if (status) return status; - } switch (seek->seek_whence) { case NFS4_CONTENT_DATA: From 20eee313ff4b8a7e71ae9560f5c4ba27cd763005 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Fri, 28 Oct 2022 10:47:03 -0400 Subject: [PATCH 16/49] NFSD: Trace stateids returned via DELEGRETURN Handing out a delegation stateid is recorded with the nfsd_deleg_read tracepoint, but there isn't a matching tracepoint for recording when the stateid is returned. Signed-off-by: Chuck Lever Reviewed-by: Jeff Layton --- fs/nfsd/nfs4state.c | 1 + fs/nfsd/trace.h | 1 + 2 files changed, 2 insertions(+) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 16c3e991ddccb..9ec66611a458b 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -6917,6 +6917,7 @@ nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, if (status) goto put_stateid; + trace_nfsd_deleg_return(stateid); wake_up_var(d_inode(cstate->current_fh.fh_dentry)); destroy_delegation(dp); put_stateid: diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h index 3fcfeb7b560f7..00908f75e0a6a 100644 --- a/fs/nfsd/trace.h +++ b/fs/nfsd/trace.h @@ -604,6 +604,7 @@ DEFINE_STATEID_EVENT(layout_recall_release); DEFINE_STATEID_EVENT(open); DEFINE_STATEID_EVENT(deleg_read); +DEFINE_STATEID_EVENT(deleg_return); DEFINE_STATEID_EVENT(deleg_recall); DECLARE_EVENT_CLASS(nfsd_stateseqid_class, From a1c74569bbde91299f24535abf711be5c84df9de Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Fri, 28 Oct 2022 10:47:09 -0400 Subject: [PATCH 17/49] NFSD: Trace delegation revocations Delegation revocation is an exceptional event that is not otherwise visible externally (eg, no network traffic is emitted). Generate a trace record when it occurs so that revocation can be observed or other activity can be triggered. Example: nfsd-1104 [005] 1912.002544: nfsd_stid_revoke: client 633c9343:4e82788d stateid 00000003:00000001 ref=2 type=DELEG Trace infrastructure is provided for subsequent additional tracing related to nfs4_stid activity. Signed-off-by: Chuck Lever Tested-by: Jeff Layton Reviewed-by: Jeff Layton --- fs/nfsd/nfs4state.c | 2 ++ fs/nfsd/trace.h | 55 +++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 57 insertions(+) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 9ec66611a458b..7c131cac2705b 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -1366,6 +1366,8 @@ static void revoke_delegation(struct nfs4_delegation *dp) WARN_ON(!list_empty(&dp->dl_recall_lru)); + trace_nfsd_stid_revoke(&dp->dl_stid); + if (clp->cl_minorversion) { dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; refcount_inc(&dp->dl_stid.sc_count); diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h index 00908f75e0a6a..b648db4d03460 100644 --- a/fs/nfsd/trace.h +++ b/fs/nfsd/trace.h @@ -637,6 +637,61 @@ DEFINE_EVENT(nfsd_stateseqid_class, nfsd_##name, \ DEFINE_STATESEQID_EVENT(preprocess); DEFINE_STATESEQID_EVENT(open_confirm); +TRACE_DEFINE_ENUM(NFS4_OPEN_STID); +TRACE_DEFINE_ENUM(NFS4_LOCK_STID); +TRACE_DEFINE_ENUM(NFS4_DELEG_STID); +TRACE_DEFINE_ENUM(NFS4_CLOSED_STID); +TRACE_DEFINE_ENUM(NFS4_REVOKED_DELEG_STID); +TRACE_DEFINE_ENUM(NFS4_CLOSED_DELEG_STID); +TRACE_DEFINE_ENUM(NFS4_LAYOUT_STID); + +#define show_stid_type(x) \ + __print_flags(x, "|", \ + { NFS4_OPEN_STID, "OPEN" }, \ + { NFS4_LOCK_STID, "LOCK" }, \ + { NFS4_DELEG_STID, "DELEG" }, \ + { NFS4_CLOSED_STID, "CLOSED" }, \ + { NFS4_REVOKED_DELEG_STID, "REVOKED" }, \ + { NFS4_CLOSED_DELEG_STID, "CLOSED_DELEG" }, \ + { NFS4_LAYOUT_STID, "LAYOUT" }) + +DECLARE_EVENT_CLASS(nfsd_stid_class, + TP_PROTO( + const struct nfs4_stid *stid + ), + TP_ARGS(stid), + TP_STRUCT__entry( + __field(unsigned long, sc_type) + __field(int, sc_count) + __field(u32, cl_boot) + __field(u32, cl_id) + __field(u32, si_id) + __field(u32, si_generation) + ), + TP_fast_assign( + const stateid_t *stp = &stid->sc_stateid; + + __entry->sc_type = stid->sc_type; + __entry->sc_count = refcount_read(&stid->sc_count); + __entry->cl_boot = stp->si_opaque.so_clid.cl_boot; + __entry->cl_id = stp->si_opaque.so_clid.cl_id; + __entry->si_id = stp->si_opaque.so_id; + __entry->si_generation = stp->si_generation; + ), + TP_printk("client %08x:%08x stateid %08x:%08x ref=%d type=%s", + __entry->cl_boot, __entry->cl_id, + __entry->si_id, __entry->si_generation, + __entry->sc_count, show_stid_type(__entry->sc_type) + ) +); + +#define DEFINE_STID_EVENT(name) \ +DEFINE_EVENT(nfsd_stid_class, nfsd_stid_##name, \ + TP_PROTO(const struct nfs4_stid *stid), \ + TP_ARGS(stid)) + +DEFINE_STID_EVENT(revoke); + DECLARE_EVENT_CLASS(nfsd_clientid_class, TP_PROTO(const clientid_t *clid), TP_ARGS(clid), From b48f8056c034f28dd54668399f1d22be421b0bef Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Fri, 28 Oct 2022 10:47:16 -0400 Subject: [PATCH 18/49] NFSD: Use const pointers as parameters to fh_ helpers Enable callers to use const pointers where they are able to. Signed-off-by: Chuck Lever Tested-by: Jeff Layton Reviewed-by: Jeff Layton Reviewed-by: NeilBrown --- fs/nfsd/nfsfh.h | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/fs/nfsd/nfsfh.h b/fs/nfsd/nfsfh.h index c3ae6414fc5cf..513e028b0bbee 100644 --- a/fs/nfsd/nfsfh.h +++ b/fs/nfsd/nfsfh.h @@ -220,7 +220,7 @@ __be32 fh_update(struct svc_fh *); void fh_put(struct svc_fh *); static __inline__ struct svc_fh * -fh_copy(struct svc_fh *dst, struct svc_fh *src) +fh_copy(struct svc_fh *dst, const struct svc_fh *src) { WARN_ON(src->fh_dentry); @@ -229,7 +229,7 @@ fh_copy(struct svc_fh *dst, struct svc_fh *src) } static inline void -fh_copy_shallow(struct knfsd_fh *dst, struct knfsd_fh *src) +fh_copy_shallow(struct knfsd_fh *dst, const struct knfsd_fh *src) { dst->fh_size = src->fh_size; memcpy(&dst->fh_raw, &src->fh_raw, src->fh_size); @@ -243,7 +243,8 @@ fh_init(struct svc_fh *fhp, int maxsize) return fhp; } -static inline bool fh_match(struct knfsd_fh *fh1, struct knfsd_fh *fh2) +static inline bool fh_match(const struct knfsd_fh *fh1, + const struct knfsd_fh *fh2) { if (fh1->fh_size != fh2->fh_size) return false; @@ -252,7 +253,8 @@ static inline bool fh_match(struct knfsd_fh *fh1, struct knfsd_fh *fh2) return true; } -static inline bool fh_fsid_match(struct knfsd_fh *fh1, struct knfsd_fh *fh2) +static inline bool fh_fsid_match(const struct knfsd_fh *fh1, + const struct knfsd_fh *fh2) { if (fh1->fh_fsid_type != fh2->fh_fsid_type) return false; From 3fe828caddd81e68e9d29353c6e9285a658ca056 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Fri, 28 Oct 2022 10:47:22 -0400 Subject: [PATCH 19/49] NFSD: Update file_hashtbl() helpers Enable callers to use const pointers for type safety. Signed-off-by: Chuck Lever Reviewed-by: NeilBrown Reviewed-by: Jeff Layton --- fs/nfsd/nfs4state.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 7c131cac2705b..baf03a31203c7 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -721,7 +721,7 @@ static unsigned int ownerstr_hashval(struct xdr_netobj *ownername) #define FILE_HASH_BITS 8 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) -static unsigned int file_hashval(struct svc_fh *fh) +static unsigned int file_hashval(const struct svc_fh *fh) { struct inode *inode = d_inode(fh->fh_dentry); @@ -4686,7 +4686,7 @@ move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net) /* search file_hashtbl[] for file */ static struct nfs4_file * -find_file_locked(struct svc_fh *fh, unsigned int hashval) +find_file_locked(const struct svc_fh *fh, unsigned int hashval) { struct nfs4_file *fp; From 81a21fa3e7fdecb3c5b97014f0fc5a17d5806cae Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Fri, 28 Oct 2022 10:47:28 -0400 Subject: [PATCH 20/49] NFSD: Clean up nfsd4_init_file() Name this function more consistently. I'm going to use nfsd4_file_ and nfsd4_file_hash_ for these helpers. Change the @fh parameter to be const pointer for better type safety. Finally, move the hash insertion operation to the caller. This is typical for most other "init_object" type helpers, and it is where most of the other nfs4_file hash table operations are located. Signed-off-by: Chuck Lever Reviewed-by: NeilBrown Reviewed-by: Jeff Layton --- fs/nfsd/nfs4state.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index baf03a31203c7..d63a4e5439c2f 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -4277,11 +4277,9 @@ static struct nfs4_file *nfsd4_alloc_file(void) } /* OPEN Share state helper functions */ -static void nfsd4_init_file(struct svc_fh *fh, unsigned int hashval, - struct nfs4_file *fp) -{ - lockdep_assert_held(&state_lock); +static void nfsd4_file_init(const struct svc_fh *fh, struct nfs4_file *fp) +{ refcount_set(&fp->fi_ref, 1); spin_lock_init(&fp->fi_lock); INIT_LIST_HEAD(&fp->fi_stateids); @@ -4299,7 +4297,6 @@ static void nfsd4_init_file(struct svc_fh *fh, unsigned int hashval, INIT_LIST_HEAD(&fp->fi_lo_states); atomic_set(&fp->fi_lo_recalls, 0); #endif - hlist_add_head_rcu(&fp->fi_hash, &file_hashtbl[hashval]); } void @@ -4717,7 +4714,8 @@ static struct nfs4_file *insert_file(struct nfs4_file *new, struct svc_fh *fh, fp->fi_aliased = alias_found = true; } if (likely(ret == NULL)) { - nfsd4_init_file(fh, hashval, new); + nfsd4_file_init(fh, new); + hlist_add_head_rcu(&new->fi_hash, &file_hashtbl[hashval]); new->fi_aliased = alias_found; ret = new; } From 3341678f2fd6106055cead09e513fad6950a0d19 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Fri, 28 Oct 2022 10:47:34 -0400 Subject: [PATCH 21/49] NFSD: Add a nfsd4_file_hash_remove() helper Refactor to relocate hash deletion operation to a helper function that is close to most other nfs4_file data structure operations. The "noinline" annotation will become useful in a moment when the hlist_del_rcu() is replaced with a more complex rhash remove operation. It also guarantees that hash remove operations can be traced with "-p function -l remove_nfs4_file_locked". This also simplifies the organization of forward declarations: the to-be-added rhashtable and its param structure will be defined /after/ put_nfs4_file(). Signed-off-by: Chuck Lever Reviewed-by: NeilBrown Reviewed-by: Jeff Layton --- fs/nfsd/nfs4state.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index d63a4e5439c2f..fb70cab33887d 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -84,6 +84,7 @@ static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) static void nfs4_free_ol_stateid(struct nfs4_stid *stid); void nfsd4_end_grace(struct nfsd_net *nn); static void _free_cpntf_state_locked(struct nfsd_net *nn, struct nfs4_cpntf_state *cps); +static void nfsd4_file_hash_remove(struct nfs4_file *fi); /* Locking: */ @@ -591,7 +592,7 @@ put_nfs4_file(struct nfs4_file *fi) might_lock(&state_lock); if (refcount_dec_and_lock(&fi->fi_ref, &state_lock)) { - hlist_del_rcu(&fi->fi_hash); + nfsd4_file_hash_remove(fi); spin_unlock(&state_lock); WARN_ON_ONCE(!list_empty(&fi->fi_clnt_odstate)); WARN_ON_ONCE(!list_empty(&fi->fi_delegations)); @@ -4749,6 +4750,11 @@ find_or_add_file(struct nfs4_file *new, struct svc_fh *fh) return insert_file(new, fh, hashval); } +static noinline_for_stack void nfsd4_file_hash_remove(struct nfs4_file *fi) +{ + hlist_del_rcu(&fi->fi_hash); +} + /* * Called to check deny when READ with all zero stateid or * WRITE with all zero or all one stateid From 9270fc514ba7d415636b23bcb937573a1ce54f6a Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Fri, 28 Oct 2022 10:47:41 -0400 Subject: [PATCH 22/49] NFSD: Clean up find_or_add_file() Remove the call to find_file_locked() in insert_nfs4_file(). Tracing shows that over 99% of these calls return NULL. Thus it is not worth the expense of the extra bucket list traversal. insert_file() already deals correctly with the case where the item is already in the hash bucket. Since nfsd4_file_hash_insert() is now just a wrapper around insert_file(), move the meat of insert_file() into nfsd4_file_hash_insert() and get rid of it. Signed-off-by: Chuck Lever Reviewed-by: NeilBrown --- fs/nfsd/nfs4state.c | 64 ++++++++++++++++++++------------------------- 1 file changed, 28 insertions(+), 36 deletions(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index fb70cab33887d..d63ce21180428 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -4698,24 +4698,42 @@ find_file_locked(const struct svc_fh *fh, unsigned int hashval) return NULL; } -static struct nfs4_file *insert_file(struct nfs4_file *new, struct svc_fh *fh, - unsigned int hashval) +static struct nfs4_file * find_file(struct svc_fh *fh) { struct nfs4_file *fp; + unsigned int hashval = file_hashval(fh); + + rcu_read_lock(); + fp = find_file_locked(fh, hashval); + rcu_read_unlock(); + return fp; +} + +/* + * On hash insertion, identify entries with the same inode but + * distinct filehandles. They will all be in the same hash bucket + * because nfs4_file's are hashed by the address in the fi_inode + * field. + */ +static noinline_for_stack struct nfs4_file * +nfsd4_file_hash_insert(struct nfs4_file *new, const struct svc_fh *fhp) +{ + unsigned int hashval = file_hashval(fhp); struct nfs4_file *ret = NULL; bool alias_found = false; + struct nfs4_file *fi; spin_lock(&state_lock); - hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash, + hlist_for_each_entry_rcu(fi, &file_hashtbl[hashval], fi_hash, lockdep_is_held(&state_lock)) { - if (fh_match(&fp->fi_fhandle, &fh->fh_handle)) { - if (refcount_inc_not_zero(&fp->fi_ref)) - ret = fp; - } else if (d_inode(fh->fh_dentry) == fp->fi_inode) - fp->fi_aliased = alias_found = true; + if (fh_match(&fi->fi_fhandle, &fhp->fh_handle)) { + if (refcount_inc_not_zero(&fi->fi_ref)) + ret = fi; + } else if (d_inode(fhp->fh_dentry) == fi->fi_inode) + fi->fi_aliased = alias_found = true; } if (likely(ret == NULL)) { - nfsd4_file_init(fh, new); + nfsd4_file_init(fhp, new); hlist_add_head_rcu(&new->fi_hash, &file_hashtbl[hashval]); new->fi_aliased = alias_found; ret = new; @@ -4724,32 +4742,6 @@ static struct nfs4_file *insert_file(struct nfs4_file *new, struct svc_fh *fh, return ret; } -static struct nfs4_file * find_file(struct svc_fh *fh) -{ - struct nfs4_file *fp; - unsigned int hashval = file_hashval(fh); - - rcu_read_lock(); - fp = find_file_locked(fh, hashval); - rcu_read_unlock(); - return fp; -} - -static struct nfs4_file * -find_or_add_file(struct nfs4_file *new, struct svc_fh *fh) -{ - struct nfs4_file *fp; - unsigned int hashval = file_hashval(fh); - - rcu_read_lock(); - fp = find_file_locked(fh, hashval); - rcu_read_unlock(); - if (fp) - return fp; - - return insert_file(new, fh, hashval); -} - static noinline_for_stack void nfsd4_file_hash_remove(struct nfs4_file *fi) { hlist_del_rcu(&fi->fi_hash); @@ -5641,7 +5633,7 @@ nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nf * and check for delegations in the process of being recalled. * If not found, create the nfs4_file struct */ - fp = find_or_add_file(open->op_file, current_fh); + fp = nfsd4_file_hash_insert(open->op_file, current_fh); if (fp != open->op_file) { status = nfs4_check_deleg(cl, open, &dp); if (status) From 15424748001a9b5ea62b3e6ad45f0a8b27f01df9 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Fri, 28 Oct 2022 10:47:47 -0400 Subject: [PATCH 23/49] NFSD: Refactor find_file() find_file() is now the only caller of find_file_locked(), so just fold these two together. Signed-off-by: Chuck Lever Reviewed-by: NeilBrown Reviewed-by: Jeff Layton --- fs/nfsd/nfs4state.c | 36 +++++++++++++++--------------------- 1 file changed, 15 insertions(+), 21 deletions(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index d63ce21180428..a611e7b0f0130 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -4682,31 +4682,24 @@ move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net) nfs4_put_stid(&last->st_stid); } -/* search file_hashtbl[] for file */ -static struct nfs4_file * -find_file_locked(const struct svc_fh *fh, unsigned int hashval) +static noinline_for_stack struct nfs4_file * +nfsd4_file_hash_lookup(const struct svc_fh *fhp) { - struct nfs4_file *fp; + unsigned int hashval = file_hashval(fhp); + struct nfs4_file *fi; - hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash, - lockdep_is_held(&state_lock)) { - if (fh_match(&fp->fi_fhandle, &fh->fh_handle)) { - if (refcount_inc_not_zero(&fp->fi_ref)) - return fp; + rcu_read_lock(); + hlist_for_each_entry_rcu(fi, &file_hashtbl[hashval], fi_hash, + lockdep_is_held(&state_lock)) { + if (fh_match(&fi->fi_fhandle, &fhp->fh_handle)) { + if (refcount_inc_not_zero(&fi->fi_ref)) { + rcu_read_unlock(); + return fi; + } } } - return NULL; -} - -static struct nfs4_file * find_file(struct svc_fh *fh) -{ - struct nfs4_file *fp; - unsigned int hashval = file_hashval(fh); - - rcu_read_lock(); - fp = find_file_locked(fh, hashval); rcu_read_unlock(); - return fp; + return NULL; } /* @@ -4757,9 +4750,10 @@ nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) struct nfs4_file *fp; __be32 ret = nfs_ok; - fp = find_file(current_fh); + fp = nfsd4_file_hash_lookup(current_fh); if (!fp) return ret; + /* Check for conflicting share reservations */ spin_lock(&fp->fi_lock); if (fp->fi_share_deny & deny_type) From d47b295e8d76a4d69f0e2ea0cd8a79c9d3488280 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Fri, 28 Oct 2022 10:47:53 -0400 Subject: [PATCH 24/49] NFSD: Use rhashtable for managing nfs4_file objects fh_match() is costly, especially when filehandles are large (as is the case for NFSv4). It needs to be used sparingly when searching data structures. Unfortunately, with common workloads, I see multiple thousands of objects stored in file_hashtbl[], which has just 256 buckets, making its bucket hash chains quite lengthy. Walking long hash chains with the state_lock held blocks other activity that needs that lock. Sizable hash chains are a common occurrance once the server has handed out some delegations, for example -- IIUC, each delegated file is held open on the server by an nfs4_file object. To help mitigate the cost of searching with fh_match(), replace the nfs4_file hash table with an rhashtable, which can dynamically resize its bucket array to minimize hash chain length. The result of this modification is an improvement in the latency of NFSv4 operations, and the reduction of nfsd CPU utilization due to eliminating the cost of multiple calls to fh_match() and reducing the CPU cache misses incurred while walking long hash chains in the nfs4_file hash table. Signed-off-by: Chuck Lever Reviewed-by: NeilBrown Reviewed-by: Jeff Layton --- fs/nfsd/nfs4state.c | 97 +++++++++++++++++++++++++++++---------------- fs/nfsd/state.h | 5 +-- 2 files changed, 63 insertions(+), 39 deletions(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index a611e7b0f0130..2ec981fd2985d 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -44,7 +44,9 @@ #include #include #include +#include #include + #include "xdr4.h" #include "xdr4cb.h" #include "vfs.h" @@ -589,11 +591,8 @@ static void nfsd4_free_file_rcu(struct rcu_head *rcu) void put_nfs4_file(struct nfs4_file *fi) { - might_lock(&state_lock); - - if (refcount_dec_and_lock(&fi->fi_ref, &state_lock)) { + if (refcount_dec_and_test(&fi->fi_ref)) { nfsd4_file_hash_remove(fi); - spin_unlock(&state_lock); WARN_ON_ONCE(!list_empty(&fi->fi_clnt_odstate)); WARN_ON_ONCE(!list_empty(&fi->fi_delegations)); call_rcu(&fi->fi_rcu, nfsd4_free_file_rcu); @@ -718,19 +717,20 @@ static unsigned int ownerstr_hashval(struct xdr_netobj *ownername) return ret & OWNER_HASH_MASK; } -/* hash table for nfs4_file */ -#define FILE_HASH_BITS 8 -#define FILE_HASH_SIZE (1 << FILE_HASH_BITS) - -static unsigned int file_hashval(const struct svc_fh *fh) -{ - struct inode *inode = d_inode(fh->fh_dentry); +static struct rhltable nfs4_file_rhltable ____cacheline_aligned_in_smp; - /* XXX: why not (here & in file cache) use inode? */ - return (unsigned int)hash_long(inode->i_ino, FILE_HASH_BITS); -} +static const struct rhashtable_params nfs4_file_rhash_params = { + .key_len = sizeof_field(struct nfs4_file, fi_inode), + .key_offset = offsetof(struct nfs4_file, fi_inode), + .head_offset = offsetof(struct nfs4_file, fi_rlist), -static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; + /* + * Start with a single page hash table to reduce resizing churn + * on light workloads. + */ + .min_size = 256, + .automatic_shrinking = true, +}; /* * Check if courtesy clients have conflicting access and resolve it if possible @@ -4685,12 +4685,14 @@ move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net) static noinline_for_stack struct nfs4_file * nfsd4_file_hash_lookup(const struct svc_fh *fhp) { - unsigned int hashval = file_hashval(fhp); + struct inode *inode = d_inode(fhp->fh_dentry); + struct rhlist_head *tmp, *list; struct nfs4_file *fi; rcu_read_lock(); - hlist_for_each_entry_rcu(fi, &file_hashtbl[hashval], fi_hash, - lockdep_is_held(&state_lock)) { + list = rhltable_lookup(&nfs4_file_rhltable, &inode, + nfs4_file_rhash_params); + rhl_for_each_entry_rcu(fi, tmp, list, fi_rlist) { if (fh_match(&fi->fi_fhandle, &fhp->fh_handle)) { if (refcount_inc_not_zero(&fi->fi_ref)) { rcu_read_unlock(); @@ -4704,40 +4706,56 @@ nfsd4_file_hash_lookup(const struct svc_fh *fhp) /* * On hash insertion, identify entries with the same inode but - * distinct filehandles. They will all be in the same hash bucket - * because nfs4_file's are hashed by the address in the fi_inode - * field. + * distinct filehandles. They will all be on the list returned + * by rhltable_lookup(). + * + * inode->i_lock prevents racing insertions from adding an entry + * for the same inode/fhp pair twice. */ static noinline_for_stack struct nfs4_file * nfsd4_file_hash_insert(struct nfs4_file *new, const struct svc_fh *fhp) { - unsigned int hashval = file_hashval(fhp); + struct inode *inode = d_inode(fhp->fh_dentry); + struct rhlist_head *tmp, *list; struct nfs4_file *ret = NULL; bool alias_found = false; struct nfs4_file *fi; + int err; - spin_lock(&state_lock); - hlist_for_each_entry_rcu(fi, &file_hashtbl[hashval], fi_hash, - lockdep_is_held(&state_lock)) { + rcu_read_lock(); + spin_lock(&inode->i_lock); + + list = rhltable_lookup(&nfs4_file_rhltable, &inode, + nfs4_file_rhash_params); + rhl_for_each_entry_rcu(fi, tmp, list, fi_rlist) { if (fh_match(&fi->fi_fhandle, &fhp->fh_handle)) { if (refcount_inc_not_zero(&fi->fi_ref)) ret = fi; - } else if (d_inode(fhp->fh_dentry) == fi->fi_inode) + } else fi->fi_aliased = alias_found = true; } - if (likely(ret == NULL)) { - nfsd4_file_init(fhp, new); - hlist_add_head_rcu(&new->fi_hash, &file_hashtbl[hashval]); - new->fi_aliased = alias_found; - ret = new; - } - spin_unlock(&state_lock); + if (ret) + goto out_unlock; + + nfsd4_file_init(fhp, new); + err = rhltable_insert(&nfs4_file_rhltable, &new->fi_rlist, + nfs4_file_rhash_params); + if (err) + goto out_unlock; + + new->fi_aliased = alias_found; + ret = new; + +out_unlock: + spin_unlock(&inode->i_lock); + rcu_read_unlock(); return ret; } static noinline_for_stack void nfsd4_file_hash_remove(struct nfs4_file *fi) { - hlist_del_rcu(&fi->fi_hash); + rhltable_remove(&nfs4_file_rhltable, &fi->fi_rlist, + nfs4_file_rhash_params); } /* @@ -5628,6 +5646,8 @@ nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nf * If not found, create the nfs4_file struct */ fp = nfsd4_file_hash_insert(open->op_file, current_fh); + if (unlikely(!fp)) + return nfserr_jukebox; if (fp != open->op_file) { status = nfs4_check_deleg(cl, open, &dp); if (status) @@ -8042,10 +8062,16 @@ nfs4_state_start(void) { int ret; - ret = nfsd4_create_callback_queue(); + ret = rhltable_init(&nfs4_file_rhltable, &nfs4_file_rhash_params); if (ret) return ret; + ret = nfsd4_create_callback_queue(); + if (ret) { + rhltable_destroy(&nfs4_file_rhltable); + return ret; + } + set_max_delegations(); return 0; } @@ -8076,6 +8102,7 @@ nfs4_state_shutdown_net(struct net *net) nfsd4_client_tracking_exit(net); nfs4_state_destroy_net(net); + rhltable_destroy(&nfs4_file_rhltable); #ifdef CONFIG_NFSD_V4_2_INTER_SSC nfsd4_ssc_shutdown_umount(nn); #endif diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h index e2daef3cc0034..eadd7f465bf52 100644 --- a/fs/nfsd/state.h +++ b/fs/nfsd/state.h @@ -536,16 +536,13 @@ struct nfs4_clnt_odstate { * inode can have multiple filehandles associated with it, so there is * (potentially) a many to one relationship between this struct and struct * inode. - * - * These are hashed by filehandle in the file_hashtbl, which is protected by - * the global state_lock spinlock. */ struct nfs4_file { refcount_t fi_ref; struct inode * fi_inode; bool fi_aliased; spinlock_t fi_lock; - struct hlist_node fi_hash; /* hash on fi_fhandle */ + struct rhlist_head fi_rlist; struct list_head fi_stateids; union { struct list_head fi_delegations; From 3f054211b29c0fa06dfdcab402c795fd7e906be1 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Mon, 31 Oct 2022 09:53:26 -0400 Subject: [PATCH 25/49] NFSD: Fix licensing header in filecache.c Add a missing SPDX header. Signed-off-by: Chuck Lever Reviewed-by: Jeff Layton --- fs/nfsd/filecache.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c index 897dd47ffb0a4..deab9b765c880 100644 --- a/fs/nfsd/filecache.c +++ b/fs/nfsd/filecache.c @@ -1,5 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0 /* - * Open file cache. + * The NFSD open file cache. * * (c) 2015 - Jeff Layton * From 296f3d7f419e02d676761aff06502fa005e13b52 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Mon, 31 Oct 2022 10:01:30 -0400 Subject: [PATCH 26/49] MAINTAINERS: NFSD should be responsible for fs/exportfs We recently received a patch for fs/exportfs/expfs.c, but there isn't a subsystem maintainer listed for fs/exportfs: Christian Brauner (commit_signer:2/2=100%,authored:1/2=50%,added_lines:3/6=50%,removed_lines:2/6=33%) Al Viro (commit_signer:1/2=50%,authored:1/2=50%,added_lines:3/6=50%,removed_lines:4/6=67%) Miklos Szeredi (commit_signer:1/2=50%) Amir Goldstein (commit_signer:1/2=50%) linux-kernel@vger.kernel.org (open list) Neil says: > Looking at recent commits, patches come in through multiple > different trees. > nfsd certainly has an interest in expfs.c. The only other user is > name_to_handle/open_by_handle API. > I see it as primarily nfsd functionality which is useful enough to > be exported directly to user-space. > (It was created by me when I was nfsd maintainer - does that > count?) Suggested-by: Neil Brown Signed-off-by: Chuck Lever Acked-by: Jeff Layton --- MAINTAINERS | 1 + 1 file changed, 1 insertion(+) diff --git a/MAINTAINERS b/MAINTAINERS index 69565ac0c2244..50aa3ee8df38b 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -11134,6 +11134,7 @@ L: linux-nfs@vger.kernel.org S: Supported W: http://nfs.sourceforge.net/ T: git git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux.git +F: fs/exportfs/ F: fs/lockd/ F: fs/nfs_common/ F: fs/nfsd/ From 1f696e230ea5198e393368b319eb55651828d687 Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Wed, 2 Nov 2022 14:44:47 -0400 Subject: [PATCH 27/49] nfsd: remove the pages_flushed statistic from filecache We're counting mapping->nrpages, but not all of those are necessarily dirty. We don't really have a simple way to count just the dirty pages, so just remove this stat since it's not accurate. Signed-off-by: Jeff Layton Signed-off-by: Chuck Lever --- fs/nfsd/filecache.c | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-) diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c index deab9b765c880..2d543a4528586 100644 --- a/fs/nfsd/filecache.c +++ b/fs/nfsd/filecache.c @@ -58,7 +58,6 @@ static DEFINE_PER_CPU(unsigned long, nfsd_file_cache_hits); static DEFINE_PER_CPU(unsigned long, nfsd_file_acquisitions); static DEFINE_PER_CPU(unsigned long, nfsd_file_releases); static DEFINE_PER_CPU(unsigned long, nfsd_file_total_age); -static DEFINE_PER_CPU(unsigned long, nfsd_file_pages_flushed); static DEFINE_PER_CPU(unsigned long, nfsd_file_evictions); struct nfsd_fcache_disposal { @@ -396,7 +395,6 @@ nfsd_file_flush(struct nfsd_file *nf) if (!file || !(file->f_mode & FMODE_WRITE)) return; - this_cpu_add(nfsd_file_pages_flushed, file->f_mapping->nrpages); if (vfs_fsync(file, 1) != 0) nfsd_reset_write_verifier(net_generic(nf->nf_net, nfsd_net_id)); } @@ -1023,7 +1021,6 @@ nfsd_file_cache_shutdown(void) per_cpu(nfsd_file_acquisitions, i) = 0; per_cpu(nfsd_file_releases, i) = 0; per_cpu(nfsd_file_total_age, i) = 0; - per_cpu(nfsd_file_pages_flushed, i) = 0; per_cpu(nfsd_file_evictions, i) = 0; } } @@ -1238,7 +1235,7 @@ nfsd_file_create(struct svc_rqst *rqstp, struct svc_fh *fhp, */ int nfsd_file_cache_stats_show(struct seq_file *m, void *v) { - unsigned long releases = 0, pages_flushed = 0, evictions = 0; + unsigned long releases = 0, evictions = 0; unsigned long hits = 0, acquisitions = 0; unsigned int i, count = 0, buckets = 0; unsigned long lru = 0, total_age = 0; @@ -1266,7 +1263,6 @@ int nfsd_file_cache_stats_show(struct seq_file *m, void *v) releases += per_cpu(nfsd_file_releases, i); total_age += per_cpu(nfsd_file_total_age, i); evictions += per_cpu(nfsd_file_evictions, i); - pages_flushed += per_cpu(nfsd_file_pages_flushed, i); } seq_printf(m, "total entries: %u\n", count); @@ -1280,6 +1276,5 @@ int nfsd_file_cache_stats_show(struct seq_file *m, void *v) seq_printf(m, "mean age (ms): %ld\n", total_age / releases); else seq_printf(m, "mean age (ms): -\n"); - seq_printf(m, "pages flushed: %lu\n", pages_flushed); return 0; } From 8214118589881b2d390284410c5ff275e7a5e03c Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Wed, 2 Nov 2022 14:44:48 -0400 Subject: [PATCH 28/49] nfsd: reorganize filecache.c In a coming patch, we're going to rework how the filecache refcounting works. Move some code around in the function to reduce the churn in the later patches, and rename some of the functions with (hopefully) clearer names: nfsd_file_flush becomes nfsd_file_fsync, and nfsd_file_unhash_and_dispose is renamed to nfsd_file_unhash_and_queue. Also, the nfsd_file_put_final tracepoint is renamed to nfsd_file_free, to better match the name of the function from which it's called. Signed-off-by: Jeff Layton Reviewed-by: NeilBrown Signed-off-by: Chuck Lever --- fs/nfsd/filecache.c | 111 ++++++++++++++++++++++---------------------- fs/nfsd/trace.h | 4 +- 2 files changed, 58 insertions(+), 57 deletions(-) diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c index 2d543a4528586..1418bc889aa08 100644 --- a/fs/nfsd/filecache.c +++ b/fs/nfsd/filecache.c @@ -335,16 +335,59 @@ nfsd_file_alloc(struct nfsd_file_lookup_key *key, unsigned int may) return nf; } +static void +nfsd_file_fsync(struct nfsd_file *nf) +{ + struct file *file = nf->nf_file; + + if (!file || !(file->f_mode & FMODE_WRITE)) + return; + if (vfs_fsync(file, 1) != 0) + nfsd_reset_write_verifier(net_generic(nf->nf_net, nfsd_net_id)); +} + +static int +nfsd_file_check_write_error(struct nfsd_file *nf) +{ + struct file *file = nf->nf_file; + + if (!file || !(file->f_mode & FMODE_WRITE)) + return 0; + return filemap_check_wb_err(file->f_mapping, READ_ONCE(file->f_wb_err)); +} + +static void +nfsd_file_hash_remove(struct nfsd_file *nf) +{ + trace_nfsd_file_unhash(nf); + + if (nfsd_file_check_write_error(nf)) + nfsd_reset_write_verifier(net_generic(nf->nf_net, nfsd_net_id)); + rhashtable_remove_fast(&nfsd_file_rhash_tbl, &nf->nf_rhash, + nfsd_file_rhash_params); +} + +static bool +nfsd_file_unhash(struct nfsd_file *nf) +{ + if (test_and_clear_bit(NFSD_FILE_HASHED, &nf->nf_flags)) { + nfsd_file_hash_remove(nf); + return true; + } + return false; +} + static bool nfsd_file_free(struct nfsd_file *nf) { s64 age = ktime_to_ms(ktime_sub(ktime_get(), nf->nf_birthtime)); bool flush = false; + trace_nfsd_file_free(nf); + this_cpu_inc(nfsd_file_releases); this_cpu_add(nfsd_file_total_age, age); - trace_nfsd_file_put_final(nf); if (nf->nf_mark) nfsd_file_mark_put(nf->nf_mark); if (nf->nf_file) { @@ -378,27 +421,6 @@ nfsd_file_check_writeback(struct nfsd_file *nf) mapping_tagged(mapping, PAGECACHE_TAG_WRITEBACK); } -static int -nfsd_file_check_write_error(struct nfsd_file *nf) -{ - struct file *file = nf->nf_file; - - if (!file || !(file->f_mode & FMODE_WRITE)) - return 0; - return filemap_check_wb_err(file->f_mapping, READ_ONCE(file->f_wb_err)); -} - -static void -nfsd_file_flush(struct nfsd_file *nf) -{ - struct file *file = nf->nf_file; - - if (!file || !(file->f_mode & FMODE_WRITE)) - return; - if (vfs_fsync(file, 1) != 0) - nfsd_reset_write_verifier(net_generic(nf->nf_net, nfsd_net_id)); -} - static void nfsd_file_lru_add(struct nfsd_file *nf) { set_bit(NFSD_FILE_REFERENCED, &nf->nf_flags); @@ -412,31 +434,18 @@ static void nfsd_file_lru_remove(struct nfsd_file *nf) trace_nfsd_file_lru_del(nf); } -static void -nfsd_file_hash_remove(struct nfsd_file *nf) -{ - trace_nfsd_file_unhash(nf); - - if (nfsd_file_check_write_error(nf)) - nfsd_reset_write_verifier(net_generic(nf->nf_net, nfsd_net_id)); - rhashtable_remove_fast(&nfsd_file_rhash_tbl, &nf->nf_rhash, - nfsd_file_rhash_params); -} - -static bool -nfsd_file_unhash(struct nfsd_file *nf) +struct nfsd_file * +nfsd_file_get(struct nfsd_file *nf) { - if (test_and_clear_bit(NFSD_FILE_HASHED, &nf->nf_flags)) { - nfsd_file_hash_remove(nf); - return true; - } - return false; + if (likely(refcount_inc_not_zero(&nf->nf_ref))) + return nf; + return NULL; } static void -nfsd_file_unhash_and_dispose(struct nfsd_file *nf, struct list_head *dispose) +nfsd_file_unhash_and_queue(struct nfsd_file *nf, struct list_head *dispose) { - trace_nfsd_file_unhash_and_dispose(nf); + trace_nfsd_file_unhash_and_queue(nf); if (nfsd_file_unhash(nf)) { /* caller must call nfsd_file_dispose_list() later */ nfsd_file_lru_remove(nf); @@ -474,7 +483,7 @@ nfsd_file_put(struct nfsd_file *nf) nfsd_file_unhash_and_put(nf); if (!test_bit(NFSD_FILE_HASHED, &nf->nf_flags)) { - nfsd_file_flush(nf); + nfsd_file_fsync(nf); nfsd_file_put_noref(nf); } else if (nf->nf_file && test_bit(NFSD_FILE_GC, &nf->nf_flags)) { nfsd_file_put_noref(nf); @@ -483,14 +492,6 @@ nfsd_file_put(struct nfsd_file *nf) nfsd_file_put_noref(nf); } -struct nfsd_file * -nfsd_file_get(struct nfsd_file *nf) -{ - if (likely(refcount_inc_not_zero(&nf->nf_ref))) - return nf; - return NULL; -} - static void nfsd_file_dispose_list(struct list_head *dispose) { @@ -499,7 +500,7 @@ nfsd_file_dispose_list(struct list_head *dispose) while(!list_empty(dispose)) { nf = list_first_entry(dispose, struct nfsd_file, nf_lru); list_del_init(&nf->nf_lru); - nfsd_file_flush(nf); + nfsd_file_fsync(nf); nfsd_file_put_noref(nf); } } @@ -513,7 +514,7 @@ nfsd_file_dispose_list_sync(struct list_head *dispose) while(!list_empty(dispose)) { nf = list_first_entry(dispose, struct nfsd_file, nf_lru); list_del_init(&nf->nf_lru); - nfsd_file_flush(nf); + nfsd_file_fsync(nf); if (!refcount_dec_and_test(&nf->nf_ref)) continue; if (nfsd_file_free(nf)) @@ -713,7 +714,7 @@ __nfsd_file_close_inode(struct inode *inode, struct list_head *dispose) nfsd_file_rhash_params); if (!nf) break; - nfsd_file_unhash_and_dispose(nf, dispose); + nfsd_file_unhash_and_queue(nf, dispose); count++; } while (1); rcu_read_unlock(); @@ -915,7 +916,7 @@ __nfsd_file_cache_purge(struct net *net) nf = rhashtable_walk_next(&iter); while (!IS_ERR_OR_NULL(nf)) { if (!net || nf->nf_net == net) - nfsd_file_unhash_and_dispose(nf, &dispose); + nfsd_file_unhash_and_queue(nf, &dispose); nf = rhashtable_walk_next(&iter); } diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h index b648db4d03460..0177cfa505564 100644 --- a/fs/nfsd/trace.h +++ b/fs/nfsd/trace.h @@ -906,10 +906,10 @@ DEFINE_EVENT(nfsd_file_class, name, \ TP_PROTO(struct nfsd_file *nf), \ TP_ARGS(nf)) -DEFINE_NFSD_FILE_EVENT(nfsd_file_put_final); +DEFINE_NFSD_FILE_EVENT(nfsd_file_free); DEFINE_NFSD_FILE_EVENT(nfsd_file_unhash); DEFINE_NFSD_FILE_EVENT(nfsd_file_put); -DEFINE_NFSD_FILE_EVENT(nfsd_file_unhash_and_dispose); +DEFINE_NFSD_FILE_EVENT(nfsd_file_unhash_and_queue); TRACE_EVENT(nfsd_file_alloc, TP_PROTO( From 22ae4c114f77b55a4c5036e8f70409a0799a08f8 Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Wed, 2 Nov 2022 14:44:50 -0400 Subject: [PATCH 29/49] nfsd: fix up the filecache laundrette scheduling We don't really care whether there are hashed entries when it comes to scheduling the laundrette. They might all be non-gc entries, after all. We only want to schedule it if there are entries on the LRU. Switch to using list_lru_count, and move the check into nfsd_file_gc_worker. The other callsite in nfsd_file_put doesn't need to count entries, since it only schedules the laundrette after adding an entry to the LRU. Signed-off-by: Jeff Layton Signed-off-by: Chuck Lever --- fs/nfsd/filecache.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c index 1418bc889aa08..da7c9cb12403d 100644 --- a/fs/nfsd/filecache.c +++ b/fs/nfsd/filecache.c @@ -211,12 +211,9 @@ static const struct rhashtable_params nfsd_file_rhash_params = { static void nfsd_file_schedule_laundrette(void) { - if ((atomic_read(&nfsd_file_rhash_tbl.nelems) == 0) || - test_bit(NFSD_FILE_CACHE_UP, &nfsd_file_flags) == 0) - return; - - queue_delayed_work(system_wq, &nfsd_filecache_laundrette, - NFSD_LAUNDRETTE_DELAY); + if (test_bit(NFSD_FILE_CACHE_UP, &nfsd_file_flags)) + queue_delayed_work(system_wq, &nfsd_filecache_laundrette, + NFSD_LAUNDRETTE_DELAY); } static void @@ -666,7 +663,8 @@ static void nfsd_file_gc_worker(struct work_struct *work) { nfsd_file_gc(); - nfsd_file_schedule_laundrette(); + if (list_lru_count(&nfsd_file_lru)) + nfsd_file_schedule_laundrette(); } static unsigned long From 3ed157d0d73f15b6574424dd068ca5f5a8560562 Mon Sep 17 00:00:00 2001 From: Li zeming Date: Fri, 4 Nov 2022 09:43:03 +0800 Subject: [PATCH 30/49] sunrpc: svc: Remove an unused static function svc_ungetu32() The svc_ungetu32 function is not used, you could remove it. Signed-off-by: Li zeming Signed-off-by: Chuck Lever --- include/linux/sunrpc/svc.h | 7 ------- 1 file changed, 7 deletions(-) diff --git a/include/linux/sunrpc/svc.h b/include/linux/sunrpc/svc.h index 0edd837d401d0..ed722dd33b466 100644 --- a/include/linux/sunrpc/svc.h +++ b/include/linux/sunrpc/svc.h @@ -220,13 +220,6 @@ static inline __be32 svc_getu32(struct kvec *iov) return val; } -static inline void svc_ungetu32(struct kvec *iov) -{ - __be32 *vp = (__be32 *)iov->iov_base; - iov->iov_base = (void *)(vp - 1); - iov->iov_len += sizeof(*vp); -} - static inline void svc_putu32(struct kvec *iov, __be32 val) { __be32 *vp = iov->iov_base + iov->iov_len; From d7064eaf688cfe454c50db9f59298463d80d403c Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Thu, 3 Nov 2022 16:22:48 -0400 Subject: [PATCH 31/49] NFSD: Add an nfsd_file_fsync tracepoint Add a tracepoint to capture the number of filecache-triggered fsync calls and which files needed it. Also, record when an fsync triggers a write verifier reset. Examples: <...>-97 [007] 262.505611: nfsd_file_free: inode=0xffff888171e08140 ref=0 flags=GC may=WRITE nf_file=0xffff8881373d2400 <...>-97 [007] 262.505612: nfsd_file_fsync: inode=0xffff888171e08140 ref=0 flags=GC may=WRITE nf_file=0xffff8881373d2400 ret=0 <...>-97 [007] 262.505623: nfsd_file_free: inode=0xffff888171e08dc0 ref=0 flags=GC may=WRITE nf_file=0xffff8881373d1e00 <...>-97 [007] 262.505624: nfsd_file_fsync: inode=0xffff888171e08dc0 ref=0 flags=GC may=WRITE nf_file=0xffff8881373d1e00 ret=0 Signed-off-by: Chuck Lever Reviewed-by: Jeff Layton --- fs/nfsd/filecache.c | 5 ++++- fs/nfsd/trace.h | 31 +++++++++++++++++++++++++++++++ 2 files changed, 35 insertions(+), 1 deletion(-) diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c index da7c9cb12403d..1998b4d5f692a 100644 --- a/fs/nfsd/filecache.c +++ b/fs/nfsd/filecache.c @@ -336,10 +336,13 @@ static void nfsd_file_fsync(struct nfsd_file *nf) { struct file *file = nf->nf_file; + int ret; if (!file || !(file->f_mode & FMODE_WRITE)) return; - if (vfs_fsync(file, 1) != 0) + ret = vfs_fsync(file, 1); + trace_nfsd_file_fsync(nf, ret); + if (ret) nfsd_reset_write_verifier(net_generic(nf->nf_net, nfsd_net_id)); } diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h index 0177cfa505564..33567b87cc6b6 100644 --- a/fs/nfsd/trace.h +++ b/fs/nfsd/trace.h @@ -1238,6 +1238,37 @@ DEFINE_EVENT(nfsd_file_lruwalk_class, name, \ DEFINE_NFSD_FILE_LRUWALK_EVENT(nfsd_file_gc_removed); DEFINE_NFSD_FILE_LRUWALK_EVENT(nfsd_file_shrinker_removed); +TRACE_EVENT(nfsd_file_fsync, + TP_PROTO( + const struct nfsd_file *nf, + int ret + ), + TP_ARGS(nf, ret), + TP_STRUCT__entry( + __field(void *, nf_inode) + __field(int, nf_ref) + __field(int, ret) + __field(unsigned long, nf_flags) + __field(unsigned char, nf_may) + __field(struct file *, nf_file) + ), + TP_fast_assign( + __entry->nf_inode = nf->nf_inode; + __entry->nf_ref = refcount_read(&nf->nf_ref); + __entry->ret = ret; + __entry->nf_flags = nf->nf_flags; + __entry->nf_may = nf->nf_may; + __entry->nf_file = nf->nf_file; + ), + TP_printk("inode=%p ref=%d flags=%s may=%s nf_file=%p ret=%d", + __entry->nf_inode, + __entry->nf_ref, + show_nf_flags(__entry->nf_flags), + show_nfsd_may_flags(__entry->nf_may), + __entry->nf_file, __entry->ret + ) +); + #include "cache.h" TRACE_DEFINE_ENUM(RC_DROPIT); From 18ebd35b61b4693a0ddc270b6d4f18def232e770 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sun, 6 Nov 2022 14:02:39 -0500 Subject: [PATCH 32/49] lockd: set other missing fields when unlocking files vfs_lock_file() expects the struct file_lock to be fully initialised by the caller. Re-exported NFSv3 has been seen to Oops if the fl_file field is NULL. Fixes: aec158242b87 ("lockd: set fl_owner when unlocking files") Signed-off-by: Trond Myklebust Reviewed-by: Jeff Layton Link: https://bugzilla.kernel.org/show_bug.cgi?id=216582 Signed-off-by: Chuck Lever --- fs/lockd/svcsubs.c | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-) diff --git a/fs/lockd/svcsubs.c b/fs/lockd/svcsubs.c index e1c4617de7714..3515f17eaf3fb 100644 --- a/fs/lockd/svcsubs.c +++ b/fs/lockd/svcsubs.c @@ -176,7 +176,7 @@ nlm_delete_file(struct nlm_file *file) } } -static int nlm_unlock_files(struct nlm_file *file, fl_owner_t owner) +static int nlm_unlock_files(struct nlm_file *file, const struct file_lock *fl) { struct file_lock lock; @@ -184,12 +184,15 @@ static int nlm_unlock_files(struct nlm_file *file, fl_owner_t owner) lock.fl_type = F_UNLCK; lock.fl_start = 0; lock.fl_end = OFFSET_MAX; - lock.fl_owner = owner; - if (file->f_file[O_RDONLY] && - vfs_lock_file(file->f_file[O_RDONLY], F_SETLK, &lock, NULL)) + lock.fl_owner = fl->fl_owner; + lock.fl_pid = fl->fl_pid; + lock.fl_flags = FL_POSIX; + + lock.fl_file = file->f_file[O_RDONLY]; + if (lock.fl_file && vfs_lock_file(lock.fl_file, F_SETLK, &lock, NULL)) goto out_err; - if (file->f_file[O_WRONLY] && - vfs_lock_file(file->f_file[O_WRONLY], F_SETLK, &lock, NULL)) + lock.fl_file = file->f_file[O_WRONLY]; + if (lock.fl_file && vfs_lock_file(lock.fl_file, F_SETLK, &lock, NULL)) goto out_err; return 0; out_err: @@ -226,7 +229,7 @@ nlm_traverse_locks(struct nlm_host *host, struct nlm_file *file, if (match(lockhost, host)) { spin_unlock(&flctx->flc_lock); - if (nlm_unlock_files(file, fl->fl_owner)) + if (nlm_unlock_files(file, fl)) return 1; goto again; } From 01d53a88c08951f88f2a42f1f1e6568928e0590e Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Mon, 7 Nov 2022 06:58:41 -0500 Subject: [PATCH 33/49] nfsd: return error if nfs4_setacl fails With the addition of POSIX ACLs to struct nfsd_attrs, we no longer return an error if setting the ACL fails. Ensure we return the na_aclerr error on SETATTR if there is one. Fixes: c0cbe70742f4 ("NFSD: add posix ACLs to struct nfsd_attrs") Cc: Neil Brown Reported-by: Yongcheng Yang Signed-off-by: Jeff Layton Signed-off-by: Chuck Lever --- fs/nfsd/nfs4proc.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index 6f7e0c5e62d2b..a6173677b7666 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -1135,6 +1135,8 @@ nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 0, (time64_t)0); if (!status) status = nfserrno(attrs.na_labelerr); + if (!status) + status = nfserrno(attrs.na_aclerr); out: nfsd_attrs_free(&attrs); fh_drop_write(&cstate->current_fh); From 85a0d0c9a58002ef7d1bf5e3ea630f4fbd42a4f0 Mon Sep 17 00:00:00 2001 From: Xiu Jianfeng Date: Fri, 11 Nov 2022 17:18:35 +0800 Subject: [PATCH 34/49] NFSD: Use struct_size() helper in alloc_session() Use struct_size() helper to simplify the code, no functional changes. Signed-off-by: Xiu Jianfeng Reviewed-by: Jeff Layton Signed-off-by: Chuck Lever --- fs/nfsd/nfs4state.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 2ec981fd2985d..97badca3135ee 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -1833,13 +1833,12 @@ static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, int numslots = fattrs->maxreqs; int slotsize = slot_bytes(fattrs); struct nfsd4_session *new; - int mem, i; + int i; - BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) - + sizeof(struct nfsd4_session) > PAGE_SIZE); - mem = numslots * sizeof(struct nfsd4_slot *); + BUILD_BUG_ON(struct_size(new, se_slots, NFSD_MAX_SLOTS_PER_SESSION) + > PAGE_SIZE); - new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); + new = kzalloc(struct_size(new, se_slots, numslots), GFP_KERNEL); if (!new) return NULL; /* allocate each struct nfsd4_slot and data cache in one piece */ From 75c7940d2a86d3f1b60a0a265478cb8fc887b970 Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Fri, 11 Nov 2022 14:36:36 -0500 Subject: [PATCH 35/49] lockd: set missing fl_flags field when retrieving args Signed-off-by: Jeff Layton Signed-off-by: Chuck Lever --- fs/lockd/svc4proc.c | 1 + fs/lockd/svcproc.c | 1 + 2 files changed, 2 insertions(+) diff --git a/fs/lockd/svc4proc.c b/fs/lockd/svc4proc.c index 284b019cb6529..b72023a6b4c16 100644 --- a/fs/lockd/svc4proc.c +++ b/fs/lockd/svc4proc.c @@ -52,6 +52,7 @@ nlm4svc_retrieve_args(struct svc_rqst *rqstp, struct nlm_args *argp, *filp = file; /* Set up the missing parts of the file_lock structure */ + lock->fl.fl_flags = FL_POSIX; lock->fl.fl_file = file->f_file[mode]; lock->fl.fl_pid = current->tgid; lock->fl.fl_start = (loff_t)lock->lock_start; diff --git a/fs/lockd/svcproc.c b/fs/lockd/svcproc.c index e35c05e278061..32784f508c810 100644 --- a/fs/lockd/svcproc.c +++ b/fs/lockd/svcproc.c @@ -77,6 +77,7 @@ nlmsvc_retrieve_args(struct svc_rqst *rqstp, struct nlm_args *argp, /* Set up the missing parts of the file_lock structure */ mode = lock_to_openmode(&lock->fl); + lock->fl.fl_flags = FL_POSIX; lock->fl.fl_file = file->f_file[mode]; lock->fl.fl_pid = current->tgid; lock->fl.fl_lmops = &nlmsvc_lock_operations; From 69efce009f7df888e1fede3cb2913690eb829f52 Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Fri, 11 Nov 2022 14:36:37 -0500 Subject: [PATCH 36/49] lockd: ensure we use the correct file descriptor when unlocking Shared locks are set on O_RDONLY descriptors and exclusive locks are set on O_WRONLY ones. nlmsvc_unlock however calls vfs_lock_file twice, once for each descriptor, but it doesn't reset fl_file. Ensure that it does. Signed-off-by: Jeff Layton Signed-off-by: Chuck Lever --- fs/lockd/svclock.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/fs/lockd/svclock.c b/fs/lockd/svclock.c index 9c1aa75441e1c..9eae99e08e699 100644 --- a/fs/lockd/svclock.c +++ b/fs/lockd/svclock.c @@ -659,11 +659,13 @@ nlmsvc_unlock(struct net *net, struct nlm_file *file, struct nlm_lock *lock) nlmsvc_cancel_blocked(net, file, lock); lock->fl.fl_type = F_UNLCK; - if (file->f_file[O_RDONLY]) - error = vfs_lock_file(file->f_file[O_RDONLY], F_SETLK, + lock->fl.fl_file = file->f_file[O_RDONLY]; + if (lock->fl.fl_file) + error = vfs_lock_file(lock->fl.fl_file, F_SETLK, &lock->fl, NULL); - if (file->f_file[O_WRONLY]) - error = vfs_lock_file(file->f_file[O_WRONLY], F_SETLK, + lock->fl.fl_file = file->f_file[O_WRONLY]; + if (lock->fl.fl_file) + error |= vfs_lock_file(lock->fl.fl_file, F_SETLK, &lock->fl, NULL); return (error < 0)? nlm_lck_denied_nolocks : nlm_granted; From 9f27783b4dd235ef3c8dbf69fc6322777450323c Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Fri, 11 Nov 2022 14:36:38 -0500 Subject: [PATCH 37/49] lockd: fix file selection in nlmsvc_cancel_blocked We currently do a lock_to_openmode call based on the arguments from the NLM_UNLOCK call, but that will always set the fl_type of the lock to F_UNLCK, and the O_RDONLY descriptor is always chosen. Fix it to use the file_lock from the block instead. Signed-off-by: Jeff Layton Signed-off-by: Chuck Lever --- fs/lockd/svclock.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/fs/lockd/svclock.c b/fs/lockd/svclock.c index 9eae99e08e699..4e30f3c509701 100644 --- a/fs/lockd/svclock.c +++ b/fs/lockd/svclock.c @@ -699,9 +699,10 @@ nlmsvc_cancel_blocked(struct net *net, struct nlm_file *file, struct nlm_lock *l block = nlmsvc_lookup_block(file, lock); mutex_unlock(&file->f_mutex); if (block != NULL) { - mode = lock_to_openmode(&lock->fl); - vfs_cancel_lock(block->b_file->f_file[mode], - &block->b_call->a_args.lock.fl); + struct file_lock *fl = &block->b_call->a_args.lock.fl; + + mode = lock_to_openmode(fl); + vfs_cancel_lock(block->b_file->f_file[mode], fl); status = nlmsvc_unlink_block(block); nlmsvc_release_block(block); } From 79a1d88a36f77374c77fd41a4386d8c2736b8704 Mon Sep 17 00:00:00 2001 From: Brian Foster Date: Wed, 16 Nov 2022 10:28:36 -0500 Subject: [PATCH 38/49] NFSD: pass range end to vfs_fsync_range() instead of count _nfsd_copy_file_range() calls vfs_fsync_range() with an offset and count (bytes written), but the former wants the start and end bytes of the range to sync. Fix it up. Fixes: eac0b17a77fb ("NFSD add vfs_fsync after async copy is done") Signed-off-by: Brian Foster Tested-by: Dai Ngo Signed-off-by: Chuck Lever --- fs/nfsd/nfs4proc.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index a6173677b7666..73ed32ad23a20 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -1642,6 +1642,7 @@ static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy, u64 src_pos = copy->cp_src_pos; u64 dst_pos = copy->cp_dst_pos; int status; + loff_t end; /* See RFC 7862 p.67: */ if (bytes_total == 0) @@ -1661,8 +1662,8 @@ static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy, /* for a non-zero asynchronous copy do a commit of data */ if (nfsd4_copy_is_async(copy) && copy->cp_res.wr_bytes_written > 0) { since = READ_ONCE(dst->f_wb_err); - status = vfs_fsync_range(dst, copy->cp_dst_pos, - copy->cp_res.wr_bytes_written, 0); + end = copy->cp_dst_pos + copy->cp_res.wr_bytes_written - 1; + status = vfs_fsync_range(dst, copy->cp_dst_pos, end, 0); if (!status) status = filemap_check_wb_err(dst->f_mapping, since); if (!status) From 247c01ff5f8d66e62a404c91733be52fecb8b7f6 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Mon, 14 Nov 2022 08:57:43 -0500 Subject: [PATCH 39/49] trace: Relocate event helper files Steven Rostedt says: > The include/trace/events/ directory should only hold files that > are to create events, not headers that hold helper functions. > > Can you please move them out of include/trace/events/ as that > directory is "special" in the creation of events. Signed-off-by: Chuck Lever Acked-by: Leon Romanovsky Acked-by: Steven Rostedt (Google) Acked-by: Anna Schumaker --- MAINTAINERS | 7 +++++++ drivers/infiniband/core/cm_trace.h | 2 +- drivers/infiniband/core/cma_trace.h | 2 +- fs/nfs/nfs4trace.h | 6 +++--- fs/nfs/nfstrace.h | 6 +++--- include/trace/events/rpcgss.h | 2 +- include/trace/events/rpcrdma.h | 4 ++-- include/trace/events/sunrpc.h | 2 +- include/trace/{events => misc}/fs.h | 0 include/trace/{events => misc}/nfs.h | 0 include/trace/{events => misc}/rdma.h | 0 include/trace/{events/sunrpc_base.h => misc/sunrpc.h} | 0 12 files changed, 19 insertions(+), 12 deletions(-) rename include/trace/{events => misc}/fs.h (100%) rename include/trace/{events => misc}/nfs.h (100%) rename include/trace/{events => misc}/rdma.h (100%) rename include/trace/{events/sunrpc_base.h => misc/sunrpc.h} (100%) diff --git a/MAINTAINERS b/MAINTAINERS index 50aa3ee8df38b..5e9b99dcd2ed4 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -10055,6 +10055,7 @@ F: drivers/infiniband/ F: include/rdma/ F: include/trace/events/ib_mad.h F: include/trace/events/ib_umad.h +F: include/trace/misc/rdma.h F: include/uapi/linux/if_infiniband.h F: include/uapi/rdma/ F: samples/bpf/ibumad_kern.c @@ -11140,6 +11141,12 @@ F: fs/nfs_common/ F: fs/nfsd/ F: include/linux/lockd/ F: include/linux/sunrpc/ +F: include/trace/events/rpcgss.h +F: include/trace/events/rpcrdma.h +F: include/trace/events/sunrpc.h +F: include/trace/misc/fs.h +F: include/trace/misc/nfs.h +F: include/trace/misc/sunrpc.h F: include/uapi/linux/nfsd/ F: include/uapi/linux/sunrpc/ F: net/sunrpc/ diff --git a/drivers/infiniband/core/cm_trace.h b/drivers/infiniband/core/cm_trace.h index e9d282679ef15..944d9071245d2 100644 --- a/drivers/infiniband/core/cm_trace.h +++ b/drivers/infiniband/core/cm_trace.h @@ -16,7 +16,7 @@ #include #include -#include +#include /* * enum ib_cm_state, from include/rdma/ib_cm.h diff --git a/drivers/infiniband/core/cma_trace.h b/drivers/infiniband/core/cma_trace.h index e45264267bcc9..47f3c6e4be893 100644 --- a/drivers/infiniband/core/cma_trace.h +++ b/drivers/infiniband/core/cma_trace.h @@ -15,7 +15,7 @@ #define _TRACE_RDMA_CMA_H #include -#include +#include DECLARE_EVENT_CLASS(cma_fsm_class, diff --git a/fs/nfs/nfs4trace.h b/fs/nfs/nfs4trace.h index 2cff5901c6894..633cc64a04daf 100644 --- a/fs/nfs/nfs4trace.h +++ b/fs/nfs/nfs4trace.h @@ -9,10 +9,10 @@ #define _TRACE_NFS4_H #include -#include +#include -#include -#include +#include +#include #define show_nfs_fattr_flags(valid) \ __print_flags((unsigned long)valid, "|", \ diff --git a/fs/nfs/nfstrace.h b/fs/nfs/nfstrace.h index 8c6cc58679ff8..642f6921852fa 100644 --- a/fs/nfs/nfstrace.h +++ b/fs/nfs/nfstrace.h @@ -11,9 +11,9 @@ #include #include -#include -#include -#include +#include +#include +#include #define nfs_show_cache_validity(v) \ __print_flags(v, "|", \ diff --git a/include/trace/events/rpcgss.h b/include/trace/events/rpcgss.h index c9048f3e471bb..3f121eed369e8 100644 --- a/include/trace/events/rpcgss.h +++ b/include/trace/events/rpcgss.h @@ -13,7 +13,7 @@ #include -#include +#include /** ** GSS-API related trace events diff --git a/include/trace/events/rpcrdma.h b/include/trace/events/rpcrdma.h index fcd3b3f1020a6..8f461e04e5f09 100644 --- a/include/trace/events/rpcrdma.h +++ b/include/trace/events/rpcrdma.h @@ -15,8 +15,8 @@ #include #include -#include -#include +#include +#include /** ** Event classes diff --git a/include/trace/events/sunrpc.h b/include/trace/events/sunrpc.h index f48f2ab9d238b..ffe2679a13ced 100644 --- a/include/trace/events/sunrpc.h +++ b/include/trace/events/sunrpc.h @@ -14,7 +14,7 @@ #include #include -#include +#include TRACE_DEFINE_ENUM(SOCK_STREAM); TRACE_DEFINE_ENUM(SOCK_DGRAM); diff --git a/include/trace/events/fs.h b/include/trace/misc/fs.h similarity index 100% rename from include/trace/events/fs.h rename to include/trace/misc/fs.h diff --git a/include/trace/events/nfs.h b/include/trace/misc/nfs.h similarity index 100% rename from include/trace/events/nfs.h rename to include/trace/misc/nfs.h diff --git a/include/trace/events/rdma.h b/include/trace/misc/rdma.h similarity index 100% rename from include/trace/events/rdma.h rename to include/trace/misc/rdma.h diff --git a/include/trace/events/sunrpc_base.h b/include/trace/misc/sunrpc.h similarity index 100% rename from include/trace/events/sunrpc_base.h rename to include/trace/misc/sunrpc.h From a1049eb47f20b9eabf9afb218578fff16b4baca6 Mon Sep 17 00:00:00 2001 From: Dai Ngo Date: Wed, 16 Nov 2022 19:44:45 -0800 Subject: [PATCH 40/49] NFSD: refactoring courtesy_client_reaper to a generic low memory shrinker Refactoring courtesy_client_reaper to generic low memory shrinker so it can be used for other purposes. Signed-off-by: Dai Ngo Signed-off-by: Chuck Lever --- fs/nfsd/nfs4state.c | 25 ++++++++++++++++--------- 1 file changed, 16 insertions(+), 9 deletions(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 97badca3135ee..00b3fa164fe8b 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -4361,7 +4361,7 @@ nfsd4_init_slabs(void) } static unsigned long -nfsd_courtesy_client_count(struct shrinker *shrink, struct shrink_control *sc) +nfsd4_state_shrinker_count(struct shrinker *shrink, struct shrink_control *sc) { int cnt; struct nfsd_net *nn = container_of(shrink, @@ -4374,7 +4374,7 @@ nfsd_courtesy_client_count(struct shrinker *shrink, struct shrink_control *sc) } static unsigned long -nfsd_courtesy_client_scan(struct shrinker *shrink, struct shrink_control *sc) +nfsd4_state_shrinker_scan(struct shrinker *shrink, struct shrink_control *sc) { return SHRINK_STOP; } @@ -4401,8 +4401,8 @@ nfsd4_init_leases_net(struct nfsd_net *nn) nn->nfs4_max_clients = max_t(int, max_clients, NFS4_CLIENTS_PER_GB); atomic_set(&nn->nfsd_courtesy_clients, 0); - nn->nfsd_client_shrinker.scan_objects = nfsd_courtesy_client_scan; - nn->nfsd_client_shrinker.count_objects = nfsd_courtesy_client_count; + nn->nfsd_client_shrinker.scan_objects = nfsd4_state_shrinker_scan; + nn->nfsd_client_shrinker.count_objects = nfsd4_state_shrinker_count; nn->nfsd_client_shrinker.seeks = DEFAULT_SEEKS; return register_shrinker(&nn->nfsd_client_shrinker, "nfsd-client"); } @@ -6151,17 +6151,24 @@ laundromat_main(struct work_struct *laundry) } static void -courtesy_client_reaper(struct work_struct *reaper) +courtesy_client_reaper(struct nfsd_net *nn) { struct list_head reaplist; - struct delayed_work *dwork = to_delayed_work(reaper); - struct nfsd_net *nn = container_of(dwork, struct nfsd_net, - nfsd_shrinker_work); nfs4_get_courtesy_client_reaplist(nn, &reaplist); nfs4_process_client_reaplist(&reaplist); } +static void +nfsd4_state_shrinker_worker(struct work_struct *work) +{ + struct delayed_work *dwork = to_delayed_work(work); + struct nfsd_net *nn = container_of(dwork, struct nfsd_net, + nfsd_shrinker_work); + + courtesy_client_reaper(nn); +} + static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stid *stp) { if (!fh_match(&fhp->fh_handle, &stp->sc_file->fi_fhandle)) @@ -7985,7 +7992,7 @@ static int nfs4_state_create_net(struct net *net) INIT_LIST_HEAD(&nn->blocked_locks_lru); INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); - INIT_DELAYED_WORK(&nn->nfsd_shrinker_work, courtesy_client_reaper); + INIT_DELAYED_WORK(&nn->nfsd_shrinker_work, nfsd4_state_shrinker_worker); get_net(net); return 0; From 3959066b697b5dfbb7141124ae9665337d4bc638 Mon Sep 17 00:00:00 2001 From: Dai Ngo Date: Wed, 16 Nov 2022 19:44:46 -0800 Subject: [PATCH 41/49] NFSD: add support for sending CB_RECALL_ANY Add XDR encode and decode function for CB_RECALL_ANY. Signed-off-by: Dai Ngo Signed-off-by: Chuck Lever --- fs/nfsd/nfs4callback.c | 72 ++++++++++++++++++++++++++++++++++++++++++ fs/nfsd/state.h | 1 + fs/nfsd/xdr4.h | 5 +++ fs/nfsd/xdr4cb.h | 6 ++++ 4 files changed, 84 insertions(+) diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c index f0e69edf5f0f1..1b57f2c2f0bb1 100644 --- a/fs/nfsd/nfs4callback.c +++ b/fs/nfsd/nfs4callback.c @@ -76,6 +76,17 @@ static __be32 *xdr_encode_empty_array(__be32 *p) * 1 Protocol" */ +static void encode_uint32(struct xdr_stream *xdr, u32 n) +{ + WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0); +} + +static void encode_bitmap4(struct xdr_stream *xdr, const __u32 *bitmap, + size_t len) +{ + WARN_ON_ONCE(xdr_stream_encode_uint32_array(xdr, bitmap, len) < 0); +} + /* * nfs_cb_opnum4 * @@ -328,6 +339,24 @@ static void encode_cb_recall4args(struct xdr_stream *xdr, hdr->nops++; } +/* + * CB_RECALLANY4args + * + * struct CB_RECALLANY4args { + * uint32_t craa_objects_to_keep; + * bitmap4 craa_type_mask; + * }; + */ +static void +encode_cb_recallany4args(struct xdr_stream *xdr, + struct nfs4_cb_compound_hdr *hdr, struct nfsd4_cb_recall_any *ra) +{ + encode_nfs_cb_opnum4(xdr, OP_CB_RECALL_ANY); + encode_uint32(xdr, ra->ra_keep); + encode_bitmap4(xdr, ra->ra_bmval, ARRAY_SIZE(ra->ra_bmval)); + hdr->nops++; +} + /* * CB_SEQUENCE4args * @@ -482,6 +511,26 @@ static void nfs4_xdr_enc_cb_recall(struct rpc_rqst *req, struct xdr_stream *xdr, encode_cb_nops(&hdr); } +/* + * 20.6. Operation 8: CB_RECALL_ANY - Keep Any N Recallable Objects + */ +static void +nfs4_xdr_enc_cb_recall_any(struct rpc_rqst *req, + struct xdr_stream *xdr, const void *data) +{ + const struct nfsd4_callback *cb = data; + struct nfsd4_cb_recall_any *ra; + struct nfs4_cb_compound_hdr hdr = { + .ident = cb->cb_clp->cl_cb_ident, + .minorversion = cb->cb_clp->cl_minorversion, + }; + + ra = container_of(cb, struct nfsd4_cb_recall_any, ra_cb); + encode_cb_compound4args(xdr, &hdr); + encode_cb_sequence4args(xdr, cb, &hdr); + encode_cb_recallany4args(xdr, &hdr, ra); + encode_cb_nops(&hdr); +} /* * NFSv4.0 and NFSv4.1 XDR decode functions @@ -520,6 +569,28 @@ static int nfs4_xdr_dec_cb_recall(struct rpc_rqst *rqstp, return decode_cb_op_status(xdr, OP_CB_RECALL, &cb->cb_status); } +/* + * 20.6. Operation 8: CB_RECALL_ANY - Keep Any N Recallable Objects + */ +static int +nfs4_xdr_dec_cb_recall_any(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + void *data) +{ + struct nfsd4_callback *cb = data; + struct nfs4_cb_compound_hdr hdr; + int status; + + status = decode_cb_compound4res(xdr, &hdr); + if (unlikely(status)) + return status; + status = decode_cb_sequence4res(xdr, cb); + if (unlikely(status || cb->cb_seq_status)) + return status; + status = decode_cb_op_status(xdr, OP_CB_RECALL_ANY, &cb->cb_status); + return status; +} + #ifdef CONFIG_NFSD_PNFS /* * CB_LAYOUTRECALL4args @@ -783,6 +854,7 @@ static const struct rpc_procinfo nfs4_cb_procedures[] = { #endif PROC(CB_NOTIFY_LOCK, COMPOUND, cb_notify_lock, cb_notify_lock), PROC(CB_OFFLOAD, COMPOUND, cb_offload, cb_offload), + PROC(CB_RECALL_ANY, COMPOUND, cb_recall_any, cb_recall_any), }; static unsigned int nfs4_cb_counts[ARRAY_SIZE(nfs4_cb_procedures)]; diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h index eadd7f465bf52..e30882f8b8516 100644 --- a/fs/nfsd/state.h +++ b/fs/nfsd/state.h @@ -636,6 +636,7 @@ enum nfsd4_cb_op { NFSPROC4_CLNT_CB_OFFLOAD, NFSPROC4_CLNT_CB_SEQUENCE, NFSPROC4_CLNT_CB_NOTIFY_LOCK, + NFSPROC4_CLNT_CB_RECALL_ANY, }; /* Returns true iff a is later than b: */ diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h index 0eb00105d845b..4fd2cf6d1d2dc 100644 --- a/fs/nfsd/xdr4.h +++ b/fs/nfsd/xdr4.h @@ -896,5 +896,10 @@ struct nfsd4_operation { union nfsd4_op_u *); }; +struct nfsd4_cb_recall_any { + struct nfsd4_callback ra_cb; + u32 ra_keep; + u32 ra_bmval[1]; +}; #endif diff --git a/fs/nfsd/xdr4cb.h b/fs/nfsd/xdr4cb.h index 547cf07cf4e08..0d39af1b00a0f 100644 --- a/fs/nfsd/xdr4cb.h +++ b/fs/nfsd/xdr4cb.h @@ -48,3 +48,9 @@ #define NFS4_dec_cb_offload_sz (cb_compound_dec_hdr_sz + \ cb_sequence_dec_sz + \ op_dec_sz) +#define NFS4_enc_cb_recall_any_sz (cb_compound_enc_hdr_sz + \ + cb_sequence_enc_sz + \ + 1 + 1 + 1) +#define NFS4_dec_cb_recall_any_sz (cb_compound_dec_hdr_sz + \ + cb_sequence_dec_sz + \ + op_dec_sz) From 44df6f439a1790a5f602e3842879efa88f346672 Mon Sep 17 00:00:00 2001 From: Dai Ngo Date: Wed, 16 Nov 2022 19:44:47 -0800 Subject: [PATCH 42/49] NFSD: add delegation reaper to react to low memory condition The delegation reaper is called by nfsd memory shrinker's on the 'count' callback. It scans the client list and sends the courtesy CB_RECALL_ANY to the clients that hold delegations. To avoid flooding the clients with CB_RECALL_ANY requests, the delegation reaper sends only one CB_RECALL_ANY request to each client per 5 seconds. Signed-off-by: Dai Ngo [ cel: moved definition of RCA4_TYPE_MASK_RDATA_DLG ] Signed-off-by: Chuck Lever --- fs/nfsd/nfs4state.c | 88 ++++++++++++++++++++++++++++++++++++++++++-- fs/nfsd/state.h | 5 +++ include/linux/nfs4.h | 13 +++++++ 3 files changed, 102 insertions(+), 4 deletions(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 00b3fa164fe8b..c981704ec6a1f 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -2144,6 +2144,7 @@ static void __free_client(struct kref *k) kfree(clp->cl_nii_domain.data); kfree(clp->cl_nii_name.data); idr_destroy(&clp->cl_stateids); + kfree(clp->cl_ra); kmem_cache_free(client_slab, clp); } @@ -2871,6 +2872,36 @@ static const struct tree_descr client_files[] = { [3] = {""}, }; +static int +nfsd4_cb_recall_any_done(struct nfsd4_callback *cb, + struct rpc_task *task) +{ + switch (task->tk_status) { + case -NFS4ERR_DELAY: + rpc_delay(task, 2 * HZ); + return 0; + default: + return 1; + } +} + +static void +nfsd4_cb_recall_any_release(struct nfsd4_callback *cb) +{ + struct nfs4_client *clp = cb->cb_clp; + struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); + + spin_lock(&nn->client_lock); + clear_bit(NFSD4_CLIENT_CB_RECALL_ANY, &clp->cl_flags); + put_client_renew_locked(clp); + spin_unlock(&nn->client_lock); +} + +static const struct nfsd4_callback_ops nfsd4_cb_recall_any_ops = { + .done = nfsd4_cb_recall_any_done, + .release = nfsd4_cb_recall_any_release, +}; + static struct nfs4_client *create_client(struct xdr_netobj name, struct svc_rqst *rqstp, nfs4_verifier *verf) { @@ -2908,6 +2939,14 @@ static struct nfs4_client *create_client(struct xdr_netobj name, free_client(clp); return NULL; } + clp->cl_ra = kzalloc(sizeof(*clp->cl_ra), GFP_KERNEL); + if (!clp->cl_ra) { + free_client(clp); + return NULL; + } + clp->cl_ra_time = 0; + nfsd4_init_cb(&clp->cl_ra->ra_cb, clp, &nfsd4_cb_recall_any_ops, + NFSPROC4_CLNT_CB_RECALL_ANY); return clp; } @@ -4363,14 +4402,16 @@ nfsd4_init_slabs(void) static unsigned long nfsd4_state_shrinker_count(struct shrinker *shrink, struct shrink_control *sc) { - int cnt; + int count; struct nfsd_net *nn = container_of(shrink, struct nfsd_net, nfsd_client_shrinker); - cnt = atomic_read(&nn->nfsd_courtesy_clients); - if (cnt > 0) + count = atomic_read(&nn->nfsd_courtesy_clients); + if (!count) + count = atomic_long_read(&num_delegations); + if (count) mod_delayed_work(laundry_wq, &nn->nfsd_shrinker_work, 0); - return (unsigned long)cnt; + return (unsigned long)count; } static unsigned long @@ -6159,6 +6200,44 @@ courtesy_client_reaper(struct nfsd_net *nn) nfs4_process_client_reaplist(&reaplist); } +static void +deleg_reaper(struct nfsd_net *nn) +{ + struct list_head *pos, *next; + struct nfs4_client *clp; + struct list_head cblist; + + INIT_LIST_HEAD(&cblist); + spin_lock(&nn->client_lock); + list_for_each_safe(pos, next, &nn->client_lru) { + clp = list_entry(pos, struct nfs4_client, cl_lru); + if (clp->cl_state != NFSD4_ACTIVE || + list_empty(&clp->cl_delegations) || + atomic_read(&clp->cl_delegs_in_recall) || + test_bit(NFSD4_CLIENT_CB_RECALL_ANY, &clp->cl_flags) || + (ktime_get_boottime_seconds() - + clp->cl_ra_time < 5)) { + continue; + } + list_add(&clp->cl_ra_cblist, &cblist); + + /* release in nfsd4_cb_recall_any_release */ + atomic_inc(&clp->cl_rpc_users); + set_bit(NFSD4_CLIENT_CB_RECALL_ANY, &clp->cl_flags); + clp->cl_ra_time = ktime_get_boottime_seconds(); + } + spin_unlock(&nn->client_lock); + + while (!list_empty(&cblist)) { + clp = list_first_entry(&cblist, struct nfs4_client, + cl_ra_cblist); + list_del_init(&clp->cl_ra_cblist); + clp->cl_ra->ra_keep = 0; + clp->cl_ra->ra_bmval[0] = BIT(RCA4_TYPE_MASK_RDATA_DLG); + nfsd4_run_cb(&clp->cl_ra->ra_cb); + } +} + static void nfsd4_state_shrinker_worker(struct work_struct *work) { @@ -6167,6 +6246,7 @@ nfsd4_state_shrinker_worker(struct work_struct *work) nfsd_shrinker_work); courtesy_client_reaper(nn); + deleg_reaper(nn); } static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stid *stp) diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h index e30882f8b8516..e94634d305912 100644 --- a/fs/nfsd/state.h +++ b/fs/nfsd/state.h @@ -368,6 +368,7 @@ struct nfs4_client { #define NFSD4_CLIENT_UPCALL_LOCK (5) /* upcall serialization */ #define NFSD4_CLIENT_CB_FLAG_MASK (1 << NFSD4_CLIENT_CB_UPDATE | \ 1 << NFSD4_CLIENT_CB_KILL) +#define NFSD4_CLIENT_CB_RECALL_ANY (6) unsigned long cl_flags; const struct cred *cl_cb_cred; struct rpc_clnt *cl_cb_client; @@ -411,6 +412,10 @@ struct nfs4_client { unsigned int cl_state; atomic_t cl_delegs_in_recall; + + struct nfsd4_cb_recall_any *cl_ra; + time64_t cl_ra_time; + struct list_head cl_ra_cblist; }; /* struct nfs4_client_reset diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h index 8d04b6a5964c4..730003c4f4af4 100644 --- a/include/linux/nfs4.h +++ b/include/linux/nfs4.h @@ -732,4 +732,17 @@ enum nfs4_setxattr_options { SETXATTR4_CREATE = 1, SETXATTR4_REPLACE = 2, }; + +enum { + RCA4_TYPE_MASK_RDATA_DLG = 0, + RCA4_TYPE_MASK_WDATA_DLG = 1, + RCA4_TYPE_MASK_DIR_DLG = 2, + RCA4_TYPE_MASK_FILE_LAYOUT = 3, + RCA4_TYPE_MASK_BLK_LAYOUT = 4, + RCA4_TYPE_MASK_OBJ_LAYOUT_MIN = 8, + RCA4_TYPE_MASK_OBJ_LAYOUT_MAX = 9, + RCA4_TYPE_MASK_OTHER_LAYOUT_MIN = 12, + RCA4_TYPE_MASK_OTHER_LAYOUT_MAX = 15, +}; + #endif From 638593be55c0b37a1930038460a9918215d5c24b Mon Sep 17 00:00:00 2001 From: Dai Ngo Date: Wed, 16 Nov 2022 19:44:48 -0800 Subject: [PATCH 43/49] NFSD: add CB_RECALL_ANY tracepoints Add tracepoints to trace start and end of CB_RECALL_ANY operation. Signed-off-by: Dai Ngo [ cel: added show_rca_mask() macro ] Signed-off-by: Chuck Lever --- fs/nfsd/nfs4state.c | 2 ++ fs/nfsd/trace.h | 50 ++++++++++++++++++++++++++++++++++++++++ include/trace/misc/nfs.h | 12 ++++++++++ 3 files changed, 64 insertions(+) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index c981704ec6a1f..e1e85c21f12bc 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -2876,6 +2876,7 @@ static int nfsd4_cb_recall_any_done(struct nfsd4_callback *cb, struct rpc_task *task) { + trace_nfsd_cb_recall_any_done(cb, task); switch (task->tk_status) { case -NFS4ERR_DELAY: rpc_delay(task, 2 * HZ); @@ -6234,6 +6235,7 @@ deleg_reaper(struct nfsd_net *nn) list_del_init(&clp->cl_ra_cblist); clp->cl_ra->ra_keep = 0; clp->cl_ra->ra_bmval[0] = BIT(RCA4_TYPE_MASK_RDATA_DLG); + trace_nfsd_cb_recall_any(clp->cl_ra); nfsd4_run_cb(&clp->cl_ra->ra_cb); } } diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h index 33567b87cc6b6..46b8f68a24974 100644 --- a/fs/nfsd/trace.h +++ b/fs/nfsd/trace.h @@ -9,9 +9,12 @@ #define _NFSD_TRACE_H #include +#include +#include #include "export.h" #include "nfsfh.h" +#include "xdr4.h" #define NFSD_TRACE_PROC_RES_FIELDS \ __field(unsigned int, netns_ino) \ @@ -1562,6 +1565,32 @@ TRACE_EVENT(nfsd_cb_offload, __entry->fh_hash, __entry->count, __entry->status) ); +TRACE_EVENT(nfsd_cb_recall_any, + TP_PROTO( + const struct nfsd4_cb_recall_any *ra + ), + TP_ARGS(ra), + TP_STRUCT__entry( + __field(u32, cl_boot) + __field(u32, cl_id) + __field(u32, keep) + __field(unsigned long, bmval0) + __sockaddr(addr, ra->ra_cb.cb_clp->cl_cb_conn.cb_addrlen) + ), + TP_fast_assign( + __entry->cl_boot = ra->ra_cb.cb_clp->cl_clientid.cl_boot; + __entry->cl_id = ra->ra_cb.cb_clp->cl_clientid.cl_id; + __entry->keep = ra->ra_keep; + __entry->bmval0 = ra->ra_bmval[0]; + __assign_sockaddr(addr, &ra->ra_cb.cb_clp->cl_addr, + ra->ra_cb.cb_clp->cl_cb_conn.cb_addrlen); + ), + TP_printk("addr=%pISpc client %08x:%08x keep=%u bmval0=%s", + __get_sockaddr(addr), __entry->cl_boot, __entry->cl_id, + __entry->keep, show_rca_mask(__entry->bmval0) + ) +); + DECLARE_EVENT_CLASS(nfsd_cb_done_class, TP_PROTO( const stateid_t *stp, @@ -1601,6 +1630,27 @@ DEFINE_NFSD_CB_DONE_EVENT(nfsd_cb_notify_lock_done); DEFINE_NFSD_CB_DONE_EVENT(nfsd_cb_layout_done); DEFINE_NFSD_CB_DONE_EVENT(nfsd_cb_offload_done); +TRACE_EVENT(nfsd_cb_recall_any_done, + TP_PROTO( + const struct nfsd4_callback *cb, + const struct rpc_task *task + ), + TP_ARGS(cb, task), + TP_STRUCT__entry( + __field(u32, cl_boot) + __field(u32, cl_id) + __field(int, status) + ), + TP_fast_assign( + __entry->status = task->tk_status; + __entry->cl_boot = cb->cb_clp->cl_clientid.cl_boot; + __entry->cl_id = cb->cb_clp->cl_clientid.cl_id; + ), + TP_printk("client %08x:%08x status=%d", + __entry->cl_boot, __entry->cl_id, __entry->status + ) +); + #endif /* _NFSD_TRACE_H */ #undef TRACE_INCLUDE_PATH diff --git a/include/trace/misc/nfs.h b/include/trace/misc/nfs.h index 09ffdbb04134d..0d9d48dca38a8 100644 --- a/include/trace/misc/nfs.h +++ b/include/trace/misc/nfs.h @@ -360,6 +360,18 @@ TRACE_DEFINE_ENUM(IOMODE_ANY); { IOMODE_RW, "RW" }, \ { IOMODE_ANY, "ANY" }) +#define show_rca_mask(x) \ + __print_flags(x, "|", \ + { BIT(RCA4_TYPE_MASK_RDATA_DLG), "RDATA_DLG" }, \ + { BIT(RCA4_TYPE_MASK_WDATA_DLG), "WDATA_DLG" }, \ + { BIT(RCA4_TYPE_MASK_DIR_DLG), "DIR_DLG" }, \ + { BIT(RCA4_TYPE_MASK_FILE_LAYOUT), "FILE_LAYOUT" }, \ + { BIT(RCA4_TYPE_MASK_BLK_LAYOUT), "BLK_LAYOUT" }, \ + { BIT(RCA4_TYPE_MASK_OBJ_LAYOUT_MIN), "OBJ_LAYOUT_MIN" }, \ + { BIT(RCA4_TYPE_MASK_OBJ_LAYOUT_MAX), "OBJ_LAYOUT_MAX" }, \ + { BIT(RCA4_TYPE_MASK_OTHER_LAYOUT_MIN), "OTHER_LAYOUT_MIN" }, \ + { BIT(RCA4_TYPE_MASK_OTHER_LAYOUT_MAX), "OTHER_LAYOUT_MAX" }) + #define show_nfs4_seq4_status(x) \ __print_flags(x, "|", \ { SEQ4_STATUS_CB_PATH_DOWN, "CB_PATH_DOWN" }, \ From da522b5fe1a5f8b7c20a0023e87b52a150e53bf5 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Sat, 26 Nov 2022 15:55:18 -0500 Subject: [PATCH 44/49] SUNRPC: Don't leak netobj memory when gss_read_proxy_verf() fails Fixes: 030d794bf498 ("SUNRPC: Use gssproxy upcall for server RPCGSS authentication.") Signed-off-by: Chuck Lever Cc: Reviewed-by: Jeff Layton --- net/sunrpc/auth_gss/svcauth_gss.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c index bcd74dddbe2db..9a5db285d4ae5 100644 --- a/net/sunrpc/auth_gss/svcauth_gss.c +++ b/net/sunrpc/auth_gss/svcauth_gss.c @@ -1162,18 +1162,23 @@ static int gss_read_proxy_verf(struct svc_rqst *rqstp, return res; inlen = svc_getnl(argv); - if (inlen > (argv->iov_len + rqstp->rq_arg.page_len)) + if (inlen > (argv->iov_len + rqstp->rq_arg.page_len)) { + kfree(in_handle->data); return SVC_DENIED; + } pages = DIV_ROUND_UP(inlen, PAGE_SIZE); in_token->pages = kcalloc(pages, sizeof(struct page *), GFP_KERNEL); - if (!in_token->pages) + if (!in_token->pages) { + kfree(in_handle->data); return SVC_DENIED; + } in_token->page_base = 0; in_token->page_len = inlen; for (i = 0; i < pages; i++) { in_token->pages[i] = alloc_page(GFP_KERNEL); if (!in_token->pages[i]) { + kfree(in_handle->data); gss_free_in_token_pages(in_token); return SVC_DENIED; } From ad3d24c59d8c3b31b10bb3e4944ae7bef63480d3 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Sat, 26 Nov 2022 15:55:24 -0500 Subject: [PATCH 45/49] SUNRPC: Clean up xdr_write_pages() Make it more evident how xdr_write_pages() updates the tail buffer by using the convention of naming the iov pointer variable "tail". I spent more than a couple of hours chasing through code to understand this, so someone is likely to find this useful later. Signed-off-by: Chuck Lever Reviewed-by: Jeff Layton --- net/sunrpc/xdr.c | 22 +++++++++++++--------- 1 file changed, 13 insertions(+), 9 deletions(-) diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c index 336a7c7833e49..f7767bf224069 100644 --- a/net/sunrpc/xdr.c +++ b/net/sunrpc/xdr.c @@ -1224,30 +1224,34 @@ EXPORT_SYMBOL(xdr_restrict_buflen); /** * xdr_write_pages - Insert a list of pages into an XDR buffer for sending * @xdr: pointer to xdr_stream - * @pages: list of pages - * @base: offset of first byte - * @len: length of data in bytes + * @pages: array of pages to insert + * @base: starting offset of first data byte in @pages + * @len: number of data bytes in @pages to insert * + * After the @pages are added, the tail iovec is instantiated pointing to + * end of the head buffer, and the stream is set up to encode subsequent + * items into the tail. */ void xdr_write_pages(struct xdr_stream *xdr, struct page **pages, unsigned int base, unsigned int len) { struct xdr_buf *buf = xdr->buf; - struct kvec *iov = buf->tail; + struct kvec *tail = buf->tail; + buf->pages = pages; buf->page_base = base; buf->page_len = len; - iov->iov_base = (char *)xdr->p; - iov->iov_len = 0; - xdr->iov = iov; + tail->iov_base = xdr->p; + tail->iov_len = 0; + xdr->iov = tail; if (len & 3) { unsigned int pad = 4 - (len & 3); BUG_ON(xdr->p >= xdr->end); - iov->iov_base = (char *)xdr->p + (len & 3); - iov->iov_len += pad; + tail->iov_base = (char *)xdr->p + (len & 3); + tail->iov_len += pad; len += pad; *xdr->p++ = 0; } From 9315564747cb6a570e99196b3a4880fb817635fd Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Sat, 26 Nov 2022 15:55:30 -0500 Subject: [PATCH 46/49] NFSD: Use only RQ_DROPME to signal the need to drop a reply Clean up: NFSv2 has the only two usages of rpc_drop_reply in the NFSD code base. Since NFSv2 is going away at some point, replace these in order to simplify the "drop this reply?" check in nfsd_dispatch(). Signed-off-by: Chuck Lever Reviewed-by: Jeff Layton --- fs/nfsd/nfsproc.c | 4 ++-- fs/nfsd/nfssvc.c | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/fs/nfsd/nfsproc.c b/fs/nfsd/nfsproc.c index 52fc222c34f26..a5570cf75f3fd 100644 --- a/fs/nfsd/nfsproc.c +++ b/fs/nfsd/nfsproc.c @@ -211,7 +211,7 @@ nfsd_proc_read(struct svc_rqst *rqstp) if (resp->status == nfs_ok) resp->status = fh_getattr(&resp->fh, &resp->stat); else if (resp->status == nfserr_jukebox) - return rpc_drop_reply; + __set_bit(RQ_DROPME, &rqstp->rq_flags); return rpc_success; } @@ -246,7 +246,7 @@ nfsd_proc_write(struct svc_rqst *rqstp) if (resp->status == nfs_ok) resp->status = fh_getattr(&resp->fh, &resp->stat); else if (resp->status == nfserr_jukebox) - return rpc_drop_reply; + __set_bit(RQ_DROPME, &rqstp->rq_flags); return rpc_success; } diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c index 62e473b0ca52a..56fba1cba3af7 100644 --- a/fs/nfsd/nfssvc.c +++ b/fs/nfsd/nfssvc.c @@ -1060,7 +1060,7 @@ int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp) svcxdr_init_encode(rqstp); *statp = proc->pc_func(rqstp); - if (*statp == rpc_drop_reply || test_bit(RQ_DROPME, &rqstp->rq_flags)) + if (test_bit(RQ_DROPME, &rqstp->rq_flags)) goto out_update_drop; if (!proc->pc_encode(rqstp, &rqstp->rq_res_stream)) From c65d9df0c4a0e150d97aff363cbd0363f21f9466 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Sat, 26 Nov 2022 15:55:36 -0500 Subject: [PATCH 47/49] SUNRPC: Make the svc_authenticate tracepoint conditional Clean up: Simplify the tracepoint's only call site. Also, I noticed that when svc_authenticate() returns SVC_COMPLETE, it leaves rq_auth_stat set to an error value. That doesn't need to be recorded in the trace log. Signed-off-by: Chuck Lever Reviewed-by: Jeff Layton --- include/trace/events/sunrpc.h | 4 +++- net/sunrpc/svc.c | 3 +-- 2 files changed, 4 insertions(+), 3 deletions(-) diff --git a/include/trace/events/sunrpc.h b/include/trace/events/sunrpc.h index ffe2679a13ced..37604e0e59633 100644 --- a/include/trace/events/sunrpc.h +++ b/include/trace/events/sunrpc.h @@ -1666,11 +1666,13 @@ TRACE_DEFINE_ENUM(SVC_COMPLETE); #define SVC_RQST_ENDPOINT_VARARGS \ __entry->xid, __get_sockaddr(server), __get_sockaddr(client) -TRACE_EVENT(svc_authenticate, +TRACE_EVENT_CONDITION(svc_authenticate, TP_PROTO(const struct svc_rqst *rqst, int auth_res), TP_ARGS(rqst, auth_res), + TP_CONDITION(auth_res != SVC_OK && auth_res != SVC_COMPLETE), + TP_STRUCT__entry( SVC_RQST_ENDPOINT_FIELDS(rqst) diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c index 34383c352bc38..8f1b596db33fc 100644 --- a/net/sunrpc/svc.c +++ b/net/sunrpc/svc.c @@ -1280,8 +1280,7 @@ svc_process_common(struct svc_rqst *rqstp, struct kvec *argv, struct kvec *resv) /* Also give the program a chance to reject this call: */ if (auth_res == SVC_OK && progp) auth_res = progp->pg_authenticate(rqstp); - if (auth_res != SVC_OK) - trace_svc_authenticate(rqstp, auth_res); + trace_svc_authenticate(rqstp, auth_res); switch (auth_res) { case SVC_OK: break; From 4dd9daa9124aad3c3d4ceca4f1d417cc62d59156 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Sun, 27 Nov 2022 12:17:27 -0500 Subject: [PATCH 48/49] SUNRPC: Fix crasher in unwrap_integ_data() If a zero length is passed to kmalloc() it returns 0x10, which is not a valid address. gss_verify_mic() subsequently crashes when it attempts to dereference that pointer. Instead of allocating this memory on every call based on an untrusted size value, use a piece of dynamically-allocated scratch memory that is always available. Signed-off-by: Chuck Lever Reviewed-by: Jeff Layton --- net/sunrpc/auth_gss/svcauth_gss.c | 55 ++++++++++++++++++------------- 1 file changed, 32 insertions(+), 23 deletions(-) diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c index 9a5db285d4ae5..148bb0a7fa5b4 100644 --- a/net/sunrpc/auth_gss/svcauth_gss.c +++ b/net/sunrpc/auth_gss/svcauth_gss.c @@ -49,11 +49,36 @@ #include #include #include +#include #include #include "gss_rpc_upcall.h" +/* + * Unfortunately there isn't a maximum checksum size exported via the + * GSS API. Manufacture one based on GSS mechanisms supported by this + * implementation. + */ +#define GSS_MAX_CKSUMSIZE (GSS_KRB5_TOK_HDR_LEN + GSS_KRB5_MAX_CKSUM_LEN) + +/* + * This value may be increased in the future to accommodate other + * usage of the scratch buffer. + */ +#define GSS_SCRATCH_SIZE GSS_MAX_CKSUMSIZE + +struct gss_svc_data { + /* decoded gss client cred: */ + struct rpc_gss_wire_cred clcred; + /* save a pointer to the beginning of the encoded verifier, + * for use in encryption/checksumming in svcauth_gss_release: */ + __be32 *verf_start; + struct rsc *rsci; + + /* for temporary results */ + u8 gsd_scratch[GSS_SCRATCH_SIZE]; +}; /* The rpcsec_init cache is used for mapping RPCSEC_GSS_{,CONT_}INIT requests * into replies. @@ -887,13 +912,11 @@ read_u32_from_xdr_buf(struct xdr_buf *buf, int base, u32 *obj) static int unwrap_integ_data(struct svc_rqst *rqstp, struct xdr_buf *buf, u32 seq, struct gss_ctx *ctx) { + struct gss_svc_data *gsd = rqstp->rq_auth_data; u32 integ_len, rseqno, maj_stat; - int stat = -EINVAL; struct xdr_netobj mic; struct xdr_buf integ_buf; - mic.data = NULL; - /* NFS READ normally uses splice to send data in-place. However * the data in cache can change after the reply's MIC is computed * but before the RPC reply is sent. To prevent the client from @@ -917,11 +940,9 @@ unwrap_integ_data(struct svc_rqst *rqstp, struct xdr_buf *buf, u32 seq, struct g /* copy out mic... */ if (read_u32_from_xdr_buf(buf, integ_len, &mic.len)) goto unwrap_failed; - if (mic.len > RPC_MAX_AUTH_SIZE) - goto unwrap_failed; - mic.data = kmalloc(mic.len, GFP_KERNEL); - if (!mic.data) + if (mic.len > sizeof(gsd->gsd_scratch)) goto unwrap_failed; + mic.data = gsd->gsd_scratch; if (read_bytes_from_xdr_buf(buf, integ_len + 4, mic.data, mic.len)) goto unwrap_failed; maj_stat = gss_verify_mic(ctx, &integ_buf, &mic); @@ -932,20 +953,17 @@ unwrap_integ_data(struct svc_rqst *rqstp, struct xdr_buf *buf, u32 seq, struct g goto bad_seqno; /* trim off the mic and padding at the end before returning */ xdr_buf_trim(buf, round_up_to_quad(mic.len) + 4); - stat = 0; -out: - kfree(mic.data); - return stat; + return 0; unwrap_failed: trace_rpcgss_svc_unwrap_failed(rqstp); - goto out; + return -EINVAL; bad_seqno: trace_rpcgss_svc_seqno_bad(rqstp, seq, rseqno); - goto out; + return -EINVAL; bad_mic: trace_rpcgss_svc_mic(rqstp, maj_stat); - goto out; + return -EINVAL; } static inline int @@ -1023,15 +1041,6 @@ unwrap_priv_data(struct svc_rqst *rqstp, struct xdr_buf *buf, u32 seq, struct gs return -EINVAL; } -struct gss_svc_data { - /* decoded gss client cred: */ - struct rpc_gss_wire_cred clcred; - /* save a pointer to the beginning of the encoded verifier, - * for use in encryption/checksumming in svcauth_gss_release: */ - __be32 *verf_start; - struct rsc *rsci; -}; - static int svcauth_gss_set_client(struct svc_rqst *rqstp) { From e78e274eb22d966258a3845acc71d3c5b8ee2ea8 Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Fri, 2 Dec 2022 12:48:59 -0800 Subject: [PATCH 49/49] NFSD: Avoid clashing function prototypes When built with Control Flow Integrity, function prototypes between caller and function declaration must match. These mismatches are visible at compile time with the new -Wcast-function-type-strict in Clang[1]. There were 97 warnings produced by NFS. For example: fs/nfsd/nfs4xdr.c:2228:17: warning: cast from '__be32 (*)(struct nfsd4_compoundargs *, struct nfsd4_access *)' (aka 'unsigned int (*)(struct nfsd4_compoundargs *, struct nfsd4_access *)') to 'nfsd4_dec' (aka 'unsigned int (*)(struct nfsd4_compoundargs *, void *)') converts to incompatible function type [-Wcast-function-type-strict] [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The enc/dec callbacks were defined as passing "void *" as the second argument, but were being implicitly cast to a new type. Replace the argument with union nfsd4_op_u, and perform explicit member selection in the function body. There are no resulting binary differences. Changes were made mechanically using the following Coccinelle script, with minor by-hand fixes for members that didn't already match their existing argument name: @find@ identifier func; type T, opsT; identifier ops, N; @@ opsT ops[] = { [N] = (T) func, }; @already_void@ identifier find.func; identifier name; @@ func(..., -void +union nfsd4_op_u *name) { ... } @proto depends on !already_void@ identifier find.func; type T; identifier name; position p; @@ func@p(..., T name ) { ... } @script:python get_member@ type_name << proto.T; member; @@ coccinelle.member = cocci.make_ident(type_name.split("_", 1)[1].split(' ',1)[0]) @convert@ identifier find.func; type proto.T; identifier proto.name; position proto.p; identifier get_member.member; @@ func@p(..., - T name + union nfsd4_op_u *u ) { + T name = &u->member; ... } @cast@ identifier find.func; type T, opsT; identifier ops, N; @@ opsT ops[] = { [N] = - (T) func, }; Cc: Chuck Lever Cc: Jeff Layton Cc: Gustavo A. R. Silva Cc: linux-nfs@vger.kernel.org Signed-off-by: Kees Cook Signed-off-by: Chuck Lever --- fs/nfsd/nfs4xdr.c | 632 +++++++++++++++++++++++++++------------------- 1 file changed, 377 insertions(+), 255 deletions(-) diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index 1e4990fb16922..2b4ae858c89be 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -770,16 +770,18 @@ nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs) static __be32 nfsd4_decode_access(struct nfsd4_compoundargs *argp, - struct nfsd4_access *access) + union nfsd4_op_u *u) { + struct nfsd4_access *access = &u->access; if (xdr_stream_decode_u32(argp->xdr, &access->ac_req_access) < 0) return nfserr_bad_xdr; return nfs_ok; } static __be32 -nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) +nfsd4_decode_close(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { + struct nfsd4_close *close = &u->close; if (xdr_stream_decode_u32(argp->xdr, &close->cl_seqid) < 0) return nfserr_bad_xdr; return nfsd4_decode_stateid4(argp, &close->cl_stateid); @@ -787,8 +789,9 @@ nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) static __be32 -nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) +nfsd4_decode_commit(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { + struct nfsd4_commit *commit = &u->commit; if (xdr_stream_decode_u64(argp->xdr, &commit->co_offset) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u32(argp->xdr, &commit->co_count) < 0) @@ -798,8 +801,9 @@ nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit } static __be32 -nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) +nfsd4_decode_create(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { + struct nfsd4_create *create = &u->create; __be32 *p, status; memset(create, 0, sizeof(*create)); @@ -844,22 +848,25 @@ nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create } static inline __be32 -nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) +nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { + struct nfsd4_delegreturn *dr = &u->delegreturn; return nfsd4_decode_stateid4(argp, &dr->dr_stateid); } static inline __be32 -nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr) +nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { + struct nfsd4_getattr *getattr = &u->getattr; memset(getattr, 0, sizeof(*getattr)); return nfsd4_decode_bitmap4(argp, getattr->ga_bmval, ARRAY_SIZE(getattr->ga_bmval)); } static __be32 -nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) +nfsd4_decode_link(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { + struct nfsd4_link *link = &u->link; memset(link, 0, sizeof(*link)); return nfsd4_decode_component4(argp, &link->li_name, &link->li_namelen); } @@ -907,8 +914,9 @@ nfsd4_decode_locker4(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) } static __be32 -nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) +nfsd4_decode_lock(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { + struct nfsd4_lock *lock = &u->lock; memset(lock, 0, sizeof(*lock)); if (xdr_stream_decode_u32(argp->xdr, &lock->lk_type) < 0) return nfserr_bad_xdr; @@ -924,8 +932,9 @@ nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) } static __be32 -nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) +nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { + struct nfsd4_lockt *lockt = &u->lockt; memset(lockt, 0, sizeof(*lockt)); if (xdr_stream_decode_u32(argp->xdr, &lockt->lt_type) < 0) return nfserr_bad_xdr; @@ -940,8 +949,9 @@ nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) } static __be32 -nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) +nfsd4_decode_locku(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { + struct nfsd4_locku *locku = &u->locku; __be32 status; if (xdr_stream_decode_u32(argp->xdr, &locku->lu_type) < 0) @@ -962,8 +972,9 @@ nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) } static __be32 -nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) +nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { + struct nfsd4_lookup *lookup = &u->lookup; return nfsd4_decode_component4(argp, &lookup->lo_name, &lookup->lo_len); } @@ -1143,8 +1154,9 @@ nfsd4_decode_open_claim4(struct nfsd4_compoundargs *argp, } static __be32 -nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) +nfsd4_decode_open(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { + struct nfsd4_open *open = &u->open; __be32 status; u32 dummy; @@ -1171,8 +1183,10 @@ nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) } static __be32 -nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) +nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, + union nfsd4_op_u *u) { + struct nfsd4_open_confirm *open_conf = &u->open_confirm; __be32 status; if (argp->minorversion >= 1) @@ -1190,8 +1204,10 @@ nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_con } static __be32 -nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) +nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, + union nfsd4_op_u *u) { + struct nfsd4_open_downgrade *open_down = &u->open_downgrade; __be32 status; memset(open_down, 0, sizeof(*open_down)); @@ -1209,8 +1225,9 @@ nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_d } static __be32 -nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) +nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { + struct nfsd4_putfh *putfh = &u->putfh; __be32 *p; if (xdr_stream_decode_u32(argp->xdr, &putfh->pf_fhlen) < 0) @@ -1229,7 +1246,7 @@ nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) } static __be32 -nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p) +nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, union nfsd4_op_u *p) { if (argp->minorversion == 0) return nfs_ok; @@ -1237,8 +1254,9 @@ nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p) } static __be32 -nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) +nfsd4_decode_read(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { + struct nfsd4_read *read = &u->read; __be32 status; memset(read, 0, sizeof(*read)); @@ -1254,8 +1272,9 @@ nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) } static __be32 -nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) +nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { + struct nfsd4_readdir *readdir = &u->readdir; __be32 status; memset(readdir, 0, sizeof(*readdir)); @@ -1276,15 +1295,17 @@ nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *read } static __be32 -nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) +nfsd4_decode_remove(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { + struct nfsd4_remove *remove = &u->remove; memset(&remove->rm_cinfo, 0, sizeof(remove->rm_cinfo)); return nfsd4_decode_component4(argp, &remove->rm_name, &remove->rm_namelen); } static __be32 -nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) +nfsd4_decode_rename(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { + struct nfsd4_rename *rename = &u->rename; __be32 status; memset(rename, 0, sizeof(*rename)); @@ -1295,22 +1316,25 @@ nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename } static __be32 -nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) +nfsd4_decode_renew(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { + clientid_t *clientid = &u->renew; return nfsd4_decode_clientid4(argp, clientid); } static __be32 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, - struct nfsd4_secinfo *secinfo) + union nfsd4_op_u *u) { + struct nfsd4_secinfo *secinfo = &u->secinfo; secinfo->si_exp = NULL; return nfsd4_decode_component4(argp, &secinfo->si_name, &secinfo->si_namelen); } static __be32 -nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) +nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { + struct nfsd4_setattr *setattr = &u->setattr; __be32 status; memset(setattr, 0, sizeof(*setattr)); @@ -1324,8 +1348,9 @@ nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *seta } static __be32 -nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) +nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { + struct nfsd4_setclientid *setclientid = &u->setclientid; __be32 *p, status; memset(setclientid, 0, sizeof(*setclientid)); @@ -1367,8 +1392,10 @@ nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclient } static __be32 -nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) +nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, + union nfsd4_op_u *u) { + struct nfsd4_setclientid_confirm *scd_c = &u->setclientid_confirm; __be32 status; if (argp->minorversion >= 1) @@ -1382,8 +1409,9 @@ nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_s /* Also used for NVERIFY */ static __be32 -nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) +nfsd4_decode_verify(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { + struct nfsd4_verify *verify = &u->verify; __be32 *p, status; memset(verify, 0, sizeof(*verify)); @@ -1409,8 +1437,9 @@ nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify } static __be32 -nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) +nfsd4_decode_write(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { + struct nfsd4_write *write = &u->write; __be32 status; status = nfsd4_decode_stateid4(argp, &write->wr_stateid); @@ -1434,8 +1463,10 @@ nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) } static __be32 -nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) +nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, + union nfsd4_op_u *u) { + struct nfsd4_release_lockowner *rlockowner = &u->release_lockowner; __be32 status; if (argp->minorversion >= 1) @@ -1452,16 +1483,20 @@ nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_rel return nfs_ok; } -static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc) +static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, + union nfsd4_op_u *u) { + struct nfsd4_backchannel_ctl *bc = &u->backchannel_ctl; memset(bc, 0, sizeof(*bc)); if (xdr_stream_decode_u32(argp->xdr, &bc->bc_cb_program) < 0) return nfserr_bad_xdr; return nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec); } -static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts) +static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, + union nfsd4_op_u *u) { + struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session; u32 use_conn_in_rdma_mode; __be32 status; @@ -1603,8 +1638,9 @@ nfsd4_decode_nfs_impl_id4(struct nfsd4_compoundargs *argp, static __be32 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp, - struct nfsd4_exchange_id *exid) + union nfsd4_op_u *u) { + struct nfsd4_exchange_id *exid = &u->exchange_id; __be32 status; memset(exid, 0, sizeof(*exid)); @@ -1656,8 +1692,9 @@ nfsd4_decode_channel_attrs4(struct nfsd4_compoundargs *argp, static __be32 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, - struct nfsd4_create_session *sess) + union nfsd4_op_u *u) { + struct nfsd4_create_session *sess = &u->create_session; __be32 status; memset(sess, 0, sizeof(*sess)); @@ -1681,23 +1718,26 @@ nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, static __be32 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp, - struct nfsd4_destroy_session *destroy_session) + union nfsd4_op_u *u) { + struct nfsd4_destroy_session *destroy_session = &u->destroy_session; return nfsd4_decode_sessionid4(argp, &destroy_session->sessionid); } static __be32 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp, - struct nfsd4_free_stateid *free_stateid) + union nfsd4_op_u *u) { + struct nfsd4_free_stateid *free_stateid = &u->free_stateid; return nfsd4_decode_stateid4(argp, &free_stateid->fr_stateid); } #ifdef CONFIG_NFSD_PNFS static __be32 nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp, - struct nfsd4_getdeviceinfo *gdev) + union nfsd4_op_u *u) { + struct nfsd4_getdeviceinfo *gdev = &u->getdeviceinfo; __be32 status; memset(gdev, 0, sizeof(*gdev)); @@ -1717,8 +1757,9 @@ nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp, static __be32 nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp, - struct nfsd4_layoutcommit *lcp) + union nfsd4_op_u *u) { + struct nfsd4_layoutcommit *lcp = &u->layoutcommit; __be32 *p, status; memset(lcp, 0, sizeof(*lcp)); @@ -1753,8 +1794,9 @@ nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp, static __be32 nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp, - struct nfsd4_layoutget *lgp) + union nfsd4_op_u *u) { + struct nfsd4_layoutget *lgp = &u->layoutget; __be32 status; memset(lgp, 0, sizeof(*lgp)); @@ -1781,8 +1823,9 @@ nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp, static __be32 nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp, - struct nfsd4_layoutreturn *lrp) + union nfsd4_op_u *u) { + struct nfsd4_layoutreturn *lrp = &u->layoutreturn; memset(lrp, 0, sizeof(*lrp)); if (xdr_stream_decode_bool(argp->xdr, &lrp->lr_reclaim) < 0) return nfserr_bad_xdr; @@ -1795,8 +1838,9 @@ nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp, #endif /* CONFIG_NFSD_PNFS */ static __be32 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp, - struct nfsd4_secinfo_no_name *sin) + union nfsd4_op_u *u) { + struct nfsd4_secinfo_no_name *sin = &u->secinfo_no_name; if (xdr_stream_decode_u32(argp->xdr, &sin->sin_style) < 0) return nfserr_bad_xdr; @@ -1806,8 +1850,9 @@ static __be32 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp, static __be32 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp, - struct nfsd4_sequence *seq) + union nfsd4_op_u *u) { + struct nfsd4_sequence *seq = &u->sequence; __be32 *p, status; status = nfsd4_decode_sessionid4(argp, &seq->sessionid); @@ -1826,8 +1871,10 @@ nfsd4_decode_sequence(struct nfsd4_compoundargs *argp, } static __be32 -nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid) +nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, + union nfsd4_op_u *u) { + struct nfsd4_test_stateid *test_stateid = &u->test_stateid; struct nfsd4_test_stateid_id *stateid; __be32 status; u32 i; @@ -1852,14 +1899,16 @@ nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_sta } static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, - struct nfsd4_destroy_clientid *dc) + union nfsd4_op_u *u) { + struct nfsd4_destroy_clientid *dc = &u->destroy_clientid; return nfsd4_decode_clientid4(argp, &dc->clientid); } static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, - struct nfsd4_reclaim_complete *rc) + union nfsd4_op_u *u) { + struct nfsd4_reclaim_complete *rc = &u->reclaim_complete; if (xdr_stream_decode_bool(argp->xdr, &rc->rca_one_fs) < 0) return nfserr_bad_xdr; return nfs_ok; @@ -1867,8 +1916,9 @@ static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, static __be32 nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp, - struct nfsd4_fallocate *fallocate) + union nfsd4_op_u *u) { + struct nfsd4_fallocate *fallocate = &u->allocate; __be32 status; status = nfsd4_decode_stateid4(argp, &fallocate->falloc_stateid); @@ -1924,8 +1974,9 @@ static __be32 nfsd4_decode_nl4_server(struct nfsd4_compoundargs *argp, } static __be32 -nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy) +nfsd4_decode_copy(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { + struct nfsd4_copy *copy = &u->copy; u32 consecutive, i, count, sync; struct nl4_server *ns_dummy; __be32 status; @@ -1982,8 +2033,9 @@ nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy) static __be32 nfsd4_decode_copy_notify(struct nfsd4_compoundargs *argp, - struct nfsd4_copy_notify *cn) + union nfsd4_op_u *u) { + struct nfsd4_copy_notify *cn = &u->copy_notify; __be32 status; memset(cn, 0, sizeof(*cn)); @@ -2002,16 +2054,18 @@ nfsd4_decode_copy_notify(struct nfsd4_compoundargs *argp, static __be32 nfsd4_decode_offload_status(struct nfsd4_compoundargs *argp, - struct nfsd4_offload_status *os) + union nfsd4_op_u *u) { + struct nfsd4_offload_status *os = &u->offload_status; os->count = 0; os->status = 0; return nfsd4_decode_stateid4(argp, &os->stateid); } static __be32 -nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek) +nfsd4_decode_seek(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { + struct nfsd4_seek *seek = &u->seek; __be32 status; status = nfsd4_decode_stateid4(argp, &seek->seek_stateid); @@ -2028,8 +2082,9 @@ nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek) } static __be32 -nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone) +nfsd4_decode_clone(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { + struct nfsd4_clone *clone = &u->clone; __be32 status; status = nfsd4_decode_stateid4(argp, &clone->cl_src_stateid); @@ -2154,8 +2209,9 @@ nfsd4_decode_xattr_name(struct nfsd4_compoundargs *argp, char **namep) */ static __be32 nfsd4_decode_getxattr(struct nfsd4_compoundargs *argp, - struct nfsd4_getxattr *getxattr) + union nfsd4_op_u *u) { + struct nfsd4_getxattr *getxattr = &u->getxattr; __be32 status; u32 maxcount; @@ -2173,8 +2229,9 @@ nfsd4_decode_getxattr(struct nfsd4_compoundargs *argp, static __be32 nfsd4_decode_setxattr(struct nfsd4_compoundargs *argp, - struct nfsd4_setxattr *setxattr) + union nfsd4_op_u *u) { + struct nfsd4_setxattr *setxattr = &u->setxattr; u32 flags, maxcount, size; __be32 status; @@ -2214,8 +2271,9 @@ nfsd4_decode_setxattr(struct nfsd4_compoundargs *argp, static __be32 nfsd4_decode_listxattrs(struct nfsd4_compoundargs *argp, - struct nfsd4_listxattrs *listxattrs) + union nfsd4_op_u *u) { + struct nfsd4_listxattrs *listxattrs = &u->listxattrs; u32 maxcount; memset(listxattrs, 0, sizeof(*listxattrs)); @@ -2245,113 +2303,114 @@ nfsd4_decode_listxattrs(struct nfsd4_compoundargs *argp, static __be32 nfsd4_decode_removexattr(struct nfsd4_compoundargs *argp, - struct nfsd4_removexattr *removexattr) + union nfsd4_op_u *u) { + struct nfsd4_removexattr *removexattr = &u->removexattr; memset(removexattr, 0, sizeof(*removexattr)); return nfsd4_decode_xattr_name(argp, &removexattr->rmxa_name); } static __be32 -nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p) +nfsd4_decode_noop(struct nfsd4_compoundargs *argp, union nfsd4_op_u *p) { return nfs_ok; } static __be32 -nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p) +nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, union nfsd4_op_u *p) { return nfserr_notsupp; } -typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *); +typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u); static const nfsd4_dec nfsd4_dec_ops[] = { - [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, - [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, - [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, - [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, - [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, - [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, - [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, - [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, - [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, - [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, - [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, - [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, - [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, - [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, - [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, - [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm, - [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, - [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, - [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh, - [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, - [OP_READ] = (nfsd4_dec)nfsd4_decode_read, - [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, - [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, - [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, - [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, - [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew, - [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, - [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, - [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, - [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, - [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid, - [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm, - [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, - [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, - [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner, + [OP_ACCESS] = nfsd4_decode_access, + [OP_CLOSE] = nfsd4_decode_close, + [OP_COMMIT] = nfsd4_decode_commit, + [OP_CREATE] = nfsd4_decode_create, + [OP_DELEGPURGE] = nfsd4_decode_notsupp, + [OP_DELEGRETURN] = nfsd4_decode_delegreturn, + [OP_GETATTR] = nfsd4_decode_getattr, + [OP_GETFH] = nfsd4_decode_noop, + [OP_LINK] = nfsd4_decode_link, + [OP_LOCK] = nfsd4_decode_lock, + [OP_LOCKT] = nfsd4_decode_lockt, + [OP_LOCKU] = nfsd4_decode_locku, + [OP_LOOKUP] = nfsd4_decode_lookup, + [OP_LOOKUPP] = nfsd4_decode_noop, + [OP_NVERIFY] = nfsd4_decode_verify, + [OP_OPEN] = nfsd4_decode_open, + [OP_OPENATTR] = nfsd4_decode_notsupp, + [OP_OPEN_CONFIRM] = nfsd4_decode_open_confirm, + [OP_OPEN_DOWNGRADE] = nfsd4_decode_open_downgrade, + [OP_PUTFH] = nfsd4_decode_putfh, + [OP_PUTPUBFH] = nfsd4_decode_putpubfh, + [OP_PUTROOTFH] = nfsd4_decode_noop, + [OP_READ] = nfsd4_decode_read, + [OP_READDIR] = nfsd4_decode_readdir, + [OP_READLINK] = nfsd4_decode_noop, + [OP_REMOVE] = nfsd4_decode_remove, + [OP_RENAME] = nfsd4_decode_rename, + [OP_RENEW] = nfsd4_decode_renew, + [OP_RESTOREFH] = nfsd4_decode_noop, + [OP_SAVEFH] = nfsd4_decode_noop, + [OP_SECINFO] = nfsd4_decode_secinfo, + [OP_SETATTR] = nfsd4_decode_setattr, + [OP_SETCLIENTID] = nfsd4_decode_setclientid, + [OP_SETCLIENTID_CONFIRM] = nfsd4_decode_setclientid_confirm, + [OP_VERIFY] = nfsd4_decode_verify, + [OP_WRITE] = nfsd4_decode_write, + [OP_RELEASE_LOCKOWNER] = nfsd4_decode_release_lockowner, /* new operations for NFSv4.1 */ - [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl, - [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session, - [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id, - [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session, - [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session, - [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid, - [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, + [OP_BACKCHANNEL_CTL] = nfsd4_decode_backchannel_ctl, + [OP_BIND_CONN_TO_SESSION] = nfsd4_decode_bind_conn_to_session, + [OP_EXCHANGE_ID] = nfsd4_decode_exchange_id, + [OP_CREATE_SESSION] = nfsd4_decode_create_session, + [OP_DESTROY_SESSION] = nfsd4_decode_destroy_session, + [OP_FREE_STATEID] = nfsd4_decode_free_stateid, + [OP_GET_DIR_DELEGATION] = nfsd4_decode_notsupp, #ifdef CONFIG_NFSD_PNFS - [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo, - [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit, - [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget, - [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn, + [OP_GETDEVICEINFO] = nfsd4_decode_getdeviceinfo, + [OP_GETDEVICELIST] = nfsd4_decode_notsupp, + [OP_LAYOUTCOMMIT] = nfsd4_decode_layoutcommit, + [OP_LAYOUTGET] = nfsd4_decode_layoutget, + [OP_LAYOUTRETURN] = nfsd4_decode_layoutreturn, #else - [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp, + [OP_GETDEVICEINFO] = nfsd4_decode_notsupp, + [OP_GETDEVICELIST] = nfsd4_decode_notsupp, + [OP_LAYOUTCOMMIT] = nfsd4_decode_notsupp, + [OP_LAYOUTGET] = nfsd4_decode_notsupp, + [OP_LAYOUTRETURN] = nfsd4_decode_notsupp, #endif - [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name, - [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence, - [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid, - [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid, - [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete, + [OP_SECINFO_NO_NAME] = nfsd4_decode_secinfo_no_name, + [OP_SEQUENCE] = nfsd4_decode_sequence, + [OP_SET_SSV] = nfsd4_decode_notsupp, + [OP_TEST_STATEID] = nfsd4_decode_test_stateid, + [OP_WANT_DELEGATION] = nfsd4_decode_notsupp, + [OP_DESTROY_CLIENTID] = nfsd4_decode_destroy_clientid, + [OP_RECLAIM_COMPLETE] = nfsd4_decode_reclaim_complete, /* new operations for NFSv4.2 */ - [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate, - [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy, - [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_copy_notify, - [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate, - [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_offload_status, - [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_offload_status, - [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_read, - [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek, - [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone, + [OP_ALLOCATE] = nfsd4_decode_fallocate, + [OP_COPY] = nfsd4_decode_copy, + [OP_COPY_NOTIFY] = nfsd4_decode_copy_notify, + [OP_DEALLOCATE] = nfsd4_decode_fallocate, + [OP_IO_ADVISE] = nfsd4_decode_notsupp, + [OP_LAYOUTERROR] = nfsd4_decode_notsupp, + [OP_LAYOUTSTATS] = nfsd4_decode_notsupp, + [OP_OFFLOAD_CANCEL] = nfsd4_decode_offload_status, + [OP_OFFLOAD_STATUS] = nfsd4_decode_offload_status, + [OP_READ_PLUS] = nfsd4_decode_read, + [OP_SEEK] = nfsd4_decode_seek, + [OP_WRITE_SAME] = nfsd4_decode_notsupp, + [OP_CLONE] = nfsd4_decode_clone, /* RFC 8276 extended atributes operations */ - [OP_GETXATTR] = (nfsd4_dec)nfsd4_decode_getxattr, - [OP_SETXATTR] = (nfsd4_dec)nfsd4_decode_setxattr, - [OP_LISTXATTRS] = (nfsd4_dec)nfsd4_decode_listxattrs, - [OP_REMOVEXATTR] = (nfsd4_dec)nfsd4_decode_removexattr, + [OP_GETXATTR] = nfsd4_decode_getxattr, + [OP_SETXATTR] = nfsd4_decode_setxattr, + [OP_LISTXATTRS] = nfsd4_decode_listxattrs, + [OP_REMOVEXATTR] = nfsd4_decode_removexattr, }; static inline bool @@ -3630,8 +3689,10 @@ nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid) } static __be32 -nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) +nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, + union nfsd4_op_u *u) { + struct nfsd4_access *access = &u->access; struct xdr_stream *xdr = resp->xdr; __be32 *p; @@ -3643,8 +3704,10 @@ nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_ return 0; } -static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts) +static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, + union nfsd4_op_u *u) { + struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session; struct xdr_stream *xdr = resp->xdr; __be32 *p; @@ -3660,8 +3723,10 @@ static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, } static __be32 -nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) +nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, + union nfsd4_op_u *u) { + struct nfsd4_close *close = &u->close; struct xdr_stream *xdr = resp->xdr; return nfsd4_encode_stateid(xdr, &close->cl_stateid); @@ -3669,8 +3734,10 @@ nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_c static __be32 -nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) +nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, + union nfsd4_op_u *u) { + struct nfsd4_commit *commit = &u->commit; struct xdr_stream *xdr = resp->xdr; __be32 *p; @@ -3683,8 +3750,10 @@ nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_ } static __be32 -nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) +nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, + union nfsd4_op_u *u) { + struct nfsd4_create *create = &u->create; struct xdr_stream *xdr = resp->xdr; __be32 *p; @@ -3697,8 +3766,10 @@ nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_ } static __be32 -nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) +nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, + union nfsd4_op_u *u) { + struct nfsd4_getattr *getattr = &u->getattr; struct svc_fh *fhp = getattr->ga_fhp; struct xdr_stream *xdr = resp->xdr; @@ -3707,8 +3778,10 @@ nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4 } static __be32 -nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp) +nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, + union nfsd4_op_u *u) { + struct svc_fh **fhpp = &u->getfh; struct xdr_stream *xdr = resp->xdr; struct svc_fh *fhp = *fhpp; unsigned int len; @@ -3762,8 +3835,10 @@ nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld) } static __be32 -nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) +nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, + union nfsd4_op_u *u) { + struct nfsd4_lock *lock = &u->lock; struct xdr_stream *xdr = resp->xdr; if (!nfserr) @@ -3775,8 +3850,10 @@ nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lo } static __be32 -nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) +nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, + union nfsd4_op_u *u) { + struct nfsd4_lockt *lockt = &u->lockt; struct xdr_stream *xdr = resp->xdr; if (nfserr == nfserr_denied) @@ -3785,8 +3862,10 @@ nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_l } static __be32 -nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) +nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, + union nfsd4_op_u *u) { + struct nfsd4_locku *locku = &u->locku; struct xdr_stream *xdr = resp->xdr; return nfsd4_encode_stateid(xdr, &locku->lu_stateid); @@ -3794,8 +3873,10 @@ nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_l static __be32 -nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) +nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, + union nfsd4_op_u *u) { + struct nfsd4_link *link = &u->link; struct xdr_stream *xdr = resp->xdr; __be32 *p; @@ -3808,8 +3889,10 @@ nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_li static __be32 -nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) +nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, + union nfsd4_op_u *u) { + struct nfsd4_open *open = &u->open; struct xdr_stream *xdr = resp->xdr; __be32 *p; @@ -3902,16 +3985,20 @@ nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_op } static __be32 -nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) +nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, + union nfsd4_op_u *u) { + struct nfsd4_open_confirm *oc = &u->open_confirm; struct xdr_stream *xdr = resp->xdr; return nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid); } static __be32 -nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) +nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, + union nfsd4_op_u *u) { + struct nfsd4_open_downgrade *od = &u->open_downgrade; struct xdr_stream *xdr = resp->xdr; return nfsd4_encode_stateid(xdr, &od->od_stateid); @@ -4010,8 +4097,9 @@ static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp, static __be32 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, - struct nfsd4_read *read) + union nfsd4_op_u *u) { + struct nfsd4_read *read = &u->read; bool splice_ok = test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags); unsigned long maxcount; struct xdr_stream *xdr = resp->xdr; @@ -4052,8 +4140,10 @@ nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, } static __be32 -nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) +nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, + union nfsd4_op_u *u) { + struct nfsd4_readlink *readlink = &u->readlink; __be32 *p, *maxcount_p, zero = xdr_zero; struct xdr_stream *xdr = resp->xdr; int length_offset = xdr->buf->len; @@ -4097,8 +4187,10 @@ nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd } static __be32 -nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) +nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, + union nfsd4_op_u *u) { + struct nfsd4_readdir *readdir = &u->readdir; int maxcount; int bytes_left; loff_t offset; @@ -4188,8 +4280,10 @@ nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4 } static __be32 -nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) +nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, + union nfsd4_op_u *u) { + struct nfsd4_remove *remove = &u->remove; struct xdr_stream *xdr = resp->xdr; __be32 *p; @@ -4201,8 +4295,10 @@ nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_ } static __be32 -nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) +nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, + union nfsd4_op_u *u) { + struct nfsd4_rename *rename = &u->rename; struct xdr_stream *xdr = resp->xdr; __be32 *p; @@ -4284,8 +4380,9 @@ nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp) static __be32 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, - struct nfsd4_secinfo *secinfo) + union nfsd4_op_u *u) { + struct nfsd4_secinfo *secinfo = &u->secinfo; struct xdr_stream *xdr = resp->xdr; return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp); @@ -4293,8 +4390,9 @@ nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, static __be32 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr, - struct nfsd4_secinfo_no_name *secinfo) + union nfsd4_op_u *u) { + struct nfsd4_secinfo_no_name *secinfo = &u->secinfo_no_name; struct xdr_stream *xdr = resp->xdr; return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp); @@ -4305,8 +4403,10 @@ nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr, * regardless of the error status. */ static __be32 -nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) +nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, + union nfsd4_op_u *u) { + struct nfsd4_setattr *setattr = &u->setattr; struct xdr_stream *xdr = resp->xdr; __be32 *p; @@ -4329,8 +4429,10 @@ nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4 } static __be32 -nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) +nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, + union nfsd4_op_u *u) { + struct nfsd4_setclientid *scd = &u->setclientid; struct xdr_stream *xdr = resp->xdr; __be32 *p; @@ -4353,8 +4455,10 @@ nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct n } static __be32 -nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) +nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, + union nfsd4_op_u *u) { + struct nfsd4_write *write = &u->write; struct xdr_stream *xdr = resp->xdr; __be32 *p; @@ -4370,8 +4474,9 @@ nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_w static __be32 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr, - struct nfsd4_exchange_id *exid) + union nfsd4_op_u *u) { + struct nfsd4_exchange_id *exid = &u->exchange_id; struct xdr_stream *xdr = resp->xdr; __be32 *p; char *major_id; @@ -4448,8 +4553,9 @@ nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr, static __be32 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr, - struct nfsd4_create_session *sess) + union nfsd4_op_u *u) { + struct nfsd4_create_session *sess = &u->create_session; struct xdr_stream *xdr = resp->xdr; __be32 *p; @@ -4501,8 +4607,9 @@ nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr, static __be32 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr, - struct nfsd4_sequence *seq) + union nfsd4_op_u *u) { + struct nfsd4_sequence *seq = &u->sequence; struct xdr_stream *xdr = resp->xdr; __be32 *p; @@ -4524,8 +4631,9 @@ nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr, static __be32 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr, - struct nfsd4_test_stateid *test_stateid) + union nfsd4_op_u *u) { + struct nfsd4_test_stateid *test_stateid = &u->test_stateid; struct xdr_stream *xdr = resp->xdr; struct nfsd4_test_stateid_id *stateid, *next; __be32 *p; @@ -4545,8 +4653,9 @@ nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr, #ifdef CONFIG_NFSD_PNFS static __be32 nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr, - struct nfsd4_getdeviceinfo *gdev) + union nfsd4_op_u *u) { + struct nfsd4_getdeviceinfo *gdev = &u->getdeviceinfo; struct xdr_stream *xdr = resp->xdr; const struct nfsd4_layout_ops *ops; u32 starting_len = xdr->buf->len, needed_len; @@ -4601,8 +4710,9 @@ nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr, static __be32 nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr, - struct nfsd4_layoutget *lgp) + union nfsd4_op_u *u) { + struct nfsd4_layoutget *lgp = &u->layoutget; struct xdr_stream *xdr = resp->xdr; const struct nfsd4_layout_ops *ops; __be32 *p; @@ -4628,8 +4738,9 @@ nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr, static __be32 nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr, - struct nfsd4_layoutcommit *lcp) + union nfsd4_op_u *u) { + struct nfsd4_layoutcommit *lcp = &u->layoutcommit; struct xdr_stream *xdr = resp->xdr; __be32 *p; @@ -4649,8 +4760,9 @@ nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr, static __be32 nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr, - struct nfsd4_layoutreturn *lrp) + union nfsd4_op_u *u) { + struct nfsd4_layoutreturn *lrp = &u->layoutreturn; struct xdr_stream *xdr = resp->xdr; __be32 *p; @@ -4735,8 +4847,9 @@ nfsd42_encode_nl4_server(struct nfsd4_compoundres *resp, struct nl4_server *ns) static __be32 nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr, - struct nfsd4_copy *copy) + union nfsd4_op_u *u) { + struct nfsd4_copy *copy = &u->copy; __be32 *p; nfserr = nfsd42_encode_write_res(resp, ©->cp_res, @@ -4752,8 +4865,9 @@ nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr, static __be32 nfsd4_encode_offload_status(struct nfsd4_compoundres *resp, __be32 nfserr, - struct nfsd4_offload_status *os) + union nfsd4_op_u *u) { + struct nfsd4_offload_status *os = &u->offload_status; struct xdr_stream *xdr = resp->xdr; __be32 *p; @@ -4803,8 +4917,9 @@ nfsd4_encode_read_plus_data(struct nfsd4_compoundres *resp, static __be32 nfsd4_encode_read_plus(struct nfsd4_compoundres *resp, __be32 nfserr, - struct nfsd4_read *read) + union nfsd4_op_u *u) { + struct nfsd4_read *read = &u->read; struct file *file = read->rd_nf->nf_file; struct xdr_stream *xdr = resp->xdr; int starting_len = xdr->buf->len; @@ -4840,8 +4955,9 @@ nfsd4_encode_read_plus(struct nfsd4_compoundres *resp, __be32 nfserr, static __be32 nfsd4_encode_copy_notify(struct nfsd4_compoundres *resp, __be32 nfserr, - struct nfsd4_copy_notify *cn) + union nfsd4_op_u *u) { + struct nfsd4_copy_notify *cn = &u->copy_notify; struct xdr_stream *xdr = resp->xdr; __be32 *p; @@ -4875,8 +4991,9 @@ nfsd4_encode_copy_notify(struct nfsd4_compoundres *resp, __be32 nfserr, static __be32 nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr, - struct nfsd4_seek *seek) + union nfsd4_op_u *u) { + struct nfsd4_seek *seek = &u->seek; __be32 *p; p = xdr_reserve_space(resp->xdr, 4 + 8); @@ -4887,7 +5004,8 @@ nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr, } static __be32 -nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p) +nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, + union nfsd4_op_u *p) { return nfserr; } @@ -4938,8 +5056,9 @@ nfsd4_vbuf_to_stream(struct xdr_stream *xdr, char *buf, u32 buflen) static __be32 nfsd4_encode_getxattr(struct nfsd4_compoundres *resp, __be32 nfserr, - struct nfsd4_getxattr *getxattr) + union nfsd4_op_u *u) { + struct nfsd4_getxattr *getxattr = &u->getxattr; struct xdr_stream *xdr = resp->xdr; __be32 *p, err; @@ -4962,8 +5081,9 @@ nfsd4_encode_getxattr(struct nfsd4_compoundres *resp, __be32 nfserr, static __be32 nfsd4_encode_setxattr(struct nfsd4_compoundres *resp, __be32 nfserr, - struct nfsd4_setxattr *setxattr) + union nfsd4_op_u *u) { + struct nfsd4_setxattr *setxattr = &u->setxattr; struct xdr_stream *xdr = resp->xdr; __be32 *p; @@ -5003,8 +5123,9 @@ nfsd4_listxattr_validate_cookie(struct nfsd4_listxattrs *listxattrs, static __be32 nfsd4_encode_listxattrs(struct nfsd4_compoundres *resp, __be32 nfserr, - struct nfsd4_listxattrs *listxattrs) + union nfsd4_op_u *u) { + struct nfsd4_listxattrs *listxattrs = &u->listxattrs; struct xdr_stream *xdr = resp->xdr; u32 cookie_offset, count_offset, eof; u32 left, xdrleft, slen, count; @@ -5114,8 +5235,9 @@ nfsd4_encode_listxattrs(struct nfsd4_compoundres *resp, __be32 nfserr, static __be32 nfsd4_encode_removexattr(struct nfsd4_compoundres *resp, __be32 nfserr, - struct nfsd4_removexattr *removexattr) + union nfsd4_op_u *u) { + struct nfsd4_removexattr *removexattr = &u->removexattr; struct xdr_stream *xdr = resp->xdr; __be32 *p; @@ -5127,7 +5249,7 @@ nfsd4_encode_removexattr(struct nfsd4_compoundres *resp, __be32 nfserr, return 0; } -typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *); +typedef __be32(*nfsd4_enc)(struct nfsd4_compoundres *, __be32, union nfsd4_op_u *u); /* * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1 @@ -5135,93 +5257,93 @@ typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *); * done in the decoding phase. */ static const nfsd4_enc nfsd4_enc_ops[] = { - [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access, - [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close, - [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit, - [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create, - [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop, - [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop, - [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr, - [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh, - [OP_LINK] = (nfsd4_enc)nfsd4_encode_link, - [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock, - [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt, - [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku, - [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop, - [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop, - [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop, - [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open, - [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop, - [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm, - [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade, - [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop, - [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop, - [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop, - [OP_READ] = (nfsd4_enc)nfsd4_encode_read, - [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir, - [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink, - [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove, - [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename, - [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop, - [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop, - [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop, - [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo, - [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr, - [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid, - [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop, - [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop, - [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write, - [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop, + [OP_ACCESS] = nfsd4_encode_access, + [OP_CLOSE] = nfsd4_encode_close, + [OP_COMMIT] = nfsd4_encode_commit, + [OP_CREATE] = nfsd4_encode_create, + [OP_DELEGPURGE] = nfsd4_encode_noop, + [OP_DELEGRETURN] = nfsd4_encode_noop, + [OP_GETATTR] = nfsd4_encode_getattr, + [OP_GETFH] = nfsd4_encode_getfh, + [OP_LINK] = nfsd4_encode_link, + [OP_LOCK] = nfsd4_encode_lock, + [OP_LOCKT] = nfsd4_encode_lockt, + [OP_LOCKU] = nfsd4_encode_locku, + [OP_LOOKUP] = nfsd4_encode_noop, + [OP_LOOKUPP] = nfsd4_encode_noop, + [OP_NVERIFY] = nfsd4_encode_noop, + [OP_OPEN] = nfsd4_encode_open, + [OP_OPENATTR] = nfsd4_encode_noop, + [OP_OPEN_CONFIRM] = nfsd4_encode_open_confirm, + [OP_OPEN_DOWNGRADE] = nfsd4_encode_open_downgrade, + [OP_PUTFH] = nfsd4_encode_noop, + [OP_PUTPUBFH] = nfsd4_encode_noop, + [OP_PUTROOTFH] = nfsd4_encode_noop, + [OP_READ] = nfsd4_encode_read, + [OP_READDIR] = nfsd4_encode_readdir, + [OP_READLINK] = nfsd4_encode_readlink, + [OP_REMOVE] = nfsd4_encode_remove, + [OP_RENAME] = nfsd4_encode_rename, + [OP_RENEW] = nfsd4_encode_noop, + [OP_RESTOREFH] = nfsd4_encode_noop, + [OP_SAVEFH] = nfsd4_encode_noop, + [OP_SECINFO] = nfsd4_encode_secinfo, + [OP_SETATTR] = nfsd4_encode_setattr, + [OP_SETCLIENTID] = nfsd4_encode_setclientid, + [OP_SETCLIENTID_CONFIRM] = nfsd4_encode_noop, + [OP_VERIFY] = nfsd4_encode_noop, + [OP_WRITE] = nfsd4_encode_write, + [OP_RELEASE_LOCKOWNER] = nfsd4_encode_noop, /* NFSv4.1 operations */ - [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop, - [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session, - [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id, - [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session, - [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop, - [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop, - [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, + [OP_BACKCHANNEL_CTL] = nfsd4_encode_noop, + [OP_BIND_CONN_TO_SESSION] = nfsd4_encode_bind_conn_to_session, + [OP_EXCHANGE_ID] = nfsd4_encode_exchange_id, + [OP_CREATE_SESSION] = nfsd4_encode_create_session, + [OP_DESTROY_SESSION] = nfsd4_encode_noop, + [OP_FREE_STATEID] = nfsd4_encode_noop, + [OP_GET_DIR_DELEGATION] = nfsd4_encode_noop, #ifdef CONFIG_NFSD_PNFS - [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo, - [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, - [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit, - [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget, - [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn, + [OP_GETDEVICEINFO] = nfsd4_encode_getdeviceinfo, + [OP_GETDEVICELIST] = nfsd4_encode_noop, + [OP_LAYOUTCOMMIT] = nfsd4_encode_layoutcommit, + [OP_LAYOUTGET] = nfsd4_encode_layoutget, + [OP_LAYOUTRETURN] = nfsd4_encode_layoutreturn, #else - [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop, - [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, - [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop, - [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop, - [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop, + [OP_GETDEVICEINFO] = nfsd4_encode_noop, + [OP_GETDEVICELIST] = nfsd4_encode_noop, + [OP_LAYOUTCOMMIT] = nfsd4_encode_noop, + [OP_LAYOUTGET] = nfsd4_encode_noop, + [OP_LAYOUTRETURN] = nfsd4_encode_noop, #endif - [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name, - [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence, - [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop, - [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid, - [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, - [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop, - [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop, + [OP_SECINFO_NO_NAME] = nfsd4_encode_secinfo_no_name, + [OP_SEQUENCE] = nfsd4_encode_sequence, + [OP_SET_SSV] = nfsd4_encode_noop, + [OP_TEST_STATEID] = nfsd4_encode_test_stateid, + [OP_WANT_DELEGATION] = nfsd4_encode_noop, + [OP_DESTROY_CLIENTID] = nfsd4_encode_noop, + [OP_RECLAIM_COMPLETE] = nfsd4_encode_noop, /* NFSv4.2 operations */ - [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, - [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy, - [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_copy_notify, - [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, - [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop, - [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop, - [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop, - [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop, - [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_offload_status, - [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_read_plus, - [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek, - [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop, - [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop, + [OP_ALLOCATE] = nfsd4_encode_noop, + [OP_COPY] = nfsd4_encode_copy, + [OP_COPY_NOTIFY] = nfsd4_encode_copy_notify, + [OP_DEALLOCATE] = nfsd4_encode_noop, + [OP_IO_ADVISE] = nfsd4_encode_noop, + [OP_LAYOUTERROR] = nfsd4_encode_noop, + [OP_LAYOUTSTATS] = nfsd4_encode_noop, + [OP_OFFLOAD_CANCEL] = nfsd4_encode_noop, + [OP_OFFLOAD_STATUS] = nfsd4_encode_offload_status, + [OP_READ_PLUS] = nfsd4_encode_read_plus, + [OP_SEEK] = nfsd4_encode_seek, + [OP_WRITE_SAME] = nfsd4_encode_noop, + [OP_CLONE] = nfsd4_encode_noop, /* RFC 8276 extended atributes operations */ - [OP_GETXATTR] = (nfsd4_enc)nfsd4_encode_getxattr, - [OP_SETXATTR] = (nfsd4_enc)nfsd4_encode_setxattr, - [OP_LISTXATTRS] = (nfsd4_enc)nfsd4_encode_listxattrs, - [OP_REMOVEXATTR] = (nfsd4_enc)nfsd4_encode_removexattr, + [OP_GETXATTR] = nfsd4_encode_getxattr, + [OP_SETXATTR] = nfsd4_encode_setxattr, + [OP_LISTXATTRS] = nfsd4_encode_listxattrs, + [OP_REMOVEXATTR] = nfsd4_encode_removexattr, }; /*