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NFS: Don't let nfs_end_data_update() clobber attribute update informa…
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…tion

 Since we almost always call nfs_end_data_update() after we called
 nfs_refresh_inode(), we now end up marking the inode metadata
 as needing revalidation immediately after having updated it.

 This patch rearranges things so that we mark the inode as needing
 revalidation _before_ we call nfs_refresh_inode() on those operations
 that need it.

 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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Trond Myklebust authored and Trond Myklebust committed Oct 28, 2005
1 parent 3380114 commit decf491
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Showing 5 changed files with 73 additions and 29 deletions.
38 changes: 32 additions & 6 deletions fs/nfs/inode.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -1236,13 +1236,12 @@ void nfs_end_data_update(struct inode *inode)
struct nfs_inode *nfsi = NFS_I(inode);

if (!nfs_have_delegation(inode, FMODE_READ)) {
/* Mark the attribute cache for revalidation */
spin_lock(&inode->i_lock);
nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
/* Directories and symlinks: invalidate page cache too */
if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))
/* Directories and symlinks: invalidate page cache */
if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) {
spin_lock(&inode->i_lock);
nfsi->cache_validity |= NFS_INO_INVALID_DATA;
spin_unlock(&inode->i_lock);
spin_unlock(&inode->i_lock);
}
}
nfsi->cache_change_attribute = jiffies;
atomic_dec(&nfsi->data_updates);
Expand Down Expand Up @@ -1360,6 +1359,33 @@ int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
return status;
}

/**
* nfs_post_op_update_inode - try to update the inode attribute cache
* @inode - pointer to inode
* @fattr - updated attributes
*
* After an operation that has changed the inode metadata, mark the
* attribute cache as being invalid, then try to update it.
*/
int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
{
struct nfs_inode *nfsi = NFS_I(inode);
int status = 0;

spin_lock(&inode->i_lock);
if (unlikely((fattr->valid & NFS_ATTR_FATTR) == 0)) {
nfsi->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS;
goto out;
}
status = nfs_update_inode(inode, fattr, fattr->time_start);
if (time_after_eq(fattr->time_start, nfsi->cache_change_attribute))
nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME|NFS_INO_REVAL_PAGECACHE);
nfsi->cache_change_attribute = jiffies;
out:
spin_unlock(&inode->i_lock);
return status;
}

/*
* Many nfs protocol calls return the new file attributes after
* an operation. Here we update the inode to reflect the state
Expand Down
30 changes: 15 additions & 15 deletions fs/nfs/nfs3proc.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -266,7 +266,7 @@ static int nfs3_proc_write(struct nfs_write_data *wdata)
nfs_fattr_init(fattr);
status = rpc_call_sync(NFS_CLIENT(inode), &msg, rpcflags);
if (status >= 0)
nfs_refresh_inode(inode, fattr);
nfs_post_op_update_inode(inode, fattr);
dprintk("NFS reply write: %d\n", status);
return status < 0? status : wdata->res.count;
}
Expand All @@ -288,7 +288,7 @@ static int nfs3_proc_commit(struct nfs_write_data *cdata)
nfs_fattr_init(fattr);
status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
if (status >= 0)
nfs_refresh_inode(inode, fattr);
nfs_post_op_update_inode(inode, fattr);
dprintk("NFS reply commit: %d\n", status);
return status;
}
Expand Down Expand Up @@ -332,7 +332,7 @@ nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
nfs_fattr_init(&dir_attr);
nfs_fattr_init(&fattr);
status = rpc_call(NFS_CLIENT(dir), NFS3PROC_CREATE, &arg, &res, 0);
nfs_refresh_inode(dir, &dir_attr);
nfs_post_op_update_inode(dir, &dir_attr);

/* If the server doesn't support the exclusive creation semantics,
* try again with simple 'guarded' mode. */
Expand Down Expand Up @@ -403,7 +403,7 @@ nfs3_proc_remove(struct inode *dir, struct qstr *name)
dprintk("NFS call remove %s\n", name->name);
nfs_fattr_init(&dir_attr);
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_refresh_inode(dir, &dir_attr);
nfs_post_op_update_inode(dir, &dir_attr);
dprintk("NFS reply remove: %d\n", status);
return status;
}
Expand Down Expand Up @@ -439,7 +439,7 @@ nfs3_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
return 1;
if (msg->rpc_argp) {
dir_attr = (struct nfs_fattr*)msg->rpc_resp;
nfs_refresh_inode(dir->d_inode, dir_attr);
nfs_post_op_update_inode(dir->d_inode, dir_attr);
kfree(msg->rpc_argp);
}
return 0;
Expand Down Expand Up @@ -468,8 +468,8 @@ nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name,
nfs_fattr_init(&old_dir_attr);
nfs_fattr_init(&new_dir_attr);
status = rpc_call(NFS_CLIENT(old_dir), NFS3PROC_RENAME, &arg, &res, 0);
nfs_refresh_inode(old_dir, &old_dir_attr);
nfs_refresh_inode(new_dir, &new_dir_attr);
nfs_post_op_update_inode(old_dir, &old_dir_attr);
nfs_post_op_update_inode(new_dir, &new_dir_attr);
dprintk("NFS reply rename: %d\n", status);
return status;
}
Expand All @@ -494,8 +494,8 @@ nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
nfs_fattr_init(&dir_attr);
nfs_fattr_init(&fattr);
status = rpc_call(NFS_CLIENT(inode), NFS3PROC_LINK, &arg, &res, 0);
nfs_refresh_inode(dir, &dir_attr);
nfs_refresh_inode(inode, &fattr);
nfs_post_op_update_inode(dir, &dir_attr);
nfs_post_op_update_inode(inode, &fattr);
dprintk("NFS reply link: %d\n", status);
return status;
}
Expand Down Expand Up @@ -527,7 +527,7 @@ nfs3_proc_symlink(struct inode *dir, struct qstr *name, struct qstr *path,
nfs_fattr_init(&dir_attr);
nfs_fattr_init(fattr);
status = rpc_call(NFS_CLIENT(dir), NFS3PROC_SYMLINK, &arg, &res, 0);
nfs_refresh_inode(dir, &dir_attr);
nfs_post_op_update_inode(dir, &dir_attr);
dprintk("NFS reply symlink: %d\n", status);
return status;
}
Expand Down Expand Up @@ -558,7 +558,7 @@ nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
nfs_fattr_init(&dir_attr);
nfs_fattr_init(&fattr);
status = rpc_call(NFS_CLIENT(dir), NFS3PROC_MKDIR, &arg, &res, 0);
nfs_refresh_inode(dir, &dir_attr);
nfs_post_op_update_inode(dir, &dir_attr);
if (status != 0)
goto out;
status = nfs_instantiate(dentry, &fhandle, &fattr);
Expand All @@ -584,7 +584,7 @@ nfs3_proc_rmdir(struct inode *dir, struct qstr *name)
dprintk("NFS call rmdir %s\n", name->name);
nfs_fattr_init(&dir_attr);
status = rpc_call(NFS_CLIENT(dir), NFS3PROC_RMDIR, &arg, &dir_attr, 0);
nfs_refresh_inode(dir, &dir_attr);
nfs_post_op_update_inode(dir, &dir_attr);
dprintk("NFS reply rmdir: %d\n", status);
return status;
}
Expand Down Expand Up @@ -679,7 +679,7 @@ nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
nfs_fattr_init(&dir_attr);
nfs_fattr_init(&fattr);
status = rpc_call(NFS_CLIENT(dir), NFS3PROC_MKNOD, &arg, &res, 0);
nfs_refresh_inode(dir, &dir_attr);
nfs_post_op_update_inode(dir, &dir_attr);
if (status != 0)
goto out;
status = nfs_instantiate(dentry, &fh, &fattr);
Expand Down Expand Up @@ -775,7 +775,7 @@ nfs3_write_done(struct rpc_task *task)
return;
data = (struct nfs_write_data *)task->tk_calldata;
if (task->tk_status >= 0)
nfs_refresh_inode(data->inode, data->res.fattr);
nfs_post_op_update_inode(data->inode, data->res.fattr);
nfs_writeback_done(task);
}

Expand Down Expand Up @@ -819,7 +819,7 @@ nfs3_commit_done(struct rpc_task *task)
return;
data = (struct nfs_write_data *)task->tk_calldata;
if (task->tk_status >= 0)
nfs_refresh_inode(data->inode, data->res.fattr);
nfs_post_op_update_inode(data->inode, data->res.fattr);
nfs_commit_done(task);
}

Expand Down
3 changes: 3 additions & 0 deletions fs/nfs/nfs4proc.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -187,8 +187,11 @@ static void update_changeattr(struct inode *inode, struct nfs4_change_info *cinf
{
struct nfs_inode *nfsi = NFS_I(inode);

spin_lock(&inode->i_lock);
nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
if (cinfo->before == nfsi->change_attr && cinfo->atomic)
nfsi->change_attr = cinfo->after;
spin_unlock(&inode->i_lock);
}

/* Helper for asynchronous RPC calls */
Expand Down
16 changes: 13 additions & 3 deletions fs/nfs/proc.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -206,7 +206,7 @@ static int nfs_proc_write(struct nfs_write_data *wdata)
nfs_fattr_init(fattr);
status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags);
if (status >= 0) {
nfs_refresh_inode(inode, fattr);
nfs_post_op_update_inode(inode, fattr);
wdata->res.count = wdata->args.count;
wdata->verf.committed = NFS_FILE_SYNC;
}
Expand Down Expand Up @@ -275,6 +275,7 @@ nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,

nfs_fattr_init(&fattr);
status = rpc_call(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, 0);
nfs_mark_for_revalidate(dir);

if (status == -EINVAL && S_ISFIFO(mode)) {
sattr->ia_mode = mode;
Expand Down Expand Up @@ -305,6 +306,7 @@ nfs_proc_remove(struct inode *dir, struct qstr *name)

dprintk("NFS call remove %s\n", name->name);
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_mark_for_revalidate(dir);

dprintk("NFS reply remove: %d\n", status);
return status;
Expand All @@ -331,8 +333,10 @@ nfs_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
{
struct rpc_message *msg = &task->tk_msg;

if (msg->rpc_argp)
if (msg->rpc_argp) {
nfs_mark_for_revalidate(dir->d_inode);
kfree(msg->rpc_argp);
}
return 0;
}

Expand All @@ -352,6 +356,8 @@ nfs_proc_rename(struct inode *old_dir, struct qstr *old_name,

dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name);
status = rpc_call(NFS_CLIENT(old_dir), NFSPROC_RENAME, &arg, NULL, 0);
nfs_mark_for_revalidate(old_dir);
nfs_mark_for_revalidate(new_dir);
dprintk("NFS reply rename: %d\n", status);
return status;
}
Expand All @@ -369,6 +375,7 @@ nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)

dprintk("NFS call link %s\n", name->name);
status = rpc_call(NFS_CLIENT(inode), NFSPROC_LINK, &arg, NULL, 0);
nfs_mark_for_revalidate(dir);
dprintk("NFS reply link: %d\n", status);
return status;
}
Expand All @@ -394,6 +401,7 @@ nfs_proc_symlink(struct inode *dir, struct qstr *name, struct qstr *path,
nfs_fattr_init(fattr);
fhandle->size = 0;
status = rpc_call(NFS_CLIENT(dir), NFSPROC_SYMLINK, &arg, NULL, 0);
nfs_mark_for_revalidate(dir);
dprintk("NFS reply symlink: %d\n", status);
return status;
}
Expand All @@ -418,6 +426,7 @@ nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
dprintk("NFS call mkdir %s\n", dentry->d_name.name);
nfs_fattr_init(&fattr);
status = rpc_call(NFS_CLIENT(dir), NFSPROC_MKDIR, &arg, &res, 0);
nfs_mark_for_revalidate(dir);
if (status == 0)
status = nfs_instantiate(dentry, &fhandle, &fattr);
dprintk("NFS reply mkdir: %d\n", status);
Expand All @@ -436,6 +445,7 @@ nfs_proc_rmdir(struct inode *dir, struct qstr *name)

dprintk("NFS call rmdir %s\n", name->name);
status = rpc_call(NFS_CLIENT(dir), NFSPROC_RMDIR, &arg, NULL, 0);
nfs_mark_for_revalidate(dir);
dprintk("NFS reply rmdir: %d\n", status);
return status;
}
Expand Down Expand Up @@ -579,7 +589,7 @@ nfs_write_done(struct rpc_task *task)
struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata;

if (task->tk_status >= 0)
nfs_refresh_inode(data->inode, data->res.fattr);
nfs_post_op_update_inode(data->inode, data->res.fattr);
nfs_writeback_done(task);
}

Expand Down
15 changes: 10 additions & 5 deletions include/linux/nfs_fs.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -241,13 +241,17 @@ static inline int nfs_caches_unstable(struct inode *inode)
return atomic_read(&NFS_I(inode)->data_updates) != 0;
}

static inline void nfs_mark_for_revalidate(struct inode *inode)
{
spin_lock(&inode->i_lock);
NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS;
spin_unlock(&inode->i_lock);
}

static inline void NFS_CACHEINV(struct inode *inode)
{
if (!nfs_caches_unstable(inode)) {
spin_lock(&inode->i_lock);
NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS;
spin_unlock(&inode->i_lock);
}
if (!nfs_caches_unstable(inode))
nfs_mark_for_revalidate(inode);
}

static inline int nfs_server_capable(struct inode *inode, int cap)
Expand Down Expand Up @@ -291,6 +295,7 @@ extern void nfs_zap_caches(struct inode *);
extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *,
struct nfs_fattr *);
extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *);
extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr);
extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
extern int nfs_permission(struct inode *, int, struct nameidata *);
extern int nfs_access_get_cached(struct inode *, struct rpc_cred *, struct nfs_access_entry *);
Expand Down

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