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CIFS: use tcon_ipc instead of use_ipc parameter of SMB2_ioctl
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Since IPC now has a tcon object, the caller can just pass it. This
allows domain-based DFS requests to work with smb2+.

Link: https://bugzilla.samba.org/show_bug.cgi?id=12917
Fixes: 9d49640 ("CIFS: implement get_dfs_refer for SMB2+")
Signed-off-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
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Aurelien Aptel authored and Steve French committed Jan 26, 2018
1 parent b327a71 commit 63a83b8
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Showing 4 changed files with 25 additions and 37 deletions.
2 changes: 1 addition & 1 deletion fs/cifs/smb2file.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -74,7 +74,7 @@ smb2_open_file(const unsigned int xid, struct cifs_open_parms *oparms,
nr_ioctl_req.Reserved = 0;
rc = SMB2_ioctl(xid, oparms->tcon, fid->persistent_fid,
fid->volatile_fid, FSCTL_LMR_REQUEST_RESILIENCY,
true /* is_fsctl */, false /* use_ipc */,
true /* is_fsctl */,
(char *)&nr_ioctl_req, sizeof(nr_ioctl_req),
NULL, NULL /* no return info */);
if (rc == -EOPNOTSUPP) {
Expand Down
53 changes: 22 additions & 31 deletions fs/cifs/smb2ops.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -293,7 +293,6 @@ SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)

rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
false /* use_ipc */,
NULL /* no data input */, 0 /* no data input */,
(char **)&out_buf, &ret_data_len);
if (rc != 0)
Expand Down Expand Up @@ -792,7 +791,6 @@ SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,

rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
false /* use_ipc */,
NULL, 0 /* no input */,
(char **)&res_key, &ret_data_len);

Expand Down Expand Up @@ -858,8 +856,7 @@ smb2_copychunk_range(const unsigned int xid,
/* Request server copy to target from src identified by key */
rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
true /* is_fsctl */, false /* use_ipc */,
(char *)pcchunk,
true /* is_fsctl */, (char *)pcchunk,
sizeof(struct copychunk_ioctl), (char **)&retbuf,
&ret_data_len);
if (rc == 0) {
Expand Down Expand Up @@ -1020,7 +1017,7 @@ static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,

rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
true /* is_fctl */, false /* use_ipc */,
true /* is_fctl */,
&setsparse, 1, NULL, NULL);
if (rc) {
tcon->broken_sparse_sup = true;
Expand Down Expand Up @@ -1091,7 +1088,7 @@ smb2_duplicate_extents(const unsigned int xid,
rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
trgtfile->fid.volatile_fid,
FSCTL_DUPLICATE_EXTENTS_TO_FILE,
true /* is_fsctl */, false /* use_ipc */,
true /* is_fsctl */,
(char *)&dup_ext_buf,
sizeof(struct duplicate_extents_to_file),
NULL,
Expand Down Expand Up @@ -1126,7 +1123,7 @@ smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
cfile->fid.volatile_fid,
FSCTL_SET_INTEGRITY_INFORMATION,
true /* is_fsctl */, false /* use_ipc */,
true /* is_fsctl */,
(char *)&integr_info,
sizeof(struct fsctl_set_integrity_information_req),
NULL,
Expand All @@ -1146,7 +1143,7 @@ smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
cfile->fid.volatile_fid,
FSCTL_SRV_ENUMERATE_SNAPSHOTS,
true /* is_fsctl */, false /* use_ipc */,
true /* is_fsctl */,
NULL, 0 /* no input data */,
(char **)&retbuf,
&ret_data_len);
Expand Down Expand Up @@ -1365,16 +1362,20 @@ smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
cifs_dbg(FYI, "smb2_get_dfs_refer path <%s>\n", search_name);

/*
* Use any tcon from the current session. Here, the first one.
* Try to use the IPC tcon, otherwise just use any
*/
spin_lock(&cifs_tcp_ses_lock);
tcon = list_first_entry_or_null(&ses->tcon_list, struct cifs_tcon,
tcon_list);
if (tcon)
tcon->tc_count++;
spin_unlock(&cifs_tcp_ses_lock);
tcon = ses->tcon_ipc;
if (tcon == NULL) {
spin_lock(&cifs_tcp_ses_lock);
tcon = list_first_entry_or_null(&ses->tcon_list,
struct cifs_tcon,
tcon_list);
if (tcon)
tcon->tc_count++;
spin_unlock(&cifs_tcp_ses_lock);
}

if (!tcon) {
if (tcon == NULL) {
cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
ses);
rc = -ENOTCONN;
Expand Down Expand Up @@ -1403,20 +1404,11 @@ smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);

do {
/* try first with IPC */
rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
FSCTL_DFS_GET_REFERRALS,
true /* is_fsctl */, true /* use_ipc */,
true /* is_fsctl */,
(char *)dfs_req, dfs_req_size,
(char **)&dfs_rsp, &dfs_rsp_size);
if (rc == -ENOTCONN) {
/* try with normal tcon */
rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
FSCTL_DFS_GET_REFERRALS,
true /* is_fsctl */, false /*use_ipc*/,
(char *)dfs_req, dfs_req_size,
(char **)&dfs_rsp, &dfs_rsp_size);
}
} while (rc == -EAGAIN);

if (rc) {
Expand All @@ -1435,7 +1427,8 @@ smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
}

out:
if (tcon) {
if (tcon && !tcon->ipc) {
/* ipc tcons are not refcounted */
spin_lock(&cifs_tcp_ses_lock);
tcon->tc_count--;
spin_unlock(&cifs_tcp_ses_lock);
Expand Down Expand Up @@ -1727,8 +1720,7 @@ static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,

rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
true /* is_fctl */, false /* use_ipc */,
(char *)&fsctl_buf,
true /* is_fctl */, (char *)&fsctl_buf,
sizeof(struct file_zero_data_information), NULL, NULL);
free_xid(xid);
return rc;
Expand Down Expand Up @@ -1762,8 +1754,7 @@ static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,

rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
true /* is_fctl */, false /* use_ipc */,
(char *)&fsctl_buf,
true /* is_fctl */, (char *)&fsctl_buf,
sizeof(struct file_zero_data_information), NULL, NULL);
free_xid(xid);
return rc;
Expand Down
4 changes: 1 addition & 3 deletions fs/cifs/smb2pdu.c
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Original file line number Diff line number Diff line change
Expand Up @@ -680,7 +680,6 @@ int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)

rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
false /* use_ipc */,
(char *)&vneg_inbuf, sizeof(struct validate_negotiate_info_req),
(char **)&pneg_rsp, &rsplen);

Expand Down Expand Up @@ -1841,7 +1840,7 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
*/
int
SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
u64 volatile_fid, u32 opcode, bool is_fsctl, bool use_ipc,
u64 volatile_fid, u32 opcode, bool is_fsctl,
char *in_data, u32 indatalen,
char **out_data, u32 *plen /* returned data len */)
{
Expand Down Expand Up @@ -2006,7 +2005,6 @@ SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,

rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
FSCTL_SET_COMPRESSION, true /* is_fsctl */,
false /* use_ipc */,
(char *)&fsctl_input /* data input */,
2 /* in data len */, &ret_data /* out data */, NULL);

Expand Down
3 changes: 1 addition & 2 deletions fs/cifs/smb2proto.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -125,8 +125,7 @@ extern int SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms,
struct smb2_err_rsp **err_buf);
extern int SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon,
u64 persistent_fid, u64 volatile_fid, u32 opcode,
bool is_fsctl, bool use_ipc,
char *in_data, u32 indatalen,
bool is_fsctl, char *in_data, u32 indatalen,
char **out_data, u32 *plen /* returned data len */);
extern int SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
u64 persistent_file_id, u64 volatile_file_id);
Expand Down

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