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| author | Sachin Prabhu <sprabhu@redhat.com> | 2017-03-03 15:41:38 -0800 |
|---|---|---|
| committer | Steve French <smfrench@gmail.com> | 2017-04-07 08:04:40 -0500 |
| commit | 38bd49064a1ecb67baad33598e3d824448ab11ec (patch) | |
| tree | dd922c0d30ddffd7e0bda9e53ddca5165c1afb84 /fs/cifs/smb2proto.h | |
| parent | 269c930e6698e6afa6d4606bfd241f4497597e79 (diff) | |
| download | linux-38bd49064a1ecb67baad33598e3d824448ab11ec.tar.bz2 | |
Handle mismatched open calls
A signal can interrupt a SendReceive call which result in incoming
responses to the call being ignored. This is a problem for calls such as
open which results in the successful response being ignored. This
results in an open file resource on the server.
The patch looks into responses which were cancelled after being sent and
in case of successful open closes the open fids.
For this patch, the check is only done in SendReceive2()
RH-bz: 1403319
Signed-off-by: Sachin Prabhu <sprabhu@redhat.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Cc: Stable <stable@vger.kernel.org>
Diffstat (limited to 'fs/cifs/smb2proto.h')
| -rw-r--r-- | fs/cifs/smb2proto.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h index 69e35873b1de..6853454fc871 100644 --- a/fs/cifs/smb2proto.h +++ b/fs/cifs/smb2proto.h @@ -48,6 +48,10 @@ extern struct mid_q_entry *smb2_setup_request(struct cifs_ses *ses, struct smb_rqst *rqst); extern struct mid_q_entry *smb2_setup_async_request( struct TCP_Server_Info *server, struct smb_rqst *rqst); +extern struct cifs_ses *smb2_find_smb_ses(struct TCP_Server_Info *server, + __u64 ses_id); +extern struct cifs_tcon *smb2_find_smb_tcon(struct TCP_Server_Info *server, + __u64 ses_id, __u32 tid); extern int smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server); extern int smb3_calc_signature(struct smb_rqst *rqst, @@ -164,6 +168,9 @@ extern int SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, extern int SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon, const u64 persistent_fid, const u64 volatile_fid, const __u8 oplock_level); +extern int smb2_handle_cancelled_mid(char *buffer, + struct TCP_Server_Info *server); +void smb2_cancelled_close_fid(struct work_struct *work); extern int SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_file_id, u64 volatile_file_id, struct kstatfs *FSData); |