diff options
| author | Ronnie Sahlberg | 2019-03-12 04:58:31 +0100 |
|---|---|---|
| committer | Steve French | 2019-03-15 01:32:35 +0100 |
| commit | b0f6df737a1c5d9d5ff90cc946205d8af46cc067 (patch) | |
| tree | 4f963741384b6f80b0ec03ac420854486dd57da3 /fs/cifs/smb2pdu.c | |
| parent | smb3: display volume serial number for shares in /proc/fs/cifs/DebugData (diff) | |
| download | kernel-qcow2-linux-b0f6df737a1c5d9d5ff90cc946205d8af46cc067.tar.gz kernel-qcow2-linux-b0f6df737a1c5d9d5ff90cc946205d8af46cc067.tar.xz kernel-qcow2-linux-b0f6df737a1c5d9d5ff90cc946205d8af46cc067.zip | |
cifs: cache FILE_ALL_INFO for the shared root handle
When we open the shared root handle also ask for FILE_ALL_INFORMATION since
we can do this at zero cost as part of a compound.
Cache this information as long as the lease is held and return and serve any
future requests from cache.
This allows us to serve "stat /<mountpoint>" directly from cache and avoid
a network roundtrip. Since clients often want to do this quite a lot
this improve performance slightly.
As an example: xfstest generic/533 performs 43 stat operations on the root
of the share while it is run. Which are eliminated with this patch.
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Diffstat (limited to 'fs/cifs/smb2pdu.c')
| -rw-r--r-- | fs/cifs/smb2pdu.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index 60fbe306f604..cfe9fe41ccf5 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -1797,9 +1797,10 @@ create_reconnect_durable_buf(struct cifs_fid *fid) return buf; } -static __u8 -parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp, - unsigned int *epoch, char *lease_key) +__u8 +smb2_parse_lease_state(struct TCP_Server_Info *server, + struct smb2_create_rsp *rsp, + unsigned int *epoch, char *lease_key) { char *data_offset; struct create_context *cc; @@ -2456,8 +2457,9 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path, } if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) - *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch, - oparms->fid->lease_key); + *oplock = smb2_parse_lease_state(server, rsp, + &oparms->fid->epoch, + oparms->fid->lease_key); else *oplock = rsp->OplockLevel; creat_exit: |