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| author |   Ronnie Sahlberg <lsahlber@redhat.com> | 2019-03-12 13:58:31 +1000 |
|---|---|---|
| committer |   Steve French <stfrench@microsoft.com> | 2019-03-14 19:32:35 -0500 |
| commit | b0f6df737a1c5d9d5ff90cc946205d8af46cc067 (patch) | |
| tree | 4f963741384b6f80b0ec03ac420854486dd57da3 /fs/cifs/smb2proto.h | |
| parent | smb3: display volume serial number for shares in /proc/fs/cifs/DebugData (diff) | |
| download | linux-dev-b0f6df737a1c5d9d5ff90cc946205d8af46cc067.tar.xz linux-dev-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/smb2proto.h')
| -rw-r--r-- | fs/cifs/smb2proto.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h index 87733b27a65f..72cc563c32fe 100644 --- a/fs/cifs/smb2proto.h +++ b/fs/cifs/smb2proto.h @@ -223,6 +223,9 @@ extern int smb3_validate_negotiate(const unsigned int, struct cifs_tcon *); extern enum securityEnum smb2_select_sectype(struct TCP_Server_Info *, enum securityEnum); +extern __u8 smb2_parse_lease_state(struct TCP_Server_Info *server, + struct smb2_create_rsp *rsp, + unsigned int *epoch, char *lease_key); extern int smb3_encryption_required(const struct cifs_tcon *tcon); extern int smb2_validate_iov(unsigned int offset, unsigned int buffer_length, struct kvec *iov, unsigned int min_buf_size); |