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authorRonnie Sahlberg <lsahlber@redhat.com>2019-03-12 06:58:31 +0300
committerSteve French <stfrench@microsoft.com>2019-03-15 03:32:35 +0300
commitb0f6df737a1c5d9d5ff90cc946205d8af46cc067 (patch)
tree4f963741384b6f80b0ec03ac420854486dd57da3 /fs/cifs/smb2proto.h
parentab7b10cf4fd14496292c62099f3a0a1c1ef90c0e (diff)
downloadlinux-b0f6df737a1c5d9d5ff90cc946205d8af46cc067.tar.xz
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.h3
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);