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authorRonnie Sahlberg <lsahlber@redhat.com>2019-03-12 13:58:31 +1000
committerSteve French <stfrench@microsoft.com>2019-03-14 19:32:35 -0500
commitb0f6df737a1c5d9d5ff90cc946205d8af46cc067 (patch)
tree4f963741384b6f80b0ec03ac420854486dd57da3 /fs/cifs/cifsglob.h
parentab7b10cf4fd14496292c62099f3a0a1c1ef90c0e (diff)
downloadlinux-b0f6df737a1c5d9d5ff90cc946205d8af46cc067.tar.bz2
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/cifsglob.h')
-rw-r--r--fs/cifs/cifsglob.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index ddb299494cd6..8b9ecf8c2986 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -962,11 +962,14 @@ cap_unix(struct cifs_ses *ses)
struct cached_fid {
bool is_valid:1; /* Do we have a useable root fid */
+ bool file_all_info_is_valid:1;
+
struct kref refcount;
struct cifs_fid *fid;
struct mutex fid_mutex;
struct cifs_tcon *tcon;
struct work_struct lease_break;
+ struct smb2_file_all_info file_all_info;
};
/*