diff options
| author | Steve French <stfrench@microsoft.com> | 2018-04-26 06:19:09 +0300 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2018-05-28 01:56:35 +0300 |
| commit | 3d4ef9a15343f038ccae17f60468569f23113312 (patch) | |
| tree | 78a482f5ff0df0a41853800285f0df1a197851c1 /fs/cifs/smb2proto.h | |
| parent | b04e217704b7f879c6b91222b066983a44a7a09f (diff) | |
| download | linux-3d4ef9a15343f038ccae17f60468569f23113312.tar.xz | |
smb3: fix redundant opens on root
In SMB2/SMB3 unlike in cifs we unnecessarily open the root of the share
over and over again in various places during mount and path revalidation
and also in statfs. This patch cuts redundant traffic (opens and closes)
by simply keeping the directory handle for the root around (and reopening
it as needed on reconnect), so query calls don't require three round
trips to copmlete - just one, and eases load on network, client and
server (on mount alone, cuts network traffic by more than a third).
Also add a new cifs mount parm "nohandlecache" to allow users whose
servers might have resource constraints (eg in case they have a server
with so many users connecting to it that this extra handle per mount
could possibly be a resource concern).
Signed-off-by: Steve French <smfrench@gmail.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Diffstat (limited to 'fs/cifs/smb2proto.h')
| -rw-r--r-- | fs/cifs/smb2proto.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h index 8ba24a95db71..800270b729e2 100644 --- a/fs/cifs/smb2proto.h +++ b/fs/cifs/smb2proto.h @@ -65,6 +65,8 @@ extern struct cifs_ses *smb2_find_smb_ses(struct TCP_Server_Info *server, extern int smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid); +extern int open_shroot(unsigned int xid, struct cifs_tcon *tcon, + struct cifs_fid *pfid); extern void move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src); extern int smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon, |