summaryrefslogtreecommitdiffstats
path: root/fs/cifs/connect.c
diff options
context:
space:
mode:
authorPavel Shilovsky <piastry@etersoft.ru>2011-05-26 06:02:00 +0000
committerSteve French <sfrench@us.ibm.com>2011-05-27 03:57:16 +0000
commitd4ffff1fa9695c5b5c0bf337e208d8833b88ff2d (patch)
treeacd4b6cfa7962a1cee7e9c81f11bd9ccb0d3ff24 /fs/cifs/connect.c
parent25c7f41e9234f60af30e086278f1de7974f8816f (diff)
downloadop-kernel-dev-d4ffff1fa9695c5b5c0bf337e208d8833b88ff2d.zip
op-kernel-dev-d4ffff1fa9695c5b5c0bf337e208d8833b88ff2d.tar.gz
CIFS: Add rwpidforward mount option
Add rwpidforward mount option that switches on a mode when we forward pid of a process who opened a file to any read and write operation. This can prevent applications like WINE from failing on read or write operation on a previously locked file region from the same netfd from another process if we use mandatory brlock style. It is actual for WINE because during a run of WINE program two processes work on the same netfd - share the same file struct between several VFS fds: 1) WINE-server does open and lock; 2) WINE-application does read and write. Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs/connect.c')
-rw-r--r--fs/cifs/connect.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 261ca81..21bc835 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -1359,6 +1359,8 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
vol->server_ino = 1;
} else if (strnicmp(data, "noserverino", 9) == 0) {
vol->server_ino = 0;
+ } else if (strnicmp(data, "rwpidforward", 4) == 0) {
+ vol->rwpidforward = 1;
} else if (strnicmp(data, "cifsacl", 7) == 0) {
vol->cifs_acl = 1;
} else if (strnicmp(data, "nocifsacl", 9) == 0) {
@@ -2708,6 +2710,8 @@ void cifs_setup_cifs_sb(struct smb_vol *pvolume_info,
cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
if (pvolume_info->mand_lock)
cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
+ if (pvolume_info->rwpidforward)
+ cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD;
if (pvolume_info->cifs_acl)
cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
if (pvolume_info->override_uid)
OpenPOWER on IntegriCloud