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-rw-r--r--fs/cifs/cifs_fs_sb.h1
-rw-r--r--fs/cifs/cifsfs.c2
-rw-r--r--fs/cifs/cifsglob.h1
-rw-r--r--fs/cifs/connect.c8
4 files changed, 11 insertions, 1 deletions
diff --git a/fs/cifs/cifs_fs_sb.h b/fs/cifs/cifs_fs_sb.h
index 1418daa03d95..07ed81cf1552 100644
--- a/fs/cifs/cifs_fs_sb.h
+++ b/fs/cifs/cifs_fs_sb.h
@@ -49,6 +49,7 @@
#define CIFS_MOUNT_USE_PREFIX_PATH 0x1000000 /* make subpath with unaccessible
* root mountable
*/
+#define CIFS_MOUNT_UID_FROM_ACL 0x2000000 /* try to get UID via special SID */
struct cifs_sb_info {
struct rb_root tlink_tree;
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index f963c880c72d..15261ba464c5 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -469,6 +469,8 @@ cifs_show_options(struct seq_file *s, struct dentry *root)
seq_puts(s, ",posixpaths");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
seq_puts(s, ",setuids");
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UID_FROM_ACL)
+ seq_puts(s, ",idsfromsid");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
seq_puts(s, ",serverino");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 0c828d3c48c3..1f17f6bd7a60 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -478,6 +478,7 @@ struct smb_vol {
bool retry:1;
bool intr:1;
bool setuids:1;
+ bool setuidfromacl:1;
bool override_uid:1;
bool override_gid:1;
bool dynperm:1;
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 657369db76df..aab5227979e2 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -75,7 +75,7 @@ enum {
Opt_noposixpaths, Opt_nounix,
Opt_nocase,
Opt_brl, Opt_nobrl,
- Opt_forcemandatorylock, Opt_setuids,
+ Opt_forcemandatorylock, Opt_setuidfromacl, Opt_setuids,
Opt_nosetuids, Opt_dynperm, Opt_nodynperm,
Opt_nohard, Opt_nosoft,
Opt_nointr, Opt_intr,
@@ -147,6 +147,7 @@ static const match_table_t cifs_mount_option_tokens = {
{ Opt_forcemandatorylock, "forcemand" },
{ Opt_setuids, "setuids" },
{ Opt_nosetuids, "nosetuids" },
+ { Opt_setuidfromacl, "idsfromsid" },
{ Opt_dynperm, "dynperm" },
{ Opt_nodynperm, "nodynperm" },
{ Opt_nohard, "nohard" },
@@ -1376,6 +1377,9 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
case Opt_nosetuids:
vol->setuids = 0;
break;
+ case Opt_setuidfromacl:
+ vol->setuidfromacl = 1;
+ break;
case Opt_dynperm:
vol->dynperm = true;
break;
@@ -3279,6 +3283,8 @@ int cifs_setup_cifs_sb(struct smb_vol *pvolume_info,
cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
if (pvolume_info->setuids)
cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
+ if (pvolume_info->setuidfromacl)
+ cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UID_FROM_ACL;
if (pvolume_info->server_ino)
cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
if (pvolume_info->remap)