[V9fs-developer,1/2,9P] Add a new access mode, V9FS_ACCESS_CLIENT.

Commit Message

jvrao June 21, 2010, 10:20 p.m. UTC

None

Patch

diff --git a/fs/9p/fid.c b/fs/9p/fid.c
index 5d6cfcb..6e9bb6b 100644
--- a/fs/9p/fid.c
+++ b/fs/9p/fid.c
@@ -121,6 +121,7 @@  struct p9_fid *v9fs_fid_lookup(struct dentry *dentry)
 	switch (access) {
 	case V9FS_ACCESS_SINGLE:
 	case V9FS_ACCESS_USER:
+	case V9FS_ACCESS_CLIENT:
 		uid = current_fsuid();
 		any = 0;
 		break;
diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c
index 3c49201..aac818d 100644
--- a/fs/9p/v9fs.c
+++ b/fs/9p/v9fs.c
@@ -193,6 +193,8 @@  static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts)
 				v9ses->flags |= V9FS_ACCESS_USER;
 			else if (strcmp(s, "any") == 0)
 				v9ses->flags |= V9FS_ACCESS_ANY;
+			else if (strcmp(s, "client") == 0)
+				v9ses->flags |= V9FS_ACCESS_CLIENT;
 			else {
 				v9ses->flags |= V9FS_ACCESS_SINGLE;
 				v9ses->uid = simple_strtoul(s, &e, 10);
@@ -279,7 +281,8 @@  struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
 
 	/* for legacy mode, fall back to V9FS_ACCESS_ANY */
 	if (!(v9fs_proto_dotu(v9ses) || v9fs_proto_dotl(v9ses)) &&
-		((v9ses->flags&V9FS_ACCESS_MASK) == V9FS_ACCESS_USER)) {
+		(((v9ses->flags&V9FS_ACCESS_MASK) == V9FS_ACCESS_USER) ||
+		 ((v9ses->flags&V9FS_ACCESS_MASK) == V9FS_ACCESS_CLIENT))) {
 
 		v9ses->flags &= ~V9FS_ACCESS_MASK;
 		v9ses->flags |= V9FS_ACCESS_ANY;
diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h
index bec4d0b..7268f3c 100644
--- a/fs/9p/v9fs.h
+++ b/fs/9p/v9fs.h
@@ -29,6 +29,7 @@ 
  * @V9FS_ACCESS_SINGLE: only the mounting user can access the hierarchy
  * @V9FS_ACCESS_USER: a new attach will be issued for every user (default)
  * @V9FS_ACCESS_ANY: use a single attach for all users
+ * @V9FS_ACCESS_CLIENT: Like V9FS_ACCESS_USER, but access check on client.
  * @V9FS_ACCESS_MASK: bit mask of different ACCESS options
  *
  * Session flags reflect options selected by users at mount time
@@ -39,7 +40,8 @@  enum p9_session_flags {
 	V9FS_ACCESS_SINGLE	= 0x04,
 	V9FS_ACCESS_USER	= 0x08,
 	V9FS_ACCESS_ANY		= 0x0C,
-	V9FS_ACCESS_MASK	= 0x0C,
+	V9FS_ACCESS_CLIENT	= 0x14,
+	V9FS_ACCESS_MASK	= 0x1C,
 };
 
 /* possible values of ->cache */