9p: remove unnecessary v9fses->options which duplicates the mount string

The mount options string is saved in sb->s_options. This patch removes
the redundant duplicating of the mount options. Also, since we are not
displaying anything special in show options, we replace v9fs_show_options
with generic_show_options for now.

Signed-off-by: Abhishek Kulkarni <adkulkar@umail.iu.edu>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

3 files changed, 10 insertions, 35 deletions

diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c
index 332b5ff02fe..f7003cfac63 100644
--- a/fs/9p/v9fs.c
+++ b/fs/9p/v9fs.c
@@ -76,7 +76,7 @@ static const match_table_t tokens = {
  * Return 0 upon success, -ERRNO upon failure.
  */
 
-static int v9fs_parse_options(struct v9fs_session_info *v9ses)
+static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts)
 {
         char *options;
         substring_t args[MAX_OPT_ARGS];
@@ -90,10 +90,10 @@ static int v9fs_parse_options(struct v9fs_session_info *v9ses)
         v9ses->debug = 0;
         v9ses->cache = 0;
 
-        if (!v9ses->options)
+        if (!opts)
                 return 0;
 
-        options = kstrdup(v9ses->options, GFP_KERNEL);
+        options = kstrdup(opts, GFP_KERNEL);
         if (!options) {
                 P9_DPRINTK(P9_DEBUG_ERROR,
                            "failed to allocate copy of option string\n");
@@ -206,24 +206,14 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
         v9ses->uid = ~0;
         v9ses->dfltuid = V9FS_DEFUID;
         v9ses->dfltgid = V9FS_DEFGID;
-        if (data) {
-                v9ses->options = kstrdup(data, GFP_KERNEL);
-                if (!v9ses->options) {
-                        P9_DPRINTK(P9_DEBUG_ERROR,
-                           "failed to allocate copy of option string\n");
-                        retval = -ENOMEM;
-                        goto error;
-                }
-        }
 
-        rc = v9fs_parse_options(v9ses);
+        rc = v9fs_parse_options(v9ses, data);
         if (rc < 0) {
                 retval = rc;
                 goto error;
         }
 
-        v9ses->clnt = p9_client_create(dev_name, v9ses->options);
-
+        v9ses->clnt = p9_client_create(dev_name, data);
         if (IS_ERR(v9ses->clnt)) {
                 retval = PTR_ERR(v9ses->clnt);
                 v9ses->clnt = NULL;
@@ -280,7 +270,6 @@ void v9fs_session_close(struct v9fs_session_info *v9ses)
 
         __putname(v9ses->uname);
         __putname(v9ses->aname);
-        kfree(v9ses->options);
 }
 
 /**
diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h
index a7d56719299..38762bf102a 100644
--- a/fs/9p/v9fs.h
+++ b/fs/9p/v9fs.h
@@ -85,7 +85,6 @@ struct v9fs_session_info {
         unsigned int afid;
         unsigned int cache;
 
-        char *options;          /* copy of mount options */
         char *uname;            /* user name to mount as */
         char *aname;            /* name of remote hierarchy being mounted */
         unsigned int maxdata;   /* max data for client interface */
diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index 072dce09447..8961f1a8f66 100644
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -81,7 +81,7 @@ static int v9fs_set_super(struct super_block *s, void *data)
 
 static void
 v9fs_fill_super(struct super_block *sb, struct v9fs_session_info *v9ses,
-                int flags)
+                int flags, void *data)
 {
         sb->s_maxbytes = MAX_LFS_FILESIZE;
         sb->s_blocksize_bits = fls(v9ses->maxdata - 1);
@@ -91,6 +91,8 @@ v9fs_fill_super(struct super_block *sb, struct v9fs_session_info *v9ses,
 
         sb->s_flags = flags | MS_ACTIVE | MS_SYNCHRONOUS | MS_DIRSYNC |
             MS_NOATIME;
+
+        save_mount_options(sb, data);
 }
 
 /**
@@ -139,7 +141,7 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
                 retval = PTR_ERR(sb);
                 goto free_stat;
         }
-        v9fs_fill_super(sb, v9ses, flags);
+        v9fs_fill_super(sb, v9ses, flags, data);
 
         inode = v9fs_get_inode(sb, S_IFDIR | mode);
         if (IS_ERR(inode)) {
@@ -208,21 +210,6 @@ static void v9fs_kill_super(struct super_block *s)
         P9_DPRINTK(P9_DEBUG_VFS, "exiting kill_super\n");
 }
 
-/**
- * v9fs_show_options - Show mount options in /proc/mounts
- * @m: seq_file to write to
- * @mnt: mount descriptor
- *
- */
-
-static int v9fs_show_options(struct seq_file *m, struct vfsmount *mnt)
-{
-        struct v9fs_session_info *v9ses = mnt->mnt_sb->s_fs_info;
-        if (v9ses->options != NULL)
-                seq_printf(m, ",%s", v9ses->options);
-        return 0;
-}
-
 static void
 v9fs_umount_begin(struct super_block *sb)
 {
@@ -235,7 +222,7 @@ v9fs_umount_begin(struct super_block *sb)
 static const struct super_operations v9fs_super_ops = {
         .statfs = simple_statfs,
         .clear_inode = v9fs_clear_inode,
-        .show_options = v9fs_show_options,
+        .show_options = generic_show_options,
         .umount_begin = v9fs_umount_begin,
 };