1 files changed, 47 insertions, 18 deletions

diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index dbaabe3b8131..09fd08d1606f 100644
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -86,12 +86,15 @@ v9fs_fill_super(struct super_block *sb, struct v9fs_session_info *v9ses,
         } else
                 sb->s_op = &v9fs_super_ops;
         sb->s_bdi = &v9ses->bdi;
+        if (v9ses->cache)
+                sb->s_bdi->ra_pages = (VM_MAX_READAHEAD * 1024)/PAGE_CACHE_SIZE;
 
-        sb->s_flags = flags | MS_ACTIVE | MS_SYNCHRONOUS | MS_DIRSYNC |
-            MS_NOATIME;
+        sb->s_flags = flags | MS_ACTIVE | MS_DIRSYNC | MS_NOATIME;
+        if (!v9ses->cache)
+                sb->s_flags |= MS_SYNCHRONOUS;
 
 #ifdef CONFIG_9P_FS_POSIX_ACL
-        if ((v9ses->flags & V9FS_ACCESS_MASK) == V9FS_ACCESS_CLIENT)
+        if ((v9ses->flags & V9FS_ACL_MASK) == V9FS_POSIX_ACL)
                 sb->s_flags |= MS_POSIXACL;
 #endif
 
@@ -151,7 +154,6 @@ static struct dentry *v9fs_mount(struct file_system_type *fs_type, int flags,
                 retval = PTR_ERR(inode);
                 goto release_sb;
         }
-
         root = d_alloc_root(inode);
         if (!root) {
                 iput(inode);
@@ -166,7 +168,7 @@ static struct dentry *v9fs_mount(struct file_system_type *fs_type, int flags,
                         retval = PTR_ERR(st);
                         goto release_sb;
                 }
-
+                root->d_inode->i_ino = v9fs_qid2ino(&st->qid);
                 v9fs_stat2inode_dotl(st, root->d_inode);
                 kfree(st);
         } else {
@@ -183,10 +185,21 @@ static struct dentry *v9fs_mount(struct file_system_type *fs_type, int flags,
                 p9stat_free(st);
                 kfree(st);
         }
+        v9fs_fid_add(root, fid);
         retval = v9fs_get_acl(inode, fid);
         if (retval)
                 goto release_sb;
-        v9fs_fid_add(root, fid);
+        /*
+         * Add the root fid to session info. This is used
+         * for file system sync. We want a cloned fid here
+         * so that we can do a sync_filesystem after a
+         * shrink_dcache_for_umount
+         */
+        v9ses->root_fid = v9fs_fid_clone(root);
+        if (IS_ERR(v9ses->root_fid)) {
+                retval = PTR_ERR(v9ses->root_fid);
+                goto release_sb;
+        }
 
         P9_DPRINTK(P9_DEBUG_VFS, " simple set mount, return 0\n");
         return dget(sb->s_root);
@@ -197,15 +210,11 @@ close_session:
         v9fs_session_close(v9ses);
         kfree(v9ses);
         return ERR_PTR(retval);
-
 release_sb:
         /*
-         * we will do the session_close and root dentry release
-         * in the below call. But we need to clunk fid, because we haven't
-         * attached the fid to dentry so it won't get clunked
-         * automatically.
+         * we will do the session_close and root dentry
+         * release in the below call.
          */
-        p9_client_clunk(fid);
         deactivate_locked_super(sb);
         return ERR_PTR(retval);
 }
@@ -223,7 +232,7 @@ static void v9fs_kill_super(struct super_block *s)
         P9_DPRINTK(P9_DEBUG_VFS, " %p\n", s);
 
         kill_anon_super(s);
-
+        p9_client_clunk(v9ses->root_fid);
         v9fs_session_cancel(v9ses);
         v9fs_session_close(v9ses);
         kfree(v9ses);
@@ -276,11 +285,31 @@ done:
         return res;
 }
 
+static int v9fs_sync_fs(struct super_block *sb, int wait)
+{
+        struct v9fs_session_info *v9ses = sb->s_fs_info;
+
+        P9_DPRINTK(P9_DEBUG_VFS, "v9fs_sync_fs: super_block %p\n", sb);
+        return p9_client_sync_fs(v9ses->root_fid);
+}
+
+static int v9fs_drop_inode(struct inode *inode)
+{
+        struct v9fs_session_info *v9ses;
+        v9ses = v9fs_inode2v9ses(inode);
+        if (v9ses->cache)
+                return generic_drop_inode(inode);
+        /*
+         * in case of non cached mode always drop the
+         * the inode because we want the inode attribute
+         * to always match that on the server.
+         */
+        return 1;
+}
+
 static const struct super_operations v9fs_super_ops = {
-#ifdef CONFIG_9P_FSCACHE
         .alloc_inode = v9fs_alloc_inode,
         .destroy_inode = v9fs_destroy_inode,
-#endif
         .statfs = simple_statfs,
         .evict_inode = v9fs_evict_inode,
         .show_options = generic_show_options,
@@ -288,11 +317,11 @@ static const struct super_operations v9fs_super_ops = {
 };
 
 static const struct super_operations v9fs_super_ops_dotl = {
-#ifdef CONFIG_9P_FSCACHE
         .alloc_inode = v9fs_alloc_inode,
         .destroy_inode = v9fs_destroy_inode,
-#endif
+        .sync_fs = v9fs_sync_fs,
         .statfs = v9fs_statfs,
+        .drop_inode = v9fs_drop_inode,
         .evict_inode = v9fs_evict_inode,
         .show_options = generic_show_options,
         .umount_begin = v9fs_umount_begin,
@@ -303,5 +332,5 @@ struct file_system_type v9fs_fs_type = {
         .mount = v9fs_mount,
         .kill_sb = v9fs_kill_super,
         .owner = THIS_MODULE,
-        .fs_flags = FS_RENAME_DOES_D_MOVE,
+        .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT,
 };