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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2011-02-28 17:04:00 +0530
committerEric Van Hensbergen <ericvh@gmail.com>2011-03-15 09:57:38 -0500
commit00ea2df43e0a68a90bb6055cc48965b2c970228d (patch)
tree32108151c33c156f9541e97fa3b84e33dae6e92b
parentc0aa4caf4c8b87fa85c67538974a14b07e81a23f (diff)
fs/9p: Implement syncfs call back for 9Pfs
FIXME!! what about dotu ? Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
-rw-r--r--fs/9p/v9fs.h1
-rw-r--r--fs/9p/vfs_super.c33
2 files changed, 25 insertions, 9 deletions
diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h
index 6fa3cf5547d5..21bd803a3cc0 100644
--- a/fs/9p/v9fs.h
+++ b/fs/9p/v9fs.h
@@ -113,6 +113,7 @@ struct v9fs_session_info {
struct list_head slist; /* list of sessions registered with v9fs */
struct backing_dev_info bdi;
struct rw_semaphore rename_sem;
+ struct p9_fid *root_fid; /* Used for file system sync */
};
struct p9_fid *v9fs_session_init(struct v9fs_session_info *, const char *,
diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index 76f867cf23f8..6985e2a7a118 100644
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -152,7 +152,6 @@ 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);
@@ -184,10 +183,21 @@ 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);
@@ -198,15 +208,11 @@ 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);
}
@@ -224,7 +230,7 @@ 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);
@@ -277,6 +283,14 @@ 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 const struct super_operations v9fs_super_ops = {
#ifdef CONFIG_9P_FSCACHE
.alloc_inode = v9fs_alloc_inode,
@@ -293,6 +307,7 @@ static const struct super_operations v9fs_super_ops_dotl = {
.alloc_inode = v9fs_alloc_inode,
.destroy_inode = v9fs_destroy_inode,
#endif
+ .sync_fs = v9fs_sync_fs,
.statfs = v9fs_statfs,
.evict_inode = v9fs_evict_inode,
.show_options = generic_show_options,