From 00ea2df43e0a68a90bb6055cc48965b2c970228d Mon Sep 17 00:00:00 2001 From: "Aneesh Kumar K.V" Date: Mon, 28 Feb 2011 17:04:00 +0530 Subject: [PATCH] fs/9p: Implement syncfs call back for 9Pfs FIXME!! what about dotu ? Signed-off-by: Aneesh Kumar K.V Signed-off-by: Venkateswararao Jujjuri Signed-off-by: Eric Van Hensbergen --- fs/9p/v9fs.h | 1 + fs/9p/vfs_super.c | 33 ++++++++++++++++++++++++--------- 2 files changed, 25 insertions(+), 9 deletions(-) diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h index 6fa3cf5547d..21bd803a3cc 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 76f867cf23f..6985e2a7a11 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, -- 2.20.1