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Commit 00ea2df4 authored by Aneesh Kumar K.V's avatar Aneesh Kumar K.V Committed by Eric Van Hensbergen
Browse files

fs/9p: Implement syncfs call back for 9Pfs 



FIXME!! what about dotu ?

Signed-off-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: default avatarVenkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: default avatarEric Van Hensbergen <ericvh@gmail.com>
parent c0aa4caf

fs/9p/v9fs.h

+1 −0
Original line number Diff line number Diff line
@@ -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 *,

fs/9p/vfs_super.c

+24 −9
Original line number Diff line number Diff line
@@ -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 @@ static struct dentry *v9fs_mount(struct file_system_type *fs_type, int flags, 
	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 @@ static int v9fs_statfs(struct dentry *dentry, struct kstatfs *buf) 
	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,