@@ -52,6 +52,9 @@ enum {
RPC_PIPEFS_UMOUNT,
};
+extern struct dentry *rpc_d_lookup_sb(const struct super_block *sb,
+ const unsigned char *dir_name);
+
extern int rpc_queue_upcall(struct inode *, struct rpc_pipe_msg *);
struct rpc_clnt;
@@ -1017,6 +1017,22 @@ static const struct rpc_filelist files[] = {
},
};
+/*
+ * This call can be used only in RPC pipefs mount notification hooks.
+ */
+struct dentry *rpc_d_lookup_sb(const struct super_block *sb,
+ const unsigned char *dir_name)
+{
+ struct qstr dir = {
+ .name = dir_name,
+ .len = strlen(dir_name),
+ .hash = full_name_hash(dir_name, strlen(dir_name)),
+ };
+
+ return d_lookup(sb->s_root, &dir);
+}
+EXPORT_SYMBOL_GPL(rpc_d_lookup_sb);
+
static int
rpc_fill_super(struct super_block *sb, void *data, int silent)
{
In all places, where pipefs dentries are created, only directory inode is actually required to create new dentry. And all this directories has root pipefs dentry as their parent. So we actually don't need this pipefs mount point at all if some pipefs lookup method will be provided. IOW, all we really need is just superblock and simple lookup method to find root's dentry child dentry with appropriate name. And this patch introduces this method. Note, that no loking implemented in rpc_d_lookup_sb(). So it can be used only in case of assurance, that pipefs superblock still exist. IOW, we can use this method only in pipefs mount-umount notificators. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> --- include/linux/sunrpc/rpc_pipe_fs.h | 3 +++ net/sunrpc/rpc_pipe.c | 16 ++++++++++++++++ 2 files changed, 19 insertions(+), 0 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html