diff options
| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2010-04-16 16:22:48 -0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2010-05-14 15:09:23 -0400 |
| commit | 04ffdbe2e69beb0f1745f921871fbe0f97dc4697 (patch) | |
| tree | b977a04f4f9a62bdadfc74e2a8669833d65db714 | |
| parent | e1fb4d05d5a3265f1f6769bee034175f91ecc2dd (diff) | |
NFS: Reduce the stack footprint of nfs_follow_remote_path()
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| -rw-r--r-- | fs/nfs/super.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/fs/nfs/super.c b/fs/nfs/super.c index b4148fc00f9f..fa3111eea29a 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -2672,38 +2672,44 @@ out_freepage: static int nfs_follow_remote_path(struct vfsmount *root_mnt, const char *export_path, struct vfsmount *mnt_target) { + struct nameidata *nd = NULL; struct mnt_namespace *ns_private; - struct nameidata nd; struct super_block *s; int ret; + nd = kmalloc(sizeof(*nd), GFP_KERNEL); + if (nd == NULL) + return -ENOMEM; + ns_private = create_mnt_ns(root_mnt); ret = PTR_ERR(ns_private); if (IS_ERR(ns_private)) goto out_mntput; ret = vfs_path_lookup(root_mnt->mnt_root, root_mnt, - export_path, LOOKUP_FOLLOW, &nd); + export_path, LOOKUP_FOLLOW, nd); put_mnt_ns(ns_private); if (ret != 0) goto out_err; - s = nd.path.mnt->mnt_sb; + s = nd->path.mnt->mnt_sb; atomic_inc(&s->s_active); mnt_target->mnt_sb = s; - mnt_target->mnt_root = dget(nd.path.dentry); + mnt_target->mnt_root = dget(nd->path.dentry); /* Correct the device pathname */ - nfs_fix_devname(&nd.path, mnt_target); + nfs_fix_devname(&nd->path, mnt_target); - path_put(&nd.path); + path_put(&nd->path); + kfree(nd); down_write(&s->s_umount); return 0; out_mntput: mntput(root_mnt); out_err: + kfree(nd); return ret; } |