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| author | Al Viro <viro@zeniv.linux.org.uk> | 2016-04-15 01:12:42 +0200 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2016-05-03 01:47:24 +0200 |
| commit | 383d4e8ab02c02f7b31f90174c644d935c223c85 (patch) | |
| tree | d2de1aa2da96077c92b2c741872930b5cb9ff6d3 | |
| parent | reiserfs: open-code reiserfs_mutex_lock_safe() in reiserfs_unpack() (diff) | |
| download | linux-383d4e8ab02c02f7b31f90174c644d935c223c85.tar.xz linux-383d4e8ab02c02f7b31f90174c644d935c223c85.zip | |
reconnect_one(): use lookup_one_len_unlocked()
... and explain the non-obvious logics in case when lookup yields
a different dentry.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | fs/exportfs/expfs.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c index c46f1a190b8d..402c5caab5ca 100644 --- a/fs/exportfs/expfs.c +++ b/fs/exportfs/expfs.c @@ -143,14 +143,18 @@ static struct dentry *reconnect_one(struct vfsmount *mnt, if (err) goto out_err; dprintk("%s: found name: %s\n", __func__, nbuf); - inode_lock(parent->d_inode); - tmp = lookup_one_len(nbuf, parent, strlen(nbuf)); - inode_unlock(parent->d_inode); + tmp = lookup_one_len_unlocked(nbuf, parent, strlen(nbuf)); if (IS_ERR(tmp)) { dprintk("%s: lookup failed: %d\n", __func__, PTR_ERR(tmp)); goto out_err; } if (tmp != dentry) { + /* + * Somebody has renamed it since exportfs_get_name(); + * great, since it could've only been renamed if it + * got looked up and thus connected, and it would + * remain connected afterwards. We are done. + */ dput(tmp); goto out_reconnected; } |