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Subject[PATCH 08/12] vfs: Remove unnecessary calls of check_submounts_and_drop

Now that check_submounts_and_drop can not fail and is called from
d_invalidate there is no longer a need to call check_submounts_and_drom
from filesystem d_revalidate methods so remove it.

Reviewed-by: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
---
fs/afs/dir.c | 5 -----
fs/fuse/dir.c | 3 ---
fs/gfs2/dentry.c | 3 ---
fs/kernfs/dir.c | 11 -----------
fs/nfs/dir.c | 4 ----
5 files changed, 0 insertions(+), 26 deletions(-)

diff --git a/fs/afs/dir.c b/fs/afs/dir.c
index 529300327f45..a1645b88fe8a 100644
--- a/fs/afs/dir.c
+++ b/fs/afs/dir.c
@@ -669,7 +669,6 @@ static int afs_d_revalidate(struct dentry *dentry, unsigned int flags)

out_valid:
dentry->d_fsdata = dir_version;
-out_skip:
dput(parent);
key_put(key);
_leave(" = 1 [valid]");
@@ -682,10 +681,6 @@ not_found:
spin_unlock(&dentry->d_lock);

out_bad:
- /* don't unhash if we have submounts */
- if (check_submounts_and_drop(dentry) != 0)
- goto out_skip;
-
_debug("dropping dentry %s/%s",
parent->d_name.name, dentry->d_name.name);
dput(parent);
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 1d1292c581c3..5192d0a04d20 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -273,9 +273,6 @@ out:

invalid:
ret = 0;
-
- if (!(flags & LOOKUP_RCU) && check_submounts_and_drop(entry) != 0)
- ret = 1;
goto out;
}

diff --git a/fs/gfs2/dentry.c b/fs/gfs2/dentry.c
index d3a5d4e29ba5..589f4ea9381c 100644
--- a/fs/gfs2/dentry.c
+++ b/fs/gfs2/dentry.c
@@ -93,9 +93,6 @@ invalid_gunlock:
if (!had_lock)
gfs2_glock_dq_uninit(&d_gh);
invalid:
- if (check_submounts_and_drop(dentry) != 0)
- goto valid;
-
dput(parent);
return 0;

diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c
index 5104cf5d25c5..43d5ab905238 100644
--- a/fs/kernfs/dir.c
+++ b/fs/kernfs/dir.c
@@ -296,21 +296,10 @@ static int kernfs_dop_revalidate(struct dentry *dentry, unsigned int flags)
goto out_bad;

mutex_unlock(&kernfs_mutex);
-out_valid:
return 1;
out_bad:
mutex_unlock(&kernfs_mutex);
out_bad_unlocked:
- /*
- * @dentry doesn't match the underlying kernfs node, drop the
- * dentry and force lookup. If we have submounts we must allow the
- * vfs caches to lie about the state of the filesystem to prevent
- * leaks and other nasty things, so use check_submounts_and_drop()
- * instead of d_drop().
- */
- if (check_submounts_and_drop(dentry) != 0)
- goto out_valid;
-
return 0;
}

diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index be38b573495a..a8a2f7f86c45 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1143,10 +1143,6 @@ out_zap_parent:
if (IS_ROOT(dentry))
goto out_valid;
}
- /* If we have submounts, don't unhash ! */
- if (check_submounts_and_drop(dentry) != 0)
- goto out_valid;
-
dput(parent);
dfprintk(LOOKUPCACHE, "NFS: %s(%pd2) is invalid\n",
__func__, dentry);
--
1.7.5.4


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