AUTOFS3: Make sure all dentries refs are released before calling kill_anon_super()

David Howells
2006-10-17T16:18:35Z

Make sure all dentries refs are released before calling kill_anon_super() so
that the assumption that generic_shutdown_super() can completely destroy the
dentry tree for there will be no external references holds true.

What was being done in the put_super() superblock op, is now done in the
kill_sb() filesystem op instead, prior to calling kill_anon_super().

The call to shrink_dcache_sb() is removed as it is redundant since
shrink_dcache_for_umount() will now be called after the cleanup routine.

Signed-off-by: David Howells <dhowells@redhat.com>
---

fs/autofs/autofs_i.h | 1 +
fs/autofs/dirhash.c | 1 -
fs/autofs/init.c | 2 +-
fs/autofs/inode.c | 4 ++--
4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/fs/autofs/autofs_i.h b/fs/autofs/autofs_i.h
index c7700d9..906ba5c 100644
--- a/fs/autofs/autofs_i.h
+++ b/fs/autofs/autofs_i.h
@@ -149,6 +149,7 @@ extern const struct file_operations auto
/* Initializing function */

int autofs_fill_super(struct super_block *, void *, int);
+void autofs_kill_sb(struct super_block *sb);

/* Queue management functions */

diff --git a/fs/autofs/dirhash.c b/fs/autofs/dirhash.c
index 3fded38..bf8c8af 100644
--- a/fs/autofs/dirhash.c
+++ b/fs/autofs/dirhash.c
@@ -246,5 +246,4 @@ void autofs_hash_nuke(struct autofs_sb_i
kfree(ent);
}
}
- shrink_dcache_sb(sbi->sb);
}
diff --git a/fs/autofs/init.c b/fs/autofs/init.c
index aca1237..cea5219 100644
--- a/fs/autofs/init.c
+++ b/fs/autofs/init.c
@@ -24,7 +24,7 @@ static struct file_system_type autofs_fs
.owner = THIS_MODULE,
.name = "autofs",
.get_sb = autofs_get_sb,
- .kill_sb = kill_anon_super,
+ .kill_sb = autofs_kill_sb,
};

static int __init init_autofs_fs(void)
diff --git a/fs/autofs/inode.c b/fs/autofs/inode.c
index 2c9759b..54c518c 100644
--- a/fs/autofs/inode.c
+++ b/fs/autofs/inode.c
@@ -20,7 +20,7 @@ #include <linux/magic.h>
#include "autofs_i.h"
#include <linux/module.h>

-static void autofs_put_super(struct super_block *sb)
+void autofs_kill_sb(struct super_block *sb)
{
struct autofs_sb_info *sbi = autofs_sbi(sb);
unsigned int n;
@@ -37,13 +37,13 @@ static void autofs_put_super(struct supe
kfree(sb->s_fs_info);

DPRINTK(("autofs: shutting down\n"));
+ kill_anon_super(sb);
}

static void autofs_read_inode(struct inode *inode);

static struct super_operations autofs_sops = {
.read_inode = autofs_read_inode,
- .put_super = autofs_put_super,
.statfs = simple_statfs,
};