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authorDave Hansen <haveblue@us.ibm.com>2008-02-15 14:37:34 -0800
committerAl Viro <viro@zeniv.linux.org.uk>2008-04-19 00:25:33 -0400
commit0622753b800e4cc6cb9319b36b27658c72dd7cdc (patch)
tree5a32b65a087ff7fd5effa8d3f6f1f9717d4391aa /fs/nfsd/nfs4recover.c
parent49e0d02cf018d4edf24bfc8531a816a26367e4ce (diff)
downloadlinux-0622753b800e4cc6cb9319b36b27658c72dd7cdc.tar.bz2
[PATCH] r/o bind mounts: elevate write count for rmdir and unlink.
Elevate the write count during the vfs_rmdir() and vfs_unlink(). [AV: merged rmdir and unlink parts, added missing pieces in nfsd] Acked-by: Serge Hallyn <serue@us.ibm.com> Acked-by: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/nfsd/nfs4recover.c')
-rw-r--r--fs/nfsd/nfs4recover.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c
index 1ff90625860f..4e77a1a3bd73 100644
--- a/fs/nfsd/nfs4recover.c
+++ b/fs/nfsd/nfs4recover.c
@@ -46,6 +46,7 @@
#include <linux/scatterlist.h>
#include <linux/crypto.h>
#include <linux/sched.h>
+#include <linux/mount.h>
#define NFSDDBG_FACILITY NFSDDBG_PROC
@@ -313,12 +314,17 @@ nfsd4_remove_clid_dir(struct nfs4_client *clp)
if (!rec_dir_init || !clp->cl_firststate)
return;
+ status = mnt_want_write(rec_dir.path.mnt);
+ if (status)
+ goto out;
clp->cl_firststate = 0;
nfs4_save_user(&uid, &gid);
status = nfsd4_unlink_clid_dir(clp->cl_recdir, HEXDIR_LEN-1);
nfs4_reset_user(uid, gid);
if (status == 0)
nfsd4_sync_rec_dir();
+ mnt_drop_write(rec_dir.path.mnt);
+out:
if (status)
printk("NFSD: Failed to remove expired client state directory"
" %.*s\n", HEXDIR_LEN, clp->cl_recdir);
@@ -347,13 +353,17 @@ nfsd4_recdir_purge_old(void) {
if (!rec_dir_init)
return;
+ status = mnt_want_write(rec_dir.path.mnt);
+ if (status)
+ goto out;
status = nfsd4_list_rec_dir(rec_dir.path.dentry, purge_old);
if (status == 0)
nfsd4_sync_rec_dir();
+ mnt_drop_write(rec_dir.path.mnt);
+out:
if (status)
printk("nfsd4: failed to purge old clients from recovery"
" directory %s\n", rec_dir.path.dentry->d_name.name);
- return;
}
static int