[patch 22/22] elevate mnt writers for vfs_unlink() callers
Cedric Le Goater
clg at fr.ibm.com
Thu Jun 7 08:25:49 PDT 2007
From: Dave Hansen <hansendc at us.ibm.com>
Signed-off-by: Dave Hansen <hansendc at us.ibm.com>
---
---
fs/namei.c | 4 ++++
ipc/mqueue.c | 5 ++++-
2 files changed, 8 insertions(+), 1 deletion(-)
Index: 2.6.22-rc4-mm2-robindmount/fs/namei.c
===================================================================
--- 2.6.22-rc4-mm2-robindmount.orig/fs/namei.c
+++ 2.6.22-rc4-mm2-robindmount/fs/namei.c
@@ -2227,7 +2227,11 @@ static long do_unlinkat(int dfd, const c
inode = dentry->d_inode;
if (inode)
atomic_inc(&inode->i_count);
+ error = mnt_want_write(nd.mnt);
+ if (error)
+ goto exit2;
error = vfs_unlink(nd.dentry->d_inode, dentry);
+ mnt_drop_write(nd.mnt);
exit2:
dput(dentry);
}
Index: 2.6.22-rc4-mm2-robindmount/ipc/mqueue.c
===================================================================
--- 2.6.22-rc4-mm2-robindmount.orig/ipc/mqueue.c
+++ 2.6.22-rc4-mm2-robindmount/ipc/mqueue.c
@@ -750,8 +750,11 @@ asmlinkage long sys_mq_unlink(const char
inode = dentry->d_inode;
if (inode)
atomic_inc(&inode->i_count);
-
+ err = mnt_want_write(mqueue_mnt);
+ if (err)
+ goto out_err;
err = vfs_unlink(dentry->d_parent->d_inode, dentry);
+ mnt_drop_write(mqueue_mnt);
out_err:
dput(dentry);
--
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