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[PATCH] r/o bind mounts: elevate write count for rmdir and unlink.

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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>
This commit is contained in:
Dave Hansen 2008-02-15 14:37:34 -08:00 • committed by Al Viro
parent 49e0d02cf0
commit 0622753b80
4 changed files with 31 additions and 3 deletions
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5
ipc/mqueue.c
View file

@ -742,8 +742,11 @@ asmlinkage long sys_mq_unlink(const char __user *u_name)
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);