[PATCH 13/22] elevate writer count for do_sys_truncate()

[Dave Hansen]

Signed-off-by: Dave Hansen <[EMAIL PROTECTED]>
---

 lxc-dave/fs/open.c |   16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff -puN fs/open.c~15-24-elevate-writer-count-for-do-sys-truncate fs/open.c
--- lxc/fs/open.c~15-24-elevate-writer-count-for-do-sys-truncate        
2007-02-09 14:26:55.000000000 -0800
+++ lxc-dave/fs/open.c  2007-02-09 14:26:55.000000000 -0800
@@ -241,28 +241,32 @@ static long do_sys_truncate(const char _
        if (!S_ISREG(inode->i_mode))
                goto dput_and_out;
 
-       error = vfs_permission(&nd, MAY_WRITE);
+       error = mnt_want_write(nd.mnt);
        if (error)
                goto dput_and_out;
 
+       error = vfs_permission(&nd, MAY_WRITE);
+       if (error)
+               goto mnt_drop_write_and_out;
+
        error = -EROFS;
        if (IS_RDONLY(inode))
-               goto dput_and_out;
+               goto mnt_drop_write_and_out;
 
        error = -EPERM;
        if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
-               goto dput_and_out;
+               goto mnt_drop_write_and_out;
 
        /*
         * Make sure that there are no leases.
         */
        error = break_lease(inode, FMODE_WRITE);
        if (error)
-               goto dput_and_out;
+               goto mnt_drop_write_and_out;
 
        error = get_write_access(inode);
        if (error)
-               goto dput_and_out;
+               goto mnt_drop_write_and_out;
 
        error = locks_verify_truncate(inode, NULL, length);
        if (!error) {
@@ -271,6 +275,8 @@ static long do_sys_truncate(const char _
        }
        put_write_access(inode);
 
+mnt_drop_write_and_out:
+       mnt_drop_write(nd.mnt);
 dput_and_out:
        path_release(&nd);
 out:
_
-
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