Signed-off-by: Dave Hansen <haveblue at us.ibm.com> --- 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 2006-12-11 14:22:07.000000000 -0800 +++ lxc-dave/fs/open.c 2006-12-11 14:22:07.000000000 -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: _