Commit 199037c5 authored Feb 05, 2008 by Christoph Hellwig Committed by Lachlan McIlroy Feb 07, 2008

[XFS] remove permission check from xfs_change_file_space



Both callers of xfs_change_file_space alreaedy do the file->f_mode &
FMODE_WRITE check to ensure we have a file descriptor that has been opened
for write mode, so there is no need to re-check that with xfs_iaccess.
Especially as the later might wrongly deny it for corner cases like file
descriptor passing through unix domain sockets.

SGI-PV: 971186
SGI-Modid: xfs-linux-melb:xfs-kern:30365a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>

parent 9742bb93

fs/xfs/xfs_vnodeops.c

+0 −12

Original line number	Diff line number	Diff line
		@@ -4317,21 +4317,9 @@ xfs_change_file_space(

		xfs_itrace_entry(ip);

		/*
		* must be a regular file and have write permission
		*/
		if (!S_ISREG(ip->i_d.di_mode))
		return XFS_ERROR(EINVAL);

		xfs_ilock(ip, XFS_ILOCK_SHARED);

		if ((error = xfs_iaccess(ip, S_IWUSR, credp))) {
		xfs_iunlock(ip, XFS_ILOCK_SHARED);
		return error;
		}

		xfs_iunlock(ip, XFS_ILOCK_SHARED);

		switch (bf->l_whence) {
		case 0: /SEEK_SET/
		break;