xfs: only clear the suid bit once in xfs_write
file_remove_suid already calls into ->setattr to clear the suid and
sgid bits if needed, no need to start a second transaction to do it
ourselves.
Note that xfs_write_clear_setuid issues a sync transaction while the
path through ->setattr doesn't, but that is consistant with the
other filesystems.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Alex Elder <aelder@sgi.com>
Signed-off-by: Alex Elder <aelder@sgi.com>
diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c
index c80fa00d..eac6f80 100644
--- a/fs/xfs/linux-2.6/xfs_lrw.c
+++ b/fs/xfs/linux-2.6/xfs_lrw.c
@@ -630,18 +630,9 @@
* by root. This keeps people from modifying setuid and
* setgid binaries.
*/
-
- if (((xip->i_d.di_mode & S_ISUID) ||
- ((xip->i_d.di_mode & (S_ISGID | S_IXGRP)) ==
- (S_ISGID | S_IXGRP))) &&
- !capable(CAP_FSETID)) {
- error = xfs_write_clear_setuid(xip);
- if (likely(!error))
- error = -file_remove_suid(file);
- if (unlikely(error)) {
- goto out_unlock_internal;
- }
- }
+ error = -file_remove_suid(file);
+ if (unlikely(error))
+ goto out_unlock_internal;
/* We can write back this queue in page reclaim */
current->backing_dev_info = mapping->backing_dev_info;
diff --git a/fs/xfs/xfs_rw.c b/fs/xfs/xfs_rw.c
index abb2c45..e336742 100644
--- a/fs/xfs/xfs_rw.c
+++ b/fs/xfs/xfs_rw.c
@@ -47,48 +47,6 @@
#include "xfs_trace.h"
/*
- * This is a subroutine for xfs_write() and other writers (xfs_ioctl)
- * which clears the setuid and setgid bits when a file is written.
- */
-int
-xfs_write_clear_setuid(
- xfs_inode_t *ip)
-{
- xfs_mount_t *mp;
- xfs_trans_t *tp;
- int error;
-
- mp = ip->i_mount;
- tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID);
- if ((error = xfs_trans_reserve(tp, 0,
- XFS_WRITEID_LOG_RES(mp),
- 0, 0, 0))) {
- xfs_trans_cancel(tp, 0);
- return error;
- }
- xfs_ilock(ip, XFS_ILOCK_EXCL);
- xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
- xfs_trans_ihold(tp, ip);
- ip->i_d.di_mode &= ~S_ISUID;
-
- /*
- * Note that we don't have to worry about mandatory
- * file locking being disabled here because we only
- * clear the S_ISGID bit if the Group execute bit is
- * on, but if it was on then mandatory locking wouldn't
- * have been enabled.
- */
- if (ip->i_d.di_mode & S_IXGRP) {
- ip->i_d.di_mode &= ~S_ISGID;
- }
- xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
- xfs_trans_set_sync(tp);
- error = xfs_trans_commit(tp, 0);
- xfs_iunlock(ip, XFS_ILOCK_EXCL);
- return 0;
-}
-
-/*
* Force a shutdown of the filesystem instantly while keeping
* the filesystem consistent. We don't do an unmount here; just shutdown
* the shop, make sure that absolutely nothing persistent happens to
diff --git a/fs/xfs/xfs_rw.h b/fs/xfs/xfs_rw.h
index a54c3b7..11c41ec 100644
--- a/fs/xfs/xfs_rw.h
+++ b/fs/xfs/xfs_rw.h
@@ -39,7 +39,6 @@
/*
* Prototypes for functions in xfs_rw.c.
*/
-extern int xfs_write_clear_setuid(struct xfs_inode *ip);
extern int xfs_read_buf(struct xfs_mount *mp, xfs_buftarg_t *btp,
xfs_daddr_t blkno, int len, uint flags,
struct xfs_buf **bpp);