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[XFS] Ensure errors from xfs_bdstrat() are correctly checked. 

xfsbdstrat() is declared to return an error. That is never checked because
the error is propagated by the xfs_buf_t that is passed through the
function.

Mark xfsbdstrat() as returning void and comment the prototype on the
methods needed for error checking.

SGI-PV: 980084
SGI-Modid: xfs-linux-melb:xfs-kern:30823a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Niv Sardi <xaiki@sgi.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
This commit is contained in:
David Chinner 2008-04-10 12:22:17 +10:00 committed by Lachlan McIlroy
parent 556b8b166c
commit d64e31a2f5
6 changed files with 21 additions and 26 deletions
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19
fs/xfs/linux-2.6/xfs_lrw.c
View File

@ -875,28 +875,21 @@ xfs_bdstrat_cb(struct xfs_buf *bp)
}
/*
* Wrapper around bdstrat so that we can stop data
* from going to disk in case we are shutting down the filesystem.
* Typically user data goes thru this path; one of the exceptions
* is the superblock.
* Wrapper around bdstrat so that we can stop data from going to disk in case
* we are shutting down the filesystem. Typically user data goes thru this
* path; one of the exceptions is the superblock.
*/
int
void
xfsbdstrat(
struct xfs_mount *mp,
struct xfs_buf *bp)
{
ASSERT(mp);
if (!XFS_FORCED_SHUTDOWN(mp)) {
/* Grio redirection would go here
* if (XFS_BUF_IS_GRIO(bp)) {
*/
if (!XFS_FORCED_SHUTDOWN(mp))
xfs_buf_iorequest(bp);
return 0;
}
xfs_buftrace("XFSBDSTRAT IOERROR", bp);
return (xfs_bioerror_relse(bp));
xfs_bioerror_relse(bp);
}
/*

3
fs/xfs/linux-2.6/xfs_lrw.h
View File

@ -68,7 +68,8 @@ extern void xfs_inval_cached_trace(struct xfs_inode *,
#define xfs_inval_cached_trace(ip, offset, len, first, last)
#endif
extern int xfsbdstrat(struct xfs_mount *, struct xfs_buf *);
/* errors from xfsbdstrat() must be extracted from the buffer */
extern void xfsbdstrat(struct xfs_mount *, struct xfs_buf *);
extern int xfs_bdstrat_cb(struct xfs_buf *);
extern int xfs_dev_is_read_only(struct xfs_mount *, char *);

6
fs/xfs/xfs_log_recover.c
View File

@ -121,7 +121,8 @@ xlog_bread(
XFS_BUF_SET_TARGET(bp, log->l_mp->m_logdev_targp);
xfsbdstrat(log->l_mp, bp);
if ((error = xfs_iowait(bp)))
error = xfs_iowait(bp);
if (error)
xfs_ioerror_alert("xlog_bread", log->l_mp,
bp, XFS_BUF_ADDR(bp));
return error;
@ -3849,7 +3850,8 @@ xlog_do_recover(
XFS_BUF_READ(bp);
XFS_BUF_UNASYNC(bp);
xfsbdstrat(log->l_mp, bp);
if ((error = xfs_iowait(bp))) {
error = xfs_iowait(bp);
if (error) {
xfs_ioerror_alert("xlog_do_recover",
log->l_mp, bp, XFS_BUF_ADDR(bp));
ASSERT(0);

1
fs/xfs/xfs_mount.c
View File

@ -1470,7 +1470,6 @@ xfs_unmountfs_writesb(xfs_mount_t *mp)
XFS_BUF_UNASYNC(sbp);
ASSERT(XFS_BUF_TARGET(sbp) == mp->m_ddev_targp);
xfsbdstrat(mp, sbp);
/* Nevermind errors we might get here. */
error = xfs_iowait(sbp);
if (error)
xfs_ioerror_alert("xfs_unmountfs_writesb",

12
fs/xfs/xfs_trans_buf.c
View File

@ -354,17 +354,15 @@ xfs_trans_read_buf(
ASSERT(!XFS_BUF_ISASYNC(bp));
XFS_BUF_READ(bp);
xfsbdstrat(tp->t_mountp, bp);
xfs_iowait(bp);
if (XFS_BUF_GETERROR(bp) != 0) {
error = xfs_iowait(bp);
if (error) {
xfs_ioerror_alert("xfs_trans_read_buf", mp,
bp, blkno);
error = XFS_BUF_GETERROR(bp);
xfs_buf_relse(bp);
/*
* We can gracefully recover from most
* read errors. Ones we can't are those
* that happen after the transaction's
* already dirty.
* We can gracefully recover from most read
* errors. Ones we can't are those that happen
* after the transaction's already dirty.
*/
if (tp->t_flags & XFS_TRANS_DIRTY)
xfs_force_shutdown(tp->t_mountp,

6
fs/xfs/xfs_vnodeops.c
View File

@ -3825,7 +3825,8 @@ xfs_zero_remaining_bytes(
XFS_BUF_READ(bp);
XFS_BUF_SET_ADDR(bp, XFS_FSB_TO_DB(ip, imap.br_startblock));
xfsbdstrat(mp, bp);
if ((error = xfs_iowait(bp))) {
error = xfs_iowait(bp);
if (error) {
xfs_ioerror_alert("xfs_zero_remaining_bytes(read)",
mp, bp, XFS_BUF_ADDR(bp));
break;
@ -3837,7 +3838,8 @@ xfs_zero_remaining_bytes(
XFS_BUF_UNREAD(bp);
XFS_BUF_WRITE(bp);
xfsbdstrat(mp, bp);
if ((error = xfs_iowait(bp))) {
error = xfs_iowait(bp);
if (error) {
xfs_ioerror_alert("xfs_zero_remaining_bytes(write)",
mp, bp, XFS_BUF_ADDR(bp));
break;