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xfs: remove xfsbdstrat error

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The xfsbdstrat helper is a small but useless wrapper for xfs_buf_iorequest that
handles the case of a shut down filesystem.  Most of the users have private,
uncached buffers that can just be freed in this case, but the complex error
handling in xfs_bioerror_relse messes up the case when it's called without
a locked buffer.

Remove xfsbdstrat and opencode the error handling in the callers.  All but
one can simply return an error and don't need to deal with buffer state,
and the one caller that cares about the buffer state could do with a major
cleanup as well, but we'll defer that to later.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
This commit is contained in:
Christoph Hellwig 2013-12-17 00:03:52 -08:00 committed by Ben Myers
parent 6e708bcf65
commit 83a0adc3f9
5 changed files with 43 additions and 29 deletions
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14
fs/xfs/xfs_bmap_util.c
View File

@ -1187,7 +1187,12 @@ xfs_zero_remaining_bytes(
XFS_BUF_UNWRITE(bp);
XFS_BUF_READ(bp);
XFS_BUF_SET_ADDR(bp, xfs_fsb_to_db(ip, imap.br_startblock));
xfsbdstrat(mp, bp);
if (XFS_FORCED_SHUTDOWN(mp)) {
error = XFS_ERROR(EIO);
break;
}
xfs_buf_iorequest(bp);
error = xfs_buf_iowait(bp);
if (error) {
xfs_buf_ioerror_alert(bp,
@ -1200,7 +1205,12 @@ xfs_zero_remaining_bytes(
XFS_BUF_UNDONE(bp);
XFS_BUF_UNREAD(bp);
XFS_BUF_WRITE(bp);
xfsbdstrat(mp, bp);
if (XFS_FORCED_SHUTDOWN(mp)) {
error = XFS_ERROR(EIO);
break;
}
xfs_buf_iorequest(bp);
error = xfs_buf_iowait(bp);
if (error) {
xfs_buf_ioerror_alert(bp,

27
fs/xfs/xfs_buf.c
View File

@ -698,7 +698,11 @@ xfs_buf_read_uncached(
bp->b_flags |= XBF_READ;
bp->b_ops = ops;
xfsbdstrat(target->bt_mount, bp);
if (XFS_FORCED_SHUTDOWN(target->bt_mount)) {
xfs_buf_relse(bp);
return NULL;
}
xfs_buf_iorequest(bp);
xfs_buf_iowait(bp);
return bp;
}
@ -1089,7 +1093,7 @@ xfs_bioerror(
* This is meant for userdata errors; metadata bufs come with
* iodone functions attached, so that we can track down errors.
*/
STATIC int
int
xfs_bioerror_relse(
struct xfs_buf *bp)
{
@ -1164,25 +1168,6 @@ xfs_bwrite(
return error;
}
/*
* 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.
*/
void
xfsbdstrat(
struct xfs_mount *mp,
struct xfs_buf *bp)
{
if (XFS_FORCED_SHUTDOWN(mp)) {
trace_xfs_bdstrat_shut(bp, _RET_IP_);
xfs_bioerror_relse(bp);
return;
}
xfs_buf_iorequest(bp);
}
STATIC void
_xfs_buf_ioend(
xfs_buf_t *bp,

5
fs/xfs/xfs_buf.h
View File

@ -269,9 +269,6 @@ extern void xfs_buf_unlock(xfs_buf_t *);
/* Buffer Read and Write Routines */
extern int xfs_bwrite(struct xfs_buf *bp);
extern void xfsbdstrat(struct xfs_mount *, struct xfs_buf *);
extern void xfs_buf_ioend(xfs_buf_t *, int);
extern void xfs_buf_ioerror(xfs_buf_t *, int);
extern void xfs_buf_ioerror_alert(struct xfs_buf *, const char *func);
@ -282,6 +279,8 @@ extern void xfs_buf_iomove(xfs_buf_t *, size_t, size_t, void *,
#define xfs_buf_zero(bp, off, len) \
xfs_buf_iomove((bp), (off), (len), NULL, XBRW_ZERO)
extern int xfs_bioerror_relse(struct xfs_buf *);
static inline int xfs_buf_geterror(xfs_buf_t *bp)
{
return bp ? bp->b_error : ENOMEM;

13
fs/xfs/xfs_log_recover.c
View File

@ -193,7 +193,10 @@ xlog_bread_noalign(
bp->b_io_length = nbblks;
bp->b_error = 0;
xfsbdstrat(log->l_mp, bp);
if (XFS_FORCED_SHUTDOWN(log->l_mp))
return XFS_ERROR(EIO);
xfs_buf_iorequest(bp);
error = xfs_buf_iowait(bp);
if (error)
xfs_buf_ioerror_alert(bp, __func__);
@ -4397,7 +4400,13 @@ xlog_do_recover(
XFS_BUF_READ(bp);
XFS_BUF_UNASYNC(bp);
bp->b_ops = &xfs_sb_buf_ops;
xfsbdstrat(log->l_mp, bp);
if (XFS_FORCED_SHUTDOWN(log->l_mp)) {
xfs_buf_relse(bp);
return XFS_ERROR(EIO);
}
xfs_buf_iorequest(bp);
error = xfs_buf_iowait(bp);
if (error) {
xfs_buf_ioerror_alert(bp, __func__);

13
fs/xfs/xfs_trans_buf.c
View File

@ -314,7 +314,18 @@ xfs_trans_read_buf_map(
ASSERT(bp->b_iodone == NULL);
XFS_BUF_READ(bp);
bp->b_ops = ops;
xfsbdstrat(tp->t_mountp, bp);
/*
* XXX(hch): clean up the error handling here to be less
* of a mess..
*/
if (XFS_FORCED_SHUTDOWN(mp)) {
trace_xfs_bdstrat_shut(bp, _RET_IP_);
xfs_bioerror_relse(bp);
} else {
xfs_buf_iorequest(bp);
}
error = xfs_buf_iowait(bp);
if (error) {
xfs_buf_ioerror_alert(bp, __func__);