From d64e31a2f53cdcb2f95b782196faacb0995ca0c0 Mon Sep 17 00:00:00 2001 From: David Chinner Date: Thu, 10 Apr 2008 12:22:17 +1000 Subject: [PATCH] [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 Signed-off-by: Niv Sardi Signed-off-by: Lachlan McIlroy --- fs/xfs/linux-2.6/xfs_lrw.c | 19 ++++++------------- fs/xfs/linux-2.6/xfs_lrw.h | 3 ++- fs/xfs/xfs_log_recover.c | 6 ++++-- fs/xfs/xfs_mount.c | 1 - fs/xfs/xfs_trans_buf.c | 12 +++++------- fs/xfs/xfs_vnodeops.c | 6 ++++-- 6 files changed, 21 insertions(+), 26 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c index 1d95dca..f6dab5d 100644 --- a/fs/xfs/linux-2.6/xfs_lrw.c +++ b/fs/xfs/linux-2.6/xfs_lrw.c @@ -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); } /* diff --git a/fs/xfs/linux-2.6/xfs_lrw.h b/fs/xfs/linux-2.6/xfs_lrw.h index e200253..e1d498b 100644 --- a/fs/xfs/linux-2.6/xfs_lrw.h +++ b/fs/xfs/linux-2.6/xfs_lrw.h @@ -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 *); diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index 3a8fe7b..1f83298 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -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); diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index 2d03fe1..2fec452 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -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", diff --git a/fs/xfs/xfs_trans_buf.c b/fs/xfs/xfs_trans_buf.c index 4e5c010..cb0c583 100644 --- a/fs/xfs/xfs_trans_buf.c +++ b/fs/xfs/xfs_trans_buf.c @@ -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, diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c index ca38fb9..dd4621e 100644 --- a/fs/xfs/xfs_vnodeops.c +++ b/fs/xfs/xfs_vnodeops.c @@ -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; -- 2.7.4