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Commit b911ca04 authored by David Chinner's avatar David Chinner Committed by Lachlan McIlroy
Browse files

[XFS] Sanitise xfs_log_force error checking. 



xfs_log_force() is declared to return an error, but we almost never check
it. We don't need to check it in most cases; if there's a log I/O error
then we'll be shutting down the filesystem anyway and that means we'll
catch the error somewhere else.

However, on certain calls we should be returning an error - sync
transactions, fsync, sync writes, etc. so this isn't a pure black and
white distinction. Hence make xfs_log_force() a void function that issues
a warning to the syslog on error, and call _xfs_log_force() in all the
places where we actually care about the error status returned.

SGI-PV: 980084
SGI-Modid: xfs-linux-melb:xfs-kern:30832a

Signed-off-by: default avatarDavid Chinner <dgc@sgi.com>
Signed-off-by: default avatarNiv Sardi <xaiki@sgi.com>
Signed-off-by: default avatarLachlan McIlroy <lachlan@sgi.com>
parent 234f56ac

fs/xfs/xfs_log.c

+23 −2
Original line number Diff line number Diff line
@@ -382,7 +382,27 @@ _xfs_log_force( 
		return xlog_state_sync_all(log, flags, log_flushed);

	else

		return xlog_state_sync(log, lsn, flags, log_flushed);

}	/* xfs_log_force */

}	/* _xfs_log_force */



/*

 * Wrapper for _xfs_log_force(), to be used when caller doesn't care

 * about errors or whether the log was flushed or not. This is the normal

 * interface to use when trying to unpin items or move the log forward.

 */

void

xfs_log_force(

	xfs_mount_t	*mp,

	xfs_lsn_t	lsn,

	uint		flags)

{

	int	error;

	error = _xfs_log_force(mp, lsn, flags, NULL);

	if (error) {

		xfs_fs_cmn_err(CE_WARN, mp, "xfs_log_force: "

			"error %d returned.", error);

	}

}





/*

 * Attaches a new iclog I/O completion callback routine during
@@ -634,7 +654,8 @@ xfs_log_unmount_write(xfs_mount_t *mp) 
	if (mp->m_flags & XFS_MOUNT_RDONLY)

		return 0;



	xfs_log_force(mp, 0, XFS_LOG_FORCE|XFS_LOG_SYNC);

	error = _xfs_log_force(mp, 0, XFS_LOG_FORCE|XFS_LOG_SYNC, NULL);

	ASSERT(error || !(XLOG_FORCED_SHUTDOWN(log)));



#ifdef DEBUG

	first_iclog = iclog = log->l_iclog;

fs/xfs/xfs_log.h

+3 −2
Original line number Diff line number Diff line
@@ -142,8 +142,9 @@ int _xfs_log_force(struct xfs_mount *mp, 
			 xfs_lsn_t	lsn,

			 uint		flags,

			 int		*log_forced);

#define xfs_log_force(mp, lsn, flags) \

	_xfs_log_force(mp, lsn, flags, NULL);

void	  xfs_log_force(struct xfs_mount	*mp,

			xfs_lsn_t		lsn,

			uint			flags);

int	  xfs_log_mount(struct xfs_mount	*mp,

			struct xfs_buftarg	*log_target,

			xfs_daddr_t		start_block,

fs/xfs/xfs_rw.c

+4 −4
Original line number Diff line number Diff line
@@ -126,11 +126,11 @@ xfs_write_sync_logforce( 
		 * when we return.

		 */

		if (iip && iip->ili_last_lsn) {

			xfs_log_force(mp, iip->ili_last_lsn,

					XFS_LOG_FORCE | XFS_LOG_SYNC);

			error = _xfs_log_force(mp, iip->ili_last_lsn,

					XFS_LOG_FORCE | XFS_LOG_SYNC, NULL);

		} else if (xfs_ipincount(ip) > 0) {

			xfs_log_force(mp, (xfs_lsn_t)0,

					XFS_LOG_FORCE | XFS_LOG_SYNC);

			error = _xfs_log_force(mp, (xfs_lsn_t)0,

					XFS_LOG_FORCE | XFS_LOG_SYNC, NULL);

		}



	} else {