X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=blobdiff_plain;f=fs%2Fxfs%2Fxfs_trans_buf.c;h=08174ffa2118935a4c00493c8e8d77aefdd215d9;hb=cb85f4d23f794e24127f3e562cb3b54b0803f456;hp=b5b3a78ef31c41e0f057d8f8ab752a21ec8e910e;hpb=2e9550ed67cc861e6607d63e7d1036dce28f4902;p=linux.git

diff --git a/fs/xfs/xfs_trans_buf.c b/fs/xfs/xfs_trans_buf.c
index b5b3a78ef31c..08174ffa2118 100644
--- a/fs/xfs/xfs_trans_buf.c
+++ b/fs/xfs/xfs_trans_buf.c
@@ -112,19 +112,22 @@ xfs_trans_bjoin(
  * If the transaction pointer is NULL, make this just a normal
  * get_buf() call.
  */
-struct xfs_buf *
+int
 xfs_trans_get_buf_map(
 	struct xfs_trans	*tp,
 	struct xfs_buftarg	*target,
 	struct xfs_buf_map	*map,
 	int			nmaps,
-	xfs_buf_flags_t		flags)
+	xfs_buf_flags_t		flags,
+	struct xfs_buf		**bpp)
 {
 	xfs_buf_t		*bp;
 	struct xfs_buf_log_item	*bip;
+	int			error;
 
+	*bpp = NULL;
 	if (!tp)
-		return xfs_buf_get_map(target, map, nmaps, flags);
+		return xfs_buf_get_map(target, map, nmaps, flags, bpp);
 
 	/*
 	 * If we find the buffer in the cache with this transaction
@@ -146,19 +149,20 @@ xfs_trans_get_buf_map(
 		ASSERT(atomic_read(&bip->bli_refcount) > 0);
 		bip->bli_recur++;
 		trace_xfs_trans_get_buf_recur(bip);
-		return bp;
+		*bpp = bp;
+		return 0;
 	}
 
-	bp = xfs_buf_get_map(target, map, nmaps, flags);
-	if (bp == NULL) {
-		return NULL;
-	}
+	error = xfs_buf_get_map(target, map, nmaps, flags, &bp);
+	if (error)
+		return error;
 
 	ASSERT(!bp->b_error);
 
 	_xfs_trans_bjoin(tp, bp, 1);
 	trace_xfs_trans_get_buf(bp->b_log_item);
-	return bp;
+	*bpp = bp;
+	return 0;
 }
 
 /*
@@ -276,7 +280,7 @@ xfs_trans_read_buf_map(
 		ASSERT(bp->b_ops != NULL);
 		error = xfs_buf_reverify(bp, ops);
 		if (error) {
-			xfs_buf_ioerror_alert(bp, __func__);
+			xfs_buf_ioerror_alert(bp, __return_address);
 
 			if (tp->t_flags & XFS_TRANS_DIRTY)
 				xfs_force_shutdown(tp->t_mountp,
@@ -298,36 +302,17 @@ xfs_trans_read_buf_map(
 		return 0;
 	}
 
-	bp = xfs_buf_read_map(target, map, nmaps, flags, ops);
-	if (!bp) {
-		if (!(flags & XBF_TRYLOCK))
-			return -ENOMEM;
-		return tp ? 0 : -EAGAIN;
-	}
-
-	/*
-	 * If we've had a read error, then the contents of the buffer are
-	 * invalid and should not be used. To ensure that a followup read tries
-	 * to pull the buffer from disk again, we clear the XBF_DONE flag and
-	 * mark the buffer stale. This ensures that anyone who has a current
-	 * reference to the buffer will interpret it's contents correctly and
-	 * future cache lookups will also treat it as an empty, uninitialised
-	 * buffer.
-	 */
-	if (bp->b_error) {
-		error = bp->b_error;
-		if (!XFS_FORCED_SHUTDOWN(mp))
-			xfs_buf_ioerror_alert(bp, __func__);
-		bp->b_flags &= ~XBF_DONE;
-		xfs_buf_stale(bp);
-
+	error = xfs_buf_read_map(target, map, nmaps, flags, &bp, ops,
+			__return_address);
+	switch (error) {
+	case 0:
+		break;
+	default:
 		if (tp && (tp->t_flags & XFS_TRANS_DIRTY))
 			xfs_force_shutdown(tp->t_mountp, SHUTDOWN_META_IO_ERROR);
-		xfs_buf_relse(bp);
-
-		/* bad CRC means corrupted metadata */
-		if (error == -EFSBADCRC)
-			error = -EFSCORRUPTED;
+		/* fall through */
+	case -ENOMEM:
+	case -EAGAIN:
 		return error;
 	}