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From: "Darrick J. Wong" <darrick.wong@oracle.com>
To: darrick.wong@oracle.com
Cc: linux-xfs@vger.kernel.org, hch@infradead.org,
	david@fromorbit.com, Christoph Hellwig <hch@lst.de>
Subject: [PATCH 01/13] xfs: make xfs_buf_alloc return an error code
Date: Mon, 20 Jan 2020 14:56:35 -0800	[thread overview]
Message-ID: <157956099569.1166689.10013865738301648123.stgit@magnolia> (raw)
In-Reply-To: <157956098906.1166689.13651975861399490259.stgit@magnolia>

From: Darrick J. Wong <darrick.wong@oracle.com>

Convert _xfs_buf_alloc() to return numeric error codes like most
everywhere else in xfs.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
 fs/xfs/xfs_buf.c |   21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)


diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index a0229c368e78..f9a6cf71f4ab 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -198,20 +198,22 @@ xfs_buf_free_maps(
 	}
 }
 
-static struct xfs_buf *
+static int
 _xfs_buf_alloc(
 	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)
 {
 	struct xfs_buf		*bp;
 	int			error;
 	int			i;
 
+	*bpp = NULL;
 	bp = kmem_zone_zalloc(xfs_buf_zone, KM_NOFS);
 	if (unlikely(!bp))
-		return NULL;
+		return -ENOMEM;
 
 	/*
 	 * We don't want certain flags to appear in b_flags unless they are
@@ -239,7 +241,7 @@ _xfs_buf_alloc(
 	error = xfs_buf_get_maps(bp, nmaps);
 	if (error)  {
 		kmem_cache_free(xfs_buf_zone, bp);
-		return NULL;
+		return error;
 	}
 
 	bp->b_bn = map[0].bm_bn;
@@ -256,7 +258,8 @@ _xfs_buf_alloc(
 	XFS_STATS_INC(bp->b_mount, xb_create);
 	trace_xfs_buf_init(bp, _RET_IP_);
 
-	return bp;
+	*bpp = bp;
+	return 0;
 }
 
 /*
@@ -715,8 +718,8 @@ xfs_buf_get_map(
 		return NULL;
 	}
 
-	new_bp = _xfs_buf_alloc(target, map, nmaps, flags);
-	if (unlikely(!new_bp))
+	error = _xfs_buf_alloc(target, map, nmaps, flags, &new_bp);
+	if (error)
 		return NULL;
 
 	error = xfs_buf_allocate_memory(new_bp, flags);
@@ -917,8 +920,8 @@ xfs_buf_get_uncached(
 	DEFINE_SINGLE_BUF_MAP(map, XFS_BUF_DADDR_NULL, numblks);
 
 	/* flags might contain irrelevant bits, pass only what we care about */
-	bp = _xfs_buf_alloc(target, &map, 1, flags & XBF_NO_IOACCT);
-	if (unlikely(bp == NULL))
+	error = _xfs_buf_alloc(target, &map, 1, flags & XBF_NO_IOACCT, &bp);
+	if (error)
 		goto fail;
 
 	page_count = PAGE_ALIGN(numblks << BBSHIFT) >> PAGE_SHIFT;


  reply	other threads:[~2020-01-20 22:56 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-20 22:56 [PATCH v3 00/13] xfs: make buffer functions return error codes Darrick J. Wong
2020-01-20 22:56 ` Darrick J. Wong [this message]
2020-01-20 22:56 ` [PATCH 02/13] xfs: make xfs_buf_read return an error code Darrick J. Wong
2020-01-20 22:56 ` [PATCH 03/13] xfs: make xfs_buf_get " Darrick J. Wong
2020-01-20 22:56 ` [PATCH 04/13] xfs: make xfs_buf_get_uncached " Darrick J. Wong
2020-01-20 22:57 ` [PATCH 05/13] xfs: make xfs_buf_read_map " Darrick J. Wong
2020-01-21 22:52   ` Christoph Hellwig
2020-01-22  0:20     ` Darrick J. Wong
2020-01-22 22:12       ` Christoph Hellwig
2020-01-23  7:40         ` Darrick J. Wong
2020-01-20 22:57 ` [PATCH 06/13] xfs: make xfs_buf_get_map " Darrick J. Wong
2020-01-20 22:57 ` [PATCH 07/13] xfs: make xfs_trans_get_buf_map " Darrick J. Wong
2020-01-20 22:57 ` [PATCH 08/13] xfs: make xfs_trans_get_buf " Darrick J. Wong
2020-01-20 22:57 ` [PATCH 09/13] xfs: remove the xfs_btree_get_buf[ls] functions Darrick J. Wong
2020-01-20 22:57 ` [PATCH 10/13] xfs: make xfs_*read_agf return EAGAIN to ALLOC_FLAG_TRYLOCK callers Darrick J. Wong
2020-01-20 22:57 ` [PATCH 11/13] xfs: remove unnecessary null pointer checks from _read_agf callers Darrick J. Wong
2020-01-20 22:57 ` [PATCH 12/13] xfs: move buffer read io error logging to xfs_buf_read_map Darrick J. Wong
2020-01-20 22:57 ` [PATCH 13/13] xfs: fix xfs_buf_ioerror_alert location reporting Darrick J. Wong

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