Merge tag 'xfs-5.18-fixes-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull xfs fixes from Dave Chinner:

 - define buffer bit flags as unsigned to fix gcc-5 + c11 warnings

 - remove redundant XFS fields from MAINTAINERS

 - fix inode buffer locking order regression

* tag 'xfs-5.18-fixes-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: reorder iunlink remove operation in xfs_ifree
  MAINTAINERS: update IOMAP FILESYSTEM LIBRARY and XFS FILESYSTEM
  xfs: convert buffer flags to unsigned.

5 files changed, 38 insertions, 39 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index 5e8c2f611766..90aca947e18a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -10237,8 +10237,6 @@ F:	drivers/net/ethernet/sgi/ioc3-eth.c
 IOMAP FILESYSTEM LIBRARY
 M:	Christoph Hellwig <hch@infradead.org>
 M:	Darrick J. Wong <djwong@kernel.org>
-M:	linux-xfs@vger.kernel.org
-M:	linux-fsdevel@vger.kernel.org
 L:	linux-xfs@vger.kernel.org
 L:	linux-fsdevel@vger.kernel.org
 S:	Supported
@@ -21596,7 +21594,6 @@ F:	drivers/xen/*swiotlb*
 XFS FILESYSTEM
 C:	irc://irc.oftc.net/xfs
 M:	Darrick J. Wong <djwong@kernel.org>
-M:	linux-xfs@vger.kernel.org
 L:	linux-xfs@vger.kernel.org
 S:	Supported
 W:	http://xfs.org/
diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index e1afb9e503e1..bf4e60871068 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -406,7 +406,7 @@ xfs_buf_alloc_pages(
 STATIC int
 _xfs_buf_map_pages(
 	struct xfs_buf		*bp,
-	uint			flags)
+	xfs_buf_flags_t		flags)
 {
 	ASSERT(bp->b_flags & _XBF_PAGES);
 	if (bp->b_page_count == 1) {
@@ -868,7 +868,7 @@ xfs_buf_read_uncached(
 	struct xfs_buftarg	*target,
 	xfs_daddr_t		daddr,
 	size_t			numblks,
-	int			flags,
+	xfs_buf_flags_t		flags,
 	struct xfs_buf		**bpp,
 	const struct xfs_buf_ops *ops)
 {
@@ -903,7 +903,7 @@ int
 xfs_buf_get_uncached(
 	struct xfs_buftarg	*target,
 	size_t			numblks,
-	int			flags,
+	xfs_buf_flags_t		flags,
 	struct xfs_buf		**bpp)
 {
 	int			error;
diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h
index edcb6254fa6a..1ee3056ff9cf 100644
--- a/fs/xfs/xfs_buf.h
+++ b/fs/xfs/xfs_buf.h
@@ -22,28 +22,28 @@ struct xfs_buf;
 
 #define XFS_BUF_DADDR_NULL	((xfs_daddr_t) (-1LL))
 
-#define XBF_READ	 (1 << 0) /* buffer intended for reading from device */
-#define XBF_WRITE	 (1 << 1) /* buffer intended for writing to device */
-#define XBF_READ_AHEAD	 (1 << 2) /* asynchronous read-ahead */
-#define XBF_NO_IOACCT	 (1 << 3) /* bypass I/O accounting (non-LRU bufs) */
-#define XBF_ASYNC	 (1 << 4) /* initiator will not wait for completion */
-#define XBF_DONE	 (1 << 5) /* all pages in the buffer uptodate */
-#define XBF_STALE	 (1 << 6) /* buffer has been staled, do not find it */
-#define XBF_WRITE_FAIL	 (1 << 7) /* async writes have failed on this buffer */
+#define XBF_READ	 (1u << 0) /* buffer intended for reading from device */
+#define XBF_WRITE	 (1u << 1) /* buffer intended for writing to device */
+#define XBF_READ_AHEAD	 (1u << 2) /* asynchronous read-ahead */
+#define XBF_NO_IOACCT	 (1u << 3) /* bypass I/O accounting (non-LRU bufs) */
+#define XBF_ASYNC	 (1u << 4) /* initiator will not wait for completion */
+#define XBF_DONE	 (1u << 5) /* all pages in the buffer uptodate */
+#define XBF_STALE	 (1u << 6) /* buffer has been staled, do not find it */
+#define XBF_WRITE_FAIL	 (1u << 7) /* async writes have failed on this buffer */
 
 /* buffer type flags for write callbacks */
-#define _XBF_INODES	 (1 << 16)/* inode buffer */
-#define _XBF_DQUOTS	 (1 << 17)/* dquot buffer */
-#define _XBF_LOGRECOVERY	 (1 << 18)/* log recovery buffer */
+#define _XBF_INODES	 (1u << 16)/* inode buffer */
+#define _XBF_DQUOTS	 (1u << 17)/* dquot buffer */
+#define _XBF_LOGRECOVERY (1u << 18)/* log recovery buffer */
 
 /* flags used only internally */
-#define _XBF_PAGES	 (1 << 20)/* backed by refcounted pages */
-#define _XBF_KMEM	 (1 << 21)/* backed by heap memory */
-#define _XBF_DELWRI_Q	 (1 << 22)/* buffer on a delwri queue */
+#define _XBF_PAGES	 (1u << 20)/* backed by refcounted pages */
+#define _XBF_KMEM	 (1u << 21)/* backed by heap memory */
+#define _XBF_DELWRI_Q	 (1u << 22)/* buffer on a delwri queue */
 
 /* flags used only as arguments to access routines */
-#define XBF_TRYLOCK	 (1 << 30)/* lock requested, but do not wait */
-#define XBF_UNMAPPED	 (1 << 31)/* do not map the buffer */
+#define XBF_TRYLOCK	 (1u << 30)/* lock requested, but do not wait */
+#define XBF_UNMAPPED	 (1u << 31)/* do not map the buffer */
 
 typedef unsigned int xfs_buf_flags_t;
 
@@ -58,7 +58,7 @@ typedef unsigned int xfs_buf_flags_t;
 	{ XBF_WRITE_FAIL,	"WRITE_FAIL" }, \
 	{ _XBF_INODES,		"INODES" }, \
 	{ _XBF_DQUOTS,		"DQUOTS" }, \
-	{ _XBF_LOGRECOVERY,		"LOG_RECOVERY" }, \
+	{ _XBF_LOGRECOVERY,	"LOG_RECOVERY" }, \
 	{ _XBF_PAGES,		"PAGES" }, \
 	{ _XBF_KMEM,		"KMEM" }, \
 	{ _XBF_DELWRI_Q,	"DELWRI_Q" }, \
@@ -247,11 +247,11 @@ xfs_buf_readahead(
 	return xfs_buf_readahead_map(target, &map, 1, ops);
 }
 
-int xfs_buf_get_uncached(struct xfs_buftarg *target, size_t numblks, int flags,
-		struct xfs_buf **bpp);
+int xfs_buf_get_uncached(struct xfs_buftarg *target, size_t numblks,
+		xfs_buf_flags_t flags, struct xfs_buf **bpp);
 int xfs_buf_read_uncached(struct xfs_buftarg *target, xfs_daddr_t daddr,
-			  size_t numblks, int flags, struct xfs_buf **bpp,
-			  const struct xfs_buf_ops *ops);
+		size_t numblks, xfs_buf_flags_t flags, struct xfs_buf **bpp,
+		const struct xfs_buf_ops *ops);
 int _xfs_buf_read(struct xfs_buf *bp, xfs_buf_flags_t flags);
 void xfs_buf_hold(struct xfs_buf *bp);
 
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 9de6205fe134..39ae53efb3ab 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -2594,14 +2594,13 @@ xfs_ifree_cluster(
 }
 
 /*
- * This is called to return an inode to the inode free list.
- * The inode should already be truncated to 0 length and have
- * no pages associated with it.  This routine also assumes that
- * the inode is already a part of the transaction.
+ * This is called to return an inode to the inode free list.  The inode should
+ * already be truncated to 0 length and have no pages associated with it.  This
+ * routine also assumes that the inode is already a part of the transaction.
  *
- * The on-disk copy of the inode will have been added to the list
- * of unlinked inodes in the AGI. We need to remove the inode from
- * that list atomically with respect to freeing it here.
+ * The on-disk copy of the inode will have been added to the list of unlinked
+ * inodes in the AGI. We need to remove the inode from that list atomically with
+ * respect to freeing it here.
  */
 int
 xfs_ifree(
@@ -2623,13 +2622,16 @@ xfs_ifree(
 	pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino));
 
 	/*
-	 * Pull the on-disk inode from the AGI unlinked list.
+	 * Free the inode first so that we guarantee that the AGI lock is going
+	 * to be taken before we remove the inode from the unlinked list. This
+	 * makes the AGI lock -> unlinked list modification order the same as
+	 * used in O_TMPFILE creation.
 	 */
-	error = xfs_iunlink_remove(tp, pag, ip);
+	error = xfs_difree(tp, pag, ip->i_ino, &xic);
 	if (error)
-		goto out;
+		return error;
 
-	error = xfs_difree(tp, pag, ip->i_ino, &xic);
+	error = xfs_iunlink_remove(tp, pag, ip);
 	if (error)
 		goto out;
 
diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h
index de177842b951..0c82673238f4 100644
--- a/fs/xfs/xfs_trans.h
+++ b/fs/xfs/xfs_trans.h
@@ -175,7 +175,7 @@ xfs_trans_get_buf(
 	struct xfs_buftarg	*target,
 	xfs_daddr_t		blkno,
 	int			numblks,
-	uint			flags,
+	xfs_buf_flags_t		flags,
 	struct xfs_buf		**bpp)
 {
 	DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);