From ecb3403de1efb56f78d9093376aec0a8af76b316 Mon Sep 17 00:00:00 2001
From: Akinobu Mita <akinobu.mita@gmail.com>
Date: Mon, 4 Mar 2013 21:58:20 +0900
Subject: xfs: rename random32() to prandom_u32()

Use more preferable function name which implies using a pseudo-random
number generator.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: <bpm@sgi.com>
Cc: Ben Myers <bpm@sgi.com>
Cc: Alex Elder <elder@kernel.org>
Cc: xfs@oss.sgi.com
Signed-off-by: Ben Myers <bpm@sgi.com>
---
 fs/xfs/xfs_alloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'fs/xfs/xfs_alloc.c')

diff --git a/fs/xfs/xfs_alloc.c b/fs/xfs/xfs_alloc.c
index 0ad23253e8b..a8beb5c7dd6 100644
--- a/fs/xfs/xfs_alloc.c
+++ b/fs/xfs/xfs_alloc.c
@@ -842,7 +842,7 @@ xfs_alloc_ag_vextent_near(
 	 */
 	int		dofirst;	/* set to do first algorithm */
 
-	dofirst = random32() & 1;
+	dofirst = prandom_u32() & 1;
 #endif
 
 restart:
-- 
cgit v1.2.3-70-g09d2


From 4e0e6040c4052aff15a494ac05778f4086d24c33 Mon Sep 17 00:00:00 2001
From: Dave Chinner <dchinner@redhat.com>
Date: Wed, 3 Apr 2013 16:11:13 +1100
Subject: xfs: add CRC checks to the AGF

The AGF already has some self identifying fields (e.g. the sequence
number) so we only need to add the uuid to it to identify the
filesystem it belongs to. The location is fixed based on the
sequence number, so there's no need to add a block number, either.

Hence the only additional fields are the CRC and LSN fields. These
are unlogged, so place some space between the end of the logged
fields and them so that future expansion of the AGF for logged
fields can be placed adjacent to the existing logged fields and
hence not complicate the field-derived range based logging we
currently have.

Based originally on a patch from myself, modified further by
Christoph Hellwig and then modified again to fit into the
verifier structure with additional fields by myself. The multiple
signed-off-by tags indicate the age and history of this patch.

Signed-off-by: Dave Chinner <dgc@sgi.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
---
 fs/xfs/xfs_ag.h          | 23 ++++++++++++--
 fs/xfs/xfs_alloc.c       | 80 +++++++++++++++++++++++++++++++++---------------
 fs/xfs/xfs_buf_item.h    |  4 ++-
 fs/xfs/xfs_fsops.c       |  3 ++
 fs/xfs/xfs_log_recover.c |  8 +++++
 5 files changed, 91 insertions(+), 27 deletions(-)

(limited to 'fs/xfs/xfs_alloc.c')

diff --git a/fs/xfs/xfs_ag.h b/fs/xfs/xfs_ag.h
index f2aeedb6a57..9f4815e0c96 100644
--- a/fs/xfs/xfs_ag.h
+++ b/fs/xfs/xfs_ag.h
@@ -63,12 +63,29 @@ typedef struct xfs_agf {
 	__be32		agf_spare0;	/* spare field */
 	__be32		agf_levels[XFS_BTNUM_AGF];	/* btree levels */
 	__be32		agf_spare1;	/* spare field */
+
 	__be32		agf_flfirst;	/* first freelist block's index */
 	__be32		agf_fllast;	/* last freelist block's index */
 	__be32		agf_flcount;	/* count of blocks in freelist */
 	__be32		agf_freeblks;	/* total free blocks */
+
 	__be32		agf_longest;	/* longest free space */
 	__be32		agf_btreeblks;	/* # of blocks held in AGF btrees */
+	uuid_t		agf_uuid;	/* uuid of filesystem */
+
+	/*
+	 * reserve some contiguous space for future logged fields before we add
+	 * the unlogged fields. This makes the range logging via flags and
+	 * structure offsets much simpler.
+	 */
+	__be64		agf_spare64[16];
+
+	/* unlogged fields, written during buffer writeback. */
+	__be64		agf_lsn;	/* last write sequence */
+	__be32		agf_crc;	/* crc of agf sector */
+	__be32		agf_spare2;
+
+	/* structure must be padded to 64 bit alignment */
 } xfs_agf_t;
 
 #define	XFS_AGF_MAGICNUM	0x00000001
@@ -83,7 +100,8 @@ typedef struct xfs_agf {
 #define	XFS_AGF_FREEBLKS	0x00000200
 #define	XFS_AGF_LONGEST		0x00000400
 #define	XFS_AGF_BTREEBLKS	0x00000800
-#define	XFS_AGF_NUM_BITS	12
+#define	XFS_AGF_UUID		0x00001000
+#define	XFS_AGF_NUM_BITS	13
 #define	XFS_AGF_ALL_BITS	((1 << XFS_AGF_NUM_BITS) - 1)
 
 #define XFS_AGF_FLAGS \
@@ -98,7 +116,8 @@ typedef struct xfs_agf {
 	{ XFS_AGF_FLCOUNT,	"FLCOUNT" }, \
 	{ XFS_AGF_FREEBLKS,	"FREEBLKS" }, \
 	{ XFS_AGF_LONGEST,	"LONGEST" }, \
-	{ XFS_AGF_BTREEBLKS,	"BTREEBLKS" }
+	{ XFS_AGF_BTREEBLKS,	"BTREEBLKS" }, \
+	{ XFS_AGF_UUID,		"UUID" }
 
 /* disk block (xfs_daddr_t) in the AG */
 #define XFS_AGF_DADDR(mp)	((xfs_daddr_t)(1 << (mp)->m_sectbb_log))
diff --git a/fs/xfs/xfs_alloc.c b/fs/xfs/xfs_alloc.c
index a8beb5c7dd6..c34f799aa92 100644
--- a/fs/xfs/xfs_alloc.c
+++ b/fs/xfs/xfs_alloc.c
@@ -33,7 +33,9 @@
 #include "xfs_alloc.h"
 #include "xfs_extent_busy.h"
 #include "xfs_error.h"
+#include "xfs_cksum.h"
 #include "xfs_trace.h"
+#include "xfs_buf_item.h"
 
 struct workqueue_struct *xfs_alloc_wq;
 
@@ -2058,11 +2060,14 @@ xfs_alloc_log_agf(
 		offsetof(xfs_agf_t, agf_freeblks),
 		offsetof(xfs_agf_t, agf_longest),
 		offsetof(xfs_agf_t, agf_btreeblks),
+		offsetof(xfs_agf_t, agf_uuid),
 		sizeof(xfs_agf_t)
 	};
 
 	trace_xfs_agf(tp->t_mountp, XFS_BUF_TO_AGF(bp), fields, _RET_IP_);
 
+	xfs_trans_buf_set_type(tp, bp, XFS_BLF_AGF_BUF);
+
 	xfs_btree_offsets(fields, offsets, XFS_AGF_NUM_BITS, &first, &last);
 	xfs_trans_log_buf(tp, bp, (uint)first, (uint)last);
 }
@@ -2143,22 +2148,24 @@ xfs_alloc_put_freelist(
 	return 0;
 }
 
-static void
+static bool
 xfs_agf_verify(
+	struct xfs_mount *mp,
 	struct xfs_buf	*bp)
  {
-	struct xfs_mount *mp = bp->b_target->bt_mount;
-	struct xfs_agf	*agf;
-	int		agf_ok;
+	struct xfs_agf	*agf = XFS_BUF_TO_AGF(bp);
 
-	agf = XFS_BUF_TO_AGF(bp);
+	if (xfs_sb_version_hascrc(&mp->m_sb) &&
+	    !uuid_equal(&agf->agf_uuid, &mp->m_sb.sb_uuid))
+			return false;
 
-	agf_ok = agf->agf_magicnum == cpu_to_be32(XFS_AGF_MAGIC) &&
-		XFS_AGF_GOOD_VERSION(be32_to_cpu(agf->agf_versionnum)) &&
-		be32_to_cpu(agf->agf_freeblks) <= be32_to_cpu(agf->agf_length) &&
-		be32_to_cpu(agf->agf_flfirst) < XFS_AGFL_SIZE(mp) &&
-		be32_to_cpu(agf->agf_fllast) < XFS_AGFL_SIZE(mp) &&
-		be32_to_cpu(agf->agf_flcount) <= XFS_AGFL_SIZE(mp);
+	if (!(agf->agf_magicnum == cpu_to_be32(XFS_AGF_MAGIC) &&
+	      XFS_AGF_GOOD_VERSION(be32_to_cpu(agf->agf_versionnum)) &&
+	      be32_to_cpu(agf->agf_freeblks) <= be32_to_cpu(agf->agf_length) &&
+	      be32_to_cpu(agf->agf_flfirst) < XFS_AGFL_SIZE(mp) &&
+	      be32_to_cpu(agf->agf_fllast) < XFS_AGFL_SIZE(mp) &&
+	      be32_to_cpu(agf->agf_flcount) <= XFS_AGFL_SIZE(mp)))
+		return false;
 
 	/*
 	 * during growfs operations, the perag is not fully initialised,
@@ -2166,33 +2173,58 @@ xfs_agf_verify(
 	 * use it by using uncached buffers that don't have the perag attached
 	 * so we can detect and avoid this problem.
 	 */
-	if (bp->b_pag)
-		agf_ok = agf_ok && be32_to_cpu(agf->agf_seqno) ==
-						bp->b_pag->pag_agno;
+	if (bp->b_pag && be32_to_cpu(agf->agf_seqno) != bp->b_pag->pag_agno)
+		return false;
 
-	if (xfs_sb_version_haslazysbcount(&mp->m_sb))
-		agf_ok = agf_ok && be32_to_cpu(agf->agf_btreeblks) <=
-						be32_to_cpu(agf->agf_length);
+	if (xfs_sb_version_haslazysbcount(&mp->m_sb) &&
+	    be32_to_cpu(agf->agf_btreeblks) > be32_to_cpu(agf->agf_length))
+		return false;
+
+	return true;;
 
-	if (unlikely(XFS_TEST_ERROR(!agf_ok, mp, XFS_ERRTAG_ALLOC_READ_AGF,
-			XFS_RANDOM_ALLOC_READ_AGF))) {
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, agf);
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
-	}
 }
 
 static void
 xfs_agf_read_verify(
 	struct xfs_buf	*bp)
 {
-	xfs_agf_verify(bp);
+	struct xfs_mount *mp = bp->b_target->bt_mount;
+	int		agf_ok = 1;
+
+	if (xfs_sb_version_hascrc(&mp->m_sb))
+		agf_ok = xfs_verify_cksum(bp->b_addr, BBTOB(bp->b_length),
+					  offsetof(struct xfs_agf, agf_crc));
+
+	agf_ok = agf_ok && xfs_agf_verify(mp, bp);
+
+	if (unlikely(XFS_TEST_ERROR(!agf_ok, mp, XFS_ERRTAG_ALLOC_READ_AGF,
+			XFS_RANDOM_ALLOC_READ_AGF))) {
+		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
+		xfs_buf_ioerror(bp, EFSCORRUPTED);
+	}
 }
 
 static void
 xfs_agf_write_verify(
 	struct xfs_buf	*bp)
 {
-	xfs_agf_verify(bp);
+	struct xfs_mount *mp = bp->b_target->bt_mount;
+	struct xfs_buf_log_item	*bip = bp->b_fspriv;
+
+	if (!xfs_agf_verify(mp, bp)) {
+		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
+		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		return;
+	}
+
+	if (!xfs_sb_version_hascrc(&mp->m_sb))
+		return;
+
+	if (bip)
+		XFS_BUF_TO_AGF(bp)->agf_lsn = cpu_to_be64(bip->bli_item.li_lsn);
+
+	xfs_update_cksum(bp->b_addr, BBTOB(bp->b_length),
+			 offsetof(struct xfs_agf, agf_crc));
 }
 
 const struct xfs_buf_ops xfs_agf_buf_ops = {
diff --git a/fs/xfs/xfs_buf_item.h b/fs/xfs/xfs_buf_item.h
index 101ef8377f1..76bd7a167a7 100644
--- a/fs/xfs/xfs_buf_item.h
+++ b/fs/xfs/xfs_buf_item.h
@@ -45,12 +45,14 @@ extern kmem_zone_t	*xfs_buf_item_zone;
  * once the changes have been replayed into the buffer.
  */
 #define XFS_BLF_BTREE_BUF	(1<<5)
+#define XFS_BLF_AGF_BUF		(1<<6)
 
 #define XFS_BLF_TYPE_MASK	\
 		(XFS_BLF_UDQUOT_BUF | \
 		 XFS_BLF_PDQUOT_BUF | \
 		 XFS_BLF_GDQUOT_BUF | \
-		 XFS_BLF_BTREE_BUF)
+		 XFS_BLF_BTREE_BUF | \
+		 XFS_BLF_AGF_BUF)
 
 #define	XFS_BLF_CHUNK		128
 #define	XFS_BLF_SHIFT		7
diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c
index 6fe286a8e29..b6cca27e913 100644
--- a/fs/xfs/xfs_fsops.c
+++ b/fs/xfs/xfs_fsops.c
@@ -247,6 +247,9 @@ xfs_growfs_data_private(
 		tmpsize = agsize - XFS_PREALLOC_BLOCKS(mp);
 		agf->agf_freeblks = cpu_to_be32(tmpsize);
 		agf->agf_longest = cpu_to_be32(tmpsize);
+		if (xfs_sb_version_hascrc(&mp->m_sb))
+			uuid_copy(&agf->agf_uuid, &mp->m_sb.sb_uuid);
+
 		error = xfs_bwrite(bp);
 		xfs_buf_relse(bp);
 		if (error)
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index 3762ce2e99f..dadf24566d1 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -1953,6 +1953,14 @@ xlog_recover_do_reg_buffer(
 			break;
 		}
 		break;
+	case XFS_BLF_AGF_BUF:
+		if (*(__be32 *)bp->b_addr != cpu_to_be32(XFS_AGF_MAGIC)) {
+			xfs_warn(mp, "Bad AGF block magic!");
+			ASSERT(0);
+			break;
+		}
+		bp->b_ops = &xfs_agf_buf_ops;
+		break;
 	default:
 		break;
 	}
-- 
cgit v1.2.3-70-g09d2


From 77c95bba013089fa868217283eb6d98a05913e53 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Wed, 3 Apr 2013 16:11:14 +1100
Subject: xfs: add CRC checks to the AGFL

Add CRC checks, location information and a magic number to the AGFL.
Previously the AGFL was just a block containing nothing but the
free block pointers.  The new AGFL has a real header with the usual
boilerplate instead, so that we can verify it's not corrupted and
written into the right place.

[dchinner@redhat.com] Added LSN field, reworked significantly to fit
into new verifier structure and growfs structure, enabled full
verifier functionality now there is a header to verify and we can
guarantee an initialised AGFL.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
---
 fs/xfs/xfs_ag.h          |  25 +++++++++-
 fs/xfs/xfs_alloc.c       | 119 +++++++++++++++++++++++++++++++----------------
 fs/xfs/xfs_buf_item.h    |   4 +-
 fs/xfs/xfs_fsops.c       |   5 ++
 fs/xfs/xfs_log_recover.c |  10 ++++
 5 files changed, 119 insertions(+), 44 deletions(-)

(limited to 'fs/xfs/xfs_alloc.c')

diff --git a/fs/xfs/xfs_ag.h b/fs/xfs/xfs_ag.h
index 9f4815e0c96..272ef097e2b 100644
--- a/fs/xfs/xfs_ag.h
+++ b/fs/xfs/xfs_ag.h
@@ -30,6 +30,7 @@ struct xfs_trans;
 
 #define	XFS_AGF_MAGIC	0x58414746	/* 'XAGF' */
 #define	XFS_AGI_MAGIC	0x58414749	/* 'XAGI' */
+#define	XFS_AGFL_MAGIC	0x5841464c	/* 'XAFL' */
 #define	XFS_AGF_VERSION	1
 #define	XFS_AGI_VERSION	1
 
@@ -190,11 +191,31 @@ extern const struct xfs_buf_ops xfs_agi_buf_ops;
  */
 #define XFS_AGFL_DADDR(mp)	((xfs_daddr_t)(3 << (mp)->m_sectbb_log))
 #define	XFS_AGFL_BLOCK(mp)	XFS_HDR_BLOCK(mp, XFS_AGFL_DADDR(mp))
-#define XFS_AGFL_SIZE(mp)	((mp)->m_sb.sb_sectsize / sizeof(xfs_agblock_t))
 #define	XFS_BUF_TO_AGFL(bp)	((xfs_agfl_t *)((bp)->b_addr))
 
+#define XFS_BUF_TO_AGFL_BNO(mp, bp) \
+	(xfs_sb_version_hascrc(&((mp)->m_sb)) ? \
+		&(XFS_BUF_TO_AGFL(bp)->agfl_bno[0]) : \
+		(__be32 *)(bp)->b_addr)
+
+/*
+ * Size of the AGFL.  For CRC-enabled filesystes we steal a couple of
+ * slots in the beginning of the block for a proper header with the
+ * location information and CRC.
+ */
+#define XFS_AGFL_SIZE(mp) \
+	(((mp)->m_sb.sb_sectsize - \
+	 (xfs_sb_version_hascrc(&((mp)->m_sb)) ? \
+		sizeof(struct xfs_agfl) : 0)) / \
+	  sizeof(xfs_agblock_t))
+
 typedef struct xfs_agfl {
-	__be32		agfl_bno[1];	/* actually XFS_AGFL_SIZE(mp) */
+	__be32		agfl_magicnum;
+	__be32		agfl_seqno;
+	uuid_t		agfl_uuid;
+	__be64		agfl_lsn;
+	__be32		agfl_crc;
+	__be32		agfl_bno[];	/* actually XFS_AGFL_SIZE(mp) */
 } xfs_agfl_t;
 
 /*
diff --git a/fs/xfs/xfs_alloc.c b/fs/xfs/xfs_alloc.c
index c34f799aa92..40d3d576f47 100644
--- a/fs/xfs/xfs_alloc.c
+++ b/fs/xfs/xfs_alloc.c
@@ -432,53 +432,84 @@ xfs_alloc_fixup_trees(
 	return 0;
 }
 
-static void
+static bool
 xfs_agfl_verify(
 	struct xfs_buf	*bp)
 {
-#ifdef WHEN_CRCS_COME_ALONG
-	/*
-	 * we cannot actually do any verification of the AGFL because mkfs does
-	 * not initialise the AGFL to zero or NULL. Hence the only valid part of
-	 * the AGFL is what the AGF says is active. We can't get to the AGF, so
-	 * we can't verify just those entries are valid.
-	 *
-	 * This problem goes away when the CRC format change comes along as that
-	 * requires the AGFL to be initialised by mkfs. At that point, we can
-	 * verify the blocks in the agfl -active or not- lie within the bounds
-	 * of the AG. Until then, just leave this check ifdef'd out.
-	 */
 	struct xfs_mount *mp = bp->b_target->bt_mount;
 	struct xfs_agfl	*agfl = XFS_BUF_TO_AGFL(bp);
-	int		agfl_ok = 1;
-
 	int		i;
 
+	if (!uuid_equal(&agfl->agfl_uuid, &mp->m_sb.sb_uuid))
+		return false;
+	if (be32_to_cpu(agfl->agfl_magicnum) != XFS_AGFL_MAGIC)
+		return false;
+	/*
+	 * during growfs operations, the perag is not fully initialised,
+	 * so we can't use it for any useful checking. growfs ensures we can't
+	 * use it by using uncached buffers that don't have the perag attached
+	 * so we can detect and avoid this problem.
+	 */
+	if (bp->b_pag && be32_to_cpu(agfl->agfl_seqno) != bp->b_pag->pag_agno)
+		return false;
+
 	for (i = 0; i < XFS_AGFL_SIZE(mp); i++) {
-		if (be32_to_cpu(agfl->agfl_bno[i]) == NULLAGBLOCK ||
+		if (be32_to_cpu(agfl->agfl_bno[i]) != NULLAGBLOCK &&
 		    be32_to_cpu(agfl->agfl_bno[i]) >= mp->m_sb.sb_agblocks)
-			agfl_ok = 0;
+			return false;
 	}
+	return true;
+}
+
+static void
+xfs_agfl_read_verify(
+	struct xfs_buf	*bp)
+{
+	struct xfs_mount *mp = bp->b_target->bt_mount;
+	int		agfl_ok = 1;
+
+	/*
+	 * There is no verification of non-crc AGFLs because mkfs does not
+	 * initialise the AGFL to zero or NULL. Hence the only valid part of the
+	 * AGFL is what the AGF says is active. We can't get to the AGF, so we
+	 * can't verify just those entries are valid.
+	 */
+	if (!xfs_sb_version_hascrc(&mp->m_sb))
+		return;
+
+	agfl_ok = xfs_verify_cksum(bp->b_addr, BBTOB(bp->b_length),
+				   offsetof(struct xfs_agfl, agfl_crc));
+
+	agfl_ok = agfl_ok && xfs_agfl_verify(bp);
 
 	if (!agfl_ok) {
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, agfl);
+		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
 		xfs_buf_ioerror(bp, EFSCORRUPTED);
 	}
-#endif
 }
 
 static void
 xfs_agfl_write_verify(
 	struct xfs_buf	*bp)
 {
-	xfs_agfl_verify(bp);
-}
+	struct xfs_mount *mp = bp->b_target->bt_mount;
+	struct xfs_buf_log_item	*bip = bp->b_fspriv;
 
-static void
-xfs_agfl_read_verify(
-	struct xfs_buf	*bp)
-{
-	xfs_agfl_verify(bp);
+	/* no verification of non-crc AGFLs */
+	if (!xfs_sb_version_hascrc(&mp->m_sb))
+		return;
+
+	if (!xfs_agfl_verify(bp)) {
+		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
+		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		return;
+	}
+
+	if (bip)
+		XFS_BUF_TO_AGFL(bp)->agfl_lsn = cpu_to_be64(bip->bli_item.li_lsn);
+
+	xfs_update_cksum(bp->b_addr, BBTOB(bp->b_length),
+			 offsetof(struct xfs_agfl, agfl_crc));
 }
 
 const struct xfs_buf_ops xfs_agfl_buf_ops = {
@@ -1984,18 +2015,18 @@ xfs_alloc_get_freelist(
 	int		btreeblk) /* destination is a AGF btree */
 {
 	xfs_agf_t	*agf;	/* a.g. freespace structure */
-	xfs_agfl_t	*agfl;	/* a.g. freelist structure */
 	xfs_buf_t	*agflbp;/* buffer for a.g. freelist structure */
 	xfs_agblock_t	bno;	/* block number returned */
+	__be32		*agfl_bno;
 	int		error;
 	int		logflags;
-	xfs_mount_t	*mp;	/* mount structure */
+	xfs_mount_t	*mp = tp->t_mountp;
 	xfs_perag_t	*pag;	/* per allocation group data */
 
-	agf = XFS_BUF_TO_AGF(agbp);
 	/*
 	 * Freelist is empty, give up.
 	 */
+	agf = XFS_BUF_TO_AGF(agbp);
 	if (!agf->agf_flcount) {
 		*bnop = NULLAGBLOCK;
 		return 0;
@@ -2003,15 +2034,17 @@ xfs_alloc_get_freelist(
 	/*
 	 * Read the array of free blocks.
 	 */
-	mp = tp->t_mountp;
-	if ((error = xfs_alloc_read_agfl(mp, tp,
-			be32_to_cpu(agf->agf_seqno), &agflbp)))
+	error = xfs_alloc_read_agfl(mp, tp, be32_to_cpu(agf->agf_seqno),
+				    &agflbp);
+	if (error)
 		return error;
-	agfl = XFS_BUF_TO_AGFL(agflbp);
+
+
 	/*
 	 * Get the block number and update the data structures.
 	 */
-	bno = be32_to_cpu(agfl->agfl_bno[be32_to_cpu(agf->agf_flfirst)]);
+	agfl_bno = XFS_BUF_TO_AGFL_BNO(mp, agflbp);
+	bno = be32_to_cpu(agfl_bno[be32_to_cpu(agf->agf_flfirst)]);
 	be32_add_cpu(&agf->agf_flfirst, 1);
 	xfs_trans_brelse(tp, agflbp);
 	if (be32_to_cpu(agf->agf_flfirst) == XFS_AGFL_SIZE(mp))
@@ -2104,12 +2137,13 @@ xfs_alloc_put_freelist(
 	int			btreeblk) /* block came from a AGF btree */
 {
 	xfs_agf_t		*agf;	/* a.g. freespace structure */
-	xfs_agfl_t		*agfl;	/* a.g. free block array */
 	__be32			*blockp;/* pointer to array entry */
 	int			error;
 	int			logflags;
 	xfs_mount_t		*mp;	/* mount structure */
 	xfs_perag_t		*pag;	/* per allocation group data */
+	__be32			*agfl_bno;
+	int			startoff;
 
 	agf = XFS_BUF_TO_AGF(agbp);
 	mp = tp->t_mountp;
@@ -2117,7 +2151,6 @@ xfs_alloc_put_freelist(
 	if (!agflbp && (error = xfs_alloc_read_agfl(mp, tp,
 			be32_to_cpu(agf->agf_seqno), &agflbp)))
 		return error;
-	agfl = XFS_BUF_TO_AGFL(agflbp);
 	be32_add_cpu(&agf->agf_fllast, 1);
 	if (be32_to_cpu(agf->agf_fllast) == XFS_AGFL_SIZE(mp))
 		agf->agf_fllast = 0;
@@ -2138,13 +2171,17 @@ xfs_alloc_put_freelist(
 	xfs_alloc_log_agf(tp, agbp, logflags);
 
 	ASSERT(be32_to_cpu(agf->agf_flcount) <= XFS_AGFL_SIZE(mp));
-	blockp = &agfl->agfl_bno[be32_to_cpu(agf->agf_fllast)];
+
+	agfl_bno = XFS_BUF_TO_AGFL_BNO(mp, agflbp);
+	blockp = &agfl_bno[be32_to_cpu(agf->agf_fllast)];
 	*blockp = cpu_to_be32(bno);
+	startoff = (char *)blockp - (char *)agflbp->b_addr;
+
 	xfs_alloc_log_agf(tp, agbp, logflags);
-	xfs_trans_log_buf(tp, agflbp,
-		(int)((xfs_caddr_t)blockp - (xfs_caddr_t)agfl),
-		(int)((xfs_caddr_t)blockp - (xfs_caddr_t)agfl +
-			sizeof(xfs_agblock_t) - 1));
+
+	xfs_trans_buf_set_type(tp, agflbp, XFS_BLF_AGFL_BUF);
+	xfs_trans_log_buf(tp, agflbp, startoff,
+			  startoff + sizeof(xfs_agblock_t) - 1);
 	return 0;
 }
 
diff --git a/fs/xfs/xfs_buf_item.h b/fs/xfs/xfs_buf_item.h
index 76bd7a167a7..067d5f0fc23 100644
--- a/fs/xfs/xfs_buf_item.h
+++ b/fs/xfs/xfs_buf_item.h
@@ -46,13 +46,15 @@ extern kmem_zone_t	*xfs_buf_item_zone;
  */
 #define XFS_BLF_BTREE_BUF	(1<<5)
 #define XFS_BLF_AGF_BUF		(1<<6)
+#define XFS_BLF_AGFL_BUF	(1<<7)
 
 #define XFS_BLF_TYPE_MASK	\
 		(XFS_BLF_UDQUOT_BUF | \
 		 XFS_BLF_PDQUOT_BUF | \
 		 XFS_BLF_GDQUOT_BUF | \
 		 XFS_BLF_BTREE_BUF | \
-		 XFS_BLF_AGF_BUF)
+		 XFS_BLF_AGF_BUF | \
+		 XFS_BLF_AGFL_BUF)
 
 #define	XFS_BLF_CHUNK		128
 #define	XFS_BLF_SHIFT		7
diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c
index b6cca27e913..a693a54799e 100644
--- a/fs/xfs/xfs_fsops.c
+++ b/fs/xfs/xfs_fsops.c
@@ -268,6 +268,11 @@ xfs_growfs_data_private(
 		}
 
 		agfl = XFS_BUF_TO_AGFL(bp);
+		if (xfs_sb_version_hascrc(&mp->m_sb)) {
+			agfl->agfl_magicnum = cpu_to_be32(XFS_AGFL_MAGIC);
+			agfl->agfl_seqno = cpu_to_be32(agno);
+			uuid_copy(&agfl->agfl_uuid, &mp->m_sb.sb_uuid);
+		}
 		for (bucket = 0; bucket < XFS_AGFL_SIZE(mp); bucket++)
 			agfl->agfl_bno[bucket] = cpu_to_be32(NULLAGBLOCK);
 
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index dadf24566d1..da2a19e0554 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -1961,6 +1961,16 @@ xlog_recover_do_reg_buffer(
 		}
 		bp->b_ops = &xfs_agf_buf_ops;
 		break;
+	case XFS_BLF_AGFL_BUF:
+		if (!xfs_sb_version_hascrc(&mp->m_sb))
+			break;
+		if (*(__be32 *)bp->b_addr != cpu_to_be32(XFS_AGFL_MAGIC)) {
+			xfs_warn(mp, "Bad AGFL block magic!");
+			ASSERT(0);
+			break;
+		}
+		bp->b_ops = &xfs_agfl_buf_ops;
+		break;
 	default:
 		break;
 	}
-- 
cgit v1.2.3-70-g09d2


From 61fe135c1dde112f483bba01d645debd881b5428 Mon Sep 17 00:00:00 2001
From: Dave Chinner <dchinner@redhat.com>
Date: Wed, 3 Apr 2013 16:11:30 +1100
Subject: xfs: buffer type overruns blf_flags field

The buffer type passed to log recvoery in the buffer log item
overruns the blf_flags field. I had assumed that flags field was a
32 bit value, and it turns out it is a unisgned short. Therefore
having 19 flags doesn't really work.

Convert the buffer type field to numeric value, and use the top 5
bits of the flags field for it. We currently have 17 types of
buffers, so using 5 bits gives us plenty of room for expansion in
future....

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
---
 fs/xfs/xfs_alloc.c       |  4 +--
 fs/xfs/xfs_attr_leaf.c   |  6 ++--
 fs/xfs/xfs_bmap.c        |  2 +-
 fs/xfs/xfs_btree.c       |  8 ++---
 fs/xfs/xfs_buf_item.h    | 92 ++++++++++++++++++++++++++++--------------------
 fs/xfs/xfs_da_btree.c    | 12 +++----
 fs/xfs/xfs_dir2_block.c  |  4 +--
 fs/xfs/xfs_dir2_data.c   |  4 +--
 fs/xfs/xfs_dir2_leaf.c   | 12 +++----
 fs/xfs/xfs_dir2_node.c   | 10 +++---
 fs/xfs/xfs_ialloc.c      |  2 +-
 fs/xfs/xfs_log_recover.c | 38 ++++++++++----------
 fs/xfs/xfs_trans.h       |  4 ---
 fs/xfs/xfs_trans_buf.c   | 42 +++++++++++++++-------
 14 files changed, 134 insertions(+), 106 deletions(-)

(limited to 'fs/xfs/xfs_alloc.c')

diff --git a/fs/xfs/xfs_alloc.c b/fs/xfs/xfs_alloc.c
index 40d3d576f47..5673bcfda2f 100644
--- a/fs/xfs/xfs_alloc.c
+++ b/fs/xfs/xfs_alloc.c
@@ -2099,7 +2099,7 @@ xfs_alloc_log_agf(
 
 	trace_xfs_agf(tp->t_mountp, XFS_BUF_TO_AGF(bp), fields, _RET_IP_);
 
-	xfs_trans_buf_set_type(tp, bp, XFS_BLF_AGF_BUF);
+	xfs_trans_buf_set_type(tp, bp, XFS_BLFT_AGF_BUF);
 
 	xfs_btree_offsets(fields, offsets, XFS_AGF_NUM_BITS, &first, &last);
 	xfs_trans_log_buf(tp, bp, (uint)first, (uint)last);
@@ -2179,7 +2179,7 @@ xfs_alloc_put_freelist(
 
 	xfs_alloc_log_agf(tp, agbp, logflags);
 
-	xfs_trans_buf_set_type(tp, agflbp, XFS_BLF_AGFL_BUF);
+	xfs_trans_buf_set_type(tp, agflbp, XFS_BLFT_AGFL_BUF);
 	xfs_trans_log_buf(tp, agflbp, startoff,
 			  startoff + sizeof(xfs_agblock_t) - 1);
 	return 0;
diff --git a/fs/xfs/xfs_attr_leaf.c b/fs/xfs/xfs_attr_leaf.c
index 92cda03d1c0..08d5457c948 100644
--- a/fs/xfs/xfs_attr_leaf.c
+++ b/fs/xfs/xfs_attr_leaf.c
@@ -276,7 +276,7 @@ xfs_attr3_leaf_read(
 	err = xfs_da_read_buf(tp, dp, bno, mappedbno, bpp,
 				XFS_ATTR_FORK, &xfs_attr3_leaf_buf_ops);
 	if (!err && tp)
-		xfs_trans_buf_set_type(tp, *bpp, XFS_BLF_ATTR_LEAF_BUF);
+		xfs_trans_buf_set_type(tp, *bpp, XFS_BLFT_ATTR_LEAF_BUF);
 	return err;
 }
 
@@ -1083,7 +1083,7 @@ xfs_attr3_leaf_to_node(
 		goto out;
 
 	/* copy leaf to new buffer, update identifiers */
-	xfs_trans_buf_set_type(args->trans, bp2, XFS_BLF_ATTR_LEAF_BUF);
+	xfs_trans_buf_set_type(args->trans, bp2, XFS_BLFT_ATTR_LEAF_BUF);
 	bp2->b_ops = bp1->b_ops;
 	memcpy(bp2->b_addr, bp1->b_addr, XFS_LBSIZE(mp));
 	if (xfs_sb_version_hascrc(&mp->m_sb)) {
@@ -1146,7 +1146,7 @@ xfs_attr3_leaf_create(
 	if (error)
 		return error;
 	bp->b_ops = &xfs_attr3_leaf_buf_ops;
-	xfs_trans_buf_set_type(args->trans, bp, XFS_BLF_ATTR_LEAF_BUF);
+	xfs_trans_buf_set_type(args->trans, bp, XFS_BLFT_ATTR_LEAF_BUF);
 	leaf = bp->b_addr;
 	memset(leaf, 0, XFS_LBSIZE(mp));
 
diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c
index 2844724f507..89042848f9e 100644
--- a/fs/xfs/xfs_bmap.c
+++ b/fs/xfs/xfs_bmap.c
@@ -1338,7 +1338,7 @@ xfs_bmap_local_to_extents_init_fn(
 	ASSERT(0);
 	bp->b_ops = &xfs_bmbt_buf_ops;
 	memcpy(bp->b_addr, ifp->if_u1.if_data, ifp->if_bytes);
-	xfs_trans_buf_set_type(tp, bp, XFS_BLF_BTREE_BUF);
+	xfs_trans_buf_set_type(tp, bp, XFS_BLFT_BTREE_BUF);
 }
 
 /*
diff --git a/fs/xfs/xfs_btree.c b/fs/xfs/xfs_btree.c
index ec77036f13b..8804b8a3c31 100644
--- a/fs/xfs/xfs_btree.c
+++ b/fs/xfs/xfs_btree.c
@@ -1282,7 +1282,7 @@ xfs_btree_log_keys(
 	XFS_BTREE_TRACE_ARGBII(cur, bp, first, last);
 
 	if (bp) {
-		xfs_trans_buf_set_type(cur->bc_tp, bp, XFS_BLF_BTREE_BUF);
+		xfs_trans_buf_set_type(cur->bc_tp, bp, XFS_BLFT_BTREE_BUF);
 		xfs_trans_log_buf(cur->bc_tp, bp,
 				  xfs_btree_key_offset(cur, first),
 				  xfs_btree_key_offset(cur, last + 1) - 1);
@@ -1307,7 +1307,7 @@ xfs_btree_log_recs(
 	XFS_BTREE_TRACE_CURSOR(cur, XBT_ENTRY);
 	XFS_BTREE_TRACE_ARGBII(cur, bp, first, last);
 
-	xfs_trans_buf_set_type(cur->bc_tp, bp, XFS_BLF_BTREE_BUF);
+	xfs_trans_buf_set_type(cur->bc_tp, bp, XFS_BLFT_BTREE_BUF);
 	xfs_trans_log_buf(cur->bc_tp, bp,
 			  xfs_btree_rec_offset(cur, first),
 			  xfs_btree_rec_offset(cur, last + 1) - 1);
@@ -1332,7 +1332,7 @@ xfs_btree_log_ptrs(
 		struct xfs_btree_block	*block = XFS_BUF_TO_BLOCK(bp);
 		int			level = xfs_btree_get_level(block);
 
-		xfs_trans_buf_set_type(cur->bc_tp, bp, XFS_BLF_BTREE_BUF);
+		xfs_trans_buf_set_type(cur->bc_tp, bp, XFS_BLFT_BTREE_BUF);
 		xfs_trans_log_buf(cur->bc_tp, bp,
 				xfs_btree_ptr_offset(cur, first, level),
 				xfs_btree_ptr_offset(cur, last + 1, level) - 1);
@@ -1407,7 +1407,7 @@ xfs_btree_log_block(
 				  (cur->bc_flags & XFS_BTREE_LONG_PTRS) ?
 					loffsets : soffsets,
 				  nbits, &first, &last);
-		xfs_trans_buf_set_type(cur->bc_tp, bp, XFS_BLF_BTREE_BUF);
+		xfs_trans_buf_set_type(cur->bc_tp, bp, XFS_BLFT_BTREE_BUF);
 		xfs_trans_log_buf(cur->bc_tp, bp, first, last);
 	} else {
 		xfs_trans_log_inode(cur->bc_tp, cur->bc_private.b.ip,
diff --git a/fs/xfs/xfs_buf_item.h b/fs/xfs/xfs_buf_item.h
index 640adcfa414..2573d2a75fc 100644
--- a/fs/xfs/xfs_buf_item.h
+++ b/fs/xfs/xfs_buf_item.h
@@ -39,45 +39,6 @@ extern kmem_zone_t	*xfs_buf_item_zone;
 #define XFS_BLF_PDQUOT_BUF	(1<<3)
 #define	XFS_BLF_GDQUOT_BUF	(1<<4)
 
-/*
- * all buffers now need flags to tell recovery where the magic number
- * is so that it can verify and calculate the CRCs on the buffer correctly
- * once the changes have been replayed into the buffer.
- */
-#define XFS_BLF_BTREE_BUF	(1<<5)
-#define XFS_BLF_AGF_BUF		(1<<6)
-#define XFS_BLF_AGFL_BUF	(1<<7)
-#define XFS_BLF_AGI_BUF		(1<<8)
-#define XFS_BLF_DINO_BUF	(1<<9)
-#define XFS_BLF_SYMLINK_BUF	(1<<10)
-#define XFS_BLF_DIR_BLOCK_BUF	(1<<11)
-#define XFS_BLF_DIR_DATA_BUF	(1<<12)
-#define XFS_BLF_DIR_FREE_BUF	(1<<13)
-#define XFS_BLF_DIR_LEAF1_BUF	(1<<14)
-#define XFS_BLF_DIR_LEAFN_BUF	(1<<15)
-#define XFS_BLF_DA_NODE_BUF	(1<<16)
-#define XFS_BLF_ATTR_LEAF_BUF	(1<<17)
-#define XFS_BLF_ATTR_RMT_BUF	(1<<18)
-
-#define XFS_BLF_TYPE_MASK	\
-		(XFS_BLF_UDQUOT_BUF | \
-		 XFS_BLF_PDQUOT_BUF | \
-		 XFS_BLF_GDQUOT_BUF | \
-		 XFS_BLF_BTREE_BUF | \
-		 XFS_BLF_AGF_BUF | \
-		 XFS_BLF_AGFL_BUF | \
-		 XFS_BLF_AGI_BUF | \
-		 XFS_BLF_DINO_BUF | \
-		 XFS_BLF_SYMLINK_BUF | \
-		 XFS_BLF_DIR_BLOCK_BUF | \
-		 XFS_BLF_DIR_DATA_BUF | \
-		 XFS_BLF_DIR_FREE_BUF | \
-		 XFS_BLF_DIR_LEAF1_BUF | \
-		 XFS_BLF_DIR_LEAFN_BUF | \
-		 XFS_BLF_DA_NODE_BUF | \
-		 XFS_BLF_ATTR_LEAF_BUF | \
-		 XFS_BLF_ATTR_RMT_BUF)
-
 #define	XFS_BLF_CHUNK		128
 #define	XFS_BLF_SHIFT		7
 #define	BIT_TO_WORD_SHIFT	5
@@ -100,6 +61,55 @@ typedef struct xfs_buf_log_format {
 	unsigned int	blf_data_map[XFS_BLF_DATAMAP_SIZE]; /* dirty bitmap */
 } xfs_buf_log_format_t;
 
+/*
+ * All buffers now need to tell recovery where the magic number
+ * is so that it can verify and calculate the CRCs on the buffer correctly
+ * once the changes have been replayed into the buffer.
+ *
+ * The type value is held in the upper 5 bits of the blf_flags field, which is
+ * an unsigned 16 bit field. Hence we need to shift it 11 bits up and down.
+ */
+#define XFS_BLFT_BITS	5
+#define XFS_BLFT_SHIFT	11
+#define XFS_BLFT_MASK	(((1 << XFS_BLFT_BITS) - 1) << XFS_BLFT_SHIFT)
+
+enum xfs_blft {
+	XFS_BLFT_UNKNOWN_BUF = 0,
+	XFS_BLFT_UDQUOT_BUF,
+	XFS_BLFT_PDQUOT_BUF,
+	XFS_BLFT_GDQUOT_BUF,
+	XFS_BLFT_BTREE_BUF,
+	XFS_BLFT_AGF_BUF,
+	XFS_BLFT_AGFL_BUF,
+	XFS_BLFT_AGI_BUF,
+	XFS_BLFT_DINO_BUF,
+	XFS_BLFT_SYMLINK_BUF,
+	XFS_BLFT_DIR_BLOCK_BUF,
+	XFS_BLFT_DIR_DATA_BUF,
+	XFS_BLFT_DIR_FREE_BUF,
+	XFS_BLFT_DIR_LEAF1_BUF,
+	XFS_BLFT_DIR_LEAFN_BUF,
+	XFS_BLFT_DA_NODE_BUF,
+	XFS_BLFT_ATTR_LEAF_BUF,
+	XFS_BLFT_ATTR_RMT_BUF,
+	XFS_BLFT_SB_BUF,
+	XFS_BLFT_MAX_BUF = (1 << XFS_BLFT_BITS),
+};
+
+static inline void
+xfs_blft_to_flags(struct xfs_buf_log_format *blf, enum xfs_blft type)
+{
+	ASSERT(type > XFS_BLFT_UNKNOWN_BUF && type < XFS_BLFT_MAX_BUF);
+	blf->blf_flags &= ~XFS_BLFT_MASK;
+	blf->blf_flags |= ((type << XFS_BLFT_SHIFT) & XFS_BLFT_MASK);
+}
+
+static inline __uint16_t
+xfs_blft_from_flags(struct xfs_buf_log_format *blf)
+{
+	return (blf->blf_flags & XFS_BLFT_MASK) >> XFS_BLFT_SHIFT;
+}
+
 /*
  * buf log item flags
  */
@@ -153,6 +163,10 @@ void	xfs_buf_attach_iodone(struct xfs_buf *,
 void	xfs_buf_iodone_callbacks(struct xfs_buf *);
 void	xfs_buf_iodone(struct xfs_buf *, struct xfs_log_item *);
 
+void	xfs_trans_buf_set_type(struct xfs_trans *, struct xfs_buf *,
+			       enum xfs_blft);
+void	xfs_trans_buf_copy_type(struct xfs_buf *dst_bp, struct xfs_buf *src_bp);
+
 #endif	/* __KERNEL__ */
 
 #endif	/* __XFS_BUF_ITEM_H__ */
diff --git a/fs/xfs/xfs_da_btree.c b/fs/xfs/xfs_da_btree.c
index 5aebd9bd44d..56814e305de 100644
--- a/fs/xfs/xfs_da_btree.c
+++ b/fs/xfs/xfs_da_btree.c
@@ -312,15 +312,15 @@ xfs_da3_node_read(
 		switch (be16_to_cpu(info->magic)) {
 		case XFS_DA3_NODE_MAGIC:
 		case XFS_DA_NODE_MAGIC:
-			type = XFS_BLF_DA_NODE_BUF;
+			type = XFS_BLFT_DA_NODE_BUF;
 			break;
 		case XFS_ATTR_LEAF_MAGIC:
 		case XFS_ATTR3_LEAF_MAGIC:
-			type = XFS_BLF_ATTR_LEAF_BUF;
+			type = XFS_BLFT_ATTR_LEAF_BUF;
 			break;
 		case XFS_DIR2_LEAFN_MAGIC:
 		case XFS_DIR3_LEAFN_MAGIC:
-			type = XFS_BLF_DIR_LEAFN_BUF;
+			type = XFS_BLFT_DIR_LEAFN_BUF;
 			break;
 		default:
 			type = 0;
@@ -361,7 +361,7 @@ xfs_da3_node_create(
 	if (error)
 		return(error);
 	bp->b_ops = &xfs_da3_node_buf_ops;
-	xfs_trans_buf_set_type(tp, bp, XFS_BLF_DA_NODE_BUF);
+	xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DA_NODE_BUF);
 	node = bp->b_addr;
 
 	if (xfs_sb_version_hascrc(&mp->m_sb)) {
@@ -597,7 +597,7 @@ xfs_da3_root_split(
 		 * we are about to copy oldroot to bp, so set up the type
 		 * of bp while we know exactly what it will be.
 		 */
-		xfs_trans_buf_set_type(tp, bp, XFS_BLF_DA_NODE_BUF);
+		xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DA_NODE_BUF);
 	} else {
 		struct xfs_dir3_icleaf_hdr leafhdr;
 		struct xfs_dir2_leaf_entry *ents;
@@ -615,7 +615,7 @@ xfs_da3_root_split(
 		 * we are about to copy oldroot to bp, so set up the type
 		 * of bp while we know exactly what it will be.
 		 */
-		xfs_trans_buf_set_type(tp, bp, XFS_BLF_DIR_LEAFN_BUF);
+		xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DIR_LEAFN_BUF);
 	}
 
 	/*
diff --git a/fs/xfs/xfs_dir2_block.c b/fs/xfs/xfs_dir2_block.c
index 58816ecdbba..e59f5fc816f 100644
--- a/fs/xfs/xfs_dir2_block.c
+++ b/fs/xfs/xfs_dir2_block.c
@@ -137,7 +137,7 @@ xfs_dir3_block_read(
 	err = xfs_da_read_buf(tp, dp, mp->m_dirdatablk, -1, bpp,
 				XFS_DATA_FORK, &xfs_dir3_block_buf_ops);
 	if (!err && tp)
-		xfs_trans_buf_set_type(tp, *bpp, XFS_BLF_DIR_BLOCK_BUF);
+		xfs_trans_buf_set_type(tp, *bpp, XFS_BLFT_DIR_BLOCK_BUF);
 	return err;
 }
 
@@ -151,7 +151,7 @@ xfs_dir3_block_init(
 	struct xfs_dir3_blk_hdr *hdr3 = bp->b_addr;
 
 	bp->b_ops = &xfs_dir3_block_buf_ops;
-	xfs_trans_buf_set_type(tp, bp, XFS_BLF_DIR_BLOCK_BUF);
+	xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DIR_BLOCK_BUF);
 
 	if (xfs_sb_version_hascrc(&mp->m_sb)) {
 		memset(hdr3, 0, sizeof(*hdr3));
diff --git a/fs/xfs/xfs_dir2_data.c b/fs/xfs/xfs_dir2_data.c
index 5e0c711f9af..c2930238005 100644
--- a/fs/xfs/xfs_dir2_data.c
+++ b/fs/xfs/xfs_dir2_data.c
@@ -306,7 +306,7 @@ xfs_dir3_data_read(
 	err = xfs_da_read_buf(tp, dp, bno, mapped_bno, bpp,
 				XFS_DATA_FORK, &xfs_dir3_data_buf_ops);
 	if (!err && tp)
-		xfs_trans_buf_set_type(tp, *bpp, XFS_BLF_DIR_DATA_BUF);
+		xfs_trans_buf_set_type(tp, *bpp, XFS_BLFT_DIR_DATA_BUF);
 	return err;
 }
 
@@ -576,7 +576,7 @@ xfs_dir3_data_init(
 	if (error)
 		return error;
 	bp->b_ops = &xfs_dir3_data_buf_ops;
-	xfs_trans_buf_set_type(tp, bp, XFS_BLF_DIR_DATA_BUF);
+	xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DIR_DATA_BUF);
 
 	/*
 	 * Initialize the header.
diff --git a/fs/xfs/xfs_dir2_leaf.c b/fs/xfs/xfs_dir2_leaf.c
index 84f4c9cfe95..721ba2fe8e5 100644
--- a/fs/xfs/xfs_dir2_leaf.c
+++ b/fs/xfs/xfs_dir2_leaf.c
@@ -302,7 +302,7 @@ xfs_dir3_leaf_read(
 	err = xfs_da_read_buf(tp, dp, fbno, mappedbno, bpp,
 				XFS_DATA_FORK, &xfs_dir3_leaf1_buf_ops);
 	if (!err && tp)
-		xfs_trans_buf_set_type(tp, *bpp, XFS_BLF_DIR_LEAF1_BUF);
+		xfs_trans_buf_set_type(tp, *bpp, XFS_BLFT_DIR_LEAF1_BUF);
 	return err;
 }
 
@@ -319,7 +319,7 @@ xfs_dir3_leafn_read(
 	err = xfs_da_read_buf(tp, dp, fbno, mappedbno, bpp,
 				XFS_DATA_FORK, &xfs_dir3_leafn_buf_ops);
 	if (!err && tp)
-		xfs_trans_buf_set_type(tp, *bpp, XFS_BLF_DIR_LEAFN_BUF);
+		xfs_trans_buf_set_type(tp, *bpp, XFS_BLFT_DIR_LEAFN_BUF);
 	return err;
 }
 
@@ -364,10 +364,10 @@ xfs_dir3_leaf_init(
 		ltp = xfs_dir2_leaf_tail_p(mp, leaf);
 		ltp->bestcount = 0;
 		bp->b_ops = &xfs_dir3_leaf1_buf_ops;
-		xfs_trans_buf_set_type(tp, bp, XFS_BLF_DIR_LEAF1_BUF);
+		xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DIR_LEAF1_BUF);
 	} else {
 		bp->b_ops = &xfs_dir3_leafn_buf_ops;
-		xfs_trans_buf_set_type(tp, bp, XFS_BLF_DIR_LEAFN_BUF);
+		xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DIR_LEAFN_BUF);
 	}
 }
 
@@ -488,7 +488,7 @@ xfs_dir2_block_to_leaf(
 	 * Fix up the block header, make it a data block.
 	 */
 	dbp->b_ops = &xfs_dir3_data_buf_ops;
-	xfs_trans_buf_set_type(tp, dbp, XFS_BLF_DIR_DATA_BUF);
+	xfs_trans_buf_set_type(tp, dbp, XFS_BLFT_DIR_DATA_BUF);
 	if (hdr->magic == cpu_to_be32(XFS_DIR2_BLOCK_MAGIC))
 		hdr->magic = cpu_to_be32(XFS_DIR2_DATA_MAGIC);
 	else
@@ -2197,7 +2197,7 @@ xfs_dir2_node_to_leaf(
 		xfs_dir3_leaf_compact(args, &leafhdr, lbp);
 
 	lbp->b_ops = &xfs_dir3_leaf1_buf_ops;
-	xfs_trans_buf_set_type(tp, lbp, XFS_BLF_DIR_LEAF1_BUF);
+	xfs_trans_buf_set_type(tp, lbp, XFS_BLFT_DIR_LEAF1_BUF);
 	leafhdr.magic = (leafhdr.magic == XFS_DIR2_LEAFN_MAGIC)
 					? XFS_DIR2_LEAF1_MAGIC
 					: XFS_DIR3_LEAF1_MAGIC;
diff --git a/fs/xfs/xfs_dir2_node.c b/fs/xfs/xfs_dir2_node.c
index 1806a22d559..ecc6c661064 100644
--- a/fs/xfs/xfs_dir2_node.c
+++ b/fs/xfs/xfs_dir2_node.c
@@ -168,7 +168,7 @@ __xfs_dir3_free_read(
 
 	/* try read returns without an error or *bpp if it lands in a hole */
 	if (!err && tp && *bpp)
-		xfs_trans_buf_set_type(tp, *bpp, XFS_BLF_DIR_FREE_BUF);
+		xfs_trans_buf_set_type(tp, *bpp, XFS_BLFT_DIR_FREE_BUF);
 	return err;
 }
 
@@ -256,7 +256,7 @@ xfs_dir3_free_get_buf(
 	if (error)
 		return error;
 
-	xfs_trans_buf_set_type(tp, bp, XFS_BLF_DIR_FREE_BUF);
+	xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DIR_FREE_BUF);
 	bp->b_ops = &xfs_dir3_free_buf_ops;
 
 	/*
@@ -404,7 +404,7 @@ xfs_dir2_leaf_to_node(
 	else
 		leaf->hdr.info.magic = cpu_to_be16(XFS_DIR3_LEAFN_MAGIC);
 	lbp->b_ops = &xfs_dir3_leafn_buf_ops;
-	xfs_trans_buf_set_type(tp, lbp, XFS_BLF_DIR_LEAFN_BUF);
+	xfs_trans_buf_set_type(tp, lbp, XFS_BLFT_DIR_LEAFN_BUF);
 	xfs_dir3_leaf_log_header(tp, lbp);
 	xfs_dir3_leaf_check(mp, lbp);
 	return 0;
@@ -820,7 +820,7 @@ xfs_dir2_leafn_lookup_for_entry(
 							(char *)curbp->b_addr);
 			state->extrablk.magic = XFS_DIR2_DATA_MAGIC;
 			curbp->b_ops = &xfs_dir3_data_buf_ops;
-			xfs_trans_buf_set_type(tp, curbp, XFS_BLF_DIR_DATA_BUF);
+			xfs_trans_buf_set_type(tp, curbp, XFS_BLFT_DIR_DATA_BUF);
 			if (cmp == XFS_CMP_EXACT)
 				return XFS_ERROR(EEXIST);
 		}
@@ -835,7 +835,7 @@ xfs_dir2_leafn_lookup_for_entry(
 			state->extrablk.blkno = curdb;
 			state->extrablk.magic = XFS_DIR2_DATA_MAGIC;
 			curbp->b_ops = &xfs_dir3_data_buf_ops;
-			xfs_trans_buf_set_type(tp, curbp, XFS_BLF_DIR_DATA_BUF);
+			xfs_trans_buf_set_type(tp, curbp, XFS_BLFT_DIR_DATA_BUF);
 		} else {
 			/* If the curbp is not the CI match block, drop it */
 			if (state->extrablk.bp != curbp)
diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c
index 3039f829c96..c8f5ae1debf 100644
--- a/fs/xfs/xfs_ialloc.c
+++ b/fs/xfs/xfs_ialloc.c
@@ -1487,7 +1487,7 @@ xfs_ialloc_log_agi(
 	/*
 	 * Log the allocation group inode header buffer.
 	 */
-	xfs_trans_buf_set_type(tp, bp, XFS_BLF_AGI_BUF);
+	xfs_trans_buf_set_type(tp, bp, XFS_BLFT_AGI_BUF);
 	xfs_trans_log_buf(tp, bp, first, last);
 }
 
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index 00727bc4a9b..86285071700 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -1888,8 +1888,8 @@ xlog_recovery_validate_buf_type(
 	magic32 = be32_to_cpu(*(__be32 *)bp->b_addr);
 	magic16 = be16_to_cpu(*(__be16*)bp->b_addr);
 	magicda = be16_to_cpu(info->magic);
-	switch (buf_f->blf_flags & XFS_BLF_TYPE_MASK) {
-	case XFS_BLF_BTREE_BUF:
+	switch (xfs_blft_from_flags(buf_f)) {
+	case XFS_BLFT_BTREE_BUF:
 		switch (magic32) {
 		case XFS_ABTB_CRC_MAGIC:
 		case XFS_ABTC_CRC_MAGIC:
@@ -1911,7 +1911,7 @@ xlog_recovery_validate_buf_type(
 			break;
 		}
 		break;
-	case XFS_BLF_AGF_BUF:
+	case XFS_BLFT_AGF_BUF:
 		if (magic32 != XFS_AGF_MAGIC) {
 			xfs_warn(mp, "Bad AGF block magic!");
 			ASSERT(0);
@@ -1919,7 +1919,7 @@ xlog_recovery_validate_buf_type(
 		}
 		bp->b_ops = &xfs_agf_buf_ops;
 		break;
-	case XFS_BLF_AGFL_BUF:
+	case XFS_BLFT_AGFL_BUF:
 		if (!xfs_sb_version_hascrc(&mp->m_sb))
 			break;
 		if (magic32 != XFS_AGFL_MAGIC) {
@@ -1929,7 +1929,7 @@ xlog_recovery_validate_buf_type(
 		}
 		bp->b_ops = &xfs_agfl_buf_ops;
 		break;
-	case XFS_BLF_AGI_BUF:
+	case XFS_BLFT_AGI_BUF:
 		if (magic32 != XFS_AGI_MAGIC) {
 			xfs_warn(mp, "Bad AGI block magic!");
 			ASSERT(0);
@@ -1937,9 +1937,9 @@ xlog_recovery_validate_buf_type(
 		}
 		bp->b_ops = &xfs_agi_buf_ops;
 		break;
-	case XFS_BLF_UDQUOT_BUF:
-	case XFS_BLF_PDQUOT_BUF:
-	case XFS_BLF_GDQUOT_BUF:
+	case XFS_BLFT_UDQUOT_BUF:
+	case XFS_BLFT_PDQUOT_BUF:
+	case XFS_BLFT_GDQUOT_BUF:
 		if (magic16 != XFS_DQUOT_MAGIC) {
 			xfs_warn(mp, "Bad DQUOT block magic!");
 			ASSERT(0);
@@ -1947,7 +1947,7 @@ xlog_recovery_validate_buf_type(
 		}
 		bp->b_ops = &xfs_dquot_buf_ops;
 		break;
-	case XFS_BLF_DINO_BUF:
+	case XFS_BLFT_DINO_BUF:
 		/*
 		 * we get here with inode allocation buffers, not buffers that
 		 * track unlinked list changes.
@@ -1959,7 +1959,7 @@ xlog_recovery_validate_buf_type(
 		}
 		bp->b_ops = &xfs_inode_buf_ops;
 		break;
-	case XFS_BLF_SYMLINK_BUF:
+	case XFS_BLFT_SYMLINK_BUF:
 		if (magic32 != XFS_SYMLINK_MAGIC) {
 			xfs_warn(mp, "Bad symlink block magic!");
 			ASSERT(0);
@@ -1967,7 +1967,7 @@ xlog_recovery_validate_buf_type(
 		}
 		bp->b_ops = &xfs_symlink_buf_ops;
 		break;
-	case XFS_BLF_DIR_BLOCK_BUF:
+	case XFS_BLFT_DIR_BLOCK_BUF:
 		if (magic32 != XFS_DIR2_BLOCK_MAGIC &&
 		    magic32 != XFS_DIR3_BLOCK_MAGIC) {
 			xfs_warn(mp, "Bad dir block magic!");
@@ -1976,7 +1976,7 @@ xlog_recovery_validate_buf_type(
 		}
 		bp->b_ops = &xfs_dir3_block_buf_ops;
 		break;
-	case XFS_BLF_DIR_DATA_BUF:
+	case XFS_BLFT_DIR_DATA_BUF:
 		if (magic32 != XFS_DIR2_DATA_MAGIC &&
 		    magic32 != XFS_DIR3_DATA_MAGIC) {
 			xfs_warn(mp, "Bad dir data magic!");
@@ -1985,7 +1985,7 @@ xlog_recovery_validate_buf_type(
 		}
 		bp->b_ops = &xfs_dir3_data_buf_ops;
 		break;
-	case XFS_BLF_DIR_FREE_BUF:
+	case XFS_BLFT_DIR_FREE_BUF:
 		if (magic32 != XFS_DIR2_FREE_MAGIC &&
 		    magic32 != XFS_DIR3_FREE_MAGIC) {
 			xfs_warn(mp, "Bad dir3 free magic!");
@@ -1994,7 +1994,7 @@ xlog_recovery_validate_buf_type(
 		}
 		bp->b_ops = &xfs_dir3_free_buf_ops;
 		break;
-	case XFS_BLF_DIR_LEAF1_BUF:
+	case XFS_BLFT_DIR_LEAF1_BUF:
 		if (magicda != XFS_DIR2_LEAF1_MAGIC &&
 		    magicda != XFS_DIR3_LEAF1_MAGIC) {
 			xfs_warn(mp, "Bad dir leaf1 magic!");
@@ -2003,7 +2003,7 @@ xlog_recovery_validate_buf_type(
 		}
 		bp->b_ops = &xfs_dir3_leaf1_buf_ops;
 		break;
-	case XFS_BLF_DIR_LEAFN_BUF:
+	case XFS_BLFT_DIR_LEAFN_BUF:
 		if (magicda != XFS_DIR2_LEAFN_MAGIC &&
 		    magicda != XFS_DIR3_LEAFN_MAGIC) {
 			xfs_warn(mp, "Bad dir leafn magic!");
@@ -2012,7 +2012,7 @@ xlog_recovery_validate_buf_type(
 		}
 		bp->b_ops = &xfs_dir3_leafn_buf_ops;
 		break;
-	case XFS_BLF_DA_NODE_BUF:
+	case XFS_BLFT_DA_NODE_BUF:
 		if (magicda != XFS_DA_NODE_MAGIC &&
 		    magicda != XFS_DA3_NODE_MAGIC) {
 			xfs_warn(mp, "Bad da node magic!");
@@ -2021,7 +2021,7 @@ xlog_recovery_validate_buf_type(
 		}
 		bp->b_ops = &xfs_da3_node_buf_ops;
 		break;
-	case XFS_BLF_ATTR_LEAF_BUF:
+	case XFS_BLFT_ATTR_LEAF_BUF:
 		if (magicda != XFS_ATTR_LEAF_MAGIC &&
 		    magicda != XFS_ATTR3_LEAF_MAGIC) {
 			xfs_warn(mp, "Bad attr leaf magic!");
@@ -2030,7 +2030,7 @@ xlog_recovery_validate_buf_type(
 		}
 		bp->b_ops = &xfs_attr3_leaf_buf_ops;
 		break;
-	case XFS_BLF_ATTR_RMT_BUF:
+	case XFS_BLFT_ATTR_RMT_BUF:
 		if (!xfs_sb_version_hascrc(&mp->m_sb))
 			break;
 		if (magicda != XFS_ATTR3_RMT_MAGIC) {
@@ -2041,6 +2041,8 @@ xlog_recovery_validate_buf_type(
 		bp->b_ops = &xfs_attr3_rmt_buf_ops;
 		break;
 	default:
+		xfs_warn(mp, "Unknown buffer type %d!",
+			 xfs_blft_from_flags(buf_f));
 		break;
 	}
 }
diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h
index fa78a3f87c6..cd29f617102 100644
--- a/fs/xfs/xfs_trans.h
+++ b/fs/xfs/xfs_trans.h
@@ -505,10 +505,6 @@ void		xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
 void		xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);
 void		xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);
 void		xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);
-void		xfs_trans_buf_set_type(struct xfs_trans *, struct xfs_buf *,
-				       uint);
-void		xfs_trans_buf_copy_type(struct xfs_buf *dst_bp,
-					struct xfs_buf *src_bp);
 void		xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int);
 void		xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint);
 void		xfs_trans_log_buf(xfs_trans_t *, struct xfs_buf *, uint, uint);
diff --git a/fs/xfs/xfs_trans_buf.c b/fs/xfs/xfs_trans_buf.c
index 40871bf607f..73a5fa457e1 100644
--- a/fs/xfs/xfs_trans_buf.c
+++ b/fs/xfs/xfs_trans_buf.c
@@ -659,7 +659,7 @@ xfs_trans_binval(
 		ASSERT(XFS_BUF_ISSTALE(bp));
 		ASSERT(!(bip->bli_flags & (XFS_BLI_LOGGED | XFS_BLI_DIRTY)));
 		ASSERT(!(bip->__bli_format.blf_flags & XFS_BLF_INODE_BUF));
-		ASSERT(!(bip->__bli_format.blf_flags & XFS_BLF_TYPE_MASK));
+		ASSERT(!(bip->__bli_format.blf_flags & XFS_BLFT_MASK));
 		ASSERT(bip->__bli_format.blf_flags & XFS_BLF_CANCEL);
 		ASSERT(bip->bli_item.li_desc->lid_flags & XFS_LID_DIRTY);
 		ASSERT(tp->t_flags & XFS_TRANS_DIRTY);
@@ -672,7 +672,7 @@ xfs_trans_binval(
 	bip->bli_flags &= ~(XFS_BLI_INODE_BUF | XFS_BLI_LOGGED | XFS_BLI_DIRTY);
 	bip->__bli_format.blf_flags &= ~XFS_BLF_INODE_BUF;
 	bip->__bli_format.blf_flags |= XFS_BLF_CANCEL;
-	bip->__bli_format.blf_flags &= ~XFS_BLF_TYPE_MASK;
+	bip->__bli_format.blf_flags &= ~XFS_BLFT_MASK;
 	for (i = 0; i < bip->bli_format_count; i++) {
 		memset(bip->bli_formats[i].blf_data_map, 0,
 		       (bip->bli_formats[i].blf_map_size * sizeof(uint)));
@@ -704,7 +704,7 @@ xfs_trans_inode_buf(
 	ASSERT(atomic_read(&bip->bli_refcount) > 0);
 
 	bip->bli_flags |= XFS_BLI_INODE_BUF;
-	xfs_trans_buf_set_type(tp, bp, XFS_BLF_DINO_BUF);
+	xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DINO_BUF);
 }
 
 /*
@@ -729,7 +729,7 @@ xfs_trans_stale_inode_buf(
 
 	bip->bli_flags |= XFS_BLI_STALE_INODE;
 	bip->bli_item.li_cb = xfs_buf_iodone;
-	xfs_trans_buf_set_type(tp, bp, XFS_BLF_DINO_BUF);
+	xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DINO_BUF);
 }
 
 /*
@@ -753,7 +753,7 @@ xfs_trans_inode_alloc_buf(
 	ASSERT(atomic_read(&bip->bli_refcount) > 0);
 
 	bip->bli_flags |= XFS_BLI_INODE_ALLOC_BUF;
-	xfs_trans_buf_set_type(tp, bp, XFS_BLF_DINO_BUF);
+	xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DINO_BUF);
 }
 
 /*
@@ -764,7 +764,7 @@ void
 xfs_trans_buf_set_type(
 	struct xfs_trans	*tp,
 	struct xfs_buf		*bp,
-	uint			type)
+	enum xfs_blft		type)
 {
 	struct xfs_buf_log_item	*bip = bp->b_fspriv;
 
@@ -774,10 +774,8 @@ xfs_trans_buf_set_type(
 	ASSERT(bp->b_transp == tp);
 	ASSERT(bip != NULL);
 	ASSERT(atomic_read(&bip->bli_refcount) > 0);
-	ASSERT((type & XFS_BLF_TYPE_MASK) != 0);
 
-	bip->__bli_format.blf_flags &= ~XFS_BLF_TYPE_MASK;
-	bip->__bli_format.blf_flags |= type;
+	xfs_blft_to_flags(&bip->__bli_format, type);
 }
 
 void
@@ -787,11 +785,10 @@ xfs_trans_buf_copy_type(
 {
 	struct xfs_buf_log_item	*sbip = src_bp->b_fspriv;
 	struct xfs_buf_log_item	*dbip = dst_bp->b_fspriv;
-	uint			type;
+	enum xfs_blft		type;
 
-	type = sbip->__bli_format.blf_flags & XFS_BLF_TYPE_MASK;
-	dbip->__bli_format.blf_flags &= ~XFS_BLF_TYPE_MASK;
-	dbip->__bli_format.blf_flags |= type;
+	type = xfs_blft_from_flags(&sbip->__bli_format);
+	xfs_blft_to_flags(&dbip->__bli_format, type);
 }
 
 /*
@@ -811,9 +808,28 @@ xfs_trans_dquot_buf(
 	xfs_buf_t	*bp,
 	uint		type)
 {
+	struct xfs_buf_log_item	*bip = bp->b_fspriv;
+
 	ASSERT(type == XFS_BLF_UDQUOT_BUF ||
 	       type == XFS_BLF_PDQUOT_BUF ||
 	       type == XFS_BLF_GDQUOT_BUF);
 
+	bip->__bli_format.blf_flags |= type;
+
+	switch (type) {
+	case XFS_BLF_UDQUOT_BUF:
+		type = XFS_BLFT_UDQUOT_BUF;
+		break;
+	case XFS_BLF_PDQUOT_BUF:
+		type = XFS_BLFT_PDQUOT_BUF;
+		break;
+	case XFS_BLF_GDQUOT_BUF:
+		type = XFS_BLFT_GDQUOT_BUF;
+		break;
+	default:
+		type = XFS_BLFT_UNKNOWN_BUF;
+		break;
+	}
+
 	xfs_trans_buf_set_type(tp, bp, type);
 }
-- 
cgit v1.2.3-70-g09d2