diff --git a/fs/xfs/Makefile b/fs/xfs/Makefile
index a096841..f646391 100644
--- a/fs/xfs/Makefile
+++ b/fs/xfs/Makefile
@@ -84,6 +84,7 @@
 				   xfs_message.o \
 				   xfs_mount.o \
 				   xfs_mru_cache.o \
+				   xfs_stats.o \
 				   xfs_super.o \
 				   xfs_symlink.o \
 				   xfs_sysfs.o \
@@ -118,7 +119,6 @@
 xfs-$(CONFIG_XFS_RT)		+= xfs_rtalloc.o
 
 xfs-$(CONFIG_XFS_POSIX_ACL)	+= xfs_acl.o
-xfs-$(CONFIG_PROC_FS)		+= xfs_stats.o
 xfs-$(CONFIG_SYSCTL)		+= xfs_sysctl.o
 xfs-$(CONFIG_COMPAT)		+= xfs_ioctl32.o
 xfs-$(CONFIG_NFSD_PNFS)		+= xfs_pnfs.o
diff --git a/fs/xfs/kmem.c b/fs/xfs/kmem.c
index a7a3a63..686ba6f 100644
--- a/fs/xfs/kmem.c
+++ b/fs/xfs/kmem.c
@@ -55,8 +55,9 @@
 			return ptr;
 		if (!(++retries % 100))
 			xfs_err(NULL,
-		"possible memory allocation deadlock in %s (mode:0x%x)",
-					__func__, lflags);
+	"%s(%u) possible memory allocation deadlock size %u in %s (mode:0x%x)",
+				current->comm, current->pid,
+				(unsigned int)size, __func__, lflags);
 		congestion_wait(BLK_RW_ASYNC, HZ/50);
 	} while (1);
 }
@@ -120,8 +121,9 @@
 			return ptr;
 		if (!(++retries % 100))
 			xfs_err(NULL,
-		"possible memory allocation deadlock in %s (mode:0x%x)",
-					__func__, lflags);
+		"%s(%u) possible memory allocation deadlock in %s (mode:0x%x)",
+				current->comm, current->pid,
+				__func__, lflags);
 		congestion_wait(BLK_RW_ASYNC, HZ/50);
 	} while (1);
 }
diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c
index 4cffc17..3479294 100644
--- a/fs/xfs/libxfs/xfs_alloc.c
+++ b/fs/xfs/libxfs/xfs_alloc.c
@@ -482,7 +482,9 @@
 		    be32_to_cpu(agfl->agfl_bno[i]) >= mp->m_sb.sb_agblocks)
 			return false;
 	}
-	return true;
+
+	return xfs_log_check_lsn(mp,
+				 be64_to_cpu(XFS_BUF_TO_AGFL(bp)->agfl_lsn));
 }
 
 static void
@@ -651,8 +653,8 @@
 				 -((long)(args->len)));
 	}
 
-	XFS_STATS_INC(xs_allocx);
-	XFS_STATS_ADD(xs_allocb, args->len);
+	XFS_STATS_INC(args->mp, xs_allocx);
+	XFS_STATS_ADD(args->mp, xs_allocb, args->len);
 	return error;
 }
 
@@ -1808,8 +1810,8 @@
 
 	if (!isfl)
 		xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, (long)len);
-	XFS_STATS_INC(xs_freex);
-	XFS_STATS_ADD(xs_freeb, len);
+	XFS_STATS_INC(mp, xs_freex);
+	XFS_STATS_ADD(mp, xs_freeb, len);
 
 	trace_xfs_free_extent(mp, agno, bno, len, isfl, haveleft, haveright);
 
@@ -2259,9 +2261,13 @@
  {
 	struct xfs_agf	*agf = XFS_BUF_TO_AGF(bp);
 
-	if (xfs_sb_version_hascrc(&mp->m_sb) &&
-	    !uuid_equal(&agf->agf_uuid, &mp->m_sb.sb_meta_uuid))
+	if (xfs_sb_version_hascrc(&mp->m_sb)) {
+		if (!uuid_equal(&agf->agf_uuid, &mp->m_sb.sb_meta_uuid))
 			return false;
+		if (!xfs_log_check_lsn(mp,
+				be64_to_cpu(XFS_BUF_TO_AGF(bp)->agf_lsn)))
+			return false;
+	}
 
 	if (!(agf->agf_magicnum == cpu_to_be32(XFS_AGF_MAGIC) &&
 	      XFS_AGF_GOOD_VERSION(be32_to_cpu(agf->agf_versionnum)) &&
diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
index ff06557..f949818 100644
--- a/fs/xfs/libxfs/xfs_attr.c
+++ b/fs/xfs/libxfs/xfs_attr.c
@@ -125,7 +125,7 @@
 	uint			lock_mode;
 	int			error;
 
-	XFS_STATS_INC(xs_attr_get);
+	XFS_STATS_INC(ip->i_mount, xs_attr_get);
 
 	if (XFS_FORCED_SHUTDOWN(ip->i_mount))
 		return -EIO;
@@ -209,7 +209,7 @@
 	int			rsvd = (flags & ATTR_ROOT) != 0;
 	int			error, err2, committed, local;
 
-	XFS_STATS_INC(xs_attr_set);
+	XFS_STATS_INC(mp, xs_attr_set);
 
 	if (XFS_FORCED_SHUTDOWN(dp->i_mount))
 		return -EIO;
@@ -412,7 +412,7 @@
 	xfs_fsblock_t		firstblock;
 	int			error;
 
-	XFS_STATS_INC(xs_attr_remove);
+	XFS_STATS_INC(mp, xs_attr_remove);
 
 	if (XFS_FORCED_SHUTDOWN(dp->i_mount))
 		return -EIO;
diff --git a/fs/xfs/libxfs/xfs_attr_leaf.c b/fs/xfs/libxfs/xfs_attr_leaf.c
index 33df52d..aa187f7 100644
--- a/fs/xfs/libxfs/xfs_attr_leaf.c
+++ b/fs/xfs/libxfs/xfs_attr_leaf.c
@@ -41,6 +41,7 @@
 #include "xfs_buf_item.h"
 #include "xfs_cksum.h"
 #include "xfs_dir2.h"
+#include "xfs_log.h"
 
 
 /*
@@ -266,6 +267,8 @@
 			return false;
 		if (be64_to_cpu(hdr3->info.blkno) != bp->b_bn)
 			return false;
+		if (!xfs_log_check_lsn(mp, be64_to_cpu(hdr3->info.lsn)))
+			return false;
 	} else {
 		if (ichdr.magic != XFS_ATTR_LEAF_MAGIC)
 			return false;
diff --git a/fs/xfs/libxfs/xfs_attr_remote.c b/fs/xfs/libxfs/xfs_attr_remote.c
index f38f9bd..5ab95ff 100644
--- a/fs/xfs/libxfs/xfs_attr_remote.c
+++ b/fs/xfs/libxfs/xfs_attr_remote.c
@@ -107,7 +107,7 @@
 	if (be32_to_cpu(rmt->rm_bytes) > fsbsize - sizeof(*rmt))
 		return false;
 	if (be32_to_cpu(rmt->rm_offset) +
-				be32_to_cpu(rmt->rm_bytes) > XATTR_SIZE_MAX)
+				be32_to_cpu(rmt->rm_bytes) > XFS_XATTR_SIZE_MAX)
 		return false;
 	if (rmt->rm_owner == 0)
 		return false;
diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c
index 9390b7c..119c242 100644
--- a/fs/xfs/libxfs/xfs_bmap.c
+++ b/fs/xfs/libxfs/xfs_bmap.c
@@ -948,14 +948,16 @@
 	bp = xfs_btree_get_bufl(args.mp, tp, args.fsbno, 0);
 
 	/*
-	 * Initialise the block and copy the data
+	 * Initialize the block, copy the data and log the remote buffer.
 	 *
-	 * Note: init_fn must set the buffer log item type correctly!
+	 * The callout is responsible for logging because the remote format
+	 * might differ from the local format and thus we don't know how much to
+	 * log here. Note that init_fn must also set the buffer log item type
+	 * correctly.
 	 */
 	init_fn(tp, bp, ip, ifp);
 
-	/* account for the change in fork size and log everything */
-	xfs_trans_log_buf(tp, bp, 0, ifp->if_bytes - 1);
+	/* account for the change in fork size */
 	xfs_idata_realloc(ip, -ifp->if_bytes, whichfork);
 	xfs_bmap_local_to_extents_empty(ip, whichfork);
 	flags |= XFS_ILOG_CORE;
@@ -1435,7 +1437,7 @@
 	xfs_ifork_t	*ifp;		/* inode fork pointer */
 	xfs_bmbt_rec_host_t  *ep;            /* extent record pointer */
 
-	XFS_STATS_INC(xs_look_exlist);
+	XFS_STATS_INC(ip->i_mount, xs_look_exlist);
 	ifp = XFS_IFORK_PTR(ip, fork);
 
 	ep = xfs_bmap_search_multi_extents(ifp, bno, eofp, lastxp, gotp, prevp);
@@ -1732,7 +1734,7 @@
 	ASSERT(!bma->cur ||
 	       (bma->cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL));
 
-	XFS_STATS_INC(xs_add_exlist);
+	XFS_STATS_INC(mp, xs_add_exlist);
 
 #define	LEFT		r[0]
 #define	RIGHT		r[1]
@@ -2286,7 +2288,7 @@
 	ASSERT(*idx <= ifp->if_bytes / sizeof(struct xfs_bmbt_rec));
 	ASSERT(!isnullstartblock(new->br_startblock));
 
-	XFS_STATS_INC(xs_add_exlist);
+	XFS_STATS_INC(mp, xs_add_exlist);
 
 #define	LEFT		r[0]
 #define	RIGHT		r[1]
@@ -2946,7 +2948,7 @@
 	ASSERT(!bma->cur ||
 	       !(bma->cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL));
 
-	XFS_STATS_INC(xs_add_exlist);
+	XFS_STATS_INC(mp, xs_add_exlist);
 
 	state = 0;
 	if (whichfork == XFS_ATTR_FORK)
@@ -4041,7 +4043,7 @@
 	if (XFS_FORCED_SHUTDOWN(mp))
 		return -EIO;
 
-	XFS_STATS_INC(xs_blk_mapr);
+	XFS_STATS_INC(mp, xs_blk_mapr);
 
 	ifp = XFS_IFORK_PTR(ip, whichfork);
 
@@ -4226,7 +4228,7 @@
 	if (XFS_FORCED_SHUTDOWN(mp))
 		return -EIO;
 
-	XFS_STATS_INC(xs_blk_mapw);
+	XFS_STATS_INC(mp, xs_blk_mapw);
 
 	if (!(ifp->if_flags & XFS_IFEXTENTS)) {
 		error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK);
@@ -4556,7 +4558,7 @@
 
 	ifp = XFS_IFORK_PTR(ip, whichfork);
 
-	XFS_STATS_INC(xs_blk_mapw);
+	XFS_STATS_INC(mp, xs_blk_mapw);
 
 	if (*firstblock == NULLFSBLOCK) {
 		if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE)
@@ -4749,12 +4751,12 @@
 	xfs_filblks_t		temp2;	/* for indirect length calculations */
 	int			state = 0;
 
-	XFS_STATS_INC(xs_del_exlist);
+	mp = ip->i_mount;
+	XFS_STATS_INC(mp, xs_del_exlist);
 
 	if (whichfork == XFS_ATTR_FORK)
 		state |= BMAP_ATTRFORK;
 
-	mp = ip->i_mount;
 	ifp = XFS_IFORK_PTR(ip, whichfork);
 	ASSERT((*idx >= 0) && (*idx < ifp->if_bytes /
 		(uint)sizeof(xfs_bmbt_rec_t)));
@@ -5101,7 +5103,7 @@
 		*done = 1;
 		return 0;
 	}
-	XFS_STATS_INC(xs_blk_unmap);
+	XFS_STATS_INC(mp, xs_blk_unmap);
 	isrt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip);
 	start = bno;
 	bno = start + len - 1;
diff --git a/fs/xfs/libxfs/xfs_btree.c b/fs/xfs/libxfs/xfs_btree.c
index f7d7ee7..af1bbee 100644
--- a/fs/xfs/libxfs/xfs_btree.c
+++ b/fs/xfs/libxfs/xfs_btree.c
@@ -32,6 +32,7 @@
 #include "xfs_trace.h"
 #include "xfs_cksum.h"
 #include "xfs_alloc.h"
+#include "xfs_log.h"
 
 /*
  * Cursor allocation zone.
@@ -222,7 +223,7 @@
  * long-form btree header.
  *
  * Prior to calculting the CRC, pull the LSN out of the buffer log item and put
- * it into the buffer so recovery knows what the last modifcation was that made
+ * it into the buffer so recovery knows what the last modification was that made
  * it to disk.
  */
 void
@@ -243,8 +244,14 @@
 xfs_btree_lblock_verify_crc(
 	struct xfs_buf		*bp)
 {
-	if (xfs_sb_version_hascrc(&bp->b_target->bt_mount->m_sb))
+	struct xfs_btree_block	*block = XFS_BUF_TO_BLOCK(bp);
+	struct xfs_mount	*mp = bp->b_target->bt_mount;
+
+	if (xfs_sb_version_hascrc(&mp->m_sb)) {
+		if (!xfs_log_check_lsn(mp, be64_to_cpu(block->bb_u.l.bb_lsn)))
+			return false;
 		return xfs_buf_verify_cksum(bp, XFS_BTREE_LBLOCK_CRC_OFF);
+	}
 
 	return true;
 }
@@ -254,7 +261,7 @@
  * short-form btree header.
  *
  * Prior to calculting the CRC, pull the LSN out of the buffer log item and put
- * it into the buffer so recovery knows what the last modifcation was that made
+ * it into the buffer so recovery knows what the last modification was that made
  * it to disk.
  */
 void
@@ -275,8 +282,14 @@
 xfs_btree_sblock_verify_crc(
 	struct xfs_buf		*bp)
 {
-	if (xfs_sb_version_hascrc(&bp->b_target->bt_mount->m_sb))
+	struct xfs_btree_block  *block = XFS_BUF_TO_BLOCK(bp);
+	struct xfs_mount	*mp = bp->b_target->bt_mount;
+
+	if (xfs_sb_version_hascrc(&mp->m_sb)) {
+		if (!xfs_log_check_lsn(mp, be64_to_cpu(block->bb_u.s.bb_lsn)))
+			return false;
 		return xfs_buf_verify_cksum(bp, XFS_BTREE_SBLOCK_CRC_OFF);
+	}
 
 	return true;
 }
diff --git a/fs/xfs/libxfs/xfs_btree.h b/fs/xfs/libxfs/xfs_btree.h
index 8f18bab..992dec0 100644
--- a/fs/xfs/libxfs/xfs_btree.h
+++ b/fs/xfs/libxfs/xfs_btree.h
@@ -84,31 +84,38 @@
 /*
  * Generic stats interface
  */
-#define __XFS_BTREE_STATS_INC(type, stat) \
-	XFS_STATS_INC(xs_ ## type ## _2_ ## stat)
-#define XFS_BTREE_STATS_INC(cur, stat)  \
+#define __XFS_BTREE_STATS_INC(mp, type, stat) \
+	XFS_STATS_INC(mp, xs_ ## type ## _2_ ## stat)
+#define XFS_BTREE_STATS_INC(cur, stat)	\
 do {    \
+	struct xfs_mount *__mp = cur->bc_mp; \
 	switch (cur->bc_btnum) {  \
-	case XFS_BTNUM_BNO: __XFS_BTREE_STATS_INC(abtb, stat); break;	\
-	case XFS_BTNUM_CNT: __XFS_BTREE_STATS_INC(abtc, stat); break;	\
-	case XFS_BTNUM_BMAP: __XFS_BTREE_STATS_INC(bmbt, stat); break;	\
-	case XFS_BTNUM_INO: __XFS_BTREE_STATS_INC(ibt, stat); break;	\
-	case XFS_BTNUM_FINO: __XFS_BTREE_STATS_INC(fibt, stat); break;	\
+	case XFS_BTNUM_BNO: __XFS_BTREE_STATS_INC(__mp, abtb, stat); break; \
+	case XFS_BTNUM_CNT: __XFS_BTREE_STATS_INC(__mp, abtc, stat); break; \
+	case XFS_BTNUM_BMAP: __XFS_BTREE_STATS_INC(__mp, bmbt, stat); break; \
+	case XFS_BTNUM_INO: __XFS_BTREE_STATS_INC(__mp, ibt, stat); break; \
+	case XFS_BTNUM_FINO: __XFS_BTREE_STATS_INC(__mp, fibt, stat); break; \
 	case XFS_BTNUM_MAX: ASSERT(0); /* fucking gcc */ ; break;	\
 	}       \
 } while (0)
 
-#define __XFS_BTREE_STATS_ADD(type, stat, val) \
-	XFS_STATS_ADD(xs_ ## type ## _2_ ## stat, val)
+#define __XFS_BTREE_STATS_ADD(mp, type, stat, val) \
+	XFS_STATS_ADD(mp, xs_ ## type ## _2_ ## stat, val)
 #define XFS_BTREE_STATS_ADD(cur, stat, val)  \
 do {    \
+	struct xfs_mount *__mp = cur->bc_mp; \
 	switch (cur->bc_btnum) {  \
-	case XFS_BTNUM_BNO: __XFS_BTREE_STATS_ADD(abtb, stat, val); break; \
-	case XFS_BTNUM_CNT: __XFS_BTREE_STATS_ADD(abtc, stat, val); break; \
-	case XFS_BTNUM_BMAP: __XFS_BTREE_STATS_ADD(bmbt, stat, val); break; \
-	case XFS_BTNUM_INO: __XFS_BTREE_STATS_ADD(ibt, stat, val); break; \
-	case XFS_BTNUM_FINO: __XFS_BTREE_STATS_ADD(fibt, stat, val); break; \
-	case XFS_BTNUM_MAX: ASSERT(0); /* fucking gcc */ ; break;	\
+	case XFS_BTNUM_BNO:	\
+		__XFS_BTREE_STATS_ADD(__mp, abtb, stat, val); break; \
+	case XFS_BTNUM_CNT:	\
+		__XFS_BTREE_STATS_ADD(__mp, abtc, stat, val); break; \
+	case XFS_BTNUM_BMAP:	\
+		__XFS_BTREE_STATS_ADD(__mp, bmbt, stat, val); break; \
+	case XFS_BTNUM_INO:	\
+		__XFS_BTREE_STATS_ADD(__mp, ibt, stat, val); break; \
+	case XFS_BTNUM_FINO:	\
+		__XFS_BTREE_STATS_ADD(__mp, fibt, stat, val); break; \
+	case XFS_BTNUM_MAX: ASSERT(0); /* fucking gcc */ ; break; \
 	}       \
 } while (0)
 
diff --git a/fs/xfs/libxfs/xfs_da_btree.c b/fs/xfs/libxfs/xfs_da_btree.c
index be43248..e89a0f8f 100644
--- a/fs/xfs/libxfs/xfs_da_btree.c
+++ b/fs/xfs/libxfs/xfs_da_btree.c
@@ -39,6 +39,7 @@
 #include "xfs_trace.h"
 #include "xfs_cksum.h"
 #include "xfs_buf_item.h"
+#include "xfs_log.h"
 
 /*
  * xfs_da_btree.c
@@ -150,6 +151,8 @@
 			return false;
 		if (be64_to_cpu(hdr3->info.blkno) != bp->b_bn)
 			return false;
+		if (!xfs_log_check_lsn(mp, be64_to_cpu(hdr3->info.lsn)))
+			return false;
 	} else {
 		if (ichdr.magic != XFS_DA_NODE_MAGIC)
 			return false;
@@ -322,6 +325,7 @@
 	if (xfs_sb_version_hascrc(&mp->m_sb)) {
 		struct xfs_da3_node_hdr *hdr3 = bp->b_addr;
 
+		memset(hdr3, 0, sizeof(struct xfs_da3_node_hdr));
 		ichdr.magic = XFS_DA3_NODE_MAGIC;
 		hdr3->info.blkno = cpu_to_be64(bp->b_bn);
 		hdr3->info.owner = cpu_to_be64(args->dp->i_ino);
diff --git a/fs/xfs/libxfs/xfs_dir2.c b/fs/xfs/libxfs/xfs_dir2.c
index 9de401d..2fb53a5 100644
--- a/fs/xfs/libxfs/xfs_dir2.c
+++ b/fs/xfs/libxfs/xfs_dir2.c
@@ -271,7 +271,7 @@
 		rval = xfs_dir_ino_validate(tp->t_mountp, inum);
 		if (rval)
 			return rval;
-		XFS_STATS_INC(xs_dir_create);
+		XFS_STATS_INC(dp->i_mount, xs_dir_create);
 	}
 
 	args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS);
@@ -365,7 +365,7 @@
 	int		lock_mode;
 
 	ASSERT(S_ISDIR(dp->i_d.di_mode));
-	XFS_STATS_INC(xs_dir_lookup);
+	XFS_STATS_INC(dp->i_mount, xs_dir_lookup);
 
 	/*
 	 * We need to use KM_NOFS here so that lockdep will not throw false
@@ -444,7 +444,7 @@
 	int		v;		/* type-checking value */
 
 	ASSERT(S_ISDIR(dp->i_d.di_mode));
-	XFS_STATS_INC(xs_dir_remove);
+	XFS_STATS_INC(dp->i_mount, xs_dir_remove);
 
 	args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS);
 	if (!args)
diff --git a/fs/xfs/libxfs/xfs_dir2_block.c b/fs/xfs/libxfs/xfs_dir2_block.c
index 4778d1d..9c10e2b 100644
--- a/fs/xfs/libxfs/xfs_dir2_block.c
+++ b/fs/xfs/libxfs/xfs_dir2_block.c
@@ -34,6 +34,7 @@
 #include "xfs_error.h"
 #include "xfs_trace.h"
 #include "xfs_cksum.h"
+#include "xfs_log.h"
 
 /*
  * Local function prototypes.
@@ -71,6 +72,8 @@
 			return false;
 		if (be64_to_cpu(hdr3->blkno) != bp->b_bn)
 			return false;
+		if (!xfs_log_check_lsn(mp, be64_to_cpu(hdr3->lsn)))
+			return false;
 	} else {
 		if (hdr3->magic != cpu_to_be32(XFS_DIR2_BLOCK_MAGIC))
 			return false;
diff --git a/fs/xfs/libxfs/xfs_dir2_data.c b/fs/xfs/libxfs/xfs_dir2_data.c
index 824131e..af71a84f 100644
--- a/fs/xfs/libxfs/xfs_dir2_data.c
+++ b/fs/xfs/libxfs/xfs_dir2_data.c
@@ -31,6 +31,7 @@
 #include "xfs_trans.h"
 #include "xfs_buf_item.h"
 #include "xfs_cksum.h"
+#include "xfs_log.h"
 
 /*
  * Check the consistency of the data block.
@@ -224,6 +225,8 @@
 			return false;
 		if (be64_to_cpu(hdr3->blkno) != bp->b_bn)
 			return false;
+		if (!xfs_log_check_lsn(mp, be64_to_cpu(hdr3->lsn)))
+			return false;
 	} else {
 		if (hdr3->magic != cpu_to_be32(XFS_DIR2_DATA_MAGIC))
 			return false;
diff --git a/fs/xfs/libxfs/xfs_dir2_leaf.c b/fs/xfs/libxfs/xfs_dir2_leaf.c
index f300240..3923e1f 100644
--- a/fs/xfs/libxfs/xfs_dir2_leaf.c
+++ b/fs/xfs/libxfs/xfs_dir2_leaf.c
@@ -33,6 +33,7 @@
 #include "xfs_trans.h"
 #include "xfs_buf_item.h"
 #include "xfs_cksum.h"
+#include "xfs_log.h"
 
 /*
  * Local function declarations.
@@ -164,6 +165,8 @@
 			return false;
 		if (be64_to_cpu(leaf3->info.blkno) != bp->b_bn)
 			return false;
+		if (!xfs_log_check_lsn(mp, be64_to_cpu(leaf3->info.lsn)))
+			return false;
 	} else {
 		if (leaf->hdr.info.magic != cpu_to_be16(magic))
 			return false;
diff --git a/fs/xfs/libxfs/xfs_dir2_node.c b/fs/xfs/libxfs/xfs_dir2_node.c
index cc28e92..70b0cb2 100644
--- a/fs/xfs/libxfs/xfs_dir2_node.c
+++ b/fs/xfs/libxfs/xfs_dir2_node.c
@@ -33,6 +33,7 @@
 #include "xfs_trans.h"
 #include "xfs_buf_item.h"
 #include "xfs_cksum.h"
+#include "xfs_log.h"
 
 /*
  * Function declarations.
@@ -97,6 +98,8 @@
 			return false;
 		if (be64_to_cpu(hdr3->blkno) != bp->b_bn)
 			return false;
+		if (!xfs_log_check_lsn(mp, be64_to_cpu(hdr3->lsn)))
+			return false;
 	} else {
 		if (hdr->magic != cpu_to_be32(XFS_DIR2_FREE_MAGIC))
 			return false;
diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h
index 9590a06..8774498 100644
--- a/fs/xfs/libxfs/xfs_format.h
+++ b/fs/xfs/libxfs/xfs_format.h
@@ -60,6 +60,14 @@
 #define	XFS_SB_VERSION_MOREBITSBIT	0x8000
 
 /*
+ * The size of a single extended attribute on disk is limited by
+ * the size of index values within the attribute entries themselves.
+ * These are be16 fields, so we can only support attribute data
+ * sizes up to 2^16 bytes in length.
+ */
+#define XFS_XATTR_SIZE_MAX (1 << 16)
+
+/*
  * Supported feature bit list is just all bits in the versionnum field because
  * we've used them all up and understand them all. Except, of course, for the
  * shared superblock bit, which nobody knows what it does and so is unsupported.
@@ -1483,13 +1491,17 @@
  */
 #define XFS_ACL_MAX_ENTRIES(mp)	\
 	(xfs_sb_version_hascrc(&mp->m_sb) \
-		?  (XATTR_SIZE_MAX - sizeof(struct xfs_acl)) / \
+		?  (XFS_XATTR_SIZE_MAX - sizeof(struct xfs_acl)) / \
 						sizeof(struct xfs_acl_entry) \
 		: 25)
 
-#define XFS_ACL_MAX_SIZE(mp) \
+#define XFS_ACL_SIZE(cnt) \
 	(sizeof(struct xfs_acl) + \
-		sizeof(struct xfs_acl_entry) * XFS_ACL_MAX_ENTRIES((mp)))
+		sizeof(struct xfs_acl_entry) * cnt)
+
+#define XFS_ACL_MAX_SIZE(mp) \
+	XFS_ACL_SIZE(XFS_ACL_MAX_ENTRIES((mp)))
+
 
 /* On-disk XFS extended attribute names */
 #define SGI_ACL_FILE		"SGI_ACL_FILE"
diff --git a/fs/xfs/libxfs/xfs_fs.h b/fs/xfs/libxfs/xfs_fs.h
index 89689c6..b2b73a9 100644
--- a/fs/xfs/libxfs/xfs_fs.h
+++ b/fs/xfs/libxfs/xfs_fs.h
@@ -490,6 +490,16 @@
 #define XFS_FSOP_GOING_FLAGS_NOLOGFLUSH		0x2	/* don't flush log nor data */
 
 /*
+ * ioctl limits
+ */
+#ifdef XATTR_LIST_MAX
+#  define XFS_XATTR_LIST_MAX XATTR_LIST_MAX
+#else
+#  define XFS_XATTR_LIST_MAX 65536
+#endif
+
+
+/*
  * ioctl commands that are used by Linux filesystems
  */
 #define XFS_IOC_GETXFLAGS	FS_IOC_GETFLAGS
diff --git a/fs/xfs/libxfs/xfs_ialloc.c b/fs/xfs/libxfs/xfs_ialloc.c
index 54deb2d..70c1db9 100644
--- a/fs/xfs/libxfs/xfs_ialloc.c
+++ b/fs/xfs/libxfs/xfs_ialloc.c
@@ -38,6 +38,7 @@
 #include "xfs_icreate_item.h"
 #include "xfs_icache.h"
 #include "xfs_trace.h"
+#include "xfs_log.h"
 
 
 /*
@@ -2500,9 +2501,14 @@
 	struct xfs_mount *mp = bp->b_target->bt_mount;
 	struct xfs_agi	*agi = XFS_BUF_TO_AGI(bp);
 
-	if (xfs_sb_version_hascrc(&mp->m_sb) &&
-	    !uuid_equal(&agi->agi_uuid, &mp->m_sb.sb_meta_uuid))
+	if (xfs_sb_version_hascrc(&mp->m_sb)) {
+		if (!uuid_equal(&agi->agi_uuid, &mp->m_sb.sb_meta_uuid))
 			return false;
+		if (!xfs_log_check_lsn(mp,
+				be64_to_cpu(XFS_BUF_TO_AGI(bp)->agi_lsn)))
+			return false;
+	}
+
 	/*
 	 * Validate the magic number of the agi block.
 	 */
diff --git a/fs/xfs/libxfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c
index 4742514..a0b071d 100644
--- a/fs/xfs/libxfs/xfs_sb.c
+++ b/fs/xfs/libxfs/xfs_sb.c
@@ -35,6 +35,7 @@
 #include "xfs_bmap_btree.h"
 #include "xfs_alloc_btree.h"
 #include "xfs_ialloc_btree.h"
+#include "xfs_log.h"
 
 /*
  * Physical superblock buffer manipulations. Shared with libxfs in userspace.
@@ -163,6 +164,15 @@
 "Filesystem can not be safely mounted by this kernel.");
 			return -EINVAL;
 		}
+	} else if (xfs_sb_version_hascrc(sbp)) {
+		/*
+		 * We can't read verify the sb LSN because the read verifier is
+		 * called before the log is allocated and processed. We know the
+		 * log is set up before write verifier (!check_version) calls,
+		 * so just check it here.
+		 */
+		if (!xfs_log_check_lsn(mp, sbp->sb_lsn))
+			return -EFSCORRUPTED;
 	}
 
 	if (xfs_sb_version_has_pquotino(sbp)) {
diff --git a/fs/xfs/libxfs/xfs_symlink_remote.c b/fs/xfs/libxfs/xfs_symlink_remote.c
index 8f8af05..cb6fd20 100644
--- a/fs/xfs/libxfs/xfs_symlink_remote.c
+++ b/fs/xfs/libxfs/xfs_symlink_remote.c
@@ -31,6 +31,7 @@
 #include "xfs_cksum.h"
 #include "xfs_trans.h"
 #include "xfs_buf_item.h"
+#include "xfs_log.h"
 
 
 /*
@@ -60,6 +61,7 @@
 	if (!xfs_sb_version_hascrc(&mp->m_sb))
 		return 0;
 
+	memset(dsl, 0, sizeof(struct xfs_dsymlink_hdr));
 	dsl->sl_magic = cpu_to_be32(XFS_SYMLINK_MAGIC);
 	dsl->sl_offset = cpu_to_be32(offset);
 	dsl->sl_bytes = cpu_to_be32(size);
@@ -116,6 +118,8 @@
 		return false;
 	if (dsl->sl_owner == 0)
 		return false;
+	if (!xfs_log_check_lsn(mp, be64_to_cpu(dsl->sl_lsn)))
+		return false;
 
 	return true;
 }
@@ -183,6 +187,7 @@
 	if (!xfs_sb_version_hascrc(&mp->m_sb)) {
 		bp->b_ops = NULL;
 		memcpy(bp->b_addr, ifp->if_u1.if_data, ifp->if_bytes);
+		xfs_trans_log_buf(tp, bp, 0, ifp->if_bytes - 1);
 		return;
 	}
 
@@ -198,4 +203,6 @@
 	buf = bp->b_addr;
 	buf += xfs_symlink_hdr_set(mp, ip->i_ino, 0, ifp->if_bytes, bp);
 	memcpy(buf, ifp->if_u1.if_data, ifp->if_bytes);
+	xfs_trans_log_buf(tp, bp, 0, sizeof(struct xfs_dsymlink_hdr) +
+					ifp->if_bytes - 1);
 }
diff --git a/fs/xfs/xfs_acl.c b/fs/xfs/xfs_acl.c
index 4b64167..763e365 100644
--- a/fs/xfs/xfs_acl.c
+++ b/fs/xfs/xfs_acl.c
@@ -37,16 +37,19 @@
 
 STATIC struct posix_acl *
 xfs_acl_from_disk(
-	struct xfs_acl	*aclp,
-	int		max_entries)
+	const struct xfs_acl	*aclp,
+	int			len,
+	int			max_entries)
 {
 	struct posix_acl_entry *acl_e;
 	struct posix_acl *acl;
-	struct xfs_acl_entry *ace;
+	const struct xfs_acl_entry *ace;
 	unsigned int count, i;
 
+	if (len < sizeof(*aclp))
+		return ERR_PTR(-EFSCORRUPTED);
 	count = be32_to_cpu(aclp->acl_cnt);
-	if (count > max_entries)
+	if (count > max_entries || XFS_ACL_SIZE(count) != len)
 		return ERR_PTR(-EFSCORRUPTED);
 
 	acl = posix_acl_alloc(count, GFP_KERNEL);
@@ -163,7 +166,7 @@
 		goto out;
 	}
 
-	acl = xfs_acl_from_disk(xfs_acl, XFS_ACL_MAX_ENTRIES(ip->i_mount));
+	acl = xfs_acl_from_disk(xfs_acl, len, XFS_ACL_MAX_ENTRIES(ip->i_mount));
 	if (IS_ERR(acl))
 		goto out;
 
diff --git a/fs/xfs/xfs_acl.h b/fs/xfs/xfs_acl.h
index 3841b07..75af0a4 100644
--- a/fs/xfs/xfs_acl.h
+++ b/fs/xfs/xfs_acl.h
@@ -36,4 +36,7 @@
 # define posix_acl_access_exists(inode)			0
 # define posix_acl_default_exists(inode)		0
 #endif /* CONFIG_XFS_POSIX_ACL */
+
+extern void xfs_forget_acl(struct inode *inode, const char *name, int xflags);
+
 #endif	/* __XFS_ACL_H__ */
diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
index 69c2dbc..29e7e5d 100644
--- a/fs/xfs/xfs_aops.c
+++ b/fs/xfs/xfs_aops.c
@@ -172,6 +172,12 @@
 	current_set_flags_nested(&tp->t_pflags, PF_FSTRANS);
 	__sb_writers_acquired(VFS_I(ip)->i_sb, SB_FREEZE_FS);
 
+	/* we abort the update if there was an IO error */
+	if (ioend->io_error) {
+		xfs_trans_cancel(tp);
+		return ioend->io_error;
+	}
+
 	return xfs_setfilesize(ip, tp, ioend->io_offset, ioend->io_size);
 }
 
@@ -212,14 +218,17 @@
 		ioend->io_error = -EIO;
 		goto done;
 	}
-	if (ioend->io_error)
-		goto done;
 
 	/*
 	 * For unwritten extents we need to issue transactions to convert a
 	 * range to normal written extens after the data I/O has finished.
+	 * Detecting and handling completion IO errors is done individually
+	 * for each case as different cleanup operations need to be performed
+	 * on error.
 	 */
 	if (ioend->io_type == XFS_IO_UNWRITTEN) {
+		if (ioend->io_error)
+			goto done;
 		error = xfs_iomap_write_unwritten(ip, ioend->io_offset,
 						  ioend->io_size);
 	} else if (ioend->io_append_trans) {
@@ -1425,12 +1434,12 @@
 	     (IS_DAX(inode) && ISUNWRITTEN(&imap)))) {
 		if (direct || xfs_get_extsz_hint(ip)) {
 			/*
-			 * Drop the ilock in preparation for starting the block
-			 * allocation transaction.  It will be retaken
-			 * exclusively inside xfs_iomap_write_direct for the
-			 * actual allocation.
+			 * xfs_iomap_write_direct() expects the shared lock. It
+			 * is unlocked on return.
 			 */
-			xfs_iunlock(ip, lockmode);
+			if (lockmode == XFS_ILOCK_EXCL)
+				xfs_ilock_demote(ip, lockmode);
+
 			error = xfs_iomap_write_direct(ip, offset, size,
 						       &imap, nimaps);
 			if (error)
diff --git a/fs/xfs/xfs_attr_list.c b/fs/xfs/xfs_attr_list.c
index 65fb37a..0ef7c2e 100644
--- a/fs/xfs/xfs_attr_list.c
+++ b/fs/xfs/xfs_attr_list.c
@@ -511,7 +511,7 @@
 	xfs_inode_t *dp = context->dp;
 	uint		lock_mode;
 
-	XFS_STATS_INC(xs_attr_list);
+	XFS_STATS_INC(dp->i_mount, xs_attr_list);
 
 	if (XFS_FORCED_SHUTDOWN(dp->i_mount))
 		return -EIO;
diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c
index 3f59698..dbae649 100644
--- a/fs/xfs/xfs_bmap_util.c
+++ b/fs/xfs/xfs_bmap_util.c
@@ -1063,7 +1063,7 @@
 		xfs_bmap_init(&free_list, &firstfsb);
 		error = xfs_bmapi_write(tp, ip, startoffset_fsb,
 					allocatesize_fsb, alloc_type, &firstfsb,
-					0, imapp, &nimaps, &free_list);
+					resblks, imapp, &nimaps, &free_list);
 		if (error) {
 			goto error0;
 		}
diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index 8ecffb3..3243cdf 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -201,7 +201,7 @@
 	atomic_set(&bp->b_pin_count, 0);
 	init_waitqueue_head(&bp->b_waiters);
 
-	XFS_STATS_INC(xb_create);
+	XFS_STATS_INC(target->bt_mount, xb_create);
 	trace_xfs_buf_init(bp, _RET_IP_);
 
 	return bp;
@@ -354,15 +354,16 @@
 			 */
 			if (!(++retries % 100))
 				xfs_err(NULL,
-		"possible memory allocation deadlock in %s (mode:0x%x)",
+		"%s(%u) possible memory allocation deadlock in %s (mode:0x%x)",
+					current->comm, current->pid,
 					__func__, gfp_mask);
 
-			XFS_STATS_INC(xb_page_retries);
+			XFS_STATS_INC(bp->b_target->bt_mount, xb_page_retries);
 			congestion_wait(BLK_RW_ASYNC, HZ/50);
 			goto retry;
 		}
 
-		XFS_STATS_INC(xb_page_found);
+		XFS_STATS_INC(bp->b_target->bt_mount, xb_page_found);
 
 		nbytes = min_t(size_t, size, PAGE_SIZE - offset);
 		size -= nbytes;
@@ -516,7 +517,7 @@
 		new_bp->b_pag = pag;
 		spin_unlock(&pag->pag_buf_lock);
 	} else {
-		XFS_STATS_INC(xb_miss_locked);
+		XFS_STATS_INC(btp->bt_mount, xb_miss_locked);
 		spin_unlock(&pag->pag_buf_lock);
 		xfs_perag_put(pag);
 	}
@@ -529,11 +530,11 @@
 	if (!xfs_buf_trylock(bp)) {
 		if (flags & XBF_TRYLOCK) {
 			xfs_buf_rele(bp);
-			XFS_STATS_INC(xb_busy_locked);
+			XFS_STATS_INC(btp->bt_mount, xb_busy_locked);
 			return NULL;
 		}
 		xfs_buf_lock(bp);
-		XFS_STATS_INC(xb_get_locked_waited);
+		XFS_STATS_INC(btp->bt_mount, xb_get_locked_waited);
 	}
 
 	/*
@@ -549,7 +550,7 @@
 	}
 
 	trace_xfs_buf_find(bp, flags, _RET_IP_);
-	XFS_STATS_INC(xb_get_locked);
+	XFS_STATS_INC(btp->bt_mount, xb_get_locked);
 	return bp;
 }
 
@@ -603,7 +604,7 @@
 		}
 	}
 
-	XFS_STATS_INC(xb_get);
+	XFS_STATS_INC(target->bt_mount, xb_get);
 	trace_xfs_buf_get(bp, flags, _RET_IP_);
 	return bp;
 }
@@ -643,7 +644,7 @@
 		trace_xfs_buf_read(bp, flags, _RET_IP_);
 
 		if (!XFS_BUF_ISDONE(bp)) {
-			XFS_STATS_INC(xb_get_read);
+			XFS_STATS_INC(target->bt_mount, xb_get_read);
 			bp->b_ops = ops;
 			_xfs_buf_read(bp, flags);
 		} else if (flags & XBF_ASYNC) {
diff --git a/fs/xfs/xfs_dir2_readdir.c b/fs/xfs/xfs_dir2_readdir.c
index a989a9c..642d55d 100644
--- a/fs/xfs/xfs_dir2_readdir.c
+++ b/fs/xfs/xfs_dir2_readdir.c
@@ -666,7 +666,7 @@
 		return -EIO;
 
 	ASSERT(S_ISDIR(dp->i_d.di_mode));
-	XFS_STATS_INC(xs_dir_getdents);
+	XFS_STATS_INC(dp->i_mount, xs_dir_getdents);
 
 	args.dp = dp;
 	args.geo = dp->i_mount->m_dir_geo;
diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c
index 30cb3af..7ac6c5c 100644
--- a/fs/xfs/xfs_dquot.c
+++ b/fs/xfs/xfs_dquot.c
@@ -75,9 +75,9 @@
 	ASSERT(list_empty(&dqp->q_lru));
 
 	mutex_destroy(&dqp->q_qlock);
-	kmem_zone_free(xfs_qm_dqzone, dqp);
 
-	XFS_STATS_DEC(xs_qm_dquot);
+	XFS_STATS_DEC(dqp->q_mount, xs_qm_dquot);
+	kmem_zone_free(xfs_qm_dqzone, dqp);
 }
 
 /*
@@ -605,7 +605,7 @@
 		break;
 	}
 
-	XFS_STATS_INC(xs_qm_dquot);
+	XFS_STATS_INC(mp, xs_qm_dquot);
 
 	trace_xfs_dqread(dqp);
 
@@ -747,12 +747,12 @@
 		mutex_unlock(&qi->qi_tree_lock);
 
 		trace_xfs_dqget_hit(dqp);
-		XFS_STATS_INC(xs_qm_dqcachehits);
+		XFS_STATS_INC(mp, xs_qm_dqcachehits);
 		*O_dqpp = dqp;
 		return 0;
 	}
 	mutex_unlock(&qi->qi_tree_lock);
-	XFS_STATS_INC(xs_qm_dqcachemisses);
+	XFS_STATS_INC(mp, xs_qm_dqcachemisses);
 
 	/*
 	 * Dquot cache miss. We don't want to keep the inode lock across
@@ -806,7 +806,7 @@
 		mutex_unlock(&qi->qi_tree_lock);
 		trace_xfs_dqget_dup(dqp);
 		xfs_qm_dqdestroy(dqp);
-		XFS_STATS_INC(xs_qm_dquot_dups);
+		XFS_STATS_INC(mp, xs_qm_dquot_dups);
 		goto restart;
 	}
 
@@ -846,7 +846,7 @@
 		trace_xfs_dqput_free(dqp);
 
 		if (list_lru_add(&qi->qi_lru, &dqp->q_lru))
-			XFS_STATS_INC(xs_qm_dquot_unused);
+			XFS_STATS_INC(dqp->q_mount, xs_qm_dquot_unused);
 	}
 	xfs_dqunlock(dqp);
 }
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index ce208e3..39743ef 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -242,19 +242,30 @@
 	}
 
 	/*
-	 * All metadata updates are logged, which means that we just have
-	 * to flush the log up to the latest LSN that touched the inode.
+	 * All metadata updates are logged, which means that we just have to
+	 * flush the log up to the latest LSN that touched the inode. If we have
+	 * concurrent fsync/fdatasync() calls, we need them to all block on the
+	 * log force before we clear the ili_fsync_fields field. This ensures
+	 * that we don't get a racing sync operation that does not wait for the
+	 * metadata to hit the journal before returning. If we race with
+	 * clearing the ili_fsync_fields, then all that will happen is the log
+	 * force will do nothing as the lsn will already be on disk. We can't
+	 * race with setting ili_fsync_fields because that is done under
+	 * XFS_ILOCK_EXCL, and that can't happen because we hold the lock shared
+	 * until after the ili_fsync_fields is cleared.
 	 */
 	xfs_ilock(ip, XFS_ILOCK_SHARED);
 	if (xfs_ipincount(ip)) {
 		if (!datasync ||
-		    (ip->i_itemp->ili_fields & ~XFS_ILOG_TIMESTAMP))
+		    (ip->i_itemp->ili_fsync_fields & ~XFS_ILOG_TIMESTAMP))
 			lsn = ip->i_itemp->ili_last_lsn;
 	}
-	xfs_iunlock(ip, XFS_ILOCK_SHARED);
 
-	if (lsn)
+	if (lsn) {
 		error = _xfs_log_force_lsn(mp, lsn, XFS_LOG_SYNC, &log_flushed);
+		ip->i_itemp->ili_fsync_fields = 0;
+	}
+	xfs_iunlock(ip, XFS_ILOCK_SHARED);
 
 	/*
 	 * If we only have a single device, and the log force about was
@@ -287,7 +298,7 @@
 	xfs_fsize_t		n;
 	loff_t			pos = iocb->ki_pos;
 
-	XFS_STATS_INC(xs_read_calls);
+	XFS_STATS_INC(mp, xs_read_calls);
 
 	if (unlikely(iocb->ki_flags & IOCB_DIRECT))
 		ioflags |= XFS_IO_ISDIRECT;
@@ -365,7 +376,7 @@
 
 	ret = generic_file_read_iter(iocb, to);
 	if (ret > 0)
-		XFS_STATS_ADD(xs_read_bytes, ret);
+		XFS_STATS_ADD(mp, xs_read_bytes, ret);
 
 	xfs_rw_iunlock(ip, XFS_IOLOCK_SHARED);
 	return ret;
@@ -383,7 +394,7 @@
 	int			ioflags = 0;
 	ssize_t			ret;
 
-	XFS_STATS_INC(xs_read_calls);
+	XFS_STATS_INC(ip->i_mount, xs_read_calls);
 
 	if (infilp->f_mode & FMODE_NOCMTIME)
 		ioflags |= XFS_IO_INVIS;
@@ -401,7 +412,7 @@
 	else
 		ret = generic_file_splice_read(infilp, ppos, pipe, count, flags);
 	if (ret > 0)
-		XFS_STATS_ADD(xs_read_bytes, ret);
+		XFS_STATS_ADD(ip->i_mount, xs_read_bytes, ret);
 
 	xfs_rw_iunlock(ip, XFS_IOLOCK_SHARED);
 	return ret;
@@ -482,6 +493,8 @@
 	ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL));
 	ASSERT(offset > isize);
 
+	trace_xfs_zero_eof(ip, isize, offset - isize);
+
 	/*
 	 * First handle zeroing the block on which isize resides.
 	 *
@@ -574,6 +587,7 @@
 	struct xfs_inode	*ip = XFS_I(inode);
 	ssize_t			error = 0;
 	size_t			count = iov_iter_count(from);
+	bool			drained_dio = false;
 
 restart:
 	error = generic_write_checks(iocb, from);
@@ -611,12 +625,13 @@
 		bool	zero = false;
 
 		spin_unlock(&ip->i_flags_lock);
-		if (*iolock == XFS_IOLOCK_SHARED) {
-			xfs_rw_iunlock(ip, *iolock);
-			*iolock = XFS_IOLOCK_EXCL;
-			xfs_rw_ilock(ip, *iolock);
-			iov_iter_reexpand(from, count);
-
+		if (!drained_dio) {
+			if (*iolock == XFS_IOLOCK_SHARED) {
+				xfs_rw_iunlock(ip, *iolock);
+				*iolock = XFS_IOLOCK_EXCL;
+				xfs_rw_ilock(ip, *iolock);
+				iov_iter_reexpand(from, count);
+			}
 			/*
 			 * We now have an IO submission barrier in place, but
 			 * AIO can do EOF updates during IO completion and hence
@@ -626,6 +641,7 @@
 			 * no-op.
 			 */
 			inode_dio_wait(inode);
+			drained_dio = true;
 			goto restart;
 		}
 		error = xfs_zero_eof(ip, iocb->ki_pos, i_size_read(inode), &zero);
@@ -867,7 +883,7 @@
 	ssize_t			ret;
 	size_t			ocount = iov_iter_count(from);
 
-	XFS_STATS_INC(xs_write_calls);
+	XFS_STATS_INC(ip->i_mount, xs_write_calls);
 
 	if (ocount == 0)
 		return 0;
@@ -883,7 +899,7 @@
 	if (ret > 0) {
 		ssize_t err;
 
-		XFS_STATS_ADD(xs_write_bytes, ret);
+		XFS_STATS_ADD(ip->i_mount, xs_write_bytes, ret);
 
 		/* Handle various SYNC-type writes */
 		err = generic_write_sync(file, iocb->ki_pos - ret, ret);
diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c
index 0a326bd..d7a490f 100644
--- a/fs/xfs/xfs_icache.c
+++ b/fs/xfs/xfs_icache.c
@@ -63,7 +63,7 @@
 		return NULL;
 	}
 
-	XFS_STATS_INC(vn_active);
+	XFS_STATS_INC(mp, vn_active);
 	ASSERT(atomic_read(&ip->i_pincount) == 0);
 	ASSERT(!spin_is_locked(&ip->i_flags_lock));
 	ASSERT(!xfs_isiflocked(ip));
@@ -129,7 +129,7 @@
 	/* asserts to verify all state is correct here */
 	ASSERT(atomic_read(&ip->i_pincount) == 0);
 	ASSERT(!xfs_isiflocked(ip));
-	XFS_STATS_DEC(vn_active);
+	XFS_STATS_DEC(ip->i_mount, vn_active);
 
 	call_rcu(&VFS_I(ip)->i_rcu, xfs_inode_free_callback);
 }
@@ -159,7 +159,7 @@
 	spin_lock(&ip->i_flags_lock);
 	if (ip->i_ino != ino) {
 		trace_xfs_iget_skip(ip);
-		XFS_STATS_INC(xs_ig_frecycle);
+		XFS_STATS_INC(mp, xs_ig_frecycle);
 		error = -EAGAIN;
 		goto out_error;
 	}
@@ -177,7 +177,7 @@
 	 */
 	if (ip->i_flags & (XFS_INEW|XFS_IRECLAIM)) {
 		trace_xfs_iget_skip(ip);
-		XFS_STATS_INC(xs_ig_frecycle);
+		XFS_STATS_INC(mp, xs_ig_frecycle);
 		error = -EAGAIN;
 		goto out_error;
 	}
@@ -259,7 +259,7 @@
 		xfs_ilock(ip, lock_flags);
 
 	xfs_iflags_clear(ip, XFS_ISTALE | XFS_IDONTCACHE);
-	XFS_STATS_INC(xs_ig_found);
+	XFS_STATS_INC(mp, xs_ig_found);
 
 	return 0;
 
@@ -342,7 +342,7 @@
 	error = radix_tree_insert(&pag->pag_ici_root, agino, ip);
 	if (unlikely(error)) {
 		WARN_ON(error != -EEXIST);
-		XFS_STATS_INC(xs_ig_dup);
+		XFS_STATS_INC(mp, xs_ig_dup);
 		error = -EAGAIN;
 		goto out_preload_end;
 	}
@@ -412,7 +412,7 @@
 	if (!ino || XFS_INO_TO_AGNO(mp, ino) >= mp->m_sb.sb_agcount)
 		return -EINVAL;
 
-	XFS_STATS_INC(xs_ig_attempts);
+	XFS_STATS_INC(mp, xs_ig_attempts);
 
 	/* get the perag structure and ensure that it's inode capable */
 	pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ino));
@@ -429,7 +429,7 @@
 			goto out_error_or_again;
 	} else {
 		rcu_read_unlock();
-		XFS_STATS_INC(xs_ig_missed);
+		XFS_STATS_INC(mp, xs_ig_missed);
 
 		error = xfs_iget_cache_miss(mp, pag, tp, ino, &ip,
 							flags, lock_flags);
@@ -965,7 +965,7 @@
 	xfs_ifunlock(ip);
 	xfs_iunlock(ip, XFS_ILOCK_EXCL);
 
-	XFS_STATS_INC(xs_ig_reclaims);
+	XFS_STATS_INC(ip->i_mount, xs_ig_reclaims);
 	/*
 	 * Remove the inode from the per-AG radix tree.
 	 *
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index dc40a6d..8ee3939 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -2365,6 +2365,7 @@
 
 			iip->ili_last_fields = iip->ili_fields;
 			iip->ili_fields = 0;
+			iip->ili_fsync_fields = 0;
 			iip->ili_logged = 1;
 			xfs_trans_ail_copy_lsn(mp->m_ail, &iip->ili_flush_lsn,
 						&iip->ili_item.li_lsn);
@@ -3271,8 +3272,8 @@
 	}
 
 	if (clcount) {
-		XFS_STATS_INC(xs_icluster_flushcnt);
-		XFS_STATS_ADD(xs_icluster_flushinode, clcount);
+		XFS_STATS_INC(mp, xs_icluster_flushcnt);
+		XFS_STATS_ADD(mp, xs_icluster_flushinode, clcount);
 	}
 
 out_free:
@@ -3345,7 +3346,7 @@
 	struct xfs_dinode	*dip;
 	int			error;
 
-	XFS_STATS_INC(xs_iflush_count);
+	XFS_STATS_INC(mp, xs_iflush_count);
 
 	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
 	ASSERT(xfs_isiflocked(ip));
@@ -3560,6 +3561,7 @@
 	 */
 	iip->ili_last_fields = iip->ili_fields;
 	iip->ili_fields = 0;
+	iip->ili_fsync_fields = 0;
 	iip->ili_logged = 1;
 
 	xfs_trans_ail_copy_lsn(mp->m_ail, &iip->ili_flush_lsn,
diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c
index 62bd80f..d14b12b 100644
--- a/fs/xfs/xfs_inode_item.c
+++ b/fs/xfs/xfs_inode_item.c
@@ -719,6 +719,7 @@
 		 * attempted.
 		 */
 		iip->ili_fields = 0;
+		iip->ili_fsync_fields = 0;
 	}
 	/*
 	 * Release the inode's flush lock since we're done with it.
diff --git a/fs/xfs/xfs_inode_item.h b/fs/xfs/xfs_inode_item.h
index 488d812..4c7722e 100644
--- a/fs/xfs/xfs_inode_item.h
+++ b/fs/xfs/xfs_inode_item.h
@@ -34,6 +34,7 @@
 	unsigned short		ili_logged;	   /* flushed logged data */
 	unsigned int		ili_last_fields;   /* fields when flushed */
 	unsigned int		ili_fields;	   /* fields to be logged */
+	unsigned int		ili_fsync_fields;  /* logged since last fsync */
 } xfs_inode_log_item_t;
 
 static inline int xfs_inode_clean(xfs_inode_t *ip)
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index ea7d85a..d42738d 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -40,6 +40,7 @@
 #include "xfs_symlink.h"
 #include "xfs_trans.h"
 #include "xfs_pnfs.h"
+#include "xfs_acl.h"
 
 #include <linux/capability.h>
 #include <linux/dcache.h>
@@ -411,7 +412,7 @@
 	if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
 		return -EFAULT;
 	if (al_hreq.buflen < sizeof(struct attrlist) ||
-	    al_hreq.buflen > XATTR_LIST_MAX)
+	    al_hreq.buflen > XFS_XATTR_LIST_MAX)
 		return -EINVAL;
 
 	/*
@@ -455,7 +456,7 @@
 	unsigned char		*kbuf;
 	int			error = -EFAULT;
 
-	if (*len > XATTR_SIZE_MAX)
+	if (*len > XFS_XATTR_SIZE_MAX)
 		return -EINVAL;
 	kbuf = kmem_zalloc_large(*len, KM_SLEEP);
 	if (!kbuf)
@@ -482,17 +483,22 @@
 	__uint32_t		flags)
 {
 	unsigned char		*kbuf;
+	int			error;
 
 	if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
 		return -EPERM;
-	if (len > XATTR_SIZE_MAX)
+	if (len > XFS_XATTR_SIZE_MAX)
 		return -EINVAL;
 
 	kbuf = memdup_user(ubuf, len);
 	if (IS_ERR(kbuf))
 		return PTR_ERR(kbuf);
 
-	return xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
+	error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
+	if (!error)
+		xfs_forget_acl(inode, name, flags);
+	kfree(kbuf);
+	return error;
 }
 
 int
@@ -501,9 +507,14 @@
 	unsigned char		*name,
 	__uint32_t		flags)
 {
+	int			error;
+
 	if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
 		return -EPERM;
-	return xfs_attr_remove(XFS_I(inode), name, flags);
+	error = xfs_attr_remove(XFS_I(inode), name, flags);
+	if (!error)
+		xfs_forget_acl(inode, name, flags);
+	return error;
 }
 
 STATIC int
@@ -1028,7 +1039,7 @@
 	xfs_diflags_to_linux(ip);
 	xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
 	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
-	XFS_STATS_INC(xs_ig_attrchg);
+	XFS_STATS_INC(mp, xs_ig_attrchg);
 	return 0;
 }
 
diff --git a/fs/xfs/xfs_ioctl32.c b/fs/xfs/xfs_ioctl32.c
index b88bdc8..1a05d8a 100644
--- a/fs/xfs/xfs_ioctl32.c
+++ b/fs/xfs/xfs_ioctl32.c
@@ -356,7 +356,7 @@
 			   sizeof(compat_xfs_fsop_attrlist_handlereq_t)))
 		return -EFAULT;
 	if (al_hreq.buflen < sizeof(struct attrlist) ||
-	    al_hreq.buflen > XATTR_LIST_MAX)
+	    al_hreq.buflen > XFS_XATTR_LIST_MAX)
 		return -EINVAL;
 
 	/*
diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
index b48c6b52..f4f5b43 100644
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -131,21 +131,30 @@
 	uint		qblocks, resblks, resrtextents;
 	int		committed;
 	int		error;
+	int		lockmode;
 	int		bmapi_flags = XFS_BMAPI_PREALLOC;
 
-	error = xfs_qm_dqattach(ip, 0);
-	if (error)
-		return error;
-
 	rt = XFS_IS_REALTIME_INODE(ip);
 	extsz = xfs_get_extsz_hint(ip);
+	lockmode = XFS_ILOCK_SHARED;	/* locked by caller */
+
+	ASSERT(xfs_isilocked(ip, lockmode));
 
 	offset_fsb = XFS_B_TO_FSBT(mp, offset);
 	last_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)(offset + count)));
 	if ((offset + count) > XFS_ISIZE(ip)) {
+		/*
+		 * Assert that the in-core extent list is present since this can
+		 * call xfs_iread_extents() and we only have the ilock shared.
+		 * This should be safe because the lock was held around a bmapi
+		 * call in the caller and we only need it to access the in-core
+		 * list.
+		 */
+		ASSERT(XFS_IFORK_PTR(ip, XFS_DATA_FORK)->if_flags &
+								XFS_IFEXTENTS);
 		error = xfs_iomap_eof_align_last_fsb(mp, ip, extsz, &last_fsb);
 		if (error)
-			return error;
+			goto out_unlock;
 	} else {
 		if (nmaps && (imap->br_startblock == HOLESTARTBLOCK))
 			last_fsb = MIN(last_fsb, (xfs_fileoff_t)
@@ -175,6 +184,15 @@
 	}
 
 	/*
+	 * Drop the shared lock acquired by the caller, attach the dquot if
+	 * necessary and move on to transaction setup.
+	 */
+	xfs_iunlock(ip, lockmode);
+	error = xfs_qm_dqattach(ip, 0);
+	if (error)
+		return error;
+
+	/*
 	 * Allocate and setup the transaction
 	 */
 	tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT);
@@ -205,7 +223,8 @@
 		return error;
 	}
 
-	xfs_ilock(ip, XFS_ILOCK_EXCL);
+	lockmode = XFS_ILOCK_EXCL;
+	xfs_ilock(ip, lockmode);
 
 	error = xfs_trans_reserve_quota_nblks(tp, ip, qblocks, 0, quota_flag);
 	if (error)
@@ -220,7 +239,7 @@
 	xfs_bmap_init(&free_list, &firstfsb);
 	nimaps = 1;
 	error = xfs_bmapi_write(tp, ip, offset_fsb, count_fsb,
-				bmapi_flags, &firstfsb, 0, imap,
+				bmapi_flags, &firstfsb, resblks, imap,
 				&nimaps, &free_list);
 	if (error)
 		goto out_bmap_cancel;
@@ -248,7 +267,7 @@
 		error = xfs_alert_fsblock_zero(ip, imap);
 
 out_unlock:
-	xfs_iunlock(ip, XFS_ILOCK_EXCL);
+	xfs_iunlock(ip, lockmode);
 	return error;
 
 out_bmap_cancel:
@@ -689,7 +708,7 @@
 	count_fsb = imap->br_blockcount;
 	map_start_fsb = imap->br_startoff;
 
-	XFS_STATS_ADD(xs_xstrat_bytes, XFS_FSB_TO_B(mp, count_fsb));
+	XFS_STATS_ADD(mp, xs_xstrat_bytes, XFS_FSB_TO_B(mp, count_fsb));
 
 	while (count_fsb != 0) {
 		/*
@@ -769,9 +788,9 @@
 			 * pointer that the caller gave to us.
 			 */
 			error = xfs_bmapi_write(tp, ip, map_start_fsb,
-						count_fsb, 0,
-						&first_block, 1,
-						imap, &nimaps, &free_list);
+						count_fsb, 0, &first_block,
+						nres, imap, &nimaps,
+						&free_list);
 			if (error)
 				goto trans_cancel;
 
@@ -796,7 +815,7 @@
 		if ((offset_fsb >= imap->br_startoff) &&
 		    (offset_fsb < (imap->br_startoff +
 				   imap->br_blockcount))) {
-			XFS_STATS_INC(xs_xstrat_quick);
+			XFS_STATS_INC(mp, xs_xstrat_quick);
 			return 0;
 		}
 
@@ -885,8 +904,8 @@
 		xfs_bmap_init(&free_list, &firstfsb);
 		nimaps = 1;
 		error = xfs_bmapi_write(tp, ip, offset_fsb, count_fsb,
-				  XFS_BMAPI_CONVERT, &firstfsb,
-				  1, &imap, &nimaps, &free_list);
+					XFS_BMAPI_CONVERT, &firstfsb, resblks,
+					&imap, &nimaps, &free_list);
 		if (error)
 			goto error_on_bmapi_transaction;
 
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index 8294132..245268a 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -695,7 +695,7 @@
 
 	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
 
-	XFS_STATS_INC(xs_ig_attrchg);
+	XFS_STATS_INC(mp, xs_ig_attrchg);
 
 	if (mp->m_flags & XFS_MOUNT_WSYNC)
 		xfs_trans_set_sync(tp);
@@ -922,7 +922,7 @@
 
 	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
 
-	XFS_STATS_INC(xs_ig_attrchg);
+	XFS_STATS_INC(mp, xs_ig_attrchg);
 
 	if (mp->m_flags & XFS_MOUNT_WSYNC)
 		xfs_trans_set_sync(tp);
diff --git a/fs/xfs/xfs_linux.h b/fs/xfs/xfs_linux.h
index 85f883d..ec0e239 100644
--- a/fs/xfs/xfs_linux.h
+++ b/fs/xfs/xfs_linux.h
@@ -171,6 +171,13 @@
 	struct completion	complete;
 };
 
+struct xstats {
+	struct xfsstats __percpu	*xs_stats;
+	struct xfs_kobj			xs_kobj;
+};
+
+extern struct xstats xfsstats;
+
 /* Kernel uid/gid conversion. These are used to convert to/from the on disk
  * uid_t/gid_t types to the kuid_t/kgid_t types that the kernel uses internally.
  * The conversion here is type only, the value will remain the same since we
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index aaadee0..f52c72a 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -268,7 +268,7 @@
 		__set_current_state(TASK_UNINTERRUPTIBLE);
 		spin_unlock(&head->lock);
 
-		XFS_STATS_INC(xs_sleep_logspace);
+		XFS_STATS_INC(log->l_mp, xs_sleep_logspace);
 
 		trace_xfs_log_grant_sleep(log, tic);
 		schedule();
@@ -379,7 +379,7 @@
 	if (XLOG_FORCED_SHUTDOWN(log))
 		return -EIO;
 
-	XFS_STATS_INC(xs_try_logspace);
+	XFS_STATS_INC(mp, xs_try_logspace);
 
 	/*
 	 * This is a new transaction on the ticket, so we need to change the
@@ -448,7 +448,7 @@
 	if (XLOG_FORCED_SHUTDOWN(log))
 		return -EIO;
 
-	XFS_STATS_INC(xs_try_logspace);
+	XFS_STATS_INC(mp, xs_try_logspace);
 
 	ASSERT(*ticp == NULL);
 	tic = xlog_ticket_alloc(log, unit_bytes, cnt, client, permanent,
@@ -1768,7 +1768,7 @@
 	int		v2 = xfs_sb_version_haslogv2(&log->l_mp->m_sb);
 	int		size;
 
-	XFS_STATS_INC(xs_log_writes);
+	XFS_STATS_INC(log->l_mp, xs_log_writes);
 	ASSERT(atomic_read(&iclog->ic_refcnt) == 0);
 
 	/* Add for LR header */
@@ -1805,7 +1805,7 @@
 	bp = iclog->ic_bp;
 	XFS_BUF_SET_ADDR(bp, BLOCK_LSN(be64_to_cpu(iclog->ic_header.h_lsn)));
 
-	XFS_STATS_ADD(xs_log_blocks, BTOBB(count));
+	XFS_STATS_ADD(log->l_mp, xs_log_blocks, BTOBB(count));
 
 	/* Do we need to split this write into 2 parts? */
 	if (XFS_BUF_ADDR(bp) + BTOBB(count) > log->l_logBBsize) {
@@ -2422,11 +2422,20 @@
 						     &partial_copy_len);
 			xlog_verify_dest_ptr(log, ptr);
 
-			/* copy region */
+			/*
+			 * Copy region.
+			 *
+			 * Unmount records just log an opheader, so can have
+			 * empty payloads with no data region to copy. Hence we
+			 * only copy the payload if the vector says it has data
+			 * to copy.
+			 */
 			ASSERT(copy_len >= 0);
-			memcpy(ptr, reg->i_addr + copy_off, copy_len);
-			xlog_write_adv_cnt(&ptr, &len, &log_offset, copy_len);
-
+			if (copy_len > 0) {
+				memcpy(ptr, reg->i_addr + copy_off, copy_len);
+				xlog_write_adv_cnt(&ptr, &len, &log_offset,
+						   copy_len);
+			}
 			copy_len += start_rec_copy + sizeof(xlog_op_header_t);
 			record_cnt++;
 			data_cnt += contwr ? copy_len : 0;
@@ -2913,7 +2922,7 @@
 
 	iclog = log->l_iclog;
 	if (iclog->ic_state != XLOG_STATE_ACTIVE) {
-		XFS_STATS_INC(xs_log_noiclogs);
+		XFS_STATS_INC(log->l_mp, xs_log_noiclogs);
 
 		/* Wait for log writes to have flushed */
 		xlog_wait(&log->l_flush_wait, &log->l_icloglock);
@@ -3165,11 +3174,19 @@
 	}
 
 	if (log->l_curr_block >= log->l_logBBsize) {
+		/*
+		 * Rewind the current block before the cycle is bumped to make
+		 * sure that the combined LSN never transiently moves forward
+		 * when the log wraps to the next cycle. This is to support the
+		 * unlocked sample of these fields from xlog_valid_lsn(). Most
+		 * other cases should acquire l_icloglock.
+		 */
+		log->l_curr_block -= log->l_logBBsize;
+		ASSERT(log->l_curr_block >= 0);
+		smp_wmb();
 		log->l_curr_cycle++;
 		if (log->l_curr_cycle == XLOG_HEADER_MAGIC_NUM)
 			log->l_curr_cycle++;
-		log->l_curr_block -= log->l_logBBsize;
-		ASSERT(log->l_curr_block >= 0);
 	}
 	ASSERT(iclog == log->l_iclog);
 	log->l_iclog = iclog->ic_next;
@@ -3212,7 +3229,7 @@
 	struct xlog_in_core	*iclog;
 	xfs_lsn_t		lsn;
 
-	XFS_STATS_INC(xs_log_force);
+	XFS_STATS_INC(mp, xs_log_force);
 
 	xlog_cil_force(log);
 
@@ -3297,7 +3314,7 @@
 			spin_unlock(&log->l_icloglock);
 			return -EIO;
 		}
-		XFS_STATS_INC(xs_log_force_sleep);
+		XFS_STATS_INC(mp, xs_log_force_sleep);
 		xlog_wait(&iclog->ic_force_wait, &log->l_icloglock);
 		/*
 		 * No need to grab the log lock here since we're
@@ -3362,7 +3379,7 @@
 
 	ASSERT(lsn != 0);
 
-	XFS_STATS_INC(xs_log_force);
+	XFS_STATS_INC(mp, xs_log_force);
 
 	lsn = xlog_cil_force_lsn(log, lsn);
 	if (lsn == NULLCOMMITLSN)
@@ -3411,7 +3428,7 @@
 			     (XLOG_STATE_WANT_SYNC | XLOG_STATE_SYNCING))) {
 				ASSERT(!(iclog->ic_state & XLOG_STATE_IOERROR));
 
-				XFS_STATS_INC(xs_log_force_sleep);
+				XFS_STATS_INC(mp, xs_log_force_sleep);
 
 				xlog_wait(&iclog->ic_prev->ic_write_wait,
 							&log->l_icloglock);
@@ -3441,7 +3458,7 @@
 				spin_unlock(&log->l_icloglock);
 				return -EIO;
 			}
-			XFS_STATS_INC(xs_log_force_sleep);
+			XFS_STATS_INC(mp, xs_log_force_sleep);
 			xlog_wait(&iclog->ic_force_wait, &log->l_icloglock);
 			/*
 			 * No need to grab the log lock here since we're
@@ -4023,3 +4040,45 @@
 	return 1;
 }
 
+/*
+ * Verify that an LSN stamped into a piece of metadata is valid. This is
+ * intended for use in read verifiers on v5 superblocks.
+ */
+bool
+xfs_log_check_lsn(
+	struct xfs_mount	*mp,
+	xfs_lsn_t		lsn)
+{
+	struct xlog		*log = mp->m_log;
+	bool			valid;
+
+	/*
+	 * norecovery mode skips mount-time log processing and unconditionally
+	 * resets the in-core LSN. We can't validate in this mode, but
+	 * modifications are not allowed anyways so just return true.
+	 */
+	if (mp->m_flags & XFS_MOUNT_NORECOVERY)
+		return true;
+
+	/*
+	 * Some metadata LSNs are initialized to NULL (e.g., the agfl). This is
+	 * handled by recovery and thus safe to ignore here.
+	 */
+	if (lsn == NULLCOMMITLSN)
+		return true;
+
+	valid = xlog_valid_lsn(mp->m_log, lsn);
+
+	/* warn the user about what's gone wrong before verifier failure */
+	if (!valid) {
+		spin_lock(&log->l_icloglock);
+		xfs_warn(mp,
+"Corruption warning: Metadata has LSN (%d:%d) ahead of current LSN (%d:%d). "
+"Please unmount and run xfs_repair (>= v4.3) to resolve.",
+			 CYCLE_LSN(lsn), BLOCK_LSN(lsn),
+			 log->l_curr_cycle, log->l_curr_block);
+		spin_unlock(&log->l_icloglock);
+	}
+
+	return valid;
+}
diff --git a/fs/xfs/xfs_log.h b/fs/xfs/xfs_log.h
index 09d91d3..aa533a7 100644
--- a/fs/xfs/xfs_log.h
+++ b/fs/xfs/xfs_log.h
@@ -181,5 +181,6 @@
 void	xfs_log_work_queue(struct xfs_mount *mp);
 void	xfs_log_worker(struct work_struct *work);
 void	xfs_log_quiesce(struct xfs_mount *mp);
+bool	xfs_log_check_lsn(struct xfs_mount *, xfs_lsn_t);
 
 #endif	/* __XFS_LOG_H__ */
diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h
index 950f3f9..8daba74 100644
--- a/fs/xfs/xfs_log_priv.h
+++ b/fs/xfs/xfs_log_priv.h
@@ -560,4 +560,55 @@
 	remove_wait_queue(wq, &wait);
 }
 
+/*
+ * The LSN is valid so long as it is behind the current LSN. If it isn't, this
+ * means that the next log record that includes this metadata could have a
+ * smaller LSN. In turn, this means that the modification in the log would not
+ * replay.
+ */
+static inline bool
+xlog_valid_lsn(
+	struct xlog	*log,
+	xfs_lsn_t	lsn)
+{
+	int		cur_cycle;
+	int		cur_block;
+	bool		valid = true;
+
+	/*
+	 * First, sample the current lsn without locking to avoid added
+	 * contention from metadata I/O. The current cycle and block are updated
+	 * (in xlog_state_switch_iclogs()) and read here in a particular order
+	 * to avoid false negatives (e.g., thinking the metadata LSN is valid
+	 * when it is not).
+	 *
+	 * The current block is always rewound before the cycle is bumped in
+	 * xlog_state_switch_iclogs() to ensure the current LSN is never seen in
+	 * a transiently forward state. Instead, we can see the LSN in a
+	 * transiently behind state if we happen to race with a cycle wrap.
+	 */
+	cur_cycle = ACCESS_ONCE(log->l_curr_cycle);
+	smp_rmb();
+	cur_block = ACCESS_ONCE(log->l_curr_block);
+
+	if ((CYCLE_LSN(lsn) > cur_cycle) ||
+	    (CYCLE_LSN(lsn) == cur_cycle && BLOCK_LSN(lsn) > cur_block)) {
+		/*
+		 * If the metadata LSN appears invalid, it's possible the check
+		 * above raced with a wrap to the next log cycle. Grab the lock
+		 * to check for sure.
+		 */
+		spin_lock(&log->l_icloglock);
+		cur_cycle = log->l_curr_cycle;
+		cur_block = log->l_curr_block;
+		spin_unlock(&log->l_icloglock);
+
+		if ((CYCLE_LSN(lsn) > cur_cycle) ||
+		    (CYCLE_LSN(lsn) == cur_cycle && BLOCK_LSN(lsn) > cur_block))
+			valid = false;
+	}
+
+	return valid;
+}
+
 #endif	/* __XFS_LOG_PRIV_H__ */
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index 512a094..f8f1363 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -4609,9 +4609,19 @@
 	int		error;
 
 	/* find the tail of the log */
-	if ((error = xlog_find_tail(log, &head_blk, &tail_blk)))
+	error = xlog_find_tail(log, &head_blk, &tail_blk);
+	if (error)
 		return error;
 
+	/*
+	 * The superblock was read before the log was available and thus the LSN
+	 * could not be verified. Check the superblock LSN against the current
+	 * LSN now that it's known.
+	 */
+	if (xfs_sb_version_hascrc(&log->l_mp->m_sb) &&
+	    !xfs_log_check_lsn(log->l_mp, log->l_mp->m_sb.sb_lsn))
+		return -EINVAL;
+
 	if (tail_blk != head_blk) {
 		/* There used to be a comment here:
 		 *
diff --git a/fs/xfs/xfs_message.c b/fs/xfs/xfs_message.c
index d8b6754..11792d8 100644
--- a/fs/xfs/xfs_message.c
+++ b/fs/xfs/xfs_message.c
@@ -17,6 +17,7 @@
 
 #include "xfs.h"
 #include "xfs_fs.h"
+#include "xfs_error.h"
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
@@ -43,6 +44,7 @@
 {								\
 	struct va_format	vaf;				\
 	va_list			args;				\
+	int			level;				\
 								\
 	va_start(args, fmt);					\
 								\
@@ -51,6 +53,11 @@
 								\
 	__xfs_printk(kern_level, mp, &vaf);			\
 	va_end(args);						\
+								\
+	if (!kstrtoint(kern_level, 0, &level) &&		\
+	    level <= LOGLEVEL_ERR &&				\
+	    xfs_error_level >= XFS_ERRLEVEL_HIGH)		\
+		xfs_stack_trace();				\
 }								\
 
 define_xfs_printk_level(xfs_emerg, KERN_EMERG);
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index bf92e0c..bb753b3 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -47,6 +47,16 @@
 static int xfs_uuid_table_size;
 static uuid_t *xfs_uuid_table;
 
+void
+xfs_uuid_table_free(void)
+{
+	if (xfs_uuid_table_size == 0)
+		return;
+	kmem_free(xfs_uuid_table);
+	xfs_uuid_table = NULL;
+	xfs_uuid_table_size = 0;
+}
+
 /*
  * See if the UUID is unique among mounted XFS filesystems.
  * Mount fails if UUID is nil or a FS with the same UUID is already mounted.
@@ -693,10 +703,15 @@
 	if (error)
 		goto out;
 
-	error = xfs_uuid_mount(mp);
+	error = xfs_sysfs_init(&mp->m_stats.xs_kobj, &xfs_stats_ktype,
+			       &mp->m_kobj, "stats");
 	if (error)
 		goto out_remove_sysfs;
 
+	error = xfs_uuid_mount(mp);
+	if (error)
+		goto out_del_stats;
+
 	/*
 	 * Set the minimum read and write sizes
 	 */
@@ -971,6 +986,8 @@
 	xfs_da_unmount(mp);
  out_remove_uuid:
 	xfs_uuid_unmount(mp);
+ out_del_stats:
+	xfs_sysfs_del(&mp->m_stats.xs_kobj);
  out_remove_sysfs:
 	xfs_sysfs_del(&mp->m_kobj);
  out:
@@ -1047,6 +1064,7 @@
 		xfs_warn(mp, "Unable to update superblock counters. "
 				"Freespace may not be correct on next mount.");
 
+
 	xfs_log_unmount(mp);
 	xfs_da_unmount(mp);
 	xfs_uuid_unmount(mp);
@@ -1056,6 +1074,7 @@
 #endif
 	xfs_free_perag(mp);
 
+	xfs_sysfs_del(&mp->m_stats.xs_kobj);
 	xfs_sysfs_del(&mp->m_kobj);
 }
 
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index 404bfa5..b570984 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -127,6 +127,7 @@
 	int64_t			m_low_space[XFS_LOWSP_MAX];
 						/* low free space thresholds */
 	struct xfs_kobj		m_kobj;
+	struct xstats		m_stats;	/* per-fs stats */
 
 	struct workqueue_struct *m_buf_workqueue;
 	struct workqueue_struct	*m_data_workqueue;
@@ -312,6 +313,7 @@
 	int		pagb_count;	/* pagb slots in use */
 } xfs_perag_t;
 
+extern void	xfs_uuid_table_free(void);
 extern int	xfs_log_sbcount(xfs_mount_t *);
 extern __uint64_t xfs_default_resblks(xfs_mount_t *mp);
 extern int	xfs_mountfs(xfs_mount_t *mp);
diff --git a/fs/xfs/xfs_pnfs.c b/fs/xfs/xfs_pnfs.c
index ab4a606..dc62219 100644
--- a/fs/xfs/xfs_pnfs.c
+++ b/fs/xfs/xfs_pnfs.c
@@ -181,6 +181,11 @@
 		ASSERT(imap.br_startblock != DELAYSTARTBLOCK);
 
 		if (!nimaps || imap.br_startblock == HOLESTARTBLOCK) {
+			/*
+			 * xfs_iomap_write_direct() expects to take ownership of
+			 * the shared ilock.
+			 */
+			xfs_ilock(ip, XFS_ILOCK_SHARED);
 			error = xfs_iomap_write_direct(ip, offset, length,
 						       &imap, nimaps);
 			if (error)
diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c
index eac9549..7af7648 100644
--- a/fs/xfs/xfs_qm.c
+++ b/fs/xfs/xfs_qm.c
@@ -184,7 +184,7 @@
 	 */
 	ASSERT(!list_empty(&dqp->q_lru));
 	list_lru_del(&qi->qi_lru, &dqp->q_lru);
-	XFS_STATS_DEC(xs_qm_dquot_unused);
+	XFS_STATS_DEC(mp, xs_qm_dquot_unused);
 
 	xfs_qm_dqdestroy(dqp);
 	return 0;
@@ -448,11 +448,11 @@
 	 */
 	if (dqp->q_nrefs) {
 		xfs_dqunlock(dqp);
-		XFS_STATS_INC(xs_qm_dqwants);
+		XFS_STATS_INC(dqp->q_mount, xs_qm_dqwants);
 
 		trace_xfs_dqreclaim_want(dqp);
 		list_lru_isolate(lru, &dqp->q_lru);
-		XFS_STATS_DEC(xs_qm_dquot_unused);
+		XFS_STATS_DEC(dqp->q_mount, xs_qm_dquot_unused);
 		return LRU_REMOVED;
 	}
 
@@ -496,19 +496,19 @@
 
 	ASSERT(dqp->q_nrefs == 0);
 	list_lru_isolate_move(lru, &dqp->q_lru, &isol->dispose);
-	XFS_STATS_DEC(xs_qm_dquot_unused);
+	XFS_STATS_DEC(dqp->q_mount, xs_qm_dquot_unused);
 	trace_xfs_dqreclaim_done(dqp);
-	XFS_STATS_INC(xs_qm_dqreclaims);
+	XFS_STATS_INC(dqp->q_mount, xs_qm_dqreclaims);
 	return LRU_REMOVED;
 
 out_miss_busy:
 	trace_xfs_dqreclaim_busy(dqp);
-	XFS_STATS_INC(xs_qm_dqreclaim_misses);
+	XFS_STATS_INC(dqp->q_mount, xs_qm_dqreclaim_misses);
 	return LRU_SKIP;
 
 out_unlock_dirty:
 	trace_xfs_dqreclaim_busy(dqp);
-	XFS_STATS_INC(xs_qm_dqreclaim_misses);
+	XFS_STATS_INC(dqp->q_mount, xs_qm_dqreclaim_misses);
 	xfs_dqunlock(dqp);
 	spin_lock(lru_lock);
 	return LRU_RETRY;
diff --git a/fs/xfs/xfs_stats.c b/fs/xfs/xfs_stats.c
index f224038..8686df6 100644
--- a/fs/xfs/xfs_stats.c
+++ b/fs/xfs/xfs_stats.c
@@ -18,20 +18,21 @@
 #include "xfs.h"
 #include <linux/proc_fs.h>
 
-DEFINE_PER_CPU(struct xfsstats, xfsstats);
+struct xstats xfsstats;
 
-static int counter_val(int idx)
+static int counter_val(struct xfsstats __percpu *stats, int idx)
 {
 	int val = 0, cpu;
 
 	for_each_possible_cpu(cpu)
-		val += *(((__u32 *)&per_cpu(xfsstats, cpu) + idx));
+		val += *(((__u32 *)per_cpu_ptr(stats, cpu) + idx));
 	return val;
 }
 
-static int xfs_stat_proc_show(struct seq_file *m, void *v)
+int xfs_stats_format(struct xfsstats __percpu *stats, char *buf)
 {
 	int		i, j;
+	int		len = 0;
 	__uint64_t	xs_xstrat_bytes = 0;
 	__uint64_t	xs_write_bytes = 0;
 	__uint64_t	xs_read_bytes = 0;
@@ -65,43 +66,50 @@
 	};
 
 	/* Loop over all stats groups */
+
 	for (i = j = 0; i < ARRAY_SIZE(xstats); i++) {
-		seq_printf(m, "%s", xstats[i].desc);
+		len += snprintf(buf + len, PATH_MAX - len, "%s",
+				xstats[i].desc);
 		/* inner loop does each group */
 		for (; j < xstats[i].endpoint; j++)
-			seq_printf(m, " %u", counter_val(j));
-		seq_putc(m, '\n');
+			len += snprintf(buf + len, PATH_MAX - len, " %u",
+					counter_val(stats, j));
+		len += snprintf(buf + len, PATH_MAX - len, "\n");
 	}
 	/* extra precision counters */
 	for_each_possible_cpu(i) {
-		xs_xstrat_bytes += per_cpu(xfsstats, i).xs_xstrat_bytes;
-		xs_write_bytes += per_cpu(xfsstats, i).xs_write_bytes;
-		xs_read_bytes += per_cpu(xfsstats, i).xs_read_bytes;
+		xs_xstrat_bytes += per_cpu_ptr(stats, i)->xs_xstrat_bytes;
+		xs_write_bytes += per_cpu_ptr(stats, i)->xs_write_bytes;
+		xs_read_bytes += per_cpu_ptr(stats, i)->xs_read_bytes;
 	}
 
-	seq_printf(m, "xpc %Lu %Lu %Lu\n",
+	len += snprintf(buf + len, PATH_MAX-len, "xpc %Lu %Lu %Lu\n",
 			xs_xstrat_bytes, xs_write_bytes, xs_read_bytes);
-	seq_printf(m, "debug %u\n",
+	len += snprintf(buf + len, PATH_MAX-len, "debug %u\n",
 #if defined(DEBUG)
 		1);
 #else
 		0);
 #endif
-	return 0;
+
+	return len;
 }
 
-static int xfs_stat_proc_open(struct inode *inode, struct file *file)
+void xfs_stats_clearall(struct xfsstats __percpu *stats)
 {
-	return single_open(file, xfs_stat_proc_show, NULL);
-}
+	int		c;
+	__uint32_t	vn_active;
 
-static const struct file_operations xfs_stat_proc_fops = {
-	.owner		= THIS_MODULE,
-	.open		= xfs_stat_proc_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
+	xfs_notice(NULL, "Clearing xfsstats");
+	for_each_possible_cpu(c) {
+		preempt_disable();
+		/* save vn_active, it's a universal truth! */
+		vn_active = per_cpu_ptr(stats, c)->vn_active;
+		memset(per_cpu_ptr(stats, c), 0, sizeof(*stats));
+		per_cpu_ptr(stats, c)->vn_active = vn_active;
+		preempt_enable();
+	}
+}
 
 /* legacy quota interfaces */
 #ifdef CONFIG_XFS_QUOTA
@@ -109,10 +117,8 @@
 {
 	/* maximum; incore; ratio free to inuse; freelist */
 	seq_printf(m, "%d\t%d\t%d\t%u\n",
-			0,
-			counter_val(XFSSTAT_END_XQMSTAT),
-			0,
-			counter_val(XFSSTAT_END_XQMSTAT + 1));
+		   0, counter_val(xfsstats.xs_stats, XFSSTAT_END_XQMSTAT),
+		   0, counter_val(xfsstats.xs_stats, XFSSTAT_END_XQMSTAT + 1));
 	return 0;
 }
 
@@ -136,7 +142,7 @@
 
 	seq_printf(m, "qm");
 	for (j = XFSSTAT_END_IBT_V2; j < XFSSTAT_END_XQMSTAT; j++)
-		seq_printf(m, " %u", counter_val(j));
+		seq_printf(m, " %u", counter_val(xfsstats.xs_stats, j));
 	seq_putc(m, '\n');
 	return 0;
 }
@@ -155,44 +161,35 @@
 };
 #endif /* CONFIG_XFS_QUOTA */
 
+#ifdef CONFIG_PROC_FS
 int
 xfs_init_procfs(void)
 {
 	if (!proc_mkdir("fs/xfs", NULL))
+		return -ENOMEM;
+
+	if (!proc_symlink("fs/xfs/stat", NULL,
+			  "/sys/fs/xfs/stats/stats"))
 		goto out;
 
-	if (!proc_create("fs/xfs/stat", 0, NULL,
-			 &xfs_stat_proc_fops))
-		goto out_remove_xfs_dir;
 #ifdef CONFIG_XFS_QUOTA
 	if (!proc_create("fs/xfs/xqmstat", 0, NULL,
 			 &xqmstat_proc_fops))
-		goto out_remove_stat_file;
+		goto out;
 	if (!proc_create("fs/xfs/xqm", 0, NULL,
 			 &xqm_proc_fops))
-		goto out_remove_xqmstat_file;
+		goto out;
 #endif
 	return 0;
 
-#ifdef CONFIG_XFS_QUOTA
- out_remove_xqmstat_file:
-	remove_proc_entry("fs/xfs/xqmstat", NULL);
- out_remove_stat_file:
-	remove_proc_entry("fs/xfs/stat", NULL);
-#endif
- out_remove_xfs_dir:
-	remove_proc_entry("fs/xfs", NULL);
- out:
+out:
+	remove_proc_subtree("fs/xfs", NULL);
 	return -ENOMEM;
 }
 
 void
 xfs_cleanup_procfs(void)
 {
-#ifdef CONFIG_XFS_QUOTA
-	remove_proc_entry("fs/xfs/xqm", NULL);
-	remove_proc_entry("fs/xfs/xqmstat", NULL);
-#endif
-	remove_proc_entry("fs/xfs/stat", NULL);
-	remove_proc_entry("fs/xfs", NULL);
+	remove_proc_subtree("fs/xfs", NULL);
 }
+#endif /* CONFIG_PROC_FS */
diff --git a/fs/xfs/xfs_stats.h b/fs/xfs/xfs_stats.h
index c8f238b..483b0ef 100644
--- a/fs/xfs/xfs_stats.h
+++ b/fs/xfs/xfs_stats.h
@@ -19,8 +19,6 @@
 #define __XFS_STATS_H__
 
 
-#if defined(CONFIG_PROC_FS) && !defined(XFS_STATS_OFF)
-
 #include <linux/percpu.h>
 
 /*
@@ -215,15 +213,29 @@
 	__uint64_t		xs_read_bytes;
 };
 
-DECLARE_PER_CPU(struct xfsstats, xfsstats);
+int xfs_stats_format(struct xfsstats __percpu *stats, char *buf);
+void xfs_stats_clearall(struct xfsstats __percpu *stats);
+extern struct xstats xfsstats;
 
-/*
- * We don't disable preempt, not too worried about poking the
- * wrong CPU's stat for now (also aggregated before reporting).
- */
-#define XFS_STATS_INC(v)	(per_cpu(xfsstats, current_cpu()).v++)
-#define XFS_STATS_DEC(v)	(per_cpu(xfsstats, current_cpu()).v--)
-#define XFS_STATS_ADD(v, inc)	(per_cpu(xfsstats, current_cpu()).v += (inc))
+#define XFS_STATS_INC(mp, v)					\
+do {								\
+	per_cpu_ptr(xfsstats.xs_stats, current_cpu())->v++;	\
+	per_cpu_ptr(mp->m_stats.xs_stats, current_cpu())->v++;	\
+} while (0)
+
+#define XFS_STATS_DEC(mp, v)					\
+do {								\
+	per_cpu_ptr(xfsstats.xs_stats, current_cpu())->v--;	\
+	per_cpu_ptr(mp->m_stats.xs_stats, current_cpu())->v--;	\
+} while (0)
+
+#define XFS_STATS_ADD(mp, v, inc)					\
+do {									\
+	per_cpu_ptr(xfsstats.xs_stats, current_cpu())->v += (inc);	\
+	per_cpu_ptr(mp->m_stats.xs_stats, current_cpu())->v += (inc);	\
+} while (0)
+
+#if defined(CONFIG_PROC_FS)
 
 extern int xfs_init_procfs(void);
 extern void xfs_cleanup_procfs(void);
@@ -231,10 +243,6 @@
 
 #else	/* !CONFIG_PROC_FS */
 
-# define XFS_STATS_INC(count)
-# define XFS_STATS_DEC(count)
-# define XFS_STATS_ADD(count, inc)
-
 static inline int xfs_init_procfs(void)
 {
 	return 0;
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 904f637c..0378e22e 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -922,7 +922,7 @@
 
 	trace_xfs_destroy_inode(ip);
 
-	XFS_STATS_INC(vn_reclaim);
+	XFS_STATS_INC(ip->i_mount, vn_reclaim);
 
 	ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0);
 
@@ -983,8 +983,8 @@
 
 	truncate_inode_pages_final(&inode->i_data);
 	clear_inode(inode);
-	XFS_STATS_INC(vn_rele);
-	XFS_STATS_INC(vn_remove);
+	XFS_STATS_INC(ip->i_mount, vn_rele);
+	XFS_STATS_INC(ip->i_mount, vn_remove);
 
 	xfs_inactive(ip);
 }
@@ -1474,9 +1474,16 @@
 	if (error)
 		goto out_destroy_workqueues;
 
+	/* Allocate stats memory before we do operations that might use it */
+	mp->m_stats.xs_stats = alloc_percpu(struct xfsstats);
+	if (!mp->m_stats.xs_stats) {
+		error = -ENOMEM;
+		goto out_destroy_counters;
+	}
+
 	error = xfs_readsb(mp, flags);
 	if (error)
-		goto out_destroy_counters;
+		goto out_free_stats;
 
 	error = xfs_finish_flags(mp);
 	if (error)
@@ -1545,9 +1552,11 @@
 	xfs_filestream_unmount(mp);
  out_free_sb:
 	xfs_freesb(mp);
+ out_free_stats:
+	free_percpu(mp->m_stats.xs_stats);
  out_destroy_counters:
 	xfs_destroy_percpu_counters(mp);
-out_destroy_workqueues:
+ out_destroy_workqueues:
 	xfs_destroy_mount_workqueues(mp);
  out_close_devices:
 	xfs_close_devices(mp);
@@ -1574,6 +1583,7 @@
 	xfs_unmountfs(mp);
 
 	xfs_freesb(mp);
+	free_percpu(mp->m_stats.xs_stats);
 	xfs_destroy_percpu_counters(mp);
 	xfs_destroy_mount_workqueues(mp);
 	xfs_close_devices(mp);
@@ -1838,19 +1848,32 @@
 	xfs_kset = kset_create_and_add("xfs", NULL, fs_kobj);
 	if (!xfs_kset) {
 		error = -ENOMEM;
-		goto out_sysctl_unregister;;
+		goto out_sysctl_unregister;
 	}
 
+	xfsstats.xs_kobj.kobject.kset = xfs_kset;
+
+	xfsstats.xs_stats = alloc_percpu(struct xfsstats);
+	if (!xfsstats.xs_stats) {
+		error = -ENOMEM;
+		goto out_kset_unregister;
+	}
+
+	error = xfs_sysfs_init(&xfsstats.xs_kobj, &xfs_stats_ktype, NULL,
+			       "stats");
+	if (error)
+		goto out_free_stats;
+
 #ifdef DEBUG
 	xfs_dbg_kobj.kobject.kset = xfs_kset;
 	error = xfs_sysfs_init(&xfs_dbg_kobj, &xfs_dbg_ktype, NULL, "debug");
 	if (error)
-		goto out_kset_unregister;
+		goto out_remove_stats_kobj;
 #endif
 
 	error = xfs_qm_init();
 	if (error)
-		goto out_remove_kobj;
+		goto out_remove_dbg_kobj;
 
 	error = register_filesystem(&xfs_fs_type);
 	if (error)
@@ -1859,11 +1882,15 @@
 
  out_qm_exit:
 	xfs_qm_exit();
- out_remove_kobj:
+ out_remove_dbg_kobj:
 #ifdef DEBUG
 	xfs_sysfs_del(&xfs_dbg_kobj);
- out_kset_unregister:
+ out_remove_stats_kobj:
 #endif
+	xfs_sysfs_del(&xfsstats.xs_kobj);
+ out_free_stats:
+	free_percpu(xfsstats.xs_stats);
+ out_kset_unregister:
 	kset_unregister(xfs_kset);
  out_sysctl_unregister:
 	xfs_sysctl_unregister();
@@ -1889,6 +1916,8 @@
 #ifdef DEBUG
 	xfs_sysfs_del(&xfs_dbg_kobj);
 #endif
+	xfs_sysfs_del(&xfsstats.xs_kobj);
+	free_percpu(xfsstats.xs_stats);
 	kset_unregister(xfs_kset);
 	xfs_sysctl_unregister();
 	xfs_cleanup_procfs();
@@ -1896,6 +1925,7 @@
 	xfs_mru_cache_uninit();
 	xfs_destroy_workqueues();
 	xfs_destroy_zones();
+	xfs_uuid_table_free();
 }
 
 module_init(init_xfs_fs);
diff --git a/fs/xfs/xfs_sysctl.c b/fs/xfs/xfs_sysctl.c
index a0c8067..aed74d3 100644
--- a/fs/xfs/xfs_sysctl.c
+++ b/fs/xfs/xfs_sysctl.c
@@ -19,6 +19,7 @@
 #include <linux/sysctl.h>
 #include <linux/proc_fs.h>
 #include "xfs_error.h"
+#include "xfs_stats.h"
 
 static struct ctl_table_header *xfs_table_header;
 
@@ -31,22 +32,12 @@
 	size_t			*lenp,
 	loff_t			*ppos)
 {
-	int		c, ret, *valp = ctl->data;
-	__uint32_t	vn_active;
+	int		ret, *valp = ctl->data;
 
 	ret = proc_dointvec_minmax(ctl, write, buffer, lenp, ppos);
 
 	if (!ret && write && *valp) {
-		xfs_notice(NULL, "Clearing xfsstats");
-		for_each_possible_cpu(c) {
-			preempt_disable();
-			/* save vn_active, it's a universal truth! */
-			vn_active = per_cpu(xfsstats, c).vn_active;
-			memset(&per_cpu(xfsstats, c), 0,
-			       sizeof(struct xfsstats));
-			per_cpu(xfsstats, c).vn_active = vn_active;
-			preempt_enable();
-		}
+		xfs_stats_clearall(xfsstats.xs_stats);
 		xfs_stats_clear = 0;
 	}
 
diff --git a/fs/xfs/xfs_sysfs.c b/fs/xfs/xfs_sysfs.c
index aa03670..ee70f5d 100644
--- a/fs/xfs/xfs_sysfs.c
+++ b/fs/xfs/xfs_sysfs.c
@@ -21,11 +21,13 @@
 #include "xfs_log_format.h"
 #include "xfs_log.h"
 #include "xfs_log_priv.h"
+#include "xfs_stats.h"
 
 struct xfs_sysfs_attr {
 	struct attribute attr;
-	ssize_t (*show)(char *buf, void *data);
-	ssize_t (*store)(const char *buf, size_t count, void *data);
+	ssize_t (*show)(struct kobject *kobject, char *buf);
+	ssize_t (*store)(struct kobject *kobject, const char *buf,
+			 size_t count);
 };
 
 static inline struct xfs_sysfs_attr *
@@ -38,6 +40,8 @@
 	static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_RW(name)
 #define XFS_SYSFS_ATTR_RO(name) \
 	static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_RO(name)
+#define XFS_SYSFS_ATTR_WO(name) \
+	static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_WO(name)
 
 #define ATTR_LIST(name) &xfs_sysfs_attr_##name.attr
 
@@ -51,14 +55,42 @@
 	.release = xfs_sysfs_release,
 };
 
+STATIC ssize_t
+xfs_sysfs_object_show(
+	struct kobject		*kobject,
+	struct attribute	*attr,
+	char			*buf)
+{
+	struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
+
+	return xfs_attr->show ? xfs_attr->show(kobject, buf) : 0;
+}
+
+STATIC ssize_t
+xfs_sysfs_object_store(
+	struct kobject		*kobject,
+	struct attribute	*attr,
+	const char		*buf,
+	size_t			count)
+{
+	struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
+
+	return xfs_attr->store ? xfs_attr->store(kobject, buf, count) : 0;
+}
+
+static const struct sysfs_ops xfs_sysfs_ops = {
+	.show = xfs_sysfs_object_show,
+	.store = xfs_sysfs_object_store,
+};
+
 #ifdef DEBUG
 /* debug */
 
 STATIC ssize_t
 log_recovery_delay_store(
+	struct kobject	*kobject,
 	const char	*buf,
-	size_t		count,
-	void		*data)
+	size_t		count)
 {
 	int		ret;
 	int		val;
@@ -77,8 +109,8 @@
 
 STATIC ssize_t
 log_recovery_delay_show(
-	char	*buf,
-	void	*data)
+	struct kobject	*kobject,
+	char		*buf)
 {
 	return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.log_recovery_delay);
 }
@@ -89,52 +121,87 @@
 	NULL,
 };
 
-STATIC ssize_t
-xfs_dbg_show(
-	struct kobject		*kobject,
-	struct attribute	*attr,
-	char			*buf)
-{
-	struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
-
-	return xfs_attr->show ? xfs_attr->show(buf, NULL) : 0;
-}
-
-STATIC ssize_t
-xfs_dbg_store(
-	struct kobject		*kobject,
-	struct attribute	*attr,
-	const char		*buf,
-	size_t			count)
-{
-	struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
-
-	return xfs_attr->store ? xfs_attr->store(buf, count, NULL) : 0;
-}
-
-static struct sysfs_ops xfs_dbg_ops = {
-	.show = xfs_dbg_show,
-	.store = xfs_dbg_store,
-};
-
 struct kobj_type xfs_dbg_ktype = {
 	.release = xfs_sysfs_release,
-	.sysfs_ops = &xfs_dbg_ops,
+	.sysfs_ops = &xfs_sysfs_ops,
 	.default_attrs = xfs_dbg_attrs,
 };
 
 #endif /* DEBUG */
 
+/* stats */
+
+static inline struct xstats *
+to_xstats(struct kobject *kobject)
+{
+	struct xfs_kobj *kobj = to_kobj(kobject);
+
+	return container_of(kobj, struct xstats, xs_kobj);
+}
+
+STATIC ssize_t
+stats_show(
+	struct kobject	*kobject,
+	char		*buf)
+{
+	struct xstats	*stats = to_xstats(kobject);
+
+	return xfs_stats_format(stats->xs_stats, buf);
+}
+XFS_SYSFS_ATTR_RO(stats);
+
+STATIC ssize_t
+stats_clear_store(
+	struct kobject	*kobject,
+	const char	*buf,
+	size_t		count)
+{
+	int		ret;
+	int		val;
+	struct xstats	*stats = to_xstats(kobject);
+
+	ret = kstrtoint(buf, 0, &val);
+	if (ret)
+		return ret;
+
+	if (val != 1)
+		return -EINVAL;
+
+	xfs_stats_clearall(stats->xs_stats);
+	return count;
+}
+XFS_SYSFS_ATTR_WO(stats_clear);
+
+static struct attribute *xfs_stats_attrs[] = {
+	ATTR_LIST(stats),
+	ATTR_LIST(stats_clear),
+	NULL,
+};
+
+struct kobj_type xfs_stats_ktype = {
+	.release = xfs_sysfs_release,
+	.sysfs_ops = &xfs_sysfs_ops,
+	.default_attrs = xfs_stats_attrs,
+};
+
 /* xlog */
 
+static inline struct xlog *
+to_xlog(struct kobject *kobject)
+{
+	struct xfs_kobj *kobj = to_kobj(kobject);
+
+	return container_of(kobj, struct xlog, l_kobj);
+}
+
 STATIC ssize_t
 log_head_lsn_show(
-	char	*buf,
-	void	*data)
+	struct kobject	*kobject,
+	char		*buf)
 {
-	struct xlog *log = data;
 	int cycle;
 	int block;
+	struct xlog *log = to_xlog(kobject);
 
 	spin_lock(&log->l_icloglock);
 	cycle = log->l_curr_cycle;
@@ -147,12 +214,12 @@
 
 STATIC ssize_t
 log_tail_lsn_show(
-	char	*buf,
-	void	*data)
+	struct kobject	*kobject,
+	char		*buf)
 {
-	struct xlog *log = data;
 	int cycle;
 	int block;
+	struct xlog *log = to_xlog(kobject);
 
 	xlog_crack_atomic_lsn(&log->l_tail_lsn, &cycle, &block);
 	return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, block);
@@ -161,12 +228,13 @@
 
 STATIC ssize_t
 reserve_grant_head_show(
-	char	*buf,
-	void	*data)
+	struct kobject	*kobject,
+	char		*buf)
+
 {
-	struct xlog *log = data;
 	int cycle;
 	int bytes;
+	struct xlog *log = to_xlog(kobject);
 
 	xlog_crack_grant_head(&log->l_reserve_head.grant, &cycle, &bytes);
 	return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, bytes);
@@ -175,12 +243,12 @@
 
 STATIC ssize_t
 write_grant_head_show(
-	char	*buf,
-	void	*data)
+	struct kobject	*kobject,
+	char		*buf)
 {
-	struct xlog *log = data;
 	int cycle;
 	int bytes;
+	struct xlog *log = to_xlog(kobject);
 
 	xlog_crack_grant_head(&log->l_write_head.grant, &cycle, &bytes);
 	return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, bytes);
@@ -195,45 +263,8 @@
 	NULL,
 };
 
-static inline struct xlog *
-to_xlog(struct kobject *kobject)
-{
-	struct xfs_kobj *kobj = to_kobj(kobject);
-	return container_of(kobj, struct xlog, l_kobj);
-}
-
-STATIC ssize_t
-xfs_log_show(
-	struct kobject		*kobject,
-	struct attribute	*attr,
-	char			*buf)
-{
-	struct xlog *log = to_xlog(kobject);
-	struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
-
-	return xfs_attr->show ? xfs_attr->show(buf, log) : 0;
-}
-
-STATIC ssize_t
-xfs_log_store(
-	struct kobject		*kobject,
-	struct attribute	*attr,
-	const char		*buf,
-	size_t			count)
-{
-	struct xlog *log = to_xlog(kobject);
-	struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
-
-	return xfs_attr->store ? xfs_attr->store(buf, count, log) : 0;
-}
-
-static struct sysfs_ops xfs_log_ops = {
-	.show = xfs_log_show,
-	.store = xfs_log_store,
-};
-
 struct kobj_type xfs_log_ktype = {
 	.release = xfs_sysfs_release,
-	.sysfs_ops = &xfs_log_ops,
+	.sysfs_ops = &xfs_sysfs_ops,
 	.default_attrs = xfs_log_attrs,
 };
diff --git a/fs/xfs/xfs_sysfs.h b/fs/xfs/xfs_sysfs.h
index 240eee3..be692e5 100644
--- a/fs/xfs/xfs_sysfs.h
+++ b/fs/xfs/xfs_sysfs.h
@@ -22,6 +22,7 @@
 extern struct kobj_type xfs_mp_ktype;	/* xfs_mount */
 extern struct kobj_type xfs_dbg_ktype;	/* debug */
 extern struct kobj_type xfs_log_ktype;	/* xlog */
+extern struct kobj_type xfs_stats_ktype;	/* stats */
 
 static inline struct xfs_kobj *
 to_kobj(struct kobject *kobject)
diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h
index c53beda..877079eb 100644
--- a/fs/xfs/xfs_trace.h
+++ b/fs/xfs/xfs_trace.h
@@ -1313,6 +1313,7 @@
 DEFINE_SIMPLE_IO_EVENT(xfs_unwritten_convert);
 DEFINE_SIMPLE_IO_EVENT(xfs_get_blocks_notfound);
 DEFINE_SIMPLE_IO_EVENT(xfs_setfilesize);
+DEFINE_SIMPLE_IO_EVENT(xfs_zero_eof);
 
 DECLARE_EVENT_CLASS(xfs_itrunc_class,
 	TP_PROTO(struct xfs_inode *ip, xfs_fsize_t new_size),
diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c
index a0ab1da..748b16a 100644
--- a/fs/xfs/xfs_trans.c
+++ b/fs/xfs/xfs_trans.c
@@ -930,9 +930,9 @@
 	 */
 	if (sync) {
 		error = _xfs_log_force_lsn(mp, commit_lsn, XFS_LOG_SYNC, NULL);
-		XFS_STATS_INC(xs_trans_sync);
+		XFS_STATS_INC(mp, xs_trans_sync);
 	} else {
-		XFS_STATS_INC(xs_trans_async);
+		XFS_STATS_INC(mp, xs_trans_async);
 	}
 
 	return error;
@@ -955,7 +955,7 @@
 	xfs_trans_free_items(tp, NULLCOMMITLSN, !!error);
 	xfs_trans_free(tp);
 
-	XFS_STATS_INC(xs_trans_empty);
+	XFS_STATS_INC(mp, xs_trans_empty);
 	return error;
 }
 
diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c
index 1098cf4..aa67339 100644
--- a/fs/xfs/xfs_trans_ail.c
+++ b/fs/xfs/xfs_trans_ail.c
@@ -349,7 +349,7 @@
 	     xfs_ail_min_lsn(ailp))) {
 		ailp->xa_log_flush = 0;
 
-		XFS_STATS_INC(xs_push_ail_flush);
+		XFS_STATS_INC(mp, xs_push_ail_flush);
 		xfs_log_force(mp, XFS_LOG_SYNC);
 	}
 
@@ -371,7 +371,7 @@
 		goto out_done;
 	}
 
-	XFS_STATS_INC(xs_push_ail);
+	XFS_STATS_INC(mp, xs_push_ail);
 
 	lsn = lip->li_lsn;
 	while ((XFS_LSN_CMP(lip->li_lsn, target) <= 0)) {
@@ -385,7 +385,7 @@
 		lock_result = lip->li_ops->iop_push(lip, &ailp->xa_buf_list);
 		switch (lock_result) {
 		case XFS_ITEM_SUCCESS:
-			XFS_STATS_INC(xs_push_ail_success);
+			XFS_STATS_INC(mp, xs_push_ail_success);
 			trace_xfs_ail_push(lip);
 
 			ailp->xa_last_pushed_lsn = lsn;
@@ -403,7 +403,7 @@
 			 * re-try the flushing relatively soon if most of the
 			 * AIL is beeing flushed.
 			 */
-			XFS_STATS_INC(xs_push_ail_flushing);
+			XFS_STATS_INC(mp, xs_push_ail_flushing);
 			trace_xfs_ail_flushing(lip);
 
 			flushing++;
@@ -411,14 +411,14 @@
 			break;
 
 		case XFS_ITEM_PINNED:
-			XFS_STATS_INC(xs_push_ail_pinned);
+			XFS_STATS_INC(mp, xs_push_ail_pinned);
 			trace_xfs_ail_pinned(lip);
 
 			stuck++;
 			ailp->xa_log_flush++;
 			break;
 		case XFS_ITEM_LOCKED:
-			XFS_STATS_INC(xs_push_ail_locked);
+			XFS_STATS_INC(mp, xs_push_ail_locked);
 			trace_xfs_ail_locked(lip);
 
 			stuck++;
@@ -497,6 +497,7 @@
 	long		tout = 0;	/* milliseconds */
 
 	current->flags |= PF_MEMALLOC;
+	set_freezable();
 
 	while (!kthread_should_stop()) {
 		if (tout && tout <= 20)
diff --git a/fs/xfs/xfs_trans_inode.c b/fs/xfs/xfs_trans_inode.c
index 17280cd..b97f1df 100644
--- a/fs/xfs/xfs_trans_inode.c
+++ b/fs/xfs/xfs_trans_inode.c
@@ -108,6 +108,15 @@
 	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
 
 	/*
+	 * Record the specific change for fdatasync optimisation. This
+	 * allows fdatasync to skip log forces for inodes that are only
+	 * timestamp dirty. We do this before the change count so that
+	 * the core being logged in this case does not impact on fdatasync
+	 * behaviour.
+	 */
+	ip->i_itemp->ili_fsync_fields |= flags;
+
+	/*
 	 * First time we log the inode in a transaction, bump the inode change
 	 * counter if it is configured for this to occur. We don't use
 	 * inode_inc_version() because there is no need for extra locking around
diff --git a/fs/xfs/xfs_xattr.c b/fs/xfs/xfs_xattr.c
index c0368151..8294f86 100644
--- a/fs/xfs/xfs_xattr.c
+++ b/fs/xfs/xfs_xattr.c
@@ -53,11 +53,34 @@
 	return asize;
 }
 
+void
+xfs_forget_acl(
+	struct inode		*inode,
+	const char		*name,
+	int			xflags)
+{
+	/*
+	 * Invalidate any cached ACLs if the user has bypassed the ACL
+	 * interface. We don't validate the content whatsoever so it is caller
+	 * responsibility to provide data in valid format and ensure i_mode is
+	 * consistent.
+	 */
+	if (xflags & ATTR_ROOT) {
+#ifdef CONFIG_XFS_POSIX_ACL
+		if (!strcmp(name, SGI_ACL_FILE))
+			forget_cached_acl(inode, ACL_TYPE_ACCESS);
+		else if (!strcmp(name, SGI_ACL_DEFAULT))
+			forget_cached_acl(inode, ACL_TYPE_DEFAULT);
+#endif
+	}
+}
+
 static int
 xfs_xattr_set(struct dentry *dentry, const char *name, const void *value,
 		size_t size, int flags, int xflags)
 {
-	struct xfs_inode *ip = XFS_I(d_inode(dentry));
+	struct xfs_inode	*ip = XFS_I(d_inode(dentry));
+	int			error;
 
 	if (strcmp(name, "") == 0)
 		return -EINVAL;
@@ -70,8 +93,12 @@
 
 	if (!value)
 		return xfs_attr_remove(ip, (unsigned char *)name, xflags);
-	return xfs_attr_set(ip, (unsigned char *)name,
+	error = xfs_attr_set(ip, (unsigned char *)name,
 				(void *)value, size, xflags);
+	if (!error)
+		xfs_forget_acl(d_inode(dentry), name, xflags);
+
+	return error;
 }
 
 static const struct xattr_handler xfs_xattr_user_handler = {