1 files changed, 121 insertions, 105 deletions

diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c
index 3a6ed426327..7928b9983c1 100644
--- a/fs/xfs/xfs_bmap.c
+++ b/fs/xfs/xfs_bmap.c
@@ -2691,7 +2691,7 @@ xfs_bmap_rtalloc(
 		 * Adjust the disk quota also. This was reserved
 		 * earlier.
 		 */
-		XFS_TRANS_MOD_DQUOT_BYINO(mp, ap->tp, ap->ip,
+		xfs_trans_mod_dquot_byino(ap->tp, ap->ip,
 			ap->wasdel ? XFS_TRANS_DQ_DELRTBCOUNT :
 					XFS_TRANS_DQ_RTBCOUNT, (long) ralen);
 	} else {
@@ -2995,7 +2995,7 @@ xfs_bmap_btalloc(
 		 * Adjust the disk quota also. This was reserved
 		 * earlier.
 		 */
-		XFS_TRANS_MOD_DQUOT_BYINO(mp, ap->tp, ap->ip,
+		xfs_trans_mod_dquot_byino(ap->tp, ap->ip,
 			ap->wasdel ? XFS_TRANS_DQ_DELBCOUNT :
 					XFS_TRANS_DQ_BCOUNT,
 			(long) args.len);
@@ -3066,7 +3066,7 @@ xfs_bmap_btree_to_extents(
 		return error;
 	xfs_bmap_add_free(cbno, 1, cur->bc_private.b.flist, mp);
 	ip->i_d.di_nblocks--;
-	XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, XFS_TRANS_DQ_BCOUNT, -1L);
+	xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, -1L);
 	xfs_trans_binval(tp, cbp);
 	if (cur->bc_bufs[0] == cbp)
 		cur->bc_bufs[0] = NULL;
@@ -3386,7 +3386,7 @@ xfs_bmap_del_extent(
 	 * Adjust quota data.
 	 */
 	if (qfield)
-		XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, qfield, (long)-nblks);
+		xfs_trans_mod_dquot_byino(tp, ip, qfield, (long)-nblks);
 
 	/*
 	 * Account for change in delayed indirect blocks.
@@ -3523,7 +3523,7 @@ xfs_bmap_extents_to_btree(
 	*firstblock = cur->bc_private.b.firstblock = args.fsbno;
 	cur->bc_private.b.allocated++;
 	ip->i_d.di_nblocks++;
-	XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, XFS_TRANS_DQ_BCOUNT, 1L);
+	xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, 1L);
 	abp = xfs_btree_get_bufl(mp, tp, args.fsbno, 0);
 	/*
 	 * Fill in the child block.
@@ -3690,7 +3690,7 @@ xfs_bmap_local_to_extents(
 		XFS_BMAP_TRACE_POST_UPDATE("new", ip, 0, whichfork);
 		XFS_IFORK_NEXT_SET(ip, whichfork, 1);
 		ip->i_d.di_nblocks = 1;
-		XFS_TRANS_MOD_DQUOT_BYINO(args.mp, tp, ip,
+		xfs_trans_mod_dquot_byino(tp, ip,
 			XFS_TRANS_DQ_BCOUNT, 1L);
 		flags |= xfs_ilog_fext(whichfork);
 	} else {
@@ -4048,7 +4048,7 @@ xfs_bmap_add_attrfork(
 			XFS_TRANS_PERM_LOG_RES, XFS_ADDAFORK_LOG_COUNT)))
 		goto error0;
 	xfs_ilock(ip, XFS_ILOCK_EXCL);
-	error = XFS_TRANS_RESERVE_QUOTA_NBLKS(mp, tp, ip, blks, 0, rsvd ?
+	error = xfs_trans_reserve_quota_nblks(tp, ip, blks, 0, rsvd ?
 			XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_FORCE_RES :
 			XFS_QMOPT_RES_REGBLKS);
 	if (error) {
@@ -4983,10 +4983,11 @@ xfs_bmapi(
 				 * adjusted later.  We return if we haven't
 				 * allocated blocks already inside this loop.
 				 */
-				if ((error = XFS_TRANS_RESERVE_QUOTA_NBLKS(
-						mp, NULL, ip, (long)alen, 0,
+				error = xfs_trans_reserve_quota_nblks(
+						NULL, ip, (long)alen, 0,
 						rt ? XFS_QMOPT_RES_RTBLKS :
-						     XFS_QMOPT_RES_REGBLKS))) {
+						     XFS_QMOPT_RES_REGBLKS);
+				if (error) {
 					if (n == 0) {
 						*nmap = 0;
 						ASSERT(cur == NULL);
@@ -5035,8 +5036,8 @@ xfs_bmapi(
 					if (XFS_IS_QUOTA_ON(mp))
 						/* unreserve the blocks now */
 						(void)
-						XFS_TRANS_UNRESERVE_QUOTA_NBLKS(
-							mp, NULL, ip,
+						xfs_trans_unreserve_quota_nblks(
+							NULL, ip,
 							(long)alen, 0, rt ?
 							XFS_QMOPT_RES_RTBLKS :
 							XFS_QMOPT_RES_REGBLKS);
@@ -5691,14 +5692,14 @@ xfs_bunmapi(
 				do_div(rtexts, mp->m_sb.sb_rextsize);
 				xfs_mod_incore_sb(mp, XFS_SBS_FREXTENTS,
 						(int64_t)rtexts, rsvd);
-				(void)XFS_TRANS_RESERVE_QUOTA_NBLKS(mp,
-					NULL, ip, -((long)del.br_blockcount), 0,
+				(void)xfs_trans_reserve_quota_nblks(NULL,
+					ip, -((long)del.br_blockcount), 0,
 					XFS_QMOPT_RES_RTBLKS);
 			} else {
 				xfs_mod_incore_sb(mp, XFS_SBS_FDBLOCKS,
 						(int64_t)del.br_blockcount, rsvd);
-				(void)XFS_TRANS_RESERVE_QUOTA_NBLKS(mp,
-					NULL, ip, -((long)del.br_blockcount), 0,
+				(void)xfs_trans_reserve_quota_nblks(NULL,
+					ip, -((long)del.br_blockcount), 0,
 					XFS_QMOPT_RES_REGBLKS);
 			}
 			ip->i_delayed_blks -= del.br_blockcount;
@@ -5880,7 +5881,7 @@ xfs_getbmap(
 	void			*arg)		/* formatter arg */
 {
 	__int64_t		bmvend;		/* last block requested */
-	int			error;		/* return value */
+	int			error = 0;	/* return value */
 	__int64_t		fixlen;		/* length for -1 case */
 	int			i;		/* extent number */
 	int			lock;		/* lock state */
@@ -5890,39 +5891,18 @@ xfs_getbmap(
 	int			nexleft;	/* # of user extents left */
 	int			subnex;		/* # of bmapi's can do */
 	int			nmap;		/* number of map entries */
-	struct getbmapx		out;		/* output structure */
+	struct getbmapx		*out;		/* output structure */
 	int			whichfork;	/* data or attr fork */
 	int			prealloced;	/* this is a file with
 						 * preallocated data space */
 	int			iflags;		/* interface flags */
 	int			bmapi_flags;	/* flags for xfs_bmapi */
+	int			cur_ext = 0;
 
 	mp = ip->i_mount;
 	iflags = bmv->bmv_iflags;
-
 	whichfork = iflags & BMV_IF_ATTRFORK ? XFS_ATTR_FORK : XFS_DATA_FORK;
 
-	/*	If the BMV_IF_NO_DMAPI_READ interface bit specified, do not
-	 *	generate a DMAPI read event.  Otherwise, if the DM_EVENT_READ
-	 *	bit is set for the file, generate a read event in order
-	 *	that the DMAPI application may do its thing before we return
-	 *	the extents.  Usually this means restoring user file data to
-	 *	regions of the file that look like holes.
-	 *
-	 *	The "old behavior" (from XFS_IOC_GETBMAP) is to not specify
-	 *	BMV_IF_NO_DMAPI_READ so that read events are generated.
-	 *	If this were not true, callers of ioctl( XFS_IOC_GETBMAP )
-	 *	could misinterpret holes in a DMAPI file as true holes,
-	 *	when in fact they may represent offline user data.
-	 */
-	if ((iflags & BMV_IF_NO_DMAPI_READ) == 0 &&
-	    DM_EVENT_ENABLED(ip, DM_EVENT_READ) &&
-	    whichfork == XFS_DATA_FORK) {
-		error = XFS_SEND_DATA(mp, DM_EVENT_READ, ip, 0, 0, 0, NULL);
-		if (error)
-			return XFS_ERROR(error);
-	}
-
 	if (whichfork == XFS_ATTR_FORK) {
 		if (XFS_IFORK_Q(ip)) {
 			if (ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS &&
@@ -5936,11 +5916,37 @@ xfs_getbmap(
 					 ip->i_mount);
 			return XFS_ERROR(EFSCORRUPTED);
 		}
-	} else if (ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS &&
-		   ip->i_d.di_format != XFS_DINODE_FMT_BTREE &&
-		   ip->i_d.di_format != XFS_DINODE_FMT_LOCAL)
-		return XFS_ERROR(EINVAL);
-	if (whichfork == XFS_DATA_FORK) {
+
+		prealloced = 0;
+		fixlen = 1LL << 32;
+	} else {
+		/*
+		 * If the BMV_IF_NO_DMAPI_READ interface bit specified, do
+		 * not generate a DMAPI read event.  Otherwise, if the
+		 * DM_EVENT_READ bit is set for the file, generate a read
+		 * event in order that the DMAPI application may do its thing
+		 * before we return the extents.  Usually this means restoring
+		 * user file data to regions of the file that look like holes.
+		 *
+		 * The "old behavior" (from XFS_IOC_GETBMAP) is to not specify
+		 * BMV_IF_NO_DMAPI_READ so that read events are generated.
+		 * If this were not true, callers of ioctl(XFS_IOC_GETBMAP)
+		 * could misinterpret holes in a DMAPI file as true holes,
+		 * when in fact they may represent offline user data.
+		 */
+		if (DM_EVENT_ENABLED(ip, DM_EVENT_READ) &&
+		    !(iflags & BMV_IF_NO_DMAPI_READ)) {
+			error = XFS_SEND_DATA(mp, DM_EVENT_READ, ip,
+					      0, 0, 0, NULL);
+			if (error)
+				return XFS_ERROR(error);
+		}
+
+		if (ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS &&
+		    ip->i_d.di_format != XFS_DINODE_FMT_BTREE &&
+		    ip->i_d.di_format != XFS_DINODE_FMT_LOCAL)
+			return XFS_ERROR(EINVAL);
+
 		if (xfs_get_extsz_hint(ip) ||
 		    ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC|XFS_DIFLAG_APPEND)){
 			prealloced = 1;
@@ -5949,42 +5955,41 @@ xfs_getbmap(
 			prealloced = 0;
 			fixlen = ip->i_size;
 		}
-	} else {
-		prealloced = 0;
-		fixlen = 1LL << 32;
 	}
 
 	if (bmv->bmv_length == -1) {
 		fixlen = XFS_FSB_TO_BB(mp, XFS_B_TO_FSB(mp, fixlen));
-		bmv->bmv_length = MAX( (__int64_t)(fixlen - bmv->bmv_offset),
-					(__int64_t)0);
-	} else if (bmv->bmv_length < 0)
-		return XFS_ERROR(EINVAL);
-	if (bmv->bmv_length == 0) {
+		bmv->bmv_length =
+			max_t(__int64_t, fixlen - bmv->bmv_offset, 0);
+	} else if (bmv->bmv_length == 0) {
 		bmv->bmv_entries = 0;
 		return 0;
+	} else if (bmv->bmv_length < 0) {
+		return XFS_ERROR(EINVAL);
 	}
+
 	nex = bmv->bmv_count - 1;
 	if (nex <= 0)
 		return XFS_ERROR(EINVAL);
 	bmvend = bmv->bmv_offset + bmv->bmv_length;
 
-	xfs_ilock(ip, XFS_IOLOCK_SHARED);
 
-	if (((iflags & BMV_IF_DELALLOC) == 0) &&
-	    (whichfork == XFS_DATA_FORK) &&
-	    (ip->i_delayed_blks || ip->i_size > ip->i_d.di_size)) {
-		/* xfs_fsize_t last_byte = xfs_file_last_byte(ip); */
-		error = xfs_flush_pages(ip, (xfs_off_t)0,
-					       -1, 0, FI_REMAPF);
-		if (error) {
-			xfs_iunlock(ip, XFS_IOLOCK_SHARED);
-		return error;
+	if (bmv->bmv_count > ULONG_MAX / sizeof(struct getbmapx))
+		return XFS_ERROR(ENOMEM);
+	out = kmem_zalloc(bmv->bmv_count * sizeof(struct getbmapx), KM_MAYFAIL);
+	if (!out)
+		return XFS_ERROR(ENOMEM);
+
+	xfs_ilock(ip, XFS_IOLOCK_SHARED);
+	if (whichfork == XFS_DATA_FORK && !(iflags & BMV_IF_DELALLOC)) {
+		if (ip->i_delayed_blks || ip->i_size > ip->i_d.di_size) {
+			error = xfs_flush_pages(ip, 0, -1, 0, FI_REMAPF);
+			if (error)
+				goto out_unlock_iolock;
 		}
-	}
 
-	ASSERT(whichfork == XFS_ATTR_FORK || (iflags & BMV_IF_DELALLOC) ||
-	       ip->i_delayed_blks == 0);
+		ASSERT(ip->i_delayed_blks == 0);
+	}
 
 	lock = xfs_ilock_map_shared(ip);
 
@@ -5995,23 +6000,25 @@ xfs_getbmap(
 	if (nex > XFS_IFORK_NEXTENTS(ip, whichfork) * 2 + 1)
 		nex = XFS_IFORK_NEXTENTS(ip, whichfork) * 2 + 1;
 
-	bmapi_flags = xfs_bmapi_aflag(whichfork) |
-			((iflags & BMV_IF_PREALLOC) ? 0 : XFS_BMAPI_IGSTATE);
+	bmapi_flags = xfs_bmapi_aflag(whichfork);
+	if (!(iflags & BMV_IF_PREALLOC))
+		bmapi_flags |= XFS_BMAPI_IGSTATE;
 
 	/*
 	 * Allocate enough space to handle "subnex" maps at a time.
 	 */
+	error = ENOMEM;
 	subnex = 16;
-	map = kmem_alloc(subnex * sizeof(*map), KM_SLEEP);
+	map = kmem_alloc(subnex * sizeof(*map), KM_MAYFAIL);
+	if (!map)
+		goto out_unlock_ilock;
 
 	bmv->bmv_entries = 0;
 
-	if ((XFS_IFORK_NEXTENTS(ip, whichfork) == 0)) {
-		if (((iflags & BMV_IF_DELALLOC) == 0) ||
-		    whichfork == XFS_ATTR_FORK) {
-			error = 0;
-			goto unlock_and_return;
-		}
+	if (XFS_IFORK_NEXTENTS(ip, whichfork) == 0 &&
+	    (whichfork == XFS_ATTR_FORK || !(iflags & BMV_IF_DELALLOC))) {
+		error = 0;
+		goto out_free_map;
 	}
 
 	nexleft = nex;
@@ -6023,54 +6030,63 @@ xfs_getbmap(
 				  bmapi_flags, NULL, 0, map, &nmap,
 				  NULL, NULL);
 		if (error)
-			goto unlock_and_return;
+			goto out_free_map;
 		ASSERT(nmap <= subnex);
 
 		for (i = 0; i < nmap && nexleft && bmv->bmv_length; i++) {
-			out.bmv_oflags = 0;
+			out[cur_ext].bmv_oflags = 0;
 			if (map[i].br_state == XFS_EXT_UNWRITTEN)
-				out.bmv_oflags |= BMV_OF_PREALLOC;
+				out[cur_ext].bmv_oflags |= BMV_OF_PREALLOC;
 			else if (map[i].br_startblock == DELAYSTARTBLOCK)
-				out.bmv_oflags |= BMV_OF_DELALLOC;
-			out.bmv_offset = XFS_FSB_TO_BB(mp, map[i].br_startoff);
-			out.bmv_length = XFS_FSB_TO_BB(mp, map[i].br_blockcount);
-			out.bmv_unused1 = out.bmv_unused2 = 0;
+				out[cur_ext].bmv_oflags |= BMV_OF_DELALLOC;
+			out[cur_ext].bmv_offset =
+				XFS_FSB_TO_BB(mp, map[i].br_startoff);
+			out[cur_ext].bmv_length =
+				XFS_FSB_TO_BB(mp, map[i].br_blockcount);
+			out[cur_ext].bmv_unused1 = 0;
+			out[cur_ext].bmv_unused2 = 0;
 			ASSERT(((iflags & BMV_IF_DELALLOC) != 0) ||
 			      (map[i].br_startblock != DELAYSTARTBLOCK));
                         if (map[i].br_startblock == HOLESTARTBLOCK &&
 			    whichfork == XFS_ATTR_FORK) {
 				/* came to the end of attribute fork */
-				out.bmv_oflags |= BMV_OF_LAST;
-				goto unlock_and_return;
-			} else {
-				int full = 0;	/* user array is full */
-
-				if (!xfs_getbmapx_fix_eof_hole(ip, &out,
-							prealloced, bmvend,
-							map[i].br_startblock)) {
-					goto unlock_and_return;
-				}
-
-				/* format results & advance arg */
-				error = formatter(&arg, &out, &full);
-				if (error || full)
-					goto unlock_and_return;
-				nexleft--;
-				bmv->bmv_offset =
-					out.bmv_offset + out.bmv_length;
-				bmv->bmv_length = MAX((__int64_t)0,
-					(__int64_t)(bmvend - bmv->bmv_offset));
-				bmv->bmv_entries++;
+				out[cur_ext].bmv_oflags |= BMV_OF_LAST;
+				goto out_free_map;
 			}
+
+			if (!xfs_getbmapx_fix_eof_hole(ip, &out[cur_ext],
+					prealloced, bmvend,
+					map[i].br_startblock))
+				goto out_free_map;
+
+			nexleft--;
+			bmv->bmv_offset =
+				out[cur_ext].bmv_offset +
+				out[cur_ext].bmv_length;
+			bmv->bmv_length =
+				max_t(__int64_t, 0, bmvend - bmv->bmv_offset);
+			bmv->bmv_entries++;
+			cur_ext++;
 		}
 	} while (nmap && nexleft && bmv->bmv_length);
 
-unlock_and_return:
+ out_free_map:
+	kmem_free(map);
+ out_unlock_ilock:
 	xfs_iunlock_map_shared(ip, lock);
+ out_unlock_iolock:
 	xfs_iunlock(ip, XFS_IOLOCK_SHARED);
 
-	kmem_free(map);
+	for (i = 0; i < cur_ext; i++) {
+		int full = 0;	/* user array is full */
+
+		/* format results & advance arg */
+		error = formatter(&arg, &out[i], &full);
+		if (error || full)
+			break;
+	}
 
+	kmem_free(out);
 	return error;
 }