Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/fs/xfs/libxfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c
index 081f46e..ac6cdca 100644
--- a/fs/xfs/libxfs/xfs_sb.c
+++ b/fs/xfs/libxfs/xfs_sb.c
@@ -10,26 +10,20 @@
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_bit.h"
-#include "xfs_sb.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
-#include "xfs_inode.h"
 #include "xfs_ialloc.h"
 #include "xfs_alloc.h"
 #include "xfs_error.h"
 #include "xfs_trace.h"
-#include "xfs_cksum.h"
 #include "xfs_trans.h"
 #include "xfs_buf_item.h"
 #include "xfs_bmap_btree.h"
 #include "xfs_alloc_btree.h"
-#include "xfs_ialloc_btree.h"
 #include "xfs_log.h"
 #include "xfs_rmap_btree.h"
-#include "xfs_bmap.h"
 #include "xfs_refcount_btree.h"
 #include "xfs_da_format.h"
-#include "xfs_da_btree.h"
+#include "xfs_health.h"
 
 /*
  * Physical superblock buffer manipulations. Shared with libxfs in userspace.
@@ -225,10 +219,11 @@
 	struct xfs_buf		*bp,
 	struct xfs_sb		*sbp)
 {
+	struct xfs_dsb		*dsb = XFS_BUF_TO_SBP(bp);
 	uint32_t		agcount = 0;
 	uint32_t		rem;
 
-	if (sbp->sb_magicnum != XFS_SB_MAGIC) {
+	if (!xfs_verify_magic(bp, dsb->sb_magicnum)) {
 		xfs_warn(mp, "bad magic number");
 		return -EWRONGFS;
 	}
@@ -684,7 +679,7 @@
 	struct xfs_buf		*bp)
 {
 	struct xfs_sb		sb;
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_dsb		*dsb = XFS_BUF_TO_SBP(bp);
 	int			error;
 
@@ -750,7 +745,7 @@
 	struct xfs_buf		*bp)
 {
 	struct xfs_sb		sb;
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_buf_log_item	*bip = bp->b_log_item;
 	int			error;
 
@@ -781,12 +776,14 @@
 
 const struct xfs_buf_ops xfs_sb_buf_ops = {
 	.name = "xfs_sb",
+	.magic = { cpu_to_be32(XFS_SB_MAGIC), cpu_to_be32(XFS_SB_MAGIC) },
 	.verify_read = xfs_sb_read_verify,
 	.verify_write = xfs_sb_write_verify,
 };
 
 const struct xfs_buf_ops xfs_sb_quiet_buf_ops = {
 	.name = "xfs_sb_quiet",
+	.magic = { cpu_to_be32(XFS_SB_MAGIC), cpu_to_be32(XFS_SB_MAGIC) },
 	.verify_read = xfs_sb_quiet_read_verify,
 	.verify_write = xfs_sb_write_verify,
 };
@@ -796,12 +793,14 @@
  *
  * Mount initialization code establishing various mount
  * fields from the superblock associated with the given
- * mount structure
+ * mount structure.
+ *
+ * Inode geometry are calculated in xfs_ialloc_setup_geometry.
  */
 void
 xfs_sb_mount_common(
-	struct xfs_mount *mp,
-	struct xfs_sb	*sbp)
+	struct xfs_mount	*mp,
+	struct xfs_sb		*sbp)
 {
 	mp->m_agfrotor = mp->m_agirotor = 0;
 	mp->m_maxagi = mp->m_sb.sb_agcount;
@@ -809,7 +808,6 @@
 	mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT;
 	mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT;
 	mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1;
-	mp->m_agino_log = sbp->sb_inopblog + sbp->sb_agblklog;
 	mp->m_blockmask = sbp->sb_blocksize - 1;
 	mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG;
 	mp->m_blockwmask = mp->m_blockwsize - 1;
@@ -819,11 +817,6 @@
 	mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2;
 	mp->m_alloc_mnr[1] = mp->m_alloc_mxr[1] / 2;
 
-	mp->m_inobt_mxr[0] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 1);
-	mp->m_inobt_mxr[1] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 0);
-	mp->m_inobt_mnr[0] = mp->m_inobt_mxr[0] / 2;
-	mp->m_inobt_mnr[1] = mp->m_inobt_mxr[1] / 2;
-
 	mp->m_bmap_dmxr[0] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 1);
 	mp->m_bmap_dmxr[1] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 0);
 	mp->m_bmap_dmnr[0] = mp->m_bmap_dmxr[0] / 2;
@@ -840,14 +833,6 @@
 	mp->m_refc_mnr[1] = mp->m_refc_mxr[1] / 2;
 
 	mp->m_bsize = XFS_FSB_TO_BB(mp, 1);
-	mp->m_ialloc_inos = max_t(uint16_t, XFS_INODES_PER_CHUNK,
-					sbp->sb_inopblock);
-	mp->m_ialloc_blks = mp->m_ialloc_inos >> sbp->sb_inopblog;
-
-	if (sbp->sb_spino_align)
-		mp->m_ialloc_min_blks = sbp->sb_spino_align;
-	else
-		mp->m_ialloc_min_blks = mp->m_ialloc_blks;
 	mp->m_alloc_set_aside = xfs_alloc_set_aside(mp);
 	mp->m_ag_max_usable = xfs_alloc_ag_max_usable(mp);
 }
@@ -874,7 +859,7 @@
 	uint64_t	bfreelst = 0;
 	uint64_t	btree = 0;
 	uint64_t	fdblocks;
-	int		error;
+	int		error = 0;
 
 	for (index = 0; index < agcount; index++) {
 		/*
@@ -902,7 +887,7 @@
 	/*
 	 * If the new summary counts are obviously incorrect, fail the
 	 * mount operation because that implies the AGFs are also corrupt.
-	 * Clear BAD_SUMMARY so that we don't unmount with a dirty log, which
+	 * Clear FS_COUNTERS so that we don't unmount with a dirty log, which
 	 * will prevent xfs_repair from fixing anything.
 	 */
 	if (fdblocks > sbp->sb_dblocks || ifree > ialloc) {
@@ -920,7 +905,7 @@
 
 	xfs_reinit_percpu_counters(mp);
 out:
-	mp->m_flags &= ~XFS_MOUNT_BAD_SUMMARY;
+	xfs_fs_mark_healthy(mp, XFS_SICK_FS_COUNTERS);
 	return error;
 }
 
@@ -935,7 +920,7 @@
 	struct xfs_trans	*tp)
 {
 	struct xfs_mount	*mp = tp->t_mountp;
-	struct xfs_buf		*bp = xfs_trans_getsb(tp, mp, 0);
+	struct xfs_buf		*bp = xfs_trans_getsb(tp, mp);
 
 	mp->m_sb.sb_icount = percpu_counter_sum(&mp->m_icount);
 	mp->m_sb.sb_ifree = percpu_counter_sum(&mp->m_ifree);
@@ -943,7 +928,7 @@
 
 	xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb);
 	xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF);
-	xfs_trans_log_buf(tp, bp, 0, sizeof(struct xfs_dsb));
+	xfs_trans_log_buf(tp, bp, 0, sizeof(struct xfs_dsb) - 1);
 }
 
 /*
@@ -1001,7 +986,7 @@
 
 		bp = xfs_buf_get(mp->m_ddev_targp,
 				 XFS_AG_DADDR(mp, agno, XFS_SB_DADDR),
-				 XFS_FSS_TO_BB(mp, 1), 0);
+				 XFS_FSS_TO_BB(mp, 1));
 		/*
 		 * If we get an error reading or writing alternate superblocks,
 		 * continue.  xfs_repair chooses the "best" superblock based
@@ -1065,7 +1050,7 @@
 	if (error)
 		return error;
 
-	bp = xfs_trans_getsb(tp, mp, 0);
+	bp = xfs_trans_getsb(tp, mp);
 	xfs_log_sb(tp);
 	xfs_trans_bhold(tp, bp);
 	xfs_trans_set_sync(tp);
@@ -1081,7 +1066,7 @@
 	return error;
 }
 
-int
+void
 xfs_fs_geometry(
 	struct xfs_sb		*sbp,
 	struct xfs_fsop_geom	*geo,
@@ -1105,17 +1090,18 @@
 	memcpy(geo->uuid, &sbp->sb_uuid, sizeof(sbp->sb_uuid));
 
 	if (struct_version < 2)
-		return 0;
+		return;
 
 	geo->sunit = sbp->sb_unit;
 	geo->swidth = sbp->sb_width;
 
 	if (struct_version < 3)
-		return 0;
+		return;
 
 	geo->version = XFS_FSOP_GEOM_VERSION;
 	geo->flags = XFS_FSOP_GEOM_FLAGS_NLINK |
-		     XFS_FSOP_GEOM_FLAGS_DIRV2;
+		     XFS_FSOP_GEOM_FLAGS_DIRV2 |
+		     XFS_FSOP_GEOM_FLAGS_EXTFLG;
 	if (xfs_sb_version_hasattr(sbp))
 		geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR;
 	if (xfs_sb_version_hasquota(sbp))
@@ -1124,8 +1110,6 @@
 		geo->flags |= XFS_FSOP_GEOM_FLAGS_IALIGN;
 	if (xfs_sb_version_hasdalign(sbp))
 		geo->flags |= XFS_FSOP_GEOM_FLAGS_DALIGN;
-	if (xfs_sb_version_hasextflgbit(sbp))
-		geo->flags |= XFS_FSOP_GEOM_FLAGS_EXTFLG;
 	if (xfs_sb_version_hassector(sbp))
 		geo->flags |= XFS_FSOP_GEOM_FLAGS_SECTOR;
 	if (xfs_sb_version_hasasciici(sbp))
@@ -1156,14 +1140,17 @@
 	geo->dirblocksize = xfs_dir2_dirblock_bytes(sbp);
 
 	if (struct_version < 4)
-		return 0;
+		return;
 
 	if (xfs_sb_version_haslogv2(sbp))
 		geo->flags |= XFS_FSOP_GEOM_FLAGS_LOGV2;
 
 	geo->logsunit = sbp->sb_logsunit;
 
-	return 0;
+	if (struct_version < 5)
+		return;
+
+	geo->version = XFS_FSOP_GEOM_VERSION_V5;
 }
 
 /* Read a secondary superblock. */