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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/fs/xfs/scrub/rtbitmap.c
..
..
@@ -9,19 +9,13 @@
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9
 #include "xfs_format.h"
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10
 #include "xfs_trans_resv.h"
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11
 #include "xfs_mount.h"
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-#include "xfs_defer.h"
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-#include "xfs_btree.h"
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-#include "xfs_bit.h"
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12
 #include "xfs_log_format.h"
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13
 #include "xfs_trans.h"
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-#include "xfs_sb.h"
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-#include "xfs_alloc.h"
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 #include "xfs_rtalloc.h"
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15
 #include "xfs_inode.h"
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-#include "scrub/xfs_scrub.h"
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+#include "xfs_bmap.h"
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 #include "scrub/scrub.h"
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18
 #include "scrub/common.h"
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-#include "scrub/trace.h"
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19
 
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 /* Set us up with the realtime metadata locked. */
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21
 int
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..
@@ -65,6 +59,41 @@
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 	return 0;
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 }
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61
 
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+/* Make sure the entire rtbitmap file is mapped with written extents. */
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+STATIC int
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+xchk_rtbitmap_check_extents(
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+	struct xfs_scrub	*sc)
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+{
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+	struct xfs_mount	*mp = sc->mp;
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+	struct xfs_bmbt_irec	map;
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+	xfs_rtblock_t		off;
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+	int			nmap;
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+	int			error = 0;
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+
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+	for (off = 0; off < mp->m_sb.sb_rbmblocks;) {
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+		if (xchk_should_terminate(sc, &error) ||
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+		    (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
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+			break;
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+
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+		/* Make sure we have a written extent. */
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+		nmap = 1;
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+		error = xfs_bmapi_read(mp->m_rbmip, off,
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+				mp->m_sb.sb_rbmblocks - off, &map, &nmap,
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+				XFS_DATA_FORK);
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+		if (!xchk_fblock_process_error(sc, XFS_DATA_FORK, off, &error))
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+			break;
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+
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+		if (nmap != 1 || !xfs_bmap_is_written_extent(&map)) {
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+			xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, off);
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+			break;
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+		}
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+
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+		off += map.br_blockcount;
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+	}
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+
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+	return error;
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+}
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+
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 /* Scrub the realtime bitmap. */
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98
 int
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99
 xchk_rtbitmap(
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..
@@ -72,8 +101,19 @@
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 {
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102
 	int			error;
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103
 
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+	/* Is the size of the rtbitmap correct? */
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+	if (sc->mp->m_rbmip->i_d.di_size !=
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+	    XFS_FSB_TO_B(sc->mp, sc->mp->m_sb.sb_rbmblocks)) {
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+		xchk_ino_set_corrupt(sc, sc->mp->m_rbmip->i_ino);
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+		return 0;
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+	}
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+
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111
 	/* Invoke the fork scrubber. */
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112
 	error = xchk_metadata_inode_forks(sc);
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+	if (error || (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
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+		return error;
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+
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+	error = xchk_rtbitmap_check_extents(sc);
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117
 	if (error || (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
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118
 		return error;
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119
 
..
..
@@ -141,9 +181,8 @@
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 	startext = fsbno;
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182
 	endext = fsbno + len - 1;
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183
 	do_div(startext, sc->mp->m_sb.sb_rextsize);
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-	if (do_div(endext, sc->mp->m_sb.sb_rextsize))
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-		endext++;
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-	extcount = endext - startext;
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+	do_div(endext, sc->mp->m_sb.sb_rextsize);
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+	extcount = endext - startext + 1;
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186
 	xfs_ilock(sc->mp->m_rbmip, XFS_ILOCK_SHARED | XFS_ILOCK_RTBITMAP);
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187
 	error = xfs_rtalloc_extent_is_free(sc->mp, sc->tp, startext, extcount,
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188
 			&is_free);