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106 lines
3.0 KiB
106 lines
3.0 KiB
4 years ago
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From 0e81250e5125dc664e1938288e47ff52b1cacbe4 Mon Sep 17 00:00:00 2001
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From: "Darrick J. Wong" <darrick.wong@oracle.com>
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Date: Fri, 26 Apr 2019 15:40:28 -0500
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Subject: [PATCH] xfs_db: metadump should handle symlinks properly
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Remote symlink target blocks are multi-fsb objects on XFS v5 filesystems
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because we only write one rmt header per data fork extent. For fs
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blocksize >= 2048 we never have more than one block and therefore nobody
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noticed, but for blocksize == 1024 this is definitely not true and leads
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to metadump spraying error messages about symlink block crc errors.
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Therefore, reformulate the symlink metadump into a multi-fsb dump
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function.
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Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
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Reviewed-by: Eric Sandeen <sandeen@redhat.com>
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[sandeen: shrink the map declaration]
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Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
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---
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db/metadump.c | 43 ++++++++++++++++++++++++++++++++++++-------
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1 file changed, 36 insertions(+), 7 deletions(-)
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Index: xfsprogs-4.5.0/db/metadump.c
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===================================================================
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--- xfsprogs-4.5.0.orig/db/metadump.c
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+++ xfsprogs-4.5.0/db/metadump.c
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@@ -1425,11 +1425,34 @@ process_dir_data_block(
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}
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}
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-static void
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+static int
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process_symlink_block(
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- char *block)
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+ xfs_fileoff_t o,
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+ xfs_fsblock_t s,
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+ xfs_filblks_t c,
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+ typnm_t btype,
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+ xfs_fileoff_t last)
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{
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- char *link = block;
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+ struct bbmap map;
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+ char *link;
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+ int ret = 0;
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+
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+ push_cur();
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+ map.nmaps = 1;
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+ map.b[0].bm_bn = XFS_FSB_TO_DADDR(mp, s);
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+ map.b[0].bm_len = XFS_FSB_TO_BB(mp, c);
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+ set_cur(&typtab[btype], 0, 0, DB_RING_IGN, &map);
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+ if (!iocur_top->data) {
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+ xfs_agnumber_t agno = XFS_FSB_TO_AGNO(mp, s);
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+ xfs_agblock_t agbno = XFS_FSB_TO_AGBNO(mp, s);
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+
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+ print_warning("cannot read %s block %u/%u (%llu)",
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+ typtab[btype].name, agno, agbno, s);
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+ if (stop_on_read_error)
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+ ret = -1;
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+ goto out_pop;
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+ }
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+ link = iocur_top->data;
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if (xfs_sb_version_hascrc(&(mp)->m_sb))
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link += sizeof(struct xfs_dsymlink_hdr);
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@@ -1447,6 +1470,12 @@ process_symlink_block(
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if (zlen < mp->m_sb.sb_blocksize)
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memset(link + linklen, 0, zlen);
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}
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+
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+ iocur_top->need_crc = 1;
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+ ret = write_buf(iocur_top);
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+out_pop:
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+ pop_cur();
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+ return ret;
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}
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#define MAX_REMOTE_VALS 4095
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@@ -1663,10 +1692,6 @@ process_single_fsb_objects(
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last == mp->m_dir_geo->fsbcount);
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iocur_top->need_crc = 1;
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break;
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- case TYP_SYMLINK:
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- process_symlink_block(dp);
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- iocur_top->need_crc = 1;
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- break;
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case TYP_ATTR:
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process_attr_block(dp, o);
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iocur_top->need_crc = 1;
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@@ -1764,6 +1789,8 @@ is_multi_fsb_object(
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{
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if (btype == TYP_DIR2 && mp->m_dir_geo->fsbcount > 1)
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return true;
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+ if (btype == TYP_SYMLINK)
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+ return true;
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return false;
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}
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@@ -1778,6 +1805,8 @@ process_multi_fsb_objects(
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switch (btype) {
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case TYP_DIR2:
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return process_multi_fsb_dir(o, s, c, btype, last);
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+ case TYP_SYMLINK:
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+ return process_symlink_block(o, s, c, btype, last);
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default:
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print_warning("bad type for multi-fsb object %d", btype);
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return -EINVAL;
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