From e84718ec0a40ebb2babc7f5c791a4eacbf475912 Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Mon, 28 Oct 2024 17:03:31 -0700 Subject: [PATCH] xfs_db: support passing the realtime device to the debugger Create a new -R flag so that sysadmins can pass the realtime device to the xfs debugger. Since we can now have superblocks on the rt device, we need this to be able to inspect/dump/etc. Signed-off-by: Darrick J. Wong Reviewed-by: Christoph Hellwig --- db/init.c | 7 +++++-- db/io.c | 28 +++++++++++++++++++++++----- db/io.h | 2 ++ db/xfs_admin.sh | 4 +++- man/man8/xfs_db.8 | 13 +++++++++++++ 5 files changed, 46 insertions(+), 8 deletions(-) diff --git a/db/init.c b/db/init.c index cea25ae52..17fb09429 100644 --- a/db/init.c +++ b/db/init.c @@ -33,7 +33,7 @@ static void usage(void) { fprintf(stderr, _( - "Usage: %s [-ifFrxV] [-p prog] [-l logdev] [-c cmd]... device\n" + "Usage: %s [-ifFrxV] [-p prog] [-l logdev] [-R rtdev] [-c cmd]... device\n" ), progname); exit(1); } @@ -54,7 +54,7 @@ init( textdomain(PACKAGE); progname = basename(argv[0]); - while ((c = getopt(argc, argv, "c:fFip:rxVl:")) != EOF) { + while ((c = getopt(argc, argv, "c:fFip:rR:xVl:")) != EOF) { switch (c) { case 'c': cmdline = xrealloc(cmdline, (ncmdline+1)*sizeof(char*)); @@ -75,6 +75,9 @@ init( case 'r': x.flags = LIBXFS_ISREADONLY; break; + case 'R': + x.rt.name = optarg; + break; case 'l': x.log.name = optarg; break; diff --git a/db/io.c b/db/io.c index 9b2c6b4cf..26b8e78c2 100644 --- a/db/io.c +++ b/db/io.c @@ -458,6 +458,7 @@ ring_add(void) static void write_cur_buf(void) { + struct xfs_buftarg *btp = iocur_top->bp->b_target; int ret; ret = -libxfs_bwrite(iocur_top->bp); @@ -465,7 +466,7 @@ write_cur_buf(void) dbprintf(_("write error: %s\n"), strerror(ret)); /* re-read buffer from disk */ - ret = -libxfs_readbufr(mp->m_ddev_targp, iocur_top->bb, iocur_top->bp, + ret = -libxfs_readbufr(btp, iocur_top->bb, iocur_top->bp, iocur_top->blen, 0); if (ret != 0) dbprintf(_("read error: %s\n"), strerror(ret)); @@ -474,6 +475,7 @@ write_cur_buf(void) static void write_cur_bbs(void) { + struct xfs_buftarg *btp = iocur_top->bp->b_target; int ret; ret = -libxfs_bwrite(iocur_top->bp); @@ -482,7 +484,7 @@ write_cur_bbs(void) /* re-read buffer from disk */ - ret = -libxfs_readbufr_map(mp->m_ddev_targp, iocur_top->bp, 0); + ret = -libxfs_readbufr_map(btp, iocur_top->bp, 0); if (ret != 0) dbprintf(_("read error: %s\n"), strerror(ret)); } @@ -541,9 +543,9 @@ static void __set_cur( struct xfs_buftarg *btargp, const typ_t *type, - xfs_daddr_t blknum, - int len, - int ring_flag, + xfs_daddr_t blknum, + int len, + int ring_flag, bbmap_t *bbmap) { struct xfs_buf *bp; @@ -647,6 +649,22 @@ set_log_cur( __set_cur(mp->m_logdev_targp, type, blknum, len, ring_flag, bbmap); } +int +set_rt_cur( + const typ_t *type, + xfs_daddr_t blknum, + int len, + int ring_flag, + bbmap_t *bbmap) +{ + if (!mp->m_rtdev_targp->bt_bdev) { + printf(_("realtime device not loaded, use -R.\n")); + return ENODEV; + } + + __set_cur(mp->m_rtdev_targp, type, blknum, len, ring_flag, bbmap); + return 0; +} void set_iocur_type( diff --git a/db/io.h b/db/io.h index f48b67b47..cece66a1c 100644 --- a/db/io.h +++ b/db/io.h @@ -51,6 +51,8 @@ extern void set_cur(const struct typ *type, xfs_daddr_t blknum, int len, int ring_add, bbmap_t *bbmap); extern void set_log_cur(const struct typ *type, xfs_daddr_t blknum, int len, int ring_add, bbmap_t *bbmap); +int set_rt_cur(const struct typ *type, xfs_daddr_t blknum, + int len, int ring_add, bbmap_t *bbmap); extern void ring_add(void); extern void set_iocur_type(const struct typ *type); extern void xfs_dummy_verify(struct xfs_buf *bp); diff --git a/db/xfs_admin.sh b/db/xfs_admin.sh index cc650c425..52a658ba4 100755 --- a/db/xfs_admin.sh +++ b/db/xfs_admin.sh @@ -8,6 +8,7 @@ status=0 require_offline="" require_online="" DB_OPTS="" +DB_DEV_OPTS="" REPAIR_OPTS="" IO_OPTS="" REPAIR_DEV_OPTS="" @@ -42,6 +43,7 @@ do require_offline=1 ;; r) REPAIR_DEV_OPTS=" -r '$OPTARG'" + DB_DEV_OPTS=" -R '$OPTARG'" require_offline=1 ;; u) DB_OPTS=$DB_OPTS" -r -c uuid" @@ -89,7 +91,7 @@ case $# in if [ -n "$DB_OPTS" ] then - eval xfs_db -x -p xfs_admin $LOG_OPTS $DB_OPTS "$1" + eval xfs_db -x -p xfs_admin $LOG_OPTS $DB_DEV_OPTS $DB_OPTS "$1" status=$? fi if [ -n "$REPAIR_OPTS" ] diff --git a/man/man8/xfs_db.8 b/man/man8/xfs_db.8 index 291ec1c58..5faf8dbb1 100644 --- a/man/man8/xfs_db.8 +++ b/man/man8/xfs_db.8 @@ -14,6 +14,9 @@ xfs_db \- debug an XFS filesystem .B \-l .I logdev ] [ +.B \-R +.I rtdev +] [ .B \-p .I progname ] @@ -80,6 +83,16 @@ Set the program name to for prompts and some error messages, the default value is .BR xfs_db . .TP +.B -R +.I rtdev +Specifies the device where the realtime data resides. +This is only relevant for filesystems that have a realtime section. +See the +.BR mkfs.xfs "(8) " \-r +option, and refer to +.BR xfs (5) +for a detailed description of the XFS realtime section. +.TP .B -r Open .I device -- 2.39.5