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From: "Darrick J. Wong" <djwong@kernel.org>
To: sandeen@sandeen.net, djwong@kernel.org
Cc: Christoph Hellwig <hch@lst.de>, Brian Foster <bfoster@redhat.com>,
	linux-xfs@vger.kernel.org, bfoster@redhat.com
Subject: [PATCH 08/11] xfs_repair: allow setting the needsrepair flag
Date: Thu, 11 Feb 2021 14:59:46 -0800
Message-ID: <161308438691.3850286.3501696811159590596.stgit@magnolia> (raw)
In-Reply-To: <161308434132.3850286.13801623440532587184.stgit@magnolia>

From: Darrick J. Wong <djwong@kernel.org>

Quietly set up the ability to tell xfs_repair to set NEEDSREPAIR at
program start and (presumably) clear it by the end of the run.  This
code isn't terribly useful to users; it's mainly here so that fstests
can exercise the functionality.  We don't document this flag in the
manual pages at all because repair clears needsrepair at exit, which
means the knobs only exist for fstests to exercise the functionality.

Note that we can't do any of these upgrades until we've at least done a
preliminary scan of the primary super and the log.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
---
 repair/globals.c    |    2 ++
 repair/globals.h    |    2 ++
 repair/phase2.c     |   63 +++++++++++++++++++++++++++++++++++++++++++++++++++
 repair/xfs_repair.c |    9 +++++++
 4 files changed, 76 insertions(+)


diff --git a/repair/globals.c b/repair/globals.c
index 110d98b6..699a96ee 100644
--- a/repair/globals.c
+++ b/repair/globals.c
@@ -49,6 +49,8 @@ int	rt_spec;		/* Realtime dev specified as option */
 int	convert_lazy_count;	/* Convert lazy-count mode on/off */
 int	lazy_count;		/* What to set if to if converting */
 
+bool	add_needsrepair;	/* forcibly set needsrepair while repairing */
+
 /* misc status variables */
 
 int	primary_sb_modified;
diff --git a/repair/globals.h b/repair/globals.h
index 1d397b35..043b3e8e 100644
--- a/repair/globals.h
+++ b/repair/globals.h
@@ -90,6 +90,8 @@ extern int	rt_spec;		/* Realtime dev specified as option */
 extern int	convert_lazy_count;	/* Convert lazy-count mode on/off */
 extern int	lazy_count;		/* What to set if to if converting */
 
+extern bool	add_needsrepair;
+
 /* misc status variables */
 
 extern int		primary_sb_modified;
diff --git a/repair/phase2.c b/repair/phase2.c
index 952ac4a5..9a8d42e1 100644
--- a/repair/phase2.c
+++ b/repair/phase2.c
@@ -131,6 +131,63 @@ zero_log(
 		libxfs_max_lsn = log->l_last_sync_lsn;
 }
 
+static bool
+set_needsrepair(
+	struct xfs_mount	*mp)
+{
+	if (!xfs_sb_version_hascrc(&mp->m_sb)) {
+		printf(
+	_("needsrepair flag only supported on V5 filesystems.\n"));
+		exit(0);
+	}
+
+	if (xfs_sb_version_needsrepair(&mp->m_sb)) {
+		printf(_("Filesystem already marked as needing repair.\n"));
+		exit(0);
+	}
+
+	printf(_("Marking filesystem in need of repair.\n"));
+	mp->m_sb.sb_features_incompat |= XFS_SB_FEAT_INCOMPAT_NEEDSREPAIR;
+	return true;
+}
+
+/* Perform the user's requested upgrades on filesystem. */
+static void
+upgrade_filesystem(
+	struct xfs_mount	*mp)
+{
+	struct xfs_buf		*bp;
+	bool			dirty = false;
+	int			error;
+
+	if (add_needsrepair)
+		dirty |= set_needsrepair(mp);
+
+        if (no_modify || !dirty)
+                return;
+
+        bp = libxfs_getsb(mp);
+        if (!bp || bp->b_error) {
+                do_error(
+	_("couldn't get superblock for feature upgrade, err=%d\n"),
+                                bp ? bp->b_error : ENOMEM);
+        } else {
+                libxfs_sb_to_disk(bp->b_addr, &mp->m_sb);
+
+                /*
+		 * Write the primary super to disk immediately so that
+		 * needsrepair will be set if repair doesn't complete.
+		 */
+                error = -libxfs_bwrite(bp);
+                if (error)
+                        do_error(
+	_("filesystem feature upgrade failed, err=%d\n"),
+                                        error);
+        }
+        if (bp)
+                libxfs_buf_relse(bp);
+}
+
 /*
  * ok, at this point, the fs is mounted but the root inode may be
  * trashed and the ag headers haven't been checked.  So we have
@@ -235,4 +292,10 @@ phase2(
 				do_warn(_("would correct\n"));
 		}
 	}
+
+	/*
+	 * Upgrade the filesystem now that we've done a preliminary check of
+	 * the superblocks, the AGs, the log, and the metadata inodes.
+	 */
+	upgrade_filesystem(mp);
 }
diff --git a/repair/xfs_repair.c b/repair/xfs_repair.c
index 90d1a95a..a613505f 100644
--- a/repair/xfs_repair.c
+++ b/repair/xfs_repair.c
@@ -65,11 +65,13 @@ static char *o_opts[] = {
  */
 enum c_opt_nums {
 	CONVERT_LAZY_COUNT = 0,
+	CONVERT_NEEDSREPAIR,
 	C_MAX_OPTS,
 };
 
 static char *c_opts[] = {
 	[CONVERT_LAZY_COUNT]	= "lazycount",
+	[CONVERT_NEEDSREPAIR]	= "needsrepair",
 	[C_MAX_OPTS]		= NULL,
 };
 
@@ -302,6 +304,13 @@ process_args(int argc, char **argv)
 					lazy_count = (int)strtol(val, NULL, 0);
 					convert_lazy_count = 1;
 					break;
+				case CONVERT_NEEDSREPAIR:
+					if (!val)
+						do_abort(
+		_("-c needsrepair requires a parameter\n"));
+					if (strtol(val, NULL, 0) == 1)
+						add_needsrepair = true;
+					break;
 				default:
 					unknown('c', val);
 					break;


  parent reply index

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-11 22:59 [PATCHSET v5 00/11] xfs: add the ability to flag a fs for repair Darrick J. Wong
2021-02-11 22:59 ` [PATCH 01/11] xfs_admin: clean up string quoting Darrick J. Wong
2021-02-11 23:08   ` Chaitanya Kulkarni
2021-02-11 22:59 ` [PATCH 02/11] xfs_admin: support filesystems with realtime devices Darrick J. Wong
2021-02-11 23:08   ` Chaitanya Kulkarni
2021-02-11 22:59 ` [PATCH 03/11] xfs_db: report the needsrepair flag in check and version commands Darrick J. Wong
2021-02-11 22:59 ` [PATCH 04/11] xfs_db: don't allow label/uuid setting if the needsrepair flag is set Darrick J. Wong
2021-02-11 22:59 ` [PATCH 05/11] xfs_repair: fix unmount error message to have a newline Darrick J. Wong
2021-02-11 23:12   ` Chaitanya Kulkarni
2021-02-11 22:59 ` [PATCH 06/11] xfs_repair: clear quota CHKD flags on the incore superblock too Darrick J. Wong
2021-02-11 22:59 ` [PATCH 07/11] xfs_repair: clear the needsrepair flag Darrick J. Wong
2021-02-11 22:59 ` Darrick J. Wong [this message]
2021-02-11 23:29   ` [PATCH 08/11] xfs_repair: allow setting " Eric Sandeen
2021-02-12  0:17     ` Darrick J. Wong
2021-02-12  0:20       ` Eric Sandeen
2021-02-12  1:26         ` Darrick J. Wong
2021-02-12  4:35       ` Darrick J. Wong
2021-02-12 13:35       ` Brian Foster
2021-02-12 18:54         ` Darrick J. Wong
2021-02-11 22:59 ` [PATCH 09/11] xfs_repair: add a testing hook for NEEDSREPAIR Darrick J. Wong
2021-02-11 22:59 ` [PATCH 10/11] xfs_admin: support adding features to V5 filesystems Darrick J. Wong
2021-02-11 23:00 ` [PATCH 11/11] man: mark all deprecated V4 format options Darrick J. Wong

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