From 7bc5c414fe6627ec518c82d154c796f0981f5b02 Mon Sep 17 00:00:00 2001
From: Abhijith Das <adas@redhat.com>
Date: Fri, 18 Jan 2008 14:06:37 -0600
Subject: [PATCH] [GFS2] Allow journal recovery on read-only mount
This patch allows gfs2 to perform journal recovery even if it is mounted
read-only. Strictly speaking, a read-only mount should not be writing to
the filesystem, but we do this only to perform journal recovery. A
read-only mount will fail if we don't recover the dirty journal. Also,
when gfs2 is used as a root filesystem, it will be mounted read-only
before being mounted read-write during the boot sequence. A failed
read-only mount will panic the machine during bootup.
Signed-off-by: Abhijith Das <adas@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
---
fs/gfs2/recovery.c | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)
diff --git a/fs/gfs2/recovery.c b/fs/gfs2/recovery.c
index 27c994f2d1f..b249e294a95 100644
--- a/fs/gfs2/recovery.c
+++ b/fs/gfs2/recovery.c
@@ -504,13 +504,21 @@ int gfs2_recover_journal(struct gfs2_jdesc *jd)
if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags))
ro = 1;
} else {
- if (sdp->sd_vfs->s_flags & MS_RDONLY)
- ro = 1;
+ if (sdp->sd_vfs->s_flags & MS_RDONLY) {
+ /* check if device itself is read-only */
+ ro = bdev_read_only(sdp->sd_vfs->s_bdev);
+ if (!ro) {
+ fs_info(sdp, "recovery required on "
+ "read-only filesystem.\n");
+ fs_info(sdp, "write access will be "
+ "enabled during recovery.\n");
+ }
+ }
}
if (ro) {
- fs_warn(sdp, "jid=%u: Can't replay: read-only FS\n",
- jd->jd_jid);
+ fs_warn(sdp, "jid=%u: Can't replay: read-only block "
+ "device\n", jd->jd_jid);
error = -EROFS;
goto fail_gunlock_tr;
}
--
2.41.3