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GFS2: Add some useful messages

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The following patch adds a message to indicate when barriers have been
disabled due to a block device which doesn't support them. You could
already tell this via the mount options in /proc/mounts, but all the
other filesystems also log a message at the same time.

Also, the same mechanisms are used to indicate when the lock
demote interface has been used (only ever used for debugging)
which is a request from our support team.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Steven Whitehouse 2010-05-06 11:03:29 +01:00
parent ad6bb90f34
commit 913a71d250
4 changed files with 6 additions and 1 deletions
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1
fs/gfs2/incore.h
View File

@ -459,6 +459,7 @@ enum {
SDF_SHUTDOWN = 2,
SDF_NOBARRIERS = 3,
SDF_NORECOVERY = 4,
SDF_DEMOTE = 5,
};
#define GFS2_FSNAME_LEN 256

1
fs/gfs2/log.c
View File

@ -600,6 +600,7 @@ static void log_write_header(struct gfs2_sbd *sdp, u32 flags, int pull)
if (buffer_eopnotsupp(bh)) {
clear_buffer_eopnotsupp(bh);
set_buffer_uptodate(bh);
fs_info(sdp, "barrier sync failed - disabling barriers\n");
set_bit(SDF_NOBARRIERS, &sdp->sd_flags);
lock_buffer(bh);
skip_barrier:

3
fs/gfs2/super.c
View File

@ -1334,7 +1334,8 @@ static int gfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
}
if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags))
seq_printf(s, ",nobarrier");
if (test_bit(SDF_DEMOTE, &sdp->sd_flags))
seq_printf(s, ",demote_interface_used");
return 0;
}

2
fs/gfs2/sys.c
View File

@ -233,6 +233,8 @@ static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len
glops = gfs2_glops_list[gltype];
if (glops == NULL)
return -EINVAL;
if (test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags))
fs_info(sdp, "demote interface used\n");
rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl);
if (rv)
return rv;