GFS2: Add "-o errors=panic|withdraw" mount options
This patch adds "-o errors=panic" and "-o errors=withdraw" to the
gfs2 mount options. The "errors=withdraw" option is today's
current behaviour, meaning to withdraw from the file system if a
non-serious gfs2 error occurs. The new "errors=panic" option
tells gfs2 to force a kernel panic if a non-serious gfs2 file
system error occurs. This may be useful, for example, where
fabric-level fencing is used that has no way to reboot (such as
fence_scsi).
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index 85bd2bc..7a5c128 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -68,6 +68,8 @@
Opt_discard,
Opt_nodiscard,
Opt_commit,
+ Opt_err_withdraw,
+ Opt_err_panic,
Opt_error,
};
@@ -97,6 +99,8 @@
{Opt_discard, "discard"},
{Opt_nodiscard, "nodiscard"},
{Opt_commit, "commit=%d"},
+ {Opt_err_withdraw, "errors=withdraw"},
+ {Opt_err_panic, "errors=panic"},
{Opt_error, NULL}
};
@@ -152,6 +156,11 @@
args->ar_localcaching = 1;
break;
case Opt_debug:
+ if (args->ar_errors == GFS2_ERRORS_PANIC) {
+ fs_info(sdp, "-o debug and -o errors=panic "
+ "are mutually exclusive.\n");
+ return -EINVAL;
+ }
args->ar_debug = 1;
break;
case Opt_nodebug:
@@ -205,6 +214,17 @@
return rv ? rv : -EINVAL;
}
break;
+ case Opt_err_withdraw:
+ args->ar_errors = GFS2_ERRORS_WITHDRAW;
+ break;
+ case Opt_err_panic:
+ if (args->ar_debug) {
+ fs_info(sdp, "-o debug and -o errors=panic "
+ "are mutually exclusive.\n");
+ return -EINVAL;
+ }
+ args->ar_errors = GFS2_ERRORS_PANIC;
+ break;
case Opt_error:
default:
fs_info(sdp, "invalid mount option: %s\n", o);
@@ -1226,6 +1246,22 @@
lfsecs = sdp->sd_tune.gt_log_flush_secs;
if (lfsecs != 60)
seq_printf(s, ",commit=%d", lfsecs);
+ if (args->ar_errors != GFS2_ERRORS_DEFAULT) {
+ const char *state;
+
+ switch (args->ar_errors) {
+ case GFS2_ERRORS_WITHDRAW:
+ state = "withdraw";
+ break;
+ case GFS2_ERRORS_PANIC:
+ state = "panic";
+ break;
+ default:
+ state = "unknown";
+ break;
+ }
+ seq_printf(s, ",errors=%s", state);
+ }
return 0;
}