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ceph: reset osd after relevant messages timed out

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This simplifies the process of timing out messages. We
keep lru of current messages that are in flight. If a
timeout has passed, we reset the osd connection, so that
messages will be retransmitted.  This is a failsafe in case
we hit some sort of problem sending out message to the OSD.
Normally, we'll get notification via an updated osdmap if
there are problems.

If a request is older than the keepalive timeout, send a
keepalive to ensure we detect any breaks in the TCP connection.

Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Yehuda Sadeh
2010-02-26 15:32:31 -08:00
committed by Sage Weil
parent e9964c1023
commit 422d2cb8f9
4 changed files with 113 additions and 57 deletions
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8
fs/ceph/super.c
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@@ -292,6 +292,7 @@ enum {
Opt_wsize,
Opt_rsize,
Opt_osdtimeout,
Opt_osdkeepalivetimeout,
Opt_mount_timeout,
Opt_osd_idle_ttl,
Opt_caps_wanted_delay_min,
@@ -322,6 +323,7 @@ static match_table_t arg_tokens = {
{Opt_wsize, "wsize=%d"},
{Opt_rsize, "rsize=%d"},
{Opt_osdtimeout, "osdtimeout=%d"},
{Opt_osdkeepalivetimeout, "osdkeepalive=%d"},
{Opt_mount_timeout, "mount_timeout=%d"},
{Opt_osd_idle_ttl, "osd_idle_ttl=%d"},
{Opt_caps_wanted_delay_min, "caps_wanted_delay_min=%d"},
@@ -367,7 +369,8 @@ static struct ceph_mount_args *parse_mount_args(int flags, char *options,
/* start with defaults */
args->sb_flags = flags;
args->flags = CEPH_OPT_DEFAULT;
args->osd_timeout = 5; /* seconds */
args->osd_timeout = CEPH_OSD_TIMEOUT_DEFAULT;
args->osd_keepalive_timeout = CEPH_OSD_KEEPALIVE_DEFAULT;
args->mount_timeout = CEPH_MOUNT_TIMEOUT_DEFAULT; /* seconds */
args->osd_idle_ttl = CEPH_OSD_IDLE_TTL_DEFAULT; /* seconds */
args->caps_wanted_delay_min = CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT;
@@ -468,6 +471,9 @@ static struct ceph_mount_args *parse_mount_args(int flags, char *options,
case Opt_osdtimeout:
args->osd_timeout = intval;
break;
case Opt_osdkeepalivetimeout:
args->osd_keepalive_timeout = intval;
break;
case Opt_mount_timeout:
args->mount_timeout = intval;
break;