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lvmlockd: enable lockopt nodelay for lockstart

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Avoid the sanlock add_lockspace delay in vgchange --lockstart
by adding --lockopt nodelay.  This is for testing, and is not
safe to use in general.
This commit is contained in:
David Teigland 2024-10-24 17:13:33 -05:00
parent 77332669d0
commit 875012fb5d
5 changed files with 33 additions and 11 deletions
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11
daemons/lvmlockd/lvmlockd-core.c
View File

@ -1062,14 +1062,14 @@ static int lm_prepare_lockspace(struct lockspace *ls, struct action *act)
return rv;
}
static int lm_add_lockspace(struct lockspace *ls, struct action *act, int adopt_only, int adopt_ok)
static int lm_add_lockspace(struct lockspace *ls, struct action *act, int adopt_only, int adopt_ok, int nodelay)
{
int rv;
if (ls->lm_type == LD_LM_DLM)
rv = lm_add_lockspace_dlm(ls, adopt_only, adopt_ok);
else if (ls->lm_type == LD_LM_SANLOCK)
rv = lm_add_lockspace_sanlock(ls, adopt_only, adopt_ok);
rv = lm_add_lockspace_sanlock(ls, adopt_only, adopt_ok, nodelay);
else if (ls->lm_type == LD_LM_IDM)
rv = lm_add_lockspace_idm(ls, adopt_only, adopt_ok);
else
@ -2495,6 +2495,7 @@ static void *lockspace_thread_main(void *arg_in)
int adopt_only = 0;
int adopt_ok = 0;
int wait_flag = 0;
int nodelay = 0;
int retry;
int rv;
@ -2517,6 +2518,8 @@ static void *lockspace_thread_main(void *arg_in)
adopt_only = 1;
if (add_act->flags & LD_AF_ADOPT)
adopt_ok = 1;
if (add_act->flags & LD_AF_NODELAY)
nodelay = 1;
}
}
pthread_mutex_unlock(&ls->mutex);
@ -2546,7 +2549,7 @@ static void *lockspace_thread_main(void *arg_in)
* The actual lockspace join can take a while.
*/
if (!error) {
error = lm_add_lockspace(ls, add_act, adopt_only, adopt_ok);
error = lm_add_lockspace(ls, add_act, adopt_only, adopt_ok, nodelay);
log_debug("S %s lm_add_lockspace done %d", ls->name, error);
@ -4545,6 +4548,8 @@ static uint32_t str_to_opts(const char *str)
flags |= LD_AF_ENABLE;
if (strstr(str, "disable"))
flags |= LD_AF_DISABLE;
if (strstr(str, "nodelay"))
flags |= LD_AF_NODELAY;
/* FIXME: parse the flag values properly */
if (strstr(str, "adopt_only"))

5
daemons/lvmlockd/lvmlockd-internal.h
View File

@ -113,6 +113,7 @@ struct client {
#define LD_AF_LV_UNLOCK 0x00080000
#define LD_AF_SH_EXISTS 0x00100000
#define LD_AF_ADOPT_ONLY 0x00200000 /* adopt orphan or fail */
#define LD_AF_NODELAY 0x00400000
/*
* Number of times to repeat a lock request after
@ -510,7 +511,7 @@ int lm_init_lv_sanlock(struct lockspace *ls, char *lv_name, char *vg_args, char
int lm_free_lv_sanlock(struct lockspace *ls, struct resource *r);
int lm_rename_vg_sanlock(char *ls_name, char *vg_name, uint32_t flags, char *vg_args);
int lm_prepare_lockspace_sanlock(struct lockspace *ls);
int lm_add_lockspace_sanlock(struct lockspace *ls, int adopt_only, int adopt_ok);
int lm_add_lockspace_sanlock(struct lockspace *ls, int adopt_only, int adopt_ok, int nodelay);
int lm_rem_lockspace_sanlock(struct lockspace *ls, int free_vg);
int lm_lock_sanlock(struct lockspace *ls, struct resource *r, int ld_mode,
struct val_blk *vb_out, int *retry,
@ -561,7 +562,7 @@ static inline int lm_prepare_lockspace_sanlock(struct lockspace *ls)
return -1;
}
static inline int lm_add_lockspace_sanlock(struct lockspace *ls, int adopt_only, int adopt_ok)
static inline int lm_add_lockspace_sanlock(struct lockspace *ls, int adopt_only, int adopt_ok, int nodelay)
{
return -1;
}

11
daemons/lvmlockd/lvmlockd-sanlock.c
View File

@ -24,6 +24,9 @@
#include "sanlock_admin.h"
#include "sanlock_resource.h"
/* FIXME: copied from sanlock header until the sanlock update is more widespread */
#define SANLK_ADD_NODELAY 0x00000002
#include <stddef.h>
#include <poll.h>
#include <errno.h>
@ -1594,9 +1597,10 @@ fail:
return ret;
}
int lm_add_lockspace_sanlock(struct lockspace *ls, int adopt_only, int adopt_ok)
int lm_add_lockspace_sanlock(struct lockspace *ls, int adopt_only, int adopt_ok, int nodelay)
{
struct lm_sanlock *lms = (struct lm_sanlock *)ls->lm_data;
uint32_t flags = 0;
int rv;
if (daemon_test) {
@ -1604,7 +1608,10 @@ int lm_add_lockspace_sanlock(struct lockspace *ls, int adopt_only, int adopt_ok)
goto out;
}
rv = sanlock_add_lockspace_timeout(&lms->ss, 0, sanlock_io_timeout);
if (nodelay)
flags |= SANLK_ADD_NODELAY;
rv = sanlock_add_lockspace_timeout(&lms->ss, flags, sanlock_io_timeout);
if (rv == -EEXIST && (adopt_ok || adopt_only)) {
/* We could alternatively just skip the sanlock call for adopt. */
log_debug("S %s add_lockspace_san adopt found ls", ls->name);

16
lib/locking/lvmlockd.c
View File

@ -1407,6 +1407,7 @@ int lockd_start_vg(struct cmd_context *cmd, struct volume_group *vg, int *exists
{
char uuid[64] __attribute__((aligned(8)));
const char *opts = NULL;
char opt_buf[64] = {};
daemon_reply reply;
uint32_t lockd_flags = 0;
int host_id = 0;
@ -1428,10 +1429,15 @@ int lockd_start_vg(struct cmd_context *cmd, struct volume_group *vg, int *exists
return 0;
}
if (cmd->lockopt & LOCKOPT_ADOPTLS)
opts = "adopt_only";
else if (cmd->lockopt & LOCKOPT_ADOPT)
opts = "adopt";
if ((cmd->lockopt & LOCKOPT_NODELAY) ||
(cmd->lockopt & LOCKOPT_ADOPTLS) ||
(cmd->lockopt & LOCKOPT_ADOPT)) {
dm_snprintf(opt_buf, sizeof(opt_buf), "%s%s%s",
(cmd->lockopt & LOCKOPT_NODELAY) ? "nodelay," : "",
(cmd->lockopt & LOCKOPT_ADOPTLS) ? "adopt_only" : "",
(cmd->lockopt & LOCKOPT_ADOPT) ? "adopt" : "");
opts = opt_buf;
}
log_debug("lockd start VG %s lock_type %s",
vg->name, vg->lock_type ? vg->lock_type : "empty");
@ -3797,6 +3803,8 @@ void lockd_lockopt_get_flags(const char *str, uint32_t *flags)
*flags |= LOCKOPT_ADOPTLV;
else if (!strcmp(argv[i], "adopt"))
*flags |= LOCKOPT_ADOPT;
else if (!strcmp(argv[i], "nodelay"))
*flags |= LOCKOPT_NODELAY;
else
log_warn("Ignoring unknown lockopt value: %s", argv[i]);
}

1
lib/locking/lvmlockd.h
View File

@ -54,6 +54,7 @@
#define LOCKOPT_ADOPTVG 0x00000800
#define LOCKOPT_ADOPTLV 0x00001000
#define LOCKOPT_ADOPT 0x00002000
#define LOCKOPT_NODELAY 0x00004000
#ifdef LVMLOCKD_SUPPORT