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merge _target_*register_events

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introduce _create_dm_event_handler()
This commit is contained in:
Alasdair Kergon 2007-01-17 15:00:57 +00:00
parent c63c19a73e
commit 0e2084da9c
1 changed files with 46 additions and 58 deletions
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104
lib/mirror/mirrored.c
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@ -368,7 +368,7 @@ static int _mirrored_target_present(const struct lv_segment *seg __attribute((un
} }
#ifdef DMEVENTD #ifdef DMEVENTD
static int _setup_registration(struct cmd_context *cmd, char **dso) static int _get_mirror_dso_path(struct cmd_context *cmd, char **dso)
{ {
char *path; char *path;
const char *libpath; const char *libpath;
@ -388,6 +388,29 @@ static int _setup_registration(struct cmd_context *cmd, char **dso)
return 1; return 1;
} }
static struct dm_event_handler *_create_dm_event_handler(const char *dmname,
const char *dso,
enum dm_event_mask mask)
{
struct dm_event_handler *dmevh;
if (!(dmevh = dm_event_handler_create()))
return_0;
if (dm_event_handler_set_dso(dmevh, dso))
goto fail;
if (dm_event_handler_set_dev_name(dmevh, dmname))
goto fail;
dm_event_handler_set_event_mask(dmevh, mask);
return dmevh;
fail:
dm_event_handler_destroy(dmevh);
return NULL;
}
static int _target_registered(struct lv_segment *seg, int *pending) static int _target_registered(struct lv_segment *seg, int *pending)
{ {
char *dso, *name; char *dso, *name;
@ -400,21 +423,15 @@ static int _target_registered(struct lv_segment *seg, int *pending)
vg = lv->vg; vg = lv->vg;
*pending = 0; *pending = 0;
if (!_setup_registration(vg->cmd, &dso)) { if (!_get_mirror_dso_path(vg->cmd, &dso))
stack; return_0;
return 0;
}
if (!(name = build_dm_name(vg->cmd->mem, vg->name, lv->name, NULL))) if (!(name = build_dm_name(vg->cmd->mem, vg->name, lv->name, NULL)))
return_0; return_0;
if (!(dmevh = dm_event_handler_create())) if (!(dmevh = _create_dm_event_handler(name, dso, DM_EVENT_ALL_ERRORS)))
return_0; return_0;
dm_event_handler_set_dso(dmevh, dso);
dm_event_handler_set_dev_name(dmevh, name);
dm_event_handler_set_event_mask(dmevh, DM_EVENT_ALL_ERRORS);
if (dm_event_get_registered_device(dmevh, 0)) { if (dm_event_get_registered_device(dmevh, 0)) {
dm_event_handler_destroy(dmevh); dm_event_handler_destroy(dmevh);
return 0; return 0;
@ -432,79 +449,50 @@ static int _target_registered(struct lv_segment *seg, int *pending)
} }
/* FIXME This gets run while suspended and performs banned operations. */ /* FIXME This gets run while suspended and performs banned operations. */
/* FIXME Merge these two functions */ static int _target_set_events(struct cmd_context *cmd,
static int _target_register_events(struct cmd_context *cmd,
struct lv_segment *seg, struct lv_segment *seg,
int evmask) int evmask, int set)
{ {
char *dso, *name; char *dso, *name;
struct logical_volume *lv; struct logical_volume *lv;
struct volume_group *vg; struct volume_group *vg;
struct dm_event_handler *dmevh; struct dm_event_handler *dmevh;
int r;
lv = seg->lv; lv = seg->lv;
vg = lv->vg; vg = lv->vg;
if (!_setup_registration(cmd, &dso)) { if (!_get_mirror_dso_path(cmd, &dso))
stack; return_0;
return 0;
}
if (!(name = build_dm_name(cmd->mem, vg->name, lv->name, NULL))) if (!(name = build_dm_name(cmd->mem, vg->name, lv->name, NULL)))
return_0; return_0;
if (!(dmevh = dm_event_handler_create())) if (!(dmevh = _create_dm_event_handler(name, dso, DM_EVENT_ALL_ERRORS)))
return_0; return_0;
dm_event_handler_set_dso(dmevh, dso); r = set ? dm_event_register_handler(dmevh) : dm_event_unregister_handler(dmevh);
dm_event_handler_set_dev_name(dmevh, name);
dm_event_handler_set_event_mask(dmevh, DM_EVENT_ALL_ERRORS);
if (!dm_event_register_handler(dmevh)) {
dm_event_handler_destroy(dmevh);
return_0;
}
dm_event_handler_destroy(dmevh); dm_event_handler_destroy(dmevh);
if (!r)
return_0;
log_info("Registered %s for events", name); log_info("%s %s for events", set ? "Registered" : "Unregistered", name);
return 1; return 1;
} }
static int _target_register_events(struct cmd_context *cmd,
struct lv_segment *seg,
int events)
{
return _target_set_events(cmd, seg, events, 1);
}
static int _target_unregister_events(struct cmd_context *cmd, static int _target_unregister_events(struct cmd_context *cmd,
struct lv_segment *seg, struct lv_segment *seg,
int evmask) int events)
{ {
char *dso; return _target_set_events(cmd, seg, events, 0);
char *name;
struct logical_volume *lv;
struct volume_group *vg;
struct dm_event_handler *dmevh;
lv = seg->lv;
vg = lv->vg;
/* FIXME Remove this and use handle to avoid config file race */
if (!_setup_registration(cmd, &dso))
return_0;
if (!(name = build_dm_name(cmd->mem, vg->name, lv->name, NULL)))
return_0;
if (!(dmevh = dm_event_handler_create()))
return_0;
dm_event_handler_set_dso(dmevh, dso);
dm_event_handler_set_dev_name(dmevh, name);
dm_event_handler_set_event_mask(dmevh, DM_EVENT_ALL_ERRORS);
if (!dm_event_unregister_handler(dmevh)) {
dm_event_handler_destroy(dmevh);
return_0;
}
dm_event_handler_destroy(dmevh);
log_info("Unregistered %s for events", name);
return 1;
} }
#endif /* DMEVENTD */ #endif /* DMEVENTD */