mirror of
https://github.com/koverstreet/bcachefs-tools.git
synced 2025-02-09 00:00:04 +03:00
134 lines
2.6 KiB
C
134 lines
2.6 KiB
C
/*
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* Code for sending uevent notifications to user-space.
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*
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* Copyright 2015 Datera, Inc.
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*/
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#include "bcache.h"
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#include "notify.h"
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#include <linux/kobject.h>
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#define notify_var(c, format, ...) \
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({ \
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int ret; \
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lockdep_assert_held(&(c)->uevent_lock); \
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ret = add_uevent_var(&(c)->uevent_env, format, ##__VA_ARGS__); \
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WARN_ON_ONCE(ret); \
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})
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static void notify_get(struct cache_set *c)
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{
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struct kobj_uevent_env *env = &c->uevent_env;
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mutex_lock(&c->uevent_lock);
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env->envp_idx = 0;
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env->buflen = 0;
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notify_var(c, "SET_UUID=%pU", c->disk_sb.user_uuid.b);
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}
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static void notify_get_cache(struct cache *ca)
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{
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struct cache_set *c = ca->set;
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char buf[BDEVNAME_SIZE];
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notify_get(c);
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notify_var(c, "UUID=%pU", ca->disk_sb.sb->disk_uuid.b);
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notify_var(c, "BLOCKDEV=%s", bdevname(ca->disk_sb.bdev, buf));
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}
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static void notify_put(struct cache_set *c)
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{
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struct kobj_uevent_env *env = &c->uevent_env;
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env->envp[env->envp_idx] = NULL;
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kobject_uevent_env(&c->kobj, KOBJ_CHANGE, env->envp);
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mutex_unlock(&c->uevent_lock);
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}
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void bch_notify_cache_set_read_write(struct cache_set *c)
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{
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notify_get(c);
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notify_var(c, "STATE=active");
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notify_put(c);
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}
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void bch_notify_cache_set_read_only(struct cache_set *c)
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{
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notify_get(c);
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notify_var(c, "STATE=readonly");
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notify_put(c);
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}
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void bch_notify_cache_set_stopped(struct cache_set *c)
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{
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notify_get(c);
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notify_var(c, "STATE=stopped");
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notify_put(c);
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}
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void bch_notify_cache_read_write(struct cache *ca)
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{
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struct cache_set *c = ca->set;
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notify_get_cache(ca);
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notify_var(c, "STATE=active");
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notify_put(c);
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}
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void bch_notify_cache_read_only(struct cache *ca)
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{
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struct cache_set *c = ca->set;
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notify_get_cache(ca);
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notify_var(c, "STATE=readonly");
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notify_put(c);
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}
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void bch_notify_cache_added(struct cache *ca)
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{
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struct cache_set *c = ca->set;
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notify_get_cache(ca);
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notify_var(c, "STATE=removing");
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notify_put(c);
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}
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void bch_notify_cache_removing(struct cache *ca)
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{
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struct cache_set *c = ca->set;
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notify_get_cache(ca);
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notify_var(c, "STATE=removing");
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notify_put(c);
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}
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void bch_notify_cache_remove_failed(struct cache *ca)
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{
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struct cache_set *c = ca->set;
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notify_get_cache(ca);
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notify_var(c, "STATE=remove_failed");
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notify_put(c);
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}
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void bch_notify_cache_removed(struct cache *ca)
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{
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struct cache_set *c = ca->set;
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notify_get_cache(ca);
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notify_var(c, "STATE=removed");
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notify_put(c);
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}
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void bch_notify_cache_error(struct cache *ca, bool fatal)
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{
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struct cache_set *c = ca->set;
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notify_get_cache(ca);
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notify_var(c, "STATE=error");
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notify_var(c, "FATAL=%d", fatal);
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notify_put(c);
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}
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