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Upstream: Add snapshot and zvol events

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For kernel to send snapshot mount/unmount events to zed.

For kernel to send symlink creates/removes on zvol plumbing.
(/dev/run/dsk/zvol/$pool/$zvol -> /dev/diskX)

If zed misses the ENODEV, all errors after are EINVAL. Treat any error
as kernel module failure.

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Jorgen Lundman <lundman@lundman.net>
Closes #12416
This commit is contained in:
Jorgen Lundman
2021-09-10 02:44:21 +09:00
committed by GitHub
parent 2079111f42
commit 5a54a4e051
8 changed files with 70 additions and 1 deletions
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module/zfs/zfs_fm.c
+52
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@@ -1444,6 +1444,58 @@ zfs_ereport_fini(void)
mutex_destroy(&recent_events_lock);
}
void
zfs_ereport_snapshot_post(const char *subclass, spa_t *spa, const char *name)
{
nvlist_t *aux;
aux = fm_nvlist_create(NULL);
nvlist_add_string(aux, FM_EREPORT_PAYLOAD_ZFS_SNAPSHOT_NAME, name);
zfs_post_common(spa, NULL, FM_RSRC_CLASS, subclass, aux);
fm_nvlist_destroy(aux, FM_NVA_FREE);
}
/*
* Post when a event when a zvol is created or removed
*
* This is currently only used by macOS, since it uses the event to create
* symlinks between the volume name (mypool/myvol) and the actual /dev
* device (/dev/disk3). For example:
*
* /var/run/zfs/dsk/mypool/myvol -> /dev/disk3
*
* name: The full name of the zvol ("mypool/myvol")
* dev_name: The full /dev name for the zvol ("/dev/disk3")
* raw_name: The raw /dev name for the zvol ("/dev/rdisk3")
*/
void
zfs_ereport_zvol_post(const char *subclass, const char *name,
const char *dev_name, const char *raw_name)
{
nvlist_t *aux;
char *r;
boolean_t locked = mutex_owned(&spa_namespace_lock);
if (!locked) mutex_enter(&spa_namespace_lock);
spa_t *spa = spa_lookup(name);
if (!locked) mutex_exit(&spa_namespace_lock);
if (spa == NULL)
return;
aux = fm_nvlist_create(NULL);
nvlist_add_string(aux, FM_EREPORT_PAYLOAD_ZFS_DEVICE_NAME, dev_name);
nvlist_add_string(aux, FM_EREPORT_PAYLOAD_ZFS_RAW_DEVICE_NAME,
raw_name);
r = strchr(name, '/');
if (r && r[1])
nvlist_add_string(aux, FM_EREPORT_PAYLOAD_ZFS_VOLUME, &r[1]);
zfs_post_common(spa, NULL, FM_RSRC_CLASS, subclass, aux);
fm_nvlist_destroy(aux, FM_NVA_FREE);
}
EXPORT_SYMBOL(zfs_ereport_post);
EXPORT_SYMBOL(zfs_ereport_is_valid);
EXPORT_SYMBOL(zfs_ereport_post_checksum);