/*
* Handle a EC_DEV_ADD.ESC_DISK event.
*
* illumos
* Expects: DEV_PHYS_PATH string in schema
* Matches: vdev's ZPOOL_CONFIG_PHYS_PATH or ZPOOL_CONFIG_DEVID
*
* path: '/dev/dsk/c0t1d0s0' (persistent)
* devid: 'id1,sd@SATA_____Hitachi_HDS72101______JP2940HZ3H74MC/a'
* phys_path: '/pci@0,0/pci103c,1609@11/disk@1,0:a'
*
* linux
* provides: DEV_PHYS_PATH and DEV_IDENTIFIER strings in schema
* Matches: vdev's ZPOOL_CONFIG_PHYS_PATH or ZPOOL_CONFIG_DEVID
*
* path: '/dev/sdc1' (not persistent)
* devid: 'ata-SAMSUNG_HD204UI_S2HGJD2Z805891-part1'
* phys_path: 'pci-0000:04:00.0-sas-0x4433221106000000-lun-0'
*/
static int
zfs_deliver_add(nvlist_t *nvl, boolean_t is_lofi)
{
char *devpath = NULL, *devid;
boolean_t is_slice;
/*
* Expecting a devid string and an optional physical location
*/
if (nvlist_lookup_string(nvl, DEV_IDENTIFIER, &devid) != 0)
return (-1);
(void) nvlist_lookup_string(nvl, DEV_PHYS_PATH, &devpath);
is_slice = (nvlist_lookup_boolean(nvl, DEV_IS_PART) == 0);
zed_log_msg(LOG_INFO, "zfs_deliver_add: adding %s (%s) (is_slice %d)",
devid, devpath ? devpath : "NULL", is_slice);
/*
* Iterate over all vdevs looking for a match in the folllowing order:
* 1. ZPOOL_CONFIG_DEVID (identifies the unique disk)
* 2. ZPOOL_CONFIG_PHYS_PATH (identifies disk physical location).
*
* For disks, we only want to pay attention to vdevs marked as whole
* disks or are a multipath device.
*/
if (!devid_iter(devid, zfs_process_add, is_slice) && devpath != NULL)
(void) devphys_iter(devpath, devid, zfs_process_add, is_slice);
return (0);
}
/*
* This function is called when we receive a devfs add event. This can be
* either a disk event or a lofi event, and the behavior is slightly different
* depending on which it is.
*/
static int
zfs_deliver_add(nvlist_t *nvl, boolean_t is_lofi)
{
char *devpath, *devname;
char path[PATH_MAX], realpath[PATH_MAX];
char *colon, *raw;
int ret;
/*
* The main unit of operation is the physical device path. For disks,
* this is the device node, as all minor nodes are affected. For lofi
* devices, this includes the minor path. Unfortunately, this isn't
* represented in the DEV_PHYS_PATH for various reasons.
*/
if (nvlist_lookup_string(nvl, DEV_PHYS_PATH, &devpath) != 0)
return (-1);
/*
* If this is a lofi device, then also get the minor instance name.
* Unfortunately, the current payload doesn't include an easy way to get
* this information. So we cheat by resolving the 'dev_name' (which
* refers to the raw device) and taking the portion between ':(*),raw'.
*/
(void) strlcpy(realpath, devpath, sizeof (realpath));
if (is_lofi) {
if (nvlist_lookup_string(nvl, DEV_NAME,
&devname) == 0 &&
(ret = resolvepath(devname, path,
sizeof (path))) > 0) {
path[ret] = '\0';
colon = strchr(path, ':');
if (colon != NULL)
raw = strstr(colon + 1, ",raw");
if (colon != NULL && raw != NULL) {
*raw = '\0';
(void) snprintf(realpath,
sizeof (realpath), "%s%s",
devpath, colon);
*raw = ',';
}
}
}
/*
* Iterate over all vdevs with a matching devid, and then those with a
* matching /devices path. For disks, we only want to pay attention to
* vdevs marked as whole disks. For lofi, we don't care (because we're
* matching an exact minor name).
*/
if (!devid_iter(realpath, zfs_process_add, !is_lofi))
(void) devpath_iter(realpath, zfs_process_add, !is_lofi);
return (0);
}
