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zfsbootcfg: use vfs.root.mountfrom and update nextboot on every vdev

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vfs.zfs.boot.primary_pool is only set on BIOS boot, use vfs.root.mountfrom
instead and update all vdevs on pool.

Reviewed by:	allanjude
Sponsored by:	Netflix, Klara Inc.
Differential Revision:	https://reviews.freebsd.org/D25103
This commit is contained in:
Toomas Soome 2020-06-05 18:18:27 +00:00
parent 310e81aede
commit 007278ebf0
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=361842
1 changed files with 70 additions and 22 deletions
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92
sbin/zfsbootcfg/zfsbootcfg.c
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@ -40,13 +40,44 @@ __FBSDID("$FreeBSD$");
/* Keep in sync with zfsboot.c. */
#define MAX_COMMAND_LEN 512
int
install_bootonce(libzfs_handle_t *hdl, uint64_t pool_guid, nvlist_t *nv,
const char * const data)
{
nvlist_t **child;
uint_t children = 0;
uint64_t guid;
int rv;
(void) nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, &child,
&children);
for (int c = 0; c < children; c++) {
rv = install_bootonce(hdl, pool_guid, child[c], data);
}
if (children > 0)
return (rv);
if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) {
perror("can't get vdev guid");
return (1);
}
if (zpool_nextboot(hdl, pool_guid, guid, data) != 0) {
perror("ZFS_IOC_NEXTBOOT failed");
return (1);
}
return (0);
}
int main(int argc, const char * const *argv)
{
char buf[32];
char buf[32], *name;
libzfs_handle_t *hdl;
zpool_handle_t *zphdl;
uint64_t pool_guid;
uint64_t vdev_guid;
int zfs_fd;
nvlist_t *nv, *config;
int rv;
int len;
if (argc != 2) {
@ -60,39 +91,56 @@ int main(int argc, const char * const *argv)
return (1);
}
if (kenv(KENV_GET, "vfs.zfs.boot.primary_pool", buf, sizeof(buf)) <= 0) {
perror("can't get vfs.zfs.boot.primary_pool");
return (1);
}
pool_guid = strtoumax(buf, NULL, 10);
if (pool_guid == 0) {
perror("can't parse vfs.zfs.boot.primary_pool");
if (kenv(KENV_GET, "vfs.root.mountfrom", buf, sizeof(buf)) <= 0) {
perror("can't get vfs.root.mountfrom");
return (1);
}
if (kenv(KENV_GET, "vfs.zfs.boot.primary_vdev", buf, sizeof(buf)) <= 0) {
perror("can't get vfs.zfs.boot.primary_vdev");
if (strncmp(buf, "zfs:", 4) == 0) {
name = strchr(buf + 4, '/');
if (name != NULL)
*name = '\0';
name = buf + 4;
} else {
perror("not a zfs root");
return (1);
}
vdev_guid = strtoumax(buf, NULL, 10);
if (vdev_guid == 0) {
perror("can't parse vfs.zfs.boot.primary_vdev");
return (1);
}
if ((hdl = libzfs_init()) == NULL) {
(void) fprintf(stderr, "internal error: failed to "
"initialize ZFS library\n");
return (1);
}
if (zpool_nextboot(hdl, pool_guid, vdev_guid, argv[1]) != 0) {
perror("ZFS_IOC_NEXTBOOT failed");
zphdl = zpool_open(hdl, name);
if (zphdl == NULL) {
perror("can't open pool");
libzfs_fini(hdl);
return (1);
}
pool_guid = zpool_get_prop_int(zphdl, ZPOOL_PROP_GUID, NULL);
config = zpool_get_config(zphdl, NULL);
if (config == NULL) {
perror("can't get pool config");
zpool_close(zphdl);
libzfs_fini(hdl);
return (1);
}
if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nv) != 0) {
perror("failed to get vdev tree");
zpool_close(zphdl);
libzfs_fini(hdl);
return (1);
}
rv = install_bootonce(hdl, pool_guid, nv, argv[1]);
zpool_close(zphdl);
libzfs_fini(hdl);
printf("zfs next boot options are successfully written\n");
return (0);
if (rv == 0)
printf("zfs next boot options are successfully written\n");
return (rv);
}