* GPL HEADER END
*/
/*
- * Copyright (c) 2012, 2013, Intel Corporation.
+ * Copyright (c) 2012, 2016, Intel Corporation.
* Use is subject to license terms.
- *
*/
/*
* Author: Brian Behlendorf <behlendorf1@llnl.gov>
*/
#include "mount_utils.h"
+#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include <libzfs.h>
+#define HOSTID_PATH "/etc/hostid"
+
/* Persistent mount data is stored in these user attributes */
#define LDD_PREFIX "lustre:"
#define LDD_VERSION_PROP LDD_PREFIX "version"
}
/*
+ * Remove a property from zfs property dataset
+ */
+static int zfs_remove_prop(zfs_handle_t *zhp, nvlist_t *nvl, char *propname)
+{
+ nvlist_remove_all(nvl, propname);
+ /* XXX: please replace zfs_prop_inherit() if there is a better function
+ * to call zfs_ioctl() to update data on-disk.
+ */
+ return zfs_prop_inherit(zhp, propname, false);
+}
+
+static int zfs_erase_prop(zfs_handle_t *zhp, char *param)
+{
+ nvlist_t *nvl;
+ char propname[ZFS_MAXPROPLEN];
+ int len = strlen(param) + strlen(LDD_PREFIX);
+
+ if (len > ZFS_MAXPROPLEN) {
+ fprintf(stderr, "%s: zfs prop to erase is too long-\n%s\n",
+ progname, param);
+ return EINVAL;
+ }
+
+ nvl = zfs_get_user_props(zhp);
+ if (!nvl)
+ return ENOENT;
+
+ snprintf(propname, len + 1, "%s%s", LDD_PREFIX, param);
+ return zfs_remove_prop(zhp, nvl, propname);
+}
+
+static int zfs_erase_allprops(zfs_handle_t *zhp)
+{
+ nvlist_t *nvl;
+ nvpair_t *curr = NULL;
+
+ nvl = zfs_get_user_props(zhp);
+ if (!nvl)
+ return ENOENT;
+
+ curr = nvlist_next_nvpair(nvl, curr);
+ while (curr) {
+ nvpair_t *next = nvlist_next_nvpair(nvl, curr);
+
+ zfs_remove_prop(zhp, nvl, nvpair_name(curr));
+ curr = next;
+ }
+
+ return 0;
+}
+
+/*
* Map '<key>=<value> ...' pairs in the passed string to dataset properties
- * of the form 'lustre:<key>=<value>'. Malformed <key>=<value> pairs will
- * be skipped.
+ * of the form 'lustre:<key>=<value>'. "<key>=" means to remove this key
+ * from the dataset.
*/
static int zfs_set_prop_params(zfs_handle_t *zhp, char *params)
{
char *params_dup, *token, *key, *value;
char *save_token = NULL;
- char prop_name[ZFS_MAXNAMELEN];
+ char propname[ZFS_MAXPROPLEN];
int ret = 0;
params_dup = strdup(params);
continue;
value = strtok(NULL, "=");
- if (value == NULL)
- continue;
-
- sprintf(prop_name, "%s%s", LDD_PREFIX, key);
- vprint(" %s=%s\n", prop_name, value);
+ if (!value) {
+ /* remove this prop when its value is null */
+ ret = zfs_erase_prop(zhp, key);
+ if (ret)
+ break;
+ } else {
+ snprintf(propname, strlen(LDD_PREFIX) + strlen(key) + 1,
+ "%s%s", LDD_PREFIX, key);
+ vprint(" %s=%s\n", propname, value);
- ret = zfs_prop_set(zhp, prop_name, value);
- if (ret)
- break;
+ ret = zfs_prop_set(zhp, propname, value);
+ if (ret)
+ break;
+ }
token = strtok_r(NULL, " ", &save_token);
}
return ret;
}
+static int zfs_check_hostid(struct mkfs_opts *mop)
+{
+ FILE *f;
+ unsigned long hostid;
+ int rc;
+
+ if (strstr(mop->mo_ldd.ldd_params, PARAM_FAILNODE) == NULL)
+ return 0;
+
+ f = fopen("/sys/module/spl/parameters/spl_hostid", "r");
+ if (f == NULL) {
+ fatal();
+ fprintf(stderr, "Failed to open spl_hostid: %s\n",
+ strerror(errno));
+ return errno;
+ }
+ rc = fscanf(f, "%li", &hostid);
+ fclose(f);
+ if (rc != 1) {
+ fatal();
+ fprintf(stderr, "Failed to read spl_hostid: %d\n", rc);
+ return rc;
+ }
+
+ if (hostid != 0)
+ return 0;
+
+ f = fopen(HOSTID_PATH, "r");
+ if (f == NULL)
+ goto out;
+
+ rc = fread(&hostid, sizeof(uint32_t), 1, f);
+ fclose(f);
+
+ if (rc != 1) {
+ fprintf(stderr, "Failed to read "HOSTID_PATH": %d\n",
+ rc);
+ hostid = 0;
+ }
+
+out:
+ if (hostid == 0) {
+ if (mop->mo_flags & MO_NOHOSTID_CHECK) {
+ fprintf(stderr, "WARNING: spl_hostid not set. ZFS has "
+ "no zpool import protection\n");
+ } else {
+ fatal();
+ fprintf(stderr, "spl_hostid not set. See %s(8)",
+ progname);
+ return EINVAL;
+ }
+ }
+
+ return 0;
+}
+
static int osd_check_zfs_setup(void)
{
if (osd_zfs_setup == 0) {
int i, ret = EINVAL;
if (osd_check_zfs_setup() == 0)
- return EINVAL;
+ goto out;
zhp = zfs_open(g_zfs, ds, ZFS_TYPE_FILESYSTEM);
if (zhp == NULL) {
goto out;
}
+ ret = zfs_check_hostid(mop);
+ if (ret != 0)
+ goto out_close;
+
vprint("Writing %s properties\n", ds);
+ if (mop->mo_flags & MO_ERASE_ALL)
+ ret = zfs_erase_allprops(zhp);
+ ret = zfs_set_prop_params(zhp, ldd->ldd_params);
+
for (i = 0; special_ldd_prop_params[i].zlpb_prop_name != NULL; i++) {
bridge = &special_ldd_prop_params[i];
ret = bridge->zlpb_set_prop_fn(zhp, bridge->zlpb_prop_name,
goto out_close;
}
- ret = zfs_set_prop_params(zhp, ldd->ldd_params);
-
out_close:
zfs_close(zhp);
out:
return ret;
}
+/* Mark a property to be removed by the form of "key=" */
+int zfs_erase_ldd(struct mkfs_opts *mop, char *param)
+{
+ char key[ZFS_MAXPROPLEN] = "";
+
+ if (strlen(LDD_PREFIX) + strlen(param) > ZFS_MAXPROPLEN) {
+ fprintf(stderr, "%s: zfs prop to erase is too long-\n%s\n",
+ progname, param);
+ return EINVAL;
+ }
+ snprintf(key, strlen(param) + 2, "%s=", param);
+ return add_param(mop->mo_ldd.ldd_params, key, "");
+}
+
static int zfs_get_prop_int(zfs_handle_t *zhp, char *prop, void *val)
{
nvlist_t *propval;
return 0;
}
-static int zfs_get_prop_params(zfs_handle_t *zhp, char *param, int len)
+static int zfs_get_prop_params(zfs_handle_t *zhp, char *param)
{
nvlist_t *props;
nvpair_t *nvp;
- char key[ZFS_MAXNAMELEN];
- char *value;
+ char key[ZFS_MAXPROPLEN] = "";
+ char value[PARAM_MAX] = "";
int ret = 0;
props = zfs_get_user_props(zhp);
if (props == NULL)
return ENOENT;
- value = malloc(len);
- if (value == NULL)
- return ENOMEM;
-
nvp = NULL;
while (nvp = nvlist_next_nvpair(props, nvp), nvp) {
ret = zfs_get_prop_str(zhp, nvpair_name(nvp), value);
continue;
sprintf(key, "%s=", nvpair_name(nvp) + strlen(LDD_PREFIX));
-
ret = add_param(param, key, value);
if (ret)
break;
}
- free(value);
-
return ret;
}
return EINVAL;
zhp = zfs_open(g_zfs, ds, ZFS_TYPE_FILESYSTEM);
- if (zhp == NULL)
- goto out;
+ if (!zhp) {
+ zhp = zfs_open(g_zfs, ds, ZFS_TYPE_SNAPSHOT);
+ if (!zhp)
+ goto out;
+ }
for (i = 0; special_ldd_prop_params[i].zlpb_prop_name != NULL; i++) {
bridge = &special_ldd_prop_params[i];
goto out_close;
}
- ret = zfs_get_prop_params(zhp, ldd->ldd_params, 4096);
+ ret = zfs_get_prop_params(zhp, ldd->ldd_params);
if (ret && (ret != ENOENT))
goto out_close;
return ret;
}
+/* Print ldd params */
+void zfs_print_ldd_params(struct mkfs_opts *mop)
+{
+ char *from = mop->mo_ldd.ldd_params;
+ char *to;
+ int len;
+
+ vprint("Parameters:");
+ while (from) {
+ /* skip those keys to be removed in the form of "key=" */
+ to = strstr(from, "= ");
+ if (!to)
+ /* "key=" may be in the end */
+ if (*(from + strlen(from) - 1) == '=')
+ to = from + strlen(from) - 1;
+
+ /* find " " inward */
+ len = strlen(from);
+ if (to) {
+ len = strlen(from) - strlen(to);
+ while ((*(from + len) != ' ') && len)
+ len--;
+ }
+ if (len)
+ /* no space in the end */
+ vprint("%*.*s", len, len, from);
+
+ /* If there is no "key=" or "key=" is in the end, stop. */
+ if (!to || strlen(to) == 1)
+ break;
+
+ /* skip "=" */
+ from = to + 1;
+ }
+}
+
int zfs_is_lustre(char *ds, unsigned *mount_type)
{
struct lustre_disk_data tmp_ldd;
return EINVAL;
}
+ ret = zfs_check_hostid(mop);
+ if (ret != 0)
+ goto out;
+
pool = strdup(ds);
if (pool == NULL)
return ENOMEM;
}
/*
+ * Set Options on ZPOOL
+ *
+ * ALL - canmount=off
+ * 0.7.0 - multihost=on
+ */
+ php = zpool_open(g_zfs, pool);
+ if (php) {
+ if (pool_exists)
+ zpool_set_prop(php, "canmount", "off");
+
+ zpool_set_prop(php, "multihost", "on");
+
+ zpool_close(php);
+ }
+
+ /*
* Create the ZFS filesystem with any required mkfs options:
* - canmount=off is set to prevent zfs automounting
* - xattr=sa is set to use system attribute based xattrs
}
int zfs_prepare_lustre(struct mkfs_opts *mop,
- char *default_mountopts, int default_len,
- char *always_mountopts, int always_len)
+ char *wanted_mountopts, size_t len)
{
if (osd_check_zfs_setup() == 0)
return EINVAL;
return ret;
}
-int zfs_init(void)
+int zfs_rename_fsname(struct mkfs_opts *mop, const char *oldname)
{
- int ret = 0;
+ struct mount_opts opts;
+ char mntpt[] = "/tmp/mntXXXXXX";
+ char *cmd_buf;
+ int ret;
+
+ /* Change the filesystem label. */
+ opts.mo_ldd = mop->mo_ldd;
+ opts.mo_source = mop->mo_device;
+ ret = zfs_label_lustre(&opts);
+ if (ret) {
+ if (errno != 0)
+ ret = errno;
+ fprintf(stderr, "Can't change filesystem label: %s\n",
+ strerror(ret));
+ return ret;
+ }
+
+ /* Mount this device temporarily in order to write these files */
+ if (mkdtemp(mntpt) == NULL) {
+ if (errno != 0)
+ ret = errno;
+ fprintf(stderr, "Can't create temp mount point %s: %s\n",
+ mntpt, strerror(ret));
+ return ret;
+ }
- /* If the ZFS libs are not installed, don't print an error to avoid
- * spamming ldiskfs users. An error message will still be printed if
- * someone tries to do some real work involving a ZFS backend */
+ cmd_buf = malloc(PATH_MAX);
+ if (!cmd_buf) {
+ ret = ENOMEM;
+ goto out_rmdir;
+ }
- if (libzfs_load_module("zfs") != 0) {
- /* The ZFS modules are not installed */
- ret = EINVAL;
- goto out;
+ memset(cmd_buf, 0, PATH_MAX);
+ snprintf(cmd_buf, PATH_MAX - 1, "zfs set mountpoint=%s %s && "
+ "zfs set canmount=on %s && zfs mount %s",
+ mntpt, mop->mo_device, mop->mo_device, mop->mo_device);
+ ret = run_command(cmd_buf, PATH_MAX);
+ if (ret) {
+ if (errno != 0)
+ ret = errno;
+ fprintf(stderr, "Unable to mount %s (%s)\n",
+ mop->mo_device, strerror(ret));
+ if (ret == ENODEV)
+ fprintf(stderr, "Is the %s module available?\n",
+ MT_STR(&mop->mo_ldd));
+ goto out_free;
}
+ ret = lustre_rename_fsname(mop, mntpt, oldname);
+ memset(cmd_buf, 0, PATH_MAX);
+ snprintf(cmd_buf, PATH_MAX - 1, "zfs umount %s && "
+ "zfs set canmount=off %s && zfs set mountpoint=none %s",
+ mop->mo_device, mop->mo_device, mop->mo_device);
+ run_command(cmd_buf, PATH_MAX);
+
+out_free:
+ free(cmd_buf);
+out_rmdir:
+ rmdir(mntpt);
+ return ret;
+}
+
+int zfs_init(void)
+{
+ int ret = 0;
+
g_zfs = libzfs_init();
if (g_zfs == NULL) {
- fprintf(stderr, "Failed to initialize ZFS library\n");
- ret = EINVAL;
+ /* Try to load zfs.ko and retry libzfs_init() */
+
+ ret = system("/sbin/modprobe -q zfs");
+
+ if (ret == 0) {
+ g_zfs = libzfs_init();
+ if (g_zfs == NULL)
+ ret = EINVAL;
+ }
}
-out:
- osd_zfs_setup = 1;
- if (ret)
- zfs_fini();
+
+ if (ret == 0)
+ osd_zfs_setup = 1;
+
+ else
+ fprintf(stderr, "Failed to initialize ZFS library: %d\n", ret);
+
return ret;
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff