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-rw-r--r--Manage.c1854
1 files changed, 1854 insertions, 0 deletions
diff --git a/Manage.c b/Manage.c
new file mode 100644
index 0000000..30302ac
--- /dev/null
+++ b/Manage.c
@@ -0,0 +1,1854 @@
+/*
+ * mdadm - manage Linux "md" devices aka RAID arrays.
+ *
+ * Copyright (C) 2001-2013 Neil Brown <neilb@suse.de>
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Neil Brown
+ * Email: <neilb@suse.de>
+ */
+
+#include "mdadm.h"
+#include "md_u.h"
+#include "md_p.h"
+#include "udev.h"
+#include <ctype.h>
+
+int Manage_ro(char *devname, int fd, int readonly)
+{
+ /* switch to readonly or rw
+ *
+ * requires >= 0.90.0
+ * first check that array is runing
+ * use RESTART_ARRAY_RW or STOP_ARRAY_RO
+ *
+ */
+ struct mdinfo *mdi;
+ int rv = 0;
+
+ /* If this is an externally-managed array, we need to modify the
+ * metadata_version so that mdmon doesn't undo our change.
+ */
+ mdi = sysfs_read(fd, NULL, GET_LEVEL|GET_VERSION);
+ if (mdi &&
+ mdi->array.major_version == -1 &&
+ is_subarray(mdi->text_version)) {
+ char vers[64];
+ strcpy(vers, "external:");
+ strcat(vers, mdi->text_version);
+ if (readonly > 0) {
+ int rv;
+ /* We set readonly ourselves. */
+ vers[9] = '-';
+ sysfs_set_str(mdi, NULL, "metadata_version", vers);
+
+ close(fd);
+ rv = sysfs_set_str(mdi, NULL, "array_state", "readonly");
+
+ if (rv < 0) {
+ pr_err("failed to set readonly for %s: %s\n",
+ devname, strerror(errno));
+
+ vers[9] = mdi->text_version[0];
+ sysfs_set_str(mdi, NULL, "metadata_version", vers);
+ rv = 1;
+ goto out;
+ }
+ } else {
+ char *cp;
+ /* We cannot set read/write - must signal mdmon */
+ vers[9] = '/';
+ sysfs_set_str(mdi, NULL, "metadata_version", vers);
+
+ cp = strchr(vers+10, '/');
+ if (cp)
+ *cp = 0;
+ ping_monitor(vers+10);
+ if (mdi->array.level <= 0)
+ sysfs_set_str(mdi, NULL, "array_state", "active");
+ }
+ goto out;
+ }
+
+ if (!md_array_active(fd)) {
+ pr_err("%s does not appear to be active.\n", devname);
+ rv = 1;
+ goto out;
+ }
+
+ if (readonly > 0) {
+ if (ioctl(fd, STOP_ARRAY_RO, NULL)) {
+ pr_err("failed to set readonly for %s: %s\n",
+ devname, strerror(errno));
+ rv = 1;
+ goto out;
+ }
+ } else if (readonly < 0) {
+ if (ioctl(fd, RESTART_ARRAY_RW, NULL)) {
+ pr_err("failed to set writable for %s: %s\n",
+ devname, strerror(errno));
+ rv = 1;
+ goto out;
+ }
+ }
+out:
+ sysfs_free(mdi);
+ return rv;
+}
+
+static void remove_devices(char *devnm, char *path)
+{
+ /*
+ * Remove names at 'path' - possibly with
+ * partition suffixes - which link to the 'standard'
+ * name for devnm. These were probably created
+ * by mdadm when the array was assembled.
+ */
+ char base[40];
+ char *path2;
+ char link[1024];
+ int n;
+ int part;
+ char *be;
+ char *pe;
+
+ if (!path)
+ return;
+
+ sprintf(base, "/dev/%s", devnm);
+ be = base + strlen(base);
+
+ path2 = xmalloc(strlen(path)+20);
+ strcpy(path2, path);
+ pe = path2 + strlen(path2);
+
+ for (part = 0; part < 16; part++) {
+ if (part) {
+ sprintf(be, "p%d", part);
+
+ if (isdigit(pe[-1]))
+ sprintf(pe, "p%d", part);
+ else
+ sprintf(pe, "%d", part);
+ }
+ n = readlink(path2, link, sizeof(link));
+ if (n > 0 && (int)strlen(base) == n &&
+ strncmp(link, base, n) == 0)
+ unlink(path2);
+ }
+ free(path2);
+}
+
+int Manage_run(char *devname, int fd, struct context *c)
+{
+ /* Run the array. Array must already be configured
+ * Requires >= 0.90.0
+ */
+ char nm[32], *nmp;
+
+ nmp = fd2devnm(fd);
+ if (!nmp) {
+ pr_err("Cannot find %s in sysfs!!\n", devname);
+ return 1;
+ }
+ strcpy(nm, nmp);
+ return IncrementalScan(c, nm);
+}
+
+int Manage_stop(char *devname, int fd, int verbose, int will_retry)
+{
+ /* Stop the array. Array must already be configured
+ * 'will_retry' means that error messages are not wanted.
+ */
+ int rv = 0;
+ struct map_ent *map = NULL;
+ struct mdinfo *mdi;
+ char devnm[32];
+ char container[32];
+ int err;
+ int count;
+ char buf[SYSFS_MAX_BUF_SIZE];
+ unsigned long long rd1, rd2;
+
+ if (will_retry && verbose == 0)
+ verbose = -1;
+
+ strcpy(devnm, fd2devnm(fd));
+ /* Get EXCL access first. If this fails, then attempting
+ * to stop is probably a bad idea.
+ */
+ mdi = sysfs_read(fd, NULL, GET_LEVEL|GET_COMPONENT|GET_VERSION);
+ if (mdi && is_subarray(mdi->text_version)) {
+ char *sl;
+ strncpy(container, mdi->text_version+1, sizeof(container));
+ container[sizeof(container)-1] = 0;
+ sl = strchr(container, '/');
+ if (sl)
+ *sl = 0;
+ } else
+ container[0] = 0;
+ close(fd);
+ count = 5;
+ while (((fd = ((devname[0] == '/')
+ ?open(devname, O_RDONLY|O_EXCL)
+ :open_dev_flags(devnm, O_RDONLY|O_EXCL))) < 0 ||
+ strcmp(fd2devnm(fd), devnm) != 0) && container[0] &&
+ mdmon_running(container) && count) {
+ /* Can't open, so something might be wrong. However it
+ * is a container, so we might be racing with mdmon, so
+ * retry for a bit.
+ */
+ if (fd >= 0)
+ close(fd);
+ flush_mdmon(container);
+ count--;
+ }
+ if (fd < 0 || strcmp(fd2devnm(fd), devnm) != 0) {
+ if (fd >= 0)
+ close(fd);
+ if (verbose >= 0)
+ pr_err("Cannot get exclusive access to %s:Perhaps a running process, mounted filesystem or active volume group?\n",
+ devname);
+ sysfs_free(mdi);
+ return 1;
+ }
+ /* If this is an mdmon managed array, just write 'inactive'
+ * to the array state and let mdmon clear up.
+ */
+ if (mdi &&
+ mdi->array.level > 0 &&
+ is_subarray(mdi->text_version)) {
+ int err;
+ /* This is mdmon managed. */
+ close(fd);
+
+ /* As we had an O_EXCL open, any use of the device
+ * which blocks STOP_ARRAY is probably a transient use,
+ * so it is reasonable to retry for a while - 5 seconds.
+ */
+ count = 25;
+ while (count &&
+ (err = sysfs_set_str(mdi, NULL,
+ "array_state",
+ "inactive")) < 0 &&
+ errno == EBUSY) {
+ sleep_for(0, MSEC_TO_NSEC(200), true);
+ count--;
+ }
+ if (err) {
+ if (verbose >= 0)
+ pr_err("failed to stop array %s: %s\n",
+ devname, strerror(errno));
+ rv = 1;
+ goto out;
+ }
+
+ /* Give monitor a chance to act */
+ ping_monitor(mdi->text_version);
+
+ fd = open_dev_excl(devnm);
+ if (fd < 0) {
+ if (verbose >= 0)
+ pr_err("failed to completely stop %s: Device is busy\n",
+ devname);
+ rv = 1;
+ goto out;
+ }
+ } else if (mdi &&
+ mdi->array.major_version == -1 &&
+ mdi->array.minor_version == -2 &&
+ !is_subarray(mdi->text_version)) {
+ struct mdstat_ent *mds, *m;
+ /* container, possibly mdmon-managed.
+ * Make sure mdmon isn't opening it, which
+ * would interfere with the 'stop'
+ */
+ ping_monitor(mdi->sys_name);
+
+ /* now check that there are no existing arrays
+ * which are members of this array
+ */
+ mds = mdstat_read(0, 0);
+ for (m = mds; m; m = m->next)
+ if (m->metadata_version &&
+ strncmp(m->metadata_version, "external:", 9)==0 &&
+ metadata_container_matches(m->metadata_version+9,
+ devnm)) {
+ if (verbose >= 0)
+ pr_err("Cannot stop container %s: member %s still active\n",
+ devname, m->devnm);
+ free_mdstat(mds);
+ rv = 1;
+ goto out;
+ }
+ }
+
+ /* If the array is undergoing a reshape which changes the number
+ * of devices, then it would be nice to stop it at a point where
+ * it has completed a full number of stripes in both old and
+ * new layouts as this will allow the reshape to be reverted.
+ * So if 'sync_action' is "reshape" and 'raid_disks' shows two
+ * different numbers, then
+ * - freeze reshape
+ * - set sync_max to next multiple of both data_disks and
+ * chunk sizes (or next but one)
+ * - unfreeze reshape
+ * - wait on 'sync_completed' for that point to be reached.
+ */
+ if (mdi && is_level456(mdi->array.level) &&
+ sysfs_attribute_available(mdi, NULL, "sync_action") &&
+ sysfs_attribute_available(mdi, NULL, "reshape_direction") &&
+ sysfs_get_str(mdi, NULL, "sync_action", buf, sizeof(buf)) > 0 &&
+ strcmp(buf, "reshape\n") == 0 &&
+ sysfs_get_two(mdi, NULL, "raid_disks", &rd1, &rd2) == 2) {
+ unsigned long long position, curr;
+ unsigned long long chunk1, chunk2;
+ unsigned long long rddiv, chunkdiv;
+ unsigned long long sectors;
+ unsigned long long sync_max, old_sync_max;
+ unsigned long long completed;
+ int backwards = 0;
+ int delay;
+ int scfd;
+
+ delay = 40;
+ while (rd1 > rd2 && delay > 0 &&
+ sysfs_get_ll(mdi, NULL, "sync_max", &old_sync_max) == 0) {
+ /* must be in the critical section - wait a bit */
+ delay -= 1;
+ sleep_for(0, MSEC_TO_NSEC(100), true);
+ }
+
+ if (sysfs_set_str(mdi, NULL, "sync_action", "frozen") != 0)
+ goto done;
+ /* Array is frozen */
+
+ rd1 -= mdi->array.level == 6 ? 2 : 1;
+ rd2 -= mdi->array.level == 6 ? 2 : 1;
+ sysfs_get_str(mdi, NULL, "reshape_direction", buf, sizeof(buf));
+ if (strncmp(buf, "back", 4) == 0)
+ backwards = 1;
+ if (sysfs_get_ll(mdi, NULL, "reshape_position", &position) != 0) {
+ /* reshape must have finished now */
+ sysfs_set_str(mdi, NULL, "sync_action", "idle");
+ goto done;
+ }
+ sysfs_get_two(mdi, NULL, "chunk_size", &chunk1, &chunk2);
+ chunk1 /= 512;
+ chunk2 /= 512;
+ rddiv = GCD(rd1, rd2);
+ chunkdiv = GCD(chunk1, chunk2);
+ sectors = (chunk1/chunkdiv) * chunk2 * (rd1/rddiv) * rd2;
+
+ if (backwards) {
+ /* Need to subtract 'reshape_position' from
+ * array size to get equivalent of sync_max.
+ * Size calculation based on raid5_size in kernel.
+ */
+ unsigned long long size = mdi->component_size;
+ size &= ~(chunk1-1);
+ size &= ~(chunk2-1);
+ /* rd1 must be smaller */
+ /* Reshape may have progressed further backwards than
+ * recorded, so target even further back (hence "-1")
+ */
+ position = (position / sectors - 1) * sectors;
+ /* rd1 is always the conversion factor between 'sync'
+ * position and 'reshape' position.
+ * We read 1 "new" stripe worth of data from where-ever,
+ * and when write out that full stripe.
+ */
+ sync_max = size - position/rd1;
+ } else {
+ /* Reshape will very likely be beyond position, and it may
+ * be too late to stop at '+1', so aim for '+2'
+ */
+ position = (position / sectors + 2) * sectors;
+ sync_max = position/rd1;
+ }
+ if (sysfs_get_ll(mdi, NULL, "sync_max", &old_sync_max) < 0)
+ old_sync_max = mdi->component_size;
+ /* Must not advance sync_max as that could confuse
+ * the reshape monitor */
+ if (sync_max < old_sync_max)
+ sysfs_set_num(mdi, NULL, "sync_max", sync_max);
+ sysfs_set_str(mdi, NULL, "sync_action", "idle");
+
+ /* That should have set things going again. Now we
+ * wait a little while (3 second max) for sync_completed
+ * to reach the target.
+ * The reshape process can block for 500msec if
+ * the sync speed limit is hit, so we need to wait
+ * a lot longer than that. 1 second is usually
+ * enough. 3 is safe.
+ */
+ delay = 3000;
+ scfd = sysfs_open(mdi->sys_name, NULL, "sync_completed");
+ while (scfd >= 0 && delay > 0 && old_sync_max > 0) {
+ unsigned long long max_completed;
+ sysfs_get_ll(mdi, NULL, "reshape_position", &curr);
+ sysfs_fd_get_str(scfd, buf, sizeof(buf));
+ if (str_is_none(buf) == true) {
+ /* Either reshape has aborted, or hasn't
+ * quite started yet. Wait a bit and
+ * check 'sync_action' to see.
+ */
+ sleep_for(0, MSEC_TO_NSEC(10), true);
+ sysfs_get_str(mdi, NULL, "sync_action", buf, sizeof(buf));
+ if (strncmp(buf, "reshape", 7) != 0)
+ break;
+ }
+
+ if (sysfs_fd_get_two(scfd, &completed,
+ &max_completed) == 2 &&
+ /* 'completed' sometimes reads as max-uulong */
+ completed < max_completed &&
+ (completed > sync_max ||
+ (completed == sync_max && curr != position))) {
+ while (completed > sync_max) {
+ sync_max += sectors / rd1;
+ if (backwards)
+ position -= sectors;
+ else
+ position += sectors;
+ }
+ if (sync_max < old_sync_max)
+ sysfs_set_num(mdi, NULL, "sync_max", sync_max);
+ }
+
+ if (!backwards && curr >= position)
+ break;
+ if (backwards && curr <= position)
+ break;
+ sysfs_wait(scfd, &delay);
+ }
+ if (scfd >= 0)
+ close(scfd);
+
+ }
+done:
+
+ /* As we have an O_EXCL open, any use of the device
+ * which blocks STOP_ARRAY is probably a transient use,
+ * so it is reasonable to retry for a while - 5 seconds.
+ */
+ count = 25; err = 0;
+ while (count && fd >= 0 &&
+ (err = ioctl(fd, STOP_ARRAY, NULL)) < 0 && errno == EBUSY) {
+ sleep_for(0, MSEC_TO_NSEC(200), true);
+ count --;
+ }
+ if (fd >= 0 && err) {
+ if (verbose >= 0) {
+ pr_err("failed to stop array %s: %s\n",
+ devname, strerror(errno));
+ if (errno == EBUSY)
+ cont_err("Perhaps a running process, mounted filesystem or active volume group?\n");
+ }
+ rv = 1;
+ goto out;
+ }
+
+ if (devnm[0] && udev_is_available()) {
+ struct map_ent *mp = map_by_devnm(&map, devnm);
+ remove_devices(devnm, mp ? mp->path : NULL);
+ }
+
+ if (verbose >= 0)
+ pr_err("stopped %s\n", devname);
+ map_lock(&map);
+ map_remove(&map, devnm);
+ map_unlock(&map);
+out:
+ sysfs_free(mdi);
+
+ return rv;
+}
+
+static struct mddev_dev *add_one(struct mddev_dev *dv, char *name, char disp)
+{
+ struct mddev_dev *new;
+ new = xmalloc(sizeof(*new));
+ memset(new, 0, sizeof(*new));
+ new->devname = xstrdup(name);
+ new->disposition = disp;
+ new->next = dv->next;
+ dv->next = new;
+ return new;
+}
+
+static void add_faulty(struct mddev_dev *dv, int fd, char disp)
+{
+ mdu_array_info_t array;
+ mdu_disk_info_t disk;
+ int remaining_disks;
+ int i;
+
+ if (md_get_array_info(fd, &array) != 0)
+ return;
+
+ remaining_disks = array.nr_disks;
+ for (i = 0; i < MAX_DISKS && remaining_disks > 0; i++) {
+ char buf[40];
+ disk.number = i;
+ if (md_get_disk_info(fd, &disk) != 0)
+ continue;
+ if (disk.major == 0 && disk.minor == 0)
+ continue;
+ remaining_disks--;
+ if ((disk.state & 1) == 0) /* not faulty */
+ continue;
+ sprintf(buf, "%d:%d", disk.major, disk.minor);
+ dv = add_one(dv, buf, disp);
+ }
+}
+
+static void add_detached(struct mddev_dev *dv, int fd, char disp)
+{
+ mdu_array_info_t array;
+ mdu_disk_info_t disk;
+ int remaining_disks;
+ int i;
+
+ if (md_get_array_info(fd, &array) != 0)
+ return;
+
+ remaining_disks = array.nr_disks;
+ for (i = 0; i < MAX_DISKS && remaining_disks > 0; i++) {
+ char buf[40];
+ int sfd;
+ disk.number = i;
+ if (md_get_disk_info(fd, &disk) != 0)
+ continue;
+ if (disk.major == 0 && disk.minor == 0)
+ continue;
+ remaining_disks--;
+ if (disp == 'f' && (disk.state & 1) != 0) /* already faulty */
+ continue;
+ sprintf(buf, "%d:%d", disk.major, disk.minor);
+ sfd = dev_open(buf, O_RDONLY);
+ if (sfd >= 0) {
+ /* Not detached */
+ close(sfd);
+ continue;
+ }
+ if (errno != ENXIO)
+ /* Probably not detached */
+ continue;
+ dv = add_one(dv, buf, disp);
+ }
+}
+
+static void add_set(struct mddev_dev *dv, int fd, char set_char)
+{
+ mdu_array_info_t array;
+ mdu_disk_info_t disk;
+ int remaining_disks;
+ int copies, set;
+ int i;
+
+ if (md_get_array_info(fd, &array) != 0)
+ return;
+ if (array.level != 10)
+ return;
+ copies = ((array.layout & 0xff) *
+ ((array.layout >> 8) & 0xff));
+ if (array.raid_disks % copies)
+ return;
+
+ remaining_disks = array.nr_disks;
+ for (i = 0; i < MAX_DISKS && remaining_disks > 0; i++) {
+ char buf[40];
+ disk.number = i;
+ if (md_get_disk_info(fd, &disk) != 0)
+ continue;
+ if (disk.major == 0 && disk.minor == 0)
+ continue;
+ remaining_disks--;
+ set = disk.raid_disk % copies;
+ if (set_char != set + 'A')
+ continue;
+ sprintf(buf, "%d:%d", disk.major, disk.minor);
+ dv = add_one(dv, buf, dv->disposition);
+ }
+}
+
+int attempt_re_add(int fd, int tfd, struct mddev_dev *dv,
+ struct supertype *dev_st, struct supertype *tst,
+ unsigned long rdev, enum update_opt update,
+ char *devname, int verbose, mdu_array_info_t *array)
+{
+ struct mdinfo mdi;
+ int duuid[4];
+ int ouuid[4];
+
+ dev_st->ss->getinfo_super(dev_st, &mdi, NULL);
+ dev_st->ss->uuid_from_super(dev_st, ouuid);
+ if (tst->sb)
+ tst->ss->uuid_from_super(tst, duuid);
+ else
+ /* Assume uuid matches: kernel will check */
+ memcpy(duuid, ouuid, sizeof(ouuid));
+ if ((mdi.disk.state & (1<<MD_DISK_ACTIVE)) &&
+ !(mdi.disk.state & (1<<MD_DISK_FAULTY)) &&
+ memcmp(duuid, ouuid, sizeof(ouuid))==0) {
+ /* Looks like it is worth a
+ * try. Need to make sure
+ * kernel will accept it
+ * though.
+ */
+ mdu_disk_info_t disc;
+ disc.number = mdi.disk.number;
+ if (md_get_disk_info(fd, &disc) != 0 ||
+ disc.major != 0 || disc.minor != 0)
+ goto skip_re_add;
+ disc.major = major(rdev);
+ disc.minor = minor(rdev);
+ disc.number = mdi.disk.number;
+ disc.raid_disk = mdi.disk.raid_disk;
+ disc.state = mdi.disk.state;
+ if (array->state & (1 << MD_SB_CLUSTERED)) {
+ /* extra flags are needed when adding to a cluster as
+ * there are two cases to distinguish
+ */
+ if (dv->disposition == 'c')
+ disc.state |= (1 << MD_DISK_CANDIDATE);
+ else
+ disc.state |= (1 << MD_DISK_CLUSTER_ADD);
+ }
+ if (dv->writemostly == FlagSet)
+ disc.state |= 1 << MD_DISK_WRITEMOSTLY;
+ if (dv->writemostly == FlagClear)
+ disc.state &= ~(1 << MD_DISK_WRITEMOSTLY);
+ if (dv->failfast == FlagSet)
+ disc.state |= 1 << MD_DISK_FAILFAST;
+ if (dv->failfast == FlagClear)
+ disc.state &= ~(1 << MD_DISK_FAILFAST);
+ remove_partitions(tfd);
+ if (update || dv->writemostly != FlagDefault ||
+ dv->failfast != FlagDefault) {
+ int rv = -1;
+ tfd = dev_open(dv->devname, O_RDWR);
+ if (tfd < 0) {
+ pr_err("failed to open %s for superblock update during re-add\n", dv->devname);
+ return -1;
+ }
+
+ if (dv->writemostly == FlagSet)
+ rv = dev_st->ss->update_super(
+ dev_st, NULL, UOPT_SPEC_WRITEMOSTLY,
+ devname, verbose, 0, NULL);
+ if (dv->writemostly == FlagClear)
+ rv = dev_st->ss->update_super(
+ dev_st, NULL, UOPT_SPEC_READWRITE,
+ devname, verbose, 0, NULL);
+ if (dv->failfast == FlagSet)
+ rv = dev_st->ss->update_super(
+ dev_st, NULL, UOPT_SPEC_FAILFAST,
+ devname, verbose, 0, NULL);
+ if (dv->failfast == FlagClear)
+ rv = dev_st->ss->update_super(
+ dev_st, NULL, UOPT_SPEC_NOFAILFAST,
+ devname, verbose, 0, NULL);
+ if (update)
+ rv = dev_st->ss->update_super(
+ dev_st, NULL, update,
+ devname, verbose, 0, NULL);
+ if (rv == 0)
+ rv = dev_st->ss->store_super(dev_st, tfd);
+ close(tfd);
+ if (rv != 0) {
+ pr_err("failed to update superblock during re-add\n");
+ return -1;
+ }
+ }
+ /* don't even try if disk is marked as faulty */
+ errno = 0;
+ if (ioctl(fd, ADD_NEW_DISK, &disc) == 0) {
+ if (verbose >= 0)
+ pr_err("re-added %s\n", dv->devname);
+ return 1;
+ }
+ if (errno == ENOMEM || errno == EROFS) {
+ pr_err("add new device failed for %s: %s\n",
+ dv->devname, strerror(errno));
+ if (dv->disposition == 'M')
+ return 0;
+ return -1;
+ }
+ }
+skip_re_add:
+ return 0;
+}
+
+int Manage_add(int fd, int tfd, struct mddev_dev *dv,
+ struct supertype *tst, mdu_array_info_t *array,
+ int force, int verbose, char *devname,
+ enum update_opt update, unsigned long rdev,
+ unsigned long long array_size, int raid_slot)
+{
+ unsigned long long ldsize;
+ struct supertype *dev_st;
+ int j;
+ mdu_disk_info_t disc;
+ struct map_ent *map = NULL;
+
+ if (!get_dev_size(tfd, dv->devname, &ldsize)) {
+ if (dv->disposition == 'M')
+ return 0;
+ else
+ return -1;
+ }
+
+ if (tst->ss == &super0 && ldsize > 4ULL*1024*1024*1024*1024) {
+ /* More than 4TB is wasted on v0.90 */
+ if (!force) {
+ pr_err("%s is larger than %s can effectively use.\n"
+ " Add --force is you really want to add this device.\n",
+ dv->devname, devname);
+ return -1;
+ }
+ pr_err("%s is larger than %s can effectively use.\n"
+ " Adding anyway as --force was given.\n",
+ dv->devname, devname);
+ }
+
+ if (array->not_persistent == 0 || tst->ss->external) {
+
+ /* need to find a sample superblock to copy, and
+ * a spare slot to use.
+ * For 'external' array (well, container based),
+ * We can just load the metadata for the array->
+ */
+ int array_failed;
+ if (tst->sb)
+ /* already loaded */;
+ else if (tst->ss->external) {
+ tst->ss->load_container(tst, fd, NULL);
+ } else for (j = 0; j < tst->max_devs; j++) {
+ char *dev;
+ int dfd;
+ disc.number = j;
+ if (md_get_disk_info(fd, &disc))
+ continue;
+ if (disc.major==0 && disc.minor==0)
+ continue;
+ if ((disc.state & 4)==0) /* sync */
+ continue;
+ /* Looks like a good device to try */
+ dev = map_dev(disc.major, disc.minor, 1);
+ if (!dev)
+ continue;
+ dfd = dev_open(dev, O_RDONLY);
+ if (dfd < 0)
+ continue;
+ if (tst->ss->load_super(tst, dfd,
+ NULL)) {
+ close(dfd);
+ continue;
+ }
+ close(dfd);
+ break;
+ }
+ /* FIXME this is a bad test to be using */
+ if (!tst->sb && (dv->disposition != 'a' &&
+ dv->disposition != 'S')) {
+ /* we are re-adding a device to a
+ * completely dead array - have to depend
+ * on kernel to check
+ */
+ } else if (!tst->sb) {
+ pr_err("cannot load array metadata from %s\n", devname);
+ return -1;
+ }
+
+ /* Make sure device is large enough */
+ if (dv->disposition != 'j' && /* skip size check for Journal */
+ tst->sb &&
+ tst->ss->avail_size(tst, ldsize/512, INVALID_SECTORS) <
+ array_size) {
+ if (dv->disposition == 'M')
+ return 0;
+ pr_err("%s not large enough to join array\n",
+ dv->devname);
+ return -1;
+ }
+
+ /* Possibly this device was recently part of
+ * the array and was temporarily removed, and
+ * is now being re-added. If so, we can
+ * simply re-add it.
+ */
+
+ if (array->not_persistent == 0) {
+ dev_st = dup_super(tst);
+ dev_st->ss->load_super(dev_st, tfd, NULL);
+ if (dev_st->sb && dv->disposition != 'S') {
+ int rv;
+
+ rv = attempt_re_add(fd, tfd, dv, dev_st, tst,
+ rdev, update, devname,
+ verbose, array);
+ dev_st->ss->free_super(dev_st);
+ if (rv) {
+ free(dev_st);
+ return rv;
+ }
+ }
+ if (dev_st) {
+ dev_st->ss->free_super(dev_st);
+ free(dev_st);
+ }
+ }
+ if (dv->disposition == 'M') {
+ if (verbose > 0)
+ pr_err("--re-add for %s to %s is not possible\n",
+ dv->devname, devname);
+ return 0;
+ }
+ if (dv->disposition == 'A') {
+ pr_err("--re-add for %s to %s is not possible\n",
+ dv->devname, devname);
+ return -1;
+ }
+ if (array->active_disks < array->raid_disks) {
+ char *avail = xcalloc(array->raid_disks, 1);
+ int d;
+ int found = 0;
+
+ for (d = 0; d < MAX_DISKS && found < array->nr_disks; d++) {
+ disc.number = d;
+ if (md_get_disk_info(fd, &disc))
+ continue;
+ if (disc.major == 0 && disc.minor == 0)
+ continue;
+ if (!(disc.state & (1<<MD_DISK_SYNC)))
+ continue;
+ avail[disc.raid_disk] = 1;
+ found++;
+ }
+ array_failed = !enough(array->level, array->raid_disks,
+ array->layout, 1, avail);
+ free(avail);
+ } else
+ array_failed = 0;
+ if (array_failed) {
+ pr_err("%s has failed so using --add cannot work and might destroy\n",
+ devname);
+ pr_err("data on %s. You should stop the array and re-assemble it.\n",
+ dv->devname);
+ return -1;
+ }
+ } else {
+ /* non-persistent. Must ensure that new drive
+ * is at least array->size big.
+ */
+ if (ldsize/512 < array_size) {
+ pr_err("%s not large enough to join array\n",
+ dv->devname);
+ return -1;
+ }
+ }
+ /* committed to really trying this device now*/
+ remove_partitions(tfd);
+
+ /* in 2.6.17 and earlier, version-1 superblocks won't
+ * use the number we write, but will choose a free number.
+ * we must choose the same free number, which requires
+ * starting at 'raid_disks' and counting up
+ */
+ for (j = array->raid_disks; j < tst->max_devs; j++) {
+ disc.number = j;
+ if (md_get_disk_info(fd, &disc))
+ break;
+ if (disc.major==0 && disc.minor==0)
+ break;
+ if (disc.state & 8) /* removed */
+ break;
+ }
+ disc.major = major(rdev);
+ disc.minor = minor(rdev);
+ if (raid_slot < 0)
+ disc.number = j;
+ else
+ disc.number = raid_slot;
+ disc.state = 0;
+
+ /* only add journal to array that supports journaling */
+ if (dv->disposition == 'j') {
+ struct mdinfo *mdp;
+
+ mdp = sysfs_read(fd, NULL, GET_ARRAY_STATE);
+ if (!mdp) {
+ pr_err("%s unable to read array state.\n", devname);
+ return -1;
+ }
+
+ if (mdp->array_state != ARRAY_READONLY) {
+ sysfs_free(mdp);
+ pr_err("%s is not readonly, cannot add journal.\n", devname);
+ return -1;
+ }
+
+ sysfs_free(mdp);
+
+ disc.raid_disk = 0;
+ }
+
+ if (map_lock(&map))
+ pr_err("failed to get exclusive lock on mapfile when add disk\n");
+
+ if (array->not_persistent==0) {
+ int dfd;
+ if (dv->disposition == 'j')
+ disc.state |= (1 << MD_DISK_JOURNAL) | (1 << MD_DISK_SYNC);
+ if (dv->writemostly == FlagSet)
+ disc.state |= 1 << MD_DISK_WRITEMOSTLY;
+ if (dv->failfast == FlagSet)
+ disc.state |= 1 << MD_DISK_FAILFAST;
+ dfd = dev_open(dv->devname, O_RDWR | O_EXCL|O_DIRECT);
+ if (tst->ss->add_to_super(tst, &disc, dfd,
+ dv->devname, INVALID_SECTORS))
+ goto unlock;
+ if (tst->ss->write_init_super(tst))
+ goto unlock;
+ } else if (dv->disposition == 'A') {
+ /* this had better be raid1.
+ * As we are "--re-add"ing we must find a spare slot
+ * to fill.
+ */
+ char *used = xcalloc(array->raid_disks, 1);
+ for (j = 0; j < tst->max_devs; j++) {
+ mdu_disk_info_t disc2;
+ disc2.number = j;
+ if (md_get_disk_info(fd, &disc2))
+ continue;
+ if (disc2.major==0 && disc2.minor==0)
+ continue;
+ if (disc2.state & 8) /* removed */
+ continue;
+ if (disc2.raid_disk < 0)
+ continue;
+ if (disc2.raid_disk > array->raid_disks)
+ continue;
+ used[disc2.raid_disk] = 1;
+ }
+ for (j = 0 ; j < array->raid_disks; j++)
+ if (!used[j]) {
+ disc.raid_disk = j;
+ disc.state |= (1<<MD_DISK_SYNC);
+ break;
+ }
+ free(used);
+ }
+
+ if (array->state & (1 << MD_SB_CLUSTERED)) {
+ if (dv->disposition == 'c')
+ disc.state |= (1 << MD_DISK_CANDIDATE);
+ else
+ disc.state |= (1 << MD_DISK_CLUSTER_ADD);
+ }
+
+ if (dv->writemostly == FlagSet)
+ disc.state |= (1 << MD_DISK_WRITEMOSTLY);
+ if (dv->failfast == FlagSet)
+ disc.state |= (1 << MD_DISK_FAILFAST);
+ if (tst->ss->external) {
+ /* add a disk
+ * to an external metadata container */
+ struct mdinfo new_mdi;
+ struct mdinfo *sra;
+ int container_fd;
+ char devnm[32];
+ int dfd;
+
+ strcpy(devnm, fd2devnm(fd));
+
+ container_fd = open_dev_excl(devnm);
+ if (container_fd < 0) {
+ pr_err("add failed for %s: could not get exclusive access to container\n",
+ dv->devname);
+ tst->ss->free_super(tst);
+ goto unlock;
+ }
+
+ /* Check if metadata handler is able to accept the drive */
+ if (!tst->ss->validate_geometry(tst, LEVEL_CONTAINER, 0, 1, NULL,
+ 0, 0, dv->devname, NULL, 0, 1)) {
+ close(container_fd);
+ goto unlock;
+ }
+
+ Kill(dv->devname, NULL, 0, -1, 0);
+ dfd = dev_open(dv->devname, O_RDWR | O_EXCL|O_DIRECT);
+ if (tst->ss->add_to_super(tst, &disc, dfd,
+ dv->devname, INVALID_SECTORS)) {
+ close(dfd);
+ close(container_fd);
+ goto unlock;
+ }
+ if (!mdmon_running(tst->container_devnm))
+ tst->ss->sync_metadata(tst);
+
+ sra = sysfs_read(container_fd, NULL, 0);
+ if (!sra) {
+ pr_err("add failed for %s: sysfs_read failed\n",
+ dv->devname);
+ close(container_fd);
+ tst->ss->free_super(tst);
+ goto unlock;
+ }
+ sra->array.level = LEVEL_CONTAINER;
+ /* Need to set data_offset and component_size */
+ tst->ss->getinfo_super(tst, &new_mdi, NULL);
+ new_mdi.disk.major = disc.major;
+ new_mdi.disk.minor = disc.minor;
+ new_mdi.recovery_start = 0;
+ /* Make sure fds are closed as they are O_EXCL which
+ * would block add_disk */
+ tst->ss->free_super(tst);
+ if (sysfs_add_disk(sra, &new_mdi, 0) != 0) {
+ pr_err("add new device to external metadata failed for %s\n", dv->devname);
+ close(container_fd);
+ sysfs_free(sra);
+ goto unlock;
+ }
+ ping_monitor(devnm);
+ sysfs_free(sra);
+ close(container_fd);
+ } else {
+ tst->ss->free_super(tst);
+ if (ioctl(fd, ADD_NEW_DISK, &disc)) {
+ if (dv->disposition == 'j')
+ pr_err("Failed to hot add %s as journal, "
+ "please try restart %s.\n", dv->devname, devname);
+ else
+ pr_err("add new device failed for %s as %d: %s\n",
+ dv->devname, j, strerror(errno));
+ goto unlock;
+ }
+ if (dv->disposition == 'j') {
+ pr_err("Journal added successfully, making %s read-write\n", devname);
+ if (Manage_ro(devname, fd, -1))
+ pr_err("Failed to make %s read-write\n", devname);
+ }
+
+ }
+ if (verbose >= 0)
+ pr_err("added %s\n", dv->devname);
+ map_unlock(&map);
+ return 1;
+unlock:
+ map_unlock(&map);
+ return -1;
+}
+
+int Manage_remove(struct supertype *tst, int fd, struct mddev_dev *dv,
+ int sysfd, unsigned long rdev, int force, int verbose, char *devname)
+{
+ int lfd = -1;
+ int err;
+
+ if (tst->ss->external) {
+ /* To remove a device from a container, we must
+ * check that it isn't in use in an array.
+ * This involves looking in the 'holders'
+ * directory - there must be just one entry,
+ * the container.
+ * To ensure that it doesn't get used as a
+ * hot spare while we are checking, we
+ * get an O_EXCL open on the container
+ */
+ int ret;
+ char devnm[32];
+ strcpy(devnm, fd2devnm(fd));
+ lfd = open_dev_excl(devnm);
+ if (lfd < 0) {
+ pr_err("Cannot get exclusive access to container - odd\n");
+ return -1;
+ }
+ /* We may not be able to check on holders in
+ * sysfs, either because we don't have the dev num
+ * (rdev == 0) or because the device has been detached
+ * and the 'holders' directory no longer exists
+ * (ret == -1). In that case, assume it is OK to
+ * remove.
+ */
+ if (rdev == 0)
+ ret = -1;
+ else {
+ /*
+ * The drive has already been set to 'faulty', however
+ * monitor might not have had time to process it and the
+ * drive might still have an entry in the 'holders'
+ * directory. Try a few times to avoid a false error
+ */
+ int count = 20;
+
+ do {
+ ret = sysfs_unique_holder(devnm, rdev);
+ if (ret < 2)
+ break;
+ sleep_for(0, MSEC_TO_NSEC(100), true);
+ } while (--count > 0);
+
+ if (ret == 0) {
+ pr_err("%s is not a member, cannot remove.\n",
+ dv->devname);
+ close(lfd);
+ return -1;
+ }
+ if (ret >= 2) {
+ pr_err("%s is still in use, cannot remove.\n",
+ dv->devname);
+ close(lfd);
+ return -1;
+ }
+ }
+ }
+ /* FIXME check that it is a current member */
+ if (sysfd >= 0) {
+ /* device has been removed and we don't know
+ * the major:minor number
+ */
+ err = sys_hot_remove_disk(sysfd, force);
+ } else {
+ err = hot_remove_disk(fd, rdev, force);
+ if (err && errno == ENODEV) {
+ /* Old kernels rejected this if no personality
+ * is registered */
+ struct mdinfo *sra = sysfs_read(fd, NULL, GET_DEVS);
+ struct mdinfo *dv = NULL;
+ if (sra)
+ dv = sra->devs;
+ for ( ; dv ; dv=dv->next)
+ if (dv->disk.major == (int)major(rdev) &&
+ dv->disk.minor == (int)minor(rdev))
+ break;
+ if (dv)
+ err = sysfs_set_str(sra, dv,
+ "state", "remove");
+ else
+ err = -1;
+ sysfs_free(sra);
+ }
+ }
+ if (err) {
+ pr_err("hot remove failed for %s: %s\n", dv->devname,
+ strerror(errno));
+ if (lfd >= 0)
+ close(lfd);
+ return -1;
+ }
+ if (tst->ss->external) {
+ /*
+ * Before dropping our exclusive open we make an
+ * attempt at preventing mdmon from seeing an
+ * 'add' event before reconciling this 'remove'
+ * event.
+ */
+ char *devnm = fd2devnm(fd);
+
+ if (!devnm) {
+ pr_err("unable to get container name\n");
+ return -1;
+ }
+
+ ping_manager(devnm);
+ }
+ if (lfd >= 0)
+ close(lfd);
+ if (verbose >= 0)
+ pr_err("hot removed %s from %s\n",
+ dv->devname, devname);
+ return 1;
+}
+
+int Manage_replace(struct supertype *tst, int fd, struct mddev_dev *dv,
+ unsigned long rdev, int verbose, char *devname)
+{
+ struct mdinfo *mdi, *di;
+ if (tst->ss->external) {
+ pr_err("--replace only supported for native metadata (0.90 or 1.x)\n");
+ return -1;
+ }
+ /* Need to find the device in sysfs and add 'want_replacement' to the
+ * status.
+ */
+ mdi = sysfs_read(fd, NULL, GET_DEVS);
+ if (!mdi || !mdi->devs) {
+ pr_err("Cannot find status of %s to enable replacement - strange\n",
+ devname);
+ return -1;
+ }
+ for (di = mdi->devs; di; di = di->next)
+ if (di->disk.major == (int)major(rdev) &&
+ di->disk.minor == (int)minor(rdev))
+ break;
+ if (di) {
+ int rv;
+ if (di->disk.raid_disk < 0) {
+ pr_err("%s is not active and so cannot be replaced.\n",
+ dv->devname);
+ sysfs_free(mdi);
+ return -1;
+ }
+ rv = sysfs_set_str(mdi, di,
+ "state", "want_replacement");
+ if (rv) {
+ sysfs_free(mdi);
+ pr_err("Failed to request replacement for %s\n",
+ dv->devname);
+ return -1;
+ }
+ if (verbose >= 0)
+ pr_err("Marked %s (device %d in %s) for replacement\n",
+ dv->devname, di->disk.raid_disk, devname);
+ /* If there is a matching 'with', we need to tell it which
+ * raid disk
+ */
+ while (dv && dv->disposition != 'W')
+ dv = dv->next;
+ if (dv) {
+ dv->disposition = 'w';
+ dv->used = di->disk.raid_disk;
+ }
+ return 1;
+ }
+ sysfs_free(mdi);
+ pr_err("%s not found in %s so cannot --replace it\n",
+ dv->devname, devname);
+ return -1;
+}
+
+int Manage_with(struct supertype *tst, int fd, struct mddev_dev *dv,
+ unsigned long rdev, int verbose, char *devname)
+{
+ struct mdinfo *mdi, *di;
+ /* try to set 'slot' for 'rdev' in 'fd' to 'dv->used' */
+ mdi = sysfs_read(fd, NULL, GET_DEVS|GET_STATE);
+ if (!mdi || !mdi->devs) {
+ pr_err("Cannot find status of %s to enable replacement - strange\n",
+ devname);
+ return -1;
+ }
+ for (di = mdi->devs; di; di = di->next)
+ if (di->disk.major == (int)major(rdev) &&
+ di->disk.minor == (int)minor(rdev))
+ break;
+ if (di) {
+ int rv;
+ if (di->disk.state & (1<<MD_DISK_FAULTY)) {
+ pr_err("%s is faulty and cannot be a replacement\n",
+ dv->devname);
+ sysfs_free(mdi);
+ return -1;
+ }
+ if (di->disk.raid_disk >= 0) {
+ pr_err("%s is active and cannot be a replacement\n",
+ dv->devname);
+ sysfs_free(mdi);
+ return -1;
+ }
+ rv = sysfs_set_num(mdi, di,
+ "slot", dv->used);
+ if (rv) {
+ sysfs_free(mdi);
+ pr_err("Failed to set %s as preferred replacement.\n",
+ dv->devname);
+ return -1;
+ }
+ if (verbose >= 0)
+ pr_err("Marked %s in %s as replacement for device %d\n",
+ dv->devname, devname, dv->used);
+ return 1;
+ }
+ sysfs_free(mdi);
+ pr_err("%s not found in %s so cannot make it preferred replacement\n",
+ dv->devname, devname);
+ return -1;
+}
+
+/**
+ * is_remove_safe() - Check if remove is safe.
+ * @array: Array info.
+ * @fd: Array file descriptor.
+ * @devname: Name of device to remove.
+ * @verbose: Verbose.
+ *
+ * The function determines if array will be operational
+ * after removing &devname.
+ *
+ * Return: True if array will be operational, false otherwise.
+ */
+bool is_remove_safe(mdu_array_info_t *array, const int fd, char *devname, const int verbose)
+{
+ dev_t devid = devnm2devid(devname + 5);
+ struct mdinfo *mdi = sysfs_read(fd, NULL, GET_DEVS | GET_DISKS | GET_STATE);
+
+ if (!mdi) {
+ if (verbose)
+ pr_err("Failed to read sysfs attributes for %s\n", devname);
+ return false;
+ }
+
+ char *avail = xcalloc(array->raid_disks, sizeof(char));
+
+ for (mdi = mdi->devs; mdi; mdi = mdi->next) {
+ if (mdi->disk.raid_disk < 0)
+ continue;
+ if (!(mdi->disk.state & (1 << MD_DISK_SYNC)))
+ continue;
+ if (makedev(mdi->disk.major, mdi->disk.minor) == devid)
+ continue;
+ avail[mdi->disk.raid_disk] = 1;
+ }
+ sysfs_free(mdi);
+
+ bool is_enough = enough(array->level, array->raid_disks,
+ array->layout, 1, avail);
+
+ free(avail);
+ return is_enough;
+}
+
+/**
+ * Manage_subdevs() - Execute operation depending on devmode.
+ *
+ * @devname: name of the device.
+ * @fd: file descriptor.
+ * @devlist: list of sub-devices to manage.
+ * @verbose: verbose level.
+ * @test: test flag.
+ * @update: type of update.
+ * @force: force flag.
+ *
+ * This function executes operation defined by devmode
+ * for each dev from devlist.
+ * Devmode can be:
+ * 'a' - add the device
+ * 'S' - add the device as a spare - don't try re-add
+ * 'j' - add the device as a journal device
+ * 'A' - re-add the device
+ * 'r' - remove the device: HOT_REMOVE_DISK
+ * device can be 'faulty' or 'detached' in which case all
+ * matching devices are removed.
+ * 'f' - set the device faulty SET_DISK_FAULTY
+ * device can be 'detached' in which case any device that
+ * is inaccessible will be marked faulty.
+ * 'I' - remove device by using incremental fail
+ * which is executed when device is removed surprisingly.
+ * 'R' - mark this device as wanting replacement.
+ * 'W' - this device is added if necessary and activated as
+ * a replacement for a previous 'R' device.
+ * -----
+ * 'w' - 'W' will be changed to 'w' when it is paired with
+ * a 'R' device. If a 'W' is found while walking the list
+ * it must be unpaired, and is an error.
+ * 'M' - this is created by a 'missing' target. It is a slight
+ * variant on 'A'
+ * 'F' - Another variant of 'A', where the device was faulty
+ * so must be removed from the array first.
+ * 'c' - confirm the device as found (for clustered environments)
+ *
+ * For 'f' and 'r', the device can also be a kernel-internal
+ * name such as 'sdb'.
+ *
+ * Return: 0 on success, otherwise 1 or 2.
+ */
+int Manage_subdevs(char *devname, int fd,
+ struct mddev_dev *devlist, int verbose, int test,
+ enum update_opt update, int force)
+{
+ mdu_array_info_t array;
+ unsigned long long array_size;
+ struct mddev_dev *dv;
+ int tfd = -1;
+ struct supertype *tst = NULL;
+ char *subarray = NULL;
+ int sysfd = -1;
+ int count = 0; /* number of actions taken */
+ struct mdinfo info;
+ struct mdinfo devinfo;
+ int frozen = 0;
+ int busy = 0;
+ int raid_slot = -1;
+
+ if (sysfs_init(&info, fd, NULL)) {
+ pr_err("sysfs not availabile for %s\n", devname);
+ goto abort;
+ }
+
+ if (md_get_array_info(fd, &array)) {
+ pr_err("Cannot get array info for %s\n", devname);
+ goto abort;
+ }
+ /* array.size is only 32 bits and may be truncated.
+ * So read from sysfs if possible, and record number of sectors
+ */
+
+ array_size = get_component_size(fd);
+ if (array_size <= 0)
+ array_size = array.size * 2;
+
+ tst = super_by_fd(fd, &subarray);
+ if (!tst) {
+ pr_err("unsupport array - version %d.%d\n",
+ array.major_version, array.minor_version);
+ goto abort;
+ }
+
+ for (dv = devlist; dv; dv = dv->next) {
+ dev_t rdev = 0; /* device to add/remove etc */
+ int rv;
+ int mj,mn;
+
+ raid_slot = -1;
+ if (dv->disposition == 'c') {
+ rv = parse_cluster_confirm_arg(dv->devname,
+ &dv->devname,
+ &raid_slot);
+ if (rv) {
+ pr_err("Could not get the devname of cluster\n");
+ goto abort;
+ }
+ }
+
+ if (strcmp(dv->devname, "failed") == 0 ||
+ strcmp(dv->devname, "faulty") == 0) {
+ if (dv->disposition != 'A' && dv->disposition != 'r') {
+ pr_err("%s only meaningful with -r or --re-add, not -%c\n",
+ dv->devname, dv->disposition);
+ goto abort;
+ }
+ add_faulty(dv, fd, (dv->disposition == 'A'
+ ? 'F' : 'r'));
+ continue;
+ }
+ if (strcmp(dv->devname, "detached") == 0) {
+ if (dv->disposition != 'r' && dv->disposition != 'f') {
+ pr_err("%s only meaningful with -r of -f, not -%c\n",
+ dv->devname, dv->disposition);
+ goto abort;
+ }
+ add_detached(dv, fd, dv->disposition);
+ continue;
+ }
+
+ if (strcmp(dv->devname, "missing") == 0) {
+ struct mddev_dev *add_devlist;
+ struct mddev_dev **dp;
+ if (dv->disposition == 'c') {
+ rv = ioctl(fd, CLUSTERED_DISK_NACK, NULL);
+ break;
+ }
+
+ if (dv->disposition != 'A') {
+ pr_err("'missing' only meaningful with --re-add\n");
+ goto abort;
+ }
+ add_devlist = conf_get_devs();
+ if (add_devlist == NULL) {
+ pr_err("no devices to scan for missing members.\n");
+ continue;
+ }
+ for (dp = &add_devlist; *dp; dp = & (*dp)->next)
+ /* 'M' (for 'missing') is like 'A' without errors */
+ (*dp)->disposition = 'M';
+ *dp = dv->next;
+ dv->next = add_devlist;
+ continue;
+ }
+
+ if (strncmp(dv->devname, "set-", 4) == 0 &&
+ strlen(dv->devname) == 5) {
+ int copies;
+
+ if (dv->disposition != 'r' &&
+ dv->disposition != 'f') {
+ pr_err("'%s' only meaningful with -r or -f\n",
+ dv->devname);
+ goto abort;
+ }
+ if (array.level != 10) {
+ pr_err("'%s' only meaningful with RAID10 arrays\n",
+ dv->devname);
+ goto abort;
+ }
+ copies = ((array.layout & 0xff) *
+ ((array.layout >> 8) & 0xff));
+ if (array.raid_disks % copies != 0 ||
+ dv->devname[4] < 'A' ||
+ dv->devname[4] >= 'A' + copies ||
+ copies > 26) {
+ pr_err("'%s' not meaningful with this array\n",
+ dv->devname);
+ goto abort;
+ }
+ add_set(dv, fd, dv->devname[4]);
+ continue;
+ }
+
+ if (strchr(dv->devname, '/') == NULL &&
+ strchr(dv->devname, ':') == NULL &&
+ strlen(dv->devname) < 50) {
+ /* Assume this is a kernel-internal name like 'sda1' */
+ int found = 0;
+ char dname[55];
+ if (dv->disposition != 'r' && dv->disposition != 'f' &&
+ dv->disposition != 'I') {
+ pr_err("%s only meaningful with -r, -f or -I, not -%c\n",
+ dv->devname, dv->disposition);
+ goto abort;
+ }
+
+ sprintf(dname, "dev-%s", dv->devname);
+ sysfd = sysfs_open(fd2devnm(fd), dname, "block/dev");
+ if (sysfd >= 0) {
+ char dn[SYSFS_MAX_BUF_SIZE];
+ if (sysfs_fd_get_str(sysfd, dn, sizeof(dn)) > 0 &&
+ sscanf(dn, "%d:%d", &mj,&mn) == 2) {
+ rdev = makedev(mj,mn);
+ found = 1;
+ }
+ close(sysfd);
+ sysfd = -1;
+ }
+ if (!found) {
+ sysfd = sysfs_open(fd2devnm(fd), dname, "state");
+ if (sysfd < 0) {
+ pr_err("%s does not appear to be a component of %s\n",
+ dv->devname, devname);
+ goto abort;
+ }
+ }
+ } else if ((dv->disposition == 'r' ||
+ dv->disposition == 'f') &&
+ get_maj_min(dv->devname, &mj, &mn)) {
+ /* for 'fail' and 'remove', the device might
+ * not exist.
+ */
+ rdev = makedev(mj, mn);
+ } else {
+ tfd = dev_open(dv->devname, O_RDONLY);
+ if (tfd >= 0) {
+ fstat_is_blkdev(tfd, dv->devname, &rdev);
+ close(tfd);
+ } else {
+ int open_err = errno;
+ if (!stat_is_blkdev(dv->devname, &rdev)) {
+ if (dv->disposition == 'M')
+ /* non-fatal. Also improbable */
+ continue;
+ goto abort;
+ }
+ if (dv->disposition == 'r')
+ /* Be happy, the stat worked, that is
+ * enough for --remove
+ */
+ ;
+ else {
+ if (dv->disposition == 'M')
+ /* non-fatal */
+ continue;
+ pr_err("Cannot open %s: %s\n",
+ dv->devname, strerror(open_err));
+ goto abort;
+ }
+ }
+ }
+ switch(dv->disposition){
+ default:
+ pr_err("internal error - devmode[%s]=%d\n",
+ dv->devname, dv->disposition);
+ goto abort;
+ case 'a':
+ case 'S': /* --add-spare */
+ case 'j': /* --add-journal */
+ case 'A':
+ case 'M': /* --re-add missing */
+ case 'F': /* --re-add faulty */
+ case 'c': /* --cluster-confirm */
+ /* add the device */
+ if (subarray) {
+ pr_err("Cannot add disks to a \'member\' array, perform this operation on the parent container\n");
+ goto abort;
+ }
+
+ /* Let's first try to write re-add to sysfs */
+ if (rdev != 0 &&
+ (dv->disposition == 'A' || dv->disposition == 'F')) {
+ sysfs_init_dev(&devinfo, rdev);
+ if (sysfs_set_str(&info, &devinfo, "state", "re-add") == 0) {
+ pr_err("re-add %s to %s succeed\n",
+ dv->devname, info.sys_name);
+ break;
+ }
+ }
+
+ if (dv->disposition == 'F')
+ /* Need to remove first */
+ hot_remove_disk(fd, rdev, force);
+ /* Make sure it isn't in use (in 2.6 or later) */
+ tfd = dev_open(dv->devname, O_RDONLY|O_EXCL);
+ if (tfd >= 0) {
+ /* We know no-one else is using it. We'll
+ * need non-exclusive access to add it, so
+ * do that now.
+ */
+ close(tfd);
+ tfd = dev_open(dv->devname, O_RDONLY);
+ }
+ if (tfd < 0) {
+ if (dv->disposition == 'M')
+ continue;
+ pr_err("Cannot open %s: %s\n",
+ dv->devname, strerror(errno));
+ goto abort;
+ }
+ if (!frozen) {
+ if (sysfs_freeze_array(&info) == 1)
+ frozen = 1;
+ else
+ frozen = -1;
+ }
+ rv = Manage_add(fd, tfd, dv, tst, &array,
+ force, verbose, devname, update,
+ rdev, array_size, raid_slot);
+ close(tfd);
+ tfd = -1;
+ if (rv < 0)
+ goto abort;
+ if (rv > 0)
+ count++;
+ break;
+
+ case 'r':
+ /* hot remove */
+ if (subarray) {
+ pr_err("Cannot remove disks from a \'member\' array, perform this operation on the parent container\n");
+ rv = -1;
+ } else
+ rv = Manage_remove(tst, fd, dv, sysfd,
+ rdev, verbose, force,
+ devname);
+ if (sysfd >= 0)
+ close(sysfd);
+ sysfd = -1;
+ if (rv < 0)
+ goto abort;
+ if (rv > 0)
+ count++;
+ break;
+
+ case 'f': /* set faulty */
+ if (!is_remove_safe(&array, fd, dv->devname, verbose)) {
+ pr_err("Cannot remove %s from %s, array will be failed.\n",
+ dv->devname, devname);
+ if (sysfd >= 0)
+ close(sysfd);
+ goto abort;
+ }
+ case 'I': /* incremental fail */
+ if ((sysfd >= 0 && write(sysfd, "faulty", 6) != 6) ||
+ (sysfd < 0 && ioctl(fd, SET_DISK_FAULTY,
+ rdev))) {
+ if (errno == EBUSY)
+ busy = 1;
+ pr_err("set device faulty failed for %s: %s\n",
+ dv->devname, strerror(errno));
+ if (sysfd >= 0)
+ close(sysfd);
+ goto abort;
+ }
+ if (sysfd >= 0)
+ close(sysfd);
+ sysfd = -1;
+ count++;
+ if (verbose >= 0)
+ pr_err("set %s faulty in %s\n",
+ dv->devname, devname);
+ break;
+ case 'R': /* Mark as replaceable */
+ if (subarray) {
+ pr_err("Cannot replace disks in a \'member\' array, perform this operation on the parent container\n");
+ rv = -1;
+ } else {
+ if (!frozen) {
+ if (sysfs_freeze_array(&info) == 1)
+ frozen = 1;
+ else
+ frozen = -1;
+ }
+ rv = Manage_replace(tst, fd, dv,
+ rdev, verbose,
+ devname);
+ }
+ if (rv < 0)
+ goto abort;
+ if (rv > 0)
+ count++;
+ break;
+ case 'W': /* --with device that doesn't match */
+ pr_err("No matching --replace device for --with %s\n",
+ dv->devname);
+ goto abort;
+ case 'w': /* --with device which was matched */
+ rv = Manage_with(tst, fd, dv,
+ rdev, verbose, devname);
+ if (rv < 0)
+ goto abort;
+ break;
+ }
+ }
+ free(tst);
+ if (frozen > 0)
+ sysfs_set_str(&info, NULL, "sync_action","idle");
+ if (test && count == 0)
+ return 2;
+ return 0;
+
+abort:
+ free(tst);
+ if (frozen > 0)
+ sysfs_set_str(&info, NULL, "sync_action","idle");
+ return !test && busy ? 2 : 1;
+}
+
+int autodetect(void)
+{
+ /* Open any md device, and issue the RAID_AUTORUN ioctl */
+ int rv = 1;
+ int fd = dev_open("9:0", O_RDONLY);
+ if (fd >= 0) {
+ if (ioctl(fd, RAID_AUTORUN, 0) == 0)
+ rv = 0;
+ close(fd);
+ }
+ return rv;
+}
+
+int Update_subarray(char *dev, char *subarray, enum update_opt update,
+ struct mddev_ident *ident, int verbose)
+{
+ struct supertype supertype, *st = &supertype;
+ int fd, rv = 2;
+ struct mdinfo *info = NULL;
+ char *update_verb = map_num(update_options, update);
+ bool allow_active = update == UOPT_PPL || update == UOPT_NO_PPL;
+
+ memset(st, 0, sizeof(*st));
+
+ fd = open_subarray(dev, subarray, st, verbose < 0);
+ if (fd < 0)
+ return 2;
+
+ if (!st->ss->update_subarray) {
+ if (verbose >= 0)
+ pr_err("Operation not supported for %s metadata\n",
+ st->ss->name);
+ goto free_super;
+ }
+
+ if (!allow_active && is_subarray_active(subarray, st->devnm)) {
+ if (verbose >= 0)
+ pr_err("Subarray %s in %s is active, cannot update %s\n",
+ subarray, dev, update_verb);
+ goto free_super;
+ }
+
+ if (mdmon_running(st->devnm))
+ st->update_tail = &st->updates;
+
+ info = st->ss->container_content(st, subarray);
+
+ if (update == UOPT_PPL && !is_level456(info->array.level)) {
+ pr_err("RWH policy ppl is supported only for raid4, raid5 and raid6.\n");
+ goto free_super;
+ }
+
+ rv = st->ss->update_subarray(st, subarray, update, ident);
+
+ if (rv) {
+ if (verbose >= 0)
+ pr_err("Failed to update %s of subarray-%s in %s\n",
+ update_verb, subarray, dev);
+ } else if (st->update_tail)
+ flush_metadata_updates(st);
+ else
+ st->ss->sync_metadata(st);
+
+ if (rv == 0 && update == UOPT_NAME && verbose >= 0)
+ pr_err("Updated subarray-%s name from %s, UUIDs may have changed\n",
+ subarray, dev);
+
+free_super:
+ if (info)
+ free(info);
+ st->ss->free_super(st);
+ close(fd);
+
+ return rv;
+}
+
+/* Move spare from one array to another If adding to destination array fails
+ * add back to original array.
+ * Returns 1 on success, 0 on failure */
+int move_spare(char *from_devname, char *to_devname, dev_t devid)
+{
+ struct mddev_dev devlist;
+ char devname[20];
+
+ /* try to remove and add */
+ int fd1 = open(to_devname, O_RDONLY);
+ int fd2 = open(from_devname, O_RDONLY);
+
+ if (fd1 < 0 || fd2 < 0) {
+ if (fd1 >= 0)
+ close(fd1);
+ if (fd2 >= 0)
+ close(fd2);
+ return 0;
+ }
+
+ devlist.next = NULL;
+ devlist.used = 0;
+ devlist.writemostly = FlagDefault;
+ devlist.failfast = FlagDefault;
+ devlist.devname = devname;
+ sprintf(devname, "%d:%d", major(devid), minor(devid));
+
+ devlist.disposition = 'r';
+ if (Manage_subdevs(from_devname, fd2, &devlist, -1, 0, UOPT_UNDEFINED, 0) == 0) {
+ devlist.disposition = 'a';
+ if (Manage_subdevs(to_devname, fd1, &devlist, -1, 0,
+ UOPT_UNDEFINED, 0) == 0) {
+ /* make sure manager is aware of changes */
+ ping_manager(to_devname);
+ ping_manager(from_devname);
+ close(fd1);
+ close(fd2);
+ return 1;
+ }
+ else
+ Manage_subdevs(from_devname, fd2, &devlist,
+ -1, 0, UOPT_UNDEFINED, 0);
+ }
+ close(fd1);
+ close(fd2);
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-16 15:54:46 +0000