/*
* mdadm - manage Linux "md" devices aka RAID arrays.
*
- * Copyright (C) 2001-2012 Neil Brown <neilb@suse.de>
+ * Copyright (C) 2001-2013 Neil Brown <neilb@suse.de>
*
*
* This program is free software; you can redistribute it and/or modify
#include "mdadm.h"
#include "dlink.h"
#include <sys/mman.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <signal.h>
+#include <sys/wait.h>
#if ! defined(__BIG_ENDIAN) && ! defined(__LITTLE_ENDIAN)
#error no endian defined
#include "md_u.h"
#include "md_p.h"
-#ifndef offsetof
-#define offsetof(t,f) ((size_t)&(((t*)0)->f))
-#endif
-
int restore_backup(struct supertype *st,
struct mdinfo *content,
int working_disks,
int next_spare,
- char *backup_file,
+ char **backup_filep,
int verbose)
{
int i;
struct mdinfo *dev;
int err;
int disk_count = next_spare + working_disks;
+ char *backup_file = *backup_filep;
dprintf("Called restore_backup()\n");
fdlist = xmalloc(sizeof(int) * disk_count);
+ enable_fds(next_spare);
for (i = 0; i < next_spare; i++)
fdlist[i] = -1;
for (dev = content->devs; dev; dev = dev->next) {
fdlist[next_spare++] = fd;
}
+ if (!backup_file) {
+ backup_file = locate_backup(content->sys_name);
+ *backup_filep = backup_file;
+ }
+
if (st->ss->external && st->ss->recover_backup)
err = st->ss->recover_backup(st, content);
else
"with %s metadata\n", st->ss->name);
return 1;
}
- mdi = sysfs_read(fd, -1, GET_BITMAP_LOCATION);
+ mdi = sysfs_read(fd, NULL, GET_BITMAP_LOCATION);
if (mdi)
offset_setable = 1;
for (d=0; d< st->max_devs; d++) {
}
if (offset_setable) {
st->ss->getinfo_super(st, mdi, NULL);
- sysfs_init(mdi, fd, -1);
+ sysfs_init(mdi, fd, NULL);
rv = sysfs_set_num_signed(mdi, NULL, "bitmap/location",
mdi->bitmap_offset);
} else {
/* Check that all member arrays for this container, or the
* container of this array, are idle
*/
- int container_dev = (st->container_dev != NoMdDev
- ? st->container_dev : st->devnum);
- char container[40];
+ char *container = (st->container_devnm[0]
+ ? st->container_devnm : st->devnm);
struct mdstat_ent *ent, *e;
int is_idle = 1;
- fmt_devname(container, container_dev);
ent = mdstat_read(0, 0);
for (e = ent ; e; e = e->next) {
if (!is_container_member(e, container))
static int freeze_container(struct supertype *st)
{
- int container_dev = (st->container_dev != NoMdDev
- ? st->container_dev : st->devnum);
- char container[40];
+ char *container = (st->container_devnm[0]
+ ? st->container_devnm : st->devnm);
if (!check_idle(st))
return -1;
- fmt_devname(container, container_dev);
-
if (block_monitor(container, 1)) {
pr_err("failed to freeze container\n");
return -2;
static void unfreeze_container(struct supertype *st)
{
- int container_dev = (st->container_dev != NoMdDev
- ? st->container_dev : st->devnum);
- char container[40];
-
- fmt_devname(container, container_dev);
+ char *container = (st->container_devnm[0]
+ ? st->container_devnm : st->devnm);
unblock_monitor(container, 1);
}
if (st->ss->external)
return freeze_container(st);
else {
- struct mdinfo *sra = sysfs_read(-1, st->devnum, GET_VERSION);
+ struct mdinfo *sra = sysfs_read(-1, st->devnm, GET_VERSION);
int err;
char buf[20];
if (st->ss->external)
return unfreeze_container(st);
else {
- struct mdinfo *sra = sysfs_read(-1, st->devnum, GET_VERSION);
+ struct mdinfo *sra = sysfs_read(-1, st->devnm, GET_VERSION);
+ char buf[20];
- if (sra)
+ if (sra &&
+ sysfs_get_str(sra, NULL, "sync_action", buf, 20) > 0
+ && strcmp(buf, "frozen\n") == 0) {
+ printf("unfreeze\n");
sysfs_set_str(sra, NULL, "sync_action", "idle");
+ }
sysfs_free(sra);
}
}
if (fd < 0)
return;
- while (sysfs_fd_get_str(fd, action, 20) > 0 &&
- strncmp(action, "reshape", 7) == 0) {
- fd_set rfds;
- FD_ZERO(&rfds);
- FD_SET(fd, &rfds);
- select(fd+1, NULL, NULL, &rfds, NULL);
- }
+ while (sysfs_fd_get_str(fd, action, 20) > 0 &&
+ strncmp(action, "reshape", 7) == 0)
+ sysfs_wait(fd, NULL);
close(fd);
}
sysfs_set_num(sra, NULL, "suspend_hi", 0);
sysfs_set_num(sra, NULL, "suspend_lo", 0);
sysfs_set_num(sra, NULL, "sync_min", 0);
- sysfs_set_str(sra, NULL, "sync_max", "max");
+ // It isn't safe to reset sync_max as we aren't monitoring.
+ // Array really should be stopped at this point.
}
int remove_disks_for_takeover(struct supertype *st,
int d = 0;
struct mdinfo *sd;
+ enable_fds(nrdisks);
for (d = 0; d <= nrdisks; d++)
fdlist[d] = -1;
d = raid_disks;
long blocks,
int *fdlist,
unsigned long long *offsets,
+ char *sys_name,
int restart)
{
/* Return 1 on success, 0 on any form of failure */
return 0;
}
- return 1;
-}
-
-unsigned long GCD(unsigned long a, unsigned long b)
-{
- while (a != b) {
- if (a < b)
- b -= a;
- if (b < a)
- a -= b;
+ if (!restart && strncmp(backup_file, MAP_DIR, strlen(MAP_DIR)) != 0) {
+ char *bu = make_backup(sys_name);
+ if (symlink(backup_file, bu))
+ pr_err("Recording backup file in " MAP_DIR "failed: %s\n",
+ strerror(errno));
+ free(bu);
}
- return a;
+
+ return 1;
}
unsigned long compute_backup_blocks(int nchunk, int ochunk,
return blocks;
}
-char *analyse_change(struct mdinfo *info, struct reshape *re)
+char *analyse_change(char *devname, struct mdinfo *info, struct reshape *re)
{
/* Based on the current array state in info->array and
* the changes in info->new_* etc, determine:
*/
int delta_parity = 0;
+ memset(re, 0, sizeof(*re));
+
/* If a new level not explicitly given, we assume no-change */
if (info->new_level == UnSet)
info->new_level = info->array.level;
/* chunk size is meaningful, must divide component_size
* evenly
*/
- if (info->component_size % (info->new_chunk/512))
- return "New chunk size does not"
- " divide component size";
+ if (info->component_size % (info->new_chunk/512)) {
+ unsigned long long shrink = info->component_size;
+ shrink &= ~(unsigned long long)(info->new_chunk/512-1);
+ pr_err("New chunk size (%dK) does not evenly divide device size (%lluk)\n",
+ info->new_chunk/1024, info->component_size/2);
+ pr_err("After shrinking any filesystem, \"mdadm --grow %s --size %llu\"\n",
+ devname, shrink/2);
+ pr_err("will shrink the array so the given chunk size would work.\n");
+ return "";
+ }
break;
default:
return "chunk size not meaningful for this level";
switch (info->array.level) {
default:
- return "Cannot understand this RAID level";
+ return "No reshape is possibly for this RAID level";
+ case LEVEL_LINEAR:
+ if (info->delta_disks != UnSet)
+ return "Only --add is supported for LINEAR, setting --raid-disks is not needed";
+ else
+ return "Only --add is supported for LINEAR, other --grow options are not meaningful";
case 1:
/* RAID1 can convert to RAID1 with different disks, or
* raid5 with 2 disks, or
re->level = 0;
re->before.data_disks = 1;
re->after.data_disks = 1;
- re->before.layout = 0;
- re->backup_blocks = 0;
- re->parity = 0;
return NULL;
}
if (info->new_level == 1) {
/* Don't know what to do */
return "no change requested for Growing RAID1";
re->level = 1;
- re->backup_blocks = 0;
- re->parity = 0;
return NULL;
}
if (info->array.raid_disks == 2 &&
/* looks good */
re->level = 0;
- re->parity = 0;
re->before.data_disks = new_disks;
re->after.data_disks = re->before.data_disks;
- re->before.layout = 0;
- re->backup_blocks = 0;
return NULL;
case 10:
new_chunk = info->new_chunk * far;
re->level = 10;
- re->parity = 0;
re->before.layout = info->array.layout;
re->before.data_disks = info->array.raid_disks;
re->after.layout = info->new_layout;
re->after.data_disks = new_disks;
- /* For RAID10 we don't do backup, and there is
- * no need to synchronise stripes on both
+ /* For RAID10 we don't do backup but do allow reshape,
+ * so set backup_blocks to INVALID_SECTORS rather than
+ * zero.
+ * And there is no need to synchronise stripes on both
* 'old' and 'new'. So the important
* number is the minimum data_offset difference
* which is the larger of (offset copies * chunk).
*/
-
- re->backup_blocks = max(old_chunk, new_chunk) / 512;
+ re->backup_blocks = INVALID_SECTORS;
+ re->min_offset_change = max(old_chunk, new_chunk) / 512;
if (new_disks < re->before.data_disks &&
- info->space_after < re->backup_blocks)
+ info->space_after < re->min_offset_change)
/* Reduce component size by one chunk */
re->new_size = (info->component_size -
- re->backup_blocks);
+ re->min_offset_change);
else
re->new_size = info->component_size;
re->new_size = re->new_size * new_disks / copies;
return "Cannot change chunk-size with RAID0->RAID10";
/* looks good */
re->level = 10;
- re->parity = 0;
re->before.data_disks = (info->array.raid_disks +
info->delta_disks);
re->after.data_disks = re->before.data_disks;
re->before.layout = info->new_layout;
- re->backup_blocks = 0;
return NULL;
}
delta_parity = 1;
re->level = 5;
re->before.layout = ALGORITHM_PARITY_N;
+ if (info->new_layout == UnSet)
+ info->new_layout = map_name(r5layout, "default");
break;
case 6:
delta_parity = 2;
re->level = 6;
re->before.layout = ALGORITHM_PARITY_N;
+ if (info->new_layout == UnSet)
+ info->new_layout = map_name(r6layout, "default");
break;
default:
return "Impossible level change requested";
return "Cannot set raid_disk when "
"converting RAID5->RAID1";
re->level = 1;
- re->backup_blocks = 0;
info->new_chunk = 0;
return NULL;
default:
switch (re->level) {
case 4:
+ re->before.layout = 0;
re->after.layout = 0;
break;
case 5:
/* So we have a restripe operation, we need to calculate the number
* of blocks per reshape operation.
*/
+ re->new_size = info->component_size * re->before.data_disks;
if (info->new_chunk == 0)
info->new_chunk = info->array.chunk_size;
if (re->after.data_disks == re->before.data_disks &&
re->after.layout == re->before.layout &&
info->new_chunk == info->array.chunk_size) {
- /* Nothing to change */
+ /* Nothing to change, can change level immediately. */
+ re->level = info->new_level;
re->backup_blocks = 0;
return NULL;
}
if (re->after.data_disks == 1 && re->before.data_disks == 1) {
/* chunk and layout changes make no difference */
+ re->level = info->new_level;
re->backup_blocks = 0;
return NULL;
}
info->new_chunk, info->array.chunk_size,
re->after.data_disks,
re->before.data_disks);
+ re->min_offset_change = re->backup_blocks / re->before.data_disks;
re->new_size = info->component_size * re->after.data_disks;
return NULL;
ret_val = 0;
dprintf("Array size changed");
}
- dprintf(" from %llu to %llu.\n",
- current_size, new_size);
+ dprintf_cont(" from %llu to %llu.\n",
+ current_size, new_size);
}
sysfs_free(info);
} else
struct supertype *st,
struct mdinfo *info,
int force,
- char *backup_file,
- int verbose, int restart, int freeze_reshape);
+ char *backup_file, int verbose,
+ int forked, int restart, int freeze_reshape);
int Grow_reshape(char *devname, int fd,
struct mddev_dev *devlist,
int frozen;
int changed = 0;
char *container = NULL;
- char container_buf[20];
int cfd = -1;
struct mddev_dev *dv;
struct mdinfo info;
struct mdinfo *sra;
-
if (ioctl(fd, GET_ARRAY_INFO, &array) < 0) {
- fprintf(stderr, Name ": %s is not an active md array - aborting\n",
+ pr_err("%s is not an active md array - aborting\n",
devname);
return 1;
}
- if (data_offset != INVALID_SECTORS && array.level != 10) {
+ if (data_offset != INVALID_SECTORS && array.level != 10
+ && (array.level < 4 || array.level > 6)) {
pr_err("--grow --data-offset not yet supported\n");
return 1;
}
* pre-requisite spare devices (mdmon owns final validation)
*/
if (st->ss->external) {
- int container_dev;
int rv;
if (subarray) {
- container_dev = st->container_dev;
- cfd = open_dev_excl(st->container_dev);
+ container = st->container_devnm;
+ cfd = open_dev_excl(st->container_devnm);
} else {
- container_dev = st->devnum;
+ container = st->devnm;
close(fd);
- cfd = open_dev_excl(st->devnum);
+ cfd = open_dev_excl(st->devnm);
fd = cfd;
}
if (cfd < 0) {
return 1;
}
- fmt_devname(container_buf, container_dev);
- container = container_buf;
-
rv = st->ss->load_container(st, cfd, NULL);
if (rv) {
pr_err("cannot reshape arrays in"
" container with unsupported"
" metadata: %s(%s)\n",
- devname, container_buf);
+ devname, container);
sysfs_free(cc);
free(subarray);
return 1;
}
sysfs_free(cc);
}
- if (mdmon_running(container_dev))
+ if (mdmon_running(container))
st->update_tail = &st->updates;
}
return 1;
}
- sra = sysfs_read(fd, 0, GET_LEVEL | GET_DISKS | GET_DEVS
+ sra = sysfs_read(fd, NULL, GET_LEVEL | GET_DISKS | GET_DEVS
| GET_STATE | GET_VERSION);
if (sra) {
if (st->ss->external && subarray == NULL) {
if (orig_size == 0)
orig_size = (unsigned) array.size;
+ if (orig_size == 0) {
+ pr_err("Cannot set device size in this type of array.\n");
+ rv = 1;
+ goto release;
+ }
+
if (reshape_super(st, s->size, UnSet, UnSet, 0, 0, UnSet, NULL,
devname, APPLY_METADATA_CHANGES, c->verbose > 0)) {
rv = 1;
}
/* make sure mdmon is
* aware of the new level */
- if (!mdmon_running(st->container_dev))
- start_mdmon(st->container_dev);
+ if (!mdmon_running(st->container_devnm))
+ start_mdmon(st->container_devnm);
ping_monitor(container);
- if (mdmon_running(st->container_dev) &&
+ if (mdmon_running(st->container_devnm) &&
st->update_tail == NULL)
st->update_tail = &st->updates;
}
if (s->size == MAX_SIZE)
s->size = 0;
array.size = s->size;
- if ((unsigned)array.size != s->size) {
+ if (s->size & ~INT32_MAX) {
/* got truncated to 32bit, write to
* component_size instead
*/
if ((s->level == UnSet || s->level == array.level) &&
(s->layout_str == NULL) &&
(s->chunk == 0 || s->chunk == array.chunk_size) &&
+ data_offset == INVALID_SECTORS &&
(s->raiddisks == 0 || s->raiddisks == array.raid_disks)) {
/* Nothing more to do */
if (!changed && c->verbose >= 0)
int err;
err = remove_disks_for_takeover(st, sra, array.layout);
if (err) {
- dprintf(Name": Array cannot be reshaped\n");
+ dprintf("Array cannot be reshaped\n");
if (cfd > -1)
close(cfd);
rv = 1;
memset(&info, 0, sizeof(info));
info.array = array;
- sysfs_init(&info, fd, NoMdDev);
+ sysfs_init(&info, fd, NULL);
strcpy(info.text_version, sra->text_version);
info.component_size = s->size*2;
info.new_level = s->level;
* performed at the level of the container
*/
rv = reshape_container(container, devname, -1, st, &info,
- c->force, c->backup_file, c->verbose, 0, 0);
+ c->force, c->backup_file, c->verbose, 0, 0, 0);
frozen = 0;
} else {
/* get spare devices from external metadata
char *ep;
unsigned long long position = strtoull(buf, &ep, 0);
- dprintf(Name": Read sync_max sysfs entry is: %s\n", buf);
+ dprintf("Read sync_max sysfs entry is: %s\n", buf);
if (!(ep == buf || (*ep != 0 && *ep != '\n' && *ep != ' '))) {
position *= get_data_disks(level,
info->new_layout,
return ret_val;
}
-static int raid10_reshape(char *container, int fd, char *devname,
- struct supertype *st, struct mdinfo *info,
- struct reshape *reshape,
- unsigned long long data_offset,
- int force, int verbose)
+static unsigned long long choose_offset(unsigned long long lo,
+ unsigned long long hi,
+ unsigned long long min,
+ unsigned long long max)
{
- /* Changing raid_disks, layout, chunksize or possibly
- * just data_offset for a RAID10.
- * We must always change data_offset. We change by at least
- * ->backup_blocks which is the largest of the old and new
- * chunk sizes.
- * If raid_disks is increasing, then data_offset must decrease
- * by at least this copy size.
- * If raid_disks is unchanged, data_offset must increase or
- * decrease by at least backup_blocks but preferably by much more.
- * We choose half of the available space.
- * If raid_disks is decreasing, data_offset must increase by
- * at least backup_blocks. To allow of this, component_size
- * must be decreased by the same amount.
+ /* Choose a new offset between hi and lo.
+ * It must be between min and max, but
+ * we would prefer something near the middle of hi/lo, and also
+ * prefer to be aligned to a big power of 2.
*
- * So we calculate the required minimum and direction, possibly
- * reduce the component_size, then iterate through the devices
- * and set the new_data_offset.
- * If that all works, we set chunk_size, layout, raid_disks, and start
- * 'reshape'
+ * So we start with the middle, then for each bit,
+ * starting at '1' and increasing, if it is set, we either
+ * add it or subtract it if possible, preferring the option
+ * which is furthest from the boundary.
+ *
+ * We stop once we get a 1MB alignment. As units are in sectors,
+ * 1MB = 2*1024 sectors.
*/
- struct mdinfo *sra, *sd;
- unsigned long long min;
- int dir = 0;
- int err = 0;
+ unsigned long long choice = (lo + hi) / 2;
+ unsigned long long bit = 1;
- sra = sysfs_read(fd, 0,
- GET_COMPONENT|GET_DEVS|GET_OFFSET|GET_STATE|GET_CHUNK
- );
- if (!sra) {
- fprintf(stderr, Name ": %s: Cannot get array details from sysfs\n",
- devname);
- goto release;
+ for (bit = 1; bit < 2*1024; bit = bit << 1) {
+ unsigned long long bigger, smaller;
+ if (! (bit & choice))
+ continue;
+ bigger = choice + bit;
+ smaller = choice - bit;
+ if (bigger > max && smaller < min)
+ break;
+ if (bigger > max)
+ choice = smaller;
+ else if (smaller < min)
+ choice = bigger;
+ else if (hi - bigger > smaller - lo)
+ choice = bigger;
+ else
+ choice = smaller;
}
- min = reshape->backup_blocks;
+ return choice;
+}
- if (info->delta_disks)
- sysfs_set_str(sra, NULL, "reshape_direction",
- info->delta_disks < 0 ? "backwards" : "forwards");
- if (info->delta_disks < 0 &&
- info->space_after < reshape->backup_blocks) {
- int rv = sysfs_set_num(sra, NULL, "component_size",
- (sra->component_size -
- reshape->backup_blocks)/2);
- if (rv) {
- fprintf(stderr, Name ": cannot reduce component size\n");
- goto release;
- }
- }
+static int set_new_data_offset(struct mdinfo *sra, struct supertype *st,
+ char *devname, int delta_disks,
+ unsigned long long data_offset,
+ unsigned long long min,
+ int can_fallback)
+{
+ struct mdinfo *sd;
+ int dir = 0;
+ int err = 0;
+ unsigned long long before, after;
+
+ /* Need to find min space before and after so same is used
+ * on all devices
+ */
+ before = UINT64_MAX;
+ after = UINT64_MAX;
for (sd = sra->devs; sd; sd = sd->next) {
char *dn;
int dfd;
dn = map_dev(sd->disk.major, sd->disk.minor, 0);
dfd = dev_open(dn, O_RDONLY);
if (dfd < 0) {
- fprintf(stderr,
- Name ": %s: cannot open component %s\n",
+ pr_err("%s: cannot open component %s\n",
devname, dn ? dn : "-unknown-");
- rv = -1;
goto release;
}
st2 = dup_super(st);
close(dfd);
if (rv) {
free(st2);
- fprintf(stderr, ": %s: cannot get superblock from %s\n",
+ pr_err("%s: cannot get superblock from %s\n",
devname, dn);
goto release;
}
st2->ss->getinfo_super(st2, &info2, NULL);
st2->ss->free_super(st2);
free(st2);
- if (info->delta_disks < 0) {
+ if (info2.space_before == 0 &&
+ info2.space_after == 0) {
+ /* Metadata doesn't support data_offset changes */
+ pr_err("%s: Metadata version doesn't support"
+ " data_offset changes\n", devname);
+ goto fallback;
+ }
+ if (before > info2.space_before)
+ before = info2.space_before;
+ if (after > info2.space_after)
+ after = info2.space_after;
+
+ if (data_offset != INVALID_SECTORS) {
+ if (dir == 0) {
+ if (info2.data_offset == data_offset) {
+ pr_err("%s: already has that data_offset\n",
+ dn);
+ goto release;
+ }
+ if (data_offset < info2.data_offset)
+ dir = -1;
+ else
+ dir = 1;
+ } else if ((data_offset <= info2.data_offset && dir == 1) ||
+ (data_offset >= info2.data_offset && dir == -1)) {
+ pr_err("%s: differing data offsets on devices make this --data-offset setting impossible\n",
+ dn);
+ goto release;
+ }
+ }
+ }
+ if (before == UINT64_MAX)
+ /* impossible really, there must be no devices */
+ return 1;
+
+ for (sd = sra->devs; sd; sd = sd->next) {
+ char *dn = map_dev(sd->disk.major, sd->disk.minor, 0);
+ unsigned long long new_data_offset;
+
+ if (sd->disk.state & (1<<MD_DISK_FAULTY))
+ continue;
+ if (delta_disks < 0) {
/* Don't need any space as array is shrinking
* just move data_offset up by min
*/
- if (data_offset == 1)
- info2.new_data_offset = info2.data_offset + min;
+ if (data_offset == INVALID_SECTORS)
+ new_data_offset = sd->data_offset + min;
else {
- if ((unsigned long long)data_offset
- < info2.data_offset + min) {
- fprintf(stderr, Name ": --data-offset too small for %s\n",
+ if (data_offset < sd->data_offset + min) {
+ pr_err("--data-offset too small for %s\n",
dn);
goto release;
}
- info2.new_data_offset = data_offset;
+ new_data_offset = data_offset;
}
- } else if (info->delta_disks > 0) {
+ } else if (delta_disks > 0) {
/* need space before */
- if (info2.space_before < min) {
- fprintf(stderr, Name ": Insufficient head-space for reshape on %s\n",
+ if (before < min) {
+ if (can_fallback)
+ goto fallback;
+ pr_err("Insufficient head-space for reshape on %s\n",
dn);
goto release;
}
- if (data_offset == 1)
- info2.new_data_offset = info2.data_offset - min;
+ if (data_offset == INVALID_SECTORS)
+ new_data_offset = sd->data_offset - min;
else {
- if ((unsigned long long)data_offset
- > info2.data_offset - min) {
- fprintf(stderr, Name ": --data-offset too large for %s\n",
+ if (data_offset > sd->data_offset - min) {
+ pr_err("--data-offset too large for %s\n",
dn);
goto release;
}
- info2.new_data_offset = data_offset;
+ new_data_offset = data_offset;
}
} else {
if (dir == 0) {
- /* can move up or down. 'data_offset'
- * might guide us, otherwise choose
- * direction with most space
+ /* can move up or down. If 'data_offset'
+ * was set we would have already decided,
+ * so just choose direction with most space.
*/
- if (data_offset == 1) {
- if (info2.space_before > info2.space_after)
- dir = -1;
- else
- dir = 1;
- } else if (data_offset < info2.data_offset)
+ if (before > after)
dir = -1;
else
dir = 1;
- sysfs_set_str(sra, NULL, "reshape_direction",
- dir == 1 ? "backwards" : "forwards");
}
- switch (dir) {
- case 1: /* Increase data offset */
- if (info2.space_after < min) {
- fprintf(stderr, Name ": Insufficient tail-space for reshape on %s\n",
+ sysfs_set_str(sra, NULL, "reshape_direction",
+ dir == 1 ? "backwards" : "forwards");
+ if (dir > 0) {
+ /* Increase data offset */
+ if (after < min) {
+ if (can_fallback)
+ goto fallback;
+ pr_err("Insufficient tail-space for reshape on %s\n",
dn);
goto release;
}
- if (data_offset != 1 &&
- data_offset < info2.data_offset + min) {
- fprintf(stderr, Name ": --data-offset too small on %s\n",
+ if (data_offset != INVALID_SECTORS &&
+ data_offset < sd->data_offset + min) {
+ pr_err("--data-offset too small on %s\n",
dn);
goto release;
}
- if (data_offset != 1)
- info2.new_data_offset = data_offset;
- else {
- unsigned long long off =
- info2.space_after / 2;
- off &= ~7ULL;
- if (off < min)
- off = min;
- info2.new_data_offset =
- info2.data_offset + off;
- }
- break;
- case -1: /* Decrease data offset */
- if (info2.space_before < min) {
- fprintf(stderr, Name ": insufficient head-room on %s\n",
+ if (data_offset != INVALID_SECTORS)
+ new_data_offset = data_offset;
+ else
+ new_data_offset = choose_offset(sd->data_offset,
+ sd->data_offset + after,
+ sd->data_offset + min,
+ sd->data_offset + after);
+ } else {
+ /* Decrease data offset */
+ if (before < min) {
+ if (can_fallback)
+ goto fallback;
+ pr_err("insufficient head-room on %s\n",
dn);
goto release;
}
- if (data_offset != 1 &&
- data_offset < info2.data_offset - min) {
- fprintf(stderr, Name ": --data-offset too small on %s\n",
+ if (data_offset != INVALID_SECTORS &&
+ data_offset < sd->data_offset - min) {
+ pr_err("--data-offset too small on %s\n",
dn);
goto release;
}
- if (data_offset != 1)
- info2.new_data_offset = data_offset;
- else {
- unsigned long long off =
- info2.space_before / 2;
- off &= ~7ULL;
- if (off < min)
- off = min;
- info2.new_data_offset =
- info2.data_offset - off;
- }
- break;
+ if (data_offset != INVALID_SECTORS)
+ new_data_offset = data_offset;
+ else
+ new_data_offset = choose_offset(sd->data_offset - before,
+ sd->data_offset,
+ sd->data_offset - before,
+ sd->data_offset - min);
}
}
- if (sysfs_set_num(sra, sd, "new_offset",
- info2.new_data_offset) < 0) {
- err = errno;
- fprintf(stderr, Name ": Cannot set new_offset for %s\n",
+ err = sysfs_set_num(sra, sd, "new_offset", new_data_offset);
+ if (err < 0 && errno == E2BIG) {
+ /* try again after increasing data size to max */
+ err = sysfs_set_num(sra, sd, "size", 0);
+ if (err < 0 && errno == EINVAL &&
+ !(sd->disk.state & (1<<MD_DISK_SYNC))) {
+ /* some kernels have a bug where you cannot
+ * use '0' on spare devices. */
+ sysfs_set_num(sra, sd, "size",
+ (sra->component_size + after)/2);
+ }
+ err = sysfs_set_num(sra, sd, "new_offset",
+ new_data_offset);
+ }
+ if (err < 0) {
+ if (errno == E2BIG && data_offset != INVALID_SECTORS) {
+ pr_err("data-offset is too big for %s\n",
+ dn);
+ goto release;
+ }
+ if (sd == sra->devs &&
+ (errno == ENOENT || errno == E2BIG))
+ /* Early kernel, no 'new_offset' file,
+ * or kernel doesn't like us.
+ * For RAID5/6 this is not fatal
+ */
+ return 1;
+ pr_err("Cannot set new_offset for %s\n",
dn);
break;
}
}
+ return err;
+release:
+ return -1;
+fallback:
+ /* Just use a backup file */
+ return 1;
+}
+
+static int raid10_reshape(char *container, int fd, char *devname,
+ struct supertype *st, struct mdinfo *info,
+ struct reshape *reshape,
+ unsigned long long data_offset,
+ int force, int verbose)
+{
+ /* Changing raid_disks, layout, chunksize or possibly
+ * just data_offset for a RAID10.
+ * We must always change data_offset. We change by at least
+ * ->min_offset_change which is the largest of the old and new
+ * chunk sizes.
+ * If raid_disks is increasing, then data_offset must decrease
+ * by at least this copy size.
+ * If raid_disks is unchanged, data_offset must increase or
+ * decrease by at least min_offset_change but preferably by much more.
+ * We choose half of the available space.
+ * If raid_disks is decreasing, data_offset must increase by
+ * at least min_offset_change. To allow of this, component_size
+ * must be decreased by the same amount.
+ *
+ * So we calculate the required minimum and direction, possibly
+ * reduce the component_size, then iterate through the devices
+ * and set the new_data_offset.
+ * If that all works, we set chunk_size, layout, raid_disks, and start
+ * 'reshape'
+ */
+ struct mdinfo *sra;
+ unsigned long long min;
+ int err = 0;
+
+ sra = sysfs_read(fd, NULL,
+ GET_COMPONENT|GET_DEVS|GET_OFFSET|GET_STATE|GET_CHUNK
+ );
+ if (!sra) {
+ pr_err("%s: Cannot get array details from sysfs\n",
+ devname);
+ goto release;
+ }
+ min = reshape->min_offset_change;
+
+ if (info->delta_disks)
+ sysfs_set_str(sra, NULL, "reshape_direction",
+ info->delta_disks < 0 ? "backwards" : "forwards");
+ if (info->delta_disks < 0 &&
+ info->space_after < min) {
+ int rv = sysfs_set_num(sra, NULL, "component_size",
+ (sra->component_size -
+ min)/2);
+ if (rv) {
+ pr_err("cannot reduce component size\n");
+ goto release;
+ }
+ }
+ err = set_new_data_offset(sra, st, devname, info->delta_disks, data_offset,
+ min, 0);
+ if (err == 1) {
+ pr_err("Cannot set new_data_offset: RAID10 reshape not\n");
+ cont_err("supported on this kernel\n");
+ err = -1;
+ }
+ if (err < 0)
+ goto release;
+
if (!err && sysfs_set_num(sra, NULL, "chunk_size", info->new_chunk) < 0)
err = errno;
if (!err && sysfs_set_num(sra, NULL, "layout", reshape->after.layout) < 0)
if (!err && sysfs_set_str(sra, NULL, "sync_action", "reshape") < 0)
err = errno;
if (err) {
- fprintf(stderr, Name ": Cannot set array shape for %s\n",
- devname);
- if (err == EBUSY &&
- (info->array.state & (1<<MD_SB_BITMAP_PRESENT)))
- fprintf(stderr,
- " Bitmap must be removed before"
- " shape can be changed\n");
- goto release;
+ pr_err("Cannot set array shape for %s\n",
+ devname);
+ if (err == EBUSY &&
+ (info->array.state & (1<<MD_SB_BITMAP_PRESENT)))
+ cont_err(" Bitmap must be removed before"
+ " shape can be changed\n");
+ goto release;
}
sysfs_free(sra);
return 0;
unsigned long long min_space_before = 0, min_space_after = 0;
int first = 1;
- sra = sysfs_read(fd, 0, GET_DEVS);
+ sra = sysfs_read(fd, NULL, GET_DEVS);
if (!sra)
return;
for (sd = sra->devs; sd; sd = sd->next) {
sysfs_free(sra);
}
+static void update_cache_size(char *container, struct mdinfo *sra,
+ struct mdinfo *info,
+ int disks, unsigned long long blocks)
+{
+ /* Check that the internal stripe cache is
+ * large enough, or it won't work.
+ * It must hold at least 4 stripes of the larger
+ * chunk size
+ */
+ unsigned long cache;
+ cache = max(info->array.chunk_size, info->new_chunk);
+ cache *= 4; /* 4 stripes minimum */
+ cache /= 512; /* convert to sectors */
+ /* make sure there is room for 'blocks' with a bit to spare */
+ if (cache < 16 + blocks / disks)
+ cache = 16 + blocks / disks;
+ cache /= (4096/512); /* Covert from sectors to pages */
+
+ if (sra->cache_size < cache)
+ subarray_set_num(container, sra, "stripe_cache_size",
+ cache+1);
+}
+
+static int impose_reshape(struct mdinfo *sra,
+ struct mdinfo *info,
+ struct supertype *st,
+ int fd,
+ int restart,
+ char *devname, char *container,
+ struct reshape *reshape)
+{
+ struct mdu_array_info_s array;
+
+ sra->new_chunk = info->new_chunk;
+
+ if (restart) {
+ /* for external metadata checkpoint saved by mdmon can be lost
+ * or missed /due to e.g. crash/. Check if md is not during
+ * restart farther than metadata points to.
+ * If so, this means metadata information is obsolete.
+ */
+ if (st->ss->external)
+ verify_reshape_position(info, reshape->level);
+ sra->reshape_progress = info->reshape_progress;
+ } else {
+ sra->reshape_progress = 0;
+ if (reshape->after.data_disks < reshape->before.data_disks)
+ /* start from the end of the new array */
+ sra->reshape_progress = (sra->component_size
+ * reshape->after.data_disks);
+ }
+
+ ioctl(fd, GET_ARRAY_INFO, &array);
+ if (info->array.chunk_size == info->new_chunk &&
+ reshape->before.layout == reshape->after.layout &&
+ st->ss->external == 0) {
+ /* use SET_ARRAY_INFO but only if reshape hasn't started */
+ array.raid_disks = reshape->after.data_disks + reshape->parity;
+ if (!restart &&
+ ioctl(fd, SET_ARRAY_INFO, &array) != 0) {
+ int err = errno;
+
+ pr_err("Cannot set device shape for %s: %s\n",
+ devname, strerror(errno));
+
+ if (err == EBUSY &&
+ (array.state & (1<<MD_SB_BITMAP_PRESENT)))
+ cont_err("Bitmap must be removed before"
+ " shape can be changed\n");
+
+ goto release;
+ }
+ } else if (!restart) {
+ /* set them all just in case some old 'new_*' value
+ * persists from some earlier problem.
+ */
+ int err = 0;
+ if (sysfs_set_num(sra, NULL, "chunk_size", info->new_chunk) < 0)
+ err = errno;
+ if (!err && sysfs_set_num(sra, NULL, "layout",
+ reshape->after.layout) < 0)
+ err = errno;
+ if (!err && subarray_set_num(container, sra, "raid_disks",
+ reshape->after.data_disks +
+ reshape->parity) < 0)
+ err = errno;
+ if (err) {
+ pr_err("Cannot set device shape for %s\n",
+ devname);
+
+ if (err == EBUSY &&
+ (array.state & (1<<MD_SB_BITMAP_PRESENT)))
+ cont_err("Bitmap must be removed before"
+ " shape can be changed\n");
+ goto release;
+ }
+ }
+ return 0;
+release:
+ return -1;
+}
+
+static int impose_level(int fd, int level, char *devname, int verbose)
+{
+ char *c;
+ struct mdu_array_info_s array;
+ struct mdinfo info;
+ sysfs_init(&info, fd, NULL);
+
+ ioctl(fd, GET_ARRAY_INFO, &array);
+ if (level == 0 &&
+ (array.level >= 4 && array.level <= 6)) {
+ /* To convert to RAID0 we need to fail and
+ * remove any non-data devices. */
+ int found = 0;
+ int d;
+ int data_disks = array.raid_disks - 1;
+ if (array.level == 6)
+ data_disks -= 1;
+ if (array.level == 5 &&
+ array.layout != ALGORITHM_PARITY_N)
+ return -1;
+ if (array.level == 6 &&
+ array.layout != ALGORITHM_PARITY_N_6)
+ return -1;
+ sysfs_set_str(&info, NULL,"sync_action", "idle");
+ /* First remove any spares so no recovery starts */
+ for (d = 0, found = 0;
+ d < MAX_DISKS && found < array.nr_disks;
+ d++) {
+ mdu_disk_info_t disk;
+ disk.number = d;
+ if (ioctl(fd, GET_DISK_INFO, &disk) < 0)
+ continue;
+ if (disk.major == 0 && disk.minor == 0)
+ continue;
+ found++;
+ if ((disk.state & (1 << MD_DISK_ACTIVE))
+ && disk.raid_disk < data_disks)
+ /* keep this */
+ continue;
+ ioctl(fd, HOT_REMOVE_DISK,
+ makedev(disk.major, disk.minor));
+ }
+ /* Now fail anything left */
+ ioctl(fd, GET_ARRAY_INFO, &array);
+ for (d = 0, found = 0;
+ d < MAX_DISKS && found < array.nr_disks;
+ d++) {
+ int cnt;
+ mdu_disk_info_t disk;
+ disk.number = d;
+ if (ioctl(fd, GET_DISK_INFO, &disk) < 0)
+ continue;
+ if (disk.major == 0 && disk.minor == 0)
+ continue;
+ found++;
+ if ((disk.state & (1 << MD_DISK_ACTIVE))
+ && disk.raid_disk < data_disks)
+ /* keep this */
+ continue;
+ ioctl(fd, SET_DISK_FAULTY,
+ makedev(disk.major, disk.minor));
+ cnt = 5;
+ while (ioctl(fd, HOT_REMOVE_DISK,
+ makedev(disk.major, disk.minor)) < 0
+ && errno == EBUSY
+ && cnt--) {
+ usleep(10000);
+ }
+ }
+ }
+ c = map_num(pers, level);
+ if (c) {
+ int err = sysfs_set_str(&info, NULL, "level", c);
+ if (err) {
+ err = errno;
+ pr_err("%s: could not set level to %s\n",
+ devname, c);
+ if (err == EBUSY &&
+ (array.state & (1<<MD_SB_BITMAP_PRESENT)))
+ cont_err("Bitmap must be removed"
+ " before level can be changed\n");
+ return err;
+ }
+ if (verbose >= 0)
+ pr_err("level of %s changed to %s\n",
+ devname, c);
+ }
+ return 0;
+}
+
+int sigterm = 0;
+static void catch_term(int sig)
+{
+ sigterm = 1;
+}
+
+static int continue_via_systemd(char *devnm)
+{
+ int skipped, i, pid, status;
+ char pathbuf[1024];
+ /* In a systemd/udev world, it is best to get systemd to
+ * run "mdadm --grow --continue" rather than running in the
+ * background.
+ */
+ switch(fork()) {
+ case 0:
+ /* FIXME yuk. CLOSE_EXEC?? */
+ skipped = 0;
+ for (i = 3; skipped < 20; i++)
+ if (close(i) < 0)
+ skipped++;
+ else
+ skipped = 0;
+
+ /* Don't want to see error messages from
+ * systemctl. If the service doesn't exist,
+ * we fork ourselves.
+ */
+ close(2);
+ open("/dev/null", O_WRONLY);
+ snprintf(pathbuf, sizeof(pathbuf), "mdadm-grow-continue@%s.service",
+ devnm);
+ status = execl("/usr/bin/systemctl", "systemctl",
+ "start",
+ pathbuf, NULL);
+ status = execl("/bin/systemctl", "systemctl", "start",
+ pathbuf, NULL);
+ exit(1);
+ case -1: /* Just do it ourselves. */
+ break;
+ default: /* parent - good */
+ pid = wait(&status);
+ if (pid >= 0 && status == 0)
+ return 1;
+ }
+ return 0;
+}
+
static int reshape_array(char *container, int fd, char *devname,
struct supertype *st, struct mdinfo *info,
int force, struct mddev_dev *devlist,
int spares_needed;
char *msg;
int orig_level = UnSet;
- int disks, odisks;
+ int odisks;
int delayed;
struct mdu_array_info_s array;
int nrdisks;
int err;
unsigned long blocks;
- unsigned long cache;
unsigned long long array_size;
int done;
struct mdinfo *sra = NULL;
+ char buf[20];
/* when reshaping a RAID0, the component_size might be zero.
* So try to fix that up.
info->new_level = UnSet;
if (info->delta_disks > 0)
info->array.raid_disks -= info->delta_disks;
- msg = analyse_change(info, &reshape);
+ msg = analyse_change(devname, info, &reshape);
info->new_level = new_level;
if (info->delta_disks > 0)
info->array.raid_disks += info->delta_disks;
/* Make sure the array isn't read-only */
ioctl(fd, RESTART_ARRAY_RW, 0);
} else
- msg = analyse_change(info, &reshape);
+ msg = analyse_change(devname, info, &reshape);
if (msg) {
- pr_err("%s\n", msg);
+ /* if msg == "", error has already been printed */
+ if (msg[0])
+ pr_err("%s\n", msg);
goto release;
}
if (restart &&
goto release;
}
- if (st->ss->external && restart && (info->reshape_progress == 0)) {
+ if (st->ss->external && restart && (info->reshape_progress == 0) &&
+ !((sysfs_get_str(info, NULL, "sync_action", buf, sizeof(buf)) > 0) &&
+ (strncmp(buf, "reshape", 7) == 0))) {
/* When reshape is restarted from '0', very begin of array
* it is possible that for external metadata reshape and array
* configuration doesn't happen.
/* reshape already started. just skip to monitoring the reshape */
if (reshape.backup_blocks == 0)
return 0;
+ if (restart & RESHAPE_NO_BACKUP)
+ return 0;
+
+ /* Need 'sra' down at 'started:' */
+ sra = sysfs_read(fd, NULL,
+ GET_COMPONENT|GET_DEVS|GET_OFFSET|GET_STATE|GET_CHUNK|
+ GET_CACHE);
+ if (!sra) {
+ pr_err("%s: Cannot get array details from sysfs\n",
+ devname);
+ goto release;
+ }
+
+ if (!backup_file)
+ backup_file = locate_backup(sra->sys_name);
+
goto started;
}
/* The container is frozen but the array may not be.
}
if (reshape.level != array.level) {
- char *c = map_num(pers, reshape.level);
- int err;
- if (c == NULL)
- goto release;
-
- err = sysfs_set_str(info, NULL, "level", c);
- if (err) {
- err = errno;
- pr_err("%s: could not set level to %s\n",
- devname, c);
- if (err == EBUSY &&
- (info->array.state & (1<<MD_SB_BITMAP_PRESENT)))
- cont_err("Bitmap must be removed"
- " before level can be changed\n");
+ int err = impose_level(fd, reshape.level, devname, verbose);
+ if (err)
goto release;
- }
- if (verbose >= 0)
- pr_err("level of %s changed to %s\n",
- devname, c);
+ info->new_layout = UnSet; /* after level change,
+ * layout is meaningless */
orig_level = array.level;
sysfs_freeze_array(info);
if (reshape.level > 0 && st->ss->external) {
/* make sure mdmon is aware of the new level */
- if (mdmon_running(st->container_dev))
+ if (mdmon_running(container))
flush_mdmon(container);
- if (!mdmon_running(st->container_dev))
- start_mdmon(st->container_dev);
+ if (!mdmon_running(container))
+ start_mdmon(container);
ping_monitor(container);
- if (mdmon_running(st->container_dev) &&
+ if (mdmon_running(container) &&
st->update_tail == NULL)
st->update_tail = &st->updates;
}
struct mdinfo *d;
if (info2) {
- sysfs_init(info2, fd, st->devnum);
+ sysfs_init(info2, fd, st->devnm);
/* When increasing number of devices, we need to set
* new raid_disks before adding these, or they might
* be rejected.
Manage_subdevs(devname, fd, devlist, verbose,
0,NULL, 0);
+ if (reshape.backup_blocks == 0 && data_offset != INVALID_SECTORS)
+ reshape.backup_blocks = reshape.before.data_disks * info->array.chunk_size/512;
if (reshape.backup_blocks == 0) {
/* No restriping needed, but we might need to impose
* some more changes: layout, raid_disks, chunk_size
goto release;
}
-started:
-
if (array.level == 10) {
- /* Reshaping RAID10 does not require and data backup by
+ /* Reshaping RAID10 does not require any data backup by
* user-space. Instead it requires that the data_offset
* is changed to avoid the need for backup.
* So this is handled very separately
&reshape, data_offset,
force, verbose);
}
- sra = sysfs_read(fd, 0,
+ sra = sysfs_read(fd, NULL,
GET_COMPONENT|GET_DEVS|GET_OFFSET|GET_STATE|GET_CHUNK|
GET_CACHE);
if (!sra) {
goto release;
}
+ if (!backup_file)
+ switch(set_new_data_offset(sra, st, devname,
+ reshape.after.data_disks - reshape.before.data_disks,
+ data_offset,
+ reshape.min_offset_change, 1)) {
+ case -1:
+ goto release;
+ case 0:
+ /* Updated data_offset, so it's easy now */
+ update_cache_size(container, sra, info,
+ min(reshape.before.data_disks,
+ reshape.after.data_disks),
+ reshape.backup_blocks);
+
+ /* Right, everything seems fine. Let's kick things off.
+ */
+ sync_metadata(st);
+
+ if (impose_reshape(sra, info, st, fd, restart,
+ devname, container, &reshape) < 0)
+ goto release;
+ if (sysfs_set_str(sra, NULL, "sync_action", "reshape") < 0) {
+ pr_err("Failed to initiate reshape!\n");
+ goto release;
+ }
+ if (info->new_level == reshape.level)
+ return 0;
+ /* need to adjust level when reshape completes */
+ switch(fork()) {
+ case -1: /* ignore error, but don't wait */
+ return 0;
+ default: /* parent */
+ return 0;
+ case 0:
+ map_fork();
+ break;
+ }
+ close(fd);
+ wait_reshape(sra);
+ fd = open_dev(sra->sys_name);
+ if (fd >= 0)
+ impose_level(fd, info->new_level, devname, verbose);
+ return 0;
+ case 1: /* Couldn't set data_offset, try the old way */
+ if (data_offset != INVALID_SECTORS) {
+ pr_err("Cannot update data_offset on this array\n");
+ goto release;
+ }
+ break;
+ }
+
+started:
/* Decide how many blocks (sectors) for a reshape
* unit. The number we have so far is just a minimum
*/
if (backup_file == NULL) {
if (reshape.after.data_disks <=
reshape.before.data_disks) {
- pr_err("%s: Cannot grow - "
- "need backup-file\n", devname);
+ pr_err("%s: Cannot grow - need backup-file\n",
+ devname);
+ pr_err(" Please provide one with \"--backup=...\"\n");
goto release;
} else if (sra->array.spare_disks == 0) {
pr_err("%s: Cannot grow - "
if (!reshape_open_backup_file(backup_file, fd, devname,
(signed)blocks,
fdlist+d, offsets+d,
+ sra->sys_name,
restart)) {
goto release;
}
}
}
- /* lastly, check that the internal stripe cache is
- * large enough, or it won't work.
- * It must hold at least 4 stripes of the larger
- * chunk size
- */
- cache = max(info->array.chunk_size, info->new_chunk);
- cache *= 4; /* 4 stripes minimum */
- cache /= 512; /* convert to sectors */
- disks = min(reshape.before.data_disks, reshape.after.data_disks);
- /* make sure there is room for 'blocks' with a bit to spare */
- if (cache < 16 + blocks / disks)
- cache = 16 + blocks / disks;
- cache /= (4096/512); /* Covert from sectors to pages */
-
- if (sra->cache_size < cache)
- subarray_set_num(container, sra, "stripe_cache_size",
- cache+1);
+ update_cache_size(container, sra, info,
+ min(reshape.before.data_disks, reshape.after.data_disks),
+ blocks);
/* Right, everything seems fine. Let's kick things off.
* If only changing raid_disks, use ioctl, else use
*/
sync_metadata(st);
- sra->new_chunk = info->new_chunk;
-
- if (restart) {
- /* for external metadata checkpoint saved by mdmon can be lost
- * or missed /due to e.g. crash/. Check if md is not during
- * restart farther than metadata points to.
- * If so, this means metadata information is obsolete.
- */
- if (st->ss->external)
- verify_reshape_position(info, reshape.level);
- sra->reshape_progress = info->reshape_progress;
- } else {
- sra->reshape_progress = 0;
- if (reshape.after.data_disks < reshape.before.data_disks)
- /* start from the end of the new array */
- sra->reshape_progress = (sra->component_size
- * reshape.after.data_disks);
- }
-
- if (info->array.chunk_size == info->new_chunk &&
- reshape.before.layout == reshape.after.layout &&
- st->ss->external == 0) {
- /* use SET_ARRAY_INFO but only if reshape hasn't started */
- ioctl(fd, GET_ARRAY_INFO, &array);
- array.raid_disks = reshape.after.data_disks + reshape.parity;
- if (!restart &&
- ioctl(fd, SET_ARRAY_INFO, &array) != 0) {
- int err = errno;
-
- pr_err("Cannot set device shape for %s: %s\n",
- devname, strerror(errno));
-
- if (err == EBUSY &&
- (array.state & (1<<MD_SB_BITMAP_PRESENT)))
- cont_err("Bitmap must be removed before"
- " shape can be changed\n");
-
- goto release;
- }
- } else if (!restart) {
- /* set them all just in case some old 'new_*' value
- * persists from some earlier problem.
- */
- int err = 0;
- if (sysfs_set_num(sra, NULL, "chunk_size", info->new_chunk) < 0)
- err = errno;
- if (!err && sysfs_set_num(sra, NULL, "layout",
- reshape.after.layout) < 0)
- err = errno;
- if (!err && subarray_set_num(container, sra, "raid_disks",
- reshape.after.data_disks +
- reshape.parity) < 0)
- err = errno;
- if (err) {
- pr_err("Cannot set device shape for %s\n",
- devname);
-
- if (err == EBUSY &&
- (array.state & (1<<MD_SB_BITMAP_PRESENT)))
- cont_err("Bitmap must be removed before"
- " shape can be changed\n");
- goto release;
- }
- }
+ if (impose_reshape(sra, info, st, fd, restart,
+ devname, container, &reshape) < 0)
+ goto release;
err = start_reshape(sra, restart, reshape.before.data_disks,
reshape.after.data_disks);
return 1;
}
+ if (!forked && !check_env("MDADM_NO_SYSTEMCTL"))
+ if (continue_via_systemd(container ?: sra->sys_name)) {
+ free(fdlist);
+ free(offsets);
+ sysfs_free(sra);
+ return 0;
+ }
+
/* Now we just need to kick off the reshape and watch, while
* handling backups of the data...
* This is all done by a forked background process.
do {
struct mdstat_ent *mds, *m;
delayed = 0;
- mds = mdstat_read(0, 0);
- for (m = mds; m; m = mds->next)
- if (m->devnum == devname2devnum(sra->sys_name)) {
+ mds = mdstat_read(1, 0);
+ for (m = mds; m; m = m->next)
+ if (strcmp(m->devnm, sra->sys_name) == 0) {
if (m->resync &&
m->percent == RESYNC_DELAYED)
delayed = 1;
delayed = 0;
}
if (delayed)
- sleep(30 - (delayed-1) * 25);
+ mdstat_wait(30 - (delayed-1) * 25);
} while (delayed);
-
+ mdstat_close();
close(fd);
if (check_env("MDADM_GROW_VERIFY"))
fd = open(devname, O_RDONLY | O_DIRECT);
fd = -1;
mlockall(MCL_FUTURE);
+ signal(SIGTERM, catch_term);
+
if (st->ss->external) {
/* metadata handler takes it from here */
done = st->ss->manage_reshape(
free(fdlist);
free(offsets);
- if (backup_file && done)
+ if (backup_file && done) {
+ char *bul;
+ bul = make_backup(sra->sys_name);
+ if (bul) {
+ char buf[1024];
+ int l = readlink(bul, buf, sizeof(buf));
+ if (l > 0) {
+ buf[l]=0;
+ unlink(buf);
+ }
+ unlink(bul);
+ free(bul);
+ }
unlink(backup_file);
+ }
if (!done) {
abort_reshape(sra);
goto out;
if (st->ss->external) {
/* Re-load the metadata as much could have changed */
- int cfd = open_dev(st->container_dev);
+ int cfd = open_dev(st->container_devnm);
if (cfd >= 0) {
flush_mdmon(container);
st->ss->free_super(st);
set_array_size(st, info, info->text_version);
if (info->new_level != reshape.level) {
-
- c = map_num(pers, info->new_level);
- if (c) {
- err = sysfs_set_str(sra, NULL, "level", c);
- if (err)
- pr_err("%s: could not set level "
- "to %s\n", devname, c);
- }
+ if (fd < 0)
+ fd = open(devname, O_RDONLY);
+ impose_level(fd, info->new_level, devname, verbose);
+ close(fd);
if (info->new_level == 0)
st->update_tail = NULL;
}
struct supertype *st,
struct mdinfo *info,
int force,
- char *backup_file,
- int verbose, int restart, int freeze_reshape)
+ char *backup_file, int verbose,
+ int forked, int restart, int freeze_reshape)
{
struct mdinfo *cc = NULL;
int rv = restart;
- int last_devnum = -1;
+ char last_devnm[32] = "";
/* component_size is not meaningful for a container,
* so pass '0' meaning 'no change'
*/
ping_monitor(container);
- switch (fork()) {
+ if (!forked && !freeze_reshape && !check_env("MDADM_NO_SYSTEMCTL"))
+ if (continue_via_systemd(container))
+ return 0;
+
+ switch (forked ? 0 : fork()) {
case -1: /* error */
perror("Cannot fork to complete reshape\n");
unfreeze(st);
return 1;
default: /* parent */
if (!freeze_reshape)
- printf(Name ": multi-array reshape continues"
- " in background\n");
+ printf("%s: multi-array reshape continues"
+ " in background\n", Name);
return 0;
case 0: /* child */
map_fork();
int fd;
struct mdstat_ent *mdstat;
char *adev;
+ int devid;
sysfs_free(cc);
continue;
subarray = strchr(content->text_version+1, '/')+1;
- mdstat = mdstat_by_subdev(subarray,
- devname2devnum(container));
+ mdstat = mdstat_by_subdev(subarray, container);
if (!mdstat)
continue;
if (mdstat->active == 0) {
- pr_err("Skipping inactive "
- "array md%i.\n", mdstat->devnum);
+ pr_err("Skipping inactive array %s.\n",
+ mdstat->devnm);
free_mdstat(mdstat);
mdstat = NULL;
continue;
if (!content)
break;
- adev = map_dev(dev2major(mdstat->devnum),
- dev2minor(mdstat->devnum),
- 0);
+ devid = devnm2devid(mdstat->devnm);
+ adev = map_dev(major(devid), minor(devid), 0);
if (!adev)
adev = content->text_version;
- fd = open_dev(mdstat->devnum);
+ fd = open_dev(mdstat->devnm);
if (fd < 0) {
- printf(Name ": Device %s cannot be opened for reshape.",
- adev);
+ pr_err("Device %s cannot be opened for reshape.\n", adev);
break;
}
- if (last_devnum == mdstat->devnum) {
+ if (strcmp(last_devnm, mdstat->devnm) == 0) {
/* Do not allow for multiple reshape_array() calls for
* the same array.
* It can happen when reshape_array() returns without
* This is possibly interim until the behaviour of
* reshape_array is resolved().
*/
- printf(Name ": Multiple reshape execution detected for "
- "device %s.", adev);
+ printf("%s: Multiple reshape execution detected for "
+ "device %s.\n", Name, adev);
close(fd);
break;
}
- last_devnum = mdstat->devnum;
+ strcpy(last_devnm, mdstat->devnm);
- sysfs_init(content, fd, mdstat->devnum);
+ sysfs_init(content, fd, mdstat->devnm);
- if (mdmon_running(devname2devnum(container)))
+ if (mdmon_running(container))
flush_mdmon(container);
rv = reshape_array(container, fd, adev, st,
- content, force, NULL, 0ULL,
+ content, force, NULL, INVALID_SECTORS,
backup_file, verbose, 1, restart,
freeze_reshape);
close(fd);
if (rv)
break;
- if (mdmon_running(devname2devnum(container)))
+ if (mdmon_running(container))
flush_mdmon(container);
}
if (!rv)
unsigned long long backup_point,
unsigned long long wait_point,
unsigned long long *suspend_point,
- unsigned long long *reshape_completed)
+ unsigned long long *reshape_completed, int *frozen)
{
/* This function is called repeatedly by the reshape manager.
* It determines how much progress can safely be made and allows
wait_point = info->component_size - wait_point;
}
- sysfs_set_num(info, NULL, "sync_max", max_progress);
+ if (!*frozen)
+ sysfs_set_num(info, NULL, "sync_max", max_progress);
/* Now wait. If we have already reached the point that we were
* asked to wait to, don't wait at all, else wait for any change.
* waiting forever on a dead array
*/
char action[20];
- fd_set rfds;
if (sysfs_get_str(info, NULL, "sync_action",
action, 20) <= 0 ||
strncmp(action, "reshape", 7) != 0)
&& info->reshape_progress < (info->component_size
* reshape->after.data_disks))
break;
- FD_ZERO(&rfds);
- FD_SET(fd, &rfds);
- select(fd+1, NULL, NULL, &rfds, NULL);
+ sysfs_wait(fd, NULL);
if (sysfs_fd_get_ll(fd, &completed) < 0)
goto check_progress;
}
/* The abort might only be temporary. Wait up to 10
* seconds for fd to contain a valid number again.
*/
- struct timeval tv;
+ int wait = 10000;
int rv = -2;
- tv.tv_sec = 10;
- tv.tv_usec = 0;
- while (fd >= 0 && rv < 0 && tv.tv_sec > 0) {
- fd_set rfds;
- FD_ZERO(&rfds);
- FD_SET(fd, &rfds);
- if (select(fd+1, NULL, NULL, &rfds, &tv) != 1)
+ unsigned long long new_sync_max;
+ while (fd >= 0 && rv < 0 && wait > 0) {
+ if (sysfs_wait(fd, &wait) != 1)
break;
switch (sysfs_fd_get_ll(fd, &completed)) {
case 0:
/* all good again */
rv = 1;
+ /* If "sync_max" is no longer max_progress
+ * we need to freeze things
+ */
+ sysfs_get_ll(info, NULL, "sync_max", &new_sync_max);
+ *frozen = (new_sync_max != max_progress);
break;
case -2: /* read error - abort */
- tv.tv_sec = 0;
+ wait = 0;
break;
}
}
struct mdinfo *sd;
unsigned long stripes;
int uuid[4];
+ int frozen = 0;
/* set up the backup-super-block. This requires the
* uuid from the array.
wait_point = __le64_to_cpu(bsb.arraystart2);
}
+ reshape_completed = sra->reshape_progress;
rv = progress_reshape(sra, reshape,
backup_point, wait_point,
- &suspend_point, &reshape_completed);
+ &suspend_point, &reshape_completed,
+ &frozen);
/* external metadata would need to ping_monitor here */
sra->reshape_progress = reshape_completed;
forget_backup(dests, destfd,
destoffsets, 1);
}
-
+ if (sigterm)
+ rv = -2;
if (rv < 0) {
if (rv == -1)
done = 1;
}
if (rv == 0 && increasing && !st->ss->external) {
/* No longer need to monitor this reshape */
+ sysfs_set_str(sra, NULL, "sync_max", "max");
done = 1;
break;
}
}
/* FIXME maybe call progress_reshape one more time instead */
- abort_reshape(sra); /* remove any remaining suspension */
+ /* remove any remaining suspension */
+ sysfs_set_num(sra, NULL, "suspend_lo", 0x7FFFFFFFFFFFFFFFULL);
+ sysfs_set_num(sra, NULL, "suspend_hi", 0);
+ sysfs_set_num(sra, NULL, "suspend_lo", 0);
+ sysfs_set_num(sra, NULL, "sync_min", 0);
+
if (reshape->before.data_disks == reshape->after.data_disks)
sysfs_set_num(sra, NULL, "sync_speed_min", speed);
free(buf);
st->ss->free_super(st);
offsets[j] = dinfo.data_offset * 512;
}
- printf(Name ": restoring critical section\n");
+ printf("%s: restoring critical section\n", Name);
if (restore_stripes(fdlist, offsets,
info->array.raid_disks,
char *subarray = NULL;
struct mdinfo *cc = NULL;
struct mdstat_ent *mdstat = NULL;
- char buf[40];
int cfd = -1;
int fd2 = -1;
dprintf("Grow continue is run for ");
if (st->ss->external == 0) {
int d;
- dprintf("native array (%s)\n", devname);
+ dprintf_cont("native array (%s)\n", devname);
if (ioctl(fd, GET_ARRAY_INFO, &array.array) < 0) {
pr_err("%s is not an active md array -"
" aborting\n", devname);
continue;
err = st->ss->load_super(st, fd2, NULL);
close(fd2);
+ /* invalidate fd2 to avoid possible double close() */
+ fd2 = -1;
if (err)
continue;
break;
}
st->ss->getinfo_super(st, content, NULL);
} else {
- int container_dev;
+ char *container;
if (subarray) {
- dprintf("subarray (%s)\n", subarray);
- container_dev = st->container_dev;
- cfd = open_dev_excl(st->container_dev);
+ dprintf_cont("subarray (%s)\n", subarray);
+ container = st->container_devnm;
+ cfd = open_dev_excl(st->container_devnm);
} else {
- container_dev = st->devnum;
+ container = st->devnm;
close(fd);
- cfd = open_dev_excl(st->devnum);
- dprintf("container (%i)\n", container_dev);
+ cfd = open_dev_excl(st->devnm);
+ dprintf_cont("container (%s)\n", container);
fd = cfd;
}
if (cfd < 0) {
ret_val = 1;
goto Grow_continue_command_exit;
}
- fmt_devname(buf, container_dev);
/* find in container array under reshape
*/
pr_err("cannot continue reshape of an array"
" in container with unsupported"
" metadata: %s(%s)\n",
- devname, buf);
+ devname, container);
ret_val = 1;
goto Grow_continue_command_exit;
}
array = strchr(content->text_version+1, '/')+1;
- mdstat = mdstat_by_subdev(array, container_dev);
+ mdstat = mdstat_by_subdev(array, container);
if (!mdstat)
continue;
if (mdstat->active == 0) {
- pr_err("Skipping inactive "
- "array md%i.\n", mdstat->devnum);
+ pr_err("Skipping inactive array %s.\n",
+ mdstat->devnm);
free_mdstat(mdstat);
mdstat = NULL;
continue;
ret_val = 1;
goto Grow_continue_command_exit;
}
- fd2 = open_dev(mdstat->devnum);
+ fd2 = open_dev(mdstat->devnm);
if (fd2 < 0) {
- pr_err("cannot open (md%i)\n",
- mdstat->devnum);
+ pr_err("cannot open (%s)\n", mdstat->devnm);
ret_val = 1;
goto Grow_continue_command_exit;
}
- sysfs_init(content, fd2, mdstat->devnum);
+ sysfs_init(content, fd2, mdstat->devnm);
/* start mdmon in case it is not running
*/
- if (!mdmon_running(container_dev))
- start_mdmon(container_dev);
- ping_monitor(buf);
+ if (!mdmon_running(container))
+ start_mdmon(container);
+ ping_monitor(container);
- if (mdmon_running(container_dev))
+ if (mdmon_running(container))
st->update_tail = &st->updates;
else {
pr_err("No mdmon found. "
/* continue reshape
*/
- ret_val = Grow_continue(fd, st, content, backup_file, 0);
+ ret_val = Grow_continue(fd, st, content, backup_file, 1, 0);
Grow_continue_command_exit:
if (fd2 > -1)
}
int Grow_continue(int mdfd, struct supertype *st, struct mdinfo *info,
- char *backup_file, int freeze_reshape)
+ char *backup_file, int forked, int freeze_reshape)
{
int ret_val = 2;
return ret_val;
if (st->ss->external) {
- char container[40];
- int cfd = open_dev(st->container_dev);
+ int cfd = open_dev(st->container_devnm);
if (cfd < 0)
return 1;
- fmt_devname(container, st->container_dev);
- st->ss->load_container(st, cfd, container);
+ st->ss->load_container(st, cfd, st->container_devnm);
close(cfd);
- ret_val = reshape_container(container, NULL, mdfd,
+ ret_val = reshape_container(st->container_devnm, NULL, mdfd,
st, info, 0, backup_file,
- 0, 1, freeze_reshape);
+ 0, forked,
+ 1 | info->reshape_active,
+ freeze_reshape);
} else
ret_val = reshape_array(NULL, mdfd, "array", st, info, 1,
- NULL, 0ULL, backup_file, 0, 0, 1,
+ NULL, INVALID_SECTORS,
+ backup_file, 0, forked,
+ 1 | info->reshape_active,
freeze_reshape);
return ret_val;
}
+
+char *make_backup(char *name)
+{
+ char *base = "backup_file-";
+ int len;
+ char *fname;
+
+ len = strlen(MAP_DIR) + 1 + strlen(base) + strlen(name)+1;
+ fname = xmalloc(len);
+ sprintf(fname, "%s/%s%s", MAP_DIR, base, name);
+ return fname;
+}
+
+char *locate_backup(char *name)
+{
+ char *fl = make_backup(name);
+ struct stat stb;
+
+ if (stat(fl, &stb) == 0 &&
+ S_ISREG(stb.st_mode))
+ return fl;
+
+ free(fl);
+ return NULL;
+}
projects / thirdparty / mdadm.git / blobdiff