/*
* 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
}
free(fdlist);
if (err) {
- pr_err("Failed to restore critical"
- " section for reshape - sorry.\n");
+ pr_err("Failed to restore critical section for reshape - sorry.\n");
if (!backup_file)
- pr_err("Possibly you need"
- " to specify a --backup-file\n");
+ pr_err("Possibly you need to specify a --backup-file\n");
return 1;
}
if (vers < 9003) {
major = BITMAP_MAJOR_HOSTENDIAN;
- pr_err("Warning - bitmaps created on this kernel"
- " are not portable\n"
- " between different architectures. Consider upgrading"
- " the Linux kernel.\n");
+ pr_err("Warning - bitmaps created on this kernel are not portable\n"
+ " between different architectures. Consider upgrading the Linux kernel.\n");
}
+ /*
+ * We only ever get called if s->bitmap_file is != NULL, so this check
+ * is just here to quiet down static code checkers.
+ */
+ if (!s->bitmap_file)
+ return 1;
+
+ if (strcmp(s->bitmap_file, "clustered") == 0)
+ major = BITMAP_MAJOR_CLUSTERED;
+
if (ioctl(fd, GET_BITMAP_FILE, &bmf) != 0) {
if (errno == ENOMEM)
pr_err("Memory allocation failure.\n");
return 1;
}
if (bmf.pathname[0]) {
- if (strcmp(s->bitmap_file,"none")==0) {
- if (ioctl(fd, SET_BITMAP_FILE, -1)!= 0) {
+ if (strcmp(s->bitmap_file,"none") == 0) {
+ if (ioctl(fd, SET_BITMAP_FILE, -1) != 0) {
pr_err("failed to remove bitmap %s\n",
bmf.pathname);
return 1;
pr_err("cannot get array status for %s\n", devname);
return 1;
}
- if (array.state & (1<<MD_SB_BITMAP_PRESENT)) {
+ if (array.state & (1 << MD_SB_BITMAP_PRESENT)) {
if (strcmp(s->bitmap_file, "none")==0) {
- array.state &= ~(1<<MD_SB_BITMAP_PRESENT);
- if (ioctl(fd, SET_ARRAY_INFO, &array)!= 0) {
- pr_err("failed to remove internal bitmap.\n");
+ array.state &= ~(1 << MD_SB_BITMAP_PRESENT);
+ if (ioctl(fd, SET_ARRAY_INFO, &array) != 0) {
+ if (array.state & (1 << MD_SB_CLUSTERED))
+ pr_err("failed to remove clustered bitmap.\n");
+ else
+ pr_err("failed to remove internal bitmap.\n");
return 1;
}
return 0;
}
- pr_err("Internal bitmap already present on %s\n",
- devname);
+ pr_err("bitmap already present on %s\n", devname);
return 1;
}
bitmapsize = array.size;
bitmapsize <<= 1;
if (get_dev_size(fd, NULL, &array_size) &&
- array_size > (0x7fffffffULL<<9)) {
+ array_size > (0x7fffffffULL << 9)) {
/* Array is big enough that we cannot trust array.size
* try other approaches
*/
}
if (array.level == 10) {
- int ncopies = (array.layout&255)*((array.layout>>8)&255);
+ int ncopies;
+
+ ncopies = (array.layout & 255) * ((array.layout >> 8) & 255);
bitmapsize = bitmapsize * array.raid_disks / ncopies;
}
free(st);
return 1;
}
- if (strcmp(s->bitmap_file, "internal") == 0) {
+ if (strcmp(s->bitmap_file, "internal") == 0 ||
+ strcmp(s->bitmap_file, "clustered") == 0) {
int rv;
int d;
int offset_setable = 0;
struct mdinfo *mdi;
if (st->ss->add_internal_bitmap == NULL) {
- pr_err("Internal bitmaps not supported "
- "with %s metadata\n", st->ss->name);
+ pr_err("Internal bitmaps not supported with %s metadata\n", st->ss->name);
return 1;
}
+ st->nodes = c->nodes;
+ st->cluster_name = c->homecluster;
mdi = sysfs_read(fd, NULL, GET_BITMAP_LOCATION);
if (mdi)
offset_setable = 1;
- for (d=0; d< st->max_devs; d++) {
+ for (d = 0; d < st->max_devs; d++) {
mdu_disk_info_t disk;
char *dv;
+ int fd2;
+
disk.number = d;
if (ioctl(fd, GET_DISK_INFO, &disk) < 0)
continue;
- if (disk.major == 0 &&
- disk.minor == 0)
+ if (disk.major == 0 && disk.minor == 0)
continue;
- if ((disk.state & (1<<MD_DISK_SYNC))==0)
+ if ((disk.state & (1 << MD_DISK_SYNC)) == 0)
continue;
dv = map_dev(disk.major, disk.minor, 1);
- if (dv) {
- int fd2 = dev_open(dv, O_RDWR);
- if (fd2 < 0)
- continue;
- if (st->ss->load_super(st, fd2, NULL)==0) {
- if (st->ss->add_internal_bitmap(
- st,
- &s->bitmap_chunk, c->delay, s->write_behind,
- bitmapsize, offset_setable,
- major)
- )
- st->ss->write_bitmap(st, fd2);
- else {
- pr_err("failed to create internal bitmap"
- " - chunksize problem.\n");
- close(fd2);
- return 1;
- }
+ if (!dv)
+ continue;
+ fd2 = dev_open(dv, O_RDWR);
+ if (fd2 < 0)
+ continue;
+ rv = st->ss->load_super(st, fd2, NULL);
+ if (!rv) {
+ rv = st->ss->add_internal_bitmap(
+ st, &s->bitmap_chunk, c->delay,
+ s->write_behind, bitmapsize,
+ offset_setable, major);
+ if (!rv) {
+ st->ss->write_bitmap(st, fd2,
+ NodeNumUpdate);
+ } else {
+ pr_err("failed to create internal bitmap - chunksize problem.\n");
}
- close(fd2);
+ } else {
+ pr_err("failed to load super-block.\n");
}
+ close(fd2);
+ if (rv)
+ return 1;
}
if (offset_setable) {
st->ss->getinfo_super(st, mdi, NULL);
rv = sysfs_set_num_signed(mdi, NULL, "bitmap/location",
mdi->bitmap_offset);
} else {
- array.state |= (1<<MD_SB_BITMAP_PRESENT);
+ if (strcmp(s->bitmap_file, "clustered") == 0)
+ array.state |= (1 << MD_SB_CLUSTERED);
+ array.state |= (1 << MD_SB_BITMAP_PRESENT);
rv = ioctl(fd, SET_ARRAY_INFO, &array);
}
if (rv < 0) {
if (errno == EBUSY)
- pr_err("Cannot add bitmap while array is"
- " resyncing or reshaping etc.\n");
+ pr_err("Cannot add bitmap while array is resyncing or reshaping etc.\n");
pr_err("failed to set internal bitmap.\n");
return 1;
}
disk.number = d;
if (ioctl(fd, GET_DISK_INFO, &disk) < 0)
continue;
- if ((disk.major==0 && disk.minor==0) ||
- (disk.state & (1<<MD_DISK_REMOVED)))
+ if ((disk.major==0 && disk.minor == 0) ||
+ (disk.state & (1 << MD_DISK_REMOVED)))
continue;
dv = map_dev(disk.major, disk.minor, 1);
if (!dv)
pr_err("cannot find UUID for array!\n");
return 1;
}
- if (CreateBitmap(s->bitmap_file, c->force, (char*)uuid, s->bitmap_chunk,
- c->delay, s->write_behind, bitmapsize, major)) {
+ if (CreateBitmap(s->bitmap_file, c->force, (char*)uuid,
+ s->bitmap_chunk, c->delay, s->write_behind,
+ bitmapsize, major)) {
return 1;
}
bitmap_fd = open(s->bitmap_file, O_RDWR);
if (bitmap_fd < 0) {
- pr_err("weird: %s cannot be opened\n",
- s->bitmap_file);
+ pr_err("weird: %s cannot be opened\n", s->bitmap_file);
return 1;
}
if (ioctl(fd, SET_BITMAP_FILE, bitmap_fd) < 0) {
int err = errno;
if (errno == EBUSY)
- pr_err("Cannot add bitmap while array is"
- " resyncing or reshaping etc.\n");
+ pr_err("Cannot add bitmap while array is resyncing or reshaping etc.\n");
pr_err("Cannot set bitmap file for %s: %s\n",
devname, strerror(err));
return 1;
return unfreeze_container(st);
else {
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)
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);
}
if (!already_running)
sysfs_set_num(sra, NULL, "sync_min", sync_max_to_set);
err = err ?: sysfs_set_num(sra, NULL, "sync_max", sync_max_to_set);
- if (!already_running)
- err = err ?: sysfs_set_str(sra, NULL, "sync_action", "reshape");
-
+ if (!already_running && err == 0) {
+ int cnt = 5;
+ do {
+ err = sysfs_set_str(sra, NULL, "sync_action", "reshape");
+ if (err)
+ sleep(1);
+ } while (err && errno == EBUSY && cnt-- > 0);
+ }
return err;
}
void abort_reshape(struct mdinfo *sra)
{
sysfs_set_str(sra, NULL, "sync_action", "idle");
+ /*
+ * Prior to kernel commit: 23ddff3792f6 ("md: allow suspend_lo and
+ * suspend_hi to decrease as well as increase.")
+ * you could only increase suspend_{lo,hi} unless the region they
+ * covered was empty. So to reset to 0, you need to push suspend_lo
+ * up past suspend_hi first. So to maximize the chance of mdadm
+ * working on all kernels, we want to keep doing that.
+ */
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);
- 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;
for (sd = sra->devs; sd; sd = sd->next) {
if (sd->disk.state & (1<<MD_DISK_FAULTY))
continue;
- if (sd->disk.state & (1<<MD_DISK_SYNC)) {
+ if (sd->disk.state & (1<<MD_DISK_SYNC) &&
+ sd->disk.raid_disk < raid_disks) {
char *dn = map_dev(sd->disk.major,
sd->disk.minor, 1);
fdlist[sd->disk.raid_disk]
long blocks,
int *fdlist,
unsigned long long *offsets,
+ char *sys_name,
int restart)
{
/* Return 1 on success, 0 on any form of failure */
dev = stb.st_dev;
fstat(fd, &stb);
if (stb.st_rdev == dev) {
- pr_err("backup file must NOT be"
- " on the array being reshaped.\n");
+ pr_err("backup file must NOT be on the array being reshaped.\n");
close(*fdlist);
return 0;
}
memset(buf, 0, 512);
for (i=0; i < blocks + 8 ; i++) {
if (write(*fdlist, buf, 512) != 512) {
- pr_err("%s: cannot create"
- " backup file %s: %s\n",
+ pr_err("%s: cannot create backup file %s: %s\n",
devname, backup_file, strerror(errno));
return 0;
}
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:
/* 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
*/
if (info->new_level > 1 &&
(info->component_size & 7))
- return "Cannot convert RAID1 of this size - "
- "reduce size to multiple of 4K first.";
+ return "Cannot convert RAID1 of this size - reduce size to multiple of 4K first.";
if (info->new_level == 0) {
if (info->delta_disks != UnSet &&
info->delta_disks != 0)
- return "Cannot change number of disks "
- "with RAID1->RAID0 conversion";
+ return "Cannot change number of disks with RAID1->RAID0 conversion";
re->level = 0;
re->before.data_disks = 1;
re->after.data_disks = 1;
re->level = 1;
return NULL;
}
+ if (info->array.raid_disks != 2 &&
+ info->new_level == 5)
+ return "Can only convert a 2-device array to RAID5";
if (info->array.raid_disks == 2 &&
info->new_level == 5) {
if (far > 1 && !offset)
return "Cannot reshape RAID10 to far-mode";
if (near * far != copies)
- return "Cannot change number of copies"
- " when reshaping RAID10";
+ return "Cannot change number of copies when reshaping RAID10";
}
if (info->delta_disks == UnSet)
info->delta_disks = 0;
/ info->array.raid_disks);
if (info->array.raid_disks * (copies-1)
!= info->delta_disks)
- return "Impossible number of devices"
- " for RAID0->RAID10";
+ return "Impossible number of devices for RAID0->RAID10";
info->new_layout = 0x100 + copies;
}
if (info->delta_disks == UnSet) {
int copies = info->new_layout & 0xff;
if (info->new_layout != 0x100 + copies)
- return "New layout impossible"
- " for RAID0->RAID10";;
+ return "New layout impossible for RAID0->RAID10";;
info->delta_disks = (copies - 1) *
info->array.raid_disks;
}
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 "Can only convert a 2-device array to RAID1";
if (info->delta_disks != UnSet &&
info->delta_disks != 0)
- return "Cannot set raid_disk when "
- "converting RAID5->RAID1";
+ return "Cannot set raid_disk when converting RAID5->RAID1";
re->level = 1;
info->new_chunk = 0;
return NULL;
switch (re->level) {
case 4:
- re->before.layout = 0;
re->after.layout = 0;
break;
case 5:
strcat(strcpy(layout, ls), "-6");
l = map_name(r6layout, layout);
if (l == UnSet)
- return "Cannot find RAID6 layout"
- " to convert to";
+ return "Cannot find RAID6 layout to convert to";
} else {
/* Current RAID6 has no equivalent.
* If it is already a '-6' layout we
/* 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 &&
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,
struct mdinfo info;
struct mdinfo *sra;
-
if (ioctl(fd, GET_ARRAY_INFO, &array) < 0) {
pr_err("%s is not an active md array - aborting\n",
devname);
if (s->size > 0 &&
(s->chunk || s->level!= UnSet || s->layout_str || s->raiddisks)) {
- pr_err("cannot change component size at the same time "
- "as other changes.\n"
- " Change size first, then check data is intact before "
- "making other changes.\n");
+ pr_err("cannot change component size at the same time as other changes.\n"
+ " Change size first, then check data is intact before making other changes.\n");
return 1;
}
return 1;
}
if (s->raiddisks > st->max_devs) {
- pr_err("Cannot increase raid-disks on this array"
- " beyond %d\n", st->max_devs);
+ pr_err("Cannot increase raid-disks on this array beyond %d\n", st->max_devs);
return 1;
}
+ if (s->level == 0 &&
+ (array.state & (1<<MD_SB_BITMAP_PRESENT)) &&
+ !(array.state & (1<<MD_SB_CLUSTERED))) {
+ array.state &= ~(1<<MD_SB_BITMAP_PRESENT);
+ if (ioctl(fd, SET_ARRAY_INFO, &array)!= 0) {
+ pr_err("failed to remove internal bitmap.\n");
+ return 1;
+ }
+ }
/* in the external case we need to check that the requested reshape is
* supported, and perform an initial check that the container holds the
& (1<<MD_SB_BLOCK_CONTAINER_RESHAPE))
allow_reshape = 0;
if (!allow_reshape) {
- pr_err("cannot reshape arrays in"
- " container with unsupported"
- " metadata: %s(%s)\n",
+ pr_err("cannot reshape arrays in container with unsupported metadata: %s(%s)\n",
devname, container);
sysfs_free(cc);
free(subarray);
if (s->raiddisks > array.raid_disks &&
array.spare_disks +added_disks < (s->raiddisks - array.raid_disks) &&
!c->force) {
- pr_err("Need %d spare%s to avoid degraded array,"
- " and only have %d.\n"
+ pr_err("Need %d spare%s to avoid degraded array, and only have %d.\n"
" Use --force to over-ride this check.\n",
s->raiddisks - array.raid_disks,
s->raiddisks - array.raid_disks == 1 ? "" : "s",
sysfs_free(sra);
return 1;
} else if (frozen < 0) {
- pr_err("%s is performing resync/recovery and cannot"
- " be reshaped\n", devname);
+ pr_err("%s is performing resync/recovery and cannot be reshaped\n", devname);
sysfs_free(sra);
return 1;
}
sizeinfo->array.layout,
sizeinfo->array.raid_disks);
new_size /= data_disks;
- dprintf("Metadata size correction from %llu to "
- "%llu (%llu)\n", orig_size, new_size,
+ dprintf("Metadata size correction from %llu to %llu (%llu)\n", orig_size, new_size,
new_size * data_disks);
s->size = new_size;
sysfs_free(sizeinfo);
}
}
if (rv) {
- pr_err("Cannot set size on "
- "array members.\n");
+ pr_err("Cannot set size on array members.\n");
goto size_change_error;
}
if (min_csize && s->size > min_csize) {
- pr_err("Cannot safely make this array "
- "use more than 2TB per device on this kernel.\n");
+ pr_err("Cannot safely make this array use more than 2TB per device on this kernel.\n");
rv = 1;
goto size_change_error;
}
/* Don't let the kernel choose a size - it will get
* it wrong
*/
- pr_err("Limited v0.90 array to "
- "2TB per device\n");
+ pr_err("Limited v0.90 array to 2TB per device\n");
s->size = min_csize;
}
if (st->ss->external) {
"raid5");
if (!rv) {
raid0_takeover = 1;
- /* get array parametes after takeover
- * to chane one parameter at time only
+ /* get array parameters after takeover
+ * to change one parameter at time only
*/
rv = ioctl(fd, GET_ARRAY_INFO, &array);
}
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
*/
s->size = array.size;
if (c->verbose >= 0) {
if (s->size == orig_size)
- pr_err("component size of %s "
- "unchanged at %lluK\n",
+ pr_err("component size of %s unchanged at %lluK\n",
devname, s->size);
else
- pr_err("component size of %s "
- "has been set to %lluK\n",
+ pr_err("component size of %s has been set to %lluK\n",
devname, s->size);
}
changed = 1;
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;
if (info.array.level == 6 &&
(info.new_level == 6 || info.new_level == UnSet) &&
info.array.layout >= 16) {
- pr_err("%s has a non-standard layout. If you"
- " wish to preserve this\n", devname);
- cont_err("during the reshape, please specify"
- " --layout=preserve\n");
- cont_err("If you want to change it, specify a"
- " layout or use --layout=normalise\n");
+ pr_err("%s has a non-standard layout. If you wish to preserve this\n", devname);
+ cont_err("during the reshape, please specify --layout=preserve\n");
+ cont_err("If you want to change it, specify a layout or use --layout=normalise\n");
rv = 1;
goto release;
}
info.new_layout = map_name(r6layout, l);
}
} else {
- pr_err("%s is only meaningful when reshaping"
- " a RAID6 array.\n", s->layout_str);
+ pr_err("%s is only meaningful when reshaping a RAID6 array.\n", s->layout_str);
rv = 1;
goto release;
}
strcat(l, "-6");
info.new_layout = map_name(r6layout, l);
} else {
- pr_err("%s in only meaningful when reshaping"
- " to RAID6\n", s->layout_str);
+ pr_err("%s in only meaningful when reshaping to RAID6\n", s->layout_str);
rv = 1;
goto release;
}
info.new_layout = parse_layout_faulty(s->layout_str);
break;
default:
- pr_err("layout not meaningful"
- " with this level\n");
+ pr_err("layout not meaningful with this level\n");
rv = 1;
goto release;
}
if (info.new_layout == UnSet) {
- pr_err("layout %s not understood"
- " for this level\n",
+ pr_err("layout %s not understood for this level\n",
s->layout_str);
rv = 1;
goto release;
* number of devices (On-Line Capacity Expansion) must be
* performed at the level of the container
*/
+ if (fd > 0) {
+ close(fd);
+ fd = -1;
+ }
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,
info->array.raid_disks);
if (info->reshape_progress < position) {
- dprintf("Corrected reshape progress (%llu) to "
- "md position (%llu)\n",
+ dprintf("Corrected reshape progress (%llu) to md position (%llu)\n",
info->reshape_progress, position);
info->reshape_progress = position;
ret_val = 1;
} else if (info->reshape_progress > position) {
- pr_err("Fatal error: array "
- "reshape was not properly frozen "
- "(expected reshape position is %llu, "
- "but reshape progress is %llu.\n",
+ pr_err("Fatal error: array reshape was not properly frozen (expected reshape position is %llu, but reshape progress is %llu.\n",
position, info->reshape_progress);
ret_val = -1;
} else {
- dprintf("Reshape position in md and metadata "
- "are the same;");
+ dprintf("Reshape position in md and metadata are the same;");
ret_val = 1;
}
}
return ret_val;
}
+static unsigned long long choose_offset(unsigned long long lo,
+ unsigned long long hi,
+ unsigned long long min,
+ unsigned long long max)
+{
+ /* 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 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.
+ */
+ unsigned long long choice = (lo + hi) / 2;
+ unsigned long long bit = 1;
+
+ 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;
+ }
+ return choice;
+}
+
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)
+ 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;
if (info2.space_before == 0 &&
info2.space_after == 0) {
/* Metadata doesn't support data_offset changes */
- return 1;
+ if (!can_fallback)
+ 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 == INVALID_SECTORS)
- info2.new_data_offset = info2.data_offset + min;
+ new_data_offset = sd->data_offset + min;
else {
- if (data_offset < info2.data_offset + min) {
+ 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 (delta_disks > 0) {
/* need space before */
- if (info2.space_before < min) {
+ if (before < min) {
+ if (can_fallback)
+ goto fallback;
pr_err("Insufficient head-space for reshape on %s\n",
dn);
goto release;
}
if (data_offset == INVALID_SECTORS)
- info2.new_data_offset = info2.data_offset - min;
+ new_data_offset = sd->data_offset - min;
else {
- if (data_offset > info2.data_offset - min) {
+ 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 == INVALID_SECTORS) {
- 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) {
+ 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 != INVALID_SECTORS &&
- data_offset < info2.data_offset + min) {
+ data_offset < sd->data_offset + min) {
pr_err("--data-offset too small on %s\n",
dn);
goto release;
}
if (data_offset != INVALID_SECTORS)
- 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) {
+ 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 != INVALID_SECTORS &&
- data_offset < info2.data_offset - min) {
+ data_offset < sd->data_offset - min) {
pr_err("--data-offset too small on %s\n",
dn);
goto release;
}
if (data_offset != INVALID_SECTORS)
- 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;
+ 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;
- err = -1;
+ 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);
return err;
release:
return -1;
+fallback:
+ /* Just use a backup file */
+ return 1;
}
static int raid10_reshape(char *container, int fd, char *devname,
}
}
err = set_new_data_offset(sra, st, devname, info->delta_disks, data_offset,
- min);
+ min, 0);
if (err == 1) {
pr_err("Cannot set new_data_offset: RAID10 reshape not\n");
cont_err("supported on this kernel\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");
+ cont_err(" Bitmap must be removed before shape can be changed\n");
goto release;
}
sysfs_free(sra);
/* 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 */
+ cache /= (4096/512); /* Convert from sectors to pages */
if (sra->cache_size < cache)
subarray_set_num(container, sra, "stripe_cache_size",
if (err == EBUSY &&
(array.state & (1<<MD_SB_BITMAP_PRESENT)))
- cont_err("Bitmap must be removed before"
- " shape can be changed\n");
+ cont_err("Bitmap must be removed before shape can be changed\n");
goto release;
}
if (err == EBUSY &&
(array.state & (1<<MD_SB_BITMAP_PRESENT)))
- cont_err("Bitmap must be removed before"
- " shape can be changed\n");
+ cont_err("Bitmap must be removed before shape can be changed\n");
goto 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,
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 &&
reshape.before.layout != info->array.layout ||
reshape.before.data_disks + reshape.parity
!= info->array.raid_disks - max(0, info->delta_disks))) {
- pr_err("reshape info is not in native format -"
- " cannot continue.\n");
+ pr_err("reshape info is not in native format - cannot continue.\n");
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 (!force &&
info->new_level > 1 && info->array.level > 1 &&
spares_needed > info->array.spare_disks + added_disks) {
- pr_err("Need %d spare%s to avoid degraded array,"
- " and only have %d.\n"
+ pr_err("Need %d spare%s to avoid degraded array, and only have %d.\n"
" Use --force to over-ride this check.\n",
spares_needed,
spares_needed == 1 ? "" : "s",
- array.raid_disks;
if ((info->new_level > 1 || info->new_level == 0) &&
spares_needed > info->array.spare_disks +added_disks) {
- pr_err("Need %d spare%s to create working array,"
- " and only have %d.\n",
+ pr_err("Need %d spare%s to create working array, and only have %d.\n",
spares_needed,
spares_needed == 1 ? "" : "s",
info->array.spare_disks + added_disks);
}
if (reshape.level != array.level) {
- char *c = map_num(pers, reshape.level);
- int err;
- if (c == NULL)
+ int err = impose_level(fd, reshape.level, devname, verbose);
+ if (err)
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");
- 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);
* array. Now that the array has been changed to the right
* level and frozen, we can safely add them.
*/
- if (devlist)
- Manage_subdevs(devname, fd, devlist, verbose,
- 0,NULL, 0);
-
+ if (devlist) {
+ if (Manage_subdevs(devname, fd, devlist, verbose,
+ 0, NULL, 0))
+ goto release;
+ }
- if (reshape.backup_blocks == 0 && data_offset)
+ 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
goto release;
}
-started:
-
if (array.level == 10) {
/* Reshaping RAID10 does not require any data backup by
* user-space. Instead it requires that the data_offset
}
if (!backup_file)
- switch(set_new_data_offset(sra, st, devname, info->delta_disks,
+ switch(set_new_data_offset(sra, st, devname,
+ reshape.after.data_disks - reshape.before.data_disks,
data_offset,
- reshape.min_offset_change)) {
+ reshape.min_offset_change, 1)) {
case -1:
goto release;
case 0:
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;
+ struct mdinfo *sd;
+ if (errno != EINVAL) {
+ pr_err("Failed to initiate reshape!\n");
+ goto release;
+ }
+ /* revert data_offset and try the old way */
+ for (sd = sra->devs; sd; sd = sd->next) {
+ sysfs_set_num(sra, sd, "new_offset",
+ sd->data_offset);
+ sysfs_set_str(sra, NULL, "reshape_direction",
+ "forwards");
+ }
+ break;
}
-
+ 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) {
break;
}
+started:
/* Decide how many blocks (sectors) for a reshape
* unit. The number we have so far is just a minimum
*/
blocks < 16*1024*2)
blocks *= 2;
} else
- pr_err("Need to backup %luK of critical "
- "section..\n", blocks/2);
+ pr_err("Need to backup %luK of critical section..\n", blocks/2);
if (blocks >= sra->component_size/2) {
- pr_err("%s: Something wrong"
- " - reshape aborted\n",
+ pr_err("%s: Something wrong - reshape aborted\n",
devname);
goto release;
}
d = reshape_prepare_fdlist(devname, sra, odisks,
nrdisks, blocks, backup_file,
fdlist, offsets);
- if (d < 0) {
+ if (d < odisks) {
goto release;
}
if ((st->ss->manage_reshape == NULL) ||
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 - "
- "need a spare or backup-file to backup "
- "critical section\n", devname);
+ } else if (d == odisks) {
+ pr_err("%s: Cannot grow - need a spare or backup-file to backup critical section\n", devname);
goto release;
}
} else {
if (!reshape_open_backup_file(backup_file, fd, devname,
(signed)blocks,
fdlist+d, offsets+d,
+ sra->sys_name,
restart)) {
goto release;
}
free(fdlist);
free(offsets);
sysfs_free(sra);
- pr_err("Reshape has to be continued from"
- " location %llu when root filesystem has been mounted.\n",
+ pr_err("Reshape has to be continued from location %llu when root filesystem has been mounted.\n",
sra->reshape_progress);
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);
+ mds = mdstat_read(1, 0);
for (m = mds; m; m = m->next)
if (strcmp(m->devnm, sra->sys_name) == 0) {
if (m->resync &&
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) - 1);
+ if (l > 0) {
+ buf[l]=0;
+ unlink(buf);
+ }
+ unlink(bul);
+ free(bul);
+ }
unlink(backup_file);
+ }
if (!done) {
abort_reshape(sra);
goto out;
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;
*/
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;
+ dev_t devid;
sysfs_free(cc);
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;
}
* 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;
}
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);
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)
* So we need these extra tests.
*/
if (completed == 0 && advancing
+ && strncmp(action, "idle", 4) == 0
&& info->reshape_progress > 0)
break;
if (completed == 0 && !advancing
+ && strncmp(action, "idle", 4) == 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;
}
/* Some kernels reset 'sync_completed' to zero,
- * we need to have real point we are in md
+ * we need to have real point we are in md.
+ * So in that case, read 'reshape_position' from sysfs.
*/
- if (completed == 0)
- completed = max_progress;
-
- /* some kernels can give an incorrectly high 'completed' number */
- completed /= (info->new_chunk/512);
- completed *= (info->new_chunk/512);
- /* Convert 'completed' back in to a 'progress' number */
- completed *= reshape->after.data_disks;
- if (!advancing) {
- completed = info->component_size * reshape->after.data_disks
- - completed;
+ if (completed == 0) {
+ unsigned long long reshapep;
+ char action[20];
+ if (sysfs_get_str(info, NULL, "sync_action",
+ action, 20) > 0 &&
+ strncmp(action, "idle", 4) == 0 &&
+ sysfs_get_ll(info, NULL,
+ "reshape_position", &reshapep) == 0)
+ *reshape_completed = reshapep;
+ } else {
+ /* some kernels can give an incorrectly high
+ * 'completed' number, so round down */
+ completed /= (info->new_chunk/512);
+ completed *= (info->new_chunk/512);
+ /* Convert 'completed' back in to a 'progress' number */
+ completed *= reshape->after.data_disks;
+ if (!advancing)
+ completed = (info->component_size
+ * reshape->after.data_disks
+ - completed);
+ *reshape_completed = completed;
}
- *reshape_completed = completed;
close(fd);
* it was just a device failure that leaves us degraded but
* functioning.
*/
- strcpy(buf, "hi");
if (sysfs_get_str(info, NULL, "reshape_position", buf, sizeof(buf)) < 0
|| strncmp(buf, "none", 4) != 0) {
/* 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);
* sometimes they aren't... So allow considerable flexability in matching, and allow
* this test to be overridden by an environment variable.
*/
- if (info->array.utime > (int)__le64_to_cpu(bsb.mtime) + 2*60*60 ||
- info->array.utime < (int)__le64_to_cpu(bsb.mtime) - 10*60) {
+ if(time_after(info->array.utime, (unsigned int)__le64_to_cpu(bsb.mtime) + 2*60*60) ||
+ time_before(info->array.utime, (unsigned int)__le64_to_cpu(bsb.mtime) - 10*60)) {
if (check_env("MDADM_GROW_ALLOW_OLD")) {
- pr_err("accepting backup with timestamp %lu "
- "for array with timestamp %lu\n",
+ pr_err("accepting backup with timestamp %lu for array with timestamp %lu\n",
(unsigned long)__le64_to_cpu(bsb.mtime),
(unsigned long)info->array.utime);
} else {
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,
struct mdinfo *cc = NULL;
struct mdstat_ent *mdstat = NULL;
int cfd = -1;
- int fd2 = -1;
+ int fd2;
dprintf("Grow continue from command line called for %s\n",
devname);
dprintf("Grow continue is run for ");
if (st->ss->external == 0) {
int d;
- dprintf("native array (%s)\n", devname);
+ int cnt = 5;
+ 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);
+ pr_err("%s is not an active md array - aborting\n", devname);
ret_val = 1;
goto Grow_continue_command_exit;
}
* FIXME we should really get what we need from
* sysfs
*/
- for (d = 0; d < MAX_DISKS; d++) {
- mdu_disk_info_t disk;
- char *dv;
- int err;
- disk.number = d;
- if (ioctl(fd, GET_DISK_INFO, &disk) < 0)
- continue;
- if (disk.major == 0 && disk.minor == 0)
- continue;
- if ((disk.state & (1 << MD_DISK_ACTIVE)) == 0)
- continue;
- dv = map_dev(disk.major, disk.minor, 1);
- if (!dv)
- continue;
- fd2 = dev_open(dv, O_RDONLY);
- if (fd2 < 0)
- continue;
- err = st->ss->load_super(st, fd2, NULL);
- close(fd2);
- if (err)
- continue;
- break;
- }
- if (d == MAX_DISKS) {
- pr_err("Unable to load metadata for %s\n",
- devname);
- ret_val = 1;
- goto Grow_continue_command_exit;
- }
- st->ss->getinfo_super(st, content, NULL);
+ do {
+ for (d = 0; d < MAX_DISKS; d++) {
+ mdu_disk_info_t disk;
+ char *dv;
+ int err;
+ disk.number = d;
+ if (ioctl(fd, GET_DISK_INFO, &disk) < 0)
+ continue;
+ if (disk.major == 0 && disk.minor == 0)
+ continue;
+ if ((disk.state & (1 << MD_DISK_ACTIVE)) == 0)
+ continue;
+ dv = map_dev(disk.major, disk.minor, 1);
+ if (!dv)
+ continue;
+ fd2 = dev_open(dv, O_RDONLY);
+ if (fd2 < 0)
+ continue;
+ err = st->ss->load_super(st, fd2, NULL);
+ close(fd2);
+ if (err)
+ continue;
+ break;
+ }
+ if (d == MAX_DISKS) {
+ pr_err("Unable to load metadata for %s\n",
+ devname);
+ ret_val = 1;
+ goto Grow_continue_command_exit;
+ }
+ st->ss->getinfo_super(st, content, NULL);
+ if (!content->reshape_active)
+ sleep(3);
+ else
+ break;
+ } while (cnt-- > 0);
} else {
char *container;
if (subarray) {
- dprintf("subarray (%s)\n", subarray);
+ dprintf_cont("subarray (%s)\n", subarray);
container = st->container_devnm;
cfd = open_dev_excl(st->container_devnm);
} else {
container = st->devnm;
close(fd);
cfd = open_dev_excl(st->devnm);
- dprintf("container (%s)\n", container);
+ dprintf_cont("container (%s)\n", container);
fd = cfd;
}
if (cfd < 0) {
- pr_err("Unable to open container "
- "for %s\n", devname);
+ pr_err("Unable to open container for %s\n", devname);
ret_val = 1;
goto Grow_continue_command_exit;
}
allow_reshape = 0;
if (!allow_reshape) {
- pr_err("cannot continue reshape of an array"
- " in container with unsupported"
- " metadata: %s(%s)\n",
+ pr_err("cannot continue reshape of an array in container with unsupported metadata: %s(%s)\n",
devname, container);
ret_val = 1;
goto Grow_continue_command_exit;
break;
}
if (!content) {
- pr_err("Unable to determine reshaped "
- "array for %s\n", devname);
+ pr_err("Unable to determine reshaped array for %s\n", devname);
ret_val = 1;
goto Grow_continue_command_exit;
}
sysfs_init(content, fd2, mdstat->devnm);
+ close(fd2);
+
/* start mdmon in case it is not running
*/
if (!mdmon_running(container))
if (mdmon_running(container))
st->update_tail = &st->updates;
else {
- pr_err("No mdmon found. "
- "Grow cannot continue.\n");
+ pr_err("No mdmon found. Grow cannot continue.\n");
ret_val = 1;
goto Grow_continue_command_exit;
}
/* 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)
- close(fd2);
if (cfd > -1)
close(cfd);
st->ss->free_super(st);
}
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;
close(cfd);
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