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-rw-r--r--Create.c565
-rw-r--r--ReadMe.c2
-rw-r--r--mdadm.8.in18
-rw-r--r--mdadm.c9
-rw-r--r--mdadm.h7
-rw-r--r--tests/00raid5-zero12
6 files changed, 437 insertions, 176 deletions
diff --git a/Create.c b/Create.c
index 953e737..bbe9e13 100644
--- a/Create.c
+++ b/Create.c
@@ -26,6 +26,10 @@
#include "md_u.h"
#include "md_p.h"
#include <ctype.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <sys/signalfd.h>
+#include <sys/wait.h>
static int round_size_and_verify(unsigned long long *size, int chunk)
{
@@ -91,6 +95,382 @@ int default_layout(struct supertype *st, int level, int verbose)
return layout;
}
+static pid_t write_zeroes_fork(int fd, struct shape *s, struct supertype *st,
+ struct mddev_dev *dv)
+
+{
+ const unsigned long long req_size = 1 << 30;
+ unsigned long long offset_bytes, size_bytes, sz;
+ sigset_t sigset;
+ int ret = 0;
+ pid_t pid;
+
+ size_bytes = KIB_TO_BYTES(s->size);
+
+ /*
+ * If size_bytes is zero, this is a zoned raid array where
+ * each disk is of a different size and uses its full
+ * disk. Thus zero the entire disk.
+ */
+ if (!size_bytes && !get_dev_size(fd, dv->devname, &size_bytes))
+ return -1;
+
+ if (dv->data_offset != INVALID_SECTORS)
+ offset_bytes = SEC_TO_BYTES(dv->data_offset);
+ else
+ offset_bytes = SEC_TO_BYTES(st->data_offset);
+
+ pr_info("zeroing data from %lld to %lld on: %s\n",
+ offset_bytes, size_bytes, dv->devname);
+
+ pid = fork();
+ if (pid < 0) {
+ pr_err("Could not fork to zero disks: %s\n", strerror(errno));
+ return pid;
+ } else if (pid != 0) {
+ return pid;
+ }
+
+ sigemptyset(&sigset);
+ sigaddset(&sigset, SIGINT);
+ sigprocmask(SIG_UNBLOCK, &sigset, NULL);
+
+ while (size_bytes) {
+ /*
+ * Split requests to the kernel into 1GB chunks seeing the
+ * fallocate() call is not interruptible and blocking a
+ * ctrl-c for several minutes is not desirable.
+ *
+ * 1GB is chosen as a compromise: the user may still have
+ * to wait several seconds if they ctrl-c on devices that
+ * zero slowly, but will reduce the number of requests
+ * required and thus the overhead on devices that perform
+ * better.
+ */
+ sz = size_bytes;
+ if (sz >= req_size)
+ sz = req_size;
+
+ if (fallocate(fd, FALLOC_FL_ZERO_RANGE | FALLOC_FL_KEEP_SIZE,
+ offset_bytes, sz)) {
+ pr_err("zeroing %s failed: %s\n", dv->devname,
+ strerror(errno));
+ ret = 1;
+ break;
+ }
+
+ offset_bytes += sz;
+ size_bytes -= sz;
+ }
+
+ exit(ret);
+}
+
+static int wait_for_zero_forks(int *zero_pids, int count)
+{
+ int wstatus, ret = 0, i, sfd, wait_count = 0;
+ struct signalfd_siginfo fdsi;
+ bool interrupted = false;
+ sigset_t sigset;
+ ssize_t s;
+
+ for (i = 0; i < count; i++)
+ if (zero_pids[i])
+ wait_count++;
+ if (!wait_count)
+ return 0;
+
+ sigemptyset(&sigset);
+ sigaddset(&sigset, SIGINT);
+ sigaddset(&sigset, SIGCHLD);
+ sigprocmask(SIG_BLOCK, &sigset, NULL);
+
+ sfd = signalfd(-1, &sigset, 0);
+ if (sfd < 0) {
+ pr_err("Unable to create signalfd: %s\n", strerror(errno));
+ return 1;
+ }
+
+ while (1) {
+ s = read(sfd, &fdsi, sizeof(fdsi));
+ if (s != sizeof(fdsi)) {
+ pr_err("Invalid signalfd read: %s\n", strerror(errno));
+ close(sfd);
+ return 1;
+ }
+
+ if (fdsi.ssi_signo == SIGINT) {
+ printf("\n");
+ pr_info("Interrupting zeroing processes, please wait...\n");
+ interrupted = true;
+ } else if (fdsi.ssi_signo == SIGCHLD) {
+ if (!--wait_count)
+ break;
+ }
+ }
+
+ close(sfd);
+
+ for (i = 0; i < count; i++) {
+ if (!zero_pids[i])
+ continue;
+
+ waitpid(zero_pids[i], &wstatus, 0);
+ zero_pids[i] = 0;
+ if (!WIFEXITED(wstatus) || WEXITSTATUS(wstatus))
+ ret = 1;
+ }
+
+ if (interrupted) {
+ pr_err("zeroing interrupted!\n");
+ return 1;
+ }
+
+ if (ret)
+ pr_err("zeroing failed!\n");
+ else
+ pr_info("zeroing finished\n");
+
+ return ret;
+}
+
+static int add_disk_to_super(int mdfd, struct shape *s, struct context *c,
+ struct supertype *st, struct mddev_dev *dv,
+ struct mdinfo *info, int have_container, int major_num,
+ int *zero_pid)
+{
+ dev_t rdev;
+ int fd;
+
+ if (dv->disposition == 'j') {
+ info->disk.raid_disk = MD_DISK_ROLE_JOURNAL;
+ info->disk.state = (1<<MD_DISK_JOURNAL);
+ } else if (info->disk.raid_disk < s->raiddisks) {
+ info->disk.state = (1<<MD_DISK_ACTIVE) |
+ (1<<MD_DISK_SYNC);
+ } else {
+ info->disk.state = 0;
+ }
+
+ if (dv->writemostly == FlagSet) {
+ if (major_num == BITMAP_MAJOR_CLUSTERED) {
+ pr_err("Can not set %s --write-mostly with a clustered bitmap\n",dv->devname);
+ return 1;
+ } else {
+ info->disk.state |= (1<<MD_DISK_WRITEMOSTLY);
+ }
+
+ }
+
+ if (dv->failfast == FlagSet)
+ info->disk.state |= (1<<MD_DISK_FAILFAST);
+
+ if (have_container) {
+ fd = -1;
+ } else {
+ if (st->ss->external && st->container_devnm[0])
+ fd = open(dv->devname, O_RDWR);
+ else
+ fd = open(dv->devname, O_RDWR|O_EXCL);
+
+ if (fd < 0) {
+ pr_err("failed to open %s after earlier success - aborting\n",
+ dv->devname);
+ return 1;
+ }
+ if (!fstat_is_blkdev(fd, dv->devname, &rdev))
+ return 1;
+ info->disk.major = major(rdev);
+ info->disk.minor = minor(rdev);
+ }
+ if (fd >= 0)
+ remove_partitions(fd);
+ if (st->ss->add_to_super(st, &info->disk, fd, dv->devname,
+ dv->data_offset)) {
+ ioctl(mdfd, STOP_ARRAY, NULL);
+ return 1;
+ }
+ st->ss->getinfo_super(st, info, NULL);
+
+ if (fd >= 0 && s->write_zeroes) {
+ *zero_pid = write_zeroes_fork(fd, s, st, dv);
+ if (*zero_pid <= 0) {
+ ioctl(mdfd, STOP_ARRAY, NULL);
+ return 1;
+ }
+ }
+
+ if (have_container && c->verbose > 0)
+ pr_err("Using %s for device %d\n",
+ map_dev(info->disk.major, info->disk.minor, 0),
+ info->disk.number);
+
+ if (!have_container) {
+ /* getinfo_super might have lost these ... */
+ info->disk.major = major(rdev);
+ info->disk.minor = minor(rdev);
+ }
+
+ return 0;
+}
+
+static int update_metadata(int mdfd, struct shape *s, struct supertype *st,
+ struct map_ent **map, struct mdinfo *info,
+ char *chosen_name)
+{
+ struct mdinfo info_new;
+ struct map_ent *me = NULL;
+
+ /* check to see if the uuid has changed due to these
+ * metadata changes, and if so update the member array
+ * and container uuid. Note ->write_init_super clears
+ * the subarray cursor such that ->getinfo_super once
+ * again returns container info.
+ */
+ st->ss->getinfo_super(st, &info_new, NULL);
+ if (st->ss->external && is_container(s->level) &&
+ !same_uuid(info_new.uuid, info->uuid, 0)) {
+ map_update(map, fd2devnm(mdfd),
+ info_new.text_version,
+ info_new.uuid, chosen_name);
+ me = map_by_devnm(map, st->container_devnm);
+ }
+
+ if (st->ss->write_init_super(st)) {
+ st->ss->free_super(st);
+ return 1;
+ }
+
+ /*
+ * Before activating the array, perform extra steps
+ * required to configure the internal write-intent
+ * bitmap.
+ */
+ if (info_new.consistency_policy == CONSISTENCY_POLICY_BITMAP &&
+ st->ss->set_bitmap && st->ss->set_bitmap(st, info)) {
+ st->ss->free_super(st);
+ return 1;
+ }
+
+ /* update parent container uuid */
+ if (me) {
+ char *path = xstrdup(me->path);
+
+ st->ss->getinfo_super(st, &info_new, NULL);
+ map_update(map, st->container_devnm, info_new.text_version,
+ info_new.uuid, path);
+ free(path);
+ }
+
+ flush_metadata_updates(st);
+ st->ss->free_super(st);
+
+ return 0;
+}
+
+static int add_disks(int mdfd, struct mdinfo *info, struct shape *s,
+ struct context *c, struct supertype *st,
+ struct map_ent **map, struct mddev_dev *devlist,
+ int total_slots, int have_container, int insert_point,
+ int major_num, char *chosen_name)
+{
+ struct mddev_dev *moved_disk = NULL;
+ int pass, raid_disk_num, dnum;
+ int zero_pids[total_slots];
+ struct mddev_dev *dv;
+ struct mdinfo *infos;
+ sigset_t sigset, orig_sigset;
+ int ret = 0;
+
+ /*
+ * Block SIGINT so the main thread will always wait for the
+ * zeroing processes when being interrupted. Otherwise the
+ * zeroing processes will finish their work in the background
+ * keeping the disk busy.
+ */
+ sigemptyset(&sigset);
+ sigaddset(&sigset, SIGINT);
+ sigprocmask(SIG_BLOCK, &sigset, &orig_sigset);
+ memset(zero_pids, 0, sizeof(zero_pids));
+
+ infos = xmalloc(sizeof(*infos) * total_slots);
+ enable_fds(total_slots);
+ for (pass = 1; pass <= 2; pass++) {
+ for (dnum = 0, raid_disk_num = 0, dv = devlist; dv;
+ dv = (dv->next) ? (dv->next) : moved_disk, dnum++) {
+ if (dnum >= total_slots)
+ abort();
+ if (dnum == insert_point) {
+ raid_disk_num += 1;
+ moved_disk = dv;
+ continue;
+ }
+ if (strcasecmp(dv->devname, "missing") == 0) {
+ raid_disk_num += 1;
+ continue;
+ }
+ if (have_container)
+ moved_disk = NULL;
+ if (have_container && dnum < total_slots - 1)
+ /* repeatedly use the container */
+ moved_disk = dv;
+
+ switch(pass) {
+ case 1:
+ infos[dnum] = *info;
+ infos[dnum].disk.number = dnum;
+ infos[dnum].disk.raid_disk = raid_disk_num++;
+
+ if (dv->disposition == 'j')
+ raid_disk_num--;
+
+ ret = add_disk_to_super(mdfd, s, c, st, dv,
+ &infos[dnum], have_container,
+ major_num, &zero_pids[dnum]);
+ if (ret)
+ goto out;
+
+ break;
+ case 2:
+ infos[dnum].errors = 0;
+
+ ret = add_disk(mdfd, st, info, &infos[dnum]);
+ if (ret) {
+ pr_err("ADD_NEW_DISK for %s failed: %s\n",
+ dv->devname, strerror(errno));
+ if (errno == EINVAL &&
+ info->array.level == 0) {
+ pr_err("Possibly your kernel doesn't support RAID0 layouts.\n");
+ pr_err("Either upgrade, or use --layout=dangerous\n");
+ }
+ goto out;
+ }
+ break;
+ }
+ if (!have_container &&
+ dv == moved_disk && dnum != insert_point) break;
+ }
+
+ if (pass == 1) {
+ ret = wait_for_zero_forks(zero_pids, total_slots);
+ if (ret)
+ goto out;
+
+ ret = update_metadata(mdfd, s, st, map, info,
+ chosen_name);
+ if (ret)
+ goto out;
+ }
+ }
+
+out:
+ if (ret)
+ wait_for_zero_forks(zero_pids, total_slots);
+ free(infos);
+ sigprocmask(SIG_SETMASK, &orig_sigset, NULL);
+ return ret;
+}
+
int Create(struct supertype *st, char *mddev,
char *name, int *uuid,
int subdevs, struct mddev_dev *devlist,
@@ -117,7 +497,7 @@ int Create(struct supertype *st, char *mddev,
unsigned long long minsize = 0, maxsize = 0;
char *mindisc = NULL;
char *maxdisc = NULL;
- int dnum, raid_disk_num;
+ int dnum;
struct mddev_dev *dv;
dev_t rdev;
int fail = 0, warn = 0;
@@ -126,18 +506,16 @@ int Create(struct supertype *st, char *mddev,
int missing_disks = 0;
int insert_point = subdevs * 2; /* where to insert a missing drive */
int total_slots;
- int pass;
int rv;
int bitmap_fd;
int have_container = 0;
int container_fd = -1;
int need_mdmon = 0;
unsigned long long bitmapsize;
- struct mdinfo info, *infos;
+ struct mdinfo info;
int did_default = 0;
int do_default_layout = 0;
int do_default_chunk = 0;
- unsigned long safe_mode_delay = 0;
char chosen_name[1024];
struct map_ent *map = NULL;
unsigned long long newsize;
@@ -778,11 +1156,12 @@ int Create(struct supertype *st, char *mddev,
mdi = sysfs_read(-1, devnm, GET_VERSION);
- pr_err("Creating array inside %s container %s\n",
+ pr_info("Creating array inside %s container %s\n",
mdi?mdi->text_version:"managed", devnm);
sysfs_free(mdi);
} else
- pr_err("Defaulting to version %s metadata\n", info.text_version);
+ pr_info("Defaulting to version %s metadata\n",
+ info.text_version);
}
map_update(&map, fd2devnm(mdfd), info.text_version,
@@ -870,175 +1249,11 @@ int Create(struct supertype *st, char *mddev,
}
}
- infos = xmalloc(sizeof(*infos) * total_slots);
- enable_fds(total_slots);
- for (pass = 1; pass <= 2; pass++) {
- struct mddev_dev *moved_disk = NULL; /* the disk that was moved out of the insert point */
-
- for (dnum = 0, raid_disk_num = 0, dv = devlist; dv;
- dv = (dv->next) ? (dv->next) : moved_disk, dnum++) {
- int fd;
- struct mdinfo *inf = &infos[dnum];
-
- if (dnum >= total_slots)
- abort();
- if (dnum == insert_point) {
- raid_disk_num += 1;
- moved_disk = dv;
- continue;
- }
- if (strcasecmp(dv->devname, "missing") == 0) {
- raid_disk_num += 1;
- continue;
- }
- if (have_container)
- moved_disk = NULL;
- if (have_container && dnum < info.array.raid_disks - 1)
- /* repeatedly use the container */
- moved_disk = dv;
-
- switch(pass) {
- case 1:
- *inf = info;
-
- inf->disk.number = dnum;
- inf->disk.raid_disk = raid_disk_num++;
-
- if (dv->disposition == 'j') {
- inf->disk.raid_disk = MD_DISK_ROLE_JOURNAL;
- inf->disk.state = (1<<MD_DISK_JOURNAL);
- raid_disk_num--;
- } else if (inf->disk.raid_disk < s->raiddisks)
- inf->disk.state = (1<<MD_DISK_ACTIVE) |
- (1<<MD_DISK_SYNC);
- else
- inf->disk.state = 0;
-
- if (dv->writemostly == FlagSet) {
- if (major_num == BITMAP_MAJOR_CLUSTERED) {
- pr_err("Can not set %s --write-mostly with a clustered bitmap\n",dv->devname);
- goto abort_locked;
- } else
- inf->disk.state |= (1<<MD_DISK_WRITEMOSTLY);
- }
- if (dv->failfast == FlagSet)
- inf->disk.state |= (1<<MD_DISK_FAILFAST);
-
- if (have_container)
- fd = -1;
- else {
- if (st->ss->external &&
- st->container_devnm[0])
- fd = open(dv->devname, O_RDWR);
- else
- fd = open(dv->devname, O_RDWR|O_EXCL);
-
- if (fd < 0) {
- pr_err("failed to open %s after earlier success - aborting\n",
- dv->devname);
- goto abort_locked;
- }
- if (!fstat_is_blkdev(fd, dv->devname, &rdev))
- return 1;
- inf->disk.major = major(rdev);
- inf->disk.minor = minor(rdev);
- }
- if (fd >= 0)
- remove_partitions(fd);
- if (st->ss->add_to_super(st, &inf->disk,
- fd, dv->devname,
- dv->data_offset)) {
- ioctl(mdfd, STOP_ARRAY, NULL);
- goto abort_locked;
- }
- st->ss->getinfo_super(st, inf, NULL);
- safe_mode_delay = inf->safe_mode_delay;
-
- if (have_container && c->verbose > 0)
- pr_err("Using %s for device %d\n",
- map_dev(inf->disk.major,
- inf->disk.minor,
- 0), dnum);
-
- if (!have_container) {
- /* getinfo_super might have lost these ... */
- inf->disk.major = major(rdev);
- inf->disk.minor = minor(rdev);
- }
- break;
- case 2:
- inf->errors = 0;
-
- rv = add_disk(mdfd, st, &info, inf);
-
- if (rv) {
- pr_err("ADD_NEW_DISK for %s failed: %s\n",
- dv->devname, strerror(errno));
- if (errno == EINVAL &&
- info.array.level == 0) {
- pr_err("Possibly your kernel doesn't support RAID0 layouts.\n");
- pr_err("Either upgrade, or use --layout=dangerous\n");
- }
- goto abort_locked;
- }
- break;
- }
- if (!have_container &&
- dv == moved_disk && dnum != insert_point) break;
- }
- if (pass == 1) {
- struct mdinfo info_new;
- struct map_ent *me = NULL;
-
- /* check to see if the uuid has changed due to these
- * metadata changes, and if so update the member array
- * and container uuid. Note ->write_init_super clears
- * the subarray cursor such that ->getinfo_super once
- * again returns container info.
- */
- st->ss->getinfo_super(st, &info_new, NULL);
- if (st->ss->external && !is_container(s->level) &&
- !same_uuid(info_new.uuid, info.uuid, 0)) {
- map_update(&map, fd2devnm(mdfd),
- info_new.text_version,
- info_new.uuid, chosen_name);
- me = map_by_devnm(&map, st->container_devnm);
- }
-
- if (st->ss->write_init_super(st)) {
- st->ss->free_super(st);
- goto abort_locked;
- }
- /*
- * Before activating the array, perform extra steps
- * required to configure the internal write-intent
- * bitmap.
- */
- if (info_new.consistency_policy ==
- CONSISTENCY_POLICY_BITMAP &&
- st->ss->set_bitmap &&
- st->ss->set_bitmap(st, &info)) {
- st->ss->free_super(st);
- goto abort_locked;
- }
-
- /* update parent container uuid */
- if (me) {
- char *path = xstrdup(me->path);
-
- st->ss->getinfo_super(st, &info_new, NULL);
- map_update(&map, st->container_devnm,
- info_new.text_version,
- info_new.uuid, path);
- free(path);
- }
+ if (add_disks(mdfd, &info, s, c, st, &map, devlist, total_slots,
+ have_container, insert_point, major_num, chosen_name))
+ goto abort_locked;
- flush_metadata_updates(st);
- st->ss->free_super(st);
- }
- }
map_unlock(&map);
- free(infos);
if (is_container(s->level)) {
/* No need to start. But we should signal udev to
@@ -1065,7 +1280,7 @@ int Create(struct supertype *st, char *mddev,
"readonly");
break;
}
- sysfs_set_safemode(&info, safe_mode_delay);
+ sysfs_set_safemode(&info, info.safe_mode_delay);
if (err) {
pr_err("failed to activate array.\n");
ioctl(mdfd, STOP_ARRAY, NULL);
@@ -1103,7 +1318,7 @@ int Create(struct supertype *st, char *mddev,
ioctl(mdfd, RESTART_ARRAY_RW, NULL);
}
if (c->verbose >= 0)
- pr_err("array %s started.\n", mddev);
+ pr_info("array %s started.\n", mddev);
if (st->ss->external && st->container_devnm[0]) {
if (need_mdmon)
start_mdmon(st->container_devnm);
diff --git a/ReadMe.c b/ReadMe.c
index bd8d50d..db251ed 100644
--- a/ReadMe.c
+++ b/ReadMe.c
@@ -138,6 +138,7 @@ struct option long_options[] = {
{"size", 1, 0, 'z'},
{"auto", 1, 0, Auto}, /* also for --assemble */
{"assume-clean",0,0, AssumeClean },
+ {"write-zeroes",0,0, WriteZeroes },
{"metadata", 1, 0, 'e'}, /* superblock format */
{"bitmap", 1, 0, Bitmap},
{"bitmap-chunk", 1, 0, BitmapChunk},
@@ -390,6 +391,7 @@ char Help_create[] =
" --write-journal= : Specify journal device for RAID-4/5/6 array\n"
" --consistency-policy= : Specify the policy that determines how the array\n"
" -k : maintains consistency in case of unexpected shutdown.\n"
+" --write-zeroes : Write zeroes to the disks before creating. This will bypass initial sync.\n"
"\n"
;
diff --git a/mdadm.8.in b/mdadm.8.in
index 64f71ed..6f0f6c1 100644
--- a/mdadm.8.in
+++ b/mdadm.8.in
@@ -838,6 +838,22 @@ array is resynced at creation. From Linux version 3.0,
can be used with that command to avoid the automatic resync.
.TP
+.BR \-\-write-zeroes
+When creating an array, send write zeroes requests to all the block
+devices. This should zero the data area on all disks such that the
+initial sync is not necessary and, if successfull, will behave
+as if
+.B \-\-assume\-clean
+was specified.
+.IP
+This is intended for use with devices that have hardware offload for
+zeroing, but despite this zeroing can still take several minutes for
+large disks. Thus a message is printed before and after zeroing and
+each disk is zeroed in parallel with the others.
+.IP
+This is only meaningful with --create.
+
+.TP
.BR \-\-backup\-file=
This is needed when
.B \-\-grow
@@ -1370,7 +1386,7 @@ and
.B layout\-alternate
options are for RAID0 arrays with non-uniform devices size that were in
use before Linux 5.4. If the array was being used with Linux 3.13 or
-earlier, then to assemble the array on a new kernel,
+earlier, then to assemble the array on a new kernel,
.B \-\-update=layout\-original
must be given. If the array was created and used with a kernel from Linux 3.14 to
Linux 5.3, then
diff --git a/mdadm.c b/mdadm.c
index 57e8e6f..4685ad6 100644
--- a/mdadm.c
+++ b/mdadm.c
@@ -590,6 +590,10 @@ int main(int argc, char *argv[])
s.assume_clean = 1;
continue;
+ case O(CREATE, WriteZeroes):
+ s.write_zeroes = 1;
+ continue;
+
case O(GROW,'n'):
case O(CREATE,'n'):
case O(BUILD,'n'): /* number of raid disks */
@@ -1251,6 +1255,11 @@ int main(int argc, char *argv[])
}
}
+ if (s.write_zeroes && !s.assume_clean) {
+ pr_info("Disk zeroing requested, setting --assume-clean to skip resync\n");
+ s.assume_clean = 1;
+ }
+
if (!mode && devs_found) {
mode = MISC;
devmode = 'Q';
diff --git a/mdadm.h b/mdadm.h
index 1674ce1..b9127f9 100644
--- a/mdadm.h
+++ b/mdadm.h
@@ -275,6 +275,9 @@ static inline void __put_unaligned32(__u32 val, void *p)
#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
+#define KIB_TO_BYTES(x) ((x) << 10)
+#define SEC_TO_BYTES(x) ((x) << 9)
+
extern const char Name[];
struct md_bb_entry {
@@ -435,6 +438,7 @@ extern char Version[], Usage[], Help[], OptionHelp[],
*/
enum special_options {
AssumeClean = 300,
+ WriteZeroes,
BitmapChunk,
WriteBehind,
ReAdd,
@@ -640,6 +644,7 @@ struct shape {
int bitmap_chunk;
char *bitmap_file;
int assume_clean;
+ bool write_zeroes;
int write_behind;
unsigned long long size;
unsigned long long data_offset;
@@ -1854,6 +1859,8 @@ static inline int xasprintf(char **strp, const char *fmt, ...) {
#endif
#define cont_err(fmt ...) fprintf(stderr, " " fmt)
+#define pr_info(fmt, args...) printf("%s: "fmt, Name, ##args)
+
void *xmalloc(size_t len);
void *xrealloc(void *ptr, size_t len);
void *xcalloc(size_t num, size_t size);
diff --git a/tests/00raid5-zero b/tests/00raid5-zero
new file mode 100644
index 0000000..7d0f05a
--- /dev/null
+++ b/tests/00raid5-zero
@@ -0,0 +1,12 @@
+
+if mdadm -CfR $md0 -l 5 -n3 $dev0 $dev1 $dev2 --write-zeroes ; then
+ check nosync
+ echo check > /sys/block/md0/md/sync_action;
+ check wait
+elif grep "zeroing [^ ]* failed: Operation not supported" \
+ $targetdir/stderr; then
+ echo "write-zeros not supported, skipping"
+else
+ echo >&2 "ERROR: mdadm return failure without not supported message"
+ exit 1
+fi