>From 33ca5b780daacb43a7417998e9d6eee71f5f60b0 Mon Sep 17 00:00:00 2001
From: Adam Kwolek <adam.kwolek@xxxxxxxxx>
Date: Thu, 18 Feb 2010 11:08:15 +0100
Subject: [PATCH] OLCE: OLCE implementation
Changes to be committed:
modified: Grow.c
modified: managemon.c
modified: mdadm.h
modified: mdmon.h
modified: monitor.c
modified: super-intel.c
modified: util.c
Signed-off-by: Adam Kwolek <adam.kwolek@xxxxxxxxx>
---
Grow.c | 225 ++++++++++++++++++++++++++++++++-----
managemon.c | 142 +++++++++++++++++++++++-
mdadm.h | 1 +
mdmon.h | 7 +-
monitor.c | 141 +++++++++++++++++++++++-
super-intel.c | 346 ++++++++++++++++++++++++++++++++++++++++++++++++++++++---
util.c | 32 ++++++
7 files changed, 842 insertions(+), 52 deletions(-)
diff --git a/Grow.c b/Grow.c
index e6624d1..f332766 100644
--- a/Grow.c
+++ b/Grow.c
@@ -35,6 +35,13 @@
#define offsetof(t,f) ((size_t)&(((t*)0)->f))
#endif
+/**********************************************************
+ OLCE can use mre disks than there is configured curently
+ so we have to allocate more space that
+ there is required at the moment
+ ***********************************************************/
+#define OLCE_ADDITIONAL_SPACE 10
+
int Grow_Add_device(char *devname, int fd, char *newdev)
{
/* Add a device to an active array.
@@ -416,7 +423,8 @@ int bsb_csum(char *buf, int len)
static int child_grow(int afd, struct mdinfo *sra, unsigned long blocks,
int *fds, unsigned long long *offsets,
int disks, int chunk, int level, int layout, int data,
- int dests, int *destfd, unsigned long long *destoffsets);
+ int dests, int *destfd, unsigned long long *destoffsets,
+ int external);
static int child_shrink(int afd, struct mdinfo *sra, unsigned long blocks,
int *fds, unsigned long long *offsets,
int disks, int chunk, int level, int layout, int data,
@@ -694,7 +702,7 @@ int Grow_reshape(char *devname, int fd, int quiet, char *backup_file,
int devnum = fd2devnum(container_fd);
ping_monitor(devnum2devname(devnum));
close(container_fd);
- }
+ }
}
/* ======= set level =========== */
@@ -779,6 +787,7 @@ int Grow_reshape(char *devname, int fd, int quiet, char *backup_file,
rv = 1;/* not possible */
goto release;
}
+
err = sysfs_set_str(sra, NULL, "level", c);
if (err) {
st->ss->free_super(st);
@@ -800,19 +809,18 @@ int Grow_reshape(char *devname, int fd, int quiet, char *backup_file,
devname, c);
changed = 1;
- /* if raid0 was takeovered by any other personality start mdmon */
+ /* if raid0 was takeovered by any other personality start mdmon */
st = super_by_fd(fd);
- if (st->ss->external) {
- if ((level != 0) && (orig.level == 0))
+ if (st->ss->external) {
+ if ((level == 5) && (orig.level == 0))
{
int dn = devname2devnum(sra->text_version + 1);
if (!mdmon_running(dn)) {
start_mdmon(dn);
+ ping_monitor(devnum2devname(dn));
}
- ping_monitor(devnum2devname(dn));
}
}
-
}
}
@@ -1094,8 +1102,8 @@ int Grow_reshape(char *devname, int fd, int quiet, char *backup_file,
nrdisks = array.nr_disks + sra->array.spare_disks;
/* Now we need to open all these devices so we can read/write.
*/
- fdlist = malloc((1+nrdisks) * sizeof(int));
- offsets = malloc((1+nrdisks) * sizeof(offsets[0]));
+ fdlist = malloc((1+nrdisks+OLCE_ADDITIONAL_SPACE) * sizeof(int));
+ offsets = malloc((1+nrdisks+OLCE_ADDITIONAL_SPACE) * sizeof(offsets[0]));
if (!fdlist || !offsets) {
fprintf(stderr, Name ": malloc failed: grow aborted\n");
rv = 1;
@@ -1200,16 +1208,76 @@ int Grow_reshape(char *devname, int fd, int quiet, char *backup_file,
* sysfs.
*/
if (ochunk == nchunk && olayout == nlayout) {
+#define EXTERNAL_META_STATUS_NATIVE 0
+#define EXTERNAL_META_STATUS_OK EXTERNAL_META_STATUS_NATIVE + 1
+#define EXTERNAL_META_STATUS_ERROR EXTERNAL_META_STATUS_OK + 1
+ int externalMetaStatus = EXTERNAL_META_STATUS_NATIVE;
+
array.raid_disks = ndisks;
- if (ioctl(fd, SET_ARRAY_INFO, &array) != 0) {
- rv = 1;
- fprintf(stderr, Name ": Cannot set device shape for %s: %s\n",
- devname, strerror(errno));
- if (ndisks < odisks &&
- get_linux_version() < 2006030)
- fprintf(stderr, Name ": linux 2.6.30 or later required\n");
+ /* update array for external meta via user space */
+ if (st->ss->external) {
+ struct mdinfo info;
+ int delta_disks = 0;
+ int container_fd = -1;
+ int dn;
+ struct mdinfo *sra2 = NULL;
+
+ externalMetaStatus = EXTERNAL_META_STATUS_ERROR;
+ sra2 =sysfs_read(fd, 0, GET_VERSION);
+ if (sra2) {
+ dn = devname2devnum(sra2->text_version + 1);
+ container_fd = open_dev_excl(dn);
+ if (container_fd) {
+ int counter = 20;
+ int result = -1;
+ st->ss->load_super(st, container_fd, NULL);
+ st->ss->getinfo_super(st, &info);
+ close(container_fd);
+ delta_disks = ndisks - info.array.raid_disks;
+ info.array.raid_disks = ndisks;
+ strcpy(info.sys_name, sra2->sys_name);
+
+ /* loop has to be introduced
+ * for next volumes reshape can occures tha array is not ready
+ * so we have wait a while
+ */
+ while ((result != 0) || (counter >0)) {
+ result = sysfs_set_num(&info, NULL, "raid_disks", info.array.raid_disks);
+ counter --;
+ if (result!=0)
+ sleep(1);
+ }
- break;
+ if (result == 0) {
+ struct mdinfo * retInfo;
+ retInfo = st->ss->container_content(st);
+ if (retInfo != NULL)
+ externalMetaStatus = EXTERNAL_META_STATUS_OK;
+ }
+ }
+ sysfs_free(sra2);
+ sra2 = NULL;
+ }
+ }
+
+ if (externalMetaStatus == EXTERNAL_META_STATUS_ERROR) {
+ /* error */
+ fprintf(stderr, Name ": Cannot set device shape for %s: %s\n",
+ devname, strerror(errno));
+ rv = 1;
+ goto release;
+ }
+
+ if (externalMetaStatus == EXTERNAL_META_STATUS_NATIVE) {
+ if (ioctl(fd, SET_ARRAY_INFO, &array) != 0) {
+ rv = 1;
+ fprintf(stderr, Name ": Cannot set device shape for %s: %s\n",
+ devname, strerror(errno));
+ if (ndisks < odisks &&
+ get_linux_version() < 2006030)
+ fprintf(stderr, Name ": linux 2.6.30 or later required\n");
+ break;
+ }
}
} else {
/* set them all just in case some old 'new_*' value
@@ -1285,7 +1353,8 @@ int Grow_reshape(char *devname, int fd, int quiet, char *backup_file,
done = child_grow(fd, sra, stripes,
fdlist, offsets,
odisks, ochunk, array.level, olayout, odata,
- d - odisks, fdlist+odisks, offsets+odisks);
+ d - odisks, fdlist+odisks, offsets+odisks,
+ st->ss->external);
else if (odata > ndata)
done = child_shrink(fd, sra, stripes,
fdlist, offsets,
@@ -1316,7 +1385,9 @@ int Grow_reshape(char *devname, int fd, int quiet, char *backup_file,
fprintf(stderr, Name ": %s: could not set level to %s\n",
devname, c);
}
+
sysfs_free(sra);
+ sra = NULL;
exit(0);
case -1:
fprintf(stderr, Name ": Cannot run child to monitor reshape: %s\n",
@@ -1479,7 +1550,7 @@ int wait_backup(struct mdinfo *sra,
unsigned long long blocks, /* per device */
unsigned long long blocks2, /* per device - hack */
int dests, int *destfd, unsigned long long *destoffsets,
- int part)
+ int part, int external)
{
/* Wait for resync to pass the section that was backed up
* then erase the backup and allow IO
@@ -1487,12 +1558,105 @@ int wait_backup(struct mdinfo *sra,
int fd = sysfs_get_fd(sra, NULL, "sync_completed");
unsigned long long completed;
int i;
+ char buf[20];
+ int retVal = 0;
+ int reshapeActivated =0;
if (fd < 0)
return -1;
- sysfs_set_num(sra, NULL, "sync_max", offset + blocks + blocks2);
- if (offset == 0)
- sysfs_set_str(sra, NULL, "sync_action", "reshape");
+
+ if (external) {
+ if (sysfs_set_num(sra, NULL, "sync_max", 0) < 0)
+ retVal = -1;
+
+ if ((offset == 0) && (retVal == 0)) {
+ if (sysfs_set_str(sra, NULL, "sync_action", "reshape")>=0) {
+ /* wait for reconfiguration is beeing signalled from monitor */
+ if (sysfs_get_str(sra, NULL, "sync_completed", buf, 20) >0) {
+ long sync_compl = -1;
+ char *ep;
+ int counter = 0;
+
+ /* sync_complete == idle on error handling
+ * sync_complete == 0 on OK
+ */
+ sync_compl =-1;
+ while ((sync_compl != 0) && (retVal == 0)) {
+ /* got buffers, analyze
+ * sync completed - we are waiting for 0 only
+ */
+ if ((strlen (buf) !=0) &&
+ (strlen(buf)<=2)) {
+ errno = 0;
+ sync_compl = strtol(buf, &ep, 10);
+ } else {
+ /* this is not value we are interested in
+ * we are still waiting
+ */
+ if (strncmp(buf, "none", 4) == 0) {
+ /* reshape canceled */
+ retVal = -101;
+ }
+ }
+
+ /* now check if this action is not canceled */
+ if (sysfs_get_str(sra, NULL, "sync_action", buf, 20) >0) {
+ /* check if md wants still perform reshape */
+ if ((strncmp(buf, "reshape", strlen("reshape")) !=0) &&
+ (reshapeActivated)) {
+ retVal = -4;
+ } else
+ reshapeActivated = 1; /* I have to see reshape onec at least */
+ }
+
+ /* prepare for next loop */
+ if (retVal == 0) {
+ /* ok no error wait a while and read next buffer */
+ sleep(1);
+ sysfs_get_str(sra, NULL, "sync_completed", buf, 20);
+
+ /* manage timeout*/
+#define OLCE_TIMEOUT 60
+ counter ++;
+ if (counter > OLCE_TIMEOUT)
+ retVal = -200;
+ }
+
+ } /* while */
+ } else
+ retVal = -2;
+ } else
+ retVal =-3;
+ }
+ if (retVal == 0) {
+ sysfs_set_num(sra, NULL, "sync_max", offset + blocks + blocks2);
+ } else {
+ switch (retVal) {
+ case -1:
+ fprintf(stderr, Name ": Error: md finishes his job");
+ break;
+ case -200:
+ fprintf(stderr, Name ": Error: TIMEOUT (%i sec.). . .\n",OLCE_TIMEOUT);
+ case -2:
+ fprintf(stderr, Name ": Error: Cannot get synchronization with md\n");
+ break;
+ case -3:
+ fprintf(stderr, Name ": Error: md cannot start reshape\n");
+ break;
+ case -4:
+ fprintf(stderr, Name ": Error: Operation canceled\n");
+ break;
+ default:
+ fprintf(stderr, Name ": Error: General operation error (%i)\n", retVal);
+ }
+ return retVal;
+ }
+ } else {
+ sysfs_set_num(sra, NULL, "sync_max", offset + blocks + blocks2);
+ if (offset == 0)
+ sysfs_set_str(sra, NULL, "sync_action", "reshape");
+ }
+
do {
char action[20];
fd_set rfds;
@@ -1626,7 +1790,8 @@ static void validate(int afd, int bfd, unsigned long long offset)
static int child_grow(int afd, struct mdinfo *sra, unsigned long stripes,
int *fds, unsigned long long *offsets,
int disks, int chunk, int level, int layout, int data,
- int dests, int *destfd, unsigned long long *destoffsets)
+ int dests, int *destfd, unsigned long long *destoffsets,
+ int external)
{
char *buf;
int degraded = 0;
@@ -1641,7 +1806,7 @@ static int child_grow(int afd, struct mdinfo *sra, unsigned long stripes,
validate(afd, destfd[0], destoffsets[0]);
wait_backup(sra, 0, stripes * chunk / 512, stripes * chunk / 512,
dests, destfd, destoffsets,
- 0);
+ 0, external);
sysfs_set_num(sra, NULL, "suspend_lo", (stripes * chunk/512) * data);
if (buf) {
free(buf);
@@ -1669,7 +1834,7 @@ static int child_shrink(int afd, struct mdinfo *sra, unsigned long stripes,
sysfs_set_num(sra, NULL, "suspend_lo", 0);
sysfs_set_num(sra, NULL, "suspend_hi", 0);
rv = wait_backup(sra, 0, start - stripes * chunk/512, stripes * chunk/512,
- dests, destfd, destoffsets, 0);
+ dests, destfd, destoffsets, 0, 0);
if (rv < 0)
return 0;
grow_backup(sra, 0, stripes,
@@ -1679,7 +1844,7 @@ static int child_shrink(int afd, struct mdinfo *sra, unsigned long stripes,
0, °raded, buf);
validate(afd, destfd[0], destoffsets[0]);
wait_backup(sra, start, stripes*chunk/512, 0,
- dests, destfd, destoffsets, 0);
+ dests, destfd, destoffsets, 0, 0);
sysfs_set_num(sra, NULL, "suspend_lo", (stripes * chunk/512) * data);
if (buf) {
free(buf);
@@ -1730,7 +1895,7 @@ static int child_same_size(int afd, struct mdinfo *sra, unsigned long stripes,
if (wait_backup(sra, (start-stripes*2)*chunk/512,
stripes*chunk/512, 0,
dests, destfd, destoffsets,
- part) < 0)
+ part, 0) < 0)
return 0;
sysfs_set_num(sra, NULL, "suspend_lo", start*chunk/512 * data);
if (start + stripes > size)
@@ -1747,12 +1912,12 @@ static int child_same_size(int afd, struct mdinfo *sra, unsigned long stripes,
}
if (wait_backup(sra, (start-stripes*2) * chunk/512, stripes * chunk/512, 0,
dests, destfd, destoffsets,
- part) < 0)
+ part, 0) < 0)
return 0;
sysfs_set_num(sra, NULL, "suspend_lo", ((start-stripes)*chunk/512) * data);
wait_backup(sra, (start-stripes) * chunk/512, tailstripes * chunk/512, 0,
dests, destfd, destoffsets,
- 1-part);
+ 1-part, 0);
sysfs_set_num(sra, NULL, "suspend_lo", (size*chunk/512) * data);
sysfs_set_num(sra, NULL, "sync_speed_min", speed);
if (buf) {
@@ -1918,7 +2083,7 @@ int Grow_restart(struct supertype *st, struct mdinfo *info, int *fdlist, int cnt
goto second_fail; /* Cannot find leading superblock */
/* Now need the data offsets for all devices. */
- offsets = malloc(sizeof(*offsets)*info->array.raid_disks);
+ offsets = malloc(sizeof(*offsets)*(info->array.raid_disks +OLCE_ADDITIONAL_SPACE));
if (offsets == NULL) {
fprintf(stderr, Name ": Failed to get memory.\n");
continue;
diff --git a/managemon.c b/managemon.c
index b596c77..f39201a 100644
--- a/managemon.c
+++ b/managemon.c
@@ -123,6 +123,8 @@ static void close_aa(struct active_array *aa)
aa->info.state_fd = -1;
close(aa->resync_start_fd);
aa->resync_start_fd = -1;
+ close(aa->reshape_position_fd);
+ aa->reshape_position_fd = -1;
}
static void free_aa(struct active_array *aa)
@@ -383,6 +385,33 @@ static void manage_container(struct mdstat_ent *mdstat,
}
}
+
+static int reshape_add_devices(struct active_array *a, struct mdinfo *newdev, int delta_disks)
+{
+
+ int retVal = 0;
+ struct mdinfo *newd = NULL;
+
+ if (a && (delta_disks>0) && (newdev)) {
+ newdev->disk.state = (1<<MD_DISK_SYNC) | (1<<MD_DISK_ACTIVE);
+ sysfs_add_disk(&a->info, newdev, 0);
+ newd = malloc(sizeof(*newd));
+ if (newd) {
+ *newd = *newdev;
+ newd->next = a->info.devs;
+ a->info.devs = newd;
+ newd->state_fd = sysfs_open(a->devnum, newd->sys_name, "state");
+ newd->prev_state = read_dev_state(newd->state_fd);
+ newd->curr_state = DS_INSYNC;
+ newd->disk.state = (1<<MD_DISK_SYNC) | (1<<MD_DISK_ACTIVE);
+ newd->next_state = 0;
+ }
+ retVal ++;
+ }
+ return retVal;
+}
+
+
static void manage_member(struct mdstat_ent *mdstat,
struct active_array *a)
{
@@ -415,6 +444,107 @@ static void manage_member(struct mdstat_ent *mdstat,
}
}
+ if (a->curr_action == reshape) {
+#define RAID_DISKS_STR_LEN 50
+#define SYNC_MAX_STR_LEN 30
+ char raid_disks_str[RAID_DISKS_STR_LEN];
+ char sync_max_str[SYNC_MAX_STR_LEN];
+
+ if (sysfs_get_str(&(a->info), NULL,"sync_max", sync_max_str, SYNC_MAX_STR_LEN) >0) {
+ if ((strncmp(sync_max_str, "0", 1) == 0) && ( a->reshape_delta_disks > 0 )) {
+ /* this is reshape /hold on/ phase
+ * we ahve add device before any action takes place
+ * to allow manage new device also along entire managment procedure
+ *
+ * 1. read sysfs, if new device for teshape has to be added
+ * 2. check reshape condition if new device has to be added
+ * 3. if so add device to md and update meta
+ * 4. trigger mdadm by setting sync_compl=0 in sysfs
+ */
+ int notificationSent = 0;
+
+ if (sysfs_get_str(&(a->info), NULL,"raid_disks", raid_disks_str, RAID_DISKS_STR_LEN) >0) {
+ char *spaceLocation=NULL;
+ /* get it in format: new_raid_disks (old_raid_disks) */
+ spaceLocation = strchr (raid_disks_str, ' ');
+ if (spaceLocation) {
+ int old_raid_disks = 0;
+ int new_raid_disks = 0;
+ int delta_disks = 0;
+ char *endPtr;
+
+ *spaceLocation = '\0';
+ spaceLocation +=2;
+ *(spaceLocation + strlen(spaceLocation) -1) = '\0';
+ old_raid_disks = strtol(spaceLocation, &endPtr, 10);
+ new_raid_disks = strtol(raid_disks_str, &endPtr, 10);
+
+ if ((old_raid_disks == LONG_MIN) || (old_raid_disks == LONG_MAX))
+ old_raid_disks = 0;
+ if ((new_raid_disks == LONG_MIN) || (new_raid_disks == LONG_MAX))
+ new_raid_disks = 0;
+
+ delta_disks = new_raid_disks - old_raid_disks;
+
+ if ((delta_disks>0) && (delta_disks == a->reshape_delta_disks) && (a->reshape_delta_disks) &&
+ (new_raid_disks > 0) && (old_raid_disks > 0)) {
+ /* there is something to do */
+ struct metadata_update *updates = NULL;
+ struct mdinfo *newdev = NULL;
+ int somethingAdded = 0;
+ int disksToAdd = delta_disks;
+
+ /* add devices */
+ somethingAdded = 0;
+ while (disksToAdd) {
+ newdev = a->container->ss->activate_spare(a, &updates);
+ if (newdev) {
+ somethingAdded += reshape_add_devices(a, newdev, delta_disks);
+ /* prepare buffer to add next disk */
+ if (a->container->ss->prepare_update)
+ a->container->ss->prepare_update(a->container, updates);
+ } else
+ dprintf("OLCE: Error: Device not added to configuration\n");
+ disksToAdd--;
+ /* size has matter for allocated memory for every upodate */
+ a->reshape_delta_disks--;
+ }
+
+ /* newdev check is not needed here, we have check for somethingAdded */
+ if ((somethingAdded == delta_disks) && (somethingAdded > 0) && (updates)) {
+ /* reverse updates order */
+ struct metadata_update *mu = NULL;
+ struct metadata_update *prev = NULL;
+
+ while (updates) {
+ mu = updates;
+ updates = updates->next;
+ mu->next = prev;
+ prev = mu;
+ }
+ if (mu) updates = mu;
+
+ /* go with update */
+ queue_metadata_update(updates);
+ a->check_degraded = 0;
+
+ /* signal_OK */
+ sysfs_set_str(&(a->info), NULL, "sync_completed", "0");
+ notificationSent = 1;
+ } else dprintf("OLCE: Problem in adding devices. OLCE is broken.\n");
+ }
+ }
+ }
+
+ if (notificationSent == 0) {
+ sysfs_set_str(&(a->info), NULL, "sync_action", "idle");
+ dprintf("OLCE: Set idle state to sync_action. OLCE aborted.\n");
+ } else dprintf("OLCE: Set 0 to sync_completed. OLCE is OK.\n");
+ }
+ } else sysfs_set_str(&(a->info), NULL, "sync_completed", "0");
+ }
+ a->reshape_delta_disks = 0; /* do not allow for reentry */
+
if (a->check_degraded) {
struct metadata_update *updates = NULL;
struct mdinfo *newdev = NULL;
@@ -446,7 +576,7 @@ static void manage_member(struct mdstat_ent *mdstat,
if (sysfs_add_disk(&newa->info, d, 0) < 0) {
free(newd);
continue;
- }
+ }
*newd = *d;
newd->next = newa->info.devs;
newa->info.devs = newd;
@@ -465,9 +595,10 @@ static void manage_member(struct mdstat_ent *mdstat,
d = newdev->next;
free(newdev);
newdev = d;
- }
+ }
free_updates(&updates);
}
+
}
static int aa_ready(struct active_array *aa)
@@ -482,7 +613,10 @@ static int aa_ready(struct active_array *aa)
if (aa->info.state_fd < 0)
return 0;
- if (level > 0 && (aa->action_fd < 0 || aa->resync_start_fd < 0))
+ if (level > 0 &&
+ (aa->action_fd < 0 ||
+ aa->resync_start_fd < 0 ||
+ aa->reshape_position_fd < 0))
return 0;
if (!aa->container)
@@ -586,8 +720,10 @@ static void manage_new(struct mdstat_ent *mdstat,
new->resync_start_fd = sysfs_open(new->devnum, NULL, "resync_start");
new->metadata_fd = sysfs_open(new->devnum, NULL, "metadata_version");
new->level_fd = sysfs_open(new->devnum, NULL, "level");
+ new->reshape_position_fd = sysfs_open(new->devnum, NULL, "reshape_position");
new->takeover = none;
new->prev_level = -1;
+
dprintf("%s: inst: %d action: %d state: %d\n", __func__, atoi(inst),
new->action_fd, new->info.state_fd);
diff --git a/mdadm.h b/mdadm.h
index bd722a0..e05a58e 100644
--- a/mdadm.h
+++ b/mdadm.h
@@ -835,6 +835,7 @@ extern char *conf_word(FILE *file, int allow_key);
extern int conf_name_is_free(char *name);
extern int devname_matches(char *name, char *match);
extern struct mddev_ident_s *conf_match(struct mdinfo *info, struct supertype *st);
+extern int find_array_minor(char *text_version, int external, int *minor);
extern void free_line(char *line);
extern int match_oneof(char *devices, char *devname);
diff --git a/mdmon.h b/mdmon.h
index 5c2f795..aee68bc 100644
--- a/mdmon.h
+++ b/mdmon.h
@@ -30,6 +30,7 @@ struct active_array {
struct supertype *container;
struct active_array *next, *replaces;
+ int reshape_position_fd;
int action_fd;
int resync_start_fd;
int metadata_fd; /* for monitoring rw/ro status */
@@ -37,12 +38,16 @@ struct active_array {
enum array_state prev_state, curr_state, next_state;
enum sync_action prev_action, curr_action, next_action;
+ unsigned long long reshape_position;
int check_degraded; /* flag set by mon, read by manage */
-
+ int reshape_delta_disks; /* number of delta_disks discovered by monitor, used as flag for managemon, and for adding spares */
+ unsigned long long reshape_new_size; /* size that has to be set during reshape filalize */
+
int devnum;
int prev_level, curr_level;
enum takeover_stage takeover;
+ unsigned long long resync_start;
};
/*
diff --git a/monitor.c b/monitor.c
index c4f4015..3343aa3 100644
--- a/monitor.c
+++ b/monitor.c
@@ -114,6 +114,28 @@ static int read_level(int fd)
int level = map_name(pers, buf);
return level;
}
+static unsigned long long read_reshape_position( int fd)
+{
+ char buf[40];
+ int n = read_attr(buf, 40, fd);
+ unsigned long long retVal = 0;
+
+ if (n <= 0) {
+ /* error - do nothing */
+ } else {
+ /* check if reshape position i s numeric */
+ char *ep;
+
+ retVal = strtoull(buf, &ep, 10);
+ if (ep == buf ||
+ ((*ep != 0) && (*ep != '\n') && (*ep != ' '))) {
+ /* error so we have to wait more */
+ retVal =0;
+ }
+ }
+
+ return retVal;
+}
int read_dev_state(int fd)
{
@@ -208,21 +230,35 @@ static void signal_manager(void)
*
*/
+extern void queue_metadata_update(struct metadata_update *mu);
+extern struct active_array *duplicate_aa(struct active_array *aa);
+extern void replace_array(struct supertype *container,
+ struct active_array *old,
+ struct active_array *new);
+
static int read_and_act(struct active_array *a)
{
int check_degraded = 0;
int deactivate = 0;
struct mdinfo *mdi;
int dirty = 0;
+ unsigned long long reshape_position = 0;
a->next_state = bad_word;
a->next_action = bad_action;
a->curr_state = read_state(a->info.state_fd);
- if (a->action_fd > 0)
- a->curr_action = read_action(a->action_fd);
- a->curr_level = read_level(a->level_fd);
+ if (a->action_fd > 0)
+ a->curr_action = read_action(a->action_fd);
+ a->curr_level = read_level(a->level_fd);
a->info.resync_start = read_resync_start(a->resync_start_fd);
+ if (a->prev_level < 0) {
+ /* get level from meta */
+ a->prev_level = a->container->ss->takeover( a, NULL);
+ }
+
+ reshape_position = read_reshape_position(a->reshape_position_fd);
+
for (mdi = a->info.devs; mdi ; mdi = mdi->next) {
mdi->next_state = 0;
if (mdi->state_fd >= 0) {
@@ -327,6 +363,103 @@ static int read_and_act(struct active_array *a)
}
}
+#define OLCE_STR_LEN 50
+#define RAID_DISKS_STR_LEN 50
+ if (!deactivate) {
+ /* monitor reshape position (update meta)
+ * Start reshape
+ */
+ if ((a->curr_action == reshape)) {
+ int sent_to_manager = 0;
+ switch (a->prev_action) {
+ case reshape : /* continue reshape */
+ {
+ if (a->reshape_position != reshape_position) {
+ /* uptdate meta
+ * where update reshape position ? propably in manager to identify request
+ */
+
+ /* a->reshape_position = reshape_position */
+ sysfs_set_str(&(a->info), NULL,"sync_completed","0");
+ /* reshape checkpointing */
+ /* send_to_manager = 1; */
+ }
+ }
+ break;
+
+ default:
+ {
+ char raid_disks_str[ RAID_DISKS_STR_LEN ];
+ /* we ahve add device before any action takes place
+ * to allow manage new device also along entire managment procedure
+ *
+ * 1. read sysfs, if new device for teshape has to be added
+ * 2. check reshape condition if new device has to be added
+ * 3. if so add device to md and update meta
+ * 4. trigger mdadm by setting sync_compl=0 in sysfs
+ */
+ if (sysfs_get_str(&(a->info), NULL, "raid_disks", raid_disks_str, RAID_DISKS_STR_LEN) >0) {
+ char *spaceLocation = NULL;
+ /* get it in format: new_raid_disks (old_raid_disks) */
+ spaceLocation = strchr (raid_disks_str, ' ');
+ if (spaceLocation) {
+ int old_raid_disks = 0;
+ int new_raid_disks = 0;
+ int delta_disks = 0;
+ char *endPtr;
+
+ *spaceLocation = '\0';
+ spaceLocation += 2;
+ *(spaceLocation + strlen(spaceLocation) -1) = '\0';
+
+ old_raid_disks = strtol(spaceLocation, &endPtr, 10);
+ new_raid_disks = strtol(raid_disks_str, &endPtr, 10);
+
+ if ((old_raid_disks == LONG_MIN) || (old_raid_disks == LONG_MAX))
+ old_raid_disks = 0;
+ if ((new_raid_disks == LONG_MIN) || (new_raid_disks == LONG_MAX))
+ new_raid_disks = 0;
+
+ delta_disks = new_raid_disks - old_raid_disks;
+
+ if ((delta_disks > 0) && /* grow only */
+ (new_raid_disks >0) && (old_raid_disks >0)) {
+ a->reshape_delta_disks = delta_disks;
+ a->reshape_position = 0;
+ sent_to_manager = 1;
+ } else sysfs_set_str(&(a->info), NULL,"sync_completed","0");
+ }
+ }
+ }
+ break;
+ } /* switch */
+
+ if (sent_to_manager == 1) {
+ /* Mmanager doesnt have to be invoked for this reshape
+ * send signal to mdadm myself
+ */
+ signal_manager();
+ }
+ }
+
+ /* finalize reshape */
+ if ((a->curr_action != reshape) &&
+ (a->prev_action == reshape)) {
+ /* array size has to be changed */
+ if (a->reshape_new_size > 0) {
+ a->info.array.size = a->reshape_new_size;
+ a->reshape_new_size = 0;
+ sysfs_set_num(&(a->info), NULL, "array_size", a->info.array.size);
+ }
+ /* A reshape has finished. Some disks may be in sync now. */
+ for (mdi = a->info.devs ; mdi ; mdi = mdi->next) {
+ a->container->ss->set_disk(a, mdi->disk.raid_disk,
+ mdi->curr_state);
+ }
+ }
+ }
+
+
/* Check for failures and if found:
* 1/ Record the failure in the metadata and unblock the device.
* FIXME update the kernel to stop notifying on failed drives when
@@ -510,6 +643,8 @@ static int wait_and_act(struct supertype *container, int nowait)
add_fd(&rfds, &maxfd, a->level_fd);
if (a->action_fd > 0)
add_fd(&rfds, &maxfd, a->action_fd);
+ add_fd(&rfds, &maxfd, a->reshape_position_fd);
+
for (mdi = a->info.devs ; mdi ; mdi = mdi->next)
add_fd(&rfds, &maxfd, mdi->state_fd);
diff --git a/super-intel.c b/super-intel.c
index bd10952..afc5d0c 100644
--- a/super-intel.c
+++ b/super-intel.c
@@ -27,6 +27,7 @@
#include <ctype.h>
#include <dirent.h>
+
/* MPB == Metadata Parameter Block */
#define MPB_SIGNATURE "Intel Raid ISM Cfg Sig. "
#define MPB_SIG_LEN (strlen(MPB_SIGNATURE))
@@ -194,6 +195,10 @@ struct bbm_log {
static char *map_state_str[] = { "normal", "uninitialized", "degraded", "failed" };
#endif
+
+
+
+
static __u8 migr_type(struct imsm_dev *dev)
{
if (dev->vol.migr_type == MIGR_VERIFY &&
@@ -285,6 +290,7 @@ enum imsm_update_type {
update_create_array,
update_add_disk,
update_takeover,
+ update_add_spare,
};
struct imsm_update_activate_spare {
@@ -292,6 +298,8 @@ struct imsm_update_activate_spare {
struct dl *dl;
int slot;
int array;
+ int reshape_delta_disks;
+ int devnum;
struct imsm_update_activate_spare *next;
};
@@ -324,6 +332,7 @@ struct imsm_update_takeover {
int sl_changed;
};
+
static struct supertype *match_metadata_desc_imsm(char *arg)
{
struct supertype *st;
@@ -405,7 +414,6 @@ struct imsm_map *get_imsm_map(struct imsm_dev *dev, int second_map)
return NULL;
else if (second_map) {
void *ptr = map;
-
return ptr + sizeof_imsm_map(map);
} else
return map;
@@ -490,6 +498,7 @@ static __u32 get_imsm_ord_tbl_ent(struct imsm_dev *dev, int slot)
}
#define ord_to_idx(ord) (((ord) << 8) >> 8)
+#define get_ord_flags(ord) (((ord) >> 8) << 8)
static __u32 get_imsm_disk_idx(struct imsm_dev *dev, int slot)
{
__u32 ord = get_imsm_ord_tbl_ent(dev, slot);
@@ -507,6 +516,7 @@ static int get_imsm_disk_slot(struct imsm_map *map, int idx)
int slot;
__u32 ord;
+
for (slot = 0; slot < map->num_members; slot++) {
ord = __le32_to_cpu(map->disk_ord_tbl[slot]);
if (ord_to_idx(ord) == idx)
@@ -1443,6 +1453,7 @@ static __u64 blocks_per_migr_unit(struct imsm_dev *dev)
}
}
+
static int imsm_level_to_layout(int level)
{
switch (level) {
@@ -1751,6 +1762,7 @@ struct imsm_dev *reallocate_imsm_dev(struct intel_super *super,
int array_index,
int map0_num_members,
int map1_num_members)
+
{
struct imsm_dev *newdev = NULL;
struct imsm_dev *retVal = NULL;
@@ -1778,8 +1790,9 @@ struct imsm_dev *reallocate_imsm_dev(struct intel_super *super,
dv->dev = newdev;
retVal = newdev;
break;
- }
+ }
}
+
return retVal;
}
@@ -4030,7 +4043,6 @@ static int validate_geometry_imsm_volume(struct supertype *st, int level,
/* We must have the container info already read in. */
if (!super)
return 0;
-
if (!validate_geometry_imsm_orom(super, level, layout, raiddisks, chunk, verbose))
return 0;
@@ -4409,8 +4421,7 @@ static struct mdinfo *container_content_imsm(struct supertype *st)
* unsupported migration
*/
if (dev->vol.migr_state &&
- (migr_type(dev) == MIGR_GEN_MIGR ||
- migr_type(dev) == MIGR_STATE_CHANGE)) {
+ (migr_type(dev) == MIGR_STATE_CHANGE)) {
fprintf(stderr, Name ": cannot assemble volume '%.16s':"
" unsupported migration in progress\n",
dev->volume);
@@ -4575,10 +4586,17 @@ static __u8 imsm_check_degraded(struct intel_super *super, struct imsm_dev *dev,
return IMSM_T_STATE_DEGRADED;
}
case 5:
- if (failed < 2)
+ switch(failed)
+ {
+ case 0:
+ return IMSM_T_STATE_NORMAL;
+ break;
+ case 1:
return IMSM_T_STATE_DEGRADED;
- else
+ break;
+ default:
return IMSM_T_STATE_FAILED;
+ }
break;
default:
break;
@@ -4807,7 +4825,7 @@ static void imsm_set_disk(struct active_array *a, int n, int state)
if ((dev == NULL) || (map == NULL))
return;
- if (n > map->num_members)
+ if (n >= map->num_members)
fprintf(stderr, "imsm: set_disk %d out of range 0..%d\n",
n, map->num_members - 1);
@@ -5073,7 +5091,7 @@ static int imsm_takeover(struct active_array *a,
fprintf(stderr, "%s: failed to allocate update buffer\n",
__func__);
return -1;
- }
+ }
/* initialize update struct */
mu->space = NULL;
@@ -5190,8 +5208,10 @@ static struct mdinfo *imsm_activate_spare(struct active_array *a,
dprintf("imsm: activate spare: inst=%d failed=%d (%d) level=%d\n",
inst, failed, a->info.array.raid_disks, a->info.array.level);
- if (imsm_check_degraded(super, dev, failed) != IMSM_T_STATE_DEGRADED)
- return NULL;
+ if (imsm_check_degraded(super, dev, failed) != IMSM_T_STATE_DEGRADED) {
+ if (failed == 0)
+ return NULL;
+ }
/* For each slot, if it is not working, find a spare */
for (i = 0; i < a->info.array.raid_disks; i++) {
@@ -5209,7 +5229,8 @@ static struct mdinfo *imsm_activate_spare(struct active_array *a,
* partially assimilated, finally try to activate a new
* spare.
*/
- dl = imsm_readd(super, i, a);
+ if (d) /* previously there was present member */
+ dl = imsm_readd(super, i, a);
if (!dl)
dl = imsm_add_spare(super, i, a, 0);
if (!dl)
@@ -5290,6 +5311,16 @@ static struct mdinfo *imsm_activate_spare(struct active_array *a,
di->devs = NULL;
u->slot = di->disk.raid_disk;
u->array = inst;
+
+ a->reshape_new_size = 0;
+ u->reshape_delta_disks = a->reshape_delta_disks;
+ if (u->reshape_delta_disks) {
+ u->type = update_add_spare;
+ u->devnum = a->devnum;
+ }
+ else
+ u->devnum = -1;
+
u->next = u + 1;
u++;
}
@@ -5342,6 +5373,25 @@ static int find_free_slot(struct mdinfo *info, int prev_slot)
return slot;
}
+static void map_dump(char *info, struct imsm_dev *dev)
+{
+#ifdef DEBUG
+ int i;
+ struct imsm_map *map = get_imsm_map(dev, 0);
+
+ dprintf(info);
+ dprintf("\n");
+ dprintf("MAP DUMP ============================================ START\n");
+ dprintf("\tMap address: %p\n", map);
+ dprintf("\tMap count : %i\n", map->num_members);
+ for(i=0; i<map->num_members; i++)
+ {
+ dprintf("\t\tDisk %i => %i (ord = %i)\n",i, get_imsm_disk_idx(dev, i), get_imsm_ord_tbl_ent(dev, i) );
+ }
+ dprintf("MAP DUMP ============================================ END\n");
+#endif
+}
+
static void imsm_process_update(struct supertype *st,
struct metadata_update *update)
{
@@ -5390,7 +5440,7 @@ static void imsm_process_update(struct supertype *st,
struct dl *dl = NULL;
int slot=-1, i;
int num_disks = 0;
- struct imsm_map *migr_map = get_imsm_map(dev, 1);
+ struct imsm_map *migr_map = get_imsm_map(dev, 1);
/* count HDDs */
for (dl = super->disks; dl; dl = dl->next) {
@@ -5528,10 +5578,265 @@ static void imsm_process_update(struct supertype *st,
map->raid_level = u->new_level;
super->updates_pending++;
array->takeover = finished;
-
+
imsm_update_version_info(super);
- break;
+ map_dump("TAKEOVER: END Map DUMP", dev);
}
+ break;
+ case update_add_spare:
+ {
+ /* every update is valid for adding single disk only
+ * if you want to add mmore disks, post update list
+ */
+ struct imsm_dev *newdev = NULL;
+ struct imsm_update_activate_spare *u = (void *) update->buf;
+ struct imsm_dev *dev = NULL;
+ struct imsm_map *map = NULL;
+ struct imsm_map *migr_map = NULL;
+ struct imsm_map *migr_map_backup = NULL;
+ int migr_map_size = 0;
+ struct dl *dl = NULL;
+ struct dl *dl_missing = NULL;
+ struct dl *dl2 = NULL;
+ int index = -1;
+ __u8 to_state;
+ int hdd_count = 0;
+ int hdd_missing_count = 0;
+ struct active_array *a = NULL;
+ int slot;
+ int slot_missing;
+ int missing_ord = -1;
+ int missing_index = -1;
+ int update_add_spare_status = -1;
+ int migr_state = -1;
+
+ /* verify input */
+ if (u == NULL) {
+ fprintf(stderr, "error: IMSM: corrupted update is passed\n");
+ goto update_add_spare_exit;
+ }
+ slot = u->slot;
+ dprintf("OLCE: USED Slot = %i\n",slot);
+
+ dev = get_imsm_dev(super, u->array);
+ if (dev == NULL) {
+ fprintf(stderr, "error: IMSM: Cannot find requested device\n");
+ goto update_add_spare_exit;
+ }
+ /* use first map as a base */
+ migr_state = dev->vol.migr_state;
+ dev->vol.migr_state = 0;
+
+ map = get_imsm_map(dev, 0);
+ if (map == NULL) {
+ fprintf(stderr, "error: IMSM: Invalid map for requested device\n");
+ goto update_add_spare_exit;
+ }
+
+ /* count HDDs */
+ for (dl = super->disks; dl; dl = dl->next) {
+ if (dl->index >= 0)
+ hdd_count ++;
+ }
+
+ /* count missing disks */
+ for (dl = super->missing; dl; dl = dl->next) {
+ hdd_missing_count ++;
+ }
+
+ /* number of disks to add during one update
+ * to add more drives updates will go in series
+ */
+ u->reshape_delta_disks = 1;
+
+ newdev = reallocate_imsm_dev(super, u->array, map->num_members + u->reshape_delta_disks, map->num_members + u->reshape_delta_disks);
+ /* verify if buffer is used */
+ if (newdev == NULL) {
+ /* new buffer not set */
+ fprintf(stderr, "error: imsm meta update not possible due to not founding device\n");
+ goto update_add_spare_exit;
+ }
+ /* get new pointers */
+ dev = get_imsm_dev(super, u->array);
+ map = get_imsm_map(dev, 0);
+
+ /* get/create migration map and backup it */
+ migr_map = get_imsm_map(dev, 1);
+
+ if (migr_map == NULL) {
+ /* set migration/ no migration in progress
+ * temporary for migrate call only use MIGR_REBUILD
+ * later migration will be set to MIGR_GEN_MIGR
+ * using migr_state variable
+ */
+ dev->vol.migr_state = MIGR_REBUILD;
+ to_state = imsm_check_degraded(super, dev, 0);
+ migrate(dev, to_state, dev->vol.migr_state);
+ migr_map = get_imsm_map(dev, 1);
+ migr_state = MIGR_GEN_MIGR;
+ dev->vol.migr_state = 0;
+ }
+
+ map_dump("OLCE: map dump (before changes)", dev);
+
+ /* backup migration map to shift it in memory */
+ if (migr_map) {
+ migr_map_size = sizeof_imsm_map(migr_map);
+ if (migr_map_size > 0) {
+ migr_map_backup = calloc(1, migr_map_size);
+ if (migr_map_backup)
+ memcpy(migr_map_backup, migr_map, migr_map_size);
+ }
+ }
+
+ if (migr_map_backup == NULL) {
+ fprintf(stderr, "error: imsm_add_spare (ADD_TO_MAP) "
+ "cannot maintain second map in metadata record\n");
+ goto update_add_spare_exit;
+ }
+
+ /* find "my" missing hdd */
+ for (dl = super->missing; dl; dl = dl->next) {
+ int hdd_index;
+ int j;
+
+ for (j=0; j < map->num_members ;j++) {
+ hdd_index = get_imsm_disk_idx(dev, j);
+ /* check if disk serial is equal to TAKEOVER_MISSING_DISK */
+ if ((hdd_index == dl->index) &&
+ (strncmp((char*)dl->disk.serial,
+ TAKEOVER_MISSING_DISK,
+ strlen(TAKEOVER_MISSING_DISK)) == 0)) {
+ dl_missing = dl;
+ slot_missing = j;
+ missing_index = hdd_index;
+ missing_ord = get_imsm_ord_tbl_ent(dev, j);
+ break;
+ }
+ }
+ }
+
+ if (hdd_missing_count > 1) {
+ /* OLCE is not supported for more than 1 missing hdd */
+ fprintf(stderr, "error: imsm_add_spare found %i missing disks.\n",
+ hdd_missing_count);
+ goto update_add_spare_exit;
+ }
+
+ /* find my hdd */
+ for (dl = super->disks; dl; dl = dl->next) {
+ if (dl == u->dl)
+ break;
+ }
+ if (!dl) {
+ fprintf(stderr, "error: imsm_add_spare passed "
+ "an unknown disk (index: %d)\n",
+ u->dl->index);
+ goto update_add_spare_exit;
+ }
+
+ if (dl->index == -1) {
+ /* find first free index */
+ for (dl2 = super->disks; dl2; dl2 = dl2->next) {
+ if (index <= dl2->index)
+ index = dl2->index+1;
+ }
+
+ /* configure additional disk */
+ dl->index = index;
+ dl->disk.status |= CONFIGURED_DISK;
+ dl->disk.status &= ~SPARE_DISK;
+ } else
+ index = dl->index;
+
+ /* maintain missing disk (for using with takeover) */
+ if (missing_index > -1) {
+ /* there is something in missing list */
+ int new_missing_index;
+ new_missing_index = index + 1;
+ slot_missing++;
+ if (new_missing_index > missing_index) {
+ /* we need to shift missing index */
+ dl_missing->index = new_missing_index;
+ missing_index = new_missing_index;
+ /* get flags from old ord */
+ missing_ord = get_ord_flags(missing_ord);
+ /* add new index */
+ missing_ord |= missing_index;
+ }
+ }
+ /* map update
+ * 1'st map
+ */
+ map->num_members += u->reshape_delta_disks;
+ set_imsm_ord_tbl_ent(map, slot, dl->index);
+ /* 2'nd map */
+ if (migr_state != -1) dev->vol.migr_state = migr_state;
+ migr_state = -1;
+ /* get new location of migration map */
+ migr_map = get_imsm_map(dev, 1);
+ if ((migr_map != NULL) && (migr_map_backup != NULL)) {
+ /* restore second map */
+ memcpy(migr_map, migr_map_backup, migr_map_size);
+ if (missing_ord != -1) {
+ /* missing drive ord number has to change */
+ set_imsm_ord_tbl_ent(migr_map, migr_map->num_members-1, missing_ord);
+ set_imsm_ord_tbl_ent(map, map->num_members-1, missing_ord);
+ /* update failed_disk_num in maps */
+ map->failed_disk_num = missing_index;
+ migr_map->failed_disk_num = missing_index;
+ }
+ migr_map->map_state = IMSM_T_STATE_DEGRADED;
+ }
+
+ /* manage size, if active array is known to in line with md
+ * access active array (Initialize pointer to the proper active array)
+ */
+ for (a = st->arrays; a; a = a->next) {
+ if (a->devnum == u->devnum)
+ break;
+ }
+
+ if (a) {
+ unsigned long long array_blocks;
+ unsigned long long array_blocks_current;
+ int used_disks = 0;
+ /* count used disks for data */
+ switch (map->raid_level) {
+ case 0:
+ used_disks = map->num_members;
+ break;
+ case 5:
+ used_disks = map->num_members - 1;
+ break;
+ default:
+ fprintf(stderr, "error : imsm_add_spare cannot perform OLCE on array other than Raid0 or Raid5.\n");
+ goto update_add_spare_exit;
+ }
+ array_blocks = map->blocks_per_member * used_disks;
+ /* round array size down to closest MB */
+ array_blocks = (array_blocks >> SECT_PER_MB_SHIFT) << SECT_PER_MB_SHIFT;
+ array_blocks_current = (((unsigned long long)dev->size_high) <<32) + dev->size_low;
+
+ if (array_blocks_current < array_blocks) { /* grow only */
+ dev->size_low = __cpu_to_le32((__u32) array_blocks);
+ dev->size_high = __cpu_to_le32((__u32) (array_blocks >> 32));
+ a->reshape_new_size = array_blocks/2;
+ }
+ }
+ super->updates_pending++;
+ update_add_spare_status = 1; /* operatio succed - no exit with error */
+
+update_add_spare_exit:
+
+ if (migr_state != -1) {
+ map_dump("OLCE: Final dump (before changes)", dev);
+ dev->vol.migr_state = migr_state;
+ }
+ if (migr_map_backup) free(migr_map_backup);
+ if (update_add_spare_status < 0) return;
+ }
+ break;
case update_activate_spare: {
struct imsm_update_activate_spare *u = (void *) update->buf;
struct imsm_dev *dev = get_imsm_dev(super, u->array);
@@ -5817,7 +6122,18 @@ static void imsm_prepare_update(struct supertype *st,
update->space = NULL;
break;
}
+ case update_add_spare: {
+ struct imsm_update_activate_spare *u = (void *) update->buf;
+ struct imsm_dev *dev = get_imsm_dev(super, u->array);
+ /* get current size */
+ if (u->reshape_delta_disks > 0) {
+ len = sizeof_imsm_dev(dev, 1) + u->reshape_delta_disks*sizeof(struct imsm_disk);
+ }
+ update->space = NULL;
+ break;
+ }
+
case update_create_array: {
struct imsm_update_create_array *u = (void *) update->buf;
struct intel_dev *dv;
diff --git a/util.c b/util.c
index ea74efe..36e1c4d 100644
--- a/util.c
+++ b/util.c
@@ -1665,3 +1665,35 @@ void append_metadata_update(struct supertype *st, void *buf, int len)
unsigned int __invalid_size_argument_for_IOC = 0;
#endif
+int find_array_minor(char *text_version, int external, int *minor)
+{
+ int i;
+ char path[PATH_MAX];
+ struct stat s;
+
+ if (minor == NULL)
+ return -2;
+
+ for (i = 127; i >= 0; i--) {
+ char buf[1024];
+
+ snprintf(path, PATH_MAX, "/sys/block/md%d/md/", i);
+ if (stat(path, &s) != -1) {
+ strcat(path, "metadata_version");
+ if (load_sys(path, buf))
+ continue;
+ if (external) {
+ char *version = strchr(buf, ':');
+ if (version && strcmp(version + 1, text_version))
+ continue;
+ } else {
+ if (strcmp(buf, text_version))
+ continue;
+ }
+ *minor = i;
+ return 0;
+ }
+ }
+ return -1;
+}
+
--
1.6.0.2
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