imsm: use saved fds during migration
IMSM super keeps open descriptors in super->disks structure, they are reliable and should be chosen if possible. The repeatedly called open and close during reshape generates redundant udev change events on each member drive. Signed-off-by: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com> Signed-off-by: Jes Sorensen <jsorensen@fb.com>
This commit is contained in:
parent
f7a6246bab
commit
2f86fda346
210
super-intel.c
210
super-intel.c
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@ -3055,15 +3055,13 @@ static struct imsm_dev *imsm_get_device_during_migration(
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* sector of disk)
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* sector of disk)
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* Parameters:
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* Parameters:
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* super : imsm internal array info
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* super : imsm internal array info
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* info : general array info
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* Returns:
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* Returns:
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* 0 : success
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* 0 : success
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* -1 : fail
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* -1 : fail
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* -2 : no migration in progress
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* -2 : no migration in progress
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******************************************************************************/
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******************************************************************************/
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static int load_imsm_migr_rec(struct intel_super *super, struct mdinfo *info)
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static int load_imsm_migr_rec(struct intel_super *super)
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{
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{
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struct mdinfo *sd;
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struct dl *dl;
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struct dl *dl;
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char nm[30];
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char nm[30];
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int retval = -1;
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int retval = -1;
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@ -3071,6 +3069,7 @@ static int load_imsm_migr_rec(struct intel_super *super, struct mdinfo *info)
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struct imsm_dev *dev;
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struct imsm_dev *dev;
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struct imsm_map *map;
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struct imsm_map *map;
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int slot = -1;
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int slot = -1;
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int keep_fd = 1;
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/* find map under migration */
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/* find map under migration */
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dev = imsm_get_device_during_migration(super);
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dev = imsm_get_device_during_migration(super);
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@ -3079,44 +3078,40 @@ static int load_imsm_migr_rec(struct intel_super *super, struct mdinfo *info)
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if (dev == NULL)
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if (dev == NULL)
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return -2;
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return -2;
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if (info) {
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map = get_imsm_map(dev, MAP_0);
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for (sd = info->devs ; sd ; sd = sd->next) {
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if (!map)
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/* read only from one of the first two slots */
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return -1;
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if ((sd->disk.raid_disk < 0) ||
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(sd->disk.raid_disk > 1))
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continue;
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sprintf(nm, "%d:%d", sd->disk.major, sd->disk.minor);
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for (dl = super->disks; dl; dl = dl->next) {
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fd = dev_open(nm, O_RDONLY);
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/* skip spare and failed disks
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if (fd >= 0)
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*/
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break;
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if (dl->index < 0)
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}
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continue;
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}
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/* read only from one of the first two slots
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if (fd < 0) {
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*/
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map = get_imsm_map(dev, MAP_0);
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slot = get_imsm_disk_slot(map, dl->index);
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for (dl = super->disks; dl; dl = dl->next) {
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if (slot > 1 || slot < 0)
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/* skip spare and failed disks
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continue;
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*/
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if (dl->index < 0)
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if (dl->fd < 0) {
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continue;
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/* read only from one of the first two slots */
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if (map)
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slot = get_imsm_disk_slot(map, dl->index);
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if (map == NULL || slot > 1 || slot < 0)
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continue;
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sprintf(nm, "%d:%d", dl->major, dl->minor);
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sprintf(nm, "%d:%d", dl->major, dl->minor);
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fd = dev_open(nm, O_RDONLY);
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fd = dev_open(nm, O_RDONLY);
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if (fd >= 0)
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if (fd >= 0) {
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keep_fd = 0;
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break;
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break;
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}
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} else {
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fd = dl->fd;
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break;
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}
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}
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}
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}
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if (fd < 0)
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goto out;
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retval = read_imsm_migr_rec(fd, super);
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out:
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if (fd < 0)
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if (fd >= 0)
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return retval;
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retval = read_imsm_migr_rec(fd, super);
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if (!keep_fd)
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close(fd);
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close(fd);
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return retval;
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return retval;
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}
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}
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@ -3177,8 +3172,6 @@ static int write_imsm_migr_rec(struct supertype *st)
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struct intel_super *super = st->sb;
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struct intel_super *super = st->sb;
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unsigned int sector_size = super->sector_size;
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unsigned int sector_size = super->sector_size;
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unsigned long long dsize;
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unsigned long long dsize;
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char nm[30];
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int fd = -1;
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int retval = -1;
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int retval = -1;
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struct dl *sd;
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struct dl *sd;
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int len;
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int len;
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@ -3211,26 +3204,21 @@ static int write_imsm_migr_rec(struct supertype *st)
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if (map == NULL || slot > 1 || slot < 0)
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if (map == NULL || slot > 1 || slot < 0)
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continue;
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continue;
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sprintf(nm, "%d:%d", sd->major, sd->minor);
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get_dev_size(sd->fd, NULL, &dsize);
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fd = dev_open(nm, O_RDWR);
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if (lseek64(sd->fd, dsize - (MIGR_REC_SECTOR_POSITION *
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if (fd < 0)
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sector_size),
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continue;
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get_dev_size(fd, NULL, &dsize);
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if (lseek64(fd, dsize - (MIGR_REC_SECTOR_POSITION*sector_size),
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SEEK_SET) < 0) {
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SEEK_SET) < 0) {
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pr_err("Cannot seek to anchor block: %s\n",
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pr_err("Cannot seek to anchor block: %s\n",
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strerror(errno));
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strerror(errno));
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goto out;
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goto out;
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}
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}
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if ((unsigned int)write(fd, super->migr_rec_buf,
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if ((unsigned int)write(sd->fd, super->migr_rec_buf,
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MIGR_REC_BUF_SECTORS*sector_size) !=
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MIGR_REC_BUF_SECTORS*sector_size) !=
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MIGR_REC_BUF_SECTORS*sector_size) {
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MIGR_REC_BUF_SECTORS*sector_size) {
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pr_err("Cannot write migr record block: %s\n",
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pr_err("Cannot write migr record block: %s\n",
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strerror(errno));
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strerror(errno));
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goto out;
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goto out;
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}
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}
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close(fd);
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fd = -1;
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}
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}
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if (sector_size == 4096)
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if (sector_size == 4096)
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convert_from_4k_imsm_migr_rec(super);
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convert_from_4k_imsm_migr_rec(super);
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@ -3256,8 +3244,6 @@ static int write_imsm_migr_rec(struct supertype *st)
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retval = 0;
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retval = 0;
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out:
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out:
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if (fd >= 0)
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close(fd);
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return retval;
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return retval;
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}
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}
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@ -5011,7 +4997,7 @@ static int load_super_imsm_all(struct supertype *st, int fd, void **sbp,
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}
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}
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/* load migration record */
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/* load migration record */
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err = load_imsm_migr_rec(super, NULL);
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err = load_imsm_migr_rec(super);
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if (err == -1) {
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if (err == -1) {
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/* migration is in progress,
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/* migration is in progress,
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* but migr_rec cannot be loaded,
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* but migr_rec cannot be loaded,
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@ -5260,7 +5246,7 @@ static int load_super_imsm(struct supertype *st, int fd, char *devname)
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}
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}
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/* load migration record */
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/* load migration record */
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if (load_imsm_migr_rec(super, NULL) == 0) {
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if (load_imsm_migr_rec(super) == 0) {
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/* Check for unsupported migration features */
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/* Check for unsupported migration features */
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if (check_mpb_migr_compatibility(super) != 0) {
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if (check_mpb_migr_compatibility(super) != 0) {
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pr_err("Unsupported migration detected");
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pr_err("Unsupported migration detected");
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@ -10381,21 +10367,6 @@ static void imsm_delete(struct intel_super *super, struct dl **dlp, unsigned ind
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}
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}
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}
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}
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static void close_targets(int *targets, int new_disks)
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{
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int i;
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if (!targets)
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return;
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for (i = 0; i < new_disks; i++) {
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if (targets[i] >= 0) {
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close(targets[i]);
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targets[i] = -1;
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}
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}
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}
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static int imsm_get_allowed_degradation(int level, int raid_disks,
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static int imsm_get_allowed_degradation(int level, int raid_disks,
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struct intel_super *super,
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struct intel_super *super,
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struct imsm_dev *dev)
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struct imsm_dev *dev)
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@ -10449,62 +10420,6 @@ static int imsm_get_allowed_degradation(int level, int raid_disks,
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}
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}
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}
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}
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/*******************************************************************************
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* Function: open_backup_targets
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* Description: Function opens file descriptors for all devices given in
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* info->devs
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* Parameters:
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* info : general array info
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* raid_disks : number of disks
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* raid_fds : table of device's file descriptors
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* super : intel super for raid10 degradation check
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* dev : intel device for raid10 degradation check
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* Returns:
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* 0 : success
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* -1 : fail
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******************************************************************************/
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int open_backup_targets(struct mdinfo *info, int raid_disks, int *raid_fds,
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struct intel_super *super, struct imsm_dev *dev)
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{
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struct mdinfo *sd;
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int i;
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int opened = 0;
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for (i = 0; i < raid_disks; i++)
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raid_fds[i] = -1;
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for (sd = info->devs ; sd ; sd = sd->next) {
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char *dn;
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if (sd->disk.state & (1<<MD_DISK_FAULTY)) {
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dprintf("disk is faulty!!\n");
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continue;
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}
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if (sd->disk.raid_disk >= raid_disks || sd->disk.raid_disk < 0)
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continue;
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dn = map_dev(sd->disk.major,
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sd->disk.minor, 1);
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raid_fds[sd->disk.raid_disk] = dev_open(dn, O_RDWR);
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if (raid_fds[sd->disk.raid_disk] < 0) {
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pr_err("cannot open component\n");
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continue;
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}
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opened++;
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}
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/* check if maximum array degradation level is not exceeded
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*/
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if ((raid_disks - opened) >
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imsm_get_allowed_degradation(info->new_level, raid_disks,
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super, dev)) {
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pr_err("Not enough disks can be opened.\n");
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close_targets(raid_fds, raid_disks);
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return -2;
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}
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return 0;
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}
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/*******************************************************************************
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/*******************************************************************************
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* Function: validate_container_imsm
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* Function: validate_container_imsm
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* Description: This routine validates container after assemble,
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* Description: This routine validates container after assemble,
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@ -10745,13 +10660,11 @@ void init_migr_record_imsm(struct supertype *st, struct imsm_dev *dev,
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int new_data_disks;
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int new_data_disks;
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unsigned long long dsize, dev_sectors;
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unsigned long long dsize, dev_sectors;
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long long unsigned min_dev_sectors = -1LLU;
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long long unsigned min_dev_sectors = -1LLU;
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struct mdinfo *sd;
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char nm[30];
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int fd;
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struct imsm_map *map_dest = get_imsm_map(dev, MAP_0);
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struct imsm_map *map_dest = get_imsm_map(dev, MAP_0);
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struct imsm_map *map_src = get_imsm_map(dev, MAP_1);
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struct imsm_map *map_src = get_imsm_map(dev, MAP_1);
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unsigned long long num_migr_units;
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unsigned long long num_migr_units;
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unsigned long long array_blocks;
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unsigned long long array_blocks;
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struct dl *dl_disk = NULL;
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memset(migr_rec, 0, sizeof(struct migr_record));
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memset(migr_rec, 0, sizeof(struct migr_record));
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migr_rec->family_num = __cpu_to_le32(super->anchor->family_num);
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migr_rec->family_num = __cpu_to_le32(super->anchor->family_num);
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@ -10780,16 +10693,14 @@ void init_migr_record_imsm(struct supertype *st, struct imsm_dev *dev,
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migr_rec->post_migr_vol_cap_hi = dev->size_high;
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migr_rec->post_migr_vol_cap_hi = dev->size_high;
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/* Find the smallest dev */
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/* Find the smallest dev */
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for (sd = info->devs ; sd ; sd = sd->next) {
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for (dl_disk = super->disks; dl_disk ; dl_disk = dl_disk->next) {
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sprintf(nm, "%d:%d", sd->disk.major, sd->disk.minor);
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/* ignore spares in container */
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fd = dev_open(nm, O_RDONLY);
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if (dl_disk->index < 0)
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if (fd < 0)
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continue;
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continue;
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get_dev_size(fd, NULL, &dsize);
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get_dev_size(dl_disk->fd, NULL, &dsize);
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dev_sectors = dsize / 512;
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dev_sectors = dsize / 512;
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if (dev_sectors < min_dev_sectors)
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if (dev_sectors < min_dev_sectors)
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min_dev_sectors = dev_sectors;
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min_dev_sectors = dev_sectors;
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close(fd);
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}
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}
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set_migr_chkp_area_pba(migr_rec, min_dev_sectors -
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set_migr_chkp_area_pba(migr_rec, min_dev_sectors -
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RAID_DISK_RESERVED_BLOCKS_IMSM_HI);
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RAID_DISK_RESERVED_BLOCKS_IMSM_HI);
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@ -10835,8 +10746,11 @@ int save_backup_imsm(struct supertype *st,
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targets = xmalloc(new_disks * sizeof(int));
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targets = xmalloc(new_disks * sizeof(int));
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for (i = 0; i < new_disks; i++)
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for (i = 0; i < new_disks; i++) {
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targets[i] = -1;
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struct dl *dl_disk = get_imsm_dl_disk(super, i);
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targets[i] = dl_disk->fd;
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}
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target_offsets = xcalloc(new_disks, sizeof(unsigned long long));
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target_offsets = xcalloc(new_disks, sizeof(unsigned long long));
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@ -10849,10 +10763,6 @@ int save_backup_imsm(struct supertype *st,
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target_offsets[i] -= start/data_disks;
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target_offsets[i] -= start/data_disks;
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}
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}
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if (open_backup_targets(info, new_disks, targets,
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super, dev))
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goto abort;
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dest_layout = imsm_level_to_layout(map_dest->raid_level);
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dest_layout = imsm_level_to_layout(map_dest->raid_level);
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dest_chunk = __le16_to_cpu(map_dest->blocks_per_strip) * 512;
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dest_chunk = __le16_to_cpu(map_dest->blocks_per_strip) * 512;
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@ -10876,7 +10786,6 @@ int save_backup_imsm(struct supertype *st,
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abort:
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abort:
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if (targets) {
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if (targets) {
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close_targets(targets, new_disks);
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free(targets);
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free(targets);
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}
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}
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free(target_offsets);
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free(target_offsets);
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@ -10903,7 +10812,7 @@ int save_checkpoint_imsm(struct supertype *st, struct mdinfo *info, int state)
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unsigned long long blocks_per_unit;
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unsigned long long blocks_per_unit;
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unsigned long long curr_migr_unit;
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unsigned long long curr_migr_unit;
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if (load_imsm_migr_rec(super, info) != 0) {
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if (load_imsm_migr_rec(super) != 0) {
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dprintf("imsm: ERROR: Cannot read migration record for checkpoint save.\n");
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dprintf("imsm: ERROR: Cannot read migration record for checkpoint save.\n");
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return 1;
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return 1;
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}
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}
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@ -10954,8 +10863,7 @@ int recover_backup_imsm(struct supertype *st, struct mdinfo *info)
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unsigned long long read_offset;
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unsigned long long read_offset;
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unsigned long long write_offset;
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unsigned long long write_offset;
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unsigned unit_len;
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unsigned unit_len;
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int *targets = NULL;
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int new_disks, err;
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int new_disks, i, err;
|
|
||||||
char *buf = NULL;
|
char *buf = NULL;
|
||||||
int retval = 1;
|
int retval = 1;
|
||||||
unsigned int sector_size = super->sector_size;
|
unsigned int sector_size = super->sector_size;
|
||||||
|
@ -10963,6 +10871,7 @@ int recover_backup_imsm(struct supertype *st, struct mdinfo *info)
|
||||||
unsigned long num_migr_units = get_num_migr_units(migr_rec);
|
unsigned long num_migr_units = get_num_migr_units(migr_rec);
|
||||||
char buffer[20];
|
char buffer[20];
|
||||||
int skipped_disks = 0;
|
int skipped_disks = 0;
|
||||||
|
struct dl *dl_disk;
|
||||||
|
|
||||||
err = sysfs_get_str(info, NULL, "array_state", (char *)buffer, 20);
|
err = sysfs_get_str(info, NULL, "array_state", (char *)buffer, 20);
|
||||||
if (err < 1)
|
if (err < 1)
|
||||||
|
@ -10995,37 +10904,34 @@ int recover_backup_imsm(struct supertype *st, struct mdinfo *info)
|
||||||
unit_len = __le32_to_cpu(migr_rec->dest_depth_per_unit) * 512;
|
unit_len = __le32_to_cpu(migr_rec->dest_depth_per_unit) * 512;
|
||||||
if (posix_memalign((void **)&buf, sector_size, unit_len) != 0)
|
if (posix_memalign((void **)&buf, sector_size, unit_len) != 0)
|
||||||
goto abort;
|
goto abort;
|
||||||
targets = xcalloc(new_disks, sizeof(int));
|
|
||||||
|
|
||||||
if (open_backup_targets(info, new_disks, targets, super, id->dev)) {
|
for (dl_disk = super->disks; dl_disk; dl_disk = dl_disk->next) {
|
||||||
pr_err("Cannot open some devices belonging to array.\n");
|
if (dl_disk->index < 0)
|
||||||
goto abort;
|
continue;
|
||||||
}
|
|
||||||
|
|
||||||
for (i = 0; i < new_disks; i++) {
|
if (dl_disk->fd < 0) {
|
||||||
if (targets[i] < 0) {
|
|
||||||
skipped_disks++;
|
skipped_disks++;
|
||||||
continue;
|
continue;
|
||||||
}
|
}
|
||||||
if (lseek64(targets[i], read_offset, SEEK_SET) < 0) {
|
if (lseek64(dl_disk->fd, read_offset, SEEK_SET) < 0) {
|
||||||
pr_err("Cannot seek to block: %s\n",
|
pr_err("Cannot seek to block: %s\n",
|
||||||
strerror(errno));
|
strerror(errno));
|
||||||
skipped_disks++;
|
skipped_disks++;
|
||||||
continue;
|
continue;
|
||||||
}
|
}
|
||||||
if ((unsigned)read(targets[i], buf, unit_len) != unit_len) {
|
if (read(dl_disk->fd, buf, unit_len) != unit_len) {
|
||||||
pr_err("Cannot read copy area block: %s\n",
|
pr_err("Cannot read copy area block: %s\n",
|
||||||
strerror(errno));
|
strerror(errno));
|
||||||
skipped_disks++;
|
skipped_disks++;
|
||||||
continue;
|
continue;
|
||||||
}
|
}
|
||||||
if (lseek64(targets[i], write_offset, SEEK_SET) < 0) {
|
if (lseek64(dl_disk->fd, write_offset, SEEK_SET) < 0) {
|
||||||
pr_err("Cannot seek to block: %s\n",
|
pr_err("Cannot seek to block: %s\n",
|
||||||
strerror(errno));
|
strerror(errno));
|
||||||
skipped_disks++;
|
skipped_disks++;
|
||||||
continue;
|
continue;
|
||||||
}
|
}
|
||||||
if ((unsigned)write(targets[i], buf, unit_len) != unit_len) {
|
if (write(dl_disk->fd, buf, unit_len) != unit_len) {
|
||||||
pr_err("Cannot restore block: %s\n",
|
pr_err("Cannot restore block: %s\n",
|
||||||
strerror(errno));
|
strerror(errno));
|
||||||
skipped_disks++;
|
skipped_disks++;
|
||||||
|
@ -11049,12 +10955,6 @@ int recover_backup_imsm(struct supertype *st, struct mdinfo *info)
|
||||||
retval = 0;
|
retval = 0;
|
||||||
|
|
||||||
abort:
|
abort:
|
||||||
if (targets) {
|
|
||||||
for (i = 0; i < new_disks; i++)
|
|
||||||
if (targets[i])
|
|
||||||
close(targets[i]);
|
|
||||||
free(targets);
|
|
||||||
}
|
|
||||||
free(buf);
|
free(buf);
|
||||||
return retval;
|
return retval;
|
||||||
}
|
}
|
||||||
|
|
Loading…
Reference in New Issue