q->seq_zones_wlock = NULL;
}
+/*
+ * Helper function to check the validity of zones of a zoned block device.
+ */
+static bool blk_zone_valid(struct gendisk *disk, struct blk_zone *zone,
+ sector_t *sector)
+{
+ struct request_queue *q = disk->queue;
+ sector_t zone_sectors = blk_queue_zone_sectors(q);
+ sector_t capacity = get_capacity(disk);
+
+ /*
+ * All zones must have the same size, with the exception on an eventual
+ * smaller last zone.
+ */
+ if (zone->start + zone_sectors < capacity &&
+ zone->len != zone_sectors) {
+ pr_warn("%s: Invalid zoned device with non constant zone size\n",
+ disk->disk_name);
+ return false;
+ }
+
+ if (zone->start + zone->len >= capacity &&
+ zone->len > zone_sectors) {
+ pr_warn("%s: Invalid zoned device with larger last zone size\n",
+ disk->disk_name);
+ return false;
+ }
+
+ /* Check for holes in the zone report */
+ if (zone->start != *sector) {
+ pr_warn("%s: Zone gap at sectors %llu..%llu\n",
+ disk->disk_name, *sector, zone->start);
+ return false;
+ }
+
+ /* Check zone type */
+ switch (zone->type) {
+ case BLK_ZONE_TYPE_CONVENTIONAL:
+ case BLK_ZONE_TYPE_SEQWRITE_REQ:
+ case BLK_ZONE_TYPE_SEQWRITE_PREF:
+ break;
+ default:
+ pr_warn("%s: Invalid zone type 0x%x at sectors %llu\n",
+ disk->disk_name, (int)zone->type, zone->start);
+ return false;
+ }
+
+ *sector += zone->len;
+
+ return true;
+}
+
/**
* blk_revalidate_disk_zones - (re)allocate and initialize zone bitmaps
* @disk: Target disk
if (!seq_zones_bitmap)
goto out;
- /* Get zone information and initialize seq_zones_bitmap */
+ /*
+ * Get zone information to check the zones and initialize
+ * seq_zones_bitmap.
+ */
rep_nr_zones = nr_zones;
zones = blk_alloc_zones(&rep_nr_zones);
if (!zones)
if (!nrz)
break;
for (i = 0; i < nrz; i++) {
+ if (!blk_zone_valid(disk, &zones[i], §or)) {
+ ret = -ENODEV;
+ goto out;
+ }
if (zones[i].type != BLK_ZONE_TYPE_CONVENTIONAL)
set_bit(z, seq_zones_bitmap);
z++;
}
- sector += nrz * blk_queue_zone_sectors(q);
}
if (WARN_ON(z != nr_zones)) {
* Returns the zone size in number of blocks upon success or an error code
* upon failure.
*/
-static int sd_zbc_check_zones(struct scsi_disk *sdkp, u32 *zblocks)
+static int sd_zbc_check_zones(struct scsi_disk *sdkp, unsigned char *buf,
+ u32 *zblocks)
{
- size_t bufsize, buflen;
- unsigned int noio_flag;
+ size_t buflen;
u64 zone_blocks = 0;
- sector_t max_lba, block = 0;
- unsigned char *buf;
+ sector_t max_lba;
unsigned char *rec;
int ret;
- u8 same;
-
- /* Do all memory allocations as if GFP_NOIO was specified */
- noio_flag = memalloc_noio_save();
- /* Get a buffer */
- buf = sd_zbc_alloc_report_buffer(sdkp, SD_ZBC_REPORT_MAX_ZONES,
- &bufsize);
- if (!buf) {
- ret = -ENOMEM;
- goto out;
- }
-
- /* Do a report zone to get max_lba and the same field */
- ret = sd_zbc_do_report_zones(sdkp, buf, bufsize, 0, false);
+ /* Do a report zone to get max_lba and the size of the first zone */
+ ret = sd_zbc_do_report_zones(sdkp, buf, SD_BUF_SIZE, 0, false);
if (ret)
- goto out_free;
+ return ret;
if (sdkp->rc_basis == 0) {
/* The max_lba field is the capacity of this device */
}
}
- /*
- * Check same field: for any value other than 0, we know that all zones
- * have the same size.
- */
- same = buf[4] & 0x0f;
- if (same > 0) {
- rec = &buf[64];
- zone_blocks = get_unaligned_be64(&rec[8]);
- goto out;
- }
-
- /*
- * Check the size of all zones: all zones must be of
- * equal size, except the last zone which can be smaller
- * than other zones.
- */
- do {
-
- /* Parse REPORT ZONES header */
- buflen = min_t(size_t, get_unaligned_be32(&buf[0]) + 64,
- bufsize);
- rec = buf + 64;
-
- /* Parse zone descriptors */
- while (rec < buf + buflen) {
- u64 this_zone_blocks = get_unaligned_be64(&rec[8]);
-
- if (zone_blocks == 0) {
- zone_blocks = this_zone_blocks;
- } else if (this_zone_blocks != zone_blocks &&
- (block + this_zone_blocks < sdkp->capacity
- || this_zone_blocks > zone_blocks)) {
- zone_blocks = 0;
- goto out;
- }
- block += this_zone_blocks;
- rec += 64;
- }
-
- if (block < sdkp->capacity) {
- ret = sd_zbc_do_report_zones(sdkp, buf, bufsize, block,
- true);
- if (ret)
- goto out_free;
- }
-
- } while (block < sdkp->capacity);
-
-out:
- if (!zone_blocks) {
- if (sdkp->first_scan)
- sd_printk(KERN_NOTICE, sdkp,
- "Devices with non constant zone "
- "size are not supported\n");
- ret = -ENODEV;
- } else if (!is_power_of_2(zone_blocks)) {
+ /* Parse REPORT ZONES header */
+ buflen = min_t(size_t, get_unaligned_be32(&buf[0]) + 64, SD_BUF_SIZE);
+ rec = buf + 64;
+ zone_blocks = get_unaligned_be64(&rec[8]);
+ if (!zone_blocks || !is_power_of_2(zone_blocks)) {
if (sdkp->first_scan)
sd_printk(KERN_NOTICE, sdkp,
"Devices with non power of 2 zone "
"size are not supported\n");
- ret = -ENODEV;
- } else if (logical_to_sectors(sdkp->device, zone_blocks) > UINT_MAX) {
+ return -ENODEV;
+ }
+
+ if (logical_to_sectors(sdkp->device, zone_blocks) > UINT_MAX) {
if (sdkp->first_scan)
sd_printk(KERN_NOTICE, sdkp,
"Zone size too large\n");
- ret = -EFBIG;
- } else {
- *zblocks = zone_blocks;
- ret = 0;
+ return -EFBIG;
}
-out_free:
- memalloc_noio_restore(noio_flag);
- kvfree(buf);
+ *zblocks = zone_blocks;
- return ret;
+ return 0;
}
int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buf)
* Check zone size: only devices with a constant zone size (except
* an eventual last runt zone) that is a power of 2 are supported.
*/
- ret = sd_zbc_check_zones(sdkp, &zone_blocks);
+ ret = sd_zbc_check_zones(sdkp, buf, &zone_blocks);
if (ret != 0)
goto err;
projects / users / hch / configfs.git / commitdiff