diff options
| author | Damien Le Moal | 2019-12-03 10:39:01 +0100 |
|---|---|---|
| committer | Jens Axboe | 2019-12-03 08:51:24 -0700 |
| commit | 5c4bd1f40c23d08ffbdccd68a5fd63751c794d89 (patch) | |
| tree | 20b405541c6e1b71dd27c60105d067fa3a76cea2 /drivers/block | |
| parent | 795ee49c1a28d1b3eeb2b463f18d557700fc6153 (diff) | |
null_blk: fix zone size paramter check
For zoned=1 mode, the zone size must be a power of 2. Check this not
only when the zone size is specified during modprobe, but also when
creating a zoned null_blk device using configfs.
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/null_blk_main.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/drivers/block/null_blk_main.c b/drivers/block/null_blk_main.c index 795fda576824..53ba9c7f2786 100644 --- a/drivers/block/null_blk_main.c +++ b/drivers/block/null_blk_main.c @@ -1607,7 +1607,7 @@ static int null_init_tag_set(struct nullb *nullb, struct blk_mq_tag_set *set) return blk_mq_alloc_tag_set(set); } -static void null_validate_conf(struct nullb_device *dev) +static int null_validate_conf(struct nullb_device *dev) { dev->blocksize = round_down(dev->blocksize, 512); dev->blocksize = clamp_t(unsigned int, dev->blocksize, 512, 4096); @@ -1634,6 +1634,14 @@ static void null_validate_conf(struct nullb_device *dev) /* can not stop a queue */ if (dev->queue_mode == NULL_Q_BIO) dev->mbps = 0; + + if (dev->zoned && + (!dev->zone_size || !is_power_of_2(dev->zone_size))) { + pr_err("zone_size must be power-of-two\n"); + return -EINVAL; + } + + return 0; } #ifdef CONFIG_BLK_DEV_NULL_BLK_FAULT_INJECTION @@ -1666,7 +1674,9 @@ static int null_add_dev(struct nullb_device *dev) struct nullb *nullb; int rv; - null_validate_conf(dev); + rv = null_validate_conf(dev); + if (rv) + return rv; nullb = kzalloc_node(sizeof(*nullb), GFP_KERNEL, dev->home_node); if (!nullb) { @@ -1792,11 +1802,6 @@ static int __init null_init(void) g_bs = PAGE_SIZE; } - if (!is_power_of_2(g_zone_size)) { - pr_err("zone_size must be power-of-two\n"); - return -EINVAL; - } - if (g_home_node != NUMA_NO_NODE && g_home_node >= nr_online_nodes) { pr_err("invalid home_node value\n"); g_home_node = NUMA_NO_NODE; |