diff options
| author | Christoph Hellwig <hch@lst.de> | 2024-06-17 08:04:41 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2024-06-19 15:58:28 +0200 |
| commit | bd4a633b6f7c3c6b6ebc1a07317643270e751a94 (patch) | |
| tree | b51e88fc2def6fe0e5e7d8e880b27f5cf666f525 /block/blk-sysfs.c | |
| parent | block: move cache control settings out of queue->flags (diff) | |
| download | linux-bd4a633b6f7c3c6b6ebc1a07317643270e751a94.tar.xz linux-bd4a633b6f7c3c6b6ebc1a07317643270e751a94.zip | |
block: move the nonrot flag to queue_limits
Move the nonrot flag into the queue_limits feature field so that it can
be set atomically with the queue frozen.
Use the chance to switch to defaulting to non-rotational and require
the driver to opt into rotational, which matches the polarity of the
sysfs interface.
For the z2ram, ps3vram, 2x memstick, ubiblock and dcssblk the new
rotational flag is not set as they clearly are not rotational despite
this being a behavior change. There are some other drivers that
unconditionally set the rotational flag to keep the existing behavior
as they arguably can be used on rotational devices even if that is
probably not their main use today (e.g. virtio_blk and drbd).
The flag is automatically inherited in blk_stack_limits matching the
existing behavior in dm and md.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Link: https://lore.kernel.org/r/20240617060532.127975-15-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-sysfs.c')
| -rw-r--r-- | block/blk-sysfs.c | 39 |
1 files changed, 36 insertions, 3 deletions
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index 4f524c1d5e08..637ed3bbbfb4 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -263,6 +263,39 @@ static ssize_t queue_dma_alignment_show(struct request_queue *q, char *page) return queue_var_show(queue_dma_alignment(q), page); } +static ssize_t queue_feature_store(struct request_queue *q, const char *page, + size_t count, unsigned int feature) +{ + struct queue_limits lim; + unsigned long val; + ssize_t ret; + + ret = queue_var_store(&val, page, count); + if (ret < 0) + return ret; + + lim = queue_limits_start_update(q); + if (val) + lim.features |= feature; + else + lim.features &= ~feature; + ret = queue_limits_commit_update(q, &lim); + if (ret) + return ret; + return count; +} + +#define QUEUE_SYSFS_FEATURE(_name, _feature) \ +static ssize_t queue_##_name##_show(struct request_queue *q, char *page) \ +{ \ + return sprintf(page, "%u\n", !!(q->limits.features & _feature)); \ +} \ +static ssize_t queue_##_name##_store(struct request_queue *q, \ + const char *page, size_t count) \ +{ \ + return queue_feature_store(q, page, count, _feature); \ +} + #define QUEUE_SYSFS_BIT_FNS(name, flag, neg) \ static ssize_t \ queue_##name##_show(struct request_queue *q, char *page) \ @@ -289,7 +322,7 @@ queue_##name##_store(struct request_queue *q, const char *page, size_t count) \ return ret; \ } -QUEUE_SYSFS_BIT_FNS(nonrot, NONROT, 1); +QUEUE_SYSFS_FEATURE(rotational, BLK_FEAT_ROTATIONAL) QUEUE_SYSFS_BIT_FNS(random, ADD_RANDOM, 0); QUEUE_SYSFS_BIT_FNS(iostats, IO_STAT, 0); QUEUE_SYSFS_BIT_FNS(stable_writes, STABLE_WRITES, 0); @@ -526,7 +559,7 @@ static struct queue_sysfs_entry queue_hw_sector_size_entry = { .show = queue_logical_block_size_show, }; -QUEUE_RW_ENTRY(queue_nonrot, "rotational"); +QUEUE_RW_ENTRY(queue_rotational, "rotational"); QUEUE_RW_ENTRY(queue_iostats, "iostats"); QUEUE_RW_ENTRY(queue_random, "add_random"); QUEUE_RW_ENTRY(queue_stable_writes, "stable_writes"); @@ -624,7 +657,7 @@ static struct attribute *queue_attrs[] = { &queue_write_zeroes_max_entry.attr, &queue_zone_append_max_entry.attr, &queue_zone_write_granularity_entry.attr, - &queue_nonrot_entry.attr, + &queue_rotational_entry.attr, &queue_zoned_entry.attr, &queue_nr_zones_entry.attr, &queue_max_open_zones_entry.attr, |