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authorJens Axboe <jaxboe@fusionio.com>2010-08-07 18:13:50 +0200
committerJens Axboe <jaxboe@fusionio.com>2010-08-07 18:13:50 +0200
commit956bcb7c1a9a73c6d5db66e83f32c785d06dc8fc (patch)
treedca3c08c3bff512c9d47a78c6762b006e165cc5d /block/blk-sysfs.c
parente2e1a148bc45855816ae6b4692ce29d0020fa22e (diff)
downloadlinux-stericsson-956bcb7c1a9a73c6d5db66e83f32c785d06dc8fc.tar.gz
block: add helpers for the trivial queue flag sysfs show/store entries
The code for nonrot, random, and io stats are completely identical. Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'block/blk-sysfs.c')
-rw-r--r--block/blk-sysfs.c104
1 files changed, 36 insertions, 68 deletions
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index 58b53c354c2c..001ab18078f5 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -180,26 +180,36 @@ static ssize_t queue_max_hw_sectors_show(struct request_queue *q, char *page)
return queue_var_show(max_hw_sectors_kb, (page));
}
-static ssize_t queue_nonrot_show(struct request_queue *q, char *page)
-{
- return queue_var_show(!blk_queue_nonrot(q), page);
-}
-
-static ssize_t queue_nonrot_store(struct request_queue *q, const char *page,
- size_t count)
-{
- unsigned long nm;
- ssize_t ret = queue_var_store(&nm, page, count);
-
- spin_lock_irq(q->queue_lock);
- if (nm)
- queue_flag_clear(QUEUE_FLAG_NONROT, q);
- else
- queue_flag_set(QUEUE_FLAG_NONROT, q);
- spin_unlock_irq(q->queue_lock);
-
- return ret;
-}
+#define QUEUE_SYSFS_BIT_FNS(name, flag, neg) \
+static ssize_t \
+queue_show_##name(struct request_queue *q, char *page) \
+{ \
+ int bit; \
+ bit = test_bit(QUEUE_FLAG_##flag, &q->queue_flags); \
+ return queue_var_show(neg ? !bit : bit, page); \
+} \
+static ssize_t \
+queue_store_##name(struct request_queue *q, const char *page, size_t count) \
+{ \
+ unsigned long val; \
+ ssize_t ret; \
+ ret = queue_var_store(&val, page, count); \
+ if (neg) \
+ val = !val; \
+ \
+ spin_lock_irq(q->queue_lock); \
+ if (val) \
+ queue_flag_set(QUEUE_FLAG_##flag, q); \
+ else \
+ queue_flag_clear(QUEUE_FLAG_##flag, q); \
+ spin_unlock_irq(q->queue_lock); \
+ return ret; \
+}
+
+QUEUE_SYSFS_BIT_FNS(nonrot, NONROT, 1);
+QUEUE_SYSFS_BIT_FNS(random, ADD_RANDOM, 0);
+QUEUE_SYSFS_BIT_FNS(iostats, IO_STAT, 0);
+#undef QUEUE_SYSFS_BIT_FNS
static ssize_t queue_nomerges_show(struct request_queue *q, char *page)
{
@@ -250,48 +260,6 @@ queue_rq_affinity_store(struct request_queue *q, const char *page, size_t count)
return ret;
}
-static ssize_t queue_random_show(struct request_queue *q, char *page)
-{
- return queue_var_show(blk_queue_add_random(q), page);
-}
-
-static ssize_t queue_random_store(struct request_queue *q, const char *page,
- size_t count)
-{
- unsigned long val;
- ssize_t ret = queue_var_store(&val, page, count);
-
- spin_lock_irq(q->queue_lock);
- if (val)
- queue_flag_set(QUEUE_FLAG_ADD_RANDOM, q);
- else
- queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, q);
- spin_unlock_irq(q->queue_lock);
-
- return ret;
-}
-
-static ssize_t queue_iostats_show(struct request_queue *q, char *page)
-{
- return queue_var_show(blk_queue_io_stat(q), page);
-}
-
-static ssize_t queue_iostats_store(struct request_queue *q, const char *page,
- size_t count)
-{
- unsigned long stats;
- ssize_t ret = queue_var_store(&stats, page, count);
-
- spin_lock_irq(q->queue_lock);
- if (stats)
- queue_flag_set(QUEUE_FLAG_IO_STAT, q);
- else
- queue_flag_clear(QUEUE_FLAG_IO_STAT, q);
- spin_unlock_irq(q->queue_lock);
-
- return ret;
-}
-
static struct queue_sysfs_entry queue_requests_entry = {
.attr = {.name = "nr_requests", .mode = S_IRUGO | S_IWUSR },
.show = queue_requests_show,
@@ -373,8 +341,8 @@ static struct queue_sysfs_entry queue_discard_zeroes_data_entry = {
static struct queue_sysfs_entry queue_nonrot_entry = {
.attr = {.name = "rotational", .mode = S_IRUGO | S_IWUSR },
- .show = queue_nonrot_show,
- .store = queue_nonrot_store,
+ .show = queue_show_nonrot,
+ .store = queue_store_nonrot,
};
static struct queue_sysfs_entry queue_nomerges_entry = {
@@ -391,14 +359,14 @@ static struct queue_sysfs_entry queue_rq_affinity_entry = {
static struct queue_sysfs_entry queue_iostats_entry = {
.attr = {.name = "iostats", .mode = S_IRUGO | S_IWUSR },
- .show = queue_iostats_show,
- .store = queue_iostats_store,
+ .show = queue_show_iostats,
+ .store = queue_store_iostats,
};
static struct queue_sysfs_entry queue_random_entry = {
.attr = {.name = "add_random", .mode = S_IRUGO | S_IWUSR },
- .show = queue_random_show,
- .store = queue_random_store,
+ .show = queue_show_random,
+ .store = queue_store_random,
};
static struct attribute *default_attrs[] = {