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path: root/drivers/md/bcache/sysfs.c
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Diffstat (limited to 'drivers/md/bcache/sysfs.c')
-rw-r--r--drivers/md/bcache/sysfs.c68
1 files changed, 45 insertions, 23 deletions
diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c
index 4d9cca47e4c6..12a2c2846f99 100644
--- a/drivers/md/bcache/sysfs.c
+++ b/drivers/md/bcache/sysfs.c
@@ -9,7 +9,9 @@
#include "sysfs.h"
#include "btree.h"
#include "request.h"
+#include "writeback.h"
+#include <linux/blkdev.h>
#include <linux/sort.h>
static const char * const cache_replacement_policies[] = {
@@ -79,6 +81,9 @@ rw_attribute(writeback_rate_p_term_inverse);
rw_attribute(writeback_rate_d_smooth);
read_attribute(writeback_rate_debug);
+read_attribute(stripe_size);
+read_attribute(partial_stripes_expensive);
+
rw_attribute(synchronous);
rw_attribute(journal_delay_ms);
rw_attribute(discard);
@@ -127,7 +132,7 @@ SHOW(__bch_cached_dev)
char derivative[20];
char target[20];
bch_hprint(dirty,
- atomic_long_read(&dc->disk.sectors_dirty) << 9);
+ bcache_dev_sectors_dirty(&dc->disk) << 9);
bch_hprint(derivative, dc->writeback_rate_derivative << 9);
bch_hprint(target, dc->writeback_rate_target << 9);
@@ -143,7 +148,10 @@ SHOW(__bch_cached_dev)
}
sysfs_hprint(dirty_data,
- atomic_long_read(&dc->disk.sectors_dirty) << 9);
+ bcache_dev_sectors_dirty(&dc->disk) << 9);
+
+ sysfs_hprint(stripe_size, (1 << dc->disk.stripe_size_bits) << 9);
+ var_printf(partial_stripes_expensive, "%u");
var_printf(sequential_merge, "%i");
var_hprint(sequential_cutoff);
@@ -170,6 +178,7 @@ STORE(__cached_dev)
disk.kobj);
unsigned v = size;
struct cache_set *c;
+ struct kobj_uevent_env *env;
#define d_strtoul(var) sysfs_strtoul(var, dc->var)
#define d_strtoi_h(var) sysfs_hatoi(var, dc->var)
@@ -214,6 +223,7 @@ STORE(__cached_dev)
}
if (attr == &sysfs_label) {
+ /* note: endlines are preserved */
memcpy(dc->sb.label, buf, SB_LABEL_SIZE);
bch_write_bdev_super(dc, NULL);
if (dc->disk.c) {
@@ -221,6 +231,15 @@ STORE(__cached_dev)
buf, SB_LABEL_SIZE);
bch_uuid_write(dc->disk.c);
}
+ env = kzalloc(sizeof(struct kobj_uevent_env), GFP_KERNEL);
+ if (!env)
+ return -ENOMEM;
+ add_uevent_var(env, "DRIVER=bcache");
+ add_uevent_var(env, "CACHED_UUID=%pU", dc->sb.uuid),
+ add_uevent_var(env, "CACHED_LABEL=%s", buf);
+ kobject_uevent_env(
+ &disk_to_dev(dc->disk.disk)->kobj, KOBJ_CHANGE, env->envp);
+ kfree(env);
}
if (attr == &sysfs_attach) {
@@ -284,6 +303,8 @@ static struct attribute *bch_cached_dev_files[] = {
&sysfs_writeback_rate_d_smooth,
&sysfs_writeback_rate_debug,
&sysfs_dirty_data,
+ &sysfs_stripe_size,
+ &sysfs_partial_stripes_expensive,
&sysfs_sequential_cutoff,
&sysfs_sequential_merge,
&sysfs_clear_stats,
@@ -665,12 +686,10 @@ SHOW(__bch_cache)
int cmp(const void *l, const void *r)
{ return *((uint16_t *) r) - *((uint16_t *) l); }
- /* Number of quantiles we compute */
- const unsigned nq = 31;
-
size_t n = ca->sb.nbuckets, i, unused, btree;
uint64_t sum = 0;
- uint16_t q[nq], *p, *cached;
+ /* Compute 31 quantiles */
+ uint16_t q[31], *p, *cached;
ssize_t ret;
cached = p = vmalloc(ca->sb.nbuckets * sizeof(uint16_t));
@@ -703,26 +722,29 @@ SHOW(__bch_cache)
if (n)
do_div(sum, n);
- for (i = 0; i < nq; i++)
- q[i] = INITIAL_PRIO - cached[n * (i + 1) / (nq + 1)];
+ for (i = 0; i < ARRAY_SIZE(q); i++)
+ q[i] = INITIAL_PRIO - cached[n * (i + 1) /
+ (ARRAY_SIZE(q) + 1)];
vfree(p);
- ret = snprintf(buf, PAGE_SIZE,
- "Unused: %zu%%\n"
- "Metadata: %zu%%\n"
- "Average: %llu\n"
- "Sectors per Q: %zu\n"
- "Quantiles: [",
- unused * 100 / (size_t) ca->sb.nbuckets,
- btree * 100 / (size_t) ca->sb.nbuckets, sum,
- n * ca->sb.bucket_size / (nq + 1));
-
- for (i = 0; i < nq && ret < (ssize_t) PAGE_SIZE; i++)
- ret += snprintf(buf + ret, PAGE_SIZE - ret,
- i < nq - 1 ? "%u " : "%u]\n", q[i]);
-
- buf[PAGE_SIZE - 1] = '\0';
+ ret = scnprintf(buf, PAGE_SIZE,
+ "Unused: %zu%%\n"
+ "Metadata: %zu%%\n"
+ "Average: %llu\n"
+ "Sectors per Q: %zu\n"
+ "Quantiles: [",
+ unused * 100 / (size_t) ca->sb.nbuckets,
+ btree * 100 / (size_t) ca->sb.nbuckets, sum,
+ n * ca->sb.bucket_size / (ARRAY_SIZE(q) + 1));
+
+ for (i = 0; i < ARRAY_SIZE(q); i++)
+ ret += scnprintf(buf + ret, PAGE_SIZE - ret,
+ "%u ", q[i]);
+ ret--;
+
+ ret += scnprintf(buf + ret, PAGE_SIZE - ret, "]\n");
+
return ret;
}