From dc9d98d621bdce0552997200ce855659875a5c9f Mon Sep 17 00:00:00 2001 From: Kent Overstreet Date: Tue, 17 Dec 2013 23:47:33 -0800 Subject: [PATCH] bcache: Convert debug code to btree_keys More work to disentangle various code from struct btree Signed-off-by: Kent Overstreet --- drivers/md/bcache/bset.c | 117 ++++++++++++++++++++++++++++- drivers/md/bcache/bset.h | 56 +++++++++++--- drivers/md/bcache/btree.c | 8 +- drivers/md/bcache/debug.c | 179 ++------------------------------------------ drivers/md/bcache/debug.h | 23 +----- drivers/md/bcache/extents.c | 93 ++++++++++++++++++++++- drivers/md/bcache/extents.h | 1 + drivers/md/bcache/super.c | 2 +- drivers/md/bcache/util.h | 2 + 9 files changed, 264 insertions(+), 217 deletions(-) diff --git a/drivers/md/bcache/bset.c b/drivers/md/bcache/bset.c index 097bd8d..448cff8 100644 --- a/drivers/md/bcache/bset.c +++ b/drivers/md/bcache/bset.c @@ -7,11 +7,121 @@ #include "bcache.h" #include "btree.h" -#include "debug.h" +#include #include #include +#ifdef CONFIG_BCACHE_DEBUG + +void bch_dump_bset(struct btree_keys *b, struct bset *i, unsigned set) +{ + struct bkey *k, *next; + + for (k = i->start; k < bset_bkey_last(i); k = next) { + next = bkey_next(k); + + printk(KERN_ERR "block %u key %zi/%u: ", set, + (uint64_t *) k - i->d, i->keys); + + if (b->ops->key_dump) + b->ops->key_dump(b, k); + else + printk("%llu:%llu\n", KEY_INODE(k), KEY_OFFSET(k)); + + if (next < bset_bkey_last(i) && + bkey_cmp(k, b->ops->is_extents ? + &START_KEY(next) : next) > 0) + printk(KERN_ERR "Key skipped backwards\n"); + } +} + +void bch_dump_bucket(struct btree_keys *b) +{ + unsigned i; + + console_lock(); + for (i = 0; i <= b->nsets; i++) + bch_dump_bset(b, b->set[i].data, + bset_sector_offset(b, b->set[i].data)); + console_unlock(); +} + +int __bch_count_data(struct btree_keys *b) +{ + unsigned ret = 0; + struct btree_iter iter; + struct bkey *k; + + if (b->ops->is_extents) + for_each_key(b, k, &iter) + ret += KEY_SIZE(k); + return ret; +} + +void __bch_check_keys(struct btree_keys *b, const char *fmt, ...) +{ + va_list args; + struct bkey *k, *p = NULL; + struct btree_iter iter; + const char *err; + + for_each_key(b, k, &iter) { + if (b->ops->is_extents) { + err = "Keys out of order"; + if (p && bkey_cmp(&START_KEY(p), &START_KEY(k)) > 0) + goto bug; + + if (bch_ptr_invalid(b, k)) + continue; + + err = "Overlapping keys"; + if (p && bkey_cmp(p, &START_KEY(k)) > 0) + goto bug; + } else { + if (bch_ptr_bad(b, k)) + continue; + + err = "Duplicate keys"; + if (p && !bkey_cmp(p, k)) + goto bug; + } + p = k; + } +#if 0 + err = "Key larger than btree node key"; + if (p && bkey_cmp(p, &b->key) > 0) + goto bug; +#endif + return; +bug: + bch_dump_bucket(b); + + va_start(args, fmt); + vprintk(fmt, args); + va_end(args); + + panic("bch_check_keys error: %s:\n", err); +} + +static void bch_btree_iter_next_check(struct btree_iter *iter) +{ + struct bkey *k = iter->data->k, *next = bkey_next(k); + + if (next < iter->data->end && + bkey_cmp(k, iter->b->ops->is_extents ? + &START_KEY(next) : next) > 0) { + bch_dump_bucket(iter->b); + panic("Key skipped backwards\n"); + } +} + +#else + +static inline void bch_btree_iter_next_check(struct btree_iter *iter) {} + +#endif + /* Keylists */ int __bch_keylist_realloc(struct keylist *l, unsigned u64s) @@ -1045,7 +1155,7 @@ void bch_btree_sort_partial(struct btree *b, unsigned start, { size_t order = b->keys.page_order, keys = 0; struct btree_iter iter; - int oldsize = bch_count_data(b); + int oldsize = bch_count_data(&b->keys); __bch_btree_iter_init(&b->keys, &iter, NULL, &b->keys.set[start]); @@ -1063,7 +1173,8 @@ void bch_btree_sort_partial(struct btree *b, unsigned start, __btree_sort(&b->keys, &iter, start, order, false, state); - EBUG_ON(b->written && oldsize >= 0 && bch_count_data(b) != oldsize); + EBUG_ON(b->written && oldsize >= 0 && + bch_count_data(&b->keys) != oldsize); } EXPORT_SYMBOL(bch_btree_sort_partial); diff --git a/drivers/md/bcache/bset.h b/drivers/md/bcache/bset.h index 563130c..e01e69e 100644 --- a/drivers/md/bcache/bset.h +++ b/drivers/md/bcache/bset.h @@ -193,6 +193,8 @@ struct btree_keys_ops { bool (*key_bad)(struct btree_keys *, const struct bkey *); bool (*key_merge)(struct btree_keys *, struct bkey *, struct bkey *); + void (*key_to_text)(char *, size_t, const struct bkey *); + void (*key_dump)(struct btree_keys *, const struct bkey *); /* * Only used for deciding whether to use START_KEY(k) or just the key @@ -243,15 +245,6 @@ static inline unsigned bset_sector_offset(struct btree_keys *b, struct bset *i) return bset_byte_offset(b, i) >> 9; } -static inline bool btree_keys_expensive_checks(struct btree_keys *b) -{ -#ifdef CONFIG_BCACHE_DEBUG - return *b->expensive_debug_checks; -#else - return false; -#endif -} - #define __set_bytes(i, k) (sizeof(*(i)) + (k) * sizeof(uint64_t)) #define set_bytes(i) __set_bytes(i, i->keys) @@ -446,6 +439,12 @@ static inline bool bch_ptr_bad(struct btree_keys *b, const struct bkey *k) return b->ops->key_bad(b, k); } +static inline void bch_bkey_to_text(struct btree_keys *b, char *buf, + size_t size, const struct bkey *k) +{ + return b->ops->key_to_text(buf, size, k); +} + /* Keylists */ struct keylist { @@ -509,7 +508,42 @@ struct bkey *bch_keylist_pop(struct keylist *); void bch_keylist_pop_front(struct keylist *); int __bch_keylist_realloc(struct keylist *, unsigned); -struct cache_set; -const char *bch_ptr_status(struct cache_set *, const struct bkey *); +/* Debug stuff */ + +#ifdef CONFIG_BCACHE_DEBUG + +int __bch_count_data(struct btree_keys *); +void __bch_check_keys(struct btree_keys *, const char *, ...); +void bch_dump_bset(struct btree_keys *, struct bset *, unsigned); +void bch_dump_bucket(struct btree_keys *); + +#else + +static inline int __bch_count_data(struct btree_keys *b) { return -1; } +static inline void __bch_check_keys(struct btree_keys *b, const char *fmt, ...) {} +static inline void bch_dump_bucket(struct btree_keys *b) {} +void bch_dump_bset(struct btree_keys *, struct bset *, unsigned); + +#endif + +static inline bool btree_keys_expensive_checks(struct btree_keys *b) +{ +#ifdef CONFIG_BCACHE_DEBUG + return *b->expensive_debug_checks; +#else + return false; +#endif +} + +static inline int bch_count_data(struct btree_keys *b) +{ + return btree_keys_expensive_checks(b) ? __bch_count_data(b) : -1; +} + +#define bch_check_keys(b, ...) \ +do { \ + if (btree_keys_expensive_checks(b)) \ + __bch_check_keys(b, __VA_ARGS__); \ +} while (0) #endif diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c index 9424c8a..2128ee1 100644 --- a/drivers/md/bcache/btree.c +++ b/drivers/md/bcache/btree.c @@ -460,7 +460,7 @@ void bch_btree_node_write(struct btree *b, struct closure *parent) BUG_ON(b->written >= btree_blocks(b)); BUG_ON(b->written && !i->keys); BUG_ON(btree_bset_first(b)->seq != i->seq); - bch_check_keys(b, "writing"); + bch_check_keys(&b->keys, "writing"); cancel_delayed_work(&b->work); @@ -2007,7 +2007,7 @@ static bool btree_insert_key(struct btree *b, struct btree_op *op, insert: bch_bset_insert(&b->keys, m, k); copy: bkey_copy(m, k); merged: - bch_check_keys(b, "%u for %s", status, + bch_check_keys(&b->keys, "%u for %s", status, replace_key ? "replace" : "insert"); if (b->level && !KEY_OFFSET(k)) @@ -2036,7 +2036,7 @@ static bool bch_btree_insert_keys(struct btree *b, struct btree_op *op, struct bkey *replace_key) { bool ret = false; - int oldsize = bch_count_data(b); + int oldsize = bch_count_data(&b->keys); while (!bch_keylist_empty(insert_keys)) { struct bkey *k = insert_keys->keys; @@ -2066,7 +2066,7 @@ static bool bch_btree_insert_keys(struct btree *b, struct btree_op *op, BUG_ON(!bch_keylist_empty(insert_keys) && b->level); - BUG_ON(bch_count_data(b) < oldsize); + BUG_ON(bch_count_data(&b->keys) < oldsize); return ret; } diff --git a/drivers/md/bcache/debug.c b/drivers/md/bcache/debug.c index 3de27e2..8b1f1d5 100644 --- a/drivers/md/bcache/debug.c +++ b/drivers/md/bcache/debug.c @@ -8,6 +8,7 @@ #include "bcache.h" #include "btree.h" #include "debug.h" +#include "extents.h" #include #include @@ -17,108 +18,8 @@ static struct dentry *debug; -const char *bch_ptr_status(struct cache_set *c, const struct bkey *k) -{ - unsigned i; - - for (i = 0; i < KEY_PTRS(k); i++) - if (ptr_available(c, k, i)) { - struct cache *ca = PTR_CACHE(c, k, i); - size_t bucket = PTR_BUCKET_NR(c, k, i); - size_t r = bucket_remainder(c, PTR_OFFSET(k, i)); - - if (KEY_SIZE(k) + r > c->sb.bucket_size) - return "bad, length too big"; - if (bucket < ca->sb.first_bucket) - return "bad, short offset"; - if (bucket >= ca->sb.nbuckets) - return "bad, offset past end of device"; - if (ptr_stale(c, k, i)) - return "stale"; - } - - if (!bkey_cmp(k, &ZERO_KEY)) - return "bad, null key"; - if (!KEY_PTRS(k)) - return "bad, no pointers"; - if (!KEY_SIZE(k)) - return "zeroed key"; - return ""; -} - -int bch_bkey_to_text(char *buf, size_t size, const struct bkey *k) -{ - unsigned i = 0; - char *out = buf, *end = buf + size; - -#define p(...) (out += scnprintf(out, end - out, __VA_ARGS__)) - - p("%llu:%llu len %llu -> [", KEY_INODE(k), KEY_START(k), KEY_SIZE(k)); - - for (i = 0; i < KEY_PTRS(k); i++) { - if (i) - p(", "); - - if (PTR_DEV(k, i) == PTR_CHECK_DEV) - p("check dev"); - else - p("%llu:%llu gen %llu", PTR_DEV(k, i), - PTR_OFFSET(k, i), PTR_GEN(k, i)); - } - - p("]"); - - if (KEY_DIRTY(k)) - p(" dirty"); - if (KEY_CSUM(k)) - p(" cs%llu %llx", KEY_CSUM(k), k->ptr[1]); -#undef p - return out - buf; -} - #ifdef CONFIG_BCACHE_DEBUG -static void dump_bset(struct btree *b, struct bset *i, unsigned set) -{ - struct bkey *k, *next; - unsigned j; - char buf[80]; - - for (k = i->start; k < bset_bkey_last(i); k = next) { - next = bkey_next(k); - - bch_bkey_to_text(buf, sizeof(buf), k); - printk(KERN_ERR "b %u k %zi/%u: %s", set, - (uint64_t *) k - i->d, i->keys, buf); - - for (j = 0; j < KEY_PTRS(k); j++) { - size_t n = PTR_BUCKET_NR(b->c, k, j); - printk(" bucket %zu", n); - - if (n >= b->c->sb.first_bucket && n < b->c->sb.nbuckets) - printk(" prio %i", - PTR_BUCKET(b->c, k, j)->prio); - } - - printk(" %s\n", bch_ptr_status(b->c, k)); - - if (next < bset_bkey_last(i) && - bkey_cmp(k, !b->level ? &START_KEY(next) : next) > 0) - printk(KERN_ERR "Key skipped backwards\n"); - } -} - -static void bch_dump_bucket(struct btree *b) -{ - unsigned i; - - console_lock(); - for (i = 0; i <= b->keys.nsets; i++) - dump_bset(b, b->keys.set[i].data, - bset_block_offset(b, b->keys.set[i].data)); - console_unlock(); -} - #define for_each_written_bset(b, start, i) \ for (i = (start); \ (void *) i < (void *) (start) + (KEY_SIZE(&b->key) << 9) &&\ @@ -171,17 +72,17 @@ void bch_btree_verify(struct btree *b) console_lock(); printk(KERN_ERR "*** in memory:\n"); - dump_bset(b, inmemory, 0); + bch_dump_bset(&b->keys, inmemory, 0); printk(KERN_ERR "*** read back in:\n"); - dump_bset(v, sorted, 0); + bch_dump_bset(&v->keys, sorted, 0); for_each_written_bset(b, ondisk, i) { unsigned block = ((void *) i - (void *) ondisk) / block_bytes(b->c); printk(KERN_ERR "*** on disk block %u:\n", block); - dump_bset(b, i, block); + bch_dump_bset(&b->keys, i, block); } printk(KERN_ERR "*** block %zu not written\n", @@ -239,76 +140,6 @@ out_put: bio_put(check); } -int __bch_count_data(struct btree *b) -{ - unsigned ret = 0; - struct btree_iter iter; - struct bkey *k; - - if (!b->level) - for_each_key(&b->keys, k, &iter) - ret += KEY_SIZE(k); - return ret; -} - -void __bch_check_keys(struct btree *b, const char *fmt, ...) -{ - va_list args; - struct bkey *k, *p = NULL; - struct btree_iter iter; - const char *err; - - for_each_key(&b->keys, k, &iter) { - if (!b->level) { - err = "Keys out of order"; - if (p && bkey_cmp(&START_KEY(p), &START_KEY(k)) > 0) - goto bug; - - if (bch_ptr_invalid(&b->keys, k)) - continue; - - err = "Overlapping keys"; - if (p && bkey_cmp(p, &START_KEY(k)) > 0) - goto bug; - } else { - if (bch_ptr_bad(&b->keys, k)) - continue; - - err = "Duplicate keys"; - if (p && !bkey_cmp(p, k)) - goto bug; - } - p = k; - } - - err = "Key larger than btree node key"; - if (p && bkey_cmp(p, &b->key) > 0) - goto bug; - - return; -bug: - bch_dump_bucket(b); - - va_start(args, fmt); - vprintk(fmt, args); - va_end(args); - - panic("bcache error: %s:\n", err); -} - -void bch_btree_iter_next_check(struct btree_iter *iter) -{ -#if 0 - struct bkey *k = iter->data->k, *next = bkey_next(k); - - if (next < iter->data->end && - bkey_cmp(k, iter->b->level ? next : &START_KEY(next)) > 0) { - bch_dump_bucket(iter->b); - panic("Key skipped backwards\n"); - } -#endif -} - #endif #ifdef CONFIG_DEBUG_FS @@ -355,7 +186,7 @@ static ssize_t bch_dump_read(struct file *file, char __user *buf, if (!w) break; - bch_bkey_to_text(kbuf, sizeof(kbuf), &w->key); + bch_extent_to_text(kbuf, sizeof(kbuf), &w->key); i->bytes = snprintf(i->buf, PAGE_SIZE, "%s\n", kbuf); bch_keybuf_del(&i->keys, w); } diff --git a/drivers/md/bcache/debug.h b/drivers/md/bcache/debug.h index 08e116e..1f63c19 100644 --- a/drivers/md/bcache/debug.h +++ b/drivers/md/bcache/debug.h @@ -1,19 +1,15 @@ #ifndef _BCACHE_DEBUG_H #define _BCACHE_DEBUG_H -/* Btree/bkey debug printing */ - -int bch_bkey_to_text(char *buf, size_t size, const struct bkey *k); +struct bio; +struct cached_dev; +struct cache_set; #ifdef CONFIG_BCACHE_DEBUG void bch_btree_verify(struct btree *); void bch_data_verify(struct cached_dev *, struct bio *); -int __bch_count_data(struct btree *); -void __bch_check_keys(struct btree *, const char *, ...); -void bch_btree_iter_next_check(struct btree_iter *); -#define EBUG_ON(cond) BUG_ON(cond) #define expensive_debug_checks(c) ((c)->expensive_debug_checks) #define key_merging_disabled(c) ((c)->key_merging_disabled) #define bypass_torture_test(d) ((d)->bypass_torture_test) @@ -22,26 +18,13 @@ void bch_btree_iter_next_check(struct btree_iter *); static inline void bch_btree_verify(struct btree *b) {} static inline void bch_data_verify(struct cached_dev *dc, struct bio *bio) {} -static inline int __bch_count_data(struct btree *b) { return -1; } -static inline void __bch_check_keys(struct btree *b, const char *fmt, ...) {} -static inline void bch_btree_iter_next_check(struct btree_iter *iter) {} -#define EBUG_ON(cond) do { if (cond); } while (0) #define expensive_debug_checks(c) 0 #define key_merging_disabled(c) 0 #define bypass_torture_test(d) 0 #endif -#define bch_count_data(b) \ - (expensive_debug_checks((b)->c) ? __bch_count_data(b) : -1) - -#define bch_check_keys(b, ...) \ -do { \ - if (expensive_debug_checks((b)->c)) \ - __bch_check_keys(b, __VA_ARGS__); \ -} while (0) - #ifdef CONFIG_DEBUG_FS void bch_debug_init_cache_set(struct cache_set *); #else diff --git a/drivers/md/bcache/extents.c b/drivers/md/bcache/extents.c index ba30211..bc1c3ee 100644 --- a/drivers/md/bcache/extents.c +++ b/drivers/md/bcache/extents.c @@ -62,6 +62,87 @@ static bool __ptr_invalid(struct cache_set *c, const struct bkey *k) return false; } +/* Common among btree and extent ptrs */ + +static const char *bch_ptr_status(struct cache_set *c, const struct bkey *k) +{ + unsigned i; + + for (i = 0; i < KEY_PTRS(k); i++) + if (ptr_available(c, k, i)) { + struct cache *ca = PTR_CACHE(c, k, i); + size_t bucket = PTR_BUCKET_NR(c, k, i); + size_t r = bucket_remainder(c, PTR_OFFSET(k, i)); + + if (KEY_SIZE(k) + r > c->sb.bucket_size) + return "bad, length too big"; + if (bucket < ca->sb.first_bucket) + return "bad, short offset"; + if (bucket >= ca->sb.nbuckets) + return "bad, offset past end of device"; + if (ptr_stale(c, k, i)) + return "stale"; + } + + if (!bkey_cmp(k, &ZERO_KEY)) + return "bad, null key"; + if (!KEY_PTRS(k)) + return "bad, no pointers"; + if (!KEY_SIZE(k)) + return "zeroed key"; + return ""; +} + +void bch_extent_to_text(char *buf, size_t size, const struct bkey *k) +{ + unsigned i = 0; + char *out = buf, *end = buf + size; + +#define p(...) (out += scnprintf(out, end - out, __VA_ARGS__)) + + p("%llu:%llu len %llu -> [", KEY_INODE(k), KEY_START(k), KEY_SIZE(k)); + + for (i = 0; i < KEY_PTRS(k); i++) { + if (i) + p(", "); + + if (PTR_DEV(k, i) == PTR_CHECK_DEV) + p("check dev"); + else + p("%llu:%llu gen %llu", PTR_DEV(k, i), + PTR_OFFSET(k, i), PTR_GEN(k, i)); + } + + p("]"); + + if (KEY_DIRTY(k)) + p(" dirty"); + if (KEY_CSUM(k)) + p(" cs%llu %llx", KEY_CSUM(k), k->ptr[1]); +#undef p +} + +static void bch_bkey_dump(struct btree_keys *keys, const struct bkey *k) +{ + struct btree *b = container_of(keys, struct btree, keys); + unsigned j; + char buf[80]; + + bch_extent_to_text(buf, sizeof(buf), k); + printk(" %s", buf); + + for (j = 0; j < KEY_PTRS(k); j++) { + size_t n = PTR_BUCKET_NR(b->c, k, j); + printk(" bucket %zu", n); + + if (n >= b->c->sb.first_bucket && n < b->c->sb.nbuckets) + printk(" prio %i", + PTR_BUCKET(b->c, k, j)->prio); + } + + printk(" %s\n", bch_ptr_status(b->c, k)); +} + /* Btree ptrs */ bool __bch_btree_ptr_invalid(struct cache_set *c, const struct bkey *k) @@ -76,7 +157,7 @@ bool __bch_btree_ptr_invalid(struct cache_set *c, const struct bkey *k) return false; bad: - bch_bkey_to_text(buf, sizeof(buf), k); + bch_extent_to_text(buf, sizeof(buf), k); cache_bug(c, "spotted btree ptr %s: %s", buf, bch_ptr_status(c, k)); return true; } @@ -111,7 +192,7 @@ static bool btree_ptr_bad_expensive(struct btree *b, const struct bkey *k) return false; err: mutex_unlock(&b->c->bucket_lock); - bch_bkey_to_text(buf, sizeof(buf), k); + bch_extent_to_text(buf, sizeof(buf), k); btree_bug(b, "inconsistent btree pointer %s: bucket %li pin %i prio %i gen %i last_gc %i mark %llu gc_gen %i", buf, PTR_BUCKET_NR(b->c, k, i), atomic_read(&g->pin), @@ -145,6 +226,8 @@ const struct btree_keys_ops bch_btree_keys_ops = { .sort_cmp = bch_key_sort_cmp, .key_invalid = bch_btree_ptr_invalid, .key_bad = bch_btree_ptr_bad, + .key_to_text = bch_extent_to_text, + .key_dump = bch_bkey_dump, }; /* Extents */ @@ -227,7 +310,7 @@ static bool bch_extent_invalid(struct btree_keys *bk, const struct bkey *k) return false; bad: - bch_bkey_to_text(buf, sizeof(buf), k); + bch_extent_to_text(buf, sizeof(buf), k); cache_bug(b->c, "spotted extent %s: %s", buf, bch_ptr_status(b->c, k)); return true; } @@ -254,7 +337,7 @@ static bool bch_extent_bad_expensive(struct btree *b, const struct bkey *k, return false; err: mutex_unlock(&b->c->bucket_lock); - bch_bkey_to_text(buf, sizeof(buf), k); + bch_extent_to_text(buf, sizeof(buf), k); btree_bug(b, "inconsistent extent pointer %s:\nbucket %zu pin %i prio %i gen %i last_gc %i mark %llu gc_gen %i", buf, PTR_BUCKET_NR(b->c, k, ptr), atomic_read(&g->pin), @@ -355,5 +438,7 @@ const struct btree_keys_ops bch_extent_keys_ops = { .key_invalid = bch_extent_invalid, .key_bad = bch_extent_bad, .key_merge = bch_extent_merge, + .key_to_text = bch_extent_to_text, + .key_dump = bch_bkey_dump, .is_extents = true, }; diff --git a/drivers/md/bcache/extents.h b/drivers/md/bcache/extents.h index e0c0b68..e4e2340 100644 --- a/drivers/md/bcache/extents.h +++ b/drivers/md/bcache/extents.h @@ -7,6 +7,7 @@ extern const struct btree_keys_ops bch_extent_keys_ops; struct bkey; struct cache_set; +void bch_extent_to_text(char *, size_t, const struct bkey *); bool __bch_btree_ptr_invalid(struct cache_set *, const struct bkey *); #endif /* _BCACHE_EXTENTS_H */ diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index 6d6a7a1..24a3a15 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -384,7 +384,7 @@ static void uuid_io(struct cache_set *c, unsigned long rw, break; } - bch_bkey_to_text(buf, sizeof(buf), k); + bch_extent_to_text(buf, sizeof(buf), k); pr_debug("%s UUIDs at %s", rw & REQ_WRITE ? "wrote" : "read", buf); for (u = c->uuids; u < c->uuids + c->nr_uuids; u++) diff --git a/drivers/md/bcache/util.h b/drivers/md/bcache/util.h index 3ebaef5..ac7d0d1 100644 --- a/drivers/md/bcache/util.h +++ b/drivers/md/bcache/util.h @@ -18,11 +18,13 @@ struct closure; #ifdef CONFIG_BCACHE_DEBUG +#define EBUG_ON(cond) BUG_ON(cond) #define atomic_dec_bug(v) BUG_ON(atomic_dec_return(v) < 0) #define atomic_inc_bug(v, i) BUG_ON(atomic_inc_return(v) <= i) #else /* DEBUG */ +#define EBUG_ON(cond) do { if (cond); } while (0) #define atomic_dec_bug(v) atomic_dec(v) #define atomic_inc_bug(v, i) atomic_inc(v) -- 2.7.4