1*cafe5635SKent Overstreet /* 2*cafe5635SKent Overstreet * Assorted bcache debug code 3*cafe5635SKent Overstreet * 4*cafe5635SKent Overstreet * Copyright 2010, 2011 Kent Overstreet <kent.overstreet@gmail.com> 5*cafe5635SKent Overstreet * Copyright 2012 Google, Inc. 6*cafe5635SKent Overstreet */ 7*cafe5635SKent Overstreet 8*cafe5635SKent Overstreet #include "bcache.h" 9*cafe5635SKent Overstreet #include "btree.h" 10*cafe5635SKent Overstreet #include "debug.h" 11*cafe5635SKent Overstreet #include "request.h" 12*cafe5635SKent Overstreet 13*cafe5635SKent Overstreet #include <linux/console.h> 14*cafe5635SKent Overstreet #include <linux/debugfs.h> 15*cafe5635SKent Overstreet #include <linux/module.h> 16*cafe5635SKent Overstreet #include <linux/random.h> 17*cafe5635SKent Overstreet #include <linux/seq_file.h> 18*cafe5635SKent Overstreet 19*cafe5635SKent Overstreet static struct dentry *debug; 20*cafe5635SKent Overstreet 21*cafe5635SKent Overstreet const char *bch_ptr_status(struct cache_set *c, const struct bkey *k) 22*cafe5635SKent Overstreet { 23*cafe5635SKent Overstreet unsigned i; 24*cafe5635SKent Overstreet 25*cafe5635SKent Overstreet for (i = 0; i < KEY_PTRS(k); i++) 26*cafe5635SKent Overstreet if (ptr_available(c, k, i)) { 27*cafe5635SKent Overstreet struct cache *ca = PTR_CACHE(c, k, i); 28*cafe5635SKent Overstreet size_t bucket = PTR_BUCKET_NR(c, k, i); 29*cafe5635SKent Overstreet size_t r = bucket_remainder(c, PTR_OFFSET(k, i)); 30*cafe5635SKent Overstreet 31*cafe5635SKent Overstreet if (KEY_SIZE(k) + r > c->sb.bucket_size) 32*cafe5635SKent Overstreet return "bad, length too big"; 33*cafe5635SKent Overstreet if (bucket < ca->sb.first_bucket) 34*cafe5635SKent Overstreet return "bad, short offset"; 35*cafe5635SKent Overstreet if (bucket >= ca->sb.nbuckets) 36*cafe5635SKent Overstreet return "bad, offset past end of device"; 37*cafe5635SKent Overstreet if (ptr_stale(c, k, i)) 38*cafe5635SKent Overstreet return "stale"; 39*cafe5635SKent Overstreet } 40*cafe5635SKent Overstreet 41*cafe5635SKent Overstreet if (!bkey_cmp(k, &ZERO_KEY)) 42*cafe5635SKent Overstreet return "bad, null key"; 43*cafe5635SKent Overstreet if (!KEY_PTRS(k)) 44*cafe5635SKent Overstreet return "bad, no pointers"; 45*cafe5635SKent Overstreet if (!KEY_SIZE(k)) 46*cafe5635SKent Overstreet return "zeroed key"; 47*cafe5635SKent Overstreet return ""; 48*cafe5635SKent Overstreet } 49*cafe5635SKent Overstreet 50*cafe5635SKent Overstreet struct keyprint_hack bch_pkey(const struct bkey *k) 51*cafe5635SKent Overstreet { 52*cafe5635SKent Overstreet unsigned i = 0; 53*cafe5635SKent Overstreet struct keyprint_hack r; 54*cafe5635SKent Overstreet char *out = r.s, *end = r.s + KEYHACK_SIZE; 55*cafe5635SKent Overstreet 56*cafe5635SKent Overstreet #define p(...) (out += scnprintf(out, end - out, __VA_ARGS__)) 57*cafe5635SKent Overstreet 58*cafe5635SKent Overstreet p("%llu:%llu len %llu -> [", KEY_INODE(k), KEY_OFFSET(k), KEY_SIZE(k)); 59*cafe5635SKent Overstreet 60*cafe5635SKent Overstreet if (KEY_PTRS(k)) 61*cafe5635SKent Overstreet while (1) { 62*cafe5635SKent Overstreet p("%llu:%llu gen %llu", 63*cafe5635SKent Overstreet PTR_DEV(k, i), PTR_OFFSET(k, i), PTR_GEN(k, i)); 64*cafe5635SKent Overstreet 65*cafe5635SKent Overstreet if (++i == KEY_PTRS(k)) 66*cafe5635SKent Overstreet break; 67*cafe5635SKent Overstreet 68*cafe5635SKent Overstreet p(", "); 69*cafe5635SKent Overstreet } 70*cafe5635SKent Overstreet 71*cafe5635SKent Overstreet p("]"); 72*cafe5635SKent Overstreet 73*cafe5635SKent Overstreet if (KEY_DIRTY(k)) 74*cafe5635SKent Overstreet p(" dirty"); 75*cafe5635SKent Overstreet if (KEY_CSUM(k)) 76*cafe5635SKent Overstreet p(" cs%llu %llx", KEY_CSUM(k), k->ptr[1]); 77*cafe5635SKent Overstreet #undef p 78*cafe5635SKent Overstreet return r; 79*cafe5635SKent Overstreet } 80*cafe5635SKent Overstreet 81*cafe5635SKent Overstreet struct keyprint_hack bch_pbtree(const struct btree *b) 82*cafe5635SKent Overstreet { 83*cafe5635SKent Overstreet struct keyprint_hack r; 84*cafe5635SKent Overstreet 85*cafe5635SKent Overstreet snprintf(r.s, 40, "%li level %i/%i", PTR_BUCKET_NR(b->c, &b->key, 0), 86*cafe5635SKent Overstreet b->level, b->c->root ? b->c->root->level : -1); 87*cafe5635SKent Overstreet return r; 88*cafe5635SKent Overstreet } 89*cafe5635SKent Overstreet 90*cafe5635SKent Overstreet #if defined(CONFIG_BCACHE_DEBUG) || defined(CONFIG_BCACHE_EDEBUG) 91*cafe5635SKent Overstreet 92*cafe5635SKent Overstreet static bool skipped_backwards(struct btree *b, struct bkey *k) 93*cafe5635SKent Overstreet { 94*cafe5635SKent Overstreet return bkey_cmp(k, (!b->level) 95*cafe5635SKent Overstreet ? &START_KEY(bkey_next(k)) 96*cafe5635SKent Overstreet : bkey_next(k)) > 0; 97*cafe5635SKent Overstreet } 98*cafe5635SKent Overstreet 99*cafe5635SKent Overstreet static void dump_bset(struct btree *b, struct bset *i) 100*cafe5635SKent Overstreet { 101*cafe5635SKent Overstreet struct bkey *k; 102*cafe5635SKent Overstreet unsigned j; 103*cafe5635SKent Overstreet 104*cafe5635SKent Overstreet for (k = i->start; k < end(i); k = bkey_next(k)) { 105*cafe5635SKent Overstreet printk(KERN_ERR "block %zu key %zi/%u: %s", index(i, b), 106*cafe5635SKent Overstreet (uint64_t *) k - i->d, i->keys, pkey(k)); 107*cafe5635SKent Overstreet 108*cafe5635SKent Overstreet for (j = 0; j < KEY_PTRS(k); j++) { 109*cafe5635SKent Overstreet size_t n = PTR_BUCKET_NR(b->c, k, j); 110*cafe5635SKent Overstreet printk(" bucket %zu", n); 111*cafe5635SKent Overstreet 112*cafe5635SKent Overstreet if (n >= b->c->sb.first_bucket && n < b->c->sb.nbuckets) 113*cafe5635SKent Overstreet printk(" prio %i", 114*cafe5635SKent Overstreet PTR_BUCKET(b->c, k, j)->prio); 115*cafe5635SKent Overstreet } 116*cafe5635SKent Overstreet 117*cafe5635SKent Overstreet printk(" %s\n", bch_ptr_status(b->c, k)); 118*cafe5635SKent Overstreet 119*cafe5635SKent Overstreet if (bkey_next(k) < end(i) && 120*cafe5635SKent Overstreet skipped_backwards(b, k)) 121*cafe5635SKent Overstreet printk(KERN_ERR "Key skipped backwards\n"); 122*cafe5635SKent Overstreet } 123*cafe5635SKent Overstreet } 124*cafe5635SKent Overstreet 125*cafe5635SKent Overstreet #endif 126*cafe5635SKent Overstreet 127*cafe5635SKent Overstreet #ifdef CONFIG_BCACHE_DEBUG 128*cafe5635SKent Overstreet 129*cafe5635SKent Overstreet void bch_btree_verify(struct btree *b, struct bset *new) 130*cafe5635SKent Overstreet { 131*cafe5635SKent Overstreet struct btree *v = b->c->verify_data; 132*cafe5635SKent Overstreet struct closure cl; 133*cafe5635SKent Overstreet closure_init_stack(&cl); 134*cafe5635SKent Overstreet 135*cafe5635SKent Overstreet if (!b->c->verify) 136*cafe5635SKent Overstreet return; 137*cafe5635SKent Overstreet 138*cafe5635SKent Overstreet closure_wait_event(&b->io.wait, &cl, 139*cafe5635SKent Overstreet atomic_read(&b->io.cl.remaining) == -1); 140*cafe5635SKent Overstreet 141*cafe5635SKent Overstreet mutex_lock(&b->c->verify_lock); 142*cafe5635SKent Overstreet 143*cafe5635SKent Overstreet bkey_copy(&v->key, &b->key); 144*cafe5635SKent Overstreet v->written = 0; 145*cafe5635SKent Overstreet v->level = b->level; 146*cafe5635SKent Overstreet 147*cafe5635SKent Overstreet bch_btree_read(v); 148*cafe5635SKent Overstreet closure_wait_event(&v->io.wait, &cl, 149*cafe5635SKent Overstreet atomic_read(&b->io.cl.remaining) == -1); 150*cafe5635SKent Overstreet 151*cafe5635SKent Overstreet if (new->keys != v->sets[0].data->keys || 152*cafe5635SKent Overstreet memcmp(new->start, 153*cafe5635SKent Overstreet v->sets[0].data->start, 154*cafe5635SKent Overstreet (void *) end(new) - (void *) new->start)) { 155*cafe5635SKent Overstreet unsigned i, j; 156*cafe5635SKent Overstreet 157*cafe5635SKent Overstreet console_lock(); 158*cafe5635SKent Overstreet 159*cafe5635SKent Overstreet printk(KERN_ERR "*** original memory node:\n"); 160*cafe5635SKent Overstreet for (i = 0; i <= b->nsets; i++) 161*cafe5635SKent Overstreet dump_bset(b, b->sets[i].data); 162*cafe5635SKent Overstreet 163*cafe5635SKent Overstreet printk(KERN_ERR "*** sorted memory node:\n"); 164*cafe5635SKent Overstreet dump_bset(b, new); 165*cafe5635SKent Overstreet 166*cafe5635SKent Overstreet printk(KERN_ERR "*** on disk node:\n"); 167*cafe5635SKent Overstreet dump_bset(v, v->sets[0].data); 168*cafe5635SKent Overstreet 169*cafe5635SKent Overstreet for (j = 0; j < new->keys; j++) 170*cafe5635SKent Overstreet if (new->d[j] != v->sets[0].data->d[j]) 171*cafe5635SKent Overstreet break; 172*cafe5635SKent Overstreet 173*cafe5635SKent Overstreet console_unlock(); 174*cafe5635SKent Overstreet panic("verify failed at %u\n", j); 175*cafe5635SKent Overstreet } 176*cafe5635SKent Overstreet 177*cafe5635SKent Overstreet mutex_unlock(&b->c->verify_lock); 178*cafe5635SKent Overstreet } 179*cafe5635SKent Overstreet 180*cafe5635SKent Overstreet static void data_verify_endio(struct bio *bio, int error) 181*cafe5635SKent Overstreet { 182*cafe5635SKent Overstreet struct closure *cl = bio->bi_private; 183*cafe5635SKent Overstreet closure_put(cl); 184*cafe5635SKent Overstreet } 185*cafe5635SKent Overstreet 186*cafe5635SKent Overstreet void bch_data_verify(struct search *s) 187*cafe5635SKent Overstreet { 188*cafe5635SKent Overstreet char name[BDEVNAME_SIZE]; 189*cafe5635SKent Overstreet struct cached_dev *dc = container_of(s->d, struct cached_dev, disk); 190*cafe5635SKent Overstreet struct closure *cl = &s->cl; 191*cafe5635SKent Overstreet struct bio *check; 192*cafe5635SKent Overstreet struct bio_vec *bv; 193*cafe5635SKent Overstreet int i; 194*cafe5635SKent Overstreet 195*cafe5635SKent Overstreet if (!s->unaligned_bvec) 196*cafe5635SKent Overstreet bio_for_each_segment(bv, s->orig_bio, i) 197*cafe5635SKent Overstreet bv->bv_offset = 0, bv->bv_len = PAGE_SIZE; 198*cafe5635SKent Overstreet 199*cafe5635SKent Overstreet check = bio_clone(s->orig_bio, GFP_NOIO); 200*cafe5635SKent Overstreet if (!check) 201*cafe5635SKent Overstreet return; 202*cafe5635SKent Overstreet 203*cafe5635SKent Overstreet if (bio_alloc_pages(check, GFP_NOIO)) 204*cafe5635SKent Overstreet goto out_put; 205*cafe5635SKent Overstreet 206*cafe5635SKent Overstreet check->bi_rw = READ_SYNC; 207*cafe5635SKent Overstreet check->bi_private = cl; 208*cafe5635SKent Overstreet check->bi_end_io = data_verify_endio; 209*cafe5635SKent Overstreet 210*cafe5635SKent Overstreet closure_bio_submit(check, cl, &dc->disk); 211*cafe5635SKent Overstreet closure_sync(cl); 212*cafe5635SKent Overstreet 213*cafe5635SKent Overstreet bio_for_each_segment(bv, s->orig_bio, i) { 214*cafe5635SKent Overstreet void *p1 = kmap(bv->bv_page); 215*cafe5635SKent Overstreet void *p2 = kmap(check->bi_io_vec[i].bv_page); 216*cafe5635SKent Overstreet 217*cafe5635SKent Overstreet if (memcmp(p1 + bv->bv_offset, 218*cafe5635SKent Overstreet p2 + bv->bv_offset, 219*cafe5635SKent Overstreet bv->bv_len)) 220*cafe5635SKent Overstreet printk(KERN_ERR "bcache (%s): verify failed" 221*cafe5635SKent Overstreet " at sector %llu\n", 222*cafe5635SKent Overstreet bdevname(dc->bdev, name), 223*cafe5635SKent Overstreet (uint64_t) s->orig_bio->bi_sector); 224*cafe5635SKent Overstreet 225*cafe5635SKent Overstreet kunmap(bv->bv_page); 226*cafe5635SKent Overstreet kunmap(check->bi_io_vec[i].bv_page); 227*cafe5635SKent Overstreet } 228*cafe5635SKent Overstreet 229*cafe5635SKent Overstreet __bio_for_each_segment(bv, check, i, 0) 230*cafe5635SKent Overstreet __free_page(bv->bv_page); 231*cafe5635SKent Overstreet out_put: 232*cafe5635SKent Overstreet bio_put(check); 233*cafe5635SKent Overstreet } 234*cafe5635SKent Overstreet 235*cafe5635SKent Overstreet #endif 236*cafe5635SKent Overstreet 237*cafe5635SKent Overstreet #ifdef CONFIG_BCACHE_EDEBUG 238*cafe5635SKent Overstreet 239*cafe5635SKent Overstreet unsigned bch_count_data(struct btree *b) 240*cafe5635SKent Overstreet { 241*cafe5635SKent Overstreet unsigned ret = 0; 242*cafe5635SKent Overstreet struct btree_iter iter; 243*cafe5635SKent Overstreet struct bkey *k; 244*cafe5635SKent Overstreet 245*cafe5635SKent Overstreet if (!b->level) 246*cafe5635SKent Overstreet for_each_key(b, k, &iter) 247*cafe5635SKent Overstreet ret += KEY_SIZE(k); 248*cafe5635SKent Overstreet return ret; 249*cafe5635SKent Overstreet } 250*cafe5635SKent Overstreet 251*cafe5635SKent Overstreet static void vdump_bucket_and_panic(struct btree *b, const char *fmt, 252*cafe5635SKent Overstreet va_list args) 253*cafe5635SKent Overstreet { 254*cafe5635SKent Overstreet unsigned i; 255*cafe5635SKent Overstreet 256*cafe5635SKent Overstreet console_lock(); 257*cafe5635SKent Overstreet 258*cafe5635SKent Overstreet for (i = 0; i <= b->nsets; i++) 259*cafe5635SKent Overstreet dump_bset(b, b->sets[i].data); 260*cafe5635SKent Overstreet 261*cafe5635SKent Overstreet vprintk(fmt, args); 262*cafe5635SKent Overstreet 263*cafe5635SKent Overstreet console_unlock(); 264*cafe5635SKent Overstreet 265*cafe5635SKent Overstreet panic("at %s\n", pbtree(b)); 266*cafe5635SKent Overstreet } 267*cafe5635SKent Overstreet 268*cafe5635SKent Overstreet void bch_check_key_order_msg(struct btree *b, struct bset *i, 269*cafe5635SKent Overstreet const char *fmt, ...) 270*cafe5635SKent Overstreet { 271*cafe5635SKent Overstreet struct bkey *k; 272*cafe5635SKent Overstreet 273*cafe5635SKent Overstreet if (!i->keys) 274*cafe5635SKent Overstreet return; 275*cafe5635SKent Overstreet 276*cafe5635SKent Overstreet for (k = i->start; bkey_next(k) < end(i); k = bkey_next(k)) 277*cafe5635SKent Overstreet if (skipped_backwards(b, k)) { 278*cafe5635SKent Overstreet va_list args; 279*cafe5635SKent Overstreet va_start(args, fmt); 280*cafe5635SKent Overstreet 281*cafe5635SKent Overstreet vdump_bucket_and_panic(b, fmt, args); 282*cafe5635SKent Overstreet va_end(args); 283*cafe5635SKent Overstreet } 284*cafe5635SKent Overstreet } 285*cafe5635SKent Overstreet 286*cafe5635SKent Overstreet void bch_check_keys(struct btree *b, const char *fmt, ...) 287*cafe5635SKent Overstreet { 288*cafe5635SKent Overstreet va_list args; 289*cafe5635SKent Overstreet struct bkey *k, *p = NULL; 290*cafe5635SKent Overstreet struct btree_iter iter; 291*cafe5635SKent Overstreet 292*cafe5635SKent Overstreet if (b->level) 293*cafe5635SKent Overstreet return; 294*cafe5635SKent Overstreet 295*cafe5635SKent Overstreet for_each_key(b, k, &iter) { 296*cafe5635SKent Overstreet if (p && bkey_cmp(&START_KEY(p), &START_KEY(k)) > 0) { 297*cafe5635SKent Overstreet printk(KERN_ERR "Keys out of order:\n"); 298*cafe5635SKent Overstreet goto bug; 299*cafe5635SKent Overstreet } 300*cafe5635SKent Overstreet 301*cafe5635SKent Overstreet if (bch_ptr_invalid(b, k)) 302*cafe5635SKent Overstreet continue; 303*cafe5635SKent Overstreet 304*cafe5635SKent Overstreet if (p && bkey_cmp(p, &START_KEY(k)) > 0) { 305*cafe5635SKent Overstreet printk(KERN_ERR "Overlapping keys:\n"); 306*cafe5635SKent Overstreet goto bug; 307*cafe5635SKent Overstreet } 308*cafe5635SKent Overstreet p = k; 309*cafe5635SKent Overstreet } 310*cafe5635SKent Overstreet return; 311*cafe5635SKent Overstreet bug: 312*cafe5635SKent Overstreet va_start(args, fmt); 313*cafe5635SKent Overstreet vdump_bucket_and_panic(b, fmt, args); 314*cafe5635SKent Overstreet va_end(args); 315*cafe5635SKent Overstreet } 316*cafe5635SKent Overstreet 317*cafe5635SKent Overstreet #endif 318*cafe5635SKent Overstreet 319*cafe5635SKent Overstreet #ifdef CONFIG_DEBUG_FS 320*cafe5635SKent Overstreet 321*cafe5635SKent Overstreet /* XXX: cache set refcounting */ 322*cafe5635SKent Overstreet 323*cafe5635SKent Overstreet struct dump_iterator { 324*cafe5635SKent Overstreet char buf[PAGE_SIZE]; 325*cafe5635SKent Overstreet size_t bytes; 326*cafe5635SKent Overstreet struct cache_set *c; 327*cafe5635SKent Overstreet struct keybuf keys; 328*cafe5635SKent Overstreet }; 329*cafe5635SKent Overstreet 330*cafe5635SKent Overstreet static bool dump_pred(struct keybuf *buf, struct bkey *k) 331*cafe5635SKent Overstreet { 332*cafe5635SKent Overstreet return true; 333*cafe5635SKent Overstreet } 334*cafe5635SKent Overstreet 335*cafe5635SKent Overstreet static ssize_t bch_dump_read(struct file *file, char __user *buf, 336*cafe5635SKent Overstreet size_t size, loff_t *ppos) 337*cafe5635SKent Overstreet { 338*cafe5635SKent Overstreet struct dump_iterator *i = file->private_data; 339*cafe5635SKent Overstreet ssize_t ret = 0; 340*cafe5635SKent Overstreet 341*cafe5635SKent Overstreet while (size) { 342*cafe5635SKent Overstreet struct keybuf_key *w; 343*cafe5635SKent Overstreet unsigned bytes = min(i->bytes, size); 344*cafe5635SKent Overstreet 345*cafe5635SKent Overstreet int err = copy_to_user(buf, i->buf, bytes); 346*cafe5635SKent Overstreet if (err) 347*cafe5635SKent Overstreet return err; 348*cafe5635SKent Overstreet 349*cafe5635SKent Overstreet ret += bytes; 350*cafe5635SKent Overstreet buf += bytes; 351*cafe5635SKent Overstreet size -= bytes; 352*cafe5635SKent Overstreet i->bytes -= bytes; 353*cafe5635SKent Overstreet memmove(i->buf, i->buf + bytes, i->bytes); 354*cafe5635SKent Overstreet 355*cafe5635SKent Overstreet if (i->bytes) 356*cafe5635SKent Overstreet break; 357*cafe5635SKent Overstreet 358*cafe5635SKent Overstreet w = bch_keybuf_next_rescan(i->c, &i->keys, &MAX_KEY); 359*cafe5635SKent Overstreet if (!w) 360*cafe5635SKent Overstreet break; 361*cafe5635SKent Overstreet 362*cafe5635SKent Overstreet i->bytes = snprintf(i->buf, PAGE_SIZE, "%s\n", pkey(&w->key)); 363*cafe5635SKent Overstreet bch_keybuf_del(&i->keys, w); 364*cafe5635SKent Overstreet } 365*cafe5635SKent Overstreet 366*cafe5635SKent Overstreet return ret; 367*cafe5635SKent Overstreet } 368*cafe5635SKent Overstreet 369*cafe5635SKent Overstreet static int bch_dump_open(struct inode *inode, struct file *file) 370*cafe5635SKent Overstreet { 371*cafe5635SKent Overstreet struct cache_set *c = inode->i_private; 372*cafe5635SKent Overstreet struct dump_iterator *i; 373*cafe5635SKent Overstreet 374*cafe5635SKent Overstreet i = kzalloc(sizeof(struct dump_iterator), GFP_KERNEL); 375*cafe5635SKent Overstreet if (!i) 376*cafe5635SKent Overstreet return -ENOMEM; 377*cafe5635SKent Overstreet 378*cafe5635SKent Overstreet file->private_data = i; 379*cafe5635SKent Overstreet i->c = c; 380*cafe5635SKent Overstreet bch_keybuf_init(&i->keys, dump_pred); 381*cafe5635SKent Overstreet i->keys.last_scanned = KEY(0, 0, 0); 382*cafe5635SKent Overstreet 383*cafe5635SKent Overstreet return 0; 384*cafe5635SKent Overstreet } 385*cafe5635SKent Overstreet 386*cafe5635SKent Overstreet static int bch_dump_release(struct inode *inode, struct file *file) 387*cafe5635SKent Overstreet { 388*cafe5635SKent Overstreet kfree(file->private_data); 389*cafe5635SKent Overstreet return 0; 390*cafe5635SKent Overstreet } 391*cafe5635SKent Overstreet 392*cafe5635SKent Overstreet static const struct file_operations cache_set_debug_ops = { 393*cafe5635SKent Overstreet .owner = THIS_MODULE, 394*cafe5635SKent Overstreet .open = bch_dump_open, 395*cafe5635SKent Overstreet .read = bch_dump_read, 396*cafe5635SKent Overstreet .release = bch_dump_release 397*cafe5635SKent Overstreet }; 398*cafe5635SKent Overstreet 399*cafe5635SKent Overstreet void bch_debug_init_cache_set(struct cache_set *c) 400*cafe5635SKent Overstreet { 401*cafe5635SKent Overstreet if (!IS_ERR_OR_NULL(debug)) { 402*cafe5635SKent Overstreet char name[50]; 403*cafe5635SKent Overstreet snprintf(name, 50, "bcache-%pU", c->sb.set_uuid); 404*cafe5635SKent Overstreet 405*cafe5635SKent Overstreet c->debug = debugfs_create_file(name, 0400, debug, c, 406*cafe5635SKent Overstreet &cache_set_debug_ops); 407*cafe5635SKent Overstreet } 408*cafe5635SKent Overstreet } 409*cafe5635SKent Overstreet 410*cafe5635SKent Overstreet #endif 411*cafe5635SKent Overstreet 412*cafe5635SKent Overstreet #ifdef CONFIG_BCACHE_DEBUG 413*cafe5635SKent Overstreet static ssize_t btree_fuzz(struct kobject *k, struct kobj_attribute *a, 414*cafe5635SKent Overstreet const char *buffer, size_t size) 415*cafe5635SKent Overstreet { 416*cafe5635SKent Overstreet void dump(struct btree *b) 417*cafe5635SKent Overstreet { 418*cafe5635SKent Overstreet struct bset *i; 419*cafe5635SKent Overstreet 420*cafe5635SKent Overstreet for (i = b->sets[0].data; 421*cafe5635SKent Overstreet index(i, b) < btree_blocks(b) && 422*cafe5635SKent Overstreet i->seq == b->sets[0].data->seq; 423*cafe5635SKent Overstreet i = ((void *) i) + set_blocks(i, b->c) * block_bytes(b->c)) 424*cafe5635SKent Overstreet dump_bset(b, i); 425*cafe5635SKent Overstreet } 426*cafe5635SKent Overstreet 427*cafe5635SKent Overstreet struct cache_sb *sb; 428*cafe5635SKent Overstreet struct cache_set *c; 429*cafe5635SKent Overstreet struct btree *all[3], *b, *fill, *orig; 430*cafe5635SKent Overstreet int j; 431*cafe5635SKent Overstreet 432*cafe5635SKent Overstreet struct btree_op op; 433*cafe5635SKent Overstreet bch_btree_op_init_stack(&op); 434*cafe5635SKent Overstreet 435*cafe5635SKent Overstreet sb = kzalloc(sizeof(struct cache_sb), GFP_KERNEL); 436*cafe5635SKent Overstreet if (!sb) 437*cafe5635SKent Overstreet return -ENOMEM; 438*cafe5635SKent Overstreet 439*cafe5635SKent Overstreet sb->bucket_size = 128; 440*cafe5635SKent Overstreet sb->block_size = 4; 441*cafe5635SKent Overstreet 442*cafe5635SKent Overstreet c = bch_cache_set_alloc(sb); 443*cafe5635SKent Overstreet if (!c) 444*cafe5635SKent Overstreet return -ENOMEM; 445*cafe5635SKent Overstreet 446*cafe5635SKent Overstreet for (j = 0; j < 3; j++) { 447*cafe5635SKent Overstreet BUG_ON(list_empty(&c->btree_cache)); 448*cafe5635SKent Overstreet all[j] = list_first_entry(&c->btree_cache, struct btree, list); 449*cafe5635SKent Overstreet list_del_init(&all[j]->list); 450*cafe5635SKent Overstreet 451*cafe5635SKent Overstreet all[j]->key = KEY(0, 0, c->sb.bucket_size); 452*cafe5635SKent Overstreet bkey_copy_key(&all[j]->key, &MAX_KEY); 453*cafe5635SKent Overstreet } 454*cafe5635SKent Overstreet 455*cafe5635SKent Overstreet b = all[0]; 456*cafe5635SKent Overstreet fill = all[1]; 457*cafe5635SKent Overstreet orig = all[2]; 458*cafe5635SKent Overstreet 459*cafe5635SKent Overstreet while (1) { 460*cafe5635SKent Overstreet for (j = 0; j < 3; j++) 461*cafe5635SKent Overstreet all[j]->written = all[j]->nsets = 0; 462*cafe5635SKent Overstreet 463*cafe5635SKent Overstreet bch_bset_init_next(b); 464*cafe5635SKent Overstreet 465*cafe5635SKent Overstreet while (1) { 466*cafe5635SKent Overstreet struct bset *i = write_block(b); 467*cafe5635SKent Overstreet struct bkey *k = op.keys.top; 468*cafe5635SKent Overstreet unsigned rand; 469*cafe5635SKent Overstreet 470*cafe5635SKent Overstreet bkey_init(k); 471*cafe5635SKent Overstreet rand = get_random_int(); 472*cafe5635SKent Overstreet 473*cafe5635SKent Overstreet op.type = rand & 1 474*cafe5635SKent Overstreet ? BTREE_INSERT 475*cafe5635SKent Overstreet : BTREE_REPLACE; 476*cafe5635SKent Overstreet rand >>= 1; 477*cafe5635SKent Overstreet 478*cafe5635SKent Overstreet SET_KEY_SIZE(k, bucket_remainder(c, rand)); 479*cafe5635SKent Overstreet rand >>= c->bucket_bits; 480*cafe5635SKent Overstreet rand &= 1024 * 512 - 1; 481*cafe5635SKent Overstreet rand += c->sb.bucket_size; 482*cafe5635SKent Overstreet SET_KEY_OFFSET(k, rand); 483*cafe5635SKent Overstreet #if 0 484*cafe5635SKent Overstreet SET_KEY_PTRS(k, 1); 485*cafe5635SKent Overstreet #endif 486*cafe5635SKent Overstreet bch_keylist_push(&op.keys); 487*cafe5635SKent Overstreet bch_btree_insert_keys(b, &op); 488*cafe5635SKent Overstreet 489*cafe5635SKent Overstreet if (should_split(b) || 490*cafe5635SKent Overstreet set_blocks(i, b->c) != 491*cafe5635SKent Overstreet __set_blocks(i, i->keys + 15, b->c)) { 492*cafe5635SKent Overstreet i->csum = csum_set(i); 493*cafe5635SKent Overstreet 494*cafe5635SKent Overstreet memcpy(write_block(fill), 495*cafe5635SKent Overstreet i, set_bytes(i)); 496*cafe5635SKent Overstreet 497*cafe5635SKent Overstreet b->written += set_blocks(i, b->c); 498*cafe5635SKent Overstreet fill->written = b->written; 499*cafe5635SKent Overstreet if (b->written == btree_blocks(b)) 500*cafe5635SKent Overstreet break; 501*cafe5635SKent Overstreet 502*cafe5635SKent Overstreet bch_btree_sort_lazy(b); 503*cafe5635SKent Overstreet bch_bset_init_next(b); 504*cafe5635SKent Overstreet } 505*cafe5635SKent Overstreet } 506*cafe5635SKent Overstreet 507*cafe5635SKent Overstreet memcpy(orig->sets[0].data, 508*cafe5635SKent Overstreet fill->sets[0].data, 509*cafe5635SKent Overstreet btree_bytes(c)); 510*cafe5635SKent Overstreet 511*cafe5635SKent Overstreet bch_btree_sort(b); 512*cafe5635SKent Overstreet fill->written = 0; 513*cafe5635SKent Overstreet bch_btree_read_done(&fill->io.cl); 514*cafe5635SKent Overstreet 515*cafe5635SKent Overstreet if (b->sets[0].data->keys != fill->sets[0].data->keys || 516*cafe5635SKent Overstreet memcmp(b->sets[0].data->start, 517*cafe5635SKent Overstreet fill->sets[0].data->start, 518*cafe5635SKent Overstreet b->sets[0].data->keys * sizeof(uint64_t))) { 519*cafe5635SKent Overstreet struct bset *i = b->sets[0].data; 520*cafe5635SKent Overstreet struct bkey *k, *l; 521*cafe5635SKent Overstreet 522*cafe5635SKent Overstreet for (k = i->start, 523*cafe5635SKent Overstreet l = fill->sets[0].data->start; 524*cafe5635SKent Overstreet k < end(i); 525*cafe5635SKent Overstreet k = bkey_next(k), l = bkey_next(l)) 526*cafe5635SKent Overstreet if (bkey_cmp(k, l) || 527*cafe5635SKent Overstreet KEY_SIZE(k) != KEY_SIZE(l)) 528*cafe5635SKent Overstreet pr_err("key %zi differs: %s " 529*cafe5635SKent Overstreet "!= %s", (uint64_t *) k - i->d, 530*cafe5635SKent Overstreet pkey(k), pkey(l)); 531*cafe5635SKent Overstreet 532*cafe5635SKent Overstreet for (j = 0; j < 3; j++) { 533*cafe5635SKent Overstreet pr_err("**** Set %i ****", j); 534*cafe5635SKent Overstreet dump(all[j]); 535*cafe5635SKent Overstreet } 536*cafe5635SKent Overstreet panic("\n"); 537*cafe5635SKent Overstreet } 538*cafe5635SKent Overstreet 539*cafe5635SKent Overstreet pr_info("fuzz complete: %i keys", b->sets[0].data->keys); 540*cafe5635SKent Overstreet } 541*cafe5635SKent Overstreet } 542*cafe5635SKent Overstreet 543*cafe5635SKent Overstreet kobj_attribute_write(fuzz, btree_fuzz); 544*cafe5635SKent Overstreet #endif 545*cafe5635SKent Overstreet 546*cafe5635SKent Overstreet void bch_debug_exit(void) 547*cafe5635SKent Overstreet { 548*cafe5635SKent Overstreet if (!IS_ERR_OR_NULL(debug)) 549*cafe5635SKent Overstreet debugfs_remove_recursive(debug); 550*cafe5635SKent Overstreet } 551*cafe5635SKent Overstreet 552*cafe5635SKent Overstreet int __init bch_debug_init(struct kobject *kobj) 553*cafe5635SKent Overstreet { 554*cafe5635SKent Overstreet int ret = 0; 555*cafe5635SKent Overstreet #ifdef CONFIG_BCACHE_DEBUG 556*cafe5635SKent Overstreet ret = sysfs_create_file(kobj, &ksysfs_fuzz.attr); 557*cafe5635SKent Overstreet if (ret) 558*cafe5635SKent Overstreet return ret; 559*cafe5635SKent Overstreet #endif 560*cafe5635SKent Overstreet 561*cafe5635SKent Overstreet debug = debugfs_create_dir("bcache", NULL); 562*cafe5635SKent Overstreet return ret; 563*cafe5635SKent Overstreet } 564