1 /* 2 * zcore module to export memory content and register sets for creating system 3 * dumps on SCSI disks (zfcpdump). The "zcore/mem" debugfs file shows the same 4 * dump format as s390 standalone dumps. 5 * 6 * For more information please refer to Documentation/s390/zfcpdump.txt 7 * 8 * Copyright IBM Corp. 2003,2007 9 * Author(s): Michael Holzheu 10 */ 11 12 #define KMSG_COMPONENT "zdump" 13 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 14 15 #include <linux/init.h> 16 #include <linux/miscdevice.h> 17 #include <linux/utsname.h> 18 #include <linux/debugfs.h> 19 #include <asm/ipl.h> 20 #include <asm/sclp.h> 21 #include <asm/setup.h> 22 #include <asm/sigp.h> 23 #include <asm/uaccess.h> 24 #include <asm/debug.h> 25 #include <asm/processor.h> 26 #include <asm/irqflags.h> 27 #include "sclp.h" 28 29 #define TRACE(x...) debug_sprintf_event(zcore_dbf, 1, x) 30 31 #define TO_USER 0 32 #define TO_KERNEL 1 33 #define CHUNK_INFO_SIZE 34 /* 2 16-byte char, each followed by blank */ 34 35 enum arch_id { 36 ARCH_S390 = 0, 37 ARCH_S390X = 1, 38 }; 39 40 /* dump system info */ 41 42 struct sys_info { 43 enum arch_id arch; 44 unsigned long sa_base; 45 u32 sa_size; 46 int cpu_map[NR_CPUS]; 47 unsigned long mem_size; 48 union save_area lc_mask; 49 }; 50 51 static struct sys_info sys_info; 52 static struct debug_info *zcore_dbf; 53 static int hsa_available; 54 static struct dentry *zcore_dir; 55 static struct dentry *zcore_file; 56 static struct dentry *zcore_memmap_file; 57 58 /* 59 * Copy memory from HSA to kernel or user memory (not reentrant): 60 * 61 * @dest: Kernel or user buffer where memory should be copied to 62 * @src: Start address within HSA where data should be copied 63 * @count: Size of buffer, which should be copied 64 * @mode: Either TO_KERNEL or TO_USER 65 */ 66 static int memcpy_hsa(void *dest, unsigned long src, size_t count, int mode) 67 { 68 int offs, blk_num; 69 static char buf[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE))); 70 71 if (count == 0) 72 return 0; 73 74 /* copy first block */ 75 offs = 0; 76 if ((src % PAGE_SIZE) != 0) { 77 blk_num = src / PAGE_SIZE + 2; 78 if (sclp_sdias_copy(buf, blk_num, 1)) { 79 TRACE("sclp_sdias_copy() failed\n"); 80 return -EIO; 81 } 82 offs = min((PAGE_SIZE - (src % PAGE_SIZE)), count); 83 if (mode == TO_USER) { 84 if (copy_to_user((__force __user void*) dest, 85 buf + (src % PAGE_SIZE), offs)) 86 return -EFAULT; 87 } else 88 memcpy(dest, buf + (src % PAGE_SIZE), offs); 89 } 90 if (offs == count) 91 goto out; 92 93 /* copy middle */ 94 for (; (offs + PAGE_SIZE) <= count; offs += PAGE_SIZE) { 95 blk_num = (src + offs) / PAGE_SIZE + 2; 96 if (sclp_sdias_copy(buf, blk_num, 1)) { 97 TRACE("sclp_sdias_copy() failed\n"); 98 return -EIO; 99 } 100 if (mode == TO_USER) { 101 if (copy_to_user((__force __user void*) dest + offs, 102 buf, PAGE_SIZE)) 103 return -EFAULT; 104 } else 105 memcpy(dest + offs, buf, PAGE_SIZE); 106 } 107 if (offs == count) 108 goto out; 109 110 /* copy last block */ 111 blk_num = (src + offs) / PAGE_SIZE + 2; 112 if (sclp_sdias_copy(buf, blk_num, 1)) { 113 TRACE("sclp_sdias_copy() failed\n"); 114 return -EIO; 115 } 116 if (mode == TO_USER) { 117 if (copy_to_user((__force __user void*) dest + offs, buf, 118 PAGE_SIZE)) 119 return -EFAULT; 120 } else 121 memcpy(dest + offs, buf, count - offs); 122 out: 123 return 0; 124 } 125 126 static int memcpy_hsa_user(void __user *dest, unsigned long src, size_t count) 127 { 128 return memcpy_hsa((void __force *) dest, src, count, TO_USER); 129 } 130 131 static int memcpy_hsa_kernel(void *dest, unsigned long src, size_t count) 132 { 133 return memcpy_hsa(dest, src, count, TO_KERNEL); 134 } 135 136 static int memcpy_real(void *dest, unsigned long src, size_t count) 137 { 138 unsigned long flags; 139 int rc = -EFAULT; 140 register unsigned long _dest asm("2") = (unsigned long) dest; 141 register unsigned long _len1 asm("3") = (unsigned long) count; 142 register unsigned long _src asm("4") = src; 143 register unsigned long _len2 asm("5") = (unsigned long) count; 144 145 if (count == 0) 146 return 0; 147 flags = __raw_local_irq_stnsm(0xf8UL); /* switch to real mode */ 148 asm volatile ( 149 "0: mvcle %1,%2,0x0\n" 150 "1: jo 0b\n" 151 " lhi %0,0x0\n" 152 "2:\n" 153 EX_TABLE(1b,2b) 154 : "+d" (rc), "+d" (_dest), "+d" (_src), "+d" (_len1), 155 "+d" (_len2), "=m" (*((long*)dest)) 156 : "m" (*((long*)src)) 157 : "cc", "memory"); 158 __raw_local_irq_ssm(flags); 159 160 return rc; 161 } 162 163 static int memcpy_real_user(void __user *dest, unsigned long src, size_t count) 164 { 165 static char buf[4096]; 166 int offs = 0, size; 167 168 while (offs < count) { 169 size = min(sizeof(buf), count - offs); 170 if (memcpy_real(buf, src + offs, size)) 171 return -EFAULT; 172 if (copy_to_user(dest + offs, buf, size)) 173 return -EFAULT; 174 offs += size; 175 } 176 return 0; 177 } 178 179 #ifdef __s390x__ 180 /* 181 * Convert s390x (64 bit) cpu info to s390 (32 bit) cpu info 182 */ 183 static void __init s390x_to_s390_regs(union save_area *out, union save_area *in, 184 int cpu) 185 { 186 int i; 187 188 for (i = 0; i < 16; i++) { 189 out->s390.gp_regs[i] = in->s390x.gp_regs[i] & 0x00000000ffffffff; 190 out->s390.acc_regs[i] = in->s390x.acc_regs[i]; 191 out->s390.ctrl_regs[i] = 192 in->s390x.ctrl_regs[i] & 0x00000000ffffffff; 193 } 194 /* locore for 31 bit has only space for fpregs 0,2,4,6 */ 195 out->s390.fp_regs[0] = in->s390x.fp_regs[0]; 196 out->s390.fp_regs[1] = in->s390x.fp_regs[2]; 197 out->s390.fp_regs[2] = in->s390x.fp_regs[4]; 198 out->s390.fp_regs[3] = in->s390x.fp_regs[6]; 199 memcpy(&(out->s390.psw[0]), &(in->s390x.psw[0]), 4); 200 out->s390.psw[1] |= 0x8; /* set bit 12 */ 201 memcpy(&(out->s390.psw[4]),&(in->s390x.psw[12]), 4); 202 out->s390.psw[4] |= 0x80; /* set (31bit) addressing bit */ 203 out->s390.pref_reg = in->s390x.pref_reg; 204 out->s390.timer = in->s390x.timer; 205 out->s390.clk_cmp = in->s390x.clk_cmp; 206 } 207 208 static void __init s390x_to_s390_save_areas(void) 209 { 210 int i = 1; 211 static union save_area tmp; 212 213 while (zfcpdump_save_areas[i]) { 214 s390x_to_s390_regs(&tmp, zfcpdump_save_areas[i], i); 215 memcpy(zfcpdump_save_areas[i], &tmp, sizeof(tmp)); 216 i++; 217 } 218 } 219 220 #endif /* __s390x__ */ 221 222 static int __init init_cpu_info(enum arch_id arch) 223 { 224 union save_area *sa; 225 226 /* get info for boot cpu from lowcore, stored in the HSA */ 227 228 sa = kmalloc(sizeof(*sa), GFP_KERNEL); 229 if (!sa) 230 return -ENOMEM; 231 if (memcpy_hsa_kernel(sa, sys_info.sa_base, sys_info.sa_size) < 0) { 232 TRACE("could not copy from HSA\n"); 233 kfree(sa); 234 return -EIO; 235 } 236 zfcpdump_save_areas[0] = sa; 237 238 #ifdef __s390x__ 239 /* convert s390x regs to s390, if we are dumping an s390 Linux */ 240 241 if (arch == ARCH_S390) 242 s390x_to_s390_save_areas(); 243 #endif 244 245 return 0; 246 } 247 248 static DEFINE_MUTEX(zcore_mutex); 249 250 #define DUMP_VERSION 0x3 251 #define DUMP_MAGIC 0xa8190173618f23fdULL 252 #define DUMP_ARCH_S390X 2 253 #define DUMP_ARCH_S390 1 254 #define HEADER_SIZE 4096 255 256 /* dump header dumped according to s390 crash dump format */ 257 258 struct zcore_header { 259 u64 magic; 260 u32 version; 261 u32 header_size; 262 u32 dump_level; 263 u32 page_size; 264 u64 mem_size; 265 u64 mem_start; 266 u64 mem_end; 267 u32 num_pages; 268 u32 pad1; 269 u64 tod; 270 cpuid_t cpu_id; 271 u32 arch_id; 272 u32 volnr; 273 u32 build_arch; 274 u64 rmem_size; 275 char pad2[4016]; 276 } __attribute__((packed,__aligned__(16))); 277 278 static struct zcore_header zcore_header = { 279 .magic = DUMP_MAGIC, 280 .version = DUMP_VERSION, 281 .header_size = 4096, 282 .dump_level = 0, 283 .page_size = PAGE_SIZE, 284 .mem_start = 0, 285 #ifdef __s390x__ 286 .build_arch = DUMP_ARCH_S390X, 287 #else 288 .build_arch = DUMP_ARCH_S390, 289 #endif 290 }; 291 292 /* 293 * Copy lowcore info to buffer. Use map in order to copy only register parts. 294 * 295 * @buf: User buffer 296 * @sa: Pointer to save area 297 * @sa_off: Offset in save area to copy 298 * @len: Number of bytes to copy 299 */ 300 static int copy_lc(void __user *buf, void *sa, int sa_off, int len) 301 { 302 int i; 303 char *lc_mask = (char*)&sys_info.lc_mask; 304 305 for (i = 0; i < len; i++) { 306 if (!lc_mask[i + sa_off]) 307 continue; 308 if (copy_to_user(buf + i, sa + sa_off + i, 1)) 309 return -EFAULT; 310 } 311 return 0; 312 } 313 314 /* 315 * Copy lowcores info to memory, if necessary 316 * 317 * @buf: User buffer 318 * @addr: Start address of buffer in dump memory 319 * @count: Size of buffer 320 */ 321 static int zcore_add_lc(char __user *buf, unsigned long start, size_t count) 322 { 323 unsigned long end; 324 int i = 0; 325 326 if (count == 0) 327 return 0; 328 329 end = start + count; 330 while (zfcpdump_save_areas[i]) { 331 unsigned long cp_start, cp_end; /* copy range */ 332 unsigned long sa_start, sa_end; /* save area range */ 333 unsigned long prefix; 334 unsigned long sa_off, len, buf_off; 335 336 if (sys_info.arch == ARCH_S390) 337 prefix = zfcpdump_save_areas[i]->s390.pref_reg; 338 else 339 prefix = zfcpdump_save_areas[i]->s390x.pref_reg; 340 341 sa_start = prefix + sys_info.sa_base; 342 sa_end = prefix + sys_info.sa_base + sys_info.sa_size; 343 344 if ((end < sa_start) || (start > sa_end)) 345 goto next; 346 cp_start = max(start, sa_start); 347 cp_end = min(end, sa_end); 348 349 buf_off = cp_start - start; 350 sa_off = cp_start - sa_start; 351 len = cp_end - cp_start; 352 353 TRACE("copy_lc for: %lx\n", start); 354 if (copy_lc(buf + buf_off, zfcpdump_save_areas[i], sa_off, len)) 355 return -EFAULT; 356 next: 357 i++; 358 } 359 return 0; 360 } 361 362 /* 363 * Read routine for zcore character device 364 * First 4K are dump header 365 * Next 32MB are HSA Memory 366 * Rest is read from absolute Memory 367 */ 368 static ssize_t zcore_read(struct file *file, char __user *buf, size_t count, 369 loff_t *ppos) 370 { 371 unsigned long mem_start; /* Start address in memory */ 372 size_t mem_offs; /* Offset in dump memory */ 373 size_t hdr_count; /* Size of header part of output buffer */ 374 size_t size; 375 int rc; 376 377 mutex_lock(&zcore_mutex); 378 379 if (*ppos > (sys_info.mem_size + HEADER_SIZE)) { 380 rc = -EINVAL; 381 goto fail; 382 } 383 384 count = min(count, (size_t) (sys_info.mem_size + HEADER_SIZE - *ppos)); 385 386 /* Copy dump header */ 387 if (*ppos < HEADER_SIZE) { 388 size = min(count, (size_t) (HEADER_SIZE - *ppos)); 389 if (copy_to_user(buf, &zcore_header + *ppos, size)) { 390 rc = -EFAULT; 391 goto fail; 392 } 393 hdr_count = size; 394 mem_start = 0; 395 } else { 396 hdr_count = 0; 397 mem_start = *ppos - HEADER_SIZE; 398 } 399 400 mem_offs = 0; 401 402 /* Copy from HSA data */ 403 if (*ppos < (ZFCPDUMP_HSA_SIZE + HEADER_SIZE)) { 404 size = min((count - hdr_count), (size_t) (ZFCPDUMP_HSA_SIZE 405 - mem_start)); 406 rc = memcpy_hsa_user(buf + hdr_count, mem_start, size); 407 if (rc) 408 goto fail; 409 410 mem_offs += size; 411 } 412 413 /* Copy from real mem */ 414 size = count - mem_offs - hdr_count; 415 rc = memcpy_real_user(buf + hdr_count + mem_offs, mem_start + mem_offs, 416 size); 417 if (rc) 418 goto fail; 419 420 /* 421 * Since s390 dump analysis tools like lcrash or crash 422 * expect register sets in the prefix pages of the cpus, 423 * we copy them into the read buffer, if necessary. 424 * buf + hdr_count: Start of memory part of output buffer 425 * mem_start: Start memory address to copy from 426 * count - hdr_count: Size of memory area to copy 427 */ 428 if (zcore_add_lc(buf + hdr_count, mem_start, count - hdr_count)) { 429 rc = -EFAULT; 430 goto fail; 431 } 432 *ppos += count; 433 fail: 434 mutex_unlock(&zcore_mutex); 435 return (rc < 0) ? rc : count; 436 } 437 438 static int zcore_open(struct inode *inode, struct file *filp) 439 { 440 if (!hsa_available) 441 return -ENODATA; 442 else 443 return capable(CAP_SYS_RAWIO) ? 0 : -EPERM; 444 } 445 446 static int zcore_release(struct inode *inode, struct file *filep) 447 { 448 diag308(DIAG308_REL_HSA, NULL); 449 hsa_available = 0; 450 return 0; 451 } 452 453 static loff_t zcore_lseek(struct file *file, loff_t offset, int orig) 454 { 455 loff_t rc; 456 457 mutex_lock(&zcore_mutex); 458 switch (orig) { 459 case 0: 460 file->f_pos = offset; 461 rc = file->f_pos; 462 break; 463 case 1: 464 file->f_pos += offset; 465 rc = file->f_pos; 466 break; 467 default: 468 rc = -EINVAL; 469 } 470 mutex_unlock(&zcore_mutex); 471 return rc; 472 } 473 474 static const struct file_operations zcore_fops = { 475 .owner = THIS_MODULE, 476 .llseek = zcore_lseek, 477 .read = zcore_read, 478 .open = zcore_open, 479 .release = zcore_release, 480 }; 481 482 static ssize_t zcore_memmap_read(struct file *filp, char __user *buf, 483 size_t count, loff_t *ppos) 484 { 485 return simple_read_from_buffer(buf, count, ppos, filp->private_data, 486 MEMORY_CHUNKS * CHUNK_INFO_SIZE); 487 } 488 489 static int zcore_memmap_open(struct inode *inode, struct file *filp) 490 { 491 int i; 492 char *buf; 493 struct mem_chunk *chunk_array; 494 495 chunk_array = kzalloc(MEMORY_CHUNKS * sizeof(struct mem_chunk), 496 GFP_KERNEL); 497 if (!chunk_array) 498 return -ENOMEM; 499 detect_memory_layout(chunk_array); 500 buf = kzalloc(MEMORY_CHUNKS * CHUNK_INFO_SIZE, GFP_KERNEL); 501 if (!buf) { 502 kfree(chunk_array); 503 return -ENOMEM; 504 } 505 for (i = 0; i < MEMORY_CHUNKS; i++) { 506 sprintf(buf + (i * CHUNK_INFO_SIZE), "%016llx %016llx ", 507 (unsigned long long) chunk_array[i].addr, 508 (unsigned long long) chunk_array[i].size); 509 if (chunk_array[i].size == 0) 510 break; 511 } 512 kfree(chunk_array); 513 filp->private_data = buf; 514 return 0; 515 } 516 517 static int zcore_memmap_release(struct inode *inode, struct file *filp) 518 { 519 kfree(filp->private_data); 520 return 0; 521 } 522 523 static const struct file_operations zcore_memmap_fops = { 524 .owner = THIS_MODULE, 525 .read = zcore_memmap_read, 526 .open = zcore_memmap_open, 527 .release = zcore_memmap_release, 528 }; 529 530 531 static void __init set_s390_lc_mask(union save_area *map) 532 { 533 memset(&map->s390.ext_save, 0xff, sizeof(map->s390.ext_save)); 534 memset(&map->s390.timer, 0xff, sizeof(map->s390.timer)); 535 memset(&map->s390.clk_cmp, 0xff, sizeof(map->s390.clk_cmp)); 536 memset(&map->s390.psw, 0xff, sizeof(map->s390.psw)); 537 memset(&map->s390.pref_reg, 0xff, sizeof(map->s390.pref_reg)); 538 memset(&map->s390.acc_regs, 0xff, sizeof(map->s390.acc_regs)); 539 memset(&map->s390.fp_regs, 0xff, sizeof(map->s390.fp_regs)); 540 memset(&map->s390.gp_regs, 0xff, sizeof(map->s390.gp_regs)); 541 memset(&map->s390.ctrl_regs, 0xff, sizeof(map->s390.ctrl_regs)); 542 } 543 544 static void __init set_s390x_lc_mask(union save_area *map) 545 { 546 memset(&map->s390x.fp_regs, 0xff, sizeof(map->s390x.fp_regs)); 547 memset(&map->s390x.gp_regs, 0xff, sizeof(map->s390x.gp_regs)); 548 memset(&map->s390x.psw, 0xff, sizeof(map->s390x.psw)); 549 memset(&map->s390x.pref_reg, 0xff, sizeof(map->s390x.pref_reg)); 550 memset(&map->s390x.fp_ctrl_reg, 0xff, sizeof(map->s390x.fp_ctrl_reg)); 551 memset(&map->s390x.tod_reg, 0xff, sizeof(map->s390x.tod_reg)); 552 memset(&map->s390x.timer, 0xff, sizeof(map->s390x.timer)); 553 memset(&map->s390x.clk_cmp, 0xff, sizeof(map->s390x.clk_cmp)); 554 memset(&map->s390x.acc_regs, 0xff, sizeof(map->s390x.acc_regs)); 555 memset(&map->s390x.ctrl_regs, 0xff, sizeof(map->s390x.ctrl_regs)); 556 } 557 558 /* 559 * Initialize dump globals for a given architecture 560 */ 561 static int __init sys_info_init(enum arch_id arch) 562 { 563 int rc; 564 565 switch (arch) { 566 case ARCH_S390X: 567 pr_alert("DETECTED 'S390X (64 bit) OS'\n"); 568 sys_info.sa_base = SAVE_AREA_BASE_S390X; 569 sys_info.sa_size = sizeof(struct save_area_s390x); 570 set_s390x_lc_mask(&sys_info.lc_mask); 571 break; 572 case ARCH_S390: 573 pr_alert("DETECTED 'S390 (32 bit) OS'\n"); 574 sys_info.sa_base = SAVE_AREA_BASE_S390; 575 sys_info.sa_size = sizeof(struct save_area_s390); 576 set_s390_lc_mask(&sys_info.lc_mask); 577 break; 578 default: 579 pr_alert("0x%x is an unknown architecture.\n",arch); 580 return -EINVAL; 581 } 582 sys_info.arch = arch; 583 rc = init_cpu_info(arch); 584 if (rc) 585 return rc; 586 sys_info.mem_size = real_memory_size; 587 588 return 0; 589 } 590 591 static int __init check_sdias(void) 592 { 593 int rc, act_hsa_size; 594 595 rc = sclp_sdias_blk_count(); 596 if (rc < 0) { 597 TRACE("Could not determine HSA size\n"); 598 return rc; 599 } 600 act_hsa_size = (rc - 1) * PAGE_SIZE; 601 if (act_hsa_size < ZFCPDUMP_HSA_SIZE) { 602 TRACE("HSA size too small: %i\n", act_hsa_size); 603 return -EINVAL; 604 } 605 return 0; 606 } 607 608 static int __init get_mem_size(unsigned long *mem) 609 { 610 int i; 611 struct mem_chunk *chunk_array; 612 613 chunk_array = kzalloc(MEMORY_CHUNKS * sizeof(struct mem_chunk), 614 GFP_KERNEL); 615 if (!chunk_array) 616 return -ENOMEM; 617 detect_memory_layout(chunk_array); 618 for (i = 0; i < MEMORY_CHUNKS; i++) { 619 if (chunk_array[i].size == 0) 620 break; 621 *mem += chunk_array[i].size; 622 } 623 kfree(chunk_array); 624 return 0; 625 } 626 627 static int __init zcore_header_init(int arch, struct zcore_header *hdr) 628 { 629 int rc; 630 unsigned long memory = 0; 631 632 if (arch == ARCH_S390X) 633 hdr->arch_id = DUMP_ARCH_S390X; 634 else 635 hdr->arch_id = DUMP_ARCH_S390; 636 rc = get_mem_size(&memory); 637 if (rc) 638 return rc; 639 hdr->mem_size = memory; 640 hdr->rmem_size = memory; 641 hdr->mem_end = sys_info.mem_size; 642 hdr->num_pages = memory / PAGE_SIZE; 643 hdr->tod = get_clock(); 644 get_cpu_id(&hdr->cpu_id); 645 return 0; 646 } 647 648 static int __init zcore_init(void) 649 { 650 unsigned char arch; 651 int rc; 652 653 if (ipl_info.type != IPL_TYPE_FCP_DUMP) 654 return -ENODATA; 655 656 zcore_dbf = debug_register("zcore", 4, 1, 4 * sizeof(long)); 657 debug_register_view(zcore_dbf, &debug_sprintf_view); 658 debug_set_level(zcore_dbf, 6); 659 660 TRACE("devno: %x\n", ipl_info.data.fcp.dev_id.devno); 661 TRACE("wwpn: %llx\n", (unsigned long long) ipl_info.data.fcp.wwpn); 662 TRACE("lun: %llx\n", (unsigned long long) ipl_info.data.fcp.lun); 663 664 rc = sclp_sdias_init(); 665 if (rc) 666 goto fail; 667 668 rc = check_sdias(); 669 if (rc) 670 goto fail; 671 672 rc = memcpy_hsa_kernel(&arch, __LC_AR_MODE_ID, 1); 673 if (rc) 674 goto fail; 675 676 #ifndef __s390x__ 677 if (arch == ARCH_S390X) { 678 pr_alert("The 32-bit dump tool cannot be used for a " 679 "64-bit system\n"); 680 rc = -EINVAL; 681 goto fail; 682 } 683 #endif 684 685 rc = sys_info_init(arch); 686 if (rc) 687 goto fail; 688 689 rc = zcore_header_init(arch, &zcore_header); 690 if (rc) 691 goto fail; 692 693 zcore_dir = debugfs_create_dir("zcore" , NULL); 694 if (!zcore_dir) { 695 rc = -ENOMEM; 696 goto fail; 697 } 698 zcore_file = debugfs_create_file("mem", S_IRUSR, zcore_dir, NULL, 699 &zcore_fops); 700 if (!zcore_file) { 701 rc = -ENOMEM; 702 goto fail_dir; 703 } 704 zcore_memmap_file = debugfs_create_file("memmap", S_IRUSR, zcore_dir, 705 NULL, &zcore_memmap_fops); 706 if (!zcore_memmap_file) { 707 rc = -ENOMEM; 708 goto fail_file; 709 } 710 hsa_available = 1; 711 return 0; 712 713 fail_file: 714 debugfs_remove(zcore_file); 715 fail_dir: 716 debugfs_remove(zcore_dir); 717 fail: 718 diag308(DIAG308_REL_HSA, NULL); 719 return rc; 720 } 721 722 static void __exit zcore_exit(void) 723 { 724 debug_unregister(zcore_dbf); 725 sclp_sdias_exit(); 726 diag308(DIAG308_REL_HSA, NULL); 727 } 728 729 MODULE_AUTHOR("Copyright IBM Corp. 2003,2007"); 730 MODULE_DESCRIPTION("zcore module for zfcpdump support"); 731 MODULE_LICENSE("GPL"); 732 733 subsys_initcall(zcore_init); 734 module_exit(zcore_exit); 735