Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * fs/partitions/check.c |
| 3 | * |
| 4 | * Code extracted from drivers/block/genhd.c |
| 5 | * Copyright (C) 1991-1998 Linus Torvalds |
| 6 | * Re-organised Feb 1998 Russell King |
| 7 | * |
| 8 | * We now have independent partition support from the |
| 9 | * block drivers, which allows all the partition code to |
| 10 | * be grouped in one location, and it to be mostly self |
| 11 | * contained. |
| 12 | * |
| 13 | * Added needed MAJORS for new pairs, {hdi,hdj}, {hdk,hdl} |
| 14 | */ |
| 15 | |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/fs.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 19 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <linux/kmod.h> |
| 21 | #include <linux/ctype.h> |
Jerome Marchand | 6f2576a | 2008-02-08 11:04:35 +0100 | [diff] [blame] | 22 | #include <linux/genhd.h> |
Arnaldo Carvalho de Melo | 157f9c0 | 2009-01-26 15:00:56 -0200 | [diff] [blame] | 23 | #include <linux/blktrace_api.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | |
| 25 | #include "check.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | |
| 27 | #include "acorn.h" |
| 28 | #include "amiga.h" |
| 29 | #include "atari.h" |
| 30 | #include "ldm.h" |
| 31 | #include "mac.h" |
| 32 | #include "msdos.h" |
| 33 | #include "osf.h" |
| 34 | #include "sgi.h" |
| 35 | #include "sun.h" |
| 36 | #include "ibm.h" |
| 37 | #include "ultrix.h" |
| 38 | #include "efi.h" |
Bob Copeland | 0e6e1db | 2006-01-16 22:14:20 -0800 | [diff] [blame] | 39 | #include "karma.h" |
Philippe De Muyter | 19d0e8c | 2007-05-08 00:29:15 -0700 | [diff] [blame] | 40 | #include "sysv68.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
| 42 | #ifdef CONFIG_BLK_DEV_MD |
| 43 | extern void md_autodetect_dev(dev_t dev); |
| 44 | #endif |
| 45 | |
| 46 | int warn_no_part = 1; /*This is ugly: should make genhd removable media aware*/ |
| 47 | |
Tejun Heo | 1493bf2 | 2010-05-15 20:09:30 +0200 | [diff] [blame] | 48 | static int (*check_part[])(struct parsed_partitions *) = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | /* |
| 50 | * Probe partition formats with tables at disk address 0 |
| 51 | * that also have an ADFS boot block at 0xdc0. |
| 52 | */ |
| 53 | #ifdef CONFIG_ACORN_PARTITION_ICS |
| 54 | adfspart_check_ICS, |
| 55 | #endif |
| 56 | #ifdef CONFIG_ACORN_PARTITION_POWERTEC |
| 57 | adfspart_check_POWERTEC, |
| 58 | #endif |
| 59 | #ifdef CONFIG_ACORN_PARTITION_EESOX |
| 60 | adfspart_check_EESOX, |
| 61 | #endif |
| 62 | |
| 63 | /* |
| 64 | * Now move on to formats that only have partition info at |
| 65 | * disk address 0xdc0. Since these may also have stale |
| 66 | * PC/BIOS partition tables, they need to come before |
| 67 | * the msdos entry. |
| 68 | */ |
| 69 | #ifdef CONFIG_ACORN_PARTITION_CUMANA |
| 70 | adfspart_check_CUMANA, |
| 71 | #endif |
| 72 | #ifdef CONFIG_ACORN_PARTITION_ADFS |
| 73 | adfspart_check_ADFS, |
| 74 | #endif |
| 75 | |
| 76 | #ifdef CONFIG_EFI_PARTITION |
| 77 | efi_partition, /* this must come before msdos */ |
| 78 | #endif |
| 79 | #ifdef CONFIG_SGI_PARTITION |
| 80 | sgi_partition, |
| 81 | #endif |
| 82 | #ifdef CONFIG_LDM_PARTITION |
| 83 | ldm_partition, /* this must come before msdos */ |
| 84 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | #ifdef CONFIG_MSDOS_PARTITION |
| 86 | msdos_partition, |
| 87 | #endif |
| 88 | #ifdef CONFIG_OSF_PARTITION |
| 89 | osf_partition, |
| 90 | #endif |
| 91 | #ifdef CONFIG_SUN_PARTITION |
| 92 | sun_partition, |
| 93 | #endif |
| 94 | #ifdef CONFIG_AMIGA_PARTITION |
| 95 | amiga_partition, |
| 96 | #endif |
| 97 | #ifdef CONFIG_ATARI_PARTITION |
| 98 | atari_partition, |
| 99 | #endif |
| 100 | #ifdef CONFIG_MAC_PARTITION |
| 101 | mac_partition, |
| 102 | #endif |
| 103 | #ifdef CONFIG_ULTRIX_PARTITION |
| 104 | ultrix_partition, |
| 105 | #endif |
| 106 | #ifdef CONFIG_IBM_PARTITION |
| 107 | ibm_partition, |
| 108 | #endif |
Bob Copeland | 0e6e1db | 2006-01-16 22:14:20 -0800 | [diff] [blame] | 109 | #ifdef CONFIG_KARMA_PARTITION |
| 110 | karma_partition, |
| 111 | #endif |
Philippe De Muyter | 19d0e8c | 2007-05-08 00:29:15 -0700 | [diff] [blame] | 112 | #ifdef CONFIG_SYSV68_PARTITION |
| 113 | sysv68_partition, |
| 114 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | NULL |
| 116 | }; |
| 117 | |
| 118 | /* |
| 119 | * disk_name() is used by partition check code and the genhd driver. |
| 120 | * It formats the devicename of the indicated disk into |
| 121 | * the supplied buffer (of size at least 32), and returns |
| 122 | * a pointer to that same buffer (for convenience). |
| 123 | */ |
| 124 | |
Tejun Heo | cf771cb | 2008-09-03 09:01:09 +0200 | [diff] [blame] | 125 | char *disk_name(struct gendisk *hd, int partno, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | { |
Tejun Heo | cf771cb | 2008-09-03 09:01:09 +0200 | [diff] [blame] | 127 | if (!partno) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | snprintf(buf, BDEVNAME_SIZE, "%s", hd->disk_name); |
| 129 | else if (isdigit(hd->disk_name[strlen(hd->disk_name)-1])) |
Tejun Heo | cf771cb | 2008-09-03 09:01:09 +0200 | [diff] [blame] | 130 | snprintf(buf, BDEVNAME_SIZE, "%sp%d", hd->disk_name, partno); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | else |
Tejun Heo | cf771cb | 2008-09-03 09:01:09 +0200 | [diff] [blame] | 132 | snprintf(buf, BDEVNAME_SIZE, "%s%d", hd->disk_name, partno); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | |
| 134 | return buf; |
| 135 | } |
| 136 | |
| 137 | const char *bdevname(struct block_device *bdev, char *buf) |
| 138 | { |
Tejun Heo | 0762b8b | 2008-08-25 19:56:12 +0900 | [diff] [blame] | 139 | return disk_name(bdev->bd_disk, bdev->bd_part->partno, buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | } |
| 141 | |
| 142 | EXPORT_SYMBOL(bdevname); |
| 143 | |
| 144 | /* |
| 145 | * There's very little reason to use this, you should really |
| 146 | * have a struct block_device just about everywhere and use |
| 147 | * bdevname() instead. |
| 148 | */ |
| 149 | const char *__bdevname(dev_t dev, char *buffer) |
| 150 | { |
| 151 | scnprintf(buffer, BDEVNAME_SIZE, "unknown-block(%u,%u)", |
| 152 | MAJOR(dev), MINOR(dev)); |
| 153 | return buffer; |
| 154 | } |
| 155 | |
| 156 | EXPORT_SYMBOL(__bdevname); |
| 157 | |
| 158 | static struct parsed_partitions * |
| 159 | check_partition(struct gendisk *hd, struct block_device *bdev) |
| 160 | { |
| 161 | struct parsed_partitions *state; |
Suzuki K P | 57881dd | 2006-12-06 20:35:16 -0800 | [diff] [blame] | 162 | int i, res, err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | |
Tejun Heo | b403a98 | 2010-05-15 20:09:31 +0200 | [diff] [blame] | 164 | state = kzalloc(sizeof(struct parsed_partitions), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | if (!state) |
| 166 | return NULL; |
Alexey Dobriyan | 9c867fb | 2010-08-10 18:03:14 -0700 | [diff] [blame] | 167 | state->pp_buf = (char *)__get_free_page(GFP_KERNEL); |
| 168 | if (!state->pp_buf) { |
| 169 | kfree(state); |
| 170 | return NULL; |
| 171 | } |
| 172 | state->pp_buf[0] = '\0'; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | |
Tejun Heo | 1493bf2 | 2010-05-15 20:09:30 +0200 | [diff] [blame] | 174 | state->bdev = bdev; |
Greg Kroah-Hartman | a296418 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 175 | disk_name(hd, 0, state->name); |
Alexey Dobriyan | 9c867fb | 2010-08-10 18:03:14 -0700 | [diff] [blame] | 176 | snprintf(state->pp_buf, PAGE_SIZE, " %s:", state->name); |
Greg Kroah-Hartman | a296418 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 177 | if (isdigit(state->name[strlen(state->name)-1])) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | sprintf(state->name, "p"); |
Greg Kroah-Hartman | a296418 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 179 | |
Tejun Heo | b5d0b9d | 2008-09-03 09:06:42 +0200 | [diff] [blame] | 180 | state->limit = disk_max_parts(hd); |
Suzuki K P | 57881dd | 2006-12-06 20:35:16 -0800 | [diff] [blame] | 181 | i = res = err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | while (!res && check_part[i]) { |
| 183 | memset(&state->parts, 0, sizeof(state->parts)); |
Tejun Heo | 1493bf2 | 2010-05-15 20:09:30 +0200 | [diff] [blame] | 184 | res = check_part[i++](state); |
Suzuki K P | 57881dd | 2006-12-06 20:35:16 -0800 | [diff] [blame] | 185 | if (res < 0) { |
| 186 | /* We have hit an I/O error which we don't report now. |
| 187 | * But record it, and let the others do their job. |
| 188 | */ |
| 189 | err = res; |
| 190 | res = 0; |
| 191 | } |
| 192 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | } |
Alexey Dobriyan | 9c867fb | 2010-08-10 18:03:14 -0700 | [diff] [blame] | 194 | if (res > 0) { |
| 195 | printk(KERN_INFO "%s", state->pp_buf); |
| 196 | |
| 197 | free_page((unsigned long)state->pp_buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | return state; |
Alexey Dobriyan | 9c867fb | 2010-08-10 18:03:14 -0700 | [diff] [blame] | 199 | } |
Tejun Heo | b403a98 | 2010-05-15 20:09:31 +0200 | [diff] [blame] | 200 | if (state->access_beyond_eod) |
| 201 | err = -ENOSPC; |
suzuki | 9bebff6 | 2007-03-07 20:41:24 -0800 | [diff] [blame] | 202 | if (err) |
Suzuki K P | 57881dd | 2006-12-06 20:35:16 -0800 | [diff] [blame] | 203 | /* The partition is unrecognized. So report I/O errors if there were any */ |
| 204 | res = err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | if (!res) |
Alexey Dobriyan | 9c867fb | 2010-08-10 18:03:14 -0700 | [diff] [blame] | 206 | strlcat(state->pp_buf, " unknown partition table\n", PAGE_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | else if (warn_no_part) |
Alexey Dobriyan | 9c867fb | 2010-08-10 18:03:14 -0700 | [diff] [blame] | 208 | strlcat(state->pp_buf, " unable to read partition table\n", PAGE_SIZE); |
| 209 | |
| 210 | printk(KERN_INFO "%s", state->pp_buf); |
| 211 | |
| 212 | free_page((unsigned long)state->pp_buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | kfree(state); |
Suzuki Kp | 5127d00 | 2006-12-06 20:35:14 -0800 | [diff] [blame] | 214 | return ERR_PTR(res); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | } |
| 216 | |
Tejun Heo | 0fc71e3 | 2008-10-13 13:27:59 +0200 | [diff] [blame] | 217 | static ssize_t part_partition_show(struct device *dev, |
| 218 | struct device_attribute *attr, char *buf) |
| 219 | { |
| 220 | struct hd_struct *p = dev_to_part(dev); |
| 221 | |
| 222 | return sprintf(buf, "%d\n", p->partno); |
| 223 | } |
| 224 | |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 225 | static ssize_t part_start_show(struct device *dev, |
| 226 | struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | { |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 228 | struct hd_struct *p = dev_to_part(dev); |
Kay Sievers | a7fd670 | 2005-10-01 14:49:43 +0200 | [diff] [blame] | 229 | |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 230 | return sprintf(buf, "%llu\n",(unsigned long long)p->start_sect); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | } |
| 232 | |
Tejun Heo | e561052 | 2008-08-25 19:56:09 +0900 | [diff] [blame] | 233 | ssize_t part_size_show(struct device *dev, |
| 234 | struct device_attribute *attr, char *buf) |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 235 | { |
| 236 | struct hd_struct *p = dev_to_part(dev); |
| 237 | return sprintf(buf, "%llu\n",(unsigned long long)p->nr_sects); |
| 238 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | |
Martin K. Petersen | c72758f | 2009-05-22 17:17:53 -0400 | [diff] [blame] | 240 | ssize_t part_alignment_offset_show(struct device *dev, |
| 241 | struct device_attribute *attr, char *buf) |
| 242 | { |
| 243 | struct hd_struct *p = dev_to_part(dev); |
| 244 | return sprintf(buf, "%llu\n", (unsigned long long)p->alignment_offset); |
| 245 | } |
| 246 | |
Martin K. Petersen | 86b3728 | 2009-11-10 11:50:21 +0100 | [diff] [blame] | 247 | ssize_t part_discard_alignment_show(struct device *dev, |
| 248 | struct device_attribute *attr, char *buf) |
| 249 | { |
| 250 | struct hd_struct *p = dev_to_part(dev); |
| 251 | return sprintf(buf, "%u\n", p->discard_alignment); |
| 252 | } |
| 253 | |
Tejun Heo | 074a7ac | 2008-08-25 19:56:14 +0900 | [diff] [blame] | 254 | ssize_t part_stat_show(struct device *dev, |
| 255 | struct device_attribute *attr, char *buf) |
Kay Sievers | a7fd670 | 2005-10-01 14:49:43 +0200 | [diff] [blame] | 256 | { |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 257 | struct hd_struct *p = dev_to_part(dev); |
Tejun Heo | c995905 | 2008-08-25 19:47:21 +0900 | [diff] [blame] | 258 | int cpu; |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 259 | |
Tejun Heo | 074a7ac | 2008-08-25 19:56:14 +0900 | [diff] [blame] | 260 | cpu = part_stat_lock(); |
Tejun Heo | c995905 | 2008-08-25 19:47:21 +0900 | [diff] [blame] | 261 | part_round_stats(cpu, p); |
Tejun Heo | 074a7ac | 2008-08-25 19:56:14 +0900 | [diff] [blame] | 262 | part_stat_unlock(); |
Jerome Marchand | 34e8bea | 2008-02-08 11:04:55 +0100 | [diff] [blame] | 263 | return sprintf(buf, |
| 264 | "%8lu %8lu %8llu %8u " |
| 265 | "%8lu %8lu %8llu %8u " |
| 266 | "%8u %8u %8u" |
| 267 | "\n", |
| 268 | part_stat_read(p, ios[READ]), |
| 269 | part_stat_read(p, merges[READ]), |
| 270 | (unsigned long long)part_stat_read(p, sectors[READ]), |
| 271 | jiffies_to_msecs(part_stat_read(p, ticks[READ])), |
| 272 | part_stat_read(p, ios[WRITE]), |
| 273 | part_stat_read(p, merges[WRITE]), |
| 274 | (unsigned long long)part_stat_read(p, sectors[WRITE]), |
| 275 | jiffies_to_msecs(part_stat_read(p, ticks[WRITE])), |
Nikanth Karthikesan | 316d315 | 2009-10-06 20:16:55 +0200 | [diff] [blame] | 276 | part_in_flight(p), |
Jerome Marchand | 34e8bea | 2008-02-08 11:04:55 +0100 | [diff] [blame] | 277 | jiffies_to_msecs(part_stat_read(p, io_ticks)), |
| 278 | jiffies_to_msecs(part_stat_read(p, time_in_queue))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | |
Nikanth Karthikesan | 316d315 | 2009-10-06 20:16:55 +0200 | [diff] [blame] | 281 | ssize_t part_inflight_show(struct device *dev, |
| 282 | struct device_attribute *attr, char *buf) |
| 283 | { |
| 284 | struct hd_struct *p = dev_to_part(dev); |
| 285 | |
| 286 | return sprintf(buf, "%8u %8u\n", p->in_flight[0], p->in_flight[1]); |
| 287 | } |
| 288 | |
Akinobu Mita | c17bb49 | 2006-12-08 02:39:46 -0800 | [diff] [blame] | 289 | #ifdef CONFIG_FAIL_MAKE_REQUEST |
Tejun Heo | eddb2e2 | 2008-08-25 19:56:13 +0900 | [diff] [blame] | 290 | ssize_t part_fail_show(struct device *dev, |
| 291 | struct device_attribute *attr, char *buf) |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 292 | { |
| 293 | struct hd_struct *p = dev_to_part(dev); |
Akinobu Mita | c17bb49 | 2006-12-08 02:39:46 -0800 | [diff] [blame] | 294 | |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 295 | return sprintf(buf, "%d\n", p->make_it_fail); |
| 296 | } |
| 297 | |
Tejun Heo | eddb2e2 | 2008-08-25 19:56:13 +0900 | [diff] [blame] | 298 | ssize_t part_fail_store(struct device *dev, |
| 299 | struct device_attribute *attr, |
| 300 | const char *buf, size_t count) |
Akinobu Mita | c17bb49 | 2006-12-08 02:39:46 -0800 | [diff] [blame] | 301 | { |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 302 | struct hd_struct *p = dev_to_part(dev); |
Akinobu Mita | c17bb49 | 2006-12-08 02:39:46 -0800 | [diff] [blame] | 303 | int i; |
| 304 | |
| 305 | if (count > 0 && sscanf(buf, "%d", &i) > 0) |
| 306 | p->make_it_fail = (i == 0) ? 0 : 1; |
| 307 | |
| 308 | return count; |
| 309 | } |
Akinobu Mita | c17bb49 | 2006-12-08 02:39:46 -0800 | [diff] [blame] | 310 | #endif |
| 311 | |
Tejun Heo | 0fc71e3 | 2008-10-13 13:27:59 +0200 | [diff] [blame] | 312 | static DEVICE_ATTR(partition, S_IRUGO, part_partition_show, NULL); |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 313 | static DEVICE_ATTR(start, S_IRUGO, part_start_show, NULL); |
| 314 | static DEVICE_ATTR(size, S_IRUGO, part_size_show, NULL); |
Martin K. Petersen | c72758f | 2009-05-22 17:17:53 -0400 | [diff] [blame] | 315 | static DEVICE_ATTR(alignment_offset, S_IRUGO, part_alignment_offset_show, NULL); |
Martin K. Petersen | 86b3728 | 2009-11-10 11:50:21 +0100 | [diff] [blame] | 316 | static DEVICE_ATTR(discard_alignment, S_IRUGO, part_discard_alignment_show, |
| 317 | NULL); |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 318 | static DEVICE_ATTR(stat, S_IRUGO, part_stat_show, NULL); |
Nikanth Karthikesan | 316d315 | 2009-10-06 20:16:55 +0200 | [diff] [blame] | 319 | static DEVICE_ATTR(inflight, S_IRUGO, part_inflight_show, NULL); |
Akinobu Mita | c17bb49 | 2006-12-08 02:39:46 -0800 | [diff] [blame] | 320 | #ifdef CONFIG_FAIL_MAKE_REQUEST |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 321 | static struct device_attribute dev_attr_fail = |
| 322 | __ATTR(make-it-fail, S_IRUGO|S_IWUSR, part_fail_show, part_fail_store); |
Akinobu Mita | c17bb49 | 2006-12-08 02:39:46 -0800 | [diff] [blame] | 323 | #endif |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 324 | |
| 325 | static struct attribute *part_attrs[] = { |
Tejun Heo | 0fc71e3 | 2008-10-13 13:27:59 +0200 | [diff] [blame] | 326 | &dev_attr_partition.attr, |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 327 | &dev_attr_start.attr, |
| 328 | &dev_attr_size.attr, |
Martin K. Petersen | c72758f | 2009-05-22 17:17:53 -0400 | [diff] [blame] | 329 | &dev_attr_alignment_offset.attr, |
Martin K. Petersen | 86b3728 | 2009-11-10 11:50:21 +0100 | [diff] [blame] | 330 | &dev_attr_discard_alignment.attr, |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 331 | &dev_attr_stat.attr, |
Nikanth Karthikesan | 316d315 | 2009-10-06 20:16:55 +0200 | [diff] [blame] | 332 | &dev_attr_inflight.attr, |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 333 | #ifdef CONFIG_FAIL_MAKE_REQUEST |
| 334 | &dev_attr_fail.attr, |
| 335 | #endif |
| 336 | NULL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | }; |
| 338 | |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 339 | static struct attribute_group part_attr_group = { |
| 340 | .attrs = part_attrs, |
| 341 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | |
David Brownell | a4dbd67 | 2009-06-24 10:06:31 -0700 | [diff] [blame] | 343 | static const struct attribute_group *part_attr_groups[] = { |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 344 | &part_attr_group, |
Arnaldo Carvalho de Melo | c71a896 | 2009-01-23 12:06:27 -0200 | [diff] [blame] | 345 | #ifdef CONFIG_BLK_DEV_IO_TRACE |
| 346 | &blk_trace_attr_group, |
| 347 | #endif |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 348 | NULL |
| 349 | }; |
| 350 | |
| 351 | static void part_release(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | { |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 353 | struct hd_struct *p = dev_to_part(dev); |
Jerome Marchand | 6f2576a | 2008-02-08 11:04:35 +0100 | [diff] [blame] | 354 | free_part_stats(p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | kfree(p); |
| 356 | } |
| 357 | |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 358 | struct device_type part_type = { |
| 359 | .name = "partition", |
| 360 | .groups = part_attr_groups, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | .release = part_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | }; |
| 363 | |
Tejun Heo | e71bf0d | 2008-09-03 09:03:02 +0200 | [diff] [blame] | 364 | static void delete_partition_rcu_cb(struct rcu_head *head) |
| 365 | { |
| 366 | struct hd_struct *part = container_of(head, struct hd_struct, rcu_head); |
| 367 | |
| 368 | part->start_sect = 0; |
| 369 | part->nr_sects = 0; |
| 370 | part_stat_set_all(part, 0); |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 371 | put_device(part_to_dev(part)); |
Tejun Heo | e71bf0d | 2008-09-03 09:03:02 +0200 | [diff] [blame] | 372 | } |
| 373 | |
Tejun Heo | cf771cb | 2008-09-03 09:01:09 +0200 | [diff] [blame] | 374 | void delete_partition(struct gendisk *disk, int partno) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | { |
Tejun Heo | 540eed5 | 2008-08-25 19:56:15 +0900 | [diff] [blame] | 376 | struct disk_part_tbl *ptbl = disk->part_tbl; |
Tejun Heo | e71bf0d | 2008-09-03 09:03:02 +0200 | [diff] [blame] | 377 | struct hd_struct *part; |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 378 | |
Tejun Heo | 540eed5 | 2008-08-25 19:56:15 +0900 | [diff] [blame] | 379 | if (partno >= ptbl->len) |
| 380 | return; |
| 381 | |
| 382 | part = ptbl->part[partno]; |
Tejun Heo | e71bf0d | 2008-09-03 09:03:02 +0200 | [diff] [blame] | 383 | if (!part) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | return; |
Tejun Heo | e71bf0d | 2008-09-03 09:03:02 +0200 | [diff] [blame] | 385 | |
Tejun Heo | bcce3de | 2008-08-25 19:47:22 +0900 | [diff] [blame] | 386 | blk_free_devt(part_devt(part)); |
Tejun Heo | 540eed5 | 2008-08-25 19:56:15 +0900 | [diff] [blame] | 387 | rcu_assign_pointer(ptbl->part[partno], NULL); |
Neil Brown | 54b0d12 | 2009-01-07 08:55:39 +0100 | [diff] [blame] | 388 | rcu_assign_pointer(ptbl->last_lookup, NULL); |
Tejun Heo | e71bf0d | 2008-09-03 09:03:02 +0200 | [diff] [blame] | 389 | kobject_put(part->holder_dir); |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 390 | device_del(part_to_dev(part)); |
Tejun Heo | e71bf0d | 2008-09-03 09:03:02 +0200 | [diff] [blame] | 391 | |
| 392 | call_rcu(&part->rcu_head, delete_partition_rcu_cb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | } |
| 394 | |
Greg Kroah-Hartman | f4a00a2 | 2008-02-06 23:33:39 -0800 | [diff] [blame] | 395 | static ssize_t whole_disk_show(struct device *dev, |
| 396 | struct device_attribute *attr, char *buf) |
| 397 | { |
| 398 | return 0; |
| 399 | } |
| 400 | static DEVICE_ATTR(whole_disk, S_IRUSR | S_IRGRP | S_IROTH, |
| 401 | whole_disk_show, NULL); |
| 402 | |
Tejun Heo | ba32929 | 2008-11-10 15:29:58 +0900 | [diff] [blame] | 403 | struct hd_struct *add_partition(struct gendisk *disk, int partno, |
| 404 | sector_t start, sector_t len, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | { |
| 406 | struct hd_struct *p; |
Tejun Heo | bcce3de | 2008-08-25 19:47:22 +0900 | [diff] [blame] | 407 | dev_t devt = MKDEV(0, 0); |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 408 | struct device *ddev = disk_to_dev(disk); |
| 409 | struct device *pdev; |
Tejun Heo | 540eed5 | 2008-08-25 19:56:15 +0900 | [diff] [blame] | 410 | struct disk_part_tbl *ptbl; |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 411 | const char *dname; |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 412 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | |
Tejun Heo | 540eed5 | 2008-08-25 19:56:15 +0900 | [diff] [blame] | 414 | err = disk_expand_part_tbl(disk, partno); |
| 415 | if (err) |
Tejun Heo | ba32929 | 2008-11-10 15:29:58 +0900 | [diff] [blame] | 416 | return ERR_PTR(err); |
Tejun Heo | 540eed5 | 2008-08-25 19:56:15 +0900 | [diff] [blame] | 417 | ptbl = disk->part_tbl; |
| 418 | |
| 419 | if (ptbl->part[partno]) |
Tejun Heo | ba32929 | 2008-11-10 15:29:58 +0900 | [diff] [blame] | 420 | return ERR_PTR(-EBUSY); |
Tejun Heo | 88e3412 | 2008-08-25 19:30:16 +0900 | [diff] [blame] | 421 | |
Yoann Padioleau | dd00cc4 | 2007-07-19 01:49:03 -0700 | [diff] [blame] | 422 | p = kzalloc(sizeof(*p), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | if (!p) |
Tejun Heo | ba32929 | 2008-11-10 15:29:58 +0900 | [diff] [blame] | 424 | return ERR_PTR(-EBUSY); |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 425 | |
Jerome Marchand | 6f2576a | 2008-02-08 11:04:35 +0100 | [diff] [blame] | 426 | if (!init_part_stats(p)) { |
Abdel Benamrouche | d805dda | 2008-07-25 01:48:25 -0700 | [diff] [blame] | 427 | err = -ENOMEM; |
Tejun Heo | 88e3412 | 2008-08-25 19:30:16 +0900 | [diff] [blame] | 428 | goto out_free; |
Jerome Marchand | 6f2576a | 2008-02-08 11:04:35 +0100 | [diff] [blame] | 429 | } |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 430 | pdev = part_to_dev(p); |
| 431 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | p->start_sect = start; |
Martin K. Petersen | e03a72e | 2010-01-11 03:21:51 -0500 | [diff] [blame] | 433 | p->alignment_offset = |
| 434 | queue_limit_alignment_offset(&disk->queue->limits, start); |
| 435 | p->discard_alignment = |
| 436 | queue_limit_discard_alignment(&disk->queue->limits, start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | p->nr_sects = len; |
Tejun Heo | cf771cb | 2008-09-03 09:01:09 +0200 | [diff] [blame] | 438 | p->partno = partno; |
Tejun Heo | b7db995 | 2008-08-25 19:56:10 +0900 | [diff] [blame] | 439 | p->policy = get_disk_ro(disk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 441 | dname = dev_name(ddev); |
| 442 | if (isdigit(dname[strlen(dname) - 1])) |
Kay Sievers | 3ada8b7 | 2009-01-06 10:44:43 -0800 | [diff] [blame] | 443 | dev_set_name(pdev, "%sp%d", dname, partno); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | else |
Kay Sievers | 3ada8b7 | 2009-01-06 10:44:43 -0800 | [diff] [blame] | 445 | dev_set_name(pdev, "%s%d", dname, partno); |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 446 | |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 447 | device_initialize(pdev); |
| 448 | pdev->class = &block_class; |
| 449 | pdev->type = &part_type; |
| 450 | pdev->parent = ddev; |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 451 | |
Tejun Heo | bcce3de | 2008-08-25 19:47:22 +0900 | [diff] [blame] | 452 | err = blk_alloc_devt(p, &devt); |
| 453 | if (err) |
Tejun Heo | eb60fa1 | 2008-11-10 15:28:59 +0900 | [diff] [blame] | 454 | goto out_free_stats; |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 455 | pdev->devt = devt; |
Tejun Heo | bcce3de | 2008-08-25 19:47:22 +0900 | [diff] [blame] | 456 | |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 457 | /* delay uevent until 'holders' subdir is created */ |
Ming Lei | f67f129 | 2009-03-01 21:10:49 +0800 | [diff] [blame] | 458 | dev_set_uevent_suppress(pdev, 1); |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 459 | err = device_add(pdev); |
Abdel Benamrouche | d805dda | 2008-07-25 01:48:25 -0700 | [diff] [blame] | 460 | if (err) |
Tejun Heo | 88e3412 | 2008-08-25 19:30:16 +0900 | [diff] [blame] | 461 | goto out_put; |
| 462 | |
| 463 | err = -ENOMEM; |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 464 | p->holder_dir = kobject_create_and_add("holders", &pdev->kobj); |
Tejun Heo | 88e3412 | 2008-08-25 19:30:16 +0900 | [diff] [blame] | 465 | if (!p->holder_dir) |
| 466 | goto out_del; |
| 467 | |
Ming Lei | f67f129 | 2009-03-01 21:10:49 +0800 | [diff] [blame] | 468 | dev_set_uevent_suppress(pdev, 0); |
Abdel Benamrouche | d805dda | 2008-07-25 01:48:25 -0700 | [diff] [blame] | 469 | if (flags & ADDPART_FLAG_WHOLEDISK) { |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 470 | err = device_create_file(pdev, &dev_attr_whole_disk); |
Abdel Benamrouche | d805dda | 2008-07-25 01:48:25 -0700 | [diff] [blame] | 471 | if (err) |
Tejun Heo | 88e3412 | 2008-08-25 19:30:16 +0900 | [diff] [blame] | 472 | goto out_del; |
Abdel Benamrouche | d805dda | 2008-07-25 01:48:25 -0700 | [diff] [blame] | 473 | } |
Jeff Garzik | eee44cc | 2006-10-17 00:10:23 -0700 | [diff] [blame] | 474 | |
Tejun Heo | 88e3412 | 2008-08-25 19:30:16 +0900 | [diff] [blame] | 475 | /* everything is up and running, commence */ |
Tejun Heo | 540eed5 | 2008-08-25 19:56:15 +0900 | [diff] [blame] | 476 | rcu_assign_pointer(ptbl->part[partno], p); |
Tejun Heo | 88e3412 | 2008-08-25 19:30:16 +0900 | [diff] [blame] | 477 | |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 478 | /* suppress uevent if the disk supresses it */ |
Heiko Carstens | f8c73c7 | 2009-06-11 15:14:40 +0200 | [diff] [blame] | 479 | if (!dev_get_uevent_suppress(ddev)) |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 480 | kobject_uevent(&pdev->kobj, KOBJ_ADD); |
Abdel Benamrouche | d805dda | 2008-07-25 01:48:25 -0700 | [diff] [blame] | 481 | |
Tejun Heo | ba32929 | 2008-11-10 15:29:58 +0900 | [diff] [blame] | 482 | return p; |
Abdel Benamrouche | d805dda | 2008-07-25 01:48:25 -0700 | [diff] [blame] | 483 | |
Tejun Heo | eb60fa1 | 2008-11-10 15:28:59 +0900 | [diff] [blame] | 484 | out_free_stats: |
| 485 | free_part_stats(p); |
Tejun Heo | 88e3412 | 2008-08-25 19:30:16 +0900 | [diff] [blame] | 486 | out_free: |
Abdel Benamrouche | d805dda | 2008-07-25 01:48:25 -0700 | [diff] [blame] | 487 | kfree(p); |
Tejun Heo | ba32929 | 2008-11-10 15:29:58 +0900 | [diff] [blame] | 488 | return ERR_PTR(err); |
Tejun Heo | 88e3412 | 2008-08-25 19:30:16 +0900 | [diff] [blame] | 489 | out_del: |
| 490 | kobject_put(p->holder_dir); |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 491 | device_del(pdev); |
Tejun Heo | 88e3412 | 2008-08-25 19:30:16 +0900 | [diff] [blame] | 492 | out_put: |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 493 | put_device(pdev); |
Tejun Heo | bcce3de | 2008-08-25 19:47:22 +0900 | [diff] [blame] | 494 | blk_free_devt(devt); |
Tejun Heo | ba32929 | 2008-11-10 15:29:58 +0900 | [diff] [blame] | 495 | return ERR_PTR(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | } |
| 497 | |
| 498 | /* Not exported, helper to add_disk(). */ |
| 499 | void register_disk(struct gendisk *disk) |
| 500 | { |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 501 | struct device *ddev = disk_to_dev(disk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | struct block_device *bdev; |
Tejun Heo | e71bf0d | 2008-09-03 09:03:02 +0200 | [diff] [blame] | 503 | struct disk_part_iter piter; |
| 504 | struct hd_struct *part; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | int err; |
| 506 | |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 507 | ddev->parent = disk->driverfs_dev; |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 508 | |
Kay Sievers | 3ada8b7 | 2009-01-06 10:44:43 -0800 | [diff] [blame] | 509 | dev_set_name(ddev, disk->disk_name); |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 510 | |
| 511 | /* delay uevents, until we scanned partition table */ |
Ming Lei | f67f129 | 2009-03-01 21:10:49 +0800 | [diff] [blame] | 512 | dev_set_uevent_suppress(ddev, 1); |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 513 | |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 514 | if (device_add(ddev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | return; |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 516 | #ifndef CONFIG_SYSFS_DEPRECATED |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 517 | err = sysfs_create_link(block_depr, &ddev->kobj, |
| 518 | kobject_name(&ddev->kobj)); |
Jeff Garzik | eee44cc | 2006-10-17 00:10:23 -0700 | [diff] [blame] | 519 | if (err) { |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 520 | device_del(ddev); |
Jeff Garzik | eee44cc | 2006-10-17 00:10:23 -0700 | [diff] [blame] | 521 | return; |
| 522 | } |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 523 | #endif |
Tejun Heo | 4c46501 | 2008-08-25 19:56:11 +0900 | [diff] [blame] | 524 | disk->part0.holder_dir = kobject_create_and_add("holders", &ddev->kobj); |
| 525 | disk->slave_dir = kobject_create_and_add("slaves", &ddev->kobj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | |
| 527 | /* No minors to use for partitions */ |
Tejun Heo | b5d0b9d | 2008-09-03 09:06:42 +0200 | [diff] [blame] | 528 | if (!disk_partitionable(disk)) |
Kay Sievers | d4d7e5d | 2006-03-24 20:45:35 +0100 | [diff] [blame] | 529 | goto exit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | |
| 531 | /* No such device (e.g., media were just removed) */ |
| 532 | if (!get_capacity(disk)) |
Kay Sievers | d4d7e5d | 2006-03-24 20:45:35 +0100 | [diff] [blame] | 533 | goto exit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | |
| 535 | bdev = bdget_disk(disk, 0); |
| 536 | if (!bdev) |
Kay Sievers | d4d7e5d | 2006-03-24 20:45:35 +0100 | [diff] [blame] | 537 | goto exit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | |
| 539 | bdev->bd_invalidated = 1; |
Al Viro | 572c489 | 2007-10-08 13:24:05 -0400 | [diff] [blame] | 540 | err = blkdev_get(bdev, FMODE_READ); |
Kay Sievers | d4d7e5d | 2006-03-24 20:45:35 +0100 | [diff] [blame] | 541 | if (err < 0) |
| 542 | goto exit; |
Al Viro | 9a1c354 | 2008-02-22 20:40:24 -0500 | [diff] [blame] | 543 | blkdev_put(bdev, FMODE_READ); |
Kay Sievers | d4d7e5d | 2006-03-24 20:45:35 +0100 | [diff] [blame] | 544 | |
| 545 | exit: |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 546 | /* announce disk after possible partitions are created */ |
Ming Lei | f67f129 | 2009-03-01 21:10:49 +0800 | [diff] [blame] | 547 | dev_set_uevent_suppress(ddev, 0); |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 548 | kobject_uevent(&ddev->kobj, KOBJ_ADD); |
Kay Sievers | d4d7e5d | 2006-03-24 20:45:35 +0100 | [diff] [blame] | 549 | |
| 550 | /* announce possible partitions */ |
Tejun Heo | e71bf0d | 2008-09-03 09:03:02 +0200 | [diff] [blame] | 551 | disk_part_iter_init(&piter, disk, 0); |
| 552 | while ((part = disk_part_iter_next(&piter))) |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 553 | kobject_uevent(&part_to_dev(part)->kobj, KOBJ_ADD); |
Tejun Heo | e71bf0d | 2008-09-03 09:03:02 +0200 | [diff] [blame] | 554 | disk_part_iter_exit(&piter); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | } |
| 556 | |
Tejun Heo | b403a98 | 2010-05-15 20:09:31 +0200 | [diff] [blame] | 557 | static bool disk_unlock_native_capacity(struct gendisk *disk) |
| 558 | { |
| 559 | const struct block_device_operations *bdops = disk->fops; |
| 560 | |
| 561 | if (bdops->unlock_native_capacity && |
| 562 | !(disk->flags & GENHD_FL_NATIVE_CAPACITY)) { |
| 563 | printk(KERN_CONT "enabling native capacity\n"); |
| 564 | bdops->unlock_native_capacity(disk); |
| 565 | disk->flags |= GENHD_FL_NATIVE_CAPACITY; |
| 566 | return true; |
| 567 | } else { |
| 568 | printk(KERN_CONT "truncated\n"); |
| 569 | return false; |
| 570 | } |
| 571 | } |
| 572 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | int rescan_partitions(struct gendisk *disk, struct block_device *bdev) |
| 574 | { |
Tejun Heo | b403a98 | 2010-05-15 20:09:31 +0200 | [diff] [blame] | 575 | struct parsed_partitions *state = NULL; |
Tejun Heo | e71bf0d | 2008-09-03 09:03:02 +0200 | [diff] [blame] | 576 | struct disk_part_iter piter; |
| 577 | struct hd_struct *part; |
Tejun Heo | 540eed5 | 2008-08-25 19:56:15 +0900 | [diff] [blame] | 578 | int p, highest, res; |
Tejun Heo | 56bca01 | 2010-05-15 20:09:28 +0200 | [diff] [blame] | 579 | rescan: |
Tejun Heo | b403a98 | 2010-05-15 20:09:31 +0200 | [diff] [blame] | 580 | if (state && !IS_ERR(state)) { |
| 581 | kfree(state); |
| 582 | state = NULL; |
| 583 | } |
| 584 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | if (bdev->bd_part_count) |
| 586 | return -EBUSY; |
| 587 | res = invalidate_partition(disk, 0); |
| 588 | if (res) |
| 589 | return res; |
Tejun Heo | e71bf0d | 2008-09-03 09:03:02 +0200 | [diff] [blame] | 590 | |
| 591 | disk_part_iter_init(&piter, disk, DISK_PITER_INCL_EMPTY); |
| 592 | while ((part = disk_part_iter_next(&piter))) |
| 593 | delete_partition(disk, part->partno); |
| 594 | disk_part_iter_exit(&piter); |
| 595 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | if (disk->fops->revalidate_disk) |
| 597 | disk->fops->revalidate_disk(disk); |
Andrew Patterson | 9bc3ffb | 2008-09-04 14:27:30 -0600 | [diff] [blame] | 598 | check_disk_size_change(disk, bdev); |
| 599 | bdev->bd_invalidated = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | if (!get_capacity(disk) || !(state = check_partition(disk, bdev))) |
| 601 | return 0; |
Tejun Heo | b403a98 | 2010-05-15 20:09:31 +0200 | [diff] [blame] | 602 | if (IS_ERR(state)) { |
| 603 | /* |
| 604 | * I/O error reading the partition table. If any |
| 605 | * partition code tried to read beyond EOD, retry |
| 606 | * after unlocking native capacity. |
| 607 | */ |
| 608 | if (PTR_ERR(state) == -ENOSPC) { |
| 609 | printk(KERN_WARNING "%s: partition table beyond EOD, ", |
| 610 | disk->disk_name); |
| 611 | if (disk_unlock_native_capacity(disk)) |
| 612 | goto rescan; |
| 613 | } |
suzuki | b74a2f0 | 2007-03-16 13:38:25 -0800 | [diff] [blame] | 614 | return -EIO; |
Tejun Heo | b403a98 | 2010-05-15 20:09:31 +0200 | [diff] [blame] | 615 | } |
| 616 | /* |
| 617 | * If any partition code tried to read beyond EOD, try |
| 618 | * unlocking native capacity even if partition table is |
| 619 | * sucessfully read as we could be missing some partitions. |
| 620 | */ |
| 621 | if (state->access_beyond_eod) { |
| 622 | printk(KERN_WARNING |
| 623 | "%s: partition table partially beyond EOD, ", |
| 624 | disk->disk_name); |
| 625 | if (disk_unlock_native_capacity(disk)) |
| 626 | goto rescan; |
| 627 | } |
Kay Sievers | 6bcf19d | 2008-03-09 21:26:02 +0100 | [diff] [blame] | 628 | |
| 629 | /* tell userspace that the media / partition table may have changed */ |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 630 | kobject_uevent(&disk_to_dev(disk)->kobj, KOBJ_CHANGE); |
Kay Sievers | 6bcf19d | 2008-03-09 21:26:02 +0100 | [diff] [blame] | 631 | |
Tejun Heo | 540eed5 | 2008-08-25 19:56:15 +0900 | [diff] [blame] | 632 | /* Detect the highest partition number and preallocate |
| 633 | * disk->part_tbl. This is an optimization and not strictly |
| 634 | * necessary. |
| 635 | */ |
| 636 | for (p = 1, highest = 0; p < state->limit; p++) |
| 637 | if (state->parts[p].size) |
| 638 | highest = p; |
| 639 | |
| 640 | disk_expand_part_tbl(disk, highest); |
| 641 | |
| 642 | /* add partitions */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | for (p = 1; p < state->limit; p++) { |
Bartlomiej Zolnierkiewicz | db429e9 | 2009-06-07 13:52:52 +0200 | [diff] [blame] | 644 | sector_t size, from; |
Tejun Heo | 56bca01 | 2010-05-15 20:09:28 +0200 | [diff] [blame] | 645 | |
Bartlomiej Zolnierkiewicz | db429e9 | 2009-06-07 13:52:52 +0200 | [diff] [blame] | 646 | size = state->parts[p].size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | if (!size) |
| 648 | continue; |
Bartlomiej Zolnierkiewicz | db429e9 | 2009-06-07 13:52:52 +0200 | [diff] [blame] | 649 | |
| 650 | from = state->parts[p].from; |
Kay Sievers | ac0d86f | 2008-10-15 22:04:21 -0700 | [diff] [blame] | 651 | if (from >= get_capacity(disk)) { |
Andrew Morton | 8d99f83 | 2008-09-13 02:33:25 -0700 | [diff] [blame] | 652 | printk(KERN_WARNING |
Tejun Heo | b403a98 | 2010-05-15 20:09:31 +0200 | [diff] [blame] | 653 | "%s: p%d start %llu is beyond EOD, ", |
Kay Sievers | ac0d86f | 2008-10-15 22:04:21 -0700 | [diff] [blame] | 654 | disk->disk_name, p, (unsigned long long) from); |
Tejun Heo | b403a98 | 2010-05-15 20:09:31 +0200 | [diff] [blame] | 655 | if (disk_unlock_native_capacity(disk)) |
| 656 | goto rescan; |
Kay Sievers | ac0d86f | 2008-10-15 22:04:21 -0700 | [diff] [blame] | 657 | continue; |
| 658 | } |
Bartlomiej Zolnierkiewicz | db429e9 | 2009-06-07 13:52:52 +0200 | [diff] [blame] | 659 | |
Kay Sievers | ac0d86f | 2008-10-15 22:04:21 -0700 | [diff] [blame] | 660 | if (from + size > get_capacity(disk)) { |
Kay Sievers | ac0d86f | 2008-10-15 22:04:21 -0700 | [diff] [blame] | 661 | printk(KERN_WARNING |
Tejun Heo | b403a98 | 2010-05-15 20:09:31 +0200 | [diff] [blame] | 662 | "%s: p%d size %llu extends beyond EOD, ", |
Kay Sievers | ac0d86f | 2008-10-15 22:04:21 -0700 | [diff] [blame] | 663 | disk->disk_name, p, (unsigned long long) size); |
Bartlomiej Zolnierkiewicz | db429e9 | 2009-06-07 13:52:52 +0200 | [diff] [blame] | 664 | |
Tejun Heo | b403a98 | 2010-05-15 20:09:31 +0200 | [diff] [blame] | 665 | if (disk_unlock_native_capacity(disk)) { |
Tejun Heo | 56bca01 | 2010-05-15 20:09:28 +0200 | [diff] [blame] | 666 | /* free state and restart */ |
Tejun Heo | 56bca01 | 2010-05-15 20:09:28 +0200 | [diff] [blame] | 667 | goto rescan; |
Bartlomiej Zolnierkiewicz | db429e9 | 2009-06-07 13:52:52 +0200 | [diff] [blame] | 668 | } else { |
| 669 | /* |
| 670 | * we can not ignore partitions of broken tables |
| 671 | * created by for example camera firmware, but |
| 672 | * we limit them to the end of the disk to avoid |
| 673 | * creating invalid block devices |
| 674 | */ |
Bartlomiej Zolnierkiewicz | db429e9 | 2009-06-07 13:52:52 +0200 | [diff] [blame] | 675 | size = get_capacity(disk) - from; |
| 676 | } |
Mike Miller | 98bd34e | 2006-06-23 02:06:07 -0700 | [diff] [blame] | 677 | } |
Tejun Heo | ba32929 | 2008-11-10 15:29:58 +0900 | [diff] [blame] | 678 | part = add_partition(disk, p, from, size, |
| 679 | state->parts[p].flags); |
| 680 | if (IS_ERR(part)) { |
| 681 | printk(KERN_ERR " %s: p%d could not be added: %ld\n", |
| 682 | disk->disk_name, p, -PTR_ERR(part)); |
Abdel Benamrouche | 04ebd4a | 2008-07-25 01:48:26 -0700 | [diff] [blame] | 683 | continue; |
| 684 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | #ifdef CONFIG_BLK_DEV_MD |
Fabio Massimo Di Nitto | d18d768 | 2007-02-10 23:50:00 -0800 | [diff] [blame] | 686 | if (state->parts[p].flags & ADDPART_FLAG_RAID) |
Tejun Heo | 55e8e30 | 2008-11-10 15:30:47 +0900 | [diff] [blame] | 687 | md_autodetect_dev(part_to_dev(part)->devt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | #endif |
| 689 | } |
| 690 | kfree(state); |
| 691 | return 0; |
| 692 | } |
| 693 | |
| 694 | unsigned char *read_dev_sector(struct block_device *bdev, sector_t n, Sector *p) |
| 695 | { |
| 696 | struct address_space *mapping = bdev->bd_inode->i_mapping; |
| 697 | struct page *page; |
| 698 | |
Pekka Enberg | 090d2b1 | 2006-06-23 02:05:08 -0700 | [diff] [blame] | 699 | page = read_mapping_page(mapping, (pgoff_t)(n >> (PAGE_CACHE_SHIFT-9)), |
| 700 | NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | if (!IS_ERR(page)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | if (PageError(page)) |
| 703 | goto fail; |
| 704 | p->v = page; |
| 705 | return (unsigned char *)page_address(page) + ((n & ((1 << (PAGE_CACHE_SHIFT - 9)) - 1)) << 9); |
| 706 | fail: |
| 707 | page_cache_release(page); |
| 708 | } |
| 709 | p->v = NULL; |
| 710 | return NULL; |
| 711 | } |
| 712 | |
| 713 | EXPORT_SYMBOL(read_dev_sector); |
| 714 | |
| 715 | void del_gendisk(struct gendisk *disk) |
| 716 | { |
Tejun Heo | e71bf0d | 2008-09-03 09:03:02 +0200 | [diff] [blame] | 717 | struct disk_part_iter piter; |
| 718 | struct hd_struct *part; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | |
| 720 | /* invalidate stuff */ |
Tejun Heo | e71bf0d | 2008-09-03 09:03:02 +0200 | [diff] [blame] | 721 | disk_part_iter_init(&piter, disk, |
| 722 | DISK_PITER_INCL_EMPTY | DISK_PITER_REVERSE); |
| 723 | while ((part = disk_part_iter_next(&piter))) { |
| 724 | invalidate_partition(disk, part->partno); |
| 725 | delete_partition(disk, part->partno); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | } |
Tejun Heo | e71bf0d | 2008-09-03 09:03:02 +0200 | [diff] [blame] | 727 | disk_part_iter_exit(&piter); |
| 728 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | invalidate_partition(disk, 0); |
Tejun Heo | 3e1a7ff | 2008-08-25 19:56:17 +0900 | [diff] [blame] | 730 | blk_free_devt(disk_to_dev(disk)->devt); |
Tejun Heo | 80795ae | 2008-08-25 19:56:07 +0900 | [diff] [blame] | 731 | set_capacity(disk, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | disk->flags &= ~GENHD_FL_UP; |
| 733 | unlink_gendisk(disk); |
Tejun Heo | 074a7ac | 2008-08-25 19:56:14 +0900 | [diff] [blame] | 734 | part_stat_set_all(&disk->part0, 0); |
| 735 | disk->part0.stamp = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | |
Tejun Heo | 4c46501 | 2008-08-25 19:56:11 +0900 | [diff] [blame] | 737 | kobject_put(disk->part0.holder_dir); |
Greg Kroah-Hartman | 197b12d | 2007-12-20 08:13:05 -0800 | [diff] [blame] | 738 | kobject_put(disk->slave_dir); |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 739 | disk->driverfs_dev = NULL; |
| 740 | #ifndef CONFIG_SYSFS_DEPRECATED |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 741 | sysfs_remove_link(block_depr, dev_name(disk_to_dev(disk))); |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 742 | #endif |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 743 | device_del(disk_to_dev(disk)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | } |