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 | |
Kay Sievers | 34db1d5 | 2010-11-11 09:58:57 +0100 | [diff] [blame] | 240 | ssize_t part_ro_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, "%d\n", p->policy ? 1 : 0); |
| 245 | } |
| 246 | |
Martin K. Petersen | c72758f | 2009-05-22 17:17:53 -0400 | [diff] [blame] | 247 | ssize_t part_alignment_offset_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, "%llu\n", (unsigned long long)p->alignment_offset); |
| 252 | } |
| 253 | |
Martin K. Petersen | 86b3728 | 2009-11-10 11:50:21 +0100 | [diff] [blame] | 254 | ssize_t part_discard_alignment_show(struct device *dev, |
| 255 | struct device_attribute *attr, char *buf) |
| 256 | { |
| 257 | struct hd_struct *p = dev_to_part(dev); |
Tao Ma | 23ceb5b | 2011-05-06 19:30:02 -0600 | [diff] [blame] | 258 | struct gendisk *disk = dev_to_disk(dev); |
Jens Axboe | f4fa342 | 2011-05-26 21:01:38 +0200 | [diff] [blame] | 259 | unsigned int alignment = 0; |
Tao Ma | 23ceb5b | 2011-05-06 19:30:02 -0600 | [diff] [blame] | 260 | |
Jens Axboe | f4fa342 | 2011-05-26 21:01:38 +0200 | [diff] [blame] | 261 | if (disk->queue) |
| 262 | alignment = queue_limit_discard_alignment(&disk->queue->limits, |
| 263 | p->start_sect); |
| 264 | return sprintf(buf, "%u\n", alignment); |
Martin K. Petersen | 86b3728 | 2009-11-10 11:50:21 +0100 | [diff] [blame] | 265 | } |
| 266 | |
Tejun Heo | 074a7ac | 2008-08-25 19:56:14 +0900 | [diff] [blame] | 267 | ssize_t part_stat_show(struct device *dev, |
| 268 | struct device_attribute *attr, char *buf) |
Kay Sievers | a7fd670 | 2005-10-01 14:49:43 +0200 | [diff] [blame] | 269 | { |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 270 | struct hd_struct *p = dev_to_part(dev); |
Tejun Heo | c995905 | 2008-08-25 19:47:21 +0900 | [diff] [blame] | 271 | int cpu; |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 272 | |
Tejun Heo | 074a7ac | 2008-08-25 19:56:14 +0900 | [diff] [blame] | 273 | cpu = part_stat_lock(); |
Tejun Heo | c995905 | 2008-08-25 19:47:21 +0900 | [diff] [blame] | 274 | part_round_stats(cpu, p); |
Tejun Heo | 074a7ac | 2008-08-25 19:56:14 +0900 | [diff] [blame] | 275 | part_stat_unlock(); |
Jerome Marchand | 34e8bea | 2008-02-08 11:04:55 +0100 | [diff] [blame] | 276 | return sprintf(buf, |
| 277 | "%8lu %8lu %8llu %8u " |
| 278 | "%8lu %8lu %8llu %8u " |
| 279 | "%8u %8u %8u" |
| 280 | "\n", |
| 281 | part_stat_read(p, ios[READ]), |
| 282 | part_stat_read(p, merges[READ]), |
| 283 | (unsigned long long)part_stat_read(p, sectors[READ]), |
| 284 | jiffies_to_msecs(part_stat_read(p, ticks[READ])), |
| 285 | part_stat_read(p, ios[WRITE]), |
| 286 | part_stat_read(p, merges[WRITE]), |
| 287 | (unsigned long long)part_stat_read(p, sectors[WRITE]), |
| 288 | jiffies_to_msecs(part_stat_read(p, ticks[WRITE])), |
Nikanth Karthikesan | 316d315 | 2009-10-06 20:16:55 +0200 | [diff] [blame] | 289 | part_in_flight(p), |
Jerome Marchand | 34e8bea | 2008-02-08 11:04:55 +0100 | [diff] [blame] | 290 | jiffies_to_msecs(part_stat_read(p, io_ticks)), |
| 291 | jiffies_to_msecs(part_stat_read(p, time_in_queue))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | |
Nikanth Karthikesan | 316d315 | 2009-10-06 20:16:55 +0200 | [diff] [blame] | 294 | ssize_t part_inflight_show(struct device *dev, |
| 295 | struct device_attribute *attr, char *buf) |
| 296 | { |
| 297 | struct hd_struct *p = dev_to_part(dev); |
| 298 | |
Shaohua Li | 1e9bb88 | 2011-03-22 08:35:35 +0100 | [diff] [blame] | 299 | return sprintf(buf, "%8u %8u\n", atomic_read(&p->in_flight[0]), |
| 300 | atomic_read(&p->in_flight[1])); |
Nikanth Karthikesan | 316d315 | 2009-10-06 20:16:55 +0200 | [diff] [blame] | 301 | } |
| 302 | |
Akinobu Mita | c17bb49 | 2006-12-08 02:39:46 -0800 | [diff] [blame] | 303 | #ifdef CONFIG_FAIL_MAKE_REQUEST |
Tejun Heo | eddb2e2 | 2008-08-25 19:56:13 +0900 | [diff] [blame] | 304 | ssize_t part_fail_show(struct device *dev, |
| 305 | struct device_attribute *attr, char *buf) |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 306 | { |
| 307 | struct hd_struct *p = dev_to_part(dev); |
Akinobu Mita | c17bb49 | 2006-12-08 02:39:46 -0800 | [diff] [blame] | 308 | |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 309 | return sprintf(buf, "%d\n", p->make_it_fail); |
| 310 | } |
| 311 | |
Tejun Heo | eddb2e2 | 2008-08-25 19:56:13 +0900 | [diff] [blame] | 312 | ssize_t part_fail_store(struct device *dev, |
| 313 | struct device_attribute *attr, |
| 314 | const char *buf, size_t count) |
Akinobu Mita | c17bb49 | 2006-12-08 02:39:46 -0800 | [diff] [blame] | 315 | { |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 316 | struct hd_struct *p = dev_to_part(dev); |
Akinobu Mita | c17bb49 | 2006-12-08 02:39:46 -0800 | [diff] [blame] | 317 | int i; |
| 318 | |
| 319 | if (count > 0 && sscanf(buf, "%d", &i) > 0) |
| 320 | p->make_it_fail = (i == 0) ? 0 : 1; |
| 321 | |
| 322 | return count; |
| 323 | } |
Akinobu Mita | c17bb49 | 2006-12-08 02:39:46 -0800 | [diff] [blame] | 324 | #endif |
| 325 | |
Tejun Heo | 0fc71e3 | 2008-10-13 13:27:59 +0200 | [diff] [blame] | 326 | static DEVICE_ATTR(partition, S_IRUGO, part_partition_show, NULL); |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 327 | static DEVICE_ATTR(start, S_IRUGO, part_start_show, NULL); |
| 328 | static DEVICE_ATTR(size, S_IRUGO, part_size_show, NULL); |
Kay Sievers | 34db1d5 | 2010-11-11 09:58:57 +0100 | [diff] [blame] | 329 | static DEVICE_ATTR(ro, S_IRUGO, part_ro_show, NULL); |
Martin K. Petersen | c72758f | 2009-05-22 17:17:53 -0400 | [diff] [blame] | 330 | 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] | 331 | static DEVICE_ATTR(discard_alignment, S_IRUGO, part_discard_alignment_show, |
| 332 | NULL); |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 333 | static DEVICE_ATTR(stat, S_IRUGO, part_stat_show, NULL); |
Nikanth Karthikesan | 316d315 | 2009-10-06 20:16:55 +0200 | [diff] [blame] | 334 | static DEVICE_ATTR(inflight, S_IRUGO, part_inflight_show, NULL); |
Akinobu Mita | c17bb49 | 2006-12-08 02:39:46 -0800 | [diff] [blame] | 335 | #ifdef CONFIG_FAIL_MAKE_REQUEST |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 336 | static struct device_attribute dev_attr_fail = |
| 337 | __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] | 338 | #endif |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 339 | |
| 340 | static struct attribute *part_attrs[] = { |
Tejun Heo | 0fc71e3 | 2008-10-13 13:27:59 +0200 | [diff] [blame] | 341 | &dev_attr_partition.attr, |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 342 | &dev_attr_start.attr, |
| 343 | &dev_attr_size.attr, |
Kay Sievers | 34db1d5 | 2010-11-11 09:58:57 +0100 | [diff] [blame] | 344 | &dev_attr_ro.attr, |
Martin K. Petersen | c72758f | 2009-05-22 17:17:53 -0400 | [diff] [blame] | 345 | &dev_attr_alignment_offset.attr, |
Martin K. Petersen | 86b3728 | 2009-11-10 11:50:21 +0100 | [diff] [blame] | 346 | &dev_attr_discard_alignment.attr, |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 347 | &dev_attr_stat.attr, |
Nikanth Karthikesan | 316d315 | 2009-10-06 20:16:55 +0200 | [diff] [blame] | 348 | &dev_attr_inflight.attr, |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 349 | #ifdef CONFIG_FAIL_MAKE_REQUEST |
| 350 | &dev_attr_fail.attr, |
| 351 | #endif |
| 352 | NULL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | }; |
| 354 | |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 355 | static struct attribute_group part_attr_group = { |
| 356 | .attrs = part_attrs, |
| 357 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | |
David Brownell | a4dbd67 | 2009-06-24 10:06:31 -0700 | [diff] [blame] | 359 | static const struct attribute_group *part_attr_groups[] = { |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 360 | &part_attr_group, |
Arnaldo Carvalho de Melo | c71a896 | 2009-01-23 12:06:27 -0200 | [diff] [blame] | 361 | #ifdef CONFIG_BLK_DEV_IO_TRACE |
| 362 | &blk_trace_attr_group, |
| 363 | #endif |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 364 | NULL |
| 365 | }; |
| 366 | |
| 367 | static void part_release(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | { |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 369 | struct hd_struct *p = dev_to_part(dev); |
Jerome Marchand | 6f2576a | 2008-02-08 11:04:35 +0100 | [diff] [blame] | 370 | free_part_stats(p); |
Will Drewry | 6d1d805 | 2010-08-31 15:47:05 -0500 | [diff] [blame] | 371 | free_part_info(p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | kfree(p); |
| 373 | } |
| 374 | |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 375 | struct device_type part_type = { |
| 376 | .name = "partition", |
| 377 | .groups = part_attr_groups, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | .release = part_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | }; |
| 380 | |
Tejun Heo | e71bf0d | 2008-09-03 09:03:02 +0200 | [diff] [blame] | 381 | static void delete_partition_rcu_cb(struct rcu_head *head) |
| 382 | { |
| 383 | struct hd_struct *part = container_of(head, struct hd_struct, rcu_head); |
| 384 | |
| 385 | part->start_sect = 0; |
| 386 | part->nr_sects = 0; |
| 387 | part_stat_set_all(part, 0); |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 388 | put_device(part_to_dev(part)); |
Tejun Heo | e71bf0d | 2008-09-03 09:03:02 +0200 | [diff] [blame] | 389 | } |
| 390 | |
Jens Axboe | 6c23a96 | 2011-01-07 08:43:37 +0100 | [diff] [blame] | 391 | void __delete_partition(struct hd_struct *part) |
Jerome Marchand | 09e099d | 2011-01-05 16:57:38 +0100 | [diff] [blame] | 392 | { |
Jerome Marchand | 09e099d | 2011-01-05 16:57:38 +0100 | [diff] [blame] | 393 | call_rcu(&part->rcu_head, delete_partition_rcu_cb); |
| 394 | } |
| 395 | |
Tejun Heo | cf771cb | 2008-09-03 09:01:09 +0200 | [diff] [blame] | 396 | void delete_partition(struct gendisk *disk, int partno) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | { |
Tejun Heo | 540eed5 | 2008-08-25 19:56:15 +0900 | [diff] [blame] | 398 | struct disk_part_tbl *ptbl = disk->part_tbl; |
Tejun Heo | e71bf0d | 2008-09-03 09:03:02 +0200 | [diff] [blame] | 399 | struct hd_struct *part; |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 400 | |
Tejun Heo | 540eed5 | 2008-08-25 19:56:15 +0900 | [diff] [blame] | 401 | if (partno >= ptbl->len) |
| 402 | return; |
| 403 | |
| 404 | part = ptbl->part[partno]; |
Tejun Heo | e71bf0d | 2008-09-03 09:03:02 +0200 | [diff] [blame] | 405 | if (!part) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | return; |
Tejun Heo | e71bf0d | 2008-09-03 09:03:02 +0200 | [diff] [blame] | 407 | |
Tejun Heo | bcce3de | 2008-08-25 19:47:22 +0900 | [diff] [blame] | 408 | blk_free_devt(part_devt(part)); |
Tejun Heo | 540eed5 | 2008-08-25 19:56:15 +0900 | [diff] [blame] | 409 | rcu_assign_pointer(ptbl->part[partno], NULL); |
Neil Brown | 54b0d12 | 2009-01-07 08:55:39 +0100 | [diff] [blame] | 410 | rcu_assign_pointer(ptbl->last_lookup, NULL); |
Tejun Heo | e71bf0d | 2008-09-03 09:03:02 +0200 | [diff] [blame] | 411 | kobject_put(part->holder_dir); |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 412 | device_del(part_to_dev(part)); |
Tejun Heo | e71bf0d | 2008-09-03 09:03:02 +0200 | [diff] [blame] | 413 | |
Jens Axboe | 6c23a96 | 2011-01-07 08:43:37 +0100 | [diff] [blame] | 414 | hd_struct_put(part); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | } |
| 416 | |
Greg Kroah-Hartman | f4a00a2 | 2008-02-06 23:33:39 -0800 | [diff] [blame] | 417 | static ssize_t whole_disk_show(struct device *dev, |
| 418 | struct device_attribute *attr, char *buf) |
| 419 | { |
| 420 | return 0; |
| 421 | } |
| 422 | static DEVICE_ATTR(whole_disk, S_IRUSR | S_IRGRP | S_IROTH, |
| 423 | whole_disk_show, NULL); |
| 424 | |
Tejun Heo | ba32929 | 2008-11-10 15:29:58 +0900 | [diff] [blame] | 425 | struct hd_struct *add_partition(struct gendisk *disk, int partno, |
Will Drewry | 6d1d805 | 2010-08-31 15:47:05 -0500 | [diff] [blame] | 426 | sector_t start, sector_t len, int flags, |
| 427 | struct partition_meta_info *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | { |
| 429 | struct hd_struct *p; |
Tejun Heo | bcce3de | 2008-08-25 19:47:22 +0900 | [diff] [blame] | 430 | dev_t devt = MKDEV(0, 0); |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 431 | struct device *ddev = disk_to_dev(disk); |
| 432 | struct device *pdev; |
Tejun Heo | 540eed5 | 2008-08-25 19:56:15 +0900 | [diff] [blame] | 433 | struct disk_part_tbl *ptbl; |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 434 | const char *dname; |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 435 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | |
Tejun Heo | 540eed5 | 2008-08-25 19:56:15 +0900 | [diff] [blame] | 437 | err = disk_expand_part_tbl(disk, partno); |
| 438 | if (err) |
Tejun Heo | ba32929 | 2008-11-10 15:29:58 +0900 | [diff] [blame] | 439 | return ERR_PTR(err); |
Tejun Heo | 540eed5 | 2008-08-25 19:56:15 +0900 | [diff] [blame] | 440 | ptbl = disk->part_tbl; |
| 441 | |
| 442 | if (ptbl->part[partno]) |
Tejun Heo | ba32929 | 2008-11-10 15:29:58 +0900 | [diff] [blame] | 443 | return ERR_PTR(-EBUSY); |
Tejun Heo | 88e3412 | 2008-08-25 19:30:16 +0900 | [diff] [blame] | 444 | |
Yoann Padioleau | dd00cc4 | 2007-07-19 01:49:03 -0700 | [diff] [blame] | 445 | p = kzalloc(sizeof(*p), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | if (!p) |
Tejun Heo | ba32929 | 2008-11-10 15:29:58 +0900 | [diff] [blame] | 447 | return ERR_PTR(-EBUSY); |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 448 | |
Jerome Marchand | 6f2576a | 2008-02-08 11:04:35 +0100 | [diff] [blame] | 449 | if (!init_part_stats(p)) { |
Abdel Benamrouche | d805dda | 2008-07-25 01:48:25 -0700 | [diff] [blame] | 450 | err = -ENOMEM; |
Tejun Heo | 88e3412 | 2008-08-25 19:30:16 +0900 | [diff] [blame] | 451 | goto out_free; |
Jerome Marchand | 6f2576a | 2008-02-08 11:04:35 +0100 | [diff] [blame] | 452 | } |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 453 | pdev = part_to_dev(p); |
| 454 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | p->start_sect = start; |
Martin K. Petersen | e03a72e | 2010-01-11 03:21:51 -0500 | [diff] [blame] | 456 | p->alignment_offset = |
| 457 | queue_limit_alignment_offset(&disk->queue->limits, start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | p->nr_sects = len; |
Tejun Heo | cf771cb | 2008-09-03 09:01:09 +0200 | [diff] [blame] | 459 | p->partno = partno; |
Tejun Heo | b7db995 | 2008-08-25 19:56:10 +0900 | [diff] [blame] | 460 | p->policy = get_disk_ro(disk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | |
Will Drewry | 6d1d805 | 2010-08-31 15:47:05 -0500 | [diff] [blame] | 462 | if (info) { |
| 463 | struct partition_meta_info *pinfo = alloc_part_info(disk); |
| 464 | if (!pinfo) |
| 465 | goto out_free_stats; |
| 466 | memcpy(pinfo, info, sizeof(*info)); |
| 467 | p->info = pinfo; |
| 468 | } |
| 469 | |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 470 | dname = dev_name(ddev); |
| 471 | if (isdigit(dname[strlen(dname) - 1])) |
Kay Sievers | 3ada8b7 | 2009-01-06 10:44:43 -0800 | [diff] [blame] | 472 | dev_set_name(pdev, "%sp%d", dname, partno); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | else |
Kay Sievers | 3ada8b7 | 2009-01-06 10:44:43 -0800 | [diff] [blame] | 474 | dev_set_name(pdev, "%s%d", dname, partno); |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 475 | |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 476 | device_initialize(pdev); |
| 477 | pdev->class = &block_class; |
| 478 | pdev->type = &part_type; |
| 479 | pdev->parent = ddev; |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 480 | |
Tejun Heo | bcce3de | 2008-08-25 19:47:22 +0900 | [diff] [blame] | 481 | err = blk_alloc_devt(p, &devt); |
| 482 | if (err) |
Will Drewry | 6d1d805 | 2010-08-31 15:47:05 -0500 | [diff] [blame] | 483 | goto out_free_info; |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 484 | pdev->devt = devt; |
Tejun Heo | bcce3de | 2008-08-25 19:47:22 +0900 | [diff] [blame] | 485 | |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 486 | /* delay uevent until 'holders' subdir is created */ |
Ming Lei | f67f129 | 2009-03-01 21:10:49 +0800 | [diff] [blame] | 487 | dev_set_uevent_suppress(pdev, 1); |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 488 | err = device_add(pdev); |
Abdel Benamrouche | d805dda | 2008-07-25 01:48:25 -0700 | [diff] [blame] | 489 | if (err) |
Tejun Heo | 88e3412 | 2008-08-25 19:30:16 +0900 | [diff] [blame] | 490 | goto out_put; |
| 491 | |
| 492 | err = -ENOMEM; |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 493 | p->holder_dir = kobject_create_and_add("holders", &pdev->kobj); |
Tejun Heo | 88e3412 | 2008-08-25 19:30:16 +0900 | [diff] [blame] | 494 | if (!p->holder_dir) |
| 495 | goto out_del; |
| 496 | |
Ming Lei | f67f129 | 2009-03-01 21:10:49 +0800 | [diff] [blame] | 497 | dev_set_uevent_suppress(pdev, 0); |
Abdel Benamrouche | d805dda | 2008-07-25 01:48:25 -0700 | [diff] [blame] | 498 | if (flags & ADDPART_FLAG_WHOLEDISK) { |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 499 | err = device_create_file(pdev, &dev_attr_whole_disk); |
Abdel Benamrouche | d805dda | 2008-07-25 01:48:25 -0700 | [diff] [blame] | 500 | if (err) |
Tejun Heo | 88e3412 | 2008-08-25 19:30:16 +0900 | [diff] [blame] | 501 | goto out_del; |
Abdel Benamrouche | d805dda | 2008-07-25 01:48:25 -0700 | [diff] [blame] | 502 | } |
Jeff Garzik | eee44cc | 2006-10-17 00:10:23 -0700 | [diff] [blame] | 503 | |
Tejun Heo | 88e3412 | 2008-08-25 19:30:16 +0900 | [diff] [blame] | 504 | /* everything is up and running, commence */ |
Tejun Heo | 540eed5 | 2008-08-25 19:56:15 +0900 | [diff] [blame] | 505 | rcu_assign_pointer(ptbl->part[partno], p); |
Tejun Heo | 88e3412 | 2008-08-25 19:30:16 +0900 | [diff] [blame] | 506 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 507 | /* suppress uevent if the disk suppresses it */ |
Heiko Carstens | f8c73c7 | 2009-06-11 15:14:40 +0200 | [diff] [blame] | 508 | if (!dev_get_uevent_suppress(ddev)) |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 509 | kobject_uevent(&pdev->kobj, KOBJ_ADD); |
Abdel Benamrouche | d805dda | 2008-07-25 01:48:25 -0700 | [diff] [blame] | 510 | |
Jens Axboe | 6c23a96 | 2011-01-07 08:43:37 +0100 | [diff] [blame] | 511 | hd_ref_init(p); |
Tejun Heo | ba32929 | 2008-11-10 15:29:58 +0900 | [diff] [blame] | 512 | return p; |
Abdel Benamrouche | d805dda | 2008-07-25 01:48:25 -0700 | [diff] [blame] | 513 | |
Will Drewry | 6d1d805 | 2010-08-31 15:47:05 -0500 | [diff] [blame] | 514 | out_free_info: |
| 515 | free_part_info(p); |
Tejun Heo | eb60fa1 | 2008-11-10 15:28:59 +0900 | [diff] [blame] | 516 | out_free_stats: |
| 517 | free_part_stats(p); |
Tejun Heo | 88e3412 | 2008-08-25 19:30:16 +0900 | [diff] [blame] | 518 | out_free: |
Abdel Benamrouche | d805dda | 2008-07-25 01:48:25 -0700 | [diff] [blame] | 519 | kfree(p); |
Tejun Heo | ba32929 | 2008-11-10 15:29:58 +0900 | [diff] [blame] | 520 | return ERR_PTR(err); |
Tejun Heo | 88e3412 | 2008-08-25 19:30:16 +0900 | [diff] [blame] | 521 | out_del: |
| 522 | kobject_put(p->holder_dir); |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 523 | device_del(pdev); |
Tejun Heo | 88e3412 | 2008-08-25 19:30:16 +0900 | [diff] [blame] | 524 | out_put: |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 525 | put_device(pdev); |
Tejun Heo | bcce3de | 2008-08-25 19:47:22 +0900 | [diff] [blame] | 526 | blk_free_devt(devt); |
Tejun Heo | ba32929 | 2008-11-10 15:29:58 +0900 | [diff] [blame] | 527 | return ERR_PTR(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | } |
| 529 | |
Tejun Heo | b403a98 | 2010-05-15 20:09:31 +0200 | [diff] [blame] | 530 | static bool disk_unlock_native_capacity(struct gendisk *disk) |
| 531 | { |
| 532 | const struct block_device_operations *bdops = disk->fops; |
| 533 | |
| 534 | if (bdops->unlock_native_capacity && |
| 535 | !(disk->flags & GENHD_FL_NATIVE_CAPACITY)) { |
| 536 | printk(KERN_CONT "enabling native capacity\n"); |
| 537 | bdops->unlock_native_capacity(disk); |
| 538 | disk->flags |= GENHD_FL_NATIVE_CAPACITY; |
| 539 | return true; |
| 540 | } else { |
| 541 | printk(KERN_CONT "truncated\n"); |
| 542 | return false; |
| 543 | } |
| 544 | } |
| 545 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | int rescan_partitions(struct gendisk *disk, struct block_device *bdev) |
| 547 | { |
Tejun Heo | b403a98 | 2010-05-15 20:09:31 +0200 | [diff] [blame] | 548 | struct parsed_partitions *state = NULL; |
Tejun Heo | e71bf0d | 2008-09-03 09:03:02 +0200 | [diff] [blame] | 549 | struct disk_part_iter piter; |
| 550 | struct hd_struct *part; |
Tejun Heo | 540eed5 | 2008-08-25 19:56:15 +0900 | [diff] [blame] | 551 | int p, highest, res; |
Tejun Heo | 56bca01 | 2010-05-15 20:09:28 +0200 | [diff] [blame] | 552 | rescan: |
Tejun Heo | b403a98 | 2010-05-15 20:09:31 +0200 | [diff] [blame] | 553 | if (state && !IS_ERR(state)) { |
| 554 | kfree(state); |
| 555 | state = NULL; |
| 556 | } |
| 557 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | if (bdev->bd_part_count) |
| 559 | return -EBUSY; |
| 560 | res = invalidate_partition(disk, 0); |
| 561 | if (res) |
| 562 | return res; |
Tejun Heo | e71bf0d | 2008-09-03 09:03:02 +0200 | [diff] [blame] | 563 | |
| 564 | disk_part_iter_init(&piter, disk, DISK_PITER_INCL_EMPTY); |
| 565 | while ((part = disk_part_iter_next(&piter))) |
| 566 | delete_partition(disk, part->partno); |
| 567 | disk_part_iter_exit(&piter); |
| 568 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | if (disk->fops->revalidate_disk) |
| 570 | disk->fops->revalidate_disk(disk); |
Andrew Patterson | 9bc3ffb | 2008-09-04 14:27:30 -0600 | [diff] [blame] | 571 | check_disk_size_change(disk, bdev); |
| 572 | bdev->bd_invalidated = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | if (!get_capacity(disk) || !(state = check_partition(disk, bdev))) |
| 574 | return 0; |
Tejun Heo | b403a98 | 2010-05-15 20:09:31 +0200 | [diff] [blame] | 575 | if (IS_ERR(state)) { |
| 576 | /* |
| 577 | * I/O error reading the partition table. If any |
| 578 | * partition code tried to read beyond EOD, retry |
| 579 | * after unlocking native capacity. |
| 580 | */ |
| 581 | if (PTR_ERR(state) == -ENOSPC) { |
| 582 | printk(KERN_WARNING "%s: partition table beyond EOD, ", |
| 583 | disk->disk_name); |
| 584 | if (disk_unlock_native_capacity(disk)) |
| 585 | goto rescan; |
| 586 | } |
suzuki | b74a2f0 | 2007-03-16 13:38:25 -0800 | [diff] [blame] | 587 | return -EIO; |
Tejun Heo | b403a98 | 2010-05-15 20:09:31 +0200 | [diff] [blame] | 588 | } |
| 589 | /* |
| 590 | * If any partition code tried to read beyond EOD, try |
| 591 | * unlocking native capacity even if partition table is |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 592 | * successfully read as we could be missing some partitions. |
Tejun Heo | b403a98 | 2010-05-15 20:09:31 +0200 | [diff] [blame] | 593 | */ |
| 594 | if (state->access_beyond_eod) { |
| 595 | printk(KERN_WARNING |
| 596 | "%s: partition table partially beyond EOD, ", |
| 597 | disk->disk_name); |
| 598 | if (disk_unlock_native_capacity(disk)) |
| 599 | goto rescan; |
| 600 | } |
Kay Sievers | 6bcf19d | 2008-03-09 21:26:02 +0100 | [diff] [blame] | 601 | |
| 602 | /* tell userspace that the media / partition table may have changed */ |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 603 | kobject_uevent(&disk_to_dev(disk)->kobj, KOBJ_CHANGE); |
Kay Sievers | 6bcf19d | 2008-03-09 21:26:02 +0100 | [diff] [blame] | 604 | |
Tejun Heo | 540eed5 | 2008-08-25 19:56:15 +0900 | [diff] [blame] | 605 | /* Detect the highest partition number and preallocate |
| 606 | * disk->part_tbl. This is an optimization and not strictly |
| 607 | * necessary. |
| 608 | */ |
| 609 | for (p = 1, highest = 0; p < state->limit; p++) |
| 610 | if (state->parts[p].size) |
| 611 | highest = p; |
| 612 | |
| 613 | disk_expand_part_tbl(disk, highest); |
| 614 | |
| 615 | /* add partitions */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | for (p = 1; p < state->limit; p++) { |
Bartlomiej Zolnierkiewicz | db429e9 | 2009-06-07 13:52:52 +0200 | [diff] [blame] | 617 | sector_t size, from; |
Will Drewry | 6d1d805 | 2010-08-31 15:47:05 -0500 | [diff] [blame] | 618 | struct partition_meta_info *info = NULL; |
Tejun Heo | 56bca01 | 2010-05-15 20:09:28 +0200 | [diff] [blame] | 619 | |
Bartlomiej Zolnierkiewicz | db429e9 | 2009-06-07 13:52:52 +0200 | [diff] [blame] | 620 | size = state->parts[p].size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | if (!size) |
| 622 | continue; |
Bartlomiej Zolnierkiewicz | db429e9 | 2009-06-07 13:52:52 +0200 | [diff] [blame] | 623 | |
| 624 | from = state->parts[p].from; |
Kay Sievers | ac0d86f | 2008-10-15 22:04:21 -0700 | [diff] [blame] | 625 | if (from >= get_capacity(disk)) { |
Andrew Morton | 8d99f83 | 2008-09-13 02:33:25 -0700 | [diff] [blame] | 626 | printk(KERN_WARNING |
Tejun Heo | b403a98 | 2010-05-15 20:09:31 +0200 | [diff] [blame] | 627 | "%s: p%d start %llu is beyond EOD, ", |
Kay Sievers | ac0d86f | 2008-10-15 22:04:21 -0700 | [diff] [blame] | 628 | disk->disk_name, p, (unsigned long long) from); |
Tejun Heo | b403a98 | 2010-05-15 20:09:31 +0200 | [diff] [blame] | 629 | if (disk_unlock_native_capacity(disk)) |
| 630 | goto rescan; |
Kay Sievers | ac0d86f | 2008-10-15 22:04:21 -0700 | [diff] [blame] | 631 | continue; |
| 632 | } |
Bartlomiej Zolnierkiewicz | db429e9 | 2009-06-07 13:52:52 +0200 | [diff] [blame] | 633 | |
Kay Sievers | ac0d86f | 2008-10-15 22:04:21 -0700 | [diff] [blame] | 634 | if (from + size > get_capacity(disk)) { |
Kay Sievers | ac0d86f | 2008-10-15 22:04:21 -0700 | [diff] [blame] | 635 | printk(KERN_WARNING |
Tejun Heo | b403a98 | 2010-05-15 20:09:31 +0200 | [diff] [blame] | 636 | "%s: p%d size %llu extends beyond EOD, ", |
Kay Sievers | ac0d86f | 2008-10-15 22:04:21 -0700 | [diff] [blame] | 637 | disk->disk_name, p, (unsigned long long) size); |
Bartlomiej Zolnierkiewicz | db429e9 | 2009-06-07 13:52:52 +0200 | [diff] [blame] | 638 | |
Tejun Heo | b403a98 | 2010-05-15 20:09:31 +0200 | [diff] [blame] | 639 | if (disk_unlock_native_capacity(disk)) { |
Tejun Heo | 56bca01 | 2010-05-15 20:09:28 +0200 | [diff] [blame] | 640 | /* free state and restart */ |
Tejun Heo | 56bca01 | 2010-05-15 20:09:28 +0200 | [diff] [blame] | 641 | goto rescan; |
Bartlomiej Zolnierkiewicz | db429e9 | 2009-06-07 13:52:52 +0200 | [diff] [blame] | 642 | } else { |
| 643 | /* |
| 644 | * we can not ignore partitions of broken tables |
| 645 | * created by for example camera firmware, but |
| 646 | * we limit them to the end of the disk to avoid |
| 647 | * creating invalid block devices |
| 648 | */ |
Bartlomiej Zolnierkiewicz | db429e9 | 2009-06-07 13:52:52 +0200 | [diff] [blame] | 649 | size = get_capacity(disk) - from; |
| 650 | } |
Mike Miller | 98bd34e | 2006-06-23 02:06:07 -0700 | [diff] [blame] | 651 | } |
Will Drewry | 6d1d805 | 2010-08-31 15:47:05 -0500 | [diff] [blame] | 652 | |
| 653 | if (state->parts[p].has_info) |
| 654 | info = &state->parts[p].info; |
Tejun Heo | ba32929 | 2008-11-10 15:29:58 +0900 | [diff] [blame] | 655 | part = add_partition(disk, p, from, size, |
Will Drewry | 6d1d805 | 2010-08-31 15:47:05 -0500 | [diff] [blame] | 656 | state->parts[p].flags, |
| 657 | &state->parts[p].info); |
Tejun Heo | ba32929 | 2008-11-10 15:29:58 +0900 | [diff] [blame] | 658 | if (IS_ERR(part)) { |
| 659 | printk(KERN_ERR " %s: p%d could not be added: %ld\n", |
| 660 | disk->disk_name, p, -PTR_ERR(part)); |
Abdel Benamrouche | 04ebd4a | 2008-07-25 01:48:26 -0700 | [diff] [blame] | 661 | continue; |
| 662 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | #ifdef CONFIG_BLK_DEV_MD |
Fabio Massimo Di Nitto | d18d768 | 2007-02-10 23:50:00 -0800 | [diff] [blame] | 664 | if (state->parts[p].flags & ADDPART_FLAG_RAID) |
Tejun Heo | 55e8e30 | 2008-11-10 15:30:47 +0900 | [diff] [blame] | 665 | md_autodetect_dev(part_to_dev(part)->devt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | #endif |
| 667 | } |
| 668 | kfree(state); |
| 669 | return 0; |
| 670 | } |
| 671 | |
| 672 | unsigned char *read_dev_sector(struct block_device *bdev, sector_t n, Sector *p) |
| 673 | { |
| 674 | struct address_space *mapping = bdev->bd_inode->i_mapping; |
| 675 | struct page *page; |
| 676 | |
Pekka Enberg | 090d2b1 | 2006-06-23 02:05:08 -0700 | [diff] [blame] | 677 | page = read_mapping_page(mapping, (pgoff_t)(n >> (PAGE_CACHE_SHIFT-9)), |
| 678 | NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | if (!IS_ERR(page)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | if (PageError(page)) |
| 681 | goto fail; |
| 682 | p->v = page; |
| 683 | return (unsigned char *)page_address(page) + ((n & ((1 << (PAGE_CACHE_SHIFT - 9)) - 1)) << 9); |
| 684 | fail: |
| 685 | page_cache_release(page); |
| 686 | } |
| 687 | p->v = NULL; |
| 688 | return NULL; |
| 689 | } |
| 690 | |
| 691 | EXPORT_SYMBOL(read_dev_sector); |