Boaz Harrosh | b14f8ab | 2008-10-27 18:27:55 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2005, 2006 |
Boaz Harrosh | 27d2e14 | 2009-06-14 17:23:09 +0300 | [diff] [blame] | 3 | * Avishay Traeger (avishay@gmail.com) |
Boaz Harrosh | b14f8ab | 2008-10-27 18:27:55 +0200 | [diff] [blame] | 4 | * Copyright (C) 2008, 2009 |
| 5 | * Boaz Harrosh <bharrosh@panasas.com> |
| 6 | * |
| 7 | * This file is part of exofs. |
| 8 | * |
| 9 | * exofs is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation. Since it is based on ext2, and the only |
| 12 | * valid version of GPL for the Linux kernel is version 2, the only valid |
| 13 | * version of GPL for exofs is version 2. |
| 14 | * |
| 15 | * exofs is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * GNU General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with exofs; if not, write to the Free Software |
| 22 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 23 | */ |
| 24 | |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 25 | #include <linux/slab.h> |
Paul Gortmaker | 143cb49 | 2011-07-01 14:23:34 -0400 | [diff] [blame] | 26 | #include <linux/module.h> |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 27 | #include <asm/div64.h> |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 28 | #include <linux/lcm.h> |
Boaz Harrosh | b14f8ab | 2008-10-27 18:27:55 +0200 | [diff] [blame] | 29 | |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 30 | #include "ore_raid.h" |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 31 | |
Boaz Harrosh | cf283ad | 2011-08-06 19:22:06 -0700 | [diff] [blame] | 32 | MODULE_AUTHOR("Boaz Harrosh <bharrosh@panasas.com>"); |
| 33 | MODULE_DESCRIPTION("Objects Raid Engine ore.ko"); |
| 34 | MODULE_LICENSE("GPL"); |
| 35 | |
Boaz Harrosh | 5a51c0c | 2011-09-28 13:18:45 +0300 | [diff] [blame] | 36 | /* ore_verify_layout does a couple of things: |
| 37 | * 1. Given a minimum number of needed parameters fixes up the rest of the |
| 38 | * members to be operatonals for the ore. The needed parameters are those |
| 39 | * that are defined by the pnfs-objects layout STD. |
| 40 | * 2. Check to see if the current ore code actually supports these parameters |
| 41 | * for example stripe_unit must be a multple of the system PAGE_SIZE, |
| 42 | * and etc... |
| 43 | * 3. Cache some havily used calculations that will be needed by users. |
| 44 | */ |
| 45 | |
Boaz Harrosh | 5a51c0c | 2011-09-28 13:18:45 +0300 | [diff] [blame] | 46 | enum { BIO_MAX_PAGES_KMALLOC = |
| 47 | (PAGE_SIZE - sizeof(struct bio)) / sizeof(struct bio_vec),}; |
| 48 | |
| 49 | int ore_verify_layout(unsigned total_comps, struct ore_layout *layout) |
| 50 | { |
| 51 | u64 stripe_length; |
| 52 | |
Boaz Harrosh | 44231e6 | 2010-11-21 20:03:24 +0200 | [diff] [blame] | 53 | switch (layout->raid_algorithm) { |
| 54 | case PNFS_OSD_RAID_0: |
| 55 | layout->parity = 0; |
| 56 | break; |
| 57 | case PNFS_OSD_RAID_5: |
| 58 | layout->parity = 1; |
| 59 | break; |
| 60 | case PNFS_OSD_RAID_PQ: |
| 61 | case PNFS_OSD_RAID_4: |
| 62 | default: |
| 63 | ORE_ERR("Only RAID_0/5 for now\n"); |
Boaz Harrosh | 5a51c0c | 2011-09-28 13:18:45 +0300 | [diff] [blame] | 64 | return -EINVAL; |
| 65 | } |
| 66 | if (0 != (layout->stripe_unit & ~PAGE_MASK)) { |
| 67 | ORE_ERR("Stripe Unit(0x%llx)" |
| 68 | " must be Multples of PAGE_SIZE(0x%lx)\n", |
| 69 | _LLU(layout->stripe_unit), PAGE_SIZE); |
| 70 | return -EINVAL; |
| 71 | } |
| 72 | if (layout->group_width) { |
| 73 | if (!layout->group_depth) { |
| 74 | ORE_ERR("group_depth == 0 && group_width != 0\n"); |
| 75 | return -EINVAL; |
| 76 | } |
| 77 | if (total_comps < (layout->group_width * layout->mirrors_p1)) { |
| 78 | ORE_ERR("Data Map wrong, " |
| 79 | "numdevs=%d < group_width=%d * mirrors=%d\n", |
| 80 | total_comps, layout->group_width, |
| 81 | layout->mirrors_p1); |
| 82 | return -EINVAL; |
| 83 | } |
| 84 | layout->group_count = total_comps / layout->mirrors_p1 / |
| 85 | layout->group_width; |
| 86 | } else { |
| 87 | if (layout->group_depth) { |
| 88 | printk(KERN_NOTICE "Warning: group_depth ignored " |
| 89 | "group_width == 0 && group_depth == %lld\n", |
| 90 | _LLU(layout->group_depth)); |
| 91 | } |
| 92 | layout->group_width = total_comps / layout->mirrors_p1; |
| 93 | layout->group_depth = -1; |
| 94 | layout->group_count = 1; |
| 95 | } |
| 96 | |
| 97 | stripe_length = (u64)layout->group_width * layout->stripe_unit; |
| 98 | if (stripe_length >= (1ULL << 32)) { |
| 99 | ORE_ERR("Stripe_length(0x%llx) >= 32bit is not supported\n", |
| 100 | _LLU(stripe_length)); |
| 101 | return -EINVAL; |
| 102 | } |
| 103 | |
| 104 | layout->max_io_length = |
| 105 | (BIO_MAX_PAGES_KMALLOC * PAGE_SIZE - layout->stripe_unit) * |
| 106 | layout->group_width; |
Boaz Harrosh | 769ba8d | 2011-10-14 15:33:51 +0200 | [diff] [blame] | 107 | if (layout->parity) { |
| 108 | unsigned stripe_length = |
| 109 | (layout->group_width - layout->parity) * |
| 110 | layout->stripe_unit; |
| 111 | |
| 112 | layout->max_io_length /= stripe_length; |
| 113 | layout->max_io_length *= stripe_length; |
| 114 | } |
Boaz Harrosh | 5a51c0c | 2011-09-28 13:18:45 +0300 | [diff] [blame] | 115 | return 0; |
| 116 | } |
| 117 | EXPORT_SYMBOL(ore_verify_layout); |
| 118 | |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 119 | static u8 *_ios_cred(struct ore_io_state *ios, unsigned index) |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 120 | { |
Boaz Harrosh | 5bf696d | 2011-09-28 11:39:59 +0300 | [diff] [blame] | 121 | return ios->oc->comps[index & ios->oc->single_comp].cred; |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 122 | } |
| 123 | |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 124 | static struct osd_obj_id *_ios_obj(struct ore_io_state *ios, unsigned index) |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 125 | { |
Boaz Harrosh | 5bf696d | 2011-09-28 11:39:59 +0300 | [diff] [blame] | 126 | return &ios->oc->comps[index & ios->oc->single_comp].obj; |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 127 | } |
| 128 | |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 129 | static struct osd_dev *_ios_od(struct ore_io_state *ios, unsigned index) |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 130 | { |
Boaz Harrosh | 3bd9856 | 2011-09-28 12:04:23 +0300 | [diff] [blame] | 131 | ORE_DBGMSG2("oc->first_dev=%d oc->numdevs=%d i=%d oc->ods=%p\n", |
| 132 | ios->oc->first_dev, ios->oc->numdevs, index, |
| 133 | ios->oc->ods); |
| 134 | |
Boaz Harrosh | d866d87 | 2011-09-28 14:43:09 +0300 | [diff] [blame] | 135 | return ore_comp_dev(ios->oc, index); |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 136 | } |
| 137 | |
Boaz Harrosh | 769ba8d | 2011-10-14 15:33:51 +0200 | [diff] [blame] | 138 | int _ore_get_io_state(struct ore_layout *layout, |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 139 | struct ore_components *oc, unsigned numdevs, |
| 140 | unsigned sgs_per_dev, unsigned num_par_pages, |
| 141 | struct ore_io_state **pios) |
Boaz Harrosh | b14f8ab | 2008-10-27 18:27:55 +0200 | [diff] [blame] | 142 | { |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 143 | struct ore_io_state *ios; |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 144 | struct page **pages; |
| 145 | struct osd_sg_entry *sgilist; |
| 146 | struct __alloc_all_io_state { |
| 147 | struct ore_io_state ios; |
| 148 | struct ore_per_dev_state per_dev[numdevs]; |
| 149 | union { |
| 150 | struct osd_sg_entry sglist[sgs_per_dev * numdevs]; |
| 151 | struct page *pages[num_par_pages]; |
| 152 | }; |
| 153 | } *_aios; |
Boaz Harrosh | b14f8ab | 2008-10-27 18:27:55 +0200 | [diff] [blame] | 154 | |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 155 | if (likely(sizeof(*_aios) <= PAGE_SIZE)) { |
| 156 | _aios = kzalloc(sizeof(*_aios), GFP_KERNEL); |
| 157 | if (unlikely(!_aios)) { |
| 158 | ORE_DBGMSG("Failed kzalloc bytes=%zd\n", |
| 159 | sizeof(*_aios)); |
| 160 | *pios = NULL; |
| 161 | return -ENOMEM; |
| 162 | } |
| 163 | pages = num_par_pages ? _aios->pages : NULL; |
| 164 | sgilist = sgs_per_dev ? _aios->sglist : NULL; |
| 165 | ios = &_aios->ios; |
| 166 | } else { |
| 167 | struct __alloc_small_io_state { |
| 168 | struct ore_io_state ios; |
| 169 | struct ore_per_dev_state per_dev[numdevs]; |
| 170 | } *_aio_small; |
| 171 | union __extra_part { |
| 172 | struct osd_sg_entry sglist[sgs_per_dev * numdevs]; |
| 173 | struct page *pages[num_par_pages]; |
| 174 | } *extra_part; |
| 175 | |
| 176 | _aio_small = kzalloc(sizeof(*_aio_small), GFP_KERNEL); |
| 177 | if (unlikely(!_aio_small)) { |
| 178 | ORE_DBGMSG("Failed alloc first part bytes=%zd\n", |
| 179 | sizeof(*_aio_small)); |
| 180 | *pios = NULL; |
| 181 | return -ENOMEM; |
| 182 | } |
| 183 | extra_part = kzalloc(sizeof(*extra_part), GFP_KERNEL); |
| 184 | if (unlikely(!extra_part)) { |
| 185 | ORE_DBGMSG("Failed alloc second part bytes=%zd\n", |
| 186 | sizeof(*extra_part)); |
| 187 | kfree(_aio_small); |
| 188 | *pios = NULL; |
| 189 | return -ENOMEM; |
| 190 | } |
| 191 | |
| 192 | pages = num_par_pages ? extra_part->pages : NULL; |
| 193 | sgilist = sgs_per_dev ? extra_part->sglist : NULL; |
| 194 | /* In this case the per_dev[0].sgilist holds the pointer to |
| 195 | * be freed |
| 196 | */ |
| 197 | ios = &_aio_small->ios; |
| 198 | ios->extra_part_alloc = true; |
| 199 | } |
| 200 | |
| 201 | if (pages) { |
| 202 | ios->parity_pages = pages; |
| 203 | ios->max_par_pages = num_par_pages; |
| 204 | } |
| 205 | if (sgilist) { |
| 206 | unsigned d; |
| 207 | |
| 208 | for (d = 0; d < numdevs; ++d) { |
| 209 | ios->per_dev[d].sglist = sgilist; |
| 210 | sgilist += sgs_per_dev; |
| 211 | } |
| 212 | ios->sgs_per_dev = sgs_per_dev; |
Boaz Harrosh | b14f8ab | 2008-10-27 18:27:55 +0200 | [diff] [blame] | 213 | } |
| 214 | |
Boaz Harrosh | 45d3abc | 2010-01-28 11:46:16 +0200 | [diff] [blame] | 215 | ios->layout = layout; |
Boaz Harrosh | 5bf696d | 2011-09-28 11:39:59 +0300 | [diff] [blame] | 216 | ios->oc = oc; |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 217 | *pios = ios; |
| 218 | return 0; |
| 219 | } |
Boaz Harrosh | b916c5c | 2011-09-28 11:55:51 +0300 | [diff] [blame] | 220 | |
| 221 | /* Allocate an io_state for only a single group of devices |
| 222 | * |
| 223 | * If a user needs to call ore_read/write() this version must be used becase it |
| 224 | * allocates extra stuff for striping and raid. |
| 225 | * The ore might decide to only IO less then @length bytes do to alignmets |
| 226 | * and constrains as follows: |
| 227 | * - The IO cannot cross group boundary. |
| 228 | * - In raid5/6 The end of the IO must align at end of a stripe eg. |
| 229 | * (@offset + @length) % strip_size == 0. Or the complete range is within a |
| 230 | * single stripe. |
| 231 | * - Memory condition only permitted a shorter IO. (A user can use @length=~0 |
| 232 | * And check the returned ios->length for max_io_size.) |
| 233 | * |
| 234 | * The caller must check returned ios->length (and/or ios->nr_pages) and |
| 235 | * re-issue these pages that fall outside of ios->length |
| 236 | */ |
| 237 | int ore_get_rw_state(struct ore_layout *layout, struct ore_components *oc, |
| 238 | bool is_reading, u64 offset, u64 length, |
| 239 | struct ore_io_state **pios) |
| 240 | { |
| 241 | struct ore_io_state *ios; |
| 242 | unsigned numdevs = layout->group_width * layout->mirrors_p1; |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 243 | unsigned sgs_per_dev = 0, max_par_pages = 0; |
Boaz Harrosh | b916c5c | 2011-09-28 11:55:51 +0300 | [diff] [blame] | 244 | int ret; |
| 245 | |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 246 | if (layout->parity && length) { |
| 247 | unsigned data_devs = layout->group_width - layout->parity; |
| 248 | unsigned stripe_size = layout->stripe_unit * data_devs; |
| 249 | unsigned pages_in_unit = layout->stripe_unit / PAGE_SIZE; |
| 250 | u32 remainder; |
| 251 | u64 num_stripes; |
| 252 | u64 num_raid_units; |
| 253 | |
| 254 | num_stripes = div_u64_rem(length, stripe_size, &remainder); |
| 255 | if (remainder) |
| 256 | ++num_stripes; |
| 257 | |
| 258 | num_raid_units = num_stripes * layout->parity; |
| 259 | |
| 260 | if (is_reading) { |
| 261 | /* For reads add per_dev sglist array */ |
| 262 | /* TODO: Raid 6 we need twice more. Actually: |
| 263 | * num_stripes / LCMdP(W,P); |
| 264 | * if (W%P != 0) num_stripes *= parity; |
| 265 | */ |
| 266 | |
| 267 | /* first/last seg is split */ |
| 268 | num_raid_units += layout->group_width; |
| 269 | sgs_per_dev = div_u64(num_raid_units, data_devs); |
| 270 | } else { |
| 271 | /* For Writes add parity pages array. */ |
| 272 | max_par_pages = num_raid_units * pages_in_unit * |
| 273 | sizeof(struct page *); |
| 274 | } |
| 275 | } |
| 276 | |
| 277 | ret = _ore_get_io_state(layout, oc, numdevs, sgs_per_dev, max_par_pages, |
| 278 | pios); |
Boaz Harrosh | b916c5c | 2011-09-28 11:55:51 +0300 | [diff] [blame] | 279 | if (unlikely(ret)) |
| 280 | return ret; |
| 281 | |
| 282 | ios = *pios; |
| 283 | ios->reading = is_reading; |
| 284 | ios->offset = offset; |
| 285 | |
| 286 | if (length) { |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 287 | ore_calc_stripe_info(layout, offset, length, &ios->si); |
| 288 | ios->length = ios->si.length; |
Boaz Harrosh | b916c5c | 2011-09-28 11:55:51 +0300 | [diff] [blame] | 289 | ios->nr_pages = (ios->length + PAGE_SIZE - 1) / PAGE_SIZE; |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 290 | if (layout->parity) |
| 291 | _ore_post_alloc_raid_stuff(ios); |
Boaz Harrosh | b916c5c | 2011-09-28 11:55:51 +0300 | [diff] [blame] | 292 | } |
| 293 | |
| 294 | return 0; |
| 295 | } |
Boaz Harrosh | cf283ad | 2011-08-06 19:22:06 -0700 | [diff] [blame] | 296 | EXPORT_SYMBOL(ore_get_rw_state); |
Boaz Harrosh | b14f8ab | 2008-10-27 18:27:55 +0200 | [diff] [blame] | 297 | |
Boaz Harrosh | b916c5c | 2011-09-28 11:55:51 +0300 | [diff] [blame] | 298 | /* Allocate an io_state for all the devices in the comps array |
| 299 | * |
| 300 | * This version of io_state allocation is used mostly by create/remove |
| 301 | * and trunc where we currently need all the devices. The only wastful |
| 302 | * bit is the read/write_attributes with no IO. Those sites should |
| 303 | * be converted to use ore_get_rw_state() with length=0 |
| 304 | */ |
Boaz Harrosh | 5bf696d | 2011-09-28 11:39:59 +0300 | [diff] [blame] | 305 | int ore_get_io_state(struct ore_layout *layout, struct ore_components *oc, |
Boaz Harrosh | b916c5c | 2011-09-28 11:55:51 +0300 | [diff] [blame] | 306 | struct ore_io_state **pios) |
Boaz Harrosh | e1042ba | 2010-11-16 20:09:58 +0200 | [diff] [blame] | 307 | { |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 308 | return _ore_get_io_state(layout, oc, oc->numdevs, 0, 0, pios); |
Boaz Harrosh | e1042ba | 2010-11-16 20:09:58 +0200 | [diff] [blame] | 309 | } |
Boaz Harrosh | cf283ad | 2011-08-06 19:22:06 -0700 | [diff] [blame] | 310 | EXPORT_SYMBOL(ore_get_io_state); |
Boaz Harrosh | e1042ba | 2010-11-16 20:09:58 +0200 | [diff] [blame] | 311 | |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 312 | void ore_put_io_state(struct ore_io_state *ios) |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 313 | { |
| 314 | if (ios) { |
| 315 | unsigned i; |
| 316 | |
| 317 | for (i = 0; i < ios->numdevs; i++) { |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 318 | struct ore_per_dev_state *per_dev = &ios->per_dev[i]; |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 319 | |
| 320 | if (per_dev->or) |
| 321 | osd_end_request(per_dev->or); |
| 322 | if (per_dev->bio) |
| 323 | bio_put(per_dev->bio); |
| 324 | } |
| 325 | |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 326 | _ore_free_raid_stuff(ios); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 327 | kfree(ios); |
| 328 | } |
| 329 | } |
Boaz Harrosh | cf283ad | 2011-08-06 19:22:06 -0700 | [diff] [blame] | 330 | EXPORT_SYMBOL(ore_put_io_state); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 331 | |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 332 | static void _sync_done(struct ore_io_state *ios, void *p) |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 333 | { |
| 334 | struct completion *waiting = p; |
| 335 | |
| 336 | complete(waiting); |
| 337 | } |
| 338 | |
| 339 | static void _last_io(struct kref *kref) |
| 340 | { |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 341 | struct ore_io_state *ios = container_of( |
| 342 | kref, struct ore_io_state, kref); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 343 | |
| 344 | ios->done(ios, ios->private); |
| 345 | } |
| 346 | |
| 347 | static void _done_io(struct osd_request *or, void *p) |
| 348 | { |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 349 | struct ore_io_state *ios = p; |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 350 | |
| 351 | kref_put(&ios->kref, _last_io); |
| 352 | } |
| 353 | |
Boaz Harrosh | 769ba8d | 2011-10-14 15:33:51 +0200 | [diff] [blame] | 354 | int ore_io_execute(struct ore_io_state *ios) |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 355 | { |
| 356 | DECLARE_COMPLETION_ONSTACK(wait); |
| 357 | bool sync = (ios->done == NULL); |
| 358 | int i, ret; |
| 359 | |
| 360 | if (sync) { |
| 361 | ios->done = _sync_done; |
| 362 | ios->private = &wait; |
| 363 | } |
| 364 | |
| 365 | for (i = 0; i < ios->numdevs; i++) { |
| 366 | struct osd_request *or = ios->per_dev[i].or; |
| 367 | if (unlikely(!or)) |
| 368 | continue; |
| 369 | |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 370 | ret = osd_finalize_request(or, 0, _ios_cred(ios, i), NULL); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 371 | if (unlikely(ret)) { |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 372 | ORE_DBGMSG("Failed to osd_finalize_request() => %d\n", |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 373 | ret); |
| 374 | return ret; |
| 375 | } |
| 376 | } |
| 377 | |
| 378 | kref_init(&ios->kref); |
| 379 | |
| 380 | for (i = 0; i < ios->numdevs; i++) { |
| 381 | struct osd_request *or = ios->per_dev[i].or; |
| 382 | if (unlikely(!or)) |
| 383 | continue; |
| 384 | |
| 385 | kref_get(&ios->kref); |
| 386 | osd_execute_request_async(or, _done_io, ios); |
| 387 | } |
| 388 | |
| 389 | kref_put(&ios->kref, _last_io); |
| 390 | ret = 0; |
| 391 | |
| 392 | if (sync) { |
| 393 | wait_for_completion(&wait); |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 394 | ret = ore_check_io(ios, NULL); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 395 | } |
Boaz Harrosh | b14f8ab | 2008-10-27 18:27:55 +0200 | [diff] [blame] | 396 | return ret; |
| 397 | } |
| 398 | |
Boaz Harrosh | 22ddc55 | 2010-01-19 19:24:45 +0200 | [diff] [blame] | 399 | static void _clear_bio(struct bio *bio) |
| 400 | { |
| 401 | struct bio_vec *bv; |
| 402 | unsigned i; |
| 403 | |
| 404 | __bio_for_each_segment(bv, bio, i, 0) { |
| 405 | unsigned this_count = bv->bv_len; |
| 406 | |
| 407 | if (likely(PAGE_SIZE == this_count)) |
| 408 | clear_highpage(bv->bv_page); |
| 409 | else |
| 410 | zero_user(bv->bv_page, bv->bv_offset, this_count); |
| 411 | } |
| 412 | } |
| 413 | |
Boaz Harrosh | 4b46c9f | 2011-09-28 13:25:50 +0300 | [diff] [blame] | 414 | int ore_check_io(struct ore_io_state *ios, ore_on_dev_error on_dev_error) |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 415 | { |
| 416 | enum osd_err_priority acumulated_osd_err = 0; |
| 417 | int acumulated_lin_err = 0; |
| 418 | int i; |
| 419 | |
| 420 | for (i = 0; i < ios->numdevs; i++) { |
| 421 | struct osd_sense_info osi; |
Boaz Harrosh | 4b46c9f | 2011-09-28 13:25:50 +0300 | [diff] [blame] | 422 | struct ore_per_dev_state *per_dev = &ios->per_dev[i]; |
| 423 | struct osd_request *or = per_dev->or; |
Boaz Harrosh | 22ddc55 | 2010-01-19 19:24:45 +0200 | [diff] [blame] | 424 | int ret; |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 425 | |
Boaz Harrosh | 22ddc55 | 2010-01-19 19:24:45 +0200 | [diff] [blame] | 426 | if (unlikely(!or)) |
| 427 | continue; |
| 428 | |
| 429 | ret = osd_req_decode_sense(or, &osi); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 430 | if (likely(!ret)) |
| 431 | continue; |
| 432 | |
Boaz Harrosh | 22ddc55 | 2010-01-19 19:24:45 +0200 | [diff] [blame] | 433 | if (OSD_ERR_PRI_CLEAR_PAGES == osi.osd_err_pri) { |
| 434 | /* start read offset passed endof file */ |
Boaz Harrosh | 4b46c9f | 2011-09-28 13:25:50 +0300 | [diff] [blame] | 435 | _clear_bio(per_dev->bio); |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 436 | ORE_DBGMSG("start read offset passed end of file " |
Boaz Harrosh | 22ddc55 | 2010-01-19 19:24:45 +0200 | [diff] [blame] | 437 | "offset=0x%llx, length=0x%llx\n", |
Boaz Harrosh | 4b46c9f | 2011-09-28 13:25:50 +0300 | [diff] [blame] | 438 | _LLU(per_dev->offset), |
| 439 | _LLU(per_dev->length)); |
Boaz Harrosh | 22ddc55 | 2010-01-19 19:24:45 +0200 | [diff] [blame] | 440 | |
| 441 | continue; /* we recovered */ |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 442 | } |
| 443 | |
Boaz Harrosh | 4b46c9f | 2011-09-28 13:25:50 +0300 | [diff] [blame] | 444 | if (on_dev_error) { |
| 445 | u64 residual = ios->reading ? |
| 446 | or->in.residual : or->out.residual; |
| 447 | u64 offset = (ios->offset + ios->length) - residual; |
Boaz Harrosh | ffefb8ea | 2011-12-27 19:23:36 +0200 | [diff] [blame^] | 448 | unsigned dev = per_dev->dev - ios->oc->first_dev; |
| 449 | struct ore_dev *od = ios->oc->ods[dev]; |
Boaz Harrosh | 4b46c9f | 2011-09-28 13:25:50 +0300 | [diff] [blame] | 450 | |
Boaz Harrosh | ffefb8ea | 2011-12-27 19:23:36 +0200 | [diff] [blame^] | 451 | on_dev_error(ios, od, dev, osi.osd_err_pri, |
Boaz Harrosh | 4b46c9f | 2011-09-28 13:25:50 +0300 | [diff] [blame] | 452 | offset, residual); |
| 453 | } |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 454 | if (osi.osd_err_pri >= acumulated_osd_err) { |
| 455 | acumulated_osd_err = osi.osd_err_pri; |
| 456 | acumulated_lin_err = ret; |
| 457 | } |
| 458 | } |
| 459 | |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 460 | return acumulated_lin_err; |
| 461 | } |
Boaz Harrosh | cf283ad | 2011-08-06 19:22:06 -0700 | [diff] [blame] | 462 | EXPORT_SYMBOL(ore_check_io); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 463 | |
Boaz Harrosh | b367e78 | 2010-02-07 19:18:58 +0200 | [diff] [blame] | 464 | /* |
| 465 | * L - logical offset into the file |
| 466 | * |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 467 | * D - number of Data devices |
| 468 | * D = group_width - parity |
Boaz Harrosh | b367e78 | 2010-02-07 19:18:58 +0200 | [diff] [blame] | 469 | * |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 470 | * U - The number of bytes in a stripe within a group |
| 471 | * U = stripe_unit * D |
Boaz Harrosh | b367e78 | 2010-02-07 19:18:58 +0200 | [diff] [blame] | 472 | * |
Boaz Harrosh | 50a76fd | 2010-02-11 13:01:39 +0200 | [diff] [blame] | 473 | * T - The number of bytes striped within a group of component objects |
| 474 | * (before advancing to the next group) |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 475 | * T = U * group_depth |
Boaz Harrosh | 50a76fd | 2010-02-11 13:01:39 +0200 | [diff] [blame] | 476 | * |
| 477 | * S - The number of bytes striped across all component objects |
| 478 | * before the pattern repeats |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 479 | * S = T * group_count |
Boaz Harrosh | 50a76fd | 2010-02-11 13:01:39 +0200 | [diff] [blame] | 480 | * |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 481 | * M - The "major" (i.e., across all components) cycle number |
Boaz Harrosh | 50a76fd | 2010-02-11 13:01:39 +0200 | [diff] [blame] | 482 | * M = L / S |
| 483 | * |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 484 | * G - Counts the groups from the beginning of the major cycle |
Boaz Harrosh | 50a76fd | 2010-02-11 13:01:39 +0200 | [diff] [blame] | 485 | * G = (L - (M * S)) / T [or (L % S) / T] |
| 486 | * |
| 487 | * H - The byte offset within the group |
Boaz Harrosh | 50a76fd | 2010-02-11 13:01:39 +0200 | [diff] [blame] | 488 | * H = (L - (M * S)) % T [or (L % S) % T] |
| 489 | * |
| 490 | * N - The "minor" (i.e., across the group) stripe number |
Boaz Harrosh | 50a76fd | 2010-02-11 13:01:39 +0200 | [diff] [blame] | 491 | * N = H / U |
Boaz Harrosh | b367e78 | 2010-02-07 19:18:58 +0200 | [diff] [blame] | 492 | * |
| 493 | * C - The component index coresponding to L |
| 494 | * |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 495 | * C = (H - (N * U)) / stripe_unit + G * D |
| 496 | * [or (L % U) / stripe_unit + G * D] |
Boaz Harrosh | b367e78 | 2010-02-07 19:18:58 +0200 | [diff] [blame] | 497 | * |
| 498 | * O - The component offset coresponding to L |
Boaz Harrosh | 50a76fd | 2010-02-11 13:01:39 +0200 | [diff] [blame] | 499 | * O = L % stripe_unit + N * stripe_unit + M * group_depth * stripe_unit |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 500 | * |
| 501 | * LCMdP – Parity cycle: Lowest Common Multiple of group_width, parity |
| 502 | * divide by parity |
| 503 | * LCMdP = lcm(group_width, parity) / parity |
| 504 | * |
| 505 | * R - The parity Rotation stripe |
| 506 | * (Note parity cycle always starts at a group's boundary) |
| 507 | * R = N % LCMdP |
| 508 | * |
| 509 | * I = the first parity device index |
| 510 | * I = (group_width + group_width - R*parity - parity) % group_width |
| 511 | * |
| 512 | * Craid - The component index Rotated |
| 513 | * Craid = (group_width + C - R*parity) % group_width |
| 514 | * (We add the group_width to avoid negative numbers modulo math) |
Boaz Harrosh | b367e78 | 2010-02-07 19:18:58 +0200 | [diff] [blame] | 515 | */ |
Boaz Harrosh | 611d7a5 | 2011-10-04 14:20:17 +0200 | [diff] [blame] | 516 | void ore_calc_stripe_info(struct ore_layout *layout, u64 file_offset, |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 517 | u64 length, struct ore_striping_info *si) |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 518 | { |
Boaz Harrosh | 16f75bb | 2011-08-03 20:44:16 -0700 | [diff] [blame] | 519 | u32 stripe_unit = layout->stripe_unit; |
| 520 | u32 group_width = layout->group_width; |
| 521 | u64 group_depth = layout->group_depth; |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 522 | u32 parity = layout->parity; |
Boaz Harrosh | 50a76fd | 2010-02-11 13:01:39 +0200 | [diff] [blame] | 523 | |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 524 | u32 D = group_width - parity; |
| 525 | u32 U = D * stripe_unit; |
Boaz Harrosh | 50a76fd | 2010-02-11 13:01:39 +0200 | [diff] [blame] | 526 | u64 T = U * group_depth; |
Boaz Harrosh | 16f75bb | 2011-08-03 20:44:16 -0700 | [diff] [blame] | 527 | u64 S = T * layout->group_count; |
Boaz Harrosh | 50a76fd | 2010-02-11 13:01:39 +0200 | [diff] [blame] | 528 | u64 M = div64_u64(file_offset, S); |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 529 | |
Boaz Harrosh | 50a76fd | 2010-02-11 13:01:39 +0200 | [diff] [blame] | 530 | /* |
| 531 | G = (L - (M * S)) / T |
| 532 | H = (L - (M * S)) % T |
| 533 | */ |
| 534 | u64 LmodS = file_offset - M * S; |
| 535 | u32 G = div64_u64(LmodS, T); |
| 536 | u64 H = LmodS - G * T; |
Boaz Harrosh | b367e78 | 2010-02-07 19:18:58 +0200 | [diff] [blame] | 537 | |
Boaz Harrosh | 50a76fd | 2010-02-11 13:01:39 +0200 | [diff] [blame] | 538 | u32 N = div_u64(H, U); |
| 539 | |
| 540 | /* "H - (N * U)" is just "H % U" so it's bound to u32 */ |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 541 | u32 C = (u32)(H - (N * U)) / stripe_unit + G * group_width; |
Boaz Harrosh | 50a76fd | 2010-02-11 13:01:39 +0200 | [diff] [blame] | 542 | |
| 543 | div_u64_rem(file_offset, stripe_unit, &si->unit_off); |
| 544 | |
| 545 | si->obj_offset = si->unit_off + (N * stripe_unit) + |
| 546 | (M * group_depth * stripe_unit); |
| 547 | |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 548 | if (parity) { |
| 549 | u32 LCMdP = lcm(group_width, parity) / parity; |
| 550 | /* R = N % LCMdP; */ |
| 551 | u32 RxP = (N % LCMdP) * parity; |
| 552 | u32 first_dev = C - C % group_width; |
| 553 | |
| 554 | si->par_dev = (group_width + group_width - parity - RxP) % |
| 555 | group_width + first_dev; |
| 556 | si->dev = (group_width + C - RxP) % group_width + first_dev; |
| 557 | si->bytes_in_stripe = U; |
| 558 | si->first_stripe_start = M * S + G * T + N * U; |
| 559 | } else { |
| 560 | /* Make the math correct see _prepare_one_group */ |
| 561 | si->par_dev = group_width; |
| 562 | si->dev = C; |
| 563 | } |
| 564 | |
| 565 | si->dev *= layout->mirrors_p1; |
| 566 | si->par_dev *= layout->mirrors_p1; |
| 567 | si->offset = file_offset; |
| 568 | si->length = T - H; |
| 569 | if (si->length > length) |
| 570 | si->length = length; |
Boaz Harrosh | 16f75bb | 2011-08-03 20:44:16 -0700 | [diff] [blame] | 571 | si->M = M; |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 572 | } |
Boaz Harrosh | 611d7a5 | 2011-10-04 14:20:17 +0200 | [diff] [blame] | 573 | EXPORT_SYMBOL(ore_calc_stripe_info); |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 574 | |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 575 | int _ore_add_stripe_unit(struct ore_io_state *ios, unsigned *cur_pg, |
| 576 | unsigned pgbase, struct page **pages, |
| 577 | struct ore_per_dev_state *per_dev, int cur_len) |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 578 | { |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 579 | unsigned pg = *cur_pg; |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 580 | struct request_queue *q = |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 581 | osd_request_queue(_ios_od(ios, per_dev->dev)); |
Boaz Harrosh | bbf9a31 | 2011-08-26 21:04:52 -0700 | [diff] [blame] | 582 | unsigned len = cur_len; |
| 583 | int ret; |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 584 | |
| 585 | if (per_dev->bio == NULL) { |
| 586 | unsigned pages_in_stripe = ios->layout->group_width * |
| 587 | (ios->layout->stripe_unit / PAGE_SIZE); |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 588 | unsigned nr_pages = ios->nr_pages * ios->layout->group_width / |
| 589 | (ios->layout->group_width - |
| 590 | ios->layout->parity); |
| 591 | unsigned bio_size = (nr_pages + pages_in_stripe) / |
| 592 | ios->layout->group_width; |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 593 | |
| 594 | per_dev->bio = bio_kmalloc(GFP_KERNEL, bio_size); |
| 595 | if (unlikely(!per_dev->bio)) { |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 596 | ORE_DBGMSG("Failed to allocate BIO size=%u\n", |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 597 | bio_size); |
Boaz Harrosh | bbf9a31 | 2011-08-26 21:04:52 -0700 | [diff] [blame] | 598 | ret = -ENOMEM; |
| 599 | goto out; |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 600 | } |
| 601 | } |
| 602 | |
| 603 | while (cur_len > 0) { |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 604 | unsigned pglen = min_t(unsigned, PAGE_SIZE - pgbase, cur_len); |
| 605 | unsigned added_len; |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 606 | |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 607 | cur_len -= pglen; |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 608 | |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 609 | added_len = bio_add_pc_page(q, per_dev->bio, pages[pg], |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 610 | pglen, pgbase); |
Boaz Harrosh | bbf9a31 | 2011-08-26 21:04:52 -0700 | [diff] [blame] | 611 | if (unlikely(pglen != added_len)) { |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 612 | ORE_DBGMSG("Failed bio_add_pc_page bi_vcnt=%u\n", |
| 613 | per_dev->bio->bi_vcnt); |
Boaz Harrosh | bbf9a31 | 2011-08-26 21:04:52 -0700 | [diff] [blame] | 614 | ret = -ENOMEM; |
| 615 | goto out; |
| 616 | } |
Boaz Harrosh | 769ba8d | 2011-10-14 15:33:51 +0200 | [diff] [blame] | 617 | _add_stripe_page(ios->sp2d, &ios->si, pages[pg]); |
| 618 | |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 619 | pgbase = 0; |
| 620 | ++pg; |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 621 | } |
| 622 | BUG_ON(cur_len); |
| 623 | |
Boaz Harrosh | bbf9a31 | 2011-08-26 21:04:52 -0700 | [diff] [blame] | 624 | per_dev->length += len; |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 625 | *cur_pg = pg; |
Boaz Harrosh | bbf9a31 | 2011-08-26 21:04:52 -0700 | [diff] [blame] | 626 | ret = 0; |
| 627 | out: /* we fail the complete unit on an error eg don't advance |
| 628 | * per_dev->length and cur_pg. This means that we might have a bigger |
| 629 | * bio than the CDB requested length (per_dev->length). That's fine |
| 630 | * only the oposite is fatal. |
| 631 | */ |
| 632 | return ret; |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 633 | } |
| 634 | |
Boaz Harrosh | 9826075 | 2011-10-02 15:32:50 +0200 | [diff] [blame] | 635 | static int _prepare_for_striping(struct ore_io_state *ios) |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 636 | { |
Boaz Harrosh | 9826075 | 2011-10-02 15:32:50 +0200 | [diff] [blame] | 637 | struct ore_striping_info *si = &ios->si; |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 638 | unsigned stripe_unit = ios->layout->stripe_unit; |
Boaz Harrosh | b367e78 | 2010-02-07 19:18:58 +0200 | [diff] [blame] | 639 | unsigned mirrors_p1 = ios->layout->mirrors_p1; |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 640 | unsigned group_width = ios->layout->group_width; |
| 641 | unsigned devs_in_group = group_width * mirrors_p1; |
Boaz Harrosh | b367e78 | 2010-02-07 19:18:58 +0200 | [diff] [blame] | 642 | unsigned dev = si->dev; |
Boaz Harrosh | 50a76fd | 2010-02-11 13:01:39 +0200 | [diff] [blame] | 643 | unsigned first_dev = dev - (dev % devs_in_group); |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 644 | unsigned dev_order; |
Boaz Harrosh | 50a76fd | 2010-02-11 13:01:39 +0200 | [diff] [blame] | 645 | unsigned cur_pg = ios->pages_consumed; |
Boaz Harrosh | 9826075 | 2011-10-02 15:32:50 +0200 | [diff] [blame] | 646 | u64 length = ios->length; |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 647 | int ret = 0; |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 648 | |
Boaz Harrosh | 9826075 | 2011-10-02 15:32:50 +0200 | [diff] [blame] | 649 | if (!ios->pages) { |
Boaz Harrosh | 9826075 | 2011-10-02 15:32:50 +0200 | [diff] [blame] | 650 | ios->numdevs = ios->layout->mirrors_p1; |
| 651 | return 0; |
| 652 | } |
| 653 | |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 654 | BUG_ON(length > si->length); |
| 655 | |
| 656 | dev_order = _dev_order(devs_in_group, mirrors_p1, si->par_dev, dev); |
| 657 | si->cur_comp = dev_order; |
Boaz Harrosh | 769ba8d | 2011-10-14 15:33:51 +0200 | [diff] [blame] | 658 | si->cur_pg = si->unit_off / PAGE_SIZE; |
Boaz Harrosh | 9826075 | 2011-10-02 15:32:50 +0200 | [diff] [blame] | 659 | |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 660 | while (length) { |
Boaz Harrosh | b916c5c | 2011-09-28 11:55:51 +0300 | [diff] [blame] | 661 | unsigned comp = dev - first_dev; |
| 662 | struct ore_per_dev_state *per_dev = &ios->per_dev[comp]; |
Boaz Harrosh | b367e78 | 2010-02-07 19:18:58 +0200 | [diff] [blame] | 663 | unsigned cur_len, page_off = 0; |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 664 | |
| 665 | if (!per_dev->length) { |
Boaz Harrosh | b367e78 | 2010-02-07 19:18:58 +0200 | [diff] [blame] | 666 | per_dev->dev = dev; |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 667 | if (dev == si->dev) { |
| 668 | WARN_ON(dev == si->par_dev); |
Boaz Harrosh | b367e78 | 2010-02-07 19:18:58 +0200 | [diff] [blame] | 669 | per_dev->offset = si->obj_offset; |
| 670 | cur_len = stripe_unit - si->unit_off; |
| 671 | page_off = si->unit_off & ~PAGE_MASK; |
| 672 | BUG_ON(page_off && (page_off != ios->pgbase)); |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 673 | } else { |
| 674 | if (si->cur_comp > dev_order) |
| 675 | per_dev->offset = |
| 676 | si->obj_offset - si->unit_off; |
| 677 | else /* si->cur_comp < dev_order */ |
| 678 | per_dev->offset = |
| 679 | si->obj_offset + stripe_unit - |
| 680 | si->unit_off; |
Boaz Harrosh | b367e78 | 2010-02-07 19:18:58 +0200 | [diff] [blame] | 681 | cur_len = stripe_unit; |
| 682 | } |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 683 | } else { |
Boaz Harrosh | b367e78 | 2010-02-07 19:18:58 +0200 | [diff] [blame] | 684 | cur_len = stripe_unit; |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 685 | } |
Boaz Harrosh | b367e78 | 2010-02-07 19:18:58 +0200 | [diff] [blame] | 686 | if (cur_len >= length) |
| 687 | cur_len = length; |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 688 | |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 689 | ret = _ore_add_stripe_unit(ios, &cur_pg, page_off, ios->pages, |
| 690 | per_dev, cur_len); |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 691 | if (unlikely(ret)) |
| 692 | goto out; |
| 693 | |
Boaz Harrosh | 6e31609 | 2010-07-29 17:08:13 +0300 | [diff] [blame] | 694 | dev += mirrors_p1; |
| 695 | dev = (dev % devs_in_group) + first_dev; |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 696 | |
| 697 | length -= cur_len; |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 698 | |
| 699 | si->cur_comp = (si->cur_comp + 1) % group_width; |
Boaz Harrosh | 769ba8d | 2011-10-14 15:33:51 +0200 | [diff] [blame] | 700 | if (unlikely((dev == si->par_dev) || (!length && ios->sp2d))) { |
| 701 | if (!length && ios->sp2d) { |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 702 | /* If we are writing and this is the very last |
| 703 | * stripe. then operate on parity dev. |
| 704 | */ |
| 705 | dev = si->par_dev; |
Boaz Harrosh | 769ba8d | 2011-10-14 15:33:51 +0200 | [diff] [blame] | 706 | } |
| 707 | if (ios->sp2d) |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 708 | /* In writes cur_len just means if it's the |
| 709 | * last one. See _ore_add_parity_unit. |
| 710 | */ |
| 711 | cur_len = length; |
| 712 | per_dev = &ios->per_dev[dev - first_dev]; |
| 713 | if (!per_dev->length) { |
| 714 | /* Only/always the parity unit of the first |
| 715 | * stripe will be empty. So this is a chance to |
| 716 | * initialize the per_dev info. |
| 717 | */ |
| 718 | per_dev->dev = dev; |
| 719 | per_dev->offset = si->obj_offset - si->unit_off; |
| 720 | } |
| 721 | |
| 722 | ret = _ore_add_parity_unit(ios, si, per_dev, cur_len); |
| 723 | if (unlikely(ret)) |
| 724 | goto out; |
| 725 | |
| 726 | /* Rotate next par_dev backwards with wraping */ |
| 727 | si->par_dev = (devs_in_group + si->par_dev - |
| 728 | ios->layout->parity * mirrors_p1) % |
| 729 | devs_in_group + first_dev; |
| 730 | /* Next stripe, start fresh */ |
| 731 | si->cur_comp = 0; |
Boaz Harrosh | 769ba8d | 2011-10-14 15:33:51 +0200 | [diff] [blame] | 732 | si->cur_pg = 0; |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 733 | } |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 734 | } |
| 735 | out: |
Boaz Harrosh | b916c5c | 2011-09-28 11:55:51 +0300 | [diff] [blame] | 736 | ios->numdevs = devs_in_group; |
Boaz Harrosh | 50a76fd | 2010-02-11 13:01:39 +0200 | [diff] [blame] | 737 | ios->pages_consumed = cur_pg; |
Boaz Harrosh | bbf9a31 | 2011-08-26 21:04:52 -0700 | [diff] [blame] | 738 | if (unlikely(ret)) { |
| 739 | if (length == ios->length) |
| 740 | return ret; |
| 741 | else |
| 742 | ios->length -= length; |
| 743 | } |
| 744 | return 0; |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 745 | } |
| 746 | |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 747 | int ore_create(struct ore_io_state *ios) |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 748 | { |
| 749 | int i, ret; |
| 750 | |
Boaz Harrosh | 5bf696d | 2011-09-28 11:39:59 +0300 | [diff] [blame] | 751 | for (i = 0; i < ios->oc->numdevs; i++) { |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 752 | struct osd_request *or; |
| 753 | |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 754 | or = osd_start_request(_ios_od(ios, i), GFP_KERNEL); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 755 | if (unlikely(!or)) { |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 756 | ORE_ERR("%s: osd_start_request failed\n", __func__); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 757 | ret = -ENOMEM; |
| 758 | goto out; |
| 759 | } |
| 760 | ios->per_dev[i].or = or; |
| 761 | ios->numdevs++; |
| 762 | |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 763 | osd_req_create_object(or, _ios_obj(ios, i)); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 764 | } |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 765 | ret = ore_io_execute(ios); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 766 | |
| 767 | out: |
| 768 | return ret; |
| 769 | } |
Boaz Harrosh | cf283ad | 2011-08-06 19:22:06 -0700 | [diff] [blame] | 770 | EXPORT_SYMBOL(ore_create); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 771 | |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 772 | int ore_remove(struct ore_io_state *ios) |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 773 | { |
| 774 | int i, ret; |
| 775 | |
Boaz Harrosh | 5bf696d | 2011-09-28 11:39:59 +0300 | [diff] [blame] | 776 | for (i = 0; i < ios->oc->numdevs; i++) { |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 777 | struct osd_request *or; |
| 778 | |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 779 | or = osd_start_request(_ios_od(ios, i), GFP_KERNEL); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 780 | if (unlikely(!or)) { |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 781 | ORE_ERR("%s: osd_start_request failed\n", __func__); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 782 | ret = -ENOMEM; |
| 783 | goto out; |
| 784 | } |
| 785 | ios->per_dev[i].or = or; |
| 786 | ios->numdevs++; |
| 787 | |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 788 | osd_req_remove_object(or, _ios_obj(ios, i)); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 789 | } |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 790 | ret = ore_io_execute(ios); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 791 | |
| 792 | out: |
| 793 | return ret; |
| 794 | } |
Boaz Harrosh | cf283ad | 2011-08-06 19:22:06 -0700 | [diff] [blame] | 795 | EXPORT_SYMBOL(ore_remove); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 796 | |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 797 | static int _write_mirror(struct ore_io_state *ios, int cur_comp) |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 798 | { |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 799 | struct ore_per_dev_state *master_dev = &ios->per_dev[cur_comp]; |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 800 | unsigned dev = ios->per_dev[cur_comp].dev; |
| 801 | unsigned last_comp = cur_comp + ios->layout->mirrors_p1; |
| 802 | int ret = 0; |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 803 | |
Boaz Harrosh | 50a76fd | 2010-02-11 13:01:39 +0200 | [diff] [blame] | 804 | if (ios->pages && !master_dev->length) |
| 805 | return 0; /* Just an empty slot */ |
| 806 | |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 807 | for (; cur_comp < last_comp; ++cur_comp, ++dev) { |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 808 | struct ore_per_dev_state *per_dev = &ios->per_dev[cur_comp]; |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 809 | struct osd_request *or; |
| 810 | |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 811 | or = osd_start_request(_ios_od(ios, dev), GFP_KERNEL); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 812 | if (unlikely(!or)) { |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 813 | ORE_ERR("%s: osd_start_request failed\n", __func__); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 814 | ret = -ENOMEM; |
| 815 | goto out; |
| 816 | } |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 817 | per_dev->or = or; |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 818 | |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 819 | if (ios->pages) { |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 820 | struct bio *bio; |
| 821 | |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 822 | if (per_dev != master_dev) { |
Boaz Harrosh | 04dc1e8 | 2009-11-16 16:03:05 +0200 | [diff] [blame] | 823 | bio = bio_kmalloc(GFP_KERNEL, |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 824 | master_dev->bio->bi_max_vecs); |
Boaz Harrosh | 04dc1e8 | 2009-11-16 16:03:05 +0200 | [diff] [blame] | 825 | if (unlikely(!bio)) { |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 826 | ORE_DBGMSG( |
Paul Bolle | 426d310 | 2010-08-07 12:30:03 +0200 | [diff] [blame] | 827 | "Failed to allocate BIO size=%u\n", |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 828 | master_dev->bio->bi_max_vecs); |
Boaz Harrosh | 04dc1e8 | 2009-11-16 16:03:05 +0200 | [diff] [blame] | 829 | ret = -ENOMEM; |
| 830 | goto out; |
| 831 | } |
| 832 | |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 833 | __bio_clone(bio, master_dev->bio); |
Boaz Harrosh | 04dc1e8 | 2009-11-16 16:03:05 +0200 | [diff] [blame] | 834 | bio->bi_bdev = NULL; |
| 835 | bio->bi_next = NULL; |
Boaz Harrosh | 6851a5e | 2011-08-24 18:10:49 -0700 | [diff] [blame] | 836 | per_dev->offset = master_dev->offset; |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 837 | per_dev->length = master_dev->length; |
| 838 | per_dev->bio = bio; |
| 839 | per_dev->dev = dev; |
Boaz Harrosh | 04dc1e8 | 2009-11-16 16:03:05 +0200 | [diff] [blame] | 840 | } else { |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 841 | bio = master_dev->bio; |
| 842 | /* FIXME: bio_set_dir() */ |
Christoph Hellwig | 7b6d91d | 2010-08-07 18:20:39 +0200 | [diff] [blame] | 843 | bio->bi_rw |= REQ_WRITE; |
Boaz Harrosh | 04dc1e8 | 2009-11-16 16:03:05 +0200 | [diff] [blame] | 844 | } |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 845 | |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 846 | osd_req_write(or, _ios_obj(ios, dev), per_dev->offset, |
| 847 | bio, per_dev->length); |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 848 | ORE_DBGMSG("write(0x%llx) offset=0x%llx " |
Boaz Harrosh | 34ce4e7 | 2009-12-15 19:34:17 +0200 | [diff] [blame] | 849 | "length=0x%llx dev=%d\n", |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 850 | _LLU(_ios_obj(ios, dev)->id), |
| 851 | _LLU(per_dev->offset), |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 852 | _LLU(per_dev->length), dev); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 853 | } else if (ios->kern_buff) { |
Boaz Harrosh | 6851a5e | 2011-08-24 18:10:49 -0700 | [diff] [blame] | 854 | per_dev->offset = ios->si.obj_offset; |
| 855 | per_dev->dev = ios->si.dev + dev; |
| 856 | |
| 857 | /* no cross device without page array */ |
| 858 | BUG_ON((ios->layout->group_width > 1) && |
| 859 | (ios->si.unit_off + ios->length > |
| 860 | ios->layout->stripe_unit)); |
| 861 | |
| 862 | ret = osd_req_write_kern(or, _ios_obj(ios, per_dev->dev), |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 863 | per_dev->offset, |
| 864 | ios->kern_buff, ios->length); |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 865 | if (unlikely(ret)) |
| 866 | goto out; |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 867 | ORE_DBGMSG2("write_kern(0x%llx) offset=0x%llx " |
Boaz Harrosh | 34ce4e7 | 2009-12-15 19:34:17 +0200 | [diff] [blame] | 868 | "length=0x%llx dev=%d\n", |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 869 | _LLU(_ios_obj(ios, dev)->id), |
| 870 | _LLU(per_dev->offset), |
Boaz Harrosh | 6851a5e | 2011-08-24 18:10:49 -0700 | [diff] [blame] | 871 | _LLU(ios->length), per_dev->dev); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 872 | } else { |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 873 | osd_req_set_attributes(or, _ios_obj(ios, dev)); |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 874 | ORE_DBGMSG2("obj(0x%llx) set_attributes=%d dev=%d\n", |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 875 | _LLU(_ios_obj(ios, dev)->id), |
| 876 | ios->out_attr_len, dev); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 877 | } |
| 878 | |
| 879 | if (ios->out_attr) |
| 880 | osd_req_add_set_attr_list(or, ios->out_attr, |
| 881 | ios->out_attr_len); |
| 882 | |
| 883 | if (ios->in_attr) |
| 884 | osd_req_add_get_attr_list(or, ios->in_attr, |
| 885 | ios->in_attr_len); |
| 886 | } |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 887 | |
| 888 | out: |
| 889 | return ret; |
| 890 | } |
| 891 | |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 892 | int ore_write(struct ore_io_state *ios) |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 893 | { |
| 894 | int i; |
| 895 | int ret; |
| 896 | |
Boaz Harrosh | 769ba8d | 2011-10-14 15:33:51 +0200 | [diff] [blame] | 897 | if (unlikely(ios->sp2d && !ios->r4w)) { |
| 898 | /* A library is attempting a RAID-write without providing |
| 899 | * a pages lock interface. |
| 900 | */ |
| 901 | WARN_ON_ONCE(1); |
| 902 | return -ENOTSUPP; |
| 903 | } |
| 904 | |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 905 | ret = _prepare_for_striping(ios); |
| 906 | if (unlikely(ret)) |
| 907 | return ret; |
| 908 | |
| 909 | for (i = 0; i < ios->numdevs; i += ios->layout->mirrors_p1) { |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 910 | ret = _write_mirror(ios, i); |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 911 | if (unlikely(ret)) |
| 912 | return ret; |
| 913 | } |
| 914 | |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 915 | ret = ore_io_execute(ios); |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 916 | return ret; |
| 917 | } |
Boaz Harrosh | cf283ad | 2011-08-06 19:22:06 -0700 | [diff] [blame] | 918 | EXPORT_SYMBOL(ore_write); |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 919 | |
Boaz Harrosh | 769ba8d | 2011-10-14 15:33:51 +0200 | [diff] [blame] | 920 | int _ore_read_mirror(struct ore_io_state *ios, unsigned cur_comp) |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 921 | { |
Boaz Harrosh | 46f4d97 | 2010-02-01 11:37:30 +0200 | [diff] [blame] | 922 | struct osd_request *or; |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 923 | struct ore_per_dev_state *per_dev = &ios->per_dev[cur_comp]; |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 924 | struct osd_obj_id *obj = _ios_obj(ios, cur_comp); |
| 925 | unsigned first_dev = (unsigned)obj->id; |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 926 | |
Boaz Harrosh | 50a76fd | 2010-02-11 13:01:39 +0200 | [diff] [blame] | 927 | if (ios->pages && !per_dev->length) |
| 928 | return 0; /* Just an empty slot */ |
| 929 | |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 930 | first_dev = per_dev->dev + first_dev % ios->layout->mirrors_p1; |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 931 | or = osd_start_request(_ios_od(ios, first_dev), GFP_KERNEL); |
Boaz Harrosh | 46f4d97 | 2010-02-01 11:37:30 +0200 | [diff] [blame] | 932 | if (unlikely(!or)) { |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 933 | ORE_ERR("%s: osd_start_request failed\n", __func__); |
Boaz Harrosh | 46f4d97 | 2010-02-01 11:37:30 +0200 | [diff] [blame] | 934 | return -ENOMEM; |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 935 | } |
Boaz Harrosh | 46f4d97 | 2010-02-01 11:37:30 +0200 | [diff] [blame] | 936 | per_dev->or = or; |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 937 | |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 938 | if (ios->pages) { |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 939 | if (per_dev->cur_sg) { |
| 940 | /* finalize the last sg_entry */ |
| 941 | _ore_add_sg_seg(per_dev, 0, false); |
| 942 | if (unlikely(!per_dev->cur_sg)) |
| 943 | return 0; /* Skip parity only device */ |
| 944 | |
| 945 | osd_req_read_sg(or, obj, per_dev->bio, |
| 946 | per_dev->sglist, per_dev->cur_sg); |
| 947 | } else { |
| 948 | /* The no raid case */ |
| 949 | osd_req_read(or, obj, per_dev->offset, |
| 950 | per_dev->bio, per_dev->length); |
| 951 | } |
| 952 | |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 953 | ORE_DBGMSG("read(0x%llx) offset=0x%llx length=0x%llx" |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 954 | " dev=%d sg_len=%d\n", _LLU(obj->id), |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 955 | _LLU(per_dev->offset), _LLU(per_dev->length), |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 956 | first_dev, per_dev->cur_sg); |
Boaz Harrosh | 46f4d97 | 2010-02-01 11:37:30 +0200 | [diff] [blame] | 957 | } else { |
Boaz Harrosh | 6851a5e | 2011-08-24 18:10:49 -0700 | [diff] [blame] | 958 | BUG_ON(ios->kern_buff); |
| 959 | |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 960 | osd_req_get_attributes(or, obj); |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 961 | ORE_DBGMSG2("obj(0x%llx) get_attributes=%d dev=%d\n", |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 962 | _LLU(obj->id), |
| 963 | ios->in_attr_len, first_dev); |
Boaz Harrosh | 46f4d97 | 2010-02-01 11:37:30 +0200 | [diff] [blame] | 964 | } |
Boaz Harrosh | 46f4d97 | 2010-02-01 11:37:30 +0200 | [diff] [blame] | 965 | if (ios->out_attr) |
| 966 | osd_req_add_set_attr_list(or, ios->out_attr, ios->out_attr_len); |
| 967 | |
| 968 | if (ios->in_attr) |
| 969 | osd_req_add_get_attr_list(or, ios->in_attr, ios->in_attr_len); |
| 970 | |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 971 | return 0; |
| 972 | } |
| 973 | |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 974 | int ore_read(struct ore_io_state *ios) |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 975 | { |
| 976 | int i; |
| 977 | int ret; |
| 978 | |
| 979 | ret = _prepare_for_striping(ios); |
| 980 | if (unlikely(ret)) |
| 981 | return ret; |
| 982 | |
| 983 | for (i = 0; i < ios->numdevs; i += ios->layout->mirrors_p1) { |
Boaz Harrosh | 769ba8d | 2011-10-14 15:33:51 +0200 | [diff] [blame] | 984 | ret = _ore_read_mirror(ios, i); |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 985 | if (unlikely(ret)) |
| 986 | return ret; |
| 987 | } |
| 988 | |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 989 | ret = ore_io_execute(ios); |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 990 | return ret; |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 991 | } |
Boaz Harrosh | cf283ad | 2011-08-06 19:22:06 -0700 | [diff] [blame] | 992 | EXPORT_SYMBOL(ore_read); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 993 | |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 994 | int extract_attr_from_ios(struct ore_io_state *ios, struct osd_attr *attr) |
Boaz Harrosh | b14f8ab | 2008-10-27 18:27:55 +0200 | [diff] [blame] | 995 | { |
| 996 | struct osd_attr cur_attr = {.attr_page = 0}; /* start with zeros */ |
| 997 | void *iter = NULL; |
| 998 | int nelem; |
| 999 | |
| 1000 | do { |
| 1001 | nelem = 1; |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1002 | osd_req_decode_get_attr_list(ios->per_dev[0].or, |
| 1003 | &cur_attr, &nelem, &iter); |
Boaz Harrosh | b14f8ab | 2008-10-27 18:27:55 +0200 | [diff] [blame] | 1004 | if ((cur_attr.attr_page == attr->attr_page) && |
| 1005 | (cur_attr.attr_id == attr->attr_id)) { |
| 1006 | attr->len = cur_attr.len; |
| 1007 | attr->val_ptr = cur_attr.val_ptr; |
| 1008 | return 0; |
| 1009 | } |
| 1010 | } while (iter); |
| 1011 | |
| 1012 | return -EIO; |
| 1013 | } |
Boaz Harrosh | cf283ad | 2011-08-06 19:22:06 -0700 | [diff] [blame] | 1014 | EXPORT_SYMBOL(extract_attr_from_ios); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1015 | |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 1016 | static int _truncate_mirrors(struct ore_io_state *ios, unsigned cur_comp, |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 1017 | struct osd_attr *attr) |
| 1018 | { |
| 1019 | int last_comp = cur_comp + ios->layout->mirrors_p1; |
| 1020 | |
| 1021 | for (; cur_comp < last_comp; ++cur_comp) { |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 1022 | struct ore_per_dev_state *per_dev = &ios->per_dev[cur_comp]; |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 1023 | struct osd_request *or; |
| 1024 | |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 1025 | or = osd_start_request(_ios_od(ios, cur_comp), GFP_KERNEL); |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 1026 | if (unlikely(!or)) { |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 1027 | ORE_ERR("%s: osd_start_request failed\n", __func__); |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 1028 | return -ENOMEM; |
| 1029 | } |
| 1030 | per_dev->or = or; |
| 1031 | |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 1032 | osd_req_set_attributes(or, _ios_obj(ios, cur_comp)); |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 1033 | osd_req_add_set_attr_list(or, attr, 1); |
| 1034 | } |
| 1035 | |
| 1036 | return 0; |
| 1037 | } |
| 1038 | |
Boaz Harrosh | 16f75bb | 2011-08-03 20:44:16 -0700 | [diff] [blame] | 1039 | struct _trunc_info { |
Boaz Harrosh | eb507bc | 2011-08-10 14:17:28 -0700 | [diff] [blame] | 1040 | struct ore_striping_info si; |
Boaz Harrosh | 16f75bb | 2011-08-03 20:44:16 -0700 | [diff] [blame] | 1041 | u64 prev_group_obj_off; |
| 1042 | u64 next_group_obj_off; |
| 1043 | |
| 1044 | unsigned first_group_dev; |
| 1045 | unsigned nex_group_dev; |
Boaz Harrosh | 16f75bb | 2011-08-03 20:44:16 -0700 | [diff] [blame] | 1046 | }; |
| 1047 | |
H Hartley Sweeten | 1958c7c2 | 2011-09-23 13:42:43 -0700 | [diff] [blame] | 1048 | static void _calc_trunk_info(struct ore_layout *layout, u64 file_offset, |
| 1049 | struct _trunc_info *ti) |
Boaz Harrosh | 16f75bb | 2011-08-03 20:44:16 -0700 | [diff] [blame] | 1050 | { |
| 1051 | unsigned stripe_unit = layout->stripe_unit; |
| 1052 | |
Boaz Harrosh | a1fec1d | 2011-10-12 18:42:22 +0200 | [diff] [blame] | 1053 | ore_calc_stripe_info(layout, file_offset, 0, &ti->si); |
Boaz Harrosh | 16f75bb | 2011-08-03 20:44:16 -0700 | [diff] [blame] | 1054 | |
| 1055 | ti->prev_group_obj_off = ti->si.M * stripe_unit; |
| 1056 | ti->next_group_obj_off = ti->si.M ? (ti->si.M - 1) * stripe_unit : 0; |
| 1057 | |
| 1058 | ti->first_group_dev = ti->si.dev - (ti->si.dev % layout->group_width); |
| 1059 | ti->nex_group_dev = ti->first_group_dev + layout->group_width; |
Boaz Harrosh | 16f75bb | 2011-08-03 20:44:16 -0700 | [diff] [blame] | 1060 | } |
| 1061 | |
Boaz Harrosh | 5bf696d | 2011-09-28 11:39:59 +0300 | [diff] [blame] | 1062 | int ore_truncate(struct ore_layout *layout, struct ore_components *oc, |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 1063 | u64 size) |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1064 | { |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 1065 | struct ore_io_state *ios; |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 1066 | struct exofs_trunc_attr { |
| 1067 | struct osd_attr attr; |
| 1068 | __be64 newsize; |
| 1069 | } *size_attrs; |
Boaz Harrosh | 16f75bb | 2011-08-03 20:44:16 -0700 | [diff] [blame] | 1070 | struct _trunc_info ti; |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1071 | int i, ret; |
| 1072 | |
Boaz Harrosh | 5bf696d | 2011-09-28 11:39:59 +0300 | [diff] [blame] | 1073 | ret = ore_get_io_state(layout, oc, &ios); |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 1074 | if (unlikely(ret)) |
| 1075 | return ret; |
| 1076 | |
Boaz Harrosh | 16f75bb | 2011-08-03 20:44:16 -0700 | [diff] [blame] | 1077 | _calc_trunk_info(ios->layout, size, &ti); |
| 1078 | |
Boaz Harrosh | b916c5c | 2011-09-28 11:55:51 +0300 | [diff] [blame] | 1079 | size_attrs = kcalloc(ios->oc->numdevs, sizeof(*size_attrs), |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 1080 | GFP_KERNEL); |
| 1081 | if (unlikely(!size_attrs)) { |
| 1082 | ret = -ENOMEM; |
| 1083 | goto out; |
| 1084 | } |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1085 | |
Boaz Harrosh | 5bf696d | 2011-09-28 11:39:59 +0300 | [diff] [blame] | 1086 | ios->numdevs = ios->oc->numdevs; |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1087 | |
Boaz Harrosh | b916c5c | 2011-09-28 11:55:51 +0300 | [diff] [blame] | 1088 | for (i = 0; i < ios->numdevs; ++i) { |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 1089 | struct exofs_trunc_attr *size_attr = &size_attrs[i]; |
| 1090 | u64 obj_size; |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1091 | |
Boaz Harrosh | 16f75bb | 2011-08-03 20:44:16 -0700 | [diff] [blame] | 1092 | if (i < ti.first_group_dev) |
| 1093 | obj_size = ti.prev_group_obj_off; |
| 1094 | else if (i >= ti.nex_group_dev) |
| 1095 | obj_size = ti.next_group_obj_off; |
| 1096 | else if (i < ti.si.dev) /* dev within this group */ |
| 1097 | obj_size = ti.si.obj_offset + |
| 1098 | ios->layout->stripe_unit - ti.si.unit_off; |
| 1099 | else if (i == ti.si.dev) |
| 1100 | obj_size = ti.si.obj_offset; |
| 1101 | else /* i > ti.dev */ |
| 1102 | obj_size = ti.si.obj_offset - ti.si.unit_off; |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 1103 | |
| 1104 | size_attr->newsize = cpu_to_be64(obj_size); |
| 1105 | size_attr->attr = g_attr_logical_length; |
| 1106 | size_attr->attr.val_ptr = &size_attr->newsize; |
| 1107 | |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 1108 | ORE_DBGMSG("trunc(0x%llx) obj_offset=0x%llx dev=%d\n", |
Boaz Harrosh | 5bf696d | 2011-09-28 11:39:59 +0300 | [diff] [blame] | 1109 | _LLU(oc->comps->obj.id), _LLU(obj_size), i); |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 1110 | ret = _truncate_mirrors(ios, i * ios->layout->mirrors_p1, |
| 1111 | &size_attr->attr); |
| 1112 | if (unlikely(ret)) |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1113 | goto out; |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1114 | } |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 1115 | ret = ore_io_execute(ios); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1116 | |
| 1117 | out: |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 1118 | kfree(size_attrs); |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 1119 | ore_put_io_state(ios); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1120 | return ret; |
| 1121 | } |
Boaz Harrosh | cf283ad | 2011-08-06 19:22:06 -0700 | [diff] [blame] | 1122 | EXPORT_SYMBOL(ore_truncate); |
Boaz Harrosh | 85e44df | 2011-05-16 15:26:47 +0300 | [diff] [blame] | 1123 | |
| 1124 | const struct osd_attr g_attr_logical_length = ATTR_DEF( |
| 1125 | OSD_APAGE_OBJECT_INFORMATION, OSD_ATTR_OI_LOGICAL_LENGTH, 8); |
Boaz Harrosh | cf283ad | 2011-08-06 19:22:06 -0700 | [diff] [blame] | 1126 | EXPORT_SYMBOL(g_attr_logical_length); |