Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /* |
| 3 | * |
| 4 | * Copyright (C) 2019-2021 Paragon Software GmbH, All rights reserved. |
| 5 | * |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 6 | * TODO: Merge attr_set_size/attr_data_get_block/attr_allocate_frame? |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 7 | */ |
| 8 | |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 9 | #include <linux/fs.h> |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 10 | #include <linux/slab.h> |
Kari Argillander | 6e3331e | 2021-09-07 17:28:42 +0300 | [diff] [blame] | 11 | #include <linux/kernel.h> |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 12 | |
| 13 | #include "debug.h" |
| 14 | #include "ntfs.h" |
| 15 | #include "ntfs_fs.h" |
| 16 | |
| 17 | /* |
| 18 | * You can set external NTFS_MIN_LOG2_OF_CLUMP/NTFS_MAX_LOG2_OF_CLUMP to manage |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 19 | * preallocate algorithm. |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 20 | */ |
| 21 | #ifndef NTFS_MIN_LOG2_OF_CLUMP |
| 22 | #define NTFS_MIN_LOG2_OF_CLUMP 16 |
| 23 | #endif |
| 24 | |
| 25 | #ifndef NTFS_MAX_LOG2_OF_CLUMP |
| 26 | #define NTFS_MAX_LOG2_OF_CLUMP 26 |
| 27 | #endif |
| 28 | |
| 29 | // 16M |
| 30 | #define NTFS_CLUMP_MIN (1 << (NTFS_MIN_LOG2_OF_CLUMP + 8)) |
| 31 | // 16G |
| 32 | #define NTFS_CLUMP_MAX (1ull << (NTFS_MAX_LOG2_OF_CLUMP + 8)) |
| 33 | |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 34 | static inline u64 get_pre_allocated(u64 size) |
| 35 | { |
| 36 | u32 clump; |
| 37 | u8 align_shift; |
| 38 | u64 ret; |
| 39 | |
| 40 | if (size <= NTFS_CLUMP_MIN) { |
| 41 | clump = 1 << NTFS_MIN_LOG2_OF_CLUMP; |
| 42 | align_shift = NTFS_MIN_LOG2_OF_CLUMP; |
| 43 | } else if (size >= NTFS_CLUMP_MAX) { |
| 44 | clump = 1 << NTFS_MAX_LOG2_OF_CLUMP; |
| 45 | align_shift = NTFS_MAX_LOG2_OF_CLUMP; |
| 46 | } else { |
| 47 | align_shift = NTFS_MIN_LOG2_OF_CLUMP - 1 + |
| 48 | __ffs(size >> (8 + NTFS_MIN_LOG2_OF_CLUMP)); |
| 49 | clump = 1u << align_shift; |
| 50 | } |
| 51 | |
| 52 | ret = (((size + clump - 1) >> align_shift)) << align_shift; |
| 53 | |
| 54 | return ret; |
| 55 | } |
| 56 | |
| 57 | /* |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 58 | * attr_load_runs - Load all runs stored in @attr. |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 59 | */ |
Konstantin Komarov | cf760ec | 2022-07-01 15:15:32 +0300 | [diff] [blame] | 60 | static int attr_load_runs(struct ATTRIB *attr, struct ntfs_inode *ni, |
| 61 | struct runs_tree *run, const CLST *vcn) |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 62 | { |
| 63 | int err; |
| 64 | CLST svcn = le64_to_cpu(attr->nres.svcn); |
| 65 | CLST evcn = le64_to_cpu(attr->nres.evcn); |
| 66 | u32 asize; |
| 67 | u16 run_off; |
| 68 | |
| 69 | if (svcn >= evcn + 1 || run_is_mapped_full(run, svcn, evcn)) |
| 70 | return 0; |
| 71 | |
| 72 | if (vcn && (evcn < *vcn || *vcn < svcn)) |
| 73 | return -EINVAL; |
| 74 | |
| 75 | asize = le32_to_cpu(attr->size); |
| 76 | run_off = le16_to_cpu(attr->nres.run_off); |
Edward Lo | 6db6208 | 2022-08-06 00:47:27 +0800 | [diff] [blame] | 77 | |
| 78 | if (run_off > asize) |
| 79 | return -EINVAL; |
| 80 | |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 81 | err = run_unpack_ex(run, ni->mi.sbi, ni->mi.rno, svcn, evcn, |
| 82 | vcn ? *vcn : svcn, Add2Ptr(attr, run_off), |
| 83 | asize - run_off); |
| 84 | if (err < 0) |
| 85 | return err; |
| 86 | |
| 87 | return 0; |
| 88 | } |
| 89 | |
| 90 | /* |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 91 | * run_deallocate_ex - Deallocate clusters. |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 92 | */ |
| 93 | static int run_deallocate_ex(struct ntfs_sb_info *sbi, struct runs_tree *run, |
| 94 | CLST vcn, CLST len, CLST *done, bool trim) |
| 95 | { |
| 96 | int err = 0; |
| 97 | CLST vcn_next, vcn0 = vcn, lcn, clen, dn = 0; |
| 98 | size_t idx; |
| 99 | |
| 100 | if (!len) |
| 101 | goto out; |
| 102 | |
| 103 | if (!run_lookup_entry(run, vcn, &lcn, &clen, &idx)) { |
| 104 | failed: |
| 105 | run_truncate(run, vcn0); |
| 106 | err = -EINVAL; |
| 107 | goto out; |
| 108 | } |
| 109 | |
| 110 | for (;;) { |
| 111 | if (clen > len) |
| 112 | clen = len; |
| 113 | |
| 114 | if (!clen) { |
| 115 | err = -EINVAL; |
| 116 | goto out; |
| 117 | } |
| 118 | |
| 119 | if (lcn != SPARSE_LCN) { |
Konstantin Komarov | 20abc64 | 2022-07-13 18:18:48 +0300 | [diff] [blame] | 120 | if (sbi) { |
| 121 | /* mark bitmap range [lcn + clen) as free and trim clusters. */ |
| 122 | mark_as_free_ex(sbi, lcn, clen, trim); |
| 123 | } |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 124 | dn += clen; |
| 125 | } |
| 126 | |
| 127 | len -= clen; |
| 128 | if (!len) |
| 129 | break; |
| 130 | |
| 131 | vcn_next = vcn + clen; |
| 132 | if (!run_get_entry(run, ++idx, &vcn, &lcn, &clen) || |
| 133 | vcn != vcn_next) { |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 134 | /* Save memory - don't load entire run. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 135 | goto failed; |
| 136 | } |
| 137 | } |
| 138 | |
| 139 | out: |
| 140 | if (done) |
| 141 | *done += dn; |
| 142 | |
| 143 | return err; |
| 144 | } |
| 145 | |
| 146 | /* |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 147 | * attr_allocate_clusters - Find free space, mark it as used and store in @run. |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 148 | */ |
| 149 | int attr_allocate_clusters(struct ntfs_sb_info *sbi, struct runs_tree *run, |
| 150 | CLST vcn, CLST lcn, CLST len, CLST *pre_alloc, |
| 151 | enum ALLOCATE_OPT opt, CLST *alen, const size_t fr, |
Konstantin Komarov | c380b52 | 2022-10-07 14:02:36 +0300 | [diff] [blame] | 152 | CLST *new_lcn, CLST *new_len) |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 153 | { |
| 154 | int err; |
| 155 | CLST flen, vcn0 = vcn, pre = pre_alloc ? *pre_alloc : 0; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 156 | size_t cnt = run->count; |
| 157 | |
| 158 | for (;;) { |
| 159 | err = ntfs_look_for_free_space(sbi, lcn, len + pre, &lcn, &flen, |
| 160 | opt); |
| 161 | |
| 162 | if (err == -ENOSPC && pre) { |
| 163 | pre = 0; |
| 164 | if (*pre_alloc) |
| 165 | *pre_alloc = 0; |
| 166 | continue; |
| 167 | } |
| 168 | |
| 169 | if (err) |
| 170 | goto out; |
| 171 | |
Konstantin Komarov | c380b52 | 2022-10-07 14:02:36 +0300 | [diff] [blame] | 172 | if (vcn == vcn0) { |
| 173 | /* Return the first fragment. */ |
| 174 | if (new_lcn) |
| 175 | *new_lcn = lcn; |
| 176 | if (new_len) |
| 177 | *new_len = flen; |
| 178 | } |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 179 | |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 180 | /* Add new fragment into run storage. */ |
Konstantin Komarov | c380b52 | 2022-10-07 14:02:36 +0300 | [diff] [blame] | 181 | if (!run_add_entry(run, vcn, lcn, flen, opt & ALLOCATE_MFT)) { |
Konstantin Komarov | d362446 | 2021-08-31 16:57:40 +0300 | [diff] [blame] | 182 | /* Undo last 'ntfs_look_for_free_space' */ |
Konstantin Komarov | 0e5b044 | 2022-07-13 18:00:03 +0300 | [diff] [blame] | 183 | mark_as_free_ex(sbi, lcn, len, false); |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 184 | err = -ENOMEM; |
| 185 | goto out; |
| 186 | } |
| 187 | |
Konstantin Komarov | c380b52 | 2022-10-07 14:02:36 +0300 | [diff] [blame] | 188 | if (opt & ALLOCATE_ZERO) { |
| 189 | u8 shift = sbi->cluster_bits - SECTOR_SHIFT; |
| 190 | |
| 191 | err = blkdev_issue_zeroout(sbi->sb->s_bdev, |
| 192 | (sector_t)lcn << shift, |
| 193 | (sector_t)flen << shift, |
| 194 | GFP_NOFS, 0); |
| 195 | if (err) |
| 196 | goto out; |
| 197 | } |
| 198 | |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 199 | vcn += flen; |
| 200 | |
Konstantin Komarov | c380b52 | 2022-10-07 14:02:36 +0300 | [diff] [blame] | 201 | if (flen >= len || (opt & ALLOCATE_MFT) || |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 202 | (fr && run->count - cnt >= fr)) { |
| 203 | *alen = vcn - vcn0; |
| 204 | return 0; |
| 205 | } |
| 206 | |
| 207 | len -= flen; |
| 208 | } |
| 209 | |
| 210 | out: |
Konstantin Komarov | 78ab59f | 2021-08-31 18:52:39 +0300 | [diff] [blame] | 211 | /* Undo 'ntfs_look_for_free_space' */ |
| 212 | if (vcn - vcn0) { |
| 213 | run_deallocate_ex(sbi, run, vcn0, vcn - vcn0, NULL, false); |
| 214 | run_truncate(run, vcn0); |
| 215 | } |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 216 | |
| 217 | return err; |
| 218 | } |
| 219 | |
| 220 | /* |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 221 | * attr_make_nonresident |
| 222 | * |
| 223 | * If page is not NULL - it is already contains resident data |
| 224 | * and locked (called from ni_write_frame()). |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 225 | */ |
| 226 | int attr_make_nonresident(struct ntfs_inode *ni, struct ATTRIB *attr, |
| 227 | struct ATTR_LIST_ENTRY *le, struct mft_inode *mi, |
| 228 | u64 new_size, struct runs_tree *run, |
| 229 | struct ATTRIB **ins_attr, struct page *page) |
| 230 | { |
| 231 | struct ntfs_sb_info *sbi; |
| 232 | struct ATTRIB *attr_s; |
| 233 | struct MFT_REC *rec; |
| 234 | u32 used, asize, rsize, aoff, align; |
| 235 | bool is_data; |
| 236 | CLST len, alen; |
| 237 | char *next; |
| 238 | int err; |
| 239 | |
| 240 | if (attr->non_res) { |
| 241 | *ins_attr = attr; |
| 242 | return 0; |
| 243 | } |
| 244 | |
| 245 | sbi = mi->sbi; |
| 246 | rec = mi->mrec; |
| 247 | attr_s = NULL; |
| 248 | used = le32_to_cpu(rec->used); |
| 249 | asize = le32_to_cpu(attr->size); |
| 250 | next = Add2Ptr(attr, asize); |
| 251 | aoff = PtrOffset(rec, attr); |
| 252 | rsize = le32_to_cpu(attr->res.data_size); |
| 253 | is_data = attr->type == ATTR_DATA && !attr->name_len; |
| 254 | |
| 255 | align = sbi->cluster_size; |
| 256 | if (is_attr_compressed(attr)) |
| 257 | align <<= COMPRESSION_UNIT; |
| 258 | len = (rsize + align - 1) >> sbi->cluster_bits; |
| 259 | |
| 260 | run_init(run); |
| 261 | |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 262 | /* Make a copy of original attribute. */ |
Kari Argillander | 195c52b | 2021-08-24 21:37:07 +0300 | [diff] [blame] | 263 | attr_s = kmemdup(attr, asize, GFP_NOFS); |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 264 | if (!attr_s) { |
| 265 | err = -ENOMEM; |
| 266 | goto out; |
| 267 | } |
| 268 | |
| 269 | if (!len) { |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 270 | /* Empty resident -> Empty nonresident. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 271 | alen = 0; |
| 272 | } else { |
| 273 | const char *data = resident_data(attr); |
| 274 | |
| 275 | err = attr_allocate_clusters(sbi, run, 0, 0, len, NULL, |
Konstantin Komarov | c380b52 | 2022-10-07 14:02:36 +0300 | [diff] [blame] | 276 | ALLOCATE_DEF, &alen, 0, NULL, |
| 277 | NULL); |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 278 | if (err) |
| 279 | goto out1; |
| 280 | |
| 281 | if (!rsize) { |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 282 | /* Empty resident -> Non empty nonresident. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 283 | } else if (!is_data) { |
Konstantin Komarov | 6354467 | 2021-09-09 13:15:20 +0300 | [diff] [blame] | 284 | err = ntfs_sb_write_run(sbi, run, 0, data, rsize, 0); |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 285 | if (err) |
| 286 | goto out2; |
| 287 | } else if (!page) { |
| 288 | char *kaddr; |
| 289 | |
| 290 | page = grab_cache_page(ni->vfs_inode.i_mapping, 0); |
| 291 | if (!page) { |
| 292 | err = -ENOMEM; |
| 293 | goto out2; |
| 294 | } |
| 295 | kaddr = kmap_atomic(page); |
| 296 | memcpy(kaddr, data, rsize); |
| 297 | memset(kaddr + rsize, 0, PAGE_SIZE - rsize); |
| 298 | kunmap_atomic(kaddr); |
| 299 | flush_dcache_page(page); |
| 300 | SetPageUptodate(page); |
| 301 | set_page_dirty(page); |
| 302 | unlock_page(page); |
| 303 | put_page(page); |
| 304 | } |
| 305 | } |
| 306 | |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 307 | /* Remove original attribute. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 308 | used -= asize; |
| 309 | memmove(attr, Add2Ptr(attr, asize), used - aoff); |
| 310 | rec->used = cpu_to_le32(used); |
| 311 | mi->dirty = true; |
| 312 | if (le) |
| 313 | al_remove_le(ni, le); |
| 314 | |
| 315 | err = ni_insert_nonresident(ni, attr_s->type, attr_name(attr_s), |
| 316 | attr_s->name_len, run, 0, alen, |
Konstantin Komarov | c1e0ab37 | 2022-05-13 18:25:04 +0300 | [diff] [blame] | 317 | attr_s->flags, &attr, NULL, NULL); |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 318 | if (err) |
| 319 | goto out3; |
| 320 | |
Kari Argillander | 195c52b | 2021-08-24 21:37:07 +0300 | [diff] [blame] | 321 | kfree(attr_s); |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 322 | attr->nres.data_size = cpu_to_le64(rsize); |
| 323 | attr->nres.valid_size = attr->nres.data_size; |
| 324 | |
| 325 | *ins_attr = attr; |
| 326 | |
| 327 | if (is_data) |
| 328 | ni->ni_flags &= ~NI_FLAG_RESIDENT; |
| 329 | |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 330 | /* Resident attribute becomes non resident. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 331 | return 0; |
| 332 | |
| 333 | out3: |
| 334 | attr = Add2Ptr(rec, aoff); |
| 335 | memmove(next, attr, used - aoff); |
| 336 | memcpy(attr, attr_s, asize); |
| 337 | rec->used = cpu_to_le32(used + asize); |
| 338 | mi->dirty = true; |
| 339 | out2: |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 340 | /* Undo: do not trim new allocated clusters. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 341 | run_deallocate(sbi, run, false); |
| 342 | run_close(run); |
| 343 | out1: |
Kari Argillander | 195c52b | 2021-08-24 21:37:07 +0300 | [diff] [blame] | 344 | kfree(attr_s); |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 345 | out: |
| 346 | return err; |
| 347 | } |
| 348 | |
| 349 | /* |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 350 | * attr_set_size_res - Helper for attr_set_size(). |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 351 | */ |
| 352 | static int attr_set_size_res(struct ntfs_inode *ni, struct ATTRIB *attr, |
| 353 | struct ATTR_LIST_ENTRY *le, struct mft_inode *mi, |
| 354 | u64 new_size, struct runs_tree *run, |
| 355 | struct ATTRIB **ins_attr) |
| 356 | { |
| 357 | struct ntfs_sb_info *sbi = mi->sbi; |
| 358 | struct MFT_REC *rec = mi->mrec; |
| 359 | u32 used = le32_to_cpu(rec->used); |
| 360 | u32 asize = le32_to_cpu(attr->size); |
| 361 | u32 aoff = PtrOffset(rec, attr); |
| 362 | u32 rsize = le32_to_cpu(attr->res.data_size); |
| 363 | u32 tail = used - aoff - asize; |
| 364 | char *next = Add2Ptr(attr, asize); |
Kari Argillander | fa3cacf | 2021-08-26 11:56:29 +0300 | [diff] [blame] | 365 | s64 dsize = ALIGN(new_size, 8) - ALIGN(rsize, 8); |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 366 | |
| 367 | if (dsize < 0) { |
| 368 | memmove(next + dsize, next, tail); |
| 369 | } else if (dsize > 0) { |
| 370 | if (used + dsize > sbi->max_bytes_per_attr) |
| 371 | return attr_make_nonresident(ni, attr, le, mi, new_size, |
| 372 | run, ins_attr, NULL); |
| 373 | |
| 374 | memmove(next + dsize, next, tail); |
| 375 | memset(next, 0, dsize); |
| 376 | } |
| 377 | |
| 378 | if (new_size > rsize) |
| 379 | memset(Add2Ptr(resident_data(attr), rsize), 0, |
| 380 | new_size - rsize); |
| 381 | |
| 382 | rec->used = cpu_to_le32(used + dsize); |
| 383 | attr->size = cpu_to_le32(asize + dsize); |
| 384 | attr->res.data_size = cpu_to_le32(new_size); |
| 385 | mi->dirty = true; |
| 386 | *ins_attr = attr; |
| 387 | |
| 388 | return 0; |
| 389 | } |
| 390 | |
| 391 | /* |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 392 | * attr_set_size - Change the size of attribute. |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 393 | * |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 394 | * Extend: |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 395 | * - Sparse/compressed: No allocated clusters. |
| 396 | * - Normal: Append allocated and preallocated new clusters. |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 397 | * Shrink: |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 398 | * - No deallocate if @keep_prealloc is set. |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 399 | */ |
| 400 | int attr_set_size(struct ntfs_inode *ni, enum ATTR_TYPE type, |
| 401 | const __le16 *name, u8 name_len, struct runs_tree *run, |
| 402 | u64 new_size, const u64 *new_valid, bool keep_prealloc, |
| 403 | struct ATTRIB **ret) |
| 404 | { |
| 405 | int err = 0; |
| 406 | struct ntfs_sb_info *sbi = ni->mi.sbi; |
| 407 | u8 cluster_bits = sbi->cluster_bits; |
Konstantin Komarov | 96de65a | 2023-01-17 15:01:00 +0400 | [diff] [blame] | 408 | bool is_mft = ni->mi.rno == MFT_REC_MFT && type == ATTR_DATA && |
| 409 | !name_len; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 410 | u64 old_valid, old_size, old_alloc, new_alloc, new_alloc_tmp; |
| 411 | struct ATTRIB *attr = NULL, *attr_b; |
| 412 | struct ATTR_LIST_ENTRY *le, *le_b; |
| 413 | struct mft_inode *mi, *mi_b; |
| 414 | CLST alen, vcn, lcn, new_alen, old_alen, svcn, evcn; |
| 415 | CLST next_svcn, pre_alloc = -1, done = 0; |
Konstantin Komarov | 0e5b044 | 2022-07-13 18:00:03 +0300 | [diff] [blame] | 416 | bool is_ext, is_bad = false; |
Konstantin Komarov | ad26a9c | 2022-10-07 20:08:06 +0300 | [diff] [blame] | 417 | bool dirty = false; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 418 | u32 align; |
| 419 | struct MFT_REC *rec; |
| 420 | |
| 421 | again: |
Konstantin Komarov | 0e5b044 | 2022-07-13 18:00:03 +0300 | [diff] [blame] | 422 | alen = 0; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 423 | le_b = NULL; |
| 424 | attr_b = ni_find_attr(ni, NULL, &le_b, type, name, name_len, NULL, |
| 425 | &mi_b); |
| 426 | if (!attr_b) { |
| 427 | err = -ENOENT; |
Konstantin Komarov | 0e5b044 | 2022-07-13 18:00:03 +0300 | [diff] [blame] | 428 | goto bad_inode; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 429 | } |
| 430 | |
| 431 | if (!attr_b->non_res) { |
| 432 | err = attr_set_size_res(ni, attr_b, le_b, mi_b, new_size, run, |
| 433 | &attr_b); |
Konstantin Komarov | 0e5b044 | 2022-07-13 18:00:03 +0300 | [diff] [blame] | 434 | if (err) |
| 435 | return err; |
| 436 | |
| 437 | /* Return if file is still resident. */ |
Konstantin Komarov | ad26a9c | 2022-10-07 20:08:06 +0300 | [diff] [blame] | 438 | if (!attr_b->non_res) { |
| 439 | dirty = true; |
Konstantin Komarov | 0e5b044 | 2022-07-13 18:00:03 +0300 | [diff] [blame] | 440 | goto ok1; |
Konstantin Komarov | ad26a9c | 2022-10-07 20:08:06 +0300 | [diff] [blame] | 441 | } |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 442 | |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 443 | /* Layout of records may be changed, so do a full search. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 444 | goto again; |
| 445 | } |
| 446 | |
| 447 | is_ext = is_attr_ext(attr_b); |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 448 | align = sbi->cluster_size; |
Konstantin Komarov | ce46ae0 | 2021-10-01 18:48:49 +0300 | [diff] [blame] | 449 | if (is_ext) |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 450 | align <<= attr_b->nres.c_unit; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 451 | |
| 452 | old_valid = le64_to_cpu(attr_b->nres.valid_size); |
| 453 | old_size = le64_to_cpu(attr_b->nres.data_size); |
| 454 | old_alloc = le64_to_cpu(attr_b->nres.alloc_size); |
Konstantin Komarov | 0e5b044 | 2022-07-13 18:00:03 +0300 | [diff] [blame] | 455 | |
| 456 | again_1: |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 457 | old_alen = old_alloc >> cluster_bits; |
| 458 | |
| 459 | new_alloc = (new_size + align - 1) & ~(u64)(align - 1); |
| 460 | new_alen = new_alloc >> cluster_bits; |
| 461 | |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 462 | if (keep_prealloc && new_size < old_size) { |
| 463 | attr_b->nres.data_size = cpu_to_le64(new_size); |
Konstantin Komarov | ad26a9c | 2022-10-07 20:08:06 +0300 | [diff] [blame] | 464 | mi_b->dirty = dirty = true; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 465 | goto ok; |
| 466 | } |
| 467 | |
| 468 | vcn = old_alen - 1; |
| 469 | |
| 470 | svcn = le64_to_cpu(attr_b->nres.svcn); |
| 471 | evcn = le64_to_cpu(attr_b->nres.evcn); |
| 472 | |
| 473 | if (svcn <= vcn && vcn <= evcn) { |
| 474 | attr = attr_b; |
| 475 | le = le_b; |
| 476 | mi = mi_b; |
| 477 | } else if (!le_b) { |
| 478 | err = -EINVAL; |
Konstantin Komarov | 0e5b044 | 2022-07-13 18:00:03 +0300 | [diff] [blame] | 479 | goto bad_inode; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 480 | } else { |
| 481 | le = le_b; |
| 482 | attr = ni_find_attr(ni, attr_b, &le, type, name, name_len, &vcn, |
| 483 | &mi); |
| 484 | if (!attr) { |
| 485 | err = -EINVAL; |
Konstantin Komarov | 0e5b044 | 2022-07-13 18:00:03 +0300 | [diff] [blame] | 486 | goto bad_inode; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 487 | } |
| 488 | |
| 489 | next_le_1: |
| 490 | svcn = le64_to_cpu(attr->nres.svcn); |
| 491 | evcn = le64_to_cpu(attr->nres.evcn); |
| 492 | } |
Konstantin Komarov | 0e5b044 | 2022-07-13 18:00:03 +0300 | [diff] [blame] | 493 | /* |
| 494 | * Here we have: |
| 495 | * attr,mi,le - last attribute segment (containing 'vcn'). |
| 496 | * attr_b,mi_b,le_b - base (primary) attribute segment. |
| 497 | */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 498 | next_le: |
| 499 | rec = mi->mrec; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 500 | err = attr_load_runs(attr, ni, run, NULL); |
| 501 | if (err) |
| 502 | goto out; |
| 503 | |
| 504 | if (new_size > old_size) { |
| 505 | CLST to_allocate; |
| 506 | size_t free; |
| 507 | |
| 508 | if (new_alloc <= old_alloc) { |
| 509 | attr_b->nres.data_size = cpu_to_le64(new_size); |
Konstantin Komarov | ad26a9c | 2022-10-07 20:08:06 +0300 | [diff] [blame] | 510 | mi_b->dirty = dirty = true; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 511 | goto ok; |
| 512 | } |
| 513 | |
Konstantin Komarov | 0e5b044 | 2022-07-13 18:00:03 +0300 | [diff] [blame] | 514 | /* |
| 515 | * Add clusters. In simple case we have to: |
| 516 | * - allocate space (vcn, lcn, len) |
| 517 | * - update packed run in 'mi' |
| 518 | * - update attr->nres.evcn |
| 519 | * - update attr_b->nres.data_size/attr_b->nres.alloc_size |
| 520 | */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 521 | to_allocate = new_alen - old_alen; |
| 522 | add_alloc_in_same_attr_seg: |
| 523 | lcn = 0; |
| 524 | if (is_mft) { |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 525 | /* MFT allocates clusters from MFT zone. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 526 | pre_alloc = 0; |
| 527 | } else if (is_ext) { |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 528 | /* No preallocate for sparse/compress. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 529 | pre_alloc = 0; |
| 530 | } else if (pre_alloc == -1) { |
| 531 | pre_alloc = 0; |
| 532 | if (type == ATTR_DATA && !name_len && |
Kari Argillander | 564c97b | 2021-09-07 18:35:51 +0300 | [diff] [blame] | 533 | sbi->options->prealloc) { |
Konstantin Komarov | 96de65a | 2023-01-17 15:01:00 +0400 | [diff] [blame] | 534 | pre_alloc = bytes_to_cluster( |
| 535 | sbi, get_pre_allocated( |
| 536 | new_size)) - |
| 537 | new_alen; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 538 | } |
| 539 | |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 540 | /* Get the last LCN to allocate from. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 541 | if (old_alen && |
| 542 | !run_lookup_entry(run, vcn, &lcn, NULL, NULL)) { |
| 543 | lcn = SPARSE_LCN; |
| 544 | } |
| 545 | |
| 546 | if (lcn == SPARSE_LCN) |
| 547 | lcn = 0; |
| 548 | else if (lcn) |
| 549 | lcn += 1; |
| 550 | |
| 551 | free = wnd_zeroes(&sbi->used.bitmap); |
| 552 | if (to_allocate > free) { |
| 553 | err = -ENOSPC; |
| 554 | goto out; |
| 555 | } |
| 556 | |
| 557 | if (pre_alloc && to_allocate + pre_alloc > free) |
| 558 | pre_alloc = 0; |
| 559 | } |
| 560 | |
| 561 | vcn = old_alen; |
| 562 | |
| 563 | if (is_ext) { |
| 564 | if (!run_add_entry(run, vcn, SPARSE_LCN, to_allocate, |
| 565 | false)) { |
| 566 | err = -ENOMEM; |
| 567 | goto out; |
| 568 | } |
| 569 | alen = to_allocate; |
| 570 | } else { |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 571 | /* ~3 bytes per fragment. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 572 | err = attr_allocate_clusters( |
| 573 | sbi, run, vcn, lcn, to_allocate, &pre_alloc, |
Konstantin Komarov | c380b52 | 2022-10-07 14:02:36 +0300 | [diff] [blame] | 574 | is_mft ? ALLOCATE_MFT : ALLOCATE_DEF, &alen, |
Konstantin Komarov | 96de65a | 2023-01-17 15:01:00 +0400 | [diff] [blame] | 575 | is_mft ? 0 : |
Konstantin Komarov | f037776 | 2023-05-08 12:22:05 +0400 | [diff] [blame] | 576 | (sbi->record_size - |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 577 | le32_to_cpu(rec->used) + 8) / |
| 578 | 3 + |
| 579 | 1, |
Konstantin Komarov | c380b52 | 2022-10-07 14:02:36 +0300 | [diff] [blame] | 580 | NULL, NULL); |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 581 | if (err) |
| 582 | goto out; |
| 583 | } |
| 584 | |
| 585 | done += alen; |
| 586 | vcn += alen; |
| 587 | if (to_allocate > alen) |
| 588 | to_allocate -= alen; |
| 589 | else |
| 590 | to_allocate = 0; |
| 591 | |
| 592 | pack_runs: |
| 593 | err = mi_pack_runs(mi, attr, run, vcn - svcn); |
| 594 | if (err) |
Konstantin Komarov | 0e5b044 | 2022-07-13 18:00:03 +0300 | [diff] [blame] | 595 | goto undo_1; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 596 | |
| 597 | next_svcn = le64_to_cpu(attr->nres.evcn) + 1; |
| 598 | new_alloc_tmp = (u64)next_svcn << cluster_bits; |
| 599 | attr_b->nres.alloc_size = cpu_to_le64(new_alloc_tmp); |
Konstantin Komarov | ad26a9c | 2022-10-07 20:08:06 +0300 | [diff] [blame] | 600 | mi_b->dirty = dirty = true; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 601 | |
| 602 | if (next_svcn >= vcn && !to_allocate) { |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 603 | /* Normal way. Update attribute and exit. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 604 | attr_b->nres.data_size = cpu_to_le64(new_size); |
| 605 | goto ok; |
| 606 | } |
| 607 | |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 608 | /* At least two MFT to avoid recursive loop. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 609 | if (is_mft && next_svcn == vcn && |
| 610 | ((u64)done << sbi->cluster_bits) >= 2 * sbi->record_size) { |
| 611 | new_size = new_alloc_tmp; |
| 612 | attr_b->nres.data_size = attr_b->nres.alloc_size; |
| 613 | goto ok; |
| 614 | } |
| 615 | |
| 616 | if (le32_to_cpu(rec->used) < sbi->record_size) { |
| 617 | old_alen = next_svcn; |
| 618 | evcn = old_alen - 1; |
| 619 | goto add_alloc_in_same_attr_seg; |
| 620 | } |
| 621 | |
| 622 | attr_b->nres.data_size = attr_b->nres.alloc_size; |
| 623 | if (new_alloc_tmp < old_valid) |
| 624 | attr_b->nres.valid_size = attr_b->nres.data_size; |
| 625 | |
| 626 | if (type == ATTR_LIST) { |
| 627 | err = ni_expand_list(ni); |
| 628 | if (err) |
Konstantin Komarov | 0e5b044 | 2022-07-13 18:00:03 +0300 | [diff] [blame] | 629 | goto undo_2; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 630 | if (next_svcn < vcn) |
| 631 | goto pack_runs; |
| 632 | |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 633 | /* Layout of records is changed. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 634 | goto again; |
| 635 | } |
| 636 | |
| 637 | if (!ni->attr_list.size) { |
| 638 | err = ni_create_attr_list(ni); |
Konstantin Komarov | 0e5b044 | 2022-07-13 18:00:03 +0300 | [diff] [blame] | 639 | /* In case of error layout of records is not changed. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 640 | if (err) |
Konstantin Komarov | 0e5b044 | 2022-07-13 18:00:03 +0300 | [diff] [blame] | 641 | goto undo_2; |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 642 | /* Layout of records is changed. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 643 | } |
| 644 | |
| 645 | if (next_svcn >= vcn) { |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 646 | /* This is MFT data, repeat. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 647 | goto again; |
| 648 | } |
| 649 | |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 650 | /* Insert new attribute segment. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 651 | err = ni_insert_nonresident(ni, type, name, name_len, run, |
| 652 | next_svcn, vcn - next_svcn, |
Konstantin Komarov | c1e0ab37 | 2022-05-13 18:25:04 +0300 | [diff] [blame] | 653 | attr_b->flags, &attr, &mi, NULL); |
Konstantin Komarov | 0e5b044 | 2022-07-13 18:00:03 +0300 | [diff] [blame] | 654 | |
| 655 | /* |
| 656 | * Layout of records maybe changed. |
| 657 | * Find base attribute to update. |
| 658 | */ |
| 659 | le_b = NULL; |
| 660 | attr_b = ni_find_attr(ni, NULL, &le_b, type, name, name_len, |
| 661 | NULL, &mi_b); |
| 662 | if (!attr_b) { |
| 663 | err = -EINVAL; |
| 664 | goto bad_inode; |
| 665 | } |
| 666 | |
| 667 | if (err) { |
| 668 | /* ni_insert_nonresident failed. */ |
| 669 | attr = NULL; |
| 670 | goto undo_2; |
| 671 | } |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 672 | |
| 673 | if (!is_mft) |
| 674 | run_truncate_head(run, evcn + 1); |
| 675 | |
| 676 | svcn = le64_to_cpu(attr->nres.svcn); |
| 677 | evcn = le64_to_cpu(attr->nres.evcn); |
| 678 | |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 679 | /* |
Konstantin Komarov | 0e5b044 | 2022-07-13 18:00:03 +0300 | [diff] [blame] | 680 | * Attribute is in consistency state. |
| 681 | * Save this point to restore to if next steps fail. |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 682 | */ |
Konstantin Komarov | 0e5b044 | 2022-07-13 18:00:03 +0300 | [diff] [blame] | 683 | old_valid = old_size = old_alloc = (u64)vcn << cluster_bits; |
| 684 | attr_b->nres.valid_size = attr_b->nres.data_size = |
| 685 | attr_b->nres.alloc_size = cpu_to_le64(old_size); |
Konstantin Komarov | ad26a9c | 2022-10-07 20:08:06 +0300 | [diff] [blame] | 686 | mi_b->dirty = dirty = true; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 687 | goto again_1; |
| 688 | } |
| 689 | |
| 690 | if (new_size != old_size || |
| 691 | (new_alloc != old_alloc && !keep_prealloc)) { |
Konstantin Komarov | 0e5b044 | 2022-07-13 18:00:03 +0300 | [diff] [blame] | 692 | /* |
| 693 | * Truncate clusters. In simple case we have to: |
| 694 | * - update packed run in 'mi' |
| 695 | * - update attr->nres.evcn |
| 696 | * - update attr_b->nres.data_size/attr_b->nres.alloc_size |
| 697 | * - mark and trim clusters as free (vcn, lcn, len) |
| 698 | */ |
| 699 | CLST dlen = 0; |
| 700 | |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 701 | vcn = max(svcn, new_alen); |
| 702 | new_alloc_tmp = (u64)vcn << cluster_bits; |
| 703 | |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 704 | if (vcn > svcn) { |
| 705 | err = mi_pack_runs(mi, attr, run, vcn - svcn); |
| 706 | if (err) |
| 707 | goto out; |
| 708 | } else if (le && le->vcn) { |
| 709 | u16 le_sz = le16_to_cpu(le->size); |
| 710 | |
| 711 | /* |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 712 | * NOTE: List entries for one attribute are always |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 713 | * the same size. We deal with last entry (vcn==0) |
| 714 | * and it is not first in entries array |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 715 | * (list entry for std attribute always first). |
| 716 | * So it is safe to step back. |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 717 | */ |
Konstantin Komarov | 78ab59f | 2021-08-31 18:52:39 +0300 | [diff] [blame] | 718 | mi_remove_attr(NULL, mi, attr); |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 719 | |
| 720 | if (!al_remove_le(ni, le)) { |
| 721 | err = -EINVAL; |
Konstantin Komarov | 0e5b044 | 2022-07-13 18:00:03 +0300 | [diff] [blame] | 722 | goto bad_inode; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 723 | } |
| 724 | |
| 725 | le = (struct ATTR_LIST_ENTRY *)((u8 *)le - le_sz); |
| 726 | } else { |
| 727 | attr->nres.evcn = cpu_to_le64((u64)vcn - 1); |
| 728 | mi->dirty = true; |
| 729 | } |
| 730 | |
| 731 | attr_b->nres.alloc_size = cpu_to_le64(new_alloc_tmp); |
| 732 | |
| 733 | if (vcn == new_alen) { |
| 734 | attr_b->nres.data_size = cpu_to_le64(new_size); |
| 735 | if (new_size < old_valid) |
| 736 | attr_b->nres.valid_size = |
| 737 | attr_b->nres.data_size; |
| 738 | } else { |
| 739 | if (new_alloc_tmp <= |
| 740 | le64_to_cpu(attr_b->nres.data_size)) |
| 741 | attr_b->nres.data_size = |
| 742 | attr_b->nres.alloc_size; |
| 743 | if (new_alloc_tmp < |
| 744 | le64_to_cpu(attr_b->nres.valid_size)) |
| 745 | attr_b->nres.valid_size = |
| 746 | attr_b->nres.alloc_size; |
| 747 | } |
Konstantin Komarov | ad26a9c | 2022-10-07 20:08:06 +0300 | [diff] [blame] | 748 | mi_b->dirty = dirty = true; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 749 | |
Konstantin Komarov | 0e5b044 | 2022-07-13 18:00:03 +0300 | [diff] [blame] | 750 | err = run_deallocate_ex(sbi, run, vcn, evcn - vcn + 1, &dlen, |
| 751 | true); |
| 752 | if (err) |
| 753 | goto out; |
| 754 | |
| 755 | if (is_ext) { |
| 756 | /* dlen - really deallocated clusters. */ |
| 757 | le64_sub_cpu(&attr_b->nres.total_size, |
| 758 | ((u64)dlen << cluster_bits)); |
| 759 | } |
| 760 | |
| 761 | run_truncate(run, vcn); |
| 762 | |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 763 | if (new_alloc_tmp <= new_alloc) |
| 764 | goto ok; |
| 765 | |
| 766 | old_size = new_alloc_tmp; |
| 767 | vcn = svcn - 1; |
| 768 | |
| 769 | if (le == le_b) { |
| 770 | attr = attr_b; |
| 771 | mi = mi_b; |
| 772 | evcn = svcn - 1; |
| 773 | svcn = 0; |
| 774 | goto next_le; |
| 775 | } |
| 776 | |
| 777 | if (le->type != type || le->name_len != name_len || |
| 778 | memcmp(le_name(le), name, name_len * sizeof(short))) { |
| 779 | err = -EINVAL; |
Konstantin Komarov | 0e5b044 | 2022-07-13 18:00:03 +0300 | [diff] [blame] | 780 | goto bad_inode; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 781 | } |
| 782 | |
| 783 | err = ni_load_mi(ni, le, &mi); |
| 784 | if (err) |
| 785 | goto out; |
| 786 | |
| 787 | attr = mi_find_attr(mi, NULL, type, name, name_len, &le->id); |
| 788 | if (!attr) { |
| 789 | err = -EINVAL; |
Konstantin Komarov | 0e5b044 | 2022-07-13 18:00:03 +0300 | [diff] [blame] | 790 | goto bad_inode; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 791 | } |
| 792 | goto next_le_1; |
| 793 | } |
| 794 | |
| 795 | ok: |
| 796 | if (new_valid) { |
| 797 | __le64 valid = cpu_to_le64(min(*new_valid, new_size)); |
| 798 | |
| 799 | if (attr_b->nres.valid_size != valid) { |
| 800 | attr_b->nres.valid_size = valid; |
| 801 | mi_b->dirty = true; |
| 802 | } |
| 803 | } |
| 804 | |
Konstantin Komarov | 0e5b044 | 2022-07-13 18:00:03 +0300 | [diff] [blame] | 805 | ok1: |
| 806 | if (ret) |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 807 | *ret = attr_b; |
| 808 | |
Konstantin Komarov | 0e5b044 | 2022-07-13 18:00:03 +0300 | [diff] [blame] | 809 | if (((type == ATTR_DATA && !name_len) || |
| 810 | (type == ATTR_ALLOC && name == I30_NAME))) { |
Konstantin Komarov | ad26a9c | 2022-10-07 20:08:06 +0300 | [diff] [blame] | 811 | /* Update inode_set_bytes. */ |
Konstantin Komarov | 0e5b044 | 2022-07-13 18:00:03 +0300 | [diff] [blame] | 812 | if (attr_b->non_res) { |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 813 | new_alloc = le64_to_cpu(attr_b->nres.alloc_size); |
| 814 | if (inode_get_bytes(&ni->vfs_inode) != new_alloc) { |
| 815 | inode_set_bytes(&ni->vfs_inode, new_alloc); |
| 816 | dirty = true; |
| 817 | } |
| 818 | } |
| 819 | |
Konstantin Komarov | ad26a9c | 2022-10-07 20:08:06 +0300 | [diff] [blame] | 820 | /* Don't forget to update duplicate information in parent. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 821 | if (dirty) { |
| 822 | ni->ni_flags |= NI_FLAG_UPDATE_PARENT; |
| 823 | mark_inode_dirty(&ni->vfs_inode); |
| 824 | } |
| 825 | } |
| 826 | |
Konstantin Komarov | 0e5b044 | 2022-07-13 18:00:03 +0300 | [diff] [blame] | 827 | return 0; |
| 828 | |
| 829 | undo_2: |
| 830 | vcn -= alen; |
| 831 | attr_b->nres.data_size = cpu_to_le64(old_size); |
| 832 | attr_b->nres.valid_size = cpu_to_le64(old_valid); |
| 833 | attr_b->nres.alloc_size = cpu_to_le64(old_alloc); |
| 834 | |
| 835 | /* Restore 'attr' and 'mi'. */ |
| 836 | if (attr) |
| 837 | goto restore_run; |
| 838 | |
| 839 | if (le64_to_cpu(attr_b->nres.svcn) <= svcn && |
| 840 | svcn <= le64_to_cpu(attr_b->nres.evcn)) { |
| 841 | attr = attr_b; |
| 842 | le = le_b; |
| 843 | mi = mi_b; |
| 844 | } else if (!le_b) { |
| 845 | err = -EINVAL; |
| 846 | goto bad_inode; |
| 847 | } else { |
| 848 | le = le_b; |
| 849 | attr = ni_find_attr(ni, attr_b, &le, type, name, name_len, |
| 850 | &svcn, &mi); |
| 851 | if (!attr) |
| 852 | goto bad_inode; |
| 853 | } |
| 854 | |
| 855 | restore_run: |
| 856 | if (mi_pack_runs(mi, attr, run, evcn - svcn + 1)) |
| 857 | is_bad = true; |
| 858 | |
| 859 | undo_1: |
| 860 | run_deallocate_ex(sbi, run, vcn, alen, NULL, false); |
| 861 | |
| 862 | run_truncate(run, vcn); |
| 863 | out: |
| 864 | if (is_bad) { |
| 865 | bad_inode: |
| 866 | _ntfs_bad_inode(&ni->vfs_inode); |
| 867 | } |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 868 | return err; |
| 869 | } |
| 870 | |
Konstantin Komarov | c380b52 | 2022-10-07 14:02:36 +0300 | [diff] [blame] | 871 | /* |
| 872 | * attr_data_get_block - Returns 'lcn' and 'len' for given 'vcn'. |
| 873 | * |
| 874 | * @new == NULL means just to get current mapping for 'vcn' |
| 875 | * @new != NULL means allocate real cluster if 'vcn' maps to hole |
| 876 | * @zero - zeroout new allocated clusters |
| 877 | * |
| 878 | * NOTE: |
| 879 | * - @new != NULL is called only for sparsed or compressed attributes. |
| 880 | * - new allocated clusters are zeroed via blkdev_issue_zeroout. |
| 881 | */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 882 | int attr_data_get_block(struct ntfs_inode *ni, CLST vcn, CLST clen, CLST *lcn, |
Konstantin Komarov | c380b52 | 2022-10-07 14:02:36 +0300 | [diff] [blame] | 883 | CLST *len, bool *new, bool zero) |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 884 | { |
| 885 | int err = 0; |
| 886 | struct runs_tree *run = &ni->file.run; |
| 887 | struct ntfs_sb_info *sbi; |
| 888 | u8 cluster_bits; |
| 889 | struct ATTRIB *attr = NULL, *attr_b; |
| 890 | struct ATTR_LIST_ENTRY *le, *le_b; |
| 891 | struct mft_inode *mi, *mi_b; |
Konstantin Komarov | c380b52 | 2022-10-07 14:02:36 +0300 | [diff] [blame] | 892 | CLST hint, svcn, to_alloc, evcn1, next_svcn, asize, end, vcn0, alen; |
Konstantin Komarov | 910013f | 2022-10-07 20:20:14 +0300 | [diff] [blame] | 893 | CLST alloc, evcn; |
Konstantin Komarov | c380b52 | 2022-10-07 14:02:36 +0300 | [diff] [blame] | 894 | unsigned fr; |
Konstantin Komarov | 910013f | 2022-10-07 20:20:14 +0300 | [diff] [blame] | 895 | u64 total_size, total_size0; |
| 896 | int step = 0; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 897 | |
| 898 | if (new) |
| 899 | *new = false; |
| 900 | |
Konstantin Komarov | c380b52 | 2022-10-07 14:02:36 +0300 | [diff] [blame] | 901 | /* Try to find in cache. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 902 | down_read(&ni->file.run_lock); |
Konstantin Komarov | c380b52 | 2022-10-07 14:02:36 +0300 | [diff] [blame] | 903 | if (!run_lookup_entry(run, vcn, lcn, len, NULL)) |
| 904 | *len = 0; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 905 | up_read(&ni->file.run_lock); |
| 906 | |
Konstantin Komarov | c380b52 | 2022-10-07 14:02:36 +0300 | [diff] [blame] | 907 | if (*len) { |
| 908 | if (*lcn != SPARSE_LCN || !new) |
| 909 | return 0; /* Fast normal way without allocation. */ |
| 910 | else if (clen > *len) |
| 911 | clen = *len; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 912 | } |
| 913 | |
Konstantin Komarov | c380b52 | 2022-10-07 14:02:36 +0300 | [diff] [blame] | 914 | /* No cluster in cache or we need to allocate cluster in hole. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 915 | sbi = ni->mi.sbi; |
| 916 | cluster_bits = sbi->cluster_bits; |
| 917 | |
| 918 | ni_lock(ni); |
| 919 | down_write(&ni->file.run_lock); |
| 920 | |
| 921 | le_b = NULL; |
| 922 | attr_b = ni_find_attr(ni, NULL, &le_b, ATTR_DATA, NULL, 0, NULL, &mi_b); |
| 923 | if (!attr_b) { |
| 924 | err = -ENOENT; |
| 925 | goto out; |
| 926 | } |
| 927 | |
| 928 | if (!attr_b->non_res) { |
| 929 | *lcn = RESIDENT_LCN; |
| 930 | *len = 1; |
| 931 | goto out; |
| 932 | } |
| 933 | |
Konstantin Komarov | c1e0ab37 | 2022-05-13 18:25:04 +0300 | [diff] [blame] | 934 | asize = le64_to_cpu(attr_b->nres.alloc_size) >> cluster_bits; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 935 | if (vcn >= asize) { |
Konstantin Komarov | 910013f | 2022-10-07 20:20:14 +0300 | [diff] [blame] | 936 | if (new) { |
| 937 | err = -EINVAL; |
| 938 | } else { |
| 939 | *len = 1; |
| 940 | *lcn = SPARSE_LCN; |
| 941 | } |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 942 | goto out; |
| 943 | } |
| 944 | |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 945 | svcn = le64_to_cpu(attr_b->nres.svcn); |
| 946 | evcn1 = le64_to_cpu(attr_b->nres.evcn) + 1; |
| 947 | |
| 948 | attr = attr_b; |
| 949 | le = le_b; |
| 950 | mi = mi_b; |
| 951 | |
| 952 | if (le_b && (vcn < svcn || evcn1 <= vcn)) { |
| 953 | attr = ni_find_attr(ni, attr_b, &le, ATTR_DATA, NULL, 0, &vcn, |
| 954 | &mi); |
| 955 | if (!attr) { |
| 956 | err = -EINVAL; |
| 957 | goto out; |
| 958 | } |
| 959 | svcn = le64_to_cpu(attr->nres.svcn); |
| 960 | evcn1 = le64_to_cpu(attr->nres.evcn) + 1; |
| 961 | } |
| 962 | |
Konstantin Komarov | c380b52 | 2022-10-07 14:02:36 +0300 | [diff] [blame] | 963 | /* Load in cache actual information. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 964 | err = attr_load_runs(attr, ni, run, NULL); |
| 965 | if (err) |
| 966 | goto out; |
| 967 | |
Konstantin Komarov | c380b52 | 2022-10-07 14:02:36 +0300 | [diff] [blame] | 968 | if (!*len) { |
| 969 | if (run_lookup_entry(run, vcn, lcn, len, NULL)) { |
| 970 | if (*lcn != SPARSE_LCN || !new) |
| 971 | goto ok; /* Slow normal way without allocation. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 972 | |
Konstantin Komarov | c380b52 | 2022-10-07 14:02:36 +0300 | [diff] [blame] | 973 | if (clen > *len) |
| 974 | clen = *len; |
| 975 | } else if (!new) { |
| 976 | /* Here we may return -ENOENT. |
| 977 | * In any case caller gets zero length. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 978 | goto ok; |
| 979 | } |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 980 | } |
| 981 | |
| 982 | if (!is_attr_ext(attr_b)) { |
Konstantin Komarov | c380b52 | 2022-10-07 14:02:36 +0300 | [diff] [blame] | 983 | /* The code below only for sparsed or compressed attributes. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 984 | err = -EINVAL; |
| 985 | goto out; |
| 986 | } |
| 987 | |
Konstantin Komarov | c380b52 | 2022-10-07 14:02:36 +0300 | [diff] [blame] | 988 | vcn0 = vcn; |
| 989 | to_alloc = clen; |
| 990 | fr = (sbi->record_size - le32_to_cpu(mi->mrec->used) + 8) / 3 + 1; |
| 991 | /* Allocate frame aligned clusters. |
| 992 | * ntfs.sys usually uses 16 clusters per frame for sparsed or compressed. |
| 993 | * ntfs3 uses 1 cluster per frame for new created sparsed files. */ |
| 994 | if (attr_b->nres.c_unit) { |
| 995 | CLST clst_per_frame = 1u << attr_b->nres.c_unit; |
| 996 | CLST cmask = ~(clst_per_frame - 1); |
| 997 | |
| 998 | /* Get frame aligned vcn and to_alloc. */ |
| 999 | vcn = vcn0 & cmask; |
| 1000 | to_alloc = ((vcn0 + clen + clst_per_frame - 1) & cmask) - vcn; |
| 1001 | if (fr < clst_per_frame) |
| 1002 | fr = clst_per_frame; |
| 1003 | zero = true; |
| 1004 | |
| 1005 | /* Check if 'vcn' and 'vcn0' in different attribute segments. */ |
| 1006 | if (vcn < svcn || evcn1 <= vcn) { |
| 1007 | /* Load attribute for truncated vcn. */ |
| 1008 | attr = ni_find_attr(ni, attr_b, &le, ATTR_DATA, NULL, 0, |
| 1009 | &vcn, &mi); |
| 1010 | if (!attr) { |
| 1011 | err = -EINVAL; |
| 1012 | goto out; |
| 1013 | } |
| 1014 | svcn = le64_to_cpu(attr->nres.svcn); |
| 1015 | evcn1 = le64_to_cpu(attr->nres.evcn) + 1; |
| 1016 | err = attr_load_runs(attr, ni, run, NULL); |
| 1017 | if (err) |
| 1018 | goto out; |
| 1019 | } |
| 1020 | } |
| 1021 | |
| 1022 | if (vcn + to_alloc > asize) |
| 1023 | to_alloc = asize - vcn; |
| 1024 | |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1025 | /* Get the last LCN to allocate from. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1026 | hint = 0; |
| 1027 | |
| 1028 | if (vcn > evcn1) { |
| 1029 | if (!run_add_entry(run, evcn1, SPARSE_LCN, vcn - evcn1, |
| 1030 | false)) { |
| 1031 | err = -ENOMEM; |
| 1032 | goto out; |
| 1033 | } |
| 1034 | } else if (vcn && !run_lookup_entry(run, vcn - 1, &hint, NULL, NULL)) { |
| 1035 | hint = -1; |
| 1036 | } |
| 1037 | |
Konstantin Komarov | c380b52 | 2022-10-07 14:02:36 +0300 | [diff] [blame] | 1038 | /* Allocate and zeroout new clusters. */ |
| 1039 | err = attr_allocate_clusters(sbi, run, vcn, hint + 1, to_alloc, NULL, |
| 1040 | zero ? ALLOCATE_ZERO : ALLOCATE_DEF, &alen, |
| 1041 | fr, lcn, len); |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1042 | if (err) |
| 1043 | goto out; |
| 1044 | *new = true; |
Konstantin Komarov | 910013f | 2022-10-07 20:20:14 +0300 | [diff] [blame] | 1045 | step = 1; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1046 | |
Konstantin Komarov | c380b52 | 2022-10-07 14:02:36 +0300 | [diff] [blame] | 1047 | end = vcn + alen; |
Konstantin Komarov | 910013f | 2022-10-07 20:20:14 +0300 | [diff] [blame] | 1048 | /* Save 'total_size0' to restore if error. */ |
| 1049 | total_size0 = le64_to_cpu(attr_b->nres.total_size); |
| 1050 | total_size = total_size0 + ((u64)alen << cluster_bits); |
Konstantin Komarov | c380b52 | 2022-10-07 14:02:36 +0300 | [diff] [blame] | 1051 | |
| 1052 | if (vcn != vcn0) { |
| 1053 | if (!run_lookup_entry(run, vcn0, lcn, len, NULL)) { |
| 1054 | err = -EINVAL; |
| 1055 | goto out; |
| 1056 | } |
| 1057 | if (*lcn == SPARSE_LCN) { |
| 1058 | /* Internal error. Should not happened. */ |
| 1059 | WARN_ON(1); |
| 1060 | err = -EINVAL; |
| 1061 | goto out; |
| 1062 | } |
| 1063 | /* Check case when vcn0 + len overlaps new allocated clusters. */ |
| 1064 | if (vcn0 + *len > end) |
| 1065 | *len = end - vcn0; |
| 1066 | } |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1067 | |
| 1068 | repack: |
| 1069 | err = mi_pack_runs(mi, attr, run, max(end, evcn1) - svcn); |
| 1070 | if (err) |
| 1071 | goto out; |
| 1072 | |
| 1073 | attr_b->nres.total_size = cpu_to_le64(total_size); |
| 1074 | inode_set_bytes(&ni->vfs_inode, total_size); |
| 1075 | ni->ni_flags |= NI_FLAG_UPDATE_PARENT; |
| 1076 | |
| 1077 | mi_b->dirty = true; |
| 1078 | mark_inode_dirty(&ni->vfs_inode); |
| 1079 | |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1080 | /* Stored [vcn : next_svcn) from [vcn : end). */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1081 | next_svcn = le64_to_cpu(attr->nres.evcn) + 1; |
| 1082 | |
| 1083 | if (end <= evcn1) { |
| 1084 | if (next_svcn == evcn1) { |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1085 | /* Normal way. Update attribute and exit. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1086 | goto ok; |
| 1087 | } |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1088 | /* Add new segment [next_svcn : evcn1 - next_svcn). */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1089 | if (!ni->attr_list.size) { |
| 1090 | err = ni_create_attr_list(ni); |
| 1091 | if (err) |
Konstantin Komarov | 910013f | 2022-10-07 20:20:14 +0300 | [diff] [blame] | 1092 | goto undo1; |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1093 | /* Layout of records is changed. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1094 | le_b = NULL; |
| 1095 | attr_b = ni_find_attr(ni, NULL, &le_b, ATTR_DATA, NULL, |
| 1096 | 0, NULL, &mi_b); |
| 1097 | if (!attr_b) { |
| 1098 | err = -ENOENT; |
| 1099 | goto out; |
| 1100 | } |
| 1101 | |
| 1102 | attr = attr_b; |
| 1103 | le = le_b; |
| 1104 | mi = mi_b; |
| 1105 | goto repack; |
| 1106 | } |
| 1107 | } |
| 1108 | |
Konstantin Komarov | 910013f | 2022-10-07 20:20:14 +0300 | [diff] [blame] | 1109 | /* |
| 1110 | * The code below may require additional cluster (to extend attribute list) |
| 1111 | * and / or one MFT record |
| 1112 | * It is too complex to undo operations if -ENOSPC occurs deep inside |
| 1113 | * in 'ni_insert_nonresident'. |
| 1114 | * Return in advance -ENOSPC here if there are no free cluster and no free MFT. |
| 1115 | */ |
| 1116 | if (!ntfs_check_for_free_space(sbi, 1, 1)) { |
| 1117 | /* Undo step 1. */ |
| 1118 | err = -ENOSPC; |
| 1119 | goto undo1; |
| 1120 | } |
| 1121 | |
| 1122 | step = 2; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1123 | svcn = evcn1; |
| 1124 | |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1125 | /* Estimate next attribute. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1126 | attr = ni_find_attr(ni, attr, &le, ATTR_DATA, NULL, 0, &svcn, &mi); |
| 1127 | |
Konstantin Komarov | 910013f | 2022-10-07 20:20:14 +0300 | [diff] [blame] | 1128 | if (!attr) { |
| 1129 | /* Insert new attribute segment. */ |
| 1130 | goto ins_ext; |
| 1131 | } |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1132 | |
Konstantin Komarov | 910013f | 2022-10-07 20:20:14 +0300 | [diff] [blame] | 1133 | /* Try to update existed attribute segment. */ |
| 1134 | alloc = bytes_to_cluster(sbi, le64_to_cpu(attr_b->nres.alloc_size)); |
| 1135 | evcn = le64_to_cpu(attr->nres.evcn); |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1136 | |
Konstantin Komarov | 910013f | 2022-10-07 20:20:14 +0300 | [diff] [blame] | 1137 | if (end < next_svcn) |
| 1138 | end = next_svcn; |
| 1139 | while (end > evcn) { |
| 1140 | /* Remove segment [svcn : evcn). */ |
| 1141 | mi_remove_attr(NULL, mi, attr); |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1142 | |
Konstantin Komarov | 910013f | 2022-10-07 20:20:14 +0300 | [diff] [blame] | 1143 | if (!al_remove_le(ni, le)) { |
| 1144 | err = -EINVAL; |
| 1145 | goto out; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1146 | } |
| 1147 | |
Konstantin Komarov | 910013f | 2022-10-07 20:20:14 +0300 | [diff] [blame] | 1148 | if (evcn + 1 >= alloc) { |
| 1149 | /* Last attribute segment. */ |
| 1150 | evcn1 = evcn + 1; |
| 1151 | goto ins_ext; |
| 1152 | } |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1153 | |
Konstantin Komarov | 910013f | 2022-10-07 20:20:14 +0300 | [diff] [blame] | 1154 | if (ni_load_mi(ni, le, &mi)) { |
| 1155 | attr = NULL; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1156 | goto out; |
Konstantin Komarov | 910013f | 2022-10-07 20:20:14 +0300 | [diff] [blame] | 1157 | } |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1158 | |
Konstantin Komarov | 910013f | 2022-10-07 20:20:14 +0300 | [diff] [blame] | 1159 | attr = mi_find_attr(mi, NULL, ATTR_DATA, NULL, 0, &le->id); |
| 1160 | if (!attr) { |
| 1161 | err = -EINVAL; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1162 | goto out; |
Konstantin Komarov | 910013f | 2022-10-07 20:20:14 +0300 | [diff] [blame] | 1163 | } |
| 1164 | svcn = le64_to_cpu(attr->nres.svcn); |
| 1165 | evcn = le64_to_cpu(attr->nres.evcn); |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1166 | } |
Konstantin Komarov | 910013f | 2022-10-07 20:20:14 +0300 | [diff] [blame] | 1167 | |
| 1168 | if (end < svcn) |
| 1169 | end = svcn; |
| 1170 | |
| 1171 | err = attr_load_runs(attr, ni, run, &end); |
| 1172 | if (err) |
| 1173 | goto out; |
| 1174 | |
| 1175 | evcn1 = evcn + 1; |
| 1176 | attr->nres.svcn = cpu_to_le64(next_svcn); |
| 1177 | err = mi_pack_runs(mi, attr, run, evcn1 - next_svcn); |
| 1178 | if (err) |
| 1179 | goto out; |
| 1180 | |
| 1181 | le->vcn = cpu_to_le64(next_svcn); |
| 1182 | ni->attr_list.dirty = true; |
| 1183 | mi->dirty = true; |
| 1184 | next_svcn = le64_to_cpu(attr->nres.evcn) + 1; |
| 1185 | |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1186 | ins_ext: |
| 1187 | if (evcn1 > next_svcn) { |
| 1188 | err = ni_insert_nonresident(ni, ATTR_DATA, NULL, 0, run, |
| 1189 | next_svcn, evcn1 - next_svcn, |
Konstantin Komarov | c1e0ab37 | 2022-05-13 18:25:04 +0300 | [diff] [blame] | 1190 | attr_b->flags, &attr, &mi, NULL); |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1191 | if (err) |
| 1192 | goto out; |
| 1193 | } |
| 1194 | ok: |
| 1195 | run_truncate_around(run, vcn); |
| 1196 | out: |
Konstantin Komarov | 910013f | 2022-10-07 20:20:14 +0300 | [diff] [blame] | 1197 | if (err && step > 1) { |
| 1198 | /* Too complex to restore. */ |
| 1199 | _ntfs_bad_inode(&ni->vfs_inode); |
| 1200 | } |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1201 | up_write(&ni->file.run_lock); |
| 1202 | ni_unlock(ni); |
| 1203 | |
| 1204 | return err; |
Konstantin Komarov | 910013f | 2022-10-07 20:20:14 +0300 | [diff] [blame] | 1205 | |
| 1206 | undo1: |
| 1207 | /* Undo step1. */ |
| 1208 | attr_b->nres.total_size = cpu_to_le64(total_size0); |
| 1209 | inode_set_bytes(&ni->vfs_inode, total_size0); |
| 1210 | |
| 1211 | if (run_deallocate_ex(sbi, run, vcn, alen, NULL, false) || |
| 1212 | !run_add_entry(run, vcn, SPARSE_LCN, alen, false) || |
| 1213 | mi_pack_runs(mi, attr, run, max(end, evcn1) - svcn)) { |
| 1214 | _ntfs_bad_inode(&ni->vfs_inode); |
| 1215 | } |
| 1216 | goto out; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1217 | } |
| 1218 | |
| 1219 | int attr_data_read_resident(struct ntfs_inode *ni, struct page *page) |
| 1220 | { |
| 1221 | u64 vbo; |
| 1222 | struct ATTRIB *attr; |
| 1223 | u32 data_size; |
| 1224 | |
| 1225 | attr = ni_find_attr(ni, NULL, NULL, ATTR_DATA, NULL, 0, NULL, NULL); |
| 1226 | if (!attr) |
| 1227 | return -EINVAL; |
| 1228 | |
| 1229 | if (attr->non_res) |
| 1230 | return E_NTFS_NONRESIDENT; |
| 1231 | |
| 1232 | vbo = page->index << PAGE_SHIFT; |
| 1233 | data_size = le32_to_cpu(attr->res.data_size); |
| 1234 | if (vbo < data_size) { |
| 1235 | const char *data = resident_data(attr); |
| 1236 | char *kaddr = kmap_atomic(page); |
| 1237 | u32 use = data_size - vbo; |
| 1238 | |
| 1239 | if (use > PAGE_SIZE) |
| 1240 | use = PAGE_SIZE; |
| 1241 | |
| 1242 | memcpy(kaddr, data + vbo, use); |
| 1243 | memset(kaddr + use, 0, PAGE_SIZE - use); |
| 1244 | kunmap_atomic(kaddr); |
| 1245 | flush_dcache_page(page); |
| 1246 | SetPageUptodate(page); |
| 1247 | } else if (!PageUptodate(page)) { |
| 1248 | zero_user_segment(page, 0, PAGE_SIZE); |
| 1249 | SetPageUptodate(page); |
| 1250 | } |
| 1251 | |
| 1252 | return 0; |
| 1253 | } |
| 1254 | |
| 1255 | int attr_data_write_resident(struct ntfs_inode *ni, struct page *page) |
| 1256 | { |
| 1257 | u64 vbo; |
| 1258 | struct mft_inode *mi; |
| 1259 | struct ATTRIB *attr; |
| 1260 | u32 data_size; |
| 1261 | |
| 1262 | attr = ni_find_attr(ni, NULL, NULL, ATTR_DATA, NULL, 0, NULL, &mi); |
| 1263 | if (!attr) |
| 1264 | return -EINVAL; |
| 1265 | |
| 1266 | if (attr->non_res) { |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1267 | /* Return special error code to check this case. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1268 | return E_NTFS_NONRESIDENT; |
| 1269 | } |
| 1270 | |
| 1271 | vbo = page->index << PAGE_SHIFT; |
| 1272 | data_size = le32_to_cpu(attr->res.data_size); |
| 1273 | if (vbo < data_size) { |
| 1274 | char *data = resident_data(attr); |
| 1275 | char *kaddr = kmap_atomic(page); |
| 1276 | u32 use = data_size - vbo; |
| 1277 | |
| 1278 | if (use > PAGE_SIZE) |
| 1279 | use = PAGE_SIZE; |
| 1280 | memcpy(data + vbo, kaddr, use); |
| 1281 | kunmap_atomic(kaddr); |
| 1282 | mi->dirty = true; |
| 1283 | } |
| 1284 | ni->i_valid = data_size; |
| 1285 | |
| 1286 | return 0; |
| 1287 | } |
| 1288 | |
| 1289 | /* |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1290 | * attr_load_runs_vcn - Load runs with VCN. |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1291 | */ |
| 1292 | int attr_load_runs_vcn(struct ntfs_inode *ni, enum ATTR_TYPE type, |
| 1293 | const __le16 *name, u8 name_len, struct runs_tree *run, |
| 1294 | CLST vcn) |
| 1295 | { |
| 1296 | struct ATTRIB *attr; |
| 1297 | int err; |
| 1298 | CLST svcn, evcn; |
| 1299 | u16 ro; |
| 1300 | |
Edward Lo | 2681631 | 2022-08-07 01:05:18 +0800 | [diff] [blame] | 1301 | if (!ni) { |
| 1302 | /* Is record corrupted? */ |
| 1303 | return -ENOENT; |
| 1304 | } |
| 1305 | |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1306 | attr = ni_find_attr(ni, NULL, NULL, type, name, name_len, &vcn, NULL); |
Konstantin Komarov | d362446 | 2021-08-31 16:57:40 +0300 | [diff] [blame] | 1307 | if (!attr) { |
| 1308 | /* Is record corrupted? */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1309 | return -ENOENT; |
Konstantin Komarov | d362446 | 2021-08-31 16:57:40 +0300 | [diff] [blame] | 1310 | } |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1311 | |
| 1312 | svcn = le64_to_cpu(attr->nres.svcn); |
| 1313 | evcn = le64_to_cpu(attr->nres.evcn); |
| 1314 | |
Konstantin Komarov | d362446 | 2021-08-31 16:57:40 +0300 | [diff] [blame] | 1315 | if (evcn < vcn || vcn < svcn) { |
| 1316 | /* Is record corrupted? */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1317 | return -EINVAL; |
Konstantin Komarov | d362446 | 2021-08-31 16:57:40 +0300 | [diff] [blame] | 1318 | } |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1319 | |
| 1320 | ro = le16_to_cpu(attr->nres.run_off); |
Edward Lo | 6db6208 | 2022-08-06 00:47:27 +0800 | [diff] [blame] | 1321 | |
| 1322 | if (ro > le32_to_cpu(attr->size)) |
| 1323 | return -EINVAL; |
| 1324 | |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1325 | err = run_unpack_ex(run, ni->mi.sbi, ni->mi.rno, svcn, evcn, svcn, |
| 1326 | Add2Ptr(attr, ro), le32_to_cpu(attr->size) - ro); |
| 1327 | if (err < 0) |
| 1328 | return err; |
| 1329 | return 0; |
| 1330 | } |
| 1331 | |
| 1332 | /* |
Konstantin Komarov | d362446 | 2021-08-31 16:57:40 +0300 | [diff] [blame] | 1333 | * attr_load_runs_range - Load runs for given range [from to). |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1334 | */ |
| 1335 | int attr_load_runs_range(struct ntfs_inode *ni, enum ATTR_TYPE type, |
| 1336 | const __le16 *name, u8 name_len, struct runs_tree *run, |
| 1337 | u64 from, u64 to) |
| 1338 | { |
| 1339 | struct ntfs_sb_info *sbi = ni->mi.sbi; |
| 1340 | u8 cluster_bits = sbi->cluster_bits; |
Colin Ian King | dc8965a | 2022-04-18 17:00:00 +0300 | [diff] [blame] | 1341 | CLST vcn; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1342 | CLST vcn_last = (to - 1) >> cluster_bits; |
| 1343 | CLST lcn, clen; |
| 1344 | int err; |
| 1345 | |
| 1346 | for (vcn = from >> cluster_bits; vcn <= vcn_last; vcn += clen) { |
| 1347 | if (!run_lookup_entry(run, vcn, &lcn, &clen, NULL)) { |
| 1348 | err = attr_load_runs_vcn(ni, type, name, name_len, run, |
| 1349 | vcn); |
| 1350 | if (err) |
| 1351 | return err; |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1352 | clen = 0; /* Next run_lookup_entry(vcn) must be success. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1353 | } |
| 1354 | } |
| 1355 | |
| 1356 | return 0; |
| 1357 | } |
| 1358 | |
| 1359 | #ifdef CONFIG_NTFS3_LZX_XPRESS |
| 1360 | /* |
| 1361 | * attr_wof_frame_info |
| 1362 | * |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1363 | * Read header of Xpress/LZX file to get info about frame. |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1364 | */ |
| 1365 | int attr_wof_frame_info(struct ntfs_inode *ni, struct ATTRIB *attr, |
| 1366 | struct runs_tree *run, u64 frame, u64 frames, |
| 1367 | u8 frame_bits, u32 *ondisk_size, u64 *vbo_data) |
| 1368 | { |
| 1369 | struct ntfs_sb_info *sbi = ni->mi.sbi; |
| 1370 | u64 vbo[2], off[2], wof_size; |
| 1371 | u32 voff; |
| 1372 | u8 bytes_per_off; |
| 1373 | char *addr; |
| 1374 | struct page *page; |
| 1375 | int i, err; |
| 1376 | __le32 *off32; |
| 1377 | __le64 *off64; |
| 1378 | |
| 1379 | if (ni->vfs_inode.i_size < 0x100000000ull) { |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1380 | /* File starts with array of 32 bit offsets. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1381 | bytes_per_off = sizeof(__le32); |
| 1382 | vbo[1] = frame << 2; |
| 1383 | *vbo_data = frames << 2; |
| 1384 | } else { |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1385 | /* File starts with array of 64 bit offsets. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1386 | bytes_per_off = sizeof(__le64); |
| 1387 | vbo[1] = frame << 3; |
| 1388 | *vbo_data = frames << 3; |
| 1389 | } |
| 1390 | |
| 1391 | /* |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1392 | * Read 4/8 bytes at [vbo - 4(8)] == offset where compressed frame starts. |
| 1393 | * Read 4/8 bytes at [vbo] == offset where compressed frame ends. |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1394 | */ |
| 1395 | if (!attr->non_res) { |
| 1396 | if (vbo[1] + bytes_per_off > le32_to_cpu(attr->res.data_size)) { |
| 1397 | ntfs_inode_err(&ni->vfs_inode, "is corrupted"); |
| 1398 | return -EINVAL; |
| 1399 | } |
| 1400 | addr = resident_data(attr); |
| 1401 | |
| 1402 | if (bytes_per_off == sizeof(__le32)) { |
| 1403 | off32 = Add2Ptr(addr, vbo[1]); |
| 1404 | off[0] = vbo[1] ? le32_to_cpu(off32[-1]) : 0; |
| 1405 | off[1] = le32_to_cpu(off32[0]); |
| 1406 | } else { |
| 1407 | off64 = Add2Ptr(addr, vbo[1]); |
| 1408 | off[0] = vbo[1] ? le64_to_cpu(off64[-1]) : 0; |
| 1409 | off[1] = le64_to_cpu(off64[0]); |
| 1410 | } |
| 1411 | |
| 1412 | *vbo_data += off[0]; |
| 1413 | *ondisk_size = off[1] - off[0]; |
| 1414 | return 0; |
| 1415 | } |
| 1416 | |
| 1417 | wof_size = le64_to_cpu(attr->nres.data_size); |
| 1418 | down_write(&ni->file.run_lock); |
| 1419 | page = ni->file.offs_page; |
| 1420 | if (!page) { |
| 1421 | page = alloc_page(GFP_KERNEL); |
| 1422 | if (!page) { |
| 1423 | err = -ENOMEM; |
| 1424 | goto out; |
| 1425 | } |
| 1426 | page->index = -1; |
| 1427 | ni->file.offs_page = page; |
| 1428 | } |
| 1429 | lock_page(page); |
| 1430 | addr = page_address(page); |
| 1431 | |
| 1432 | if (vbo[1]) { |
| 1433 | voff = vbo[1] & (PAGE_SIZE - 1); |
| 1434 | vbo[0] = vbo[1] - bytes_per_off; |
| 1435 | i = 0; |
| 1436 | } else { |
| 1437 | voff = 0; |
| 1438 | vbo[0] = 0; |
| 1439 | off[0] = 0; |
| 1440 | i = 1; |
| 1441 | } |
| 1442 | |
| 1443 | do { |
| 1444 | pgoff_t index = vbo[i] >> PAGE_SHIFT; |
| 1445 | |
| 1446 | if (index != page->index) { |
| 1447 | u64 from = vbo[i] & ~(u64)(PAGE_SIZE - 1); |
| 1448 | u64 to = min(from + PAGE_SIZE, wof_size); |
| 1449 | |
| 1450 | err = attr_load_runs_range(ni, ATTR_DATA, WOF_NAME, |
| 1451 | ARRAY_SIZE(WOF_NAME), run, |
| 1452 | from, to); |
| 1453 | if (err) |
| 1454 | goto out1; |
| 1455 | |
| 1456 | err = ntfs_bio_pages(sbi, run, &page, 1, from, |
| 1457 | to - from, REQ_OP_READ); |
| 1458 | if (err) { |
| 1459 | page->index = -1; |
| 1460 | goto out1; |
| 1461 | } |
| 1462 | page->index = index; |
| 1463 | } |
| 1464 | |
| 1465 | if (i) { |
| 1466 | if (bytes_per_off == sizeof(__le32)) { |
| 1467 | off32 = Add2Ptr(addr, voff); |
| 1468 | off[1] = le32_to_cpu(*off32); |
| 1469 | } else { |
| 1470 | off64 = Add2Ptr(addr, voff); |
| 1471 | off[1] = le64_to_cpu(*off64); |
| 1472 | } |
| 1473 | } else if (!voff) { |
| 1474 | if (bytes_per_off == sizeof(__le32)) { |
| 1475 | off32 = Add2Ptr(addr, PAGE_SIZE - sizeof(u32)); |
| 1476 | off[0] = le32_to_cpu(*off32); |
| 1477 | } else { |
| 1478 | off64 = Add2Ptr(addr, PAGE_SIZE - sizeof(u64)); |
| 1479 | off[0] = le64_to_cpu(*off64); |
| 1480 | } |
| 1481 | } else { |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1482 | /* Two values in one page. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1483 | if (bytes_per_off == sizeof(__le32)) { |
| 1484 | off32 = Add2Ptr(addr, voff); |
| 1485 | off[0] = le32_to_cpu(off32[-1]); |
| 1486 | off[1] = le32_to_cpu(off32[0]); |
| 1487 | } else { |
| 1488 | off64 = Add2Ptr(addr, voff); |
| 1489 | off[0] = le64_to_cpu(off64[-1]); |
| 1490 | off[1] = le64_to_cpu(off64[0]); |
| 1491 | } |
| 1492 | break; |
| 1493 | } |
| 1494 | } while (++i < 2); |
| 1495 | |
| 1496 | *vbo_data += off[0]; |
| 1497 | *ondisk_size = off[1] - off[0]; |
| 1498 | |
| 1499 | out1: |
| 1500 | unlock_page(page); |
| 1501 | out: |
| 1502 | up_write(&ni->file.run_lock); |
| 1503 | return err; |
| 1504 | } |
| 1505 | #endif |
| 1506 | |
| 1507 | /* |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1508 | * attr_is_frame_compressed - Used to detect compressed frame. |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1509 | */ |
| 1510 | int attr_is_frame_compressed(struct ntfs_inode *ni, struct ATTRIB *attr, |
| 1511 | CLST frame, CLST *clst_data) |
| 1512 | { |
| 1513 | int err; |
| 1514 | u32 clst_frame; |
| 1515 | CLST clen, lcn, vcn, alen, slen, vcn_next; |
| 1516 | size_t idx; |
| 1517 | struct runs_tree *run; |
| 1518 | |
| 1519 | *clst_data = 0; |
| 1520 | |
| 1521 | if (!is_attr_compressed(attr)) |
| 1522 | return 0; |
| 1523 | |
| 1524 | if (!attr->non_res) |
| 1525 | return 0; |
| 1526 | |
| 1527 | clst_frame = 1u << attr->nres.c_unit; |
| 1528 | vcn = frame * clst_frame; |
| 1529 | run = &ni->file.run; |
| 1530 | |
| 1531 | if (!run_lookup_entry(run, vcn, &lcn, &clen, &idx)) { |
| 1532 | err = attr_load_runs_vcn(ni, attr->type, attr_name(attr), |
| 1533 | attr->name_len, run, vcn); |
| 1534 | if (err) |
| 1535 | return err; |
| 1536 | |
| 1537 | if (!run_lookup_entry(run, vcn, &lcn, &clen, &idx)) |
| 1538 | return -EINVAL; |
| 1539 | } |
| 1540 | |
| 1541 | if (lcn == SPARSE_LCN) { |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1542 | /* Sparsed frame. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1543 | return 0; |
| 1544 | } |
| 1545 | |
| 1546 | if (clen >= clst_frame) { |
| 1547 | /* |
| 1548 | * The frame is not compressed 'cause |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1549 | * it does not contain any sparse clusters. |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1550 | */ |
| 1551 | *clst_data = clst_frame; |
| 1552 | return 0; |
| 1553 | } |
| 1554 | |
| 1555 | alen = bytes_to_cluster(ni->mi.sbi, le64_to_cpu(attr->nres.alloc_size)); |
| 1556 | slen = 0; |
| 1557 | *clst_data = clen; |
| 1558 | |
| 1559 | /* |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1560 | * The frame is compressed if *clst_data + slen >= clst_frame. |
| 1561 | * Check next fragments. |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1562 | */ |
| 1563 | while ((vcn += clen) < alen) { |
| 1564 | vcn_next = vcn; |
| 1565 | |
| 1566 | if (!run_get_entry(run, ++idx, &vcn, &lcn, &clen) || |
| 1567 | vcn_next != vcn) { |
| 1568 | err = attr_load_runs_vcn(ni, attr->type, |
| 1569 | attr_name(attr), |
| 1570 | attr->name_len, run, vcn_next); |
| 1571 | if (err) |
| 1572 | return err; |
| 1573 | vcn = vcn_next; |
| 1574 | |
| 1575 | if (!run_lookup_entry(run, vcn, &lcn, &clen, &idx)) |
| 1576 | return -EINVAL; |
| 1577 | } |
| 1578 | |
| 1579 | if (lcn == SPARSE_LCN) { |
| 1580 | slen += clen; |
| 1581 | } else { |
| 1582 | if (slen) { |
| 1583 | /* |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1584 | * Data_clusters + sparse_clusters = |
| 1585 | * not enough for frame. |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1586 | */ |
| 1587 | return -EINVAL; |
| 1588 | } |
| 1589 | *clst_data += clen; |
| 1590 | } |
| 1591 | |
| 1592 | if (*clst_data + slen >= clst_frame) { |
| 1593 | if (!slen) { |
| 1594 | /* |
| 1595 | * There is no sparsed clusters in this frame |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1596 | * so it is not compressed. |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1597 | */ |
| 1598 | *clst_data = clst_frame; |
| 1599 | } else { |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1600 | /* Frame is compressed. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1601 | } |
| 1602 | break; |
| 1603 | } |
| 1604 | } |
| 1605 | |
| 1606 | return 0; |
| 1607 | } |
| 1608 | |
| 1609 | /* |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1610 | * attr_allocate_frame - Allocate/free clusters for @frame. |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1611 | * |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1612 | * Assumed: down_write(&ni->file.run_lock); |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1613 | */ |
| 1614 | int attr_allocate_frame(struct ntfs_inode *ni, CLST frame, size_t compr_size, |
| 1615 | u64 new_valid) |
| 1616 | { |
| 1617 | int err = 0; |
| 1618 | struct runs_tree *run = &ni->file.run; |
| 1619 | struct ntfs_sb_info *sbi = ni->mi.sbi; |
| 1620 | struct ATTRIB *attr = NULL, *attr_b; |
| 1621 | struct ATTR_LIST_ENTRY *le, *le_b; |
| 1622 | struct mft_inode *mi, *mi_b; |
Konstantin Komarov | c380b52 | 2022-10-07 14:02:36 +0300 | [diff] [blame] | 1623 | CLST svcn, evcn1, next_svcn, len; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1624 | CLST vcn, end, clst_data; |
| 1625 | u64 total_size, valid_size, data_size; |
| 1626 | |
| 1627 | le_b = NULL; |
| 1628 | attr_b = ni_find_attr(ni, NULL, &le_b, ATTR_DATA, NULL, 0, NULL, &mi_b); |
| 1629 | if (!attr_b) |
| 1630 | return -ENOENT; |
| 1631 | |
| 1632 | if (!is_attr_ext(attr_b)) |
| 1633 | return -EINVAL; |
| 1634 | |
| 1635 | vcn = frame << NTFS_LZNT_CUNIT; |
| 1636 | total_size = le64_to_cpu(attr_b->nres.total_size); |
| 1637 | |
| 1638 | svcn = le64_to_cpu(attr_b->nres.svcn); |
| 1639 | evcn1 = le64_to_cpu(attr_b->nres.evcn) + 1; |
| 1640 | data_size = le64_to_cpu(attr_b->nres.data_size); |
| 1641 | |
| 1642 | if (svcn <= vcn && vcn < evcn1) { |
| 1643 | attr = attr_b; |
| 1644 | le = le_b; |
| 1645 | mi = mi_b; |
| 1646 | } else if (!le_b) { |
| 1647 | err = -EINVAL; |
| 1648 | goto out; |
| 1649 | } else { |
| 1650 | le = le_b; |
| 1651 | attr = ni_find_attr(ni, attr_b, &le, ATTR_DATA, NULL, 0, &vcn, |
| 1652 | &mi); |
| 1653 | if (!attr) { |
| 1654 | err = -EINVAL; |
| 1655 | goto out; |
| 1656 | } |
| 1657 | svcn = le64_to_cpu(attr->nres.svcn); |
| 1658 | evcn1 = le64_to_cpu(attr->nres.evcn) + 1; |
| 1659 | } |
| 1660 | |
| 1661 | err = attr_load_runs(attr, ni, run, NULL); |
| 1662 | if (err) |
| 1663 | goto out; |
| 1664 | |
| 1665 | err = attr_is_frame_compressed(ni, attr_b, frame, &clst_data); |
| 1666 | if (err) |
| 1667 | goto out; |
| 1668 | |
| 1669 | total_size -= (u64)clst_data << sbi->cluster_bits; |
| 1670 | |
| 1671 | len = bytes_to_cluster(sbi, compr_size); |
| 1672 | |
| 1673 | if (len == clst_data) |
| 1674 | goto out; |
| 1675 | |
| 1676 | if (len < clst_data) { |
| 1677 | err = run_deallocate_ex(sbi, run, vcn + len, clst_data - len, |
| 1678 | NULL, true); |
| 1679 | if (err) |
| 1680 | goto out; |
| 1681 | |
| 1682 | if (!run_add_entry(run, vcn + len, SPARSE_LCN, clst_data - len, |
| 1683 | false)) { |
| 1684 | err = -ENOMEM; |
| 1685 | goto out; |
| 1686 | } |
| 1687 | end = vcn + clst_data; |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1688 | /* Run contains updated range [vcn + len : end). */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1689 | } else { |
| 1690 | CLST alen, hint = 0; |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1691 | /* Get the last LCN to allocate from. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1692 | if (vcn + clst_data && |
| 1693 | !run_lookup_entry(run, vcn + clst_data - 1, &hint, NULL, |
| 1694 | NULL)) { |
| 1695 | hint = -1; |
| 1696 | } |
| 1697 | |
| 1698 | err = attr_allocate_clusters(sbi, run, vcn + clst_data, |
Konstantin Komarov | c380b52 | 2022-10-07 14:02:36 +0300 | [diff] [blame] | 1699 | hint + 1, len - clst_data, NULL, |
| 1700 | ALLOCATE_DEF, &alen, 0, NULL, |
| 1701 | NULL); |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1702 | if (err) |
| 1703 | goto out; |
| 1704 | |
| 1705 | end = vcn + len; |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1706 | /* Run contains updated range [vcn + clst_data : end). */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1707 | } |
| 1708 | |
| 1709 | total_size += (u64)len << sbi->cluster_bits; |
| 1710 | |
| 1711 | repack: |
| 1712 | err = mi_pack_runs(mi, attr, run, max(end, evcn1) - svcn); |
| 1713 | if (err) |
| 1714 | goto out; |
| 1715 | |
| 1716 | attr_b->nres.total_size = cpu_to_le64(total_size); |
| 1717 | inode_set_bytes(&ni->vfs_inode, total_size); |
| 1718 | |
| 1719 | mi_b->dirty = true; |
| 1720 | mark_inode_dirty(&ni->vfs_inode); |
| 1721 | |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1722 | /* Stored [vcn : next_svcn) from [vcn : end). */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1723 | next_svcn = le64_to_cpu(attr->nres.evcn) + 1; |
| 1724 | |
| 1725 | if (end <= evcn1) { |
| 1726 | if (next_svcn == evcn1) { |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1727 | /* Normal way. Update attribute and exit. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1728 | goto ok; |
| 1729 | } |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1730 | /* Add new segment [next_svcn : evcn1 - next_svcn). */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1731 | if (!ni->attr_list.size) { |
| 1732 | err = ni_create_attr_list(ni); |
| 1733 | if (err) |
| 1734 | goto out; |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1735 | /* Layout of records is changed. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1736 | le_b = NULL; |
| 1737 | attr_b = ni_find_attr(ni, NULL, &le_b, ATTR_DATA, NULL, |
| 1738 | 0, NULL, &mi_b); |
| 1739 | if (!attr_b) { |
| 1740 | err = -ENOENT; |
| 1741 | goto out; |
| 1742 | } |
| 1743 | |
| 1744 | attr = attr_b; |
| 1745 | le = le_b; |
| 1746 | mi = mi_b; |
| 1747 | goto repack; |
| 1748 | } |
| 1749 | } |
| 1750 | |
| 1751 | svcn = evcn1; |
| 1752 | |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1753 | /* Estimate next attribute. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1754 | attr = ni_find_attr(ni, attr, &le, ATTR_DATA, NULL, 0, &svcn, &mi); |
| 1755 | |
| 1756 | if (attr) { |
| 1757 | CLST alloc = bytes_to_cluster( |
| 1758 | sbi, le64_to_cpu(attr_b->nres.alloc_size)); |
| 1759 | CLST evcn = le64_to_cpu(attr->nres.evcn); |
| 1760 | |
| 1761 | if (end < next_svcn) |
| 1762 | end = next_svcn; |
| 1763 | while (end > evcn) { |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1764 | /* Remove segment [svcn : evcn). */ |
Konstantin Komarov | 78ab59f | 2021-08-31 18:52:39 +0300 | [diff] [blame] | 1765 | mi_remove_attr(NULL, mi, attr); |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1766 | |
| 1767 | if (!al_remove_le(ni, le)) { |
| 1768 | err = -EINVAL; |
| 1769 | goto out; |
| 1770 | } |
| 1771 | |
| 1772 | if (evcn + 1 >= alloc) { |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1773 | /* Last attribute segment. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1774 | evcn1 = evcn + 1; |
| 1775 | goto ins_ext; |
| 1776 | } |
| 1777 | |
| 1778 | if (ni_load_mi(ni, le, &mi)) { |
| 1779 | attr = NULL; |
| 1780 | goto out; |
| 1781 | } |
| 1782 | |
| 1783 | attr = mi_find_attr(mi, NULL, ATTR_DATA, NULL, 0, |
| 1784 | &le->id); |
| 1785 | if (!attr) { |
| 1786 | err = -EINVAL; |
| 1787 | goto out; |
| 1788 | } |
| 1789 | svcn = le64_to_cpu(attr->nres.svcn); |
| 1790 | evcn = le64_to_cpu(attr->nres.evcn); |
| 1791 | } |
| 1792 | |
| 1793 | if (end < svcn) |
| 1794 | end = svcn; |
| 1795 | |
| 1796 | err = attr_load_runs(attr, ni, run, &end); |
| 1797 | if (err) |
| 1798 | goto out; |
| 1799 | |
| 1800 | evcn1 = evcn + 1; |
| 1801 | attr->nres.svcn = cpu_to_le64(next_svcn); |
| 1802 | err = mi_pack_runs(mi, attr, run, evcn1 - next_svcn); |
| 1803 | if (err) |
| 1804 | goto out; |
| 1805 | |
| 1806 | le->vcn = cpu_to_le64(next_svcn); |
| 1807 | ni->attr_list.dirty = true; |
| 1808 | mi->dirty = true; |
| 1809 | |
| 1810 | next_svcn = le64_to_cpu(attr->nres.evcn) + 1; |
| 1811 | } |
| 1812 | ins_ext: |
| 1813 | if (evcn1 > next_svcn) { |
| 1814 | err = ni_insert_nonresident(ni, ATTR_DATA, NULL, 0, run, |
| 1815 | next_svcn, evcn1 - next_svcn, |
Konstantin Komarov | c1e0ab37 | 2022-05-13 18:25:04 +0300 | [diff] [blame] | 1816 | attr_b->flags, &attr, &mi, NULL); |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1817 | if (err) |
| 1818 | goto out; |
| 1819 | } |
| 1820 | ok: |
| 1821 | run_truncate_around(run, vcn); |
| 1822 | out: |
| 1823 | if (new_valid > data_size) |
| 1824 | new_valid = data_size; |
| 1825 | |
| 1826 | valid_size = le64_to_cpu(attr_b->nres.valid_size); |
| 1827 | if (new_valid != valid_size) { |
| 1828 | attr_b->nres.valid_size = cpu_to_le64(valid_size); |
| 1829 | mi_b->dirty = true; |
| 1830 | } |
| 1831 | |
| 1832 | return err; |
| 1833 | } |
| 1834 | |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1835 | /* |
| 1836 | * attr_collapse_range - Collapse range in file. |
| 1837 | */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1838 | int attr_collapse_range(struct ntfs_inode *ni, u64 vbo, u64 bytes) |
| 1839 | { |
| 1840 | int err = 0; |
| 1841 | struct runs_tree *run = &ni->file.run; |
| 1842 | struct ntfs_sb_info *sbi = ni->mi.sbi; |
| 1843 | struct ATTRIB *attr = NULL, *attr_b; |
| 1844 | struct ATTR_LIST_ENTRY *le, *le_b; |
| 1845 | struct mft_inode *mi, *mi_b; |
| 1846 | CLST svcn, evcn1, len, dealloc, alen; |
| 1847 | CLST vcn, end; |
| 1848 | u64 valid_size, data_size, alloc_size, total_size; |
| 1849 | u32 mask; |
| 1850 | __le16 a_flags; |
| 1851 | |
| 1852 | if (!bytes) |
| 1853 | return 0; |
| 1854 | |
| 1855 | le_b = NULL; |
| 1856 | attr_b = ni_find_attr(ni, NULL, &le_b, ATTR_DATA, NULL, 0, NULL, &mi_b); |
| 1857 | if (!attr_b) |
| 1858 | return -ENOENT; |
| 1859 | |
| 1860 | if (!attr_b->non_res) { |
| 1861 | /* Attribute is resident. Nothing to do? */ |
| 1862 | return 0; |
| 1863 | } |
| 1864 | |
| 1865 | data_size = le64_to_cpu(attr_b->nres.data_size); |
| 1866 | alloc_size = le64_to_cpu(attr_b->nres.alloc_size); |
| 1867 | a_flags = attr_b->flags; |
| 1868 | |
| 1869 | if (is_attr_ext(attr_b)) { |
| 1870 | total_size = le64_to_cpu(attr_b->nres.total_size); |
| 1871 | mask = (sbi->cluster_size << attr_b->nres.c_unit) - 1; |
| 1872 | } else { |
| 1873 | total_size = alloc_size; |
| 1874 | mask = sbi->cluster_mask; |
| 1875 | } |
| 1876 | |
| 1877 | if ((vbo & mask) || (bytes & mask)) { |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1878 | /* Allow to collapse only cluster aligned ranges. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1879 | return -EINVAL; |
| 1880 | } |
| 1881 | |
| 1882 | if (vbo > data_size) |
| 1883 | return -EINVAL; |
| 1884 | |
| 1885 | down_write(&ni->file.run_lock); |
| 1886 | |
| 1887 | if (vbo + bytes >= data_size) { |
| 1888 | u64 new_valid = min(ni->i_valid, vbo); |
| 1889 | |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1890 | /* Simple truncate file at 'vbo'. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1891 | truncate_setsize(&ni->vfs_inode, vbo); |
| 1892 | err = attr_set_size(ni, ATTR_DATA, NULL, 0, &ni->file.run, vbo, |
| 1893 | &new_valid, true, NULL); |
| 1894 | |
| 1895 | if (!err && new_valid < ni->i_valid) |
| 1896 | ni->i_valid = new_valid; |
| 1897 | |
| 1898 | goto out; |
| 1899 | } |
| 1900 | |
| 1901 | /* |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1902 | * Enumerate all attribute segments and collapse. |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1903 | */ |
| 1904 | alen = alloc_size >> sbi->cluster_bits; |
| 1905 | vcn = vbo >> sbi->cluster_bits; |
| 1906 | len = bytes >> sbi->cluster_bits; |
| 1907 | end = vcn + len; |
| 1908 | dealloc = 0; |
| 1909 | |
| 1910 | svcn = le64_to_cpu(attr_b->nres.svcn); |
| 1911 | evcn1 = le64_to_cpu(attr_b->nres.evcn) + 1; |
| 1912 | |
| 1913 | if (svcn <= vcn && vcn < evcn1) { |
| 1914 | attr = attr_b; |
| 1915 | le = le_b; |
| 1916 | mi = mi_b; |
| 1917 | } else if (!le_b) { |
| 1918 | err = -EINVAL; |
| 1919 | goto out; |
| 1920 | } else { |
| 1921 | le = le_b; |
| 1922 | attr = ni_find_attr(ni, attr_b, &le, ATTR_DATA, NULL, 0, &vcn, |
| 1923 | &mi); |
| 1924 | if (!attr) { |
| 1925 | err = -EINVAL; |
| 1926 | goto out; |
| 1927 | } |
| 1928 | |
| 1929 | svcn = le64_to_cpu(attr->nres.svcn); |
| 1930 | evcn1 = le64_to_cpu(attr->nres.evcn) + 1; |
| 1931 | } |
| 1932 | |
| 1933 | for (;;) { |
| 1934 | if (svcn >= end) { |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1935 | /* Shift VCN- */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1936 | attr->nres.svcn = cpu_to_le64(svcn - len); |
| 1937 | attr->nres.evcn = cpu_to_le64(evcn1 - 1 - len); |
| 1938 | if (le) { |
| 1939 | le->vcn = attr->nres.svcn; |
| 1940 | ni->attr_list.dirty = true; |
| 1941 | } |
| 1942 | mi->dirty = true; |
| 1943 | } else if (svcn < vcn || end < evcn1) { |
| 1944 | CLST vcn1, eat, next_svcn; |
| 1945 | |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1946 | /* Collapse a part of this attribute segment. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1947 | err = attr_load_runs(attr, ni, run, &svcn); |
| 1948 | if (err) |
| 1949 | goto out; |
| 1950 | vcn1 = max(vcn, svcn); |
| 1951 | eat = min(end, evcn1) - vcn1; |
| 1952 | |
| 1953 | err = run_deallocate_ex(sbi, run, vcn1, eat, &dealloc, |
| 1954 | true); |
| 1955 | if (err) |
| 1956 | goto out; |
| 1957 | |
| 1958 | if (!run_collapse_range(run, vcn1, eat)) { |
| 1959 | err = -ENOMEM; |
| 1960 | goto out; |
| 1961 | } |
| 1962 | |
| 1963 | if (svcn >= vcn) { |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1964 | /* Shift VCN */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1965 | attr->nres.svcn = cpu_to_le64(vcn); |
| 1966 | if (le) { |
| 1967 | le->vcn = attr->nres.svcn; |
| 1968 | ni->attr_list.dirty = true; |
| 1969 | } |
| 1970 | } |
| 1971 | |
| 1972 | err = mi_pack_runs(mi, attr, run, evcn1 - svcn - eat); |
| 1973 | if (err) |
| 1974 | goto out; |
| 1975 | |
| 1976 | next_svcn = le64_to_cpu(attr->nres.evcn) + 1; |
| 1977 | if (next_svcn + eat < evcn1) { |
| 1978 | err = ni_insert_nonresident( |
| 1979 | ni, ATTR_DATA, NULL, 0, run, next_svcn, |
| 1980 | evcn1 - eat - next_svcn, a_flags, &attr, |
Konstantin Komarov | c1e0ab37 | 2022-05-13 18:25:04 +0300 | [diff] [blame] | 1981 | &mi, &le); |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1982 | if (err) |
| 1983 | goto out; |
| 1984 | |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1985 | /* Layout of records maybe changed. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1986 | attr_b = NULL; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1987 | } |
| 1988 | |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 1989 | /* Free all allocated memory. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 1990 | run_truncate(run, 0); |
| 1991 | } else { |
| 1992 | u16 le_sz; |
| 1993 | u16 roff = le16_to_cpu(attr->nres.run_off); |
| 1994 | |
Edward Lo | 6db6208 | 2022-08-06 00:47:27 +0800 | [diff] [blame] | 1995 | if (roff > le32_to_cpu(attr->size)) { |
| 1996 | err = -EINVAL; |
| 1997 | goto out; |
| 1998 | } |
| 1999 | |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2000 | run_unpack_ex(RUN_DEALLOCATE, sbi, ni->mi.rno, svcn, |
| 2001 | evcn1 - 1, svcn, Add2Ptr(attr, roff), |
| 2002 | le32_to_cpu(attr->size) - roff); |
| 2003 | |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 2004 | /* Delete this attribute segment. */ |
Konstantin Komarov | 78ab59f | 2021-08-31 18:52:39 +0300 | [diff] [blame] | 2005 | mi_remove_attr(NULL, mi, attr); |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2006 | if (!le) |
| 2007 | break; |
| 2008 | |
| 2009 | le_sz = le16_to_cpu(le->size); |
| 2010 | if (!al_remove_le(ni, le)) { |
| 2011 | err = -EINVAL; |
| 2012 | goto out; |
| 2013 | } |
| 2014 | |
| 2015 | if (evcn1 >= alen) |
| 2016 | break; |
| 2017 | |
| 2018 | if (!svcn) { |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 2019 | /* Load next record that contains this attribute. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2020 | if (ni_load_mi(ni, le, &mi)) { |
| 2021 | err = -EINVAL; |
| 2022 | goto out; |
| 2023 | } |
| 2024 | |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 2025 | /* Look for required attribute. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2026 | attr = mi_find_attr(mi, NULL, ATTR_DATA, NULL, |
| 2027 | 0, &le->id); |
| 2028 | if (!attr) { |
| 2029 | err = -EINVAL; |
| 2030 | goto out; |
| 2031 | } |
| 2032 | goto next_attr; |
| 2033 | } |
| 2034 | le = (struct ATTR_LIST_ENTRY *)((u8 *)le - le_sz); |
| 2035 | } |
| 2036 | |
| 2037 | if (evcn1 >= alen) |
| 2038 | break; |
| 2039 | |
| 2040 | attr = ni_enum_attr_ex(ni, attr, &le, &mi); |
| 2041 | if (!attr) { |
| 2042 | err = -EINVAL; |
| 2043 | goto out; |
| 2044 | } |
| 2045 | |
| 2046 | next_attr: |
| 2047 | svcn = le64_to_cpu(attr->nres.svcn); |
| 2048 | evcn1 = le64_to_cpu(attr->nres.evcn) + 1; |
| 2049 | } |
| 2050 | |
| 2051 | if (!attr_b) { |
| 2052 | le_b = NULL; |
| 2053 | attr_b = ni_find_attr(ni, NULL, &le_b, ATTR_DATA, NULL, 0, NULL, |
| 2054 | &mi_b); |
| 2055 | if (!attr_b) { |
| 2056 | err = -ENOENT; |
| 2057 | goto out; |
| 2058 | } |
| 2059 | } |
| 2060 | |
| 2061 | data_size -= bytes; |
| 2062 | valid_size = ni->i_valid; |
| 2063 | if (vbo + bytes <= valid_size) |
| 2064 | valid_size -= bytes; |
| 2065 | else if (vbo < valid_size) |
| 2066 | valid_size = vbo; |
| 2067 | |
| 2068 | attr_b->nres.alloc_size = cpu_to_le64(alloc_size - bytes); |
| 2069 | attr_b->nres.data_size = cpu_to_le64(data_size); |
| 2070 | attr_b->nres.valid_size = cpu_to_le64(min(valid_size, data_size)); |
| 2071 | total_size -= (u64)dealloc << sbi->cluster_bits; |
| 2072 | if (is_attr_ext(attr_b)) |
| 2073 | attr_b->nres.total_size = cpu_to_le64(total_size); |
| 2074 | mi_b->dirty = true; |
| 2075 | |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 2076 | /* Update inode size. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2077 | ni->i_valid = valid_size; |
| 2078 | ni->vfs_inode.i_size = data_size; |
| 2079 | inode_set_bytes(&ni->vfs_inode, total_size); |
| 2080 | ni->ni_flags |= NI_FLAG_UPDATE_PARENT; |
| 2081 | mark_inode_dirty(&ni->vfs_inode); |
| 2082 | |
| 2083 | out: |
| 2084 | up_write(&ni->file.run_lock); |
| 2085 | if (err) |
Konstantin Komarov | c12df45 | 2022-07-13 17:55:27 +0300 | [diff] [blame] | 2086 | _ntfs_bad_inode(&ni->vfs_inode); |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2087 | |
| 2088 | return err; |
| 2089 | } |
| 2090 | |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 2091 | /* |
| 2092 | * attr_punch_hole |
| 2093 | * |
| 2094 | * Not for normal files. |
| 2095 | */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2096 | int attr_punch_hole(struct ntfs_inode *ni, u64 vbo, u64 bytes, u32 *frame_size) |
| 2097 | { |
| 2098 | int err = 0; |
| 2099 | struct runs_tree *run = &ni->file.run; |
| 2100 | struct ntfs_sb_info *sbi = ni->mi.sbi; |
| 2101 | struct ATTRIB *attr = NULL, *attr_b; |
| 2102 | struct ATTR_LIST_ENTRY *le, *le_b; |
| 2103 | struct mft_inode *mi, *mi_b; |
Konstantin Komarov | 20abc64 | 2022-07-13 18:18:48 +0300 | [diff] [blame] | 2104 | CLST svcn, evcn1, vcn, len, end, alen, hole, next_svcn; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2105 | u64 total_size, alloc_size; |
| 2106 | u32 mask; |
Konstantin Komarov | c1e0ab37 | 2022-05-13 18:25:04 +0300 | [diff] [blame] | 2107 | __le16 a_flags; |
Konstantin Komarov | 20abc64 | 2022-07-13 18:18:48 +0300 | [diff] [blame] | 2108 | struct runs_tree run2; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2109 | |
| 2110 | if (!bytes) |
| 2111 | return 0; |
| 2112 | |
| 2113 | le_b = NULL; |
| 2114 | attr_b = ni_find_attr(ni, NULL, &le_b, ATTR_DATA, NULL, 0, NULL, &mi_b); |
| 2115 | if (!attr_b) |
| 2116 | return -ENOENT; |
| 2117 | |
| 2118 | if (!attr_b->non_res) { |
Alon Zahavi | 6d5c9e7 | 2022-08-15 14:07:12 +0300 | [diff] [blame] | 2119 | u32 data_size = le32_to_cpu(attr_b->res.data_size); |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2120 | u32 from, to; |
| 2121 | |
| 2122 | if (vbo > data_size) |
| 2123 | return 0; |
| 2124 | |
| 2125 | from = vbo; |
Kari Argillander | 6e3331e | 2021-09-07 17:28:42 +0300 | [diff] [blame] | 2126 | to = min_t(u64, vbo + bytes, data_size); |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2127 | memset(Add2Ptr(resident_data(attr_b), from), 0, to - from); |
| 2128 | return 0; |
| 2129 | } |
| 2130 | |
| 2131 | if (!is_attr_ext(attr_b)) |
| 2132 | return -EOPNOTSUPP; |
| 2133 | |
| 2134 | alloc_size = le64_to_cpu(attr_b->nres.alloc_size); |
| 2135 | total_size = le64_to_cpu(attr_b->nres.total_size); |
| 2136 | |
| 2137 | if (vbo >= alloc_size) { |
Konstantin Komarov | d362446 | 2021-08-31 16:57:40 +0300 | [diff] [blame] | 2138 | /* NOTE: It is allowed. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2139 | return 0; |
| 2140 | } |
| 2141 | |
| 2142 | mask = (sbi->cluster_size << attr_b->nres.c_unit) - 1; |
| 2143 | |
| 2144 | bytes += vbo; |
| 2145 | if (bytes > alloc_size) |
| 2146 | bytes = alloc_size; |
| 2147 | bytes -= vbo; |
| 2148 | |
| 2149 | if ((vbo & mask) || (bytes & mask)) { |
Konstantin Komarov | d362446 | 2021-08-31 16:57:40 +0300 | [diff] [blame] | 2150 | /* We have to zero a range(s). */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2151 | if (frame_size == NULL) { |
Konstantin Komarov | d362446 | 2021-08-31 16:57:40 +0300 | [diff] [blame] | 2152 | /* Caller insists range is aligned. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2153 | return -EINVAL; |
| 2154 | } |
| 2155 | *frame_size = mask + 1; |
| 2156 | return E_NTFS_NOTALIGNED; |
| 2157 | } |
| 2158 | |
| 2159 | down_write(&ni->file.run_lock); |
Konstantin Komarov | 20abc64 | 2022-07-13 18:18:48 +0300 | [diff] [blame] | 2160 | run_init(&run2); |
| 2161 | run_truncate(run, 0); |
| 2162 | |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2163 | /* |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 2164 | * Enumerate all attribute segments and punch hole where necessary. |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2165 | */ |
| 2166 | alen = alloc_size >> sbi->cluster_bits; |
| 2167 | vcn = vbo >> sbi->cluster_bits; |
| 2168 | len = bytes >> sbi->cluster_bits; |
| 2169 | end = vcn + len; |
Konstantin Komarov | 20abc64 | 2022-07-13 18:18:48 +0300 | [diff] [blame] | 2170 | hole = 0; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2171 | |
| 2172 | svcn = le64_to_cpu(attr_b->nres.svcn); |
| 2173 | evcn1 = le64_to_cpu(attr_b->nres.evcn) + 1; |
Konstantin Komarov | c1e0ab37 | 2022-05-13 18:25:04 +0300 | [diff] [blame] | 2174 | a_flags = attr_b->flags; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2175 | |
| 2176 | if (svcn <= vcn && vcn < evcn1) { |
| 2177 | attr = attr_b; |
| 2178 | le = le_b; |
| 2179 | mi = mi_b; |
| 2180 | } else if (!le_b) { |
| 2181 | err = -EINVAL; |
Konstantin Komarov | 20abc64 | 2022-07-13 18:18:48 +0300 | [diff] [blame] | 2182 | goto bad_inode; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2183 | } else { |
| 2184 | le = le_b; |
| 2185 | attr = ni_find_attr(ni, attr_b, &le, ATTR_DATA, NULL, 0, &vcn, |
| 2186 | &mi); |
| 2187 | if (!attr) { |
| 2188 | err = -EINVAL; |
Konstantin Komarov | 20abc64 | 2022-07-13 18:18:48 +0300 | [diff] [blame] | 2189 | goto bad_inode; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2190 | } |
| 2191 | |
| 2192 | svcn = le64_to_cpu(attr->nres.svcn); |
| 2193 | evcn1 = le64_to_cpu(attr->nres.evcn) + 1; |
| 2194 | } |
| 2195 | |
| 2196 | while (svcn < end) { |
Konstantin Komarov | 20abc64 | 2022-07-13 18:18:48 +0300 | [diff] [blame] | 2197 | CLST vcn1, zero, hole2 = hole; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2198 | |
| 2199 | err = attr_load_runs(attr, ni, run, &svcn); |
| 2200 | if (err) |
Konstantin Komarov | 20abc64 | 2022-07-13 18:18:48 +0300 | [diff] [blame] | 2201 | goto done; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2202 | vcn1 = max(vcn, svcn); |
| 2203 | zero = min(end, evcn1) - vcn1; |
| 2204 | |
Konstantin Komarov | 20abc64 | 2022-07-13 18:18:48 +0300 | [diff] [blame] | 2205 | /* |
| 2206 | * Check range [vcn1 + zero). |
| 2207 | * Calculate how many clusters there are. |
| 2208 | * Don't do any destructive actions. |
| 2209 | */ |
| 2210 | err = run_deallocate_ex(NULL, run, vcn1, zero, &hole2, false); |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2211 | if (err) |
Konstantin Komarov | 20abc64 | 2022-07-13 18:18:48 +0300 | [diff] [blame] | 2212 | goto done; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2213 | |
Konstantin Komarov | 20abc64 | 2022-07-13 18:18:48 +0300 | [diff] [blame] | 2214 | /* Check if required range is already hole. */ |
| 2215 | if (hole2 == hole) |
| 2216 | goto next_attr; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2217 | |
Konstantin Komarov | 20abc64 | 2022-07-13 18:18:48 +0300 | [diff] [blame] | 2218 | /* Make a clone of run to undo. */ |
| 2219 | err = run_clone(run, &run2); |
| 2220 | if (err) |
| 2221 | goto done; |
| 2222 | |
| 2223 | /* Make a hole range (sparse) [vcn1 + zero). */ |
| 2224 | if (!run_add_entry(run, vcn1, SPARSE_LCN, zero, false)) { |
| 2225 | err = -ENOMEM; |
| 2226 | goto done; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2227 | } |
Konstantin Komarov | 20abc64 | 2022-07-13 18:18:48 +0300 | [diff] [blame] | 2228 | |
| 2229 | /* Update run in attribute segment. */ |
| 2230 | err = mi_pack_runs(mi, attr, run, evcn1 - svcn); |
| 2231 | if (err) |
| 2232 | goto done; |
| 2233 | next_svcn = le64_to_cpu(attr->nres.evcn) + 1; |
| 2234 | if (next_svcn < evcn1) { |
| 2235 | /* Insert new attribute segment. */ |
| 2236 | err = ni_insert_nonresident(ni, ATTR_DATA, NULL, 0, run, |
| 2237 | next_svcn, |
| 2238 | evcn1 - next_svcn, a_flags, |
| 2239 | &attr, &mi, &le); |
| 2240 | if (err) |
| 2241 | goto undo_punch; |
| 2242 | |
| 2243 | /* Layout of records maybe changed. */ |
| 2244 | attr_b = NULL; |
| 2245 | } |
| 2246 | |
| 2247 | /* Real deallocate. Should not fail. */ |
| 2248 | run_deallocate_ex(sbi, &run2, vcn1, zero, &hole, true); |
| 2249 | |
| 2250 | next_attr: |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 2251 | /* Free all allocated memory. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2252 | run_truncate(run, 0); |
| 2253 | |
| 2254 | if (evcn1 >= alen) |
| 2255 | break; |
| 2256 | |
Konstantin Komarov | 20abc64 | 2022-07-13 18:18:48 +0300 | [diff] [blame] | 2257 | /* Get next attribute segment. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2258 | attr = ni_enum_attr_ex(ni, attr, &le, &mi); |
| 2259 | if (!attr) { |
| 2260 | err = -EINVAL; |
Konstantin Komarov | 20abc64 | 2022-07-13 18:18:48 +0300 | [diff] [blame] | 2261 | goto bad_inode; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2262 | } |
| 2263 | |
| 2264 | svcn = le64_to_cpu(attr->nres.svcn); |
| 2265 | evcn1 = le64_to_cpu(attr->nres.evcn) + 1; |
| 2266 | } |
| 2267 | |
Konstantin Komarov | 20abc64 | 2022-07-13 18:18:48 +0300 | [diff] [blame] | 2268 | done: |
| 2269 | if (!hole) |
| 2270 | goto out; |
| 2271 | |
Konstantin Komarov | 560f773 | 2022-06-30 18:31:26 +0300 | [diff] [blame] | 2272 | if (!attr_b) { |
| 2273 | attr_b = ni_find_attr(ni, NULL, NULL, ATTR_DATA, NULL, 0, NULL, |
| 2274 | &mi_b); |
| 2275 | if (!attr_b) { |
| 2276 | err = -EINVAL; |
Konstantin Komarov | 20abc64 | 2022-07-13 18:18:48 +0300 | [diff] [blame] | 2277 | goto bad_inode; |
Konstantin Komarov | 560f773 | 2022-06-30 18:31:26 +0300 | [diff] [blame] | 2278 | } |
| 2279 | } |
Konstantin Komarov | 20abc64 | 2022-07-13 18:18:48 +0300 | [diff] [blame] | 2280 | |
| 2281 | total_size -= (u64)hole << sbi->cluster_bits; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2282 | attr_b->nres.total_size = cpu_to_le64(total_size); |
| 2283 | mi_b->dirty = true; |
| 2284 | |
Kari Argillander | e8b8e97 | 2021-08-03 14:57:09 +0300 | [diff] [blame] | 2285 | /* Update inode size. */ |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2286 | inode_set_bytes(&ni->vfs_inode, total_size); |
| 2287 | ni->ni_flags |= NI_FLAG_UPDATE_PARENT; |
| 2288 | mark_inode_dirty(&ni->vfs_inode); |
| 2289 | |
| 2290 | out: |
Konstantin Komarov | 20abc64 | 2022-07-13 18:18:48 +0300 | [diff] [blame] | 2291 | run_close(&run2); |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2292 | up_write(&ni->file.run_lock); |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2293 | return err; |
Konstantin Komarov | 20abc64 | 2022-07-13 18:18:48 +0300 | [diff] [blame] | 2294 | |
| 2295 | bad_inode: |
| 2296 | _ntfs_bad_inode(&ni->vfs_inode); |
| 2297 | goto out; |
| 2298 | |
| 2299 | undo_punch: |
| 2300 | /* |
| 2301 | * Restore packed runs. |
| 2302 | * 'mi_pack_runs' should not fail, cause we restore original. |
| 2303 | */ |
| 2304 | if (mi_pack_runs(mi, attr, &run2, evcn1 - svcn)) |
| 2305 | goto bad_inode; |
| 2306 | |
| 2307 | goto done; |
Konstantin Komarov | be71b5c | 2021-08-13 17:21:30 +0300 | [diff] [blame] | 2308 | } |
Konstantin Komarov | aa30ecc | 2022-06-21 12:46:25 +0300 | [diff] [blame] | 2309 | |
| 2310 | /* |
| 2311 | * attr_insert_range - Insert range (hole) in file. |
| 2312 | * Not for normal files. |
| 2313 | */ |
| 2314 | int attr_insert_range(struct ntfs_inode *ni, u64 vbo, u64 bytes) |
| 2315 | { |
| 2316 | int err = 0; |
| 2317 | struct runs_tree *run = &ni->file.run; |
| 2318 | struct ntfs_sb_info *sbi = ni->mi.sbi; |
| 2319 | struct ATTRIB *attr = NULL, *attr_b; |
| 2320 | struct ATTR_LIST_ENTRY *le, *le_b; |
| 2321 | struct mft_inode *mi, *mi_b; |
| 2322 | CLST vcn, svcn, evcn1, len, next_svcn; |
| 2323 | u64 data_size, alloc_size; |
| 2324 | u32 mask; |
| 2325 | __le16 a_flags; |
| 2326 | |
| 2327 | if (!bytes) |
| 2328 | return 0; |
| 2329 | |
| 2330 | le_b = NULL; |
| 2331 | attr_b = ni_find_attr(ni, NULL, &le_b, ATTR_DATA, NULL, 0, NULL, &mi_b); |
| 2332 | if (!attr_b) |
| 2333 | return -ENOENT; |
| 2334 | |
| 2335 | if (!is_attr_ext(attr_b)) { |
| 2336 | /* It was checked above. See fallocate. */ |
| 2337 | return -EOPNOTSUPP; |
| 2338 | } |
| 2339 | |
| 2340 | if (!attr_b->non_res) { |
| 2341 | data_size = le32_to_cpu(attr_b->res.data_size); |
Konstantin Komarov | 13747aa | 2022-05-12 19:18:11 +0300 | [diff] [blame] | 2342 | alloc_size = data_size; |
Konstantin Komarov | aa30ecc | 2022-06-21 12:46:25 +0300 | [diff] [blame] | 2343 | mask = sbi->cluster_mask; /* cluster_size - 1 */ |
| 2344 | } else { |
| 2345 | data_size = le64_to_cpu(attr_b->nres.data_size); |
Konstantin Komarov | 13747aa | 2022-05-12 19:18:11 +0300 | [diff] [blame] | 2346 | alloc_size = le64_to_cpu(attr_b->nres.alloc_size); |
Konstantin Komarov | aa30ecc | 2022-06-21 12:46:25 +0300 | [diff] [blame] | 2347 | mask = (sbi->cluster_size << attr_b->nres.c_unit) - 1; |
| 2348 | } |
| 2349 | |
| 2350 | if (vbo > data_size) { |
| 2351 | /* Insert range after the file size is not allowed. */ |
| 2352 | return -EINVAL; |
| 2353 | } |
| 2354 | |
| 2355 | if ((vbo & mask) || (bytes & mask)) { |
| 2356 | /* Allow to insert only frame aligned ranges. */ |
| 2357 | return -EINVAL; |
| 2358 | } |
| 2359 | |
Konstantin Komarov | 13747aa | 2022-05-12 19:18:11 +0300 | [diff] [blame] | 2360 | /* |
| 2361 | * valid_size <= data_size <= alloc_size |
| 2362 | * Check alloc_size for maximum possible. |
| 2363 | */ |
| 2364 | if (bytes > sbi->maxbytes_sparse - alloc_size) |
| 2365 | return -EFBIG; |
| 2366 | |
Konstantin Komarov | aa30ecc | 2022-06-21 12:46:25 +0300 | [diff] [blame] | 2367 | vcn = vbo >> sbi->cluster_bits; |
| 2368 | len = bytes >> sbi->cluster_bits; |
| 2369 | |
| 2370 | down_write(&ni->file.run_lock); |
| 2371 | |
| 2372 | if (!attr_b->non_res) { |
| 2373 | err = attr_set_size(ni, ATTR_DATA, NULL, 0, run, |
Konstantin Komarov | 9256ec3 | 2022-07-13 18:44:24 +0300 | [diff] [blame] | 2374 | data_size + bytes, NULL, false, NULL); |
Konstantin Komarov | aa30ecc | 2022-06-21 12:46:25 +0300 | [diff] [blame] | 2375 | |
Konstantin Komarov | aa30ecc | 2022-06-21 12:46:25 +0300 | [diff] [blame] | 2376 | le_b = NULL; |
| 2377 | attr_b = ni_find_attr(ni, NULL, &le_b, ATTR_DATA, NULL, 0, NULL, |
| 2378 | &mi_b); |
Dan Carpenter | 4838ec0 | 2022-06-30 16:10:56 +0300 | [diff] [blame] | 2379 | if (!attr_b) { |
Konstantin Komarov | aa30ecc | 2022-06-21 12:46:25 +0300 | [diff] [blame] | 2380 | err = -EINVAL; |
Konstantin Komarov | 9256ec3 | 2022-07-13 18:44:24 +0300 | [diff] [blame] | 2381 | goto bad_inode; |
Konstantin Komarov | aa30ecc | 2022-06-21 12:46:25 +0300 | [diff] [blame] | 2382 | } |
Konstantin Komarov | 9256ec3 | 2022-07-13 18:44:24 +0300 | [diff] [blame] | 2383 | |
| 2384 | if (err) |
| 2385 | goto out; |
| 2386 | |
| 2387 | if (!attr_b->non_res) { |
| 2388 | /* Still resident. */ |
Konstantin Komarov | 9144b43 | 2022-10-06 19:58:11 +0300 | [diff] [blame] | 2389 | char *data = Add2Ptr(attr_b, |
| 2390 | le16_to_cpu(attr_b->res.data_off)); |
Konstantin Komarov | 9256ec3 | 2022-07-13 18:44:24 +0300 | [diff] [blame] | 2391 | |
| 2392 | memmove(data + bytes, data, bytes); |
| 2393 | memset(data, 0, bytes); |
| 2394 | goto done; |
| 2395 | } |
| 2396 | |
| 2397 | /* Resident files becomes nonresident. */ |
Konstantin Komarov | aa30ecc | 2022-06-21 12:46:25 +0300 | [diff] [blame] | 2398 | data_size = le64_to_cpu(attr_b->nres.data_size); |
| 2399 | alloc_size = le64_to_cpu(attr_b->nres.alloc_size); |
| 2400 | } |
| 2401 | |
| 2402 | /* |
| 2403 | * Enumerate all attribute segments and shift start vcn. |
| 2404 | */ |
| 2405 | a_flags = attr_b->flags; |
| 2406 | svcn = le64_to_cpu(attr_b->nres.svcn); |
| 2407 | evcn1 = le64_to_cpu(attr_b->nres.evcn) + 1; |
| 2408 | |
| 2409 | if (svcn <= vcn && vcn < evcn1) { |
| 2410 | attr = attr_b; |
| 2411 | le = le_b; |
| 2412 | mi = mi_b; |
| 2413 | } else if (!le_b) { |
| 2414 | err = -EINVAL; |
Konstantin Komarov | 9256ec3 | 2022-07-13 18:44:24 +0300 | [diff] [blame] | 2415 | goto bad_inode; |
Konstantin Komarov | aa30ecc | 2022-06-21 12:46:25 +0300 | [diff] [blame] | 2416 | } else { |
| 2417 | le = le_b; |
| 2418 | attr = ni_find_attr(ni, attr_b, &le, ATTR_DATA, NULL, 0, &vcn, |
| 2419 | &mi); |
| 2420 | if (!attr) { |
| 2421 | err = -EINVAL; |
Konstantin Komarov | 9256ec3 | 2022-07-13 18:44:24 +0300 | [diff] [blame] | 2422 | goto bad_inode; |
Konstantin Komarov | aa30ecc | 2022-06-21 12:46:25 +0300 | [diff] [blame] | 2423 | } |
| 2424 | |
| 2425 | svcn = le64_to_cpu(attr->nres.svcn); |
| 2426 | evcn1 = le64_to_cpu(attr->nres.evcn) + 1; |
| 2427 | } |
| 2428 | |
| 2429 | run_truncate(run, 0); /* clear cached values. */ |
| 2430 | err = attr_load_runs(attr, ni, run, NULL); |
| 2431 | if (err) |
| 2432 | goto out; |
| 2433 | |
| 2434 | if (!run_insert_range(run, vcn, len)) { |
| 2435 | err = -ENOMEM; |
| 2436 | goto out; |
| 2437 | } |
| 2438 | |
| 2439 | /* Try to pack in current record as much as possible. */ |
| 2440 | err = mi_pack_runs(mi, attr, run, evcn1 + len - svcn); |
| 2441 | if (err) |
| 2442 | goto out; |
| 2443 | |
| 2444 | next_svcn = le64_to_cpu(attr->nres.evcn) + 1; |
Konstantin Komarov | aa30ecc | 2022-06-21 12:46:25 +0300 | [diff] [blame] | 2445 | |
| 2446 | while ((attr = ni_enum_attr_ex(ni, attr, &le, &mi)) && |
| 2447 | attr->type == ATTR_DATA && !attr->name_len) { |
| 2448 | le64_add_cpu(&attr->nres.svcn, len); |
| 2449 | le64_add_cpu(&attr->nres.evcn, len); |
| 2450 | if (le) { |
| 2451 | le->vcn = attr->nres.svcn; |
| 2452 | ni->attr_list.dirty = true; |
| 2453 | } |
| 2454 | mi->dirty = true; |
| 2455 | } |
| 2456 | |
Konstantin Komarov | 9256ec3 | 2022-07-13 18:44:24 +0300 | [diff] [blame] | 2457 | if (next_svcn < evcn1 + len) { |
| 2458 | err = ni_insert_nonresident(ni, ATTR_DATA, NULL, 0, run, |
| 2459 | next_svcn, evcn1 + len - next_svcn, |
| 2460 | a_flags, NULL, NULL, NULL); |
| 2461 | |
| 2462 | le_b = NULL; |
| 2463 | attr_b = ni_find_attr(ni, NULL, &le_b, ATTR_DATA, NULL, 0, NULL, |
| 2464 | &mi_b); |
| 2465 | if (!attr_b) { |
| 2466 | err = -EINVAL; |
| 2467 | goto bad_inode; |
| 2468 | } |
| 2469 | |
| 2470 | if (err) { |
| 2471 | /* ni_insert_nonresident failed. Try to undo. */ |
| 2472 | goto undo_insert_range; |
| 2473 | } |
| 2474 | } |
| 2475 | |
Konstantin Komarov | aa30ecc | 2022-06-21 12:46:25 +0300 | [diff] [blame] | 2476 | /* |
Konstantin Komarov | 9256ec3 | 2022-07-13 18:44:24 +0300 | [diff] [blame] | 2477 | * Update primary attribute segment. |
Konstantin Komarov | aa30ecc | 2022-06-21 12:46:25 +0300 | [diff] [blame] | 2478 | */ |
| 2479 | if (vbo <= ni->i_valid) |
| 2480 | ni->i_valid += bytes; |
| 2481 | |
Konstantin Komarov | 9144b43 | 2022-10-06 19:58:11 +0300 | [diff] [blame] | 2482 | attr_b->nres.data_size = cpu_to_le64(data_size + bytes); |
| 2483 | attr_b->nres.alloc_size = cpu_to_le64(alloc_size + bytes); |
Konstantin Komarov | aa30ecc | 2022-06-21 12:46:25 +0300 | [diff] [blame] | 2484 | |
| 2485 | /* ni->valid may be not equal valid_size (temporary). */ |
| 2486 | if (ni->i_valid > data_size + bytes) |
| 2487 | attr_b->nres.valid_size = attr_b->nres.data_size; |
| 2488 | else |
| 2489 | attr_b->nres.valid_size = cpu_to_le64(ni->i_valid); |
| 2490 | mi_b->dirty = true; |
| 2491 | |
Konstantin Komarov | 9256ec3 | 2022-07-13 18:44:24 +0300 | [diff] [blame] | 2492 | done: |
Konstantin Komarov | aa30ecc | 2022-06-21 12:46:25 +0300 | [diff] [blame] | 2493 | ni->vfs_inode.i_size += bytes; |
| 2494 | ni->ni_flags |= NI_FLAG_UPDATE_PARENT; |
| 2495 | mark_inode_dirty(&ni->vfs_inode); |
| 2496 | |
| 2497 | out: |
| 2498 | run_truncate(run, 0); /* clear cached values. */ |
| 2499 | |
| 2500 | up_write(&ni->file.run_lock); |
Konstantin Komarov | aa30ecc | 2022-06-21 12:46:25 +0300 | [diff] [blame] | 2501 | |
| 2502 | return err; |
Konstantin Komarov | 9256ec3 | 2022-07-13 18:44:24 +0300 | [diff] [blame] | 2503 | |
| 2504 | bad_inode: |
| 2505 | _ntfs_bad_inode(&ni->vfs_inode); |
| 2506 | goto out; |
| 2507 | |
| 2508 | undo_insert_range: |
| 2509 | svcn = le64_to_cpu(attr_b->nres.svcn); |
| 2510 | evcn1 = le64_to_cpu(attr_b->nres.evcn) + 1; |
| 2511 | |
| 2512 | if (svcn <= vcn && vcn < evcn1) { |
| 2513 | attr = attr_b; |
| 2514 | le = le_b; |
| 2515 | mi = mi_b; |
| 2516 | } else if (!le_b) { |
| 2517 | goto bad_inode; |
| 2518 | } else { |
| 2519 | le = le_b; |
| 2520 | attr = ni_find_attr(ni, attr_b, &le, ATTR_DATA, NULL, 0, &vcn, |
| 2521 | &mi); |
| 2522 | if (!attr) { |
| 2523 | goto bad_inode; |
| 2524 | } |
| 2525 | |
| 2526 | svcn = le64_to_cpu(attr->nres.svcn); |
| 2527 | evcn1 = le64_to_cpu(attr->nres.evcn) + 1; |
| 2528 | } |
| 2529 | |
| 2530 | if (attr_load_runs(attr, ni, run, NULL)) |
| 2531 | goto bad_inode; |
| 2532 | |
| 2533 | if (!run_collapse_range(run, vcn, len)) |
| 2534 | goto bad_inode; |
| 2535 | |
| 2536 | if (mi_pack_runs(mi, attr, run, evcn1 + len - svcn)) |
| 2537 | goto bad_inode; |
| 2538 | |
| 2539 | while ((attr = ni_enum_attr_ex(ni, attr, &le, &mi)) && |
| 2540 | attr->type == ATTR_DATA && !attr->name_len) { |
| 2541 | le64_sub_cpu(&attr->nres.svcn, len); |
| 2542 | le64_sub_cpu(&attr->nres.evcn, len); |
| 2543 | if (le) { |
| 2544 | le->vcn = attr->nres.svcn; |
| 2545 | ni->attr_list.dirty = true; |
| 2546 | } |
| 2547 | mi->dirty = true; |
| 2548 | } |
| 2549 | |
| 2550 | goto out; |
Konstantin Komarov | aa30ecc | 2022-06-21 12:46:25 +0300 | [diff] [blame] | 2551 | } |