ldiskfs/kernel_patches/patches/ext3-ea-in-inode-2.6-suse.patch

   1 %patch
   2 Index: linux-2.6.0/fs/ext3/ialloc.c
   3 ===================================================================
   4 --- linux-2.6.0.orig/fs/ext3/ialloc.c   2004-01-14 18:54:11.000000000 +0300
   5 +++ linux-2.6.0/fs/ext3/ialloc.c        2004-01-14 18:54:12.000000000 +0300
   6 @@ -627,6 +627,9 @@
   7         inode->i_generation = EXT3_SB(sb)->s_next_generation++;
   8
   9         ei->i_state = EXT3_STATE_NEW;
  10 +       ei->i_extra_isize =
  11 +               (EXT3_INODE_SIZE(inode->i_sb) > EXT3_GOOD_OLD_INODE_SIZE) ?
  12 +               sizeof(struct ext3_inode) - EXT3_GOOD_OLD_INODE_SIZE : 0;
  13
  14         ret = inode;
  15         if(DQUOT_ALLOC_INODE(inode)) {
  16 Index: linux-2.6.0/fs/ext3/inode.c
  17 ===================================================================
  18 --- linux-2.6.0.orig/fs/ext3/inode.c    2004-01-14 18:54:12.000000000 +0300
  19 +++ linux-2.6.0/fs/ext3/inode.c 2004-01-14 19:09:46.000000000 +0300
  20 @@ -2339,7 +2339,7 @@
  21   * trying to determine the inode's location on-disk and no read need be
  22   * performed.
  23   */
  24 -static int ext3_get_inode_loc(struct inode *inode,
  25 +int ext3_get_inode_loc(struct inode *inode,
  26                                 struct ext3_iloc *iloc, int in_mem)
  27  {
  28         unsigned long block;
  29 @@ -2547,6 +2547,11 @@
  30                 ei->i_data[block] = raw_inode->i_block[block];
  31         INIT_LIST_HEAD(&ei->i_orphan);
  32
  33 +       if (EXT3_INODE_SIZE(inode->i_sb) > EXT3_GOOD_OLD_INODE_SIZE)
  34 +               ei->i_extra_isize = le16_to_cpu(raw_inode->i_extra_isize);
  35 +       else
  36 +               ei->i_extra_isize = 0;
  37 +
  38         if (S_ISREG(inode->i_mode)) {
  39                 inode->i_op = &ext3_file_inode_operations;
  40                 inode->i_fop = &ext3_file_operations;
  41 @@ -2682,6 +2687,9 @@
  42         } else for (block = 0; block < EXT3_N_BLOCKS; block++)
  43                 raw_inode->i_block[block] = ei->i_data[block];
  44
  45 +       if (EXT3_INODE_SIZE(inode->i_sb) > EXT3_GOOD_OLD_INODE_SIZE)
  46 +               raw_inode->i_extra_isize = cpu_to_le16(ei->i_extra_isize);
  47 +
  48         BUFFER_TRACE(bh, "call ext3_journal_dirty_metadata");
  49         rc = ext3_journal_dirty_metadata(handle, bh);
  50         if (!err)
  51 @@ -2849,7 +2857,8 @@ ext3_reserve_inode_write(handle_t *handl
  52  {
  53         int err = 0;
  54         if (handle) {
  55 -               err = ext3_get_inode_loc(inode, iloc, 1);
  56 +               err = ext3_get_inode_loc(inode, iloc, EXT3_I(inode)->i_state &
  57 +                                                       EXT3_STATE_NEW);
  58                 if (!err) {
  59                         BUFFER_TRACE(iloc->bh, "get_write_access");
  60                         err = ext3_journal_get_write_access(handle, iloc->bh);
  61 Index: linux-2.6.0/fs/ext3/xattr.c
  62 ===================================================================
  63 --- linux-2.6.0.orig/fs/ext3/xattr.c    2003-12-30 08:33:13.000000000 +0300
  64 +++ linux-2.6.0/fs/ext3/xattr.c 2004-01-14 18:54:12.000000000 +0300
  65 @@ -246,17 +246,12 @@
  66  }
  67
  68  /*
  69 - * ext3_xattr_get()
  70 - *
  71 - * Copy an extended attribute into the buffer
  72 - * provided, or compute the buffer size required.
  73 - * Buffer is NULL to compute the size of the buffer required.
  74 + * ext3_xattr_block_get()
  75   *
  76 - * Returns a negative error number on failure, or the number of bytes
  77 - * used / required on success.
  78 + * routine looks for attribute in EA block and returns it's value and size
  79   */
  80  int
  81 -ext3_xattr_get(struct inode *inode, int name_index, const char *name,
  82 +ext3_xattr_block_get(struct inode *inode, int name_index, const char *name,
  83                void *buffer, size_t buffer_size)
  84  {
  85         struct buffer_head *bh = NULL;
  86 @@ -270,7 +265,6 @@
  87
  88         if (name == NULL)
  89                 return -EINVAL;
  90 -       down_read(&EXT3_I(inode)->xattr_sem);
  91         error = -ENODATA;
  92         if (!EXT3_I(inode)->i_file_acl)
  93                 goto cleanup;
  94 @@ -343,15 +337,87 @@
  95
  96  cleanup:
  97         brelse(bh);
  98 -       up_read(&EXT3_I(inode)->xattr_sem);
  99
 100         return error;
 101  }
 102
 103  /*
 104 - * ext3_xattr_list()
 105 + * ext3_xattr_ibody_get()
 106   *
 107 - * Copy a list of attribute names into the buffer
 108 + * routine looks for attribute in inode body and returns it's value and size
 109 + */
 110 +int
 111 +ext3_xattr_ibody_get(struct inode *inode, int name_index, const char *name,
 112 +              void *buffer, size_t buffer_size)
 113 +{
 114 +       int size, name_len = strlen(name), storage_size;
 115 +       struct ext3_xattr_entry *last;
 116 +       struct ext3_inode *raw_inode;
 117 +       struct ext3_iloc iloc;
 118 +       char *start, *end;
 119 +       int ret = -ENOENT;
 120 +
 121 +       if (EXT3_SB(inode->i_sb)->s_inode_size <= EXT3_GOOD_OLD_INODE_SIZE)
 122 +               return -ENOENT;
 123 +
 124 +       ret = ext3_get_inode_loc(inode, &iloc, 0);
 125 +       if (ret)
 126 +               return ret;
 127 +       raw_inode = ext3_raw_inode(&iloc);
 128 +
 129 +       storage_size = EXT3_SB(inode->i_sb)->s_inode_size -
 130 +                               EXT3_GOOD_OLD_INODE_SIZE -
 131 +                               EXT3_I(inode)->i_extra_isize -
 132 +                               sizeof(__u32);
 133 +       start = (char *) raw_inode + EXT3_GOOD_OLD_INODE_SIZE +
 134 +                       EXT3_I(inode)->i_extra_isize;
 135 +       if (le32_to_cpu((*(__u32*) start)) != EXT3_XATTR_MAGIC) {
 136 +               brelse(iloc.bh);
 137 +               return -ENOENT;
 138 +       }
 139 +       start += sizeof(__u32);
 140 +       end = (char *) raw_inode + EXT3_SB(inode->i_sb)->s_inode_size;
 141 +
 142 +       last = (struct ext3_xattr_entry *) start;
 143 +       while (!IS_LAST_ENTRY(last)) {
 144 +               struct ext3_xattr_entry *next = EXT3_XATTR_NEXT(last);
 145 +               if (le32_to_cpu(last->e_value_size) > storage_size ||
 146 +                               (char *) next >= end) {
 147 +                       ext3_error(inode->i_sb, "ext3_xattr_ibody_get",
 148 +                               "inode %ld", inode->i_ino);
 149 +                       brelse(iloc.bh);
 150 +                       return -EIO;
 151 +               }
 152 +               if (name_index == last->e_name_index &&
 153 +                   name_len == last->e_name_len &&
 154 +                   !memcmp(name, last->e_name, name_len))
 155 +                       goto found;
 156 +               last = next;
 157 +       }
 158 +
 159 +       /* can't find EA */
 160 +       brelse(iloc.bh);
 161 +       return -ENOENT;
 162 +
 163 +found:
 164 +       size = le32_to_cpu(last->e_value_size);
 165 +       if (buffer) {
 166 +               ret = -ERANGE;
 167 +               if (buffer_size >= size) {
 168 +                       memcpy(buffer, start + le16_to_cpu(last->e_value_offs),
 169 +                               size);
 170 +                       ret = size;
 171 +               }
 172 +       } else
 173 +               ret = size;
 174 +       brelse(iloc.bh);
 175 +       return ret;
 176 +}
 177 +
 178 +/*
 179 + * ext3_xattr_get()
 180 + *
 181 + * Copy an extended attribute into the buffer
 182   * provided, or compute the buffer size required.
 183   * Buffer is NULL to compute the size of the buffer required.
 184   *
 185 @@ -359,7 +425,31 @@
 186   * used / required on success.
 187   */
 188  int
 189 -ext3_xattr_list(struct inode *inode, char *buffer, size_t buffer_size)
 190 +ext3_xattr_get(struct inode *inode, int name_index, const char *name,
 191 +              void *buffer, size_t buffer_size)
 192 +{
 193 +       int err;
 194 +
 195 +       down_read(&EXT3_I(inode)->xattr_sem);
 196 +
 197 +       /* try to find attribute in inode body */
 198 +       err = ext3_xattr_ibody_get(inode, name_index, name,
 199 +                                       buffer, buffer_size);
 200 +       if (err < 0)
 201 +               /* search was unsuccessful, try to find EA in dedicated block */
 202 +               err = ext3_xattr_block_get(inode, name_index, name,
 203 +                               buffer, buffer_size);
 204 +       up_read(&EXT3_I(inode)->xattr_sem);
 205 +
 206 +       return err;
 207 +}
 208 +
 209 +/* ext3_xattr_ibody_list()
 210 + *
 211 + * generate list of attributes stored in EA block
 212 + */
 213 +int
 214 +ext3_xattr_block_list(struct inode *inode, char *buffer, size_t buffer_size)
 215  {
 216         struct buffer_head *bh = NULL;
 217         struct ext3_xattr_entry *entry;
 218 @@ -370,7 +460,6 @@
 219         ea_idebug(inode, "buffer=%p, buffer_size=%ld",
 220                   buffer, (long)buffer_size);
 221
 222 -       down_read(&EXT3_I(inode)->xattr_sem);
 223         error = 0;
 224         if (!EXT3_I(inode)->i_file_acl)
 225                 goto cleanup;
 226 @@ -431,11 +520,138 @@
 227
 228  cleanup:
 229         brelse(bh);
 230 -       up_read(&EXT3_I(inode)->xattr_sem);
 231
 232         return error;
 233  }
 234
 235 +/* ext3_xattr_ibody_list()
 236 + *
 237 + * generate list of attributes stored in inode body
 238 + */
 239 +int
 240 +ext3_xattr_ibody_list(struct inode *inode, char *buffer, size_t buffer_size)
 241 +{
 242 +       struct ext3_xattr_entry *last;
 243 +       struct ext3_inode *raw_inode;
 244 +       char *start, *end, *buf;
 245 +       struct ext3_iloc iloc;
 246 +       int storage_size;
 247 +       int ret;
 248 +       int size = 0;
 249 +
 250 +       if (EXT3_SB(inode->i_sb)->s_inode_size <= EXT3_GOOD_OLD_INODE_SIZE)
 251 +               return 0;
 252 +
 253 +       ret = ext3_get_inode_loc(inode, &iloc, 0);
 254 +       if (ret)
 255 +               return ret;
 256 +       raw_inode = ext3_raw_inode(&iloc);
 257 +
 258 +       storage_size = EXT3_SB(inode->i_sb)->s_inode_size -
 259 +                               EXT3_GOOD_OLD_INODE_SIZE -
 260 +                               EXT3_I(inode)->i_extra_isize -
 261 +                               sizeof(__u32);
 262 +       start = (char *) raw_inode + EXT3_GOOD_OLD_INODE_SIZE +
 263 +                       EXT3_I(inode)->i_extra_isize;
 264 +       if (le32_to_cpu((*(__u32*) start)) != EXT3_XATTR_MAGIC) {
 265 +               brelse(iloc.bh);
 266 +               return 0;
 267 +       }
 268 +       start += sizeof(__u32);
 269 +       end = (char *) raw_inode + EXT3_SB(inode->i_sb)->s_inode_size;
 270 +
 271 +       last = (struct ext3_xattr_entry *) start;
 272 +       while (!IS_LAST_ENTRY(last)) {
 273 +               struct ext3_xattr_entry *next = EXT3_XATTR_NEXT(last);
 274 +               struct ext3_xattr_handler *handler;
 275 +               if (le32_to_cpu(last->e_value_size) > storage_size ||
 276 +                               (char *) next >= end) {
 277 +                       ext3_error(inode->i_sb, "ext3_xattr_ibody_list",
 278 +                               "inode %ld", inode->i_ino);
 279 +                       brelse(iloc.bh);
 280 +                       return -EIO;
 281 +               }
 282 +               handler = ext3_xattr_handler(last->e_name_index);
 283 +               if (handler)
 284 +                       size += handler->list(NULL, inode, last->e_name,
 285 +                                             last->e_name_len);
 286 +               last = next;
 287 +       }
 288 +
 289 +       if (!buffer) {
 290 +               ret = size;
 291 +               goto cleanup;
 292 +       } else {
 293 +               ret = -ERANGE;
 294 +               if (size > buffer_size)
 295 +                       goto cleanup;
 296 +       }
 297 +
 298 +       last = (struct ext3_xattr_entry *) start;
 299 +       buf = buffer;
 300 +       while (!IS_LAST_ENTRY(last)) {
 301 +               struct ext3_xattr_entry *next = EXT3_XATTR_NEXT(last);
 302 +               struct ext3_xattr_handler *handler;
 303 +               handler = ext3_xattr_handler(last->e_name_index);
 304 +               if (handler)
 305 +                       buf += handler->list(buf, inode, last->e_name,
 306 +                                             last->e_name_len);
 307 +               last = next;
 308 +       }
 309 +       ret = size;
 310 +cleanup:
 311 +       brelse(iloc.bh);
 312 +       return ret;
 313 +}
 314 +
 315 +/*
 316 + * ext3_xattr_list()
 317 + *
 318 + * Copy a list of attribute names into the buffer
 319 + * provided, or compute the buffer size required.
 320 + * Buffer is NULL to compute the size of the buffer required.
 321 + *
 322 + * Returns a negative error number on failure, or the number of bytes
 323 + * used / required on success.
 324 + */
 325 +int
 326 +ext3_xattr_list(struct inode *inode, char *buffer, size_t buffer_size)
 327 +{
 328 +       int error;
 329 +       int size = buffer_size;
 330 +
 331 +       down_read(&EXT3_I(inode)->xattr_sem);
 332 +
 333 +       /* get list of attributes stored in inode body */
 334 +       error = ext3_xattr_ibody_list(inode, buffer, buffer_size);
 335 +       if (error < 0) {
 336 +               /* some error occured while collecting
 337 +                * attributes in inode body */
 338 +               size = 0;
 339 +               goto cleanup;
 340 +       }
 341 +       size = error;
 342 +
 343 +       /* get list of attributes stored in dedicated block */
 344 +       if (buffer) {
 345 +               buffer_size -= error;
 346 +               if (buffer_size <= 0) {
 347 +                       buffer = NULL;
 348 +                       buffer_size = 0;
 349 +               } else
 350 +                       buffer += error;
 351 +       }
 352 +
 353 +       error = ext3_xattr_block_list(inode, buffer, buffer_size);
 354 +       if (error < 0)
 355 +               /* listing was successful, so we return len */
 356 +               size = 0;
 357 +
 358 +cleanup:
 359 +       up_read(&EXT3_I(inode)->xattr_sem);
 360 +       return error + size;
 361 +}
 362 +
 363  /*
 364   * If the EXT3_FEATURE_COMPAT_EXT_ATTR feature of this file system is
 365   * not set, set it.
 366 @@ -457,6 +673,279 @@
 367  }
 368
 369  /*
 370 + * ext3_xattr_ibody_find()
 371 + *
 372 + * search attribute and calculate free space in inode body
 373 + * NOTE: free space includes space our attribute hold
 374 + */
 375 +int
 376 +ext3_xattr_ibody_find(struct inode *inode, int name_index,
 377 +               const char *name, struct ext3_xattr_entry *rentry, int *free)
 378 +{
 379 +       struct ext3_xattr_entry *last;
 380 +       struct ext3_inode *raw_inode;
 381 +       int name_len = strlen(name);
 382 +       int err, storage_size;
 383 +       struct ext3_iloc iloc;
 384 +       char *start, *end;
 385 +       int ret = -ENOENT;
 386 +
 387 +       if (EXT3_SB(inode->i_sb)->s_inode_size <= EXT3_GOOD_OLD_INODE_SIZE)
 388 +               return ret;
 389 +
 390 +       err = ext3_get_inode_loc(inode, &iloc, 0);
 391 +       if (err)
 392 +               return -EIO;
 393 +       raw_inode = ext3_raw_inode(&iloc);
 394 +
 395 +       storage_size = EXT3_SB(inode->i_sb)->s_inode_size -
 396 +                               EXT3_GOOD_OLD_INODE_SIZE -
 397 +                               EXT3_I(inode)->i_extra_isize -
 398 +                               sizeof(__u32);
 399 +       *free = storage_size - sizeof(__u32);
 400 +       start = (char *) raw_inode + EXT3_GOOD_OLD_INODE_SIZE +
 401 +                       EXT3_I(inode)->i_extra_isize;
 402 +       if (le32_to_cpu((*(__u32*) start)) != EXT3_XATTR_MAGIC) {
 403 +               brelse(iloc.bh);
 404 +               return -ENOENT;
 405 +       }
 406 +       start += sizeof(__u32);
 407 +       end = (char *) raw_inode + EXT3_SB(inode->i_sb)->s_inode_size;
 408 +
 409 +       last = (struct ext3_xattr_entry *) start;
 410 +       while (!IS_LAST_ENTRY(last)) {
 411 +               struct ext3_xattr_entry *next = EXT3_XATTR_NEXT(last);
 412 +               if (le32_to_cpu(last->e_value_size) > storage_size ||
 413 +                               (char *) next >= end) {
 414 +                       ext3_error(inode->i_sb, "ext3_xattr_ibody_find",
 415 +                               "inode %ld", inode->i_ino);
 416 +                       brelse(iloc.bh);
 417 +                       return -EIO;
 418 +               }
 419 +
 420 +               if (name_index == last->e_name_index &&
 421 +                   name_len == last->e_name_len &&
 422 +                   !memcmp(name, last->e_name, name_len)) {
 423 +                       memcpy(rentry, last, sizeof(struct ext3_xattr_entry));
 424 +                       ret = 0;
 425 +               } else {
 426 +                       *free -= EXT3_XATTR_LEN(last->e_name_len);
 427 +                       *free -= le32_to_cpu(last->e_value_size);
 428 +               }
 429 +               last = next;
 430 +       }
 431 +
 432 +       brelse(iloc.bh);
 433 +       return ret;
 434 +}
 435 +
 436 +/*
 437 + * ext3_xattr_block_find()
 438 + *
 439 + * search attribute and calculate free space in EA block (if it allocated)
 440 + * NOTE: free space includes space our attribute hold
 441 + */
 442 +int
 443 +ext3_xattr_block_find(struct inode *inode, int name_index, const char *name,
 444 +              struct ext3_xattr_entry *rentry, int *free)
 445 +{
 446 +       struct buffer_head *bh = NULL;
 447 +       struct ext3_xattr_entry *entry;
 448 +       char *end;
 449 +       int name_len, error = -ENOENT;
 450 +
 451 +       if (!EXT3_I(inode)->i_file_acl) {
 452 +               *free = inode->i_sb->s_blocksize -
 453 +                       sizeof(struct ext3_xattr_header) -
 454 +                       sizeof(__u32);
 455 +               return -ENOENT;
 456 +       }
 457 +       ea_idebug(inode, "reading block %d", EXT3_I(inode)->i_file_acl);
 458 +       bh = sb_bread(inode->i_sb, EXT3_I(inode)->i_file_acl);
 459 +       if (!bh)
 460 +               return -EIO;
 461 +       ea_bdebug(bh, "b_count=%d, refcount=%d",
 462 +               atomic_read(&(bh->b_count)), le32_to_cpu(HDR(bh)->h_refcount));
 463 +       end = bh->b_data + bh->b_size;
 464 +       if (HDR(bh)->h_magic != cpu_to_le32(EXT3_XATTR_MAGIC) ||
 465 +           HDR(bh)->h_blocks != cpu_to_le32(1)) {
 466 +bad_block:     ext3_error(inode->i_sb, "ext3_xattr_get",
 467 +                       "inode %ld: bad block %d", inode->i_ino,
 468 +                       EXT3_I(inode)->i_file_acl);
 469 +               brelse(bh);
 470 +               return -EIO;
 471 +       }
 472 +       /* find named attribute */
 473 +       name_len = strlen(name);
 474 +       *free = bh->b_size - sizeof(__u32);
 475 +
 476 +       entry = FIRST_ENTRY(bh);
 477 +       while (!IS_LAST_ENTRY(entry)) {
 478 +               struct ext3_xattr_entry *next =
 479 +                       EXT3_XATTR_NEXT(entry);
 480 +               if ((char *)next >= end)
 481 +                       goto bad_block;
 482 +               if (name_index == entry->e_name_index &&
 483 +                   name_len == entry->e_name_len &&
 484 +                   memcmp(name, entry->e_name, name_len) == 0) {
 485 +                       memcpy(rentry, entry, sizeof(struct ext3_xattr_entry));
 486 +                       error = 0;
 487 +               } else {
 488 +                       *free -= EXT3_XATTR_LEN(entry->e_name_len);
 489 +                       *free -= le32_to_cpu(entry->e_value_size);
 490 +               }
 491 +               entry = next;
 492 +       }
 493 +       brelse(bh);
 494 +
 495 +       return error;
 496 +}
 497 +
 498 +/*
 499 + * ext3_xattr_inode_set()
 500 + *
 501 + * this routine add/remove/replace attribute in inode body
 502 + */
 503 +int
 504 +ext3_xattr_ibody_set(handle_t *handle, struct inode *inode, int name_index,
 505 +                     const char *name, const void *value, size_t value_len,
 506 +                     int flags)
 507 +{
 508 +       struct ext3_xattr_entry *last, *next, *here = NULL;
 509 +       struct ext3_inode *raw_inode;
 510 +       int name_len = strlen(name);
 511 +       int esize = EXT3_XATTR_LEN(name_len);
 512 +       struct buffer_head *bh;
 513 +       int err, storage_size;
 514 +       struct ext3_iloc iloc;
 515 +       int free, min_offs;
 516 +       char *start, *end;
 517 +
 518 +       if (EXT3_SB(inode->i_sb)->s_inode_size <= EXT3_GOOD_OLD_INODE_SIZE)
 519 +               return -ENOSPC;
 520 +
 521 +       err = ext3_get_inode_loc(inode, &iloc, 0);
 522 +       if (err)
 523 +               return err;
 524 +       raw_inode = ext3_raw_inode(&iloc);
 525 +       bh = iloc.bh;
 526 +
 527 +       storage_size = EXT3_SB(inode->i_sb)->s_inode_size -
 528 +                               EXT3_GOOD_OLD_INODE_SIZE -
 529 +                               EXT3_I(inode)->i_extra_isize -
 530 +                               sizeof(__u32);
 531 +       start = (char *) raw_inode + EXT3_GOOD_OLD_INODE_SIZE +
 532 +                       EXT3_I(inode)->i_extra_isize;
 533 +       if ((*(__u32*) start) != EXT3_XATTR_MAGIC) {
 534 +               /* inode had no attributes before */
 535 +               *((__u32*) start) = cpu_to_le32(EXT3_XATTR_MAGIC);
 536 +       }
 537 +       start += sizeof(__u32);
 538 +       end = (char *) raw_inode + EXT3_SB(inode->i_sb)->s_inode_size;
 539 +       min_offs = storage_size;
 540 +       free = storage_size - sizeof(__u32);
 541 +
 542 +       last = (struct ext3_xattr_entry *) start;
 543 +       while (!IS_LAST_ENTRY(last)) {
 544 +               next = EXT3_XATTR_NEXT(last);
 545 +               if (le32_to_cpu(last->e_value_size) > storage_size ||
 546 +                               (char *) next >= end) {
 547 +                       ext3_error(inode->i_sb, "ext3_xattr_ibody_set",
 548 +                               "inode %ld", inode->i_ino);
 549 +                       brelse(bh);
 550 +                       return -EIO;
 551 +               }
 552 +
 553 +               if (last->e_value_size) {
 554 +                       int offs = le16_to_cpu(last->e_value_offs);
 555 +                       if (offs < min_offs)
 556 +                               min_offs = offs;
 557 +               }
 558 +               if (name_index == last->e_name_index &&
 559 +                       name_len == last->e_name_len &&
 560 +                       !memcmp(name, last->e_name, name_len))
 561 +                       here = last;
 562 +               else {
 563 +                       /* we calculate all but our attribute
 564 +                        * because it will be removed before changing */
 565 +                       free -= EXT3_XATTR_LEN(last->e_name_len);
 566 +                       free -= le32_to_cpu(last->e_value_size);
 567 +               }
 568 +               last = next;
 569 +       }
 570 +
 571 +       if (value && (esize + value_len > free)) {
 572 +               brelse(bh);
 573 +               return -ENOSPC;
 574 +       }
 575 +
 576 +       err = ext3_reserve_inode_write(handle, inode, &iloc);
 577 +       if (err) {
 578 +               brelse(bh);
 579 +               return err;
 580 +       }
 581 +
 582 +       if (here) {
 583 +               /* time to remove old value */
 584 +               struct ext3_xattr_entry *e;
 585 +               int size = le32_to_cpu(here->e_value_size);
 586 +               int border = le16_to_cpu(here->e_value_offs);
 587 +               char *src;
 588 +
 589 +               /* move tail */
 590 +               memmove(start + min_offs + size, start + min_offs,
 591 +                               border - min_offs);
 592 +
 593 +               /* recalculate offsets */
 594 +               e = (struct ext3_xattr_entry *) start;
 595 +               while (!IS_LAST_ENTRY(e)) {
 596 +                       struct ext3_xattr_entry *next = EXT3_XATTR_NEXT(e);
 597 +                       int offs = le16_to_cpu(e->e_value_offs);
 598 +                       if (offs < border)
 599 +                               e->e_value_offs =
 600 +                                       cpu_to_le16(offs + size);
 601 +                       e = next;
 602 +               }
 603 +               min_offs += size;
 604 +
 605 +               /* remove entry */
 606 +               border = EXT3_XATTR_LEN(here->e_name_len);
 607 +               src = (char *) here + EXT3_XATTR_LEN(here->e_name_len);
 608 +               size = (char *) last - src;
 609 +               if ((char *) here + size > end)
 610 +                       printk("ALERT at %s:%d: 0x%p + %d > 0x%p\n",
 611 +                                       __FILE__, __LINE__, here, size, end);
 612 +               memmove(here, src, size);
 613 +               last = (struct ext3_xattr_entry *) ((char *) last - border);
 614 +               *((__u32 *) last) = 0;
 615 +       }
 616 +
 617 +       if (value) {
 618 +               int offs = min_offs - value_len;
 619 +               /* use last to create new entry */
 620 +               last->e_name_len = strlen(name);
 621 +               last->e_name_index = name_index;
 622 +               last->e_value_offs = cpu_to_le16(offs);
 623 +               last->e_value_size = cpu_to_le32(value_len);
 624 +               last->e_hash = last->e_value_block = 0;
 625 +               memset(last->e_name, 0, esize);
 626 +               memcpy(last->e_name, name, last->e_name_len);
 627 +               if (start + offs + value_len > end)
 628 +                       printk("ALERT at %s:%d: 0x%p + %d + %zd > 0x%p\n",
 629 +                              __FILE__, __LINE__, start, offs,
 630 +                              value_len, end);
 631 +               memcpy(start + offs, value, value_len);
 632 +               last = EXT3_XATTR_NEXT(last);
 633 +               *((__u32 *) last) = 0;
 634 +       }
 635 +
 636 +       ext3_mark_iloc_dirty(handle, inode, &iloc);
 637 +       brelse(bh);
 638 +
 639 +       return 0;
 640 +}
 641 +
 642 +/*
 643   * ext3_xattr_set_handle()
 644   *
 645   * Create, replace or remove an extended attribute for this inode. Buffer
 646 @@ -470,6 +959,104 @@
 647   */
 648  int
 649  ext3_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
 650 +               const char *name, const void *value, size_t value_len,
 651 +               int flags)
 652 +{
 653 +       struct ext3_xattr_entry entry;
 654 +       int err, where = 0, found = 0, total;
 655 +       int free1 = -1, free2 = -1;
 656 +       int name_len;
 657 +
 658 +       ea_idebug(inode, "name=%d.%s, value=%p, value_len=%ld",
 659 +                 name_index, name, value, (long)value_len);
 660 +
 661 +       if (IS_RDONLY(inode))
 662 +               return -EROFS;
 663 +       if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
 664 +               return -EPERM;
 665 +       if (value == NULL)
 666 +               value_len = 0;
 667 +       if (name == NULL)
 668 +               return -EINVAL;
 669 +       name_len = strlen(name);
 670 +       if (name_len > 255 || value_len > inode->i_sb->s_blocksize)
 671 +               return -ERANGE;
 672 +       down_write(&EXT3_I(inode)->xattr_sem);
 673 +
 674 +       /* try to find attribute in inode body */
 675 +       err = ext3_xattr_ibody_find(inode, name_index, name, &entry, &free1);
 676 +       if (err == 0) {
 677 +               /* found EA in inode */
 678 +               found = 1;
 679 +               where = 0;
 680 +       } else if (err == -ENOENT) {
 681 +               /* there is no such attribute in inode body */
 682 +               /* try to find attribute in dedicated block */
 683 +               err = ext3_xattr_block_find(inode, name_index, name,
 684 +                                               &entry, &free2);
 685 +               if (err != 0 && err != -ENOENT) {
 686 +                       /* not found EA in block */
 687 +                       goto finish;
 688 +               } else if (err == 0) {
 689 +                       /* found EA in block */
 690 +                       where = 1;
 691 +                       found = 1;
 692 +               }
 693 +       } else
 694 +               goto finish;
 695 +
 696 +       /* check flags: may replace? may create ? */
 697 +       if (found && (flags & XATTR_CREATE)) {
 698 +               err = -EEXIST;
 699 +               goto finish;
 700 +       } else if (!found && (flags & XATTR_REPLACE)) {
 701 +               err = -ENODATA;
 702 +               goto finish;
 703 +       }
 704 +
 705 +       /* check if we have enough space to store attribute */
 706 +       total = EXT3_XATTR_LEN(strlen(name)) + value_len;
 707 +       if (free1 >= 0 && total > free1 && free2 >= 0 && total > free2) {
 708 +               /* have no enough space */
 709 +               err = -ENOSPC;
 710 +               goto finish;
 711 +       }
 712 +
 713 +       /* time to remove attribute */
 714 +       if (found) {
 715 +               if (where == 0) {
 716 +                       /* EA is stored in inode body */
 717 +                       ext3_xattr_ibody_set(handle, inode, name_index, name,
 718 +                                       NULL, 0, flags);
 719 +               } else {
 720 +                       /* EA is stored in separated block */
 721 +                       ext3_xattr_block_set(handle, inode, name_index, name,
 722 +                                       NULL, 0, flags);
 723 +               }
 724 +       }
 725 +
 726 +       /* try to store EA in inode body */
 727 +       err = ext3_xattr_ibody_set(handle, inode, name_index, name,
 728 +                               value, value_len, flags);
 729 +       if (err) {
 730 +               /* can't store EA in inode body */
 731 +               /* try to store in block */
 732 +               err = ext3_xattr_block_set(handle, inode, name_index,
 733 +                                       name, value, value_len, flags);
 734 +       }
 735 +
 736 +finish:
 737 +       up_write(&EXT3_I(inode)->xattr_sem);
 738 +       return err;
 739 +}
 740 +
 741 +/*
 742 + * ext3_xattr_block_set()
 743 + *
 744 + * this routine add/remove/replace attribute in EA block
 745 + */
 746 +int
 747 +ext3_xattr_block_set(handle_t *handle, struct inode *inode, int name_index,
 748                       const char *name, const void *value, size_t value_len,
 749                       int flags)
 750  {
 751 @@ -492,22 +1078,7 @@
 752          *             towards the end of the block).
 753          * end -- Points right after the block pointed to by header.
 754          */
 755 -
 756 -       ea_idebug(inode, "name=%d.%s, value=%p, value_len=%ld",
 757 -                 name_index, name, value, (long)value_len);
 758 -
 759 -       if (IS_RDONLY(inode))
 760 -               return -EROFS;
 761 -       if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
 762 -               return -EPERM;
 763 -       if (value == NULL)
 764 -               value_len = 0;
 765 -       if (name == NULL)
 766 -               return -EINVAL;
 767         name_len = strlen(name);
 768 -       if (name_len > 255 || value_len > sb->s_blocksize)
 769 -               return -ERANGE;
 770 -       down_write(&EXT3_I(inode)->xattr_sem);
 771         if (EXT3_I(inode)->i_file_acl) {
 772                 /* The inode already has an extended attribute block. */
 773                 bh = sb_bread(sb, EXT3_I(inode)->i_file_acl);
 774 @@ -733,7 +1304,6 @@
 775         brelse(bh);
 776         if (!(bh && header == HDR(bh)))
 777                 kfree(header);
 778 -       up_write(&EXT3_I(inode)->xattr_sem);
 779
 780         return error;
 781  }
 782 Index: linux-2.6.0/fs/ext3/xattr.h
 783 ===================================================================
 784 --- linux-2.6.0.orig/fs/ext3/xattr.h    2003-06-24 18:04:43.000000000 +0400
 785 +++ linux-2.6.0/fs/ext3/xattr.h 2004-01-14 18:54:12.000000000 +0300
 786 @@ -77,7 +77,8 @@
 787  extern int ext3_xattr_get(struct inode *, int, const char *, void *, size_t);
 788  extern int ext3_xattr_list(struct inode *, char *, size_t);
 789  extern int ext3_xattr_set(struct inode *, int, const char *, const void *, size_t, int);
 790 -extern int ext3_xattr_set_handle(handle_t *, struct inode *, int, const char *, const void *, size_t, int);
 791 +extern int ext3_xattr_set_handle(handle_t *, struct inode *, int, const char *,const void *,size_t,int);
 792 +extern int ext3_xattr_block_set(handle_t *, struct inode *, int, const char *,const void *,size_t,int);
 793
 794  extern void ext3_xattr_delete_inode(handle_t *, struct inode *);
 795  extern void ext3_xattr_put_super(struct super_block *);
 796 Index: linux-2.6.0/include/linux/ext3_fs.h
 797 ===================================================================
 798 --- linux-2.6.0.orig/include/linux/ext3_fs.h    2004-01-14 18:54:11.000000000 +0300
 799 +++ linux-2.6.0/include/linux/ext3_fs.h 2004-01-14 18:54:12.000000000 +0300
 800 @@ -265,6 +265,8 @@
 801                         __u32   m_i_reserved2[2];
 802                 } masix2;
 803         } osd2;                         /* OS dependent 2 */
 804 +       __u16   i_extra_isize;
 805 +       __u16   i_pad1;
 806  };
 807
 808  #define i_size_high    i_dir_acl
 809 @@ -721,6 +723,7 @@
 810  extern int ext3_forget(handle_t *, int, struct inode *, struct buffer_head *, int);
 811  extern struct buffer_head * ext3_getblk (handle_t *, struct inode *, long, int, int *);
 812  extern struct buffer_head * ext3_bread (handle_t *, struct inode *, int, int, int *);
 813 +int ext3_get_inode_loc(struct inode *inode, struct ext3_iloc *iloc, int in_mem);
 814
 815  extern void ext3_read_inode (struct inode *);
 816  extern void ext3_write_inode (struct inode *, int);
 817 Index: linux-2.6.0/include/linux/ext3_fs_i.h
 818 ===================================================================
 819 --- linux-2.6.0.orig/include/linux/ext3_fs_i.h  2003-12-30 08:32:44.000000000 +0300
 820 +++ linux-2.6.0/include/linux/ext3_fs_i.h       2004-01-14 18:54:12.000000000 +0300
 821 @@ -96,6 +96,9 @@
 822          */
 823         loff_t  i_disksize;
 824
 825 +       /* on-disk additional length */
 826 +       __u16 i_extra_isize;
 827 +
 828         /*
 829          * truncate_sem is for serialising ext3_truncate() against
 830          * ext3_getblock().  In the 2.4 ext2 design, great chunks of inode's
 831
 832 %diffstat
 833  fs/ext3/ialloc.c          |    5
 834  fs/ext3/inode.c           |   10
 835  fs/ext3/xattr.c           |  634 +++++++++++++++++++++++++++++++++++++++++++---
 836  fs/ext3/xattr.h           |    3
 837  include/linux/ext3_fs.h   |    2
 838  include/linux/ext3_fs_i.h |    3
 839  6 files changed, 623 insertions(+), 34 deletions(-)
 840