ldiskfs/kernel_patches/patches/ext3-inode-version-2.6.18-vanilla.patch

   1 Index: linux-2.6.18/fs/ext3/inode.c
   2 ===================================================================
   3 --- linux-2.6.18.orig/fs/ext3/inode.c
   4 +++ linux-2.6.18/fs/ext3/inode.c
   5 @@ -2703,6 +2703,13 @@ void ext3_read_inode(struct inode * inod
   6         EXT3_INODE_GET_XTIME(i_atime, inode, raw_inode);
   7         EXT3_EINODE_GET_XTIME(i_crtime, ei, raw_inode);
   8
   9 +       ei->i_fs_version = le32_to_cpu(raw_inode->i_disk_version);
  10 +       if (EXT3_INODE_SIZE(inode->i_sb) > EXT3_GOOD_OLD_INODE_SIZE) {
  11 +               if (EXT3_FITS_IN_INODE(raw_inode, ei, i_version_hi))
  12 +                       ei->i_fs_version |= (__u64)(le32_to_cpu(raw_inode->i_version_hi))
  13 +                                                                        << 32;
  14 +       }
  15 +
  16         if (S_ISREG(inode->i_mode)) {
  17                 inode->i_op = &ext3_file_inode_operations;
  18                 inode->i_fop = &ext3_file_operations;
  19 @@ -2841,8 +2848,14 @@ static int ext3_do_update_inode(handle_t
  20         } else for (block = 0; block < EXT3_N_BLOCKS; block++)
  21                 raw_inode->i_block[block] = ei->i_data[block];
  22
  23 -       if (ei->i_extra_isize)
  24 +       raw_inode->i_disk_version = cpu_to_le32(ei->i_fs_version);
  25 +       if (ei->i_extra_isize) {
  26 +               if (EXT3_FITS_IN_INODE(raw_inode, ei, i_version_hi)) {
  27 +                       raw_inode->i_version_hi = cpu_to_le32(ei->i_fs_version
  28 +                                                                       >> 32);
  29 +               }
  30                 raw_inode->i_extra_isize = cpu_to_le16(ei->i_extra_isize);
  31 +       }
  32
  33         BUFFER_TRACE(bh, "call ext3_journal_dirty_metadata");
  34         rc = ext3_journal_dirty_metadata(handle, bh);
  35 @@ -3116,10 +3129,32 @@ ext3_reserve_inode_write(handle_t *handl
  36  int ext3_mark_inode_dirty(handle_t *handle, struct inode *inode)
  37  {
  38         struct ext3_iloc iloc;
  39 -       int err;
  40 +       int err, ret;
  41 +       static int expand_message;
  42
  43         might_sleep();
  44         err = ext3_reserve_inode_write(handle, inode, &iloc);
  45 +       if (EXT3_I(inode)->i_extra_isize <
  46 +           EXT3_SB(inode->i_sb)->s_want_extra_isize &&
  47 +           !(EXT3_I(inode)->i_state & EXT3_STATE_NO_EXPAND)) {
  48 +               /* We need extra buffer credits since we may write into EA block
  49 +                * with this same handle */
  50 +               if ((ext3_journal_extend(handle,
  51 +                            EXT3_DATA_TRANS_BLOCKS(inode->i_sb))) == 0) {
  52 +                       ret = ext3_expand_extra_isize(inode,
  53 +                                       EXT3_SB(inode->i_sb)->s_want_extra_isize,
  54 +                                       iloc, handle);
  55 +                       if (ret) {
  56 +                               EXT3_I(inode)->i_state |= EXT3_STATE_NO_EXPAND;
  57 +                               if (!expand_message) {
  58 +                                       ext3_warning(inode->i_sb, __FUNCTION__,
  59 +                                       "Unable to expand inode %lu. Delete some"
  60 +                                       " EAs or run e2fsck.", inode->i_ino);
  61 +                                       expand_message = 1;
  62 +                               }
  63 +                       }
  64 +               }
  65 +       }
  66         if (!err)
  67                 err = ext3_mark_iloc_dirty(handle, inode, &iloc);
  68         return err;
  69 Index: linux-2.6.18/include/linux/ext3_fs.h
  70 ===================================================================
  71 --- linux-2.6.18.orig/include/linux/ext3_fs.h
  72 +++ linux-2.6.18/include/linux/ext3_fs.h
  73 @@ -201,6 +201,7 @@ struct ext3_group_desc
  74  #define EXT3_STATE_JDATA               0x00000001 /* journaled data exists */
  75  #define EXT3_STATE_NEW                 0x00000002 /* inode is newly created */
  76  #define EXT3_STATE_XATTR               0x00000004 /* has in-inode xattrs */
  77 +#define EXT3_STATE_NO_EXPAND           0x00000008 /* No space for expansion */
  78
  79  /* Used to pass group descriptor data when online resize is done */
  80  struct ext3_new_group_input {
  81 @@ -277,7 +278,7 @@ struct ext3_inode {
  82         __le32  i_flags;        /* File flags */
  83         union {
  84                 struct {
  85 -                       __u32  l_i_reserved1;
  86 +                       __u32  l_i_version;
  87                 } linux1;
  88                 struct {
  89                         __u32  h_i_translator;
  90 @@ -322,6 +323,7 @@ struct ext3_inode {
  91         __le32  i_atime_extra;  /* extra Access time      (nsec << 2 | epoch) */
  92         __le32  i_crtime;       /* File Creation time */
  93         __le32  i_crtime_extra; /* extra File Creation time (nsec << 2 | epoch) */
  94 +       __le32  i_version_hi;   /* high 32 bits for 64-bit version */
  95  };
  96
  97  #define i_size_high    i_dir_acl
  98 @@ -384,6 +386,8 @@ do {                                                                               \
  99                                        raw_inode->xtime ## _extra);            \
 100  } while (0)
 101
 102 +#define i_disk_version osd1.linux1.l_i_version
 103 +
 104  #if defined(__KERNEL__) || defined(__linux__)
 105  #define i_reserved1    osd1.linux1.l_i_reserved1
 106  #define i_frag         osd2.linux2.l_i_frag
 107 Index: linux-2.6.18/include/linux/ext3_fs_i.h
 108 ===================================================================
 109 --- linux-2.6.18.orig/include/linux/ext3_fs_i.h
 110 +++ linux-2.6.18/include/linux/ext3_fs_i.h
 111 @@ -21,6 +21,8 @@
 112  #include <linux/seqlock.h>
 113  #include <linux/mutex.h>
 114
 115 +#define HAVE_DISK_INODE_VERSION
 116 +
 117  /* data type for block offset of block group */
 118  typedef int ext3_grpblk_t;
 119
 120 @@ -147,6 +149,8 @@ struct ext3_inode_info {
 121         struct timespec i_crtime;
 122
 123         void *i_filterdata;
 124 +
 125 +       __u64 i_fs_version;
 126  };
 127
 128  #endif /* _LINUX_EXT3_FS_I */
 129 Index: linux-2.6.18/fs/ext3/xattr.c
 130 ===================================================================
 131 --- linux-2.6.18.orig/fs/ext3/xattr.c
 132 +++ linux-2.6.18/fs/ext3/xattr.c
 133 @@ -505,6 +505,20 @@ ext3_xattr_release_block(handle_t *handl
 134         }
 135  }
 136
 137 +static inline size_t ext3_xattr_free_space(struct ext3_xattr_entry *last,
 138 +                                   size_t *min_offs, void *base, int *total)
 139 +{
 140 +       for (; !IS_LAST_ENTRY(last); last = EXT3_XATTR_NEXT(last)) {
 141 +               *total += EXT3_XATTR_LEN(last->e_name_len);
 142 +               if (!last->e_value_block && last->e_value_size) {
 143 +                       size_t offs = le16_to_cpu(last->e_value_offs);
 144 +                       if (offs < *min_offs)
 145 +                               *min_offs = offs;
 146 +               }
 147 +       }
 148 +       return (*min_offs - ((void *)last - base) - sizeof(__u32));
 149 +}
 150 +
 151  struct ext3_xattr_info {
 152         int name_index;
 153         const char *name;
 154 @@ -1008,6 +1022,8 @@ ext3_xattr_set_handle(handle_t *handle,
 155         if (!error) {
 156                 ext3_xattr_update_super_block(handle, inode->i_sb);
 157                 inode->i_ctime = ext3_current_time(inode);
 158 +               if (!value)
 159 +                       EXT3_I(inode)->i_state &= ~EXT3_STATE_NO_EXPAND;
 160                 error = ext3_mark_iloc_dirty(handle, inode, &is.iloc);
 161                 /*
 162                  * The bh is consumed by ext3_mark_iloc_dirty, even with
 163 @@ -1060,6 +1076,249 @@ retry:
 164         return error;
 165  }
 166
 167 +static void ext3_xattr_shift_entries(struct ext3_xattr_entry *entry,
 168 +                                    int value_offs_shift, void *to,
 169 +                                    void *from, size_t n, int blocksize)
 170 +{
 171 +       struct ext3_xattr_entry *last = entry;
 172 +       int new_offs;
 173 +
 174 +       /* Adjust the value offsets of the entries */
 175 +       for (; !IS_LAST_ENTRY(last); last = EXT3_XATTR_NEXT(last)) {
 176 +               if (!last->e_value_block && last->e_value_size) {
 177 +                       new_offs = le16_to_cpu(last->e_value_offs) +
 178 +                                                       value_offs_shift;
 179 +                       BUG_ON(new_offs + le32_to_cpu(last->e_value_size) >
 180 +                              blocksize);
 181 +                       last->e_value_offs = cpu_to_le16(new_offs);
 182 +               }
 183 +       }
 184 +       /* Shift the entries by n bytes */
 185 +       memmove(to, from, n);
 186 +}
 187 +
 188 +/* Expand an inode by new_extra_isize bytes.
 189 + * Returns 0 on success or negative error number on failure.
 190 + */
 191 +int ext3_expand_extra_isize(struct inode *inode, int new_extra_isize,
 192 +                           struct ext3_iloc iloc, handle_t *handle)
 193 +{
 194 +       struct ext3_inode *raw_inode;
 195 +       struct ext3_xattr_ibody_header *header;
 196 +       struct ext3_xattr_entry *entry, *last, *first;
 197 +       struct buffer_head *bh = NULL;
 198 +       struct ext3_xattr_ibody_find *is = NULL;
 199 +       struct ext3_xattr_block_find *bs = NULL;
 200 +       char *buffer = NULL, *b_entry_name = NULL;
 201 +       size_t min_offs, free;
 202 +       int total_ino, total_blk;
 203 +       void *base, *start, *end;
 204 +       int extra_isize = 0, error = 0, tried_min_extra_isize = 0;
 205 +       int s_min_extra_isize = EXT3_SB(inode->i_sb)->s_es->s_min_extra_isize;
 206 +
 207 +       down_write(&EXT3_I(inode)->xattr_sem);
 208 +
 209 +retry:
 210 +       if (EXT3_I(inode)->i_extra_isize >= new_extra_isize) {
 211 +               up_write(&EXT3_I(inode)->xattr_sem);
 212 +               return 0;
 213 +       }
 214 +
 215 +       raw_inode = ext3_raw_inode(&iloc);
 216 +
 217 +       header = IHDR(inode, raw_inode);
 218 +       entry = IFIRST(header);
 219 +
 220 +       /* No extended attributes present */
 221 +       if (!(EXT3_I(inode)->i_state & EXT3_STATE_XATTR) ||
 222 +           header->h_magic != cpu_to_le32(EXT3_XATTR_MAGIC)) {
 223 +               memset((void *)raw_inode + EXT3_GOOD_OLD_INODE_SIZE, 0,
 224 +                      new_extra_isize);
 225 +               EXT3_I(inode)->i_extra_isize = new_extra_isize;
 226 +               goto cleanup;
 227 +       }
 228 +
 229 +       /*
 230 +        * Check if enough free space is available in the inode to shift the
 231 +        * entries ahead by new_extra_isize.
 232 +        */
 233 +
 234 +       base = start = entry;
 235 +       end = (void *)raw_inode + EXT3_SB(inode->i_sb)->s_inode_size;
 236 +       min_offs = end - base;
 237 +       last = entry;
 238 +       total_ino = sizeof(struct ext3_xattr_ibody_header);
 239 +
 240 +       free = ext3_xattr_free_space(last, &min_offs, base, &total_ino);
 241 +       if (free >= new_extra_isize) {
 242 +               entry = IFIRST(header);
 243 +               ext3_xattr_shift_entries(entry, EXT3_I(inode)->i_extra_isize -
 244 +                               new_extra_isize, (void *)raw_inode +
 245 +                               EXT3_GOOD_OLD_INODE_SIZE + new_extra_isize,
 246 +                               (void *)header, total_ino,
 247 +                               inode->i_sb->s_blocksize);
 248 +               EXT3_I(inode)->i_extra_isize = new_extra_isize;
 249 +               error = 0;
 250 +               goto cleanup;
 251 +       }
 252 +
 253 +       /*
 254 +        * Enough free space isn't available in the inode, check if
 255 +        * EA block can hold new_extra_isize bytes.
 256 +        */
 257 +       if (EXT3_I(inode)->i_file_acl) {
 258 +               bh = sb_bread(inode->i_sb, EXT3_I(inode)->i_file_acl);
 259 +               error = -EIO;
 260 +               if (!bh)
 261 +                       goto cleanup;
 262 +               if (ext3_xattr_check_block(bh)) {
 263 +                       ext3_error(inode->i_sb, __FUNCTION__,
 264 +                               "inode %lu: bad block "E3FSBLK, inode->i_ino,
 265 +                               EXT3_I(inode)->i_file_acl);
 266 +                       error = -EIO;
 267 +                       goto cleanup;
 268 +               }
 269 +               base = BHDR(bh);
 270 +               first = BFIRST(bh);
 271 +               end = bh->b_data + bh->b_size;
 272 +               min_offs = end - base;
 273 +               free = ext3_xattr_free_space(first, &min_offs, base,
 274 +                                            &total_blk);
 275 +               if (free < new_extra_isize) {
 276 +                       if (!tried_min_extra_isize && s_min_extra_isize) {
 277 +                               tried_min_extra_isize++;
 278 +                               new_extra_isize = s_min_extra_isize;
 279 +                               goto retry;
 280 +                       }
 281 +                       error = -1;
 282 +                       goto cleanup;
 283 +               }
 284 +       } else {
 285 +               free = inode->i_sb->s_blocksize;
 286 +       }
 287 +
 288 +       while (new_extra_isize > 0) {
 289 +               size_t offs, size, entry_size;
 290 +               struct ext3_xattr_entry *small_entry = NULL;
 291 +               struct ext3_xattr_info i = {
 292 +                       .value = NULL,
 293 +                       .value_len = 0,
 294 +               };
 295 +               unsigned int total_size, shift_bytes, temp = ~0U;
 296 +
 297 +               is = (struct ext3_xattr_ibody_find *) kmalloc(sizeof(struct
 298 +                                        ext3_xattr_ibody_find), GFP_KERNEL);
 299 +               bs = (struct ext3_xattr_block_find *) kmalloc(sizeof(struct
 300 +                                        ext3_xattr_block_find), GFP_KERNEL);
 301 +               memset((void *)is, 0, sizeof(struct ext3_xattr_ibody_find));
 302 +               memset((void *)bs, 0, sizeof(struct ext3_xattr_block_find));
 303 +
 304 +               is->s.not_found = bs->s.not_found = -ENODATA;
 305 +               is->iloc.bh = NULL;
 306 +               bs->bh = NULL;
 307 +
 308 +               last = IFIRST(header);
 309 +               /* Find the entry best suited to be pushed into EA block */
 310 +               entry = NULL;
 311 +               for (; !IS_LAST_ENTRY(last); last = EXT3_XATTR_NEXT(last)) {
 312 +                       total_size = EXT3_XATTR_SIZE(le32_to_cpu(last->e_value_size)) +
 313 +                                       EXT3_XATTR_LEN(last->e_name_len);
 314 +                       if (total_size <= free && total_size < temp) {
 315 +                               if (total_size < new_extra_isize) {
 316 +                                       small_entry = last;
 317 +                               } else {
 318 +                                       entry = last;
 319 +                                       temp = total_size;
 320 +                               }
 321 +                       }
 322 +               }
 323 +
 324 +               if (entry == NULL) {
 325 +                       if (small_entry) {
 326 +                               entry = small_entry;
 327 +                       } else {
 328 +                               if (!tried_min_extra_isize &&
 329 +                                   s_min_extra_isize) {
 330 +                                       tried_min_extra_isize++;
 331 +                                       new_extra_isize = s_min_extra_isize;
 332 +                                       goto retry;
 333 +                               }
 334 +                               error = -1;
 335 +                               goto cleanup;
 336 +                       }
 337 +               }
 338 +               offs = le16_to_cpu(entry->e_value_offs);
 339 +               size = le32_to_cpu(entry->e_value_size);
 340 +               entry_size = EXT3_XATTR_LEN(entry->e_name_len);
 341 +               i.name_index = entry->e_name_index,
 342 +               buffer = kmalloc(EXT3_XATTR_SIZE(size), GFP_KERNEL);
 343 +               b_entry_name = kmalloc(entry->e_name_len + 1, GFP_KERNEL);
 344 +               /* Save the entry name and the entry value */
 345 +               memcpy((void *)buffer, (void *)IFIRST(header) + offs,
 346 +                      EXT3_XATTR_SIZE(size));
 347 +               memcpy((void *)b_entry_name, (void *)entry->e_name,
 348 +                      entry->e_name_len);
 349 +               b_entry_name[entry->e_name_len] = '\0';
 350 +               i.name = b_entry_name;
 351 +
 352 +               error = ext3_get_inode_loc(inode, &is->iloc);
 353 +               if (error)
 354 +                       goto cleanup;
 355 +
 356 +               error = ext3_xattr_ibody_find(inode, &i, is);
 357 +               if (error)
 358 +                       goto cleanup;
 359 +
 360 +               /* Remove the chosen entry from the inode */
 361 +               error = ext3_xattr_ibody_set(handle, inode, &i, is);
 362 +
 363 +               entry = IFIRST(header);
 364 +               if (entry_size + EXT3_XATTR_SIZE(size) >= new_extra_isize)
 365 +                       shift_bytes = new_extra_isize;
 366 +               else
 367 +                       shift_bytes = entry_size + size;
 368 +               /* Adjust the offsets and shift the remaining entries ahead */
 369 +               ext3_xattr_shift_entries(entry, EXT3_I(inode)->i_extra_isize -
 370 +                       shift_bytes, (void *)raw_inode +
 371 +                       EXT3_GOOD_OLD_INODE_SIZE + extra_isize + shift_bytes,
 372 +                       (void *)header, total_ino - entry_size,
 373 +                       inode->i_sb->s_blocksize);
 374 +
 375 +               extra_isize += shift_bytes;
 376 +               new_extra_isize -= shift_bytes;
 377 +               EXT3_I(inode)->i_extra_isize = extra_isize;
 378 +
 379 +               i.name = b_entry_name;
 380 +               i.value = buffer;
 381 +               i.value_len = cpu_to_le32(size);
 382 +               error = ext3_xattr_block_find(inode, &i, bs);
 383 +               if (error)
 384 +                       goto cleanup;
 385 +
 386 +               /* Add entry which was removed from the inode into the block */
 387 +               error = ext3_xattr_block_set(handle, inode, &i, bs);
 388 +               if (error)
 389 +                       goto cleanup;
 390 +       }
 391 +
 392 +cleanup:
 393 +       if (b_entry_name)
 394 +               kfree(b_entry_name);
 395 +       if (buffer)
 396 +               kfree(buffer);
 397 +       if (is) {
 398 +               brelse(is->iloc.bh);
 399 +               kfree(is);
 400 +       }
 401 +       if (bs)
 402 +               kfree(bs);
 403 +       brelse(bh);
 404 +       up_write(&EXT3_I(inode)->xattr_sem);
 405 +       return error;
 406 +}
 407 +
 408 +
 409 +
 410  /*
 411   * ext3_xattr_delete_inode()
 412   *
 413 Index: linux-2.6.18/fs/ext3/xattr.h
 414 ===================================================================
 415 --- linux-2.6.18.orig/fs/ext3/xattr.h
 416 +++ linux-2.6.18/fs/ext3/xattr.h
 417 @@ -74,6 +74,9 @@ extern int ext3_xattr_set_handle(handle_
 418  extern void ext3_xattr_delete_inode(handle_t *, struct inode *);
 419  extern void ext3_xattr_put_super(struct super_block *);
 420
 421 +int ext3_expand_extra_isize(struct inode *inode, int new_extra_isize,
 422 +                           struct ext3_iloc iloc, handle_t *handle);
 423 +
 424  extern int init_ext3_xattr(void);
 425  extern void exit_ext3_xattr(void);
 426