misc/create_inode.c

   1 /*
   2  * create_inode.c --- create an inode
   3  *
   4  * Copyright (C) 2014 Robert Yang <liezhi.yang@windriver.com>
   5  *
   6  * %Begin-Header%
   7  * This file may be redistributed under the terms of the GNU library
   8  * General Public License, version 2.
   9  * %End-Header%
  10  */
  11
  12 #define _FILE_OFFSET_BITS       64
  13 #define _LARGEFILE64_SOURCE     1
  14 #define _GNU_SOURCE             1
  15
  16 #include "config.h"
  17 #include <time.h>
  18 #include <sys/stat.h>
  19 #include <sys/types.h>
  20 #include <unistd.h>
  21 #include <limits.h> /* for PATH_MAX */
  22 #if defined HAVE_SYS_XATTR_H
  23 #include <sys/xattr.h>
  24 #elif defined HAVE_ATTR_XATTR_H
  25 #include <attr/xattr.h>
  26 #endif
  27 #ifdef HAVE_SYS_IOCTL_H
  28 #include <sys/ioctl.h>
  29 #endif
  30 #ifdef HAVE_SYS_SYSMACROS_H
  31 #include <sys/sysmacros.h>
  32 #endif
  33
  34 #include <ext2fs/ext2fs.h>
  35 #include <ext2fs/ext2_types.h>
  36 #include <ext2fs/fiemap.h>
  37
  38 #include "create_inode.h"
  39 #include "support/nls-enable.h"
  40
  41 /* 64KiB is the minimum blksize to best minimize system call overhead. */
  42 #define COPY_FILE_BUFLEN        65536
  43
  44 static int ext2_file_type(unsigned int mode)
  45 {
  46         if (LINUX_S_ISREG(mode))
  47                 return EXT2_FT_REG_FILE;
  48
  49         if (LINUX_S_ISDIR(mode))
  50                 return EXT2_FT_DIR;
  51
  52         if (LINUX_S_ISCHR(mode))
  53                 return EXT2_FT_CHRDEV;
  54
  55         if (LINUX_S_ISBLK(mode))
  56                 return EXT2_FT_BLKDEV;
  57
  58         if (LINUX_S_ISLNK(mode))
  59                 return EXT2_FT_SYMLINK;
  60
  61         if (LINUX_S_ISFIFO(mode))
  62                 return EXT2_FT_FIFO;
  63
  64         if (LINUX_S_ISSOCK(mode))
  65                 return EXT2_FT_SOCK;
  66
  67         return 0;
  68 }
  69
  70 /* Link an inode number to a directory */
  71 static errcode_t add_link(ext2_filsys fs, ext2_ino_t parent_ino,
  72                           ext2_ino_t ino, const char *name)
  73 {
  74         struct ext2_inode       inode;
  75         errcode_t               retval;
  76
  77         retval = ext2fs_read_inode(fs, ino, &inode);
  78         if (retval) {
  79                 com_err(__func__, retval, _("while reading inode %u"), ino);
  80                 return retval;
  81         }
  82
  83         retval = ext2fs_link(fs, parent_ino, name, ino,
  84                              ext2_file_type(inode.i_mode));
  85         if (retval == EXT2_ET_DIR_NO_SPACE) {
  86                 retval = ext2fs_expand_dir(fs, parent_ino);
  87                 if (retval) {
  88                         com_err(__func__, retval,
  89                                 _("while expanding directory"));
  90                         return retval;
  91                 }
  92                 retval = ext2fs_link(fs, parent_ino, name, ino,
  93                                      ext2_file_type(inode.i_mode));
  94         }
  95         if (retval) {
  96                 com_err(__func__, retval, _("while linking \"%s\""), name);
  97                 return retval;
  98         }
  99
 100         inode.i_links_count++;
 101
 102         retval = ext2fs_write_inode(fs, ino, &inode);
 103         if (retval)
 104                 com_err(__func__, retval, _("while writing inode %u"), ino);
 105
 106         return retval;
 107 }
 108
 109 /* Set the uid, gid, mode and time for the inode */
 110 static errcode_t set_inode_extra(ext2_filsys fs, ext2_ino_t ino,
 111                                  struct stat *st)
 112 {
 113         errcode_t               retval;
 114         struct ext2_inode       inode;
 115
 116         retval = ext2fs_read_inode(fs, ino, &inode);
 117         if (retval) {
 118                 com_err(__func__, retval, _("while reading inode %u"), ino);
 119                 return retval;
 120         }
 121
 122         inode.i_uid = st->st_uid;
 123         inode.i_gid = st->st_gid;
 124         inode.i_mode |= st->st_mode;
 125         inode.i_atime = st->st_atime;
 126         inode.i_mtime = st->st_mtime;
 127         inode.i_ctime = st->st_ctime;
 128
 129         retval = ext2fs_write_inode(fs, ino, &inode);
 130         if (retval)
 131                 com_err(__func__, retval, _("while writing inode %u"), ino);
 132         return retval;
 133 }
 134
 135 #ifdef HAVE_LLISTXATTR
 136 static errcode_t set_inode_xattr(ext2_filsys fs, ext2_ino_t ino,
 137                                  const char *filename)
 138 {
 139         errcode_t                       retval, close_retval;
 140         struct ext2_xattr_handle        *handle;
 141         ssize_t                         size, value_size;
 142         char                            *list = NULL;
 143         int                             i;
 144
 145         if (no_copy_xattrs)
 146                 return 0;
 147
 148         size = llistxattr(filename, NULL, 0);
 149         if (size == -1) {
 150                 retval = errno;
 151                 com_err(__func__, retval, _("while listing attributes of \"%s\""),
 152                         filename);
 153                 return retval;
 154         } else if (size == 0) {
 155                 return 0;
 156         }
 157
 158         retval = ext2fs_xattrs_open(fs, ino, &handle);
 159         if (retval) {
 160                 if (retval == EXT2_ET_MISSING_EA_FEATURE)
 161                         return 0;
 162                 com_err(__func__, retval, _("while opening inode %u"), ino);
 163                 return retval;
 164         }
 165
 166         retval = ext2fs_get_mem(size, &list);
 167         if (retval) {
 168                 com_err(__func__, retval, _("while allocating memory"));
 169                 goto out;
 170         }
 171
 172         size = llistxattr(filename, list, size);
 173         if (size == -1) {
 174                 retval = errno;
 175                 com_err(__func__, retval, _("while listing attributes of \"%s\""),
 176                         filename);
 177                 goto out;
 178         }
 179
 180         for (i = 0; i < size; i += strlen(&list[i]) + 1) {
 181                 const char *name = &list[i];
 182                 char *value;
 183
 184                 value_size = lgetxattr(filename, name, NULL, 0);
 185                 if (value_size == -1) {
 186                         retval = errno;
 187                         com_err(__func__, retval,
 188                                 _("while reading attribute \"%s\" of \"%s\""),
 189                                 name, filename);
 190                         break;
 191                 }
 192
 193                 retval = ext2fs_get_mem(value_size, &value);
 194                 if (retval) {
 195                         com_err(__func__, retval, _("while allocating memory"));
 196                         break;
 197                 }
 198
 199                 value_size = lgetxattr(filename, name, value, value_size);
 200                 if (value_size == -1) {
 201                         ext2fs_free_mem(&value);
 202                         retval = errno;
 203                         com_err(__func__, retval,
 204                                 _("while reading attribute \"%s\" of \"%s\""),
 205                                 name, filename);
 206                         break;
 207                 }
 208
 209                 retval = ext2fs_xattr_set(handle, name, value, value_size);
 210                 ext2fs_free_mem(&value);
 211                 if (retval) {
 212                         com_err(__func__, retval,
 213                                 _("while writing attribute \"%s\" to inode %u"),
 214                                 name, ino);
 215                         break;
 216                 }
 217
 218         }
 219  out:
 220         ext2fs_free_mem(&list);
 221         close_retval = ext2fs_xattrs_close(&handle);
 222         if (close_retval) {
 223                 com_err(__func__, retval, _("while closing inode %u"), ino);
 224                 retval = retval ? retval : close_retval;
 225         }
 226         return retval;
 227         return 0;
 228 }
 229 #else /* HAVE_LLISTXATTR */
 230 static errcode_t set_inode_xattr(ext2_filsys fs EXT2FS_ATTR((unused)),
 231                                  ext2_ino_t ino EXT2FS_ATTR((unused)),
 232                                  const char *filename EXT2FS_ATTR((unused)))
 233 {
 234         return 0;
 235 }
 236 #endif  /* HAVE_LLISTXATTR */
 237
 238 #ifndef _WIN32
 239 /* Make a special files (block and character devices), fifo's, and sockets  */
 240 errcode_t do_mknod_internal(ext2_filsys fs, ext2_ino_t cwd, const char *name,
 241                             unsigned int st_mode, unsigned int st_rdev)
 242 {
 243         ext2_ino_t              ino;
 244         errcode_t               retval;
 245         struct ext2_inode       inode;
 246         unsigned long           devmajor, devminor, mode;
 247         int                     filetype;
 248
 249         switch(st_mode & S_IFMT) {
 250         case S_IFCHR:
 251                 mode = LINUX_S_IFCHR;
 252                 filetype = EXT2_FT_CHRDEV;
 253                 break;
 254         case S_IFBLK:
 255                 mode = LINUX_S_IFBLK;
 256                 filetype =  EXT2_FT_BLKDEV;
 257                 break;
 258         case S_IFIFO:
 259                 mode = LINUX_S_IFIFO;
 260                 filetype = EXT2_FT_FIFO;
 261                 break;
 262 #ifndef _WIN32
 263         case S_IFSOCK:
 264                 mode = LINUX_S_IFSOCK;
 265                 filetype = EXT2_FT_SOCK;
 266                 break;
 267 #endif
 268         default:
 269                 return EXT2_ET_INVALID_ARGUMENT;
 270         }
 271
 272         retval = ext2fs_new_inode(fs, cwd, 010755, 0, &ino);
 273         if (retval) {
 274                 com_err(__func__, retval, _("while allocating inode \"%s\""),
 275                         name);
 276                 return retval;
 277         }
 278
 279 #ifdef DEBUGFS
 280         printf("Allocated inode: %u\n", ino);
 281 #endif
 282         retval = ext2fs_link(fs, cwd, name, ino, filetype);
 283         if (retval == EXT2_ET_DIR_NO_SPACE) {
 284                 retval = ext2fs_expand_dir(fs, cwd);
 285                 if (retval) {
 286                         com_err(__func__, retval,
 287                                 _("while expanding directory"));
 288                         return retval;
 289                 }
 290                 retval = ext2fs_link(fs, cwd, name, ino, filetype);
 291         }
 292         if (retval) {
 293                 com_err(name, retval, _("while creating inode \"%s\""), name);
 294                 return retval;
 295         }
 296         if (ext2fs_test_inode_bitmap2(fs->inode_map, ino))
 297                 com_err(__func__, 0, "Warning: inode already set");
 298         ext2fs_inode_alloc_stats2(fs, ino, +1, 0);
 299         memset(&inode, 0, sizeof(inode));
 300         inode.i_mode = mode;
 301         inode.i_atime = inode.i_ctime = inode.i_mtime =
 302                 fs->now ? fs->now : time(0);
 303
 304         if (filetype != S_IFIFO) {
 305                 devmajor = major(st_rdev);
 306                 devminor = minor(st_rdev);
 307
 308                 if ((devmajor < 256) && (devminor < 256)) {
 309                         inode.i_block[0] = devmajor * 256 + devminor;
 310                         inode.i_block[1] = 0;
 311                 } else {
 312                         inode.i_block[0] = 0;
 313                         inode.i_block[1] = (devminor & 0xff) | (devmajor << 8) |
 314                                            ((devminor & ~0xff) << 12);
 315                 }
 316         }
 317         inode.i_links_count = 1;
 318
 319         retval = ext2fs_write_new_inode(fs, ino, &inode);
 320         if (retval)
 321                 com_err(__func__, retval, _("while writing inode %u"), ino);
 322
 323         return retval;
 324 }
 325 #endif
 326
 327 /* Make a symlink name -> target */
 328 errcode_t do_symlink_internal(ext2_filsys fs, ext2_ino_t cwd, const char *name,
 329                               char *target, ext2_ino_t root)
 330 {
 331         char                    *cp;
 332         ext2_ino_t              parent_ino;
 333         errcode_t               retval;
 334
 335         cp = strrchr(name, '/');
 336         if (cp) {
 337                 *cp = 0;
 338                 retval = ext2fs_namei(fs, root, cwd, name, &parent_ino);
 339                 if (retval) {
 340                         com_err(name, retval, 0);
 341                         return retval;
 342                 }
 343                 name = cp+1;
 344         } else
 345                 parent_ino = cwd;
 346
 347         retval = ext2fs_symlink(fs, parent_ino, 0, name, target);
 348         if (retval == EXT2_ET_DIR_NO_SPACE) {
 349                 retval = ext2fs_expand_dir(fs, parent_ino);
 350                 if (retval) {
 351                         com_err("do_symlink_internal", retval,
 352                                 _("while expanding directory"));
 353                         return retval;
 354                 }
 355                 retval = ext2fs_symlink(fs, parent_ino, 0, name, target);
 356         }
 357         if (retval)
 358                 com_err("ext2fs_symlink", retval,
 359                         _("while creating symlink \"%s\""), name);
 360         return retval;
 361 }
 362
 363 /* Make a directory in the fs */
 364 errcode_t do_mkdir_internal(ext2_filsys fs, ext2_ino_t cwd, const char *name,
 365                             ext2_ino_t root)
 366 {
 367         char                    *cp;
 368         ext2_ino_t              parent_ino;
 369         errcode_t               retval;
 370
 371
 372         cp = strrchr(name, '/');
 373         if (cp) {
 374                 *cp = 0;
 375                 retval = ext2fs_namei(fs, root, cwd, name, &parent_ino);
 376                 if (retval) {
 377                         com_err(name, retval, _("while looking up \"%s\""),
 378                                 name);
 379                         return retval;
 380                 }
 381                 name = cp+1;
 382         } else
 383                 parent_ino = cwd;
 384
 385         retval = ext2fs_mkdir(fs, parent_ino, 0, name);
 386         if (retval == EXT2_ET_DIR_NO_SPACE) {
 387                 retval = ext2fs_expand_dir(fs, parent_ino);
 388                 if (retval) {
 389                         com_err(__func__, retval,
 390                                 _("while expanding directory"));
 391                         return retval;
 392                 }
 393                 retval = ext2fs_mkdir(fs, parent_ino, 0, name);
 394         }
 395         if (retval)
 396                 com_err("ext2fs_mkdir", retval,
 397                         _("while creating directory \"%s\""), name);
 398         return retval;
 399 }
 400
 401 #if !defined HAVE_PREAD64 && !defined HAVE_PREAD
 402 static ssize_t my_pread(int fd, void *buf, size_t count, off_t offset)
 403 {
 404         if (lseek(fd, offset, SEEK_SET) < 0)
 405                 return 0;
 406
 407         return read(fd, buf, count);
 408 }
 409 #endif /* !defined HAVE_PREAD64 && !defined HAVE_PREAD */
 410
 411 static errcode_t copy_file_chunk(ext2_filsys fs, int fd, ext2_file_t e2_file,
 412                                  off_t start, off_t end, char *buf,
 413                                  char *zerobuf)
 414 {
 415         off_t off, bpos;
 416         ssize_t got, blen;
 417         unsigned int written;
 418         char *ptr;
 419         errcode_t err = 0;
 420
 421         for (off = start; off < end; off += COPY_FILE_BUFLEN) {
 422 #ifdef HAVE_PREAD64
 423                 got = pread64(fd, buf, COPY_FILE_BUFLEN, off);
 424 #elif HAVE_PREAD
 425                 got = pread(fd, buf, COPY_FILE_BUFLEN, off);
 426 #else
 427                 got = my_pread(fd, buf, COPY_FILE_BUFLEN, off);
 428 #endif
 429                 if (got < 0) {
 430                         err = errno;
 431                         goto fail;
 432                 }
 433                 for (bpos = 0, ptr = buf; bpos < got; bpos += fs->blocksize) {
 434                         blen = fs->blocksize;
 435                         if (blen > got - bpos)
 436                                 blen = got - bpos;
 437                         if (memcmp(ptr, zerobuf, blen) == 0) {
 438                                 ptr += blen;
 439                                 continue;
 440                         }
 441                         err = ext2fs_file_llseek(e2_file, off + bpos,
 442                                                 EXT2_SEEK_SET, NULL);
 443                         if (err)
 444                                 goto fail;
 445                         while (blen > 0) {
 446                                 err = ext2fs_file_write(e2_file, ptr, blen,
 447                                                         &written);
 448                                 if (err)
 449                                         goto fail;
 450                                 if (written == 0) {
 451                                         err = EIO;
 452                                         goto fail;
 453                                 }
 454                                 blen -= written;
 455                                 ptr += written;
 456                         }
 457                 }
 458         }
 459 fail:
 460         return err;
 461 }
 462
 463 #if defined(SEEK_DATA) && defined(SEEK_HOLE)
 464 static errcode_t try_lseek_copy(ext2_filsys fs, int fd, struct stat *statbuf,
 465                                 ext2_file_t e2_file, char *buf, char *zerobuf)
 466 {
 467         off_t data = 0, hole;
 468         off_t data_blk, hole_blk;
 469         errcode_t err = 0;
 470
 471         /* Try to use SEEK_DATA and SEEK_HOLE */
 472         while (data < statbuf->st_size) {
 473                 data = lseek(fd, data, SEEK_DATA);
 474                 if (data < 0) {
 475                         if (errno == ENXIO)
 476                                 break;
 477                         return EXT2_ET_UNIMPLEMENTED;
 478                 }
 479                 hole = lseek(fd, data, SEEK_HOLE);
 480                 if (hole < 0)
 481                         return EXT2_ET_UNIMPLEMENTED;
 482
 483                 data_blk = data & ~(off_t)(fs->blocksize - 1);
 484                 hole_blk = (hole + (off_t)(fs->blocksize - 1)) & ~(off_t)(fs->blocksize - 1);
 485                 err = copy_file_chunk(fs, fd, e2_file, data_blk, hole_blk, buf,
 486                                       zerobuf);
 487                 if (err)
 488                         return err;
 489
 490                 data = hole;
 491         }
 492
 493         return err;
 494 }
 495 #endif /* SEEK_DATA and SEEK_HOLE */
 496
 497 #if defined(FS_IOC_FIEMAP)
 498 static errcode_t try_fiemap_copy(ext2_filsys fs, int fd, ext2_file_t e2_file,
 499                                  char *buf, char *zerobuf)
 500 {
 501 #define EXTENT_MAX_COUNT 512
 502         struct fiemap *fiemap_buf;
 503         struct fiemap_extent *ext_buf, *ext;
 504         int ext_buf_size, fie_buf_size;
 505         off_t pos = 0;
 506         unsigned int i;
 507         errcode_t err;
 508
 509         ext_buf_size = EXTENT_MAX_COUNT * sizeof(struct fiemap_extent);
 510         fie_buf_size = sizeof(struct fiemap) + ext_buf_size;
 511
 512         err = ext2fs_get_memzero(fie_buf_size, &fiemap_buf);
 513         if (err)
 514                 return err;
 515
 516         ext_buf = fiemap_buf->fm_extents;
 517         memset(fiemap_buf, 0, fie_buf_size);
 518         fiemap_buf->fm_length = FIEMAP_MAX_OFFSET;
 519         fiemap_buf->fm_flags |= FIEMAP_FLAG_SYNC;
 520         fiemap_buf->fm_extent_count = EXTENT_MAX_COUNT;
 521
 522         do {
 523                 fiemap_buf->fm_start = pos;
 524                 memset(ext_buf, 0, ext_buf_size);
 525                 err = ioctl(fd, FS_IOC_FIEMAP, fiemap_buf);
 526                 if (err < 0 && (errno == EOPNOTSUPP || errno == ENOTTY)) {
 527                         err = EXT2_ET_UNIMPLEMENTED;
 528                         goto out;
 529                 } else if (err < 0) {
 530                         err = errno;
 531                         goto out;
 532                 } else if (fiemap_buf->fm_mapped_extents == 0)
 533                         goto out;
 534                 for (i = 0, ext = ext_buf; i < fiemap_buf->fm_mapped_extents;
 535                      i++, ext++) {
 536                         err = copy_file_chunk(fs, fd, e2_file, ext->fe_logical,
 537                                               ext->fe_logical + ext->fe_length,
 538                                               buf, zerobuf);
 539                         if (err)
 540                                 goto out;
 541                 }
 542
 543                 ext--;
 544                 /* Record file's logical offset this time */
 545                 pos = ext->fe_logical + ext->fe_length;
 546                 /*
 547                  * If fm_extents array has been filled and
 548                  * there are extents left, continue to cycle.
 549                  */
 550         } while (fiemap_buf->fm_mapped_extents == EXTENT_MAX_COUNT &&
 551                  !(ext->fe_flags & FIEMAP_EXTENT_LAST));
 552 out:
 553         ext2fs_free_mem(&fiemap_buf);
 554         return err;
 555 }
 556 #endif /* FS_IOC_FIEMAP */
 557
 558 static errcode_t copy_file(ext2_filsys fs, int fd, struct stat *statbuf,
 559                            ext2_ino_t ino)
 560 {
 561         ext2_file_t e2_file;
 562         char *buf = NULL, *zerobuf = NULL;
 563         errcode_t err, close_err;
 564
 565         err = ext2fs_file_open(fs, ino, EXT2_FILE_WRITE, &e2_file);
 566         if (err)
 567                 return err;
 568
 569         err = ext2fs_get_mem(COPY_FILE_BUFLEN, &buf);
 570         if (err)
 571                 goto out;
 572
 573         err = ext2fs_get_memzero(fs->blocksize, &zerobuf);
 574         if (err)
 575                 goto out;
 576
 577 #if defined(SEEK_DATA) && defined(SEEK_HOLE)
 578         err = try_lseek_copy(fs, fd, statbuf, e2_file, buf, zerobuf);
 579         if (err != EXT2_ET_UNIMPLEMENTED)
 580                 goto out;
 581 #endif
 582
 583 #if defined(FS_IOC_FIEMAP)
 584         err = try_fiemap_copy(fs, fd, e2_file, buf, zerobuf);
 585         if (err != EXT2_ET_UNIMPLEMENTED)
 586                 goto out;
 587 #endif
 588
 589         err = copy_file_chunk(fs, fd, e2_file, 0, statbuf->st_size, buf,
 590                               zerobuf);
 591 out:
 592         ext2fs_free_mem(&zerobuf);
 593         ext2fs_free_mem(&buf);
 594         close_err = ext2fs_file_close(e2_file);
 595         if (err == 0)
 596                 err = close_err;
 597         return err;
 598 }
 599
 600 static int is_hardlink(struct hdlinks_s *hdlinks, dev_t dev, ino_t ino)
 601 {
 602         int i;
 603
 604         for (i = 0; i < hdlinks->count; i++) {
 605                 if (hdlinks->hdl[i].src_dev == dev &&
 606                     hdlinks->hdl[i].src_ino == ino)
 607                         return i;
 608         }
 609         return -1;
 610 }
 611
 612 /* Copy the native file to the fs */
 613 errcode_t do_write_internal(ext2_filsys fs, ext2_ino_t cwd, const char *src,
 614                             const char *dest, ext2_ino_t root)
 615 {
 616         int             fd;
 617         struct stat     statbuf;
 618         ext2_ino_t      newfile;
 619         errcode_t       retval;
 620         struct ext2_inode inode;
 621
 622         fd = ext2fs_open_file(src, O_RDONLY, 0);
 623         if (fd < 0) {
 624                 retval = errno;
 625                 com_err(__func__, retval, _("while opening \"%s\" to copy"),
 626                         src);
 627                 return retval;
 628         }
 629         if (fstat(fd, &statbuf) < 0) {
 630                 retval = errno;
 631                 goto out;
 632         }
 633
 634         retval = ext2fs_namei(fs, root, cwd, dest, &newfile);
 635         if (retval == 0) {
 636                 retval = EXT2_ET_FILE_EXISTS;
 637                 goto out;
 638         }
 639
 640         retval = ext2fs_new_inode(fs, cwd, 010755, 0, &newfile);
 641         if (retval)
 642                 goto out;
 643 #ifdef DEBUGFS
 644         printf("Allocated inode: %u\n", newfile);
 645 #endif
 646         retval = ext2fs_link(fs, cwd, dest, newfile,
 647                                 EXT2_FT_REG_FILE);
 648         if (retval == EXT2_ET_DIR_NO_SPACE) {
 649                 retval = ext2fs_expand_dir(fs, cwd);
 650                 if (retval)
 651                         goto out;
 652                 retval = ext2fs_link(fs, cwd, dest, newfile,
 653                                         EXT2_FT_REG_FILE);
 654         }
 655         if (retval)
 656                 goto out;
 657         if (ext2fs_test_inode_bitmap2(fs->inode_map, newfile))
 658                 com_err(__func__, 0, "Warning: inode already set");
 659         ext2fs_inode_alloc_stats2(fs, newfile, +1, 0);
 660         memset(&inode, 0, sizeof(inode));
 661         inode.i_mode = (statbuf.st_mode & ~LINUX_S_IFMT) | LINUX_S_IFREG;
 662         inode.i_atime = inode.i_ctime = inode.i_mtime =
 663                 fs->now ? fs->now : time(0);
 664         inode.i_links_count = 1;
 665         retval = ext2fs_inode_size_set(fs, &inode, statbuf.st_size);
 666         if (retval)
 667                 goto out;
 668         if (ext2fs_has_feature_inline_data(fs->super)) {
 669                 inode.i_flags |= EXT4_INLINE_DATA_FL;
 670         } else if (ext2fs_has_feature_extents(fs->super)) {
 671                 ext2_extent_handle_t handle;
 672
 673                 inode.i_flags &= ~EXT4_EXTENTS_FL;
 674                 retval = ext2fs_extent_open2(fs, newfile, &inode, &handle);
 675                 if (retval)
 676                         goto out;
 677                 ext2fs_extent_free(handle);
 678         }
 679
 680         retval = ext2fs_write_new_inode(fs, newfile, &inode);
 681         if (retval)
 682                 goto out;
 683         if (inode.i_flags & EXT4_INLINE_DATA_FL) {
 684                 retval = ext2fs_inline_data_init(fs, newfile);
 685                 if (retval)
 686                         goto out;
 687         }
 688         if (LINUX_S_ISREG(inode.i_mode)) {
 689                 retval = copy_file(fs, fd, &statbuf, newfile);
 690                 if (retval)
 691                         goto out;
 692         }
 693 out:
 694         close(fd);
 695         return retval;
 696 }
 697
 698 struct file_info {
 699         char *path;
 700         size_t path_len;
 701         size_t path_max_len;
 702 };
 703
 704 static errcode_t path_append(struct file_info *target, const char *file)
 705 {
 706         if (strlen(file) + target->path_len + 1 > target->path_max_len) {
 707                 target->path_max_len *= 2;
 708                 target->path = realloc(target->path, target->path_max_len);
 709                 if (!target->path)
 710                         return EXT2_ET_NO_MEMORY;
 711         }
 712         target->path_len += sprintf(target->path + target->path_len, "/%s",
 713                                     file);
 714         return 0;
 715 }
 716
 717 /* Copy files from source_dir to fs */
 718 static errcode_t __populate_fs(ext2_filsys fs, ext2_ino_t parent_ino,
 719                                const char *source_dir, ext2_ino_t root,
 720                                struct hdlinks_s *hdlinks,
 721                                struct file_info *target,
 722                                struct fs_ops_callbacks *fs_callbacks)
 723 {
 724         const char      *name;
 725         DIR             *dh;
 726         struct dirent   *dent;
 727         struct stat     st;
 728         char            *ln_target = NULL;
 729         unsigned int    save_inode;
 730         ext2_ino_t      ino;
 731         errcode_t       retval = 0;
 732         int             read_cnt;
 733         int             hdlink;
 734         size_t          cur_dir_path_len;
 735
 736         if (chdir(source_dir) < 0) {
 737                 retval = errno;
 738                 com_err(__func__, retval,
 739                         _("while changing working directory to \"%s\""),
 740                         source_dir);
 741                 return retval;
 742         }
 743
 744         if (!(dh = opendir("."))) {
 745                 retval = errno;
 746                 com_err(__func__, retval,
 747                         _("while opening directory \"%s\""), source_dir);
 748                 return retval;
 749         }
 750
 751         while ((dent = readdir(dh))) {
 752                 if ((!strcmp(dent->d_name, ".")) ||
 753                     (!strcmp(dent->d_name, "..")))
 754                         continue;
 755                 if (lstat(dent->d_name, &st)) {
 756                         retval = errno;
 757                         com_err(__func__, retval, _("while lstat \"%s\""),
 758                                 dent->d_name);
 759                         goto out;
 760                 }
 761                 name = dent->d_name;
 762
 763                 /* Check for hardlinks */
 764                 save_inode = 0;
 765                 if (!S_ISDIR(st.st_mode) && !S_ISLNK(st.st_mode) &&
 766                     st.st_nlink > 1) {
 767                         hdlink = is_hardlink(hdlinks, st.st_dev, st.st_ino);
 768                         if (hdlink >= 0) {
 769                                 retval = add_link(fs, parent_ino,
 770                                                   hdlinks->hdl[hdlink].dst_ino,
 771                                                   name);
 772                                 if (retval) {
 773                                         com_err(__func__, retval,
 774                                                 "while linking %s", name);
 775                                         goto out;
 776                                 }
 777                                 continue;
 778                         } else
 779                                 save_inode = 1;
 780                 }
 781
 782                 cur_dir_path_len = target->path_len;
 783                 retval = path_append(target, name);
 784                 if (retval) {
 785                         com_err(__func__, retval,
 786                                 "while appending %s", name);
 787                         goto out;
 788                 }
 789
 790                 if (fs_callbacks && fs_callbacks->create_new_inode) {
 791                         retval = fs_callbacks->create_new_inode(fs,
 792                                 target->path, name, parent_ino, root,
 793                                 st.st_mode & S_IFMT);
 794                         if (retval)
 795                                 goto out;
 796                 }
 797
 798                 switch(st.st_mode & S_IFMT) {
 799                 case S_IFCHR:
 800                 case S_IFBLK:
 801                 case S_IFIFO:
 802 #ifndef _WIN32
 803                 case S_IFSOCK:
 804                         retval = do_mknod_internal(fs, parent_ino, name,
 805                                                    st.st_mode, st.st_rdev);
 806                         if (retval) {
 807                                 com_err(__func__, retval,
 808                                         _("while creating special file "
 809                                           "\"%s\""), name);
 810                                 goto out;
 811                         }
 812                         break;
 813                 case S_IFLNK:
 814                         ln_target = malloc(st.st_size + 1);
 815                         if (ln_target == NULL) {
 816                                 com_err(__func__, retval,
 817                                         _("malloc failed"));
 818                                 goto out;
 819                         }
 820                         read_cnt = readlink(name, ln_target,
 821                                             st.st_size + 1);
 822                         if (read_cnt == -1) {
 823                                 retval = errno;
 824                                 com_err(__func__, retval,
 825                                         _("while trying to read link \"%s\""),
 826                                         name);
 827                                 free(ln_target);
 828                                 goto out;
 829                         }
 830                         if (read_cnt > st.st_size) {
 831                                 com_err(__func__, retval,
 832                                         _("symlink increased in size "
 833                                           "between lstat() and readlink()"));
 834                                 free(ln_target);
 835                                 goto out;
 836                         }
 837                         ln_target[read_cnt] = '\0';
 838                         retval = do_symlink_internal(fs, parent_ino, name,
 839                                                      ln_target, root);
 840                         free(ln_target);
 841                         if (retval) {
 842                                 com_err(__func__, retval,
 843                                         _("while writing symlink\"%s\""),
 844                                         name);
 845                                 goto out;
 846                         }
 847                         break;
 848 #endif
 849                 case S_IFREG:
 850                         retval = do_write_internal(fs, parent_ino, name, name,
 851                                                    root);
 852                         if (retval) {
 853                                 com_err(__func__, retval,
 854                                         _("while writing file \"%s\""), name);
 855                                 goto out;
 856                         }
 857                         break;
 858                 case S_IFDIR:
 859                         /* Don't choke on /lost+found */
 860                         if (parent_ino == EXT2_ROOT_INO &&
 861                             strcmp(name, "lost+found") == 0)
 862                                 goto find_lnf;
 863                         retval = do_mkdir_internal(fs, parent_ino, name,
 864                                                    root);
 865                         if (retval) {
 866                                 com_err(__func__, retval,
 867                                         _("while making dir \"%s\""), name);
 868                                 goto out;
 869                         }
 870 find_lnf:
 871                         retval = ext2fs_namei(fs, root, parent_ino,
 872                                               name, &ino);
 873                         if (retval) {
 874                                 com_err(name, retval, 0);
 875                                         goto out;
 876                         }
 877                         /* Populate the dir recursively*/
 878                         retval = __populate_fs(fs, ino, name, root, hdlinks,
 879                                                target, fs_callbacks);
 880                         if (retval)
 881                                 goto out;
 882                         if (chdir("..")) {
 883                                 retval = errno;
 884                                 com_err(__func__, retval,
 885                                         _("while changing directory"));
 886                                 goto out;
 887                         }
 888                         break;
 889                 default:
 890                         com_err(__func__, 0,
 891                                 _("ignoring entry \"%s\""), name);
 892                 }
 893
 894                 retval =  ext2fs_namei(fs, root, parent_ino, name, &ino);
 895                 if (retval) {
 896                         com_err(name, retval, _("while looking up \"%s\""),
 897                                 name);
 898                         goto out;
 899                 }
 900
 901                 retval = set_inode_extra(fs, ino, &st);
 902                 if (retval) {
 903                         com_err(__func__, retval,
 904                                 _("while setting inode for \"%s\""), name);
 905                         goto out;
 906                 }
 907
 908                 retval = set_inode_xattr(fs, ino, name);
 909                 if (retval) {
 910                         com_err(__func__, retval,
 911                                 _("while setting xattrs for \"%s\""), name);
 912                         goto out;
 913                 }
 914
 915                 if (fs_callbacks && fs_callbacks->end_create_new_inode) {
 916                         retval = fs_callbacks->end_create_new_inode(fs,
 917                                 target->path, name, parent_ino, root,
 918                                 st.st_mode & S_IFMT);
 919                         if (retval)
 920                                 goto out;
 921                 }
 922
 923                 /* Save the hardlink ino */
 924                 if (save_inode) {
 925                         /*
 926                          * Check whether need more memory, and we don't need
 927                          * free() since the lifespan will be over after the fs
 928                          * populated.
 929                          */
 930                         if (hdlinks->count == hdlinks->size) {
 931                                 void *p = realloc(hdlinks->hdl,
 932                                                 (hdlinks->size + HDLINK_CNT) *
 933                                                 sizeof(struct hdlink_s));
 934                                 if (p == NULL) {
 935                                         retval = EXT2_ET_NO_MEMORY;
 936                                         com_err(name, retval,
 937                                                 _("while saving inode data"));
 938                                         goto out;
 939                                 }
 940                                 hdlinks->hdl = p;
 941                                 hdlinks->size += HDLINK_CNT;
 942                         }
 943                         hdlinks->hdl[hdlinks->count].src_dev = st.st_dev;
 944                         hdlinks->hdl[hdlinks->count].src_ino = st.st_ino;
 945                         hdlinks->hdl[hdlinks->count].dst_ino = ino;
 946                         hdlinks->count++;
 947                 }
 948                 target->path_len = cur_dir_path_len;
 949                 target->path[target->path_len] = 0;
 950         }
 951
 952 out:
 953         closedir(dh);
 954         return retval;
 955 }
 956
 957 errcode_t populate_fs2(ext2_filsys fs, ext2_ino_t parent_ino,
 958                        const char *source_dir, ext2_ino_t root,
 959                        struct fs_ops_callbacks *fs_callbacks)
 960 {
 961         struct file_info file_info;
 962         struct hdlinks_s hdlinks;
 963         errcode_t retval;
 964
 965         if (!(fs->flags & EXT2_FLAG_RW)) {
 966                 com_err(__func__, 0, "Filesystem opened readonly");
 967                 return EROFS;
 968         }
 969
 970         hdlinks.count = 0;
 971         hdlinks.size = HDLINK_CNT;
 972         hdlinks.hdl = realloc(NULL, hdlinks.size * sizeof(struct hdlink_s));
 973         if (hdlinks.hdl == NULL) {
 974                 retval = errno;
 975                 com_err(__func__, retval, _("while allocating memory"));
 976                 return retval;
 977         }
 978
 979         file_info.path_len = 0;
 980         file_info.path_max_len = 255;
 981         file_info.path = calloc(file_info.path_max_len, 1);
 982
 983         retval = __populate_fs(fs, parent_ino, source_dir, root, &hdlinks,
 984                                &file_info, fs_callbacks);
 985
 986         free(file_info.path);
 987         free(hdlinks.hdl);
 988         return retval;
 989 }
 990
 991 errcode_t populate_fs(ext2_filsys fs, ext2_ino_t parent_ino,
 992                       const char *source_dir, ext2_ino_t root)
 993 {
 994         return populate_fs2(fs, parent_ino, source_dir, root, NULL);
 995 }