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/types.h>
  19 #include <unistd.h>
  20 #include <limits.h> /* for PATH_MAX */
  21 #ifdef HAVE_ATTR_XATTR_H
  22 #include <attr/xattr.h>
  23 #endif
  24 #include <sys/ioctl.h>
  25 #include <ext2fs/ext2fs.h>
  26 #include <ext2fs/ext2_types.h>
  27 #include <ext2fs/fiemap.h>
  28
  29 #include "create_inode.h"
  30 #include "support/nls-enable.h"
  31
  32 /* 64KiB is the minimium blksize to best minimize system call overhead. */
  33 #define COPY_FILE_BUFLEN        65536
  34
  35 static int ext2_file_type(unsigned int mode)
  36 {
  37         if (LINUX_S_ISREG(mode))
  38                 return EXT2_FT_REG_FILE;
  39
  40         if (LINUX_S_ISDIR(mode))
  41                 return EXT2_FT_DIR;
  42
  43         if (LINUX_S_ISCHR(mode))
  44                 return EXT2_FT_CHRDEV;
  45
  46         if (LINUX_S_ISBLK(mode))
  47                 return EXT2_FT_BLKDEV;
  48
  49         if (LINUX_S_ISLNK(mode))
  50                 return EXT2_FT_SYMLINK;
  51
  52         if (LINUX_S_ISFIFO(mode))
  53                 return EXT2_FT_FIFO;
  54
  55         if (LINUX_S_ISSOCK(mode))
  56                 return EXT2_FT_SOCK;
  57
  58         return 0;
  59 }
  60
  61 /* Link an inode number to a directory */
  62 static errcode_t add_link(ext2_filsys fs, ext2_ino_t parent_ino,
  63                           ext2_ino_t ino, const char *name)
  64 {
  65         struct ext2_inode       inode;
  66         errcode_t               retval;
  67
  68         retval = ext2fs_read_inode(fs, ino, &inode);
  69         if (retval) {
  70                 com_err(__func__, retval, _("while reading inode %u"), ino);
  71                 return retval;
  72         }
  73
  74         retval = ext2fs_link(fs, parent_ino, name, ino,
  75                              ext2_file_type(inode.i_mode));
  76         if (retval == EXT2_ET_DIR_NO_SPACE) {
  77                 retval = ext2fs_expand_dir(fs, parent_ino);
  78                 if (retval) {
  79                         com_err(__func__, retval,
  80                                 _("while expanding directory"));
  81                         return retval;
  82                 }
  83                 retval = ext2fs_link(fs, parent_ino, name, ino,
  84                                      ext2_file_type(inode.i_mode));
  85         }
  86         if (retval) {
  87                 com_err(__func__, retval, _("while linking \"%s\""), name);
  88                 return retval;
  89         }
  90
  91         inode.i_links_count++;
  92
  93         retval = ext2fs_write_inode(fs, ino, &inode);
  94         if (retval)
  95                 com_err(__func__, retval, _("while writing inode %u"), ino);
  96
  97         return retval;
  98 }
  99
 100 /* Set the uid, gid, mode and time for the inode */
 101 static errcode_t set_inode_extra(ext2_filsys fs, ext2_ino_t ino,
 102                                  struct stat *st)
 103 {
 104         errcode_t               retval;
 105         struct ext2_inode       inode;
 106
 107         retval = ext2fs_read_inode(fs, ino, &inode);
 108         if (retval) {
 109                 com_err(__func__, retval, _("while reading inode %u"), ino);
 110                 return retval;
 111         }
 112
 113         inode.i_uid = st->st_uid;
 114         inode.i_gid = st->st_gid;
 115         inode.i_mode |= st->st_mode;
 116         inode.i_atime = st->st_atime;
 117         inode.i_mtime = st->st_mtime;
 118         inode.i_ctime = st->st_ctime;
 119
 120         retval = ext2fs_write_inode(fs, ino, &inode);
 121         if (retval)
 122                 com_err(__func__, retval, _("while writing inode %u"), ino);
 123         return retval;
 124 }
 125
 126 #ifdef HAVE_LLISTXATTR
 127 static errcode_t set_inode_xattr(ext2_filsys fs, ext2_ino_t ino,
 128                                  const char *filename)
 129 {
 130         errcode_t                       retval, close_retval;
 131         struct ext2_xattr_handle        *handle;
 132         ssize_t                         size, value_size;
 133         char                            *list = NULL;
 134         int                             i;
 135
 136         size = llistxattr(filename, NULL, 0);
 137         if (size == -1) {
 138                 retval = errno;
 139                 com_err(__func__, retval, _("while listing attributes of \"%s\""),
 140                         filename);
 141                 return retval;
 142         } else if (size == 0) {
 143                 return 0;
 144         }
 145
 146         retval = ext2fs_xattrs_open(fs, ino, &handle);
 147         if (retval) {
 148                 if (retval == EXT2_ET_MISSING_EA_FEATURE)
 149                         return 0;
 150                 com_err(__func__, retval, _("while opening inode %u"), ino);
 151                 return retval;
 152         }
 153
 154         retval = ext2fs_get_mem(size, &list);
 155         if (retval) {
 156                 com_err(__func__, retval, _("while allocating memory"));
 157                 goto out;
 158         }
 159
 160         size = llistxattr(filename, list, size);
 161         if (size == -1) {
 162                 retval = errno;
 163                 com_err(__func__, retval, _("while listing attributes of \"%s\""),
 164                         filename);
 165                 goto out;
 166         }
 167
 168         for (i = 0; i < size; i += strlen(&list[i]) + 1) {
 169                 const char *name = &list[i];
 170                 char *value;
 171
 172                 value_size = lgetxattr(filename, name, NULL, 0);
 173                 if (value_size == -1) {
 174                         retval = errno;
 175                         com_err(__func__, retval,
 176                                 _("while reading attribute \"%s\" of \"%s\""),
 177                                 name, filename);
 178                         break;
 179                 }
 180
 181                 retval = ext2fs_get_mem(value_size, &value);
 182                 if (retval) {
 183                         com_err(__func__, retval, _("while allocating memory"));
 184                         break;
 185                 }
 186
 187                 value_size = lgetxattr(filename, name, value, value_size);
 188                 if (value_size == -1) {
 189                         ext2fs_free_mem(&value);
 190                         retval = errno;
 191                         com_err(__func__, retval,
 192                                 _("while reading attribute \"%s\" of \"%s\""),
 193                                 name, filename);
 194                         break;
 195                 }
 196
 197                 retval = ext2fs_xattr_set(handle, name, value, value_size);
 198                 ext2fs_free_mem(&value);
 199                 if (retval) {
 200                         com_err(__func__, retval,
 201                                 _("while writing attribute \"%s\" to inode %u"),
 202                                 name, ino);
 203                         break;
 204                 }
 205
 206         }
 207  out:
 208         ext2fs_free_mem(&list);
 209         close_retval = ext2fs_xattrs_close(&handle);
 210         if (close_retval) {
 211                 com_err(__func__, retval, _("while closing inode %u"), ino);
 212                 retval = retval ? retval : close_retval;
 213         }
 214         return retval;
 215         return 0;
 216 }
 217 #else /* HAVE_LLISTXATTR */
 218 static errcode_t set_inode_xattr(ext2_filsys fs EXT2FS_ATTR((unused)),
 219                                  ext2_ino_t ino EXT2FS_ATTR((unused)),
 220                                  const char *filename EXT2FS_ATTR((unused)))
 221 {
 222         return 0;
 223 }
 224 #endif  /* HAVE_LLISTXATTR */
 225
 226 /* Make a special files (block and character devices), fifo's, and sockets  */
 227 errcode_t do_mknod_internal(ext2_filsys fs, ext2_ino_t cwd, const char *name,
 228                             struct stat *st)
 229 {
 230         ext2_ino_t              ino;
 231         errcode_t               retval;
 232         struct ext2_inode       inode;
 233         unsigned long           devmajor, devminor, mode;
 234         int                     filetype;
 235
 236         switch(st->st_mode & S_IFMT) {
 237         case S_IFCHR:
 238                 mode = LINUX_S_IFCHR;
 239                 filetype = EXT2_FT_CHRDEV;
 240                 break;
 241         case S_IFBLK:
 242                 mode = LINUX_S_IFBLK;
 243                 filetype =  EXT2_FT_BLKDEV;
 244                 break;
 245         case S_IFIFO:
 246                 mode = LINUX_S_IFIFO;
 247                 filetype = EXT2_FT_FIFO;
 248                 break;
 249         case S_IFSOCK:
 250                 mode = LINUX_S_IFSOCK;
 251                 filetype = EXT2_FT_SOCK;
 252                 break;
 253         default:
 254                 return EXT2_ET_INVALID_ARGUMENT;
 255         }
 256
 257         retval = ext2fs_new_inode(fs, cwd, 010755, 0, &ino);
 258         if (retval) {
 259                 com_err(__func__, retval, _("while allocating inode \"%s\""),
 260                         name);
 261                 return retval;
 262         }
 263
 264 #ifdef DEBUGFS
 265         printf("Allocated inode: %u\n", ino);
 266 #endif
 267         retval = ext2fs_link(fs, cwd, name, ino, filetype);
 268         if (retval == EXT2_ET_DIR_NO_SPACE) {
 269                 retval = ext2fs_expand_dir(fs, cwd);
 270                 if (retval) {
 271                         com_err(__func__, retval,
 272                                 _("while expanding directory"));
 273                         return retval;
 274                 }
 275                 retval = ext2fs_link(fs, cwd, name, ino, filetype);
 276         }
 277         if (retval) {
 278                 com_err(name, retval, _("while creating inode \"%s\""), name);
 279                 return retval;
 280         }
 281         if (ext2fs_test_inode_bitmap2(fs->inode_map, ino))
 282                 com_err(__func__, 0, "Warning: inode already set");
 283         ext2fs_inode_alloc_stats2(fs, ino, +1, 0);
 284         memset(&inode, 0, sizeof(inode));
 285         inode.i_mode = mode;
 286         inode.i_atime = inode.i_ctime = inode.i_mtime =
 287                 fs->now ? fs->now : time(0);
 288
 289         if (filetype != S_IFIFO) {
 290                 devmajor = major(st->st_rdev);
 291                 devminor = minor(st->st_rdev);
 292
 293                 if ((devmajor < 256) && (devminor < 256)) {
 294                         inode.i_block[0] = devmajor * 256 + devminor;
 295                         inode.i_block[1] = 0;
 296                 } else {
 297                         inode.i_block[0] = 0;
 298                         inode.i_block[1] = (devminor & 0xff) | (devmajor << 8) |
 299                                            ((devminor & ~0xff) << 12);
 300                 }
 301         }
 302         inode.i_links_count = 1;
 303
 304         retval = ext2fs_write_new_inode(fs, ino, &inode);
 305         if (retval)
 306                 com_err(__func__, retval, _("while writing inode %u"), ino);
 307
 308         return retval;
 309 }
 310
 311 /* Make a symlink name -> target */
 312 errcode_t do_symlink_internal(ext2_filsys fs, ext2_ino_t cwd, const char *name,
 313                               char *target, ext2_ino_t root)
 314 {
 315         char                    *cp;
 316         ext2_ino_t              parent_ino;
 317         errcode_t               retval;
 318
 319         cp = strrchr(name, '/');
 320         if (cp) {
 321                 *cp = 0;
 322                 retval = ext2fs_namei(fs, root, cwd, name, &parent_ino);
 323                 if (retval) {
 324                         com_err(name, retval, 0);
 325                         return retval;
 326                 }
 327                 name = cp+1;
 328         } else
 329                 parent_ino = cwd;
 330
 331         retval = ext2fs_symlink(fs, parent_ino, 0, name, target);
 332         if (retval == EXT2_ET_DIR_NO_SPACE) {
 333                 retval = ext2fs_expand_dir(fs, parent_ino);
 334                 if (retval) {
 335                         com_err("do_symlink_internal", retval,
 336                                 _("while expanding directory"));
 337                         return retval;
 338                 }
 339                 retval = ext2fs_symlink(fs, parent_ino, 0, name, target);
 340         }
 341         if (retval)
 342                 com_err("ext2fs_symlink", retval,
 343                         _("while creating symlink \"%s\""), name);
 344         return retval;
 345 }
 346
 347 /* Make a directory in the fs */
 348 errcode_t do_mkdir_internal(ext2_filsys fs, ext2_ino_t cwd, const char *name,
 349                             ext2_ino_t root)
 350 {
 351         char                    *cp;
 352         ext2_ino_t              parent_ino;
 353         errcode_t               retval;
 354
 355
 356         cp = strrchr(name, '/');
 357         if (cp) {
 358                 *cp = 0;
 359                 retval = ext2fs_namei(fs, root, cwd, name, &parent_ino);
 360                 if (retval) {
 361                         com_err(name, retval, _("while looking up \"%s\""),
 362                                 name);
 363                         return retval;
 364                 }
 365                 name = cp+1;
 366         } else
 367                 parent_ino = cwd;
 368
 369         retval = ext2fs_mkdir(fs, parent_ino, 0, name);
 370         if (retval == EXT2_ET_DIR_NO_SPACE) {
 371                 retval = ext2fs_expand_dir(fs, parent_ino);
 372                 if (retval) {
 373                         com_err(__func__, retval,
 374                                 _("while expanding directory"));
 375                         return retval;
 376                 }
 377                 retval = ext2fs_mkdir(fs, parent_ino, 0, name);
 378         }
 379         if (retval)
 380                 com_err("ext2fs_mkdir", retval,
 381                         _("while creating directory \"%s\""), name);
 382         return retval;
 383 }
 384
 385 #if !defined HAVE_PREAD64 && !defined HAVE_PREAD
 386 static ssize_t my_pread(int fd, void *buf, size_t count, off_t offset)
 387 {
 388         if (lseek(fd, offset, SEEK_SET) < 0)
 389                 return 0;
 390
 391         return read(fd, buf, count);
 392 }
 393 #endif /* !defined HAVE_PREAD64 && !defined HAVE_PREAD */
 394
 395 static errcode_t copy_file_range(ext2_filsys fs, int fd, ext2_file_t e2_file,
 396                                  off_t start, off_t end, char *buf,
 397                                  char *zerobuf)
 398 {
 399         off_t off, bpos;
 400         ssize_t got, blen;
 401         unsigned int written;
 402         char *ptr;
 403         errcode_t err = 0;
 404
 405         for (off = start; off < end; off += COPY_FILE_BUFLEN) {
 406 #ifdef HAVE_PREAD64
 407                 got = pread64(fd, buf, COPY_FILE_BUFLEN, off);
 408 #elif HAVE_PREAD
 409                 got = pread(fd, buf, COPY_FILE_BUFLEN, off);
 410 #else
 411                 got = my_pread(fd, buf, COPY_FILE_BUFLEN, off);
 412 #endif
 413                 if (got < 0) {
 414                         err = errno;
 415                         goto fail;
 416                 }
 417                 for (bpos = 0, ptr = buf; bpos < got; bpos += fs->blocksize) {
 418                         blen = fs->blocksize;
 419                         if (blen > got - bpos)
 420                                 blen = got - bpos;
 421                         if (memcmp(ptr, zerobuf, blen) == 0) {
 422                                 ptr += blen;
 423                                 continue;
 424                         }
 425                         err = ext2fs_file_lseek(e2_file, off + bpos,
 426                                                 EXT2_SEEK_SET, NULL);
 427                         if (err)
 428                                 goto fail;
 429                         while (blen > 0) {
 430                                 err = ext2fs_file_write(e2_file, ptr, blen,
 431                                                         &written);
 432                                 if (err)
 433                                         goto fail;
 434                                 if (written == 0) {
 435                                         err = EIO;
 436                                         goto fail;
 437                                 }
 438                                 blen -= written;
 439                                 ptr += written;
 440                         }
 441                 }
 442         }
 443 fail:
 444         return err;
 445 }
 446
 447 static errcode_t try_lseek_copy(ext2_filsys fs, int fd, struct stat *statbuf,
 448                                 ext2_file_t e2_file, char *buf, char *zerobuf)
 449 {
 450 #if defined(SEEK_DATA) && defined(SEEK_HOLE)
 451         off_t data = 0, hole;
 452         off_t data_blk, hole_blk;
 453         errcode_t err;
 454
 455         /* Try to use SEEK_DATA and SEEK_HOLE */
 456         while (data < statbuf->st_size) {
 457                 data = lseek(fd, data, SEEK_DATA);
 458                 if (data < 0) {
 459                         if (errno == ENXIO)
 460                                 break;
 461                         return EXT2_ET_UNIMPLEMENTED;
 462                 }
 463                 hole = lseek(fd, data, SEEK_HOLE);
 464                 if (hole < 0)
 465                         return EXT2_ET_UNIMPLEMENTED;
 466
 467                 data_blk = data & ~(fs->blocksize - 1);
 468                 hole_blk = (hole + (fs->blocksize - 1)) & ~(fs->blocksize - 1);
 469                 err = copy_file_range(fs, fd, e2_file, data_blk, hole_blk, buf,
 470                                       zerobuf);
 471                 if (err)
 472                         return err;
 473
 474                 data = hole;
 475         }
 476
 477         return err;
 478 #else
 479         return EXT2_ET_UNIMPLEMENTED;
 480 #endif /* SEEK_DATA and SEEK_HOLE */
 481 }
 482
 483 static errcode_t try_fiemap_copy(ext2_filsys fs, int fd, ext2_file_t e2_file,
 484                                  char *buf, char *zerobuf)
 485 {
 486 #if defined(FS_IOC_FIEMAP)
 487 #define EXTENT_MAX_COUNT 512
 488         struct fiemap *fiemap_buf;
 489         struct fiemap_extent *ext_buf, *ext;
 490         int ext_buf_size, fie_buf_size;
 491         off_t pos = 0;
 492         unsigned int i;
 493         errcode_t err;
 494
 495         ext_buf_size = EXTENT_MAX_COUNT * sizeof(struct fiemap_extent);
 496         fie_buf_size = sizeof(struct fiemap) + ext_buf_size;
 497
 498         err = ext2fs_get_memzero(fie_buf_size, &fiemap_buf);
 499         if (err)
 500                 return err;
 501
 502         ext_buf = fiemap_buf->fm_extents;
 503         memset(fiemap_buf, 0, fie_buf_size);
 504         fiemap_buf->fm_length = FIEMAP_MAX_OFFSET;
 505         fiemap_buf->fm_flags |= FIEMAP_FLAG_SYNC;
 506         fiemap_buf->fm_extent_count = EXTENT_MAX_COUNT;
 507
 508         do {
 509                 fiemap_buf->fm_start = pos;
 510                 memset(ext_buf, 0, ext_buf_size);
 511                 err = ioctl(fd, FS_IOC_FIEMAP, fiemap_buf);
 512                 if (err < 0 && (errno == EOPNOTSUPP || errno == ENOTTY)) {
 513                         err = EXT2_ET_UNIMPLEMENTED;
 514                         goto out;
 515                 } else if (err < 0 || fiemap_buf->fm_mapped_extents == 0) {
 516                         err = errno;
 517                         goto out;
 518                 }
 519                 for (i = 0, ext = ext_buf; i < fiemap_buf->fm_mapped_extents;
 520                      i++, ext++) {
 521                         err = copy_file_range(fs, fd, e2_file, ext->fe_logical,
 522                                               ext->fe_logical + ext->fe_length,
 523                                               buf, zerobuf);
 524                         if (err)
 525                                 goto out;
 526                 }
 527
 528                 ext--;
 529                 /* Record file's logical offset this time */
 530                 pos = ext->fe_logical + ext->fe_length;
 531                 /*
 532                  * If fm_extents array has been filled and
 533                  * there are extents left, continue to cycle.
 534                  */
 535         } while (fiemap_buf->fm_mapped_extents == EXTENT_MAX_COUNT &&
 536                  !(ext->fe_flags & FIEMAP_EXTENT_LAST));
 537 out:
 538         ext2fs_free_mem(&fiemap_buf);
 539         return err;
 540 #else
 541         return EXT2_ET_UNIMPLEMENTED;
 542 #endif /* FS_IOC_FIEMAP */
 543 }
 544
 545 static errcode_t copy_file(ext2_filsys fs, int fd, struct stat *statbuf,
 546                            ext2_ino_t ino)
 547 {
 548         ext2_file_t e2_file;
 549         char *buf = NULL, *zerobuf = NULL;
 550         errcode_t err, close_err;
 551
 552         err = ext2fs_file_open(fs, ino, EXT2_FILE_WRITE, &e2_file);
 553         if (err)
 554                 return err;
 555
 556         err = ext2fs_get_mem(COPY_FILE_BUFLEN, &buf);
 557         if (err)
 558                 goto out;
 559
 560         err = ext2fs_get_memzero(fs->blocksize, &zerobuf);
 561         if (err)
 562                 goto out;
 563
 564         err = try_lseek_copy(fs, fd, statbuf, e2_file, buf, zerobuf);
 565         if (err != EXT2_ET_UNIMPLEMENTED)
 566                 goto out;
 567
 568         err = try_fiemap_copy(fs, fd, e2_file, buf, zerobuf);
 569         if (err != EXT2_ET_UNIMPLEMENTED)
 570                 goto out;
 571
 572         err = copy_file_range(fs, fd, e2_file, 0, statbuf->st_size, buf,
 573                               zerobuf);
 574 out:
 575         ext2fs_free_mem(&zerobuf);
 576         ext2fs_free_mem(&buf);
 577         close_err = ext2fs_file_close(e2_file);
 578         if (err == 0)
 579                 err = close_err;
 580         return err;
 581 }
 582
 583 static int is_hardlink(struct hdlinks_s *hdlinks, dev_t dev, ino_t ino)
 584 {
 585         int i;
 586
 587         for (i = 0; i < hdlinks->count; i++) {
 588                 if (hdlinks->hdl[i].src_dev == dev &&
 589                     hdlinks->hdl[i].src_ino == ino)
 590                         return i;
 591         }
 592         return -1;
 593 }
 594
 595 /* Copy the native file to the fs */
 596 errcode_t do_write_internal(ext2_filsys fs, ext2_ino_t cwd, const char *src,
 597                             const char *dest, ext2_ino_t root)
 598 {
 599         int             fd;
 600         struct stat     statbuf;
 601         ext2_ino_t      newfile;
 602         errcode_t       retval;
 603         struct ext2_inode inode;
 604
 605         fd = ext2fs_open_file(src, O_RDONLY, 0);
 606         if (fd < 0) {
 607                 retval = errno;
 608                 com_err(__func__, retval, _("while opening \"%s\" to copy"),
 609                         src);
 610                 return retval;
 611         }
 612         if (fstat(fd, &statbuf) < 0) {
 613                 retval = errno;
 614                 goto out;
 615         }
 616
 617         retval = ext2fs_namei(fs, root, cwd, dest, &newfile);
 618         if (retval == 0) {
 619                 retval = EXT2_ET_FILE_EXISTS;
 620                 goto out;
 621         }
 622
 623         retval = ext2fs_new_inode(fs, cwd, 010755, 0, &newfile);
 624         if (retval)
 625                 goto out;
 626 #ifdef DEBUGFS
 627         printf("Allocated inode: %u\n", newfile);
 628 #endif
 629         retval = ext2fs_link(fs, cwd, dest, newfile,
 630                                 EXT2_FT_REG_FILE);
 631         if (retval == EXT2_ET_DIR_NO_SPACE) {
 632                 retval = ext2fs_expand_dir(fs, cwd);
 633                 if (retval)
 634                         goto out;
 635                 retval = ext2fs_link(fs, cwd, dest, newfile,
 636                                         EXT2_FT_REG_FILE);
 637         }
 638         if (retval)
 639                 goto out;
 640         if (ext2fs_test_inode_bitmap2(fs->inode_map, newfile))
 641                 com_err(__func__, 0, "Warning: inode already set");
 642         ext2fs_inode_alloc_stats2(fs, newfile, +1, 0);
 643         memset(&inode, 0, sizeof(inode));
 644         inode.i_mode = (statbuf.st_mode & ~LINUX_S_IFMT) | LINUX_S_IFREG;
 645         inode.i_atime = inode.i_ctime = inode.i_mtime =
 646                 fs->now ? fs->now : time(0);
 647         inode.i_links_count = 1;
 648         retval = ext2fs_inode_size_set(fs, &inode, statbuf.st_size);
 649         if (retval)
 650                 goto out;
 651         if (ext2fs_has_feature_inline_data(fs->super)) {
 652                 inode.i_flags |= EXT4_INLINE_DATA_FL;
 653         } else if (ext2fs_has_feature_extents(fs->super)) {
 654                 ext2_extent_handle_t handle;
 655
 656                 inode.i_flags &= ~EXT4_EXTENTS_FL;
 657                 retval = ext2fs_extent_open2(fs, newfile, &inode, &handle);
 658                 if (retval)
 659                         goto out;
 660                 ext2fs_extent_free(handle);
 661         }
 662
 663         retval = ext2fs_write_new_inode(fs, newfile, &inode);
 664         if (retval)
 665                 goto out;
 666         if (inode.i_flags & EXT4_INLINE_DATA_FL) {
 667                 retval = ext2fs_inline_data_init(fs, newfile);
 668                 if (retval)
 669                         goto out;
 670         }
 671         if (LINUX_S_ISREG(inode.i_mode)) {
 672                 retval = copy_file(fs, fd, &statbuf, newfile);
 673                 if (retval)
 674                         goto out;
 675         }
 676 out:
 677         close(fd);
 678         return retval;
 679 }
 680
 681 /* Copy files from source_dir to fs */
 682 static errcode_t __populate_fs(ext2_filsys fs, ext2_ino_t parent_ino,
 683                                const char *source_dir, ext2_ino_t root,
 684                                struct hdlinks_s *hdlinks)
 685 {
 686         const char      *name;
 687         DIR             *dh;
 688         struct dirent   *dent;
 689         struct stat     st;
 690         char            *ln_target = NULL;
 691         unsigned int    save_inode;
 692         ext2_ino_t      ino;
 693         errcode_t       retval = 0;
 694         int             read_cnt;
 695         int             hdlink;
 696
 697         if (chdir(source_dir) < 0) {
 698                 retval = errno;
 699                 com_err(__func__, retval,
 700                         _("while changing working directory to \"%s\""),
 701                         source_dir);
 702                 return retval;
 703         }
 704
 705         if (!(dh = opendir("."))) {
 706                 retval = errno;
 707                 com_err(__func__, retval,
 708                         _("while opening directory \"%s\""), source_dir);
 709                 return retval;
 710         }
 711
 712         while ((dent = readdir(dh))) {
 713                 if ((!strcmp(dent->d_name, ".")) ||
 714                     (!strcmp(dent->d_name, "..")))
 715                         continue;
 716                 if (lstat(dent->d_name, &st)) {
 717                         retval = errno;
 718                         com_err(__func__, retval, _("while lstat \"%s\""),
 719                                 dent->d_name);
 720                         goto out;
 721                 }
 722                 name = dent->d_name;
 723
 724                 /* Check for hardlinks */
 725                 save_inode = 0;
 726                 if (!S_ISDIR(st.st_mode) && !S_ISLNK(st.st_mode) &&
 727                     st.st_nlink > 1) {
 728                         hdlink = is_hardlink(hdlinks, st.st_dev, st.st_ino);
 729                         if (hdlink >= 0) {
 730                                 retval = add_link(fs, parent_ino,
 731                                                   hdlinks->hdl[hdlink].dst_ino,
 732                                                   name);
 733                                 if (retval) {
 734                                         com_err(__func__, retval,
 735                                                 "while linking %s", name);
 736                                         goto out;
 737                                 }
 738                                 continue;
 739                         } else
 740                                 save_inode = 1;
 741                 }
 742
 743                 switch(st.st_mode & S_IFMT) {
 744                 case S_IFCHR:
 745                 case S_IFBLK:
 746                 case S_IFIFO:
 747                 case S_IFSOCK:
 748                         retval = do_mknod_internal(fs, parent_ino, name, &st);
 749                         if (retval) {
 750                                 com_err(__func__, retval,
 751                                         _("while creating special file "
 752                                           "\"%s\""), name);
 753                                 goto out;
 754                         }
 755                         break;
 756                 case S_IFLNK:
 757                         ln_target = malloc(st.st_size + 1);
 758                         if (ln_target == NULL) {
 759                                 com_err(__func__, retval,
 760                                         _("malloc failed"));
 761                                 goto out;
 762                         }
 763                         read_cnt = readlink(name, ln_target,
 764                                             st.st_size + 1);
 765                         if (read_cnt == -1) {
 766                                 retval = errno;
 767                                 com_err(__func__, retval,
 768                                         _("while trying to read link \"%s\""),
 769                                         name);
 770                                 free(ln_target);
 771                                 goto out;
 772                         }
 773                         if (read_cnt > st.st_size) {
 774                                 com_err(__func__, retval,
 775                                         _("symlink increased in size "
 776                                           "between lstat() and readlink()"));
 777                                 free(ln_target);
 778                                 goto out;
 779                         }
 780                         ln_target[read_cnt] = '\0';
 781                         retval = do_symlink_internal(fs, parent_ino, name,
 782                                                      ln_target, root);
 783                         free(ln_target);
 784                         if (retval) {
 785                                 com_err(__func__, retval,
 786                                         _("while writing symlink\"%s\""),
 787                                         name);
 788                                 goto out;
 789                         }
 790                         break;
 791                 case S_IFREG:
 792                         retval = do_write_internal(fs, parent_ino, name, name,
 793                                                    root);
 794                         if (retval) {
 795                                 com_err(__func__, retval,
 796                                         _("while writing file \"%s\""), name);
 797                                 goto out;
 798                         }
 799                         break;
 800                 case S_IFDIR:
 801                         /* Don't choke on /lost+found */
 802                         if (parent_ino == EXT2_ROOT_INO &&
 803                             strcmp(name, "lost+found") == 0)
 804                                 goto find_lnf;
 805                         retval = do_mkdir_internal(fs, parent_ino, name,
 806                                                    root);
 807                         if (retval) {
 808                                 com_err(__func__, retval,
 809                                         _("while making dir \"%s\""), name);
 810                                 goto out;
 811                         }
 812 find_lnf:
 813                         retval = ext2fs_namei(fs, root, parent_ino,
 814                                               name, &ino);
 815                         if (retval) {
 816                                 com_err(name, retval, 0);
 817                                         goto out;
 818                         }
 819                         /* Populate the dir recursively*/
 820                         retval = __populate_fs(fs, ino, name, root, hdlinks);
 821                         if (retval)
 822                                 goto out;
 823                         if (chdir("..")) {
 824                                 retval = errno;
 825                                 com_err(__func__, retval,
 826                                         _("while changing directory"));
 827                                 goto out;
 828                         }
 829                         break;
 830                 default:
 831                         com_err(__func__, 0,
 832                                 _("ignoring entry \"%s\""), name);
 833                 }
 834
 835                 retval =  ext2fs_namei(fs, root, parent_ino, name, &ino);
 836                 if (retval) {
 837                         com_err(name, retval, _("while looking up \"%s\""),
 838                                 name);
 839                         goto out;
 840                 }
 841
 842                 retval = set_inode_extra(fs, ino, &st);
 843                 if (retval) {
 844                         com_err(__func__, retval,
 845                                 _("while setting inode for \"%s\""), name);
 846                         goto out;
 847                 }
 848
 849                 retval = set_inode_xattr(fs, ino, name);
 850                 if (retval) {
 851                         com_err(__func__, retval,
 852                                 _("while setting xattrs for \"%s\""), name);
 853                         goto out;
 854                 }
 855
 856                 /* Save the hardlink ino */
 857                 if (save_inode) {
 858                         /*
 859                          * Check whether need more memory, and we don't need
 860                          * free() since the lifespan will be over after the fs
 861                          * populated.
 862                          */
 863                         if (hdlinks->count == hdlinks->size) {
 864                                 void *p = realloc(hdlinks->hdl,
 865                                                 (hdlinks->size + HDLINK_CNT) *
 866                                                 sizeof(struct hdlink_s));
 867                                 if (p == NULL) {
 868                                         retval = EXT2_ET_NO_MEMORY;
 869                                         com_err(name, retval,
 870                                                 _("while saving inode data"));
 871                                         goto out;
 872                                 }
 873                                 hdlinks->hdl = p;
 874                                 hdlinks->size += HDLINK_CNT;
 875                         }
 876                         hdlinks->hdl[hdlinks->count].src_dev = st.st_dev;
 877                         hdlinks->hdl[hdlinks->count].src_ino = st.st_ino;
 878                         hdlinks->hdl[hdlinks->count].dst_ino = ino;
 879                         hdlinks->count++;
 880                 }
 881         }
 882
 883 out:
 884         closedir(dh);
 885         return retval;
 886 }
 887
 888 errcode_t populate_fs(ext2_filsys fs, ext2_ino_t parent_ino,
 889                       const char *source_dir, ext2_ino_t root)
 890 {
 891         struct hdlinks_s hdlinks;
 892         errcode_t retval;
 893
 894         if (!(fs->flags & EXT2_FLAG_RW)) {
 895                 com_err(__func__, 0, "Filesystem opened readonly");
 896                 return EROFS;
 897         }
 898
 899         hdlinks.count = 0;
 900         hdlinks.size = HDLINK_CNT;
 901         hdlinks.hdl = realloc(NULL, hdlinks.size * sizeof(struct hdlink_s));
 902         if (hdlinks.hdl == NULL) {
 903                 retval = errno;
 904                 com_err(__func__, retval, _("while allocating memory"));
 905                 return retval;
 906         }
 907
 908         retval = __populate_fs(fs, parent_ino, source_dir, root, &hdlinks);
 909
 910         free(hdlinks.hdl);
 911         return retval;
 912 }