diff options
Diffstat (limited to 'e2fsprogs/e2fsck/pass3.c')
| -rw-r--r-- | e2fsprogs/e2fsck/pass3.c | 804 |
1 files changed, 0 insertions, 804 deletions
diff --git a/e2fsprogs/e2fsck/pass3.c b/e2fsprogs/e2fsck/pass3.c deleted file mode 100644 index a92c890..0000000 --- a/e2fsprogs/e2fsck/pass3.c +++ /dev/null @@ -1,804 +0,0 @@ -/* - * pass3.c -- pass #3 of e2fsck: Check for directory connectivity - * - * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999 Theodore Ts'o. - * - * %Begin-Header% - * This file may be redistributed under the terms of the GNU Public - * License. - * %End-Header% - * - * Pass #3 assures that all directories are connected to the - * filesystem tree, using the following algorithm: - * - * First, the root directory is checked to make sure it exists; if - * not, e2fsck will offer to create a new one. It is then marked as - * "done". - * - * Then, pass3 interates over all directory inodes; for each directory - * it attempts to trace up the filesystem tree, using dirinfo.parent - * until it reaches a directory which has been marked "done". If it - * can not do so, then the directory must be disconnected, and e2fsck - * will offer to reconnect it to /lost+found. While it is chasing - * parent pointers up the filesystem tree, if pass3 sees a directory - * twice, then it has detected a filesystem loop, and it will again - * offer to reconnect the directory to /lost+found in to break the - * filesystem loop. - * - * Pass 3 also contains the subroutine, e2fsck_reconnect_file() to - * reconnect inodes to /lost+found; this subroutine is also used by - * pass 4. e2fsck_reconnect_file() calls get_lost_and_found(), which - * is responsible for creating /lost+found if it does not exist. - * - * Pass 3 frees the following data structures: - * - The dirinfo directory information cache. - */ - -#ifdef HAVE_ERRNO_H -#include <errno.h> -#endif - -#include "e2fsck.h" -#include "problem.h" - -static void check_root(e2fsck_t ctx); -static int check_directory(e2fsck_t ctx, struct dir_info *dir, - struct problem_context *pctx); -static void fix_dotdot(e2fsck_t ctx, struct dir_info *dir, ext2_ino_t parent); - -static ext2fs_inode_bitmap inode_loop_detect = 0; -static ext2fs_inode_bitmap inode_done_map = 0; - -void e2fsck_pass3(e2fsck_t ctx) -{ - ext2_filsys fs = ctx->fs; - int i; -#ifdef RESOURCE_TRACK - struct resource_track rtrack; -#endif - struct problem_context pctx; - struct dir_info *dir; - unsigned long maxdirs, count; - -#ifdef RESOURCE_TRACK - init_resource_track(&rtrack); -#endif - - clear_problem_context(&pctx); - -#ifdef MTRACE - mtrace_print("Pass 3"); -#endif - - if (!(ctx->options & E2F_OPT_PREEN)) - fix_problem(ctx, PR_3_PASS_HEADER, &pctx); - - /* - * Allocate some bitmaps to do loop detection. - */ - pctx.errcode = ext2fs_allocate_inode_bitmap(fs, _("inode done bitmap"), - &inode_done_map); - if (pctx.errcode) { - pctx.num = 2; - fix_problem(ctx, PR_3_ALLOCATE_IBITMAP_ERROR, &pctx); - ctx->flags |= E2F_FLAG_ABORT; - goto abort_exit; - } -#ifdef RESOURCE_TRACK - if (ctx->options & E2F_OPT_TIME) { - e2fsck_clear_progbar(ctx); - print_resource_track(_("Peak memory"), &ctx->global_rtrack); - } -#endif - - check_root(ctx); - if (ctx->flags & E2F_FLAG_SIGNAL_MASK) - goto abort_exit; - - ext2fs_mark_inode_bitmap(inode_done_map, EXT2_ROOT_INO); - - maxdirs = e2fsck_get_num_dirinfo(ctx); - count = 1; - - if (ctx->progress) - if ((ctx->progress)(ctx, 3, 0, maxdirs)) - goto abort_exit; - - for (i=0; (dir = e2fsck_dir_info_iter(ctx, &i)) != 0;) { - if (ctx->flags & E2F_FLAG_SIGNAL_MASK) - goto abort_exit; - if (ctx->progress && (ctx->progress)(ctx, 3, count++, maxdirs)) - goto abort_exit; - if (ext2fs_test_inode_bitmap(ctx->inode_dir_map, dir->ino)) - if (check_directory(ctx, dir, &pctx)) - goto abort_exit; - } - - /* - * Force the creation of /lost+found if not present - */ - if ((ctx->flags & E2F_OPT_READONLY) == 0) - e2fsck_get_lost_and_found(ctx, 1); - - /* - * If there are any directories that need to be indexed or - * optimized, do it here. - */ - e2fsck_rehash_directories(ctx); - -abort_exit: - e2fsck_free_dir_info(ctx); - if (inode_loop_detect) { - ext2fs_free_inode_bitmap(inode_loop_detect); - inode_loop_detect = 0; - } - if (inode_done_map) { - ext2fs_free_inode_bitmap(inode_done_map); - inode_done_map = 0; - } - -#ifdef RESOURCE_TRACK - if (ctx->options & E2F_OPT_TIME2) { - e2fsck_clear_progbar(ctx); - print_resource_track(_("Pass 3"), &rtrack); - } -#endif -} - -/* - * This makes sure the root inode is present; if not, we ask if the - * user wants us to create it. Not creating it is a fatal error. - */ -static void check_root(e2fsck_t ctx) -{ - ext2_filsys fs = ctx->fs; - blk_t blk; - struct ext2_inode inode; - char * block; - struct problem_context pctx; - - clear_problem_context(&pctx); - - if (ext2fs_test_inode_bitmap(ctx->inode_used_map, EXT2_ROOT_INO)) { - /* - * If the root inode is not a directory, die here. The - * user must have answered 'no' in pass1 when we - * offered to clear it. - */ - if (!(ext2fs_test_inode_bitmap(ctx->inode_dir_map, - EXT2_ROOT_INO))) { - fix_problem(ctx, PR_3_ROOT_NOT_DIR_ABORT, &pctx); - ctx->flags |= E2F_FLAG_ABORT; - } - return; - } - - if (!fix_problem(ctx, PR_3_NO_ROOT_INODE, &pctx)) { - fix_problem(ctx, PR_3_NO_ROOT_INODE_ABORT, &pctx); - ctx->flags |= E2F_FLAG_ABORT; - return; - } - - e2fsck_read_bitmaps(ctx); - - /* - * First, find a free block - */ - pctx.errcode = ext2fs_new_block(fs, 0, ctx->block_found_map, &blk); - if (pctx.errcode) { - pctx.str = "ext2fs_new_block"; - fix_problem(ctx, PR_3_CREATE_ROOT_ERROR, &pctx); - ctx->flags |= E2F_FLAG_ABORT; - return; - } - ext2fs_mark_block_bitmap(ctx->block_found_map, blk); - ext2fs_mark_block_bitmap(fs->block_map, blk); - ext2fs_mark_bb_dirty(fs); - - /* - * Now let's create the actual data block for the inode - */ - pctx.errcode = ext2fs_new_dir_block(fs, EXT2_ROOT_INO, EXT2_ROOT_INO, - &block); - if (pctx.errcode) { - pctx.str = "ext2fs_new_dir_block"; - fix_problem(ctx, PR_3_CREATE_ROOT_ERROR, &pctx); - ctx->flags |= E2F_FLAG_ABORT; - return; - } - - pctx.errcode = ext2fs_write_dir_block(fs, blk, block); - if (pctx.errcode) { - pctx.str = "ext2fs_write_dir_block"; - fix_problem(ctx, PR_3_CREATE_ROOT_ERROR, &pctx); - ctx->flags |= E2F_FLAG_ABORT; - return; - } - ext2fs_free_mem(&block); - - /* - * Set up the inode structure - */ - memset(&inode, 0, sizeof(inode)); - inode.i_mode = 040755; - inode.i_size = fs->blocksize; - inode.i_atime = inode.i_ctime = inode.i_mtime = time(0); - inode.i_links_count = 2; - inode.i_blocks = fs->blocksize / 512; - inode.i_block[0] = blk; - - /* - * Write out the inode. - */ - pctx.errcode = ext2fs_write_new_inode(fs, EXT2_ROOT_INO, &inode); - if (pctx.errcode) { - pctx.str = "ext2fs_write_inode"; - fix_problem(ctx, PR_3_CREATE_ROOT_ERROR, &pctx); - ctx->flags |= E2F_FLAG_ABORT; - return; - } - - /* - * Miscellaneous bookkeeping... - */ - e2fsck_add_dir_info(ctx, EXT2_ROOT_INO, EXT2_ROOT_INO); - ext2fs_icount_store(ctx->inode_count, EXT2_ROOT_INO, 2); - ext2fs_icount_store(ctx->inode_link_info, EXT2_ROOT_INO, 2); - - ext2fs_mark_inode_bitmap(ctx->inode_used_map, EXT2_ROOT_INO); - ext2fs_mark_inode_bitmap(ctx->inode_dir_map, EXT2_ROOT_INO); - ext2fs_mark_inode_bitmap(fs->inode_map, EXT2_ROOT_INO); - ext2fs_mark_ib_dirty(fs); -} - -/* - * This subroutine is responsible for making sure that a particular - * directory is connected to the root; if it isn't we trace it up as - * far as we can go, and then offer to connect the resulting parent to - * the lost+found. We have to do loop detection; if we ever discover - * a loop, we treat that as a disconnected directory and offer to - * reparent it to lost+found. - * - * However, loop detection is expensive, because for very large - * filesystems, the inode_loop_detect bitmap is huge, and clearing it - * is non-trivial. Loops in filesystems are also a rare error case, - * and we shouldn't optimize for error cases. So we try two passes of - * the algorithm. The first time, we ignore loop detection and merely - * increment a counter; if the counter exceeds some extreme threshold, - * then we try again with the loop detection bitmap enabled. - */ -static int check_directory(e2fsck_t ctx, struct dir_info *dir, - struct problem_context *pctx) -{ - ext2_filsys fs = ctx->fs; - struct dir_info *p = dir; - int loop_pass = 0, parent_count = 0; - - if (!p) - return 0; - - while (1) { - /* - * Mark this inode as being "done"; by the time we - * return from this function, the inode we either be - * verified as being connected to the directory tree, - * or we will have offered to reconnect this to - * lost+found. - * - * If it was marked done already, then we've reached a - * parent we've already checked. - */ - if (ext2fs_mark_inode_bitmap(inode_done_map, p->ino)) - break; - - /* - * If this directory doesn't have a parent, or we've - * seen the parent once already, then offer to - * reparent it to lost+found - */ - if (!p->parent || - (loop_pass && - (ext2fs_test_inode_bitmap(inode_loop_detect, - p->parent)))) { - pctx->ino = p->ino; - if (fix_problem(ctx, PR_3_UNCONNECTED_DIR, pctx)) { - if (e2fsck_reconnect_file(ctx, pctx->ino)) - ext2fs_unmark_valid(fs); - else { - p = e2fsck_get_dir_info(ctx, pctx->ino); - p->parent = ctx->lost_and_found; - fix_dotdot(ctx, p, ctx->lost_and_found); - } - } - break; - } - p = e2fsck_get_dir_info(ctx, p->parent); - if (!p) { - fix_problem(ctx, PR_3_NO_DIRINFO, pctx); - return 0; - } - if (loop_pass) { - ext2fs_mark_inode_bitmap(inode_loop_detect, - p->ino); - } else if (parent_count++ > 2048) { - /* - * If we've run into a path depth that's - * greater than 2048, try again with the inode - * loop bitmap turned on and start from the - * top. - */ - loop_pass = 1; - if (inode_loop_detect) - ext2fs_clear_inode_bitmap(inode_loop_detect); - else { - pctx->errcode = ext2fs_allocate_inode_bitmap(fs, _("inode loop detection bitmap"), &inode_loop_detect); - if (pctx->errcode) { - pctx->num = 1; - fix_problem(ctx, - PR_3_ALLOCATE_IBITMAP_ERROR, pctx); - ctx->flags |= E2F_FLAG_ABORT; - return -1; - } - } - p = dir; - } - } - - /* - * Make sure that .. and the parent directory are the same; - * offer to fix it if not. - */ - if (dir->parent != dir->dotdot) { - pctx->ino = dir->ino; - pctx->ino2 = dir->dotdot; - pctx->dir = dir->parent; - if (fix_problem(ctx, PR_3_BAD_DOT_DOT, pctx)) - fix_dotdot(ctx, dir, dir->parent); - } - return 0; -} - -/* - * This routine gets the lost_and_found inode, making it a directory - * if necessary - */ -ext2_ino_t e2fsck_get_lost_and_found(e2fsck_t ctx, int fix) -{ - ext2_filsys fs = ctx->fs; - ext2_ino_t ino; - blk_t blk; - errcode_t retval; - struct ext2_inode inode; - char * block; - static const char name[] = "lost+found"; - struct problem_context pctx; - struct dir_info *dirinfo; - - if (ctx->lost_and_found) - return ctx->lost_and_found; - - clear_problem_context(&pctx); - - retval = ext2fs_lookup(fs, EXT2_ROOT_INO, name, - sizeof(name)-1, 0, &ino); - if (retval && !fix) - return 0; - if (!retval) { - if (ext2fs_test_inode_bitmap(ctx->inode_dir_map, ino)) { - ctx->lost_and_found = ino; - return ino; - } - - /* Lost+found isn't a directory! */ - if (!fix) - return 0; - pctx.ino = ino; - if (!fix_problem(ctx, PR_3_LPF_NOTDIR, &pctx)) - return 0; - - /* OK, unlink the old /lost+found file. */ - pctx.errcode = ext2fs_unlink(fs, EXT2_ROOT_INO, name, ino, 0); - if (pctx.errcode) { - pctx.str = "ext2fs_unlink"; - fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx); - return 0; - } - dirinfo = e2fsck_get_dir_info(ctx, ino); - if (dirinfo) - dirinfo->parent = 0; - e2fsck_adjust_inode_count(ctx, ino, -1); - } else if (retval != EXT2_ET_FILE_NOT_FOUND) { - pctx.errcode = retval; - fix_problem(ctx, PR_3_ERR_FIND_LPF, &pctx); - } - if (!fix_problem(ctx, PR_3_NO_LF_DIR, 0)) - return 0; - - /* - * Read the inode and block bitmaps in; we'll be messing with - * them. - */ - e2fsck_read_bitmaps(ctx); - - /* - * First, find a free block - */ - retval = ext2fs_new_block(fs, 0, ctx->block_found_map, &blk); - if (retval) { - pctx.errcode = retval; - fix_problem(ctx, PR_3_ERR_LPF_NEW_BLOCK, &pctx); - return 0; - } - ext2fs_mark_block_bitmap(ctx->block_found_map, blk); - ext2fs_block_alloc_stats(fs, blk, +1); - - /* - * Next find a free inode. - */ - retval = ext2fs_new_inode(fs, EXT2_ROOT_INO, 040700, - ctx->inode_used_map, &ino); - if (retval) { - pctx.errcode = retval; - fix_problem(ctx, PR_3_ERR_LPF_NEW_INODE, &pctx); - return 0; - } - ext2fs_mark_inode_bitmap(ctx->inode_used_map, ino); - ext2fs_mark_inode_bitmap(ctx->inode_dir_map, ino); - ext2fs_inode_alloc_stats2(fs, ino, +1, 1); - - /* - * Now let's create the actual data block for the inode - */ - retval = ext2fs_new_dir_block(fs, ino, EXT2_ROOT_INO, &block); - if (retval) { - pctx.errcode = retval; - fix_problem(ctx, PR_3_ERR_LPF_NEW_DIR_BLOCK, &pctx); - return 0; - } - - retval = ext2fs_write_dir_block(fs, blk, block); - ext2fs_free_mem(&block); - if (retval) { - pctx.errcode = retval; - fix_problem(ctx, PR_3_ERR_LPF_WRITE_BLOCK, &pctx); - return 0; - } - - /* - * Set up the inode structure - */ - memset(&inode, 0, sizeof(inode)); - inode.i_mode = 040700; - inode.i_size = fs->blocksize; - inode.i_atime = inode.i_ctime = inode.i_mtime = time(0); - inode.i_links_count = 2; - inode.i_blocks = fs->blocksize / 512; - inode.i_block[0] = blk; - - /* - * Next, write out the inode. - */ - pctx.errcode = ext2fs_write_new_inode(fs, ino, &inode); - if (pctx.errcode) { - pctx.str = "ext2fs_write_inode"; - fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx); - return 0; - } - /* - * Finally, create the directory link - */ - pctx.errcode = ext2fs_link(fs, EXT2_ROOT_INO, name, ino, EXT2_FT_DIR); - if (pctx.errcode) { - pctx.str = "ext2fs_link"; - fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx); - return 0; - } - - /* - * Miscellaneous bookkeeping that needs to be kept straight. - */ - e2fsck_add_dir_info(ctx, ino, EXT2_ROOT_INO); - e2fsck_adjust_inode_count(ctx, EXT2_ROOT_INO, 1); - ext2fs_icount_store(ctx->inode_count, ino, 2); - ext2fs_icount_store(ctx->inode_link_info, ino, 2); - ctx->lost_and_found = ino; -#if 0 - printf("/lost+found created; inode #%lu\n", ino); -#endif - return ino; -} - -/* - * This routine will connect a file to lost+found - */ -int e2fsck_reconnect_file(e2fsck_t ctx, ext2_ino_t ino) -{ - ext2_filsys fs = ctx->fs; - errcode_t retval; - char name[80]; - struct problem_context pctx; - struct ext2_inode inode; - int file_type = 0; - - clear_problem_context(&pctx); - pctx.ino = ino; - - if (!ctx->bad_lost_and_found && !ctx->lost_and_found) { - if (e2fsck_get_lost_and_found(ctx, 1) == 0) - ctx->bad_lost_and_found++; - } - if (ctx->bad_lost_and_found) { - fix_problem(ctx, PR_3_NO_LPF, &pctx); - return 1; - } - - sprintf(name, "#%u", ino); - if (ext2fs_read_inode(fs, ino, &inode) == 0) - file_type = ext2_file_type(inode.i_mode); - retval = ext2fs_link(fs, ctx->lost_and_found, name, ino, file_type); - if (retval == EXT2_ET_DIR_NO_SPACE) { - if (!fix_problem(ctx, PR_3_EXPAND_LF_DIR, &pctx)) - return 1; - retval = e2fsck_expand_directory(ctx, ctx->lost_and_found, - 1, 0); - if (retval) { - pctx.errcode = retval; - fix_problem(ctx, PR_3_CANT_EXPAND_LPF, &pctx); - return 1; - } - retval = ext2fs_link(fs, ctx->lost_and_found, name, - ino, file_type); - } - if (retval) { - pctx.errcode = retval; - fix_problem(ctx, PR_3_CANT_RECONNECT, &pctx); - return 1; - } - e2fsck_adjust_inode_count(ctx, ino, 1); - - return 0; -} - -/* - * Utility routine to adjust the inode counts on an inode. - */ -errcode_t e2fsck_adjust_inode_count(e2fsck_t ctx, ext2_ino_t ino, int adj) -{ - ext2_filsys fs = ctx->fs; - errcode_t retval; - struct ext2_inode inode; - - if (!ino) - return 0; - - retval = ext2fs_read_inode(fs, ino, &inode); - if (retval) - return retval; - -#if 0 - printf("Adjusting link count for inode %lu by %d (from %d)\n", ino, adj, - inode.i_links_count); -#endif - - if (adj == 1) { - ext2fs_icount_increment(ctx->inode_count, ino, 0); - if (inode.i_links_count == (__u16) ~0) - return 0; - ext2fs_icount_increment(ctx->inode_link_info, ino, 0); - inode.i_links_count++; - } else if (adj == -1) { - ext2fs_icount_decrement(ctx->inode_count, ino, 0); - if (inode.i_links_count == 0) - return 0; - ext2fs_icount_decrement(ctx->inode_link_info, ino, 0); - inode.i_links_count--; - } - - retval = ext2fs_write_inode(fs, ino, &inode); - if (retval) - return retval; - - return 0; -} - -/* - * Fix parent --- this routine fixes up the parent of a directory. - */ -struct fix_dotdot_struct { - ext2_filsys fs; - ext2_ino_t parent; - int done; - e2fsck_t ctx; -}; - -static int fix_dotdot_proc(struct ext2_dir_entry *dirent, - int offset EXT2FS_ATTR((unused)), - int blocksize EXT2FS_ATTR((unused)), - char *buf EXT2FS_ATTR((unused)), - void *priv_data) -{ - struct fix_dotdot_struct *fp = (struct fix_dotdot_struct *) priv_data; - errcode_t retval; - struct problem_context pctx; - - if ((dirent->name_len & 0xFF) != 2) - return 0; - if (strncmp(dirent->name, "..", 2)) - return 0; - - clear_problem_context(&pctx); - - retval = e2fsck_adjust_inode_count(fp->ctx, dirent->inode, -1); - if (retval) { - pctx.errcode = retval; - fix_problem(fp->ctx, PR_3_ADJUST_INODE, &pctx); - } - retval = e2fsck_adjust_inode_count(fp->ctx, fp->parent, 1); - if (retval) { - pctx.errcode = retval; - fix_problem(fp->ctx, PR_3_ADJUST_INODE, &pctx); - } - dirent->inode = fp->parent; - - fp->done++; - return DIRENT_ABORT | DIRENT_CHANGED; -} - -static void fix_dotdot(e2fsck_t ctx, struct dir_info *dir, ext2_ino_t parent) -{ - ext2_filsys fs = ctx->fs; - errcode_t retval; - struct fix_dotdot_struct fp; - struct problem_context pctx; - - fp.fs = fs; - fp.parent = parent; - fp.done = 0; - fp.ctx = ctx; - -#if 0 - printf("Fixing '..' of inode %lu to be %lu...\n", dir->ino, parent); -#endif - - retval = ext2fs_dir_iterate(fs, dir->ino, DIRENT_FLAG_INCLUDE_EMPTY, - 0, fix_dotdot_proc, &fp); - if (retval || !fp.done) { - clear_problem_context(&pctx); - pctx.ino = dir->ino; - pctx.errcode = retval; - fix_problem(ctx, retval ? PR_3_FIX_PARENT_ERR : - PR_3_FIX_PARENT_NOFIND, &pctx); - ext2fs_unmark_valid(fs); - } - dir->dotdot = parent; - - return; -} - -/* - * These routines are responsible for expanding a /lost+found if it is - * too small. - */ - -struct expand_dir_struct { - int num; - int guaranteed_size; - int newblocks; - int last_block; - errcode_t err; - e2fsck_t ctx; -}; - -static int expand_dir_proc(ext2_filsys fs, - blk_t *blocknr, - e2_blkcnt_t blockcnt, - blk_t ref_block EXT2FS_ATTR((unused)), - int ref_offset EXT2FS_ATTR((unused)), - void *priv_data) -{ - struct expand_dir_struct *es = (struct expand_dir_struct *) priv_data; - blk_t new_blk; - static blk_t last_blk = 0; - char *block; - errcode_t retval; - e2fsck_t ctx; - - ctx = es->ctx; - - if (es->guaranteed_size && blockcnt >= es->guaranteed_size) - return BLOCK_ABORT; - - if (blockcnt > 0) - es->last_block = blockcnt; - if (*blocknr) { - last_blk = *blocknr; - return 0; - } - retval = ext2fs_new_block(fs, last_blk, ctx->block_found_map, - &new_blk); - if (retval) { - es->err = retval; - return BLOCK_ABORT; - } - if (blockcnt > 0) { - retval = ext2fs_new_dir_block(fs, 0, 0, &block); - if (retval) { - es->err = retval; - return BLOCK_ABORT; - } - es->num--; - retval = ext2fs_write_dir_block(fs, new_blk, block); - } else { - retval = ext2fs_get_mem(fs->blocksize, &block); - if (retval) { - es->err = retval; - return BLOCK_ABORT; - } - memset(block, 0, fs->blocksize); - retval = io_channel_write_blk(fs->io, new_blk, 1, block); - } - if (retval) { - es->err = retval; - return BLOCK_ABORT; - } - ext2fs_free_mem(&block); - *blocknr = new_blk; - ext2fs_mark_block_bitmap(ctx->block_found_map, new_blk); - ext2fs_block_alloc_stats(fs, new_blk, +1); - es->newblocks++; - - if (es->num == 0) - return (BLOCK_CHANGED | BLOCK_ABORT); - else - return BLOCK_CHANGED; -} - -errcode_t e2fsck_expand_directory(e2fsck_t ctx, ext2_ino_t dir, - int num, int guaranteed_size) -{ - ext2_filsys fs = ctx->fs; - errcode_t retval; - struct expand_dir_struct es; - struct ext2_inode inode; - - if (!(fs->flags & EXT2_FLAG_RW)) - return EXT2_ET_RO_FILSYS; - - /* - * Read the inode and block bitmaps in; we'll be messing with - * them. - */ - e2fsck_read_bitmaps(ctx); - - retval = ext2fs_check_directory(fs, dir); - if (retval) - return retval; - - es.num = num; - es.guaranteed_size = guaranteed_size; - es.last_block = 0; - es.err = 0; - es.newblocks = 0; - es.ctx = ctx; - - retval = ext2fs_block_iterate2(fs, dir, BLOCK_FLAG_APPEND, - 0, expand_dir_proc, &es); - - if (es.err) - return es.err; - - /* - * Update the size and block count fields in the inode. - */ - retval = ext2fs_read_inode(fs, dir, &inode); - if (retval) - return retval; - - inode.i_size = (es.last_block + 1) * fs->blocksize; - inode.i_blocks += (fs->blocksize / 512) * es.newblocks; - - e2fsck_write_inode(ctx, dir, &inode, "expand_directory"); - - return 0; -} - |