diff options
Diffstat (limited to 'e2fsck/pass5.c')
| -rw-r--r-- | e2fsck/pass5.c | 958 |
1 files changed, 958 insertions, 0 deletions
diff --git a/e2fsck/pass5.c b/e2fsck/pass5.c new file mode 100644 index 0000000..c1d45a5 --- /dev/null +++ b/e2fsck/pass5.c @@ -0,0 +1,958 @@ +/* + * pass5.c --- check block and inode bitmaps against on-disk bitmaps + * + * Copyright (C) 1993, 1994, 1995, 1996, 1997 Theodore Ts'o. + * + * %Begin-Header% + * This file may be redistributed under the terms of the GNU Public + * License. + * %End-Header% + * + */ + +#include "config.h" +#include <stdint.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/ioctl.h> +#include <fcntl.h> +#include <errno.h> + +#include "e2fsck.h" +#include "problem.h" + +static void check_block_bitmaps(e2fsck_t ctx); +static void check_inode_bitmaps(e2fsck_t ctx); +static void check_inode_end(e2fsck_t ctx); +static void check_block_end(e2fsck_t ctx); +static void check_inode_bitmap_checksum(e2fsck_t ctx); +static void check_block_bitmap_checksum(e2fsck_t ctx); + +void e2fsck_pass5(e2fsck_t ctx) +{ +#ifdef RESOURCE_TRACK + struct resource_track rtrack; +#endif + struct problem_context pctx; + +#ifdef MTRACE + mtrace_print("Pass 5"); +#endif + + init_resource_track(&rtrack, ctx->fs->io); + clear_problem_context(&pctx); + + if (!(ctx->options & E2F_OPT_PREEN)) + fix_problem(ctx, PR_5_PASS_HEADER, &pctx); + + if (ctx->progress) + if ((ctx->progress)(ctx, 5, 0, ctx->fs->group_desc_count*2)) + return; + + e2fsck_read_bitmaps(ctx); + + check_block_bitmaps(ctx); + if (ctx->flags & E2F_FLAG_SIGNAL_MASK) + return; + check_inode_bitmaps(ctx); + if (ctx->flags & E2F_FLAG_SIGNAL_MASK) + return; + check_inode_end(ctx); + if (ctx->flags & E2F_FLAG_SIGNAL_MASK) + return; + check_block_end(ctx); + if (ctx->flags & E2F_FLAG_SIGNAL_MASK) + return; + + check_inode_bitmap_checksum(ctx); + check_block_bitmap_checksum(ctx); + + ext2fs_free_inode_bitmap(ctx->inode_used_map); + ctx->inode_used_map = 0; + ext2fs_free_inode_bitmap(ctx->inode_dir_map); + ctx->inode_dir_map = 0; + ext2fs_free_block_bitmap(ctx->block_found_map); + ctx->block_found_map = 0; + ext2fs_free_block_bitmap(ctx->block_metadata_map); + ctx->block_metadata_map = 0; + + print_resource_track(ctx, _("Pass 5"), &rtrack, ctx->fs->io); +} + +static void check_inode_bitmap_checksum(e2fsck_t ctx) +{ + struct problem_context pctx; + char *buf = NULL; + dgrp_t i; + int nbytes; + ext2_ino_t ino_itr; + errcode_t retval; + + if (!ext2fs_has_feature_metadata_csum(ctx->fs->super)) + return; + + /* If bitmap is dirty from being fixed, checksum will be corrected */ + if (ext2fs_test_ib_dirty(ctx->fs)) + return; + + nbytes = (size_t)(EXT2_INODES_PER_GROUP(ctx->fs->super) / 8); + retval = ext2fs_get_mem(ctx->fs->blocksize, &buf); + if (retval) { + com_err(ctx->program_name, 0, "%s", + _("check_inode_bitmap_checksum: Memory allocation error")); + fatal_error(ctx, 0); + } + + clear_problem_context(&pctx); + for (i = 0; i < ctx->fs->group_desc_count; i++) { + if (ext2fs_bg_flags_test(ctx->fs, i, EXT2_BG_INODE_UNINIT)) + continue; + + ino_itr = 1 + (i * (nbytes << 3)); + retval = ext2fs_get_inode_bitmap_range2(ctx->fs->inode_map, + ino_itr, nbytes << 3, + buf); + if (retval) + break; + + if (ext2fs_inode_bitmap_csum_verify(ctx->fs, i, buf, nbytes)) + continue; + pctx.group = i; + if (!fix_problem(ctx, PR_5_INODE_BITMAP_CSUM_INVALID, &pctx)) + continue; + + /* + * Fixing one checksum will rewrite all of them. The bitmap + * will be checked against the one we made during pass1 for + * discrepancies, and fixed if need be. + */ + ext2fs_mark_ib_dirty(ctx->fs); + break; + } + + ext2fs_free_mem(&buf); +} + +static void check_block_bitmap_checksum(e2fsck_t ctx) +{ + struct problem_context pctx; + char *buf = NULL; + dgrp_t i; + int nbytes; + blk64_t blk_itr; + errcode_t retval; + + if (!ext2fs_has_feature_metadata_csum(ctx->fs->super)) + return; + + /* If bitmap is dirty from being fixed, checksum will be corrected */ + if (ext2fs_test_bb_dirty(ctx->fs)) + return; + + nbytes = (size_t)(EXT2_CLUSTERS_PER_GROUP(ctx->fs->super) / 8); + retval = ext2fs_get_mem(ctx->fs->blocksize, &buf); + if (retval) { + com_err(ctx->program_name, 0, "%s", + _("check_block_bitmap_checksum: Memory allocation error")); + fatal_error(ctx, 0); + } + + clear_problem_context(&pctx); + for (i = 0; i < ctx->fs->group_desc_count; i++) { + if (ext2fs_bg_flags_test(ctx->fs, i, EXT2_BG_BLOCK_UNINIT)) + continue; + + blk_itr = EXT2FS_B2C(ctx->fs, + ctx->fs->super->s_first_data_block) + + ((blk64_t) i * (nbytes << 3)); + retval = ext2fs_get_block_bitmap_range2(ctx->fs->block_map, + blk_itr, nbytes << 3, + buf); + if (retval) + break; + + if (ext2fs_block_bitmap_csum_verify(ctx->fs, i, buf, nbytes)) + continue; + pctx.group = i; + if (!fix_problem(ctx, PR_5_BLOCK_BITMAP_CSUM_INVALID, &pctx)) + continue; + + /* + * Fixing one checksum will rewrite all of them. The bitmap + * will be checked against the one we made during pass1 for + * discrepancies, and fixed if need be. + */ + ext2fs_mark_bb_dirty(ctx->fs); + break; + } + + ext2fs_free_mem(&buf); +} + +static void e2fsck_discard_blocks(e2fsck_t ctx, blk64_t start, + blk64_t count) +{ + ext2_filsys fs = ctx->fs; + + /* + * If the filesystem has changed it means that there was an corruption + * which should be repaired, but in some cases just one e2fsck run is + * not enough to fix the problem, hence it is not safe to run discard + * in this case. + */ + if (ext2fs_test_changed(fs)) + ctx->options &= ~E2F_OPT_DISCARD; + + if ((ctx->options & E2F_OPT_DISCARD) && + (io_channel_discard(fs->io, start, count))) + ctx->options &= ~E2F_OPT_DISCARD; +} + +/* + * This will try to discard number 'count' inodes starting at + * inode number 'start' within the 'group'. Note that 'start' + * is 1-based, it means that we need to adjust it by -1 in this + * function to compute right offset in the particular inode table. + */ +static void e2fsck_discard_inodes(e2fsck_t ctx, dgrp_t group, + ext2_ino_t start, int count) +{ + ext2_filsys fs = ctx->fs; + blk64_t blk, num; + + /* + * Sanity check for 'start' + */ + if ((start < 1) || (start > EXT2_INODES_PER_GROUP(fs->super))) { + printf("PROGRAMMING ERROR: Got start %d outside of group %d!" + " Disabling discard\n", + start, group); + ctx->options &= ~E2F_OPT_DISCARD; + } + + /* + * Do not attempt to discard if E2F_OPT_DISCARD is not set. And also + * skip the discard on this group if discard does not zero data. + * The reason is that if the inode table is not zeroed discard would + * no help us since we need to zero it anyway, or if the inode table + * is zeroed then the read after discard would not be deterministic + * anyway and we would not be able to assume that this inode table + * was zeroed anymore so we would have to zero it again, which does + * not really make sense. + */ + if (!(ctx->options & E2F_OPT_DISCARD) || + !io_channel_discard_zeroes_data(fs->io)) + return; + + /* + * Start is inode number within the group which starts + * counting from 1, so we need to adjust it. + */ + start -= 1; + + /* + * We can discard only blocks containing only unused + * inodes in the table. + */ + blk = DIV_ROUND_UP(start, + EXT2_INODES_PER_BLOCK(fs->super)); + count -= (blk * EXT2_INODES_PER_BLOCK(fs->super) - start); + blk += ext2fs_inode_table_loc(fs, group); + num = count / EXT2_INODES_PER_BLOCK(fs->super); + + if (num > 0) + e2fsck_discard_blocks(ctx, blk, num); +} + +#define NO_BLK ((blk64_t) -1) + +static void print_bitmap_problem(e2fsck_t ctx, problem_t problem, + struct problem_context *pctx) +{ + switch (problem) { + case PR_5_BLOCK_UNUSED: + if (pctx->blk == pctx->blk2) + pctx->blk2 = 0; + else + problem = PR_5_BLOCK_RANGE_UNUSED; + break; + case PR_5_BLOCK_USED: + if (pctx->blk == pctx->blk2) + pctx->blk2 = 0; + else + problem = PR_5_BLOCK_RANGE_USED; + break; + case PR_5_INODE_UNUSED: + if (pctx->ino == pctx->ino2) + pctx->ino2 = 0; + else + problem = PR_5_INODE_RANGE_UNUSED; + break; + case PR_5_INODE_USED: + if (pctx->ino == pctx->ino2) + pctx->ino2 = 0; + else + problem = PR_5_INODE_RANGE_USED; + break; + } + fix_problem(ctx, problem, pctx); + pctx->blk = pctx->blk2 = NO_BLK; + pctx->ino = pctx->ino2 = 0; +} + +/* Just to be more succinct */ +#define B2C(x) EXT2FS_B2C(fs, (x)) +#define EQ_CLSTR(x, y) (B2C(x) == B2C(y)) +#define LE_CLSTR(x, y) (B2C(x) <= B2C(y)) +#define GE_CLSTR(x, y) (B2C(x) >= B2C(y)) + +static void check_block_bitmaps(e2fsck_t ctx) +{ + ext2_filsys fs = ctx->fs; + blk64_t i; + unsigned int *free_array; + dgrp_t g, group = 0; + unsigned int blocks = 0; + blk64_t free_blocks = 0; + blk64_t first_free = ext2fs_blocks_count(fs->super); + unsigned int group_free = 0; + int actual, bitmap; + struct problem_context pctx; + problem_t problem, save_problem; + int fixit, had_problem; + errcode_t retval; + int redo_flag = 0; + char *actual_buf, *bitmap_buf; + + actual_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize, + "actual bitmap buffer"); + bitmap_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize, + "bitmap block buffer"); + + clear_problem_context(&pctx); + free_array = (unsigned int *) e2fsck_allocate_memory(ctx, + fs->group_desc_count * sizeof(unsigned int), "free block count array"); + + if ((B2C(fs->super->s_first_data_block) < + ext2fs_get_block_bitmap_start2(ctx->block_found_map)) || + (B2C(ext2fs_blocks_count(fs->super)-1) > + ext2fs_get_block_bitmap_end2(ctx->block_found_map))) { + pctx.num = 1; + pctx.blk = B2C(fs->super->s_first_data_block); + pctx.blk2 = B2C(ext2fs_blocks_count(fs->super) - 1); + pctx.ino = ext2fs_get_block_bitmap_start2(ctx->block_found_map); + pctx.ino2 = ext2fs_get_block_bitmap_end2(ctx->block_found_map); + fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx); + + ctx->flags |= E2F_FLAG_ABORT; /* fatal */ + goto errout; + } + + if ((B2C(fs->super->s_first_data_block) < + ext2fs_get_block_bitmap_start2(fs->block_map)) || + (B2C(ext2fs_blocks_count(fs->super)-1) > + ext2fs_get_block_bitmap_end2(fs->block_map))) { + pctx.num = 2; + pctx.blk = B2C(fs->super->s_first_data_block); + pctx.blk2 = B2C(ext2fs_blocks_count(fs->super) - 1); + pctx.ino = ext2fs_get_block_bitmap_start2(fs->block_map); + pctx.ino2 = ext2fs_get_block_bitmap_end2(fs->block_map); + fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx); + + ctx->flags |= E2F_FLAG_ABORT; /* fatal */ + goto errout; + } + +redo_counts: + had_problem = 0; + save_problem = 0; + pctx.blk = pctx.blk2 = NO_BLK; + for (i = B2C(fs->super->s_first_data_block); + i < ext2fs_blocks_count(fs->super); + i += EXT2FS_CLUSTER_RATIO(fs)) { + int first_block_in_bg = (B2C(i) - + B2C(fs->super->s_first_data_block)) % + fs->super->s_clusters_per_group == 0; + int n, nbytes = fs->super->s_clusters_per_group / 8; + + actual = ext2fs_fast_test_block_bitmap2(ctx->block_found_map, i); + + /* + * Try to optimize pass5 by extracting a bitmap block + * as expected from what we have on disk, and then + * comparing the two. If they are identical, then + * update the free block counts and go on to the next + * block group. This is much faster than doing the + * individual bit-by-bit comparison. The one downside + * is that this doesn't work if we are asking e2fsck + * to do a discard operation. + */ + if (!first_block_in_bg || + (group == fs->group_desc_count - 1) || + (ctx->options & E2F_OPT_DISCARD)) + goto no_optimize; + + retval = ext2fs_get_block_bitmap_range2(ctx->block_found_map, + B2C(i), fs->super->s_clusters_per_group, + actual_buf); + if (retval) + goto no_optimize; + retval = ext2fs_get_block_bitmap_range2(fs->block_map, + B2C(i), fs->super->s_clusters_per_group, + bitmap_buf); + if (retval) + goto no_optimize; + if (memcmp(actual_buf, bitmap_buf, nbytes) != 0) + goto no_optimize; + n = ext2fs_bitcount(actual_buf, nbytes); + group_free = fs->super->s_clusters_per_group - n; + free_blocks += group_free; + i += EXT2FS_C2B(fs, fs->super->s_clusters_per_group - 1); + goto next_group; + no_optimize: + + if (redo_flag) + bitmap = actual; + else + bitmap = ext2fs_fast_test_block_bitmap2(fs->block_map, i); + + if (!actual == !bitmap) + goto do_counts; + + if (!actual && bitmap) { + /* + * Block not used, but marked in use in the bitmap. + */ + problem = PR_5_BLOCK_UNUSED; + } else { + /* + * Block used, but not marked in use in the bitmap. + */ + problem = PR_5_BLOCK_USED; + + if (ext2fs_bg_flags_test(fs, group, + EXT2_BG_BLOCK_UNINIT)) { + struct problem_context pctx2; + pctx2.blk = i; + pctx2.group = group; + if (fix_problem(ctx, PR_5_BLOCK_UNINIT, + &pctx2)) + ext2fs_bg_flags_clear(fs, group, + EXT2_BG_BLOCK_UNINIT); + } + } + if (pctx.blk == NO_BLK) { + pctx.blk = pctx.blk2 = i; + save_problem = problem; + } else { + if ((problem == save_problem) && + (pctx.blk2 == i - EXT2FS_CLUSTER_RATIO(fs))) + pctx.blk2 += EXT2FS_CLUSTER_RATIO(fs); + else { + print_bitmap_problem(ctx, save_problem, &pctx); + pctx.blk = pctx.blk2 = i; + save_problem = problem; + } + } + ctx->flags |= E2F_FLAG_PROG_SUPPRESS; + had_problem++; + + /* + * If there a problem we should turn off the discard so we + * do not compromise the filesystem. + */ + ctx->options &= ~E2F_OPT_DISCARD; + + do_counts: + if (!bitmap) { + group_free++; + free_blocks++; + if (first_free > i) + first_free = i; + } else if (i > first_free) { + e2fsck_discard_blocks(ctx, first_free, + (i - first_free)); + first_free = ext2fs_blocks_count(fs->super); + } + blocks ++; + if ((blocks == fs->super->s_clusters_per_group) || + (EXT2FS_B2C(fs, i) == + EXT2FS_B2C(fs, ext2fs_blocks_count(fs->super)-1))) { + /* + * If the last block of this group is free, then we can + * discard it as well. + */ + if (!bitmap && i >= first_free) + e2fsck_discard_blocks(ctx, first_free, + (i - first_free) + 1); + next_group: + first_free = ext2fs_blocks_count(fs->super); + + free_array[group] = group_free; + group ++; + blocks = 0; + group_free = 0; + if (ctx->progress) + if ((ctx->progress)(ctx, 5, group, + fs->group_desc_count*2)) + goto errout; + } + } + if (pctx.blk != NO_BLK) + print_bitmap_problem(ctx, save_problem, &pctx); + if (had_problem) + fixit = end_problem_latch(ctx, PR_LATCH_BBITMAP); + else + fixit = -1; + ctx->flags &= ~E2F_FLAG_PROG_SUPPRESS; + + if (fixit == 1) { + ext2fs_free_block_bitmap(fs->block_map); + retval = ext2fs_copy_bitmap(ctx->block_found_map, + &fs->block_map); + if (retval) { + clear_problem_context(&pctx); + fix_problem(ctx, PR_5_COPY_BBITMAP_ERROR, &pctx); + ctx->flags |= E2F_FLAG_ABORT; + goto errout; + } + ext2fs_set_bitmap_padding(fs->block_map); + ext2fs_mark_bb_dirty(fs); + + /* Redo the counts */ + blocks = 0; free_blocks = 0; group_free = 0; group = 0; + memset(free_array, 0, fs->group_desc_count * sizeof(int)); + redo_flag++; + goto redo_counts; + } else if (fixit == 0) + ext2fs_unmark_valid(fs); + + for (g = 0; g < fs->group_desc_count; g++) { + if (free_array[g] != ext2fs_bg_free_blocks_count(fs, g)) { + pctx.group = g; + pctx.blk = ext2fs_bg_free_blocks_count(fs, g); + pctx.blk2 = free_array[g]; + + if (fix_problem(ctx, PR_5_FREE_BLOCK_COUNT_GROUP, + &pctx)) { + ext2fs_bg_free_blocks_count_set(fs, g, free_array[g]); + ext2fs_mark_super_dirty(fs); + } else + ext2fs_unmark_valid(fs); + } + } + free_blocks = EXT2FS_C2B(fs, free_blocks); + if (free_blocks != ext2fs_free_blocks_count(fs->super)) { + pctx.group = 0; + pctx.blk = ext2fs_free_blocks_count(fs->super); + pctx.blk2 = free_blocks; + + if (fix_problem(ctx, PR_5_FREE_BLOCK_COUNT, &pctx)) { + ext2fs_free_blocks_count_set(fs->super, free_blocks); + ext2fs_mark_super_dirty(fs); + } + } +errout: + ext2fs_free_mem(&free_array); + ext2fs_free_mem(&actual_buf); + ext2fs_free_mem(&bitmap_buf); +} + +static void check_inode_bitmaps(e2fsck_t ctx) +{ + ext2_filsys fs = ctx->fs; + ext2_ino_t i; + unsigned int free_inodes = 0; + int group_free = 0; + int dirs_count = 0; + dgrp_t group = 0; + unsigned int inodes = 0; + ext2_ino_t *free_array; + ext2_ino_t *dir_array; + int actual, bitmap; + errcode_t retval; + struct problem_context pctx; + problem_t problem, save_problem; + int fixit, had_problem; + int csum_flag; + int skip_group = 0; + int redo_flag = 0; + ext2_ino_t first_free = fs->super->s_inodes_per_group + 1; + + clear_problem_context(&pctx); + free_array = (ext2_ino_t *) e2fsck_allocate_memory(ctx, + fs->group_desc_count * sizeof(ext2_ino_t), "free inode count array"); + + dir_array = (ext2_ino_t *) e2fsck_allocate_memory(ctx, + fs->group_desc_count * sizeof(ext2_ino_t), "directory count array"); + + if ((1 < ext2fs_get_inode_bitmap_start2(ctx->inode_used_map)) || + (fs->super->s_inodes_count > + ext2fs_get_inode_bitmap_end2(ctx->inode_used_map))) { + pctx.num = 3; + pctx.blk = 1; + pctx.blk2 = fs->super->s_inodes_count; + pctx.ino = ext2fs_get_inode_bitmap_start2(ctx->inode_used_map); + pctx.ino2 = ext2fs_get_inode_bitmap_end2(ctx->inode_used_map); + fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx); + + ctx->flags |= E2F_FLAG_ABORT; /* fatal */ + goto errout; + } + if ((1 < ext2fs_get_inode_bitmap_start2(fs->inode_map)) || + (fs->super->s_inodes_count > + ext2fs_get_inode_bitmap_end2(fs->inode_map))) { + pctx.num = 4; + pctx.blk = 1; + pctx.blk2 = fs->super->s_inodes_count; + pctx.ino = ext2fs_get_inode_bitmap_start2(fs->inode_map); + pctx.ino2 = ext2fs_get_inode_bitmap_end2(fs->inode_map); + fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx); + + ctx->flags |= E2F_FLAG_ABORT; /* fatal */ + goto errout; + } + + csum_flag = ext2fs_has_group_desc_csum(fs); +redo_counts: + had_problem = 0; + save_problem = 0; + pctx.ino = pctx.ino2 = 0; + if (csum_flag && + (ext2fs_bg_flags_test(fs, group, EXT2_BG_INODE_UNINIT))) + skip_group++; + + /* Protect loop from wrap-around if inodes_count is maxed */ + for (i = 1; i <= fs->super->s_inodes_count && i > 0; i++) { + bitmap = 0; + if (skip_group && + i % fs->super->s_inodes_per_group == 1) { + /* + * Current inode is the first inode + * in the current block group. + */ + if (ext2fs_test_inode_bitmap_range( + ctx->inode_used_map, i, + fs->super->s_inodes_per_group)) { + /* + * When the compared inodes in inodes bitmap + * are 0, count the free inode, + * skip the current block group. + */ + first_free = 1; + inodes = fs->super->s_inodes_per_group - 1; + group_free = inodes; + free_inodes += inodes; + i += inodes; + skip_group = 0; + goto do_counts; + } + } + + actual = ext2fs_fast_test_inode_bitmap2(ctx->inode_used_map, i); + if (redo_flag) + bitmap = actual; + else if (!skip_group) + bitmap = ext2fs_fast_test_inode_bitmap2(fs->inode_map, i); + if (!actual == !bitmap) + goto do_counts; + + if (!actual && bitmap) { + /* + * Inode wasn't used, but marked in bitmap + */ + problem = PR_5_INODE_UNUSED; + } else /* if (actual && !bitmap) */ { + /* + * Inode used, but not in bitmap + */ + problem = PR_5_INODE_USED; + + /* We should never hit this, because it means that + * inodes were marked in use that weren't noticed + * in pass1 or pass 2. It is easier to fix the problem + * than to kill e2fsck and leave the user stuck. */ + if (skip_group) { + struct problem_context pctx2; + pctx2.blk = i; + pctx2.group = group; + if (fix_problem(ctx, PR_5_INODE_UNINIT,&pctx2)){ + ext2fs_bg_flags_clear(fs, group, EXT2_BG_INODE_UNINIT); + skip_group = 0; + } + } + } + if (pctx.ino == 0) { + pctx.ino = pctx.ino2 = i; + save_problem = problem; + } else { + if ((problem == save_problem) && + (pctx.ino2 == i-1)) + pctx.ino2++; + else { + print_bitmap_problem(ctx, save_problem, &pctx); + pctx.ino = pctx.ino2 = i; + save_problem = problem; + } + } + ctx->flags |= E2F_FLAG_PROG_SUPPRESS; + had_problem++; + /* + * If there a problem we should turn off the discard so we + * do not compromise the filesystem. + */ + ctx->options &= ~E2F_OPT_DISCARD; + +do_counts: + inodes++; + if (bitmap) { + if (ext2fs_test_inode_bitmap2(ctx->inode_dir_map, i)) + dirs_count++; + if (inodes > first_free) { + e2fsck_discard_inodes(ctx, group, first_free, + inodes - first_free); + first_free = fs->super->s_inodes_per_group + 1; + } + } else { + group_free++; + free_inodes++; + if (first_free > inodes) + first_free = inodes; + } + + if ((inodes == fs->super->s_inodes_per_group) || + (i == fs->super->s_inodes_count)) { + /* + * If the last inode is free, we can discard it as well. + */ + if (!bitmap && inodes >= first_free) + e2fsck_discard_inodes(ctx, group, first_free, + inodes - first_free + 1); + /* + * If discard zeroes data and the group inode table + * was not zeroed yet, set itable as zeroed + */ + if ((ctx->options & E2F_OPT_DISCARD) && + io_channel_discard_zeroes_data(fs->io) && + !(ext2fs_bg_flags_test(fs, group, + EXT2_BG_INODE_ZEROED))) { + ext2fs_bg_flags_set(fs, group, + EXT2_BG_INODE_ZEROED); + ext2fs_group_desc_csum_set(fs, group); + } + + first_free = fs->super->s_inodes_per_group + 1; + free_array[group] = group_free; + dir_array[group] = dirs_count; + group ++; + inodes = 0; + skip_group = 0; + group_free = 0; + dirs_count = 0; + if (ctx->progress) + if ((ctx->progress)(ctx, 5, + group + fs->group_desc_count, + fs->group_desc_count*2)) + goto errout; + if (csum_flag && + (i != fs->super->s_inodes_count) && + (ext2fs_bg_flags_test(fs, group, EXT2_BG_INODE_UNINIT) + )) + skip_group++; + } + } + if (pctx.ino) + print_bitmap_problem(ctx, save_problem, &pctx); + + if (had_problem) + fixit = end_problem_latch(ctx, PR_LATCH_IBITMAP); + else + fixit = -1; + ctx->flags &= ~E2F_FLAG_PROG_SUPPRESS; + + if (fixit == 1) { + ext2fs_free_inode_bitmap(fs->inode_map); + retval = ext2fs_copy_bitmap(ctx->inode_used_map, + &fs->inode_map); + if (retval) { + clear_problem_context(&pctx); + fix_problem(ctx, PR_5_COPY_IBITMAP_ERROR, &pctx); + ctx->flags |= E2F_FLAG_ABORT; + goto errout; + } + ext2fs_set_bitmap_padding(fs->inode_map); + ext2fs_mark_ib_dirty(fs); + + /* redo counts */ + inodes = 0; free_inodes = 0; group_free = 0; + dirs_count = 0; group = 0; + memset(free_array, 0, fs->group_desc_count * sizeof(int)); + memset(dir_array, 0, fs->group_desc_count * sizeof(int)); + redo_flag++; + goto redo_counts; + } else if (fixit == 0) + ext2fs_unmark_valid(fs); + + for (i = 0; i < fs->group_desc_count; i++) { + if (free_array[i] != ext2fs_bg_free_inodes_count(fs, i)) { + pctx.group = i; + pctx.ino = ext2fs_bg_free_inodes_count(fs, i); + pctx.ino2 = free_array[i]; + if (fix_problem(ctx, PR_5_FREE_INODE_COUNT_GROUP, + &pctx)) { + ext2fs_bg_free_inodes_count_set(fs, i, free_array[i]); + ext2fs_mark_super_dirty(fs); + } else + ext2fs_unmark_valid(fs); + } + if (dir_array[i] != ext2fs_bg_used_dirs_count(fs, i)) { + pctx.group = i; + pctx.ino = ext2fs_bg_used_dirs_count(fs, i); + pctx.ino2 = dir_array[i]; + + if (fix_problem(ctx, PR_5_FREE_DIR_COUNT_GROUP, + &pctx)) { + ext2fs_bg_used_dirs_count_set(fs, i, dir_array[i]); + ext2fs_mark_super_dirty(fs); + } else + ext2fs_unmark_valid(fs); + } + } + if (free_inodes != fs->super->s_free_inodes_count) { + pctx.group = -1; + pctx.ino = fs->super->s_free_inodes_count; + pctx.ino2 = free_inodes; + + if (fix_problem(ctx, PR_5_FREE_INODE_COUNT, &pctx)) { + fs->super->s_free_inodes_count = free_inodes; + ext2fs_mark_super_dirty(fs); + } + } +errout: + ext2fs_free_mem(&free_array); + ext2fs_free_mem(&dir_array); +} + +static void check_inode_end(e2fsck_t ctx) +{ + ext2_filsys fs = ctx->fs; + ext2_ino_t end, save_inodes_count, i; + struct problem_context pctx; + int asked = 0; + + clear_problem_context(&pctx); + + end = (__u64)EXT2_INODES_PER_GROUP(fs->super) * fs->group_desc_count; + pctx.errcode = ext2fs_fudge_inode_bitmap_end(fs->inode_map, end, + &save_inodes_count); + if (pctx.errcode) { + pctx.num = 1; + fix_problem(ctx, PR_5_FUDGE_BITMAP_ERROR, &pctx); + ctx->flags |= E2F_FLAG_ABORT; /* fatal */ + return; + } + if (save_inodes_count == end) + goto check_intra_bg_tail; + + /* protect loop from wrap-around if end is maxed */ + for (i = save_inodes_count + 1; i <= end && i > save_inodes_count; i++) { + if (!ext2fs_test_inode_bitmap(fs->inode_map, i)) { + asked = 1; + if (fix_problem(ctx, PR_5_INODE_BMAP_PADDING, &pctx)) { + for (; i <= end; i++) + ext2fs_mark_inode_bitmap(fs->inode_map, + i); + ext2fs_mark_ib_dirty(fs); + } else + ext2fs_unmark_valid(fs); + break; + } + } + + pctx.errcode = ext2fs_fudge_inode_bitmap_end(fs->inode_map, + save_inodes_count, 0); + if (pctx.errcode) { + pctx.num = 2; + fix_problem(ctx, PR_5_FUDGE_BITMAP_ERROR, &pctx); + ctx->flags |= E2F_FLAG_ABORT; /* fatal */ + return; + } + /* + * If the number of inodes per block group != blocksize, we + * can also have a potential problem with the tail bits in + * each individual inode bitmap block. If there is a problem, + * it would have been noticed when the bitmap was loaded. And + * fixing this is easy; all we need to do force the bitmap to + * be written back to disk. + */ +check_intra_bg_tail: + if (!asked && fs->flags & EXT2_FLAG_IBITMAP_TAIL_PROBLEM) { + if (fix_problem(ctx, PR_5_INODE_BMAP_PADDING, &pctx)) + ext2fs_mark_ib_dirty(fs); + else + ext2fs_unmark_valid(fs); + } +} + +static void check_block_end(e2fsck_t ctx) +{ + ext2_filsys fs = ctx->fs; + blk64_t end, save_blocks_count, i; + struct problem_context pctx; + int asked = 0; + + clear_problem_context(&pctx); + + end = ext2fs_get_block_bitmap_start2(fs->block_map) + + EXT2_GROUPS_TO_CLUSTERS(fs->super, fs->group_desc_count) - 1; + pctx.errcode = ext2fs_fudge_block_bitmap_end2(fs->block_map, end, + &save_blocks_count); + if (pctx.errcode) { + pctx.num = 3; + fix_problem(ctx, PR_5_FUDGE_BITMAP_ERROR, &pctx); + ctx->flags |= E2F_FLAG_ABORT; /* fatal */ + return; + } + if (save_blocks_count == end) + goto check_intra_bg_tail; + + /* Protect loop from wrap-around if end is maxed */ + for (i = save_blocks_count + 1; i <= end && i > save_blocks_count; i++) { + if (!ext2fs_test_block_bitmap2(fs->block_map, + EXT2FS_C2B(fs, i))) { + asked = 1; + if (fix_problem(ctx, PR_5_BLOCK_BMAP_PADDING, &pctx)) { + for (; i <= end; i++) + ext2fs_mark_block_bitmap2(fs->block_map, + EXT2FS_C2B(fs, i)); + ext2fs_mark_bb_dirty(fs); + } else + ext2fs_unmark_valid(fs); + break; + } + } + + pctx.errcode = ext2fs_fudge_block_bitmap_end2(fs->block_map, + save_blocks_count, 0); + if (pctx.errcode) { + pctx.num = 4; + fix_problem(ctx, PR_5_FUDGE_BITMAP_ERROR, &pctx); + ctx->flags |= E2F_FLAG_ABORT; /* fatal */ + return; + } + /* + * If the number of blocks per block group != blocksize, we + * can also have a potential problem with the tail bits in + * each individual block bitmap block. If there is a problem, + * it would have been noticed when the bitmap was loaded. And + * fixing this is easy; all we need to do force the bitmap to + * be written back to disk. + */ +check_intra_bg_tail: + if (!asked && fs->flags & EXT2_FLAG_BBITMAP_TAIL_PROBLEM) { + if (fix_problem(ctx, PR_5_BLOCK_BMAP_PADDING, &pctx)) + ext2fs_mark_bb_dirty(fs); + else + ext2fs_unmark_valid(fs); + } +} |