/*
* pass5.c --- check block and inode bitmaps against on-disk bitmaps
- *
- * Copyright (C) 1993, 1994 Theodore Ts'o. This file may be
- * redistributed under the terms of the GNU Public License.
- *
+ *
+ * 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 "et/com_err.h"
+#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(ext2_filsys fs);
-static void check_inode_bitmaps(ext2_filsys fs);
-static void check_inode_end(ext2_filsys fs);
-static void check_block_end(ext2_filsys fs);
+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);
-static int do_fix = -1;
-static const char *fix_question = "Fix summary information";
-
-void pass5(ext2_filsys fs)
+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);
-
- if (!preen)
- printf("Pass 5: Checking group summary information\n");
+ 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);
- read_bitmaps(fs);
+ 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);
- check_block_bitmaps(fs);
- check_inode_bitmaps(fs);
- check_inode_end(fs);
- check_block_end(fs);
+ 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;
- ext2fs_free_inode_bitmap(inode_used_map);
- ext2fs_free_inode_bitmap(inode_dir_map);
- ext2fs_free_block_bitmap(block_found_map);
+ print_resource_track(ctx, _("Pass 5"), &rtrack, ctx->fs->io);
+}
- if (tflag > 1) {
- printf("Pass 5: ");
- print_resource_track(&rtrack);
+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 check_block_bitmaps(ext2_filsys fs)
+static void e2fsck_discard_blocks(e2fsck_t ctx, blk64_t start,
+ blk64_t count)
{
- blk_t i;
- int *free_array;
- int group = 0;
- int blocks = 0;
- int free_blocks = 0;
- int group_free = 0;
+ 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;
- const char *print_header = "Block bitmap differences:";
-
- free_array = allocate_memory(fs->group_desc_count * sizeof(int),
- "free block count array");
-
- for (i = fs->super->s_first_data_block;
- i < fs->super->s_blocks_count;
- i++) {
- actual = ext2fs_test_block_bitmap(block_found_map, i);
- bitmap = ext2fs_test_block_bitmap(fs->block_map, i);
-
- if (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 (do_fix < 0)
- do_fix = ask(fix_question, 1);
- if (!preen && print_header) {
- printf(print_header);
- print_header = 0;
- }
if (!actual && bitmap) {
/*
* Block not used, but marked in use in the bitmap.
*/
- if (!preen)
- printf(" -%lu", i);
- if (do_fix)
- ext2fs_unmark_block_bitmap(fs->block_map,
- i);
+ problem = PR_5_BLOCK_UNUSED;
} else {
/*
* Block used, but not marked in use in the bitmap.
*/
- if (!preen)
- printf(" +%lu", i);
- if (do_fix)
- ext2fs_mark_block_bitmap(fs->block_map,
- i);
+ 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 (do_fix) {
- ext2fs_mark_bb_dirty(fs);
- bitmap = actual;
- } else
- ext2fs_unmark_valid(fs);
-
+ 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_blocks_per_group) ||
- (i == fs->super->s_blocks_count-1)) {
+ 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 (!print_header)
- printf(". %s\n", fix_msg[do_fix]);
- for (i = 0; i < fs->group_desc_count; i++) {
- if (free_array[i] != fs->group_desc[i].bg_free_blocks_count) {
- if (do_fix < 0)
- do_fix = ask(fix_question, 1);
- if (!preen)
- printf("Free blocks count wrong for "
- "group %lu (%u, counted=%d). %s\n", i,
- fs->group_desc[i].bg_free_blocks_count,
- free_array[i], fix_msg[do_fix]);
- if (do_fix) {
- fs->group_desc[i].bg_free_blocks_count =
- free_array[i];
+ 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);
}
}
- if (free_blocks != fs->super->s_free_blocks_count) {
- if (do_fix < 0)
- do_fix = ask(fix_question, 1);
- if (!preen)
- printf("Free blocks count wrong "
- "(%lu, counted=%d). %s\n",
- fs->super->s_free_blocks_count, free_blocks,
- fix_msg[do_fix]);
- if (do_fix) {
- fs->super->s_free_blocks_count = free_blocks;
+ 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);
- } else
- ext2fs_unmark_valid(fs);
+ }
}
+errout:
+ ext2fs_free_mem(&free_array);
+ ext2fs_free_mem(&actual_buf);
+ ext2fs_free_mem(&bitmap_buf);
}
-
-static void check_inode_bitmaps(ext2_filsys fs)
+
+static void check_inode_bitmaps(e2fsck_t ctx)
{
- ino_t i;
- int free_inodes = 0;
- int group_free = 0;
- int dirs_count = 0;
- int group = 0;
- int inodes = 0;
- int *free_array;
- int *dir_array;
- int actual, bitmap;
- const char *print_header = "Inode bitmap differences:";
-
- free_array = allocate_memory(fs->group_desc_count * sizeof(int),
- "free inode count array");
-
- dir_array = allocate_memory(fs->group_desc_count * sizeof(int),
- "directory count array");
-
- for (i = 1; i <= fs->super->s_inodes_count; i++) {
- actual = ext2fs_test_inode_bitmap(inode_used_map, i);
- bitmap = ext2fs_test_inode_bitmap(fs->inode_map, i);
-
- if (actual == bitmap)
- goto do_counts;
-
- if (do_fix < 0)
- do_fix = ask(fix_question, 1);
- if (!preen && print_header) {
- printf(print_header);
- print_header = 0;
+ 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
*/
- if (!preen)
- printf(" -%lu", i);
- if (do_fix)
- ext2fs_unmark_inode_bitmap(fs->inode_map, i);
- } else if (actual && !bitmap) {
+ problem = PR_5_INODE_UNUSED;
+ } else /* if (actual && !bitmap) */ {
/*
* Inode used, but not in bitmap
*/
- if (!preen)
- printf (" +%lu", i);
- if (do_fix)
- ext2fs_mark_inode_bitmap(fs->inode_map, i);
+ 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 (do_fix) {
- ext2fs_mark_ib_dirty(fs);
- bitmap = actual;
- } else
- ext2fs_unmark_valid(fs);
-
+ 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:
- if (!bitmap) {
+ 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++;
- } else {
- if (ext2fs_test_inode_bitmap(inode_dir_map, i))
- dirs_count++;
+ if (first_free > inodes)
+ first_free = inodes;
}
- 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 (!print_header)
- printf(". %s\n", fix_msg[do_fix]);
-
+ 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] != fs->group_desc[i].bg_free_inodes_count) {
- if (do_fix < 0)
- do_fix = ask(fix_question, 1);
- if (!preen)
- printf ("Free inodes count wrong for "
- "group #%lu (%u, counted=%d). %s\n", i,
- fs->group_desc[i].bg_free_inodes_count,
- free_array[i], fix_msg[do_fix]);
- if (do_fix) {
- fs->group_desc[i].bg_free_inodes_count =
- free_array[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] != fs->group_desc[i].bg_used_dirs_count) {
- if (do_fix < 0)
- do_fix = ask(fix_question, 1);
- if (!preen)
- printf ("Directories count wrong for "
- "group #%lu (%u, counted=%d). %s\n", i,
- fs->group_desc[i].bg_used_dirs_count,
- dir_array[i], fix_msg[do_fix]);
- if (do_fix) {
- fs->group_desc[i].bg_used_dirs_count =
- dir_array[i];
+ 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) {
- if (do_fix < 0)
- do_fix = ask(fix_question, 1);
- if (!preen)
- printf("Free inodes count wrong "
- "(%lu, counted=%d). %s\n",
- fs->super->s_free_inodes_count, free_inodes,
- fix_msg[do_fix]);
- if (do_fix) {
+ 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);
- } else
- ext2fs_unmark_valid(fs);
+ }
}
+errout:
+ ext2fs_free_mem(&free_array);
+ ext2fs_free_mem(&dir_array);
}
-static void check_inode_end(ext2_filsys fs)
+static void check_inode_end(e2fsck_t ctx)
{
- ino_t end, save_inodes_count, i;
- errcode_t retval;
+ ext2_filsys fs = ctx->fs;
+ ext2_ino_t end, save_inodes_count, i;
+ struct problem_context pctx;
+ int asked = 0;
- end = EXT2_INODES_PER_GROUP(fs->super) * fs->group_desc_count;
- retval = ext2fs_fudge_inode_bitmap_end(fs->inode_map, end,
- &save_inodes_count);
- if (retval) {
- com_err("check_inode_end", retval,
- "while trying to fudge end of inode bitmap");
- fatal_error(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)
- return;
-
- for (i = save_inodes_count + 1; i <= end; i++) {
+ 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)) {
- printf("Padding at end of inode bitmap is not set. ");
- if (ask("Fix", 1)) {
- for (i = save_inodes_count + 1; i <= end; 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);
}
}
- retval = ext2fs_fudge_inode_bitmap_end(fs->inode_map,
- save_inodes_count, 0);
- if (retval) {
- com_err("check_inode_end", retval,
- "while trying to fudge end of inode bitmap back");
- fatal_error(0);
+ 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(ext2_filsys fs)
+static void check_block_end(e2fsck_t ctx)
{
- blk_t end, save_blocks_count, i;
- errcode_t retval;
+ ext2_filsys fs = ctx->fs;
+ blk64_t end, save_blocks_count, i;
+ struct problem_context pctx;
+ int asked = 0;
- end = fs->block_map->start +
- (EXT2_BLOCKS_PER_GROUP(fs->super) * fs->group_desc_count) - 1;
- retval = ext2fs_fudge_block_bitmap_end(fs->block_map, end,
- &save_blocks_count);
- if (retval) {
- com_err("check_block_end", retval,
- "while trying to fudge end of block bitmap");
- fatal_error(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)
- return;
-
- for (i = save_blocks_count + 1; i <= end; i++) {
- if (!ext2fs_test_block_bitmap(fs->block_map, i)) {
- printf("Padding at end of block bitmap is not set. ");
-
- if (ask("Fix", 1)) {
- for (i = save_blocks_count + 1; i < end; i++)
- ext2fs_mark_block_bitmap(fs->block_map,
- i);
+ 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);
}
}
- retval = ext2fs_fudge_block_bitmap_end(fs->block_map,
- save_blocks_count, 0);
- if (retval) {
- com_err("check_block_end", retval,
- "while trying to fudge end of block bitmap back");
- fatal_error(0);
+ 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);
}
}
-
git://git.whamcloud.com / tools / e2fsprogs.git / blobdiff