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e2fsprogs/e2fsck/pass1.c

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/*
* pass1.c -- pass #1 of e2fsck: sequential scan of the inode table
*
* Copyright (C) 1993, 1994 Theodore Ts'o. This file may be
* redistributed under the terms of the GNU Public License.
*
* Pass 1 of e2fsck iterates over all the inodes in the filesystems,
* and applies the following tests to each inode:
*
* - The mode field of the inode must be legal.
* - The size and block count fields of the inode are correct.
* - A data block must not be used by another inode
*
* Pass 1 also gathers the collects the following information:
*
* - A bitmap of which inodes are in use. (inode_used_map)
* - A bitmap of which inodes are directories. (inode_dir_map)
* - A bitmap of which inodes have bad fields. (inode_bad_map)
* - A bitmap of which blocks are in use. (block_found_map)
* - A bitmap of which blocks are in use by two inodes (block_dup_map)
* - The data blocks of the directory inodes. (dir_map)
*
* Pass 1 is designed to stash away enough information so that the
* other passes should not need to read in the inode information
* during the normal course of a filesystem check. (Althogh if an
* inconsistency is detected, other passes may need to read in an
* inode to fix it.)
*
* Note that pass 1B will be invoked if there are any duplicate blocks
* found.
*/
#include <time.h>
#include <et/com_err.h>
#include "e2fsck.h"
/* Files counts */
int fs_directory_count = 0;
int fs_regular_count = 0;
int fs_blockdev_count = 0;
int fs_chardev_count = 0;
int fs_links_count = 0;
int fs_symlinks_count = 0;
int fs_fast_symlinks_count = 0;
int fs_fifo_count = 0;
int fs_total_count = 0;
int fs_badblocks_count = 0;
int fs_sockets_count = 0;
ext2fs_inode_bitmap inode_used_map = 0; /* Inodes which are in use */
ext2fs_inode_bitmap inode_bad_map = 0; /* Inodes which are bad in some way */
ext2fs_inode_bitmap inode_dir_map = 0; /* Inodes which are directories */
ext2fs_block_bitmap block_found_map = 0;
ext2fs_block_bitmap block_dup_map = 0;
static int fix_link_count = -1;
unsigned short * inode_link_info = NULL;
static int process_block(ext2_filsys fs, blk_t *blocknr,
int blockcnt, void *private);
static int process_bad_block(ext2_filsys fs, blk_t *block_nr,
int blockcnt, void *private);
static void check_blocks(ext2_filsys fs, ino_t ino, struct ext2_inode *inode,
char *block_buf);
static void mark_table_blocks(ext2_filsys fs);
static errcode_t pass1_check_directory(ext2_filsys fs, ino_t ino);
static errcode_t pass1_get_blocks(ext2_filsys fs, ino_t ino, blk_t *blocks);
static void alloc_bad_map(ext2_filsys fs);
static void handle_fs_bad_blocks(ext2_filsys fs);
static void process_inodes(ext2_filsys fs, char *block_buf);
static int process_inode_cmp(const void *a, const void *b);
static int dir_block_cmp(const void *a, const void *b);
static errcode_t scan_callback(ext2_filsys fs, ext2_inode_scan scan,
dgrp_t group, void * private);
struct process_block_struct {
ino_t ino;
int is_dir:1, clear:1, suppress:1;
int num_blocks;
int last_block;
int num_illegal_blocks;
int fix;
struct ext2_inode *inode;
};
struct process_inode_block {
ino_t ino;
struct ext2_inode inode;
};
/*
* For pass1_check_directory and pass1_get_blocks
*/
ino_t stashed_ino;
struct ext2_inode *stashed_inode;
/*
* For the inodes to process list.
*/
static struct process_inode_block *inodes_to_process;
static int process_inode_count;
int process_inode_size = 256;
/*
* For the directory blocks list.
*/
struct dir_block_struct *dir_blocks = 0;
int dir_block_count = 0;
int dir_block_size = 0;
/*
* Free all memory allocated by pass1 in preparation for restarting
* things.
*/
static void unwind_pass1(ext2_filsys fs)
{
ext2fs_free_inode_bitmap(inode_used_map); inode_used_map = 0;
ext2fs_free_inode_bitmap(inode_dir_map); inode_dir_map = 0;
ext2fs_free_block_bitmap(block_found_map); block_found_map = 0;
free(inode_link_info); inode_link_info = 0;
free(inodes_to_process);inodes_to_process = 0;
free(dir_blocks); dir_blocks = 0;
dir_block_size = 0;
if (block_dup_map) {
free(block_dup_map); block_dup_map = 0;
}
/* Clear statistic counters */
fs_directory_count = 0;
fs_regular_count = 0;
fs_blockdev_count = 0;
fs_chardev_count = 0;
fs_links_count = 0;
fs_symlinks_count = 0;
fs_fast_symlinks_count = 0;
fs_fifo_count = 0;
fs_total_count = 0;
fs_badblocks_count = 0;
fs_sockets_count = 0;
}
void pass1(ext2_filsys fs)
{
ino_t ino;
struct ext2_inode inode;
ext2_inode_scan scan;
char *block_buf;
errcode_t retval;
struct resource_track rtrack;
init_resource_track(&rtrack);
if (!preen)
printf("Pass 1: Checking inodes, blocks, and sizes\n");
#ifdef MTRACE
mtrace_print("Pass 1");
#endif
/*
* Allocate bitmaps structures
*/
retval = ext2fs_allocate_inode_bitmap(fs, "in-use inode map",
&inode_used_map);
if (retval) {
com_err("ext2fs_allocate_inode_bitmap", retval,
"while allocating inode_used_map");
fatal_error(0);
}
retval = ext2fs_allocate_inode_bitmap(fs, "directory inode map",
&inode_dir_map);
if (retval) {
com_err("ext2fs_allocate_inode_bitmap", retval,
"while allocating inode_dir_map");
fatal_error(0);
}
retval = ext2fs_allocate_block_bitmap(fs, "in-use block map",
&block_found_map);
if (retval) {
com_err("ext2fs_allocate_block_bitmap", retval,
"while allocating block_found_map");
fatal_error(0);
}
inode_link_info = allocate_memory((fs->super->s_inodes_count + 1) *
sizeof(unsigned short),
"inode link count array");
inodes_to_process = allocate_memory(process_inode_size *
sizeof(struct process_inode_block),
"array of inodes to process");
process_inode_count = 0;
dir_block_size = get_num_dirs(fs) * 4;
dir_block_count = 0;
dir_blocks = allocate_memory(sizeof(struct dir_block_struct) *
dir_block_size,
"directory block information");
mark_table_blocks(fs);
block_buf = allocate_memory(fs->blocksize * 3, "block interate buffer");
fs->get_blocks = pass1_get_blocks;
fs->check_directory = pass1_check_directory;
ehandler_operation("doing inode scan");
retval = ext2fs_open_inode_scan(fs, inode_buffer_blocks, &scan);
if (retval) {
com_err(program_name, retval, "while opening inode scan");
fatal_error(0);
}
retval = ext2fs_get_next_inode(scan, &ino, &inode);
if (retval) {
com_err(program_name, retval, "while starting inode scan");
fatal_error(0);
}
stashed_inode = &inode;
ext2fs_set_inode_callback(scan, scan_callback, block_buf);
while (ino) {
stashed_ino = ino;
inode_link_info[ino] = inode.i_links_count;
if (ino == EXT2_BAD_INO) {
struct process_block_struct pb;
pb.ino = EXT2_BAD_INO;
pb.num_blocks = pb.last_block = 0;
pb.num_illegal_blocks = 0;
pb.suppress = pb.clear = pb.is_dir = 0;
pb.fix = -1;
pb.inode = &inode;
retval = ext2fs_block_iterate(fs, ino, 0, block_buf,
process_bad_block, &pb);
if (retval)
com_err(program_name, retval, "while calling e2fsc_block_interate in pass 1");
ext2fs_mark_inode_bitmap(inode_used_map, ino);
goto next;
}
if (ino == EXT2_ROOT_INO) {
/*
* Make sure the root inode is a directory; if
* not, offer to clear it. It will be
* regnerated in pass #3.
*/
if (!S_ISDIR(inode.i_mode)) {
printf("Root inode is not a directory. ");
preenhalt();
if (ask("Clear", 1)) {
inode.i_dtime = time(0);
inode.i_links_count = 0;
inode_link_info[ino] = 0;
e2fsck_write_inode(fs, ino, &inode,
"pass1");
} else
ext2fs_unmark_valid(fs);
}
/*
* If dtime is set, offer to clear it. mke2fs
* version 0.2b created filesystems with the
* dtime field set for the root and lost+found
* directories. We won't worry about
* /lost+found, since that can be regenerated
* easily. But we will fix the root directory
* as a special case.
*/
if (inode.i_dtime && inode.i_links_count) {
if (ask("Root inode has dtime set "
"(probably due to old mke2fs). Fix",
1)) {
inode.i_dtime = 0;
e2fsck_write_inode(fs, ino, &inode,
"pass1");
printf("Note: /lost+found will "
"probably be deleted as well, "
"due to the mke2fs bug.\n"
"Be sure to run mklost+found "
"to recreate it after e2fsck "
"finishes.\n\n");
} else
ext2fs_unmark_valid(fs);
}
}
if ((ino != EXT2_ROOT_INO) && (ino < EXT2_FIRST_INO)) {
ext2fs_mark_inode_bitmap(inode_used_map, ino);
check_blocks(fs, ino, &inode, block_buf);
goto next;
}
/*
* This code assumes that deleted inodes have
* i_links_count set to 0.
*/
if (!inode.i_links_count) {
if (!inode.i_dtime && inode.i_mode) {
printf("Deleted inode %lu has zero dtime.\n",
ino);
if (ask("Set dtime", 1)) {
inode.i_dtime = time(0);
e2fsck_write_inode(fs, ino, &inode,
"pass1");
} else
ext2fs_unmark_valid(fs);
}
goto next;
}
/*
* 0.3c ext2fs code didn't clear i_links_count for
* deleted files. Oops.
*
* In the future, when the new ext2fs behavior is the
* norm, we may want to handle the case of a non-zero
* i_links_count and non-zero dtime by clearing dtime
* and assuming the inode is in use, instead of
* assuming the inode is not in use.
*/
if (inode.i_dtime) {
if (fix_link_count == -1) {
printf("\nDeleted inode detected with non-zero link count.\n");
printf("This is probably due to old ext2fs kernel code. \n");
fix_link_count = ask("Fix inode(s)", 1);
}
printf("Inode %lu is deleted w/ non-zero link_count. %s\n",
ino, clear_msg[fix_link_count]);
if (fix_link_count) {
inode.i_links_count = 0;
inode_link_info[ino] = 0;
e2fsck_write_inode(fs, ino, &inode, "pass1");
} else
ext2fs_unmark_valid(fs);
goto next;
}
ext2fs_mark_inode_bitmap(inode_used_map, ino);
if (inode.i_faddr || inode.i_frag || inode.i_fsize ||
inode.i_file_acl || inode.i_dir_acl) {
if (!inode_bad_map)
alloc_bad_map(fs);
ext2fs_mark_inode_bitmap(inode_bad_map, ino);
}
if (S_ISDIR(inode.i_mode)) {
ext2fs_mark_inode_bitmap(inode_dir_map, ino);
add_dir_info(fs, ino, 0, &inode);
fs_directory_count++;
} else if (S_ISREG (inode.i_mode))
fs_regular_count++;
else if (S_ISCHR (inode.i_mode))
fs_chardev_count++;
else if (S_ISBLK (inode.i_mode))
fs_blockdev_count++;
else if (S_ISLNK (inode.i_mode)) {
fs_symlinks_count++;
if (!inode.i_blocks)
fs_fast_symlinks_count++;
}
else if (S_ISFIFO (inode.i_mode))
fs_fifo_count++;
else if (S_ISSOCK (inode.i_mode))
fs_sockets_count++;
else {
if (!inode_bad_map)
alloc_bad_map(fs);
ext2fs_mark_inode_bitmap(inode_bad_map, ino);
}
if (inode.i_block[EXT2_IND_BLOCK] ||
inode.i_block[EXT2_DIND_BLOCK] ||
inode.i_block[EXT2_TIND_BLOCK]) {
inodes_to_process[process_inode_count].ino = ino;
inodes_to_process[process_inode_count].inode = inode;
process_inode_count++;
} else
check_blocks(fs, ino, &inode, block_buf);
if (process_inode_count >= process_inode_size)
process_inodes(fs, block_buf);
next:
retval = ext2fs_get_next_inode(scan, &ino, &inode);
if (retval) {
com_err(program_name, retval,
"while doing inode scan");
fatal_error(0);
}
}
process_inodes(fs, block_buf);
ext2fs_close_inode_scan(scan);
ehandler_operation(0);
qsort(dir_blocks, dir_block_count, sizeof(struct dir_block_struct),
dir_block_cmp);
if (invalid_bitmaps)
handle_fs_bad_blocks(fs);
if (restart_e2fsck) {
unwind_pass1(fs);
goto endit;
}
if (block_dup_map) {
if (preen) {
printf("Duplicate or bad blocks in use!\n");
preenhalt();
}
pass1_dupblocks(fs, block_buf);
}
fs->get_blocks = 0;
fs->check_directory = 0;
free(inodes_to_process);
endit:
free(block_buf);
if (tflag > 1) {
printf("Pass 1: ");
print_resource_track(&rtrack);
}
}
/*
* When the inode_scan routines call this callback at the end of the
* glock group, call process_inodes.
*/
static errcode_t scan_callback(ext2_filsys fs, ext2_inode_scan scan,
dgrp_t group, void * private)
{
process_inodes(fs, (char *) private);
return 0;
}
/*
* Process the inodes in the "inodes to process" list.
*/
static void process_inodes(ext2_filsys fs, char *block_buf)
{
int i;
struct ext2_inode *old_stashed_inode;
ino_t ino;
const char *old_operation;
char buf[80];
#if 0
printf("begin process_inodes: ");
#endif
old_operation = ehandler_operation(0);
old_stashed_inode = stashed_inode;
qsort(inodes_to_process, process_inode_count,
sizeof(struct process_inode_block), process_inode_cmp);
for (i=0; i < process_inode_count; i++) {
stashed_inode = &inodes_to_process[i].inode;
ino = inodes_to_process[i].ino;
stashed_ino = ino;
#if 0
printf("%lu ", ino);
#endif
sprintf(buf, "reading indirect blocks of inode %lu", ino);
ehandler_operation(buf);
check_blocks(fs, ino, stashed_inode, block_buf);
}
stashed_inode = old_stashed_inode;
process_inode_count = 0;
#if 0
printf("end process inodes\n");
#endif
ehandler_operation(old_operation);
}
static int process_inode_cmp(const void *a, const void *b)
{
const struct process_inode_block *ib_a =
(const struct process_inode_block *) a;
const struct process_inode_block *ib_b =
(const struct process_inode_block *) b;
return (ib_a->inode.i_block[EXT2_IND_BLOCK] -
ib_b->inode.i_block[EXT2_IND_BLOCK]);
}
static int dir_block_cmp(const void *a, const void *b)
{
const struct dir_block_struct *db_a =
(const struct dir_block_struct *) a;
const struct dir_block_struct *db_b =
(const struct dir_block_struct *) b;
return (db_a->blk - db_b->blk);
}
/*
* This procedure will allocate the inode bad map table
*/
static void alloc_bad_map(ext2_filsys fs)
{
errcode_t retval;
retval = ext2fs_allocate_inode_bitmap(fs, "bad inode map",
&inode_bad_map);
if (retval) {
com_err("ext2fs_allocate_inode_bitmap", retval,
"while allocating inode_bad_map");
fatal_error(0);
}
}
/*
* Marks a block as in use, setting the dup_map if it's been set
* already. Called by process_block and process_bad_block.
*/
static void mark_block_used(ext2_filsys fs, blk_t block)
{
errcode_t retval;
if (ext2fs_test_block_bitmap(block_found_map, block)) {
if (!block_dup_map) {
retval = ext2fs_allocate_block_bitmap(fs,
"multiply claimed block map", &block_dup_map);
if (retval) {
com_err("ext2fs_allocate_block_bitmap", retval,
"while allocating block_dup_map");
fatal_error(0);
}
}
ext2fs_mark_block_bitmap(block_dup_map, block);
} else {
ext2fs_mark_block_bitmap(block_found_map, block);
}
}
/*
* This subroutine is called on each inode to account for all of the
* blocks used by that inode.
*/
static void check_blocks(ext2_filsys fs, ino_t ino, struct ext2_inode *inode,
char *block_buf)
{
struct process_block_struct pb;
errcode_t retval;
if (!inode_has_valid_blocks(inode))
return;
pb.ino = ino;
pb.num_blocks = pb.last_block = 0;
pb.num_illegal_blocks = 0;
pb.suppress = pb.clear = 0;
pb.is_dir = S_ISDIR(inode->i_mode);
pb.fix = -1;
pb.inode = inode;
retval = ext2fs_block_iterate(fs, ino, 0, block_buf,
process_block, &pb);
if (retval)
com_err(program_name, retval,
"while calling ext2fs_block_iterate in check_blocks");
if (pb.clear) {
e2fsck_read_inode(fs, ino, inode, "check_blocks");
if (retval) {
com_err("check_blocks", retval,
"while reading to be cleared inode %d", ino);
fatal_error(0);
}
inode->i_links_count = 0;
inode_link_info[ino] = 0;
inode->i_dtime = time(0);
e2fsck_write_inode(fs, ino, inode, "check_blocks");
ext2fs_unmark_inode_bitmap(inode_dir_map, ino);
ext2fs_unmark_inode_bitmap(inode_used_map, ino);
/*
* The inode was probably partially accounted for
* before processing was aborted, so we need to
* restart the pass 1 scan.
*/
restart_e2fsck++;
return;
}
if (pb.fix > 0)
e2fsck_read_inode(fs, ino, inode, "check_blocks");
pb.num_blocks *= (fs->blocksize / 512);
#if 0
printf("inode %lu, i_size = %lu, last_block = %lu, i_blocks=%lu, num_blocks = %lu\n",
ino, inode->i_size, pb.last_block, inode->i_blocks,
pb.num_blocks);
#endif
if (!pb.num_blocks && pb.is_dir) {
printf("Inode %lu is a zero length directory. ", ino);
if (ask("Clear", 1)) {
inode->i_links_count = 0;
inode_link_info[ino] = 0;
inode->i_dtime = time(0);
e2fsck_write_inode(fs, ino, inode, "check_blocks");
ext2fs_unmark_inode_bitmap(inode_dir_map, ino);
ext2fs_unmark_inode_bitmap(inode_used_map, ino);
fs_directory_count--;
} else
ext2fs_unmark_valid(fs);
}
if (inode->i_size < pb.last_block * fs->blocksize) {
printf ("Inode %lu, incorrect size, %lu (counted = %u). ",
ino, inode->i_size,
(pb.last_block+1) * fs->blocksize);
if (ask ("Set size to counted", 1)) {
inode->i_size = (pb.last_block+1) * fs->blocksize;
e2fsck_write_inode(fs, ino, inode, "check_blocks");
} else
ext2fs_unmark_valid(fs);
}
if (pb.num_blocks != inode->i_blocks) {
printf ("Inode %lu, i_blocks wrong %lu (counted=%u). ",
ino, inode->i_blocks, pb.num_blocks);
if (ask ("Set i_blocks to counted", 1)) {
inode->i_blocks = pb.num_blocks;
e2fsck_write_inode(fs, ino, inode, "check_blocks");
} else
ext2fs_unmark_valid(fs);
}
}
/*
* This is a helper function for check_blocks().
*/
int process_block(ext2_filsys fs,
blk_t *block_nr,
int blockcnt,
void *private)
{
struct process_block_struct *p;
int group;
int illegal_block = 0;
char problem[80];
blk_t firstblock, group_super;
blk_t blk = *block_nr;
if (!blk)
return 0;
p = (struct process_block_struct *) private;
#if 0
printf("Process_block, inode %lu, block %lu, #%d\n", p->ino, blk,
blockcnt);
#endif
firstblock = fs->super->s_first_data_block;
group = (blk - firstblock) / fs->super->s_blocks_per_group;
group_super = ((group * fs->super->s_blocks_per_group) +
fs->super->s_first_data_block);
if (blk < firstblock) {
sprintf(problem, "< FIRSTBLOCK (%lu)", firstblock);
illegal_block++;
} else if (blk >= fs->super->s_blocks_count) {
sprintf(problem, "> BLOCKS (%lu)", fs->super->s_blocks_count);
illegal_block++;
} else if (blk == group_super) {
sprintf(problem, "is the superblock in group %d", group);
illegal_block++;
} else if (blk > group_super &&
blk <= (group_super + fs->desc_blocks)) {
sprintf(problem, "is in the group descriptors in group %d",
group);
illegal_block++;
} else if (blk == fs->group_desc[group].bg_block_bitmap) {
sprintf(problem, "is the block bitmap of group %d", group);
illegal_block++;
} else if (blk == fs->group_desc[group].bg_inode_bitmap) {
sprintf(problem, "is the inode bitmap of group %d", group);
illegal_block++;
} else if (blk >= fs->group_desc[group].bg_inode_table &&
blk < fs->group_desc[group].bg_inode_table + fs->inode_blocks_per_group) {
sprintf(problem, "is in the inode table of group %d", group);
illegal_block++;
}
if (illegal_block) {
if (preen) {
printf("Block %lu of inode %lu %s\n", blk, p->ino,
problem);
preenhalt();
}
if (p->fix == -1) {
printf("Remove illegal block(s) in inode %lu", p->ino);
p->fix = ask("", 1);
}
p->num_illegal_blocks++;
if (!p->suppress && (p->num_illegal_blocks % 20) == 0) {
printf("Too many illegal blocks in inode %lu.\n",
p->ino);
if (ask("Clear inode", 1)) {
p->clear = 1;
return BLOCK_ABORT;
}
if (ask("Supress messages", 0)) {
p->suppress = 1;
}
}
if (!p->suppress)
printf("Block #%d (%lu) %s. %s\n", blockcnt, blk,
problem, clear_msg[p->fix]);
if (p->fix) {
*block_nr = 0;
return BLOCK_CHANGED;
} else {
ext2fs_unmark_valid(fs);
return 0;
}
}
p->num_blocks++;
if (blockcnt > 0)
p->last_block = blockcnt;
mark_block_used(fs, blk);
if (p->is_dir && (blockcnt >= 0)) {
if (dir_block_count >= dir_block_size) {
dir_block_size += 100;
dir_blocks = realloc(dir_blocks,
dir_block_size *
sizeof(struct dir_block_struct));
}
dir_blocks[dir_block_count].blk = blk;
dir_blocks[dir_block_count].ino = p->ino;
dir_blocks[dir_block_count].blockcnt = blockcnt;
dir_block_count++;
}
#if 0
printf("process block, inode %lu, block #%d is %lu\n",
p->ino, blockcnt, blk);
#endif
return 0;
}
static void bad_block_indirect(blk_t blk)
{
printf("Bad block %lu used as bad block indirect block?!?\n", blk);
preenhalt();
printf("\nThis inconsistency can not be fixed with "
"e2fsck; to fix it, use\n"
"""dumpe2fs -b"" to dump out the bad block "
"list and ""e2fsck -L filename""\n"
"to read it back in again.\n");
if (ask("Continue", 0))
return;
fatal_error(0);
}
int process_bad_block(ext2_filsys fs,
blk_t *block_nr,
int blockcnt,
void *private)
{
struct process_block_struct *p;
blk_t blk = *block_nr;
int first_block;
int i;
if (!blk)
return 0;
p = (struct process_block_struct *) private;
if ((blk < fs->super->s_first_data_block) ||
(blk >= fs->super->s_blocks_count)) {
if (preen) {
printf("Illegal block %lu in bad block inode\n", blk);
preenhalt();
}
if (p->fix == -1)
p->fix = ask("Remove illegal block(s) in bad block inode", 1);
printf("Illegal block %lu in bad block inode. %s\n", blk,
clear_msg[p->fix]);
if (p->fix) {
*block_nr = 0;
return BLOCK_CHANGED;
} else {
ext2fs_unmark_valid(fs);
return 0;
}
}
if (blockcnt < 0) {
if (ext2fs_test_block_bitmap(block_found_map, blk))
bad_block_indirect(blk);
else
mark_block_used(fs, blk);
return 0;
}
#if 0
printf ("DEBUG: Marking %lu as bad.\n", blk);
#endif
fs_badblocks_count++;
/*
* If the block is not used, then mark it as used and return.
* If it is already marked as found, this must mean that
* there's an overlap between the filesystem table blocks
* (bitmaps and inode table) and the bad block list.
*/
if (!ext2fs_test_block_bitmap(block_found_map, blk)) {
ext2fs_mark_block_bitmap(block_found_map, blk);
return 0;
}
/*
* Try to find the where the filesystem block was used...
*/
first_block = fs->super->s_first_data_block;
for (i = 0; i < fs->group_desc_count; i++ ) {
if (blk == first_block) {
if (i == 0) {
printf("The primary superblock (%lu) is "
"bad. Aiiieeee....\n", blk);
fatal_error(0);
}
if (!preen)
printf("Warning: Group %d's superblock "
"(%lu) is bad.\n", i, blk);
return 0;
}
if ((blk > first_block) &&
(blk <= first_block + fs->desc_blocks)) {
if (i == 0) {
printf("Bad block %lu is in the primary "
"group descriptors. Aiiieeee....\n",
blk);
fatal_error(0);
}
if (!preen)
printf("Warning: Group %d's copy of the "
"group descriptors has a bad "
"block (%lu).\n", i, blk);
return 0;
}
if (blk == fs->group_desc[i].bg_block_bitmap) {
printf("Group %d's block bitmap (%lu) is bad. ",
i, blk);
if (ask("Relocate", 1)) {
invalid_block_bitmap[i]++;
invalid_bitmaps++;
} else
ext2fs_unmark_valid(fs);
return 0;
}
if (blk == fs->group_desc[i].bg_inode_bitmap) {
printf("Group %d's inode bitmap (%lu) is bad. ",
i, blk);
if (ask("Relocate", 1)) {
invalid_inode_bitmap[i]++;
invalid_bitmaps++;
} else
ext2fs_unmark_valid(fs);
return 0;
}
if ((blk >= fs->group_desc[i].bg_inode_table) &&
(blk < (fs->group_desc[i].bg_inode_table +
fs->inode_blocks_per_group))) {
printf("WARNING: Severe data loss possible!!!!\n");
printf("Bad block %lu in group %d's inode table. ",
blk, i);
if (ask("Relocate", 1)) {
invalid_inode_table[i]++;
invalid_bitmaps++;
} else
ext2fs_unmark_valid(fs);
return 0;
}
first_block += fs->super->s_blocks_per_group;
}
/*
* If we've gotten to this point, then the only
* possibility is that the bad block inode meta data
* is using a bad block.
*/
if ((blk == p->inode->i_block[EXT2_IND_BLOCK]) ||
p->inode->i_block[EXT2_DIND_BLOCK]) {
bad_block_indirect(blk);
return 0;
}
printf("Programming error? block #%lu claimed for no reason "
"in process_bad_block.\n", blk);
return 0;
}
static void new_table_block(ext2_filsys fs, blk_t first_block, int group,
const char *name, int num, blk_t *new_block)
{
errcode_t retval;
blk_t old_block = *new_block;
int i;
char *buf;
retval = ext2fs_get_free_blocks(fs, first_block,
first_block + fs->super->s_blocks_per_group,
num, block_found_map, new_block);
if (retval) {
printf("Could not allocate %d block(s) for %s: %s\n",
num, name, error_message(retval));
ext2fs_unmark_valid(fs);
return;
}
buf = malloc(fs->blocksize);
if (!buf) {
printf("Could not allocate block buffer for relocating %s\n",
name);
ext2fs_unmark_valid(fs);
return;
}
ext2fs_mark_super_dirty(fs);
printf("Relocating group %d's %s ", group, name);
if (old_block)
printf("from %lu ", old_block);
printf("to %lu...\n", *new_block);
for (i = 0; i < num; i++) {
ext2fs_mark_block_bitmap(block_found_map, (*new_block)+i);
if (old_block) {
retval = io_channel_read_blk(fs->io, old_block + i,
1, buf);
if (retval)
printf("Warning: could not read block %lu "
"of %s: %s\n",
old_block + i, name,
error_message(retval));
} else
memset(buf, 0, fs->blocksize);
retval = io_channel_write_blk(fs->io, (*new_block) + i,
1, buf);
if (retval)
printf("Warning: could not write block %lu for %s: %s\n",
(*new_block) + i, name, error_message(retval));
}
free(buf);
}
/*
* This routine gets called at the end of pass 1 if bad blocks are
* detected in the superblock, group descriptors, inode_bitmaps, or
* block bitmaps. At this point, all of the blocks have been mapped
* out, so we can try to allocate new block(s) to replace the bad
* blocks.
*/
static void handle_fs_bad_blocks(ext2_filsys fs)
{
int i;
int first_block = fs->super->s_first_data_block;
for (i = 0; i < fs->group_desc_count; i++) {
if (invalid_block_bitmap[i]) {
new_table_block(fs, first_block, i, "block bitmap", 1,
&fs->group_desc[i].bg_block_bitmap);
}
if (invalid_inode_bitmap[i]) {
new_table_block(fs, first_block, i, "inode bitmap", 1,
&fs->group_desc[i].bg_inode_bitmap);
}
if (invalid_inode_table[i]) {
new_table_block(fs, first_block, i, "inode table",
fs->inode_blocks_per_group,
&fs->group_desc[i].bg_inode_table);
restart_e2fsck++;
}
first_block += fs->super->s_blocks_per_group;
}
invalid_bitmaps = 0;
}
/*
* This routine marks all blocks which are used by the superblock,
* group descriptors, inode bitmaps, and block bitmaps.
*/
static void mark_table_blocks(ext2_filsys fs)
{
blk_t block, b;
int i,j;
block = fs->super->s_first_data_block;
for (i = 0; i < fs->group_desc_count; i++) {
/*
* Mark block used for the block bitmap
*/
if (fs->group_desc[i].bg_block_bitmap) {
if (ext2fs_test_block_bitmap(block_found_map,
fs->group_desc[i].bg_block_bitmap)) {
printf("Group %i's block bitmap at %lu "
"conflicts with some other fs block.\n",
i, fs->group_desc[i].bg_block_bitmap);
preenhalt();
if (ask("Relocate", 1)) {
invalid_block_bitmap[i]++;
invalid_bitmaps++;
} else {
ext2fs_unmark_valid(fs);
}
} else
ext2fs_mark_block_bitmap(block_found_map,
fs->group_desc[i].bg_block_bitmap);
}
/*
* Mark block used for the inode bitmap
*/
if (fs->group_desc[i].bg_inode_bitmap) {
if (ext2fs_test_block_bitmap(block_found_map,
fs->group_desc[i].bg_inode_bitmap)) {
printf("Group %i's inode bitmap at %lu "
"conflicts with some other fs block.\n",
i, fs->group_desc[i].bg_inode_bitmap);
preenhalt();
if (ask("Relocate", 1)) {
invalid_inode_bitmap[i]++;
invalid_bitmaps++;
} else {
ext2fs_unmark_valid(fs);
}
} else
ext2fs_mark_block_bitmap(block_found_map,
fs->group_desc[i].bg_inode_bitmap);
}
/*
* Mark the blocks used for the inode table
*/
if (fs->group_desc[i].bg_inode_table) {
for (j = 0, b = fs->group_desc[i].bg_inode_table;
j < fs->inode_blocks_per_group;
j++, b++) {
if (ext2fs_test_block_bitmap(block_found_map,
b)) {
printf("Group %i's inode table at %lu "
"conflicts with some other "
"fs block.\n",
i, b);
preenhalt();
if (ask("Relocate", 1)) {
invalid_inode_table[i]++;
invalid_bitmaps++;
} else {
ext2fs_unmark_valid(fs);
}
} else
ext2fs_mark_block_bitmap(block_found_map,
b);
}
}
/*
* Mark this group's copy of the superblock
*/
ext2fs_mark_block_bitmap(block_found_map, block);
/*
* Mark this group's copy of the descriptors
*/
for (j = 0; j < fs->desc_blocks; j++)
ext2fs_mark_block_bitmap(block_found_map,
block + j + 1);
block += fs->super->s_blocks_per_group;
}
}
/*
* This subroutines short circuits ext2fs_get_blocks and
* ext2fs_check_directory; we use them since we already have the inode
* structure, so there's no point in letting the ext2fs library read
* the inode again.
*/
static errcode_t pass1_get_blocks(ext2_filsys fs, ino_t ino, blk_t *blocks)
{
int i;
if (ino == stashed_ino) {
for (i=0; i < EXT2_N_BLOCKS; i++)
blocks[i] = stashed_inode->i_block[i];
return 0;
}
printf("INTERNAL ERROR: pass1_get_blocks: unexpected inode #%lu\n",
ino);
printf("\t(was expecting %lu)\n", stashed_ino);
exit(FSCK_ERROR);
}
static errcode_t pass1_check_directory(ext2_filsys fs, ino_t ino)
{
if (ino == stashed_ino) {
if (!S_ISDIR(stashed_inode->i_mode))
return ENOTDIR;
return 0;
}
printf("INTERNAL ERROR: pass1_check_directory: unexpected inode #%lu\n",
ino);
printf("\t(was expecting %lu)\n", stashed_ino);
exit(FSCK_ERROR);
}
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