mirror of https://github.com/vitalif/e2fsprogs
959 lines
28 KiB
C
959 lines
28 KiB
C
/*
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* e2fsck.c - superblock checks
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*
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* Copyright (C) 1993, 1994, 1995, 1996, 1997 Theodore Ts'o.
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*
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* %Begin-Header%
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* This file may be redistributed under the terms of the GNU Public
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* License.
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* %End-Header%
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*/
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#include "config.h"
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#ifdef HAVE_ERRNO_H
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#include <errno.h>
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#endif
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#ifndef EXT2_SKIP_UUID
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#include "uuid/uuid.h"
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#endif
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#include "e2fsck.h"
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#include "problem.h"
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#define MIN_CHECK 1
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#define MAX_CHECK 2
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static void check_super_value(e2fsck_t ctx, const char *descr,
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unsigned long value, int flags,
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unsigned long min_val, unsigned long max_val)
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{
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struct problem_context pctx;
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if (((flags & MIN_CHECK) && (value < min_val)) ||
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((flags & MAX_CHECK) && (value > max_val))) {
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clear_problem_context(&pctx);
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pctx.num = value;
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pctx.str = descr;
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fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx);
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ctx->flags |= E2F_FLAG_ABORT; /* never get here! */
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}
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}
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/*
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* helper function to release an inode
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*/
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struct process_block_struct {
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e2fsck_t ctx;
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char *buf;
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struct problem_context *pctx;
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int truncating;
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int truncate_offset;
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e2_blkcnt_t truncate_block;
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int truncated_blocks;
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int abort;
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errcode_t errcode;
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};
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static int release_inode_block(ext2_filsys fs,
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blk64_t *block_nr,
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e2_blkcnt_t blockcnt,
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blk64_t ref_blk EXT2FS_ATTR((unused)),
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int ref_offset EXT2FS_ATTR((unused)),
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void *priv_data)
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{
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struct process_block_struct *pb;
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e2fsck_t ctx;
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struct problem_context *pctx;
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blk64_t blk = *block_nr;
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int retval = 0;
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pb = (struct process_block_struct *) priv_data;
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ctx = pb->ctx;
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pctx = pb->pctx;
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pctx->blk = blk;
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pctx->blkcount = blockcnt;
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if (HOLE_BLKADDR(blk))
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return 0;
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if ((blk < fs->super->s_first_data_block) ||
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(blk >= ext2fs_blocks_count(fs->super))) {
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fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_BLOCK_NUM, pctx);
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return_abort:
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pb->abort = 1;
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return BLOCK_ABORT;
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}
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if (!ext2fs_test_block_bitmap2(fs->block_map, blk)) {
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fix_problem(ctx, PR_0_ORPHAN_ALREADY_CLEARED_BLOCK, pctx);
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goto return_abort;
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}
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/*
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* If we are deleting an orphan, then we leave the fields alone.
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* If we are truncating an orphan, then update the inode fields
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* and clean up any partial block data.
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*/
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if (pb->truncating) {
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/*
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* We only remove indirect blocks if they are
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* completely empty.
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*/
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if (blockcnt < 0) {
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int i, limit;
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blk_t *bp;
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pb->errcode = io_channel_read_blk64(fs->io, blk, 1,
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pb->buf);
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if (pb->errcode)
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goto return_abort;
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limit = fs->blocksize >> 2;
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for (i = 0, bp = (blk_t *) pb->buf;
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i < limit; i++, bp++)
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if (*bp)
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return 0;
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}
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/*
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* We don't remove direct blocks until we've reached
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* the truncation block.
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*/
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if (blockcnt >= 0 && blockcnt < pb->truncate_block)
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return 0;
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/*
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* If part of the last block needs truncating, we do
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* it here.
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*/
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if ((blockcnt == pb->truncate_block) && pb->truncate_offset) {
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pb->errcode = io_channel_read_blk64(fs->io, blk, 1,
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pb->buf);
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if (pb->errcode)
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goto return_abort;
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memset(pb->buf + pb->truncate_offset, 0,
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fs->blocksize - pb->truncate_offset);
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pb->errcode = io_channel_write_blk64(fs->io, blk, 1,
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pb->buf);
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if (pb->errcode)
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goto return_abort;
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}
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pb->truncated_blocks++;
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*block_nr = 0;
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retval |= BLOCK_CHANGED;
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}
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ext2fs_block_alloc_stats2(fs, blk, -1);
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return retval;
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}
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/*
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* This function releases an inode. Returns 1 if an inconsistency was
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* found. If the inode has a link count, then it is being truncated and
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* not deleted.
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*/
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static int release_inode_blocks(e2fsck_t ctx, ext2_ino_t ino,
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struct ext2_inode *inode, char *block_buf,
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struct problem_context *pctx)
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{
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struct process_block_struct pb;
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ext2_filsys fs = ctx->fs;
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errcode_t retval;
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__u32 count;
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if (!ext2fs_inode_has_valid_blocks2(fs, inode))
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return 0;
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pb.buf = block_buf + 3 * ctx->fs->blocksize;
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pb.ctx = ctx;
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pb.abort = 0;
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pb.errcode = 0;
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pb.pctx = pctx;
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if (inode->i_links_count) {
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pb.truncating = 1;
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pb.truncate_block = (e2_blkcnt_t)
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((EXT2_I_SIZE(inode) + fs->blocksize - 1) /
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fs->blocksize);
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pb.truncate_offset = inode->i_size % fs->blocksize;
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} else {
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pb.truncating = 0;
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pb.truncate_block = 0;
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pb.truncate_offset = 0;
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}
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pb.truncated_blocks = 0;
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retval = ext2fs_block_iterate3(fs, ino, BLOCK_FLAG_DEPTH_TRAVERSE,
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block_buf, release_inode_block, &pb);
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if (retval) {
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com_err("release_inode_blocks", retval,
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_("while calling ext2fs_block_iterate for inode %d"),
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ino);
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return 1;
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}
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if (pb.abort)
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return 1;
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/* Refresh the inode since ext2fs_block_iterate may have changed it */
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e2fsck_read_inode(ctx, ino, inode, "release_inode_blocks");
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if (pb.truncated_blocks)
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ext2fs_iblk_sub_blocks(fs, inode, pb.truncated_blocks);
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if (ext2fs_file_acl_block(fs, inode)) {
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retval = ext2fs_adjust_ea_refcount2(fs,
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ext2fs_file_acl_block(fs, inode),
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block_buf, -1, &count);
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if (retval == EXT2_ET_BAD_EA_BLOCK_NUM) {
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retval = 0;
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count = 1;
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}
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if (retval) {
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com_err("release_inode_blocks", retval,
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_("while calling ext2fs_adjust_ea_refcount2 for inode %d"),
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ino);
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return 1;
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}
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if (count == 0)
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ext2fs_block_alloc_stats2(fs,
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ext2fs_file_acl_block(fs, inode), -1);
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ext2fs_file_acl_block_set(fs, inode, 0);
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}
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return 0;
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}
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/*
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* This function releases all of the orphan inodes. It returns 1 if
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* it hit some error, and 0 on success.
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*/
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static int release_orphan_inodes(e2fsck_t ctx)
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{
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ext2_filsys fs = ctx->fs;
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ext2_ino_t ino, next_ino;
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struct ext2_inode inode;
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struct problem_context pctx;
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char *block_buf;
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if ((ino = fs->super->s_last_orphan) == 0)
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return 0;
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/*
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* Win or lose, we won't be using the head of the orphan inode
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* list again.
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*/
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fs->super->s_last_orphan = 0;
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ext2fs_mark_super_dirty(fs);
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/*
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* If the filesystem contains errors, don't run the orphan
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* list, since the orphan list can't be trusted; and we're
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* going to be running a full e2fsck run anyway...
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*/
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if (fs->super->s_state & EXT2_ERROR_FS)
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return 0;
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if ((ino < EXT2_FIRST_INODE(fs->super)) ||
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(ino > fs->super->s_inodes_count)) {
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clear_problem_context(&pctx);
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pctx.ino = ino;
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fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_HEAD_INODE, &pctx);
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return 1;
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}
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block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 4,
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"block iterate buffer");
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e2fsck_read_bitmaps(ctx);
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while (ino) {
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e2fsck_read_inode(ctx, ino, &inode, "release_orphan_inodes");
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clear_problem_context(&pctx);
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pctx.ino = ino;
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pctx.inode = &inode;
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pctx.str = inode.i_links_count ? _("Truncating") :
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_("Clearing");
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fix_problem(ctx, PR_0_ORPHAN_CLEAR_INODE, &pctx);
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next_ino = inode.i_dtime;
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if (next_ino &&
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((next_ino < EXT2_FIRST_INODE(fs->super)) ||
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(next_ino > fs->super->s_inodes_count))) {
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pctx.ino = next_ino;
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fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_INODE, &pctx);
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goto return_abort;
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}
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if (release_inode_blocks(ctx, ino, &inode, block_buf, &pctx))
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goto return_abort;
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if (!inode.i_links_count) {
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ext2fs_inode_alloc_stats2(fs, ino, -1,
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LINUX_S_ISDIR(inode.i_mode));
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inode.i_dtime = ctx->now;
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} else {
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inode.i_dtime = 0;
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}
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e2fsck_write_inode(ctx, ino, &inode, "delete_file");
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ino = next_ino;
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}
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ext2fs_free_mem(&block_buf);
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return 0;
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return_abort:
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ext2fs_free_mem(&block_buf);
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return 1;
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}
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/*
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* Check the resize inode to make sure it is sane. We check both for
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* the case where on-line resizing is not enabled (in which case the
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* resize inode should be cleared) as well as the case where on-line
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* resizing is enabled.
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*/
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void check_resize_inode(e2fsck_t ctx)
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{
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ext2_filsys fs = ctx->fs;
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struct ext2_inode inode;
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struct problem_context pctx;
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int i, gdt_off, ind_off;
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dgrp_t j;
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blk64_t blk, pblk, expect;
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__u32 *dind_buf = 0, *ind_buf;
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errcode_t retval;
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clear_problem_context(&pctx);
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/*
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* If the resize inode feature isn't set, then
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* s_reserved_gdt_blocks must be zero.
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*/
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if (!(fs->super->s_feature_compat &
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EXT2_FEATURE_COMPAT_RESIZE_INODE)) {
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if (fs->super->s_reserved_gdt_blocks) {
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pctx.num = fs->super->s_reserved_gdt_blocks;
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if (fix_problem(ctx, PR_0_NONZERO_RESERVED_GDT_BLOCKS,
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&pctx)) {
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fs->super->s_reserved_gdt_blocks = 0;
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ext2fs_mark_super_dirty(fs);
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}
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}
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}
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/* Read the resize inode */
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pctx.ino = EXT2_RESIZE_INO;
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retval = ext2fs_read_inode(fs, EXT2_RESIZE_INO, &inode);
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if (retval) {
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if (fs->super->s_feature_compat &
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EXT2_FEATURE_COMPAT_RESIZE_INODE)
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ctx->flags |= E2F_FLAG_RESIZE_INODE;
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return;
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}
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/*
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* If the resize inode feature isn't set, check to make sure
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* the resize inode is cleared; then we're done.
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*/
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if (!(fs->super->s_feature_compat &
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EXT2_FEATURE_COMPAT_RESIZE_INODE)) {
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for (i=0; i < EXT2_N_BLOCKS; i++) {
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if (inode.i_block[i])
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break;
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}
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if ((i < EXT2_N_BLOCKS) &&
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fix_problem(ctx, PR_0_CLEAR_RESIZE_INODE, &pctx)) {
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memset(&inode, 0, sizeof(inode));
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e2fsck_write_inode(ctx, EXT2_RESIZE_INO, &inode,
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"clear_resize");
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}
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return;
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}
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/*
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* The resize inode feature is enabled; check to make sure the
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* only block in use is the double indirect block
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*/
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blk = inode.i_block[EXT2_DIND_BLOCK];
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for (i=0; i < EXT2_N_BLOCKS; i++) {
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if (i != EXT2_DIND_BLOCK && inode.i_block[i])
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break;
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}
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if ((i < EXT2_N_BLOCKS) || !blk || !inode.i_links_count ||
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!(inode.i_mode & LINUX_S_IFREG) ||
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(blk < fs->super->s_first_data_block ||
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blk >= ext2fs_blocks_count(fs->super))) {
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resize_inode_invalid:
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if (fix_problem(ctx, PR_0_RESIZE_INODE_INVALID, &pctx)) {
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memset(&inode, 0, sizeof(inode));
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e2fsck_write_inode(ctx, EXT2_RESIZE_INO, &inode,
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"clear_resize");
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ctx->flags |= E2F_FLAG_RESIZE_INODE;
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}
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if (!(ctx->options & E2F_OPT_READONLY)) {
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fs->super->s_state &= ~EXT2_VALID_FS;
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ext2fs_mark_super_dirty(fs);
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}
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goto cleanup;
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}
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dind_buf = (__u32 *) e2fsck_allocate_memory(ctx, fs->blocksize * 2,
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"resize dind buffer");
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ind_buf = (__u32 *) ((char *) dind_buf + fs->blocksize);
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retval = ext2fs_read_ind_block(fs, blk, dind_buf);
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if (retval)
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goto resize_inode_invalid;
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gdt_off = fs->desc_blocks;
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pblk = fs->super->s_first_data_block + 1 + fs->desc_blocks;
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if (fs->blocksize == 1024 && fs->super->s_first_data_block == 0)
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pblk++; /* Deal with 1024 blocksize bigalloc fs */
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for (i = 0; i < fs->super->s_reserved_gdt_blocks / 4;
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i++, gdt_off++, pblk++) {
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gdt_off %= fs->blocksize/4;
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if (dind_buf[gdt_off] != pblk)
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goto resize_inode_invalid;
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retval = ext2fs_read_ind_block(fs, pblk, ind_buf);
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if (retval)
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goto resize_inode_invalid;
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ind_off = 0;
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for (j = 1; j < fs->group_desc_count; j++) {
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if (!ext2fs_bg_has_super(fs, j))
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continue;
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expect = pblk + (j * fs->super->s_blocks_per_group);
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if (ind_buf[ind_off] != expect)
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goto resize_inode_invalid;
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ind_off++;
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}
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}
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cleanup:
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if (dind_buf)
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ext2fs_free_mem(&dind_buf);
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}
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/*
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* This function checks the dirhash signed/unsigned hint if necessary.
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*/
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static void e2fsck_fix_dirhash_hint(e2fsck_t ctx)
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{
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struct ext2_super_block *sb = ctx->fs->super;
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struct problem_context pctx;
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char c;
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if ((ctx->options & E2F_OPT_READONLY) ||
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!(sb->s_feature_compat & EXT2_FEATURE_COMPAT_DIR_INDEX) ||
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(sb->s_flags & (EXT2_FLAGS_SIGNED_HASH|EXT2_FLAGS_UNSIGNED_HASH)))
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return;
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c = (char) 255;
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clear_problem_context(&pctx);
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if (fix_problem(ctx, PR_0_DIRHASH_HINT, &pctx)) {
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if (((int) c) == -1) {
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sb->s_flags |= EXT2_FLAGS_SIGNED_HASH;
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} else {
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sb->s_flags |= EXT2_FLAGS_UNSIGNED_HASH;
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}
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ext2fs_mark_super_dirty(ctx->fs);
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}
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}
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void check_super_block(e2fsck_t ctx)
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{
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ext2_filsys fs = ctx->fs;
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blk64_t first_block, last_block;
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struct ext2_super_block *sb = fs->super;
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problem_t problem;
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blk64_t blocks_per_group = fs->super->s_blocks_per_group;
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__u32 bpg_max, cpg_max;
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int inodes_per_block;
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int ipg_max;
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int inode_size;
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int accept_time_fudge;
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int broken_system_clock;
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dgrp_t i;
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blk64_t should_be;
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struct problem_context pctx;
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blk64_t free_blocks = 0;
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ino_t free_inodes = 0;
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int csum_flag, clear_test_fs_flag;
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inodes_per_block = EXT2_INODES_PER_BLOCK(fs->super);
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ipg_max = inodes_per_block * (blocks_per_group - 4);
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if (ipg_max > EXT2_MAX_INODES_PER_GROUP(sb))
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ipg_max = EXT2_MAX_INODES_PER_GROUP(sb);
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cpg_max = 8 * EXT2_BLOCK_SIZE(sb);
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if (cpg_max > EXT2_MAX_CLUSTERS_PER_GROUP(sb))
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cpg_max = EXT2_MAX_CLUSTERS_PER_GROUP(sb);
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bpg_max = 8 * EXT2_BLOCK_SIZE(sb) * EXT2FS_CLUSTER_RATIO(fs);
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if (bpg_max > EXT2_MAX_BLOCKS_PER_GROUP(sb))
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bpg_max = EXT2_MAX_BLOCKS_PER_GROUP(sb);
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|
|
ctx->invalid_inode_bitmap_flag = (int *) e2fsck_allocate_memory(ctx,
|
|
sizeof(int) * fs->group_desc_count, "invalid_inode_bitmap");
|
|
ctx->invalid_block_bitmap_flag = (int *) e2fsck_allocate_memory(ctx,
|
|
sizeof(int) * fs->group_desc_count, "invalid_block_bitmap");
|
|
ctx->invalid_inode_table_flag = (int *) e2fsck_allocate_memory(ctx,
|
|
sizeof(int) * fs->group_desc_count, "invalid_inode_table");
|
|
|
|
clear_problem_context(&pctx);
|
|
|
|
/*
|
|
* Verify the super block constants...
|
|
*/
|
|
check_super_value(ctx, "inodes_count", sb->s_inodes_count,
|
|
MIN_CHECK, 1, 0);
|
|
check_super_value(ctx, "blocks_count", ext2fs_blocks_count(sb),
|
|
MIN_CHECK, 1, 0);
|
|
check_super_value(ctx, "first_data_block", sb->s_first_data_block,
|
|
MAX_CHECK, 0, ext2fs_blocks_count(sb));
|
|
check_super_value(ctx, "log_block_size", sb->s_log_block_size,
|
|
MIN_CHECK | MAX_CHECK, 0,
|
|
EXT2_MAX_BLOCK_LOG_SIZE - EXT2_MIN_BLOCK_LOG_SIZE);
|
|
check_super_value(ctx, "log_cluster_size",
|
|
sb->s_log_cluster_size,
|
|
MIN_CHECK | MAX_CHECK, sb->s_log_block_size,
|
|
(EXT2_MAX_CLUSTER_LOG_SIZE -
|
|
EXT2_MIN_CLUSTER_LOG_SIZE));
|
|
check_super_value(ctx, "clusters_per_group", sb->s_clusters_per_group,
|
|
MIN_CHECK | MAX_CHECK, 8, cpg_max);
|
|
check_super_value(ctx, "blocks_per_group", sb->s_blocks_per_group,
|
|
MIN_CHECK | MAX_CHECK, 8, bpg_max);
|
|
check_super_value(ctx, "inodes_per_group", sb->s_inodes_per_group,
|
|
MIN_CHECK | MAX_CHECK, inodes_per_block, ipg_max);
|
|
check_super_value(ctx, "r_blocks_count", ext2fs_r_blocks_count(sb),
|
|
MAX_CHECK, 0, ext2fs_blocks_count(sb) / 2);
|
|
check_super_value(ctx, "reserved_gdt_blocks",
|
|
sb->s_reserved_gdt_blocks, MAX_CHECK, 0,
|
|
fs->blocksize/4);
|
|
if (sb->s_rev_level > EXT2_GOOD_OLD_REV)
|
|
check_super_value(ctx, "first_ino", sb->s_first_ino,
|
|
MIN_CHECK | MAX_CHECK,
|
|
EXT2_GOOD_OLD_FIRST_INO, sb->s_inodes_count);
|
|
inode_size = EXT2_INODE_SIZE(sb);
|
|
check_super_value(ctx, "inode_size",
|
|
inode_size, MIN_CHECK | MAX_CHECK,
|
|
EXT2_GOOD_OLD_INODE_SIZE, fs->blocksize);
|
|
if (sb->s_blocks_per_group != (sb->s_clusters_per_group *
|
|
EXT2FS_CLUSTER_RATIO(fs))) {
|
|
pctx.num = sb->s_clusters_per_group * EXT2FS_CLUSTER_RATIO(fs);
|
|
pctx.str = "block_size";
|
|
fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx);
|
|
ctx->flags |= E2F_FLAG_ABORT; /* never get here! */
|
|
return;
|
|
}
|
|
if (inode_size & (inode_size - 1)) {
|
|
pctx.num = inode_size;
|
|
pctx.str = "inode_size";
|
|
fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx);
|
|
ctx->flags |= E2F_FLAG_ABORT; /* never get here! */
|
|
return;
|
|
}
|
|
|
|
if ((ctx->flags & E2F_FLAG_GOT_DEVSIZE) &&
|
|
(ctx->num_blocks < ext2fs_blocks_count(sb))) {
|
|
pctx.blk = ext2fs_blocks_count(sb);
|
|
pctx.blk2 = ctx->num_blocks;
|
|
if (fix_problem(ctx, PR_0_FS_SIZE_WRONG, &pctx)) {
|
|
ctx->flags |= E2F_FLAG_ABORT;
|
|
return;
|
|
}
|
|
}
|
|
|
|
should_be = (sb->s_log_block_size == 0 &&
|
|
EXT2FS_CLUSTER_RATIO(fs) == 1) ? 1 : 0;
|
|
if (sb->s_first_data_block != should_be) {
|
|
pctx.blk = sb->s_first_data_block;
|
|
pctx.blk2 = should_be;
|
|
fix_problem(ctx, PR_0_FIRST_DATA_BLOCK, &pctx);
|
|
ctx->flags |= E2F_FLAG_ABORT;
|
|
return;
|
|
}
|
|
|
|
should_be = sb->s_inodes_per_group * fs->group_desc_count;
|
|
if (sb->s_inodes_count != should_be) {
|
|
pctx.ino = sb->s_inodes_count;
|
|
pctx.ino2 = should_be;
|
|
if (fix_problem(ctx, PR_0_INODE_COUNT_WRONG, &pctx)) {
|
|
sb->s_inodes_count = should_be;
|
|
ext2fs_mark_super_dirty(fs);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Verify the group descriptors....
|
|
*/
|
|
first_block = sb->s_first_data_block;
|
|
last_block = ext2fs_blocks_count(sb)-1;
|
|
|
|
csum_flag = EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
|
|
EXT4_FEATURE_RO_COMPAT_GDT_CSUM);
|
|
for (i = 0; i < fs->group_desc_count; i++) {
|
|
pctx.group = i;
|
|
|
|
if (!EXT2_HAS_INCOMPAT_FEATURE(fs->super,
|
|
EXT4_FEATURE_INCOMPAT_FLEX_BG)) {
|
|
first_block = ext2fs_group_first_block2(fs, i);
|
|
last_block = ext2fs_group_last_block2(fs, i);
|
|
}
|
|
|
|
if ((ext2fs_block_bitmap_loc(fs, i) < first_block) ||
|
|
(ext2fs_block_bitmap_loc(fs, i) > last_block)) {
|
|
pctx.blk = ext2fs_block_bitmap_loc(fs, i);
|
|
if (fix_problem(ctx, PR_0_BB_NOT_GROUP, &pctx))
|
|
ext2fs_block_bitmap_loc_set(fs, i, 0);
|
|
}
|
|
if (ext2fs_block_bitmap_loc(fs, i) == 0) {
|
|
ctx->invalid_block_bitmap_flag[i]++;
|
|
ctx->invalid_bitmaps++;
|
|
}
|
|
if ((ext2fs_inode_bitmap_loc(fs, i) < first_block) ||
|
|
(ext2fs_inode_bitmap_loc(fs, i) > last_block)) {
|
|
pctx.blk = ext2fs_inode_bitmap_loc(fs, i);
|
|
if (fix_problem(ctx, PR_0_IB_NOT_GROUP, &pctx))
|
|
ext2fs_inode_bitmap_loc_set(fs, i, 0);
|
|
}
|
|
if (ext2fs_inode_bitmap_loc(fs, i) == 0) {
|
|
ctx->invalid_inode_bitmap_flag[i]++;
|
|
ctx->invalid_bitmaps++;
|
|
}
|
|
if ((ext2fs_inode_table_loc(fs, i) < first_block) ||
|
|
((ext2fs_inode_table_loc(fs, i) +
|
|
fs->inode_blocks_per_group - 1) > last_block)) {
|
|
pctx.blk = ext2fs_inode_table_loc(fs, i);
|
|
if (fix_problem(ctx, PR_0_ITABLE_NOT_GROUP, &pctx))
|
|
ext2fs_inode_table_loc_set(fs, i, 0);
|
|
}
|
|
if (ext2fs_inode_table_loc(fs, i) == 0) {
|
|
ctx->invalid_inode_table_flag[i]++;
|
|
ctx->invalid_bitmaps++;
|
|
}
|
|
free_blocks += ext2fs_bg_free_blocks_count(fs, i);
|
|
free_inodes += ext2fs_bg_free_inodes_count(fs, i);
|
|
|
|
if ((ext2fs_bg_free_blocks_count(fs, i) > sb->s_blocks_per_group) ||
|
|
(ext2fs_bg_free_inodes_count(fs, i) > sb->s_inodes_per_group) ||
|
|
(ext2fs_bg_used_dirs_count(fs, i) > sb->s_inodes_per_group))
|
|
ext2fs_unmark_valid(fs);
|
|
|
|
should_be = 0;
|
|
if (!ext2fs_group_desc_csum_verify(fs, i)) {
|
|
if (fix_problem(ctx, PR_0_GDT_CSUM, &pctx)) {
|
|
ext2fs_bg_flags_clear(fs, i, EXT2_BG_BLOCK_UNINIT);
|
|
ext2fs_bg_flags_clear(fs, i, EXT2_BG_INODE_UNINIT);
|
|
ext2fs_bg_itable_unused_set(fs, i, 0);
|
|
should_be = 1;
|
|
}
|
|
ext2fs_unmark_valid(fs);
|
|
}
|
|
|
|
if (!csum_flag &&
|
|
(ext2fs_bg_flags_test(fs, i, EXT2_BG_BLOCK_UNINIT) ||
|
|
ext2fs_bg_flags_test(fs, i, EXT2_BG_INODE_UNINIT) ||
|
|
ext2fs_bg_itable_unused(fs, i) != 0)) {
|
|
if (fix_problem(ctx, PR_0_GDT_UNINIT, &pctx)) {
|
|
ext2fs_bg_flags_clear(fs, i, EXT2_BG_BLOCK_UNINIT);
|
|
ext2fs_bg_flags_clear(fs, i, EXT2_BG_INODE_UNINIT);
|
|
ext2fs_bg_itable_unused_set(fs, i, 0);
|
|
should_be = 1;
|
|
}
|
|
ext2fs_unmark_valid(fs);
|
|
}
|
|
|
|
if (i == fs->group_desc_count - 1 &&
|
|
ext2fs_bg_flags_test(fs, i, EXT2_BG_BLOCK_UNINIT)) {
|
|
if (fix_problem(ctx, PR_0_BB_UNINIT_LAST, &pctx)) {
|
|
ext2fs_bg_flags_clear(fs, i, EXT2_BG_BLOCK_UNINIT);
|
|
should_be = 1;
|
|
}
|
|
ext2fs_unmark_valid(fs);
|
|
}
|
|
|
|
if (ext2fs_bg_flags_test(fs, i, EXT2_BG_BLOCK_UNINIT) &&
|
|
!ext2fs_bg_flags_test(fs, i, EXT2_BG_INODE_UNINIT)) {
|
|
if (fix_problem(ctx, PR_0_BB_UNINIT_IB_INIT, &pctx)) {
|
|
ext2fs_bg_flags_clear(fs, i, EXT2_BG_BLOCK_UNINIT);
|
|
should_be = 1;
|
|
}
|
|
ext2fs_unmark_valid(fs);
|
|
}
|
|
|
|
if (csum_flag &&
|
|
(ext2fs_bg_itable_unused(fs, i) > ext2fs_bg_free_inodes_count(fs, i) ||
|
|
ext2fs_bg_itable_unused(fs, i) > sb->s_inodes_per_group)) {
|
|
pctx.blk = ext2fs_bg_itable_unused(fs, i);
|
|
if (fix_problem(ctx, PR_0_GDT_ITABLE_UNUSED, &pctx)) {
|
|
ext2fs_bg_itable_unused_set(fs, i, 0);
|
|
should_be = 1;
|
|
}
|
|
ext2fs_unmark_valid(fs);
|
|
}
|
|
|
|
if (should_be)
|
|
ext2fs_group_desc_csum_set(fs, i);
|
|
/* If the user aborts e2fsck by typing ^C, stop right away */
|
|
if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
|
|
return;
|
|
}
|
|
|
|
ctx->free_blocks = EXT2FS_C2B(fs, free_blocks);
|
|
ctx->free_inodes = free_inodes;
|
|
|
|
if ((ext2fs_free_blocks_count(sb) > ext2fs_blocks_count(sb)) ||
|
|
(sb->s_free_inodes_count > sb->s_inodes_count))
|
|
ext2fs_unmark_valid(fs);
|
|
|
|
|
|
/*
|
|
* If we have invalid bitmaps, set the error state of the
|
|
* filesystem.
|
|
*/
|
|
if (ctx->invalid_bitmaps && !(ctx->options & E2F_OPT_READONLY)) {
|
|
sb->s_state &= ~EXT2_VALID_FS;
|
|
ext2fs_mark_super_dirty(fs);
|
|
}
|
|
|
|
clear_problem_context(&pctx);
|
|
|
|
#ifndef EXT2_SKIP_UUID
|
|
/*
|
|
* If the UUID field isn't assigned, assign it.
|
|
*/
|
|
if (!(ctx->options & E2F_OPT_READONLY) && uuid_is_null(sb->s_uuid)) {
|
|
if (fix_problem(ctx, PR_0_ADD_UUID, &pctx)) {
|
|
uuid_generate(sb->s_uuid);
|
|
fs->flags |= EXT2_FLAG_DIRTY;
|
|
fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Check to see if we should disable the test_fs flag
|
|
*/
|
|
profile_get_boolean(ctx->profile, "options",
|
|
"clear_test_fs_flag", 0, 1,
|
|
&clear_test_fs_flag);
|
|
if (!(ctx->options & E2F_OPT_READONLY) &&
|
|
clear_test_fs_flag &&
|
|
(fs->super->s_flags & EXT2_FLAGS_TEST_FILESYS) &&
|
|
(fs_proc_check("ext4") || check_for_modules("ext4"))) {
|
|
if (fix_problem(ctx, PR_0_CLEAR_TESTFS_FLAG, &pctx)) {
|
|
fs->super->s_flags &= ~EXT2_FLAGS_TEST_FILESYS;
|
|
fs->flags |= EXT2_FLAG_DIRTY;
|
|
fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* For the Hurd, check to see if the filetype option is set,
|
|
* since it doesn't support it.
|
|
*/
|
|
if (!(ctx->options & E2F_OPT_READONLY) &&
|
|
fs->super->s_creator_os == EXT2_OS_HURD &&
|
|
(fs->super->s_feature_incompat &
|
|
EXT2_FEATURE_INCOMPAT_FILETYPE)) {
|
|
if (fix_problem(ctx, PR_0_HURD_CLEAR_FILETYPE, &pctx)) {
|
|
fs->super->s_feature_incompat &=
|
|
~EXT2_FEATURE_INCOMPAT_FILETYPE;
|
|
ext2fs_mark_super_dirty(fs);
|
|
fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If we have any of the compatibility flags set, we need to have a
|
|
* revision 1 filesystem. Most kernels will not check the flags on
|
|
* a rev 0 filesystem and we may have corruption issues because of
|
|
* the incompatible changes to the filesystem.
|
|
*/
|
|
if (!(ctx->options & E2F_OPT_READONLY) &&
|
|
fs->super->s_rev_level == EXT2_GOOD_OLD_REV &&
|
|
(fs->super->s_feature_compat ||
|
|
fs->super->s_feature_ro_compat ||
|
|
fs->super->s_feature_incompat) &&
|
|
fix_problem(ctx, PR_0_FS_REV_LEVEL, &pctx)) {
|
|
ext2fs_update_dynamic_rev(fs);
|
|
ext2fs_mark_super_dirty(fs);
|
|
fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
|
|
}
|
|
|
|
/*
|
|
* Clean up any orphan inodes, if present.
|
|
*/
|
|
if (!(ctx->options & E2F_OPT_READONLY) && release_orphan_inodes(ctx)) {
|
|
fs->super->s_state &= ~EXT2_VALID_FS;
|
|
ext2fs_mark_super_dirty(fs);
|
|
}
|
|
|
|
/*
|
|
* Unfortunately, due to Windows' unfortunate design decision
|
|
* to configure the hardware clock to tick localtime, instead
|
|
* of the more proper and less error-prone UTC time, many
|
|
* users end up in the situation where the system clock is
|
|
* incorrectly set at the time when e2fsck is run.
|
|
*
|
|
* Historically this was usually due to some distributions
|
|
* having buggy init scripts and/or installers that didn't
|
|
* correctly detect this case and take appropriate
|
|
* countermeasures. However, it's still possible, despite the
|
|
* best efforts of init script and installer authors to not be
|
|
* able to detect this misconfiguration, usually due to a
|
|
* buggy or misconfigured virtualization manager or the
|
|
* installer not having access to a network time server during
|
|
* the installation process. So by default, we allow the
|
|
* superblock times to be fudged by up to 24 hours. This can
|
|
* be disabled by setting options.accept_time_fudge to the
|
|
* boolean value of false in e2fsck.conf. We also support
|
|
* options.buggy_init_scripts for backwards compatibility.
|
|
*/
|
|
profile_get_boolean(ctx->profile, "options", "accept_time_fudge",
|
|
0, 1, &accept_time_fudge);
|
|
profile_get_boolean(ctx->profile, "options", "buggy_init_scripts",
|
|
0, accept_time_fudge, &accept_time_fudge);
|
|
ctx->time_fudge = accept_time_fudge ? 86400 : 0;
|
|
|
|
profile_get_boolean(ctx->profile, "options", "broken_system_clock",
|
|
0, 0, &broken_system_clock);
|
|
|
|
/*
|
|
* Check to see if the superblock last mount time or last
|
|
* write time is in the future.
|
|
*/
|
|
if (!broken_system_clock &&
|
|
!(ctx->flags & E2F_FLAG_TIME_INSANE) &&
|
|
fs->super->s_mtime > (__u32) ctx->now) {
|
|
pctx.num = fs->super->s_mtime;
|
|
problem = PR_0_FUTURE_SB_LAST_MOUNT;
|
|
if (fs->super->s_mtime <= (__u32) ctx->now + ctx->time_fudge)
|
|
problem = PR_0_FUTURE_SB_LAST_MOUNT_FUDGED;
|
|
if (fix_problem(ctx, problem, &pctx)) {
|
|
fs->super->s_mtime = ctx->now;
|
|
fs->flags |= EXT2_FLAG_DIRTY;
|
|
}
|
|
}
|
|
if (!broken_system_clock &&
|
|
!(ctx->flags & E2F_FLAG_TIME_INSANE) &&
|
|
fs->super->s_wtime > (__u32) ctx->now) {
|
|
pctx.num = fs->super->s_wtime;
|
|
problem = PR_0_FUTURE_SB_LAST_WRITE;
|
|
if (fs->super->s_wtime <= (__u32) ctx->now + ctx->time_fudge)
|
|
problem = PR_0_FUTURE_SB_LAST_WRITE_FUDGED;
|
|
if (fix_problem(ctx, problem, &pctx)) {
|
|
fs->super->s_wtime = ctx->now;
|
|
fs->flags |= EXT2_FLAG_DIRTY;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Move the ext3 journal file, if necessary.
|
|
*/
|
|
e2fsck_move_ext3_journal(ctx);
|
|
|
|
/*
|
|
* Fix journal hint, if necessary
|
|
*/
|
|
e2fsck_fix_ext3_journal_hint(ctx);
|
|
|
|
/*
|
|
* Add dirhash hint if necessary
|
|
*/
|
|
e2fsck_fix_dirhash_hint(ctx);
|
|
|
|
/*
|
|
* Hide quota inodes if necessary.
|
|
*/
|
|
e2fsck_hide_quota(ctx);
|
|
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Check to see if we should backup the master sb to the backup super
|
|
* blocks. Returns non-zero if the sb should be backed up.
|
|
*/
|
|
|
|
/*
|
|
* A few flags are set on the fly by the kernel, but only in the
|
|
* primary superblock. This is actually a bad thing, and we should
|
|
* try to discourage it in the future. In particular, for the newer
|
|
* ext4 files, especially EXT4_FEATURE_RO_COMPAT_DIR_NLINK and
|
|
* EXT3_FEATURE_INCOMPAT_EXTENTS. So some of these may go away in the
|
|
* future. EXT3_FEATURE_INCOMPAT_RECOVER may also get set when
|
|
* copying the primary superblock during online resize.
|
|
*
|
|
* The kernel will set EXT2_FEATURE_COMPAT_EXT_ATTR, but
|
|
* unfortunately, we shouldn't ignore it since if it's not set in the
|
|
* backup, the extended attributes in the filesystem will be stripped
|
|
* away.
|
|
*/
|
|
#define FEATURE_RO_COMPAT_IGNORE (EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
|
|
EXT4_FEATURE_RO_COMPAT_DIR_NLINK)
|
|
#define FEATURE_INCOMPAT_IGNORE (EXT3_FEATURE_INCOMPAT_EXTENTS| \
|
|
EXT3_FEATURE_INCOMPAT_RECOVER)
|
|
|
|
int check_backup_super_block(e2fsck_t ctx)
|
|
{
|
|
ext2_filsys fs = ctx->fs;
|
|
errcode_t retval;
|
|
dgrp_t g;
|
|
blk64_t sb;
|
|
int ret = 0;
|
|
char buf[SUPERBLOCK_SIZE];
|
|
struct ext2_super_block *backup_sb;
|
|
|
|
/*
|
|
* If we are already writing out the backup blocks, then we
|
|
* don't need to test. Also, if the filesystem is invalid, or
|
|
* the check was aborted or cancelled, we also don't want to
|
|
* do the backup. If the filesystem was opened read-only then
|
|
* we can't do the backup.
|
|
*/
|
|
if (((fs->flags & EXT2_FLAG_MASTER_SB_ONLY) == 0) ||
|
|
!ext2fs_test_valid(fs) ||
|
|
(fs->super->s_state & EXT2_ERROR_FS) ||
|
|
(ctx->flags & (E2F_FLAG_ABORT | E2F_FLAG_CANCEL)) ||
|
|
(ctx->options & E2F_OPT_READONLY))
|
|
return 0;
|
|
|
|
for (g = 1; g < fs->group_desc_count; g++) {
|
|
if (!ext2fs_bg_has_super(fs, g))
|
|
continue;
|
|
|
|
sb = fs->super->s_first_data_block +
|
|
(g * fs->super->s_blocks_per_group);
|
|
|
|
retval = io_channel_read_blk(fs->io, sb, -SUPERBLOCK_SIZE,
|
|
buf);
|
|
if (retval)
|
|
continue;
|
|
backup_sb = (struct ext2_super_block *) buf;
|
|
#ifdef WORDS_BIGENDIAN
|
|
ext2fs_swap_super(backup_sb);
|
|
#endif
|
|
if ((backup_sb->s_magic != EXT2_SUPER_MAGIC) ||
|
|
(backup_sb->s_rev_level > EXT2_LIB_CURRENT_REV) ||
|
|
((backup_sb->s_log_block_size + EXT2_MIN_BLOCK_LOG_SIZE) >
|
|
EXT2_MAX_BLOCK_LOG_SIZE) ||
|
|
(EXT2_INODE_SIZE(backup_sb) < EXT2_GOOD_OLD_INODE_SIZE))
|
|
continue;
|
|
|
|
#define SUPER_INCOMPAT_DIFFERENT(x) \
|
|
((fs->super->x & ~FEATURE_INCOMPAT_IGNORE) != \
|
|
(backup_sb->x & ~FEATURE_INCOMPAT_IGNORE))
|
|
#define SUPER_RO_COMPAT_DIFFERENT(x) \
|
|
((fs->super->x & ~FEATURE_RO_COMPAT_IGNORE) != \
|
|
(backup_sb->x & ~FEATURE_RO_COMPAT_IGNORE))
|
|
#define SUPER_DIFFERENT(x) \
|
|
(fs->super->x != backup_sb->x)
|
|
|
|
if (SUPER_DIFFERENT(s_feature_compat) ||
|
|
SUPER_INCOMPAT_DIFFERENT(s_feature_incompat) ||
|
|
SUPER_RO_COMPAT_DIFFERENT(s_feature_ro_compat) ||
|
|
SUPER_DIFFERENT(s_blocks_count) ||
|
|
SUPER_DIFFERENT(s_inodes_count) ||
|
|
memcmp(fs->super->s_uuid, backup_sb->s_uuid,
|
|
sizeof(fs->super->s_uuid)))
|
|
ret = 1;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|