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-rw-r--r--e2fsck/super.c1461
1 files changed, 1461 insertions, 0 deletions
diff --git a/e2fsck/super.c b/e2fsck/super.c
new file mode 100644
index 0000000..9495e02
--- /dev/null
+++ b/e2fsck/super.c
@@ -0,0 +1,1461 @@
+/*
+ * e2fsck.c - superblock checks
+ *
+ * Copyright (C) 1993, 1994, 1995, 1996, 1997 Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Public
+ * License.
+ * %End-Header%
+ */
+
+#include "config.h"
+#ifdef HAVE_ERRNO_H
+#include <errno.h>
+#endif
+
+#ifndef EXT2_SKIP_UUID
+#include "uuid/uuid.h"
+#endif
+#include "e2fsck.h"
+#include "problem.h"
+
+#define MIN_CHECK 1
+#define MAX_CHECK 2
+#define LOG2_CHECK 4
+
+static int check_super_value(e2fsck_t ctx, const char *descr,
+ unsigned long value, int flags,
+ unsigned long min_val, unsigned long max_val)
+{
+ struct problem_context pctx;
+
+ if ((flags & MIN_CHECK && value < min_val) ||
+ (flags & MAX_CHECK && value > max_val) ||
+ (flags & LOG2_CHECK && (value & (value - 1)) != 0)) {
+ clear_problem_context(&pctx);
+ pctx.num = value;
+ pctx.str = descr;
+ fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx);
+ ctx->flags |= E2F_FLAG_ABORT;
+ return 0;
+ }
+ return 1;
+}
+
+static int check_super_value64(e2fsck_t ctx, const char *descr,
+ __u64 value, int flags,
+ __u64 min_val, __u64 max_val)
+{
+ struct problem_context pctx;
+
+ if ((flags & MIN_CHECK && value < min_val) ||
+ (flags & MAX_CHECK && value > max_val) ||
+ (flags & LOG2_CHECK && (value & (value - 1)) != 0)) {
+ clear_problem_context(&pctx);
+ pctx.num = value;
+ pctx.str = descr;
+ fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx);
+ ctx->flags |= E2F_FLAG_ABORT;
+ return 0;
+ }
+ return 1;
+}
+
+/*
+ * helper function to release an inode
+ */
+struct process_block_struct {
+ e2fsck_t ctx;
+ char *buf;
+ struct problem_context *pctx;
+ int truncating;
+ int truncate_offset;
+ e2_blkcnt_t truncate_block;
+ int truncated_blocks;
+ int abort;
+ errcode_t errcode;
+ blk64_t last_cluster;
+ struct ext2_inode_large *inode;
+};
+
+static int release_inode_block(ext2_filsys fs,
+ blk64_t *block_nr,
+ e2_blkcnt_t blockcnt,
+ blk64_t ref_blk EXT2FS_ATTR((unused)),
+ int ref_offset EXT2FS_ATTR((unused)),
+ void *priv_data)
+{
+ struct process_block_struct *pb;
+ e2fsck_t ctx;
+ struct problem_context *pctx;
+ blk64_t blk = *block_nr;
+ blk64_t cluster = EXT2FS_B2C(fs, *block_nr);
+ int retval = 0;
+
+ pb = (struct process_block_struct *) priv_data;
+ ctx = pb->ctx;
+ pctx = pb->pctx;
+
+ pctx->blk = blk;
+ pctx->blkcount = blockcnt;
+
+ if (blk == 0)
+ return 0;
+
+ if (pb->last_cluster == cluster)
+ return 0;
+
+ pb->last_cluster = cluster;
+
+ if ((blk < fs->super->s_first_data_block) ||
+ (blk >= ext2fs_blocks_count(fs->super))) {
+ fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_BLOCK_NUM, pctx);
+ return_abort:
+ pb->abort = 1;
+ return BLOCK_ABORT;
+ }
+
+ if (!ext2fs_test_block_bitmap2(fs->block_map, blk)) {
+ fix_problem(ctx, PR_0_ORPHAN_ALREADY_CLEARED_BLOCK, pctx);
+ goto return_abort;
+ }
+
+ /*
+ * If we are deleting an orphan, then we leave the fields alone.
+ * If we are truncating an orphan, then update the inode fields
+ * and clean up any partial block data.
+ */
+ if (pb->truncating) {
+ /*
+ * We only remove indirect blocks if they are
+ * completely empty.
+ */
+ if (blockcnt < 0) {
+ int i, limit;
+ blk_t *bp;
+
+ pb->errcode = io_channel_read_blk64(fs->io, blk, 1,
+ pb->buf);
+ if (pb->errcode)
+ goto return_abort;
+
+ limit = fs->blocksize >> 2;
+ for (i = 0, bp = (blk_t *) pb->buf;
+ i < limit; i++, bp++)
+ if (*bp)
+ return 0;
+ }
+ /*
+ * We don't remove direct blocks until we've reached
+ * the truncation block.
+ */
+ if (blockcnt >= 0 && blockcnt < pb->truncate_block)
+ return 0;
+ /*
+ * If part of the last block needs truncating, we do
+ * it here.
+ */
+ if ((blockcnt == pb->truncate_block) && pb->truncate_offset) {
+ pb->errcode = io_channel_read_blk64(fs->io, blk, 1,
+ pb->buf);
+ if (pb->errcode)
+ goto return_abort;
+ memset(pb->buf + pb->truncate_offset, 0,
+ fs->blocksize - pb->truncate_offset);
+ pb->errcode = io_channel_write_blk64(fs->io, blk, 1,
+ pb->buf);
+ if (pb->errcode)
+ goto return_abort;
+ }
+ pb->truncated_blocks++;
+ *block_nr = 0;
+ retval |= BLOCK_CHANGED;
+ }
+
+ if (ctx->qctx)
+ quota_data_sub(ctx->qctx, pb->inode, 0, ctx->fs->blocksize);
+ ext2fs_block_alloc_stats2(fs, blk, -1);
+ ctx->free_blocks++;
+ return retval;
+}
+
+/*
+ * This function releases an inode. Returns 1 if an inconsistency was
+ * found. If the inode has a link count, then it is being truncated and
+ * not deleted.
+ */
+static int release_inode_blocks(e2fsck_t ctx, ext2_ino_t ino,
+ struct ext2_inode_large *inode, char *block_buf,
+ struct problem_context *pctx)
+{
+ struct process_block_struct pb;
+ ext2_filsys fs = ctx->fs;
+ blk64_t blk;
+ errcode_t retval;
+ __u32 count;
+
+ if (!ext2fs_inode_has_valid_blocks2(fs, EXT2_INODE(inode)))
+ return 0;
+
+ pb.buf = block_buf + 3 * ctx->fs->blocksize;
+ pb.ctx = ctx;
+ pb.abort = 0;
+ pb.errcode = 0;
+ pb.pctx = pctx;
+ pb.last_cluster = 0;
+ pb.inode = inode;
+ if (inode->i_links_count) {
+ pb.truncating = 1;
+ pb.truncate_block = (e2_blkcnt_t)
+ ((EXT2_I_SIZE(inode) + fs->blocksize - 1) /
+ fs->blocksize);
+ pb.truncate_offset = inode->i_size % fs->blocksize;
+ } else {
+ pb.truncating = 0;
+ pb.truncate_block = 0;
+ pb.truncate_offset = 0;
+ }
+ pb.truncated_blocks = 0;
+ retval = ext2fs_block_iterate3(fs, ino, BLOCK_FLAG_DEPTH_TRAVERSE,
+ block_buf, release_inode_block, &pb);
+ if (retval) {
+ com_err("release_inode_blocks", retval,
+ _("while calling ext2fs_block_iterate for inode %u"),
+ ino);
+ return 1;
+ }
+ if (pb.abort)
+ return 1;
+
+ /* Refresh the inode since ext2fs_block_iterate may have changed it */
+ e2fsck_read_inode_full(ctx, ino, EXT2_INODE(inode), sizeof(*inode),
+ "release_inode_blocks");
+
+ if (pb.truncated_blocks)
+ ext2fs_iblk_sub_blocks(fs, EXT2_INODE(inode),
+ pb.truncated_blocks);
+
+ blk = ext2fs_file_acl_block(fs, EXT2_INODE(inode));
+ if (blk) {
+ retval = ext2fs_adjust_ea_refcount3(fs, blk, block_buf, -1,
+ &count, ino);
+ if (retval == EXT2_ET_BAD_EA_BLOCK_NUM) {
+ retval = 0;
+ count = 1;
+ }
+ if (retval) {
+ com_err("release_inode_blocks", retval,
+ _("while calling ext2fs_adjust_ea_refcount2 for inode %u"),
+ ino);
+ return 1;
+ }
+ if (count == 0) {
+ if (ctx->qctx)
+ quota_data_sub(ctx->qctx, inode, 0,
+ ctx->fs->blocksize);
+ ext2fs_block_alloc_stats2(fs, blk, -1);
+ ctx->free_blocks++;
+ }
+ ext2fs_file_acl_block_set(fs, EXT2_INODE(inode), 0);
+ }
+ return 0;
+}
+
+/* Load all quota data in preparation for orphan clearing. */
+static errcode_t e2fsck_read_all_quotas(e2fsck_t ctx)
+{
+ ext2_ino_t qf_ino;
+ enum quota_type qtype;
+ errcode_t retval = 0;
+
+ if (!ext2fs_has_feature_quota(ctx->fs->super))
+ return retval;
+
+ retval = quota_init_context(&ctx->qctx, ctx->fs, 0);
+ if (retval)
+ return retval;
+
+ for (qtype = 0 ; qtype < MAXQUOTAS; qtype++) {
+ qf_ino = *quota_sb_inump(ctx->fs->super, qtype);
+ if (qf_ino == 0)
+ continue;
+
+ retval = quota_read_all_dquots(ctx->qctx, qf_ino, qtype,
+ QREAD_USAGE | QREAD_LIMITS);
+ if (retval)
+ break;
+ }
+ if (retval)
+ quota_release_context(&ctx->qctx);
+ return retval;
+}
+
+/* Write all the quota info to disk. */
+static errcode_t e2fsck_write_all_quotas(e2fsck_t ctx)
+{
+ struct problem_context pctx;
+ enum quota_type qtype;
+
+ if (!ext2fs_has_feature_quota(ctx->fs->super))
+ return 0;
+
+ clear_problem_context(&pctx);
+ for (qtype = 0 ; qtype < MAXQUOTAS; qtype++) {
+ pctx.num = qtype;
+ pctx.errcode = quota_write_inode(ctx->qctx, 1 << qtype);
+ if (pctx.errcode) {
+ fix_problem(ctx, PR_6_WRITE_QUOTAS, &pctx);
+ break;
+ }
+ }
+
+ quota_release_context(&ctx->qctx);
+ return pctx.errcode;
+}
+
+static int release_orphan_inode(e2fsck_t ctx, ext2_ino_t *ino, char *block_buf)
+{
+ ext2_filsys fs = ctx->fs;
+ struct problem_context pctx;
+ struct ext2_inode_large inode;
+ ext2_ino_t next_ino;
+
+ e2fsck_read_inode_full(ctx, *ino, EXT2_INODE(&inode),
+ sizeof(inode), "release_orphan_inode");
+ clear_problem_context(&pctx);
+ pctx.ino = *ino;
+ pctx.inode = EXT2_INODE(&inode);
+ pctx.str = inode.i_links_count ? _("Truncating") : _("Clearing");
+
+ fix_problem(ctx, PR_0_ORPHAN_CLEAR_INODE, &pctx);
+
+ next_ino = inode.i_dtime;
+ if (next_ino &&
+ ((next_ino < EXT2_FIRST_INODE(fs->super)) ||
+ (next_ino > fs->super->s_inodes_count))) {
+ pctx.ino = next_ino;
+ fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_INODE, &pctx);
+ return 1;
+ }
+
+ if (release_inode_blocks(ctx, *ino, &inode, block_buf, &pctx))
+ return 1;
+
+ if (!inode.i_links_count) {
+ if (ctx->qctx)
+ quota_data_inodes(ctx->qctx, &inode, *ino, -1);
+ ext2fs_inode_alloc_stats2(fs, *ino, -1,
+ LINUX_S_ISDIR(inode.i_mode));
+ ctx->free_inodes++;
+ inode.i_dtime = ctx->now;
+ } else {
+ inode.i_dtime = 0;
+ }
+ e2fsck_write_inode_full(ctx, *ino, EXT2_INODE(&inode),
+ sizeof(inode), "delete_file");
+ *ino = next_ino;
+ return 0;
+}
+
+struct process_orphan_block_data {
+ e2fsck_t ctx;
+ char *buf;
+ char *block_buf;
+ e2_blkcnt_t blocks;
+ int abort;
+ int clear;
+ errcode_t errcode;
+ ext2_ino_t ino;
+ __u32 generation;
+};
+
+static int process_orphan_block(ext2_filsys fs,
+ blk64_t *block_nr,
+ e2_blkcnt_t blockcnt,
+ blk64_t ref_blk EXT2FS_ATTR((unused)),
+ int ref_offset EXT2FS_ATTR((unused)),
+ void *priv_data)
+{
+ struct process_orphan_block_data *pd;
+ e2fsck_t ctx;
+ struct problem_context pctx;
+ blk64_t blk = *block_nr;
+ struct ext4_orphan_block_tail *tail;
+ int j;
+ int inodes_per_ob;
+ __u32 *bdata;
+ ext2_ino_t ino;
+
+ pd = priv_data;
+ ctx = pd->ctx;
+ clear_problem_context(&pctx);
+ pctx.ino = fs->super->s_orphan_file_inum;
+ pctx.blk = blockcnt;
+
+ /* Orphan file must not have holes */
+ if (!blk) {
+ if (blockcnt == pd->blocks)
+ return BLOCK_ABORT;
+ fix_problem(ctx, PR_0_ORPHAN_FILE_HOLE, &pctx);
+return_abort:
+ pd->abort = 1;
+ return BLOCK_ABORT;
+ }
+ inodes_per_ob = ext2fs_inodes_per_orphan_block(fs);
+ pd->errcode = io_channel_read_blk64(fs->io, blk, 1, pd->buf);
+ if (pd->errcode)
+ goto return_abort;
+ tail = ext2fs_orphan_block_tail(fs, pd->buf);
+ if (ext2fs_le32_to_cpu(tail->ob_magic) !=
+ EXT4_ORPHAN_BLOCK_MAGIC) {
+ fix_problem(ctx, PR_0_ORPHAN_FILE_BAD_MAGIC, &pctx);
+ goto return_abort;
+ }
+ if (!ext2fs_orphan_file_block_csum_verify(fs,
+ fs->super->s_orphan_file_inum, blk, pd->buf)) {
+ fix_problem(ctx, PR_0_ORPHAN_FILE_BAD_CHECKSUM, &pctx);
+ goto return_abort;
+ }
+ bdata = (__u32 *)pd->buf;
+ for (j = 0; j < inodes_per_ob; j++) {
+ if (!bdata[j])
+ continue;
+ ino = ext2fs_le32_to_cpu(bdata[j]);
+ if (release_orphan_inode(ctx, &ino, pd->block_buf))
+ goto return_abort;
+ }
+ return 0;
+}
+
+static int process_orphan_file(e2fsck_t ctx, char *block_buf)
+{
+ ext2_filsys fs = ctx->fs;
+ char *orphan_buf;
+ struct process_orphan_block_data pd;
+ int ret = 0;
+ ext2_ino_t orphan_inum = fs->super->s_orphan_file_inum;
+ struct ext2_inode orphan_inode;
+ struct problem_context pctx;
+ errcode_t retval;
+
+ if (!ext2fs_has_feature_orphan_file(fs->super))
+ return 0;
+
+ clear_problem_context(&pctx);
+ pctx.ino = orphan_inum;
+
+ orphan_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 4,
+ "orphan block buffer");
+ retval = ext2fs_read_inode(fs, orphan_inum, &orphan_inode);
+ if (retval < 0) {
+ com_err("process_orphan_file", retval,
+ _("while reading inode %d"), orphan_inum);
+ ret = 1;
+ goto out;
+ }
+ if (EXT2_I_SIZE(&orphan_inode) & (fs->blocksize - 1)) {
+ fix_problem(ctx, PR_0_ORPHAN_FILE_WRONG_SIZE, &pctx);
+ ret = 1;
+ goto out;
+ }
+ pd.buf = orphan_buf + 3 * fs->blocksize;
+ pd.block_buf = block_buf;
+ pd.blocks = EXT2_I_SIZE(&orphan_inode) / fs->blocksize;
+ pd.ctx = ctx;
+ pd.abort = 0;
+ pd.errcode = 0;
+ retval = ext2fs_block_iterate3(fs, orphan_inum,
+ BLOCK_FLAG_DATA_ONLY | BLOCK_FLAG_HOLE,
+ orphan_buf, process_orphan_block, &pd);
+ if (retval) {
+ com_err("process_orphan_block", retval,
+ _("while calling ext2fs_block_iterate for inode %d"),
+ orphan_inum);
+ ret = 1;
+ goto out;
+ }
+ if (pd.abort) {
+ if (pd.errcode) {
+ com_err("process_orphan_block", pd.errcode,
+ _("while reading blocks of inode %d"),
+ orphan_inum);
+ }
+ ret = 1;
+ }
+out:
+ ext2fs_free_mem(&orphan_buf);
+ return ret;
+}
+
+/*
+ * This function releases all of the orphan inodes. It returns 1 if
+ * it hit some error, and 0 on success.
+ */
+static int release_orphan_inodes(e2fsck_t ctx)
+{
+ ext2_filsys fs = ctx->fs;
+ ext2_ino_t ino;
+ struct problem_context pctx;
+ char *block_buf;
+
+ if (fs->super->s_last_orphan == 0 &&
+ !ext2fs_has_feature_orphan_present(fs->super))
+ return 0;
+
+ clear_problem_context(&pctx);
+ ino = fs->super->s_last_orphan;
+ pctx.ino = ino;
+ pctx.errcode = e2fsck_read_all_quotas(ctx);
+ if (pctx.errcode) {
+ fix_problem(ctx, PR_0_QUOTA_INIT_CTX, &pctx);
+ return 1;
+ }
+
+ /*
+ * Win or lose, we won't be using the head of the orphan inode
+ * list again.
+ */
+ fs->super->s_last_orphan = 0;
+ ext2fs_mark_super_dirty(fs);
+
+ /*
+ * If the filesystem contains errors, don't process the orphan list
+ * or orphan file, since neither can be trusted; and we're going to
+ * be running a full e2fsck run anyway... We clear orphan file contents
+ * after filesystem is checked to avoid clearing someone else's data.
+ */
+ if (fs->super->s_state & EXT2_ERROR_FS) {
+ if (ctx->qctx)
+ quota_release_context(&ctx->qctx);
+ return 0;
+ }
+
+ if (ino && ((ino < EXT2_FIRST_INODE(fs->super)) ||
+ (ino > fs->super->s_inodes_count))) {
+ fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_HEAD_INODE, &pctx);
+ goto err_qctx;
+ }
+
+ block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 4,
+ "block iterate buffer");
+ e2fsck_read_bitmaps(ctx);
+
+ /* First process orphan list */
+ while (ino) {
+ if (release_orphan_inode(ctx, &ino, block_buf))
+ goto err_buf;
+ }
+
+ /* Next process orphan file */
+ if (ext2fs_has_feature_orphan_present(fs->super) &&
+ !ext2fs_has_feature_orphan_file(fs->super))
+ goto err_buf;
+ if (process_orphan_file(ctx, block_buf))
+ goto err_buf;
+
+ ext2fs_free_mem(&block_buf);
+ pctx.errcode = e2fsck_write_all_quotas(ctx);
+ if (pctx.errcode)
+ goto err;
+ return 0;
+err_buf:
+ ext2fs_free_mem(&block_buf);
+err_qctx:
+ if (ctx->qctx)
+ quota_release_context(&ctx->qctx);
+err:
+ return 1;
+}
+
+static int reinit_orphan_block(ext2_filsys fs,
+ blk64_t *block_nr,
+ e2_blkcnt_t blockcnt,
+ blk64_t ref_blk EXT2FS_ATTR((unused)),
+ int ref_offset EXT2FS_ATTR((unused)),
+ void *priv_data)
+{
+ struct process_orphan_block_data *pd;
+ e2fsck_t ctx;
+ blk64_t blk = *block_nr;
+ struct problem_context pctx;
+
+ pd = priv_data;
+ ctx = pd->ctx;
+
+ /* Orphan file must not have holes */
+ if (!blk) {
+ if (blockcnt == pd->blocks)
+ return BLOCK_ABORT;
+
+ clear_problem_context(&pctx);
+ pctx.ino = fs->super->s_orphan_file_inum;
+ pctx.blk = blockcnt;
+ fix_problem(ctx, PR_6_ORPHAN_FILE_HOLE, &pctx);
+return_abort:
+ pd->abort = 1;
+ return BLOCK_ABORT;
+ }
+
+ if (ext2fs_has_feature_metadata_csum(fs->super)) {
+ struct ext4_orphan_block_tail *tail;
+
+ tail = ext2fs_orphan_block_tail(fs, pd->buf);
+ /*
+ * Update checksum to match expected buffer contents with
+ * appropriate block number.
+ */
+ tail->ob_checksum = ext2fs_do_orphan_file_block_csum(fs,
+ pd->ino, pd->generation, blk, pd->buf);
+ }
+ if (!pd->clear) {
+ pd->errcode = io_channel_read_blk64(fs->io, blk, 1,
+ pd->block_buf);
+ /* Block is already cleanly initialized? */
+ if (!memcmp(pd->block_buf, pd->buf, fs->blocksize))
+ return 0;
+
+ clear_problem_context(&pctx);
+ pctx.ino = fs->super->s_orphan_file_inum;
+ pctx.blk = blockcnt;
+ if (!fix_problem(ctx, PR_6_ORPHAN_BLOCK_DIRTY, &pctx))
+ goto return_abort;
+ pd->clear = 1;
+ }
+ pd->errcode = io_channel_write_blk64(fs->io, blk, 1, pd->buf);
+ if (pd->errcode)
+ goto return_abort;
+ return 0;
+}
+
+/*
+ * Check and clear orphan file. We just return non-zero if we hit some
+ * inconsistency. Caller will truncate & recreate new orphan file.
+ */
+int check_init_orphan_file(e2fsck_t ctx)
+{
+ ext2_filsys fs = ctx->fs;
+ char *orphan_buf;
+ struct process_orphan_block_data pd;
+ struct ext4_orphan_block_tail *tail;
+ ext2_ino_t orphan_inum = fs->super->s_orphan_file_inum;
+ struct ext2_inode orphan_inode;
+ int ret = 0;
+ errcode_t retval;
+
+ orphan_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 5,
+ "orphan block buffer");
+ e2fsck_read_inode(ctx, orphan_inum, &orphan_inode, "orphan inode");
+ if (EXT2_I_SIZE(&orphan_inode) & (fs->blocksize - 1)) {
+ struct problem_context pctx;
+
+ clear_problem_context(&pctx);
+ pctx.ino = orphan_inum;
+ fix_problem(ctx, PR_6_ORPHAN_FILE_WRONG_SIZE, &pctx);
+ ret = 1;
+ goto out;
+ }
+ pd.buf = orphan_buf + 3 * fs->blocksize;
+ pd.block_buf = orphan_buf + 4 * fs->blocksize;
+ pd.blocks = EXT2_I_SIZE(&orphan_inode) / fs->blocksize;
+ pd.ctx = ctx;
+ pd.abort = 0;
+ pd.clear = 0;
+ pd.errcode = 0;
+ pd.ino = orphan_inum;
+ pd.generation = orphan_inode.i_generation;
+ /* Initialize buffer to write */
+ memset(pd.buf, 0, fs->blocksize);
+ tail = ext2fs_orphan_block_tail(fs, pd.buf);
+ tail->ob_magic = ext2fs_cpu_to_le32(EXT4_ORPHAN_BLOCK_MAGIC);
+
+ retval = ext2fs_block_iterate3(fs, orphan_inum,
+ BLOCK_FLAG_DATA_ONLY | BLOCK_FLAG_HOLE,
+ orphan_buf, reinit_orphan_block, &pd);
+ if (retval) {
+ com_err("reinit_orphan_block", retval,
+ _("while calling ext2fs_block_iterate for inode %d"),
+ orphan_inum);
+ ret = 1;
+ goto out;
+ }
+ if (pd.abort) {
+ if (pd.errcode) {
+ com_err("process_orphan_block", pd.errcode,
+ _("while reading blocks of inode %d"),
+ orphan_inum);
+ }
+ ret = 1;
+ }
+
+ /* We had to clear some blocks. Report it up. */
+ if (ret == 0 && pd.clear)
+ ret = 2;
+out:
+ ext2fs_free_mem(&orphan_buf);
+ return ret;
+}
+
+/*
+ * Check the resize inode to make sure it is sane. We check both for
+ * the case where on-line resizing is not enabled (in which case the
+ * resize inode should be cleared) as well as the case where on-line
+ * resizing is enabled.
+ */
+void check_resize_inode(e2fsck_t ctx)
+{
+ ext2_filsys fs = ctx->fs;
+ struct ext2_inode inode;
+ struct problem_context pctx;
+ int i, gdt_off, ind_off;
+ dgrp_t j;
+ blk_t blk, pblk;
+ blk_t expect; /* for resize inode, which is 32-bit only */
+ __u32 *dind_buf = 0, *ind_buf;
+ errcode_t retval;
+
+ clear_problem_context(&pctx);
+
+ if (ext2fs_has_feature_resize_inode(fs->super) &&
+ ext2fs_has_feature_meta_bg(fs->super) &&
+ fix_problem(ctx, PR_0_DISABLE_RESIZE_INODE, &pctx)) {
+ ext2fs_clear_feature_resize_inode(fs->super);
+ fs->super->s_reserved_gdt_blocks = 0;
+ ext2fs_mark_super_dirty(fs);
+ }
+
+ /*
+ * If the resize inode feature isn't set, then
+ * s_reserved_gdt_blocks must be zero.
+ */
+ if (!ext2fs_has_feature_resize_inode(fs->super)) {
+ if (fs->super->s_reserved_gdt_blocks) {
+ pctx.num = fs->super->s_reserved_gdt_blocks;
+ if (fix_problem(ctx, PR_0_NONZERO_RESERVED_GDT_BLOCKS,
+ &pctx)) {
+ fs->super->s_reserved_gdt_blocks = 0;
+ ext2fs_mark_super_dirty(fs);
+ }
+ }
+ }
+
+ /* Read the resize inode */
+ pctx.ino = EXT2_RESIZE_INO;
+ retval = ext2fs_read_inode(fs, EXT2_RESIZE_INO, &inode);
+ if (retval) {
+ if (ext2fs_has_feature_resize_inode(fs->super))
+ ctx->flags |= E2F_FLAG_RESIZE_INODE;
+ return;
+ }
+
+ /*
+ * If the resize inode feature isn't set, check to make sure
+ * the resize inode is cleared; then we're done.
+ */
+ if (!ext2fs_has_feature_resize_inode(fs->super)) {
+ for (i=0; i < EXT2_N_BLOCKS; i++) {
+ if (inode.i_block[i])
+ break;
+ }
+ if ((i < EXT2_N_BLOCKS) &&
+ fix_problem(ctx, PR_0_CLEAR_RESIZE_INODE, &pctx)) {
+ memset(&inode, 0, sizeof(inode));
+ e2fsck_write_inode(ctx, EXT2_RESIZE_INO, &inode,
+ "clear_resize");
+ }
+ return;
+ }
+
+ /*
+ * The resize inode feature is enabled; check to make sure the
+ * only block in use is the double indirect block
+ */
+ blk = inode.i_block[EXT2_DIND_BLOCK];
+ for (i=0; i < EXT2_N_BLOCKS; i++) {
+ if (i != EXT2_DIND_BLOCK && inode.i_block[i])
+ break;
+ }
+ if ((i < EXT2_N_BLOCKS) || !blk || !inode.i_links_count ||
+ !(inode.i_mode & LINUX_S_IFREG) ||
+ (blk < fs->super->s_first_data_block ||
+ blk >= ext2fs_blocks_count(fs->super))) {
+ resize_inode_invalid:
+ if (fix_problem(ctx, PR_0_RESIZE_INODE_INVALID, &pctx)) {
+ memset(&inode, 0, sizeof(inode));
+ e2fsck_write_inode(ctx, EXT2_RESIZE_INO, &inode,
+ "clear_resize");
+ ctx->flags |= E2F_FLAG_RESIZE_INODE;
+ }
+ if (!(ctx->options & E2F_OPT_READONLY)) {
+ fs->super->s_state &= ~EXT2_VALID_FS;
+ ext2fs_mark_super_dirty(fs);
+ }
+ goto cleanup;
+ }
+ dind_buf = (__u32 *) e2fsck_allocate_memory(ctx, fs->blocksize * 2,
+ "resize dind buffer");
+ ind_buf = (__u32 *) ((char *) dind_buf + fs->blocksize);
+
+ retval = ext2fs_read_ind_block(fs, blk, dind_buf);
+ if (retval)
+ goto resize_inode_invalid;
+
+ gdt_off = fs->desc_blocks;
+ pblk = fs->super->s_first_data_block + 1 + fs->desc_blocks;
+ if (fs->blocksize == 1024 && fs->super->s_first_data_block == 0)
+ pblk++; /* Deal with 1024 blocksize bigalloc fs */
+ for (i = 0; i < fs->super->s_reserved_gdt_blocks / 4;
+ i++, gdt_off++, pblk++) {
+ gdt_off %= fs->blocksize/4;
+ if (dind_buf[gdt_off] != pblk)
+ goto resize_inode_invalid;
+ retval = ext2fs_read_ind_block(fs, pblk, ind_buf);
+ if (retval)
+ goto resize_inode_invalid;
+ ind_off = 0;
+ for (j = 1; j < fs->group_desc_count; j++) {
+ if (!ext2fs_bg_has_super(fs, j))
+ continue;
+ expect = pblk + EXT2_GROUPS_TO_BLOCKS(fs->super, j);
+ if (ind_buf[ind_off] != expect)
+ goto resize_inode_invalid;
+ ind_off++;
+ }
+ }
+
+cleanup:
+ if (dind_buf)
+ ext2fs_free_mem(&dind_buf);
+
+ }
+
+/*
+ * This function checks the dirhash signed/unsigned hint if necessary.
+ */
+static void e2fsck_fix_dirhash_hint(e2fsck_t ctx)
+{
+ struct ext2_super_block *sb = ctx->fs->super;
+ struct problem_context pctx;
+ char c;
+
+ if ((ctx->options & E2F_OPT_READONLY) ||
+ !ext2fs_has_feature_dir_index(sb) ||
+ (sb->s_flags & (EXT2_FLAGS_SIGNED_HASH|EXT2_FLAGS_UNSIGNED_HASH)))
+ return;
+
+ c = (char) 255;
+
+ clear_problem_context(&pctx);
+ if (fix_problem(ctx, PR_0_DIRHASH_HINT, &pctx)) {
+ if (((int) c) == -1) {
+ sb->s_flags |= EXT2_FLAGS_SIGNED_HASH;
+ } else {
+ sb->s_flags |= EXT2_FLAGS_UNSIGNED_HASH;
+ }
+ ext2fs_mark_super_dirty(ctx->fs);
+ }
+}
+
+
+void check_super_block(e2fsck_t ctx)
+{
+ ext2_filsys fs = ctx->fs;
+ blk64_t first_block, last_block;
+ struct ext2_super_block *sb = fs->super;
+ unsigned int ipg_max;
+ problem_t problem;
+ blk64_t blocks_per_group = fs->super->s_blocks_per_group;
+ __u32 bpg_max, cpg_max;
+ __u64 blks_max;
+ int inodes_per_block;
+ int inode_size;
+ int accept_time_fudge;
+ int broken_system_clock;
+ dgrp_t i;
+ blk64_t should_be;
+ struct problem_context pctx;
+ blk64_t free_blocks = 0;
+ ext2_ino_t free_inodes = 0;
+ int csum_flag, clear_test_fs_flag;
+
+ inodes_per_block = EXT2_INODES_PER_BLOCK(fs->super);
+ ipg_max = inodes_per_block * (blocks_per_group - 4);
+ if (ipg_max > EXT2_MAX_INODES_PER_GROUP(sb))
+ ipg_max = EXT2_MAX_INODES_PER_GROUP(sb);
+ cpg_max = 8 * EXT2_BLOCK_SIZE(sb);
+ if (cpg_max > EXT2_MAX_CLUSTERS_PER_GROUP(sb))
+ cpg_max = EXT2_MAX_CLUSTERS_PER_GROUP(sb);
+ bpg_max = 8 * EXT2_BLOCK_SIZE(sb) * EXT2FS_CLUSTER_RATIO(fs);
+ if (bpg_max > EXT2_MAX_BLOCKS_PER_GROUP(sb))
+ bpg_max = EXT2_MAX_BLOCKS_PER_GROUP(sb);
+
+ 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");
+
+ blks_max = (1ULL << 32) * EXT2_MAX_BLOCKS_PER_GROUP(fs->super);
+ if (ext2fs_has_feature_64bit(fs->super)) {
+ if (blks_max > ((1ULL << 48) - 1))
+ blks_max = (1ULL << 48) - 1;
+ } else {
+ if (blks_max > ((1ULL << 32) - 1))
+ blks_max = (1ULL << 32) - 1;
+ }
+
+ clear_problem_context(&pctx);
+
+ /*
+ * Verify the super block constants...
+ */
+ if (!check_super_value(ctx, "inodes_count", sb->s_inodes_count,
+ MIN_CHECK, 1, 0))
+ return;
+ if (!check_super_value64(ctx, "blocks_count", ext2fs_blocks_count(sb),
+ MIN_CHECK | MAX_CHECK, 1, blks_max))
+ return;
+ if (!check_super_value(ctx, "first_data_block", sb->s_first_data_block,
+ MAX_CHECK, 0, ext2fs_blocks_count(sb)))
+ return;
+ if (!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))
+ return;
+ if (!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)))
+ return;
+ if (!check_super_value(ctx, "clusters_per_group",
+ sb->s_clusters_per_group,
+ MIN_CHECK | MAX_CHECK, 8, cpg_max))
+ return;
+ if (!check_super_value(ctx, "blocks_per_group", sb->s_blocks_per_group,
+ MIN_CHECK | MAX_CHECK, 8, bpg_max))
+ return;
+ if (!check_super_value(ctx, "inodes_per_group", sb->s_inodes_per_group,
+ MIN_CHECK | MAX_CHECK, inodes_per_block, ipg_max))
+ return;
+ if (!check_super_value(ctx, "r_blocks_count", ext2fs_r_blocks_count(sb),
+ MAX_CHECK, 0, ext2fs_blocks_count(sb) / 2))
+ return;
+ if (!check_super_value(ctx, "reserved_gdt_blocks",
+ sb->s_reserved_gdt_blocks, MAX_CHECK, 0,
+ fs->blocksize / sizeof(__u32)))
+ return;
+ if (!check_super_value(ctx, "desc_size",
+ sb->s_desc_size, MAX_CHECK | LOG2_CHECK, 0,
+ EXT2_MAX_DESC_SIZE))
+ return;
+
+ should_be = (__u64)sb->s_inodes_per_group * fs->group_desc_count;
+ if (should_be > ~0U) {
+ pctx.num = should_be;
+ fix_problem(ctx, PR_0_INODE_COUNT_BIG, &pctx);
+ ctx->flags |= E2F_FLAG_ABORT;
+ return;
+ }
+ 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);
+ } else {
+ pctx.num = sb->s_inodes_count;
+ pctx.str = "inodes_count";
+ fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx);
+ ctx->flags |= E2F_FLAG_ABORT;
+ return;
+ }
+ }
+ 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))
+ return;
+ inode_size = EXT2_INODE_SIZE(sb);
+ if (!check_super_value(ctx, "inode_size",
+ inode_size, MIN_CHECK | MAX_CHECK | LOG2_CHECK,
+ EXT2_GOOD_OLD_INODE_SIZE, fs->blocksize))
+ return;
+ 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;
+ 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;
+ }
+
+ if (EXT2_INODE_SIZE(sb) > EXT2_GOOD_OLD_INODE_SIZE) {
+ unsigned min =
+ sizeof(((struct ext2_inode_large *) 0)->i_extra_isize) +
+ sizeof(((struct ext2_inode_large *) 0)->i_checksum_hi);
+ unsigned max = EXT2_INODE_SIZE(sb) - EXT2_GOOD_OLD_INODE_SIZE;
+ pctx.num = sb->s_min_extra_isize;
+ if (sb->s_min_extra_isize &&
+ (sb->s_min_extra_isize < min ||
+ sb->s_min_extra_isize > max ||
+ sb->s_min_extra_isize & 3) &&
+ fix_problem(ctx, PR_0_BAD_MIN_EXTRA_ISIZE, &pctx)) {
+ sb->s_min_extra_isize =
+ (sizeof(struct ext2_inode_large) -
+ EXT2_GOOD_OLD_INODE_SIZE);
+ ext2fs_mark_super_dirty(fs);
+ }
+ pctx.num = sb->s_want_extra_isize;
+ if (sb->s_want_extra_isize &&
+ (sb->s_want_extra_isize < min ||
+ sb->s_want_extra_isize > max ||
+ sb->s_want_extra_isize & 3) &&
+ fix_problem(ctx, PR_0_BAD_WANT_EXTRA_ISIZE, &pctx)) {
+ sb->s_want_extra_isize =
+ (sizeof(struct ext2_inode_large) -
+ EXT2_GOOD_OLD_INODE_SIZE);
+ ext2fs_mark_super_dirty(fs);
+ }
+ }
+
+ /* Are metadata_csum and uninit_bg both set? */
+ if (ext2fs_has_feature_metadata_csum(fs->super) &&
+ ext2fs_has_feature_gdt_csum(fs->super) &&
+ fix_problem(ctx, PR_0_META_AND_GDT_CSUM_SET, &pctx)) {
+ ext2fs_clear_feature_gdt_csum(fs->super);
+ ext2fs_mark_super_dirty(fs);
+ for (i = 0; i < fs->group_desc_count; i++)
+ ext2fs_group_desc_csum_set(fs, i);
+ }
+
+ /* We can't have ^metadata_csum,metadata_csum_seed */
+ if (!ext2fs_has_feature_metadata_csum(fs->super) &&
+ ext2fs_has_feature_csum_seed(fs->super) &&
+ fix_problem(ctx, PR_0_CSUM_SEED_WITHOUT_META_CSUM, &pctx)) {
+ ext2fs_clear_feature_csum_seed(fs->super);
+ fs->super->s_checksum_seed = 0;
+ ext2fs_mark_super_dirty(fs);
+ }
+
+ /* Is 64bit set and extents unset? */
+ if (ext2fs_has_feature_64bit(fs->super) &&
+ !ext2fs_has_feature_extents(fs->super) &&
+ fix_problem(ctx, PR_0_64BIT_WITHOUT_EXTENTS, &pctx)) {
+ ext2fs_set_feature_extents(fs->super);
+ ext2fs_mark_super_dirty(fs);
+ }
+
+ /* Did user ask us to convert files to extents? */
+ if (ctx->options & E2F_OPT_CONVERT_BMAP) {
+ ext2fs_set_feature_extents(fs->super);
+ ext2fs_mark_super_dirty(fs);
+ }
+
+ if (ext2fs_has_feature_meta_bg(fs->super) &&
+ (fs->super->s_first_meta_bg > fs->desc_blocks)) {
+ pctx.group = fs->desc_blocks;
+ pctx.num = fs->super->s_first_meta_bg;
+ if (fix_problem(ctx, PR_0_FIRST_META_BG_TOO_BIG, &pctx)) {
+ ext2fs_clear_feature_meta_bg(fs->super);
+ fs->super->s_first_meta_bg = 0;
+ 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 = ext2fs_has_group_desc_csum(fs);
+ for (i = 0; i < fs->group_desc_count; i++) {
+ pctx.group = i;
+
+ if (!ext2fs_has_feature_flex_bg(fs->super)) {
+ 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)) {
+ pctx.csum1 = ext2fs_bg_checksum(fs, i);
+ pctx.csum2 = ext2fs_group_desc_csum(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 (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.
+ * Skip if checksums are enabled and the filesystem is mounted,
+ * if the id changes under the kernel remounting rw may fail.
+ */
+ if (!(ctx->options & E2F_OPT_READONLY) && uuid_is_null(sb->s_uuid) &&
+ !ext2fs_has_feature_metadata_csum(ctx->fs->super) &&
+ (!csum_flag || !(ctx->mount_flags & EXT2_MF_MOUNTED))) {
+ if (fix_problem(ctx, PR_0_ADD_UUID, &pctx)) {
+ uuid_generate(sb->s_uuid);
+ ext2fs_init_csum_seed(fs);
+ 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 &&
+ ext2fs_has_feature_filetype(fs->super)) {
+ if (fix_problem(ctx, PR_0_HURD_CLEAR_FILETYPE, &pctx)) {
+ ext2fs_clear_feature_filetype(fs->super);
+ 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 (((ctx->options & E2F_OPT_FORCE) || fs->super->s_checkinterval) &&
+ !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 (((ctx->options & E2F_OPT_FORCE) || fs->super->s_checkinterval) &&
+ !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;
+ }
+ }
+
+ e2fsck_validate_quota_inodes(ctx);
+
+ /*
+ * 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 = ext2fs_group_first_block2(fs, g);
+
+ 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_blocks_count_hi) ||
+ SUPER_DIFFERENT(s_inodes_count) ||
+ memcmp(fs->super->s_uuid, backup_sb->s_uuid,
+ sizeof(fs->super->s_uuid)))
+ ret = 1;
+ break;
+ }
+ return ret;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 12:09:27 +0000