| /* |
| * journal.c --- code for handling the "ext3" journal |
| * |
| * Copyright (C) 2000 Andreas Dilger |
| * Copyright (C) 2000 Theodore Ts'o |
| * |
| * Parts of the code are based on fs/jfs/journal.c by Stephen C. Tweedie |
| * Copyright (C) 1999 Red Hat Software |
| * |
| * This file may be redistributed under the terms of the |
| * GNU General Public License version 2 or at your discretion |
| * any later version. |
| */ |
| |
| #include "config.h" |
| #ifdef HAVE_SYS_MOUNT_H |
| #include <sys/param.h> |
| #include <sys/mount.h> |
| #define MNT_FL (MS_MGC_VAL | MS_RDONLY) |
| #endif |
| #ifdef HAVE_SYS_STAT_H |
| #include <sys/stat.h> |
| #endif |
| |
| #define E2FSCK_INCLUDE_INLINE_FUNCS |
| #include "jfs_user.h" |
| #include "problem.h" |
| #include "uuid/uuid.h" |
| |
| static int bh_count = 0; |
| |
| /* |
| * Define USE_INODE_IO to use the inode_io.c / fileio.c codepaths. |
| * This creates a larger static binary, and a smaller binary using |
| * shared libraries. It's also probably slightly less CPU-efficient, |
| * which is why it's not on by default. But, it's a good way of |
| * testing the functions in inode_io.c and fileio.c. |
| */ |
| #undef USE_INODE_IO |
| |
| /* Checksumming functions */ |
| static int e2fsck_journal_verify_csum_type(journal_t *j, |
| journal_superblock_t *jsb) |
| { |
| if (!jbd2_journal_has_csum_v2or3(j)) |
| return 1; |
| |
| return jsb->s_checksum_type == JBD2_CRC32C_CHKSUM; |
| } |
| |
| static __u32 e2fsck_journal_sb_csum(journal_superblock_t *jsb) |
| { |
| __u32 crc, old_crc; |
| |
| old_crc = jsb->s_checksum; |
| jsb->s_checksum = 0; |
| crc = ext2fs_crc32c_le(~0, (unsigned char *)jsb, |
| sizeof(journal_superblock_t)); |
| jsb->s_checksum = old_crc; |
| |
| return crc; |
| } |
| |
| static int e2fsck_journal_sb_csum_verify(journal_t *j, |
| journal_superblock_t *jsb) |
| { |
| __u32 provided, calculated; |
| |
| if (!jbd2_journal_has_csum_v2or3(j)) |
| return 1; |
| |
| provided = ext2fs_be32_to_cpu(jsb->s_checksum); |
| calculated = e2fsck_journal_sb_csum(jsb); |
| |
| return provided == calculated; |
| } |
| |
| static errcode_t e2fsck_journal_sb_csum_set(journal_t *j, |
| journal_superblock_t *jsb) |
| { |
| __u32 crc; |
| |
| if (!jbd2_journal_has_csum_v2or3(j)) |
| return 0; |
| |
| crc = e2fsck_journal_sb_csum(jsb); |
| jsb->s_checksum = ext2fs_cpu_to_be32(crc); |
| return 0; |
| } |
| |
| /* Kernel compatibility functions for handling the journal. These allow us |
| * to use the recovery.c file virtually unchanged from the kernel, so we |
| * don't have to do much to keep kernel and user recovery in sync. |
| */ |
| int jbd2_journal_bmap(journal_t *journal, unsigned long block, |
| unsigned long long *phys) |
| { |
| #ifdef USE_INODE_IO |
| *phys = block; |
| return 0; |
| #else |
| struct inode *inode = journal->j_inode; |
| errcode_t retval; |
| blk64_t pblk; |
| |
| if (!inode) { |
| *phys = block; |
| return 0; |
| } |
| |
| retval= ext2fs_bmap2(inode->i_ctx->fs, inode->i_ino, |
| &inode->i_ext2, NULL, 0, (blk64_t) block, |
| 0, &pblk); |
| *phys = pblk; |
| return -1 * ((int) retval); |
| #endif |
| } |
| |
| struct buffer_head *getblk(kdev_t kdev, unsigned long long blocknr, |
| int blocksize) |
| { |
| struct buffer_head *bh; |
| int bufsize = sizeof(*bh) + kdev->k_ctx->fs->blocksize - |
| sizeof(bh->b_data); |
| |
| bh = e2fsck_allocate_memory(kdev->k_ctx, bufsize, "block buffer"); |
| if (!bh) |
| return NULL; |
| |
| if (journal_enable_debug >= 3) |
| bh_count++; |
| jfs_debug(4, "getblk for block %llu (%d bytes)(total %d)\n", |
| blocknr, blocksize, bh_count); |
| |
| bh->b_ctx = kdev->k_ctx; |
| if (kdev->k_dev == K_DEV_FS) |
| bh->b_io = kdev->k_ctx->fs->io; |
| else |
| bh->b_io = kdev->k_ctx->journal_io; |
| bh->b_size = blocksize; |
| bh->b_blocknr = blocknr; |
| |
| return bh; |
| } |
| |
| int sync_blockdev(kdev_t kdev) |
| { |
| io_channel io; |
| |
| if (kdev->k_dev == K_DEV_FS) |
| io = kdev->k_ctx->fs->io; |
| else |
| io = kdev->k_ctx->journal_io; |
| |
| return io_channel_flush(io) ? -EIO : 0; |
| } |
| |
| void ll_rw_block(int rw, int op_flags EXT2FS_ATTR((unused)), int nr, |
| struct buffer_head *bhp[]) |
| { |
| errcode_t retval; |
| struct buffer_head *bh; |
| |
| for (; nr > 0; --nr) { |
| bh = *bhp++; |
| if (rw == REQ_OP_READ && !bh->b_uptodate) { |
| jfs_debug(3, "reading block %llu/%p\n", |
| bh->b_blocknr, (void *) bh); |
| retval = io_channel_read_blk64(bh->b_io, |
| bh->b_blocknr, |
| 1, bh->b_data); |
| if (retval) { |
| com_err(bh->b_ctx->device_name, retval, |
| "while reading block %llu\n", |
| bh->b_blocknr); |
| bh->b_err = (int) retval; |
| continue; |
| } |
| bh->b_uptodate = 1; |
| } else if (rw == REQ_OP_WRITE && bh->b_dirty) { |
| jfs_debug(3, "writing block %llu/%p\n", |
| bh->b_blocknr, |
| (void *) bh); |
| retval = io_channel_write_blk64(bh->b_io, |
| bh->b_blocknr, |
| 1, bh->b_data); |
| if (retval) { |
| com_err(bh->b_ctx->device_name, retval, |
| "while writing block %llu\n", |
| bh->b_blocknr); |
| bh->b_err = (int) retval; |
| continue; |
| } |
| bh->b_dirty = 0; |
| bh->b_uptodate = 1; |
| } else { |
| jfs_debug(3, "no-op %s for block %llu\n", |
| rw == REQ_OP_READ ? "read" : "write", |
| bh->b_blocknr); |
| } |
| } |
| } |
| |
| void mark_buffer_dirty(struct buffer_head *bh) |
| { |
| bh->b_dirty = 1; |
| } |
| |
| static void mark_buffer_clean(struct buffer_head * bh) |
| { |
| bh->b_dirty = 0; |
| } |
| |
| void brelse(struct buffer_head *bh) |
| { |
| if (bh->b_dirty) |
| ll_rw_block(REQ_OP_WRITE, 0, 1, &bh); |
| jfs_debug(3, "freeing block %llu/%p (total %d)\n", |
| bh->b_blocknr, (void *) bh, --bh_count); |
| ext2fs_free_mem(&bh); |
| } |
| |
| int buffer_uptodate(struct buffer_head *bh) |
| { |
| return bh->b_uptodate; |
| } |
| |
| void mark_buffer_uptodate(struct buffer_head *bh, int val) |
| { |
| bh->b_uptodate = val; |
| } |
| |
| void wait_on_buffer(struct buffer_head *bh) |
| { |
| if (!bh->b_uptodate) |
| ll_rw_block(REQ_OP_READ, 0, 1, &bh); |
| } |
| |
| |
| static void e2fsck_clear_recover(e2fsck_t ctx, int error) |
| { |
| ext2fs_clear_feature_journal_needs_recovery(ctx->fs->super); |
| |
| /* if we had an error doing journal recovery, we need a full fsck */ |
| if (error) |
| ctx->fs->super->s_state &= ~EXT2_VALID_FS; |
| ext2fs_mark_super_dirty(ctx->fs); |
| } |
| |
| /* |
| * This is a helper function to check the validity of the journal. |
| */ |
| struct process_block_struct { |
| e2_blkcnt_t last_block; |
| }; |
| |
| static int process_journal_block(ext2_filsys fs, |
| blk64_t *block_nr, |
| e2_blkcnt_t blockcnt, |
| blk64_t ref_block EXT2FS_ATTR((unused)), |
| int ref_offset EXT2FS_ATTR((unused)), |
| void *priv_data) |
| { |
| struct process_block_struct *p; |
| blk64_t blk = *block_nr; |
| |
| p = (struct process_block_struct *) priv_data; |
| |
| if (!blk || blk < fs->super->s_first_data_block || |
| blk >= ext2fs_blocks_count(fs->super)) |
| return BLOCK_ABORT; |
| |
| if (blockcnt >= 0) |
| p->last_block = blockcnt; |
| return 0; |
| } |
| |
| static int ext4_fc_replay_scan(journal_t *j, struct buffer_head *bh, |
| int off, tid_t expected_tid) |
| { |
| e2fsck_t ctx = j->j_fs_dev->k_ctx; |
| struct e2fsck_fc_replay_state *state; |
| int ret = JBD2_FC_REPLAY_CONTINUE; |
| struct ext4_fc_add_range *ext; |
| struct ext4_fc_tl *tl; |
| struct ext4_fc_tail *tail; |
| __u8 *start, *end; |
| struct ext4_fc_head *head; |
| struct ext2fs_extent ext2fs_ex = {0}; |
| |
| state = &ctx->fc_replay_state; |
| |
| start = (__u8 *)bh->b_data; |
| end = (__u8 *)bh->b_data + j->j_blocksize - 1; |
| |
| jbd_debug(1, "Scan phase starting, expected %d", expected_tid); |
| if (state->fc_replay_expected_off == 0) { |
| memset(state, 0, sizeof(*state)); |
| /* Check if we can stop early */ |
| if (le16_to_cpu(((struct ext4_fc_tl *)start)->fc_tag) |
| != EXT4_FC_TAG_HEAD) { |
| jbd_debug(1, "Ending early!, not a head tag"); |
| return 0; |
| } |
| } |
| |
| if (off != state->fc_replay_expected_off) { |
| ret = -EFSCORRUPTED; |
| goto out_err; |
| } |
| |
| state->fc_replay_expected_off++; |
| fc_for_each_tl(start, end, tl) { |
| jbd_debug(3, "Scan phase, tag:%s, blk %lld\n", |
| tag2str(le16_to_cpu(tl->fc_tag)), bh->b_blocknr); |
| switch (le16_to_cpu(tl->fc_tag)) { |
| case EXT4_FC_TAG_ADD_RANGE: |
| ext = (struct ext4_fc_add_range *)ext4_fc_tag_val(tl); |
| ret = ext2fs_decode_extent(&ext2fs_ex, (void *)&ext->fc_ex, |
| sizeof(ext->fc_ex)); |
| if (ret) |
| ret = JBD2_FC_REPLAY_STOP; |
| else |
| ret = JBD2_FC_REPLAY_CONTINUE; |
| /* fallthrough */ |
| case EXT4_FC_TAG_DEL_RANGE: |
| case EXT4_FC_TAG_LINK: |
| case EXT4_FC_TAG_UNLINK: |
| case EXT4_FC_TAG_CREAT: |
| case EXT4_FC_TAG_INODE: |
| case EXT4_FC_TAG_PAD: |
| state->fc_cur_tag++; |
| state->fc_crc = jbd2_chksum(j, state->fc_crc, tl, |
| sizeof(*tl) + ext4_fc_tag_len(tl)); |
| break; |
| case EXT4_FC_TAG_TAIL: |
| state->fc_cur_tag++; |
| tail = (struct ext4_fc_tail *)ext4_fc_tag_val(tl); |
| state->fc_crc = jbd2_chksum(j, state->fc_crc, tl, |
| sizeof(*tl) + |
| offsetof(struct ext4_fc_tail, |
| fc_crc)); |
| jbd_debug(1, "tail tid %d, expected %d\n", |
| le32_to_cpu(tail->fc_tid), |
| expected_tid); |
| if (le32_to_cpu(tail->fc_tid) == expected_tid && |
| le32_to_cpu(tail->fc_crc) == state->fc_crc) { |
| state->fc_replay_num_tags = state->fc_cur_tag; |
| } else { |
| ret = state->fc_replay_num_tags ? |
| JBD2_FC_REPLAY_STOP : -EFSBADCRC; |
| } |
| state->fc_crc = 0; |
| break; |
| case EXT4_FC_TAG_HEAD: |
| head = (struct ext4_fc_head *)ext4_fc_tag_val(tl); |
| if (le32_to_cpu(head->fc_features) & |
| ~EXT4_FC_SUPPORTED_FEATURES) { |
| ret = -EOPNOTSUPP; |
| break; |
| } |
| if (le32_to_cpu(head->fc_tid) != expected_tid) { |
| ret = -EINVAL; |
| break; |
| } |
| state->fc_cur_tag++; |
| state->fc_crc = jbd2_chksum(j, state->fc_crc, tl, |
| sizeof(*tl) + ext4_fc_tag_len(tl)); |
| break; |
| default: |
| ret = state->fc_replay_num_tags ? |
| JBD2_FC_REPLAY_STOP : -ECANCELED; |
| } |
| if (ret < 0 || ret == JBD2_FC_REPLAY_STOP) |
| break; |
| } |
| |
| out_err: |
| return ret; |
| } |
| |
| static int __errcode_to_errno(errcode_t err, const char *func, int line) |
| { |
| if (err == 0) |
| return 0; |
| fprintf(stderr, "Error \"%s\" encountered in function %s at line %d\n", |
| error_message(err), func, line); |
| if (err <= 256) |
| return -err; |
| return -EFAULT; |
| } |
| |
| #define errcode_to_errno(err) __errcode_to_errno(err, __func__, __LINE__) |
| |
| #define ex_end(__ex) ((__ex)->e_lblk + (__ex)->e_len - 1) |
| #define ex_pend(__ex) ((__ex)->e_pblk + (__ex)->e_len - 1) |
| |
| static int make_room(struct extent_list *list, int i) |
| { |
| int ret; |
| |
| if (list->count == list->size) { |
| unsigned int new_size = (list->size + 341) * |
| sizeof(struct ext2fs_extent); |
| ret = errcode_to_errno(ext2fs_resize_mem(0, new_size, &list->extents)); |
| if (ret) |
| return ret; |
| list->size += 341; |
| } |
| |
| memmove(&list->extents[i + 1], &list->extents[i], |
| sizeof(list->extents[0]) * (list->count - i)); |
| list->count++; |
| return 0; |
| } |
| |
| static int ex_compar(const void *arg1, const void *arg2) |
| { |
| struct ext2fs_extent *ex1 = (struct ext2fs_extent *)arg1; |
| struct ext2fs_extent *ex2 = (struct ext2fs_extent *)arg2; |
| |
| if (ex1->e_lblk < ex2->e_lblk) |
| return -1; |
| if (ex1->e_lblk > ex2->e_lblk) |
| return 1; |
| return ex1->e_len - ex2->e_len; |
| } |
| |
| static int ex_len_compar(const void *arg1, const void *arg2) |
| { |
| struct ext2fs_extent *ex1 = (struct ext2fs_extent *)arg1; |
| struct ext2fs_extent *ex2 = (struct ext2fs_extent *)arg2; |
| |
| if (ex1->e_len < ex2->e_len) |
| return 1; |
| |
| if (ex1->e_lblk > ex2->e_lblk) |
| return -1; |
| |
| return 0; |
| } |
| |
| static void ex_sort_and_merge(struct extent_list *list) |
| { |
| int i, j; |
| |
| if (list->count < 2) |
| return; |
| |
| /* |
| * Reverse sort by length, that way we strip off all the 0 length |
| * extents |
| */ |
| qsort(list->extents, list->count, sizeof(struct ext2fs_extent), |
| ex_len_compar); |
| |
| for (i = 0; i < list->count; i++) { |
| if (list->extents[i].e_len == 0) { |
| list->count = i; |
| break; |
| } |
| } |
| |
| /* Now sort by logical offset */ |
| qsort(list->extents, list->count, sizeof(list->extents[0]), |
| ex_compar); |
| |
| /* Merge adjacent extents if they are logically and physically contiguous */ |
| i = 0; |
| while (i < list->count - 1) { |
| if (ex_end(&list->extents[i]) + 1 != list->extents[i + 1].e_lblk || |
| ex_pend(&list->extents[i]) + 1 != list->extents[i + 1].e_pblk || |
| (list->extents[i].e_flags & EXT2_EXTENT_FLAGS_UNINIT) != |
| (list->extents[i + 1].e_flags & EXT2_EXTENT_FLAGS_UNINIT)) { |
| i++; |
| continue; |
| } |
| |
| list->extents[i].e_len += list->extents[i + 1].e_len; |
| for (j = i + 1; j < list->count - 1; j++) |
| list->extents[j] = list->extents[j + 1]; |
| list->count--; |
| } |
| } |
| |
| /* must free blocks that are released */ |
| static int ext4_modify_extent_list(e2fsck_t ctx, struct extent_list *list, |
| struct ext2fs_extent *ex, int del) |
| { |
| int ret; |
| int i, offset; |
| struct ext2fs_extent add_ex = *ex; |
| |
| /* First let's create a hole from ex->e_lblk of length ex->e_len */ |
| for (i = 0; i < list->count; i++) { |
| if (ex_end(&list->extents[i]) < add_ex.e_lblk) |
| continue; |
| |
| /* Case 1: No overlap */ |
| if (list->extents[i].e_lblk > ex_end(&add_ex)) |
| break; |
| /* |
| * Unmark all the blocks in bb now. All the blocks get marked |
| * before we exit this function. |
| */ |
| ext2fs_unmark_block_bitmap_range2(ctx->fs->block_map, |
| list->extents[i].e_pblk, list->extents[i].e_len); |
| /* Case 2: Split */ |
| if (list->extents[i].e_lblk < add_ex.e_lblk && |
| ex_end(&list->extents[i]) > ex_end(&add_ex)) { |
| ret = make_room(list, i + 1); |
| if (ret) |
| return ret; |
| list->extents[i + 1] = list->extents[i]; |
| offset = ex_end(&add_ex) + 1 - list->extents[i].e_lblk; |
| list->extents[i + 1].e_lblk += offset; |
| list->extents[i + 1].e_pblk += offset; |
| list->extents[i + 1].e_len -= offset; |
| list->extents[i].e_len = |
| add_ex.e_lblk - list->extents[i].e_lblk; |
| break; |
| } |
| |
| /* Case 3: Exact overlap */ |
| if (add_ex.e_lblk <= list->extents[i].e_lblk && |
| ex_end(&list->extents[i]) <= ex_end(&add_ex)) { |
| |
| list->extents[i].e_len = 0; |
| continue; |
| } |
| |
| /* Case 4: Partial overlap */ |
| if (ex_end(&list->extents[i]) > ex_end(&add_ex)) { |
| offset = ex_end(&add_ex) + 1 - list->extents[i].e_lblk; |
| list->extents[i].e_lblk += offset; |
| list->extents[i].e_pblk += offset; |
| list->extents[i].e_len -= offset; |
| break; |
| } |
| |
| if (ex_end(&add_ex) >= ex_end(&list->extents[i])) |
| list->extents[i].e_len = |
| add_ex.e_lblk > list->extents[i].e_lblk ? |
| add_ex.e_lblk - list->extents[i].e_lblk : 0; |
| } |
| |
| if (add_ex.e_len && !del) { |
| make_room(list, list->count); |
| list->extents[list->count - 1] = add_ex; |
| } |
| |
| ex_sort_and_merge(list); |
| |
| /* Mark all occupied blocks allocated */ |
| for (i = 0; i < list->count; i++) |
| ext2fs_mark_block_bitmap_range2(ctx->fs->block_map, |
| list->extents[i].e_pblk, list->extents[i].e_len); |
| ext2fs_mark_bb_dirty(ctx->fs); |
| |
| return 0; |
| } |
| |
| static int ext4_add_extent_to_list(e2fsck_t ctx, struct extent_list *list, |
| struct ext2fs_extent *ex) |
| { |
| return ext4_modify_extent_list(ctx, list, ex, 0 /* add */); |
| } |
| |
| static int ext4_del_extent_from_list(e2fsck_t ctx, struct extent_list *list, |
| struct ext2fs_extent *ex) |
| { |
| return ext4_modify_extent_list(ctx, list, ex, 1 /* delete */); |
| } |
| |
| static int ext4_fc_read_extents(e2fsck_t ctx, int ino) |
| { |
| struct extent_list *extent_list = &ctx->fc_replay_state.fc_extent_list; |
| |
| if (extent_list->ino == ino) |
| return 0; |
| |
| extent_list->ino = ino; |
| return errcode_to_errno(e2fsck_read_extents(ctx, extent_list)); |
| } |
| |
| /* |
| * Flush extents in replay state on disk. @ino is the inode that is going |
| * to be processed next. So, we hold back flushing of the extent list |
| * if the next inode that's going to be processed is same as the one with |
| * cached extents in our replay state. That allows us to gather multiple extents |
| * for the inode so that we can flush all of them at once and it also saves us |
| * from continuously growing and shrinking the extent tree. |
| */ |
| static void ext4_fc_flush_extents(e2fsck_t ctx, int ino) |
| { |
| struct extent_list *extent_list = &ctx->fc_replay_state.fc_extent_list; |
| |
| if (extent_list->ino == ino || extent_list->ino == 0) |
| return; |
| e2fsck_rewrite_extent_tree(ctx, extent_list); |
| ext2fs_free_mem(&extent_list->extents); |
| memset(extent_list, 0, sizeof(*extent_list)); |
| } |
| |
| /* Helper struct for dentry replay routines */ |
| struct dentry_info_args { |
| int parent_ino, dname_len, ino, inode_len; |
| char *dname; |
| }; |
| |
| static inline void tl_to_darg(struct dentry_info_args *darg, |
| struct ext4_fc_tl *tl) |
| { |
| struct ext4_fc_dentry_info *fcd; |
| int tag = le16_to_cpu(tl->fc_tag); |
| |
| fcd = (struct ext4_fc_dentry_info *)ext4_fc_tag_val(tl); |
| |
| darg->parent_ino = le32_to_cpu(fcd->fc_parent_ino); |
| darg->ino = le32_to_cpu(fcd->fc_ino); |
| darg->dname = (char *) fcd->fc_dname; |
| darg->dname_len = ext4_fc_tag_len(tl) - |
| sizeof(struct ext4_fc_dentry_info); |
| darg->dname = malloc(darg->dname_len + 1); |
| memcpy(darg->dname, fcd->fc_dname, darg->dname_len); |
| darg->dname[darg->dname_len] = 0; |
| jbd_debug(1, "%s: %s, ino %d, parent %d\n", |
| tag == EXT4_FC_TAG_CREAT ? "create" : |
| (tag == EXT4_FC_TAG_LINK ? "link" : |
| (tag == EXT4_FC_TAG_UNLINK ? "unlink" : "error")), |
| darg->dname, darg->ino, darg->parent_ino); |
| } |
| |
| static int ext4_fc_handle_unlink(e2fsck_t ctx, struct ext4_fc_tl *tl) |
| { |
| struct dentry_info_args darg; |
| int ret; |
| |
| tl_to_darg(&darg, tl); |
| ext4_fc_flush_extents(ctx, darg.ino); |
| ret = errcode_to_errno( |
| ext2fs_unlink(ctx->fs, darg.parent_ino, |
| darg.dname, darg.ino, 0)); |
| /* It's okay if the above call fails */ |
| free(darg.dname); |
| return ret; |
| } |
| |
| static int ext4_fc_handle_link_and_create(e2fsck_t ctx, struct ext4_fc_tl *tl) |
| { |
| struct dentry_info_args darg; |
| ext2_filsys fs = ctx->fs; |
| struct ext2_inode_large inode_large; |
| int ret, filetype, mode; |
| |
| tl_to_darg(&darg, tl); |
| ext4_fc_flush_extents(ctx, 0); |
| ret = errcode_to_errno(ext2fs_read_inode(fs, darg.ino, |
| (struct ext2_inode *)&inode_large)); |
| if (ret) |
| goto out; |
| |
| mode = inode_large.i_mode; |
| |
| if (LINUX_S_ISREG(mode)) |
| filetype = EXT2_FT_REG_FILE; |
| else if (LINUX_S_ISDIR(mode)) |
| filetype = EXT2_FT_DIR; |
| else if (LINUX_S_ISCHR(mode)) |
| filetype = EXT2_FT_CHRDEV; |
| else if (LINUX_S_ISBLK(mode)) |
| filetype = EXT2_FT_BLKDEV; |
| else if (LINUX_S_ISLNK(mode)) |
| return EXT2_FT_SYMLINK; |
| else if (LINUX_S_ISFIFO(mode)) |
| filetype = EXT2_FT_FIFO; |
| else if (LINUX_S_ISSOCK(mode)) |
| filetype = EXT2_FT_SOCK; |
| else { |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| /* |
| * Forcefully unlink if the same name is present and ignore the error |
| * if any, since this dirent might not exist |
| */ |
| ext2fs_unlink(fs, darg.parent_ino, darg.dname, darg.ino, |
| EXT2FS_UNLINK_FORCE); |
| |
| ret = errcode_to_errno( |
| ext2fs_link(fs, darg.parent_ino, darg.dname, darg.ino, |
| filetype)); |
| out: |
| free(darg.dname); |
| return ret; |
| |
| } |
| |
| /* This function fixes the i_blocks field in the replayed indoe */ |
| static void ext4_fc_replay_fixup_iblocks(struct ext2_inode_large *ondisk_inode, |
| struct ext2_inode_large *fc_inode) |
| { |
| if (ondisk_inode->i_flags & EXT4_EXTENTS_FL) { |
| struct ext3_extent_header *eh; |
| |
| eh = (struct ext3_extent_header *)(&ondisk_inode->i_block[0]); |
| if (le16_to_cpu(eh->eh_magic) != EXT3_EXT_MAGIC) { |
| memset(eh, 0, sizeof(*eh)); |
| eh->eh_magic = cpu_to_le16(EXT3_EXT_MAGIC); |
| eh->eh_max = cpu_to_le16( |
| (sizeof(ondisk_inode->i_block) - |
| sizeof(struct ext3_extent_header)) / |
| sizeof(struct ext3_extent)); |
| } |
| } else if (ondisk_inode->i_flags & EXT4_INLINE_DATA_FL) { |
| memcpy(ondisk_inode->i_block, fc_inode->i_block, |
| sizeof(fc_inode->i_block)); |
| } |
| } |
| |
| static int ext4_fc_handle_inode(e2fsck_t ctx, struct ext4_fc_tl *tl) |
| { |
| int ino, inode_len = EXT2_GOOD_OLD_INODE_SIZE; |
| struct ext2_inode_large *inode = NULL, *fc_inode = NULL; |
| struct ext4_fc_inode *fc_inode_val; |
| errcode_t err; |
| blk64_t blks; |
| |
| fc_inode_val = (struct ext4_fc_inode *)ext4_fc_tag_val(tl); |
| ino = le32_to_cpu(fc_inode_val->fc_ino); |
| |
| if (EXT2_INODE_SIZE(ctx->fs->super) > EXT2_GOOD_OLD_INODE_SIZE) |
| inode_len += ext2fs_le16_to_cpu( |
| ((struct ext2_inode_large *)fc_inode_val->fc_raw_inode) |
| ->i_extra_isize); |
| err = ext2fs_get_mem(inode_len, &inode); |
| if (err) |
| goto out; |
| err = ext2fs_get_mem(inode_len, &fc_inode); |
| if (err) |
| goto out; |
| ext4_fc_flush_extents(ctx, ino); |
| |
| err = ext2fs_read_inode_full(ctx->fs, ino, (struct ext2_inode *)inode, |
| inode_len); |
| if (err) |
| goto out; |
| #ifdef WORDS_BIGENDIAN |
| ext2fs_swap_inode_full(ctx->fs, fc_inode, |
| (struct ext2_inode_large *)fc_inode_val->fc_raw_inode, |
| 0, sizeof(*inode)); |
| #else |
| memcpy(fc_inode, fc_inode_val->fc_raw_inode, inode_len); |
| #endif |
| memcpy(inode, fc_inode, offsetof(struct ext2_inode_large, i_block)); |
| memcpy(&inode->i_generation, &fc_inode->i_generation, |
| inode_len - offsetof(struct ext2_inode_large, i_generation)); |
| ext4_fc_replay_fixup_iblocks(inode, fc_inode); |
| err = ext2fs_count_blocks(ctx->fs, ino, EXT2_INODE(inode), &blks); |
| if (err) |
| goto out; |
| ext2fs_iblk_set(ctx->fs, EXT2_INODE(inode), blks); |
| ext2fs_inode_csum_set(ctx->fs, ino, inode); |
| |
| err = ext2fs_write_inode_full(ctx->fs, ino, (struct ext2_inode *)inode, |
| inode_len); |
| if (err) |
| goto out; |
| if (inode->i_links_count) |
| ext2fs_mark_inode_bitmap2(ctx->fs->inode_map, ino); |
| else |
| ext2fs_unmark_inode_bitmap2(ctx->fs->inode_map, ino); |
| ext2fs_mark_ib_dirty(ctx->fs); |
| |
| out: |
| ext2fs_free_mem(&inode); |
| ext2fs_free_mem(&fc_inode); |
| return errcode_to_errno(err); |
| } |
| |
| /* |
| * Handle add extent replay tag. |
| */ |
| static int ext4_fc_handle_add_extent(e2fsck_t ctx, struct ext4_fc_tl *tl) |
| { |
| struct ext2fs_extent extent; |
| struct ext4_fc_add_range *add_range; |
| int ret = 0, ino; |
| |
| add_range = (struct ext4_fc_add_range *)ext4_fc_tag_val(tl); |
| ino = le32_to_cpu(add_range->fc_ino); |
| ext4_fc_flush_extents(ctx, ino); |
| |
| ret = ext4_fc_read_extents(ctx, ino); |
| if (ret) |
| return ret; |
| memset(&extent, 0, sizeof(extent)); |
| ret = errcode_to_errno(ext2fs_decode_extent( |
| &extent, (void *)(add_range->fc_ex), |
| sizeof(add_range->fc_ex))); |
| if (ret) |
| return ret; |
| return ext4_add_extent_to_list(ctx, |
| &ctx->fc_replay_state.fc_extent_list, &extent); |
| } |
| |
| /* |
| * Handle delete logical range replay tag. |
| */ |
| static int ext4_fc_handle_del_range(e2fsck_t ctx, struct ext4_fc_tl *tl) |
| { |
| struct ext2fs_extent extent; |
| struct ext4_fc_del_range *del_range; |
| int ret, ino; |
| |
| del_range = (struct ext4_fc_del_range *)ext4_fc_tag_val(tl); |
| ino = le32_to_cpu(del_range->fc_ino); |
| ext4_fc_flush_extents(ctx, ino); |
| |
| memset(&extent, 0, sizeof(extent)); |
| extent.e_lblk = ext2fs_le32_to_cpu(del_range->fc_lblk); |
| extent.e_len = ext2fs_le32_to_cpu(del_range->fc_len); |
| ret = ext4_fc_read_extents(ctx, ino); |
| if (ret) |
| return ret; |
| return ext4_del_extent_from_list(ctx, |
| &ctx->fc_replay_state.fc_extent_list, &extent); |
| } |
| |
| /* |
| * Main recovery path entry point. This function returns JBD2_FC_REPLAY_CONTINUE |
| * to indicate that it is expecting more fast commit blocks. It returns |
| * JBD2_FC_REPLAY_STOP to indicate that replay is done. |
| */ |
| static int ext4_fc_replay(journal_t *journal, struct buffer_head *bh, |
| enum passtype pass, int off, tid_t expected_tid) |
| { |
| e2fsck_t ctx = journal->j_fs_dev->k_ctx; |
| struct e2fsck_fc_replay_state *state = &ctx->fc_replay_state; |
| int ret = JBD2_FC_REPLAY_CONTINUE; |
| struct ext4_fc_tl *tl; |
| __u8 *start, *end; |
| |
| if (pass == PASS_SCAN) { |
| state->fc_current_pass = PASS_SCAN; |
| return ext4_fc_replay_scan(journal, bh, off, expected_tid); |
| } |
| |
| if (state->fc_replay_num_tags == 0) |
| goto replay_done; |
| |
| if (state->fc_current_pass != pass) { |
| /* Starting replay phase */ |
| state->fc_current_pass = pass; |
| /* We will reset checksums */ |
| ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS; |
| ret = errcode_to_errno(ext2fs_read_bitmaps(ctx->fs)); |
| if (ret) { |
| jbd_debug(1, "Error %d while reading bitmaps\n", ret); |
| return ret; |
| } |
| state->fc_super_state = ctx->fs->super->s_state; |
| /* |
| * Mark the file system to indicate it contains errors. That's |
| * because the updates performed by fast commit replay code are |
| * not atomic and may result in incosistent file system if it |
| * crashes before the replay is complete. |
| */ |
| ctx->fs->super->s_state |= EXT2_ERROR_FS; |
| ctx->fs->super->s_state |= EXT4_FC_REPLAY; |
| ext2fs_mark_super_dirty(ctx->fs); |
| ext2fs_flush(ctx->fs); |
| } |
| |
| start = (__u8 *)bh->b_data; |
| end = (__u8 *)bh->b_data + journal->j_blocksize - 1; |
| |
| fc_for_each_tl(start, end, tl) { |
| if (state->fc_replay_num_tags == 0) |
| goto replay_done; |
| jbd_debug(3, "Replay phase processing %s tag\n", |
| tag2str(le16_to_cpu(tl->fc_tag))); |
| state->fc_replay_num_tags--; |
| switch (le16_to_cpu(tl->fc_tag)) { |
| case EXT4_FC_TAG_CREAT: |
| case EXT4_FC_TAG_LINK: |
| ret = ext4_fc_handle_link_and_create(ctx, tl); |
| break; |
| case EXT4_FC_TAG_UNLINK: |
| ret = ext4_fc_handle_unlink(ctx, tl); |
| break; |
| case EXT4_FC_TAG_ADD_RANGE: |
| ret = ext4_fc_handle_add_extent(ctx, tl); |
| break; |
| case EXT4_FC_TAG_DEL_RANGE: |
| ret = ext4_fc_handle_del_range(ctx, tl); |
| break; |
| case EXT4_FC_TAG_INODE: |
| ret = ext4_fc_handle_inode(ctx, tl); |
| break; |
| case EXT4_FC_TAG_TAIL: |
| ext4_fc_flush_extents(ctx, 0); |
| case EXT4_FC_TAG_PAD: |
| case EXT4_FC_TAG_HEAD: |
| break; |
| default: |
| ret = -ECANCELED; |
| break; |
| } |
| if (ret < 0) |
| break; |
| ret = JBD2_FC_REPLAY_CONTINUE; |
| } |
| return ret; |
| replay_done: |
| jbd_debug(1, "End of fast commit replay\n"); |
| if (state->fc_current_pass != pass) |
| return JBD2_FC_REPLAY_STOP; |
| |
| ext2fs_calculate_summary_stats(ctx->fs, 0 /* update bg also */); |
| ext2fs_write_block_bitmap(ctx->fs); |
| ext2fs_write_inode_bitmap(ctx->fs); |
| ext2fs_mark_super_dirty(ctx->fs); |
| ext2fs_set_gdt_csum(ctx->fs); |
| ctx->fs->super->s_state = state->fc_super_state; |
| ext2fs_flush(ctx->fs); |
| |
| return JBD2_FC_REPLAY_STOP; |
| } |
| |
| static errcode_t e2fsck_get_journal(e2fsck_t ctx, journal_t **ret_journal) |
| { |
| struct process_block_struct pb; |
| struct ext2_super_block *sb = ctx->fs->super; |
| struct ext2_super_block jsuper; |
| struct problem_context pctx; |
| struct buffer_head *bh; |
| struct inode *j_inode = NULL; |
| struct kdev_s *dev_fs = NULL, *dev_journal; |
| const char *journal_name = 0; |
| journal_t *journal = NULL; |
| errcode_t retval = 0; |
| io_manager io_ptr = 0; |
| unsigned long long start = 0; |
| int ret; |
| int ext_journal = 0; |
| int tried_backup_jnl = 0; |
| |
| clear_problem_context(&pctx); |
| |
| journal = e2fsck_allocate_memory(ctx, sizeof(journal_t), "journal"); |
| if (!journal) { |
| return EXT2_ET_NO_MEMORY; |
| } |
| |
| dev_fs = e2fsck_allocate_memory(ctx, 2*sizeof(struct kdev_s), "kdev"); |
| if (!dev_fs) { |
| retval = EXT2_ET_NO_MEMORY; |
| goto errout; |
| } |
| dev_journal = dev_fs+1; |
| |
| dev_fs->k_ctx = dev_journal->k_ctx = ctx; |
| dev_fs->k_dev = K_DEV_FS; |
| dev_journal->k_dev = K_DEV_JOURNAL; |
| |
| journal->j_dev = dev_journal; |
| journal->j_fs_dev = dev_fs; |
| journal->j_inode = NULL; |
| journal->j_blocksize = ctx->fs->blocksize; |
| |
| if (uuid_is_null(sb->s_journal_uuid)) { |
| if (!sb->s_journal_inum) { |
| retval = EXT2_ET_BAD_INODE_NUM; |
| goto errout; |
| } |
| j_inode = e2fsck_allocate_memory(ctx, sizeof(*j_inode), |
| "journal inode"); |
| if (!j_inode) { |
| retval = EXT2_ET_NO_MEMORY; |
| goto errout; |
| } |
| |
| j_inode->i_ctx = ctx; |
| j_inode->i_ino = sb->s_journal_inum; |
| |
| if ((retval = ext2fs_read_inode(ctx->fs, |
| sb->s_journal_inum, |
| &j_inode->i_ext2))) { |
| try_backup_journal: |
| if (sb->s_jnl_backup_type != EXT3_JNL_BACKUP_BLOCKS || |
| tried_backup_jnl) |
| goto errout; |
| memset(&j_inode->i_ext2, 0, sizeof(struct ext2_inode)); |
| memcpy(&j_inode->i_ext2.i_block[0], sb->s_jnl_blocks, |
| EXT2_N_BLOCKS*4); |
| j_inode->i_ext2.i_size_high = sb->s_jnl_blocks[15]; |
| j_inode->i_ext2.i_size = sb->s_jnl_blocks[16]; |
| j_inode->i_ext2.i_links_count = 1; |
| j_inode->i_ext2.i_mode = LINUX_S_IFREG | 0600; |
| e2fsck_use_inode_shortcuts(ctx, 1); |
| ctx->stashed_ino = j_inode->i_ino; |
| ctx->stashed_inode = &j_inode->i_ext2; |
| tried_backup_jnl++; |
| } |
| if (!j_inode->i_ext2.i_links_count || |
| !LINUX_S_ISREG(j_inode->i_ext2.i_mode)) { |
| retval = EXT2_ET_NO_JOURNAL; |
| goto try_backup_journal; |
| } |
| if (EXT2_I_SIZE(&j_inode->i_ext2) / journal->j_blocksize < |
| JBD2_MIN_JOURNAL_BLOCKS) { |
| retval = EXT2_ET_JOURNAL_TOO_SMALL; |
| goto try_backup_journal; |
| } |
| pb.last_block = -1; |
| retval = ext2fs_block_iterate3(ctx->fs, j_inode->i_ino, |
| BLOCK_FLAG_HOLE, 0, |
| process_journal_block, &pb); |
| if ((pb.last_block + 1) * ctx->fs->blocksize < |
| (int) EXT2_I_SIZE(&j_inode->i_ext2)) { |
| retval = EXT2_ET_JOURNAL_TOO_SMALL; |
| goto try_backup_journal; |
| } |
| if (tried_backup_jnl && !(ctx->options & E2F_OPT_READONLY)) { |
| retval = ext2fs_write_inode(ctx->fs, sb->s_journal_inum, |
| &j_inode->i_ext2); |
| if (retval) |
| goto errout; |
| } |
| |
| journal->j_total_len = EXT2_I_SIZE(&j_inode->i_ext2) / |
| journal->j_blocksize; |
| |
| #ifdef USE_INODE_IO |
| retval = ext2fs_inode_io_intern2(ctx->fs, sb->s_journal_inum, |
| &j_inode->i_ext2, |
| &journal_name); |
| if (retval) |
| goto errout; |
| |
| io_ptr = inode_io_manager; |
| #else |
| journal->j_inode = j_inode; |
| ctx->journal_io = ctx->fs->io; |
| if ((ret = jbd2_journal_bmap(journal, 0, &start)) != 0) { |
| retval = (errcode_t) (-1 * ret); |
| goto errout; |
| } |
| #endif |
| } else { |
| ext_journal = 1; |
| if (!ctx->journal_name) { |
| char uuid[37]; |
| |
| uuid_unparse(sb->s_journal_uuid, uuid); |
| ctx->journal_name = blkid_get_devname(ctx->blkid, |
| "UUID", uuid); |
| if (!ctx->journal_name) |
| ctx->journal_name = blkid_devno_to_devname(sb->s_journal_dev); |
| } |
| journal_name = ctx->journal_name; |
| |
| if (!journal_name) { |
| fix_problem(ctx, PR_0_CANT_FIND_JOURNAL, &pctx); |
| retval = EXT2_ET_LOAD_EXT_JOURNAL; |
| goto errout; |
| } |
| |
| jfs_debug(1, "Using journal file %s\n", journal_name); |
| io_ptr = unix_io_manager; |
| } |
| |
| #if 0 |
| test_io_backing_manager = io_ptr; |
| io_ptr = test_io_manager; |
| #endif |
| #ifndef USE_INODE_IO |
| if (ext_journal) |
| #endif |
| { |
| int flags = IO_FLAG_RW; |
| if (!(ctx->mount_flags & EXT2_MF_ISROOT && |
| ctx->mount_flags & EXT2_MF_READONLY)) |
| flags |= IO_FLAG_EXCLUSIVE; |
| if ((ctx->mount_flags & EXT2_MF_READONLY) && |
| (ctx->options & E2F_OPT_FORCE)) |
| flags &= ~IO_FLAG_EXCLUSIVE; |
| |
| |
| retval = io_ptr->open(journal_name, flags, |
| &ctx->journal_io); |
| } |
| if (retval) |
| goto errout; |
| |
| io_channel_set_blksize(ctx->journal_io, ctx->fs->blocksize); |
| |
| if (ext_journal) { |
| blk64_t maxlen; |
| |
| start = ext2fs_journal_sb_start(ctx->fs->blocksize) - 1; |
| bh = getblk(dev_journal, start, ctx->fs->blocksize); |
| if (!bh) { |
| retval = EXT2_ET_NO_MEMORY; |
| goto errout; |
| } |
| ll_rw_block(REQ_OP_READ, 0, 1, &bh); |
| if ((retval = bh->b_err) != 0) { |
| brelse(bh); |
| goto errout; |
| } |
| memcpy(&jsuper, start ? bh->b_data : bh->b_data + SUPERBLOCK_OFFSET, |
| sizeof(jsuper)); |
| #ifdef WORDS_BIGENDIAN |
| if (jsuper.s_magic == ext2fs_swab16(EXT2_SUPER_MAGIC)) |
| ext2fs_swap_super(&jsuper); |
| #endif |
| if (jsuper.s_magic != EXT2_SUPER_MAGIC || |
| !ext2fs_has_feature_journal_dev(&jsuper)) { |
| fix_problem(ctx, PR_0_EXT_JOURNAL_BAD_SUPER, &pctx); |
| retval = EXT2_ET_LOAD_EXT_JOURNAL; |
| brelse(bh); |
| goto errout; |
| } |
| /* Make sure the journal UUID is correct */ |
| if (memcmp(jsuper.s_uuid, ctx->fs->super->s_journal_uuid, |
| sizeof(jsuper.s_uuid))) { |
| fix_problem(ctx, PR_0_JOURNAL_BAD_UUID, &pctx); |
| retval = EXT2_ET_LOAD_EXT_JOURNAL; |
| brelse(bh); |
| goto errout; |
| } |
| |
| /* Check the superblock checksum */ |
| if (ext2fs_has_feature_metadata_csum(&jsuper)) { |
| struct struct_ext2_filsys fsx; |
| struct ext2_super_block superx; |
| void *p; |
| |
| p = start ? bh->b_data : bh->b_data + SUPERBLOCK_OFFSET; |
| memcpy(&fsx, ctx->fs, sizeof(fsx)); |
| memcpy(&superx, ctx->fs->super, sizeof(superx)); |
| fsx.super = &superx; |
| ext2fs_set_feature_metadata_csum(fsx.super); |
| if (!ext2fs_superblock_csum_verify(&fsx, p) && |
| fix_problem(ctx, PR_0_EXT_JOURNAL_SUPER_CSUM_INVALID, |
| &pctx)) { |
| ext2fs_superblock_csum_set(&fsx, p); |
| mark_buffer_dirty(bh); |
| } |
| } |
| brelse(bh); |
| |
| maxlen = ext2fs_blocks_count(&jsuper); |
| journal->j_total_len = (maxlen < 1ULL << 32) ? maxlen : (1ULL << 32) - 1; |
| start++; |
| } |
| |
| if (!(bh = getblk(dev_journal, start, journal->j_blocksize))) { |
| retval = EXT2_ET_NO_MEMORY; |
| goto errout; |
| } |
| |
| journal->j_sb_buffer = bh; |
| journal->j_superblock = (journal_superblock_t *)bh->b_data; |
| if (ext2fs_has_feature_fast_commit(ctx->fs->super)) |
| journal->j_fc_replay_callback = ext4_fc_replay; |
| else |
| journal->j_fc_replay_callback = NULL; |
| |
| #ifdef USE_INODE_IO |
| if (j_inode) |
| ext2fs_free_mem(&j_inode); |
| #endif |
| |
| *ret_journal = journal; |
| e2fsck_use_inode_shortcuts(ctx, 0); |
| return 0; |
| |
| errout: |
| e2fsck_use_inode_shortcuts(ctx, 0); |
| if (dev_fs) |
| ext2fs_free_mem(&dev_fs); |
| if (j_inode) |
| ext2fs_free_mem(&j_inode); |
| if (journal) |
| ext2fs_free_mem(&journal); |
| return retval; |
| } |
| |
| static errcode_t e2fsck_journal_fix_bad_inode(e2fsck_t ctx, |
| struct problem_context *pctx) |
| { |
| struct ext2_super_block *sb = ctx->fs->super; |
| int recover = ext2fs_has_feature_journal_needs_recovery(ctx->fs->super); |
| int has_journal = ext2fs_has_feature_journal(ctx->fs->super); |
| |
| if (has_journal || sb->s_journal_inum) { |
| /* The journal inode is bogus, remove and force full fsck */ |
| pctx->ino = sb->s_journal_inum; |
| if (fix_problem(ctx, PR_0_JOURNAL_BAD_INODE, pctx)) { |
| if (has_journal && sb->s_journal_inum) |
| printf("*** journal has been deleted ***\n\n"); |
| ext2fs_clear_feature_journal(sb); |
| sb->s_journal_inum = 0; |
| memset(sb->s_jnl_blocks, 0, sizeof(sb->s_jnl_blocks)); |
| ctx->flags |= E2F_FLAG_JOURNAL_INODE; |
| ctx->fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY; |
| e2fsck_clear_recover(ctx, 1); |
| return 0; |
| } |
| return EXT2_ET_CORRUPT_JOURNAL_SB; |
| } else if (recover) { |
| if (fix_problem(ctx, PR_0_JOURNAL_RECOVER_SET, pctx)) { |
| e2fsck_clear_recover(ctx, 1); |
| return 0; |
| } |
| return EXT2_ET_UNSUPP_FEATURE; |
| } |
| return 0; |
| } |
| |
| #define V1_SB_SIZE 0x0024 |
| static void clear_v2_journal_fields(journal_t *journal) |
| { |
| e2fsck_t ctx = journal->j_dev->k_ctx; |
| struct problem_context pctx; |
| |
| clear_problem_context(&pctx); |
| |
| if (!fix_problem(ctx, PR_0_CLEAR_V2_JOURNAL, &pctx)) |
| return; |
| |
| ctx->flags |= E2F_FLAG_PROBLEMS_FIXED; |
| memset(((char *) journal->j_superblock) + V1_SB_SIZE, 0, |
| ctx->fs->blocksize-V1_SB_SIZE); |
| mark_buffer_dirty(journal->j_sb_buffer); |
| } |
| |
| |
| static errcode_t e2fsck_journal_load(journal_t *journal) |
| { |
| e2fsck_t ctx = journal->j_dev->k_ctx; |
| journal_superblock_t *jsb; |
| struct buffer_head *jbh = journal->j_sb_buffer; |
| struct problem_context pctx; |
| |
| clear_problem_context(&pctx); |
| |
| ll_rw_block(REQ_OP_READ, 0, 1, &jbh); |
| if (jbh->b_err) { |
| com_err(ctx->device_name, jbh->b_err, "%s", |
| _("reading journal superblock\n")); |
| return jbh->b_err; |
| } |
| |
| jsb = journal->j_superblock; |
| /* If we don't even have JBD2_MAGIC, we probably have a wrong inode */ |
| if (jsb->s_header.h_magic != htonl(JBD2_MAGIC_NUMBER)) |
| return e2fsck_journal_fix_bad_inode(ctx, &pctx); |
| |
| switch (ntohl(jsb->s_header.h_blocktype)) { |
| case JBD2_SUPERBLOCK_V1: |
| journal->j_format_version = 1; |
| if (jsb->s_feature_compat || |
| jsb->s_feature_incompat || |
| jsb->s_feature_ro_compat || |
| jsb->s_nr_users) |
| clear_v2_journal_fields(journal); |
| break; |
| |
| case JBD2_SUPERBLOCK_V2: |
| journal->j_format_version = 2; |
| if (ntohl(jsb->s_nr_users) > 1 && |
| uuid_is_null(ctx->fs->super->s_journal_uuid)) |
| clear_v2_journal_fields(journal); |
| if (ntohl(jsb->s_nr_users) > 1) { |
| fix_problem(ctx, PR_0_JOURNAL_UNSUPP_MULTIFS, &pctx); |
| return EXT2_ET_JOURNAL_UNSUPP_VERSION; |
| } |
| break; |
| |
| /* |
| * These should never appear in a journal super block, so if |
| * they do, the journal is badly corrupted. |
| */ |
| case JBD2_DESCRIPTOR_BLOCK: |
| case JBD2_COMMIT_BLOCK: |
| case JBD2_REVOKE_BLOCK: |
| return EXT2_ET_CORRUPT_JOURNAL_SB; |
| |
| /* If we don't understand the superblock major type, but there |
| * is a magic number, then it is likely to be a new format we |
| * just don't understand, so leave it alone. */ |
| default: |
| return EXT2_ET_JOURNAL_UNSUPP_VERSION; |
| } |
| |
| if (JBD2_HAS_INCOMPAT_FEATURE(journal, ~JBD2_KNOWN_INCOMPAT_FEATURES)) |
| return EXT2_ET_UNSUPP_FEATURE; |
| |
| if (JBD2_HAS_RO_COMPAT_FEATURE(journal, ~JBD2_KNOWN_ROCOMPAT_FEATURES)) |
| return EXT2_ET_RO_UNSUPP_FEATURE; |
| |
| /* Checksum v1-3 are mutually exclusive features. */ |
| if (jbd2_has_feature_csum2(journal) && jbd2_has_feature_csum3(journal)) |
| return EXT2_ET_CORRUPT_JOURNAL_SB; |
| |
| if (jbd2_journal_has_csum_v2or3(journal) && |
| jbd2_has_feature_checksum(journal)) |
| return EXT2_ET_CORRUPT_JOURNAL_SB; |
| |
| if (!e2fsck_journal_verify_csum_type(journal, jsb) || |
| !e2fsck_journal_sb_csum_verify(journal, jsb)) |
| return EXT2_ET_CORRUPT_JOURNAL_SB; |
| |
| if (jbd2_journal_has_csum_v2or3(journal)) |
| journal->j_csum_seed = jbd2_chksum(journal, ~0, jsb->s_uuid, |
| sizeof(jsb->s_uuid)); |
| |
| /* We have now checked whether we know enough about the journal |
| * format to be able to proceed safely, so any other checks that |
| * fail we should attempt to recover from. */ |
| if (jsb->s_blocksize != htonl(journal->j_blocksize)) { |
| com_err(ctx->program_name, EXT2_ET_CORRUPT_JOURNAL_SB, |
| _("%s: no valid journal superblock found\n"), |
| ctx->device_name); |
| return EXT2_ET_CORRUPT_JOURNAL_SB; |
| } |
| |
| if (ntohl(jsb->s_maxlen) < journal->j_total_len) |
| journal->j_total_len = ntohl(jsb->s_maxlen); |
| else if (ntohl(jsb->s_maxlen) > journal->j_total_len) { |
| com_err(ctx->program_name, EXT2_ET_CORRUPT_JOURNAL_SB, |
| _("%s: journal too short\n"), |
| ctx->device_name); |
| return EXT2_ET_CORRUPT_JOURNAL_SB; |
| } |
| |
| journal->j_tail_sequence = ntohl(jsb->s_sequence); |
| journal->j_transaction_sequence = journal->j_tail_sequence; |
| journal->j_tail = ntohl(jsb->s_start); |
| journal->j_first = ntohl(jsb->s_first); |
| if (jbd2_has_feature_fast_commit(journal)) { |
| if (ntohl(jsb->s_maxlen) - jbd2_journal_get_num_fc_blks(jsb) |
| < JBD2_MIN_JOURNAL_BLOCKS) { |
| com_err(ctx->program_name, EXT2_ET_CORRUPT_JOURNAL_SB, |
| _("%s: incorrect fast commit blocks\n"), |
| ctx->device_name); |
| return EXT2_ET_CORRUPT_JOURNAL_SB; |
| } |
| journal->j_fc_last = ntohl(jsb->s_maxlen); |
| journal->j_last = journal->j_fc_last - |
| jbd2_journal_get_num_fc_blks(jsb); |
| journal->j_fc_first = journal->j_last + 1; |
| } else { |
| journal->j_last = ntohl(jsb->s_maxlen); |
| } |
| |
| return 0; |
| } |
| |
| static void e2fsck_journal_reset_super(e2fsck_t ctx, journal_superblock_t *jsb, |
| journal_t *journal) |
| { |
| char *p; |
| union { |
| uuid_t uuid; |
| __u32 val[4]; |
| } u; |
| __u32 new_seq = 0; |
| int i; |
| |
| /* Leave a valid existing V1 superblock signature alone. |
| * Anything unrecognisable we overwrite with a new V2 |
| * signature. */ |
| |
| if (jsb->s_header.h_magic != htonl(JBD2_MAGIC_NUMBER) || |
| jsb->s_header.h_blocktype != htonl(JBD2_SUPERBLOCK_V1)) { |
| jsb->s_header.h_magic = htonl(JBD2_MAGIC_NUMBER); |
| jsb->s_header.h_blocktype = htonl(JBD2_SUPERBLOCK_V2); |
| } |
| |
| /* Zero out everything else beyond the superblock header */ |
| |
| p = ((char *) jsb) + sizeof(journal_header_t); |
| memset (p, 0, ctx->fs->blocksize-sizeof(journal_header_t)); |
| |
| jsb->s_blocksize = htonl(ctx->fs->blocksize); |
| jsb->s_maxlen = htonl(journal->j_total_len); |
| jsb->s_first = htonl(1); |
| |
| /* Initialize the journal sequence number so that there is "no" |
| * chance we will find old "valid" transactions in the journal. |
| * This avoids the need to zero the whole journal (slow to do, |
| * and risky when we are just recovering the filesystem). |
| */ |
| uuid_generate(u.uuid); |
| for (i = 0; i < 4; i ++) |
| new_seq ^= u.val[i]; |
| jsb->s_sequence = htonl(new_seq); |
| e2fsck_journal_sb_csum_set(journal, jsb); |
| |
| mark_buffer_dirty(journal->j_sb_buffer); |
| ll_rw_block(REQ_OP_WRITE, 0, 1, &journal->j_sb_buffer); |
| } |
| |
| static errcode_t e2fsck_journal_fix_corrupt_super(e2fsck_t ctx, |
| journal_t *journal, |
| struct problem_context *pctx) |
| { |
| struct ext2_super_block *sb = ctx->fs->super; |
| int recover = ext2fs_has_feature_journal_needs_recovery(ctx->fs->super); |
| |
| if (ext2fs_has_feature_journal(sb)) { |
| if (fix_problem(ctx, PR_0_JOURNAL_BAD_SUPER, pctx)) { |
| e2fsck_journal_reset_super(ctx, journal->j_superblock, |
| journal); |
| journal->j_transaction_sequence = 1; |
| e2fsck_clear_recover(ctx, recover); |
| return 0; |
| } |
| return EXT2_ET_CORRUPT_JOURNAL_SB; |
| } else if (e2fsck_journal_fix_bad_inode(ctx, pctx)) |
| return EXT2_ET_CORRUPT_JOURNAL_SB; |
| |
| return 0; |
| } |
| |
| static void e2fsck_journal_release(e2fsck_t ctx, journal_t *journal, |
| int reset, int drop) |
| { |
| journal_superblock_t *jsb; |
| |
| if (drop) |
| mark_buffer_clean(journal->j_sb_buffer); |
| else if (!(ctx->options & E2F_OPT_READONLY)) { |
| jsb = journal->j_superblock; |
| jsb->s_sequence = htonl(journal->j_tail_sequence); |
| if (reset) |
| jsb->s_start = 0; /* this marks the journal as empty */ |
| e2fsck_journal_sb_csum_set(journal, jsb); |
| mark_buffer_dirty(journal->j_sb_buffer); |
| } |
| brelse(journal->j_sb_buffer); |
| |
| if (ctx->journal_io) { |
| if (ctx->fs && ctx->fs->io != ctx->journal_io) |
| io_channel_close(ctx->journal_io); |
| ctx->journal_io = 0; |
| } |
| |
| #ifndef USE_INODE_IO |
| if (journal->j_inode) |
| ext2fs_free_mem(&journal->j_inode); |
| #endif |
| if (journal->j_fs_dev) |
| ext2fs_free_mem(&journal->j_fs_dev); |
| ext2fs_free_mem(&journal); |
| } |
| |
| /* |
| * This function makes sure that the superblock fields regarding the |
| * journal are consistent. |
| */ |
| errcode_t e2fsck_check_ext3_journal(e2fsck_t ctx) |
| { |
| struct ext2_super_block *sb = ctx->fs->super; |
| journal_t *journal; |
| int recover = ext2fs_has_feature_journal_needs_recovery(ctx->fs->super); |
| struct problem_context pctx; |
| problem_t problem; |
| int reset = 0, force_fsck = 0; |
| errcode_t retval; |
| |
| /* If we don't have any journal features, don't do anything more */ |
| if (!ext2fs_has_feature_journal(sb) && |
| !recover && sb->s_journal_inum == 0 && sb->s_journal_dev == 0 && |
| uuid_is_null(sb->s_journal_uuid)) |
| return 0; |
| |
| clear_problem_context(&pctx); |
| pctx.num = sb->s_journal_inum; |
| |
| retval = e2fsck_get_journal(ctx, &journal); |
| if (retval) { |
| if ((retval == EXT2_ET_BAD_INODE_NUM) || |
| (retval == EXT2_ET_BAD_BLOCK_NUM) || |
| (retval == EXT2_ET_JOURNAL_TOO_SMALL) || |
| (retval == EXT2_ET_NO_JOURNAL)) |
| return e2fsck_journal_fix_bad_inode(ctx, &pctx); |
| return retval; |
| } |
| |
| retval = e2fsck_journal_load(journal); |
| if (retval) { |
| if ((retval == EXT2_ET_CORRUPT_JOURNAL_SB) || |
| ((retval == EXT2_ET_UNSUPP_FEATURE) && |
| (!fix_problem(ctx, PR_0_JOURNAL_UNSUPP_INCOMPAT, |
| &pctx))) || |
| ((retval == EXT2_ET_RO_UNSUPP_FEATURE) && |
| (!fix_problem(ctx, PR_0_JOURNAL_UNSUPP_ROCOMPAT, |
| &pctx))) || |
| ((retval == EXT2_ET_JOURNAL_UNSUPP_VERSION) && |
| (!fix_problem(ctx, PR_0_JOURNAL_UNSUPP_VERSION, &pctx)))) |
| retval = e2fsck_journal_fix_corrupt_super(ctx, journal, |
| &pctx); |
| e2fsck_journal_release(ctx, journal, 0, 1); |
| return retval; |
| } |
| |
| /* |
| * We want to make the flags consistent here. We will not leave with |
| * needs_recovery set but has_journal clear. We can't get in a loop |
| * with -y, -n, or -p, only if a user isn't making up their mind. |
| */ |
| no_has_journal: |
| if (!ext2fs_has_feature_journal(sb)) { |
| recover = ext2fs_has_feature_journal_needs_recovery(sb); |
| if (fix_problem(ctx, PR_0_JOURNAL_HAS_JOURNAL, &pctx)) { |
| if (recover && |
| !fix_problem(ctx, PR_0_JOURNAL_RECOVER_SET, &pctx)) |
| goto no_has_journal; |
| /* |
| * Need a full fsck if we are releasing a |
| * journal stored on a reserved inode. |
| */ |
| force_fsck = recover || |
| (sb->s_journal_inum < EXT2_FIRST_INODE(sb)); |
| /* Clear all of the journal fields */ |
| sb->s_journal_inum = 0; |
| sb->s_journal_dev = 0; |
| memset(sb->s_journal_uuid, 0, |
| sizeof(sb->s_journal_uuid)); |
| e2fsck_clear_recover(ctx, force_fsck); |
| } else if (!(ctx->options & E2F_OPT_READONLY)) { |
| ext2fs_set_feature_journal(sb); |
| ctx->fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY; |
| ext2fs_mark_super_dirty(ctx->fs); |
| } |
| } |
| |
| if (ext2fs_has_feature_journal(sb) && |
| !ext2fs_has_feature_journal_needs_recovery(sb) && |
| journal->j_superblock->s_start != 0) { |
| /* Print status information */ |
| fix_problem(ctx, PR_0_JOURNAL_RECOVERY_CLEAR, &pctx); |
| if (ctx->superblock) |
| problem = PR_0_JOURNAL_RUN_DEFAULT; |
| else |
| problem = PR_0_JOURNAL_RUN; |
| if (fix_problem(ctx, problem, &pctx)) { |
| ctx->options |= E2F_OPT_FORCE; |
| ext2fs_set_feature_journal_needs_recovery(sb); |
| ext2fs_mark_super_dirty(ctx->fs); |
| } else if (fix_problem(ctx, |
| PR_0_JOURNAL_RESET_JOURNAL, &pctx)) { |
| reset = 1; |
| sb->s_state &= ~EXT2_VALID_FS; |
| ext2fs_mark_super_dirty(ctx->fs); |
| } |
| /* |
| * If the user answers no to the above question, we |
| * ignore the fact that journal apparently has data; |
| * accidentally replaying over valid data would be far |
| * worse than skipping a questionable recovery. |
| * |
| * XXX should we abort with a fatal error here? What |
| * will the ext3 kernel code do if a filesystem with |
| * !NEEDS_RECOVERY but with a non-zero |
| * journal->j_superblock->s_start is mounted? |
| */ |
| } |
| |
| /* |
| * If we don't need to do replay the journal, check to see if |
| * the journal's errno is set; if so, we need to mark the file |
| * system as being corrupt and clear the journal's s_errno. |
| */ |
| if (!ext2fs_has_feature_journal_needs_recovery(sb) && |
| journal->j_superblock->s_errno) { |
| ctx->fs->super->s_state |= EXT2_ERROR_FS; |
| ext2fs_mark_super_dirty(ctx->fs); |
| journal->j_superblock->s_errno = 0; |
| e2fsck_journal_sb_csum_set(journal, journal->j_superblock); |
| mark_buffer_dirty(journal->j_sb_buffer); |
| } |
| |
| e2fsck_journal_release(ctx, journal, reset, 0); |
| return retval; |
| } |
| |
| static errcode_t recover_ext3_journal(e2fsck_t ctx) |
| { |
| struct problem_context pctx; |
| journal_t *journal; |
| errcode_t retval; |
| |
| clear_problem_context(&pctx); |
| |
| retval = jbd2_journal_init_revoke_record_cache(); |
| if (retval) |
| return retval; |
| |
| retval = jbd2_journal_init_revoke_table_cache(); |
| if (retval) |
| return retval; |
| |
| retval = e2fsck_get_journal(ctx, &journal); |
| if (retval) |
| return retval; |
| |
| retval = e2fsck_journal_load(journal); |
| if (retval) |
| goto errout; |
| |
| retval = jbd2_journal_init_revoke(journal, 1024); |
| if (retval) |
| goto errout; |
| |
| retval = -jbd2_journal_recover(journal); |
| if (retval) |
| goto errout; |
| |
| if (journal->j_failed_commit) { |
| pctx.ino = journal->j_failed_commit; |
| fix_problem(ctx, PR_0_JNL_TXN_CORRUPT, &pctx); |
| journal->j_superblock->s_errno = -EINVAL; |
| mark_buffer_dirty(journal->j_sb_buffer); |
| } |
| |
| journal->j_tail_sequence = journal->j_transaction_sequence; |
| |
| errout: |
| jbd2_journal_destroy_revoke(journal); |
| jbd2_journal_destroy_revoke_record_cache(); |
| jbd2_journal_destroy_revoke_table_cache(); |
| e2fsck_journal_release(ctx, journal, 1, 0); |
| return retval; |
| } |
| |
| errcode_t e2fsck_run_ext3_journal(e2fsck_t ctx) |
| { |
| io_manager io_ptr = ctx->fs->io->manager; |
| int blocksize = ctx->fs->blocksize; |
| errcode_t retval, recover_retval; |
| io_stats stats = 0; |
| unsigned long long kbytes_written = 0; |
| |
| printf(_("%s: recovering journal\n"), ctx->device_name); |
| if (ctx->options & E2F_OPT_READONLY) { |
| printf(_("%s: won't do journal recovery while read-only\n"), |
| ctx->device_name); |
| return EXT2_ET_FILE_RO; |
| } |
| |
| if (ctx->fs->flags & EXT2_FLAG_DIRTY) |
| ext2fs_flush(ctx->fs); /* Force out any modifications */ |
| |
| recover_retval = recover_ext3_journal(ctx); |
| |
| /* |
| * Reload the filesystem context to get up-to-date data from disk |
| * because journal recovery will change the filesystem under us. |
| */ |
| if (ctx->fs->super->s_kbytes_written && |
| ctx->fs->io->manager->get_stats) |
| ctx->fs->io->manager->get_stats(ctx->fs->io, &stats); |
| if (stats && stats->bytes_written) |
| kbytes_written = stats->bytes_written >> 10; |
| |
| ext2fs_mmp_stop(ctx->fs); |
| ext2fs_free(ctx->fs); |
| retval = ext2fs_open(ctx->filesystem_name, ctx->openfs_flags, |
| ctx->superblock, blocksize, io_ptr, |
| &ctx->fs); |
| if (retval) { |
| com_err(ctx->program_name, retval, |
| _("while trying to re-open %s"), |
| ctx->device_name); |
| fatal_error(ctx, 0); |
| } |
| ctx->fs->priv_data = ctx; |
| ctx->fs->now = ctx->now; |
| ctx->fs->flags |= EXT2_FLAG_MASTER_SB_ONLY; |
| ctx->fs->super->s_kbytes_written += kbytes_written; |
| |
| /* Set the superblock flags */ |
| e2fsck_clear_recover(ctx, recover_retval != 0); |
| |
| /* |
| * Do one last sanity check, and propagate journal->s_errno to |
| * the EXT2_ERROR_FS flag in the fs superblock if needed. |
| */ |
| retval = e2fsck_check_ext3_journal(ctx); |
| return retval ? retval : recover_retval; |
| } |
| |
| /* |
| * This function will move the journal inode from a visible file in |
| * the filesystem directory hierarchy to the reserved inode if necessary. |
| */ |
| static const char * const journal_names[] = { |
| ".journal", "journal", ".journal.dat", "journal.dat", 0 }; |
| |
| void e2fsck_move_ext3_journal(e2fsck_t ctx) |
| { |
| struct ext2_super_block *sb = ctx->fs->super; |
| struct problem_context pctx; |
| struct ext2_inode inode; |
| ext2_filsys fs = ctx->fs; |
| ext2_ino_t ino; |
| errcode_t retval; |
| const char * const * cpp; |
| dgrp_t group; |
| int mount_flags; |
| |
| clear_problem_context(&pctx); |
| |
| /* |
| * If the filesystem is opened read-only, or there is no |
| * journal, then do nothing. |
| */ |
| if ((ctx->options & E2F_OPT_READONLY) || |
| (sb->s_journal_inum == 0) || |
| !ext2fs_has_feature_journal(sb)) |
| return; |
| |
| /* |
| * Read in the journal inode |
| */ |
| if (ext2fs_read_inode(fs, sb->s_journal_inum, &inode) != 0) |
| return; |
| |
| /* |
| * If it's necessary to backup the journal inode, do so. |
| */ |
| if ((sb->s_jnl_backup_type == 0) || |
| ((sb->s_jnl_backup_type == EXT3_JNL_BACKUP_BLOCKS) && |
| memcmp(inode.i_block, sb->s_jnl_blocks, EXT2_N_BLOCKS*4))) { |
| if (fix_problem(ctx, PR_0_BACKUP_JNL, &pctx)) { |
| memcpy(sb->s_jnl_blocks, inode.i_block, |
| EXT2_N_BLOCKS*4); |
| sb->s_jnl_blocks[15] = inode.i_size_high; |
| sb->s_jnl_blocks[16] = inode.i_size; |
| sb->s_jnl_backup_type = EXT3_JNL_BACKUP_BLOCKS; |
| ext2fs_mark_super_dirty(fs); |
| fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY; |
| } |
| } |
| |
| /* |
| * If the journal is already the hidden inode, then do nothing |
| */ |
| if (sb->s_journal_inum == EXT2_JOURNAL_INO) |
| return; |
| |
| /* |
| * The journal inode had better have only one link and not be readable. |
| */ |
| if (inode.i_links_count != 1) |
| return; |
| |
| /* |
| * If the filesystem is mounted, or we can't tell whether |
| * or not it's mounted, do nothing. |
| */ |
| retval = ext2fs_check_if_mounted(ctx->filesystem_name, &mount_flags); |
| if (retval || (mount_flags & EXT2_MF_MOUNTED)) |
| return; |
| |
| /* |
| * If we can't find the name of the journal inode, then do |
| * nothing. |
| */ |
| for (cpp = journal_names; *cpp; cpp++) { |
| retval = ext2fs_lookup(fs, EXT2_ROOT_INO, *cpp, |
| strlen(*cpp), 0, &ino); |
| if ((retval == 0) && (ino == sb->s_journal_inum)) |
| break; |
| } |
| if (*cpp == 0) |
| return; |
| |
| /* We need the inode bitmap to be loaded */ |
| retval = ext2fs_read_bitmaps(fs); |
| if (retval) |
| return; |
| |
| pctx.str = *cpp; |
| if (!fix_problem(ctx, PR_0_MOVE_JOURNAL, &pctx)) |
| return; |
| |
| /* |
| * OK, we've done all the checks, let's actually move the |
| * journal inode. Errors at this point mean we need to force |
| * an ext2 filesystem check. |
| */ |
| if ((retval = ext2fs_unlink(fs, EXT2_ROOT_INO, *cpp, ino, 0)) != 0) |
| goto err_out; |
| if ((retval = ext2fs_write_inode(fs, EXT2_JOURNAL_INO, &inode)) != 0) |
| goto err_out; |
| sb->s_journal_inum = EXT2_JOURNAL_INO; |
| ext2fs_mark_super_dirty(fs); |
| fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY; |
| inode.i_links_count = 0; |
| inode.i_dtime = ctx->now; |
| if ((retval = ext2fs_write_inode(fs, ino, &inode)) != 0) |
| goto err_out; |
| |
| group = ext2fs_group_of_ino(fs, ino); |
| ext2fs_unmark_inode_bitmap2(fs->inode_map, ino); |
| ext2fs_mark_ib_dirty(fs); |
| ext2fs_bg_free_inodes_count_set(fs, group, ext2fs_bg_free_inodes_count(fs, group) + 1); |
| ext2fs_group_desc_csum_set(fs, group); |
| fs->super->s_free_inodes_count++; |
| return; |
| |
| err_out: |
| pctx.errcode = retval; |
| fix_problem(ctx, PR_0_ERR_MOVE_JOURNAL, &pctx); |
| fs->super->s_state &= ~EXT2_VALID_FS; |
| ext2fs_mark_super_dirty(fs); |
| return; |
| } |
| |
| /* |
| * This function makes sure the superblock hint for the external |
| * journal is correct. |
| */ |
| int e2fsck_fix_ext3_journal_hint(e2fsck_t ctx) |
| { |
| struct ext2_super_block *sb = ctx->fs->super; |
| struct problem_context pctx; |
| char uuid[37], *journal_name; |
| struct stat st; |
| |
| if (!ext2fs_has_feature_journal(sb) || |
| uuid_is_null(sb->s_journal_uuid)) |
| return 0; |
| |
| uuid_unparse(sb->s_journal_uuid, uuid); |
| journal_name = blkid_get_devname(ctx->blkid, "UUID", uuid); |
| if (!journal_name) |
| return 0; |
| |
| if (stat(journal_name, &st) < 0) { |
| free(journal_name); |
| return 0; |
| } |
| |
| if (st.st_rdev != sb->s_journal_dev) { |
| clear_problem_context(&pctx); |
| pctx.num = st.st_rdev; |
| if (fix_problem(ctx, PR_0_EXTERNAL_JOURNAL_HINT, &pctx)) { |
| sb->s_journal_dev = st.st_rdev; |
| ext2fs_mark_super_dirty(ctx->fs); |
| } |
| } |
| |
| free(journal_name); |
| return 0; |
| } |