* %End-Header%
*/
+#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_GETOPT_H
#if HAVE_ERRNO_H
#include <errno.h>
#endif
-#include "ext2fs/tdb.h"
+#include <unistd.h>
+#include <libgen.h>
#include "ext2fs/ext2fs.h"
-#include "nls-enable.h"
+#include "support/nls-enable.h"
-unsigned char mtime_key[] = "filesystem MTIME";
-unsigned char uuid_key[] = "filesystem UUID";
-unsigned char blksize_key[] = "filesystem BLKSIZE";
+#undef DEBUG
-char *prg_name;
+#ifdef DEBUG
+# define dbg_printf(f, a...) do {printf(f, ## a); fflush(stdout); } while (0)
+#else
+# define dbg_printf(f, a...)
+#endif
+
+/*
+ * Undo file format: The file is cut up into undo_header.block_size blocks.
+ * The first block contains the header.
+ * The second block contains the superblock.
+ * There is then a repeating series of blocks as follows:
+ * A key block, which contains undo_keys to map the following data blocks.
+ * Data blocks
+ * (Note that there are pointers to the first key block and the sb, so this
+ * order isn't strictly necessary.)
+ */
+#define E2UNDO_MAGIC "E2UNDO02"
+#define KEYBLOCK_MAGIC 0xCADECADE
+
+#define E2UNDO_STATE_FINISHED 0x1 /* undo file is complete */
+
+#define E2UNDO_MIN_BLOCK_SIZE 1024 /* undo blocks are no less than 1KB */
+#define E2UNDO_MAX_BLOCK_SIZE 1048576 /* undo blocks are no more than 1MB */
+
+struct undo_header {
+ char magic[8]; /* "E2UNDO02" */
+ __le64 num_keys; /* how many keys? */
+ __le64 super_offset; /* where in the file is the superblock copy? */
+ __le64 key_offset; /* where do the key/data block chunks start? */
+ __le32 block_size; /* block size of the undo file */
+ __le32 fs_block_size; /* block size of the target device */
+ __le32 sb_crc; /* crc32c of the superblock */
+ __le32 state; /* e2undo state flags */
+ __le32 f_compat; /* compatible features (none so far) */
+ __le32 f_incompat; /* incompatible features (none so far) */
+ __le32 f_rocompat; /* ro compatible features (none so far) */
+ __le32 pad32; /* padding for fs_offset */
+ __le64 fs_offset; /* filesystem offset */
+ __u8 padding[436]; /* padding */
+ __le32 header_crc; /* crc32c of the header (but not this field) */
+};
+
+#define E2UNDO_MAX_EXTENT_BLOCKS 512 /* max extent size, in blocks */
+
+struct undo_key {
+ __le64 fsblk; /* where in the fs does the block go */
+ __le32 blk_crc; /* crc32c of the block */
+ __le32 size; /* how many bytes in this block? */
+};
+
+struct undo_key_block {
+ __le32 magic; /* KEYBLOCK_MAGIC number */
+ __le32 crc; /* block checksum */
+ __le64 reserved; /* zero */
+#if __GNUC_PREREQ (4, 8)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wpedantic"
+#endif
+ struct undo_key keys[0]; /* keys, which come immediately after */
+#if __GNUC_PREREQ (4, 8)
+#pragma GCC diagnostic pop
+#endif
+};
+
+struct undo_key_info {
+ blk64_t fsblk;
+ blk64_t fileblk;
+ __u32 blk_crc;
+ unsigned int size;
+};
+
+struct undo_context {
+ struct undo_header hdr;
+ io_channel undo_file;
+ unsigned int blocksize, fs_blocksize;
+ blk64_t super_block;
+ size_t num_keys;
+ struct undo_key_info *keys;
+};
+#define KEYS_PER_BLOCK(d) (((d)->blocksize / sizeof(struct undo_key)) - 1)
+
+#define E2UNDO_FEATURE_COMPAT_FS_OFFSET 0x1 /* the filesystem offset */
+
+static inline int e2undo_has_feature_fs_offset(struct undo_header *header) {
+ return ext2fs_le32_to_cpu(header->f_compat) &
+ E2UNDO_FEATURE_COMPAT_FS_OFFSET;
+}
+
+static char *prg_name;
+static char *undo_file;
-static void usage(char *prg_name)
+static void usage(void)
{
fprintf(stderr,
- _("Usage: %s <transaction file> <filesystem>\n"), prg_name);
+ _("Usage: %s [-f] [-h] [-n] [-o offset] [-v] [-z undo_file] <transaction file> <filesystem>\n"), prg_name);
exit(1);
+}
+
+static void dump_header(struct undo_header *hdr)
+{
+ printf("nr keys:\t%llu\n",
+ (unsigned long long) ext2fs_le64_to_cpu(hdr->num_keys));
+ printf("super block:\t%llu\n",
+ (unsigned long long) ext2fs_le64_to_cpu(hdr->super_offset));
+ printf("key block:\t%llu\n",
+ (unsigned long long) ext2fs_le64_to_cpu(hdr->key_offset));
+ printf("block size:\t%u\n", ext2fs_le32_to_cpu(hdr->block_size));
+ printf("fs block size:\t%u\n", ext2fs_le32_to_cpu(hdr->fs_block_size));
+ printf("super crc:\t0x%x\n", ext2fs_le32_to_cpu(hdr->sb_crc));
+ printf("state:\t\t0x%x\n", ext2fs_le32_to_cpu(hdr->state));
+ printf("compat:\t\t0x%x\n", ext2fs_le32_to_cpu(hdr->f_compat));
+ printf("incompat:\t0x%x\n", ext2fs_le32_to_cpu(hdr->f_incompat));
+ printf("rocompat:\t0x%x\n", ext2fs_le32_to_cpu(hdr->f_rocompat));
+ if (e2undo_has_feature_fs_offset(hdr))
+ printf("fs offset:\t%llu\n",
+ (unsigned long long) ext2fs_le64_to_cpu(hdr->fs_offset));
+ printf("header crc:\t0x%x\n", ext2fs_le32_to_cpu(hdr->header_crc));
+}
+static void print_undo_mismatch(struct ext2_super_block *fs_super,
+ struct ext2_super_block *undo_super)
+{
+ printf("%s",
+ _("The file system superblock doesn't match the undo file.\n"));
+ if (memcmp(fs_super->s_uuid, undo_super->s_uuid,
+ sizeof(fs_super->s_uuid)))
+ printf("%s", _("UUID does not match.\n"));
+ if (fs_super->s_mtime != undo_super->s_mtime)
+ printf("%s", _("Last mount time does not match.\n"));
+ if (fs_super->s_wtime != undo_super->s_wtime)
+ printf("%s", _("Last write time does not match.\n"));
+ if (fs_super->s_kbytes_written != undo_super->s_kbytes_written)
+ printf("%s", _("Lifetime write counter does not match.\n"));
}
-static int check_filesystem(TDB_CONTEXT *tdb, io_channel channel)
+static int check_filesystem(struct undo_context *ctx, io_channel channel)
{
- __u32 s_mtime;
- __u8 s_uuid[16];
+ struct ext2_super_block super, *sb;
+ char *buf;
+ __u32 sb_crc;
errcode_t retval;
- TDB_DATA tdb_key, tdb_data;
- struct ext2_super_block super;
io_channel_set_blksize(channel, SUPERBLOCK_OFFSET);
- retval = io_channel_read_blk(channel, 1, -SUPERBLOCK_SIZE, &super);
+ retval = io_channel_read_blk64(channel, 1, -SUPERBLOCK_SIZE, &super);
if (retval) {
- com_err(prg_name,
- retval, _("Failed to read the file system data \n"));
+ com_err(prg_name, retval,
+ "%s", _("while reading filesystem superblock."));
return retval;
}
- tdb_key.dptr = mtime_key;
- tdb_key.dsize = sizeof(mtime_key);
- tdb_data = tdb_fetch(tdb, tdb_key);
- if (!tdb_data.dptr) {
- retval = EXT2_ET_TDB_SUCCESS + tdb_error(tdb);
- com_err(prg_name, retval,
- _("Failed tdb_fetch %s\n"), tdb_errorstr(tdb));
+ /*
+ * Compare the FS and the undo file superblock so that we can't apply
+ * e2undo "patches" out of order.
+ */
+ retval = ext2fs_get_mem(ctx->blocksize, &buf);
+ if (retval) {
+ com_err(prg_name, retval, "%s", _("while allocating memory"));
return retval;
}
-
- s_mtime = *(__u32 *)tdb_data.dptr;
- if (super.s_mtime != s_mtime) {
-
- com_err(prg_name, 0,
- _("The file system Mount time didn't match %u\n"),
- s_mtime);
-
- return -1;
+ retval = io_channel_read_blk64(ctx->undo_file, ctx->super_block,
+ -SUPERBLOCK_SIZE, buf);
+ if (retval) {
+ com_err(prg_name, retval, "%s", _("while fetching superblock"));
+ goto out;
}
-
-
- tdb_key.dptr = uuid_key;
- tdb_key.dsize = sizeof(uuid_key);
- tdb_data = tdb_fetch(tdb, tdb_key);
- if (!tdb_data.dptr) {
- retval = EXT2_ET_TDB_SUCCESS + tdb_error(tdb);
- com_err(prg_name, retval,
- _("Failed tdb_fetch %s\n"), tdb_errorstr(tdb));
- return retval;
+ sb = (struct ext2_super_block *)buf;
+ sb->s_magic = ~sb->s_magic;
+ if (memcmp(&super, buf, sizeof(super))) {
+ print_undo_mismatch(&super, (struct ext2_super_block *)buf);
+ retval = -1;
+ goto out;
}
- memcpy(s_uuid, tdb_data.dptr, sizeof(s_uuid));
- if (memcmp(s_uuid, super.s_uuid, sizeof(s_uuid))) {
- com_err(prg_name, 0,
- _("The file system UUID didn't match \n"));
- return -1;
+ sb_crc = ext2fs_crc32c_le(~0, (unsigned char *)buf, SUPERBLOCK_SIZE);
+ if (ext2fs_le32_to_cpu(ctx->hdr.sb_crc) != sb_crc) {
+ fprintf(stderr,
+ _("Undo file superblock checksum doesn't match.\n"));
+ retval = -1;
+ goto out;
}
- return 0;
+out:
+ ext2fs_free_mem(&buf);
+ return retval;
}
-static int set_blk_size(TDB_CONTEXT *tdb, io_channel channel)
+static int key_compare(const void *a, const void *b)
{
- int block_size;
- errcode_t retval;
- TDB_DATA tdb_key, tdb_data;
+ const struct undo_key_info *ka, *kb;
- tdb_key.dptr = blksize_key;
- tdb_key.dsize = sizeof(blksize_key);
- tdb_data = tdb_fetch(tdb, tdb_key);
- if (!tdb_data.dptr) {
- retval = EXT2_ET_TDB_SUCCESS + tdb_error(tdb);
- com_err(prg_name, retval,
- _("Failed tdb_fetch %s\n"), tdb_errorstr(tdb));
+ ka = a;
+ kb = b;
+ return ka->fsblk - kb->fsblk;
+}
+
+static int e2undo_setup_tdb(const char *name, io_manager *io_ptr)
+{
+ errcode_t retval = 0;
+ const char *tdb_dir;
+ char *tdb_file = NULL;
+ char *dev_name, *tmp_name;
+
+ /* (re)open a specific undo file */
+ if (undo_file && undo_file[0] != 0) {
+ retval = set_undo_io_backing_manager(*io_ptr);
+ if (retval)
+ goto err;
+ *io_ptr = undo_io_manager;
+ retval = set_undo_io_backup_file(undo_file);
+ if (retval)
+ goto err;
+ printf(_("Overwriting existing filesystem; this can be undone "
+ "using the command:\n"
+ " e2undo %s %s\n\n"),
+ undo_file, name);
return retval;
}
- block_size = *(int *)tdb_data.dptr;
-#ifdef DEBUG
- printf("Block size %d\n", block_size);
-#endif
- io_channel_set_blksize(channel, block_size);
+ /*
+ * Configuration via a conf file would be
+ * nice
+ */
+ tdb_dir = getenv("E2FSPROGS_UNDO_DIR");
+ if (!tdb_dir)
+ tdb_dir = "/var/lib/e2fsprogs";
+
+ if (!strcmp(tdb_dir, "none") || (tdb_dir[0] == 0) ||
+ access(tdb_dir, W_OK))
+ return 0;
+
+ tmp_name = strdup(name);
+ if (!tmp_name)
+ goto errout;
+ dev_name = basename(tmp_name);
+ tdb_file = malloc(strlen(tdb_dir) + 8 + strlen(dev_name) + 7 + 1);
+ if (!tdb_file) {
+ free(tmp_name);
+ goto errout;
+ }
+ sprintf(tdb_file, "%s/e2undo-%s.e2undo", tdb_dir, dev_name);
+ free(tmp_name);
+ if ((unlink(tdb_file) < 0) && (errno != ENOENT)) {
+ retval = errno;
+ com_err(prg_name, retval,
+ _("while trying to delete %s"), tdb_file);
+ goto errout;
+ }
+
+ retval = set_undo_io_backing_manager(*io_ptr);
+ if (retval)
+ goto errout;
+ *io_ptr = undo_io_manager;
+ retval = set_undo_io_backup_file(tdb_file);
+ if (retval)
+ goto errout;
+ printf(_("Overwriting existing filesystem; this can be undone "
+ "using the command:\n"
+ " e2undo %s %s\n\n"),
+ tdb_file, name);
+
+ free(tdb_file);
return 0;
+errout:
+ free(tdb_file);
+err:
+ com_err(prg_name, retval, "while trying to setup undo file\n");
+ return retval;
}
int main(int argc, char *argv[])
{
- int c,force = 0;
- TDB_CONTEXT *tdb;
- TDB_DATA key, data;
+ int c, force = 0, dry_run = 0, verbose = 0, dump = 0;
io_channel channel;
errcode_t retval;
- int mount_flags;
- unsigned long blk_num;
+ int mount_flags, csum_error = 0, io_error = 0;
+ size_t i, keys_per_block;
char *device_name, *tdb_file;
io_manager manager = unix_io_manager;
+ struct undo_context undo_ctx;
+ char *buf;
+ struct undo_key_block *keyb;
+ struct undo_key *dkey;
+ struct undo_key_info *ikey;
+ __u32 key_crc, blk_crc, hdr_crc;
+ blk64_t lblk;
+ ext2_filsys fs;
+ __u64 offset = 0;
+ char opt_offset_string[40] = { 0 };
#ifdef ENABLE_NLS
setlocale(LC_MESSAGES, "");
setlocale(LC_CTYPE, "");
bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
textdomain(NLS_CAT_NAME);
+ set_com_err_gettext(gettext);
#endif
+ add_error_table(&et_ext2_error_table);
prg_name = argv[0];
- while((c = getopt(argc, argv, "f")) != EOF) {
+ while ((c = getopt(argc, argv, "fhno:vz:")) != EOF) {
switch (c) {
- case 'f':
- force = 1;
- break;
- default:
- usage(prg_name);
+ case 'f':
+ force = 1;
+ break;
+ case 'h':
+ dump = 1;
+ break;
+ case 'n':
+ dry_run = 1;
+ break;
+ case 'o':
+ offset = strtoull(optarg, &buf, 0);
+ if (*buf) {
+ com_err(prg_name, 0,
+ _("illegal offset - %s"), optarg);
+ exit(1);
+ }
+ /* used to indicate that an offset was specified */
+ opt_offset_string[0] = 1;
+ break;
+ case 'v':
+ verbose = 1;
+ break;
+ case 'z':
+ undo_file = optarg;
+ break;
+ default:
+ usage();
}
}
- if (argc != optind+2)
- usage(prg_name);
+ if (argc != optind + 2)
+ usage();
tdb_file = argv[optind];
device_name = argv[optind+1];
- tdb = tdb_open(tdb_file, 0, 0, O_RDONLY, 0600);
+ if (undo_file && strcmp(tdb_file, undo_file) == 0) {
+ printf(_("Will not write to an undo file while replaying it.\n"));
+ exit(1);
+ }
- if (!tdb) {
+ /* Interpret the undo file */
+ retval = manager->open(tdb_file, IO_FLAG_EXCLUSIVE,
+ &undo_ctx.undo_file);
+ if (retval) {
com_err(prg_name, errno,
- _("Failed tdb_open %s\n"), tdb_file);
+ _("while opening undo file `%s'\n"), tdb_file);
+ exit(1);
+ }
+ retval = io_channel_read_blk64(undo_ctx.undo_file, 0,
+ -(int)sizeof(undo_ctx.hdr),
+ &undo_ctx.hdr);
+ if (retval) {
+ com_err(prg_name, retval, _("while reading undo file"));
+ exit(1);
+ }
+ if (memcmp(undo_ctx.hdr.magic, E2UNDO_MAGIC,
+ sizeof(undo_ctx.hdr.magic))) {
+ fprintf(stderr, _("%s: Not an undo file.\n"), tdb_file);
+ exit(1);
+ }
+ if (dump) {
+ dump_header(&undo_ctx.hdr);
+ exit(1);
+ }
+ hdr_crc = ext2fs_crc32c_le(~0, (unsigned char *)&undo_ctx.hdr,
+ sizeof(struct undo_header) -
+ sizeof(__u32));
+ if (!force && ext2fs_le32_to_cpu(undo_ctx.hdr.header_crc) != hdr_crc) {
+ fprintf(stderr, _("%s: Header checksum doesn't match.\n"),
+ tdb_file);
+ exit(1);
+ }
+ undo_ctx.blocksize = ext2fs_le32_to_cpu(undo_ctx.hdr.block_size);
+ undo_ctx.fs_blocksize = ext2fs_le32_to_cpu(undo_ctx.hdr.fs_block_size);
+ if (undo_ctx.blocksize == 0 || undo_ctx.fs_blocksize == 0) {
+ fprintf(stderr, _("%s: Corrupt undo file header.\n"), tdb_file);
+ exit(1);
+ }
+ if (!force && undo_ctx.blocksize > E2UNDO_MAX_BLOCK_SIZE) {
+ fprintf(stderr, _("%s: Undo block size too large.\n"),
+ tdb_file);
+ exit(1);
+ }
+ if (!force && undo_ctx.blocksize < E2UNDO_MIN_BLOCK_SIZE) {
+ fprintf(stderr, _("%s: Undo block size too small.\n"),
+ tdb_file);
+ exit(1);
+ }
+ undo_ctx.super_block = ext2fs_le64_to_cpu(undo_ctx.hdr.super_offset);
+ undo_ctx.num_keys = ext2fs_le64_to_cpu(undo_ctx.hdr.num_keys);
+ io_channel_set_blksize(undo_ctx.undo_file, undo_ctx.blocksize);
+ /*
+ * Do not compare undo_ctx.hdr.f_compat with the available compatible
+ * features set, because a "missing" compatible feature should
+ * not cause any problems.
+ */
+ if (!force && (undo_ctx.hdr.f_incompat || undo_ctx.hdr.f_rocompat)) {
+ fprintf(stderr, _("%s: Unknown undo file feature set.\n"),
+ tdb_file);
exit(1);
}
+ /* open the fs */
retval = ext2fs_check_if_mounted(device_name, &mount_flags);
if (retval) {
com_err(prg_name, retval, _("Error while determining whether "
- "%s is mounted.\n"), device_name);
+ "%s is mounted."), device_name);
exit(1);
}
if (mount_flags & EXT2_MF_MOUNTED) {
- com_err(prg_name, retval, _("e2undo should only be run on "
- "unmounted file system\n"));
+ com_err(prg_name, retval, "%s", _("e2undo should only be run "
+ "on unmounted filesystems"));
exit(1);
}
+ if (undo_file) {
+ retval = e2undo_setup_tdb(device_name, &manager);
+ if (retval)
+ exit(1);
+ }
+
retval = manager->open(device_name,
- IO_FLAG_EXCLUSIVE | IO_FLAG_RW, &channel);
+ IO_FLAG_EXCLUSIVE | (dry_run ? 0 : IO_FLAG_RW),
+ &channel);
if (retval) {
com_err(prg_name, retval,
- _("Failed to open %s\n"), device_name);
+ _("while opening `%s'"), device_name);
exit(1);
}
- if (!force && check_filesystem(tdb, channel)) {
- exit(1);
+ if (*opt_offset_string || e2undo_has_feature_fs_offset(&undo_ctx.hdr)) {
+ if (!*opt_offset_string)
+ offset = ext2fs_le64_to_cpu(undo_ctx.hdr.fs_offset);
+ retval = snprintf(opt_offset_string, sizeof(opt_offset_string),
+ "offset=%llu", (unsigned long long) offset);
+ if ((size_t) retval >= sizeof(opt_offset_string)) {
+ /* should not happen... */
+ com_err(prg_name, 0, _("specified offset is too large"));
+ exit(1);
+ }
+ io_channel_set_options(channel, opt_offset_string);
}
- if (set_blk_size(tdb, channel)) {
+ if (!force && check_filesystem(&undo_ctx, channel))
+ exit(1);
+
+ /* prepare to read keys */
+ retval = ext2fs_get_mem(sizeof(struct undo_key_info) * undo_ctx.num_keys,
+ &undo_ctx.keys);
+ if (retval) {
+ com_err(prg_name, retval, "%s", _("while allocating memory"));
+ exit(1);
+ }
+ ikey = undo_ctx.keys;
+ retval = ext2fs_get_mem(undo_ctx.blocksize, &keyb);
+ if (retval) {
+ com_err(prg_name, retval, "%s", _("while allocating memory"));
+ exit(1);
+ }
+ retval = ext2fs_get_mem(E2UNDO_MAX_EXTENT_BLOCKS * undo_ctx.blocksize,
+ &buf);
+ if (retval) {
+ com_err(prg_name, retval, "%s", _("while allocating memory"));
exit(1);
}
- for (key = tdb_firstkey(tdb); key.dptr; key = tdb_nextkey(tdb, key)) {
- if (!strcmp((char *) key.dptr, (char *) mtime_key) ||
- !strcmp((char *) key.dptr, (char *) uuid_key) ||
- !strcmp((char *) key.dptr, (char *) blksize_key)) {
- continue;
+ /* load keys */
+ keys_per_block = KEYS_PER_BLOCK(&undo_ctx);
+ lblk = ext2fs_le64_to_cpu(undo_ctx.hdr.key_offset);
+ dbg_printf("nr_keys=%lu, kpb=%zu, blksz=%u\n",
+ undo_ctx.num_keys, keys_per_block, undo_ctx.blocksize);
+ for (i = 0; i < undo_ctx.num_keys; i += keys_per_block) {
+ size_t j, max_j;
+ __le32 crc;
+
+ retval = io_channel_read_blk64(undo_ctx.undo_file,
+ lblk, 1, keyb);
+ if (retval) {
+ com_err(prg_name, retval, "%s", _("while reading keys"));
+ if (force) {
+ io_error = 1;
+ undo_ctx.num_keys = i - 1;
+ break;
+ }
+ exit(1);
}
- data = tdb_fetch(tdb, key);
- if (!data.dptr) {
- com_err(prg_name, 0,
- _("Failed tdb_fetch %s\n"), tdb_errorstr(tdb));
+ /* check keys */
+ if (!force &&
+ ext2fs_le32_to_cpu(keyb->magic) != KEYBLOCK_MAGIC) {
+ fprintf(stderr, _("%s: wrong key magic at %llu\n"),
+ tdb_file, (unsigned long long) lblk);
exit(1);
}
- blk_num = *(unsigned long *)key.dptr;
- printf(_("Replayed transaction of size %zd at location %ld\n"),
- data.dsize, blk_num);
- retval = io_channel_write_blk(channel, blk_num,
- -data.dsize, data.dptr);
- if (retval == -1) {
- com_err(prg_name, retval,
- _("Failed write %s\n"),
- strerror(errno));
+ crc = keyb->crc;
+ keyb->crc = 0;
+ key_crc = ext2fs_crc32c_le(~0, (unsigned char *)keyb,
+ undo_ctx.blocksize);
+ if (!force && ext2fs_le32_to_cpu(crc) != key_crc) {
+ fprintf(stderr,
+ _("%s: key block checksum error at %llu.\n"),
+ tdb_file, (unsigned long long) lblk);
exit(1);
}
+
+ /* load keys from key block */
+ lblk++;
+ max_j = undo_ctx.num_keys - i;
+ if (max_j > keys_per_block)
+ max_j = keys_per_block;
+ for (j = 0, dkey = keyb->keys;
+ j < max_j;
+ j++, ikey++, dkey++) {
+ ikey->fsblk = ext2fs_le64_to_cpu(dkey->fsblk);
+ ikey->fileblk = lblk;
+ ikey->blk_crc = ext2fs_le32_to_cpu(dkey->blk_crc);
+ ikey->size = ext2fs_le32_to_cpu(dkey->size);
+ lblk += (ikey->size + undo_ctx.blocksize - 1) /
+ undo_ctx.blocksize;
+
+ if (E2UNDO_MAX_EXTENT_BLOCKS * undo_ctx.blocksize <
+ ikey->size) {
+ com_err(prg_name, retval,
+ _("%s: block %llu is too long."),
+ tdb_file,
+ (unsigned long long) ikey->fsblk);
+ exit(1);
+ }
+
+ /* check each block's crc */
+ retval = io_channel_read_blk64(undo_ctx.undo_file,
+ ikey->fileblk,
+ -(int)ikey->size,
+ buf);
+ if (retval) {
+ com_err(prg_name, retval,
+ _("while fetching block %llu."),
+ (unsigned long long) ikey->fileblk);
+ if (!force)
+ exit(1);
+ io_error = 1;
+ continue;
+ }
+
+ blk_crc = ext2fs_crc32c_le(~0, (unsigned char *)buf,
+ ikey->size);
+ if (blk_crc != ikey->blk_crc) {
+ fprintf(stderr,
+ _("checksum error in filesystem block "
+ "%llu (undo blk %llu)\n"),
+ (unsigned long long) ikey->fsblk,
+ (unsigned long long) ikey->fileblk);
+ if (!force)
+ exit(1);
+ csum_error = 1;
+ }
+ }
}
+ ext2fs_free_mem(&keyb);
+
+ /* sort keys in fs block order */
+ qsort(undo_ctx.keys, undo_ctx.num_keys, sizeof(struct undo_key_info),
+ key_compare);
+
+ /* replay */
+ io_channel_set_blksize(channel, undo_ctx.fs_blocksize);
+ for (i = 0, ikey = undo_ctx.keys; i < undo_ctx.num_keys; i++, ikey++) {
+ retval = io_channel_read_blk64(undo_ctx.undo_file,
+ ikey->fileblk,
+ -(int)ikey->size,
+ buf);
+ if (retval) {
+ com_err(prg_name, retval,
+ _("while fetching block %llu."),
+ (unsigned long long) ikey->fileblk);
+ io_error = 1;
+ continue;
+ }
+
+ if (verbose)
+ printf("Replayed block of size %u from %llu to %llu\n",
+ ikey->size, (unsigned long long) ikey->fileblk,
+ (unsigned long long) ikey->fsblk);
+ if (dry_run)
+ continue;
+ retval = io_channel_write_blk64(channel, ikey->fsblk,
+ -(int)ikey->size, buf);
+ if (retval) {
+ com_err(prg_name, retval,
+ _("while writing block %llu."),
+ (unsigned long long) ikey->fsblk);
+ io_error = 1;
+ }
+ }
+
+ if (csum_error)
+ fprintf(stderr, _("Undo file corruption; run e2fsck NOW!\n"));
+ if (io_error)
+ fprintf(stderr, _("IO error during replay; run e2fsck NOW!\n"));
+ if (!(ext2fs_le32_to_cpu(undo_ctx.hdr.state) & E2UNDO_STATE_FINISHED)) {
+ force = 1;
+ fprintf(stderr, _("Incomplete undo record; run e2fsck.\n"));
+ }
+ ext2fs_free_mem(&buf);
+ ext2fs_free_mem(&undo_ctx.keys);
io_channel_close(channel);
- tdb_close(tdb);
- return 0;
+ /* If there were problems, try to force a fsck */
+ if (!dry_run && (force || csum_error || io_error)) {
+ retval = ext2fs_open2(device_name, NULL,
+ EXT2_FLAG_RW | EXT2_FLAG_64BITS, 0, 0,
+ manager, &fs);
+ if (retval)
+ goto out;
+ fs->super->s_state &= ~EXT2_VALID_FS;
+ if (csum_error || io_error)
+ fs->super->s_state |= EXT2_ERROR_FS;
+ ext2fs_mark_super_dirty(fs);
+ ext2fs_close_free(&fs);
+ }
+
+out:
+ io_channel_close(undo_ctx.undo_file);
+
+ return csum_error;
}
git://git.whamcloud.com / tools / e2fsprogs.git / blobdiff