#include <lzo/lzoconf.h>
#include <lzo/lzo1x.h>
#include <zlib.h>
+#if BTRFSRESTORE_ZSTD
+#include <zstd.h>
+#endif
#include <regex.h>
#include <getopt.h>
#include <sys/types.h>
return 0;
}
+static int decompress_zstd(const char *inbuf, char *outbuf, u64 compress_len,
+ u64 decompress_len)
+{
+#if !BTRFSRESTORE_ZSTD
+ error("btrfs not compiled with zstd support");
+ return -1;
+#else
+ ZSTD_DStream *strm;
+ size_t zret;
+ int ret = 0;
+ ZSTD_inBuffer in = {inbuf, compress_len, 0};
+ ZSTD_outBuffer out = {outbuf, decompress_len, 0};
+
+ strm = ZSTD_createDStream();
+ if (!strm) {
+ error("zstd create failed");
+ return -1;
+ }
+
+ zret = ZSTD_initDStream(strm);
+ if (ZSTD_isError(zret)) {
+ error("zstd init failed: %s", ZSTD_getErrorName(zret));
+ ret = -1;
+ goto out;
+ }
+
+ zret = ZSTD_decompressStream(strm, &out, &in);
+ if (ZSTD_isError(zret)) {
+ error("zstd decompress failed %s\n", ZSTD_getErrorName(zret));
+ ret = -1;
+ goto out;
+ }
+ if (zret != 0) {
+ error("zstd frame incomplete");
+ ret = -1;
+ goto out;
+ }
+
+out:
+ ZSTD_freeDStream(strm);
+ return ret;
+#endif
+}
+
static int decompress(struct btrfs_root *root, char *inbuf, char *outbuf,
u64 compress_len, u64 *decompress_len, int compress)
{
case BTRFS_COMPRESS_LZO:
return decompress_lzo(root, (unsigned char *)inbuf, outbuf,
compress_len, decompress_len);
+ case BTRFS_COMPRESS_ZSTD:
+ return decompress_zstd(inbuf, outbuf, compress_len,
+ *decompress_len);
default:
break;
}
}
again:
length = size_left;
- ret = btrfs_map_block(&root->fs_info->mapping_tree, READ,
- bytenr, &length, &multi, mirror_num, NULL);
+ ret = btrfs_map_block(root->fs_info, READ, bytenr, &length, &multi,
+ mirror_num, NULL);
if (ret) {
error("cannot map block logical %llu length %llu: %d",
(unsigned long long)bytenr,
done = pread(dev_fd, inbuf+count, length, dev_bytenr);
/* Need both checks, or we miss negative values due to u64 conversion */
if (done < 0 || done < length) {
- num_copies = btrfs_num_copies(&root->fs_info->mapping_tree,
- bytenr, length);
+ num_copies = btrfs_num_copies(root->fs_info, bytenr, length);
mirror_num++;
/* mirror_num is 1-indexed, so num_copies is a valid mirror. */
if (mirror_num > num_copies) {
pos+total);
if (done < 0) {
ret = -1;
- error("cannot write data: %d %s", errno, strerror(errno));
+ error("cannot write data: %d %m", errno);
goto out;
}
total += done;
ret = decompress(root, inbuf, outbuf, disk_size, &ram_size, compress);
if (ret) {
- num_copies = btrfs_num_copies(&root->fs_info->mapping_tree,
- bytenr, length);
+ num_copies = btrfs_num_copies(root->fs_info, bytenr, length);
mirror_num++;
if (mirror_num >= num_copies) {
ret = -1;
data_len = len;
if (fsetxattr(fd, name, data, data_len, 0))
- error("setting extended attribute %s on file %s: %s",
- name, file_name, strerror(errno));
+ error("setting extended attribute %s on file %s: %m",
+ name, file_name);
len = sizeof(*di) + name_len + data_len;
cur += len;
ret = fchown(fd, btrfs_inode_uid(path.nodes[0], inode_item),
btrfs_inode_gid(path.nodes[0], inode_item));
if (ret) {
- error("failed to change owner: %s", strerror(errno));
+ error("failed to change owner: %m");
goto out;
}
ret = fchmod(fd, btrfs_inode_mode(path.nodes[0], inode_item));
if (ret) {
- error("failed to change mode: %s", strerror(errno));
+ error("failed to change mode: %m");
goto out;
}
ret = futimens(fd, times);
if (ret) {
- error("failed to set times: %s", strerror(errno));
+ error("failed to set times: %m");
goto out;
}
}
if (!dry_run) {
ret = symlink(symlink_target, path_name);
if (ret < 0) {
- fprintf(stderr, "Failed to restore symlink '%s': %s\n",
- path_name, strerror(errno));
+ fprintf(stderr, "Failed to restore symlink '%s': %m\n",
+ path_name);
goto out;
}
}
btrfs_inode_gid(path.nodes[0], inode_item),
AT_SYMLINK_NOFOLLOW);
if (ret) {
- fprintf(stderr, "Failed to change owner: %s\n",
- strerror(errno));
+ fprintf(stderr, "Failed to change owner: %m\n");
goto out;
}
ret = utimensat(-1, file, times, AT_SYMLINK_NOFOLLOW);
if (ret)
- fprintf(stderr, "Failed to set times: %s\n", strerror(errno));
+ fprintf(stderr, "Failed to set times: %m\n");
out:
btrfs_release_path(&path);
return ret;
for (i = super_mirror; i < BTRFS_SUPER_MIRROR_MAX; i++) {
bytenr = btrfs_sb_offset(i);
+
+ /*
+ * Restore won't allocate extent and doesn't care anything
+ * in extent tree. Skip block group item search will allow
+ * restore to be executed on heavily damaged fs.
+ */
fs_info = open_ctree_fs_info(dev, bytenr, root_location, 0,
- OPEN_CTREE_PARTIAL);
+ OPEN_CTREE_PARTIAL |
+ OPEN_CTREE_NO_BLOCK_GROUPS);
if (fs_info)
break;
fprintf(stderr, "Could not open root, trying backup super\n");
root_location = btrfs_super_root(fs_info->super_copy);
generation = btrfs_super_generation(fs_info->super_copy);
root->node = read_tree_block(fs_info, root_location,
- fs_info->nodesize, generation);
+ generation);
if (!extent_buffer_uptodate(root->node)) {
fprintf(stderr, "Error opening tree root\n");
close_ctree(root);
if (fs_location != 0) {
free_extent_buffer(root->node);
- root->node = read_tree_block(root->fs_info, fs_location,
- root->fs_info->nodesize, 0);
+ root->node = read_tree_block(root->fs_info, fs_location, 0);
if (!extent_buffer_uptodate(root->node)) {
fprintf(stderr, "Failed to read fs location\n");
ret = 1;
projects / platform / upstream / btrfs-progs.git / blobdiff