static char fs_name[PATH_MAX];
static char path_name[PATH_MAX];
+static char symlink_target[PATH_MAX];
static int get_snaps = 0;
static int verbose = 0;
static int restore_metadata = 0;
+static int restore_symlinks = 0;
static int ignore_errors = 0;
static int overwrite = 0;
static int get_xattrs = 0;
static int dry_run = 0;
#define LZO_LEN 4
-#define PAGE_CACHE_SIZE 4096
#define lzo1x_worst_compress(x) ((x) + ((x) / 16) + 64 + 3)
static int decompress_zlib(char *inbuf, char *outbuf, u64 compress_len,
memset(&strm, 0, sizeof(strm));
ret = inflateInit(&strm);
if (ret != Z_OK) {
- fprintf(stderr, "inflate init returnd %d\n", ret);
+ error("zlib init returned %d", ret);
return -1;
}
ret = inflate(&strm, Z_NO_FLUSH);
if (ret != Z_STREAM_END) {
(void)inflateEnd(&strm);
- fprintf(stderr, "failed to inflate: %d\n", ret);
+ error("zlib inflate failed: %d", ret);
return -1;
}
return le32_to_cpu(dlen);
}
-static int decompress_lzo(unsigned char *inbuf, char *outbuf, u64 compress_len,
- u64 *decompress_len)
+static int decompress_lzo(struct btrfs_root *root, unsigned char *inbuf,
+ char *outbuf, u64 compress_len, u64 *decompress_len)
{
size_t new_len;
size_t in_len;
ret = lzo_init();
if (ret != LZO_E_OK) {
- fprintf(stderr, "lzo init returned %d\n", ret);
+ error("lzo init returned %d", ret);
return -1;
}
in_len = read_compress_length(inbuf);
if ((tot_in + LZO_LEN + in_len) > tot_len) {
- fprintf(stderr, "bad compress length %lu\n",
+ error("bad compress length %lu",
(unsigned long)in_len);
return -1;
}
inbuf += LZO_LEN;
tot_in += LZO_LEN;
-
- new_len = lzo1x_worst_compress(PAGE_CACHE_SIZE);
+ new_len = lzo1x_worst_compress(root->sectorsize);
ret = lzo1x_decompress_safe((const unsigned char *)inbuf, in_len,
(unsigned char *)outbuf,
(void *)&new_len, NULL);
if (ret != LZO_E_OK) {
- fprintf(stderr, "failed to inflate: %d\n", ret);
+ error("lzo decompress failed: %d", ret);
return -1;
}
out_len += new_len;
* If the 4 byte header does not fit to the rest of the page we
* have to move to the next one, unless we read some garbage
*/
- mod_page = tot_in % PAGE_CACHE_SIZE;
- rem_page = PAGE_CACHE_SIZE - mod_page;
+ mod_page = tot_in % root->sectorsize;
+ rem_page = root->sectorsize - mod_page;
if (rem_page < LZO_LEN) {
inbuf += rem_page;
tot_in += rem_page;
return 0;
}
-static int decompress(char *inbuf, char *outbuf, u64 compress_len,
- u64 *decompress_len, int compress)
+static int decompress(struct btrfs_root *root, char *inbuf, char *outbuf,
+ u64 compress_len, u64 *decompress_len, int compress)
{
switch (compress) {
case BTRFS_COMPRESS_ZLIB:
return decompress_zlib(inbuf, outbuf, compress_len,
*decompress_len);
case BTRFS_COMPRESS_LZO:
- return decompress_lzo((unsigned char *)inbuf, outbuf, compress_len,
- decompress_len);
+ return decompress_lzo(root, (unsigned char *)inbuf, outbuf,
+ compress_len, decompress_len);
default:
break;
}
- fprintf(stderr, "invalid compression type: %d\n", compress);
+ error("invalid compression type: %d", compress);
return -1;
}
return 0;
}
-static int copy_one_inline(int fd, struct btrfs_path *path, u64 pos)
+static int copy_one_inline(struct btrfs_root *root, int fd,
+ struct btrfs_path *path, u64 pos)
{
struct extent_buffer *leaf = path->nodes[0];
struct btrfs_file_extent_item *fi;
ram_size = btrfs_file_extent_ram_bytes(leaf, fi);
outbuf = calloc(1, ram_size);
if (!outbuf) {
- fprintf(stderr, "No memory\n");
+ error("not enough memory");
return -ENOMEM;
}
- ret = decompress(buf, outbuf, len, &ram_size, compress);
+ ret = decompress(root, buf, outbuf, len, &ram_size, compress);
if (ret) {
free(outbuf);
return ret;
inbuf = malloc(size_left);
if (!inbuf) {
- fprintf(stderr, "No memory\n");
+ error("not enough memory\n");
return -ENOMEM;
}
if (compress != BTRFS_COMPRESS_NONE) {
outbuf = calloc(1, ram_size);
if (!outbuf) {
- fprintf(stderr, "No memory\n");
+ error("not enough memory");
free(inbuf);
return -ENOMEM;
}
ret = btrfs_map_block(&root->fs_info->mapping_tree, READ,
bytenr, &length, &multi, mirror_num, NULL);
if (ret) {
- fprintf(stderr, "Error mapping block %d\n", ret);
+ error("cannot map block logical %llu length %llu: %d",
+ (unsigned long long)bytenr,
+ (unsigned long long)length, ret);
goto out;
}
device = multi->stripes[0].dev;
/* mirror_num is 1-indexed, so num_copies is a valid mirror. */
if (mirror_num > num_copies) {
ret = -1;
- fprintf(stderr, "Exhausted mirrors trying to read\n");
+ error("exhausted mirrors trying to read (%d > %d)",
+ mirror_num, num_copies);
goto out;
}
fprintf(stderr, "Trying another mirror\n");
pos+total);
if (done < 0) {
ret = -1;
- fprintf(stderr, "Error writing: %d %s\n", errno, strerror(errno));
+ error("cannot write data: %d %s", errno, strerror(errno));
goto out;
}
total += done;
goto out;
}
- ret = decompress(inbuf, outbuf, disk_size, &ram_size, compress);
+ ret = decompress(root, inbuf, outbuf, disk_size, &ram_size, compress);
if (ret) {
num_copies = btrfs_num_copies(&root->fs_info->mapping_tree,
bytenr, length);
do {
ret = next_leaf(root, path);
if (ret < 0) {
- fprintf(stderr,
- "Error searching for extended attributes: %d\n",
+ error("searching for extended attributes: %d\n",
ret);
goto out;
} else if (ret) {
len);
data_len = len;
- if (fsetxattr(fd, name, data, data_len, 0)) {
- int err = errno;
-
- fprintf(stderr,
- "Error setting extended attribute %s on file %s: %s\n",
- name, file_name, strerror(err));
- }
+ if (fsetxattr(fd, name, data, data_len, 0))
+ error("setting extended attribute %s on file %s: %s",
+ name, file_name, strerror(errno));
len = sizeof(*di) + name_len + data_len;
cur += len;
path = btrfs_alloc_path();
if (!path) {
- fprintf(stderr, "ERROR: Ran out of memory\n");
+ error("not enough memory");
return -ENOMEM;
}
ret = fchown(fd, btrfs_inode_uid(path->nodes[0], inode_item),
btrfs_inode_gid(path->nodes[0], inode_item));
if (ret) {
- fprintf(stderr, "ERROR: Failed to change owner: %s\n",
- strerror(errno));
+ error("failed to change owner: %s", strerror(errno));
goto out;
}
ret = fchmod(fd, btrfs_inode_mode(path->nodes[0], inode_item));
if (ret) {
- fprintf(stderr, "ERROR: Failed to change mode: %s\n",
- strerror(errno));
+ error("failed to change mode: %s", strerror(errno));
goto out;
}
ret = futimens(fd, times);
if (ret) {
- fprintf(stderr, "ERROR: Failed to set times: %s\n",
- strerror(errno));
+ error("failed to set times: %s", strerror(errno));
goto out;
}
}
path = btrfs_alloc_path();
if (!path) {
- fprintf(stderr, "Ran out of memory\n");
+ error("not enough memory");
return -ENOMEM;
}
ret = btrfs_search_slot(NULL, root, key, path, 0, 0);
if (ret < 0) {
- fprintf(stderr, "Error searching %d\n", ret);
+ error("searching extent data returned %d", ret);
goto out;
}
while (!leaf) {
ret = next_leaf(root, path);
if (ret < 0) {
- fprintf(stderr, "Error getting next leaf %d\n",
- ret);
+ error("cannot get next leaf: %d", ret);
goto out;
} else if (ret > 0) {
/* No more leaves to search */
extent_type = btrfs_file_extent_type(leaf, fi);
compression = btrfs_file_extent_compression(leaf, fi);
if (compression >= BTRFS_COMPRESS_LAST) {
- fprintf(stderr, "Don't support compression yet %d\n",
+ warning("compression type %d not supported",
compression);
ret = -1;
goto out;
if (extent_type == BTRFS_FILE_EXTENT_PREALLOC)
goto next;
if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
- ret = copy_one_inline(fd, path, found_key.offset);
+ ret = copy_one_inline(root, fd, path, found_key.offset);
if (ret)
goto out;
} else if (extent_type == BTRFS_FILE_EXTENT_REG) {
if (ret)
goto out;
} else {
- printf("Weird extent type %d\n", extent_type);
+ warning("weird extent type %d", extent_type);
}
next:
path->slots[0]++;
return ret;
}
+/*
+ * returns:
+ * 0 if the file exists and should be skipped.
+ * 1 if the file does NOT exist
+ * 2 if the file exists but is OK to overwrite
+ */
+static int overwrite_ok(const char * path)
+{
+ static int warn = 0;
+ struct stat st;
+ int ret;
+
+ /* don't be fooled by symlinks */
+ ret = fstatat(-1, path_name, &st, AT_SYMLINK_NOFOLLOW);
+
+ if (!ret) {
+ if (overwrite)
+ return 2;
+
+ if (verbose || !warn)
+ printf("Skipping existing file"
+ " %s\n", path);
+ if (!warn)
+ printf("If you wish to overwrite use -o\n");
+ warn = 1;
+ return 0;
+ }
+ return 1;
+}
+
+static int copy_symlink(struct btrfs_root *root, struct btrfs_key *key,
+ const char *file)
+{
+ struct btrfs_path *path;
+ struct extent_buffer *leaf;
+ struct btrfs_file_extent_item *extent_item;
+ struct btrfs_inode_item *inode_item;
+ u32 len;
+ u32 name_offset;
+ int ret;
+ struct btrfs_timespec *bts;
+ struct timespec times[2];
+
+ ret = overwrite_ok(path_name);
+ if (ret == 0)
+ return 0; /* skip this file */
+
+ /* symlink() can't overwrite, so unlink first */
+ if (ret == 2) {
+ ret = unlink(path_name);
+ if (ret) {
+ fprintf(stderr, "failed to unlink '%s' for overwrite\n",
+ path_name);
+ return ret;
+ }
+ }
+
+ key->type = BTRFS_EXTENT_DATA_KEY;
+ key->offset = 0;
+
+ path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+
+ ret = btrfs_search_slot(NULL, root, key, path, 0, 0);
+ if (ret < 0)
+ goto out;
+
+ leaf = path->nodes[0];
+ if (!leaf) {
+ fprintf(stderr, "Error getting leaf for symlink '%s'\n", file);
+ ret = -1;
+ goto out;
+ }
+
+ extent_item = btrfs_item_ptr(leaf, path->slots[0],
+ struct btrfs_file_extent_item);
+
+ len = btrfs_file_extent_inline_item_len(leaf,
+ btrfs_item_nr(path->slots[0]));
+ if (len >= PATH_MAX) {
+ fprintf(stderr, "Symlink '%s' target length %d is longer than PATH_MAX\n",
+ fs_name, len);
+ ret = -1;
+ goto out;
+ }
+
+ name_offset = (unsigned long) extent_item
+ + offsetof(struct btrfs_file_extent_item, disk_bytenr);
+ read_extent_buffer(leaf, symlink_target, name_offset, len);
+
+ symlink_target[len] = 0;
+
+ 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));
+ goto out;
+ }
+ }
+ printf("SYMLINK: '%s' => '%s'\n", path_name, symlink_target);
+
+ ret = 0;
+ if (!restore_metadata)
+ goto out;
+
+ /*
+ * Symlink metadata operates differently than files/directories, so do
+ * our own work here.
+ */
+ key->type = BTRFS_INODE_ITEM_KEY;
+ key->offset = 0;
+
+ btrfs_release_path(path);
+
+ ret = btrfs_lookup_inode(NULL, root, path, key, 0);
+ if (ret) {
+ fprintf(stderr, "Failed to lookup inode for '%s'\n", file);
+ goto out;
+ }
+
+ inode_item = btrfs_item_ptr(path->nodes[0], path->slots[0],
+ struct btrfs_inode_item);
+
+ ret = fchownat(-1, file, btrfs_inode_uid(path->nodes[0], inode_item),
+ btrfs_inode_gid(path->nodes[0], inode_item),
+ AT_SYMLINK_NOFOLLOW);
+ if (ret) {
+ fprintf(stderr, "Failed to change owner: %s\n",
+ strerror(errno));
+ goto out;
+ }
+
+ bts = btrfs_inode_atime(inode_item);
+ times[0].tv_sec = btrfs_timespec_sec(path->nodes[0], bts);
+ times[0].tv_nsec = btrfs_timespec_nsec(path->nodes[0], bts);
+
+ bts = btrfs_inode_mtime(inode_item);
+ times[1].tv_sec = btrfs_timespec_sec(path->nodes[0], bts);
+ times[1].tv_nsec = btrfs_timespec_nsec(path->nodes[0], bts);
+
+ ret = utimensat(-1, file, times, AT_SYMLINK_NOFOLLOW);
+ if (ret)
+ fprintf(stderr, "Failed to set times: %s\n", strerror(errno));
+out:
+ btrfs_free_path(path);
+ return ret;
+}
+
static int search_dir(struct btrfs_root *root, struct btrfs_key *key,
const char *output_rootdir, const char *in_dir,
const regex_t *mreg)
goto out;
}
+ ret = 0;
+
leaf = path->nodes[0];
while (!leaf) {
if (verbose > 1)
snprintf(path_name, PATH_MAX, "%s%s", output_rootdir, fs_name);
/*
- * At this point we're only going to restore directories and
- * files, no symlinks or anything else.
+ * Restore directories, files, symlinks and metadata.
*/
if (type == BTRFS_FT_REG_FILE) {
- if (!overwrite) {
- static int warn = 0;
- struct stat st;
-
- ret = stat(path_name, &st);
- if (!ret) {
- loops = 0;
- if (verbose || !warn)
- printf("Skipping existing file"
- " %s\n", path_name);
- if (warn)
- goto next;
- printf("If you wish to overwrite use "
- "the -o option to overwrite\n");
- warn = 1;
- goto next;
- }
- ret = 0;
- }
+ if (!overwrite_ok(path_name))
+ goto next;
+
if (verbose)
printf("Restoring %s\n", path_name);
if (dry_run)
goto next;
goto out;
}
+ } else if (type == BTRFS_FT_SYMLINK) {
+ if (restore_symlinks)
+ ret = copy_symlink(root, &location, path_name);
+ if (ret < 0) {
+ if (ignore_errors)
+ goto next;
+ btrfs_free_path(path);
+ return ret;
+ }
}
next:
path->slots[0]++;
for (i = super_mirror; i < BTRFS_SUPER_MIRROR_MAX; i++) {
bytenr = btrfs_sb_offset(i);
- fs_info = open_ctree_fs_info(dev, bytenr, root_location,
+ fs_info = open_ctree_fs_info(dev, bytenr, root_location, 0,
OPEN_CTREE_PARTIAL);
if (fs_info)
break;
root_location = btrfs_super_root(fs_info->super_copy);
generation = btrfs_super_generation(fs_info->super_copy);
root->node = read_tree_block(root, root_location,
- root->leafsize, generation);
+ root->nodesize, generation);
if (!extent_buffer_uptodate(root->node)) {
fprintf(stderr, "Error opening tree root\n");
close_ctree(root);
"btrfs restore [options] <device> <path> | -l <device>",
"Try to restore files from a damaged filesystem (unmounted)",
"",
- "-s get snapshots",
- "-x get extended attributes",
- "-m|--metadata restore owner, mode and times",
- "-v verbose",
- "-i ignore errors",
- "-o overwrite",
- "-t <bytenr> tree location",
- "-f <bytenr> filesystem location",
- "-u <mirror> super mirror",
- "-r <rootid> root objectid",
- "-d find dir",
- "-l list tree roots",
- "-D|--dry-run dry run (only list files that would be recovered)",
+ "-s|--snapshots get snapshots",
+ "-x|--xattr get extended attributes",
+ "-m|--metadata restore owner, mode and times",
+ "-S|--symlinks restore symbolic links",
+ "-v|--verbose verbose",
+ "-i|--ignore-errors ignore errors",
+ "-o|--overwrite overwrite",
+ "-t <bytenr> tree location",
+ "-f <bytenr> filesystem location",
+ "-u|--super <mirror> super mirror",
+ "-r|--root <rootid> root objectid",
+ "-d find dir",
+ "-l|--list-roots list tree roots",
+ "-D|--dry-run dry run (only list files that would be recovered)",
"--path-regex <regex>",
- " restore only filenames matching regex,",
- " you have to use following syntax (possibly quoted):",
- " ^/(|home(|/username(|/Desktop(|/.*))))$",
- "-c ignore case (--path-regrex only)",
+ " restore only filenames matching regex,",
+ " you have to use following syntax (possibly quoted):",
+ " ^/(|home(|/username(|/Desktop(|/.*))))$",
+ "-c ignore case (--path-regex only)",
NULL
};
{
struct btrfs_root *root;
struct btrfs_key key;
- char dir_name[128];
+ char dir_name[PATH_MAX];
u64 tree_location = 0;
u64 fs_location = 0;
u64 root_objectid = 0;
{ "path-regex", required_argument, NULL, 256},
{ "dry-run", no_argument, NULL, 'D'},
{ "metadata", no_argument, NULL, 'm'},
+ { "symlinks", no_argument, NULL, 'S'},
+ { "snapshots", no_argument, NULL, 's'},
+ { "xattr", no_argument, NULL, 'x'},
+ { "verbose", no_argument, NULL, 'v'},
+ { "ignore-errors", no_argument, NULL, 'i'},
+ { "overwrite", no_argument, NULL, 'o'},
+ { "super", required_argument, NULL, 'u'},
+ { "root", required_argument, NULL, 'r'},
+ { "list-roots", no_argument, NULL, 'l'},
{ NULL, 0, NULL, 0}
};
- opt = getopt_long(argc, argv, "sxviot:u:dmf:r:lDc", long_options,
+ opt = getopt_long(argc, argv, "sSxviot:u:dmf:r:lDc", long_options,
NULL);
if (opt < 0)
break;
case 'm':
restore_metadata = 1;
break;
+ case 'S':
+ restore_symlinks = 1;
+ break;
case 'D':
dry_run = 1;
break;
if (fs_location != 0) {
free_extent_buffer(root->node);
- root->node = read_tree_block(root, fs_location, root->leafsize, 0);
+ root->node = read_tree_block(root, fs_location, root->nodesize, 0);
if (!extent_buffer_uptodate(root->node)) {
fprintf(stderr, "Failed to read fs location\n");
ret = 1;
memset(path_name, 0, PATH_MAX);
+ if (strlen(argv[optind + 1]) >= PATH_MAX) {
+ fprintf(stderr, "ERROR: path too long\n");
+ ret = 1;
+ goto out;
+ }
strncpy(dir_name, argv[optind + 1], sizeof dir_name);
dir_name[sizeof dir_name - 1] = 0;
projects / platform / upstream / btrfs-progs.git / blobdiff