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btrfs-progs/convert/source-reiserfs.c

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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License v2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*/
#if BTRFSCONVERT_REISERFS
#include "kerncompat.h"
#include <sys/stat.h>
#include <linux/fs.h>
#include <stdbool.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <limits.h>
#include <reiserfs/reiserfs_lib.h>
#include "kernel-lib/bitops.h"
#include "kernel-shared/disk-io.h"
#include "kernel-shared/transaction.h"
#include "kernel-shared/extent_io.h"
#include "kernel-shared/file-item.h"
#include "common/extent-cache.h"
#include "common/internal.h"
#include "common/messages.h"
#include "common/extent-tree-utils.h"
#include "convert/common.h"
#include "convert/source-reiserfs.h"
static inline u8 mode_to_file_type(u32 mode)
{
switch (mode & S_IFMT) {
case S_IFREG: return BTRFS_FT_REG_FILE;
case S_IFDIR: return BTRFS_FT_DIR;
case S_IFCHR: return BTRFS_FT_CHRDEV;
case S_IFBLK: return BTRFS_FT_BLKDEV;
case S_IFIFO: return BTRFS_FT_FIFO;
case S_IFSOCK: return BTRFS_FT_SOCK;
case S_IFLNK: return BTRFS_FT_SYMLINK;
};
return BTRFS_FT_UNKNOWN;
}
static u32 reiserfs_count_objectids(reiserfs_filsys_t fs)
{
struct reiserfs_super_block *sb = fs->fs_ondisk_sb;
u32 count = 0;
u32 *map;
int i;
if (fs->fs_format == REISERFS_FORMAT_3_6)
map = (u32 *) (sb + 1);
else
map = (u32 *)((struct reiserfs_super_block_v1 *)sb + 1);
for (i = 0; i < get_sb_oid_cursize(sb); i += 2)
count += le32_to_cpu(map[i + 1]) - (le32_to_cpu(map[i]) + 1);
return count;
}
static int reiserfs_open_fs(struct btrfs_convert_context *cxt, const char *name)
{
struct reiserfs_convert_info *info;
reiserfs_filsys_t fs;
long error;
fs = reiserfs_open(name, O_RDONLY, &error, NULL, 0);
if (!fs)
return -1;
error = reiserfs_open_ondisk_bitmap(fs);
if (error) {
reiserfs_close(fs);
return -1;
}
cxt->fs_data = fs;
cxt->blocksize = fs->fs_blocksize;
cxt->block_count = get_sb_block_count(fs->fs_ondisk_sb);
cxt->total_bytes = (u64)cxt->block_count * cxt->blocksize;
cxt->label = strndup(fs->fs_ondisk_sb->s_label, 16);
cxt->first_data_block = 0;
cxt->inodes_count = reiserfs_count_objectids(fs);
cxt->free_inodes_count = 0;
memcpy(cxt->fs_uuid, fs->fs_ondisk_sb->s_uuid, SOURCE_FS_UUID_SIZE);
info = calloc(1, sizeof(*info));
if (!info) {
reiserfs_close(fs);
return -1;
}
/*
* Inode attributes are somewhat of a hack on reiserfs and it was
* once possible to have garbage in the flags field. A superblock
* field now indicates that the field has been cleared and can
* be considered valid, but only on v3.6 format file systems.
*/
if (fs->fs_format == REISERFS_FORMAT_3_6 &&
get_sb_v2_flag(fs->fs_ondisk_sb, reiserfs_attrs_cleared))
info->copy_attrs = true;
fs->fs_vp = info;
return 0;
}
static void reiserfs_close_fs(struct btrfs_convert_context *cxt)
{
reiserfs_filsys_t fs = cxt->fs_data;
struct reiserfs_convert_info *info = fs->fs_vp;
if (info) {
if (info->objectids)
free(info->objectids);
free(info);
fs->fs_vp = NULL;
}
/* We don't want changes to be persistent */
fs->fs_bitmap2->bm_dirty = 0;
reiserfs_close(fs);
}
static int compare_objectids(const void *p1, const void *p2)
{
u64 v1 = *(u64 *)p1;
u64 v2 = *(u64 *)p2;
if (v1 > v2)
return 1;
else if (v1 < v2)
return -1;
return 0;
}
static int lookup_cached_objectid(reiserfs_filsys_t fs, u64 objectid)
{
struct reiserfs_convert_info *info = fs->fs_vp;
u64 *result;
if (!info->objectids)
return 0;
result = bsearch(&objectid, info->objectids, info->used_slots,
sizeof(u64), compare_objectids);
return result != NULL;
}
static int insert_cached_objectid(reiserfs_filsys_t fs, u64 objectid)
{
struct reiserfs_convert_info *info = fs->fs_vp;
if (info->used_slots + 1 >= info->alloced_slots) {
u64 *objectids = realloc(info->objectids,
(info->alloced_slots + 1000) * sizeof(u64));
if (!objectids)
return -ENOMEM;
info->objectids = objectids;
info->alloced_slots += 1000;
}
info->objectids[info->used_slots++] = objectid;
qsort(info->objectids, info->used_slots, sizeof(u64), compare_objectids);
return 0;
}
static int reiserfs_locate_privroot(reiserfs_filsys_t fs)
{
int err;
unsigned generation;
struct reiserfs_convert_info *info = fs->fs_vp;
struct reiserfs_key key = root_dir_key;
err = reiserfs_find_entry(fs, &key, ".reiserfs_priv",
&generation, &info->privroot_key);
if (err == 1) {
err = reiserfs_find_entry(fs, &info->privroot_key, "xattrs",
&generation, &info->xattr_key);
if (err != 1)
memset(&info->xattr_key, 0, sizeof(info->xattr_key));
}
return 0;
}
static void reiserfs_convert_inode_flags(struct btrfs_inode_item *inode,
const struct stat_data *sd)
{
u16 attrs = sd_v2_sd_attrs(sd);
u64 new_flags = 0;
if (attrs & FS_IMMUTABLE_FL)
new_flags |= BTRFS_INODE_IMMUTABLE;
if (attrs & FS_APPEND_FL)
new_flags |= BTRFS_INODE_APPEND;
if (attrs & FS_SYNC_FL)
new_flags |= BTRFS_INODE_SYNC;
if (attrs & FS_NOATIME_FL)
new_flags |= BTRFS_INODE_NOATIME;
if (attrs & FS_NODUMP_FL)
new_flags |= BTRFS_INODE_NODUMP;
if (attrs & FS_NODUMP_FL)
new_flags |= BTRFS_INODE_NODUMP;
btrfs_set_stack_inode_flags(inode, new_flags);
}
static void reiserfs_copy_inode_item(struct btrfs_inode_item *inode,
struct item_head *ih, void *stat_data,
bool copy_inode_flags)
{
u32 mode;
u32 rdev = 0;
memset(inode, 0, sizeof(*inode));
btrfs_set_stack_inode_generation(inode, 1);
if (get_ih_key_format(ih) == KEY_FORMAT_1) {
struct stat_data_v1 *sd = stat_data;
mode = sd_v1_mode(sd);
btrfs_set_stack_inode_size(inode, sd_v1_size(sd));
btrfs_set_stack_inode_nlink(inode, sd_v1_nlink(sd));
btrfs_set_stack_inode_uid(inode, sd_v1_uid(sd));
btrfs_set_stack_inode_gid(inode, sd_v1_gid(sd));
btrfs_set_stack_timespec_sec(&inode->atime, sd_v1_atime(sd));
btrfs_set_stack_timespec_sec(&inode->ctime, sd_v1_ctime(sd));
btrfs_set_stack_timespec_sec(&inode->mtime, sd_v1_mtime(sd));
if (!S_ISREG(mode) && !S_ISDIR(mode) && !S_ISLNK(mode))
rdev = decode_dev(sd_v1_rdev(sd));
} else {
struct stat_data *sd = stat_data;
mode = sd_v2_mode(sd);
btrfs_set_stack_inode_size(inode, sd_v2_size(sd));
btrfs_set_stack_inode_nlink(inode, sd_v2_nlink(sd));
btrfs_set_stack_inode_uid(inode, sd_v2_uid(sd));
btrfs_set_stack_inode_gid(inode, sd_v2_gid(sd));
btrfs_set_stack_timespec_sec(&inode->atime, sd_v2_atime(sd));
btrfs_set_stack_timespec_sec(&inode->ctime, sd_v2_ctime(sd));
btrfs_set_stack_timespec_sec(&inode->mtime, sd_v2_mtime(sd));
if (!S_ISREG(mode) && !S_ISDIR(mode) && !S_ISLNK(mode))
rdev = decode_dev(sd_v2_rdev(sd));
if (copy_inode_flags)
reiserfs_convert_inode_flags(inode, sd);
}
if (S_ISDIR(mode)) {
btrfs_set_stack_inode_size(inode, 0);
btrfs_set_stack_inode_nlink(inode, 1);
}
btrfs_set_stack_inode_mode(inode, mode);
btrfs_set_stack_inode_rdev(inode, rdev);
}
static void init_reiserfs_blk_iterate_data(
struct reiserfs_blk_iterate_data *data,
struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_inode_item *inode,
u64 objectid, u32 convert_flags)
{
init_blk_iterate_data(&data->blk_data, trans, root, inode, objectid,
convert_flags & CONVERT_FLAG_DATACSUM);
data->inline_data = NULL;
data->inline_offset = (u64)-1;
data->inline_length = 0;
}
static int reiserfs_record_indirect_extent(reiserfs_filsys_t fs, u64 position,
u64 size, int num_ptrs,
u32 *ptrs, void *data)
{
struct reiserfs_blk_iterate_data *bdata = data;
u32 file_block = position / fs->fs_blocksize;
int i;
int ret = 0;
for (i = 0; i < num_ptrs; i++, file_block++) {
u32 block = d32_get(ptrs, i);
ret = block_iterate_proc(block, file_block, &bdata->blk_data);
if (ret)
break;
}
return ret;
}
/*
* Unlike btrfs inline extents, reiserfs can have multiple inline extents.
* This handles concatenating multiple tails into one inline extent
* for insertion.
*/
static int reiserfs_record_direct_extent(reiserfs_filsys_t fs, __u64 position,
__u64 size, const char *body,
size_t len, void *data)
{
struct reiserfs_blk_iterate_data *bdata = data;
char *inline_data;
if (bdata->inline_offset == (u64)-1)
bdata->inline_offset = position;
else if (bdata->inline_offset + bdata->inline_length != position) {
/*
* This condition shouldn't actually happen, but better to
* catch it than break silently.
*/
error(
"source fs contains file with multiple tails but they are not contiguous");
return -EINVAL;
}
inline_data = realloc(bdata->inline_data, bdata->inline_length + len);
if (!inline_data)
return -ENOMEM;
bdata->inline_data = inline_data;
memcpy(bdata->inline_data + bdata->inline_length, body, len);
bdata->inline_length += len;
return 0;
}
static int convert_direct(struct btrfs_trans_handle *trans,
struct btrfs_root *root, u64 objectid,
struct btrfs_inode_item *inode, const char *body,
u32 length, u64 offset, u32 convert_flags)
{
struct btrfs_key key;
u32 sectorsize = root->fs_info->sectorsize;
int ret;
BUG_ON(length > sectorsize);
ret = btrfs_reserve_extent(trans, root, sectorsize,
0, 0, -1ULL, &key, 1);
if (ret)
return ret;
ret = write_data_to_disk(root->fs_info, body, key.objectid, sectorsize);
if (ret)
return ret;
return btrfs_record_file_extent(trans, root, objectid, inode, offset,
key.objectid, sectorsize);
}
static int reiserfs_convert_tail(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_inode_item *inode,
u64 objectid, u64 offset,
const void *body, unsigned length,
u32 convert_flags)
{
u64 isize;
int ret;
if (length >= BTRFS_MAX_INLINE_DATA_SIZE(root->fs_info) ||
length >= root->fs_info->sectorsize)
return convert_direct(trans, root, objectid, inode, body,
length, offset, convert_flags);
ret = btrfs_insert_inline_extent(trans, root, objectid,
offset, body, length);
if (ret)
return ret;
isize = btrfs_stack_inode_nbytes(inode);
btrfs_set_stack_inode_nbytes(inode, isize + length);
return 0;
}
static inline u32 block_count(u64 size, u32 blocksize)
{
return round_up(size, blocksize) / blocksize;
}
static int reiserfs_record_file_extents(reiserfs_filsys_t fs,
struct btrfs_trans_handle *trans,
struct btrfs_root *root,
u64 objectid,
struct btrfs_inode_item *inode,
struct reiserfs_key *sd_key,
u32 convert_flags)
{
int ret;
u32 blocksize = fs->fs_blocksize;
u64 inode_size = btrfs_stack_inode_size(inode);
u32 last_block;
struct reiserfs_blk_iterate_data data;
init_reiserfs_blk_iterate_data(&data, trans, root, inode,
objectid, convert_flags);
ret = reiserfs_iterate_file_data(fs, sd_key,
reiserfs_record_indirect_extent,
reiserfs_record_direct_extent, &data);
if (ret)
return ret;
/*
* blk_iterate_block has no idea that we're done iterating, so record
* the final range if any. This range can end and still have a tail
* after it.
*/
if (data.blk_data.num_blocks) {
ret = record_file_blocks(&data.blk_data,
data.blk_data.first_block,
data.blk_data.disk_block,
data.blk_data.num_blocks);
if (ret)
goto fail;
data.blk_data.first_block += data.blk_data.num_blocks;
data.blk_data.num_blocks = 0;
}
/*
* Handle a hole at the end of the file. ReiserFS will
* not write a tail followed by a hole but it will write a hole
* followed by a tail.
*/
last_block = block_count(inode_size - data.inline_length, blocksize);
if (last_block > data.blk_data.first_block) {
ret = record_file_blocks(&data.blk_data,
data.blk_data.first_block, 0,
last_block - data.blk_data.first_block);
if (ret)
goto fail;
}
if (data.inline_length) {
ret = reiserfs_convert_tail(trans, root, inode, objectid,
data.inline_offset,
data.inline_data,
data.inline_length, convert_flags);
if (ret)
goto fail;
}
ret = 0;
fail:
return ret;
}
static int reiserfs_copy_meta(reiserfs_filsys_t fs, struct btrfs_root *root,
u32 convert_flags, u32 deh_dirid,
u32 deh_objectid, u8 *type);
static int reiserfs_copy_dirent(reiserfs_filsys_t fs,
const struct reiserfs_key *dir_short_key,
const char *name, size_t len,
__u32 deh_dirid, __u32 deh_objectid,
void *cb_data)
{
int ret;
u8 type;
struct btrfs_trans_handle *trans;
u64 objectid = deh_objectid + OID_OFFSET;
struct reiserfs_convert_info *info = fs->fs_vp;
struct reiserfs_dirent_data *dirent_data = cb_data;
struct btrfs_root *root = dirent_data->root;
__u32 dir_objectid = get_key_objectid(dir_short_key) + OID_OFFSET;
/*
* These are the extended attributes and shouldn't appear as files
* in the converted file systems.
*/
if (deh_objectid == get_key_objectid(&info->privroot_key))
return 0;
ret = reiserfs_copy_meta(fs, root, dirent_data->convert_flags,
deh_dirid, deh_objectid, &type);
if (ret) {
errno = -ret;
error(
"an error occurred while converting \"%.*s\", reiserfs key [%u %u]: %m",
(int)len, name, deh_dirid, deh_objectid);
return ret;
}
trans = btrfs_start_transaction(root, 1);
if (IS_ERR(trans))
return PTR_ERR(trans);
ret = convert_insert_dirent(trans, root, name, len, dir_objectid,
objectid, type, dirent_data->index++,
dirent_data->inode);
return btrfs_commit_transaction(trans, root);
}
static int reiserfs_copy_symlink(struct btrfs_trans_handle *trans,
struct btrfs_root *root, u64 objectid,
struct btrfs_inode_item *btrfs_inode,
reiserfs_filsys_t fs,
struct reiserfs_path *sd_path)
{
INITIALIZE_REISERFS_PATH(path);
struct item_head *ih = tp_item_head(sd_path);
struct reiserfs_key key = ih->ih_key;
int ret;
char *symlink;
int len;
set_key_uniqueness(&key, type2uniqueness(TYPE_DIRECT));
set_key_offset_v1(&key, 1);
ret = reiserfs_search_by_key_3(fs, &key, &path);
if (ret != ITEM_FOUND) {
ret = -ENOENT;
goto fail;
}
symlink = tp_item_body(&path);
len = get_ih_item_len(tp_item_head(&path));
ret = btrfs_insert_inline_extent(trans, root, objectid, 0,
symlink, len + 1);
btrfs_set_stack_inode_nbytes(btrfs_inode, len + 1);
fail:
pathrelse(&path);
return ret;
}
static int reiserfs_copy_meta(reiserfs_filsys_t fs, struct btrfs_root *root,
u32 convert_flags, u32 deh_dirid,
u32 deh_objectid, u8 *type)
{
INITIALIZE_REISERFS_PATH(path);
int ret = 0;
struct item_head *ih;
struct reiserfs_key key;
struct btrfs_inode_item btrfs_inode;
struct btrfs_trans_handle *trans = NULL;
struct reiserfs_convert_info *info = fs->fs_vp;
u32 mode;
u64 objectid = deh_objectid + OID_OFFSET;
u64 parent = deh_dirid + OID_OFFSET;
struct reiserfs_dirent_data dirent_data = {
.index = 2,
.convert_flags = convert_flags,
.inode = &btrfs_inode,
.root = root,
};
/* The root directory's dirid in reiserfs points to an object
* that doesn't exist. In btrfs it's self-referential.
*/
if (deh_dirid == REISERFS_ROOT_PARENT_OBJECTID)
parent = objectid;
set_key_dirid(&key, deh_dirid);
set_key_objectid(&key, deh_objectid);
set_key_offset_v2(&key, 0);
set_key_type_v2(&key, TYPE_STAT_DATA);
ret = reiserfs_search_by_key_3(fs, &key, &path);
if (ret != ITEM_FOUND) {
ret = -ENOENT;
goto fail;
}
ih = tp_item_head(&path);
if (!is_stat_data_ih(ih)) {
ret = -EINVAL;
goto fail;
}
reiserfs_copy_inode_item(&btrfs_inode, ih, tp_item_body(&path),
info->copy_attrs);
mode = btrfs_stack_inode_mode(&btrfs_inode);
*type = mode_to_file_type(mode);
if (S_ISREG(mode)) {
/* Inodes with hardlinks should only be inserted once */
if (btrfs_stack_inode_nlink(&btrfs_inode) > 1) {
if (lookup_cached_objectid(fs, deh_objectid)) {
ret = 0;
goto fail; /* Not a failure */
}
ret = insert_cached_objectid(fs, deh_objectid);
if (ret)
goto fail;
}
}
if (!(convert_flags & CONVERT_FLAG_DATACSUM)) {
u32 flags = btrfs_stack_inode_flags(&btrfs_inode) |
BTRFS_INODE_NODATASUM;
btrfs_set_stack_inode_flags(&btrfs_inode, flags);
}
switch (mode & S_IFMT) {
case S_IFREG:
trans = btrfs_start_transaction(root, 1);
if (IS_ERR(trans)) {
ret = PTR_ERR(trans);
goto fail;
}
ret = reiserfs_record_file_extents(fs, trans, root, objectid,
&btrfs_inode, &ih->ih_key,
convert_flags);
if (ret)
goto fail;
break;
case S_IFDIR:
ret = reiserfs_iterate_dir(fs, &ih->ih_key,
reiserfs_copy_dirent, &dirent_data);
if (ret)
goto fail;
trans = btrfs_start_transaction(root, 1);
if (IS_ERR(trans)) {
ret = PTR_ERR(trans);
goto fail;
}
if (parent == objectid)
ret = btrfs_insert_inode_ref(trans, root, "..", 2, parent,
objectid, 0);
break;
case S_IFLNK:
trans = btrfs_start_transaction(root, 1);
if (IS_ERR(trans)) {
ret = PTR_ERR(trans);
goto fail;
}
ret = reiserfs_copy_symlink(trans, root, objectid,
&btrfs_inode, fs, &path);
if (ret)
goto fail;
break;
default:
trans = btrfs_start_transaction(root, 1);
if (IS_ERR(trans)) {
ret = PTR_ERR(trans);
goto fail;
}
}
ret = btrfs_insert_inode(trans, root, objectid, &btrfs_inode);
if (ret)
goto fail;
ret = btrfs_commit_transaction(trans, root);
info->progress->cur_copy_inodes++;
fail:
pathrelse(&path);
return ret;
}
static int reiserfs_xattr_indirect_fn(reiserfs_filsys_t fs, u64 position,
u64 size, int num_blocks,
u32 *blocks, void *data)
{
int i;
struct reiserfs_xattr_data *xa_data = data;
size_t alloc = min(position + num_blocks * fs->fs_blocksize, size);
char *body;
if (size > BTRFS_LEAF_DATA_SIZE(xa_data->root->fs_info) -
sizeof(struct btrfs_item) - sizeof(struct btrfs_dir_item)) {
error("skip large xattr on objectid %llu name %.*s",
xa_data->target_oid, (int)xa_data->namelen,
xa_data->name);
return -E2BIG;
}
body = realloc(xa_data->body, alloc);
if (!body)
return -ENOMEM;
xa_data->body = body;
xa_data->len = alloc;
for (i = 0; i < num_blocks; i++) {
int ret;
u32 block = d32_get(blocks, i);
u64 offset = (u64)block * fs->fs_blocksize;
size_t chunk = min_t(u64, size - position, fs->fs_blocksize);
char *buffer = xa_data->body + position;
ret = read_disk_extent(xa_data->root, offset, chunk, buffer);
if (ret)
return ret;
position += chunk;
}
return 0;
}
static int reiserfs_xattr_direct_fn(reiserfs_filsys_t fs, __u64 position,
__u64 size, const char *body, size_t len,
void *data)
{
struct reiserfs_xattr_data *xa_data = data;
char *newbody;
if (size > BTRFS_LEAF_DATA_SIZE(xa_data->root->fs_info) -
sizeof(struct btrfs_item) - sizeof(struct btrfs_dir_item)) {
error("skip large xattr on objectid %llu name %.*s",
xa_data->target_oid, (int)xa_data->namelen,
xa_data->name);
return -E2BIG;
}
newbody = realloc(xa_data->body, position + len);
if (!newbody)
return -ENOMEM;
xa_data->body = newbody;
xa_data->len = position + len;
memcpy(xa_data->body + position, body, len);
return 0;
}
static int reiserfs_acl_to_xattr(void *dst, const void *src,
size_t dst_size, size_t src_size)
{
int i, count;
const void *end = src + src_size;
acl_ea_header *ext_acl = (acl_ea_header *)dst;
acl_ea_entry *dst_entry = ext_acl->a_entries;
struct reiserfs_acl_entry *src_entry;
if (src_size < sizeof(struct reiserfs_acl_header))
goto fail;
if (((struct reiserfs_acl_header *)src)->a_version !=
cpu_to_le32(REISERFS_ACL_VERSION))
goto fail;
src += sizeof(struct reiserfs_acl_header);
count = reiserfs_acl_count(src_size);
if (count <= 0)
goto fail;
if (dst_size < acl_ea_size(count)) {
error("not enough space to store ACLs");
goto fail;
}
ext_acl->a_version = cpu_to_le32(ACL_EA_VERSION);
for (i = 0; i < count; i++, dst_entry++) {
src_entry = (struct reiserfs_acl_entry *)src;
if (src + sizeof(struct reiserfs_acl_entry_short) > end)
goto fail;
dst_entry->e_tag = src_entry->e_tag;
dst_entry->e_perm = src_entry->e_perm;
switch (le16_to_cpu(src_entry->e_tag)) {
case ACL_USER_OBJ:
case ACL_GROUP_OBJ:
case ACL_MASK:
case ACL_OTHER:
src += sizeof(struct reiserfs_acl_entry_short);
dst_entry->e_id = cpu_to_le32(ACL_UNDEFINED_ID);
break;
case ACL_USER:
case ACL_GROUP:
src += sizeof(struct reiserfs_acl_entry);
if (src > end)
goto fail;
dst_entry->e_id = src_entry->e_id;
break;
default:
goto fail;
}
}
if (src != end)
goto fail;
return 0;
fail:
return -EINVAL;
}
static int reiserfs_copy_one_xattr(reiserfs_filsys_t fs,
const struct reiserfs_key *dir_short_key,
const char *name, size_t namelen,
__u32 deh_dirid,
__u32 deh_objectid, void *cb_data)
{
struct reiserfs_convert_info *info = fs->fs_vp;
struct reiserfs_xattr_data *xa_data = cb_data;
struct reiserfs_key key = {
.k2_dir_id = deh_dirid,
.k2_objectid = deh_objectid,
};
void *body = NULL;
int len;
int ret;
xa_data->name = name;
xa_data->namelen = namelen;
ret = reiserfs_iterate_file_data(fs, &key, reiserfs_xattr_indirect_fn,
reiserfs_xattr_direct_fn, cb_data);
if (ret)
goto out;
if (!reiserfs_check_xattr(xa_data->body, xa_data->len)) {
error("skip corrupted xattr on objectid %u name %.*s",
deh_objectid, (int)xa_data->namelen,
xa_data->name);
goto out;
}
body = xa_data->body + sizeof(struct reiserfs_xattr_header);
len = xa_data->len - sizeof(struct reiserfs_xattr_header);
if (!strncmp("system.posix_acl_default", name, namelen) ||
!strncmp("system.posix_acl_access", name, namelen)) {
size_t bufsize = acl_ea_size(ext2_acl_count(len));
char *databuf = malloc(bufsize);
if (!databuf)
goto out;
ret = reiserfs_acl_to_xattr(databuf, body, bufsize, len);
if (ret)
goto out;
body = databuf;
len = bufsize;
}
ret = btrfs_insert_xattr_item(xa_data->trans, xa_data->root,
name, namelen, body, len,
xa_data->target_oid);
info->progress->cur_copy_inodes++;
out:
if (body &&
body != xa_data->body + sizeof(struct reiserfs_xattr_header))
free(body);
if (xa_data->body)
free(xa_data->body);
xa_data->body = NULL;
xa_data->len = 0;
return ret;
}
static int reiserfs_copy_xattr_dir(reiserfs_filsys_t fs,
const struct reiserfs_key *dir_short_key,
const char *name, size_t len,
__u32 deh_dirid, __u32 deh_objectid,
void *cb_data)
{
struct reiserfs_convert_info *info = fs->fs_vp;
struct reiserfs_xattr_data *xa_data = cb_data;
struct reiserfs_key dir_key = {
.k2_dir_id = deh_dirid,
.k2_objectid = deh_objectid,
};
int ret, err;
errno = 0;
xa_data->target_oid = strtoull(name, NULL, 16);
if (xa_data->target_oid == ULLONG_MAX && errno)
return -errno;
xa_data->target_oid += OID_OFFSET;
xa_data->trans = btrfs_start_transaction(xa_data->root, 1);
if (IS_ERR(xa_data->trans))
return PTR_ERR(xa_data->trans);
ret = reiserfs_iterate_dir(fs, &dir_key,
reiserfs_copy_one_xattr, xa_data);
err = btrfs_commit_transaction(xa_data->trans, xa_data->root);
info->progress->cur_copy_inodes++;
xa_data->trans = NULL;
return ret ?: err;
}
static int reiserfs_copy_xattrs(reiserfs_filsys_t fs, struct btrfs_root *root)
{
struct reiserfs_convert_info *info = fs->fs_vp;
struct reiserfs_xattr_data data = {
.root = root,
};
if (get_key_objectid(&info->xattr_key) == 0)
return 0;
return reiserfs_iterate_dir(fs, &info->xattr_key,
reiserfs_copy_xattr_dir, &data);
}
static int reiserfs_copy_inodes(struct btrfs_convert_context *cxt,
struct btrfs_root *root,
u32 convert_flags,
struct task_ctx *p)
{
reiserfs_filsys_t fs = cxt->fs_data;
struct reiserfs_convert_info *info = fs->fs_vp;
int ret;
u8 type;
info->progress = p;
ret = reiserfs_locate_privroot(fs);
if (ret)
goto out;
ret = reiserfs_copy_meta(fs, root, convert_flags,
REISERFS_ROOT_PARENT_OBJECTID,
REISERFS_ROOT_OBJECTID, &type);
if (ret)
goto out;
if (convert_flags & CONVERT_FLAG_XATTR)
ret = reiserfs_copy_xattrs(fs, root);
out:
info->progress = NULL;
return ret;
}
static int reiserfs_read_used_space(struct btrfs_convert_context *cxt)
{
reiserfs_filsys_t fs = cxt->fs_data;
u64 start, end = 0;
unsigned int size = get_sb_block_count(fs->fs_ondisk_sb);
unsigned long *bitmap = (unsigned long *)fs->fs_bitmap2->bm_map;
int ret = 0;
/*
* We have the entire bitmap loaded so we can just ping pong with
* ffz and ffs
*/
while (end < size) {
u64 offset, length;
start = find_next_bit(bitmap, size, end);
if (start >= size)
break;
end = find_next_zero_bit(bitmap, size, start);
if (end > size)
end = size;
offset = start * fs->fs_blocksize;
length = (end - start) * fs->fs_blocksize;
ret = add_merge_cache_extent(&cxt->used_space, offset, length);
if (ret < 0)
break;
}
return ret;
}
static int reiserfs_check_state(struct btrfs_convert_context *cxt)
{
return 0;
}
const struct btrfs_convert_operations reiserfs_convert_ops = {
.name = "reiserfs",
.open_fs = reiserfs_open_fs,
.read_used_space = reiserfs_read_used_space,
.copy_inodes = reiserfs_copy_inodes,
.close_fs = reiserfs_close_fs,
.check_state = reiserfs_check_state,
};
#endif /* BTRFSCONVERT_REISERFS */
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