#include "kerncompat.h"
-#ifndef __CHECKER__
#include <sys/ioctl.h>
#include <sys/mount.h>
-#endif
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>
#include <uuid/uuid.h>
-#include <linux/fs.h>
#include "ctree.h"
#include "disk-io.h"
return intersect_with_sb(bytenr, num_bytes);
}
-struct btrfs_extent_ops extent_ops = {
+static struct btrfs_extent_ops extent_ops = {
.alloc_extent = custom_alloc_extent,
.free_extent = custom_free_extent,
};
ret = -1;
return ret;
}
-/*
- * Record a file extent. Do all the required works, such as inserting
- * file extent item, inserting extent item and backref item into extent
- * tree and updating block accounting.
- */
-static int record_file_extent(struct btrfs_trans_handle *trans,
- struct btrfs_root *root, u64 objectid,
- struct btrfs_inode_item *inode,
- u64 file_pos, u64 disk_bytenr,
- u64 num_bytes, int checksum)
+
+static int csum_disk_extent(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ u64 disk_bytenr, u64 num_bytes)
{
- int ret;
- struct btrfs_fs_info *info = root->fs_info;
- struct btrfs_root *extent_root = info->extent_root;
- struct extent_buffer *leaf;
- struct btrfs_file_extent_item *fi;
- struct btrfs_key ins_key;
- struct btrfs_path path;
- struct btrfs_extent_item *ei;
u32 blocksize = root->sectorsize;
- u64 nbytes;
-
- if (disk_bytenr == 0) {
- ret = btrfs_insert_file_extent(trans, root, objectid,
- file_pos, disk_bytenr,
- num_bytes, num_bytes);
- return ret;
- }
-
- btrfs_init_path(&path);
-
- if (checksum) {
- u64 offset;
- char *buffer;
+ u64 offset;
+ char *buffer;
+ int ret = 0;
- ret = -ENOMEM;
- buffer = malloc(blocksize);
- if (!buffer)
- goto fail;
- for (offset = 0; offset < num_bytes; offset += blocksize) {
- ret = read_disk_extent(root, disk_bytenr + offset,
- blocksize, buffer);
- if (ret)
- break;
- ret = btrfs_csum_file_block(trans,
- root->fs_info->csum_root,
- disk_bytenr + num_bytes,
- disk_bytenr + offset,
- buffer, blocksize);
- if (ret)
- break;
- }
- free(buffer);
+ buffer = malloc(blocksize);
+ if (!buffer)
+ return -ENOMEM;
+ for (offset = 0; offset < num_bytes; offset += blocksize) {
+ ret = read_disk_extent(root, disk_bytenr + offset,
+ blocksize, buffer);
if (ret)
- goto fail;
- }
-
- ins_key.objectid = objectid;
- ins_key.offset = file_pos;
- btrfs_set_key_type(&ins_key, BTRFS_EXTENT_DATA_KEY);
- ret = btrfs_insert_empty_item(trans, root, &path, &ins_key,
- sizeof(*fi));
- if (ret)
- goto fail;
- leaf = path.nodes[0];
- fi = btrfs_item_ptr(leaf, path.slots[0],
- struct btrfs_file_extent_item);
- btrfs_set_file_extent_generation(leaf, fi, trans->transid);
- btrfs_set_file_extent_type(leaf, fi, BTRFS_FILE_EXTENT_REG);
- btrfs_set_file_extent_disk_bytenr(leaf, fi, disk_bytenr);
- btrfs_set_file_extent_disk_num_bytes(leaf, fi, num_bytes);
- btrfs_set_file_extent_offset(leaf, fi, 0);
- btrfs_set_file_extent_num_bytes(leaf, fi, num_bytes);
- btrfs_set_file_extent_ram_bytes(leaf, fi, num_bytes);
- btrfs_set_file_extent_compression(leaf, fi, 0);
- btrfs_set_file_extent_encryption(leaf, fi, 0);
- btrfs_set_file_extent_other_encoding(leaf, fi, 0);
- btrfs_mark_buffer_dirty(leaf);
-
- nbytes = btrfs_stack_inode_nbytes(inode) + num_bytes;
- btrfs_set_stack_inode_nbytes(inode, nbytes);
-
- btrfs_release_path(&path);
-
- ins_key.objectid = disk_bytenr;
- ins_key.offset = num_bytes;
- ins_key.type = BTRFS_EXTENT_ITEM_KEY;
-
- ret = btrfs_insert_empty_item(trans, extent_root, &path,
- &ins_key, sizeof(*ei));
- if (ret == 0) {
- leaf = path.nodes[0];
- ei = btrfs_item_ptr(leaf, path.slots[0],
- struct btrfs_extent_item);
-
- btrfs_set_extent_refs(leaf, ei, 0);
- btrfs_set_extent_generation(leaf, ei, 0);
- btrfs_set_extent_flags(leaf, ei, BTRFS_EXTENT_FLAG_DATA);
-
- btrfs_mark_buffer_dirty(leaf);
-
- ret = btrfs_update_block_group(trans, root, disk_bytenr,
- num_bytes, 1, 0);
+ break;
+ ret = btrfs_csum_file_block(trans,
+ root->fs_info->csum_root,
+ disk_bytenr + num_bytes,
+ disk_bytenr + offset,
+ buffer, blocksize);
if (ret)
- goto fail;
- } else if (ret != -EEXIST) {
- goto fail;
+ break;
}
- btrfs_extent_post_op(trans, extent_root);
-
- ret = btrfs_inc_extent_ref(trans, root, disk_bytenr, num_bytes, 0,
- root->root_key.objectid,
- objectid, file_pos);
- if (ret)
- goto fail;
- ret = 0;
-fail:
- btrfs_release_path(&path);
+ free(buffer);
return ret;
}
u64 file_block, u64 disk_block,
u64 num_blocks, int checksum)
{
+ int ret;
u64 file_pos = file_block * root->sectorsize;
u64 disk_bytenr = disk_block * root->sectorsize;
u64 num_bytes = num_blocks * root->sectorsize;
- return record_file_extent(trans, root, objectid, inode, file_pos,
- disk_bytenr, num_bytes, checksum);
+ ret = btrfs_record_file_extent(trans, root, objectid, inode, file_pos,
+ disk_bytenr, num_bytes);
+
+ if (ret || !checksum)
+ return ret;
+
+ return csum_disk_extent(trans, root, disk_bytenr, num_bytes);
}
struct blk_iterate_data {
data.first_block, data.checksum);
}
fail:
- if (buffer)
- free(buffer);
+ free(buffer);
return ret;
error:
fprintf(stderr, "ext2fs_block_iterate2: %s\n", error_message(err));
ret = btrfs_insert_xattr_item(trans, root, namebuf, name_len,
data, datalen, objectid);
out:
- if (databuf)
- free(databuf);
+ free(databuf);
return ret;
}
entry = EXT2_EXT_ATTR_NEXT(entry);
}
out:
- if (buffer != NULL)
- free(buffer);
+ free(buffer);
if ((void *)ext2_inode != inode_buf)
free(ext2_inode);
return ret;
sectorsize);
if (ret)
goto fail;
- ret = record_file_extent(trans, root, objectid,
- &btrfs_inode, last_byte,
- key.objectid, sectorsize, 0);
+ ret = btrfs_record_file_extent(trans, root, objectid,
+ &btrfs_inode, last_byte,
+ key.objectid, sectorsize);
if (ret)
goto fail;
}
if (ret)
goto fail;
}
- ret = record_file_extent(trans, root, objectid, &btrfs_inode,
- bytenr, bytenr, num_bytes, 0);
+ ret = btrfs_record_file_extent(trans, root, objectid,
+ &btrfs_inode, bytenr, bytenr,
+ num_bytes);
if (ret)
goto fail;
last_byte = bytenr + num_bytes;
return ret;
}
-struct btrfs_root *link_subvol(struct btrfs_root *root, const char *base,
- u64 root_objectid)
+static struct btrfs_root * link_subvol(struct btrfs_root *root,
+ const char *base, u64 root_objectid)
{
struct btrfs_trans_handle *trans;
struct btrfs_fs_info *fs_info = root->fs_info;
struct btrfs_key key;
u64 dirid = btrfs_root_dirid(&root->root_item);
u64 index = 2;
- char buf[64];
+ char buf[BTRFS_NAME_LEN + 1]; /* for snprintf null */
+ int len;
int i;
int ret;
+ len = strlen(base);
+ if (len < 1 || len > BTRFS_NAME_LEN)
+ return NULL;
+
path = btrfs_alloc_path();
BUG_ON(!path);
key.offset = (u64)-1;
key.type = BTRFS_ROOT_ITEM_KEY;
- strcpy(buf, base);
+ memcpy(buf, base, len);
for (i = 0; i < 1024; i++) {
- ret = btrfs_insert_dir_item(trans, root, buf, strlen(buf),
+ ret = btrfs_insert_dir_item(trans, root, buf, len,
dirid, &key, BTRFS_FT_DIR, index);
if (ret != -EEXIST)
break;
- sprintf(buf, "%s%d", base, i);
+ len = snprintf(buf, ARRAY_SIZE(buf), "%s%d", base, i);
+ if (len < 1 || len > BTRFS_NAME_LEN) {
+ ret = -EINVAL;
+ break;
+ }
}
if (ret)
goto fail;
- btrfs_set_inode_size(leaf, inode_item, strlen(buf) * 2 +
+ btrfs_set_inode_size(leaf, inode_item, len * 2 +
btrfs_inode_size(leaf, inode_item));
btrfs_mark_buffer_dirty(leaf);
btrfs_release_path(path);
ret = btrfs_add_root_ref(trans, tree_root, root_objectid,
BTRFS_ROOT_BACKREF_KEY,
root->root_key.objectid,
- dirid, index, buf, strlen(buf));
+ dirid, index, buf, len);
BUG_ON(ret);
/* now add the forward ref */
ret = btrfs_add_root_ref(trans, tree_root, root->root_key.objectid,
BTRFS_ROOT_REF_KEY, root_objectid,
- dirid, index, buf, strlen(buf));
+ dirid, index, buf, len);
ret = btrfs_commit_transaction(trans, root);
BUG_ON(ret);
ret = create_subvol(trans, root, BTRFS_DATA_RELOC_TREE_OBJECTID);
BUG_ON(ret);
+ extent_buffer_get(fs_info->csum_root->node);
ret = __btrfs_cow_block(trans, fs_info->csum_root,
fs_info->csum_root->node, NULL, 0, &tmp, 0, 0);
BUG_ON(ret);
return ret;
}
-int do_convert(const char *devname, int datacsum, int packing, int noxattr)
+static int do_convert(const char *devname, int datacsum, int packing,
+ int noxattr)
{
int i, ret;
int fd = -1;
}
ret = make_btrfs(fd, devname, ext2_fs->super->s_volume_name,
blocks, total_bytes, blocksize, blocksize,
- blocksize, blocksize);
+ blocksize, blocksize, 0);
if (ret) {
fprintf(stderr, "unable to create initial ctree: %s\n",
strerror(-ret));
fprintf(stderr, "unable to update system chunk\n");
goto fail;
}
- root = open_ctree_fd(fd, devname, super_bytenr, O_RDWR);
+ root = open_ctree_fd(fd, devname, super_bytenr, OPEN_CTREE_WRITES);
if (!root) {
fprintf(stderr, "unable to open ctree\n");
goto fail;
goto fail;
}
- root = open_ctree_fd(fd, devname, 0, O_RDWR);
+ root = open_ctree_fd(fd, devname, 0, OPEN_CTREE_WRITES);
if (!root) {
fprintf(stderr, "unable to open ctree\n");
goto fail;
return -1;
}
-int do_rollback(const char *devname, int force)
+static int do_rollback(const char *devname, int force)
{
int fd = -1;
int ret;
fprintf(stderr, "unable to open %s\n", devname);
goto fail;
}
- root = open_ctree_fd(fd, devname, 0, O_RDWR);
+ root = open_ctree_fd(fd, devname, 0, OPEN_CTREE_WRITES);
if (!root) {
fprintf(stderr, "unable to open ctree\n");
goto fail;
projects / platform / upstream / btrfs-progs.git / blobdiff