static int do_setxattr(struct btrfs_trans_handle *trans,
struct inode *inode, const char *name,
const void *value, size_t size, int flags)
{
struct btrfs_dir_item *di = NULL;
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_path *path;
size_t name_len = strlen(name);
int ret = 0;
if (name_len + size > BTRFS_MAX_XATTR_SIZE(root))
return -ENOSPC;
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
path->skip_release_on_error = 1;
if (!value) {
di = btrfs_lookup_xattr(trans, root, path, btrfs_ino(inode),
name, name_len, -1);
if (!di && (flags & XATTR_REPLACE))
ret = -ENODATA;
else if (IS_ERR(di))
ret = PTR_ERR(di);
else if (di)
ret = btrfs_delete_one_dir_name(trans, root, path, di);
goto out;
}
/*
* For a replace we can't just do the insert blindly.
* Do a lookup first (read-only btrfs_search_slot), and return if xattr
* doesn't exist. If it exists, fall down below to the insert/replace
* path - we can't race with a concurrent xattr delete, because the VFS
* locks the inode's i_mutex before calling setxattr or removexattr.
*/
if (flags & XATTR_REPLACE) {
ASSERT(inode_is_locked(inode));
di = btrfs_lookup_xattr(NULL, root, path, btrfs_ino(inode),
name, name_len, 0);
if (!di)
ret = -ENODATA;
else if (IS_ERR(di))
ret = PTR_ERR(di);
if (ret)
goto out;
btrfs_release_path(path);
di = NULL;
}
ret = btrfs_insert_xattr_item(trans, root, path, btrfs_ino(inode),
name, name_len, value, size);
if (ret == -EOVERFLOW) {
/*
* We have an existing item in a leaf, split_leaf couldn't
* expand it. That item might have or not a dir_item that
* matches our target xattr, so lets check.
*/
ret = 0;
btrfs_assert_tree_locked(path->nodes[0]);
di = btrfs_match_dir_item_name(root, path, name, name_len);
if (!di && !(flags & XATTR_REPLACE)) {
ret = -ENOSPC;
goto out;
}
} else if (ret == -EEXIST) {
ret = 0;
di = btrfs_match_dir_item_name(root, path, name, name_len);
ASSERT(di); /* logic error */
} else if (ret) {
goto out;
}
if (di && (flags & XATTR_CREATE)) {
ret = -EEXIST;
goto out;
}
if (di) {
/*
* We're doing a replace, and it must be atomic, that is, at
* any point in time we have either the old or the new xattr
* value in the tree. We don't want readers (getxattr and
* listxattrs) to miss a value, this is specially important
* for ACLs.
*/
const int slot = path->slots[0];
struct extent_buffer *leaf = path->nodes[0];
const u16 old_data_len = btrfs_dir_data_len(leaf, di);
const u32 item_size = btrfs_item_size_nr(leaf, slot);
const u32 data_size = sizeof(*di) + name_len + size;
struct btrfs_item *item;
unsigned long data_ptr;
char *ptr;
if (size > old_data_len) {
if (btrfs_leaf_free_space(root, leaf) <
(size - old_data_len)) {
ret = -ENOSPC;
goto out;
}
}
if (old_data_len + name_len + sizeof(*di) == item_size) {
/* No other xattrs packed in the same leaf item. */
if (size > old_data_len)
btrfs_extend_item(root, path,
size - old_data_len);
else if (size < old_data_len)
btrfs_truncate_item(root, path, data_size, 1);
} else {
/* There are other xattrs packed in the same item. */
ret = btrfs_delete_one_dir_name(trans, root, path, di);
if (ret)
goto out;
btrfs_extend_item(root, path, data_size);
}
item = btrfs_item_nr(slot);
ptr = btrfs_item_ptr(leaf, slot, char);
ptr += btrfs_item_size(leaf, item) - data_size;
di = (struct btrfs_dir_item *)ptr;
btrfs_set_dir_data_len(leaf, di, size);
data_ptr = ((unsigned long)(di + 1)) + name_len;
write_extent_buffer(leaf, value, data_ptr, size);
btrfs_mark_buffer_dirty(leaf);
} else {
/*
* Insert, and we had space for the xattr, so path->slots[0] is
* where our xattr dir_item is and btrfs_insert_xattr_item()
* filled it.
*/
}
void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
{
int i;
char *str;
struct btrfs_item *item;
struct btrfs_dir_item *di;
struct btrfs_inode_item *ii;
struct btrfs_file_extent_item *fi;
struct btrfs_block_group_item *bi;
struct btrfs_extent_data_ref *dref;
struct btrfs_shared_data_ref *sref;
struct btrfs_inode_ref *iref;
struct btrfs_inode_extref *iref2;
struct btrfs_dev_extent *dev_extent;
struct btrfs_disk_key disk_key;
struct btrfs_block_group_item bg_item;
struct btrfs_dir_log_item *dlog;
struct btrfs_qgroup_info_item *qg_info;
struct btrfs_qgroup_limit_item *qg_limit;
struct btrfs_qgroup_status_item *qg_status;
u32 nr = btrfs_header_nritems(l);
u64 objectid;
u32 type;
printf("leaf %llu items %d free space %d generation %llu owner %llu\n",
(unsigned long long)btrfs_header_bytenr(l), nr,
btrfs_leaf_free_space(root, l),
(unsigned long long)btrfs_header_generation(l),
(unsigned long long)btrfs_header_owner(l));
print_uuids(l);
fflush(stdout);
for (i = 0 ; i < nr ; i++) {
item = btrfs_item_nr(l, i);
btrfs_item_key(l, &disk_key, i);
objectid = btrfs_disk_key_objectid(&disk_key);
type = btrfs_disk_key_type(&disk_key);
printf("\titem %d ", i);
btrfs_print_key(&disk_key);
printf(" itemoff %d itemsize %d\n",
btrfs_item_offset(l, item),
btrfs_item_size(l, item));
if (type == 0 && objectid == BTRFS_FREE_SPACE_OBJECTID)
print_free_space_header(l, i);
switch (type) {
case BTRFS_INODE_ITEM_KEY:
ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
printf("\t\tinode generation %llu transid %llu size %llu block group %llu mode %o links %u\n",
(unsigned long long)btrfs_inode_generation(l, ii),
(unsigned long long)btrfs_inode_transid(l, ii),
(unsigned long long)btrfs_inode_size(l, ii),
(unsigned long long)btrfs_inode_block_group(l,ii),
btrfs_inode_mode(l, ii),
btrfs_inode_nlink(l, ii));
break;
case BTRFS_INODE_REF_KEY:
iref = btrfs_item_ptr(l, i, struct btrfs_inode_ref);
print_inode_ref_item(l, item, iref);
break;
case BTRFS_INODE_EXTREF_KEY:
iref2 = btrfs_item_ptr(l, i, struct btrfs_inode_extref);
print_inode_extref_item(l, item, iref2);
break;
case BTRFS_DIR_ITEM_KEY:
case BTRFS_DIR_INDEX_KEY:
case BTRFS_XATTR_ITEM_KEY:
di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
print_dir_item(l, item, di);
break;
case BTRFS_DIR_LOG_INDEX_KEY:
case BTRFS_DIR_LOG_ITEM_KEY:
dlog = btrfs_item_ptr(l, i, struct btrfs_dir_log_item);
printf("\t\tdir log end %Lu\n",
(unsigned long long)btrfs_dir_log_end(l, dlog));
break;
case BTRFS_ORPHAN_ITEM_KEY:
printf("\t\torphan item\n");
break;
case BTRFS_ROOT_ITEM_KEY:
print_root(l, i);
break;
case BTRFS_ROOT_REF_KEY:
print_root_ref(l, i, "ref");
break;
case BTRFS_ROOT_BACKREF_KEY:
print_root_ref(l, i, "backref");
break;
case BTRFS_EXTENT_ITEM_KEY:
print_extent_item(l, i, 0);
break;
case BTRFS_METADATA_ITEM_KEY:
print_extent_item(l, i, 1);
break;
case BTRFS_TREE_BLOCK_REF_KEY:
printf("\t\ttree block backref\n");
break;
case BTRFS_SHARED_BLOCK_REF_KEY:
printf("\t\tshared block backref\n");
break;
case BTRFS_EXTENT_DATA_REF_KEY:
dref = btrfs_item_ptr(l, i, struct btrfs_extent_data_ref);
printf("\t\textent data backref root %llu "
"objectid %llu offset %llu count %u\n",
(unsigned long long)btrfs_extent_data_ref_root(l, dref),
(unsigned long long)btrfs_extent_data_ref_objectid(l, dref),
(unsigned long long)btrfs_extent_data_ref_offset(l, dref),
btrfs_extent_data_ref_count(l, dref));
break;
case BTRFS_SHARED_DATA_REF_KEY:
sref = btrfs_item_ptr(l, i, struct btrfs_shared_data_ref);
printf("\t\tshared data backref count %u\n",
btrfs_shared_data_ref_count(l, sref));
break;
case BTRFS_EXTENT_REF_V0_KEY:
#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
print_extent_ref_v0(l, i);
#else
BUG();
#endif
break;
case BTRFS_CSUM_ITEM_KEY:
printf("\t\tcsum item\n");
break;
case BTRFS_EXTENT_CSUM_KEY:
printf("\t\textent csum item\n");
break;
case BTRFS_EXTENT_DATA_KEY:
fi = btrfs_item_ptr(l, i,
struct btrfs_file_extent_item);
print_file_extent_item(l, item, fi);
break;
case BTRFS_BLOCK_GROUP_ITEM_KEY:
bi = btrfs_item_ptr(l, i,
struct btrfs_block_group_item);
read_extent_buffer(l, &bg_item, (unsigned long)bi,
sizeof(bg_item));
printf("\t\tblock group used %llu chunk_objectid %llu flags %llu\n",
(unsigned long long)btrfs_block_group_used(&bg_item),
(unsigned long long)btrfs_block_group_chunk_objectid(&bg_item),
(unsigned long long)btrfs_block_group_flags(&bg_item));
break;
case BTRFS_CHUNK_ITEM_KEY:
print_chunk(l, btrfs_item_ptr(l, i, struct btrfs_chunk));
break;
case BTRFS_DEV_ITEM_KEY:
print_dev_item(l, btrfs_item_ptr(l, i,
struct btrfs_dev_item));
break;
case BTRFS_DEV_EXTENT_KEY:
dev_extent = btrfs_item_ptr(l, i,
struct btrfs_dev_extent);
printf("\t\tdev extent chunk_tree %llu\n"
"\t\tchunk objectid %llu chunk offset %llu "
"length %llu\n",
(unsigned long long)
btrfs_dev_extent_chunk_tree(l, dev_extent),
(unsigned long long)
btrfs_dev_extent_chunk_objectid(l, dev_extent),
(unsigned long long)
btrfs_dev_extent_chunk_offset(l, dev_extent),
(unsigned long long)
btrfs_dev_extent_length(l, dev_extent));
break;
case BTRFS_QGROUP_STATUS_KEY:
qg_status = btrfs_item_ptr(l, i,
struct btrfs_qgroup_status_item);
printf("\t\tversion %llu generation %llu flags %#llx "
"scan %lld\n",
(unsigned long long)
btrfs_qgroup_status_version(l, qg_status),
(unsigned long long)
btrfs_qgroup_status_generation(l, qg_status),
(unsigned long long)
btrfs_qgroup_status_flags(l, qg_status),
(unsigned long long)
btrfs_qgroup_status_scan(l, qg_status));
break;
case BTRFS_QGROUP_RELATION_KEY:
break;
case BTRFS_QGROUP_INFO_KEY:
qg_info = btrfs_item_ptr(l, i,
struct btrfs_qgroup_info_item);
printf("\t\tgeneration %llu\n"
"\t\treferenced %lld referenced compressed %lld\n"
"\t\texclusive %lld exclusive compressed %lld\n",
(unsigned long long)
btrfs_qgroup_info_generation(l, qg_info),
(long long)
btrfs_qgroup_info_referenced(l, qg_info),
(long long)
btrfs_qgroup_info_referenced_compressed(l,
qg_info),
(long long)
btrfs_qgroup_info_exclusive(l, qg_info),
(long long)
btrfs_qgroup_info_exclusive_compressed(l,
qg_info));
break;
case BTRFS_QGROUP_LIMIT_KEY:
qg_limit = btrfs_item_ptr(l, i,
struct btrfs_qgroup_limit_item);
printf("\t\tflags %llx\n"
"\t\tmax referenced %lld max exclusive %lld\n"
"\t\trsv referenced %lld rsv exclusive %lld\n",
(unsigned long long)
btrfs_qgroup_limit_flags(l, qg_limit),
(long long)
btrfs_qgroup_limit_max_referenced(l, qg_limit),
(long long)
btrfs_qgroup_limit_max_exclusive(l, qg_limit),
(long long)
btrfs_qgroup_limit_rsv_referenced(l, qg_limit),
(long long)
btrfs_qgroup_limit_rsv_exclusive(l, qg_limit));
break;
case BTRFS_STRING_ITEM_KEY:
/* dirty, but it's simple */
str = l->data + btrfs_item_ptr_offset(l, i);
printf("\t\titem data %.*s\n", btrfs_item_size(l, item), str);
break;
case BTRFS_DEV_STATS_KEY:
printf("\t\tdevice stats\n");
break;
};
fflush(stdout);
}
}
void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
{
int i;
u32 type;
u32 nr = btrfs_header_nritems(l);
struct btrfs_item *item;
struct btrfs_root_item *ri;
struct btrfs_dir_item *di;
struct btrfs_inode_item *ii;
struct btrfs_block_group_item *bi;
struct btrfs_file_extent_item *fi;
struct btrfs_extent_data_ref *dref;
struct btrfs_shared_data_ref *sref;
struct btrfs_dev_extent *dev_extent;
struct btrfs_key key;
struct btrfs_key found_key;
printk(KERN_INFO "leaf %llu total ptrs %d free space %d\n",
(unsigned long long)btrfs_header_bytenr(l), nr,
btrfs_leaf_free_space(root, l));
for (i = 0 ; i < nr ; i++) {
item = btrfs_item_nr(l, i);
btrfs_item_key_to_cpu(l, &key, i);
type = btrfs_key_type(&key);
printk(KERN_INFO "\titem %d key (%llu %x %llu) itemoff %d "
"itemsize %d\n",
i,
(unsigned long long)key.objectid, type,
(unsigned long long)key.offset,
btrfs_item_offset(l, item), btrfs_item_size(l, item));
switch (type) {
case BTRFS_INODE_ITEM_KEY:
ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
printk(KERN_INFO "\t\tinode generation %llu size %llu "
"mode %o\n",
(unsigned long long)
btrfs_inode_generation(l, ii),
(unsigned long long)btrfs_inode_size(l, ii),
btrfs_inode_mode(l, ii));
break;
case BTRFS_DIR_ITEM_KEY:
di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
btrfs_dir_item_key_to_cpu(l, di, &found_key);
printk(KERN_INFO "\t\tdir oid %llu type %u\n",
(unsigned long long)found_key.objectid,
btrfs_dir_type(l, di));
break;
case BTRFS_ROOT_ITEM_KEY:
ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
printk(KERN_INFO "\t\troot data bytenr %llu refs %u\n",
(unsigned long long)
btrfs_disk_root_bytenr(l, ri),
btrfs_disk_root_refs(l, ri));
break;
case BTRFS_EXTENT_ITEM_KEY:
print_extent_item(l, i);
break;
case BTRFS_TREE_BLOCK_REF_KEY:
printk(KERN_INFO "\t\ttree block backref\n");
break;
case BTRFS_SHARED_BLOCK_REF_KEY:
printk(KERN_INFO "\t\tshared block backref\n");
break;
case BTRFS_EXTENT_DATA_REF_KEY:
dref = btrfs_item_ptr(l, i,
struct btrfs_extent_data_ref);
print_extent_data_ref(l, dref);
break;
case BTRFS_SHARED_DATA_REF_KEY:
sref = btrfs_item_ptr(l, i,
struct btrfs_shared_data_ref);
printk(KERN_INFO "\t\tshared data backref count %u\n",
btrfs_shared_data_ref_count(l, sref));
break;
case BTRFS_EXTENT_DATA_KEY:
fi = btrfs_item_ptr(l, i,
struct btrfs_file_extent_item);
if (btrfs_file_extent_type(l, fi) ==
BTRFS_FILE_EXTENT_INLINE) {
printk(KERN_INFO "\t\tinline extent data "
"size %u\n",
btrfs_file_extent_inline_len(l, fi));
break;
}
printk(KERN_INFO "\t\textent data disk bytenr %llu "
"nr %llu\n",
(unsigned long long)
btrfs_file_extent_disk_bytenr(l, fi),
(unsigned long long)
btrfs_file_extent_disk_num_bytes(l, fi));
printk(KERN_INFO "\t\textent data offset %llu "
"nr %llu ram %llu\n",
(unsigned long long)
btrfs_file_extent_offset(l, fi),
(unsigned long long)
btrfs_file_extent_num_bytes(l, fi),
(unsigned long long)
btrfs_file_extent_ram_bytes(l, fi));
break;
case BTRFS_EXTENT_REF_V0_KEY:
#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
print_extent_ref_v0(l, i);
#else
BUG();
#endif
break;
case BTRFS_BLOCK_GROUP_ITEM_KEY:
bi = btrfs_item_ptr(l, i,
struct btrfs_block_group_item);
printk(KERN_INFO "\t\tblock group used %llu\n",
(unsigned long long)
btrfs_disk_block_group_used(l, bi));
break;
case BTRFS_CHUNK_ITEM_KEY:
print_chunk(l, btrfs_item_ptr(l, i,
struct btrfs_chunk));
break;
case BTRFS_DEV_ITEM_KEY:
print_dev_item(l, btrfs_item_ptr(l, i,
struct btrfs_dev_item));
break;
case BTRFS_DEV_EXTENT_KEY:
dev_extent = btrfs_item_ptr(l, i,
struct btrfs_dev_extent);
printk(KERN_INFO "\t\tdev extent chunk_tree %llu\n"
"\t\tchunk objectid %llu chunk offset %llu "
"length %llu\n",
(unsigned long long)
btrfs_dev_extent_chunk_tree(l, dev_extent),
(unsigned long long)
btrfs_dev_extent_chunk_objectid(l, dev_extent),
(unsigned long long)
btrfs_dev_extent_chunk_offset(l, dev_extent),
(unsigned long long)
btrfs_dev_extent_length(l, dev_extent));
};
}
}
void btrfs_print_leaf(struct btrfs_root *root, struct btrfs_leaf *l)
{
unsigned int i;
u32 nr = btrfs_header_nritems(&l->header);
struct btrfs_item *item;
struct btrfs_extent_item *ei;
struct btrfs_root_item *ri;
struct btrfs_dir_item *di;
struct btrfs_inode_item *ii;
struct btrfs_file_extent_item *fi;
struct btrfs_csum_item *ci;
struct btrfs_block_group_item *bi;
u32 type;
printf("leaf %llu ptrs %d free space %d generation %llu owner %llu\n",
(u64)btrfs_header_blocknr(&l->header), nr,
btrfs_leaf_free_space(root, l),
(u64)btrfs_header_generation(&l->header),
(u64)btrfs_header_owner(&l->header));
fflush(stdout);
for (i = 0 ; i < nr ; i++) {
item = l->items + i;
type = btrfs_disk_key_type(&item->key);
printf("\titem %d key (%llu %x %llu) itemoff %d itemsize %d\n",
i,
(u64)btrfs_disk_key_objectid(&item->key),
btrfs_disk_key_flags(&item->key),
(u64)btrfs_disk_key_offset(&item->key),
btrfs_item_offset(item),
btrfs_item_size(item));
switch (type) {
case BTRFS_INODE_ITEM_KEY:
ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
printf("\t\tinode generation %llu size %llu block group %llu mode %o\n",
(u64)btrfs_inode_generation(ii),
(u64)btrfs_inode_size(ii),
(u64)btrfs_inode_block_group(ii),
btrfs_inode_mode(ii));
break;
case BTRFS_DIR_ITEM_KEY:
di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
print_dir_item(l->items + i, di);
break;
case BTRFS_DIR_INDEX_KEY:
di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
print_dir_item(l->items + i, di);
break;
case BTRFS_ROOT_ITEM_KEY:
ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
printf("\t\troot data blocknr %llu dirid %llu refs %u\n",
(u64)btrfs_root_blocknr(ri),
(u64)btrfs_root_dirid(ri),
btrfs_root_refs(ri));
break;
case BTRFS_EXTENT_ITEM_KEY:
ei = btrfs_item_ptr(l, i, struct btrfs_extent_item);
printf("\t\textent data refs %u owner %llu\n",
btrfs_extent_refs(ei),
(u64)btrfs_extent_owner(ei));
break;
case BTRFS_CSUM_ITEM_KEY:
ci = btrfs_item_ptr(l, i,
struct btrfs_csum_item);
printf("\t\tcsum item\n");
break;
case BTRFS_EXTENT_DATA_KEY:
fi = btrfs_item_ptr(l, i,
struct btrfs_file_extent_item);
if (btrfs_file_extent_type(fi) ==
BTRFS_FILE_EXTENT_INLINE) {
printf("\t\tinline extent data size %u\n",
btrfs_file_extent_inline_len(l->items + i));
break;
}
printf("\t\textent data disk block %llu nr %llu\n",
(u64)btrfs_file_extent_disk_blocknr(fi),
(u64)btrfs_file_extent_disk_num_blocks(fi));
printf("\t\textent data offset %llu nr %llu\n",
(u64)btrfs_file_extent_offset(fi),
(u64)btrfs_file_extent_num_blocks(fi));
break;
case BTRFS_BLOCK_GROUP_ITEM_KEY:
bi = btrfs_item_ptr(l, i,
struct btrfs_block_group_item);
printf("\t\tblock group used %llu flags %x\n",
(u64)btrfs_block_group_used(bi),
bi->flags);
break;
case BTRFS_STRING_ITEM_KEY:
printf("\t\titem data %.*s\n", btrfs_item_size(item),
btrfs_leaf_data(l) + btrfs_item_offset(item));
break;
};
fflush(stdout);
}
}
void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
{
int i;
u32 type, nr;
struct btrfs_item *item;
struct btrfs_root_item *ri;
struct btrfs_dir_item *di;
struct btrfs_inode_item *ii;
struct btrfs_block_group_item *bi;
struct btrfs_file_extent_item *fi;
struct btrfs_extent_data_ref *dref;
struct btrfs_shared_data_ref *sref;
struct btrfs_dev_extent *dev_extent;
struct btrfs_key key;
struct btrfs_key found_key;
if (!l)
return;
nr = btrfs_header_nritems(l);
btrfs_info(root->fs_info, "leaf %llu total ptrs %d free space %d",
btrfs_header_bytenr(l), nr, btrfs_leaf_free_space(root, l));
for (i = 0 ; i < nr ; i++) {
item = btrfs_item_nr(i);
btrfs_item_key_to_cpu(l, &key, i);
type = key.type;
printk(KERN_INFO "\titem %d key (%llu %u %llu) itemoff %d "
"itemsize %d\n",
i, key.objectid, type, key.offset,
btrfs_item_offset(l, item), btrfs_item_size(l, item));
switch (type) {
case BTRFS_INODE_ITEM_KEY:
ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
printk(KERN_INFO "\t\tinode generation %llu size %llu "
"mode %o\n",
btrfs_inode_generation(l, ii),
btrfs_inode_size(l, ii),
btrfs_inode_mode(l, ii));
break;
case BTRFS_DIR_ITEM_KEY:
di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
btrfs_dir_item_key_to_cpu(l, di, &found_key);
printk(KERN_INFO "\t\tdir oid %llu type %u\n",
found_key.objectid,
btrfs_dir_type(l, di));
break;
case BTRFS_ROOT_ITEM_KEY:
ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
printk(KERN_INFO "\t\troot data bytenr %llu refs %u\n",
btrfs_disk_root_bytenr(l, ri),
btrfs_disk_root_refs(l, ri));
break;
case BTRFS_EXTENT_ITEM_KEY:
case BTRFS_METADATA_ITEM_KEY:
print_extent_item(l, i, type);
break;
case BTRFS_TREE_BLOCK_REF_KEY:
printk(KERN_INFO "\t\ttree block backref\n");
break;
case BTRFS_SHARED_BLOCK_REF_KEY:
printk(KERN_INFO "\t\tshared block backref\n");
break;
case BTRFS_EXTENT_DATA_REF_KEY:
dref = btrfs_item_ptr(l, i,
struct btrfs_extent_data_ref);
print_extent_data_ref(l, dref);
break;
case BTRFS_SHARED_DATA_REF_KEY:
sref = btrfs_item_ptr(l, i,
struct btrfs_shared_data_ref);
printk(KERN_INFO "\t\tshared data backref count %u\n",
btrfs_shared_data_ref_count(l, sref));
break;
case BTRFS_EXTENT_DATA_KEY:
fi = btrfs_item_ptr(l, i,
struct btrfs_file_extent_item);
if (btrfs_file_extent_type(l, fi) ==
BTRFS_FILE_EXTENT_INLINE) {
printk(KERN_INFO "\t\tinline extent data "
"size %u\n",
btrfs_file_extent_inline_len(l, i, fi));
break;
}
printk(KERN_INFO "\t\textent data disk bytenr %llu "
"nr %llu\n",
btrfs_file_extent_disk_bytenr(l, fi),
btrfs_file_extent_disk_num_bytes(l, fi));
printk(KERN_INFO "\t\textent data offset %llu "
"nr %llu ram %llu\n",
btrfs_file_extent_offset(l, fi),
btrfs_file_extent_num_bytes(l, fi),
btrfs_file_extent_ram_bytes(l, fi));
break;
case BTRFS_EXTENT_REF_V0_KEY:
#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
print_extent_ref_v0(l, i);
#else
BUG();
#endif
break;
case BTRFS_BLOCK_GROUP_ITEM_KEY:
bi = btrfs_item_ptr(l, i,
struct btrfs_block_group_item);
printk(KERN_INFO "\t\tblock group used %llu\n",
btrfs_disk_block_group_used(l, bi));
break;
case BTRFS_CHUNK_ITEM_KEY:
print_chunk(l, btrfs_item_ptr(l, i,
struct btrfs_chunk));
break;
case BTRFS_DEV_ITEM_KEY:
print_dev_item(l, btrfs_item_ptr(l, i,
struct btrfs_dev_item));
break;
case BTRFS_DEV_EXTENT_KEY:
dev_extent = btrfs_item_ptr(l, i,
struct btrfs_dev_extent);
printk(KERN_INFO "\t\tdev extent chunk_tree %llu\n"
"\t\tchunk objectid %llu chunk offset %llu "
"length %llu\n",
btrfs_dev_extent_chunk_tree(l, dev_extent),
btrfs_dev_extent_chunk_objectid(l, dev_extent),
btrfs_dev_extent_chunk_offset(l, dev_extent),
btrfs_dev_extent_length(l, dev_extent));
break;
case BTRFS_PERSISTENT_ITEM_KEY:
printk(KERN_INFO "\t\tpersistent item objectid %llu offset %llu\n",
key.objectid, key.offset);
switch (key.objectid) {
case BTRFS_DEV_STATS_OBJECTID:
printk(KERN_INFO "\t\tdevice stats\n");
break;
default:
printk(KERN_INFO "\t\tunknown persistent item\n");
}
break;
case BTRFS_TEMPORARY_ITEM_KEY:
printk(KERN_INFO "\t\ttemporary item objectid %llu offset %llu\n",
key.objectid, key.offset);
switch (key.objectid) {
case BTRFS_BALANCE_OBJECTID:
printk(KERN_INFO "\t\tbalance status\n");
break;
default:
printk(KERN_INFO "\t\tunknown temporary item\n");
}
break;
case BTRFS_DEV_REPLACE_KEY:
printk(KERN_INFO "\t\tdev replace\n");
break;
case BTRFS_UUID_KEY_SUBVOL:
case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
print_uuid_item(l, btrfs_item_ptr_offset(l, i),
btrfs_item_size_nr(l, i));
break;
};
}
}
void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *eb)
{
struct btrfs_item *item;
struct btrfs_disk_key disk_key;
u32 i;
u32 nr;
nr = btrfs_header_nritems(eb);
printf("leaf %llu items %d free space %d generation %llu owner %llu\n",
(unsigned long long)btrfs_header_bytenr(eb), nr,
btrfs_leaf_free_space(root, eb),
(unsigned long long)btrfs_header_generation(eb),
(unsigned long long)btrfs_header_owner(eb));
print_uuids(eb);
fflush(stdout);
for (i = 0; i < nr; i++) {
u32 item_size;
void *ptr;
u64 objectid;
u32 type;
u64 offset;
char flags_str[256];
char uuid_str[BTRFS_UUID_UNPARSED_SIZE];
u8 uuid[BTRFS_UUID_SIZE];
item = btrfs_item_nr(i);
item_size = btrfs_item_size(eb, item);
/* Untyped extraction of slot from btrfs_item_ptr */
ptr = btrfs_item_ptr(eb, i, void*);
btrfs_item_key(eb, &disk_key, i);
objectid = btrfs_disk_key_objectid(&disk_key);
type = btrfs_disk_key_type(&disk_key);
offset = btrfs_disk_key_offset(&disk_key);
printf("\titem %d ", i);
btrfs_print_key(&disk_key);
printf(" itemoff %d itemsize %d\n",
btrfs_item_offset(eb, item),
btrfs_item_size(eb, item));
if (type == 0 && objectid == BTRFS_FREE_SPACE_OBJECTID)
print_free_space_header(eb, i);
switch (type) {
case BTRFS_INODE_ITEM_KEY:
print_inode_item(eb, ptr);
break;
case BTRFS_INODE_REF_KEY:
print_inode_ref_item(eb, item_size, ptr);
break;
case BTRFS_INODE_EXTREF_KEY:
print_inode_extref_item(eb, item_size, ptr);
break;
case BTRFS_DIR_ITEM_KEY:
case BTRFS_DIR_INDEX_KEY:
case BTRFS_XATTR_ITEM_KEY:
print_dir_item(eb, item_size, ptr);
break;
case BTRFS_DIR_LOG_INDEX_KEY:
case BTRFS_DIR_LOG_ITEM_KEY: {
struct btrfs_dir_log_item *dlog;
dlog = btrfs_item_ptr(eb, i, struct btrfs_dir_log_item);
printf("\t\tdir log end %Lu\n",
(unsigned long long)btrfs_dir_log_end(eb, dlog));
break;
}
case BTRFS_ORPHAN_ITEM_KEY:
printf("\t\torphan item\n");
break;
case BTRFS_ROOT_ITEM_KEY:
print_root(eb, i);
break;
case BTRFS_ROOT_REF_KEY:
print_root_ref(eb, i, "ref");
break;
case BTRFS_ROOT_BACKREF_KEY:
print_root_ref(eb, i, "backref");
break;
case BTRFS_EXTENT_ITEM_KEY:
print_extent_item(eb, i, 0);
break;
case BTRFS_METADATA_ITEM_KEY:
print_extent_item(eb, i, 1);
break;
case BTRFS_TREE_BLOCK_REF_KEY:
printf("\t\ttree block backref\n");
break;
case BTRFS_SHARED_BLOCK_REF_KEY:
printf("\t\tshared block backref\n");
break;
case BTRFS_EXTENT_DATA_REF_KEY: {
struct btrfs_extent_data_ref *dref;
dref = btrfs_item_ptr(eb, i, struct btrfs_extent_data_ref);
printf("\t\textent data backref root %llu "
"objectid %llu offset %llu count %u\n",
(unsigned long long)btrfs_extent_data_ref_root(eb, dref),
(unsigned long long)btrfs_extent_data_ref_objectid(eb, dref),
(unsigned long long)btrfs_extent_data_ref_offset(eb, dref),
btrfs_extent_data_ref_count(eb, dref));
break;
}
case BTRFS_SHARED_DATA_REF_KEY: {
struct btrfs_shared_data_ref *sref;
sref = btrfs_item_ptr(eb, i, struct btrfs_shared_data_ref);
printf("\t\tshared data backref count %u\n",
btrfs_shared_data_ref_count(eb, sref));
break;
}
case BTRFS_EXTENT_REF_V0_KEY:
#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
print_extent_ref_v0(eb, i);
#else
BUG();
#endif
break;
case BTRFS_CSUM_ITEM_KEY:
printf("\t\tcsum item\n");
break;
case BTRFS_EXTENT_CSUM_KEY:
printf("\t\textent csum item\n");
break;
case BTRFS_EXTENT_DATA_KEY:
print_file_extent_item(eb, item, i, ptr);
break;
case BTRFS_BLOCK_GROUP_ITEM_KEY: {
struct btrfs_block_group_item bg_item;
read_extent_buffer(eb, &bg_item, (unsigned long)ptr,
sizeof(bg_item));
memset(flags_str, 0, sizeof(flags_str));
bg_flags_to_str(btrfs_block_group_flags(&bg_item),
flags_str);
printf("\t\tblock group used %llu chunk_objectid %llu flags %s\n",
(unsigned long long)btrfs_block_group_used(&bg_item),
(unsigned long long)btrfs_block_group_chunk_objectid(&bg_item),
flags_str);
break;
}
case BTRFS_FREE_SPACE_INFO_KEY: {
struct btrfs_free_space_info *free_info;
free_info = btrfs_item_ptr(eb, i, struct btrfs_free_space_info);
printf("\t\tfree space info extent count %u flags %u\n",
(unsigned)btrfs_free_space_extent_count(eb, free_info),
(unsigned)btrfs_free_space_flags(eb, free_info));
break;
}
case BTRFS_FREE_SPACE_EXTENT_KEY:
printf("\t\tfree space extent\n");
break;
case BTRFS_FREE_SPACE_BITMAP_KEY:
printf("\t\tfree space bitmap\n");
break;
case BTRFS_CHUNK_ITEM_KEY:
print_chunk(eb, ptr);
break;
case BTRFS_DEV_ITEM_KEY:
print_dev_item(eb, ptr);
break;
case BTRFS_DEV_EXTENT_KEY: {
struct btrfs_dev_extent *dev_extent;
dev_extent = btrfs_item_ptr(eb, i,
struct btrfs_dev_extent);
read_extent_buffer(eb, uuid,
(unsigned long)btrfs_dev_extent_chunk_tree_uuid(dev_extent),
BTRFS_UUID_SIZE);
uuid_unparse(uuid, uuid_str);
printf("\t\tdev extent chunk_tree %llu\n"
"\t\tchunk_objectid %llu chunk_offset %llu "
"length %llu\n"
"\t\tchunk_tree_uuid %s\n",
(unsigned long long)
btrfs_dev_extent_chunk_tree(eb, dev_extent),
(unsigned long long)
btrfs_dev_extent_chunk_objectid(eb, dev_extent),
(unsigned long long)
btrfs_dev_extent_chunk_offset(eb, dev_extent),
(unsigned long long)
btrfs_dev_extent_length(eb, dev_extent),
uuid_str);
break;
}
case BTRFS_QGROUP_STATUS_KEY: {
struct btrfs_qgroup_status_item *qg_status;
qg_status = btrfs_item_ptr(eb, i,
struct btrfs_qgroup_status_item);
memset(flags_str, 0, sizeof(flags_str));
qgroup_flags_to_str(btrfs_qgroup_status_flags(eb, qg_status),
flags_str);
printf("\t\tversion %llu generation %llu flags %s "
"scan %lld\n",
(unsigned long long)
btrfs_qgroup_status_version(eb, qg_status),
(unsigned long long)
btrfs_qgroup_status_generation(eb, qg_status),
flags_str,
(unsigned long long)
btrfs_qgroup_status_rescan(eb, qg_status));
break;
}
case BTRFS_QGROUP_RELATION_KEY:
break;
case BTRFS_QGROUP_INFO_KEY: {
struct btrfs_qgroup_info_item *qg_info;
qg_info = btrfs_item_ptr(eb, i,
struct btrfs_qgroup_info_item);
printf("\t\tgeneration %llu\n"
"\t\treferenced %llu referenced_compressed %llu\n"
"\t\texclusive %llu exclusive_compressed %llu\n",
(unsigned long long)
btrfs_qgroup_info_generation(eb, qg_info),
(unsigned long long)
btrfs_qgroup_info_referenced(eb, qg_info),
(unsigned long long)
btrfs_qgroup_info_referenced_compressed(eb,
qg_info),
(unsigned long long)
btrfs_qgroup_info_exclusive(eb, qg_info),
(unsigned long long)
btrfs_qgroup_info_exclusive_compressed(eb,
qg_info));
break;
}
case BTRFS_QGROUP_LIMIT_KEY: {
struct btrfs_qgroup_limit_item *qg_limit;
qg_limit = btrfs_item_ptr(eb, i,
struct btrfs_qgroup_limit_item);
printf("\t\tflags %llx\n"
"\t\tmax_referenced %lld max_exclusive %lld\n"
"\t\trsv_referenced %lld rsv_exclusive %lld\n",
(unsigned long long)
btrfs_qgroup_limit_flags(eb, qg_limit),
(long long)
btrfs_qgroup_limit_max_referenced(eb, qg_limit),
(long long)
btrfs_qgroup_limit_max_exclusive(eb, qg_limit),
(long long)
btrfs_qgroup_limit_rsv_referenced(eb, qg_limit),
(long long)
btrfs_qgroup_limit_rsv_exclusive(eb, qg_limit));
break;
}
case BTRFS_UUID_KEY_SUBVOL:
case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
print_uuid_item(eb, btrfs_item_ptr_offset(eb, i),
btrfs_item_size_nr(eb, i));
break;
case BTRFS_STRING_ITEM_KEY: {
const char *str = eb->data + btrfs_item_ptr_offset(eb, i);
printf("\t\titem data %.*s\n", item_size, str);
break;
}
case BTRFS_PERSISTENT_ITEM_KEY:
printf("\t\tpersistent item objectid ");
print_objectid(stdout, objectid, BTRFS_PERSISTENT_ITEM_KEY);
printf(" offset %llu\n", (unsigned long long)offset);
switch (objectid) {
case BTRFS_DEV_STATS_OBJECTID:
print_dev_stats(eb, ptr, item_size);
break;
default:
printf("\t\tunknown persistent item objectid %llu\n",
objectid);
}
break;
case BTRFS_TEMPORARY_ITEM_KEY:
printf("\t\ttemporary item objectid ");
print_objectid(stdout, objectid, BTRFS_TEMPORARY_ITEM_KEY);
printf(" offset %llu\n", (unsigned long long)offset);
switch (objectid) {
case BTRFS_BALANCE_OBJECTID:
print_balance_item(eb, ptr);
break;
default:
printf("\t\tunknown temporary item objectid %llu\n",
objectid);
}
break;
};
fflush(stdout);
}
}
void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
{
int i;
char *str;
struct btrfs_item *item;
struct btrfs_root_item *ri;
struct btrfs_dir_item *di;
struct btrfs_inode_item *ii;
struct btrfs_file_extent_item *fi;
struct btrfs_block_group_item *bi;
struct btrfs_extent_data_ref *dref;
struct btrfs_shared_data_ref *sref;
struct btrfs_inode_ref *iref;
struct btrfs_dev_extent *dev_extent;
struct btrfs_disk_key disk_key;
struct btrfs_root_item root_item;
struct btrfs_block_group_item bg_item;
struct btrfs_dir_log_item *dlog;
u32 nr = btrfs_header_nritems(l);
u32 type;
printf("leaf %llu items %d free space %d generation %llu owner %llu\n",
(unsigned long long)btrfs_header_bytenr(l), nr,
btrfs_leaf_free_space(root, l),
(unsigned long long)btrfs_header_generation(l),
(unsigned long long)btrfs_header_owner(l));
print_uuids(l);
fflush(stdout);
for (i = 0 ; i < nr ; i++) {
item = btrfs_item_nr(l, i);
btrfs_item_key(l, &disk_key, i);
type = btrfs_disk_key_type(&disk_key);
printf("\titem %d ", i);
btrfs_print_key(&disk_key);
printf(" itemoff %d itemsize %d\n",
btrfs_item_offset(l, item),
btrfs_item_size(l, item));
switch (type) {
case BTRFS_INODE_ITEM_KEY:
ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
printf("\t\tinode generation %llu size %llu block group %llu mode %o links %u\n",
(unsigned long long)btrfs_inode_generation(l, ii),
(unsigned long long)btrfs_inode_size(l, ii),
(unsigned long long)btrfs_inode_block_group(l,ii),
btrfs_inode_mode(l, ii),
btrfs_inode_nlink(l, ii));
break;
case BTRFS_INODE_REF_KEY:
iref = btrfs_item_ptr(l, i, struct btrfs_inode_ref);
print_inode_ref_item(l, item, iref);
break;
case BTRFS_DIR_ITEM_KEY:
case BTRFS_DIR_INDEX_KEY:
case BTRFS_XATTR_ITEM_KEY:
di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
print_dir_item(l, item, di);
break;
case BTRFS_DIR_LOG_INDEX_KEY:
case BTRFS_DIR_LOG_ITEM_KEY:
dlog = btrfs_item_ptr(l, i, struct btrfs_dir_log_item);
printf("\t\tdir log end %Lu\n",
(unsigned long long)btrfs_dir_log_end(l, dlog));
break;
case BTRFS_ORPHAN_ITEM_KEY:
printf("\t\torphan item\n");
break;
case BTRFS_ROOT_ITEM_KEY:
ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
read_extent_buffer(l, &root_item, (unsigned long)ri, sizeof(root_item));
printf("\t\troot data bytenr %llu level %d dirid %llu refs %u gen %llu\n",
(unsigned long long)btrfs_root_bytenr(&root_item),
btrfs_root_level(&root_item),
(unsigned long long)btrfs_root_dirid(&root_item),
btrfs_root_refs(&root_item),
(unsigned long long)btrfs_root_generation(&root_item));
if (btrfs_root_refs(&root_item) == 0) {
struct btrfs_key drop_key;
btrfs_disk_key_to_cpu(&drop_key,
&root_item.drop_progress);
printf("\t\tdrop ");
btrfs_print_key(&root_item.drop_progress);
printf(" level %d\n", root_item.drop_level);
}
break;
case BTRFS_ROOT_REF_KEY:
print_root_ref(l, i, "ref");
break;
case BTRFS_ROOT_BACKREF_KEY:
print_root_ref(l, i, "backref");
break;
case BTRFS_EXTENT_ITEM_KEY:
print_extent_item(l, i);
break;
case BTRFS_TREE_BLOCK_REF_KEY:
printf("\t\ttree block backref\n");
break;
case BTRFS_SHARED_BLOCK_REF_KEY:
printf("\t\tshared block backref\n");
break;
case BTRFS_EXTENT_DATA_REF_KEY:
dref = btrfs_item_ptr(l, i, struct btrfs_extent_data_ref);
printf("\t\textent data backref root %llu "
"objectid %llu offset %llu count %u\n",
(unsigned long long)btrfs_extent_data_ref_root(l, dref),
(unsigned long long)btrfs_extent_data_ref_objectid(l, dref),
(unsigned long long)btrfs_extent_data_ref_offset(l, dref),
btrfs_extent_data_ref_count(l, dref));
break;
case BTRFS_SHARED_DATA_REF_KEY:
sref = btrfs_item_ptr(l, i, struct btrfs_shared_data_ref);
printf("\t\tshared data backref count %u\n",
btrfs_shared_data_ref_count(l, sref));
break;
case BTRFS_EXTENT_REF_V0_KEY:
#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
print_extent_ref_v0(l, i);
#else
BUG();
#endif
break;
case BTRFS_CSUM_ITEM_KEY:
printf("\t\tcsum item\n");
break;
case BTRFS_EXTENT_CSUM_KEY:
printf("\t\textent csum item\n");
break;
case BTRFS_EXTENT_DATA_KEY:
fi = btrfs_item_ptr(l, i,
struct btrfs_file_extent_item);
print_file_extent_item(l, item, fi);
break;
case BTRFS_BLOCK_GROUP_ITEM_KEY:
bi = btrfs_item_ptr(l, i,
struct btrfs_block_group_item);
read_extent_buffer(l, &bg_item, (unsigned long)bi,
sizeof(bg_item));
printf("\t\tblock group used %llu chunk_objectid %llu flags %llu\n",
(unsigned long long)btrfs_block_group_used(&bg_item),
(unsigned long long)btrfs_block_group_chunk_objectid(&bg_item),
(unsigned long long)btrfs_block_group_flags(&bg_item));
break;
case BTRFS_CHUNK_ITEM_KEY:
print_chunk(l, btrfs_item_ptr(l, i, struct btrfs_chunk));
break;
case BTRFS_DEV_ITEM_KEY:
print_dev_item(l, btrfs_item_ptr(l, i,
struct btrfs_dev_item));
break;
case BTRFS_DEV_EXTENT_KEY:
dev_extent = btrfs_item_ptr(l, i,
struct btrfs_dev_extent);
printf("\t\tdev extent chunk_tree %llu\n"
"\t\tchunk objectid %llu chunk offset %llu "
"length %llu\n",
(unsigned long long)
btrfs_dev_extent_chunk_tree(l, dev_extent),
(unsigned long long)
btrfs_dev_extent_chunk_objectid(l, dev_extent),
(unsigned long long)
btrfs_dev_extent_chunk_offset(l, dev_extent),
(unsigned long long)
btrfs_dev_extent_length(l, dev_extent));
break;
case BTRFS_STRING_ITEM_KEY:
/* dirty, but it's simple */
str = l->data + btrfs_item_ptr_offset(l, i);
printf("\t\titem data %.*s\n", btrfs_item_size(l, item), str);
break;
};
fflush(stdout);
}
}
