RepoMirrors
/
btrfs-progs
mirror of https://github.com/kdave/btrfs-progs
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Btrfs-progs: cleanup similar code in open_ctree_* and close_ctree 

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
This commit is contained in:
Miao Xie 2013-07-03 21:25:12 +08:00 committed by Chris Mason
parent d25aa23b02
commit 615f286785
3 changed files with 307 additions and 315 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

137
btrfs-find-root.c
View File

@ -67,74 +67,31 @@ int csum_block(void *buf, u32 len)
static struct btrfs_root *open_ctree_broken(int fd, const char *device)
{
u32 sectorsize;
u32 nodesize;
u32 leafsize;
u32 blocksize;
u32 stripesize;
u64 generation;
struct btrfs_root *tree_root = malloc(sizeof(struct btrfs_root));
struct btrfs_root *extent_root = malloc(sizeof(struct btrfs_root));
struct btrfs_root *chunk_root = malloc(sizeof(struct btrfs_root));
struct btrfs_root *dev_root = malloc(sizeof(struct btrfs_root));
struct btrfs_root *csum_root = malloc(sizeof(struct btrfs_root));
struct btrfs_fs_info *fs_info = malloc(sizeof(*fs_info));
int ret;
struct btrfs_fs_info *fs_info;
struct btrfs_super_block *disk_super;
struct btrfs_fs_devices *fs_devices = NULL;
u64 total_devs;
u64 features;
struct extent_buffer *eb;
int ret;
ret = btrfs_scan_one_device(fd, device, &fs_devices,
&total_devs, BTRFS_SUPER_INFO_OFFSET);
fs_info = btrfs_new_fs_info(0, BTRFS_SUPER_INFO_OFFSET);
if (!fs_info) {
fprintf(stderr, "Failed to allocate memory for fs_info\n");
return NULL;
}
if (ret) {
fprintf(stderr, "No valid Btrfs found on %s\n", device);
ret = btrfs_scan_fs_devices(fd, device, &fs_devices);
if (ret)
goto out;
}
if (total_devs != 1) {
ret = btrfs_scan_for_fsid(fs_devices, total_devs, 1);
if (ret)
goto out;
}
memset(fs_info, 0, sizeof(*fs_info));
fs_info->super_copy = calloc(1, BTRFS_SUPER_INFO_SIZE);
fs_info->tree_root = tree_root;
fs_info->extent_root = extent_root;
fs_info->chunk_root = chunk_root;
fs_info->dev_root = dev_root;
fs_info->csum_root = csum_root;
fs_info->readonly = 1;
extent_io_tree_init(&fs_info->extent_cache);
extent_io_tree_init(&fs_info->free_space_cache);
extent_io_tree_init(&fs_info->block_group_cache);
extent_io_tree_init(&fs_info->pinned_extents);
extent_io_tree_init(&fs_info->pending_del);
extent_io_tree_init(&fs_info->extent_ins);
cache_tree_init(&fs_info->fs_root_cache);
cache_tree_init(&fs_info->mapping_tree.cache_tree);
mutex_init(&fs_info->fs_mutex);
fs_info->fs_devices = fs_devices;
INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots);
INIT_LIST_HEAD(&fs_info->space_info);
__setup_root(4096, 4096, 4096, 4096, tree_root,
fs_info, BTRFS_ROOT_TREE_OBJECTID);
ret = btrfs_open_devices(fs_devices, O_RDONLY);
if (ret)
goto out_cleanup;
goto out_devices;
fs_info->super_bytenr = BTRFS_SUPER_INFO_OFFSET;
disk_super = fs_info->super_copy;
ret = btrfs_read_dev_super(fs_devices->latest_bdev,
disk_super, BTRFS_SUPER_INFO_OFFSET);
disk_super, fs_info->super_bytenr);
if (ret) {
printk("No valid btrfs found\n");
goto out_devices;
@ -142,77 +99,27 @@ static struct btrfs_root *open_ctree_broken(int fd, const char *device)
memcpy(fs_info->fsid, &disk_super->fsid, BTRFS_FSID_SIZE);
features = btrfs_super_incompat_flags(disk_super) &
~BTRFS_FEATURE_INCOMPAT_SUPP;
if (features) {
printk("couldn't open because of unsupported "
"option features (%Lx).\n", features);
goto out_devices;
}
features = btrfs_super_incompat_flags(disk_super);
if (!(features & BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF)) {
features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF;
btrfs_set_super_incompat_flags(disk_super, features);
}
nodesize = btrfs_super_nodesize(disk_super);
leafsize = btrfs_super_leafsize(disk_super);
sectorsize = btrfs_super_sectorsize(disk_super);
stripesize = btrfs_super_stripesize(disk_super);
tree_root->nodesize = nodesize;
tree_root->leafsize = leafsize;
tree_root->sectorsize = sectorsize;
tree_root->stripesize = stripesize;
ret = btrfs_read_sys_array(tree_root);
ret = btrfs_check_fs_compatibility(disk_super, 0);
if (ret)
goto out_devices;
blocksize = btrfs_level_size(tree_root,
btrfs_super_chunk_root_level(disk_super));
generation = btrfs_super_chunk_root_generation(disk_super);
__setup_root(nodesize, leafsize, sectorsize, stripesize,
chunk_root, fs_info, BTRFS_CHUNK_TREE_OBJECTID);
ret = btrfs_setup_chunk_tree_and_device_map(fs_info);
if (ret)
goto out_chunk;
chunk_root->node = read_tree_block(chunk_root,
btrfs_super_chunk_root(disk_super),
blocksize, generation);
if (!chunk_root->node) {
printk("Couldn't read chunk root\n");
goto out_devices;
}
read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid,
(unsigned long)btrfs_header_chunk_tree_uuid(chunk_root->node),
BTRFS_UUID_SIZE);
if (!(btrfs_super_flags(disk_super) & BTRFS_SUPER_FLAG_METADUMP)) {
ret = btrfs_read_chunk_tree(chunk_root);
if (ret)
goto out_chunk;
}
eb = fs_info->chunk_root->node;
read_extent_buffer(eb, fs_info->chunk_tree_uuid,
(unsigned long)btrfs_header_chunk_tree_uuid(eb),
BTRFS_UUID_SIZE);
return fs_info->chunk_root;
out_chunk:
free_extent_buffer(fs_info->chunk_root->node);
btrfs_cleanup_all_caches(fs_info);
out_devices:
btrfs_close_devices(fs_info->fs_devices);
out_cleanup:
extent_io_tree_cleanup(&fs_info->extent_cache);
extent_io_tree_cleanup(&fs_info->free_space_cache);
extent_io_tree_cleanup(&fs_info->block_group_cache);
extent_io_tree_cleanup(&fs_info->pinned_extents);
extent_io_tree_cleanup(&fs_info->pending_del);
extent_io_tree_cleanup(&fs_info->extent_ins);
out:
free(tree_root);
free(extent_root);
free(chunk_root);
free(dev_root);
free(csum_root);
free(fs_info);
btrfs_free_fs_info(fs_info);
return NULL;
}

473
disk-io.c
View File

@ -796,61 +796,46 @@ struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info,
return root;
}
static struct btrfs_fs_info *__open_ctree_fd(int fp, const char *path,
u64 sb_bytenr,
u64 root_tree_bytenr, int writes,
int partial)
void btrfs_free_fs_info(struct btrfs_fs_info *fs_info)
{
u32 sectorsize;
u32 nodesize;
u32 leafsize;
u32 blocksize;
u32 stripesize;
u64 generation;
struct btrfs_key key;
struct btrfs_root *tree_root = malloc(sizeof(struct btrfs_root));
struct btrfs_root *extent_root = malloc(sizeof(struct btrfs_root));
struct btrfs_root *chunk_root = malloc(sizeof(struct btrfs_root));
struct btrfs_root *dev_root = malloc(sizeof(struct btrfs_root));
struct btrfs_root *csum_root = malloc(sizeof(struct btrfs_root));
struct btrfs_fs_info *fs_info = malloc(sizeof(*fs_info));
int ret;
struct btrfs_super_block *disk_super;
struct btrfs_fs_devices *fs_devices = NULL;
u64 total_devs;
u64 features;
free(fs_info->tree_root);
free(fs_info->extent_root);
free(fs_info->chunk_root);
free(fs_info->dev_root);
free(fs_info->csum_root);
free(fs_info->super_copy);
free(fs_info->log_root_tree);
free(fs_info);
}
if (sb_bytenr == 0)
sb_bytenr = BTRFS_SUPER_INFO_OFFSET;
struct btrfs_fs_info *btrfs_new_fs_info(int writable, u64 sb_bytenr)
{
struct btrfs_fs_info *fs_info;
/* try to drop all the caches */
if (posix_fadvise(fp, 0, 0, POSIX_FADV_DONTNEED))
fprintf(stderr, "Warning, could not drop caches\n");
fs_info = malloc(sizeof(struct btrfs_fs_info));
if (!fs_info)
return NULL;
ret = btrfs_scan_one_device(fp, path, &fs_devices,
&total_devs, sb_bytenr);
memset(fs_info, 0, sizeof(struct btrfs_fs_info));
if (ret) {
fprintf(stderr, "No valid Btrfs found on %s\n", path);
goto out;
}
fs_info->tree_root = malloc(sizeof(struct btrfs_root));
fs_info->extent_root = malloc(sizeof(struct btrfs_root));
fs_info->chunk_root = malloc(sizeof(struct btrfs_root));
fs_info->dev_root = malloc(sizeof(struct btrfs_root));
fs_info->csum_root = malloc(sizeof(struct btrfs_root));
fs_info->super_copy = malloc(BTRFS_SUPER_INFO_SIZE);
if (total_devs != 1) {
ret = btrfs_scan_for_fsid(fs_devices, total_devs, 1);
if (ret)
goto out;
}
if (!fs_info->tree_root || !fs_info->extent_root ||
!fs_info->chunk_root || !fs_info->dev_root ||
!fs_info->csum_root || !fs_info->super_copy)
goto free_all;
memset(fs_info, 0, sizeof(*fs_info));
fs_info->super_copy = calloc(1, BTRFS_SUPER_INFO_SIZE);
fs_info->tree_root = tree_root;
fs_info->extent_root = extent_root;
fs_info->chunk_root = chunk_root;
fs_info->dev_root = dev_root;
fs_info->csum_root = csum_root;
if (!writes)
fs_info->readonly = 1;
memset(fs_info->super_copy, 0, BTRFS_SUPER_INFO_SIZE);
memset(fs_info->tree_root, 0, sizeof(struct btrfs_root));
memset(fs_info->extent_root, 0, sizeof(struct btrfs_root));
memset(fs_info->chunk_root, 0, sizeof(struct btrfs_root));
memset(fs_info->dev_root, 0, sizeof(struct btrfs_root));
memset(fs_info->csum_root, 0, sizeof(struct btrfs_root));
extent_io_tree_init(&fs_info->extent_cache);
extent_io_tree_init(&fs_info->free_space_cache);
@ -858,139 +843,121 @@ static struct btrfs_fs_info *__open_ctree_fd(int fp, const char *path,
extent_io_tree_init(&fs_info->pinned_extents);
extent_io_tree_init(&fs_info->pending_del);
extent_io_tree_init(&fs_info->extent_ins);
cache_tree_init(&fs_info->fs_root_cache);
cache_tree_init(&fs_info->fs_root_cache);
cache_tree_init(&fs_info->mapping_tree.cache_tree);
mutex_init(&fs_info->fs_mutex);
fs_info->fs_devices = fs_devices;
INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots);
INIT_LIST_HEAD(&fs_info->space_info);
__setup_root(4096, 4096, 4096, 4096, tree_root,
fs_info, BTRFS_ROOT_TREE_OBJECTID);
if (writes)
ret = btrfs_open_devices(fs_devices, O_RDWR);
else
ret = btrfs_open_devices(fs_devices, O_RDONLY);
if (ret)
goto out_cleanup;
if (!writable)
fs_info->readonly = 1;
fs_info->super_bytenr = sb_bytenr;
disk_super = fs_info->super_copy;
ret = btrfs_read_dev_super(fs_devices->latest_bdev,
disk_super, sb_bytenr);
if (ret) {
printk("No valid btrfs found\n");
goto out_devices;
}
fs_info->data_alloc_profile = (u64)-1;
fs_info->metadata_alloc_profile = (u64)-1;
fs_info->system_alloc_profile = fs_info->metadata_alloc_profile;
return fs_info;
free_all:
btrfs_free_fs_info(fs_info);
return NULL;
}
memcpy(fs_info->fsid, &disk_super->fsid, BTRFS_FSID_SIZE);
int btrfs_check_fs_compatibility(struct btrfs_super_block *sb, int writable)
{
u64 features;
features = btrfs_super_incompat_flags(disk_super) &
features = btrfs_super_incompat_flags(sb) &
~BTRFS_FEATURE_INCOMPAT_SUPP;
if (features) {
printk("couldn't open because of unsupported "
"option features (%Lx).\n",
(unsigned long long)features);
goto out_devices;
return -ENOTSUP;
}
features = btrfs_super_incompat_flags(disk_super);
features = btrfs_super_incompat_flags(sb);
if (!(features & BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF)) {
features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF;
btrfs_set_super_incompat_flags(disk_super, features);
btrfs_set_super_incompat_flags(sb, features);
}
features = btrfs_super_compat_ro_flags(disk_super) &
features = btrfs_super_compat_ro_flags(sb) &
~BTRFS_FEATURE_COMPAT_RO_SUPP;
if (writes && features) {
if (writable && features) {
printk("couldn't open RDWR because of unsupported "
"option features (%Lx).\n",
(unsigned long long)features);
goto out_devices;
return -ENOTSUP;
}
return 0;
}
nodesize = btrfs_super_nodesize(disk_super);
leafsize = btrfs_super_leafsize(disk_super);
sectorsize = btrfs_super_sectorsize(disk_super);
stripesize = btrfs_super_stripesize(disk_super);
tree_root->nodesize = nodesize;
tree_root->leafsize = leafsize;
tree_root->sectorsize = sectorsize;
tree_root->stripesize = stripesize;
int btrfs_setup_all_roots(struct btrfs_fs_info *fs_info,
u64 root_tree_bytenr, int partial)
{
struct btrfs_super_block *sb = fs_info->super_copy;
struct btrfs_root *root;
struct btrfs_key key;
u32 sectorsize;
u32 nodesize;
u32 leafsize;
u32 stripesize;
u64 generation;
u32 blocksize;
int ret;
ret = btrfs_read_sys_array(tree_root);
if (ret)
goto out_devices;
blocksize = btrfs_level_size(tree_root,
btrfs_super_chunk_root_level(disk_super));
generation = btrfs_super_chunk_root_generation(disk_super);
nodesize = btrfs_super_nodesize(sb);
leafsize = btrfs_super_leafsize(sb);
sectorsize = btrfs_super_sectorsize(sb);
stripesize = btrfs_super_stripesize(sb);
root = fs_info->tree_root;
__setup_root(nodesize, leafsize, sectorsize, stripesize,
chunk_root, fs_info, BTRFS_CHUNK_TREE_OBJECTID);
chunk_root->node = read_tree_block(chunk_root,
btrfs_super_chunk_root(disk_super),
blocksize, generation);
if (!extent_buffer_uptodate(chunk_root->node)) {
printk("Couldn't read chunk root\n");
goto out_devices;
}
read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid,
(unsigned long)btrfs_header_chunk_tree_uuid(chunk_root->node),
BTRFS_UUID_SIZE);
if (!(btrfs_super_flags(disk_super) & BTRFS_SUPER_FLAG_METADUMP)) {
ret = btrfs_read_chunk_tree(chunk_root);
if (ret) {
printk("Couldn't read chunk tree\n");
goto out_chunk;
}
}
blocksize = btrfs_level_size(tree_root,
btrfs_super_root_level(disk_super));
generation = btrfs_super_generation(disk_super);
root, fs_info, BTRFS_ROOT_TREE_OBJECTID);
blocksize = btrfs_level_size(root, btrfs_super_root_level(sb));
generation = btrfs_super_generation(sb);
if (!root_tree_bytenr)
root_tree_bytenr = btrfs_super_root(disk_super);
tree_root->node = read_tree_block(tree_root,
root_tree_bytenr,
blocksize, generation);
if (!extent_buffer_uptodate(tree_root->node)) {
printk("Couldn't read tree root\n");
goto out_failed;
root_tree_bytenr = btrfs_super_root(sb);
root->node = read_tree_block(root, root_tree_bytenr, blocksize,
generation);
if (!extent_buffer_uptodate(root->node)) {
fprintf(stderr, "Couldn't read tree root\n");
return -EIO;
}
ret = find_and_setup_root(tree_root, fs_info,
BTRFS_EXTENT_TREE_OBJECTID, extent_root);
ret = find_and_setup_root(root, fs_info, BTRFS_EXTENT_TREE_OBJECTID,
fs_info->extent_root);
if (ret) {
printk("Couldn't setup extent tree\n");
goto out_failed;
return -EIO;
}
extent_root->track_dirty = 1;
fs_info->extent_root->track_dirty = 1;
ret = find_and_setup_root(tree_root, fs_info,
BTRFS_DEV_TREE_OBJECTID, dev_root);
ret = find_and_setup_root(root, fs_info, BTRFS_DEV_TREE_OBJECTID,
fs_info->dev_root);
if (ret) {
printk("Couldn't setup device tree\n");
goto out_failed;
return -EIO;
}
dev_root->track_dirty = 1;
fs_info->dev_root->track_dirty = 1;
ret = find_and_setup_root(tree_root, fs_info,
BTRFS_CSUM_TREE_OBJECTID, csum_root);
ret = find_and_setup_root(root, fs_info, BTRFS_CSUM_TREE_OBJECTID,
fs_info->csum_root);
if (ret) {
printk("Couldn't setup csum tree\n");
if (!partial)
goto out_failed;
return -EIO;
}
csum_root->track_dirty = 1;
fs_info->csum_root->track_dirty = 1;
find_and_setup_log_root(tree_root, fs_info, disk_super);
ret = find_and_setup_log_root(root, fs_info, sb);
if (ret) {
printk("Couldn't setup log root tree\n");
return -EIO;
}
fs_info->generation = generation;
fs_info->last_trans_committed = generation;
@ -1002,18 +969,12 @@ static struct btrfs_fs_info *__open_ctree_fd(int fp, const char *path,
fs_info->fs_root = btrfs_read_fs_root(fs_info, &key);
if (!fs_info->fs_root)
goto out_failed;
fs_info->data_alloc_profile = (u64)-1;
fs_info->metadata_alloc_profile = (u64)-1;
fs_info->system_alloc_profile = fs_info->metadata_alloc_profile;
return fs_info;
out_failed:
if (partial)
return fs_info;
return -EIO;
return 0;
}
void btrfs_release_all_roots(struct btrfs_fs_info *fs_info)
{
if (fs_info->csum_root)
free_extent_buffer(fs_info->csum_root->node);
if (fs_info->dev_root)
@ -1022,25 +983,179 @@ out_failed:
free_extent_buffer(fs_info->extent_root->node);
if (fs_info->tree_root)
free_extent_buffer(fs_info->tree_root->node);
out_chunk:
if (fs_info->log_root_tree)
free_extent_buffer(fs_info->log_root_tree->node);
if (fs_info->chunk_root)
free_extent_buffer(fs_info->chunk_root->node);
out_devices:
btrfs_close_devices(fs_info->fs_devices);
out_cleanup:
}
static void free_mapping_cache(struct btrfs_fs_info *fs_info)
{
struct cache_tree *cache_tree = &fs_info->mapping_tree.cache_tree;
struct cache_extent *ce;
struct map_lookup *map;
while ((ce = find_first_cache_extent(cache_tree, 0))) {
map = container_of(ce, struct map_lookup, ce);
remove_cache_extent(cache_tree, ce);
kfree(map);
}
}
void btrfs_cleanup_all_caches(struct btrfs_fs_info *fs_info)
{
free_mapping_cache(fs_info);
extent_io_tree_cleanup(&fs_info->extent_cache);
extent_io_tree_cleanup(&fs_info->free_space_cache);
extent_io_tree_cleanup(&fs_info->block_group_cache);
extent_io_tree_cleanup(&fs_info->pinned_extents);
extent_io_tree_cleanup(&fs_info->pending_del);
extent_io_tree_cleanup(&fs_info->extent_ins);
}
int btrfs_scan_fs_devices(int fd, const char *path,
struct btrfs_fs_devices **fs_devices)
{
u64 total_devs;
int ret;
ret = btrfs_scan_one_device(fd, path, fs_devices,
&total_devs, BTRFS_SUPER_INFO_OFFSET);
if (ret) {
fprintf(stderr, "No valid Btrfs found on %s\n", path);
return ret;
}
if (total_devs != 1) {
ret = btrfs_scan_for_fsid(*fs_devices, total_devs, 1);
if (ret)
return ret;
}
return 0;
}
int btrfs_setup_chunk_tree_and_device_map(struct btrfs_fs_info *fs_info)
{
struct btrfs_super_block *sb = fs_info->super_copy;
u32 sectorsize;
u32 nodesize;
u32 leafsize;
u32 blocksize;
u32 stripesize;
u64 generation;
int ret;
nodesize = btrfs_super_nodesize(sb);
leafsize = btrfs_super_leafsize(sb);
sectorsize = btrfs_super_sectorsize(sb);
stripesize = btrfs_super_stripesize(sb);
__setup_root(nodesize, leafsize, sectorsize, stripesize,
fs_info->chunk_root, fs_info, BTRFS_CHUNK_TREE_OBJECTID);
ret = btrfs_read_sys_array(fs_info->chunk_root);
if (ret)
return ret;
blocksize = btrfs_level_size(fs_info->chunk_root,
btrfs_super_chunk_root_level(sb));
generation = btrfs_super_chunk_root_generation(sb);
fs_info->chunk_root->node = read_tree_block(fs_info->chunk_root,
btrfs_super_chunk_root(sb),
blocksize, generation);
if (!fs_info->chunk_root->node ||
!extent_buffer_uptodate(fs_info->chunk_root->node)) {
fprintf(stderr, "Couldn't read chunk root\n");
return ret;
}
if (!(btrfs_super_flags(sb) & BTRFS_SUPER_FLAG_METADUMP)) {
ret = btrfs_read_chunk_tree(fs_info->chunk_root);
if (ret) {
fprintf(stderr, "Couldn't read chunk tree\n");
return ret;
}
}
return 0;
}
static struct btrfs_fs_info *__open_ctree_fd(int fp, const char *path,
u64 sb_bytenr,
u64 root_tree_bytenr, int writes,
int partial)
{
struct btrfs_fs_info *fs_info;
struct btrfs_super_block *disk_super;
struct btrfs_fs_devices *fs_devices = NULL;
struct extent_buffer *eb;
int ret;
if (sb_bytenr == 0)
sb_bytenr = BTRFS_SUPER_INFO_OFFSET;
/* try to drop all the caches */
if (posix_fadvise(fp, 0, 0, POSIX_FADV_DONTNEED))
fprintf(stderr, "Warning, could not drop caches\n");
fs_info = btrfs_new_fs_info(writes, sb_bytenr);
if (!fs_info) {
fprintf(stderr, "Failed to allocate memory for fs_info\n");
return NULL;
}
ret = btrfs_scan_fs_devices(fp, path, &fs_devices);
if (ret)
goto out;
fs_info->fs_devices = fs_devices;
if (writes)
ret = btrfs_open_devices(fs_devices, O_RDWR);
else
ret = btrfs_open_devices(fs_devices, O_RDONLY);
if (ret)
goto out_devices;
disk_super = fs_info->super_copy;
ret = btrfs_read_dev_super(fs_devices->latest_bdev,
disk_super, sb_bytenr);
if (ret) {
printk("No valid btrfs found\n");
goto out_devices;
}
memcpy(fs_info->fsid, &disk_super->fsid, BTRFS_FSID_SIZE);
ret = btrfs_check_fs_compatibility(fs_info->super_copy, writes);
if (ret)
goto out_devices;
ret = btrfs_setup_chunk_tree_and_device_map(fs_info);
if (ret)
goto out_chunk;
eb = fs_info->chunk_root->node;
read_extent_buffer(eb, fs_info->chunk_tree_uuid,
(unsigned long)btrfs_header_chunk_tree_uuid(eb),
BTRFS_UUID_SIZE);
ret = btrfs_setup_all_roots(fs_info, root_tree_bytenr, partial);
if (ret)
goto out_failed;
return fs_info;
out_failed:
if (partial)
return fs_info;
out_chunk:
btrfs_release_all_roots(fs_info);
btrfs_cleanup_all_caches(fs_info);
out_devices:
btrfs_close_devices(fs_devices);
out:
free(tree_root);
free(extent_root);
free(chunk_root);
free(dev_root);
free(csum_root);
free(fs_info);
btrfs_free_fs_info(fs_info);
return NULL;
}
@ -1259,19 +1374,6 @@ int write_ctree_super(struct btrfs_trans_handle *trans,
return ret;
}
static void free_mapping_cache(struct btrfs_fs_info *fs_info)
{
struct cache_tree *cache_tree = &fs_info->mapping_tree.cache_tree;
struct cache_extent *ce;
struct map_lookup *map;
while ((ce = find_first_cache_extent(cache_tree, 0))) {
map = container_of(ce, struct map_lookup, ce);
remove_cache_extent(cache_tree, ce);
kfree(map);
}
}
int close_ctree(struct btrfs_root *root)
{
int ret;
@ -1294,39 +1396,10 @@ int close_ctree(struct btrfs_root *root)
free_fs_roots(fs_info);
if (fs_info->extent_root->node)
free_extent_buffer(fs_info->extent_root->node);
if (fs_info->tree_root->node)
free_extent_buffer(fs_info->tree_root->node);
if (fs_info->chunk_root->node)
free_extent_buffer(fs_info->chunk_root->node);
if (fs_info->dev_root->node)
free_extent_buffer(fs_info->dev_root->node);
if (fs_info->csum_root->node)
free_extent_buffer(fs_info->csum_root->node);
if (fs_info->log_root_tree) {
if (fs_info->log_root_tree->node)
free_extent_buffer(fs_info->log_root_tree->node);
free(fs_info->log_root_tree);
}
btrfs_release_all_roots(fs_info);
btrfs_close_devices(fs_info->fs_devices);
free_mapping_cache(fs_info);
extent_io_tree_cleanup(&fs_info->extent_cache);
extent_io_tree_cleanup(&fs_info->free_space_cache);
extent_io_tree_cleanup(&fs_info->block_group_cache);
extent_io_tree_cleanup(&fs_info->pinned_extents);
extent_io_tree_cleanup(&fs_info->pending_del);
extent_io_tree_cleanup(&fs_info->extent_ins);
free(fs_info->tree_root);
free(fs_info->extent_root);
free(fs_info->chunk_root);
free(fs_info->dev_root);
free(fs_info->csum_root);
free(fs_info);
btrfs_cleanup_all_caches(fs_info);
btrfs_free_fs_info(fs_info);
return 0;
}

12
disk-io.h
View File

@ -47,6 +47,18 @@ int __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize,
struct btrfs_fs_info *fs_info, u64 objectid);
int clean_tree_block(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct extent_buffer *buf);
void btrfs_free_fs_info(struct btrfs_fs_info *fs_info);
struct btrfs_fs_info *btrfs_new_fs_info(int writable, u64 sb_bytenr);
int btrfs_check_fs_compatibility(struct btrfs_super_block *sb, int writable);
int btrfs_setup_all_roots(struct btrfs_fs_info *fs_info,
u64 root_tree_bytenr, int partial);
void btrfs_release_all_roots(struct btrfs_fs_info *fs_info);
void btrfs_cleanup_all_caches(struct btrfs_fs_info *fs_info);
int btrfs_scan_fs_devices(int fd, const char *path,
struct btrfs_fs_devices **fs_devices);
int btrfs_setup_chunk_tree_and_device_map(struct btrfs_fs_info *fs_info);
struct btrfs_root *open_ctree(const char *filename, u64 sb_bytenr, int writes);
struct btrfs_root *open_ctree_fd(int fp, const char *path, u64 sb_bytenr,
int writes);