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Diffstat (limited to 'fs/btrfs/disk-io.c')
-rw-r--r--fs/btrfs/disk-io.c97
1 files changed, 91 insertions, 6 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 88e21bdbc47..8e37fa120cc 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -28,6 +28,7 @@
#include "disk-io.h"
#include "transaction.h"
#include "btrfs_inode.h"
+#include "volumes.h"
#include "print-tree.h"
#if 0
@@ -234,6 +235,19 @@ static int btree_writepage_io_hook(struct page *page, u64 start, u64 end)
return 0;
}
+static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio)
+{
+ struct btrfs_root *root = BTRFS_I(inode)->root;
+ u64 offset;
+ offset = bio->bi_sector << 9;
+ if (offset == BTRFS_SUPER_INFO_OFFSET) {
+ bio->bi_bdev = root->fs_info->sb->s_bdev;
+ submit_bio(rw, bio);
+ return 0;
+ }
+ return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio);
+}
+
static int btree_writepage(struct page *page, struct writeback_control *wbc)
{
struct extent_io_tree *tree;
@@ -345,6 +359,23 @@ int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize)
return ret;
}
+static int close_all_devices(struct btrfs_fs_info *fs_info)
+{
+ struct list_head *list;
+ struct list_head *next;
+ struct btrfs_device *device;
+
+ list = &fs_info->devices;
+ while(!list_empty(list)) {
+ next = list->next;
+ list_del(next);
+ device = list_entry(next, struct btrfs_device, dev_list);
+ kfree(device->name);
+ kfree(device);
+ }
+ return 0;
+}
+
struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
u32 blocksize)
{
@@ -420,6 +451,8 @@ static int __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize,
root->leafsize = leafsize;
root->stripesize = stripesize;
root->ref_cows = 0;
+ root->track_dirty = 0;
+
root->fs_info = fs_info;
root->objectid = objectid;
root->last_trans = 0;
@@ -427,6 +460,8 @@ static int __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize,
root->last_inode_alloc = 0;
root->name = NULL;
root->in_sysfs = 0;
+
+ INIT_LIST_HEAD(&root->dirty_list);
memset(&root->root_key, 0, sizeof(root->root_key));
memset(&root->root_item, 0, sizeof(root->root_item));
memset(&root->defrag_progress, 0, sizeof(root->defrag_progress));
@@ -634,6 +669,10 @@ struct btrfs_root *open_ctree(struct super_block *sb)
GFP_NOFS);
struct btrfs_fs_info *fs_info = kmalloc(sizeof(*fs_info),
GFP_NOFS);
+ struct btrfs_root *chunk_root = kmalloc(sizeof(struct btrfs_root),
+ GFP_NOFS);
+ struct btrfs_root *dev_root = kmalloc(sizeof(struct btrfs_root),
+ GFP_NOFS);
int ret;
int err = -EIO;
struct btrfs_super_block *disk_super;
@@ -657,6 +696,12 @@ struct btrfs_root *open_ctree(struct super_block *sb)
fs_info->last_trans_committed = 0;
fs_info->tree_root = tree_root;
fs_info->extent_root = extent_root;
+ fs_info->chunk_root = chunk_root;
+ fs_info->dev_root = dev_root;
+ INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots);
+ INIT_LIST_HEAD(&fs_info->devices);
+ btrfs_mapping_init(&fs_info->mapping_tree);
+ fs_info->last_device = &fs_info->devices;
fs_info->sb = sb;
fs_info->throttles = 0;
fs_info->mount_opt = 0;
@@ -714,12 +759,12 @@ struct btrfs_root *open_ctree(struct super_block *sb)
goto fail_iput;
}
#endif
- __setup_root(512, 512, 512, 512, tree_root,
+ __setup_root(4096, 4096, 4096, 4096, tree_root,
fs_info, BTRFS_ROOT_TREE_OBJECTID);
fs_info->sb_buffer = read_tree_block(tree_root,
BTRFS_SUPER_INFO_OFFSET,
- 512);
+ 4096);
if (!fs_info->sb_buffer)
goto fail_iput;
@@ -730,6 +775,7 @@ struct btrfs_root *open_ctree(struct super_block *sb)
read_extent_buffer(fs_info->sb_buffer, fs_info->fsid,
(unsigned long)btrfs_super_fsid(fs_info->sb_buffer),
BTRFS_FSID_SIZE);
+
disk_super = &fs_info->super_copy;
if (!btrfs_super_root(disk_super))
goto fail_sb_buffer;
@@ -753,23 +799,47 @@ struct btrfs_root *open_ctree(struct super_block *sb)
goto fail_sb_buffer;
}
+ mutex_lock(&fs_info->fs_mutex);
+ ret = btrfs_read_sys_array(tree_root);
+ BUG_ON(ret);
+
+ blocksize = btrfs_level_size(tree_root,
+ btrfs_super_chunk_root_level(disk_super));
+
+ __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);
+ BUG_ON(!chunk_root->node);
+
+ ret = btrfs_read_chunk_tree(chunk_root);
+ BUG_ON(ret);
+
blocksize = btrfs_level_size(tree_root,
btrfs_super_root_level(disk_super));
+
tree_root->node = read_tree_block(tree_root,
btrfs_super_root(disk_super),
blocksize);
if (!tree_root->node)
goto fail_sb_buffer;
- mutex_lock(&fs_info->fs_mutex);
ret = find_and_setup_root(tree_root, fs_info,
BTRFS_EXTENT_TREE_OBJECTID, extent_root);
- if (ret) {
- mutex_unlock(&fs_info->fs_mutex);
+ if (ret)
goto fail_tree_root;
- }
+ extent_root->track_dirty = 1;
+
+ ret = find_and_setup_root(tree_root, fs_info,
+ BTRFS_DEV_TREE_OBJECTID, dev_root);
+ dev_root->track_dirty = 1;
+
+ if (ret)
+ goto fail_extent_root;
btrfs_read_block_groups(extent_root);
@@ -777,7 +847,10 @@ struct btrfs_root *open_ctree(struct super_block *sb)
mutex_unlock(&fs_info->fs_mutex);
return tree_root;
+fail_extent_root:
+ free_extent_buffer(extent_root->node);
fail_tree_root:
+ mutex_unlock(&fs_info->fs_mutex);
free_extent_buffer(tree_root->node);
fail_sb_buffer:
free_extent_buffer(fs_info->sb_buffer);
@@ -874,6 +947,12 @@ int close_ctree(struct btrfs_root *root)
if (fs_info->tree_root->node)
free_extent_buffer(fs_info->tree_root->node);
+ if (root->fs_info->chunk_root->node);
+ free_extent_buffer(root->fs_info->chunk_root->node);
+
+ if (root->fs_info->dev_root->node);
+ free_extent_buffer(root->fs_info->dev_root->node);
+
free_extent_buffer(fs_info->sb_buffer);
btrfs_free_block_groups(root->fs_info);
@@ -901,8 +980,13 @@ int close_ctree(struct btrfs_root *root)
kfree(hasher);
}
#endif
+ close_all_devices(fs_info);
+ btrfs_mapping_tree_free(&fs_info->mapping_tree);
+
kfree(fs_info->extent_root);
kfree(fs_info->tree_root);
+ kfree(fs_info->chunk_root);
+ kfree(fs_info->dev_root);
return 0;
}
@@ -1016,4 +1100,5 @@ int btrfs_read_buffer(struct extent_buffer *buf)
static struct extent_io_ops btree_extent_io_ops = {
.writepage_io_hook = btree_writepage_io_hook,
+ .submit_bio_hook = btree_submit_bio_hook,
};
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-30 08:31:23 +0000