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yaml
---
r: 128766
b: refs/heads/master
c: a061fc8
h: refs/heads/master
v: v3
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Chris Mason committed Sep 25, 2008
1 parent e5f7b5c commit a0d4507
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Showing 9 changed files with 413 additions and 123 deletions.
2 changes: 1 addition & 1 deletion [refs]
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Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: 5d9cd9ecbf40b8bd5045a3c2f1feb35db6a12266
refs/heads/master: a061fc8da7b990faa41ca503e66faef3ecdeead0
3 changes: 2 additions & 1 deletion trunk/fs/btrfs/ctree.h
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Original file line number Diff line number Diff line change
Expand Up @@ -505,7 +505,7 @@ struct btrfs_fs_info {
u64 alloc_start;
struct btrfs_transaction *running_transaction;
struct btrfs_super_block super_copy;
struct extent_buffer *sb_buffer;
struct btrfs_super_block super_for_commit;
struct block_device *__bdev;
struct super_block *sb;
struct inode *btree_inode;
Expand Down Expand Up @@ -1208,6 +1208,7 @@ BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);

/* struct btrfs_super_block */
BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
generation, 64);
BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
Expand Down
101 changes: 46 additions & 55 deletions trunk/fs/btrfs/disk-io.c
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Original file line number Diff line number Diff line change
Expand Up @@ -78,9 +78,13 @@ struct extent_map *btree_get_extent(struct inode *inode, struct page *page,

spin_lock(&em_tree->lock);
em = lookup_extent_mapping(em_tree, start, len);
spin_unlock(&em_tree->lock);
if (em)
if (em) {
em->bdev =
BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev;
spin_unlock(&em_tree->lock);
goto out;
}
spin_unlock(&em_tree->lock);

em = alloc_extent_map(GFP_NOFS);
if (!em) {
Expand All @@ -90,7 +94,7 @@ struct extent_map *btree_get_extent(struct inode *inode, struct page *page,
em->start = 0;
em->len = (u64)-1;
em->block_start = 0;
em->bdev = inode->i_sb->s_bdev;
em->bdev = BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev;

spin_lock(&em_tree->lock);
ret = add_extent_mapping(em_tree, em);
Expand Down Expand Up @@ -435,11 +439,6 @@ static int __btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio,
ret = btrfs_bio_wq_end_io(root->fs_info, bio, 1);
BUG_ON(ret);

if (offset == BTRFS_SUPER_INFO_OFFSET) {
bio->bi_bdev = root->fs_info->fs_devices->latest_bdev;
submit_bio(rw, bio);
return 0;
}
return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num);
}

Expand Down Expand Up @@ -587,8 +586,7 @@ static int close_all_devices(struct btrfs_fs_info *fs_info)
list = &fs_info->fs_devices->devices;
list_for_each(next, list) {
device = list_entry(next, struct btrfs_device, dev_list);
if (device->bdev && device->bdev != fs_info->sb->s_bdev)
close_bdev_excl(device->bdev);
close_bdev_excl(device->bdev);
device->bdev = NULL;
}
return 0;
Expand Down Expand Up @@ -1118,6 +1116,7 @@ struct btrfs_root *open_ctree(struct super_block *sb,
u32 leafsize;
u32 blocksize;
u32 stripesize;
struct buffer_head *bh;
struct btrfs_root *extent_root = kmalloc(sizeof(struct btrfs_root),
GFP_NOFS);
struct btrfs_root *tree_root = kmalloc(sizeof(struct btrfs_root),
Expand Down Expand Up @@ -1153,7 +1152,6 @@ struct btrfs_root *open_ctree(struct super_block *sb,
spin_lock_init(&fs_info->new_trans_lock);

init_completion(&fs_info->kobj_unregister);
sb_set_blocksize(sb, BTRFS_SUPER_INFO_SIZE);
fs_info->tree_root = tree_root;
fs_info->extent_root = extent_root;
fs_info->chunk_root = chunk_root;
Expand All @@ -1170,6 +1168,9 @@ struct btrfs_root *open_ctree(struct super_block *sb,
fs_info->btree_inode->i_ino = 1;
fs_info->btree_inode->i_nlink = 1;

sb->s_blocksize = 4096;
sb->s_blocksize_bits = blksize_bits(4096);

/*
* we set the i_size on the btree inode to the max possible int.
* the real end of the address space is determined by all of
Expand Down Expand Up @@ -1229,19 +1230,16 @@ struct btrfs_root *open_ctree(struct super_block *sb,
__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,
4096);

if (!fs_info->sb_buffer)
bh = __bread(fs_devices->latest_bdev,
BTRFS_SUPER_INFO_OFFSET / 4096, 4096);
if (!bh)
goto fail_iput;

read_extent_buffer(fs_info->sb_buffer, &fs_info->super_copy, 0,
sizeof(fs_info->super_copy));
memcpy(&fs_info->super_copy, bh->b_data, sizeof(fs_info->super_copy));
brelse(bh);

read_extent_buffer(fs_info->sb_buffer, fs_info->fsid,
(unsigned long)btrfs_super_fsid(fs_info->sb_buffer),
BTRFS_FSID_SIZE);
memcpy(fs_info->fsid, fs_info->super_copy.fsid, BTRFS_FSID_SIZE);

disk_super = &fs_info->super_copy;
if (!btrfs_super_root(disk_super))
Expand All @@ -1263,7 +1261,9 @@ struct btrfs_root *open_ctree(struct super_block *sb,
tree_root->leafsize = leafsize;
tree_root->sectorsize = sectorsize;
tree_root->stripesize = stripesize;
sb_set_blocksize(sb, sectorsize);

sb->s_blocksize = sectorsize;
sb->s_blocksize_bits = blksize_bits(sectorsize);

if (strncmp((char *)(&disk_super->magic), BTRFS_MAGIC,
sizeof(disk_super->magic))) {
Expand Down Expand Up @@ -1339,7 +1339,6 @@ struct btrfs_root *open_ctree(struct super_block *sb,
fail_sys_array:
mutex_unlock(&fs_info->fs_mutex);
fail_sb_buffer:
free_extent_buffer(fs_info->sb_buffer);
extent_io_tree_empty_lru(&BTRFS_I(fs_info->btree_inode)->io_tree);
fail_iput:
iput(fs_info->btree_inode);
Expand Down Expand Up @@ -1380,41 +1379,44 @@ int write_all_supers(struct btrfs_root *root)
struct list_head *cur;
struct list_head *head = &root->fs_info->fs_devices->devices;
struct btrfs_device *dev;
struct extent_buffer *sb;
struct btrfs_super_block *sb;
struct btrfs_dev_item *dev_item;
struct buffer_head *bh;
int ret;
int do_barriers;
int max_errors;
int total_errors = 0;
u32 crc;
u64 flags;

max_errors = btrfs_super_num_devices(&root->fs_info->super_copy) - 1;
do_barriers = !btrfs_test_opt(root, NOBARRIER);

sb = root->fs_info->sb_buffer;
dev_item = (struct btrfs_dev_item *)offsetof(struct btrfs_super_block,
dev_item);
sb = &root->fs_info->super_for_commit;
dev_item = &sb->dev_item;
list_for_each(cur, head) {
dev = list_entry(cur, struct btrfs_device, dev_list);
btrfs_set_device_type(sb, dev_item, dev->type);
btrfs_set_device_id(sb, dev_item, dev->devid);
btrfs_set_device_total_bytes(sb, dev_item, dev->total_bytes);
btrfs_set_device_bytes_used(sb, dev_item, dev->bytes_used);
btrfs_set_device_io_align(sb, dev_item, dev->io_align);
btrfs_set_device_io_width(sb, dev_item, dev->io_width);
btrfs_set_device_sector_size(sb, dev_item, dev->sector_size);
write_extent_buffer(sb, dev->uuid,
(unsigned long)btrfs_device_uuid(dev_item),
BTRFS_UUID_SIZE);

btrfs_set_header_flag(sb, BTRFS_HEADER_FLAG_WRITTEN);
csum_tree_block(root, sb, 0);

bh = __getblk(dev->bdev, BTRFS_SUPER_INFO_OFFSET /
root->fs_info->sb->s_blocksize,
btrfs_set_stack_device_type(dev_item, dev->type);
btrfs_set_stack_device_id(dev_item, dev->devid);
btrfs_set_stack_device_total_bytes(dev_item, dev->total_bytes);
btrfs_set_stack_device_bytes_used(dev_item, dev->bytes_used);
btrfs_set_stack_device_io_align(dev_item, dev->io_align);
btrfs_set_stack_device_io_width(dev_item, dev->io_width);
btrfs_set_stack_device_sector_size(dev_item, dev->sector_size);
memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE);
flags = btrfs_super_flags(sb);
btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN);


crc = ~(u32)0;
crc = btrfs_csum_data(root, (char *)sb + BTRFS_CSUM_SIZE, crc,
BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE);
btrfs_csum_final(crc, sb->csum);

bh = __getblk(dev->bdev, BTRFS_SUPER_INFO_OFFSET / 4096,
BTRFS_SUPER_INFO_SIZE);

read_extent_buffer(sb, bh->b_data, 0, BTRFS_SUPER_INFO_SIZE);
memcpy(bh->b_data, sb, BTRFS_SUPER_INFO_SIZE);
dev->pending_io = bh;

get_bh(bh);
Expand Down Expand Up @@ -1483,15 +1485,6 @@ int write_ctree_super(struct btrfs_trans_handle *trans, struct btrfs_root
int ret;

ret = write_all_supers(root);
#if 0
if (!btrfs_test_opt(root, NOBARRIER))
blkdev_issue_flush(sb->s_bdev, NULL);
set_extent_buffer_dirty(&BTRFS_I(btree_inode)->io_tree, super);
ret = sync_page_range_nolock(btree_inode, btree_inode->i_mapping,
super->start, super->len);
if (!btrfs_test_opt(root, NOBARRIER))
blkdev_issue_flush(sb->s_bdev, NULL);
#endif
return ret;
}

Expand Down Expand Up @@ -1570,8 +1563,6 @@ int close_ctree(struct btrfs_root *root)
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);
del_fs_roots(fs_info);

Expand Down Expand Up @@ -1652,7 +1643,7 @@ void btrfs_throttle(struct btrfs_root *root)
{
struct backing_dev_info *bdi;

bdi = root->fs_info->sb->s_bdev->bd_inode->i_mapping->backing_dev_info;
bdi = &root->fs_info->bdi;
if (root->fs_info->throttles && bdi_write_congested(bdi)) {
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18)
congestion_wait(WRITE, HZ/20);
Expand Down
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