* Boston, MA 021110-1307, USA.
*/
+#include <linux/bio.h>
#include <linux/buffer_head.h>
#include <linux/fs.h>
#include <linux/pagemap.h>
#include "btrfs_inode.h"
#include "ioctl.h"
#include "print-tree.h"
+#include "volumes.h"
struct btrfs_iget_args {
u64 ino;
u64 total = btrfs_super_total_bytes(&root->fs_info->super_copy);
u64 used = btrfs_super_bytes_used(&root->fs_info->super_copy);
u64 thresh;
+ unsigned long flags;
int ret = 0;
- return 0;
-
if (for_del)
thresh = total * 90;
else
do_div(thresh, 100);
- spin_lock(&root->fs_info->delalloc_lock);
+ spin_lock_irqsave(&root->fs_info->delalloc_lock, flags);
if (used + root->fs_info->delalloc_bytes + num_required > thresh)
ret = -ENOSPC;
- spin_unlock(&root->fs_info->delalloc_lock);
+ spin_unlock_irqrestore(&root->fs_info->delalloc_lock, flags);
return ret;
}
if (alloc_hint == EXTENT_MAP_INLINE)
goto out;
+ BUG_ON(num_bytes > btrfs_super_total_bytes(&root->fs_info->super_copy));
+
while(num_bytes > 0) {
cur_alloc_size = min(num_bytes, root->fs_info->max_extent);
ret = btrfs_alloc_extent(trans, root, cur_alloc_size,
+ root->sectorsize,
root->root_key.objectid,
trans->transid,
inode->i_ino, start, 0,
WARN_ON(1);
goto out;
}
+ cur_alloc_size = ins.offset;
ret = btrfs_insert_file_extent(trans, root, inode->i_ino,
start, ins.objectid, ins.offset,
ins.offset);
+ inode->i_blocks += ins.offset >> 9;
btrfs_check_file(root, inode);
+ if (num_bytes < cur_alloc_size) {
+ printk("num_bytes %Lu cur_alloc %Lu\n", num_bytes,
+ cur_alloc_size);
+ break;
+ }
num_bytes -= cur_alloc_size;
alloc_hint = ins.objectid + ins.offset;
start += cur_alloc_size;
btrfs_drop_extent_cache(inode, orig_start,
orig_start + orig_num_bytes - 1);
btrfs_add_ordered_inode(inode);
+ btrfs_update_inode(trans, root, inode);
out:
btrfs_end_transaction(trans, root);
return ret;
static int run_delalloc_range(struct inode *inode, u64 start, u64 end)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
- u64 num_bytes;
int ret;
mutex_lock(&root->fs_info->fs_mutex);
if (btrfs_test_opt(root, NODATACOW) ||
else
ret = cow_file_range(inode, start, end);
- spin_lock(&root->fs_info->delalloc_lock);
- num_bytes = end + 1 - start;
- if (root->fs_info->delalloc_bytes < num_bytes) {
- printk("delalloc accounting error total %llu sub %llu\n",
- root->fs_info->delalloc_bytes, num_bytes);
- } else {
- root->fs_info->delalloc_bytes -= num_bytes;
- }
- spin_unlock(&root->fs_info->delalloc_lock);
-
mutex_unlock(&root->fs_info->fs_mutex);
return ret;
}
-int btrfs_writepage_io_hook(struct page *page, u64 start, u64 end)
+int btrfs_set_bit_hook(struct inode *inode, u64 start, u64 end,
+ unsigned long old, unsigned long bits)
+{
+ unsigned long flags;
+ if (!(old & EXTENT_DELALLOC) && (bits & EXTENT_DELALLOC)) {
+ struct btrfs_root *root = BTRFS_I(inode)->root;
+ spin_lock_irqsave(&root->fs_info->delalloc_lock, flags);
+ BTRFS_I(inode)->delalloc_bytes += end - start + 1;
+ root->fs_info->delalloc_bytes += end - start + 1;
+ spin_unlock_irqrestore(&root->fs_info->delalloc_lock, flags);
+ }
+ return 0;
+}
+
+int btrfs_clear_bit_hook(struct inode *inode, u64 start, u64 end,
+ unsigned long old, unsigned long bits)
+{
+ if ((old & EXTENT_DELALLOC) && (bits & EXTENT_DELALLOC)) {
+ struct btrfs_root *root = BTRFS_I(inode)->root;
+ unsigned long flags;
+
+ spin_lock_irqsave(&root->fs_info->delalloc_lock, flags);
+ if (end - start + 1 > root->fs_info->delalloc_bytes) {
+ printk("warning: delalloc account %Lu %Lu\n",
+ end - start + 1, root->fs_info->delalloc_bytes);
+ root->fs_info->delalloc_bytes = 0;
+ BTRFS_I(inode)->delalloc_bytes = 0;
+ } else {
+ root->fs_info->delalloc_bytes -= end - start + 1;
+ BTRFS_I(inode)->delalloc_bytes -= end - start + 1;
+ }
+ spin_unlock_irqrestore(&root->fs_info->delalloc_lock, flags);
+ }
+ return 0;
+}
+
+int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
+ size_t size, struct bio *bio)
+{
+ struct btrfs_root *root = BTRFS_I(page->mapping->host)->root;
+ struct btrfs_mapping_tree *map_tree;
+ u64 logical = bio->bi_sector << 9;
+ u64 length = 0;
+ u64 map_length;
+ int ret;
+
+ length = bio->bi_size;
+ map_tree = &root->fs_info->mapping_tree;
+ map_length = length;
+ ret = btrfs_map_block(map_tree, READ, logical,
+ &map_length, NULL, 0);
+
+ if (map_length < length + size) {
+ return 1;
+ }
+ return 0;
+}
+
+int __btrfs_submit_bio_hook(struct inode *inode, int rw, struct bio *bio,
+ int mirror_num)
{
- struct inode *inode = page->mapping->host;
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_trans_handle *trans;
- char *kaddr;
int ret = 0;
- u64 page_start = (u64)page->index << PAGE_CACHE_SHIFT;
- size_t offset = start - page_start;
- if (btrfs_test_opt(root, NODATASUM) ||
- btrfs_test_flag(inode, NODATASUM))
- return 0;
+ char *sums = NULL;
+
+ ret = btrfs_csum_one_bio(root, bio, &sums);
+ BUG_ON(ret);
+
mutex_lock(&root->fs_info->fs_mutex);
trans = btrfs_start_transaction(root, 1);
+
btrfs_set_trans_block_group(trans, inode);
- kaddr = kmap(page);
- btrfs_csum_file_block(trans, root, inode, inode->i_ino,
- start, kaddr + offset, end - start + 1);
- kunmap(page);
+ btrfs_csum_file_blocks(trans, root, inode, bio, sums);
+
ret = btrfs_end_transaction(trans, root);
BUG_ON(ret);
mutex_unlock(&root->fs_info->fs_mutex);
- return ret;
+
+ kfree(sums);
+
+ return btrfs_map_bio(root, rw, bio, mirror_num);
+}
+
+int btrfs_submit_bio_hook(struct inode *inode, int rw, struct bio *bio,
+ int mirror_num)
+{
+ struct btrfs_root *root = BTRFS_I(inode)->root;
+ int ret = 0;
+
+ if (!(rw & (1 << BIO_RW))) {
+ ret = btrfs_bio_wq_end_io(root->fs_info, bio, 0);
+ BUG_ON(ret);
+ goto mapit;
+ }
+
+ if (btrfs_test_opt(root, NODATASUM) ||
+ btrfs_test_flag(inode, NODATASUM)) {
+ goto mapit;
+ }
+
+ return btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info,
+ inode, rw, bio, mirror_num,
+ __btrfs_submit_bio_hook);
+mapit:
+ return btrfs_map_bio(root, rw, bio, mirror_num);
}
int btrfs_readpage_io_hook(struct page *page, u64 start, u64 end)
struct btrfs_csum_item *item;
struct btrfs_path *path = NULL;
u32 csum;
+
if (btrfs_test_opt(root, NODATASUM) ||
btrfs_test_flag(inode, NODATASUM))
return 0;
+
mutex_lock(&root->fs_info->fs_mutex);
path = btrfs_alloc_path();
item = btrfs_lookup_csum(NULL, root, path, inode->i_ino, start, 0);
return ret;
}
+struct io_failure_record {
+ struct page *page;
+ u64 start;
+ u64 len;
+ u64 logical;
+ int last_mirror;
+};
+
+int btrfs_readpage_io_failed_hook(struct bio *failed_bio,
+ struct page *page, u64 start, u64 end,
+ struct extent_state *state)
+{
+ struct io_failure_record *failrec = NULL;
+ u64 private;
+ struct extent_map *em;
+ struct inode *inode = page->mapping->host;
+ struct extent_io_tree *failure_tree = &BTRFS_I(inode)->io_failure_tree;
+ struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree;
+ struct bio *bio;
+ int num_copies;
+ int ret;
+ u64 logical;
+
+ ret = get_state_private(failure_tree, start, &private);
+ if (ret) {
+ failrec = kmalloc(sizeof(*failrec), GFP_NOFS);
+ if (!failrec)
+ return -ENOMEM;
+ failrec->start = start;
+ failrec->len = end - start + 1;
+ failrec->last_mirror = 0;
+
+ spin_lock(&em_tree->lock);
+ em = lookup_extent_mapping(em_tree, start, failrec->len);
+ if (em->start > start || em->start + em->len < start) {
+ free_extent_map(em);
+ em = NULL;
+ }
+ spin_unlock(&em_tree->lock);
+
+ if (!em || IS_ERR(em)) {
+ kfree(failrec);
+ return -EIO;
+ }
+ logical = start - em->start;
+ logical = em->block_start + logical;
+ failrec->logical = logical;
+ free_extent_map(em);
+ set_extent_bits(failure_tree, start, end, EXTENT_LOCKED |
+ EXTENT_DIRTY, GFP_NOFS);
+ set_state_private(failure_tree, start,
+ (u64)(unsigned long)failrec);
+ } else {
+ failrec = (struct io_failure_record *)(unsigned long)private;
+ }
+ num_copies = btrfs_num_copies(
+ &BTRFS_I(inode)->root->fs_info->mapping_tree,
+ failrec->logical, failrec->len);
+ failrec->last_mirror++;
+ if (!state) {
+ spin_lock_irq(&BTRFS_I(inode)->io_tree.lock);
+ state = find_first_extent_bit_state(&BTRFS_I(inode)->io_tree,
+ failrec->start,
+ EXTENT_LOCKED);
+ if (state && state->start != failrec->start)
+ state = NULL;
+ spin_unlock_irq(&BTRFS_I(inode)->io_tree.lock);
+ }
+ if (!state || failrec->last_mirror > num_copies) {
+ set_state_private(failure_tree, failrec->start, 0);
+ clear_extent_bits(failure_tree, failrec->start,
+ failrec->start + failrec->len - 1,
+ EXTENT_LOCKED | EXTENT_DIRTY, GFP_NOFS);
+ kfree(failrec);
+ return -EIO;
+ }
+ bio = bio_alloc(GFP_NOFS, 1);
+ bio->bi_private = state;
+ bio->bi_end_io = failed_bio->bi_end_io;
+ bio->bi_sector = failrec->logical >> 9;
+ bio->bi_bdev = failed_bio->bi_bdev;
+ bio->bi_size = 0;
+ bio_add_page(bio, page, failrec->len, start - page_offset(page));
+ btrfs_submit_bio_hook(inode, READ, bio, failrec->last_mirror);
+ return 0;
+}
+
int btrfs_readpage_end_io_hook(struct page *page, u64 start, u64 end,
struct extent_state *state)
{
if (btrfs_test_opt(root, NODATASUM) ||
btrfs_test_flag(inode, NODATASUM))
return 0;
-
- if (state->start == start) {
+ if (state && state->start == start) {
private = state->private;
ret = 0;
} else {
}
kunmap_atomic(kaddr, KM_IRQ0);
local_irq_restore(flags);
+
+ /* if the io failure tree for this inode is non-empty,
+ * check to see if we've recovered from a failed IO
+ */
+ private = 0;
+ if (count_range_bits(&BTRFS_I(inode)->io_failure_tree, &private,
+ (u64)-1, 1, EXTENT_DIRTY)) {
+ u64 private_failure;
+ struct io_failure_record *failure;
+ ret = get_state_private(&BTRFS_I(inode)->io_failure_tree,
+ start, &private_failure);
+ if (ret == 0) {
+ failure = (struct io_failure_record *)(unsigned long)
+ private_failure;
+ set_state_private(&BTRFS_I(inode)->io_failure_tree,
+ failure->start, 0);
+ clear_extent_bits(&BTRFS_I(inode)->io_failure_tree,
+ failure->start,
+ failure->start + failure->len - 1,
+ EXTENT_DIRTY | EXTENT_LOCKED,
+ GFP_NOFS);
+ kfree(failure);
+ }
+ }
return 0;
zeroit:
flush_dcache_page(page);
kunmap_atomic(kaddr, KM_IRQ0);
local_irq_restore(flags);
- return 0;
+ if (private == 0)
+ return 0;
+ return -EIO;
}
void btrfs_read_locked_inode(struct inode *inode)
struct btrfs_path *path;
struct extent_buffer *leaf;
struct btrfs_inode_item *inode_item;
- struct btrfs_inode_timespec *tspec;
+ struct btrfs_timespec *tspec;
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_key location;
u64 alloc_group_block;
BTRFS_I(inode)->flags = btrfs_inode_flags(leaf, inode_item);
if (!BTRFS_I(inode)->block_group) {
BTRFS_I(inode)->block_group = btrfs_find_block_group(root,
- NULL, 0, 0, 0);
+ NULL, 0,
+ BTRFS_BLOCK_GROUP_METADATA, 0);
}
btrfs_free_path(path);
inode_item = NULL;
switch (inode->i_mode & S_IFMT) {
case S_IFREG:
inode->i_mapping->a_ops = &btrfs_aops;
+ inode->i_mapping->backing_dev_info = &root->fs_info->bdi;
BTRFS_I(inode)->io_tree.ops = &btrfs_extent_io_ops;
inode->i_fop = &btrfs_file_operations;
inode->i_op = &btrfs_file_inode_operations;
case S_IFLNK:
inode->i_op = &btrfs_symlink_inode_operations;
inode->i_mapping->a_ops = &btrfs_symlink_aops;
+ inode->i_mapping->backing_dev_info = &root->fs_info->bdi;
break;
default:
init_special_inode(inode, inode->i_mode, rdev);
return err;
}
-static int btrfs_free_inode(struct btrfs_trans_handle *trans,
- struct btrfs_root *root,
- struct inode *inode)
-{
- struct btrfs_path *path;
- int ret;
-
- clear_inode(inode);
-
- path = btrfs_alloc_path();
- BUG_ON(!path);
- ret = btrfs_lookup_inode(trans, root, path,
- &BTRFS_I(inode)->location, -1);
- if (ret > 0)
- ret = -ENOENT;
- if (!ret)
- ret = btrfs_del_item(trans, root, path);
- btrfs_free_path(path);
- return ret;
-}
-
/*
* this can truncate away extent items, csum items and directory items.
* It starts at a high offset and removes keys until it can't find
*/
static int btrfs_truncate_in_trans(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
- struct inode *inode)
+ struct inode *inode,
+ u32 min_type)
{
int ret;
struct btrfs_path *path;
u64 root_owner = 0;
int found_extent;
int del_item;
+ int pending_del_nr = 0;
+ int pending_del_slot = 0;
int extent_type = -1;
+ u64 mask = root->sectorsize - 1;
- btrfs_drop_extent_cache(inode, inode->i_size, (u64)-1);
+ btrfs_drop_extent_cache(inode, inode->i_size & (~mask), (u64)-1);
path = btrfs_alloc_path();
path->reada = -1;
BUG_ON(!path);
key.offset = (u64)-1;
key.type = (u8)-1;
+ btrfs_init_path(path);
+search_again:
+ ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
+ if (ret < 0) {
+ goto error;
+ }
+ if (ret > 0) {
+ BUG_ON(path->slots[0] == 0);
+ path->slots[0]--;
+ }
+
while(1) {
- btrfs_init_path(path);
fi = NULL;
- ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
- if (ret < 0) {
- goto error;
- }
- if (ret > 0) {
- BUG_ON(path->slots[0] == 0);
- path->slots[0]--;
- }
leaf = path->nodes[0];
btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);
found_type = btrfs_key_type(&found_key);
if (found_key.objectid != inode->i_ino)
break;
- if (found_type != BTRFS_CSUM_ITEM_KEY &&
- found_type != BTRFS_DIR_ITEM_KEY &&
- found_type != BTRFS_DIR_INDEX_KEY &&
- found_type != BTRFS_EXTENT_DATA_KEY)
+ if (found_type < min_type)
break;
item_end = found_key.offset;
found_type = BTRFS_INODE_ITEM_KEY;
} else if (found_type == BTRFS_EXTENT_ITEM_KEY) {
found_type = BTRFS_CSUM_ITEM_KEY;
+ } else if (found_type == BTRFS_EXTENT_DATA_KEY) {
+ found_type = BTRFS_XATTR_ITEM_KEY;
+ } else if (found_type == BTRFS_XATTR_ITEM_KEY) {
+ found_type = BTRFS_INODE_REF_KEY;
} else if (found_type) {
found_type--;
} else {
break;
}
btrfs_set_key_type(&key, found_type);
- btrfs_release_path(root, path);
- continue;
+ goto next;
}
if (found_key.offset >= inode->i_size)
del_item = 1;
btrfs_file_extent_num_bytes(leaf, fi);
extent_num_bytes = inode->i_size -
found_key.offset + root->sectorsize - 1;
+ extent_num_bytes = extent_num_bytes &
+ ~((u64)root->sectorsize - 1);
btrfs_set_file_extent_num_bytes(leaf, fi,
extent_num_bytes);
num_dec = (orig_num_bytes -
- extent_num_bytes) >> 9;
- if (extent_start != 0) {
- inode->i_blocks -= num_dec;
- }
+ extent_num_bytes);
+ if (extent_start != 0)
+ dec_i_blocks(inode, num_dec);
btrfs_mark_buffer_dirty(leaf);
} else {
extent_num_bytes =
btrfs_file_extent_disk_num_bytes(leaf,
fi);
/* FIXME blocksize != 4096 */
- num_dec = btrfs_file_extent_num_bytes(leaf,
- fi) >> 9;
+ num_dec = btrfs_file_extent_num_bytes(leaf, fi);
if (extent_start != 0) {
found_extent = 1;
- inode->i_blocks -= num_dec;
+ dec_i_blocks(inode, num_dec);
}
root_gen = btrfs_header_generation(leaf);
root_owner = btrfs_header_owner(leaf);
}
- } else if (extent_type == BTRFS_FILE_EXTENT_INLINE &&
- !del_item) {
- u32 newsize = inode->i_size - found_key.offset;
- newsize = btrfs_file_extent_calc_inline_size(newsize);
- ret = btrfs_truncate_item(trans, root, path,
- newsize, 1);
- BUG_ON(ret);
+ } else if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
+ if (!del_item) {
+ u32 newsize = inode->i_size - found_key.offset;
+ dec_i_blocks(inode, item_end + 1 -
+ found_key.offset - newsize);
+ newsize =
+ btrfs_file_extent_calc_inline_size(newsize);
+ ret = btrfs_truncate_item(trans, root, path,
+ newsize, 1);
+ BUG_ON(ret);
+ } else {
+ dec_i_blocks(inode, item_end + 1 -
+ found_key.offset);
+ }
}
delete:
if (del_item) {
- ret = btrfs_del_item(trans, root, path);
- if (ret)
- goto error;
+ if (!pending_del_nr) {
+ /* no pending yet, add ourselves */
+ pending_del_slot = path->slots[0];
+ pending_del_nr = 1;
+ } else if (pending_del_nr &&
+ path->slots[0] + 1 == pending_del_slot) {
+ /* hop on the pending chunk */
+ pending_del_nr++;
+ pending_del_slot = path->slots[0];
+ } else {
+ printk("bad pending slot %d pending_del_nr %d pending_del_slot %d\n", path->slots[0], pending_del_nr, pending_del_slot);
+ }
} else {
break;
}
- btrfs_release_path(root, path);
if (found_extent) {
ret = btrfs_free_extent(trans, root, extent_start,
extent_num_bytes,
found_key.offset, 0);
BUG_ON(ret);
}
+next:
+ if (path->slots[0] == 0) {
+ if (pending_del_nr)
+ goto del_pending;
+ btrfs_release_path(root, path);
+ goto search_again;
+ }
+
+ path->slots[0]--;
+ if (pending_del_nr &&
+ path->slots[0] + 1 != pending_del_slot) {
+ struct btrfs_key debug;
+del_pending:
+ btrfs_item_key_to_cpu(path->nodes[0], &debug,
+ pending_del_slot);
+ ret = btrfs_del_items(trans, root, path,
+ pending_del_slot,
+ pending_del_nr);
+ BUG_ON(ret);
+ pending_del_nr = 0;
+ btrfs_release_path(root, path);
+ goto search_again;
+ }
}
ret = 0;
error:
+ if (pending_del_nr) {
+ ret = btrfs_del_items(trans, root, path, pending_del_slot,
+ pending_del_nr);
+ }
btrfs_release_path(root, path);
btrfs_free_path(path);
inode->i_sb->s_dirt = 1;
{
char *kaddr;
struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
- struct btrfs_root *root = BTRFS_I(inode)->root;
u64 page_start = (u64)page->index << PAGE_CACHE_SHIFT;
u64 page_end = page_start + PAGE_CACHE_SIZE - 1;
- u64 existing_delalloc;
- u64 delalloc_start;
int ret = 0;
WARN_ON(!PageLocked(page));
set_page_extent_mapped(page);
lock_extent(io_tree, page_start, page_end, GFP_NOFS);
- delalloc_start = page_start;
- existing_delalloc = count_range_bits(&BTRFS_I(inode)->io_tree,
- &delalloc_start, page_end,
- PAGE_CACHE_SIZE, EXTENT_DELALLOC);
set_extent_delalloc(&BTRFS_I(inode)->io_tree, page_start,
page_end, GFP_NOFS);
- spin_lock(&root->fs_info->delalloc_lock);
- root->fs_info->delalloc_bytes += PAGE_CACHE_SIZE - existing_delalloc;
- spin_unlock(&root->fs_info->delalloc_lock);
-
if (zero_start != PAGE_CACHE_SIZE) {
kaddr = kmap(page);
memset(kaddr + zero_start, 0, PAGE_CACHE_SIZE - zero_start);
struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
u64 mask = root->sectorsize - 1;
- u64 pos = (inode->i_size + mask) & ~mask;
- u64 block_end = attr->ia_size | mask;
- u64 hole_start;
+ u64 hole_start = (inode->i_size + mask) & ~mask;
+ u64 block_end = (attr->ia_size + mask) & ~mask;
u64 hole_size;
u64 alloc_hint = 0;
- if (attr->ia_size <= pos)
+ if (attr->ia_size <= hole_start)
goto out;
- if (pos != inode->i_size)
- hole_start = pos + root->sectorsize;
- else
- hole_start = pos;
-
mutex_lock(&root->fs_info->fs_mutex);
err = btrfs_check_free_space(root, 1, 0);
mutex_unlock(&root->fs_info->fs_mutex);
btrfs_truncate_page(inode->i_mapping, inode->i_size);
- lock_extent(io_tree, pos, block_end, GFP_NOFS);
+ lock_extent(io_tree, hole_start, block_end - 1, GFP_NOFS);
hole_size = block_end - hole_start;
mutex_lock(&root->fs_info->fs_mutex);
trans = btrfs_start_transaction(root, 1);
btrfs_set_trans_block_group(trans, inode);
err = btrfs_drop_extents(trans, root, inode,
- pos, block_end, pos,
+ hole_start, block_end, hole_start,
&alloc_hint);
if (alloc_hint != EXTENT_MAP_INLINE) {
hole_start, 0, 0,
hole_size);
btrfs_drop_extent_cache(inode, hole_start,
- hole_size - 1);
+ (u64)-1);
btrfs_check_file(root, inode);
}
btrfs_end_transaction(trans, root);
mutex_unlock(&root->fs_info->fs_mutex);
- unlock_extent(io_tree, pos, block_end, GFP_NOFS);
+ unlock_extent(io_tree, hole_start, block_end - 1, GFP_NOFS);
if (err)
return err;
}
trans = btrfs_start_transaction(root, 1);
btrfs_set_trans_block_group(trans, inode);
- ret = btrfs_truncate_in_trans(trans, root, inode);
- if (ret)
- goto no_delete_lock;
- ret = btrfs_delete_xattrs(trans, root, inode);
- if (ret)
- goto no_delete_lock;
- ret = btrfs_free_inode(trans, root, inode);
+ ret = btrfs_truncate_in_trans(trans, root, inode, 0);
if (ret)
goto no_delete_lock;
+
nr = trans->blocks_used;
+ clear_inode(inode);
btrfs_end_transaction(trans, root);
mutex_unlock(&root->fs_info->fs_mutex);
struct btrfs_iget_args *args = p;
inode->i_ino = args->ino;
BTRFS_I(inode)->root = args->root;
+ BTRFS_I(inode)->delalloc_bytes = 0;
extent_map_tree_init(&BTRFS_I(inode)->extent_tree, GFP_NOFS);
extent_io_tree_init(&BTRFS_I(inode)->io_tree,
inode->i_mapping, GFP_NOFS);
+ extent_io_tree_init(&BTRFS_I(inode)->io_failure_tree,
+ inode->i_mapping, GFP_NOFS);
+ atomic_set(&BTRFS_I(inode)->ordered_writeback, 0);
return 0;
}
di = (struct btrfs_dir_item *)((char *)di + di_len);
}
}
- filp->f_pos = INT_LIMIT(typeof(filp->f_pos));
+ if (key_type == BTRFS_DIR_INDEX_KEY)
+ filp->f_pos = INT_LIMIT(typeof(filp->f_pos));
+ else
+ filp->f_pos++;
nopos:
ret = 0;
err:
static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
+ const char *name, int name_len,
+ u64 ref_objectid,
u64 objectid,
struct btrfs_block_group_cache *group,
int mode)
{
struct inode *inode;
struct btrfs_inode_item *inode_item;
+ struct btrfs_block_group_cache *new_inode_group;
struct btrfs_key *location;
struct btrfs_path *path;
+ struct btrfs_inode_ref *ref;
+ struct btrfs_key key[2];
+ u32 sizes[2];
+ unsigned long ptr;
int ret;
int owner;
extent_map_tree_init(&BTRFS_I(inode)->extent_tree, GFP_NOFS);
extent_io_tree_init(&BTRFS_I(inode)->io_tree,
inode->i_mapping, GFP_NOFS);
+ extent_io_tree_init(&BTRFS_I(inode)->io_failure_tree,
+ inode->i_mapping, GFP_NOFS);
+ atomic_set(&BTRFS_I(inode)->ordered_writeback, 0);
+ BTRFS_I(inode)->delalloc_bytes = 0;
BTRFS_I(inode)->root = root;
if (mode & S_IFDIR)
owner = 0;
else
owner = 1;
- group = btrfs_find_block_group(root, group, 0, 0, owner);
- BTRFS_I(inode)->block_group = group;
+ new_inode_group = btrfs_find_block_group(root, group, 0,
+ BTRFS_BLOCK_GROUP_METADATA, owner);
+ if (!new_inode_group) {
+ printk("find_block group failed\n");
+ new_inode_group = group;
+ }
+ BTRFS_I(inode)->block_group = new_inode_group;
BTRFS_I(inode)->flags = 0;
- ret = btrfs_insert_empty_inode(trans, root, path, objectid);
- if (ret)
+
+ key[0].objectid = objectid;
+ btrfs_set_key_type(&key[0], BTRFS_INODE_ITEM_KEY);
+ key[0].offset = 0;
+
+ key[1].objectid = objectid;
+ btrfs_set_key_type(&key[1], BTRFS_INODE_REF_KEY);
+ key[1].offset = ref_objectid;
+
+ sizes[0] = sizeof(struct btrfs_inode_item);
+ sizes[1] = name_len + sizeof(*ref);
+
+ ret = btrfs_insert_empty_items(trans, root, path, key, sizes, 2);
+ if (ret != 0)
goto fail;
+ if (objectid > root->highest_inode)
+ root->highest_inode = objectid;
+
inode->i_uid = current->fsuid;
inode->i_gid = current->fsgid;
inode->i_mode = mode;
inode_item = btrfs_item_ptr(path->nodes[0], path->slots[0],
struct btrfs_inode_item);
fill_inode_item(path->nodes[0], inode_item, inode);
+
+ ref = btrfs_item_ptr(path->nodes[0], path->slots[0] + 1,
+ struct btrfs_inode_ref);
+ btrfs_set_inode_ref_name_len(path->nodes[0], ref, name_len);
+ ptr = (unsigned long)(ref + 1);
+ write_extent_buffer(path->nodes[0], name, ptr, name_len);
+
btrfs_mark_buffer_dirty(path->nodes[0]);
btrfs_free_path(path);
}
static int btrfs_add_link(struct btrfs_trans_handle *trans,
- struct dentry *dentry, struct inode *inode)
+ struct dentry *dentry, struct inode *inode,
+ int add_backref)
{
int ret;
struct btrfs_key key;
dentry->d_parent->d_inode->i_ino,
&key, btrfs_inode_type(inode));
if (ret == 0) {
- ret = btrfs_insert_inode_ref(trans, root,
- dentry->d_name.name,
- dentry->d_name.len,
- inode->i_ino,
- dentry->d_parent->d_inode->i_ino);
+ if (add_backref) {
+ ret = btrfs_insert_inode_ref(trans, root,
+ dentry->d_name.name,
+ dentry->d_name.len,
+ inode->i_ino,
+ dentry->d_parent->d_inode->i_ino);
+ }
parent_inode = dentry->d_parent->d_inode;
parent_inode->i_size += dentry->d_name.len * 2;
parent_inode->i_mtime = parent_inode->i_ctime = CURRENT_TIME;
}
static int btrfs_add_nondir(struct btrfs_trans_handle *trans,
- struct dentry *dentry, struct inode *inode)
+ struct dentry *dentry, struct inode *inode,
+ int backref)
{
- int err = btrfs_add_link(trans, dentry, inode);
+ int err = btrfs_add_link(trans, dentry, inode, backref);
if (!err) {
d_instantiate(dentry, inode);
return 0;
goto out_unlock;
}
- inode = btrfs_new_inode(trans, root, objectid,
+ inode = btrfs_new_inode(trans, root, dentry->d_name.name,
+ dentry->d_name.len,
+ dentry->d_parent->d_inode->i_ino, objectid,
BTRFS_I(dir)->block_group, mode);
err = PTR_ERR(inode);
if (IS_ERR(inode))
goto out_unlock;
btrfs_set_trans_block_group(trans, inode);
- err = btrfs_add_nondir(trans, dentry, inode);
+ err = btrfs_add_nondir(trans, dentry, inode, 0);
if (err)
drop_inode = 1;
else {
goto out_unlock;
}
- inode = btrfs_new_inode(trans, root, objectid,
- BTRFS_I(dir)->block_group, mode);
+ inode = btrfs_new_inode(trans, root, dentry->d_name.name,
+ dentry->d_name.len,
+ dentry->d_parent->d_inode->i_ino,
+ objectid, BTRFS_I(dir)->block_group, mode);
err = PTR_ERR(inode);
if (IS_ERR(inode))
goto out_unlock;
btrfs_set_trans_block_group(trans, inode);
- err = btrfs_add_nondir(trans, dentry, inode);
+ err = btrfs_add_nondir(trans, dentry, inode, 0);
if (err)
drop_inode = 1;
else {
inode->i_mapping->a_ops = &btrfs_aops;
+ inode->i_mapping->backing_dev_info = &root->fs_info->bdi;
inode->i_fop = &btrfs_file_operations;
inode->i_op = &btrfs_file_inode_operations;
extent_map_tree_init(&BTRFS_I(inode)->extent_tree, GFP_NOFS);
extent_io_tree_init(&BTRFS_I(inode)->io_tree,
inode->i_mapping, GFP_NOFS);
+ extent_io_tree_init(&BTRFS_I(inode)->io_failure_tree,
+ inode->i_mapping, GFP_NOFS);
+ BTRFS_I(inode)->delalloc_bytes = 0;
+ atomic_set(&BTRFS_I(inode)->ordered_writeback, 0);
BTRFS_I(inode)->io_tree.ops = &btrfs_extent_io_ops;
}
dir->i_sb->s_dirt = 1;
btrfs_set_trans_block_group(trans, dir);
atomic_inc(&inode->i_count);
- err = btrfs_add_nondir(trans, dentry, inode);
+ err = btrfs_add_nondir(trans, dentry, inode, 1);
if (err)
drop_inode = 1;
goto out_unlock;
}
- inode = btrfs_new_inode(trans, root, objectid,
+ inode = btrfs_new_inode(trans, root, dentry->d_name.name,
+ dentry->d_name.len,
+ dentry->d_parent->d_inode->i_ino, objectid,
BTRFS_I(dir)->block_group, S_IFDIR | mode);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
if (err)
goto out_fail;
- err = btrfs_add_link(trans, dentry, inode);
+ err = btrfs_add_link(trans, dentry, inode, 0);
if (err)
goto out_fail;
return err;
}
+static int merge_extent_mapping(struct extent_map_tree *em_tree,
+ struct extent_map *existing,
+ struct extent_map *em)
+{
+ u64 start_diff;
+ u64 new_end;
+ int ret = 0;
+ int real_blocks = existing->block_start < EXTENT_MAP_LAST_BYTE;
+
+ if (real_blocks && em->block_start >= EXTENT_MAP_LAST_BYTE)
+ goto invalid;
+
+ if (!real_blocks && em->block_start != existing->block_start)
+ goto invalid;
+
+ new_end = max(existing->start + existing->len, em->start + em->len);
+
+ if (existing->start >= em->start) {
+ if (em->start + em->len < existing->start)
+ goto invalid;
+
+ start_diff = existing->start - em->start;
+ if (real_blocks && em->block_start + start_diff !=
+ existing->block_start)
+ goto invalid;
+
+ em->len = new_end - em->start;
+
+ remove_extent_mapping(em_tree, existing);
+ /* free for the tree */
+ free_extent_map(existing);
+ ret = add_extent_mapping(em_tree, em);
+
+ } else if (em->start > existing->start) {
+
+ if (existing->start + existing->len < em->start)
+ goto invalid;
+
+ start_diff = em->start - existing->start;
+ if (real_blocks && existing->block_start + start_diff !=
+ em->block_start)
+ goto invalid;
+
+ remove_extent_mapping(em_tree, existing);
+ em->block_start = existing->block_start;
+ em->start = existing->start;
+ em->len = new_end - existing->start;
+ free_extent_map(existing);
+
+ ret = add_extent_mapping(em_tree, em);
+ } else {
+ goto invalid;
+ }
+ return ret;
+
+invalid:
+ printk("invalid extent map merge [%Lu %Lu %Lu] [%Lu %Lu %Lu]\n",
+ existing->start, existing->len, existing->block_start,
+ em->start, em->len, em->block_start);
+ return -EIO;
+}
+
struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
size_t pg_offset, u64 start, u64 len,
int create)
spin_unlock(&em_tree->lock);
if (em) {
- if (em->start > start) {
- printk("get_extent lookup [%Lu %Lu] em [%Lu %Lu]\n",
- start, len, em->start, em->len);
- WARN_ON(1);
- }
- if (em->block_start == EXTENT_MAP_INLINE && page)
+ if (em->start > start || em->start + em->len <= start)
+ free_extent_map(em);
+ else if (em->block_start == EXTENT_MAP_INLINE && page)
free_extent_map(em);
else
goto out;
err = 0;
spin_lock(&em_tree->lock);
ret = add_extent_mapping(em_tree, em);
+ /* it is possible that someone inserted the extent into the tree
+ * while we had the lock dropped. It is also possible that
+ * an overlapping map exists in the tree
+ */
if (ret == -EEXIST) {
- free_extent_map(em);
- em = lookup_extent_mapping(em_tree, start, len);
- if (!em) {
- err = -EIO;
- printk("failing to insert %Lu %Lu\n", start, len);
+ struct extent_map *existing;
+ existing = lookup_extent_mapping(em_tree, start, len);
+ if (existing && (existing->start > start ||
+ existing->start + existing->len <= start)) {
+ free_extent_map(existing);
+ existing = NULL;
+ }
+ if (!existing) {
+ existing = lookup_extent_mapping(em_tree, em->start,
+ em->len);
+ if (existing) {
+ err = merge_extent_mapping(em_tree, existing,
+ em);
+ free_extent_map(existing);
+ if (err) {
+ free_extent_map(em);
+ em = NULL;
+ }
+ } else {
+ err = -EIO;
+ printk("failing to insert %Lu %Lu\n",
+ start, len);
+ free_extent_map(em);
+ em = NULL;
+ }
+ } else {
+ free_extent_map(em);
+ em = existing;
}
}
spin_unlock(&em_tree->lock);
return em;
}
+#if 0 /* waiting for O_DIRECT reads */
+static int btrfs_get_block(struct inode *inode, sector_t iblock,
+ struct buffer_head *bh_result, int create)
+{
+ struct extent_map *em;
+ u64 start = (u64)iblock << inode->i_blkbits;
+ struct btrfs_multi_bio *multi = NULL;
+ struct btrfs_root *root = BTRFS_I(inode)->root;
+ u64 len;
+ u64 logical;
+ u64 map_length;
+ int ret = 0;
+
+ em = btrfs_get_extent(inode, NULL, 0, start, bh_result->b_size, 0);
+
+ if (!em || IS_ERR(em))
+ goto out;
+
+ if (em->start > start || em->start + em->len <= start) {
+ goto out;
+ }
+
+ if (em->block_start == EXTENT_MAP_INLINE) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ len = em->start + em->len - start;
+ len = min_t(u64, len, INT_LIMIT(typeof(bh_result->b_size)));
+
+ if (em->block_start == EXTENT_MAP_HOLE ||
+ em->block_start == EXTENT_MAP_DELALLOC) {
+ bh_result->b_size = len;
+ goto out;
+ }
+
+ logical = start - em->start;
+ logical = em->block_start + logical;
+
+ map_length = len;
+ ret = btrfs_map_block(&root->fs_info->mapping_tree, READ,
+ logical, &map_length, &multi, 0);
+ BUG_ON(ret);
+ bh_result->b_blocknr = multi->stripes[0].physical >> inode->i_blkbits;
+ bh_result->b_size = min(map_length, len);
+
+ bh_result->b_bdev = multi->stripes[0].dev->bdev;
+ set_buffer_mapped(bh_result);
+ kfree(multi);
+out:
+ free_extent_map(em);
+ return ret;
+}
+#endif
+
+static ssize_t btrfs_direct_IO(int rw, struct kiocb *iocb,
+ const struct iovec *iov, loff_t offset,
+ unsigned long nr_segs)
+{
+ return -EINVAL;
+#if 0
+ struct file *file = iocb->ki_filp;
+ struct inode *inode = file->f_mapping->host;
+
+ if (rw == WRITE)
+ return -EINVAL;
+
+ return blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
+ offset, nr_segs, btrfs_get_block, NULL);
+#endif
+}
+
static sector_t btrfs_bmap(struct address_space *mapping, sector_t iblock)
{
return extent_bmap(mapping, iblock, btrfs_get_extent);
map = &BTRFS_I(page->mapping->host)->extent_tree;
ret = try_release_extent_mapping(map, tree, page, gfp_flags);
if (ret == 1) {
+ invalidate_extent_lru(tree, page_offset(page), PAGE_CACHE_SIZE);
ClearPagePrivate(page);
set_page_private(page, 0);
page_cache_release(page);
tree = &BTRFS_I(page->mapping->host)->io_tree;
extent_invalidatepage(tree, page, offset);
btrfs_releasepage(page, GFP_NOFS);
+ if (PagePrivate(page)) {
+ invalidate_extent_lru(tree, page_offset(page), PAGE_CACHE_SIZE);
+ ClearPagePrivate(page);
+ set_page_private(page, 0);
+ page_cache_release(page);
+ }
}
/*
btrfs_set_trans_block_group(trans, inode);
/* FIXME, add redo link to tree so we don't leak on crash */
- ret = btrfs_truncate_in_trans(trans, root, inode);
+ ret = btrfs_truncate_in_trans(trans, root, inode,
+ BTRFS_EXTENT_DATA_KEY);
btrfs_update_inode(trans, root, inode);
nr = trans->blocks_used;
trans = btrfs_start_transaction(new_root, 1);
BUG_ON(!trans);
- inode = btrfs_new_inode(trans, new_root, new_dirid,
+ inode = btrfs_new_inode(trans, new_root, "..", 2, new_dirid,
+ new_dirid,
BTRFS_I(dir)->block_group, S_IFDIR | 0700);
if (IS_ERR(inode))
goto fail;
unsigned long ra_index = 0;
u64 page_start;
u64 page_end;
- u64 delalloc_start;
- u64 existing_delalloc;
unsigned long i;
int ret;
page_end = page_start + PAGE_CACHE_SIZE - 1;
lock_extent(io_tree, page_start, page_end, GFP_NOFS);
- delalloc_start = page_start;
- existing_delalloc =
- count_range_bits(&BTRFS_I(inode)->io_tree,
- &delalloc_start, page_end,
- PAGE_CACHE_SIZE, EXTENT_DELALLOC);
set_extent_delalloc(io_tree, page_start,
page_end, GFP_NOFS);
- spin_lock(&root->fs_info->delalloc_lock);
- root->fs_info->delalloc_bytes += PAGE_CACHE_SIZE -
- existing_delalloc;
- spin_unlock(&root->fs_info->delalloc_lock);
-
unlock_extent(io_tree, page_start, page_end, GFP_NOFS);
set_page_dirty(page);
unlock_page(page);
struct inode *inode = dentry->d_inode;
generic_fillattr(inode, stat);
stat->blksize = PAGE_CACHE_SIZE;
+ stat->blocks = inode->i_blocks + (BTRFS_I(inode)->delalloc_bytes >> 9);
return 0;
}
if (ret)
goto out_fail;
}
- ret = btrfs_add_link(trans, new_dentry, old_inode);
+ ret = btrfs_add_link(trans, new_dentry, old_inode, 1);
if (ret)
goto out_fail;
goto out_unlock;
}
- inode = btrfs_new_inode(trans, root, objectid,
+ inode = btrfs_new_inode(trans, root, dentry->d_name.name,
+ dentry->d_name.len,
+ dentry->d_parent->d_inode->i_ino, objectid,
BTRFS_I(dir)->block_group, S_IFLNK|S_IRWXUGO);
err = PTR_ERR(inode);
if (IS_ERR(inode))
goto out_unlock;
btrfs_set_trans_block_group(trans, inode);
- err = btrfs_add_nondir(trans, dentry, inode);
+ err = btrfs_add_nondir(trans, dentry, inode, 0);
if (err)
drop_inode = 1;
else {
inode->i_mapping->a_ops = &btrfs_aops;
+ inode->i_mapping->backing_dev_info = &root->fs_info->bdi;
inode->i_fop = &btrfs_file_operations;
inode->i_op = &btrfs_file_inode_operations;
extent_map_tree_init(&BTRFS_I(inode)->extent_tree, GFP_NOFS);
extent_io_tree_init(&BTRFS_I(inode)->io_tree,
inode->i_mapping, GFP_NOFS);
+ extent_io_tree_init(&BTRFS_I(inode)->io_failure_tree,
+ inode->i_mapping, GFP_NOFS);
+ BTRFS_I(inode)->delalloc_bytes = 0;
+ atomic_set(&BTRFS_I(inode)->ordered_writeback, 0);
BTRFS_I(inode)->io_tree.ops = &btrfs_extent_io_ops;
}
dir->i_sb->s_dirt = 1;
inode->i_op = &btrfs_symlink_inode_operations;
inode->i_mapping->a_ops = &btrfs_symlink_aops;
+ inode->i_mapping->backing_dev_info = &root->fs_info->bdi;
inode->i_size = name_len - 1;
err = btrfs_update_inode(trans, root, inode);
if (err)
btrfs_throttle(root);
return err;
}
+
static int btrfs_permission(struct inode *inode, int mask,
struct nameidata *nd)
{
static struct extent_io_ops btrfs_extent_io_ops = {
.fill_delalloc = run_delalloc_range,
- .writepage_io_hook = btrfs_writepage_io_hook,
+ .submit_bio_hook = btrfs_submit_bio_hook,
+ .merge_bio_hook = btrfs_merge_bio_hook,
.readpage_io_hook = btrfs_readpage_io_hook,
.readpage_end_io_hook = btrfs_readpage_end_io_hook,
+ .readpage_io_failed_hook = btrfs_readpage_io_failed_hook,
+ .set_bit_hook = btrfs_set_bit_hook,
+ .clear_bit_hook = btrfs_clear_bit_hook,
};
static struct address_space_operations btrfs_aops = {
.readpages = btrfs_readpages,
.sync_page = block_sync_page,
.bmap = btrfs_bmap,
+ .direct_IO = btrfs_direct_IO,
.invalidatepage = btrfs_invalidatepage,
.releasepage = btrfs_releasepage,
.set_page_dirty = __set_page_dirty_nobuffers,