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Btrfs: corruption hunt continues 

Signed-off-by: Chris Mason <chris.mason@oracle.com>
hifive-unleashed-5.1
Chris Mason 2007-03-30 14:27:56 -04:00 committed by David Woodhouse
parent 22b0ebda6c
commit d602557953
11 changed files with 187 additions and 105 deletions
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9
fs/btrfs/bit-radix.c
View File

@ -16,12 +16,14 @@ int set_radix_bit(struct radix_tree_root *radix, unsigned long bit)
bits = radix_tree_lookup(radix, slot);
if (!bits) {
bits = kmalloc(BIT_ARRAY_BYTES, GFP_NOIO);
bits = kmalloc(BIT_ARRAY_BYTES, GFP_NOFS);
if (!bits)
return -ENOMEM;
memset(bits + 1, 0, BIT_ARRAY_BYTES - sizeof(unsigned long));
bits[0] = slot;
radix_tree_preload(GFP_NOFS);
ret = radix_tree_insert(radix, slot, bits);
radix_tree_preload_end();
if (ret)
return ret;
}
@ -59,7 +61,7 @@ int clear_radix_bit(struct radix_tree_root *radix, unsigned long bit)
if (!bits)
return 0;
clear_bit(bit_slot, bits + 1);
#if 0
for (i = 1; i < BIT_ARRAY_BYTES / sizeof(unsigned long); i++) {
if (bits[i]) {
empty = 0;
@ -69,8 +71,11 @@ int clear_radix_bit(struct radix_tree_root *radix, unsigned long bit)
if (empty) {
bits = radix_tree_delete(radix, slot);
synchronize_rcu();
BUG_ON(!bits);
kfree(bits);
}
#endif
return 0;
}

201
fs/btrfs/ctree.c
View File

@ -51,7 +51,7 @@ static int btrfs_cow_block(struct btrfs_trans_handle *trans, struct btrfs_root
btrfs_set_header_blocknr(&cow_node->header, cow->b_blocknr);
btrfs_set_header_generation(&cow_node->header, trans->transid);
*cow_ret = cow;
mark_buffer_dirty(cow);
btrfs_mark_buffer_dirty(cow);
btrfs_inc_ref(trans, root, buf);
if (buf == root->node) {
root->node = cow;
@ -62,7 +62,7 @@ static int btrfs_cow_block(struct btrfs_trans_handle *trans, struct btrfs_root
} else {
btrfs_set_node_blockptr(btrfs_buffer_node(parent), parent_slot,
cow->b_blocknr);
mark_buffer_dirty(parent);
btrfs_mark_buffer_dirty(parent);
btrfs_free_extent(trans, root, buf->b_blocknr, 1, 1);
}
btrfs_block_release(root, buf);
@ -312,11 +312,12 @@ static int balance_level(struct btrfs_trans_handle *trans, struct btrfs_root
BUG_ON(!child);
root->node = child;
path->nodes[level] = NULL;
clean_tree_block(trans, root, mid_buf);
wait_on_buffer(mid_buf);
/* once for the path */
btrfs_block_release(root, mid_buf);
/* once for the root ptr */
btrfs_block_release(root, mid_buf);
clean_tree_block(trans, root, mid_buf);
return btrfs_free_extent(trans, root, blocknr, 1, 1);
}
parent = btrfs_buffer_node(parent_buf);
@ -351,8 +352,9 @@ static int balance_level(struct btrfs_trans_handle *trans, struct btrfs_root
ret = wret;
if (btrfs_header_nritems(&right->header) == 0) {
u64 blocknr = right_buf->b_blocknr;
btrfs_block_release(root, right_buf);
clean_tree_block(trans, root, right_buf);
wait_on_buffer(right_buf);
btrfs_block_release(root, right_buf);
right_buf = NULL;
right = NULL;
wret = del_ptr(trans, root, path, level + 1, pslot +
@ -363,10 +365,11 @@ static int balance_level(struct btrfs_trans_handle *trans, struct btrfs_root
if (wret)
ret = wret;
} else {
memcpy(&parent->ptrs[pslot + 1].key,
&right->ptrs[0].key,
sizeof(struct btrfs_disk_key));
mark_buffer_dirty(parent_buf);
btrfs_memcpy(root, parent,
&parent->ptrs[pslot + 1].key,
&right->ptrs[0].key,
sizeof(struct btrfs_disk_key));
btrfs_mark_buffer_dirty(parent_buf);
}
}
if (btrfs_header_nritems(&mid->header) == 1) {
@ -388,8 +391,9 @@ static int balance_level(struct btrfs_trans_handle *trans, struct btrfs_root
if (btrfs_header_nritems(&mid->header) == 0) {
/* we've managed to empty the middle node, drop it */
u64 blocknr = mid_buf->b_blocknr;
btrfs_block_release(root, mid_buf);
clean_tree_block(trans, root, mid_buf);
wait_on_buffer(mid_buf);
btrfs_block_release(root, mid_buf);
mid_buf = NULL;
mid = NULL;
wret = del_ptr(trans, root, path, level + 1, pslot);
@ -400,9 +404,10 @@ static int balance_level(struct btrfs_trans_handle *trans, struct btrfs_root
ret = wret;
} else {
/* update the parent key to reflect our changes */
memcpy(&parent->ptrs[pslot].key, &mid->ptrs[0].key,
sizeof(struct btrfs_disk_key));
mark_buffer_dirty(parent_buf);
btrfs_memcpy(root, parent,
&parent->ptrs[pslot].key, &mid->ptrs[0].key,
sizeof(struct btrfs_disk_key));
btrfs_mark_buffer_dirty(parent_buf);
}
/* update the path */
@ -544,8 +549,8 @@ static int fixup_low_keys(struct btrfs_trans_handle *trans, struct btrfs_root
if (!path->nodes[i])
break;
t = btrfs_buffer_node(path->nodes[i]);
memcpy(&t->ptrs[tslot].key, key, sizeof(*key));
mark_buffer_dirty(path->nodes[i]);
btrfs_memcpy(root, t, &t->ptrs[tslot].key, key, sizeof(*key));
btrfs_mark_buffer_dirty(path->nodes[i]);
if (tslot != 0)
break;
}
@ -580,17 +585,17 @@ static int push_node_left(struct btrfs_trans_handle *trans, struct btrfs_root
if (src_nritems < push_items)
push_items = src_nritems;
memcpy(dst->ptrs + dst_nritems, src->ptrs,
push_items * sizeof(struct btrfs_key_ptr));
btrfs_memcpy(root, dst, dst->ptrs + dst_nritems, src->ptrs,
push_items * sizeof(struct btrfs_key_ptr));
if (push_items < src_nritems) {
memmove(src->ptrs, src->ptrs + push_items,
btrfs_memmove(root, src, src->ptrs, src->ptrs + push_items,
(src_nritems - push_items) *
sizeof(struct btrfs_key_ptr));
}
btrfs_set_header_nritems(&src->header, src_nritems - push_items);
btrfs_set_header_nritems(&dst->header, dst_nritems + push_items);
mark_buffer_dirty(src_buf);
mark_buffer_dirty(dst_buf);
btrfs_mark_buffer_dirty(src_buf);
btrfs_mark_buffer_dirty(dst_buf);
return ret;
}
@ -629,16 +634,18 @@ static int balance_node_right(struct btrfs_trans_handle *trans, struct
if (max_push < push_items)
push_items = max_push;
memmove(dst->ptrs + push_items, dst->ptrs,
dst_nritems * sizeof(struct btrfs_key_ptr));
memcpy(dst->ptrs, src->ptrs + src_nritems - push_items,
push_items * sizeof(struct btrfs_key_ptr));
btrfs_memmove(root, dst, dst->ptrs + push_items, dst->ptrs,
dst_nritems * sizeof(struct btrfs_key_ptr));
btrfs_memcpy(root, dst, dst->ptrs,
src->ptrs + src_nritems - push_items,
push_items * sizeof(struct btrfs_key_ptr));
btrfs_set_header_nritems(&src->header, src_nritems - push_items);
btrfs_set_header_nritems(&dst->header, dst_nritems + push_items);
mark_buffer_dirty(src_buf);
mark_buffer_dirty(dst_buf);
btrfs_mark_buffer_dirty(src_buf);
btrfs_mark_buffer_dirty(dst_buf);
return ret;
}
@ -674,10 +681,11 @@ static int insert_new_root(struct btrfs_trans_handle *trans, struct btrfs_root
lower_key = &((struct btrfs_leaf *)lower)->items[0].key;
else
lower_key = &lower->ptrs[0].key;
memcpy(&c->ptrs[0].key, lower_key, sizeof(struct btrfs_disk_key));
btrfs_memcpy(root, c, &c->ptrs[0].key, lower_key,
sizeof(struct btrfs_disk_key));
btrfs_set_node_blockptr(c, 0, path->nodes[level - 1]->b_blocknr);
mark_buffer_dirty(t);
btrfs_mark_buffer_dirty(t);
/* the super has an extra ref to root->node */
btrfs_block_release(root, root->node);
@ -712,13 +720,15 @@ static int insert_ptr(struct btrfs_trans_handle *trans, struct btrfs_root
if (nritems == BTRFS_NODEPTRS_PER_BLOCK(root))
BUG();
if (slot != nritems) {
memmove(lower->ptrs + slot + 1, lower->ptrs + slot,
(nritems - slot) * sizeof(struct btrfs_key_ptr));
btrfs_memmove(root, lower, lower->ptrs + slot + 1,
lower->ptrs + slot,
(nritems - slot) * sizeof(struct btrfs_key_ptr));
}
memcpy(&lower->ptrs[slot].key, key, sizeof(struct btrfs_disk_key));
btrfs_memcpy(root, lower, &lower->ptrs[slot].key,
key, sizeof(struct btrfs_disk_key));
btrfs_set_node_blockptr(lower, slot, blocknr);
btrfs_set_header_nritems(&lower->header, nritems + 1);
mark_buffer_dirty(path->nodes[level]);
btrfs_mark_buffer_dirty(path->nodes[level]);
return 0;
}
@ -761,14 +771,14 @@ static int split_node(struct btrfs_trans_handle *trans, struct btrfs_root
btrfs_set_header_parentid(&split->header,
btrfs_header_parentid(btrfs_buffer_header(root->node)));
mid = (c_nritems + 1) / 2;
memcpy(split->ptrs, c->ptrs + mid,
(c_nritems - mid) * sizeof(struct btrfs_key_ptr));
btrfs_memcpy(root, split, split->ptrs, c->ptrs + mid,
(c_nritems - mid) * sizeof(struct btrfs_key_ptr));
btrfs_set_header_nritems(&split->header, c_nritems - mid);
btrfs_set_header_nritems(&c->header, mid);
ret = 0;
mark_buffer_dirty(t);
mark_buffer_dirty(split_buffer);
btrfs_mark_buffer_dirty(t);
btrfs_mark_buffer_dirty(split_buffer);
wret = insert_ptr(trans, root, path, &split->ptrs[0].key,
split_buffer->b_blocknr, path->slots[level + 1] + 1,
level + 1);
@ -875,17 +885,22 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root
push_space = btrfs_item_end(left->items + left_nritems - push_items);
push_space -= leaf_data_end(root, left);
/* make room in the right data area */
memmove(btrfs_leaf_data(right) + leaf_data_end(root, right) -
push_space, btrfs_leaf_data(right) + leaf_data_end(root, right),
BTRFS_LEAF_DATA_SIZE(root) - leaf_data_end(root, right));
btrfs_memmove(root, right, btrfs_leaf_data(right) +
leaf_data_end(root, right) - push_space,
btrfs_leaf_data(right) +
leaf_data_end(root, right), BTRFS_LEAF_DATA_SIZE(root) -
leaf_data_end(root, right));
/* copy from the left data area */
memcpy(btrfs_leaf_data(right) + BTRFS_LEAF_DATA_SIZE(root) - push_space,
btrfs_leaf_data(left) + leaf_data_end(root, left), push_space);
memmove(right->items + push_items, right->items,
btrfs_memcpy(root, right, btrfs_leaf_data(right) +
BTRFS_LEAF_DATA_SIZE(root) - push_space,
btrfs_leaf_data(left) + leaf_data_end(root, left),
push_space);
btrfs_memmove(root, right, right->items + push_items, right->items,
right_nritems * sizeof(struct btrfs_item));
/* copy the items from left to right */
memcpy(right->items, left->items + left_nritems - push_items,
push_items * sizeof(struct btrfs_item));
btrfs_memcpy(root, right, right->items, left->items +
left_nritems - push_items,
push_items * sizeof(struct btrfs_item));
/* update the item pointers */
right_nritems += push_items;
@ -899,11 +914,11 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root
left_nritems -= push_items;
btrfs_set_header_nritems(&left->header, left_nritems);
mark_buffer_dirty(left_buf);
mark_buffer_dirty(right_buf);
memcpy(&upper_node->ptrs[slot + 1].key,
btrfs_mark_buffer_dirty(left_buf);
btrfs_mark_buffer_dirty(right_buf);
btrfs_memcpy(root, upper_node, &upper_node->ptrs[slot + 1].key,
&right->items[0].key, sizeof(struct btrfs_disk_key));
mark_buffer_dirty(upper);
btrfs_mark_buffer_dirty(upper);
/* then fixup the leaf pointer in the path */
if (path->slots[0] >= left_nritems) {
@ -977,14 +992,16 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root
return 1;
}
/* push data from right to left */
memcpy(left->items + btrfs_header_nritems(&left->header),
right->items, push_items * sizeof(struct btrfs_item));
btrfs_memcpy(root, left, left->items +
btrfs_header_nritems(&left->header),
right->items, push_items * sizeof(struct btrfs_item));
push_space = BTRFS_LEAF_DATA_SIZE(root) -
btrfs_item_offset(right->items + push_items -1);
memcpy(btrfs_leaf_data(left) + leaf_data_end(root, left) - push_space,
btrfs_leaf_data(right) +
btrfs_item_offset(right->items + push_items - 1),
push_space);
btrfs_memcpy(root, left, btrfs_leaf_data(left) +
leaf_data_end(root, left) - push_space,
btrfs_leaf_data(right) +
btrfs_item_offset(right->items + push_items - 1),
push_space);
old_left_nritems = btrfs_header_nritems(&left->header);
BUG_ON(old_left_nritems < 0);
@ -1000,10 +1017,11 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root
/* fixup right node */
push_space = btrfs_item_offset(right->items + push_items - 1) -
leaf_data_end(root, right);
memmove(btrfs_leaf_data(right) + BTRFS_LEAF_DATA_SIZE(root) -
push_space, btrfs_leaf_data(right) +
leaf_data_end(root, right), push_space);
memmove(right->items, right->items + push_items,
btrfs_memmove(root, right, btrfs_leaf_data(right) +
BTRFS_LEAF_DATA_SIZE(root) - push_space,
btrfs_leaf_data(right) +
leaf_data_end(root, right), push_space);
btrfs_memmove(root, right, right->items, right->items + push_items,
(btrfs_header_nritems(&right->header) - push_items) *
sizeof(struct btrfs_item));
btrfs_set_header_nritems(&right->header,
@ -1017,8 +1035,8 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root
push_space = btrfs_item_offset(right->items + i);
}
mark_buffer_dirty(t);
mark_buffer_dirty(right_buf);
btrfs_mark_buffer_dirty(t);
btrfs_mark_buffer_dirty(right_buf);
wret = fixup_low_keys(trans, root, path, &right->items[0].key, 1);
if (wret)
@ -1110,11 +1128,12 @@ static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root
btrfs_header_parentid(btrfs_buffer_header(root->node)));
data_copy_size = btrfs_item_end(l->items + mid) -
leaf_data_end(root, l);
memcpy(right->items, l->items + mid,
(nritems - mid) * sizeof(struct btrfs_item));
memcpy(btrfs_leaf_data(right) + BTRFS_LEAF_DATA_SIZE(root) -
data_copy_size, btrfs_leaf_data(l) +
leaf_data_end(root, l), data_copy_size);
btrfs_memcpy(root, right, right->items, l->items + mid,
(nritems - mid) * sizeof(struct btrfs_item));
btrfs_memcpy(root, right,
btrfs_leaf_data(right) + BTRFS_LEAF_DATA_SIZE(root) -
data_copy_size, btrfs_leaf_data(l) +
leaf_data_end(root, l), data_copy_size);
rt_data_off = BTRFS_LEAF_DATA_SIZE(root) -
btrfs_item_end(l->items + mid);
@ -1129,8 +1148,8 @@ static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root
right_buffer->b_blocknr, path->slots[1] + 1, 1);
if (wret)
ret = wret;
mark_buffer_dirty(right_buffer);
mark_buffer_dirty(l_buf);
btrfs_mark_buffer_dirty(right_buffer);
btrfs_mark_buffer_dirty(l_buf);
BUG_ON(path->slots[0] != slot);
if (mid <= slot) {
btrfs_block_release(root, path->nodes[0]);
@ -1200,22 +1219,23 @@ int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, struct btrfs_root
}
/* shift the items */
memmove(leaf->items + slot + 1, leaf->items + slot,
(nritems - slot) * sizeof(struct btrfs_item));
btrfs_memmove(root, leaf, leaf->items + slot + 1,
leaf->items + slot,
(nritems - slot) * sizeof(struct btrfs_item));
/* shift the data */
memmove(btrfs_leaf_data(leaf) + data_end - data_size,
btrfs_leaf_data(leaf) +
data_end, old_data - data_end);
btrfs_memmove(root, leaf, btrfs_leaf_data(leaf) +
data_end - data_size, btrfs_leaf_data(leaf) +
data_end, old_data - data_end);
data_end = old_data;
}
/* setup the item for the new data */
memcpy(&leaf->items[slot].key, &disk_key,
sizeof(struct btrfs_disk_key));
btrfs_memcpy(root, leaf, &leaf->items[slot].key, &disk_key,
sizeof(struct btrfs_disk_key));
btrfs_set_item_offset(leaf->items + slot, data_end - data_size);
btrfs_set_item_size(leaf->items + slot, data_size);
btrfs_set_header_nritems(&leaf->header, nritems + 1);
mark_buffer_dirty(leaf_buf);
btrfs_mark_buffer_dirty(leaf_buf);
ret = 0;
if (slot == 0)
@ -1245,8 +1265,9 @@ int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
if (!ret) {
ptr = btrfs_item_ptr(btrfs_buffer_leaf(path.nodes[0]),
path.slots[0], u8);
memcpy(ptr, data, data_size);
mark_buffer_dirty(path.nodes[0]);
btrfs_memcpy(root, path.nodes[0]->b_data,
ptr, data, data_size);
btrfs_mark_buffer_dirty(path.nodes[0]);
}
btrfs_release_path(root, &path);
return ret;
@ -1271,8 +1292,10 @@ static int del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
node = btrfs_buffer_node(parent);
nritems = btrfs_header_nritems(&node->header);
if (slot != nritems -1) {
memmove(node->ptrs + slot, node->ptrs + slot + 1,
sizeof(struct btrfs_key_ptr) * (nritems - slot - 1));
btrfs_memmove(root, node, node->ptrs + slot,
node->ptrs + slot + 1,
sizeof(struct btrfs_key_ptr) *
(nritems - slot - 1));
}
nritems--;
btrfs_set_header_nritems(&node->header, nritems);
@ -1287,7 +1310,7 @@ static int del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
if (wret)
ret = wret;
}
mark_buffer_dirty(parent);
btrfs_mark_buffer_dirty(parent);
return ret;
}
@ -1317,16 +1340,18 @@ int btrfs_del_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
if (slot != nritems - 1) {
int i;
int data_end = leaf_data_end(root, leaf);
memmove(btrfs_leaf_data(leaf) + data_end + dsize,
btrfs_leaf_data(leaf) + data_end,
doff - data_end);
btrfs_memmove(root, leaf, btrfs_leaf_data(leaf) +
data_end + dsize,
btrfs_leaf_data(leaf) + data_end,
doff - data_end);
for (i = slot + 1; i < nritems; i++) {
u32 ioff = btrfs_item_offset(leaf->items + i);
btrfs_set_item_offset(leaf->items + i, ioff + dsize);
}
memmove(leaf->items + slot, leaf->items + slot + 1,
sizeof(struct btrfs_item) *
(nritems - slot - 1));
btrfs_memmove(root, leaf, leaf->items + slot,
leaf->items + slot + 1,
sizeof(struct btrfs_item) *
(nritems - slot - 1));
}
btrfs_set_header_nritems(&leaf->header, nritems - 1);
nritems--;
@ -1336,6 +1361,7 @@ int btrfs_del_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
btrfs_set_header_level(&leaf->header, 0);
} else {
clean_tree_block(trans, root, leaf_buf);
wait_on_buffer(leaf_buf);
wret = del_ptr(trans, root, path, 1, path->slots[1]);
if (wret)
ret = wret;
@ -1373,6 +1399,7 @@ int btrfs_del_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
if (btrfs_header_nritems(&leaf->header) == 0) {
u64 blocknr = leaf_buf->b_blocknr;
clean_tree_block(trans, root, leaf_buf);
wait_on_buffer(leaf_buf);
wret = del_ptr(trans, root, path, 1, slot);
if (wret)
ret = wret;
@ -1382,11 +1409,11 @@ int btrfs_del_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
if (wret)
ret = wret;
} else {
mark_buffer_dirty(leaf_buf);
btrfs_mark_buffer_dirty(leaf_buf);
btrfs_block_release(root, leaf_buf);
}
} else {
mark_buffer_dirty(leaf_buf);
btrfs_mark_buffer_dirty(leaf_buf);
}
}
return ret;

32
fs/btrfs/ctree.h
View File

@ -2,6 +2,7 @@
#define __BTRFS__
#include <linux/fs.h>
#include <linux/buffer_head.h>
#include "bit-radix.h"
struct btrfs_trans_handle;
@ -834,6 +835,37 @@ static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
return sb->s_fs_info;
}
static inline void btrfs_check_bounds(void *vptr, size_t len,
void *vcontainer, size_t container_len)
{
char *ptr = vptr;
char *container = vcontainer;
WARN_ON(ptr < container);
WARN_ON(ptr + len > container + container_len);
}
static inline void btrfs_memcpy(struct btrfs_root *root,
void *dst_block,
void *dst, const void *src, size_t nr)
{
btrfs_check_bounds(dst, nr, dst_block, root->fs_info->sb->s_blocksize);
memcpy(dst, src, nr);
}
static inline void btrfs_memmove(struct btrfs_root *root,
void *dst_block,
void *dst, void *src, size_t nr)
{
btrfs_check_bounds(dst, nr, dst_block, root->fs_info->sb->s_blocksize);
memmove(dst, src, nr);
}
static inline void btrfs_mark_buffer_dirty(struct buffer_head *bh)
{
WARN_ON(!atomic_read(&bh->b_count));
mark_buffer_dirty(bh);
}
/* helper function to cast into the data area of the leaf. */
#define btrfs_item_ptr(leaf, slot, type) \
((type *)(btrfs_leaf_data(leaf) + \

6
fs/btrfs/dir-item.c
View File

@ -34,10 +34,8 @@ int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
btrfs_set_dir_flags(dir_item, 0);
btrfs_set_dir_name_len(dir_item, name_len);
name_ptr = (char *)(dir_item + 1);
memcpy(name_ptr, name, name_len);
if (name_ptr + name_len > path.nodes[0]->b_data + 4096)
WARN_ON(1);
mark_buffer_dirty(path.nodes[0]);
btrfs_memcpy(root, path.nodes[0]->b_data, name_ptr, name, name_len);
btrfs_mark_buffer_dirty(path.nodes[0]);
out:
btrfs_release_path(root, &path);
return ret;

20
fs/btrfs/disk-io.c
View File

@ -8,6 +8,17 @@
#include "disk-io.h"
#include "transaction.h"
#define PATTERN 0xDEADBEEFUL
static inline void check_pattern(struct buffer_head *buf)
{
if (buf->b_private != (void *)PATTERN)
WARN_ON(1);
}
static inline void set_pattern(struct buffer_head *buf)
{
buf->b_private = (void *)PATTERN;
}
static int check_tree_block(struct btrfs_root *root, struct buffer_head *buf)
{
@ -51,8 +62,10 @@ struct buffer_head *btrfs_find_tree_block(struct btrfs_root *root, u64 blocknr)
} while (bh != head);
out_unlock:
unlock_page(page);
if (ret)
if (ret) {
touch_buffer(ret);
check_pattern(ret);
}
page_cache_release(page);
return ret;
}
@ -82,6 +95,7 @@ struct buffer_head *btrfs_find_create_tree_block(struct btrfs_root *root,
bh->b_bdev = root->fs_info->sb->s_bdev;
bh->b_blocknr = first_block;
set_buffer_mapped(bh);
set_pattern(bh);
}
if (bh->b_blocknr == blocknr) {
ret = bh;
@ -225,6 +239,7 @@ struct buffer_head *read_tree_block(struct btrfs_root *root, u64 blocknr)
if (!buffer_uptodate(bh))
goto fail;
csum_tree_block(root, bh, 1);
set_pattern(bh);
} else {
unlock_buffer(bh);
}
@ -240,6 +255,7 @@ fail:
int dirty_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
struct buffer_head *buf)
{
WARN_ON(atomic_read(&buf->b_count) == 0);
mark_buffer_dirty(buf);
return 0;
}
@ -247,6 +263,7 @@ int dirty_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
int clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
struct buffer_head *buf)
{
WARN_ON(atomic_read(&buf->b_count) == 0);
clear_buffer_dirty(buf);
return 0;
}
@ -431,6 +448,7 @@ int close_ctree(struct btrfs_root *root)
void btrfs_block_release(struct btrfs_root *root, struct buffer_head *buf)
{
check_pattern(buf);
brelse(buf);
}

8
fs/btrfs/extent-tree.c
View File

@ -39,7 +39,7 @@ static int inc_block_ref(struct btrfs_trans_handle *trans, struct btrfs_root
item = btrfs_item_ptr(l, path.slots[0], struct btrfs_extent_item);
refs = btrfs_extent_refs(item);
btrfs_set_extent_refs(item, refs + 1);
mark_buffer_dirty(path.nodes[0]);
btrfs_mark_buffer_dirty(path.nodes[0]);
btrfs_release_path(root->fs_info->extent_root, &path);
finish_current_insert(trans, root->fs_info->extent_root);
@ -177,10 +177,10 @@ static int pin_down_block(struct btrfs_root *root, u64 blocknr, int pending)
header = btrfs_buffer_header(bh);
if (btrfs_header_generation(header) ==
root->fs_info->running_transaction->transid) {
brelse(bh);
btrfs_block_release(root, bh);
return 0;
}
brelse(bh);
btrfs_block_release(root, bh);
}
err = set_radix_bit(&root->fs_info->pinned_radix, blocknr);
} else {
@ -224,7 +224,7 @@ static int __free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
BUG_ON(ei->refs == 0);
refs = btrfs_extent_refs(ei) - 1;
btrfs_set_extent_refs(ei, refs);
mark_buffer_dirty(path.nodes[0]);
btrfs_mark_buffer_dirty(path.nodes[0]);
if (refs == 0) {
u64 super_blocks_used;

4
fs/btrfs/file-item.c
View File

@ -34,7 +34,7 @@ int btrfs_alloc_file_extent(struct btrfs_trans_handle *trans,
btrfs_set_file_extent_offset(item, 0);
btrfs_set_file_extent_num_blocks(item, ins.offset);
btrfs_set_file_extent_generation(item, trans->transid);
mark_buffer_dirty(path.nodes[0]);
btrfs_mark_buffer_dirty(path.nodes[0]);
*result = ins.objectid;
btrfs_release_path(root, &path);
return 0;
@ -81,7 +81,7 @@ int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
struct btrfs_csum_item);
ret = 0;
ret = btrfs_csum_data(root, data, len, item->csum);
mark_buffer_dirty(path.nodes[0]);
btrfs_mark_buffer_dirty(path.nodes[0]);
fail:
btrfs_release_path(root, &path);
return ret;

2
fs/btrfs/inode-map.c
View File

@ -109,7 +109,7 @@ int btrfs_insert_inode_map(struct btrfs_trans_handle *trans,
inode_item = btrfs_item_ptr(btrfs_buffer_leaf(path.nodes[0]),
path.slots[0], struct btrfs_inode_map_item);
btrfs_cpu_key_to_disk(&inode_item->key, location);
mark_buffer_dirty(path.nodes[0]);
btrfs_mark_buffer_dirty(path.nodes[0]);
out:
btrfs_release_path(inode_root, &path);
return ret;

7
fs/btrfs/root-tree.c
View File

@ -45,6 +45,7 @@ int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
struct btrfs_leaf *l;
int ret;
int slot;
struct btrfs_root_item *update_item;
btrfs_init_path(&path);
ret = btrfs_search_slot(trans, root, key, &path, 0, 1);
@ -53,9 +54,9 @@ int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
BUG_ON(ret != 0);
l = btrfs_buffer_leaf(path.nodes[0]);
slot = path.slots[0];
memcpy(btrfs_item_ptr(l, slot, struct btrfs_root_item), item,
sizeof(*item));
mark_buffer_dirty(path.nodes[0]);
update_item = btrfs_item_ptr(l, slot, struct btrfs_root_item);
btrfs_memcpy(root, l, update_item, item, sizeof(*item));
btrfs_mark_buffer_dirty(path.nodes[0]);
out:
btrfs_release_path(root, &path);
return ret;

2
fs/btrfs/super.c
View File

@ -557,7 +557,7 @@ static int btrfs_update_inode(struct btrfs_trans_handle *trans,
struct btrfs_inode_item);
fill_inode_item(inode_item, inode);
mark_buffer_dirty(path.nodes[0]);
btrfs_mark_buffer_dirty(path.nodes[0]);
failed:
btrfs_release_path(root, &path);
return 0;

1
fs/btrfs/transaction.c
View File

@ -66,6 +66,7 @@ int btrfs_end_transaction(struct btrfs_trans_handle *trans,
cur_trans->num_writers--;
put_transaction(cur_trans);
mutex_unlock(&root->fs_info->trans_mutex);
memset(trans, 0, sizeof(*trans));
kfree(trans);
return 0;
}