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btrfs: use list_for_each_entry* in check-integrity.c 

Use list_for_each_entry*() instead of list_for_each*() to simplify
the code.

Signed-off-by: Geliang Tang <geliangtang@163.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
hifive-unleashed-5.1
Geliang Tang 2015-12-18 22:16:59 +08:00 committed by David Sterba
parent ee22184b53
commit b69f2bef48
1 changed files with 26 additions and 79 deletions
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105
fs/btrfs/check-integrity.c
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@ -531,13 +531,9 @@ static struct btrfsic_block *btrfsic_block_hashtable_lookup(
(((unsigned int)(dev_bytenr >> 16)) ^
((unsigned int)((uintptr_t)bdev))) &
(BTRFSIC_BLOCK_HASHTABLE_SIZE - 1);
struct list_head *elem;
list_for_each(elem, h->table + hashval) {
struct btrfsic_block *const b =
list_entry(elem, struct btrfsic_block,
collision_resolving_node);
struct btrfsic_block *b;
list_for_each_entry(b, h->table + hashval, collision_resolving_node) {
if (b->dev_state->bdev == bdev && b->dev_bytenr == dev_bytenr)
return b;
}
@ -588,13 +584,9 @@ static struct btrfsic_block_link *btrfsic_block_link_hashtable_lookup(
((unsigned int)((uintptr_t)bdev_ref_to)) ^
((unsigned int)((uintptr_t)bdev_ref_from))) &
(BTRFSIC_BLOCK_LINK_HASHTABLE_SIZE - 1);
struct list_head *elem;
list_for_each(elem, h->table + hashval) {
struct btrfsic_block_link *const l =
list_entry(elem, struct btrfsic_block_link,
collision_resolving_node);
struct btrfsic_block_link *l;
list_for_each_entry(l, h->table + hashval, collision_resolving_node) {
BUG_ON(NULL == l->block_ref_to);
BUG_ON(NULL == l->block_ref_from);
if (l->block_ref_to->dev_state->bdev == bdev_ref_to &&
@ -639,13 +631,9 @@ static struct btrfsic_dev_state *btrfsic_dev_state_hashtable_lookup(
const unsigned int hashval =
(((unsigned int)((uintptr_t)bdev)) &
(BTRFSIC_DEV2STATE_HASHTABLE_SIZE - 1));
struct list_head *elem;
list_for_each(elem, h->table + hashval) {
struct btrfsic_dev_state *const ds =
list_entry(elem, struct btrfsic_dev_state,
collision_resolving_node);
struct btrfsic_dev_state *ds;
list_for_each_entry(ds, h->table + hashval, collision_resolving_node) {
if (ds->bdev == bdev)
return ds;
}
@ -1720,29 +1708,20 @@ static int btrfsic_read_block(struct btrfsic_state *state,
static void btrfsic_dump_database(struct btrfsic_state *state)
{
struct list_head *elem_all;
const struct btrfsic_block *b_all;
BUG_ON(NULL == state);
printk(KERN_INFO "all_blocks_list:\n");
list_for_each(elem_all, &state->all_blocks_list) {
const struct btrfsic_block *const b_all =
list_entry(elem_all, struct btrfsic_block,
all_blocks_node);
struct list_head *elem_ref_to;
struct list_head *elem_ref_from;
list_for_each_entry(b_all, &state->all_blocks_list, all_blocks_node) {
const struct btrfsic_block_link *l;
printk(KERN_INFO "%c-block @%llu (%s/%llu/%d)\n",
btrfsic_get_block_type(state, b_all),
b_all->logical_bytenr, b_all->dev_state->name,
b_all->dev_bytenr, b_all->mirror_num);
list_for_each(elem_ref_to, &b_all->ref_to_list) {
const struct btrfsic_block_link *const l =
list_entry(elem_ref_to,
struct btrfsic_block_link,
node_ref_to);
list_for_each_entry(l, &b_all->ref_to_list, node_ref_to) {
printk(KERN_INFO " %c @%llu (%s/%llu/%d)"
" refers %u* to"
" %c @%llu (%s/%llu/%d)\n",
@ -1757,12 +1736,7 @@ static void btrfsic_dump_database(struct btrfsic_state *state)
l->block_ref_to->mirror_num);
}
list_for_each(elem_ref_from, &b_all->ref_from_list) {
const struct btrfsic_block_link *const l =
list_entry(elem_ref_from,
struct btrfsic_block_link,
node_ref_from);
list_for_each_entry(l, &b_all->ref_from_list, node_ref_from) {
printk(KERN_INFO " %c @%llu (%s/%llu/%d)"
" is ref %u* from"
" %c @%llu (%s/%llu/%d)\n",
@ -1845,8 +1819,7 @@ again:
&state->block_hashtable);
if (NULL != block) {
u64 bytenr = 0;
struct list_head *elem_ref_to;
struct list_head *tmp_ref_to;
struct btrfsic_block_link *l, *tmp;
if (block->is_superblock) {
bytenr = btrfs_super_bytenr((struct btrfs_super_block *)
@ -1967,13 +1940,8 @@ again:
* because it still carries valueable information
* like whether it was ever written and IO completed.
*/
list_for_each_safe(elem_ref_to, tmp_ref_to,
&block->ref_to_list) {
struct btrfsic_block_link *const l =
list_entry(elem_ref_to,
struct btrfsic_block_link,
node_ref_to);
list_for_each_entry_safe(l, tmp, &block->ref_to_list,
node_ref_to) {
if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
btrfsic_print_rem_link(state, l);
l->ref_cnt--;
@ -2436,7 +2404,7 @@ static int btrfsic_check_all_ref_blocks(struct btrfsic_state *state,
struct btrfsic_block *const block,
int recursion_level)
{
struct list_head *elem_ref_to;
const struct btrfsic_block_link *l;
int ret = 0;
if (recursion_level >= 3 + BTRFS_MAX_LEVEL) {
@ -2464,11 +2432,7 @@ static int btrfsic_check_all_ref_blocks(struct btrfsic_state *state,
* This algorithm is recursive because the amount of used stack
* space is very small and the max recursion depth is limited.
*/
list_for_each(elem_ref_to, &block->ref_to_list) {
const struct btrfsic_block_link *const l =
list_entry(elem_ref_to, struct btrfsic_block_link,
node_ref_to);
list_for_each_entry(l, &block->ref_to_list, node_ref_to) {
if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
printk(KERN_INFO
"rl=%d, %c @%llu (%s/%llu/%d)"
@ -2561,7 +2525,7 @@ static int btrfsic_is_block_ref_by_superblock(
const struct btrfsic_block *block,
int recursion_level)
{
struct list_head *elem_ref_from;
const struct btrfsic_block_link *l;
if (recursion_level >= 3 + BTRFS_MAX_LEVEL) {
/* refer to comment at "abort cyclic linkage (case 1)" */
@ -2576,11 +2540,7 @@ static int btrfsic_is_block_ref_by_superblock(
* This algorithm is recursive because the amount of used stack space
* is very small and the max recursion depth is limited.
*/
list_for_each(elem_ref_from, &block->ref_from_list) {
const struct btrfsic_block_link *const l =
list_entry(elem_ref_from, struct btrfsic_block_link,
node_ref_from);
list_for_each_entry(l, &block->ref_from_list, node_ref_from) {
if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
printk(KERN_INFO
"rl=%d, %c @%llu (%s/%llu/%d)"
@ -2669,7 +2629,7 @@ static void btrfsic_dump_tree_sub(const struct btrfsic_state *state,
const struct btrfsic_block *block,
int indent_level)
{
struct list_head *elem_ref_to;
const struct btrfsic_block_link *l;
int indent_add;
static char buf[80];
int cursor_position;
@ -2704,11 +2664,7 @@ static void btrfsic_dump_tree_sub(const struct btrfsic_state *state,
}
cursor_position = indent_level;
list_for_each(elem_ref_to, &block->ref_to_list) {
const struct btrfsic_block_link *const l =
list_entry(elem_ref_to, struct btrfsic_block_link,
node_ref_to);
list_for_each_entry(l, &block->ref_to_list, node_ref_to) {
while (cursor_position < indent_level) {
printk(" ");
cursor_position++;
@ -3165,8 +3121,7 @@ int btrfsic_mount(struct btrfs_root *root,
void btrfsic_unmount(struct btrfs_root *root,
struct btrfs_fs_devices *fs_devices)
{
struct list_head *elem_all;
struct list_head *tmp_all;
struct btrfsic_block *b_all, *tmp_all;
struct btrfsic_state *state;
struct list_head *dev_head = &fs_devices->devices;
struct btrfs_device *device;
@ -3206,20 +3161,12 @@ void btrfsic_unmount(struct btrfs_root *root,
* just free all memory that was allocated dynamically.
* Free the blocks and the block_links.
*/
list_for_each_safe(elem_all, tmp_all, &state->all_blocks_list) {
struct btrfsic_block *const b_all =
list_entry(elem_all, struct btrfsic_block,
all_blocks_node);
struct list_head *elem_ref_to;
struct list_head *tmp_ref_to;
list_for_each_safe(elem_ref_to, tmp_ref_to,
&b_all->ref_to_list) {
struct btrfsic_block_link *const l =
list_entry(elem_ref_to,
struct btrfsic_block_link,
node_ref_to);
list_for_each_entry_safe(b_all, tmp_all, &state->all_blocks_list,
all_blocks_node) {
struct btrfsic_block_link *l, *tmp;
list_for_each_entry_safe(l, tmp, &b_all->ref_to_list,
node_ref_to) {
if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
btrfsic_print_rem_link(state, l);