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Merge branch 'btrfs-3.0' into for-linus

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This commit is contained in:
Chris Mason 2011-08-18 10:38:03 -04:00
commit 81d86e1b70
8 changed files with 167 additions and 35 deletions
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10
fs/btrfs/ctree.h
View File

@ -1415,17 +1415,15 @@ void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
static inline u##bits btrfs_##name(struct extent_buffer *eb) \
{ \
type *p = kmap_atomic(eb->first_page, KM_USER0); \
type *p = page_address(eb->first_page); \
u##bits res = le##bits##_to_cpu(p->member); \
kunmap_atomic(p, KM_USER0); \
return res; \
} \
static inline void btrfs_set_##name(struct extent_buffer *eb, \
u##bits val) \
{ \
type *p = kmap_atomic(eb->first_page, KM_USER0); \
type *p = page_address(eb->first_page); \
p->member = cpu_to_le##bits(val); \
kunmap_atomic(p, KM_USER0); \
}
#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
@ -2367,8 +2365,8 @@ static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
int btrfs_drop_snapshot(struct btrfs_root *root,
struct btrfs_block_rsv *block_rsv, int update_ref);
void btrfs_drop_snapshot(struct btrfs_root *root,
struct btrfs_block_rsv *block_rsv, int update_ref);
int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct extent_buffer *node,

75
fs/btrfs/extent-tree.c
View File

@ -1782,6 +1782,9 @@ static int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr,
for (i = 0; i < multi->num_stripes; i++, stripe++) {
if (!stripe->dev->can_discard)
continue;
ret = btrfs_issue_discard(stripe->dev->bdev,
stripe->physical,
stripe->length);
@ -1789,11 +1792,16 @@ static int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr,
discarded_bytes += stripe->length;
else if (ret != -EOPNOTSUPP)
break;
/*
* Just in case we get back EOPNOTSUPP for some reason,
* just ignore the return value so we don't screw up
* people calling discard_extent.
*/
ret = 0;
}
kfree(multi);
}
if (discarded_bytes && ret == -EOPNOTSUPP)
ret = 0;
if (actual_bytes)
*actual_bytes = discarded_bytes;
@ -6269,8 +6277,8 @@ static noinline int walk_up_tree(struct btrfs_trans_handle *trans,
* also make sure backrefs for the shared block and all lower level
* blocks are properly updated.
*/
int btrfs_drop_snapshot(struct btrfs_root *root,
struct btrfs_block_rsv *block_rsv, int update_ref)
void btrfs_drop_snapshot(struct btrfs_root *root,
struct btrfs_block_rsv *block_rsv, int update_ref)
{
struct btrfs_path *path;
struct btrfs_trans_handle *trans;
@ -6283,13 +6291,16 @@ int btrfs_drop_snapshot(struct btrfs_root *root,
int level;
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
if (!path) {
err = -ENOMEM;
goto out;
}
wc = kzalloc(sizeof(*wc), GFP_NOFS);
if (!wc) {
btrfs_free_path(path);
return -ENOMEM;
err = -ENOMEM;
goto out;
}
trans = btrfs_start_transaction(tree_root, 0);
@ -6318,7 +6329,7 @@ int btrfs_drop_snapshot(struct btrfs_root *root,
path->lowest_level = 0;
if (ret < 0) {
err = ret;
goto out;
goto out_free;
}
WARN_ON(ret > 0);
@ -6425,11 +6436,14 @@ int btrfs_drop_snapshot(struct btrfs_root *root,
free_extent_buffer(root->commit_root);
kfree(root);
}
out:
out_free:
btrfs_end_transaction_throttle(trans, tree_root);
kfree(wc);
btrfs_free_path(path);
return err;
out:
if (err)
btrfs_std_error(root->fs_info, err);
return;
}
/*
@ -6720,6 +6734,10 @@ int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr)
struct btrfs_space_info *space_info;
struct btrfs_fs_devices *fs_devices = root->fs_info->fs_devices;
struct btrfs_device *device;
u64 min_free;
int index;
int dev_nr = 0;
int dev_min = 1;
int full = 0;
int ret = 0;
@ -6729,8 +6747,10 @@ int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr)
if (!block_group)
return -1;
min_free = btrfs_block_group_used(&block_group->item);
/* no bytes used, we're good */
if (!btrfs_block_group_used(&block_group->item))
if (!min_free)
goto out;
space_info = block_group->space_info;
@ -6746,10 +6766,9 @@ int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr)
* all of the extents from this block group. If we can, we're good
*/
if ((space_info->total_bytes != block_group->key.offset) &&
(space_info->bytes_used + space_info->bytes_reserved +
space_info->bytes_pinned + space_info->bytes_readonly +
btrfs_block_group_used(&block_group->item) <
space_info->total_bytes)) {
(space_info->bytes_used + space_info->bytes_reserved +
space_info->bytes_pinned + space_info->bytes_readonly +
min_free < space_info->total_bytes)) {
spin_unlock(&space_info->lock);
goto out;
}
@ -6766,9 +6785,29 @@ int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr)
if (full)
goto out;
/*
* index:
* 0: raid10
* 1: raid1
* 2: dup
* 3: raid0
* 4: single
*/
index = get_block_group_index(block_group);
if (index == 0) {
dev_min = 4;
min_free /= 2;
} else if (index == 1) {
dev_min = 2;
} else if (index == 2) {
min_free *= 2;
} else if (index == 3) {
dev_min = fs_devices->rw_devices;
min_free /= dev_min;
}
mutex_lock(&root->fs_info->chunk_mutex);
list_for_each_entry(device, &fs_devices->alloc_list, dev_alloc_list) {
u64 min_free = btrfs_block_group_used(&block_group->item);
u64 dev_offset;
/*
@ -6779,7 +6818,11 @@ int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr)
ret = find_free_dev_extent(NULL, device, min_free,
&dev_offset, NULL);
if (!ret)
dev_nr++;
if (dev_nr >= dev_min)
break;
ret = -1;
}
}

16
fs/btrfs/file.c
View File

@ -150,6 +150,8 @@ int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
spin_lock(&root->fs_info->defrag_inodes_lock);
if (!BTRFS_I(inode)->in_defrag)
__btrfs_add_inode_defrag(inode, defrag);
else
kfree(defrag);
spin_unlock(&root->fs_info->defrag_inodes_lock);
return 0;
}
@ -1638,11 +1640,15 @@ static long btrfs_fallocate(struct file *file, int mode,
cur_offset = alloc_start;
while (1) {
u64 actual_end;
em = btrfs_get_extent(inode, NULL, 0, cur_offset,
alloc_end - cur_offset, 0);
BUG_ON(IS_ERR_OR_NULL(em));
last_byte = min(extent_map_end(em), alloc_end);
actual_end = min_t(u64, extent_map_end(em), offset + len);
last_byte = (last_byte + mask) & ~mask;
if (em->block_start == EXTENT_MAP_HOLE ||
(cur_offset >= inode->i_size &&
!test_bit(EXTENT_FLAG_PREALLOC, &em->flags))) {
@ -1655,6 +1661,16 @@ static long btrfs_fallocate(struct file *file, int mode,
free_extent_map(em);
break;
}
} else if (actual_end > inode->i_size &&
!(mode & FALLOC_FL_KEEP_SIZE)) {
/*
* We didn't need to allocate any more space, but we
* still extended the size of the file so we need to
* update i_size.
*/
inode->i_ctime = CURRENT_TIME;
i_size_write(inode, actual_end);
btrfs_ordered_update_i_size(inode, actual_end, NULL);
}
free_extent_map(em);

16
fs/btrfs/free-space-cache.c
View File

@ -1168,9 +1168,9 @@ static void recalculate_thresholds(struct btrfs_free_space_ctl *ctl)
div64_u64(extent_bytes, (sizeof(struct btrfs_free_space)));
}
static void bitmap_clear_bits(struct btrfs_free_space_ctl *ctl,
struct btrfs_free_space *info, u64 offset,
u64 bytes)
static inline void __bitmap_clear_bits(struct btrfs_free_space_ctl *ctl,
struct btrfs_free_space *info,
u64 offset, u64 bytes)
{
unsigned long start, count;
@ -1181,6 +1181,13 @@ static void bitmap_clear_bits(struct btrfs_free_space_ctl *ctl,
bitmap_clear(info->bitmap, start, count);
info->bytes -= bytes;
}
static void bitmap_clear_bits(struct btrfs_free_space_ctl *ctl,
struct btrfs_free_space *info, u64 offset,
u64 bytes)
{
__bitmap_clear_bits(ctl, info, offset, bytes);
ctl->free_space -= bytes;
}
@ -1984,7 +1991,7 @@ static u64 btrfs_alloc_from_bitmap(struct btrfs_block_group_cache *block_group,
return 0;
ret = search_start;
bitmap_clear_bits(ctl, entry, ret, bytes);
__bitmap_clear_bits(ctl, entry, ret, bytes);
return ret;
}
@ -2039,7 +2046,6 @@ u64 btrfs_alloc_from_cluster(struct btrfs_block_group_cache *block_group,
continue;
}
} else {
ret = entry->offset;
entry->offset += bytes;

4
fs/btrfs/ioctl.c
View File

@ -2236,6 +2236,10 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
btrfs_wait_ordered_range(src, off, len);
}
/* truncate page cache pages from target inode range */
truncate_inode_pages_range(&inode->i_data, off,
ALIGN(off + len, PAGE_CACHE_SIZE) - 1);
/* clone data */
key.objectid = btrfs_ino(src);
key.type = BTRFS_EXTENT_DATA_KEY;

28
fs/btrfs/tree-log.c
View File

@ -799,14 +799,15 @@ static noinline int add_inode_ref(struct btrfs_trans_handle *trans,
struct extent_buffer *eb, int slot,
struct btrfs_key *key)
{
struct inode *dir;
int ret;
struct btrfs_inode_ref *ref;
struct btrfs_dir_item *di;
struct inode *dir;
struct inode *inode;
char *name;
int namelen;
unsigned long ref_ptr;
unsigned long ref_end;
char *name;
int namelen;
int ret;
int search_done = 0;
/*
@ -909,6 +910,25 @@ again:
}
btrfs_release_path(path);
/* look for a conflicting sequence number */
di = btrfs_lookup_dir_index_item(trans, root, path, btrfs_ino(dir),
btrfs_inode_ref_index(eb, ref),
name, namelen, 0);
if (di && !IS_ERR(di)) {
ret = drop_one_dir_item(trans, root, path, dir, di);
BUG_ON(ret);
}
btrfs_release_path(path);
/* look for a conflicing name */
di = btrfs_lookup_dir_item(trans, root, path, btrfs_ino(dir),
name, namelen, 0);
if (di && !IS_ERR(di)) {
ret = drop_one_dir_item(trans, root, path, dir, di);
BUG_ON(ret);
}
btrfs_release_path(path);
insert:
/* insert our name */
ret = btrfs_add_link(trans, dir, inode, name, namelen, 0,

51
fs/btrfs/volumes.c
View File

@ -142,6 +142,7 @@ static noinline int run_scheduled_bios(struct btrfs_device *device)
unsigned long limit;
unsigned long last_waited = 0;
int force_reg = 0;
int sync_pending = 0;
struct blk_plug plug;
/*
@ -229,6 +230,22 @@ loop_lock:
BUG_ON(atomic_read(&cur->bi_cnt) == 0);
/*
* if we're doing the sync list, record that our
* plug has some sync requests on it
*
* If we're doing the regular list and there are
* sync requests sitting around, unplug before
* we add more
*/
if (pending_bios == &device->pending_sync_bios) {
sync_pending = 1;
} else if (sync_pending) {
blk_finish_plug(&plug);
blk_start_plug(&plug);
sync_pending = 0;
}
submit_bio(cur->bi_rw, cur);
num_run++;
batch_run++;
@ -500,6 +517,9 @@ static int __btrfs_close_devices(struct btrfs_fs_devices *fs_devices)
fs_devices->rw_devices--;
}
if (device->can_discard)
fs_devices->num_can_discard--;
new_device = kmalloc(sizeof(*new_device), GFP_NOFS);
BUG_ON(!new_device);
memcpy(new_device, device, sizeof(*new_device));
@ -508,6 +528,7 @@ static int __btrfs_close_devices(struct btrfs_fs_devices *fs_devices)
new_device->bdev = NULL;
new_device->writeable = 0;
new_device->in_fs_metadata = 0;
new_device->can_discard = 0;
list_replace_rcu(&device->dev_list, &new_device->dev_list);
call_rcu(&device->rcu, free_device);
@ -547,6 +568,7 @@ int btrfs_close_devices(struct btrfs_fs_devices *fs_devices)
static int __btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
fmode_t flags, void *holder)
{
struct request_queue *q;
struct block_device *bdev;
struct list_head *head = &fs_devices->devices;
struct btrfs_device *device;
@ -603,6 +625,12 @@ static int __btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
seeding = 0;
}
q = bdev_get_queue(bdev);
if (blk_queue_discard(q)) {
device->can_discard = 1;
fs_devices->num_can_discard++;
}
device->bdev = bdev;
device->in_fs_metadata = 0;
device->mode = flags;
@ -835,6 +863,7 @@ int find_free_dev_extent(struct btrfs_trans_handle *trans,
max_hole_start = search_start;
max_hole_size = 0;
hole_size = 0;
if (search_start >= search_end) {
ret = -ENOSPC;
@ -917,7 +946,14 @@ next:
cond_resched();
}
hole_size = search_end- search_start;
/*
* At this point, search_start should be the end of
* allocated dev extents, and when shrinking the device,
* search_end may be smaller than search_start.
*/
if (search_end > search_start)
hole_size = search_end - search_start;
if (hole_size > max_hole_size) {
max_hole_start = search_start;
max_hole_size = hole_size;
@ -1543,6 +1579,7 @@ error:
int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
{
struct request_queue *q;
struct btrfs_trans_handle *trans;
struct btrfs_device *device;
struct block_device *bdev;
@ -1612,6 +1649,9 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
lock_chunks(root);
q = bdev_get_queue(bdev);
if (blk_queue_discard(q))
device->can_discard = 1;
device->writeable = 1;
device->work.func = pending_bios_fn;
generate_random_uuid(device->uuid);
@ -1647,6 +1687,8 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
root->fs_info->fs_devices->num_devices++;
root->fs_info->fs_devices->open_devices++;
root->fs_info->fs_devices->rw_devices++;
if (device->can_discard)
root->fs_info->fs_devices->num_can_discard++;
root->fs_info->fs_devices->total_rw_bytes += device->total_bytes;
if (!blk_queue_nonrot(bdev_get_queue(bdev)))
@ -2413,9 +2455,10 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
total_avail = device->total_bytes - device->bytes_used;
else
total_avail = 0;
/* avail is off by max(alloc_start, 1MB), but that is the same
* for all devices, so it doesn't hurt the sorting later on
*/
/* If there is no space on this device, skip it. */
if (total_avail == 0)
continue;
ret = find_free_dev_extent(trans, device,
max_stripe_size * dev_stripes,

2
fs/btrfs/volumes.h
View File

@ -48,6 +48,7 @@ struct btrfs_device {
int writeable;
int in_fs_metadata;
int missing;
int can_discard;
spinlock_t io_lock;
@ -104,6 +105,7 @@ struct btrfs_fs_devices {
u64 rw_devices;
u64 missing_devices;
u64 total_rw_bytes;
u64 num_can_discard;
struct block_device *latest_bdev;
/* all of the devices in the FS, protected by a mutex