return ret;
}
-static int contains_pending_extent(struct btrfs_trans_handle *trans,
+static int contains_pending_extent(struct btrfs_transaction *transaction,
struct btrfs_device *device,
u64 *start, u64 len)
{
+ struct btrfs_fs_info *fs_info = device->dev_root->fs_info;
struct extent_map *em;
- struct list_head *search_list = &trans->transaction->pending_chunks;
+ struct list_head *search_list = &fs_info->pinned_chunks;
int ret = 0;
u64 physical_start = *start;
+ if (transaction)
+ search_list = &transaction->pending_chunks;
again:
list_for_each_entry(em, search_list, list) {
struct map_lookup *map;
}
}
}
- if (search_list == &trans->transaction->pending_chunks) {
- search_list = &trans->root->fs_info->pinned_chunks;
+ if (search_list != &fs_info->pinned_chunks) {
+ search_list = &fs_info->pinned_chunks;
goto again;
}
/*
- * find_free_dev_extent - find free space in the specified device
- * @device: the device which we search the free space in
- * @num_bytes: the size of the free space that we need
- * @start: store the start of the free space.
- * @len: the size of the free space. that we find, or the size of the max
- * free space if we don't find suitable free space
+ * find_free_dev_extent_start - find free space in the specified device
+ * @device: the device which we search the free space in
+ * @num_bytes: the size of the free space that we need
+ * @search_start: the position from which to begin the search
+ * @start: store the start of the free space.
+ * @len: the size of the free space. that we find, or the size
+ * of the max free space if we don't find suitable free space
*
* this uses a pretty simple search, the expectation is that it is
* called very infrequently and that a given device has a small number
* But if we don't find suitable free space, it is used to store the size of
* the max free space.
*/
-int find_free_dev_extent(struct btrfs_trans_handle *trans,
- struct btrfs_device *device, u64 num_bytes,
- u64 *start, u64 *len)
+int find_free_dev_extent_start(struct btrfs_transaction *transaction,
+ struct btrfs_device *device, u64 num_bytes,
+ u64 search_start, u64 *start, u64 *len)
{
struct btrfs_key key;
struct btrfs_root *root = device->dev_root;
u64 max_hole_start;
u64 max_hole_size;
u64 extent_end;
- u64 search_start;
u64 search_end = device->total_bytes;
int ret;
int slot;
struct extent_buffer *l;
- /* FIXME use last free of some kind */
-
- /* we don't want to overwrite the superblock on the drive,
- * so we make sure to start at an offset of at least 1MB
- */
- search_start = max(root->fs_info->alloc_start, 1024ull * 1024);
-
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
* Have to check before we set max_hole_start, otherwise
* we could end up sending back this offset anyway.
*/
- if (contains_pending_extent(trans, device,
+ if (contains_pending_extent(transaction, device,
&search_start,
hole_size)) {
if (key.offset >= search_start) {
if (search_end > search_start) {
hole_size = search_end - search_start;
- if (contains_pending_extent(trans, device, &search_start,
+ if (contains_pending_extent(transaction, device, &search_start,
hole_size)) {
btrfs_release_path(path);
goto again;
return ret;
}
+int find_free_dev_extent(struct btrfs_trans_handle *trans,
+ struct btrfs_device *device, u64 num_bytes,
+ u64 *start, u64 *len)
+{
+ struct btrfs_root *root = device->dev_root;
+ u64 search_start;
+
+ /* FIXME use last free of some kind */
+
+ /*
+ * we don't want to overwrite the superblock on the drive,
+ * so we make sure to start at an offset of at least 1MB
+ */
+ search_start = max(root->fs_info->alloc_start, 1024ull * 1024);
+ return find_free_dev_extent_start(trans->transaction, device,
+ num_bytes, search_start, start, len);
+}
+
static int btrfs_free_dev_extent(struct btrfs_trans_handle *trans,
struct btrfs_device *device,
u64 start, u64 *dev_extent_len)
return ret;
}
-static int btrfs_relocate_chunk(struct btrfs_root *root,
- u64 chunk_objectid,
- u64 chunk_offset)
+static int btrfs_relocate_chunk(struct btrfs_root *root, u64 chunk_offset)
{
struct btrfs_root *extent_root;
struct btrfs_trans_handle *trans;
return -ENOSPC;
/* step one, relocate all the extents inside this chunk */
+ btrfs_scrub_pause(root);
ret = btrfs_relocate_block_group(extent_root, chunk_offset);
+ btrfs_scrub_continue(root);
if (ret)
return ret;
if (chunk_type & BTRFS_BLOCK_GROUP_SYSTEM) {
ret = btrfs_relocate_chunk(chunk_root,
- found_key.objectid,
found_key.offset);
if (ret == -ENOSPC)
failed++;
}
ret = btrfs_relocate_chunk(chunk_root,
- found_key.objectid,
found_key.offset);
mutex_unlock(&fs_info->delete_unused_bgs_mutex);
if (ret && ret != -ENOSPC)
struct btrfs_dev_extent *dev_extent = NULL;
struct btrfs_path *path;
u64 length;
- u64 chunk_objectid;
u64 chunk_offset;
int ret;
int slot;
break;
}
- chunk_objectid = btrfs_dev_extent_chunk_objectid(l, dev_extent);
chunk_offset = btrfs_dev_extent_chunk_offset(l, dev_extent);
btrfs_release_path(path);
- ret = btrfs_relocate_chunk(root, chunk_objectid, chunk_offset);
+ ret = btrfs_relocate_chunk(root, chunk_offset);
mutex_unlock(&root->fs_info->delete_unused_bgs_mutex);
if (ret && ret != -ENOSPC)
goto done;
u64 start = new_size;
u64 len = old_size - new_size;
- if (contains_pending_extent(trans, device, &start, len)) {
+ if (contains_pending_extent(trans->transaction, device,
+ &start, len)) {
unlock_chunks(root);
checked_pending_chunks = true;
failed = 0;
* and the stripes
*/
sizeof(u64) * (total_stripes),
- GFP_NOFS);
- if (!bbio)
- return NULL;
+ GFP_NOFS|__GFP_NOFAIL);
atomic_set(&bbio->error, 0);
atomic_set(&bbio->refs, 1);
return 0;
}
-static inline void btrfs_end_bbio(struct btrfs_bio *bbio, struct bio *bio, int err)
+static inline void btrfs_end_bbio(struct btrfs_bio *bbio, struct bio *bio)
{
bio->bi_private = bbio->private;
bio->bi_end_io = bbio->end_io;
- bio_endio(bio, err);
+ bio_endio(bio);
btrfs_put_bbio(bbio);
}
-static void btrfs_end_bio(struct bio *bio, int err)
+static void btrfs_end_bio(struct bio *bio)
{
struct btrfs_bio *bbio = bio->bi_private;
int is_orig_bio = 0;
- if (err) {
+ if (bio->bi_error) {
atomic_inc(&bbio->error);
- if (err == -EIO || err == -EREMOTEIO) {
+ if (bio->bi_error == -EIO || bio->bi_error == -EREMOTEIO) {
unsigned int stripe_index =
btrfs_io_bio(bio)->stripe_index;
struct btrfs_device *dev;
* beyond the tolerance of the btrfs bio
*/
if (atomic_read(&bbio->error) > bbio->max_errors) {
- err = -EIO;
+ bio->bi_error = -EIO;
} else {
/*
* this bio is actually up to date, we didn't
* go over the max number of errors
*/
- set_bit(BIO_UPTODATE, &bio->bi_flags);
- err = 0;
+ bio->bi_error = 0;
}
- btrfs_end_bbio(bbio, bio, err);
+ btrfs_end_bbio(bbio, bio);
} else if (!is_orig_bio) {
bio_put(bio);
}
struct btrfs_pending_bios *pending_bios;
if (device->missing || !device->bdev) {
- bio_endio(bio, -EIO);
+ bio_io_error(bio);
return;
}
&device->work);
}
-static int bio_size_ok(struct block_device *bdev, struct bio *bio,
- sector_t sector)
-{
- struct bio_vec *prev;
- struct request_queue *q = bdev_get_queue(bdev);
- unsigned int max_sectors = queue_max_sectors(q);
- struct bvec_merge_data bvm = {
- .bi_bdev = bdev,
- .bi_sector = sector,
- .bi_rw = bio->bi_rw,
- };
-
- if (WARN_ON(bio->bi_vcnt == 0))
- return 1;
-
- prev = &bio->bi_io_vec[bio->bi_vcnt - 1];
- if (bio_sectors(bio) > max_sectors)
- return 0;
-
- if (!q->merge_bvec_fn)
- return 1;
-
- bvm.bi_size = bio->bi_iter.bi_size - prev->bv_len;
- if (q->merge_bvec_fn(q, &bvm, prev) < prev->bv_len)
- return 0;
- return 1;
-}
-
static void submit_stripe_bio(struct btrfs_root *root, struct btrfs_bio *bbio,
struct bio *bio, u64 physical, int dev_nr,
int rw, int async)
btrfsic_submit_bio(rw, bio);
}
-static int breakup_stripe_bio(struct btrfs_root *root, struct btrfs_bio *bbio,
- struct bio *first_bio, struct btrfs_device *dev,
- int dev_nr, int rw, int async)
-{
- struct bio_vec *bvec = first_bio->bi_io_vec;
- struct bio *bio;
- int nr_vecs = bio_get_nr_vecs(dev->bdev);
- u64 physical = bbio->stripes[dev_nr].physical;
-
-again:
- bio = btrfs_bio_alloc(dev->bdev, physical >> 9, nr_vecs, GFP_NOFS);
- if (!bio)
- return -ENOMEM;
-
- while (bvec <= (first_bio->bi_io_vec + first_bio->bi_vcnt - 1)) {
- if (bio_add_page(bio, bvec->bv_page, bvec->bv_len,
- bvec->bv_offset) < bvec->bv_len) {
- u64 len = bio->bi_iter.bi_size;
-
- atomic_inc(&bbio->stripes_pending);
- submit_stripe_bio(root, bbio, bio, physical, dev_nr,
- rw, async);
- physical += len;
- goto again;
- }
- bvec++;
- }
-
- submit_stripe_bio(root, bbio, bio, physical, dev_nr, rw, async);
- return 0;
-}
-
static void bbio_error(struct btrfs_bio *bbio, struct bio *bio, u64 logical)
{
atomic_inc(&bbio->error);
btrfs_io_bio(bio)->mirror_num = bbio->mirror_num;
bio->bi_iter.bi_sector = logical >> 9;
-
- btrfs_end_bbio(bbio, bio, -EIO);
+ bio->bi_error = -EIO;
+ btrfs_end_bbio(bbio, bio);
}
}
continue;
}
- /*
- * Check and see if we're ok with this bio based on it's size
- * and offset with the given device.
- */
- if (!bio_size_ok(dev->bdev, first_bio,
- bbio->stripes[dev_nr].physical >> 9)) {
- ret = breakup_stripe_bio(root, bbio, first_bio, dev,
- dev_nr, rw, async_submit);
- BUG_ON(ret);
- continue;
- }
-
if (dev_nr < total_devs - 1) {
bio = btrfs_bio_clone(first_bio, GFP_NOFS);
BUG_ON(!bio); /* -ENOMEM */
projects / linux-2.6-microblaze.git / blobdiff