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Merge branch 'for-chris' of git://repo.or.cz/linux-btrfs-devel into integration

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Conflicts:
	fs/btrfs/volumes.c

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2012-01-16 15:26:17 -05:00
parent 27263e2832 b367e47fb3
commit d756bd2d93
6 changed files with 282 additions and 228 deletions
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187
fs/btrfs/volumes.c
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@@ -830,7 +830,6 @@ out:
/*
* find_free_dev_extent - find free space in the specified device
* @trans: transaction handler
* @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.
@@ -849,8 +848,7 @@ out:
* 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,
int find_free_dev_extent(struct btrfs_device *device, u64 num_bytes,
u64 *start, u64 *len)
{
struct btrfs_key key;
@@ -894,7 +892,7 @@ int find_free_dev_extent(struct btrfs_trans_handle *trans,
key.offset = search_start;
key.type = BTRFS_DEV_EXTENT_KEY;
ret = btrfs_search_slot(trans, root, &key, path, 0, 0);
ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
if (ret < 0)
goto out;
if (ret > 0) {
@@ -1468,8 +1466,7 @@ error_undo:
/*
* does all the dirty work required for changing file system's UUID.
*/
static int btrfs_prepare_sprout(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
static int btrfs_prepare_sprout(struct btrfs_root *root)
{
struct btrfs_fs_devices *fs_devices = root->fs_info->fs_devices;
struct btrfs_fs_devices *old_devices;
@@ -1693,7 +1690,7 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
if (seeding_dev) {
sb->s_flags &= ~MS_RDONLY;
ret = btrfs_prepare_sprout(trans, root);
ret = btrfs_prepare_sprout(root);
BUG_ON(ret);
}
@@ -3044,8 +3041,7 @@ done:
return ret;
}
static int btrfs_add_system_chunk(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
static int btrfs_add_system_chunk(struct btrfs_root *root,
struct btrfs_key *key,
struct btrfs_chunk *chunk, int item_size)
{
@@ -3221,7 +3217,7 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
if (total_avail == 0)
continue;
ret = find_free_dev_extent(trans, device,
ret = find_free_dev_extent(device,
max_stripe_size * dev_stripes,
&dev_offset, &max_avail);
if (ret && ret != -ENOSPC)
@@ -3412,7 +3408,7 @@ static int __finish_chunk_alloc(struct btrfs_trans_handle *trans,
BUG_ON(ret);
if (map->type & BTRFS_BLOCK_GROUP_SYSTEM) {
ret = btrfs_add_system_chunk(trans, chunk_root, &key, chunk,
ret = btrfs_add_system_chunk(chunk_root, &key, chunk,
item_size);
BUG_ON(ret);
}
@@ -3624,26 +3620,13 @@ static int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
u64 stripe_nr;
u64 stripe_nr_orig;
u64 stripe_nr_end;
int stripes_allocated = 8;
int stripes_required = 1;
int stripe_index;
int i;
int ret = 0;
int num_stripes;
int max_errors = 0;
struct btrfs_bio *bbio = NULL;
if (bbio_ret && !(rw & (REQ_WRITE | REQ_DISCARD)))
stripes_allocated = 1;
again:
if (bbio_ret) {
bbio = kzalloc(btrfs_bio_size(stripes_allocated),
GFP_NOFS);
if (!bbio)
return -ENOMEM;
atomic_set(&bbio->error, 0);
}
read_lock(&em_tree->lock);
em = lookup_extent_mapping(em_tree, logical, *length);
read_unlock(&em_tree->lock);
@@ -3662,28 +3645,6 @@ again:
if (mirror_num > map->num_stripes)
mirror_num = 0;
/* if our btrfs_bio struct is too small, back off and try again */
if (rw & REQ_WRITE) {
if (map->type & (BTRFS_BLOCK_GROUP_RAID1 |
BTRFS_BLOCK_GROUP_DUP)) {
stripes_required = map->num_stripes;
max_errors = 1;
} else if (map->type & BTRFS_BLOCK_GROUP_RAID10) {
stripes_required = map->sub_stripes;
max_errors = 1;
}
}
if (rw & REQ_DISCARD) {
if (map->type & BTRFS_BLOCK_GROUP_PROFILE_MASK)
stripes_required = map->num_stripes;
}
if (bbio_ret && (rw & (REQ_WRITE | REQ_DISCARD)) &&
stripes_allocated < stripes_required) {
stripes_allocated = map->num_stripes;
free_extent_map(em);
kfree(bbio);
goto again;
}
stripe_nr = offset;
/*
* stripe_nr counts the total number of stripes we have to stride
@@ -3775,81 +3736,55 @@ again:
}
BUG_ON(stripe_index >= map->num_stripes);
bbio = kzalloc(btrfs_bio_size(num_stripes), GFP_NOFS);
if (!bbio) {
ret = -ENOMEM;
goto out;
}
atomic_set(&bbio->error, 0);
if (rw & REQ_DISCARD) {
int factor = 0;
int sub_stripes = 0;
u64 stripes_per_dev = 0;
u32 remaining_stripes = 0;
if (map->type &
(BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID10)) {
if (map->type & BTRFS_BLOCK_GROUP_RAID0)
sub_stripes = 1;
else
sub_stripes = map->sub_stripes;
factor = map->num_stripes / sub_stripes;
stripes_per_dev = div_u64_rem(stripe_nr_end -
stripe_nr_orig,
factor,
&remaining_stripes);
}
for (i = 0; i < num_stripes; i++) {
bbio->stripes[i].physical =
map->stripes[stripe_index].physical +
stripe_offset + stripe_nr * map->stripe_len;
bbio->stripes[i].dev = map->stripes[stripe_index].dev;
if (map->type & BTRFS_BLOCK_GROUP_RAID0) {
u64 stripes;
u32 last_stripe = 0;
int j;
div_u64_rem(stripe_nr_end - 1,
map->num_stripes,
&last_stripe);
for (j = 0; j < map->num_stripes; j++) {
u32 test;
div_u64_rem(stripe_nr_end - 1 - j,
map->num_stripes, &test);
if (test == stripe_index)
break;
}
stripes = stripe_nr_end - 1 - j;
do_div(stripes, map->num_stripes);
bbio->stripes[i].length = map->stripe_len *
(stripes - stripe_nr + 1);
if (i == 0) {
if (map->type & (BTRFS_BLOCK_GROUP_RAID0 |
BTRFS_BLOCK_GROUP_RAID10)) {
bbio->stripes[i].length = stripes_per_dev *
map->stripe_len;
if (i / sub_stripes < remaining_stripes)
bbio->stripes[i].length +=
map->stripe_len;
if (i < sub_stripes)
bbio->stripes[i].length -=
stripe_offset;
if ((i / sub_stripes + 1) %
sub_stripes == remaining_stripes)
bbio->stripes[i].length -=
stripe_end_offset;
if (i == sub_stripes - 1)
stripe_offset = 0;
}
if (stripe_index == last_stripe)
bbio->stripes[i].length -=
stripe_end_offset;
} else if (map->type & BTRFS_BLOCK_GROUP_RAID10) {
u64 stripes;
int j;
int factor = map->num_stripes /
map->sub_stripes;
u32 last_stripe = 0;
div_u64_rem(stripe_nr_end - 1,
factor, &last_stripe);
last_stripe *= map->sub_stripes;
for (j = 0; j < factor; j++) {
u32 test;
div_u64_rem(stripe_nr_end - 1 - j,
factor, &test);
if (test ==
stripe_index / map->sub_stripes)
break;
}
stripes = stripe_nr_end - 1 - j;
do_div(stripes, factor);
bbio->stripes[i].length = map->stripe_len *
(stripes - stripe_nr + 1);
if (i < map->sub_stripes) {
bbio->stripes[i].length -=
stripe_offset;
if (i == map->sub_stripes - 1)
stripe_offset = 0;
}
if (stripe_index >= last_stripe &&
stripe_index <= (last_stripe +
map->sub_stripes - 1)) {
bbio->stripes[i].length -=
stripe_end_offset;
}
} else
bbio->stripes[i].length = *length;
@@ -3871,15 +3806,22 @@ again:
stripe_index++;
}
}
if (bbio_ret) {
*bbio_ret = bbio;
bbio->num_stripes = num_stripes;
bbio->max_errors = max_errors;
bbio->mirror_num = mirror_num;
if (rw & REQ_WRITE) {
if (map->type & (BTRFS_BLOCK_GROUP_RAID1 |
BTRFS_BLOCK_GROUP_RAID10 |
BTRFS_BLOCK_GROUP_DUP)) {
max_errors = 1;
}
}
*bbio_ret = bbio;
bbio->num_stripes = num_stripes;
bbio->max_errors = max_errors;
bbio->mirror_num = mirror_num;
out:
free_extent_map(em);
return 0;
return ret;
}
int btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
@@ -4284,7 +4226,7 @@ static int open_seed_devices(struct btrfs_root *root, u8 *fsid)
struct btrfs_fs_devices *fs_devices;
int ret;
mutex_lock(&uuid_mutex);
BUG_ON(!mutex_is_locked(&uuid_mutex));
fs_devices = root->fs_info->fs_devices->seed;
while (fs_devices) {
@@ -4322,7 +4264,6 @@ static int open_seed_devices(struct btrfs_root *root, u8 *fsid)
fs_devices->seed = root->fs_info->fs_devices->seed;
root->fs_info->fs_devices->seed = fs_devices;
out:
mutex_unlock(&uuid_mutex);
return ret;
}
@@ -4465,6 +4406,9 @@ int btrfs_read_chunk_tree(struct btrfs_root *root)
if (!path)
return -ENOMEM;
mutex_lock(&uuid_mutex);
lock_chunks(root);
/* first we search for all of the device items, and then we
* read in all of the chunk items. This way we can create chunk
* mappings that reference all of the devices that are afound
@@ -4515,6 +4459,9 @@ again:
}
ret = 0;
error:
unlock_chunks(root);
mutex_unlock(&uuid_mutex);
btrfs_free_path(path);
return ret;
}