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btrfs: add ram_bytes and offset to btrfs_ordered_extent 

Currently, we only create ordered extents when ram_bytes == num_bytes
and offset == 0. However, BTRFS_IOC_ENCODED_WRITE writes may create
extents which only refer to a subset of the full unencoded extent, so we
need to plumb these fields through the ordered extent infrastructure and
pass them down to insert_reserved_file_extent().

Since we're changing the btrfs_add_ordered_extent* signature, let's get
rid of the trivial wrappers and add a kernel-doc.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Omar Sandoval 2019-11-06 12:11:56 -08:00 committed by David Sterba
parent e331f6b19f
commit cb36a9bb17
3 changed files with 83 additions and 117 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
fs/btrfs/inode.c
View File

@ -985,10 +985,13 @@ static int submit_one_async_extent(struct btrfs_inode *inode,
}
free_extent_map(em);
ret = btrfs_add_ordered_extent_compress(inode, start, /* file_offset */
ins.objectid, /* disk_bytenr */
ret = btrfs_add_ordered_extent(inode, start, /* file_offset */
async_extent->ram_size, /* num_bytes */
async_extent->ram_size, /* ram_bytes */
ins.objectid, /* disk_bytenr */
ins.offset, /* disk_num_bytes */
0, /* offset */
1 << BTRFS_ORDERED_COMPRESSED,
async_extent->compress_type);
if (ret) {
btrfs_drop_extent_cache(inode, start, end, 0);
@ -1238,9 +1241,10 @@ static noinline int cow_file_range(struct btrfs_inode *inode,
}
free_extent_map(em);
ret = btrfs_add_ordered_extent(inode, start, ins.objectid,
ram_size, cur_alloc_size,
BTRFS_ORDERED_REGULAR);
ret = btrfs_add_ordered_extent(inode, start, ram_size, ram_size,
ins.objectid, cur_alloc_size, 0,
1 << BTRFS_ORDERED_REGULAR,
BTRFS_COMPRESS_NONE);
if (ret)
goto out_drop_extent_cache;
@ -1899,10 +1903,11 @@ out_check:
goto error;
}
free_extent_map(em);
ret = btrfs_add_ordered_extent(inode, cur_offset,
disk_bytenr, num_bytes,
num_bytes,
BTRFS_ORDERED_PREALLOC);
ret = btrfs_add_ordered_extent(inode,
cur_offset, num_bytes, num_bytes,
disk_bytenr, num_bytes, 0,
1 << BTRFS_ORDERED_PREALLOC,
BTRFS_COMPRESS_NONE);
if (ret) {
btrfs_drop_extent_cache(inode, cur_offset,
cur_offset + num_bytes - 1,
@ -1911,9 +1916,11 @@ out_check:
}
} else {
ret = btrfs_add_ordered_extent(inode, cur_offset,
num_bytes, num_bytes,
disk_bytenr, num_bytes,
num_bytes,
BTRFS_ORDERED_NOCOW);
0,
1 << BTRFS_ORDERED_NOCOW,
BTRFS_COMPRESS_NONE);
if (ret)
goto error;
}
@ -2874,6 +2881,7 @@ static int insert_reserved_file_extent(struct btrfs_trans_handle *trans,
struct btrfs_key ins;
u64 disk_num_bytes = btrfs_stack_file_extent_disk_num_bytes(stack_fi);
u64 disk_bytenr = btrfs_stack_file_extent_disk_bytenr(stack_fi);
u64 offset = btrfs_stack_file_extent_offset(stack_fi);
u64 num_bytes = btrfs_stack_file_extent_num_bytes(stack_fi);
u64 ram_bytes = btrfs_stack_file_extent_ram_bytes(stack_fi);
struct btrfs_drop_extents_args drop_args = { 0 };
@ -2948,7 +2956,8 @@ static int insert_reserved_file_extent(struct btrfs_trans_handle *trans,
goto out;
ret = btrfs_alloc_reserved_file_extent(trans, root, btrfs_ino(inode),
file_pos, qgroup_reserved, &ins);
file_pos - offset,
qgroup_reserved, &ins);
out:
btrfs_free_path(path);
@ -2974,20 +2983,20 @@ static int insert_ordered_extent_file_extent(struct btrfs_trans_handle *trans,
struct btrfs_ordered_extent *oe)
{
struct btrfs_file_extent_item stack_fi;
u64 logical_len;
bool update_inode_bytes;
u64 num_bytes = oe->num_bytes;
u64 ram_bytes = oe->ram_bytes;
memset(&stack_fi, 0, sizeof(stack_fi));
btrfs_set_stack_file_extent_type(&stack_fi, BTRFS_FILE_EXTENT_REG);
btrfs_set_stack_file_extent_disk_bytenr(&stack_fi, oe->disk_bytenr);
btrfs_set_stack_file_extent_disk_num_bytes(&stack_fi,
oe->disk_num_bytes);
btrfs_set_stack_file_extent_offset(&stack_fi, oe->offset);
if (test_bit(BTRFS_ORDERED_TRUNCATED, &oe->flags))
logical_len = oe->truncated_len;
else
logical_len = oe->num_bytes;
btrfs_set_stack_file_extent_num_bytes(&stack_fi, logical_len);
btrfs_set_stack_file_extent_ram_bytes(&stack_fi, logical_len);
num_bytes = ram_bytes = oe->truncated_len;
btrfs_set_stack_file_extent_num_bytes(&stack_fi, num_bytes);
btrfs_set_stack_file_extent_ram_bytes(&stack_fi, ram_bytes);
btrfs_set_stack_file_extent_compression(&stack_fi, oe->compress_type);
/* Encryption and other encoding is reserved and all 0 */
@ -7054,8 +7063,11 @@ static struct extent_map *btrfs_create_dio_extent(struct btrfs_inode *inode,
if (IS_ERR(em))
goto out;
}
ret = btrfs_add_ordered_extent_dio(inode, start, block_start, len,
block_len, type);
ret = btrfs_add_ordered_extent(inode, start, len, len, block_start,
block_len, 0,
(1 << type) |
(1 << BTRFS_ORDERED_DIRECT),
BTRFS_COMPRESS_NONE);
if (ret) {
if (em) {
free_extent_map(em);

118
fs/btrfs/ordered-data.c
View File

@ -143,15 +143,27 @@ static inline struct rb_node *tree_search(struct btrfs_ordered_inode_tree *tree,
return ret;
}
/*
* Allocate and add a new ordered_extent into the per-inode tree.
/**
* Add an ordered extent to the per-inode tree.
*
* The tree is given a single reference on the ordered extent that was
* inserted.
* @inode: Inode that this extent is for.
* @file_offset: Logical offset in file where the extent starts.
* @num_bytes: Logical length of extent in file.
* @ram_bytes: Full length of unencoded data.
* @disk_bytenr: Offset of extent on disk.
* @disk_num_bytes: Size of extent on disk.
* @offset: Offset into unencoded data where file data starts.
* @flags: Flags specifying type of extent (1 << BTRFS_ORDERED_*).
* @compress_type: Compression algorithm used for data.
*
* Most of these parameters correspond to &struct btrfs_file_extent_item. The
* tree is given a single reference on the ordered extent that was inserted.
*
* Return: 0 or -ENOMEM.
*/
static int __btrfs_add_ordered_extent(struct btrfs_inode *inode, u64 file_offset,
u64 disk_bytenr, u64 num_bytes,
u64 disk_num_bytes, int type, int dio,
int btrfs_add_ordered_extent(struct btrfs_inode *inode, u64 file_offset,
u64 num_bytes, u64 ram_bytes, u64 disk_bytenr,
u64 disk_num_bytes, u64 offset, unsigned flags,
int compress_type)
{
struct btrfs_root *root = inode->root;
@ -161,7 +173,8 @@ static int __btrfs_add_ordered_extent(struct btrfs_inode *inode, u64 file_offset
struct btrfs_ordered_extent *entry;
int ret;
if (type == BTRFS_ORDERED_NOCOW || type == BTRFS_ORDERED_PREALLOC) {
if (flags &
((1 << BTRFS_ORDERED_NOCOW) | (1 << BTRFS_ORDERED_PREALLOC))) {
/* For nocow write, we can release the qgroup rsv right now */
ret = btrfs_qgroup_free_data(inode, NULL, file_offset, num_bytes);
if (ret < 0)
@ -181,9 +194,11 @@ static int __btrfs_add_ordered_extent(struct btrfs_inode *inode, u64 file_offset
return -ENOMEM;
entry->file_offset = file_offset;
entry->disk_bytenr = disk_bytenr;
entry->num_bytes = num_bytes;
entry->ram_bytes = ram_bytes;
entry->disk_bytenr = disk_bytenr;
entry->disk_num_bytes = disk_num_bytes;
entry->offset = offset;
entry->bytes_left = num_bytes;
entry->inode = igrab(&inode->vfs_inode);
entry->compress_type = compress_type;
@ -191,18 +206,12 @@ static int __btrfs_add_ordered_extent(struct btrfs_inode *inode, u64 file_offset
entry->qgroup_rsv = ret;
entry->physical = (u64)-1;
ASSERT(type == BTRFS_ORDERED_REGULAR ||
type == BTRFS_ORDERED_NOCOW ||
type == BTRFS_ORDERED_PREALLOC ||
type == BTRFS_ORDERED_COMPRESSED);
set_bit(type, &entry->flags);
ASSERT((flags & ~BTRFS_ORDERED_TYPE_FLAGS) == 0);
entry->flags = flags;
percpu_counter_add_batch(&fs_info->ordered_bytes, num_bytes,
fs_info->delalloc_batch);
if (dio)
set_bit(BTRFS_ORDERED_DIRECT, &entry->flags);
/* one ref for the tree */
refcount_set(&entry->refs, 1);
init_waitqueue_head(&entry->wait);
@ -247,41 +256,6 @@ static int __btrfs_add_ordered_extent(struct btrfs_inode *inode, u64 file_offset
return 0;
}
int btrfs_add_ordered_extent(struct btrfs_inode *inode, u64 file_offset,
u64 disk_bytenr, u64 num_bytes, u64 disk_num_bytes,
int type)
{
ASSERT(type == BTRFS_ORDERED_REGULAR ||
type == BTRFS_ORDERED_NOCOW ||
type == BTRFS_ORDERED_PREALLOC);
return __btrfs_add_ordered_extent(inode, file_offset, disk_bytenr,
num_bytes, disk_num_bytes, type, 0,
BTRFS_COMPRESS_NONE);
}
int btrfs_add_ordered_extent_dio(struct btrfs_inode *inode, u64 file_offset,
u64 disk_bytenr, u64 num_bytes,
u64 disk_num_bytes, int type)
{
ASSERT(type == BTRFS_ORDERED_REGULAR ||
type == BTRFS_ORDERED_NOCOW ||
type == BTRFS_ORDERED_PREALLOC);
return __btrfs_add_ordered_extent(inode, file_offset, disk_bytenr,
num_bytes, disk_num_bytes, type, 1,
BTRFS_COMPRESS_NONE);
}
int btrfs_add_ordered_extent_compress(struct btrfs_inode *inode, u64 file_offset,
u64 disk_bytenr, u64 num_bytes,
u64 disk_num_bytes, int compress_type)
{
ASSERT(compress_type != BTRFS_COMPRESS_NONE);
return __btrfs_add_ordered_extent(inode, file_offset, disk_bytenr,
num_bytes, disk_num_bytes,
BTRFS_ORDERED_COMPRESSED, 0,
compress_type);
}
/*
* Add a struct btrfs_ordered_sum into the list of checksums to be inserted
* when an ordered extent is finished. If the list covers more than one
@ -1052,42 +1026,18 @@ static int clone_ordered_extent(struct btrfs_ordered_extent *ordered, u64 pos,
struct btrfs_fs_info *fs_info = BTRFS_I(inode)->root->fs_info;
u64 file_offset = ordered->file_offset + pos;
u64 disk_bytenr = ordered->disk_bytenr + pos;
u64 num_bytes = len;
u64 disk_num_bytes = len;
int type;
unsigned long flags_masked = ordered->flags & ~(1 << BTRFS_ORDERED_DIRECT);
int compress_type = ordered->compress_type;
unsigned long weight;
int ret;
weight = hweight_long(flags_masked);
WARN_ON_ONCE(weight > 1);
if (!weight)
type = 0;
else
type = __ffs(flags_masked);
unsigned long flags = ordered->flags & BTRFS_ORDERED_TYPE_FLAGS;
/*
* The splitting extent is already counted and will be added again
* in btrfs_add_ordered_extent_*(). Subtract num_bytes to avoid
* double counting.
* The splitting extent is already counted and will be added again in
* btrfs_add_ordered_extent_*(). Subtract len to avoid double counting.
*/
percpu_counter_add_batch(&fs_info->ordered_bytes, -num_bytes,
percpu_counter_add_batch(&fs_info->ordered_bytes, -len,
fs_info->delalloc_batch);
if (test_bit(BTRFS_ORDERED_COMPRESSED, &ordered->flags)) {
WARN_ON_ONCE(1);
ret = btrfs_add_ordered_extent_compress(BTRFS_I(inode),
file_offset, disk_bytenr, num_bytes,
disk_num_bytes, compress_type);
} else if (test_bit(BTRFS_ORDERED_DIRECT, &ordered->flags)) {
ret = btrfs_add_ordered_extent_dio(BTRFS_I(inode), file_offset,
disk_bytenr, num_bytes, disk_num_bytes, type);
} else {
ret = btrfs_add_ordered_extent(BTRFS_I(inode), file_offset,
disk_bytenr, num_bytes, disk_num_bytes, type);
}
return ret;
WARN_ON_ONCE(flags & (1 << BTRFS_ORDERED_COMPRESSED));
return btrfs_add_ordered_extent(BTRFS_I(inode), file_offset, len, len,
disk_bytenr, len, 0, flags,
ordered->compress_type);
}
int btrfs_split_ordered_extent(struct btrfs_ordered_extent *ordered, u64 pre,

22
fs/btrfs/ordered-data.h
View File

@ -76,6 +76,13 @@ enum {
BTRFS_ORDERED_PENDING,
};
/* BTRFS_ORDERED_* flags that specify the type of the extent. */
#define BTRFS_ORDERED_TYPE_FLAGS ((1UL << BTRFS_ORDERED_REGULAR) | \
(1UL << BTRFS_ORDERED_NOCOW) | \
(1UL << BTRFS_ORDERED_PREALLOC) | \
(1UL << BTRFS_ORDERED_COMPRESSED) | \
(1UL << BTRFS_ORDERED_DIRECT))
struct btrfs_ordered_extent {
/* logical offset in the file */
u64 file_offset;
@ -84,9 +91,11 @@ struct btrfs_ordered_extent {
* These fields directly correspond to the same fields in
* btrfs_file_extent_item.
*/
u64 disk_bytenr;
u64 num_bytes;
u64 ram_bytes;
u64 disk_bytenr;
u64 disk_num_bytes;
u64 offset;
/* number of bytes that still need writing */
u64 bytes_left;
@ -179,14 +188,9 @@ bool btrfs_dec_test_ordered_pending(struct btrfs_inode *inode,
struct btrfs_ordered_extent **cached,
u64 file_offset, u64 io_size);
int btrfs_add_ordered_extent(struct btrfs_inode *inode, u64 file_offset,
u64 disk_bytenr, u64 num_bytes, u64 disk_num_bytes,
int type);
int btrfs_add_ordered_extent_dio(struct btrfs_inode *inode, u64 file_offset,
u64 disk_bytenr, u64 num_bytes,
u64 disk_num_bytes, int type);
int btrfs_add_ordered_extent_compress(struct btrfs_inode *inode, u64 file_offset,
u64 disk_bytenr, u64 num_bytes,
u64 disk_num_bytes, int compress_type);
u64 num_bytes, u64 ram_bytes, u64 disk_bytenr,
u64 disk_num_bytes, u64 offset, unsigned flags,
int compress_type);
void btrfs_add_ordered_sum(struct btrfs_ordered_extent *entry,
struct btrfs_ordered_sum *sum);
struct btrfs_ordered_extent *btrfs_lookup_ordered_extent(struct btrfs_inode *inode,