blob: 64043f02882067b5ab94695cb0267dacbd837c65 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2013 Fusion IO. All rights reserved.
*/
#include <linux/types.h>
#include "btrfs-tests.h"
#include "../ctree.h"
#include "../btrfs_inode.h"
#include "../disk-io.h"
#include "../extent_io.h"
#include "../volumes.h"
#include "../compression.h"
static void insert_extent(struct btrfs_root *root, u64 start, u64 len,
u64 ram_bytes, u64 offset, u64 disk_bytenr,
u64 disk_len, u32 type, u8 compression, int slot)
{
struct btrfs_path path;
struct btrfs_file_extent_item *fi;
struct extent_buffer *leaf = root->node;
struct btrfs_key key;
u32 value_len = sizeof(struct btrfs_file_extent_item);
if (type == BTRFS_FILE_EXTENT_INLINE)
value_len += len;
memset(&path, 0, sizeof(path));
path.nodes[0] = leaf;
path.slots[0] = slot;
key.objectid = BTRFS_FIRST_FREE_OBJECTID;
key.type = BTRFS_EXTENT_DATA_KEY;
key.offset = start;
setup_items_for_insert(root, &path, &key, &value_len, value_len,
value_len + sizeof(struct btrfs_item), 1);
fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
btrfs_set_file_extent_generation(leaf, fi, 1);
btrfs_set_file_extent_type(leaf, fi, type);
btrfs_set_file_extent_disk_bytenr(leaf, fi, disk_bytenr);
btrfs_set_file_extent_disk_num_bytes(leaf, fi, disk_len);
btrfs_set_file_extent_offset(leaf, fi, offset);
btrfs_set_file_extent_num_bytes(leaf, fi, len);
btrfs_set_file_extent_ram_bytes(leaf, fi, ram_bytes);
btrfs_set_file_extent_compression(leaf, fi, compression);
btrfs_set_file_extent_encryption(leaf, fi, 0);
btrfs_set_file_extent_other_encoding(leaf, fi, 0);
}
static void insert_inode_item_key(struct btrfs_root *root)
{
struct btrfs_path path;
struct extent_buffer *leaf = root->node;
struct btrfs_key key;
u32 value_len = 0;
memset(&path, 0, sizeof(path));
path.nodes[0] = leaf;
path.slots[0] = 0;
key.objectid = BTRFS_INODE_ITEM_KEY;
key.type = BTRFS_INODE_ITEM_KEY;
key.offset = 0;
setup_items_for_insert(root, &path, &key, &value_len, value_len,
value_len + sizeof(struct btrfs_item), 1);
}
/*
* Build the most complicated map of extents the earth has ever seen. We want
* this so we can test all of the corner cases of btrfs_get_extent. Here is a
* diagram of how the extents will look though this may not be possible we still
* want to make sure everything acts normally (the last number is not inclusive)
*
* [0 - 5][5 - 6][ 6 - 4096 ][ 4096 - 4100][4100 - 8195][8195 - 12291]
* [hole ][inline][hole but no extent][ hole ][ regular ][regular1 split]
*
* [12291 - 16387][16387 - 24579][24579 - 28675][ 28675 - 32771][32771 - 36867 ]
* [ hole ][regular1 split][ prealloc ][ prealloc1 ][prealloc1 written]
*
* [36867 - 45059][45059 - 53251][53251 - 57347][57347 - 61443][61443- 69635]
* [ prealloc1 ][ compressed ][ compressed1 ][ regular ][ compressed1]
*
* [69635-73731][ 73731 - 86019 ][86019-90115]
* [ regular ][ hole but no extent][ regular ]
*/
static void setup_file_extents(struct btrfs_root *root, u32 sectorsize)
{
int slot = 0;
u64 disk_bytenr = SZ_1M;
u64 offset = 0;
/* First we want a hole */
insert_extent(root, offset, 5, 5, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
slot);
slot++;
offset += 5;
/*
* Now we want an inline extent, I don't think this is possible but hey
* why not? Also keep in mind if we have an inline extent it counts as
* the whole first page. If we were to expand it we would have to cow
* and we wouldn't have an inline extent anymore.
*/
insert_extent(root, offset, 1, 1, 0, 0, 0, BTRFS_FILE_EXTENT_INLINE, 0,
slot);
slot++;
offset = sectorsize;
/* Now another hole */
insert_extent(root, offset, 4, 4, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
slot);
slot++;
offset += 4;
/* Now for a regular extent */
insert_extent(root, offset, sectorsize - 1, sectorsize - 1, 0,
disk_bytenr, sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
slot++;
disk_bytenr += sectorsize;
offset += sectorsize - 1;
/*
* Now for 3 extents that were split from a hole punch so we test
* offsets properly.
*/
insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr,
4 * sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
slot++;
offset += sectorsize;
insert_extent(root, offset, sectorsize, sectorsize, 0, 0, 0,
BTRFS_FILE_EXTENT_REG, 0, slot);
slot++;
offset += sectorsize;
insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize,
2 * sectorsize, disk_bytenr, 4 * sectorsize,
BTRFS_FILE_EXTENT_REG, 0, slot);
slot++;
offset += 2 * sectorsize;
disk_bytenr += 4 * sectorsize;
/* Now for a unwritten prealloc extent */
insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr,
sectorsize, BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
slot++;
offset += sectorsize;
/*
* We want to jack up disk_bytenr a little more so the em stuff doesn't
* merge our records.
*/
disk_bytenr += 2 * sectorsize;
/*
* Now for a partially written prealloc extent, basically the same as
* the hole punch example above. Ram_bytes never changes when you mark
* extents written btw.
*/
insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr,
4 * sectorsize, BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
slot++;
offset += sectorsize;
insert_extent(root, offset, sectorsize, 4 * sectorsize, sectorsize,
disk_bytenr, 4 * sectorsize, BTRFS_FILE_EXTENT_REG, 0,
slot);
slot++;
offset += sectorsize;
insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize,
2 * sectorsize, disk_bytenr, 4 * sectorsize,
BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
slot++;
offset += 2 * sectorsize;
disk_bytenr += 4 * sectorsize;
/* Now a normal compressed extent */
insert_extent(root, offset, 2 * sectorsize, 2 * sectorsize, 0,
disk_bytenr, sectorsize, BTRFS_FILE_EXTENT_REG,
BTRFS_COMPRESS_ZLIB, slot);
slot++;
offset += 2 * sectorsize;
/* No merges */
disk_bytenr += 2 * sectorsize;
/* Now a split compressed extent */
insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr,
sectorsize, BTRFS_FILE_EXTENT_REG,
BTRFS_COMPRESS_ZLIB, slot);
slot++;
offset += sectorsize;
insert_extent(root, offset, sectorsize, sectorsize, 0,
disk_bytenr + sectorsize, sectorsize,
BTRFS_FILE_EXTENT_REG, 0, slot);
slot++;
offset += sectorsize;
insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize,
2 * sectorsize, disk_bytenr, sectorsize,
BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
slot++;
offset += 2 * sectorsize;
disk_bytenr += 2 * sectorsize;
/* Now extents that have a hole but no hole extent */
insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr,
sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
slot++;
offset += 4 * sectorsize;
disk_bytenr += sectorsize;
insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr,
sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
}
static unsigned long prealloc_only = 0;
static unsigned long compressed_only = 0;
static unsigned long vacancy_only = 0;
static noinline int test_btrfs_get_extent(u32 sectorsize, u32 nodesize)
{
struct btrfs_fs_info *fs_info = NULL;
struct inode *inode = NULL;
struct btrfs_root *root = NULL;
struct extent_map *em = NULL;
u64 orig_start;
u64 disk_bytenr;
u64 offset;
int ret = -ENOMEM;
inode = btrfs_new_test_inode();
if (!inode) {
test_err("couldn't allocate inode");
return ret;
}
BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
BTRFS_I(inode)->location.offset = 0;
fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
if (!fs_info) {
test_err("couldn't allocate dummy fs info");
goto out;
}
root = btrfs_alloc_dummy_root(fs_info);
if (IS_ERR(root)) {
test_err("couldn't allocate root");
goto out;
}
root->node = alloc_dummy_extent_buffer(fs_info, nodesize);
if (!root->node) {
test_err("couldn't allocate dummy buffer");
goto out;
}
/*
* We will just free a dummy node if it's ref count is 2 so we need an
* extra ref so our searches don't accidentally release our page.
*/
extent_buffer_get(root->node);
btrfs_set_header_nritems(root->node, 0);
btrfs_set_header_level(root->node, 0);
ret = -EINVAL;
/* First with no extents */
BTRFS_I(inode)->root = root;
em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, 0, sectorsize, 0);
if (IS_ERR(em)) {
em = NULL;
test_err("got an error when we shouldn't have");
goto out;
}
if (em->block_start != EXTENT_MAP_HOLE) {
test_err("expected a hole, got %llu", em->block_start);
goto out;
}
free_extent_map(em);
btrfs_drop_extent_cache(BTRFS_I(inode), 0, (u64)-1, 0);
/*
* All of the magic numbers are based on the mapping setup in
* setup_file_extents, so if you change anything there you need to
* update the comment and update the expected values below.
*/
setup_file_extents(root, sectorsize);
em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, 0, (u64)-1, 0);
if (IS_ERR(em)) {
test_err("got an error when we shouldn't have");
goto out;
}
if (em->block_start != EXTENT_MAP_HOLE) {
test_err("expected a hole, got %llu", em->block_start);
goto out;
}
if (em->start != 0 || em->len != 5) {
test_err(
"unexpected extent wanted start 0 len 5, got start %llu len %llu",
em->start, em->len);
goto out;
}
if (em->flags != 0) {
test_err("unexpected flags set, want 0 have %lu", em->flags);
goto out;
}
offset = em->start + em->len;
free_extent_map(em);
em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
if (IS_ERR(em)) {
test_err("got an error when we shouldn't have");
goto out;
}
if (em->block_start != EXTENT_MAP_INLINE) {
test_err("expected an inline, got %llu", em->block_start);
goto out;
}
if (em->start != offset || em->len != (sectorsize - 5)) {
test_err(
"unexpected extent wanted start %llu len 1, got start %llu len %llu",
offset, em->start, em->len);
goto out;
}
if (em->flags != 0) {
test_err("unexpected flags set, want 0 have %lu", em->flags);
goto out;
}
/*
* We don't test anything else for inline since it doesn't get set
* unless we have a page for it to write into. Maybe we should change
* this?
*/
offset = em->start + em->len;
free_extent_map(em);
em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
if (IS_ERR(em)) {
test_err("got an error when we shouldn't have");
goto out;
}
if (em->block_start != EXTENT_MAP_HOLE) {
test_err("expected a hole, got %llu", em->block_start);
goto out;
}
if (em->start != offset || em->len != 4) {
test_err(
"unexpected extent wanted start %llu len 4, got start %llu len %llu",
offset, em->start, em->len);
goto out;
}
if (em->flags != 0) {
test_err("unexpected flags set, want 0 have %lu", em->flags);
goto out;
}
offset = em->start + em->len;
free_extent_map(em);
/* Regular extent */
em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
if (IS_ERR(em)) {
test_err("got an error when we shouldn't have");
goto out;
}
if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
test_err("expected a real extent, got %llu", em->block_start);
goto out;
}
if (em->start != offset || em->len != sectorsize - 1) {
test_err(
"unexpected extent wanted start %llu len 4095, got start %llu len %llu",
offset, em->start, em->len);
goto out;
}
if (em->flags != 0) {
test_err("unexpected flags set, want 0 have %lu", em->flags);
goto out;
}
if (em->orig_start != em->start) {
test_err("wrong orig offset, want %llu, have %llu", em->start,
em->orig_start);
goto out;
}
offset = em->start + em->len;
free_extent_map(em);
/* The next 3 are split extents */
em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
if (IS_ERR(em)) {
test_err("got an error when we shouldn't have");
goto out;
}
if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
test_err("expected a real extent, got %llu", em->block_start);
goto out;
}
if (em->start != offset || em->len != sectorsize) {
test_err(
"unexpected extent start %llu len %u, got start %llu len %llu",
offset, sectorsize, em->start, em->len);
goto out;
}
if (em->flags != 0) {
test_err("unexpected flags set, want 0 have %lu", em->flags);
goto out;
}
if (em->orig_start != em->start) {
test_err("wrong orig offset, want %llu, have %llu", em->start,
em->orig_start);
goto out;
}
disk_bytenr = em->block_start;
orig_start = em->start;
offset = em->start + em->len;
free_extent_map(em);
em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
if (IS_ERR(em)) {
test_err("got an error when we shouldn't have");
goto out;
}
if (em->block_start != EXTENT_MAP_HOLE) {
test_err("expected a hole, got %llu", em->block_start);
goto out;
}
if (em->start != offset || em->len != sectorsize) {
test_err(
"unexpected extent wanted start %llu len %u, got start %llu len %llu",
offset, sectorsize, em->start, em->len);
goto out;
}
if (em->flags != 0) {
test_err("unexpected flags set, want 0 have %lu", em->flags);
goto out;
}
offset = em->start + em->len;
free_extent_map(em);
em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
if (IS_ERR(em)) {
test_err("got an error when we shouldn't have");
goto out;
}
if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
test_err("expected a real extent, got %llu", em->block_start);
goto out;
}
if (em->start != offset || em->len != 2 * sectorsize) {
test_err(
"unexpected extent wanted start %llu len %u, got start %llu len %llu",
offset, 2 * sectorsize, em->start, em->len);
goto out;
}
if (em->flags != 0) {
test_err("unexpected flags set, want 0 have %lu", em->flags);
goto out;
}
if (em->orig_start != orig_start) {
test_err("wrong orig offset, want %llu, have %llu",
orig_start, em->orig_start);
goto out;
}
disk_bytenr += (em->start - orig_start);
if (em->block_start != disk_bytenr) {
test_err("wrong block start, want %llu, have %llu",
disk_bytenr, em->block_start);
goto out;
}
offset = em->start + em->len;
free_extent_map(em);
/* Prealloc extent */
em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
if (IS_ERR(em)) {
test_err("got an error when we shouldn't have");
goto out;
}
if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
test_err("expected a real extent, got %llu", em->block_start);
goto out;
}
if (em->start != offset || em->len != sectorsize) {
test_err(
"unexpected extent wanted start %llu len %u, got start %llu len %llu",
offset, sectorsize, em->start, em->len);
goto out;
}
if (em->flags != prealloc_only) {
test_err("unexpected flags set, want %lu have %lu",
prealloc_only, em->flags);
goto out;
}
if (em->orig_start != em->start) {
test_err("wrong orig offset, want %llu, have %llu", em->start,
em->orig_start);
goto out;
}
offset = em->start + em->len;
free_extent_map(em);
/* The next 3 are a half written prealloc extent */
em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
if (IS_ERR(em)) {
test_err("got an error when we shouldn't have");
goto out;
}
if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
test_err("expected a real extent, got %llu", em->block_start);
goto out;
}
if (em->start != offset || em->len != sectorsize) {
test_err(
"unexpected extent wanted start %llu len %u, got start %llu len %llu",
offset, sectorsize, em->start, em->len);
goto out;
}
if (em->flags != prealloc_only) {
test_err("unexpected flags set, want %lu have %lu",
prealloc_only, em->flags);
goto out;
}
if (em->orig_start != em->start) {
test_err("wrong orig offset, want %llu, have %llu", em->start,
em->orig_start);
goto out;
}
disk_bytenr = em->block_start;
orig_start = em->start;
offset = em->start + em->len;
free_extent_map(em);
em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
if (IS_ERR(em)) {
test_err("got an error when we shouldn't have");
goto out;
}
if (em->block_start >= EXTENT_MAP_HOLE) {
test_err("expected a real extent, got %llu", em->block_start);
goto out;
}
if (em->start != offset || em->len != sectorsize) {
test_err(
"unexpected extent wanted start %llu len %u, got start %llu len %llu",
offset, sectorsize, em->start, em->len);
goto out;
}
if (em->flags != 0) {
test_err("unexpected flags set, want 0 have %lu", em->flags);
goto out;
}
if (em->orig_start != orig_start) {
test_err("unexpected orig offset, wanted %llu, have %llu",
orig_start, em->orig_start);
goto out;
}
if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
test_err("unexpected block start, wanted %llu, have %llu",
disk_bytenr + (em->start - em->orig_start),
em->block_start);
goto out;
}
offset = em->start + em->len;
free_extent_map(em);
em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
if (IS_ERR(em)) {
test_err("got an error when we shouldn't have");
goto out;
}
if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
test_err("expected a real extent, got %llu", em->block_start);
goto out;
}
if (em->start != offset || em->len != 2 * sectorsize) {
test_err(
"unexpected extent wanted start %llu len %u, got start %llu len %llu",
offset, 2 * sectorsize, em->start, em->len);
goto out;
}
if (em->flags != prealloc_only) {
test_err("unexpected flags set, want %lu have %lu",
prealloc_only, em->flags);
goto out;
}
if (em->orig_start != orig_start) {
test_err("wrong orig offset, want %llu, have %llu", orig_start,
em->orig_start);
goto out;
}
if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
test_err("unexpected block start, wanted %llu, have %llu",
disk_bytenr + (em->start - em->orig_start),
em->block_start);
goto out;
}
offset = em->start + em->len;
free_extent_map(em);
/* Now for the compressed extent */
em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
if (IS_ERR(em)) {
test_err("got an error when we shouldn't have");
goto out;
}
if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
test_err("expected a real extent, got %llu", em->block_start);
goto out;
}
if (em->start != offset || em->len != 2 * sectorsize) {
test_err(
"unexpected extent wanted start %llu len %u, got start %llu len %llu",
offset, 2 * sectorsize, em->start, em->len);
goto out;
}
if (em->flags != compressed_only) {
test_err("unexpected flags set, want %lu have %lu",
compressed_only, em->flags);
goto out;
}
if (em->orig_start != em->start) {
test_err("wrong orig offset, want %llu, have %llu",
em->start, em->orig_start);
goto out;
}
if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
test_err("unexpected compress type, wanted %d, got %d",
BTRFS_COMPRESS_ZLIB, em->compress_type);
goto out;
}
offset = em->start + em->len;
free_extent_map(em);
/* Split compressed extent */
em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
if (IS_ERR(em)) {
test_err("got an error when we shouldn't have");
goto out;
}
if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
test_err("expected a real extent, got %llu", em->block_start);
goto out;
}
if (em->start != offset || em->len != sectorsize) {
test_err(
"unexpected extent wanted start %llu len %u, got start %llu len %llu",
offset, sectorsize, em->start, em->len);
goto out;
}
if (em->flags != compressed_only) {
test_err("unexpected flags set, want %lu have %lu",
compressed_only, em->flags);
goto out;
}
if (em->orig_start != em->start) {
test_err("wrong orig offset, want %llu, have %llu",
em->start, em->orig_start);
goto out;
}
if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
test_err("unexpected compress type, wanted %d, got %d",
BTRFS_COMPRESS_ZLIB, em->compress_type);
goto out;
}
disk_bytenr = em->block_start;
orig_start = em->start;
offset = em->start + em->len;
free_extent_map(em);
em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
if (IS_ERR(em)) {
test_err("got an error when we shouldn't have");
goto out;
}
if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
test_err("expected a real extent, got %llu", em->block_start);
goto out;
}
if (em->start != offset || em->len != sectorsize) {
test_err(
"unexpected extent wanted start %llu len %u, got start %llu len %llu",
offset, sectorsize, em->start, em->len);
goto out;
}
if (em->flags != 0) {
test_err("unexpected flags set, want 0 have %lu", em->flags);
goto out;
}
if (em->orig_start != em->start) {
test_err("wrong orig offset, want %llu, have %llu", em->start,
em->orig_start);
goto out;
}
offset = em->start + em->len;
free_extent_map(em);
em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
if (IS_ERR(em)) {
test_err("got an error when we shouldn't have");
goto out;
}
if (em->block_start != disk_bytenr) {
test_err("block start does not match, want %llu got %llu",
disk_bytenr, em->block_start);
goto out;
}
if (em->start != offset || em->len != 2 * sectorsize) {
test_err(
"unexpected extent wanted start %llu len %u, got start %llu len %llu",
offset, 2 * sectorsize, em->start, em->len);
goto out;
}
if (em->flags != compressed_only) {
test_err("unexpected flags set, want %lu have %lu",
compressed_only, em->flags);
goto out;
}
if (em->orig_start != orig_start) {
test_err("wrong orig offset, want %llu, have %llu",
em->start, orig_start);
goto out;
}
if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
test_err("unexpected compress type, wanted %d, got %d",
BTRFS_COMPRESS_ZLIB, em->compress_type);
goto out;
}
offset = em->start + em->len;
free_extent_map(em);
/* A hole between regular extents but no hole extent */
em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset + 6,
sectorsize, 0);
if (IS_ERR(em)) {
test_err("got an error when we shouldn't have");
goto out;
}
if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
test_err("expected a real extent, got %llu", em->block_start);
goto out;
}
if (em->start != offset || em->len != sectorsize) {
test_err(
"unexpected extent wanted start %llu len %u, got start %llu len %llu",
offset, sectorsize, em->start, em->len);
goto out;
}
if (em->flags != 0) {
test_err("unexpected flags set, want 0 have %lu", em->flags);
goto out;
}
if (em->orig_start != em->start) {
test_err("wrong orig offset, want %llu, have %llu", em->start,
em->orig_start);
goto out;
}
offset = em->start + em->len;
free_extent_map(em);
em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, SZ_4M, 0);
if (IS_ERR(em)) {
test_err("got an error when we shouldn't have");
goto out;
}
if (em->block_start != EXTENT_MAP_HOLE) {
test_err("expected a hole extent, got %llu", em->block_start);
goto out;
}
/*
* Currently we just return a length that we requested rather than the
* length of the actual hole, if this changes we'll have to change this
* test.
*/
if (em->start != offset || em->len != 3 * sectorsize) {
test_err(
"unexpected extent wanted start %llu len %u, got start %llu len %llu",
offset, 3 * sectorsize, em->start, em->len);
goto out;
}
if (em->flags != vacancy_only) {
test_err("unexpected flags set, want %lu have %lu",
vacancy_only, em->flags);
goto out;
}
if (em->orig_start != em->start) {
test_err("wrong orig offset, want %llu, have %llu", em->start,
em->orig_start);
goto out;
}
offset = em->start + em->len;
free_extent_map(em);
em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
if (IS_ERR(em)) {
test_err("got an error when we shouldn't have");
goto out;
}
if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
test_err("expected a real extent, got %llu", em->block_start);
goto out;
}
if (em->start != offset || em->len != sectorsize) {
test_err(
"unexpected extent wanted start %llu len %u, got start %llu len %llu",
offset, sectorsize, em->start, em->len);
goto out;
}
if (em->flags != 0) {
test_err("unexpected flags set, want 0 have %lu", em->flags);
goto out;
}
if (em->orig_start != em->start) {
test_err("wrong orig offset, want %llu, have %llu", em->start,
em->orig_start);
goto out;
}
ret = 0;
out:
if (!IS_ERR(em))
free_extent_map(em);
iput(inode);
btrfs_free_dummy_root(root);
btrfs_free_dummy_fs_info(fs_info);
return ret;
}
static int test_hole_first(u32 sectorsize, u32 nodesize)
{
struct btrfs_fs_info *fs_info = NULL;
struct inode *inode = NULL;
struct btrfs_root *root = NULL;
struct extent_map *em = NULL;
int ret = -ENOMEM;
inode = btrfs_new_test_inode();
if (!inode) {
test_err("couldn't allocate inode");
return ret;
}
BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
BTRFS_I(inode)->location.offset = 0;
fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
if (!fs_info) {
test_err("couldn't allocate dummy fs info");
goto out;
}
root = btrfs_alloc_dummy_root(fs_info);
if (IS_ERR(root)) {
test_err("couldn't allocate root");
goto out;
}
root->node = alloc_dummy_extent_buffer(fs_info, nodesize);
if (!root->node) {
test_err("couldn't allocate dummy buffer");
goto out;
}
extent_buffer_get(root->node);
btrfs_set_header_nritems(root->node, 0);
btrfs_set_header_level(root->node, 0);
BTRFS_I(inode)->root = root;
ret = -EINVAL;
/*
* Need a blank inode item here just so we don't confuse
* btrfs_get_extent.
*/
insert_inode_item_key(root);
insert_extent(root, sectorsize, sectorsize, sectorsize, 0, sectorsize,
sectorsize, BTRFS_FILE_EXTENT_REG, 0, 1);
em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, 0, 2 * sectorsize, 0);
if (IS_ERR(em)) {
test_err("got an error when we shouldn't have");
goto out;
}
if (em->block_start != EXTENT_MAP_HOLE) {
test_err("expected a hole, got %llu", em->block_start);
goto out;
}
if (em->start != 0 || em->len != sectorsize) {
test_err(
"unexpected extent wanted start 0 len %u, got start %llu len %llu",
sectorsize, em->start, em->len);
goto out;
}
if (em->flags != vacancy_only) {
test_err("wrong flags, wanted %lu, have %lu", vacancy_only,
em->flags);
goto out;
}
free_extent_map(em);
em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, sectorsize,
2 * sectorsize, 0);
if (IS_ERR(em)) {
test_err("got an error when we shouldn't have");
goto out;
}
if (em->block_start != sectorsize) {
test_err("expected a real extent, got %llu", em->block_start);
goto out;
}
if (em->start != sectorsize || em->len != sectorsize) {
test_err(
"unexpected extent wanted start %u len %u, got start %llu len %llu",
sectorsize, sectorsize, em->start, em->len);
goto out;
}
if (em->flags != 0) {
test_err("unexpected flags set, wanted 0 got %lu",
em->flags);
goto out;
}
ret = 0;
out:
if (!IS_ERR(em))
free_extent_map(em);
iput(inode);
btrfs_free_dummy_root(root);
btrfs_free_dummy_fs_info(fs_info);
return ret;
}
static int test_extent_accounting(u32 sectorsize, u32 nodesize)
{
struct btrfs_fs_info *fs_info = NULL;
struct inode *inode = NULL;
struct btrfs_root *root = NULL;
int ret = -ENOMEM;
inode = btrfs_new_test_inode();
if (!inode) {
test_err("couldn't allocate inode");
return ret;
}
fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
if (!fs_info) {
test_err("couldn't allocate dummy fs info");
goto out;
}
root = btrfs_alloc_dummy_root(fs_info);
if (IS_ERR(root)) {
test_err("couldn't allocate root");
goto out;
}
BTRFS_I(inode)->root = root;
btrfs_test_inode_set_ops(inode);
/* [BTRFS_MAX_EXTENT_SIZE] */
ret = btrfs_set_extent_delalloc(inode, 0, BTRFS_MAX_EXTENT_SIZE - 1, 0,
NULL, 0);
if (ret) {
test_err("btrfs_set_extent_delalloc returned %d", ret);
goto out;
}
if (BTRFS_I(inode)->outstanding_extents != 1) {
ret = -EINVAL;
test_err("miscount, wanted 1, got %u",
BTRFS_I(inode)->outstanding_extents);
goto out;
}
/* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */
ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE,
BTRFS_MAX_EXTENT_SIZE + sectorsize - 1,
0, NULL, 0);
if (ret) {
test_err("btrfs_set_extent_delalloc returned %d", ret);
goto out;
}
if (BTRFS_I(inode)->outstanding_extents != 2) {
ret = -EINVAL;
test_err("miscount, wanted 2, got %u",
BTRFS_I(inode)->outstanding_extents);
goto out;
}
/* [BTRFS_MAX_EXTENT_SIZE/2][sectorsize HOLE][the rest] */
ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
BTRFS_MAX_EXTENT_SIZE >> 1,
(BTRFS_MAX_EXTENT_SIZE >> 1) + sectorsize - 1,
EXTENT_DELALLOC | EXTENT_DIRTY |
EXTENT_UPTODATE, 0, 0, NULL);
if (ret) {
test_err("clear_extent_bit returned %d", ret);
goto out;
}
if (BTRFS_I(inode)->outstanding_extents != 2) {
ret = -EINVAL;
test_err("miscount, wanted 2, got %u",
BTRFS_I(inode)->outstanding_extents);
goto out;
}
/* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */
ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE >> 1,
(BTRFS_MAX_EXTENT_SIZE >> 1)
+ sectorsize - 1,
0, NULL, 0);
if (ret) {
test_err("btrfs_set_extent_delalloc returned %d", ret);
goto out;
}
if (BTRFS_I(inode)->outstanding_extents != 2) {
ret = -EINVAL;
test_err("miscount, wanted 2, got %u",
BTRFS_I(inode)->outstanding_extents);
goto out;
}
/*
* [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize HOLE][BTRFS_MAX_EXTENT_SIZE+sectorsize]
*/
ret = btrfs_set_extent_delalloc(inode,
BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize,
(BTRFS_MAX_EXTENT_SIZE << 1) + 3 * sectorsize - 1,
0, NULL, 0);
if (ret) {
test_err("btrfs_set_extent_delalloc returned %d", ret);
goto out;
}
if (BTRFS_I(inode)->outstanding_extents != 4) {
ret = -EINVAL;
test_err("miscount, wanted 4, got %u",
BTRFS_I(inode)->outstanding_extents);
goto out;
}
/*
* [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize][BTRFS_MAX_EXTENT_SIZE+sectorsize]
*/
ret = btrfs_set_extent_delalloc(inode,
BTRFS_MAX_EXTENT_SIZE + sectorsize,
BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, 0, NULL, 0);
if (ret) {
test_err("btrfs_set_extent_delalloc returned %d", ret);
goto out;
}
if (BTRFS_I(inode)->outstanding_extents != 3) {
ret = -EINVAL;
test_err("miscount, wanted 3, got %u",
BTRFS_I(inode)->outstanding_extents);
goto out;
}
/* [BTRFS_MAX_EXTENT_SIZE+4k][4K HOLE][BTRFS_MAX_EXTENT_SIZE+4k] */
ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
BTRFS_MAX_EXTENT_SIZE + sectorsize,
BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1,
EXTENT_DIRTY | EXTENT_DELALLOC |
EXTENT_UPTODATE, 0, 0, NULL);
if (ret) {
test_err("clear_extent_bit returned %d", ret);
goto out;
}
if (BTRFS_I(inode)->outstanding_extents != 4) {
ret = -EINVAL;
test_err("miscount, wanted 4, got %u",
BTRFS_I(inode)->outstanding_extents);
goto out;
}
/*
* Refill the hole again just for good measure, because I thought it
* might fail and I'd rather satisfy my paranoia at this point.
*/
ret = btrfs_set_extent_delalloc(inode,
BTRFS_MAX_EXTENT_SIZE + sectorsize,
BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, 0, NULL, 0);
if (ret) {
test_err("btrfs_set_extent_delalloc returned %d", ret);
goto out;
}
if (BTRFS_I(inode)->outstanding_extents != 3) {
ret = -EINVAL;
test_err("miscount, wanted 3, got %u",
BTRFS_I(inode)->outstanding_extents);
goto out;
}
/* Empty */
ret = clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
EXTENT_DIRTY | EXTENT_DELALLOC |
EXTENT_UPTODATE, 0, 0, NULL);
if (ret) {
test_err("clear_extent_bit returned %d", ret);
goto out;
}
if (BTRFS_I(inode)->outstanding_extents) {
ret = -EINVAL;
test_err("miscount, wanted 0, got %u",
BTRFS_I(inode)->outstanding_extents);
goto out;
}
ret = 0;
out:
if (ret)
clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
EXTENT_DIRTY | EXTENT_DELALLOC |
EXTENT_UPTODATE, 0, 0, NULL);
iput(inode);
btrfs_free_dummy_root(root);
btrfs_free_dummy_fs_info(fs_info);
return ret;
}
int btrfs_test_inodes(u32 sectorsize, u32 nodesize)
{
int ret;
set_bit(EXTENT_FLAG_COMPRESSED, &compressed_only);
set_bit(EXTENT_FLAG_PREALLOC, &prealloc_only);
test_msg("running btrfs_get_extent tests");
ret = test_btrfs_get_extent(sectorsize, nodesize);
if (ret)
return ret;
test_msg("running hole first btrfs_get_extent test");
ret = test_hole_first(sectorsize, nodesize);
if (ret)
return ret;
test_msg("running outstanding_extents tests");
return test_extent_accounting(sectorsize, nodesize);
}