Release 4.11 fs/btrfs/tests/inode-tests.c

Directory: fs/btrfs/tests
/*
 * Copyright (C) 2013 Fusion IO.  All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License v2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 021110-1307, USA.
 */

#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);
}

Contributors
Person Tokens Prop Commits CommitProp
Josef Bacik 256 100.00% 1 100.00%
Total 256 100.00% 1 100.00%



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);
}

Contributors
Person Tokens Prop Commits CommitProp
Josef Bacik 108 100.00% 1 100.00%
Total 108 100.00% 1 100.00%

/*
 * 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);
}

Contributors
Person Tokens Prop Commits CommitProp
Josef Bacik 503 78.59% 1 33.33%
Feifei Xu 136 21.25% 1 33.33%
Byongho Lee 1 0.16% 1 33.33%
Total 640 100.00% 3 100.00%


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_msg("Couldn't allocate inode\n");
		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_msg("Couldn't allocate dummy fs info\n");
		goto out;
	}

	root = btrfs_alloc_dummy_root(fs_info);
	if (IS_ERR(root)) {
		test_msg("Couldn't allocate root\n");
		goto out;
	}

	root->node = alloc_dummy_extent_buffer(fs_info, nodesize);
	if (!root->node) {
		test_msg("Couldn't allocate dummy buffer\n");
		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_msg("Got an error when we shouldn't have\n");
		goto out;
	}
	if (em->block_start != EXTENT_MAP_HOLE) {
		test_msg("Expected a hole, got %llu\n", em->block_start);
		goto out;
	}
	if (!test_bit(EXTENT_FLAG_VACANCY, &em->flags)) {
		test_msg("Vacancy flag wasn't set properly\n");
		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_msg("Got an error when we shouldn't have\n");
		goto out;
	}
	if (em->block_start != EXTENT_MAP_HOLE) {
		test_msg("Expected a hole, got %llu\n", em->block_start);
		goto out;
	}
	if (em->start != 0 || em->len != 5) {
		test_msg("Unexpected extent wanted start 0 len 5, got start "
			 "%llu len %llu\n", em->start, em->len);
		goto out;
	}
	if (em->flags != 0) {
		test_msg("Unexpected flags set, want 0 have %lu\n", 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_msg("Got an error when we shouldn't have\n");
		goto out;
	}
	if (em->block_start != EXTENT_MAP_INLINE) {
		test_msg("Expected an inline, got %llu\n", em->block_start);
		goto out;
	}

	if (em->start != offset || em->len != (sectorsize - 5)) {
		test_msg("Unexpected extent wanted start %llu len 1, got start "
			 "%llu len %llu\n", offset, em->start, em->len);
		goto out;
	}
	if (em->flags != 0) {
		test_msg("Unexpected flags set, want 0 have %lu\n", 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_msg("Got an error when we shouldn't have\n");
		goto out;
	}
	if (em->block_start != EXTENT_MAP_HOLE) {
		test_msg("Expected a hole, got %llu\n", em->block_start);
		goto out;
	}
	if (em->start != offset || em->len != 4) {
		test_msg("Unexpected extent wanted start %llu len 4, got start "
			 "%llu len %llu\n", offset, em->start, em->len);
		goto out;
	}
	if (em->flags != 0) {
		test_msg("Unexpected flags set, want 0 have %lu\n", 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_msg("Got an error when we shouldn't have\n");
		goto out;
	}
	if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
		test_msg("Expected a real extent, got %llu\n", em->block_start);
		goto out;
	}
	if (em->start != offset || em->len != sectorsize - 1) {
		test_msg("Unexpected extent wanted start %llu len 4095, got "
			 "start %llu len %llu\n", offset, em->start, em->len);
		goto out;
	}
	if (em->flags != 0) {
		test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
		goto out;
	}
	if (em->orig_start != em->start) {
		test_msg("Wrong orig offset, want %llu, have %llu\n", 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_msg("Got an error when we shouldn't have\n");
		goto out;
	}
	if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
		test_msg("Expected a real extent, got %llu\n", em->block_start);
		goto out;
	}
	if (em->start != offset || em->len != sectorsize) {
		test_msg("Unexpected extent start %llu len %u, "
			"got start %llu len %llu\n",
			offset, sectorsize, em->start, em->len);
		goto out;
	}
	if (em->flags != 0) {
		test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
		goto out;
	}
	if (em->orig_start != em->start) {
		test_msg("Wrong orig offset, want %llu, have %llu\n", 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_msg("Got an error when we shouldn't have\n");
		goto out;
	}
	if (em->block_start != EXTENT_MAP_HOLE) {
		test_msg("Expected a hole, got %llu\n", em->block_start);
		goto out;
	}
	if (em->start != offset || em->len != sectorsize) {
		test_msg("Unexpected extent wanted start %llu len %u, "
			"got start %llu len %llu\n",
			offset, sectorsize, em->start, em->len);
		goto out;
	}
	if (em->flags != 0) {
		test_msg("Unexpected flags set, want 0 have %lu\n", 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_msg("Got an error when we shouldn't have\n");
		goto out;
	}
	if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
		test_msg("Expected a real extent, got %llu\n", em->block_start);
		goto out;
	}
	if (em->start != offset || em->len != 2 * sectorsize) {
		test_msg("Unexpected extent wanted start %llu len %u, "
			"got start %llu len %llu\n",
			offset, 2 * sectorsize, em->start, em->len);
		goto out;
	}
	if (em->flags != 0) {
		test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
		goto out;
	}
	if (em->orig_start != orig_start) {
		test_msg("Wrong orig offset, want %llu, have %llu\n",
			 orig_start, em->orig_start);
		goto out;
	}
	disk_bytenr += (em->start - orig_start);
	if (em->block_start != disk_bytenr) {
		test_msg("Wrong block start, want %llu, have %llu\n",
			 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_msg("Got an error when we shouldn't have\n");
		goto out;
	}
	if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
		test_msg("Expected a real extent, got %llu\n", em->block_start);
		goto out;
	}
	if (em->start != offset || em->len != sectorsize) {
		test_msg("Unexpected extent wanted start %llu len %u, "
			"got start %llu len %llu\n",
			offset, sectorsize, em->start, em->len);
		goto out;
	}
	if (em->flags != prealloc_only) {
		test_msg("Unexpected flags set, want %lu have %lu\n",
			 prealloc_only, em->flags);
		goto out;
	}
	if (em->orig_start != em->start) {
		test_msg("Wrong orig offset, want %llu, have %llu\n", 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_msg("Got an error when we shouldn't have\n");
		goto out;
	}
	if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
		test_msg("Expected a real extent, got %llu\n", em->block_start);
		goto out;
	}
	if (em->start != offset || em->len != sectorsize) {
		test_msg("Unexpected extent wanted start %llu len %u, "
			"got start %llu len %llu\n",
			offset, sectorsize, em->start, em->len);
		goto out;
	}
	if (em->flags != prealloc_only) {
		test_msg("Unexpected flags set, want %lu have %lu\n",
			 prealloc_only, em->flags);
		goto out;
	}
	if (em->orig_start != em->start) {
		test_msg("Wrong orig offset, want %llu, have %llu\n", 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_msg("Got an error when we shouldn't have\n");
		goto out;
	}
	if (em->block_start >= EXTENT_MAP_HOLE) {
		test_msg("Expected a real extent, got %llu\n", em->block_start);
		goto out;
	}
	if (em->start != offset || em->len != sectorsize) {
		test_msg("Unexpected extent wanted start %llu len %u, "
			"got start %llu len %llu\n",
			offset, sectorsize, em->start, em->len);
		goto out;
	}
	if (em->flags != 0) {
		test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
		goto out;
	}
	if (em->orig_start != orig_start) {
		test_msg("Unexpected orig offset, wanted %llu, have %llu\n",
			 orig_start, em->orig_start);
		goto out;
	}
	if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
		test_msg("Unexpected block start, wanted %llu, have %llu\n",
			 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_msg("Got an error when we shouldn't have\n");
		goto out;
	}
	if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
		test_msg("Expected a real extent, got %llu\n", em->block_start);
		goto out;
	}
	if (em->start != offset || em->len != 2 * sectorsize) {
		test_msg("Unexpected extent wanted start %llu len %u, "
			"got start %llu len %llu\n",
			offset, 2 * sectorsize, em->start, em->len);
		goto out;
	}
	if (em->flags != prealloc_only) {
		test_msg("Unexpected flags set, want %lu have %lu\n",
			 prealloc_only, em->flags);
		goto out;
	}
	if (em->orig_start != orig_start) {
		test_msg("Wrong orig offset, want %llu, have %llu\n", orig_start,
			 em->orig_start);
		goto out;
	}
	if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
		test_msg("Unexpected block start, wanted %llu, have %llu\n",
			 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_msg("Got an error when we shouldn't have\n");
		goto out;
	}
	if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
		test_msg("Expected a real extent, got %llu\n", em->block_start);
		goto out;
	}
	if (em->start != offset || em->len != 2 * sectorsize) {
		test_msg("Unexpected extent wanted start %llu len %u,"
			"got start %llu len %llu\n",
			offset, 2 * sectorsize, em->start, em->len);
		goto out;
	}
	if (em->flags != compressed_only) {
		test_msg("Unexpected flags set, want %lu have %lu\n",
			 compressed_only, em->flags);
		goto out;
	}
	if (em->orig_start != em->start) {
		test_msg("Wrong orig offset, want %llu, have %llu\n",
			 em->start, em->orig_start);
		goto out;
	}
	if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
		test_msg("Unexpected compress type, wanted %d, got %d\n",
			 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_msg("Got an error when we shouldn't have\n");
		goto out;
	}
	if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
		test_msg("Expected a real extent, got %llu\n", em->block_start);
		goto out;
	}
	if (em->start != offset || em->len != sectorsize) {
		test_msg("Unexpected extent wanted start %llu len %u,"
			"got start %llu len %llu\n",
			offset, sectorsize, em->start, em->len);
		goto out;
	}
	if (em->flags != compressed_only) {
		test_msg("Unexpected flags set, want %lu have %lu\n",
			 compressed_only, em->flags);
		goto out;
	}
	if (em->orig_start != em->start) {
		test_msg("Wrong orig offset, want %llu, have %llu\n",
			 em->start, em->orig_start);
		goto out;
	}
	if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
		test_msg("Unexpected compress type, wanted %d, got %d\n",
			 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_msg("Got an error when we shouldn't have\n");
		goto out;
	}
	if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
		test_msg("Expected a real extent, got %llu\n", em->block_start);
		goto out;
	}
	if (em->start != offset || em->len != sectorsize) {
		test_msg("Unexpected extent wanted start %llu len %u, "
			"got start %llu len %llu\n",
			offset, sectorsize, em->start, em->len);
		goto out;
	}
	if (em->flags != 0) {
		test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
		goto out;
	}
	if (em->orig_start != em->start) {
		test_msg("Wrong orig offset, want %llu, have %llu\n", 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_msg("Got an error when we shouldn't have\n");
		goto out;
	}
	if (em->block_start != disk_bytenr) {
		test_msg("Block start does not match, want %llu got %llu\n",
			 disk_bytenr, em->block_start);
		goto out;
	}
	if (em->start != offset || em->len != 2 * sectorsize) {
		test_msg("Unexpected extent wanted start %llu len %u, "
			"got start %llu len %llu\n",
			offset, 2 * sectorsize, em->start, em->len);
		goto out;
	}
	if (em->flags != compressed_only) {
		test_msg("Unexpected flags set, want %lu have %lu\n",
			 compressed_only, em->flags);
		goto out;
	}
	if (em->orig_start != orig_start) {
		test_msg("Wrong orig offset, want %llu, have %llu\n",
			 em->start, orig_start);
		goto out;
	}
	if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
		test_msg("Unexpected compress type, wanted %d, got %d\n",
			 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_msg("Got an error when we shouldn't have\n");
		goto out;
	}
	if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
		test_msg("Expected a real extent, got %llu\n", em->block_start);
		goto out;
	}
	if (em->start != offset || em->len != sectorsize) {
		test_msg("Unexpected extent wanted start %llu len %u, "
			"got start %llu len %llu\n",
			offset, sectorsize, em->start, em->len);
		goto out;
	}
	if (em->flags != 0) {
		test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
		goto out;
	}
	if (em->orig_start != em->start) {
		test_msg("Wrong orig offset, want %llu, have %llu\n", 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, 4096 * 1024, 0);
	if (IS_ERR(em)) {
		test_msg("Got an error when we shouldn't have\n");
		goto out;
	}
	if (em->block_start != EXTENT_MAP_HOLE) {
		test_msg("Expected a hole extent, got %llu\n", 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_msg("Unexpected extent wanted start %llu len %u, "
			"got start %llu len %llu\n",
			offset, 3 * sectorsize, em->start, em->len);
		goto out;
	}
	if (em->flags != vacancy_only) {
		test_msg("Unexpected flags set, want %lu have %lu\n",
			 vacancy_only, em->flags);
		goto out;
	}
	if (em->orig_start != em->start) {
		test_msg("Wrong orig offset, want %llu, have %llu\n", 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_msg("Got an error when we shouldn't have\n");
		goto out;
	}
	if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
		test_msg("Expected a real extent, got %llu\n", em->block_start);
		goto out;
	}
	if (em->start != offset || em->len != sectorsize) {
		test_msg("Unexpected extent wanted start %llu len %u,"
			"got start %llu len %llu\n",
			offset, sectorsize, em->start, em->len);
		goto out;
	}
	if (em->flags != 0) {
		test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
		goto out;
	}
	if (em->orig_start != em->start) {
		test_msg("Wrong orig offset, want %llu, have %llu\n", 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;
}

Contributors
Person Tokens Prop Commits CommitProp
Josef Bacik 3202 93.68% 2 25.00%
Feifei Xu 124 3.63% 1 12.50%
Nikolay Borisov 60 1.76% 2 25.00%
Jeff Mahoney 31 0.91% 2 25.00%
Nicholas D Steeves 1 0.03% 1 12.50%
Total 3418 100.00% 8 100.00%



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_msg("Couldn't allocate inode\n");
		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_msg("Couldn't allocate dummy fs info\n");
		goto out;
	}

	root = btrfs_alloc_dummy_root(fs_info);
	if (IS_ERR(root)) {
		test_msg("Couldn't allocate root\n");
		goto out;
	}

	root->node = alloc_dummy_extent_buffer(fs_info, nodesize);
	if (!root->node) {
		test_msg("Couldn't allocate dummy buffer\n");
		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_msg("Got an error when we shouldn't have\n");
		goto out;
	}
	if (em->block_start != EXTENT_MAP_HOLE) {
		test_msg("Expected a hole, got %llu\n", em->block_start);
		goto out;
	}
	if (em->start != 0 || em->len != sectorsize) {
		test_msg("Unexpected extent wanted start 0 len %u, "
			"got start %llu len %llu\n",
			sectorsize, em->start, em->len);
		goto out;
	}
	if (em->flags != vacancy_only) {
		test_msg("Wrong flags, wanted %lu, have %lu\n", 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_msg("Got an error when we shouldn't have\n");
		goto out;
	}
	if (em->block_start != sectorsize) {
		test_msg("Expected a real extent, got %llu\n", em->block_start);
		goto out;
	}
	if (em->start != sectorsize || em->len != sectorsize) {
		test_msg("Unexpected extent wanted start %u len %u, "
			"got start %llu len %llu\n",
			sectorsize, sectorsize, em->start, em->len);
		goto out;
	}
	if (em->flags != 0) {
		test_msg("Unexpected flags set, wanted 0 got %lu\n",
			 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;
}

Contributors
Person Tokens Prop Commits CommitProp
Josef Bacik 455 86.67% 3 42.86%
Feifei Xu 33 6.29% 1 14.29%
Jeff Mahoney 31 5.90% 2 28.57%
Nikolay Borisov 6 1.14% 1 14.29%
Total 525 100.00% 7 100.00%



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_msg("Couldn't allocate inode\n");
		return ret;
	}

	fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
	if (!fs_info) {
		test_msg("Couldn't allocate dummy fs info\n");
		goto out;
	}

	root = btrfs_alloc_dummy_root(fs_info);
	if (IS_ERR(root)) {
		test_msg("Couldn't allocate root\n");
		goto out;
	}

	BTRFS_I(inode)->root = root;
	btrfs_test_inode_set_ops(inode);

	/* [BTRFS_MAX_EXTENT_SIZE] */
	BTRFS_I(inode)->outstanding_extents++;
	ret = btrfs_set_extent_delalloc(inode, 0, BTRFS_MAX_EXTENT_SIZE - 1,
					NULL, 0);
	if (ret) {
		test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
		goto out;
	}
	if (BTRFS_I(inode)->outstanding_extents != 1) {
		ret = -EINVAL;
		test_msg("Miscount, wanted 1, got %u\n",
			 BTRFS_I(inode)->outstanding_extents);
		goto out;
	}

	/* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */
	BTRFS_I(inode)->outstanding_extents++;
	ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE,
					BTRFS_MAX_EXTENT_SIZE + sectorsize - 1,
					NULL, 0);
	if (ret) {
		test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
		goto out;
	}
	if (BTRFS_I(inode)->outstanding_extents != 2) {
		ret = -EINVAL;
		test_msg("Miscount, wanted 2, got %u\n",
			 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 | EXTENT_DO_ACCOUNTING, 0, 0,
			       NULL, GFP_KERNEL);
	if (ret) {
		test_msg("clear_extent_bit returned %d\n", ret);
		goto out;
	}
	if (BTRFS_I(inode)->outstanding_extents != 2) {
		ret = -EINVAL;
		test_msg("Miscount, wanted 2, got %u\n",
			 BTRFS_I(inode)->outstanding_extents);
		goto out;
	}

	/* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */
	BTRFS_I(inode)->outstanding_extents++;
	ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE >> 1,
					(BTRFS_MAX_EXTENT_SIZE >> 1)
					+ sectorsize - 1,
					NULL, 0);
	if (ret) {
		test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
		goto out;
	}
	if (BTRFS_I(inode)->outstanding_extents != 2) {
		ret = -EINVAL;
		test_msg("Miscount, wanted 2, got %u\n",
			 BTRFS_I(inode)->outstanding_extents);
		goto out;
	}

	/*
         * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize HOLE][BTRFS_MAX_EXTENT_SIZE+sectorsize]
         *
         * I'm artificially adding 2 to outstanding_extents because in the
         * buffered IO case we'd add things up as we go, but I don't feel like
         * doing that here, this isn't the interesting case we want to test.
         */
	BTRFS_I(inode)->outstanding_extents += 2;
	ret = btrfs_set_extent_delalloc(inode,
			BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize,
			(BTRFS_MAX_EXTENT_SIZE << 1) + 3 * sectorsize - 1,
			NULL, 0);
	if (ret) {
		test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
		goto out;
	}
	if (BTRFS_I(inode)->outstanding_extents != 4) {
		ret = -EINVAL;
		test_msg("Miscount, wanted 4, got %u\n",
			 BTRFS_I(inode)->outstanding_extents);
		goto out;
	}

	/*
        * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize][BTRFS_MAX_EXTENT_SIZE+sectorsize]
        */
	BTRFS_I(inode)->outstanding_extents++;
	ret = btrfs_set_extent_delalloc(inode,
			BTRFS_MAX_EXTENT_SIZE + sectorsize,
			BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, NULL, 0);
	if (ret) {
		test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
		goto out;
	}
	if (BTRFS_I(inode)->outstanding_extents != 3) {
		ret = -EINVAL;
		test_msg("Miscount, wanted 3, got %u\n",
			 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_DO_ACCOUNTING | EXTENT_UPTODATE, 0, 0,
			       NULL, GFP_KERNEL);
	if (ret) {
		test_msg("clear_extent_bit returned %d\n", ret);
		goto out;
	}
	if (BTRFS_I(inode)->outstanding_extents != 4) {
		ret = -EINVAL;
		test_msg("Miscount, wanted 4, got %u\n",
			 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.
         */
	BTRFS_I(inode)->outstanding_extents++;
	ret = btrfs_set_extent_delalloc(inode,
			BTRFS_MAX_EXTENT_SIZE + sectorsize,
			BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, NULL, 0);
	if (ret) {
		test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
		goto out;
	}
	if (BTRFS_I(inode)->outstanding_extents != 3) {
		ret = -EINVAL;
		test_msg("Miscount, wanted 3, got %u\n",
			 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_DO_ACCOUNTING | EXTENT_UPTODATE, 0, 0,
			       NULL, GFP_KERNEL);
	if (ret) {
		test_msg("clear_extent_bit returned %d\n", ret);
		goto out;
	}
	if (BTRFS_I(inode)->outstanding_extents) {
		ret = -EINVAL;
		test_msg("Miscount, wanted 0, got %u\n",
			 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_DO_ACCOUNTING | EXTENT_UPTODATE, 0, 0,
				 NULL, GFP_KERNEL);
	iput(inode);
	btrfs_free_dummy_root(root);
	btrfs_free_dummy_fs_info(fs_info);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Josef Bacik 847 90.30% 1 16.67%
Feifei Xu 45 4.80% 1 16.67%
Jeff Mahoney 30 3.20% 2 33.33%
Qu Wenruo 12 1.28% 1 16.67%
David Sterba 4 0.43% 1 16.67%
Total 938 100.00% 6 100.00%



int btrfs_test_inodes(u32 sectorsize, u32 nodesize)
{
	int ret;

	set_bit(EXTENT_FLAG_COMPRESSED, &compressed_only);
	set_bit(EXTENT_FLAG_VACANCY, &vacancy_only);
	set_bit(EXTENT_FLAG_PREALLOC, &prealloc_only);

	test_msg("Running btrfs_get_extent tests\n");
	ret = test_btrfs_get_extent(sectorsize, nodesize);
	if (ret)
		return ret;
	test_msg("Running hole first btrfs_get_extent test\n");
	ret = test_hole_first(sectorsize, nodesize);
	if (ret)
		return ret;
	test_msg("Running outstanding_extents tests\n");
	return test_extent_accounting(sectorsize, nodesize);
}
Contributors
Person Tokens Prop Commits CommitProp
Josef Bacik 73 78.49% 3 75.00%
Feifei Xu 20 21.51% 1 25.00%
Total 93 100.00% 4 100.00%

Overall Contributors
Person Tokens Prop Commits CommitProp
Josef Bacik 5484 91.02% 4 28.57%
Feifei Xu 362 6.01% 1 7.14%
Jeff Mahoney 92 1.53% 2 14.29%
Nikolay Borisov 66 1.10% 2 14.29%
Qu Wenruo 12 0.20% 1 7.14%
David Sterba 4 0.07% 1 7.14%
Anand Jain 3 0.05% 1 7.14%
Nicholas D Steeves 1 0.02% 1 7.14%
Byongho Lee 1 0.02% 1 7.14%
Total 6025 100.00% 14 100.00%
Directory: fs/btrfs/tests

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.
Person	Tokens	Prop	Commits	CommitProp
Josef Bacik	256	100.00%	1	100.00%
Total	256	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.11 fs/btrfs/tests/inode-tests.c

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