Josef Bacik
2013-Aug-14 19:28 UTC
[PATCH] Btrfs: separate out tests into their own directory
The plan is to have a bunch of unit tests that run when btrfs is loaded when you
build with the appropriate config option. My ultimate goal is to have a test
for every non-static function we have, but at first I''m going to focus
on the
things that cause us the most problems. To start out with this just adds a
tests/ directory and moves the existing free space cache tests into that
directory and sets up all of the infrastructure. Thanks,
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
---
fs/btrfs/Makefile | 3 +
fs/btrfs/free-space-cache.c | 488 +++++--------------------------------
fs/btrfs/free-space-cache.h | 8 +-
fs/btrfs/super.c | 13 +-
fs/btrfs/tests/Makefile | 3 +
fs/btrfs/tests/btrfs-tests.h | 13 +
fs/btrfs/tests/free-space-tests.c | 378 ++++++++++++++++++++++++++++
7 files changed, 474 insertions(+), 432 deletions(-)
create mode 100644 fs/btrfs/tests/Makefile
create mode 100644 fs/btrfs/tests/btrfs-tests.h
create mode 100644 fs/btrfs/tests/free-space-tests.c
diff --git a/fs/btrfs/Makefile b/fs/btrfs/Makefile
index 3932224..6908e28 100644
--- a/fs/btrfs/Makefile
+++ b/fs/btrfs/Makefile
@@ -12,3 +12,6 @@ btrfs-y += super.o ctree.o extent-tree.o print-tree.o
root-tree.o dir-item.o \
btrfs-$(CONFIG_BTRFS_FS_POSIX_ACL) += acl.o
btrfs-$(CONFIG_BTRFS_FS_CHECK_INTEGRITY) += check-integrity.o
+
+obj-$(CONFIG_BTRFS_FS_RUN_SANITY_TESTS) := tests/
+btrfs-$(CONFIG_BTRFS_FS_RUN_SANITY_TESTS) += tests/btrfs-tests.o
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 2c262a5..34ecc65 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -2972,33 +2972,68 @@ int btrfs_write_out_ino_cache(struct btrfs_root *root,
}
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
-static struct btrfs_block_group_cache *init_test_block_group(void)
+/*
+ * Use this if you need to make a bitmap or extent entry specifically, it
+ * doesn''t do any of the merging that add_free_space does, this acts a
lot like
+ * how the free space cache loading stuff works, so you can get really weird
+ * configurations.
+ */
+int test_add_free_space_entry(struct btrfs_block_group_cache *cache,
+ u64 offset, u64 bytes, bool bitmap)
{
- struct btrfs_block_group_cache *cache;
+ struct btrfs_free_space_ctl *ctl = cache->free_space_ctl;
+ struct btrfs_free_space *info = NULL, *bitmap_info;
+ void *map = NULL;
+ u64 bytes_added;
+ int ret;
- cache = kzalloc(sizeof(*cache), GFP_NOFS);
- if (!cache)
- return NULL;
- cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
- GFP_NOFS);
- if (!cache->free_space_ctl) {
- kfree(cache);
- return NULL;
+again:
+ if (!info) {
+ info = kmem_cache_zalloc(btrfs_free_space_cachep, GFP_NOFS);
+ if (!info)
+ return -ENOMEM;
}
- cache->key.objectid = 0;
- cache->key.offset = 1024 * 1024 * 1024;
- cache->key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
- cache->sectorsize = 4096;
+ if (!bitmap) {
+ spin_lock(&ctl->tree_lock);
+ info->offset = offset;
+ info->bytes = bytes;
+ ret = link_free_space(ctl, info);
+ spin_unlock(&ctl->tree_lock);
+ if (ret)
+ kmem_cache_free(btrfs_free_space_cachep, info);
+ return ret;
+ }
+
+ if (!map) {
+ map = kzalloc(PAGE_CACHE_SIZE, GFP_NOFS);
+ if (!map) {
+ kmem_cache_free(btrfs_free_space_cachep, info);
+ return -ENOMEM;
+ }
+ }
+
+ spin_lock(&ctl->tree_lock);
+ bitmap_info = tree_search_offset(ctl, offset_to_bitmap(ctl, offset),
+ 1, 0);
+ if (!bitmap_info) {
+ info->bitmap = map;
+ map = NULL;
+ add_new_bitmap(ctl, info, offset);
+ bitmap_info = info;
+ }
- spin_lock_init(&cache->lock);
- INIT_LIST_HEAD(&cache->list);
- INIT_LIST_HEAD(&cache->cluster_list);
- INIT_LIST_HEAD(&cache->new_bg_list);
+ bytes_added = add_bytes_to_bitmap(ctl, bitmap_info, offset, bytes);
+ bytes -= bytes_added;
+ offset += bytes_added;
+ spin_unlock(&ctl->tree_lock);
- btrfs_init_free_space_ctl(cache);
+ if (bytes)
+ goto again;
- return cache;
+ if (map)
+ kfree(map);
+ return 0;
}
/*
@@ -3006,8 +3041,8 @@ static struct btrfs_block_group_cache
*init_test_block_group(void)
* just used to check the absence of space, so if there is free space in the
* range at all we will return 1.
*/
-static int check_exists(struct btrfs_block_group_cache *cache, u64 offset,
- u64 bytes)
+int test_check_exists(struct btrfs_block_group_cache *cache,
+ u64 offset, u64 bytes)
{
struct btrfs_free_space_ctl *ctl = cache->free_space_ctl;
struct btrfs_free_space *info;
@@ -3084,411 +3119,4 @@ out:
spin_unlock(&ctl->tree_lock);
return ret;
}
-
-/*
- * Use this if you need to make a bitmap or extent entry specifically, it
- * doesn''t do any of the merging that add_free_space does, this acts a
lot like
- * how the free space cache loading stuff works, so you can get really weird
- * configurations.
- */
-static int add_free_space_entry(struct btrfs_block_group_cache *cache,
- u64 offset, u64 bytes, bool bitmap)
-{
- struct btrfs_free_space_ctl *ctl = cache->free_space_ctl;
- struct btrfs_free_space *info = NULL, *bitmap_info;
- void *map = NULL;
- u64 bytes_added;
- int ret;
-
-again:
- if (!info) {
- info = kmem_cache_zalloc(btrfs_free_space_cachep, GFP_NOFS);
- if (!info)
- return -ENOMEM;
- }
-
- if (!bitmap) {
- spin_lock(&ctl->tree_lock);
- info->offset = offset;
- info->bytes = bytes;
- ret = link_free_space(ctl, info);
- spin_unlock(&ctl->tree_lock);
- if (ret)
- kmem_cache_free(btrfs_free_space_cachep, info);
- return ret;
- }
-
- if (!map) {
- map = kzalloc(PAGE_CACHE_SIZE, GFP_NOFS);
- if (!map) {
- kmem_cache_free(btrfs_free_space_cachep, info);
- return -ENOMEM;
- }
- }
-
- spin_lock(&ctl->tree_lock);
- bitmap_info = tree_search_offset(ctl, offset_to_bitmap(ctl, offset),
- 1, 0);
- if (!bitmap_info) {
- info->bitmap = map;
- map = NULL;
- add_new_bitmap(ctl, info, offset);
- bitmap_info = info;
- }
-
- bytes_added = add_bytes_to_bitmap(ctl, bitmap_info, offset, bytes);
- bytes -= bytes_added;
- offset += bytes_added;
- spin_unlock(&ctl->tree_lock);
-
- if (bytes)
- goto again;
-
- if (map)
- kfree(map);
- return 0;
-}
-
-#define test_msg(fmt, ...) printk(KERN_INFO "btrfs: selftest: " fmt,
##__VA_ARGS__)
-
-/*
- * This test just does basic sanity checking, making sure we can add an exten
- * entry and remove space from either end and the middle, and make sure we can
- * remove space that covers adjacent extent entries.
- */
-static int test_extents(struct btrfs_block_group_cache *cache)
-{
- int ret = 0;
-
- test_msg("Running extent only tests\n");
-
- /* First just make sure we can remove an entire entry */
- ret = btrfs_add_free_space(cache, 0, 4 * 1024 * 1024);
- if (ret) {
- test_msg("Error adding initial extents %d\n", ret);
- return ret;
- }
-
- ret = btrfs_remove_free_space(cache, 0, 4 * 1024 * 1024);
- if (ret) {
- test_msg("Error removing extent %d\n", ret);
- return ret;
- }
-
- if (check_exists(cache, 0, 4 * 1024 * 1024)) {
- test_msg("Full remove left some lingering space\n");
- return -1;
- }
-
- /* Ok edge and middle cases now */
- ret = btrfs_add_free_space(cache, 0, 4 * 1024 * 1024);
- if (ret) {
- test_msg("Error adding half extent %d\n", ret);
- return ret;
- }
-
- ret = btrfs_remove_free_space(cache, 3 * 1024 * 1024, 1 * 1024 * 1024);
- if (ret) {
- test_msg("Error removing tail end %d\n", ret);
- return ret;
- }
-
- ret = btrfs_remove_free_space(cache, 0, 1 * 1024 * 1024);
- if (ret) {
- test_msg("Error removing front end %d\n", ret);
- return ret;
- }
-
- ret = btrfs_remove_free_space(cache, 2 * 1024 * 1024, 4096);
- if (ret) {
- test_msg("Error removing middle peice %d\n", ret);
- return ret;
- }
-
- if (check_exists(cache, 0, 1 * 1024 * 1024)) {
- test_msg("Still have space at the front\n");
- return -1;
- }
-
- if (check_exists(cache, 2 * 1024 * 1024, 4096)) {
- test_msg("Still have space in the middle\n");
- return -1;
- }
-
- if (check_exists(cache, 3 * 1024 * 1024, 1 * 1024 * 1024)) {
- test_msg("Still have space at the end\n");
- return -1;
- }
-
- /* Cleanup */
- __btrfs_remove_free_space_cache(cache->free_space_ctl);
-
- return 0;
-}
-
-static int test_bitmaps(struct btrfs_block_group_cache *cache)
-{
- u64 next_bitmap_offset;
- int ret;
-
- test_msg("Running bitmap only tests\n");
-
- ret = add_free_space_entry(cache, 0, 4 * 1024 * 1024, 1);
- if (ret) {
- test_msg("Couldn''t create a bitmap entry %d\n", ret);
- return ret;
- }
-
- ret = btrfs_remove_free_space(cache, 0, 4 * 1024 * 1024);
- if (ret) {
- test_msg("Error removing bitmap full range %d\n", ret);
- return ret;
- }
-
- if (check_exists(cache, 0, 4 * 1024 * 1024)) {
- test_msg("Left some space in bitmap\n");
- return -1;
- }
-
- ret = add_free_space_entry(cache, 0, 4 * 1024 * 1024, 1);
- if (ret) {
- test_msg("Couldn''t add to our bitmap entry %d\n", ret);
- return ret;
- }
-
- ret = btrfs_remove_free_space(cache, 1 * 1024 * 1024, 2 * 1024 * 1024);
- if (ret) {
- test_msg("Couldn''t remove middle chunk %d\n", ret);
- return ret;
- }
-
- /*
- * The first bitmap we have starts at offset 0 so the next one is just
- * at the end of the first bitmap.
- */
- next_bitmap_offset = (u64)(BITS_PER_BITMAP * 4096);
-
- /* Test a bit straddling two bitmaps */
- ret = add_free_space_entry(cache, next_bitmap_offset -
- (2 * 1024 * 1024), 4 * 1024 * 1024, 1);
- if (ret) {
- test_msg("Couldn''t add space that straddles two bitmaps
%d\n",
- ret);
- return ret;
- }
-
- ret = btrfs_remove_free_space(cache, next_bitmap_offset -
- (1 * 1024 * 1024), 2 * 1024 * 1024);
- if (ret) {
- test_msg("Couldn''t remove overlapping space %d\n", ret);
- return ret;
- }
-
- if (check_exists(cache, next_bitmap_offset - (1 * 1024 * 1024),
- 2 * 1024 * 1024)) {
- test_msg("Left some space when removing overlapping\n");
- return -1;
- }
-
- __btrfs_remove_free_space_cache(cache->free_space_ctl);
-
- return 0;
-}
-
-/* This is the high grade jackassery */
-static int test_bitmaps_and_extents(struct btrfs_block_group_cache *cache)
-{
- u64 bitmap_offset = (u64)(BITS_PER_BITMAP * 4096);
- int ret;
-
- test_msg("Running bitmap and extent tests\n");
-
- /*
- * First let''s do something simple, an extent at the same offset as
the
- * bitmap, but the free space completely in the extent and then
- * completely in the bitmap.
- */
- ret = add_free_space_entry(cache, 4 * 1024 * 1024, 1 * 1024 * 1024, 1);
- if (ret) {
- test_msg("Couldn''t create bitmap entry %d\n", ret);
- return ret;
- }
-
- ret = add_free_space_entry(cache, 0, 1 * 1024 * 1024, 0);
- if (ret) {
- test_msg("Couldn''t add extent entry %d\n", ret);
- return ret;
- }
-
- ret = btrfs_remove_free_space(cache, 0, 1 * 1024 * 1024);
- if (ret) {
- test_msg("Couldn''t remove extent entry %d\n", ret);
- return ret;
- }
-
- if (check_exists(cache, 0, 1 * 1024 * 1024)) {
- test_msg("Left remnants after our remove\n");
- return -1;
- }
-
- /* Now to add back the extent entry and remove from the bitmap */
- ret = add_free_space_entry(cache, 0, 1 * 1024 * 1024, 0);
- if (ret) {
- test_msg("Couldn''t re-add extent entry %d\n", ret);
- return ret;
- }
-
- ret = btrfs_remove_free_space(cache, 4 * 1024 * 1024, 1 * 1024 * 1024);
- if (ret) {
- test_msg("Couldn''t remove from bitmap %d\n", ret);
- return ret;
- }
-
- if (check_exists(cache, 4 * 1024 * 1024, 1 * 1024 * 1024)) {
- test_msg("Left remnants in the bitmap\n");
- return -1;
- }
-
- /*
- * Ok so a little more evil, extent entry and bitmap at the same offset,
- * removing an overlapping chunk.
- */
- ret = add_free_space_entry(cache, 1 * 1024 * 1024, 4 * 1024 * 1024, 1);
- if (ret) {
- test_msg("Couldn''t add to a bitmap %d\n", ret);
- return ret;
- }
-
- ret = btrfs_remove_free_space(cache, 512 * 1024, 3 * 1024 * 1024);
- if (ret) {
- test_msg("Couldn''t remove overlapping space %d\n", ret);
- return ret;
- }
-
- if (check_exists(cache, 512 * 1024, 3 * 1024 * 1024)) {
- test_msg("Left over peices after removing overlapping\n");
- return -1;
- }
-
- __btrfs_remove_free_space_cache(cache->free_space_ctl);
-
- /* Now with the extent entry offset into the bitmap */
- ret = add_free_space_entry(cache, 4 * 1024 * 1024, 4 * 1024 * 1024, 1);
- if (ret) {
- test_msg("Couldn''t add space to the bitmap %d\n", ret);
- return ret;
- }
-
- ret = add_free_space_entry(cache, 2 * 1024 * 1024, 2 * 1024 * 1024, 0);
- if (ret) {
- test_msg("Couldn''t add extent to the cache %d\n", ret);
- return ret;
- }
-
- ret = btrfs_remove_free_space(cache, 3 * 1024 * 1024, 4 * 1024 * 1024);
- if (ret) {
- test_msg("Problem removing overlapping space %d\n", ret);
- return ret;
- }
-
- if (check_exists(cache, 3 * 1024 * 1024, 4 * 1024 * 1024)) {
- test_msg("Left something behind when removing space");
- return -1;
- }
-
- /*
- * This has blown up in the past, the extent entry starts before the
- * bitmap entry, but we''re trying to remove an offset that falls
- * completely within the bitmap range and is in both the extent entry
- * and the bitmap entry, looks like this
- *
- * [ extent ]
- * [ bitmap ]
- * [ del ]
- */
- __btrfs_remove_free_space_cache(cache->free_space_ctl);
- ret = add_free_space_entry(cache, bitmap_offset + 4 * 1024 * 1024,
- 4 * 1024 * 1024, 1);
- if (ret) {
- test_msg("Couldn''t add bitmap %d\n", ret);
- return ret;
- }
-
- ret = add_free_space_entry(cache, bitmap_offset - 1 * 1024 * 1024,
- 5 * 1024 * 1024, 0);
- if (ret) {
- test_msg("Couldn''t add extent entry %d\n", ret);
- return ret;
- }
-
- ret = btrfs_remove_free_space(cache, bitmap_offset + 1 * 1024 * 1024,
- 5 * 1024 * 1024);
- if (ret) {
- test_msg("Failed to free our space %d\n", ret);
- return ret;
- }
-
- if (check_exists(cache, bitmap_offset + 1 * 1024 * 1024,
- 5 * 1024 * 1024)) {
- test_msg("Left stuff over\n");
- return -1;
- }
-
- __btrfs_remove_free_space_cache(cache->free_space_ctl);
-
- /*
- * This blew up before, we have part of the free space in a bitmap and
- * then the entirety of the rest of the space in an extent. This used
- * to return -EAGAIN back from btrfs_remove_extent, make sure this
- * doesn''t happen.
- */
- ret = add_free_space_entry(cache, 1 * 1024 * 1024, 2 * 1024 * 1024, 1);
- if (ret) {
- test_msg("Couldn''t add bitmap entry %d\n", ret);
- return ret;
- }
-
- ret = add_free_space_entry(cache, 3 * 1024 * 1024, 1 * 1024 * 1024, 0);
- if (ret) {
- test_msg("Couldn''t add extent entry %d\n", ret);
- return ret;
- }
-
- ret = btrfs_remove_free_space(cache, 1 * 1024 * 1024, 3 * 1024 * 1024);
- if (ret) {
- test_msg("Error removing bitmap and extent overlapping %d\n", ret);
- return ret;
- }
-
- __btrfs_remove_free_space_cache(cache->free_space_ctl);
- return 0;
-}
-
-void btrfs_test_free_space_cache(void)
-{
- struct btrfs_block_group_cache *cache;
-
- test_msg("Running btrfs free space cache tests\n");
-
- cache = init_test_block_group();
- if (!cache) {
- test_msg("Couldn''t run the tests\n");
- return;
- }
-
- if (test_extents(cache))
- goto out;
- if (test_bitmaps(cache))
- goto out;
- if (test_bitmaps_and_extents(cache))
- goto out;
-out:
- __btrfs_remove_free_space_cache(cache->free_space_ctl);
- kfree(cache->free_space_ctl);
- kfree(cache);
- test_msg("Free space cache tests finished\n");
-}
-#undef test_msg
-#else /* !CONFIG_BTRFS_FS_RUN_SANITY_TESTS */
-void btrfs_test_free_space_cache(void) {}
-#endif /* !CONFIG_BTRFS_FS_RUN_SANITY_TESTS */
+#endif /* CONFIG_BTRFS_FS_RUN_SANITY_TESTS */
diff --git a/fs/btrfs/free-space-cache.h b/fs/btrfs/free-space-cache.h
index 4acfb19..c749041 100644
--- a/fs/btrfs/free-space-cache.h
+++ b/fs/btrfs/free-space-cache.h
@@ -112,6 +112,12 @@ int btrfs_return_cluster_to_free_space(
int btrfs_trim_block_group(struct btrfs_block_group_cache *block_group,
u64 *trimmed, u64 start, u64 end, u64 minlen);
-void btrfs_test_free_space_cache(void);
+/* Support functions for runnint our sanity tests */
+#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
+int test_add_free_space_entry(struct btrfs_block_group_cache *cache,
+ u64 offset, u64 bytes, bool bitmap);
+int test_check_exists(struct btrfs_block_group_cache *cache,
+ u64 offset, u64 bytes);
+#endif
#endif
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 1967903..8c2d650 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -57,6 +57,10 @@
#include "dev-replace.h"
#include "free-space-cache.h"
+#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
+#include "tests/btrfs-tests.h"
+#endif
+
#define CREATE_TRACE_POINTS
#include <trace/events/btrfs.h>
@@ -1762,6 +1766,11 @@ static void btrfs_print_info(void)
"\n");
}
+static int btrfs_run_sanity_tests(void)
+{
+ return btrfs_test_free_space_cache();
+}
+
static int __init init_btrfs_fs(void)
{
int err;
@@ -1811,8 +1820,10 @@ static int __init init_btrfs_fs(void)
btrfs_init_lockdep();
btrfs_print_info();
- btrfs_test_free_space_cache();
+ err = btrfs_run_sanity_tests();
+ if (err)
+ goto unregister_ioctl;
return 0;
unregister_ioctl:
diff --git a/fs/btrfs/tests/Makefile b/fs/btrfs/tests/Makefile
new file mode 100644
index 0000000..9f4fa23
--- /dev/null
+++ b/fs/btrfs/tests/Makefile
@@ -0,0 +1,3 @@
+obj-$(CONFIG_BTRFS_FS_RUN_SANITY_TESTS) += btrfs-tests.o
+
+btrfs-tests-y += free-space-tests.o
diff --git a/fs/btrfs/tests/btrfs-tests.h b/fs/btrfs/tests/btrfs-tests.h
new file mode 100644
index 0000000..4ae5797
--- /dev/null
+++ b/fs/btrfs/tests/btrfs-tests.h
@@ -0,0 +1,13 @@
+#ifndef __BTRFS_TESTS
+#define __BTRFS_TESTS
+
+#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
+int btrfs_test_free_space_cache(void);
+#else
+static inline int btrfs_test_free_space_cache(void)
+{
+ return 0;
+}
+#endif
+
+#endif
diff --git a/fs/btrfs/tests/free-space-tests.c
b/fs/btrfs/tests/free-space-tests.c
new file mode 100644
index 0000000..733dddf
--- /dev/null
+++ b/fs/btrfs/tests/free-space-tests.c
@@ -0,0 +1,378 @@
+#include <linux/slab.h>
+#include "../ctree.h"
+#include "../free-space-cache.h"
+
+#define BITS_PER_BITMAP (PAGE_CACHE_SIZE * 8)
+static struct btrfs_block_group_cache *init_test_block_group(void)
+{
+ struct btrfs_block_group_cache *cache;
+
+ cache = kzalloc(sizeof(*cache), GFP_NOFS);
+ if (!cache)
+ return NULL;
+ cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
+ GFP_NOFS);
+ if (!cache->free_space_ctl) {
+ kfree(cache);
+ return NULL;
+ }
+
+ cache->key.objectid = 0;
+ cache->key.offset = 1024 * 1024 * 1024;
+ cache->key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
+ cache->sectorsize = 4096;
+
+ spin_lock_init(&cache->lock);
+ INIT_LIST_HEAD(&cache->list);
+ INIT_LIST_HEAD(&cache->cluster_list);
+ INIT_LIST_HEAD(&cache->new_bg_list);
+
+ btrfs_init_free_space_ctl(cache);
+
+ return cache;
+}
+
+#define test_msg(fmt, ...) printk(KERN_INFO "btrfs: selftest: " fmt,
##__VA_ARGS__)
+
+/*
+ * This test just does basic sanity checking, making sure we can add an exten
+ * entry and remove space from either end and the middle, and make sure we can
+ * remove space that covers adjacent extent entries.
+ */
+static int test_extents(struct btrfs_block_group_cache *cache)
+{
+ int ret = 0;
+
+ test_msg("Running extent only tests\n");
+
+ /* First just make sure we can remove an entire entry */
+ ret = btrfs_add_free_space(cache, 0, 4 * 1024 * 1024);
+ if (ret) {
+ test_msg("Error adding initial extents %d\n", ret);
+ return ret;
+ }
+
+ ret = btrfs_remove_free_space(cache, 0, 4 * 1024 * 1024);
+ if (ret) {
+ test_msg("Error removing extent %d\n", ret);
+ return ret;
+ }
+
+ if (test_check_exists(cache, 0, 4 * 1024 * 1024)) {
+ test_msg("Full remove left some lingering space\n");
+ return -1;
+ }
+
+ /* Ok edge and middle cases now */
+ ret = btrfs_add_free_space(cache, 0, 4 * 1024 * 1024);
+ if (ret) {
+ test_msg("Error adding half extent %d\n", ret);
+ return ret;
+ }
+
+ ret = btrfs_remove_free_space(cache, 3 * 1024 * 1024, 1 * 1024 * 1024);
+ if (ret) {
+ test_msg("Error removing tail end %d\n", ret);
+ return ret;
+ }
+
+ ret = btrfs_remove_free_space(cache, 0, 1 * 1024 * 1024);
+ if (ret) {
+ test_msg("Error removing front end %d\n", ret);
+ return ret;
+ }
+
+ ret = btrfs_remove_free_space(cache, 2 * 1024 * 1024, 4096);
+ if (ret) {
+ test_msg("Error removing middle peice %d\n", ret);
+ return ret;
+ }
+
+ if (test_check_exists(cache, 0, 1 * 1024 * 1024)) {
+ test_msg("Still have space at the front\n");
+ return -1;
+ }
+
+ if (test_check_exists(cache, 2 * 1024 * 1024, 4096)) {
+ test_msg("Still have space in the middle\n");
+ return -1;
+ }
+
+ if (test_check_exists(cache, 3 * 1024 * 1024, 1 * 1024 * 1024)) {
+ test_msg("Still have space at the end\n");
+ return -1;
+ }
+
+ /* Cleanup */
+ __btrfs_remove_free_space_cache(cache->free_space_ctl);
+
+ return 0;
+}
+
+static int test_bitmaps(struct btrfs_block_group_cache *cache)
+{
+ u64 next_bitmap_offset;
+ int ret;
+
+ test_msg("Running bitmap only tests\n");
+
+ ret = test_add_free_space_entry(cache, 0, 4 * 1024 * 1024, 1);
+ if (ret) {
+ test_msg("Couldn''t create a bitmap entry %d\n", ret);
+ return ret;
+ }
+
+ ret = btrfs_remove_free_space(cache, 0, 4 * 1024 * 1024);
+ if (ret) {
+ test_msg("Error removing bitmap full range %d\n", ret);
+ return ret;
+ }
+
+ if (test_check_exists(cache, 0, 4 * 1024 * 1024)) {
+ test_msg("Left some space in bitmap\n");
+ return -1;
+ }
+
+ ret = test_add_free_space_entry(cache, 0, 4 * 1024 * 1024, 1);
+ if (ret) {
+ test_msg("Couldn''t add to our bitmap entry %d\n", ret);
+ return ret;
+ }
+
+ ret = btrfs_remove_free_space(cache, 1 * 1024 * 1024, 2 * 1024 * 1024);
+ if (ret) {
+ test_msg("Couldn''t remove middle chunk %d\n", ret);
+ return ret;
+ }
+
+ /*
+ * The first bitmap we have starts at offset 0 so the next one is just
+ * at the end of the first bitmap.
+ */
+ next_bitmap_offset = (u64)(BITS_PER_BITMAP * 4096);
+
+ /* Test a bit straddling two bitmaps */
+ ret = test_add_free_space_entry(cache, next_bitmap_offset -
+ (2 * 1024 * 1024), 4 * 1024 * 1024, 1);
+ if (ret) {
+ test_msg("Couldn''t add space that straddles two bitmaps
%d\n",
+ ret);
+ return ret;
+ }
+
+ ret = btrfs_remove_free_space(cache, next_bitmap_offset -
+ (1 * 1024 * 1024), 2 * 1024 * 1024);
+ if (ret) {
+ test_msg("Couldn''t remove overlapping space %d\n", ret);
+ return ret;
+ }
+
+ if (test_check_exists(cache, next_bitmap_offset - (1 * 1024 * 1024),
+ 2 * 1024 * 1024)) {
+ test_msg("Left some space when removing overlapping\n");
+ return -1;
+ }
+
+ __btrfs_remove_free_space_cache(cache->free_space_ctl);
+
+ return 0;
+}
+
+/* This is the high grade jackassery */
+static int test_bitmaps_and_extents(struct btrfs_block_group_cache *cache)
+{
+ u64 bitmap_offset = (u64)(BITS_PER_BITMAP * 4096);
+ int ret;
+
+ test_msg("Running bitmap and extent tests\n");
+
+ /*
+ * First let''s do something simple, an extent at the same offset as
the
+ * bitmap, but the free space completely in the extent and then
+ * completely in the bitmap.
+ */
+ ret = test_add_free_space_entry(cache, 4 * 1024 * 1024, 1 * 1024 * 1024, 1);
+ if (ret) {
+ test_msg("Couldn''t create bitmap entry %d\n", ret);
+ return ret;
+ }
+
+ ret = test_add_free_space_entry(cache, 0, 1 * 1024 * 1024, 0);
+ if (ret) {
+ test_msg("Couldn''t add extent entry %d\n", ret);
+ return ret;
+ }
+
+ ret = btrfs_remove_free_space(cache, 0, 1 * 1024 * 1024);
+ if (ret) {
+ test_msg("Couldn''t remove extent entry %d\n", ret);
+ return ret;
+ }
+
+ if (test_check_exists(cache, 0, 1 * 1024 * 1024)) {
+ test_msg("Left remnants after our remove\n");
+ return -1;
+ }
+
+ /* Now to add back the extent entry and remove from the bitmap */
+ ret = test_add_free_space_entry(cache, 0, 1 * 1024 * 1024, 0);
+ if (ret) {
+ test_msg("Couldn''t re-add extent entry %d\n", ret);
+ return ret;
+ }
+
+ ret = btrfs_remove_free_space(cache, 4 * 1024 * 1024, 1 * 1024 * 1024);
+ if (ret) {
+ test_msg("Couldn''t remove from bitmap %d\n", ret);
+ return ret;
+ }
+
+ if (test_check_exists(cache, 4 * 1024 * 1024, 1 * 1024 * 1024)) {
+ test_msg("Left remnants in the bitmap\n");
+ return -1;
+ }
+
+ /*
+ * Ok so a little more evil, extent entry and bitmap at the same offset,
+ * removing an overlapping chunk.
+ */
+ ret = test_add_free_space_entry(cache, 1 * 1024 * 1024, 4 * 1024 * 1024, 1);
+ if (ret) {
+ test_msg("Couldn''t add to a bitmap %d\n", ret);
+ return ret;
+ }
+
+ ret = btrfs_remove_free_space(cache, 512 * 1024, 3 * 1024 * 1024);
+ if (ret) {
+ test_msg("Couldn''t remove overlapping space %d\n", ret);
+ return ret;
+ }
+
+ if (test_check_exists(cache, 512 * 1024, 3 * 1024 * 1024)) {
+ test_msg("Left over peices after removing overlapping\n");
+ return -1;
+ }
+
+ __btrfs_remove_free_space_cache(cache->free_space_ctl);
+
+ /* Now with the extent entry offset into the bitmap */
+ ret = test_add_free_space_entry(cache, 4 * 1024 * 1024, 4 * 1024 * 1024, 1);
+ if (ret) {
+ test_msg("Couldn''t add space to the bitmap %d\n", ret);
+ return ret;
+ }
+
+ ret = test_add_free_space_entry(cache, 2 * 1024 * 1024, 2 * 1024 * 1024, 0);
+ if (ret) {
+ test_msg("Couldn''t add extent to the cache %d\n", ret);
+ return ret;
+ }
+
+ ret = btrfs_remove_free_space(cache, 3 * 1024 * 1024, 4 * 1024 * 1024);
+ if (ret) {
+ test_msg("Problem removing overlapping space %d\n", ret);
+ return ret;
+ }
+
+ if (test_check_exists(cache, 3 * 1024 * 1024, 4 * 1024 * 1024)) {
+ test_msg("Left something behind when removing space");
+ return -1;
+ }
+
+ /*
+ * This has blown up in the past, the extent entry starts before the
+ * bitmap entry, but we''re trying to remove an offset that falls
+ * completely within the bitmap range and is in both the extent entry
+ * and the bitmap entry, looks like this
+ *
+ * [ extent ]
+ * [ bitmap ]
+ * [ del ]
+ */
+ __btrfs_remove_free_space_cache(cache->free_space_ctl);
+ ret = test_add_free_space_entry(cache, bitmap_offset + 4 * 1024 * 1024,
+ 4 * 1024 * 1024, 1);
+ if (ret) {
+ test_msg("Couldn''t add bitmap %d\n", ret);
+ return ret;
+ }
+
+ ret = test_add_free_space_entry(cache, bitmap_offset - 1 * 1024 * 1024,
+ 5 * 1024 * 1024, 0);
+ if (ret) {
+ test_msg("Couldn''t add extent entry %d\n", ret);
+ return ret;
+ }
+
+ ret = btrfs_remove_free_space(cache, bitmap_offset + 1 * 1024 * 1024,
+ 5 * 1024 * 1024);
+ if (ret) {
+ test_msg("Failed to free our space %d\n", ret);
+ return ret;
+ }
+
+ if (test_check_exists(cache, bitmap_offset + 1 * 1024 * 1024,
+ 5 * 1024 * 1024)) {
+ test_msg("Left stuff over\n");
+ return -1;
+ }
+
+ __btrfs_remove_free_space_cache(cache->free_space_ctl);
+
+ /*
+ * This blew up before, we have part of the free space in a bitmap and
+ * then the entirety of the rest of the space in an extent. This used
+ * to return -EAGAIN back from btrfs_remove_extent, make sure this
+ * doesn''t happen.
+ */
+ ret = test_add_free_space_entry(cache, 1 * 1024 * 1024, 2 * 1024 * 1024, 1);
+ if (ret) {
+ test_msg("Couldn''t add bitmap entry %d\n", ret);
+ return ret;
+ }
+
+ ret = test_add_free_space_entry(cache, 3 * 1024 * 1024, 1 * 1024 * 1024, 0);
+ if (ret) {
+ test_msg("Couldn''t add extent entry %d\n", ret);
+ return ret;
+ }
+
+ ret = btrfs_remove_free_space(cache, 1 * 1024 * 1024, 3 * 1024 * 1024);
+ if (ret) {
+ test_msg("Error removing bitmap and extent overlapping %d\n", ret);
+ return ret;
+ }
+
+ __btrfs_remove_free_space_cache(cache->free_space_ctl);
+ return 0;
+}
+
+int btrfs_test_free_space_cache(void)
+{
+ struct btrfs_block_group_cache *cache;
+ int ret;
+
+ test_msg("Running btrfs free space cache tests\n");
+
+ cache = init_test_block_group();
+ if (!cache) {
+ test_msg("Couldn''t run the tests\n");
+ return 0;
+ }
+
+ ret = test_extents(cache);
+ if (ret)
+ goto out;
+ ret = test_bitmaps(cache);
+ if (ret)
+ goto out;
+ ret = test_bitmaps_and_extents(cache);
+ if (ret)
+ goto out;
+out:
+ __btrfs_remove_free_space_cache(cache->free_space_ctl);
+ kfree(cache->free_space_ctl);
+ kfree(cache);
+ test_msg("Free space cache tests finished\n");
+ return ret;
+}
--
1.7.7.6
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Filipe David Manana
2013-Aug-15 00:23 UTC
Re: [PATCH] Btrfs: separate out tests into their own directory
On Wed, Aug 14, 2013 at 8:28 PM, Josef Bacik <jbacik@fusionio.com> wrote:> The plan is to have a bunch of unit tests that run when btrfs is loaded when you > build with the appropriate config option. My ultimate goal is to have a test > for every non-static function we have, but at first I''m going to focus on the > things that cause us the most problems. To start out with this just adds a > tests/ directory and moves the existing free space cache tests into that > directory and sets up all of the infrastructure. Thanks, > > Signed-off-by: Josef Bacik <jbacik@fusionio.com>Josef this seems to have broke compilation when sanity checks are not enabled. The following patch fixes it for me at least. Thanks. From d35b256737dd53245c223692a4c16165a0196a5e Mon Sep 17 00:00:00 2001 From: Filipe David Borba Manana <fdmanana@gmail.com> Date: Thu, 15 Aug 2013 01:19:53 +0100 Subject: [PATCH] Btrfs: fix compilation when sanity tests aren''t enabled MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Error was: CC [M] fs/btrfs/super.o CC [M] fs/btrfs/ctree.o CC [M] fs/btrfs/extent-tree.o CC [M] fs/btrfs/print-tree.o fs/btrfs/super.c: In function ‘btrfs_run_sanity_tests’: fs/btrfs/super.c:1771:2: error: implicit declaration of function ‘btrfs_test_free_space_cache’ [-Werror=implicit-function-declaration] cc1: some warnings being treated as errors make[2]: *** [fs/btrfs/super.o] Error 1 make[2]: *** Waiting for unfinished jobs.... make[1]: *** [fs/btrfs] Error 2 make[1]: *** Waiting for unfinished jobs.... make: *** [fs] Error 2 make: *** Waiting for unfinished jobs.... Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> --- fs/btrfs/super.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 8c2d650..e859b4a 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -57,9 +57,7 @@ #include "dev-replace.h" #include "free-space-cache.h" -#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS #include "tests/btrfs-tests.h" -#endif #define CREATE_TRACE_POINTS #include <trace/events/btrfs.h> -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Josef Bacik
2013-Aug-15 13:38 UTC
Re: [PATCH] Btrfs: separate out tests into their own directory
On Thu, Aug 15, 2013 at 01:23:53AM +0100, Filipe David Manana wrote:> On Wed, Aug 14, 2013 at 8:28 PM, Josef Bacik <jbacik@fusionio.com> wrote: > > The plan is to have a bunch of unit tests that run when btrfs is loaded when you > > build with the appropriate config option. My ultimate goal is to have a test > > for every non-static function we have, but at first I''m going to focus on the > > things that cause us the most problems. To start out with this just adds a > > tests/ directory and moves the existing free space cache tests into that > > directory and sets up all of the infrastructure. Thanks, > > > > Signed-off-by: Josef Bacik <jbacik@fusionio.com> > > Josef this seems to have broke compilation when sanity checks are not enabled. > The following patch fixes it for me at least. Thanks. >Weird that''s what I committed but not what I sent to the list, sorry about that. Thanks, Josef -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Josef Bacik
2013-Aug-15 13:56 UTC
Re: [PATCH] Btrfs: separate out tests into their own directory
On Thu, Aug 15, 2013 at 09:38:33AM -0400, Josef Bacik wrote:> On Thu, Aug 15, 2013 at 01:23:53AM +0100, Filipe David Manana wrote: > > On Wed, Aug 14, 2013 at 8:28 PM, Josef Bacik <jbacik@fusionio.com> wrote: > > > The plan is to have a bunch of unit tests that run when btrfs is loaded when you > > > build with the appropriate config option. My ultimate goal is to have a test > > > for every non-static function we have, but at first I''m going to focus on the > > > things that cause us the most problems. To start out with this just adds a > > > tests/ directory and moves the existing free space cache tests into that > > > directory and sets up all of the infrastructure. Thanks, > > > > > > Signed-off-by: Josef Bacik <jbacik@fusionio.com> > > > > Josef this seems to have broke compilation when sanity checks are not enabled. > > The following patch fixes it for me at least. Thanks. > > > > Weird that''s what I committed but not what I sent to the list, sorry about that. > Thanks, >Oh I see, I didn''t actually commit it, oops. Josef -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html