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authorJosef Bacik <jbacik@fusionio.com>2013-10-11 14:44:09 -0400
committerChris Mason <chris.mason@fusionio.com>2013-11-11 21:57:30 -0500
commitaaedb55bc08f384b7f57dbb3222a511baed4decf (patch)
treea82118fce66fff847e3412eae4ef7c3c3dc5c616 /fs
parent294e30fee35d3151d100cfe59e839c2dbc16a374 (diff)
Btrfs: add tests for btrfs_get_extent
I'm going to be removing hole extents in the near future so I wanted to make a sanity test for btrfs_get_extent to make sure I don't break anything in the meantime. This patch just puts btrfs_get_extent through its paces by giving it a completely unreasonable mapping to look at and make sure it is giving us back maps that make sense. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/btrfs/Makefile3
-rw-r--r--fs/btrfs/ctree.h4
-rw-r--r--fs/btrfs/inode.c8
-rw-r--r--fs/btrfs/super.c3
-rw-r--r--fs/btrfs/tests/btrfs-tests.c8
-rw-r--r--fs/btrfs/tests/btrfs-tests.h5
-rw-r--r--fs/btrfs/tests/inode-tests.c832
7 files changed, 861 insertions, 2 deletions
diff --git a/fs/btrfs/Makefile b/fs/btrfs/Makefile
index cac4f2d001a3..1a44e42d602a 100644
--- a/fs/btrfs/Makefile
+++ b/fs/btrfs/Makefile
@@ -15,4 +15,5 @@ btrfs-$(CONFIG_BTRFS_FS_POSIX_ACL) += acl.o
15btrfs-$(CONFIG_BTRFS_FS_CHECK_INTEGRITY) += check-integrity.o 15btrfs-$(CONFIG_BTRFS_FS_CHECK_INTEGRITY) += check-integrity.o
16 16
17btrfs-$(CONFIG_BTRFS_FS_RUN_SANITY_TESTS) += tests/free-space-tests.o \ 17btrfs-$(CONFIG_BTRFS_FS_RUN_SANITY_TESTS) += tests/free-space-tests.o \
18 tests/extent-buffer-tests.o tests/btrfs-tests.o tests/extent-io-tests.o 18 tests/extent-buffer-tests.o tests/btrfs-tests.o \
19 tests/extent-io-tests.o tests/inode-tests.o
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 2f398062b942..9f5e1cfb0209 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -4034,5 +4034,9 @@ static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
4034 return signal_pending(current); 4034 return signal_pending(current);
4035} 4035}
4036 4036
4037/* Sanity test specific functions */
4038#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4039void btrfs_test_destroy_inode(struct inode *inode);
4040#endif
4037 4041
4038#endif 4042#endif
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index bba7f1a5e9f3..b5c2ad8fe2ca 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -7795,6 +7795,14 @@ struct inode *btrfs_alloc_inode(struct super_block *sb)
7795 return inode; 7795 return inode;
7796} 7796}
7797 7797
7798#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
7799void btrfs_test_destroy_inode(struct inode *inode)
7800{
7801 btrfs_drop_extent_cache(inode, 0, (u64)-1, 0);
7802 kmem_cache_free(btrfs_inode_cachep, BTRFS_I(inode));
7803}
7804#endif
7805
7798static void btrfs_i_callback(struct rcu_head *head) 7806static void btrfs_i_callback(struct rcu_head *head)
7799{ 7807{
7800 struct inode *inode = container_of(head, struct inode, i_rcu); 7808 struct inode *inode = container_of(head, struct inode, i_rcu);
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 78041e34d15a..1f62c1ccab1f 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1802,6 +1802,9 @@ static int btrfs_run_sanity_tests(void)
1802 if (ret) 1802 if (ret)
1803 goto out; 1803 goto out;
1804 ret = btrfs_test_extent_io(); 1804 ret = btrfs_test_extent_io();
1805 if (ret)
1806 goto out;
1807 ret = btrfs_test_inodes();
1805out: 1808out:
1806 btrfs_destroy_test_fs(); 1809 btrfs_destroy_test_fs();
1807 return ret; 1810 return ret;
diff --git a/fs/btrfs/tests/btrfs-tests.c b/fs/btrfs/tests/btrfs-tests.c
index 697d527377c1..757ef00a75a4 100644
--- a/fs/btrfs/tests/btrfs-tests.c
+++ b/fs/btrfs/tests/btrfs-tests.c
@@ -24,11 +24,17 @@
24 24
25static struct vfsmount *test_mnt = NULL; 25static struct vfsmount *test_mnt = NULL;
26 26
27static const struct super_operations btrfs_test_super_ops = {
28 .alloc_inode = btrfs_alloc_inode,
29 .destroy_inode = btrfs_test_destroy_inode,
30};
31
27static struct dentry *btrfs_test_mount(struct file_system_type *fs_type, 32static struct dentry *btrfs_test_mount(struct file_system_type *fs_type,
28 int flags, const char *dev_name, 33 int flags, const char *dev_name,
29 void *data) 34 void *data)
30{ 35{
31 return mount_pseudo(fs_type, "btrfs_test:", NULL, NULL, BTRFS_TEST_MAGIC); 36 return mount_pseudo(fs_type, "btrfs_test:", &btrfs_test_super_ops,
37 NULL, BTRFS_TEST_MAGIC);
32} 38}
33 39
34static struct file_system_type test_type = { 40static struct file_system_type test_type = {
diff --git a/fs/btrfs/tests/btrfs-tests.h b/fs/btrfs/tests/btrfs-tests.h
index e935fe5291e7..b353bc806ca0 100644
--- a/fs/btrfs/tests/btrfs-tests.h
+++ b/fs/btrfs/tests/btrfs-tests.h
@@ -26,6 +26,7 @@
26int btrfs_test_free_space_cache(void); 26int btrfs_test_free_space_cache(void);
27int btrfs_test_extent_buffer_operations(void); 27int btrfs_test_extent_buffer_operations(void);
28int btrfs_test_extent_io(void); 28int btrfs_test_extent_io(void);
29int btrfs_test_inodes(void);
29int btrfs_init_test_fs(void); 30int btrfs_init_test_fs(void);
30void btrfs_destroy_test_fs(void); 31void btrfs_destroy_test_fs(void);
31struct inode *btrfs_new_test_inode(void); 32struct inode *btrfs_new_test_inode(void);
@@ -49,6 +50,10 @@ static inline int btrfs_test_extent_io(void)
49{ 50{
50 return 0; 51 return 0;
51} 52}
53static inline int btrfs_test_inodes(void)
54{
55 return 0;
56}
52#endif 57#endif
53 58
54#endif 59#endif
diff --git a/fs/btrfs/tests/inode-tests.c b/fs/btrfs/tests/inode-tests.c
new file mode 100644
index 000000000000..b0fc3bab2a96
--- /dev/null
+++ b/fs/btrfs/tests/inode-tests.c
@@ -0,0 +1,832 @@
1/*
2 * Copyright (C) 2013 Fusion IO. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
17 */
18
19#include "btrfs-tests.h"
20#include "../ctree.h"
21#include "../btrfs_inode.h"
22#include "../disk-io.h"
23#include "../extent_io.h"
24#include "../volumes.h"
25
26static struct btrfs_fs_info *alloc_dummy_fs_info(void)
27{
28 struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info),
29 GFP_NOFS);
30 if (!fs_info)
31 return fs_info;
32 fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices),
33 GFP_NOFS);
34 if (!fs_info->fs_devices) {
35 kfree(fs_info);
36 return NULL;
37 }
38 return fs_info;
39}
40static void free_dummy_root(struct btrfs_root *root)
41{
42 if (!root)
43 return;
44 if (root->fs_info) {
45 kfree(root->fs_info->fs_devices);
46 kfree(root->fs_info);
47 }
48 if (root->node)
49 free_extent_buffer(root->node);
50 kfree(root);
51}
52
53static void insert_extent(struct btrfs_root *root, u64 start, u64 len,
54 u64 ram_bytes, u64 offset, u64 disk_bytenr,
55 u64 disk_len, u32 type, u8 compression, int slot)
56{
57 struct btrfs_path path;
58 struct btrfs_file_extent_item *fi;
59 struct extent_buffer *leaf = root->node;
60 struct btrfs_key key;
61 u32 value_len = sizeof(struct btrfs_file_extent_item);
62
63 if (type == BTRFS_FILE_EXTENT_INLINE)
64 value_len += len;
65 memset(&path, 0, sizeof(path));
66
67 path.nodes[0] = leaf;
68 path.slots[0] = slot;
69
70 key.objectid = BTRFS_FIRST_FREE_OBJECTID;
71 key.type = BTRFS_EXTENT_DATA_KEY;
72 key.offset = start;
73
74 setup_items_for_insert(root, &path, &key, &value_len, value_len,
75 value_len + sizeof(struct btrfs_item), 1);
76 fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
77 btrfs_set_file_extent_generation(leaf, fi, 1);
78 btrfs_set_file_extent_type(leaf, fi, type);
79 btrfs_set_file_extent_disk_bytenr(leaf, fi, disk_bytenr);
80 btrfs_set_file_extent_disk_num_bytes(leaf, fi, disk_len);
81 btrfs_set_file_extent_offset(leaf, fi, offset);
82 btrfs_set_file_extent_num_bytes(leaf, fi, len);
83 btrfs_set_file_extent_ram_bytes(leaf, fi, ram_bytes);
84 btrfs_set_file_extent_compression(leaf, fi, compression);
85 btrfs_set_file_extent_encryption(leaf, fi, 0);
86 btrfs_set_file_extent_other_encoding(leaf, fi, 0);
87}
88
89/*
90 * Build the most complicated map of extents the earth has ever seen. We want
91 * this so we can test all of the corner cases of btrfs_get_extent. Here is a
92 * diagram of how the extents will look though this may not be possible we still
93 * want to make sure everything acts normally (the last number is not inclusive)
94 *
95 * [0 - 5][5 - 6][6 - 10][10 - 4096][ 4096 - 8192 ][8192 - 12288]
96 * [hole ][inline][ hole ][ regular ][regular1 split][ hole ]
97 *
98 * [ 12288 - 20480][20480 - 24576][ 24576 - 28672 ][28672 - 36864][36864 - 45056]
99 * [regular1 split][ prealloc1 ][prealloc1 written][ prealloc1 ][ compressed ]
100 *
101 * [45056 - 49152][49152-53248][53248-61440][61440-65536][ 65536+81920 ]
102 * [ compressed1 ][ regular ][compressed1][ regular ][ hole but no extent]
103 *
104 * [81920-86016]
105 * [ regular ]
106 */
107static void setup_file_extents(struct btrfs_root *root)
108{
109 int slot = 0;
110 u64 disk_bytenr = 1 * 1024 * 1024;
111 u64 offset = 0;
112
113 /* First we want a hole */
114 insert_extent(root, offset, 5, 5, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
115 slot);
116 slot++;
117 offset += 5;
118
119 /*
120 * Now we want an inline extent, I don't think this is possible but hey
121 * why not? Also keep in mind if we have an inline extent it counts as
122 * the whole first page. If we were to expand it we would have to cow
123 * and we wouldn't have an inline extent anymore.
124 */
125 insert_extent(root, offset, 1, 1, 0, 0, 0, BTRFS_FILE_EXTENT_INLINE, 0,
126 slot);
127 slot++;
128 offset = 4096;
129
130 /* Now another hole */
131 insert_extent(root, offset, 4, 4, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
132 slot);
133 slot++;
134 offset += 4;
135
136 /* Now for a regular extent */
137 insert_extent(root, offset, 4095, 4095, 0, disk_bytenr, 4096,
138 BTRFS_FILE_EXTENT_REG, 0, slot);
139 slot++;
140 disk_bytenr += 4096;
141 offset += 4095;
142
143 /*
144 * Now for 3 extents that were split from a hole punch so we test
145 * offsets properly.
146 */
147 insert_extent(root, offset, 4096, 16384, 0, disk_bytenr, 16384,
148 BTRFS_FILE_EXTENT_REG, 0, slot);
149 slot++;
150 offset += 4096;
151 insert_extent(root, offset, 4096, 4096, 0, 0, 0, BTRFS_FILE_EXTENT_REG,
152 0, slot);
153 slot++;
154 offset += 4096;
155 insert_extent(root, offset, 8192, 16384, 8192, disk_bytenr, 16384,
156 BTRFS_FILE_EXTENT_REG, 0, slot);
157 slot++;
158 offset += 8192;
159 disk_bytenr += 16384;
160
161 /* Now for a unwritten prealloc extent */
162 insert_extent(root, offset, 4096, 4096, 0, disk_bytenr, 4096,
163 BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
164 slot++;
165 offset += 4096;
166
167 /*
168 * We want to jack up disk_bytenr a little more so the em stuff doesn't
169 * merge our records.
170 */
171 disk_bytenr += 8192;
172
173 /*
174 * Now for a partially written prealloc extent, basically the same as
175 * the hole punch example above. Ram_bytes never changes when you mark
176 * extents written btw.
177 */
178 insert_extent(root, offset, 4096, 16384, 0, disk_bytenr, 16384,
179 BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
180 slot++;
181 offset += 4096;
182 insert_extent(root, offset, 4096, 16384, 4096, disk_bytenr, 16384,
183 BTRFS_FILE_EXTENT_REG, 0, slot);
184 slot++;
185 offset += 4096;
186 insert_extent(root, offset, 8192, 16384, 8192, disk_bytenr, 16384,
187 BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
188 slot++;
189 offset += 8192;
190 disk_bytenr += 16384;
191
192 /* Now a normal compressed extent */
193 insert_extent(root, offset, 8192, 8192, 0, disk_bytenr, 4096,
194 BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
195 slot++;
196 offset += 8192;
197 /* No merges */
198 disk_bytenr += 8192;
199
200 /* Now a split compressed extent */
201 insert_extent(root, offset, 4096, 16384, 0, disk_bytenr, 4096,
202 BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
203 slot++;
204 offset += 4096;
205 insert_extent(root, offset, 4096, 4096, 0, disk_bytenr + 4096, 4096,
206 BTRFS_FILE_EXTENT_REG, 0, slot);
207 slot++;
208 offset += 4096;
209 insert_extent(root, offset, 8192, 16384, 8192, disk_bytenr, 4096,
210 BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
211 slot++;
212 offset += 8192;
213 disk_bytenr += 8192;
214
215 /* Now extents that have a hole but no hole extent */
216 insert_extent(root, offset, 4096, 4096, 0, disk_bytenr, 4096,
217 BTRFS_FILE_EXTENT_REG, 0, slot);
218 slot++;
219 offset += 16384;
220 disk_bytenr += 4096;
221 insert_extent(root, offset, 4096, 4096, 0, disk_bytenr, 4096,
222 BTRFS_FILE_EXTENT_REG, 0, slot);
223}
224
225static unsigned long prealloc_only = 0;
226static unsigned long compressed_only = 0;
227static unsigned long vacancy_only = 0;
228
229static noinline int test_btrfs_get_extent(void)
230{
231 struct inode *inode = NULL;
232 struct btrfs_root *root = NULL;
233 struct extent_map *em = NULL;
234 u64 orig_start;
235 u64 disk_bytenr;
236 u64 offset;
237 int ret = -ENOMEM;
238
239 set_bit(EXTENT_FLAG_COMPRESSED, &compressed_only);
240 set_bit(EXTENT_FLAG_VACANCY, &vacancy_only);
241 set_bit(EXTENT_FLAG_PREALLOC, &prealloc_only);
242
243 inode = btrfs_new_test_inode();
244 if (!inode) {
245 test_msg("Couldn't allocate inode\n");
246 return ret;
247 }
248
249 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
250 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
251 BTRFS_I(inode)->location.offset = 0;
252
253 root = btrfs_alloc_dummy_root();
254 if (IS_ERR(root)) {
255 test_msg("Couldn't allocate root\n");
256 goto out;
257 }
258
259 /*
260 * We do this since btrfs_get_extent wants to assign em->bdev to
261 * root->fs_info->fs_devices->latest_bdev.
262 */
263 root->fs_info = alloc_dummy_fs_info();
264 if (!root->fs_info) {
265 test_msg("Couldn't allocate dummy fs info\n");
266 goto out;
267 }
268
269 root->node = alloc_dummy_extent_buffer(0, 4096);
270 if (!root->node) {
271 test_msg("Couldn't allocate dummy buffer\n");
272 goto out;
273 }
274
275 /*
276 * We will just free a dummy node if it's ref count is 2 so we need an
277 * extra ref so our searches don't accidently release our page.
278 */
279 extent_buffer_get(root->node);
280 btrfs_set_header_nritems(root->node, 0);
281 btrfs_set_header_level(root->node, 0);
282 ret = -EINVAL;
283
284 /* First with no extents */
285 BTRFS_I(inode)->root = root;
286 em = btrfs_get_extent(inode, NULL, 0, 0, 4096, 0);
287 if (IS_ERR(em)) {
288 em = NULL;
289 test_msg("Got an error when we shouldn't have\n");
290 goto out;
291 }
292 if (em->block_start != EXTENT_MAP_HOLE) {
293 test_msg("Expected a hole, got %llu\n", em->block_start);
294 goto out;
295 }
296 if (!test_bit(EXTENT_FLAG_VACANCY, &em->flags)) {
297 test_msg("Vacancy flag wasn't set properly\n");
298 goto out;
299 }
300 free_extent_map(em);
301 btrfs_drop_extent_cache(inode, 0, (u64)-1, 0);
302
303 /*
304 * All of the magic numbers are based on the mapping setup in
305 * setup_file_extents, so if you change anything there you need to
306 * update the comment and update the expected values below.
307 */
308 setup_file_extents(root);
309
310 em = btrfs_get_extent(inode, NULL, 0, 0, (u64)-1, 0);
311 if (IS_ERR(em)) {
312 test_msg("Got an error when we shouldn't have\n");
313 goto out;
314 }
315 if (em->block_start != EXTENT_MAP_HOLE) {
316 test_msg("Expected a hole, got %llu\n", em->block_start);
317 goto out;
318 }
319 if (em->start != 0 || em->len != 5) {
320 test_msg("Unexpected extent wanted start 0 len 5, got start "
321 "%llu len %llu\n", em->start, em->len);
322 goto out;
323 }
324 if (em->flags != 0) {
325 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
326 goto out;
327 }
328 offset = em->start + em->len;
329 free_extent_map(em);
330
331 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
332 if (IS_ERR(em)) {
333 test_msg("Got an error when we shouldn't have\n");
334 goto out;
335 }
336 if (em->block_start != EXTENT_MAP_INLINE) {
337 test_msg("Expected an inline, got %llu\n", em->block_start);
338 goto out;
339 }
340 if (em->start != offset || em->len != 4091) {
341 test_msg("Unexpected extent wanted start %llu len 1, got start "
342 "%llu len %llu\n", offset, em->start, em->len);
343 goto out;
344 }
345 if (em->flags != 0) {
346 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
347 goto out;
348 }
349 /*
350 * We don't test anything else for inline since it doesn't get set
351 * unless we have a page for it to write into. Maybe we should change
352 * this?
353 */
354 offset = em->start + em->len;
355 free_extent_map(em);
356
357 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
358 if (IS_ERR(em)) {
359 test_msg("Got an error when we shouldn't have\n");
360 goto out;
361 }
362 if (em->block_start != EXTENT_MAP_HOLE) {
363 test_msg("Expected a hole, got %llu\n", em->block_start);
364 goto out;
365 }
366 if (em->start != offset || em->len != 4) {
367 test_msg("Unexpected extent wanted start %llu len 4, got start "
368 "%llu len %llu\n", offset, em->start, em->len);
369 goto out;
370 }
371 if (em->flags != 0) {
372 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
373 goto out;
374 }
375 offset = em->start + em->len;
376 free_extent_map(em);
377
378 /* Regular extent */
379 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
380 if (IS_ERR(em)) {
381 test_msg("Got an error when we shouldn't have\n");
382 goto out;
383 }
384 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
385 test_msg("Expected a real extent, got %llu\n", em->block_start);
386 goto out;
387 }
388 if (em->start != offset || em->len != 4095) {
389 test_msg("Unexpected extent wanted start %llu len 4095, got "
390 "start %llu len %llu\n", offset, em->start, em->len);
391 goto out;
392 }
393 if (em->flags != 0) {
394 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
395 goto out;
396 }
397 if (em->orig_start != em->start) {
398 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
399 em->orig_start);
400 goto out;
401 }
402 offset = em->start + em->len;
403 free_extent_map(em);
404
405 /* The next 3 are split extents */
406 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
407 if (IS_ERR(em)) {
408 test_msg("Got an error when we shouldn't have\n");
409 goto out;
410 }
411 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
412 test_msg("Expected a real extent, got %llu\n", em->block_start);
413 goto out;
414 }
415 if (em->start != offset || em->len != 4096) {
416 test_msg("Unexpected extent wanted start %llu len 4096, got "
417 "start %llu len %llu\n", offset, em->start, em->len);
418 goto out;
419 }
420 if (em->flags != 0) {
421 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
422 goto out;
423 }
424 if (em->orig_start != em->start) {
425 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
426 em->orig_start);
427 goto out;
428 }
429 disk_bytenr = em->block_start;
430 orig_start = em->start;
431 offset = em->start + em->len;
432 free_extent_map(em);
433
434 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
435 if (IS_ERR(em)) {
436 test_msg("Got an error when we shouldn't have\n");
437 goto out;
438 }
439 if (em->block_start != EXTENT_MAP_HOLE) {
440 test_msg("Expected a hole, got %llu\n", em->block_start);
441 goto out;
442 }
443 if (em->start != offset || em->len != 4096) {
444 test_msg("Unexpected extent wanted start %llu len 4096, got "
445 "start %llu len %llu\n", offset, em->start, em->len);
446 goto out;
447 }
448 if (em->flags != 0) {
449 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
450 goto out;
451 }
452 offset = em->start + em->len;
453 free_extent_map(em);
454
455 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
456 if (IS_ERR(em)) {
457 test_msg("Got an error when we shouldn't have\n");
458 goto out;
459 }
460 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
461 test_msg("Expected a real extent, got %llu\n", em->block_start);
462 goto out;
463 }
464 if (em->start != offset || em->len != 8192) {
465 test_msg("Unexpected extent wanted start %llu len 8192, got "
466 "start %llu len %llu\n", offset, em->start, em->len);
467 goto out;
468 }
469 if (em->flags != 0) {
470 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
471 goto out;
472 }
473 if (em->orig_start != orig_start) {
474 test_msg("Wrong orig offset, want %llu, have %llu\n",
475 orig_start, em->orig_start);
476 goto out;
477 }
478 disk_bytenr += (em->start - orig_start);
479 if (em->block_start != disk_bytenr) {
480 test_msg("Wrong block start, want %llu, have %llu\n",
481 disk_bytenr, em->block_start);
482 goto out;
483 }
484 offset = em->start + em->len;
485 free_extent_map(em);
486
487 /* Prealloc extent */
488 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
489 if (IS_ERR(em)) {
490 test_msg("Got an error when we shouldn't have\n");
491 goto out;
492 }
493 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
494 test_msg("Expected a real extent, got %llu\n", em->block_start);
495 goto out;
496 }
497 if (em->start != offset || em->len != 4096) {
498 test_msg("Unexpected extent wanted start %llu len 4096, got "
499 "start %llu len %llu\n", offset, em->start, em->len);
500 goto out;
501 }
502 if (em->flags != prealloc_only) {
503 test_msg("Unexpected flags set, want %lu have %lu\n",
504 prealloc_only, em->flags);
505 goto out;
506 }
507 if (em->orig_start != em->start) {
508 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
509 em->orig_start);
510 goto out;
511 }
512 offset = em->start + em->len;
513 free_extent_map(em);
514
515 /* The next 3 are a half written prealloc extent */
516 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
517 if (IS_ERR(em)) {
518 test_msg("Got an error when we shouldn't have\n");
519 goto out;
520 }
521 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
522 test_msg("Expected a real extent, got %llu\n", em->block_start);
523 goto out;
524 }
525 if (em->start != offset || em->len != 4096) {
526 test_msg("Unexpected extent wanted start %llu len 4096, got "
527 "start %llu len %llu\n", offset, em->start, em->len);
528 goto out;
529 }
530 if (em->flags != prealloc_only) {
531 test_msg("Unexpected flags set, want %lu have %lu\n",
532 prealloc_only, em->flags);
533 goto out;
534 }
535 if (em->orig_start != em->start) {
536 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
537 em->orig_start);
538 goto out;
539 }
540 disk_bytenr = em->block_start;
541 orig_start = em->start;
542 offset = em->start + em->len;
543 free_extent_map(em);
544
545 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
546 if (IS_ERR(em)) {
547 test_msg("Got an error when we shouldn't have\n");
548 goto out;
549 }
550 if (em->block_start >= EXTENT_MAP_HOLE) {
551 test_msg("Expected a real extent, got %llu\n", em->block_start);
552 goto out;
553 }
554 if (em->start != offset || em->len != 4096) {
555 test_msg("Unexpected extent wanted start %llu len 4096, got "
556 "start %llu len %llu\n", offset, em->start, em->len);
557 goto out;
558 }
559 if (em->flags != 0) {
560 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
561 goto out;
562 }
563 if (em->orig_start != orig_start) {
564 test_msg("Unexpected orig offset, wanted %llu, have %llu\n",
565 orig_start, em->orig_start);
566 goto out;
567 }
568 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
569 test_msg("Unexpected block start, wanted %llu, have %llu\n",
570 disk_bytenr + (em->start - em->orig_start),
571 em->block_start);
572 goto out;
573 }
574 offset = em->start + em->len;
575 free_extent_map(em);
576
577 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
578 if (IS_ERR(em)) {
579 test_msg("Got an error when we shouldn't have\n");
580 goto out;
581 }
582 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
583 test_msg("Expected a real extent, got %llu\n", em->block_start);
584 goto out;
585 }
586 if (em->start != offset || em->len != 8192) {
587 test_msg("Unexpected extent wanted start %llu len 8192, got "
588 "start %llu len %llu\n", offset, em->start, em->len);
589 goto out;
590 }
591 if (em->flags != prealloc_only) {
592 test_msg("Unexpected flags set, want %lu have %lu\n",
593 prealloc_only, em->flags);
594 goto out;
595 }
596 if (em->orig_start != orig_start) {
597 test_msg("Wrong orig offset, want %llu, have %llu\n", orig_start,
598 em->orig_start);
599 goto out;
600 }
601 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
602 test_msg("Unexpected block start, wanted %llu, have %llu\n",
603 disk_bytenr + (em->start - em->orig_start),
604 em->block_start);
605 goto out;
606 }
607 offset = em->start + em->len;
608 free_extent_map(em);
609
610 /* Now for the compressed extent */
611 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
612 if (IS_ERR(em)) {
613 test_msg("Got an error when we shouldn't have\n");
614 goto out;
615 }
616 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
617 test_msg("Expected a real extent, got %llu\n", em->block_start);
618 goto out;
619 }
620 if (em->start != offset || em->len != 8192) {
621 test_msg("Unexpected extent wanted start %llu len 8192, got "
622 "start %llu len %llu\n", offset, em->start, em->len);
623 goto out;
624 }
625 if (em->flags != compressed_only) {
626 test_msg("Unexpected flags set, want %lu have %lu\n",
627 compressed_only, em->flags);
628 goto out;
629 }
630 if (em->orig_start != em->start) {
631 test_msg("Wrong orig offset, want %llu, have %llu\n",
632 em->start, em->orig_start);
633 goto out;
634 }
635 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
636 test_msg("Unexpected compress type, wanted %d, got %d\n",
637 BTRFS_COMPRESS_ZLIB, em->compress_type);
638 goto out;
639 }
640 offset = em->start + em->len;
641 free_extent_map(em);
642
643 /* Split compressed extent */
644 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
645 if (IS_ERR(em)) {
646 test_msg("Got an error when we shouldn't have\n");
647 goto out;
648 }
649 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
650 test_msg("Expected a real extent, got %llu\n", em->block_start);
651 goto out;
652 }
653 if (em->start != offset || em->len != 4096) {
654 test_msg("Unexpected extent wanted start %llu len 4096, got "
655 "start %llu len %llu\n", offset, em->start, em->len);
656 goto out;
657 }
658 if (em->flags != compressed_only) {
659 test_msg("Unexpected flags set, want %lu have %lu\n",
660 compressed_only, em->flags);
661 goto out;
662 }
663 if (em->orig_start != em->start) {
664 test_msg("Wrong orig offset, want %llu, have %llu\n",
665 em->start, em->orig_start);
666 goto out;
667 }
668 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
669 test_msg("Unexpected compress type, wanted %d, got %d\n",
670 BTRFS_COMPRESS_ZLIB, em->compress_type);
671 goto out;
672 }
673 disk_bytenr = em->block_start;
674 orig_start = em->start;
675 offset = em->start + em->len;
676 free_extent_map(em);
677
678 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
679 if (IS_ERR(em)) {
680 test_msg("Got an error when we shouldn't have\n");
681 goto out;
682 }
683 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
684 test_msg("Expected a real extent, got %llu\n", em->block_start);
685 goto out;
686 }
687 if (em->start != offset || em->len != 4096) {
688 test_msg("Unexpected extent wanted start %llu len 4096, got "
689 "start %llu len %llu\n", offset, em->start, em->len);
690 goto out;
691 }
692 if (em->flags != 0) {
693 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
694 goto out;
695 }
696 if (em->orig_start != em->start) {
697 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
698 em->orig_start);
699 goto out;
700 }
701 offset = em->start + em->len;
702 free_extent_map(em);
703
704 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
705 if (IS_ERR(em)) {
706 test_msg("Got an error when we shouldn't have\n");
707 goto out;
708 }
709 if (em->block_start != disk_bytenr) {
710 test_msg("Block start does not match, want %llu got %llu\n",
711 disk_bytenr, em->block_start);
712 goto out;
713 }
714 if (em->start != offset || em->len != 8192) {
715 test_msg("Unexpected extent wanted start %llu len 8192, got "
716 "start %llu len %llu\n", offset, em->start, em->len);
717 goto out;
718 }
719 if (em->flags != compressed_only) {
720 test_msg("Unexpected flags set, want %lu have %lu\n",
721 compressed_only, em->flags);
722 goto out;
723 }
724 if (em->orig_start != orig_start) {
725 test_msg("Wrong orig offset, want %llu, have %llu\n",
726 em->start, orig_start);
727 goto out;
728 }
729 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
730 test_msg("Unexpected compress type, wanted %d, got %d\n",
731 BTRFS_COMPRESS_ZLIB, em->compress_type);
732 goto out;
733 }
734 offset = em->start + em->len;
735 free_extent_map(em);
736
737 /* A hole between regular extents but no hole extent */
738 em = btrfs_get_extent(inode, NULL, 0, offset + 6, 4096, 0);
739 if (IS_ERR(em)) {
740 test_msg("Got an error when we shouldn't have\n");
741 goto out;
742 }
743 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
744 test_msg("Expected a real extent, got %llu\n", em->block_start);
745 goto out;
746 }
747 if (em->start != offset || em->len != 4096) {
748 test_msg("Unexpected extent wanted start %llu len 4096, got "
749 "start %llu len %llu\n", offset, em->start, em->len);
750 goto out;
751 }
752 if (em->flags != 0) {
753 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
754 goto out;
755 }
756 if (em->orig_start != em->start) {
757 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
758 em->orig_start);
759 goto out;
760 }
761 offset = em->start + em->len;
762 free_extent_map(em);
763
764 em = btrfs_get_extent(inode, NULL, 0, offset, 4096 * 1024, 0);
765 if (IS_ERR(em)) {
766 test_msg("Got an error when we shouldn't have\n");
767 goto out;
768 }
769 if (em->block_start != EXTENT_MAP_HOLE) {
770 test_msg("Expected a hole extent, got %llu\n", em->block_start);
771 goto out;
772 }
773 /*
774 * Currently we just return a length that we requested rather than the
775 * length of the actual hole, if this changes we'll have to change this
776 * test.
777 */
778 if (em->start != offset || em->len != 12288) {
779 test_msg("Unexpected extent wanted start %llu len 12288, got "
780 "start %llu len %llu\n", offset, em->start, em->len);
781 goto out;
782 }
783 if (em->flags != vacancy_only) {
784 test_msg("Unexpected flags set, want %lu have %lu\n",
785 vacancy_only, em->flags);
786 goto out;
787 }
788 if (em->orig_start != em->start) {
789 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
790 em->orig_start);
791 goto out;
792 }
793 offset = em->start + em->len;
794 free_extent_map(em);
795
796 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
797 if (IS_ERR(em)) {
798 test_msg("Got an error when we shouldn't have\n");
799 goto out;
800 }
801 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
802 test_msg("Expected a real extent, got %llu\n", em->block_start);
803 goto out;
804 }
805 if (em->start != offset || em->len != 4096) {
806 test_msg("Unexpected extent wanted start %llu len 4096, got "
807 "start %llu len %llu\n", offset, em->start, em->len);
808 goto out;
809 }
810 if (em->flags != 0) {
811 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
812 goto out;
813 }
814 if (em->orig_start != em->start) {
815 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
816 em->orig_start);
817 goto out;
818 }
819 ret = 0;
820out:
821 if (!IS_ERR(em))
822 free_extent_map(em);
823 iput(inode);
824 free_dummy_root(root);
825 return ret;
826}
827
828int btrfs_test_inodes(void)
829{
830 test_msg("Running btrfs_get_extent tests\n");
831 return test_btrfs_get_extent();
832}
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-25 06:45:27 -0500