^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2017 Oracle. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include "btrfs-tests.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include "../ctree.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include "../volumes.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include "../disk-io.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include "../block-group.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) static void free_extent_map_tree(struct extent_map_tree *em_tree)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) struct extent_map *em;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) struct rb_node *node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) while (!RB_EMPTY_ROOT(&em_tree->map.rb_root)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) node = rb_first_cached(&em_tree->map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) em = rb_entry(node, struct extent_map, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) remove_extent_mapping(em_tree, em);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #ifdef CONFIG_BTRFS_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) if (refcount_read(&em->refs) != 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) test_err(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) "em leak: em (start 0x%llx len 0x%llx block_start 0x%llx block_len 0x%llx) refs %d",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) em->start, em->len, em->block_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) em->block_len, refcount_read(&em->refs));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) refcount_set(&em->refs, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) free_extent_map(em);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * Test scenario:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * Suppose that no extent map has been loaded into memory yet, there is a file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * extent [0, 16K), followed by another file extent [16K, 20K), two dio reads
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * are entering btrfs_get_extent() concurrently, t1 is reading [8K, 16K), t2 is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * reading [0, 8K)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * t1 t2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) * btrfs_get_extent() btrfs_get_extent()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) * -> lookup_extent_mapping() ->lookup_extent_mapping()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * -> add_extent_mapping(0, 16K)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) * -> return em
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) * ->add_extent_mapping(0, 16K)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) * -> #handle -EEXIST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) static int test_case_1(struct btrfs_fs_info *fs_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) struct extent_map_tree *em_tree)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) struct extent_map *em;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) u64 start = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) u64 len = SZ_8K;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) em = alloc_extent_map();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) if (!em) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) test_std_err(TEST_ALLOC_EXTENT_MAP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) /* Add [0, 16K) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) em->start = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) em->len = SZ_16K;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) em->block_start = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) em->block_len = SZ_16K;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) write_lock(&em_tree->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) ret = add_extent_mapping(em_tree, em, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) write_unlock(&em_tree->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) test_err("cannot add extent range [0, 16K)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) free_extent_map(em);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) /* Add [16K, 20K) following [0, 16K) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) em = alloc_extent_map();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) if (!em) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) test_std_err(TEST_ALLOC_EXTENT_MAP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) em->start = SZ_16K;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) em->len = SZ_4K;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) em->block_start = SZ_32K; /* avoid merging */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) em->block_len = SZ_4K;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) write_lock(&em_tree->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) ret = add_extent_mapping(em_tree, em, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) write_unlock(&em_tree->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) test_err("cannot add extent range [16K, 20K)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) free_extent_map(em);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) em = alloc_extent_map();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) if (!em) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) test_std_err(TEST_ALLOC_EXTENT_MAP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) /* Add [0, 8K), should return [0, 16K) instead. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) em->start = start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) em->len = len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) em->block_start = start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) em->block_len = len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) write_lock(&em_tree->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, em->start, em->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) write_unlock(&em_tree->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) test_err("case1 [%llu %llu]: ret %d", start, start + len, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if (em &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) (em->start != 0 || extent_map_end(em) != SZ_16K ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) em->block_start != 0 || em->block_len != SZ_16K)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) test_err(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) "case1 [%llu %llu]: ret %d return a wrong em (start %llu len %llu block_start %llu block_len %llu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) start, start + len, ret, em->start, em->len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) em->block_start, em->block_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) free_extent_map(em);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) free_extent_map_tree(em_tree);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) * Test scenario:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) * Reading the inline ending up with EEXIST, ie. read an inline
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) * extent and discard page cache and read it again.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) static int test_case_2(struct btrfs_fs_info *fs_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) struct extent_map_tree *em_tree)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) struct extent_map *em;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) em = alloc_extent_map();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) if (!em) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) test_std_err(TEST_ALLOC_EXTENT_MAP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) /* Add [0, 1K) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) em->start = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) em->len = SZ_1K;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) em->block_start = EXTENT_MAP_INLINE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) em->block_len = (u64)-1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) write_lock(&em_tree->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) ret = add_extent_mapping(em_tree, em, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) write_unlock(&em_tree->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) test_err("cannot add extent range [0, 1K)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) free_extent_map(em);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) /* Add [4K, 8K) following [0, 1K) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) em = alloc_extent_map();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) if (!em) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) test_std_err(TEST_ALLOC_EXTENT_MAP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) em->start = SZ_4K;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) em->len = SZ_4K;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) em->block_start = SZ_4K;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) em->block_len = SZ_4K;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) write_lock(&em_tree->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) ret = add_extent_mapping(em_tree, em, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) write_unlock(&em_tree->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) test_err("cannot add extent range [4K, 8K)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) free_extent_map(em);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) em = alloc_extent_map();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) if (!em) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) test_std_err(TEST_ALLOC_EXTENT_MAP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) /* Add [0, 1K) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) em->start = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) em->len = SZ_1K;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) em->block_start = EXTENT_MAP_INLINE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) em->block_len = (u64)-1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) write_lock(&em_tree->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, em->start, em->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) write_unlock(&em_tree->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) test_err("case2 [0 1K]: ret %d", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) if (em &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) (em->start != 0 || extent_map_end(em) != SZ_1K ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) em->block_start != EXTENT_MAP_INLINE || em->block_len != (u64)-1)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) test_err(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) "case2 [0 1K]: ret %d return a wrong em (start %llu len %llu block_start %llu block_len %llu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) ret, em->start, em->len, em->block_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) em->block_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) free_extent_map(em);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) free_extent_map_tree(em_tree);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) static int __test_case_3(struct btrfs_fs_info *fs_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) struct extent_map_tree *em_tree, u64 start)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) struct extent_map *em;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) u64 len = SZ_4K;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) em = alloc_extent_map();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) if (!em) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) test_std_err(TEST_ALLOC_EXTENT_MAP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) /* Add [4K, 8K) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) em->start = SZ_4K;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) em->len = SZ_4K;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) em->block_start = SZ_4K;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) em->block_len = SZ_4K;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) write_lock(&em_tree->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) ret = add_extent_mapping(em_tree, em, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) write_unlock(&em_tree->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) test_err("cannot add extent range [4K, 8K)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) free_extent_map(em);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) em = alloc_extent_map();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) if (!em) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) test_std_err(TEST_ALLOC_EXTENT_MAP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) /* Add [0, 16K) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) em->start = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) em->len = SZ_16K;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) em->block_start = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) em->block_len = SZ_16K;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) write_lock(&em_tree->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, start, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) write_unlock(&em_tree->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) test_err("case3 [0x%llx 0x%llx): ret %d",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) start, start + len, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) * Since bytes within em are contiguous, em->block_start is identical to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) * em->start.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) if (em &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) (start < em->start || start + len > extent_map_end(em) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) em->start != em->block_start || em->len != em->block_len)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) test_err(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) "case3 [0x%llx 0x%llx): ret %d em (start 0x%llx len 0x%llx block_start 0x%llx block_len 0x%llx)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) start, start + len, ret, em->start, em->len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) em->block_start, em->block_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) free_extent_map(em);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) free_extent_map_tree(em_tree);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) * Test scenario:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) * Suppose that no extent map has been loaded into memory yet.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) * There is a file extent [0, 16K), two jobs are running concurrently
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) * against it, t1 is buffered writing to [4K, 8K) and t2 is doing dio
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) * read from [0, 4K) or [8K, 12K) or [12K, 16K).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) * t1 goes ahead of t2 and adds em [4K, 8K) into tree.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) * t1 t2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) * cow_file_range() btrfs_get_extent()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) * -> lookup_extent_mapping()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) * -> add_extent_mapping()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) * -> add_extent_mapping()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) static int test_case_3(struct btrfs_fs_info *fs_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) struct extent_map_tree *em_tree)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) ret = __test_case_3(fs_info, em_tree, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) ret = __test_case_3(fs_info, em_tree, SZ_8K);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) ret = __test_case_3(fs_info, em_tree, (12 * SZ_1K));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) static int __test_case_4(struct btrfs_fs_info *fs_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) struct extent_map_tree *em_tree, u64 start)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) struct extent_map *em;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) u64 len = SZ_4K;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) em = alloc_extent_map();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) if (!em) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) test_std_err(TEST_ALLOC_EXTENT_MAP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) /* Add [0K, 8K) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) em->start = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) em->len = SZ_8K;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) em->block_start = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) em->block_len = SZ_8K;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) write_lock(&em_tree->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) ret = add_extent_mapping(em_tree, em, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) write_unlock(&em_tree->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) test_err("cannot add extent range [0, 8K)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) free_extent_map(em);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) em = alloc_extent_map();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) if (!em) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) test_std_err(TEST_ALLOC_EXTENT_MAP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) /* Add [8K, 32K) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) em->start = SZ_8K;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) em->len = 24 * SZ_1K;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) em->block_start = SZ_16K; /* avoid merging */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) em->block_len = 24 * SZ_1K;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) write_lock(&em_tree->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) ret = add_extent_mapping(em_tree, em, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) write_unlock(&em_tree->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) test_err("cannot add extent range [8K, 32K)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) free_extent_map(em);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) em = alloc_extent_map();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) if (!em) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) test_std_err(TEST_ALLOC_EXTENT_MAP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) /* Add [0K, 32K) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) em->start = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) em->len = SZ_32K;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) em->block_start = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) em->block_len = SZ_32K;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) write_lock(&em_tree->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, start, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) write_unlock(&em_tree->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) test_err("case4 [0x%llx 0x%llx): ret %d",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) start, len, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) if (em && (start < em->start || start + len > extent_map_end(em))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) test_err(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) "case4 [0x%llx 0x%llx): ret %d, added wrong em (start 0x%llx len 0x%llx block_start 0x%llx block_len 0x%llx)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) start, len, ret, em->start, em->len, em->block_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) em->block_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) free_extent_map(em);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) free_extent_map_tree(em_tree);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) * Test scenario:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) * Suppose that no extent map has been loaded into memory yet.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) * There is a file extent [0, 32K), two jobs are running concurrently
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) * against it, t1 is doing dio write to [8K, 32K) and t2 is doing dio
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) * read from [0, 4K) or [4K, 8K).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) * t1 goes ahead of t2 and splits em [0, 32K) to em [0K, 8K) and [8K 32K).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) * t1 t2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) * btrfs_get_blocks_direct() btrfs_get_blocks_direct()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) * -> btrfs_get_extent() -> btrfs_get_extent()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) * -> lookup_extent_mapping()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) * -> add_extent_mapping() -> lookup_extent_mapping()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) * # load [0, 32K)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) * -> btrfs_new_extent_direct()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) * -> btrfs_drop_extent_cache()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) * # split [0, 32K)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) * -> add_extent_mapping()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) * # add [8K, 32K)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) * -> add_extent_mapping()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) * # handle -EEXIST when adding
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) * # [0, 32K)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) static int test_case_4(struct btrfs_fs_info *fs_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) struct extent_map_tree *em_tree)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) ret = __test_case_4(fs_info, em_tree, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) ret = __test_case_4(fs_info, em_tree, SZ_4K);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) struct rmap_test_vector {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) u64 raid_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) u64 physical_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) u64 data_stripe_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) u64 num_data_stripes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) u64 num_stripes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) /* Assume we won't have more than 5 physical stripes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) u64 data_stripe_phys_start[5];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) bool expected_mapped_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) /* Physical to logical addresses */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) u64 mapped_logical[5];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) static int test_rmap_block(struct btrfs_fs_info *fs_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) struct rmap_test_vector *test)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) struct extent_map *em;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) struct map_lookup *map = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) u64 *logical = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) int i, out_ndaddrs, out_stripe_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) em = alloc_extent_map();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) if (!em) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) test_std_err(TEST_ALLOC_EXTENT_MAP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) map = kmalloc(map_lookup_size(test->num_stripes), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) if (!map) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) kfree(em);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) test_std_err(TEST_ALLOC_EXTENT_MAP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) set_bit(EXTENT_FLAG_FS_MAPPING, &em->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) /* Start at 4GiB logical address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) em->start = SZ_4G;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) em->len = test->data_stripe_size * test->num_data_stripes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) em->block_len = em->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) em->orig_block_len = test->data_stripe_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) em->map_lookup = map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) map->num_stripes = test->num_stripes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) map->stripe_len = BTRFS_STRIPE_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) map->type = test->raid_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) for (i = 0; i < map->num_stripes; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) struct btrfs_device *dev = btrfs_alloc_dummy_device(fs_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) if (IS_ERR(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) test_err("cannot allocate device");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) ret = PTR_ERR(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) map->stripes[i].dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) map->stripes[i].physical = test->data_stripe_phys_start[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) write_lock(&fs_info->mapping_tree.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) ret = add_extent_mapping(&fs_info->mapping_tree, em, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) write_unlock(&fs_info->mapping_tree.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) test_err("error adding block group mapping to mapping tree");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) goto out_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) ret = btrfs_rmap_block(fs_info, em->start, btrfs_sb_offset(1),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) &logical, &out_ndaddrs, &out_stripe_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) if (ret || (out_ndaddrs == 0 && test->expected_mapped_addr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) test_err("didn't rmap anything but expected %d",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) test->expected_mapped_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) if (out_stripe_len != BTRFS_STRIPE_LEN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) test_err("calculated stripe length doesn't match");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) if (out_ndaddrs != test->expected_mapped_addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) for (i = 0; i < out_ndaddrs; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) test_msg("mapped %llu", logical[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) test_err("unexpected number of mapped addresses: %d", out_ndaddrs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) for (i = 0; i < out_ndaddrs; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) if (logical[i] != test->mapped_logical[i]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) test_err("unexpected logical address mapped");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) write_lock(&fs_info->mapping_tree.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) remove_extent_mapping(&fs_info->mapping_tree, em);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) write_unlock(&fs_info->mapping_tree.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) /* For us */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) free_extent_map(em);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) out_free:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) /* For the tree */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) free_extent_map(em);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) kfree(logical);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) int btrfs_test_extent_map(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) struct btrfs_fs_info *fs_info = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) struct extent_map_tree *em_tree;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) int ret = 0, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) struct rmap_test_vector rmap_tests[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) * Test a chunk with 2 data stripes one of which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) * interesects the physical address of the super block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) * is correctly recognised.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) .raid_type = BTRFS_BLOCK_GROUP_RAID1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) .physical_start = SZ_64M - SZ_4M,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) .data_stripe_size = SZ_256M,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) .num_data_stripes = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) .num_stripes = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) .data_stripe_phys_start =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) {SZ_64M - SZ_4M, SZ_64M - SZ_4M + SZ_256M},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) .expected_mapped_addr = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) .mapped_logical= {SZ_4G + SZ_4M}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) * Test that out-of-range physical addresses are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) * ignored
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) /* SINGLE chunk type */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) .raid_type = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) .physical_start = SZ_4G,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) .data_stripe_size = SZ_256M,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) .num_data_stripes = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) .num_stripes = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) .data_stripe_phys_start = {SZ_256M},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) .expected_mapped_addr = false,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) .mapped_logical = {0}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) test_msg("running extent_map tests");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) * Note: the fs_info is not set up completely, we only need
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) * fs_info::fsid for the tracepoint.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) fs_info = btrfs_alloc_dummy_fs_info(PAGE_SIZE, PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) if (!fs_info) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) test_std_err(TEST_ALLOC_FS_INFO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) em_tree = kzalloc(sizeof(*em_tree), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) if (!em_tree) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) extent_map_tree_init(em_tree);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) ret = test_case_1(fs_info, em_tree);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) ret = test_case_2(fs_info, em_tree);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) ret = test_case_3(fs_info, em_tree);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) ret = test_case_4(fs_info, em_tree);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) test_msg("running rmap tests");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) for (i = 0; i < ARRAY_SIZE(rmap_tests); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) ret = test_rmap_block(fs_info, &rmap_tests[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) kfree(em_tree);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) btrfs_free_dummy_fs_info(fs_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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