From 9cc63f8bcd560c760d0b12e15bba8f81c86237cf Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Fri, 14 Aug 2026 15:43:51 -0700 Subject: Merge branches 'expcb.2026.07.24a', 'misc.2026.07.30a', 'rcu-tasks.2026.07.30a', 'srcu.2026.08.11a' and 'torture.2026.08.14a' into HEAD Changes: Make expedited grace periods expedite normal RCU callbacks Miscellaneous fixes: * Improve diagnostic output with character task states. * Mark accesses to inform KCSAN of concurrency design. * Move from kmalloc() to kmalloc_obj(). * Documentation updates. * Improve handling of RCU deferred quiescent states. * Clean up unused function arguments and structure fields. * Reduce show_rcu_gp_kthreads() stack space. Tasks RCU updates: * Clean up after SRCU re-implementation of Tasks Trace RCU. * Mark accesses to inform KCSAN of concurrency design. * Add ->lazy_timer status to diagnostic output. * Remove an unnecessary memory barrier. * Fix a data race, courtesy of KCSAN. * Documentation updates. * Convert cond_resched_tasks_rcu_qs() from macro to static inline function. SRCU updates: * Add Rust helpers for SRCU. * Avoid losing queued work at cleanup_srcu_struct() time. Torture-test updates: * Preparation work for immediate RCU priority deboosting. * Test RCU readers from real interrupt handlers (as opposed to softirq). * Simplify code through use of cpumask_next_wrap(). * Improve diagnostic output with character task states. * Add rcutorture.nwriters parameter to allow lightweight stall testing, and rcutorture.stall_only to make doing so easier. * Test an RCU Tasks Trace grace period implying an RCU grace period. * Make RCU Tasks Trace torturing track reader batches. * Fix a data race, courtesy of KCSAN. * Plug a shuffle_tmp_mask memory leak on kthread spawn failure. --- fs/btrfs/tests/extent-buffer-tests.c | 223 +++++++++++++++++++++++++++++++++++ 1 file changed, 223 insertions(+) create mode 100644 fs/btrfs/tests/extent-buffer-tests.c (limited to 'fs/btrfs/tests/extent-buffer-tests.c') diff --git a/fs/btrfs/tests/extent-buffer-tests.c b/fs/btrfs/tests/extent-buffer-tests.c new file mode 100644 index 000000000..6a43a64ba --- /dev/null +++ b/fs/btrfs/tests/extent-buffer-tests.c @@ -0,0 +1,223 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2013 Fusion IO. All rights reserved. + */ + +#include +#include "btrfs-tests.h" +#include "../ctree.h" +#include "../extent_io.h" +#include "../disk-io.h" +#include "../accessors.h" + +static int test_btrfs_split_item(u32 sectorsize, u32 nodesize) +{ + struct btrfs_fs_info *fs_info; + struct btrfs_path *path = NULL; + struct btrfs_root *root = NULL; + struct extent_buffer *eb; + char *value = "mary had a little lamb"; + char *split1 = "mary had a little"; + char *split2 = " lamb"; + char *split3 = "mary"; + char *split4 = " had a little"; + char buf[32]; + struct btrfs_key key; + u32 value_len = strlen(value); + int ret = 0; + + test_msg("running btrfs_split_item tests"); + + fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize); + if (!fs_info) { + test_std_err(TEST_ALLOC_FS_INFO); + return -ENOMEM; + } + + root = btrfs_alloc_dummy_root(fs_info); + if (IS_ERR(root)) { + test_std_err(TEST_ALLOC_ROOT); + ret = PTR_ERR(root); + goto out; + } + + path = btrfs_alloc_path(); + if (!path) { + test_std_err(TEST_ALLOC_PATH); + ret = -ENOMEM; + goto out; + } + + eb = alloc_dummy_extent_buffer(fs_info, nodesize); + path->nodes[0] = eb; + if (!eb) { + test_std_err(TEST_ALLOC_EXTENT_BUFFER); + ret = -ENOMEM; + goto out; + } + path->slots[0] = 0; + + key.objectid = 0; + key.type = BTRFS_EXTENT_CSUM_KEY; + key.offset = 0; + + /* + * Passing a NULL trans handle is fine here, we have a dummy root eb + * and the tree is a single node (level 0). + */ + btrfs_setup_item_for_insert(NULL, root, path, &key, value_len); + write_extent_buffer(eb, value, btrfs_item_ptr_offset(eb, 0), + value_len); + + key.offset = 3; + + /* + * Passing NULL trans here should be safe because we have plenty of + * space in this leaf to split the item without having to split the + * leaf. + */ + ret = btrfs_split_item(NULL, root, path, &key, 17); + if (ret) { + test_err("split item failed %d", ret); + goto out; + } + + /* + * Read the first slot, it should have the original key and contain only + * 'mary had a little' + */ + btrfs_item_key_to_cpu(eb, &key, 0); + if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || + key.offset != 0) { + test_err("invalid key at slot 0"); + ret = -EINVAL; + goto out; + } + + if (btrfs_item_size(eb, 0) != strlen(split1)) { + test_err("invalid len in the first split"); + ret = -EINVAL; + goto out; + } + + read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 0), + strlen(split1)); + if (memcmp(buf, split1, strlen(split1))) { + test_err( +"data in the buffer doesn't match what it should in the first split have='%.*s' want '%s'", + (int)strlen(split1), buf, split1); + ret = -EINVAL; + goto out; + } + + btrfs_item_key_to_cpu(eb, &key, 1); + if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || + key.offset != 3) { + test_err("invalid key at slot 1"); + ret = -EINVAL; + goto out; + } + + if (btrfs_item_size(eb, 1) != strlen(split2)) { + test_err("invalid len in the second split"); + ret = -EINVAL; + goto out; + } + + read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 1), + strlen(split2)); + if (memcmp(buf, split2, strlen(split2))) { + test_err( + "data in the buffer doesn't match what it should in the second split"); + ret = -EINVAL; + goto out; + } + + key.offset = 1; + /* Do it again so we test memmoving the other items in the leaf */ + ret = btrfs_split_item(NULL, root, path, &key, 4); + if (ret) { + test_err("second split item failed %d", ret); + goto out; + } + + btrfs_item_key_to_cpu(eb, &key, 0); + if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || + key.offset != 0) { + test_err("invalid key at slot 0"); + ret = -EINVAL; + goto out; + } + + if (btrfs_item_size(eb, 0) != strlen(split3)) { + test_err("invalid len in the first split"); + ret = -EINVAL; + goto out; + } + + read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 0), + strlen(split3)); + if (memcmp(buf, split3, strlen(split3))) { + test_err( + "data in the buffer doesn't match what it should in the third split"); + ret = -EINVAL; + goto out; + } + + btrfs_item_key_to_cpu(eb, &key, 1); + if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || + key.offset != 1) { + test_err("invalid key at slot 1"); + ret = -EINVAL; + goto out; + } + + if (btrfs_item_size(eb, 1) != strlen(split4)) { + test_err("invalid len in the second split"); + ret = -EINVAL; + goto out; + } + + read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 1), + strlen(split4)); + if (memcmp(buf, split4, strlen(split4))) { + test_err( + "data in the buffer doesn't match what it should in the fourth split"); + ret = -EINVAL; + goto out; + } + + btrfs_item_key_to_cpu(eb, &key, 2); + if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || + key.offset != 3) { + test_err("invalid key at slot 2"); + ret = -EINVAL; + goto out; + } + + if (btrfs_item_size(eb, 2) != strlen(split2)) { + test_err("invalid len in the second split"); + ret = -EINVAL; + goto out; + } + + read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 2), + strlen(split2)); + if (memcmp(buf, split2, strlen(split2))) { + test_err( + "data in the buffer doesn't match what it should in the last chunk"); + ret = -EINVAL; + goto out; + } +out: + btrfs_free_path(path); + btrfs_free_dummy_root(root); + btrfs_free_dummy_fs_info(fs_info); + return ret; +} + +int btrfs_test_extent_buffer_operations(u32 sectorsize, u32 nodesize) +{ + test_msg("running extent buffer operation tests"); + return test_btrfs_split_item(sectorsize, nodesize); +} -- cgit v1.3.1