From 034dd340b08be1f2f0477ad16131d609f9dbd53c Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sun, 30 Aug 2026 09:22:00 -0700 Subject: Merge tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace Pull tracing fixes from Steven Rostedt: - Fix error output of boot instance creation failure Currently if a boot instance creation fails, instead of printing out the name of the instance that failed, it prints "(null)". That is because it prints "cur_str" that had already been processed by strsep(). Print the saved name instead. While at it, print the error code of the failure. - Fix use-after-free for same named historgrams Histograms can be named so that they can be used in multiple events. But if the named histogram has a variable attached, the second event that uses the named histogram which duplicates it and needs to free the original after duplication leaves the old variable in place and still visible. If another histogram uses than variable, it will use the stale one which will try to reference the freed duplicate histogram and crash the kernel. Free the duplicate variables along with the duplicated histogram data. - Check return value of kthread_run() in event self test The events self tests uses a kthread for testing but does not check if it succeeded in creating a kthread. If the kthread creation were to fail, the code will still try to call kthread_stop() on the error returned. - Fix race between reading trace_pipe and updating subbuffer size If a user is reading the trace_pipe file at the same time they update the ring buffer sub-buffer size, can cause the trace_pipe read to read stale data. Add trace_access_lock() around updating the ring buffer sub-buffer size. - Fix eventfs_inode on failure path in creation of the events directory In the creation of the "events" directory, if after allocating the eventfs_inode a failure is detected, it calls cleanup_ei() which calls free_ei(). The free_ei() will test if eventfs_inode being freed has no children. It is a bug if it does. But on the failure case of the creation of the "events" directory, the children lists have not yet been initialized and the free will trigger a warning because list_empty() on an uninitialized list returns false. Move the initialization into init_ei() where it makes more sense and makes sure that a created eventfs_inode has its lists initialized upon creation. - Check return value of kthread_run() in ftrace direct sample code The sample code that shows how to use the ftrace direct calls does not test the return of kthread_run() to see if it succeeds. Return a failure if the kthread_run() doesn't succeed. - Clear user events state on fork in case of alloc failure On fork, the child gets a pointer to the parent's user events state. It makes a copy of it then updates the child's pointer to it. But if the allocation fails, the duplication function leaves the child with a pointer to its parent's descriptor. When the child cleans up its data, it will free the parent's descriptor while the parent is still using it. In the duplication function, set the child's user_event_mm to NULL before testing if the allocation succeeded, and when it exits it will not free the parent's descriptor. - Fix retry exhaustion in simple ring buffer reader swap simple_ring_buffer_swap_reader_page() starts with retry set to 8 and post-decrements it only after a failed link replacement. On the final attempt, a successful replacement leaves retry at zero, while a failed replacement leaves it at -1. But the check for success expects the retry value to be non-zero and exits with an error on zero. This is the opposite result. Fix it. - Fail nicely when the remote swap_reader_page() returns an error Currently, if the swap_reader_page() of a remote buffer fails, it triggers a WARN_ON_ONCE() and continues normally. Instead, have it exit with an error and a pr_warn() print instead of a full WARNING. * tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: ring-buffer: Stop remote reader update when page swap fails tracing: Fix retry exhaustion in simple ring buffer reader swap tracing/user_events: Clear copied tracing state before fork duplication samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-modify eventfs: Initialize ei->children and ei->list in init_ei() tracing: Fix use-after-free in trace_pipe read on sub-buffer order change tracing: Fix crash passing ERR_PTR to kthread_stop() tracing: Fix use-after-free with same-name named triggers tracing: Fix logged instance name on creation failure --- fs/btrfs/tests/inode-tests.c | 1095 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1095 insertions(+) create mode 100644 fs/btrfs/tests/inode-tests.c (limited to 'fs/btrfs/tests/inode-tests.c') diff --git a/fs/btrfs/tests/inode-tests.c b/fs/btrfs/tests/inode-tests.c new file mode 100644 index 000000000..b04fbcaf0 --- /dev/null +++ b/fs/btrfs/tests/inode-tests.c @@ -0,0 +1,1095 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2013 Fusion IO. All rights reserved. + */ + +#include +#include "btrfs-tests.h" +#include "../ctree.h" +#include "../btrfs_inode.h" +#include "../disk-io.h" +#include "../extent_io.h" +#include "../volumes.h" +#include "../compression.h" +#include "../accessors.h" + +static void insert_extent(struct btrfs_root *root, u64 start, u64 len, + u64 ram_bytes, u64 offset, u64 disk_bytenr, + u64 disk_len, u32 type, u8 compression, int slot) +{ + struct btrfs_path path; + struct btrfs_file_extent_item *fi; + struct extent_buffer *leaf = root->node; + struct btrfs_key key; + u32 value_len = sizeof(struct btrfs_file_extent_item); + + if (type == BTRFS_FILE_EXTENT_INLINE) + value_len += len; + memset(&path, 0, sizeof(path)); + + path.nodes[0] = leaf; + path.slots[0] = slot; + + key.objectid = BTRFS_FIRST_FREE_OBJECTID; + key.type = BTRFS_EXTENT_DATA_KEY; + key.offset = start; + + /* + * 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); + fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item); + btrfs_set_file_extent_generation(leaf, fi, 1); + btrfs_set_file_extent_type(leaf, fi, type); + btrfs_set_file_extent_disk_bytenr(leaf, fi, disk_bytenr); + btrfs_set_file_extent_disk_num_bytes(leaf, fi, disk_len); + btrfs_set_file_extent_offset(leaf, fi, offset); + btrfs_set_file_extent_num_bytes(leaf, fi, len); + btrfs_set_file_extent_ram_bytes(leaf, fi, ram_bytes); + btrfs_set_file_extent_compression(leaf, fi, compression); + btrfs_set_file_extent_encryption(leaf, fi, 0); + btrfs_set_file_extent_other_encoding(leaf, fi, 0); +} + +static void insert_inode_item_key(struct btrfs_root *root) +{ + struct btrfs_path path; + struct extent_buffer *leaf = root->node; + struct btrfs_key key; + u32 value_len = 0; + + memset(&path, 0, sizeof(path)); + + path.nodes[0] = leaf; + path.slots[0] = 0; + + key.objectid = BTRFS_INODE_ITEM_KEY; + key.type = BTRFS_INODE_ITEM_KEY; + key.offset = 0; + + /* + * 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); +} + +/* + * Build the most complicated map of extents the earth has ever seen. We want + * this so we can test all of the corner cases of btrfs_get_extent. Here is a + * diagram of how the extents will look though this may not be possible we still + * want to make sure everything acts normally (the last number is not inclusive) + * + * The numbers are using 4K fs block size as an example, the real test will scale + * all the extent maps (except the inlined one) according to the block size. + * + * [ 0 - 6 ][ 6 - 4K ][ 4K - 8K ][ 8K - 12K ] + * [ inline ][ implied hole ][ regular ][ regular1 split ] + * + * [ 12K - 16K ][ 16K - 24K ][ 24K - 28K ][ 28K - 32K ][ 32K - 36K ] + * [ hole ][ regular1 split ][ prealloc ][ prealloc1 ][ prealloc1 written ] + * + * [ 36K - 44K ][ 44K - 52K ][ 52K - 56K ][ 56K - 60K ][ 60K - 68 K ] + * [ prealloc1 ][ compressed ][ compressed1 ][ regular ][ compressed1 ] + * + * [ 68K - 72K ][ 72K - 84K ][ 84K - 88K ] + * [ regular ][ hole but no extent ][ regular ] + */ +static void setup_file_extents(struct btrfs_root *root, u32 sectorsize) +{ + int slot = 0; + u64 disk_bytenr = SZ_1M; + u64 offset = 0; + + /* + * Start 0, length 6, inlined. + * + * Tree-checker has strict limits on inline extents that they can only + * exist at file offset 0, thus we can only have one inline file extent + * at most. + */ + insert_extent(root, offset, 6, 6, 0, 0, 0, BTRFS_FILE_EXTENT_INLINE, 0, + slot); + slot++; + offset = sectorsize; + + /* Start 1 * blocksize, length 1 * blocksize, regular. */ + insert_extent(root, offset, sectorsize, sectorsize, 0, + disk_bytenr, sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot); + slot++; + + /* We don't want the regular em merged with the next one. */ + disk_bytenr += 2 * sectorsize; + offset += sectorsize; + + /* + * Start 2 * blocksize, length 1 * blocksize, regular. + * + * Now for 3 extents that were split from a hole punch so we test + * offsets properly. + */ + insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr, + 4 * sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot); + slot++; + offset += sectorsize; + + /* Start 3 * blocksize, length 1 * blocksize, regular, explicit hole. */ + insert_extent(root, offset, sectorsize, sectorsize, 0, 0, 0, + BTRFS_FILE_EXTENT_REG, 0, slot); + slot++; + offset += sectorsize; + + /* Start 4 * blocksize, length 2 * blocksize, regular. */ + insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize, + 2 * sectorsize, disk_bytenr, 4 * sectorsize, + BTRFS_FILE_EXTENT_REG, 0, slot); + slot++; + offset += 2 * sectorsize; + disk_bytenr += 4 * sectorsize; + + /* Start 6 * blocksize, length 1 * blocksize, preallocated. */ + insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr, + sectorsize, BTRFS_FILE_EXTENT_PREALLOC, 0, slot); + slot++; + offset += sectorsize; + + /* + * We want to jack up disk_bytenr a little more so the em stuff doesn't + * merge our records. + */ + disk_bytenr += 2 * sectorsize; + + /* + * Start 7 * blocksize, length 1 * blocksize, prealloc. + * + * Now for a partially written prealloc extent, basically the same as + * the hole punch example above. Ram_bytes never changes when you mark + * extents written btw. + */ + insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr, + 4 * sectorsize, BTRFS_FILE_EXTENT_PREALLOC, 0, slot); + slot++; + offset += sectorsize; + + /* Start 8 * blocksize, length 1 * blocksize, regular. */ + insert_extent(root, offset, sectorsize, 4 * sectorsize, sectorsize, + disk_bytenr, 4 * sectorsize, BTRFS_FILE_EXTENT_REG, 0, + slot); + slot++; + offset += sectorsize; + + /* Start 9 * blocksize, length 2 * blocksize, prealloc. */ + insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize, + 2 * sectorsize, disk_bytenr, 4 * sectorsize, + BTRFS_FILE_EXTENT_PREALLOC, 0, slot); + slot++; + offset += 2 * sectorsize; + disk_bytenr += 4 * sectorsize; + + /* Start 11 * blocksize, length 2 * blocksize, regular. */ + insert_extent(root, offset, 2 * sectorsize, 2 * sectorsize, 0, + disk_bytenr, sectorsize, BTRFS_FILE_EXTENT_REG, + BTRFS_COMPRESS_ZLIB, slot); + slot++; + offset += 2 * sectorsize; + /* No merges */ + disk_bytenr += 2 * sectorsize; + + /* Start 13 * blocksize, length 1 * blocksize, regular. */ + insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr, + sectorsize, BTRFS_FILE_EXTENT_REG, + BTRFS_COMPRESS_ZLIB, slot); + slot++; + offset += sectorsize; + + /* Start 14 * blocksize, length 1 * blocksize, regular. */ + insert_extent(root, offset, sectorsize, sectorsize, 0, + disk_bytenr + sectorsize, sectorsize, + BTRFS_FILE_EXTENT_REG, 0, slot); + slot++; + offset += sectorsize; + + /* Start 15 * blocksize, length 2 * blocksize, regular. */ + insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize, + 2 * sectorsize, disk_bytenr, sectorsize, + BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot); + slot++; + offset += 2 * sectorsize; + disk_bytenr += 2 * sectorsize; + + /* Start 17 * blocksize, length 1 * blocksize, regular. */ + insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr, + sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot); + slot++; + offset += 4 * sectorsize; + disk_bytenr += sectorsize; + + /* + * Start 18 * blocksize, length 3 * blocksize, implied hole (aka no + * file extent item). + * + * Start 21 * blocksize, length 1 * blocksize, regular. + */ + insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr, + sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot); +} + +static u32 prealloc_only = 0; +static u32 compressed_only = 0; +static u32 vacancy_only = 0; + +static noinline int test_btrfs_get_extent(u32 sectorsize, u32 nodesize) +{ + struct btrfs_fs_info *fs_info = NULL; + struct inode *inode = NULL; + struct btrfs_root *root = NULL; + struct extent_map *em = NULL; + u64 orig_start; + u64 disk_bytenr; + u64 offset; + int ret = -ENOMEM; + + test_msg("running btrfs_get_extent tests"); + + inode = btrfs_new_test_inode(); + if (!inode) { + test_std_err(TEST_ALLOC_INODE); + return ret; + } + + fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize); + if (!fs_info) { + test_std_err(TEST_ALLOC_FS_INFO); + goto out; + } + + root = btrfs_alloc_dummy_root(fs_info); + if (IS_ERR(root)) { + test_std_err(TEST_ALLOC_ROOT); + goto out; + } + + root->node = alloc_dummy_extent_buffer(fs_info, nodesize); + if (!root->node) { + test_std_err(TEST_ALLOC_ROOT); + goto out; + } + + btrfs_set_header_nritems(root->node, 0); + btrfs_set_header_level(root->node, 0); + ret = -EINVAL; + + /* First with no extents */ + BTRFS_I(inode)->root = root; + em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, sectorsize); + if (IS_ERR(em)) { + em = NULL; + test_err("got an error when we shouldn't have"); + goto out; + } + if (em->disk_bytenr != EXTENT_MAP_HOLE) { + test_err("expected a hole, got %llu", em->disk_bytenr); + goto out; + } + btrfs_free_extent_map(em); + btrfs_drop_extent_map_range(BTRFS_I(inode), 0, (u64)-1, false); + + /* + * All of the magic numbers are based on the mapping setup in + * setup_file_extents, so if you change anything there you need to + * update the comment and update the expected values below. + */ + setup_file_extents(root, sectorsize); + + em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, (u64)-1); + if (IS_ERR(em)) { + test_err("got an error when we shouldn't have"); + goto out; + } + if (em->disk_bytenr != EXTENT_MAP_INLINE) { + test_err("expected an inline, got %llu", em->disk_bytenr); + goto out; + } + + /* + * For inline extent, we always round up the em to sectorsize, as + * they are either: + * + * a) a hidden hole + * The range will be zeroed at inline extent read time. + * + * b) a file extent with unaligned bytenr + * Tree checker will reject it. + */ + if (em->start != 0 || em->len != sectorsize) { + test_err( + "unexpected extent wanted start 0 len %u, got start %llu len %llu", + sectorsize, em->start, em->len); + goto out; + } + if (em->flags != 0) { + test_err("unexpected flags set, want 0 have %u", em->flags); + goto out; + } + /* + * We don't test anything else for inline since it doesn't get set + * unless we have a page for it to write into. Maybe we should change + * this? + */ + offset = btrfs_extent_map_end(em); + btrfs_free_extent_map(em); + + /* Regular extent */ + em = btrfs_get_extent(BTRFS_I(inode), NULL, offset, sectorsize); + if (IS_ERR(em)) { + test_err("got an error when we shouldn't have"); + goto out; + } + if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) { + test_err("expected a real extent, got %llu", em->disk_bytenr); + goto out; + } + if (em->start != offset || em->len != sectorsize) { + test_err( + "unexpected extent wanted start %llu len %u, got start %llu len %llu", + offset, sectorsize, em->start, em->len); + goto out; + } + if (em->flags != 0) { + test_err("unexpected flags set, want 0 have %u", em->flags); + goto out; + } + if (em->offset != 0) { + test_err("wrong offset, want 0, have %llu", em->offset); + goto out; + } + offset = btrfs_extent_map_end(em); + btrfs_free_extent_map(em); + + /* The next 3 are split extents */ + em = btrfs_get_extent(BTRFS_I(inode), NULL, offset, sectorsize); + if (IS_ERR(em)) { + test_err("got an error when we shouldn't have"); + goto out; + } + if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) { + test_err("expected a real extent, got %llu", em->disk_bytenr); + goto out; + } + if (em->start != offset || em->len != sectorsize) { + test_err( + "unexpected extent start %llu len %u, got start %llu len %llu", + offset, sectorsize, em->start, em->len); + goto out; + } + if (em->flags != 0) { + test_err("unexpected flags set, want 0 have %u", em->flags); + goto out; + } + if (em->offset != 0) { + test_err("wrong offset, want 0, have %llu", em->offset); + goto out; + } + disk_bytenr = btrfs_extent_map_block_start(em); + orig_start = em->start; + offset = btrfs_extent_map_end(em); + btrfs_free_extent_map(em); + + em = btrfs_get_extent(BTRFS_I(inode), NULL, offset, sectorsize); + if (IS_ERR(em)) { + test_err("got an error when we shouldn't have"); + goto out; + } + if (em->disk_bytenr != EXTENT_MAP_HOLE) { + test_err("expected a hole, got %llu", em->disk_bytenr); + goto out; + } + if (em->start != offset || em->len != sectorsize) { + test_err( + "unexpected extent wanted start %llu len %u, got start %llu len %llu", + offset, sectorsize, em->start, em->len); + goto out; + } + if (em->flags != 0) { + test_err("unexpected flags set, want 0 have %u", em->flags); + goto out; + } + offset = btrfs_extent_map_end(em); + btrfs_free_extent_map(em); + + em = btrfs_get_extent(BTRFS_I(inode), NULL, offset, sectorsize); + if (IS_ERR(em)) { + test_err("got an error when we shouldn't have"); + goto out; + } + if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) { + test_err("expected a real extent, got %llu", em->disk_bytenr); + goto out; + } + if (em->start != offset || em->len != 2 * sectorsize) { + test_err( + "unexpected extent wanted start %llu len %u, got start %llu len %llu", + offset, 2 * sectorsize, em->start, em->len); + goto out; + } + if (em->flags != 0) { + test_err("unexpected flags set, want 0 have %u", em->flags); + goto out; + } + if (em->start - em->offset != orig_start) { + test_err("wrong offset, em->start=%llu em->offset=%llu orig_start=%llu", + em->start, em->offset, orig_start); + goto out; + } + disk_bytenr += (em->start - orig_start); + if (btrfs_extent_map_block_start(em) != disk_bytenr) { + test_err("wrong block start, want %llu, have %llu", + disk_bytenr, btrfs_extent_map_block_start(em)); + goto out; + } + offset = btrfs_extent_map_end(em); + btrfs_free_extent_map(em); + + /* Prealloc extent */ + em = btrfs_get_extent(BTRFS_I(inode), NULL, offset, sectorsize); + if (IS_ERR(em)) { + test_err("got an error when we shouldn't have"); + goto out; + } + if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) { + test_err("expected a real extent, got %llu", em->disk_bytenr); + goto out; + } + if (em->start != offset || em->len != sectorsize) { + test_err( + "unexpected extent wanted start %llu len %u, got start %llu len %llu", + offset, sectorsize, em->start, em->len); + goto out; + } + if (em->flags != prealloc_only) { + test_err("unexpected flags set, want %u have %u", + prealloc_only, em->flags); + goto out; + } + if (em->offset != 0) { + test_err("wrong offset, want 0, have %llu", em->offset); + goto out; + } + offset = btrfs_extent_map_end(em); + btrfs_free_extent_map(em); + + /* The next 3 are a half written prealloc extent */ + em = btrfs_get_extent(BTRFS_I(inode), NULL, offset, sectorsize); + if (IS_ERR(em)) { + test_err("got an error when we shouldn't have"); + goto out; + } + if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) { + test_err("expected a real extent, got %llu", em->disk_bytenr); + goto out; + } + if (em->start != offset || em->len != sectorsize) { + test_err( + "unexpected extent wanted start %llu len %u, got start %llu len %llu", + offset, sectorsize, em->start, em->len); + goto out; + } + if (em->flags != prealloc_only) { + test_err("unexpected flags set, want %u have %u", + prealloc_only, em->flags); + goto out; + } + if (em->offset != 0) { + test_err("wrong offset, want 0, have %llu", em->offset); + goto out; + } + disk_bytenr = btrfs_extent_map_block_start(em); + orig_start = em->start; + offset = btrfs_extent_map_end(em); + btrfs_free_extent_map(em); + + em = btrfs_get_extent(BTRFS_I(inode), NULL, offset, sectorsize); + if (IS_ERR(em)) { + test_err("got an error when we shouldn't have"); + goto out; + } + if (em->disk_bytenr >= EXTENT_MAP_HOLE) { + test_err("expected a real extent, got %llu", em->disk_bytenr); + goto out; + } + if (em->start != offset || em->len != sectorsize) { + test_err( + "unexpected extent wanted start %llu len %u, got start %llu len %llu", + offset, sectorsize, em->start, em->len); + goto out; + } + if (em->flags != 0) { + test_err("unexpected flags set, want 0 have %u", em->flags); + goto out; + } + if (em->start - em->offset != orig_start) { + test_err("unexpected offset, wanted %llu, have %llu", + em->start - orig_start, em->offset); + goto out; + } + if (btrfs_extent_map_block_start(em) != disk_bytenr + em->offset) { + test_err("unexpected block start, wanted %llu, have %llu", + disk_bytenr + em->offset, btrfs_extent_map_block_start(em)); + goto out; + } + offset = btrfs_extent_map_end(em); + btrfs_free_extent_map(em); + + em = btrfs_get_extent(BTRFS_I(inode), NULL, offset, sectorsize); + if (IS_ERR(em)) { + test_err("got an error when we shouldn't have"); + goto out; + } + if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) { + test_err("expected a real extent, got %llu", em->disk_bytenr); + goto out; + } + if (em->start != offset || em->len != 2 * sectorsize) { + test_err( + "unexpected extent wanted start %llu len %u, got start %llu len %llu", + offset, 2 * sectorsize, em->start, em->len); + goto out; + } + if (em->flags != prealloc_only) { + test_err("unexpected flags set, want %u have %u", + prealloc_only, em->flags); + goto out; + } + if (em->start - em->offset != orig_start) { + test_err("wrong offset, em->start=%llu em->offset=%llu orig_start=%llu", + em->start, em->offset, orig_start); + goto out; + } + if (btrfs_extent_map_block_start(em) != disk_bytenr + em->offset) { + test_err("unexpected block start, wanted %llu, have %llu", + disk_bytenr + em->offset, btrfs_extent_map_block_start(em)); + goto out; + } + offset = btrfs_extent_map_end(em); + btrfs_free_extent_map(em); + + /* Now for the compressed extent */ + em = btrfs_get_extent(BTRFS_I(inode), NULL, offset, sectorsize); + if (IS_ERR(em)) { + test_err("got an error when we shouldn't have"); + goto out; + } + if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) { + test_err("expected a real extent, got %llu", em->disk_bytenr); + goto out; + } + if (em->start != offset || em->len != 2 * sectorsize) { + test_err( + "unexpected extent wanted start %llu len %u, got start %llu len %llu", + offset, 2 * sectorsize, em->start, em->len); + goto out; + } + if (em->flags != compressed_only) { + test_err("unexpected flags set, want %u have %u", + compressed_only, em->flags); + goto out; + } + if (em->offset != 0) { + test_err("wrong offset, want 0, have %llu", em->offset); + goto out; + } + if (btrfs_extent_map_compression(em) != BTRFS_COMPRESS_ZLIB) { + test_err("unexpected compress type, wanted %d, got %d", + BTRFS_COMPRESS_ZLIB, btrfs_extent_map_compression(em)); + goto out; + } + offset = btrfs_extent_map_end(em); + btrfs_free_extent_map(em); + + /* Split compressed extent */ + em = btrfs_get_extent(BTRFS_I(inode), NULL, offset, sectorsize); + if (IS_ERR(em)) { + test_err("got an error when we shouldn't have"); + goto out; + } + if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) { + test_err("expected a real extent, got %llu", em->disk_bytenr); + goto out; + } + if (em->start != offset || em->len != sectorsize) { + test_err( + "unexpected extent wanted start %llu len %u, got start %llu len %llu", + offset, sectorsize, em->start, em->len); + goto out; + } + if (em->flags != compressed_only) { + test_err("unexpected flags set, want %u have %u", + compressed_only, em->flags); + goto out; + } + if (em->offset != 0) { + test_err("wrong offset, want 0, have %llu", em->offset); + goto out; + } + if (btrfs_extent_map_compression(em) != BTRFS_COMPRESS_ZLIB) { + test_err("unexpected compress type, wanted %d, got %d", + BTRFS_COMPRESS_ZLIB, btrfs_extent_map_compression(em)); + goto out; + } + disk_bytenr = btrfs_extent_map_block_start(em); + orig_start = em->start; + offset = btrfs_extent_map_end(em); + btrfs_free_extent_map(em); + + em = btrfs_get_extent(BTRFS_I(inode), NULL, offset, sectorsize); + if (IS_ERR(em)) { + test_err("got an error when we shouldn't have"); + goto out; + } + if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) { + test_err("expected a real extent, got %llu", em->disk_bytenr); + goto out; + } + if (em->start != offset || em->len != sectorsize) { + test_err( + "unexpected extent wanted start %llu len %u, got start %llu len %llu", + offset, sectorsize, em->start, em->len); + goto out; + } + if (em->flags != 0) { + test_err("unexpected flags set, want 0 have %u", em->flags); + goto out; + } + if (em->offset != 0) { + test_err("wrong offset, want 0, have %llu", em->offset); + goto out; + } + offset = btrfs_extent_map_end(em); + btrfs_free_extent_map(em); + + em = btrfs_get_extent(BTRFS_I(inode), NULL, offset, sectorsize); + if (IS_ERR(em)) { + test_err("got an error when we shouldn't have"); + goto out; + } + if (btrfs_extent_map_block_start(em) != disk_bytenr) { + test_err("block start does not match, want %llu got %llu", + disk_bytenr, btrfs_extent_map_block_start(em)); + goto out; + } + if (em->start != offset || em->len != 2 * sectorsize) { + test_err( + "unexpected extent wanted start %llu len %u, got start %llu len %llu", + offset, 2 * sectorsize, em->start, em->len); + goto out; + } + if (em->flags != compressed_only) { + test_err("unexpected flags set, want %u have %u", + compressed_only, em->flags); + goto out; + } + if (em->start - em->offset != orig_start) { + test_err("wrong offset, em->start=%llu em->offset=%llu orig_start=%llu", + em->start, em->offset, orig_start); + goto out; + } + if (btrfs_extent_map_compression(em) != BTRFS_COMPRESS_ZLIB) { + test_err("unexpected compress type, wanted %d, got %d", + BTRFS_COMPRESS_ZLIB, btrfs_extent_map_compression(em)); + goto out; + } + offset = btrfs_extent_map_end(em); + btrfs_free_extent_map(em); + + /* A hole between regular extents but no hole extent */ + em = btrfs_get_extent(BTRFS_I(inode), NULL, offset + 6, sectorsize); + if (IS_ERR(em)) { + test_err("got an error when we shouldn't have"); + goto out; + } + if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) { + test_err("expected a real extent, got %llu", em->disk_bytenr); + goto out; + } + if (em->start != offset || em->len != sectorsize) { + test_err( + "unexpected extent wanted start %llu len %u, got start %llu len %llu", + offset, sectorsize, em->start, em->len); + goto out; + } + if (em->flags != 0) { + test_err("unexpected flags set, want 0 have %u", em->flags); + goto out; + } + if (em->offset != 0) { + test_err("wrong offset, want 0, have %llu", em->offset); + goto out; + } + offset = btrfs_extent_map_end(em); + btrfs_free_extent_map(em); + + em = btrfs_get_extent(BTRFS_I(inode), NULL, offset, SZ_4M); + if (IS_ERR(em)) { + test_err("got an error when we shouldn't have"); + goto out; + } + if (em->disk_bytenr != EXTENT_MAP_HOLE) { + test_err("expected a hole extent, got %llu", em->disk_bytenr); + goto out; + } + /* + * Currently we just return a length that we requested rather than the + * length of the actual hole, if this changes we'll have to change this + * test. + */ + if (em->start != offset || em->len != 3 * sectorsize) { + test_err( + "unexpected extent wanted start %llu len %u, got start %llu len %llu", + offset, 3 * sectorsize, em->start, em->len); + goto out; + } + if (em->flags != vacancy_only) { + test_err("unexpected flags set, want %u have %u", + vacancy_only, em->flags); + goto out; + } + if (em->offset != 0) { + test_err("wrong offset, want 0, have %llu", em->offset); + goto out; + } + offset = btrfs_extent_map_end(em); + btrfs_free_extent_map(em); + + em = btrfs_get_extent(BTRFS_I(inode), NULL, offset, sectorsize); + if (IS_ERR(em)) { + test_err("got an error when we shouldn't have"); + goto out; + } + if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) { + test_err("expected a real extent, got %llu", em->disk_bytenr); + goto out; + } + if (em->start != offset || em->len != sectorsize) { + test_err( + "unexpected extent wanted start %llu len %u, got start %llu len %llu", + offset, sectorsize, em->start, em->len); + goto out; + } + if (em->flags != 0) { + test_err("unexpected flags set, want 0 have %u", em->flags); + goto out; + } + if (em->offset != 0) { + test_err("wrong orig offset, want 0, have %llu", em->offset); + goto out; + } + ret = 0; +out: + if (!IS_ERR(em)) + btrfs_free_extent_map(em); + iput(inode); + btrfs_free_dummy_root(root); + btrfs_free_dummy_fs_info(fs_info); + return ret; +} + +static int test_hole_first(u32 sectorsize, u32 nodesize) +{ + struct btrfs_fs_info *fs_info = NULL; + struct inode *inode = NULL; + struct btrfs_root *root = NULL; + struct extent_map *em = NULL; + int ret = -ENOMEM; + + test_msg("running hole first btrfs_get_extent test"); + + inode = btrfs_new_test_inode(); + if (!inode) { + test_std_err(TEST_ALLOC_INODE); + return ret; + } + + fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize); + if (!fs_info) { + test_std_err(TEST_ALLOC_FS_INFO); + goto out; + } + + root = btrfs_alloc_dummy_root(fs_info); + if (IS_ERR(root)) { + test_std_err(TEST_ALLOC_ROOT); + goto out; + } + + root->node = alloc_dummy_extent_buffer(fs_info, nodesize); + if (!root->node) { + test_std_err(TEST_ALLOC_ROOT); + goto out; + } + + btrfs_set_header_nritems(root->node, 0); + btrfs_set_header_level(root->node, 0); + BTRFS_I(inode)->root = root; + ret = -EINVAL; + + /* + * Need a blank inode item here just so we don't confuse + * btrfs_get_extent. + */ + insert_inode_item_key(root); + insert_extent(root, sectorsize, sectorsize, sectorsize, 0, sectorsize, + sectorsize, BTRFS_FILE_EXTENT_REG, 0, 1); + em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, 2 * sectorsize); + if (IS_ERR(em)) { + test_err("got an error when we shouldn't have"); + goto out; + } + if (em->disk_bytenr != EXTENT_MAP_HOLE) { + test_err("expected a hole, got %llu", em->disk_bytenr); + goto out; + } + if (em->start != 0 || em->len != sectorsize) { + test_err( + "unexpected extent wanted start 0 len %u, got start %llu len %llu", + sectorsize, em->start, em->len); + goto out; + } + if (em->flags != vacancy_only) { + test_err("wrong flags, wanted %u, have %u", vacancy_only, + em->flags); + goto out; + } + btrfs_free_extent_map(em); + + em = btrfs_get_extent(BTRFS_I(inode), NULL, sectorsize, 2 * sectorsize); + if (IS_ERR(em)) { + test_err("got an error when we shouldn't have"); + goto out; + } + if (btrfs_extent_map_block_start(em) != sectorsize) { + test_err("expected a real extent, got %llu", + btrfs_extent_map_block_start(em)); + goto out; + } + if (em->start != sectorsize || em->len != sectorsize) { + test_err( + "unexpected extent wanted start %u len %u, got start %llu len %llu", + sectorsize, sectorsize, em->start, em->len); + goto out; + } + if (em->flags != 0) { + test_err("unexpected flags set, wanted 0 got %u", + em->flags); + goto out; + } + ret = 0; +out: + if (!IS_ERR(em)) + btrfs_free_extent_map(em); + iput(inode); + btrfs_free_dummy_root(root); + btrfs_free_dummy_fs_info(fs_info); + return ret; +} + +static int test_extent_accounting(u32 sectorsize, u32 nodesize) +{ + struct btrfs_fs_info *fs_info = NULL; + struct inode *inode = NULL; + struct btrfs_root *root = NULL; + int ret = -ENOMEM; + + test_msg("running outstanding_extents tests"); + + inode = btrfs_new_test_inode(); + if (!inode) { + test_std_err(TEST_ALLOC_INODE); + return ret; + } + + fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize); + if (!fs_info) { + test_std_err(TEST_ALLOC_FS_INFO); + goto out; + } + + root = btrfs_alloc_dummy_root(fs_info); + if (IS_ERR(root)) { + test_std_err(TEST_ALLOC_ROOT); + goto out; + } + + BTRFS_I(inode)->root = root; + + /* [BTRFS_MAX_EXTENT_SIZE] */ + ret = btrfs_set_extent_delalloc(BTRFS_I(inode), 0, + BTRFS_MAX_EXTENT_SIZE - 1, 0, NULL); + if (ret) { + test_err("btrfs_set_extent_delalloc returned %d", ret); + goto out; + } + if (BTRFS_I(inode)->outstanding_extents != 1) { + ret = -EINVAL; + test_err("miscount, wanted 1, got %u", + BTRFS_I(inode)->outstanding_extents); + goto out; + } + + /* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */ + ret = btrfs_set_extent_delalloc(BTRFS_I(inode), BTRFS_MAX_EXTENT_SIZE, + BTRFS_MAX_EXTENT_SIZE + sectorsize - 1, + 0, NULL); + if (ret) { + test_err("btrfs_set_extent_delalloc returned %d", ret); + goto out; + } + if (BTRFS_I(inode)->outstanding_extents != 2) { + ret = -EINVAL; + test_err("miscount, wanted 2, got %u", + BTRFS_I(inode)->outstanding_extents); + goto out; + } + + /* [BTRFS_MAX_EXTENT_SIZE/2][sectorsize HOLE][the rest] */ + ret = btrfs_clear_extent_bit(&BTRFS_I(inode)->io_tree, + BTRFS_MAX_EXTENT_SIZE >> 1, + (BTRFS_MAX_EXTENT_SIZE >> 1) + sectorsize - 1, + EXTENT_DELALLOC | EXTENT_DELALLOC_NEW, NULL); + if (ret) { + test_err("clear_extent_bit returned %d", ret); + goto out; + } + if (BTRFS_I(inode)->outstanding_extents != 2) { + ret = -EINVAL; + test_err("miscount, wanted 2, got %u", + BTRFS_I(inode)->outstanding_extents); + goto out; + } + + /* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */ + ret = btrfs_set_extent_delalloc(BTRFS_I(inode), BTRFS_MAX_EXTENT_SIZE >> 1, + (BTRFS_MAX_EXTENT_SIZE >> 1) + + sectorsize - 1, + 0, NULL); + if (ret) { + test_err("btrfs_set_extent_delalloc returned %d", ret); + goto out; + } + if (BTRFS_I(inode)->outstanding_extents != 2) { + ret = -EINVAL; + test_err("miscount, wanted 2, got %u", + BTRFS_I(inode)->outstanding_extents); + goto out; + } + + /* + * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize HOLE][BTRFS_MAX_EXTENT_SIZE+sectorsize] + */ + ret = btrfs_set_extent_delalloc(BTRFS_I(inode), + BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize, + (BTRFS_MAX_EXTENT_SIZE << 1) + 3 * sectorsize - 1, + 0, NULL); + if (ret) { + test_err("btrfs_set_extent_delalloc returned %d", ret); + goto out; + } + if (BTRFS_I(inode)->outstanding_extents != 4) { + ret = -EINVAL; + test_err("miscount, wanted 4, got %u", + BTRFS_I(inode)->outstanding_extents); + goto out; + } + + /* + * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize][BTRFS_MAX_EXTENT_SIZE+sectorsize] + */ + ret = btrfs_set_extent_delalloc(BTRFS_I(inode), + BTRFS_MAX_EXTENT_SIZE + sectorsize, + BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, 0, NULL); + if (ret) { + test_err("btrfs_set_extent_delalloc returned %d", ret); + goto out; + } + if (BTRFS_I(inode)->outstanding_extents != 3) { + ret = -EINVAL; + test_err("miscount, wanted 3, got %u", + BTRFS_I(inode)->outstanding_extents); + goto out; + } + + /* [BTRFS_MAX_EXTENT_SIZE+4k][4K HOLE][BTRFS_MAX_EXTENT_SIZE+4k] */ + ret = btrfs_clear_extent_bit(&BTRFS_I(inode)->io_tree, + BTRFS_MAX_EXTENT_SIZE + sectorsize, + BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, + EXTENT_DELALLOC | EXTENT_DELALLOC_NEW, NULL); + if (ret) { + test_err("clear_extent_bit returned %d", ret); + goto out; + } + if (BTRFS_I(inode)->outstanding_extents != 4) { + ret = -EINVAL; + test_err("miscount, wanted 4, got %u", + BTRFS_I(inode)->outstanding_extents); + goto out; + } + + /* + * Refill the hole again just for good measure, because I thought it + * might fail and I'd rather satisfy my paranoia at this point. + */ + ret = btrfs_set_extent_delalloc(BTRFS_I(inode), + BTRFS_MAX_EXTENT_SIZE + sectorsize, + BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, 0, NULL); + if (ret) { + test_err("btrfs_set_extent_delalloc returned %d", ret); + goto out; + } + if (BTRFS_I(inode)->outstanding_extents != 3) { + ret = -EINVAL; + test_err("miscount, wanted 3, got %u", + BTRFS_I(inode)->outstanding_extents); + goto out; + } + + /* Empty */ + ret = btrfs_clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1, + EXTENT_DELALLOC | EXTENT_DELALLOC_NEW, NULL); + if (ret) { + test_err("clear_extent_bit returned %d", ret); + goto out; + } + if (BTRFS_I(inode)->outstanding_extents) { + ret = -EINVAL; + test_err("miscount, wanted 0, got %u", + BTRFS_I(inode)->outstanding_extents); + goto out; + } + ret = 0; +out: + if (ret) + btrfs_clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1, + EXTENT_DELALLOC | EXTENT_DELALLOC_NEW, NULL); + iput(inode); + btrfs_free_dummy_root(root); + btrfs_free_dummy_fs_info(fs_info); + return ret; +} + +int btrfs_test_inodes(u32 sectorsize, u32 nodesize) +{ + int ret; + + test_msg("running inode tests"); + + compressed_only |= EXTENT_FLAG_COMPRESS_ZLIB; + prealloc_only |= EXTENT_FLAG_PREALLOC; + + ret = test_btrfs_get_extent(sectorsize, nodesize); + if (ret) + return ret; + ret = test_hole_first(sectorsize, nodesize); + if (ret) + return ret; + return test_extent_accounting(sectorsize, nodesize); +} -- cgit v1.3.1