From: Michael Jeanson Date: Wed, 20 Sep 2017 16:12:41 +0000 (-0400) Subject: Fix: update btrfs instrumentation for kernel 4.14 X-Git-Tag: v2.9.4~2 X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=68dd392faf4b6617092953d50b36c8cdd05b4968;p=lttng-modules.git Fix: update btrfs instrumentation for kernel 4.14 See upstream commit: Author: Jeff Mahoney Date: Wed Jun 28 21:56:54 2017 -0600 btrfs: constify tracepoint arguments Tracepoint arguments are all read-only. If we mark the arguments as const, we're able to keep or convert those arguments to const where appropriate. Signed-off-by: Michael Jeanson Signed-off-by: Mathieu Desnoyers --- diff --git a/instrumentation/events/lttng-module/btrfs.h b/instrumentation/events/lttng-module/btrfs.h index 72777bc1..48b7cae3 100644 --- a/instrumentation/events/lttng-module/btrfs.h +++ b/instrumentation/events/lttng-module/btrfs.h @@ -32,6 +32,58 @@ struct extent_state; #define BTRFS_UUID_SIZE 16 +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,14,0)) +LTTNG_TRACEPOINT_EVENT(btrfs_transaction_commit, + + TP_PROTO(const struct btrfs_root *root), + + TP_ARGS(root), + + TP_FIELDS( + ctf_integer(u64, generation, root->fs_info->generation) + ctf_integer(u64, root_objectid, root->root_key.objectid) + ) +) + +LTTNG_TRACEPOINT_EVENT_CLASS(btrfs__inode, + + TP_PROTO(const struct inode *inode), + + TP_ARGS(inode), + + TP_FIELDS( + ctf_integer(ino_t, ino, inode->i_ino) + ctf_integer(blkcnt_t, blocks, inode->i_blocks) + ctf_integer(u64, disk_i_size, BTRFS_I(inode)->disk_i_size) + ctf_integer(u64, generation, BTRFS_I(inode)->generation) + ctf_integer(u64, last_trans, BTRFS_I(inode)->last_trans) + ctf_integer(u64, logged_trans, BTRFS_I(inode)->logged_trans) + ctf_integer(u64, root_objectid, + BTRFS_I(inode)->root->root_key.objectid) + ) +) + +LTTNG_TRACEPOINT_EVENT_INSTANCE(btrfs__inode, btrfs_inode_new, + + TP_PROTO(const struct inode *inode), + + TP_ARGS(inode) +) + +LTTNG_TRACEPOINT_EVENT_INSTANCE(btrfs__inode, btrfs_inode_request, + + TP_PROTO(const struct inode *inode), + + TP_ARGS(inode) +) + +LTTNG_TRACEPOINT_EVENT_INSTANCE(btrfs__inode, btrfs_inode_evict, + + TP_PROTO(const struct inode *inode), + + TP_ARGS(inode) +) +#else LTTNG_TRACEPOINT_EVENT(btrfs_transaction_commit, TP_PROTO(struct btrfs_root *root), @@ -82,8 +134,32 @@ LTTNG_TRACEPOINT_EVENT_INSTANCE(btrfs__inode, btrfs_inode_evict, TP_ARGS(inode) ) +#endif + +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,14,0)) + +LTTNG_TRACEPOINT_EVENT(btrfs_get_extent, + + TP_PROTO(const struct btrfs_root *root, const struct btrfs_inode *inode, + const struct extent_map *map), + + TP_ARGS(root, inode, map), + + TP_FIELDS( + ctf_integer(u64, root_objectid, root->root_key.objectid) + ctf_integer(u64, ino, btrfs_ino(inode)) + ctf_integer(u64, start, map->start) + ctf_integer(u64, len, map->len) + ctf_integer(u64, orig_start, map->orig_start) + ctf_integer(u64, block_start, map->block_start) + ctf_integer(u64, block_len, map->block_len) + ctf_integer(unsigned long, flags, map->flags) + ctf_integer(int, refs, refcount_read(&map->refs)) + ctf_integer(unsigned int, compress_type, map->compress_type) + ) +) -#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,12,0)) +#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(4,12,0)) LTTNG_TRACEPOINT_EVENT(btrfs_get_extent, @@ -175,7 +251,29 @@ LTTNG_TRACEPOINT_EVENT(btrfs_get_extent, #endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) */ -#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,12,0)) +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,14,0)) +LTTNG_TRACEPOINT_EVENT_CLASS(btrfs__ordered_extent, + + TP_PROTO(const struct inode *inode, + const struct btrfs_ordered_extent *ordered), + + TP_ARGS(inode, ordered), + + TP_FIELDS( + ctf_integer(ino_t, ino, inode->i_ino) + ctf_integer(u64, file_offset, ordered->file_offset) + ctf_integer(u64, start, ordered->start) + ctf_integer(u64, len, ordered->len) + ctf_integer(u64, disk_len, ordered->disk_len) + ctf_integer(u64, bytes_left, ordered->bytes_left) + ctf_integer(unsigned long, flags, ordered->flags) + ctf_integer(int, compress_type, ordered->compress_type) + ctf_integer(int, refs, refcount_read(&ordered->refs)) + ctf_integer(u64, root_objectid, + BTRFS_I(inode)->root->root_key.objectid) + ) +) +#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(4,12,0)) LTTNG_TRACEPOINT_EVENT_CLASS(btrfs__ordered_extent, TP_PROTO(struct inode *inode, struct btrfs_ordered_extent *ordered), @@ -219,6 +317,107 @@ LTTNG_TRACEPOINT_EVENT_CLASS(btrfs__ordered_extent, ) #endif +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,14,0)) +LTTNG_TRACEPOINT_EVENT_INSTANCE(btrfs__ordered_extent, btrfs_ordered_extent_add, + + TP_PROTO(const struct inode *inode, + const struct btrfs_ordered_extent *ordered), + + TP_ARGS(inode, ordered) +) + +LTTNG_TRACEPOINT_EVENT_INSTANCE(btrfs__ordered_extent, btrfs_ordered_extent_remove, + + TP_PROTO(const struct inode *inode, + const struct btrfs_ordered_extent *ordered), + + TP_ARGS(inode, ordered) +) + +LTTNG_TRACEPOINT_EVENT_INSTANCE(btrfs__ordered_extent, btrfs_ordered_extent_start, + + TP_PROTO(const struct inode *inode, + const struct btrfs_ordered_extent *ordered), + + TP_ARGS(inode, ordered) +) + +LTTNG_TRACEPOINT_EVENT_INSTANCE(btrfs__ordered_extent, btrfs_ordered_extent_put, + + TP_PROTO(const struct inode *inode, + const struct btrfs_ordered_extent *ordered), + + TP_ARGS(inode, ordered) +) + +LTTNG_TRACEPOINT_EVENT_CLASS(btrfs__writepage, + + TP_PROTO(const struct page *page, const struct inode *inode, + const struct writeback_control *wbc), + + TP_ARGS(page, inode, wbc), + + TP_FIELDS( + ctf_integer(ino_t, ino, inode->i_ino) + ctf_integer(pgoff_t, index, page->index) + ctf_integer(long, nr_to_write, wbc->nr_to_write) + ctf_integer(long, pages_skipped, wbc->pages_skipped) + ctf_integer(loff_t, range_start, wbc->range_start) + ctf_integer(loff_t, range_end, wbc->range_end) + ctf_integer(char, for_kupdate, wbc->for_kupdate) + ctf_integer(char, for_reclaim, wbc->for_reclaim) + ctf_integer(char, range_cyclic, wbc->range_cyclic) + ctf_integer(pgoff_t, writeback_index, + inode->i_mapping->writeback_index) + ctf_integer(u64, root_objectid, + BTRFS_I(inode)->root->root_key.objectid) + ) +) + +LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(btrfs__writepage, + + __extent_writepage, + + btrfs__extent_writepage, + + TP_PROTO(const struct page *page, const struct inode *inode, + const struct writeback_control *wbc), + + TP_ARGS(page, inode, wbc) +) + +LTTNG_TRACEPOINT_EVENT(btrfs_writepage_end_io_hook, + + TP_PROTO(const struct page *page, u64 start, u64 end, int uptodate), + + TP_ARGS(page, start, end, uptodate), + + TP_FIELDS( + ctf_integer(ino_t, ino, page->mapping->host->i_ino) + ctf_integer(pgoff_t, index, page->index) + ctf_integer(u64, start, start) + ctf_integer(u64, end, end) + ctf_integer(int, uptodate, uptodate) + ctf_integer(u64, root_objectid, + BTRFS_I(page->mapping->host)->root->root_key.objectid) + ) +) + +LTTNG_TRACEPOINT_EVENT(btrfs_sync_file, + + TP_PROTO(const struct file *file, int datasync), + + TP_ARGS(file, datasync), + + TP_FIELDS( + ctf_integer(ino_t, ino, file->f_path.dentry->d_inode->i_ino) + ctf_integer(ino_t, parent, file->f_path.dentry->d_parent->d_inode->i_ino) + ctf_integer(int, datasync, datasync) + ctf_integer(u64, root_objectid, + BTRFS_I(file->f_path.dentry->d_inode)->root->root_key.objectid) + ) +) +#else LTTNG_TRACEPOINT_EVENT_INSTANCE(btrfs__ordered_extent, btrfs_ordered_extent_add, TP_PROTO(struct inode *inode, struct btrfs_ordered_extent *ordered), @@ -317,8 +516,20 @@ LTTNG_TRACEPOINT_EVENT(btrfs_sync_file, BTRFS_I(file->f_path.dentry->d_inode)->root->root_key.objectid) ) ) +#endif -#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,8,0)) +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,14,0)) +LTTNG_TRACEPOINT_EVENT(btrfs_sync_fs, + + TP_PROTO(const struct btrfs_fs_info *fs_info, int wait), + + TP_ARGS(fs_info, wait), + + TP_FIELDS( + ctf_integer(int, wait, wait) + ) +) +#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(4,8,0)) LTTNG_TRACEPOINT_EVENT(btrfs_sync_fs, TP_PROTO(struct btrfs_fs_info *fs_info, int wait), @@ -342,6 +553,25 @@ LTTNG_TRACEPOINT_EVENT(btrfs_sync_fs, ) #endif +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,14,0)) +LTTNG_TRACEPOINT_EVENT(btrfs_add_block_group, + + TP_PROTO(const struct btrfs_fs_info *fs_info, + const struct btrfs_block_group_cache *block_group, int create), + + TP_ARGS(fs_info, block_group, create), + + TP_FIELDS( + ctf_array(u8, fsid, fs_info->fsid, BTRFS_UUID_SIZE) + ctf_integer(u64, offset, block_group->key.objectid) + ctf_integer(u64, size, block_group->key.offset) + ctf_integer(u64, flags, block_group->flags) + ctf_integer(u64, bytes_used, btrfs_block_group_used(&block_group->item)) + ctf_integer(u64, bytes_super, block_group->bytes_super) + ctf_integer(int, create, create) + ) +) +#else LTTNG_TRACEPOINT_EVENT(btrfs_add_block_group, TP_PROTO(struct btrfs_fs_info *fs_info, @@ -359,8 +589,30 @@ LTTNG_TRACEPOINT_EVENT(btrfs_add_block_group, ctf_integer(int, create, create) ) ) +#endif -#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,8,0)) +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,14,0)) +LTTNG_TRACEPOINT_EVENT(btrfs_delayed_tree_ref, + + TP_PROTO(const struct btrfs_fs_info *fs_info, + const struct btrfs_delayed_ref_node *ref, + const struct btrfs_delayed_tree_ref *full_ref, + int action), + + TP_ARGS(fs_info, ref, full_ref, action), + + TP_FIELDS( + ctf_integer(u64, bytenr, ref->bytenr) + ctf_integer(u64, num_bytes, ref->num_bytes) + ctf_integer(int, action, action) + ctf_integer(u64, parent, full_ref->parent) + ctf_integer(u64, ref_root, full_ref->root) + ctf_integer(int, level, full_ref->level) + ctf_integer(int, type, ref->type) + ctf_integer(u64, seq, ref->seq) + ) +) +#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(4,8,0)) LTTNG_TRACEPOINT_EVENT(btrfs_delayed_tree_ref, TP_PROTO(struct btrfs_fs_info *fs_info, @@ -464,7 +716,42 @@ LTTNG_TRACEPOINT_EVENT(btrfs_delayed_ref_head, ) #endif -#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,14,0)) + +LTTNG_TRACEPOINT_EVENT_CLASS(btrfs__chunk, + + TP_PROTO(const struct btrfs_fs_info *fs_info, const struct map_lookup *map, + u64 offset, u64 size), + + TP_ARGS(fs_info, map, offset, size), + + TP_FIELDS( + ctf_integer(int, num_stripes, map->num_stripes) + ctf_integer(u64, type, map->type) + ctf_integer(int, sub_stripes, map->sub_stripes) + ctf_integer(u64, offset, offset) + ctf_integer(u64, size, size) + ctf_integer(u64, root_objectid, fs_info->chunk_root->root_key.objectid) + ) +) + +LTTNG_TRACEPOINT_EVENT_INSTANCE(btrfs__chunk, btrfs_chunk_alloc, + + TP_PROTO(const struct btrfs_fs_info *info, const struct map_lookup *map, + u64 offset, u64 size), + + TP_ARGS(info, map, offset, size) +) + +LTTNG_TRACEPOINT_EVENT_INSTANCE(btrfs__chunk, btrfs_chunk_free, + + TP_PROTO(const struct btrfs_fs_info *info, const struct map_lookup *map, + u64 offset, u64 size), + + TP_ARGS(info, map, offset, size) +) + +#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) LTTNG_TRACEPOINT_EVENT_CLASS(btrfs__chunk, @@ -536,6 +823,24 @@ LTTNG_TRACEPOINT_EVENT_INSTANCE(btrfs__chunk, btrfs_chunk_free, #endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) */ +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,14,0)) +LTTNG_TRACEPOINT_EVENT(btrfs_cow_block, + + TP_PROTO(const struct btrfs_root *root, const struct extent_buffer *buf, + const struct extent_buffer *cow), + + TP_ARGS(root, buf, cow), + + TP_FIELDS( + ctf_integer(u64, root_objectid, root->root_key.objectid) + ctf_integer(u64, buf_start, buf->start) + ctf_integer(int, refs, atomic_read(&buf->refs)) + ctf_integer(u64, cow_start, cow->start) + ctf_integer(int, buf_level, btrfs_header_level(buf)) + ctf_integer(int, cow_level, btrfs_header_level(cow)) + ) +) +#else LTTNG_TRACEPOINT_EVENT(btrfs_cow_block, TP_PROTO(struct btrfs_root *root, struct extent_buffer *buf, @@ -552,8 +857,25 @@ LTTNG_TRACEPOINT_EVENT(btrfs_cow_block, ctf_integer(int, cow_level, btrfs_header_level(cow)) ) ) +#endif -#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0)) +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,14,0)) +LTTNG_TRACEPOINT_EVENT(btrfs_space_reservation, + + TP_PROTO(const struct btrfs_fs_info *fs_info, char *type, u64 val, + u64 bytes, int reserve), + + TP_ARGS(fs_info, type, val, bytes, reserve), + + TP_FIELDS( + ctf_array(u8, fsid, fs_info->fsid, BTRFS_UUID_SIZE) + ctf_string(type, type) + ctf_integer(u64, val, val) + ctf_integer(u64, bytes, bytes) + ctf_integer(int, reserve, reserve) + ) +) +#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0)) LTTNG_TRACEPOINT_EVENT(btrfs_space_reservation, TP_PROTO(struct btrfs_fs_info *fs_info, char *type, u64 val, @@ -571,7 +893,35 @@ LTTNG_TRACEPOINT_EVENT(btrfs_space_reservation, ) #endif -#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,14,0)) + +LTTNG_TRACEPOINT_EVENT_CLASS(btrfs__reserved_extent, + + TP_PROTO(const struct btrfs_fs_info *info, u64 start, u64 len), + + TP_ARGS(info, start, len), + + TP_FIELDS( + ctf_integer(u64, start, start) + ctf_integer(u64, len, len) + ) +) + +LTTNG_TRACEPOINT_EVENT_INSTANCE(btrfs__reserved_extent, btrfs_reserved_extent_alloc, + + TP_PROTO(const struct btrfs_fs_info *info, u64 start, u64 len), + + TP_ARGS(info, start, len) +) + +LTTNG_TRACEPOINT_EVENT_INSTANCE(btrfs__reserved_extent, btrfs_reserved_extent_free, + + TP_PROTO(const struct btrfs_fs_info *info, u64 start, u64 len), + + TP_ARGS(info, start, len) +) + +#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) LTTNG_TRACEPOINT_EVENT_CLASS(btrfs__reserved_extent, @@ -630,10 +980,60 @@ LTTNG_TRACEPOINT_EVENT_INSTANCE(btrfs__reserved_extent, btrfs_reserved_extent_f #endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) */ -#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0)) - #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) +LTTNG_TRACEPOINT_EVENT_MAP(find_free_extent, + + btrfs_find_free_extent, + + TP_PROTO(const struct btrfs_fs_info *info, u64 num_bytes, u64 empty_size, + u64 data), + + TP_ARGS(info, num_bytes, empty_size, data), + + TP_FIELDS( + ctf_integer(u64, num_bytes, num_bytes) + ctf_integer(u64, empty_size, empty_size) + ctf_integer(u64, data, data) + ) +) + +LTTNG_TRACEPOINT_EVENT_CLASS(btrfs__reserve_extent, + + TP_PROTO(const struct btrfs_fs_info *info, + const struct btrfs_block_group_cache *block_group, u64 start, + u64 len), + + TP_ARGS(info, block_group, start, len), + + TP_FIELDS( + ctf_integer(u64, bg_objectid, block_group->key.objectid) + ctf_integer(u64, flags, block_group->flags) + ctf_integer(u64, start, start) + ctf_integer(u64, len, len) + ) +) + +LTTNG_TRACEPOINT_EVENT_INSTANCE(btrfs__reserve_extent, btrfs_reserve_extent, + + TP_PROTO(const struct btrfs_fs_info *info, + const struct btrfs_block_group_cache *block_group, u64 start, + u64 len), + + TP_ARGS(info, block_group, start, len) +) + +LTTNG_TRACEPOINT_EVENT_INSTANCE(btrfs__reserve_extent, btrfs_reserve_extent_cluster, + + TP_PROTO(const struct btrfs_fs_info *info, + const struct btrfs_block_group_cache *block_group, u64 start, + u64 len), + + TP_ARGS(info, block_group, start, len) +) + +#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) + LTTNG_TRACEPOINT_EVENT_MAP(find_free_extent, btrfs_find_free_extent, @@ -684,7 +1084,7 @@ LTTNG_TRACEPOINT_EVENT_INSTANCE(btrfs__reserve_extent, btrfs_reserve_extent_clus TP_ARGS(info, block_group, start, len) ) -#else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) */ +#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0)) LTTNG_TRACEPOINT_EVENT_MAP(find_free_extent, @@ -740,6 +1140,52 @@ LTTNG_TRACEPOINT_EVENT_INSTANCE(btrfs__reserve_extent, btrfs_reserve_extent_clus #endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) */ +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,14,0)) +LTTNG_TRACEPOINT_EVENT(btrfs_find_cluster, + + TP_PROTO(const struct btrfs_block_group_cache *block_group, u64 start, + u64 bytes, u64 empty_size, u64 min_bytes), + + TP_ARGS(block_group, start, bytes, empty_size, min_bytes), + + TP_FIELDS( + ctf_integer(u64, bg_objectid, block_group->key.objectid) + ctf_integer(u64, flags, block_group->flags) + ctf_integer(u64, start, start) + ctf_integer(u64, bytes, bytes) + ctf_integer(u64, empty_size, empty_size) + ctf_integer(u64, min_bytes, min_bytes) + ) +) + +LTTNG_TRACEPOINT_EVENT(btrfs_failed_cluster_setup, + + TP_PROTO(const struct btrfs_block_group_cache *block_group), + + TP_ARGS(block_group), + + TP_FIELDS( + ctf_integer(u64, bg_objectid, block_group->key.objectid) + ) +) + +LTTNG_TRACEPOINT_EVENT(btrfs_setup_cluster, + + TP_PROTO(const struct btrfs_block_group_cache *block_group, + const struct btrfs_free_cluster *cluster, u64 size, int bitmap), + + TP_ARGS(block_group, cluster, size, bitmap), + + TP_FIELDS( + ctf_integer(u64, bg_objectid, block_group->key.objectid) + ctf_integer(u64, flags, block_group->flags) + ctf_integer(u64, start, cluster->window_start) + ctf_integer(u64, max_size, cluster->max_size) + ctf_integer(u64, size, size) + ctf_integer(int, bitmap, bitmap) + ) +) +#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0)) LTTNG_TRACEPOINT_EVENT(btrfs_find_cluster, TP_PROTO(struct btrfs_block_group_cache *block_group, u64 start, @@ -786,7 +1232,36 @@ LTTNG_TRACEPOINT_EVENT(btrfs_setup_cluster, ) #endif -#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0)) +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,14,0)) +LTTNG_TRACEPOINT_EVENT_MAP(alloc_extent_state, + + btrfs_alloc_extent_state, + + TP_PROTO(const struct extent_state *state, gfp_t mask, unsigned long IP), + + TP_ARGS(state, mask, IP), + + TP_FIELDS( + ctf_integer_hex(const struct extent_state *, state, state) + ctf_integer(gfp_t, mask, mask) + ctf_integer(unsigned long, ip, IP) + ) +) + +LTTNG_TRACEPOINT_EVENT_MAP(free_extent_state, + + btrfs_free_extent_state, + + TP_PROTO(const struct extent_state *state, unsigned long IP), + + TP_ARGS(state, IP), + + TP_FIELDS( + ctf_integer_hex(const struct extent_state *, state, state) + ctf_integer(unsigned long, ip, IP) + ) +) +#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0)) LTTNG_TRACEPOINT_EVENT_MAP(alloc_extent_state, btrfs_alloc_extent_state,