From: Michael Jeanson Date: Tue, 10 Dec 2019 16:41:13 +0000 (-0500) Subject: fix: btrfs block group struct refactor (v5.5) X-Git-Tag: v2.12.0-pre~13 X-Git-Url: http://git.lttng.org/?p=lttng-modules.git;a=commitdiff_plain;h=5809d816fc124d598e689d8914a7e064667d2aeb fix: btrfs block group struct refactor (v5.5) See upstream commits: commit 32da5386d9a4fd5c1155cecf703df104d918954c Author: David Sterba Date: Tue Oct 29 19:20:18 2019 +0100 btrfs: rename btrfs_block_group_cache The type name is misleading, a single entry is named 'cache' while this normally means a collection of objects. Rename that everywhere. Also the identifier was quite long, making function prototypes harder to format. commit b3470b5dbe1300dea94191ae4b7d070be9a5cdc9 Author: David Sterba Date: Wed Oct 23 18:48:22 2019 +0200 btrfs: add dedicated members for start and length of a block group The on-disk format of block group item makes use of the key that stores the offset and length. This is further used in the code, although this makes thing harder to understand. The key is also packed so the offset/length is not properly aligned as u64. Add start (key.objectid) and length (key.offset) members to block group and remove the embedded key. When the item is searched or written, a local variable for key is used. commit bf38be65f3703d5ef3661c0a2802bc28e76b8f19 Author: David Sterba Date: Wed Oct 23 18:48:11 2019 +0200 btrfs: move block_group_item::used to block group For unknown reasons, the member 'used' in the block group struct is stored in the b-tree item and accessed everywhere using the special accessor helper. Let's unify it and make it a regular member and only update the item before writing it to the tree. The item is still being used for flags and chunk_objectid, there's some duplication until the item is removed in following patches. 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 c548cf21..1ad5fd27 100644 --- a/instrumentation/events/lttng-module/btrfs.h +++ b/instrumentation/events/lttng-module/btrfs.h @@ -20,8 +20,12 @@ struct btrfs_delayed_ref_node; struct btrfs_delayed_tree_ref; struct btrfs_delayed_data_ref; struct btrfs_delayed_ref_head; -#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0)) +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,5,0)) +struct btrfs_block_group; +#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0)) struct btrfs_block_group_cache; +#endif +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0)) struct btrfs_free_cluster; #endif struct map_lookup; @@ -660,7 +664,25 @@ LTTNG_TRACEPOINT_EVENT(btrfs_sync_fs, ) #endif -#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,14,0) || \ +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,5,0)) +LTTNG_TRACEPOINT_EVENT(btrfs_add_block_group, + + TP_PROTO(const struct btrfs_fs_info *fs_info, + const struct btrfs_block_group *block_group, int create), + + TP_ARGS(fs_info, block_group, create), + + TP_FIELDS( + ctf_array(u8, fsid, lttng_fs_info_fsid, BTRFS_UUID_SIZE) + ctf_integer(u64, offset, block_group->start) + ctf_integer(u64, size, block_group->length) + ctf_integer(u64, flags, block_group->flags) + ctf_integer(u64, bytes_used, block_group->used) + ctf_integer(u64, bytes_super, block_group->bytes_super) + ctf_integer(int, create, create) + ) +) +#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(4,14,0) || \ LTTNG_SLE_KERNEL_RANGE(4,4,73,5,0,0, 4,4,73,6,0,0) || \ LTTNG_SLE_KERNEL_RANGE(4,4,82,6,0,0, 4,4,82,7,0,0) || \ LTTNG_SLE_KERNEL_RANGE(4,4,92,6,0,0, 4,4,92,7,0,0) || \ @@ -1777,7 +1799,57 @@ 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(4,18,0)) +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,5,0)) +LTTNG_TRACEPOINT_EVENT_MAP(find_free_extent, + + btrfs_find_free_extent, + + TP_PROTO(const struct btrfs_fs_info *fs_info, u64 num_bytes, u64 empty_size, + u64 data), + + TP_ARGS(fs_info, num_bytes, empty_size, data), + + TP_FIELDS( + ctf_array(u8, fsid, lttng_fs_info_fsid, BTRFS_UUID_SIZE) + 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_block_group *block_group, u64 start, + u64 len), + + TP_ARGS(block_group, start, len), + + TP_FIELDS( + ctf_array(u8, fsid, block_group->lttng_fs_info_fsid, BTRFS_UUID_SIZE) + ctf_integer(u64, bg_objectid, block_group->start) + 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_block_group *block_group, u64 start, + u64 len), + + TP_ARGS(block_group, start, len) +) + +LTTNG_TRACEPOINT_EVENT_INSTANCE(btrfs__reserve_extent, btrfs_reserve_extent_cluster, + + TP_PROTO(const struct btrfs_block_group *block_group, u64 start, + u64 len), + + TP_ARGS(block_group, start, len) +) + +#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(4,18,0)) LTTNG_TRACEPOINT_EVENT_MAP(find_free_extent, btrfs_find_free_extent, @@ -2045,7 +2117,52 @@ 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) || \ +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,5,0)) +LTTNG_TRACEPOINT_EVENT(btrfs_find_cluster, + + TP_PROTO(const struct btrfs_block_group *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->start) + 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 *block_group), + + TP_ARGS(block_group), + + TP_FIELDS( + ctf_integer(u64, bg_objectid, block_group->start) + ) +) + +LTTNG_TRACEPOINT_EVENT(btrfs_setup_cluster, + + TP_PROTO(const struct btrfs_block_group *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->start) + 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(4,14,0) || \ LTTNG_SLE_KERNEL_RANGE(4,4,73,5,0,0, 4,4,73,6,0,0) || \ LTTNG_SLE_KERNEL_RANGE(4,4,82,6,0,0, 4,4,82,7,0,0) || \ LTTNG_SLE_KERNEL_RANGE(4,4,92,6,0,0, 4,4,92,7,0,0) || \