From: Andrey Albershteyn <aalbersh@xxxxxxxxxx> fs-verity previously had debug printk but it was removed. This patch adds trace points to the same places where printk were used (with a few additional ones). Signed-off-by: Andrey Albershteyn <aalbersh@xxxxxxxxxx> Reviewed-by: Darrick J. Wong <djwong@xxxxxxxxxx> [djwong: fix formatting] Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx> --- MAINTAINERS | 1 fs/verity/enable.c | 4 + fs/verity/fsverity_private.h | 2 + fs/verity/init.c | 1 fs/verity/verify.c | 9 ++ include/trace/events/fsverity.h | 143 +++++++++++++++++++++++++++++++++++++++ 6 files changed, 160 insertions(+) create mode 100644 include/trace/events/fsverity.h diff --git a/MAINTAINERS b/MAINTAINERS index f6dc90559341f..e5be0b47b93b3 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -8825,6 +8825,7 @@ T: git https://git.kernel.org/pub/scm/fs/fsverity/linux.git F: Documentation/filesystems/fsverity.rst F: fs/verity/ F: include/linux/fsverity.h +F: include/trace/events/fsverity.h F: include/uapi/linux/fsverity.h FT260 FTDI USB-HID TO I2C BRIDGE DRIVER diff --git a/fs/verity/enable.c b/fs/verity/enable.c index 04e060880b792..9f743f9160100 100644 --- a/fs/verity/enable.c +++ b/fs/verity/enable.c @@ -227,6 +227,8 @@ static int enable_verity(struct file *filp, if (err) goto out; + trace_fsverity_enable(inode, ¶ms); + /* * Start enabling verity on this file, serialized by the inode lock. * Fail if verity is already enabled or is already being enabled. @@ -269,6 +271,8 @@ static int enable_verity(struct file *filp, goto rollback; } + trace_fsverity_tree_done(inode, vi, ¶ms); + /* * Tell the filesystem to finish enabling verity on the file. * Serialized with ->begin_enable_verity() by the inode lock. diff --git a/fs/verity/fsverity_private.h b/fs/verity/fsverity_private.h index c1f82a0ea4cfa..c1a306fd1f9b4 100644 --- a/fs/verity/fsverity_private.h +++ b/fs/verity/fsverity_private.h @@ -162,4 +162,6 @@ int fsverity_read_merkle_tree_block(struct inode *inode, void fsverity_drop_merkle_tree_block(struct inode *inode, struct fsverity_blockbuf *block); +#include <trace/events/fsverity.h> + #endif /* _FSVERITY_PRIVATE_H */ diff --git a/fs/verity/init.c b/fs/verity/init.c index cb2c9aac61ed0..3769d2dc9e3b4 100644 --- a/fs/verity/init.c +++ b/fs/verity/init.c @@ -5,6 +5,7 @@ * Copyright 2019 Google LLC */ +#define CREATE_TRACE_POINTS #include "fsverity_private.h" #include <linux/ratelimit.h> diff --git a/fs/verity/verify.c b/fs/verity/verify.c index cd0973c88cdba..c4c5e1c082de5 100644 --- a/fs/verity/verify.c +++ b/fs/verity/verify.c @@ -123,6 +123,9 @@ verify_data_block(struct inode *inode, struct fsverity_info *vi, /* Byte offset of the wanted hash relative to @addr */ unsigned int hoffset; } hblocks[FS_VERITY_MAX_LEVELS]; + + trace_fsverity_verify_data_block(inode, params, data_pos); + /* * The index of the previous level's block within that level; also the * index of that block's hash within the current level. @@ -191,6 +194,9 @@ verify_data_block(struct inode *inode, struct fsverity_info *vi, if (is_hash_block_verified(inode, block, hblock_idx)) { memcpy(_want_hash, block->kaddr + hoffset, hsize); want_hash = _want_hash; + trace_fsverity_merkle_hit(inode, data_pos, hblock_idx, + level, + hoffset >> params->log_digestsize); fsverity_drop_merkle_tree_block(inode, block); goto descend; } @@ -225,6 +231,9 @@ verify_data_block(struct inode *inode, struct fsverity_info *vi, SetPageChecked((struct page *)block->context); memcpy(_want_hash, haddr + hoffset, hsize); want_hash = _want_hash; + trace_fsverity_verify_merkle_block(inode, + block->pos >> params->log_blocksize, + level, hoffset >> params->log_digestsize); fsverity_drop_merkle_tree_block(inode, block); } diff --git a/include/trace/events/fsverity.h b/include/trace/events/fsverity.h new file mode 100644 index 0000000000000..dab220884b897 --- /dev/null +++ b/include/trace/events/fsverity.h @@ -0,0 +1,143 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM fsverity + +#if !defined(_TRACE_FSVERITY_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_FSVERITY_H + +#include <linux/tracepoint.h> + +struct fsverity_descriptor; +struct merkle_tree_params; +struct fsverity_info; + +TRACE_EVENT(fsverity_enable, + TP_PROTO(const struct inode *inode, + const struct merkle_tree_params *params), + TP_ARGS(inode, params), + TP_STRUCT__entry( + __field(ino_t, ino) + __field(u64, data_size) + __field(unsigned int, block_size) + __field(unsigned int, num_levels) + __field(u64, tree_size) + ), + TP_fast_assign( + __entry->ino = inode->i_ino; + __entry->data_size = i_size_read(inode); + __entry->block_size = params->block_size; + __entry->num_levels = params->num_levels; + __entry->tree_size = params->tree_size; + ), + TP_printk("ino %lu data size %llu tree size %llu block size %u levels %u", + (unsigned long) __entry->ino, + __entry->data_size, + __entry->tree_size, + __entry->block_size, + __entry->num_levels) +); + +TRACE_EVENT(fsverity_tree_done, + TP_PROTO(const struct inode *inode, const struct fsverity_info *vi, + const struct merkle_tree_params *params), + TP_ARGS(inode, vi, params), + TP_STRUCT__entry( + __field(ino_t, ino) + __field(unsigned int, levels) + __field(unsigned int, block_size) + __field(u64, tree_size) + __dynamic_array(u8, root_hash, params->digest_size) + __dynamic_array(u8, file_digest, params->digest_size) + ), + TP_fast_assign( + __entry->ino = inode->i_ino; + __entry->levels = params->num_levels; + __entry->block_size = params->block_size; + __entry->tree_size = params->tree_size; + memcpy(__get_dynamic_array(root_hash), vi->root_hash, __get_dynamic_array_len(root_hash)); + memcpy(__get_dynamic_array(file_digest), vi->file_digest, __get_dynamic_array_len(file_digest)); + ), + TP_printk("ino %lu levels %d block_size %d tree_size %lld root_hash %s digest %s", + (unsigned long) __entry->ino, + __entry->levels, + __entry->block_size, + __entry->tree_size, + __print_hex_str(__get_dynamic_array(root_hash), __get_dynamic_array_len(root_hash)), + __print_hex_str(__get_dynamic_array(file_digest), __get_dynamic_array_len(file_digest))) +); + +TRACE_EVENT(fsverity_verify_data_block, + TP_PROTO(const struct inode *inode, + const struct merkle_tree_params *params, + u64 data_pos), + TP_ARGS(inode, params, data_pos), + TP_STRUCT__entry( + __field(ino_t, ino) + __field(u64, data_pos) + __field(unsigned int, block_size) + ), + TP_fast_assign( + __entry->ino = inode->i_ino; + __entry->data_pos = data_pos; + __entry->block_size = params->block_size; + ), + TP_printk("ino %lu pos %lld merkle_blocksize %u", + (unsigned long) __entry->ino, + __entry->data_pos, + __entry->block_size) +); + +TRACE_EVENT(fsverity_merkle_hit, + TP_PROTO(const struct inode *inode, u64 data_pos, + unsigned long hblock_idx, unsigned int level, + unsigned int hidx), + TP_ARGS(inode, data_pos, hblock_idx, level, hidx), + TP_STRUCT__entry( + __field(ino_t, ino) + __field(u64, data_pos) + __field(unsigned long, hblock_idx) + __field(unsigned int, level) + __field(unsigned int, hidx) + ), + TP_fast_assign( + __entry->ino = inode->i_ino; + __entry->data_pos = data_pos; + __entry->hblock_idx = hblock_idx; + __entry->level = level; + __entry->hidx = hidx; + ), + TP_printk("ino %lu data_pos %llu hblock_idx %lu level %u hidx %u", + (unsigned long) __entry->ino, + __entry->data_pos, + __entry->hblock_idx, + __entry->level, + __entry->hidx) +); + +TRACE_EVENT(fsverity_verify_merkle_block, + TP_PROTO(const struct inode *inode, unsigned long index, + unsigned int level, unsigned int hidx), + TP_ARGS(inode, index, level, hidx), + TP_STRUCT__entry( + __field(ino_t, ino) + __field(unsigned long, index) + __field(unsigned int, level) + __field(unsigned int, hidx) + ), + TP_fast_assign( + __entry->ino = inode->i_ino; + __entry->index = index; + __entry->level = level; + __entry->hidx = hidx; + ), + TP_printk("ino %lu index %lu level %u hidx %u", + (unsigned long) __entry->ino, + __entry->index, + __entry->level, + __entry->hidx) +); + +#endif /* _TRACE_FSVERITY_H */ + +/* This part must be outside protection */ +#include <trace/define_trace.h>
