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 | 3 + fs/verity/fsverity_private.h | 2 fs/verity/init.c | 1 fs/verity/signature.c | 2 fs/verity/verify.c | 7 ++ include/trace/events/fsverity.h | 181 +++++++++++++++++++++++++++++++++++++++ 7 files changed, 197 insertions(+) create mode 100644 include/trace/events/fsverity.h diff --git a/MAINTAINERS b/MAINTAINERS index 73d898383e51..f735d3e68514 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -8740,6 +8740,7 @@ 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 04e060880b79..945eba0092ab 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, desc, ¶ms); + /* * Start enabling verity on this file, serialized by the inode lock. * Fail if verity is already enabled or is already being enabled. @@ -255,6 +257,7 @@ static int enable_verity(struct file *filp, fsverity_err(inode, "Error %d building Merkle tree", err); goto rollback; } + trace_fsverity_tree_done(inode, desc, ¶ms); /* * Create the fsverity_info. Don't bother trying to save work by diff --git a/fs/verity/fsverity_private.h b/fs/verity/fsverity_private.h index dad33e6ff0d6..fd8f5a8d1f6a 100644 --- a/fs/verity/fsverity_private.h +++ b/fs/verity/fsverity_private.h @@ -162,4 +162,6 @@ void __init fsverity_init_workqueue(void); void fsverity_drop_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 cb2c9aac61ed..3769d2dc9e3b 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/signature.c b/fs/verity/signature.c index 90c07573dd77..c1f08bb32ed1 100644 --- a/fs/verity/signature.c +++ b/fs/verity/signature.c @@ -53,6 +53,8 @@ int fsverity_verify_signature(const struct fsverity_info *vi, struct fsverity_formatted_digest *d; int err; + trace_fsverity_verify_signature(inode, signature, sig_size); + if (sig_size == 0) { if (fsverity_require_signatures) { fsverity_err(inode, diff --git a/fs/verity/verify.c b/fs/verity/verify.c index 4ebdf9d2d7b6..aa1763e8b723 100644 --- a/fs/verity/verify.c +++ b/fs/verity/verify.c @@ -118,6 +118,7 @@ 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_block(inode, 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. @@ -215,6 +216,8 @@ 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_tree_block_verified(inode, + block, FSVERITY_TRACE_DIR_ASCEND); fsverity_drop_block(inode, block); goto descend; } @@ -248,6 +251,8 @@ verify_data_block(struct inode *inode, struct fsverity_info *vi, SetPageChecked(hpage); memcpy(_want_hash, haddr + hoffset, hsize); want_hash = _want_hash; + trace_fsverity_merkle_tree_block_verified(inode, block, + FSVERITY_TRACE_DIR_DESCEND); fsverity_drop_block(inode, block); } @@ -405,6 +410,8 @@ void fsverity_invalidate_block(struct inode *inode, struct fsverity_info *vi = inode->i_verity_info; const unsigned int log_blocksize = vi->tree_params.log_blocksize; + trace_fsverity_invalidate_block(inode, block); + if (block->offset > vi->tree_params.tree_size) { fsverity_err(inode, "Trying to invalidate beyond Merkle tree (tree %lld, offset %lld)", diff --git a/include/trace/events/fsverity.h b/include/trace/events/fsverity.h new file mode 100644 index 000000000000..763890e47358 --- /dev/null +++ b/include/trace/events/fsverity.h @@ -0,0 +1,181 @@ +/* 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; + +#define FSVERITY_TRACE_DIR_ASCEND (1ul << 0) +#define FSVERITY_TRACE_DIR_DESCEND (1ul << 1) +#define FSVERITY_HASH_SHOWN_LEN 20 + +TRACE_EVENT(fsverity_enable, + TP_PROTO(struct inode *inode, struct fsverity_descriptor *desc, + struct merkle_tree_params *params), + TP_ARGS(inode, desc, 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 = desc->data_size; + __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(struct inode *inode, struct fsverity_descriptor *desc, + struct merkle_tree_params *params), + TP_ARGS(inode, desc, params), + TP_STRUCT__entry( + __field(ino_t, ino) + __field(unsigned int, levels) + __field(unsigned int, tree_blocks) + __field(u64, tree_size) + __array(u8, tree_hash, 64) + ), + TP_fast_assign( + __entry->ino = inode->i_ino; + __entry->levels = params->num_levels; + __entry->tree_blocks = + params->tree_size >> params->log_blocksize; + __entry->tree_size = params->tree_size; + memcpy(__entry->tree_hash, desc->root_hash, 64); + ), + TP_printk("ino %lu levels %d tree_blocks %d tree_size %lld root_hash %s", + (unsigned long) __entry->ino, + __entry->levels, + __entry->tree_blocks, + __entry->tree_size, + __print_hex(__entry->tree_hash, 64)) +); + +TRACE_EVENT(fsverity_verify_block, + TP_PROTO(struct inode *inode, u64 offset), + TP_ARGS(inode, offset), + TP_STRUCT__entry( + __field(ino_t, ino) + __field(u64, offset) + __field(unsigned int, block_size) + ), + TP_fast_assign( + __entry->ino = inode->i_ino; + __entry->offset = offset; + __entry->block_size = + inode->i_verity_info->tree_params.block_size; + ), + TP_printk("ino %lu data offset %lld data block size %u", + (unsigned long) __entry->ino, + __entry->offset, + __entry->block_size) +); + +TRACE_EVENT(fsverity_merkle_tree_block_verified, + TP_PROTO(struct inode *inode, + struct fsverity_blockbuf *block, + u8 direction), + TP_ARGS(inode, block, direction), + TP_STRUCT__entry( + __field(ino_t, ino) + __field(u64, offset) + __field(u8, direction) + ), + TP_fast_assign( + __entry->ino = inode->i_ino; + __entry->offset = block->offset; + __entry->direction = direction; + ), + TP_printk("ino %lu block offset %llu %s", + (unsigned long) __entry->ino, + __entry->offset, + __entry->direction == 0 ? "ascend" : "descend") +); + +TRACE_EVENT(fsverity_invalidate_block, + TP_PROTO(struct inode *inode, struct fsverity_blockbuf *block), + TP_ARGS(inode, block), + TP_STRUCT__entry( + __field(ino_t, ino) + __field(u64, offset) + __field(unsigned int, block_size) + ), + TP_fast_assign( + __entry->ino = inode->i_ino; + __entry->offset = block->offset; + __entry->block_size = block->size; + ), + TP_printk("ino %lu block position %llu block size %u", + (unsigned long) __entry->ino, + __entry->offset, + __entry->block_size) +); + +TRACE_EVENT(fsverity_read_merkle_tree_block, + TP_PROTO(struct inode *inode, u64 offset, unsigned int log_blocksize), + TP_ARGS(inode, offset, log_blocksize), + TP_STRUCT__entry( + __field(ino_t, ino) + __field(u64, offset) + __field(u64, index) + __field(unsigned int, block_size) + ), + TP_fast_assign( + __entry->ino = inode->i_ino; + __entry->offset = offset; + __entry->index = offset >> log_blocksize; + __entry->block_size = 1 << log_blocksize; + ), + TP_printk("ino %lu tree offset %llu block index %llu block hize %u", + (unsigned long) __entry->ino, + __entry->offset, + __entry->index, + __entry->block_size) +); + +TRACE_EVENT(fsverity_verify_signature, + TP_PROTO(const struct inode *inode, const u8 *signature, size_t sig_size), + TP_ARGS(inode, signature, sig_size), + TP_STRUCT__entry( + __field(ino_t, ino) + __dynamic_array(u8, signature, sig_size) + __field(size_t, sig_size) + __field(size_t, sig_size_show) + ), + TP_fast_assign( + __entry->ino = inode->i_ino; + memcpy(__get_dynamic_array(signature), signature, sig_size); + __entry->sig_size = sig_size; + __entry->sig_size_show = (sig_size > FSVERITY_HASH_SHOWN_LEN ? + FSVERITY_HASH_SHOWN_LEN : sig_size); + ), + TP_printk("ino %lu sig_size %zu %s%s%s", + (unsigned long) __entry->ino, + __entry->sig_size, + (__entry->sig_size ? "sig " : ""), + __print_hex(__get_dynamic_array(signature), + __entry->sig_size_show), + (__entry->sig_size ? "..." : "")) +); + +#endif /* _TRACE_FSVERITY_H */ + +/* This part must be outside protection */ +#include <trace/define_trace.h>
