[08/21] trace-cmd library: Reuse within the library the function that checks file state.

Message ID	20210910134757.2863982-9-tz.stoyanov@gmail.com (mailing list archive)
State	Superseded
Headers	show Return-Path: <linux-trace-devel-owner@kernel.org> From: "Tzvetomir Stoyanov (VMware)" <tz.stoyanov@gmail.com> To: rostedt@goodmis.org Cc: linux-trace-devel@vger.kernel.org Subject: [PATCH 08/21] trace-cmd library: Reuse within the library the function that checks file state. Date: Fri, 10 Sep 2021 16:47:44 +0300 Message-Id: <20210910134757.2863982-9-tz.stoyanov@gmail.com> In-Reply-To: <20210910134757.2863982-1-tz.stoyanov@gmail.com> References: <20210910134757.2863982-1-tz.stoyanov@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk
Series	trace-cmd fixes and clean-ups \| expand [00/21] trace-cmd fixes and clean-ups [01/21] trace-cmd library: Read option id with correct endian [02/21] trace-cmd report: Fix typos in error messages [03/21] trace-cmd library: Fix version string memory leak [04/21] trace-cmd library: Fixed a memory leak on input handler close [05/21] trace-cmd library: Do not pass guests list to a buffer instance [06/21] trace-cmd library: Set long size to the input tep handler when it is read from the file [07/21] trace-cmd library: Do not use local variables when reading CPU stat option [08/21] trace-cmd library: Reuse within the library the function that checks file state. [09/21] trace-cmd library: Fix possible memory leak in read_ftrace_files() [10/21] trace-cmd library: Fix possible memory leak in read_event_files() [11/21] trace-cmd library: Fix possible memory leak in read_proc_kallsyms() [12/21] trace-cmd library: Fix possible memory leak in read_ftrace_printk() [13/21] trace-cmd library: Fix possible memory leak in read_and_parse_cmdlines() [14/21] trace-cmd library: Set input handler default values in allocation function [15/21] trace-cmd library: Track maximum CPUs count in input handler [16/21] trace-cmd report: Close input file handlers on exit [17/21] trace-cmd report: Do not print empty buffer name [18/21] trace-cmd library: Set correct CPU to the record, retrieved with tracecmd_peek_data [19/21] trace-cmd library: Refactor APIs for creating output handler [20/21] trace-cmd library: Refactor the logic for writing trace data in the file [21/21] trace-cmd report: Init the top trace instance earlier

diff --git a/lib/trace-cmd/include/trace-cmd-local.h b/lib/trace-cmd/include/trace-cmd-local.h index 821b5cdb..7f3b45a8 100644 --- a/lib/trace-cmd/include/trace-cmd-local.h +++ b/lib/trace-cmd/include/trace-cmd-local.h @@ -31,5 +31,7 @@ void tracecmd_info(const char *fmt, ...); #endif #endif +bool check_file_state(unsigned long file_version, int current_state, int new_state); +bool check_out_state(struct tracecmd_output *handle, int new_state); #endif /* _TRACE_CMD_LOCAL_H */ diff --git a/lib/trace-cmd/trace-input.c b/lib/trace-cmd/trace-input.c index dd7689a3..2f749d0b 100644 --- a/lib/trace-cmd/trace-input.c +++ b/lib/trace-cmd/trace-input.c @@ -4224,3 +4224,4 @@ int tracecmd_enable_tsync(struct tracecmd_input *handle, bool enable) return 0; } + diff --git a/lib/trace-cmd/trace-output.c b/lib/trace-cmd/trace-output.c index a8de107c..fe1d1aaa 100644 --- a/lib/trace-cmd/trace-output.c +++ b/lib/trace-cmd/trace-output.c @@ -307,33 +307,6 @@ int tracecmd_ftrace_enable(int set) return ret; } -static int check_out_state(struct tracecmd_output *handle, int new_state) -{ - if (!handle) - return -1; - - switch (new_state) { - case TRACECMD_FILE_HEADERS: - case TRACECMD_FILE_FTRACE_EVENTS: - case TRACECMD_FILE_ALL_EVENTS: - case TRACECMD_FILE_KALLSYMS: - case TRACECMD_FILE_PRINTK: - case TRACECMD_FILE_CMD_LINES: - case TRACECMD_FILE_CPU_COUNT: - case TRACECMD_FILE_OPTIONS: - if (handle->file_state == (new_state - 1)) - return 0; - break; - case TRACECMD_FILE_CPU_LATENCY: - case TRACECMD_FILE_CPU_FLYRECORD: - if (handle->file_state == TRACECMD_FILE_OPTIONS) - return 0; - break; - } - - return -1; -} - static int read_header_files(struct tracecmd_output *handle) { tsize_t size, check_size, endian8; @@ -342,7 +315,7 @@ static int read_header_files(struct tracecmd_output *handle) int fd; int ret; - if (check_out_state(handle, TRACECMD_FILE_HEADERS) < 0) { + if (!check_out_state(handle, TRACECMD_FILE_HEADERS)) { tracecmd_warning("Cannot read header files, unexpected state 0x%X", handle->file_state); return -1; @@ -654,7 +627,7 @@ static int read_ftrace_files(struct tracecmd_output *handle) struct tracecmd_event_list list = { .glob = "ftrace/*" }; int ret; - if (check_out_state(handle, TRACECMD_FILE_FTRACE_EVENTS) < 0) { + if (!check_out_state(handle, TRACECMD_FILE_FTRACE_EVENTS)) { tracecmd_warning("Cannot read ftrace files, unexpected state 0x%X", handle->file_state); return -1; @@ -695,7 +668,7 @@ static int read_event_files(struct tracecmd_output *handle, int endian4; int ret; - if (check_out_state(handle, TRACECMD_FILE_ALL_EVENTS) < 0) { + if (!check_out_state(handle, TRACECMD_FILE_ALL_EVENTS)) { tracecmd_warning("Cannot read event files, unexpected state 0x%X", handle->file_state); return -1; @@ -787,7 +760,7 @@ static int read_proc_kallsyms(struct tracecmd_output *handle, struct stat st; int ret; - if (check_out_state(handle, TRACECMD_FILE_KALLSYMS) < 0) { + if (!check_out_state(handle, TRACECMD_FILE_KALLSYMS)) { tracecmd_warning("Cannot read kallsyms, unexpected state 0x%X", handle->file_state); return -1; @@ -832,7 +805,7 @@ static int read_ftrace_printk(struct tracecmd_output *handle) char *path; int ret; - if (check_out_state(handle, TRACECMD_FILE_PRINTK) < 0) { + if (!check_out_state(handle, TRACECMD_FILE_PRINTK)) { tracecmd_warning("Cannot read printk, unexpected state 0x%X", handle->file_state); return -1; @@ -1134,11 +1107,10 @@ int tracecmd_write_cpus(struct tracecmd_output *handle, int cpus) { int ret; - ret = check_out_state(handle, TRACECMD_FILE_CPU_COUNT); - if (ret < 0) { + if (!check_out_state(handle, TRACECMD_FILE_CPU_COUNT)) { tracecmd_warning("Cannot write CPU count into the file, unexpected state 0x%X", handle->file_state); - return ret; + return -1; } cpus = convert_endian_4(handle, cpus); ret = do_write_check(handle, &cpus, 4); @@ -1154,16 +1126,14 @@ int tracecmd_write_options(struct tracecmd_output *handle) unsigned short option; unsigned short endian2; unsigned int endian4; - int ret; /* If already written, ignore */ if (handle->file_state == TRACECMD_FILE_OPTIONS) return 0; - ret = check_out_state(handle, TRACECMD_FILE_OPTIONS); - if (ret < 0) { + if (!check_out_state(handle, TRACECMD_FILE_OPTIONS)) { tracecmd_warning("Cannot write options into the file, unexpected state 0x%X", handle->file_state); - return ret; + return -1; } if (do_write_check(handle, "options ", 10)) @@ -1281,11 +1251,10 @@ int tracecmd_write_cmdlines(struct tracecmd_output *handle) { int ret; - ret = check_out_state(handle, TRACECMD_FILE_CMD_LINES); - if (ret < 0) { + if (!check_out_state(handle, TRACECMD_FILE_CMD_LINES)) { tracecmd_warning("Cannot write command lines into the file, unexpected state 0x%X", handle->file_state); - return ret; + return -1; } ret = save_tracing_file_data(handle, "saved_cmdlines"); if (ret < 0) @@ -1298,7 +1267,6 @@ struct tracecmd_output *tracecmd_create_file_latency(const char *output_file, in { struct tracecmd_output *handle; char *path; - int ret; handle = create_file(output_file, NULL, NULL, NULL, &all_event_list); if (!handle) @@ -1316,8 +1284,7 @@ struct tracecmd_output *tracecmd_create_file_latency(const char *output_file, in if (tracecmd_write_options(handle) < 0) goto out_free; - ret = check_out_state(handle, TRACECMD_FILE_CPU_LATENCY); - if (ret < 0) { + if (!check_out_state(handle, TRACECMD_FILE_CPU_LATENCY)) { tracecmd_warning("Cannot write latency data into the file, unexpected state 0x%X", handle->file_state); goto out_free; @@ -1399,7 +1366,9 @@ int tracecmd_write_cpu_data(struct tracecmd_output *handle, /* This can be called multiple times (when recording instances) */ ret = handle->file_state == TRACECMD_FILE_CPU_FLYRECORD ? 0 : - check_out_state(handle, TRACECMD_FILE_CPU_FLYRECORD); + check_file_state(handle->file_version, + handle->file_state, + TRACECMD_FILE_CPU_FLYRECORD); if (ret < 0) { tracecmd_warning("Cannot write trace data into the file, unexpected state 0x%X", handle->file_state); @@ -1661,3 +1630,8 @@ out_free: tracecmd_output_close(handle); return NULL; } + +__hidden bool check_out_state(struct tracecmd_output *handle, int new_state) +{ + return check_file_state(handle->file_version, handle->file_state, new_state); +} diff --git a/lib/trace-cmd/trace-util.c b/lib/trace-cmd/trace-util.c index 9bc94822..db7ce7ee 100644 --- a/lib/trace-cmd/trace-util.c +++ b/lib/trace-cmd/trace-util.c @@ -624,3 +624,31 @@ bool tracecmd_is_version_supported(unsigned int version) return true; return false; } + +__hidden bool check_file_state(unsigned long file_version, int current_state, int new_state) +{ + switch (new_state) { + case TRACECMD_FILE_HEADERS: + case TRACECMD_FILE_FTRACE_EVENTS: + case TRACECMD_FILE_ALL_EVENTS: + case TRACECMD_FILE_KALLSYMS: + case TRACECMD_FILE_PRINTK: + case TRACECMD_FILE_CMD_LINES: + case TRACECMD_FILE_CPU_COUNT: + if (current_state == (new_state - 1)) + return true; + break; + case TRACECMD_FILE_OPTIONS: + if (current_state == (new_state - 1)) + return true; + break; + case TRACECMD_FILE_CPU_LATENCY: + case TRACECMD_FILE_CPU_FLYRECORD: + if (current_state == TRACECMD_FILE_OPTIONS) + return true; + break; + } + + return false; +} +

[08/21] trace-cmd library: Reuse within the library the function that checks file state.

Commit Message

Patch