[v2,1/8] trace-cmd library: Use output handler when copying data from input file

Message ID	20210914131921.3967421-2-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State	Superseded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 v2 1/8] trace-cmd library: Use output handler when copying data from input file Date: Tue, 14 Sep 2021 16:19:14 +0300 Message-Id: <20210914131921.3967421-2-tz.stoyanov@gmail.com> In-Reply-To: <20210914131921.3967421-1-tz.stoyanov@gmail.com> References: <20210914131921.3967421-1-tz.stoyanov@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk
Series	trace-cmd convert \| expand [v2,0/8] trace-cmd convert [v2,1/8] trace-cmd library: Use output handler when copying data from input file [v2,2/8] trace-cmd library: Handle version 7 files when copying headers between files [v2,3/8] trace-cmd library: Copy CPU count between trace files [v2,4/8] trace-cmd library: New API to copy buffer description between trace files [v2,5/8] trace-cmd library: New API to copy options between trace files [v2,6/8] trace-cmd library: New API to copy trace data between trace files [v2,7/8] trace-cmd library: Extend tracecmd_copy() API [v2,8/8] trace-cmd: Add new subcommand "convert"

diff --git a/lib/trace-cmd/include/private/trace-cmd-private.h b/lib/trace-cmd/include/private/trace-cmd-private.h index 8f5408ff..8ff46d52 100644 --- a/lib/trace-cmd/include/private/trace-cmd-private.h +++ b/lib/trace-cmd/include/private/trace-cmd-private.h @@ -185,7 +185,8 @@ int tracecmd_get_parsing_failures(struct tracecmd_input *handle); int tracecmd_long_size(struct tracecmd_input *handle); int tracecmd_page_size(struct tracecmd_input *handle); int tracecmd_cpus(struct tracecmd_input *handle); -int tracecmd_copy_headers(struct tracecmd_input *handle, int fd, +int tracecmd_copy_headers(struct tracecmd_input *in_handle, + struct tracecmd_output *out_handle, enum tracecmd_file_states start_state, enum tracecmd_file_states end_state); void tracecmd_set_flag(struct tracecmd_input *handle, int flag); diff --git a/lib/trace-cmd/include/trace-cmd-local.h b/lib/trace-cmd/include/trace-cmd-local.h index 9ab33553..18d2d05b 100644 --- a/lib/trace-cmd/include/trace-cmd-local.h +++ b/lib/trace-cmd/include/trace-cmd-local.h @@ -57,6 +57,8 @@ out_write_section_header(struct tracecmd_output *handle, unsigned short header_i char *description, enum tracecmd_section_flags flags, bool option); int out_update_section_header(struct tracecmd_output *handle, unsigned long long offset); +long long do_write_check(struct tracecmd_output *handle, const void *data, long long size); + struct cpu_data_source { int fd; int size; diff --git a/lib/trace-cmd/trace-input.c b/lib/trace-cmd/trace-input.c index 290bcf5e..ab82fdff 100644 --- a/lib/trace-cmd/trace-input.c +++ b/lib/trace-cmd/trace-input.c @@ -4393,44 +4393,47 @@ void tracecmd_close(struct tracecmd_input *handle) free(handle); } -static int read_copy_size8(struct tracecmd_input *handle, int fd, unsigned long long *size) +static int read_copy_size8(struct tracecmd_input *in_handle, + struct tracecmd_output *out_handle, unsigned long long *size) { /* read size */ - if (do_read_check(handle, size, 8)) + if (do_read_check(in_handle, size, 8)) return -1; - if (__do_write_check(fd, size, 8)) + if (do_write_check(out_handle, size, 8)) return -1; - *size = tep_read_number(handle->pevent, size, 8); + *size = tep_read_number(in_handle->pevent, size, 8); return 0; } -static int read_copy_size4(struct tracecmd_input *handle, int fd, unsigned int *size) +static int read_copy_size4(struct tracecmd_input *in_handle, struct tracecmd_output *out_handle, + unsigned int *size) { /* read size */ - if (do_read_check(handle, size, 4)) + if (do_read_check(in_handle, size, 4)) return -1; - if (__do_write_check(fd, size, 4)) + if (do_write_check(out_handle, size, 4)) return -1; - *size = tep_read_number(handle->pevent, size, 4); + *size = tep_read_number(in_handle->pevent, size, 4); return 0; } -static int read_copy_data(struct tracecmd_input *handle, - unsigned long long size, int fd) +static int read_copy_data(struct tracecmd_input *in_handle, + unsigned long long size, + struct tracecmd_output *out_handle) { char *buf; buf = malloc(size); if (!buf) return -1; - if (do_read_check(handle, buf, size)) + if (do_read_check(in_handle, buf, size)) goto failed_read; - if (__do_write_check(fd, buf, size)) + if (do_write_check(out_handle, buf, size)) goto failed_read; free(buf); @@ -4442,65 +4445,66 @@ static int read_copy_data(struct tracecmd_input *handle, return -1; } -static int copy_header_files(struct tracecmd_input *handle, int fd) +static int copy_header_files(struct tracecmd_input *in_handle, + struct tracecmd_output *out_handle) { unsigned long long size; - if (handle->file_state != TRACECMD_FILE_HEADERS - 1) + if (in_handle->file_state != TRACECMD_FILE_HEADERS - 1) return -1; /* "header_page" */ - if (read_copy_data(handle, 12, fd) < 0) + if (read_copy_data(in_handle, 12, out_handle) < 0) return -1; - if (read_copy_size8(handle, fd, &size) < 0) + if (read_copy_size8(in_handle, out_handle, &size) < 0) return -1; - if (read_copy_data(handle, size, fd) < 0) + if (read_copy_data(in_handle, size, out_handle) < 0) return -1; /* "header_event" */ - if (read_copy_data(handle, 13, fd) < 0) + if (read_copy_data(in_handle, 13, out_handle) < 0) return -1; - if (read_copy_size8(handle, fd, &size) < 0) + if (read_copy_size8(in_handle, out_handle, &size) < 0) return -1; - if (read_copy_data(handle, size, fd) < 0) + if (read_copy_data(in_handle, size, out_handle) < 0) return -1; - handle->file_state = TRACECMD_FILE_HEADERS; + in_handle->file_state = TRACECMD_FILE_HEADERS; return 0; } -static int copy_ftrace_files(struct tracecmd_input *handle, int fd) +static int copy_ftrace_files(struct tracecmd_input *in_handle, struct tracecmd_output *out_handle) { unsigned long long size; unsigned int count; unsigned int i; - if (handle->file_state != TRACECMD_FILE_FTRACE_EVENTS - 1) + if (in_handle->file_state != TRACECMD_FILE_FTRACE_EVENTS - 1) return -1; - if (read_copy_size4(handle, fd, &count) < 0) + if (read_copy_size4(in_handle, out_handle, &count) < 0) return -1; for (i = 0; i < count; i++) { - if (read_copy_size8(handle, fd, &size) < 0) + if (read_copy_size8(in_handle, out_handle, &size) < 0) return -1; - if (read_copy_data(handle, size, fd) < 0) + if (read_copy_data(in_handle, size, out_handle) < 0) return -1; } - handle->file_state = TRACECMD_FILE_FTRACE_EVENTS; + in_handle->file_state = TRACECMD_FILE_FTRACE_EVENTS; return 0; } -static int copy_event_files(struct tracecmd_input *handle, int fd) +static int copy_event_files(struct tracecmd_input *in_handle, struct tracecmd_output *out_handle) { unsigned long long size; char *system; @@ -4508,103 +4512,103 @@ static int copy_event_files(struct tracecmd_input *handle, int fd) unsigned int count; unsigned int i,x; - if (handle->file_state != TRACECMD_FILE_ALL_EVENTS - 1) + if (in_handle->file_state != TRACECMD_FILE_ALL_EVENTS - 1) return -1; - if (read_copy_size4(handle, fd, &systems) < 0) + if (read_copy_size4(in_handle, out_handle, &systems) < 0) return -1; for (i = 0; i < systems; i++) { - system = read_string(handle); + system = read_string(in_handle); if (!system) return -1; - if (__do_write_check(fd, system, strlen(system) + 1)) { + if (do_write_check(out_handle, system, strlen(system) + 1)) { free(system); return -1; } free(system); - if (read_copy_size4(handle, fd, &count) < 0) + if (read_copy_size4(in_handle, out_handle, &count) < 0) return -1; for (x=0; x < count; x++) { - if (read_copy_size8(handle, fd, &size) < 0) + if (read_copy_size8(in_handle, out_handle, &size) < 0) return -1; - if (read_copy_data(handle, size, fd) < 0) + if (read_copy_data(in_handle, size, out_handle) < 0) return -1; } } - handle->file_state = TRACECMD_FILE_ALL_EVENTS; + in_handle->file_state = TRACECMD_FILE_ALL_EVENTS; return 0; } -static int copy_proc_kallsyms(struct tracecmd_input *handle, int fd) +static int copy_proc_kallsyms(struct tracecmd_input *in_handle, struct tracecmd_output *out_handle) { unsigned int size; - if (handle->file_state != TRACECMD_FILE_KALLSYMS - 1) + if (in_handle->file_state != TRACECMD_FILE_KALLSYMS - 1) return -1; - if (read_copy_size4(handle, fd, &size) < 0) + if (read_copy_size4(in_handle, out_handle, &size) < 0) return -1; if (!size) return 0; /* OK? */ - if (read_copy_data(handle, size, fd) < 0) + if (read_copy_data(in_handle, size, out_handle) < 0) return -1; - handle->file_state = TRACECMD_FILE_KALLSYMS; + in_handle->file_state = TRACECMD_FILE_KALLSYMS; return 0; } -static int copy_ftrace_printk(struct tracecmd_input *handle, int fd) +static int copy_ftrace_printk(struct tracecmd_input *in_handle, struct tracecmd_output *out_handle) { unsigned int size; - if (handle->file_state != TRACECMD_FILE_PRINTK - 1) + if (in_handle->file_state != TRACECMD_FILE_PRINTK - 1) return -1; - if (read_copy_size4(handle, fd, &size) < 0) + if (read_copy_size4(in_handle, out_handle, &size) < 0) return -1; if (!size) return 0; /* OK? */ - if (read_copy_data(handle, size, fd) < 0) + if (read_copy_data(in_handle, size, out_handle) < 0) return -1; - handle->file_state = TRACECMD_FILE_PRINTK; + in_handle->file_state = TRACECMD_FILE_PRINTK; return 0; } -static int copy_command_lines(struct tracecmd_input *handle, int fd) +static int copy_command_lines(struct tracecmd_input *in_handle, struct tracecmd_output *out_handle) { unsigned long long size; - if (handle->file_state != TRACECMD_FILE_CMD_LINES - 1) + if (in_handle->file_state != TRACECMD_FILE_CMD_LINES - 1) return -1; - if (read_copy_size8(handle, fd, &size) < 0) + if (read_copy_size8(in_handle, out_handle, &size) < 0) return -1; if (!size) return 0; /* OK? */ - if (read_copy_data(handle, size, fd) < 0) + if (read_copy_data(in_handle, size, out_handle) < 0) return -1; - handle->file_state = TRACECMD_FILE_CMD_LINES; + in_handle->file_state = TRACECMD_FILE_CMD_LINES; return 0; } /** * tracecmd_copy_headers - Copy headers from a tracecmd_input handle to a file descriptor - * @handle: input handle for the trace.dat file to copy from. - * @fd: The file descriptor to copy to. + * @in_handle: input handle for the trace.dat file to copy from. + * @out_handle: output handle to the trace.dat file to copy to. * @start_state: The file state to start copying from (zero for the beginnig) * @end_state: The file state to stop at (zero for up to cmdlines) * @@ -4615,7 +4619,8 @@ static int copy_command_lines(struct tracecmd_input *handle, int fd) * NOTE: The input handle is also modified, and ends at the end * state as well. */ -int tracecmd_copy_headers(struct tracecmd_input *handle, int fd, +int tracecmd_copy_headers(struct tracecmd_input *in_handle, + struct tracecmd_output *out_handle, enum tracecmd_file_states start_state, enum tracecmd_file_states end_state) { @@ -4633,71 +4638,71 @@ int tracecmd_copy_headers(struct tracecmd_input *handle, int fd, if (end_state < TRACECMD_FILE_HEADERS) return 0; - if (handle->file_state >= start_state) { + if (in_handle->file_state >= start_state) { /* Set the handle to just before the start state */ - sec = section_open(handle, TRACECMD_OPTION_HEADER_INFO); + sec = section_open(in_handle, TRACECMD_OPTION_HEADER_INFO); if (!sec) return -1; /* Now that the file handle has moved, change its state */ - handle->file_state = TRACECMD_FILE_INIT; + in_handle->file_state = TRACECMD_FILE_INIT; } /* Try to bring the input up to the start state - 1 */ - ret = tracecmd_read_headers(handle, start_state - 1); + ret = tracecmd_read_headers(in_handle, start_state - 1); if (sec) - section_close(handle, sec); + section_close(in_handle, sec); if (ret < 0) goto out; switch (start_state) { case TRACECMD_FILE_HEADERS: - ret = copy_header_files(handle, fd); + ret = copy_header_files(in_handle, out_handle); if (ret < 0) goto out; /* fallthrough */ case TRACECMD_FILE_FTRACE_EVENTS: /* handle's state is now updating with the copies */ - if (end_state <= handle->file_state) + if (end_state <= in_handle->file_state) return 0; - ret = copy_ftrace_files(handle, fd); + ret = copy_ftrace_files(in_handle, out_handle); if (ret < 0) goto out; /* fallthrough */ case TRACECMD_FILE_ALL_EVENTS: - if (end_state <= handle->file_state) + if (end_state <= in_handle->file_state) return 0; - ret = copy_event_files(handle, fd); + ret = copy_event_files(in_handle, out_handle); if (ret < 0) goto out; /* fallthrough */ case TRACECMD_FILE_KALLSYMS: - if (end_state <= handle->file_state) + if (end_state <= in_handle->file_state) return 0; - ret = copy_proc_kallsyms(handle, fd); + ret = copy_proc_kallsyms(in_handle, out_handle); if (ret < 0) goto out; /* fallthrough */ case TRACECMD_FILE_PRINTK: - if (end_state <= handle->file_state) + if (end_state <= in_handle->file_state) return 0; - ret = copy_ftrace_printk(handle, fd); + ret = copy_ftrace_printk(in_handle, out_handle); if (ret < 0) goto out; /* fallthrough */ case TRACECMD_FILE_CMD_LINES: - if (end_state <= handle->file_state) + if (end_state <= in_handle->file_state) return 0; - ret = copy_command_lines(handle, fd); + ret = copy_command_lines(in_handle, out_handle); default: break; } diff --git a/lib/trace-cmd/trace-output.c b/lib/trace-cmd/trace-output.c index 33fb812b..dc396cba 100644 --- a/lib/trace-cmd/trace-output.c +++ b/lib/trace-cmd/trace-output.c @@ -88,8 +88,8 @@ struct list_event_system { #define HAS_SECTIONS(H) ((H)->file_version >= FILE_VERSION_SECTIONS) -static stsize_t -do_write_check(struct tracecmd_output *handle, const void *data, tsize_t size) +__hidden long long +do_write_check(struct tracecmd_output *handle, const void *data, long long size) { if (handle->do_compress) return tracecmd_compress_write(handle->compress, data, size); @@ -2490,7 +2490,7 @@ struct tracecmd_output *tracecmd_copy(struct tracecmd_input *ihandle, goto out_free; tracecmd_output_write_init(handle); - if (tracecmd_copy_headers(ihandle, handle->fd, 0, 0) < 0) + if (tracecmd_copy_headers(ihandle, handle, 0, 0) < 0) goto out_free; handle->file_state = tracecmd_get_file_state(ihandle);

[v2,1/8] trace-cmd library: Use output handler when copying data from input file

Commit Message

Patch