[PATCH 02/17] perf data: Add global path holder

From: Jiri Olsa
Date: Thu Feb 21 2019 - 04:43:48 EST

Adding path to the struct perf_data. It will keep the
configured path for the data (const char*). The path
in struct perf_data_file is now dynamically allocated
(duped) from it.

This scheme is useful/used in following patches where
struct perf_data::path holds the 'configure' directory
path and struct perf_data_file::path holds the allocated
path for specific files.

Also it actually makes the code little simpler.

Link: http://lkml.kernel.org/n/tip-ww4tdzfaub4vlv9xxkxvwx9q@xxxxxxxxxxxxxx
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
---
tools/perf/builtin-annotate.c | 4 +--
tools/perf/builtin-buildid-cache.c | 4 +--
tools/perf/builtin-buildid-list.c | 8 +++---
tools/perf/builtin-c2c.c | 4 +--
tools/perf/builtin-diff.c | 12 ++++-----
tools/perf/builtin-evlist.c | 4 +--
tools/perf/builtin-inject.c | 10 +++-----
tools/perf/builtin-kmem.c | 2 +-
tools/perf/builtin-kvm.c | 8 +++---
tools/perf/builtin-lock.c | 8 +++---
tools/perf/builtin-mem.c | 8 +++---
tools/perf/builtin-record.c | 6 ++---
tools/perf/builtin-report.c | 6 ++---
tools/perf/builtin-sched.c | 16 +++++-------
tools/perf/builtin-script.c | 12 ++++-----
tools/perf/builtin-stat.c | 6 ++---
tools/perf/builtin-timechart.c | 8 +++---
tools/perf/builtin-trace.c | 8 +++---
tools/perf/util/data-convert-bt.c | 2 +-
tools/perf/util/data.c | 39 +++++++++++++++++++++---------
tools/perf/util/data.h | 3 ++-
21 files changed, 86 insertions(+), 92 deletions(-)

diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index 7f3c3fea67b4..67f9d9ffacfb 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -441,7 +441,7 @@ static int __cmd_annotate(struct perf_annotate *ann)
}

if (total_nr_samples == 0) {
- ui__error("The %s file has no samples!\n", session->data->file.path);
+ ui__error("The %s data has no samples!\n", session->data->path);
goto out;
}

@@ -578,7 +578,7 @@ int cmd_annotate(int argc, const char **argv)
if (quiet)
perf_quiet_option();

- data.file.path = input_name;
+ data.path = input_name;

annotate.session = perf_session__new(&data, false, &annotate.tool);
if (annotate.session == NULL)
diff --git a/tools/perf/builtin-buildid-cache.c b/tools/perf/builtin-buildid-cache.c
index 115110a4796a..10457b10e568 100644
--- a/tools/perf/builtin-buildid-cache.c
+++ b/tools/perf/builtin-buildid-cache.c
@@ -416,8 +416,8 @@ int cmd_buildid_cache(int argc, const char **argv)
nsi = nsinfo__new(ns_id);

if (missing_filename) {
- data.file.path = missing_filename;
- data.force = force;
+ data.path = missing_filename;
+ data.force = force;

session = perf_session__new(&data, false, NULL);
if (session == NULL)
diff --git a/tools/perf/builtin-buildid-list.c b/tools/perf/builtin-buildid-list.c
index 78abbe8d9d5f..f403e19488b5 100644
--- a/tools/perf/builtin-buildid-list.c
+++ b/tools/perf/builtin-buildid-list.c
@@ -52,11 +52,9 @@ static int perf_session__list_build_ids(bool force, bool with_hits)
{
struct perf_session *session;
struct perf_data data = {
- .file = {
- .path = input_name,
- },
- .mode = PERF_DATA_MODE_READ,
- .force = force,
+ .path = input_name,
+ .mode = PERF_DATA_MODE_READ,
+ .force = force,
};

symbol__elf_init();
diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index efaaab23c6fd..4272763a5e96 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -2750,8 +2750,8 @@ static int perf_c2c__report(int argc, const char **argv)
if (!input_name || !strlen(input_name))
input_name = "perf.data";

- data.file.path = input_name;
- data.force = symbol_conf.force;
+ data.path = input_name;
+ data.force = symbol_conf.force;

err = setup_display(display);
if (err)
diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index 751e1971456b..58fe0e88215c 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -708,7 +708,7 @@ static void data__fprintf(void)

data__for_each_file(i, d)
fprintf(stdout, "# [%d] %s %s\n",
- d->idx, d->data.file.path,
+ d->idx, d->data.path,
!d->idx ? "(Baseline)" : "");

fprintf(stdout, "#\n");
@@ -779,14 +779,14 @@ static int __cmd_diff(void)
data__for_each_file(i, d) {
d->session = perf_session__new(&d->data, false, &tool);
if (!d->session) {
- pr_err("Failed to open %s\n", d->data.file.path);
+ pr_err("Failed to open %s\n", d->data.path);
ret = -1;
goto out_delete;
}

ret = perf_session__process_events(d->session);
if (ret) {
- pr_err("Failed to process %s\n", d->data.file.path);
+ pr_err("Failed to process %s\n", d->data.path);
goto out_delete;
}

@@ -1289,9 +1289,9 @@ static int data_init(int argc, const char **argv)
data__for_each_file(i, d) {
struct perf_data *data = &d->data;

- data->file.path = use_default ? defaults[i] : argv[i];
- data->mode = PERF_DATA_MODE_READ,
- data->force = force,
+ data->path = use_default ? defaults[i] : argv[i];
+ data->mode = PERF_DATA_MODE_READ,
+ data->force = force,

d->idx = i;
}
diff --git a/tools/perf/builtin-evlist.c b/tools/perf/builtin-evlist.c
index e06e822ce634..6e4f63b0da4a 100644
--- a/tools/perf/builtin-evlist.c
+++ b/tools/perf/builtin-evlist.c
@@ -23,9 +23,7 @@ static int __cmd_evlist(const char *file_name, struct perf_attr_details *details
struct perf_session *session;
struct perf_evsel *pos;
struct perf_data data = {
- .file = {
- .path = file_name,
- },
+ .path = file_name,
.mode = PERF_DATA_MODE_READ,
.force = details->force,
};
diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c
index 9bb1f35d5cb7..24086b7f1b14 100644
--- a/tools/perf/builtin-inject.c
+++ b/tools/perf/builtin-inject.c
@@ -770,10 +770,8 @@ int cmd_inject(int argc, const char **argv)
.input_name = "-",
.samples = LIST_HEAD_INIT(inject.samples),
.output = {
- .file = {
- .path = "-",
- },
- .mode = PERF_DATA_MODE_WRITE,
+ .path = "-",
+ .mode = PERF_DATA_MODE_WRITE,
},
};
struct perf_data data = {
@@ -786,7 +784,7 @@ int cmd_inject(int argc, const char **argv)
"Inject build-ids into the output stream"),
OPT_STRING('i', "input", &inject.input_name, "file",
"input file name"),
- OPT_STRING('o', "output", &inject.output.file.path, "file",
+ OPT_STRING('o', "output", &inject.output.path, "file",
"output file name"),
OPT_BOOLEAN('s', "sched-stat", &inject.sched_stat,
"Merge sched-stat and sched-switch for getting events "
@@ -834,7 +832,7 @@ int cmd_inject(int argc, const char **argv)

inject.tool.ordered_events = inject.sched_stat;

- data.file.path = inject.input_name;
+ data.path = inject.input_name;
inject.session = perf_session__new(&data, true, &inject.tool);
if (inject.session == NULL)
return -1;
diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c
index b80ec0883537..fa520f4b8095 100644
--- a/tools/perf/builtin-kmem.c
+++ b/tools/perf/builtin-kmem.c
@@ -1949,7 +1949,7 @@ int cmd_kmem(int argc, const char **argv)
return __cmd_record(argc, argv);
}

- data.file.path = input_name;
+ data.path = input_name;

kmem_session = session = perf_session__new(&data, false, &perf_kmem);
if (session == NULL)
diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 3d4cbc4e87c7..dbb6f737a3e2 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -1080,11 +1080,9 @@ static int read_events(struct perf_kvm_stat *kvm)
.ordered_events = true,
};
struct perf_data file = {
- .file = {
- .path = kvm->file_name,
- },
- .mode = PERF_DATA_MODE_READ,
- .force = kvm->force,
+ .path = kvm->file_name,
+ .mode = PERF_DATA_MODE_READ,
+ .force = kvm->force,
};

kvm->tool = eops;
diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
index 6e0189df2b3b..b9810a8d350a 100644
--- a/tools/perf/builtin-lock.c
+++ b/tools/perf/builtin-lock.c
@@ -866,11 +866,9 @@ static int __cmd_report(bool display_info)
.ordered_events = true,
};
struct perf_data data = {
- .file = {
- .path = input_name,
- },
- .mode = PERF_DATA_MODE_READ,
- .force = force,
+ .path = input_name,
+ .mode = PERF_DATA_MODE_READ,
+ .force = force,
};

session = perf_session__new(&data, false, &eops);
diff --git a/tools/perf/builtin-mem.c b/tools/perf/builtin-mem.c
index ba7e8d87dec3..f45c8b502f63 100644
--- a/tools/perf/builtin-mem.c
+++ b/tools/perf/builtin-mem.c
@@ -239,11 +239,9 @@ static int process_sample_event(struct perf_tool *tool,
static int report_raw_events(struct perf_mem *mem)
{
struct perf_data data = {
- .file = {
- .path = input_name,
- },
- .mode = PERF_DATA_MODE_READ,
- .force = mem->force,
+ .path = input_name,
+ .mode = PERF_DATA_MODE_READ,
+ .force = mem->force,
};
int ret;
struct perf_session *session = perf_session__new(&data, false,
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index e5e9900c9039..f3f7f3100336 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -918,7 +918,7 @@ record__switch_output(struct record *rec, bool at_exit)

if (!quiet)
fprintf(stderr, "[ perf record: Dump %s.%s ]\n",
- data->file.path, timestamp);
+ data->path, timestamp);

/* Output tracking events */
if (!at_exit) {
@@ -1461,7 +1461,7 @@ static int __cmd_record(struct record *rec, int argc, const char **argv)

fprintf(stderr, "[ perf record: Captured and wrote %.3f MB %s%s%s ]\n",
perf_data__size(data) / 1024.0 / 1024.0,
- data->file.path, postfix, samples);
+ data->path, postfix, samples);
}

out_delete_session:
@@ -1862,7 +1862,7 @@ static struct option __record_options[] = {
OPT_STRING('C', "cpu", &record.opts.target.cpu_list, "cpu",
"list of cpus to monitor"),
OPT_U64('c', "count", &record.opts.user_interval, "event period to sample"),
- OPT_STRING('o', "output", &record.data.file.path, "file",
+ OPT_STRING('o', "output", &record.data.path, "file",
"output file name"),
OPT_BOOLEAN_SET('i', "no-inherit", &record.opts.no_inherit,
&record.opts.no_inherit_set,
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 2e8c74d6430c..1532ebde6c4b 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -899,7 +899,7 @@ static int __cmd_report(struct report *rep)
rep->nr_entries += evsel__hists(pos)->nr_entries;

if (rep->nr_entries == 0) {
- ui__error("The %s file has no samples!\n", data->file.path);
+ ui__error("The %s data has no samples!\n", data->path);
return 0;
}

@@ -1207,8 +1207,8 @@ int cmd_report(int argc, const char **argv)
input_name = "perf.data";
}

- data.file.path = input_name;
- data.force = symbol_conf.force;
+ data.path = input_name;
+ data.force = symbol_conf.force;

repeat:
session = perf_session__new(&data, false, &report.tool);
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index 640558e9352e..275f2d92a7bf 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -1785,11 +1785,9 @@ static int perf_sched__read_events(struct perf_sched *sched)
};
struct perf_session *session;
struct perf_data data = {
- .file = {
- .path = input_name,
- },
- .mode = PERF_DATA_MODE_READ,
- .force = sched->force,
+ .path = input_name,
+ .mode = PERF_DATA_MODE_READ,
+ .force = sched->force,
};
int rc = -1;

@@ -2958,11 +2956,9 @@ static int perf_sched__timehist(struct perf_sched *sched)
{ "sched:sched_migrate_task", timehist_migrate_task_event, },
};
struct perf_data data = {
- .file = {
- .path = input_name,
- },
- .mode = PERF_DATA_MODE_READ,
- .force = sched->force,
+ .path = input_name,
+ .mode = PERF_DATA_MODE_READ,
+ .force = sched->force,
};

struct perf_session *session;
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 373ea151dc60..5b1543f42290 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -2951,10 +2951,8 @@ int find_scripts(char **scripts_array, char **scripts_path_array)
DIR *scripts_dir, *lang_dir;
struct perf_session *session;
struct perf_data data = {
- .file = {
- .path = input_name,
- },
- .mode = PERF_DATA_MODE_READ,
+ .path = input_name,
+ .mode = PERF_DATA_MODE_READ,
};
char *temp;
int i = 0;
@@ -3427,8 +3425,8 @@ int cmd_script(int argc, const char **argv)
argc = parse_options_subcommand(argc, argv, options, script_subcommands, script_usage,
PARSE_OPT_STOP_AT_NON_OPTION);

- data.file.path = input_name;
- data.force = symbol_conf.force;
+ data.path = input_name;
+ data.force = symbol_conf.force;

if (argc > 1 && !strncmp(argv[0], "rec", strlen("rec"))) {
rec_script_path = get_script_path(argv[1], RECORD_SUFFIX);
@@ -3654,7 +3652,7 @@ int cmd_script(int argc, const char **argv)
goto out_delete;
}

- input = open(data.file.path, O_RDONLY); /* input_name */
+ input = open(data.path, O_RDONLY); /* input_name */
if (input < 0) {
err = -errno;
perror("failed to open file");
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index bb24f9c17f9a..7b8f09b0b8bf 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -1322,7 +1322,7 @@ static int __cmd_record(int argc, const char **argv)
PARSE_OPT_STOP_AT_NON_OPTION);

if (output_name)
- data->file.path = output_name;
+ data->path = output_name;

if (stat_config.run_count != 1 || forever) {
pr_err("Cannot use -r option with perf stat record.\n");
@@ -1523,8 +1523,8 @@ static int __cmd_report(int argc, const char **argv)
input_name = "perf.data";
}

- perf_stat.data.file.path = input_name;
- perf_stat.data.mode = PERF_DATA_MODE_READ;
+ perf_stat.data.path = input_name;
+ perf_stat.data.mode = PERF_DATA_MODE_READ;

session = perf_session__new(&perf_stat.data, false, &perf_stat.tool);
if (session == NULL)
diff --git a/tools/perf/builtin-timechart.c b/tools/perf/builtin-timechart.c
index 775b99833e51..9b98687a27b9 100644
--- a/tools/perf/builtin-timechart.c
+++ b/tools/perf/builtin-timechart.c
@@ -1602,11 +1602,9 @@ static int __cmd_timechart(struct timechart *tchart, const char *output_name)
{ "syscalls:sys_exit_select", process_exit_poll },
};
struct perf_data data = {
- .file = {
- .path = input_name,
- },
- .mode = PERF_DATA_MODE_READ,
- .force = tchart->force,
+ .path = input_name,
+ .mode = PERF_DATA_MODE_READ,
+ .force = tchart->force,
};

struct perf_session *session = perf_session__new(&data, false,
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 1a11fe656afc..f5b3a1e9c1dd 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -3154,11 +3154,9 @@ static int trace__replay(struct trace *trace)
{ "probe:vfs_getname", trace__vfs_getname, },
};
struct perf_data data = {
- .file = {
- .path = input_name,
- },
- .mode = PERF_DATA_MODE_READ,
- .force = trace->force,
+ .path = input_name,
+ .mode = PERF_DATA_MODE_READ,
+ .force = trace->force,
};
struct perf_session *session;
struct perf_evsel *evsel;
diff --git a/tools/perf/util/data-convert-bt.c b/tools/perf/util/data-convert-bt.c
index 2a36fab76994..ea742a254aa5 100644
--- a/tools/perf/util/data-convert-bt.c
+++ b/tools/perf/util/data-convert-bt.c
@@ -1650,7 +1650,7 @@ int bt_convert__perf2ctf(const char *input, const char *path,

fprintf(stderr,
"[ perf data convert: Converted '%s' into CTF data '%s' ]\n",
- data.file.path, path);
+ data.path, path);

fprintf(stderr,
"[ perf data convert: Converted and wrote %.3f MB (%" PRIu64 " samples",
diff --git a/tools/perf/util/data.c b/tools/perf/util/data.c
index 09eceda17fc2..e16d06ed1100 100644
--- a/tools/perf/util/data.c
+++ b/tools/perf/util/data.c
@@ -19,11 +19,11 @@ static bool check_pipe(struct perf_data *data)
int fd = perf_data__is_read(data) ?
STDIN_FILENO : STDOUT_FILENO;

- if (!data->file.path) {
+ if (!data->path) {
if (!fstat(fd, &st) && S_ISFIFO(st.st_mode))
is_pipe = true;
} else {
- if (!strcmp(data->file.path, "-"))
+ if (!strcmp(data->path, "-"))
is_pipe = true;
}

@@ -37,13 +37,13 @@ static int check_backup(struct perf_data *data)
{
struct stat st;

- if (!stat(data->file.path, &st) && st.st_size) {
+ if (!stat(data->path, &st) && st.st_size) {
/* TODO check errors properly */
char oldname[PATH_MAX];
snprintf(oldname, sizeof(oldname), "%s.old",
- data->file.path);
+ data->path);
unlink(oldname);
- rename(data->file.path, oldname);
+ rename(data->path, oldname);
}

return 0;
@@ -115,8 +115,22 @@ static int open_file(struct perf_data *data)
fd = perf_data__is_read(data) ?
open_file_read(data) : open_file_write(data);

+ if (fd < 0) {
+ free(data->file.path);
+ return -1;
+ }
+
data->file.fd = fd;
- return fd < 0 ? -1 : 0;
+ return 0;
+}
+
+static int open_file_dup(struct perf_data *data)
+{
+ data->file.path = strdup(data->path);
+ if (!data->file.path)
+ return -ENOMEM;
+
+ return open_file(data);
}

int perf_data__open(struct perf_data *data)
@@ -124,14 +138,15 @@ int perf_data__open(struct perf_data *data)
if (check_pipe(data))
return 0;

- if (!data->file.path)
- data->file.path = "perf.data";
+ if (!data->path)
+ data->path = "perf.data";

- return open_file(data);
+ return open_file_dup(data);
}

void perf_data__close(struct perf_data *data)
{
+ free(data->file.path);
close(data->file.fd);
}

@@ -159,15 +174,15 @@ int perf_data__switch(struct perf_data *data,
if (perf_data__is_read(data))
return -EINVAL;

- if (asprintf(&new_filepath, "%s.%s", data->file.path, postfix) < 0)
+ if (asprintf(&new_filepath, "%s.%s", data->path, postfix) < 0)
return -ENOMEM;

/*
* Only fire a warning, don't return error, continue fill
* original file.
*/
- if (rename(data->file.path, new_filepath))
- pr_warning("Failed to rename %s to %s\n", data->file.path, new_filepath);
+ if (rename(data->path, new_filepath))
+ pr_warning("Failed to rename %s to %s\n", data->path, new_filepath);

if (!at_exit) {
close(data->file.fd);
diff --git a/tools/perf/util/data.h b/tools/perf/util/data.h
index 85f9c0dbf982..2bce28117ccf 100644
--- a/tools/perf/util/data.h
+++ b/tools/perf/util/data.h
@@ -10,12 +10,13 @@ enum perf_data_mode {
};

struct perf_data_file {
- const char *path;
+ char *path;
int fd;
unsigned long size;
};

struct perf_data {
+ const char *path;
struct perf_data_file file;
bool is_pipe;
bool force;
--
2.17.2