[PATCH] perf io: Make open and read calls more robust

From: Ian Rogers
Date: Wed Jun 15 2022 - 02:04:06 EST

Wrap open and read calls with TEMP_FAILURE_RETRY in case a signal
causes the syscall to need to restart.

Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
---
tools/lib/api/io.h | 3 ++-
tools/lib/symbol/kallsyms.c | 4 ++-
tools/perf/builtin-daemon.c | 19 +++++++-------
tools/perf/builtin-ftrace.c | 18 ++++++-------
tools/perf/builtin-inject.c | 2 +-
tools/perf/builtin-kvm.c | 2 +-
tools/perf/builtin-record.c | 6 ++---
tools/perf/builtin-sched.c | 2 +-
tools/perf/builtin-script.c | 2 +-
tools/perf/util/copyfile.c | 2 +-
tools/perf/util/data.c | 11 ++++----
tools/perf/util/dso.c | 6 ++---
tools/perf/util/evlist.c | 6 ++---
tools/perf/util/lzma.c | 4 +--
tools/perf/util/namespaces.c | 5 ++--
tools/perf/util/parse-events.c | 6 ++---
tools/perf/util/pmu.c | 12 ++++-----
tools/perf/util/probe-event.c | 4 +--
tools/perf/util/probe-file.c | 10 ++++----
tools/perf/util/session.c | 2 +-
tools/perf/util/symbol-elf.c | 32 ++++++++++++------------
tools/perf/util/symbol-minimal.c | 6 ++---
tools/perf/util/symbol.c | 4 +--
tools/perf/util/synthetic-events.c | 7 +++---
tools/perf/util/trace-event-info.c | 6 ++---
tools/perf/util/trace-event-read.c | 5 ++--
tools/perf/util/unwind-libunwind-local.c | 4 +--
tools/perf/util/zlib.c | 5 ++--
28 files changed, 102 insertions(+), 93 deletions(-)

diff --git a/tools/lib/api/io.h b/tools/lib/api/io.h
index 777c20f6b604..b292bbd39fb0 100644
--- a/tools/lib/api/io.h
+++ b/tools/lib/api/io.h
@@ -7,6 +7,7 @@
#ifndef __API_IO__
#define __API_IO__

+#include <errno.h>
#include <stdlib.h>
#include <unistd.h>

@@ -45,7 +46,7 @@ static inline int io__get_char(struct io *io)
return -1;

if (ptr == io->end) {
- ssize_t n = read(io->fd, io->buf, io->buf_len);
+ ssize_t n = TEMP_FAILURE_RETRY(read(io->fd, io->buf, io->buf_len));

if (n <= 0) {
io->eof = true;
diff --git a/tools/lib/symbol/kallsyms.c b/tools/lib/symbol/kallsyms.c
index e335ac2b9e19..5436c038c379 100644
--- a/tools/lib/symbol/kallsyms.c
+++ b/tools/lib/symbol/kallsyms.c
@@ -3,7 +3,9 @@
#include "api/io.h"
#include <stdio.h>
#include <sys/stat.h>
+#include <errno.h>
#include <fcntl.h>
+#include <unistd.h>

u8 kallsyms2elf_type(char type)
{
@@ -36,7 +38,7 @@ int kallsyms__parse(const char *filename, void *arg,
char bf[BUFSIZ];
int err;

- io.fd = open(filename, O_RDONLY, 0);
+ io.fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY, 0));

if (io.fd < 0)
return -1;
diff --git a/tools/perf/builtin-daemon.c b/tools/perf/builtin-daemon.c
index 6cb3f6cc36d0..d4e1a5636056 100644
--- a/tools/perf/builtin-daemon.c
+++ b/tools/perf/builtin-daemon.c
@@ -351,7 +351,7 @@ static int daemon_session__run(struct daemon_session *session,
return -1;
}

- fd = open("/dev/null", O_RDONLY);
+ fd = TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
if (fd < 0) {
perror("failed: open /dev/null");
return -1;
@@ -360,7 +360,7 @@ static int daemon_session__run(struct daemon_session *session,
dup2(fd, 0);
close(fd);

- fd = open(SESSION_OUTPUT, O_RDWR|O_CREAT|O_TRUNC, 0644);
+ fd = TEMP_FAILURE_RETRY(open(SESSION_OUTPUT, O_RDWR|O_CREAT|O_TRUNC, 0644));
if (fd < 0) {
perror("failed: open session output");
return -1;
@@ -405,7 +405,8 @@ static pid_t handle_signalfd(struct daemon *daemon)
* coalesced in kernel and we can receive only single signal even
* if multiple SIGCHLD were generated.
*/
- err = read(daemon->signal_fd, &si, sizeof(struct signalfd_siginfo));
+ err = TEMP_FAILURE_RETRY(read(daemon->signal_fd, &si,
+ sizeof(struct signalfd_siginfo)));
if (err != sizeof(struct signalfd_siginfo)) {
pr_err("failed to read signal fd\n");
return -1;
@@ -522,7 +523,7 @@ static int daemon_session__control(struct daemon_session *session,
scnprintf(control_path, sizeof(control_path), "%s/%s",
session->base, SESSION_CONTROL);

- control = open(control_path, O_WRONLY|O_NONBLOCK);
+ control = TEMP_FAILURE_RETRY(open(control_path, O_WRONLY|O_NONBLOCK));
if (!control)
return -1;

@@ -531,7 +532,7 @@ static int daemon_session__control(struct daemon_session *session,
scnprintf(ack_path, sizeof(ack_path), "%s/%s",
session->base, SESSION_ACK);

- ack = open(ack_path, O_RDONLY, O_NONBLOCK);
+ ack = TEMP_FAILURE_RETRY(open(ack_path, O_RDONLY, O_NONBLOCK));
if (!ack) {
close(control);
return -1;
@@ -564,7 +565,7 @@ static int daemon_session__control(struct daemon_session *session,
goto out;
}

- err = read(ack, buf, sizeof(buf));
+ err = TEMP_FAILURE_RETRY(read(ack, buf, sizeof(buf)));
if (err > 0)
ret = strcmp(buf, "ack\n");
else
@@ -1078,7 +1079,7 @@ static int handle_config_changes(struct daemon *daemon, int conf_fd,
ssize_t len;

while (!(*config_changed)) {
- len = read(conf_fd, buf, sizeof(buf));
+ len = TEMP_FAILURE_RETRY(read(conf_fd, buf, sizeof(buf)));
if (len == -1) {
if (errno != EAGAIN) {
perror("failed: read");
@@ -1147,7 +1148,7 @@ static int check_lock(struct daemon *daemon)

scnprintf(path, sizeof(path), "%s/lock", daemon->base);

- fd = open(path, O_RDWR|O_CREAT|O_CLOEXEC, 0640);
+ fd = TEMP_FAILURE_RETRY(open(path, O_RDWR|O_CREAT|O_CLOEXEC, 0640));
if (fd < 0)
return -1;

@@ -1201,7 +1202,7 @@ static int go_background(struct daemon *daemon)
return -1;
}

- fd = open("output", O_RDWR|O_CREAT|O_TRUNC, 0644);
+ fd = TEMP_FAILURE_RETRY(open("output", O_RDWR|O_CREAT|O_TRUNC, 0644));
if (fd < 0) {
perror("failed: open");
return -1;
diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c
index 7de07bb16d23..7553e20f38b2 100644
--- a/tools/perf/builtin-ftrace.c
+++ b/tools/perf/builtin-ftrace.c
@@ -79,7 +79,7 @@ static int __write_tracing_file(const char *name, const char *val, bool append)
else
flags |= O_TRUNC;

- fd = open(file, flags);
+ fd = TEMP_FAILURE_RETRY(open(file, flags));
if (fd < 0) {
pr_debug("cannot open tracing file: %s: %s\n",
name, str_error_r(errno, errbuf, sizeof(errbuf)));
@@ -132,7 +132,7 @@ static int read_tracing_file_to_stdout(const char *name)
return -1;
}

- fd = open(file, O_RDONLY);
+ fd = TEMP_FAILURE_RETRY(open(file, O_RDONLY));
if (fd < 0) {
pr_debug("cannot open tracing file: %s: %s\n",
name, str_error_r(errno, buf, sizeof(buf)));
@@ -141,7 +141,7 @@ static int read_tracing_file_to_stdout(const char *name)

/* read contents to stdout */
while (true) {
- int n = read(fd, buf, sizeof(buf));
+ int n = TEMP_FAILURE_RETRY(read(fd, buf, sizeof(buf)));
if (n == 0)
break;
else if (n < 0)
@@ -608,7 +608,7 @@ static int __cmd_ftrace(struct perf_ftrace *ftrace)
goto out_reset;
}

- trace_fd = open(trace_file, O_RDONLY);
+ trace_fd = TEMP_FAILURE_RETRY(open(trace_file, O_RDONLY));

put_tracing_file(trace_file);

@@ -645,7 +645,7 @@ static int __cmd_ftrace(struct perf_ftrace *ftrace)
break;

if (pollfd.revents & POLLIN) {
- int n = read(trace_fd, buf, sizeof(buf));
+ int n = TEMP_FAILURE_RETRY(read(trace_fd, buf, sizeof(buf)));
if (n < 0)
break;
if (fwrite(buf, n, 1, stdout) != 1)
@@ -665,7 +665,7 @@ static int __cmd_ftrace(struct perf_ftrace *ftrace)

/* read remaining buffer contents */
while (true) {
- int n = read(trace_fd, buf, sizeof(buf));
+ int n = TEMP_FAILURE_RETRY(read(trace_fd, buf, sizeof(buf)));
if (n <= 0)
break;
if (fwrite(buf, n, 1, stdout) != 1)
@@ -826,7 +826,7 @@ static int prepare_func_latency(struct perf_ftrace *ftrace)
return -1;
}

- fd = open(trace_file, O_RDONLY);
+ fd = TEMP_FAILURE_RETRY(open(trace_file, O_RDONLY));
if (fd < 0)
pr_err("failed to open trace_pipe\n");

@@ -913,7 +913,7 @@ static int __cmd_latency(struct perf_ftrace *ftrace)
break;

if (pollfd.revents & POLLIN) {
- int n = read(trace_fd, buf, sizeof(buf) - 1);
+ int n = TEMP_FAILURE_RETRY(read(trace_fd, buf, sizeof(buf) - 1));
if (n < 0)
break;

@@ -931,7 +931,7 @@ static int __cmd_latency(struct perf_ftrace *ftrace)

/* read remaining buffer contents */
while (!ftrace->target.use_bpf) {
- int n = read(trace_fd, buf, sizeof(buf) - 1);
+ int n = TEMP_FAILURE_RETRY(read(trace_fd, buf, sizeof(buf) - 1));
if (n <= 0)
break;
make_histogram(buckets, buf, n, line, ftrace->use_nsec);
diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c
index a75bf11585b5..960b4a50583e 100644
--- a/tools/perf/builtin-inject.c
+++ b/tools/perf/builtin-inject.c
@@ -155,7 +155,7 @@ static int copy_bytes(struct perf_inject *inject, int fd, off_t size)
int ret;

while (size > 0) {
- ssz = read(fd, buf, min(size, (off_t)sizeof(buf)));
+ ssz = TEMP_FAILURE_RETRY(read(fd, buf, min(size, (off_t)sizeof(buf))));
if (ssz < 0)
return -errno;
ret = output_bytes(inject, buf, ssz);
diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 3696ae97f149..4dd8292d1941 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -880,7 +880,7 @@ static int perf_kvm__handle_timerfd(struct perf_kvm_stat *kvm)
uint64_t c;
int rc;

- rc = read(kvm->timerfd, &c, sizeof(uint64_t));
+ rc = TEMP_FAILURE_RETRY(read(kvm->timerfd, &c, sizeof(uint64_t)));
if (rc < 0) {
if (errno == EAGAIN)
return 0;
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 9a71f0330137..361610bc96b6 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -902,7 +902,7 @@ static bool record__kcore_readable(struct machine *machine)

scnprintf(kcore, sizeof(kcore), "%s/proc/kcore", machine->root_dir);

- fd = open(kcore, O_RDONLY);
+ fd = TEMP_FAILURE_RETRY(open(kcore, O_RDONLY));
if (fd < 0)
return false;

@@ -2049,7 +2049,7 @@ static int record__terminate_thread(struct record_thread *thread_data)

close(thread_data->pipes.msg[1]);
thread_data->pipes.msg[1] = -1;
- err = read(thread_data->pipes.ack[0], &ack, sizeof(ack));
+ err = TEMP_FAILURE_RETRY(read(thread_data->pipes.ack[0], &ack, sizeof(ack)));
if (err > 0)
pr_debug2("threads[%d]: sent %s\n", tid, thread_msg_tags[ack]);
else
@@ -2097,7 +2097,7 @@ static int record__start_threads(struct record *rec)
goto out_err;
}

- err = read(thread_data[t].pipes.ack[0], &msg, sizeof(msg));
+ err = TEMP_FAILURE_RETRY(read(thread_data[t].pipes.ack[0], &msg, sizeof(msg)));
if (err > 0)
pr_debug2("threads[%d]: sent %s\n", rec->thread_data[t].tid,
thread_msg_tags[msg]);
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index 646bd938927a..149787268d02 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -604,7 +604,7 @@ static u64 get_cpu_usage_nsec_self(int fd)
u64 runtime;
int ret;

- ret = read(fd, &runtime, sizeof(runtime));
+ ret = TEMP_FAILURE_RETRY(read(fd, &runtime, sizeof(runtime)));
BUG_ON(ret != sizeof(runtime));

return runtime;
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index c689054002cc..844f5350bfdf 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -4207,7 +4207,7 @@ int cmd_script(int argc, const char **argv)
goto out_delete;
}

- input = open(data.path, O_RDONLY); /* input_name */
+ input = TEMP_FAILURE_RETRY(open(data.path, O_RDONLY)); /* input_name */
if (input < 0) {
err = -errno;
perror("failed to open file");
diff --git a/tools/perf/util/copyfile.c b/tools/perf/util/copyfile.c
index 47e03de7c235..c7bff4943936 100644
--- a/tools/perf/util/copyfile.c
+++ b/tools/perf/util/copyfile.c
@@ -112,7 +112,7 @@ static int copyfile_mode_ns(const char *from, const char *to, mode_t mode,
goto out_close_to;

nsinfo__mountns_enter(nsi, &nsc);
- fromfd = open(from, O_RDONLY);
+ fromfd = TEMP_FAILURE_RETRY(open(from, O_RDONLY));
nsinfo__mountns_exit(&nsc);
if (fromfd < 0)
goto out_close_to;
diff --git a/tools/perf/util/data.c b/tools/perf/util/data.c
index caabeac24c69..a9066a3d914f 100644
--- a/tools/perf/util/data.c
+++ b/tools/perf/util/data.c
@@ -53,7 +53,8 @@ int perf_data__create_dir(struct perf_data *data, int nr)
goto out_err;
}

- ret = open(file->path, O_RDWR|O_CREAT|O_TRUNC, S_IRUSR|S_IWUSR);
+ ret = TEMP_FAILURE_RETRY(open(file->path, O_RDWR|O_CREAT|O_TRUNC,
+ S_IRUSR|S_IWUSR));
if (ret < 0) {
ret = -errno;
goto out_err;
@@ -123,7 +124,7 @@ int perf_data__open_dir(struct perf_data *data)
if (!file->path)
goto out_err;

- ret = open(file->path, O_RDONLY);
+ ret = TEMP_FAILURE_RETRY(open(file->path, O_RDONLY));
if (ret < 0)
goto out_err;

@@ -248,7 +249,7 @@ static int open_file_read(struct perf_data *data)
int fd;
char sbuf[STRERR_BUFSIZE];

- fd = open(data->file.path, flags);
+ fd = TEMP_FAILURE_RETRY(open(data->file.path, flags));
if (fd < 0) {
int err = errno;

@@ -288,8 +289,8 @@ static int open_file_write(struct perf_data *data)
int fd;
char sbuf[STRERR_BUFSIZE];

- fd = open(data->file.path, O_CREAT|O_RDWR|O_TRUNC|O_CLOEXEC,
- S_IRUSR|S_IWUSR);
+ fd = TEMP_FAILURE_RETRY(open(data->file.path, O_CREAT|O_RDWR|O_TRUNC|O_CLOEXEC,
+ S_IRUSR|S_IWUSR));

if (fd < 0)
pr_err("failed to open %s : %s\n", data->file.path,
diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index 5ac13958d1bd..40befa2429f9 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -300,7 +300,7 @@ int filename__decompress(const char *name, char *pathname,
* descriptor to the uncompressed file.
*/
if (!compressions[comp].is_compressed(name))
- return open(name, O_RDONLY);
+ return TEMP_FAILURE_RETRY(open(name, O_RDONLY));

fd = mkstemp(tmpbuf);
if (fd < 0) {
@@ -476,7 +476,7 @@ static int do_open(char *name)
char sbuf[STRERR_BUFSIZE];

do {
- fd = open(name, O_RDONLY|O_CLOEXEC);
+ fd = TEMP_FAILURE_RETRY(open(name, O_RDONLY|O_CLOEXEC));
if (fd >= 0)
return fd;

@@ -898,7 +898,7 @@ static ssize_t file_read(struct dso *dso, struct machine *machine,
goto out;
}

- ret = pread(dso->data.fd, data, DSO__DATA_CACHE_SIZE, offset);
+ ret = TEMP_FAILURE_RETRY(pread(dso->data.fd, data, DSO__DATA_CACHE_SIZE, offset));
out:
pthread_mutex_unlock(&dso__data_open_lock);
return ret;
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 48af7d379d82..ba0dcdf91120 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -1440,7 +1440,7 @@ int evlist__prepare_workload(struct evlist *evlist, struct target *target, const
/*
* Wait until the parent tells us to go.
*/
- ret = read(go_pipe[0], &bf, 1);
+ ret = TEMP_FAILURE_RETRY(read(go_pipe[0], &bf, 1));
/*
* The parent will ask for the execvp() to be performed by
* writing exactly one byte, in workload.cork_fd, usually via
@@ -1837,7 +1837,7 @@ static int evlist__parse_control_fifo(const char *str, int *ctl_fd, int *ctl_fd_
* O_RDWR avoids POLLHUPs which is necessary to allow the other
* end of a FIFO to be repeatedly opened and closed.
*/
- fd = open(s, O_RDWR | O_NONBLOCK | O_CLOEXEC);
+ fd = TEMP_FAILURE_RETRY(open(s, O_RDWR | O_NONBLOCK | O_CLOEXEC));
if (fd < 0) {
pr_err("Failed to open '%s'\n", s);
ret = -errno;
@@ -1848,7 +1848,7 @@ static int evlist__parse_control_fifo(const char *str, int *ctl_fd, int *ctl_fd_

if (p && *++p) {
/* O_RDWR | O_NONBLOCK means the other end need not be open */
- fd = open(p, O_RDWR | O_NONBLOCK | O_CLOEXEC);
+ fd = TEMP_FAILURE_RETRY(open(p, O_RDWR | O_NONBLOCK | O_CLOEXEC));
if (fd < 0) {
pr_err("Failed to open '%s'\n", p);
ret = -errno;
diff --git a/tools/perf/util/lzma.c b/tools/perf/util/lzma.c
index 51424cdc3b68..93e0a6a53e28 100644
--- a/tools/perf/util/lzma.c
+++ b/tools/perf/util/lzma.c
@@ -109,7 +109,7 @@ int lzma_decompress_to_file(const char *input, int output_fd)

bool lzma_is_compressed(const char *input)
{
- int fd = open(input, O_RDONLY);
+ int fd = TEMP_FAILURE_RETRY(open(input, O_RDONLY));
const uint8_t magic[6] = { 0xFD, '7', 'z', 'X', 'Z', 0x00 };
char buf[6] = { 0 };
ssize_t rc;
@@ -117,7 +117,7 @@ bool lzma_is_compressed(const char *input)
if (fd < 0)
return -1;

- rc = read(fd, buf, sizeof(buf));
+ rc = TEMP_FAILURE_RETRY(read(fd, buf, sizeof(buf)));
close(fd);
return rc == sizeof(buf) ?
memcmp(buf, magic, sizeof(buf)) == 0 : false;
diff --git a/tools/perf/util/namespaces.c b/tools/perf/util/namespaces.c
index dd536220cdb9..89edfba6af06 100644
--- a/tools/perf/util/namespaces.c
+++ b/tools/perf/util/namespaces.c
@@ -9,6 +9,7 @@
#include "get_current_dir_name.h"
#include <sys/types.h>
#include <sys/stat.h>
+#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <sched.h>
@@ -266,11 +267,11 @@ void nsinfo__mountns_enter(struct nsinfo *nsi,
if (!oldcwd)
return;

- oldns = open(curpath, O_RDONLY);
+ oldns = TEMP_FAILURE_RETRY(open(curpath, O_RDONLY));
if (oldns < 0)
goto errout;

- newns = open(nsi->mntns_path, O_RDONLY);
+ newns = TEMP_FAILURE_RETRY(open(nsi->mntns_path, O_RDONLY));
if (newns < 0)
goto errout;

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 7ed235740431..75f8f2e44195 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -189,7 +189,7 @@ static int tp_event_has_id(const char *dir_path, struct dirent *evt_dir)
int fd;

snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path, evt_dir->d_name);
- fd = open(evt_path, O_RDONLY);
+ fd = TEMP_FAILURE_RETRY(open(evt_path, O_RDONLY));
if (fd < 0)
return -EINVAL;
close(fd);
@@ -233,10 +233,10 @@ struct tracepoint_path *tracepoint_id_to_path(u64 config)

scnprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
evt_dirent->d_name);
- fd = open(evt_path, O_RDONLY);
+ fd = TEMP_FAILURE_RETRY(open(evt_path, O_RDONLY));
if (fd < 0)
continue;
- if (read(fd, id_buf, sizeof(id_buf)) < 0) {
+ if (TEMP_FAILURE_RETRY(read(fd, id_buf, sizeof(id_buf))) < 0) {
close(fd);
continue;
}
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 9a1c7e63e663..59252cfc2b5b 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -154,14 +154,14 @@ static int perf_pmu__parse_scale(struct perf_pmu_alias *alias, char *dir, char *

scnprintf(path, PATH_MAX, "%s/%s.scale", dir, name);

- fd = open(path, O_RDONLY);
+ fd = TEMP_FAILURE_RETRY(open(path, O_RDONLY));
if (fd == -1)
return -1;

if (fstat(fd, &st) < 0)
goto error;

- sret = read(fd, scale, sizeof(scale)-1);
+ sret = TEMP_FAILURE_RETRY(read(fd, scale, sizeof(scale)-1));
if (sret < 0)
goto error;

@@ -184,11 +184,11 @@ static int perf_pmu__parse_unit(struct perf_pmu_alias *alias, char *dir, char *n

scnprintf(path, PATH_MAX, "%s/%s.unit", dir, name);

- fd = open(path, O_RDONLY);
+ fd = TEMP_FAILURE_RETRY(open(path, O_RDONLY));
if (fd == -1)
return -1;

- sret = read(fd, alias->unit, UNIT_MAX_LEN);
+ sret = TEMP_FAILURE_RETRY(read(fd, alias->unit, UNIT_MAX_LEN));
if (sret < 0)
goto error;

@@ -214,7 +214,7 @@ perf_pmu__parse_per_pkg(struct perf_pmu_alias *alias, char *dir, char *name)

scnprintf(path, PATH_MAX, "%s/%s.per-pkg", dir, name);

- fd = open(path, O_RDONLY);
+ fd = TEMP_FAILURE_RETRY(open(path, O_RDONLY));
if (fd == -1)
return -1;

@@ -232,7 +232,7 @@ static int perf_pmu__parse_snapshot(struct perf_pmu_alias *alias,

scnprintf(path, PATH_MAX, "%s/%s.snapshot", dir, name);

- fd = open(path, O_RDONLY);
+ fd = TEMP_FAILURE_RETRY(open(path, O_RDONLY));
if (fd == -1)
return -1;

diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 062b5cbe67af..7838889f55df 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -276,7 +276,7 @@ static char *find_module_name(const char *module)
char *mod_name = NULL;
int name_offset;

- fd = open(module, O_RDONLY);
+ fd = TEMP_FAILURE_RETRY(open(module, O_RDONLY));
if (fd < 0)
return NULL;

@@ -598,7 +598,7 @@ static int get_text_start_address(const char *exec, u64 *address,
struct nscookie nsc;

nsinfo__mountns_enter(nsi, &nsc);
- fd = open(exec, O_RDONLY);
+ fd = TEMP_FAILURE_RETRY(open(exec, O_RDONLY));
nsinfo__mountns_exit(&nsc);
if (fd < 0)
return -errno;
diff --git a/tools/perf/util/probe-file.c b/tools/perf/util/probe-file.c
index 3d50de3217d5..b788932656e8 100644
--- a/tools/perf/util/probe-file.c
+++ b/tools/perf/util/probe-file.c
@@ -115,9 +115,9 @@ int open_trace_file(const char *trace_file, bool readwrite)
if (ret >= 0) {
pr_debug("Opening %s write=%d\n", buf, readwrite);
if (readwrite && !probe_event_dry_run)
- ret = open(buf, O_RDWR | O_APPEND, 0);
+ ret = TEMP_FAILURE_RETRY(open(buf, O_RDWR | O_APPEND, 0));
else
- ret = open(buf, O_RDONLY, 0);
+ ret = TEMP_FAILURE_RETRY(open(buf, O_RDONLY, 0));

if (ret < 0)
ret = -errno;
@@ -180,7 +180,7 @@ struct strlist *probe_file__get_rawlist(int fd)
if (sl == NULL)
return NULL;

- fddup = dup(fd);
+ fddup = TEMP_FAILURE_RETRY(dup(fd));
if (fddup < 0)
goto out_free_sl;

@@ -498,7 +498,7 @@ static int probe_cache__open(struct probe_cache *pcache, const char *target,
}

snprintf(cpath, PATH_MAX, "%s/probes", dir_name);
- fd = open(cpath, O_CREAT | O_RDWR, 0644);
+ fd = TEMP_FAILURE_RETRY(open(cpath, O_CREAT | O_RDWR, 0644));
if (fd < 0)
pr_debug("Failed to open cache(%d): %s\n", fd, cpath);
free(dir_name);
@@ -514,7 +514,7 @@ static int probe_cache__load(struct probe_cache *pcache)
int ret = 0, fddup;
FILE *fp;

- fddup = dup(pcache->fd);
+ fddup = TEMP_FAILURE_RETRY(dup(pcache->fd));
if (fddup < 0)
return -errno;
fp = fdopen(fddup, "r");
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 0acb9de54b06..b2fc389cc530 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -384,7 +384,7 @@ static int skipn(int fd, off_t n)
ssize_t ret;

while (n > 0) {
- ret = read(fd, buf, min(n, (off_t)sizeof(buf)));
+ ret = TEMP_FAILURE_RETRY(read(fd, buf, min(n, (off_t)sizeof(buf))));
if (ret <= 0)
return ret;
n -= ret;
diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c
index ecd377938eea..02556070a2ce 100644
--- a/tools/perf/util/symbol-elf.c
+++ b/tools/perf/util/symbol-elf.c
@@ -577,7 +577,7 @@ static int read_build_id(const char *filename, struct build_id *bid)
if (size < BUILD_ID_SIZE)
goto out;

- fd = open(filename, O_RDONLY);
+ fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
if (fd < 0)
goto out;

@@ -638,7 +638,7 @@ int sysfs__read_build_id(const char *filename, struct build_id *bid)
size_t size = sizeof(bid->data);
int fd, err = -1;

- fd = open(filename, O_RDONLY);
+ fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
if (fd < 0)
goto out;

@@ -647,24 +647,24 @@ int sysfs__read_build_id(const char *filename, struct build_id *bid)
GElf_Nhdr nhdr;
size_t namesz, descsz;

- if (read(fd, &nhdr, sizeof(nhdr)) != sizeof(nhdr))
+ if (TEMP_FAILURE_RETRY(read(fd, &nhdr, sizeof(nhdr))) != sizeof(nhdr))
break;

namesz = NOTE_ALIGN(nhdr.n_namesz);
descsz = NOTE_ALIGN(nhdr.n_descsz);
if (nhdr.n_type == NT_GNU_BUILD_ID &&
nhdr.n_namesz == sizeof("GNU")) {
- if (read(fd, bf, namesz) != (ssize_t)namesz)
+ if (TEMP_FAILURE_RETRY(read(fd, bf, namesz)) != (ssize_t)namesz)
break;
if (memcmp(bf, "GNU", sizeof("GNU")) == 0) {
size_t sz = min(descsz, size);
- if (read(fd, bid->data, sz) == (ssize_t)sz) {
+ if (TEMP_FAILURE_RETRY(read(fd, bid->data, sz)) == (ssize_t)sz) {
memset(bid->data + sz, 0, size - sz);
bid->size = sz;
err = 0;
break;
}
- } else if (read(fd, bf, descsz) != (ssize_t)descsz)
+ } else if (TEMP_FAILURE_RETRY(read(fd, bf, descsz)) != (ssize_t)descsz)
break;
} else {
int n = namesz + descsz;
@@ -674,7 +674,7 @@ int sysfs__read_build_id(const char *filename, struct build_id *bid)
pr_debug("%s: truncating reading of build id in sysfs file %s: n_namesz=%u, n_descsz=%u.\n",
__func__, filename, nhdr.n_namesz, nhdr.n_descsz);
}
- if (read(fd, bf, n) != n)
+ if (TEMP_FAILURE_RETRY(read(fd, bf, n)) != n)
break;
}
}
@@ -732,7 +732,7 @@ int filename__read_debuglink(const char *filename, char *debuglink,
Elf_Scn *sec;
Elf_Kind ek;

- fd = open(filename, O_RDONLY);
+ fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
if (fd < 0)
goto out;

@@ -844,7 +844,7 @@ int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name,

type = dso->symtab_type;
} else {
- fd = open(name, O_RDONLY);
+ fd = TEMP_FAILURE_RETRY(open(name, O_RDONLY));
if (fd < 0) {
dso->load_errno = errno;
return -1;
@@ -1454,7 +1454,7 @@ static int copy_bytes(int from, off_t from_offs, int to, off_t to_offs, u64 len)
if (len < n)
n = len;
/* Use read because mmap won't work on proc files */
- r = read(from, buf, n);
+ r = TEMP_FAILURE_RETRY(read(from, buf, n));
if (r < 0)
goto out;
if (!r)
@@ -1485,7 +1485,7 @@ static int kcore__open(struct kcore *kcore, const char *filename)
{
GElf_Ehdr *ehdr;

- kcore->fd = open(filename, O_RDONLY);
+ kcore->fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
if (kcore->fd == -1)
return -1;

@@ -1518,7 +1518,7 @@ static int kcore__init(struct kcore *kcore, char *filename, int elfclass,
if (temp)
kcore->fd = mkstemp(filename);
else
- kcore->fd = open(filename, O_WRONLY | O_CREAT | O_EXCL, 0400);
+ kcore->fd = TEMP_FAILURE_RETRY(open(filename, O_WRONLY | O_CREAT | O_EXCL, 0400));
if (kcore->fd == -1)
return -1;

@@ -1966,7 +1966,7 @@ static int kcore_copy__compare_fds(int from, int to)

while (1) {
/* Use read because mmap won't work on proc files */
- ret = read(from, buf_from, page_size);
+ ret = TEMP_FAILURE_RETRY(read(from, buf_from, page_size));
if (ret < 0)
goto out;

@@ -1994,11 +1994,11 @@ static int kcore_copy__compare_files(const char *from_filename,
{
int from, to, err = -1;

- from = open(from_filename, O_RDONLY);
+ from = TEMP_FAILURE_RETRY(open(from_filename, O_RDONLY));
if (from < 0)
return -1;

- to = open(to_filename, O_RDONLY);
+ to = TEMP_FAILURE_RETRY(open(to_filename, O_RDONLY));
if (to < 0)
goto out_close_from;

@@ -2419,7 +2419,7 @@ int get_sdt_note_list(struct list_head *head, const char *target)
Elf *elf;
int fd, ret;

- fd = open(target, O_RDONLY);
+ fd = TEMP_FAILURE_RETRY(open(target, O_RDONLY));
if (fd < 0)
return -EBADF;

diff --git a/tools/perf/util/symbol-minimal.c b/tools/perf/util/symbol-minimal.c
index f9eb0bee7f15..7e25d476b1b2 100644
--- a/tools/perf/util/symbol-minimal.c
+++ b/tools/perf/util/symbol-minimal.c
@@ -230,7 +230,7 @@ int sysfs__read_build_id(const char *filename, struct build_id *bid)
size_t buf_size;
void *buf;

- fd = open(filename, O_RDONLY);
+ fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
if (fd < 0)
return -1;

@@ -242,7 +242,7 @@ int sysfs__read_build_id(const char *filename, struct build_id *bid)
if (buf == NULL)
goto out;

- if (read(fd, buf, buf_size) != (ssize_t) buf_size)
+ if (TEMP_FAILURE_RETRY(read(fd, buf, buf_size)) != (ssize_t) buf_size)
goto out_free;

ret = read_build_id(buf, buf_size, bid, false);
@@ -256,7 +256,7 @@ int sysfs__read_build_id(const char *filename, struct build_id *bid)
int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name,
enum dso_binary_type type)
{
- int fd = open(name, O_RDONLY);
+ int fd = TEMP_FAILURE_RETRY(open(name, O_RDONLY));
if (fd < 0)
goto out_errno;

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index f72baf636724..5212667ea67d 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1335,7 +1335,7 @@ static int dso__load_kcore(struct dso *dso, struct map *map,
md.dso = dso;
INIT_LIST_HEAD(&md.maps);

- fd = open(kcore_filename, O_RDONLY);
+ fd = TEMP_FAILURE_RETRY(open(kcore_filename, O_RDONLY));
if (fd < 0) {
pr_debug("Failed to open %s. Note /proc/kcore requires CAP_SYS_RAWIO capability to access.\n",
kcore_filename);
@@ -2156,7 +2156,7 @@ static int find_matching_kcore(struct map *map, char *dir, size_t dir_sz)
*/
static bool filename__readable(const char *file)
{
- int fd = open(file, O_RDONLY);
+ int fd = TEMP_FAILURE_RETRY(open(file, O_RDONLY));
if (fd < 0)
return false;
close(fd);
diff --git a/tools/perf/util/synthetic-events.c b/tools/perf/util/synthetic-events.c
index 76beda3e1a10..9dcc268bd69c 100644
--- a/tools/perf/util/synthetic-events.c
+++ b/tools/perf/util/synthetic-events.c
@@ -40,6 +40,7 @@
#include <api/io.h>
#include <sys/types.h>
#include <sys/stat.h>
+#include <errno.h>
#include <fcntl.h>
#include <unistd.h>

@@ -86,13 +87,13 @@ static int perf_event__get_comm_ids(pid_t pid, pid_t tid, char *comm, size_t len
else
snprintf(bf, sizeof(bf), "/proc/%d/status", tid);

- fd = open(bf, O_RDONLY);
+ fd = TEMP_FAILURE_RETRY(open(bf, O_RDONLY));
if (fd < 0) {
pr_debug("couldn't open %s\n", bf);
return -1;
}

- n = read(fd, bf, sizeof(bf) - 1);
+ n = TEMP_FAILURE_RETRY(read(fd, bf, sizeof(bf) - 1));
close(fd);
if (n <= 0) {
pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
@@ -410,7 +411,7 @@ int perf_event__synthesize_mmap_events(struct perf_tool *tool,
snprintf(bf, sizeof(bf), "%s/proc/%d/task/%d/maps",
machine->root_dir, pid, pid);

- io.fd = open(bf, O_RDONLY, 0);
+ io.fd = TEMP_FAILURE_RETRY(open(bf, O_RDONLY, 0));
if (io.fd < 0) {
/*
* We raced with a task exiting - just return:
diff --git a/tools/perf/util/trace-event-info.c b/tools/perf/util/trace-event-info.c
index a65f65d0857e..c917a4217c6f 100644
--- a/tools/perf/util/trace-event-info.c
+++ b/tools/perf/util/trace-event-info.c
@@ -48,7 +48,7 @@ static int record_file(const char *file, ssize_t hdr_sz)
int r, fd;
int err = -EIO;

- fd = open(file, O_RDONLY);
+ fd = TEMP_FAILURE_RETRY(open(file, O_RDONLY));
if (fd < 0) {
pr_debug("Can't read '%s'", file);
return -errno;
@@ -61,7 +61,7 @@ static int record_file(const char *file, ssize_t hdr_sz)
}

do {
- r = read(fd, buf, BUFSIZ);
+ r = TEMP_FAILURE_RETRY(read(fd, buf, BUFSIZ));
if (r > 0) {
size += r;
if (write(output_fd, buf, r) != r)
@@ -519,7 +519,7 @@ struct tracing_data *tracing_data_get(struct list_head *pattrs,
return NULL;
}

- temp_fd = open(tdata->temp_file, O_RDWR);
+ temp_fd = TEMP_FAILURE_RETRY(open(tdata->temp_file, O_RDWR));
if (temp_fd < 0) {
pr_debug("Can't read '%s'", tdata->temp_file);
free(tdata);
diff --git a/tools/perf/util/trace-event-read.c b/tools/perf/util/trace-event-read.c
index 8a01af783310..7086770ec225 100644
--- a/tools/perf/util/trace-event-read.c
+++ b/tools/perf/util/trace-event-read.c
@@ -11,6 +11,7 @@
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/mman.h>
+#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
@@ -28,7 +29,7 @@ static int __do_read(int fd, void *buf, int size)
int rsize = size;

while (size) {
- int ret = read(fd, buf, size);
+ int ret = TEMP_FAILURE_RETRY(read(fd, buf, size));

if (ret <= 0)
return -1;
@@ -105,7 +106,7 @@ static char *read_string(void)
char c;

for (;;) {
- r = read(input_fd, &c, 1);
+ r = TEMP_FAILURE_RETRY(read(input_fd, &c, 1));
if (r < 0) {
pr_debug("reading input file");
goto out;
diff --git a/tools/perf/util/unwind-libunwind-local.c b/tools/perf/util/unwind-libunwind-local.c
index 37622699c91a..2ece387a73c6 100644
--- a/tools/perf/util/unwind-libunwind-local.c
+++ b/tools/perf/util/unwind-libunwind-local.c
@@ -362,7 +362,7 @@ static int read_unwind_spec_debug_frame(struct dso *dso,
}

if (ofs <= 0) {
- fd = open(dso->symsrc_filename, O_RDONLY);
+ fd = TEMP_FAILURE_RETRY(open(dso->symsrc_filename, O_RDONLY));
if (fd >= 0) {
ofs = elf_section_offset(fd, ".debug_frame");
close(fd);
@@ -377,7 +377,7 @@ static int read_unwind_spec_debug_frame(struct dso *dso,
dso, DSO_BINARY_TYPE__DEBUGLINK,
machine->root_dir, debuglink, PATH_MAX);
if (!ret) {
- fd = open(debuglink, O_RDONLY);
+ fd = TEMP_FAILURE_RETRY(open(debuglink, O_RDONLY));
if (fd >= 0) {
ofs = elf_section_offset(fd,
".debug_frame");
diff --git a/tools/perf/util/zlib.c b/tools/perf/util/zlib.c
index 78d2297c1b67..f4563ea094c8 100644
--- a/tools/perf/util/zlib.c
+++ b/tools/perf/util/zlib.c
@@ -1,4 +1,5 @@
// SPDX-License-Identifier: GPL-2.0
+#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
@@ -82,7 +83,7 @@ int gzip_decompress_to_file(const char *input, int output_fd)

bool gzip_is_compressed(const char *input)
{
- int fd = open(input, O_RDONLY);
+ int fd = TEMP_FAILURE_RETRY(open(input, O_RDONLY));
const uint8_t magic[2] = { 0x1f, 0x8b };
char buf[2] = { 0 };
ssize_t rc;
@@ -90,7 +91,7 @@ bool gzip_is_compressed(const char *input)
if (fd < 0)
return -1;

- rc = read(fd, buf, sizeof(buf));
+ rc = TEMP_FAILURE_RETRY(read(fd, buf, sizeof(buf)));
close(fd);
return rc == sizeof(buf) ?
memcmp(buf, magic, sizeof(buf)) == 0 : false;
--
2.36.1.476.g0c4daa206d-goog