Messages in this thread | | | From | Ian Rogers <> | Date | Wed, 15 Jun 2022 10:38:40 -0700 | Subject | Re: [PATCH] perf io: Make open and read calls more robust |
| |
On Wed, Jun 15, 2022 at 9:40 AM Adrian Hunter <adrian.hunter@intel.com> wrote: > > On 15/06/22 18:34, Ian Rogers wrote: > > On Tue, Jun 14, 2022 at 11:51 PM Adrian Hunter <adrian.hunter@intel.com> wrote: > >> > >> On 15/06/22 09:03, Ian Rogers wrote: > >>> Wrap open and read calls with TEMP_FAILURE_RETRY in case a signal > >>> causes the syscall to need to restart. > >> > >> Please expand on why you want this change. Can you give an example > >> of where it makes a difference? > > > > As we can get signals pretty much anywhere in the code many syscalls > > are robust to this: > > https://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git/tree/tools/perf/builtin-record.c?h=perf/core#n311 > > https://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git/tree/tools/perf/builtin-record.c?h=perf/core#n372 > > https://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git/tree/tools/perf/builtin-record.c?h=perf/core#n1585 > > https://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git/tree/tools/perf/builtin-record.c?h=perf/core#n2502 > > https://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git/tree/tools/perf/builtin-top.c?h=perf/core#n707 > > https://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git/tree/tools/perf/util/copyfile.c?h=perf/core#n59 > > https://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git/tree/tools/perf/util/evlist.c?h=perf/core#n1966 > > > > But as this change shows there are a large number that are not. They > > will get EINTR and turn it into a failure which really isn't one. > > Making an example of this is near impossible as you need to arrange > > the signal delivery very carefully. I am however motivated to do this > > as we're seeing missing events when running perf in fleetwide > > profiling and I wish to discount EINTR as a cause. > > Aren't most signals set to Ign or Term? What signals could you be getting? > > Is signal() setting SA_RESTART by default? Does that make a difference?
My understanding is that signal will specify SA_RESTART but sigaction won't, so cases like: https://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git/tree/tools/perf/util/evlist.c?h=perf/core#n1475 will cause EINTR. The existing code is partially EINTR resistant and so I'm looking to see this be the norm. I think having a mix is confusing, perhaps existing EINTR usage could be turned into asserts to discover when this does happen. In general I think it is better to be robust, which will matter more in contexts like libperf.
Thanks, Ian
> > > >> It looks pretty ugly so maybe making replacement functions or macros > >> is better e.g. > >> > >> #define open_retry(a, ...) \ > >> ({ long int __result; \ > >> do __result = (long int) open((a), ##__VA_ARGS__); \ > >> while (__result == -1L && errno == EINTR); \ > >> __result; }) > > > > As open is a user land thing there is no Linux precedent to follow > > here. TEMP_FAILURE_RETRY is the general norm, and I'd like to see it > > used when a raw system call is made. ie, if you want open_retry: > > > > #define open_retry(a, ...) TEMP_FAILURE_RETRY(open((a), ##__VA_ARGS__)) > > > > I don't think we need to be in the game of reinventing > > TEMP_FAILURE_RETRY. > > It was only an example. TEMP_FAILURE_RETRY seemed non-standard, > but I guess if we're defining _GNU_SOURCE anyway it doesn't matter. > > > I think we can follow on from this change with > > changes not to use raw open and read calls, instead preferring some of > > our existing EINTR robust reads like readn, etc. Doing that is beyond > > the scope of what this change is trying to do. > > > > Thanks, > > Ian > > > >>> > >>> Signed-off-by: Ian Rogers <irogers@google.com> > >>> --- > >>> 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; > >> >
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