Introduce struct feat_fd. This patch uses it as a wrapper around fd in write_* functions for feature headers. Next patches will extend its functionality to other feature header functions.
This patch does not change behavior. Signed-off-by: David Carrillo-Cisneros <davi...@google.com> --- tools/perf/util/build-id.c | 8 ++- tools/perf/util/build-id.h | 4 +- tools/perf/util/header.c | 134 ++++++++++++++++++++++++++------------------- tools/perf/util/header.h | 7 ++- 4 files changed, 90 insertions(+), 63 deletions(-) diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c index 84d2ea51e557..292e90db3924 100644 --- a/tools/perf/util/build-id.c +++ b/tools/perf/util/build-id.c @@ -330,7 +330,7 @@ bool dso__build_id_is_kmod(const struct dso *dso, char *bf, size_t size) else static int write_buildid(const char *name, size_t name_len, u8 *build_id, - pid_t pid, u16 misc, int fd) + pid_t pid, u16 misc, struct feat_fd *fd) { int err; struct build_id_event b; @@ -352,7 +352,8 @@ static int write_buildid(const char *name, size_t name_len, u8 *build_id, return write_padded(fd, name, name_len + 1, len); } -static int machine__write_buildid_table(struct machine *machine, int fd) +static int machine__write_buildid_table(struct machine *machine, + struct feat_fd *fd) { int err = 0; char nm[PATH_MAX]; @@ -397,7 +398,8 @@ static int machine__write_buildid_table(struct machine *machine, int fd) return err; } -int perf_session__write_buildid_table(struct perf_session *session, int fd) +int perf_session__write_buildid_table(struct perf_session *session, + struct feat_fd *fd) { struct rb_node *nd; int err = machine__write_buildid_table(&session->machines.host, fd); diff --git a/tools/perf/util/build-id.h b/tools/perf/util/build-id.h index a96081121179..84e5e8a52970 100644 --- a/tools/perf/util/build-id.h +++ b/tools/perf/util/build-id.h @@ -9,6 +9,7 @@ extern struct perf_tool build_id__mark_dso_hit_ops; struct dso; +struct feat_fd; int build_id__sprintf(const u8 *build_id, int len, char *bf); int sysfs__sprintf_build_id(const char *root_dir, char *sbuild_id); @@ -26,7 +27,8 @@ int build_id__mark_dso_hit(struct perf_tool *tool, union perf_event *event, int dsos__hit_all(struct perf_session *session); bool perf_session__read_build_ids(struct perf_session *session, bool with_hits); -int perf_session__write_buildid_table(struct perf_session *session, int fd); +int perf_session__write_buildid_table(struct perf_session *session, + struct feat_fd *fd); int perf_session__cache_build_ids(struct perf_session *session); char *build_id_cache__origname(const char *sbuild_id); diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index 292fb2156a59..4934ef543aef 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -57,6 +57,11 @@ struct perf_file_attr { struct perf_file_section ids; }; +struct feat_fd { + struct perf_header *ph; + int fd; +}; + void perf_header__set_feat(struct perf_header *header, int feat) { set_bit(feat, header->adds_features); @@ -73,11 +78,11 @@ bool perf_header__has_feat(const struct perf_header *header, int feat) } /* Return: 0 if succeded, -ERR if failed. */ -int do_write(int fd, const void *buf, size_t size) +int do_write(struct feat_fd *fd, const void *buf, size_t size) { ssize_t ret; - ret = writen(fd, buf, size); + ret = writen(fd->fd, buf, size); if (ret != (ssize_t)size) return ret < 0 ? (int)ret: -1; @@ -85,7 +90,8 @@ int do_write(int fd, const void *buf, size_t size) } /* Return: 0 if succeded, -ERR if failed. */ -int write_padded(int fd, const void *bf, size_t count, size_t count_aligned) +int write_padded(struct feat_fd *fd, const void *bf, + size_t count, size_t count_aligned) { static const char zero_buf[NAME_ALIGN]; int err = do_write(fd, bf, count); @@ -100,7 +106,7 @@ int write_padded(int fd, const void *bf, size_t count, size_t count_aligned) (PERF_ALIGN((strlen(str) + 1), NAME_ALIGN) + sizeof(u32)) /* Return: 0 if succeded, -ERR if failed. */ -static int do_write_string(int fd, const char *str) +static int do_write_string(struct feat_fd *fd, const char *str) { u32 len, olen; int ret; @@ -176,20 +182,19 @@ static char *do_read_string(int fd, struct perf_header *ph) return NULL; } -static int write_tracing_data(int fd, struct perf_header *h __maybe_unused, - struct perf_evlist *evlist) +static int write_tracing_data(struct feat_fd *fd, + struct perf_evlist *evlist) { - return read_tracing_data(fd, &evlist->entries); + return read_tracing_data(fd->fd, &evlist->entries); } - -static int write_build_id(int fd, struct perf_header *h, +static int write_build_id(struct feat_fd *fd, struct perf_evlist *evlist __maybe_unused) { struct perf_session *session; int err; - session = container_of(h, struct perf_session, header); + session = container_of(fd->ph, struct perf_session, header); if (!perf_session__read_build_ids(session, true)) return -1; @@ -204,7 +209,7 @@ static int write_build_id(int fd, struct perf_header *h, return 0; } -static int write_hostname(int fd, struct perf_header *h __maybe_unused, +static int write_hostname(struct feat_fd *fd, struct perf_evlist *evlist __maybe_unused) { struct utsname uts; @@ -217,7 +222,7 @@ static int write_hostname(int fd, struct perf_header *h __maybe_unused, return do_write_string(fd, uts.nodename); } -static int write_osrelease(int fd, struct perf_header *h __maybe_unused, +static int write_osrelease(struct feat_fd *fd, struct perf_evlist *evlist __maybe_unused) { struct utsname uts; @@ -230,7 +235,7 @@ static int write_osrelease(int fd, struct perf_header *h __maybe_unused, return do_write_string(fd, uts.release); } -static int write_arch(int fd, struct perf_header *h __maybe_unused, +static int write_arch(struct feat_fd *fd, struct perf_evlist *evlist __maybe_unused) { struct utsname uts; @@ -243,13 +248,13 @@ static int write_arch(int fd, struct perf_header *h __maybe_unused, return do_write_string(fd, uts.machine); } -static int write_version(int fd, struct perf_header *h __maybe_unused, +static int write_version(struct feat_fd *fd, struct perf_evlist *evlist __maybe_unused) { return do_write_string(fd, perf_version_string); } -static int __write_cpudesc(int fd, const char *cpuinfo_proc) +static int __write_cpudesc(struct feat_fd *fd, const char *cpuinfo_proc) { FILE *file; char *buf = NULL; @@ -306,7 +311,7 @@ static int __write_cpudesc(int fd, const char *cpuinfo_proc) return ret; } -static int write_cpudesc(int fd, struct perf_header *h __maybe_unused, +static int write_cpudesc(struct feat_fd *fd, struct perf_evlist *evlist __maybe_unused) { #ifndef CPUINFO_PROC @@ -325,7 +330,7 @@ static int write_cpudesc(int fd, struct perf_header *h __maybe_unused, } -static int write_nrcpus(int fd, struct perf_header *h __maybe_unused, +static int write_nrcpus(struct feat_fd *fd, struct perf_evlist *evlist __maybe_unused) { long nr; @@ -347,7 +352,7 @@ static int write_nrcpus(int fd, struct perf_header *h __maybe_unused, return do_write(fd, &nra, sizeof(nra)); } -static int write_event_desc(int fd, struct perf_header *h __maybe_unused, +static int write_event_desc(struct feat_fd *fd, struct perf_evlist *evlist) { struct perf_evsel *evsel; @@ -403,7 +408,7 @@ static int write_event_desc(int fd, struct perf_header *h __maybe_unused, return 0; } -static int write_cmdline(int fd, struct perf_header *h __maybe_unused, +static int write_cmdline(struct feat_fd *fd, struct perf_evlist *evlist __maybe_unused) { char buf[MAXPATHLEN]; @@ -583,8 +588,8 @@ static struct cpu_topo *build_cpu_topology(void) return tp; } -static int write_cpu_topology(int fd, struct perf_header *h __maybe_unused, - struct perf_evlist *evlist __maybe_unused) +static int write_cpu_topology(struct feat_fd *fd, + struct perf_evlist *evlist __maybe_unused) { struct cpu_topo *tp; u32 i; @@ -634,8 +639,8 @@ static int write_cpu_topology(int fd, struct perf_header *h __maybe_unused, -static int write_total_mem(int fd, struct perf_header *h __maybe_unused, - struct perf_evlist *evlist __maybe_unused) +static int write_total_mem(struct feat_fd *fd, + struct perf_evlist *evlist __maybe_unused) { char *buf = NULL; FILE *fp; @@ -663,7 +668,7 @@ static int write_total_mem(int fd, struct perf_header *h __maybe_unused, return ret; } -static int write_topo_node(int fd, int node) +static int write_topo_node(struct feat_fd *fd, int node) { char str[MAXPATHLEN]; char field[32]; @@ -723,8 +728,8 @@ static int write_topo_node(int fd, int node) return ret; } -static int write_numa_topology(int fd, struct perf_header *h __maybe_unused, - struct perf_evlist *evlist __maybe_unused) +static int write_numa_topology(struct feat_fd *fd, + struct perf_evlist *evlist __maybe_unused) { char *buf = NULL; size_t len = 0; @@ -784,11 +789,11 @@ static int write_numa_topology(int fd, struct perf_header *h __maybe_unused, * }; */ -static int write_pmu_mappings(int fd, struct perf_header *h __maybe_unused, +static int write_pmu_mappings(struct feat_fd *fd, struct perf_evlist *evlist __maybe_unused) { struct perf_pmu *pmu = NULL; - off_t offset = lseek(fd, 0, SEEK_CUR); + off_t offset = lseek(fd->fd, 0, SEEK_CUR); __u32 pmu_num = 0; int ret; @@ -811,9 +816,9 @@ static int write_pmu_mappings(int fd, struct perf_header *h __maybe_unused, return ret; } - if (pwrite(fd, &pmu_num, sizeof(pmu_num), offset) != sizeof(pmu_num)) { + if (pwrite(fd->fd, &pmu_num, sizeof(pmu_num), offset) != sizeof(pmu_num)) { /* discard all */ - lseek(fd, offset, SEEK_SET); + lseek(fd->fd, offset, SEEK_SET); return -1; } @@ -832,7 +837,7 @@ static int write_pmu_mappings(int fd, struct perf_header *h __maybe_unused, * }[nr_groups]; * }; */ -static int write_group_desc(int fd, struct perf_header *h __maybe_unused, +static int write_group_desc(struct feat_fd *fd, struct perf_evlist *evlist) { u32 nr_groups = evlist->nr_groups; @@ -875,7 +880,7 @@ int __weak get_cpuid(char *buffer __maybe_unused, size_t sz __maybe_unused) return -1; } -static int write_cpuid(int fd, struct perf_header *h __maybe_unused, +static int write_cpuid(struct feat_fd *fd, struct perf_evlist *evlist __maybe_unused) { char buffer[64]; @@ -890,22 +895,21 @@ static int write_cpuid(int fd, struct perf_header *h __maybe_unused, return do_write_string(fd, buffer); } -static int write_branch_stack(int fd __maybe_unused, - struct perf_header *h __maybe_unused, - struct perf_evlist *evlist __maybe_unused) +static int write_branch_stack(struct feat_fd *fd __maybe_unused, + struct perf_evlist *evlist __maybe_unused) { return 0; } -static int write_auxtrace(int fd, struct perf_header *h, +static int write_auxtrace(struct feat_fd *fd, struct perf_evlist *evlist __maybe_unused) { struct perf_session *session; int err; - session = container_of(h, struct perf_session, header); + session = container_of(fd->ph, struct perf_session, header); - err = auxtrace_index__write(fd, &session->auxtrace_index); + err = auxtrace_index__write(fd->fd, &session->auxtrace_index); if (err < 0) pr_err("Failed to write auxtrace index\n"); return err; @@ -1052,8 +1056,8 @@ static int build_caches(struct cpu_cache_level caches[], u32 size, u32 *cntp) #define MAX_CACHES 2000 -static int write_cache(int fd, struct perf_header *h __maybe_unused, - struct perf_evlist *evlist __maybe_unused) +static int write_cache(struct feat_fd *fd, + struct perf_evlist *evlist __maybe_unused) { struct cpu_cache_level caches[MAX_CACHES]; u32 cnt = 0, i, version = 1; @@ -1104,8 +1108,7 @@ static int write_cache(int fd, struct perf_header *h __maybe_unused, return ret; } -static int write_stat(int fd __maybe_unused, - struct perf_header *h __maybe_unused, +static int write_stat(struct feat_fd *fd __maybe_unused, struct perf_evlist *evlist __maybe_unused) { return 0; @@ -2091,7 +2094,7 @@ static int process_cache(struct perf_file_section *section __maybe_unused, } struct feature_ops { - int (*write)(int fd, struct perf_header *h, struct perf_evlist *evlist); + int (*write)(struct feat_fd *fd, struct perf_evlist *evlist); void (*print)(struct perf_header *h, int fd, FILE *fp); int (*process)(struct perf_file_section *section, struct perf_header *h, int fd, void *data); @@ -2200,7 +2203,7 @@ int perf_header__fprintf_info(struct perf_session *session, FILE *fp, bool full) return 0; } -static int do_write_feat(int fd, struct perf_header *h, int type, +static int do_write_feat(struct feat_fd *fd, struct perf_header *h, int type, struct perf_file_section **p, struct perf_evlist *evlist) { @@ -2211,18 +2214,18 @@ static int do_write_feat(int fd, struct perf_header *h, int type, if (!feat_ops[type].write) return -1; - (*p)->offset = lseek(fd, 0, SEEK_CUR); + (*p)->offset = lseek(fd->fd, 0, SEEK_CUR); - err = feat_ops[type].write(fd, h, evlist); + err = feat_ops[type].write(fd, evlist); if (err < 0) { pr_debug("failed to write feature %s\n", feat_ops[type].name); /* undo anything written */ - lseek(fd, (*p)->offset, SEEK_SET); + lseek(fd->fd, (*p)->offset, SEEK_SET); return -1; } - (*p)->size = lseek(fd, 0, SEEK_CUR) - (*p)->offset; + (*p)->size = lseek(fd->fd, 0, SEEK_CUR) - (*p)->offset; (*p)++; } return ret; @@ -2232,12 +2235,18 @@ static int perf_header__adds_write(struct perf_header *header, struct perf_evlist *evlist, int fd) { int nr_sections; + struct feat_fd fdd; struct perf_file_section *feat_sec, *p; int sec_size; u64 sec_start; int feat; int err; + fdd = (struct feat_fd){ + .fd = fd, + .ph = header, + }; + nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS); if (!nr_sections) return 0; @@ -2252,7 +2261,7 @@ static int perf_header__adds_write(struct perf_header *header, lseek(fd, sec_start + sec_size, SEEK_SET); for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) { - if (do_write_feat(fd, header, feat, &p, evlist)) + if (do_write_feat(&fdd, header, feat, &p, evlist)) perf_header__clear_feat(header, feat); } @@ -2261,7 +2270,7 @@ static int perf_header__adds_write(struct perf_header *header, * may write more than needed due to dropped feature, but * this is okay, reader will skip the mising entries */ - err = do_write(fd, feat_sec, sec_size); + err = do_write(&fdd, feat_sec, sec_size); if (err < 0) pr_debug("failed to write feature section\n"); free(feat_sec); @@ -2271,14 +2280,17 @@ static int perf_header__adds_write(struct perf_header *header, int perf_header__write_pipe(int fd) { struct perf_pipe_file_header f_header; + struct feat_fd fdd; int err; + fdd = (struct feat_fd){ .fd = fd }; + f_header = (struct perf_pipe_file_header){ .magic = PERF_MAGIC, .size = sizeof(f_header), }; - err = do_write(fd, &f_header, sizeof(f_header)); + err = do_write(&fdd, &f_header, sizeof(f_header)); if (err < 0) { pr_debug("failed to write perf pipe header\n"); return err; @@ -2295,21 +2307,23 @@ int perf_session__write_header(struct perf_session *session, struct perf_file_attr f_attr; struct perf_header *header = &session->header; struct perf_evsel *evsel; + struct feat_fd fdd; u64 attr_offset; int err; + fdd = (struct feat_fd){ .fd = fd}; lseek(fd, sizeof(f_header), SEEK_SET); evlist__for_each_entry(session->evlist, evsel) { evsel->id_offset = lseek(fd, 0, SEEK_CUR); - err = do_write(fd, evsel->id, evsel->ids * sizeof(u64)); + err = do_write(&fdd, evsel->id, evsel->ids * sizeof(u64)); if (err < 0) { pr_debug("failed to write perf header\n"); return err; } } - attr_offset = lseek(fd, 0, SEEK_CUR); + attr_offset = lseek(fdd.fd, 0, SEEK_CUR); evlist__for_each_entry(evlist, evsel) { f_attr = (struct perf_file_attr){ @@ -2319,7 +2333,7 @@ int perf_session__write_header(struct perf_session *session, .size = evsel->ids * sizeof(u64), } }; - err = do_write(fd, &f_attr, sizeof(f_attr)); + err = do_write(&fdd, &f_attr, sizeof(f_attr)); if (err < 0) { pr_debug("failed to write perf header attribute\n"); return err; @@ -2354,7 +2368,7 @@ int perf_session__write_header(struct perf_session *session, memcpy(&f_header.adds_features, &header->adds_features, sizeof(header->adds_features)); lseek(fd, 0, SEEK_SET); - err = do_write(fd, &f_header, sizeof(f_header)); + err = do_write(&fdd, &f_header, sizeof(f_header)); if (err < 0) { pr_debug("failed to write perf header\n"); return err; @@ -2629,6 +2643,10 @@ static int perf_file_header__read_pipe(struct perf_pipe_file_header *header, struct perf_header *ph, int fd, bool repipe) { + struct feat_fd fdd = { + .fd = STDOUT_FILENO, + .ph = ph, + }; ssize_t ret; ret = readn(fd, header, sizeof(*header)); @@ -2643,7 +2661,7 @@ static int perf_file_header__read_pipe(struct perf_pipe_file_header *header, if (ph->needs_swap) header->size = bswap_64(header->size); - if (repipe && do_write(STDOUT_FILENO, header, sizeof(*header)) < 0) + if (repipe && do_write(&fdd, header, sizeof(*header)) < 0) return -1; return 0; @@ -3151,6 +3169,7 @@ int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd, union perf_event ev; struct tracing_data *tdata; ssize_t size = 0, aligned_size = 0, padding; + struct feat_fd fdd; int err __maybe_unused = 0; /* @@ -3185,7 +3204,8 @@ int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd, */ tracing_data_put(tdata); - if (write_padded(fd, NULL, 0, padding)) + fdd = (struct feat_fd){ .fd = fd }; + if (write_padded(&fdd, NULL, 0, padding)) return -1; return aligned_size; diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h index e98489c8bba7..9d8dcd5eb727 100644 --- a/tools/perf/util/header.h +++ b/tools/perf/util/header.h @@ -144,9 +144,12 @@ bool is_perf_magic(u64 magic); #define NAME_ALIGN 64 -int do_write(int fd, const void *buf, size_t size); +struct feat_fd; -int write_padded(int fd, const void *bf, size_t count, size_t count_aligned); +int do_write(struct feat_fd *fd, const void *buf, size_t size); + +int write_padded(struct feat_fd *fd, const void *bf, + size_t count, size_t count_aligned); /* * arch specific callback -- 2.13.0.219.gdb65acc882-goog