[PATCH v2 09/13] perf header: use struct feat_fd in read header records

[David Carrillo-Cisneros]

As preparation for using header records in-pipe mode, replace
int fd with struct feat_fd in read functions for all header
record types.

This patch does not change behavior.

Signed-off-by: David Carrillo-Cisneros <davidcc@xxxxxxxxxx>
---
 tools/perf/util/header.c | 93 ++++++++++++++++++++++++------------------------
 1 file changed, 46 insertions(+), 47 deletions(-)

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index dc923f5639f8..65cd2d1f1721 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -124,16 +124,16 @@ static int do_write_string(struct feat_fd *fd, const char *str)
 	return write_padded(fd, str, olen, len);
 }
 
-static int __do_read(int fd, void *addr, ssize_t size)
+static int __do_read(struct feat_fd *fd, void *addr, ssize_t size)
 {
-	ssize_t ret = readn(fd, addr, size);
+	ssize_t ret = readn(fd->fd, addr, size);
 
 	if (ret != (ssize_t)size)
 		return ret < 0 ? (int)ret : -1;
 	return 0;
 }
 
-static int do_read_u32(int fd, struct perf_header *ph, u32 *addr)
+static int do_read_u32(struct feat_fd *fd, u32 *addr)
 {
 	int ret;
 
@@ -141,12 +141,12 @@ static int do_read_u32(int fd, struct perf_header *ph, u32 *addr)
 	if (ret)
 		return ret;
 
-	if (ph->needs_swap)
+	if (fd->ph->needs_swap)
 		*addr = bswap_32(*addr);
 	return 0;
 }
 
-static int do_read_u64(int fd, struct perf_header *ph, u64 *addr)
+static int do_read_u64(struct feat_fd *fd, u64 *addr)
 {
 	int ret;
 
@@ -154,17 +154,17 @@ static int do_read_u64(int fd, struct perf_header *ph, u64 *addr)
 	if (ret)
 		return ret;
 
-	if (ph->needs_swap)
+	if (fd->ph->needs_swap)
 		*addr = bswap_64(*addr);
 	return 0;
 }
 
-static char *do_read_string(int fd, struct perf_header *ph)
+static char *do_read_string(struct feat_fd *fd)
 {
 	u32 len;
 	char *buf;
 
-	if (do_read_u32(fd, ph, &len))
+	if (do_read_u32(fd, &len))
 		return NULL;
 
 	buf = malloc(len);
@@ -1206,8 +1206,7 @@ static void free_event_desc(struct perf_evsel *events)
 	free(events);
 }
 
-static struct perf_evsel *
-read_event_desc(struct perf_header *ph, int fd)
+static struct perf_evsel *read_event_desc(struct feat_fd *fd)
 {
 	struct perf_evsel *evsel, *events = NULL;
 	u64 *id;
@@ -1217,10 +1216,10 @@ read_event_desc(struct perf_header *ph, int fd)
 	size_t msz;
 
 	/* number of events */
-	if (do_read_u32(fd, ph, &nre))
+	if (do_read_u32(fd, &nre))
 		goto error;
 
-	if (do_read_u32(fd, ph, &sz))
+	if (do_read_u32(fd, &sz))
 		goto error;
 
 	/* buffer to hold on file attr struct */
@@ -1248,18 +1247,18 @@ read_event_desc(struct perf_header *ph, int fd)
 		if (ret != (ssize_t)sz)
 			goto error;
 
-		if (ph->needs_swap)
+		if (fd->ph->needs_swap)
 			perf_event__attr_swap(buf);
 
 		memcpy(&evsel->attr, buf, msz);
 
-		if (do_read_u32(fd, ph, &nr))
+		if (do_read_u32(fd, &nr))
 			goto error;
 
-		if (ph->needs_swap)
+		if (fd->ph->needs_swap)
 			evsel->needs_swap = true;
 
-		evsel->name = do_read_string(fd, ph);
+		evsel->name = do_read_string(fd);
 
 		if (!nr)
 			continue;
@@ -1271,7 +1270,7 @@ read_event_desc(struct perf_header *ph, int fd)
 		evsel->id = id;
 
 		for (j = 0 ; j < nr; j++) {
-			if (do_read_u64(fd, ph, id))
+			if (do_read_u64(fd, id))
 				goto error;
 			id++;
 		}
@@ -1293,7 +1292,7 @@ static int __desc_attr__fprintf(FILE *fp, const char *name, const char *val,
 
 static void print_event_desc(struct feat_fd *fd, FILE *fp)
 {
-	struct perf_evsel *evsel, *events = read_event_desc(fd->ph, fd->fd);
+	struct perf_evsel *evsel, *events = read_event_desc(fd);
 	u32 j;
 	u64 *id;
 
@@ -1587,7 +1586,7 @@ static int perf_header__read_build_ids(struct perf_header *header,
 #define FEAT_PROCESS_STR_FUN(__feat, __feat_env) \
 static int process_##__feat(struct feat_fd *fd, void *data __maybe_unused) \
 {\
-	fd->ph->env.__feat_env = do_read_string(fd->fd, fd->ph); \
+	fd->ph->env.__feat_env = do_read_string(fd); \
 	return fd->ph->env.__feat_env ? 0 : -ENOMEM; \
 }
 
@@ -1617,11 +1616,11 @@ static int process_nrcpus(struct feat_fd *fd, void *data __maybe_unused)
 	int ret;
 	u32 nr_cpus_avail, nr_cpus_online;
 
-	ret = do_read_u32(fd->fd, fd->ph, &nr_cpus_avail);
+	ret = do_read_u32(fd, &nr_cpus_avail);
 	if (ret)
 		return ret;
 
-	ret = do_read_u32(fd->fd, fd->ph, &nr_cpus_online);
+	ret = do_read_u32(fd, &nr_cpus_online);
 	if (ret)
 		return ret;
 	fd->ph->env.nr_cpus_avail = (int)nr_cpus_avail;
@@ -1634,7 +1633,7 @@ static int process_total_mem(struct feat_fd *fd, void *data __maybe_unused)
 	u64 total_mem;
 	int ret;
 
-	ret = do_read_u64(fd->fd, fd->ph, &total_mem);
+	ret = do_read_u64(fd, &total_mem);
 	if (ret)
 		return -1;
 	fd->ph->env.total_mem = (unsigned long long)total_mem;
@@ -1677,7 +1676,7 @@ static int
 process_event_desc(struct feat_fd *fd, void *data __maybe_unused)
 {
 	struct perf_session *session;
-	struct perf_evsel *evsel, *events = read_event_desc(fd->ph, fd->fd);
+	struct perf_evsel *evsel, *events = read_event_desc(fd);
 
 	if (!events)
 		return 0;
@@ -1696,7 +1695,7 @@ static int process_cmdline(struct feat_fd *fd, void *data __maybe_unused)
 	char *str, *cmdline = NULL, **argv = NULL;
 	u32 nr, i, len = 0;
 
-	if (do_read_u32(fd->fd, fd->ph, &nr))
+	if (do_read_u32(fd, &nr))
 		return -1;
 
 	fd->ph->env.nr_cmdline = nr;
@@ -1710,7 +1709,7 @@ static int process_cmdline(struct feat_fd *fd, void *data __maybe_unused)
 		goto error;
 
 	for (i = 0; i < nr; i++) {
-		str = do_read_string(fd->fd, fd->ph);
+		str = do_read_string(fd);
 		if (!str)
 			goto error;
 
@@ -1742,7 +1741,7 @@ static int process_cpu_topology(struct feat_fd *fd, void *data __maybe_unused)
 	if (!ph->env.cpu)
 		return -1;
 
-	if (do_read_u32(fd->fd, fd->ph, &nr))
+	if (do_read_u32(fd, &nr))
 		goto free_cpu;
 
 	ph->env.nr_sibling_cores = nr;
@@ -1750,7 +1749,7 @@ static int process_cpu_topology(struct feat_fd *fd, void *data __maybe_unused)
 		goto free_cpu;
 
 	for (i = 0; i < nr; i++) {
-		str = do_read_string(fd->fd, fd->ph);
+		str = do_read_string(fd);
 		if (!str)
 			goto error;
 
@@ -1761,13 +1760,13 @@ static int process_cpu_topology(struct feat_fd *fd, void *data __maybe_unused)
 	}
 	ph->env.sibling_cores = strbuf_detach(&sb, NULL);
 
-	if (do_read_u32(fd->fd, fd->ph, &nr))
+	if (do_read_u32(fd, &nr))
 		return -1;
 
 	ph->env.nr_sibling_threads = nr;
 
 	for (i = 0; i < nr; i++) {
-		str = do_read_string(fd->fd, fd->ph);
+		str = do_read_string(fd);
 		if (!str)
 			goto error;
 
@@ -1788,12 +1787,12 @@ static int process_cpu_topology(struct feat_fd *fd, void *data __maybe_unused)
 	}
 
 	for (i = 0; i < (u32)cpu_nr; i++) {
-		if (do_read_u32(fd->fd, fd->ph, &nr))
+		if (do_read_u32(fd, &nr))
 			goto free_cpu;
 
 		ph->env.cpu[i].core_id = nr;
 
-		if (do_read_u32(fd->fd, fd->ph, &nr))
+		if (do_read_u32(fd, &nr))
 			goto free_cpu;
 
 		if (nr != (u32)-1 && nr > (u32)cpu_nr) {
@@ -1822,7 +1821,7 @@ static int process_numa_topology(struct feat_fd *fd, void *data __maybe_unused)
 	char *str;
 
 	/* nr nodes */
-	if (do_read_u32(fd->fd, fd->ph, &nr))
+	if (do_read_u32(fd, &nr))
 		return -1;
 
 	nodes = zalloc(sizeof(*nodes) * nr);
@@ -1833,16 +1832,16 @@ static int process_numa_topology(struct feat_fd *fd, void *data __maybe_unused)
 		n = &nodes[i];
 
 		/* node number */
-		if (do_read_u32(fd->fd, fd->ph, &n->node))
+		if (do_read_u32(fd, &n->node))
 			goto error;
 
-		if (do_read_u64(fd->fd, fd->ph, &n->mem_total))
+		if (do_read_u64(fd, &n->mem_total))
 			goto error;
 
-		if (do_read_u64(fd->fd, fd->ph, &n->mem_free))
+		if (do_read_u64(fd, &n->mem_free))
 			goto error;
 
-		str = do_read_string(fd->fd, fd->ph);
+		str = do_read_string(fd);
 		if (!str)
 			goto error;
 
@@ -1869,7 +1868,7 @@ static int process_pmu_mappings(struct feat_fd *fd, void *data __maybe_unused)
 	u32 type;
 	struct strbuf sb;
 
-	if (do_read_u32(fd->fd, fd->ph, &pmu_num))
+	if (do_read_u32(fd, &pmu_num))
 		return -1;
 
 	if (!pmu_num) {
@@ -1882,10 +1881,10 @@ static int process_pmu_mappings(struct feat_fd *fd, void *data __maybe_unused)
 		return -1;
 
 	while (pmu_num) {
-		if (do_read_u32(fd->fd, fd->ph, &type))
+		if (do_read_u32(fd, &type))
 			goto error;
 
-		name = do_read_string(fd->fd, fd->ph);
+		name = do_read_string(fd);
 		if (!name)
 			goto error;
 
@@ -1922,7 +1921,7 @@ static int process_group_desc(struct feat_fd *fd, void *data __maybe_unused)
 		u32 nr_members;
 	} *desc;
 
-	if (do_read_u32(fd->fd, fd->ph, &nr_groups))
+	if (do_read_u32(fd, &nr_groups))
 		return -1;
 
 	ph->env.nr_groups = nr_groups;
@@ -1936,14 +1935,14 @@ static int process_group_desc(struct feat_fd *fd, void *data __maybe_unused)
 		return -1;
 
 	for (i = 0; i < nr_groups; i++) {
-		desc[i].name = do_read_string(fd->fd, fd->ph);
+		desc[i].name = do_read_string(fd);
 		if (!desc[i].name)
 			goto out_free;
 
-		if (do_read_u32(fd->fd, fd->ph, &desc[i].leader_idx))
+		if (do_read_u32(fd, &desc[i].leader_idx))
 			goto out_free;
 
-		if (do_read_u32(fd->fd, fd->ph, &desc[i].nr_members))
+		if (do_read_u32(fd, &desc[i].nr_members))
 			goto out_free;
 	}
 
@@ -2013,13 +2012,13 @@ static int process_cache(struct feat_fd *fd, void *data __maybe_unused)
 	struct cpu_cache_level *caches;
 	u32 cnt, i, version;
 
-	if (do_read_u32(fd->fd, fd->ph, &version))
+	if (do_read_u32(fd, &version))
 		return -1;
 
 	if (version != 1)
 		return -1;
 
-	if (do_read_u32(fd->fd, fd->ph, &cnt))
+	if (do_read_u32(fd, &cnt))
 		return -1;
 
 	caches = zalloc(sizeof(*caches) * cnt);
@@ -2030,7 +2029,7 @@ static int process_cache(struct feat_fd *fd, void *data __maybe_unused)
 		struct cpu_cache_level c;
 
 		#define _R(v)						\
-			if (do_read_u32(fd->fd, fd->ph, &c.v))\
+			if (do_read_u32(fd, &c.v))\
 				goto out_free_caches;			\
 
 		_R(level)
@@ -2040,7 +2039,7 @@ static int process_cache(struct feat_fd *fd, void *data __maybe_unused)
 		#undef _R
 
 		#define _R(v)				\
-			c.v = do_read_string(fd->fd, fd->ph);	\
+			c.v = do_read_string(fd);	\
 			if (!c.v)			\
 				goto out_free_caches;
 
-- 
2.13.0.219.gdb65acc882-goog