From 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 07:44:59 +0000
Subject: [PATCH] gmac get mac form eeprom
---
kernel/tools/perf/util/util.c | 354 ++++++++++++++++++++++-------------------------------------
1 files changed, 132 insertions(+), 222 deletions(-)
diff --git a/kernel/tools/perf/util/util.c b/kernel/tools/perf/util/util.c
index eac5b85..df3c467 100644
--- a/kernel/tools/perf/util/util.c
+++ b/kernel/tools/perf/util/util.c
@@ -1,9 +1,8 @@
// SPDX-License-Identifier: GPL-2.0
-#include "../perf.h"
#include "util.h"
#include "debug.h"
+#include "event.h"
#include <api/fs/fs.h>
-#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/utsname.h>
#include <dirent.h>
@@ -15,11 +14,14 @@
#include <string.h>
#include <errno.h>
#include <limits.h>
+#include <linux/capability.h>
#include <linux/kernel.h>
#include <linux/log2.h>
#include <linux/time64.h>
#include <unistd.h>
+#include "cap.h"
#include "strlist.h"
+#include "string2.h"
/*
* XXX We need to find a better place for these things...
@@ -37,28 +39,6 @@
perf_singlethreaded = false;
}
-unsigned int page_size;
-
-#ifdef _SC_LEVEL1_DCACHE_LINESIZE
-#define cache_line_size(cacheline_sizep) *cacheline_sizep = sysconf(_SC_LEVEL1_DCACHE_LINESIZE)
-#else
-static void cache_line_size(int *cacheline_sizep)
-{
- if (sysfs__read_int("devices/system/cpu/cpu0/cache/index0/coherency_line_size", cacheline_sizep))
- pr_debug("cannot determine cache line size");
-}
-#endif
-
-int cacheline_size(void)
-{
- static int size;
-
- if (!size)
- cache_line_size(&size);
-
- return size;
-}
-
int sysctl_perf_event_max_stack = PERF_MAX_STACK_DEPTH;
int sysctl_perf_event_max_contexts_per_stack = PERF_MAX_CONTEXTS_PER_STACK;
@@ -73,6 +53,24 @@
sysctl_perf_event_max_contexts_per_stack = value;
return sysctl_perf_event_max_stack;
+}
+
+bool sysctl__nmi_watchdog_enabled(void)
+{
+ static bool cached;
+ static bool nmi_watchdog;
+ int value;
+
+ if (cached)
+ return nmi_watchdog;
+
+ if (sysctl__read_int("kernel/nmi_watchdog", &value) < 0)
+ return false;
+
+ nmi_watchdog = (value > 0) ? true : false;
+ cached = true;
+
+ return nmi_watchdog;
}
bool test_attr__enabled;
@@ -116,22 +114,68 @@
return (stat(path, &st) && mkdir(path, mode)) ? -1 : 0;
}
-int rm_rf(const char *path)
+static bool match_pat(char *file, const char **pat)
+{
+ int i = 0;
+
+ if (!pat)
+ return true;
+
+ while (pat[i]) {
+ if (strglobmatch(file, pat[i]))
+ return true;
+
+ i++;
+ }
+
+ return false;
+}
+
+/*
+ * The depth specify how deep the removal will go.
+ * 0 - will remove only files under the 'path' directory
+ * 1 .. x - will dive in x-level deep under the 'path' directory
+ *
+ * If specified the pat is array of string patterns ended with NULL,
+ * which are checked upon every file/directory found. Only matching
+ * ones are removed.
+ *
+ * The function returns:
+ * 0 on success
+ * -1 on removal failure with errno set
+ * -2 on pattern failure
+ */
+static int rm_rf_depth_pat(const char *path, int depth, const char **pat)
{
DIR *dir;
- int ret = 0;
+ int ret;
struct dirent *d;
char namebuf[PATH_MAX];
+ struct stat statbuf;
- dir = opendir(path);
- if (dir == NULL)
+ /* Do not fail if there's no file. */
+ ret = lstat(path, &statbuf);
+ if (ret)
return 0;
+ /* Try to remove any file we get. */
+ if (!(statbuf.st_mode & S_IFDIR))
+ return unlink(path);
+
+ /* We have directory in path. */
+ dir = opendir(path);
+ if (dir == NULL)
+ return -1;
+
while ((d = readdir(dir)) != NULL && !ret) {
- struct stat statbuf;
if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
continue;
+
+ if (!match_pat(d->d_name, pat)) {
+ ret = -2;
+ break;
+ }
scnprintf(namebuf, sizeof(namebuf), "%s/%s",
path, d->d_name);
@@ -144,7 +188,7 @@
}
if (S_ISDIR(statbuf.st_mode))
- ret = rm_rf(namebuf);
+ ret = depth ? rm_rf_depth_pat(namebuf, depth - 1, pat) : 0;
else
ret = unlink(namebuf);
}
@@ -154,6 +198,39 @@
return ret;
return rmdir(path);
+}
+
+static int rm_rf_kcore_dir(const char *path)
+{
+ char kcore_dir_path[PATH_MAX];
+ const char *pat[] = {
+ "kcore",
+ "kallsyms",
+ "modules",
+ NULL,
+ };
+
+ snprintf(kcore_dir_path, sizeof(kcore_dir_path), "%s/kcore_dir", path);
+
+ return rm_rf_depth_pat(kcore_dir_path, 0, pat);
+}
+
+int rm_rf_perf_data(const char *path)
+{
+ const char *pat[] = {
+ "data",
+ "data.*",
+ NULL,
+ };
+
+ rm_rf_kcore_dir(path);
+
+ return rm_rf_depth_pat(path, 0, pat);
+}
+
+int rm_rf(const char *path)
+{
+ return rm_rf_depth_pat(path, INT_MAX, NULL);
}
/* A filter which removes dot files */
@@ -190,178 +267,6 @@
return list;
}
-static int slow_copyfile(const char *from, const char *to, struct nsinfo *nsi)
-{
- int err = -1;
- char *line = NULL;
- size_t n;
- FILE *from_fp, *to_fp;
- struct nscookie nsc;
-
- nsinfo__mountns_enter(nsi, &nsc);
- from_fp = fopen(from, "r");
- nsinfo__mountns_exit(&nsc);
- if (from_fp == NULL)
- goto out;
-
- to_fp = fopen(to, "w");
- if (to_fp == NULL)
- goto out_fclose_from;
-
- while (getline(&line, &n, from_fp) > 0)
- if (fputs(line, to_fp) == EOF)
- goto out_fclose_to;
- err = 0;
-out_fclose_to:
- fclose(to_fp);
- free(line);
-out_fclose_from:
- fclose(from_fp);
-out:
- return err;
-}
-
-static int copyfile_offset(int ifd, loff_t off_in, int ofd, loff_t off_out, u64 size)
-{
- void *ptr;
- loff_t pgoff;
-
- pgoff = off_in & ~(page_size - 1);
- off_in -= pgoff;
-
- ptr = mmap(NULL, off_in + size, PROT_READ, MAP_PRIVATE, ifd, pgoff);
- if (ptr == MAP_FAILED)
- return -1;
-
- while (size) {
- ssize_t ret = pwrite(ofd, ptr + off_in, size, off_out);
- if (ret < 0 && errno == EINTR)
- continue;
- if (ret <= 0)
- break;
-
- size -= ret;
- off_in += ret;
- off_out += ret;
- }
- munmap(ptr, off_in + size);
-
- return size ? -1 : 0;
-}
-
-static int copyfile_mode_ns(const char *from, const char *to, mode_t mode,
- struct nsinfo *nsi)
-{
- int fromfd, tofd;
- struct stat st;
- int err;
- char *tmp = NULL, *ptr = NULL;
- struct nscookie nsc;
-
- nsinfo__mountns_enter(nsi, &nsc);
- err = stat(from, &st);
- nsinfo__mountns_exit(&nsc);
- if (err)
- goto out;
- err = -1;
-
- /* extra 'x' at the end is to reserve space for '.' */
- if (asprintf(&tmp, "%s.XXXXXXx", to) < 0) {
- tmp = NULL;
- goto out;
- }
- ptr = strrchr(tmp, '/');
- if (!ptr)
- goto out;
- ptr = memmove(ptr + 1, ptr, strlen(ptr) - 1);
- *ptr = '.';
-
- tofd = mkstemp(tmp);
- if (tofd < 0)
- goto out;
-
- if (fchmod(tofd, mode))
- goto out_close_to;
-
- if (st.st_size == 0) { /* /proc? do it slowly... */
- err = slow_copyfile(from, tmp, nsi);
- goto out_close_to;
- }
-
- nsinfo__mountns_enter(nsi, &nsc);
- fromfd = open(from, O_RDONLY);
- nsinfo__mountns_exit(&nsc);
- if (fromfd < 0)
- goto out_close_to;
-
- err = copyfile_offset(fromfd, 0, tofd, 0, st.st_size);
-
- close(fromfd);
-out_close_to:
- close(tofd);
- if (!err)
- err = link(tmp, to);
- unlink(tmp);
-out:
- free(tmp);
- return err;
-}
-
-int copyfile_ns(const char *from, const char *to, struct nsinfo *nsi)
-{
- return copyfile_mode_ns(from, to, 0755, nsi);
-}
-
-int copyfile_mode(const char *from, const char *to, mode_t mode)
-{
- return copyfile_mode_ns(from, to, mode, NULL);
-}
-
-int copyfile(const char *from, const char *to)
-{
- return copyfile_mode(from, to, 0755);
-}
-
-static ssize_t ion(bool is_read, int fd, void *buf, size_t n)
-{
- void *buf_start = buf;
- size_t left = n;
-
- while (left) {
- /* buf must be treated as const if !is_read. */
- ssize_t ret = is_read ? read(fd, buf, left) :
- write(fd, buf, left);
-
- if (ret < 0 && errno == EINTR)
- continue;
- if (ret <= 0)
- return ret;
-
- left -= ret;
- buf += ret;
- }
-
- BUG_ON((size_t)(buf - buf_start) != n);
- return n;
-}
-
-/*
- * Read exactly 'n' bytes or return an error.
- */
-ssize_t readn(int fd, void *buf, size_t n)
-{
- return ion(true, fd, buf, n);
-}
-
-/*
- * Write exactly 'n' bytes or return an error.
- */
-ssize_t writen(int fd, const void *buf, size_t n)
-{
- /* ion does not modify buf. */
- return ion(false, fd, (void *)buf, n);
-}
-
size_t hex_width(u64 v)
{
size_t n = 1;
@@ -370,19 +275,6 @@
++n;
return n;
-}
-
-/*
- * While we find nice hex chars, build a long_val.
- * Return number of chars processed.
- */
-int hex2u64(const char *ptr, u64 *long_val)
-{
- char *p;
-
- *long_val = strtoull(ptr, &p, 16);
-
- return p - ptr;
}
int perf_event_paranoid(void)
@@ -394,6 +286,14 @@
return value;
}
+
+bool perf_event_paranoid_check(int max_level)
+{
+ return perf_cap__capable(CAP_SYS_ADMIN) ||
+ perf_cap__capable(CAP_PERFMON) ||
+ perf_event_paranoid() <= max_level;
+}
+
static int
fetch_ubuntu_kernel_version(unsigned int *puint)
{
@@ -479,30 +379,40 @@
return 0;
}
-const char *perf_tip(const char *dirpath)
+int perf_tip(char **strp, const char *dirpath)
{
struct strlist *tips;
struct str_node *node;
- char *tip = NULL;
struct strlist_config conf = {
.dirname = dirpath,
.file_only = true,
};
+ int ret = 0;
+ *strp = NULL;
tips = strlist__new("tips.txt", &conf);
if (tips == NULL)
- return errno == ENOENT ? NULL :
- "Tip: check path of tips.txt or get more memory! ;-p";
+ return -errno;
if (strlist__nr_entries(tips) == 0)
goto out;
node = strlist__entry(tips, random() % strlist__nr_entries(tips));
- if (asprintf(&tip, "Tip: %s", node->s) < 0)
- tip = (char *)"Tip: get more memory! ;-)";
+ if (asprintf(strp, "Tip: %s", node->s) < 0)
+ ret = -ENOMEM;
out:
strlist__delete(tips);
- return tip;
+ return ret;
+}
+
+char *perf_exe(char *buf, int len)
+{
+ int n = readlink("/proc/self/exe", buf, len);
+ if (n > 0) {
+ buf[n] = 0;
+ return buf;
+ }
+ return strcpy(buf, "perf");
}
--
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