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authorPetr Mladek <pmladek@suse.com>2021-04-27 14:31:38 +0200
committerPetr Mladek <pmladek@suse.com>2021-04-27 14:31:38 +0200
commitda34b03fbd0a6e58770d5fe00830674633a57d60 (patch)
treeccb97e2c2b0ae6421c5d79c25e8b8869006ce6d1 /lib
parent84696cfaf4d90945eb2a8302edc6cf627db56b84 (diff)
parentc244297acbe51f1db5764966c02cdbd69927f218 (diff)
downloadlinux-da34b03fbd0a6e58770d5fe00830674633a57d60.tar.gz
Merge branch 'for-5.13-vsprintf-pgp' into for-linus
Diffstat (limited to 'lib')
-rw-r--r--lib/test_printf.c90
-rw-r--r--lib/vsprintf.c66
2 files changed, 141 insertions, 15 deletions
diff --git a/lib/test_printf.c b/lib/test_printf.c
index 95a2f82427c7..27b964ec723d 100644
--- a/lib/test_printf.c
+++ b/lib/test_printf.c
@@ -577,24 +577,98 @@ netdev_features(void)
{
}
+struct page_flags_test {
+ int width;
+ int shift;
+ int mask;
+ unsigned long value;
+ const char *fmt;
+ const char *name;
+};
+
+static struct page_flags_test pft[] = {
+ {SECTIONS_WIDTH, SECTIONS_PGSHIFT, SECTIONS_MASK,
+ 0, "%d", "section"},
+ {NODES_WIDTH, NODES_PGSHIFT, NODES_MASK,
+ 0, "%d", "node"},
+ {ZONES_WIDTH, ZONES_PGSHIFT, ZONES_MASK,
+ 0, "%d", "zone"},
+ {LAST_CPUPID_WIDTH, LAST_CPUPID_PGSHIFT, LAST_CPUPID_MASK,
+ 0, "%#x", "lastcpupid"},
+ {KASAN_TAG_WIDTH, KASAN_TAG_PGSHIFT, KASAN_TAG_MASK,
+ 0, "%#x", "kasantag"},
+};
+
+static void __init
+page_flags_test(int section, int node, int zone, int last_cpupid,
+ int kasan_tag, int flags, const char *name, char *cmp_buf)
+{
+ unsigned long values[] = {section, node, zone, last_cpupid, kasan_tag};
+ unsigned long page_flags = 0;
+ unsigned long size = 0;
+ bool append = false;
+ int i;
+
+ flags &= BIT(NR_PAGEFLAGS) - 1;
+ if (flags) {
+ page_flags |= flags;
+ snprintf(cmp_buf + size, BUF_SIZE - size, "%s", name);
+ size = strlen(cmp_buf);
+#if SECTIONS_WIDTH || NODES_WIDTH || ZONES_WIDTH || \
+ LAST_CPUPID_WIDTH || KASAN_TAG_WIDTH
+ /* Other information also included in page flags */
+ snprintf(cmp_buf + size, BUF_SIZE - size, "|");
+ size = strlen(cmp_buf);
+#endif
+ }
+
+ /* Set the test value */
+ for (i = 0; i < ARRAY_SIZE(pft); i++)
+ pft[i].value = values[i];
+
+ for (i = 0; i < ARRAY_SIZE(pft); i++) {
+ if (!pft[i].width)
+ continue;
+
+ if (append) {
+ snprintf(cmp_buf + size, BUF_SIZE - size, "|");
+ size = strlen(cmp_buf);
+ }
+
+ page_flags |= (pft[i].value & pft[i].mask) << pft[i].shift;
+ snprintf(cmp_buf + size, BUF_SIZE - size, "%s=", pft[i].name);
+ size = strlen(cmp_buf);
+ snprintf(cmp_buf + size, BUF_SIZE - size, pft[i].fmt,
+ pft[i].value & pft[i].mask);
+ size = strlen(cmp_buf);
+ append = true;
+ }
+
+ test(cmp_buf, "%pGp", &page_flags);
+}
+
static void __init
flags(void)
{
unsigned long flags;
- gfp_t gfp;
char *cmp_buffer;
+ gfp_t gfp;
+
+ cmp_buffer = kmalloc(BUF_SIZE, GFP_KERNEL);
+ if (!cmp_buffer)
+ return;
flags = 0;
- test("", "%pGp", &flags);
+ page_flags_test(0, 0, 0, 0, 0, flags, "", cmp_buffer);
- /* Page flags should filter the zone id */
flags = 1UL << NR_PAGEFLAGS;
- test("", "%pGp", &flags);
+ page_flags_test(0, 0, 0, 0, 0, flags, "", cmp_buffer);
flags |= 1UL << PG_uptodate | 1UL << PG_dirty | 1UL << PG_lru
| 1UL << PG_active | 1UL << PG_swapbacked;
- test("uptodate|dirty|lru|active|swapbacked", "%pGp", &flags);
-
+ page_flags_test(1, 1, 1, 0x1fffff, 1, flags,
+ "uptodate|dirty|lru|active|swapbacked",
+ cmp_buffer);
flags = VM_READ | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC
| VM_DENYWRITE;
@@ -609,10 +683,6 @@ flags(void)
gfp = __GFP_ATOMIC;
test("__GFP_ATOMIC", "%pGg", &gfp);
- cmp_buffer = kmalloc(BUF_SIZE, GFP_KERNEL);
- if (!cmp_buffer)
- return;
-
/* Any flags not translated by the table should remain numeric */
gfp = ~__GFP_BITS_MASK;
snprintf(cmp_buffer, BUF_SIZE, "%#lx", (unsigned long) gfp);
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 7caf619ee9c2..6c56c62fd9a5 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -1916,6 +1916,66 @@ char *format_flags(char *buf, char *end, unsigned long flags,
return buf;
}
+struct page_flags_fields {
+ int width;
+ int shift;
+ int mask;
+ const struct printf_spec *spec;
+ const char *name;
+};
+
+static const struct page_flags_fields pff[] = {
+ {SECTIONS_WIDTH, SECTIONS_PGSHIFT, SECTIONS_MASK,
+ &default_dec_spec, "section"},
+ {NODES_WIDTH, NODES_PGSHIFT, NODES_MASK,
+ &default_dec_spec, "node"},
+ {ZONES_WIDTH, ZONES_PGSHIFT, ZONES_MASK,
+ &default_dec_spec, "zone"},
+ {LAST_CPUPID_WIDTH, LAST_CPUPID_PGSHIFT, LAST_CPUPID_MASK,
+ &default_flag_spec, "lastcpupid"},
+ {KASAN_TAG_WIDTH, KASAN_TAG_PGSHIFT, KASAN_TAG_MASK,
+ &default_flag_spec, "kasantag"},
+};
+
+static
+char *format_page_flags(char *buf, char *end, unsigned long flags)
+{
+ unsigned long main_flags = flags & (BIT(NR_PAGEFLAGS) - 1);
+ bool append = false;
+ int i;
+
+ /* Page flags from the main area. */
+ if (main_flags) {
+ buf = format_flags(buf, end, main_flags, pageflag_names);
+ append = true;
+ }
+
+ /* Page flags from the fields area */
+ for (i = 0; i < ARRAY_SIZE(pff); i++) {
+ /* Skip undefined fields. */
+ if (!pff[i].width)
+ continue;
+
+ /* Format: Flag Name + '=' (equals sign) + Number + '|' (separator) */
+ if (append) {
+ if (buf < end)
+ *buf = '|';
+ buf++;
+ }
+
+ buf = string(buf, end, pff[i].name, default_str_spec);
+ if (buf < end)
+ *buf = '=';
+ buf++;
+ buf = number(buf, end, (flags >> pff[i].shift) & pff[i].mask,
+ *pff[i].spec);
+
+ append = true;
+ }
+
+ return buf;
+}
+
static noinline_for_stack
char *flags_string(char *buf, char *end, void *flags_ptr,
struct printf_spec spec, const char *fmt)
@@ -1928,11 +1988,7 @@ char *flags_string(char *buf, char *end, void *flags_ptr,
switch (fmt[1]) {
case 'p':
- flags = *(unsigned long *)flags_ptr;
- /* Remove zone id */
- flags &= (1UL << NR_PAGEFLAGS) - 1;
- names = pageflag_names;
- break;
+ return format_page_flags(buf, end, *(unsigned long *)flags_ptr);
case 'v':
flags = *(unsigned long *)flags_ptr;
names = vmaflag_names;