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-rw-r--r--fs/seq_file.c42
-rw-r--r--include/linux/seq_file.h4
2 files changed, 46 insertions, 0 deletions
diff --git a/fs/seq_file.c b/fs/seq_file.c
index ce9e39fd5daf..263b125dbcf4 100644
--- a/fs/seq_file.c
+++ b/fs/seq_file.c
@@ -12,6 +12,7 @@
#include <linux/slab.h>
#include <linux/cred.h>
#include <linux/mm.h>
+#include <linux/printk.h>
#include <asm/uaccess.h>
#include <asm/page.h>
@@ -773,6 +774,47 @@ void seq_pad(struct seq_file *m, char c)
}
EXPORT_SYMBOL(seq_pad);
+/* A complete analogue of print_hex_dump() */
+void seq_hex_dump(struct seq_file *m, const char *prefix_str, int prefix_type,
+ int rowsize, int groupsize, const void *buf, size_t len,
+ bool ascii)
+{
+ const u8 *ptr = buf;
+ int i, linelen, remaining = len;
+ int ret;
+
+ if (rowsize != 16 && rowsize != 32)
+ rowsize = 16;
+
+ for (i = 0; i < len && !seq_has_overflowed(m); i += rowsize) {
+ linelen = min(remaining, rowsize);
+ remaining -= rowsize;
+
+ switch (prefix_type) {
+ case DUMP_PREFIX_ADDRESS:
+ seq_printf(m, "%s%p: ", prefix_str, ptr + i);
+ break;
+ case DUMP_PREFIX_OFFSET:
+ seq_printf(m, "%s%.8x: ", prefix_str, i);
+ break;
+ default:
+ seq_printf(m, "%s", prefix_str);
+ break;
+ }
+
+ ret = hex_dump_to_buffer(ptr + i, linelen, rowsize, groupsize,
+ m->buf + m->count, m->size - m->count,
+ ascii);
+ if (ret >= m->size - m->count) {
+ seq_set_overflow(m);
+ } else {
+ m->count += ret;
+ seq_putc(m, '\n');
+ }
+ }
+}
+EXPORT_SYMBOL(seq_hex_dump);
+
struct list_head *seq_list_start(struct list_head *head, loff_t pos)
{
struct list_head *lh;
diff --git a/include/linux/seq_file.h b/include/linux/seq_file.h
index d4c7271382cb..adeadbd6d7bf 100644
--- a/include/linux/seq_file.h
+++ b/include/linux/seq_file.h
@@ -122,6 +122,10 @@ int seq_write(struct seq_file *seq, const void *data, size_t len);
__printf(2, 3) int seq_printf(struct seq_file *, const char *, ...);
__printf(2, 0) int seq_vprintf(struct seq_file *, const char *, va_list args);
+void seq_hex_dump(struct seq_file *m, const char *prefix_str, int prefix_type,
+ int rowsize, int groupsize, const void *buf, size_t len,
+ bool ascii);
+
int seq_path(struct seq_file *, const struct path *, const char *);
int seq_file_path(struct seq_file *, struct file *, const char *);
int seq_dentry(struct seq_file *, struct dentry *, const char *);