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| author |   Piotr Maziarz <piotrx.maziarz@linux.intel.com> | 2019-11-07 13:45:37 +0100 |
|---|---|---|
| committer |   Steven Rostedt (VMware) <rostedt@goodmis.org> | 2019-11-14 13:15:12 -0500 |
| commit | 353cade3149c27b53260932ee3ff1ebde405976d (patch) | |
| tree | dc109cd70ca402efe1e42b6c4fe5b814b39ecf71 /include/linux/seq_buf.h | |
| parent | tracing/kprobe: Check whether the non-suffixed symbol is notrace (diff) | |
| download | wireguard-linux-353cade3149c27b53260932ee3ff1ebde405976d.tar.xz wireguard-linux-353cade3149c27b53260932ee3ff1ebde405976d.zip | |
seq_buf: Add printing formatted hex dumps
Provided function is an analogue of print_hex_dump().
Implementing this function in seq_buf allows using for multiple
purposes (e.g. for tracing) and therefore prevents from code duplication
in every layer that uses seq_buf.
print_hex_dump() is an essential part of logging data to dmesg. Adding
similar capability for other purposes is beneficial to all users.
Example usage:
seq_buf_hex_dump(seq, "", DUMP_PREFIX_OFFSET, 16, 4, buf,
ARRAY_SIZE(buf), true);
Example output:
00000000: 00000000 ffffff10 ffffff32 ffff3210 ........2....2..
00000010: ffff3210 83d00437 c0700000 00000000 .2..7.....p.....
00000020: 02010004 0000000f 0000000f 00004002 .............@..
00000030: 00000fff 00000000 ........
Link: http://lkml.kernel.org/r/1573130738-29390-1-git-send-email-piotrx.maziarz@linux.intel.com
Signed-off-by: Piotr Maziarz <piotrx.maziarz@linux.intel.com>
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'include/linux/seq_buf.h')
| -rw-r--r-- | include/linux/seq_buf.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/seq_buf.h b/include/linux/seq_buf.h index aa5deb041c25..fb0205d87d3c 100644 --- a/include/linux/seq_buf.h +++ b/include/linux/seq_buf.h @@ -125,6 +125,9 @@ extern int seq_buf_putmem(struct seq_buf *s, const void *mem, unsigned int len); extern int seq_buf_putmem_hex(struct seq_buf *s, const void *mem, unsigned int len); extern int seq_buf_path(struct seq_buf *s, const struct path *path, const char *esc); +extern int seq_buf_hex_dump(struct seq_buf *s, const char *prefix_str, + int prefix_type, int rowsize, int groupsize, + const void *buf, size_t len, bool ascii); #ifdef CONFIG_BINARY_PRINTF extern int |