Similar to printk() '%pd' is for fetch dentry's name from struct dentry's
pointer, and '%pD' is for fetch file's name from struct file's pointer.
Signed-off-by: Ye Bin <yebi...@huawei.com>
---
Documentation/trace/kprobetrace.rst | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/Documentation/trace/kprobetrace.rst
b/Documentation/trace/kprobetrace.rst
index bf9cecb69fc9..a1d12d65a8dc 100644
--- a/Documentation/trace/kprobetrace.rst
+++ b/Documentation/trace/kprobetrace.rst
@@ -58,7 +58,8 @@ Synopsis of kprobe_events
NAME=FETCHARG : Set NAME as the argument name of FETCHARG.
FETCHARG:TYPE : Set TYPE as the type of FETCHARG. Currently, basic types
(u8/u16/u32/u64/s8/s16/s32/s64), hexadecimal types
- (x8/x16/x32/x64), "char", "string", "ustring", "symbol",
"symstr"
+ (x8/x16/x32/x64), VFS layer common type(%pd/%pD) for print
+ file name, "char", "string", "ustring", "symbol", "symstr"
and bitfield are supported.
(\*1) only for the probe on function entry (offs == 0). Note, this argument
access
@@ -113,6 +114,9 @@ With 'symstr' type, you can filter the event with wildcard
pattern of the
symbols, and you don't need to solve symbol name by yourself.
For $comm, the default type is "string"; any other type is invalid.
+VFS layer common type(%pd/%pD) is a special type, which fetches dentry's or
+file's name from struct dentry's pointer or struct file's pointer.
+
.. _user_mem_access:
User Memory Access
--
2.31.1
