Similar to '%pD' for printk, use '%pD' for print struct file's name.
Signed-off-by: Ye Bin <yebi...@huawei.com>
---
kernel/trace/trace_probe.c | 57 +++++++++++++++++++++++---------------
1 file changed, 35 insertions(+), 22 deletions(-)
diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c
index 0c1caf0f474a..5ac7b0193dd8 100644
--- a/kernel/trace/trace_probe.c
+++ b/kernel/trace/trace_probe.c
@@ -12,6 +12,7 @@
#define pr_fmt(fmt) "trace_probe: " fmt
#include <linux/bpf.h>
+#include <linux/fs.h>
#include "trace_btf.h"
#include "trace_probe.h"
@@ -1577,35 +1578,47 @@ int traceprobe_expand_dentry_args(int argc, const char
*argv[], char **buf)
used = 0;
for (i = 0; i < argc; i++) {
- if (glob_match("*:%pd", argv[i])) {
- char *tmp;
- char *equal;
-
- if (!tmpbuf) {
- tmpbuf = kmalloc(bufsize, GFP_KERNEL);
- if (!tmpbuf)
- return -ENOMEM;
- }
+ char *tmp;
+ char *equal;
+ size_t arg_len;
- tmp = kstrdup(argv[i], GFP_KERNEL);
- if (!tmp)
- goto nomem;
+ if (!glob_match("*:%p[dD]", argv[i]))
+ continue;
- equal = strchr(tmp, '=');
- if (equal)
- *equal = '\0';
- tmp[strlen(argv[i]) - 4] = '\0';
+ if (!tmpbuf) {
+ tmpbuf = kmalloc(bufsize, GFP_KERNEL);
+ if (!tmpbuf)
+ return -ENOMEM;
+ }
+
+ tmp = kstrdup(argv[i], GFP_KERNEL);
+ if (!tmp)
+ goto nomem;
+
+ equal = strchr(tmp, '=');
+ if (equal)
+ *equal = '\0';
+ arg_len = strlen(argv[i]);
+ tmp[arg_len - 4] = '\0';
+ if (argv[i][arg_len - 1] == 'd')
ret = snprintf(tmpbuf + used, bufsize - used,
"%s%s+0x0(+0x%zx(%s)):string",
equal ? tmp : "", equal ? "=" : "",
offsetof(struct dentry, d_name.name),
equal ? equal + 1 : tmp);
- kfree(tmp);
- if (ret >= bufsize - used)
- goto nomem;
- argv[i] = tmpbuf + used;
- used += ret + 1;
- }
+ else
+ ret = snprintf(tmpbuf + used, bufsize - used,
+ "%s%s+0x0(+0x%zx(+0x%zx(%s))):string",
+ equal ? tmp : "", equal ? "=" : "",
+ offsetof(struct dentry, d_name.name),
+ offsetof(struct file, f_path.dentry),
+ equal ? equal + 1 : tmp);
+
+ kfree(tmp);
+ if (ret >= bufsize - used)
+ goto nomem;
+ argv[i] = tmpbuf + used;
+ used += ret + 1;
}
*buf = tmpbuf;
--
2.31.1
