Similar to '%pD' for printk, use '%pD' for print struct file's name.
Signed-off-by: Ye Bin <[email protected]>
---
kernel/trace/trace_probe.c | 41 ++++++++++++++++++++++++--------------
1 file changed, 26 insertions(+), 15 deletions(-)
diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c
index cc8bd7ea5341..a664633137a0 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"
@@ -1574,28 +1575,38 @@ int traceprobe_expand_dentry_args(int argc, const char *argv[], char *buf,
for (i = 0; i < argc; i++) {
size_t idx;
- if (str_has_suffix(argv[i], ":%pd", &idx)) {
- char *tmp = kstrdup(argv[i], GFP_KERNEL);
- char *equal;
+ if (!str_has_suffix(argv[i], ":%pd", &idx) &&
+ !str_has_suffix(argv[i], ":%pD", &idx))
+ continue;
- if (!tmp)
- return -ENOMEM;
+ char *tmp = kstrdup(argv[i], GFP_KERNEL);
+ char *equal;
+
+ if (!tmp)
+ return -ENOMEM;
- equal = strchr(tmp, '=');
- if (equal)
- *equal = '\0';
- tmp[idx] = '\0';
+ equal = strchr(tmp, '=');
+ if (equal)
+ *equal = '\0';
+ tmp[idx] = '\0';
+ if (argv[i][idx + 3] == 'd')
ret = snprintf(buf + 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)
- return -ENOMEM;
- argv[i] = buf + used;
- used += ret + 1;
- }
+ else
+ ret = snprintf(buf + 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)
+ return -ENOMEM;
+ argv[i] = buf + used;
+ used += ret + 1;
}
return 0;
--
2.31.1