Merge pull request #1767 from pchaigno/fix-xfsslower

xfsslower: Fix compilation error due to rewriter update

tools/xfsslower.py

@@ -187,10 +187,7 @@ static int trace_return(struct pt_regs *ctx, int type)
     bpf_get_current_comm(&data.task, sizeof(data.task));
 
     // workaround (rewriter should handle file to d_name in one step):
-    struct dentry *de = NULL;
-    struct qstr qs = {};
-    bpf_probe_read(&de, sizeof(de), &valp->fp->f_path.dentry);
-    bpf_probe_read(&qs, sizeof(qs), (void *)&de->d_name);
+    struct qstr qs = valp->fp->f_path.dentry->d_name;
     if (qs.len == 0)
         return 0;
     bpf_probe_read(&data.file, sizeof(data.file), (void *)qs.name);

tools/zfsslower.py

@@ -190,11 +190,7 @@ static int trace_return(struct pt_regs *ctx, int type)
     data.offset = valp->offset;
     bpf_get_current_comm(&data.task, sizeof(data.task));
 
-    // workaround (rewriter should handle file to d_name in one step):
-    struct dentry *de = NULL;
-    struct qstr qs = {};
-    bpf_probe_read(&de, sizeof(de), &valp->fp->f_path.dentry);
-    bpf_probe_read(&qs, sizeof(qs), (void *)&de->d_name);
+    struct qstr qs = valp->fp->f_path.dentry->d_name;
     if (qs.len == 0)
         return 0;
     bpf_probe_read(&data.file, sizeof(data.file), (void *)qs.name);