[hurd] 41/64: libtrivfs: add payload-aware intrans functions

[Samuel Thibault]

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sthibault pushed a commit to branch upstream
in repository hurd.

commit 831a341d6b32d1005c6667e71aec9f67c3d48456
Author: Justus Winter <address@hidden>
Date:   Thu Nov 28 11:04:38 2013 +0100

    libtrivfs: add payload-aware intrans functions
    
    * libtrivfs/mig-decls.h (trivfs_begin_using_protid_payload): New function.
    (trivfs_begin_using_control_payload): Likewise.
    * libtrivfs/mig-mutate.h: Add mutators.
---
 libtrivfs/mig-decls.h  | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++
 libtrivfs/mig-mutate.h |  3 +++
 2 files changed, 61 insertions(+)

diff --git a/libtrivfs/mig-decls.h b/libtrivfs/mig-decls.h
index 2baaee8..13a9eb7 100644
--- a/libtrivfs/mig-decls.h
+++ b/libtrivfs/mig-decls.h
@@ -61,6 +61,35 @@ trivfs_begin_using_protid (mach_port_t port)
     return ports_lookup_port (0, port, trivfs_dynamic_protid_port_classes[0]);
 }
 
+static inline struct trivfs_protid * __attribute__ ((unused))
+trivfs_begin_using_protid_payload (unsigned long payload)
+{
+  if (trivfs_protid_nportclasses + trivfs_num_dynamic_protid_port_classes > 1)
+    {
+      struct port_info *pi = ports_lookup_payload (NULL, payload, NULL);
+      int i;
+
+      if (pi)
+       {
+         for (i = 0; i < trivfs_protid_nportclasses; i++)
+           if (pi->class == trivfs_protid_portclasses[i])
+             return (struct trivfs_protid *) pi;
+         for (i = 0; i < trivfs_num_dynamic_protid_port_classes; i++)
+           if (pi->class == trivfs_dynamic_protid_port_classes[i])
+             return (struct trivfs_protid *) pi;
+         ports_port_deref (pi);
+       }
+
+      return NULL;
+    }
+  else if (trivfs_protid_nportclasses == 1)
+    return ports_lookup_payload (NULL, payload,
+                                trivfs_protid_portclasses[0]);
+  else
+    return ports_lookup_payload (NULL, payload,
+                                trivfs_dynamic_protid_port_classes[0]);
+}
+
 static inline void __attribute__ ((unused))
 trivfs_end_using_protid (struct trivfs_protid *cred)
 {
@@ -95,6 +124,35 @@ trivfs_begin_using_control (mach_port_t port)
     return ports_lookup_port (0, port, trivfs_dynamic_control_port_classes[0]);
 }
 
+static inline struct trivfs_control * __attribute__ ((unused))
+trivfs_begin_using_control_payload (unsigned long payload)
+{
+  if (trivfs_cntl_nportclasses + trivfs_num_dynamic_control_port_classes > 1)
+    {
+      struct port_info *pi = ports_lookup_payload (NULL, payload, NULL);
+      int i;
+
+      if (pi)
+       {
+         for (i = 0; i < trivfs_cntl_nportclasses; i++)
+           if (pi->class == trivfs_cntl_portclasses[i])
+             return (struct trivfs_control *) pi;
+         for (i = 0; i < trivfs_num_dynamic_control_port_classes; i++)
+           if (pi->class == trivfs_dynamic_control_port_classes[i])
+             return (struct trivfs_control *) pi;
+         ports_port_deref (pi);
+       }
+
+      return NULL;
+    }
+  else if (trivfs_cntl_nportclasses == 1)
+    return ports_lookup_payload (NULL, payload,
+                                trivfs_cntl_portclasses[0]);
+  else
+    return ports_lookup_payload (NULL, payload,
+                                trivfs_dynamic_control_port_classes[0]);
+}
+
 static inline void __attribute__ ((unused))
 trivfs_end_using_control (struct trivfs_control *cred)
 {
diff --git a/libtrivfs/mig-mutate.h b/libtrivfs/mig-mutate.h
index cc15d38..dcbebf6 100644
--- a/libtrivfs/mig-mutate.h
+++ b/libtrivfs/mig-mutate.h
@@ -20,13 +20,16 @@
 #define REPLY_PORTS
 
 #define FILE_INTRAN trivfs_protid_t trivfs_begin_using_protid (file_t)
+#define FILE_INTRAN_PAYLOAD trivfs_protid_t trivfs_begin_using_protid_payload
 #define FILE_DESTRUCTOR trivfs_end_using_protid (trivfs_protid_t)
 #define FILE_IMPORTS import "libtrivfs/mig-decls.h";
 
 #define IO_INTRAN trivfs_protid_t trivfs_begin_using_protid (io_t)
+#define IO_INTRAN_PAYLOAD trivfs_protid_t trivfs_begin_using_protid_payload
 #define IO_DESTRUCTOR trivfs_end_using_protid (trivfs_protid_t)
 #define IO_IMPORTS import "libtrivfs/mig-decls.h";
 
 #define FSYS_INTRAN trivfs_control_t trivfs_begin_using_control (fsys_t)
+#define FSYS_INTRAN_PAYLOAD trivfs_control_t trivfs_begin_using_control_payload
 #define FSYS_DESTRUCTOR trivfs_end_using_control (trivfs_control_t)
 #define FSYS_IMPORTS import "libtrivfs/mig-decls.h";

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