Remove unused parameter from the 'get_source' machinery.

* libdiskfs/diskfs.h (diskfs_get_source): Remove first parameter.
* libdiskfs/file-get-source.c (diskfs_S_file_get_source): Adapt
callsite.
* libdiskfs/get-source.c (diskfs_get_source): Adapt default
implementation.
* libnetfs/netfs.h (netfs_get_source): Remove first parameter.
* libnetfs/file-get-source.c (netfs_S_file_get_source): Adapt
callsite.
* libnetfs/get-source.c (netfs_get_source): Adapt default
implementation.
* libtrivfs/trivfs.h (trivfs_get_source): Remove first parameter.
* libtrivfs/file-get-source.c (trivfs_S_file_get_source): Adapt
callsite.
* libtrivfs/get-source.c (trivfs_get_source): Adapt default
implementation.
* nfs/main.c (netfs_get_source): Adapt implementation.
* procfs/main.c (netfs_get_source): Likewise.
* trans/firmlink.c (trivfs_get_source): Likewise.

12 files changed, 29 insertions, 37 deletions

diff --git a/libdiskfs/diskfs.h b/libdiskfs/diskfs.h
index 0e148523..40af37a9 100644
--- a/libdiskfs/diskfs.h
+++ b/libdiskfs/diskfs.h
@@ -586,11 +586,11 @@ error_t (*diskfs_create_symlink_hook)(struct node *np, const char *target);
 error_t (*diskfs_read_symlink_hook)(struct node *np, char *target);
 
 /* The user may define this function.  The function must set source to
-   the source of CRED. The function may return an EOPNOTSUPP to
-   indicate that the concept of a source device is not applicable. The
-   default function always returns EOPNOTSUPP. */
-error_t diskfs_get_source (struct protid *cred,
-                           char *source, size_t source_len);
+   the source of the translator. The function may return an EOPNOTSUPP
+   to indicate that the concept of a source device is not
+   applicable. The default function always returns diskfs_disk_name,
+   or EOPNOTSUPP if it is NULL. */
+error_t diskfs_get_source (char *source, size_t source_len);
 
 /* Libdiskfs contains a node cache.
 
diff --git a/libdiskfs/file-get-source.c b/libdiskfs/file-get-source.c
index b5c31845..d983a826 100644
--- a/libdiskfs/file-get-source.c
+++ b/libdiskfs/file-get-source.c
@@ -33,5 +33,5 @@ diskfs_S_file_get_source (struct protid *cred,
       || cred->pi.class != diskfs_protid_class)
     return EOPNOTSUPP;
 
-  return diskfs_get_source (cred, source, 1024 /* XXX */);
+  return diskfs_get_source (source, 1024 /* XXX */);
 }
diff --git a/libdiskfs/get-source.c b/libdiskfs/get-source.c
index 2ef8ebcd..9962ee9e 100644
--- a/libdiskfs/get-source.c
+++ b/libdiskfs/get-source.c
@@ -22,7 +22,7 @@
 #include "priv.h"
 
 error_t __attribute__ ((weak))
-diskfs_get_source (struct protid *cred, char *source, size_t source_len)
+diskfs_get_source (char *source, size_t source_len)
 {
   if (diskfs_disk_name == NULL)
     return EOPNOTSUPP;
diff --git a/libnetfs/file-get-source.c b/libnetfs/file-get-source.c
index 7fa1b4f6..acd32306 100644
--- a/libnetfs/file-get-source.c
+++ b/libnetfs/file-get-source.c
@@ -31,5 +31,5 @@ netfs_S_file_get_source (struct protid *cred,
   if (! cred)
     return EOPNOTSUPP;
 
-  return netfs_get_source (cred, source, 1024 /* XXX */);
+  return netfs_get_source (source, 1024 /* XXX */);
 }
diff --git a/libnetfs/get-source.c b/libnetfs/get-source.c
index 5a234bce..cf237444 100644
--- a/libnetfs/get-source.c
+++ b/libnetfs/get-source.c
@@ -22,7 +22,7 @@
 #include "priv.h"
 
 error_t __attribute__ ((weak))
-netfs_get_source (struct protid *cred, char *source, size_t source_len)
+netfs_get_source (char *source, size_t source_len)
 {
   return EOPNOTSUPP;
 }
diff --git a/libnetfs/netfs.h b/libnetfs/netfs.h
index afd4a060..5b5ca93b 100644
--- a/libnetfs/netfs.h
+++ b/libnetfs/netfs.h
@@ -320,11 +320,10 @@ error_t netfs_file_get_storage_info (struct iouser *cred,
 				     mach_msg_type_number_t *data_len);
 
 /* The user may define this function.  The function must set source to
-   the source of CRED. The function may return an EOPNOTSUPP to
-   indicate that the concept of a source device is not applicable. The
-   default function always returns EOPNOTSUPP. */
-error_t netfs_get_source (struct protid *cred,
-                          char *source, size_t source_len);
+   the source of the translator. The function may return an EOPNOTSUPP
+   to indicate that the concept of a source device is not
+   applicable. The default function always returns EOPNOTSUPP.  */
+error_t netfs_get_source (char *source, size_t source_len);
 
 /* Option parsing */
 
diff --git a/libtrivfs/file-get-source.c b/libtrivfs/file-get-source.c
index f6637d87..c2420fb8 100644
--- a/libtrivfs/file-get-source.c
+++ b/libtrivfs/file-get-source.c
@@ -30,5 +30,5 @@ trivfs_S_file_get_source (struct trivfs_protid *cred,
 			  mach_msg_type_name_t replyPoly,
 			  char *source)
 {
-  return cred? trivfs_get_source (cred, source, 1024 /* XXX */): EOPNOTSUPP;
+  return cred ? trivfs_get_source (source, 1024 /* XXX */) : EOPNOTSUPP;
 }
diff --git a/libtrivfs/get-source.c b/libtrivfs/get-source.c
index 1b3ce11d..1f772000 100644
--- a/libtrivfs/get-source.c
+++ b/libtrivfs/get-source.c
@@ -22,7 +22,7 @@
 #include "priv.h"
 
 error_t __attribute__ ((weak))
-trivfs_get_source (struct trivfs_protid *cred, char *source, size_t source_len)
+trivfs_get_source (char *source, size_t source_len)
 {
   return EOPNOTSUPP;
 }
diff --git a/libtrivfs/trivfs.h b/libtrivfs/trivfs.h
index 49cc765f..ddeb29a8 100644
--- a/libtrivfs/trivfs.h
+++ b/libtrivfs/trivfs.h
@@ -215,12 +215,11 @@ error_t trivfs_set_options (struct trivfs_control *fsys,
 error_t trivfs_append_args (struct trivfs_control *fsys,
 			    char **argz, size_t *argz_len);
 
-/* The user may define this function.  The function must set source to
-   the source device of CRED. The function may return an EOPNOTSUPP to
-   indicate that the concept of a source device is not applicable. The
-   default function always returns EOPNOTSUPP. */
-error_t trivfs_get_source (struct trivfs_protid *cred,
-                           char *source, size_t source_len);
+/* The user may define this function.  The function must set SOURCE to
+   the source of the translator. The function may return an EOPNOTSUPP
+   to indicate that the concept of a source device is not
+   applicable. The default function always returns EOPNOTSUPP. */
+error_t trivfs_get_source (char *source, size_t source_len);
 
 /* Add the port class *CLASS to the list of control port classes recognized
    by trivfs; if *CLASS is 0, an attempt is made to allocate a new port
diff --git a/nfs/main.c b/nfs/main.c
index cd1c29a0..c98eb567 100644
--- a/nfs/main.c
+++ b/nfs/main.c
@@ -270,15 +270,12 @@ netfs_append_args (char **argz, size_t *argz_len)
 }
 
 /* The user may define this function.  The function must set source to
-   the source of CRED. The function may return an EOPNOTSUPP to
-   indicate that the concept of a source device is not applicable. The
-   default function always returns EOPNOTSUPP. */
+   the source of the translator. The function may return an EOPNOTSUPP
+   to indicate that the concept of a source device is not
+   applicable. The default function always returns EOPNOTSUPP.  */
 error_t
-netfs_get_source (struct protid *cred, char *source, size_t source_len)
+netfs_get_source (char *source, size_t source_len)
 {
-  if (! cred)
-    return EOPNOTSUPP;
-
   snprintf (source, source_len, "%s:%s", host, remote_fs);
   return 0;
 }
diff --git a/procfs/main.c b/procfs/main.c
index 0c87175a..e9e29123 100644
--- a/procfs/main.c
+++ b/procfs/main.c
@@ -254,13 +254,11 @@ netfs_append_args (char **argz, size_t *argz_len)
 }
 
 /* The user may define this function.  The function must set source to
-   the source of CRED. The function may return an EOPNOTSUPP to
-   indicate that the concept of a source device is not applicable. The
-   default function always returns EOPNOTSUPP. */
-error_t netfs_get_source (struct protid *cred, char *source, size_t source_len)
+   the source of the translator. The function may return an EOPNOTSUPP
+   to indicate that the concept of a source device is not
+   applicable. The default function always returns EOPNOTSUPP.  */
+error_t netfs_get_source (char *source, size_t source_len)
 {
-  if (! cred)
-    return EOPNOTSUPP;
   snprintf (source, source_len, "proc");
   return 0;
 }
diff --git a/trans/firmlink.c b/trans/firmlink.c
index 19382f10..ca094ecf 100644
--- a/trans/firmlink.c
+++ b/trans/firmlink.c
@@ -287,8 +287,7 @@ trivfs_S_io_select_timeout (struct trivfs_protid *cred,
   return trivfs_S_io_select (cred, reply, reply_type, type);
 }
 
-error_t trivfs_get_source (struct trivfs_protid *cred,
-			   char *source, size_t source_len)
+error_t trivfs_get_source (char *source, size_t source_len)
 {
   strncpy (source, target, source_len - 1);
   source[source_len -1 ] = '\0';