-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
/*
* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2012, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
*/
#define DEBUG_SUBSYSTEM S_CLASS
-#define D_KUC 0
+#define D_KUC D_OTHER
#include <libcfs/libcfs.h>
if (pipe(pfd) < 0)
return -errno;
+ memset(link, 0, sizeof(*link));
link->lk_rfd = pfd[0];
link->lk_wfd = pfd[1];
link->lk_group = group;
* Allocates memory, returns handle
*
* @param link Private descriptor for pipe/socket.
- * @param buf Buffer to read into
+ * @param buf Buffer to read into, must include size for kuc_hdr
* @param maxsize Maximum message size allowed
* @param transport Only listen to messages on this transport
* (and the generic transport)
}
kuch = (struct kuc_hdr *)buf;
- CDEBUG(D_KUC, " Received message mg=%x t=%d m=%d l=%d\n",
+ CDEBUG(D_KUC, "Received message mg=%x t=%d m=%d l=%d\n",
kuch->kuc_magic, kuch->kuc_transport, kuch->kuc_msgtype,
kuch->kuc_msglen);
}
#ifdef __KERNEL__
- rc = cfs_user_write(filp, (char *)payload, kuch->kuc_msglen, 0);
+ {
+ loff_t offset = 0;
+ rc = cfs_user_write(filp, (char *)payload, kuch->kuc_msglen,
+ &offset);
+ }
#endif
if (rc < 0)
cfs_list_t kr_chain;
int kr_uid;
cfs_file_t *kr_fp;
+ __u32 kr_data;
};
static cfs_list_t kkuc_groups[KUC_GRP_MAX+1] = {};
/* Protect message sending against remove and adds */
-static CFS_DECLARE_RWSEM(kg_sem);
+static DECLARE_RWSEM(kg_sem);
/** Add a receiver to a broadcast group
* @param filp pipe to write into
* @param uid identidier for this receiver
* @param group group number
*/
-int libcfs_kkuc_group_add(cfs_file_t *filp, int uid, int group)
+int libcfs_kkuc_group_add(cfs_file_t *filp, int uid, int group, __u32 data)
{
struct kkuc_reg *reg;
reg->kr_fp = filp;
reg->kr_uid = uid;
+ reg->kr_data = data;
- cfs_down_write(&kg_sem);
+ down_write(&kg_sem);
if (kkuc_groups[group].next == NULL)
CFS_INIT_LIST_HEAD(&kkuc_groups[group]);
cfs_list_add(®->kr_chain, &kkuc_groups[group]);
- cfs_up_write(&kg_sem);
+ up_write(&kg_sem);
CDEBUG(D_KUC, "Added uid=%d fp=%p to group %d\n", uid, filp, group);
libcfs_kkuc_group_put(group, &lh);
}
- cfs_down_write(&kg_sem);
+ down_write(&kg_sem);
cfs_list_for_each_entry_safe(reg, next, &kkuc_groups[group], kr_chain) {
if ((uid == 0) || (uid == reg->kr_uid)) {
cfs_list_del(®->kr_chain);
CDEBUG(D_KUC, "Removed uid=%d fp=%p from group %d\n",
reg->kr_uid, reg->kr_fp, group);
- cfs_put_file(reg->kr_fp);
+ if (reg->kr_fp != NULL)
+ cfs_put_file(reg->kr_fp);
cfs_free(reg);
}
}
- cfs_up_write(&kg_sem);
+ up_write(&kg_sem);
RETURN(0);
}
int rc = 0;
ENTRY;
- cfs_down_read(&kg_sem);
+ down_read(&kg_sem);
cfs_list_for_each_entry(reg, &kkuc_groups[group], kr_chain) {
+ if (reg->kr_fp != NULL) {
rc = libcfs_kkuc_msg_put(reg->kr_fp, payload);
+ if (rc == -EPIPE) {
+ cfs_put_file(reg->kr_fp);
+ reg->kr_fp = NULL;
+ }
+ }
}
- cfs_up_read(&kg_sem);
+ up_read(&kg_sem);
RETURN(rc);
}
CFS_EXPORT_SYMBOL(libcfs_kkuc_group_put);
+/**
+ * Calls a callback function for each link of the given kuc group.
+ * @param group the group to call the function on.
+ * @param cb_func the function to be called.
+ * @param cb_arg iextra argument to be passed to the callback function.
+ */
+int libcfs_kkuc_group_foreach(int group, libcfs_kkuc_cb_t cb_func,
+ void *cb_arg)
+{
+ struct kkuc_reg *reg;
+ int rc = 0;
+ ENTRY;
+
+ if (group > KUC_GRP_MAX) {
+ CDEBUG(D_WARNING, "Kernelcomm: bad group %d\n", group);
+ RETURN(-EINVAL);
+ }
+
+ /* no link for this group */
+ if (kkuc_groups[group].next == NULL)
+ RETURN(0);
+
+ down_read(&kg_sem);
+ cfs_list_for_each_entry(reg, &kkuc_groups[group], kr_chain) {
+ if (reg->kr_fp != NULL) {
+ rc = cb_func(reg->kr_data, cb_arg);
+ }
+ }
+ up_read(&kg_sem);
+
+ RETURN(rc);
+}
+CFS_EXPORT_SYMBOL(libcfs_kkuc_group_foreach);
+
#endif /* LUSTRE_UTILS */