Adding upstream version 1.0.12.upstream/1.0.12upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 594 insertions, 0 deletions

diff --git a/lib/clplumbing/ocf_ipc.c b/lib/clplumbing/ocf_ipc.c
new file mode 100644
index 0000000..c243934
--- /dev/null
+++ b/lib/clplumbing/ocf_ipc.c
@@ -0,0 +1,594 @@
+/*
+ *
+ * ocf_ipc.c: IPC abstraction implementation.
+ *
+ *
+ * Copyright (c) 2002 Xiaoxiang Liu <xiliu@ncsa.uiuc.edu>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+#include <lha_internal.h>
+#include <clplumbing/ipc.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/poll.h>
+#include <clplumbing/cl_log.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <ctype.h>
+#include <pwd.h>
+#include <grp.h>
+
+static int num_pool_allocated = 0;
+static int num_pool_freed = 0;
+
+#ifdef IPC_TIME_DEBUG
+struct ha_msg;
+void cl_log_message (int log_level, const struct ha_msg *m);
+int  timediff(longclock_t t1, longclock_t t2);
+void   ha_msg_del(struct ha_msg* msg);
+void	ipc_time_debug(IPC_Channel* ch, IPC_Message* ipcmsg, int whichpos);
+#endif
+
+struct IPC_WAIT_CONNECTION * socket_wait_conn_new(GHashTable* ch_attrs);
+struct IPC_CHANNEL * socket_client_channel_new(GHashTable* ch_attrs);
+
+int (*ipc_pollfunc_ptr)(struct pollfd*, unsigned int, int)
+=	(int (*)(struct pollfd*, unsigned int, int)) poll;
+
+/* Set the IPC poll function to the given function */
+void
+ipc_set_pollfunc(int (*pf)(struct pollfd*, unsigned int, int))
+{
+	ipc_pollfunc_ptr = pf;
+}
+
+struct IPC_WAIT_CONNECTION *
+ipc_wait_conn_constructor(const char * ch_type, GHashTable* ch_attrs)
+{
+  if (strcmp(ch_type, "domain_socket") == 0
+  ||	strcmp(ch_type, IPC_UDS_CRED) == 0
+  ||	strcmp(ch_type, IPC_ANYTYPE) == 0
+  ||	strcmp(ch_type, IPC_DOMAIN_SOCKET) == 0) {
+    return socket_wait_conn_new(ch_attrs);
+  }
+  return NULL;
+}
+
+struct IPC_CHANNEL *
+ipc_channel_constructor(const char * ch_type, GHashTable* ch_attrs)
+{
+  if	(strcmp(ch_type, "domain_socket") == 0
+  ||	strcmp(ch_type, IPC_UDS_CRED) == 0
+  ||	strcmp(ch_type, IPC_ANYTYPE) == 0
+  ||	strcmp(ch_type, IPC_DOMAIN_SOCKET) == 0) {
+
+	return socket_client_channel_new(ch_attrs);
+  }
+  return NULL;
+}
+
+static int
+gnametonum(const char * gname, int gnlen)
+{
+	char	grpname[64];
+	struct group*	grp;
+
+	if (isdigit((int) gname[0])) {
+		return atoi(gname);
+	}
+	if (gnlen >= (int)sizeof(grpname)) {
+		return -1;
+	}
+	strncpy(grpname, gname, gnlen);
+	grpname[gnlen] = EOS;
+	if ((grp = getgrnam(grpname)) == NULL) {
+		cl_log(LOG_ERR
+		,	"Invalid group name [%s]", grpname);
+		return -1;
+	}
+	return (int)grp->gr_gid;
+}
+
+static int
+unametonum(const char * lname, int llen)
+{
+	char	loginname[64];
+	struct passwd*	pwd;
+
+	if (llen >= (int)sizeof(loginname)) {
+		cl_log(LOG_ERR
+		,	"user id name [%s] is too long", loginname);
+		return -1;
+	}
+	strncpy(loginname, lname, llen);
+	loginname[llen] = EOS;
+
+	if (isdigit((int) loginname[0])) {
+		return atoi(loginname);
+	}
+	if ((pwd = getpwnam(loginname)) == NULL) {
+		cl_log(LOG_ERR
+		,	"Invalid user id name [%s]", loginname);
+		return -1;
+	}
+	return (int)pwd->pw_uid;
+}
+
+static GHashTable*
+make_id_table(const char * list, int listlen, int (*map)(const char *, int))
+{
+	GHashTable*	ret;
+	const char *	id;
+	const char *	lastid = list + listlen;
+	int		idlen;
+	int		idval;
+	static int	one = 1;
+
+	ret = g_hash_table_new(g_direct_hash, g_direct_equal);
+
+	id = list;
+	while (id < lastid && *id != EOS) {
+		idlen = strcspn(id, ",");
+		if (id+idlen >= lastid) {
+			idlen = (lastid - id);
+		}
+		idval = map(id, idlen);
+		if (idval < 0) {
+			g_hash_table_destroy(ret);
+			return NULL;
+		}
+#if 0
+		cl_log(LOG_DEBUG
+		,       "Adding [ug]id %*s [%d] to authorization g_hash_table"
+		,	idlen, id, idval);
+#endif
+		g_hash_table_insert(ret, GUINT_TO_POINTER(idval), &one);
+		id += idlen;
+		if (id < lastid) {
+			id += strspn(id, ",");
+		}
+	}
+	return ret;
+}
+
+struct IPC_AUTH*
+ipc_str_to_auth(const char* uidlist, int uidlen, const char* gidlist, int gidlen)
+{
+	struct IPC_AUTH* auth;
+
+	auth = malloc(sizeof(struct IPC_AUTH));
+	if (auth == NULL) {
+		cl_log(LOG_ERR, "Out of memory for IPC_AUTH");
+		return NULL;
+	}
+
+	memset(auth, 0, sizeof(*auth));
+
+	if (uidlist) {
+		auth->uid = make_id_table(uidlist, uidlen, unametonum);
+		if (auth->uid == NULL) {
+			cl_log(LOG_ERR,
+			       "Bad uid list [%*s]",
+			       uidlen, uidlist);
+			goto errout;
+		}
+	}
+	if (gidlist) {
+		auth->gid = make_id_table(gidlist, gidlen, gnametonum);
+		if (auth->gid == NULL) {
+			cl_log(LOG_ERR ,
+			       "Bad gid list [%*s]",
+			       gidlen, gidlist);
+			goto errout;
+		}
+	}
+	return auth;
+
+ errout:
+	if (auth->uid) {
+		g_hash_table_destroy(auth->uid);
+		auth->uid = NULL;
+	}
+	if (auth->gid) {
+		g_hash_table_destroy(auth->gid);
+		auth->gid = NULL;
+	}
+	free(auth);
+	auth = NULL;
+	return NULL;
+}
+
+struct IPC_AUTH *
+ipc_set_auth(uid_t * a_uid, gid_t * a_gid, int num_uid, int num_gid)
+{
+  struct IPC_AUTH *temp_auth;
+  int i;
+  static int v = 1;
+
+  temp_auth = malloc(sizeof(struct IPC_AUTH));
+  if (temp_auth == NULL) {
+	  cl_log(LOG_ERR, "%s: memory allocation failed",__FUNCTION__);
+	  return NULL;
+  }
+  temp_auth->uid = g_hash_table_new(g_direct_hash, g_direct_equal);
+  temp_auth->gid = g_hash_table_new(g_direct_hash, g_direct_equal);
+
+  if (num_uid > 0) {
+    for (i=0; i<num_uid; i++) {
+      g_hash_table_insert(temp_auth->uid, GINT_TO_POINTER((gint)a_uid[i])
+      ,		&v);
+    }
+  }
+
+  if (num_gid > 0) {
+    for (i=0; i<num_gid; i++) {
+      g_hash_table_insert(temp_auth->gid, GINT_TO_POINTER((gint)a_gid[i])
+      ,		&v);
+    }
+  }
+
+  return temp_auth;
+}
+
+void
+ipc_destroy_auth(struct IPC_AUTH *auth)
+{
+	if (auth != NULL) {
+		if (auth->uid) {
+			g_hash_table_destroy(auth->uid);
+		}
+		if (auth->gid) {
+			g_hash_table_destroy(auth->gid);
+		}
+		free((void *)auth);
+	}
+}
+
+static void
+ipc_bufpool_display(struct ipc_bufpool* pool)
+{
+	if (pool == NULL) {
+		return;
+	}
+	cl_log(LOG_INFO, "pool: refcount=%d, startpos=%p, currpos=%p,"
+	       "consumepos=%p, endpos=%p, size=%d",
+	       pool->refcount, pool->startpos,
+	       pool->currpos, pool->consumepos,
+	       pool->endpos, pool->size);
+}
+
+void
+ipc_bufpool_dump_stats(void)
+{
+	cl_log(LOG_INFO, "num_pool_allocated=%d, num_pool_freed=%d, diff=%d",
+	       num_pool_allocated,
+	       num_pool_freed,
+	       num_pool_allocated - num_pool_freed);
+}
+
+#define POOLHDR_SIZE \
+	(sizeof(struct ipc_bufpool) + 2*sizeof(struct SOCKET_MSG_HEAD))
+
+struct ipc_bufpool*
+ipc_bufpool_new(int size)
+{
+	struct ipc_bufpool* pool;
+	int	totalsize;
+
+	/* there are memories for two struct SOCKET_MSG_HEAD
+	 * one for the big message, the other one for the next
+	 * message. This code prevents allocating
+	 *	<big memory> <4k> <big memory><4k> ...
+	 * from happening when a client sends big messages
+	 * constantly*/
+
+	totalsize = size + POOLHDR_SIZE;
+
+	if (totalsize < POOL_SIZE) {
+		totalsize = POOL_SIZE;
+	}
+
+	if (totalsize > MAXMSG + POOLHDR_SIZE) {
+		cl_log(LOG_INFO, "ipc_bufpool_new: "
+		       "asking for buffer with size %d; "
+		       "corrupted data len???", totalsize);
+		return NULL;
+	}
+
+	pool = (struct ipc_bufpool*)malloc(totalsize+1);
+	if (pool == NULL) {
+		cl_log(LOG_ERR, "%s: memory allocation failed", __FUNCTION__);
+		return NULL;
+	}
+	memset(pool, 0, totalsize);
+	pool->refcount = 1;
+	pool->startpos = pool->currpos = pool->consumepos =
+		((char*)pool) + sizeof(struct ipc_bufpool);
+
+	pool->endpos = ((char*)pool)  + totalsize;
+	pool->size = totalsize;
+
+	num_pool_allocated ++ ;
+
+	return pool;
+}
+
+void
+ipc_bufpool_del(struct ipc_bufpool* pool)
+{
+	if (pool == NULL) {
+		return;
+	}
+
+	if (pool->refcount > 0) {
+		cl_log(LOG_ERR," ipc_bufpool_del:"
+		       " IPC buffer pool reference count > 0");
+		return;
+	}
+
+	memset(pool, 0, pool->size);
+	free(pool);
+	num_pool_freed ++ ;
+}
+
+int
+ipc_bufpool_spaceleft(struct ipc_bufpool* pool)
+{
+	if( pool == NULL) {
+		cl_log(LOG_ERR, "ipc_bufpool_spaceleft:"
+		       " invalid input argument");
+		return 0;
+	}
+	return pool->endpos - pool->currpos;
+}
+
+/* brief free the memory space allocated to msg and destroy msg. */
+
+static void
+ipc_bufpool_msg_done(struct IPC_MESSAGE * msg)
+{
+	struct ipc_bufpool* pool;
+
+	if (msg == NULL) {
+		cl_log(LOG_ERR, "ipc_bufpool_msg_done: invalid input");
+		return;
+	}
+
+	pool = (struct ipc_bufpool*)msg->msg_private;
+
+	ipc_bufpool_unref(pool);
+	free(msg);
+}
+
+static struct IPC_MESSAGE*
+ipc_bufpool_msg_new(void)
+{
+	struct IPC_MESSAGE * temp_msg;
+
+	temp_msg = malloc(sizeof(struct IPC_MESSAGE));
+	if (temp_msg == NULL) {
+		cl_log(LOG_ERR, "ipc_bufpool_msg_new:"
+		       "allocating new msg failed");
+		return NULL;
+	}
+
+	memset(temp_msg, 0, sizeof(struct IPC_MESSAGE));
+
+	return temp_msg;
+}
+
+static void
+ipcmsg_display(IPC_Message* ipcmsg)
+{
+	if (ipcmsg == NULL) {
+		cl_log(LOG_ERR, "ipcmsg is NULL");
+		return;
+	}
+	cl_log(LOG_INFO, "ipcmsg: msg_len=%lu, msg_buf=%p, msg_body=%p,"
+	       "msg_done=%p, msg_private=%p, msg_ch=%p",
+	       (unsigned long)ipcmsg->msg_len,
+	       ipcmsg->msg_buf,
+	       ipcmsg->msg_body,
+	       ipcmsg->msg_done,
+	       ipcmsg->msg_private,
+	       ipcmsg->msg_ch);
+}
+
+/* after a recv call, we have new data
+ * in the pool buf, we need to update our
+ * pool struct to consume it
+ *
+ */
+
+int
+ipc_bufpool_update(struct ipc_bufpool* pool,
+		   struct IPC_CHANNEL * ch,
+		   int msg_len,
+		   IPC_Queue* rqueue)
+{
+	IPC_Message*			ipcmsg;
+	struct SOCKET_MSG_HEAD		localhead;
+	struct SOCKET_MSG_HEAD*		head = &localhead;
+	int				nmsgs = 0 ;
+
+	if (rqueue == NULL) {
+		cl_log(LOG_ERR, "ipc_update_bufpool:"
+		       "invalid input");
+		return 0;
+	}
+
+	pool->currpos += msg_len;
+
+	while(TRUE) {
+		/*not enough data for head*/
+		if ((int)(pool->currpos - pool->consumepos) < (int)ch->msgpad) {
+			break;
+		}
+
+		memcpy(head, pool->consumepos, sizeof(struct SOCKET_MSG_HEAD));
+
+		if (head->magic != HEADMAGIC) {
+			GList* last = g_list_last(rqueue->queue);
+			cl_log(LOG_ERR, "ipc_bufpool_update: "
+			       "magic number in head does not match. "
+			       "Something very bad happened, farside pid =%d",
+			       ch->farside_pid);
+			cl_log(LOG_ERR, "magic=%x, expected value=%x", head->magic, HEADMAGIC);
+			ipc_bufpool_display(pool);
+			cl_log(LOG_INFO, "nmsgs=%d", nmsgs);
+			/*print out the last message in queue*/
+			if (last) {
+				IPC_Message* m = (IPC_Message*)last;
+				ipcmsg_display(m);
+			}
+			return -1;
+		}
+
+		if ( head->msg_len > MAXMSG) {
+			cl_log(LOG_ERR, "ipc_update_bufpool:"
+			       "msg length is corruptted(%d)",
+			       head->msg_len);
+			break;
+		}
+
+		if (pool->consumepos + ch->msgpad + head->msg_len
+		    > pool->currpos) {
+			break;
+		}
+
+		ipcmsg = ipc_bufpool_msg_new();
+		if (ipcmsg == NULL) {
+			cl_log(LOG_ERR, "ipc_update_bufpool:"
+			       "allocating memory for new ipcmsg failed");
+			break;
+
+		}
+		ipcmsg->msg_buf = pool->consumepos;
+		ipcmsg->msg_body = pool->consumepos + ch->msgpad;
+		ipcmsg->msg_len = head->msg_len;
+		ipcmsg->msg_private = pool;
+		ipcmsg->msg_done = ipc_bufpool_msg_done;
+#ifdef IPC_TIME_DEBUG
+		ipc_time_debug(ch,ipcmsg, MSGPOS_RECV);
+#endif
+		rqueue->queue = g_list_append(rqueue->queue, ipcmsg);
+		rqueue->current_qlen ++;
+		nmsgs++;
+
+		pool->consumepos += ch->msgpad + head->msg_len;
+		ipc_bufpool_ref(pool);
+	}
+	return nmsgs;
+}
+
+gboolean
+ipc_bufpool_full(struct ipc_bufpool* pool,
+		 struct IPC_CHANNEL* ch,
+		 int* dataspaceneeded)
+{
+	struct SOCKET_MSG_HEAD  localhead;
+	struct SOCKET_MSG_HEAD* head = &localhead;
+
+	*dataspaceneeded = 0;
+	/* not enough space for head */
+	if ((int)(pool->endpos - pool->consumepos) < (int)ch->msgpad) {
+		return TRUE;
+	}
+
+	/*enough space for head*/
+	if ((int)(pool->currpos - pool->consumepos) >= (int)ch->msgpad) {
+		memcpy(head, pool->consumepos, sizeof(struct SOCKET_MSG_HEAD));
+
+		/* not enough space for data*/
+		if ( pool->consumepos + ch->msgpad + head->msg_len >= pool->endpos) {
+			*dataspaceneeded = head->msg_len;
+			return TRUE;
+		}
+	}
+
+	/* Either we are sure we have enough space
+	 * or we cannot tell because we have not received
+	 * head yet. But we are sure we have enough space
+	 * for head
+	 */
+	return FALSE;
+}
+
+int
+ipc_bufpool_partial_copy(struct ipc_bufpool* dstpool,
+			      struct ipc_bufpool* srcpool)
+{
+	struct SOCKET_MSG_HEAD	localhead;
+	struct SOCKET_MSG_HEAD *head = &localhead;
+	int space_needed;
+	int nbytes;
+
+	if (dstpool == NULL
+	    || srcpool == NULL) {
+		cl_log(LOG_ERR, "ipc_bufpool_partial_ipcmsg_cp:"
+		       "invalid input");
+		return IPC_FAIL;
+	}
+
+	if (srcpool->currpos - srcpool->consumepos >=
+	    (ssize_t)sizeof(struct SOCKET_MSG_HEAD)) {
+
+		memcpy(head, srcpool->consumepos, sizeof(struct SOCKET_MSG_HEAD));
+		space_needed = head->msg_len + sizeof(*head);
+
+		if (space_needed >  ipc_bufpool_spaceleft(dstpool)) {
+			cl_log(LOG_ERR, "ipc_bufpool_partial_ipcmsg_cp:"
+			       " not enough space left in dst pool,spaced needed=%d",
+			       space_needed);
+			return IPC_FAIL;
+		}
+	}
+
+	nbytes = srcpool->currpos - srcpool->consumepos;
+	memcpy(dstpool->consumepos, srcpool->consumepos,nbytes);
+
+	srcpool->currpos = srcpool->consumepos;
+	dstpool->currpos = dstpool->consumepos + nbytes;
+
+	return IPC_OK;
+}
+
+void
+ipc_bufpool_ref(struct ipc_bufpool* pool)
+{
+	if (pool == NULL) {
+		cl_log(LOG_ERR, "ref_pool:"
+		       " invalid input");
+		return;
+	}
+	pool->refcount ++;
+}
+
+void
+ipc_bufpool_unref(struct ipc_bufpool* pool)
+{
+	if (pool == NULL) {
+		cl_log(LOG_ERR, "unref_pool:"
+		       " invalid input");
+		return;
+	}
+	pool->refcount --;
+	if (pool->refcount <= 0) {
+		ipc_bufpool_del(pool);
+	}
+}