ChangeSet 1.1339, 2005/03/21 20:07:51+00:00, akw27@xxxxxxxxxxxxxxxxxxxxxx
manual merge of James's stuff.
Makefile | 4
blockstore.c | 513 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++--
blockstore.h | 75 ++++++++
3 files changed, 575 insertions(+), 17 deletions(-)
diff -Nru a/tools/blktap/Makefile b/tools/blktap/Makefile
--- a/tools/blktap/Makefile 2005-03-22 05:03:18 -05:00
+++ b/tools/blktap/Makefile 2005-03-22 05:03:18 -05:00
@@ -152,6 +152,10 @@
vdi_validate: $(LIB) vdi_validate.c $(VDI_SRCS)
$(CC) $(CFLAGS) -g3 -o vdi_validate vdi_validate.c $(VDI_SRCS)
+blockstored: blockstored.c
+ $(CC) $(CFLAGS) -g3 -o blockstored blockstored.c
+bstest: bstest.c blockstore.c
+ $(CC) $(CFLAGS) -g3 -o bstest bstest.c blockstore.c
.PHONY: TAGS clean install mk-symlinks rpm
TAGS:
diff -Nru a/tools/blktap/blockstore.c b/tools/blktap/blockstore.c
--- a/tools/blktap/blockstore.c 2005-03-22 05:03:18 -05:00
+++ b/tools/blktap/blockstore.c 2005-03-22 05:03:18 -05:00
@@ -14,11 +14,409 @@
#include <sys/types.h>
#include <sys/stat.h>
#include "blockstore.h"
-#include "parallax-threaded.h"
+#define BLOCKSTORE_REMOTE
-/*static int block_fp = -1;*/
-
-static int fd_list[READ_POOL_SIZE+1];
+#ifdef BLOCKSTORE_REMOTE
+
+//#define BSDEBUG
+
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <netinet/in.h>
+#include <netdb.h>
+
+#define ENTER_QUEUE_CR (void)0
+#define LEAVE_QUEUE_CR (void)0
+
+bsserver_t bsservers[MAX_SERVERS];
+bscluster_t bsclusters[MAX_CLUSTERS];
+
+struct sockaddr_in sin_local;
+int bssock = 0;
+
+typedef struct bsq_t_struct {
+ struct bsq_t_struct *prev;
+ struct bsq_t_struct *next;
+ int server;
+ int length;
+ struct msghdr msghdr;
+ struct iovec iov[2];
+ bshdr_t message;
+ void *block;
+} bsq_t;
+
+bsq_t *bs_head = NULL;
+bsq_t *bs_tail = NULL;
+
+int send_message(bsq_t *qe) {
+ int rc;
+
+ qe->msghdr.msg_name = (void *)&(bsservers[qe->server].sin);
+ qe->msghdr.msg_namelen = sizeof(struct sockaddr_in);
+ qe->msghdr.msg_iov = qe->iov;
+ if (qe->block)
+ qe->msghdr.msg_iovlen = 2;
+ else
+ qe->msghdr.msg_iovlen = 1;
+ qe->msghdr.msg_control = NULL;
+ qe->msghdr.msg_controllen = 0;
+ qe->msghdr.msg_flags = 0;
+
+ qe->iov[0].iov_base = (void *)&(qe->message);
+ qe->iov[0].iov_len = MSGBUFSIZE_ID;
+
+ if (qe->block) {
+ qe->iov[1].iov_base = qe->block;
+ qe->iov[1].iov_len = BLOCK_SIZE;
+ }
+
+ rc = sendmsg(bssock, &(qe->msghdr), 0);
+ //rc = sendto(bssock, (void *)&(qe->message), qe->length, 0,
+ // (struct sockaddr *)&(bsservers[qe->server].sin),
+ // sizeof(struct sockaddr_in));
+ if (rc < 0)
+ return rc;
+
+ ENTER_QUEUE_CR;
+
+ LEAVE_QUEUE_CR;
+
+ return rc;
+}
+
+int recv_message(bsq_t *qe) {
+ struct sockaddr_in from;
+ //int flen = sizeof(from);
+ int rc;
+
+ qe->msghdr.msg_name = &from;
+ qe->msghdr.msg_namelen = sizeof(struct sockaddr_in);
+ qe->msghdr.msg_iov = qe->iov;
+ if (qe->block)
+ qe->msghdr.msg_iovlen = 2;
+ else
+ qe->msghdr.msg_iovlen = 1;
+ qe->msghdr.msg_control = NULL;
+ qe->msghdr.msg_controllen = 0;
+ qe->msghdr.msg_flags = 0;
+
+ qe->iov[0].iov_base = (void *)&(qe->message);
+ qe->iov[0].iov_len = MSGBUFSIZE_ID;
+ if (qe->block) {
+ qe->iov[1].iov_base = qe->block;
+ qe->iov[1].iov_len = BLOCK_SIZE;
+ }
+
+ rc = recvmsg(bssock, &(qe->msghdr), 0);
+
+ //return recvfrom(bssock, (void *)&(qe->message), sizeof(bsmsg_t), 0,
+ // (struct sockaddr *)&from, &flen);
+ return rc;
+}
+
+void *readblock_indiv(int server, u64 id) {
+ void *block;
+ bsq_t *qe;
+ int len;
+
+ qe = (bsq_t *)malloc(sizeof(bsq_t));
+ if (!qe) {
+ perror("readblock qe malloc");
+ return NULL;
+ }
+ qe->block = malloc(BLOCK_SIZE);
+ if (!qe->block) {
+ perror("readblock qe malloc");
+ free((void *)qe);
+ return NULL;
+ }
+
+ qe->server = server;
+
+ qe->message.operation = BSOP_READBLOCK;
+ qe->message.flags = 0;
+ qe->message.id = id;
+ qe->length = MSGBUFSIZE_ID;
+
+ if (send_message(qe) < 0) {
+ perror("readblock sendto");
+ goto err;
+ }
+
+ len = recv_message(qe);
+ if (len < 0) {
+ perror("readblock recv");
+ goto err;
+ }
+ if ((qe->message.flags & BSOP_FLAG_ERROR)) {
+ fprintf(stderr, "readblock server error\n");
+ goto err;
+ }
+ if (len < MSGBUFSIZE_BLOCK) {
+ fprintf(stderr, "readblock recv short (%u)\n", len);
+ goto err;
+ }
+ if ((block = malloc(BLOCK_SIZE)) == NULL) {
+ perror("readblock malloc");
+ goto err;
+ }
+ //memcpy(block, qe->message.block, BLOCK_SIZE);
+ block = qe->block;
+
+ free((void *)qe);
+ return block;
+
+ err:
+ free(qe->block);
+ free((void *)qe);
+ return NULL;
+}
+
+/**
+ * readblock: read a block from disk
+ * @id: block id to read
+ *
+ * @return: pointer to block, NULL on error
+ */
+void *readblock(u64 id) {
+ int map = (int)BSID_MAP(id);
+ u64 xid;
+ static int i = CLUSTER_MAX_REPLICAS - 1;
+ void *block = NULL;
+
+ /* special case for the "superblock" just use the first block on the
+ * first replica. (extend to blocks < 6 for vdi bug)
+ */
+ if (id < 6) {
+ block = readblock_indiv(bsclusters[map].servers[0], id);
+ goto out;
+ }
+
+ i++;
+ if (i >= CLUSTER_MAX_REPLICAS)
+ i = 0;
+ switch (i) {
+ case 0:
+ xid = BSID_REPLICA0(id);
+ break;
+ case 1:
+ xid = BSID_REPLICA1(id);
+ break;
+ case 2:
+ xid = BSID_REPLICA2(id);
+ break;
+ }
+
+ block = readblock_indiv(bsclusters[map].servers[i], xid);
+
+ out:
+#ifdef BSDEBUG
+ if (block)
+ fprintf(stderr, "READ: %016llx %02x%02x %02x%02x %02x%02x %02x%02x\n",
+ id,
+ (unsigned int)((unsigned char *)block)[0],
+ (unsigned int)((unsigned char *)block)[1],
+ (unsigned int)((unsigned char *)block)[2],
+ (unsigned int)((unsigned char *)block)[3],
+ (unsigned int)((unsigned char *)block)[4],
+ (unsigned int)((unsigned char *)block)[5],
+ (unsigned int)((unsigned char *)block)[6],
+ (unsigned int)((unsigned char *)block)[7]);
+ else
+ fprintf(stderr, "READ: %016llx NULL\n", id);
+#endif
+ return block;
+}
+
+int writeblock_indiv(int server, u64 id, void *block) {
+ bsq_t *qe;
+ int len;
+
+ qe = (bsq_t *)malloc(sizeof(bsq_t));
+ if (!qe) {
+ perror("writeblock qe malloc");
+ goto err;
+ }
+ qe->server = server;
+
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