/*
- * linux/fs/sim_obd/sim_obd.c
+ * linux/fs/ext2_obd/sim_obd.c
*
* These are the only exported functions; they provide the simulated object-
* oriented disk.
extern struct obd_device obd_dev[MAX_OBD_DEVICES];
/* map connection to client */
-struct obd_client *gen_client(int cli_id)
+struct obd_client *gen_client(struct obd_conn *conn)
{
- struct obd_device * obddev;
+ struct obd_device * obddev = conn->oc_dev;
struct list_head * lh, * next;
struct obd_client * cli;
- int a;
- for (a = 0; a < MAX_OBD_DEVICES; a++) {
- obddev = &obd_dev[a];
-
- lh = next = &obddev->obd_gen_clients;
- while ((lh = lh->next) != &obddev->obd_gen_clients) {
- cli = list_entry(lh, struct obd_client, cli_chain);
-
- if (cli->cli_id == cli_id)
- return cli;
- }
+ lh = next = &obddev->obd_gen_clients;
+ while ((lh = lh->next) != &obddev->obd_gen_clients) {
+ cli = list_entry(lh, struct obd_client, cli_chain);
+
+ if (cli->cli_id == conn->oc_id)
+ return cli;
}
return NULL;
/* a connection defines a context in which preallocation can be managed. */
-int gen_connect (struct obd_device *obddev,
- struct obd_conn_info * conninfo)
+int gen_connect (struct obd_conn *conn)
{
struct obd_client * cli;
OBD_ALLOC(cli, struct obd_client *, sizeof(struct obd_client));
if ( !cli ) {
printk("obd_connect (minor %d): no memory!\n",
- obddev->obd_minor);
+ conn->oc_dev->obd_minor);
return -ENOMEM;
}
INIT_LIST_HEAD(&cli->cli_prealloc_inodes);
/* this should probably spinlocked? */
- cli->cli_id = ++obddev->obd_gen_last_id;
+ cli->cli_id = ++conn->oc_dev->obd_gen_last_id;
cli->cli_prealloc_quota = 0;
- cli->cli_obd = obddev;
- list_add(&(cli->cli_chain), obddev->obd_gen_clients.prev);
+ cli->cli_obd = conn->oc_dev;
+ list_add(&(cli->cli_chain), conn->oc_dev->obd_gen_clients.prev);
CDEBUG(D_IOCTL, "connect: new ID %u\n", cli->cli_id);
- conninfo->conn_id = cli->cli_id;
+ conn->oc_id = cli->cli_id;
return 0;
} /* gen_obd_connect */
-int gen_disconnect(unsigned int conn_id)
+int gen_disconnect(struct obd_conn *conn)
{
struct obd_client * cli;
-
ENTRY;
- if (!(cli = gen_client(conn_id))) {
+ if (!(cli = gen_client(conn))) {
CDEBUG(D_IOCTL, "disconnect: attempting to free "
- "nonexistent client %u\n", conn_id);
+ "nonexistent client %u\n", conn->oc_id);
return -EINVAL;
}
+
list_del(&(cli->cli_chain));
OBD_FREE(cli, sizeof(struct obd_client));
- CDEBUG(D_IOCTL, "disconnect: ID %u\n", conn_id);
+ CDEBUG(D_IOCTL, "disconnect: ID %u\n", conn->oc_id);
EXIT;
return 0;
int gen_multi_setup(struct obd_device *obddev, int len, void *data)
{
int i;
- struct obd_device *rdev = obddev->obd_multi_dev[0];
for (i = 0 ; i < obddev->obd_multi_count ; i++ ) {
int rc;
- struct obd_device *child = rdev + i;
- rc = OBP(child, connect)(child, &rdev->obd_multi_conns[i]);
+ struct obd_conn *ch_conn = &obddev->obd_multi_conn[i];
+ rc = OBP(ch_conn->oc_dev, connect)(ch_conn);
if ( rc != 0 ) {
/* XXX disconnect others */
return 0;
}
-int gen_multi_cleanup(struct obd_device * obddev)
-{
- int i;
- struct obd_device **rdev = obddev->obd_multi_dev;
-
- for (i = 0 ; i < obddev->obd_multi_count ; i++ ) {
- int rc;
- struct obd_device *child = *(rdev + i);
- rc = OBP(child, cleanup)(child);
- *(rdev + i) = NULL;
-
- if ( rc != 0 ) {
- /* XXX disconnect others */
- return -EINVAL;
- }
- }
- gen_cleanup(obddev);
- return 0;
-} /* sim_cleanup_obddev */
-
+#if 0
int gen_multi_attach(struct obd_device *obddev, int len, void *data)
{
int i;
}
return 0;
}
-
+#endif
/*
* close all connections to lower devices
* needed for forced unloads of OBD client drivers
*/
-int gen_multi_cleanup_device(struct obd_device *obddev)
+int gen_multi_cleanup(struct obd_device *obddev)
{
int i;
- struct obd_device **rdev;
- rdev = obddev->obd_multi_dev;
for (i = 0 ; i < obddev->obd_multi_count ; i++ ) {
+ struct obd_conn *ch_conn = &obddev->obd_multi_conn[i];
int rc;
- struct obd_device *child = *(rdev + i);
- rc = OBP(child, disconnect)
- (obddev->obd_multi_conns[i].conn_id);
+ rc = OBP(ch_conn->oc_dev, disconnect)(ch_conn);
if ( rc != 0 ) {
- printk("OBD multi cleanup dev: disconnect failure %d\n", child->obd_minor);
+ printk("OBD multi cleanup dev: disconnect failure %d\n", ch_conn->oc_dev->obd_minor);
}
- *(rdev + i) = NULL;
}
return 0;
} /* gen_multi_cleanup_device */
cli = list_entry(tmp, struct obd_client, cli_chain);
CDEBUG(D_IOCTL, "Disconnecting obd_connection %d, at %p\n",
cli->cli_id, cli);
- OBP(obddev, disconnect)(cli->cli_id);
}
-
- return OBP(obddev, cleanup_device)(obddev);
+ return 0;
} /* sim_cleanup_device */
+
+void ___wait_on_page(struct page *page)
+{
+ struct task_struct *tsk = current;
+ DECLARE_WAITQUEUE(wait, tsk);
+
+ add_wait_queue(&page->wait, &wait);
+ do {
+ run_task_queue(&tq_disk);
+ set_task_state(tsk, TASK_UNINTERRUPTIBLE);
+ if (!PageLocked(page))
+ break;
+ schedule();
+ } while (PageLocked(page));
+ tsk->state = TASK_RUNNING;
+ remove_wait_queue(&page->wait, &wait);
+}
+
+void lck_page(struct page *page)
+{
+ while (TryLockPage(page))
+ ___wait_on_page(page);
+}
+
+/* XXX this should return errors correctly, so should migrate!!! */
+int gen_copy_data(struct obd_conn *conn, obdattr *tgt, obdattr *src)
+{
+ struct page *page;
+ unsigned long index = 0;
+ int rc;
+ ENTRY;
+
+ CDEBUG(D_INODE, "src: ino %ld blocks %ld, size %Ld, dst: ino %ld\n",
+ src->i_ino, src->i_blocks, src->i_size, tgt->i_ino);
+ page = alloc_page(GFP_USER);
+ if ( !page ) {
+ EXIT;
+ return -ENOMEM;
+ }
+
+ lck_page(page);
+
+ while (index < ((src->i_size + PAGE_SIZE - 1) >> PAGE_SHIFT)) {
+
+ page->index = index;
+ rc = OBP(conn->oc_dev, brw)(READ, conn, src, page, 0);
+
+ if ( rc != PAGE_SIZE )
+ break;
+
+ rc = OBP(conn->oc_dev,brw)(WRITE, conn, tgt, page, 1);
+ if ( rc != PAGE_SIZE)
+ break;
+
+ CDEBUG(D_INODE, "Copied page %d ...\n", index);
+
+ index ++;
+ }
+ tgt->i_size = src->i_size;
+ tgt->i_blocks = src->i_blocks;
+ UnlockPage(page);
+ __free_page(page);
+
+ EXIT;
+ return 0;
+}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff