#define PORTAL_MINOR 240
struct nal_cmd_handler {
+ int nch_number;
nal_cmd_handler_fn *nch_handler;
void *nch_private;
};
-static struct nal_cmd_handler nal_cmd[NAL_MAX_NR + 1];
+static struct nal_cmd_handler nal_cmd[16];
static DECLARE_MUTEX(nal_cmd_sem);
#ifdef PORTAL_DEBUG
PORTAL_FREE(data, len);
}
+struct nal_cmd_handler *
+libcfs_find_nal_cmd_handler(int nal)
+{
+ int i;
+
+ for (i = 0; i < sizeof(nal_cmd)/sizeof(nal_cmd[0]); i++)
+ if (nal_cmd[i].nch_handler != NULL &&
+ nal_cmd[i].nch_number == nal)
+ return (&nal_cmd[i]);
+
+ return (NULL);
+}
+
int
libcfs_nal_cmd_register(int nal, nal_cmd_handler_fn *handler, void *private)
{
- int rc = 0;
+ struct nal_cmd_handler *cmd;
+ int i;
+ int rc;
CDEBUG(D_IOCTL, "Register NAL %d, handler: %p\n", nal, handler);
- if (nal > 0 && nal <= NAL_MAX_NR) {
- down(&nal_cmd_sem);
- if (nal_cmd[nal].nch_handler != NULL)
- rc = -EBUSY;
- else {
- nal_cmd[nal].nch_handler = handler;
- nal_cmd[nal].nch_private = private;
+ down(&nal_cmd_sem);
+
+ if (libcfs_find_nal_cmd_handler(nal) != NULL) {
+ up (&nal_cmd_sem);
+ return (-EBUSY);
+ }
+
+ cmd = NULL;
+ for (i = 0; i < sizeof(nal_cmd)/sizeof(nal_cmd[0]); i++)
+ if (nal_cmd[i].nch_handler == NULL) {
+ cmd = &nal_cmd[i];
+ break;
}
- up(&nal_cmd_sem);
+
+ if (cmd == NULL) {
+ rc = -EBUSY;
+ } else {
+ rc = 0;
+ cmd->nch_number = nal;
+ cmd->nch_handler = handler;
+ cmd->nch_private = private;
}
+
+ up(&nal_cmd_sem);
+
return rc;
}
EXPORT_SYMBOL(libcfs_nal_cmd_register);
void
libcfs_nal_cmd_unregister(int nal)
{
- CDEBUG(D_IOCTL, "Unregister NAL %d\n", nal);
+ struct nal_cmd_handler *cmd;
- LASSERT(nal > 0 && nal <= NAL_MAX_NR);
- LASSERT(nal_cmd[nal].nch_handler != NULL);
+ CDEBUG(D_IOCTL, "Unregister NAL %d\n", nal);
down(&nal_cmd_sem);
- nal_cmd[nal].nch_handler = NULL;
- nal_cmd[nal].nch_private = NULL;
+ cmd = libcfs_find_nal_cmd_handler(nal);
+ LASSERT (cmd != NULL);
+ cmd->nch_handler = NULL;
+ cmd->nch_private = NULL;
up(&nal_cmd_sem);
}
EXPORT_SYMBOL(libcfs_nal_cmd_unregister);
int
libcfs_nal_cmd(struct portals_cfg *pcfg)
{
+ struct nal_cmd_handler *cmd;
__u32 nal = pcfg->pcfg_nal;
int rc = -EINVAL;
ENTRY;
down(&nal_cmd_sem);
- if (nal > 0 && nal <= NAL_MAX_NR &&
- nal_cmd[nal].nch_handler != NULL) {
+ cmd = libcfs_find_nal_cmd_handler(nal);
+ if (cmd != NULL) {
CDEBUG(D_IOCTL, "calling handler nal: %d, cmd: %d\n", nal,
pcfg->pcfg_command);
- rc = nal_cmd[nal].nch_handler(pcfg, nal_cmd[nal].nch_private);
+ rc = cmd->nch_handler(pcfg, cmd->nch_private);
}
up(&nal_cmd_sem);