rflclose.c

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/* rflclose.c - rflclose */

#include <xinu.h>

/*------------------------------------------------------------------------
 * rflclose  -  Close a remote file device
 *------------------------------------------------------------------------
 */
devcall rflclose (
      struct dentry *devptr     /* Entry in device switch table */
    )
{
    struct  rflcblk *rfptr;     /* Pointer to control block */

    /* Wait for exclusive access */

    wait(Rf_data.rf_mutex);

    /* Verify remote file device is open */

    rfptr = &rfltab[devptr->dvminor];
    if (rfptr->rfstate == RF_FREE) {
        signal(Rf_data.rf_mutex);
        return SYSERR;
    }

    /* Mark device closed */

    rfptr->rfstate = RF_FREE;
    signal(Rf_data.rf_mutex);
    return OK;
}