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Annotation of xinu/sys/LSI/iblfree.c, revision 1.1

1.1     ! root        1: /* iblfree.c - iblfree */
        !             2: 
        !             3: #include <conf.h>
        !             4: #include <kernel.h>
        !             5: #include <io.h>
        !             6: #include <disk.h>
        !             7: #include <lfile.h>
        !             8: #include <dir.h>
        !             9: 
        !            10: /*------------------------------------------------------------------------
        !            11:  *  iblfree  --  free a list of iblocks given the number of the first
        !            12:  *------------------------------------------------------------------------
        !            13:  */
        !            14: iblfree(diskdev, iblist)
        !            15: int    diskdev;
        !            16: IBADDR iblist;
        !            17: {
        !            18:        IBADDR  ilast;
        !            19:        struct  iblk    iblock;
        !            20:        struct  dir     *dirptr;
        !            21:        int     sem;
        !            22:        DBADDR  dba;
        !            23:        int     j;
        !            24: 
        !            25:        if (iblist == IBNULL)
        !            26:                return(OK);
        !            27:        dirptr = dsdirec(diskdev);
        !            28:        ibget(diskdev, iblist, &iblock);
        !            29:        for (ilast=iblist ; iblock.ib_next!=IBNULL ;) {
        !            30:                for (j=0 ; j<IBLEN ; j++)
        !            31:                        if ( (dba=iblock.ib_dba[j]) != DBNULL)
        !            32:                                lfsdfree(diskdev, dba);
        !            33:                ilast = iblock.ib_next;
        !            34:                ibget(diskdev, ilast, &iblock);
        !            35:        }
        !            36:        for (j=0 ; j<IBLEN ; j++)
        !            37:                if ( (dba=iblock.ib_dba[j]) != DBNULL)
        !            38:                        lfsdfree(diskdev, dba);
        !            39:        sem = ( (struct dsblk *)devtab[diskdev].dvioblk)->dflsem;
        !            40:        wait(sem);
        !            41:        iblock.ib_next = dirptr->d_filst;
        !            42:        dirptr->d_filst = iblist;
        !            43:        ibput(diskdev, ilast, &iblock);
        !            44:        write(diskdev, dskbcpy(dirptr), DIRBLK);
        !            45:        signal(sem);
        !            46:        return(OK);
        !            47: }

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