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Annotation of xinu/sys/LSI/lfsdfree.c, revision 1.1.1.1

1.1       root        1: /* lfsdfree.c - lfsdfree */
                      2: 
                      3: #include <conf.h>
                      4: #include <kernel.h>
                      5: #include <disk.h>
                      6: #include <lfile.h>
                      7: #include <dir.h>
                      8: 
                      9: /*------------------------------------------------------------------------
                     10:  *  lfsdfree  --  free a data block given its address
                     11:  *------------------------------------------------------------------------
                     12:  */
                     13: lfsdfree(diskdev, dba)
                     14: int    diskdev;
                     15: DBADDR dba;
                     16: {
                     17:        struct  dir     *dirptr;
                     18:        int     dirsem;
                     19:        struct  freeblk *buf;
                     20: 
                     21:        dirptr = dsdirec(diskdev);
                     22:        dirsem = devtab[diskdev].dvioblk->dflsem;
                     23:        buf = (struct freeblk *)getbuf(dskdbp);
                     24:        wait(dirsem);
                     25:        buf->fbnext = dirptr->d_fblst;
                     26:        dirptr->d_fblst = dba;
                     27:        write(diskdev, buf, dba);
                     28:        write(diskdev, dskbcpy(dirptr), DIRBLK);
                     29:        signal(dirsem);
                     30:        return(OK);
                     31: }

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