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Annotation of researchv10no/sys/fs/errfs.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * error file system:
        !             3:  * substituted for the original file system in inodes which
        !             4:  * someone still has open but which are unwanted;
        !             5:  * e.g. forcing an unmount of a file system with open files outstanding
        !             6:  * the various operations are all either no-ops
        !             7:  * or return errors
        !             8:  * t_put is explicitly a no-op.
        !             9:  * the idea is to prevent any real I/O,
        !            10:  * but allow the offending inodes to hang around
        !            11:  * until finally put
        !            12:  */
        !            13: #include "sys/param.h"
        !            14: #include "sys/user.h"
        !            15: #include "sys/conf.h"
        !            16: #include "sys/inode.h"
        !            17: 
        !            18: int errnami();
        !            19: struct fstypsw erfs = fsinit(nulldev, nulldev, nodev, nodev,
        !            20:        nodev, nodev, errnami, nodev, nodev, nullopen, nodev);
        !            21: 
        !            22: errnami(p, fp, follow)
        !            23: register struct nx *p;
        !            24: struct flagp *fp;
        !            25: int follow;
        !            26: {
        !            27:        u.u_error = ENODEV;
        !            28:        iput(p->dp);
        !            29:        p->dp = NULL;
        !            30:        return (0);
        !            31: }

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