src/sys/miscfs/kernfs/kernfs_vnops.c - diff

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Diff for /src/sys/miscfs/kernfs/kernfs_vnops.c between version 1.41 and 1.86

version 1.41, 1996/02/09 22:40:24

version 1.86, 2003/06/28 14:22:02

Line 35

* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

* SUCH DAMAGE.

* @(#)kernfs_vnops.c 8.9 (Berkeley) 6/15/94

* @(#)kernfs_vnops.c 8.15 (Berkeley) 5/21/95

* Kernel parameter filesystem (/kern)

#include <sys/cdefs.h>

__KERNEL_RCSID(0, "$NetBSD$");

#include <sys/param.h>

#include <sys/systm.h>

#include <sys/kernel.h>

#include <sys/vmmeter.h>

#include <sys/types.h>

#include <sys/time.h>

#include <sys/proc.h>

#include <sys/vnode.h>

Line 58

Line 60

#include <sys/buf.h>

#include <sys/dirent.h>

#include <sys/msgbuf.h>

#include <miscfs/genfs/genfs.h>

#include <miscfs/kernfs/kernfs.h>

#include <uvm/uvm_extern.h>

#define KSTRING 256 /* Largest I/O available via this filesystem */

#define UIO_MX 32

Line 67

Line 73

#define WRITE_MODE (S_IWUSR|S_IRUSR|S_IRGRP|S_IROTH)

struct kern_target {

const struct kern_target kern_targets[] = {

u_char kt_type;

u_char kt_namlen;

char *kt_name;

void *kt_data;

#define KTT_NULL 1

#define KTT_TIME 5

#define KTT_INT 17

#define KTT_STRING 31

#define KTT_HOSTNAME 47

#define KTT_AVENRUN 53

#define KTT_DEVICE 71

#define KTT_MSGBUF 89

u_char kt_tag;

u_char kt_vtype;

mode_t kt_mode;

} kern_targets[] = {

/* NOTE: The name must be less than UIO_MX-16 chars in length */

#define N(s) sizeof(s)-1, s

/* name data tag type ro/rw */

{ DT_DIR, N("."), 0, KTT_NULL, VDIR, DIR_MODE },

{ DT_DIR, N(".."), 0, KTT_NULL, VDIR, DIR_MODE },

{ DT_REG, N("boottime"), &boottime.tv_sec, KTT_INT, VREG, READ_MODE },

{ DT_REG, N("copyright"), copyright, KTT_STRING, VREG, READ_MODE },

/* XXX cast away const */

{ DT_REG, N("copyright"), (void *)copyright,

KTT_STRING, VREG, READ_MODE },

{ DT_REG, N("hostname"), 0, KTT_HOSTNAME, VREG, WRITE_MODE },

{ DT_REG, N("hz"), &hz, KTT_INT, VREG, READ_MODE },

{ DT_REG, N("loadavg"), 0, KTT_AVENRUN, VREG, READ_MODE },

{ DT_REG, N("msgbuf"), 0, KTT_MSGBUF, VREG, READ_MODE },

{ DT_REG, N("pagesize"), &cnt.v_page_size, KTT_INT, VREG, READ_MODE },

{ DT_REG, N("pagesize"), &uvmexp.pagesize, KTT_INT, VREG, READ_MODE },

{ DT_REG, N("physmem"), &physmem, KTT_INT, VREG, READ_MODE },

#if 0

{ DT_DIR, N("root"), 0, KTT_NULL, VDIR, DIR_MODE },

Line 103 struct kern_target {

Line 95 struct kern_target {

{ DT_BLK, N("rootdev"), &rootdev, KTT_DEVICE, VBLK, READ_MODE },

{ DT_CHR, N("rrootdev"), &rrootdev, KTT_DEVICE, VCHR, READ_MODE },

{ DT_REG, N("time"), 0, KTT_TIME, VREG, READ_MODE },

{ DT_REG, N("version"), version, KTT_STRING, VREG, READ_MODE },

/* XXX cast away const */

{ DT_REG, N("version"), (void *)version,

KTT_STRING, VREG, READ_MODE },

#undef N

};

static int nkern_targets = sizeof(kern_targets) / sizeof(kern_targets[0]);

int kernfs_enotsupp __P((void *));

int kernfs_badop __P((void *));

int kernfs_nullop __P((void *));

int kernfs_lookup __P((void *));

#define kernfs_create kernfs_enotsupp

#define kernfs_create genfs_eopnotsupp

#define kernfs_mknod kernfs_enotsupp

#define kernfs_mknod genfs_eopnotsupp

int kernfs_open __P((void *));

#define kernfs_open genfs_nullop

#define kernfs_close nullop

#define kernfs_close genfs_nullop

int kernfs_access __P((void *));

int kernfs_getattr __P((void *));

int kernfs_setattr __P((void *));

int kernfs_read __P((void *));

int kernfs_write __P((void *));

#define kernfs_ioctl kernfs_enotsupp

#define kernfs_fcntl genfs_fcntl

#define kernfs_select kernfs_enotsupp

#define kernfs_ioctl genfs_enoioctl

#define kernfs_mmap kernfs_enotsupp

#define kernfs_poll genfs_poll

#define kernfs_fsync nullop

#define kernfs_revoke genfs_revoke

#define kernfs_seek nullop

#define kernfs_fsync genfs_nullop

#define kernfs_remove kernfs_enotsupp

#define kernfs_seek genfs_nullop

#define kernfs_remove genfs_eopnotsupp

int kernfs_link __P((void *));

#define kernfs_rename kernfs_enotsupp

#define kernfs_rename genfs_eopnotsupp

#define kernfs_mkdir kernfs_enotsupp

#define kernfs_mkdir genfs_eopnotsupp

#define kernfs_rmdir kernfs_enotsupp

#define kernfs_rmdir genfs_eopnotsupp

int kernfs_symlink __P((void *));

int kernfs_readdir __P((void *));

#define kernfs_readlink kernfs_enotsupp

#define kernfs_readlink genfs_eopnotsupp

int kernfs_abortop __P((void *));

#define kernfs_abortop genfs_abortop

int kernfs_inactive __P((void *));

int kernfs_reclaim __P((void *));

#define kernfs_lock nullop

#define kernfs_lock genfs_lock

#define kernfs_unlock nullop

#define kernfs_unlock genfs_unlock

#define kernfs_bmap kernfs_badop

#define kernfs_bmap genfs_badop

#define kernfs_strategy kernfs_badop

#define kernfs_strategy genfs_badop

int kernfs_print __P((void *));

#define kernfs_islocked nullop

#define kernfs_islocked genfs_islocked

int kernfs_pathconf __P((void *));

#define kernfs_advlock kernfs_enotsupp

#define kernfs_advlock genfs_einval

#define kernfs_blkatoff kernfs_enotsupp

#define kernfs_blkatoff genfs_eopnotsupp

#define kernfs_valloc kernfs_enotsupp

#define kernfs_valloc genfs_eopnotsupp

int kernfs_vfree __P((void *));

#define kernfs_vfree genfs_nullop

#define kernfs_truncate kernfs_enotsupp

#define kernfs_truncate genfs_eopnotsupp

#define kernfs_update kernfs_enotsupp

#define kernfs_update genfs_nullop

#define kernfs_bwrite kernfs_enotsupp

#define kernfs_bwrite genfs_eopnotsupp

#define kernfs_putpages genfs_putpages

int kernfs_xread __P((struct kern_target *, int, char **, int));

static int kernfs_xread __P((const struct kern_target *, int, char **, size_t, size_t *));

int kernfs_xwrite __P((struct kern_target *, char *, int));

static int kernfs_xwrite __P((const struct kern_target *, char *, size_t));

int (**kernfs_vnodeop_p) __P((void *));

struct vnodeopv_entry_desc kernfs_vnodeop_entries[] = {

const struct vnodeopv_entry_desc kernfs_vnodeop_entries[] = {

{ &vop_default_desc, vn_default_error },

{ &vop_lookup_desc, kernfs_lookup }, /* lookup */

{ &vop_create_desc, kernfs_create }, /* create */

{ &vop_mknod_desc, kernfs_mknod }, /* mknod */

{ &vop_open_desc, kernfs_open }, /* open */

{ &vop_close_desc, kernfs_close }, /* close */

{ &vop_access_desc, kernfs_access }, /* access */

{ &vop_getattr_desc, kernfs_getattr }, /* getattr */

{ &vop_setattr_desc, kernfs_setattr }, /* setattr */

{ &vop_read_desc, kernfs_read }, /* read */

{ &vop_write_desc, kernfs_write }, /* write */

{ &vop_ioctl_desc, kernfs_ioctl }, /* ioctl */

{ &vop_fcntl_desc, kernfs_fcntl }, /* fcntl */

{ &vop_select_desc, kernfs_select }, /* select */

{ &vop_ioctl_desc, kernfs_ioctl }, /* ioctl */

{ &vop_mmap_desc, kernfs_mmap }, /* mmap */

{ &vop_poll_desc, kernfs_poll }, /* poll */

{ &vop_fsync_desc, kernfs_fsync }, /* fsync */

{ &vop_revoke_desc, kernfs_revoke }, /* revoke */

{ &vop_seek_desc, kernfs_seek }, /* seek */

{ &vop_fsync_desc, kernfs_fsync }, /* fsync */

{ &vop_remove_desc, kernfs_remove }, /* remove */

{ &vop_seek_desc, kernfs_seek }, /* seek */

{ &vop_link_desc, kernfs_link }, /* link */

{ &vop_remove_desc, kernfs_remove }, /* remove */

{ &vop_rename_desc, kernfs_rename }, /* rename */

{ &vop_link_desc, kernfs_link }, /* link */

{ &vop_mkdir_desc, kernfs_mkdir }, /* mkdir */

{ &vop_rename_desc, kernfs_rename }, /* rename */

{ &vop_rmdir_desc, kernfs_rmdir }, /* rmdir */

{ &vop_mkdir_desc, kernfs_mkdir }, /* mkdir */

{ &vop_symlink_desc, kernfs_symlink }, /* symlink */

{ &vop_rmdir_desc, kernfs_rmdir }, /* rmdir */

{ &vop_readdir_desc, kernfs_readdir }, /* readdir */

{ &vop_symlink_desc, kernfs_symlink }, /* symlink */

{ &vop_readlink_desc, kernfs_readlink },/* readlink */

{ &vop_readdir_desc, kernfs_readdir }, /* readdir */

{ &vop_abortop_desc, kernfs_abortop }, /* abortop */

{ &vop_readlink_desc, kernfs_readlink }, /* readlink */

{ &vop_inactive_desc, kernfs_inactive },/* inactive */

{ &vop_abortop_desc, kernfs_abortop }, /* abortop */

{ &vop_reclaim_desc, kernfs_reclaim }, /* reclaim */

{ &vop_inactive_desc, kernfs_inactive }, /* inactive */

{ &vop_lock_desc, kernfs_lock }, /* lock */

{ &vop_reclaim_desc, kernfs_reclaim }, /* reclaim */

{ &vop_unlock_desc, kernfs_unlock }, /* unlock */

{ &vop_lock_desc, kernfs_lock }, /* lock */

{ &vop_bmap_desc, kernfs_bmap }, /* bmap */

{ &vop_unlock_desc, kernfs_unlock }, /* unlock */

{ &vop_strategy_desc, kernfs_strategy },/* strategy */

{ &vop_bmap_desc, kernfs_bmap }, /* bmap */

{ &vop_print_desc, kernfs_print }, /* print */

{ &vop_strategy_desc, kernfs_strategy }, /* strategy */

{ &vop_islocked_desc, kernfs_islocked },/* islocked */

{ &vop_print_desc, kernfs_print }, /* print */

{ &vop_pathconf_desc, kernfs_pathconf },/* pathconf */

{ &vop_islocked_desc, kernfs_islocked }, /* islocked */

{ &vop_advlock_desc, kernfs_advlock }, /* advlock */

{ &vop_pathconf_desc, kernfs_pathconf }, /* pathconf */

{ &vop_blkatoff_desc, kernfs_blkatoff },/* blkatoff */

{ &vop_advlock_desc, kernfs_advlock }, /* advlock */

{ &vop_valloc_desc, kernfs_valloc }, /* valloc */

{ &vop_blkatoff_desc, kernfs_blkatoff }, /* blkatoff */

{ &vop_vfree_desc, kernfs_vfree }, /* vfree */

{ &vop_valloc_desc, kernfs_valloc }, /* valloc */

{ &vop_truncate_desc, kernfs_truncate },/* truncate */

{ &vop_vfree_desc, kernfs_vfree }, /* vfree */

{ &vop_update_desc, kernfs_update }, /* update */

{ &vop_truncate_desc, kernfs_truncate }, /* truncate */

{ &vop_bwrite_desc, kernfs_bwrite }, /* bwrite */

{ &vop_update_desc, kernfs_update }, /* update */

{ (struct vnodeop_desc*)NULL, (int(*) __P((void *)))NULL }

{ &vop_bwrite_desc, kernfs_bwrite }, /* bwrite */

{ &vop_putpages_desc, kernfs_putpages }, /* putpages */

{ NULL, NULL }

};

struct vnodeopv_desc kernfs_vnodeop_opv_desc =

const struct vnodeopv_desc kernfs_vnodeop_opv_desc =

{ &kernfs_vnodeop_p, kernfs_vnodeop_entries };

int

static int

kernfs_xread(kt, off, bufp, len)

kernfs_xread(kt, off, bufp, len, wrlen)

struct kern_target *kt;

const struct kern_target *kt;

int off;

char **bufp;

int len;

size_t len;

size_t *wrlen;

{

switch (kt->kt_tag) {

Line 216 kernfs_xread(kt, off, bufp, len)

Line 212 kernfs_xread(kt, off, bufp, len)

struct timeval tv;

microtime(&tv);

sprintf(*bufp, "%d %d\n", tv.tv_sec, tv.tv_usec);

sprintf(*bufp, "%ld %ld\n", tv.tv_sec, tv.tv_usec);

break;

}

Line 235 kernfs_xread(kt, off, bufp, len)

Line 231 kernfs_xread(kt, off, bufp, len)

}

case KTT_MSGBUF: {

extern struct msgbuf *msgbufp;

long n;

if (off >= MSG_BSIZE)

* deal with cases where the message buffer has

* become corrupted.

if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) {

msgbufenabled = 0;

return (ENXIO);

}

* Note that reads of /kern/msgbuf won't necessarily yield

* consistent results, if the message buffer is modified

* while the read is in progress. The worst that can happen

* is that incorrect data will be read. There's no way

* that this can crash the system unless the values in the

* message buffer header are corrupted, but that'll cause

* the system to die anyway.

if (off >= msgbufp->msg_bufs) {

*wrlen = 0;

return (0);

}

n = msgbufp->msg_bufx + off;

if (n >= MSG_BSIZE)

if (n >= msgbufp->msg_bufs)

n -= MSG_BSIZE;

n -= msgbufp->msg_bufs;

len = min(MSG_BSIZE - n, MSG_BSIZE - off);

len = min(msgbufp->msg_bufs - n, msgbufp->msg_bufs - off);

*bufp = msgbufp->msg_bufc + n;

return (len);

*wrlen = len;

return (0);

}

case KTT_HOSTNAME: {

Line 255 kernfs_xread(kt, off, bufp, len)

Line 271 kernfs_xread(kt, off, bufp, len)

if (xlen >= (len-2))

return (EINVAL);

bcopy(cp, *bufp, xlen);

memcpy(*bufp, cp, xlen);

(*bufp)[xlen] = '\n';

(*bufp)[xlen+1] = '\0';

break;

Line 263 kernfs_xread(kt, off, bufp, len)

Line 279 kernfs_xread(kt, off, bufp, len)

case KTT_AVENRUN:

averunnable.fscale = FSCALE;

sprintf(*bufp, "%ld %ld %ld %ld\n",

sprintf(*bufp, "%d %d %d %ld\n",

averunnable.ldavg[0], averunnable.ldavg[1],

averunnable.ldavg[2], averunnable.fscale);

break;

default:

*wrlen = 0;

return (0);

}

len = strlen(*bufp);

if (len <= off)

return (0);

*wrlen = 0;

*bufp += off;

else {

return (len - off);

*bufp += off;

*wrlen = len - off;

}

return (0);

}

int

static int

kernfs_xwrite(kt, buf, len)

struct kern_target *kt;

const struct kern_target *kt;

char *buf;

int len;

size_t len;

{

switch (kt->kt_tag) {

case KTT_HOSTNAME:

if (buf[len-1] == '\n')

--len;

bcopy(buf, hostname, len);

memcpy(hostname, buf, len);

hostname[len] = '\0';

hostnamelen = len;

hostnamelen = (size_t) len;

return (0);

default:

Line 317 kernfs_lookup(v)

Line 337 kernfs_lookup(v)

struct componentname *cnp = ap->a_cnp;

struct vnode **vpp = ap->a_vpp;

struct vnode *dvp = ap->a_dvp;

char *pname = cnp->cn_nameptr;

const char *pname = cnp->cn_nameptr;

struct kern_target *kt;

const struct kern_target *kt;

struct vnode *fvp;

int error, i;

int error, i, wantpunlock;

#ifdef KERNFS_DIAGNOSTIC

printf("kernfs_lookup(%x)\n", ap);

printf("kernfs_lookup(%p)\n", ap);

printf("kernfs_lookup(dp = %x, vpp = %x, cnp = %x)\n", dvp, vpp, ap->a_cnp);

printf("kernfs_lookup(dp = %p, vpp = %p, cnp = %p)\n", dvp, vpp, ap->a_cnp);

printf("kernfs_lookup(%s)\n", pname);

#endif

*vpp = NULLVP;

cnp->cn_flags &= ~PDIRUNLOCK;

if (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)

return (EROFS);

Line 336 kernfs_lookup(v)

Line 357 kernfs_lookup(v)

if (cnp->cn_namelen == 1 && *pname == '.') {

*vpp = dvp;

VREF(dvp);

/*VOP_LOCK(dvp);*/

return (0);

}

* This code only supports a flat directory, so we don't

* need to worry about ..

#if 0

if (cnp->cn_namelen == 4 && bcmp(pname, "root", 4) == 0) {

if (cnp->cn_namelen == 4 && memcmp(pname, "root", 4) == 0) {

*vpp = rootdir;

VREF(rootdir);

VOP_LOCK(rootdir);

vn_lock(rootdir, LK_SHARED | LK_RETRY);

return (0);

}

#endif

wantpunlock = (~cnp->cn_flags & (LOCKPARENT | ISLASTCN));

for (kt = kern_targets, i = 0; i < nkern_targets; kt++, i++) {

if (cnp->cn_namelen == kt->kt_namlen &&

bcmp(kt->kt_name, pname, cnp->cn_namelen) == 0)

memcmp(kt->kt_name, pname, cnp->cn_namelen) == 0)

goto found;

}

Line 365 found:

Line 392 found:

if (kt->kt_tag == KTT_DEVICE) {

dev_t *dp = kt->kt_data;

loop:

if (*dp == NODEV || !vfinddev(*dp, kt->kt_vtype, &fvp))

if (*dp == NODEV || !vfinddev(*dp, kt->kt_vtype, &fvp)) {

return (ENOENT);

}

*vpp = fvp;

if (vget(fvp, 1))

if (vget(fvp, LK_EXCLUSIVE, cnp->cn_lwp))

goto loop;

if (wantpunlock) {

VOP_UNLOCK(dvp, 0);

cnp->cn_flags |= PDIRUNLOCK;

}

return (0);

}

Line 377 found:

Line 409 found:

printf("kernfs_lookup: allocate new vnode\n");

#endif

error = getnewvnode(VT_KERNFS, dvp->v_mount, kernfs_vnodeop_p, &fvp);

if (error)

if (error) {

return (error);

}

MALLOC(fvp->v_data, void *, sizeof(struct kernfs_node), M_TEMP,

M_WAITOK);

VTOKERN(fvp)->kf_kt = kt;

fvp->v_type = kt->kt_vtype;

vn_lock(fvp, LK_EXCLUSIVE | LK_RETRY);

*vpp = fvp;

#ifdef KERNFS_DIAGNOSTIC

printf("kernfs_lookup: newvp = %x\n", fvp);

printf("kernfs_lookup: newvp = %p\n", fvp);

#endif

return (0);

if (wantpunlock) {

}

VOP_UNLOCK(dvp, 0);

cnp->cn_flags |= PDIRUNLOCK;

/*ARGSUSED*/

}

int

kernfs_open(v)

void *v;

{

/* Only need to check access permissions. */

return (0);

}

Line 412 kernfs_access(v)

Line 441 kernfs_access(v)

struct proc *a_p;

} */ *ap = v;

struct vnode *vp = ap->a_vp;

mode_t fmode =

mode_t mode;

(vp->v_flag & VROOT) ? DIR_MODE : VTOKERN(vp)->kf_kt->kt_mode;

if (vp->v_flag & VROOT) {

mode = DIR_MODE;

} else {

const struct kern_target *kt = VTOKERN(vp)->kf_kt;

mode = kt->kt_mode;

}

return (vaccess(fmode, (uid_t)0, (gid_t)0, ap->a_mode, ap->a_cred));

return (vaccess(vp->v_type, mode, (uid_t)0, (gid_t)0, ap->a_mode,

ap->a_cred));

}

int

Line 430 kernfs_getattr(v)

Line 466 kernfs_getattr(v)

} */ *ap = v;

struct vnode *vp = ap->a_vp;

struct vattr *vap = ap->a_vap;

struct timeval tv;

int error = 0;

char strbuf[KSTRING], *buf;

bzero((caddr_t) vap, sizeof(*vap));

memset((caddr_t) vap, 0, sizeof(*vap));

vattr_null(vap);

vap->va_uid = 0;

vap->va_gid = 0;

vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];

vap->va_size = 0;

vap->va_blocksize = DEV_BSIZE;

microtime(&tv);

TIMEVAL_TO_TIMESPEC(&tv, &vap->va_atime);

* Make all times be current TOD. Avoid microtime(9), it's slow.

vap->va_mtime = vap->va_atime;

* We don't guard the read from time(9) with splclock(9) since we

vap->va_ctime = vap->va_ctime;

* don't actually need to be THAT sure the access is atomic.

TIMEVAL_TO_TIMESPEC(&time, &vap->va_ctime);

vap->va_atime = vap->va_mtime = vap->va_ctime;

vap->va_gen = 0;

vap->va_flags = 0;

vap->va_rdev = 0;

Line 460 kernfs_getattr(v)

Line 498 kernfs_getattr(v)

vap->va_fileid = 2;

vap->va_size = DEV_BSIZE;

} else {

struct kern_target *kt = VTOKERN(vp)->kf_kt;

const struct kern_target *kt = VTOKERN(vp)->kf_kt;

int nbytes, total;

size_t nread, total;

#ifdef KERNFS_DIAGNOSTIC

printf("kernfs_getattr: stat target %s\n", kt->kt_name);

#endif

vap->va_type = kt->kt_vtype;

vap->va_mode = kt->kt_mode;

vap->va_nlink = 1;

vap->va_fileid = 3 + (kt - kern_targets);

vap->va_fileid = 1 + (kt - kern_targets);

total = 0;

while (buf = strbuf,

do {

nbytes = kernfs_xread(kt, total, &buf, sizeof(strbuf)))

buf = strbuf;

total += nbytes;

error = kernfs_xread(kt, total, &buf,

sizeof(strbuf), &nread);

total += nread;

} while (error == 0 && nread != 0);

vap->va_size = total;

}

Line 508 kernfs_read(v)

Line 549 kernfs_read(v)

} */ *ap = v;

struct vnode *vp = ap->a_vp;

struct uio *uio = ap->a_uio;

struct kern_target *kt;

const struct kern_target *kt;

char strbuf[KSTRING], *buf;

int off, len;

off_t off;

size_t len;

int error;

if (vp->v_type == VDIR)

Line 523 kernfs_read(v)

Line 565 kernfs_read(v)

#endif

off = uio->uio_offset;

#if 0

buf = strbuf;

while (buf = strbuf,

if ((error = kernfs_xread(kt, off, &buf, sizeof(strbuf), &len)) == 0)

#else

error = uiomove(buf, len, uio);

if (buf = strbuf,

return (error);

#endif

len = kernfs_xread(kt, off, &buf, sizeof(strbuf))) {

if ((error = uiomove(buf, len, uio)) != 0)

return (error);

off += len;

}

return (0);

}

int

Line 548 kernfs_write(v)

Line 583 kernfs_write(v)

} */ *ap = v;

struct vnode *vp = ap->a_vp;

struct uio *uio = ap->a_uio;

struct kern_target *kt;

const struct kern_target *kt;

int error, xlen;

char strbuf[KSTRING];

Line 581 kernfs_readdir(v)

Line 616 kernfs_readdir(v)

struct uio *a_uio;

struct ucred *a_cred;

int *a_eofflag;

u_long *a_cookies;

off_t **a_cookies;

int a_ncookies;

int a_*ncookies;

} */ *ap = v;

struct uio *uio = ap->a_uio;

struct dirent d;

struct kern_target *kt;

const struct kern_target *kt;

int i;

off_t i;

int error;

u_long *cookies = ap->a_cookies;

off_t *cookies = NULL;

int ncookies = ap->a_ncookies;

int ncookies = 0, nc = 0;

if (ap->a_vp->v_type != VDIR)

return (ENOTDIR);

Line 602 kernfs_readdir(v)

Line 637 kernfs_readdir(v)

error = 0;

i = uio->uio_offset;

bzero((caddr_t)&d, UIO_MX);

if (i >= nkern_targets)

return 0;

memset((caddr_t)&d, 0, UIO_MX);

d.d_reclen = UIO_MX;

if (ap->a_ncookies) {

nc = uio->uio_resid / UIO_MX;

nc = min(nc, (nkern_targets - i));

cookies = malloc(nc * sizeof(off_t), M_TEMP, M_WAITOK);

*ap->a_cookies = cookies;

}

for (kt = &kern_targets[i];

uio->uio_resid >= UIO_MX && i < nkern_targets; kt++, i++) {

#ifdef KERNFS_DIAGNOSTIC

printf("kernfs_readdir: i = %d\n", i);

printf("kernfs_readdir: i = %d\n", (int)i);

#endif

if (kt->kt_tag == KTT_DEVICE) {

Line 621 kernfs_readdir(v)

Line 667 kernfs_readdir(v)

d.d_fileno = i + 3;

d.d_namlen = kt->kt_namlen;

bcopy(kt->kt_name, d.d_name, kt->kt_namlen + 1);

memcpy(d.d_name, kt->kt_name, kt->kt_namlen + 1);

d.d_type = kt->kt_type;

if ((error = uiomove((caddr_t)&d, UIO_MX, uio)) != 0)

break;

if (ncookies-- > 0)

if (cookies) {

*cookies++ = i + 1;

ncookies++;

}

if (ap->a_ncookies) {

if (error) {

free(*ap->a_cookies, M_TEMP);

*ap->a_ncookies = 0;

*ap->a_cookies = NULL;

} else

*ap->a_ncookies = ncookies;

}

uio->uio_offset = i;

Line 640 kernfs_inactive(v)

Line 697 kernfs_inactive(v)

{

struct vop_inactive_args /* {

struct vnode *a_vp;

struct proc *a_p;

} */ *ap = v;

struct vnode *vp = ap->a_vp;

#ifdef KERNFS_DIAGNOSTIC

printf("kernfs_inactive(%x)\n", vp);

printf("kernfs_inactive(%p)\n", vp);

#endif

* Clear out the v_type field to avoid

* nasty things happening in vgone().

VOP_UNLOCK(vp, 0);

vp->v_type = VNON;

return (0);

}

Line 664 kernfs_reclaim(v)

Line 723 kernfs_reclaim(v)

struct vnode *vp = ap->a_vp;

#ifdef KERNFS_DIAGNOSTIC

printf("kernfs_reclaim(%x)\n", vp);

printf("kernfs_reclaim(%p)\n", vp);

#endif

if (vp->v_data) {

FREE(vp->v_data, M_TEMP);

Line 705 kernfs_pathconf(v)

Line 764 kernfs_pathconf(v)

case _PC_VDISABLE:

*ap->a_retval = _POSIX_VDISABLE;

return (0);

case _PC_SYNC_IO:

*ap->a_retval = 1;

return (0);

default:

return (EINVAL);

}

Line 724 kernfs_print(v)

Line 786 kernfs_print(v)

return (0);

}

/*ARGSUSED*/

int

kernfs_vfree(v)

void *v;

{

return (0);

}

int

kernfs_link(v)

void *v;

Line 764 kernfs_symlink(v)

Line 817 kernfs_symlink(v)

vput(ap->a_dvp);

return (EROFS);

}

int

kernfs_abortop(v)

void *v;

{

struct vop_abortop_args /* {

struct vnode *a_dvp;

struct componentname *a_cnp;

} */ *ap = v;

if ((ap->a_cnp->cn_flags & (HASBUF | SAVESTART)) == HASBUF)

FREE(ap->a_cnp->cn_pnbuf, M_NAMEI);

return (0);

}

* /dev/fd vnode unsupported operation

/*ARGSUSED*/

int

kernfs_enotsupp(v)

void *v;

{

return (EOPNOTSUPP);

}

* /dev/fd "should never get here" operation

/*ARGSUSED*/

int

kernfs_badop(v)

void *v;

{

panic("kernfs: bad op");

return 0;

}

* kernfs vnode null operation

/*ARGSUSED*/

int

kernfs_nullop(v)

void *v;

{

return (0);

}

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