#include <sys/param.h>
#include <sys/systm.h>
#include <sys/filedesc.h>
#include <sys/kernel.h>
#include <sys/vnode.h>
#include <sys/proc.h>
#include <sys/file.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/fcntl.h>
#include <sys/malloc.h>
#include <sys/syslog.h>
#include <sys/unistd.h>
#include <sys/resourcevar.h>
#include <sys/mount.h>
struct filelist filehead;
int nfiles;
static int frele_internal(struct file *);
int
getdtablesize(p, uap, retval)
struct proc *p;
void *uap;
register_t *retval;
{
*retval = min((int)p->p_rlimit[RLIMIT_NOFILE].rlim_cur, maxfiles);
return (0);
}
int
ogetdtablesize(p, uap, retval)
struct proc *p;
void *uap;
register_t *retval;
{
*retval = min((int)p->p_rlimit[RLIMIT_NOFILE].rlim_cur, NOFILE);
return (0);
}
static __inline__
void _fdrelse(fdp, fd)
register struct filedesc *fdp;
register int fd;
{
if (fd < fdp->fd_freefile)
fdp->fd_freefile = fd;
#if DIAGNOSTIC
if (fd > fdp->fd_lastfile)
panic("fdrelse: fd_lastfile inconsistent");
#endif
fdp->fd_ofiles[fd] = NULL;
fdp->fd_ofileflags[fd] = 0;
while ((fd = fdp->fd_lastfile) > 0 &&
fdp->fd_ofiles[fd] == NULL &&
!(fdp->fd_ofileflags[fd] & UF_RESERVED))
fdp->fd_lastfile--;
}
struct dup_args {
u_int fd;
};
int
dup(p, uap, retval)
struct proc *p;
struct dup_args *uap;
register_t *retval;
{
register struct filedesc *fdp = p->p_fd;
register int old = uap->fd;
int new, error;
if ((u_int)old >= fdp->fd_nfiles ||
fdp->fd_ofiles[old] == NULL ||
(fdp->fd_ofileflags[old] & UF_RESERVED))
return (EBADF);
if (error = fdalloc(p, 0, &new))
return (error);
return (finishdup(fdp, old, new, retval));
}
struct dup2_args {
u_int from;
u_int to;
};
int
dup2(p, uap, retval)
struct proc *p;
struct dup2_args *uap;
register_t *retval;
{
register struct filedesc *fdp = p->p_fd;
register int old = uap->from, new = uap->to;
int i, error;
if ((u_int)old >= fdp->fd_nfiles ||
fdp->fd_ofiles[old] == NULL ||
(fdp->fd_ofileflags[old] & UF_RESERVED) ||
(u_int)new >= p->p_rlimit[RLIMIT_NOFILE].rlim_cur ||
(u_int)new >= maxfiles)
return (EBADF);
if (old == new) {
*retval = new;
return (0);
}
if ((u_int)new >= fdp->fd_nfiles) {
if (error = fdalloc(p, new, &i))
return (error);
if (new != i) {
_fdrelse(fdp, i);
goto closeit;
}
} else {
struct file **fpp;
char flags;
closeit:
if ((flags = fdp->fd_ofileflags[new]) & UF_RESERVED)
return (EBADF);
fdp->fd_ofileflags[new] = (flags & ~UF_MAPPED) | UF_RESERVED;
if (*(fpp = &fdp->fd_ofiles[new])) {
struct file *fp = *fpp;
*fpp = NULL;
(void) closef(fp, p);
}
}
return (finishdup(fdp, old, new, retval));
}
struct fcntl_args {
int fd;
int cmd;
int arg;
};
int
fcntl(p, uap, retval)
struct proc *p;
register struct fcntl_args *uap;
register_t *retval;
{
int fd = uap->fd;
register struct filedesc *fdp = p->p_fd;
register struct file *fp;
register char *pop;
struct vnode *vp, *devvp;
int i, tmp, error, error2, flg = F_POSIX;
struct flock fl;
fstore_t alloc_struct;
u_int32_t alloc_flags = 0;
off_t offset;
int newmin;
struct radvisory ra_struct;
fbootstraptransfer_t fbt_struct;
struct log2phys l2p_struct;
daddr_t lbn, bn;
int devBlockSize = 0;
if ((u_int)fd >= fdp->fd_nfiles ||
(fp = fdp->fd_ofiles[fd]) == NULL ||
(fdp->fd_ofileflags[fd] & UF_RESERVED))
return (EBADF);
pop = &fdp->fd_ofileflags[fd];
switch (uap->cmd) {
case F_DUPFD:
newmin = (long)uap->arg;
if ((u_int)newmin >= p->p_rlimit[RLIMIT_NOFILE].rlim_cur ||
(u_int)newmin >= maxfiles)
return (EINVAL);
if (error = fdalloc(p, newmin, &i))
return (error);
return (finishdup(fdp, fd, i, retval));
case F_GETFD:
*retval = (*pop & UF_EXCLOSE)? 1 : 0;
return (0);
case F_SETFD:
*pop = (*pop &~ UF_EXCLOSE) |
((long)(uap->arg) & 1)? UF_EXCLOSE : 0;
return (0);
case F_GETFL:
*retval = OFLAGS(fp->f_flag);
return (0);
case F_SETFL:
fp->f_flag &= ~FCNTLFLAGS;
fp->f_flag |= FFLAGS((long)uap->arg) & FCNTLFLAGS;
tmp = fp->f_flag & FNONBLOCK;
error = fo_ioctl(fp, FIONBIO, (caddr_t)&tmp, p);
if (error)
return (error);
tmp = fp->f_flag & FASYNC;
error = fo_ioctl(fp, FIOASYNC, (caddr_t)&tmp, p);
if (!error)
return (0);
fp->f_flag &= ~FNONBLOCK;
tmp = 0;
(void)fo_ioctl(fp, FIONBIO, (caddr_t)&tmp, p);
return (error);
case F_GETOWN:
if (fp->f_type == DTYPE_SOCKET) {
*retval = ((struct socket *)fp->f_data)->so_pgid;
return (0);
}
error = fo_ioctl(fp, (int)TIOCGPGRP, (caddr_t)retval, p);
*retval = -*retval;
return (error);
case F_SETOWN:
if (fp->f_type == DTYPE_SOCKET) {
((struct socket *)fp->f_data)->so_pgid =
(long)uap->arg;
return (0);
}
if ((long)uap->arg <= 0) {
uap->arg = (int)(-(long)(uap->arg));
} else {
struct proc *p1 = pfind((long)uap->arg);
if (p1 == 0)
return (ESRCH);
uap->arg = (int)p1->p_pgrp->pg_id;
}
return (fo_ioctl(fp, (int)TIOCSPGRP, (caddr_t)&uap->arg, p));
case F_SETLKW:
flg |= F_WAIT;
case F_SETLK:
if (fp->f_type != DTYPE_VNODE)
return (EBADF);
vp = (struct vnode *)fp->f_data;
error = copyin((caddr_t)uap->arg, (caddr_t)&fl,
sizeof (fl));
if (error)
return (error);
if (fl.l_whence == SEEK_CUR)
fl.l_start += fp->f_offset;
switch (fl.l_type) {
case F_RDLCK:
if ((fp->f_flag & FREAD) == 0)
return (EBADF);
p->p_flag |= P_ADVLOCK;
return (VOP_ADVLOCK(vp, (caddr_t)p, F_SETLK, &fl, flg));
case F_WRLCK:
if ((fp->f_flag & FWRITE) == 0)
return (EBADF);
p->p_flag |= P_ADVLOCK;
return (VOP_ADVLOCK(vp, (caddr_t)p, F_SETLK, &fl, flg));
case F_UNLCK:
return (VOP_ADVLOCK(vp, (caddr_t)p, F_UNLCK, &fl,
F_POSIX));
default:
return (EINVAL);
}
case F_GETLK:
if (fp->f_type != DTYPE_VNODE)
return (EBADF);
vp = (struct vnode *)fp->f_data;
error = copyin((caddr_t)uap->arg, (caddr_t)&fl,
sizeof (fl));
if (error)
return (error);
if (fl.l_whence == SEEK_CUR)
fl.l_start += fp->f_offset;
if (error = VOP_ADVLOCK(vp, (caddr_t)p, F_GETLK, &fl, F_POSIX))
return (error);
return (copyout((caddr_t)&fl, (caddr_t)uap->arg,
sizeof (fl)));
case F_PREALLOCATE:
if (fp->f_type != DTYPE_VNODE)
return (EBADF);
if ((fp->f_flag & FWRITE) == 0)
return (EBADF);
error = copyin((caddr_t)uap->arg, (caddr_t)&alloc_struct,
sizeof (alloc_struct));
if (error)
return (error);
alloc_struct.fst_bytesalloc = 0;
alloc_flags |= PREALLOCATE;
if (alloc_struct.fst_flags & F_ALLOCATECONTIG)
alloc_flags |= ALLOCATECONTIG;
if (alloc_struct.fst_flags & F_ALLOCATEALL)
alloc_flags |= ALLOCATEALL;
switch (alloc_struct.fst_posmode) {
case F_PEOFPOSMODE:
if (alloc_struct.fst_offset != 0)
return (EINVAL);
alloc_flags |= ALLOCATEFROMPEOF;
break;
case F_VOLPOSMODE:
if (alloc_struct.fst_offset <= 0)
return (EINVAL);
alloc_flags |= ALLOCATEFROMVOL;
break;
default:
return(EINVAL);
}
vp = (struct vnode *)fp->f_data;
error = vn_lock(vp, LK_EXCLUSIVE|LK_RETRY, p);
if (error)
return (error);
error = VOP_ALLOCATE(vp,alloc_struct.fst_length,alloc_flags,
&alloc_struct.fst_bytesalloc, alloc_struct.fst_offset,
fp->f_cred, p);
VOP_UNLOCK(vp, 0, p);
if (error2 = copyout((caddr_t)&alloc_struct,
(caddr_t)uap->arg,
sizeof (alloc_struct))) {
if (error)
return(error);
else
return(error2);
}
return(error);
case F_SETSIZE:
if (fp->f_type != DTYPE_VNODE)
return (EBADF);
error = copyin((caddr_t)uap->arg, (caddr_t)&offset,
sizeof (off_t));
if (error)
return (error);
if (!is_suser())
return (EACCES);
vp = (struct vnode *)fp->f_data;
error = vn_lock(vp, LK_EXCLUSIVE|LK_RETRY, p);
if (error)
return (error);
error = VOP_TRUNCATE(vp,offset,IO_NOZEROFILL,fp->f_cred,p);
VOP_UNLOCK(vp,0,p);
return(error);
case F_RDAHEAD:
if (fp->f_type != DTYPE_VNODE)
return (EBADF);
vp = (struct vnode *)fp->f_data;
simple_lock(&vp->v_interlock);
if (uap->arg)
vp->v_flag &= ~VRAOFF;
else
vp->v_flag |= VRAOFF;
simple_unlock(&vp->v_interlock);
return (0);
case F_NOCACHE:
if (fp->f_type != DTYPE_VNODE)
return (EBADF);
vp = (struct vnode *)fp->f_data;
simple_lock(&vp->v_interlock);
if (uap->arg)
vp->v_flag |= VNOCACHE_DATA;
else
vp->v_flag &= ~VNOCACHE_DATA;
simple_unlock(&vp->v_interlock);
return (0);
case F_RDADVISE:
if (fp->f_type != DTYPE_VNODE)
return (EBADF);
vp = (struct vnode *)fp->f_data;
if (error = copyin((caddr_t)uap->arg,
(caddr_t)&ra_struct, sizeof (ra_struct)))
return(error);
return (VOP_IOCTL(vp, 1, (caddr_t)&ra_struct, 0, fp->f_cred, p));
case F_READBOOTSTRAP:
case F_WRITEBOOTSTRAP:
if (fp->f_type != DTYPE_VNODE)
return (EBADF);
error = copyin((caddr_t)uap->arg, (caddr_t)&fbt_struct,
sizeof (fbt_struct));
if (error)
return (error);
if (uap->cmd == F_WRITEBOOTSTRAP) {
if (!is_suser())
return (EACCES);
}
vp = (struct vnode *)fp->f_data;
if (vp->v_tag != VT_HFS)
error = EINVAL;
else {
error = vn_lock(vp, LK_EXCLUSIVE|LK_RETRY, p);
if (error)
return (error);
error = VOP_IOCTL(vp, (uap->cmd == F_WRITEBOOTSTRAP) ? 3 : 2,
(caddr_t)&fbt_struct, 0, fp->f_cred, p);
VOP_UNLOCK(vp,0,p);
}
return(error);
case F_LOG2PHYS:
if (fp->f_type != DTYPE_VNODE)
return (EBADF);
vp = (struct vnode *)fp->f_data;
error = vn_lock(vp, LK_EXCLUSIVE|LK_RETRY, p);
if (error)
return (error);
if (VOP_OFFTOBLK(vp, fp->f_offset, &lbn))
panic("fcntl LOG2PHYS OFFTOBLK");
if (VOP_BLKTOOFF(vp, lbn, &offset))
panic("fcntl LOG2PHYS BLKTOOFF1");
error = VOP_BMAP(vp, lbn, &devvp, &bn, 0);
VOP_DEVBLOCKSIZE(devvp, &devBlockSize);
VOP_UNLOCK(vp, 0, p);
if (!error) {
l2p_struct.l2p_flags = 0;
l2p_struct.l2p_contigbytes = 0;
l2p_struct.l2p_devoffset = bn * devBlockSize;
l2p_struct.l2p_devoffset += fp->f_offset - offset;
error = copyout((caddr_t)&l2p_struct,
(caddr_t)uap->arg,
sizeof (l2p_struct));
}
return (error);
default:
return (EINVAL);
}
}
int
finishdup(fdp, old, new, retval)
register struct filedesc *fdp;
register int old, new;
register_t *retval;
{
register struct file *fp;
if ((fp = fdp->fd_ofiles[old]) == NULL ||
(fdp->fd_ofileflags[old] & UF_RESERVED)) {
_fdrelse(fdp, new);
return (EBADF);
}
fdp->fd_ofiles[new] = fp;
fdp->fd_ofileflags[new] = fdp->fd_ofileflags[old] &~ UF_EXCLOSE;
(void)fref(fp);
if (new > fdp->fd_lastfile)
fdp->fd_lastfile = new;
*retval = new;
return (0);
}
struct close_args {
int fd;
};
int
close(p, uap, retval)
struct proc *p;
struct close_args *uap;
register_t *retval;
{
int fd = uap->fd;
register struct filedesc *fdp = p->p_fd;
register struct file *fp;
if ((u_int)fd >= fdp->fd_nfiles ||
(fp = fdp->fd_ofiles[fd]) == NULL ||
(fdp->fd_ofileflags[fd] & UF_RESERVED))
return (EBADF);
_fdrelse(fdp, fd);
return (closef(fp, p));
}
struct fstat_args {
int fd;
struct stat *sb;
};
int
fstat(p, uap, retval)
struct proc *p;
register struct fstat_args *uap;
register_t *retval;
{
int fd = uap->fd;
register struct filedesc *fdp = p->p_fd;
register struct file *fp;
struct stat ub;
int error;
if ((u_int)fd >= fdp->fd_nfiles ||
(fp = fdp->fd_ofiles[fd]) == NULL ||
(fdp->fd_ofileflags[fd] & UF_RESERVED))
return (EBADF);
switch (fp->f_type) {
case DTYPE_VNODE:
error = vn_stat((struct vnode *)fp->f_data, &ub, p);
break;
case DTYPE_SOCKET:
error = soo_stat((struct socket *)fp->f_data, &ub);
break;
case DTYPE_PSXSHM:
error = pshm_stat((void *)fp->f_data, &ub);
break;
default:
panic("fstat");
}
if (error == 0)
error = copyout((caddr_t)&ub, (caddr_t)uap->sb,
sizeof (ub));
return (error);
}
#if COMPAT_43
struct ofstat_args {
int fd;
struct ostat *sb;
};
ofstat(p, uap, retval)
struct proc *p;
register struct ofstat_args *uap;
register_t *retval;
{
int fd = uap->fd;
register struct filedesc *fdp = p->p_fd;
register struct file *fp;
struct stat ub;
struct ostat oub;
int error;
if ((u_int)fd >= fdp->fd_nfiles ||
(fp = fdp->fd_ofiles[fd]) == NULL ||
(fdp->fd_ofileflags[fd] & UF_RESERVED))
return (EBADF);
switch (fp->f_type) {
case DTYPE_VNODE:
error = vn_stat((struct vnode *)fp->f_data, &ub, p);
break;
case DTYPE_SOCKET:
error = soo_stat((struct socket *)fp->f_data, &ub);
break;
default:
panic("ofstat");
}
cvtstat(&ub, &oub);
if (error == 0)
error = copyout((caddr_t)&oub, (caddr_t)uap->sb,
sizeof (oub));
return (error);
}
#endif
struct fpathconf_args {
int fd;
int name;
};
fpathconf(p, uap, retval)
struct proc *p;
register struct fpathconf_args *uap;
register_t *retval;
{
int fd = uap->fd;
struct filedesc *fdp = p->p_fd;
struct file *fp;
struct vnode *vp;
if ((u_int)fd >= fdp->fd_nfiles ||
(fp = fdp->fd_ofiles[fd]) == NULL ||
(fdp->fd_ofileflags[fd] & UF_RESERVED))
return (EBADF);
switch (fp->f_type) {
case DTYPE_SOCKET:
if (uap->name != _PC_PIPE_BUF)
return (EINVAL);
*retval = PIPE_BUF;
return (0);
case DTYPE_VNODE:
vp = (struct vnode *)fp->f_data;
return (VOP_PATHCONF(vp, uap->name, retval));
default:
panic("fpathconf");
}
}
int fdexpand;
int
fdalloc(p, want, result)
struct proc *p;
int want;
int *result;
{
register struct filedesc *fdp = p->p_fd;
register int i;
int lim, last, nfiles, oldnfiles;
struct file **newofiles, **ofiles;
char *newofileflags, *ofileflags;
lim = min((int)p->p_rlimit[RLIMIT_NOFILE].rlim_cur, maxfiles);
for (;;) {
last = min(fdp->fd_nfiles, lim);
if ((i = want) < fdp->fd_freefile)
i = fdp->fd_freefile;
ofiles = &fdp->fd_ofiles[i];
ofileflags = &fdp->fd_ofileflags[i];
for (; i < last; i++) {
if (*ofiles == NULL && !(*ofileflags & UF_RESERVED)) {
*ofileflags = UF_RESERVED;
if (i > fdp->fd_lastfile)
fdp->fd_lastfile = i;
if (want <= fdp->fd_freefile)
fdp->fd_freefile = i;
*result = i;
return (0);
}
ofiles++; ofileflags++;
}
if (fdp->fd_nfiles >= lim)
return (EMFILE);
if (fdp->fd_nfiles < NDEXTENT)
nfiles = NDEXTENT;
else
nfiles = 2 * fdp->fd_nfiles;
if (nfiles > lim)
nfiles = lim;
MALLOC_ZONE(newofiles, struct file **,
nfiles * OFILESIZE, M_OFILETABL, M_WAITOK);
if (fdp->fd_nfiles >= nfiles) {
FREE_ZONE(newofiles, nfiles * OFILESIZE, M_OFILETABL);
continue;
}
newofileflags = (char *) &newofiles[nfiles];
oldnfiles = fdp->fd_nfiles;
(void) memcpy(newofiles, fdp->fd_ofiles,
oldnfiles * sizeof *fdp->fd_ofiles);
(void) memset(&newofiles[oldnfiles], 0,
(nfiles - oldnfiles) * sizeof *fdp->fd_ofiles);
(void) memcpy(newofileflags, fdp->fd_ofileflags,
oldnfiles * sizeof *fdp->fd_ofileflags);
(void) memset(&newofileflags[oldnfiles], 0,
(nfiles - oldnfiles) *
sizeof *fdp->fd_ofileflags);
ofiles = fdp->fd_ofiles;
fdp->fd_ofiles = newofiles;
fdp->fd_ofileflags = newofileflags;
fdp->fd_nfiles = nfiles;
FREE_ZONE(ofiles, oldnfiles * OFILESIZE, M_OFILETABL);
fdexpand++;
}
}
int
fdavail(p, n)
struct proc *p;
register int n;
{
register struct filedesc *fdp = p->p_fd;
register struct file **fpp;
register char *flags;
register int i, lim;
lim = min((int)p->p_rlimit[RLIMIT_NOFILE].rlim_cur, maxfiles);
if ((i = lim - fdp->fd_nfiles) > 0 && (n -= i) <= 0)
return (1);
fpp = &fdp->fd_ofiles[fdp->fd_freefile];
flags = &fdp->fd_ofileflags[fdp->fd_freefile];
for (i = fdp->fd_nfiles - fdp->fd_freefile; --i >= 0; fpp++, flags++)
if (*fpp == NULL && !(*flags & UF_RESERVED) && --n <= 0)
return (1);
return (0);
}
void
fdrelse(p, fd)
struct proc *p;
int fd;
{
_fdrelse(p->p_fd, fd);
}
int
fdgetf(p, fd, resultfp)
register struct proc *p;
register int fd;
struct file **resultfp;
{
register struct filedesc *fdp = p->p_fd;
struct file *fp;
if ((u_int)fd >= fdp->fd_nfiles ||
(fp = fdp->fd_ofiles[fd]) == NULL ||
(fdp->fd_ofileflags[fd] & UF_RESERVED))
return (EBADF);
if (resultfp)
*resultfp = fp;
return (0);
}
int
falloc(p, resultfp, resultfd)
register struct proc *p;
struct file **resultfp;
int *resultfd;
{
register struct file *fp, *fq;
int error, i;
if (error = fdalloc(p, 0, &i))
return (error);
if (nfiles >= maxfiles) {
tablefull("file");
return (ENFILE);
}
nfiles++;
MALLOC_ZONE(fp, struct file *, sizeof(struct file), M_FILE, M_WAITOK);
bzero(fp, sizeof(struct file));
if (fq = p->p_fd->fd_ofiles[0]) {
LIST_INSERT_AFTER(fq, fp, f_list);
} else {
LIST_INSERT_HEAD(&filehead, fp, f_list);
}
p->p_fd->fd_ofiles[i] = fp;
fp->f_count = 1;
fp->f_cred = p->p_ucred;
crhold(fp->f_cred);
if (resultfp)
*resultfp = fp;
if (resultfd)
*resultfd = i;
return (0);
}
void
ffree(fp)
register struct file *fp;
{
register struct file *fq;
struct ucred *cred;
LIST_REMOVE(fp, f_list);
cred = fp->f_cred;
if (cred != NOCRED) {
fp->f_cred = NOCRED;
crfree(cred);
}
nfiles--;
memset(fp, 0xff, sizeof *fp);
fp->f_count = (short)0xffff;
FREE_ZONE(fp, sizeof *fp, M_FILE);
}
void
fdexec(p)
struct proc *p;
{
register struct filedesc *fdp = p->p_fd;
register int i = fdp->fd_lastfile;
register struct file **fpp = &fdp->fd_ofiles[i];
register char *flags = &fdp->fd_ofileflags[i];
while (i >= 0) {
if ((*flags & (UF_RESERVED|UF_EXCLOSE)) == UF_EXCLOSE) {
register struct file *fp = *fpp;
*fpp = NULL; *flags = 0;
if (i == fdp->fd_lastfile && i > 0)
fdp->fd_lastfile--;
closef(fp, p);
}
else
*flags &= ~UF_MAPPED;
i--; fpp--; flags--;
}
}
struct filedesc *
fdcopy(p)
struct proc *p;
{
register struct filedesc *newfdp, *fdp = p->p_fd;
register int i;
MALLOC_ZONE(newfdp, struct filedesc *,
sizeof *newfdp, M_FILEDESC, M_WAITOK);
(void) memcpy(newfdp, fdp, sizeof *newfdp);
VREF(newfdp->fd_cdir);
if (newfdp->fd_rdir)
VREF(newfdp->fd_rdir);
newfdp->fd_refcnt = 1;
if (newfdp->fd_lastfile < NDFILE)
i = NDFILE;
else {
i = newfdp->fd_nfiles;
while (i > 2 * NDEXTENT && i > newfdp->fd_lastfile * 2)
i /= 2;
}
MALLOC_ZONE(newfdp->fd_ofiles, struct file **,
i * OFILESIZE, M_OFILETABL, M_WAITOK);
newfdp->fd_ofileflags = (char *) &newfdp->fd_ofiles[i];
newfdp->fd_nfiles = i;
if (fdp->fd_nfiles > 0) {
register struct file **fpp;
register char *flags;
(void) memcpy(newfdp->fd_ofiles, fdp->fd_ofiles,
i * sizeof *fdp->fd_ofiles);
(void) memcpy(newfdp->fd_ofileflags, fdp->fd_ofileflags,
i * sizeof *fdp->fd_ofileflags);
fpp = newfdp->fd_ofiles;
flags = newfdp->fd_ofileflags;
for (i = newfdp->fd_lastfile; i-- >= 0; fpp++, flags++)
if (*fpp != NULL && !(*flags & UF_RESERVED)) {
(void)fref(*fpp);
} else {
*fpp = NULL;
*flags = 0;
}
} else
(void) memset(newfdp->fd_ofiles, 0, i * OFILESIZE);
return (newfdp);
}
void
fdfree(p)
struct proc *p;
{
struct filedesc *fdp;
struct file **fpp;
int i;
struct vnode *tvp;
if ((fdp = p->p_fd) == NULL)
return;
if (--fdp->fd_refcnt > 0)
return;
p->p_fd = NULL;
if (fdp->fd_nfiles > 0) {
fpp = fdp->fd_ofiles;
for (i = fdp->fd_lastfile; i-- >= 0; fpp++)
if (*fpp)
(void) closef(*fpp, p);
FREE_ZONE(fdp->fd_ofiles,
fdp->fd_nfiles * OFILESIZE, M_OFILETABL);
}
tvp = fdp->fd_cdir;
fdp->fd_cdir = NULL;
vrele(tvp);
if (fdp->fd_rdir) {
tvp = fdp->fd_rdir;
fdp->fd_rdir = NULL;
vrele(tvp);
}
FREE_ZONE(fdp, sizeof *fdp, M_FILEDESC);
}
static int
closef_finish(fp, p)
register struct file *fp;
register struct proc *p;
{
struct vnode *vp;
struct flock lf;
int error;
if ((fp->f_flag & FHASLOCK) && fp->f_type == DTYPE_VNODE) {
lf.l_whence = SEEK_SET;
lf.l_start = 0;
lf.l_len = 0;
lf.l_type = F_UNLCK;
vp = (struct vnode *)fp->f_data;
(void) VOP_ADVLOCK(vp, (caddr_t)fp, F_UNLCK, &lf, F_FLOCK);
}
if (fp->f_ops)
error = fo_close(fp, p);
else
error = 0;
ffree(fp);
return (error);
}
int
closef(fp, p)
register struct file *fp;
register struct proc *p;
{
struct vnode *vp;
struct flock lf;
int error;
if (fp == NULL)
return (0);
if (p && (p->p_flag & P_ADVLOCK) && fp->f_type == DTYPE_VNODE) {
lf.l_whence = SEEK_SET;
lf.l_start = 0;
lf.l_len = 0;
lf.l_type = F_UNLCK;
vp = (struct vnode *)fp->f_data;
(void) VOP_ADVLOCK(vp, (caddr_t)p, F_UNLCK, &lf, F_POSIX);
}
if (frele_internal(fp) > 0)
return (0);
return(closef_finish(fp, p));
}
struct flock_args {
int fd;
int how;
};
int
flock(p, uap, retval)
struct proc *p;
register struct flock_args *uap;
register_t *retval;
{
int fd = uap->fd;
int how = uap->how;
register struct filedesc *fdp = p->p_fd;
register struct file *fp;
struct vnode *vp;
struct flock lf;
if ((u_int)fd >= fdp->fd_nfiles ||
(fp = fdp->fd_ofiles[fd]) == NULL ||
(fdp->fd_ofileflags[fd] & UF_RESERVED))
return (EBADF);
if (fp->f_type != DTYPE_VNODE)
return (EOPNOTSUPP);
vp = (struct vnode *)fp->f_data;
lf.l_whence = SEEK_SET;
lf.l_start = 0;
lf.l_len = 0;
if (how & LOCK_UN) {
lf.l_type = F_UNLCK;
fp->f_flag &= ~FHASLOCK;
return (VOP_ADVLOCK(vp, (caddr_t)fp, F_UNLCK, &lf, F_FLOCK));
}
if (how & LOCK_EX)
lf.l_type = F_WRLCK;
else if (how & LOCK_SH)
lf.l_type = F_RDLCK;
else
return (EBADF);
fp->f_flag |= FHASLOCK;
if (how & LOCK_NB)
return (VOP_ADVLOCK(vp, (caddr_t)fp, F_SETLK, &lf, F_FLOCK));
return (VOP_ADVLOCK(vp, (caddr_t)fp, F_SETLK, &lf, F_FLOCK|F_WAIT));
}
int
fdopen(dev, mode, type, p)
dev_t dev;
int mode, type;
struct proc *p;
{
p->p_dupfd = minor(dev);
return (ENODEV);
}
int
dupfdopen(fdp, indx, dfd, mode, error)
register struct filedesc *fdp;
register int indx, dfd;
int mode;
int error;
{
register struct file *wfp;
struct file *fp;
fp = fdp->fd_ofiles[indx];
if ((u_int)dfd >= fdp->fd_nfiles ||
(wfp = fdp->fd_ofiles[dfd]) == NULL || wfp == fp ||
(fdp->fd_ofileflags[dfd] & UF_RESERVED))
return (EBADF);
switch (error) {
case ENODEV:
if (((mode & (FREAD|FWRITE)) | wfp->f_flag) != wfp->f_flag)
return (EACCES);
(void)fref(wfp);
if (indx > fdp->fd_lastfile)
fdp->fd_lastfile = indx;;
fdp->fd_ofiles[indx] = wfp;
fdp->fd_ofileflags[indx] = fdp->fd_ofileflags[dfd];
return (0);
case ENXIO:
if (indx > fdp->fd_lastfile)
fdp->fd_lastfile = indx;;
fdp->fd_ofiles[indx] = fdp->fd_ofiles[dfd];
fdp->fd_ofileflags[indx] = fdp->fd_ofileflags[dfd];
_fdrelse(fdp, dfd);
return (0);
default:
return (error);
}
}
int
fref(struct file *fp)
{
if (fp->f_count == (short)0xffff)
return (-1);
if (++fp->f_count <= 0)
panic("fref: f_count");
return ((int)fp->f_count);
}
static int
frele_internal(struct file *fp)
{
if (fp->f_count == (short)0xffff)
panic("frele: stale");
if (--fp->f_count < 0)
panic("frele: count < 0");
return ((int)fp->f_count);
}
int
frele(struct file *fp)
{
int count;
funnel_t * fnl;
extern int disable_funnel;
fnl = thread_funnel_get();
if (!disable_funnel && (fnl != kernel_flock)) {
panic("frele: kernel funnel not held");
} else if (fnl == THR_FUNNEL_NULL) {
panic("frele: no funnel held");
}
if ((count = frele_internal(fp)) == 0) {
(void)closef_finish(fp, current_proc());
}
return(count);
}
int
fcount(struct file *fp)
{
if (fp->f_count == (short)0xffff)
panic("fcount: stale");
return ((int)fp->f_count);
}