diff options
author | dd <dd@FreeBSD.org> | 2001-07-25 12:06:36 +0000 |
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committer | dd <dd@FreeBSD.org> | 2001-07-25 12:06:36 +0000 |
commit | 833e06c1f6e6a11fd972de08a697a8b8235e8187 (patch) | |
tree | ac004a1172fa43d10672e7f3f3462c86c2ab96df | |
parent | 728ae8e8e4ad921526bb2e6df67d6c9cc1f165e9 (diff) | |
download | FreeBSD-src-833e06c1f6e6a11fd972de08a697a8b8235e8187.zip FreeBSD-src-833e06c1f6e6a11fd972de08a697a8b8235e8187.tar.gz |
sys/kern/tty_snoop.c is now sys/dev/snp/snp.c.
Repo-copy by: jdp
-rw-r--r-- | sys/conf/files | 2 | ||||
-rw-r--r-- | sys/kern/tty_snoop.c | 610 | ||||
-rw-r--r-- | sys/modules/snp/Makefile | 4 |
3 files changed, 3 insertions, 613 deletions
diff --git a/sys/conf/files b/sys/conf/files index 82ff30a..d596ca5 100644 --- a/sys/conf/files +++ b/sys/conf/files @@ -476,6 +476,7 @@ dev/sn/if_sn.c optional sn dev/sn/if_sn_isa.c optional sn isa dev/sn/if_sn_pccard.c optional sn card dev/sn/if_sn_pccard.c optional sn pccard +dev/snp/snp.c optional snp dev/sound/isa/ad1816.c optional pcm isa dev/sound/isa/emu8000.c optional midi isa dev/sound/isa/es1888.c optional pcm isa @@ -825,7 +826,6 @@ kern/tty_compat.c standard kern/tty_conf.c standard kern/tty_cons.c standard kern/tty_pty.c optional pty -kern/tty_snoop.c optional snp kern/tty_subr.c standard kern/tty_tty.c standard kern/uipc_accf.c optional inet diff --git a/sys/kern/tty_snoop.c b/sys/kern/tty_snoop.c deleted file mode 100644 index d0563c8..0000000 --- a/sys/kern/tty_snoop.c +++ /dev/null @@ -1,610 +0,0 @@ -/* - * Copyright (c) 1995 Ugen J.S.Antsilevich - * - * Redistribution and use in source forms, with and without modification, - * are permitted provided that this entire comment appears intact. - * - * Redistribution in binary form may occur without any restrictions. - * Obviously, it would be nice if you gave credit where credit is due - * but requiring it would be too onerous. - * - * This software is provided ``AS IS'' without any warranties of any kind. - * - * Snoop stuff. - * - * $FreeBSD$ - */ - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/filio.h> -#include <sys/malloc.h> -#include <sys/tty.h> -#include <sys/conf.h> -#include <sys/poll.h> -#include <sys/kernel.h> -#include <sys/queue.h> -#include <sys/snoop.h> -#include <sys/vnode.h> - -static l_close_t snplclose; -static l_write_t snplwrite; -static d_open_t snpopen; -static d_close_t snpclose; -static d_read_t snpread; -static d_write_t snpwrite; -static d_ioctl_t snpioctl; -static d_poll_t snppoll; - -#define CDEV_MAJOR 53 -static struct cdevsw snp_cdevsw = { - /* open */ snpopen, - /* close */ snpclose, - /* read */ snpread, - /* write */ snpwrite, - /* ioctl */ snpioctl, - /* poll */ snppoll, - /* mmap */ nommap, - /* strategy */ nostrategy, - /* name */ "snp", - /* maj */ CDEV_MAJOR, - /* dump */ nodump, - /* psize */ nopsize, - /* flags */ 0, -}; - -static struct linesw snpdisc = { - ttyopen, snplclose, ttread, snplwrite, - l_nullioctl, ttyinput, ttstart, ttymodem -}; - -static MALLOC_DEFINE(M_SNP, "snp", "Snoop device data"); -/* - * The number of the "snoop" line discipline. This gets determined at - * module load time. - */ -static int snooplinedisc; - - -static LIST_HEAD(, snoop) snp_sclist = LIST_HEAD_INITIALIZER(&snp_sclist); - -static struct tty *snpdevtotty __P((dev_t dev)); -static void snp_clone __P((void *arg, char *name, - int namelen, dev_t *dev)); -static int snp_detach __P((struct snoop *snp)); -static int snp_down __P((struct snoop *snp)); -static int snp_in __P((struct snoop *snp, char *buf, int n)); -static int snp_modevent __P((module_t mod, int what, void *arg)); - -static int -snplclose(tp, flag) - struct tty *tp; - int flag; -{ - struct snoop *snp; - int error; - - snp = tp->t_sc; - error = snp_down(snp); - if (error != 0) - return (error); - error = ttylclose(tp, flag); - return (error); -} - -static int -snplwrite(tp, uio, flag) - struct tty *tp; - struct uio *uio; - int flag; -{ - struct iovec iov; - struct uio uio2; - struct snoop *snp; - int error, ilen; - char ibuf[512]; - - snp = tp->t_sc; - while (uio->uio_resid > 0) { - ilen = imin(sizeof(ibuf), uio->uio_resid); - error = uiomove(ibuf, ilen, uio); - if (error != 0) - return (error); - snp_in(snp, ibuf, ilen); - /* Hackish, but probably the least of all evils. */ - iov.iov_base = ibuf; - iov.iov_len = ilen; - uio2.uio_iov = &iov; - uio2.uio_iovcnt = 1; - uio2.uio_offset = 0; - uio2.uio_resid = ilen; - uio2.uio_segflg = UIO_SYSSPACE; - uio2.uio_rw = UIO_WRITE; - uio2.uio_procp = uio->uio_procp; - error = ttwrite(tp, &uio2, flag); - if (error != 0) - return (error); - } - return (0); -} - -static struct tty * -snpdevtotty(dev) - dev_t dev; -{ - struct cdevsw *cdp; - - cdp = devsw(dev); - if (cdp == NULL || (cdp->d_flags & D_TTY) == 0) - return (NULL); - return (dev->si_tty); -} - -#define SNP_INPUT_BUF 5 /* This is even too much, the maximal - * interactive mode write is 3 bytes - * length for function keys... - */ - -static int -snpwrite(dev, uio, flag) - dev_t dev; - struct uio *uio; - int flag; -{ - struct snoop *snp; - struct tty *tp; - int error, i, len; - char c[SNP_INPUT_BUF]; - - snp = dev->si_drv1; - tp = snp->snp_tty; - if (tp == NULL) - return (EIO); - if ((tp->t_sc == snp) && (tp->t_state & TS_SNOOP) && - tp->t_line == snooplinedisc) - goto tty_input; - - printf("Snoop: attempt to write to bad tty.\n"); - return (EIO); - -tty_input: - if (!(tp->t_state & TS_ISOPEN)) - return (EIO); - - while (uio->uio_resid > 0) { - len = imin(uio->uio_resid, SNP_INPUT_BUF); - if ((error = uiomove(c, len, uio)) != 0) - return (error); - for (i=0; i < len; i++) { - if (ttyinput(c[i], tp)) - return (EIO); - } - } - return (0); -} - - -static int -snpread(dev, uio, flag) - dev_t dev; - struct uio *uio; - int flag; -{ - struct snoop *snp; - int error, len, n, nblen, s; - caddr_t from; - char *nbuf; - - snp = dev->si_drv1; - KASSERT(snp->snp_len + snp->snp_base <= snp->snp_blen, - ("snoop buffer error")); - - if (snp->snp_tty == NULL) - return (EIO); - - snp->snp_flags &= ~SNOOP_RWAIT; - - do { - if (snp->snp_len == 0) { - if (flag & IO_NDELAY) - return (EWOULDBLOCK); - snp->snp_flags |= SNOOP_RWAIT; - tsleep((caddr_t)snp, (PZERO + 1) | PCATCH, "snprd", 0); - } - } while (snp->snp_len == 0); - - n = snp->snp_len; - - error = 0; - while (snp->snp_len > 0 && uio->uio_resid > 0 && error == 0) { - len = min((unsigned)uio->uio_resid, snp->snp_len); - from = (caddr_t)(snp->snp_buf + snp->snp_base); - if (len == 0) - break; - - error = uiomove(from, len, uio); - snp->snp_base += len; - snp->snp_len -= len; - } - if ((snp->snp_flags & SNOOP_OFLOW) && (n < snp->snp_len)) { - snp->snp_flags &= ~SNOOP_OFLOW; - } - s = spltty(); - nblen = snp->snp_blen; - if (((nblen / 2) >= SNOOP_MINLEN) && (nblen / 2) >= snp->snp_len) { - while (nblen / 2 >= snp->snp_len && nblen / 2 >= SNOOP_MINLEN) - nblen = nblen / 2; - if ((nbuf = malloc(nblen, M_SNP, M_NOWAIT)) != NULL) { - bcopy(snp->snp_buf + snp->snp_base, nbuf, snp->snp_len); - free(snp->snp_buf, M_SNP); - snp->snp_buf = nbuf; - snp->snp_blen = nblen; - snp->snp_base = 0; - } - } - splx(s); - - return (error); -} - -static int -snp_in(snp, buf, n) - struct snoop *snp; - char *buf; - int n; -{ - int s_free, s_tail; - int s, len, nblen; - caddr_t from, to; - char *nbuf; - - KASSERT(n >= 0, ("negative snoop char count")); - - if (n == 0) - return (0); - - if (snp->snp_flags & SNOOP_DOWN) { - printf("Snoop: more data to down interface.\n"); - return (0); - } - - if (snp->snp_flags & SNOOP_OFLOW) { - printf("Snoop: buffer overflow.\n"); - /* - * On overflow we just repeat the standart close - * procedure...yes , this is waste of space but.. Then next - * read from device will fail if one would recall he is - * snooping and retry... - */ - - return (snp_down(snp)); - } - s_tail = snp->snp_blen - (snp->snp_len + snp->snp_base); - s_free = snp->snp_blen - snp->snp_len; - - - if (n > s_free) { - s = spltty(); - nblen = snp->snp_blen; - while ((n > s_free) && ((nblen * 2) <= SNOOP_MAXLEN)) { - nblen = snp->snp_blen * 2; - s_free = nblen - (snp->snp_len + snp->snp_base); - } - if ((n <= s_free) && (nbuf = malloc(nblen, M_SNP, M_NOWAIT))) { - bcopy(snp->snp_buf + snp->snp_base, nbuf, snp->snp_len); - free(snp->snp_buf, M_SNP); - snp->snp_buf = nbuf; - snp->snp_blen = nblen; - snp->snp_base = 0; - } else { - snp->snp_flags |= SNOOP_OFLOW; - if (snp->snp_flags & SNOOP_RWAIT) { - snp->snp_flags &= ~SNOOP_RWAIT; - wakeup((caddr_t)snp); - } - splx(s); - return (0); - } - splx(s); - } - if (n > s_tail) { - from = (caddr_t)(snp->snp_buf + snp->snp_base); - to = (caddr_t)(snp->snp_buf); - len = snp->snp_len; - bcopy(from, to, len); - snp->snp_base = 0; - } - to = (caddr_t)(snp->snp_buf + snp->snp_base + snp->snp_len); - bcopy(buf, to, n); - snp->snp_len += n; - - if (snp->snp_flags & SNOOP_RWAIT) { - snp->snp_flags &= ~SNOOP_RWAIT; - wakeup((caddr_t)snp); - } - selwakeup(&snp->snp_sel); - snp->snp_sel.si_pid = 0; - - return (n); -} - -static int -snpopen(dev, flag, mode, p) - dev_t dev; - int flag, mode; - struct proc *p; -{ - struct snoop *snp; - int error; - - if ((error = suser(p)) != 0) - return (error); - - if (dev->si_drv1 == NULL) { - if (!(dev->si_flags & SI_NAMED)) - make_dev(&snp_cdevsw, minor(dev), UID_ROOT, GID_WHEEL, - 0600, "snp%d", dev2unit(dev)); - dev->si_drv1 = snp = malloc(sizeof(*snp), M_SNP, - M_WAITOK | M_ZERO); - } else - return (EBUSY); - - /* - * We intentionally do not OR flags with SNOOP_OPEN, but set them so - * all previous settings (especially SNOOP_OFLOW) will be cleared. - */ - snp->snp_flags = SNOOP_OPEN; - - snp->snp_buf = malloc(SNOOP_MINLEN, M_SNP, M_WAITOK); - snp->snp_blen = SNOOP_MINLEN; - snp->snp_base = 0; - snp->snp_len = 0; - - /* - * snp_tty == NULL is for inactive snoop devices. - */ - snp->snp_tty = NULL; - snp->snp_target = NODEV; - - LIST_INSERT_HEAD(&snp_sclist, snp, snp_list); - return (0); -} - - -static int -snp_detach(snp) - struct snoop *snp; -{ - struct tty *tp; - - snp->snp_base = 0; - snp->snp_len = 0; - - /* - * If line disc. changed we do not touch this pointer, SLIP/PPP will - * change it anyway. - */ - tp = snp->snp_tty; - if (tp == NULL) - goto detach_notty; - - if (tp && (tp->t_sc == snp) && (tp->t_state & TS_SNOOP) && - tp->t_line == snooplinedisc) { - tp->t_sc = NULL; - tp->t_state &= ~TS_SNOOP; - tp->t_line = snp->snp_olddisc; - } else - printf("Snoop: bad attached tty data.\n"); - - snp->snp_tty = NULL; - snp->snp_target = NODEV; - -detach_notty: - selwakeup(&snp->snp_sel); - snp->snp_sel.si_pid = 0; - if ((snp->snp_flags & SNOOP_OPEN) == 0) - free(snp, M_SNP); - - return (0); -} - -static int -snpclose(dev, flags, fmt, p) - dev_t dev; - int flags; - int fmt; - struct proc *p; -{ - struct snoop *snp; - - snp = dev->si_drv1; - snp->snp_blen = 0; - LIST_REMOVE(snp, snp_list); - free(snp->snp_buf, M_SNP); - snp->snp_flags &= ~SNOOP_OPEN; - dev->si_drv1 = NULL; - destroy_dev(dev); - - return (snp_detach(snp)); -} - -static int -snp_down(snp) - struct snoop *snp; -{ - - if (snp->snp_blen != SNOOP_MINLEN) { - free(snp->snp_buf, M_SNP); - snp->snp_buf = malloc(SNOOP_MINLEN, M_SNP, M_WAITOK); - snp->snp_blen = SNOOP_MINLEN; - } - snp->snp_flags |= SNOOP_DOWN; - - return (snp_detach(snp)); -} - -static int -snpioctl(dev, cmd, data, flags, p) - dev_t dev; - u_long cmd; - caddr_t data; - int flags; - struct proc *p; -{ - struct snoop *snp; - struct tty *tp, *tpo; - dev_t tdev; - int s; - - snp = dev->si_drv1; - switch (cmd) { - case SNPSTTY: - tdev = udev2dev(*((udev_t *)data), 0); - if (tdev == NODEV) - return (snp_down(snp)); - - tp = snpdevtotty(tdev); - if (!tp) - return (EINVAL); - - s = spltty(); - - if (snp->snp_target == NODEV) { - tpo = snp->snp_tty; - if (tpo) - tpo->t_state &= ~TS_SNOOP; - } - - tp->t_sc = (caddr_t)snp; - tp->t_state |= TS_SNOOP; - snp->snp_olddisc = tp->t_line; - tp->t_line = snooplinedisc; - snp->snp_tty = tp; - snp->snp_target = tdev; - - /* - * Clean overflow and down flags - - * we'll have a chance to get them in the future :))) - */ - snp->snp_flags &= ~SNOOP_OFLOW; - snp->snp_flags &= ~SNOOP_DOWN; - splx(s); - break; - - case SNPGTTY: - /* - * We keep snp_target field specially to make - * SNPGTTY happy, else we can't know what is device - * major/minor for tty. - */ - *((dev_t *)data) = snp->snp_target; - break; - - case FIONBIO: - break; - - case FIOASYNC: - if (*(int *)data) - snp->snp_flags |= SNOOP_ASYNC; - else - snp->snp_flags &= ~SNOOP_ASYNC; - break; - - case FIONREAD: - s = spltty(); - if (snp->snp_tty != NULL) - *(int *)data = snp->snp_len; - else - if (snp->snp_flags & SNOOP_DOWN) { - if (snp->snp_flags & SNOOP_OFLOW) - *(int *)data = SNP_OFLOW; - else - *(int *)data = SNP_TTYCLOSE; - } else { - *(int *)data = SNP_DETACH; - } - splx(s); - break; - - default: - return (ENOTTY); - } - return (0); -} - -static int -snppoll(dev, events, p) - dev_t dev; - int events; - struct proc *p; -{ - struct snoop *snp; - int revents; - - snp = dev->si_drv1; - revents = 0; - /* - * If snoop is down, we don't want to poll() forever so we return 1. - * Caller should see if we down via FIONREAD ioctl(). The last should - * return -1 to indicate down state. - */ - if (events & (POLLIN | POLLRDNORM)) { - if (snp->snp_flags & SNOOP_DOWN || snp->snp_len > 0) - revents |= events & (POLLIN | POLLRDNORM); - else - selrecord(p, &snp->snp_sel); - } - return (revents); -} - -static void -snp_clone(arg, name, namelen, dev) - void *arg; - char *name; - int namelen; - dev_t *dev; -{ - int u; - - if (*dev != NODEV) - return; - if (dev_stdclone(name, NULL, "snp", &u) != 1) - return; - *dev = make_dev(&snp_cdevsw, unit2minor(u), UID_ROOT, GID_WHEEL, 0600, - "snp%d", u); -} - -static int -snp_modevent(mod, type, data) - module_t mod; - int type; - void *data; -{ - static eventhandler_tag eh_tag; - - switch (type) { - case MOD_LOAD: - /* XXX error checking. */ - eh_tag = EVENTHANDLER_REGISTER(dev_clone, snp_clone, 0, 1000); - snooplinedisc = ldisc_register(LDISC_LOAD, &snpdisc); - cdevsw_add(&snp_cdevsw); - break; - case MOD_UNLOAD: - if (!LIST_EMPTY(&snp_sclist)) - return (EBUSY); - EVENTHANDLER_DEREGISTER(dev_clone, eh_tag); - ldisc_deregister(snooplinedisc); - cdevsw_remove(&snp_cdevsw); - break; - default: - break; - } - return (0); -} - -static moduledata_t snp_mod = { - "snp", - snp_modevent, - NULL -}; -DECLARE_MODULE(snp, snp_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE + CDEV_MAJOR); diff --git a/sys/modules/snp/Makefile b/sys/modules/snp/Makefile index 23a7581..6a450b2 100644 --- a/sys/modules/snp/Makefile +++ b/sys/modules/snp/Makefile @@ -1,9 +1,9 @@ # $FreeBSD$ -.PATH: ${.CURDIR}/../../kern +.PATH: ${.CURDIR}/../../dev/snp KMOD= snp -SRCS= tty_snoop.c vnode_if.h +SRCS= snp.c vnode_if.h NOMAN= .include <bsd.kmod.mk> |