33#include <sys/kernel.h>
36#include <sys/devctl.h>
39#include <sys/module.h>
40#include <sys/malloc.h>
48#include <sys/taskqueue.h>
49#include <machine/stdarg.h>
51#include <fs/devfs/devfs_int.h>
59 void (*cb)(
void *),
void *arg);
62 int unit,
struct ucred *cr, uid_t uid, gid_t gid,
int mode,
const char *fmt,
67static SLIST_HEAD(free_cdevsw, cdevsw) cdevsw_gt_post_list =
68 SLIST_HEAD_INITIALIZER(cdevsw_gt_post_list);
86 struct cdev_priv_list cdp_free;
87 struct free_cdevsw csw_free;
88 struct cdev_priv *cdp;
91 dev_lock_assert_locked();
97 TAILQ_INIT(&cdp_free);
99 csw_free = cdevsw_gt_post_list;
100 SLIST_INIT(&cdevsw_gt_post_list);
104 while ((cdp = TAILQ_FIRST(&cdp_free)) != NULL) {
105 TAILQ_REMOVE(&cdp_free, cdp, cdp_list);
106 devfs_free(&cdp->cdp_c);
108 while ((csw = SLIST_FIRST(&csw_free)) != NULL) {
109 SLIST_REMOVE_HEAD(&csw_free, d_postfree_list);
117 struct cdev_priv *cdp;
119 dev_lock_assert_locked();
120 cdp = cdev2priv(cdev);
121 KASSERT((cdp->cdp_flags & CDP_UNREF_DTR) == 0,
122 (
"destroy_dev() was not called after delist_dev(%p)", cdev));
130 dev_lock_assert_locked();
131 SLIST_INSERT_HEAD(&cdevsw_gt_post_list, csw, d_postfree_list);
145 dev_lock_assert_unlocked();
155 dev_lock_assert_locked();
164 dev_lock_assert_unlocked();
167 KASSERT(dev->si_refcount >= 0,
168 (
"dev_rel(%s) gave negative count",
devtoname(dev)));
169 if (dev->si_devsw == NULL && dev->si_refcount == 0) {
170 LIST_REMOVE(dev, si_list);
182 struct cdev_priv *cdp;
184 dev_lock_assert_unlocked();
185 if ((dev->si_flags & SI_ETERNAL) != 0) {
187 return (dev->si_devsw);
189 cdp = cdev2priv(dev);
190 mtx_lock(&cdp->cdp_threadlock);
193 if ((cdp->cdp_flags & CDP_SCHED_DTR) == 0)
194 atomic_add_long(&dev->si_threadcount, 1);
198 mtx_unlock(&cdp->cdp_threadlock);
208 struct cdev_priv *cdp;
211 dev_lock_assert_unlocked();
212 if ((vp->v_vflag & VV_ETERNALDEV) != 0) {
216 KASSERT((dev->si_flags & SI_ETERNAL) != 0,
217 (
"Not eternal cdev"));
220 KASSERT(csw != NULL, (
"Eternal cdev is destroyed"));
232 cdp = cdev2priv(dev);
233 mtx_lock(&cdp->cdp_threadlock);
234 if ((cdp->cdp_flags & CDP_SCHED_DTR) == 0) {
237 atomic_add_long(&dev->si_threadcount, 1);
239 mtx_unlock(&cdp->cdp_threadlock);
252 dev_lock_assert_unlocked();
255 KASSERT(dev->si_threadcount > 0,
256 (
"%s threadcount is wrong", dev->si_name));
257 atomic_subtract_rel_long(&dev->si_threadcount, 1);
288#define dead_open (d_open_t *)enxio
289#define dead_close (d_close_t *)enxio
290#define dead_read (d_read_t *)enxio
291#define dead_write (d_write_t *)enxio
292#define dead_ioctl (d_ioctl_t *)enxio
293#define dead_poll (d_poll_t *)enodev
294#define dead_mmap (d_mmap_t *)enodev
303#define dead_dump (dumper_t *)enxio
304#define dead_kqfilter (d_kqfilter_t *)enxio
305#define dead_mmap_single (d_mmap_single_t *)enodev
308 .d_version = D_VERSION,
325#define null_open (d_open_t *)nullop
326#define null_close (d_close_t *)nullop
327#define no_read (d_read_t *)enodev
328#define no_write (d_write_t *)enodev
329#define no_ioctl (d_ioctl_t *)enodev
330#define no_mmap (d_mmap_t *)enodev
331#define no_kqfilter (d_kqfilter_t *)enodev
332#define no_mmap_single (d_mmap_single_t *)enodev
342no_poll(
struct cdev *dev __unused,
int events,
struct thread *td __unused)
348#define no_dump (dumper_t *)enodev
351giant_open(
struct cdev *dev,
int oflags,
int devtype,
struct thread *td)
360 retval = dsw->d_gianttrick->d_open(dev, oflags, devtype, td);
367giant_fdopen(
struct cdev *dev,
int oflags,
struct thread *td,
struct file *fp)
376 retval = dsw->d_gianttrick->d_fdopen(dev, oflags, td, fp);
383giant_close(
struct cdev *dev,
int fflag,
int devtype,
struct thread *td)
392 retval = dsw->d_gianttrick->d_close(dev, fflag, devtype, td);
412 dsw->d_gianttrick->d_strategy(bp);
427 retval = dsw->d_gianttrick->d_ioctl(dev, cmd,
data, fflag, td);
443 retval = dsw->d_gianttrick->d_read(dev, uio, ioflag);
459 retval = dsw->d_gianttrick->d_write(dev, uio, ioflag);
475 retval = dsw->d_gianttrick->d_poll(dev, events, td);
491 retval = dsw->d_gianttrick->d_kqfilter(dev, kn);
498giant_mmap(
struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr,
int nprot,
499 vm_memattr_t *memattr)
508 retval = dsw->d_gianttrick->d_mmap(dev, offset, paddr, nprot,
517 vm_object_t *
object,
int nprot)
526 retval = dsw->d_gianttrick->d_mmap_single(dev, offset, size,
object,
536 static const char prefix[] =
"cdev=";
542 mflags = (
flags & MAKEDEV_NOWAIT) ? M_NOWAIT : M_WAITOK;
543 namelen = strlen(dev->si_name);
544 data =
malloc(namelen +
sizeof(prefix), M_TEMP, mflags);
547 memcpy(
data, prefix,
sizeof(prefix) - 1);
548 memcpy(
data +
sizeof(prefix) - 1, dev->si_name, namelen + 1);
564 notify(dev,
"DESTROY", MAKEDEV_WAITOK);
568newdev(
struct make_dev_args *args,
struct cdev *si)
573 dev_lock_assert_locked();
574 csw = args->mda_devsw;
576 if (csw->d_flags & D_NEEDMINOR) {
578 LIST_FOREACH(si2, &csw->d_devs, si_list) {
579 if (dev2unit(si2) == args->mda_unit) {
594 KASSERT(si2 == NULL || (si2->si_flags & SI_NAMED) == 0,
595 (
"make_dev() by driver %s on pre-existing device (min=%x, name=%s)",
596 args->mda_devsw->d_name, dev2unit(si2),
devtoname(si2)));
598 si->si_drv0 = args->mda_unit;
599 si->si_drv1 = args->mda_si_drv1;
600 si->si_drv2 = args->mda_si_drv2;
604 LIST_INSERT_HEAD(&csw->d_devs, si, si_list);
606 KASSERT(si->si_devsw == csw,
607 (
"%s: inconsistent devsw between clone_create() and make_dev()",
618 if (devsw->d_gianttrick != NULL) {
619 gt = devsw->d_gianttrick;
620 memcpy(devsw, gt,
sizeof *devsw);
622 devsw->d_gianttrick = NULL;
624 devsw->d_flags &= ~D_INIT;
632 dev_lock_assert_locked();
633 if (devsw->d_flags & D_INIT)
635 if (devsw->d_flags & D_NEEDGIANT) {
637 dsw2 =
malloc(
sizeof *dsw2, M_DEVT,
638 (
flags & MAKEDEV_NOWAIT) ? M_NOWAIT : M_WAITOK);
640 if (dsw2 == NULL && !(devsw->d_flags & D_INIT))
644 if (devsw->d_flags & D_INIT) {
650 if (devsw->d_version != D_VERSION_04) {
652 "WARNING: Device driver \"%s\" has wrong version %s\n",
653 devsw->d_name == NULL ?
"???" : devsw->d_name,
654 "and is disabled. Recompile KLD module.");
668 if ((devsw->d_flags & D_NEEDGIANT) != 0) {
669 if ((devsw->d_flags & D_GIANTOK) == 0) {
671 "WARNING: Device \"%s\" is Giant locked and may be "
672 "deleted before FreeBSD 14.0.\n",
673 devsw->d_name == NULL ?
"???" : devsw->d_name);
675 if (devsw->d_gianttrick == NULL) {
676 memcpy(dsw2, devsw,
sizeof *dsw2);
677 devsw->d_gianttrick = dsw2;
682#define FIXUP(member, noop, giant) \
684 if (devsw->member == NULL) { \
685 devsw->member = noop; \
686 } else if (devsw->d_flags & D_NEEDGIANT) \
687 devsw->member = giant; \
703 if (devsw->d_dump == NULL) devsw->d_dump =
no_dump;
705 LIST_INIT(&devsw->d_devs);
707 devsw->d_flags |= D_INIT;
718 char *from, *q, *s, *to;
720 dev_lock_assert_locked();
722 len =
vsnrprintf(dev->si_name,
sizeof(dev->si_name), 32, fmt, ap);
723 if (len >
sizeof(dev->si_name) - 1)
724 return (ENAMETOOLONG);
727 for (from = dev->si_name; *from ==
'/'; from++)
730 for (to = dev->si_name; *from !=
'\0'; from++, to++) {
736 if (isspace(*from) || *from ==
'"')
739 while (from[0] ==
'/' && from[1] ==
'/')
742 if (from[0] ==
'/' && from[1] ==
'\0')
748 if (dev->si_name[0] ==
'\0')
752 for (s = dev->si_name;;) {
753 for (q = s; *q !=
'/' && *q !=
'\0'; q++)
755 if (q - s == 1 && s[0] ==
'.')
757 if (q - s == 2 && s[0] ==
'.' && s[1] ==
'.')
764 if (devfs_dev_exists(dev->si_name) != 0)
780 const char *fmt, va_list ap)
782 struct cdev *dev, *dev_new;
783 struct make_dev_args args;
786 bzero(&args,
sizeof(args));
787 if (
sizeof(args) < args1->mda_size)
789 bcopy(args1, &args, args1->mda_size);
790 KASSERT((args.mda_flags & MAKEDEV_WAITOK) == 0 ||
791 (args.mda_flags & MAKEDEV_NOWAIT) == 0,
792 (
"make_dev_sv: both WAITOK and NOWAIT specified"));
793 dev_new = devfs_alloc(args.mda_flags);
803 dev =
newdev(&args, dev_new);
804 if ((dev->si_flags & SI_NAMED) == 0) {
807 if ((args.mda_flags & MAKEDEV_CHECKNAME) == 0) {
809 "make_dev_sv: bad si_name (error=%d, si_name=%s)",
812 if (dev == dev_new) {
813 LIST_REMOVE(dev, si_list);
821 if ((args.mda_flags & MAKEDEV_REF) != 0)
823 if ((args.mda_flags & MAKEDEV_ETERNAL) != 0)
824 dev->si_flags |= SI_ETERNAL;
825 KASSERT(!(dev->si_flags & SI_NAMED),
826 (
"make_dev() by driver %s on pre-existing device (min=%x, name=%s)",
827 args.mda_devsw->d_name, dev2unit(dev),
devtoname(dev)));
828 dev->si_flags |= SI_NAMED;
829 if (args.mda_cr != NULL)
830 dev->si_cred =
crhold(args.mda_cr);
831 dev->si_uid = args.mda_uid;
832 dev->si_gid = args.mda_gid;
833 dev->si_mode = args.mda_mode;
847 const char *fmt, ...)
860 struct ucred *cr, uid_t uid, gid_t gid,
int mode,
const char *fmt,
863 struct make_dev_args args;
865 make_dev_args_init(&args);
866 args.mda_flags =
flags;
867 args.mda_devsw = devsw;
871 args.mda_mode =
mode;
872 args.mda_unit = unit;
877make_dev(
struct cdevsw *devsw,
int unit, uid_t uid, gid_t gid,
int mode,
878 const char *fmt, ...)
888 KASSERT(
res == 0 && dev != NULL,
889 (
"make_dev: failed make_dev_credv (error=%d)",
res));
895 gid_t gid,
int mode,
const char *fmt, ...)
905 KASSERT(
res == 0 && dev != NULL,
906 (
"make_dev_cred: failed make_dev_credv (error=%d)",
res));
912 uid_t uid, gid_t gid,
int mode,
const char *fmt, ...)
923 KASSERT(((
flags & MAKEDEV_NOWAIT) != 0 &&
res == ENOMEM) ||
924 ((
flags & MAKEDEV_CHECKNAME) != 0 &&
res != ENOMEM) ||
res == 0,
925 (
"make_dev_credf: failed make_dev_credv (error=%d)",
res));
926 return (
res == 0 ? dev : NULL);
931 struct ucred *cr, uid_t uid, gid_t gid,
int mode,
const char *fmt, ...)
941 KASSERT(((
flags & MAKEDEV_NOWAIT) != 0 &&
res == ENOMEM) ||
942 ((
flags & MAKEDEV_CHECKNAME) != 0 &&
res != ENOMEM) ||
res == 0,
943 (
"make_dev_p: failed make_dev_credv (error=%d)",
res));
951 cdev->si_parent = pdev;
952 cdev->si_flags |= SI_CHILD;
953 LIST_INSERT_HEAD(&pdev->si_children, cdev, si_siblings);
967 const char *fmt, va_list ap)
972 KASSERT(pdev != NULL, (
"make_dev_alias_v: pdev is NULL"));
973 KASSERT((
flags & MAKEDEV_WAITOK) == 0 || (
flags & MAKEDEV_NOWAIT) == 0,
974 (
"make_dev_alias_v: both WAITOK and NOWAIT specified"));
975 KASSERT((
flags & ~(MAKEDEV_WAITOK | MAKEDEV_NOWAIT |
976 MAKEDEV_CHECKNAME)) == 0,
977 (
"make_dev_alias_v: invalid flags specified (flags=%02x)",
flags));
979 dev = devfs_alloc(
flags);
983 dev->si_flags |= SI_ALIAS;
986 if ((
flags & MAKEDEV_CHECKNAME) == 0) {
987 panic(
"make_dev_alias_v: bad si_name "
988 "(error=%d, si_name=%s)", error, dev->si_name);
994 dev->si_flags |= SI_NAMED;
1017 KASSERT(
res == 0 && dev != NULL,
1018 (
"make_dev_alias: failed make_dev_alias_v (error=%d)",
res));
1024 const char *fmt, ...)
1037 struct cdev *old_alias,
const char *physpath)
1041 int max_parentpath_len;
1043 int devfspathbuf_len;
1049 physpath_len = strlen(physpath);
1051 if (physpath_len == 0)
1054 if (strncmp(
"id1,", physpath, 4) == 0) {
1057 if (physpath_len == 0)
1061 max_parentpath_len = SPECNAMELEN - physpath_len -
1073*/1 + parentpath_len + 1;
1074 devfspath =
malloc(devfspathbuf_len, M_DEVBUF, mflags);
1075 if (devfspath == NULL) {
1080 sprintf(devfspath,
"%s/%s", physpath, pdev->si_name);
1081 if (old_alias != NULL && strcmp(old_alias->si_name, devfspath) == 0) {
1090 if (old_alias != NULL)
1092 if (devfspath != NULL)
1093 free(devfspath, M_DEVBUF);
1101 struct cdev_privdata *p;
1102 struct cdev_priv *cdp;
1104 dev_lock_assert_locked();
1105 KASSERT(dev->si_flags & SI_NAMED,
1106 (
"WARNING: Driver mistake: destroy_dev on %d\n", dev2unit(dev)));
1107 KASSERT((dev->si_flags & SI_ETERNAL) == 0,
1108 (
"WARNING: Driver mistake: destroy_dev on eternal %d\n",
1111 cdp = cdev2priv(dev);
1112 if ((cdp->cdp_flags & CDP_UNREF_DTR) == 0) {
1125 dev->si_flags &= ~SI_NAMED;
1128 if (dev->si_flags & SI_CHILD) {
1129 LIST_REMOVE(dev, si_siblings);
1130 dev->si_flags &= ~SI_CHILD;
1134 while (!LIST_EMPTY(&dev->si_children))
1138 if (dev->si_flags & SI_CLONELIST) {
1139 LIST_REMOVE(dev, si_clone);
1140 dev->si_flags &= ~SI_CLONELIST;
1143 mtx_lock(&cdp->cdp_threadlock);
1144 csw = dev->si_devsw;
1145 dev->si_devsw = NULL;
1146 while (csw != NULL && csw->d_purge != NULL && dev->si_threadcount) {
1148 mtx_unlock(&cdp->cdp_threadlock);
1149 msleep(csw, &
devmtx, PRIBIO,
"devprg",
hz/10);
1150 mtx_lock(&cdp->cdp_threadlock);
1151 if (dev->si_threadcount)
1152 printf(
"Still %lu threads in %s\n",
1155 while (dev->si_threadcount != 0) {
1157 mtx_unlock(&cdp->cdp_threadlock);
1158 msleep(&csw, &
devmtx, PRIBIO,
"devdrn",
hz / 10);
1159 mtx_lock(&cdp->cdp_threadlock);
1162 mtx_unlock(&cdp->cdp_threadlock);
1164 if ((cdp->cdp_flags & CDP_UNREF_DTR) == 0) {
1168 mtx_lock(&cdevpriv_mtx);
1169 while ((p = LIST_FIRST(&cdp->cdp_fdpriv)) != NULL) {
1170 devfs_destroy_cdevpriv(p);
1171 mtx_lock(&cdevpriv_mtx);
1173 mtx_unlock(&cdevpriv_mtx);
1179 if (!(dev->si_flags & SI_ALIAS)) {
1181 LIST_REMOVE(dev, si_list);
1184 if (LIST_EMPTY(&csw->d_devs)) {
1189 dev->si_flags &= ~SI_ALIAS;
1190 cdp->cdp_flags &= ~CDP_UNREF_DTR;
1193 if (dev->si_refcount > 0)
1194 LIST_INSERT_HEAD(&
dead_cdevsw.d_devs, dev, si_list);
1202 struct cdev_priv *cdp;
1205 dev_lock_assert_locked();
1206 cdp = cdev2priv(dev);
1207 if ((cdp->cdp_flags & CDP_UNREF_DTR) != 0)
1209 cdp->cdp_flags |= CDP_UNREF_DTR;
1212 LIST_FOREACH(
child, &dev->si_children, si_siblings)
1232 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,
"delist_dev");
1242 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,
"destroy_dev");
1252 return (dev->si_name);
1261 if (strncmp(stem,
name, i) != 0)
1263 if (!isdigit(
name[i]))
1266 if (
name[i] ==
'0' && isdigit(
name[i+1]))
1268 while (isdigit(
name[i])) {
1270 u +=
name[i++] -
'0';
1307 *cdp =
malloc(
sizeof **cdp, M_DEVBUF, M_WAITOK | M_ZERO);
1308 LIST_INIT(&(*cdp)->head);
1313 struct cdev **dp,
int extra)
1316 struct cdev *dev, *ndev, *dl, *de;
1317 struct make_dev_args args;
1320 KASSERT(*cdp != NULL,
1321 (
"clone_setup() not called in driver \"%s\"", csw->d_name));
1322 KASSERT(!(extra & CLONE_UNITMASK),
1323 (
"Illegal extra bits (0x%x) in clone_create", extra));
1324 KASSERT(*up <= CLONE_UNITMASK,
1325 (
"Too high unit (0x%x) in clone_create", *up));
1326 KASSERT(csw->d_flags & D_NEEDMINOR,
1327 (
"clone_create() on cdevsw without minor numbers"));
1338 ndev = devfs_alloc(MAKEDEV_WAITOK);
1344 LIST_FOREACH(dev, &cd->head, si_clone) {
1345 KASSERT(dev->si_flags & SI_CLONELIST,
1346 (
"Dev %p(%s) should be on clonelist", dev, dev->si_name));
1348 if (u == (unit | extra)) {
1354 if (unit == -1 && u == low) {
1358 }
else if (u < (unit | extra)) {
1361 }
else if (u > (unit | extra)) {
1367 unit = low & CLONE_UNITMASK;
1368 make_dev_args_init(&args);
1369 args.mda_unit = unit | extra;
1370 args.mda_devsw = csw;
1371 dev =
newdev(&args, ndev);
1372 if (dev->si_flags & SI_CLONELIST) {
1373 printf(
"dev %p (%s) is on clonelist\n", dev, dev->si_name);
1374 printf(
"unit=%d, low=%d, extra=0x%x\n", unit, low, extra);
1375 LIST_FOREACH(dev, &cd->head, si_clone) {
1376 printf(
"\t%p %s\n", dev, dev->si_name);
1380 KASSERT(!(dev->si_flags & SI_CLONELIST),
1381 (
"Dev %p(%s) should not be on clonelist", dev, dev->si_name));
1383 LIST_INSERT_BEFORE(dl, dev, si_clone);
1384 else if (de != NULL)
1385 LIST_INSERT_AFTER(de, dev, si_clone);
1387 LIST_INSERT_HEAD(&cd->head, dev, si_clone);
1388 dev->si_flags |= SI_CLONELIST;
1402 struct cdev_priv *cp;
1409 while (!LIST_EMPTY(&cd->head)) {
1410 dev = LIST_FIRST(&cd->head);
1411 LIST_REMOVE(dev, si_clone);
1412 KASSERT(dev->si_flags & SI_CLONELIST,
1413 (
"Dev %p(%s) should be on clonelist", dev, dev->si_name));
1414 dev->si_flags &= ~SI_CLONELIST;
1415 cp = cdev2priv(dev);
1416 if (!(cp->cdp_flags & CDP_SCHED_DTR)) {
1417 cp->cdp_flags |= CDP_SCHED_DTR;
1418 KASSERT(dev->si_flags & SI_NAMED,
1419 (
"Driver has goofed in cloning underways udev %jx unit %x",
1420 (uintmax_t)dev2udev(dev), dev2unit(dev)));
1430 TAILQ_HEAD_INITIALIZER(dev_ddtr);
1431static struct task dev_dtr_task = TASK_INITIALIZER(0,
destroy_dev_tq, NULL);
1436 struct cdev_priv *cp;
1442 while (!TAILQ_EMPTY(&dev_ddtr)) {
1443 cp = TAILQ_FIRST(&dev_ddtr);
1445 KASSERT(cp->cdp_flags & CDP_SCHED_DTR,
1446 (
"cdev %p in dev_destroy_tq without CDP_SCHED_DTR", cp));
1447 TAILQ_REMOVE(&dev_ddtr, cp, cdp_dtr_list);
1448 cb = cp->cdp_dtr_cb;
1449 cb_arg = cp->cdp_dtr_cb_arg;
1467 struct cdev_priv *cp;
1469 dev_lock_assert_locked();
1470 cp = cdev2priv(dev);
1471 if (cp->cdp_flags & CDP_SCHED_DTR) {
1476 cp->cdp_flags |= CDP_SCHED_DTR;
1477 cp->cdp_dtr_cb = cb;
1478 cp->cdp_dtr_cb_arg = arg;
1479 TAILQ_INSERT_TAIL(&dev_ddtr, cp, cdp_dtr_list);
1505 while (!LIST_EMPTY(&csw->d_devs)) {
1506 msleep(&csw->d_devs, &
devmtx, PRIBIO,
"devscd",
hz/10);
1515 sx_xlock(&clone_drain_lock);
1516 sx_xunlock(&clone_drain_lock);
1521#include <sys/kernel.h>
1525DB_SHOW_COMMAND(cdev, db_show_cdev)
1527 struct cdev_priv *cdp;
1533 TAILQ_FOREACH(cdp, &cdevp_list, cdp_list) {
1535 db_printf(
"%s %p\n", dev->si_name, dev);
1542 dev = (
struct cdev *)
addr;
1543 cdp = cdev2priv(dev);
1544 db_printf(
"dev %s ref %d use %ld thr %ld inuse %u fdpriv %p\n",
1545 dev->si_name, dev->si_refcount, dev->si_usecount,
1546 dev->si_threadcount, cdp->cdp_inuse, cdp->cdp_fdpriv.lh_first);
1547 db_printf(
"devsw %p si_drv0 %d si_drv1 %p si_drv2 %p\n",
1548 dev->si_devsw, dev->si_drv0, dev->si_drv1, dev->si_drv2);
1549 flags = dev->si_flags;
1550#define SI_FLAG(flag) do { \
1551 if (flags & (flag)) { \
1552 if (buf[0] != '\0') \
1553 strlcat(buf, ", ", sizeof(buf)); \
1554 strlcat(buf, (#flag) + 3, sizeof(buf)); \
1559 SI_FLAG(SI_ETERNAL);
1563 SI_FLAG(SI_DUMPDEV);
1564 SI_FLAG(SI_CLONELIST);
1565 db_printf(
"si_flags %s\n",
buf);
1567 flags = cdp->cdp_flags;
1568#define CDP_FLAG(flag) do { \
1569 if (flags & (flag)) { \
1570 if (buf[0] != '\0') \
1571 strlcat(buf, ", ", sizeof(buf)); \
1572 strlcat(buf, (#flag) + 4, sizeof(buf)); \
1577 CDP_FLAG(CDP_ACTIVE);
1578 CDP_FLAG(CDP_SCHED_DTR);
1579 db_printf(
"cdp_flags %s\n",
buf);
static int prep_devname(struct cdev *dev, const char *fmt, va_list ap)
static void dev_free_devlocked(struct cdev *cdev)
void delist_dev(struct cdev *dev)
static int make_dev_credv(int flags, struct cdev **dres, struct cdevsw *devsw, int unit, struct ucred *cr, uid_t uid, gid_t gid, int mode, const char *fmt, va_list ap)
static int giant_poll(struct cdev *dev, int events, struct thread *td)
void drain_dev_clone_events(void)
static TAILQ_HEAD(cdev_priv)
static void giant_strategy(struct bio *bp)
int clone_create(struct clonedevs **cdp, struct cdevsw *csw, int *up, struct cdev **dp, int extra)
struct cdev * make_dev(struct cdevsw *devsw, int unit, uid_t uid, gid_t gid, int mode, const char *fmt,...)
static void notify(struct cdev *dev, const char *ev, int flags)
static void dev_unlock_and_free(void)
static void delist_dev_locked(struct cdev *dev)
static void fini_cdevsw(struct cdevsw *devsw)
static void destroy_dev_tq(void *ctx, int pending)
static int make_dev_sv(struct make_dev_args *args1, struct cdev **dres, const char *fmt, va_list ap)
int make_dev_p(int flags, struct cdev **cdev, struct cdevsw *devsw, struct ucred *cr, uid_t uid, gid_t gid, int mode, const char *fmt,...)
void make_dev_args_init_impl(struct make_dev_args *args, size_t sz)
void clone_cleanup(struct clonedevs **cdp)
int dev_stdclone(char *name, char **namep, const char *stem, int *unit)
static int giant_mmap_single(struct cdev *dev, vm_ooffset_t *offset, vm_size_t size, vm_object_t *object, int nprot)
const char * devtoname(struct cdev *dev)
static struct cdevsw dead_cdevsw
void clone_setup(struct clonedevs **cdp)
void dev_ref(struct cdev *dev)
void destroy_dev(struct cdev *dev)
static int prep_cdevsw(struct cdevsw *devsw, int flags)
static int giant_close(struct cdev *dev, int fflag, int devtype, struct thread *td)
static void cdevsw_free_devlocked(struct cdevsw *csw)
static int giant_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
static SLIST_HEAD(free_cdevsw, cdevsw)
static int no_poll(struct cdev *dev __unused, int events, struct thread *td __unused)
static void notify_destroy(struct cdev *dev)
int make_dev_physpath_alias(int flags, struct cdev **cdev, struct cdev *pdev, struct cdev *old_alias, const char *physpath)
struct cdev * make_dev_credf(int flags, struct cdevsw *devsw, int unit, struct ucred *cr, uid_t uid, gid_t gid, int mode, const char *fmt,...)
static void notify_create(struct cdev *dev, int flags)
int destroy_dev_sched(struct cdev *dev)
int destroy_dev_sched_cb(struct cdev *dev, void(*cb)(void *), void *arg)
static int giant_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag, struct thread *td)
static int giant_write(struct cdev *dev, struct uio *uio, int ioflag)
void dev_rel(struct cdev *dev)
static int giant_mmap(struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr, int nprot, vm_memattr_t *memattr)
void destroy_dev_drain(struct cdevsw *csw)
int make_dev_s(struct make_dev_args *args, struct cdev **dres, const char *fmt,...)
void dev_depends(struct cdev *pdev, struct cdev *cdev)
struct cdev * make_dev_cred(struct cdevsw *devsw, int unit, struct ucred *cr, uid_t uid, gid_t gid, int mode, const char *fmt,...)
static void destroy_devl(struct cdev *dev)
static int giant_read(struct cdev *dev, struct uio *uio, int ioflag)
static MALLOC_DEFINE(M_DEVT, "cdev", "cdev storage")
void dev_relthread(struct cdev *dev, int ref)
static int giant_kqfilter(struct cdev *dev, struct knote *kn)
struct cdevsw * devvn_refthread(struct vnode *vp, struct cdev **devp, int *ref)
struct cdevsw * dev_refthread(struct cdev *dev, int *ref)
struct cdev * make_dev_alias(struct cdev *pdev, const char *fmt,...)
static void dev_dependsl(struct cdev *pdev, struct cdev *cdev)
static int make_dev_alias_v(int flags, struct cdev **cdev, struct cdev *pdev, const char *fmt, va_list ap)
static int giant_fdopen(struct cdev *dev, int oflags, struct thread *td, struct file *fp)
static void dead_strategy(struct bio *bp)
void dev_refl(struct cdev *dev)
int make_dev_alias_p(int flags, struct cdev **cdev, struct cdev *pdev, const char *fmt,...)
static struct cdev * newdev(struct make_dev_args *args, struct cdev *si)
#define FIXUP(member, noop, giant)
static int destroy_dev_sched_cbl(struct cdev *dev, void(*cb)(void *), void *arg)
static void no_strategy(struct bio *bp)
static struct cdev_priv_list cdevp_free_list
void knote(struct knlist *list, long hint, int lockflags)
void *() malloc(size_t size, struct malloc_type *mtp, int flags)
void free(void *addr, struct malloc_type *mtp)
struct mtx __exclusive_cache_line Giant
struct ucred * crhold(struct ucred *cr)
void panic(const char *fmt,...)
void wakeup(const void *ident)
void devctl_notify(const char *system, const char *subsystem, const char *type, const char *data)
Send a 'notification' to userland, using standard ways.
int vsnrprintf(char *str, size_t size, int radix, const char *format, va_list ap)
int printf(const char *fmt,...)
int sprintf(char *buf, const char *cfmt,...)
int taskqueue_enqueue(struct taskqueue *queue, struct task *task)
void clean_unrhdrl(struct unrhdr *uh)
int poll_no_poll(int events)
void biofinish(struct bio *bp, struct devstat *stat, int error)