Current Path : /sys/netsmb/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/netsmb/smb_dev.c |
/*- * Copyright (c) 2000-2001 Boris Popov * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <sys/cdefs.h> __FBSDID("$FreeBSD: release/9.1.0/sys/netsmb/smb_dev.c 206361 2010-04-07 16:50:38Z joel $"); #include <sys/param.h> #include <sys/kernel.h> #include <sys/module.h> #include <sys/systm.h> #include <sys/conf.h> #include <sys/fcntl.h> #include <sys/ioccom.h> #include <sys/lock.h> #include <sys/malloc.h> #include <sys/file.h> /* Must come after sys/malloc.h */ #include <sys/filedesc.h> #include <sys/mbuf.h> #include <sys/poll.h> #include <sys/proc.h> #include <sys/select.h> #include <sys/socket.h> #include <sys/socketvar.h> #include <sys/sysctl.h> #include <sys/uio.h> #include <sys/vnode.h> #include <net/if.h> #include <netsmb/smb.h> #include <netsmb/smb_conn.h> #include <netsmb/smb_subr.h> #include <netsmb/smb_dev.h> #define SMB_GETDEV(dev) ((struct smb_dev*)(dev)->si_drv1) #define SMB_CHECKMINOR(dev) do { \ sdp = SMB_GETDEV(dev); \ if (sdp == NULL) return ENXIO; \ } while(0) static d_open_t nsmb_dev_open; static d_close_t nsmb_dev_close; static d_ioctl_t nsmb_dev_ioctl; MODULE_DEPEND(netsmb, libiconv, 1, 1, 2); MODULE_VERSION(netsmb, NSMB_VERSION); static int smb_version = NSMB_VERSION; SYSCTL_DECL(_net_smb); SYSCTL_INT(_net_smb, OID_AUTO, version, CTLFLAG_RD, &smb_version, 0, ""); static MALLOC_DEFINE(M_NSMBDEV, "NETSMBDEV", "NET/SMB device"); /* int smb_dev_queue(struct smb_dev *ndp, struct smb_rq *rqp, int prio); */ static struct cdevsw nsmb_cdevsw = { .d_version = D_VERSION, .d_flags = D_NEEDGIANT | D_NEEDMINOR, .d_open = nsmb_dev_open, .d_close = nsmb_dev_close, .d_ioctl = nsmb_dev_ioctl, .d_name = NSMB_NAME }; static eventhandler_tag nsmb_dev_tag; static struct clonedevs *nsmb_clones; static void nsmb_dev_clone(void *arg, struct ucred *cred, char *name, int namelen, struct cdev **dev) { int i, u; if (*dev != NULL) return; if (strcmp(name, NSMB_NAME) == 0) u = -1; else if (dev_stdclone(name, NULL, NSMB_NAME, &u) != 1) return; i = clone_create(&nsmb_clones, &nsmb_cdevsw, &u, dev, 0); if (i) { *dev = make_dev(&nsmb_cdevsw, u, UID_ROOT, GID_WHEEL, 0600, "%s%d", NSMB_NAME, u); if (*dev != NULL) { dev_ref(*dev); (*dev)->si_flags |= SI_CHEAPCLONE; } } } static int nsmb_dev_open(struct cdev *dev, int oflags, int devtype, struct thread *td) { struct smb_dev *sdp; struct ucred *cred = td->td_ucred; int s; sdp = SMB_GETDEV(dev); if (sdp && (sdp->sd_flags & NSMBFL_OPEN)) return EBUSY; if (sdp == NULL) { sdp = malloc(sizeof(*sdp), M_NSMBDEV, M_WAITOK); dev->si_drv1 = (void*)sdp; } /* * XXX: this is just crazy - make a device for an already passed device... * someone should take care of it. */ if ((dev->si_flags & SI_NAMED) == 0) make_dev(&nsmb_cdevsw, dev2unit(dev), cred->cr_uid, cred->cr_gid, 0700, NSMB_NAME"%d", dev2unit(dev)); bzero(sdp, sizeof(*sdp)); /* STAILQ_INIT(&sdp->sd_rqlist); STAILQ_INIT(&sdp->sd_rplist); bzero(&sdp->sd_pollinfo, sizeof(struct selinfo)); */ s = splimp(); sdp->sd_level = -1; sdp->sd_flags |= NSMBFL_OPEN; splx(s); return 0; } static int nsmb_dev_close(struct cdev *dev, int flag, int fmt, struct thread *td) { struct smb_dev *sdp; struct smb_vc *vcp; struct smb_share *ssp; struct smb_cred scred; int s; SMB_CHECKMINOR(dev); s = splimp(); if ((sdp->sd_flags & NSMBFL_OPEN) == 0) { splx(s); return EBADF; } smb_makescred(&scred, td, NULL); ssp = sdp->sd_share; if (ssp != NULL) smb_share_rele(ssp, &scred); vcp = sdp->sd_vc; if (vcp != NULL) smb_vc_rele(vcp, &scred); /* smb_flushq(&sdp->sd_rqlist); smb_flushq(&sdp->sd_rplist); */ dev->si_drv1 = NULL; free(sdp, M_NSMBDEV); destroy_dev_sched(dev); splx(s); return 0; } static int nsmb_dev_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td) { struct smb_dev *sdp; struct smb_vc *vcp; struct smb_share *ssp; struct smb_cred scred; int error = 0; SMB_CHECKMINOR(dev); if ((sdp->sd_flags & NSMBFL_OPEN) == 0) return EBADF; smb_makescred(&scred, td, NULL); switch (cmd) { case SMBIOC_OPENSESSION: if (sdp->sd_vc) return EISCONN; error = smb_usr_opensession((struct smbioc_ossn*)data, &scred, &vcp); if (error) break; sdp->sd_vc = vcp; smb_vc_unlock(vcp, 0); sdp->sd_level = SMBL_VC; break; case SMBIOC_OPENSHARE: if (sdp->sd_share) return EISCONN; if (sdp->sd_vc == NULL) return ENOTCONN; error = smb_usr_openshare(sdp->sd_vc, (struct smbioc_oshare*)data, &scred, &ssp); if (error) break; sdp->sd_share = ssp; smb_share_unlock(ssp, 0); sdp->sd_level = SMBL_SHARE; break; case SMBIOC_REQUEST: if (sdp->sd_share == NULL) return ENOTCONN; error = smb_usr_simplerequest(sdp->sd_share, (struct smbioc_rq*)data, &scred); break; case SMBIOC_T2RQ: if (sdp->sd_share == NULL) return ENOTCONN; error = smb_usr_t2request(sdp->sd_share, (struct smbioc_t2rq*)data, &scred); break; case SMBIOC_SETFLAGS: { struct smbioc_flags *fl = (struct smbioc_flags*)data; int on; if (fl->ioc_level == SMBL_VC) { if (fl->ioc_mask & SMBV_PERMANENT) { on = fl->ioc_flags & SMBV_PERMANENT; if ((vcp = sdp->sd_vc) == NULL) return ENOTCONN; error = smb_vc_get(vcp, LK_EXCLUSIVE, &scred); if (error) break; if (on && (vcp->obj.co_flags & SMBV_PERMANENT) == 0) { vcp->obj.co_flags |= SMBV_PERMANENT; smb_vc_ref(vcp); } else if (!on && (vcp->obj.co_flags & SMBV_PERMANENT)) { vcp->obj.co_flags &= ~SMBV_PERMANENT; smb_vc_rele(vcp, &scred); } smb_vc_put(vcp, &scred); } else error = EINVAL; } else if (fl->ioc_level == SMBL_SHARE) { if (fl->ioc_mask & SMBS_PERMANENT) { on = fl->ioc_flags & SMBS_PERMANENT; if ((ssp = sdp->sd_share) == NULL) return ENOTCONN; error = smb_share_get(ssp, LK_EXCLUSIVE, &scred); if (error) break; if (on && (ssp->obj.co_flags & SMBS_PERMANENT) == 0) { ssp->obj.co_flags |= SMBS_PERMANENT; smb_share_ref(ssp); } else if (!on && (ssp->obj.co_flags & SMBS_PERMANENT)) { ssp->obj.co_flags &= ~SMBS_PERMANENT; smb_share_rele(ssp, &scred); } smb_share_put(ssp, &scred); } else error = EINVAL; break; } else error = EINVAL; break; } case SMBIOC_LOOKUP: if (sdp->sd_vc || sdp->sd_share) return EISCONN; vcp = NULL; ssp = NULL; error = smb_usr_lookup((struct smbioc_lookup*)data, &scred, &vcp, &ssp); if (error) break; if (vcp) { sdp->sd_vc = vcp; smb_vc_unlock(vcp, 0); sdp->sd_level = SMBL_VC; } if (ssp) { sdp->sd_share = ssp; smb_share_unlock(ssp, 0); sdp->sd_level = SMBL_SHARE; } break; case SMBIOC_READ: case SMBIOC_WRITE: { struct smbioc_rw *rwrq = (struct smbioc_rw*)data; struct uio auio; struct iovec iov; if ((ssp = sdp->sd_share) == NULL) return ENOTCONN; iov.iov_base = rwrq->ioc_base; iov.iov_len = rwrq->ioc_cnt; auio.uio_iov = &iov; auio.uio_iovcnt = 1; auio.uio_offset = rwrq->ioc_offset; auio.uio_resid = rwrq->ioc_cnt; auio.uio_segflg = UIO_USERSPACE; auio.uio_rw = (cmd == SMBIOC_READ) ? UIO_READ : UIO_WRITE; auio.uio_td = td; if (cmd == SMBIOC_READ) error = smb_read(ssp, rwrq->ioc_fh, &auio, &scred); else error = smb_write(ssp, rwrq->ioc_fh, &auio, &scred); rwrq->ioc_cnt -= auio.uio_resid; break; } default: error = ENODEV; } return error; } static int nsmb_dev_load(module_t mod, int cmd, void *arg) { int error = 0; switch (cmd) { case MOD_LOAD: error = smb_sm_init(); if (error) break; error = smb_iod_init(); if (error) { smb_sm_done(); break; } clone_setup(&nsmb_clones); nsmb_dev_tag = EVENTHANDLER_REGISTER(dev_clone, nsmb_dev_clone, 0, 1000); break; case MOD_UNLOAD: smb_iod_done(); error = smb_sm_done(); if (error) break; EVENTHANDLER_DEREGISTER(dev_clone, nsmb_dev_tag); drain_dev_clone_events(); clone_cleanup(&nsmb_clones); destroy_dev_drain(&nsmb_cdevsw); break; default: error = EINVAL; break; } return error; } DEV_MODULE (dev_netsmb, nsmb_dev_load, 0); /* * Convert a file descriptor to appropriate smb_share pointer */ static struct file* nsmb_getfp(struct filedesc* fdp, int fd, int flag) { struct file* fp; FILEDESC_SLOCK(fdp); if (((u_int)fd) >= fdp->fd_nfiles || (fp = fdp->fd_ofiles[fd]) == NULL || (fp->f_flag & flag) == 0) { FILEDESC_SUNLOCK(fdp); return (NULL); } fhold(fp); FILEDESC_SUNLOCK(fdp); return (fp); } int smb_dev2share(int fd, int mode, struct smb_cred *scred, struct smb_share **sspp) { struct file *fp; struct vnode *vp; struct smb_dev *sdp; struct smb_share *ssp; struct cdev *dev; int error; fp = nsmb_getfp(scred->scr_td->td_proc->p_fd, fd, FREAD | FWRITE); if (fp == NULL) return EBADF; vp = fp->f_vnode; if (vp == NULL) { fdrop(fp, curthread); return EBADF; } if (vp->v_type != VCHR) { fdrop(fp, curthread); return EBADF; } dev = vp->v_rdev; SMB_CHECKMINOR(dev); ssp = sdp->sd_share; if (ssp == NULL) { fdrop(fp, curthread); return ENOTCONN; } error = smb_share_get(ssp, LK_EXCLUSIVE, scred); if (error == 0) *sspp = ssp; fdrop(fp, curthread); return error; }