/* * Close a file or directory */ static int pfs_close(struct vop_close_args *va) { struct vnode *vn = va->a_vp; struct pfs_vdata *pvd = vn->v_data; struct pfs_node *pn = pvd->pvd_pn; struct proc *proc; int error; PFS_TRACE(("%s", pn->pn_name)); pfs_assert_not_owned(pn); /* * Do nothing unless this is the last close and the node has a * last-close handler. */ if (vrefcnt(vn) > 1 || pn->pn_close == NULL) PFS_RETURN (0); if (pvd->pvd_pid != NO_PID) { proc = pfind(pvd->pvd_pid); } else { proc = NULL; } error = pn_close(va->a_td, proc, pn); if (proc != NULL) PROC_UNLOCK(proc); PFS_RETURN (error); }
static __inline struct vnode * union_lock_upper(struct union_node *un, struct thread *td) { struct vnode *uppervp; if ((uppervp = un->un_uppervp) != NULL) { VREF(uppervp); vn_lock(uppervp, LK_EXCLUSIVE | LK_CANRECURSE | LK_RETRY, td); } KASSERT((uppervp == NULL || vrefcnt(uppervp) > 0), ("uppervp usecount is 0")); return(uppervp); }
int msdosfs_inactive(struct vop_inactive_args *ap) { struct vnode *vp = ap->a_vp; struct denode *dep = VTODE(vp); int error = 0; #ifdef MSDOSFS_DEBUG printf("msdosfs_inactive(): dep %p, de_Name[0] %x\n", dep, dep->de_Name[0]); #endif /* * Ignore denodes related to stale file handles. */ if (dep->de_Name[0] == SLOT_DELETED || dep->de_Name[0] == SLOT_EMPTY) goto out; /* * If the file has been deleted and it is on a read/write * filesystem, then truncate the file, and mark the directory slot * as empty. (This may not be necessary for the dos filesystem.) */ #ifdef MSDOSFS_DEBUG printf("msdosfs_inactive(): dep %p, refcnt %ld, mntflag %llx, MNT_RDONLY %llx\n", dep, dep->de_refcnt, (unsigned long long)vp->v_mount->mnt_flag, (unsigned long long)MNT_RDONLY); #endif if (dep->de_refcnt <= 0 && (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { error = detrunc(dep, (u_long) 0, 0, NOCRED); dep->de_flag |= DE_UPDATE; dep->de_Name[0] = SLOT_DELETED; } deupdat(dep, 0); out: /* * If we are done with the denode, reclaim it * so that it can be reused immediately. */ #ifdef MSDOSFS_DEBUG printf("msdosfs_inactive(): v_usecount %d, de_Name[0] %x\n", vrefcnt(vp), dep->de_Name[0]); #endif if (dep->de_Name[0] == SLOT_DELETED || dep->de_Name[0] == SLOT_EMPTY) vrecycle(vp); return (error); }
/* * Increasing refcount of lower vnode is needed at least for the case * when lower FS is NFS to do sillyrename if the file is in use. * Unfortunately v_usecount is incremented in many places in * the kernel and, as such, there may be races that result in * the NFS client doing an extraneous silly rename, but that seems * preferable to not doing a silly rename when it is needed. */ static int null_remove(struct vop_remove_args *ap) { int retval, vreleit; struct vnode *lvp; if (vrefcnt(ap->a_vp) > 1) { lvp = NULLVPTOLOWERVP(ap->a_vp); VREF(lvp); vreleit = 1; } else vreleit = 0; retval = null_bypass(&ap->a_gen); if (vreleit != 0) vrele(lvp); return (retval); }
int nwfs_sysctl_vnprint(SYSCTL_HANDLER_ARGS) { struct nwnode *np; struct nwnode_hash_head *nhpp; struct vnode *vp; int i; if (nwfs_debuglevel == 0) return 0; printf("Name:uc:hc:fid:pfid\n"); for(i = 0; i <= nwnodehash; i++) { nhpp = &nwhashtbl[i]; LIST_FOREACH(np, nhpp, n_hash) { vp = NWTOV(np); vprint("", vp); printf("%s:%d:%d:%d:%d\n",np->n_name,vrefcnt(vp), vp->v_holdcnt,np->n_fid.f_id, np->n_fid.f_parent); } }
/* * Increasing refcount of lower vnode is needed at least for the case * when lower FS is NFS to do sillyrename if the file is in use. * Unfortunately v_usecount is incremented in many places in * the kernel and, as such, there may be races that result in * the NFS client doing an extraneous silly rename, but that seems * preferable to not doing a silly rename when it is needed. */ static int crypto_remove(struct vop_remove_args *ap) { int retval, vreleit; struct vnode *lvp, *vp; vp = ap->a_vp; if (vrefcnt(vp) > 1) { lvp = NULLVPTOLOWERVP(vp); VREF(lvp); vreleit = 1; } else vreleit = 0; VTONULL(vp)->crypto_flags |= NULLV_DROP; retval = crypto_bypass(&ap->a_gen); if (vreleit != 0) vrele(lvp); return (retval); }
static int smbfs_mount(struct mount *mp) { struct smbmount *smp = NULL; struct smb_vc *vcp; struct smb_share *ssp = NULL; struct vnode *vp; struct thread *td; struct smb_dev *dev; struct smb_cred *scred; int error, v; char *pc, *pe; dev = NULL; td = curthread; if (mp->mnt_flag & (MNT_UPDATE | MNT_ROOTFS)) return EOPNOTSUPP; if (vfs_filteropt(mp->mnt_optnew, smbfs_opts)) { vfs_mount_error(mp, "%s", "Invalid option"); return (EINVAL); } scred = smbfs_malloc_scred(); smb_makescred(scred, td, td->td_ucred); /* Ask userspace of `fd`, the file descriptor of this session */ if (1 != vfs_scanopt(mp->mnt_optnew, "fd", "%d", &v)) { vfs_mount_error(mp, "No fd option"); smbfs_free_scred(scred); return (EINVAL); } error = smb_dev2share(v, SMBM_EXEC, scred, &ssp, &dev); smp = malloc(sizeof(*smp), M_SMBFSDATA, M_WAITOK | M_ZERO); if (error) { printf("invalid device handle %d (%d)\n", v, error); vfs_mount_error(mp, "invalid device handle %d %d\n", v, error); smbfs_free_scred(scred); free(smp, M_SMBFSDATA); return error; } vcp = SSTOVC(ssp); smb_share_unlock(ssp); mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax; mp->mnt_data = smp; smp->sm_share = ssp; smp->sm_root = NULL; smp->sm_dev = dev; if (1 != vfs_scanopt(mp->mnt_optnew, "caseopt", "%d", &smp->sm_caseopt)) { vfs_mount_error(mp, "Invalid caseopt"); error = EINVAL; goto bad; } if (1 != vfs_scanopt(mp->mnt_optnew, "uid", "%d", &v)) { vfs_mount_error(mp, "Invalid uid"); error = EINVAL; goto bad; } smp->sm_uid = v; if (1 != vfs_scanopt(mp->mnt_optnew, "gid", "%d", &v)) { vfs_mount_error(mp, "Invalid gid"); error = EINVAL; goto bad; } smp->sm_gid = v; if (1 != vfs_scanopt(mp->mnt_optnew, "file_mode", "%d", &v)) { vfs_mount_error(mp, "Invalid file_mode"); error = EINVAL; goto bad; } smp->sm_file_mode = (v & (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; if (1 != vfs_scanopt(mp->mnt_optnew, "dir_mode", "%d", &v)) { vfs_mount_error(mp, "Invalid dir_mode"); error = EINVAL; goto bad; } smp->sm_dir_mode = (v & (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; vfs_flagopt(mp->mnt_optnew, "nolong", &smp->sm_flags, SMBFS_MOUNT_NO_LONG); pc = mp->mnt_stat.f_mntfromname; pe = pc + sizeof(mp->mnt_stat.f_mntfromname); bzero(pc, MNAMELEN); *pc++ = '/'; *pc++ = '/'; pc = strchr(strncpy(pc, vcp->vc_username, pe - pc - 2), 0); if (pc < pe-1) { *(pc++) = '@'; pc = strchr(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0); if (pc < pe - 1) { *(pc++) = '/'; strncpy(pc, ssp->ss_name, pe - pc - 2); } } vfs_getnewfsid(mp); error = smbfs_root(mp, LK_EXCLUSIVE, &vp); if (error) { vfs_mount_error(mp, "smbfs_root error: %d", error); goto bad; } VOP_UNLOCK(vp, 0); SMBVDEBUG("root.v_usecount = %d\n", vrefcnt(vp)); #ifdef DIAGNOSTIC SMBERROR("mp=%p\n", mp); #endif smbfs_free_scred(scred); return error; bad: if (ssp) smb_share_put(ssp, scred); smbfs_free_scred(scred); SMB_LOCK(); if (error && smp->sm_dev == dev) { smp->sm_dev = NULL; sdp_trydestroy(dev); } SMB_UNLOCK(); free(smp, M_SMBFSDATA); return error; }
/* * mp - path - addr in user space of mount point (ie /usr or whatever) * data - addr in user space of mount params */ static int nwfs_mount(struct mount *mp) { struct nwfs_args args; /* will hold data from mount request */ int error; struct nwmount *nmp = NULL; struct ncp_conn *conn = NULL; struct ncp_handle *handle = NULL; struct vnode *vp; struct thread *td; char *pc,*pe; td = curthread; if (mp->mnt_flag & MNT_ROOTFS) return (EOPNOTSUPP); if (mp->mnt_flag & MNT_UPDATE) { nwfs_printf("MNT_UPDATE not implemented"); return (EOPNOTSUPP); } error = vfs_copyopt(mp->mnt_optnew, "nwfs_args", &args, sizeof args); if (error) return (error); if (args.version != NWFS_VERSION) { nwfs_printf("mount version mismatch: kernel=%d, mount=%d\n",NWFS_VERSION,args.version); return (1); } error = ncp_conn_getbyref(args.connRef, td , td->td_ucred,NCPM_EXECUTE,&conn); if (error) { nwfs_printf("invalid connection refernce %d\n",args.connRef); return (error); } error = ncp_conn_gethandle(conn, NULL, &handle); if (error) { nwfs_printf("can't get connection handle\n"); return (error); } ncp_conn_unlock(conn, td); /* we keep the ref */ mp->mnt_stat.f_iosize = conn->buffer_size; /* We must malloc our own mount info */ nmp = malloc(sizeof(struct nwmount),M_NWFSDATA, M_WAITOK | M_USE_RESERVE | M_ZERO); if (nmp == NULL) { nwfs_printf("could not alloc nwmount\n"); error = ENOMEM; goto bad; } mp->mnt_data = nmp; nmp->connh = handle; nmp->n_root = NULL; nmp->n_id = nwfsid++; nmp->m = args; nmp->m.file_mode = (nmp->m.file_mode & (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; nmp->m.dir_mode = (nmp->m.dir_mode & (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; if ((error = nwfs_initnls(nmp)) != 0) goto bad; pc = mp->mnt_stat.f_mntfromname; pe = pc+sizeof(mp->mnt_stat.f_mntfromname); bzero(pc, MNAMELEN); *(pc++) = '/'; pc = index(strncpy(pc, conn->li.server, pe-pc-2),0); if (pc < pe-1) { *(pc++) = ':'; pc=index(strncpy(pc, conn->li.user, pe-pc-2),0); if (pc < pe-1) { *(pc++) = '/'; strncpy(pc, nmp->m.mounted_vol, pe-pc-2); } } /* protect against invalid mount points */ nmp->m.mount_point[sizeof(nmp->m.mount_point)-1] = '\0'; vfs_getnewfsid(mp); error = nwfs_root(mp, LK_EXCLUSIVE, &vp); if (error) goto bad; /* * Lose the lock but keep the ref. */ VOP_UNLOCK(vp, 0); NCPVODEBUG("rootvp.vrefcnt=%d\n",vrefcnt(vp)); return error; bad: if (nmp) free(nmp, M_NWFSDATA); if (handle) ncp_conn_puthandle(handle, NULL, 0); return error; }