version 1.17.2.1, 2005/11/02 12:38:59 |
version 1.17.2.2, 2005/11/10 14:09:44 |
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/* $NetBSD$ */ |
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/* |
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* Copyright (c) 2005 The NetBSD Foundation, Inc. |
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* All rights reserved. |
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* |
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* This code is derived from software contributed to The NetBSD Foundation |
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* by Julio M. Merino Vidal, developed as part of Google's Summer of Code |
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* 2005 program. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. All advertising materials mentioning features or use of this software |
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* must display the following acknowledgement: |
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* This product includes software developed by the NetBSD |
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* Foundation, Inc. and its contributors. |
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* 4. Neither the name of The NetBSD Foundation nor the names of its |
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* contributors may be used to endorse or promote products derived |
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* from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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/* |
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* tmpfs vnode interface. |
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*/ |
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#include <sys/cdefs.h> |
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__KERNEL_RCSID(0, "$NetBSD$"); |
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#include <sys/param.h> |
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#include <sys/dirent.h> |
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#include <sys/fcntl.h> |
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#include <sys/event.h> |
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#include <sys/malloc.h> |
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#include <sys/namei.h> |
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#include <sys/proc.h> |
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#include <sys/stat.h> |
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#include <sys/uio.h> |
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#include <sys/unistd.h> |
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#include <sys/vnode.h> |
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#include <sys/lockf.h> |
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#include <uvm/uvm.h> |
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#include <miscfs/fifofs/fifo.h> |
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#include <fs/tmpfs/tmpfs_vnops.h> |
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#include <fs/tmpfs/tmpfs.h> |
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/* --------------------------------------------------------------------- */ |
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|
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/* |
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* vnode operations vector used for files stored in a tmpfs file system. |
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*/ |
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int (**tmpfs_vnodeop_p)(void *); |
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const struct vnodeopv_entry_desc tmpfs_vnodeop_entries[] = { |
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{ &vop_default_desc, vn_default_error }, |
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{ &vop_lookup_desc, tmpfs_lookup }, |
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{ &vop_create_desc, tmpfs_create }, |
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{ &vop_mknod_desc, tmpfs_mknod }, |
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{ &vop_open_desc, tmpfs_open }, |
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{ &vop_close_desc, tmpfs_close }, |
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{ &vop_access_desc, tmpfs_access }, |
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{ &vop_getattr_desc, tmpfs_getattr }, |
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{ &vop_setattr_desc, tmpfs_setattr }, |
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{ &vop_read_desc, tmpfs_read }, |
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{ &vop_write_desc, tmpfs_write }, |
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{ &vop_ioctl_desc, tmpfs_ioctl }, |
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{ &vop_fcntl_desc, tmpfs_fcntl }, |
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{ &vop_poll_desc, tmpfs_poll }, |
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{ &vop_kqfilter_desc, tmpfs_kqfilter }, |
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{ &vop_revoke_desc, tmpfs_revoke }, |
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{ &vop_mmap_desc, tmpfs_mmap }, |
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{ &vop_fsync_desc, tmpfs_fsync }, |
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{ &vop_seek_desc, tmpfs_seek }, |
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{ &vop_remove_desc, tmpfs_remove }, |
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{ &vop_link_desc, tmpfs_link }, |
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{ &vop_rename_desc, tmpfs_rename }, |
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{ &vop_mkdir_desc, tmpfs_mkdir }, |
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{ &vop_rmdir_desc, tmpfs_rmdir }, |
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{ &vop_symlink_desc, tmpfs_symlink }, |
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{ &vop_readdir_desc, tmpfs_readdir }, |
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{ &vop_readlink_desc, tmpfs_readlink }, |
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{ &vop_abortop_desc, tmpfs_abortop }, |
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{ &vop_inactive_desc, tmpfs_inactive }, |
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{ &vop_reclaim_desc, tmpfs_reclaim }, |
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{ &vop_lock_desc, tmpfs_lock }, |
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{ &vop_unlock_desc, tmpfs_unlock }, |
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{ &vop_bmap_desc, tmpfs_bmap }, |
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{ &vop_strategy_desc, tmpfs_strategy }, |
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{ &vop_print_desc, tmpfs_print }, |
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{ &vop_pathconf_desc, tmpfs_pathconf }, |
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{ &vop_islocked_desc, tmpfs_islocked }, |
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{ &vop_advlock_desc, tmpfs_advlock }, |
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{ &vop_lease_desc, tmpfs_lease }, |
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{ &vop_bwrite_desc, tmpfs_bwrite }, |
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{ &vop_getpages_desc, tmpfs_getpages }, |
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{ &vop_putpages_desc, tmpfs_putpages }, |
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{ NULL, NULL } |
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}; |
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const struct vnodeopv_desc tmpfs_vnodeop_opv_desc = |
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{ &tmpfs_vnodeop_p, tmpfs_vnodeop_entries }; |
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/* --------------------------------------------------------------------- */ |
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int |
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tmpfs_lookup(void *v) |
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{ |
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struct vnode *dvp = ((struct vop_lookup_args *)v)->a_dvp; |
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struct vnode **vpp = ((struct vop_lookup_args *)v)->a_vpp; |
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struct componentname *cnp = ((struct vop_lookup_args *)v)->a_cnp; |
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int error; |
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struct tmpfs_dirent *de; |
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struct tmpfs_node *dnode; |
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KASSERT(VOP_ISLOCKED(dvp)); |
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dnode = VP_TO_TMPFS_DIR(dvp); |
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*vpp = NULL; |
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/* Check accessibility of requested node as a first step. */ |
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error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc); |
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if (error != 0) |
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goto out; |
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/* If requesting the last path component on a read-only file system |
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* with a write operation, deny it. */ |
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if ((cnp->cn_flags & ISLASTCN) && |
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(dvp->v_mount->mnt_flag & MNT_RDONLY) && |
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(cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) { |
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error = EROFS; |
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goto out; |
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} |
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/* Avoid doing a linear scan of the directory if the requested |
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* directory/name couple is already in the cache. */ |
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error = cache_lookup(dvp, vpp, cnp); |
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if (error >= 0) |
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goto out; |
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/* We cannot be requesting the parent directory of the root node. */ |
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KASSERT(IMPLIES(dnode->tn_type == VDIR && |
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dnode->tn_parent == dnode, !(cnp->cn_flags & ISDOTDOT))); |
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if (cnp->cn_flags & ISDOTDOT) { |
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VOP_UNLOCK(dvp, 0); |
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/* Allocate a new vnode on the matching entry. */ |
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error = tmpfs_alloc_vp(dvp->v_mount, dnode->tn_parent, vpp); |
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if (cnp->cn_flags & LOCKPARENT && |
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cnp->cn_flags & ISLASTCN) { |
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if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) != 0) |
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cnp->cn_flags |= PDIRUNLOCK; |
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} |
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dnode->tn_parent->tn_lookup_dirent = NULL; |
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} else if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { |
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VREF(dvp); |
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*vpp = dvp; |
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dnode->tn_lookup_dirent = NULL; |
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error = 0; |
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} else { |
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de = tmpfs_dir_lookup(dnode, cnp); |
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if (de == NULL) { |
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/* The entry was not found in the directory. |
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* This is OK iff we are creating or renaming an |
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* entry and are working on the last component of |
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* the path name. */ |
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if ((cnp->cn_flags & ISLASTCN) && |
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(cnp->cn_nameiop == CREATE || \ |
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cnp->cn_nameiop == RENAME)) { |
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error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, |
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cnp->cn_proc); |
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if (error != 0) |
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goto out; |
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/* Keep the component name in the buffer for |
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* future uses. */ |
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cnp->cn_flags |= SAVENAME; |
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error = EJUSTRETURN; |
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} else |
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error = ENOENT; |
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} else { |
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struct tmpfs_node *tnode; |
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/* The entry was found, so get its associated |
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* tmpfs_node. */ |
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tnode = de->td_node; |
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/* If we are not at the last path component and |
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* found a non-directory or non-link entry (which |
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* may itself be pointing to a directory), raise |
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* an error. */ |
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if ((tnode->tn_type != VDIR && |
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tnode->tn_type != VLNK) && |
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!(cnp->cn_flags & ISLASTCN)) { |
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error = ENOTDIR; |
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goto out; |
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} |
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/* If we are deleting or renaming the entry, keep |
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* track of its tmpfs_dirent so that it can be |
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* easily deleted later. */ |
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if ((cnp->cn_flags & ISLASTCN) && |
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(cnp->cn_nameiop == DELETE || |
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cnp->cn_nameiop == RENAME)) { |
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error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, |
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cnp->cn_proc); |
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if (error != 0) |
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goto out; |
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/* TODO: Check sticky bit. */ |
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tnode->tn_lookup_dirent = de; |
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} |
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/* Allocate a new vnode on the matching entry. */ |
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error = tmpfs_alloc_vp(dvp->v_mount, tnode, vpp); |
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if (error == 0 && (!(cnp->cn_flags & LOCKPARENT) || |
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!(cnp->cn_flags & ISLASTCN))) |
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VOP_UNLOCK(dvp, 0); |
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} |
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} |
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/* Store the result of this lookup in the cache. Avoid this if the |
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* request was for creation, as it does not improve timings on |
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* emprical tests. */ |
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if ((cnp->cn_flags & MAKEENTRY) && cnp->cn_nameiop != CREATE) |
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cache_enter(dvp, *vpp, cnp); |
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out: |
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/* If there were no errors, *vpp cannot be null and it must be |
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* locked. */ |
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KASSERT(IFF(error == 0, *vpp != NULL && VOP_ISLOCKED(*vpp))); |
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/* dvp has to be locked if: |
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* - There were errors and relocking of dvp did not fail. |
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* - We are doing a '..' lookup, relocking of dvp did not fail |
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* (PDIRUNLOCK is unset) and LOCKPARENT or ISLASTCN are not set. |
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* - LOCKPARENT and ISLASTCN are set. */ |
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KASSERT(IMPLIES( |
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(error != 0 && !(cnp->cn_flags & PDIRUNLOCK)) || |
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(cnp->cn_flags & ISDOTDOT && !(cnp->cn_flags & PDIRUNLOCK) && |
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((cnp->cn_flags & LOCKPARENT) && (cnp->cn_flags & ISLASTCN))) || |
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(cnp->cn_flags & LOCKPARENT && cnp->cn_flags & ISLASTCN) |
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, |
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VOP_ISLOCKED(dvp))); |
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return error; |
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} |
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/* --------------------------------------------------------------------- */ |
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int |
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tmpfs_create(void *v) |
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{ |
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struct vnode *dvp = ((struct vop_create_args *)v)->a_dvp; |
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struct vnode **vpp = ((struct vop_create_args *)v)->a_vpp; |
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struct componentname *cnp = ((struct vop_create_args *)v)->a_cnp; |
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struct vattr *vap = ((struct vop_create_args *)v)->a_vap; |
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KASSERT(vap->va_type == VREG || vap->va_type == VSOCK); |
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return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); |
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} |
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/* --------------------------------------------------------------------- */ |
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int |
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tmpfs_mknod(void *v) |
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{ |
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struct vnode *dvp = ((struct vop_mknod_args *)v)->a_dvp; |
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struct vnode **vpp = ((struct vop_mknod_args *)v)->a_vpp; |
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struct componentname *cnp = ((struct vop_mknod_args *)v)->a_cnp; |
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struct vattr *vap = ((struct vop_mknod_args *)v)->a_vap; |
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if (vap->va_type != VBLK && vap->va_type != VCHR && |
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vap->va_type != VFIFO) |
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return EINVAL; |
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return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); |
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} |
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/* --------------------------------------------------------------------- */ |
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int |
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tmpfs_open(void *v) |
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{ |
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struct vnode *vp = ((struct vop_open_args *)v)->a_vp; |
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int mode = ((struct vop_open_args *)v)->a_mode; |
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int error; |
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struct tmpfs_node *node; |
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KASSERT(VOP_ISLOCKED(vp)); |
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node = VP_TO_TMPFS_NODE(vp); |
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KASSERT(node->tn_links > 0); |
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/* If the file is marked append-only, deny write requests. */ |
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if (node->tn_flags & APPEND && (mode & (FWRITE | O_APPEND)) == FWRITE) |
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error = EPERM; |
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else |
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error = 0; |
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KASSERT(VOP_ISLOCKED(vp)); |
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return error; |
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} |
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/* --------------------------------------------------------------------- */ |
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int |
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tmpfs_close(void *v) |
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{ |
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struct vnode *vp = ((struct vop_close_args *)v)->a_vp; |
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struct tmpfs_node *node; |
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KASSERT(VOP_ISLOCKED(vp)); |
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node = VP_TO_TMPFS_NODE(vp); |
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if (node->tn_links > 0) { |
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/* Update node times. No need to do it if the node has |
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* been deleted, because it will vanish after we return. */ |
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tmpfs_update(vp, NULL, NULL, UPDATE_CLOSE); |
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} |
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return 0; |
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} |
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/* --------------------------------------------------------------------- */ |
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int |
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tmpfs_access(void *v) |
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{ |
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struct vnode *vp = ((struct vop_access_args *)v)->a_vp; |
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int mode = ((struct vop_access_args *)v)->a_mode; |
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struct ucred *cred = ((struct vop_access_args *)v)->a_cred; |
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int error; |
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struct tmpfs_node *node; |
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KASSERT(VOP_ISLOCKED(vp)); |
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node = VP_TO_TMPFS_NODE(vp); |
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switch (vp->v_type) { |
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case VDIR: |
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/* FALLTHROUGH */ |
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case VLNK: |
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/* FALLTHROUGH */ |
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case VREG: |
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if (mode & VWRITE && vp->v_mount->mnt_flag & MNT_RDONLY) { |
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error = EROFS; |
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goto out; |
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} |
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break; |
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case VBLK: |
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/* FALLTHROUGH */ |
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case VCHR: |
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/* FALLTHROUGH */ |
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case VSOCK: |
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/* FALLTHROUGH */ |
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case VFIFO: |
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break; |
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default: |
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error = EINVAL; |
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goto out; |
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} |
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if (mode & VWRITE && node->tn_flags & IMMUTABLE) { |
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error = EPERM; |
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goto out; |
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} |
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error = vaccess(vp->v_type, node->tn_mode, node->tn_uid, |
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node->tn_gid, mode, cred); |
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out: |
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KASSERT(VOP_ISLOCKED(vp)); |
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return error; |
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} |
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/* --------------------------------------------------------------------- */ |
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int |
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tmpfs_getattr(void *v) |
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{ |
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struct vnode *vp = ((struct vop_getattr_args *)v)->a_vp; |
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struct vattr *vap = ((struct vop_getattr_args *)v)->a_vap; |
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struct tmpfs_node *node; |
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node = VP_TO_TMPFS_NODE(vp); |
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VATTR_NULL(vap); |
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tmpfs_itimes(vp, NULL, NULL); |
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vap->va_type = vp->v_type; |
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vap->va_mode = node->tn_mode; |
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vap->va_nlink = node->tn_links; |
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vap->va_uid = node->tn_uid; |
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vap->va_gid = node->tn_gid; |
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vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; |
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vap->va_fileid = node->tn_id; |
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vap->va_size = node->tn_size; |
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vap->va_blocksize = PAGE_SIZE; |
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vap->va_atime = node->tn_atime; |
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vap->va_mtime = node->tn_mtime; |
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vap->va_ctime = node->tn_ctime; |
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vap->va_birthtime = node->tn_birthtime; |
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vap->va_gen = node->tn_gen; |
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vap->va_flags = node->tn_flags; |
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vap->va_rdev = (vp->v_type == VBLK || vp->v_type == VCHR) ? |
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node->tn_rdev : VNOVAL; |
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vap->va_bytes = round_page(node->tn_size); |
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vap->va_filerev = VNOVAL; |
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vap->va_vaflags = 0; |
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vap->va_spare = VNOVAL; /* XXX */ |
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return 0; |
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} |
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/* --------------------------------------------------------------------- */ |
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/* XXX Should this operation be atomic? I think it should, but code in |
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* XXX other places (e.g., ufs) doesn't seem to be... */ |
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int |
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tmpfs_setattr(void *v) |
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{ |
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struct vnode *vp = ((struct vop_setattr_args *)v)->a_vp; |
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struct vattr *vap = ((struct vop_setattr_args *)v)->a_vap; |
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struct ucred *cred = ((struct vop_setattr_args *)v)->a_cred; |
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struct proc *p = ((struct vop_setattr_args *)v)->a_p; |
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int error; |
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KASSERT(VOP_ISLOCKED(vp)); |
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error = 0; |
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/* Abort if any unsettable attribute is given. */ |
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if (vap->va_type != VNON || |
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vap->va_nlink != VNOVAL || |
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vap->va_fsid != VNOVAL || |
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vap->va_fileid != VNOVAL || |
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vap->va_blocksize != VNOVAL || |
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vap->va_ctime.tv_sec != VNOVAL || |
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vap->va_ctime.tv_nsec != VNOVAL || |
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vap->va_birthtime.tv_sec != VNOVAL || |
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vap->va_birthtime.tv_nsec != VNOVAL || |
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vap->va_gen != VNOVAL || |
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vap->va_rdev != VNOVAL || |
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vap->va_bytes != VNOVAL) |
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error = EINVAL; |
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if (error == 0 && (vap->va_flags != VNOVAL)) |
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error = tmpfs_chflags(vp, vap->va_flags, cred, p); |
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if (error == 0 && (vap->va_size != VNOVAL)) |
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error = tmpfs_chsize(vp, vap->va_size, cred, p); |
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if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) |
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error = tmpfs_chown(vp, vap->va_uid, vap->va_gid, cred, p); |
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if (error == 0 && (vap->va_mode != VNOVAL)) |
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error = tmpfs_chmod(vp, vap->va_mode, cred, p); |
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if (error == 0 && ((vap->va_atime.tv_sec != VNOVAL && |
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vap->va_atime.tv_nsec != VNOVAL) || |
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(vap->va_mtime.tv_sec != VNOVAL && |
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vap->va_mtime.tv_nsec != VNOVAL))) |
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error = tmpfs_chtimes(vp, &vap->va_atime, &vap->va_mtime, |
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vap->va_vaflags, cred, p); |
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|
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/* Update the node times. We give preference to the error codes |
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* generated by this function rather than the ones that may arise |
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* from tmpfs_update. */ |
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tmpfs_update(vp, NULL, NULL, 0); |
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|
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KASSERT(VOP_ISLOCKED(vp)); |
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|
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return error; |
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} |
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|
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/* --------------------------------------------------------------------- */ |
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|
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int |
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tmpfs_read(void *v) |
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{ |
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struct vnode *vp = ((struct vop_read_args *)v)->a_vp; |
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struct uio *uio = ((struct vop_read_args *)v)->a_uio; |
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int error; |
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int flags; |
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struct tmpfs_node *node; |
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struct uvm_object *uobj; |
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|
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KASSERT(VOP_ISLOCKED(vp)); |
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|
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node = VP_TO_TMPFS_NODE(vp); |
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|
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if (vp->v_type != VREG) { |
|
error = EISDIR; |
|
goto out; |
|
} |
|
|
|
if (uio->uio_offset < 0) { |
|
error = EINVAL; |
|
goto out; |
|
} |
|
|
|
node->tn_status |= TMPFS_NODE_ACCESSED; |
|
|
|
uobj = node->tn_aobj; |
|
flags = UBC_WANT_UNMAP(vp) ? UBC_UNMAP : 0; |
|
error = 0; |
|
while (error == 0 && uio->uio_resid > 0) { |
|
vsize_t len; |
|
void *win; |
|
|
|
if (node->tn_size <= uio->uio_offset) |
|
break; |
|
|
|
len = MIN(node->tn_size - uio->uio_offset, uio->uio_resid); |
|
if (len == 0) |
|
break; |
|
|
|
win = ubc_alloc(uobj, uio->uio_offset, &len, UBC_READ); |
|
error = uiomove(win, len, uio); |
|
ubc_release(win, flags); |
|
} |
|
|
|
out: |
|
KASSERT(VOP_ISLOCKED(vp)); |
|
|
|
return error; |
|
} |
|
|
|
/* --------------------------------------------------------------------- */ |
|
|
|
int |
|
tmpfs_write(void *v) |
|
{ |
|
struct vnode *vp = ((struct vop_write_args *)v)->a_vp; |
|
struct uio *uio = ((struct vop_write_args *)v)->a_uio; |
|
int ioflag = ((struct vop_write_args *)v)->a_ioflag; |
|
|
|
boolean_t extended; |
|
int error; |
|
int flags; |
|
off_t oldsize; |
|
struct tmpfs_node *node; |
|
struct uvm_object *uobj; |
|
|
|
KASSERT(VOP_ISLOCKED(vp)); |
|
|
|
node = VP_TO_TMPFS_NODE(vp); |
|
oldsize = node->tn_size; |
|
|
|
if (uio->uio_offset < 0 || vp->v_type != VREG) { |
|
error = EINVAL; |
|
goto out; |
|
} |
|
|
|
if (uio->uio_resid == 0) { |
|
error = 0; |
|
goto out; |
|
} |
|
|
|
if (ioflag & IO_APPEND) |
|
uio->uio_offset = node->tn_size; |
|
|
|
extended = uio->uio_offset + uio->uio_resid > node->tn_size; |
|
if (extended) { |
|
error = tmpfs_reg_resize(vp, uio->uio_offset + uio->uio_resid); |
|
if (error != 0) |
|
goto out; |
|
} |
|
|
|
uobj = node->tn_aobj; |
|
flags = UBC_WANT_UNMAP(vp) ? UBC_UNMAP : 0; |
|
error = 0; |
|
while (error == 0 && uio->uio_resid > 0) { |
|
vsize_t len; |
|
void *win; |
|
|
|
len = MIN(node->tn_size - uio->uio_offset, uio->uio_resid); |
|
if (len == 0) |
|
break; |
|
|
|
win = ubc_alloc(uobj, uio->uio_offset, &len, UBC_WRITE); |
|
error = uiomove(win, len, uio); |
|
ubc_release(win, flags); |
|
} |
|
|
|
node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_MODIFIED | |
|
(extended ? TMPFS_NODE_CHANGED : 0); |
|
|
|
if (error != 0) |
|
(void)tmpfs_reg_resize(vp, oldsize); |
|
|
|
out: |
|
KASSERT(VOP_ISLOCKED(vp)); |
|
KASSERT(IMPLIES(error == 0, uio->uio_resid == 0)); |
|
KASSERT(IMPLIES(error != 0, oldsize == node->tn_size)); |
|
|
|
return error; |
|
} |
|
|
|
/* --------------------------------------------------------------------- */ |
|
|
|
int |
|
tmpfs_fsync(void *v) |
|
{ |
|
struct vnode *vp = ((struct vop_fsync_args *)v)->a_vp; |
|
|
|
KASSERT(VOP_ISLOCKED(vp)); |
|
|
|
tmpfs_update(vp, NULL, NULL, 0); |
|
|
|
return 0; |
|
} |
|
|
|
/* --------------------------------------------------------------------- */ |
|
|
|
int |
|
tmpfs_remove(void *v) |
|
{ |
|
struct vnode *dvp = ((struct vop_remove_args *)v)->a_dvp; |
|
struct vnode *vp = ((struct vop_remove_args *)v)->a_vp; |
|
|
|
int error; |
|
struct tmpfs_dirent *de; |
|
struct tmpfs_mount *tmp; |
|
struct tmpfs_node *dnode; |
|
struct tmpfs_node *node; |
|
|
|
KASSERT(VOP_ISLOCKED(dvp)); |
|
KASSERT(VOP_ISLOCKED(vp)); |
|
|
|
dnode = VP_TO_TMPFS_DIR(dvp); |
|
node = VP_TO_TMPFS_NODE(vp); |
|
tmp = VFS_TO_TMPFS(vp->v_mount); |
|
de = node->tn_lookup_dirent; |
|
KASSERT(de != NULL); |
|
|
|
/* XXX: Why isn't this done by the caller? */ |
|
if (vp->v_type == VDIR) { |
|
error = EISDIR; |
|
goto out; |
|
} |
|
|
|
/* Files marked as immutable or append-only cannot be deleted. */ |
|
if (node->tn_flags & (IMMUTABLE | APPEND)) { |
|
error = EPERM; |
|
goto out; |
|
} |
|
|
|
/* Remove the entry from the directory; as it is a file, we do not |
|
* have to change the number of hard links of the directory. */ |
|
tmpfs_dir_detach(dvp, de); |
|
|
|
/* Notify interested parties about the modification of dvp. |
|
* The removal of vp is notified when it is reclaimed. */ |
|
VN_KNOTE(dvp, NOTE_WRITE); |
|
|
|
/* Free the directory entry we just deleted. Note that the node |
|
* referred by it will not be removed until the vnode is really |
|
* reclaimed. */ |
|
tmpfs_free_dirent(tmp, de, TRUE); |
|
|
|
error = 0; |
|
|
|
out: |
|
vput(dvp); |
|
vput(vp); |
|
|
|
KASSERT(!VOP_ISLOCKED(dvp)); |
|
|
|
return error; |
|
} |
|
|
|
/* --------------------------------------------------------------------- */ |
|
|
|
int |
|
tmpfs_link(void *v) |
|
{ |
|
struct vnode *dvp = ((struct vop_link_args *)v)->a_dvp; |
|
struct vnode *vp = ((struct vop_link_args *)v)->a_vp; |
|
struct componentname *cnp = ((struct vop_link_args *)v)->a_cnp; |
|
|
|
int error; |
|
struct tmpfs_dirent *de; |
|
struct tmpfs_node *dnode; |
|
struct tmpfs_node *node; |
|
|
|
KASSERT(VOP_ISLOCKED(dvp)); |
|
KASSERT(!VOP_ISLOCKED(vp)); |
|
KASSERT(cnp->cn_flags & HASBUF); |
|
KASSERT(dvp != vp); /* XXX When can this be false? */ |
|
|
|
dnode = VP_TO_TMPFS_DIR(dvp); |
|
node = VP_TO_TMPFS_NODE(vp); |
|
|
|
/* Lock vp because we will need to run tmpfs_update over it, which |
|
* needs the vnode to be locked. */ |
|
error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); |
|
if (error != 0) |
|
goto out; |
|
|
|
/* XXX: Why aren't the following two tests done by the caller? */ |
|
|
|
/* Hard links of directories are forbidden. */ |
|
if (vp->v_type == VDIR) { |
|
error = EPERM; |
|
goto out; |
|
} |
|
|
|
/* Cannot create cross-device links. */ |
|
if (dvp->v_mount != vp->v_mount) { |
|
error = EXDEV; |
|
goto out; |
|
} |
|
|
|
/* Ensure that we do not overflow the maximum number of links imposed |
|
* by the system. */ |
|
KASSERT(node->tn_links <= LINK_MAX); |
|
if (node->tn_links == LINK_MAX) { |
|
error = EMLINK; |
|
goto out; |
|
} |
|
|
|
/* We cannot create links of files marked immutable or append-only. */ |
|
if (node->tn_flags & (IMMUTABLE | APPEND)) { |
|
error = EPERM; |
|
goto out; |
|
} |
|
|
|
/* Allocate a new directory entry to represent the node. */ |
|
error = tmpfs_alloc_dirent(VFS_TO_TMPFS(vp->v_mount), node, |
|
cnp->cn_nameptr, cnp->cn_namelen, &de); |
|
if (error != 0) |
|
goto out; |
|
|
|
/* Insert the new directory entry into the appropriate directory. */ |
|
tmpfs_dir_attach(dvp, de); |
|
VN_KNOTE(dvp, NOTE_WRITE); |
|
|
|
/* vp link count has changed, so update node times. */ |
|
node->tn_status |= TMPFS_NODE_CHANGED; |
|
tmpfs_update(vp, NULL, NULL, 0); |
|
|
|
error = 0; |
|
|
|
out: |
|
if (VOP_ISLOCKED(vp)) |
|
VOP_UNLOCK(vp, 0); |
|
|
|
PNBUF_PUT(cnp->cn_pnbuf); |
|
|
|
vput(dvp); |
|
|
|
/* XXX Locking status of dvp does not match manual page. */ |
|
KASSERT(!VOP_ISLOCKED(dvp)); |
|
KASSERT(!VOP_ISLOCKED(vp)); |
|
|
|
return error; |
|
} |
|
|
|
/* --------------------------------------------------------------------- */ |
|
|
|
int |
|
tmpfs_rename(void *v) |
|
{ |
|
struct vnode *fdvp = ((struct vop_rename_args *)v)->a_fdvp; |
|
struct vnode *fvp = ((struct vop_rename_args *)v)->a_fvp; |
|
struct componentname *fcnp = ((struct vop_rename_args *)v)->a_fcnp; |
|
struct vnode *tdvp = ((struct vop_rename_args *)v)->a_tdvp; |
|
struct vnode *tvp = ((struct vop_rename_args *)v)->a_tvp; |
|
struct componentname *tcnp = ((struct vop_rename_args *)v)->a_tcnp; |
|
|
|
char *newname; |
|
int error; |
|
struct tmpfs_dirent *de; |
|
struct tmpfs_mount *tmp; |
|
struct tmpfs_node *fdnode; |
|
struct tmpfs_node *fnode; |
|
struct tmpfs_node *tdnode; |
|
|
|
KASSERT(VOP_ISLOCKED(tdvp)); |
|
KASSERT(IMPLIES(tvp != NULL, VOP_ISLOCKED(tvp))); |
|
KASSERT(fcnp->cn_flags & HASBUF); |
|
KASSERT(tcnp->cn_flags & HASBUF); |
|
|
|
fdnode = VP_TO_TMPFS_DIR(fdvp); |
|
fnode = VP_TO_TMPFS_NODE(fvp); |
|
de = fnode->tn_lookup_dirent; |
|
|
|
/* Disallow cross-device renames. |
|
* XXX Why isn't this done by the caller? */ |
|
if (fvp->v_mount != tdvp->v_mount || |
|
(tvp != NULL && fvp->v_mount != tvp->v_mount)) { |
|
error = EXDEV; |
|
goto out; |
|
} |
|
|
|
tmp = VFS_TO_TMPFS(tdvp->v_mount); |
|
tdnode = VP_TO_TMPFS_DIR(tdvp); |
|
|
|
/* If source and target are the same file, there is nothing to do. */ |
|
if (fvp == tvp) { |
|
error = 0; |
|
goto out; |
|
} |
|
|
|
/* Avoid manipulating '.' and '..' entries. */ |
|
if (de == NULL) { |
|
KASSERT(fvp->v_type == VDIR); |
|
error = EINVAL; |
|
goto out; |
|
} |
|
KASSERT(de->td_node == fnode); |
|
|
|
/* If we need to move the directory between entries, lock the |
|
* source so that we can safely operate on it. */ |
|
if (fdnode != tdnode) { |
|
error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); |
|
if (error != 0) |
|
goto out; |
|
} |
|
|
|
/* Ensure that we have enough memory to hold the new name, if it |
|
* has to be changed. */ |
|
if (fcnp->cn_namelen != tcnp->cn_namelen || |
|
memcmp(fcnp->cn_nameptr, tcnp->cn_nameptr, fcnp->cn_namelen) != 0) { |
|
newname = tmpfs_str_pool_get(&tmp->tm_str_pool, |
|
tcnp->cn_namelen, 0); |
|
if (newname == NULL) { |
|
error = ENOSPC; |
|
goto out_locked; |
|
} |
|
} else |
|
newname = NULL; |
|
|
|
/* If the node is being moved to another directory, we have to do |
|
* the move. */ |
|
if (fdnode != tdnode) { |
|
/* In case we are moving a directory, we have to adjust its |
|
* parent to point to the new parent. */ |
|
if (de->td_node->tn_type == VDIR) { |
|
struct tmpfs_node *n; |
|
|
|
/* Ensure the target directory is not a child of the |
|
* directory being moved. Otherwise, we'd end up |
|
* with stale nodes. */ |
|
n = tdnode; |
|
while (n != n->tn_parent) { |
|
if (n == fnode) { |
|
error = EINVAL; |
|
goto out_locked; |
|
} |
|
n = n->tn_parent; |
|
} |
|
|
|
/* Adjust the parent pointer. */ |
|
TMPFS_VALIDATE_DIR(fnode); |
|
de->td_node->tn_parent = tdnode; |
|
|
|
/* As a result of changing the target of the '..' |
|
* entry, the link count of the source and target |
|
* directories has to be adjusted. */ |
|
fdnode->tn_links--; |
|
tdnode->tn_links++; |
|
} |
|
|
|
/* Do the move: just remove the entry from the source directory |
|
* and insert it into the target one. */ |
|
tmpfs_dir_detach(fdvp, de); |
|
tmpfs_dir_attach(tdvp, de); |
|
|
|
/* Notify listeners of fdvp about the change in the directory. |
|
* We can do it at this point because we aren't touching fdvp |
|
* any more below. */ |
|
VN_KNOTE(fdvp, NOTE_WRITE); |
|
} |
|
|
|
/* If the name has changed, we need to make it effective by changing |
|
* it in the directory entry. */ |
|
if (newname != NULL) { |
|
KASSERT(tcnp->cn_namelen < MAXNAMLEN); |
|
KASSERT(tcnp->cn_namelen < 0xffff); |
|
|
|
tmpfs_str_pool_put(&tmp->tm_str_pool, de->td_name, |
|
de->td_namelen); |
|
de->td_namelen = (uint16_t)tcnp->cn_namelen; |
|
memcpy(newname, tcnp->cn_nameptr, tcnp->cn_namelen); |
|
de->td_name = newname; |
|
|
|
fnode->tn_status |= TMPFS_NODE_MODIFIED; |
|
} |
|
|
|
/* If we are overwriting an entry, we have to remove the old one |
|
* from the target directory. */ |
|
if (tvp != NULL) { |
|
struct tmpfs_node *tnode; |
|
|
|
tnode = VP_TO_TMPFS_NODE(tvp); |
|
|
|
/* The source node cannot be a directory in this case. */ |
|
KASSERT(fnode->tn_type != VDIR); |
|
|
|
/* Remove the old entry from the target directory. */ |
|
de = tnode->tn_lookup_dirent; |
|
tmpfs_dir_detach(tdvp, de); |
|
|
|
/* Free the directory entry we just deleted. Note that the |
|
* node referred by it will not be removed until the vnode is |
|
* really reclaimed. */ |
|
tmpfs_free_dirent(VFS_TO_TMPFS(tvp->v_mount), de, TRUE); |
|
} |
|
|
|
/* Notify listeners of tdvp about the change in the directory (either |
|
* because a new entry was added or because one was removed). */ |
|
VN_KNOTE(tdvp, NOTE_WRITE); |
|
|
|
error = 0; |
|
|
|
out_locked: |
|
if (fdnode != tdnode) |
|
VOP_UNLOCK(fdvp, 0); |
|
|
|
out: |
|
/* Release target nodes. */ |
|
/* XXX: I don't understand when tdvp can be the same as tvp, but |
|
* other code takes care of this... */ |
|
if (tdvp == tvp) |
|
vrele(tdvp); |
|
else |
|
vput(tdvp); |
|
if (tvp != NULL) |
|
vput(tvp); |
|
|
|
/* Release source nodes. */ |
|
vrele(fdvp); |
|
vrele(fvp); |
|
|
|
return error; |
|
} |
|
|
|
/* --------------------------------------------------------------------- */ |
|
|
|
int |
|
tmpfs_mkdir(void *v) |
|
{ |
|
struct vnode *dvp = ((struct vop_mkdir_args *)v)->a_dvp; |
|
struct vnode **vpp = ((struct vop_mkdir_args *)v)->a_vpp; |
|
struct componentname *cnp = ((struct vop_mkdir_args *)v)->a_cnp; |
|
struct vattr *vap = ((struct vop_mkdir_args *)v)->a_vap; |
|
|
|
KASSERT(vap->va_type == VDIR); |
|
|
|
return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); |
|
} |
|
|
|
/* --------------------------------------------------------------------- */ |
|
|
|
int |
|
tmpfs_rmdir(void *v) |
|
{ |
|
struct vnode *dvp = ((struct vop_rmdir_args *)v)->a_dvp; |
|
struct vnode *vp = ((struct vop_rmdir_args *)v)->a_vp; |
|
|
|
int error; |
|
struct tmpfs_dirent *de; |
|
struct tmpfs_mount *tmp; |
|
struct tmpfs_node *dnode; |
|
struct tmpfs_node *node; |
|
|
|
KASSERT(VOP_ISLOCKED(dvp)); |
|
KASSERT(VOP_ISLOCKED(vp)); |
|
|
|
tmp = VFS_TO_TMPFS(dvp->v_mount); |
|
dnode = VP_TO_TMPFS_DIR(dvp); |
|
node = VP_TO_TMPFS_DIR(vp); |
|
KASSERT(node->tn_parent == dnode); |
|
|
|
/* Get the directory entry associated with node (vp). This was |
|
* filled by tmpfs_lookup while looking up the entry. */ |
|
de = node->tn_lookup_dirent; |
|
KASSERT(TMPFS_DIRENT_MATCHES(de, |
|
((struct vop_rmdir_args *)v)->a_cnp->cn_nameptr, |
|
((struct vop_rmdir_args *)v)->a_cnp->cn_namelen)); |
|
|
|
/* Directories with more than two entries ('.' and '..') cannot be |
|
* removed. */ |
|
if (node->tn_size > 0) { |
|
error = ENOTEMPTY; |
|
goto out; |
|
} |
|
|
|
/* Check flags to see if we are allowed to remove the directory. */ |
|
if (dnode->tn_flags & APPEND || node->tn_flags & (IMMUTABLE | APPEND)) { |
|
error = EPERM; |
|
goto out; |
|
} |
|
|
|
/* Detach the directory entry from the directory (dnode). */ |
|
tmpfs_dir_detach(dvp, de); |
|
|
|
node->tn_links--; |
|
node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | \ |
|
TMPFS_NODE_MODIFIED; |
|
node->tn_parent->tn_links--; |
|
node->tn_parent->tn_status |= TMPFS_NODE_ACCESSED | \ |
|
TMPFS_NODE_CHANGED | TMPFS_NODE_MODIFIED; |
|
|
|
/* Notify modification of parent directory and release it. */ |
|
VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); |
|
cache_purge(dvp); /* XXX Is this needed? */ |
|
vput(dvp); |
|
|
|
/* Free the directory entry we just deleted. Note that the node |
|
* referred by it will not be removed until the vnode is really |
|
* reclaimed. */ |
|
tmpfs_free_dirent(tmp, de, TRUE); |
|
|
|
/* Release the deleted vnode (will destroy the node, notify |
|
* interested parties and clean it from the cache). */ |
|
vput(vp); |
|
|
|
error = 0; |
|
|
|
out: |
|
if (error != 0) { |
|
vput(dvp); |
|
vput(vp); |
|
} |
|
|
|
return error; |
|
} |
|
|
|
/* --------------------------------------------------------------------- */ |
|
|
|
int |
|
tmpfs_symlink(void *v) |
|
{ |
|
struct vnode *dvp = ((struct vop_symlink_args *)v)->a_dvp; |
|
struct vnode **vpp = ((struct vop_symlink_args *)v)->a_vpp; |
|
struct componentname *cnp = ((struct vop_symlink_args *)v)->a_cnp; |
|
struct vattr *vap = ((struct vop_symlink_args *)v)->a_vap; |
|
char *target = ((struct vop_symlink_args *)v)->a_target; |
|
|
|
KASSERT(vap->va_type == VLNK); |
|
|
|
return tmpfs_alloc_file(dvp, vpp, vap, cnp, target); |
|
} |
|
|
|
/* --------------------------------------------------------------------- */ |
|
|
|
int |
|
tmpfs_readdir(void *v) |
|
{ |
|
struct vnode *vp = ((struct vop_readdir_args *)v)->a_vp; |
|
struct uio *uio = ((struct vop_readdir_args *)v)->a_uio; |
|
int *eofflag = ((struct vop_readdir_args *)v)->a_eofflag; |
|
off_t **cookies = ((struct vop_readdir_args *)v)->a_cookies; |
|
int *ncookies = ((struct vop_readdir_args *)v)->a_ncookies; |
|
|
|
int error; |
|
off_t startoff; |
|
off_t cnt; |
|
struct tmpfs_node *node; |
|
|
|
KASSERT(VOP_ISLOCKED(vp)); |
|
|
|
/* This operation only makes sense on directory nodes. */ |
|
if (vp->v_type != VDIR) { |
|
error = ENOTDIR; |
|
goto out; |
|
} |
|
|
|
node = VP_TO_TMPFS_DIR(vp); |
|
|
|
startoff = uio->uio_offset; |
|
|
|
cnt = 0; |
|
if (uio->uio_offset == TMPFS_DIRCOOKIE_DOT) { |
|
error = tmpfs_dir_getdotdent(node, uio); |
|
if (error == -1) { |
|
error = 0; |
|
goto outok; |
|
} else if (error != 0) |
|
goto outok; |
|
cnt++; |
|
} |
|
|
|
if (uio->uio_offset == TMPFS_DIRCOOKIE_DOTDOT) { |
|
error = tmpfs_dir_getdotdotdent(node, uio); |
|
if (error == -1) { |
|
error = 0; |
|
goto outok; |
|
} else if (error != 0) |
|
goto outok; |
|
cnt++; |
|
} |
|
|
|
error = tmpfs_dir_getdents(node, uio, &cnt); |
|
if (error == -1) |
|
error = 0; |
|
KASSERT(error >= 0); |
|
|
|
outok: |
|
/* This label assumes that startoff has been |
|
* initialized. If the compiler didn't spit out warnings, we'd |
|
* simply make this one be 'out' and drop 'outok'. */ |
|
|
|
if (eofflag != NULL) |
|
*eofflag = |
|
(error == 0 && uio->uio_offset == TMPFS_DIRCOOKIE_EOF); |
|
|
|
/* Update NFS-related variables. */ |
|
if (error == 0 && cookies != NULL && ncookies != NULL) { |
|
off_t i; |
|
off_t off = startoff; |
|
struct tmpfs_dirent *de = NULL; |
|
|
|
*ncookies = cnt; |
|
*cookies = malloc(cnt * sizeof(off_t), M_TEMP, M_WAITOK); |
|
|
|
for (i = 0; i < cnt; i++) { |
|
KASSERT(off != TMPFS_DIRCOOKIE_EOF); |
|
if (off == TMPFS_DIRCOOKIE_DOT) { |
|
off = TMPFS_DIRCOOKIE_DOTDOT; |
|
} else { |
|
if (off == TMPFS_DIRCOOKIE_DOTDOT) { |
|
de = TAILQ_FIRST(&node->tn_dir); |
|
} else if (de != NULL) { |
|
de = TAILQ_NEXT(de, td_entries); |
|
} else { |
|
de = tmpfs_dir_lookupbycookie(node, |
|
off); |
|
KASSERT(de != NULL); |
|
de = TAILQ_NEXT(de, td_entries); |
|
} |
|
if (de == NULL) { |
|
off = TMPFS_DIRCOOKIE_EOF; |
|
} else { |
|
off = TMPFS_DIRCOOKIE(de); |
|
} |
|
} |
|
|
|
(*cookies)[i] = off; |
|
} |
|
KASSERT(uio->uio_offset == off); |
|
} |
|
|
|
out: |
|
KASSERT(VOP_ISLOCKED(vp)); |
|
|
|
return error; |
|
} |
|
|
|
/* --------------------------------------------------------------------- */ |
|
|
|
int |
|
tmpfs_readlink(void *v) |
|
{ |
|
struct vnode *vp = ((struct vop_readlink_args *)v)->a_vp; |
|
struct uio *uio = ((struct vop_readlink_args *)v)->a_uio; |
|
|
|
int error; |
|
struct tmpfs_node *node; |
|
|
|
KASSERT(VOP_ISLOCKED(vp)); |
|
KASSERT(uio->uio_offset == 0); |
|
KASSERT(vp->v_type == VLNK); |
|
|
|
node = VP_TO_TMPFS_NODE(vp); |
|
|
|
error = uiomove(node->tn_link, MIN(node->tn_size, uio->uio_resid), |
|
uio); |
|
node->tn_status |= TMPFS_NODE_ACCESSED; |
|
|
|
KASSERT(VOP_ISLOCKED(vp)); |
|
|
|
return error; |
|
} |
|
|
|
/* --------------------------------------------------------------------- */ |
|
|
|
int |
|
tmpfs_inactive(void *v) |
|
{ |
|
struct vnode *vp = ((struct vop_inactive_args *)v)->a_vp; |
|
struct proc *p = ((struct vop_inactive_args *)v)->a_p; |
|
|
|
struct tmpfs_node *node; |
|
|
|
KASSERT(VOP_ISLOCKED(vp)); |
|
|
|
node = VP_TO_TMPFS_NODE(vp); |
|
|
|
VOP_UNLOCK(vp, 0); |
|
|
|
if (node->tn_links == 0) |
|
vrecycle(vp, NULL, p); |
|
|
|
return 0; |
|
} |
|
|
|
/* --------------------------------------------------------------------- */ |
|
|
|
int |
|
tmpfs_reclaim(void *v) |
|
{ |
|
struct vnode *vp = ((struct vop_reclaim_args *)v)->a_vp; |
|
|
|
struct tmpfs_mount *tmp; |
|
struct tmpfs_node *node; |
|
|
|
KASSERT(!VOP_ISLOCKED(vp)); |
|
|
|
node = VP_TO_TMPFS_NODE(vp); |
|
tmp = VFS_TO_TMPFS(vp->v_mount); |
|
|
|
if (node->tn_links == 0) |
|
VN_KNOTE(vp, NOTE_DELETE); |
|
|
|
cache_purge(vp); |
|
tmpfs_free_vp(vp); |
|
|
|
/* If the node referenced by this vnode was deleted by the user, |
|
* we must free its associated data structures (now that the vnode |
|
* is being reclaimed). */ |
|
if (node->tn_links == 0) |
|
tmpfs_free_node(tmp, node); |
|
|
|
KASSERT(!VOP_ISLOCKED(vp)); |
|
KASSERT(vp->v_data == NULL); |
|
|
|
return 0; |
|
} |
|
|
|
/* --------------------------------------------------------------------- */ |
|
|
|
int |
|
tmpfs_print(void *v) |
|
{ |
|
struct vnode *vp = ((struct vop_print_args *)v)->a_vp; |
|
|
|
struct tmpfs_node *node; |
|
|
|
node = VP_TO_TMPFS_NODE(vp); |
|
|
|
printf("tag VT_TMPFS, tmpfs_node %p, flags 0x%x, links %d\n", |
|
node, node->tn_flags, node->tn_links); |
|
printf("\tmode 0%o, owner %d, group %d, size %" PRIdMAX |
|
", status 0x%x\n", |
|
node->tn_mode, node->tn_uid, node->tn_gid, |
|
(uintmax_t)node->tn_size, node->tn_status); |
|
|
|
if (vp->v_type == VFIFO) |
|
fifo_printinfo(vp); |
|
lockmgr_printinfo(&vp->v_lock); |
|
|
|
printf("\n"); |
|
|
|
return 0; |
|
} |
|
|
|
/* --------------------------------------------------------------------- */ |
|
|
|
int |
|
tmpfs_pathconf(void *v) |
|
{ |
|
int name = ((struct vop_pathconf_args *)v)->a_name; |
|
register_t *retval = ((struct vop_pathconf_args *)v)->a_retval; |
|
|
|
int error; |
|
|
|
error = 0; |
|
|
|
switch (name) { |
|
case _PC_LINK_MAX: |
|
*retval = LINK_MAX; |
|
break; |
|
|
|
case _PC_NAME_MAX: |
|
*retval = NAME_MAX; |
|
break; |
|
|
|
case _PC_PATH_MAX: |
|
*retval = PATH_MAX; |
|
break; |
|
|
|
case _PC_PIPE_BUF: |
|
*retval = PIPE_BUF; |
|
break; |
|
|
|
case _PC_CHOWN_RESTRICTED: |
|
*retval = 1; |
|
break; |
|
|
|
case _PC_NO_TRUNC: |
|
*retval = 1; |
|
break; |
|
|
|
case _PC_SYNC_IO: |
|
*retval = 1; |
|
break; |
|
|
|
case _PC_FILESIZEBITS: |
|
*retval = 0; /* XXX Don't know which value should I return. */ |
|
break; |
|
|
|
default: |
|
error = EINVAL; |
|
} |
|
|
|
return error; |
|
} |
|
|
|
/* --------------------------------------------------------------------- */ |
|
|
|
int |
|
tmpfs_advlock(void *v) |
|
{ |
|
struct vnode *vp = ((struct vop_advlock_args *)v)->a_vp; |
|
|
|
struct tmpfs_node *node; |
|
|
|
node = VP_TO_TMPFS_NODE(vp); |
|
|
|
return lf_advlock(v, &node->tn_lockf, node->tn_size); |
|
} |
|
|
|
/* --------------------------------------------------------------------- */ |
|
|
|
int |
|
tmpfs_getpages(void *v) |
|
{ |
|
struct vnode *vp = ((struct vop_getpages_args *)v)->a_vp; |
|
voff_t offset = ((struct vop_getpages_args *)v)->a_offset; |
|
struct vm_page **m = ((struct vop_getpages_args *)v)->a_m; |
|
int *count = ((struct vop_getpages_args *)v)->a_count; |
|
int centeridx = ((struct vop_getpages_args *)v)->a_centeridx; |
|
vm_prot_t access_type = ((struct vop_getpages_args *)v)->a_access_type; |
|
int advice = ((struct vop_getpages_args *)v)->a_advice; |
|
int flags = ((struct vop_getpages_args *)v)->a_flags; |
|
|
|
int error; |
|
struct tmpfs_node *node; |
|
struct uvm_object *uobj; |
|
int npages = *count; |
|
|
|
KASSERT(vp->v_type == VREG); |
|
LOCK_ASSERT(simple_lock_held(&vp->v_interlock)); |
|
|
|
node = VP_TO_TMPFS_NODE(vp); |
|
uobj = node->tn_aobj; |
|
|
|
/* We currently don't rely on PGO_PASTEOF. */ |
|
|
|
if (vp->v_size <= offset + (centeridx << PAGE_SHIFT)) { |
|
if ((flags & PGO_LOCKED) == 0) |
|
simple_unlock(&vp->v_interlock); |
|
return EINVAL; |
|
} |
|
|
|
if (vp->v_size < offset + (npages << PAGE_SHIFT)) { |
|
npages = (round_page(vp->v_size) - offset) >> PAGE_SHIFT; |
|
} |
|
|
|
if ((flags & PGO_LOCKED) != 0) |
|
return EBUSY; |
|
|
|
if ((flags & PGO_NOTIMESTAMP) == 0) { |
|
if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) |
|
node->tn_status |= TMPFS_NODE_ACCESSED; |
|
|
|
if ((access_type & VM_PROT_WRITE) != 0) |
|
node->tn_status |= TMPFS_NODE_MODIFIED; |
|
} |
|
|
|
simple_unlock(&vp->v_interlock); |
|
|
|
simple_lock(&uobj->vmobjlock); |
|
error = (*uobj->pgops->pgo_get)(uobj, offset, m, &npages, centeridx, |
|
access_type, advice, flags); |
|
|
|
return error; |
|
} |
|
|
|
/* --------------------------------------------------------------------- */ |
|
|
|
int |
|
tmpfs_putpages(void *v) |
|
{ |
|
struct vnode *vp = ((struct vop_putpages_args *)v)->a_vp; |
|
voff_t offlo = ((struct vop_putpages_args *)v)->a_offlo; |
|
voff_t offhi = ((struct vop_putpages_args *)v)->a_offhi; |
|
int flags = ((struct vop_putpages_args *)v)->a_flags; |
|
|
|
int error; |
|
struct tmpfs_node *node; |
|
struct uvm_object *uobj; |
|
|
|
LOCK_ASSERT(simple_lock_held(&vp->v_interlock)); |
|
|
|
node = VP_TO_TMPFS_NODE(vp); |
|
|
|
if (vp->v_type != VREG) { |
|
simple_unlock(&vp->v_interlock); |
|
return 0; |
|
} |
|
|
|
uobj = node->tn_aobj; |
|
simple_unlock(&vp->v_interlock); |
|
|
|
simple_lock(&uobj->vmobjlock); |
|
error = (*uobj->pgops->pgo_put)(uobj, offlo, offhi, flags); |
|
|
|
/* XXX mtime */ |
|
|
|
return error; |
|
} |