minix/sys/ufs/chfs/chfs_vnode.c
Lionel Sambuc 84d9c625bf Synchronize on NetBSD-CVS (2013/12/1 12:00:00 UTC)
- Fix for possible unset uid/gid in toproto
 - Fix for default mtree style
 - Update libelf
 - Importing libexecinfo
 - Resynchronize GCC, mpc, gmp, mpfr
 - build.sh: Replace params with show-params.
     This has been done as the make target has been renamed in the same
     way, while a new target named params has been added. This new
     target generates a file containing all the parameters, instead of
     printing it on the console.
 - Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
     get getservbyport() out of the inner loop

Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
2014-07-28 17:05:06 +02:00

413 lines
11 KiB
C

/* $NetBSD: chfs_vnode.c,v 1.8 2012/10/19 12:44:39 ttoth Exp $ */
/*-
* Copyright (c) 2010 Department of Software Engineering,
* University of Szeged, Hungary
* Copyright (C) 2010 Tamas Toth <ttoth@inf.u-szeged.hu>
* Copyright (C) 2010 Adam Hoka <ahoka@NetBSD.org>
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by the Department of Software Engineering, University of Szeged, Hungary
*
* 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 ``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 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 "chfs.h"
#include "chfs_inode.h"
#include <sys/malloc.h>
#include <sys/kauth.h>
#include <sys/namei.h>
#include <sys/uio.h>
#include <sys/buf.h>
#include <miscfs/genfs/genfs.h>
/* chfs_vnode_lookup - lookup for a vnode */
struct vnode *
chfs_vnode_lookup(struct chfs_mount *chmp, ino_t vno)
{
struct vnode *vp;
struct chfs_inode *ip;
TAILQ_FOREACH(vp, &chmp->chm_fsmp->mnt_vnodelist, v_mntvnodes) {
ip = VTOI(vp);
if (ip && ip->ino == vno)
return vp;
}
return NULL;
}
/* chfs_readvnode - reads a vnode from the flash and setups its inode */
int
chfs_readvnode(struct mount *mp, ino_t ino, struct vnode **vpp)
{
struct ufsmount* ump = VFSTOUFS(mp);
struct chfs_mount *chmp = ump->um_chfs;
struct chfs_vnode_cache *chvc;
struct chfs_flash_vnode *chfvn;
struct chfs_inode *ip;
int err;
char* buf;
size_t retlen, len;
struct vnode* vp = NULL;
dbg("readvnode | ino: %llu\n", (unsigned long long)ino);
len = sizeof(struct chfs_flash_vnode);
KASSERT(vpp != NULL);
if (vpp != NULL) {
vp = *vpp;
}
ip = VTOI(vp);
chvc = ip->chvc;
/* root node is in-memory only */
if (chvc && ino != CHFS_ROOTINO) {
dbg("offset: %" PRIu32 ", lnr: %d\n",
CHFS_GET_OFS(chvc->v->nref_offset), chvc->v->nref_lnr);
KASSERT((void *)chvc != (void *)chvc->v);
/* reading */
buf = kmem_alloc(len, KM_SLEEP);
err = chfs_read_leb(chmp, chvc->v->nref_lnr, buf,
CHFS_GET_OFS(chvc->v->nref_offset), len, &retlen);
if (err)
return err;
if (retlen != len) {
chfs_err("Error reading vnode: read: %zu insted of: %zu\n",
len, retlen);
return EIO;
}
chfvn = (struct chfs_flash_vnode*)buf;
/* setup inode fields */
chfs_set_vnode_size(vp, chfvn->dn_size);
ip->mode = chfvn->mode;
ip->ch_type = IFTOCHT(ip->mode);
vp->v_type = CHTTOVT(ip->ch_type);
ip->version = chfvn->version;
ip->uid = chfvn->uid;
ip->gid = chfvn->gid;
ip->atime = chfvn->atime;
ip->mtime = chfvn->mtime;
ip->ctime = chfvn->ctime;
kmem_free(buf, len);
}
*vpp = vp;
return 0;
}
/*
* chfs_readddirent -
* reads a directory entry from flash and adds it to its inode
*/
int
chfs_readdirent(struct mount *mp, struct chfs_node_ref *chnr, struct chfs_inode *pdir)
{
struct ufsmount *ump = VFSTOUFS(mp);
struct chfs_mount *chmp = ump->um_chfs;
struct chfs_flash_dirent_node chfdn;
struct chfs_dirent *fd;
size_t len = sizeof(struct chfs_flash_dirent_node);
size_t retlen;
int err = 0;
/* read flash_dirent_node */
err = chfs_read_leb(chmp, chnr->nref_lnr, (char *)&chfdn,
CHFS_GET_OFS(chnr->nref_offset), len, &retlen);
if (err) {
return err;
}
if (retlen != len) {
chfs_err("Error reading vnode: read: %zu insted of: %zu\n",
retlen, len);
return EIO;
}
/* set fields of dirent */
fd = chfs_alloc_dirent(chfdn.nsize + 1);
fd->version = chfdn.version;
fd->vno = chfdn.vno;
fd->type = chfdn.dtype;
fd->nsize = chfdn.nsize;
/* read the name of the dirent */
err = chfs_read_leb(chmp, chnr->nref_lnr, fd->name,
CHFS_GET_OFS(chnr->nref_offset) + len, chfdn.nsize, &retlen);
if (err) {
return err;
}
if (retlen != chfdn.nsize) {
chfs_err("Error reading vnode: read: %zu insted of: %zu\n",
len, retlen);
return EIO;
}
fd->name[fd->nsize] = 0;
fd->nref = chnr;
/* add to inode */
chfs_add_fd_to_inode(chmp, pdir, fd);
return 0;
}
/* chfs_makeinode - makes a new file and initializes its structures */
int
chfs_makeinode(int mode, struct vnode *dvp, struct vnode **vpp,
struct componentname *cnp, enum vtype type)
{
struct chfs_inode *ip, *pdir;
struct vnode *vp;
struct ufsmount* ump = VFSTOUFS(dvp->v_mount);
struct chfs_mount* chmp = ump->um_chfs;
struct chfs_vnode_cache* chvc;
int error;
ino_t vno;
struct chfs_dirent *nfd;
dbg("makeinode\n");
pdir = VTOI(dvp);
*vpp = NULL;
/* number of vnode will be the new maximum */
vno = ++(chmp->chm_max_vno);
error = VFS_VGET(dvp->v_mount, vno, &vp);
if (error)
return (error);
/* setup vnode cache */
mutex_enter(&chmp->chm_lock_vnocache);
chvc = chfs_vnode_cache_get(chmp, vno);
chvc->pvno = pdir->ino;
chvc->vno_version = kmem_alloc(sizeof(uint64_t), KM_SLEEP);
*(chvc->vno_version) = 1;
if (type != VDIR)
chvc->nlink = 1;
else
chvc->nlink = 2;
chvc->state = VNO_STATE_CHECKEDABSENT;
mutex_exit(&chmp->chm_lock_vnocache);
/* setup inode */
ip = VTOI(vp);
ip->ino = vno;
if (type == VDIR)
chfs_set_vnode_size(vp, 512);
else
chfs_set_vnode_size(vp, 0);
ip->uid = kauth_cred_geteuid(cnp->cn_cred);
ip->gid = kauth_cred_getegid(cnp->cn_cred);
ip->version = 1;
ip->iflag |= (IN_ACCESS | IN_CHANGE | IN_UPDATE);
ip->chvc = chvc;
ip->target = NULL;
ip->mode = mode;
vp->v_type = type; /* Rest init'd in getnewvnode(). */
ip->ch_type = VTTOCHT(vp->v_type);
/* authorize setting SGID if needed */
if (ip->mode & ISGID) {
error = kauth_authorize_vnode(cnp->cn_cred, KAUTH_VNODE_WRITE_SECURITY,
vp, NULL, genfs_can_chmod(vp->v_type, cnp->cn_cred, ip->uid,
ip->gid, mode));
if (error)
ip->mode &= ~ISGID;
}
/* write vnode information to the flash */
chfs_update(vp, NULL, NULL, UPDATE_WAIT);
mutex_enter(&chmp->chm_lock_mountfields);
error = chfs_write_flash_vnode(chmp, ip, ALLOC_NORMAL);
if (error) {
mutex_exit(&chmp->chm_lock_mountfields);
vput(vp);
vput(dvp);
return error;
}
/* update parent's vnode information and write it to the flash */
pdir->iflag |= (IN_ACCESS | IN_CHANGE | IN_MODIFY | IN_UPDATE);
chfs_update(dvp, NULL, NULL, UPDATE_WAIT);
error = chfs_write_flash_vnode(chmp, pdir, ALLOC_NORMAL);
if (error) {
mutex_exit(&chmp->chm_lock_mountfields);
vput(vp);
vput(dvp);
return error;
}
vput(dvp);
/* setup directory entry */
nfd = chfs_alloc_dirent(cnp->cn_namelen + 1);
nfd->vno = ip->ino;
nfd->version = (++pdir->chvc->highest_version);
nfd->type = ip->ch_type;
nfd->nsize = cnp->cn_namelen;
memcpy(&(nfd->name), cnp->cn_nameptr, cnp->cn_namelen);
nfd->name[nfd->nsize] = 0;
nfd->nhash = hash32_buf(nfd->name, cnp->cn_namelen, HASH32_BUF_INIT);
/* write out */
error = chfs_write_flash_dirent(chmp, pdir, ip, nfd, ip->ino, ALLOC_NORMAL);
if (error) {
mutex_exit(&chmp->chm_lock_mountfields);
vput(vp);
return error;
}
//TODO set parent's dir times
/* add dirent to parent */
chfs_add_fd_to_inode(chmp, pdir, nfd);
pdir->chvc->nlink++;
mutex_exit(&chmp->chm_lock_mountfields);
*vpp = vp;
return (0);
}
/* chfs_set_vnode_size - updates size of vnode and also inode */
void
chfs_set_vnode_size(struct vnode *vp, size_t size)
{
struct chfs_inode *ip;
KASSERT(vp != NULL);
ip = VTOI(vp);
KASSERT(ip != NULL);
ip->size = size;
vp->v_size = vp->v_writesize = size;
return;
}
/*
* chfs_change_size_free - updates free size
* "change" parameter is positive if we have to increase the size
* and negative if we have to decrease it
*/
void
chfs_change_size_free(struct chfs_mount *chmp,
struct chfs_eraseblock *cheb, int change)
{
KASSERT(mutex_owned(&chmp->chm_lock_sizes));
KASSERT((int)(chmp->chm_free_size + change) >= 0);
KASSERT((int)(cheb->free_size + change) >= 0);
KASSERT((int)(cheb->free_size + change) <= chmp->chm_ebh->eb_size);
chmp->chm_free_size += change;
cheb->free_size += change;
return;
}
/*
* chfs_change_size_dirty - updates dirty size
* "change" parameter is positive if we have to increase the size
* and negative if we have to decrease it
*/
void
chfs_change_size_dirty(struct chfs_mount *chmp,
struct chfs_eraseblock *cheb, int change)
{
KASSERT(mutex_owned(&chmp->chm_lock_sizes));
KASSERT((int)(chmp->chm_dirty_size + change) >= 0);
KASSERT((int)(cheb->dirty_size + change) >= 0);
KASSERT((int)(cheb->dirty_size + change) <= chmp->chm_ebh->eb_size);
chmp->chm_dirty_size += change;
cheb->dirty_size += change;
return;
}
/*
* chfs_change_size_unchecked - updates unchecked size
* "change" parameter is positive if we have to increase the size
* and negative if we have to decrease it
*/
void
chfs_change_size_unchecked(struct chfs_mount *chmp,
struct chfs_eraseblock *cheb, int change)
{
KASSERT(mutex_owned(&chmp->chm_lock_sizes));
KASSERT((int)(chmp->chm_unchecked_size + change) >= 0);
KASSERT((int)(cheb->unchecked_size + change) >= 0);
KASSERT((int)(cheb->unchecked_size + change) <= chmp->chm_ebh->eb_size);
chmp->chm_unchecked_size += change;
cheb->unchecked_size += change;
return;
}
/*
* chfs_change_size_used - updates used size
* "change" parameter is positive if we have to increase the size
* and negative if we have to decrease it
*/
void
chfs_change_size_used(struct chfs_mount *chmp,
struct chfs_eraseblock *cheb, int change)
{
KASSERT(mutex_owned(&chmp->chm_lock_sizes));
KASSERT((int)(chmp->chm_used_size + change) >= 0);
KASSERT((int)(cheb->used_size + change) >= 0);
KASSERT((int)(cheb->used_size + change) <= chmp->chm_ebh->eb_size);
chmp->chm_used_size += change;
cheb->used_size += change;
return;
}
/*
* chfs_change_size_wasted - updates wasted size
* "change" parameter is positive if we have to increase the size
* and negative if we have to decrease it
*/
void
chfs_change_size_wasted(struct chfs_mount *chmp,
struct chfs_eraseblock *cheb, int change)
{
KASSERT(mutex_owned(&chmp->chm_lock_sizes));
KASSERT((int)(chmp->chm_wasted_size + change) >= 0);
KASSERT((int)(cheb->wasted_size + change) >= 0);
KASSERT((int)(cheb->wasted_size + change) <= chmp->chm_ebh->eb_size);
chmp->chm_wasted_size += change;
cheb->wasted_size += change;
return;
}