static int
update_inoblk(struct lfs *fs, daddr_t offset, kauth_cred_t cred,
struct lwp *l)
{
struct vnode *devvp, *vp;
struct inode *ip;
struct ufs1_dinode *dip;
struct buf *dbp, *ibp;
int error;
daddr_t daddr;
IFILE *ifp;
SEGUSE *sup;
devvp = VTOI(fs->lfs_ivnode)->i_devvp;
/*
* Get the inode, update times and perms.
* DO NOT update disk blocks, we do that separately.
*/
error = bread(devvp, fsbtodb(fs, offset), fs->lfs_ibsize,
cred, 0, &dbp);
if (error) {
DLOG((DLOG_RF, "update_inoblk: bread returned %d\n", error));
return error;
}
dip = ((struct ufs1_dinode *)(dbp->b_data)) + INOPB(fs);
while (--dip >= (struct ufs1_dinode *)dbp->b_data) {
if (dip->di_inumber > LFS_IFILE_INUM) {
error = lfs_rf_valloc(fs, dip->di_inumber, dip->di_gen,
l, &vp);
if (error) {
DLOG((DLOG_RF, "update_inoblk: lfs_rf_valloc"
" returned %d\n", error));
continue;
}
ip = VTOI(vp);
if (dip->di_size != ip->i_size)
lfs_truncate(vp, dip->di_size, 0, NOCRED);
/* Get mode, link count, size, and times */
memcpy(ip->i_din.ffs1_din, dip,
offsetof(struct ufs1_dinode, di_db[0]));
/* Then the rest, except di_blocks */
ip->i_flags = ip->i_ffs1_flags = dip->di_flags;
ip->i_gen = ip->i_ffs1_gen = dip->di_gen;
ip->i_uid = ip->i_ffs1_uid = dip->di_uid;
ip->i_gid = ip->i_ffs1_gid = dip->di_gid;
ip->i_mode = ip->i_ffs1_mode;
ip->i_nlink = ip->i_ffs1_nlink;
ip->i_size = ip->i_ffs1_size;
LFS_SET_UINO(ip, IN_CHANGE | IN_UPDATE);
/* Re-initialize to get type right */
ufs_vinit(vp->v_mount, lfs_specop_p, lfs_fifoop_p,
&vp);
vput(vp);
/* Record change in location */
LFS_IENTRY(ifp, fs, dip->di_inumber, ibp);
daddr = ifp->if_daddr;
ifp->if_daddr = dbtofsb(fs, dbp->b_blkno);
error = LFS_BWRITE_LOG(ibp); /* Ifile */
/* And do segment accounting */
if (dtosn(fs, daddr) != dtosn(fs, dbtofsb(fs, dbp->b_blkno))) {
if (daddr > 0) {
LFS_SEGENTRY(sup, fs, dtosn(fs, daddr),
ibp);
sup->su_nbytes -= sizeof (struct ufs1_dinode);
LFS_WRITESEGENTRY(sup, fs,
dtosn(fs, daddr),
ibp);
}
LFS_SEGENTRY(sup, fs, dtosn(fs, dbtofsb(fs, dbp->b_blkno)),
ibp);
sup->su_nbytes += sizeof (struct ufs1_dinode);
LFS_WRITESEGENTRY(sup, fs,
dtosn(fs, dbtofsb(fs, dbp->b_blkno)),
ibp);
}
}
}
/*
* Allocate a particular inode with a particular version number, freeing
* any previous versions of this inode that may have gone before.
* Used by the roll-forward code.
*
* XXX this function does not have appropriate locking to be used on a live fs;
* XXX but something similar could probably be used for an "undelete" call.
*
* Called with the Ifile inode locked.
*/
int
lfs_rf_valloc(struct lfs *fs, ino_t ino, int vers, struct lwp *l,
struct vnode **vpp)
{
IFILE *ifp;
struct buf *bp, *cbp;
struct vnode *vp;
struct inode *ip;
ino_t tino, oldnext;
int error;
CLEANERINFO *cip;
ASSERT_SEGLOCK(fs); /* XXX it doesn't, really */
/*
* First, just try a vget. If the version number is the one we want,
* we don't have to do anything else. If the version number is wrong,
* take appropriate action.
*/
error = VFS_VGET(fs->lfs_ivnode->v_mount, ino, &vp);
if (error == 0) {
DLOG((DLOG_RF, "lfs_rf_valloc[1]: ino %d vp %p\n", ino, vp));
*vpp = vp;
ip = VTOI(vp);
if (ip->i_gen == vers)
return 0;
else if (ip->i_gen < vers) {
lfs_truncate(vp, (off_t)0, 0, NOCRED);
ip->i_gen = ip->i_ffs1_gen = vers;
LFS_SET_UINO(ip, IN_CHANGE | IN_UPDATE);
return 0;
} else {
DLOG((DLOG_RF, "ino %d: sought version %d, got %d\n",
ino, vers, ip->i_ffs1_gen));
vput(vp);
*vpp = NULLVP;
return EEXIST;
}
}
/*
* The inode is not in use. Find it on the free list.
*/
/* If the Ifile is too short to contain this inum, extend it */
while (VTOI(fs->lfs_ivnode)->i_size <= (ino /
fs->lfs_ifpb + fs->lfs_cleansz + fs->lfs_segtabsz)
<< fs->lfs_bshift) {
lfs_extend_ifile(fs, NOCRED);
}
LFS_IENTRY(ifp, fs, ino, bp);
oldnext = ifp->if_nextfree;
ifp->if_version = vers;
brelse(bp, 0);
LFS_GET_HEADFREE(fs, cip, cbp, &ino);
if (ino) {
LFS_PUT_HEADFREE(fs, cip, cbp, oldnext);
} else {
tino = ino;
while (1) {
LFS_IENTRY(ifp, fs, tino, bp);
if (ifp->if_nextfree == ino ||
ifp->if_nextfree == LFS_UNUSED_INUM)
break;
tino = ifp->if_nextfree;
brelse(bp, 0);
}
if (ifp->if_nextfree == LFS_UNUSED_INUM) {
brelse(bp, 0);
return ENOENT;
}
ifp->if_nextfree = oldnext;
LFS_BWRITE_LOG(bp);
}
error = lfs_ialloc(fs, fs->lfs_ivnode, ino, vers, &vp);
if (error == 0) {
/*
* Make it VREG so we can put blocks on it. We will change
* this later if it turns out to be some other kind of file.
*/
ip = VTOI(vp);
ip->i_mode = ip->i_ffs1_mode = IFREG;
ip->i_nlink = ip->i_ffs1_nlink = 1;
ufs_vinit(vp->v_mount, lfs_specop_p, lfs_fifoop_p, &vp);
ip = VTOI(vp);
DLOG((DLOG_RF, "lfs_rf_valloc: ino %d vp %p\n", ino, vp));
/* The dirop-nature of this vnode is past */
lfs_unmark_vnode(vp);
(void)lfs_vunref(vp);
vp->v_uflag &= ~VU_DIROP;
mutex_enter(&lfs_lock);
--lfs_dirvcount;
--fs->lfs_dirvcount;
TAILQ_REMOVE(&fs->lfs_dchainhd, ip, i_lfs_dchain);
wakeup(&lfs_dirvcount);
wakeup(&fs->lfs_dirvcount);
mutex_exit(&lfs_lock);
}
*vpp = vp;
return error;
}
/*
* Look up a FFS dinode number to find its incore vnode, otherwise read it
* in from disk. If it is in core, wait for the lock bit to clear, then
* return the inode locked. Detection and handling of mount points must be
* done by the calling routine.
*/
int
ffs_vget(struct mount *mp, ino_t ino, struct vnode **vpp)
{
struct fs *fs;
struct inode *ip;
struct ufs1_dinode *dp1;
#ifdef FFS2
struct ufs2_dinode *dp2;
#endif
struct ufsmount *ump;
struct buf *bp;
struct vnode *vp;
dev_t dev;
int error;
ump = VFSTOUFS(mp);
dev = ump->um_dev;
retry:
if ((*vpp = ufs_ihashget(dev, ino)) != NULL)
return (0);
/* Allocate a new vnode/inode. */
if ((error = getnewvnode(VT_UFS, mp, ffs_vnodeop_p, &vp)) != 0) {
*vpp = NULL;
return (error);
}
#ifdef VFSDEBUG
vp->v_flag |= VLOCKSWORK;
#endif
/* XXX - we use the same pool for ffs and mfs */
ip = pool_get(&ffs_ino_pool, PR_WAITOK);
bzero((caddr_t)ip, sizeof(struct inode));
lockinit(&ip->i_lock, PINOD, "inode", 0, 0);
ip->i_ump = ump;
VREF(ip->i_devvp);
vp->v_data = ip;
ip->i_vnode = vp;
ip->i_fs = fs = ump->um_fs;
ip->i_dev = dev;
ip->i_number = ino;
ip->i_vtbl = &ffs_vtbl;
/*
* Put it onto its hash chain and lock it so that other requests for
* this inode will block if they arrive while we are sleeping waiting
* for old data structures to be purged or for the contents of the
* disk portion of this inode to be read.
*/
error = ufs_ihashins(ip);
if (error) {
/*
* VOP_INACTIVE will treat this as a stale file
* and recycle it quickly
*/
vrele(vp);
if (error == EEXIST)
goto retry;
return (error);
}
/* Read in the disk contents for the inode, copy into the inode. */
error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)),
(int)fs->fs_bsize, NOCRED, &bp);
if (error) {
/*
* The inode does not contain anything useful, so it would
* be misleading to leave it on its hash chain. With mode
* still zero, it will be unlinked and returned to the free
* list by vput().
*/
vput(vp);
brelse(bp);
*vpp = NULL;
return (error);
}
#ifdef FFS2
if (ip->i_ump->um_fstype == UM_UFS2) {
ip->i_din2 = pool_get(&ffs_dinode2_pool, PR_WAITOK);
dp2 = (struct ufs2_dinode *) bp->b_data + ino_to_fsbo(fs, ino);
*ip->i_din2 = *dp2;
} else
#endif
{
ip->i_din1 = pool_get(&ffs_dinode1_pool, PR_WAITOK);
dp1 = (struct ufs1_dinode *) bp->b_data + ino_to_fsbo(fs, ino);
*ip->i_din1 = *dp1;
}
brelse(bp);
if (DOINGSOFTDEP(vp))
softdep_load_inodeblock(ip);
else
ip->i_effnlink = DIP(ip, nlink);
/*
* Initialize the vnode from the inode, check for aliases.
* Note that the underlying vnode may have changed.
*/
error = ufs_vinit(mp, ffs_specop_p, FFS_FIFOOPS, &vp);
if (error) {
vput(vp);
*vpp = NULL;
return (error);
}
/*
* Set up a generation number for this inode if it does not
* already have one. This should only happen on old filesystems.
*/
if (DIP(ip, gen) == 0) {
DIP_ASSIGN(ip, gen, arc4random() & INT_MAX);
if (DIP(ip, gen) == 0 || DIP(ip, gen) == -1)
DIP_ASSIGN(ip, gen, 1); /* Shouldn't happen */
if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0)
ip->i_flag |= IN_MODIFIED;
}
/*
* Ensure that uid and gid are correct. This is a temporary
* fix until fsck has been changed to do the update.
*/
if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_inodefmt < FS_44INODEFMT) {
ip->i_ffs1_uid = ip->i_din1->di_ouid;
ip->i_ffs1_gid = ip->i_din1->di_ogid;
}
*vpp = vp;
return (0);
}