/*
* Look up a EXT2FS 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
ext2fs_vget(struct mount *mp, ino_t ino, struct vnode **vpp)
{
struct m_ext2fs *fs;
struct inode *ip;
struct ext2fs_dinode *dp;
struct ufsmount *ump;
struct buf *bp;
struct vnode *vp;
dev_t dev;
int error;
if (ino > (ufsino_t)-1)
panic("ext2fs_vget: alien ino_t %llu",
(unsigned long long)ino);
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_EXT2FS, mp, &ext2fs_vops, &vp)) != 0) {
*vpp = NULL;
return (error);
}
ip = pool_get(&ext2fs_inode_pool, PR_WAITOK|PR_ZERO);
lockinit(&ip->i_lock, PINOD, "inode", 0, 0);
vp->v_data = ip;
ip->i_vnode = vp;
ip->i_ump = ump;
ip->i_e2fs = fs = ump->um_e2fs;
ip->i_dev = dev;
ip->i_number = ino;
ip->i_e2fs_last_lblk = 0;
ip->i_e2fs_last_blk = 0;
/*
* 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) {
/*
* Inode has not been inserted into the chain, so make sure
* we don't try to remove it.
*/
ip->i_flag |= IN_UNHASHED;
/*
* 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->e2fs_bsize, &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);
}
dp = (struct ext2fs_dinode *) ((char *)bp->b_data
+ EXT2_DINODE_SIZE(fs) * ino_to_fsbo(fs, ino));
ip->i_e2din = pool_get(&ext2fs_dinode_pool, PR_WAITOK);
e2fs_iload(dp, ip->i_e2din);
brelse(bp);
ip->i_effnlink = ip->i_e2fs_nlink;
/*
* The fields for storing the UID and GID of an ext2fs inode are
* limited to 16 bits. To overcome this limitation, Linux decided to
* scatter the highest bits of these values into a previously reserved
* area on the disk inode. We deal with this situation by having two
* 32-bit fields *out* of the disk inode to hold the complete values.
* Now that we are reading in the inode, compute these fields.
*/
ip->i_e2fs_uid = ip->i_e2fs_uid_low | (ip->i_e2fs_uid_high << 16);
ip->i_e2fs_gid = ip->i_e2fs_gid_low | (ip->i_e2fs_gid_high << 16);
/* If the inode was deleted, reset all fields */
if (ip->i_e2fs_dtime != 0) {
ip->i_e2fs_mode = ip->i_e2fs_nblock = 0;
(void)ext2fs_setsize(ip, 0);
}
/*
* Initialize the vnode from the inode, check for aliases.
* Note that the underlying vnode may have changed.
*/
error = ext2fs_vinit(mp, &ext2fs_specvops, EXT2FS_FIFOOPS, &vp);
if (error) {
vput(vp);
*vpp = NULL;
return (error);
}
/*
* Finish inode initialization now that aliasing has been resolved.
*/
vref(ip->i_devvp);
/*
* Set up a generation number for this inode if it does not
* already have one. This should only happen on old filesystems.
*/
if (ip->i_e2fs_gen == 0) {
if (++ext2gennumber < (u_long)time_second)
ext2gennumber = time_second;
ip->i_e2fs_gen = ext2gennumber;
if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0)
ip->i_flag |= IN_MODIFIED;
}
*vpp = vp;
return (0);
}
/*
* 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);
}
/*
* Look up a EXT2FS 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
ext2fs_vget(struct mount *mp, ino_t ino, struct vnode **vpp)
{
struct m_ext2fs *fs;
struct inode *ip;
struct ufsmount *ump;
struct buf *bp;
struct vnode *vp;
dev_t dev;
int error;
void *cp;
ump = VFSTOUFS(mp);
dev = ump->um_dev;
retry:
if ((*vpp = ufs_ihashget(dev, ino, LK_EXCLUSIVE)) != NULL)
return (0);
/* Allocate a new vnode/inode. */
error = getnewvnode(VT_EXT2FS, mp, ext2fs_vnodeop_p, NULL, &vp);
if (error) {
*vpp = NULL;
return (error);
}
ip = pool_get(&ext2fs_inode_pool, PR_WAITOK);
mutex_enter(&ufs_hashlock);
if ((*vpp = ufs_ihashget(dev, ino, 0)) != NULL) {
mutex_exit(&ufs_hashlock);
ungetnewvnode(vp);
pool_put(&ext2fs_inode_pool, ip);
goto retry;
}
vp->v_vflag |= VV_LOCKSWORK;
memset(ip, 0, sizeof(struct inode));
vp->v_data = ip;
ip->i_vnode = vp;
ip->i_ump = ump;
ip->i_e2fs = fs = ump->um_e2fs;
ip->i_dev = dev;
ip->i_number = ino;
ip->i_e2fs_last_lblk = 0;
ip->i_e2fs_last_blk = 0;
genfs_node_init(vp, &ext2fs_genfsops);
/*
* 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.
*/
ufs_ihashins(ip);
mutex_exit(&ufs_hashlock);
/* Read in the disk contents for the inode, copy into the inode. */
error = bread(ump->um_devvp, EXT2_FSBTODB(fs, ino_to_fsba(fs, ino)),
(int)fs->e2fs_bsize, NOCRED, 0, &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);
*vpp = NULL;
return (error);
}
cp = (char *)bp->b_data + (ino_to_fsbo(fs, ino) * EXT2_DINODE_SIZE(fs));
ip->i_din.e2fs_din = pool_get(&ext2fs_dinode_pool, PR_WAITOK);
e2fs_iload((struct ext2fs_dinode *)cp, ip->i_din.e2fs_din);
ext2fs_set_inode_guid(ip);
brelse(bp, 0);
/* If the inode was deleted, reset all fields */
if (ip->i_e2fs_dtime != 0) {
ip->i_e2fs_mode = 0;
(void)ext2fs_setsize(ip, 0);
(void)ext2fs_setnblock(ip, 0);
memset(ip->i_e2fs_blocks, 0, sizeof(ip->i_e2fs_blocks));
}
/*
* Initialize the vnode from the inode, check for aliases.
*/
error = ext2fs_vinit(mp, ext2fs_specop_p, ext2fs_fifoop_p, &vp);
if (error) {
vput(vp);
*vpp = NULL;
return (error);
}
/*
* Finish inode initialization now that aliasing has been resolved.
*/
ip->i_devvp = ump->um_devvp;
vref(ip->i_devvp);
/*
* Set up a generation number for this inode if it does not
* already have one. This should only happen on old filesystems.
*/
if (ip->i_e2fs_gen == 0) {
if (++ext2gennumber < (u_long)time_second)
ext2gennumber = time_second;
ip->i_e2fs_gen = ext2gennumber;
if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0)
ip->i_flag |= IN_MODIFIED;
}
uvm_vnp_setsize(vp, ext2fs_size(ip));
*vpp = vp;
return (0);
}
