+ * %sccs.include.redist.c%
+ *
+ * @(#)lfs_vnops.c 7.94 (Berkeley) %G%
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/namei.h>
+#include <sys/resourcevar.h>
+#include <sys/kernel.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/buf.h>
+#include <sys/proc.h>
+#include <sys/conf.h>
+#include <sys/mount.h>
+#include <sys/vnode.h>
+#include <sys/malloc.h>
+
+#include <vm/vm.h>
+
+#include <miscfs/specfs/specdev.h>
+#include <miscfs/fifofs/fifo.h>
+
+#include <ufs/ufs/quota.h>
+#include <ufs/ufs/inode.h>
+#include <ufs/ufs/dir.h>
+#include <ufs/ufs/ufsmount.h>
+#include <ufs/ufs/ufs_extern.h>
+
+#include <ufs/lfs/lfs.h>
+#include <ufs/lfs/lfs_extern.h>
+
+/* Global vfs data structures for lfs. */
+int (**lfs_vnodeop_p)();
+struct vnodeopv_entry_desc lfs_vnodeop_entries[] = {
+ { &vop_default_desc, vn_default_error },
+ { &vop_lookup_desc, ufs_lookup }, /* lookup */
+ { &vop_create_desc, lfs_create }, /* create */
+ { &vop_mknod_desc, lfs_mknod }, /* mknod */
+ { &vop_open_desc, ufs_open }, /* open */
+ { &vop_close_desc, lfs_close }, /* close */
+ { &vop_access_desc, ufs_access }, /* access */
+ { &vop_getattr_desc, lfs_getattr }, /* getattr */
+ { &vop_setattr_desc, ufs_setattr }, /* setattr */
+ { &vop_read_desc, lfs_read }, /* read */
+ { &vop_write_desc, lfs_write }, /* write */
+ { &vop_ioctl_desc, ufs_ioctl }, /* ioctl */
+ { &vop_select_desc, ufs_select }, /* select */
+ { &vop_mmap_desc, ufs_mmap }, /* mmap */
+ { &vop_fsync_desc, lfs_fsync }, /* fsync */
+ { &vop_seek_desc, ufs_seek }, /* seek */
+ { &vop_remove_desc, lfs_remove }, /* remove */
+ { &vop_link_desc, lfs_link }, /* link */
+ { &vop_rename_desc, lfs_rename }, /* rename */
+ { &vop_mkdir_desc, lfs_mkdir }, /* mkdir */
+ { &vop_rmdir_desc, lfs_rmdir }, /* rmdir */
+ { &vop_symlink_desc, lfs_symlink }, /* symlink */
+ { &vop_readdir_desc, ufs_readdir }, /* readdir */
+ { &vop_readlink_desc, ufs_readlink }, /* readlink */
+ { &vop_abortop_desc, ufs_abortop }, /* abortop */
+ { &vop_inactive_desc, lfs_inactive }, /* inactive */
+ { &vop_reclaim_desc, ufs_reclaim }, /* reclaim */
+ { &vop_lock_desc, ufs_lock }, /* lock */
+ { &vop_unlock_desc, ufs_unlock }, /* unlock */
+ { &vop_bmap_desc, lfs_bmap }, /* bmap */
+ { &vop_strategy_desc, ufs_strategy }, /* strategy */
+ { &vop_print_desc, ufs_print }, /* print */
+ { &vop_islocked_desc, ufs_islocked }, /* islocked */
+ { &vop_advlock_desc, ufs_advlock }, /* advlock */
+ { &vop_blkatoff_desc, lfs_blkatoff }, /* blkatoff */
+ { &vop_valloc_desc, lfs_valloc }, /* valloc */
+ { &vop_vfree_desc, lfs_vfree }, /* vfree */
+ { &vop_truncate_desc, lfs_truncate }, /* truncate */
+ { &vop_update_desc, lfs_update }, /* update */
+ { &vop_bwrite_desc, lfs_bwrite }, /* bwrite */
+ { (struct vnodeop_desc*)NULL, (int(*)())NULL }
+};
+struct vnodeopv_desc lfs_vnodeop_opv_desc =
+ { &lfs_vnodeop_p, lfs_vnodeop_entries };
+
+int (**lfs_specop_p)();
+struct vnodeopv_entry_desc lfs_specop_entries[] = {
+ { &vop_default_desc, vn_default_error },
+ { &vop_lookup_desc, spec_lookup }, /* lookup */
+ { &vop_create_desc, spec_create }, /* create */
+ { &vop_mknod_desc, spec_mknod }, /* mknod */
+ { &vop_open_desc, spec_open }, /* open */
+ { &vop_close_desc, ufsspec_close }, /* close */
+ { &vop_access_desc, ufs_access }, /* access */
+ { &vop_getattr_desc, lfs_getattr }, /* getattr */
+ { &vop_setattr_desc, ufs_setattr }, /* setattr */
+ { &vop_read_desc, ufsspec_read }, /* read */
+ { &vop_write_desc, ufsspec_write }, /* write */
+ { &vop_ioctl_desc, spec_ioctl }, /* ioctl */
+ { &vop_select_desc, spec_select }, /* select */
+ { &vop_mmap_desc, spec_mmap }, /* mmap */
+ { &vop_fsync_desc, spec_fsync }, /* fsync */
+ { &vop_seek_desc, spec_seek }, /* seek */
+ { &vop_remove_desc, spec_remove }, /* remove */
+ { &vop_link_desc, spec_link }, /* link */
+ { &vop_rename_desc, spec_rename }, /* rename */
+ { &vop_mkdir_desc, spec_mkdir }, /* mkdir */
+ { &vop_rmdir_desc, spec_rmdir }, /* rmdir */
+ { &vop_symlink_desc, spec_symlink }, /* symlink */
+ { &vop_readdir_desc, spec_readdir }, /* readdir */
+ { &vop_readlink_desc, spec_readlink }, /* readlink */
+ { &vop_abortop_desc, spec_abortop }, /* abortop */
+ { &vop_inactive_desc, lfs_inactive }, /* inactive */
+ { &vop_reclaim_desc, ufs_reclaim }, /* reclaim */
+ { &vop_lock_desc, ufs_lock }, /* lock */
+ { &vop_unlock_desc, ufs_unlock }, /* unlock */
+ { &vop_bmap_desc, spec_bmap }, /* bmap */
+ { &vop_strategy_desc, spec_strategy }, /* strategy */
+ { &vop_print_desc, ufs_print }, /* print */
+ { &vop_islocked_desc, ufs_islocked }, /* islocked */
+ { &vop_advlock_desc, spec_advlock }, /* advlock */
+ { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */
+ { &vop_valloc_desc, spec_valloc }, /* valloc */
+ { &vop_vfree_desc, lfs_vfree }, /* vfree */
+ { &vop_truncate_desc, spec_truncate }, /* truncate */
+ { &vop_update_desc, lfs_update }, /* update */
+ { &vop_bwrite_desc, lfs_bwrite }, /* bwrite */
+ { (struct vnodeop_desc*)NULL, (int(*)())NULL }
+};
+struct vnodeopv_desc lfs_specop_opv_desc =
+ { &lfs_specop_p, lfs_specop_entries };
+
+#ifdef FIFO
+int (**lfs_fifoop_p)();
+struct vnodeopv_entry_desc lfs_fifoop_entries[] = {
+ { &vop_default_desc, vn_default_error },
+ { &vop_lookup_desc, fifo_lookup }, /* lookup */
+ { &vop_create_desc, fifo_create }, /* create */
+ { &vop_mknod_desc, fifo_mknod }, /* mknod */
+ { &vop_open_desc, fifo_open }, /* open */
+ { &vop_close_desc, ufsfifo_close }, /* close */
+ { &vop_access_desc, ufs_access }, /* access */
+ { &vop_getattr_desc, lfs_getattr }, /* getattr */
+ { &vop_setattr_desc, ufs_setattr }, /* setattr */
+ { &vop_read_desc, ufsfifo_read }, /* read */
+ { &vop_write_desc, ufsfifo_write }, /* write */
+ { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */
+ { &vop_select_desc, fifo_select }, /* select */
+ { &vop_mmap_desc, fifo_mmap }, /* mmap */
+ { &vop_fsync_desc, fifo_fsync }, /* fsync */
+ { &vop_seek_desc, fifo_seek }, /* seek */
+ { &vop_remove_desc, fifo_remove }, /* remove */
+ { &vop_link_desc, fifo_link }, /* link */
+ { &vop_rename_desc, fifo_rename }, /* rename */
+ { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */
+ { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */
+ { &vop_symlink_desc, fifo_symlink }, /* symlink */
+ { &vop_readdir_desc, fifo_readdir }, /* readdir */
+ { &vop_readlink_desc, fifo_readlink }, /* readlink */
+ { &vop_abortop_desc, fifo_abortop }, /* abortop */
+ { &vop_inactive_desc, lfs_inactive }, /* inactive */
+ { &vop_reclaim_desc, ufs_reclaim }, /* reclaim */
+ { &vop_lock_desc, ufs_lock }, /* lock */
+ { &vop_unlock_desc, ufs_unlock }, /* unlock */
+ { &vop_bmap_desc, fifo_bmap }, /* bmap */
+ { &vop_strategy_desc, fifo_strategy }, /* strategy */
+ { &vop_print_desc, ufs_print }, /* print */
+ { &vop_islocked_desc, ufs_islocked }, /* islocked */
+ { &vop_advlock_desc, fifo_advlock }, /* advlock */
+ { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */
+ { &vop_valloc_desc, fifo_valloc }, /* valloc */
+ { &vop_vfree_desc, lfs_vfree }, /* vfree */
+ { &vop_truncate_desc, fifo_truncate }, /* truncate */
+ { &vop_update_desc, lfs_update }, /* update */
+ { &vop_bwrite_desc, lfs_bwrite }, /* bwrite */
+ { (struct vnodeop_desc*)NULL, (int(*)())NULL }
+};
+struct vnodeopv_desc lfs_fifoop_opv_desc =
+ { &lfs_fifoop_p, lfs_fifoop_entries };
+#endif /* FIFO */
+
+/*
+ * Vnode op for reading.
+ */
+/* ARGSUSED */
+lfs_read(ap)
+ struct vop_read_args /* {
+ struct vnode *a_vp;
+ struct uio *a_uio;
+ int a_ioflag;
+ struct ucred *a_cred;
+ } */ *ap;
+{
+ register struct vnode *vp = ap->a_vp;
+ register struct inode *ip = VTOI(vp);
+ register struct uio *uio = ap->a_uio;
+ register struct lfs *fs;
+ struct buf *bp1, *bp2;
+ daddr_t lbn, bn, rablock;
+ off_t diff;
+ int error = 0, size;
+ long n, on;
+
+#ifdef DIAGNOSTIC
+ int type;
+ if (uio->uio_rw != UIO_READ)
+ panic("lfs_read mode");
+ type = ip->i_mode & IFMT;
+ if (type != IFDIR && type != IFREG && type != IFLNK)
+ panic("lfs_read type");
+ if (type == IFLNK && (int)ip->i_size < vp->v_mount->mnt_maxsymlinklen)
+ panic("read short symlink");
+#endif
+ if (uio->uio_resid == 0)
+ return (0);
+ fs = ip->i_lfs;
+ if (uio->uio_offset < 0 ||
+ (u_quad_t)uio->uio_offset + uio->uio_resid > fs->lfs_maxfilesize)
+ return (EFBIG);
+ ip->i_flag |= IACC;
+ bp1 = bp2 = NULL;
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