Remove pseudocode from VOP_* manual pages. It was out of date anyway.

Reviewed by:	scottl
Approved by:	rwatson (mentor)

1 files changed, 0 insertions, 254 deletions

diff --git a/share/man/man9/VOP_LOOKUP.9 b/share/man/man9/VOP_LOOKUP.9
index 270f83f..ba5a260 100644
--- a/share/man/man9/VOP_LOOKUP.9
+++ b/share/man/man9/VOP_LOOKUP.9
@@ -156,260 +156,6 @@ is specified and the operation would succeed, the special return value
 .Er EJUSTRETURN
 is returned.
 Otherwise, an appropriate error code is returned.
-.Sh PSEUDOCODE
-.Bd -literal
-int
-vop_lookup(struct vnode *dvp,
-	   struct vnode **vpp,
-	   struct componentname *cnp)
-{
-    int error;
-    int nameiop = cnp->cn_nameiop;
-    int flags = cnp->cn_flags;
-    int lockparent = flags & LOCKPARENT;
-    int islastcn = flags & ISLASTCN;
-    struct vnode *vp = NULL;
-
-    /*
-     * Check accessibility of directory.
-     */
-    if (dvp->v_type != VDIR)
-	return ENOTDIR;
-
-    error = VOP_ACCESS(dvp, VEXEC, cred, cnp->cn_thread);
-    if (error)
-	return (error);
-
-    if (islastcn && (dvp->v_mount->mnt_flag & MNT_RDONLY) &&
-	(cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME))
-	return (EROFS);
-
-    /*
-     * Check name cache for directory/name pair.  This returns ENOENT
-     * if the name is known not to exist, -1 if the name was found, or
-     * zero if not.
-     */
-    error = cache_lookup(dvp, vpp, cnp);
-    if (error) {
-	int vpid;
-
-	if (error = ENOENT)
-	    return error;
-
-	vp = *vpp;
-	if (dvp == vp) {	/* lookup on "." */
-	    VREF(vp);
-	    error = 0;
-	} else if (flags & ISDOTDOT) {
-            /*
-	     * We need to unlock the directory before getting
-	     * the locked vnode for ".." to avoid deadlocks.
-	     */
-	    VOP_UNLOCK(dvp);
-	    error = vget(vp, 1);
-	    if (!error) {
-		if (lockparent && islastcn)
-		    error = VOP_LOCK(dvp);
-	    }
-	} else {
-	    error = vget(vp, 1);
-	    if (error || !(lockparent && islastcn)) {
-		VOP_UNLOCK(dvp);
-	    }
-	}
-
-	/*
-	 * Check that the capability number did not change
-	 * while we were waiting for the lock.
-	 */
-	if (!error) {
-	    if (vpid == vp->v_id) {
-		/*
-		 * dvp is locked if lockparent && islastcn.
-		 * vp is locked.
-		 */
-		return (0);
-	    }
-	    vput(vp);
-
-	    if (dvp != vp && lockparent && islastcn)
-		VOP_UNLOCK(pdp);
-	}
-
-	/*
-	 * Re-lock dvp for the directory search below.
-	 */
-	error = VOP_LOCK(dvp);
-	if (error) {
-	    return (error);
-	}
-
-	*vpp = NULL;
-    }
-
-    /*
-     * Search dvp for the component cnp->cn_nameptr.
-     */
-    ...;
-
-    if (!found) {
-	if ((nameiop == CREATE || nameiop == RENAME)
-	    && islastcn
-	    && directory dvp has not been removed) {
-	    /*
-	     * Check for write access on directory.
-	     */
-
-	    /*
-	     * Possibly record the position of a slot in the directory
-	     * large enough for the new component name.  This can be
-	     * recorded in the vnode private data for dvp.
-	     * Set the SAVENAME flag to hold onto the pathname for use
-	     * later in VOP_CREATE or VOP_RENAME.
-	     */
-	    cnp->cn_flags |= SAVENAME;
-	    if (!lockparent)
-		/*
-		 * Note that the extra data recorded above is only
-		 * useful if lockparent is specified.
-		 */
-		VOP_UNLOCK(dvp);
-
-	    return EJUSTRETURN;
-	}
-
-	/*
-	 * Consider inserting name into cache.
-	 */
-	if ((cnp->cn_flags & MAKEENTRY) && nameiop != CREATE)
-	    cache_enter(dvp, NULL, cnp);
-
-	return ENOENT;
-    } else {
-	/*
-	 * If deleting, and at end of pathname, return parameters
-	 * which can be used to remove file.  If the wantparent flag
-	 * isn't set, we return only the directory, otherwise we go on
-	 * and lock the inode, being careful with ".".
-	 */
-	if (nameiop == DELETE && islastcn) {
-	    /*
-	     * Check for write access on directory.
-	     */
-	    error = VOP_ACCESS(dvp, VWRITE, cred, cnp->cn_thread);
-	    if (error)
-		return (error);
-
-	    if (found entry is same as dvp) {
-		VREF(dvp);
-		*vpp = dvp;
-		return 0;
-	    }
-
-	    error = VFS_VGET(dvp->v_mount, ..., &vp);
-	    if (error)
-		return error;
-
-	    if (directory is sticky
-		&& cred->cr_uid != 0
-		&& cred->cr_uid != owner of dvp
-		&& owner of vp != cred->cr_uid) {
-		vput(vp);
-		return EPERM;
-	    }
-	    *vpp = vp;
-	    if (!lockparent)
-		VOP_UNLOCK(dvp);
-
-	    return 0;
-	}
-
-	/*
-	 * If rewriting (RENAME), return the inode and the
-	 * information required to rewrite the present directory
-	 * Must get inode of directory entry to verify it's a
-	 * regular file, or empty directory.
-	 */
-	if (nameiop == RENAME && wantparent && islastcn) {
-	    error = VOP_ACCESS(dvp, VWRITE, cred, cnp->cn_thread);
-	    if (error)
-		return (error);
-
-	    /*
-	     * Check for "."
-	     */
-	    if (found entry is same as dvp)
-		return EISDIR;
-
-	    error = VFS_VGET(dvp->v_mount, ..., &vp);
-	    if (error)
-		return error;
-	    *vpp = vp;
-	    /*
-	     * Save the name for use in VOP_RENAME later.
-	     */
-	    cnp->cn_flags |= SAVENAME;
-	    if (!lockparent)
-		VOP_UNLOCK(dvp);
-
-	    return 0;
-	}
-
-	/*
-	 * Step through the translation in the name.  We do not `vput' the
-	 * directory because we may need it again if a symbolic link
-	 * is relative to the current directory.  Instead we save it
-	 * unlocked as "pdp".  We must get the target inode before unlocking
-	 * the directory to insure that the inode will not be removed
-	 * before we get it.  We prevent deadlock by always fetching
-	 * inodes from the root, moving down the directory tree. Thus
-	 * when following backward pointers ".." we must unlock the
-	 * parent directory before getting the requested directory.
-	 * There is a potential race condition here if both the current
-	 * and parent directories are removed before the VFS_VGET for the
-	 * inode associated with ".." returns.  We hope that this occurs
-	 * infrequently since we cannot avoid this race condition without
-	 * implementing a sophisticated deadlock detection algorithm.
-	 * Note also that this simple deadlock detection scheme will not
-	 * work if the file system has any hard links other than ".."
-	 * that point backwards in the directory structure.
-	 */
-	if (flags & ISDOTDOT) {
-	    VOP_UNLOCK(dvp);	/* race to get the inode */
-	    error = VFS_VGET(dvp->v_mount, ..., &vp);
-	    if (error) {
-		VOP_LOCK(dvp);
-		return (error);
-	    }
-	    if (lockparent && islastcn) {
-		error = VOP_LOCK(dvp);
-		if (error) {
-		    vput(vp);
-		    return error;
-		}
-	    }
-	    *vpp = vp;
-	} else if (found entry is same as dvp) {
-	    VREF(dvp);	/* we want ourself, ie "." */
-	    *vpp = dvp;
-	} else {
-	    error = VFS_VGET(dvp->v_mount, ..., &vp);
-	    if (error)
-		return (error);
-	    if (!lockparent || !islastcn)
-		VOP_UNLOCK(dvp);
-	    *vpp = vp;
-	}
-
-	/*
-	 * Insert name into cache if appropriate.
-	 */
-	if (cnp->cn_flags & MAKEENTRY)
-	    cache_enter(dvp, *vpp, cnp);
-	return (0);
-    }
-}
-.Ed
 .Sh ERRORS
 .Bl -tag -width Er
 .It Bq Er ENOTDIR