X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/blobdiff_plain/15f789eaa09d58cbf06b92b82357da8397681e9e..d6a210b8892ac0ed06413480a1cbf1991c128a86:/usr/src/sys/ufs/lfs/lfs_inode.c

diff --git a/usr/src/sys/ufs/lfs/lfs_inode.c b/usr/src/sys/ufs/lfs/lfs_inode.c
index e886869d40..18d152b397 100644
--- a/usr/src/sys/ufs/lfs/lfs_inode.c
+++ b/usr/src/sys/ufs/lfs/lfs_inode.c
@@ -1,4 +1,4 @@
-/*	lfs_inode.c	4.1	%G%	*/
+/*	lfs_inode.c	4.5	81/04/28	*/
 
 #include "../h/param.h"
 #include "../h/systm.h"
@@ -24,11 +24,12 @@ short	ifreel;
 ihinit()
 {
 	register int i;
+	register struct inode *ip = inode;
 
 	ifreel = 0;
-	for (i = 0; i < NINODE - 1; i++)
-		inode[i].i_hlink = i+1;
-	inode[NINODE - 1].i_hlink = -1;
+	for (i = 0; i < ninode-1; i++, ip++)
+		ip->i_hlink = i+1;
+	ip->i_hlink = -1;
 	for (i = 0; i < INOHSZ; i++)
 		inohash[i] = -1;
 }
@@ -63,8 +64,6 @@ ino_t ino;
  * In all cases, a pointer to a locked
  * inode structure is returned.
  *
- * printf warning: no inodes -- if the inode
- *	structure is full
  * panic: no imt -- if the mounted file
  *	system is not in the mount table.
  *	"cannot happen"
@@ -106,7 +105,7 @@ loop:
 		ip = &inode[ip->i_hlink];
 	}
 	if(ifreel < 0) {
-		printf("Inode table overflow\n");
+		tablefull("inode");
 		u.u_error = ENFILE;
 		return(NULL);
 	}
@@ -411,3 +410,41 @@ struct inode *ip;
 	writei(u.u_pdir);
 	iput(u.u_pdir);
 }
+
+#ifdef plock
+#undef plock
+#endif
+#ifdef prele
+#undef prele
+#endif
+/*
+ * Lock an inode (should be called ilock).
+ * If its already locked,
+ * set the WANT bit and sleep.
+ */
+plock(ip)
+register struct inode *ip;
+{
+
+	while(ip->i_flag&ILOCK) {
+		ip->i_flag |= IWANT;
+		sleep((caddr_t)ip, PINOD);
+	}
+	ip->i_flag |= ILOCK;
+}
+
+/*
+ * Unlock an inode.
+ * If WANT bit is on,
+ * wakeup.
+ */
+prele(ip)
+register struct inode *ip;
+{
+
+	ip->i_flag &= ~ILOCK;
+	if(ip->i_flag&IWANT) {
+		ip->i_flag &= ~IWANT;
+		wakeup((caddr_t)ip);
+	}
+}