Init

sys/pcfs/pc_node.h

@@ -0,0 +1,79 @@
+/*	@(#)pc_node.h 1.1 94/10/31 SMI	*/
+
+/*
+ * Copyright (c) 1989 by Sun Microsystems, Inc.
+ */
+
+struct pcnode {
+	struct pcnode *pc_forw;		/* active list ptrs, must be first */
+	struct pcnode *pc_back;
+	int pc_flags;			/* see below */
+	struct vnode * pc_vn;		/* vnode for pcnode */
+	long pc_size;			/* size of file */
+	short pc_scluster;		/* starting cluster of file */
+	daddr_t pc_eblkno;		/* disk blkno for entry */
+	int pc_eoffset;			/* offset in disk block of entry */
+	struct pcdir pc_entry;		/* directory entry of file */
+};
+
+/*
+ * flags
+ */
+#define	PC_MOD		0x01		/* file data has been modified */
+#define	PC_CHG		0x02		/* node data has been changed */
+#define	PC_INVAL	0x04		/* node is invalid */
+#define	PC_RELE_PEND	0x08		/* node is waiting to be released */
+#define	PC_EXTERNAL	0x10		/* vnode ref is held externally */
+
+#define	PCTOV(PCP)	((PCP)->pc_vn)
+#define	VTOPC(VP)	((struct pcnode *)((VP)->v_data))
+
+#define	PRIPCNODE	(PZERO - 1)
+
+/*
+ * Make a unique integer for a file
+ */
+#define	ENTPS		(PC_SECSIZE / sizeof (struct pcdir))
+
+#define	pc_makenodeid(BN, OFF, EP) \
+	((EP)->pcd_attr & PCA_DIR? \
+		-ltohs((EP)->pcd_scluster) - 1: \
+		((BN) * ENTPS) + ((OFF) / sizeof (struct pcdir)))
+
+#define	NPCHASH 1
+
+#if NPCHASH == 1
+#define	PCFHASH(FSP, BN, O)	0
+#define	PCDHASH(FSP, SC)	0
+#else
+#define	PCFHASH(FSP, BN, O)	(((unsigned)FSP + BN + O) % NPCHASH)
+#define	PCDHASH(FSP, SC)	(((unsigned)FSP + SC) % NPCHASH)
+#endif
+
+struct pchead {
+	struct pcnode *pch_forw;
+	struct pcnode *pch_back;
+};
+
+/*
+ * pcnode file, directory and invalid node operations vectors
+ */
+extern struct vnodeops pcfs_fvnodeops;
+extern struct vnodeops pcfs_dvnodeops;
+extern struct pchead pcfhead[];
+extern struct pchead pcdhead[];
+
+/*
+ * pcnode routines
+ */
+extern void pc_init();
+extern struct pcnode *pc_getnode();	/* get a pcnode for a file */
+extern void pc_rele();			/* release a pcnode */
+extern void pc_mark();			/* mark pcnode with current time */
+extern int pc_nodesync();		/* flush node blocks and update entry */
+extern int pc_nodeupdate();		/* update node directory entry */
+extern int pc_bmap();			/* map logical to physical blocks */
+extern int pc_balloc();			/* allocate blocks for a file */
+extern int pc_bfree();			/* free blocks for a file */
+extern int pc_verify();			/* verify a pcnode with the disk */
+extern void pc_diskchanged();		/* call when disk change is detected */