pc_node.h revision 9521:b061a79d3d1a 
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21/*
22 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
23 * Use is subject to license terms.
24 */
25
26#ifndef	_SYS_FS_PC_NODE_H
27#define	_SYS_FS_PC_NODE_H
28
29#pragma ident	"%Z%%M%	%I%	%E% SMI"
30
31#ifdef	__cplusplus
32extern "C" {
33#endif
34
35#include <vm/page.h>
36#include <sys/buf.h>
37#include <sys/vnode.h>
38
39/*
40 * This overlays the fid structure (see vfs.h)
41 *
42 * 10 bytes max.
43 */
44struct pc_fid {
45	ushort_t	pcfid_len;
46	uint32_t	pcfid_block;	/* dblock containing directory entry */
47	uint16_t	pcfid_offset;	/* offset within block of entry */
48	uint16_t	pcfid_ctime;	/* creation time of entry (~= i_gen) */
49};
50
51struct pcnode {
52	struct pcnode	*pc_forw;	/* active list ptrs, must be first */
53	struct pcnode	*pc_back;
54	int pc_flags;			/* see below */
55	struct vnode	*pc_vn;		/* vnode for pcnode */
56	uint_t pc_size;			/* size of file */
57	pc_cluster32_t	pc_scluster;	/* starting cluster of file */
58	daddr_t pc_eblkno;		/* disk blkno for entry */
59	int pc_eoffset;			/* offset in disk block of entry */
60	struct pcdir pc_entry;		/* directory entry of file */
61	pc_cluster32_t	pc_lcluster;	/* last cluster visited */
62	daddr_t		pc_lindex;	/* index of last cluster visited */
63};
64
65/*
66 * flags
67 */
68#define	PC_MOD		0x01		/* file data has been modified */
69#define	PC_CHG		0x02		/* node data has been changed */
70#define	PC_INVAL	0x04		/* node is invalid */
71#define	PC_EXTERNAL	0x08		/* vnode ref is held externally */
72#define	PC_ACC		0x10		/* file data has been accessed */
73#define	PC_RELEHOLD	0x80		/* node is being released */
74
75#define	PCTOV(PCP)	((PCP)->pc_vn)
76#define	VTOPC(VP)	((struct pcnode *)((VP)->v_data))
77
78/*
79 * Make a unique integer for a file
80 */
81#define	pc_makenodeid(BN, OFF, ATTR, SCLUSTER, ENTPS) \
82	(ino_t)((ATTR) & PCA_DIR ? \
83		(uint32_t)(-(SCLUSTER) - 1) : \
84		((BN) * (ENTPS)) + ((OFF) / sizeof (struct pcdir)))
85
86#define	NPCHASH 1
87
88#if NPCHASH == 1
89#define	PCFHASH(FSP, BN, O)	0
90#define	PCDHASH(FSP, SC)	0
91#else
92#define	PCFHASH(FSP, BN, O)	(((unsigned)FSP + BN + O) % NPCHASH)
93#define	PCDHASH(FSP, SC)	(((unsigned)FSP + SC) % NPCHASH)
94#endif
95
96struct pchead {
97	struct pcnode *pch_forw;
98	struct pcnode *pch_back;
99};
100
101/*
102 * pcnode file and directory operations vectors
103 */
104extern struct vnodeops *pcfs_fvnodeops;
105extern struct vnodeops *pcfs_dvnodeops;
106extern const struct fs_operation_def pcfs_fvnodeops_template[];
107extern const struct fs_operation_def pcfs_dvnodeops_template[];
108extern struct pchead pcfhead[];
109extern struct pchead pcdhead[];
110
111/*
112 * pcnode routines
113 */
114extern void pc_init(void);
115extern struct pcnode *pc_getnode(struct pcfs *, daddr_t, int, struct pcdir *);
116extern void pc_rele(struct pcnode *);
117extern void pc_mark_mod(struct pcfs *, struct pcnode *);
118extern void pc_mark_acc(struct pcfs *, struct pcnode *);
119extern int pc_nodesync(struct pcnode *);
120extern int pc_nodeupdate(struct pcnode *);
121extern int pc_bmap(struct pcnode *, daddr_t, daddr_t *, uint_t *);
122
123extern int pc_balloc(struct pcnode *, daddr_t, int, daddr_t *);
124extern int pc_bfree(struct pcnode *, pc_cluster32_t);
125extern int pc_verify(struct pcfs *);
126extern void pc_diskchanged(struct pcfs *);
127extern void pc_mark_irrecov(struct pcfs *);
128
129extern int pc_dirlook(struct pcnode *, char *, struct pcnode **);
130extern int pc_direnter(struct pcnode *, char *, struct vattr *,
131	struct pcnode **);
132extern int pc_dirremove(struct pcnode *, char *, struct vnode *, enum vtype,
133		caller_context_t *);
134extern int pc_rename(struct pcnode *, struct pcnode *, char *, char *,
135		caller_context_t *);
136extern int pc_blkatoff(struct pcnode *, offset_t, struct buf **,
137	struct pcdir **);
138extern int pc_truncate(struct pcnode *, uint_t);
139extern int pc_fileclsize(struct pcfs *, pc_cluster32_t, pc_cluster32_t *);
140extern int pcfs_putapage(struct vnode *, page_t *, u_offset_t *, size_t *, int,
141	struct cred *);
142extern void pc_badfs(struct pcfs *);
143
144#ifdef	__cplusplus
145}
146#endif
147
148#endif	/* _SYS_FS_PC_NODE_H */
149