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 2009 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#ifdef	__cplusplus
30extern "C" {
31#endif
32
33#include <vm/page.h>
34#include <sys/buf.h>
35#include <sys/vnode.h>
36
37#ifdef _KERNEL
38#include <sys/vfs_opreg.h>
39#endif
40
41/*
42 * This overlays the fid structure (see vfs.h)
43 *
44 * 10 bytes max.
45 */
46struct pc_fid {
47	ushort_t	pcfid_len;
48	uint32_t	pcfid_block;	/* dblock containing directory entry */
49	uint16_t	pcfid_offset;	/* offset within block of entry */
50	uint16_t	pcfid_ctime;	/* creation time of entry (~= i_gen) */
51};
52
53struct pcnode {
54	struct pcnode	*pc_forw;	/* active list ptrs, must be first */
55	struct pcnode	*pc_back;
56	int pc_flags;			/* see below */
57	struct vnode	*pc_vn;		/* vnode for pcnode */
58	uint_t pc_size;			/* size of file */
59	pc_cluster32_t	pc_scluster;	/* starting cluster of file */
60	daddr_t pc_eblkno;		/* disk blkno for entry */
61	int pc_eoffset;			/* offset in disk block of entry */
62	struct pcdir pc_entry;		/* directory entry of file */
63	pc_cluster32_t	pc_lcluster;	/* last cluster visited */
64	daddr_t		pc_lindex;	/* index of last cluster visited */
65};
66
67/*
68 * flags
69 */
70#define	PC_MOD		0x01		/* file data has been modified */
71#define	PC_CHG		0x02		/* node data has been changed */
72#define	PC_INVAL	0x04		/* node is invalid */
73#define	PC_EXTERNAL	0x08		/* vnode ref is held externally */
74#define	PC_ACC		0x10		/* file data has been accessed */
75#define	PC_RELEHOLD	0x80		/* node is being released */
76
77#define	PCTOV(PCP)	((PCP)->pc_vn)
78#define	VTOPC(VP)	((struct pcnode *)((VP)->v_data))
79
80/*
81 * Make a unique integer for a file
82 */
83#define	pc_makenodeid(BN, OFF, ATTR, SCLUSTER, ENTPS) \
84	(ino_t)((ATTR) & PCA_DIR ? \
85		(uint32_t)(-(SCLUSTER) - 1) : \
86		((BN) * (ENTPS)) + ((OFF) / sizeof (struct pcdir)))
87
88#define	NPCHASH 1
89
90#if NPCHASH == 1
91#define	PCFHASH(FSP, BN, O)	0
92#define	PCDHASH(FSP, SC)	0
93#else
94#define	PCFHASH(FSP, BN, O)	(((unsigned)FSP + BN + O) % NPCHASH)
95#define	PCDHASH(FSP, SC)	(((unsigned)FSP + SC) % NPCHASH)
96#endif
97
98struct pchead {
99	struct pcnode *pch_forw;
100	struct pcnode *pch_back;
101};
102
103/*
104 * pcnode file and directory operations vectors
105 */
106extern struct vnodeops *pcfs_fvnodeops;
107extern struct vnodeops *pcfs_dvnodeops;
108
109#ifdef _KERNEL
110extern const struct fs_operation_def pcfs_fvnodeops_template[];
111extern const struct fs_operation_def pcfs_dvnodeops_template[];
112#endif
113
114extern struct pchead pcfhead[];
115extern struct pchead pcdhead[];
116
117/*
118 * pcnode routines
119 */
120extern void pc_init(void);
121extern struct pcnode *pc_getnode(struct pcfs *, daddr_t, int, struct pcdir *);
122extern void pc_rele(struct pcnode *);
123extern void pc_mark_mod(struct pcfs *, struct pcnode *);
124extern void pc_mark_acc(struct pcfs *, struct pcnode *);
125extern int pc_nodesync(struct pcnode *);
126extern int pc_nodeupdate(struct pcnode *);
127extern int pc_bmap(struct pcnode *, daddr_t, daddr_t *, uint_t *);
128
129extern int pc_balloc(struct pcnode *, daddr_t, int, daddr_t *);
130extern int pc_bfree(struct pcnode *, pc_cluster32_t);
131extern int pc_verify(struct pcfs *);
132extern void pc_diskchanged(struct pcfs *);
133extern void pc_mark_irrecov(struct pcfs *);
134
135extern int pc_dirlook(struct pcnode *, char *, struct pcnode **);
136extern int pc_direnter(struct pcnode *, char *, struct vattr *,
137	struct pcnode **);
138extern int pc_dirremove(struct pcnode *, char *, struct vnode *, enum vtype,
139		caller_context_t *);
140extern int pc_rename(struct pcnode *, struct pcnode *, char *, char *,
141		caller_context_t *);
142extern int pc_blkatoff(struct pcnode *, offset_t, struct buf **,
143	struct pcdir **);
144extern int pc_truncate(struct pcnode *, uint_t);
145extern int pc_fileclsize(struct pcfs *, pc_cluster32_t, pc_cluster32_t *);
146extern int pcfs_putapage(struct vnode *, page_t *, u_offset_t *, size_t *, int,
147	struct cred *);
148extern void pc_badfs(struct pcfs *);
149
150#ifdef	__cplusplus
151}
152#endif
153
154#endif	/* _SYS_FS_PC_NODE_H */
155