xref: /titanic_41/usr/src/uts/common/sys/lvm/md_names.h (revision 32c22d57860198538fb6b8f261cb76ab26318d34)
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 (c) 1992, 2010, Oracle and/or its affiliates. All rights reserved.
23  */
24 
25 #ifndef	_SYS_MD_NAMES_H
26 #define	_SYS_MD_NAMES_H
27 
28 #ifdef	__cplusplus
29 extern "C" {
30 #endif
31 
32 #define	NM_ALLOC_SIZE	512
33 #define	NM_DID_ALLOC_SIZE	1024
34 
35 #define	NM_NOCOMMIT	0x0100
36 #define	NM_SHARED	1
37 #define	NM_NOTSHARED	0
38 #define	NM_DEVID	0x0010
39 #define	NM_IMP_SHARED	0x0020
40 #define	NM_KEY_RECYCLE	0x0040
41 #define	NM_DEVID_VALID		1
42 #define	NM_DEVID_INVALID	0
43 
44 #if _LONG_LONG_ALIGNMENT == 8 && _LONG_LONG_ALIGNMENT_32 == 4
45 #pragma pack(4)
46 #endif
47 
48 #ifdef _KERNEL
49 struct nm_rec_hdr {
50 	uint_t		r_revision;	/* revision number */
51 	uint_t		r_alloc_size;	/* alloc'd record size */
52 	uint_t		r_used_size;	/* number bytes used */
53 	mddb_recid_t	r_next_recid;	/* record id of next record */
54 	uint32_t	xr_next_rec;	/* ptr to record, calc at boot */
55 	mdkey_t		r_next_key;	/* Next key for alloc'd entry */
56 };
57 #else /* ! _KERNEL */
58 struct nm_rec_hdr {
59 	uint_t		r_revision;	/* revision number */
60 	uint_t		r_alloc_size;	/* alloc'd record size */
61 	uint_t		r_used_size;	/* number bytes used */
62 	mddb_recid_t	r_next_recid;	/* record id of next record */
63 	void		*r_next_rec;	/* ptr to record, calc at boot */
64 	mdkey_t		r_next_key;	/* Next key for alloc'd entry */
65 };
66 #endif /* _KERNEL */
67 
68 struct nm_next_hdr {
69 	struct nm_next_hdr	*nmn_nextp;
70 	void			*nmn_record;
71 };
72 
73 struct nm_shr_rec {
74 	struct nm_rec_hdr	sr_rec_hdr;	/* Record header */
75 	struct	nm_shared_name {
76 		mdkey_t	sn_key;		/* Unique key for this name */
77 		uint32_t sn_count;	/* Count of users of this name */
78 		uint32_t sn_data;	/* Data ptr for users (e.g., devops */
79 					/* sn_data NOT USED anywhere */
80 		ushort_t sn_namlen;	/* Length of string in nmsn_name */
81 		char	sn_name[1];	/* Driver/Directory name */
82 	} sr_name[1];
83 };
84 
85 #define	SHR_NAMSIZ(n) \
86 	(((sizeof (struct nm_shared_name) - 1) + \
87 	    (n)->sn_namlen + (sizeof (uint_t) - 1)) & ~(sizeof (uint_t) - 1))
88 
89 struct nm_rec {
90 	struct nm_rec_hdr	r_rec_hdr;	/* Record header */
91 	struct nm_name {
92 		side_t	n_side;		/* (key 1) side associated with */
93 		mdkey_t	n_key;		/* (key 2) allocated unique key */
94 		uint32_t n_count;	/* reference count */
95 		minor_t	n_minor;	/* minor number of device */
96 		mdkey_t	n_drv_key;	/* Key of driver name in nm_shared */
97 		mdkey_t	n_dir_key;	/* Key of dir. name in nm_shared */
98 		ushort_t n_namlen;	/* Length of string in nme_name */
99 		char	n_name[1];	/* Filename of device is here */
100 	} r_name[1];
101 };
102 
103 #define	NAMSIZ(n) \
104 	(((sizeof (struct nm_name) - 1) + \
105 	    (n)->n_namlen + (sizeof (uint_t) - 1)) & ~(sizeof (uint_t) - 1))
106 
107 /*
108  * Device id support
109  */
110 struct devid_shr_rec {
111 	struct nm_rec_hdr	did_rec_hdr;
112 	struct did_shr_name {
113 		mdkey_t	did_key;
114 		uint32_t did_count;
115 		uint32_t did_data;
116 		ushort_t did_size;
117 		char	did_devid[1];
118 	} device_id[1];
119 };
120 
121 #define	DID_SHR_NAMSIZ(n) \
122 	(((sizeof (struct did_shr_name) - 1) + \
123 	    (n)->did_size + (sizeof (uint_t) - 1)) & ~(sizeof (uint_t) - 1))
124 
125 
126 struct devid_min_rec {
127 	struct nm_rec_hdr	min_rec_hdr;
128 	struct did_min_name {
129 		side_t	min_side;
130 		mdkey_t	min_key;
131 		uint32_t min_count;
132 		mdkey_t	min_devid_key;
133 		ushort_t min_namlen;
134 		char	min_name[1];
135 	} minor_name[1];
136 };
137 
138 #define	DID_NAMSIZ(n) \
139 	(((sizeof (struct did_min_name) - 1) + \
140 	    (n)->min_namlen + (sizeof (uint_t) - 1)) & ~(sizeof (uint_t) - 1))
141 
142 
143 struct nm_header {
144 	uint_t			h_revision;	/* revision number */
145 	struct nm_rec_hdr	h_names;	/* device-name structures */
146 	struct nm_rec_hdr	h_shared;	/* shared structures */
147 };
148 
149 struct nm_header_hdr {
150 	struct nm_header	*hh_header;
151 	struct nm_next_hdr	hh_names;
152 	struct nm_next_hdr	hh_shared;
153 };
154 
155 #if _LONG_LONG_ALIGNMENT == 8 && _LONG_LONG_ALIGNMENT_32 == 4
156 #pragma pack()
157 #endif
158 
159 #ifdef	__cplusplus
160 }
161 #endif
162 
163 #endif	/* _SYS_MD_NAMES_H */
164