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OS-4043 tmpfs should support gigabyte sizes
OS-4044 tmpfs should support "mode" option
Reviewed by: Robert Mustacchi <rm@joyent.com>
Reviewed by: Patrick Mooney <patrick.mooney@joyent.com>
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--- old/usr/src/uts/common/sys/fs/tmp.h
+++ new/usr/src/uts/common/sys/fs/tmp.h
1 1 /*
2 2 * CDDL HEADER START
3 3 *
4 4 * The contents of this file are subject to the terms of the
5 5 * Common Development and Distribution License (the "License").
6 6 * You may not use this file except in compliance with the License.
7 7 *
8 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 9 * or http://www.opensolaris.org/os/licensing.
10 10 * See the License for the specific language governing permissions
11 11 * and limitations under the License.
12 12 *
13 13 * When distributing Covered Code, include this CDDL HEADER in each
14 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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15 15 * If applicable, add the following below this CDDL HEADER, with the
16 16 * fields enclosed by brackets "[]" replaced with your own identifying
17 17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 18 *
19 19 * CDDL HEADER END
20 20 */
21 21 /*
22 22 * Copyright 2007 Sun Microsystems, Inc.
23 23 * All rights reserved. Use is subject to license terms.
24 24 */
25 +/*
26 + * Copyright 2015 Joyent, Inc.
27 + */
25 28
26 29 #ifndef _SYS_FS_TMP_H
27 30 #define _SYS_FS_TMP_H
28 31
29 -#pragma ident "%Z%%M% %I% %E% SMI"
30 -
31 32 #ifdef __cplusplus
32 33 extern "C" {
33 34 #endif
34 35
35 36 /*
36 37 * tmpfs per-mount data structure.
37 38 *
38 39 * All fields are protected by tm_contents.
39 40 * File renames on a particular file system are protected tm_renamelck.
40 41 */
41 42 struct tmount {
42 43 struct vfs *tm_vfsp; /* filesystem's vfs struct */
43 44 struct tmpnode *tm_rootnode; /* root tmpnode */
44 45 char *tm_mntpath; /* name of tmpfs mount point */
45 46 ulong_t tm_anonmax; /* file system max anon reservation */
46 47 pgcnt_t tm_anonmem; /* pages of reserved anon memory */
47 48 dev_t tm_dev; /* unique dev # of mounted `device' */
48 49 uint_t tm_gen; /* pseudo generation number for files */
49 50 kmutex_t tm_contents; /* lock for tmount structure */
50 51 kmutex_t tm_renamelck; /* rename lock for this mount */
51 52 };
52 53
53 54 /*
54 55 * File system independent to tmpfs conversion macros
55 56 */
56 57 #define VFSTOTM(vfsp) ((struct tmount *)(vfsp)->vfs_data)
57 58 #define VTOTM(vp) ((struct tmount *)(vp)->v_vfsp->vfs_data)
58 59 #define VTOTN(vp) ((struct tmpnode *)(vp)->v_data)
59 60 #define TNTOV(tp) ((tp)->tn_vnode)
60 61 #define tmpnode_hold(tp) VN_HOLD(TNTOV(tp))
61 62 #define tmpnode_rele(tp) VN_RELE(TNTOV(tp))
62 63
63 64 /*
64 65 * enums
65 66 */
66 67 enum de_op { DE_CREATE, DE_MKDIR, DE_LINK, DE_RENAME }; /* direnter ops */
67 68 enum dr_op { DR_REMOVE, DR_RMDIR, DR_RENAME }; /* dirremove ops */
68 69
69 70 /*
70 71 * tmpfs_minfree is the amount (in pages) of anonymous memory that tmpfs
71 72 * leaves free for the rest of the system. E.g. in a system with 32MB of
72 73 * configured swap space, if 16MB were reserved (leaving 16MB free),
73 74 * tmpfs could allocate up to 16MB - tmpfs_minfree. The default value
74 75 * for tmpfs_minfree is btopr(TMPMINFREE) but it can cautiously patched
75 76 * to a different number of pages.
76 77 * NB: If tmpfs allocates too much swap space, other processes will be
77 78 * unable to execute.
78 79 */
79 80 #define TMPMINFREE 2 * 1024 * 1024 /* 2 Megabytes */
80 81
81 82 extern size_t tmpfs_minfree; /* Anonymous memory in pages */
82 83
83 84 /*
84 85 * tmpfs can allocate only a certain percentage of kernel memory,
85 86 * which is used for tmpnodes, directories, file names, etc.
86 87 * This is statically set as TMPMAXFRACKMEM of physical memory.
87 88 * The actual number of allocatable bytes can be patched in tmpfs_maxkmem.
88 89 */
89 90 #define TMPMAXFRACKMEM 25 /* 1/25 of physical memory */
90 91
91 92 extern size_t tmp_kmemspace;
92 93 extern size_t tmpfs_maxkmem; /* Allocatable kernel memory in bytes */
93 94
94 95 extern void tmpnode_init(struct tmount *, struct tmpnode *,
95 96 struct vattr *, struct cred *);
96 97 extern int tmpnode_trunc(struct tmount *, struct tmpnode *, ulong_t);
97 98 extern void tmpnode_growmap(struct tmpnode *, ulong_t);
98 99 extern int tdirlookup(struct tmpnode *, char *, struct tmpnode **,
99 100 struct cred *);
100 101 extern int tdirdelete(struct tmpnode *, struct tmpnode *, char *,
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101 102 enum dr_op, struct cred *);
102 103 extern void tdirinit(struct tmpnode *, struct tmpnode *);
103 104 extern void tdirtrunc(struct tmpnode *);
104 105 extern void *tmp_memalloc(size_t, int);
105 106 extern void tmp_memfree(void *, size_t);
106 107 extern int tmp_resv(struct tmount *, struct tmpnode *, size_t, int);
107 108 extern int tmp_taccess(void *, int, struct cred *);
108 109 extern int tmp_sticky_remove_access(struct tmpnode *, struct tmpnode *,
109 110 struct cred *);
110 111 extern int tmp_convnum(char *, pgcnt_t *);
112 +extern int tmp_convmode(char *, mode_t *);
111 113 extern int tdirenter(struct tmount *, struct tmpnode *, char *,
112 114 enum de_op, struct tmpnode *, struct tmpnode *, struct vattr *,
113 115 struct tmpnode **, struct cred *, caller_context_t *);
114 116
115 117 #define TMP_MUSTHAVE 0x01
116 118
117 119 #ifdef __cplusplus
118 120 }
119 121 #endif
120 122
121 123 #endif /* _SYS_FS_TMP_H */
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