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 2010 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _SYS_MNTFS_MNTDATA_H 27 #define _SYS_MNTFS_MNTDATA_H 28 29 #include <sys/vnode.h> 30 #include <sys/poll.h> 31 #include <sys/mnttab.h> 32 33 #ifdef __cplusplus 34 extern "C" { 35 #endif 36 37 typedef struct mntelem { 38 /* Metadata. */ 39 struct mntelem *mnte_next; 40 struct mntelem *mnte_prev; 41 timespec_t mnte_birth; 42 timespec_t mnte_death; 43 timespec_t mnte_vfs_ctime; 44 int mnte_refcnt; 45 /* Payload. */ 46 int mnte_hidden; 47 char *mnte_text; 48 size_t mnte_text_size; 49 struct extmnttab mnte_tab; 50 } mntelem_t; 51 52 typedef struct mntsnap { 53 timespec_t mnts_time; /* Time of this snapshot. */ 54 timespec_t mnts_last_mtime; /* mnttab modification time. */ 55 mntelem_t *mnts_first; /* First element in this snapshot. */ 56 mntelem_t *mnts_next; /* Next element to use. */ 57 int mnts_flags; /* flags; see below. */ 58 size_t mnts_nmnts; /* # of elements in this snapshot. */ 59 size_t mnts_text_size; /* Text size for this snapshot. */ 60 size_t mnts_foffset; /* File offset of last read(). */ 61 size_t mnts_ieoffset; /* Offset of last read() in element. */ 62 } mntsnap_t; 63 64 typedef struct mntnode { 65 vnode_t *mnt_vnode; /* vnode for this mntnode */ 66 vnode_t *mnt_mountvp; /* vnode mounted on */ 67 krwlock_t mnt_contents; /* protects mnt_flags, mnt_read & mnt_ioctl */ 68 uint_t mnt_flags; /* flags; see below */ 69 mntsnap_t mnt_read; /* data for read() */ 70 mntsnap_t mnt_ioctl; /* data for ioctl() */ 71 } mntnode_t; 72 73 struct zone; 74 75 typedef struct mntdata { 76 struct zone *mnt_zone; /* zone for mount point */ 77 uint_t mnt_nopen; /* count of vnodes open */ 78 size_t mnt_size; /* size of last normal snapshot */ 79 size_t mnt_hidden_size; /* size of last hidden snapshot */ 80 timespec_t mnt_mtime; /* mtime at last normal snapshot */ 81 timespec_t mnt_hidden_mtime; /* mtime at last hidden snapshot */ 82 struct mntnode mnt_node; /* embedded mntnode */ 83 } mntdata_t; 84 85 /* 86 * Conversion macros. 87 */ 88 #define VTOM(vp) ((struct mntnode *)(vp)->v_data) 89 #define MTOV(pnp) ((pnp)->mnt_vnode) 90 #define MTOD(pnp) ((struct mntdata *)MTOV(pnp)->v_vfsp->vfs_data) 91 92 #define MNTFS_ELEM_IS_DEAD(x) ((x)->mnte_death.tv_sec || \ 93 (x)->mnte_death.tv_nsec) 94 #define MNTFS_ELEM_IS_ALIVE(x) !MNTFS_ELEM_IS_DEAD(x) 95 96 #if defined(_KERNEL) 97 98 /* 99 * Value for a mntsnap_t's mnts_flags. 100 */ 101 #define MNTS_SHOWHIDDEN 0x1 /* This snapshot contains hidden mounts. */ 102 #define MNTS_REWIND 0x2 /* This snapshot must be refreshed. */ 103 /* 104 * Values for a mntnode_t's mnt_flags. 105 */ 106 #define MNT_SHOWHIDDEN 0x1 /* Include MS_NOMNTTAB mounts in snapshots. */ 107 108 extern struct vnodeops *mntvnodeops; 109 extern void mntfs_getmntopts(struct vfs *, char **, size_t *); 110 111 #endif /* _KERNEL */ 112 113 #ifdef __cplusplus 114 } 115 #endif 116 117 #endif /* _SYS_MNTFS_MNTDATA_H */ 118