1/* 2 * Copyright (c) 2000-2005 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18#ifndef __XFS_DMAPI_H__ 19#define __XFS_DMAPI_H__ 20 21#include <linux/version.h> 22/* Values used to define the on-disk version of dm_attrname_t. All 23 * on-disk attribute names start with the 8-byte string "SGI_DMI_". 24 * 25 * In the on-disk inode, DMAPI attribute names consist of the user-provided 26 * name with the DMATTR_PREFIXSTRING pre-pended. This string must NEVER be 27 * changed. 28 */ 29 30#define DMATTR_PREFIXLEN 8 31#define DMATTR_PREFIXSTRING "SGI_DMI_" 32 33typedef enum { 34 DM_EVENT_INVALID = -1, 35 DM_EVENT_CANCEL = 0, /* not supported */ 36 DM_EVENT_MOUNT = 1, 37 DM_EVENT_PREUNMOUNT = 2, 38 DM_EVENT_UNMOUNT = 3, 39 DM_EVENT_DEBUT = 4, /* not supported */ 40 DM_EVENT_CREATE = 5, 41 DM_EVENT_CLOSE = 6, /* not supported */ 42 DM_EVENT_POSTCREATE = 7, 43 DM_EVENT_REMOVE = 8, 44 DM_EVENT_POSTREMOVE = 9, 45 DM_EVENT_RENAME = 10, 46 DM_EVENT_POSTRENAME = 11, 47 DM_EVENT_LINK = 12, 48 DM_EVENT_POSTLINK = 13, 49 DM_EVENT_SYMLINK = 14, 50 DM_EVENT_POSTSYMLINK = 15, 51 DM_EVENT_READ = 16, 52 DM_EVENT_WRITE = 17, 53 DM_EVENT_TRUNCATE = 18, 54 DM_EVENT_ATTRIBUTE = 19, 55 DM_EVENT_DESTROY = 20, 56 DM_EVENT_NOSPACE = 21, 57 DM_EVENT_USER = 22, 58 DM_EVENT_MAX = 23 59} dm_eventtype_t; 60#define HAVE_DM_EVENTTYPE_T 61 62typedef enum { 63 DM_RIGHT_NULL, 64 DM_RIGHT_SHARED, 65 DM_RIGHT_EXCL 66} dm_right_t; 67#define HAVE_DM_RIGHT_T 68 69/* Defines for determining if an event message should be sent. */ 70#define DM_EVENT_ENABLED(vfsp, ip, event) ( \ 71 unlikely ((vfsp)->vfs_flag & VFS_DMI) && \ 72 ( ((ip)->i_d.di_dmevmask & (1 << event)) || \ 73 ((ip)->i_mount->m_dmevmask & (1 << event)) ) \ 74 ) 75 76#define DM_EVENT_ENABLED_IO(vfsp, io, event) ( \ 77 unlikely ((vfsp)->vfs_flag & VFS_DMI) && \ 78 ( ((io)->io_dmevmask & (1 << event)) || \ 79 ((io)->io_mount->m_dmevmask & (1 << event)) ) \ 80 ) 81 82#define DM_XFS_VALID_FS_EVENTS ( \ 83 (1 << DM_EVENT_PREUNMOUNT) | \ 84 (1 << DM_EVENT_UNMOUNT) | \ 85 (1 << DM_EVENT_NOSPACE) | \ 86 (1 << DM_EVENT_DEBUT) | \ 87 (1 << DM_EVENT_CREATE) | \ 88 (1 << DM_EVENT_POSTCREATE) | \ 89 (1 << DM_EVENT_REMOVE) | \ 90 (1 << DM_EVENT_POSTREMOVE) | \ 91 (1 << DM_EVENT_RENAME) | \ 92 (1 << DM_EVENT_POSTRENAME) | \ 93 (1 << DM_EVENT_LINK) | \ 94 (1 << DM_EVENT_POSTLINK) | \ 95 (1 << DM_EVENT_SYMLINK) | \ 96 (1 << DM_EVENT_POSTSYMLINK) | \ 97 (1 << DM_EVENT_ATTRIBUTE) | \ 98 (1 << DM_EVENT_DESTROY) ) 99 100/* Events valid in dm_set_eventlist() when called with a file handle for 101 a regular file or a symlink. These events are persistent. 102*/ 103 104#define DM_XFS_VALID_FILE_EVENTS ( \ 105 (1 << DM_EVENT_ATTRIBUTE) | \ 106 (1 << DM_EVENT_DESTROY) ) 107 108/* Events valid in dm_set_eventlist() when called with a file handle for 109 a directory. These events are persistent. 110*/ 111 112#define DM_XFS_VALID_DIRECTORY_EVENTS ( \ 113 (1 << DM_EVENT_CREATE) | \ 114 (1 << DM_EVENT_POSTCREATE) | \ 115 (1 << DM_EVENT_REMOVE) | \ 116 (1 << DM_EVENT_POSTREMOVE) | \ 117 (1 << DM_EVENT_RENAME) | \ 118 (1 << DM_EVENT_POSTRENAME) | \ 119 (1 << DM_EVENT_LINK) | \ 120 (1 << DM_EVENT_POSTLINK) | \ 121 (1 << DM_EVENT_SYMLINK) | \ 122 (1 << DM_EVENT_POSTSYMLINK) | \ 123 (1 << DM_EVENT_ATTRIBUTE) | \ 124 (1 << DM_EVENT_DESTROY) ) 125 126/* Events supported by the XFS filesystem. */ 127#define DM_XFS_SUPPORTED_EVENTS ( \ 128 (1 << DM_EVENT_MOUNT) | \ 129 (1 << DM_EVENT_PREUNMOUNT) | \ 130 (1 << DM_EVENT_UNMOUNT) | \ 131 (1 << DM_EVENT_NOSPACE) | \ 132 (1 << DM_EVENT_CREATE) | \ 133 (1 << DM_EVENT_POSTCREATE) | \ 134 (1 << DM_EVENT_REMOVE) | \ 135 (1 << DM_EVENT_POSTREMOVE) | \ 136 (1 << DM_EVENT_RENAME) | \ 137 (1 << DM_EVENT_POSTRENAME) | \ 138 (1 << DM_EVENT_LINK) | \ 139 (1 << DM_EVENT_POSTLINK) | \ 140 (1 << DM_EVENT_SYMLINK) | \ 141 (1 << DM_EVENT_POSTSYMLINK) | \ 142 (1 << DM_EVENT_READ) | \ 143 (1 << DM_EVENT_WRITE) | \ 144 (1 << DM_EVENT_TRUNCATE) | \ 145 (1 << DM_EVENT_ATTRIBUTE) | \ 146 (1 << DM_EVENT_DESTROY) ) 147 148 149/* 150 * Definitions used for the flags field on dm_send_*_event(). 151 */ 152 153#define DM_FLAGS_NDELAY 0x001 /* return EAGAIN after dm_pending() */ 154#define DM_FLAGS_UNWANTED 0x002 /* event not in fsys dm_eventset_t */ 155#define DM_FLAGS_IMUX 0x004 /* thread holds i_mutex */ 156#define DM_FLAGS_IALLOCSEM_RD 0x010 /* thread holds i_alloc_sem rd */ 157#define DM_FLAGS_IALLOCSEM_WR 0x020 /* thread holds i_alloc_sem wr */ 158 159/* 160 * Pull in platform specific event flags defines 161 */ 162#include "xfs_dmapi_priv.h" 163 164/* 165 * Macros to turn caller specified delay/block flags into 166 * dm_send_xxxx_event flag DM_FLAGS_NDELAY. 167 */ 168 169#define FILP_DELAY_FLAG(filp) ((filp->f_flags&(O_NDELAY|O_NONBLOCK)) ? \ 170 DM_FLAGS_NDELAY : 0) 171#define AT_DELAY_FLAG(f) ((f&ATTR_NONBLOCK) ? DM_FLAGS_NDELAY : 0) 172 173 174extern struct bhv_module_vfsops xfs_dmops; 175 176#endif /* __XFS_DMAPI_H__ */ 177