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 /* Values used to define the on-disk version of dm_attrname_t. All 22 * on-disk attribute names start with the 8-byte string "SGI_DMI_". 23 * 24 * In the on-disk inode, DMAPI attribute names consist of the user-provided 25 * name with the DMATTR_PREFIXSTRING pre-pended. This string must NEVER be 26 * changed. 27 */ 28 29 #define DMATTR_PREFIXLEN 8 30 #define DMATTR_PREFIXSTRING "SGI_DMI_" 31 32 typedef enum { 33 DM_EVENT_INVALID = -1, 34 DM_EVENT_CANCEL = 0, /* not supported */ 35 DM_EVENT_MOUNT = 1, 36 DM_EVENT_PREUNMOUNT = 2, 37 DM_EVENT_UNMOUNT = 3, 38 DM_EVENT_DEBUT = 4, /* not supported */ 39 DM_EVENT_CREATE = 5, 40 DM_EVENT_CLOSE = 6, /* not supported */ 41 DM_EVENT_POSTCREATE = 7, 42 DM_EVENT_REMOVE = 8, 43 DM_EVENT_POSTREMOVE = 9, 44 DM_EVENT_RENAME = 10, 45 DM_EVENT_POSTRENAME = 11, 46 DM_EVENT_LINK = 12, 47 DM_EVENT_POSTLINK = 13, 48 DM_EVENT_SYMLINK = 14, 49 DM_EVENT_POSTSYMLINK = 15, 50 DM_EVENT_READ = 16, 51 DM_EVENT_WRITE = 17, 52 DM_EVENT_TRUNCATE = 18, 53 DM_EVENT_ATTRIBUTE = 19, 54 DM_EVENT_DESTROY = 20, 55 DM_EVENT_NOSPACE = 21, 56 DM_EVENT_USER = 22, 57 DM_EVENT_MAX = 23 58 } dm_eventtype_t; 59 #define HAVE_DM_EVENTTYPE_T 60 61 typedef enum { 62 DM_RIGHT_NULL, 63 DM_RIGHT_SHARED, 64 DM_RIGHT_EXCL 65 } dm_right_t; 66 #define HAVE_DM_RIGHT_T 67 68 /* Defines for determining if an event message should be sent. */ 69 #ifdef HAVE_DMAPI 70 #define DM_EVENT_ENABLED(ip, event) ( \ 71 unlikely ((ip)->i_mount->m_flags & XFS_MOUNT_DMAPI) && \ 72 ( ((ip)->i_d.di_dmevmask & (1 << event)) || \ 73 ((ip)->i_mount->m_dmevmask & (1 << event)) ) \ 74 ) 75 #else 76 #define DM_EVENT_ENABLED(ip, event) (0) 77 #endif 78 79 #define DM_XFS_VALID_FS_EVENTS ( \ 80 (1 << DM_EVENT_PREUNMOUNT) | \ 81 (1 << DM_EVENT_UNMOUNT) | \ 82 (1 << DM_EVENT_NOSPACE) | \ 83 (1 << DM_EVENT_DEBUT) | \ 84 (1 << DM_EVENT_CREATE) | \ 85 (1 << DM_EVENT_POSTCREATE) | \ 86 (1 << DM_EVENT_REMOVE) | \ 87 (1 << DM_EVENT_POSTREMOVE) | \ 88 (1 << DM_EVENT_RENAME) | \ 89 (1 << DM_EVENT_POSTRENAME) | \ 90 (1 << DM_EVENT_LINK) | \ 91 (1 << DM_EVENT_POSTLINK) | \ 92 (1 << DM_EVENT_SYMLINK) | \ 93 (1 << DM_EVENT_POSTSYMLINK) | \ 94 (1 << DM_EVENT_ATTRIBUTE) | \ 95 (1 << DM_EVENT_DESTROY) ) 96 97 /* Events valid in dm_set_eventlist() when called with a file handle for 98 a regular file or a symlink. These events are persistent. 99 */ 100 101 #define DM_XFS_VALID_FILE_EVENTS ( \ 102 (1 << DM_EVENT_ATTRIBUTE) | \ 103 (1 << DM_EVENT_DESTROY) ) 104 105 /* Events valid in dm_set_eventlist() when called with a file handle for 106 a directory. These events are persistent. 107 */ 108 109 #define DM_XFS_VALID_DIRECTORY_EVENTS ( \ 110 (1 << DM_EVENT_CREATE) | \ 111 (1 << DM_EVENT_POSTCREATE) | \ 112 (1 << DM_EVENT_REMOVE) | \ 113 (1 << DM_EVENT_POSTREMOVE) | \ 114 (1 << DM_EVENT_RENAME) | \ 115 (1 << DM_EVENT_POSTRENAME) | \ 116 (1 << DM_EVENT_LINK) | \ 117 (1 << DM_EVENT_POSTLINK) | \ 118 (1 << DM_EVENT_SYMLINK) | \ 119 (1 << DM_EVENT_POSTSYMLINK) | \ 120 (1 << DM_EVENT_ATTRIBUTE) | \ 121 (1 << DM_EVENT_DESTROY) ) 122 123 /* Events supported by the XFS filesystem. */ 124 #define DM_XFS_SUPPORTED_EVENTS ( \ 125 (1 << DM_EVENT_MOUNT) | \ 126 (1 << DM_EVENT_PREUNMOUNT) | \ 127 (1 << DM_EVENT_UNMOUNT) | \ 128 (1 << DM_EVENT_NOSPACE) | \ 129 (1 << DM_EVENT_CREATE) | \ 130 (1 << DM_EVENT_POSTCREATE) | \ 131 (1 << DM_EVENT_REMOVE) | \ 132 (1 << DM_EVENT_POSTREMOVE) | \ 133 (1 << DM_EVENT_RENAME) | \ 134 (1 << DM_EVENT_POSTRENAME) | \ 135 (1 << DM_EVENT_LINK) | \ 136 (1 << DM_EVENT_POSTLINK) | \ 137 (1 << DM_EVENT_SYMLINK) | \ 138 (1 << DM_EVENT_POSTSYMLINK) | \ 139 (1 << DM_EVENT_READ) | \ 140 (1 << DM_EVENT_WRITE) | \ 141 (1 << DM_EVENT_TRUNCATE) | \ 142 (1 << DM_EVENT_ATTRIBUTE) | \ 143 (1 << DM_EVENT_DESTROY) ) 144 145 146 /* 147 * Definitions used for the flags field on dm_send_*_event(). 148 */ 149 150 #define DM_FLAGS_NDELAY 0x001 /* return EAGAIN after dm_pending() */ 151 #define DM_FLAGS_UNWANTED 0x002 /* event not in fsys dm_eventset_t */ 152 #define DM_FLAGS_IMUX 0x004 /* thread holds i_mutex */ 153 #define DM_FLAGS_IALLOCSEM_RD 0x010 /* thread holds i_alloc_sem rd */ 154 #define DM_FLAGS_IALLOCSEM_WR 0x020 /* thread holds i_alloc_sem wr */ 155 156 /* 157 * Pull in platform specific event flags defines 158 */ 159 #include "xfs_dmapi_priv.h" 160 161 /* 162 * Macros to turn caller specified delay/block flags into 163 * dm_send_xxxx_event flag DM_FLAGS_NDELAY. 164 */ 165 166 #define FILP_DELAY_FLAG(filp) ((filp->f_flags&(O_NDELAY|O_NONBLOCK)) ? \ 167 DM_FLAGS_NDELAY : 0) 168 #define AT_DELAY_FLAG(f) ((f & XFS_ATTR_NONBLOCK) ? DM_FLAGS_NDELAY : 0) 169 170 #endif /* __XFS_DMAPI_H__ */ 171