1 #ifndef __ZEV_H__ 2 #define __ZEV_H__ 3 4 #include <sys/types.h> 5 6 #ifdef _KERNEL 7 #include <sys/dmu_objset.h> 8 #include <sys/dsl_dataset.h> 9 #include <sys/zfs_vfsops.h> 10 #include <sys/dsl_dir.h> 11 #include <sys/spa_impl.h> 12 #endif 13 14 #define ZEVIOC ('z' << 8) 15 #define ZEV_IOC_GET_STATISTICS (ZEVIOC | 1) /* get zev statistics */ 16 #define ZEV_IOC_MUTE_POOL (ZEVIOC | 2) /* no events for pool */ 17 #define ZEV_IOC_UNMUTE_POOL (ZEVIOC | 3) /* send pool events */ 18 #define ZEV_IOC_SET_MAX_QUEUE_LEN (ZEVIOC | 4) /* when to block ops */ 19 #define ZEV_IOC_SET_POLL_WAKEUP_QUEUE_LEN (ZEVIOC | 5) /* poll throttle */ 20 #define ZEV_IOC_MARK (ZEVIOC | 6) /* add mark to queue */ 21 #define ZEV_IOC_GET_GEN (ZEVIOC | 7) /* get generation no. */ 22 23 #define ZEV_OP_MIN 1 24 #define ZEV_OP_ERROR 1 25 #define ZEV_OP_MARK 2 26 #define ZEV_OP_ZFS_MOUNT 3 27 #define ZEV_OP_ZFS_UMOUNT 4 28 #define ZEV_OP_ZVOL_WRITE 5 29 #define ZEV_OP_ZVOL_TRUNCATE 6 30 #define ZEV_OP_ZNODE_CLOSE_AFTER_UPDATE 7 31 #define ZEV_OP_ZNODE_CREATE 8 32 #define ZEV_OP_ZNODE_MKDIR 9 33 #define ZEV_OP_ZNODE_MAKE_XATTR_DIR 10 34 #define ZEV_OP_ZNODE_REMOVE 11 35 #define ZEV_OP_ZNODE_RMDIR 12 36 #define ZEV_OP_ZNODE_LINK 13 37 #define ZEV_OP_ZNODE_SYMLINK 14 38 #define ZEV_OP_ZNODE_RENAME 15 39 #define ZEV_OP_ZNODE_WRITE 16 40 #define ZEV_OP_ZNODE_TRUNCATE 17 41 #define ZEV_OP_ZNODE_SETATTR 18 42 #define ZEV_OP_ZNODE_ACL 19 43 #define ZEV_OP_MAX 19 44 45 #define ZEV_FL_XATTR 0x1 46 47 /* zfs event records (as they are represented through the character device) */ 48 49 #pragma pack(1) 50 typedef struct zev_inode_info_t { 51 uint64_t ino; 52 uint64_t gen; 53 uint64_t mtime; 54 uint64_t ctime; 55 uint64_t size; 56 uint64_t mode; 57 uint64_t links; 58 uint32_t type; 59 uint32_t flags; 60 } zev_inode_info_t; 61 62 #define ZEV_ERRSTR(rec) ((char *)(rec + 1)) 63 #define ZEV_DATASET(rec) ((char *)(rec + 1)) 64 #define ZEV_MOUNTPOINT(rec) (((char *)(rec + 1)) + rec->dataset_len + 1) 65 #define ZEV_NAME(rec) ((char *)(rec + 1)) 66 #define ZEV_SRCNAME(rec) ((char *)(rec + 1)) 67 #define ZEV_DSTNAME(rec) (((char *)(rec + 1)) + rec->srcname_len + 1) 68 #define ZEV_LINK(rec) (((char *)(rec + 1)) + rec->name_len + 1) 69 #define ZEV_PAYLOAD(rec) ((char *)(rec + 1)) 70 71 #define ZEV_COMMON_FIELDS \ 72 uint32_t record_len; \ 73 uint32_t op; \ 74 uint64_t op_time; \ 75 uint64_t guid 76 77 typedef struct zev_header_t { 78 ZEV_COMMON_FIELDS; 79 } zev_header_t; 80 81 typedef struct zev_error_t { 82 ZEV_COMMON_FIELDS; 83 uint32_t failed_op; 84 uint32_t errstr_len; 85 /* error string follows */ 86 } zev_error_t; 87 88 typedef struct zev_mark_t { 89 ZEV_COMMON_FIELDS; 90 uint64_t mark_id; 91 uint32_t payload_len; 92 uint32_t padding; 93 /* payload follows */ 94 } zev_mark_t; 95 96 typedef struct zev_zfs_mount_t { 97 ZEV_COMMON_FIELDS; 98 uint64_t root_ino; 99 uint32_t remount; 100 uint32_t dataset_len; 101 uint32_t mountpoint_len; 102 uint32_t padding; 103 /* dataset follows */ 104 /* mountpoint follows */ 105 } zev_zfs_mount_t; 106 107 typedef struct zev_zfs_umount_t { 108 ZEV_COMMON_FIELDS; 109 } zev_zfs_umount_t; 110 111 typedef struct zev_zvol_truncate_t { 112 ZEV_COMMON_FIELDS; 113 uint64_t offset; 114 uint64_t length; 115 uint32_t dataset_len; 116 uint32_t padding; 117 /* dataset follows */ 118 } zev_zvol_truncate_t; 119 120 typedef struct zev_zvol_write_t { 121 ZEV_COMMON_FIELDS; 122 uint64_t offset; 123 uint64_t length; 124 uint32_t dataset_len; 125 uint32_t padding; 126 /* dataset follows */ 127 } zev_zvol_write_t; 128 129 typedef struct zev_znode_close_after_update_t { 130 ZEV_COMMON_FIELDS; 131 zev_inode_info_t file; 132 } zev_znode_close_after_update_t; 133 134 typedef struct zev_znode_create_t { 135 ZEV_COMMON_FIELDS; 136 zev_inode_info_t file; 137 zev_inode_info_t parent; 138 uint32_t name_len; 139 uint32_t padding; 140 /* name follows */ 141 } zev_znode_create_t; 142 143 typedef struct zev_znode_create_t zev_znode_mkdir_t; 144 typedef struct zev_znode_create_t zev_znode_make_xattr_dir_t; 145 146 typedef struct zev_znode_remove_t { 147 ZEV_COMMON_FIELDS; 148 zev_inode_info_t parent; 149 uint32_t name_len; 150 uint32_t padding; 151 /* name follows */ 152 } zev_znode_remove_t; 153 154 typedef struct zev_znode_remove_t zev_znode_rmdir_t; 155 156 typedef struct zev_znode_link_t { 157 ZEV_COMMON_FIELDS; 158 zev_inode_info_t parent; 159 zev_inode_info_t file; 160 uint32_t name_len; 161 uint32_t padding; 162 /* new_name follows */ 163 } zev_znode_link_t; 164 165 typedef struct zev_znode_symlink_t { 166 ZEV_COMMON_FIELDS; 167 zev_inode_info_t parent; 168 zev_inode_info_t file; 169 uint32_t name_len; 170 uint32_t link_len; 171 /* name follows */ 172 /* link follows */ 173 } zev_znode_symlink_t; 174 175 typedef struct zev_znode_rename_t { 176 ZEV_COMMON_FIELDS; 177 zev_inode_info_t srcdir; 178 zev_inode_info_t dstdir; 179 zev_inode_info_t file; 180 uint32_t srcname_len; 181 uint32_t dstname_len; 182 /* srcname follows */ 183 /* dstname follows */ 184 } zev_znode_rename_t; 185 186 typedef struct zev_znode_write_t { 187 ZEV_COMMON_FIELDS; 188 zev_inode_info_t file; 189 uint64_t offset; 190 uint64_t length; 191 } zev_znode_write_t; 192 193 typedef struct zev_znode_truncate_t { 194 ZEV_COMMON_FIELDS; 195 zev_inode_info_t file; 196 uint64_t offset; 197 uint64_t length; 198 } zev_znode_truncate_t; 199 200 typedef struct zev_znode_setattr_t { 201 ZEV_COMMON_FIELDS; 202 zev_inode_info_t file; 203 } zev_znode_setattr_t; 204 205 typedef struct zev_znode_acl_t { 206 ZEV_COMMON_FIELDS; 207 zev_inode_info_t file; 208 } zev_znode_acl_t; 209 210 /* convenience helper definition */ 211 typedef union { 212 zev_header_t header; 213 214 zev_error_t error; 215 zev_mark_t mark; 216 union { 217 zev_zfs_mount_t mount; 218 zev_zfs_umount_t umount; 219 } zfs; 220 union { 221 zev_zvol_truncate_t truncate; 222 zev_zvol_write_t write; 223 } zvol; 224 union { 225 zev_znode_close_after_update_t close; 226 zev_znode_create_t create; 227 zev_znode_mkdir_t mkdir; 228 zev_znode_make_xattr_dir_t mkxattrdir; 229 zev_znode_remove_t remove; 230 zev_znode_rmdir_t rmdir; 231 zev_znode_link_t link; 232 zev_znode_symlink_t symlink; 233 zev_znode_rename_t rename; 234 zev_znode_write_t write; 235 zev_znode_truncate_t truncate; 236 zev_znode_setattr_t setattr; 237 zev_znode_acl_t acl; 238 } znode; 239 } zev_event_t; 240 241 242 243 typedef struct zev_statistics_t { 244 uint64_t zev_queue_len; 245 uint64_t zev_bytes_read; 246 /* runtime settings */ 247 uint64_t zev_max_queue_len; 248 uint64_t zev_poll_wakeup_queue_len; 249 /* counters */ 250 uint64_t zev_cnt_total_events; 251 uint64_t zev_cnt_errors; 252 uint64_t zev_cnt_marks; 253 /* zfsvfs ops */ 254 uint64_t zev_cnt_zfs_mount; 255 uint64_t zev_cnt_zfs_umount; 256 /* zvol ops */ 257 uint64_t zev_cnt_zvol_write; 258 uint64_t zev_cnt_zvol_truncate; 259 /* znode ops */ 260 uint64_t zev_cnt_znode_close_after_update; 261 uint64_t zev_cnt_znode_create; 262 uint64_t zev_cnt_znode_remove; 263 uint64_t zev_cnt_znode_link; 264 uint64_t zev_cnt_znode_symlink; 265 uint64_t zev_cnt_znode_rename; 266 uint64_t zev_cnt_znode_write; 267 uint64_t zev_cnt_znode_truncate; 268 uint64_t zev_cnt_znode_setattr; 269 uint64_t zev_cnt_znode_acl; 270 } zev_statistics_t; 271 272 typedef struct zev_ioctl_poolarg { 273 uint64_t zev_poolname_len; 274 char zev_poolname[MAXPATHLEN]; 275 } zev_ioctl_poolarg_t; 276 277 typedef struct zev_ioctl_mark { 278 uint64_t zev_mark_id; 279 uint64_t zev_guid; 280 uint32_t zev_payload_len; 281 uint32_t padding; 282 /* payload follows */ 283 } zev_ioctl_mark_t; 284 285 typedef struct zev_ioctl_get_gen { 286 /* input */ 287 uint64_t inode; 288 uint32_t fd; /* open fd to any object on the same fs */ 289 /* noput */ 290 uint32_t padding; 291 /* output */ 292 uint64_t generation; 293 uint64_t crtime; 294 uint64_t guid; 295 char dataset[MAXPATHLEN]; 296 } zev_ioctl_get_gen_t; 297 #pragma pack() 298 299 #ifdef _KERNEL 300 typedef struct zev_msg_t { 301 struct zev_msg_t *next; 302 int size; 303 /* data follows */ 304 } zev_msg_t; 305 306 void zev_queue_error(int op, char *fmt, ...); 307 void zev_queue_message(int op, zev_msg_t *msg); 308 void zev_queue_message_nvlist(int op, nvlist_t *nvl); 309 int zev_skip_pool(objset_t *os); 310 311 #endif 312 313 #endif /* __ZEV_H__ */ 314 315