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3749 zfs event processing should work on R/O root filesystems
Submitted by:   Justin Gibbs <justing@spectralogic.com>


 221         uint64_t        spa_dspace;             /* dspace in normal class */
 222         kmutex_t        spa_vdev_top_lock;      /* dueling offline/remove */
 223         kmutex_t        spa_proc_lock;          /* protects spa_proc* */
 224         kcondvar_t      spa_proc_cv;            /* spa_proc_state transitions */
 225         spa_proc_state_t spa_proc_state;        /* see definition */
 226         struct proc     *spa_proc;              /* "zpool-poolname" process */
 227         uint64_t        spa_did;                /* if procp != p0, did of t1 */
 228         boolean_t       spa_autoreplace;        /* autoreplace set in open */
 229         int             spa_vdev_locks;         /* locks grabbed */
 230         uint64_t        spa_creation_version;   /* version at pool creation */
 231         uint64_t        spa_prev_software_version; /* See ub_software_version */
 232         uint64_t        spa_feat_for_write_obj; /* required to write to pool */
 233         uint64_t        spa_feat_for_read_obj;  /* required to read from pool */
 234         uint64_t        spa_feat_desc_obj;      /* Feature descriptions */
 235         cyclic_id_t     spa_deadman_cycid;      /* cyclic id */
 236         uint64_t        spa_deadman_calls;      /* number of deadman calls */
 237         uint64_t        spa_sync_starttime;     /* starting time fo spa_sync */
 238         uint64_t        spa_deadman_synctime;   /* deadman expiration timer */
 239         kmutex_t        spa_iokstat_lock;       /* protects spa_iokstat_* */
 240         struct kstat    *spa_iokstat;           /* kstat of io to this pool */

 241         /*
 242          * spa_refcnt & spa_config_lock must be the last elements
 243          * because refcount_t changes size based on compilation options.
 244          * In order for the MDB module to function correctly, the other
 245          * fields must remain in the same location.
 246          */
 247         spa_config_lock_t spa_config_lock[SCL_LOCKS]; /* config changes */
 248         refcount_t      spa_refcount;           /* number of opens */
 249 };
 250 
 251 extern const char *spa_config_path;
 252 
 253 extern void spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q,
 254     task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent);
 255 
 256 #ifdef  __cplusplus
 257 }
 258 #endif
 259 
 260 #endif  /* _SYS_SPA_IMPL_H */


 221         uint64_t        spa_dspace;             /* dspace in normal class */
 222         kmutex_t        spa_vdev_top_lock;      /* dueling offline/remove */
 223         kmutex_t        spa_proc_lock;          /* protects spa_proc* */
 224         kcondvar_t      spa_proc_cv;            /* spa_proc_state transitions */
 225         spa_proc_state_t spa_proc_state;        /* see definition */
 226         struct proc     *spa_proc;              /* "zpool-poolname" process */
 227         uint64_t        spa_did;                /* if procp != p0, did of t1 */
 228         boolean_t       spa_autoreplace;        /* autoreplace set in open */
 229         int             spa_vdev_locks;         /* locks grabbed */
 230         uint64_t        spa_creation_version;   /* version at pool creation */
 231         uint64_t        spa_prev_software_version; /* See ub_software_version */
 232         uint64_t        spa_feat_for_write_obj; /* required to write to pool */
 233         uint64_t        spa_feat_for_read_obj;  /* required to read from pool */
 234         uint64_t        spa_feat_desc_obj;      /* Feature descriptions */
 235         cyclic_id_t     spa_deadman_cycid;      /* cyclic id */
 236         uint64_t        spa_deadman_calls;      /* number of deadman calls */
 237         uint64_t        spa_sync_starttime;     /* starting time fo spa_sync */
 238         uint64_t        spa_deadman_synctime;   /* deadman expiration timer */
 239         kmutex_t        spa_iokstat_lock;       /* protects spa_iokstat_* */
 240         struct kstat    *spa_iokstat;           /* kstat of io to this pool */
 241         int64_t         spa_ccw_fail_time;      /* Conf cache write fail time */
 242         /*
 243          * spa_refcnt & spa_config_lock must be the last elements
 244          * because refcount_t changes size based on compilation options.
 245          * In order for the MDB module to function correctly, the other
 246          * fields must remain in the same location.
 247          */
 248         spa_config_lock_t spa_config_lock[SCL_LOCKS]; /* config changes */
 249         refcount_t      spa_refcount;           /* number of opens */
 250 };
 251 
 252 extern const char *spa_config_path;
 253 
 254 extern void spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q,
 255     task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent);
 256 
 257 #ifdef  __cplusplus
 258 }
 259 #endif
 260 
 261 #endif  /* _SYS_SPA_IMPL_H */