diff options
| -rw-r--r-- | libdiskfs/diskfs.h | 52 |
1 files changed, 42 insertions, 10 deletions
diff --git a/libdiskfs/diskfs.h b/libdiskfs/diskfs.h index 8049cfbe..a8a8b9ce 100644 --- a/libdiskfs/diskfs.h +++ b/libdiskfs/diskfs.h @@ -49,6 +49,7 @@ struct peropen int lock_status; int refcnt; int openstat; + mach_port_t dotdotport; struct node *np; }; @@ -122,8 +123,6 @@ extern mach_port_t diskfs_exec; /* send right */ extern auth_t diskfs_auth_server_port; /* send right */ -extern struct port_info *diskfs_control_port; - extern volatile struct mapped_time_value *diskfs_mtime; extern int diskfs_bootflags; @@ -137,6 +136,36 @@ extern int pager_port_type; struct pager; +/* The user must observe the following discipline in port creation + with the ports library. Any port for which a send right is + given to any entity outside the filesystem itself must be + a hard port. Other ports used only internally should be + soft ports. + + When there are neither hard ports nor soft ports, the diskfs + library will call diskfs_sync_everything with WAIT set. This + should sync everything; upon return diskfs will exit. (There + should be no active pagers at all in this state, because such + would be either hard or soft ports.) + + When there are only soft ports, diskfs will call + diskfs_shutdown_soft_ports. This function should initiate (but + need not complete) the destruction of any outstanding soft ports. + When they are actually destroyed, diskfs_sync_everything will be + called as described above. + + When the only outstanding hard port is the control port for + the filesystem and the filesystem has been idle for a considerable + time (as defined by the ports library), diskfs will detach from the + parent filesystem and call diskfs_shutdown_soft_ports. + + When the filesystem is asked to exit with FSYS_GOAWAY_NOSYNC, + it will not bother calling diskfs_sync_everything. When the + filesystem is asked to exit with FSYS_GOAWAY_FORCE, all existing + send rights for files are immediately destroyed. Then + diskfs_sync_everything is called and the filesystem will exit. +*/ + /* Declarations of things the user must or may define. */ @@ -164,11 +193,6 @@ extern int diskfs_maxsymlinks; should be readonly. */ extern int diskfs_readonly; -/* The user must define this variable. Set this to be an unauthenticated - port to the directory which should be `..' from root. If this is - *the* root, then set this to MACH_PORT_NULL. */ -extern file_t diskfs_dotdot_file; - /* The user must define this variable. Set this to be the node of root of the filesystem. */ extern struct node *diskfs_root_node; @@ -362,6 +386,11 @@ void diskfs_lost_hardrefs (struct node *np); might not be locked; this routine should not attempt to gain the lock. */ void diskfs_new_hardrefs (struct node *np); +/* The user must define this function. There are no hard ports outstanding; + the user should take steps so that any soft ports outstanding get + shut down. */ +void diskfs_shutdown_soft_ports (); + /* The user must define this function. Return non-zero if locked directory DP is empty. If the user does not redefine diskfs_clear_directory and diskfs_init_directory, then `empty' @@ -420,8 +449,10 @@ void diskfs_init_completed (); char *diskfs_parse_bootargs (int argc, char **argv); /* Call this after arguments have been parsed to initialize the - library. */ -void diskfs_init_diskfs (void); + library. If BOOTSTRAP is set, the diskfs will call fsys_startup + on that port as appropriate and return the REALNODE returned + in that call; otherwise we return MACH_PORT_NULL. */ +mach_port_t diskfs_init_diskfs (mach_port_t bootstrap); /* Call this after all format-specific initialization is done (except for setting diskfs_root_node); at this point the pagers should be @@ -730,7 +761,8 @@ void diskfs_finish_protid (struct protid *cred, uid_t *uids, int nuids, /* Create and return a new peropen structure on node NP with open flags FLAGS. */ -struct peropen *diskfs_make_peropen (struct node *np, int flags); +struct peropen *diskfs_make_peropen (struct node *np, int flags, + mach_port_t dotdotnode); /* Called when a protid CRED has no more references. (Because references\ to protids are maintained by the port management library, this is |