fs/ufs/ufs_panic.c

4  * The contents of this file are subject to the terms of the
23  * Use is subject to license terms.
117 /* all probably ought to be different, but these are convenient for debugging */
192 	UFA_SET			/* change uf to state */
215 /* thread to watch for failures */
280  * if flagged to be locked but not unmounted:	(UFSMNT_ONERROR_LOCK)
286  * if flagged to be unmounted:			(UFSMNT_ONERROR_UMOUNT)
289  * if flagged to panic:				(UFSMNT_ONERROR_PANIC)
312 	{ UF_TRYLCK,	"trying to be locked",	sf_nonterm_cmn,
405  *  when a failure is detected to put the file system into an
406  *  error state (if possible) or to devolve to a panic otherwise
408  * vnode is some vnode in this file system, used to find the way
409  * to ufsvfs, vfsp etc.  Since a panic can be called from many
410  * levels, the vnode is the most convenient hook to pass through.
455 		 * In order for the bad thing to be recorded in the superblock
456 		 * we need to write to the superblock directly.
458 		 * would normally intercept our write as a delta to the log,
515 				 * threadp so we have to release the lock.
522 			 * No need to log another failure as one is already
556  *  Attempt to fix iff:
558  *    - this file system isn't explicitly marked not to be fixed
559  *    - we can connect to the user-level daemon
644 	 * enough information to make a fix attempt possible?
778 	delay(hz >> 1);			/* allow previous warnings to get out */
1062  * triggers differently in order to use uq_ne as meaningful data.
1077 		/* sleep until there is work to do */
1106  * returns # of seconds to sleep before trying again
1129 	 *  is appropriate to move it to the next state
1134 	 *   retry == 0; nothing more to do (terminal state)
1193 	 * XXX to run fsck manually (and change retry time?)
1195 	cmn_err(seriousness, "Waiting for repair of %s to %s",
1438 		 * UF_TRYLCK to set fx_current
1471 	 * don't need to check for null ufsvfsp because
1473 	 * to mark it null and we own that lock since
1491 	 * copy general flags to this ufs_failure so we don't
1492 	 * need to refer back to the ufsvfs, or, more importantly,
1493 	 * don't need to keep acquiring (trying to acquire) vfs_lockp
1513 			TRIVIA((": set to replica failed] "));
1684 	 * just reset to current state
1753 	 * get on disk superblock; force it to really
1791 	/* fsck started but doesn't seem to be proceeding? */
1962 		 * XXX or move to an historical list?
1967 		 * to occur (to the point of memory shortages),
2058 state_trans_valid(ufs_failure_states_t from, ufs_failure_states_t to)
2065 	if (from & to)
2068 	s = get_state_desc(to);
2072 	 * (to detect freshly allocated memory)
2075 	valid = (to & UF_INIT)? from == s->ud_prev: from & s->ud_prev;
2205 		 * if can't get lock, then fallback to panic, unless
2364 			HIDEOUS((": vfs_bufp mutated from 0x%p to 0x%p\n",
2369 			HIDEOUS((": vfs_bufp mutated from 0x%p to 0x%p\n",
2546  * used to coordinate with hlock thread (see ufs_thread.c)
2547  * and to determine when the error lock thread may exit
2594  *  called to shutdown fix failure thread and server daemon