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. new kernel call sysctl for generic unprivileged system operations;

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now used for printing diagnostic messages through the kernel message
   buffer. this lets processes print diagnostics without sending messages
   to tty and log directly, simplifying the message protocol a lot and
   reducing difficulties with deadlocks and other situations in which
   diagnostics are blackholed (e.g. grants don't work). this makes
   DIAGNOSTICS(_S), ASYN_DIAGNOSTICS and DIAG_REPL obsolete, although tty
   and log still accept the codes for 'old' binaries. This also simplifies
   diagnostics in several servers and drivers - only tty needs its own
   kputc() now.
 . simplifications in vfs, and some effort to get the vnode references
   right (consistent) even during shutdown. m_mounted_on is now NULL
   for root filesystems (!) (the original and new root), a less awkward
   special case than 'm_mounted_on == m_root_node'. root now has exactly
   one reference, to root, if no files are open, just like all other
   filesystems. m_driver_e is unused.
This commit is contained in:
Ben Gras
2009-01-26 17:43:59 +00:00
parent 4984a86f32
commit 3cc092ff06
38 changed files with 243 additions and 531 deletions
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4
drivers/tty/console.c
View File

@@ -1150,8 +1150,8 @@ int safe;
}
cons_putk(0); /* always terminate, even with EFAULT */
if(m_ptr->m_type != ASYN_DIAGNOSTICS) {
m_ptr->m_type = DIAG_REPL;
if(m_ptr->m_type != ASYN_DIAGNOSTICS_OLD) {
m_ptr->m_type = DIAG_REPL_OLD;
m_ptr->REP_STATUS = result;
send(m_ptr->m_source, m_ptr);
}

6
drivers/tty/tty.c
View File

@@ -216,7 +216,7 @@ PUBLIC int main(void)
if (sigismember(&sigset, SIGKMESS)) do_new_kmess(&tty_mess);
continue;
}
case DIAGNOSTICS: /* a server wants to print some */
case DIAGNOSTICS_OLD: /* a server wants to print some */
#if 0
if (tty_mess.m_source != LOG_PROC_NR)
{
@@ -225,8 +225,8 @@ PUBLIC int main(void)
#endif
do_diagnostics(&tty_mess, 0);
continue;
case DIAGNOSTICS_S:
case ASYN_DIAGNOSTICS:
case DIAGNOSTICS_S_OLD:
case ASYN_DIAGNOSTICS_OLD:
do_diagnostics(&tty_mess, 1);
continue;
case GET_KMESS: