Commit graph

32 commits

Author SHA1 Message Date
Philip Homburg
7ce17fe655 Support for SI_CALL_STATS (counting systemcalls). 2006-07-10 12:44:43 +00:00
Ben Gras
bd535a120b . satisfy some gcc warnings (uninitialized/unused variables)
. change cloexec mask from long to fd_set to remove 32 fd's per
   process restriction (from cloexec at least)
2006-06-27 16:47:35 +00:00
Ben Gras
2384a85296 FS support for grant-based i/o.
For character device i/o, FS does a so-called 'magic' grant to let the
driver copy from or to user space. As this is done in FS address space,
the driver is told to do this in FS address space. The redirection to
the right user process then happens at copy-time in the kernel, using the
FS grant table. This also happens for DEV_READ and DEV_WRITE on block
devices.

For other block device i/o, which happens from/to FS buffers, FS does
a 'direct' grant to its own address space for the driver.

After the i/o returns, this access has to be K-I-L-L-E-D, revoked.
Sometimes this is after a SUSPEND and DEV_REVIVE, in which case the
revoking happens in pipe.c.

This conversion happens in safe_io_conversion() in device.c, called
by dev_io and dev_bio.

FS has to pre-allocate its own space for these grant tables. This happens
in main.c.
2006-06-20 10:12:09 +00:00
Philip Homburg
e9aabcf2f8 Disabled building rescue driver (no longer needed). Moved allocmem from
library to the memory driver. Always put output from within TTY directly on
the console. Removed second include of driver.h from tty.c. Made tty_inrepcode
bigger. First step to move PM and FS calls that are not regular (API)
system calls out of callnr.h (renumbered them, and removed them from the
table.c files). Imported the Minix-vmd uname implementation. This provides
a more stable ABI than the current implementation. Added a bit of security
checking. Unfortunately not nearly enough to get a secure system. Fixed a
bug related to the sizes of the programs in the image (in PM patch_mem_chunks).
2006-05-19 12:19:37 +00:00
Philip Homburg
f0186f4179 Do not unmap a driver when the driver dies (it interferes with restarting
disk drivers). Fixed accounting for REVIVING/reviving.
2006-05-15 11:43:06 +00:00
Philip Homburg
773844a816 New interface between PM and FS. 2006-05-11 14:57:23 +00:00
Ben Gras
ff67776995 FS:
. loops checked for PID_FREE
  . exit broken down in exit and cleanup functions; when reboot happens,
    cleanup is done but not exit (as processes have not actually exited),
    this keeps drivers working
  . fixed a few uninitialized and unused variables

scripts:
  . new packaging system
2006-03-15 15:34:12 +00:00
Philip Homburg
50d805144c dmap_io now returns a status. map_driver no longer calls dev_up. 2006-03-15 13:37:20 +00:00
Ben Gras
def8c13ba8 Do a sync() before reboot()ing in FS. 2006-03-14 13:54:20 +00:00
Jorrit Herder
021e3234d8 Jorrit's ... "progress?" 2006-03-10 16:10:05 +00:00
Ben Gras
6746ee10f5 If re-open fails, mark fd as unusable but not-reusable either (until
close()d).
2006-03-09 16:00:33 +00:00
Ben Gras
7967177710 endpoint-aware conversion of servers.
'who', indicating caller number in pm and fs and some other servers, has
been removed in favour of 'who_e' (endpoint) and 'who_p' (proc nr.).

In both PM and FS, isokendpt() convert endpoints to process slot
numbers, returning OK if it was a valid and consistent endpoint number.
okendpt() does the same but panic()s if it doesn't succeed. (In PM,
this is pm_isok..)

pm and fs keep their own records of process endpoints in their proc tables,
which are needed to make kernel calls about those processes.

message field names have changed.

fs drivers are endpoints.

fs now doesn't try to get out of driver deadlock, as the protocol isn't
supposed to let that happen any more. (A warning is printed if ELOCKED
is detected though.)

fproc[].fp_task (indicating which driver the process is suspended on)
became an int.

PM and FS now get endpoint numbers of initial boot processes from the
kernel. These happen to be the same as the old proc numbers, to let
user processes reach them with the old numbers, but FS and PM don't know
that. All new processes after INIT, even after the generation number
wraps around, get endpoint numbers with generation 1 and higher, so
the first instances of the boot processes are the only processes ever
to have endpoint numbers in the old proc number range.

More return code checks of sys_* functions have been added.

IS has become endpoint-aware. Ditched the 'text' and 'data' fields
in the kernel dump (which show locations, not sizes, so aren't terribly
useful) in favour of the endpoint number. Proc number is still visible.

Some other dumps (e.g. dmap, rs) show endpoint numbers now too which got
the formatting changed.

PM reading segments using rw_seg() has changed - it uses other fields
in the message now instead of encoding the segment and process number and
fd in the fd field. For that it uses _read_pm() and _write_pm() which to
_taskcall()s directly in pm/misc.c.

PM now sys_exit()s itself on panic(), instead of sys_abort().

RS also talks in endpoints instead of process numbers.
2006-03-03 10:20:58 +00:00
Ben Gras
b9bdbcba1b Don't sync before exiting drivers.
Wipe inodes of pipes in truncate_inode(), to avoid the size remaining
at PIPE_SIZE causing pipes to break.
2006-02-13 10:28:42 +00:00
Ben Gras
040cebcefe Don't kill processes by signals in process group 0, and do a sync before
killing all processes in FS reboot.
2006-02-03 15:21:00 +00:00
Ben Gras
3bddaaf580 Let other uids (temporarily) set their mapping. 2006-01-20 12:43:19 +00:00
Ben Gras
50b06261b6 Implementation of truncate(), ftruncate() and the F_FREESP fcntl().
Implemented by changing write_map to accept a WMAP_FREE flag. In that
case, it doesn't update the datablock (creating indirect zones as
necessary) pointer, but it frees the datablock if present. Also it
frees the single and double indirect blocks if unused.

This makes the implementation of truncate_inode() simpler.
truncate_inode() now accepts a truncation length which makes
implementing truncate() and ftruncate() simple.

This also allowed implementing the F_FREESP fcntl().
2006-01-11 17:14:51 +00:00
Ben Gras
b5e3e6d18c Two 'dynamic driver' features in FS:
.  When drivers disappear that have pending select()s, wake up
   those user processes with EAGAIN so that they can retry their
   select() and won't hang forever on it.
.  When drivers re-appear and are mapped into the dmap, run through
   the list of mounted filesystems and re-dev_open() every one (for
   partition tables and such). This can't happen before the driver
   has exec()ced itself, so processes that have fork()ed but not
   exec()ced yet are marked as DMAP_BABY in the dmap table if they
   are dmapped before they are execced. If that happens, the above
   procedure happens after the exec(). If the exec() happens before
   the dmapping, it (the dev_open()ing) happens right away.
2005-10-20 19:39:32 +00:00
Ben Gras
2eca6f9374 If processes are blocked on device drivers (returning SUSPEND),
unblock the processes when the device drivers die.
2005-10-12 15:01:23 +00:00
Ben Gras
86ed54ee94 FS:
. unmap device drivers from dmap when PM signals they are dead
	. new null-io function (no_dev_io) to fill in for io functions
	  of unmapped drivers
	. driver (process number) of unmapped drivers is NONE instead of
	  0 (a valid process number)

IS:
	. print mutable flag of dmap table too

FS changes require sync() to be done 'manually' (currently by
reboot/shutdown) at shutdown time; could be caught by SIGTERM in
the future.
2005-10-05 15:38:15 +00:00
Ben Gras
2986c11811 DEV_UNMAP devctl()
FSDEVUNMAP svrctl()
2005-10-03 14:17:33 +00:00
Ben Gras
42fbd9aced Andy's formatting changes. 2005-09-11 16:45:46 +00:00
Jorrit Herder
207f4731dc FS cleanup with gcc. 2005-08-25 12:30:43 +00:00
Ben Gras
d11b2e4b8c Al's double-blank-line removal request 2005-08-22 15:23:47 +00:00
Jorrit Herder
f44725b777 Created new devctl system call to FS. Moved dmap.h header to include/minix/.
Various updates to support dynamically starting servers and suppress output.
2005-08-02 15:29:17 +00:00
Philip Homburg
aa994b48ee Do not accept requests from dead processes. 2005-07-27 12:01:11 +00:00
Jorrit Herder
3d0b9140f2 Updated F4 dump at IS to include send masks.
Removed unused constant from fproc.h
Changed signal behaviour at PM (work in progress)
2005-07-26 12:49:35 +00:00
Ben Gras
9cf24c3233 Calls and functionality for get/setpriority() and fsync(). 2005-07-01 17:58:29 +00:00
Jorrit Herder
c2cd510adf Removed debug dumps from the PM and FS servers. The dumps are now done by the
IS servers, which obtains a copy of the data through the getsysinfo() system
call. CTRL-F1 now is a special TTY key to shows function key mappings.
2005-06-07 14:43:35 +00:00
Jorrit Herder
2f74381dcc Fixed 'ps' utility: now get process table addresses with getsysinfo() calls.
To be done: get copies of process tables instead of using /dev/(k)mem.
2005-06-06 13:51:50 +00:00
Jorrit Herder
1ecc6bf3b3 Removed 'system process' magic from PM and FS. 2005-05-13 08:57:08 +00:00
Jorrit Herder
89ac678b9b *** empty log message *** 2005-04-29 15:36:43 +00:00
Ben Gras
9865aeaa79 Initial revision 2005-04-21 14:53:53 +00:00