Change VINUM_SAVECONFIG: it now requires a parameter. 0 means
"configuration updates are finished, please save", and 1 means "please
just save the config". This second meaning is invoked by the new
"saveconfig" command to vinum(8).
Recognize "referenced" drives by the lack of a slash in the device
name, not by a NUL character.
vinum_scandisk: return error indication (ENOENT if we can't find any
vinum drive, otherwise 0).
VINUM_SAVECONFIG: change parameters.
Don't save config while we're reading it from disk.
Change the way we handle the daemon: if we can't communicate with it
for 1 second (which is possible), start a new one. The daemon saves
its pid in daemonpid; on each iteration of the main loop the daemon
checks whether it's still in favour. If not, it silently exits.
Also, when trying to communicate with the daemon, check daemonpid
first. If it's set to 0, don't even try.
Rename the VF_KERNELOP to VF_DISKCONFIG and checkkernel () to
checkdiskconfig (), which better describes their function.
Disable configuration updates if we have an error reading in the
configuration. This stops a "shoot-in-foot" problem where a mistake
can cause the configuration to be obliterated.
Tidy up some messages, which included superfluous \ns.
Recognize RAID-5 configuration information even in the non-RAID-5
version. This fixes shoot-in-foot problems where starting the wrong
version of vinum would kill RAID-5 plexes.
Recognize drives that have been referenced, but for which no physical
location is known. This is part of a modification which will
ultimately allow incrementally reading configurations. Such drives
will have a device name "unknown".
New function return_drive_space () returns space to a drive.
Previously this was part of free_sd ().
give_sd_to_drive: don't do it if the subdisk needs more space than the
drive has available.
config_sd: if reading config from disk, accept plex offset, drive
offset and length specs of -1 to indicate error conditions.
parse_config: return ENOENT if the "read" command doesn't find any
drives.
remove_sd_entry: don't do it, even by force, if it's open.
If the size of a striped or RAID-5 plex is not an integral multiple of
the stripe size, trim the size until it is.
reinstate update_volume_config, which had atrophied, to recalculate
the size of a volume if a plex has shrunk due to stripe size
considerations.
vinumattach: Zero out tables after allocating them
Modify procedure at unload: if a vinum(8) has the superdev open, don't
close down. If only the daemon has it open, send the daemon a stop
request and wait for it to close the superdev, then unload.
In order to do this, create a second superdev which is opened by the
daemon. The open and close routines set a different bit in
vinum_conf.flags; otherwise the treatment is identical.
Remove opencount field in vol structure; replace by a flag bit, since
we can't count the number of opens.
Remove dead LKM grunge.
the same name. Silently return EEXIST if this happens.
vinum_scandisk: Collect drive numbers, not pointers, to avoid problems
of relocated drives.
Tripped-over-by: Bernd Walter <ticso@cicely.de>
time out on an operation. Under these circumstances, vinum(8) will
automatically start another daemon. Add a pid for the daemon, so that
an overtaken daemon will discover that it's no longer in favour, and
will crawl into a corner and die.
apparently in accordance with style(9).
Complained-about-by: bde
vinumopen: Change check for root user to a call to suser(9)
vinumclose: Remove check for root user.
Nitpicked-by: phk
vinum_scandisk: check not only drive error, but also drive state,
before accessing the drive.
drivecmp: Remove warning messages by Backing out overly constant
declarations in revision 1.9.
Change from lkm to kld
Add field plexsdno to sd struct
Add flag VF_NEWBORN to drive, sd, plex and volume structs, indicating
that the object has just been created.
Add object types for raw (unattached) plexes and subdisks
Remove definitions of VOLNO, PLEXNO and SDNO (now functions Volno,
Plexno and Sdno)
Move revive parameters from struct plex to struct sd.
struct plex:
maintain a count of the number of inaccessible subdisks.
remove defective and unmapped regions.
Debug flags: make an enum (previously #define)
Set default revive block size to 64kB (was 32 kB)
Previously, accidentally starting the wrong version could corrupt
the RAID5 configuration.
Add functions Volno, Plexno and Sdno to replace the old defines
VOLNO, PLEXNO and SDNO.
Change from lkm to kld
Serious rewrite. No longer call set_<foo>_state to set the state
based only on other objects; instead, add functions
update_<foo>_state, which determine what the state should be by
themselves. This allows the set_<foo>_state functions to shrink
enough to be almost intelligible.
Remove flags setstate_recurse and setstate_recursing.
Remove plex defective regions and unmapped regions, which were
maintained but not used.
Change code to allow daemon to perform operations formerly kludged
into an interrupt context. Remove the DIRTYCONFIG kludge.
Change from lkm to kld
Remove #ifdefs for FreeBSD 2.c
vinumstrategy:
Support anonymous (`raw') subdisks and plexes.
Change code to allow daemon to perform operations formerly kludged
into an interrupt context. Remove the DIRTYCONFIG kludge.
No longer set B_ORDERED for reviving subdisks. I suspect this
wouldn't work correctly, and it should be done in a different manner
in vinumrevive.c
sdio: set subdisk state correctly on error
start to remove code that doesn't make any sense any more.
Remove #ifdefs for FreeBSD 2.c
Change from lkm to kld
correct type of `flags' in calls to set_drive_state.
set_drive_parms: handle anonymous drives correctly (remove them)
drive VOP functions: use the PID of the original opener to fool the
lock manager.
open_drive: be quiet about failures (they're normal when scanning the
partitions).
close_drive: lock drive before closing.
remove_drive: lock drive before deallocating.
read_drive_label: set drive up when all is OK
check_drive:
Complete rewrite. Offload most of the code to the new
vinum_scandisk
format_config:
use snprintf and %qd options to make much less emetic.
Remove old supporting functions.
vinum_scandisk:
Moved here from vinum.c
Almost complete rewrite, incorporating much of what was check_drive.
We still don't have a general way to find the drives on a system, so
get the user to supply the names via the `read' command. For each
device, try each possible compatibility slice name (there's a danger
of finding both /dev/da1h and /dev/da0s1h otherwise). Sort the
partitions found in reverse order of last update time and read them
in, setting the `update' parameter to parse_config and descendents.
save_config: rename to daemon_save_config, since the function is now
called by the daemon. Create a new function save_config which queues
the request with the daemon.
daemon_save_config: some mods to allow for the unfamiliar
environment.
Change from lkm to kld
Remove BROKEN_GDB kludge (it's not needed with klds)
Add code for interfacing with daemon
Modify device minor number encoding, use selector functions which also
permit anonymous plexes and subdisks.
Remove code for 2.x support.
Change messages to omit obvious words like 'plex' and 'subdisk.
give_plex_to_volume: invalidate subdisks being given to a plex which
is part of a volume with other plexes.
give_sd_to_plex: keep track of plex size in all cases
lock drives before closing them, to keep the daemon from getting
confused.
config_drive: handle partition type errors more gracefully
config_subdisk: set subdisk state correctly
find_drive, find_drive_by_dev, find_subdisk, find_plex, find_volume:
set VF_NEWBORN flag when a new object is created
config_drive:
Handle partition_status returns more cleverly.
Replace the device name in some cases where it got overwritten.
config_subdisk:
add parameter `update'. If the object already exists, exit without
any changes.
Set state correctly.
config_plex, config_volume:
add parameter `update'. If the object already exists, exit without
any changes.
parse_config:
move read function to vinum_scandisk.
add parameter `update' to pass to config_<object>.
remove_<object>_entry:
print a message when the object is removed.
update_plex_config:
Start defusing this function, which will go away some time.
Remove calls to update_volume_config.
Make size 64 bits
Change from lkm to kld
Remove BROKEN_GDB kludge (it's not needed with klds)
Add code for interfacing with daemon
Modify manner of determining when module is idle
Modify device minor number encoding, use selector functions which also
permit anonymous plexes and subdisks.
Remove code for 2.x support.
Move vinum_scandisk to vinumio.c
Remove myproc kludge
Keep track of open volumes by flag, not by pid (the pids caused some
problems with the lock manager).
free_vinum:
Remove unmapped and defective regions from plexes.
Wait for daemon to stop before returning
vinumopen:
Don't refuse an open if the volume is already open.
kernel as a pseudo-device. The changes were:
- #ifdef DEBUG -> #ifdef VINUMDEBUG
- opt_vinum.h for holding above config variable
- Fixing up a few stray problems where DEBUG wasn't optional.
- config.c -> vinumconfig.c (there's already a config.o)
- Other *.c -> vinum*.c (wasn't strictly necessary, but done in case we end
up with something else conflicting later on and we might have to have yet
more repository copies of files).
- include file paths fixups.. (ie: get them all from the kernel tree
instead of partly from the kernel and partly from /usr/include/machine)
I've spoken with Greg about this.. I hope this doesn't mess him around
too much..
