Commit Graph

69 Commits

Author SHA1 Message Date
Christian S.J. Peron
c313f09bfb When using files as backing stores for devices, and the user has requested the
device be created read+write, check to see if the backing store is read only
through the use of the access(2) system call. If this check fails returning
EACCES, EPERM or EROFS then gracefully downgrade the access to read only. Also
print a warning message to stderr, informing the user that the access mode
they requested is not available.

This behavior used to be handled by md(4) but was changed in revision 1.154

Discussed with:	pjd, phk, Dario Freni <saturnero at freesbie dot org>
Reviewed by:	phk
2005-08-30 16:45:32 +00:00
Pawel Jakub Dawidek
5d19b2f993 We can specify device size in bytes. Document this in usage. 2005-03-01 14:56:49 +00:00
Michael Reifenberger
d111a5c972 Document the terabyte "-s" parameter in the usage string.
Split the usage line to not exceed 80 chars.
2005-02-21 09:09:07 +00:00
Ruslan Ermilov
8d646af581 Sync program's usage() with manpage's SYNOPSIS. 2005-02-10 09:19:34 +00:00
Pawel Jakub Dawidek
0d79319a76 Allow to specify device size in bytes.
MFC after:	1 week
2005-01-22 20:02:01 +00:00
Pawel Jakub Dawidek
88b5b78d59 Rewrite piece of code which I committed some time ago that allows to
show file name for 'mdconfig -l -u <x>' command.
This allows to preserve API/ABI compatibility with version 0 (that's why
I changed version number back to 0) and will allow to merge this change
to RELENG_5.

MFC after:	5 days
2004-12-27 17:20:06 +00:00
Ruslan Ermilov
78bb116290 Sync usage() with manpage SYNOPSIS and code. 2004-11-13 17:08:52 +00:00
Dima Dorfman
df5f8fa751 Bump .Dd, replace missing letter, and prefer to use a verb that
matches the option letter.

Submitted by:	ru
Should know better by now:	dd
2004-11-06 14:03:37 +00:00
Pawel Jakub Dawidek
61a6eb62ec For file backed md(4) devices output their source file via
'mdconfig -l -u <unit>'.
Bump version number, as this change breaks ABI/API.
2004-11-06 13:07:02 +00:00
Dima Dorfman
e08f2053fc Update the description of -l to reflect reality. After mdconfig.c
1.25, -l without -u only lists the names, so specifying -u does more
than just limit the output to one device.
2004-11-06 10:21:12 +00:00
Dima Dorfman
9a777b93be If there aren't any devices to list, output nothing instead of an
empty line. This is consistent with other utilities.

While I'm here, remove artifacts of the previous list implementation.
2004-11-06 09:56:27 +00:00
Pawel Jakub Dawidek
b830359bc5 - Make md(4) 64-bit clean.
After this change it should be possible to use very big md(4) devices.
- Clean up and simplify the code a bit.
- Use humanize_number(3) to print size of md(4) devices.
- Add 't' suffix which stands for terabyte.
- Make '-S' to really work with all types of devices.
- Other minor changes.
2004-09-16 21:32:13 +00:00
John-Mark Gurney
d31ba6257b add support for documented readonly option...
also print out the option that is unknow so that the user knows what (s)he
did wrong..

MFC after:	3 days
2004-09-08 20:28:29 +00:00
John-Mark Gurney
a246f097d6 change the name of the md module, to g_md, introduce a define with the
name MD_MODNAME, and make mdconfig use this new define...
2004-08-09 06:45:20 +00:00
Poul-Henning Kamp
e869d3777e Give better diagnostic for problems with backing files. 2004-07-25 08:17:23 +00:00
Ruslan Ermilov
9806e23132 Mechanically kill hard sentence breaks. 2004-07-02 21:45:06 +00:00
Ruslan Ermilov
d04b5dfe6c Assorted markup, grammar, and spelling fixes. 2004-05-17 08:35:43 +00:00
Poul-Henning Kamp
7a6b2b6429 Fix a long-standing deadlock issue with vnode backed md(4) devices:
On vnode backed md(4) devices over a certain, currently undetermined
size relative to the buffer cache our "lemming-syncer" can provoke
a buffer starvation which puts the md thread to sleep on wdrain.

This generally tends to grind the entire system to a stop because the
event that is supposed to wake up the thread will not happen until a fair
bit of the piled up I/O requests in the system finish, and since a lot
of those are on a md(4) vnode backed device which is currently waiting
on wdrain until a fair amount of the piled up ... you get the picture.

The cure is to issue all VOP_WRITES on the vnode backing the device
with IO_SYNC.

In addition to more closely emulating a real disk device with a
non-lying write-cache, this makes the writes exempt from rate-limited
(there to avoid starving the buffer cache) and consequently prevents
the deadlock.

Unfortunately performance takes a hit.

Add "async" option to give people who know what they are doing the
old behaviour.
2004-03-10 20:41:09 +00:00
Poul-Henning Kamp
91f9647d49 s/bytes/byte/ 2004-02-19 19:53:07 +00:00
Poul-Henning Kamp
79ae25f61f Note that geometry can also be specified on vnode backed deviecs. 2004-01-12 10:54:09 +00:00
Poul-Henning Kamp
b4bca2d5ec Warn that big malloc disks are a panic(8) implementation.
Submitted by:	Colin Percival <cperciva@builder.daemonology.net>
(Who should really get his own bit one of these days!)

PR:	59988
2004-01-02 14:28:06 +00:00
Marc Fonvieille
84783ceaeb Add a full example of a file-backed disk creation, I used the Handbook's
example.

PR:		docs/51897
Submitted by:	Kevin Oberman <oberman@es.net>
2003-10-11 09:59:25 +00:00
Marc Fonvieille
8b23842d38 s/disklabel/bsdlabel where needed. 2003-10-11 08:24:07 +00:00
Poul-Henning Kamp
076cb6a8c9 Document the -x and -y options. 2003-09-21 19:05:35 +00:00
Alexander Kabaev
8a50130bbb Do not compare unsigned int values with ULONG_MAX. The comparison is
always false on 64bit platforms and GCC 3.3.1 issues warning there.
2003-07-11 05:47:05 +00:00
Robert Watson
f79c46d3f4 Add "-n" argument, which causes mdconfig to simply print the unit
number X, rather than mdX, making it easier to script tests that
use md devices but don't want to make assumptions about any existing
md use (such as in diskless environments).
2003-06-11 06:38:24 +00:00
Doug Barton
1b6c6f4aae Add .Xr's to mdmfs(8).
Submitted by:	Scot W. Hetzel <hetzels@westbend.net>
2003-04-27 01:46:56 +00:00
Poul-Henning Kamp
4e8bfe1482 Add a couple of undocumented test options to MD(4) to aid in regression
testting of GEOM.
2003-04-09 11:59:29 +00:00
Yaroslav Tykhiy
252bcf459d Give clearer diagnostics on some cases of invalid
combinations of mdconfig(8) command-line arguments.

Make mdconfig(8) accept "-a -f file -o options"
equally with "-a -f file" (assuming "-t vnode".)
2003-04-01 15:23:55 +00:00
Poul-Henning Kamp
ebe789d61c Add a "-S sectorsize" option to enable Kirk to find a bug :-) 2003-03-03 13:05:00 +00:00
Poul-Henning Kamp
e39eff98a0 Don't use the kern.disks sysctl to find a list of md devices, use the
MDIOCLIST ioctl instead.

Spotted by:	keramida
2003-01-27 08:01:08 +00:00
Giorgos Keramidas
f9e425b336 Make sure strsep() gets a nul-terminated string.
Reviewed by:	phk
2002-10-10 10:07:19 +00:00
Poul-Henning Kamp
ea396d5bfa Don't show disklabel in the examples, it is not necessary. 2002-09-26 21:29:10 +00:00
Tom Rhodes
ce66ddb763 s/filesystem/file system/g as discussed on -developers 2002-08-21 18:11:48 +00:00
Warner Losh
9d010543f4 Don't use NULL where you really mean 0 to sysctlbyname. 2002-08-21 15:15:15 +00:00
Ralf S. Engelschall
32f28b1541 Replace extra call to "tunefs" with the equivalent of "newfs -U".
Reviewed by:	phk
2002-07-15 11:30:21 +00:00
Philippe Charnier
e1205e80e5 The .Nm utility 2002-07-06 19:34:18 +00:00
Dag-Erling Smørgrav
d397408818 Usage style sweep: spell "usage" with a small 'u'.
Also change one case of blatant __progname abuse (several more remain)
This commit does not touch anything in src/{contrib,crypto,gnu}/.
2002-04-22 13:44:47 +00:00
Mike Barcroft
40dcc8608d Revert 1.20:
Memory disks may be used for other purposes besides newfs(8), so it
isn't helpful to require the minimum size meet newfs(8)'s criteria.
2002-03-21 12:03:09 +00:00
Mike Barcroft
6a1bd01754 Provide a proper error message in mdconfig(8) when a filesystem is too
small, instead of a less meaningful error in newfs(8).
2002-03-21 07:46:09 +00:00
Dima Dorfman
53d745bc7c Actually make use of the md_version field of 'struct mdio'. In order
not to needlessly break compatibility, decrement MDIOVERSION to 0.

Approved by:	phk
2001-12-20 06:38:21 +00:00
David E. O'Brien
2d68bf45bf Default to WARNS=2.
Binary builds that cannot handle this must explicitly set WARNS=0.

Reviewed by:	mike
2001-12-04 02:19:58 +00:00
Ruslan Ermilov
b87581119e mdoc(7) police: removed (now gratuitous) .Xo/.Xc brackets. 2001-08-10 10:41:30 +00:00
Dima Dorfman
3fa96e6678 Move all the prototypes to one place. 2001-08-07 19:27:46 +00:00
Dima Dorfman
26a0ee75c6 Introduce a force option, MD_FORCE, that instructs the driver to
bypass some extra anti-foot-shooting measures.  Currently, its only
effect is to allow detaching a device while it's still open (e.g.,
mounted).  This is useful for testing how the system reacts to a disk
suddenly going away, which can happen with some removeable media.

At this point, the force option is only checked on detach, so it
would've been possible to allow the option to be passed with the
MDIOCDETACH operation.  This was not done to allow the possibility of
having the force flag influence other tests in the future, which may
not necessarily deal with detaching the device.

Reviewed by:	sobomax
Approved by:	phk
2001-08-07 19:23:16 +00:00
Dima Dorfman
10b0e058bb Use MD_NAME and MDCTL_NAME constants where appropriate. 2001-07-18 13:32:38 +00:00
Dima Dorfman
7ebcc426ef Remove whitespace at EOL. 2001-07-15 07:53:42 +00:00
Ruslan Ermilov
9fe48c6e8d mdoc(7) police: removed HISTORY info from the .Os call. 2001-07-10 11:04:34 +00:00
Dima Dorfman
c894b25a2f Constify mdmaybeload(), add a prototype for usage(), and get rid of a
sizeof(int) == sizeof(long) assumption; clamp down with WARNS=2.
2001-06-21 02:10:26 +00:00
Dima Dorfman
78baea25b2 Don't assume the length of MD_NAME is 2. 2001-06-21 01:39:01 +00:00