Commit graph

120 commits

Author SHA1 Message Date
David van Moolenbroek
db087efac4 VFS/FS: REQ_NEW_DRIVER now provides a label 2011-11-30 19:05:26 +01:00
David van Moolenbroek
b4d9ac91ba FS servers: fix dependencies broken in git-af01bda 2011-11-23 17:03:16 +01:00
David van Moolenbroek
b4d909d415 Split block/character protocols and libdriver
This patch separates the character and block driver communication
protocols. The old character protocol remains the same, but a new
block protocol is introduced. The libdriver library is replaced by
two new libraries: libchardriver and libblockdriver. Their exposed
API, and drivers that use them, have been updated accordingly.
Together, libbdev and libblockdriver now completely abstract away
the message format used by the block protocol. As the memory driver
is both a character and a block device driver, it now implements its
own message loop.

The most important semantic change made to the block protocol is that
it is no longer possible to return both partial results and an error
for a single transfer. This simplifies the interaction between the
caller and the driver, as the I/O vector no longer needs to be copied
back. Also, drivers are now no longer supposed to decide based on the
layout of the I/O vector when a transfer should be cut short. Put
simply, transfers are now supposed to either succeed completely, or
result in an error.

After this patch, the state of the various pieces is as follows:
- block protocol: stable
- libbdev API: stable for synchronous communication
- libblockdriver API: needs slight revision (the drvlib/partition API
  in particular; the threading API will also change shortly)
- character protocol: needs cleanup
- libchardriver API: needs cleanup accordingly
- driver restarts: largely unsupported until endpoint changes are
  reintroduced

As a side effect, this patch eliminates several bugs, hacks, and gcc
-Wall and -W warnings all over the place. It probably introduces a
few new ones, too.

Update warning: this patch changes the protocol between MFS and disk
drivers, so in order to use old/new images, the MFS from the ramdisk
must be used to mount all file systems.
2011-11-23 14:06:37 +01:00
David van Moolenbroek
af01bda509 libbdev: initial version
The "bdev" library provides basic primitives for file systems to talk
to block device drivers, hiding the details of the underlying protocol
and interaction model.

This version of libbdev is rather basic. It is planned to support the
following features in the long run:

 - asynchronous requests and replies;
 - recovery support for underlying block drivers;
 - retrying of failed I/O requests.

The commit also changes our block-based file systems (mfs, ext2, isofs)
to make use of libbdev.
2011-11-09 14:43:25 +01:00
Ben Gras
c83a90e2f1 mfs: ditch global readahead 2011-11-06 19:15:12 +01:00
Ben Gras
49532259e5 mfs: improve & simplify secondary cache logic
. fixes "!" errors when booting from cd
2011-09-23 15:02:20 +00:00
Thomas Veerman
203937456e Fix off-by-one errors and increase PATH_MAX to 1024
In some places it was assumed that PATH_MAX does not include a
terminating null character.

Increases PATH_MAX to 1024 to get in sync with NetBSD. Required some
rewriting in AVFS to keep memory usage low (the stack in use by a thread
is very small).
2011-09-12 09:00:24 +00:00
Ben Gras
4857d5d554 add -lminixfs with fs support routines
. move cache size heuristic from mfs there
	  so mfs and ext2 can share it
	. add vfs credentials retrieving function, with
	  backwards compatability from previous struct
	  format, to be used by both ext2 and mfs
	. fix for ext2 - STATICINIT was fed no.
	  of bytes instead of no. of elements, overallocating
	  memory by a megabyte or two for the superblock
2011-09-08 16:52:13 +00:00
Thomas Veerman
ce1a2793f9 Fix off-by-one error 2011-09-08 15:10:57 +00:00
Thomas Veerman
f78fb05676 Check group range for sanity 2011-09-08 12:23:03 +00:00
Thomas Veerman
8a266a478e Increase gid_t and uid_t to 32 bits
Increase gid_t and uid_t to 32 bits and provide backwards compatibility
where needed.
2011-09-05 13:56:14 +00:00
Thomas Veerman
8a73de51f1 Tell VFS how many requests an FS can handle concurrently 2011-08-26 12:47:43 +00:00
Ben Gras
f984dbba70 increase system-wide filename limit to 255
. move mfs-specific struct, constants to mfs/, so
	  mfs-specific, on-disk format structs and consts are
	  fully isolated from generic structs and functions
	. removes de and readfs utils
2011-08-17 16:00:01 +00:00
Evgeniy Ivanov
bc434254ea MFS: optimize dentry acllocation.
When search for free slot always cache position of last allocated slot,
so next time when need to allocate new slot, we can search from that
position.
2011-08-17 08:41:35 +00:00
Evgeniy Ivanov
426cddbb30 Add missing put_inode().
Fixes bug from a9a45cddc.
2011-08-15 16:20:06 +00:00
Evgeniy Ivanov
a9a45cddc4 Fix bugs found in MFS by clang static analyzer. 2011-08-10 20:47:16 +00:00
Thomas Veerman
7588db2691 Add support for VFS-FS transaction IDs 2011-07-27 15:49:42 +00:00
Evgeniy Ivanov
255ae85b1e Fix time modification on truncate()
POSIX truncate specification says "Upon successful completion, if
the *file size is changed*, this function shall mark for update the
st_ctime and st_mtime fields of the file." This patch prevents
changing of the date fields when the size stays the same.
2011-07-15 14:21:05 +00:00
Ben Gras
253c293213 mfs<->vfs stat fallback for old vfs 2011-07-12 18:09:52 +02:00
Evgeniy Ivanov
ef0a265086 New stat structure.
* VFS and installed MFSes must be in sync before and after this change *

Use struct stat from NetBSD. It requires adding new STAT, FSTAT and LSTAT
syscalls. Libc modification is both backward and forward compatible.

Also new struct stat uses modern field sizes to avoid ABI
incompatibility, when we update uid_t, gid_t and company.
Exceptions are ino_t and off_t in old libc (though paddings added).
2011-07-12 16:39:55 +02:00
Ben Gras
9c01ceb576 introduce sqrt_approx() in -lsys
. use this to avoid -lm dependency in mfs
2011-07-04 02:51:12 +02:00
Arun Thomas
93ae43f577 boot: Add multiboot support
Not yet fully spec-compliant; work in progress
2011-06-24 17:21:51 +02:00
Gianluca Guida
cc17b27a2b Build NetBSD libc library in world in ELF mode.
3 sets of libraries are built now:
  . ack: all libraries that ack can compile (/usr/lib/i386/)
  . clang+elf: all libraries with minix headers (/usr/lib/)
  . clang+elf: all libraries with netbsd headers (/usr/netbsd/)

Once everything can be compiled with netbsd libraries and headers, the
/usr/netbsd hierarchy will be obsolete and its libraries compiled with
netbsd headers will be installed in /usr/lib, and its headers
in /usr/include. (i.e. minix libc and current minix headers set
will be gone.)

To use the NetBSD libc system (libraries + headers) before
it is the default libc, see:
   http://wiki.minix3.org/en/DevelopersGuide/UsingNetBSDCode
This wiki page also documents the maintenance of the patch
files of minix-specific changes to imported NetBSD code.

Changes in this commit:
  . libsys: Add NBSD compilation and create a safe NBSD-based libc.
  . Port rest of libraries (except libddekit) to new header system.
  . Enable compilation of libddekit with new headers.
  . Enable kernel compilation with new headers.
  . Enable drivers compilation with new headers.
  . Port legacy commands to new headers and libc.
  . Port servers to new headers.
  . Add <sys/sigcontext.h> in compat library.
  . Remove dependency file in tree.
  . Enable compilation of common/lib/libc/atomic in libsys
  . Do not generate RCSID strings in libc.
  . Temporarily disable zoneinfo as they are incompatible with NetBSD format
  . obj-nbsd for .gitignore
  . Procfs: use only integer arithmetic. (Antoine Leca)
  . Increase ramdisk size to create NBSD-based images.
  . Remove INCSYMLINKS handling hack.
  . Add nbsd_include/sys/exec_elf.h
  . Enable ELF compilation with NBSD libc.
  . Add 'make nbsdsrc' in tools to download reference NetBSD sources.
  . Automate minix-port.patch creation.
  . Avoid using fstavfs() as it is *extremely* slow and unneeded.
  . Set err() as PRIVATE to avoid name clash with libc.
  . [NBSD] servers/vm: remove compilation warnings.
  . u32 is not a long in NBSD headers.
  . UPDATING info on netbsd hierarchy
  . commands fixes for netbsd libc
2011-06-24 11:46:30 +02:00
Ben Gras
a77c2973b3 fix clang warnings -R in kernel/ and servers/ 2011-06-09 16:09:13 +02:00
David van Moolenbroek
c51cd5fe91 Server/driver protocols: no longer allow third-party copies.
Before safecopies, the IO_ENDPT and DL_ENDPT message fields were needed
to know which actual process to copy data from/to, as that process may
not always be the caller. Now that we have full safecopy support, these
fields have become useless for that purpose: the owner of the grant is
*always* the caller. Allowing the caller to supply another endpoint is
in fact dangerous, because the callee may then end up using a grant
from a third party. One could call this a variant of the confused
deputy problem.

From now on, safecopy calls should always use the caller's endpoint as
grant owner. This fully obsoletes the DL_ENDPT field in the
inet/ethernet protocol. IO_ENDPT has other uses besides identifying the
grant owner though. This patch renames IO_ENDPT to USER_ENDPT, not only
because that is a more fitting name (it should never be used for I/O
after all), but also in order to intentionally break any old system
source code outside the base system. If this patch breaks your code,
fixing it is fairly simple:

- DL_ENDPT should be replaced with m_source;
- IO_ENDPT should be replaced with m_source when used for safecopies;
- IO_ENDPT should be replaced with USER_ENDPT for any other use, e.g.
  when setting REP_ENDPT, matching requests in CANCEL calls, getting
  DEV_SELECT flags, and retrieving of the real user process's endpoint
  in DEV_OPEN.

The changes in this patch are binary backward compatible.
2011-04-11 17:35:05 +00:00
Ben Gras
c90cdadcfb auto-tune mfs cache size based on FS usage and remaining system memory 2011-02-28 14:19:19 +00:00
Ben Gras
dc1cc91df1 <ansi.h> -> <minix/ansi.h> 2011-01-28 11:35:02 +00:00
David van Moolenbroek
5d8d5e0c3a change bitchunk_t from 16-bit to 32-bit 2010-12-21 10:44:45 +00:00
Dirk Vogt
9ed280d1ec decouple file system server start/termination from mount/umount 2010-11-23 19:34:56 +00:00
Ben Gras
b653422883 mfs - no more WRITE_IMMED 2010-10-11 15:35:43 +00:00
Thomas Veerman
af73996d51 Fix failing unmount attempt at shutdown after running test58 2010-09-17 09:34:36 +00:00
Thomas Veerman
0b00cf70b6 - Return ENOENT when trying to add files to removed (but open) directories.
- Add test58 to test this behavior.
2010-09-01 09:07:18 +00:00
Erik van der Kouwe
0fc71a1154 Increase NR_INODES in the FS servers to match NR_VNODES in VFS 2010-08-05 11:37:37 +00:00
Erik van der Kouwe
912b4e0cb7 Return ENOSPC when out of inodes 2010-08-05 11:37:06 +00:00
Thomas Veerman
34a2864e27 Fix a few compile time warnings 2010-07-02 12:41:19 +00:00
Arun Thomas
c0c8d25799 Rename mkfiles from minix.*.mk to bsd.*.mk
Makes things easier for pkgsrc
2010-06-25 18:29:09 +00:00
Ben Gras
33c9d427fd mfs - added put_block() to statvfs loop. 2010-06-24 10:56:45 +00:00
Erik van der Kouwe
498d7d8a4c Don't use kernel responses in servers 2010-06-24 07:37:26 +00:00
Ben Gras
491efeead9 mfs - revert part of previous commit; should not have been commited 2010-06-24 00:32:17 +00:00
Ben Gras
6cd2d1218e mfs - statvfs call, by Buccapatnam Tirumala, Gautam. 2010-06-23 23:58:16 +00:00
Ben Gras
13b5dd4a82 statvfs/fstatvfs entries. 2010-06-23 23:56:36 +00:00
Ben Gras
a89bcc465b mfs: minor cleanup of readahead: they can be private to read.c. 2010-06-21 18:25:04 +00:00
Thomas Veerman
be6490f4b3 Turn off debug message. 2010-06-09 11:05:16 +00:00
Thomas Veerman
a0eaaa5c9f Fix a bug in put_inode that causes corruption to the file system and another
bug that causes problems when files grow bigger than a certain threshold. Also
fix a few type and code inconsistencies.
2010-06-09 09:56:43 +00:00
Arun Thomas
4c10a31440 Remove legacy MM, FS, and FS_PROC_NR macros 2010-06-08 13:58:01 +00:00
Kees van Reeuwijk
ed0b81c25c Removed some unused variables and functions. 2010-06-02 19:41:38 +00:00
Thomas Veerman
6bbcab3ec4 Clean up MFS a bit:
- Remove unused includes.
 - Add include guards to headers.
 - Use unsigned variables in case they're never going to hold a negative
   value. This causes GCC's complaints to disappear and should make flexelint
   a lot happier, too.
 - Make functions private when they're used only within a module.
 - Remove unused variables.
 - Add casts where appropriate.
2010-06-01 12:35:33 +00:00
Arun Thomas
007104d60e GCC build fixes/updates
-Set stack sizes for boot image processes
-Increase RS stack size
-Reduce ramdisk size
-HARDWARE task should use kernel stack
-Minor asm tweaks for leading underscores
2010-05-26 18:45:55 +00:00
Kees van Reeuwijk
ac14a989b3 Fixed some inconsistent strict typing declarations.
Better strict typing.
2010-05-25 07:23:24 +00:00
Tomas Hruby
6e25ad8b0a Use of all NIL_* defines converted to NULL 2010-05-10 13:26:00 +00:00