Commit graph

1018 commits

Author SHA1 Message Date
Thomas Veerman
94da86cbee Discard process' pending request upon incoming PM request
When a process wants something done from VFS, but VFS has no worker
threads available, the request is stored and executed later. However,
when PM also sends a request for that process at the same time, discard
the pending request from the process and give priority to PM. The request
PM sends is either an EXIT or a DUMPCORE request, so we're not interested
in executing the pending request anyway.
2011-12-12 08:20:35 +00:00
David van Moolenbroek
35cf8beb33 procfs: add /proc/dmap 2011-12-11 22:35:33 +01:00
David van Moolenbroek
aa712e7e73 IS: unbreak F6 2011-12-11 22:34:54 +01:00
David van Moolenbroek
6f374faca5 Add "expected size" parameter to getsysinfo()
This patch provides basic protection against damage resulting from
differently compiled servers blindly copying tables to one another.
In every getsysinfo() call, the caller is provided with the expected
size of the requested data structure. The callee fails the call if
the expected size does not match the data structure's actual size.
2011-12-11 22:34:14 +01:00
David van Moolenbroek
9701e9dfd2 Servers: cleanup of some gcc -W warnings 2011-12-11 22:33:37 +01:00
Thomas Veerman
26d359a30c Properly unlock on mount failure 2011-12-09 15:47:42 +00:00
Thomas Veerman
5cbbfc69e7 Change asserts with side effects into panics 2011-12-09 14:46:10 +00:00
Thomas Veerman
706873142e Fix dangling symlink resolving for AVFS and add test61 2011-12-09 10:34:23 +00:00
Thomas Veerman
0a61519eea Provide core dumping support for AVFS 2011-12-08 10:47:11 +00:00
David van Moolenbroek
9221586f37 vfs/avfs: req_newdriver should use fs_sendrec
Using sendrec directly only results in problems. While it is not
clear whether using fs_sendrec is the best option, it is at least
an improvement.

Also remove some legacy cruft.
2011-12-05 16:28:09 +01:00
David van Moolenbroek
ba19c83fd6 RS: support for endpoint-changing driver restarts 2011-12-05 16:28:07 +01:00
David van Moolenbroek
01015cc0e2 init: write boot entry to root wtmp
This unbreaks the fsck check on startup.
2011-12-05 13:56:16 +01:00
David van Moolenbroek
db087efac4 VFS/FS: REQ_NEW_DRIVER now provides a label 2011-11-30 19:05:26 +01:00
Thomas Veerman
b4fb061802 Implement issetugid syscall
Implement issetugid syscall and provide a test. This gets rid of the
scary "Unsecure. Implement me" warning during compilation.
2011-11-28 10:03:43 +00:00
Ben Gras
ef99a7a3dc vm: report cropped region sizes
. when reporting on regions, only report part of the
	  region (addr and length) that really has memory mapped
	  into it
	. to minimise core files
2011-11-26 15:12:17 +00:00
David van Moolenbroek
a9f89a7290 vfs/avfs: map O_ACCMODE to R_BIT|W_BIT on recovery 2011-11-24 13:57:36 +01:00
David van Moolenbroek
e8f944d3ca avfs: unbreak process termination on PM_DUMPCORE 2011-11-24 13:04:52 +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
1e1db53986 Introduce sys_getregs call, and let vfs use it 2011-11-22 02:07:33 +01:00
Adriana Szekeres
c30f014a89 gcore command to coredump a process 2011-11-22 22:07:41 +01:00
Adriana Szekeres
eaa29370f4 ELF core files 2011-11-22 22:07:40 +01:00
David van Moolenbroek
f29ba928cc isofs: unbreak lseek 2011-11-22 11:46:55 +01:00
Ben Gras
c24d15b2db pm: add mproc table sanity check feature
. make procfs check it
	. detects pm/procfs mismatches
	. was triggered by ack/clang pm/procfs:
	  add padding to mproc struct to align ack/clang layout
	  to fix this
2011-11-18 17:18:10 +01:00
David van Moolenbroek
85b8fbe72b More cleanup of minix/com.h. 2011-11-11 13:53:29 +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
David van Moolenbroek
0bb27bb0b1 Servers: remove ABI comment 2011-11-07 22:24:59 +01:00
David van Moolenbroek
b02c260ecb Miscellaneous legacy cleanup 2011-11-07 22:20:55 +01:00
David van Moolenbroek
2602861f23 Move optset.c into libsys; remove redundant copies 2011-11-07 16:16:08 +01:00
Ben Gras
c83a90e2f1 mfs: ditch global readahead 2011-11-06 19:15:12 +01:00
David van Moolenbroek
0812293b47 procfs: fix for PID reuse between updates
In certain cases, a process ID may be reused between two lazy updates
of procfs's PID table. If the new associated process slot has a lower
index than the old one, this will trigger an assert in vtreefs, as the
new PID name entry is added before the old one is removed. This patch
fixes the problem by always first removing old PID name entries before
adding new ones.

Bug reported by Stephen Hatton.
2011-11-01 23:50:55 +00:00
Arun Thomas
62841e2935 pm: remove dead minix_munmap functions 2011-11-02 18:43:59 +01:00
Thomas Veerman
65e54c23e3 PFS is also a system proc 2011-10-28 12:49:47 +00:00
Thomas Veerman
febb4403ff Reenable backcall detection 2011-10-27 15:29:37 +00:00
Thomas Veerman
823e42c3e3 Make AVFS deal intelligently with back calling FSes
PUFFS file systems need to make back calls for every operation we
send to them. Consequently, they cannot handle block reads and writes
themselves. Instead, the root file system has to do it (for now).

When the mount operation causes an FS to make a back call, AVFS now
concludes that every block read and write for that FS has to go
through the root file system.
2011-10-27 15:29:23 +00:00
Antoine LECA
b1c2329954 clean up PM_SCHEDULED 2011-10-25 16:37:21 +00:00
Thomas Veerman
9e21d55e37 err_code has to be preserved as well. Short term fix 2011-10-25 12:12:20 +00:00
Thomas Veerman
8c9e62b299 Revert to using flushtlb instead of invlpg
Somehow the usage of invlpg causes Minix to crash on Qemu. Reverting
temporarily until we have a proper fix.
2011-09-27 15:15:51 +00:00
Ben Gras
49532259e5 mfs: improve & simplify secondary cache logic
. fixes "!" errors when booting from cd
2011-09-23 15:02:20 +00:00
Ben Gras
833183a9e1 vm: undo accidental JUNKFREE on 2011-09-19 15:36:46 +00:00
Ben Gras
1dfd43ac27 boot e820 memory detection fixes 2011-09-19 13:36:03 +00:00
Arun Thomas
cb54d96eec Remove legacy boot monitor vars 2011-09-16 20:10:47 +02:00
Thomas Veerman
90cde23c19 Cleanup more resources upon exit 2011-09-16 10:16:57 +00:00
Thomas Veerman
1c928cf61a Remove debug print 2011-09-16 10:16:32 +00:00
Thomas Veerman
200b9d7339 Unmap drivers upon exit 2011-09-16 10:16:00 +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
98233fa144 ext2: replace debug printf by assert 2011-09-09 16:33:55 +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
d4b72e81b2 Cleanup servers to make GCC/Clang a little happier 2011-09-08 13:57:03 +00:00
Thomas Veerman
f78fb05676 Check group range for sanity 2011-09-08 12:23:03 +00:00
Arun Thomas
8a0901c4cb Add MKTRACE 2011-09-07 17:52:48 +02:00
Thomas Veerman
7db039347a Make AVFS resilient against failing back calls 2011-09-06 10:38:16 +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
fde9a258d0 Make dev_t 32-bits and provide backwards compatibility 2011-09-05 08:52:57 +00:00
Arun Thomas
4ca68d42a0 Add MKLIVEUPDATE and MKSTATECTL 2011-09-02 16:57:22 +02:00
Evgeniy Ivanov
4806f7c308 Fix ext2 symlink bug.
rip->i_size is a target length without trailing '\0'.

Reported by Ben Gras.
2011-08-29 21:54:25 +00:00
Thomas Veerman
7f24c2b3ca Unverbose mount 2011-08-26 15:49:37 +00:00
Thomas Veerman
78183bddff Let FSes exit themselves upon system shutdown
During shutdown all processes are semi-exited and FSes are unmounted.
This semi-exit causes trouble for FUSE mounts as they still need access
to file descriptors and working directory in order to unmount.
2011-08-26 15:17:53 +00:00
Thomas Veerman
8a73de51f1 Tell VFS how many requests an FS can handle concurrently 2011-08-26 12:47:43 +00:00
Thomas Veerman
30be017762 Store and use max concurrent requests 2011-08-26 12:47:43 +00:00
Thomas Veerman
c78308f469 Increase max number of arguments 2011-08-22 13:44:24 +00:00
Thomas Veerman
e09714ab53 Turn off block read debugs and turn on mount debugs 2011-08-22 13:24:35 +00:00
Thomas Veerman
4ee157f5ce Report error instead panicing 2011-08-22 13:08:38 +00:00
Thomas Veerman
1f28a4b83e Remove verbosity 2011-08-22 13:08:03 +00:00
Thomas Veerman
68011701bd Reduce block special file (thread) lock scope 2011-08-22 11:51:29 +00:00
Thomas Veerman
55d926cbaa Allow block special files to be file locked 2011-08-22 11:51:01 +00:00
Thomas Veerman
ae2159c371 Fix locking issues with back calls from FSes 2011-08-19 14:17:35 +00:00
Ben Gras
cc64313b80 is: stopgap for broken _USEVFS check 2011-08-17 16:27:46 +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
Thomas Veerman
a18a007361 Range fix from PFS 2011-08-17 13:42:38 +00:00
Thomas Veerman
a6bd3f4a22 Merge AVFS and APFS 2011-08-17 13:40:36 +00:00
Ben Gras
ee48228aa0 pfs: fix range check
. debugged and fixed by Jan Wieck
2011-08-17 12:39:33 +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
13ded5339f Fix ext2 dentry allocation glitch.
When remove dentry, check if cached position is greater than removed
one.
2011-08-15 17:33:51 +00:00
Evgeniy Ivanov
426cddbb30 Add missing put_inode().
Fixes bug from a9a45cddc.
2011-08-15 16:20:06 +00:00
Ben Gras
35cc7fbeb8 kernel: invlpg facility
. only use for single-page invalidations initially
	. shows tiny but statistically significant performance
	  improvement; will be more helpful in certain VM debug
	  modes
2011-08-12 13:08:27 +00:00
Evgeniy Ivanov
55c6f3f507 Fix bugs in ext2 found by clang static analyzer 2011-08-12 12:38:53 +00:00
Arun Thomas
9602f63a72 pm: remove dead function 2011-08-11 17:51:27 +02:00
Evgeniy Ivanov
a9a45cddc4 Fix bugs found in MFS by clang static analyzer. 2011-08-10 20:47:16 +00:00
Arun Thomas
86b061078b Build gcov code only if MKCOVERAGE is yes 2011-08-09 10:39:33 +02:00
Ben Gras
d477a9ed82 vm/ipc: only report signals when it matters to ipc
. ipc wants to know about processes that get
	  signals, so that it can break blocking ipc operations
	. doing it for every single signal is wasteful
	  and causes the annoying 'no slot for signals' message
	. this fix tells vm on a per-process basis it (ipc)
	  wants to be notified, i.e. only when it does any ipc calls
	. move ipc config to separate config file while we're at it
2011-08-05 20:52:32 +00:00
Ben Gras
c4ea2a195c getsid() implementation 2011-08-02 22:16:59 +02:00
Arun Thomas
aaefc6f838 Add MKMCONTEXT option 2011-08-02 13:57:31 +02:00
Ben Gras
989934b37c rename -lutil to -lminixutil
. in preparation for netbsd -lutil
2011-08-01 14:32:14 +02:00
Thomas Veerman
7588db2691 Add support for VFS-FS transaction IDs 2011-07-27 15:49:42 +00:00
Thomas Veerman
ece4c9d565 Add DEV_CLONE_A dev type 2011-07-27 12:23:03 +00:00
Arun Thomas
530bd5d486 vfs/rs: for ELF, sep_id should be 0 2011-07-26 15:21:07 +02:00
Ben Gras
3dd7649ae7 RS: fix bug that overflows r_argv[]
. reported and debugged by Arne Welzel
	. problem is if there are too many args
	. there is a check, but then unconditional NULL termination
2011-07-21 08:08:22 +02:00
Arun Thomas
3eb22ca4d1 MK option to build only system image programs 2011-07-20 09:57:46 +02:00
Erik van der Kouwe
b1408f61b4 Sanity checks prevent VM panic for mmap, vm_remap and map_phys 2011-07-19 08:58:01 +02:00
Ben Gras
832f7f99fd vm: munmap fix leftover 2011-07-18 12:03:58 +02:00
Ben Gras
02081e4b62 rename mmap() and munmap()
. it's a good extra interface to have but doesn't
	  meet standardised functionality
	. applications (in pkgsrc) find it and expect
	  full functionality the minix mmap doesn't offter
	. on the whole probably better to hide these functions
	  (mmap and friends) until they are grown up; the base system
	  can use the new minix_* names
2011-07-16 13:01:19 +02:00
Ben Gras
85f6d866e6 rename mmap MAP_SHARED to MAP_IPC_SHARED
. MAP_SHARED was used to implement sysv shared memory
	. used to signal shareable memory region to VM
	. assumptions about this situation break when processes
	  use MAP_SHARED for its normal, standardised meaning
2011-07-15 18:10:50 +02:00
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
Thomas Veerman
902e0e27e0 Don't panic if owner has vanished before reply 2011-07-15 14:11:34 +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
Arun Thomas
b956c8735e Fix GCC image building 2011-07-09 15:04:42 +02:00
Ben Gras
a9d15dd3e4 pm, vfs: don't print something for bogus calls 2011-07-05 13:21:48 +02:00