Commit graph

197 commits

Author SHA1 Message Date
Ben Gras
34a8901eb8 vfs,avfs: verify an interpreter was found on #! line
. if not, NULL *interp is dereferenced
2011-12-21 23:44:13 +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
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
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
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
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
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
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
Thomas Veerman
d4b72e81b2 Cleanup servers to make GCC/Clang a little happier 2011-09-08 13:57:03 +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
Arun Thomas
86b061078b Build gcov code only if MKCOVERAGE is yes 2011-08-09 10:39:33 +02:00
Ben Gras
c4ea2a195c getsid() implementation 2011-08-02 22:16:59 +02:00
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
Thomas Veerman
902e0e27e0 Don't panic if owner has vanished before reply 2011-07-15 14:11:34 +00:00
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
a9d15dd3e4 pm, vfs: don't print something for bogus calls 2011-07-05 13:21:48 +02:00
Ben Gras
86a226680b vfs: don't SUSPEND for unknown calls
. returning ENOSYS helps for implementing
	  new calls with forwards compatability
2011-07-02 17:19:13 +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
Ben Gras
674cd6fd48 larger i/o buffer for exec()
. makes exec() for large executables (e.g. clang, gcc)
    significantly faster

Thanks to Antoine Leca.
2011-05-12 19:12:28 +02:00
Thomas Veerman
aba392e630 Clean up and fix multiple bugs in select:
- Remove redundant code.
 - Always wait for the initial reply from an asynchronous select request,
   even if the select has been satisfied on another file descriptor or
   was canceled due to a serious error.
 - Restart asynchronous selects if upon reply from the driver turns out
   that there are deferred operations (and do not forget we're still
   interested in the results of the deferred operations).
 - Do not hang a non-blocking select when another blocking select on
   the same filp is still blocking.
 - Split blocking operations in read, write, and exceptions (i.e.,
   blocking on read does not imply the write will block as well).
 - Some loops would iterate over OPEN_MAX file descriptors instead of
   the "highest" file descriptor.
 - Use proper internal error return values.
 - A secondary reply from a synchronous driver is essentially the same
   as from an asynchronous driver (the only difference being how the 
   answer is received). Merge.
 - Return proper error code after a driver failure.
 - Auto-detect whether a driver is synchronous or asynchronous.
 - Remove some code duplication.
 - Clean up code (coding style, add missing comments, put all select
   related code together).
2011-04-13 13:25:34 +00:00
Thomas Veerman
f0740680cd Do not print an error message when a binary is corrupt 2011-04-12 13:09:19 +00:00
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
Arun Thomas
cd9b4b46f4 libexec: return physaddr info from ELF headers 2011-04-07 12:22:36 +00:00
David van Moolenbroek
28f2a169da VFS: bugfixes for handling block-special files:
- on driver restarts, reopen devices on a per-file basis, not per-mount
- do not assume that there is just one vnode per block-special device
- update block-special files in the uncommon mounting success paths, too
- upon mount, sync but also invalidate affected buffers on the root FS
- upon unmount, check whether a vnode is in use before updating it
2011-03-25 10:56:43 +00:00
Erik van der Kouwe
36f9c1155a Restart process after response from async driver on non-blocking select 2011-02-23 10:27:48 +00:00
Ben Gras
287fee89cb add NOASSERTS make flag that disables assert()s (NDEBUG=1).
. made some checks in vfs/vnode.c also respond to NDEBUG=1.
  . turned on in release builds
2011-02-16 18:58:30 +00:00
Ben Gras
dc1cc91df1 <ansi.h> -> <minix/ansi.h> 2011-01-28 11:35:02 +00:00
Ben Gras
f0f34dd8d9 vfs - use a static buffer instead of malloc()+free(), solving
recently appeared ENOMEM problems during exec().
2010-12-15 14:43:59 +00:00
Arun Thomas
372b873413 VFS/RS support for ELF 2010-12-10 09:27:56 +00:00
Arun Thomas
cc26fb5ec4 vfs: terminate string in rdlink_direct
Fixes test56 when compiled with GCC.
2010-12-01 16:24:50 +00:00
Dirk Vogt
5e1e763506 removed unneeded global var 2010-11-24 16:30:13 +00:00
Dirk Vogt
9ed280d1ec decouple file system server start/termination from mount/umount 2010-11-23 19:34:56 +00:00
Arun Thomas
f0ab18377d GCC/clang: int64 routines in C 2010-11-12 18:38:10 +00:00
Erik van der Kouwe
9235536f38 Fix select-related bugs: missing cancellations led to potentially forgetting notifies, especially in the case of async drivers 2010-10-08 12:50:52 +00:00
David van Moolenbroek
354da24f5b make getsysinfo() a system-land call 2010-09-14 21:50:05 +00:00
Thomas Veerman
13ef7f1f38 Prepare VFS to support back calls from PFS. For security reasons and to support
file descriptor passing, PFS does some back calls to VFS. For example, to
verify the validity of a path provided by a process and to tell VFS it must
copy file descriptors from one process to another.
2010-08-30 13:44:07 +00:00
Ben Gras
5d6c2aae0a gcov support, based on work contributed by Anton Kuijsten. 2010-08-25 13:06:43 +00:00
Thomas Veerman
c8cfcab5db - Make sure there's space left in the vmnt table for another mount point.
- Increase mount point limit.
2010-08-17 10:02:50 +00:00
Ben Gras
3badab8b70 vfs - split fp_fd field into fd + callnr fields 2010-07-22 14:55:28 +00:00
Erik van der Kouwe
739f2d7536 Fix comment 2010-07-15 14:47:08 +00:00