This allows us to:
- perform scatter gather operations without using temporary files,
- create non-linear pipelines, and
- implement file views using symbolic links.
File view idea by: Vassilios Karakoidas
Portalfs pointer by: John Ioannidis
MFC after: 1 month
remove all the code which was trying to do so.
This code was nasty in several ways, it was hiding
the kernel bug where the kernel was unable to properly
load a module, and it was quitting if it wasn't able
to load the module. The consequence is that an ABI
breakage of the vfsconf API would have broken *every*
mount utility.
1) Allow the sending of more than one control message at a time
over a unix domain socket. This should cover the PR 29499.
2) This requires that unp_{ex,in}ternalize and unp_scan understand
mbufs with more than one control message at a time.
3) Internalize and externalize used to work on the mbuf in-place.
This made life quite complicated and the code for sizeof(int) <
sizeof(file *) could end up doing the wrong thing. The patch always
create a new mbuf/cluster now. This resulted in the change of the
prototype for the domain externalise function.
4) You can now send SCM_TIMESTAMP messages.
5) Always use CMSG_DATA(cm) to determine the start where the data
in unp_{ex,in}ternalize. It was using ((struct cmsghdr *)cm + 1)
in some places, which gives the wrong alignment on the alpha.
(NetBSD made this fix some time ago).
This results in an ABI change for discriptor passing and creds
passing on the alpha. (Probably on the IA64 and Spare ports too).
6) Fix userland programs to use CMSG_* macros too.
7) Be more careful about freeing mbufs containing (file *)s.
This is made possible by the prototype change of externalise.
PR: 29499
MFC after: 6 weeks
systems were repo-copied from sys/miscfs to sys/fs.
- Renamed the following file systems and their modules:
fdesc -> fdescfs, portal -> portalfs, union -> unionfs.
- Renamed corresponding kernel options:
FDESC -> FDESCFS, PORTAL -> PORTALFS, UNION -> UNIONFS.
- Install header files for the above file systems.
- Removed bogus -I${.CURDIR}/../../sys CFLAGS from userland
Makefiles.
Made mount more userfriendly (bad slashes are now filtered out)
and we remove in mount_nfs trailing slashes if there are any.
Fixed mount_xxx binarys to resolve with realpath(3)
the mountpoint.
Translate the deprecated nfs-syntax with '@' to ':' .
The ':' syntax has now precedence, but '@' still works.
Notify the user that the '@' syntax should not be used.
PR: 7846
PR: 13692
Submitted by: Martin Blapp <mb@imp.ch>
Reviewed by: phk
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.
Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.
for gcc >= 2.5 and no-ops for gcc >= 2.6. Converted to use __dead2
or __pure2 where it wasn't already done, except in math.h where use
of __pure was mostly wrong.
mount_* programs. While we're at it, collapse the four now-identical
mount programs for devfs, fdesc, kernfs, and procfs into links to
a new mount_std(8) which can mount any really generic filesystem
such as these when called with the appropriate argv[0].
Also, convert the mount programs to use sysexits.h.
- in mount_portal.c: included catching of SIGHUP to get portald to
re-read the config file.
- in mount_portal.c: in SIGCHLD handler the return values checked from
waitpid were wrong. Note. this routine was written correclty according
to the manual page for 4.4BSD, but waitpid does not exhibit this
behaviour. It is not returning 0 when WNOHANG is specified. I havent
checked this properly.
- in mount_portal.c: initialized the fdset for the select properly.
- in mount_portal.c: corrected poor casting in the select.
- in mount_portal.c: changed a break; to exit (0); so that the
children die after doing the hard work, this stops the select: bad
file descriptor messages.
- in pt_file.c: the kernel passes kernel style open flags to the
portal code which aren't compatible with "normal" O_ flags. I have
adjusted these in pt_file.c. In general I think the portal fs code
and portal_cred structure need changing to pass to the portald
the right style of flags _and_ the permissions.
- in pt_tcp.c: a few mistakes in typing of the socket structures,
getservbyname returns the port number as an int but sockaddr wants
the port number as an u_short.
- in pt_tcp.c: someone wrote this on a VAX/Sun whatever and forget
about byte ordering!! I've included a few htons about the place.
- in all the above I have sprinkled a few more debugging printf's.
Submitted by: "Duncan McL Barclay" <dmlb@ohm.york.ac.uk
