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* nmount'ify unionfs further by using separate options insteadmux2002-06-151-5/+16
| | | | | | | of passing a flags mount options. This removes the include of sys/fs/unionfs/union.h in mount_unionfs as it should be. Reviewed by: phk
* Convert unionfs to nmount.mux2002-05-241-20/+22
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* Remove __P.alfred2002-03-191-8/+8
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* Simple p_ucred -> td_ucred changes to start using the per-thread ucredjhb2002-02-271-1/+1
| | | | reference.
* SMP Lock struct file, filedesc and the global file list.alfred2002-01-131-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Seigo Tanimura (tanimura) posted the initial delta. I've polished it quite a bit reducing the need for locking and adapting it for KSE. Locks: 1 mutex in each filedesc protects all the fields. protects "struct file" initialization, while a struct file is being changed from &badfileops -> &pipeops or something the filedesc should be locked. 1 mutex in each struct file protects the refcount fields. doesn't protect anything else. the flags used for garbage collection have been moved to f_gcflag which was the FILLER short, this doesn't need locking because the garbage collection is a single threaded container. could likely be made to use a pool mutex. 1 sx lock for the global filelist. struct file * fhold(struct file *fp); /* increments reference count on a file */ struct file * fhold_locked(struct file *fp); /* like fhold but expects file to locked */ struct file * ffind_hold(struct thread *, int fd); /* finds the struct file in thread, adds one reference and returns it unlocked */ struct file * ffind_lock(struct thread *, int fd); /* ffind_hold, but returns file locked */ I still have to smp-safe the fget cruft, I'll get to that asap.
* Change the vnode list under the mount point from a LIST to a TAILQdillon2001-10-231-1/+1
| | | | | | in preparation for an implementation of limiting code for kern.maxvnodes. MFC after: 3 days
* Change the kernel's ucred API as follows:jhb2001-10-111-2/+1
| | | | | | | | - crhold() returns a reference to the ucred whose refcount it bumps. - crcopy() now simply copies the credentials from one credential to another and has no return value. - a new crshared() primitive is added which returns true if a ucred's refcount is > 1 and false (0) otherwise.
* KSE Milestone 2julian2001-09-121-17/+17
| | | | | | | | | | | | | | Note ALL MODULES MUST BE RECOMPILED make the kernel aware that there are smaller units of scheduling than the process. (but only allow one thread per process at this time). This is functionally equivalent to teh previousl -current except that there is a thread associated with each process. Sorry john! (your next MFC will be a doosie!) Reviewed by: peter@freebsd.org, dillon@freebsd.org X-MFC after: ha ha ha ha
* Protect the mnt_vnode list with the mntvnode lock.jhb2001-06-281-0/+4
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* Actually rename FDESC, PORTAL, UMAP and UNION file systems.ru2001-05-241-1/+1
| | | | OK'ed by: bp
* - FDESC, FIFO, NULL, PORTAL, PROC, UMAP and UNION fileru2001-05-231-1/+1
| | | | | | | | | | | | | | | 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.
* Change the second argument of vflush() to an integer that specifiesiedowse2001-05-161-24/+6
| | | | | | | | | | | | | | | | | | | | the number of references on the filesystem root vnode to be both expected and released. Many filesystems hold an extra reference on the filesystem root vnode, which must be accounted for when determining if the filesystem is busy and then released if it isn't busy. The old `skipvp' approach required individual filesystem xxx_unmount functions to re-implement much of vflush()'s logic to deal with the root vnode. All 9 filesystems that hold an extra reference on the root vnode got the logic wrong in the case of forced unmounts, so `umount -f' would always fail if there were any extra root vnode references. Fix this issue centrally in vflush(), now that we can. This commit also fixes a vnode reference leak in devfs, which could result in idle devfs filesystems that refuse to unmount. Reviewed by: phk, bp
* Reviewed by: jlemonadrian2001-03-011-3/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | An initial tidyup of the mount() syscall and VFS mount code. This code replaces the earlier work done by jlemon in an attempt to make linux_mount() work. * the guts of the mount work has been moved into vfs_mount(). * move `type', `path' and `flags' from being userland variables into being kernel variables in vfs_mount(). `data' remains a pointer into userspace. * Attempt to verify the `type' and `path' strings passed to vfs_mount() aren't too long. * rework mount() and linux_mount() to take the userland parameters (besides data, as mentioned) and pass kernel variables to vfs_mount(). (linux_mount() already did this, I've just tidied it up a little more.) * remove the copyin*() stuff for `path'. `data' still requires copyin*() since its a pointer into userland. * set `mount->mnt_statf_mntonname' in vfs_mount() rather than in each filesystem. This variable is generally initialised with `path', and each filesystem can override it if they want to. * NOTE: f_mntonname is intiailised with "/" in the case of a root mount.
* Mechanical change to use <sys/queue.h> macro API instead ofphk2001-02-041-2/+2
| | | | | | | fondling implementation details. Created with: sed(1) Reviewed by: md5(1)
* Convert more malloc+bzero to malloc+M_ZERO.dwmalone2000-12-081-3/+1
| | | | | Submitted by: josh@zipperup.org Submitted by: Robert Drehmel <robd@gmx.net>
* Remove unneeded #include <vm/vm_zone.h>phk2000-04-301-1/+0
| | | | Generated by: src/tools/tools/kerninclude
* Second pass commit to introduce new ACL and Extended Attribute systemrwatson1999-12-191-0/+2
| | | | | | | calls, vnops, vfsops, both in /kern, and to individual file systems that require a vfsop_ array entry. Reviewed by: eivind
* Introduce NDFREE (and remove VOP_ABORTOP)eivind1999-12-151-0/+2
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* Lock reporting and assertion changes.eivind1999-12-111-3/+6
| | | | | | | | | | | | | | | * lockstatus() and VOP_ISLOCKED() gets a new process argument and a new return value: LK_EXCLOTHER, when the lock is held exclusively by another process. * The ASSERT_VOP_(UN)LOCKED family is extended to use what this gives them * Extend the vnode_if.src format to allow more exact specification than locked/unlocked. This commit should not do any semantic changes unless you are using DEBUG_VFS_LOCKS. Discussed with: grog, mch, peter, phk Reviewed by: peter
* This is a major fixup of unionfs. At least 30 serious bugs have beendillon1999-09-261-68/+58
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | fixed (many due to changing semantics in other parts of the kernel and not the original author's fault), including one critical one: unionfs could cause UFS corruption in the fronting store due to calling VOP_OPEN for writing without turning on vmio for the UFS vnode. Most of the bugs were related to semantics changes in VOP calls, lock ordering problems (causing deadlocks), improper handling of a read-only backing store (such as an NFS mount), improper referencing and locking of vnodes, not using real struct locks for vnode locking, not using recursive locks when accessing the fronting store, and things like that. New functionality has been added: unionfs now has mmap() support, but only partially tested, and rename has been enhanced considerably. There are still some things that unionfs cannot do. You cannot rename a directory without confusing unionfs, and there are issues with softlinks, hardlinks, and special files. unionfs mostly doesn't understand them (and never did). There are probably still panic situations, but hopefully no where near as many as before this commit. The unionfs in this commit has been tested overlayed on /usr/src (backing /usr/src being a read-only NFS mount, fronting /usr/src being a local filesystem). kernel builds have been tested, buildworld is undergoing testing. More testing is necessary.
* Seperate the export check in VFS_FHTOVP, exports are now checked viaalfred1999-09-111-1/+2
| | | | | | | | | VFS_CHECKEXP. Add fh(open|stat|stafs) syscalls to allow userland to query filesystems based on (network) filehandle. Obtained from: NetBSD
* All unimplemented VFS ops now have entries in kern/vfs_default.c that returnalfred1999-09-071-49/+6
| | | | | | | | | | | | | reasonable defaults. This avoids confusing and ugly casting to eopnotsupp or making dummy functions. Bogus casting of filesystem sysctls to eopnotsupp() have been removed. This should make *_vfsops.c more readable and reduce bloat. Reviewed by: msmith, eivind Approved by: phk Tested by: Jeroen Ruigrok/Asmodai <asmodai@wxs.nl>
* Changed old-style option UNION_DIAGNOSTIC to DEBUG and fixed printfbde1999-08-291-10/+9
| | | | | | | format errors exposed by this. It has nothing to do with diagnostics since it does little more than control tracing of normal operation. Actual diagnostics for the union file system are still controlled by the DIAGNOSTIC option.
* $Id$ -> $FreeBSD$peter1999-08-281-1/+1
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* Fix warnings in preparation for adding -Wall -Wcast-qual to thedillon1999-01-271-2/+2
| | | | kernel compile
* Removed statically configured mount type numbers (MOUNT_*) and allbde1998-09-071-2/+2
| | | | | | | | | references to them. The change a couple of days ago to ignore these numbers in statically configured vfsconf structs was slightly premature because the cd9660, cfs, devfs, ext2fs, nfs vfs's still used MOUNT_* instead of the number in their vfsconf struct.
* As described by the submitter:msmith1998-05-061-18/+1
| | | | | | | | | | | | | Reverse the VFS_VRELE patch. Reference counting of vnodes does not need to be done per-fs. I noticed this while fixing vfs layering violations. Doing reference counting in generic code is also the preference cited by John Heidemann in recent discussions with him. The implementation of alternative vnode management per-fs is still a valid requirement for some filesystems but will be revisited sometime later, most likely using a different framework. Submitted by: Michael Hancock <michaelh@cet.co.jp>
* Seventy-odd "its" / "it's" typos in comments fixed as per kern/6108.des1998-04-171-2/+2
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* The intent is to get rid of WILLRELE in vnode_if.src by makingmsmith1998-03-011-1/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | a complement to all ops that return a vpp, VFS_VRELE. This is initially only for file systems that implement the following ops that do a WILLRELE: vop_create, vop_whiteout, vop_mknod, vop_remove, vop_link, vop_rename, vop_mkdir, vop_rmdir, vop_symlink This is initial DNA that doesn't do anything yet. VFS_VRELE is implemented but not called. A default vfs_vrele was created for fs implementations that use the standard vnode management routines. VFS_VRELE implementations were made for the following file systems: Standard (vfs_vrele) ffs mfs nfs msdosfs devfs ext2fs Custom union umapfs Just EOPNOTSUPP fdesc procfs kernfs portal cd9660 These implementations may change as VOP changes are implemented. In the next phase, in the vop implementations calls to vrele and the vrele part of vput will be moved to the top layer vfs_vnops and made visible to all layers. vput will be replaced by unlock in these cases. Unlocking will still be done in the per fs layer but the refcount decrement will be triggered at the top because it doesn't hurt to hold a vnode reference a little longer. This will have minimal impact on the structure of the existing code. This will only be done for vnode arguments that are released by the various fs vop implementations. Wider use of VFS_VRELE will likely require restructuring of the code. Reviewed by: phk, dyson, terry et. al. Submitted by: Michael Hancock <michaelh@cet.co.jp>
* Deleted unused variable.kato1998-02-101-2/+1
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* Back out DIAGNOSTIC changes.eivind1998-02-061-3/+1
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* Turn DIAGNOSTIC into a new-style option.eivind1998-02-041-1/+3
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* Improve and revise fixes for locking violation.kato1998-01-181-23/+17
| | | | Obtained from: NetBSD/pc98
* Staticize.phk1997-11-181-14/+12
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* Last major round (Unless Bruce thinks of somthing :-) of malloc changes.phk1997-10-121-4/+6
| | | | | | | | Distribute all but the most fundamental malloc types. This time I also remembered the trick to making things static: Put "static" in front of them. A couple of finer points by: bde
* Clustered read and write are switched at mount-option level.kato1997-09-271-1/+6
| | | | | | | | | | | | | | | | 1. Clustered I/O is switched by the MNT_NOCLUSTERR and MNT_NOCLUSTERW bits of the mnt_flag. The sysctl variables, vfs.foo.doclusterread and vfs.foo.doclusterwrite are deleted. Only mount option can control clustered I/O from userland. 2. When foofs_mount mounts block device, foofs_mount checks D_CLUSTERR and D_CLUSTERW bits of the d_flags member in the block device switch table. If D_NOCLUSTERR / D_NOCLUSTERW are set, MNT_NOCLUSTERR / MNT_NOCLUSTERW bits will be set. In this case, MNT_NOCLUSTERR and MNT_NOCLUSTERW cannot be cleared from userland. 3. Vnode driver disables both clustered read and write. 4. Union filesystem disables clutered write. Reviewed by: bde
* Fix all areas of the system (or at least all those in LINT) to avoid storingwollman1997-08-161-2/+2
| | | | | | | | socket addresses in mbufs. (Socket buffers are the one exception.) A number of kernel APIs needed to get fixed in order to make this happen. Also, fix three protocol families which kept PCBs in mbufs to not malloc them instead. Delete some old compatibility cruft while we're at it, and add some new routines in the in_cksum family.
* Removed unused #includes.bde1997-08-021-4/+1
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* 1. Added cast and parenthesis in block size calculaion inkato1997-05-071-2/+2
| | | | | | | union_statfs(). 2. staticized union vops. Submitted by: Doug Rabson <dfr@nlsystems.com>
* Avoid `lock against myself' panic by following operation:kato1997-04-191-2/+16
| | | | | | | | | | # mount -t union (or null) dir1 dir2 # mount -t union (or null) dir2 dir1 The function namei in union_mount calls union_root. The upper vnode has been already locked and vn_lock in union_root causes above panic. Add printf's included in `#ifdef DIAGNOSTIC' for EDEADLK cases.
* Fix `lockmgr: locking against myself' panic by multi union mount ofkato1997-04-141-1/+25
| | | | | | | | | | | | | same directory pair. If we do: mount -t union a b mount -t union a b then, (1) namei tries to lock fs which has been already locked by first union mount and (2) union_root() tries to lock locked fs. To avoid first deadlock condition, unlock vnode if lowerrootvp is union node, and to avoid second case, union_mount returns EDEADLK when multi union mount is detected.
* Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are notpeter1997-02-221-1/+1
| | | | ready for it yet.
* This is the kernel Lite/2 commit. There are some requisite userlanddyson1997-02-101-147/+91
| | | | | | | | | | | | | | | changes, so don't expect to be able to run the kernel as-is (very well) without the appropriate Lite/2 userland changes. The system boots and can mount UFS filesystems. Untested: ext2fs, msdosfs, NFS Known problems: Incorrect Berkeley ID strings in some files. Mount_std mounts will not work until the getfsent library routine is changed. Reviewed by: various people Submitted by: Jeffery Hsu <hsu@freebsd.org>
* Make the long-awaited change from $Id$ to $FreeBSD$jkh1997-01-141-1/+1
| | | | | | | | 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.
* Added prototypes.bde1995-12-031-5/+21
| | | | Removed some unnecessary #includes.
* Remove trailing whitespace.rgrimes1995-05-301-5/+5
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* Add four more filesystem flags:wollman1995-03-161-2/+2
| | | | | | | | | | VFCF_NETWORK (this FS goes over the net) VFCF_READONLY (read-write mounts do not make any sense) VFCF_SYNTHETIC (data in this FS is not real) VFCF_LOOPBACK (this FS aliases something else) cd9660 is readonly; nullfs, umapfs, and union are loopback; NFS is netowkr; procfs, kernfs, and fdesc are synthetic.
* Add and move declarations to fix all of the warnings from `gcc -Wimplicit'bde1995-03-161-2/+4
| | | | | | (except in netccitt, netiso and netns) and most of the warnings from `gcc -Wnested-externs'. Fix all the bugs found. There were no serious ones.
* From tim@cs.city.ac.uk (Tim Wilkinson):dg1994-11-041-1/+3
| | | | | | | | | | | | | Find enclosed a short bugfix to get the union filesystem up and running in FreeBSD-current. We don't think we've got all the problems yet but these fixes sort out the major ones (which mostly concert bad locking of vnodes), no doubt we'll post others as necessary. Known problems include the inability of the umount command (not the system call) to unmount unions in certain circumstances (this is due the way "realpath" works), and the failure of direntries to always get all available files in unioned subdirectories. We are, as they say, working on it. Submitted by: tim@cs.city.ac.uk (Tim Wilkinson)
* Cosmetics. reduce the noise from gcc -Wall.phk1994-10-101-5/+9
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