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freebsd-dev/sys/ufs/ffs/ffs_extern.h

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BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/*-
* Copyright (c) 1991, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
This is the kernel Lite/2 commit. There are some requisite userland 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>
1997-02-10 02:22:35 +00:00
* @(#)ffs_extern.h 8.6 (Berkeley) 3/30/95
$Id$ -> $FreeBSD$
1999-08-28 01:08:13 +00:00
* $FreeBSD$
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
*/
Removed bogus _BEGIN_DECLS/_END_DECLS. Removed unused struct tag declarations in cloned code. Added or cleaned up idempotency ifdefs.
1996-05-01 02:16:17 +00:00
#ifndef _UFS_FFS_EXTERN_H
#define _UFS_FFS_EXTERN_H
This is the kernel Lite/2 commit. There are some requisite userland 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>
1997-02-10 02:22:35 +00:00
/*
* Sysctl values for the fast filesystem.
*/
#define FFS_REALLOCBLKS 3 /* block reallocation enabled */
#define FFS_ASYNCFREE 4 /* asynchronous block freeing enabled */
#define FFS_MAXID 5 /* number of valid ffs ids */
#define FFS_NAMES { \
{ 0, 0 }, \
Clustered read and write are switched at mount-option level. 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
1997-09-27 13:40:20 +00:00
{ 0, 0 }, \
{ 0, 0 }, \
This is the kernel Lite/2 commit. There are some requisite userland 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>
1997-02-10 02:22:35 +00:00
{ "doreallocblks", CTLTYPE_INT }, \
{ "doasyncfree", CTLTYPE_INT }, \
}
struct buf;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
struct fid;
struct fs;
struct inode;
Forward declare some structs so that this file is more self-sufficient.
1998-02-03 21:52:02 +00:00
struct malloc_type;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
struct mount;
Forward declare some structs so that this file is more self-sufficient.
1998-02-03 21:52:02 +00:00
struct proc;
Fix all areas of the system (or at least all those in LINT) to avoid storing 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.
1997-08-16 19:16:27 +00:00
struct sockaddr;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
struct statfs;
Forward declare some structs so that this file is more self-sufficient.
1998-02-03 21:52:02 +00:00
struct ucred;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
struct vnode;
Forward declare even more structs to restore some self-sufficiency. Didn't fix new dependence on <ufs/ufs/inode.h> and its prerequisites.
1998-03-23 14:12:37 +00:00
struct vop_balloc_args;
Forward declare some structs so that this file is more self-sufficient.
1998-02-03 21:52:02 +00:00
struct vop_bmap_args;
Forward declare even more structs to restore some self-sufficiency. Didn't fix new dependence on <ufs/ufs/inode.h> and its prerequisites.
1998-03-23 14:12:37 +00:00
struct vop_fsync_args;
Forward declare some structs so that this file is more self-sufficient.
1998-02-03 21:52:02 +00:00
struct vop_reallocblks_args;
Add snapshots to the fast filesystem. Most of the changes support the gating of system calls that cause modifications to the underlying filesystem. The gating can be enabled by any filesystem that needs to consistently suspend operations by adding the vop_stdgetwritemount to their set of vnops. Once gating is enabled, the function vfs_write_suspend stops all new write operations to a filesystem, allows any filesystem modifying system calls already in progress to complete, then sync's the filesystem to disk and returns. The function vfs_write_resume allows the suspended write operations to begin again. Gating is not added by default for all filesystems as for SMP systems it adds two extra locks to such critical kernel paths as the write system call. Thus, gating should only be added as needed. Details on the use and current status of snapshots in FFS can be found in /sys/ufs/ffs/README.snapshot so for brevity and timelyness is not included here. Unless and until you create a snapshot file, these changes should have no effect on your system (famous last words).
2000-07-11 22:07:57 +00:00
struct vop_copyonwrite_args;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
int ffs_alloc __P((struct inode *,
This is the kernel Lite/2 commit. There are some requisite userland 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>
1997-02-10 02:22:35 +00:00
ufs_daddr_t, ufs_daddr_t, int, struct ucred *, ufs_daddr_t *));
Reviewed by: dyson@freebsd.org (john Dyson), dg@root.com (david greenman) Submitted by: Kirk McKusick (mcKusick@mckusick.com) Obtained from: WHistle development tree
1998-03-08 09:59:44 +00:00
int ffs_balloc __P((struct vop_balloc_args *));
VFS mega cleanup commit (x/N) 1. Add new file "sys/kern/vfs_default.c" where default actions for VOPs go. Implement proper defaults for ABORTOP, BWRITE, LEASE, POLL, REVOKE and STRATEGY. Various stuff spread over the entire tree belongs here. 2. Change VOP_BLKATOFF to a normal function in cd9660. 3. Kill VOP_BLKATOFF, VOP_TRUNCATE, VOP_VFREE, VOP_VALLOC. These are private interface functions between UFS and the underlying storage manager layer (FFS/LFS/MFS/EXT2FS). The functions now live in struct ufsmount instead. 4. Remove a kludge of VOP_ functions in all filesystems, that did nothing but obscure the simplicity and break the expandability. If a filesystem doesn't implement VOP_FOO, it shouldn't have an entry for it in its vnops table. The system will try to DTRT if it is not implemented. There are still some cruft left, but the bulk of it is done. 5. Fix another VCALL in vfs_cache.c (thanks Bruce!)
1997-10-16 10:50:27 +00:00
int ffs_blkatoff __P((struct vnode *, off_t, char **, struct buf **));
This is the kernel Lite/2 commit. There are some requisite userland 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>
1997-02-10 02:22:35 +00:00
void ffs_blkfree __P((struct inode *, ufs_daddr_t, long));
ufs_daddr_t ffs_blkpref __P((struct inode *, ufs_daddr_t, int, ufs_daddr_t *));
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
int ffs_bmap __P((struct vop_bmap_args *));
This is the kernel Lite/2 commit. There are some requisite userland 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>
1997-02-10 02:22:35 +00:00
void ffs_clrblock __P((struct fs *, u_char *, ufs_daddr_t));
Seperate the export check in VFS_FHTOVP, exports are now checked via VFS_CHECKEXP. Add fh(open|stat|stafs) syscalls to allow userland to query filesystems based on (network) filehandle. Obtained from: NetBSD
1999-09-11 00:46:08 +00:00
int ffs_fhtovp __P((struct mount *, struct fid *, struct vnode **));
Add function prototypes for most of the new Lite2 functions. Also made a few of the miscfs routines static to be consistent. Some modules simply required some additional #includes to remove -Wall warnings.
1997-02-12 06:52:51 +00:00
int ffs_flushfiles __P((struct mount *, int, struct proc *));
This is the kernel Lite/2 commit. There are some requisite userland 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>
1997-02-10 02:22:35 +00:00
void ffs_fragacct __P((struct fs *, int, int32_t [], int));
Reviewed by: dyson@freebsd.org (john Dyson), dg@root.com (david greenman) Submitted by: Kirk McKusick (mcKusick@mckusick.com) Obtained from: WHistle development tree
1998-03-08 09:59:44 +00:00
int ffs_freefile __P(( struct vnode *, ino_t, int ));
This is the kernel Lite/2 commit. There are some requisite userland 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>
1997-02-10 02:22:35 +00:00
int ffs_isblock __P((struct fs *, u_char *, ufs_daddr_t));
Reviewed by: dyson@freebsd.org (john Dyson), dg@root.com (david greenman) Submitted by: Kirk McKusick (mcKusick@mckusick.com) Obtained from: WHistle development tree
1998-03-08 09:59:44 +00:00
int ffs_isfreeblock __P((struct fs *, unsigned char *, ufs_daddr_t));
Add type arg to ffs_mountfs and avoid examining v_tag to find out if MFS is getting a free ride. Use generic ufs_reclaim().
1997-10-10 18:17:00 +00:00
int ffs_mountfs __P((struct vnode *, struct mount *, struct proc *,
struct malloc_type *));
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
int ffs_mountroot __P((void));
Initial commit of IFS - a inode-namespaced FFS. Here is a short description: How it works: -- Basically ifs is a copy of ffs, overriding some vfs/vnops. (Yes, hack.) I didn't see the need in duplicating all of sys/ufs/ffs to get this off the ground. File creation is done through a special file - 'newfile' . When newfile is called, the system allocates and returns an inode. Note that newfile is done in a cloning fashion: fd = open("newfile", O_CREAT|O_RDWR, 0644); fstat(fd, &st); printf("new file is %d\n", (int)st.st_ino); Once you have created a file, you can open() and unlink() it by its returned inode number retrieved from the stat call, ie: fd = open("5", O_RDWR); The creation permissions depend entirely if you have write access to the root directory of the filesystem. To get the list of currently allocated inodes, VOP_READDIR has been added which returns a directory listing of those currently allocated. -- What this entails: * patching conf/files and conf/options to include IFS as a new compile option (and since ifs depends upon FFS, include the FFS routines) * An entry in i386/conf/NOTES indicating IFS exists and where to go for an explanation * Unstaticize a couple of routines in src/sys/ufs/ffs/ which the IFS routines require (ffs_mount() and ffs_reload()) * a new bunch of routines in src/sys/ufs/ifs/ which implement the IFS routines. IFS replaces some of the vfsops, and a handful of vnops - most notably are VFS_VGET(), VOP_LOOKUP(), VOP_UNLINK() and VOP_READDIR(). Any other directory operation is marked as invalid. What this results in: * an IFS partition's create permissions are controlled by the perm/ownership of the root mount point, just like a normal directory * Each inode has perm and ownership too * IFS does *NOT* mean an FFS partition can be opened per inode. This is a completely seperate filesystem here * Softupdates doesn't work with IFS, and really I don't think it needs it. Besides, fsck's are FAST. (Try it :-) * Inodes 0 and 1 aren't allocatable because they are special (dump/swap IIRC). Inode 2 isn't allocatable since UFS/FFS locks all inodes in the system against this particular inode, and unravelling THAT code isn't trivial. Therefore, useful inodes start at 3. Enjoy, and feedback is definitely appreciated!
2000-10-14 03:02:30 +00:00
int ffs_mount __P((struct mount *, char *, caddr_t, struct nameidata *,
struct proc *));
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
int ffs_reallocblks __P((struct vop_reallocblks_args *));
int ffs_realloccg __P((struct inode *,
This is the kernel Lite/2 commit. There are some requisite userland 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>
1997-02-10 02:22:35 +00:00
ufs_daddr_t, ufs_daddr_t, int, int, struct ucred *, struct buf **));
void ffs_setblock __P((struct fs *, u_char *, ufs_daddr_t));
Add snapshots to the fast filesystem. Most of the changes support the gating of system calls that cause modifications to the underlying filesystem. The gating can be enabled by any filesystem that needs to consistently suspend operations by adding the vop_stdgetwritemount to their set of vnops. Once gating is enabled, the function vfs_write_suspend stops all new write operations to a filesystem, allows any filesystem modifying system calls already in progress to complete, then sync's the filesystem to disk and returns. The function vfs_write_resume allows the suspended write operations to begin again. Gating is not added by default for all filesystems as for SMP systems it adds two extra locks to such critical kernel paths as the write system call. Thus, gating should only be added as needed. Details on the use and current status of snapshots in FFS can be found in /sys/ufs/ffs/README.snapshot so for brevity and timelyness is not included here. Unless and until you create a snapshot file, these changes should have no effect on your system (famous last words).
2000-07-11 22:07:57 +00:00
int ffs_snapblkfree __P((struct inode *freeip, ufs_daddr_t bno, long size));
Several small but important fixes for snapshots: 1) Be more tolerant of missing snapshot files by only trying to decrement their reference count if they are registered as active. 2) Fix for snapshots of filesystems with block sizes larger than 8K (from Ollivier Robert <roberto@eurocontrol.fr>). 3) Fix to avoid losing last block in snapshot file when calculating blocks that need to be copied (from Don Coleman <coleman@coleman.org>).
2000-12-19 04:41:09 +00:00
void ffs_snapremove __P((struct vnode *vp));
Add snapshots to the fast filesystem. Most of the changes support the gating of system calls that cause modifications to the underlying filesystem. The gating can be enabled by any filesystem that needs to consistently suspend operations by adding the vop_stdgetwritemount to their set of vnops. Once gating is enabled, the function vfs_write_suspend stops all new write operations to a filesystem, allows any filesystem modifying system calls already in progress to complete, then sync's the filesystem to disk and returns. The function vfs_write_resume allows the suspended write operations to begin again. Gating is not added by default for all filesystems as for SMP systems it adds two extra locks to such critical kernel paths as the write system call. Thus, gating should only be added as needed. Details on the use and current status of snapshots in FFS can be found in /sys/ufs/ffs/README.snapshot so for brevity and timelyness is not included here. Unless and until you create a snapshot file, these changes should have no effect on your system (famous last words).
2000-07-11 22:07:57 +00:00
int ffs_snapshot __P((struct mount *mp, char *snapfile));
void ffs_snapshot_mount __P((struct mount *mp));
void ffs_snapshot_unmount __P((struct mount *mp));
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
int ffs_statfs __P((struct mount *, struct statfs *, struct proc *));
int ffs_sync __P((struct mount *, int, struct ucred *, struct proc *));
VFS mega cleanup commit (x/N) 1. Add new file "sys/kern/vfs_default.c" where default actions for VOPs go. Implement proper defaults for ABORTOP, BWRITE, LEASE, POLL, REVOKE and STRATEGY. Various stuff spread over the entire tree belongs here. 2. Change VOP_BLKATOFF to a normal function in cd9660. 3. Kill VOP_BLKATOFF, VOP_TRUNCATE, VOP_VFREE, VOP_VALLOC. These are private interface functions between UFS and the underlying storage manager layer (FFS/LFS/MFS/EXT2FS). The functions now live in struct ufsmount instead. 4. Remove a kludge of VOP_ functions in all filesystems, that did nothing but obscure the simplicity and break the expandability. If a filesystem doesn't implement VOP_FOO, it shouldn't have an entry for it in its vnops table. The system will try to DTRT if it is not implemented. There are still some cruft left, but the bulk of it is done. 5. Fix another VCALL in vfs_cache.c (thanks Bruce!)
1997-10-16 10:50:27 +00:00
int ffs_truncate __P((struct vnode *, off_t, int, struct ucred *, struct proc *));
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
int ffs_unmount __P((struct mount *, int, struct proc *));
Don't pass unused unused timestamp args to UFS_UPDATE() or waste time initializing them. This almost finishes centralizing (in-core) timestamp updates in ufs_itimes().
1999-01-07 16:14:19 +00:00
int ffs_update __P((struct vnode *, int));
VFS mega cleanup commit (x/N) 1. Add new file "sys/kern/vfs_default.c" where default actions for VOPs go. Implement proper defaults for ABORTOP, BWRITE, LEASE, POLL, REVOKE and STRATEGY. Various stuff spread over the entire tree belongs here. 2. Change VOP_BLKATOFF to a normal function in cd9660. 3. Kill VOP_BLKATOFF, VOP_TRUNCATE, VOP_VFREE, VOP_VALLOC. These are private interface functions between UFS and the underlying storage manager layer (FFS/LFS/MFS/EXT2FS). The functions now live in struct ufsmount instead. 4. Remove a kludge of VOP_ functions in all filesystems, that did nothing but obscure the simplicity and break the expandability. If a filesystem doesn't implement VOP_FOO, it shouldn't have an entry for it in its vnops table. The system will try to DTRT if it is not implemented. There are still some cruft left, but the bulk of it is done. 5. Fix another VCALL in vfs_cache.c (thanks Bruce!)
1997-10-16 10:50:27 +00:00
int ffs_valloc __P((struct vnode *, int, struct ucred *, struct vnode **));
int ffs_vfree __P((struct vnode *, ino_t, int));
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
int ffs_vget __P((struct mount *, ino_t, struct vnode **));
int ffs_vptofh __P((struct vnode *, struct fid *));
Introduced a type `vop_t' for vnode operation functions and used it 1138 times (:-() in casts and a few more times in declarations. This change is null for the i386. The type has to be `typedef int vop_t(void *)' and not `typedef int vop_t()' because `gcc -Wstrict-prototypes' warns about the latter. Since vnode op functions are called with args of different (struct pointer) types, neither of these function types is any use for type checking of the arg, so it would be preferable not to use the complete function type, especially since using the complete type requires adding 1138 casts to avoid compiler warnings and another 40+ casts to reverse the function pointer conversions before calling the functions.
1995-11-09 08:17:23 +00:00
extern vop_t **ffs_vnodeop_p;
extern vop_t **ffs_specop_p;
extern vop_t **ffs_fifoop_p;
Removed bogus _BEGIN_DECLS/_END_DECLS. Removed unused struct tag declarations in cloned code. Added or cleaned up idempotency ifdefs.
1996-05-01 02:16:17 +00:00
Reviewed by: dyson@freebsd.org (john Dyson), dg@root.com (david greenman) Submitted by: Kirk McKusick (mcKusick@mckusick.com) Obtained from: WHistle development tree
1998-03-08 09:59:44 +00:00
/*
* Soft update function prototypes.
*/
void softdep_initialize __P((void));
int softdep_mount __P((struct vnode *, struct mount *, struct fs *,
struct ucred *));
This patch corrects the first round of panics and hangs reported with the new snapshot code. Update addaliasu to correctly implement the semantics of the old checkalias function. When a device vnode first comes into existence, check to see if an anonymous vnode for the same device was created at boot time by bdevvp(). If so, adopt the bdevvp vnode rather than creating a new vnode for the device. This corrects a problem which caused the kernel to panic when taking a snapshot of the root filesystem. Change the calling convention of vn_write_suspend_wait() to be the same as vn_start_write(). Split out softdep_flushworklist() from softdep_flushfiles() so that it can be used to clear the work queue when suspending filesystem operations. Access to buffers becomes recursive so that snapshots can recursively traverse their indirect blocks using ffs_copyonwrite() when checking for the need for copy on write when flushing one of their own indirect blocks. This eliminates a deadlock between the syncer daemon and a process taking a snapshot. Ensure that softdep_process_worklist() can never block because of a snapshot being taken. This eliminates a problem with buffer starvation. Cleanup change in ffs_sync() which did not synchronously wait when MNT_WAIT was specified. The result was an unclean filesystem panic when doing forcible unmount with heavy filesystem I/O in progress. Return a zero'ed block when reading a block that was not in use at the time that a snapshot was taken. Normally, these blocks should never be read. However, the readahead code will occationally read them which can cause unexpected behavior. Clean up the debugging code that ensures that no blocks be written on a filesystem while it is suspended. Snapshots must explicitly label the blocks that they are writing during the suspension so that they do not cause a `write on suspended filesystem' panic. Reorganize ffs_copyonwrite() to eliminate a deadlock and also to prevent a race condition that would permit the same block to be copied twice. This change eliminates an unexpected soft updates inconsistency in fsck caused by the double allocation. Use bqrelse rather than brelse for buffers that will be needed soon again by the snapshot code. This improves snapshot performance.
2000-07-24 05:28:33 +00:00
int softdep_flushworklist __P((struct mount *, int *, struct proc *));
Reviewed by: dyson@freebsd.org (john Dyson), dg@root.com (david greenman) Submitted by: Kirk McKusick (mcKusick@mckusick.com) Obtained from: WHistle development tree
1998-03-08 09:59:44 +00:00
int softdep_flushfiles __P((struct mount *, int, struct proc *));
void softdep_update_inodeblock __P((struct inode *, struct buf *, int));
void softdep_load_inodeblock __P((struct inode *));
void softdep_freefile __P((struct vnode *, ino_t, int));
void softdep_setup_freeblocks __P((struct inode *, off_t));
void softdep_setup_inomapdep __P((struct buf *, struct inode *, ino_t));
void softdep_setup_blkmapdep __P((struct buf *, struct fs *, ufs_daddr_t));
void softdep_setup_allocdirect __P((struct inode *, ufs_lbn_t, ufs_daddr_t,
ufs_daddr_t, long, long, struct buf *));
void softdep_setup_allocindir_meta __P((struct buf *, struct inode *,
struct buf *, int, ufs_daddr_t));
void softdep_setup_allocindir_page __P((struct inode *, ufs_lbn_t,
struct buf *, int, ufs_daddr_t, ufs_daddr_t, struct buf *));
Add a hook to ffs_fsync to allow soft updates to get first chance at doing a sync on the block device for the filesystem. That allows it to push the bitmap blocks before the inode blocks which greatly reduces the number of inode rollbacks that need to be done.
1999-05-14 01:26:46 +00:00
void softdep_fsync_mountdev __P((struct vnode *));
Reviewed by: dyson@freebsd.org (john Dyson), dg@root.com (david greenman) Submitted by: Kirk McKusick (mcKusick@mckusick.com) Obtained from: WHistle development tree
1998-03-08 09:59:44 +00:00
int softdep_sync_metadata __P((struct vop_fsync_args *));
Clean up warning about undeclared function by declaring softdep_fsync in mount.h instead of ffs_extern.h. The correct solution is to use an indirect function pointer so that the kernel does not have to be built with options FFS, but that will be left for another day.
2000-07-11 19:28:26 +00:00
/* XXX incorrectly moved to mount.h - should be indirect function */
#if 0
ARGH! I have too many source trees :-( Fix prototype errors in last commit.
2000-06-16 13:00:33 +00:00
int softdep_fsync __P((struct vnode *vp));
Clean up warning about undeclared function by declaring softdep_fsync in mount.h instead of ffs_extern.h. The correct solution is to use an indirect function pointer so that the kernel does not have to be built with options FFS, but that will be left for another day.
2000-07-11 19:28:26 +00:00
#endif
Reviewed by: dyson@freebsd.org (john Dyson), dg@root.com (david greenman) Submitted by: Kirk McKusick (mcKusick@mckusick.com) Obtained from: WHistle development tree
1998-03-08 09:59:44 +00:00
Removed bogus _BEGIN_DECLS/_END_DECLS. Removed unused struct tag declarations in cloned code. Added or cleaned up idempotency ifdefs.
1996-05-01 02:16:17 +00:00
#endif /* !_UFS_FFS_EXTERN_H */
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