the UFS_EXTATTR option was supposed to affect only UFS1 file systems,
but when the UFS2 extattr code was merged, the UFS_EXTATTR option was
mistakenly changed to affect UFS2 file systems as well. this commit
changes UFS_EXTATTR back to affecting only UFS1 file systems as originally
intended. in UFS2 (or rather UFS2ea in NetBSD), extattrs are a
native feature and are always supported.

lfs: Include lfs_debug.c only if DEBUG is enabled.

Add ACL support for FFS. From FreeBSD.

Extended attribute support for ffsv2, from FreeBSD.

remove noncompilable WAPBL_DEBUG_INODES

PR kern/49554 by Thomas Klausner

branches: 1.45.8;
Don't include any of the ufs code if all the dependent filesystems are missing.

Include the fs scaffolding when none of the ffs/mfs/ext2fs/chfs is included
so a MODULAR kernel links.

branches: 1.43.16;
add support for extended attributes in ext2fs for ext3/ext4; read-only for now

GSoC 2016 (Hrishikesh Goyal): Htree index support from FreeBSD

add extents.

Change lfs from hash table to vcache.

- Change lfs_valloc() to return an inode number and version instead of
a vnode and move lfs_ialloc() and lfs_vcreate() to new lfs_init_vnode().

- Add lfs_valloc_fixed() to allocate a known inode, used by kernel
roll forward.

- Remove lfs_*ref(), these functions cannot coexist with vcache and
their commented behaviour is far away from their implementation.

- Add the cleaner lwp and blockinfo to struct ulfsmount so lfs_loadvnode()
may use hints from the cleaner.

- Remove vnode locks from ulfs_lookup() like we did with ufs_lookup().

Change chfs from hashlist to vcache.

branches: 1.38.2;
Remove unused extended attributes kernel options

As Masao Uebayashi pointed to me, UFS_EXTATTR_AUTOSTART, LFS_EXTATTR_AUTOSTART
and UFS_EXTATTR_AUTOCREATE are not used anywhere in the code. Remove them
as they have been obsolete for a long time:
UFS_EXTATTR_AUTOSTART was replaced by mount -o extattr
LFS_EXTATTR_AUTOSTART was created to match obsolete UFS_EXTATTR_AUTOSTART
UFS_EXTATTR_AUTOCREATE was replaced by sysctl vfs.ffs.extattr_autocreate

To make sure that I'm not doing wrong, try to define ffs/ufs/vfs dependencies
a little more strictly.

branches: 1.36.2;
Move lfs_getpages and lfs_putpages to their own file.

Add a global vnode cache:

- vcache_get() retrieves a referenced and initialised vnode / fs node pair.
- vcache_remove() removes a vnode / fs node pair from the cache.

On cache miss vcache_get() calls new vfs operation vfs_loadvnode() to
initialise a vnode / fs node pair. This call is guaranteed exclusive,
no other thread will try to load this vnode / fs node pair.

Convert ufs/ext2fs, ufs/ffs and ufs/mfs to use this interface.

Remove now unused ufs/ufs_ihash

Discussed on tech-kern.

Welcome to 6.99.41

branches: 1.34.2;
Merge riastradh-drm2 to HEAD.

Collect the pieces of lfs rename into lfs_rename.c, and sprinkle static.

branches: 1.32.2; 1.32.4;
G/C

Apparently we also need to cut and paste ffs_snapgone() in order to be
able to link the ufs code.

Instead of actually cutting and pasting it (as it depends on ffs-only
things) implement it as panic. Probably we'll be able to demonstrate
later that it's unreachable.

XXX: Someone should add snapgone to struct ufs_ops in ufs/ufsmount.h,
XXX: and fix ufs/ufs_lookup.c to not hardwire ffs.

Split lfs from ufs step 3: rearrange config stuff.
Add new options:
LFS_EI
LFS_DIRHASH
LFS_EXTATTR
LFS_EXTATTR_AUTOSTART
LFS_QUOTA
LFS_QUOTA2

and update code referring to the corresponding FFS and UFS config
symbols to use the LFS versions. Disable the one extant reference
to APPLE_UFS in the ulfs files. Use opt_lfs.h only, not opt_ffs.h.

branches: 1.29.2;
Adapt ffs, lfs, and ext2fs to use genfs_rename.

ok dholland, rmind

chfs/debug.c deleted from files.ufs

branches: 1.27.2;
Import CHFS, which was formerly known as ChewieFS.

CHFS is a file system for flash devices developed by the
Software Engineering Department at University of Szeged, Hungary.

http://chewiefs.sed.hu/

Thanks for all who made it possible.

branches: 1.26.4;
Add a new libquota library, which contains some blocks to build and/or
parse quota plists; as well as a getfsquota() function to retrieve quotas
for a single id from a single filesystem (whatever filesystem this is:
a local quota-enabled fs or NFS). This is build on functions getufsquota()
(for local filesystems with UFS-like quotas) and getnfsquota();
which are also available to userland programs.
move functions from quota2_subr.c to libquota or libprop as appropriate,
and ajust in-tree quota tools.
move some declarations from kernel headers to either sys/quota.h or
quota/quota.h as appropriate. ufs/ufs/quota.h still installed because
it's needed by other installed ufs headers.
ufs/ufs/quota1.h still installed as a quick&dirty way to get a code
using the old quotactl() to compile (just include ufs/ufs/quota1.h instead of
ufs/ufs/quota.h - old code won't compile without this change and this is
on purpose).
Discussed on tech-kern@ and tech-net@ (long thread, but not much about
libquota itself ...)

merge the bouyer-quota2 branch. This adds a new on-disk format
to store disk quota usage and limits, integrated with ffs
metadata. Usage is checked by fsck_ffs (no more quotacheck)
and is covered by the WAPBL journal. Enabled with kernel
option QUOTA2 (added where QUOTA was enabled in kernel config files),
turned on with tunefs(8) on a per-filesystem
basis. mount_mfs(8) can also turn quotas on.

See http://mail-index.netbsd.org/tech-kern/2011/02/19/msg010025.html
for details.

branches: 1.24.2; 1.24.4; 1.24.6;
fs_lfs.h is no longer necessary

Remove fs_mfs.h from users because it is now unnecessary and don't
generate fs_mfs.h anymore.

Make mfs_initminiroot() mandatory. Allows to remove #ifdef MFS.

Don't generate unused fs_thefs.h headers.

Remove last #ifdef FFS. Do this by making lfs include ffs.
Could use UFS_OPS, but:

1) the lfs kernel module depends on full ffs already anway
2) lfs is being split from ufs, so this will automatically
go away soon
3) chances of anyone wanting an lfs-only kernel are pretty slim
4) i'm too lazy to figure out how to test ffs_snapgone() is
still called properly if I change the call ;)

branches: 1.19.2;
PR kern/26878 FFSv2 + softdep = livelock (no free ram)
PR kern/16942 panic with softdep and quotas
PR kern/19565 panic: softdep_write_inodeblock: indirect pointer #1 mismatch
PR kern/26274 softdep panic: allocdirect_merge: ...
PR kern/26374 Long delay before non-root users can write to softdep partitions
PR kern/28621 1.6.x "vp != NULL" panic in ffs_softdep.c:4653 while unmounting a softdep (+quota) filesystem
PR kern/29513 FFS+Softdep panic with unfsck-able file-corruption
PR kern/31544 The ffs softdep code appears to fail to write dirty bits to disk
PR kern/31981 stopping scsi disk can cause panic (softdep)
PR kern/32116 kernel panic in softdep (assertion failure)
PR kern/32532 softdep_trackbufs deadlock
PR kern/37191 softdep: locking against myself
PR kern/40474 Kernel panic after remounting raid root with softdep

Retire softdep, pass 2. As discussed and later formally announced on the
mailing lists.

branches: 1.18.2; 1.18.8;
Merge the simonb-wapbl branch. From the original branch commit:

Add Wasabi System's WAPBL (Write Ahead Physical Block Logging)
journaling code. Originally written by Darrin B. Jewell while
at Wasabi and updated to -current by Antti Kantee, Andy Doran,
Greg Oster and Simon Burge.

OK'd by core@, releng@.

branches: 1.17.6; 1.17.10; 1.17.12; 1.17.14; 1.17.16;
defflag LFS_KERNEL_RFW (in opt_lfs.h).
Note: lfs_rfw.c doesn't compile if you define the option; locking API fallout?

branches: 1.16.24; 1.16.34; 1.16.36; 1.16.38;
Let ext2fs be built even when none of ffs, lfs and mfs are present.

branches: 1.15.4; 1.15.6;
Separate the (non-working) LFS kernel roll-forward code into its own file,
lfs_rfw.c.

Tell config to generate fs_ffs.h as vfs_bio.c checks for defined(FFS).
Include that header in vfs_bio.c so that bioops are not redefined.

branches: 1.13.4; 1.13.6; 1.13.8; 1.13.10; 1.13.12;
merge ktrace-lwp.

split out lfs_itimes(). It is used in fsck_lfs.

Experimental support for extended attributes on UFS1 file systems, using a
backing file per attribute type indexed by inode number to hold the extended
attributes.

This is working pretty well on my test systems, except for the "autostart"
feature. I need someone with a better handle on the VFS locking protocol
to go over that.

This is a work-in-progress. There are parts of this that could be re-factored
allowing this approach to be used on other types of file systems.

Adapted from FreeBSD.

Defflag UFS_DIRHASH.

branches: 1.9.4;
nuke trailing whitespace

Make `options FFS_NO_SNAPSHOT' only disable snapshot creation
while not trashing existing snapshots.

Approved by: core@

change ffs_snapshot to !ffs_no_snapshot

Make ffs snapshots be enabled by 'option FFS_SNAPSHOT'

Add file system snapshots to kernel configs.

- Ffs internal snapshots get compiled in unconditionally.

- File system snapshot device fss(4) added to all kernel configs that
have a disk. Device is commented out on all non-GENERIC kernels.

Reviewed by: Jason Thorpe <thorpej@netbsd.org>

branches: 1.4.2;
Bring in Ian Dowse's Dirhash from FreeBSD. Hash tables of
directories are created on the fly and used to increase
performance by circumventing ufs_lookup's linear search.

Dirhash is enabled by the UFS_DIRHASH option, but not
by default.

branches: 1.3.4;
Add ffs internal snapshots. Written by Marshall Kirk McKusick for FreeBSD.

- Not enabled by default. Needs kernel option FFS_SNAPSHOT.
- Change parameters of ffs_blkfree.
- Let the copy-on-write functions return an error so spec_strategy
may fail if the copy-on-write fails.
- Change genfs_*lock*() to use vp->v_vnlock instead of &vp->v_lock.
- Add flag B_METAONLY to VOP_BALLOC to return indirect block buffer.
- Add a function ffs_checkfreefile needed for snapshot creation.
- Add special handling of snapshot files:
Snapshots may not be opened for writing and the attributes are read-only.
Use the mtime as the time this snapshot was taken.
Deny mtime updates for snapshot files.
- Add function transferlockers to transfer any waiting processes from
one lock to another.
- Add vfsop VFS_SNAPSHOT to take a snapshot and make it accessible through
a vnode.
- Add snapshot support to ls, fsck_ffs and dump.

Welcome to 2.0F.

Approved by: Jason R. Thorpe <thorpej@netbsd.org>

branches: 1.2.6;
Add support for the Apple UFS variation on ffs
This is the bulk of PR #17345

The general approach is to use a run time deteriminable value
for DIRBLKSIZ. Additional allowances are included for using
MAXSYMLINKLEN with FS_42INODEFMT and a shift in the cylinder group
cluster summary count array. Support is added for managing
the Apple UFS volume label.

branches: 1.1.6; 1.1.8;
Cleanup how file system configuration information is declared, grouping
related information together, with the file system code itself.

This is just low-hanging fruit -- more to come.

lfs: Include lfs_debug.c only if DEBUG is enabled.

Add ACL support for FFS. From FreeBSD.

Extended attribute support for ffsv2, from FreeBSD.

remove noncompilable WAPBL_DEBUG_INODES

PR kern/49554 by Thomas Klausner

branches: 1.45.8;
Don't include any of the ufs code if all the dependent filesystems are missing.

Include the fs scaffolding when none of the ffs/mfs/ext2fs/chfs is included
so a MODULAR kernel links.

branches: 1.43.16;
add support for extended attributes in ext2fs for ext3/ext4; read-only for now

GSoC 2016 (Hrishikesh Goyal): Htree index support from FreeBSD

add extents.

Change lfs from hash table to vcache.

- Change lfs_valloc() to return an inode number and version instead of
a vnode and move lfs_ialloc() and lfs_vcreate() to new lfs_init_vnode().

- Add lfs_valloc_fixed() to allocate a known inode, used by kernel
roll forward.

- Remove lfs_*ref(), these functions cannot coexist with vcache and
their commented behaviour is far away from their implementation.

- Add the cleaner lwp and blockinfo to struct ulfsmount so lfs_loadvnode()
may use hints from the cleaner.

- Remove vnode locks from ulfs_lookup() like we did with ufs_lookup().

Change chfs from hashlist to vcache.

branches: 1.38.2;
Remove unused extended attributes kernel options

As Masao Uebayashi pointed to me, UFS_EXTATTR_AUTOSTART, LFS_EXTATTR_AUTOSTART
and UFS_EXTATTR_AUTOCREATE are not used anywhere in the code. Remove them
as they have been obsolete for a long time:
UFS_EXTATTR_AUTOSTART was replaced by mount -o extattr
LFS_EXTATTR_AUTOSTART was created to match obsolete UFS_EXTATTR_AUTOSTART
UFS_EXTATTR_AUTOCREATE was replaced by sysctl vfs.ffs.extattr_autocreate

To make sure that I'm not doing wrong, try to define ffs/ufs/vfs dependencies
a little more strictly.

branches: 1.36.2;
Move lfs_getpages and lfs_putpages to their own file.

Add a global vnode cache:

- vcache_get() retrieves a referenced and initialised vnode / fs node pair.
- vcache_remove() removes a vnode / fs node pair from the cache.

On cache miss vcache_get() calls new vfs operation vfs_loadvnode() to
initialise a vnode / fs node pair. This call is guaranteed exclusive,
no other thread will try to load this vnode / fs node pair.

Convert ufs/ext2fs, ufs/ffs and ufs/mfs to use this interface.

Remove now unused ufs/ufs_ihash

Discussed on tech-kern.

Welcome to 6.99.41

branches: 1.34.2;
Merge riastradh-drm2 to HEAD.

Collect the pieces of lfs rename into lfs_rename.c, and sprinkle static.

branches: 1.32.2; 1.32.4;
G/C

Apparently we also need to cut and paste ffs_snapgone() in order to be
able to link the ufs code.

Instead of actually cutting and pasting it (as it depends on ffs-only
things) implement it as panic. Probably we'll be able to demonstrate
later that it's unreachable.

XXX: Someone should add snapgone to struct ufs_ops in ufs/ufsmount.h,
XXX: and fix ufs/ufs_lookup.c to not hardwire ffs.

Split lfs from ufs step 3: rearrange config stuff.
Add new options:
LFS_EI
LFS_DIRHASH
LFS_EXTATTR
LFS_EXTATTR_AUTOSTART
LFS_QUOTA
LFS_QUOTA2

and update code referring to the corresponding FFS and UFS config
symbols to use the LFS versions. Disable the one extant reference
to APPLE_UFS in the ulfs files. Use opt_lfs.h only, not opt_ffs.h.

branches: 1.29.2;
Adapt ffs, lfs, and ext2fs to use genfs_rename.

ok dholland, rmind

chfs/debug.c deleted from files.ufs

branches: 1.27.2;
Import CHFS, which was formerly known as ChewieFS.

CHFS is a file system for flash devices developed by the
Software Engineering Department at University of Szeged, Hungary.

http://chewiefs.sed.hu/

Thanks for all who made it possible.

branches: 1.26.4;
Add a new libquota library, which contains some blocks to build and/or
parse quota plists; as well as a getfsquota() function to retrieve quotas
for a single id from a single filesystem (whatever filesystem this is:
a local quota-enabled fs or NFS). This is build on functions getufsquota()
(for local filesystems with UFS-like quotas) and getnfsquota();
which are also available to userland programs.
move functions from quota2_subr.c to libquota or libprop as appropriate,
and ajust in-tree quota tools.
move some declarations from kernel headers to either sys/quota.h or
quota/quota.h as appropriate. ufs/ufs/quota.h still installed because
it's needed by other installed ufs headers.
ufs/ufs/quota1.h still installed as a quick&dirty way to get a code
using the old quotactl() to compile (just include ufs/ufs/quota1.h instead of
ufs/ufs/quota.h - old code won't compile without this change and this is
on purpose).
Discussed on tech-kern@ and tech-net@ (long thread, but not much about
libquota itself ...)

merge the bouyer-quota2 branch. This adds a new on-disk format
to store disk quota usage and limits, integrated with ffs
metadata. Usage is checked by fsck_ffs (no more quotacheck)
and is covered by the WAPBL journal. Enabled with kernel
option QUOTA2 (added where QUOTA was enabled in kernel config files),
turned on with tunefs(8) on a per-filesystem
basis. mount_mfs(8) can also turn quotas on.

See http://mail-index.netbsd.org/tech-kern/2011/02/19/msg010025.html
for details.

branches: 1.24.2; 1.24.4; 1.24.6;
fs_lfs.h is no longer necessary

Remove fs_mfs.h from users because it is now unnecessary and don't
generate fs_mfs.h anymore.

Make mfs_initminiroot() mandatory. Allows to remove #ifdef MFS.

Don't generate unused fs_thefs.h headers.

Remove last #ifdef FFS. Do this by making lfs include ffs.
Could use UFS_OPS, but:

1) the lfs kernel module depends on full ffs already anway
2) lfs is being split from ufs, so this will automatically
go away soon
3) chances of anyone wanting an lfs-only kernel are pretty slim
4) i'm too lazy to figure out how to test ffs_snapgone() is
still called properly if I change the call ;)

branches: 1.19.2;
PR kern/26878 FFSv2 + softdep = livelock (no free ram)
PR kern/16942 panic with softdep and quotas
PR kern/19565 panic: softdep_write_inodeblock: indirect pointer #1 mismatch
PR kern/26274 softdep panic: allocdirect_merge: ...
PR kern/26374 Long delay before non-root users can write to softdep partitions
PR kern/28621 1.6.x "vp != NULL" panic in ffs_softdep.c:4653 while unmounting a softdep (+quota) filesystem
PR kern/29513 FFS+Softdep panic with unfsck-able file-corruption
PR kern/31544 The ffs softdep code appears to fail to write dirty bits to disk
PR kern/31981 stopping scsi disk can cause panic (softdep)
PR kern/32116 kernel panic in softdep (assertion failure)
PR kern/32532 softdep_trackbufs deadlock
PR kern/37191 softdep: locking against myself
PR kern/40474 Kernel panic after remounting raid root with softdep

Retire softdep, pass 2. As discussed and later formally announced on the
mailing lists.

branches: 1.18.2; 1.18.8;
Merge the simonb-wapbl branch. From the original branch commit:

Add Wasabi System's WAPBL (Write Ahead Physical Block Logging)
journaling code. Originally written by Darrin B. Jewell while
at Wasabi and updated to -current by Antti Kantee, Andy Doran,
Greg Oster and Simon Burge.

OK'd by core@, releng@.

branches: 1.17.6; 1.17.10; 1.17.12; 1.17.14; 1.17.16;
defflag LFS_KERNEL_RFW (in opt_lfs.h).
Note: lfs_rfw.c doesn't compile if you define the option; locking API fallout?

branches: 1.16.24; 1.16.34; 1.16.36; 1.16.38;
Let ext2fs be built even when none of ffs, lfs and mfs are present.

branches: 1.15.4; 1.15.6;
Separate the (non-working) LFS kernel roll-forward code into its own file,
lfs_rfw.c.

Tell config to generate fs_ffs.h as vfs_bio.c checks for defined(FFS).
Include that header in vfs_bio.c so that bioops are not redefined.

branches: 1.13.4; 1.13.6; 1.13.8; 1.13.10; 1.13.12;
merge ktrace-lwp.

split out lfs_itimes(). It is used in fsck_lfs.

Experimental support for extended attributes on UFS1 file systems, using a
backing file per attribute type indexed by inode number to hold the extended
attributes.

This is working pretty well on my test systems, except for the "autostart"
feature. I need someone with a better handle on the VFS locking protocol
to go over that.

This is a work-in-progress. There are parts of this that could be re-factored
allowing this approach to be used on other types of file systems.

Adapted from FreeBSD.

Defflag UFS_DIRHASH.

branches: 1.9.4;
nuke trailing whitespace

Make `options FFS_NO_SNAPSHOT' only disable snapshot creation
while not trashing existing snapshots.

Approved by: core@

change ffs_snapshot to !ffs_no_snapshot

Make ffs snapshots be enabled by 'option FFS_SNAPSHOT'

Add file system snapshots to kernel configs.

- Ffs internal snapshots get compiled in unconditionally.

- File system snapshot device fss(4) added to all kernel configs that
have a disk. Device is commented out on all non-GENERIC kernels.

Reviewed by: Jason Thorpe <thorpej@netbsd.org>

branches: 1.4.2;
Bring in Ian Dowse's Dirhash from FreeBSD. Hash tables of
directories are created on the fly and used to increase
performance by circumventing ufs_lookup's linear search.

Dirhash is enabled by the UFS_DIRHASH option, but not
by default.

branches: 1.3.4;
Add ffs internal snapshots. Written by Marshall Kirk McKusick for FreeBSD.

- Not enabled by default. Needs kernel option FFS_SNAPSHOT.
- Change parameters of ffs_blkfree.
- Let the copy-on-write functions return an error so spec_strategy
may fail if the copy-on-write fails.
- Change genfs_*lock*() to use vp->v_vnlock instead of &vp->v_lock.
- Add flag B_METAONLY to VOP_BALLOC to return indirect block buffer.
- Add a function ffs_checkfreefile needed for snapshot creation.
- Add special handling of snapshot files:
Snapshots may not be opened for writing and the attributes are read-only.
Use the mtime as the time this snapshot was taken.
Deny mtime updates for snapshot files.
- Add function transferlockers to transfer any waiting processes from
one lock to another.
- Add vfsop VFS_SNAPSHOT to take a snapshot and make it accessible through
a vnode.
- Add snapshot support to ls, fsck_ffs and dump.

Welcome to 2.0F.

Approved by: Jason R. Thorpe <thorpej@netbsd.org>

branches: 1.2.6;
Add support for the Apple UFS variation on ffs
This is the bulk of PR #17345

The general approach is to use a run time deteriminable value
for DIRBLKSIZ. Additional allowances are included for using
MAXSYMLINKLEN with FS_42INODEFMT and a shift in the cylinder group
cluster summary count array. Support is added for managing
the Apple UFS volume label.

branches: 1.1.6; 1.1.8;
Cleanup how file system configuration information is declared, grouping
related information together, with the file system code itself.

This is just low-hanging fruit -- more to come.

Add ACL support for FFS. From FreeBSD.

Extended attribute support for ffsv2, from FreeBSD.

remove noncompilable WAPBL_DEBUG_INODES

PR kern/49554 by Thomas Klausner

branches: 1.45.8;
Don't include any of the ufs code if all the dependent filesystems are missing.

Include the fs scaffolding when none of the ffs/mfs/ext2fs/chfs is included
so a MODULAR kernel links.

branches: 1.43.16;
add support for extended attributes in ext2fs for ext3/ext4; read-only for now

GSoC 2016 (Hrishikesh Goyal): Htree index support from FreeBSD

add extents.

Change lfs from hash table to vcache.

- Change lfs_valloc() to return an inode number and version instead of
a vnode and move lfs_ialloc() and lfs_vcreate() to new lfs_init_vnode().

- Add lfs_valloc_fixed() to allocate a known inode, used by kernel
roll forward.

- Remove lfs_*ref(), these functions cannot coexist with vcache and
their commented behaviour is far away from their implementation.

- Add the cleaner lwp and blockinfo to struct ulfsmount so lfs_loadvnode()
may use hints from the cleaner.

- Remove vnode locks from ulfs_lookup() like we did with ufs_lookup().

Change chfs from hashlist to vcache.

branches: 1.38.2;
Remove unused extended attributes kernel options

As Masao Uebayashi pointed to me, UFS_EXTATTR_AUTOSTART, LFS_EXTATTR_AUTOSTART
and UFS_EXTATTR_AUTOCREATE are not used anywhere in the code. Remove them
as they have been obsolete for a long time:
UFS_EXTATTR_AUTOSTART was replaced by mount -o extattr
LFS_EXTATTR_AUTOSTART was created to match obsolete UFS_EXTATTR_AUTOSTART
UFS_EXTATTR_AUTOCREATE was replaced by sysctl vfs.ffs.extattr_autocreate

To make sure that I'm not doing wrong, try to define ffs/ufs/vfs dependencies
a little more strictly.

branches: 1.36.2;
Move lfs_getpages and lfs_putpages to their own file.

Add a global vnode cache:

- vcache_get() retrieves a referenced and initialised vnode / fs node pair.
- vcache_remove() removes a vnode / fs node pair from the cache.

On cache miss vcache_get() calls new vfs operation vfs_loadvnode() to
initialise a vnode / fs node pair. This call is guaranteed exclusive,
no other thread will try to load this vnode / fs node pair.

Convert ufs/ext2fs, ufs/ffs and ufs/mfs to use this interface.

Remove now unused ufs/ufs_ihash

Discussed on tech-kern.

Welcome to 6.99.41

branches: 1.34.2;
Merge riastradh-drm2 to HEAD.

Collect the pieces of lfs rename into lfs_rename.c, and sprinkle static.

branches: 1.32.2; 1.32.4;
G/C

Apparently we also need to cut and paste ffs_snapgone() in order to be
able to link the ufs code.

Instead of actually cutting and pasting it (as it depends on ffs-only
things) implement it as panic. Probably we'll be able to demonstrate
later that it's unreachable.

XXX: Someone should add snapgone to struct ufs_ops in ufs/ufsmount.h,
XXX: and fix ufs/ufs_lookup.c to not hardwire ffs.

Split lfs from ufs step 3: rearrange config stuff.
Add new options:
LFS_EI
LFS_DIRHASH
LFS_EXTATTR
LFS_EXTATTR_AUTOSTART
LFS_QUOTA
LFS_QUOTA2

and update code referring to the corresponding FFS and UFS config
symbols to use the LFS versions. Disable the one extant reference
to APPLE_UFS in the ulfs files. Use opt_lfs.h only, not opt_ffs.h.

branches: 1.29.2;
Adapt ffs, lfs, and ext2fs to use genfs_rename.

ok dholland, rmind

chfs/debug.c deleted from files.ufs

branches: 1.27.2;
Import CHFS, which was formerly known as ChewieFS.

CHFS is a file system for flash devices developed by the
Software Engineering Department at University of Szeged, Hungary.

http://chewiefs.sed.hu/

Thanks for all who made it possible.

branches: 1.26.4;
Add a new libquota library, which contains some blocks to build and/or
parse quota plists; as well as a getfsquota() function to retrieve quotas
for a single id from a single filesystem (whatever filesystem this is:
a local quota-enabled fs or NFS). This is build on functions getufsquota()
(for local filesystems with UFS-like quotas) and getnfsquota();
which are also available to userland programs.
move functions from quota2_subr.c to libquota or libprop as appropriate,
and ajust in-tree quota tools.
move some declarations from kernel headers to either sys/quota.h or
quota/quota.h as appropriate. ufs/ufs/quota.h still installed because
it's needed by other installed ufs headers.
ufs/ufs/quota1.h still installed as a quick&dirty way to get a code
using the old quotactl() to compile (just include ufs/ufs/quota1.h instead of
ufs/ufs/quota.h - old code won't compile without this change and this is
on purpose).
Discussed on tech-kern@ and tech-net@ (long thread, but not much about
libquota itself ...)

merge the bouyer-quota2 branch. This adds a new on-disk format
to store disk quota usage and limits, integrated with ffs
metadata. Usage is checked by fsck_ffs (no more quotacheck)
and is covered by the WAPBL journal. Enabled with kernel
option QUOTA2 (added where QUOTA was enabled in kernel config files),
turned on with tunefs(8) on a per-filesystem
basis. mount_mfs(8) can also turn quotas on.

See http://mail-index.netbsd.org/tech-kern/2011/02/19/msg010025.html
for details.

branches: 1.24.2; 1.24.4; 1.24.6;
fs_lfs.h is no longer necessary

Remove fs_mfs.h from users because it is now unnecessary and don't
generate fs_mfs.h anymore.

Make mfs_initminiroot() mandatory. Allows to remove #ifdef MFS.

Don't generate unused fs_thefs.h headers.

Remove last #ifdef FFS. Do this by making lfs include ffs.
Could use UFS_OPS, but:

1) the lfs kernel module depends on full ffs already anway
2) lfs is being split from ufs, so this will automatically
go away soon
3) chances of anyone wanting an lfs-only kernel are pretty slim
4) i'm too lazy to figure out how to test ffs_snapgone() is
still called properly if I change the call ;)

branches: 1.19.2;
PR kern/26878 FFSv2 + softdep = livelock (no free ram)
PR kern/16942 panic with softdep and quotas
PR kern/19565 panic: softdep_write_inodeblock: indirect pointer #1 mismatch
PR kern/26274 softdep panic: allocdirect_merge: ...
PR kern/26374 Long delay before non-root users can write to softdep partitions
PR kern/28621 1.6.x "vp != NULL" panic in ffs_softdep.c:4653 while unmounting a softdep (+quota) filesystem
PR kern/29513 FFS+Softdep panic with unfsck-able file-corruption
PR kern/31544 The ffs softdep code appears to fail to write dirty bits to disk
PR kern/31981 stopping scsi disk can cause panic (softdep)
PR kern/32116 kernel panic in softdep (assertion failure)
PR kern/32532 softdep_trackbufs deadlock
PR kern/37191 softdep: locking against myself
PR kern/40474 Kernel panic after remounting raid root with softdep

Retire softdep, pass 2. As discussed and later formally announced on the
mailing lists.

branches: 1.18.2; 1.18.8;
Merge the simonb-wapbl branch. From the original branch commit:

Add Wasabi System's WAPBL (Write Ahead Physical Block Logging)
journaling code. Originally written by Darrin B. Jewell while
at Wasabi and updated to -current by Antti Kantee, Andy Doran,
Greg Oster and Simon Burge.

OK'd by core@, releng@.

branches: 1.17.6; 1.17.10; 1.17.12; 1.17.14; 1.17.16;
defflag LFS_KERNEL_RFW (in opt_lfs.h).
Note: lfs_rfw.c doesn't compile if you define the option; locking API fallout?

branches: 1.16.24; 1.16.34; 1.16.36; 1.16.38;
Let ext2fs be built even when none of ffs, lfs and mfs are present.

branches: 1.15.4; 1.15.6;
Separate the (non-working) LFS kernel roll-forward code into its own file,
lfs_rfw.c.

Tell config to generate fs_ffs.h as vfs_bio.c checks for defined(FFS).
Include that header in vfs_bio.c so that bioops are not redefined.

branches: 1.13.4; 1.13.6; 1.13.8; 1.13.10; 1.13.12;
merge ktrace-lwp.

split out lfs_itimes(). It is used in fsck_lfs.

Experimental support for extended attributes on UFS1 file systems, using a
backing file per attribute type indexed by inode number to hold the extended
attributes.

This is working pretty well on my test systems, except for the "autostart"
feature. I need someone with a better handle on the VFS locking protocol
to go over that.

This is a work-in-progress. There are parts of this that could be re-factored
allowing this approach to be used on other types of file systems.

Adapted from FreeBSD.

Defflag UFS_DIRHASH.

branches: 1.9.4;
nuke trailing whitespace

Make `options FFS_NO_SNAPSHOT' only disable snapshot creation
while not trashing existing snapshots.

Approved by: core@

change ffs_snapshot to !ffs_no_snapshot

Make ffs snapshots be enabled by 'option FFS_SNAPSHOT'

Add file system snapshots to kernel configs.

- Ffs internal snapshots get compiled in unconditionally.

- File system snapshot device fss(4) added to all kernel configs that
have a disk. Device is commented out on all non-GENERIC kernels.

Reviewed by: Jason Thorpe <thorpej@netbsd.org>

branches: 1.4.2;
Bring in Ian Dowse's Dirhash from FreeBSD. Hash tables of
directories are created on the fly and used to increase
performance by circumventing ufs_lookup's linear search.

Dirhash is enabled by the UFS_DIRHASH option, but not
by default.

branches: 1.3.4;
Add ffs internal snapshots. Written by Marshall Kirk McKusick for FreeBSD.

- Not enabled by default. Needs kernel option FFS_SNAPSHOT.
- Change parameters of ffs_blkfree.
- Let the copy-on-write functions return an error so spec_strategy
may fail if the copy-on-write fails.
- Change genfs_*lock*() to use vp->v_vnlock instead of &vp->v_lock.
- Add flag B_METAONLY to VOP_BALLOC to return indirect block buffer.
- Add a function ffs_checkfreefile needed for snapshot creation.
- Add special handling of snapshot files:
Snapshots may not be opened for writing and the attributes are read-only.
Use the mtime as the time this snapshot was taken.
Deny mtime updates for snapshot files.
- Add function transferlockers to transfer any waiting processes from
one lock to another.
- Add vfsop VFS_SNAPSHOT to take a snapshot and make it accessible through
a vnode.
- Add snapshot support to ls, fsck_ffs and dump.

Welcome to 2.0F.

Approved by: Jason R. Thorpe <thorpej@netbsd.org>

branches: 1.2.6;
Add support for the Apple UFS variation on ffs
This is the bulk of PR #17345

The general approach is to use a run time deteriminable value
for DIRBLKSIZ. Additional allowances are included for using
MAXSYMLINKLEN with FS_42INODEFMT and a shift in the cylinder group
cluster summary count array. Support is added for managing
the Apple UFS volume label.

branches: 1.1.6; 1.1.8;
Cleanup how file system configuration information is declared, grouping
related information together, with the file system code itself.

This is just low-hanging fruit -- more to come.

Extended attribute support for ffsv2, from FreeBSD.

remove noncompilable WAPBL_DEBUG_INODES

PR kern/49554 by Thomas Klausner

Don't include any of the ufs code if all the dependent filesystems are missing.

Include the fs scaffolding when none of the ffs/mfs/ext2fs/chfs is included
so a MODULAR kernel links.

branches: 1.43.16;
add support for extended attributes in ext2fs for ext3/ext4; read-only for now

GSoC 2016 (Hrishikesh Goyal): Htree index support from FreeBSD

add extents.

Change lfs from hash table to vcache.

- Change lfs_valloc() to return an inode number and version instead of
a vnode and move lfs_ialloc() and lfs_vcreate() to new lfs_init_vnode().

- Add lfs_valloc_fixed() to allocate a known inode, used by kernel
roll forward.

- Remove lfs_*ref(), these functions cannot coexist with vcache and
their commented behaviour is far away from their implementation.

- Add the cleaner lwp and blockinfo to struct ulfsmount so lfs_loadvnode()
may use hints from the cleaner.

- Remove vnode locks from ulfs_lookup() like we did with ufs_lookup().

Change chfs from hashlist to vcache.

branches: 1.38.2;
Remove unused extended attributes kernel options

As Masao Uebayashi pointed to me, UFS_EXTATTR_AUTOSTART, LFS_EXTATTR_AUTOSTART
and UFS_EXTATTR_AUTOCREATE are not used anywhere in the code. Remove them
as they have been obsolete for a long time:
UFS_EXTATTR_AUTOSTART was replaced by mount -o extattr
LFS_EXTATTR_AUTOSTART was created to match obsolete UFS_EXTATTR_AUTOSTART
UFS_EXTATTR_AUTOCREATE was replaced by sysctl vfs.ffs.extattr_autocreate

To make sure that I'm not doing wrong, try to define ffs/ufs/vfs dependencies
a little more strictly.

branches: 1.36.2;
Move lfs_getpages and lfs_putpages to their own file.

Add a global vnode cache:

- vcache_get() retrieves a referenced and initialised vnode / fs node pair.
- vcache_remove() removes a vnode / fs node pair from the cache.

On cache miss vcache_get() calls new vfs operation vfs_loadvnode() to
initialise a vnode / fs node pair. This call is guaranteed exclusive,
no other thread will try to load this vnode / fs node pair.

Convert ufs/ext2fs, ufs/ffs and ufs/mfs to use this interface.

Remove now unused ufs/ufs_ihash

Discussed on tech-kern.

Welcome to 6.99.41

branches: 1.34.2;
Merge riastradh-drm2 to HEAD.

Collect the pieces of lfs rename into lfs_rename.c, and sprinkle static.

branches: 1.32.2; 1.32.4;
G/C

Apparently we also need to cut and paste ffs_snapgone() in order to be
able to link the ufs code.

Instead of actually cutting and pasting it (as it depends on ffs-only
things) implement it as panic. Probably we'll be able to demonstrate
later that it's unreachable.

XXX: Someone should add snapgone to struct ufs_ops in ufs/ufsmount.h,
XXX: and fix ufs/ufs_lookup.c to not hardwire ffs.

Split lfs from ufs step 3: rearrange config stuff.
Add new options:
LFS_EI
LFS_DIRHASH
LFS_EXTATTR
LFS_EXTATTR_AUTOSTART
LFS_QUOTA
LFS_QUOTA2

and update code referring to the corresponding FFS and UFS config
symbols to use the LFS versions. Disable the one extant reference
to APPLE_UFS in the ulfs files. Use opt_lfs.h only, not opt_ffs.h.

branches: 1.29.2;
Adapt ffs, lfs, and ext2fs to use genfs_rename.

ok dholland, rmind

chfs/debug.c deleted from files.ufs

branches: 1.27.2;
Import CHFS, which was formerly known as ChewieFS.

CHFS is a file system for flash devices developed by the
Software Engineering Department at University of Szeged, Hungary.

http://chewiefs.sed.hu/

Thanks for all who made it possible.

branches: 1.26.4;
Add a new libquota library, which contains some blocks to build and/or
parse quota plists; as well as a getfsquota() function to retrieve quotas
for a single id from a single filesystem (whatever filesystem this is:
a local quota-enabled fs or NFS). This is build on functions getufsquota()
(for local filesystems with UFS-like quotas) and getnfsquota();
which are also available to userland programs.
move functions from quota2_subr.c to libquota or libprop as appropriate,
and ajust in-tree quota tools.
move some declarations from kernel headers to either sys/quota.h or
quota/quota.h as appropriate. ufs/ufs/quota.h still installed because
it's needed by other installed ufs headers.
ufs/ufs/quota1.h still installed as a quick&dirty way to get a code
using the old quotactl() to compile (just include ufs/ufs/quota1.h instead of
ufs/ufs/quota.h - old code won't compile without this change and this is
on purpose).
Discussed on tech-kern@ and tech-net@ (long thread, but not much about
libquota itself ...)

merge the bouyer-quota2 branch. This adds a new on-disk format
to store disk quota usage and limits, integrated with ffs
metadata. Usage is checked by fsck_ffs (no more quotacheck)
and is covered by the WAPBL journal. Enabled with kernel
option QUOTA2 (added where QUOTA was enabled in kernel config files),
turned on with tunefs(8) on a per-filesystem
basis. mount_mfs(8) can also turn quotas on.

See http://mail-index.netbsd.org/tech-kern/2011/02/19/msg010025.html
for details.

branches: 1.24.2; 1.24.4; 1.24.6;
fs_lfs.h is no longer necessary

Remove fs_mfs.h from users because it is now unnecessary and don't
generate fs_mfs.h anymore.

Make mfs_initminiroot() mandatory. Allows to remove #ifdef MFS.

Don't generate unused fs_thefs.h headers.

Remove last #ifdef FFS. Do this by making lfs include ffs.
Could use UFS_OPS, but:

1) the lfs kernel module depends on full ffs already anway
2) lfs is being split from ufs, so this will automatically
go away soon
3) chances of anyone wanting an lfs-only kernel are pretty slim
4) i'm too lazy to figure out how to test ffs_snapgone() is
still called properly if I change the call ;)

branches: 1.19.2;
PR kern/26878 FFSv2 + softdep = livelock (no free ram)
PR kern/16942 panic with softdep and quotas
PR kern/19565 panic: softdep_write_inodeblock: indirect pointer #1 mismatch
PR kern/26274 softdep panic: allocdirect_merge: ...
PR kern/26374 Long delay before non-root users can write to softdep partitions
PR kern/28621 1.6.x "vp != NULL" panic in ffs_softdep.c:4653 while unmounting a softdep (+quota) filesystem
PR kern/29513 FFS+Softdep panic with unfsck-able file-corruption
PR kern/31544 The ffs softdep code appears to fail to write dirty bits to disk
PR kern/31981 stopping scsi disk can cause panic (softdep)
PR kern/32116 kernel panic in softdep (assertion failure)
PR kern/32532 softdep_trackbufs deadlock
PR kern/37191 softdep: locking against myself
PR kern/40474 Kernel panic after remounting raid root with softdep

Retire softdep, pass 2. As discussed and later formally announced on the
mailing lists.

branches: 1.18.2; 1.18.8;
Merge the simonb-wapbl branch. From the original branch commit:

Add Wasabi System's WAPBL (Write Ahead Physical Block Logging)
journaling code. Originally written by Darrin B. Jewell while
at Wasabi and updated to -current by Antti Kantee, Andy Doran,
Greg Oster and Simon Burge.

OK'd by core@, releng@.

branches: 1.17.6; 1.17.10; 1.17.12; 1.17.14; 1.17.16;
defflag LFS_KERNEL_RFW (in opt_lfs.h).
Note: lfs_rfw.c doesn't compile if you define the option; locking API fallout?

branches: 1.16.24; 1.16.34; 1.16.36; 1.16.38;
Let ext2fs be built even when none of ffs, lfs and mfs are present.

branches: 1.15.4; 1.15.6;
Separate the (non-working) LFS kernel roll-forward code into its own file,
lfs_rfw.c.

Tell config to generate fs_ffs.h as vfs_bio.c checks for defined(FFS).
Include that header in vfs_bio.c so that bioops are not redefined.

branches: 1.13.4; 1.13.6; 1.13.8; 1.13.10; 1.13.12;
merge ktrace-lwp.

split out lfs_itimes(). It is used in fsck_lfs.

Experimental support for extended attributes on UFS1 file systems, using a
backing file per attribute type indexed by inode number to hold the extended
attributes.

This is working pretty well on my test systems, except for the "autostart"
feature. I need someone with a better handle on the VFS locking protocol
to go over that.

This is a work-in-progress. There are parts of this that could be re-factored
allowing this approach to be used on other types of file systems.

Adapted from FreeBSD.

Defflag UFS_DIRHASH.

branches: 1.9.4;
nuke trailing whitespace

Make `options FFS_NO_SNAPSHOT' only disable snapshot creation
while not trashing existing snapshots.

Approved by: core@

change ffs_snapshot to !ffs_no_snapshot

Make ffs snapshots be enabled by 'option FFS_SNAPSHOT'

Add file system snapshots to kernel configs.

- Ffs internal snapshots get compiled in unconditionally.

- File system snapshot device fss(4) added to all kernel configs that
have a disk. Device is commented out on all non-GENERIC kernels.

Reviewed by: Jason Thorpe <thorpej@netbsd.org>

branches: 1.4.2;
Bring in Ian Dowse's Dirhash from FreeBSD. Hash tables of
directories are created on the fly and used to increase
performance by circumventing ufs_lookup's linear search.

Dirhash is enabled by the UFS_DIRHASH option, but not
by default.

branches: 1.3.4;
Add ffs internal snapshots. Written by Marshall Kirk McKusick for FreeBSD.

- Not enabled by default. Needs kernel option FFS_SNAPSHOT.
- Change parameters of ffs_blkfree.
- Let the copy-on-write functions return an error so spec_strategy
may fail if the copy-on-write fails.
- Change genfs_*lock*() to use vp->v_vnlock instead of &vp->v_lock.
- Add flag B_METAONLY to VOP_BALLOC to return indirect block buffer.
- Add a function ffs_checkfreefile needed for snapshot creation.
- Add special handling of snapshot files:
Snapshots may not be opened for writing and the attributes are read-only.
Use the mtime as the time this snapshot was taken.
Deny mtime updates for snapshot files.
- Add function transferlockers to transfer any waiting processes from
one lock to another.
- Add vfsop VFS_SNAPSHOT to take a snapshot and make it accessible through
a vnode.
- Add snapshot support to ls, fsck_ffs and dump.

Welcome to 2.0F.

Approved by: Jason R. Thorpe <thorpej@netbsd.org>

branches: 1.2.6;
Add support for the Apple UFS variation on ffs
This is the bulk of PR #17345

The general approach is to use a run time deteriminable value
for DIRBLKSIZ. Additional allowances are included for using
MAXSYMLINKLEN with FS_42INODEFMT and a shift in the cylinder group
cluster summary count array. Support is added for managing
the Apple UFS volume label.

branches: 1.1.6; 1.1.8;
Cleanup how file system configuration information is declared, grouping
related information together, with the file system code itself.

This is just low-hanging fruit -- more to come.

remove noncompilable WAPBL_DEBUG_INODES

PR kern/49554 by Thomas Klausner

Don't include any of the ufs code if all the dependent filesystems are missing.

Include the fs scaffolding when none of the ffs/mfs/ext2fs/chfs is included
so a MODULAR kernel links.

add support for extended attributes in ext2fs for ext3/ext4; read-only for now

GSoC 2016 (Hrishikesh Goyal): Htree index support from FreeBSD

add extents.

Change lfs from hash table to vcache.

- Change lfs_valloc() to return an inode number and version instead of
a vnode and move lfs_ialloc() and lfs_vcreate() to new lfs_init_vnode().

- Add lfs_valloc_fixed() to allocate a known inode, used by kernel
roll forward.

- Remove lfs_*ref(), these functions cannot coexist with vcache and
their commented behaviour is far away from their implementation.

- Add the cleaner lwp and blockinfo to struct ulfsmount so lfs_loadvnode()
may use hints from the cleaner.

- Remove vnode locks from ulfs_lookup() like we did with ufs_lookup().

Change chfs from hashlist to vcache.

branches: 1.38.2;
Remove unused extended attributes kernel options

As Masao Uebayashi pointed to me, UFS_EXTATTR_AUTOSTART, LFS_EXTATTR_AUTOSTART
and UFS_EXTATTR_AUTOCREATE are not used anywhere in the code. Remove them
as they have been obsolete for a long time:
UFS_EXTATTR_AUTOSTART was replaced by mount -o extattr
LFS_EXTATTR_AUTOSTART was created to match obsolete UFS_EXTATTR_AUTOSTART
UFS_EXTATTR_AUTOCREATE was replaced by sysctl vfs.ffs.extattr_autocreate

To make sure that I'm not doing wrong, try to define ffs/ufs/vfs dependencies
a little more strictly.

branches: 1.36.2;
Move lfs_getpages and lfs_putpages to their own file.

Add a global vnode cache:

- vcache_get() retrieves a referenced and initialised vnode / fs node pair.
- vcache_remove() removes a vnode / fs node pair from the cache.

On cache miss vcache_get() calls new vfs operation vfs_loadvnode() to
initialise a vnode / fs node pair. This call is guaranteed exclusive,
no other thread will try to load this vnode / fs node pair.

Convert ufs/ext2fs, ufs/ffs and ufs/mfs to use this interface.

Remove now unused ufs/ufs_ihash

Discussed on tech-kern.

Welcome to 6.99.41

branches: 1.34.2;
Merge riastradh-drm2 to HEAD.

Collect the pieces of lfs rename into lfs_rename.c, and sprinkle static.

branches: 1.32.2; 1.32.4;
G/C

Apparently we also need to cut and paste ffs_snapgone() in order to be
able to link the ufs code.

Instead of actually cutting and pasting it (as it depends on ffs-only
things) implement it as panic. Probably we'll be able to demonstrate
later that it's unreachable.

XXX: Someone should add snapgone to struct ufs_ops in ufs/ufsmount.h,
XXX: and fix ufs/ufs_lookup.c to not hardwire ffs.

Split lfs from ufs step 3: rearrange config stuff.
Add new options:
LFS_EI
LFS_DIRHASH
LFS_EXTATTR
LFS_EXTATTR_AUTOSTART
LFS_QUOTA
LFS_QUOTA2

and update code referring to the corresponding FFS and UFS config
symbols to use the LFS versions. Disable the one extant reference
to APPLE_UFS in the ulfs files. Use opt_lfs.h only, not opt_ffs.h.

branches: 1.29.2;
Adapt ffs, lfs, and ext2fs to use genfs_rename.

ok dholland, rmind

chfs/debug.c deleted from files.ufs

branches: 1.27.2;
Import CHFS, which was formerly known as ChewieFS.

CHFS is a file system for flash devices developed by the
Software Engineering Department at University of Szeged, Hungary.

http://chewiefs.sed.hu/

Thanks for all who made it possible.

branches: 1.26.4;
Add a new libquota library, which contains some blocks to build and/or
parse quota plists; as well as a getfsquota() function to retrieve quotas
for a single id from a single filesystem (whatever filesystem this is:
a local quota-enabled fs or NFS). This is build on functions getufsquota()
(for local filesystems with UFS-like quotas) and getnfsquota();
which are also available to userland programs.
move functions from quota2_subr.c to libquota or libprop as appropriate,
and ajust in-tree quota tools.
move some declarations from kernel headers to either sys/quota.h or
quota/quota.h as appropriate. ufs/ufs/quota.h still installed because
it's needed by other installed ufs headers.
ufs/ufs/quota1.h still installed as a quick&dirty way to get a code
using the old quotactl() to compile (just include ufs/ufs/quota1.h instead of
ufs/ufs/quota.h - old code won't compile without this change and this is
on purpose).
Discussed on tech-kern@ and tech-net@ (long thread, but not much about
libquota itself ...)

merge the bouyer-quota2 branch. This adds a new on-disk format
to store disk quota usage and limits, integrated with ffs
metadata. Usage is checked by fsck_ffs (no more quotacheck)
and is covered by the WAPBL journal. Enabled with kernel
option QUOTA2 (added where QUOTA was enabled in kernel config files),
turned on with tunefs(8) on a per-filesystem
basis. mount_mfs(8) can also turn quotas on.

See http://mail-index.netbsd.org/tech-kern/2011/02/19/msg010025.html
for details.

branches: 1.24.2; 1.24.4; 1.24.6;
fs_lfs.h is no longer necessary

Remove fs_mfs.h from users because it is now unnecessary and don't
generate fs_mfs.h anymore.

Make mfs_initminiroot() mandatory. Allows to remove #ifdef MFS.

Don't generate unused fs_thefs.h headers.

Remove last #ifdef FFS. Do this by making lfs include ffs.
Could use UFS_OPS, but:

1) the lfs kernel module depends on full ffs already anway
2) lfs is being split from ufs, so this will automatically
go away soon
3) chances of anyone wanting an lfs-only kernel are pretty slim
4) i'm too lazy to figure out how to test ffs_snapgone() is
still called properly if I change the call ;)

branches: 1.19.2;
PR kern/26878 FFSv2 + softdep = livelock (no free ram)
PR kern/16942 panic with softdep and quotas
PR kern/19565 panic: softdep_write_inodeblock: indirect pointer #1 mismatch
PR kern/26274 softdep panic: allocdirect_merge: ...
PR kern/26374 Long delay before non-root users can write to softdep partitions
PR kern/28621 1.6.x "vp != NULL" panic in ffs_softdep.c:4653 while unmounting a softdep (+quota) filesystem
PR kern/29513 FFS+Softdep panic with unfsck-able file-corruption
PR kern/31544 The ffs softdep code appears to fail to write dirty bits to disk
PR kern/31981 stopping scsi disk can cause panic (softdep)
PR kern/32116 kernel panic in softdep (assertion failure)
PR kern/32532 softdep_trackbufs deadlock
PR kern/37191 softdep: locking against myself
PR kern/40474 Kernel panic after remounting raid root with softdep

Retire softdep, pass 2. As discussed and later formally announced on the
mailing lists.

branches: 1.18.2; 1.18.8;
Merge the simonb-wapbl branch. From the original branch commit:

Add Wasabi System's WAPBL (Write Ahead Physical Block Logging)
journaling code. Originally written by Darrin B. Jewell while
at Wasabi and updated to -current by Antti Kantee, Andy Doran,
Greg Oster and Simon Burge.

OK'd by core@, releng@.

branches: 1.17.6; 1.17.10; 1.17.12; 1.17.14; 1.17.16;
defflag LFS_KERNEL_RFW (in opt_lfs.h).
Note: lfs_rfw.c doesn't compile if you define the option; locking API fallout?

branches: 1.16.24; 1.16.34; 1.16.36; 1.16.38;
Let ext2fs be built even when none of ffs, lfs and mfs are present.

branches: 1.15.4; 1.15.6;
Separate the (non-working) LFS kernel roll-forward code into its own file,
lfs_rfw.c.

Tell config to generate fs_ffs.h as vfs_bio.c checks for defined(FFS).
Include that header in vfs_bio.c so that bioops are not redefined.

branches: 1.13.4; 1.13.6; 1.13.8; 1.13.10; 1.13.12;
merge ktrace-lwp.

split out lfs_itimes(). It is used in fsck_lfs.

Experimental support for extended attributes on UFS1 file systems, using a
backing file per attribute type indexed by inode number to hold the extended
attributes.

This is working pretty well on my test systems, except for the "autostart"
feature. I need someone with a better handle on the VFS locking protocol
to go over that.

This is a work-in-progress. There are parts of this that could be re-factored
allowing this approach to be used on other types of file systems.

Adapted from FreeBSD.

Defflag UFS_DIRHASH.

branches: 1.9.4;
nuke trailing whitespace

Make `options FFS_NO_SNAPSHOT' only disable snapshot creation
while not trashing existing snapshots.

Approved by: core@

change ffs_snapshot to !ffs_no_snapshot

Make ffs snapshots be enabled by 'option FFS_SNAPSHOT'

Add file system snapshots to kernel configs.

- Ffs internal snapshots get compiled in unconditionally.

- File system snapshot device fss(4) added to all kernel configs that
have a disk. Device is commented out on all non-GENERIC kernels.

Reviewed by: Jason Thorpe <thorpej@netbsd.org>

branches: 1.4.2;
Bring in Ian Dowse's Dirhash from FreeBSD. Hash tables of
directories are created on the fly and used to increase
performance by circumventing ufs_lookup's linear search.

Dirhash is enabled by the UFS_DIRHASH option, but not
by default.

branches: 1.3.4;
Add ffs internal snapshots. Written by Marshall Kirk McKusick for FreeBSD.

- Not enabled by default. Needs kernel option FFS_SNAPSHOT.
- Change parameters of ffs_blkfree.
- Let the copy-on-write functions return an error so spec_strategy
may fail if the copy-on-write fails.
- Change genfs_*lock*() to use vp->v_vnlock instead of &vp->v_lock.
- Add flag B_METAONLY to VOP_BALLOC to return indirect block buffer.
- Add a function ffs_checkfreefile needed for snapshot creation.
- Add special handling of snapshot files:
Snapshots may not be opened for writing and the attributes are read-only.
Use the mtime as the time this snapshot was taken.
Deny mtime updates for snapshot files.
- Add function transferlockers to transfer any waiting processes from
one lock to another.
- Add vfsop VFS_SNAPSHOT to take a snapshot and make it accessible through
a vnode.
- Add snapshot support to ls, fsck_ffs and dump.

Welcome to 2.0F.

Approved by: Jason R. Thorpe <thorpej@netbsd.org>

branches: 1.2.6;
Add support for the Apple UFS variation on ffs
This is the bulk of PR #17345

The general approach is to use a run time deteriminable value
for DIRBLKSIZ. Additional allowances are included for using
MAXSYMLINKLEN with FS_42INODEFMT and a shift in the cylinder group
cluster summary count array. Support is added for managing
the Apple UFS volume label.

branches: 1.1.6; 1.1.8;
Cleanup how file system configuration information is declared, grouping
related information together, with the file system code itself.

This is just low-hanging fruit -- more to come.

Don't include any of the ufs code if all the dependent filesystems are missing.

Include the fs scaffolding when none of the ffs/mfs/ext2fs/chfs is included
so a MODULAR kernel links.

add support for extended attributes in ext2fs for ext3/ext4; read-only for now

GSoC 2016 (Hrishikesh Goyal): Htree index support from FreeBSD

add extents.

Change lfs from hash table to vcache.

- Change lfs_valloc() to return an inode number and version instead of
a vnode and move lfs_ialloc() and lfs_vcreate() to new lfs_init_vnode().

- Add lfs_valloc_fixed() to allocate a known inode, used by kernel
roll forward.

- Remove lfs_*ref(), these functions cannot coexist with vcache and
their commented behaviour is far away from their implementation.

- Add the cleaner lwp and blockinfo to struct ulfsmount so lfs_loadvnode()
may use hints from the cleaner.

- Remove vnode locks from ulfs_lookup() like we did with ufs_lookup().

Change chfs from hashlist to vcache.

branches: 1.38.2;
Remove unused extended attributes kernel options

As Masao Uebayashi pointed to me, UFS_EXTATTR_AUTOSTART, LFS_EXTATTR_AUTOSTART
and UFS_EXTATTR_AUTOCREATE are not used anywhere in the code. Remove them
as they have been obsolete for a long time:
UFS_EXTATTR_AUTOSTART was replaced by mount -o extattr
LFS_EXTATTR_AUTOSTART was created to match obsolete UFS_EXTATTR_AUTOSTART
UFS_EXTATTR_AUTOCREATE was replaced by sysctl vfs.ffs.extattr_autocreate

To make sure that I'm not doing wrong, try to define ffs/ufs/vfs dependencies
a little more strictly.

branches: 1.36.2;
Move lfs_getpages and lfs_putpages to their own file.

Add a global vnode cache:

- vcache_get() retrieves a referenced and initialised vnode / fs node pair.
- vcache_remove() removes a vnode / fs node pair from the cache.

On cache miss vcache_get() calls new vfs operation vfs_loadvnode() to
initialise a vnode / fs node pair. This call is guaranteed exclusive,
no other thread will try to load this vnode / fs node pair.

Convert ufs/ext2fs, ufs/ffs and ufs/mfs to use this interface.

Remove now unused ufs/ufs_ihash

Discussed on tech-kern.

Welcome to 6.99.41

branches: 1.34.2;
Merge riastradh-drm2 to HEAD.

Collect the pieces of lfs rename into lfs_rename.c, and sprinkle static.

branches: 1.32.2; 1.32.4;
G/C

Apparently we also need to cut and paste ffs_snapgone() in order to be
able to link the ufs code.

Instead of actually cutting and pasting it (as it depends on ffs-only
things) implement it as panic. Probably we'll be able to demonstrate
later that it's unreachable.

XXX: Someone should add snapgone to struct ufs_ops in ufs/ufsmount.h,
XXX: and fix ufs/ufs_lookup.c to not hardwire ffs.

Split lfs from ufs step 3: rearrange config stuff.
Add new options:
LFS_EI
LFS_DIRHASH
LFS_EXTATTR
LFS_EXTATTR_AUTOSTART
LFS_QUOTA
LFS_QUOTA2

and update code referring to the corresponding FFS and UFS config
symbols to use the LFS versions. Disable the one extant reference
to APPLE_UFS in the ulfs files. Use opt_lfs.h only, not opt_ffs.h.

branches: 1.29.2;
Adapt ffs, lfs, and ext2fs to use genfs_rename.

ok dholland, rmind

chfs/debug.c deleted from files.ufs

branches: 1.27.2;
Import CHFS, which was formerly known as ChewieFS.

CHFS is a file system for flash devices developed by the
Software Engineering Department at University of Szeged, Hungary.

http://chewiefs.sed.hu/

Thanks for all who made it possible.

branches: 1.26.4;
Add a new libquota library, which contains some blocks to build and/or
parse quota plists; as well as a getfsquota() function to retrieve quotas
for a single id from a single filesystem (whatever filesystem this is:
a local quota-enabled fs or NFS). This is build on functions getufsquota()
(for local filesystems with UFS-like quotas) and getnfsquota();
which are also available to userland programs.
move functions from quota2_subr.c to libquota or libprop as appropriate,
and ajust in-tree quota tools.
move some declarations from kernel headers to either sys/quota.h or
quota/quota.h as appropriate. ufs/ufs/quota.h still installed because
it's needed by other installed ufs headers.
ufs/ufs/quota1.h still installed as a quick&dirty way to get a code
using the old quotactl() to compile (just include ufs/ufs/quota1.h instead of
ufs/ufs/quota.h - old code won't compile without this change and this is
on purpose).
Discussed on tech-kern@ and tech-net@ (long thread, but not much about
libquota itself ...)

merge the bouyer-quota2 branch. This adds a new on-disk format
to store disk quota usage and limits, integrated with ffs
metadata. Usage is checked by fsck_ffs (no more quotacheck)
and is covered by the WAPBL journal. Enabled with kernel
option QUOTA2 (added where QUOTA was enabled in kernel config files),
turned on with tunefs(8) on a per-filesystem
basis. mount_mfs(8) can also turn quotas on.

See http://mail-index.netbsd.org/tech-kern/2011/02/19/msg010025.html
for details.

branches: 1.24.2; 1.24.4; 1.24.6;
fs_lfs.h is no longer necessary

Remove fs_mfs.h from users because it is now unnecessary and don't
generate fs_mfs.h anymore.

Make mfs_initminiroot() mandatory. Allows to remove #ifdef MFS.

Don't generate unused fs_thefs.h headers.

Remove last #ifdef FFS. Do this by making lfs include ffs.
Could use UFS_OPS, but:

1) the lfs kernel module depends on full ffs already anway
2) lfs is being split from ufs, so this will automatically
go away soon
3) chances of anyone wanting an lfs-only kernel are pretty slim
4) i'm too lazy to figure out how to test ffs_snapgone() is
still called properly if I change the call ;)

branches: 1.19.2;
PR kern/26878 FFSv2 + softdep = livelock (no free ram)
PR kern/16942 panic with softdep and quotas
PR kern/19565 panic: softdep_write_inodeblock: indirect pointer #1 mismatch
PR kern/26274 softdep panic: allocdirect_merge: ...
PR kern/26374 Long delay before non-root users can write to softdep partitions
PR kern/28621 1.6.x "vp != NULL" panic in ffs_softdep.c:4653 while unmounting a softdep (+quota) filesystem
PR kern/29513 FFS+Softdep panic with unfsck-able file-corruption
PR kern/31544 The ffs softdep code appears to fail to write dirty bits to disk
PR kern/31981 stopping scsi disk can cause panic (softdep)
PR kern/32116 kernel panic in softdep (assertion failure)
PR kern/32532 softdep_trackbufs deadlock
PR kern/37191 softdep: locking against myself
PR kern/40474 Kernel panic after remounting raid root with softdep

Retire softdep, pass 2. As discussed and later formally announced on the
mailing lists.

branches: 1.18.2; 1.18.8;
Merge the simonb-wapbl branch. From the original branch commit:

Add Wasabi System's WAPBL (Write Ahead Physical Block Logging)
journaling code. Originally written by Darrin B. Jewell while
at Wasabi and updated to -current by Antti Kantee, Andy Doran,
Greg Oster and Simon Burge.

OK'd by core@, releng@.

branches: 1.17.6; 1.17.10; 1.17.12; 1.17.14; 1.17.16;
defflag LFS_KERNEL_RFW (in opt_lfs.h).
Note: lfs_rfw.c doesn't compile if you define the option; locking API fallout?

branches: 1.16.24; 1.16.34; 1.16.36; 1.16.38;
Let ext2fs be built even when none of ffs, lfs and mfs are present.

branches: 1.15.4; 1.15.6;
Separate the (non-working) LFS kernel roll-forward code into its own file,
lfs_rfw.c.

Tell config to generate fs_ffs.h as vfs_bio.c checks for defined(FFS).
Include that header in vfs_bio.c so that bioops are not redefined.

branches: 1.13.4; 1.13.6; 1.13.8; 1.13.10; 1.13.12;
merge ktrace-lwp.

split out lfs_itimes(). It is used in fsck_lfs.

Experimental support for extended attributes on UFS1 file systems, using a
backing file per attribute type indexed by inode number to hold the extended
attributes.

This is working pretty well on my test systems, except for the "autostart"
feature. I need someone with a better handle on the VFS locking protocol
to go over that.

This is a work-in-progress. There are parts of this that could be re-factored
allowing this approach to be used on other types of file systems.

Adapted from FreeBSD.

Defflag UFS_DIRHASH.

branches: 1.9.4;
nuke trailing whitespace

Make `options FFS_NO_SNAPSHOT' only disable snapshot creation
while not trashing existing snapshots.

Approved by: core@

change ffs_snapshot to !ffs_no_snapshot

Make ffs snapshots be enabled by 'option FFS_SNAPSHOT'

Add file system snapshots to kernel configs.

- Ffs internal snapshots get compiled in unconditionally.

- File system snapshot device fss(4) added to all kernel configs that
have a disk. Device is commented out on all non-GENERIC kernels.

Reviewed by: Jason Thorpe <thorpej@netbsd.org>

branches: 1.4.2;
Bring in Ian Dowse's Dirhash from FreeBSD. Hash tables of
directories are created on the fly and used to increase
performance by circumventing ufs_lookup's linear search.

Dirhash is enabled by the UFS_DIRHASH option, but not
by default.

branches: 1.3.4;
Add ffs internal snapshots. Written by Marshall Kirk McKusick for FreeBSD.

- Not enabled by default. Needs kernel option FFS_SNAPSHOT.
- Change parameters of ffs_blkfree.
- Let the copy-on-write functions return an error so spec_strategy
may fail if the copy-on-write fails.
- Change genfs_*lock*() to use vp->v_vnlock instead of &vp->v_lock.
- Add flag B_METAONLY to VOP_BALLOC to return indirect block buffer.
- Add a function ffs_checkfreefile needed for snapshot creation.
- Add special handling of snapshot files:
Snapshots may not be opened for writing and the attributes are read-only.
Use the mtime as the time this snapshot was taken.
Deny mtime updates for snapshot files.
- Add function transferlockers to transfer any waiting processes from
one lock to another.
- Add vfsop VFS_SNAPSHOT to take a snapshot and make it accessible through
a vnode.
- Add snapshot support to ls, fsck_ffs and dump.

Welcome to 2.0F.

Approved by: Jason R. Thorpe <thorpej@netbsd.org>

branches: 1.2.6;
Add support for the Apple UFS variation on ffs
This is the bulk of PR #17345

The general approach is to use a run time deteriminable value
for DIRBLKSIZ. Additional allowances are included for using
MAXSYMLINKLEN with FS_42INODEFMT and a shift in the cylinder group
cluster summary count array. Support is added for managing
the Apple UFS volume label.

branches: 1.1.6; 1.1.8;
Cleanup how file system configuration information is declared, grouping
related information together, with the file system code itself.

This is just low-hanging fruit -- more to come.

add support for extended attributes in ext2fs for ext3/ext4; read-only for now

GSoC 2016 (Hrishikesh Goyal): Htree index support from FreeBSD

add extents.

Change lfs from hash table to vcache.

- Change lfs_valloc() to return an inode number and version instead of
a vnode and move lfs_ialloc() and lfs_vcreate() to new lfs_init_vnode().

- Add lfs_valloc_fixed() to allocate a known inode, used by kernel
roll forward.

- Remove lfs_*ref(), these functions cannot coexist with vcache and
their commented behaviour is far away from their implementation.

- Add the cleaner lwp and blockinfo to struct ulfsmount so lfs_loadvnode()
may use hints from the cleaner.

- Remove vnode locks from ulfs_lookup() like we did with ufs_lookup().

Change chfs from hashlist to vcache.

branches: 1.38.2;
Remove unused extended attributes kernel options

As Masao Uebayashi pointed to me, UFS_EXTATTR_AUTOSTART, LFS_EXTATTR_AUTOSTART
and UFS_EXTATTR_AUTOCREATE are not used anywhere in the code. Remove them
as they have been obsolete for a long time:
UFS_EXTATTR_AUTOSTART was replaced by mount -o extattr
LFS_EXTATTR_AUTOSTART was created to match obsolete UFS_EXTATTR_AUTOSTART
UFS_EXTATTR_AUTOCREATE was replaced by sysctl vfs.ffs.extattr_autocreate

To make sure that I'm not doing wrong, try to define ffs/ufs/vfs dependencies
a little more strictly.

branches: 1.36.2;
Move lfs_getpages and lfs_putpages to their own file.

Add a global vnode cache:

- vcache_get() retrieves a referenced and initialised vnode / fs node pair.
- vcache_remove() removes a vnode / fs node pair from the cache.

On cache miss vcache_get() calls new vfs operation vfs_loadvnode() to
initialise a vnode / fs node pair. This call is guaranteed exclusive,
no other thread will try to load this vnode / fs node pair.

Convert ufs/ext2fs, ufs/ffs and ufs/mfs to use this interface.

Remove now unused ufs/ufs_ihash

Discussed on tech-kern.

Welcome to 6.99.41

branches: 1.34.2;
Merge riastradh-drm2 to HEAD.

Collect the pieces of lfs rename into lfs_rename.c, and sprinkle static.

branches: 1.32.2; 1.32.4;
G/C

Apparently we also need to cut and paste ffs_snapgone() in order to be
able to link the ufs code.

Instead of actually cutting and pasting it (as it depends on ffs-only
things) implement it as panic. Probably we'll be able to demonstrate
later that it's unreachable.

XXX: Someone should add snapgone to struct ufs_ops in ufs/ufsmount.h,
XXX: and fix ufs/ufs_lookup.c to not hardwire ffs.

Split lfs from ufs step 3: rearrange config stuff.
Add new options:
LFS_EI
LFS_DIRHASH
LFS_EXTATTR
LFS_EXTATTR_AUTOSTART
LFS_QUOTA
LFS_QUOTA2

and update code referring to the corresponding FFS and UFS config
symbols to use the LFS versions. Disable the one extant reference
to APPLE_UFS in the ulfs files. Use opt_lfs.h only, not opt_ffs.h.

branches: 1.29.2;
Adapt ffs, lfs, and ext2fs to use genfs_rename.

ok dholland, rmind

chfs/debug.c deleted from files.ufs

branches: 1.27.2;
Import CHFS, which was formerly known as ChewieFS.

CHFS is a file system for flash devices developed by the
Software Engineering Department at University of Szeged, Hungary.

http://chewiefs.sed.hu/

Thanks for all who made it possible.

branches: 1.26.4;
Add a new libquota library, which contains some blocks to build and/or
parse quota plists; as well as a getfsquota() function to retrieve quotas
for a single id from a single filesystem (whatever filesystem this is:
a local quota-enabled fs or NFS). This is build on functions getufsquota()
(for local filesystems with UFS-like quotas) and getnfsquota();
which are also available to userland programs.
move functions from quota2_subr.c to libquota or libprop as appropriate,
and ajust in-tree quota tools.
move some declarations from kernel headers to either sys/quota.h or
quota/quota.h as appropriate. ufs/ufs/quota.h still installed because
it's needed by other installed ufs headers.
ufs/ufs/quota1.h still installed as a quick&dirty way to get a code
using the old quotactl() to compile (just include ufs/ufs/quota1.h instead of
ufs/ufs/quota.h - old code won't compile without this change and this is
on purpose).
Discussed on tech-kern@ and tech-net@ (long thread, but not much about
libquota itself ...)

merge the bouyer-quota2 branch. This adds a new on-disk format
to store disk quota usage and limits, integrated with ffs
metadata. Usage is checked by fsck_ffs (no more quotacheck)
and is covered by the WAPBL journal. Enabled with kernel
option QUOTA2 (added where QUOTA was enabled in kernel config files),
turned on with tunefs(8) on a per-filesystem
basis. mount_mfs(8) can also turn quotas on.

See http://mail-index.netbsd.org/tech-kern/2011/02/19/msg010025.html
for details.

branches: 1.24.2; 1.24.4; 1.24.6;
fs_lfs.h is no longer necessary

Remove fs_mfs.h from users because it is now unnecessary and don't
generate fs_mfs.h anymore.

Make mfs_initminiroot() mandatory. Allows to remove #ifdef MFS.

Don't generate unused fs_thefs.h headers.

Remove last #ifdef FFS. Do this by making lfs include ffs.
Could use UFS_OPS, but:

1) the lfs kernel module depends on full ffs already anway
2) lfs is being split from ufs, so this will automatically
go away soon
3) chances of anyone wanting an lfs-only kernel are pretty slim
4) i'm too lazy to figure out how to test ffs_snapgone() is
still called properly if I change the call ;)

branches: 1.19.2;
PR kern/26878 FFSv2 + softdep = livelock (no free ram)
PR kern/16942 panic with softdep and quotas
PR kern/19565 panic: softdep_write_inodeblock: indirect pointer #1 mismatch
PR kern/26274 softdep panic: allocdirect_merge: ...
PR kern/26374 Long delay before non-root users can write to softdep partitions
PR kern/28621 1.6.x "vp != NULL" panic in ffs_softdep.c:4653 while unmounting a softdep (+quota) filesystem
PR kern/29513 FFS+Softdep panic with unfsck-able file-corruption
PR kern/31544 The ffs softdep code appears to fail to write dirty bits to disk
PR kern/31981 stopping scsi disk can cause panic (softdep)
PR kern/32116 kernel panic in softdep (assertion failure)
PR kern/32532 softdep_trackbufs deadlock
PR kern/37191 softdep: locking against myself
PR kern/40474 Kernel panic after remounting raid root with softdep

Retire softdep, pass 2. As discussed and later formally announced on the
mailing lists.

branches: 1.18.2; 1.18.8;
Merge the simonb-wapbl branch. From the original branch commit:

Add Wasabi System's WAPBL (Write Ahead Physical Block Logging)
journaling code. Originally written by Darrin B. Jewell while
at Wasabi and updated to -current by Antti Kantee, Andy Doran,
Greg Oster and Simon Burge.

OK'd by core@, releng@.

branches: 1.17.6; 1.17.10; 1.17.12; 1.17.14; 1.17.16;
defflag LFS_KERNEL_RFW (in opt_lfs.h).
Note: lfs_rfw.c doesn't compile if you define the option; locking API fallout?

branches: 1.16.24; 1.16.34; 1.16.36; 1.16.38;
Let ext2fs be built even when none of ffs, lfs and mfs are present.

branches: 1.15.4; 1.15.6;
Separate the (non-working) LFS kernel roll-forward code into its own file,
lfs_rfw.c.

Tell config to generate fs_ffs.h as vfs_bio.c checks for defined(FFS).
Include that header in vfs_bio.c so that bioops are not redefined.

branches: 1.13.4; 1.13.6; 1.13.8; 1.13.10; 1.13.12;
merge ktrace-lwp.

split out lfs_itimes(). It is used in fsck_lfs.

Experimental support for extended attributes on UFS1 file systems, using a
backing file per attribute type indexed by inode number to hold the extended
attributes.

This is working pretty well on my test systems, except for the "autostart"
feature. I need someone with a better handle on the VFS locking protocol
to go over that.

This is a work-in-progress. There are parts of this that could be re-factored
allowing this approach to be used on other types of file systems.

Adapted from FreeBSD.

Defflag UFS_DIRHASH.

branches: 1.9.4;
nuke trailing whitespace

Make `options FFS_NO_SNAPSHOT' only disable snapshot creation
while not trashing existing snapshots.

Approved by: core@

change ffs_snapshot to !ffs_no_snapshot

Make ffs snapshots be enabled by 'option FFS_SNAPSHOT'

Add file system snapshots to kernel configs.

- Ffs internal snapshots get compiled in unconditionally.

- File system snapshot device fss(4) added to all kernel configs that
have a disk. Device is commented out on all non-GENERIC kernels.

Reviewed by: Jason Thorpe <thorpej@netbsd.org>

branches: 1.4.2;
Bring in Ian Dowse's Dirhash from FreeBSD. Hash tables of
directories are created on the fly and used to increase
performance by circumventing ufs_lookup's linear search.

Dirhash is enabled by the UFS_DIRHASH option, but not
by default.

branches: 1.3.4;
Add ffs internal snapshots. Written by Marshall Kirk McKusick for FreeBSD.

- Not enabled by default. Needs kernel option FFS_SNAPSHOT.
- Change parameters of ffs_blkfree.
- Let the copy-on-write functions return an error so spec_strategy
may fail if the copy-on-write fails.
- Change genfs_*lock*() to use vp->v_vnlock instead of &vp->v_lock.
- Add flag B_METAONLY to VOP_BALLOC to return indirect block buffer.
- Add a function ffs_checkfreefile needed for snapshot creation.
- Add special handling of snapshot files:
Snapshots may not be opened for writing and the attributes are read-only.
Use the mtime as the time this snapshot was taken.
Deny mtime updates for snapshot files.
- Add function transferlockers to transfer any waiting processes from
one lock to another.
- Add vfsop VFS_SNAPSHOT to take a snapshot and make it accessible through
a vnode.
- Add snapshot support to ls, fsck_ffs and dump.

Welcome to 2.0F.

Approved by: Jason R. Thorpe <thorpej@netbsd.org>

branches: 1.2.6;
Add support for the Apple UFS variation on ffs
This is the bulk of PR #17345

The general approach is to use a run time deteriminable value
for DIRBLKSIZ. Additional allowances are included for using
MAXSYMLINKLEN with FS_42INODEFMT and a shift in the cylinder group
cluster summary count array. Support is added for managing
the Apple UFS volume label.

branches: 1.1.6; 1.1.8;
Cleanup how file system configuration information is declared, grouping
related information together, with the file system code itself.

This is just low-hanging fruit -- more to come.