Overhaul of the EVFILT_VNODE kevent(2) filter:

- Centralize vnode kevent handling in the VOP_*() wrappers, rather than
forcing each individual file system to deal with it (except VOP_RENAME(),
because VOP_RENAME() is a mess and we currently have 2 different ways
of handling it; at least it's reasonably well-centralized in the "new"
way).
- Add support for NOTE_OPEN, NOTE_CLOSE, NOTE_CLOSE_WRITE, and NOTE_READ,
compatible with the same events in FreeBSD.
- Track which kevent notifications clients are interested in receiving
to avoid doing work for events no one cares about (avoiding, e.g.
taking locks and traversing the klist to send a NOTE_WRITE when
someone is merely watching for a file to be deleted, for example).

In support of the above:

- Add support in vnode_if.sh for specifying PRE- and POST-op handlers,
to be invoked before and after vop_pre() and vop_post(), respectively.
Basic idea from FreeBSD, but implemented differently.
- Add support in vnode_if.sh for specifying CONTEXT fields in the
vop_*_args structures. These context fields are used to convey information
between the file system VOP function and the VOP wrapper, but do not
occupy an argument slot in the VOP_*() call itself. These context fields
are initialized and subsequently interpreted by PRE- and POST-op handlers.
- Version VOP_REMOVE(), uses the a context field for the file system to report
back the resulting link count of the target vnode. Return this in tmpfs,
udf, nfs, chfs, ext2fs, lfs, and ufs.

NetBSD 9.99.92.

Round of uvm.h cleanup.

The poorly named uvm.h is generally supposed to be for uvm-internal
users only.

- Narrow it to files that actually need it -- mostly files that need
to query whether curlwp is the pagedaemon, which should maybe be
exposed by an external header.

- Use uvm_extern.h where feasible and uvm_*.h for things not exposed
by it. We should split up uvm_extern.h but this will serve for now
to reduce the uvm.h dependencies.

- Use uvm_stat.h and #ifdef UVMHIST uvm.h for files that use
UVMHIST(ubchist), since ubchist is declared in uvm.h but the
reference evaporates if UVMHIST is not defined, so we reduce header
file dependencies.

- Make uvm_device.h and uvm_swap.h independently includable while
here.

ok chs@

Call lfs_orphan in lfs_rename while we're still in the dirop.

branches: 1.22.6; 1.22.10; 1.22.12;
Rename i_flag to i_state.

The similarity to i_flags has previously caused errors.

branches: 1.21.10;
One more batch of already-synced ufs changes:

ufs_extern.h 1.79 is equivalent to ulfs_extern.h 1.14
ufsmount.h 1.43 is (roughly) equivalent to lfs_extern.h 1.102
ufs_inode.c 1.94 does not apply to lfs
ufs_inode.c 1.95 does not apply to lfs either
ufs_readwrite.c 1.108 is equivalent to ulfs_readwrite.c 1.8
ufs_readwrite.c 1.109 is equivalent to ulfs_readwrite.c 1.9
ufs_readwrite.c 1.110 is equivalent to ulfs_readwrite.c 1.10
ufs_readwrite.c 1.111 does not apply to lfs
ufs_readwrite.c 1.112 is equivalent to ulfs_readwrite.c 1.11
ufs_readwrite.c 1.113 is equivalent to ulfs_readwrite.c 1.13
ufs_readwrite.c 1.114 is equivalent to ulfs_readwrite.c 1.14
ufs_readwrite.c 1.115 is equivalent to ulfs_readwrite.c 1.15
ufs_readwrite.c 1.116-1.118 does not apply to lfs
ufs_readwrite.c 1.119-1.120 are equivalent to ulfs_readwrite.c 1.16
ufs_rename.c 1.12 is equivalent to lfs_rename.c 1.8
ufs_vnops.c 1.226 is equivalent to ulfs_vnops.c 1.22 and lfs_vnops.c 1.270
ufs_vnops.c 1.227 is equivalent to ulfs_vnops.c 1.23
ufs_vnops.c 1.228-1.229 are equivalent to ulfs_vnops.c 1.24
ufs_vnops.c 1.230 is equivalent to ulfs_vnops.c 1.25 and lfs_vnops.c 1.271
ufs_vnops.c 1.231 originated in lfs
ufs_vnops.c 1.232 does not apply to lfs

fix typo in previous

Merge ufs_rename.c 1.11: ufs_gro_genealogy: use vcache_get() to lookup DOTDOT.

More already-merged or equivalent changes:

ufs_dirhash.c 1.36 corresponds to ulfs_dirhash.c 1.8
ufs_extattr.c 1.43 corresponds to ulfs_extattr.c 1.7
ufs_lookup.c 1.126 does not apply to lfs
ufs_lookup.c 1.127 we already have
ufs_lookup.c 1.128 does not apply to lfs
ufs_lookup.c 1.129 corresponds to ulfs_lookup.c 1.19
ufs_quota1.c 1.19 corresponds to ulfs_quota1.c 1.7
ufs_quota1.c 1.20 corresponds to ulfs_quota1.c 1.8
ufs_quota2.c 1.36 we have equivalent changes for
ufs_rename.c 1.9 corresponds to lfs_rename.c 1.5
ufs_rename.c 1.10 corresponds to lfs_rename.c 1.6
ufs_vnops.c 1.219 corresponds to lfs_vnops.c 1.260 and ulfs_vnops.c 1.19
ufs_vnops.c 1.220 corresponds to lfs_vnops.c 1.261 and ulfs_vnops.c 1.20
ufs_vnops.c 1.221 was superseded by later changes
ufs_vnops.c 1.222 got fixed independently in lfs

Mark ufs file versions we're already synced with.

Add 64-bit directory entry structures, and adjust accessors accordingly.

The LFS64 directory entry has a 64-bit inode number. This is stored as
two 32-bit values to avoid inducing 64-bit alignment requirements.

The exposed type for manipulating directory entries is now
LFS_DIRHEADER, following the same convention as e.g. IFILE and SEGUSE.
(But with LFS_ on it, because.)

Oops; LFS_DIRECTSIZ() is going to need the fs as an argument.

Also, it turns out that dirhash needs a compile-time-constant version
of LFS_DIRECTSIZ(LFS_MAXNAMLEN+1), independent of 64-vs-32, so create
LFS_MAXDIRENTRYSIZE for this. Sigh.

Clean up struct lfs_dirtemplate.

Pass around struct lfs_dirheader instead of struct lfs_direct.

Add an accessor function for directory names.

Kill off ulfs_makedirentry; just pass the data to ulfs_direnter instead.
For now, move one copy of the code that allocates and fills in a
temporary struct lfs_direct to the top of ulfs_direnter; but it should
go away shortly.

Add and use accessor functions for more of the directory entry fields.

Add new accessors for the d_type and d_namlen fields of struct lfs_direct.
Napalm the old byteswap access logic for these.

Disentangle buffer-cached I/O from page-cached I/O in UFS.

Page-cached I/O is used for regular files, and is initiated by VFS
users such as userland and NFS.

Buffer-cached I/O is used for directories and symlinks, and is issued
only internally by UFS.

New UFS routine ufs_bufio replaces vn_rdwr for internal use.
ufs_bufio is implemented by new UFS operations uo_bufrd/uo_bufwr,
which sit in ufs_readwrite.c alongside the VOP_READ/VOP_WRITE
implementations.

I preserved the code as much as possible and will leave further
simplification for future commits. I kept the ulfs_readwrite.c
copypasta close to ufs_readwrite.c in case we ever want to merge them
back; likewise ext2fs_readwrite.c.

No externally visible semantic change. All atf fs tests still pass.

branches: 1.7.2; 1.7.6; 1.7.8;
Remove the DIROP macros. They are evil, especially the CREATE ones.

This results in some duplicate logic in the creation vnops (symlink,
mknod, create, mkdir) but we will probably be able to factor it out in
a more sensible way later.

Now the creation vnops call getnewvnode explicitly instead of under
multiple layers of obscure gunk. Then we explicitly do lfs_set_dirop,
and afterwards lfs_unset_dirop.

branches: 1.6.2;
Move fstrans_start()/fstrans_done() into genfs_insane_rename() to protect
the complete rename operation like we do for all other vnode operations.

Quell a gcc 4.8 maybe-unitialized false positive

branches: 1.4.2;
Migrate the miscellaneous ulfs-level info from struct ulfsmount to
struct lfs.

Put them inside #ifdef _KERNEL there. They are not the only such
members, gross as that is. Unfortunately, moving struct lfs to
lfs_kernel.h does not work.

Remove the now-pointless ulfs ops macros.

branches: 1.2.2;
G/C unused pieces.

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

Round of uvm.h cleanup.

The poorly named uvm.h is generally supposed to be for uvm-internal
users only.

- Narrow it to files that actually need it -- mostly files that need
to query whether curlwp is the pagedaemon, which should maybe be
exposed by an external header.

- Use uvm_extern.h where feasible and uvm_*.h for things not exposed
by it. We should split up uvm_extern.h but this will serve for now
to reduce the uvm.h dependencies.

- Use uvm_stat.h and #ifdef UVMHIST uvm.h for files that use
UVMHIST(ubchist), since ubchist is declared in uvm.h but the
reference evaporates if UVMHIST is not defined, so we reduce header
file dependencies.

- Make uvm_device.h and uvm_swap.h independently includable while
here.

ok chs@

Call lfs_orphan in lfs_rename while we're still in the dirop.

branches: 1.22.6; 1.22.10; 1.22.12;
Rename i_flag to i_state.

The similarity to i_flags has previously caused errors.

branches: 1.21.10;
One more batch of already-synced ufs changes:

ufs_extern.h 1.79 is equivalent to ulfs_extern.h 1.14
ufsmount.h 1.43 is (roughly) equivalent to lfs_extern.h 1.102
ufs_inode.c 1.94 does not apply to lfs
ufs_inode.c 1.95 does not apply to lfs either
ufs_readwrite.c 1.108 is equivalent to ulfs_readwrite.c 1.8
ufs_readwrite.c 1.109 is equivalent to ulfs_readwrite.c 1.9
ufs_readwrite.c 1.110 is equivalent to ulfs_readwrite.c 1.10
ufs_readwrite.c 1.111 does not apply to lfs
ufs_readwrite.c 1.112 is equivalent to ulfs_readwrite.c 1.11
ufs_readwrite.c 1.113 is equivalent to ulfs_readwrite.c 1.13
ufs_readwrite.c 1.114 is equivalent to ulfs_readwrite.c 1.14
ufs_readwrite.c 1.115 is equivalent to ulfs_readwrite.c 1.15
ufs_readwrite.c 1.116-1.118 does not apply to lfs
ufs_readwrite.c 1.119-1.120 are equivalent to ulfs_readwrite.c 1.16
ufs_rename.c 1.12 is equivalent to lfs_rename.c 1.8
ufs_vnops.c 1.226 is equivalent to ulfs_vnops.c 1.22 and lfs_vnops.c 1.270
ufs_vnops.c 1.227 is equivalent to ulfs_vnops.c 1.23
ufs_vnops.c 1.228-1.229 are equivalent to ulfs_vnops.c 1.24
ufs_vnops.c 1.230 is equivalent to ulfs_vnops.c 1.25 and lfs_vnops.c 1.271
ufs_vnops.c 1.231 originated in lfs
ufs_vnops.c 1.232 does not apply to lfs

fix typo in previous

Merge ufs_rename.c 1.11: ufs_gro_genealogy: use vcache_get() to lookup DOTDOT.

More already-merged or equivalent changes:

ufs_dirhash.c 1.36 corresponds to ulfs_dirhash.c 1.8
ufs_extattr.c 1.43 corresponds to ulfs_extattr.c 1.7
ufs_lookup.c 1.126 does not apply to lfs
ufs_lookup.c 1.127 we already have
ufs_lookup.c 1.128 does not apply to lfs
ufs_lookup.c 1.129 corresponds to ulfs_lookup.c 1.19
ufs_quota1.c 1.19 corresponds to ulfs_quota1.c 1.7
ufs_quota1.c 1.20 corresponds to ulfs_quota1.c 1.8
ufs_quota2.c 1.36 we have equivalent changes for
ufs_rename.c 1.9 corresponds to lfs_rename.c 1.5
ufs_rename.c 1.10 corresponds to lfs_rename.c 1.6
ufs_vnops.c 1.219 corresponds to lfs_vnops.c 1.260 and ulfs_vnops.c 1.19
ufs_vnops.c 1.220 corresponds to lfs_vnops.c 1.261 and ulfs_vnops.c 1.20
ufs_vnops.c 1.221 was superseded by later changes
ufs_vnops.c 1.222 got fixed independently in lfs

Mark ufs file versions we're already synced with.

Add 64-bit directory entry structures, and adjust accessors accordingly.

The LFS64 directory entry has a 64-bit inode number. This is stored as
two 32-bit values to avoid inducing 64-bit alignment requirements.

The exposed type for manipulating directory entries is now
LFS_DIRHEADER, following the same convention as e.g. IFILE and SEGUSE.
(But with LFS_ on it, because.)

Oops; LFS_DIRECTSIZ() is going to need the fs as an argument.

Also, it turns out that dirhash needs a compile-time-constant version
of LFS_DIRECTSIZ(LFS_MAXNAMLEN+1), independent of 64-vs-32, so create
LFS_MAXDIRENTRYSIZE for this. Sigh.

Clean up struct lfs_dirtemplate.

Pass around struct lfs_dirheader instead of struct lfs_direct.

Add an accessor function for directory names.

Kill off ulfs_makedirentry; just pass the data to ulfs_direnter instead.
For now, move one copy of the code that allocates and fills in a
temporary struct lfs_direct to the top of ulfs_direnter; but it should
go away shortly.

Add and use accessor functions for more of the directory entry fields.

Add new accessors for the d_type and d_namlen fields of struct lfs_direct.
Napalm the old byteswap access logic for these.

Disentangle buffer-cached I/O from page-cached I/O in UFS.

Page-cached I/O is used for regular files, and is initiated by VFS
users such as userland and NFS.

Buffer-cached I/O is used for directories and symlinks, and is issued
only internally by UFS.

New UFS routine ufs_bufio replaces vn_rdwr for internal use.
ufs_bufio is implemented by new UFS operations uo_bufrd/uo_bufwr,
which sit in ufs_readwrite.c alongside the VOP_READ/VOP_WRITE
implementations.

I preserved the code as much as possible and will leave further
simplification for future commits. I kept the ulfs_readwrite.c
copypasta close to ufs_readwrite.c in case we ever want to merge them
back; likewise ext2fs_readwrite.c.

No externally visible semantic change. All atf fs tests still pass.

branches: 1.7.2; 1.7.6; 1.7.8;
Remove the DIROP macros. They are evil, especially the CREATE ones.

This results in some duplicate logic in the creation vnops (symlink,
mknod, create, mkdir) but we will probably be able to factor it out in
a more sensible way later.

Now the creation vnops call getnewvnode explicitly instead of under
multiple layers of obscure gunk. Then we explicitly do lfs_set_dirop,
and afterwards lfs_unset_dirop.

branches: 1.6.2;
Move fstrans_start()/fstrans_done() into genfs_insane_rename() to protect
the complete rename operation like we do for all other vnode operations.

Quell a gcc 4.8 maybe-unitialized false positive

branches: 1.4.2;
Migrate the miscellaneous ulfs-level info from struct ulfsmount to
struct lfs.

Put them inside #ifdef _KERNEL there. They are not the only such
members, gross as that is. Unfortunately, moving struct lfs to
lfs_kernel.h does not work.

Remove the now-pointless ulfs ops macros.

branches: 1.2.2;
G/C unused pieces.

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

Call lfs_orphan in lfs_rename while we're still in the dirop.

Rename i_flag to i_state.

The similarity to i_flags has previously caused errors.

branches: 1.21.10;
One more batch of already-synced ufs changes:

ufs_extern.h 1.79 is equivalent to ulfs_extern.h 1.14
ufsmount.h 1.43 is (roughly) equivalent to lfs_extern.h 1.102
ufs_inode.c 1.94 does not apply to lfs
ufs_inode.c 1.95 does not apply to lfs either
ufs_readwrite.c 1.108 is equivalent to ulfs_readwrite.c 1.8
ufs_readwrite.c 1.109 is equivalent to ulfs_readwrite.c 1.9
ufs_readwrite.c 1.110 is equivalent to ulfs_readwrite.c 1.10
ufs_readwrite.c 1.111 does not apply to lfs
ufs_readwrite.c 1.112 is equivalent to ulfs_readwrite.c 1.11
ufs_readwrite.c 1.113 is equivalent to ulfs_readwrite.c 1.13
ufs_readwrite.c 1.114 is equivalent to ulfs_readwrite.c 1.14
ufs_readwrite.c 1.115 is equivalent to ulfs_readwrite.c 1.15
ufs_readwrite.c 1.116-1.118 does not apply to lfs
ufs_readwrite.c 1.119-1.120 are equivalent to ulfs_readwrite.c 1.16
ufs_rename.c 1.12 is equivalent to lfs_rename.c 1.8
ufs_vnops.c 1.226 is equivalent to ulfs_vnops.c 1.22 and lfs_vnops.c 1.270
ufs_vnops.c 1.227 is equivalent to ulfs_vnops.c 1.23
ufs_vnops.c 1.228-1.229 are equivalent to ulfs_vnops.c 1.24
ufs_vnops.c 1.230 is equivalent to ulfs_vnops.c 1.25 and lfs_vnops.c 1.271
ufs_vnops.c 1.231 originated in lfs
ufs_vnops.c 1.232 does not apply to lfs

fix typo in previous

Merge ufs_rename.c 1.11: ufs_gro_genealogy: use vcache_get() to lookup DOTDOT.

More already-merged or equivalent changes:

ufs_dirhash.c 1.36 corresponds to ulfs_dirhash.c 1.8
ufs_extattr.c 1.43 corresponds to ulfs_extattr.c 1.7
ufs_lookup.c 1.126 does not apply to lfs
ufs_lookup.c 1.127 we already have
ufs_lookup.c 1.128 does not apply to lfs
ufs_lookup.c 1.129 corresponds to ulfs_lookup.c 1.19
ufs_quota1.c 1.19 corresponds to ulfs_quota1.c 1.7
ufs_quota1.c 1.20 corresponds to ulfs_quota1.c 1.8
ufs_quota2.c 1.36 we have equivalent changes for
ufs_rename.c 1.9 corresponds to lfs_rename.c 1.5
ufs_rename.c 1.10 corresponds to lfs_rename.c 1.6
ufs_vnops.c 1.219 corresponds to lfs_vnops.c 1.260 and ulfs_vnops.c 1.19
ufs_vnops.c 1.220 corresponds to lfs_vnops.c 1.261 and ulfs_vnops.c 1.20
ufs_vnops.c 1.221 was superseded by later changes
ufs_vnops.c 1.222 got fixed independently in lfs

Mark ufs file versions we're already synced with.

Add 64-bit directory entry structures, and adjust accessors accordingly.

The LFS64 directory entry has a 64-bit inode number. This is stored as
two 32-bit values to avoid inducing 64-bit alignment requirements.

The exposed type for manipulating directory entries is now
LFS_DIRHEADER, following the same convention as e.g. IFILE and SEGUSE.
(But with LFS_ on it, because.)

Oops; LFS_DIRECTSIZ() is going to need the fs as an argument.

Also, it turns out that dirhash needs a compile-time-constant version
of LFS_DIRECTSIZ(LFS_MAXNAMLEN+1), independent of 64-vs-32, so create
LFS_MAXDIRENTRYSIZE for this. Sigh.

Clean up struct lfs_dirtemplate.

Pass around struct lfs_dirheader instead of struct lfs_direct.

Add an accessor function for directory names.

Kill off ulfs_makedirentry; just pass the data to ulfs_direnter instead.
For now, move one copy of the code that allocates and fills in a
temporary struct lfs_direct to the top of ulfs_direnter; but it should
go away shortly.

Add and use accessor functions for more of the directory entry fields.

Add new accessors for the d_type and d_namlen fields of struct lfs_direct.
Napalm the old byteswap access logic for these.

Disentangle buffer-cached I/O from page-cached I/O in UFS.

Page-cached I/O is used for regular files, and is initiated by VFS
users such as userland and NFS.

Buffer-cached I/O is used for directories and symlinks, and is issued
only internally by UFS.

New UFS routine ufs_bufio replaces vn_rdwr for internal use.
ufs_bufio is implemented by new UFS operations uo_bufrd/uo_bufwr,
which sit in ufs_readwrite.c alongside the VOP_READ/VOP_WRITE
implementations.

I preserved the code as much as possible and will leave further
simplification for future commits. I kept the ulfs_readwrite.c
copypasta close to ufs_readwrite.c in case we ever want to merge them
back; likewise ext2fs_readwrite.c.

No externally visible semantic change. All atf fs tests still pass.

branches: 1.7.2; 1.7.6; 1.7.8;
Remove the DIROP macros. They are evil, especially the CREATE ones.

This results in some duplicate logic in the creation vnops (symlink,
mknod, create, mkdir) but we will probably be able to factor it out in
a more sensible way later.

Now the creation vnops call getnewvnode explicitly instead of under
multiple layers of obscure gunk. Then we explicitly do lfs_set_dirop,
and afterwards lfs_unset_dirop.

branches: 1.6.2;
Move fstrans_start()/fstrans_done() into genfs_insane_rename() to protect
the complete rename operation like we do for all other vnode operations.

Quell a gcc 4.8 maybe-unitialized false positive

branches: 1.4.2;
Migrate the miscellaneous ulfs-level info from struct ulfsmount to
struct lfs.

Put them inside #ifdef _KERNEL there. They are not the only such
members, gross as that is. Unfortunately, moving struct lfs to
lfs_kernel.h does not work.

Remove the now-pointless ulfs ops macros.

branches: 1.2.2;
G/C unused pieces.

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

Rename i_flag to i_state.

The similarity to i_flags has previously caused errors.

One more batch of already-synced ufs changes:

ufs_extern.h 1.79 is equivalent to ulfs_extern.h 1.14
ufsmount.h 1.43 is (roughly) equivalent to lfs_extern.h 1.102
ufs_inode.c 1.94 does not apply to lfs
ufs_inode.c 1.95 does not apply to lfs either
ufs_readwrite.c 1.108 is equivalent to ulfs_readwrite.c 1.8
ufs_readwrite.c 1.109 is equivalent to ulfs_readwrite.c 1.9
ufs_readwrite.c 1.110 is equivalent to ulfs_readwrite.c 1.10
ufs_readwrite.c 1.111 does not apply to lfs
ufs_readwrite.c 1.112 is equivalent to ulfs_readwrite.c 1.11
ufs_readwrite.c 1.113 is equivalent to ulfs_readwrite.c 1.13
ufs_readwrite.c 1.114 is equivalent to ulfs_readwrite.c 1.14
ufs_readwrite.c 1.115 is equivalent to ulfs_readwrite.c 1.15
ufs_readwrite.c 1.116-1.118 does not apply to lfs
ufs_readwrite.c 1.119-1.120 are equivalent to ulfs_readwrite.c 1.16
ufs_rename.c 1.12 is equivalent to lfs_rename.c 1.8
ufs_vnops.c 1.226 is equivalent to ulfs_vnops.c 1.22 and lfs_vnops.c 1.270
ufs_vnops.c 1.227 is equivalent to ulfs_vnops.c 1.23
ufs_vnops.c 1.228-1.229 are equivalent to ulfs_vnops.c 1.24
ufs_vnops.c 1.230 is equivalent to ulfs_vnops.c 1.25 and lfs_vnops.c 1.271
ufs_vnops.c 1.231 originated in lfs
ufs_vnops.c 1.232 does not apply to lfs

fix typo in previous

Merge ufs_rename.c 1.11: ufs_gro_genealogy: use vcache_get() to lookup DOTDOT.

More already-merged or equivalent changes:

ufs_dirhash.c 1.36 corresponds to ulfs_dirhash.c 1.8
ufs_extattr.c 1.43 corresponds to ulfs_extattr.c 1.7
ufs_lookup.c 1.126 does not apply to lfs
ufs_lookup.c 1.127 we already have
ufs_lookup.c 1.128 does not apply to lfs
ufs_lookup.c 1.129 corresponds to ulfs_lookup.c 1.19
ufs_quota1.c 1.19 corresponds to ulfs_quota1.c 1.7
ufs_quota1.c 1.20 corresponds to ulfs_quota1.c 1.8
ufs_quota2.c 1.36 we have equivalent changes for
ufs_rename.c 1.9 corresponds to lfs_rename.c 1.5
ufs_rename.c 1.10 corresponds to lfs_rename.c 1.6
ufs_vnops.c 1.219 corresponds to lfs_vnops.c 1.260 and ulfs_vnops.c 1.19
ufs_vnops.c 1.220 corresponds to lfs_vnops.c 1.261 and ulfs_vnops.c 1.20
ufs_vnops.c 1.221 was superseded by later changes
ufs_vnops.c 1.222 got fixed independently in lfs

Mark ufs file versions we're already synced with.

Add 64-bit directory entry structures, and adjust accessors accordingly.

The LFS64 directory entry has a 64-bit inode number. This is stored as
two 32-bit values to avoid inducing 64-bit alignment requirements.

The exposed type for manipulating directory entries is now
LFS_DIRHEADER, following the same convention as e.g. IFILE and SEGUSE.
(But with LFS_ on it, because.)

Oops; LFS_DIRECTSIZ() is going to need the fs as an argument.

Also, it turns out that dirhash needs a compile-time-constant version
of LFS_DIRECTSIZ(LFS_MAXNAMLEN+1), independent of 64-vs-32, so create
LFS_MAXDIRENTRYSIZE for this. Sigh.

Clean up struct lfs_dirtemplate.

Pass around struct lfs_dirheader instead of struct lfs_direct.

Add an accessor function for directory names.

Kill off ulfs_makedirentry; just pass the data to ulfs_direnter instead.
For now, move one copy of the code that allocates and fills in a
temporary struct lfs_direct to the top of ulfs_direnter; but it should
go away shortly.

Add and use accessor functions for more of the directory entry fields.

Add new accessors for the d_type and d_namlen fields of struct lfs_direct.
Napalm the old byteswap access logic for these.

Disentangle buffer-cached I/O from page-cached I/O in UFS.

Page-cached I/O is used for regular files, and is initiated by VFS
users such as userland and NFS.

Buffer-cached I/O is used for directories and symlinks, and is issued
only internally by UFS.

New UFS routine ufs_bufio replaces vn_rdwr for internal use.
ufs_bufio is implemented by new UFS operations uo_bufrd/uo_bufwr,
which sit in ufs_readwrite.c alongside the VOP_READ/VOP_WRITE
implementations.

I preserved the code as much as possible and will leave further
simplification for future commits. I kept the ulfs_readwrite.c
copypasta close to ufs_readwrite.c in case we ever want to merge them
back; likewise ext2fs_readwrite.c.

No externally visible semantic change. All atf fs tests still pass.

branches: 1.7.2; 1.7.6; 1.7.8;
Remove the DIROP macros. They are evil, especially the CREATE ones.

This results in some duplicate logic in the creation vnops (symlink,
mknod, create, mkdir) but we will probably be able to factor it out in
a more sensible way later.

Now the creation vnops call getnewvnode explicitly instead of under
multiple layers of obscure gunk. Then we explicitly do lfs_set_dirop,
and afterwards lfs_unset_dirop.

branches: 1.6.2;
Move fstrans_start()/fstrans_done() into genfs_insane_rename() to protect
the complete rename operation like we do for all other vnode operations.

Quell a gcc 4.8 maybe-unitialized false positive

branches: 1.4.2;
Migrate the miscellaneous ulfs-level info from struct ulfsmount to
struct lfs.

Put them inside #ifdef _KERNEL there. They are not the only such
members, gross as that is. Unfortunately, moving struct lfs to
lfs_kernel.h does not work.

Remove the now-pointless ulfs ops macros.

branches: 1.2.2;
G/C unused pieces.

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

One more batch of already-synced ufs changes:

ufs_extern.h 1.79 is equivalent to ulfs_extern.h 1.14
ufsmount.h 1.43 is (roughly) equivalent to lfs_extern.h 1.102
ufs_inode.c 1.94 does not apply to lfs
ufs_inode.c 1.95 does not apply to lfs either
ufs_readwrite.c 1.108 is equivalent to ulfs_readwrite.c 1.8
ufs_readwrite.c 1.109 is equivalent to ulfs_readwrite.c 1.9
ufs_readwrite.c 1.110 is equivalent to ulfs_readwrite.c 1.10
ufs_readwrite.c 1.111 does not apply to lfs
ufs_readwrite.c 1.112 is equivalent to ulfs_readwrite.c 1.11
ufs_readwrite.c 1.113 is equivalent to ulfs_readwrite.c 1.13
ufs_readwrite.c 1.114 is equivalent to ulfs_readwrite.c 1.14
ufs_readwrite.c 1.115 is equivalent to ulfs_readwrite.c 1.15
ufs_readwrite.c 1.116-1.118 does not apply to lfs
ufs_readwrite.c 1.119-1.120 are equivalent to ulfs_readwrite.c 1.16
ufs_rename.c 1.12 is equivalent to lfs_rename.c 1.8
ufs_vnops.c 1.226 is equivalent to ulfs_vnops.c 1.22 and lfs_vnops.c 1.270
ufs_vnops.c 1.227 is equivalent to ulfs_vnops.c 1.23
ufs_vnops.c 1.228-1.229 are equivalent to ulfs_vnops.c 1.24
ufs_vnops.c 1.230 is equivalent to ulfs_vnops.c 1.25 and lfs_vnops.c 1.271
ufs_vnops.c 1.231 originated in lfs
ufs_vnops.c 1.232 does not apply to lfs

fix typo in previous

Merge ufs_rename.c 1.11: ufs_gro_genealogy: use vcache_get() to lookup DOTDOT.

More already-merged or equivalent changes:

ufs_dirhash.c 1.36 corresponds to ulfs_dirhash.c 1.8
ufs_extattr.c 1.43 corresponds to ulfs_extattr.c 1.7
ufs_lookup.c 1.126 does not apply to lfs
ufs_lookup.c 1.127 we already have
ufs_lookup.c 1.128 does not apply to lfs
ufs_lookup.c 1.129 corresponds to ulfs_lookup.c 1.19
ufs_quota1.c 1.19 corresponds to ulfs_quota1.c 1.7
ufs_quota1.c 1.20 corresponds to ulfs_quota1.c 1.8
ufs_quota2.c 1.36 we have equivalent changes for
ufs_rename.c 1.9 corresponds to lfs_rename.c 1.5
ufs_rename.c 1.10 corresponds to lfs_rename.c 1.6
ufs_vnops.c 1.219 corresponds to lfs_vnops.c 1.260 and ulfs_vnops.c 1.19
ufs_vnops.c 1.220 corresponds to lfs_vnops.c 1.261 and ulfs_vnops.c 1.20
ufs_vnops.c 1.221 was superseded by later changes
ufs_vnops.c 1.222 got fixed independently in lfs

Mark ufs file versions we're already synced with.

Add 64-bit directory entry structures, and adjust accessors accordingly.

The LFS64 directory entry has a 64-bit inode number. This is stored as
two 32-bit values to avoid inducing 64-bit alignment requirements.

The exposed type for manipulating directory entries is now
LFS_DIRHEADER, following the same convention as e.g. IFILE and SEGUSE.
(But with LFS_ on it, because.)

Oops; LFS_DIRECTSIZ() is going to need the fs as an argument.

Also, it turns out that dirhash needs a compile-time-constant version
of LFS_DIRECTSIZ(LFS_MAXNAMLEN+1), independent of 64-vs-32, so create
LFS_MAXDIRENTRYSIZE for this. Sigh.

Clean up struct lfs_dirtemplate.

Pass around struct lfs_dirheader instead of struct lfs_direct.

Add an accessor function for directory names.

Kill off ulfs_makedirentry; just pass the data to ulfs_direnter instead.
For now, move one copy of the code that allocates and fills in a
temporary struct lfs_direct to the top of ulfs_direnter; but it should
go away shortly.

Add and use accessor functions for more of the directory entry fields.

Add new accessors for the d_type and d_namlen fields of struct lfs_direct.
Napalm the old byteswap access logic for these.

Disentangle buffer-cached I/O from page-cached I/O in UFS.

Page-cached I/O is used for regular files, and is initiated by VFS
users such as userland and NFS.

Buffer-cached I/O is used for directories and symlinks, and is issued
only internally by UFS.

New UFS routine ufs_bufio replaces vn_rdwr for internal use.
ufs_bufio is implemented by new UFS operations uo_bufrd/uo_bufwr,
which sit in ufs_readwrite.c alongside the VOP_READ/VOP_WRITE
implementations.

I preserved the code as much as possible and will leave further
simplification for future commits. I kept the ulfs_readwrite.c
copypasta close to ufs_readwrite.c in case we ever want to merge them
back; likewise ext2fs_readwrite.c.

No externally visible semantic change. All atf fs tests still pass.

branches: 1.7.2; 1.7.6; 1.7.8;
Remove the DIROP macros. They are evil, especially the CREATE ones.

This results in some duplicate logic in the creation vnops (symlink,
mknod, create, mkdir) but we will probably be able to factor it out in
a more sensible way later.

Now the creation vnops call getnewvnode explicitly instead of under
multiple layers of obscure gunk. Then we explicitly do lfs_set_dirop,
and afterwards lfs_unset_dirop.

branches: 1.6.2;
Move fstrans_start()/fstrans_done() into genfs_insane_rename() to protect
the complete rename operation like we do for all other vnode operations.

Quell a gcc 4.8 maybe-unitialized false positive

branches: 1.4.2;
Migrate the miscellaneous ulfs-level info from struct ulfsmount to
struct lfs.

Put them inside #ifdef _KERNEL there. They are not the only such
members, gross as that is. Unfortunately, moving struct lfs to
lfs_kernel.h does not work.

Remove the now-pointless ulfs ops macros.

branches: 1.2.2;
G/C unused pieces.

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