Bring some updates from ufs_lookup to ext2fs.

r156418:

Don't set IN_CHANGE and IN_UPDATE on inodes for potentially suspended
file systems. This could cause deadlocks when creating snapshots.
(We c

Bring some updates from ufs_lookup to ext2fs.

r156418:

Don't set IN_CHANGE and IN_UPDATE on inodes for potentially suspended
file systems. This could cause deadlocks when creating snapshots.
(We can't do snapshots on ext2fs but it is useful to keep things in sync).

r183079:

- Only set i_offset in the parent directory's i-node during a lookup for
non-LOOKUP operations.
- Relax a VOP assertion for a DELETE lookup.

r187528:

Move the code from ufs_lookup.c used to do dotdot lookup, into
the helper function. It is supposed to be useful for any filesystem
that has to unlock dvp to walk to the ".." entry in lookup routine.

MFC after: 5 days

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Merge fresh head.

Turn DIAGNOSTICs to INVARIANTS in ext2fs.

This is done to be consistent with what other filesystems and
particularly ffs already does (see r173464).

MFC after: 5 days

sync from head

IFC @247348.

ext2fs: Use prototype declarations for function definitions

Submitted by: Christoph Mallon
MFC after: 2 weeks

Sync with HEAD.

ext2fs: move assignment where it is not dead.

Submitted by: Christoph Mallon
MFC after: 2 weeks

ext2fs: Remove useless rootino local variable.

Submitted by: Christoph Mallon
MFC after: 2 weeks

ext2fs: Correct off-by-one errors in FFTODT() and DDTOFT().

Submitted by: Christoph Mallon
MFC after: 2 weeks

ext2fs: Use nitems().

Submitted by: Christoph Mallon
MFC after: 2 weeks

ext2fs: general cleanup.

- Remove unused extern declarations in fs.h
- Correct comments in ext2_dir.h
- Several panic() messages showed wrong function names.
- Remove commented out stray line in ext

ext2fs: general cleanup.

- Remove unused extern declarations in fs.h
- Correct comments in ext2_dir.h
- Several panic() messages showed wrong function names.
- Remove commented out stray line in ext2_alloc.c.
- Remove the unused macro EXT2_BLOCK_SIZE_BITS() and the then
write-only member e2fs_blocksize_bits from struct m_ext2fs.
- Remove the unused macro EXT2_FIRST_INO() and the then write-only
member e2fs_first_inode from struct m_ext2fs.
- Remove EXT2_DESC_PER_BLOCK() and the member e2fs_descpb from
struct m_ext2fs.
- Remove the unused members e2fs_bmask, e2fs_dbpg and
e2fs_mount_opt from struct m_ext2fs
- Correct harmless off-by-one error for fspath in ext2_vfsops.c.
- Remove the unused and broken macros EXT2_ADDR_PER_BLOCK_BITS()
and EXT2_DESC_PER_BLOCK_BITS().
- Remove the !_KERNEL versions of the EXT2_* macros.

Submitted by: Christoph Mallon
MFC after: 2 weeks

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IFC @ r238370

IFC @ r236291.
Diff reductions to the enclosure driver made in r235911.

Merge head r233826 through r236168.

Fix a couple of issues that appear to be inherited from the old
8.x code:
- If the lock cannot be acquired immediately unlocks 'bar' vnode
and then locks both vnodes in order.
- wrong vnode type pani

Fix a couple of issues that appear to be inherited from the old
8.x code:
- If the lock cannot be acquired immediately unlocks 'bar' vnode
and then locks both vnodes in order.
- wrong vnode type panics from cache_enter_time after calls by
ext2_lookup.

The fix merges the fixes from ufs/ufs_lookup.c.

Submitted by: Mateusz Guzik
Approved by: jhb@ (mentor)
Reviewed by: kib@
MFC after: 1 week

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MFC

IFC @ r234692

sys/amd64/include/cpufunc.h
sys/amd64/include/fpu.h
sys/amd64/amd64/fpu.c
sys/amd64/vmm/vmm.c

- Add API to allow vmm FPU state init/save/restore.

FP stuff discussed with: kib

Fix found places where uio_resid is truncated to int.

Add the sysctl debug.iosize_max_clamp, enabled by default. Setting the
sysctl to zero allows to perform the SSIZE_MAX-sized i/o requests from
th

Fix found places where uio_resid is truncated to int.

Add the sysctl debug.iosize_max_clamp, enabled by default. Setting the
sysctl to zero allows to perform the SSIZE_MAX-sized i/o requests from
the usermode.

Discussed with: bde, das (previous versions)
MFC after: 1 month

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IFC @230489 (pending review).

IFC to head to catch up the bhyve branch

Approved by: grehan@

Style cleanups by jh@.
Fix a comment from the previous commit.
Use M_ZERO instead of bzero() in ext2_vfsops.c
Add include guards from PR.

PR: 162564
Approved by: jhb (mentor)
MFC after: 2 weeks

MFC

Merge comments about converting directory entries to be more direct and
concise.

Inspired by: Gleb Kurtsou

Sync with several changes in UFS/FFS:
- 77115: Implement support for O_DIRECT.
- 98425: Fix a performance issue introduced in 70131 that was causing
reads before writes even when writing full block

Sync with several changes in UFS/FFS:
- 77115: Implement support for O_DIRECT.
- 98425: Fix a performance issue introduced in 70131 that was causing
reads before writes even when writing full blocks.
- 98658: Rename the BALLOC flags from B_* to BA_* to avoid confusion with
the struct buf B_ flags.
- 100344: Merge the BA_ and IO_ flags so so that they may both be used in
the same flags word. This merger is possible by assigning the IO_ flags
to the low sixteen bits and the BA_ flags the high sixteen bits.
- 105422: Fix a file-rewrite performance case.
- 129545: Implement IO_INVAL in VOP_WRITE() by marking the buffer as
"no cache".
- Readd the DOINGASYNC() macro and use it to control asynchronous writes.
Change i-node updates to honor DOINGASYNC() instead of always being
synchronous.
- Use a PRIV_VFS_RETAINSUGID check instead of checking cr_uid against 0
directly when deciding whether or not to clear suid and sgid bits.

Submitted by: Pedro F. Giffuni giffunip at yahoo

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