4b452509 vmaffione Dec. 21, 2018, 1:56 p.m.
Changelist:
    - General reformatting
    - Fix packet duplication in cons(). Whenever cons() reached the
      burst limit it would send all pending packets without advancing
      head. This caused the last injected packet to be sent again in
      the next round.
    - Fix full-speed transmissions after first loop.

MFC after:	3 days
cgit ViewVC
77a2baf5 vmaffione Dec. 21, 2018, 11:50 a.m.
This code validates the netmap buf_size against the interface MTU
and maximum descriptor size, to make sure the values are consistent.
Moving this functionality to its own function is needed because this
function is also called by Linux-specific code.

MFC after:	3 days
cgit ViewVC
c52382bd vmaffione Dec. 21, 2018, 11:32 a.m.
a5178bca ae Dec. 21, 2018, 10:41 a.m.
PR:		234237
MFC after:	1 week
cgit ViewVC
9e5ed859 bde Dec. 21, 2018, 8:15 a.m.
implement not double-caching for reads from vnode-backed md devices.
Use VOP_ADVISE() similarly instead of !IO_DIRECT unsimilarly for writes.
Add a "cache" option to mdconfig to allow changing the default of not
caching.

This depends on a recent commit to fix VOP_ADVISE().  A previous version
had optimizations for sequential i/o's (merge the i/o's and only uncache
for discontiguous i/o's and for full blocks), but optimizations and
knowledge of block boundaries belong in VOP_ADVISE().  Read-ahead should
also be handled better, by supporting it in md and discarding it in
VOP_ADVISE().

POSIX_FADV_DONTNEED is ignored by zfs, but so is IO_DIRECT.

POSIX_FADV_DONTNEED works better than IO_DIRECT if it is not ignored,
since it only discards from the buffer cache immediately, while
IO_DIRECT also discards from the page cache immediately.

IO_DIRECT was not used for writes since it was claimed to be too slow,
but most of the slowness for writes is from doing them synchronously by
default.  Non-synchronous writes still deadlock in many cases.

IO_DIRECT only has a special implementation for ffs reads with DIRECTIO
configured.  Otherwise, if it is not ignored than it uses the buffer and
page caches normally except for discarding everything after each i/o,
and then it has much the same overheads as POSIX_FADV_DONTNEED.  The
overheads for reading with ffs and DIRECTIO were similar in tests of md.

Reviewed by:	kib
cgit ViewVC
e6f6d885 bde Dec. 21, 2018, 6:38 a.m.
Reviewed by:	kib
cgit ViewVC
2c0434ac bde Dec. 21, 2018, 4:57 a.m.
POSIX_FADV_DONTNEED).  The most broken case was for applications that
advise for the whole file and then do block-aligned i/o's 1 block at
a time.  Then advice is sent to VOP_ADVISE() 1 block at a time, but
in vop_stdadvise() the 1-block advice was turned into 0-block advice
for the buffer cache part.

The bugs were caused partly by callers representing the region as
(a_start, a_end), where a_end is actually the maximum, and everything
else representing the region as (start, end) where 'end' is actually
the end (1 after the maximum).  The maximum a_end must be rounded up,
but was rounded down.  Also, rounding to page boundaries was inconsistent.

The bugs and fixes have no effect for zfs and other file systems that
don't use the buffer cache or the page cache.  Most or all file systems
currently use the default VOP_FADVISE(), but it finds a null buffer cache
and a null page cache for file systems that don't use normal methods.

Reviewed by:	kib
cgit ViewVC
13c31c29 mckusick Dec. 21, 2018, 1:09 a.m.
be called before VFS_ROOT() is called. Move the call for VFS_STATFS()
so that it is done after VFS_MOUNT(), but before VFS_ROOT().
This change actually improves the robustness of the mount system
call because it returns an error rather than failing silently
when VFS_STATFS() returns failure.

Reported by:  Rebecca Cran <rebecca@bluestop.org>
Sponsored by: Netflix
cgit ViewVC
ad025209 np Dec. 20, 2018, 10:39 p.m.
This information is readily available elsewhere.

Sponsored by:	Chelsio Communications
cgit ViewVC
6bb03465 np Dec. 20, 2018, 10:31 p.m.
d493fe42 rmacklem Dec. 20, 2018, 10:26 p.m.
23114c6c rmacklem Dec. 20, 2018, 10:21 p.m.
When the NFSv4 server was coded, I believed that the specification authors
did not want NFSv4 servers to require a client to use a reserved port#.
However, recently it has been noted that the Linux NFSv4 server does support
a check for a reserved port#.
Since both the FreeBSD and Linux NFSv4 clients use a reserved port# by
default, enabling vfs.nfsd.nfs_privport to require a reserved port# for
NFSv4 the same as it does for NFSv2, 3 seems reasonable.
The only case where this could cause a POLA violation is a FreeBSD NFSv4
server with vfs.nfsd.nfs_privport set, but with NFSv4 clients doing mounts
without using a reserved port# (< 1024).

Tested by:	chaz.newton58@gmail.com
PR:		234106
MFC after:	1 week
cgit ViewVC
0c3bbec3 cem Dec. 20, 2018, 8:55 p.m.
Move static variable definition (cdevsw) to a more conventional location
(the C file it is used in), rather than a header.

This fixes the GCC warning, -Wunused-variable ("defined but not used") when
the tpm20.h header is included in files other than tpm20.c (e.g.,
tpm_tis.c).

X-MFC-with:	r342084
Sponsored by:	Dell EMC Isilon
cgit ViewVC
9877f735 np Dec. 20, 2018, 8:34 p.m.
settings on initialization.

Sponsored by:	Chelsio Communications
cgit ViewVC
db8b5613 bcran Dec. 20, 2018, 7:39 p.m.
Currently, the installer uses pre-created 800KB FAT12 filesystems that
it dd's onto the ESP partition.
This changeset improves that by having the installer generate a FAT32
filesystem directly onto the ESP using newfs_msdos and then copying
loader.efi into /EFI/freebsd.
For live installs it then runs efibootmgr to add a FreeBSD boot entry
in the BIOS.

Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D17947
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