8249 NFSv4 race condition in delegations/open

refs #3415

nfs4_frlock() never asks server in F_GETLK case

refs #4379

(cherry picked from commit 10c8a5abfcbdb101ad670d8dec1bf728a94d70cf)

11675 NFSv4 client: Exclusive create should close the file after setattr failure
Reviewed by: Andy Fiddaman <omnios@citrus-it.co.uk>
Reviewed by: Toomas Soome <tsoome@me.com>
Reviewed by: Gordon Ross

11675 NFSv4 client: Exclusive create should close the file after setattr failure
Reviewed by: Andy Fiddaman <omnios@citrus-it.co.uk>
Reviewed by: Toomas Soome <tsoome@me.com>
Reviewed by: Gordon Ross <Gordon.W.Ross@gmail.com>
Reviewed by: Rich Lowe <richlowe@richlowe.net>
Reviewed by: Jan Schlien <illumos-bugs@jan-o-sch.net>
Approved by: Dan McDonald <danmcd@joyent.com>

refs #4030

(cherry picked from commit f6f90fc9dd670124e3bc26663dca6f65e2e6beaf)

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8040 NFSv4 client: 3-way deadlock between nfs4_bio(), nfs4_do_delegreturn(), and nfs4_flush_pages()
Reviewed by: Arne Jansen <arne@die-jansens.de>

refs #3182

(cherry picked from commit 7f56ef79e147

8040 NFSv4 client: 3-way deadlock between nfs4_bio(), nfs4_do_delegreturn(), and nfs4_flush_pages()
Reviewed by: Arne Jansen <arne@die-jansens.de>

refs #3182

(cherry picked from commit 7f56ef79e147255c699625694c97702335cac7c1)

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7721 Poor nfs4_frlock() performance for blocking locks
Reviewed by: Arne Jansen <arne@die-jansens.de>

refs #3314

(cherry picked from commit 50c466d9c807cb0b41199d4859f2b2a281c0a93f)

6911 nfs4: unexpected permission denied
Reviewed by: Simon Klinkert <simon.klinkert@gmail.com>

refs #3191

(cherry picked from commit 4526c1a75b3bdab802592cc2c97e78323086bf0f)

6785 nfs4_attr_cache deadlock

Avoid a deadlock with the r_serial thread waiting for
os_sync_lock in nfs4_get_otw_cred_by_osp() which might be
held by the nfs4close_otw thread. This thread would
wait

6785 nfs4_attr_cache deadlock

Avoid a deadlock with the r_serial thread waiting for
os_sync_lock in nfs4_get_otw_cred_by_osp() which might be
held by the nfs4close_otw thread. This thread would
wait in nfs4_attr_cache() for the completion of the r_serial
thread.

(cherry picked from commit 409f86d7f0d8d6117290b1436ed629f37289521b)

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7282 nlm_host leaks by nlm_host_findcreate() callers leads to hang in nlm_svc_stopping()

refs #3127

(cherry picked from commit 6edd6cf68c8107d5f882d1ec72a7897c98551df2)

further lint fixes

(cherry picked from commit 4ab1323af43e16c3c75773a928cdb4b8a38b6621)

2402 rnode.r_lkserlock is stupid (NFS4)

The problem is that nfs4_write wants a read lock on r_lkserlock, while
nfs4_frlock holds a write lock to it while it calls the server. So every
locking attemp

2402 rnode.r_lkserlock is stupid (NFS4)

The problem is that nfs4_write wants a read lock on r_lkserlock, while
nfs4_frlock holds a write lock to it while it calls the server. So every
locking attempt slows down the writes. If there are sufficiently many
processes trying to get the lock, the write() can completely starve, as
the implementation of nfs_rw_enter_sig prefers writers over readers.

(cherry picked from commit 346bb56b24009a447af70278afad51d50a52ea4b)

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nfs4_block_and_wait: code cleanup

(cherry picked from commit 46b536bc69c10dbf33009dc8f90356eaafc8db35)

nfs4 slow file locking: make it even faster and more tunable.

(cherry picked from commit 7853940f198ee7cadb2a6a004901b82972540a7e)

4827 nfs4: slow file locking
4837 NFSv4 client lock retry delay upper limit should be shorter

(cherry picked from commit 99ef4b75bc247bdd229cd0820fccabdb0602cf52)

5761 nfs4_prot.x should be updated for RFC 7531
Reviewed by: Gordon Ross <Gordon.W.Ross@gmail.com>
Reviewed by: Albert Lee <trisk@omniti.com>
Approved by: Robert Mustacchi <rm@joyent.com>

5382 pvn_getpages handles lengths <= PAGESIZE just fine
Reviewed by: Marcel Telka <marcel@telka.sk>
Approved by: Dan McDonald <danmcd@omniti.com>

5045 use atomic_{inc,dec}_* instead of atomic_add_*
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Garrett D'Amore <garrett@damore.org>
Approved by: Robert Mustacchi <rm@joyent.com>

3928 `tail -f ...` doesn't notice file truncation
3929 `man tail` doesn't mentioned "-F" option
3930 'tail -F ...' not resetting the offset of file rotation properly
3968 want FILE_TRUNC event for PO

3928 `tail -f ...` doesn't notice file truncation
3929 `man tail` doesn't mentioned "-F" option
3930 'tail -F ...' not resetting the offset of file rotation properly
3968 want FILE_TRUNC event for PORT_SOURCE_FILE
Reviewed by: Gordon Ross <gordon.ross@nexenta.com>
Approved by: Dan McDonald <danmcd@nexenta.com>

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3107 nfs4_getattr incorrectly checks bit masks
Reviewed by: Eric Schrock <eric.schrock@delphix.com>
Approved by: Richard Lowe <richlowe@richlowe.net>

6213799 VMODSORT support for NFS. AKA "close()/fsync() slow on clients with lots of memory and cached pages"

PSARC 2009/683 Reserved uid/gid for distinguishing unmappable users/groups in NFSv4 ACLs
6261858 ls(1) -l, getfacl(1), and setfacl(1) can return "Permission denied" due to "nobody" and ACLs

6232737 Client should support NFS4ERR_MOVED and fs_locations
6232743 Server should support NFS4ERR_MOVED and fs_locations
6891289 client panick mutex_vector_tryenter with some stress testing

6888022 NFSv4: grpid mount flag is not effective for files

6577647 NFS writes aren't interruptible if there are too many outstanding writes

6887666 mmap() on NFSv4 mounted filesystem can be not interruptible
6887889 Possible not interruptible hang in nfs4_write() with directio, append and intr

6833526 4-way hang in the NFSv4 client