WIP: use SPL facilities to determine how much RAM to free.
WIP: Add missing cache reclaim function from illumos.
WIP: Have ARC provide a stronger reaction to downward changes in
zfs.arc_max. Dissapointing arc_used appears small at all times
so this does not really work.
WIP: cleanups, remove incompatible kmem flags, replace with "correct" alternates.
WIP: Disabled compilation of AVL in ZFS, use the SPL one instead.
WIP: convert linux vmem_alloc/free calls to kmem_ equivs. vmem on linux has a completely different meaning than vmem on illumos.
Retire HAVE_IOCTL_* configure checks

The HAVE_IOCTL_* configure checks were originally added for
compatibility with an ancient version of glibc.  This support
and additional complexity is no longer needed and is therefore
being removed.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Turbo Fredriksson <turbo@bayour.com>
Closes #585
Add a pkgconfig file

Providing a pkg-config file makes is easy for 3rd party applications
to link against the libzfs libraries.  It also allows the libzfs
developers to modify the list of required libraries and cflags
without breaking existing applications.

The following example illustrates how pkg-config can be used:

cc `pkg-config --cflags --libs libzfs` -o myapp myapp.c

/*
 * myapp.c
 */
void main()
{
	libzfs_handle_t *hdl;

	hdl = libzfs_init();
	if (hdl)
		libzfs_fini(hdl);
}

Signed-off-by: Turbo Fredriksson <turbo@bayour.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes: #585
WIP: avoid participating in memory defragmentation for now - some code is currently #ifdefed out.
ZFS really needs the memory in use test in arc_reclaim_needed, otherwise
we basically get runaway memory allocation.
Add a missing > to AUTHORS

An email address in the AUTHORS file was missing its trailing >.
This patch fixes that typo.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Fix race condition with zed pidfile creation

When the zed is started as a forking daemon (by default),
a race-condition exists where the parent process can terminate before
the pidfile has been created by the grandchild process.  When invoked
as a Type=forking systemd service, this can result in the following:

  systemd[1]: Starting ZFS Event Daemon (zed)...
  systemd[1]: PID file /var/run/zed.pid not readable (yet?) after start.

This commit adds a daemonize pipe to allow the grandchild process to
signal the parent process that initialization is complete (and the
pidfile has been created).  The parent process will wait for this
notification before exiting.

Signed-off-by: Chris Dunlap <cdunlap@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #2252
Cleanup zed logging

This is a set of minor cleanup changes related to zed logging:
- Remove the program identity prefix from messages written to stderr
  since systemd already prepends this output with the program name.
- Replace the copy of the program identity string with a ptr reference.
- Replace "pid" with "PID" for consistency in comments & strings.
- Rename the zed_log.c struct _ctx component "level" to "priority".
- Add the LOG_PID option for messages written to syslog.

Signed-off-by: Chris Dunlap <cdunlap@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #2252
Change startup mode of ZED

Change the startup mode of ZED to non-forking. While systemd can
track processes that detach from the terminal just fine, running
processes in non-forking mode is the preferred mode of operation.

Also remove user/group definitions as root/root is the default.

Signed-off-by: Chris Dunlap <cdunlap@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2252
Change delimiter for ZED email scripts

When the ZED_EMAIL_INTERVAL_SECS="3600" option is set in zed.rc
configuration file then notification emails should be rate limited.

Rate limiting is accomplished by maintaining a colon delimited state
file which includes the device name.  Unfortunately there are valid
device names which include a colon and therefore prevent the rate
limiting for working properly.  For this reason the delimiter has
been changed to a semi-colon.

Signed-off-by: louwrentius <louwrentius@gmail.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Chris Dunlap <cdunlap@llnl.gov>
Closes #2645
Improve handling of filesystem versions

Change mount code to diagnose filesystem versions that
are not supported by the current implementation.

Change upgrade code to do likewise and refuse to upgrade
a pool if any filesystems on it are a version which is
not supported by the current implementation.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Dan Swartzendruber <dswartz@druber.com>
Closes: #2616
Change the default 'zfs_dedup_prefetch' value to '0'

This gives a huge performance improvement in operations with deduped
datasets especially when the bottleneck is the amount of ram
available for zfs.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2639
Import zfs pools after cryptsetup

The zfs-import-cache.service and zfs-import-scan.service should
should be started after cryptsetup to ensure all LUKS devices have
been opened.

Signed-off-by: alteriks <alteriks@gmail.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #1474
Fix invalid locking order in rename operation

This commit should prevent a deadlock on dp_config_rwlock when
running `zfs rename` by ensuring zvol_rename_minors() is not
called under this lock.

Signed-off-by: Stanislav Seletskiy <s.seletskiy@gmail.com>
Signed-off-by: Richard Yao <ryao@gentoo.org>
Signed-off-by: Tim Chase <tim@chase2k.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2652.
Closes #2525.
Illumos 5049 - panic when removing log device

Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Mattew Ahrens <mahrens@delphix.com>
Reviewed by: Paul Dagnelie <paul.dagnelie@delphix.com>
Reviewed by: Dan Kimmel <dan.kimmel@delphix.com>
Reviewed by: Saso Kiselkov <skiselkov@gmail.com>
Approved by: Rich Lowe <richlowe@richlowe.net>

References:
  https://www.illumos.org/issues/5049
  https://github.com/illumos/illumos-gate/commit/2986efa

Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2636