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Commit Graph

26 Commits

Author SHA1 Message Date
Zdenek Kabelac
55f1d8a269 configure: check for prlimit
Update configure and make code compilable if prlimit() is not present.
Since the code is suspicious do not cope yet with it's replacement
with  set/getrlimit().
2019-08-26 17:24:37 +02:00
Marian Csontos
07d41de74c build: autoreconf 2019-06-07 17:56:56 +02:00
Zdenek Kabelac
116bd314cb configure: check for pselect 2019-04-16 12:14:31 +02:00
Zdenek Kabelac
0b19387dae headers: use configure.h as 1st. header
Ensure configure.h is always 1st. included header.
Maybe we could eventually introduce gcc -include option, but for now
this better uses dependency tracking.

Also move _REENTRANT and _GNU_SOURCE into configure.h so it
doesn't need to be present in various source files.
This ensures consistent compilation of headers like stdio.h since
it may produce different declaration.
2018-12-14 15:09:13 +01:00
David Teigland
904e1e3d26 Place the first PE at 1 MiB for all defaults
. When using default settings, this commit should change
  nothing.  The first PE continues to be placed at 1 MiB
  resulting in a metadata area size of 1020 KiB (for
  4K page sizes; slightly smaller for larger page sizes.)

. When default_data_alignment is disabled in lvm.conf,
  align pe_start at 1 MiB, based on a default metadata area
  size that adapts to the page size.  Previously, disabling
  this option would result in mda_size that was too small
  for common use, and produced a 64 KiB aligned pe_start.

. Customized pe_start and mda_size values continue to be
  set as before in lvm.conf and command line.

. Remove the configure option for setting default_data_alignment
  at build time.

. Improve alignment related option descriptions.

. Add section about alignment to pvcreate man page.

Previously, DEFAULT_PVMETADATASIZE was 255 sectors.
However, the fact that the config setting named
"default_data_alignment" has a default value of 1 (MiB)
meant that DEFAULT_PVMETADATASIZE was having no effect.

The metadata area size is the space between the start of
the metadata area (page size offset from the start of the
device) and the first PE (1 MiB by default due to
default_data_alignment 1.)  The result is a 1020 KiB metadata
area on machines with 4KiB page size (1024 KiB - 4 KiB),
and smaller on machines with larger page size.

If default_data_alignment was set to 0 (disabled), then
DEFAULT_PVMETADATASIZE 255 would take effect, and produce a
metadata area that was 188 KiB and pe_start of 192 KiB.
This was too small for common use.

This is fixed by making the default metadata area size a
computed value that matches the value produced by
default_data_alignment.
2018-11-26 16:36:50 -06:00
Zdenek Kabelac
3a557dcfbf configure: update 2018-11-08 12:22:07 +01:00
Marian Csontos
0c00af776a build: Update configure 2018-09-14 13:53:29 +02:00
Zdenek Kabelac
4a90b0c4c9 build: add vdo configuration option --with-vdo=
Checks whether VDO support is enabled.
Detects presence of 'vdoformat' tool which is required for to format VDO pool.

ATM build of VDO is NOT automatically enabled (None is default).
To enable build of LVM with VDO support use:

configure --with-vdo=internal

TODO: Maybe future version may switch to link some small VDO library for formating
(would require linking and package dependency).
2018-07-09 15:28:35 +02:00
Zdenek Kabelac
6c84a36b53 utils: add clzll
Check for __builtin_clzll and add wrapper when missing.
2018-06-22 23:37:02 +02:00
Joe Thornber
0d22b58172 liblvm: remove lvmapi
This has been deprecated for a while.
2018-06-08 09:38:05 +01:00
David Teigland
3e781ea446 Remove clvmd and associated code
More code reduction and simplification can follow.
2018-06-05 11:09:13 -05:00
Zdenek Kabelac
ad756bb708 build: configure detect libaio
No point to start building lvm without this header file.

Although there could be 'some point' in supporting standalone build
of 'just' libdm  where the libaio might be avoided.

TODO: think about configure option for building libdm only.
2018-05-15 22:02:41 +02:00
Joe Thornber
61153d90e5 build: update ./configure and configure.h.in
Fallout from Dave's removal of format1 and pool.
2018-05-01 12:12:07 +01:00
Joe Thornber
865a9c5873 build: rename configure.in -> configure.ac
Squashes a warning from autotools
2018-04-30 09:42:11 +01:00
Joe Thornber
da7e13ef88 [lib/device/bcache] Tweaks after Kabi's review 2018-04-20 11:10:45 -05:00
Joe Thornber
00f1b208a1 [io paths] Unpick agk's aio stuff 2018-04-20 11:03:58 -05:00
Alasdair G Kergon
8c7bbcfb0f device: Basic config and setup to support async I/O. 2018-02-08 20:15:14 +00:00
David Teigland
6ac1e04b3a replicator: remove the code
It has not been used in a long time and is not
expected to be used further.
2017-10-13 16:20:42 -05:00
Zdenek Kabelac
3018cdcaa7 fsadm: support configurable full path
Just like with other tools lvm2 is using allow to define
fully configurable path.

Default is selected by $PREFIX/sbin/fsadm
2017-04-12 21:34:08 +02:00
Alasdair G Kergon
e8362b4cb7 tools: Show configuration command line in lvm version.
Also update configure.in with some items recently added to the tree.
2017-03-23 01:01:35 +00:00
Bryn M. Reeves
8b78982297 daemons: add dmfilemapd
Add a daemon that can be launched to monitor a group of regions
corresponding to the extents of a file, and to update the regions as the
file's allocation changes.

The daemon is intended to be started from a library interface, but can
also be run from the command line:

  dmfilemapd <fd> <group_id> <path> <mode> [<foreground>[<log_level>]]

Where fd is a file descriptor open on the mapped file, group_id is the
group identifier of the mapped group and mode is either "inode" or
"path". E.g.:

  # dmfilemapd 3 0 vm.img inode 1 3 3<vm.img
  ...

If foreground is non-zero, the daemon will not fork to run in the
background. If verbose is non-zero, libdm and daemon log messages will
be printed.

It is possible for the group identifier to change when regions are
re-mapped: this occurs when the group leader is deleted (regroup=1 in
dm_stats_update_regions_from_fd()), and another region is created before
the daemon has a chance to recreate the leader region.

The operation is inherently racey since there is currently no way to
atomically move or resize a dm_stats region while retaining its
region_id.

Detect this condition and update the group_id value stored in the
filemap monitor.

A function is also provided in the the stats API to launch the filemap
monitoring daemon:

  int dm_stats_start_filemapd(int fd, uint64_t group_id, const char *path,
                              dm_filemapd_mode_t mode, unsigned foreground,
                              unsigned verbose);

This carries out the first fork and execs dmfilemapd with the arguments
specified.

A dm_filemapd_mode_t value is specified by the mode argument: either
DM_FILEMAPD_FOLLOW_INODE, or DM_FILEMAPD_FOLLOW_PATH. A helper function,
dm_filemapd_mode_from_string(), is provided to parse a string containing
a valid mode name into the appropriate dm_filemapd_mode_t value.
2017-03-09 18:50:15 +00:00
Bryn M. Reeves
83a9cd5258 configure: check for __builtin_clz() 2016-12-13 20:38:40 +00:00
Bryn M. Reeves
309bdfa224 libdm: add configure.in checks for fiemap.h and magic.h 2016-07-08 23:42:32 +01:00
Alasdair G Kergon
2159a1429d pre-release 2016-03-11 00:19:16 +00:00
Peter Rajnoha
b8779e706e configure: check for udev_device_get_is_initialized is available
The udev_device_get_is_initialized is available since libudev version
165. Older versions are still used somewhere (e.g. RHEL6). So better
check for this fn and use it only if it's available.
2015-11-11 15:15:50 +01:00
Zdenek Kabelac
95b5d24f43 configure: relocate configure.h
Commit 9403edbb93 move location of
configure.h and lvm-version.h.

Let's try even better place then /conf dir which should be left
for user configurable files.

Put these files right into include dir.
2015-09-11 21:46:35 +02:00