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* Linux compat: Minimum kernel version 3.10Brian Behlendorf2019-11-121-39/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Increase the minimum supported kernel version from 2.6.32 to 3.10. This removes support for the following Linux enterprise distributions. Distribution | Kernel | End of Life ---------------- | ------ | ------------- Ubuntu 12.04 LTS | 3.2 | Apr 28, 2017 SLES 11 | 3.0 | Mar 32, 2019 RHEL / CentOS 6 | 2.6.32 | Nov 30, 2020 The following changes were made as part of removing support. * Updated `configure` to enforce a minimum kernel version as specified in the META file (Linux-Minimum: 3.10). configure: error: *** Cannot build against kernel version 2.6.32. *** The minimum supported kernel version is 3.10. * Removed all `configure` kABI checks and matching C code for interfaces which solely predate the Linux 3.10 kernel. * Updated all `configure` kABI checks to fail when an interface is missing which was in the 3.10 kernel up to the latest 5.1 kernel. Removed the HAVE_* preprocessor defines for these checks and updated the code to unconditionally use the verified interface. * Inverted the detection logic in several kABI checks to match the new interface as it appears in 3.10 and newer and not the legacy interface. * Consolidated the following checks in to individual files. Due the large number of changes in the checks it made sense to handle this now. It would be desirable to group other related checks in the same fashion, but this as left as future work. - config/kernel-blkdev.m4 - Block device kABI checks - config/kernel-blk-queue.m4 - Block queue kABI checks - config/kernel-bio.m4 - Bio interface kABI checks * Removed the kABI checks for sops->nr_cached_objects() and sops->free_cached_objects(). These interfaces are currently unused. Signed-off-by: Brian Behlendorf <[email protected]> Closes #9566
* Perform KABI checks in parallelBrian Behlendorf2019-10-011-11/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Reduce the time required for ./configure to perform the needed KABI checks by allowing kbuild to compile multiple test cases in parallel. This was accomplished by splitting each test's source code from the logic handling whether that code could be compiled or not. By introducing this split it's possible to minimize the number of times kbuild needs to be invoked. As importantly, it means all of the tests can be built in parallel. This does require a little extra care since we expect some tests to fail, so the --keep-going (-k) option must be provided otherwise some tests may not get compiled. Furthermore, since a failure during the kbuild modpost phase will result in an early exit; the final linking phase is limited to tests which passed the initial compilation and produced an object file. Once everything has been built the configure script proceeds as previously. The only significant difference is that it now merely needs to test for the existence of a .ko file to determine the result of a given test. This vastly speeds up the entire process. New test cases should use ZFS_LINUX_TEST_SRC to declare their test source code and ZFS_LINUX_TEST_RESULT to check the result. All of the existing kernel-*.m4 files have been updated accordingly, see config/kernel-current-time.m4 for a basic example. The legacy ZFS_LINUX_TRY_COMPILE macro has been kept to handle special cases but it's use is not encouraged. master (secs) patched (secs) ------------- ---------------- autogen.sh 61 68 configure 137 24 (~17% of current run time) make -j $(nproc) 44 44 make rpms 287 150 Reviewed-by: Tony Hutter <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #8547 Closes #9132 Closes #9341
* Fix lookup_bdev() on UbuntuHajo Möller2016-10-261-5/+17
| | | | | | | | | | | | Ubuntu added support for checking inode permissions to lookup_bdev() in kernel commit 193fb6a2c94fab8eb8ce70a5da4d21c7d4023bee (merged in 4.4.0-6.21). Upstream bug: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1636517 This patch adds a test for Ubuntu's variant of lookup_bdev() to configure and calls the function in the correct way. Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Hajo Möller <[email protected]> Closes #5336
* Linux 2.6.26 compat, lookup_bdev()Brian Behlendorf2013-01-281-0/+17
It's doubtful many people were impacted by this but commit 6c28567 accidentally broke ZFS builds for 2.6.26 and earlier kernels. This commit depends on the lookup_bdev() function which exists in 2.6.26 but wasn't exported until 2.6.27. The availability of the function isn't critical so a wrapper is introduced which returns ERR_PTR(-ENOTSUP) when the function isn't defined. This will have the effect of causing zvol_is_zvol() to always fail for 2.6.26 kernels. This in turn means vdevs will always get opened concurrently which is good for normal usage. This will only become an issue if your using a zvol as a vdev in another pool. In which case you really should be using a newer kernel anyway. Signed-off-by: Brian Behlendorf <[email protected]> Closes #1205