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mirror_zfs/config/kernel-current-time.m4

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Linux 4.12 compat: CURRENT_TIME removed Linux 4.9 added current_time() as the preferred interface to get the filesystem time. CURRENT_TIME was retired in Linux 4.12. Reviewed-by: Chunwei Chen <david.chen@osnexus.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #6114
2017-05-10 19:30:48 +03:00
dnl #
dnl # 4.9, current_time() added
Linux 4.18 compat: inode timespec -> timespec64 Commit torvalds/linux@95582b0 changes the inode i_atime, i_mtime, and i_ctime members form timespec's to timespec64's to make them 2038 safe. As part of this change the current_time() function was also updated to return the timespec64 type. Resolve this issue by introducing a new inode_timespec_t type which is defined to match the timespec type used by the inode. It should be used when working with inode timestamps to ensure matching types. The timestruc_t type under Illumos was used in a similar fashion but was specified to always be a timespec_t. Rather than incorrectly define this type all timespec_t types have been replaced by the new inode_timespec_t type. Finally, the kernel and user space 'sys/time.h' headers were aligned with each other. They define as appropriate for the context several constants as macros and include static inline implementation of gethrestime(), gethrestime_sec(), and gethrtime(). Reviewed-by: Chunwei Chen <tuxoko@gmail.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #7643
2018-06-20 07:51:18 +03:00
dnl # 4.18, return type changed from timespec to timespec64
Linux 4.12 compat: CURRENT_TIME removed Linux 4.9 added current_time() as the preferred interface to get the filesystem time. CURRENT_TIME was retired in Linux 4.12. Reviewed-by: Chunwei Chen <david.chen@osnexus.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #6114
2017-05-10 19:30:48 +03:00
dnl #
Linux 6.7 compat: simplify current_time() check 6.7 changed the names of the time members in struct inode, so we can't assign back to it because we don't know its name. In practice this doesn't matter though - if we're missing current_time(), then we must be on <4.9, and we know our fallback will need to return timespec. Reviewed-by: Tony Hutter <hutter2@llnl.gov> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Rob Norris <robn@despairlabs.com> Sponsored-by: https://github.com/sponsors/robn Closes #15681
2023-12-16 10:01:45 +03:00
dnl # Note that we don't care about the return type in this check. If we have
dnl # to implement a fallback, we'll know we're <4.9, which was timespec.
dnl #
Perform KABI checks in parallel 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 <hutter2@llnl.gov> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #8547 Closes #9132 Closes #9341
2019-10-01 22:50:34 +03:00
AC_DEFUN([ZFS_AC_KERNEL_SRC_CURRENT_TIME], [
ZFS_LINUX_TEST_SRC([current_time], [
Linux 4.12 compat: CURRENT_TIME removed Linux 4.9 added current_time() as the preferred interface to get the filesystem time. CURRENT_TIME was retired in Linux 4.12. Reviewed-by: Chunwei Chen <david.chen@osnexus.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #6114
2017-05-10 19:30:48 +03:00
#include <linux/fs.h>
], [
Linux 4.18 compat: inode timespec -> timespec64 Commit torvalds/linux@95582b0 changes the inode i_atime, i_mtime, and i_ctime members form timespec's to timespec64's to make them 2038 safe. As part of this change the current_time() function was also updated to return the timespec64 type. Resolve this issue by introducing a new inode_timespec_t type which is defined to match the timespec type used by the inode. It should be used when working with inode timestamps to ensure matching types. The timestruc_t type under Illumos was used in a similar fashion but was specified to always be a timespec_t. Rather than incorrectly define this type all timespec_t types have been replaced by the new inode_timespec_t type. Finally, the kernel and user space 'sys/time.h' headers were aligned with each other. They define as appropriate for the context several constants as macros and include static inline implementation of gethrestime(), gethrestime_sec(), and gethrtime(). Reviewed-by: Chunwei Chen <tuxoko@gmail.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #7643
2018-06-20 07:51:18 +03:00
struct inode ip __attribute__ ((unused));
Linux 6.7 compat: simplify current_time() check 6.7 changed the names of the time members in struct inode, so we can't assign back to it because we don't know its name. In practice this doesn't matter though - if we're missing current_time(), then we must be on <4.9, and we know our fallback will need to return timespec. Reviewed-by: Tony Hutter <hutter2@llnl.gov> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Rob Norris <robn@despairlabs.com> Sponsored-by: https://github.com/sponsors/robn Closes #15681
2023-12-16 10:01:45 +03:00
(void) current_time(&ip);
Perform KABI checks in parallel 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 <hutter2@llnl.gov> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #8547 Closes #9132 Closes #9341
2019-10-01 22:50:34 +03:00
])
])
AC_DEFUN([ZFS_AC_KERNEL_CURRENT_TIME], [
AC_MSG_CHECKING([whether current_time() exists])
ZFS_LINUX_TEST_RESULT_SYMBOL([current_time],
[current_time], [fs/inode.c], [
Linux 4.12 compat: CURRENT_TIME removed Linux 4.9 added current_time() as the preferred interface to get the filesystem time. CURRENT_TIME was retired in Linux 4.12. Reviewed-by: Chunwei Chen <david.chen@osnexus.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #6114
2017-05-10 19:30:48 +03:00
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_CURRENT_TIME, 1, [current_time() exists])
], [
AC_MSG_RESULT(no)
])
])
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