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d7847a8d |
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13-Mar-2024 |
Brooks Davis <brooks@FreeBSD.org> |
lib{c,sys}: return wrapped syscall APIs to libc These provide standard APIs, but are implemented using another system call (e.g., pipe implemented in terms of pipe2) or are interposed by the threading library to support cancelation. After discussion with kib (see D44111), I've concluded that it is better to keep most public interfaces in libc with as little as possible in libsys. Reviewed by: kib Differential Revision: https://reviews.freebsd.org/D44241
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0527c9bd |
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31-Oct-2023 |
Warner Losh <imp@FreeBSD.org> |
ino64: Remove 'forward compat' code for this Forward compatibility code was added for running newer ino64 binaries on older kernels as a transition aide. Now that ino64 has been in the tree 6 years, this code is no longer useful and should have been removed long ago. Remove it now. Should be no user-visible changes at this point as all the 'upgrade' scenarios it was intended for are long since past. Also need to remove this stuff from rtld since the _foo versions no longer exist. Sponsored by: Netflix Reviewed by: kib Differential Revision: https://reviews.freebsd.org/D42382
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f86e6000 |
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04-Dec-2019 |
Warner Losh <imp@FreeBSD.org> |
Regularize my copyright notice o Remove All Rights Reserved from my notices o imp@FreeBSD.org everywhere o regularize punctiation, eliminate date ranges o Make sure that it's clear that I don't claim All Rights reserved by listing All Rights Reserved on same line as other copyright holders (but not me). Other such holders are also listed last where it's clear.
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5ab191c4 |
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23-Jun-2017 |
Warner Losh <imp@FreeBSD.org> |
Forward compatibility for ino64. Add forward compatibility so that new binaries can run on old kernels. If the new system call from ino64 isn't available on your system, then the old one will be used and the results translated. The stat and statfs families of functions are fully emulated. While not required by policy, in this case it is helpful to our users to provide this compatibility. In this case, it allows rollback of the kernel after installing a new userland should a problem be discovered. It also prevents foot-shooting if a user does an install before rebooting with the new kernel. Finally, it allows the use case where one needs to run new binaries on an old kernel as part of an upgrade process. The getdirentries family uses tricks that may not work on remote filesystems. Specifically, it uses a buffer 1/4 the size requested to get the data from he old syscall. The code carefully uses direct syscalls for old system calls to avoid referencing freebsd11_* symbols, which contaminate ld-elf.so.1's export table due to its use of stat functions, which causes errno to be incorrect in client programs due to the wrong *stat* function being resolved in some cases. This code should removed sometime after 12 is branched. Tested on: 12-current binaries on a 10.3-beta kernel run and return consistent results. 12-current kernel and userland with packages from before ino64 was committed also work. Differential Revision: https://reviews.freebsd.org/D11185 Reviewed by: kib@, emaste@
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69921123 |
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23-May-2017 |
Konstantin Belousov <kib@FreeBSD.org> |
Commit the 64-bit inode project. Extend the ino_t, dev_t, nlink_t types to 64-bit ints. Modify struct dirent layout to add d_off, increase the size of d_fileno to 64-bits, increase the size of d_namlen to 16-bits, and change the required alignment. Increase struct statfs f_mntfromname[] and f_mntonname[] array length MNAMELEN to 1024. ABI breakage is mitigated by providing compatibility using versioned symbols, ingenious use of the existing padding in structures, and by employing other tricks. Unfortunately, not everything can be fixed, especially outside the base system. For instance, third-party APIs which pass struct stat around are broken in backward and forward incompatible ways. Kinfo sysctl MIBs ABI is changed in backward-compatible way, but there is no general mechanism to handle other sysctl MIBS which return structures where the layout has changed. It was considered that the breakage is either in the management interfaces, where we usually allow ABI slip, or is not important. Struct xvnode changed layout, no compat shims are provided. For struct xtty, dev_t tty device member was reduced to uint32_t. It was decided that keeping ABI compat in this case is more useful than reporting 64-bit dev_t, for the sake of pstat. Update note: strictly follow the instructions in UPDATING. Build and install the new kernel with COMPAT_FREEBSD11 option enabled, then reboot, and only then install new world. Credits: The 64-bit inode project, also known as ino64, started life many years ago as a project by Gleb Kurtsou (gleb). Kirk McKusick (mckusick) then picked up and updated the patch, and acted as a flag-waver. Feedback, suggestions, and discussions were carried by Ed Maste (emaste), John Baldwin (jhb), Jilles Tjoelker (jilles), and Rick Macklem (rmacklem). Kris Moore (kris) performed an initial ports investigation followed by an exp-run by Antoine Brodin (antoine). Essential and all-embracing testing was done by Peter Holm (pho). The heavy lifting of coordinating all these efforts and bringing the project to completion were done by Konstantin Belousov (kib). Sponsored by: The FreeBSD Foundation (emaste, kib) Differential revision: https://reviews.freebsd.org/D10439
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