- 17 Jul, 2019 40 commits
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Oleg Nesterov authored
Now that restore_saved_sigmask_unless() is always called with the same argument right before poll_select_copy_remaining() we can move it into poll_select_copy_remaining() and make it the only caller of restore() in fs/select.c. The patch also renames poll_select_copy_remaining(), poll_select_finish() looks better after this change. kern_select() doesn't use set_user_sigmask(), so in this case poll_select_finish() does restore_saved_sigmask_unless() "for no reason". But this won't hurt, and WARN_ON(!TIF_SIGPENDING) is still valid. Link: http://lkml.kernel.org/r/20190606140915.GC13440@redhat.comSigned-off-by:
Oleg Nesterov <oleg@redhat.com> Cc: Al Viro <viro@ZenIV.linux.org.uk> Cc: Arnd Bergmann <arnd@arndb.de> Cc: David Laight <David.Laight@aculab.com> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: Deepa Dinamani <deepa.kernel@gmail.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Eric Wong <e@80x24.org> Cc: Jason Baron <jbaron@akamai.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Oleg Nesterov authored
do_poll() returns -EINTR if interrupted and after that all its callers have to translate it into -ERESTARTNOHAND. Change do_poll() to return -ERESTARTNOHAND and update (simplify) the callers. Note that this also unifies all users of restore_saved_sigmask_unless(), see the next patch. Linus: : The *right* return value will actually be then chosen by : poll_select_copy_remaining(), which will turn ERESTARTNOHAND to EINTR : when it can't update the timeout. : : Except for the cases that use restart_block and do that instead and : don't have the whole timeout restart issue as a result. Link: http://lkml.kernel.org/r/20190606140852.GB13440@redhat.comSigned-off-by:
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Oleg Nesterov authored
task->saved_sigmask and ->restore_sigmask are only used in the ret-from- syscall paths. This means that set_user_sigmask() can save ->blocked in ->saved_sigmask and do set_restore_sigmask() to indicate that ->blocked was modified. This way the callers do not need 2 sigset_t's passed to set/restore and restore_user_sigmask() renamed to restore_saved_sigmask_unless() turns into the trivial helper which just calls restore_saved_sigmask(). Link: http://lkml.kernel.org/r/20190606113206.GA9464@redhat.comSigned-off-by:
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Alexey Dobriyan authored
struct sighand_struct::siglock field is the most used field by far, put it first so that is can be accessed without IMM8 or IMM32 encoding on x86_64. Space savings (on trimmed down VM test config): add/remove: 0/0 grow/shrink: 8/68 up/down: 49/-1147 (-1098) Function old new delta complete_signal 512 533 +21 do_signalfd4 335 346 +11 __cleanup_sighand 39 43 +4 unhandled_signal 49 52 +3 prepare_signal 692 695 +3 ignore_signals 37 40 +3 __tty_check_change.part 248 251 +3 ksys_unshare 780 781 +1 sighand_ctor 33 29 -4 ptrace_trap_notify 60 56 -4 sigqueue_free 98 91 -7 run_posix_cpu_timers 1389 1382 -7 proc_pid_status 2448 2441 -7 proc_pid_limits 344 337 -7 posix_cpu_timer_rearm 222 215 -7 posix_cpu_timer_get 249 242 -7 kill_pid_info_as_cred 243 236 -7 freeze_task 197 190 -7 flush_old_exec 1873 1866 -7 do_task_stat 3363 3356 -7 do_send_sig_info 98 91 -7 do_group_exit 147 140 -7 init_sighand 2088 2080 -8 do_notify_parent_cldstop 399 391 -8 signalfd_cleanup 50 41 -9 do_notify_parent 557 545 -12 __send_signal 1029 1017 -12 ptrace_stop 590 577 -13 get_signal 1576 1563 -13 __lock_task_sighand 112 99 -13 zap_pid_ns_processes 391 377 -14 update_rlimit_cpu 78 64 -14 tty_signal_session_leader 413 399 -14 tty_open_proc_set_tty 149 135 -14 tty_jobctrl_ioctl 936 922 -14 set_cpu_itimer 339 325 -14 ptrace_resume 226 212 -14 ptrace_notify 110 96 -14 proc_clear_tty 81 67 -14 posix_cpu_timer_del 229 215 -14 kernel_sigaction 156 142 -14 getrusage 977 963 -14 get_current_tty 98 84 -14 force_sigsegv 89 75 -14 force_sig_info 205 191 -14 flush_signals 83 69 -14 flush_itimer_signals 85 71 -14 do_timer_create 1120 1106 -14 do_sigpending 88 74 -14 do_signal_stop 537 523 -14 cgroup_init_fs_context 644 630 -14 call_usermodehelper_exec_async 402 388 -14 calculate_sigpending 58 44 -14 __x64_sys_timer_delete 248 234 -14 __set_current_blocked 80 66 -14 __ptrace_unlink 310 296 -14 __ptrace_detach.part 187 173 -14 send_sigqueue 362 347 -15 get_cpu_itimer 214 199 -15 signalfd_poll 175 159 -16 dequeue_signal 340 323 -17 do_getitimer 192 174 -18 release_task.part 1060 1040 -20 ptrace_peek_siginfo 408 387 -21 posix_cpu_timer_set 827 806 -21 exit_signals 437 416 -21 do_sigaction 541 520 -21 do_setitimer 485 464 -21 disassociate_ctty.part 545 517 -28 __x64_sys_rt_sigtimedwait 721 679 -42 __x64_sys_ptrace 1319 1277 -42 ptrace_request 1828 1782 -46 signalfd_read 507 459 -48 wait_consider_task 2027 1971 -56 do_coredump 3672 3616 -56 copy_process.part 6936 6871 -65 Link: http://lkml.kernel.org/r/20190503192800.GA18004@avx2Signed-off-by:
Alexey Dobriyan <adobriyan@gmail.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Oleg Nesterov <oleg@redhat.com> Signed-off-by:
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Dmitry V. Levin authored
Check whether PTRACE_GET_SYSCALL_INFO semantics implemented in the kernel matches userspace expectations. [akpm@linux-foundation.org: coding-style fixes] Link: http://lkml.kernel.org/r/20190510152852.GG28558@altlinux.orgSigned-off-by:
Dmitry V. Levin <ldv@altlinux.org> Acked-by:
Shuah Khan <shuah@kernel.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Elvira Khabirova <lineprinter@altlinux.org> Cc: Eugene Syromyatnikov <esyr@redhat.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Greentime Hu <greentime@andestech.com> Cc: Helge Deller <deller@gmx.de> [parisc] Cc: James E.J. Bottomley <jejb@parisc-linux.org> Cc: James Hogan <jhogan@kernel.org> Cc: kbuild test robot <lkp@intel.com> Cc: Kees Cook <keescook@chromium.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Paul Burton <paul.burton@mips.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Richard Kuo <rkuo@codeaurora.org> Cc: Vincent Chen <deanbo422@gmail.com> Signed-off-by:
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Elvira Khabirova authored
PTRACE_GET_SYSCALL_INFO is a generic ptrace API that lets ptracer obtain details of the syscall the tracee is blocked in. There are two reasons for a special syscall-related ptrace request. Firstly, with the current ptrace API there are cases when ptracer cannot retrieve necessary information about syscalls. Some examples include: * The notorious int-0x80-from-64-bit-task issue. See [1] for details. In short, if a 64-bit task performs a syscall through int 0x80, its tracer has no reliable means to find out that the syscall was, in fact, a compat syscall, and misidentifies it. * Syscall-enter-stop and syscall-exit-stop look the same for the tracer. Common practice is to keep track of the sequence of ptrace-stops in order not to mix the two syscall-stops up. But it is not as simple as it looks; for example, strace had a (just recently fixed) long-standing bug where attaching strace to a tracee that is performing the execve system call led to the tracer identifying the following syscall-exit-stop as syscall-enter-stop, which messed up all the state tracking. * Since the introduction of commit 84d77d3f ("ptrace: Don't allow accessing an undumpable mm"), both PTRACE_PEEKDATA and process_vm_readv become unavailable when the process dumpable flag is cleared. On such architectures as ia64 this results in all syscall arguments being unavailable for the tracer. Secondly, ptracers also have to support a lot of arch-specific code for obtaining information about the tracee. For some architectures, this requires a ptrace(PTRACE_PEEKUSER, ...) invocation for every syscall argument and return value. ptrace(2) man page: long ptrace(enum __ptrace_request request, pid_t pid, void *addr, void *data); ... PTRACE_GET_SYSCALL_INFO Retrieve information about the syscall that caused the stop. The information is placed into the buffer pointed by "data" argument, which should be a pointer to a buffer of type "struct ptrace_syscall_info". The "addr" argument contains the size of the buffer pointed to by "data" argument (i.e., sizeof(struct ptrace_syscall_info)). The return value contains the number of bytes available to be written by the kernel. If the size of data to be written by the kernel exceeds the size specified by "addr" argument, the output is truncated. [ldv@altlinux.org: selftests/seccomp/seccomp_bpf: update for PTRACE_GET_SYSCALL_INFO] Link: http://lkml.kernel.org/r/20190708182904.GA12332@altlinux.org Link: http://lkml.kernel.org/r/20190510152842.GF28558@altlinux.orgSigned-off-by:
Elvira Khabirova <lineprinter@altlinux.org> Co-developed-by:
Kees Cook <keescook@chromium.org> Reviewed-by:
Andy Lutomirski <luto@kernel.org> Cc: Eugene Syromyatnikov <esyr@redhat.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Greentime Hu <greentime@andestech.com> Cc: Helge Deller <deller@gmx.de> [parisc] Cc: James E.J. Bottomley <jejb@parisc-linux.org> Cc: James Hogan <jhogan@kernel.org> Cc: kbuild test robot <lkp@intel.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Paul Burton <paul.burton@mips.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Richard Kuo <rkuo@codeaurora.org> Cc: Shuah Khan <shuah@kernel.org> Cc: Vincent Chen <deanbo422@gmail.com> Signed-off-by:
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Dmitry V. Levin authored
syscall_get_error() is required to be implemented on this architecture in addition to already implemented syscall_get_nr(), syscall_get_arguments(), syscall_get_return_value(), and syscall_get_arch() functions in order to extend the generic ptrace API with PTRACE_GET_SYSCALL_INFO request. Link: http://lkml.kernel.org/r/20190510152824.GE28558@altlinux.orgSigned-off-by:
Michael Ellerman <mpe@ellerman.id.au> Cc: Elvira Khabirova <lineprinter@altlinux.org> Cc: Eugene Syromyatnikov <esyr@redhat.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Greentime Hu <greentime@andestech.com> Cc: Helge Deller <deller@gmx.de> [parisc] Cc: James E.J. Bottomley <jejb@parisc-linux.org> Cc: James Hogan <jhogan@kernel.org> Cc: kbuild test robot <lkp@intel.com> Cc: Kees Cook <keescook@chromium.org> Cc: Paul Burton <paul.burton@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Richard Kuo <rkuo@codeaurora.org> Cc: Shuah Khan <shuah@kernel.org> Cc: Vincent Chen <deanbo422@gmail.com> Signed-off-by:
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Dmitry V. Levin authored
syscall_get_error() is required to be implemented on all architectures in addition to already implemented syscall_get_nr(), syscall_get_arguments(), syscall_get_return_value(), and syscall_get_arch() functions in order to extend the generic ptrace API with PTRACE_GET_SYSCALL_INFO request. Link: http://lkml.kernel.org/r/20190510152812.GD28558@altlinux.orgSigned-off-by:
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Dmitry V. Levin authored
syscall_get_error() is required to be implemented on all architectures in addition to already implemented syscall_get_nr(), syscall_get_arguments(), syscall_get_return_value(), and syscall_get_arch() functions in order to extend the generic ptrace API with PTRACE_GET_SYSCALL_INFO request. Link: http://lkml.kernel.org/r/20190510152803.GC28558@altlinux.orgSigned-off-by:
Paul Burton <paul.burton@mips.com> Cc: Elvira Khabirova <lineprinter@altlinux.org> Cc: Eugene Syromyatnikov <esyr@redhat.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: James Hogan <jhogan@kernel.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Greentime Hu <greentime@andestech.com> Cc: Helge Deller <deller@gmx.de> [parisc] Cc: James E.J. Bottomley <jejb@parisc-linux.org> Cc: kbuild test robot <lkp@intel.com> Cc: Kees Cook <keescook@chromium.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Paul Mackerras <paulus@samba.org> Cc: Richard Kuo <rkuo@codeaurora.org> Cc: Shuah Khan <shuah@kernel.org> Cc: Vincent Chen <deanbo422@gmail.com> Signed-off-by:
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Dmitry V. Levin authored
syscall_get_* functions are required to be implemented on all architectures in order to extend the generic ptrace API with PTRACE_GET_SYSCALL_INFO request. This adds remaining 2 syscall_get_* functions as documented in asm-generic/syscall.h: syscall_get_error and syscall_get_return_value. Link: http://lkml.kernel.org/r/20190510152756.GB28558@altlinux.orgSigned-off-by:
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Dmitry V. Levin authored
PTRACE_GET_SYSCALL_INFO is a generic ptrace API that lets ptracer obtain details of the syscall the tracee is blocked in. There are two reasons for a special syscall-related ptrace request. Firstly, with the current ptrace API there are cases when ptracer cannot retrieve necessary information about syscalls. Some examples include: * The notorious int-0x80-from-64-bit-task issue. See [1] for details. In short, if a 64-bit task performs a syscall through int 0x80, its tracer has no reliable means to find out that the syscall was, in fact, a compat syscall, and misidentifies it. * Syscall-enter-stop and syscall-exit-stop look the same for the tracer. Common practice is to keep track of the sequence of ptrace-stops in order not to mix the two syscall-stops up. But it is not as simple as it looks; for example, strace had a (just recently fixed) long-standing bug where attaching strace to a tracee that is performing the execve system call led to the tracer identifying the following syscall-exit-stop as syscall-enter-stop, which messed up all the state tracking. * Since the introduction of commit 84d77d3f ("ptrace: Don't allow accessing an undumpable mm"), both PTRACE_PEEKDATA and process_vm_readv become unavailable when the process dumpable flag is cleared. On such architectures as ia64 this results in all syscall arguments being unavailable for the tracer. Secondly, ptracers also have to support a lot of arch-specific code for obtaining information about the tracee. For some architectures, this requires a ptrace(PTRACE_PEEKUSER, ...) invocation for every syscall argument and return value. PTRACE_GET_SYSCALL_INFO returns the following structure: struct ptrace_syscall_info { __u8 op; /* PTRACE_SYSCALL_INFO_* */ __u32 arch __attribute__((__aligned__(sizeof(__u32)))); __u64 instruction_pointer; __u64 stack_pointer; union { struct { __u64 nr; __u64 args[6]; } entry; struct { __s64 rval; __u8 is_error; } exit; struct { __u64 nr; __u64 args[6]; __u32 ret_data; } seccomp; }; }; The structure was chosen according to [2], except for the following changes: * seccomp substructure was added as a superset of entry substructure * the type of nr field was changed from int to __u64 because syscall numbers are, as a practical matter, 64 bits * stack_pointer field was added along with instruction_pointer field since it is readily available and can save the tracer from extra PTRACE_GETREGS/PTRACE_GETREGSET calls * arch is always initialized to aid with tracing system calls such as execve() * instruction_pointer and stack_pointer are always initialized so they could be easily obtained for non-syscall stops * a boolean is_error field was added along with rval field, this way the tracer can more reliably distinguish a return value from an error value strace has been ported to PTRACE_GET_SYSCALL_INFO. Starting with release 4.26, strace uses PTRACE_GET_SYSCALL_INFO API as the preferred mechanism of obtaining syscall information. [1] https://lore.kernel.org/lkml/CA+55aFzcSVmdDj9Lh_gdbz1OzHyEm6ZrGPBDAJnywm2LF_eVyg@mail.gmail.com/ [2] https://lore.kernel.org/lkml/CAObL_7GM0n80N7J_DFw_eQyfLyzq+sf4y2AvsCCV88Tb3AwEHA@mail.gmail.com/ This patch (of 7): All syscall_get_*() and syscall_set_*() functions must be defined as static inline as on all other architectures, otherwise asm/syscall.h cannot be included in more than one compilation unit. This bug has to be fixed in order to extend the generic ptrace API with PTRACE_GET_SYSCALL_INFO request. Link: http://lkml.kernel.org/r/20190510152749.GA28558@altlinux.org Fixes: 1932fbe3 ("nds32: System calls handling") Signed-off-by:
kbuild test robot <lkp@intel.com> Acked-by:
Greentime Hu <greentime@andestech.com> Cc: Vincent Chen <deanbo422@gmail.com> Cc: Elvira Khabirova <lineprinter@altlinux.org> Cc: Eugene Syromyatnikov <esyr@redhat.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Helge Deller <deller@gmx.de> [parisc] Cc: James E.J. Bottomley <jejb@parisc-linux.org> Cc: James Hogan <jhogan@kernel.org> Cc: Kees Cook <keescook@chromium.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Paul Burton <paul.burton@mips.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Richard Kuo <rkuo@codeaurora.org> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by:
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Hariprasad Kelam authored
Change return type of dirty_one_transaction from int to void. As this function always return success. Fixes below issue reported by coccicheck: fs/reiserfs/journal.c:1690:5-8: Unneeded variable: "ret". Return "0" on line 1719 Link: http://lkml.kernel.org/r/20190702175430.GA5882@hari-Inspiron-1545Signed-off-by:
Hariprasad Kelam <hariprasad.kelam@gmail.com> Reviewed-by:
Jan Kara <jack@suse.cz> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Bharath Vedartham <linux.bhar@gmail.com> Cc: Hariprasad Kelam <hariprasad.kelam@gmail.com> Signed-off-by:
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YueHaibing authored
Fixes gcc '-Wunused-but-set-variable' warning: fs/ufs/super.c: In function ufs_statfs: fs/ufs/super.c:1409:32: warning: variable usb3 set but not used [-Wunused-but-set-variable] It is not used since commmit c596961d ("ufs: fix s_size/s_dsize users") Link: http://lkml.kernel.org/r/20190525140654.15924-1-yuehaibing@huawei.comSigned-off-by:
YueHaibing <yuehaibing@huawei.com> Cc: Evgeniy Dushistov <dushistov@mail.ru> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by:
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Mathieu Malaterre authored
strncpy() was used to copy a fixed size buffer. Since NUL-terminating string is not required here, prefer a memcpy function. The generated code (ppc32) remains the same. Silence the following warning triggered using W=1: fs/hfsplus/xattr.c:410:3: warning: 'strncpy' output truncated before terminating nul copying 4 bytes from a string of the same length [-Wstringop-truncation] Link: http://lkml.kernel.org/r/20190529113341.11972-1-malat@debian.orgSigned-off-by:
Mathieu Malaterre <malat@debian.org> Reviewed-by:
Vyacheslav Dubeyko <slava@dubeyko.com> Signed-off-by:
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Pedro Cuadra authored
This adds support for partial file caching in Coda. Every read, write and mmap informs the userspace cache manager about what part of a file is about to be accessed so that the cache manager can ensure the relevant parts are available before the operation is allowed to proceed. When a read or write operation completes, this is also reported to allow the cache manager to track when partially cached content can be released. If the cache manager does not support partial file caching, or when the entire file has been fetched into the local cache, the cache manager may return an EOPNOTSUPP error to indicate that intent upcalls are no longer necessary until the file is closed. [akpm@linux-foundation.org: little whitespace fixup] Link: http://lkml.kernel.org/r/20190618181301.6960-1-jaharkes@cs.cmu.eduSigned-off-by:
Pedro Cuadra <pjcuadra@gmail.com> Signed-off-by:
Jan Harkes <jaharkes@cs.cmu.edu> Signed-off-by:
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Fabian Frederick authored
This patch moves cfi check in coda_ftoc() instead of repeating it in the wild. Module size text data bss dec hex filename 28297 1040 700 30037 7555 fs/coda/coda.ko.before 28263 980 700 29943 74f7 fs/coda/coda.ko.after Link: http://lkml.kernel.org/r/a2c27663ec4547018c92d71c63b1dff4650b6546.1558117389.git.jaharkes@cs.cmu.eduSigned-off-by:Fabian Frederick <fabf@skynet.be> Signed-off-by:
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Fabian Frederick authored
coda_fid_to_inode() is only called by coda_downcall() where sb is already being tested. Link: http://lkml.kernel.org/r/d2163b3136348faf83ba47dc2d65a5d0a9a135dd.1558117389.git.jaharkes@cs.cmu.eduSigned-off-by:
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Fabian Frederick authored
Inspired by NFS sysctl process Link: http://lkml.kernel.org/r/9afcc2cd09490849b309786bbf47fef75de7f91c.1558117389.git.jaharkes@cs.cmu.eduSigned-off-by:
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Fabian Frederick authored
init_coda_psdev() was only called by __init function. Link: http://lkml.kernel.org/r/a12a5a135fa6b0ea997e1a0af4be0a235c463a24.1558117389.git.jaharkes@cs.cmu.eduSigned-off-by:
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Fabian Frederick authored
max_t expression was already defined in coda sources Link: http://lkml.kernel.org/r/e6cda497ce8691db155cb35f8d13ea44ca6cedeb.1558117389.git.jaharkes@cs.cmu.eduSigned-off-by:
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Fabian Frederick authored
We can safely destroy vc_mutex at the end of umount process. Link: http://lkml.kernel.org/r/f436f68908c467c5663bc6a9251b52cd7b95d2a5.1558117389.git.jaharkes@cs.cmu.eduSigned-off-by:
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Jan Harkes authored
Nothing is left in this header that is used by userspace. Link: http://lkml.kernel.org/r/bb11378cef94739f2cf89425dd6d302a52c64480.1558117389.git.jaharkes@cs.cmu.eduSigned-off-by:
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David Howells authored
Move include/linux/coda_psdev.h to fs/coda/ as there's nothing else that uses it. Link: http://lkml.kernel.org/r/3ceeee0415a929b89fb02700b6b4b3a07938acb8.1558117389.git.jaharkes@cs.cmu.edu Link: https://patchwork.kernel.org/patch/10590257/Signed-off-by:
David Howells <dhowells@redhat.com> Signed-off-by:
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Jan Harkes authored
The out of tree module version had been bumped several times already, but we haven't kept this in-tree one in sync, partly because most changes go from here to the out-of-tree copy. Link: http://lkml.kernel.org/r/8b0ab50a2da2f0180ac32c79d91811b4d1d0bd8b.1558117389.git.jaharkes@cs.cmu.eduSigned-off-by:
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Dan Carpenter authored
The CODA_FREE() macro just calls kvfree(). We can call that directly instead. Link: http://lkml.kernel.org/r/4950a94fd30ec5f84835dd4ca0bb67c0448672f5.1558117389.git.jaharkes@cs.cmu.eduSigned-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
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Dan Carpenter authored
These days we have kvzalloc() so we can delete CODA_ALLOC(). I made a couple related changes in coda_psdev_write(). First, I added some error handling to avoid a NULL dereference if the allocation failed. Second, I used kvmalloc() instead of kvzalloc() because we copy over the memory on the next line so there is no need to zero it first. Link: http://lkml.kernel.org/r/e56010c822e7a7cbaa8a238cf82ad31c67eaa800.1558117389.git.jaharkes@cs.cmu.eduSigned-off-by:
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Jan Harkes authored
Move the 32-bit time_t problems to userspace. Link: http://lkml.kernel.org/r/8d089068823bfb292a4020f773922fbd82ffad39.1558117389.git.jaharkes@cs.cmu.eduSigned-off-by:
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Arnd Bergmann authored
We exchange file timestamps with user space using psdev device read/write operations with a fixed but architecture specific binary layout. On 32-bit systems, this uses a 'timespec' structure that is defined by the C library to contain two 32-bit values for seconds and nanoseconds. As we get ready for the year 2038 overflow of the 32-bit signed seconds, the kernel now uses 64-bit timestamps internally, and user space will do the same change by changing the 'timespec' definition in the future. Unfortunately, this breaks the layout of the coda_vattr structure, so we need to redefine that in terms of something that does not change. I'm introducing a new 'struct vtimespec' structure here that keeps the existing layout, and the same change has to be done in the coda user space copy of linux/coda.h before anyone can use that on a 32-bit architecture with 64-bit time_t. An open question is what should happen to actual times past y2038, as they are now truncated to the last valid date when sent to user space, and interpreted as pre-1970 times when a timestamp with the MSB set is read back into the kernel. Alternatively, we could change the new timespec64_to_coda()/coda_to_timespec64() functions to use a different interpretation and extend the available range further to the future by disallowing past timestamps. This would require more changes in the user space side though. Link: http://lkml.kernel.org/r/562b7324149461743e4fbe2fedbf7c242f7e274a.1558117389.git.jaharkes@cs.cmu.edu Link: https://patchwork.kernel.org/patch/10474735/Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Signed-off-by:
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Colin Ian King authored
Trivial fix to clean up indentation, replace spaces with tab Link: http://lkml.kernel.org/r/ffc2bfa5a37ffcdf891c51b2e2ed618103965b24.1558117389.git.jaharkes@cs.cmu.eduSigned-off-by:
Colin Ian King <colin.king@canonical.com> Signed-off-by:
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Jan Harkes authored
These constants only used internally and not exposed to userspace. Link: http://lkml.kernel.org/r/baeafc30dad70d8b422ee679420099c2d8aa7da0.1558117389.git.jaharkes@cs.cmu.eduSigned-off-by:
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Jan Harkes authored
Probably safer to just show the unexpected length and debug it from the userspace side. Link: http://lkml.kernel.org/r/582ae759a4fdfa31a64c35de489fa4efabac09d6.1558117389.git.jaharkes@cs.cmu.eduSigned-off-by:
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Sam Protsenko authored
The kernel is self-contained project and can be built with bare-metal toolchain. But bare-metal toolchain doesn't define __linux__. Because of this u_quad_t type is not defined when using bare-metal toolchain and codafs build fails. This patch fixes it by defining u_quad_t type unconditionally. Link: http://lkml.kernel.org/r/3cbb40b0a57b6f9923a9d67b53473c0b691a3eaa.1558117389.git.jaharkes@cs.cmu.eduSigned-off-by:
Sam Protsenko <semen.protsenko@linaro.org> Signed-off-by:
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Jan Harkes authored
Add checks to make sure the downcall message we got from the Coda cache manager is large enough to contain the data it is supposed to have. i.e. when we get a CODA_ZAPDIR we can access &out->coda_zapdir.CodaFid. Link: http://lkml.kernel.org/r/894fb6b250add09e4e3935f14649f21284a5cb18.1558117389.git.jaharkes@cs.cmu.eduSigned-off-by:
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Zhouyang Jia authored
When fget fails, the lack of error-handling code may cause unexpected results. This patch adds error-handling code after calling fget. Link: http://lkml.kernel.org/r/2514ec03df9c33b86e56748513267a80dd8004d9.1558117389.git.jaharkes@cs.cmu.eduSigned-off-by:
Zhouyang Jia <jiazhouyang09@gmail.com> Signed-off-by:
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Mikko Rapeli authored
Only users of upc_req in kernel side fs/coda/psdev.c and fs/coda/upcall.c already include linux/coda_psdev.h. Suggested by Jan Harkes <jaharkes@cs.cmu.edu> in https://lore.kernel.org/lkml/20150531111913.GA23377@cs.cmu.edu/ Fixes these include/uapi/linux/coda_psdev.h compilation errors in userspace: linux/coda_psdev.h:12:19: error: field `uc_chain' has incomplete type struct list_head uc_chain; ^ linux/coda_psdev.h:13:2: error: unknown type name `caddr_t' caddr_t uc_data; ^ linux/coda_psdev.h:14:2: error: unknown type name `u_short' u_short uc_flags; ^ linux/coda_psdev.h:15:2: error: unknown type name `u_short' u_short uc_inSize; /* Size is at most 5000 bytes */ ^ linux/coda_psdev.h:16:2: error: unknown type name `u_short' u_short uc_outSize; ^ linux/coda_psdev.h:17:2: error: unknown type name `u_short' u_short uc_opcode; /* copied from data to save lookup */ ^ linux/coda_psdev.h:19:2: error: unknown type name `wait_queue_head_t' wait_queue_head_t uc_sleep; /* process' wait queue */ ^ Link: http://lkml.kernel.org/r/9f99f5ce6a0563d5266e6cf7aa9585aac2cae971.1558117389.git.jaharkes@cs.cmu.eduSigned-off-by:
Mikko Rapeli <mikko.rapeli@iki.fi> Signed-off-by:
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Mikko Rapeli authored
Part of a patch by Mikko Rapeli, as Arnd Bergman commented on the original patch. pid_t might differ between libc and the kernel, so the kernel interface has to use types that the kernel defines. Link: http://lkml.kernel.org/r/f374a71f4d351bc8c8b3ac18ad7765c88d806d10.1558117389.git.jaharkes@cs.cmu.eduSigned-off-by:
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Jan Harkes authored
Patch series "Coda updates". The following patch series is a collection of various fixes for Coda, most of which were collected from linux-fsdevel or linux-kernel but which have as yet not found their way upstream. This patch (of 22): Various file systems expect that vma->vm_file points at their own file handle, several use file_inode(vma->vm_file) to get at their inode or use vma->vm_file->private_data. However the way Coda wrapped mmap on a host file broke this assumption, vm_file was still pointing at the Coda file and the host file systems would scribble over Coda's inode and private file data. This patch fixes the incorrect expectation and wraps vm_ops->open and vm_ops->close to allow Coda to track when the vm_area_struct is destroyed so we still release the reference on the Coda file handle at the right time. Link: http://lkml.kernel.org/r/0e850c6e59c0b147dc2dcd51a3af004c948c3697.1558117389.git.jaharkes@cs.cmu.eduSigned-off-by:
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Anshuman Khandual authored
Architectures which support kprobes have very similar boilerplate around calling kprobe_fault_handler(). Use a helper function in kprobes.h to unify them, based on the x86 code. This changes the behaviour for other architectures when preemption is enabled. Previously, they would have disabled preemption while calling the kprobe handler. However, preemption would be disabled if this fault was due to a kprobe, so we know the fault was not due to a kprobe handler and can simply return failure. This behaviour was introduced in commit a980c0ef ("x86/kprobes: Refactor kprobes_fault() like kprobe_exceptions_notify()") [anshuman.khandual@arm.com: export kprobe_fault_handler()] Link: http://lkml.kernel.org/r/1561133358-8876-1-git-send-email-anshuman.khandual@arm.com Link: http://lkml.kernel.org/r/1560420444-25737-1-git-send-email-anshuman.khandual@arm.comSigned-off-by:
Anshuman Khandual <anshuman.khandual@arm.com> Reviewed-by:
Dave Hansen <dave.hansen@linux.intel.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Christophe Leroy <christophe.leroy@c-s.fr> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Andrey Konovalov <andreyknvl@google.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Paul Mackerras <paulus@samba.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: "David S. Miller" <davem@davemloft.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: James Hogan <jhogan@kernel.org> Cc: Paul Burton <paul.burton@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Signed-off-by:
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Kees Cook authored
This fixes a couple typos I noticed in the slab Kconfig: sacrifies -> sacrifices accellerate -> accelerate Seeing as no other instances of these typos are found elsewhere in the kernel and that I originally added one of the two, I can only assume working on slab must have caused damage to the spelling centers of my brain. Link: http://lkml.kernel.org/r/201905292203.CD000546EB@keescookSigned-off-by:
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Alexey Dobriyan authored
"passed_fileno" variable was deleted 11 years ago in 2.6.25. Link: http://lkml.kernel.org/r/20190529201747.GA23248@avx2 Fixes: d20894a2 ("Remove a.out interpreter support in ELF loader") Signed-off-by:
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