723e51327f
The main purpose of this patch is to fix handling of unpause calls from PM while another call is ongoing. The solution to this problem sparked a full revision of the threading model, consisting of a large number of related changes: - all active worker threads are now always associated with a process, and every process has at most one active thread working for it; - the process lock is always held by a process's worker thread; - a process can now have both normal work and postponed PM work associated to it; - timer expiry and non-postponed PM work is done from the main thread; - filp garbage collection is done from a thread associated with VFS; - reboot calls from PM are now done from a thread associated with PM; - the DS events handler is protected from starting multiple threads; - support for a system worker thread has been removed; - the deadlock recovery thread has been replaced by a parameter to the worker_start() function; the number of worker threads has consequently been increased by one; - saving and restoring of global but per-thread variables is now centralized in worker_suspend() and worker_resume(); err_code is now saved and restored in all cases; - the concept of jobs has been removed, and job_m_in now points to a message stored in the worker thread structure instead; - the PM lock has been removed; - the separate exec lock has been replaced by a lock on the VM process, which was already being locked for exec calls anyway; - PM_UNPAUSE is now processed as a postponed PM request, from a thread associated with the target process; - the FP_DROP_WORK flag has been removed, since it is no longer more than just an optimization and only applied to processes operating on a pipe when getting killed; - assignment to "fp" now takes place only when obtaining new work in the main thread or a worker thread, when resuming execution of a thread, and in the special case of exiting processes during reboot; - there are no longer special cases where the yield() call is used to force a thread to run. Change-Id: I7a97b9b95c2450454a9b5318dfa0e6150d4e6858
155 lines
4.5 KiB
C
155 lines
4.5 KiB
C
/* This file contains the table used to map system call numbers onto the
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* routines that perform them.
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*/
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#define _TABLE
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#include "fs.h"
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#include <minix/callnr.h>
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#include <minix/com.h>
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#include "file.h"
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#include "lock.h"
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#include "scratchpad.h"
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#include "vnode.h"
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#include "vmnt.h"
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int (*call_vec[])(message *m_out) = {
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no_sys, /* 0 = unused */
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no_sys, /* 1 = (exit) */
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no_sys, /* 2 = (fork) */
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do_read, /* 3 = read */
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do_write, /* 4 = write */
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do_open, /* 5 = open */
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do_close, /* 6 = close */
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no_sys, /* 7 = wait */
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no_sys, /* 8 = unused */
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do_link, /* 9 = link */
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do_unlink, /* 10 = unlink */
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no_sys, /* 11 = waitpid */
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do_chdir, /* 12 = chdir */
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no_sys, /* 13 = time */
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do_mknod, /* 14 = mknod */
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do_chmod, /* 15 = chmod */
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do_chown, /* 16 = chown */
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no_sys, /* 17 = break */
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no_sys, /* 18 = unused (was old stat)*/
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no_sys, /* 19 = unused */
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no_sys, /* 20 = getpid */
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do_mount, /* 21 = mount */
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do_umount, /* 22 = umount */
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no_sys, /* 23 = (setuid) */
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no_sys, /* 24 = getuid */
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no_sys, /* 25 = (stime) */
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no_sys, /* 26 = ptrace */
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no_sys, /* 27 = alarm */
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no_sys, /* 28 = unused (was old fstat)*/
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no_sys, /* 29 = pause */
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do_utime, /* 30 = utime */
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no_sys, /* 31 = (stty) */
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no_sys, /* 32 = (gtty) */
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do_access, /* 33 = access */
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no_sys, /* 34 = (nice) */
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no_sys, /* 35 = (ftime) */
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do_sync, /* 36 = sync */
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no_sys, /* 37 = kill */
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do_rename, /* 38 = rename */
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do_mkdir, /* 39 = mkdir */
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do_unlink, /* 40 = rmdir */
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no_sys, /* 41 = unused */
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do_pipe, /* 42 = pipe */
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no_sys, /* 43 = times */
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no_sys, /* 44 = (prof) */
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do_slink, /* 45 = symlink */
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no_sys, /* 46 = (setgid)*/
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no_sys, /* 47 = getgid */
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no_sys, /* 48 = (signal)*/
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do_rdlink, /* 49 = readlink*/
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no_sys, /* 50 = unused (was old lstat)*/
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do_stat, /* 51 = stat */
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do_fstat, /* 52 = fstat */
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do_lstat, /* 53 = lstat */
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do_ioctl, /* 54 = ioctl */
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do_fcntl, /* 55 = fcntl */
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no_sys, /* 56 = (mpx) */
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do_fsready, /* 57 = FS proc ready */
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do_pipe2, /* 58 = pipe2 */
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no_sys, /* 59 = (execve)*/
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do_umask, /* 60 = umask */
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do_chroot, /* 61 = chroot */
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no_sys, /* 62 = (setsid)*/
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no_sys, /* 63 = (getpgrp)*/
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no_sys, /* 64 = (itimer)*/
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do_stat, /* 65 = stat - badly numbered, being phased out */
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do_fstat, /* 66 = fstat - badly numbered, being phased out */
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do_lstat, /* 67 = lstat - badly numbered, being phased out */
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no_sys, /* 68 = (setmcontext) */
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do_getdents, /* 69 = getdents */
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do_ftruncate, /* 70 = ftruncate */
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no_sys, /* 71 = (sigaction) */
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no_sys, /* 72 = (sigsuspend) */
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no_sys, /* 73 = (sigpending) */
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no_sys, /* 74 = (sigprocmask) */
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no_sys, /* 75 = (sigreturn) */
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no_sys, /* 76 = (reboot) */
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do_svrctl, /* 77 = svrctl */
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no_sys, /* 78 = (sysuname) */
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no_sys, /* 79 = unused */
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no_sys, /* 80 = unused */
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do_lseek, /* 81 = llseek */
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do_getvfsstat, /* 82 = getvfsstat */
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do_statvfs, /* 83 = fstatvfs */
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do_fstatvfs, /* 84 = statvfs */
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do_select, /* 85 = select */
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do_fchdir, /* 86 = fchdir */
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do_fsync, /* 87 = fsync */
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no_sys, /* 88 = (getpriority) */
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no_sys, /* 89 = (setpriority) */
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no_sys, /* 90 = (gettimeofday) */
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no_sys, /* 91 = (seteuid) */
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no_sys, /* 92 = (setegid) */
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no_sys, /* 93 = unused */
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no_sys, /* 94 = unused */
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do_chmod, /* 95 = fchmod */
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do_chown, /* 96 = fchown */
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do_lseek, /* 97 = lseek */
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no_sys, /* 98 = (sprofile) */
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no_sys, /* 99 = (cprofile) */
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no_sys, /* 100 = (newexec) */
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no_sys, /* 101 = (srv_fork) */
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no_sys, /* 102 = (exec_restart) */
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no_sys, /* 103 = unused */
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no_sys, /* 104 = (getprocnr) */
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no_sys, /* 105 = unused */
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no_sys, /* 106 = unused */
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no_sys, /* 107 = (getepinfo) */
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do_utimens, /* 108 = utimens */
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do_fcntl, /* 109 = fcntl */
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do_truncate, /* 110 = unused */
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no_sys, /* 111 = (srv_kill) */
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do_gcov_flush, /* 112 = gcov_flush */
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no_sys, /* 113 = (getsid) */
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no_sys, /* 114 = (clock_getres) */
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no_sys, /* 115 = (clock_gettime) */
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no_sys, /* 116 = (clock_settime) */
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do_vm_call, /* 117 = call from vm */
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no_sys, /* 118 = unsused */
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no_sys, /* 119 = unsused */
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no_sys, /* 120 = unsused */
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no_sys, /* 121 = (task reply) */
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no_sys, /* 122 = (map driver ) */
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do_getrusage, /* 123 = getrusage */
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};
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/* This should not fail with "array size is negative": */
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extern int dummy[sizeof(call_vec) == NCALLS * sizeof(call_vec[0]) ? 1 : -1];
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int (*pfs_call_vec[])(message *m_out) = {
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no_sys, /* 0 */
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do_check_perms, /* 1 */
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do_verify_fd, /* 2 */
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do_set_filp, /* 3 */
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do_copy_filp, /* 4 */
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do_put_filp, /* 5 */
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do_cancel_fd /* 6 */
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};
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