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minix/servers/avfs/table.c

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Merge AVFS and APFS
2011-08-17 15:23:45 +02:00
/* This file contains the table used to map system call numbers onto the
* routines that perform them.
*/
#define _TABLE
#include "fs.h"
#include <minix/callnr.h>
#include <minix/com.h>
#include "file.h"
#include "fproc.h"
#include "lock.h"
AVFS: Use scratchpad instead of m_in to pass around file descriptors Some code relies on having the file descriptor in m_in.fd. Consequently, m_in is not only used to provide syscall parameters from user space to VFS, but also as a global variable to store temporary data within VFS. This has the ugly side effect that m_in gets overwritten during core dumping.* To work around this problem VFS now uses a so called "scratchpad" to store temporary data that has to be globally accessible. This is a simple table indexed by process number, just like fproc. The scratchpad allows us to store the buffer pointer and buffer size for suspended system calls (i.e., read, write, open, lock) instead of using fproc. This makes fproc a bit smaller and fproc iterators a bit faster. Moreover, suspension of processes becomes simpler altogether and suspended operations on pipes are now less of a special case. * This patch fixes a bug where due to unexpected m_in overwriting a coredump would fail, and consequently resources are leaked. The coredump was triggered with: $ a() { a; } $ a
2011-12-21 11:52:51 +01:00
#include "scratchpad.h"
Merge AVFS and APFS
2011-08-17 15:23:45 +02:00
#include "vnode.h"
#include "vmnt.h"
PUBLIC _PROTOTYPE (int (*call_vec[]), (void) ) = {
no_sys, /* 0 = unused */
no_sys, /* 1 = (exit) */
no_sys, /* 2 = (fork) */
do_read, /* 3 = read */
do_write, /* 4 = write */
do_open, /* 5 = open */
do_close, /* 6 = close */
no_sys, /* 7 = wait */
do_creat, /* 8 = creat */
do_link, /* 9 = link */
do_unlink, /* 10 = unlink */
no_sys, /* 11 = waitpid */
do_chdir, /* 12 = chdir */
no_sys, /* 13 = time */
do_mknod, /* 14 = mknod */
do_chmod, /* 15 = chmod */
do_chown, /* 16 = chown */
no_sys, /* 17 = break */
do_stat, /* 18 = stat (prev)*/
do_lseek, /* 19 = lseek */
no_sys, /* 20 = getpid */
do_mount, /* 21 = mount */
do_umount, /* 22 = umount */
no_sys, /* 23 = (setuid) */
no_sys, /* 24 = getuid */
no_sys, /* 25 = (stime) */
no_sys, /* 26 = ptrace */
no_sys, /* 27 = alarm */
do_fstat, /* 28 = fstat (prev)*/
no_sys, /* 29 = pause */
do_utime, /* 30 = utime */
no_sys, /* 31 = (stty) */
no_sys, /* 32 = (gtty) */
do_access, /* 33 = access */
no_sys, /* 34 = (nice) */
no_sys, /* 35 = (ftime) */
do_sync, /* 36 = sync */
no_sys, /* 37 = kill */
do_rename, /* 38 = rename */
do_mkdir, /* 39 = mkdir */
do_unlink, /* 40 = rmdir */
do_dup, /* 41 = dup */
do_pipe, /* 42 = pipe */
no_sys, /* 43 = times */
no_sys, /* 44 = (prof) */
do_slink, /* 45 = symlink */
no_sys, /* 46 = (setgid)*/
no_sys, /* 47 = getgid */
no_sys, /* 48 = (signal)*/
do_rdlink, /* 49 = readlink*/
do_lstat, /* 50 = lstat (prev)*/
no_sys, /* 51 = (acct) */
no_sys, /* 52 = (phys) */
no_sys, /* 53 = (lock) */
do_ioctl, /* 54 = ioctl */
do_fcntl, /* 55 = fcntl */
no_sys, /* 56 = (mpx) */
do_fsready, /* 57 = FS proc ready */
no_sys, /* 58 = unused */
no_sys, /* 59 = (execve)*/
do_umask, /* 60 = umask */
do_chroot, /* 61 = chroot */
no_sys, /* 62 = (setsid)*/
no_sys, /* 63 = (getpgrp)*/
no_sys, /* 64 = (itimer)*/
do_stat, /* 65 = stat */
do_fstat, /* 66 = fstat */
do_lstat, /* 67 = lstat */
no_sys, /* 68 = unused */
no_sys, /* 69 = unused */
no_sys, /* 70 = unused */
no_sys, /* 71 = (sigaction) */
no_sys, /* 72 = (sigsuspend) */
no_sys, /* 73 = (sigpending) */
no_sys, /* 74 = (sigprocmask) */
no_sys, /* 75 = (sigreturn) */
no_sys, /* 76 = (reboot) */
do_svrctl, /* 77 = svrctl */
no_sys, /* 78 = (sysuname) */
Miscellaneous legacy cleanup
2011-11-07 21:11:30 +01:00
no_sys, /* 79 = unused */
Merge AVFS and APFS
2011-08-17 15:23:45 +02:00
do_getdents, /* 80 = getdents */
do_llseek, /* 81 = llseek */
do_fstatfs, /* 82 = fstatfs */
do_statvfs, /* 83 = fstatvfs */
do_fstatvfs, /* 84 = statvfs */
do_select, /* 85 = select */
do_fchdir, /* 86 = fchdir */
do_fsync, /* 87 = fsync */
no_sys, /* 88 = (getpriority) */
no_sys, /* 89 = (setpriority) */
no_sys, /* 90 = (gettimeofday) */
no_sys, /* 91 = (seteuid) */
no_sys, /* 92 = (setegid) */
do_truncate, /* 93 = truncate */
do_ftruncate, /* 94 = truncate */
do_chmod, /* 95 = fchmod */
do_chown, /* 96 = fchown */
Miscellaneous legacy cleanup
2011-11-07 21:11:30 +01:00
no_sys, /* 97 = unused */
Merge AVFS and APFS
2011-08-17 15:23:45 +02:00
no_sys, /* 98 = (sprofile) */
no_sys, /* 99 = (cprofile) */
no_sys, /* 100 = (exec_newmem) */
no_sys, /* 101 = (srv_fork) */
no_sys, /* 102 = (exec_restart) */
Remove obsolete PROCSTAT/getsigset call.
2012-01-12 23:33:46 +01:00
no_sys, /* 103 = unused */
Merge AVFS and APFS
2011-08-17 15:23:45 +02:00
no_sys, /* 104 = (getprocnr) */
no_sys, /* 105 = unused */
no_sys, /* 106 = unused */
no_sys, /* 107 = (getepinfo) */
Cut PM out of the adddma/deldma/getdma call path
2012-01-13 00:23:04 +01:00
no_sys, /* 108 = unused */
no_sys, /* 109 = unused */
no_sys, /* 110 = unused */
Merge AVFS and APFS
2011-08-17 15:23:45 +02:00
no_sys, /* 111 = (srv_kill) */
do_gcov_flush, /* 112 = gcov_flush */
no_sys, /* 113 = (getsid) */
};
/* This should not fail with "array size is negative": */
extern int dummy[sizeof(call_vec) == NCALLS * sizeof(call_vec[0]) ? 1 : -1];
PUBLIC _PROTOTYPE (int (*pfs_call_vec[]), (void) ) = {
no_sys, /* 0 */
do_check_perms, /* 1 */
do_verify_fd, /* 2 */
do_set_filp, /* 3 */
do_copy_filp, /* 4 */
do_put_filp, /* 5 */
do_cancel_fd /* 6 */
};
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