diff options
Diffstat (limited to 'sys/compat/linux/linux_misc.c')
| -rw-r--r-- | sys/compat/linux/linux_misc.c | 1923 |
1 files changed, 1923 insertions, 0 deletions
diff --git a/sys/compat/linux/linux_misc.c b/sys/compat/linux/linux_misc.c new file mode 100644 index 0000000..7b261d6 --- /dev/null +++ b/sys/compat/linux/linux_misc.c @@ -0,0 +1,1923 @@ +/*- + * Copyright (c) 2002 Doug Rabson + * Copyright (c) 1994-1995 Søren Schmidt + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer + * in this position and unchanged. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include "opt_compat.h" + +#include <sys/param.h> +#include <sys/blist.h> +#include <sys/fcntl.h> +#if defined(__i386__) +#include <sys/imgact_aout.h> +#endif +#include <sys/jail.h> +#include <sys/kernel.h> +#include <sys/limits.h> +#include <sys/lock.h> +#include <sys/malloc.h> +#include <sys/mman.h> +#include <sys/mount.h> +#include <sys/mutex.h> +#include <sys/namei.h> +#include <sys/priv.h> +#include <sys/proc.h> +#include <sys/reboot.h> +#include <sys/resourcevar.h> +#include <sys/sched.h> +#include <sys/signalvar.h> +#include <sys/stat.h> +#include <sys/syscallsubr.h> +#include <sys/sysctl.h> +#include <sys/sysproto.h> +#include <sys/systm.h> +#include <sys/time.h> +#include <sys/vmmeter.h> +#include <sys/vnode.h> +#include <sys/wait.h> +#include <sys/cpuset.h> + +#include <security/mac/mac_framework.h> + +#include <vm/vm.h> +#include <vm/pmap.h> +#include <vm/vm_kern.h> +#include <vm/vm_map.h> +#include <vm/vm_extern.h> +#include <vm/vm_object.h> +#include <vm/swap_pager.h> + +#ifdef COMPAT_LINUX32 +#include <machine/../linux32/linux.h> +#include <machine/../linux32/linux32_proto.h> +#else +#include <machine/../linux/linux.h> +#include <machine/../linux/linux_proto.h> +#endif + +#include <compat/linux/linux_file.h> +#include <compat/linux/linux_mib.h> +#include <compat/linux/linux_signal.h> +#include <compat/linux/linux_util.h> +#include <compat/linux/linux_sysproto.h> +#include <compat/linux/linux_emul.h> +#include <compat/linux/linux_misc.h> + +int stclohz; /* Statistics clock frequency */ + +static unsigned int linux_to_bsd_resource[LINUX_RLIM_NLIMITS] = { + RLIMIT_CPU, RLIMIT_FSIZE, RLIMIT_DATA, RLIMIT_STACK, + RLIMIT_CORE, RLIMIT_RSS, RLIMIT_NPROC, RLIMIT_NOFILE, + RLIMIT_MEMLOCK, RLIMIT_AS +}; + +struct l_sysinfo { + l_long uptime; /* Seconds since boot */ + l_ulong loads[3]; /* 1, 5, and 15 minute load averages */ +#define LINUX_SYSINFO_LOADS_SCALE 65536 + l_ulong totalram; /* Total usable main memory size */ + l_ulong freeram; /* Available memory size */ + l_ulong sharedram; /* Amount of shared memory */ + l_ulong bufferram; /* Memory used by buffers */ + l_ulong totalswap; /* Total swap space size */ + l_ulong freeswap; /* swap space still available */ + l_ushort procs; /* Number of current processes */ + l_ushort pads; + l_ulong totalbig; + l_ulong freebig; + l_uint mem_unit; + char _f[20-2*sizeof(l_long)-sizeof(l_int)]; /* padding */ +}; +int +linux_sysinfo(struct thread *td, struct linux_sysinfo_args *args) +{ + struct l_sysinfo sysinfo; + vm_object_t object; + int i, j; + struct timespec ts; + + getnanouptime(&ts); + if (ts.tv_nsec != 0) + ts.tv_sec++; + sysinfo.uptime = ts.tv_sec; + + /* Use the information from the mib to get our load averages */ + for (i = 0; i < 3; i++) + sysinfo.loads[i] = averunnable.ldavg[i] * + LINUX_SYSINFO_LOADS_SCALE / averunnable.fscale; + + sysinfo.totalram = physmem * PAGE_SIZE; + sysinfo.freeram = sysinfo.totalram - cnt.v_wire_count * PAGE_SIZE; + + sysinfo.sharedram = 0; + mtx_lock(&vm_object_list_mtx); + TAILQ_FOREACH(object, &vm_object_list, object_list) + if (object->shadow_count > 1) + sysinfo.sharedram += object->resident_page_count; + mtx_unlock(&vm_object_list_mtx); + + sysinfo.sharedram *= PAGE_SIZE; + sysinfo.bufferram = 0; + + swap_pager_status(&i, &j); + sysinfo.totalswap = i * PAGE_SIZE; + sysinfo.freeswap = (i - j) * PAGE_SIZE; + + sysinfo.procs = nprocs; + + /* The following are only present in newer Linux kernels. */ + sysinfo.totalbig = 0; + sysinfo.freebig = 0; + sysinfo.mem_unit = 1; + + return (copyout(&sysinfo, args->info, sizeof(sysinfo))); +} + +int +linux_alarm(struct thread *td, struct linux_alarm_args *args) +{ + struct itimerval it, old_it; + u_int secs; + int error; + +#ifdef DEBUG + if (ldebug(alarm)) + printf(ARGS(alarm, "%u"), args->secs); +#endif + + secs = args->secs; + + if (secs > INT_MAX) + secs = INT_MAX; + + it.it_value.tv_sec = (long) secs; + it.it_value.tv_usec = 0; + it.it_interval.tv_sec = 0; + it.it_interval.tv_usec = 0; + error = kern_setitimer(td, ITIMER_REAL, &it, &old_it); + if (error) + return (error); + if (timevalisset(&old_it.it_value)) { + if (old_it.it_value.tv_usec != 0) + old_it.it_value.tv_sec++; + td->td_retval[0] = old_it.it_value.tv_sec; + } + return (0); +} + +int +linux_brk(struct thread *td, struct linux_brk_args *args) +{ + struct vmspace *vm = td->td_proc->p_vmspace; + vm_offset_t new, old; + struct obreak_args /* { + char * nsize; + } */ tmp; + +#ifdef DEBUG + if (ldebug(brk)) + printf(ARGS(brk, "%p"), (void *)(uintptr_t)args->dsend); +#endif + old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize); + new = (vm_offset_t)args->dsend; + tmp.nsize = (char *)new; + if (((caddr_t)new > vm->vm_daddr) && !obreak(td, &tmp)) + td->td_retval[0] = (long)new; + else + td->td_retval[0] = (long)old; + + return (0); +} + +#if defined(__i386__) +/* XXX: what about amd64/linux32? */ + +int +linux_uselib(struct thread *td, struct linux_uselib_args *args) +{ + struct nameidata ni; + struct vnode *vp; + struct exec *a_out; + struct vattr attr; + vm_offset_t vmaddr; + unsigned long file_offset; + vm_offset_t buffer; + unsigned long bss_size; + char *library; + int error; + int locked, vfslocked; + + LCONVPATHEXIST(td, args->library, &library); + +#ifdef DEBUG + if (ldebug(uselib)) + printf(ARGS(uselib, "%s"), library); +#endif + + a_out = NULL; + vfslocked = 0; + locked = 0; + vp = NULL; + + NDINIT(&ni, LOOKUP, ISOPEN | FOLLOW | LOCKLEAF | MPSAFE | AUDITVNODE1, + UIO_SYSSPACE, library, td); + error = namei(&ni); + LFREEPATH(library); + if (error) + goto cleanup; + + vp = ni.ni_vp; + vfslocked = NDHASGIANT(&ni); + NDFREE(&ni, NDF_ONLY_PNBUF); + + /* + * From here on down, we have a locked vnode that must be unlocked. + * XXX: The code below largely duplicates exec_check_permissions(). + */ + locked = 1; + + /* Writable? */ + if (vp->v_writecount) { + error = ETXTBSY; + goto cleanup; + } + + /* Executable? */ + error = VOP_GETATTR(vp, &attr, td->td_ucred); + if (error) + goto cleanup; + + if ((vp->v_mount->mnt_flag & MNT_NOEXEC) || + ((attr.va_mode & 0111) == 0) || (attr.va_type != VREG)) { + /* EACCESS is what exec(2) returns. */ + error = ENOEXEC; + goto cleanup; + } + + /* Sensible size? */ + if (attr.va_size == 0) { + error = ENOEXEC; + goto cleanup; + } + + /* Can we access it? */ + error = VOP_ACCESS(vp, VEXEC, td->td_ucred, td); + if (error) + goto cleanup; + + /* + * XXX: This should use vn_open() so that it is properly authorized, + * and to reduce code redundancy all over the place here. + * XXX: Not really, it duplicates far more of exec_check_permissions() + * than vn_open(). + */ +#ifdef MAC + error = mac_vnode_check_open(td->td_ucred, vp, VREAD); + if (error) + goto cleanup; +#endif + error = VOP_OPEN(vp, FREAD, td->td_ucred, td, NULL); + if (error) + goto cleanup; + + /* Pull in executable header into kernel_map */ + error = vm_mmap(kernel_map, (vm_offset_t *)&a_out, PAGE_SIZE, + VM_PROT_READ, VM_PROT_READ, 0, OBJT_VNODE, vp, 0); + if (error) + goto cleanup; + + /* Is it a Linux binary ? */ + if (((a_out->a_magic >> 16) & 0xff) != 0x64) { + error = ENOEXEC; + goto cleanup; + } + + /* + * While we are here, we should REALLY do some more checks + */ + + /* Set file/virtual offset based on a.out variant. */ + switch ((int)(a_out->a_magic & 0xffff)) { + case 0413: /* ZMAGIC */ + file_offset = 1024; + break; + case 0314: /* QMAGIC */ + file_offset = 0; + break; + default: + error = ENOEXEC; + goto cleanup; + } + + bss_size = round_page(a_out->a_bss); + + /* Check various fields in header for validity/bounds. */ + if (a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK) { + error = ENOEXEC; + goto cleanup; + } + + /* text + data can't exceed file size */ + if (a_out->a_data + a_out->a_text > attr.va_size) { + error = EFAULT; + goto cleanup; + } + + /* + * text/data/bss must not exceed limits + * XXX - this is not complete. it should check current usage PLUS + * the resources needed by this library. + */ + PROC_LOCK(td->td_proc); + if (a_out->a_text > maxtsiz || + a_out->a_data + bss_size > lim_cur(td->td_proc, RLIMIT_DATA)) { + PROC_UNLOCK(td->td_proc); + error = ENOMEM; + goto cleanup; + } + PROC_UNLOCK(td->td_proc); + + /* + * Prevent more writers. + * XXX: Note that if any of the VM operations fail below we don't + * clear this flag. + */ + vp->v_vflag |= VV_TEXT; + + /* + * Lock no longer needed + */ + locked = 0; + VOP_UNLOCK(vp, 0); + VFS_UNLOCK_GIANT(vfslocked); + + /* + * Check if file_offset page aligned. Currently we cannot handle + * misalinged file offsets, and so we read in the entire image + * (what a waste). + */ + if (file_offset & PAGE_MASK) { +#ifdef DEBUG + printf("uselib: Non page aligned binary %lu\n", file_offset); +#endif + /* Map text+data read/write/execute */ + + /* a_entry is the load address and is page aligned */ + vmaddr = trunc_page(a_out->a_entry); + + /* get anon user mapping, read+write+execute */ + error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, + &vmaddr, a_out->a_text + a_out->a_data, FALSE, VM_PROT_ALL, + VM_PROT_ALL, 0); + if (error) + goto cleanup; + + /* map file into kernel_map */ + error = vm_mmap(kernel_map, &buffer, + round_page(a_out->a_text + a_out->a_data + file_offset), + VM_PROT_READ, VM_PROT_READ, 0, OBJT_VNODE, vp, + trunc_page(file_offset)); + if (error) + goto cleanup; + + /* copy from kernel VM space to user space */ + error = copyout(PTRIN(buffer + file_offset), + (void *)vmaddr, a_out->a_text + a_out->a_data); + + /* release temporary kernel space */ + vm_map_remove(kernel_map, buffer, buffer + + round_page(a_out->a_text + a_out->a_data + file_offset)); + + if (error) + goto cleanup; + } else { +#ifdef DEBUG + printf("uselib: Page aligned binary %lu\n", file_offset); +#endif + /* + * for QMAGIC, a_entry is 20 bytes beyond the load address + * to skip the executable header + */ + vmaddr = trunc_page(a_out->a_entry); + + /* + * Map it all into the process's space as a single + * copy-on-write "data" segment. + */ + error = vm_mmap(&td->td_proc->p_vmspace->vm_map, &vmaddr, + a_out->a_text + a_out->a_data, VM_PROT_ALL, VM_PROT_ALL, + MAP_PRIVATE | MAP_FIXED, OBJT_VNODE, vp, file_offset); + if (error) + goto cleanup; + } +#ifdef DEBUG + printf("mem=%08lx = %08lx %08lx\n", (long)vmaddr, ((long *)vmaddr)[0], + ((long *)vmaddr)[1]); +#endif + if (bss_size != 0) { + /* Calculate BSS start address */ + vmaddr = trunc_page(a_out->a_entry) + a_out->a_text + + a_out->a_data; + + /* allocate some 'anon' space */ + error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, + &vmaddr, bss_size, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0); + if (error) + goto cleanup; + } + +cleanup: + /* Unlock vnode if needed */ + if (locked) { + VOP_UNLOCK(vp, 0); + VFS_UNLOCK_GIANT(vfslocked); + } + + /* Release the kernel mapping. */ + if (a_out) + vm_map_remove(kernel_map, (vm_offset_t)a_out, + (vm_offset_t)a_out + PAGE_SIZE); + + return (error); +} + +#endif /* __i386__ */ + +int +linux_select(struct thread *td, struct linux_select_args *args) +{ + l_timeval ltv; + struct timeval tv0, tv1, utv, *tvp; + int error; + +#ifdef DEBUG + if (ldebug(select)) + printf(ARGS(select, "%d, %p, %p, %p, %p"), args->nfds, + (void *)args->readfds, (void *)args->writefds, + (void *)args->exceptfds, (void *)args->timeout); +#endif + + /* + * Store current time for computation of the amount of + * time left. + */ + if (args->timeout) { + if ((error = copyin(args->timeout, <v, sizeof(ltv)))) + goto select_out; + utv.tv_sec = ltv.tv_sec; + utv.tv_usec = ltv.tv_usec; +#ifdef DEBUG + if (ldebug(select)) + printf(LMSG("incoming timeout (%jd/%ld)"), + (intmax_t)utv.tv_sec, utv.tv_usec); +#endif + + if (itimerfix(&utv)) { + /* + * The timeval was invalid. Convert it to something + * valid that will act as it does under Linux. + */ + utv.tv_sec += utv.tv_usec / 1000000; + utv.tv_usec %= 1000000; + if (utv.tv_usec < 0) { + utv.tv_sec -= 1; + utv.tv_usec += 1000000; + } + if (utv.tv_sec < 0) + timevalclear(&utv); + } + microtime(&tv0); + tvp = &utv; + } else + tvp = NULL; + + error = kern_select(td, args->nfds, args->readfds, args->writefds, + args->exceptfds, tvp, sizeof(l_int) * 8); + +#ifdef DEBUG + if (ldebug(select)) + printf(LMSG("real select returns %d"), error); +#endif + if (error) + goto select_out; + + if (args->timeout) { + if (td->td_retval[0]) { + /* + * Compute how much time was left of the timeout, + * by subtracting the current time and the time + * before we started the call, and subtracting + * that result from the user-supplied value. + */ + microtime(&tv1); + timevalsub(&tv1, &tv0); + timevalsub(&utv, &tv1); + if (utv.tv_sec < 0) + timevalclear(&utv); + } else + timevalclear(&utv); +#ifdef DEBUG + if (ldebug(select)) + printf(LMSG("outgoing timeout (%jd/%ld)"), + (intmax_t)utv.tv_sec, utv.tv_usec); +#endif + ltv.tv_sec = utv.tv_sec; + ltv.tv_usec = utv.tv_usec; + if ((error = copyout(<v, args->timeout, sizeof(ltv)))) + goto select_out; + } + +select_out: +#ifdef DEBUG + if (ldebug(select)) + printf(LMSG("select_out -> %d"), error); +#endif + return (error); +} + +int +linux_mremap(struct thread *td, struct linux_mremap_args *args) +{ + struct munmap_args /* { + void *addr; + size_t len; + } */ bsd_args; + int error = 0; + +#ifdef DEBUG + if (ldebug(mremap)) + printf(ARGS(mremap, "%p, %08lx, %08lx, %08lx"), + (void *)(uintptr_t)args->addr, + (unsigned long)args->old_len, + (unsigned long)args->new_len, + (unsigned long)args->flags); +#endif + + if (args->flags & ~(LINUX_MREMAP_FIXED | LINUX_MREMAP_MAYMOVE)) { + td->td_retval[0] = 0; + return (EINVAL); + } + + /* + * Check for the page alignment. + * Linux defines PAGE_MASK to be FreeBSD ~PAGE_MASK. + */ + if (args->addr & PAGE_MASK) { + td->td_retval[0] = 0; + return (EINVAL); + } + + args->new_len = round_page(args->new_len); + args->old_len = round_page(args->old_len); + + if (args->new_len > args->old_len) { + td->td_retval[0] = 0; + return (ENOMEM); + } + + if (args->new_len < args->old_len) { + bsd_args.addr = + (caddr_t)((uintptr_t)args->addr + args->new_len); + bsd_args.len = args->old_len - args->new_len; + error = munmap(td, &bsd_args); + } + + td->td_retval[0] = error ? 0 : (uintptr_t)args->addr; + return (error); +} + +#define LINUX_MS_ASYNC 0x0001 +#define LINUX_MS_INVALIDATE 0x0002 +#define LINUX_MS_SYNC 0x0004 + +int +linux_msync(struct thread *td, struct linux_msync_args *args) +{ + struct msync_args bsd_args; + + bsd_args.addr = (caddr_t)(uintptr_t)args->addr; + bsd_args.len = (uintptr_t)args->len; + bsd_args.flags = args->fl & ~LINUX_MS_SYNC; + + return (msync(td, &bsd_args)); +} + +int +linux_time(struct thread *td, struct linux_time_args *args) +{ + struct timeval tv; + l_time_t tm; + int error; + +#ifdef DEBUG + if (ldebug(time)) + printf(ARGS(time, "*")); +#endif + + microtime(&tv); + tm = tv.tv_sec; + if (args->tm && (error = copyout(&tm, args->tm, sizeof(tm)))) + return (error); + td->td_retval[0] = tm; + return (0); +} + +struct l_times_argv { + l_clock_t tms_utime; + l_clock_t tms_stime; + l_clock_t tms_cutime; + l_clock_t tms_cstime; +}; + + +/* + * Glibc versions prior to 2.2.1 always use hard-coded CLK_TCK value. + * Since 2.2.1 Glibc uses value exported from kernel via AT_CLKTCK + * auxiliary vector entry. + */ +#define CLK_TCK 100 + +#define CONVOTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK)) +#define CONVNTCK(r) (r.tv_sec * stclohz + r.tv_usec / (1000000 / stclohz)) + +#define CONVTCK(r) (linux_kernver(td) >= LINUX_KERNVER_2004000 ? \ + CONVNTCK(r) : CONVOTCK(r)) + +int +linux_times(struct thread *td, struct linux_times_args *args) +{ + struct timeval tv, utime, stime, cutime, cstime; + struct l_times_argv tms; + struct proc *p; + int error; + +#ifdef DEBUG + if (ldebug(times)) + printf(ARGS(times, "*")); +#endif + + if (args->buf != NULL) { + p = td->td_proc; + PROC_LOCK(p); + PROC_SLOCK(p); + calcru(p, &utime, &stime); + PROC_SUNLOCK(p); + calccru(p, &cutime, &cstime); + PROC_UNLOCK(p); + + tms.tms_utime = CONVTCK(utime); + tms.tms_stime = CONVTCK(stime); + + tms.tms_cutime = CONVTCK(cutime); + tms.tms_cstime = CONVTCK(cstime); + + if ((error = copyout(&tms, args->buf, sizeof(tms)))) + return (error); + } + + microuptime(&tv); + td->td_retval[0] = (int)CONVTCK(tv); + return (0); +} + +int +linux_newuname(struct thread *td, struct linux_newuname_args *args) +{ + struct l_new_utsname utsname; + char osname[LINUX_MAX_UTSNAME]; + char osrelease[LINUX_MAX_UTSNAME]; + char *p; + +#ifdef DEBUG + if (ldebug(newuname)) + printf(ARGS(newuname, "*")); +#endif + + linux_get_osname(td, osname); + linux_get_osrelease(td, osrelease); + + bzero(&utsname, sizeof(utsname)); + strlcpy(utsname.sysname, osname, LINUX_MAX_UTSNAME); + getcredhostname(td->td_ucred, utsname.nodename, LINUX_MAX_UTSNAME); + getcreddomainname(td->td_ucred, utsname.domainname, LINUX_MAX_UTSNAME); + strlcpy(utsname.release, osrelease, LINUX_MAX_UTSNAME); + strlcpy(utsname.version, version, LINUX_MAX_UTSNAME); + for (p = utsname.version; *p != '\0'; ++p) + if (*p == '\n') { + *p = '\0'; + break; + } + strlcpy(utsname.machine, linux_platform, LINUX_MAX_UTSNAME); + + return (copyout(&utsname, args->buf, sizeof(utsname))); +} + +#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) +struct l_utimbuf { + l_time_t l_actime; + l_time_t l_modtime; +}; + +int +linux_utime(struct thread *td, struct linux_utime_args *args) +{ + struct timeval tv[2], *tvp; + struct l_utimbuf lut; + char *fname; + int error; + + LCONVPATHEXIST(td, args->fname, &fname); + +#ifdef DEBUG + if (ldebug(utime)) + printf(ARGS(utime, "%s, *"), fname); +#endif + + if (args->times) { + if ((error = copyin(args->times, &lut, sizeof lut))) { + LFREEPATH(fname); + return (error); + } + tv[0].tv_sec = lut.l_actime; + tv[0].tv_usec = 0; + tv[1].tv_sec = lut.l_modtime; + tv[1].tv_usec = 0; + tvp = tv; + } else + tvp = NULL; + + error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); + LFREEPATH(fname); + return (error); +} + +int +linux_utimes(struct thread *td, struct linux_utimes_args *args) +{ + l_timeval ltv[2]; + struct timeval tv[2], *tvp = NULL; + char *fname; + int error; + + LCONVPATHEXIST(td, args->fname, &fname); + +#ifdef DEBUG + if (ldebug(utimes)) + printf(ARGS(utimes, "%s, *"), fname); +#endif + + if (args->tptr != NULL) { + if ((error = copyin(args->tptr, ltv, sizeof ltv))) { + LFREEPATH(fname); + return (error); + } + tv[0].tv_sec = ltv[0].tv_sec; + tv[0].tv_usec = ltv[0].tv_usec; + tv[1].tv_sec = ltv[1].tv_sec; + tv[1].tv_usec = ltv[1].tv_usec; + tvp = tv; + } + + error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); + LFREEPATH(fname); + return (error); +} + +int +linux_futimesat(struct thread *td, struct linux_futimesat_args *args) +{ + l_timeval ltv[2]; + struct timeval tv[2], *tvp = NULL; + char *fname; + int error, dfd; + + dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; + LCONVPATHEXIST_AT(td, args->filename, &fname, dfd); + +#ifdef DEBUG + if (ldebug(futimesat)) + printf(ARGS(futimesat, "%s, *"), fname); +#endif + + if (args->utimes != NULL) { + if ((error = copyin(args->utimes, ltv, sizeof ltv))) { + LFREEPATH(fname); + return (error); + } + tv[0].tv_sec = ltv[0].tv_sec; + tv[0].tv_usec = ltv[0].tv_usec; + tv[1].tv_sec = ltv[1].tv_sec; + tv[1].tv_usec = ltv[1].tv_usec; + tvp = tv; + } + + error = kern_utimesat(td, dfd, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); + LFREEPATH(fname); + return (error); +} +#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ + +int +linux_common_wait(struct thread *td, int pid, int *status, + int options, struct rusage *ru) +{ + int error, tmpstat; + + error = kern_wait(td, pid, &tmpstat, options, ru); + if (error) + return (error); + + if (status) { + tmpstat &= 0xffff; + if (WIFSIGNALED(tmpstat)) + tmpstat = (tmpstat & 0xffffff80) | + BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat)); + else if (WIFSTOPPED(tmpstat)) + tmpstat = (tmpstat & 0xffff00ff) | + (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8); + error = copyout(&tmpstat, status, sizeof(int)); + } + + return (error); +} + +int +linux_waitpid(struct thread *td, struct linux_waitpid_args *args) +{ + int options; + +#ifdef DEBUG + if (ldebug(waitpid)) + printf(ARGS(waitpid, "%d, %p, %d"), + args->pid, (void *)args->status, args->options); +#endif + /* + * this is necessary because the test in kern_wait doesn't work + * because we mess with the options here + */ + if (args->options & ~(WUNTRACED | WNOHANG | WCONTINUED | __WCLONE)) + return (EINVAL); + + options = (args->options & (WNOHANG | WUNTRACED)); + /* WLINUXCLONE should be equal to __WCLONE, but we make sure */ + if (args->options & __WCLONE) + options |= WLINUXCLONE; + + return (linux_common_wait(td, args->pid, args->status, options, NULL)); +} + + +int +linux_mknod(struct thread *td, struct linux_mknod_args *args) +{ + char *path; + int error; + + LCONVPATHCREAT(td, args->path, &path); + +#ifdef DEBUG + if (ldebug(mknod)) + printf(ARGS(mknod, "%s, %d, %d"), path, args->mode, args->dev); +#endif + + switch (args->mode & S_IFMT) { + case S_IFIFO: + case S_IFSOCK: + error = kern_mkfifo(td, path, UIO_SYSSPACE, args->mode); + break; + + case S_IFCHR: + case S_IFBLK: + error = kern_mknod(td, path, UIO_SYSSPACE, args->mode, + args->dev); + break; + + case S_IFDIR: + error = EPERM; + break; + + case 0: + args->mode |= S_IFREG; + /* FALLTHROUGH */ + case S_IFREG: + error = kern_open(td, path, UIO_SYSSPACE, + O_WRONLY | O_CREAT | O_TRUNC, args->mode); + if (error == 0) + kern_close(td, td->td_retval[0]); + break; + + default: + error = EINVAL; + break; + } + LFREEPATH(path); + return (error); +} + +int +linux_mknodat(struct thread *td, struct linux_mknodat_args *args) +{ + char *path; + int error, dfd; + + dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; + LCONVPATHCREAT_AT(td, args->filename, &path, dfd); + +#ifdef DEBUG + if (ldebug(mknodat)) + printf(ARGS(mknodat, "%s, %d, %d"), path, args->mode, args->dev); +#endif + + switch (args->mode & S_IFMT) { + case S_IFIFO: + case S_IFSOCK: + error = kern_mkfifoat(td, dfd, path, UIO_SYSSPACE, args->mode); + break; + + case S_IFCHR: + case S_IFBLK: + error = kern_mknodat(td, dfd, path, UIO_SYSSPACE, args->mode, + args->dev); + break; + + case S_IFDIR: + error = EPERM; + break; + + case 0: + args->mode |= S_IFREG; + /* FALLTHROUGH */ + case S_IFREG: + error = kern_openat(td, dfd, path, UIO_SYSSPACE, + O_WRONLY | O_CREAT | O_TRUNC, args->mode); + if (error == 0) + kern_close(td, td->td_retval[0]); + break; + + default: + error = EINVAL; + break; + } + LFREEPATH(path); + return (error); +} + +/* + * UGH! This is just about the dumbest idea I've ever heard!! + */ +int +linux_personality(struct thread *td, struct linux_personality_args *args) +{ +#ifdef DEBUG + if (ldebug(personality)) + printf(ARGS(personality, "%lu"), (unsigned long)args->per); +#endif + if (args->per != 0) + return (EINVAL); + + /* Yes Jim, it's still a Linux... */ + td->td_retval[0] = 0; + return (0); +} + +struct l_itimerval { + l_timeval it_interval; + l_timeval it_value; +}; + +#define B2L_ITIMERVAL(bip, lip) \ + (bip)->it_interval.tv_sec = (lip)->it_interval.tv_sec; \ + (bip)->it_interval.tv_usec = (lip)->it_interval.tv_usec; \ + (bip)->it_value.tv_sec = (lip)->it_value.tv_sec; \ + (bip)->it_value.tv_usec = (lip)->it_value.tv_usec; + +int +linux_setitimer(struct thread *td, struct linux_setitimer_args *uap) +{ + int error; + struct l_itimerval ls; + struct itimerval aitv, oitv; + +#ifdef DEBUG + if (ldebug(setitimer)) + printf(ARGS(setitimer, "%p, %p"), + (void *)uap->itv, (void *)uap->oitv); +#endif + + if (uap->itv == NULL) { + uap->itv = uap->oitv; + return (linux_getitimer(td, (struct linux_getitimer_args *)uap)); + } + + error = copyin(uap->itv, &ls, sizeof(ls)); + if (error != 0) + return (error); + B2L_ITIMERVAL(&aitv, &ls); +#ifdef DEBUG + if (ldebug(setitimer)) { + printf("setitimer: value: sec: %jd, usec: %ld\n", + (intmax_t)aitv.it_value.tv_sec, aitv.it_value.tv_usec); + printf("setitimer: interval: sec: %jd, usec: %ld\n", + (intmax_t)aitv.it_interval.tv_sec, aitv.it_interval.tv_usec); + } +#endif + error = kern_setitimer(td, uap->which, &aitv, &oitv); + if (error != 0 || uap->oitv == NULL) + return (error); + B2L_ITIMERVAL(&ls, &oitv); + + return (copyout(&ls, uap->oitv, sizeof(ls))); +} + +int +linux_getitimer(struct thread *td, struct linux_getitimer_args *uap) +{ + int error; + struct l_itimerval ls; + struct itimerval aitv; + +#ifdef DEBUG + if (ldebug(getitimer)) + printf(ARGS(getitimer, "%p"), (void *)uap->itv); +#endif + error = kern_getitimer(td, uap->which, &aitv); + if (error != 0) + return (error); + B2L_ITIMERVAL(&ls, &aitv); + return (copyout(&ls, uap->itv, sizeof(ls))); +} + +int +linux_nice(struct thread *td, struct linux_nice_args *args) +{ + struct setpriority_args bsd_args; + + bsd_args.which = PRIO_PROCESS; + bsd_args.who = 0; /* current process */ + bsd_args.prio = args->inc; + return (setpriority(td, &bsd_args)); +} + +int +linux_setgroups(struct thread *td, struct linux_setgroups_args *args) +{ + struct ucred *newcred, *oldcred; + l_gid_t *linux_gidset; + gid_t *bsd_gidset; + int ngrp, error; + struct proc *p; + + ngrp = args->gidsetsize; + if (ngrp < 0 || ngrp >= ngroups_max + 1) + return (EINVAL); + linux_gidset = malloc(ngrp * sizeof(*linux_gidset), M_TEMP, M_WAITOK); + error = copyin(args->grouplist, linux_gidset, ngrp * sizeof(l_gid_t)); + if (error) + goto out; + newcred = crget(); + p = td->td_proc; + PROC_LOCK(p); + oldcred = crcopysafe(p, newcred); + + /* + * cr_groups[0] holds egid. Setting the whole set from + * the supplied set will cause egid to be changed too. + * Keep cr_groups[0] unchanged to prevent that. + */ + + if ((error = priv_check_cred(oldcred, PRIV_CRED_SETGROUPS, 0)) != 0) { + PROC_UNLOCK(p); + crfree(newcred); + goto out; + } + + if (ngrp > 0) { + newcred->cr_ngroups = ngrp + 1; + + bsd_gidset = newcred->cr_groups; + ngrp--; + while (ngrp >= 0) { + bsd_gidset[ngrp + 1] = linux_gidset[ngrp]; + ngrp--; + } + } else + newcred->cr_ngroups = 1; + + setsugid(p); + p->p_ucred = newcred; + PROC_UNLOCK(p); + crfree(oldcred); + error = 0; +out: + free(linux_gidset, M_TEMP); + return (error); +} + +int +linux_getgroups(struct thread *td, struct linux_getgroups_args *args) +{ + struct ucred *cred; + l_gid_t *linux_gidset; + gid_t *bsd_gidset; + int bsd_gidsetsz, ngrp, error; + + cred = td->td_ucred; + bsd_gidset = cred->cr_groups; + bsd_gidsetsz = cred->cr_ngroups - 1; + + /* + * cr_groups[0] holds egid. Returning the whole set + * here will cause a duplicate. Exclude cr_groups[0] + * to prevent that. + */ + + if ((ngrp = args->gidsetsize) == 0) { + td->td_retval[0] = bsd_gidsetsz; + return (0); + } + + if (ngrp < bsd_gidsetsz) + return (EINVAL); + + ngrp = 0; + linux_gidset = malloc(bsd_gidsetsz * sizeof(*linux_gidset), + M_TEMP, M_WAITOK); + while (ngrp < bsd_gidsetsz) { + linux_gidset[ngrp] = bsd_gidset[ngrp + 1]; + ngrp++; + } + + error = copyout(linux_gidset, args->grouplist, ngrp * sizeof(l_gid_t)); + free(linux_gidset, M_TEMP); + if (error) + return (error); + + td->td_retval[0] = ngrp; + return (0); +} + +int +linux_setrlimit(struct thread *td, struct linux_setrlimit_args *args) +{ + struct rlimit bsd_rlim; + struct l_rlimit rlim; + u_int which; + int error; + +#ifdef DEBUG + if (ldebug(setrlimit)) + printf(ARGS(setrlimit, "%d, %p"), + args->resource, (void *)args->rlim); +#endif + + if (args->resource >= LINUX_RLIM_NLIMITS) + return (EINVAL); + + which = linux_to_bsd_resource[args->resource]; + if (which == -1) + return (EINVAL); + + error = copyin(args->rlim, &rlim, sizeof(rlim)); + if (error) + return (error); + + bsd_rlim.rlim_cur = (rlim_t)rlim.rlim_cur; + bsd_rlim.rlim_max = (rlim_t)rlim.rlim_max; + return (kern_setrlimit(td, which, &bsd_rlim)); +} + +int +linux_old_getrlimit(struct thread *td, struct linux_old_getrlimit_args *args) +{ + struct l_rlimit rlim; + struct proc *p = td->td_proc; + struct rlimit bsd_rlim; + u_int which; + +#ifdef DEBUG + if (ldebug(old_getrlimit)) + printf(ARGS(old_getrlimit, "%d, %p"), + args->resource, (void *)args->rlim); +#endif + + if (args->resource >= LINUX_RLIM_NLIMITS) + return (EINVAL); + + which = linux_to_bsd_resource[args->resource]; + if (which == -1) + return (EINVAL); + + PROC_LOCK(p); + lim_rlimit(p, which, &bsd_rlim); + PROC_UNLOCK(p); + +#ifdef COMPAT_LINUX32 + rlim.rlim_cur = (unsigned int)bsd_rlim.rlim_cur; + if (rlim.rlim_cur == UINT_MAX) + rlim.rlim_cur = INT_MAX; + rlim.rlim_max = (unsigned int)bsd_rlim.rlim_max; + if (rlim.rlim_max == UINT_MAX) + rlim.rlim_max = INT_MAX; +#else + rlim.rlim_cur = (unsigned long)bsd_rlim.rlim_cur; + if (rlim.rlim_cur == ULONG_MAX) + rlim.rlim_cur = LONG_MAX; + rlim.rlim_max = (unsigned long)bsd_rlim.rlim_max; + if (rlim.rlim_max == ULONG_MAX) + rlim.rlim_max = LONG_MAX; +#endif + return (copyout(&rlim, args->rlim, sizeof(rlim))); +} + +int +linux_getrlimit(struct thread *td, struct linux_getrlimit_args *args) +{ + struct l_rlimit rlim; + struct proc *p = td->td_proc; + struct rlimit bsd_rlim; + u_int which; + +#ifdef DEBUG + if (ldebug(getrlimit)) + printf(ARGS(getrlimit, "%d, %p"), + args->resource, (void *)args->rlim); +#endif + + if (args->resource >= LINUX_RLIM_NLIMITS) + return (EINVAL); + + which = linux_to_bsd_resource[args->resource]; + if (which == -1) + return (EINVAL); + + PROC_LOCK(p); + lim_rlimit(p, which, &bsd_rlim); + PROC_UNLOCK(p); + + rlim.rlim_cur = (l_ulong)bsd_rlim.rlim_cur; + rlim.rlim_max = (l_ulong)bsd_rlim.rlim_max; + return (copyout(&rlim, args->rlim, sizeof(rlim))); +} + +int +linux_sched_setscheduler(struct thread *td, + struct linux_sched_setscheduler_args *args) +{ + struct sched_setscheduler_args bsd; + +#ifdef DEBUG + if (ldebug(sched_setscheduler)) + printf(ARGS(sched_setscheduler, "%d, %d, %p"), + args->pid, args->policy, (const void *)args->param); +#endif + + switch (args->policy) { + case LINUX_SCHED_OTHER: + bsd.policy = SCHED_OTHER; + break; + case LINUX_SCHED_FIFO: + bsd.policy = SCHED_FIFO; + break; + case LINUX_SCHED_RR: + bsd.policy = SCHED_RR; + break; + default: + return (EINVAL); + } + + bsd.pid = args->pid; + bsd.param = (struct sched_param *)args->param; + return (sched_setscheduler(td, &bsd)); +} + +int +linux_sched_getscheduler(struct thread *td, + struct linux_sched_getscheduler_args *args) +{ + struct sched_getscheduler_args bsd; + int error; + +#ifdef DEBUG + if (ldebug(sched_getscheduler)) + printf(ARGS(sched_getscheduler, "%d"), args->pid); +#endif + + bsd.pid = args->pid; + error = sched_getscheduler(td, &bsd); + + switch (td->td_retval[0]) { + case SCHED_OTHER: + td->td_retval[0] = LINUX_SCHED_OTHER; + break; + case SCHED_FIFO: + td->td_retval[0] = LINUX_SCHED_FIFO; + break; + case SCHED_RR: + td->td_retval[0] = LINUX_SCHED_RR; + break; + } + + return (error); +} + +int +linux_sched_get_priority_max(struct thread *td, + struct linux_sched_get_priority_max_args *args) +{ + struct sched_get_priority_max_args bsd; + +#ifdef DEBUG + if (ldebug(sched_get_priority_max)) + printf(ARGS(sched_get_priority_max, "%d"), args->policy); +#endif + + switch (args->policy) { + case LINUX_SCHED_OTHER: + bsd.policy = SCHED_OTHER; + break; + case LINUX_SCHED_FIFO: + bsd.policy = SCHED_FIFO; + break; + case LINUX_SCHED_RR: + bsd.policy = SCHED_RR; + break; + default: + return (EINVAL); + } + return (sched_get_priority_max(td, &bsd)); +} + +int +linux_sched_get_priority_min(struct thread *td, + struct linux_sched_get_priority_min_args *args) +{ + struct sched_get_priority_min_args bsd; + +#ifdef DEBUG + if (ldebug(sched_get_priority_min)) + printf(ARGS(sched_get_priority_min, "%d"), args->policy); +#endif + + switch (args->policy) { + case LINUX_SCHED_OTHER: + bsd.policy = SCHED_OTHER; + break; + case LINUX_SCHED_FIFO: + bsd.policy = SCHED_FIFO; + break; + case LINUX_SCHED_RR: + bsd.policy = SCHED_RR; + break; + default: + return (EINVAL); + } + return (sched_get_priority_min(td, &bsd)); +} + +#define REBOOT_CAD_ON 0x89abcdef +#define REBOOT_CAD_OFF 0 +#define REBOOT_HALT 0xcdef0123 +#define REBOOT_RESTART 0x01234567 +#define REBOOT_RESTART2 0xA1B2C3D4 +#define REBOOT_POWEROFF 0x4321FEDC +#define REBOOT_MAGIC1 0xfee1dead +#define REBOOT_MAGIC2 0x28121969 +#define REBOOT_MAGIC2A 0x05121996 +#define REBOOT_MAGIC2B 0x16041998 + +int +linux_reboot(struct thread *td, struct linux_reboot_args *args) +{ + struct reboot_args bsd_args; + +#ifdef DEBUG + if (ldebug(reboot)) + printf(ARGS(reboot, "0x%x"), args->cmd); +#endif + + if (args->magic1 != REBOOT_MAGIC1) + return (EINVAL); + + switch (args->magic2) { + case REBOOT_MAGIC2: + case REBOOT_MAGIC2A: + case REBOOT_MAGIC2B: + break; + default: + return (EINVAL); + } + + switch (args->cmd) { + case REBOOT_CAD_ON: + case REBOOT_CAD_OFF: + return (priv_check(td, PRIV_REBOOT)); + case REBOOT_HALT: + bsd_args.opt = RB_HALT; + break; + case REBOOT_RESTART: + case REBOOT_RESTART2: + bsd_args.opt = 0; + break; + case REBOOT_POWEROFF: + bsd_args.opt = RB_POWEROFF; + break; + default: + return (EINVAL); + } + return (reboot(td, &bsd_args)); +} + + +/* + * The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify + * td->td_retval[1] when COMPAT_43 is defined. This clobbers registers that + * are assumed to be preserved. The following lightweight syscalls fixes + * this. See also linux_getgid16() and linux_getuid16() in linux_uid16.c + * + * linux_getpid() - MP SAFE + * linux_getgid() - MP SAFE + * linux_getuid() - MP SAFE + */ + +int +linux_getpid(struct thread *td, struct linux_getpid_args *args) +{ + struct linux_emuldata *em; + +#ifdef DEBUG + if (ldebug(getpid)) + printf(ARGS(getpid, "")); +#endif + + if (linux_use26(td)) { + em = em_find(td->td_proc, EMUL_DONTLOCK); + KASSERT(em != NULL, ("getpid: emuldata not found.\n")); + td->td_retval[0] = em->shared->group_pid; + } else { + td->td_retval[0] = td->td_proc->p_pid; + } + + return (0); +} + +int +linux_gettid(struct thread *td, struct linux_gettid_args *args) +{ + +#ifdef DEBUG + if (ldebug(gettid)) + printf(ARGS(gettid, "")); +#endif + + td->td_retval[0] = td->td_proc->p_pid; + return (0); +} + + +int +linux_getppid(struct thread *td, struct linux_getppid_args *args) +{ + struct linux_emuldata *em; + struct proc *p, *pp; + +#ifdef DEBUG + if (ldebug(getppid)) + printf(ARGS(getppid, "")); +#endif + + if (!linux_use26(td)) { + PROC_LOCK(td->td_proc); + td->td_retval[0] = td->td_proc->p_pptr->p_pid; + PROC_UNLOCK(td->td_proc); + return (0); + } + + em = em_find(td->td_proc, EMUL_DONTLOCK); + + KASSERT(em != NULL, ("getppid: process emuldata not found.\n")); + + /* find the group leader */ + p = pfind(em->shared->group_pid); + + if (p == NULL) { +#ifdef DEBUG + printf(LMSG("parent process not found.\n")); +#endif + return (0); + } + + pp = p->p_pptr; /* switch to parent */ + PROC_LOCK(pp); + PROC_UNLOCK(p); + + /* if its also linux process */ + if (pp->p_sysent == &elf_linux_sysvec) { + em = em_find(pp, EMUL_DONTLOCK); + KASSERT(em != NULL, ("getppid: parent emuldata not found.\n")); + + td->td_retval[0] = em->shared->group_pid; + } else + td->td_retval[0] = pp->p_pid; + + PROC_UNLOCK(pp); + + return (0); +} + +int +linux_getgid(struct thread *td, struct linux_getgid_args *args) +{ + +#ifdef DEBUG + if (ldebug(getgid)) + printf(ARGS(getgid, "")); +#endif + + td->td_retval[0] = td->td_ucred->cr_rgid; + return (0); +} + +int +linux_getuid(struct thread *td, struct linux_getuid_args *args) +{ + +#ifdef DEBUG + if (ldebug(getuid)) + printf(ARGS(getuid, "")); +#endif + + td->td_retval[0] = td->td_ucred->cr_ruid; + return (0); +} + + +int +linux_getsid(struct thread *td, struct linux_getsid_args *args) +{ + struct getsid_args bsd; + +#ifdef DEBUG + if (ldebug(getsid)) + printf(ARGS(getsid, "%i"), args->pid); +#endif + + bsd.pid = args->pid; + return (getsid(td, &bsd)); +} + +int +linux_nosys(struct thread *td, struct nosys_args *ignore) +{ + + return (ENOSYS); +} + +int +linux_getpriority(struct thread *td, struct linux_getpriority_args *args) +{ + struct getpriority_args bsd_args; + int error; + +#ifdef DEBUG + if (ldebug(getpriority)) + printf(ARGS(getpriority, "%i, %i"), args->which, args->who); +#endif + + bsd_args.which = args->which; + bsd_args.who = args->who; + error = getpriority(td, &bsd_args); + td->td_retval[0] = 20 - td->td_retval[0]; + return (error); +} + +int +linux_sethostname(struct thread *td, struct linux_sethostname_args *args) +{ + int name[2]; + +#ifdef DEBUG + if (ldebug(sethostname)) + printf(ARGS(sethostname, "*, %i"), args->len); +#endif + + name[0] = CTL_KERN; + name[1] = KERN_HOSTNAME; + return (userland_sysctl(td, name, 2, 0, 0, 0, args->hostname, + args->len, 0, 0)); +} + +int +linux_setdomainname(struct thread *td, struct linux_setdomainname_args *args) +{ + int name[2]; + +#ifdef DEBUG + if (ldebug(setdomainname)) + printf(ARGS(setdomainname, "*, %i"), args->len); +#endif + + name[0] = CTL_KERN; + name[1] = KERN_NISDOMAINNAME; + return (userland_sysctl(td, name, 2, 0, 0, 0, args->name, + args->len, 0, 0)); +} + +int +linux_exit_group(struct thread *td, struct linux_exit_group_args *args) +{ + struct linux_emuldata *em; + +#ifdef DEBUG + if (ldebug(exit_group)) + printf(ARGS(exit_group, "%i"), args->error_code); +#endif + + em = em_find(td->td_proc, EMUL_DONTLOCK); + if (em->shared->refs > 1) { + EMUL_SHARED_WLOCK(&emul_shared_lock); + em->shared->flags |= EMUL_SHARED_HASXSTAT; + em->shared->xstat = W_EXITCODE(args->error_code, 0); + EMUL_SHARED_WUNLOCK(&emul_shared_lock); + if (linux_use26(td)) + linux_kill_threads(td, SIGKILL); + } + + /* + * XXX: we should send a signal to the parent if + * SIGNAL_EXIT_GROUP is set. We ignore that (temporarily?) + * as it doesnt occur often. + */ + exit1(td, W_EXITCODE(args->error_code, 0)); + + return (0); +} + +#define _LINUX_CAPABILITY_VERSION 0x19980330 + +struct l_user_cap_header { + l_int version; + l_int pid; +}; + +struct l_user_cap_data { + l_int effective; + l_int permitted; + l_int inheritable; +}; + +int +linux_capget(struct thread *td, struct linux_capget_args *args) +{ + struct l_user_cap_header luch; + struct l_user_cap_data lucd; + int error; + + if (args->hdrp == NULL) + return (EFAULT); + + error = copyin(args->hdrp, &luch, sizeof(luch)); + if (error != 0) + return (error); + + if (luch.version != _LINUX_CAPABILITY_VERSION) { + luch.version = _LINUX_CAPABILITY_VERSION; + error = copyout(&luch, args->hdrp, sizeof(luch)); + if (error) + return (error); + return (EINVAL); + } + + if (luch.pid) + return (EPERM); + + if (args->datap) { + /* + * The current implementation doesn't support setting + * a capability (it's essentially a stub) so indicate + * that no capabilities are currently set or available + * to request. + */ + bzero (&lucd, sizeof(lucd)); + error = copyout(&lucd, args->datap, sizeof(lucd)); + } + + return (error); +} + +int +linux_capset(struct thread *td, struct linux_capset_args *args) +{ + struct l_user_cap_header luch; + struct l_user_cap_data lucd; + int error; + + if (args->hdrp == NULL || args->datap == NULL) + return (EFAULT); + + error = copyin(args->hdrp, &luch, sizeof(luch)); + if (error != 0) + return (error); + + if (luch.version != _LINUX_CAPABILITY_VERSION) { + luch.version = _LINUX_CAPABILITY_VERSION; + error = copyout(&luch, args->hdrp, sizeof(luch)); + if (error) + return (error); + return (EINVAL); + } + + if (luch.pid) + return (EPERM); + + error = copyin(args->datap, &lucd, sizeof(lucd)); + if (error != 0) + return (error); + + /* We currently don't support setting any capabilities. */ + if (lucd.effective || lucd.permitted || lucd.inheritable) { + linux_msg(td, + "capset effective=0x%x, permitted=0x%x, " + "inheritable=0x%x is not implemented", + (int)lucd.effective, (int)lucd.permitted, + (int)lucd.inheritable); + return (EPERM); + } + + return (0); +} + +int +linux_prctl(struct thread *td, struct linux_prctl_args *args) +{ + int error = 0, max_size; + struct proc *p = td->td_proc; + char comm[LINUX_MAX_COMM_LEN]; + struct linux_emuldata *em; + int pdeath_signal; + +#ifdef DEBUG + if (ldebug(prctl)) + printf(ARGS(prctl, "%d, %d, %d, %d, %d"), args->option, + args->arg2, args->arg3, args->arg4, args->arg5); +#endif + + switch (args->option) { + case LINUX_PR_SET_PDEATHSIG: + if (!LINUX_SIG_VALID(args->arg2)) + return (EINVAL); + em = em_find(p, EMUL_DOLOCK); + KASSERT(em != NULL, ("prctl: emuldata not found.\n")); + em->pdeath_signal = args->arg2; + EMUL_UNLOCK(&emul_lock); + break; + case LINUX_PR_GET_PDEATHSIG: + em = em_find(p, EMUL_DOLOCK); + KASSERT(em != NULL, ("prctl: emuldata not found.\n")); + pdeath_signal = em->pdeath_signal; + EMUL_UNLOCK(&emul_lock); + error = copyout(&pdeath_signal, + (void *)(register_t)args->arg2, + sizeof(pdeath_signal)); + break; + case LINUX_PR_GET_KEEPCAPS: + /* + * Indicate that we always clear the effective and + * permitted capability sets when the user id becomes + * non-zero (actually the capability sets are simply + * always zero in the current implementation). + */ + td->td_retval[0] = 0; + break; + case LINUX_PR_SET_KEEPCAPS: + /* + * Ignore requests to keep the effective and permitted + * capability sets when the user id becomes non-zero. + */ + break; + case LINUX_PR_SET_NAME: + /* + * To be on the safe side we need to make sure to not + * overflow the size a linux program expects. We already + * do this here in the copyin, so that we don't need to + * check on copyout. + */ + max_size = MIN(sizeof(comm), sizeof(p->p_comm)); + error = copyinstr((void *)(register_t)args->arg2, comm, + max_size, NULL); + + /* Linux silently truncates the name if it is too long. */ + if (error == ENAMETOOLONG) { + /* + * XXX: copyinstr() isn't documented to populate the + * array completely, so do a copyin() to be on the + * safe side. This should be changed in case + * copyinstr() is changed to guarantee this. + */ + error = copyin((void *)(register_t)args->arg2, comm, + max_size - 1); + comm[max_size - 1] = '\0'; + } + if (error) + return (error); + + PROC_LOCK(p); + strlcpy(p->p_comm, comm, sizeof(p->p_comm)); + PROC_UNLOCK(p); + break; + case LINUX_PR_GET_NAME: + PROC_LOCK(p); + strlcpy(comm, p->p_comm, sizeof(comm)); + PROC_UNLOCK(p); + error = copyout(comm, (void *)(register_t)args->arg2, + strlen(comm) + 1); + break; + default: + error = EINVAL; + break; + } + + return (error); +} + +/* + * Get affinity of a process. + */ +int +linux_sched_getaffinity(struct thread *td, + struct linux_sched_getaffinity_args *args) +{ + int error; + struct cpuset_getaffinity_args cga; + +#ifdef DEBUG + if (ldebug(sched_getaffinity)) + printf(ARGS(sched_getaffinity, "%d, %d, *"), args->pid, + args->len); +#endif + if (args->len < sizeof(cpuset_t)) + return (EINVAL); + + cga.level = CPU_LEVEL_WHICH; + cga.which = CPU_WHICH_PID; + cga.id = args->pid; + cga.cpusetsize = sizeof(cpuset_t); + cga.mask = (cpuset_t *) args->user_mask_ptr; + + if ((error = cpuset_getaffinity(td, &cga)) == 0) + td->td_retval[0] = sizeof(cpuset_t); + + return (error); +} + +/* + * Set affinity of a process. + */ +int +linux_sched_setaffinity(struct thread *td, + struct linux_sched_setaffinity_args *args) +{ + struct cpuset_setaffinity_args csa; + +#ifdef DEBUG + if (ldebug(sched_setaffinity)) + printf(ARGS(sched_setaffinity, "%d, %d, *"), args->pid, + args->len); +#endif + if (args->len < sizeof(cpuset_t)) + return (EINVAL); + + csa.level = CPU_LEVEL_WHICH; + csa.which = CPU_WHICH_PID; + csa.id = args->pid; + csa.cpusetsize = sizeof(cpuset_t); + csa.mask = (cpuset_t *) args->user_mask_ptr; + + return (cpuset_setaffinity(td, &csa)); +} |
