From 8daa83a594a2e98f39d764422bfbdbc62c9efd44 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 19:20:00 +0200 Subject: Adding upstream version 2:4.20.0+dfsg. Signed-off-by: Daniel Baumann --- third_party/heimdal/lib/kafs/afssys.c | 630 ++++++++++++++++++++++++++++++++++ 1 file changed, 630 insertions(+) create mode 100644 third_party/heimdal/lib/kafs/afssys.c (limited to 'third_party/heimdal/lib/kafs/afssys.c') diff --git a/third_party/heimdal/lib/kafs/afssys.c b/third_party/heimdal/lib/kafs/afssys.c new file mode 100644 index 0000000..b400626 --- /dev/null +++ b/third_party/heimdal/lib/kafs/afssys.c @@ -0,0 +1,630 @@ +/* + * Copyright (c) 1995 - 2000, 2002, 2004, 2005 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * 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. + * + * 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. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE OR CONTRIBUTORS 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 "kafs_locl.h" + +struct procdata { + unsigned long param4; + unsigned long param3; + unsigned long param2; + unsigned long param1; + unsigned long syscall; +}; +#ifdef __GNU__ +#define _IOT_procdata _IOT(_IOTS(long), 5, 0, 0, 0, 0) +#define VIOC_SYSCALL_PROC _IOW('C', 1, struct procdata) +#else +#define VIOC_SYSCALL_PROC _IOW('C', 1, void *) +#endif + +struct devdata { + unsigned long syscall; + unsigned long param1; + unsigned long param2; + unsigned long param3; + unsigned long param4; + unsigned long param5; + unsigned long param6; + unsigned long retval; +}; +#ifdef __GNU__ +#define _IOT_devdata _IOT(_IOTS(long), 8, 0, 0, 0, 0) +#endif +#ifdef _IOWR +#define VIOC_SYSCALL_DEV _IOWR('C', 2, struct devdata) +#define VIOC_SYSCALL_DEV_OPENAFS _IOWR('C', 1, struct devdata) +#endif + +#ifdef _IOW +#ifdef _ILP32 +struct sundevdata { + uint32_t param6; + uint32_t param5; + uint32_t param4; + uint32_t param3; + uint32_t param2; + uint32_t param1; + uint32_t syscall; +}; +#define VIOC_SUN_SYSCALL_DEV _IOW('C', 2, struct sundevdata) +#else +struct sundevdata { + uint64_t param6; + uint64_t param5; + uint64_t param4; + uint64_t param3; + uint64_t param2; + uint64_t param1; + uint64_t syscall; +}; +#define VIOC_SUN_SYSCALL_DEV _IOW('C', 1, struct sundevdata) +#endif +#endif /* _IOW */ + + +int _kafs_debug; /* this should be done in a better way */ + +#define UNKNOWN_ENTRY_POINT (-1) +#define NO_ENTRY_POINT 0 +#define SINGLE_ENTRY_POINT 1 +#define MULTIPLE_ENTRY_POINT 2 +#define SINGLE_ENTRY_POINT2 3 +#define SINGLE_ENTRY_POINT3 4 +#define LINUX_PROC_POINT 5 +#define AIX_ENTRY_POINTS 6 +#define MACOS_DEV_POINT 7 +#define SUN_PROC_POINT 8 + +static int afs_entry_point = UNKNOWN_ENTRY_POINT; +#if defined(AFS_SYSCALL) || defined(AFS_SYSCALL2) || defined(AFS_SYSCALL3) || defined(AFS_PIOCTL) +static int afs_syscalls[2]; +#endif +static char *afs_ioctlpath; +static unsigned long afs_ioctlnum; + +/* Magic to get AIX syscalls to work */ +#ifdef _AIX + +static int (*Pioctl)(char*, int, struct ViceIoctl*, int); +static int (*Setpag)(void); + +#include "dlfcn.h" + +/* + * + */ + +static int +try_aix(void) +{ +#ifdef STATIC_AFS_SYSCALLS + Pioctl = aix_pioctl; + Setpag = aix_setpag; +#else + void *ptr; + char path[MaxPathLen], *p; + /* + * If we are root or running setuid don't trust AFSLIBPATH! + */ + if (getuid() != 0 && (p = secure_getenv("AFSLIBPATH")) != NULL) + strlcpy(path, p, sizeof(path)); + else + snprintf(path, sizeof(path), "%s/afslib.so", LIBDIR); + + ptr = dlopen(path, RTLD_NOW); + if(ptr == NULL) { + if(_kafs_debug) { + if(errno == ENOEXEC && (p = dlerror()) != NULL) + fprintf(stderr, "dlopen(%s): %s\n", path, p); + else if (errno != ENOENT) + fprintf(stderr, "dlopen(%s): %s\n", path, strerror(errno)); + } + return 1; + } + Setpag = (int (*)(void))dlsym(ptr, "aix_setpag"); + Pioctl = (int (*)(char*, int, + struct ViceIoctl*, int))dlsym(ptr, "aix_pioctl"); +#endif + afs_entry_point = AIX_ENTRY_POINTS; + return 0; +} +#endif /* _AIX */ + +/* + * This probably only works under Solaris and could get confused if + * there's a /etc/name_to_sysnum file. + */ + +#if defined(AFS_SYSCALL) || defined(AFS_SYSCALL2) || defined(AFS_SYSCALL3) + +#define _PATH_ETC_NAME_TO_SYSNUM "/etc/name_to_sysnum" + +static int +map_syscall_name_to_number (const char *str, int *res) +{ + FILE *f; + char buf[256]; + size_t str_len = strlen (str); + + f = fopen (_PATH_ETC_NAME_TO_SYSNUM, "r"); + if (f == NULL) + return -1; + while (fgets (buf, sizeof(buf), f) != NULL) { + if (buf[0] == '#') + continue; + + if (strncmp (str, buf, str_len) == 0) { + char *begptr = buf + str_len; + char *endptr; + long val = strtol (begptr, &endptr, 0); + + if (val != 0 && endptr != begptr) { + fclose (f); + *res = val; + return 0; + } + } + } + fclose (f); + return -1; +} +#endif + +static int +try_ioctlpath(const char *path, unsigned long ioctlnum, int entrypoint) +{ + int fd, ret, saved_errno; + + fd = open(path, O_RDWR); + if (fd < 0) + return 1; + switch (entrypoint) { + case LINUX_PROC_POINT: { + struct procdata data = { 0, 0, 0, 0, AFSCALL_PIOCTL }; + data.param2 = (unsigned long)VIOCGETTOK; + ret = ioctl(fd, ioctlnum, &data); + break; + } + case MACOS_DEV_POINT: { + struct devdata data = { AFSCALL_PIOCTL, 0, 0, 0, 0, 0, 0, 0 }; + data.param2 = (unsigned long)VIOCGETTOK; + ret = ioctl(fd, ioctlnum, &data); + break; + } + case SUN_PROC_POINT: { + struct sundevdata data = { 0, 0, 0, 0, 0, 0, AFSCALL_PIOCTL }; + data.param2 = (unsigned long)VIOCGETTOK; + ret = ioctl(fd, ioctlnum, &data); + break; + } + default: + abort(); + } + saved_errno = errno; + close(fd); + /* + * Be quite liberal in what error are ok, the first is the one + * that should trigger given that params is NULL. + */ + if (ret && + (saved_errno != EFAULT && + saved_errno != EDOM && + saved_errno != ENOTCONN)) + return 1; + afs_ioctlnum = ioctlnum; + afs_ioctlpath = strdup(path); + if (afs_ioctlpath == NULL) + return 1; + afs_entry_point = entrypoint; + return 0; +} + +static int +do_ioctl(void *data) +{ + int fd, ret, saved_errno; + fd = open(afs_ioctlpath, O_RDWR); + if (fd < 0) { + errno = EINVAL; + return -1; + } + ret = ioctl(fd, afs_ioctlnum, data); + saved_errno = errno; + close(fd); + errno = saved_errno; + return ret; +} + +int +k_pioctl(char *a_path, + int o_opcode, + struct ViceIoctl *a_paramsP, + int a_followSymlinks) +{ +#ifndef NO_AFS + switch(afs_entry_point){ +#if defined(AFS_SYSCALL) || defined(AFS_SYSCALL2) || defined(AFS_SYSCALL3) + case SINGLE_ENTRY_POINT: + case SINGLE_ENTRY_POINT2: + case SINGLE_ENTRY_POINT3: + return syscall(afs_syscalls[0], AFSCALL_PIOCTL, + a_path, o_opcode, a_paramsP, a_followSymlinks); +#endif +#if defined(AFS_PIOCTL) + case MULTIPLE_ENTRY_POINT: + return syscall(afs_syscalls[0], + a_path, o_opcode, a_paramsP, a_followSymlinks); +#endif + case LINUX_PROC_POINT: { + struct procdata data = { 0, 0, 0, 0, AFSCALL_PIOCTL }; + data.param1 = (unsigned long)a_path; + data.param2 = (unsigned long)o_opcode; + data.param3 = (unsigned long)a_paramsP; + data.param4 = (unsigned long)a_followSymlinks; + return do_ioctl(&data); + } + case MACOS_DEV_POINT: { + struct devdata data = { AFSCALL_PIOCTL, 0, 0, 0, 0, 0, 0, 0 }; + int ret; + + data.param1 = (unsigned long)a_path; + data.param2 = (unsigned long)o_opcode; + data.param3 = (unsigned long)a_paramsP; + data.param4 = (unsigned long)a_followSymlinks; + + ret = do_ioctl(&data); + if (ret) + return ret; + + return data.retval; + } + case SUN_PROC_POINT: { + struct sundevdata data = { 0, 0, 0, 0, 0, 0, AFSCALL_PIOCTL }; + data.param1 = (unsigned long)a_path; + data.param2 = (unsigned long)o_opcode; + data.param3 = (unsigned long)a_paramsP; + data.param4 = (unsigned long)a_followSymlinks; + return do_ioctl(&data); + } +#ifdef _AIX + case AIX_ENTRY_POINTS: + return Pioctl(a_path, o_opcode, a_paramsP, a_followSymlinks); +#endif + } + errno = ENOSYS; +#ifdef SIGSYS + kill(getpid(), SIGSYS); /* You lose! */ +#endif +#endif /* NO_AFS */ + return -1; +} + +int +k_afs_cell_of_file(const char *path, char *cell, int len) +{ + struct ViceIoctl parms; + parms.in = NULL; + parms.in_size = 0; + parms.out = cell; + parms.out_size = len; + return k_pioctl(rk_UNCONST(path), VIOC_FILE_CELL_NAME, &parms, 1); +} + +int +k_unlog(void) +{ + struct ViceIoctl parms; + memset(&parms, 0, sizeof(parms)); + return k_pioctl(0, VIOCUNLOG, &parms, 0); +} + +int +k_setpag(void) +{ +#ifndef NO_AFS + switch(afs_entry_point){ +#if defined(AFS_SYSCALL) || defined(AFS_SYSCALL2) || defined(AFS_SYSCALL3) + case SINGLE_ENTRY_POINT: + case SINGLE_ENTRY_POINT2: + case SINGLE_ENTRY_POINT3: + return syscall(afs_syscalls[0], AFSCALL_SETPAG); +#endif +#if defined(AFS_PIOCTL) + case MULTIPLE_ENTRY_POINT: + return syscall(afs_syscalls[1]); +#endif + case LINUX_PROC_POINT: { + struct procdata data = { 0, 0, 0, 0, AFSCALL_SETPAG }; + return do_ioctl(&data); + } + case MACOS_DEV_POINT: { + struct devdata data = { AFSCALL_SETPAG, 0, 0, 0, 0, 0, 0, 0 }; + int ret = do_ioctl(&data); + if (ret) + return ret; + return data.retval; + } + case SUN_PROC_POINT: { + struct sundevdata data = { 0, 0, 0, 0, 0, 0, AFSCALL_SETPAG }; + return do_ioctl(&data); + } +#ifdef _AIX + case AIX_ENTRY_POINTS: + return Setpag(); +#endif + } + + errno = ENOSYS; +#ifdef SIGSYS + kill(getpid(), SIGSYS); /* You lose! */ +#endif +#endif /* NO_AFS */ + return -1; +} + +static jmp_buf catch_SIGSYS; + +#ifdef SIGSYS + +static RETSIGTYPE +SIGSYS_handler(int sig) +{ + errno = 0; + signal(SIGSYS, SIGSYS_handler); /* Need to reinstall handler on SYSV */ + longjmp(catch_SIGSYS, 1); +} + +#endif + +/* + * Try to see if `syscall' is a pioctl. Return 0 iff succesful. + */ + +#if defined(AFS_SYSCALL) || defined(AFS_SYSCALL2) || defined(AFS_SYSCALL3) +static int +try_one (int syscall_num) +{ + struct ViceIoctl parms; + memset(&parms, 0, sizeof(parms)); + + if (setjmp(catch_SIGSYS) == 0) { + syscall(syscall_num, AFSCALL_PIOCTL, + 0, VIOCSETTOK, &parms, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0); + if (errno == EINVAL) { + afs_entry_point = SINGLE_ENTRY_POINT; + afs_syscalls[0] = syscall_num; + return 0; + } + } + return 1; +} +#endif + +/* + * Try to see if `syscall_pioctl' is a pioctl syscall. Return 0 iff + * succesful. + * + */ + +#ifdef AFS_PIOCTL +static int +try_two (int syscall_pioctl, int syscall_setpag) +{ + struct ViceIoctl parms; + memset(&parms, 0, sizeof(parms)); + + if (setjmp(catch_SIGSYS) == 0) { + syscall(syscall_pioctl, + 0, VIOCSETTOK, &parms, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0); + if (errno == EINVAL) { + afs_entry_point = MULTIPLE_ENTRY_POINT; + afs_syscalls[0] = syscall_pioctl; + afs_syscalls[1] = syscall_setpag; + return 0; + } + } + return 1; +} +#endif + +int +k_hasafs(void) +{ +#if !defined(NO_AFS) && defined(SIGSYS) + RETSIGTYPE (*saved_func)(int); +#endif + int saved_errno, ret; + char *env = NULL; + + env = secure_getenv("AFS_SYSCALL"); + + /* + * Already checked presence of AFS syscalls? + */ + if (afs_entry_point != UNKNOWN_ENTRY_POINT) + return afs_entry_point != NO_ENTRY_POINT; + + /* + * Probe kernel for AFS specific syscalls, + * they (currently) come in two flavors. + * If the syscall is absent we recive a SIGSYS. + */ + afs_entry_point = NO_ENTRY_POINT; + + saved_errno = errno; +#ifndef NO_AFS +#ifdef SIGSYS + saved_func = signal(SIGSYS, SIGSYS_handler); +#endif + if (env && strstr(env, "..") == NULL) { + + if (strncmp("/proc/", env, 6) == 0) { + if (try_ioctlpath(env, VIOC_SYSCALL_PROC, LINUX_PROC_POINT) == 0) + goto done; + } + if (strncmp("/dev/", env, 5) == 0) { +#ifdef VIOC_SYSCALL_DEV + if (try_ioctlpath(env, VIOC_SYSCALL_DEV, MACOS_DEV_POINT) == 0) + goto done; +#endif +#ifdef VIOC_SYSCALL_DEV_OPENAFS + if (try_ioctlpath(env,VIOC_SYSCALL_DEV_OPENAFS,MACOS_DEV_POINT) ==0) + goto done; +#endif + } + } + + ret = try_ioctlpath("/proc/fs/openafs/afs_ioctl", + VIOC_SYSCALL_PROC, LINUX_PROC_POINT); + if (ret == 0) + goto done; + ret = try_ioctlpath("/proc/fs/nnpfs/afs_ioctl", + VIOC_SYSCALL_PROC, LINUX_PROC_POINT); + if (ret == 0) + goto done; + +#ifdef VIOC_SYSCALL_DEV_OPENAFS + ret = try_ioctlpath("/dev/openafs_ioctl", + VIOC_SYSCALL_DEV_OPENAFS, MACOS_DEV_POINT); + if (ret == 0) + goto done; +#endif +#ifdef VIOC_SYSCALL_DEV + ret = try_ioctlpath("/dev/nnpfs_ioctl", VIOC_SYSCALL_DEV, MACOS_DEV_POINT); + if (ret == 0) + goto done; +#endif +#ifdef VIOC_SUN_SYSCALL_DEV + ret = try_ioctlpath("/dev/afs", VIOC_SUN_SYSCALL_DEV, SUN_PROC_POINT); + if (ret == 0) + goto done; +#endif + + +#if defined(AFS_SYSCALL) || defined(AFS_SYSCALL2) || defined(AFS_SYSCALL3) + { + int tmp; + + if (env != NULL) { + if (sscanf (env, "%d", &tmp) == 1) { + if (try_one (tmp) == 0) + goto done; + } else { + char *end = NULL; + char *p; + char *s = strdup (env); + + if (s != NULL) { + for (p = strtok_r (s, ",", &end); + p != NULL; + p = strtok_r (NULL, ",", &end)) { + if (map_syscall_name_to_number (p, &tmp) == 0) + if (try_one (tmp) == 0) { + free (s); + goto done; + } + } + free (s); + } + } + } + } +#endif /* AFS_SYSCALL || AFS_SYSCALL2 || AFS_SYSCALL3 */ + +#ifdef AFS_SYSCALL + if (try_one (AFS_SYSCALL) == 0) + goto done; +#endif /* AFS_SYSCALL */ + +#ifdef AFS_PIOCTL + { + int tmp[2]; + + if (env != NULL && sscanf (env, "%d%d", &tmp[0], &tmp[1]) == 2) + if (try_two (tmp[0], tmp[1]) == 2) + goto done; + } +#endif /* AFS_PIOCTL */ + +#ifdef AFS_PIOCTL + if (try_two (AFS_PIOCTL, AFS_SETPAG) == 0) + goto done; +#endif /* AFS_PIOCTL */ + +#ifdef AFS_SYSCALL2 + if (try_one (AFS_SYSCALL2) == 0) + goto done; +#endif /* AFS_SYSCALL2 */ + +#ifdef AFS_SYSCALL3 + if (try_one (AFS_SYSCALL3) == 0) + goto done; +#endif /* AFS_SYSCALL3 */ + +#ifdef _AIX +#if 0 + if (env != NULL) { + char *pos = NULL; + char *pioctl_name; + char *setpag_name; + + pioctl_name = strtok_r (env, ", \t", &pos); + if (pioctl_name != NULL) { + setpag_name = strtok_r (NULL, ", \t", &pos); + if (setpag_name != NULL) + if (try_aix (pioctl_name, setpag_name) == 0) + goto done; + } + } +#endif + + if(try_aix() == 0) + goto done; +#endif + + +done: +#ifdef SIGSYS + signal(SIGSYS, saved_func); +#endif +#endif /* NO_AFS */ + errno = saved_errno; + return afs_entry_point != NO_ENTRY_POINT; +} + +int +k_hasafs_recheck(void) +{ + afs_entry_point = UNKNOWN_ENTRY_POINT; + return k_hasafs(); +} -- cgit v1.2.3