2 * Copyright 2000, International Business Machines Corporation and others.
5 * This software has been released under the terms of the IBM Public
6 * License. For details, see the LICENSE file in the top-level source
7 * directory or online at http://www.openafs.org/dl/license10.html
11 * Linux implementation.
15 #ifndef OSI_MACHDEP_H_
16 #define OSI_MACHDEP_H_
18 /* Only needed for xdr.h in glibc 2.1.x */
20 # define quad_t __quad_t
21 # define u_quad_t __u_quad_t
26 #ifdef STRUCT_TASK_STRUCT_HAS_TGID
27 # define getpid() current->tgid
28 # ifdef STRUCT_TASK_STRUCT_HAS_REAL_PARENT
29 # define getppid() current->real_parent->tgid
30 # elif defined(STRUCT_TASK_STRUCT_HAS_PARENT)
31 # define getppid() current->parent->tgid
33 # define getppid() current->p_opptr->tgid
35 #else /* !STRUCT_TASK_STRUCT_HAS_TGID */
36 # define getpid() current->pid
37 # ifdef STRUCT_TASK_STRUCT_HAS_REAL_PARENT
38 # define getppid() current->real_parent->pid
39 # elif defined(STRUCT_TASK_STRUCT_HAS_PARENT)
40 # define getppid() current->parent->pid
42 # define getppid() current->p_opptr->pid
44 #endif /* STRUCT_TASK_STRUCT_HAS_TGID */
46 #ifdef RECALC_SIGPENDING_TAKES_VOID
47 # define RECALC_SIGPENDING(X) recalc_sigpending()
49 # define RECALC_SIGPENDING(X) recalc_sigpending(X)
52 #if defined (STRUCT_TASK_STRUCT_HAS_SIGMASK_LOCK)
53 # define SIG_LOCK(X) spin_lock_irq(&X->sigmask_lock)
54 # define SIG_UNLOCK(X) spin_unlock_irq(&X->sigmask_lock)
55 #elif defined (STRUCT_TASK_STRUCT_HAS_SIGHAND)
56 # define SIG_LOCK(X) spin_lock_irq(&X->sighand->siglock)
57 # define SIG_UNLOCK(X) spin_unlock_irq(&X->sighand->siglock)
59 # define SIG_LOCK(X) spin_lock_irq(&X->sig->siglock)
60 # define SIG_UNLOCK(X) spin_unlock_irq(&X->sig->siglock)
63 #if defined (STRUCT_TASK_STRUCT_HAS_RLIM)
64 # define TASK_STRUCT_RLIM rlim
65 #elif defined (STRUCT_TASK_STRUCT_HAS_SIGNAL_RLIM)
66 # define TASK_STRUCT_RLIM signal->rlim
68 # error Not sure what to do about rlim (should be in the Linux task struct somewhere....)
74 /* in case cred.h is present but not included in sched.h */
75 #if defined(HAVE_LINUX_CRED_H)
79 #include "afs/sysincludes.h"
81 #if !defined(HAVE_LINUX_TIME_T)
82 typedef time64_t time_t;
85 #if defined(HAVE_LINUX_KTIME_GET_COARSE_REAL_TS64)
86 static inline time_t osi_Time(void) {
87 struct timespec64 xtime;
88 ktime_get_coarse_real_ts64(&xtime);
91 #elif defined(HAVE_LINUX_CURRENT_KERNEL_TIME)
92 static inline time_t osi_Time(void) {
93 struct timespec xtime;
94 xtime = current_kernel_time();
98 # define osi_Time() (xtime.tv_sec)
101 #if defined(HAVE_LINUX_KTIME_GET_REAL_TS64)
103 osi_GetTime(osi_timeval32_t *atv)
105 struct timespec64 now;
106 ktime_get_real_ts64(&now);
107 atv->tv_sec = now.tv_sec;
108 atv->tv_usec = now.tv_nsec / 1000;
112 osi_GetTime(osi_timeval32_t *atv)
115 do_gettimeofday(&now);
116 atv->tv_sec = now.tv_sec;
117 atv->tv_usec = now.tv_usec;
121 #undef gop_lookupname
122 #define gop_lookupname osi_lookupname
124 #undef gop_lookupname_user
125 #define gop_lookupname_user osi_lookupname
127 #define VN_HOLD(V) osi_Assert(igrab((V)) == (V))
128 #define VN_RELE(V) iput((V))
130 #define afs_suser(x) capable(CAP_SYS_ADMIN)
131 extern int afs_osi_Wakeup(void *event);
135 afs_osi_Wakeup(event);
138 #define vType(V) ((AFSTOV((V)))->i_mode & S_IFMT)
139 #define vSetType(V, type) AFSTOV((V))->i_mode = ((type) | (AFSTOV((V))->i_mode & ~S_IFMT)) /* preserve mode */
140 #define vSetVfsp(V, vfsp) /* unused */
141 #define IsAfsVnode(V) ((V)->i_sb == afs_globalVFS) /* test superblock instead */
142 #define SetAfsVnode(V) /* unnecessary */
144 #if defined(HAVE_LINUX_UACCESS_H)
145 #include <linux/uaccess.h>
147 #include <asm/uaccess.h>
150 #define copyin(F, T, C) (copy_from_user ((char*)(T), (char*)(F), (C)) > 0 ? EFAULT : 0)
151 static inline long copyinstr(char *from, char *to, int count, int *length) {
153 tmp = strncpy_from_user(to, from, count);
159 #define copyout(F, T, C) (copy_to_user ((char*)(T), (char*)(F), (C)) > 0 ? EFAULT : 0)
162 * Test to see for 64/32bit compatibility mode
163 * Return non-zero if in a 64bit kernel and handing a 32bit syscall
165 #if defined(AFS_LINUX_64BIT_KERNEL) && !defined(AFS_ALPHA_LINUX_ENV) && !defined(AFS_IA64_LINUX_ENV)
167 afs_in_compat_syscall(void)
169 # if defined(HAVE_LINUX_IN_COMPAT_SYSCALL)
170 return in_compat_syscall();
171 # elif defined(AFS_SPARC64_LINUX_ENV)
172 return test_thread_flag(TIF_32BIT);
173 # elif defined(AFS_AMD64_LINUX_ENV)
174 return test_thread_flag(TIF_IA32);
175 # elif defined(AFS_PPC64_LINUX_ENV)
176 # if defined(STRUCT_TASK_STRUCT_HAS_THREAD_INFO)
177 return (current->thread_info->flags & _TIF_32BIT) != 0;
179 return (task_thread_info(current)->flags & _TIF_32BIT) != 0;
181 # elif defined(AFS_S390X_LINUX_ENV)
182 return test_thread_flag(TIF_31BIT);
183 # elif defined(AFS_ARM64_LINUX_ENV)
184 return is_compat_task();
186 # error afs_in_compat_syscall not done for this linux
189 #endif /* AFS_LINUX_64BIT_KERNEL */
191 /* kernel print statements */
192 #define printf(args...) printk(args)
193 #define uprintf(args...) printk(args)
197 #define NGROUPS NGROUPS_SMALL
200 #ifdef STRUCT_GROUP_INFO_HAS_GID
201 /* compat macro for Linux 4.9 */
202 #define GROUP_AT(gi,x) ((gi)->gid[x])
205 typedef struct task_struct afs_proc_t;
207 #ifdef HAVE_LINUX_KUID_T
209 #include <linux/uidgid.h>
210 typedef kuid_t afs_kuid_t;
211 typedef kgid_t afs_kgid_t;
212 extern struct user_namespace *afs_ns;
213 # ifdef CONFIG_USER_NS
214 # define afs_current_user_ns() current_user_ns()
216 /* Here current_user_ns() expands to GPL-only init_user_ns symbol! */
217 # define afs_current_user_ns() ((struct user_namespace *)NULL)
220 static inline kuid_t afs_make_kuid(uid_t uid) {
221 return make_kuid(afs_ns, uid);
223 static inline kgid_t afs_make_kgid(gid_t gid) {
224 return make_kgid(afs_ns, gid);
226 static inline uid_t afs_from_kuid(kuid_t kuid) {
227 return from_kuid(afs_ns, kuid);
229 static inline uid_t afs_from_kgid(kgid_t kgid) {
230 return from_kgid(afs_ns, kgid);
235 typedef uid_t afs_kuid_t;
236 typedef gid_t afs_kgid_t;
238 static inline afs_kuid_t afs_make_kuid(uid_t uid) {return uid;}
239 static inline afs_kgid_t afs_make_kgid(gid_t gid) {return gid;}
240 static inline uid_t afs_from_kuid(afs_kuid_t kuid) {return kuid;}
241 static inline gid_t afs_from_kgid(afs_kgid_t kgid) {return kgid;}
242 static inline unsigned char uid_eq(uid_t a, uid_t b) {return a == b;}
243 static inline unsigned char gid_eq(gid_t a, gid_t b) {return a == b;}
244 static inline unsigned char uid_lt(uid_t a, uid_t b) {return a < b;}
245 static inline unsigned char gid_lt(gid_t a, gid_t b) {return a < b;}
246 #define GLOBAL_ROOT_UID ((afs_kuid_t) 0)
247 #define GLOBAL_ROOT_GID ((afs_kgid_t) 0)
251 /* Credentials. For newer kernels we use the kernel structure directly. */
252 #if defined(STRUCT_TASK_STRUCT_HAS_CRED)
254 typedef struct cred afs_ucred_t;
255 typedef struct cred cred_t;
257 # define afs_cr_uid(cred) (afs_from_kuid((cred)->fsuid))
258 # define afs_cr_gid(cred) (afs_from_kgid((cred)->fsgid))
259 # define afs_cr_ruid(cred) (afs_from_kuid((cred)->uid))
260 # define afs_cr_rgid(cred) (afs_from_kgid((cred)->gid))
261 # define afs_cr_group_info(cred) ((cred)->group_info)
262 # define crhold(c) (get_cred(c))
264 afs_set_cr_uid(cred_t *cred, uid_t uid) {
265 cred->fsuid = afs_make_kuid(uid);
268 afs_set_cr_gid(cred_t *cred, gid_t gid) {
269 cred->fsgid = afs_make_kgid(gid);
272 afs_set_cr_ruid(cred_t *cred, uid_t uid) {
273 cred->uid = afs_make_kuid(uid);
276 afs_set_cr_rgid(cred_t *cred, gid_t gid) {
277 cred->gid = afs_make_kgid(gid);
280 afs_set_cr_group_info(cred_t *cred, struct group_info *group_info) {
281 cred->group_info = group_info;
284 # define current_group_info() (current->cred->group_info)
285 # define task_gid(task) (task->cred->gid)
286 # define task_user(task) (task->cred->user)
287 # if defined(STRUCT_CRED_HAS_SESSION_KEYRING)
288 # define task_session_keyring(task) (task->cred->session_keyring)
289 # define current_session_keyring() (current->cred->session_keyring)
291 # define task_session_keyring(task) (task->cred->tgcred->session_keyring)
292 # define current_session_keyring() (current->cred->tgcred->session_keyring)
297 typedef struct afs_cred {
303 struct group_info *cr_group_info;
306 typedef struct afs_cred afs_ucred_t;
307 # define afs_cr_group_info(cred) ((cred)->cr_group_info)
309 afs_set_cr_group_info(cred_t *cred, struct group_info *group_info) {
310 cred->cr_group_info = group_info;
313 # define current_group_info() (current->group_info)
314 # if !defined(task_gid)
315 # define task_gid(task) (task->gid)
317 # if !defined(task_uid)
318 # define task_uid(task) (task->uid)
320 # define task_user(task) (task->user)
321 # define task_session_keyring(task) (task->signal->session_keyring)
322 # define current_session_keyring() (current->signal->session_keyring)
323 # define crhold(c) atomic_inc(&(c)->cr_ref)
325 #endif /* defined(STRUCT_TASK_STRUCT_HAS_CRED) */
327 #if !defined(current_cred)
328 # define current_gid() (current->gid)
329 # define current_uid() (current->uid)
330 # define current_fsgid() (current->fsgid)
331 # define current_fsuid() (current->fsuid)
334 /* UIO manipulation */
335 typedef enum { AFS_UIOSYS, AFS_UIOUSER } uio_seg_t;
336 typedef enum { UIO_READ, UIO_WRITE } uio_flag_t;
338 struct iovec *uio_iov;
340 afs_offs_t uio_offset;
345 #define afsio_iov uio_iov
346 #define afsio_iovcnt uio_iovcnt
347 #define afsio_offset uio_offset
348 #define afsio_seg uio_segflg
349 #define afsio_fmode uio_fmode
350 #define afsio_resid uio_resid
352 /* Get/set the inode in the osifile struct. */
353 #define FILE_INODE(F) (F)->f_dentry->d_inode
355 #define OSIFILE_INODE(a) FILE_INODE((a)->filp)
357 #if defined(AFS_LINUX_64BIT_KERNEL) && !defined(AFS_ALPHA_LINUX_ENV) && !defined(AFS_IA64_LINUX_ENV)
358 # define NEED_IOCTL32
361 #include <linux/version.h>
362 #include <linux/sched.h>
363 #include <linux/wait.h>
365 extern struct mutex afs_global_lock;
366 extern int afs_global_owner;
368 #define AFS_GLOCK() \
370 mutex_lock(&afs_global_lock); \
371 if (afs_global_owner) \
372 osi_Panic("afs_global_lock already held by pid %d", \
374 afs_global_owner = current->pid; \
377 #define ISAFS_GLOCK() (afs_global_owner == current->pid)
379 #define AFS_GUNLOCK() \
381 if (!ISAFS_GLOCK()) \
382 osi_Panic("afs global lock not held at %s:%d", __FILE__, __LINE__); \
383 afs_global_owner = 0; \
384 mutex_unlock(&afs_global_lock); \
387 #define osi_InitGlock()
389 #ifdef AFS_AMD64_LINUX_ENV
390 /* RHEL5 beta's kernel doesn't define these. They aren't gonna change, so... */
392 # ifndef __NR_ia32_afs_syscall
393 # define __NR_ia32_afs_syscall 137
395 # ifndef __NR_ia32_setgroups
396 # define __NR_ia32_setgroups 81
398 # ifndef __NR_ia32_setgroups32
399 # define __NR_ia32_setgroups32 206
401 # ifndef __NR_ia32_close
402 # define __NR_ia32_close 6
404 # ifndef __NR_ia32_chdir
405 # define __NR_ia32_chdir 12
407 # ifndef __NR_ia32_break
408 # define __NR_ia32_break 17
410 # ifndef __NR_ia32_stty
411 # define __NR_ia32_stty 31
413 # ifndef __NR_ia32_gtty
414 # define __NR_ia32_gtty 32
416 # ifndef __NR_ia32_ftime
417 # define __NR_ia32_ftime 35
419 # ifndef __NR_ia32_prof
420 # define __NR_ia32_prof 44
422 # ifndef __NR_ia32_lock
423 # define __NR_ia32_lock 53
425 # ifndef __NR_ia32_mpx
426 # define __NR_ia32_mpx 56
428 # ifndef __NR_ia32_exit
429 # define __NR_ia32_exit 1
431 # ifndef __NR_ia32_mount
432 # define __NR_ia32_mount 21
434 # ifndef __NR_ia32_read
435 # define __NR_ia32_read 3
437 # ifndef __NR_ia32_write
438 # define __NR_ia32_write 4
440 # ifndef __NR_ia32_open
441 # define __NR_ia32_open 5
443 # ifndef __NR_ia32_close
444 # define __NR_ia32_close 6
446 # ifndef __NR_ia32_unlink
447 # define __NR_ia32_unlink 10
451 #define osi_procname(procname, size) strncpy(procname, current->comm, size)
453 #endif /* OSI_MACHDEP_H_ */