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_LINUX20_ENV) && !defined(AFS_IA64_LINUX20_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_LINUX26_ENV)
172 return test_thread_flag(TIF_32BIT);
173 # elif defined(AFS_SPARC64_LINUX24_ENV)
174 return (current->thread.flags & SPARC_FLAG_32BIT) != 0;
175 # elif defined(AFS_SPARC64_LINUX20_ENV)
176 return (current->tss.flags & SPARC_FLAG_32BIT) != 0;
177 # elif defined(AFS_AMD64_LINUX26_ENV)
178 return test_thread_flag(TIF_IA32);
179 # elif defined(AFS_AMD64_LINUX20_ENV)
180 return (current->thread.flags & THREAD_IA32) != 0;
181 # elif defined(AFS_PPC64_LINUX26_ENV)
182 # if defined(STRUCT_TASK_STRUCT_HAS_THREAD_INFO)
183 return (current->thread_info->flags & _TIF_32BIT) != 0;
185 return (task_thread_info(current)->flags & _TIF_32BIT) != 0;
187 # elif defined(AFS_PPC64_LINUX20_ENV)
188 return (current->thread.flags & PPC_FLAG_32BIT) != 0;
189 # elif defined(AFS_S390X_LINUX26_ENV)
190 return test_thread_flag(TIF_31BIT);
191 # elif defined(AFS_S390X_LINUX20_ENV)
192 return (current->thread.flags & S390_FLAG_31BIT) != 0;
193 # elif defined(AFS_ARM64_LINUX26_ENV)
194 return is_compat_task();
196 # error afs_in_compat_syscall not done for this linux
199 #endif /* AFS_LINUX_64BIT_KERNEL */
201 /* kernel print statements */
202 #define printf(args...) printk(args)
203 #define uprintf(args...) printk(args)
207 #define NGROUPS NGROUPS_SMALL
210 #ifdef STRUCT_GROUP_INFO_HAS_GID
211 /* compat macro for Linux 4.9 */
212 #define GROUP_AT(gi,x) ((gi)->gid[x])
215 typedef struct task_struct afs_proc_t;
217 #ifdef HAVE_LINUX_KUID_T
219 #include <linux/uidgid.h>
220 typedef kuid_t afs_kuid_t;
221 typedef kgid_t afs_kgid_t;
222 extern struct user_namespace *afs_ns;
223 # ifdef CONFIG_USER_NS
224 # define afs_current_user_ns() current_user_ns()
226 /* Here current_user_ns() expands to GPL-only init_user_ns symbol! */
227 # define afs_current_user_ns() ((struct user_namespace *)NULL)
230 static inline kuid_t afs_make_kuid(uid_t uid) {
231 return make_kuid(afs_ns, uid);
233 static inline kgid_t afs_make_kgid(gid_t gid) {
234 return make_kgid(afs_ns, gid);
236 static inline uid_t afs_from_kuid(kuid_t kuid) {
237 return from_kuid(afs_ns, kuid);
239 static inline uid_t afs_from_kgid(kgid_t kgid) {
240 return from_kgid(afs_ns, kgid);
245 typedef uid_t afs_kuid_t;
246 typedef gid_t afs_kgid_t;
248 static inline afs_kuid_t afs_make_kuid(uid_t uid) {return uid;}
249 static inline afs_kgid_t afs_make_kgid(gid_t gid) {return gid;}
250 static inline uid_t afs_from_kuid(afs_kuid_t kuid) {return kuid;}
251 static inline gid_t afs_from_kgid(afs_kgid_t kgid) {return kgid;}
252 static inline unsigned char uid_eq(uid_t a, uid_t b) {return a == b;}
253 static inline unsigned char gid_eq(gid_t a, gid_t b) {return a == b;}
254 static inline unsigned char uid_lt(uid_t a, uid_t b) {return a < b;}
255 static inline unsigned char gid_lt(gid_t a, gid_t b) {return a < b;}
256 #define GLOBAL_ROOT_UID ((afs_kuid_t) 0)
257 #define GLOBAL_ROOT_GID ((afs_kgid_t) 0)
261 /* Credentials. For newer kernels we use the kernel structure directly. */
262 #if defined(STRUCT_TASK_STRUCT_HAS_CRED)
264 typedef struct cred afs_ucred_t;
265 typedef struct cred cred_t;
267 # define afs_cr_uid(cred) (afs_from_kuid((cred)->fsuid))
268 # define afs_cr_gid(cred) (afs_from_kgid((cred)->fsgid))
269 # define afs_cr_ruid(cred) (afs_from_kuid((cred)->uid))
270 # define afs_cr_rgid(cred) (afs_from_kgid((cred)->gid))
271 # define afs_cr_group_info(cred) ((cred)->group_info)
272 # define crhold(c) (get_cred(c))
274 afs_set_cr_uid(cred_t *cred, uid_t uid) {
275 cred->fsuid = afs_make_kuid(uid);
278 afs_set_cr_gid(cred_t *cred, gid_t gid) {
279 cred->fsgid = afs_make_kgid(gid);
282 afs_set_cr_ruid(cred_t *cred, uid_t uid) {
283 cred->uid = afs_make_kuid(uid);
286 afs_set_cr_rgid(cred_t *cred, gid_t gid) {
287 cred->gid = afs_make_kgid(gid);
290 afs_set_cr_group_info(cred_t *cred, struct group_info *group_info) {
291 cred->group_info = group_info;
294 # define current_group_info() (current->cred->group_info)
295 # define task_gid(task) (task->cred->gid)
296 # define task_user(task) (task->cred->user)
297 # if defined(STRUCT_CRED_HAS_SESSION_KEYRING)
298 # define task_session_keyring(task) (task->cred->session_keyring)
299 # define current_session_keyring() (current->cred->session_keyring)
301 # define task_session_keyring(task) (task->cred->tgcred->session_keyring)
302 # define current_session_keyring() (current->cred->tgcred->session_keyring)
307 typedef struct afs_cred {
313 struct group_info *cr_group_info;
316 typedef struct afs_cred afs_ucred_t;
317 # define afs_cr_group_info(cred) ((cred)->cr_group_info)
319 afs_set_cr_group_info(cred_t *cred, struct group_info *group_info) {
320 cred->cr_group_info = group_info;
323 # define current_group_info() (current->group_info)
324 # if !defined(task_gid)
325 # define task_gid(task) (task->gid)
327 # if !defined(task_uid)
328 # define task_uid(task) (task->uid)
330 # define task_user(task) (task->user)
331 # define task_session_keyring(task) (task->signal->session_keyring)
332 # define current_session_keyring() (current->signal->session_keyring)
333 # define crhold(c) atomic_inc(&(c)->cr_ref)
335 #endif /* defined(STRUCT_TASK_STRUCT_HAS_CRED) */
337 #if !defined(current_cred)
338 # define current_gid() (current->gid)
339 # define current_uid() (current->uid)
340 # define current_fsgid() (current->fsgid)
341 # define current_fsuid() (current->fsuid)
344 /* UIO manipulation */
345 typedef enum { AFS_UIOSYS, AFS_UIOUSER } uio_seg_t;
346 typedef enum { UIO_READ, UIO_WRITE } uio_flag_t;
348 struct iovec *uio_iov;
350 afs_offs_t uio_offset;
355 #define afsio_iov uio_iov
356 #define afsio_iovcnt uio_iovcnt
357 #define afsio_offset uio_offset
358 #define afsio_seg uio_segflg
359 #define afsio_fmode uio_fmode
360 #define afsio_resid uio_resid
362 /* Get/set the inode in the osifile struct. */
363 #define FILE_INODE(F) (F)->f_dentry->d_inode
365 #define OSIFILE_INODE(a) FILE_INODE((a)->filp)
367 #if defined(AFS_LINUX_64BIT_KERNEL) && !defined(AFS_ALPHA_LINUX20_ENV) && !defined(AFS_IA64_LINUX20_ENV)
368 # define NEED_IOCTL32
371 #include <linux/version.h>
372 #include <linux/sched.h>
373 #include <linux/wait.h>
375 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
376 extern struct mutex afs_global_lock;
378 extern struct semaphore afs_global_lock;
379 # define mutex_lock(lock) down(lock)
380 # define mutex_unlock(lock) up(lock)
382 extern int afs_global_owner;
384 #define AFS_GLOCK() \
386 mutex_lock(&afs_global_lock); \
387 if (afs_global_owner) \
388 osi_Panic("afs_global_lock already held by pid %d", \
390 afs_global_owner = current->pid; \
393 #define ISAFS_GLOCK() (afs_global_owner == current->pid)
395 #define AFS_GUNLOCK() \
397 if (!ISAFS_GLOCK()) \
398 osi_Panic("afs global lock not held at %s:%d", __FILE__, __LINE__); \
399 afs_global_owner = 0; \
400 mutex_unlock(&afs_global_lock); \
403 #define osi_InitGlock()
405 #ifdef AFS_AMD64_LINUX20_ENV
406 /* RHEL5 beta's kernel doesn't define these. They aren't gonna change, so... */
408 # ifndef __NR_ia32_afs_syscall
409 # define __NR_ia32_afs_syscall 137
411 # ifndef __NR_ia32_setgroups
412 # define __NR_ia32_setgroups 81
414 # ifndef __NR_ia32_setgroups32
415 # define __NR_ia32_setgroups32 206
417 # ifndef __NR_ia32_close
418 # define __NR_ia32_close 6
420 # ifndef __NR_ia32_chdir
421 # define __NR_ia32_chdir 12
423 # ifndef __NR_ia32_break
424 # define __NR_ia32_break 17
426 # ifndef __NR_ia32_stty
427 # define __NR_ia32_stty 31
429 # ifndef __NR_ia32_gtty
430 # define __NR_ia32_gtty 32
432 # ifndef __NR_ia32_ftime
433 # define __NR_ia32_ftime 35
435 # ifndef __NR_ia32_prof
436 # define __NR_ia32_prof 44
438 # ifndef __NR_ia32_lock
439 # define __NR_ia32_lock 53
441 # ifndef __NR_ia32_mpx
442 # define __NR_ia32_mpx 56
444 # ifndef __NR_ia32_exit
445 # define __NR_ia32_exit 1
447 # ifndef __NR_ia32_mount
448 # define __NR_ia32_mount 21
450 # ifndef __NR_ia32_read
451 # define __NR_ia32_read 3
453 # ifndef __NR_ia32_write
454 # define __NR_ia32_write 4
456 # ifndef __NR_ia32_open
457 # define __NR_ia32_open 5
459 # ifndef __NR_ia32_close
460 # define __NR_ia32_close 6
462 # ifndef __NR_ia32_unlink
463 # define __NR_ia32_unlink 10
467 #define osi_procname(procname, size) strncpy(procname, current->comm, size)
469 #endif /* OSI_MACHDEP_H_ */