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 #if !defined(HAVE_LINUX_TIME_T)
80 typedef time64_t time_t;
83 #if defined(HAVE_LINUX_KTIME_GET_COARSE_REAL_TS64)
84 static inline time_t osi_Time(void) {
85 struct timespec64 xtime;
86 ktime_get_coarse_real_ts64(&xtime);
89 #elif defined(HAVE_LINUX_CURRENT_KERNEL_TIME)
90 static inline time_t osi_Time(void) {
91 struct timespec xtime;
92 xtime = current_kernel_time();
96 # define osi_Time() (xtime.tv_sec)
99 #if defined(HAVE_LINUX_KTIME_GET_REAL_TS64)
100 # define osi_GetTime(V) \
102 struct timespec64 __afs_tv; \
103 ktime_get_real_ts64(&__afs_tv); \
104 (V)->tv_sec = (afs_int32)__afs_tv.tv_sec; \
105 (V)->tv_usec = (afs_int32)__afs_tv.tv_nsec / 1000; \
107 #elif defined(AFS_LINUX_64BIT_KERNEL)
108 # define osi_GetTime(V) \
110 struct timeval __afs_tv; \
111 do_gettimeofday(&__afs_tv); \
112 (V)->tv_sec = (afs_int32)__afs_tv.tv_sec; \
113 (V)->tv_usec = (afs_int32)__afs_tv.tv_usec; \
116 # define osi_GetTime(V) do_gettimeofday((V))
119 #undef gop_lookupname
120 #define gop_lookupname osi_lookupname
122 #undef gop_lookupname_user
123 #define gop_lookupname_user osi_lookupname
125 #define osi_vnhold(V, N) do { VN_HOLD(AFSTOV(V)); } while (0)
126 #define VN_HOLD(V) osi_Assert(igrab((V)) == (V))
127 #define VN_RELE(V) iput((V))
129 #define afs_suser(x) capable(CAP_SYS_ADMIN)
130 extern int afs_osi_Wakeup(void *event);
134 afs_osi_Wakeup(event);
137 #define vType(V) ((AFSTOV((V)))->i_mode & S_IFMT)
138 #define vSetType(V, type) AFSTOV((V))->i_mode = ((type) | (AFSTOV((V))->i_mode & ~S_IFMT)) /* preserve mode */
139 #define vSetVfsp(V, vfsp) /* unused */
140 #define IsAfsVnode(V) ((V)->i_sb == afs_globalVFS) /* test superblock instead */
141 #define SetAfsVnode(V) /* unnecessary */
143 #if defined(HAVE_LINUX_UACCESS_H)
144 #include <linux/uaccess.h>
146 #include <asm/uaccess.h>
149 #define copyin(F, T, C) (copy_from_user ((char*)(T), (char*)(F), (C)) > 0 ? EFAULT : 0)
150 static inline long copyinstr(char *from, char *to, int count, int *length) {
152 tmp = strncpy_from_user(to, from, count);
158 #define copyout(F, T, C) (copy_to_user ((char*)(T), (char*)(F), (C)) > 0 ? EFAULT : 0)
160 /* kernel print statements */
161 #define printf(args...) printk(args)
162 #define uprintf(args...) printk(args)
166 #define NGROUPS NGROUPS_SMALL
169 #ifdef STRUCT_GROUP_INFO_HAS_GID
170 /* compat macro for Linux 4.9 */
171 #define GROUP_AT(gi,x) ((gi)->gid[x])
174 typedef struct task_struct afs_proc_t;
176 #ifdef HAVE_LINUX_KUID_T
178 #include <linux/uidgid.h>
179 typedef kuid_t afs_kuid_t;
180 typedef kgid_t afs_kgid_t;
181 extern struct user_namespace *afs_ns;
182 # ifdef CONFIG_USER_NS
183 # define afs_current_user_ns() current_user_ns()
185 /* Here current_user_ns() expands to GPL-only init_user_ns symbol! */
186 # define afs_current_user_ns() ((struct user_namespace *)NULL)
189 static inline kuid_t afs_make_kuid(uid_t uid) {
190 return make_kuid(afs_ns, uid);
192 static inline kgid_t afs_make_kgid(gid_t gid) {
193 return make_kgid(afs_ns, gid);
195 static inline uid_t afs_from_kuid(kuid_t kuid) {
196 return from_kuid(afs_ns, kuid);
198 static inline uid_t afs_from_kgid(kgid_t kgid) {
199 return from_kgid(afs_ns, kgid);
204 typedef uid_t afs_kuid_t;
205 typedef gid_t afs_kgid_t;
207 static inline afs_kuid_t afs_make_kuid(uid_t uid) {return uid;}
208 static inline afs_kgid_t afs_make_kgid(gid_t gid) {return gid;}
209 static inline uid_t afs_from_kuid(afs_kuid_t kuid) {return kuid;}
210 static inline gid_t afs_from_kgid(afs_kgid_t kgid) {return kgid;}
211 static inline unsigned char uid_eq(uid_t a, uid_t b) {return a == b;}
212 static inline unsigned char gid_eq(gid_t a, gid_t b) {return a == b;}
213 static inline unsigned char uid_lt(uid_t a, uid_t b) {return a < b;}
214 static inline unsigned char gid_lt(gid_t a, gid_t b) {return a < b;}
215 #define GLOBAL_ROOT_UID ((afs_kuid_t) 0)
216 #define GLOBAL_ROOT_GID ((afs_kgid_t) 0)
220 /* Credentials. For newer kernels we use the kernel structure directly. */
221 #if defined(STRUCT_TASK_STRUCT_HAS_CRED)
223 typedef struct cred afs_ucred_t;
224 typedef struct cred cred_t;
226 # define afs_cr_uid(cred) (afs_from_kuid((cred)->fsuid))
227 # define afs_cr_gid(cred) (afs_from_kgid((cred)->fsgid))
228 # define afs_cr_ruid(cred) (afs_from_kuid((cred)->uid))
229 # define afs_cr_rgid(cred) (afs_from_kgid((cred)->gid))
230 # define afs_cr_group_info(cred) ((cred)->group_info)
231 # define crhold(c) (get_cred(c))
233 afs_set_cr_uid(cred_t *cred, uid_t uid) {
234 cred->fsuid = afs_make_kuid(uid);
237 afs_set_cr_gid(cred_t *cred, gid_t gid) {
238 cred->fsgid = afs_make_kgid(gid);
241 afs_set_cr_ruid(cred_t *cred, uid_t uid) {
242 cred->uid = afs_make_kuid(uid);
245 afs_set_cr_rgid(cred_t *cred, gid_t gid) {
246 cred->gid = afs_make_kgid(gid);
249 afs_set_cr_group_info(cred_t *cred, struct group_info *group_info) {
250 cred->group_info = group_info;
253 # define current_group_info() (current->cred->group_info)
254 # define task_gid(task) (task->cred->gid)
255 # define task_user(task) (task->cred->user)
256 # if defined(STRUCT_CRED_HAS_SESSION_KEYRING)
257 # define task_session_keyring(task) (task->cred->session_keyring)
258 # define current_session_keyring() (current->cred->session_keyring)
260 # define task_session_keyring(task) (task->cred->tgcred->session_keyring)
261 # define current_session_keyring() (current->cred->tgcred->session_keyring)
266 typedef struct afs_cred {
272 struct group_info *cr_group_info;
275 typedef struct afs_cred afs_ucred_t;
276 # define afs_cr_group_info(cred) ((cred)->cr_group_info)
278 afs_set_cr_group_info(cred_t *cred, struct group_info *group_info) {
279 cred->cr_group_info = group_info;
282 # define current_group_info() (current->group_info)
283 # if !defined(task_gid)
284 # define task_gid(task) (task->gid)
286 # if !defined(task_uid)
287 # define task_uid(task) (task->uid)
289 # define task_user(task) (task->user)
290 # define task_session_keyring(task) (task->signal->session_keyring)
291 # define current_session_keyring() (current->signal->session_keyring)
292 # define crhold(c) atomic_inc(&(c)->cr_ref)
294 #endif /* defined(STRUCT_TASK_STRUCT_HAS_CRED) */
296 #if !defined(current_cred)
297 # define current_gid() (current->gid)
298 # define current_uid() (current->uid)
299 # define current_fsgid() (current->fsgid)
300 # define current_fsuid() (current->fsuid)
303 /* UIO manipulation */
304 typedef enum { AFS_UIOSYS, AFS_UIOUSER } uio_seg_t;
305 typedef enum { UIO_READ, UIO_WRITE } uio_flag_t;
307 struct iovec *uio_iov;
309 afs_offs_t uio_offset;
314 #define afsio_iov uio_iov
315 #define afsio_iovcnt uio_iovcnt
316 #define afsio_offset uio_offset
317 #define afsio_seg uio_segflg
318 #define afsio_fmode uio_fmode
319 #define afsio_resid uio_resid
321 /* Get/set the inode in the osifile struct. */
322 #define FILE_INODE(F) (F)->f_dentry->d_inode
324 #define OSIFILE_INODE(a) FILE_INODE((a)->filp)
326 #if defined(AFS_LINUX_64BIT_KERNEL) && !defined(AFS_ALPHA_LINUX20_ENV) && !defined(AFS_IA64_LINUX20_ENV)
327 # define NEED_IOCTL32
330 #include <linux/version.h>
331 #include <linux/sched.h>
332 #include <linux/wait.h>
334 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
335 extern struct mutex afs_global_lock;
337 extern struct semaphore afs_global_lock;
338 # define mutex_lock(lock) down(lock)
339 # define mutex_unlock(lock) up(lock)
341 extern int afs_global_owner;
343 #define AFS_GLOCK() \
345 mutex_lock(&afs_global_lock); \
346 if (afs_global_owner) \
347 osi_Panic("afs_global_lock already held by pid %d", \
349 afs_global_owner = current->pid; \
352 #define ISAFS_GLOCK() (afs_global_owner == current->pid)
354 #define AFS_GUNLOCK() \
356 if (!ISAFS_GLOCK()) \
357 osi_Panic("afs global lock not held at %s:%d", __FILE__, __LINE__); \
358 afs_global_owner = 0; \
359 mutex_unlock(&afs_global_lock); \
362 #define osi_InitGlock()
364 #ifdef AFS_AMD64_LINUX20_ENV
365 /* RHEL5 beta's kernel doesn't define these. They aren't gonna change, so... */
367 # ifndef __NR_ia32_afs_syscall
368 # define __NR_ia32_afs_syscall 137
370 # ifndef __NR_ia32_setgroups
371 # define __NR_ia32_setgroups 81
373 # ifndef __NR_ia32_setgroups32
374 # define __NR_ia32_setgroups32 206
376 # ifndef __NR_ia32_close
377 # define __NR_ia32_close 6
379 # ifndef __NR_ia32_chdir
380 # define __NR_ia32_chdir 12
382 # ifndef __NR_ia32_break
383 # define __NR_ia32_break 17
385 # ifndef __NR_ia32_stty
386 # define __NR_ia32_stty 31
388 # ifndef __NR_ia32_gtty
389 # define __NR_ia32_gtty 32
391 # ifndef __NR_ia32_ftime
392 # define __NR_ia32_ftime 35
394 # ifndef __NR_ia32_prof
395 # define __NR_ia32_prof 44
397 # ifndef __NR_ia32_lock
398 # define __NR_ia32_lock 53
400 # ifndef __NR_ia32_mpx
401 # define __NR_ia32_mpx 56
403 # ifndef __NR_ia32_exit
404 # define __NR_ia32_exit 1
406 # ifndef __NR_ia32_mount
407 # define __NR_ia32_mount 21
409 # ifndef __NR_ia32_read
410 # define __NR_ia32_read 3
412 # ifndef __NR_ia32_write
413 # define __NR_ia32_write 4
415 # ifndef __NR_ia32_open
416 # define __NR_ia32_open 5
418 # ifndef __NR_ia32_close
419 # define __NR_ia32_close 6
421 # ifndef __NR_ia32_unlink
422 # define __NR_ia32_unlink 10
426 #define osi_procname(procname, size) strncpy(procname, current->comm, size)
428 #endif /* OSI_MACHDEP_H_ */