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)
78 #if defined(HAVE_LINUX_CURRENT_KERNEL_TIME)
79 static inline time_t osi_Time(void) {
80 struct timespec xtime;
81 xtime = current_kernel_time();
85 # define osi_Time() (xtime.tv_sec)
90 #ifdef AFS_LINUX_64BIT_KERNEL
91 # define osi_GetTime(V) \
93 struct timeval __afs_tv; \
94 do_gettimeofday(&__afs_tv); \
95 (V)->tv_sec = (afs_int32)__afs_tv.tv_sec; \
96 (V)->tv_usec = (afs_int32)__afs_tv.tv_usec; \
99 # define osi_GetTime(V) do_gettimeofday((V))
102 #undef gop_lookupname
103 #define gop_lookupname osi_lookupname
105 #undef gop_lookupname_user
106 #define gop_lookupname_user osi_lookupname
108 #define osi_vnhold(V, N) do { VN_HOLD(AFSTOV(V)); } while (0)
109 #define VN_HOLD(V) osi_Assert(igrab((V)) == (V))
110 #define VN_RELE(V) iput((V))
112 #define afs_suser(x) capable(CAP_SYS_ADMIN)
113 extern int afs_osi_Wakeup(void *event);
117 afs_osi_Wakeup(event);
120 #define vType(V) ((AFSTOV((V)))->i_mode & S_IFMT)
121 #define vSetType(V, type) AFSTOV((V))->i_mode = ((type) | (AFSTOV((V))->i_mode & ~S_IFMT)) /* preserve mode */
122 #define vSetVfsp(V, vfsp) /* unused */
123 #define IsAfsVnode(V) ((V)->i_sb == afs_globalVFS) /* test superblock instead */
124 #define SetAfsVnode(V) /* unnecessary */
126 #if defined(HAVE_LINUX_UACCESS_H)
127 #include <linux/uaccess.h>
129 #include <asm/uaccess.h>
132 #define copyin(F, T, C) (copy_from_user ((char*)(T), (char*)(F), (C)) > 0 ? EFAULT : 0)
133 static inline long copyinstr(char *from, char *to, int count, int *length) {
135 tmp = strncpy_from_user(to, from, count);
141 #define copyout(F, T, C) (copy_to_user ((char*)(T), (char*)(F), (C)) > 0 ? EFAULT : 0)
143 /* kernel print statements */
144 #define printf(args...) printk(args)
145 #define uprintf(args...) printk(args)
149 #define NGROUPS NGROUPS_SMALL
152 #ifdef STRUCT_GROUP_INFO_HAS_GID
153 /* compat macro for Linux 4.9 */
154 #define GROUP_AT(gi,x) ((gi)->gid[x])
157 typedef struct task_struct afs_proc_t;
159 #ifdef HAVE_LINUX_KUID_T
161 #include <linux/uidgid.h>
162 typedef kuid_t afs_kuid_t;
163 typedef kgid_t afs_kgid_t;
164 extern struct user_namespace *afs_ns;
165 # ifdef CONFIG_USER_NS
166 # define afs_current_user_ns() current_user_ns()
168 /* Here current_user_ns() expands to GPL-only init_user_ns symbol! */
169 # define afs_current_user_ns() ((struct user_namespace *)NULL)
172 static inline kuid_t afs_make_kuid(uid_t uid) {
173 return make_kuid(afs_ns, uid);
175 static inline kgid_t afs_make_kgid(gid_t gid) {
176 return make_kgid(afs_ns, gid);
178 static inline uid_t afs_from_kuid(kuid_t kuid) {
179 return from_kuid(afs_ns, kuid);
181 static inline uid_t afs_from_kgid(kgid_t kgid) {
182 return from_kgid(afs_ns, kgid);
187 typedef uid_t afs_kuid_t;
188 typedef gid_t afs_kgid_t;
190 static inline afs_kuid_t afs_make_kuid(uid_t uid) {return uid;}
191 static inline afs_kgid_t afs_make_kgid(gid_t gid) {return gid;}
192 static inline uid_t afs_from_kuid(afs_kuid_t kuid) {return kuid;}
193 static inline gid_t afs_from_kgid(afs_kgid_t kgid) {return kgid;}
194 static inline unsigned char uid_eq(uid_t a, uid_t b) {return a == b;}
195 static inline unsigned char gid_eq(gid_t a, gid_t b) {return a == b;}
196 static inline unsigned char uid_lt(uid_t a, uid_t b) {return a < b;}
197 static inline unsigned char gid_lt(gid_t a, gid_t b) {return a < b;}
198 #define GLOBAL_ROOT_UID ((afs_kuid_t) 0)
199 #define GLOBAL_ROOT_GID ((afs_kgid_t) 0)
203 /* Credentials. For newer kernels we use the kernel structure directly. */
204 #if defined(STRUCT_TASK_STRUCT_HAS_CRED)
206 typedef struct cred afs_ucred_t;
207 typedef struct cred cred_t;
209 # define afs_cr_uid(cred) (afs_from_kuid((cred)->fsuid))
210 # define afs_cr_gid(cred) (afs_from_kgid((cred)->fsgid))
211 # define afs_cr_ruid(cred) (afs_from_kuid((cred)->uid))
212 # define afs_cr_rgid(cred) (afs_from_kgid((cred)->gid))
213 # define afs_cr_group_info(cred) ((cred)->group_info)
214 # define crhold(c) (get_cred(c))
216 afs_set_cr_uid(cred_t *cred, uid_t uid) {
217 cred->fsuid = afs_make_kuid(uid);
220 afs_set_cr_gid(cred_t *cred, gid_t gid) {
221 cred->fsgid = afs_make_kgid(gid);
224 afs_set_cr_ruid(cred_t *cred, uid_t uid) {
225 cred->uid = afs_make_kuid(uid);
228 afs_set_cr_rgid(cred_t *cred, gid_t gid) {
229 cred->gid = afs_make_kgid(gid);
232 afs_set_cr_group_info(cred_t *cred, struct group_info *group_info) {
233 cred->group_info = group_info;
236 # define current_group_info() (current->cred->group_info)
237 # define task_gid(task) (task->cred->gid)
238 # define task_user(task) (task->cred->user)
239 # if defined(STRUCT_CRED_HAS_SESSION_KEYRING)
240 # define task_session_keyring(task) (task->cred->session_keyring)
241 # define current_session_keyring() (current->cred->session_keyring)
243 # define task_session_keyring(task) (task->cred->tgcred->session_keyring)
244 # define current_session_keyring() (current->cred->tgcred->session_keyring)
249 typedef struct afs_cred {
255 struct group_info *cr_group_info;
258 typedef struct afs_cred afs_ucred_t;
259 # define afs_cr_group_info(cred) ((cred)->cr_group_info)
261 afs_set_cr_group_info(cred_t *cred, struct group_info *group_info) {
262 cred->cr_group_info = group_info;
265 # define current_group_info() (current->group_info)
266 # if !defined(task_gid)
267 # define task_gid(task) (task->gid)
269 # if !defined(task_uid)
270 # define task_uid(task) (task->uid)
272 # define task_user(task) (task->user)
273 # define task_session_keyring(task) (task->signal->session_keyring)
274 # define current_session_keyring() (current->signal->session_keyring)
275 # define crhold(c) atomic_inc(&(c)->cr_ref)
277 #endif /* defined(STRUCT_TASK_STRUCT_HAS_CRED) */
279 #if !defined(current_cred)
280 # define current_gid() (current->gid)
281 # define current_uid() (current->uid)
282 # define current_fsgid() (current->fsgid)
283 # define current_fsuid() (current->fsuid)
286 /* UIO manipulation */
287 typedef enum { AFS_UIOSYS, AFS_UIOUSER } uio_seg_t;
288 typedef enum { UIO_READ, UIO_WRITE } uio_flag_t;
290 struct iovec *uio_iov;
292 afs_offs_t uio_offset;
297 #define afsio_iov uio_iov
298 #define afsio_iovcnt uio_iovcnt
299 #define afsio_offset uio_offset
300 #define afsio_seg uio_segflg
301 #define afsio_fmode uio_fmode
302 #define afsio_resid uio_resid
304 /* Get/set the inode in the osifile struct. */
305 #define FILE_INODE(F) (F)->f_dentry->d_inode
307 #define OSIFILE_INODE(a) FILE_INODE((a)->filp)
309 #if defined(AFS_LINUX_64BIT_KERNEL) && !defined(AFS_ALPHA_LINUX20_ENV) && !defined(AFS_IA64_LINUX20_ENV)
310 # define NEED_IOCTL32
313 #include <linux/version.h>
314 #include <linux/sched.h>
315 #include <linux/wait.h>
317 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
318 extern struct mutex afs_global_lock;
320 extern struct semaphore afs_global_lock;
321 # define mutex_lock(lock) down(lock)
322 # define mutex_unlock(lock) up(lock)
324 extern int afs_global_owner;
326 #define AFS_GLOCK() \
328 mutex_lock(&afs_global_lock); \
329 if (afs_global_owner) \
330 osi_Panic("afs_global_lock already held by pid %d", \
332 afs_global_owner = current->pid; \
335 #define ISAFS_GLOCK() (afs_global_owner == current->pid)
337 #define AFS_GUNLOCK() \
339 if (!ISAFS_GLOCK()) \
340 osi_Panic("afs global lock not held at %s:%d", __FILE__, __LINE__); \
341 afs_global_owner = 0; \
342 mutex_unlock(&afs_global_lock); \
345 #define osi_InitGlock()
347 #ifdef AFS_AMD64_LINUX20_ENV
348 /* RHEL5 beta's kernel doesn't define these. They aren't gonna change, so... */
350 # ifndef __NR_ia32_afs_syscall
351 # define __NR_ia32_afs_syscall 137
353 # ifndef __NR_ia32_setgroups
354 # define __NR_ia32_setgroups 81
356 # ifndef __NR_ia32_setgroups32
357 # define __NR_ia32_setgroups32 206
359 # ifndef __NR_ia32_close
360 # define __NR_ia32_close 6
362 # ifndef __NR_ia32_chdir
363 # define __NR_ia32_chdir 12
365 # ifndef __NR_ia32_break
366 # define __NR_ia32_break 17
368 # ifndef __NR_ia32_stty
369 # define __NR_ia32_stty 31
371 # ifndef __NR_ia32_gtty
372 # define __NR_ia32_gtty 32
374 # ifndef __NR_ia32_ftime
375 # define __NR_ia32_ftime 35
377 # ifndef __NR_ia32_prof
378 # define __NR_ia32_prof 44
380 # ifndef __NR_ia32_lock
381 # define __NR_ia32_lock 53
383 # ifndef __NR_ia32_mpx
384 # define __NR_ia32_mpx 56
386 # ifndef __NR_ia32_exit
387 # define __NR_ia32_exit 1
389 # ifndef __NR_ia32_mount
390 # define __NR_ia32_mount 21
392 # ifndef __NR_ia32_read
393 # define __NR_ia32_read 3
395 # ifndef __NR_ia32_write
396 # define __NR_ia32_write 4
398 # ifndef __NR_ia32_open
399 # define __NR_ia32_open 5
401 # ifndef __NR_ia32_close
402 # define __NR_ia32_close 6
404 # ifndef __NR_ia32_unlink
405 # define __NR_ia32_unlink 10
409 #define osi_procname(procname, size) strncpy(procname, current->comm, size)
411 #endif /* OSI_MACHDEP_H_ */