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 #include <linux/version.h>
20 /* Only needed for xdr.h in glibc 2.1.x */
22 #define quad_t __quad_t
23 #define u_quad_t __u_quad_t
28 #ifdef STRUCT_TASK_STRUCT_HAS_TGID
29 #define getpid() current->tgid
30 #ifdef STRUCT_TASK_STRUCT_HAS_REAL_PARENT
31 #define getppid() current->real_parent->tgid
32 #elif defined(STRUCT_TASK_STRUCT_HAS_PARENT)
33 #define getppid() current->parent->tgid
35 #define getppid() current->p_opptr->tgid
37 #else /* !STRUCT_TASK_STRUCT_HAS_TGID */
38 #define getpid() current->pid
39 #ifdef STRUCT_TASK_STRUCT_HAS_REAL_PARENT
40 #define getppid() current->real_parent->pid
41 #elif defined(STRUCT_TASK_STRUCT_HAS_PARENT)
42 #define getppid() current->parent->pid
44 #define getppid() current->p_opptr->pid
46 #endif /* STRUCT_TASK_STRUCT_HAS_TGID */
48 #ifdef RECALC_SIGPENDING_TAKES_VOID
49 #define RECALC_SIGPENDING(X) recalc_sigpending()
51 #define RECALC_SIGPENDING(X) recalc_sigpending(X)
54 #if defined (STRUCT_TASK_STRUCT_HAS_SIGMASK_LOCK)
55 #define SIG_LOCK(X) spin_lock_irq(&X->sigmask_lock)
56 #define SIG_UNLOCK(X) spin_unlock_irq(&X->sigmask_lock)
57 #elif defined (STRUCT_TASK_STRUCT_HAS_SIGHAND)
58 #define SIG_LOCK(X) spin_lock_irq(&X->sighand->siglock)
59 #define SIG_UNLOCK(X) spin_unlock_irq(&X->sighand->siglock)
61 #define SIG_LOCK(X) spin_lock_irq(&X->sig->siglock)
62 #define SIG_UNLOCK(X) spin_unlock_irq(&X->sig->siglock)
65 #if defined (STRUCT_TASK_STRUCT_HAS_RLIM)
66 #define TASK_STRUCT_RLIM rlim
67 #elif defined (STRUCT_TASK_STRUCT_HAS_SIGNAL_RLIM)
68 #define TASK_STRUCT_RLIM signal->rlim
70 #error Not sure what to do about rlim (should be in the Linux task struct somewhere....)
76 #if defined(HAVE_CURRENT_KERNEL_TIME)
77 static inline time_t osi_Time(void) {
78 struct timespec xtime;
79 xtime = current_kernel_time();
83 #define osi_Time() (xtime.tv_sec)
88 #ifdef AFS_LINUX_64BIT_KERNEL
89 #define osi_GetTime(V) \
91 struct timeval __afs_tv; \
92 do_gettimeofday(&__afs_tv); \
93 (V)->tv_sec = (afs_int32)__afs_tv.tv_sec; \
94 (V)->tv_usec = (afs_int32)__afs_tv.tv_usec; \
97 #define osi_GetTime(V) do_gettimeofday((V))
100 #undef gop_lookupname
101 #define gop_lookupname osi_lookupname
103 #undef gop_lookupname_user
104 #define gop_lookupname_user osi_lookupname
106 #define osi_vnhold(V, N) do { VN_HOLD(AFSTOV(V)); } while (0)
107 #define VN_HOLD(V) osi_Assert(igrab((V)) == (V))
108 #define VN_RELE(V) iput((V))
110 #define afs_suser(x) capable(CAP_SYS_ADMIN)
111 #define wakeup afs_osi_Wakeup
114 #define vType(V) ((AFSTOV((V)))->i_mode & S_IFMT)
116 #define vSetType(V, type) AFSTOV((V))->i_mode = ((type) | (AFSTOV((V))->i_mode & ~S_IFMT)) /* preserve mode */
119 #define IsAfsVnode(V) ((V)->i_sb == afs_globalVFS) /* test superblock instead */
121 #define SetAfsVnode(V) /* unnecessary */
123 /* We often need to pretend we're in user space to get memory transfers
124 * right for the kernel calls we use.
126 #include <asm/uaccess.h>
128 #ifdef KERNEL_SPACE_DECL
129 #undef KERNEL_SPACE_DECL
131 #undef TO_KERNEL_SPACE
133 #define KERNEL_SPACE_DECL mm_segment_t _fs_space_decl={0}
134 #define TO_USER_SPACE() { _fs_space_decl = get_fs(); set_fs(get_ds()); }
135 #define TO_KERNEL_SPACE() set_fs(_fs_space_decl)
137 #define copyin(F, T, C) (copy_from_user ((char*)(T), (char*)(F), (C)) > 0 ? EFAULT : 0)
138 static inline long copyinstr(char *from, char *to, int count, int *length) {
140 tmp = strncpy_from_user(to, from, count);
146 #define copyout(F, T, C) (copy_to_user ((char*)(T), (char*)(F), (C)) > 0 ? EFAULT : 0)
148 /* kernel print statements */
149 #define printf printk
150 #define uprintf printk
154 #define NGROUPS NGROUPS_SMALL
158 typedef struct afs_cred { /* maps to task field: */
160 uid_t cr_uid; /* euid */
161 uid_t cr_ruid; /* uid */
162 gid_t cr_gid; /* egid */
163 gid_t cr_rgid; /* gid */
164 gid_t cr_groups[NGROUPS]; /* 32 groups - empty set to NOGROUP */
166 struct afs_cred *cr_next;
168 #define AFS_UCRED struct afs_cred
169 #define AFS_PROC struct task_struct
170 #if !defined(current_cred)
171 #define current_gid() (current->gid)
172 #define current_uid() (current->uid)
173 #define current_fsgid() (current->fsgid)
174 #define current_fsuid() (current->fsuid)
176 #if defined(STRUCT_TASK_HAS_CRED)
177 #define current_group_info() (current->cred->group_info)
178 #define task_gid(task) (task->cred->gid)
179 #define task_user(task) (task->cred->user)
180 #define task_session_keyring(task) (task->cred->tgcred->session_keyring)
181 #define current_session_keyring() (current->cred->tgcred->session_keyring)
183 #define current_group_info() (current->group_info)
184 #if !defined(task_gid)
185 #define task_gid(task) (task->gid)
187 #if !defined(task_uid)
188 #define task_uid(task) (task->uid)
190 #define task_user(task) (task->user)
191 #define task_session_keyring(task) (task->signal->session_keyring)
192 #define current_session_keyring() (current->signal->session_keyring)
194 #define crhold(c) (c)->cr_ref++
196 /* UIO manipulation */
197 typedef enum { AFS_UIOSYS, AFS_UIOUSER } uio_seg_t;
198 typedef enum { UIO_READ, UIO_WRITE } uio_flag_t;
200 struct iovec *uio_iov;
202 afs_offs_t uio_offset;
207 #define afsio_iov uio_iov
208 #define afsio_iovcnt uio_iovcnt
209 #define afsio_offset uio_offset
210 #define afsio_seg uio_segflg
211 #define afsio_fmode uio_fmode
212 #define afsio_resid uio_resid
214 /* Get/set the inode in the osifile struct. */
215 #define FILE_INODE(F) (F)->f_dentry->d_inode
217 #define OSIFILE_INODE(a) FILE_INODE(&(a)->file)
219 #if defined(AFS_LINUX_64BIT_KERNEL) && !defined(AFS_ALPHA_LINUX20_ENV) && !defined(AFS_IA64_LINUX20_ENV)
223 /* page offset is obtained and stored here during module initialization
224 * We need a variable to do this because, the PAGE_OFFSET macro defined in
225 * include/asm/page.h can change from kernel to kernel and we cannot use
226 * the hardcoded version.
228 extern unsigned long afs_linux_page_offset;
230 /* function to help with the page offset stuff */
231 #define afs_linux_page_address(page) (afs_linux_page_offset + PAGE_SIZE * (page - mem_map))
233 #if defined(__KERNEL__)
234 #include <linux/version.h>
235 #include <linux/sched.h>
236 #include <linux/wait.h>
238 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
239 extern struct mutex afs_global_lock;
241 extern struct semaphore afs_global_lock;
242 #define mutex_lock(lock) down(lock)
243 #define mutex_unlock(lock) up(lock)
245 extern int afs_global_owner;
247 #define AFS_GLOCK() \
249 mutex_lock(&afs_global_lock); \
250 if (afs_global_owner) \
251 osi_Panic("afs_global_lock already held by pid %d", \
253 afs_global_owner = current->pid; \
256 #define ISAFS_GLOCK() (afs_global_owner == current->pid)
258 #define AFS_GUNLOCK() \
260 if (!ISAFS_GLOCK()) \
261 osi_Panic("afs global lock not held at %s:%d", __FILE__, __LINE__); \
262 afs_global_owner = 0; \
263 mutex_unlock(&afs_global_lock); \
267 #define AFS_GUNLOCK()
268 #define ISAFS_GLOCK() 1
269 #define AFS_ASSERT_GLOCK()
272 #ifdef AFS_AMD64_LINUX20_ENV
273 /* RHEL5 beta's kernel doesn't define these. They aren't gonna change, so... */
275 #ifndef __NR_ia32_afs_syscall
276 #define __NR_ia32_afs_syscall 137
278 #ifndef __NR_ia32_setgroups
279 #define __NR_ia32_setgroups 81
281 #ifndef __NR_ia32_setgroups32
282 #define __NR_ia32_setgroups32 206
284 #ifndef __NR_ia32_close
285 #define __NR_ia32_close 6
287 #ifndef __NR_ia32_chdir
288 #define __NR_ia32_chdir 12
290 #ifndef __NR_ia32_break
291 #define __NR_ia32_break 17
293 #ifndef __NR_ia32_stty
294 #define __NR_ia32_stty 31
296 #ifndef __NR_ia32_gtty
297 #define __NR_ia32_gtty 32
299 #ifndef __NR_ia32_ftime
300 #define __NR_ia32_ftime 35
302 #ifndef __NR_ia32_prof
303 #define __NR_ia32_prof 44
305 #ifndef __NR_ia32_lock
306 #define __NR_ia32_lock 53
308 #ifndef __NR_ia32_mpx
309 #define __NR_ia32_mpx 56
311 #ifndef __NR_ia32_exit
312 #define __NR_ia32_exit 1
314 #ifndef __NR_ia32_mount
315 #define __NR_ia32_mount 21
317 #ifndef __NR_ia32_read
318 #define __NR_ia32_read 3
320 #ifndef __NR_ia32_write
321 #define __NR_ia32_write 4
323 #ifndef __NR_ia32_open
324 #define __NR_ia32_open 5
326 #ifndef __NR_ia32_close
327 #define __NR_ia32_close 6
329 #ifndef __NR_ia32_unlink
330 #define __NR_ia32_unlink 10
334 #endif /* OSI_MACHDEP_H_ */