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>
19 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,4)
20 #define AFS_LINUX26_ONEGROUP_ENV 1
23 /* Only needed for xdr.h in glibc 2.1.x */
25 #define quad_t __quad_t
26 #define u_quad_t __u_quad_t
31 #define getpid() current->pid
32 #ifdef STRUCT_TASK_STRUCT_HAS_REAL_PARENT
33 #define getppid() current->real_parent->pid
34 #elif defined(STRUCT_TASK_STRUCT_HAS_PARENT)
35 #define getppid() current->parent->pid
37 #define getppid() current->p_opptr->pid
40 #ifdef RECALC_SIGPENDING_TAKES_VOID
41 #define RECALC_SIGPENDING(X) recalc_sigpending()
43 #define RECALC_SIGPENDING(X) recalc_sigpending(X)
46 #if defined (STRUCT_TASK_STRUCT_HAS_SIGMASK_LOCK)
47 #define SIG_LOCK(X) spin_lock_irq(&X->sigmask_lock)
48 #define SIG_UNLOCK(X) spin_unlock_irq(&X->sigmask_lock)
49 #elif defined (STRUCT_TASK_STRUCT_HAS_SIGHAND)
50 #define SIG_LOCK(X) spin_lock_irq(&X->sighand->siglock)
51 #define SIG_UNLOCK(X) spin_unlock_irq(&X->sighand->siglock)
53 #define SIG_LOCK(X) spin_lock_irq(&X->sig->siglock)
54 #define SIG_UNLOCK(X) spin_unlock_irq(&X->sig->siglock)
57 #if defined (STRUCT_TASK_STRUCT_HAS_RLIM)
58 #define TASK_STRUCT_RLIM rlim
59 #elif defined (STRUCT_TASK_STRUCT_HAS_SIGNAL_RLIM)
60 #define TASK_STRUCT_RLIM signal->rlim
62 #error Not sure what to do about rlim (should be in the Linux task struct somewhere....)
68 #define osi_Time() (xtime.tv_sec)
69 #ifdef AFS_LINUX_64BIT_KERNEL
70 #define osi_GetTime(V) \
72 struct timeval __afs_tv; \
73 do_gettimeofday(&__afs_tv); \
74 (V)->tv_sec = (afs_int32)__afs_tv.tv_sec; \
75 (V)->tv_usec = (afs_int32)__afs_tv.tv_usec; \
78 #define osi_GetTime(V) do_gettimeofday((V))
82 #define gop_lookupname osi_lookupname
84 #define osi_vnhold(V, N) do { VN_HOLD(AFSTOV(V)); } while (0)
85 #define VN_HOLD(V) osi_Assert(igrab((V)) == (V))
86 #define VN_RELE(V) iput((V))
88 #define afs_suser(x) capable(CAP_SYS_ADMIN)
89 #define wakeup afs_osi_Wakeup
92 #define vType(V) ((AFSTOV((V)))->i_mode & S_IFMT)
94 #define vSetType(V, type) AFSTOV((V))->i_mode = ((type) | (AFSTOV((V))->i_mode & ~S_IFMT)) /* preserve mode */
97 #define IsAfsVnode(V) ((V)->i_sb == afs_globalVFS) /* test superblock instead */
99 #define SetAfsVnode(V) /* unnecessary */
101 /* We often need to pretend we're in user space to get memory transfers
102 * right for the kernel calls we use.
104 #include <asm/uaccess.h>
106 #ifdef KERNEL_SPACE_DECL
107 #undef KERNEL_SPACE_DECL
109 #undef TO_KERNEL_SPACE
111 #define KERNEL_SPACE_DECL mm_segment_t _fs_space_decl
112 #define TO_USER_SPACE() { _fs_space_decl = get_fs(); set_fs(get_ds()); }
113 #define TO_KERNEL_SPACE() set_fs(_fs_space_decl)
115 #define copyin(F, T, C) (copy_from_user ((char*)(T), (char*)(F), (C)) > 0 ? EFAULT : 0)
116 static inline long copyinstr(char *from, char *to, int count, int *length) {
118 tmp = strncpy_from_user(to, from, count);
124 #define copyout(F, T, C) (copy_to_user ((char*)(T), (char*)(F), (C)) > 0 ? EFAULT : 0)
126 /* kernel print statements */
127 #define printf printk
128 #define uprintf printk
132 #define NGROUPS NGROUPS_SMALL
136 typedef struct cred { /* maps to task field: */
138 uid_t cr_uid; /* euid */
139 uid_t cr_ruid; /* uid */
140 gid_t cr_gid; /* egid */
141 gid_t cr_rgid; /* gid */
142 #if defined(AFS_LINUX26_ENV)
143 struct group_info *cr_group_info;
145 gid_t cr_groups[NGROUPS]; /* 32 groups - empty set to NOGROUP */
148 struct cred *cr_next;
150 #define AFS_UCRED cred
151 #define AFS_PROC struct task_struct
152 #define crhold(c) (c)->cr_ref++
154 /* UIO manipulation */
155 typedef enum { AFS_UIOSYS, AFS_UIOUSER } uio_seg_t;
156 typedef enum { UIO_READ, UIO_WRITE } uio_flag_t;
158 struct iovec *uio_iov;
160 afs_offs_t uio_offset;
165 #define afsio_iov uio_iov
166 #define afsio_iovcnt uio_iovcnt
167 #define afsio_offset uio_offset
168 #define afsio_seg uio_segflg
169 #define afsio_fmode uio_fmode
170 #define afsio_resid uio_resid
172 /* Get/set the inode in the osifile struct. */
173 #define FILE_INODE(F) (F)->f_dentry->d_inode
175 #ifdef AFS_LINUX26_ENV
176 #define OSIFILE_INODE(a) FILE_INODE((a)->filp)
178 #define OSIFILE_INODE(a) FILE_INODE(&(a)->file)
181 #if defined(AFS_LINUX_64BIT_KERNEL) && !defined(AFS_ALPHA_LINUX20_ENV) && !defined(AFS_IA64_LINUX20_ENV)
185 /* page offset is obtained and stored here during module initialization
186 * We need a variable to do this because, the PAGE_OFFSET macro defined in
187 * include/asm/page.h can change from kernel to kernel and we cannot use
188 * the hardcoded version.
190 extern unsigned long afs_linux_page_offset;
192 /* function to help with the page offset stuff */
193 #define afs_linux_page_address(page) (afs_linux_page_offset + PAGE_SIZE * (page - mem_map))
195 #if defined(__KERNEL__)
196 #include <linux/version.h>
197 #include <linux/sched.h>
198 #include <linux/wait.h>
200 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
201 extern struct mutex afs_global_lock;
203 extern struct semaphore afs_global_lock;
204 #define mutex_lock(lock) down(lock)
205 #define mutex_unlock(lock) up(lock)
207 extern int afs_global_owner;
209 #define AFS_GLOCK() \
211 mutex_lock(&afs_global_lock); \
212 if (afs_global_owner) \
213 osi_Panic("afs_global_lock already held by pid %d", \
215 afs_global_owner = current->pid; \
218 #define ISAFS_GLOCK() (afs_global_owner == current->pid)
220 #define AFS_GUNLOCK() \
222 if (!ISAFS_GLOCK()) \
223 osi_Panic("afs global lock not held at %s:%d", __FILE__, __LINE__); \
224 afs_global_owner = 0; \
225 mutex_unlock(&afs_global_lock); \
229 #define AFS_GUNLOCK()
230 #define ISAFS_GLOCK() 1
231 #define AFS_ASSERT_GLOCK()
234 #ifdef AFS_AMD64_LINUX20_ENV
235 /* RHEL5 beta's kernel doesn't define these. They aren't gonna change, so... */
237 #ifndef __NR_ia32_afs_syscall
238 #define __NR_ia32_afs_syscall 137
240 #ifndef __NR_ia32_setgroups
241 #define __NR_ia32_setgroups 81
243 #ifndef __NR_ia32_setgroups32
244 #define __NR_ia32_setgroups32 206
246 #ifndef __NR_ia32_close
247 #define __NR_ia32_close 6
249 #ifndef __NR_ia32_chdir
250 #define __NR_ia32_chdir 12
252 #ifndef __NR_ia32_break
253 #define __NR_ia32_break 17
255 #ifndef __NR_ia32_stty
256 #define __NR_ia32_stty 31
258 #ifndef __NR_ia32_gtty
259 #define __NR_ia32_gtty 32
261 #ifndef __NR_ia32_ftime
262 #define __NR_ia32_ftime 35
264 #ifndef __NR_ia32_prof
265 #define __NR_ia32_prof 44
267 #ifndef __NR_ia32_lock
268 #define __NR_ia32_lock 53
270 #ifndef __NR_ia32_mpx
271 #define __NR_ia32_mpx 56
273 #ifndef __NR_ia32_exit
274 #define __NR_ia32_exit 1
276 #ifndef __NR_ia32_mount
277 #define __NR_ia32_mount 21
279 #ifndef __NR_ia32_read
280 #define __NR_ia32_read 3
282 #ifndef __NR_ia32_write
283 #define __NR_ia32_write 4
285 #ifndef __NR_ia32_open
286 #define __NR_ia32_open 5
288 #ifndef __NR_ia32_close
289 #define __NR_ia32_close 6
291 #ifndef __NR_ia32_unlink
292 #define __NR_ia32_unlink 10
296 #endif /* OSI_MACHDEP_H_ */