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 #define getpid() current->pid
27 #ifdef STRUCT_TASK_STRUCT_HAS_REAL_PARENT
28 #define getppid() current->real_parent->pid
30 #define getppid() current->p_opptr->pid
33 #ifdef RECALC_SIGPENDING_TAKES_VOID
34 #define RECALC_SIGPENDING(X) recalc_sigpending()
36 #define RECALC_SIGPENDING(X) recalc_sigpending(X)
39 #if defined (STRUCT_TASK_STRUCT_HAS_SIGMASK_LOCK)
40 #define SIG_LOCK(X) spin_lock_irq(&X->sigmask_lock)
41 #define SIG_UNLOCK(X) spin_unlock_irq(&X->sigmask_lock)
42 #elif defined (STRUCT_TASK_STRUCT_HAS_SIGHAND)
43 #define SIG_LOCK(X) spin_lock_irq(&X->sighand->siglock)
44 #define SIG_UNLOCK(X) spin_unlock_irq(&X->sighand->siglock)
46 #define SIG_LOCK(X) spin_lock_irq(&X->sig->siglock)
47 #define SIG_UNLOCK(X) spin_unlock_irq(&X->sig->siglock)
50 #if defined (STRUCT_TASK_STRUCT_HAS_RLIM)
51 #define TASK_STRUCT_RLIM rlim
52 #elif defined (STRUCT_TASK_STRUCT_HAS_SIGNAL_RLIM)
53 #define TASK_STRUCT_RLIM signal->rlim
55 #error Not sure what to do about rlim (should be in the Linux task struct somewhere....)
61 #define osi_Time() (xtime.tv_sec)
62 #ifdef AFS_LINUX_64BIT_KERNEL
63 #define osi_GetTime(V) \
65 struct timeval __afs_tv; \
66 do_gettimeofday(&__afs_tv); \
67 (V)->tv_sec = (afs_int32)__afs_tv.tv_sec; \
68 (V)->tv_usec = (afs_int32)__afs_tv.tv_usec; \
71 #define osi_GetTime(V) do_gettimeofday((V))
75 #define gop_lookupname osi_lookupname
77 #define osi_vnhold(v, n) do { VN_HOLD(AFSTOV(v)); } while (0)
79 #if defined(AFS_LINUX24_ENV)
80 #define VN_HOLD(V) atomic_inc(&((vnode_t *) V)->i_count)
82 #define VN_HOLD(V) ((vnode_t *) V)->i_count++
85 #if defined(AFS_LINUX26_ENV)
86 #define VN_RELE(V) iput((struct inode *) V)
88 #define VN_RELE(V) osi_iput((struct inode *) V)
91 #define osi_AllocSmall afs_osi_Alloc
92 #define osi_FreeSmall afs_osi_Free
94 #define afs_suser(x) capable(CAP_SYS_ADMIN)
95 #define wakeup afs_osi_Wakeup
98 #define vType(V) ((( vnode_t *)V)->v_type & S_IFMT)
100 /* IsAfsVnode relies on the fast that there is only one vnodeop table for AFS.
101 * Use the same type of test as other OS's for compatibility.
104 extern struct vnodeops afs_file_iops, afs_dir_iops, afs_symlink_iops;
105 #define IsAfsVnode(v) (((v)->v_op == &afs_file_iops) ? 1 : \
106 ((v)->v_op == &afs_dir_iops) ? 1 : \
107 ((v)->v_op == &afs_symlink_iops))
109 #define SetAfsVnode(v)
111 /* We often need to pretend we're in user space to get memory transfers
112 * right for the kernel calls we use.
114 #ifdef KERNEL_SPACE_DECL
115 #undef KERNEL_SPACE_DECL
117 #undef TO_KERNEL_SPACE
119 #define KERNEL_SPACE_DECL mm_segment_t _fs_space_decl
120 #define TO_USER_SPACE() { _fs_space_decl = get_fs(); set_fs(get_ds()); }
121 #define TO_KERNEL_SPACE() set_fs(_fs_space_decl)
123 /* Backwards compatibilty macros - copyin/copyout are redone because macro
124 * inside parentheses is not evalutated.
126 #define memcpy_fromfs copy_from_user
127 #define memcpy_tofs copy_to_user
128 #define copyin(F, T, C) (copy_from_user ((char*)(T), (char*)(F), (C)), 0)
129 #define copyinstr(F, T, C, L) (copyin(F, T, C), *(L)=strlen(T), 0)
130 #define copyout(F, T, C) (copy_to_user ((char*)(T), (char*)(F), (C)), 0)
132 /* kernel print statements */
133 #define printf printk
134 #define uprintf printk
137 #define PAGESIZE PAGE_SIZE
139 #define NGROUPS NGROUPS_SMALL
143 typedef struct cred { /* maps to task field: */
145 uid_t cr_uid; /* euid */
146 uid_t cr_ruid; /* uid */
147 gid_t cr_gid; /* egid */
148 gid_t cr_rgid; /* gid */
149 #if defined(AFS_LINUX26_ENV)
150 struct group_info *cr_group_info;
152 gid_t cr_groups[NGROUPS]; /* 32 groups - empty set to NOGROUP */
155 struct cred *cr_next;
157 #define AFS_UCRED cred
158 #define AFS_PROC struct task_struct
159 #define crhold(c) (c)->cr_ref++
161 /* UIO manipulation */
162 typedef enum { AFS_UIOSYS, AFS_UIOUSER } uio_seg_t;
163 typedef enum { UIO_READ, UIO_WRITE } uio_flag_t;
165 struct iovec *uio_iov;
167 afs_offs_t uio_offset;
172 #define afsio_iov uio_iov
173 #define afsio_iovcnt uio_iovcnt
174 #define afsio_offset uio_offset
175 #define afsio_seg uio_segflg
176 #define afsio_fmode uio_fmode
177 #define afsio_resid uio_resid
179 /* Get/set the inode in the osifile struct. */
180 #define FILE_INODE(F) (F)->f_dentry->d_inode
182 #if defined(AFS_LINUX_64BIT_KERNEL) && !defined(AFS_ALPHA_LINUX20_ENV) && !defined(AFS_IA64_LINUX20_ENV)
186 /* page offset is obtained and stored here during module initialization
187 * We need a variable to do this because, the PAGE_OFFSET macro defined in
188 * include/asm/page.h can change from kernel to kernel and we cannot use
189 * the hardcoded version.
191 extern unsigned long afs_linux_page_offset;
193 /* function to help with the page offset stuff */
194 #define afs_linux_page_address(page) (afs_linux_page_offset + PAGE_SIZE * (page - mem_map))
196 #if defined(__KERNEL__) && defined(CONFIG_SMP)
197 #include "../h/sched.h"
198 #include "linux/wait.h"
200 extern struct semaphore afs_global_lock;
201 extern int afs_global_owner;
203 #define AFS_GLOCK() \
205 down(&afs_global_lock); \
206 if (afs_global_owner) \
207 osi_Panic("afs_global_lock already held by pid %d", \
209 afs_global_owner = current->pid; \
212 #define ISAFS_GLOCK() (afs_global_owner == current->pid)
214 #define AFS_GUNLOCK() \
216 if (!ISAFS_GLOCK()) \
217 osi_Panic("afs global lock not held at %s:%d", __FILE__, __LINE__); \
218 afs_global_owner = 0; \
219 up(&afs_global_lock); \
225 #define AFS_GUNLOCK()
226 #define ISAFS_GLOCK() 1
227 #define AFS_ASSERT_GLOCK()
228 #define AFS_ASSERT_RXGLOCK()
231 #define AFS_RXGLOCK()
232 #define AFS_RXGUNLOCK()
233 #define ISAFS_RXGLOCK() 1
234 #endif /* OSI_MACHDEP_H_ */