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)
53 #define osi_Time() (xtime.tv_sec)
54 #define osi_GetTime(V) do_gettimeofday((V))
57 #define gop_lookupname osi_lookupname
59 #define osi_vnhold(v, n) do { VN_HOLD(AFSTOV(v)); } while (0)
61 #if defined(AFS_LINUX24_ENV)
62 #define VN_HOLD(V) atomic_inc(&((vnode_t *) V)->i_count)
64 #define VN_HOLD(V) ((vnode_t *) V)->i_count++
67 #if defined(AFS_LINUX26_ENV)
68 #define VN_RELE(V) iput((struct inode *) V)
70 #define VN_RELE(V) osi_iput((struct inode *) V)
73 #define osi_AllocSmall afs_osi_Alloc
74 #define osi_FreeSmall afs_osi_Free
76 #define afs_suser(x) capable(CAP_SYS_ADMIN)
77 #define wakeup afs_osi_Wakeup
80 #define vType(V) ((( vnode_t *)V)->v_type & S_IFMT)
82 /* IsAfsVnode relies on the fast that there is only one vnodeop table for AFS.
83 * Use the same type of test as other OS's for compatibility.
86 extern struct vnodeops afs_file_iops, afs_dir_iops, afs_symlink_iops;
87 #define IsAfsVnode(v) (((v)->v_op == &afs_file_iops) ? 1 : \
88 ((v)->v_op == &afs_dir_iops) ? 1 : \
89 ((v)->v_op == &afs_symlink_iops))
91 #define SetAfsVnode(v)
93 /* We often need to pretend we're in user space to get memory transfers
94 * right for the kernel calls we use.
96 #ifdef KERNEL_SPACE_DECL
97 #undef KERNEL_SPACE_DECL
99 #undef TO_KERNEL_SPACE
101 #define KERNEL_SPACE_DECL mm_segment_t _fs_space_decl
102 #define TO_USER_SPACE() { _fs_space_decl = get_fs(); set_fs(get_ds()); }
103 #define TO_KERNEL_SPACE() set_fs(_fs_space_decl)
105 /* Backwards compatibilty macros - copyin/copyout are redone because macro
106 * inside parentheses is not evalutated.
108 #define memcpy_fromfs copy_from_user
109 #define memcpy_tofs copy_to_user
110 #define copyin(F, T, C) (copy_from_user ((char*)(T), (char*)(F), (C)), 0)
111 #define copyinstr(F, T, C, L) (copyin(F, T, C), *(L)=strlen(T), 0)
112 #define copyout(F, T, C) (copy_to_user ((char*)(T), (char*)(F), (C)), 0)
114 /* kernel print statements */
115 #define printf printk
116 #define uprintf printk
119 #define PAGESIZE PAGE_SIZE
121 #define NGROUPS NGROUPS_SMALL
125 typedef struct cred { /* maps to task field: */
131 uid_t cr_uid; /* euid */
132 uid_t cr_ruid; /* uid */
133 gid_t cr_gid; /* egid */
134 gid_t cr_rgid; /* gid */
135 #if defined(AFS_LINUX26_ENV)
136 struct group_info *cr_group_info;
138 gid_t cr_groups[NGROUPS]; /* 32 groups - empty set to NOGROUP */
142 #define AFS_UCRED cred
143 #define AFS_PROC struct task_struct
144 #define crhold(c) (c)->cr_ref++
146 /* UIO manipulation */
147 typedef enum { AFS_UIOSYS, AFS_UIOUSER } uio_seg_t;
148 typedef enum { UIO_READ, UIO_WRITE } uio_flag_t;
150 struct iovec *uio_iov;
152 afs_offs_t uio_offset;
157 #define afsio_iov uio_iov
158 #define afsio_iovcnt uio_iovcnt
159 #define afsio_offset uio_offset
160 #define afsio_seg uio_segflg
161 #define afsio_fmode uio_fmode
162 #define afsio_resid uio_resid
164 /* Get/set the inode in the osifile struct. */
165 #define FILE_INODE(F) (F)->f_dentry->d_inode
168 /* page offset is obtained and stored here during module initialization
169 * We need a variable to do this because, the PAGE_OFFSET macro defined in
170 * include/asm/page.h can change from kernel to kernel and we cannot use
171 * the hardcoded version.
173 extern unsigned long afs_linux_page_offset;
175 /* function to help with the page offset stuff */
176 #define afs_linux_page_address(page) (afs_linux_page_offset + PAGE_SIZE * (page - mem_map))
178 #if defined(__KERNEL__) && defined(CONFIG_SMP)
179 #include "../h/sched.h"
180 #include "linux/wait.h"
182 extern struct semaphore afs_global_lock;
183 extern int afs_global_owner;
185 #define AFS_GLOCK() \
187 down(&afs_global_lock); \
188 if (afs_global_owner) \
189 osi_Panic("afs_global_lock already held by pid %d", \
191 afs_global_owner = current->pid; \
194 #define ISAFS_GLOCK() (afs_global_owner == current->pid)
196 #define AFS_GUNLOCK() \
198 if (!ISAFS_GLOCK()) \
199 osi_Panic("afs global lock not held at %s:%d", __FILE__, __LINE__); \
200 afs_global_owner = 0; \
201 up(&afs_global_lock); \
207 #define AFS_GUNLOCK()
208 #define ISAFS_GLOCK() 1
209 #define AFS_ASSERT_GLOCK()
210 #define AFS_ASSERT_RXGLOCK()
213 #define AFS_RXGLOCK()
214 #define AFS_RXGUNLOCK()
215 #define ISAFS_RXGLOCK() 1
216 #endif /* OSI_MACHDEP_H_ */