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 #define getppid() current->p_opptr->pid
31 #include "../h/sched.h"
32 #define osi_Time() (xtime.tv_sec)
34 #define osi_GetTime(V) do { (*(V)).tv_sec = xtime.tv_sec; (*(V)).tv_usec = xtime.tv_usec; } while (0)
36 #define osi_GetTime(V) (*(V)=xtime)
40 #define gop_lookupname osi_lookupname
42 #define osi_vnhold(v, n) VN_HOLD(v)
44 #define osi_AllocSmall afs_osi_Alloc
45 #define osi_FreeSmall afs_osi_Free
47 #define afs_suser suser
48 #define wakeup afs_osi_Wakeup
51 #define vType(V) ((( vnode_t *)V)->v_type & S_IFMT)
53 /* IsAfsVnode relies on the fast that there is only one vnodeop table for AFS.
54 * Use the same type of test as other OS's for compatibility.
57 extern struct vnodeops afs_dir_iops, afs_symlink_iops;
58 #define IsAfsVnode(vc) (((vc)->v_op == afs_ops) ? 1 : \
59 ((vc)->v_op == &afs_dir_iops) ? 1 : \
60 ((vc)->v_op == &afs_symlink_iops))
63 /* bcopy is in stds.h, just so fcrypt.c can pick it up. */
64 #define bzero(D,C) memset((D), 0, (C))
65 #define bcmp(A,B,C) memcmp((A), (B), (C))
68 /* We often need to pretend we're in user space to get memory transfers
69 * right for the kernel calls we use.
71 #ifdef KERNEL_SPACE_DECL
72 #undef KERNEL_SPACE_DECL
74 #undef TO_KERNEL_SPACE
76 #define KERNEL_SPACE_DECL mm_segment_t _fs_space_decl
77 #define TO_USER_SPACE() { _fs_space_decl = get_fs(); set_fs(get_ds()); }
78 #define TO_KERNEL_SPACE() set_fs(_fs_space_decl)
80 /* Backwards compatibilty macros - copyin/copyout are redone because macro
81 * inside parentheses is not evalutated.
83 #define memcpy_fromfs copy_from_user
84 #define memcpy_tofs copy_to_user
85 #define copyin(F, T, C) (copy_from_user ((char*)(T), (char*)(F), (C)), 0)
86 #define copyinstr(F, T, C, L) (copyin(F, T, C), *(L)=strlen(T), 0)
87 #define copyout(F, T, C) (copy_to_user ((char*)(T), (char*)(F), (C)), 0)
89 /* kernel print statements */
91 #define uprintf printk
94 #define PAGESIZE PAGE_SIZE
97 typedef struct cred { /* maps to task field: */
103 uid_t cr_uid; /* euid */
104 uid_t cr_ruid; /* uid */
105 gid_t cr_gid; /* egid */
106 gid_t cr_rgid; /* gid */
107 gid_t cr_groups[NGROUPS]; /* 32 groups - empty set to NOGROUP */
110 #define AFS_UCRED cred
111 #define crhold(c) (c)->cr_ref++
113 /* UIO manipulation */
114 typedef enum { AFS_UIOSYS, AFS_UIOUSER } uio_seg_t;
115 typedef enum { UIO_READ, UIO_WRITE } uio_flag_t;
117 struct iovec *uio_iov;
119 afs_offs_t uio_offset;
124 #define afsio_iov uio_iov
125 #define afsio_iovcnt uio_iovcnt
126 #define afsio_offset uio_offset
127 #define afsio_seg uio_segflg
128 #define afsio_fmode uio_fmode
129 #define afsio_resid uio_resid
131 /* Get/set the inode in the osifile struct. */
132 #define FILE_INODE(F) (F)->f_dentry->d_inode
135 /* page offset is obtained and stored here during module initialization
136 * We need a variable to do this because, the PAGE_OFFSET macro defined in
137 * include/asm/page.h can change from kernel to kernel and we cannot use
138 * the hardcoded version.
140 extern unsigned long afs_linux_page_offset;
142 /* some more functions to help with the page offset stuff */
143 #define AFS_LINUX_MAP_NR(addr) ((((unsigned long)addr) - afs_linux_page_offset) >> PAGE_SHIFT)
145 #define afs_linux_page_address(page) (afs_linux_page_offset + PAGE_SIZE * (page - mem_map))
147 #if defined(__KERNEL__) && defined(CONFIG_SMP)
148 #include "linux/wait.h"
150 extern struct semaphore afs_global_lock;
151 extern int afs_global_owner;
153 #define AFS_GLOCK() \
155 down(&afs_global_lock); \
156 if (afs_global_owner) \
157 osi_Panic("afs_global_lock already held by pid %d", \
159 afs_global_owner = current->pid; \
162 #define ISAFS_GLOCK() (afs_global_owner == current->pid)
164 #define AFS_GUNLOCK() \
166 if (!ISAFS_GLOCK()) \
167 osi_Panic("afs global lock not held"); \
168 afs_global_owner = 0; \
169 up(&afs_global_lock); \
175 #define AFS_GUNLOCK()
176 #define ISAFS_GLOCK() 1
177 #define AFS_ASSERT_GLOCK()
178 #define AFS_ASSERT_RXGLOCK()
181 #define AFS_RXGLOCK()
182 #define AFS_RXGUNLOCK()
183 #define ISAFS_RXGLOCK() 1
184 #endif /* OSI_MACHDEP_H_ */