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)
78 #define VN_HOLD(V) osi_Assert(igrab((V)) == (V))
79 #define VN_RELE(V) iput((V))
81 #define afs_suser(x) capable(CAP_SYS_ADMIN)
82 #define wakeup afs_osi_Wakeup
85 #define vType(V) ((AFSTOV((V)))->i_mode & S_IFMT)
87 #define vSetType(V, type) AFSTOV((V))->i_mode = ((type) | (AFSTOV((V))->i_mode & ~S_IFMT)) /* preserve mode */
90 #define IsAfsVnode(V) ((V)->i_sb == afs_globalVFS) /* test superblock instead */
92 #define SetAfsVnode(V) /* unnecessary */
94 /* We often need to pretend we're in user space to get memory transfers
95 * right for the kernel calls we use.
97 #include <asm/uaccess.h>
99 #ifdef KERNEL_SPACE_DECL
100 #undef KERNEL_SPACE_DECL
102 #undef TO_KERNEL_SPACE
104 #define KERNEL_SPACE_DECL mm_segment_t _fs_space_decl
105 #define TO_USER_SPACE() { _fs_space_decl = get_fs(); set_fs(get_ds()); }
106 #define TO_KERNEL_SPACE() set_fs(_fs_space_decl)
108 #define copyin(F, T, C) (copy_from_user ((char*)(T), (char*)(F), (C)) > 0 ? EFAULT : 0)
109 static inline long copyinstr(char *from, char *to, int count, int *length) {
111 tmp = strncpy_from_user(to, from, count);
117 #define copyout(F, T, C) (copy_to_user ((char*)(T), (char*)(F), (C)) > 0 ? EFAULT : 0)
119 /* kernel print statements */
120 #define printf printk
121 #define uprintf printk
124 #define PAGESIZE PAGE_SIZE
126 #define NGROUPS NGROUPS_SMALL
130 typedef struct cred { /* maps to task field: */
132 uid_t cr_uid; /* euid */
133 uid_t cr_ruid; /* uid */
134 gid_t cr_gid; /* egid */
135 gid_t cr_rgid; /* gid */
136 #if defined(AFS_LINUX26_ENV)
137 struct group_info *cr_group_info;
139 gid_t cr_groups[NGROUPS]; /* 32 groups - empty set to NOGROUP */
142 struct cred *cr_next;
144 #define AFS_UCRED cred
145 #define AFS_PROC struct task_struct
146 #define crhold(c) (c)->cr_ref++
148 /* UIO manipulation */
149 typedef enum { AFS_UIOSYS, AFS_UIOUSER } uio_seg_t;
150 typedef enum { UIO_READ, UIO_WRITE } uio_flag_t;
152 struct iovec *uio_iov;
154 afs_offs_t uio_offset;
159 #define afsio_iov uio_iov
160 #define afsio_iovcnt uio_iovcnt
161 #define afsio_offset uio_offset
162 #define afsio_seg uio_segflg
163 #define afsio_fmode uio_fmode
164 #define afsio_resid uio_resid
166 /* Get/set the inode in the osifile struct. */
167 #define FILE_INODE(F) (F)->f_dentry->d_inode
169 #ifdef AFS_LINUX26_ENV
170 #define OSIFILE_INODE(a) FILE_INODE((a)->filp)
172 #define OSIFILE_INODE(a) FILE_INODE(&(a)->file)
175 #if defined(AFS_LINUX_64BIT_KERNEL) && !defined(AFS_ALPHA_LINUX20_ENV) && !defined(AFS_IA64_LINUX20_ENV)
179 /* page offset is obtained and stored here during module initialization
180 * We need a variable to do this because, the PAGE_OFFSET macro defined in
181 * include/asm/page.h can change from kernel to kernel and we cannot use
182 * the hardcoded version.
184 extern unsigned long afs_linux_page_offset;
186 /* function to help with the page offset stuff */
187 #define afs_linux_page_address(page) (afs_linux_page_offset + PAGE_SIZE * (page - mem_map))
189 #if defined(__KERNEL__)
190 #include <linux/version.h>
191 #include <linux/sched.h>
192 #include <linux/wait.h>
194 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
195 extern struct mutex afs_global_lock;
197 extern struct semaphore afs_global_lock;
198 #define mutex_lock(lock) down(lock)
199 #define mutex_unlock(lock) up(lock)
201 extern int afs_global_owner;
203 #define AFS_GLOCK() \
205 mutex_lock(&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 mutex_unlock(&afs_global_lock); \
223 #define AFS_GUNLOCK()
224 #define ISAFS_GLOCK() 1
225 #define AFS_ASSERT_GLOCK()
228 #endif /* OSI_MACHDEP_H_ */