[hcoop/debian/openafs.git] / src / afs / LINUX / osi_machdep.h

/*
 * Copyright 2000, International Business Machines Corporation and others.
 * All Rights Reserved.
 *
 * This software has been released under the terms of the IBM Public
 * License.  For details, see the LICENSE file in the top-level source
 * directory or online at http://www.openafs.org/dl/license10.html
 */

/*
 * Linux implementation.
 *
 */

#ifndef OSI_MACHDEP_H_
#define OSI_MACHDEP_H_

/* Only needed for xdr.h in glibc 2.1.x */
#ifndef quad_t
# define quad_t __quad_t
# define u_quad_t __u_quad_t
#endif

#undef getuerror

#ifdef STRUCT_TASK_STRUCT_HAS_TGID
# define getpid() current->tgid
# ifdef STRUCT_TASK_STRUCT_HAS_REAL_PARENT
#  define getppid() current->real_parent->tgid
# elif defined(STRUCT_TASK_STRUCT_HAS_PARENT)
#  define getppid() current->parent->tgid
# else
#  define getppid() current->p_opptr->tgid
# endif
#else /* !STRUCT_TASK_STRUCT_HAS_TGID */
# define getpid() current->pid
# ifdef STRUCT_TASK_STRUCT_HAS_REAL_PARENT
#  define getppid() current->real_parent->pid
# elif defined(STRUCT_TASK_STRUCT_HAS_PARENT)
#  define getppid() current->parent->pid
# else
#  define getppid() current->p_opptr->pid
# endif
#endif /* STRUCT_TASK_STRUCT_HAS_TGID */

#ifdef RECALC_SIGPENDING_TAKES_VOID
# define RECALC_SIGPENDING(X) recalc_sigpending()
#else
# define RECALC_SIGPENDING(X) recalc_sigpending(X)
#endif

#if defined (STRUCT_TASK_STRUCT_HAS_SIGMASK_LOCK)
# define SIG_LOCK(X) spin_lock_irq(&X->sigmask_lock)
# define SIG_UNLOCK(X) spin_unlock_irq(&X->sigmask_lock)
#elif defined (STRUCT_TASK_STRUCT_HAS_SIGHAND)
# define SIG_LOCK(X) spin_lock_irq(&X->sighand->siglock)
# define SIG_UNLOCK(X) spin_unlock_irq(&X->sighand->siglock)
#else
# define SIG_LOCK(X) spin_lock_irq(&X->sig->siglock)
# define SIG_UNLOCK(X) spin_unlock_irq(&X->sig->siglock)
#endif

#if defined (STRUCT_TASK_STRUCT_HAS_RLIM)
# define TASK_STRUCT_RLIM rlim
#elif defined (STRUCT_TASK_STRUCT_HAS_SIGNAL_RLIM)
# define TASK_STRUCT_RLIM signal->rlim
#else
# error Not sure what to do about rlim (should be in the Linux task struct somewhere....)
#endif


#define afs_hz HZ
#include "h/sched.h"
/* in case cred.h is present but not included in sched.h */
#if defined(HAVE_LINUX_CRED_H)
#include "h/cred.h"
#endif

#if defined(HAVE_LINUX_KTIME_GET_COARSE_REAL_TS64)
static inline time_t osi_Time(void) {
    struct timespec64 xtime;
    ktime_get_coarse_real_ts64(&xtime);
    return xtime.tv_sec;
}
#elif defined(HAVE_LINUX_CURRENT_KERNEL_TIME)
static inline time_t osi_Time(void) {
    struct timespec xtime;
    xtime = current_kernel_time();
    return xtime.tv_sec;
}
#else
# define osi_Time() (xtime.tv_sec)
#endif

#if defined(HAVE_LINUX_KTIME_GET_REAL_TS64)
# define osi_GetTime(V)                                      \
    do {                                                     \
	struct timespec64 __afs_tv;                          \
	ktime_get_real_ts64(&__afs_tv);                      \
	(V)->tv_sec = (afs_int32)__afs_tv.tv_sec;            \
	(V)->tv_usec = (afs_int32)__afs_tv.tv_nsec / 1000;   \
    } while(0)
#elif defined(AFS_LINUX_64BIT_KERNEL)
# define osi_GetTime(V)                                 \
    do {                                               \
       struct timeval __afs_tv;                              \
       do_gettimeofday(&__afs_tv);                           \
       (V)->tv_sec = (afs_int32)__afs_tv.tv_sec;             \
       (V)->tv_usec = (afs_int32)__afs_tv.tv_usec;           \
    } while (0)
#else
# define osi_GetTime(V) do_gettimeofday((V))
#endif

#undef gop_lookupname
#define gop_lookupname osi_lookupname

#undef gop_lookupname_user
#define gop_lookupname_user osi_lookupname

#define osi_vnhold(V, N) do { VN_HOLD(AFSTOV(V)); } while (0)
#define VN_HOLD(V) osi_Assert(igrab((V)) == (V))
#define VN_RELE(V) iput((V))

#define afs_suser(x) capable(CAP_SYS_ADMIN)
extern int afs_osi_Wakeup(void *event);
static inline void
wakeup(void *event)
{
    afs_osi_Wakeup(event);
}

#define vType(V) ((AFSTOV((V)))->i_mode & S_IFMT)
#define vSetType(V, type) AFSTOV((V))->i_mode = ((type) | (AFSTOV((V))->i_mode & ~S_IFMT))	/* preserve mode */
#define vSetVfsp(V, vfsp)				/* unused */
#define IsAfsVnode(V) ((V)->i_sb == afs_globalVFS)	/* test superblock instead */
#define SetAfsVnode(V)					/* unnecessary */

#if defined(HAVE_LINUX_UACCESS_H)
#include <linux/uaccess.h>
#else
#include <asm/uaccess.h>
#endif

#define copyin(F, T, C)  (copy_from_user ((char*)(T), (char*)(F), (C)) > 0 ? EFAULT : 0)
static inline long copyinstr(char *from, char *to, int count, int *length) {
    long tmp;
    tmp = strncpy_from_user(to, from, count);
    if (tmp < 0)
            return EFAULT;
    *length = tmp;
    return 0;
}
#define copyout(F, T, C) (copy_to_user ((char*)(T), (char*)(F), (C)) > 0 ? EFAULT : 0)

/* kernel print statements */
#define printf(args...) printk(args)
#define uprintf(args...) printk(args)


#ifndef NGROUPS
#define NGROUPS NGROUPS_SMALL
#endif

#ifdef STRUCT_GROUP_INFO_HAS_GID
/* compat macro for Linux 4.9 */
#define GROUP_AT(gi,x)  ((gi)->gid[x])
#endif

typedef struct task_struct afs_proc_t;

#ifdef HAVE_LINUX_KUID_T

#include <linux/uidgid.h>
typedef kuid_t afs_kuid_t;
typedef kgid_t afs_kgid_t;
extern struct user_namespace *afs_ns;
# ifdef CONFIG_USER_NS
#  define afs_current_user_ns() current_user_ns()
# else
/* Here current_user_ns() expands to GPL-only init_user_ns symbol! */
#  define afs_current_user_ns() ((struct user_namespace *)NULL)
# endif

static inline kuid_t afs_make_kuid(uid_t uid) {
    return make_kuid(afs_ns, uid);
}
static inline kgid_t afs_make_kgid(gid_t gid) {
    return make_kgid(afs_ns, gid);
}
static inline uid_t afs_from_kuid(kuid_t kuid) {
    return from_kuid(afs_ns, kuid);
}
static inline uid_t afs_from_kgid(kgid_t kgid) {
    return from_kgid(afs_ns, kgid);
}

#else

typedef uid_t afs_kuid_t;
typedef gid_t afs_kgid_t;

static inline afs_kuid_t afs_make_kuid(uid_t uid) {return uid;}
static inline afs_kgid_t afs_make_kgid(gid_t gid) {return gid;}
static inline uid_t afs_from_kuid(afs_kuid_t kuid) {return kuid;}
static inline gid_t afs_from_kgid(afs_kgid_t kgid) {return kgid;}
static inline unsigned char uid_eq(uid_t a, uid_t b) {return a == b;}
static inline unsigned char gid_eq(gid_t a, gid_t b) {return a == b;}
static inline unsigned char uid_lt(uid_t a, uid_t b) {return a < b;}
static inline unsigned char gid_lt(gid_t a, gid_t b) {return a < b;}
#define GLOBAL_ROOT_UID ((afs_kuid_t) 0)
#define GLOBAL_ROOT_GID ((afs_kgid_t) 0)

#endif

/* Credentials.  For newer kernels we use the kernel structure directly. */
#if defined(STRUCT_TASK_STRUCT_HAS_CRED)

typedef struct cred afs_ucred_t;
typedef struct cred cred_t;

# define afs_cr_uid(cred) (afs_from_kuid((cred)->fsuid))
# define afs_cr_gid(cred) (afs_from_kgid((cred)->fsgid))
# define afs_cr_ruid(cred) (afs_from_kuid((cred)->uid))
# define afs_cr_rgid(cred) (afs_from_kgid((cred)->gid))
# define afs_cr_group_info(cred) ((cred)->group_info)
# define crhold(c) (get_cred(c))
static inline void
afs_set_cr_uid(cred_t *cred, uid_t uid) {
    cred->fsuid = afs_make_kuid(uid);
}
static inline void
afs_set_cr_gid(cred_t *cred, gid_t gid) {
    cred->fsgid = afs_make_kgid(gid);
}
static inline void
afs_set_cr_ruid(cred_t *cred, uid_t uid) {
    cred->uid = afs_make_kuid(uid);
}
static inline void
afs_set_cr_rgid(cred_t *cred, gid_t gid) {
    cred->gid = afs_make_kgid(gid);
}
static inline void
afs_set_cr_group_info(cred_t *cred, struct group_info *group_info) {
    cred->group_info = group_info;
}

# define current_group_info() (current->cred->group_info)
# define task_gid(task) (task->cred->gid)
# define task_user(task) (task->cred->user)
# if defined(STRUCT_CRED_HAS_SESSION_KEYRING)
#  define task_session_keyring(task) (task->cred->session_keyring)
#  define current_session_keyring() (current->cred->session_keyring)
# else
#  define task_session_keyring(task) (task->cred->tgcred->session_keyring)
#  define current_session_keyring() (current->cred->tgcred->session_keyring)
# endif

#else

typedef struct afs_cred {
    atomic_t cr_ref;
    uid_t cr_uid;
    uid_t cr_ruid;
    gid_t cr_gid;
    gid_t cr_rgid;
    struct group_info *cr_group_info;
} cred_t;

typedef struct afs_cred afs_ucred_t;
# define afs_cr_group_info(cred) ((cred)->cr_group_info)
static inline void
afs_set_cr_group_info(cred_t *cred, struct group_info *group_info) {
    cred->cr_group_info = group_info;
}

# define current_group_info() (current->group_info)
# if !defined(task_gid)
#  define task_gid(task) (task->gid)
# endif
# if !defined(task_uid)
#  define task_uid(task) (task->uid)
# endif
# define task_user(task) (task->user)
# define task_session_keyring(task) (task->signal->session_keyring)
# define current_session_keyring() (current->signal->session_keyring)
# define crhold(c) atomic_inc(&(c)->cr_ref)

#endif /* defined(STRUCT_TASK_STRUCT_HAS_CRED) */

#if !defined(current_cred)
# define current_gid() (current->gid)
# define current_uid() (current->uid)
# define current_fsgid() (current->fsgid)
# define current_fsuid() (current->fsuid)
#endif

/* UIO manipulation */
typedef enum { AFS_UIOSYS, AFS_UIOUSER } uio_seg_t;
typedef enum { UIO_READ, UIO_WRITE } uio_flag_t;
struct uio {
    struct iovec *uio_iov;
    int uio_iovcnt;
    afs_offs_t uio_offset;
    uio_seg_t uio_seg;
    int uio_resid;
    uio_flag_t uio_flag;
};
#define	afsio_iov	uio_iov
#define	afsio_iovcnt	uio_iovcnt
#define	afsio_offset	uio_offset
#define	afsio_seg	uio_segflg
#define	afsio_fmode	uio_fmode
#define	afsio_resid	uio_resid

/* Get/set the inode in the osifile struct. */
#define FILE_INODE(F) (F)->f_dentry->d_inode

#define OSIFILE_INODE(a) FILE_INODE((a)->filp)

#if defined(AFS_LINUX_64BIT_KERNEL) && !defined(AFS_ALPHA_LINUX20_ENV) && !defined(AFS_IA64_LINUX20_ENV)
# define NEED_IOCTL32
#endif

#include <linux/version.h>
#include <linux/sched.h>
#include <linux/wait.h>

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
extern struct mutex afs_global_lock;
#else
extern struct semaphore afs_global_lock;
# define mutex_lock(lock) down(lock)
# define mutex_unlock(lock) up(lock)
#endif
extern int afs_global_owner;

#define AFS_GLOCK() \
do { \
	 mutex_lock(&afs_global_lock); \
	 if (afs_global_owner) \
	     osi_Panic("afs_global_lock already held by pid %d", \
		       afs_global_owner); \
	 afs_global_owner = current->pid; \
} while (0)

#define ISAFS_GLOCK() (afs_global_owner == current->pid)

#define AFS_GUNLOCK() \
do { \
    if (!ISAFS_GLOCK()) \
	osi_Panic("afs global lock not held at %s:%d", __FILE__, __LINE__); \
    afs_global_owner = 0; \
    mutex_unlock(&afs_global_lock); \
} while (0)

#define osi_InitGlock()

#ifdef AFS_AMD64_LINUX20_ENV
/* RHEL5 beta's kernel doesn't define these. They aren't gonna change, so... */

# ifndef __NR_ia32_afs_syscall
#  define __NR_ia32_afs_syscall 137
# endif
# ifndef __NR_ia32_setgroups
#  define __NR_ia32_setgroups 81
# endif
# ifndef __NR_ia32_setgroups32
#  define __NR_ia32_setgroups32 206
# endif
# ifndef __NR_ia32_close
#  define __NR_ia32_close 6
# endif
# ifndef __NR_ia32_chdir
#  define __NR_ia32_chdir 12
# endif
# ifndef __NR_ia32_break
#  define __NR_ia32_break 17
# endif
# ifndef __NR_ia32_stty
#  define __NR_ia32_stty 31
# endif
# ifndef __NR_ia32_gtty
#  define __NR_ia32_gtty 32
# endif
# ifndef __NR_ia32_ftime
#  define __NR_ia32_ftime 35
# endif
# ifndef __NR_ia32_prof
#  define __NR_ia32_prof 44
# endif
# ifndef __NR_ia32_lock
#  define __NR_ia32_lock 53
# endif
# ifndef __NR_ia32_mpx
#  define __NR_ia32_mpx 56
# endif
# ifndef __NR_ia32_exit
#  define __NR_ia32_exit 1
# endif
# ifndef __NR_ia32_mount
#  define __NR_ia32_mount 21
# endif
# ifndef __NR_ia32_read
#  define __NR_ia32_read 3
# endif
# ifndef __NR_ia32_write
#  define __NR_ia32_write 4
# endif
# ifndef __NR_ia32_open
#  define __NR_ia32_open 5
# endif
# ifndef __NR_ia32_close
#  define __NR_ia32_close 6
# endif
# ifndef __NR_ia32_unlink
#  define __NR_ia32_unlink 10
# endif
#endif

#define osi_procname(procname, size) strncpy(procname, current->comm, size)

#endif /* OSI_MACHDEP_H_ */
Commit	Line	Data
805e021f CE	1	/*
	2	* Copyright 2000, International Business Machines Corporation and others.
	3	* All Rights Reserved.
	4	*
	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
	8	*/
	9
	10	/*
	11	* Linux implementation.
	12	*
	13	*/
	14
	15	#ifndef OSI_MACHDEP_H_
	16	#define OSI_MACHDEP_H_
	17
	18	/* Only needed for xdr.h in glibc 2.1.x */
	19	#ifndef quad_t
	20	# define quad_t __quad_t
	21	# define u_quad_t __u_quad_t
	22	#endif
	23
	24	#undef getuerror
	25
	26	#ifdef STRUCT_TASK_STRUCT_HAS_TGID
	27	# define getpid() current->tgid
	28	# ifdef STRUCT_TASK_STRUCT_HAS_REAL_PARENT
	29	# define getppid() current->real_parent->tgid
	30	# elif defined(STRUCT_TASK_STRUCT_HAS_PARENT)
	31	# define getppid() current->parent->tgid
	32	# else
	33	# define getppid() current->p_opptr->tgid
	34	# endif
	35	#else /* !STRUCT_TASK_STRUCT_HAS_TGID */
	36	# define getpid() current->pid
	37	# ifdef STRUCT_TASK_STRUCT_HAS_REAL_PARENT
	38	# define getppid() current->real_parent->pid
	39	# elif defined(STRUCT_TASK_STRUCT_HAS_PARENT)
	40	# define getppid() current->parent->pid
	41	# else
	42	# define getppid() current->p_opptr->pid
	43	# endif
	44	#endif /* STRUCT_TASK_STRUCT_HAS_TGID */
	45
	46	#ifdef RECALC_SIGPENDING_TAKES_VOID
	47	# define RECALC_SIGPENDING(X) recalc_sigpending()
	48	#else
	49	# define RECALC_SIGPENDING(X) recalc_sigpending(X)
	50	#endif
	51
	52	#if defined (STRUCT_TASK_STRUCT_HAS_SIGMASK_LOCK)
	53	# define SIG_LOCK(X) spin_lock_irq(&X->sigmask_lock)
	54	# define SIG_UNLOCK(X) spin_unlock_irq(&X->sigmask_lock)
	55	#elif defined (STRUCT_TASK_STRUCT_HAS_SIGHAND)
	56	# define SIG_LOCK(X) spin_lock_irq(&X->sighand->siglock)
	57	# define SIG_UNLOCK(X) spin_unlock_irq(&X->sighand->siglock)
	58	#else
	59	# define SIG_LOCK(X) spin_lock_irq(&X->sig->siglock)
	60	# define SIG_UNLOCK(X) spin_unlock_irq(&X->sig->siglock)
	61	#endif
	62
	63	#if defined (STRUCT_TASK_STRUCT_HAS_RLIM)
	64	# define TASK_STRUCT_RLIM rlim
65	#elif defined (STRUCT_TASK_STRUCT_HAS_SIGNAL_RLIM)
66	# define TASK_STRUCT_RLIM signal->rlim
67	#else
68	# error Not sure what to do about rlim (should be in the Linux task struct somewhere....)
69	#endif
70
71
72	#define afs_hz HZ
73	#include "h/sched.h"
74	/* in case cred.h is present but not included in sched.h */
75	#if defined(HAVE_LINUX_CRED_H)
76	#include "h/cred.h"
77	#endif
78
79	#if defined(HAVE_LINUX_KTIME_GET_COARSE_REAL_TS64)
80	static inline time_t osi_Time(void) {
81	struct timespec64 xtime;
82	ktime_get_coarse_real_ts64(&xtime);
83	return xtime.tv_sec;
84	}
85	#elif defined(HAVE_LINUX_CURRENT_KERNEL_TIME)
86	static inline time_t osi_Time(void) {
87	struct timespec xtime;
88	xtime = current_kernel_time();
89	return xtime.tv_sec;
90	}
91	#else
92	# define osi_Time() (xtime.tv_sec)
93	#endif
94
95	#if defined(HAVE_LINUX_KTIME_GET_REAL_TS64)
96	# define osi_GetTime(V) \
97	do { \
98	struct timespec64 __afs_tv; \
99	ktime_get_real_ts64(&__afs_tv); \
100	(V)->tv_sec = (afs_int32)__afs_tv.tv_sec; \
101	(V)->tv_usec = (afs_int32)__afs_tv.tv_nsec / 1000; \
102	} while(0)
103	#elif defined(AFS_LINUX_64BIT_KERNEL)
104	# define osi_GetTime(V) \
105	do { \
106	struct timeval __afs_tv; \
107	do_gettimeofday(&__afs_tv); \
108	(V)->tv_sec = (afs_int32)__afs_tv.tv_sec; \
109	(V)->tv_usec = (afs_int32)__afs_tv.tv_usec; \
110	} while (0)
111	#else
112	# define osi_GetTime(V) do_gettimeofday((V))
113	#endif
114
115	#undef gop_lookupname
116	#define gop_lookupname osi_lookupname
117
118	#undef gop_lookupname_user
119	#define gop_lookupname_user osi_lookupname
120
121	#define osi_vnhold(V, N) do { VN_HOLD(AFSTOV(V)); } while (0)
122	#define VN_HOLD(V) osi_Assert(igrab((V)) == (V))
123	#define VN_RELE(V) iput((V))
124
125	#define afs_suser(x) capable(CAP_SYS_ADMIN)
126	extern int afs_osi_Wakeup(void *event);
127	static inline void
128	wakeup(void *event)
129	{
130	afs_osi_Wakeup(event);
131	}
132
133	#define vType(V) ((AFSTOV((V)))->i_mode & S_IFMT)
134	#define vSetType(V, type) AFSTOV((V))->i_mode = ((type) \| (AFSTOV((V))->i_mode & ~S_IFMT)) /* preserve mode */
135	#define vSetVfsp(V, vfsp) /* unused */
136	#define IsAfsVnode(V) ((V)->i_sb == afs_globalVFS) /* test superblock instead */
137	#define SetAfsVnode(V) /* unnecessary */
138
139	#if defined(HAVE_LINUX_UACCESS_H)
140	#include <linux/uaccess.h>
141	#else
142	#include <asm/uaccess.h>
143	#endif
144
145	#define copyin(F, T, C) (copy_from_user ((char)(T), (char)(F), (C)) > 0 ? EFAULT : 0)
146	static inline long copyinstr(char from, char to, int count, int *length) {
147	long tmp;
148	tmp = strncpy_from_user(to, from, count);
149	if (tmp < 0)
150	return EFAULT;
151	*length = tmp;
152	return 0;
153	}
154	#define copyout(F, T, C) (copy_to_user ((char)(T), (char)(F), (C)) > 0 ? EFAULT : 0)
155
156	/* kernel print statements */
157	#define printf(args...) printk(args)
158	#define uprintf(args...) printk(args)
159
160
161	#ifndef NGROUPS
162	#define NGROUPS NGROUPS_SMALL
163	#endif
164
165	#ifdef STRUCT_GROUP_INFO_HAS_GID
166	/* compat macro for Linux 4.9 */
167	#define GROUP_AT(gi,x) ((gi)->gid[x])
168	#endif
169
170	typedef struct task_struct afs_proc_t;
171
172	#ifdef HAVE_LINUX_KUID_T
173
174	#include <linux/uidgid.h>
175	typedef kuid_t afs_kuid_t;
176	typedef kgid_t afs_kgid_t;
177	extern struct user_namespace *afs_ns;
178	# ifdef CONFIG_USER_NS
179	# define afs_current_user_ns() current_user_ns()
180	# else
181	/* Here current_user_ns() expands to GPL-only init_user_ns symbol! */
182	# define afs_current_user_ns() ((struct user_namespace *)NULL)
183	# endif
184
185	static inline kuid_t afs_make_kuid(uid_t uid) {
186	return make_kuid(afs_ns, uid);
187	}
188	static inline kgid_t afs_make_kgid(gid_t gid) {
189	return make_kgid(afs_ns, gid);
190	}
191	static inline uid_t afs_from_kuid(kuid_t kuid) {
192	return from_kuid(afs_ns, kuid);
193	}
194	static inline uid_t afs_from_kgid(kgid_t kgid) {
195	return from_kgid(afs_ns, kgid);
196	}
197
198	#else
199
200	typedef uid_t afs_kuid_t;
201	typedef gid_t afs_kgid_t;
202
203	static inline afs_kuid_t afs_make_kuid(uid_t uid) {return uid;}
204	static inline afs_kgid_t afs_make_kgid(gid_t gid) {return gid;}
205	static inline uid_t afs_from_kuid(afs_kuid_t kuid) {return kuid;}
206	static inline gid_t afs_from_kgid(afs_kgid_t kgid) {return kgid;}
207	static inline unsigned char uid_eq(uid_t a, uid_t b) {return a == b;}
208	static inline unsigned char gid_eq(gid_t a, gid_t b) {return a == b;}
209	static inline unsigned char uid_lt(uid_t a, uid_t b) {return a < b;}
210	static inline unsigned char gid_lt(gid_t a, gid_t b) {return a < b;}
211	#define GLOBAL_ROOT_UID ((afs_kuid_t) 0)
212	#define GLOBAL_ROOT_GID ((afs_kgid_t) 0)
213
214	#endif
215
216	/* Credentials. For newer kernels we use the kernel structure directly. */
217	#if defined(STRUCT_TASK_STRUCT_HAS_CRED)
218
219	typedef struct cred afs_ucred_t;
220	typedef struct cred cred_t;
221
222	# define afs_cr_uid(cred) (afs_from_kuid((cred)->fsuid))
223	# define afs_cr_gid(cred) (afs_from_kgid((cred)->fsgid))
224	# define afs_cr_ruid(cred) (afs_from_kuid((cred)->uid))
225	# define afs_cr_rgid(cred) (afs_from_kgid((cred)->gid))
226	# define afs_cr_group_info(cred) ((cred)->group_info)
227	# define crhold(c) (get_cred(c))
228	static inline void
229	afs_set_cr_uid(cred_t *cred, uid_t uid) {
230	cred->fsuid = afs_make_kuid(uid);
231	}
232	static inline void
233	afs_set_cr_gid(cred_t *cred, gid_t gid) {
234	cred->fsgid = afs_make_kgid(gid);
235	}
236	static inline void
237	afs_set_cr_ruid(cred_t *cred, uid_t uid) {
238	cred->uid = afs_make_kuid(uid);
239	}
240	static inline void
241	afs_set_cr_rgid(cred_t *cred, gid_t gid) {
242	cred->gid = afs_make_kgid(gid);
243	}
244	static inline void
245	afs_set_cr_group_info(cred_t cred, struct group_info group_info) {
246	cred->group_info = group_info;
247	}
248
249	# define current_group_info() (current->cred->group_info)
250	# define task_gid(task) (task->cred->gid)
251	# define task_user(task) (task->cred->user)
252	# if defined(STRUCT_CRED_HAS_SESSION_KEYRING)
253	# define task_session_keyring(task) (task->cred->session_keyring)
254	# define current_session_keyring() (current->cred->session_keyring)
255	# else
256	# define task_session_keyring(task) (task->cred->tgcred->session_keyring)
257	# define current_session_keyring() (current->cred->tgcred->session_keyring)
258	# endif
259
260	#else
261
262	typedef struct afs_cred {
263	atomic_t cr_ref;
264	uid_t cr_uid;
265	uid_t cr_ruid;
266	gid_t cr_gid;
267	gid_t cr_rgid;
268	struct group_info *cr_group_info;
269	} cred_t;
270
271	typedef struct afs_cred afs_ucred_t;
272	# define afs_cr_group_info(cred) ((cred)->cr_group_info)
273	static inline void
274	afs_set_cr_group_info(cred_t cred, struct group_info group_info) {
275	cred->cr_group_info = group_info;
276	}
277
278	# define current_group_info() (current->group_info)
279	# if !defined(task_gid)
280	# define task_gid(task) (task->gid)
281	# endif
282	# if !defined(task_uid)
283	# define task_uid(task) (task->uid)
284	# endif
285	# define task_user(task) (task->user)
286	# define task_session_keyring(task) (task->signal->session_keyring)
287	# define current_session_keyring() (current->signal->session_keyring)
288	# define crhold(c) atomic_inc(&(c)->cr_ref)
289
290	#endif /* defined(STRUCT_TASK_STRUCT_HAS_CRED) */
291
292	#if !defined(current_cred)
293	# define current_gid() (current->gid)
294	# define current_uid() (current->uid)
295	# define current_fsgid() (current->fsgid)
296	# define current_fsuid() (current->fsuid)
297	#endif
298
299	/* UIO manipulation */
300	typedef enum { AFS_UIOSYS, AFS_UIOUSER } uio_seg_t;
301	typedef enum { UIO_READ, UIO_WRITE } uio_flag_t;
302	struct uio {
303	struct iovec *uio_iov;
304	int uio_iovcnt;
305	afs_offs_t uio_offset;
306	uio_seg_t uio_seg;
307	int uio_resid;
308	uio_flag_t uio_flag;
309	};
310	#define afsio_iov uio_iov
311	#define afsio_iovcnt uio_iovcnt
312	#define afsio_offset uio_offset
313	#define afsio_seg uio_segflg
314	#define afsio_fmode uio_fmode
315	#define afsio_resid uio_resid
316
317	/* Get/set the inode in the osifile struct. */
318	#define FILE_INODE(F) (F)->f_dentry->d_inode
319
320	#define OSIFILE_INODE(a) FILE_INODE((a)->filp)
321
322	#if defined(AFS_LINUX_64BIT_KERNEL) && !defined(AFS_ALPHA_LINUX20_ENV) && !defined(AFS_IA64_LINUX20_ENV)
323	# define NEED_IOCTL32
324	#endif
325
326	#include <linux/version.h>
327	#include <linux/sched.h>
328	#include <linux/wait.h>
329
330	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
331	extern struct mutex afs_global_lock;
332	#else
333	extern struct semaphore afs_global_lock;
334	# define mutex_lock(lock) down(lock)
335	# define mutex_unlock(lock) up(lock)
336	#endif
337	extern int afs_global_owner;
338
339	#define AFS_GLOCK() \
340	do { \
341	mutex_lock(&afs_global_lock); \
342	if (afs_global_owner) \
343	osi_Panic("afs_global_lock already held by pid %d", \
344	afs_global_owner); \
345	afs_global_owner = current->pid; \
346	} while (0)
347
348	#define ISAFS_GLOCK() (afs_global_owner == current->pid)
349
350	#define AFS_GUNLOCK() \
351	do { \
352	if (!ISAFS_GLOCK()) \
353	osi_Panic("afs global lock not held at %s:%d", __FILE__, __LINE__); \
354	afs_global_owner = 0; \
355	mutex_unlock(&afs_global_lock); \
356	} while (0)
357
358	#define osi_InitGlock()
359
360	#ifdef AFS_AMD64_LINUX20_ENV
361	/* RHEL5 beta's kernel doesn't define these. They aren't gonna change, so... */
362
363	# ifndef __NR_ia32_afs_syscall
364	# define __NR_ia32_afs_syscall 137
365	# endif
366	# ifndef __NR_ia32_setgroups
367	# define __NR_ia32_setgroups 81
368	# endif
369	# ifndef __NR_ia32_setgroups32
370	# define __NR_ia32_setgroups32 206
371	# endif
372	# ifndef __NR_ia32_close
373	# define __NR_ia32_close 6
374	# endif
375	# ifndef __NR_ia32_chdir
376	# define __NR_ia32_chdir 12
377	# endif
378	# ifndef __NR_ia32_break
379	# define __NR_ia32_break 17
380	# endif
381	# ifndef __NR_ia32_stty
382	# define __NR_ia32_stty 31
383	# endif
384	# ifndef __NR_ia32_gtty
385	# define __NR_ia32_gtty 32
386	# endif
387	# ifndef __NR_ia32_ftime
388	# define __NR_ia32_ftime 35
389	# endif
390	# ifndef __NR_ia32_prof
391	# define __NR_ia32_prof 44
392	# endif
393	# ifndef __NR_ia32_lock
394	# define __NR_ia32_lock 53
395	# endif
396	# ifndef __NR_ia32_mpx
397	# define __NR_ia32_mpx 56
398	# endif
399	# ifndef __NR_ia32_exit
400	# define __NR_ia32_exit 1
401	# endif
402	# ifndef __NR_ia32_mount
403	# define __NR_ia32_mount 21
404	# endif
405	# ifndef __NR_ia32_read
406	# define __NR_ia32_read 3
407	# endif
408	# ifndef __NR_ia32_write
409	# define __NR_ia32_write 4
410	# endif
411	# ifndef __NR_ia32_open
412	# define __NR_ia32_open 5
413	# endif
414	# ifndef __NR_ia32_close
415	# define __NR_ia32_close 6
416	# endif
417	# ifndef __NR_ia32_unlink
418	# define __NR_ia32_unlink 10
419	# endif
420	#endif
421
422	#define osi_procname(procname, size) strncpy(procname, current->comm, size)
423
424	#endif /* OSI_MACHDEP_H_ */