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14 * in the LICENSE file that accompanied this code).
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27 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
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37 #ifndef __LIBCFS_LIBCFS_H__
38 #define __LIBCFS_LIBCFS_H__
41 # include <libcfs/linux/libcfs.h>
44 #define LIBCFS_VERSION "0.5.0"
46 static inline int __is_po2(unsigned long long val)
48 return !(val & (val - 1));
51 #define IS_PO2(val) __is_po2((unsigned long long)(val))
52 #define PO2_ROUNDUP_TYPED(x, po2, type) (-(-(type)(x) & -(type)(po2)))
53 #define LOWEST_BIT_SET(x) ((x) & ~((x) - 1))
55 /* Sparse annotations */
56 #if !defined(__must_hold)
58 # define __must_hold(x) __attribute__((context(x, 1, 1)))
59 # else /* __CHECKER__ */
60 # define __must_hold(x)
61 # endif /* !__CHECKER__ */
62 #endif /* !__must_hold */
64 /* libcfs watchdogs */
67 /* Add a watchdog which fires after "time" milliseconds of delay. You have to
68 * touch it once to enable it. */
69 struct lc_watchdog *lc_watchdog_add(int time,
70 void (*cb)(pid_t pid, void *),
73 /* Enables a watchdog and resets its timer. */
74 void lc_watchdog_touch(struct lc_watchdog *lcw, int timeout);
75 #define CFS_GET_TIMEOUT(svc) (max_t(int, obd_timeout, \
76 AT_OFF ? 0 : at_get(&svc->srv_at_estimate)) * \
77 svc->srv_watchdog_factor)
79 /* Disable a watchdog; touch it to restart it. */
80 void lc_watchdog_disable(struct lc_watchdog *lcw);
82 /* Clean up the watchdog */
83 void lc_watchdog_delete(struct lc_watchdog *lcw);
85 /* need both kernel and user-land acceptor */
86 #define LNET_ACCEPTOR_MIN_RESERVED_PORT 512
87 #define LNET_ACCEPTOR_MAX_RESERVED_PORT 1023
90 * Drop into debugger, if possible. Implementation is provided by platform.
93 void cfs_enter_debugger(void);
98 int unshare_fs_struct(void);
99 sigset_t cfs_block_allsigs(void);
100 sigset_t cfs_block_sigs(unsigned long sigs);
101 sigset_t cfs_block_sigsinv(unsigned long sigs);
102 void cfs_restore_sigs(sigset_t);
103 void cfs_clear_sigpending(void);
106 * Random number handling
109 /* returns a random 32-bit integer */
110 unsigned int cfs_rand(void);
111 /* seed the generator */
112 void cfs_srand(unsigned int, unsigned int);
113 void cfs_get_random_bytes(void *buf, int size);
114 #endif /* __KERNEL__ */
116 #include <libcfs/libcfs_debug.h>
117 #include <libcfs/libcfs_private.h>
119 # include <libcfs/bitmap.h>
120 # include <libcfs/libcfs_cpu.h>
121 # include <libcfs/libcfs_ioctl.h>
122 # include <libcfs/libcfs_prim.h>
123 # include <libcfs/libcfs_time.h>
124 # include <libcfs/libcfs_string.h>
125 # include <libcfs/libcfs_workitem.h>
126 # include <libcfs/libcfs_hash.h>
127 # include <libcfs/libcfs_heap.h>
128 # include <libcfs/libcfs_fail.h>
130 int libcfs_ioctl_data_adjust(struct libcfs_ioctl_data *data);
131 int libcfs_ioctl(unsigned long cmd, void __user *uparam);
133 /* container_of depends on "likely" which is defined in libcfs_private.h */
134 static inline void *__container_of(const void *ptr, unsigned long shift)
136 if (unlikely(IS_ERR(ptr) || ptr == NULL))
137 return ERR_CAST(ptr);
139 return (char *)ptr - shift;
142 #define container_of0(ptr, type, member) \
143 ((type *)__container_of((ptr), offsetof(type, member)))
145 #endif /* __KERNEL__ */
147 #endif /* _LIBCFS_LIBCFS_H_ */