4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
33 #ifndef __LIBCFS_LIBCFS_H__
34 #define __LIBCFS_LIBCFS_H__
36 #include <linux/kernel.h>
37 #include <linux/module.h>
39 #include <libcfs/linux/linux-misc.h>
40 #include <libcfs/linux/linux-time.h>
41 #include <libcfs/linux/linux-wait.h>
43 #include <uapi/linux/lnet/libcfs_ioctl.h>
44 #include <libcfs/libcfs_debug.h>
45 #include <libcfs/libcfs_private.h>
46 #include <libcfs/bitmap.h>
47 #include <libcfs/libcfs_cpu.h>
48 #include <libcfs/libcfs_prim.h>
49 #include <libcfs/libcfs_string.h>
50 #include <libcfs/libcfs_workitem.h>
51 #include <libcfs/libcfs_hash.h>
52 #include <libcfs/libcfs_heap.h>
53 #include <libcfs/libcfs_fail.h>
56 #define LIBCFS_VERSION "0.7.1"
58 #define PO2_ROUNDUP_TYPED(x, po2, type) (-(-(type)(x) & -(type)(po2)))
59 #define LOWEST_BIT_SET(x) ((x) & ~((x) - 1))
61 /* Sparse annotations */
62 #if !defined(__must_hold)
64 # define __must_hold(x) __attribute__((context(x, 1, 1)))
65 # else /* __CHECKER__ */
66 # define __must_hold(x)
67 # endif /* !__CHECKER__ */
68 #endif /* !__must_hold */
70 /* libcfs watchdogs */
73 /* Add a watchdog which fires after "time" milliseconds of delay. You have to
74 * touch it once to enable it. */
75 struct lc_watchdog *lc_watchdog_add(int time,
76 void (*cb)(pid_t pid, void *),
79 /* Enables a watchdog and resets its timer. */
80 void lc_watchdog_touch(struct lc_watchdog *lcw, int timeout);
81 #define CFS_GET_TIMEOUT(svc) (max_t(int, obd_timeout, \
82 AT_OFF ? 0 : at_get(&svc->srv_at_estimate)) * \
83 svc->srv_watchdog_factor)
85 /* Disable a watchdog; touch it to restart it. */
86 void lc_watchdog_disable(struct lc_watchdog *lcw);
88 /* Clean up the watchdog */
89 void lc_watchdog_delete(struct lc_watchdog *lcw);
91 /* need both kernel and user-land acceptor */
92 #define LNET_ACCEPTOR_MIN_RESERVED_PORT 512
93 #define LNET_ACCEPTOR_MAX_RESERVED_PORT 1023
95 extern struct blocking_notifier_head libcfs_ioctl_list;
96 static inline int notifier_from_ioctl_errno(int err)
100 return notifier_from_errno(err) | NOTIFY_STOP_MASK;
104 * Defined by platform
106 int unshare_fs_struct(void);
107 sigset_t cfs_block_allsigs(void);
108 sigset_t cfs_block_sigs(unsigned long sigs);
109 sigset_t cfs_block_sigsinv(unsigned long sigs);
110 void cfs_restore_sigs(sigset_t);
111 void cfs_clear_sigpending(void);
114 * Random number handling
117 /* returns a random 32-bit integer */
118 unsigned int cfs_rand(void);
119 /* seed the generator */
120 void cfs_srand(unsigned int, unsigned int);
121 void cfs_get_random_bytes(void *buf, int size);
123 int libcfs_ioctl_data_adjust(struct libcfs_ioctl_data *data);
124 int libcfs_ioctl(unsigned long cmd, void __user *uparam);
126 /* container_of depends on "likely" which is defined in libcfs_private.h */
127 static inline void *__container_of(const void *ptr, unsigned long shift)
129 if (unlikely(IS_ERR(ptr) || ptr == NULL))
130 return ERR_CAST(ptr);
132 return (char *)ptr - shift;
135 #define container_of0(ptr, type, member) \
136 ((type *)__container_of((ptr), offsetof(type, member)))
138 struct lnet_debugfs_symlink_def {
143 void lnet_insert_debugfs(struct ctl_table *table);
144 void lnet_remove_debugfs(struct ctl_table *table);
146 /* helper for sysctl handlers */
147 int lprocfs_call_handler(void *data, int write, loff_t *ppos,
148 void __user *buffer, size_t *lenp,
149 int (*handler)(void *data, int write, loff_t pos,
150 void __user *buffer, int len));
152 #endif /* _LIBCFS_LIBCFS_H_ */