*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2011, Whamcloud, Inc.
+ * Copyright (c) 2011, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#ifndef __LIBCFS_LIBCFS_H__
#define __LIBCFS_LIBCFS_H__
-#if !__GNUC__
-#define __attribute__(x)
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/workqueue.h>
+#include <linux/sched.h>
+#ifdef HAVE_SCHED_HEADERS
+#include <linux/sched/signal.h>
#endif
-#if !defined(__WINNT__) && !defined(__KERNEL__)
-#include <libcfs/posix/libcfs.h>
-#elif defined(__linux__)
-#include <libcfs/linux/libcfs.h>
-#elif defined(__APPLE__)
-#include <libcfs/darwin/libcfs.h>
-#elif defined(__WINNT__)
-#include <libcfs/winnt/libcfs.h>
-#else
-#error Unsupported operating system.
-#endif
+#include <libcfs/linux/linux-misc.h>
+#include <libcfs/linux/linux-mem.h>
+#include <libcfs/linux/linux-time.h>
+#include <libcfs/linux/linux-wait.h>
+#include <uapi/linux/lnet/libcfs_ioctl.h>
+#include <libcfs/libcfs_debug.h>
+#include <libcfs/libcfs_private.h>
+#include <libcfs/bitmap.h>
+#include <libcfs/libcfs_cpu.h>
+#include <libcfs/libcfs_string.h>
+#include <libcfs/libcfs_workitem.h>
+#include <libcfs/libcfs_hash.h>
+#include <libcfs/libcfs_fail.h>
#include "curproc.h"
-#ifndef offsetof
-# define offsetof(typ,memb) ((long)(long_ptr_t)((char *)&(((typ *)0)->memb)))
-#endif
-
-#ifndef ARRAY_SIZE
-#define ARRAY_SIZE(a) ((sizeof (a)) / (sizeof ((a)[0])))
-#endif
-
-#if !defined(container_of)
-/* given a pointer @ptr to the field @member embedded into type (usually
- * struct) @type, return pointer to the embedding instance of @type. */
-#define container_of(ptr, type, member) \
- ((type *)((char *)(ptr)-(char *)(&((type *)0)->member)))
-#endif
-
-static inline int __is_po2(unsigned long long val)
-{
- return !(val & (val - 1));
-}
+#define LIBCFS_VERSION "0.7.1"
-#define IS_PO2(val) __is_po2((unsigned long long)(val))
+/* Sparse annotations */
+#if !defined(__must_hold)
+# ifdef __CHECKER__
+# define __must_hold(x) __attribute__((context(x, 1, 1)))
+# else /* __CHECKER__ */
+# define __must_hold(x)
+# endif /* !__CHECKER__ */
+#endif /* !__must_hold */
-#define LOWEST_BIT_SET(x) ((x) & ~((x) - 1))
-
-/*
- * Lustre Error Checksum: calculates checksum
- * of Hex number by XORing each bit.
- */
-#define LERRCHKSUM(hexnum) (((hexnum) & 0xf) ^ ((hexnum) >> 4 & 0xf) ^ \
- ((hexnum) >> 8 & 0xf))
-
-
-/*
- * Some (nomina odiosa sunt) platforms define NULL as naked 0. This confuses
- * Lustre RETURN(NULL) macro.
- */
-#if defined(NULL)
-#undef NULL
-#endif
-
-#define NULL ((void *)0)
-
-#define LUSTRE_SRV_LNET_PID LUSTRE_LNET_PID
-
-#ifdef __KERNEL__
-
-#include <libcfs/list.h>
-
-#ifndef cfs_for_each_possible_cpu
-# error cfs_for_each_possible_cpu is not supported by kernel!
-#endif
-
-/* libcfs tcpip */
-int libcfs_ipif_query(char *name, int *up, __u32 *ip, __u32 *mask);
-int libcfs_ipif_enumerate(char ***names);
-void libcfs_ipif_free_enumeration(char **names, int n);
-int libcfs_sock_listen(cfs_socket_t **sockp, __u32 ip, int port, int backlog);
-int libcfs_sock_accept(cfs_socket_t **newsockp, cfs_socket_t *sock);
-void libcfs_sock_abort_accept(cfs_socket_t *sock);
-int libcfs_sock_connect(cfs_socket_t **sockp, int *fatal,
- __u32 local_ip, int local_port,
- __u32 peer_ip, int peer_port);
-int libcfs_sock_setbuf(cfs_socket_t *socket, int txbufsize, int rxbufsize);
-int libcfs_sock_getbuf(cfs_socket_t *socket, int *txbufsize, int *rxbufsize);
-int libcfs_sock_getaddr(cfs_socket_t *socket, int remote, __u32 *ip, int *port);
-int libcfs_sock_write(cfs_socket_t *sock, void *buffer, int nob, int timeout);
-int libcfs_sock_read(cfs_socket_t *sock, void *buffer, int nob, int timeout);
-void libcfs_sock_release(cfs_socket_t *sock);
-
-/* libcfs watchdogs */
-struct lc_watchdog;
-
-/* Add a watchdog which fires after "time" milliseconds of delay. You have to
- * touch it once to enable it. */
-struct lc_watchdog *lc_watchdog_add(int time,
- void (*cb)(pid_t pid, void *),
- void *data);
-
-/* Enables a watchdog and resets its timer. */
-void lc_watchdog_touch(struct lc_watchdog *lcw, int timeout);
-#define CFS_GET_TIMEOUT(svc) (max_t(int, obd_timeout, \
- AT_OFF ? 0 : at_get(&svc->srv_at_estimate)) * \
- svc->srv_watchdog_factor)
-
-/* Disable a watchdog; touch it to restart it. */
-void lc_watchdog_disable(struct lc_watchdog *lcw);
-
-/* Clean up the watchdog */
-void lc_watchdog_delete(struct lc_watchdog *lcw);
-
-/* Dump a debug log */
-void lc_watchdog_dumplog(pid_t pid, void *data);
-
-#endif /* __KERNEL__ */
+typedef s32 timeout_t;
/* need both kernel and user-land acceptor */
#define LNET_ACCEPTOR_MIN_RESERVED_PORT 512
#define LNET_ACCEPTOR_MAX_RESERVED_PORT 1023
-/*
- * libcfs pseudo device operations
- *
- * struct cfs_psdev_t and
- * cfs_psdev_register() and
- * cfs_psdev_deregister() are declared in
- * libcfs/<os>/<os>-prim.h
- *
- * It's just draft now.
- */
-
-struct cfs_psdev_file {
- unsigned long off;
- void *private_data;
- unsigned long reserved1;
- unsigned long reserved2;
-};
+extern struct blocking_notifier_head libcfs_ioctl_list;
+static inline int notifier_from_ioctl_errno(int err)
+{
+ if (err == -EINVAL)
+ return NOTIFY_OK;
+ return notifier_from_errno(err) | NOTIFY_STOP_MASK;
+}
-struct cfs_psdev_ops {
- int (*p_open)(unsigned long, void *);
- int (*p_close)(unsigned long, void *);
- int (*p_read)(struct cfs_psdev_file *, char *, unsigned long);
- int (*p_write)(struct cfs_psdev_file *, char *, unsigned long);
- int (*p_ioctl)(struct cfs_psdev_file *, unsigned long, void *);
-};
+int libcfs_ioctl_data_adjust(struct libcfs_ioctl_data *data);
-/*
- * Universal memory allocator API
- */
-enum cfs_alloc_flags {
- /* allocation is not allowed to block */
- CFS_ALLOC_ATOMIC = 0x1,
- /* allocation is allowed to block */
- CFS_ALLOC_WAIT = 0x2,
- /* allocation should return zeroed memory */
- CFS_ALLOC_ZERO = 0x4,
- /* allocation is allowed to call file-system code to free/clean
- * memory */
- CFS_ALLOC_FS = 0x8,
- /* allocation is allowed to do io to free/clean memory */
- CFS_ALLOC_IO = 0x10,
- /* don't report allocation failure to the console */
- CFS_ALLOC_NOWARN = 0x20,
- /* standard allocator flag combination */
- CFS_ALLOC_STD = CFS_ALLOC_FS | CFS_ALLOC_IO,
- CFS_ALLOC_USER = CFS_ALLOC_WAIT | CFS_ALLOC_FS | CFS_ALLOC_IO,
-};
+extern struct workqueue_struct *cfs_rehash_wq;
-/* flags for cfs_page_alloc() in addition to enum cfs_alloc_flags */
-enum cfs_alloc_page_flags {
- /* allow to return page beyond KVM. It has to be mapped into KVM by
- * cfs_kmap() and unmapped with cfs_kunmap(). */
- CFS_ALLOC_HIGHMEM = 0x40,
- CFS_ALLOC_HIGHUSER = CFS_ALLOC_WAIT | CFS_ALLOC_FS | CFS_ALLOC_IO |
- CFS_ALLOC_HIGHMEM,
+struct lnet_debugfs_symlink_def {
+ const char *name;
+ const char *target;
};
-/*
- * Drop into debugger, if possible. Implementation is provided by platform.
- */
-
-void cfs_enter_debugger(void);
-
-/*
- * Defined by platform
- */
-void cfs_daemonize(char *str);
-int cfs_daemonize_ctxt(char *str);
-cfs_sigset_t cfs_get_blocked_sigs(void);
-cfs_sigset_t cfs_block_allsigs(void);
-cfs_sigset_t cfs_block_sigs(unsigned long sigs);
-cfs_sigset_t cfs_block_sigsinv(unsigned long sigs);
-void cfs_restore_sigs(cfs_sigset_t);
-int cfs_signal_pending(void);
-void cfs_clear_sigpending(void);
-
-/*
- * XXX Liang:
- * these macros should be removed in the future,
- * we keep them just for keeping libcfs compatible
- * with other branches.
- */
-#define libcfs_daemonize(s) cfs_daemonize(s)
-#define cfs_sigmask_lock(f) do { f= 0; } while (0)
-#define cfs_sigmask_unlock(f) do { f= 0; } while (0)
-
-int convert_server_error(__u64 ecode);
-int convert_client_oflag(int cflag, int *result);
-
-/*
- * Stack-tracing filling.
- */
+void lnet_insert_debugfs(struct ctl_table *table);
+void lnet_remove_debugfs(struct ctl_table *table);
-/*
- * Platform-dependent data-type to hold stack frames.
- */
-struct cfs_stack_trace;
-
-/*
- * Fill @trace with current back-trace.
- */
-void cfs_stack_trace_fill(struct cfs_stack_trace *trace);
+/* helper for sysctl handlers */
+int lprocfs_call_handler(void *data, int write, loff_t *ppos,
+ void __user *buffer, size_t *lenp,
+ int (*handler)(void *data, int write, loff_t pos,
+ void __user *buffer, int len));
/*
- * Return instruction pointer for frame @frame_no. NULL if @frame_no is
- * invalid.
+ * Memory
*/
-void *cfs_stack_trace_frame(struct cfs_stack_trace *trace, int frame_no);
-
-#ifndef O_NOACCESS
-#define O_NOACCESS O_NONBLOCK
+#if BITS_PER_LONG == 32
+/* limit to lowmem on 32-bit systems */
+#define NUM_CACHEPAGES \
+ min(cfs_totalram_pages(), 1UL << (30 - PAGE_SHIFT) * 3 / 4)
+#else
+#define NUM_CACHEPAGES cfs_totalram_pages()
#endif
-/*
- * Universal open flags.
- */
-#define CFS_O_NOACCESS 0003
-#define CFS_O_ACCMODE CFS_O_NOACCESS
-#define CFS_O_CREAT 0100
-#define CFS_O_EXCL 0200
-#define CFS_O_NOCTTY 0400
-#define CFS_O_TRUNC 01000
-#define CFS_O_APPEND 02000
-#define CFS_O_NONBLOCK 04000
-#define CFS_O_NDELAY CFS_O_NONBLOCK
-#define CFS_O_SYNC 010000
-#define CFS_O_ASYNC 020000
-#define CFS_O_DIRECT 040000
-#define CFS_O_LARGEFILE 0100000
-#define CFS_O_DIRECTORY 0200000
-#define CFS_O_NOFOLLOW 0400000
-#define CFS_O_NOATIME 01000000
-
-/* convert local open flags to universal open flags */
-int cfs_oflags2univ(int flags);
-/* convert universal open flags to local open flags */
-int cfs_univ2oflags(int flags);
-
-/*
- * Random number handling
- */
-
-/* returns a random 32-bit integer */
-unsigned int cfs_rand(void);
-/* seed the generator */
-void cfs_srand(unsigned int, unsigned int);
-void cfs_get_random_bytes(void *buf, int size);
-
-#include <libcfs/libcfs_debug.h>
-#include <libcfs/libcfs_cpu.h>
-#include <libcfs/libcfs_private.h>
-#include <libcfs/libcfs_ioctl.h>
-#include <libcfs/libcfs_prim.h>
-#include <libcfs/libcfs_time.h>
-#include <libcfs/libcfs_string.h>
-#include <libcfs/libcfs_kernelcomm.h>
-#include <libcfs/libcfs_workitem.h>
-#include <libcfs/libcfs_hash.h>
-#include <libcfs/libcfs_fail.h>
-#include <libcfs/params_tree.h>
-
-/* container_of depends on "likely" which is defined in libcfs_private.h */
-static inline void *__container_of(void *ptr, unsigned long shift)
-{
- if (unlikely(IS_ERR(ptr) || ptr == NULL))
- return ptr;
- else
- return (char *)ptr - shift;
-}
-
-#define container_of0(ptr, type, member) \
- ((type *)__container_of((void *)(ptr), offsetof(type, member)))
-
-#define SET_BUT_UNUSED(a) do { } while(sizeof(a) - sizeof(a))
-
-#define _LIBCFS_H
-
-#endif /* _LIBCFS_H */
+#define wait_var_event_warning(var, condition, format, ...) \
+do { \
+ int counter = 4; \
+ might_sleep(); \
+ if (condition) \
+ break; \
+ ___wait_var_event(var, condition, TASK_UNINTERRUPTIBLE, 0, 0, \
+ if (schedule_timeout(cfs_time_seconds(1)) == 0)\
+ CDEBUG(is_power_of_2(counter++) ? \
+ D_WARNING : D_NET, \
+ format, ## __VA_ARGS__) \
+ ); \
+} while (0)
+
+/* atomic-context safe vfree */
+void libcfs_vfree_atomic(const void *addr);
+
+#endif /* _LIBCFS_LIBCFS_H_ */
git://git.whamcloud.com / fs / lustre-release.git / blobdiff