--- /dev/null
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * 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.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2012, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/include/lustre_lib.h
+ *
+ * Basic Lustre library routines.
+ */
+
+#ifndef _LUSTRE_LIB_H
+#define _LUSTRE_LIB_H
+
+/** \defgroup lib lib
+ *
+ * @{
+ */
+
+#include <linux/sched.h>
+#include <linux/signal.h>
+#include <linux/types.h>
+#include "../../include/linux/libcfs/libcfs.h"
+#include "lustre/lustre_idl.h"
+#include "lustre_ver.h"
+#include "lustre_cfg.h"
+
+/* target.c */
+struct kstatfs;
+struct ptlrpc_request;
+struct obd_export;
+struct lu_target;
+struct l_wait_info;
+#include "lustre_ha.h"
+#include "lustre_net.h"
+
+#define LI_POISON 0x5a5a5a5a
+#if BITS_PER_LONG > 32
+# define LL_POISON 0x5a5a5a5a5a5a5a5aL
+#else
+# define LL_POISON 0x5a5a5a5aL
+#endif
+#define LP_POISON ((void *)LL_POISON)
+
+int target_pack_pool_reply(struct ptlrpc_request *req);
+int do_set_info_async(struct obd_import *imp,
+ int opcode, int version,
+ u32 keylen, void *key,
+ u32 vallen, void *val,
+ struct ptlrpc_request_set *set);
+
+#define OBD_RECOVERY_MAX_TIME (obd_timeout * 18) /* b13079 */
+#define OBD_MAX_IOCTL_BUFFER CONFIG_LUSTRE_OBD_MAX_IOCTL_BUFFER
+
+void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id);
+
+/* client.c */
+
+int client_sanobd_setup(struct obd_device *obddev, struct lustre_cfg *lcfg);
+struct client_obd *client_conn2cli(struct lustre_handle *conn);
+
+struct md_open_data;
+struct obd_client_handle {
+ struct lustre_handle och_fh;
+ struct lu_fid och_fid;
+ struct md_open_data *och_mod;
+ struct lustre_handle och_lease_handle; /* open lock for lease */
+ __u32 och_magic;
+ fmode_t och_flags;
+};
+#define OBD_CLIENT_HANDLE_MAGIC 0xd15ea5ed
+
+/* statfs_pack.c */
+void statfs_pack(struct obd_statfs *osfs, struct kstatfs *sfs);
+void statfs_unpack(struct kstatfs *sfs, struct obd_statfs *osfs);
+
+/*
+ * For md echo client
+ */
+enum md_echo_cmd {
+ ECHO_MD_CREATE = 1, /* Open/Create file on MDT */
+ ECHO_MD_MKDIR = 2, /* Mkdir on MDT */
+ ECHO_MD_DESTROY = 3, /* Unlink file on MDT */
+ ECHO_MD_RMDIR = 4, /* Rmdir on MDT */
+ ECHO_MD_LOOKUP = 5, /* Lookup on MDT */
+ ECHO_MD_GETATTR = 6, /* Getattr on MDT */
+ ECHO_MD_SETATTR = 7, /* Setattr on MDT */
+ ECHO_MD_ALLOC_FID = 8, /* Get FIDs from MDT */
+};
+
+/*
+ * OBD IOCTLS
+ */
+#define OBD_IOCTL_VERSION 0x00010004
+
+struct obd_ioctl_data {
+ __u32 ioc_len;
+ __u32 ioc_version;
+
+ union {
+ __u64 ioc_cookie;
+ __u64 ioc_u64_1;
+ };
+ union {
+ __u32 ioc_conn1;
+ __u32 ioc_u32_1;
+ };
+ union {
+ __u32 ioc_conn2;
+ __u32 ioc_u32_2;
+ };
+
+ struct obdo ioc_obdo1;
+ struct obdo ioc_obdo2;
+
+ u64 ioc_count;
+ u64 ioc_offset;
+ __u32 ioc_dev;
+ __u32 ioc_command;
+
+ __u64 ioc_nid;
+ __u32 ioc_nal;
+ __u32 ioc_type;
+
+ /* buffers the kernel will treat as user pointers */
+ __u32 ioc_plen1;
+ char *ioc_pbuf1;
+ __u32 ioc_plen2;
+ char *ioc_pbuf2;
+
+ /* inline buffers for various arguments */
+ __u32 ioc_inllen1;
+ char *ioc_inlbuf1;
+ __u32 ioc_inllen2;
+ char *ioc_inlbuf2;
+ __u32 ioc_inllen3;
+ char *ioc_inlbuf3;
+ __u32 ioc_inllen4;
+ char *ioc_inlbuf4;
+
+ char ioc_bulk[0];
+};
+
+struct obd_ioctl_hdr {
+ __u32 ioc_len;
+ __u32 ioc_version;
+};
+
+static inline int obd_ioctl_packlen(struct obd_ioctl_data *data)
+{
+ int len = cfs_size_round(sizeof(struct obd_ioctl_data));
+ len += cfs_size_round(data->ioc_inllen1);
+ len += cfs_size_round(data->ioc_inllen2);
+ len += cfs_size_round(data->ioc_inllen3);
+ len += cfs_size_round(data->ioc_inllen4);
+ return len;
+}
+
+
+static inline int obd_ioctl_is_invalid(struct obd_ioctl_data *data)
+{
+ if (data->ioc_len > OBD_MAX_IOCTL_BUFFER) {
+ CERROR("OBD ioctl: ioc_len larger than %d\n",
+ OBD_MAX_IOCTL_BUFFER);
+ return 1;
+ }
+ if (data->ioc_inllen1 > OBD_MAX_IOCTL_BUFFER) {
+ CERROR("OBD ioctl: ioc_inllen1 larger than ioc_len\n");
+ return 1;
+ }
+ if (data->ioc_inllen2 > OBD_MAX_IOCTL_BUFFER) {
+ CERROR("OBD ioctl: ioc_inllen2 larger than ioc_len\n");
+ return 1;
+ }
+ if (data->ioc_inllen3 > OBD_MAX_IOCTL_BUFFER) {
+ CERROR("OBD ioctl: ioc_inllen3 larger than ioc_len\n");
+ return 1;
+ }
+ if (data->ioc_inllen4 > OBD_MAX_IOCTL_BUFFER) {
+ CERROR("OBD ioctl: ioc_inllen4 larger than ioc_len\n");
+ return 1;
+ }
+ if (data->ioc_inlbuf1 && !data->ioc_inllen1) {
+ CERROR("OBD ioctl: inlbuf1 pointer but 0 length\n");
+ return 1;
+ }
+ if (data->ioc_inlbuf2 && !data->ioc_inllen2) {
+ CERROR("OBD ioctl: inlbuf2 pointer but 0 length\n");
+ return 1;
+ }
+ if (data->ioc_inlbuf3 && !data->ioc_inllen3) {
+ CERROR("OBD ioctl: inlbuf3 pointer but 0 length\n");
+ return 1;
+ }
+ if (data->ioc_inlbuf4 && !data->ioc_inllen4) {
+ CERROR("OBD ioctl: inlbuf4 pointer but 0 length\n");
+ return 1;
+ }
+ if (data->ioc_pbuf1 && !data->ioc_plen1) {
+ CERROR("OBD ioctl: pbuf1 pointer but 0 length\n");
+ return 1;
+ }
+ if (data->ioc_pbuf2 && !data->ioc_plen2) {
+ CERROR("OBD ioctl: pbuf2 pointer but 0 length\n");
+ return 1;
+ }
+ if (data->ioc_plen1 && !data->ioc_pbuf1) {
+ CERROR("OBD ioctl: plen1 set but NULL pointer\n");
+ return 1;
+ }
+ if (data->ioc_plen2 && !data->ioc_pbuf2) {
+ CERROR("OBD ioctl: plen2 set but NULL pointer\n");
+ return 1;
+ }
+ if (obd_ioctl_packlen(data) > data->ioc_len) {
+ CERROR("OBD ioctl: packlen exceeds ioc_len (%d > %d)\n",
+ obd_ioctl_packlen(data), data->ioc_len);
+ return 1;
+ }
+ return 0;
+}
+
+
+#include "obd_support.h"
+
+/* function defined in lustre/obdclass/<platform>/<platform>-module.c */
+int obd_ioctl_getdata(char **buf, int *len, void *arg);
+int obd_ioctl_popdata(void *arg, void *data, int len);
+
+static inline void obd_ioctl_freedata(char *buf, int len)
+{
+ OBD_FREE_LARGE(buf, len);
+ return;
+}
+
+/*
+ * BSD ioctl description:
+ * #define IOC_V1 _IOR(g, n1, long)
+ * #define IOC_V2 _IOW(g, n2, long)
+ *
+ * ioctl(f, IOC_V1, arg);
+ * arg will be treated as a long value,
+ *
+ * ioctl(f, IOC_V2, arg)
+ * arg will be treated as a pointer, bsd will call
+ * copyin(buf, arg, sizeof(long))
+ *
+ * To make BSD ioctl handles argument correctly and simplely,
+ * we change _IOR to _IOWR so BSD will copyin obd_ioctl_data
+ * for us. Does this change affect Linux? (XXX Liang)
+ */
+#define OBD_IOC_DATA_TYPE long
+
+#define OBD_IOC_CREATE _IOWR('f', 101, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_DESTROY _IOW ('f', 104, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_PREALLOCATE _IOWR('f', 105, OBD_IOC_DATA_TYPE)
+
+#define OBD_IOC_SETATTR _IOW ('f', 107, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_GETATTR _IOWR ('f', 108, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_READ _IOWR('f', 109, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_WRITE _IOWR('f', 110, OBD_IOC_DATA_TYPE)
+
+
+#define OBD_IOC_STATFS _IOWR('f', 113, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_SYNC _IOW ('f', 114, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_READ2 _IOWR('f', 115, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_FORMAT _IOWR('f', 116, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_PARTITION _IOWR('f', 117, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_COPY _IOWR('f', 120, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_MIGR _IOWR('f', 121, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_PUNCH _IOWR('f', 122, OBD_IOC_DATA_TYPE)
+
+#define OBD_IOC_MODULE_DEBUG _IOWR('f', 124, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_BRW_READ _IOWR('f', 125, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_BRW_WRITE _IOWR('f', 126, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_NAME2DEV _IOWR('f', 127, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_UUID2DEV _IOWR('f', 130, OBD_IOC_DATA_TYPE)
+
+#define OBD_IOC_GETNAME _IOWR('f', 131, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_GETMDNAME _IOR('f', 131, char[MAX_OBD_NAME])
+#define OBD_IOC_GETDTNAME OBD_IOC_GETNAME
+
+#define OBD_IOC_LOV_GET_CONFIG _IOWR('f', 132, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_CLIENT_RECOVER _IOW ('f', 133, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_PING_TARGET _IOW ('f', 136, OBD_IOC_DATA_TYPE)
+
+#define OBD_IOC_DEC_FS_USE_COUNT _IO ('f', 139 )
+#define OBD_IOC_NO_TRANSNO _IOW ('f', 140, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_SET_READONLY _IOW ('f', 141, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_ABORT_RECOVERY _IOR ('f', 142, OBD_IOC_DATA_TYPE)
+
+#define OBD_IOC_ROOT_SQUASH _IOWR('f', 143, OBD_IOC_DATA_TYPE)
+
+#define OBD_GET_VERSION _IOWR ('f', 144, OBD_IOC_DATA_TYPE)
+
+#define OBD_IOC_GSS_SUPPORT _IOWR('f', 145, OBD_IOC_DATA_TYPE)
+
+#define OBD_IOC_CLOSE_UUID _IOWR ('f', 147, OBD_IOC_DATA_TYPE)
+
+#define OBD_IOC_CHANGELOG_SEND _IOW ('f', 148, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_GETDEVICE _IOWR ('f', 149, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_FID2PATH _IOWR ('f', 150, OBD_IOC_DATA_TYPE)
+/* see also <lustre/lustre_user.h> for ioctls 151-153 */
+/* OBD_IOC_LOV_SETSTRIPE: See also LL_IOC_LOV_SETSTRIPE */
+#define OBD_IOC_LOV_SETSTRIPE _IOW ('f', 154, OBD_IOC_DATA_TYPE)
+/* OBD_IOC_LOV_GETSTRIPE: See also LL_IOC_LOV_GETSTRIPE */
+#define OBD_IOC_LOV_GETSTRIPE _IOW ('f', 155, OBD_IOC_DATA_TYPE)
+/* OBD_IOC_LOV_SETEA: See also LL_IOC_LOV_SETEA */
+#define OBD_IOC_LOV_SETEA _IOW ('f', 156, OBD_IOC_DATA_TYPE)
+/* see <lustre/lustre_user.h> for ioctls 157-159 */
+/* OBD_IOC_QUOTACHECK: See also LL_IOC_QUOTACHECK */
+#define OBD_IOC_QUOTACHECK _IOW ('f', 160, int)
+/* OBD_IOC_POLL_QUOTACHECK: See also LL_IOC_POLL_QUOTACHECK */
+#define OBD_IOC_POLL_QUOTACHECK _IOR ('f', 161, struct if_quotacheck *)
+/* OBD_IOC_QUOTACTL: See also LL_IOC_QUOTACTL */
+#define OBD_IOC_QUOTACTL _IOWR('f', 162, struct if_quotactl)
+/* see also <lustre/lustre_user.h> for ioctls 163-176 */
+#define OBD_IOC_CHANGELOG_REG _IOW ('f', 177, struct obd_ioctl_data)
+#define OBD_IOC_CHANGELOG_DEREG _IOW ('f', 178, struct obd_ioctl_data)
+#define OBD_IOC_CHANGELOG_CLEAR _IOW ('f', 179, struct obd_ioctl_data)
+#define OBD_IOC_RECORD _IOWR('f', 180, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_ENDRECORD _IOWR('f', 181, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_PARSE _IOWR('f', 182, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_DORECORD _IOWR('f', 183, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_PROCESS_CFG _IOWR('f', 184, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_DUMP_LOG _IOWR('f', 185, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_CLEAR_LOG _IOWR('f', 186, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_PARAM _IOW ('f', 187, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_POOL _IOWR('f', 188, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_REPLACE_NIDS _IOWR('f', 189, OBD_IOC_DATA_TYPE)
+
+#define OBD_IOC_CATLOGLIST _IOWR('f', 190, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_LLOG_INFO _IOWR('f', 191, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_LLOG_PRINT _IOWR('f', 192, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_LLOG_CANCEL _IOWR('f', 193, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_LLOG_REMOVE _IOWR('f', 194, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_LLOG_CHECK _IOWR('f', 195, OBD_IOC_DATA_TYPE)
+/* OBD_IOC_LLOG_CATINFO is deprecated */
+#define OBD_IOC_LLOG_CATINFO _IOWR('f', 196, OBD_IOC_DATA_TYPE)
+
+#define ECHO_IOC_GET_STRIPE _IOWR('f', 200, OBD_IOC_DATA_TYPE)
+#define ECHO_IOC_SET_STRIPE _IOWR('f', 201, OBD_IOC_DATA_TYPE)
+#define ECHO_IOC_ENQUEUE _IOWR('f', 202, OBD_IOC_DATA_TYPE)
+#define ECHO_IOC_CANCEL _IOWR('f', 203, OBD_IOC_DATA_TYPE)
+
+#define OBD_IOC_GET_OBJ_VERSION _IOR('f', 210, OBD_IOC_DATA_TYPE)
+
+/* <lustre/lustre_user.h> defines ioctl number 218-219 */
+#define OBD_IOC_GET_MNTOPT _IOW('f', 220, mntopt_t)
+
+#define OBD_IOC_ECHO_MD _IOR('f', 221, struct obd_ioctl_data)
+#define OBD_IOC_ECHO_ALLOC_SEQ _IOWR('f', 222, struct obd_ioctl_data)
+
+#define OBD_IOC_START_LFSCK _IOWR('f', 230, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_STOP_LFSCK _IOW('f', 231, OBD_IOC_DATA_TYPE)
+#define OBD_IOC_PAUSE_LFSCK _IOW('f', 232, OBD_IOC_DATA_TYPE)
+
+/* XXX _IOWR('f', 250, long) has been defined in
+ * libcfs/include/libcfs/libcfs_private.h for debug, don't use it
+ */
+
+/* Until such time as we get_info the per-stripe maximum from the OST,
+ * we define this to be 2T - 4k, which is the ext3 maxbytes. */
+#define LUSTRE_STRIPE_MAXBYTES 0x1fffffff000ULL
+
+/* Special values for remove LOV EA from disk */
+#define LOVEA_DELETE_VALUES(size, count, offset) (size == 0 && count == 0 && \
+ offset == (typeof(offset))(-1))
+
+/* #define POISON_BULK 0 */
+
+/*
+ * l_wait_event is a flexible sleeping function, permitting simple caller
+ * configuration of interrupt and timeout sensitivity along with actions to
+ * be performed in the event of either exception.
+ *
+ * The first form of usage looks like this:
+ *
+ * struct l_wait_info lwi = LWI_TIMEOUT_INTR(timeout, timeout_handler,
+ * intr_handler, callback_data);
+ * rc = l_wait_event(waitq, condition, &lwi);
+ *
+ * l_wait_event() makes the current process wait on 'waitq' until 'condition'
+ * is TRUE or a "killable" signal (SIGTERM, SIKGILL, SIGINT) is pending. It
+ * returns 0 to signify 'condition' is TRUE, but if a signal wakes it before
+ * 'condition' becomes true, it optionally calls the specified 'intr_handler'
+ * if not NULL, and returns -EINTR.
+ *
+ * If a non-zero timeout is specified, signals are ignored until the timeout
+ * has expired. At this time, if 'timeout_handler' is not NULL it is called.
+ * If it returns FALSE l_wait_event() continues to wait as described above with
+ * signals enabled. Otherwise it returns -ETIMEDOUT.
+ *
+ * LWI_INTR(intr_handler, callback_data) is shorthand for
+ * LWI_TIMEOUT_INTR(0, NULL, intr_handler, callback_data)
+ *
+ * The second form of usage looks like this:
+ *
+ * struct l_wait_info lwi = LWI_TIMEOUT(timeout, timeout_handler);
+ * rc = l_wait_event(waitq, condition, &lwi);
+ *
+ * This form is the same as the first except that it COMPLETELY IGNORES
+ * SIGNALS. The caller must therefore beware that if 'timeout' is zero, or if
+ * 'timeout_handler' is not NULL and returns FALSE, then the ONLY thing that
+ * can unblock the current process is 'condition' becoming TRUE.
+ *
+ * Another form of usage is:
+ * struct l_wait_info lwi = LWI_TIMEOUT_INTERVAL(timeout, interval,
+ * timeout_handler);
+ * rc = l_wait_event(waitq, condition, &lwi);
+ * This is the same as previous case, but condition is checked once every
+ * 'interval' jiffies (if non-zero).
+ *
+ * Subtle synchronization point: this macro does *not* necessary takes
+ * wait-queue spin-lock before returning, and, hence, following idiom is safe
+ * ONLY when caller provides some external locking:
+ *
+ * Thread1 Thread2
+ *
+ * l_wait_event(&obj->wq, ....); (1)
+ *
+ * wake_up(&obj->wq): (2)
+ * spin_lock(&q->lock); (2.1)
+ * __wake_up_common(q, ...); (2.2)
+ * spin_unlock(&q->lock, flags); (2.3)
+ *
+ * OBD_FREE_PTR(obj); (3)
+ *
+ * As l_wait_event() may "short-cut" execution and return without taking
+ * wait-queue spin-lock, some additional synchronization is necessary to
+ * guarantee that step (3) can begin only after (2.3) finishes.
+ *
+ * XXX nikita: some ptlrpc daemon threads have races of that sort.
+ *
+ */
+static inline int back_to_sleep(void *arg)
+{
+ return 0;
+}
+
+#define LWI_ON_SIGNAL_NOOP ((void (*)(void *))(-1))
+
+struct l_wait_info {
+ long lwi_timeout;
+ long lwi_interval;
+ int lwi_allow_intr;
+ int (*lwi_on_timeout)(void *);
+ void (*lwi_on_signal)(void *);
+ void *lwi_cb_data;
+};
+
+/* NB: LWI_TIMEOUT ignores signals completely */
+#define LWI_TIMEOUT(time, cb, data) \
+((struct l_wait_info) { \
+ .lwi_timeout = time, \
+ .lwi_on_timeout = cb, \
+ .lwi_cb_data = data, \
+ .lwi_interval = 0, \
+ .lwi_allow_intr = 0 \
+})
+
+#define LWI_TIMEOUT_INTERVAL(time, interval, cb, data) \
+((struct l_wait_info) { \
+ .lwi_timeout = time, \
+ .lwi_on_timeout = cb, \
+ .lwi_cb_data = data, \
+ .lwi_interval = interval, \
+ .lwi_allow_intr = 0 \
+})
+
+#define LWI_TIMEOUT_INTR(time, time_cb, sig_cb, data) \
+((struct l_wait_info) { \
+ .lwi_timeout = time, \
+ .lwi_on_timeout = time_cb, \
+ .lwi_on_signal = sig_cb, \
+ .lwi_cb_data = data, \
+ .lwi_interval = 0, \
+ .lwi_allow_intr = 0 \
+})
+
+#define LWI_TIMEOUT_INTR_ALL(time, time_cb, sig_cb, data) \
+((struct l_wait_info) { \
+ .lwi_timeout = time, \
+ .lwi_on_timeout = time_cb, \
+ .lwi_on_signal = sig_cb, \
+ .lwi_cb_data = data, \
+ .lwi_interval = 0, \
+ .lwi_allow_intr = 1 \
+})
+
+#define LWI_INTR(cb, data) LWI_TIMEOUT_INTR(0, NULL, cb, data)
+
+#define LUSTRE_FATAL_SIGS (sigmask(SIGKILL) | sigmask(SIGINT) | \
+ sigmask(SIGTERM) | sigmask(SIGQUIT) | \
+ sigmask(SIGALRM))
+
+
+/*
+ * wait for @condition to become true, but no longer than timeout, specified
+ * by @info.
+ */
+#define __l_wait_event(wq, condition, info, ret, l_add_wait) \
+do { \
+ wait_queue_t __wait; \
+ long __timeout = info->lwi_timeout; \
+ sigset_t __blocked; \
+ int __allow_intr = info->lwi_allow_intr; \
+ \
+ ret = 0; \
+ if (condition) \
+ break; \
+ \
+ init_waitqueue_entry(&__wait, current); \
+ l_add_wait(&wq, &__wait); \
+ \
+ /* Block all signals (just the non-fatal ones if no timeout). */ \
+ if (info->lwi_on_signal != NULL && (__timeout == 0 || __allow_intr)) \
+ __blocked = cfs_block_sigsinv(LUSTRE_FATAL_SIGS); \
+ else \
+ __blocked = cfs_block_sigsinv(0); \
+ \
+ for (;;) { \
+ unsigned __wstate; \
+ \
+ __wstate = info->lwi_on_signal != NULL && \
+ (__timeout == 0 || __allow_intr) ? \
+ TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE; \
+ \
+ set_current_state(TASK_INTERRUPTIBLE); \
+ \
+ if (condition) \
+ break; \
+ \
+ if (__timeout == 0) { \
+ schedule(); \
+ } else { \
+ long interval = info->lwi_interval? \
+ min_t(long, \
+ info->lwi_interval,__timeout):\
+ __timeout; \
+ long remaining = schedule_timeout(interval);\
+ __timeout = cfs_time_sub(__timeout, \
+ cfs_time_sub(interval, remaining));\
+ if (__timeout == 0) { \
+ if (info->lwi_on_timeout == NULL || \
+ info->lwi_on_timeout(info->lwi_cb_data)) { \
+ ret = -ETIMEDOUT; \
+ break; \
+ } \
+ /* Take signals after the timeout expires. */ \
+ if (info->lwi_on_signal != NULL) \
+ (void)cfs_block_sigsinv(LUSTRE_FATAL_SIGS);\
+ } \
+ } \
+ \
+ if (condition) \
+ break; \
+ if (cfs_signal_pending()) { \
+ if (info->lwi_on_signal != NULL && \
+ (__timeout == 0 || __allow_intr)) { \
+ if (info->lwi_on_signal != LWI_ON_SIGNAL_NOOP) \
+ info->lwi_on_signal(info->lwi_cb_data);\
+ ret = -EINTR; \
+ break; \
+ } \
+ /* We have to do this here because some signals */ \
+ /* are not blockable - ie from strace(1). */ \
+ /* In these cases we want to schedule_timeout() */ \
+ /* again, because we don't want that to return */ \
+ /* -EINTR when the RPC actually succeeded. */ \
+ /* the recalc_sigpending() below will deliver the */ \
+ /* signal properly. */ \
+ cfs_clear_sigpending(); \
+ } \
+ } \
+ \
+ cfs_restore_sigs(__blocked); \
+ \
+ set_current_state(TASK_RUNNING); \
+ remove_wait_queue(&wq, &__wait); \
+} while (0)
+
+
+
+#define l_wait_event(wq, condition, info) \
+({ \
+ int __ret; \
+ struct l_wait_info *__info = (info); \
+ \
+ __l_wait_event(wq, condition, __info, \
+ __ret, add_wait_queue); \
+ __ret; \
+})
+
+#define l_wait_event_exclusive(wq, condition, info) \
+({ \
+ int __ret; \
+ struct l_wait_info *__info = (info); \
+ \
+ __l_wait_event(wq, condition, __info, \
+ __ret, add_wait_queue_exclusive); \
+ __ret; \
+})
+
+#define l_wait_event_exclusive_head(wq, condition, info) \
+({ \
+ int __ret; \
+ struct l_wait_info *__info = (info); \
+ \
+ __l_wait_event(wq, condition, __info, \
+ __ret, add_wait_queue_exclusive_head); \
+ __ret; \
+})
+
+#define l_wait_condition(wq, condition) \
+({ \
+ struct l_wait_info lwi = { 0 }; \
+ l_wait_event(wq, condition, &lwi); \
+})
+
+#define l_wait_condition_exclusive(wq, condition) \
+({ \
+ struct l_wait_info lwi = { 0 }; \
+ l_wait_event_exclusive(wq, condition, &lwi); \
+})
+
+#define l_wait_condition_exclusive_head(wq, condition) \
+({ \
+ struct l_wait_info lwi = { 0 }; \
+ l_wait_event_exclusive_head(wq, condition, &lwi); \
+})
+
+#define LIBLUSTRE_CLIENT (0)
+
+/** @} lib */
+
+#endif /* _LUSTRE_LIB_H */
Code Review / kvmfornfv.git / blobdiff