-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
/*
* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2014, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* @{
*/
+#include <linux/signal.h>
#include <libcfs/libcfs.h>
#include <lustre/lustre_idl.h>
#include <lustre_ver.h>
#include <lustre_cfg.h>
-#if defined(__linux__)
-#include <linux/lustre_lib.h>
-#elif defined(__APPLE__)
-#include <darwin/lustre_lib.h>
-#elif defined(__WINNT__)
-#include <winnt/lustre_lib.h>
-#else
-#error Unsupported operating system.
-#endif
/* target.c */
struct ptlrpc_request;
struct obd_export;
struct lu_target;
+struct l_wait_info;
#include <lustre_ha.h>
#include <lustre_net.h>
-#include <lvfs.h>
+#ifdef HAVE_SERVER_SUPPORT
void target_client_add_cb(struct obd_device *obd, __u64 transno, void *cb_data,
- int error);
+ int error);
+int rev_import_init(struct obd_export *exp);
int target_handle_connect(struct ptlrpc_request *req);
int target_handle_disconnect(struct ptlrpc_request *req);
void target_destroy_export(struct obd_export *exp);
-int target_pack_pool_reply(struct ptlrpc_request *req);
int target_handle_ping(struct ptlrpc_request *req);
void target_committed_to_req(struct ptlrpc_request *req);
-int do_set_info_async(struct obd_import *imp,
- int opcode, int version,
- obd_count keylen, void *key,
- obd_count vallen, void *val,
- struct ptlrpc_request_set *set);
-
-/* quotacheck callback, dqacq/dqrel callback handler */
-int target_handle_qc_callback(struct ptlrpc_request *req);
-#ifdef HAVE_QUOTA_SUPPORT
-int target_handle_dqacq_callback(struct ptlrpc_request *req);
-#else
-#define target_handle_dqacq_callback(req) ldlm_callback_reply(req, -ENOTSUPP)
-#endif
-
-#define OBD_RECOVERY_MAX_TIME (obd_timeout * 18) /* b13079 */
-
void target_cancel_recovery_timer(struct obd_device *obd);
void target_stop_recovery_thread(struct obd_device *obd);
void target_cleanup_recovery(struct obd_device *obd);
int target_queue_recovery_request(struct ptlrpc_request *req,
struct obd_device *obd);
-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;
- __u32 och_magic;
- int och_flags;
-};
-#define OBD_CLIENT_HANDLE_MAGIC 0xd15ea5ed
-
-/* statfs_pack.c */
-void statfs_pack(struct obd_statfs *osfs, cfs_kstatfs_t *sfs);
-void statfs_unpack(cfs_kstatfs_t *sfs, struct obd_statfs *osfs);
-
-/* l_lock.c */
-struct lustre_lock {
- int l_depth;
- cfs_task_t *l_owner;
- cfs_semaphore_t l_sem;
- cfs_spinlock_t l_spin;
-};
-
-void l_lock_init(struct lustre_lock *);
-void l_lock(struct lustre_lock *);
-void l_unlock(struct lustre_lock *);
-int l_has_lock(struct lustre_lock *);
-
-/*
- * 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;
-
- obd_size ioc_count;
- obd_off 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 > (1<<30)) {
- CERROR("OBD ioctl: ioc_len larger than 1<<30\n");
- return 1;
- }
- if (data->ioc_inllen1 > (1<<30)) {
- CERROR("OBD ioctl: ioc_inllen1 larger than 1<<30\n");
- return 1;
- }
- if (data->ioc_inllen2 > (1<<30)) {
- CERROR("OBD ioctl: ioc_inllen2 larger than 1<<30\n");
- return 1;
- }
- if (data->ioc_inllen3 > (1<<30)) {
- CERROR("OBD ioctl: ioc_inllen3 larger than 1<<30\n");
- return 1;
- }
- if (data->ioc_inllen4 > (1<<30)) {
- CERROR("OBD ioctl: ioc_inllen4 larger than 1<<30\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;
-}
-
-#ifndef __KERNEL__
-static inline int obd_ioctl_pack(struct obd_ioctl_data *data, char **pbuf,
- int max)
-{
- char *ptr;
- struct obd_ioctl_data *overlay;
- data->ioc_len = obd_ioctl_packlen(data);
- data->ioc_version = OBD_IOCTL_VERSION;
-
- if (*pbuf && data->ioc_len > max)
- return -EINVAL;
- if (*pbuf == NULL) {
- *pbuf = malloc(data->ioc_len);
- }
- if (!*pbuf)
- return -ENOMEM;
- overlay = (struct obd_ioctl_data *)*pbuf;
- memcpy(*pbuf, data, sizeof(*data));
-
- ptr = overlay->ioc_bulk;
- if (data->ioc_inlbuf1)
- LOGL(data->ioc_inlbuf1, data->ioc_inllen1, ptr);
- if (data->ioc_inlbuf2)
- LOGL(data->ioc_inlbuf2, data->ioc_inllen2, ptr);
- if (data->ioc_inlbuf3)
- LOGL(data->ioc_inlbuf3, data->ioc_inllen3, ptr);
- if (data->ioc_inlbuf4)
- LOGL(data->ioc_inlbuf4, data->ioc_inllen4, ptr);
- if (obd_ioctl_is_invalid(overlay))
- return -EINVAL;
-
- return 0;
-}
-
-static inline int obd_ioctl_unpack(struct obd_ioctl_data *data, char *pbuf,
- int max)
-{
- char *ptr;
- struct obd_ioctl_data *overlay;
-
- if (!pbuf)
- return 1;
- overlay = (struct obd_ioctl_data *)pbuf;
-
- /* Preserve the caller's buffer pointers */
- overlay->ioc_inlbuf1 = data->ioc_inlbuf1;
- overlay->ioc_inlbuf2 = data->ioc_inlbuf2;
- overlay->ioc_inlbuf3 = data->ioc_inlbuf3;
- overlay->ioc_inlbuf4 = data->ioc_inlbuf4;
-
- memcpy(data, pbuf, sizeof(*data));
-
- ptr = overlay->ioc_bulk;
- if (data->ioc_inlbuf1)
- LOGU(data->ioc_inlbuf1, data->ioc_inllen1, ptr);
- if (data->ioc_inlbuf2)
- LOGU(data->ioc_inlbuf2, data->ioc_inllen2, ptr);
- if (data->ioc_inlbuf3)
- LOGU(data->ioc_inlbuf3, data->ioc_inllen3, ptr);
- if (data->ioc_inlbuf4)
- LOGU(data->ioc_inlbuf4, data->ioc_inllen4, ptr);
-
- return 0;
-}
+int target_bulk_io(struct obd_export *exp, struct ptlrpc_bulk_desc *desc,
+ struct l_wait_info *lwi);
#endif
-#include <obd_support.h>
-
-#ifdef __KERNEL__
-/* 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);
-#else
-/* buffer MUST be at least the size of obd_ioctl_hdr */
-static inline int obd_ioctl_getdata(char **buf, int *len, void *arg)
-{
- struct obd_ioctl_hdr hdr;
- struct obd_ioctl_data *data;
- int err;
- int offset = 0;
- ENTRY;
-
- err = cfs_copy_from_user(&hdr, (void *)arg, sizeof(hdr));
- if (err)
- RETURN(err);
-
- if (hdr.ioc_version != OBD_IOCTL_VERSION) {
- CERROR("Version mismatch kernel vs application\n");
- RETURN(-EINVAL);
- }
-
- if (hdr.ioc_len > OBD_MAX_IOCTL_BUFFER) {
- CERROR("User buffer len %d exceeds %d max buffer\n",
- hdr.ioc_len, OBD_MAX_IOCTL_BUFFER);
- RETURN(-EINVAL);
- }
-
- if (hdr.ioc_len < sizeof(struct obd_ioctl_data)) {
- CERROR("User buffer too small for ioctl (%d)\n", hdr.ioc_len);
- RETURN(-EINVAL);
- }
-
- OBD_ALLOC_LARGE(*buf, hdr.ioc_len);
- if (*buf == NULL) {
- CERROR("Cannot allocate control buffer of len %d\n",
- hdr.ioc_len);
- RETURN(-EINVAL);
- }
- *len = hdr.ioc_len;
- data = (struct obd_ioctl_data *)*buf;
-
- err = cfs_copy_from_user(*buf, (void *)arg, hdr.ioc_len);
- if (err) {
- OBD_FREE_LARGE(*buf, hdr.ioc_len);
- RETURN(err);
- }
-
- if (obd_ioctl_is_invalid(data)) {
- CERROR("ioctl not correctly formatted\n");
- OBD_FREE_LARGE(*buf, hdr.ioc_len);
- RETURN(-EINVAL);
- }
-
- if (data->ioc_inllen1) {
- data->ioc_inlbuf1 = &data->ioc_bulk[0];
- offset += cfs_size_round(data->ioc_inllen1);
- }
-
- if (data->ioc_inllen2) {
- data->ioc_inlbuf2 = &data->ioc_bulk[0] + offset;
- offset += cfs_size_round(data->ioc_inllen2);
- }
-
- if (data->ioc_inllen3) {
- data->ioc_inlbuf3 = &data->ioc_bulk[0] + offset;
- offset += cfs_size_round(data->ioc_inllen3);
- }
-
- if (data->ioc_inllen4) {
- data->ioc_inlbuf4 = &data->ioc_bulk[0] + offset;
- }
-
- RETURN(0);
-}
-
-static inline int obd_ioctl_popdata(void *arg, void *data, int len)
-{
- int err = cfs_copy_to_user(arg, data, len);
- if (err)
- err = -EFAULT;
- return err;
-}
-#endif
-
-static inline void obd_ioctl_freedata(char *buf, int len)
-{
- ENTRY;
-
- OBD_FREE_LARGE(buf, len);
- EXIT;
- 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_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_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 <lustre/lustre_user.h> for ioctls 151-153 */
-#define OBD_IOC_LOV_SETSTRIPE _IOW ('f', 154, OBD_IOC_DATA_TYPE)
-#define OBD_IOC_LOV_GETSTRIPE _IOW ('f', 155, OBD_IOC_DATA_TYPE)
-#define OBD_IOC_LOV_SETEA _IOW ('f', 156, OBD_IOC_DATA_TYPE)
-/* see <lustre/lustre_user.h> for ioctls 157-159 */
-#define OBD_IOC_QUOTACHECK _IOW ('f', 160, int)
-#define OBD_IOC_POLL_QUOTACHECK _IOR ('f', 161, struct if_quotacheck *)
-#define OBD_IOC_QUOTACTL _IOWR('f', 162, struct if_quotactl *)
-/* see <lustre/lustre_user.h> for ioctls 163-175 */
-#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_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)
-#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)
-
-/* 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))
+int target_pack_pool_reply(struct ptlrpc_request *req);
+int do_set_info_async(struct obd_import *imp,
+ int opcode, int version,
+ size_t keylen, void *key,
+ size_t vallen, void *val,
+ struct ptlrpc_request_set *set);
-/* #define POISON_BULK 0 */
+void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id);
/*
* l_wait_event is a flexible sleeping function, permitting simple caller
#define LWI_INTR(cb, data) LWI_TIMEOUT_INTR(0, NULL, cb, data)
-#ifdef __KERNEL__
+#define LUSTRE_FATAL_SIGS \
+ (sigmask(SIGKILL) | sigmask(SIGINT) | sigmask(SIGTERM) | \
+ sigmask(SIGQUIT) | sigmask(SIGALRM))
+
+/*
+ * Wait Queue
+ */
+#ifndef HAVE___ADD_WAIT_QUEUE_EXCLUSIVE
+static inline void __add_wait_queue_exclusive(wait_queue_head_t *q,
+ wait_queue_t *wait)
+{
+ wait->flags |= WQ_FLAG_EXCLUSIVE;
+ __add_wait_queue(q, wait);
+}
+#endif /* HAVE___ADD_WAIT_QUEUE_EXCLUSIVE */
+
+/**
+ * wait_queue_t of Linux (version < 2.6.34) is a FIFO list for exclusively
+ * waiting threads, which is not always desirable because all threads will
+ * be waken up again and again, even user only needs a few of them to be
+ * active most time. This is not good for performance because cache can
+ * be polluted by different threads.
+ *
+ * LIFO list can resolve this problem because we always wakeup the most
+ * recent active thread by default.
+ *
+ * NB: please don't call non-exclusive & exclusive wait on the same
+ * waitq if add_wait_queue_exclusive_head is used.
+ */
+#define add_wait_queue_exclusive_head(waitq, link) \
+{ \
+ unsigned long flags; \
+ \
+ spin_lock_irqsave(&((waitq)->lock), flags); \
+ __add_wait_queue_exclusive(waitq, link); \
+ spin_unlock_irqrestore(&((waitq)->lock), flags); \
+}
/*
* wait for @condition to become true, but no longer than timeout, specified
*/
#define __l_wait_event(wq, condition, info, ret, l_add_wait) \
do { \
- cfs_waitlink_t __wait; \
- cfs_duration_t __timeout = info->lwi_timeout; \
- cfs_sigset_t __blocked; \
- int __allow_intr = info->lwi_allow_intr; \
- \
- ret = 0; \
- if (condition) \
- break; \
- \
- cfs_waitlink_init(&__wait); \
- 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) ? \
- CFS_TASK_INTERRUPTIBLE : CFS_TASK_UNINT; \
- \
- cfs_set_current_state(CFS_TASK_INTERRUPTIBLE); \
- \
- if (condition) \
- break; \
- \
- if (__timeout == 0) { \
- cfs_waitq_wait(&__wait, __wstate); \
- } else { \
- cfs_duration_t interval = info->lwi_interval? \
- min_t(cfs_duration_t, \
- info->lwi_interval,__timeout):\
- __timeout; \
- cfs_duration_t remaining = cfs_waitq_timedwait(&__wait,\
- __wstate, \
- 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);\
- } \
- } \
+ wait_queue_t __wait; \
+ cfs_duration_t __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 (;;) { \
+ set_current_state(TASK_INTERRUPTIBLE); \
+ \
+ if (condition) \
+ break; \
+ \
+ if (__timeout == 0) { \
+ schedule(); \
+ } else { \
+ cfs_duration_t interval = info->lwi_interval? \
+ min_t(cfs_duration_t, \
+ info->lwi_interval,__timeout):\
+ __timeout; \
+ cfs_duration_t 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 (signal_pending(current)) { \
if (info->lwi_on_signal != NULL && \
(__timeout == 0 || __allow_intr)) { \
if (info->lwi_on_signal != LWI_ON_SIGNAL_NOOP) \
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(); \
+ /* 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_block_sigs(__blocked); \
+ cfs_restore_sigs(__blocked); \
\
- cfs_set_current_state(CFS_TASK_RUNNING); \
- cfs_waitq_del(&wq, &__wait); \
-} while (0)
-
-#else /* !__KERNEL__ */
-#define __l_wait_event(wq, condition, info, ret, l_add_wait) \
-do { \
- long __timeout = info->lwi_timeout; \
- long __now; \
- long __then = 0; \
- int __timed_out = 0; \
- int __interval = obd_timeout; \
- \
- ret = 0; \
- if (condition) \
- break; \
- \
- if (__timeout != 0) \
- __then = time(NULL); \
- \
- if (__timeout && __timeout < __interval) \
- __interval = __timeout; \
- if (info->lwi_interval && info->lwi_interval < __interval) \
- __interval = info->lwi_interval; \
- \
- while (!(condition)) { \
- liblustre_wait_event(__interval); \
- if (condition) \
- break; \
- \
- if (!__timed_out && info->lwi_timeout != 0) { \
- __now = time(NULL); \
- __timeout -= __now - __then; \
- __then = __now; \
- \
- if (__timeout > 0) \
- continue; \
- \
- __timeout = 0; \
- __timed_out = 1; \
- if (info->lwi_on_timeout == NULL || \
- info->lwi_on_timeout(info->lwi_cb_data)) { \
- ret = -ETIMEDOUT; \
- break; \
- } \
- } \
- } \
+ set_current_state(TASK_RUNNING); \
+ remove_wait_queue(&wq, &__wait); \
} while (0)
-#endif /* __KERNEL__ */
-
#define l_wait_event(wq, condition, info) \
({ \
- int __ret; \
- struct l_wait_info *__info = (info); \
- \
- __l_wait_event(wq, condition, __info, \
- __ret, cfs_waitq_add); \
- __ret; \
+ 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, cfs_waitq_add_exclusive); \
- __ret; \
+ 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, cfs_waitq_add_exclusive_head); \
- __ret; \
+ 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) \
l_wait_event_exclusive_head(wq, condition, &lwi); \
})
-#ifdef __KERNEL__
-#define LIBLUSTRE_CLIENT (0)
-#else
-#define LIBLUSTRE_CLIENT (1)
-#endif
-
/** @} lib */
#endif /* _LUSTRE_LIB_H */
git://git.whamcloud.com / fs / lustre-release.git / blobdiff