diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/include/lustre_lib.h')
| -rw-r--r-- | drivers/staging/lustre/lustre/include/lustre_lib.h | 667 |
1 files changed, 667 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/include/lustre_lib.h b/drivers/staging/lustre/lustre/include/lustre_lib.h new file mode 100644 index 000000000000..bdfc5391c6d2 --- /dev/null +++ b/drivers/staging/lustre/lustre/include/lustre_lib.h @@ -0,0 +1,667 @@ +/* + * 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/libcfs/libcfs.h> +#include <lustre/lustre_idl.h> +#include <lustre_ver.h> +#include <lustre_cfg.h> +#include <linux/lustre_lib.h> + +/* 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> + + +int target_pack_pool_reply(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); + +#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; + __u32 och_magic; + int 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); + +/* l_lock.c */ +struct lustre_lock { + int l_depth; + task_t *l_owner; + struct semaphore l_sem; + 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 *); + +/* + * 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; + + 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; +} + + +#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) +{ + 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_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 { + cfs_duration_t lwi_timeout; + cfs_duration_t 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) + + +/* + * 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; \ + 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_current(&__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) ? \ + TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE; \ + \ + set_current_state(TASK_INTERRUPTIBLE); \ + \ + if (condition) \ + break; \ + \ + if (__timeout == 0) { \ + 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 = 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);\ + } \ + } \ + \ + 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 */ |