| /* |
| * 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) 2003, 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. |
| */ |
| |
| #define DEBUG_SUBSYSTEM S_MDC |
| #include <lustre_net.h> |
| #include <lustre/lustre_idl.h> |
| #include "mdc_internal.h" |
| |
| |
| static void __mdc_pack_body(struct mdt_body *b, __u32 suppgid) |
| { |
| LASSERT (b != NULL); |
| |
| b->suppgid = suppgid; |
| b->uid = current_uid(); |
| b->gid = current_gid(); |
| b->fsuid = current_fsuid(); |
| b->fsgid = current_fsgid(); |
| b->capability = cfs_curproc_cap_pack(); |
| } |
| |
| void mdc_pack_capa(struct ptlrpc_request *req, const struct req_msg_field *field, |
| struct obd_capa *oc) |
| { |
| struct req_capsule *pill = &req->rq_pill; |
| struct lustre_capa *c; |
| |
| if (oc == NULL) { |
| LASSERT(req_capsule_get_size(pill, field, RCL_CLIENT) == 0); |
| return; |
| } |
| |
| c = req_capsule_client_get(pill, field); |
| LASSERT(c != NULL); |
| capa_cpy(c, oc); |
| DEBUG_CAPA(D_SEC, c, "pack"); |
| } |
| |
| void mdc_is_subdir_pack(struct ptlrpc_request *req, const struct lu_fid *pfid, |
| const struct lu_fid *cfid, int flags) |
| { |
| struct mdt_body *b = req_capsule_client_get(&req->rq_pill, |
| &RMF_MDT_BODY); |
| |
| if (pfid) { |
| b->fid1 = *pfid; |
| b->valid = OBD_MD_FLID; |
| } |
| if (cfid) |
| b->fid2 = *cfid; |
| b->flags = flags; |
| } |
| |
| void mdc_swap_layouts_pack(struct ptlrpc_request *req, |
| struct md_op_data *op_data) |
| { |
| struct mdt_body *b = req_capsule_client_get(&req->rq_pill, |
| &RMF_MDT_BODY); |
| |
| __mdc_pack_body(b, op_data->op_suppgids[0]); |
| b->fid1 = op_data->op_fid1; |
| b->fid2 = op_data->op_fid2; |
| b->valid |= OBD_MD_FLID; |
| |
| mdc_pack_capa(req, &RMF_CAPA1, op_data->op_capa1); |
| mdc_pack_capa(req, &RMF_CAPA2, op_data->op_capa2); |
| } |
| |
| void mdc_pack_body(struct ptlrpc_request *req, |
| const struct lu_fid *fid, struct obd_capa *oc, |
| __u64 valid, int ea_size, __u32 suppgid, int flags) |
| { |
| struct mdt_body *b = req_capsule_client_get(&req->rq_pill, |
| &RMF_MDT_BODY); |
| LASSERT(b != NULL); |
| b->valid = valid; |
| b->eadatasize = ea_size; |
| b->flags = flags; |
| __mdc_pack_body(b, suppgid); |
| if (fid) { |
| b->fid1 = *fid; |
| b->valid |= OBD_MD_FLID; |
| mdc_pack_capa(req, &RMF_CAPA1, oc); |
| } |
| } |
| |
| void mdc_readdir_pack(struct ptlrpc_request *req, __u64 pgoff, |
| __u32 size, const struct lu_fid *fid, struct obd_capa *oc) |
| { |
| struct mdt_body *b = req_capsule_client_get(&req->rq_pill, |
| &RMF_MDT_BODY); |
| b->fid1 = *fid; |
| b->valid |= OBD_MD_FLID; |
| b->size = pgoff; /* !! */ |
| b->nlink = size; /* !! */ |
| __mdc_pack_body(b, -1); |
| b->mode = LUDA_FID | LUDA_TYPE; |
| |
| mdc_pack_capa(req, &RMF_CAPA1, oc); |
| } |
| |
| /* packing of MDS records */ |
| void mdc_create_pack(struct ptlrpc_request *req, struct md_op_data *op_data, |
| const void *data, int datalen, __u32 mode, |
| __u32 uid, __u32 gid, cfs_cap_t cap_effective, __u64 rdev) |
| { |
| struct mdt_rec_create *rec; |
| char *tmp; |
| __u64 flags; |
| |
| CLASSERT(sizeof(struct mdt_rec_reint) == sizeof(struct mdt_rec_create)); |
| rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT); |
| |
| |
| rec->cr_opcode = REINT_CREATE; |
| rec->cr_fsuid = uid; |
| rec->cr_fsgid = gid; |
| rec->cr_cap = cap_effective; |
| rec->cr_fid1 = op_data->op_fid1; |
| rec->cr_fid2 = op_data->op_fid2; |
| rec->cr_mode = mode; |
| rec->cr_rdev = rdev; |
| rec->cr_time = op_data->op_mod_time; |
| rec->cr_suppgid1 = op_data->op_suppgids[0]; |
| rec->cr_suppgid2 = op_data->op_suppgids[1]; |
| flags = op_data->op_flags & MF_SOM_LOCAL_FLAGS; |
| if (op_data->op_bias & MDS_CREATE_VOLATILE) |
| flags |= MDS_OPEN_VOLATILE; |
| set_mrc_cr_flags(rec, flags); |
| rec->cr_bias = op_data->op_bias; |
| rec->cr_umask = current_umask(); |
| |
| mdc_pack_capa(req, &RMF_CAPA1, op_data->op_capa1); |
| |
| tmp = req_capsule_client_get(&req->rq_pill, &RMF_NAME); |
| LOGL0(op_data->op_name, op_data->op_namelen, tmp); |
| |
| if (data) { |
| tmp = req_capsule_client_get(&req->rq_pill, &RMF_EADATA); |
| memcpy(tmp, data, datalen); |
| } |
| } |
| |
| static __u64 mds_pack_open_flags(__u32 flags, __u32 mode) |
| { |
| __u64 cr_flags = (flags & (FMODE_READ | FMODE_WRITE | |
| MDS_OPEN_HAS_EA | MDS_OPEN_HAS_OBJS | |
| MDS_OPEN_OWNEROVERRIDE | MDS_OPEN_LOCK | |
| MDS_OPEN_BY_FID)); |
| if (flags & O_CREAT) |
| cr_flags |= MDS_OPEN_CREAT; |
| if (flags & O_EXCL) |
| cr_flags |= MDS_OPEN_EXCL; |
| if (flags & O_TRUNC) |
| cr_flags |= MDS_OPEN_TRUNC; |
| if (flags & O_APPEND) |
| cr_flags |= MDS_OPEN_APPEND; |
| if (flags & O_SYNC) |
| cr_flags |= MDS_OPEN_SYNC; |
| if (flags & O_DIRECTORY) |
| cr_flags |= MDS_OPEN_DIRECTORY; |
| #ifdef FMODE_EXEC |
| if (flags & FMODE_EXEC) |
| cr_flags |= MDS_FMODE_EXEC; |
| #endif |
| if (flags & O_LOV_DELAY_CREATE) |
| cr_flags |= MDS_OPEN_DELAY_CREATE; |
| |
| if (flags & O_NONBLOCK) |
| cr_flags |= MDS_OPEN_NORESTORE; |
| |
| return cr_flags; |
| } |
| |
| /* packing of MDS records */ |
| void mdc_open_pack(struct ptlrpc_request *req, struct md_op_data *op_data, |
| __u32 mode, __u64 rdev, __u32 flags, const void *lmm, |
| int lmmlen) |
| { |
| struct mdt_rec_create *rec; |
| char *tmp; |
| __u64 cr_flags; |
| |
| CLASSERT(sizeof(struct mdt_rec_reint) == sizeof(struct mdt_rec_create)); |
| rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT); |
| |
| /* XXX do something about time, uid, gid */ |
| rec->cr_opcode = REINT_OPEN; |
| rec->cr_fsuid = current_fsuid(); |
| rec->cr_fsgid = current_fsgid(); |
| rec->cr_cap = cfs_curproc_cap_pack(); |
| if (op_data != NULL) { |
| rec->cr_fid1 = op_data->op_fid1; |
| rec->cr_fid2 = op_data->op_fid2; |
| } |
| rec->cr_mode = mode; |
| cr_flags = mds_pack_open_flags(flags, mode); |
| rec->cr_rdev = rdev; |
| rec->cr_time = op_data->op_mod_time; |
| rec->cr_suppgid1 = op_data->op_suppgids[0]; |
| rec->cr_suppgid2 = op_data->op_suppgids[1]; |
| rec->cr_bias = op_data->op_bias; |
| rec->cr_umask = current_umask(); |
| |
| mdc_pack_capa(req, &RMF_CAPA1, op_data->op_capa1); |
| /* the next buffer is child capa, which is used for replay, |
| * will be packed from the data in reply message. */ |
| |
| if (op_data->op_name) { |
| tmp = req_capsule_client_get(&req->rq_pill, &RMF_NAME); |
| LOGL0(op_data->op_name, op_data->op_namelen, tmp); |
| if (op_data->op_bias & MDS_CREATE_VOLATILE) |
| cr_flags |= MDS_OPEN_VOLATILE; |
| } |
| |
| if (lmm) { |
| cr_flags |= MDS_OPEN_HAS_EA; |
| tmp = req_capsule_client_get(&req->rq_pill, &RMF_EADATA); |
| memcpy(tmp, lmm, lmmlen); |
| } |
| set_mrc_cr_flags(rec, cr_flags); |
| } |
| |
| static inline __u64 attr_pack(unsigned int ia_valid) { |
| __u64 sa_valid = 0; |
| |
| if (ia_valid & ATTR_MODE) |
| sa_valid |= MDS_ATTR_MODE; |
| if (ia_valid & ATTR_UID) |
| sa_valid |= MDS_ATTR_UID; |
| if (ia_valid & ATTR_GID) |
| sa_valid |= MDS_ATTR_GID; |
| if (ia_valid & ATTR_SIZE) |
| sa_valid |= MDS_ATTR_SIZE; |
| if (ia_valid & ATTR_ATIME) |
| sa_valid |= MDS_ATTR_ATIME; |
| if (ia_valid & ATTR_MTIME) |
| sa_valid |= MDS_ATTR_MTIME; |
| if (ia_valid & ATTR_CTIME) |
| sa_valid |= MDS_ATTR_CTIME; |
| if (ia_valid & ATTR_ATIME_SET) |
| sa_valid |= MDS_ATTR_ATIME_SET; |
| if (ia_valid & ATTR_MTIME_SET) |
| sa_valid |= MDS_ATTR_MTIME_SET; |
| if (ia_valid & ATTR_FORCE) |
| sa_valid |= MDS_ATTR_FORCE; |
| if (ia_valid & ATTR_ATTR_FLAG) |
| sa_valid |= MDS_ATTR_ATTR_FLAG; |
| if (ia_valid & ATTR_KILL_SUID) |
| sa_valid |= MDS_ATTR_KILL_SUID; |
| if (ia_valid & ATTR_KILL_SGID) |
| sa_valid |= MDS_ATTR_KILL_SGID; |
| if (ia_valid & ATTR_CTIME_SET) |
| sa_valid |= MDS_ATTR_CTIME_SET; |
| if (ia_valid & ATTR_FROM_OPEN) |
| sa_valid |= MDS_ATTR_FROM_OPEN; |
| if (ia_valid & ATTR_BLOCKS) |
| sa_valid |= MDS_ATTR_BLOCKS; |
| if (ia_valid & MDS_OPEN_OWNEROVERRIDE) |
| /* NFSD hack (see bug 5781) */ |
| sa_valid |= MDS_OPEN_OWNEROVERRIDE; |
| return sa_valid; |
| } |
| |
| static void mdc_setattr_pack_rec(struct mdt_rec_setattr *rec, |
| struct md_op_data *op_data) |
| { |
| rec->sa_opcode = REINT_SETATTR; |
| rec->sa_fsuid = current_fsuid(); |
| rec->sa_fsgid = current_fsgid(); |
| rec->sa_cap = cfs_curproc_cap_pack(); |
| rec->sa_suppgid = -1; |
| |
| rec->sa_fid = op_data->op_fid1; |
| rec->sa_valid = attr_pack(op_data->op_attr.ia_valid); |
| rec->sa_mode = op_data->op_attr.ia_mode; |
| rec->sa_uid = op_data->op_attr.ia_uid; |
| rec->sa_gid = op_data->op_attr.ia_gid; |
| rec->sa_size = op_data->op_attr.ia_size; |
| rec->sa_blocks = op_data->op_attr_blocks; |
| rec->sa_atime = LTIME_S(op_data->op_attr.ia_atime); |
| rec->sa_mtime = LTIME_S(op_data->op_attr.ia_mtime); |
| rec->sa_ctime = LTIME_S(op_data->op_attr.ia_ctime); |
| rec->sa_attr_flags = ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags; |
| if ((op_data->op_attr.ia_valid & ATTR_GID) && |
| current_is_in_group(op_data->op_attr.ia_gid)) |
| rec->sa_suppgid = op_data->op_attr.ia_gid; |
| else |
| rec->sa_suppgid = op_data->op_suppgids[0]; |
| |
| rec->sa_bias = op_data->op_bias; |
| } |
| |
| static void mdc_ioepoch_pack(struct mdt_ioepoch *epoch, |
| struct md_op_data *op_data) |
| { |
| memcpy(&epoch->handle, &op_data->op_handle, sizeof(epoch->handle)); |
| epoch->ioepoch = op_data->op_ioepoch; |
| epoch->flags = op_data->op_flags & MF_SOM_LOCAL_FLAGS; |
| } |
| |
| void mdc_setattr_pack(struct ptlrpc_request *req, struct md_op_data *op_data, |
| void *ea, int ealen, void *ea2, int ea2len) |
| { |
| struct mdt_rec_setattr *rec; |
| struct mdt_ioepoch *epoch; |
| struct lov_user_md *lum = NULL; |
| |
| CLASSERT(sizeof(struct mdt_rec_reint) ==sizeof(struct mdt_rec_setattr)); |
| rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT); |
| mdc_setattr_pack_rec(rec, op_data); |
| |
| mdc_pack_capa(req, &RMF_CAPA1, op_data->op_capa1); |
| |
| if (op_data->op_flags & (MF_SOM_CHANGE | MF_EPOCH_OPEN)) { |
| epoch = req_capsule_client_get(&req->rq_pill, &RMF_MDT_EPOCH); |
| mdc_ioepoch_pack(epoch, op_data); |
| } |
| |
| if (ealen == 0) |
| return; |
| |
| lum = req_capsule_client_get(&req->rq_pill, &RMF_EADATA); |
| if (ea == NULL) { /* Remove LOV EA */ |
| lum->lmm_magic = LOV_USER_MAGIC_V1; |
| lum->lmm_stripe_size = 0; |
| lum->lmm_stripe_count = 0; |
| lum->lmm_stripe_offset = (typeof(lum->lmm_stripe_offset))(-1); |
| } else { |
| memcpy(lum, ea, ealen); |
| } |
| |
| if (ea2len == 0) |
| return; |
| |
| memcpy(req_capsule_client_get(&req->rq_pill, &RMF_LOGCOOKIES), ea2, |
| ea2len); |
| } |
| |
| void mdc_unlink_pack(struct ptlrpc_request *req, struct md_op_data *op_data) |
| { |
| struct mdt_rec_unlink *rec; |
| char *tmp; |
| |
| CLASSERT(sizeof(struct mdt_rec_reint) == sizeof(struct mdt_rec_unlink)); |
| rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT); |
| LASSERT(rec != NULL); |
| |
| rec->ul_opcode = op_data->op_cli_flags & CLI_RM_ENTRY ? |
| REINT_RMENTRY : REINT_UNLINK; |
| rec->ul_fsuid = op_data->op_fsuid; |
| rec->ul_fsgid = op_data->op_fsgid; |
| rec->ul_cap = op_data->op_cap; |
| rec->ul_mode = op_data->op_mode; |
| rec->ul_suppgid1= op_data->op_suppgids[0]; |
| rec->ul_suppgid2= -1; |
| rec->ul_fid1 = op_data->op_fid1; |
| rec->ul_fid2 = op_data->op_fid2; |
| rec->ul_time = op_data->op_mod_time; |
| rec->ul_bias = op_data->op_bias; |
| |
| mdc_pack_capa(req, &RMF_CAPA1, op_data->op_capa1); |
| |
| tmp = req_capsule_client_get(&req->rq_pill, &RMF_NAME); |
| LASSERT(tmp != NULL); |
| LOGL0(op_data->op_name, op_data->op_namelen, tmp); |
| } |
| |
| void mdc_link_pack(struct ptlrpc_request *req, struct md_op_data *op_data) |
| { |
| struct mdt_rec_link *rec; |
| char *tmp; |
| |
| CLASSERT(sizeof(struct mdt_rec_reint) == sizeof(struct mdt_rec_link)); |
| rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT); |
| LASSERT (rec != NULL); |
| |
| rec->lk_opcode = REINT_LINK; |
| rec->lk_fsuid = op_data->op_fsuid;//current->fsuid; |
| rec->lk_fsgid = op_data->op_fsgid;//current->fsgid; |
| rec->lk_cap = op_data->op_cap;//current->cap_effective; |
| rec->lk_suppgid1 = op_data->op_suppgids[0]; |
| rec->lk_suppgid2 = op_data->op_suppgids[1]; |
| rec->lk_fid1 = op_data->op_fid1; |
| rec->lk_fid2 = op_data->op_fid2; |
| rec->lk_time = op_data->op_mod_time; |
| rec->lk_bias = op_data->op_bias; |
| |
| mdc_pack_capa(req, &RMF_CAPA1, op_data->op_capa1); |
| mdc_pack_capa(req, &RMF_CAPA2, op_data->op_capa2); |
| |
| tmp = req_capsule_client_get(&req->rq_pill, &RMF_NAME); |
| LOGL0(op_data->op_name, op_data->op_namelen, tmp); |
| } |
| |
| void mdc_rename_pack(struct ptlrpc_request *req, struct md_op_data *op_data, |
| const char *old, int oldlen, const char *new, int newlen) |
| { |
| struct mdt_rec_rename *rec; |
| char *tmp; |
| |
| CLASSERT(sizeof(struct mdt_rec_reint) == sizeof(struct mdt_rec_rename)); |
| rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT); |
| |
| /* XXX do something about time, uid, gid */ |
| rec->rn_opcode = REINT_RENAME; |
| rec->rn_fsuid = op_data->op_fsuid; |
| rec->rn_fsgid = op_data->op_fsgid; |
| rec->rn_cap = op_data->op_cap; |
| rec->rn_suppgid1 = op_data->op_suppgids[0]; |
| rec->rn_suppgid2 = op_data->op_suppgids[1]; |
| rec->rn_fid1 = op_data->op_fid1; |
| rec->rn_fid2 = op_data->op_fid2; |
| rec->rn_time = op_data->op_mod_time; |
| rec->rn_mode = op_data->op_mode; |
| rec->rn_bias = op_data->op_bias; |
| |
| mdc_pack_capa(req, &RMF_CAPA1, op_data->op_capa1); |
| mdc_pack_capa(req, &RMF_CAPA2, op_data->op_capa2); |
| |
| tmp = req_capsule_client_get(&req->rq_pill, &RMF_NAME); |
| LOGL0(old, oldlen, tmp); |
| |
| if (new) { |
| tmp = req_capsule_client_get(&req->rq_pill, &RMF_SYMTGT); |
| LOGL0(new, newlen, tmp); |
| } |
| } |
| |
| void mdc_getattr_pack(struct ptlrpc_request *req, __u64 valid, int flags, |
| struct md_op_data *op_data, int ea_size) |
| { |
| struct mdt_body *b = req_capsule_client_get(&req->rq_pill, |
| &RMF_MDT_BODY); |
| |
| b->valid = valid; |
| if (op_data->op_bias & MDS_CHECK_SPLIT) |
| b->valid |= OBD_MD_FLCKSPLIT; |
| if (op_data->op_bias & MDS_CROSS_REF) |
| b->valid |= OBD_MD_FLCROSSREF; |
| b->eadatasize = ea_size; |
| b->flags = flags; |
| __mdc_pack_body(b, op_data->op_suppgids[0]); |
| |
| b->fid1 = op_data->op_fid1; |
| b->fid2 = op_data->op_fid2; |
| b->valid |= OBD_MD_FLID; |
| |
| mdc_pack_capa(req, &RMF_CAPA1, op_data->op_capa1); |
| |
| if (op_data->op_name) { |
| char *tmp = req_capsule_client_get(&req->rq_pill, &RMF_NAME); |
| LOGL0(op_data->op_name, op_data->op_namelen, tmp); |
| |
| } |
| } |
| |
| void mdc_close_pack(struct ptlrpc_request *req, struct md_op_data *op_data) |
| { |
| struct mdt_ioepoch *epoch; |
| struct mdt_rec_setattr *rec; |
| |
| epoch = req_capsule_client_get(&req->rq_pill, &RMF_MDT_EPOCH); |
| rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT); |
| |
| mdc_setattr_pack_rec(rec, op_data); |
| mdc_pack_capa(req, &RMF_CAPA1, op_data->op_capa1); |
| mdc_ioepoch_pack(epoch, op_data); |
| } |
| |
| static int mdc_req_avail(struct client_obd *cli, struct mdc_cache_waiter *mcw) |
| { |
| int rc; |
| ENTRY; |
| client_obd_list_lock(&cli->cl_loi_list_lock); |
| rc = list_empty(&mcw->mcw_entry); |
| client_obd_list_unlock(&cli->cl_loi_list_lock); |
| RETURN(rc); |
| }; |
| |
| /* We record requests in flight in cli->cl_r_in_flight here. |
| * There is only one write rpc possible in mdc anyway. If this to change |
| * in the future - the code may need to be revisited. */ |
| int mdc_enter_request(struct client_obd *cli) |
| { |
| int rc = 0; |
| struct mdc_cache_waiter mcw; |
| struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL); |
| |
| client_obd_list_lock(&cli->cl_loi_list_lock); |
| if (cli->cl_r_in_flight >= cli->cl_max_rpcs_in_flight) { |
| list_add_tail(&mcw.mcw_entry, &cli->cl_cache_waiters); |
| init_waitqueue_head(&mcw.mcw_waitq); |
| client_obd_list_unlock(&cli->cl_loi_list_lock); |
| rc = l_wait_event(mcw.mcw_waitq, mdc_req_avail(cli, &mcw), &lwi); |
| if (rc) { |
| client_obd_list_lock(&cli->cl_loi_list_lock); |
| if (list_empty(&mcw.mcw_entry)) |
| cli->cl_r_in_flight--; |
| list_del_init(&mcw.mcw_entry); |
| client_obd_list_unlock(&cli->cl_loi_list_lock); |
| } |
| } else { |
| cli->cl_r_in_flight++; |
| client_obd_list_unlock(&cli->cl_loi_list_lock); |
| } |
| return rc; |
| } |
| |
| void mdc_exit_request(struct client_obd *cli) |
| { |
| struct list_head *l, *tmp; |
| struct mdc_cache_waiter *mcw; |
| |
| client_obd_list_lock(&cli->cl_loi_list_lock); |
| cli->cl_r_in_flight--; |
| list_for_each_safe(l, tmp, &cli->cl_cache_waiters) { |
| if (cli->cl_r_in_flight >= cli->cl_max_rpcs_in_flight) { |
| /* No free request slots anymore */ |
| break; |
| } |
| |
| mcw = list_entry(l, struct mdc_cache_waiter, mcw_entry); |
| list_del_init(&mcw->mcw_entry); |
| cli->cl_r_in_flight++; |
| wake_up(&mcw->mcw_waitq); |
| } |
| /* Empty waiting list? Decrease reqs in-flight number */ |
| |
| client_obd_list_unlock(&cli->cl_loi_list_lock); |
| } |