diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/lmv/lmv_internal.h')
| -rw-r--r-- | drivers/staging/lustre/lustre/lmv/lmv_internal.h | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/lmv/lmv_internal.h b/drivers/staging/lustre/lustre/lmv/lmv_internal.h new file mode 100644 index 000000000000..f75b0a987681 --- /dev/null +++ b/drivers/staging/lustre/lustre/lmv/lmv_internal.h @@ -0,0 +1,159 @@ +/* + * 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) 2004, 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. + */ + +#ifndef _LMV_INTERNAL_H_ +#define _LMV_INTERNAL_H_ + +#include <lustre/lustre_idl.h> +#include <obd.h> + +#define LMV_MAX_TGT_COUNT 128 + +#define lmv_init_lock(lmv) mutex_lock(&lmv->init_mutex); +#define lmv_init_unlock(lmv) mutex_unlock(&lmv->init_mutex); + +#define LL_IT2STR(it) \ + ((it) ? ldlm_it2str((it)->it_op) : "0") + +int lmv_check_connect(struct obd_device *obd); + +int lmv_intent_lock(struct obd_export *exp, struct md_op_data *op_data, + void *lmm, int lmmsize, struct lookup_intent *it, + int flags, struct ptlrpc_request **reqp, + ldlm_blocking_callback cb_blocking, + __u64 extra_lock_flags); + +int lmv_intent_lookup(struct obd_export *exp, struct md_op_data *op_data, + void *lmm, int lmmsize, struct lookup_intent *it, + int flags, struct ptlrpc_request **reqp, + ldlm_blocking_callback cb_blocking, + __u64 extra_lock_flags); + +int lmv_intent_open(struct obd_export *exp, struct md_op_data *op_data, + void *lmm, int lmmsize, struct lookup_intent *it, + int flags, struct ptlrpc_request **reqp, + ldlm_blocking_callback cb_blocking, + __u64 extra_lock_flags); + +int lmv_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *, + void *, int); +int lmv_fld_lookup(struct lmv_obd *lmv, const struct lu_fid *fid, + mdsno_t *mds); +int __lmv_fid_alloc(struct lmv_obd *lmv, struct lu_fid *fid, + mdsno_t mds); +int lmv_fid_alloc(struct obd_export *exp, struct lu_fid *fid, + struct md_op_data *op_data); + +static inline struct lmv_stripe_md *lmv_get_mea(struct ptlrpc_request *req) +{ + struct mdt_body *body; + struct lmv_stripe_md *mea; + + LASSERT(req != NULL); + + body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY); + + if (!body || !S_ISDIR(body->mode) || !body->eadatasize) + return NULL; + + mea = req_capsule_server_sized_get(&req->rq_pill, &RMF_MDT_MD, + body->eadatasize); + LASSERT(mea != NULL); + + if (mea->mea_count == 0) + return NULL; + if( mea->mea_magic != MEA_MAGIC_LAST_CHAR && + mea->mea_magic != MEA_MAGIC_ALL_CHARS && + mea->mea_magic != MEA_MAGIC_HASH_SEGMENT) + return NULL; + + return mea; +} + +static inline int lmv_get_easize(struct lmv_obd *lmv) +{ + return sizeof(struct lmv_stripe_md) + + lmv->desc.ld_tgt_count * + sizeof(struct lu_fid); +} + +static inline struct lmv_tgt_desc * +lmv_get_target(struct lmv_obd *lmv, mdsno_t mds) +{ + int count = lmv->desc.ld_tgt_count; + int i; + + for (i = 0; i < count; i++) { + if (lmv->tgts[i] == NULL) + continue; + + if (lmv->tgts[i]->ltd_idx == mds) + return lmv->tgts[i]; + } + + return ERR_PTR(-ENODEV); +} + +static inline struct lmv_tgt_desc * +lmv_find_target(struct lmv_obd *lmv, const struct lu_fid *fid) +{ + mdsno_t mds = 0; + int rc; + + if (lmv->desc.ld_tgt_count > 1) { + rc = lmv_fld_lookup(lmv, fid, &mds); + if (rc) + return ERR_PTR(rc); + } + + return lmv_get_target(lmv, mds); +} + +struct lmv_tgt_desc +*lmv_locate_mds(struct lmv_obd *lmv, struct md_op_data *op_data, + struct lu_fid *fid); +/* lproc_lmv.c */ +#ifdef LPROCFS +void lprocfs_lmv_init_vars(struct lprocfs_static_vars *lvars); +#else +static inline void lprocfs_lmv_init_vars(struct lprocfs_static_vars *lvars) +{ + memset(lvars, 0, sizeof(*lvars)); +} +#endif +extern struct file_operations lmv_proc_target_fops; + +#endif |