X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Fmdc%2Fmdc_lib.c;h=8f4cd9e1ac18fe607d247a0ade8ca6d214740ea4;hb=8f804c287bc97976f763a0c56ee6e3eab0c399a8;hp=5a9e60159019b9f23e9ca423e16a94403e500dc4;hpb=4b43b44e034f926e504ea818d2c91bd0346707c7;p=fs%2Flustre-release.git

diff --git a/lustre/mdc/mdc_lib.c b/lustre/mdc/mdc_lib.c
index 5a9e601..8f4cd9e 100644
--- a/lustre/mdc/mdc_lib.c
+++ b/lustre/mdc/mdc_lib.c
@@ -3,33 +3,32 @@
  *
  *  Copyright (c) 2003 Cluster File Systems, Inc.
  *
- *   This file is part of Lustre, http://www.lustre.org.
+ *   This file is part of the Lustre file system, http://www.lustre.org
+ *   Lustre is a trademark of Cluster File Systems, Inc.
  *
- *   Lustre is free software; you can redistribute it and/or
- *   modify it under the terms of version 2 of the GNU General Public
- *   License as published by the Free Software Foundation.
+ *   You may have signed or agreed to another license before downloading
+ *   this software.  If so, you are bound by the terms and conditions
+ *   of that agreement, and the following does not apply to you.  See the
+ *   LICENSE file included with this distribution for more information.
  *
- *   Lustre 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 for more details.
+ *   If you did not agree to a different license, then this copy of Lustre
+ *   is open source software; you can redistribute it and/or modify it
+ *   under the terms of version 2 of the GNU General Public License as
+ *   published by the Free Software Foundation.
  *
- *   You should have received a copy of the GNU General Public License
- *   along with Lustre; if not, write to the Free Software
- *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *   In either case, Lustre 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
+ *   license text for more details.
  */
 
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
-#define DEBUG_SUBSYSTEM S_MDS
+#define DEBUG_SUBSYSTEM S_MDC
 #ifndef __KERNEL__
 # include <fcntl.h>
 # include <liblustre.h>
 #endif
-#include <linux/lustre_idl.h>
-#include <linux/lustre_net.h>
-#include <linux/lustre_mds.h>
+#include <lustre/lustre_idl.h>
+#include <lustre_net.h>
 #include "mdc_internal.h"
 
 #ifndef __KERNEL__
@@ -39,145 +38,482 @@
 #endif
 #endif
 
-void mdc_readdir_pack(struct ptlrpc_request *req, int req_offset,
-                      __u64 offset, __u32 size, struct lustre_id *mdc_id)
+static void mdc_pack_body(struct mdt_body *b)
+{
+        LASSERT (b != NULL);
+
+        b->fsuid = current->fsuid;
+        b->fsgid = current->fsgid;
+        b->capability = current->cap_effective;
+}
+
+void mdc_pack_capa(struct ptlrpc_request *req, int offset, struct obd_capa *oc)
+{
+        struct lustre_capa *c;
+
+        if (oc == NULL) {
+                LASSERT(lustre_msg_buflen(req->rq_reqmsg, offset) == 0);
+                return;
+        }
+
+        c = lustre_msg_buf(req->rq_reqmsg, offset, sizeof(*c));
+        LASSERT(c != NULL);
+        capa_cpy(c, oc);
+        DEBUG_CAPA(D_SEC, c, "pack");
+}
+
+void mdc_is_subdir_pack(struct ptlrpc_request *req, int offset,
+                        const struct lu_fid *pfid,
+                        const struct lu_fid *cfid, int flags)
+{
+        struct mdt_body *b = lustre_msg_buf(req->rq_reqmsg, offset, sizeof(*b));
+
+        if (pfid)
+                b->fid1 = *pfid;
+        if (cfid)
+                b->fid2 = *cfid;
+        b->valid = OBD_MD_FLID;
+        b->flags = flags;
+}
+
+void mdc_pack_req_body(struct ptlrpc_request *req, int offset,
+                       __u64 valid, const struct lu_fid *fid,
+                       struct obd_capa *oc, int ea_size, int flags)
+{
+        struct mdt_body *b = lustre_msg_buf(req->rq_reqmsg, offset, sizeof(*b));
+
+        b->valid = valid;
+        b->eadatasize = ea_size;
+        b->flags = flags;
+        mdc_pack_body(b);
+        if (fid) {
+                b->fid1 = *fid;
+                mdc_pack_capa(req, offset + 1, oc);
+        }
+}
+
+void mdc_readdir_pack(struct ptlrpc_request *req, int offset, __u64 pgoff,
+                      __u32 size, const struct lu_fid *fid, struct obd_capa *oc)
 {
-        struct mds_body *b;
+        struct mdt_body *b;
 
-        b = lustre_msg_buf(req->rq_reqmsg, req_offset, sizeof (*b));
-        b->id1 = *mdc_id;
-        b->size = offset;                       /* !! */
+        b = lustre_msg_buf(req->rq_reqmsg, offset, sizeof(*b));
+        b->fid1 = *fid;
+        b->size = pgoff;                       /* !! */
+        b->suppgid = -1;
         b->nlink = size;                        /* !! */
+        mdc_pack_body(b);
+        mdc_pack_capa(req, offset + 1, oc);
+}
+
+/* packing of MDS records */
+void mdc_create_pack(struct ptlrpc_request *req, int offset,
+                     struct md_op_data *op_data, const void *data, int datalen,
+                     __u32 mode, __u32 uid, __u32 gid, __u32 cap_effective,
+                     __u64 rdev)
+{
+        struct mdt_rec_create *rec;
+        char *tmp;
+        
+        rec = lustre_msg_buf(req->rq_reqmsg, offset, sizeof(*rec));
+
+        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];
+        rec->cr_flags = op_data->op_flags & ~MF_SOM_LOCAL_FLAGS;
+        rec->cr_bias = op_data->op_bias;
+
+        mdc_pack_capa(req, offset + 1, op_data->op_capa1);
+
+        tmp = lustre_msg_buf(req->rq_reqmsg, offset + 2, op_data->op_namelen + 1);
+        LOGL0(op_data->op_name, op_data->op_namelen, tmp);
+
+        if (data) {
+                tmp = lustre_msg_buf(req->rq_reqmsg, offset + 3, datalen);
+                memcpy(tmp, data, datalen);
+        }
 }
 
 static __u32 mds_pack_open_flags(__u32 flags)
 {
-        return
-                (flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC |
-                          MDS_OPEN_DELAY_CREATE | MDS_OPEN_HAS_EA |
-                          MDS_OPEN_HAS_OBJS)) |
-                ((flags & O_CREAT) ? MDS_OPEN_CREAT : 0) |
-                ((flags & O_EXCL) ? MDS_OPEN_EXCL : 0) |
-                ((flags & O_TRUNC) ? MDS_OPEN_TRUNC : 0) |
-                ((flags & O_APPEND) ? MDS_OPEN_APPEND : 0) |
-                ((flags & O_SYNC) ? MDS_OPEN_SYNC : 0) |
-                ((flags & O_DIRECTORY) ? MDS_OPEN_DIRECTORY : 0) |
-                0;
+        __u32 cr_flags = (flags & (FMODE_READ | FMODE_WRITE |
+                                   MDS_OPEN_HAS_EA | MDS_OPEN_HAS_OBJS | 
+                                   MDS_OPEN_OWNEROVERRIDE | MDS_OPEN_LOCK));
+        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;
+        if (flags & O_JOIN_FILE)
+                cr_flags |= MDS_OPEN_JOIN_FILE;
+#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;
+
+        return cr_flags;
 }
 
 /* packing of MDS records */
-void mdc_open_pack(struct lustre_msg *msg, int offset,
-                   struct mdc_op_data *op_data, __u32 mode,
-                   __u64 rdev, __u32 flags, const void *lmm,
-                   int lmmlen)
+void mdc_join_pack(struct ptlrpc_request *req, int offset,
+                   struct md_op_data *op_data, __u64 head_size)
 {
-        struct mds_rec_create *rec;
+        struct mdt_rec_join *rec;
+
+        rec = lustre_msg_buf(req->rq_reqmsg, offset, sizeof(*rec));
+        LASSERT(rec != NULL);
+        rec->jr_fid = op_data->op_fid2;
+        rec->jr_headsize = head_size;
+}
+
+void mdc_open_pack(struct ptlrpc_request *req, int offset,
+                   struct md_op_data *op_data, __u32 mode, __u64 rdev,
+                   __u32 flags, const void *lmm, int lmmlen)
+{
+        struct mdt_rec_create *rec;
         char *tmp;
-        
-        rec = lustre_msg_buf(msg, offset, sizeof (*rec));
+        rec = lustre_msg_buf(req->rq_reqmsg, offset, sizeof (*rec));
 
         /* XXX do something about time, uid, gid */
         rec->cr_opcode = REINT_OPEN;
-        if (op_data != NULL)
-                rec->cr_id = op_data->id1;
-        memset(&rec->cr_replayid, 0, sizeof(rec->cr_replayid));
-        rec->cr_flags = mds_pack_open_flags(flags);
-        rec->cr_time = op_data->mod_time;
+        rec->cr_fsuid = current->fsuid;
+        rec->cr_fsgid = current->fsgid;
+        rec->cr_cap = current->cap_effective;
+        if (op_data != NULL) {
+                rec->cr_fid1 = op_data->op_fid1;
+                rec->cr_fid2 = op_data->op_fid2;
+        }
         rec->cr_mode = mode;
+        rec->cr_flags = mds_pack_open_flags(flags);
+        rec->cr_time = op_data->op_mod_time;
         rec->cr_rdev = rdev;
+        rec->cr_suppgid1 = op_data->op_suppgids[0];
+        rec->cr_suppgid2 = op_data->op_suppgids[1];
+        rec->cr_bias = op_data->op_bias;
+
+        mdc_pack_capa(req, offset + 1, 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->name) {
-                tmp = lustre_msg_buf(msg, offset + 1,
-                                     op_data->namelen + 1);
-                LOGL0(op_data->name, op_data->namelen, tmp);
+        if (op_data->op_name) {
+                tmp = lustre_msg_buf(req->rq_reqmsg, offset + 3,
+                                     op_data->op_namelen + 1);
+                LOGL0(op_data->op_name, op_data->op_namelen, tmp);
         }
 
         if (lmm) {
                 rec->cr_flags |= MDS_OPEN_HAS_EA;
-                tmp = lustre_msg_buf(msg, offset + 2, lmmlen);
+#ifndef __KERNEL__
+                /*XXX a hack for liblustre to set EA (LL_IOC_LOV_SETSTRIPE) */
+                rec->cr_fid2 = op_data->op_fid2;
+#endif
+                tmp = lustre_msg_buf(req->rq_reqmsg, offset + 4, lmmlen);
                 memcpy (tmp, lmm, lmmlen);
         }
 }
 
-void mdc_getattr_pack(struct lustre_msg *msg, int offset,
-                      __u64 valid, int flags, struct mdc_op_data *data)
+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)
 {
-        struct mds_body *b;
-        b = lustre_msg_buf(msg, offset, sizeof (*b));
+        rec->sa_opcode = REINT_SETATTR;
+        rec->sa_fsuid = current->fsuid;
+        rec->sa_fsgid = current->fsgid;
+        rec->sa_cap = current->cap_effective;
+        rec->sa_suppgid = -1;
 
-        b->valid = valid;
-        b->flags = flags;
+        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) &&
+            in_group_p(op_data->op_attr.ia_gid))
+                rec->sa_suppgid = op_data->op_attr.ia_gid;
+        else
+                rec->sa_suppgid = op_data->op_suppgids[0];
+}
 
-        b->id1 = data->id1;
-        b->id2 = data->id2;
-        if (data->name) {
-                char *tmp;
-                tmp = lustre_msg_buf(msg, offset + 1,
-                                     data->namelen + 1);
-                LOGL0(data->name, data->namelen, tmp);
-        }
+static void mdc_epoch_pack(struct mdt_epoch *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_close_pack(struct ptlrpc_request *req, int offset, struct obdo *oa,
-                    __u64 valid, struct obd_client_handle *och)
+void mdc_setattr_pack(struct ptlrpc_request *req, int offset,
+                      struct md_op_data *op_data, void *ea,
+                      int ealen, void *ea2, int ea2len)
 {
-        struct mds_body *body;
+        struct mdt_rec_setattr *rec;
+        struct mdt_epoch *epoch;
+        
+        rec = lustre_msg_buf(req->rq_reqmsg, offset, sizeof (*rec));        
+        mdc_setattr_pack_rec(rec, op_data);
 
-        body = lustre_msg_buf(req->rq_reqmsg, offset, sizeof(*body));
-        mdc_pack_id(&body->id1, oa->o_id, 0, oa->o_mode, 0, 0);
+        mdc_pack_capa(req, offset + 1, op_data->op_capa1);
 
-        memcpy(&body->handle, &och->och_fh, sizeof(body->handle));
-        if (oa->o_valid & OBD_MD_FLATIME) {
-                body->atime = oa->o_atime;
-                body->valid |= OBD_MD_FLATIME;
+        if (op_data->op_flags & (MF_SOM_CHANGE | MF_EPOCH_OPEN)) {
+                epoch = lustre_msg_buf(req->rq_reqmsg, offset + 2,
+                                        sizeof(*epoch));
+                mdc_epoch_pack(epoch, op_data);
         }
-        if (oa->o_valid & OBD_MD_FLMTIME) {
-                body->mtime = oa->o_mtime;
-                body->valid |= OBD_MD_FLMTIME;
-        }
-        if (oa->o_valid & OBD_MD_FLCTIME) {
-                body->ctime = oa->o_ctime;
-                body->valid |= OBD_MD_FLCTIME;
-        }
-        if (oa->o_valid & OBD_MD_FLSIZE) {
-                body->size = oa->o_size;
-                body->valid |= OBD_MD_FLSIZE;
-        }
-        if (oa->o_valid & OBD_MD_FLBLOCKS) {
-                body->blocks = oa->o_blocks;
-                body->valid |= OBD_MD_FLBLOCKS;
-        }
-        if (oa->o_valid & OBD_MD_FLFLAGS) {
-                body->flags = oa->o_flags;
-                body->valid |= OBD_MD_FLFLAGS;
+
+        if (ealen == 0)
+                return;
+
+        memcpy(lustre_msg_buf(req->rq_reqmsg, offset + 3, ealen), ea, ealen);
+
+        if (ea2len == 0)
+                return;
+
+        memcpy(lustre_msg_buf(req->rq_reqmsg, offset + 4, ea2len), ea2, ea2len);
+}
+
+void mdc_unlink_pack(struct ptlrpc_request *req, int offset,
+                     struct md_op_data *op_data)
+{
+        struct mdt_rec_unlink *rec;
+        char *tmp;
+
+        rec = lustre_msg_buf(req->rq_reqmsg, offset, sizeof (*rec));
+        LASSERT (rec != NULL);
+
+        rec->ul_opcode = REINT_UNLINK;
+        rec->ul_fsuid = op_data->op_fsuid;//current->fsuid;
+        rec->ul_fsgid = op_data->op_fsgid;//current->fsgid;
+        rec->ul_cap = op_data->op_cap;//current->cap_effective;
+        rec->ul_mode = op_data->op_mode;
+        rec->ul_suppgid = op_data->op_suppgids[0];
+        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, offset + 1, op_data->op_capa1);
+
+        tmp = lustre_msg_buf(req->rq_reqmsg, offset + 2, op_data->op_namelen + 1);
+        LASSERT(tmp != NULL);
+        LOGL0(op_data->op_name, op_data->op_namelen, tmp);
+}
+
+void mdc_link_pack(struct ptlrpc_request *req, int offset,
+                   struct md_op_data *op_data)
+{
+        struct mdt_rec_link *rec;
+        char *tmp;
+
+        rec = lustre_msg_buf(req->rq_reqmsg, offset, sizeof (*rec));
+
+        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, offset + 1, op_data->op_capa1);
+        mdc_pack_capa(req, offset + 2, op_data->op_capa2);
+
+        tmp = lustre_msg_buf(req->rq_reqmsg, offset + 3, op_data->op_namelen + 1);
+        LOGL0(op_data->op_name, op_data->op_namelen, tmp);
+}
+
+void mdc_rename_pack(struct ptlrpc_request *req, int offset,
+                     struct md_op_data *op_data,
+                     const char *old, int oldlen, const char *new, int newlen)
+{
+        struct mdt_rec_rename *rec;
+        char *tmp;
+
+        rec = lustre_msg_buf(req->rq_reqmsg, offset, sizeof (*rec));
+
+        /* XXX do something about time, uid, gid */
+        rec->rn_opcode = REINT_RENAME;
+        rec->rn_fsuid = op_data->op_fsuid;//current->fsuid;
+        rec->rn_fsgid = op_data->op_fsgid;//current->fsgid;
+        rec->rn_cap = op_data->op_cap;//current->cap_effective;
+        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, offset + 1, op_data->op_capa1);
+        mdc_pack_capa(req, offset + 2, op_data->op_capa2);
+
+        tmp = lustre_msg_buf(req->rq_reqmsg, offset + 3, oldlen + 1);
+        LOGL0(old, oldlen, tmp);
+
+        if (new) {
+                tmp = lustre_msg_buf(req->rq_reqmsg, offset + 4, newlen + 1);
+                LOGL0(new, newlen, tmp);
         }
-        if (oa->o_valid & OBD_MD_FLEPOCH) {
-                body->io_epoch = oa->o_easize;
-                body->valid |= OBD_MD_FLEPOCH;
+}
+
+void mdc_getattr_pack(struct ptlrpc_request *req, int offset, __u64 valid,
+                      int flags, struct md_op_data *op_data)
+{
+        struct mdt_body *b;
+        b = lustre_msg_buf(req->rq_reqmsg, offset, sizeof (*b));
+
+        b->fsuid = current->fsuid;
+        b->fsgid = current->fsgid;
+        b->capability = current->cap_effective;
+        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->flags = flags | MDS_BFLAG_EXT_FLAGS;
+        b->suppgid = op_data->op_suppgids[0];
+
+        b->fid1 = op_data->op_fid1;
+        b->fid2 = op_data->op_fid2;
+
+        mdc_pack_capa(req, offset + 1, op_data->op_capa1);
+
+        if (op_data->op_name) {
+                char *tmp;
+                tmp = lustre_msg_buf(req->rq_reqmsg, offset + 2,
+                                     op_data->op_namelen + 1);
+                LOGL0(op_data->op_name, op_data->op_namelen, tmp);
         }
 }
 
-/* 
- * these methods needed for saying higher levels that MDC does not pack/unpack
- * any EAs. This is needed to have real abstraction and do not try to recognize
- * what OBD type is to avoid calling these methods on it, as they may not be
- * implemented.
- *
- * Sometimes pack/unpack calls happen to MDC too. This is for instance default
- * striping info for directories and our goal here is to skip them with no
- * errors or any complains.
- */
-int mdc_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
-               struct lov_stripe_md *lsm)
+void mdc_close_pack(struct ptlrpc_request *req, int offset,
+                    struct md_op_data *op_data)
 {
-        ENTRY;
-        RETURN(0);
+        struct mdt_epoch *epoch;
+        struct mdt_rec_setattr *rec;
+
+        epoch = lustre_msg_buf(req->rq_reqmsg, offset, sizeof(*epoch));
+        rec = lustre_msg_buf(req->rq_reqmsg, offset + 1, sizeof(*rec));
+
+        mdc_setattr_pack_rec(rec, op_data);
+        mdc_pack_capa(req, offset + 2, op_data->op_capa1);
+        mdc_epoch_pack(epoch, op_data);
 }
 
-int mdc_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
-                 struct lov_mds_md *lmm, int lmm_size)
+static int mdc_req_avail(struct client_obd *cli, struct mdc_cache_waiter *mcw)
 {
+        int rc;
         ENTRY;
-        RETURN(0);
+        spin_lock(&cli->cl_loi_list_lock);
+        rc = list_empty(&mcw->mcw_entry);
+        spin_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. */
+void mdc_enter_request(struct client_obd *cli)
+{
+        struct mdc_cache_waiter mcw;
+        struct l_wait_info lwi = { 0 };
+
+        spin_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);
+                spin_unlock(&cli->cl_loi_list_lock);
+                l_wait_event(mcw.mcw_waitq, mdc_req_avail(cli, &mcw), &lwi);
+        } else {
+                cli->cl_r_in_flight++;
+                spin_unlock(&cli->cl_loi_list_lock);
+        }
 }
 
+void mdc_exit_request(struct client_obd *cli)
+{
+        struct list_head *l, *tmp;
+        struct mdc_cache_waiter *mcw;
+
+        spin_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 */
+        
+        spin_unlock(&cli->cl_loi_list_lock);
+}