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[fs/lustre-release.git] / lustre / llite / file.c
index 40c8749..37675d2 100644 (file)
 #define DEBUG_SUBSYSTEM S_LLITE
 #include <lustre_dlm.h>
 #include <lustre_lite.h>
+#include <lustre_mdc.h>
 #include <linux/pagemap.h>
 #include <linux/file.h>
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
-#include <linux/lustre_compat25.h>
-#endif
 #include "llite_internal.h"
 
 /* also used by llite/special.c:ll_special_open() */
@@ -37,67 +35,112 @@ struct ll_file_data *ll_file_data_get(void)
 {
         struct ll_file_data *fd;
 
-        OBD_SLAB_ALLOC(fd, ll_file_data_slab, SLAB_KERNEL, sizeof *fd);
+        OBD_SLAB_ALLOC_PTR(fd, ll_file_data_slab);
         return fd;
 }
 
 static void ll_file_data_put(struct ll_file_data *fd)
 {
         if (fd != NULL)
-                OBD_SLAB_FREE(fd, ll_file_data_slab, sizeof *fd);
+                OBD_SLAB_FREE_PTR(fd, ll_file_data_slab);
+}
+
+void ll_pack_inode2opdata(struct inode *inode, struct md_op_data *op_data,
+                          struct lustre_handle *fh)
+{
+        op_data->op_fid1 = ll_i2info(inode)->lli_fid;
+        op_data->op_attr.ia_mode = inode->i_mode;
+        op_data->op_attr.ia_atime = inode->i_atime;
+        op_data->op_attr.ia_mtime = inode->i_mtime;
+        op_data->op_attr.ia_ctime = inode->i_ctime;
+        op_data->op_attr.ia_size = i_size_read(inode);
+        op_data->op_attr_blocks = inode->i_blocks;
+        ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags = inode->i_flags;
+        op_data->op_ioepoch = ll_i2info(inode)->lli_ioepoch;
+        memcpy(&op_data->op_handle, fh, sizeof(op_data->op_handle));
+        op_data->op_capa1 = ll_mdscapa_get(inode);
 }
 
-static int ll_close_inode_openhandle(struct inode *inode,
+static void ll_prepare_close(struct inode *inode, struct md_op_data *op_data,
+                             struct obd_client_handle *och)
+{
+        ENTRY;
+
+        op_data->op_attr.ia_valid = ATTR_MODE | ATTR_ATIME_SET |
+                                 ATTR_MTIME_SET | ATTR_CTIME_SET;
+
+        if (!(och->och_flags & FMODE_WRITE))
+                goto out;
+
+        if (!(ll_i2mdexp(inode)->exp_connect_flags & OBD_CONNECT_SOM) ||
+            !S_ISREG(inode->i_mode))
+                op_data->op_attr.ia_valid |= ATTR_SIZE | ATTR_BLOCKS;
+        else
+                ll_epoch_close(inode, op_data, &och, 0);
+
+out:
+        ll_pack_inode2opdata(inode, op_data, &och->och_fh);
+        EXIT;
+}
+
+static int ll_close_inode_openhandle(struct obd_export *md_exp,
+                                     struct inode *inode,
                                      struct obd_client_handle *och)
 {
+        struct obd_export *exp = ll_i2mdexp(inode);
+        struct md_op_data *op_data;
         struct ptlrpc_request *req = NULL;
-        struct obd_device *obd;
-        struct obdo *oa;
-        int rc;
+        struct obd_device *obd = class_exp2obd(exp);
+        int epoch_close = 1;
+        int seq_end = 0, rc;
         ENTRY;
 
-        obd = class_exp2obd(ll_i2mdcexp(inode));
         if (obd == NULL) {
+                /*
+                 * XXX: in case of LMV, is this correct to access
+                 * ->exp_handle?
+                 */
                 CERROR("Invalid MDC connection handle "LPX64"\n",
-                       ll_i2mdcexp(inode)->exp_handle.h_cookie);
+                       ll_i2mdexp(inode)->exp_handle.h_cookie);
                 GOTO(out, rc = 0);
         }
 
         /*
          * here we check if this is forced umount. If so this is called on
-         * canceling "open lock" and we do not call mdc_close() in this case, as
+         * canceling "open lock" and we do not call md_close() in this case, as
          * it will not be successful, as import is already deactivated.
          */
-        if (obd->obd_no_recov)
+        if (obd->obd_force)
                 GOTO(out, rc = 0);
 
-        oa = obdo_alloc();
-        if (!oa)
-                RETURN(-ENOMEM); // XXX We leak openhandle and request here.
-
-        oa->o_id = inode->i_ino;
-        oa->o_valid = OBD_MD_FLID;
-        obdo_from_inode(oa, inode, OBD_MD_FLTYPE | OBD_MD_FLMODE |
-                                   OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
-                                   OBD_MD_FLATIME | OBD_MD_FLMTIME |
-                                   OBD_MD_FLCTIME);
-        if (0 /* ll_is_inode_dirty(inode) */) {
-                oa->o_flags = MDS_BFLAG_UNCOMMITTED_WRITES;
-                oa->o_valid |= OBD_MD_FLFLAGS;
-        }
-
-        rc = mdc_close(ll_i2mdcexp(inode), oa, och, &req);
-        if (rc == EAGAIN) {
-                /* We are the last writer, so the MDS has instructed us to get
-                 * the file size and any write cookies, then close again. */
-                //ll_queue_done_writing(inode);
-                rc = 0;
+        OBD_ALLOC_PTR(op_data);
+        if (op_data == NULL)
+                GOTO(out, rc = -ENOMEM); // XXX We leak openhandle and request here.
+
+        ll_prepare_close(inode, op_data, och);
+        epoch_close = (op_data->op_flags & MF_EPOCH_CLOSE);
+        rc = md_close(md_exp, op_data, och->och_mod, &req);
+        if (rc != -EAGAIN)
+                seq_end = 1;
+
+        if (rc == -EAGAIN) {
+                /* This close must have the epoch closed. */
+                LASSERT(exp->exp_connect_flags & OBD_CONNECT_SOM);
+                LASSERT(epoch_close);
+                /* MDS has instructed us to obtain Size-on-MDS attribute from
+                 * OSTs and send setattr to back to MDS. */
+                rc = ll_sizeonmds_update(inode, och->och_mod,
+                                         &och->och_fh, op_data->op_ioepoch);
+                if (rc) {
+                        CERROR("inode %lu mdc Size-on-MDS update failed: "
+                               "rc = %d\n", inode->i_ino, rc);
+                        rc = 0;
+                }
         } else if (rc) {
                 CERROR("inode %lu mdc close failed: rc = %d\n",
                        inode->i_ino, rc);
         }
-
-        obdo_free(oa);
+        ll_finish_md_op_data(op_data);
 
         if (rc == 0) {
                 rc = ll_objects_destroy(req, inode);
@@ -106,22 +149,32 @@ static int ll_close_inode_openhandle(struct inode *inode,
                                inode->i_ino, rc);
         }
 
-        ptlrpc_req_finished(req); /* This is close request */
         EXIT;
 out:
-        mdc_clear_open_replay_data(och);
-
+      
+        if ((exp->exp_connect_flags & OBD_CONNECT_SOM) && !epoch_close &&
+            S_ISREG(inode->i_mode) && (och->och_flags & FMODE_WRITE)) {
+                ll_queue_done_writing(inode, LLIF_DONE_WRITING);
+        } else {
+                if (seq_end)
+                        ptlrpc_close_replay_seq(req);
+                md_clear_open_replay_data(md_exp, och);
+                /* Free @och if it is not waiting for DONE_WRITING. */
+                och->och_fh.cookie = DEAD_HANDLE_MAGIC;
+                OBD_FREE_PTR(och);
+        }
+        if (req) /* This is close request */
+                ptlrpc_req_finished(req);
         return rc;
 }
 
-int ll_mdc_real_close(struct inode *inode, int flags)
+int ll_md_real_close(struct inode *inode, int flags)
 {
         struct ll_inode_info *lli = ll_i2info(inode);
-        int rc = 0;
         struct obd_client_handle **och_p;
         struct obd_client_handle *och;
         __u64 *och_usecount;
-
+        int rc = 0;
         ENTRY;
 
         if (flags & FMODE_WRITE) {
@@ -130,7 +183,7 @@ int ll_mdc_real_close(struct inode *inode, int flags)
         } else if (flags & FMODE_EXEC) {
                 och_p = &lli->lli_mds_exec_och;
                 och_usecount = &lli->lli_open_fd_exec_count;
-         } else {
+        } else {
                 LASSERT(flags & FMODE_READ);
                 och_p = &lli->lli_mds_read_och;
                 och_usecount = &lli->lli_open_fd_read_count;
@@ -148,16 +201,15 @@ int ll_mdc_real_close(struct inode *inode, int flags)
 
         if (och) { /* There might be a race and somebody have freed this och
                       already */
-                rc = ll_close_inode_openhandle(inode, och);
-                och->och_fh.cookie = DEAD_HANDLE_MAGIC;
-                OBD_FREE(och, sizeof *och);
+                rc = ll_close_inode_openhandle(ll_i2sbi(inode)->ll_md_exp,
+                                               inode, och);
         }
 
         RETURN(rc);
 }
 
-int ll_mdc_close(struct obd_export *mdc_exp, struct inode *inode,
-                        struct file *file)
+int ll_md_close(struct obd_export *md_exp, struct inode *inode,
+                struct file *file)
 {
         struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
         struct ll_inode_info *lli = ll_i2info(inode);
@@ -179,8 +231,6 @@ int ll_mdc_close(struct obd_export *mdc_exp, struct inode *inode,
                 int flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_TEST_LOCK;
                 struct lustre_handle lockh;
                 struct inode *inode = file->f_dentry->d_inode;
-                struct ldlm_res_id file_res_id = {.name={inode->i_ino,
-                                                         inode->i_generation}};
                 ldlm_policy_data_t policy = {.l_inodebits={MDS_INODELOCK_OPEN}};
 
                 down(&lli->lli_och_sem);
@@ -199,11 +249,11 @@ int ll_mdc_close(struct obd_export *mdc_exp, struct inode *inode,
                 }
                 up(&lli->lli_och_sem);
 
-                if (!ldlm_lock_match(mdc_exp->exp_obd->obd_namespace, flags,
-                                     &file_res_id, LDLM_IBITS, &policy,lockmode,
-                                     &lockh)) {
-                        rc = ll_mdc_real_close(file->f_dentry->d_inode,
-                                                fd->fd_omode);
+                if (!md_lock_match(md_exp, flags, ll_inode2fid(inode),
+                                   LDLM_IBITS, &policy, lockmode,
+                                   &lockh)) {
+                        rc = ll_md_real_close(file->f_dentry->d_inode,
+                                              fd->fd_omode);
                 }
         } else {
                 CERROR("Releasing a file %p with negative dentry %p. Name %s",
@@ -212,6 +262,7 @@ int ll_mdc_close(struct obd_export *mdc_exp, struct inode *inode,
 
         LUSTRE_FPRIVATE(file) = NULL;
         ll_file_data_put(fd);
+        ll_capa_close(inode);
 
         RETURN(rc);
 }
@@ -234,22 +285,27 @@ int ll_file_release(struct inode *inode, struct file *file)
         ENTRY;
         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
                inode->i_generation, inode);
-        ll_vfs_ops_tally(sbi, VFS_OPS_RELEASE);
 
         /* don't do anything for / */
         if (inode->i_sb->s_root == file->f_dentry)
                 RETURN(0);
 
-        lprocfs_counter_incr(sbi->ll_stats, LPROC_LL_RELEASE);
-
+        ll_stats_ops_tally(sbi, LPROC_LL_RELEASE, 1);
         fd = LUSTRE_FPRIVATE(file);
         LASSERT(fd != NULL);
 
+        /* don't do anything for / */
+        if (inode->i_sb->s_root == file->f_dentry) {
+                LUSTRE_FPRIVATE(file) = NULL;
+                ll_file_data_put(fd);
+                RETURN(0);
+        }
+        
         if (lsm)
                 lov_test_and_clear_async_rc(lsm);
         lli->lli_async_rc = 0;
 
-        rc = ll_mdc_close(sbi->ll_mdc_exp, inode, file);
+        rc = ll_md_close(sbi->ll_md_exp, inode, file);
         RETURN(rc);
 }
 
@@ -257,19 +313,16 @@ static int ll_intent_file_open(struct file *file, void *lmm,
                                int lmmsize, struct lookup_intent *itp)
 {
         struct ll_sb_info *sbi = ll_i2sbi(file->f_dentry->d_inode);
-        struct mdc_op_data data;
         struct dentry *parent = file->f_dentry->d_parent;
         const char *name = file->f_dentry->d_name.name;
         const int len = file->f_dentry->d_name.len;
-        struct inode *inode = file->f_dentry->d_inode;
+        struct md_op_data *op_data;
         struct ptlrpc_request *req;
         int rc;
 
         if (!parent)
                 RETURN(-ENOENT);
 
-        ll_prepare_mdc_op_data(&data, parent->d_inode, inode, name, len, O_RDWR);
-
         /* Usually we come here only for NFSD, and we want open lock.
            But we can also get here with pre 2.6.15 patchless kernels, and in
            that case that lock is also ok */
@@ -282,29 +335,39 @@ static int ll_intent_file_open(struct file *file, void *lmm,
         if (!lmm && !lmmsize)
                 itp->it_flags |= MDS_OPEN_LOCK;
 
-        rc = mdc_intent_lock(sbi->ll_mdc_exp, &data, lmm, lmmsize, itp,
-                              0 /*unused */, &req, ll_mdc_blocking_ast, 0);
+        op_data  = ll_prep_md_op_data(NULL, parent->d_inode,
+                                      file->f_dentry->d_inode, name, len,
+                                      O_RDWR, LUSTRE_OPC_ANY, NULL);
+        if (IS_ERR(op_data))
+                RETURN(PTR_ERR(op_data));
+
+        rc = md_intent_lock(sbi->ll_md_exp, op_data, lmm, lmmsize, itp,
+                            0 /*unused */, &req, ll_md_blocking_ast, 0);
+        ll_finish_md_op_data(op_data);
         if (rc == -ESTALE) {
                 /* reason for keep own exit path - don`t flood log
                 * with messages with -ESTALE errors.
                 */
-                if (!it_disposition(itp, DISP_OPEN_OPEN))
+                if (!it_disposition(itp, DISP_OPEN_OPEN) || 
+                     it_open_error(DISP_OPEN_OPEN, itp))
                         GOTO(out, rc);
                 ll_release_openhandle(file->f_dentry, itp);
                 GOTO(out_stale, rc);
         }
 
-        if (rc != 0) {
-               CERROR("lock enqueue: err: %d\n", rc);
-               GOTO(out, rc);
+        if (rc != 0 || it_open_error(DISP_OPEN_OPEN, itp)) {
+                rc = rc ? rc : it_open_error(DISP_OPEN_OPEN, itp);
+                CDEBUG(D_VFSTRACE, "lock enqueue: err: %d\n", rc);
+                GOTO(out, rc);
         }
 
         if (itp->d.lustre.it_lock_mode)
-                mdc_set_lock_data(&itp->d.lustre.it_lock_handle,
-                                  inode);
+                md_set_lock_data(sbi->ll_md_exp,
+                                 &itp->d.lustre.it_lock_handle, 
+                                 file->f_dentry->d_inode);
 
-        rc = ll_prep_inode(sbi->ll_osc_exp, &file->f_dentry->d_inode,
-                           req, DLM_REPLY_REC_OFF, NULL);
+        rc = ll_prep_inode(&file->f_dentry->d_inode, req, DLM_REPLY_REC_OFF,
+                           NULL);
 out:
         ptlrpc_req_finished(itp->d.lustre.it_data);
 
@@ -315,41 +378,61 @@ out_stale:
         RETURN(rc);
 }
 
-
-static void ll_och_fill(struct ll_inode_info *lli, struct lookup_intent *it,
-                        struct obd_client_handle *och)
+static int ll_och_fill(struct obd_export *md_exp, struct ll_inode_info *lli,
+                       struct lookup_intent *it, struct obd_client_handle *och)
 {
         struct ptlrpc_request *req = it->d.lustre.it_data;
-        struct mds_body *body;
+        struct mdt_body *body;
 
         LASSERT(och);
 
         body = lustre_msg_buf(req->rq_repmsg, DLM_REPLY_REC_OFF, sizeof(*body));
-        LASSERT(body != NULL);                  /* reply already checked out */
-        LASSERT_REPSWABBED(req, DLM_REPLY_REC_OFF); /* and swabbed in mdc_enqueue */
+        LASSERT(body != NULL);                      /* reply already checked out */
+        LASSERT_REPSWABBED(req, DLM_REPLY_REC_OFF); /* and swabbed in md_enqueue */
 
         memcpy(&och->och_fh, &body->handle, sizeof(body->handle));
         och->och_magic = OBD_CLIENT_HANDLE_MAGIC;
-        lli->lli_io_epoch = body->io_epoch;
+        och->och_fid = lli->lli_fid;
+        och->och_flags = it->it_flags;
+        lli->lli_ioepoch = body->ioepoch;
 
-        mdc_set_open_replay_data(och, it->d.lustre.it_data);
+        return md_set_open_replay_data(md_exp, och, req);
 }
 
 int ll_local_open(struct file *file, struct lookup_intent *it,
                   struct ll_file_data *fd, struct obd_client_handle *och)
 {
+        struct inode *inode = file->f_dentry->d_inode;
+        struct ll_inode_info *lli = ll_i2info(inode);
         ENTRY;
 
         LASSERT(!LUSTRE_FPRIVATE(file));
 
         LASSERT(fd != NULL);
 
-        if (och)
-                ll_och_fill(ll_i2info(file->f_dentry->d_inode), it, och);
+        if (och) {
+                struct ptlrpc_request *req = it->d.lustre.it_data;
+                struct mdt_body *body;
+                int rc;
+
+                rc = ll_och_fill(ll_i2sbi(inode)->ll_md_exp, lli, it, och);
+                if (rc)
+                        RETURN(rc);
+
+                body = lustre_msg_buf(req->rq_repmsg,
+                                      DLM_REPLY_REC_OFF, sizeof(*body));
+
+                if ((it->it_flags & FMODE_WRITE) &&
+                    (body->valid & OBD_MD_FLSIZE))
+                {
+                        CDEBUG(D_INODE, "Epoch "LPU64" opened on "DFID"\n",
+                               lli->lli_ioepoch, PFID(&lli->lli_fid));
+                }
+        }
+
         LUSTRE_FPRIVATE(file) = fd;
-        ll_readahead_init(file->f_dentry->d_inode, &fd->fd_ras);
+        ll_readahead_init(inode, &fd->fd_ras);
         fd->fd_omode = it->it_flags;
-
         RETURN(0);
 }
 
@@ -360,7 +443,7 @@ int ll_local_open(struct file *file, struct lookup_intent *it,
  * stripe MD to the MDS, or try to destroy the objects if that fails.
  *
  * If we already have the stripe MD locally then we don't request it in
- * mdc_open(), by passing a lmm_size = 0.
+ * md_open(), by passing a lmm_size = 0.
  *
  * It is up to the application to ensure no other processes open this file
  * in the O_LOV_DELAY_CREATE case, or the default striping pattern will be
@@ -383,7 +466,6 @@ int ll_file_open(struct inode *inode, struct file *file)
 
         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), flags %o\n", inode->i_ino,
                inode->i_generation, inode, file->f_flags);
-        ll_vfs_ops_tally(ll_i2sbi(inode), VFS_OPS_OPEN);
 
         /* don't do anything for / */
         if (inode->i_sb->s_root == file->f_dentry)
@@ -400,9 +482,16 @@ int ll_file_open(struct inode *inode, struct file *file)
         if (fd == NULL)
                 RETURN(-ENOMEM);
 
+        /* don't do anything for / */
+        if (inode->i_sb->s_root == file->f_dentry) {
+                LUSTRE_FPRIVATE(file) = fd;
+                RETURN(0);
+        }
+
         if (!it || !it->d.lustre.it_disposition) {
                 /* Convert f_flags into access mode. We cannot use file->f_mode,
-                 * because everything but O_ACCMODE mask was stripped from it */
+                 * because everything but O_ACCMODE mask was stripped from
+                 * there */
                 if ((oit.it_flags + 1) & O_ACCMODE)
                         oit.it_flags++;
                 if (file->f_flags & O_TRUNC)
@@ -433,22 +522,29 @@ int ll_file_open(struct inode *inode, struct file *file)
                 och_p = &lli->lli_mds_read_och;
                 och_usecount = &lli->lli_open_fd_read_count;
         }
-
-        LASSERTF(it->it_flags != 0, "it %p dist %d \n", it,
-                 it->d.lustre.it_disposition);
-
+        
         down(&lli->lli_och_sem);
         if (*och_p) { /* Open handle is present */
                 if (it_disposition(it, DISP_OPEN_OPEN)) {
                         /* Well, there's extra open request that we do not need,
                            let's close it somehow. This will decref request. */
+                        rc = it_open_error(DISP_OPEN_OPEN, it);
+                        if (rc) {
+                                ll_file_data_put(fd);
+                                GOTO(out_och_free, rc);
+                        }       
                         ll_release_openhandle(file->f_dentry, it);
+                        lprocfs_counter_incr(ll_i2sbi(inode)->ll_stats, 
+                                             LPROC_LL_OPEN);
                 }
                 (*och_usecount)++;
 
                 rc = ll_local_open(file, it, fd, NULL);
-
-                LASSERTF(rc == 0, "rc = %d\n", rc);
+                if (rc) {
+                        up(&lli->lli_och_sem);
+                        ll_file_data_put(fd);
+                        RETURN(rc);
+                }
         } else {
                 LASSERT(*och_usecount == 0);
                 OBD_ALLOC(*och_p, sizeof (struct obd_client_handle));
@@ -458,7 +554,9 @@ int ll_file_open(struct inode *inode, struct file *file)
                 }
                 (*och_usecount)++;
                 if (!it->d.lustre.it_disposition) {
+                        it->it_flags |= O_CHECK_STALE;
                         rc = ll_intent_file_open(file, NULL, 0, it);
+                        it->it_flags &= ~O_CHECK_STALE;
                         if (rc) {
                                 ll_file_data_put(fd);
                                 GOTO(out_och_free, rc);
@@ -469,12 +567,13 @@ int ll_file_open(struct inode *inode, struct file *file)
                                 req = it->d.lustre.it_data;
                                 ptlrpc_req_finished(req);
                         }
-                        mdc_set_lock_data(&it->d.lustre.it_lock_handle,
-                                          file->f_dentry->d_inode);
+                        md_set_lock_data(ll_i2sbi(inode)->ll_md_exp,
+                                         &it->d.lustre.it_lock_handle,
+                                         file->f_dentry->d_inode);
                 }
                 req = it->d.lustre.it_data;
 
-                /* mdc_intent_lock() didn't get a request ref if there was an
+                /* md_intent_lock() didn't get a request ref if there was an
                  * open error, so don't do cleanup on the request here
                  * (bug 3430) */
                 /* XXX (green): Should not we bail out on any error here, not
@@ -485,9 +584,13 @@ int ll_file_open(struct inode *inode, struct file *file)
                         GOTO(out_och_free, rc);
                 }
 
-                lprocfs_counter_incr(ll_i2sbi(inode)->ll_stats, LPROC_LL_OPEN);
+                ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_OPEN, 1);
                 rc = ll_local_open(file, it, fd, *och_p);
-                LASSERTF(rc == 0, "rc = %d\n", rc);
+                if (rc) {
+                        up(&lli->lli_och_sem);
+                        ll_file_data_put(fd);
+                        GOTO(out_och_free, rc);
+                }
         }
         up(&lli->lli_och_sem);
 
@@ -497,6 +600,8 @@ int ll_file_open(struct inode *inode, struct file *file)
         if (!S_ISREG(inode->i_mode))
                 GOTO(out, rc);
 
+        ll_capa_open(inode);
+
         lsm = lli->lli_smd;
         if (lsm == NULL) {
                 if (file->f_flags & O_LOV_DELAY_CREATE ||
@@ -507,14 +612,12 @@ int ll_file_open(struct inode *inode, struct file *file)
         }
         file->f_flags &= ~O_LOV_DELAY_CREATE;
         GOTO(out, rc);
- out:
+out:
         ptlrpc_req_finished(req);
         if (req)
                 it_clear_disposition(it, DISP_ENQ_OPEN_REF);
-        if (rc == 0) {
-                ll_open_complete(inode);
-        } else {
 out_och_free:
+        if (rc) {
                 if (*och_p) {
                         OBD_FREE(*och_p, sizeof (struct obd_client_handle));
                         *och_p = NULL; /* OBD_FREE writes some magic there */
@@ -522,43 +625,57 @@ out_och_free:
                 }
                 up(&lli->lli_och_sem);
         }
+
         return rc;
 }
 
 /* Fills the obdo with the attributes for the inode defined by lsm */
-int ll_lsm_getattr(struct obd_export *exp, struct lov_stripe_md *lsm,
-                   struct obdo *oa)
+int ll_inode_getattr(struct inode *inode, struct obdo *obdo)
 {
         struct ptlrpc_request_set *set;
+        struct ll_inode_info *lli = ll_i2info(inode);
+        struct lov_stripe_md *lsm = lli->lli_smd;
+
         struct obd_info oinfo = { { { 0 } } };
         int rc;
         ENTRY;
 
         LASSERT(lsm != NULL);
 
-        memset(oa, 0, sizeof *oa);
         oinfo.oi_md = lsm;
-        oinfo.oi_oa = oa;
-        oa->o_id = lsm->lsm_object_id;
-        oa->o_mode = S_IFREG;
-        oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLSIZE |
-                OBD_MD_FLBLOCKS | OBD_MD_FLBLKSZ | OBD_MD_FLMTIME |
-                OBD_MD_FLCTIME;
+        oinfo.oi_oa = obdo;
+        oinfo.oi_oa->o_id = lsm->lsm_object_id;
+        oinfo.oi_oa->o_gr = lsm->lsm_object_gr;
+        oinfo.oi_oa->o_mode = S_IFREG;
+        oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE |
+                               OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
+                               OBD_MD_FLBLKSZ | OBD_MD_FLATIME |
+                               OBD_MD_FLMTIME | OBD_MD_FLCTIME |
+                               OBD_MD_FLGROUP;
+        oinfo.oi_capa = ll_mdscapa_get(inode);
 
         set = ptlrpc_prep_set();
         if (set == NULL) {
+                CERROR("can't allocate ptlrpc set\n");
                 rc = -ENOMEM;
         } else {
-                rc = obd_getattr_async(exp, &oinfo, set);
+                rc = obd_getattr_async(ll_i2dtexp(inode), &oinfo, set);
                 if (rc == 0)
                         rc = ptlrpc_set_wait(set);
                 ptlrpc_set_destroy(set);
         }
+        capa_put(oinfo.oi_capa);
         if (rc)
                 RETURN(rc);
 
-        oa->o_valid &= (OBD_MD_FLBLOCKS | OBD_MD_FLBLKSZ | OBD_MD_FLMTIME |
-                        OBD_MD_FLCTIME | OBD_MD_FLSIZE);
+        oinfo.oi_oa->o_valid &= (OBD_MD_FLBLOCKS | OBD_MD_FLBLKSZ |
+                                 OBD_MD_FLATIME | OBD_MD_FLMTIME |
+                                 OBD_MD_FLCTIME | OBD_MD_FLSIZE);
+
+        obdo_refresh_inode(inode, oinfo.oi_oa, oinfo.oi_oa->o_valid);
+        CDEBUG(D_INODE, "objid "LPX64" size %Lu, blocks %lu, blksize %lu\n",
+               lli->lli_smd->lsm_object_id, i_size_read(inode),
+               inode->i_blocks, inode->i_blksize);
         RETURN(0);
 }
 
@@ -581,7 +698,7 @@ static int ll_lock_to_stripe_offset(struct inode *inode, struct ldlm_lock *lock)
 {
         struct ll_inode_info *lli = ll_i2info(inode);
         struct lov_stripe_md *lsm = lli->lli_smd;
-        struct obd_export *exp = ll_i2obdexp(inode);
+        struct obd_export *exp = ll_i2dtexp(inode);
         struct {
                 char name[16];
                 struct ldlm_lock *lock;
@@ -604,7 +721,7 @@ static int ll_lock_to_stripe_offset(struct inode *inode, struct ldlm_lock *lock)
 
 check:
         if (lsm->lsm_oinfo[stripe]->loi_id != lock->l_resource->lr_name.name[0]||
-            lsm->lsm_oinfo[stripe]->loi_gr != lock->l_resource->lr_name.name[1]){
+            lsm->lsm_oinfo[stripe]->loi_gr != lock->l_resource->lr_name.name[2]){
                 LDLM_ERROR(lock, "resource doesn't match object "LPU64"/"LPU64,
                            lsm->lsm_oinfo[stripe]->loi_id,
                            lsm->lsm_oinfo[stripe]->loi_gr);
@@ -631,18 +748,20 @@ void ll_pgcache_remove_extent(struct inode *inode, struct lov_stripe_md *lsm,
         struct page *page;
         int rc, rc2, discard = lock->l_flags & LDLM_FL_DISCARD_DATA;
         struct lustre_handle lockh;
-        ENTRY;
+        struct address_space *mapping = inode->i_mapping;
 
-        memcpy(&tmpex, &lock->l_policy_data, sizeof(tmpex));
+        ENTRY;
+        tmpex = lock->l_policy_data;
         CDEBUG(D_INODE|D_PAGE, "inode %lu(%p) ["LPU64"->"LPU64"] size: %llu\n",
                inode->i_ino, inode, tmpex.l_extent.start, tmpex.l_extent.end,
-               inode->i_size);
+               i_size_read(inode));
 
         /* our locks are page granular thanks to osc_enqueue, we invalidate the
          * whole page. */
         if ((tmpex.l_extent.start & ~CFS_PAGE_MASK) != 0 ||
             ((tmpex.l_extent.end + 1) & ~CFS_PAGE_MASK) != 0)
-                LDLM_ERROR(lock, "lock not aligned on CFS_PAGE_SIZE %lu", CFS_PAGE_SIZE);
+                LDLM_ERROR(lock, "lock not aligned on PAGE_SIZE %lu",
+                           CFS_PAGE_SIZE);
         LASSERT((tmpex.l_extent.start & ~CFS_PAGE_MASK) == 0);
         LASSERT(((tmpex.l_extent.end + 1) & ~CFS_PAGE_MASK) == 0);
 
@@ -660,7 +779,8 @@ void ll_pgcache_remove_extent(struct inode *inode, struct lov_stripe_md *lsm,
         if (end < tmpex.l_extent.end >> CFS_PAGE_SHIFT)
                 end = ~0;
 
-        i = inode->i_size ? (inode->i_size - 1) >> CFS_PAGE_SHIFT : 0;
+        i = i_size_read(inode) ? (__u64)(i_size_read(inode) - 1) >>
+            CFS_PAGE_SHIFT : 0;
         if (i < end)
                 end = i;
 
@@ -676,8 +796,8 @@ void ll_pgcache_remove_extent(struct inode *inode, struct lov_stripe_md *lsm,
         for (i = start; i <= end; i += (j + skip)) {
                 j = min(count - (i % count), end - i + 1);
                 LASSERT(j > 0);
-                LASSERT(inode->i_mapping);
-                if (ll_teardown_mmaps(inode->i_mapping,
+                LASSERT(mapping);
+                if (ll_teardown_mmaps(mapping,
                                       (__u64)i << CFS_PAGE_SHIFT,
                                       ((__u64)(i+j) << CFS_PAGE_SHIFT) - 1) )
                         break;
@@ -702,14 +822,14 @@ void ll_pgcache_remove_extent(struct inode *inode, struct lov_stripe_md *lsm,
                          tmpex.l_extent.start, lock->l_policy_data.l_extent.end,
                          start, i, end);
 
-                if (!mapping_has_pages(inode->i_mapping)) {
+                if (!mapping_has_pages(mapping)) {
                         CDEBUG(D_INODE|D_PAGE, "nothing left\n");
                         break;
                 }
 
                 cond_resched();
 
-                page = find_get_page(inode->i_mapping, i);
+                page = find_get_page(mapping, i);
                 if (page == NULL)
                         continue;
                 LL_CDEBUG_PAGE(D_PAGE, page, "lock page idx %lu ext "LPU64"\n",
@@ -719,27 +839,36 @@ void ll_pgcache_remove_extent(struct inode *inode, struct lov_stripe_md *lsm,
                 /* page->mapping to check with racing against teardown */
                 if (!discard && clear_page_dirty_for_io(page)) {
                         rc = ll_call_writepage(inode, page);
-                        if (rc != 0)
-                                CERROR("writepage of page %p failed: %d\n",
-                                       page, rc);
                         /* either waiting for io to complete or reacquiring
                          * the lock that the failed writepage released */
                         lock_page(page);
+                        wait_on_page_writeback(page);
+                        if (rc != 0) {
+                                CERROR("writepage inode %lu(%p) of page %p "
+                                       "failed: %d\n", inode->i_ino, inode,
+                                       page, rc);
+                                if (rc == -ENOSPC)
+                                        set_bit(AS_ENOSPC, &mapping->flags);
+                                else
+                                        set_bit(AS_EIO, &mapping->flags);
+                        }
                 }
 
                 tmpex.l_extent.end = tmpex.l_extent.start + CFS_PAGE_SIZE - 1;
-                /* check to see if another DLM lock covers this page  b=2765 */
+                /* check to see if another DLM lock covers this page b=2765 */
                 rc2 = ldlm_lock_match(lock->l_resource->lr_namespace,
                                       LDLM_FL_BLOCK_GRANTED|LDLM_FL_CBPENDING |
                                       LDLM_FL_TEST_LOCK,
                                       &lock->l_resource->lr_name, LDLM_EXTENT,
                                       &tmpex, LCK_PR | LCK_PW, &lockh);
-                if (rc2 == 0 && page->mapping != NULL) {
+
+                if (rc2 <= 0 && page->mapping != NULL) {
                         struct ll_async_page *llap = llap_cast_private(page);
-                        // checking again to account for writeback's lock_page()
+                        /* checking again to account for writeback's
+                         * lock_page() */
                         LL_CDEBUG_PAGE(D_PAGE, page, "truncating\n");
                         if (llap)
-                                ll_ra_accounting(llap, inode->i_mapping);
+                                ll_ra_accounting(llap, mapping);
                         ll_truncate_complete_page(page);
                 }
                 unlock_page(page);
@@ -812,7 +941,6 @@ static int ll_extent_lock_callback(struct ldlm_lock *lock,
                 lsm->lsm_oinfo[stripe]->loi_kms = kms;
                 unlock_res_and_lock(lock);
                 lov_stripe_unlock(lsm);
-                //ll_try_done_writing(inode);
         iput:
                 iput(inode);
                 break;
@@ -857,16 +985,16 @@ int ll_async_completion_ast(struct ldlm_lock *lock, int flags, void *data)
                 lvb = lock->l_lvb_data;
                 lsm->lsm_oinfo[stripe].loi_rss = lvb->lvb_size;
 
-                LOCK_INODE_MUTEX(inode);
                 lock_res_and_lock(lock);
+                ll_inode_size_lock(inode, 1);
                 kms = MAX(lsm->lsm_oinfo[stripe].loi_kms, lvb->lvb_size);
                 kms = ldlm_extent_shift_kms(NULL, kms);
                 if (lsm->lsm_oinfo[stripe].loi_kms != kms)
                         LDLM_DEBUG(lock, "updating kms from "LPU64" to "LPU64,
                                    lsm->lsm_oinfo[stripe].loi_kms, kms);
                 lsm->lsm_oinfo[stripe].loi_kms = kms;
+                ll_inode_size_unlock(inode, 1);
                 unlock_res_and_lock(lock);
-                UNLOCK_INODE_MUTEX(inode);
         }
 
 iput:
@@ -918,7 +1046,7 @@ static int ll_glimpse_callback(struct ldlm_lock *lock, void *reqp)
 
         LDLM_DEBUG(lock, "i_size: %llu -> stripe number %u -> kms "LPU64
                    " atime "LPU64", mtime "LPU64", ctime "LPU64,
-                   inode->i_size, stripe, lvb->lvb_size, lvb->lvb_mtime,
+                   i_size_read(inode), stripe, lvb->lvb_size, lvb->lvb_mtime,
                    lvb->lvb_atime, lvb->lvb_ctime);
  iput:
         iput(inode);
@@ -933,20 +1061,63 @@ static int ll_glimpse_callback(struct ldlm_lock *lock, void *reqp)
         return rc;
 }
 
+static void ll_merge_lvb(struct inode *inode)
+{
+        struct ll_inode_info *lli = ll_i2info(inode);
+        struct ll_sb_info *sbi = ll_i2sbi(inode);
+        struct ost_lvb lvb;
+        ENTRY;
+
+        ll_inode_size_lock(inode, 1);
+        inode_init_lvb(inode, &lvb);
+        obd_merge_lvb(sbi->ll_dt_exp, lli->lli_smd, &lvb, 0);
+        i_size_write(inode, lvb.lvb_size);
+        inode->i_blocks = lvb.lvb_blocks;
+        LTIME_S(inode->i_mtime) = lvb.lvb_mtime;
+        LTIME_S(inode->i_atime) = lvb.lvb_atime;
+        LTIME_S(inode->i_ctime) = lvb.lvb_ctime;
+        ll_inode_size_unlock(inode, 1);
+        EXIT;
+}
+
+int ll_local_size(struct inode *inode)
+{
+        ldlm_policy_data_t policy = { .l_extent = { 0, OBD_OBJECT_EOF } };
+        struct ll_inode_info *lli = ll_i2info(inode);
+        struct ll_sb_info *sbi = ll_i2sbi(inode);
+        struct lustre_handle lockh = { 0 };
+        int flags = 0;
+        int rc;
+        ENTRY;
+
+        if (lli->lli_smd->lsm_stripe_count == 0)
+                RETURN(0);
+
+        rc = obd_match(sbi->ll_dt_exp, lli->lli_smd, LDLM_EXTENT,
+                       &policy, LCK_PR | LCK_PW, &flags, inode, &lockh);
+        if (rc < 0)
+                RETURN(rc);
+        else if (rc == 0)
+                RETURN(-ENODATA);
+
+        ll_merge_lvb(inode);
+        obd_cancel(sbi->ll_dt_exp, lli->lli_smd, LCK_PR | LCK_PW, &lockh);
+        RETURN(0);
+}
+
 int ll_glimpse_ioctl(struct ll_sb_info *sbi, struct lov_stripe_md *lsm,
                      lstat_t *st)
 {
         struct lustre_handle lockh = { 0 };
-        struct obd_enqueue_info einfo = { 0 };
+        struct ldlm_enqueue_info einfo = { 0 };
         struct obd_info oinfo = { { { 0 } } };
         struct ost_lvb lvb;
         int rc;
-        
+
         ENTRY;
-        
+
         einfo.ei_type = LDLM_EXTENT;
         einfo.ei_mode = LCK_PR;
-        einfo.ei_flags = LDLM_FL_HAS_INTENT;
         einfo.ei_cb_bl = ll_extent_lock_callback;
         einfo.ei_cb_cp = ldlm_completion_ast;
         einfo.ei_cb_gl = ll_glimpse_callback;
@@ -955,8 +1126,9 @@ int ll_glimpse_ioctl(struct ll_sb_info *sbi, struct lov_stripe_md *lsm,
         oinfo.oi_policy.l_extent.end = OBD_OBJECT_EOF;
         oinfo.oi_lockh = &lockh;
         oinfo.oi_md = lsm;
+        oinfo.oi_flags = LDLM_FL_HAS_INTENT;
 
-        rc = obd_enqueue_rqset(sbi->ll_osc_exp, &oinfo, &einfo);
+        rc = obd_enqueue_rqset(sbi->ll_dt_exp, &oinfo, &einfo);
         if (rc == -ENOENT)
                 RETURN(rc);
         if (rc != 0) {
@@ -964,17 +1136,17 @@ int ll_glimpse_ioctl(struct ll_sb_info *sbi, struct lov_stripe_md *lsm,
                        "returning -EIO\n", rc);
                 RETURN(rc > 0 ? -EIO : rc);
         }
-        
+
         lov_stripe_lock(lsm);
         memset(&lvb, 0, sizeof(lvb));
-        obd_merge_lvb(sbi->ll_osc_exp, lsm, &lvb, 0);
+        obd_merge_lvb(sbi->ll_dt_exp, lsm, &lvb, 0);
         st->st_size = lvb.lvb_size;
         st->st_blocks = lvb.lvb_blocks;
         st->st_mtime = lvb.lvb_mtime;
         st->st_atime = lvb.lvb_atime;
         st->st_ctime = lvb.lvb_ctime;
         lov_stripe_unlock(lsm);
-        
+
         RETURN(rc);
 }
 
@@ -985,12 +1157,14 @@ int ll_glimpse_size(struct inode *inode, int ast_flags)
         struct ll_inode_info *lli = ll_i2info(inode);
         struct ll_sb_info *sbi = ll_i2sbi(inode);
         struct lustre_handle lockh = { 0 };
-        struct obd_enqueue_info einfo = { 0 };
+        struct ldlm_enqueue_info einfo = { 0 };
         struct obd_info oinfo = { { { 0 } } };
-        struct ost_lvb lvb;
         int rc;
         ENTRY;
 
+        if (lli->lli_flags & LLIF_MDS_SIZE_LOCK)
+                RETURN(0);
+
         CDEBUG(D_DLMTRACE, "Glimpsing inode %lu\n", inode->i_ino);
 
         if (!lli->lli_smd) {
@@ -1007,7 +1181,6 @@ int ll_glimpse_size(struct inode *inode, int ast_flags)
          *       acquired only if there were no conflicting locks. */
         einfo.ei_type = LDLM_EXTENT;
         einfo.ei_mode = LCK_PR;
-        einfo.ei_flags = ast_flags | LDLM_FL_HAS_INTENT;
         einfo.ei_cb_bl = ll_extent_lock_callback;
         einfo.ei_cb_cp = ldlm_completion_ast;
         einfo.ei_cb_gl = ll_glimpse_callback;
@@ -1016,8 +1189,9 @@ int ll_glimpse_size(struct inode *inode, int ast_flags)
         oinfo.oi_policy.l_extent.end = OBD_OBJECT_EOF;
         oinfo.oi_lockh = &lockh;
         oinfo.oi_md = lli->lli_smd;
+        oinfo.oi_flags = ast_flags | LDLM_FL_HAS_INTENT;
 
-        rc = obd_enqueue_rqset(sbi->ll_osc_exp, &oinfo, &einfo);
+        rc = obd_enqueue_rqset(sbi->ll_dt_exp, &oinfo, &einfo);
         if (rc == -ENOENT)
                 RETURN(rc);
         if (rc != 0) {
@@ -1025,18 +1199,10 @@ int ll_glimpse_size(struct inode *inode, int ast_flags)
                 RETURN(rc > 0 ? -EIO : rc);
         }
 
-        ll_inode_size_lock(inode, 1);
-        inode_init_lvb(inode, &lvb);
-        obd_merge_lvb(sbi->ll_osc_exp, lli->lli_smd, &lvb, 0);
-        inode->i_size = lvb.lvb_size;
-        inode->i_blocks = lvb.lvb_blocks;
-        LTIME_S(inode->i_mtime) = lvb.lvb_mtime;
-        LTIME_S(inode->i_atime) = lvb.lvb_atime;
-        LTIME_S(inode->i_ctime) = lvb.lvb_ctime;
-        ll_inode_size_unlock(inode, 1);
+        ll_merge_lvb(inode);
 
         CDEBUG(D_DLMTRACE, "glimpse: size: %llu, blocks: %lu\n",
-               inode->i_size, inode->i_blocks);
+               i_size_read(inode), inode->i_blocks);
 
         RETURN(rc);
 }
@@ -1048,7 +1214,7 @@ int ll_extent_lock(struct ll_file_data *fd, struct inode *inode,
 {
         struct ll_sb_info *sbi = ll_i2sbi(inode);
         struct ost_lvb lvb;
-        struct obd_enqueue_info einfo = { 0 };
+        struct ldlm_enqueue_info einfo = { 0 };
         struct obd_info oinfo = { { { 0 } } };
         int rc;
         ENTRY;
@@ -1070,7 +1236,6 @@ int ll_extent_lock(struct ll_file_data *fd, struct inode *inode,
 
         einfo.ei_type = LDLM_EXTENT;
         einfo.ei_mode = mode;
-        einfo.ei_flags = ast_flags;
         einfo.ei_cb_bl = ll_extent_lock_callback;
         einfo.ei_cb_cp = ldlm_completion_ast;
         einfo.ei_cb_gl = ll_glimpse_callback;
@@ -1079,15 +1244,16 @@ int ll_extent_lock(struct ll_file_data *fd, struct inode *inode,
         oinfo.oi_policy = *policy;
         oinfo.oi_lockh = lockh;
         oinfo.oi_md = lsm;
+        oinfo.oi_flags = ast_flags;
 
-        rc = obd_enqueue(sbi->ll_osc_exp, &oinfo, &einfo);
+        rc = obd_enqueue(sbi->ll_dt_exp, &oinfo, &einfo, NULL);
         *policy = oinfo.oi_policy;
         if (rc > 0)
                 rc = -EIO;
 
         ll_inode_size_lock(inode, 1);
         inode_init_lvb(inode, &lvb);
-        obd_merge_lvb(sbi->ll_osc_exp, lsm, &lvb, 1);
+        obd_merge_lvb(sbi->ll_dt_exp, lsm, &lvb, 1);
 
         if (policy->l_extent.start == 0 &&
             policy->l_extent.end == OBD_OBJECT_EOF) {
@@ -1101,9 +1267,9 @@ int ll_extent_lock(struct ll_file_data *fd, struct inode *inode,
                  * cancel the result of the truncate.  Getting the
                  * ll_inode_size_lock() after the enqueue maintains the DLM
                  * -> ll_inode_size_lock() acquiring order. */
-                inode->i_size = lvb.lvb_size;
+                i_size_write(inode, lvb.lvb_size);
                 CDEBUG(D_INODE, "inode=%lu, updating i_size %llu\n",
-                       inode->i_ino, inode->i_size);
+                       inode->i_ino, i_size_read(inode));
         }
 
         if (rc == 0) {
@@ -1129,7 +1295,7 @@ int ll_extent_unlock(struct ll_file_data *fd, struct inode *inode,
             (sbi->ll_flags & LL_SBI_NOLCK))
                 RETURN(0);
 
-        rc = obd_cancel(sbi->ll_osc_exp, lsm, mode, lockh);
+        rc = obd_cancel(sbi->ll_dt_exp, lsm, mode, lockh);
 
         RETURN(rc);
 }
@@ -1153,14 +1319,12 @@ static ssize_t ll_file_read(struct file *file, char *buf, size_t count,
         ENTRY;
         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p),size="LPSZ",offset=%Ld\n",
                inode->i_ino, inode->i_generation, inode, count, *ppos);
-        ll_vfs_ops_tally(sbi, VFS_OPS_READ);
-
         /* "If nbyte is 0, read() will return 0 and have no other results."
          *                      -- Single Unix Spec */
         if (count == 0)
                 RETURN(0);
 
-        lprocfs_counter_add(sbi->ll_stats, LPROC_LL_READ_BYTES, count);
+        ll_stats_ops_tally(sbi, LPROC_LL_READ_BYTES, count);
 
         if (!lsm) {
                 /* Read on file with no objects should return zero-filled
@@ -1173,11 +1337,11 @@ static ssize_t ll_file_read(struct file *file, char *buf, size_t count,
                  * unguarded */
 
                 /* Read beyond end of file */
-                if (*ppos >= inode->i_size)
+                if (*ppos >= i_size_read(inode))
                         RETURN(0);
 
-                if (count > inode->i_size - *ppos)
-                        count = inode->i_size - *ppos;
+                if (count > i_size_read(inode) - *ppos)
+                        count = i_size_read(inode) - *ppos;
                 /* Make sure to correctly adjust the file pos pointer for
                  * EFAULT case */
                 notzeroed = clear_user(buf, count);
@@ -1192,7 +1356,7 @@ repeat:
         if (sbi->ll_max_rw_chunk != 0) {
                 /* first, let's know the end of the current stripe */
                 end = *ppos;
-                obd_extent_calc(sbi->ll_osc_exp, lsm, OBD_CALC_STRIPE_END,
+                obd_extent_calc(sbi->ll_dt_exp, lsm, OBD_CALC_STRIPE_END, 
                                 (obd_off *)&end);
 
                 /* correct, the end is beyond the request */
@@ -1205,8 +1369,12 @@ repeat:
         } else {
                 end = *ppos + count - 1;
         }
-       
+
         node = ll_node_from_inode(inode, *ppos, end, LCK_PR);
+        if (IS_ERR(node)){
+                GOTO(out, retval = PTR_ERR(node));
+        }
+
         tree.lt_fd = LUSTRE_FPRIVATE(file);
         rc = ll_tree_lock(&tree, node, buf, count,
                           file->f_flags & O_NONBLOCK ? LDLM_FL_BLOCK_NOWAIT :0);
@@ -1234,7 +1402,7 @@ repeat:
          * correctly in the face of concurrent writes and truncates.
          */
         inode_init_lvb(inode, &lvb);
-        obd_merge_lvb(ll_i2sbi(inode)->ll_osc_exp, lsm, &lvb, 1);
+        obd_merge_lvb(sbi->ll_dt_exp, lsm, &lvb, 1);
         kms = lvb.lvb_size;
         if (*ppos + count - 1 > kms) {
                 /* A glimpse is necessary to determine whether we return a
@@ -1252,21 +1420,18 @@ repeat:
                  * the kms size is _correct_, it is only the _minimum_ size.
                  * If someone does a stat they will get the correct size which
                  * will always be >= the kms value here.  b=11081 */
-                if (inode->i_size < kms)
-                        inode->i_size = kms;
+                if (i_size_read(inode) < kms)
+                        i_size_write(inode, kms);
                 ll_inode_size_unlock(inode, 1);
         }
 
         chunk = end - *ppos + 1;
-        CDEBUG(D_INODE,"Read ino %lu, "LPSZ" bytes, offset %lld, i_size %llu\n",
-               inode->i_ino, chunk, *ppos, inode->i_size);
+        CDEBUG(D_INODE, "Read ino %lu, "LPSZ" bytes, offset %lld, i_size %llu\n",
+               inode->i_ino, chunk, *ppos, i_size_read(inode));
 
         /* turn off the kernel's read-ahead */
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
-        file->f_ramax = 0;
-#else
         file->f_ra.ra_pages = 0;
-#endif
+
         /* initialize read-ahead window once per syscall */
         if (ra == 0) {
                 ra = 1;
@@ -1278,7 +1443,7 @@ repeat:
         /* BUG: 5972 */
         file_accessed(file);
         retval = generic_file_read(file, buf, chunk, ppos);
-        ll_rw_stats_tally(ll_i2sbi(inode), current->pid, file, count, 0);
+        ll_rw_stats_tally(sbi, current->pid, file, count, 0);
 
         ll_tree_unlock(&tree);
 
@@ -1316,8 +1481,7 @@ static ssize_t ll_file_write(struct file *file, const char *buf, size_t count,
 
         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p),size="LPSZ",offset=%Ld\n",
                inode->i_ino, inode->i_generation, inode, count, *ppos);
-        ll_vfs_ops_tally(sbi, VFS_OPS_WRITE);
-        
+
         SIGNAL_MASK_ASSERT(); /* XXX BUG 1511 */
 
         /* POSIX, but surprised the VFS doesn't check this already */
@@ -1344,7 +1508,7 @@ repeat:
         } else if (sbi->ll_max_rw_chunk != 0) {
                 /* first, let's know the end of the current stripe */
                 end = *ppos;
-                obd_extent_calc(sbi->ll_osc_exp, lsm, OBD_CALC_STRIPE_END, 
+                obd_extent_calc(sbi->ll_dt_exp, lsm, OBD_CALC_STRIPE_END,
                                 (obd_off *)&end);
 
                 /* correct, the end is beyond the request */
@@ -1376,13 +1540,13 @@ repeat:
          * The i_size value gets updated in ll_extent_lock() as a consequence
          * of the [0,EOF] extent lock we requested above. */
         if (file->f_flags & O_APPEND) {
-                *ppos = inode->i_size;
+                *ppos = i_size_read(inode);
                 end = *ppos + count - 1;
         }
 
         if (*ppos >= maxbytes) {
                 send_sig(SIGXFSZ, current, 0);
-                GOTO(out, retval = -EFBIG);
+                GOTO(out_unlock, retval = -EFBIG);
         }
         if (*ppos + count > maxbytes)
                 count = maxbytes - *ppos;
@@ -1394,9 +1558,10 @@ repeat:
         retval = generic_file_write(file, buf, chunk, ppos);
         ll_rw_stats_tally(ll_i2sbi(inode), current->pid, file, count, 1);
 
-out:
+out_unlock:
         ll_tree_unlock(&tree);
 
+out:
         if (retval > 0) {
                 buf += retval;
                 count -= retval;
@@ -1408,23 +1573,14 @@ out:
         up(&ll_i2info(inode)->lli_write_sem);
 
         retval = (sum > 0) ? sum : retval;
-        lprocfs_counter_add(ll_i2sbi(inode)->ll_stats, LPROC_LL_WRITE_BYTES,
-                            retval > 0 ? retval : 0);
-
-        if (retval > 0 && ((file->f_flags & O_SYNC) || IS_SYNC(inode))) {
-                rc = ll_sync_page_range(inode, inode->i_mapping, *ppos - retval,
-                                        count);
-                if (rc < 0)
-                        retval = rc;
-        }
-
+        ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_WRITE_BYTES,
+                           retval > 0 ? retval : 0);
         RETURN(retval);
 }
 
 /*
  * Send file content (through pagecache) somewhere with helper
  */
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
 static ssize_t ll_file_sendfile(struct file *in_file, loff_t *ppos,size_t count,
                                 read_actor_t actor, void *target)
 {
@@ -1447,9 +1603,7 @@ static ssize_t ll_file_sendfile(struct file *in_file, loff_t *ppos,size_t count,
         if (count == 0)
                 RETURN(0);
 
-        lprocfs_counter_add(ll_i2sbi(inode)->ll_stats, LPROC_LL_READ_BYTES,
-                            count);
-
+        ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_READ_BYTES, count);
         /* turn off the kernel's read-ahead */
         in_file->f_ra.ra_pages = 0;
 
@@ -1458,6 +1612,9 @@ static ssize_t ll_file_sendfile(struct file *in_file, loff_t *ppos,size_t count,
                 RETURN(generic_file_sendfile(in_file, ppos, count, actor, target));
 
         node = ll_node_from_inode(inode, *ppos, *ppos + count - 1, LCK_PR);
+        if (IS_ERR(node))
+                RETURN(PTR_ERR(node));
+
         tree.lt_fd = LUSTRE_FPRIVATE(in_file);
         rc = ll_tree_lock(&tree, node, NULL, count,
                           in_file->f_flags & O_NONBLOCK?LDLM_FL_BLOCK_NOWAIT:0);
@@ -1485,7 +1642,7 @@ static ssize_t ll_file_sendfile(struct file *in_file, loff_t *ppos,size_t count,
          * correctly in the face of concurrent writes and truncates.
          */
         inode_init_lvb(inode, &lvb);
-        obd_merge_lvb(ll_i2sbi(inode)->ll_osc_exp, lsm, &lvb, 1);
+        obd_merge_lvb(ll_i2sbi(inode)->ll_dt_exp, lsm, &lvb, 1);
         kms = lvb.lvb_size;
         if (*ppos + count - 1 > kms) {
                 /* A glimpse is necessary to determine whether we return a
@@ -1496,12 +1653,12 @@ static ssize_t ll_file_sendfile(struct file *in_file, loff_t *ppos,size_t count,
                         goto out;
         } else {
                 /* region is within kms and, hence, within real file size (A) */
-                inode->i_size = kms;
+                i_size_write(inode, kms);
                 ll_inode_size_unlock(inode, 1);
         }
 
         CDEBUG(D_INFO, "Send ino %lu, "LPSZ" bytes, offset %lld, i_size %llu\n",
-               inode->i_ino, count, *ppos, inode->i_size);
+               inode->i_ino, count, *ppos, i_size_read(inode));
 
         bead.lrr_start = *ppos >> CFS_PAGE_SHIFT;
         bead.lrr_count = (count + CFS_PAGE_SIZE - 1) >> CFS_PAGE_SHIFT;
@@ -1515,13 +1672,12 @@ static ssize_t ll_file_sendfile(struct file *in_file, loff_t *ppos,size_t count,
         ll_tree_unlock(&tree);
         RETURN(retval);
 }
-#endif
 
 static int ll_lov_recreate_obj(struct inode *inode, struct file *file,
                                unsigned long arg)
 {
         struct ll_inode_info *lli = ll_i2info(inode);
-        struct obd_export *exp = ll_i2obdexp(inode);
+        struct obd_export *exp = ll_i2dtexp(inode);
         struct ll_recreate_obj ucreatp;
         struct obd_trans_info oti = { 0 };
         struct obdo *oa = NULL;
@@ -1538,11 +1694,11 @@ static int ll_lov_recreate_obj(struct inode *inode, struct file *file,
         if (rc) {
                 RETURN(-EFAULT);
         }
-        oa = obdo_alloc();
+        OBDO_ALLOC(oa);
         if (oa == NULL)
                 RETURN(-ENOMEM);
 
-        down(&lli->lli_open_sem);
+        down(&lli->lli_size_sem);
         lsm = lli->lli_smd;
         if (lsm == NULL)
                 GOTO(out, rc = -ENOENT);
@@ -1554,9 +1710,10 @@ static int ll_lov_recreate_obj(struct inode *inode, struct file *file,
                 GOTO(out, rc = -ENOMEM);
 
         oa->o_id = ucreatp.lrc_id;
+        oa->o_gr = ucreatp.lrc_group;
         oa->o_nlink = ucreatp.lrc_ost_idx;
         oa->o_flags |= OBD_FL_RECREATE_OBJS;
-        oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS;
+        oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS | OBD_MD_FLGROUP;
         obdo_from_inode(oa, inode, OBD_MD_FLTYPE | OBD_MD_FLATIME |
                         OBD_MD_FLMTIME | OBD_MD_FLCTIME);
 
@@ -1567,14 +1724,13 @@ static int ll_lov_recreate_obj(struct inode *inode, struct file *file,
         OBD_FREE(lsm2, lsm_size);
         GOTO(out, rc);
 out:
-        up(&lli->lli_open_sem);
-        obdo_free(oa);
+        up(&lli->lli_size_sem);
+        OBDO_FREE(oa);
         return rc;
 }
 
 int ll_lov_setstripe_ea_info(struct inode *inode, struct file *file,
-                                    int flags, struct lov_user_md *lum,
-                                    int lum_size)
+                             int flags, struct lov_user_md *lum, int lum_size)
 {
         struct ll_inode_info *lli = ll_i2info(inode);
         struct lov_stripe_md *lsm;
@@ -1582,10 +1738,10 @@ int ll_lov_setstripe_ea_info(struct inode *inode, struct file *file,
         int rc = 0;
         ENTRY;
 
-        down(&lli->lli_open_sem);
+        down(&lli->lli_size_sem);
         lsm = lli->lli_smd;
         if (lsm) {
-                up(&lli->lli_open_sem);
+                up(&lli->lli_size_sem);
                 CDEBUG(D_IOCTL, "stripe already exists for ino %lu\n",
                        inode->i_ino);
                 RETURN(-EEXIST);
@@ -1603,7 +1759,7 @@ int ll_lov_setstripe_ea_info(struct inode *inode, struct file *file,
         ll_release_openhandle(file->f_dentry, &oit);
 
  out:
-        up(&lli->lli_open_sem);
+        up(&lli->lli_size_sem);
         ll_intent_release(&oit);
         RETURN(rc);
 out_req_free:
@@ -1616,30 +1772,28 @@ int ll_lov_getstripe_ea_info(struct inode *inode, const char *filename,
                              struct ptlrpc_request **request)
 {
         struct ll_sb_info *sbi = ll_i2sbi(inode);
-        struct ll_fid  fid;
-        struct mds_body  *body;
+        struct mdt_body  *body;
         struct lov_mds_md *lmm = NULL;
         struct ptlrpc_request *req = NULL;
+        struct obd_capa *oc;
         int rc, lmmsize;
 
-        ll_inode2fid(&fid, inode);
-
         rc = ll_get_max_mdsize(sbi, &lmmsize);
         if (rc)
                 RETURN(rc);
 
-        rc = mdc_getattr_name(sbi->ll_mdc_exp, &fid,
-                        filename, strlen(filename) + 1,
-                        OBD_MD_FLEASIZE | OBD_MD_FLDIREA,
-                        lmmsize, &req);
+        oc = ll_mdscapa_get(inode);
+        rc = md_getattr_name(sbi->ll_md_exp, ll_inode2fid(inode),
+                             oc, filename, strlen(filename) + 1,
+                             OBD_MD_FLEASIZE | OBD_MD_FLDIREA, lmmsize, &req);
+        capa_put(oc);
         if (rc < 0) {
-                CDEBUG(D_INFO, "mdc_getattr_name failed "
-                                "on %s: rc %d\n", filename, rc);
+                CDEBUG(D_INFO, "md_getattr_name failed "
+                       "on %s: rc %d\n", filename, rc);
                 GOTO(out, rc);
         }
 
-        body = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF,
-                        sizeof(*body));
+        body = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF, sizeof(*body));
         LASSERT(body != NULL); /* checked by mdc_getattr_name */
         /* swabbed by mdc_getattr_name */
         LASSERT_REPSWABBED(req, REPLY_REC_OFF);
@@ -1651,8 +1805,7 @@ int ll_lov_getstripe_ea_info(struct inode *inode, const char *filename,
                 GOTO(out, rc = -ENODATA);
         }
 
-        lmm = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF + 1,
-                        lmmsize);
+        lmm = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF + 1, lmmsize);
         LASSERT(lmm != NULL);
         LASSERT_REPSWABBED(req, REPLY_REC_OFF + 1);
 
@@ -1673,16 +1826,16 @@ int ll_lov_getstripe_ea_info(struct inode *inode, const char *filename,
                 struct lov_user_md_join *lmj;
                 int lmj_size, i, aindex = 0;
 
-                rc = obd_unpackmd(sbi->ll_osc_exp, &lsm, lmm, lmmsize);
+                rc = obd_unpackmd(sbi->ll_dt_exp, &lsm, lmm, lmmsize);
                 if (rc < 0)
                         GOTO(out, rc = -ENOMEM);
-                rc = obd_checkmd(sbi->ll_osc_exp, sbi->ll_mdc_exp, lsm);
+                rc = obd_checkmd(sbi->ll_dt_exp, sbi->ll_md_exp, lsm);
                 if (rc)
                         GOTO(out_free_memmd, rc);
 
                 lmj_size = sizeof(struct lov_user_md_join) +
-                        lsm->lsm_stripe_count *
-                        sizeof(struct lov_user_ost_data_join);
+                           lsm->lsm_stripe_count *
+                           sizeof(struct lov_user_ost_data_join);
                 OBD_ALLOC(lmj, lmj_size);
                 if (!lmj)
                         GOTO(out_free_memmd, rc = -ENOMEM);
@@ -1717,7 +1870,7 @@ int ll_lov_getstripe_ea_info(struct inode *inode, const char *filename,
                 lmm = (struct lov_mds_md *)lmj;
                 lmmsize = lmj_size;
 out_free_memmd:
-                obd_free_memmd(sbi->ll_osc_exp, &lsm);
+                obd_free_memmd(sbi->ll_dt_exp, &lsm);
         }
 out:
         *lmmp = lmm;
@@ -1725,6 +1878,7 @@ out:
         *request = req;
         return rc;
 }
+
 static int ll_lov_setea(struct inode *inode, struct file *file,
                             unsigned long arg)
 {
@@ -1772,7 +1926,7 @@ static int ll_lov_setstripe(struct inode *inode, struct file *file,
         rc = ll_lov_setstripe_ea_info(inode, file, flags, &lum, sizeof(lum));
         if (rc == 0) {
                  put_user(0, &lump->lmm_stripe_count);
-                 rc = obd_iocontrol(LL_IOC_LOV_GETSTRIPE, ll_i2obdexp(inode),
+                 rc = obd_iocontrol(LL_IOC_LOV_GETSTRIPE, ll_i2dtexp(inode),
                                     0, ll_i2info(inode)->lli_smd, lump);
         }
         RETURN(rc);
@@ -1785,7 +1939,7 @@ static int ll_lov_getstripe(struct inode *inode, unsigned long arg)
         if (!lsm)
                 RETURN(-ENODATA);
 
-        return obd_iocontrol(LL_IOC_LOV_GETSTRIPE, ll_i2obdexp(inode), 0, lsm,
+        return obd_iocontrol(LL_IOC_LOV_GETSTRIPE, ll_i2dtexp(inode), 0, lsm,
                             (void *)arg);
 }
 
@@ -1865,8 +2019,8 @@ static int join_sanity_check(struct inode *head, struct inode *tail)
                 CERROR("file %lu can not be joined to itself \n", head->i_ino);
                 RETURN(-EINVAL);
         }
-        if (head->i_size % JOIN_FILE_ALIGN) {
-                CERROR("hsize %llu must be times of 64K\n", head->i_size);
+        if (i_size_read(head) % JOIN_FILE_ALIGN) {
+                CERROR("hsize %llu must be times of 64K\n", i_size_read(head));
                 RETURN(-EINVAL);
         }
         RETURN(0);
@@ -1875,41 +2029,42 @@ static int join_sanity_check(struct inode *head, struct inode *tail)
 static int join_file(struct inode *head_inode, struct file *head_filp,
                      struct file *tail_filp)
 {
-        struct inode *tail_inode, *tail_parent;
         struct dentry *tail_dentry = tail_filp->f_dentry;
         struct lookup_intent oit = {.it_op = IT_OPEN,
                                    .it_flags = head_filp->f_flags|O_JOIN_FILE};
+        struct ldlm_enqueue_info einfo = { LDLM_IBITS, LCK_CW,
+                ll_md_blocking_ast, ldlm_completion_ast, NULL, NULL };
+
         struct lustre_handle lockh;
-        struct mdc_op_data *op_data;
-        __u32  hsize = head_inode->i_size >> 32;
-        __u32  tsize = head_inode->i_size;
+        struct md_op_data *op_data;
         int    rc;
+        loff_t data;
         ENTRY;
 
         tail_dentry = tail_filp->f_dentry;
-        tail_inode = tail_dentry->d_inode;
-        tail_parent = tail_dentry->d_parent->d_inode;
 
-        OBD_ALLOC_PTR(op_data);
-        if (op_data == NULL) {
-                RETURN(-ENOMEM);
-        }
+        data = i_size_read(head_inode);
+        op_data = ll_prep_md_op_data(NULL, head_inode,
+                                     tail_dentry->d_parent->d_inode,
+                                     tail_dentry->d_name.name,
+                                     tail_dentry->d_name.len, 0,
+                                     LUSTRE_OPC_ANY, &data);
+        if (IS_ERR(op_data))
+                RETURN(PTR_ERR(op_data));
 
-        ll_prepare_mdc_op_data(op_data, head_inode, tail_parent,
-                               tail_dentry->d_name.name,
-                               tail_dentry->d_name.len, 0);
-        rc = mdc_enqueue(ll_i2mdcexp(head_inode), LDLM_IBITS, &oit, LCK_PW,
-                         op_data, &lockh, &tsize, 0, ldlm_completion_ast,
-                         ll_mdc_blocking_ast, &hsize, 0);
+        rc = md_enqueue(ll_i2mdexp(head_inode), &einfo, &oit, 
+                         op_data, &lockh, NULL, 0, 0);
 
+        ll_finish_md_op_data(op_data);
         if (rc < 0)
                 GOTO(out, rc);
 
         rc = oit.d.lustre.it_status;
 
-        if (rc < 0) {
+        if (rc < 0 || it_open_error(DISP_OPEN_OPEN, &oit)) {
+                rc = rc ? rc : it_open_error(DISP_OPEN_OPEN, &oit);
                 ptlrpc_req_finished((struct ptlrpc_request *)
-                                                          oit.d.lustre.it_data);
+                                    oit.d.lustre.it_data);
                 GOTO(out, rc);
         }
 
@@ -1920,8 +2075,6 @@ static int join_file(struct inode *head_inode, struct file *head_filp,
         }
         ll_release_openhandle(head_filp->f_dentry, &oit);
 out:
-        if (op_data)
-                OBD_FREE_PTR(op_data);
         ll_intent_release(&oit);
         RETURN(rc);
 }
@@ -1995,18 +2148,18 @@ cleanup:
         switch (cleanup_phase) {
         case 3:
                 ll_tree_unlock(&second_tree);
-                obd_cancel_unused(ll_i2obdexp(second),
+                obd_cancel_unused(ll_i2dtexp(second),
                                   ll_i2info(second)->lli_smd, 0, NULL);
         case 2:
                 ll_tree_unlock(&first_tree);
-                obd_cancel_unused(ll_i2obdexp(first),
+                obd_cancel_unused(ll_i2dtexp(first),
                                   ll_i2info(first)->lli_smd, 0, NULL);
         case 1:
                 filp_close(tail_filp, 0);
                 if (tail)
                         iput(tail);
                 if (head && rc == 0) {
-                        obd_free_memmd(ll_i2sbi(head)->ll_osc_exp,
+                        obd_free_memmd(ll_i2sbi(head)->ll_dt_exp,
                                        &hlli->lli_smd);
                         hlli->lli_smd = NULL;
                 }
@@ -2036,15 +2189,17 @@ int ll_release_openhandle(struct dentry *dentry, struct lookup_intent *it)
         if (!it_disposition(it, DISP_OPEN_OPEN))
                 RETURN(0);
 
+        LASSERT(it_open_error(DISP_OPEN_OPEN, it) == 0);
+
         OBD_ALLOC(och, sizeof(*och));
         if (!och)
                 GOTO(out, rc = -ENOMEM);
 
-        ll_och_fill(ll_i2info(inode), it, och);
+        ll_och_fill(ll_i2sbi(inode)->ll_md_exp,
+                    ll_i2info(inode), it, och);
 
-        rc = ll_close_inode_openhandle(inode, och);
-
-        OBD_FREE(och, sizeof(*och));
+        rc = ll_close_inode_openhandle(ll_i2sbi(inode)->ll_md_exp,
+                                       inode, och);
  out:
         /* this one is in place of ll_file_open */
         ptlrpc_req_finished(it->d.lustre.it_data);
@@ -2061,13 +2216,12 @@ int ll_file_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
 
         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p),cmd=%x\n", inode->i_ino,
                inode->i_generation, inode, cmd);
-        ll_vfs_ops_tally(ll_i2sbi(inode), VFS_OPS_IOCTL);
+        ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
 
         /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
         if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
                 RETURN(-ENOTTY);
 
-        lprocfs_counter_incr(ll_i2sbi(inode)->ll_stats, LPROC_LL_IOCTL);
         switch(cmd) {
         case LL_IOC_GETFLAGS:
                 /* Get the current value of the file flags */
@@ -2132,10 +2286,35 @@ int ll_file_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
         case EXT3_IOC_SETVERSION_OLD:
         case EXT3_IOC_SETVERSION:
         */
-        default:
-                RETURN(obd_iocontrol(cmd, ll_i2obdexp(inode), 0, NULL,
+        case LL_IOC_FLUSHCTX:
+                RETURN(ll_flush_ctx(inode));
+        case LL_IOC_GETFACL: {
+                struct rmtacl_ioctl_data ioc;
+
+                if (copy_from_user(&ioc, (void *)arg, sizeof(ioc)))
+                        RETURN(-EFAULT);
+
+                RETURN(ll_ioctl_getfacl(inode, &ioc));
+        }
+        case LL_IOC_SETFACL: {
+                struct rmtacl_ioctl_data ioc;
+
+                if (copy_from_user(&ioc, (void *)arg, sizeof(ioc)))
+                        RETURN(-EFAULT);
+
+                RETURN(ll_ioctl_setfacl(inode, &ioc));
+        }
+        default: {
+                int err;
+
+                if (LLIOC_STOP == 
+                    ll_iocontrol_call(inode, file, cmd, arg, &err))
+                        RETURN(err);
+
+                RETURN(obd_iocontrol(cmd, ll_i2dtexp(inode), 0, NULL,
                                      (void *)arg));
         }
+        }
 }
 
 loff_t ll_file_seek(struct file *file, loff_t offset, int origin)
@@ -2145,14 +2324,13 @@ loff_t ll_file_seek(struct file *file, loff_t offset, int origin)
         struct lov_stripe_md *lsm = lli->lli_smd;
         loff_t retval;
         ENTRY;
-        retval = offset + ((origin == 2) ? inode->i_size :
+        retval = offset + ((origin == 2) ? i_size_read(inode) :
                            (origin == 1) ? file->f_pos : 0);
         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), to=%Lu=%#Lx(%s)\n",
                inode->i_ino, inode->i_generation, inode, retval, retval,
                origin == 2 ? "SEEK_END": origin == 1 ? "SEEK_CUR" : "SEEK_SET");
-        ll_vfs_ops_tally(ll_i2sbi(inode), VFS_OPS_SEEK);
-        lprocfs_counter_incr(ll_i2sbi(inode)->ll_stats, LPROC_LL_LLSEEK);
-        
+        ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_LLSEEK, 1);
+
         if (origin == 2) { /* SEEK_END */
                 int nonblock = 0, rc;
 
@@ -2166,7 +2344,7 @@ loff_t ll_file_seek(struct file *file, loff_t offset, int origin)
                 }
 
                 ll_inode_size_lock(inode, 0);
-                offset += inode->i_size;
+                offset += i_size_read(inode);
                 ll_inode_size_unlock(inode, 0);
         } else if (origin == 1) { /* SEEK_CUR */
                 offset += file->f_pos;
@@ -2183,7 +2361,7 @@ loff_t ll_file_seek(struct file *file, loff_t offset, int origin)
                 }
                 retval = offset;
         }
-
+        
         RETURN(retval);
 }
 
@@ -2192,14 +2370,13 @@ int ll_fsync(struct file *file, struct dentry *dentry, int data)
         struct inode *inode = dentry->d_inode;
         struct ll_inode_info *lli = ll_i2info(inode);
         struct lov_stripe_md *lsm = lli->lli_smd;
-        struct ll_fid fid;
         struct ptlrpc_request *req;
+        struct obd_capa *oc;
         int rc, err;
         ENTRY;
         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
                inode->i_generation, inode);
-        ll_vfs_ops_tally(ll_i2sbi(inode), VFS_OPS_FSYNC);
-        lprocfs_counter_incr(ll_i2sbi(inode)->ll_stats, LPROC_LL_FSYNC);
+        ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_FSYNC, 1);
 
         /* fsync's caller has already called _fdata{sync,write}, we want
          * that IO to finish before calling the osc and mdc sync methods */
@@ -2217,29 +2394,36 @@ int ll_fsync(struct file *file, struct dentry *dentry, int data)
                         rc = err;
         }
 
-        ll_inode2fid(&fid, inode);
-        err = mdc_sync(ll_i2sbi(inode)->ll_mdc_exp, &fid, &req);
+        oc = ll_mdscapa_get(inode);
+        err = md_sync(ll_i2sbi(inode)->ll_md_exp, ll_inode2fid(inode), oc,
+                      &req);
+        capa_put(oc);
         if (!rc)
                 rc = err;
         if (!err)
                 ptlrpc_req_finished(req);
 
         if (data && lsm) {
-                struct obdo *oa = obdo_alloc();
-
+                struct obdo *oa;
+                
+                OBDO_ALLOC(oa);
                 if (!oa)
                         RETURN(rc ? rc : -ENOMEM);
 
                 oa->o_id = lsm->lsm_object_id;
-                oa->o_valid = OBD_MD_FLID;
+                oa->o_gr = lsm->lsm_object_gr;
+                oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
                 obdo_from_inode(oa, inode, OBD_MD_FLTYPE | OBD_MD_FLATIME |
-                                           OBD_MD_FLMTIME | OBD_MD_FLCTIME);
+                                           OBD_MD_FLMTIME | OBD_MD_FLCTIME |
+                                           OBD_MD_FLGROUP);
 
-                err = obd_sync(ll_i2sbi(inode)->ll_osc_exp, oa, lsm,
-                               0, OBD_OBJECT_EOF);
+                oc = ll_osscapa_get(inode, CAPA_OPC_OSS_WRITE);
+                err = obd_sync(ll_i2sbi(inode)->ll_dt_exp, oa, lsm,
+                               0, OBD_OBJECT_EOF, oc);
+                capa_put(oc);
                 if (!rc)
                         rc = err;
-                obdo_free(oa);
+                OBDO_FREE(oa);
         }
 
         RETURN(rc);
@@ -2250,18 +2434,23 @@ int ll_file_flock(struct file *file, int cmd, struct file_lock *file_lock)
         struct inode *inode = file->f_dentry->d_inode;
         struct ll_sb_info *sbi = ll_i2sbi(inode);
         struct ldlm_res_id res_id =
-                    { .name = {inode->i_ino, inode->i_generation, LDLM_FLOCK} };
+                { .name = { fid_seq(ll_inode2fid(inode)),
+                            fid_oid(ll_inode2fid(inode)),
+                            fid_ver(ll_inode2fid(inode)),
+                            LDLM_FLOCK} };
+        struct ldlm_enqueue_info einfo = { LDLM_FLOCK, 0, NULL,
+                ldlm_flock_completion_ast, NULL, file_lock };
         struct lustre_handle lockh = {0};
         ldlm_policy_data_t flock;
-        ldlm_mode_t mode = 0;
         int flags = 0;
         int rc;
         ENTRY;
 
         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu file_lock=%p\n",
                inode->i_ino, file_lock);
-        ll_vfs_ops_tally(ll_i2sbi(inode), VFS_OPS_FLOCK);
 
+        ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_FLOCK, 1);
         if (file_lock->fl_flags & FL_FLOCK) {
                 LASSERT((cmd == F_SETLKW) || (cmd == F_SETLK));
                 /* set missing params for flock() calls */
@@ -2274,7 +2463,7 @@ int ll_file_flock(struct file *file, int cmd, struct file_lock *file_lock)
 
         switch (file_lock->fl_type) {
         case F_RDLCK:
-                mode = LCK_PR;
+                einfo.ei_mode = LCK_PR;
                 break;
         case F_UNLCK:
                 /* An unlock request may or may not have any relation to
@@ -2285,10 +2474,10 @@ int ll_file_flock(struct file *file, int cmd, struct file_lock *file_lock)
                  * information that is given with a normal read or write record
                  * lock request. To avoid creating another ldlm unlock (cancel)
                  * message we'll treat a LCK_NL flock request as an unlock. */
-                mode = LCK_NL;
+                einfo.ei_mode = LCK_NL;
                 break;
         case F_WRLCK:
-                mode = LCK_PW;
+                einfo.ei_mode = LCK_PW;
                 break;
         default:
                 CERROR("unknown fcntl lock type: %d\n", file_lock->fl_type);
@@ -2315,7 +2504,7 @@ int ll_file_flock(struct file *file, int cmd, struct file_lock *file_lock)
                 flags = LDLM_FL_TEST_LOCK;
                 /* Save the old mode so that if the mode in the lock changes we
                  * can decrement the appropriate reader or writer refcount. */
-                file_lock->fl_type = mode;
+                file_lock->fl_type = einfo.ei_mode;
                 break;
         default:
                 CERROR("unknown fcntl lock command: %d\n", cmd);
@@ -2324,16 +2513,15 @@ int ll_file_flock(struct file *file, int cmd, struct file_lock *file_lock)
 
         CDEBUG(D_DLMTRACE, "inode=%lu, pid=%u, flags=%#x, mode=%u, "
                "start="LPU64", end="LPU64"\n", inode->i_ino, flock.l_flock.pid,
-               flags, mode, flock.l_flock.start, flock.l_flock.end);
+               flags, einfo.ei_mode, flock.l_flock.start, flock.l_flock.end);
 
-        rc = ldlm_cli_enqueue(sbi->ll_mdc_exp, NULL, res_id,
-                              LDLM_FLOCK, &flock, mode, &flags, NULL,
-                              ldlm_flock_completion_ast, NULL, file_lock,
-                              NULL, 0, NULL, &lockh, 0);
+        rc = ldlm_cli_enqueue(sbi->ll_md_exp, NULL, &einfo, &res_id,
+                              &flock, &flags, NULL, 0, NULL, &lockh, 0);
         if ((file_lock->fl_flags & FL_FLOCK) && (rc == 0))
                 ll_flock_lock_file_wait(file, file_lock, (cmd == F_SETLKW));
 #ifdef HAVE_F_OP_FLOCK
-        if ((file_lock->fl_flags & FL_POSIX) &&(rc == 0))
+        if ((file_lock->fl_flags & FL_POSIX) && (rc == 0) &&
+            !(flags & LDLM_FL_TEST_LOCK))
                 posix_lock_file_wait(file, file_lock);
 #endif
 
@@ -2350,24 +2538,20 @@ int ll_file_noflock(struct file *file, int cmd, struct file_lock *file_lock)
 int ll_have_md_lock(struct inode *inode, __u64 bits)
 {
         struct lustre_handle lockh;
-        struct ldlm_res_id res_id = { .name = {0} };
-        struct obd_device *obddev;
         ldlm_policy_data_t policy = { .l_inodebits = {bits}};
+        struct lu_fid *fid;
         int flags;
         ENTRY;
 
         if (!inode)
                RETURN(0);
 
-        obddev = ll_i2mdcexp(inode)->exp_obd;
-        res_id.name[0] = inode->i_ino;
-        res_id.name[1] = inode->i_generation;
-
-        CDEBUG(D_INFO, "trying to match res "LPU64"\n", res_id.name[0]);
+        fid = &ll_i2info(inode)->lli_fid;
+        CDEBUG(D_INFO, "trying to match res "DFID"\n", PFID(fid));
 
         flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_CBPENDING | LDLM_FL_TEST_LOCK;
-        if (ldlm_lock_match(obddev->obd_namespace, flags, &res_id, LDLM_IBITS,
-                            &policy, LCK_CR|LCK_CW|LCK_PR, &lockh)) {
+        if (md_lock_match(ll_i2mdexp(inode), flags, fid, LDLM_IBITS, &policy,
+                          LCK_CR|LCK_CW|LCK_PR, &lockh)) {
                 RETURN(1);
         }
 
@@ -2399,6 +2583,7 @@ int ll_inode_revalidate_it(struct dentry *dentry, struct lookup_intent *it)
 {
         struct inode *inode = dentry->d_inode;
         struct ptlrpc_request *req = NULL;
+        struct ll_sb_info *sbi;
         struct obd_export *exp;
         int rc;
         ENTRY;
@@ -2407,32 +2592,38 @@ int ll_inode_revalidate_it(struct dentry *dentry, struct lookup_intent *it)
                 CERROR("REPORT THIS LINE TO PETER\n");
                 RETURN(0);
         }
+        sbi = ll_i2sbi(inode);
+
         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p),name=%s\n",
                inode->i_ino, inode->i_generation, inode, dentry->d_name.name);
-#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,5,0))
-        lprocfs_counter_incr(ll_i2sbi(inode)->ll_stats, LPROC_LL_REVALIDATE);
-#endif
 
-        exp = ll_i2mdcexp(inode);
+        exp = ll_i2mdexp(inode);
 
         if (exp->exp_connect_flags & OBD_CONNECT_ATTRFID) {
                 struct lookup_intent oit = { .it_op = IT_GETATTR };
-                struct mdc_op_data op_data;
+                struct md_op_data *op_data;
 
                 /* Call getattr by fid, so do not provide name at all. */
-                ll_prepare_mdc_op_data(&op_data, dentry->d_parent->d_inode,
-                                       dentry->d_inode, NULL, 0, 0);
-                rc = mdc_intent_lock(exp, &op_data, NULL, 0,
-                                     /* we are not interested in name
-                                        based lookup */
-                                     &oit, 0, &req,
-                                     ll_mdc_blocking_ast, 0);
+                op_data = ll_prep_md_op_data(NULL, dentry->d_parent->d_inode,
+                                             dentry->d_inode, NULL, 0, 0,
+                                             LUSTRE_OPC_ANY, NULL);
+                if (IS_ERR(op_data))
+                        RETURN(PTR_ERR(op_data));
+
+                oit.it_flags |= O_CHECK_STALE;
+                rc = md_intent_lock(exp, op_data, NULL, 0,
+                                    /* we are not interested in name
+                                       based lookup */
+                                    &oit, 0, &req,
+                                    ll_md_blocking_ast, 0);
+                ll_finish_md_op_data(op_data);
+                oit.it_flags &= ~O_CHECK_STALE;
                 if (rc < 0) {
                         rc = ll_inode_revalidate_fini(inode, rc);
                         GOTO (out, rc);
                 }
-                
-                rc = revalidate_it_finish(req, DLM_REPLY_REC_OFF, &oit, dentry);
+
+                rc = ll_revalidate_it_finish(req, DLM_REPLY_REC_OFF, &oit, dentry);
                 if (rc != 0) {
                         ll_intent_release(&oit);
                         GOTO(out, rc);
@@ -2450,45 +2641,49 @@ int ll_inode_revalidate_it(struct dentry *dentry, struct lookup_intent *it)
 
                 ll_lookup_finish_locks(&oit, dentry);
         } else if (!ll_have_md_lock(dentry->d_inode,
-                                  MDS_INODELOCK_UPDATE|MDS_INODELOCK_LOOKUP)) {
+                                    MDS_INODELOCK_UPDATE)) {
                 struct ll_sb_info *sbi = ll_i2sbi(dentry->d_inode);
-                struct ll_fid fid;
                 obd_valid valid = OBD_MD_FLGETATTR;
+                struct obd_capa *oc;
                 int ealen = 0;
 
                 if (S_ISREG(inode->i_mode)) {
                         rc = ll_get_max_mdsize(sbi, &ealen);
-                        if (rc) 
-                                RETURN(rc); 
+                        if (rc)
+                                RETURN(rc);
                         valid |= OBD_MD_FLEASIZE | OBD_MD_FLMODEASIZE;
                 }
-                ll_inode2fid(&fid, inode);
-                rc = mdc_getattr(sbi->ll_mdc_exp, &fid, valid, ealen, &req);
+                /* Once OBD_CONNECT_ATTRFID is not supported, we can't find one
+                 * capa for this inode. Because we only keep capas of dirs
+                 * fresh. */
+                oc = ll_mdscapa_get(inode);
+                rc = md_getattr(sbi->ll_md_exp, ll_inode2fid(inode), oc, valid,
+                                ealen, &req);
+                capa_put(oc);
                 if (rc) {
                         rc = ll_inode_revalidate_fini(inode, rc);
                         RETURN(rc);
                 }
 
-                rc = ll_prep_inode(sbi->ll_osc_exp, &inode, req, REPLY_REC_OFF,
+                rc = ll_prep_inode(&inode, req, REPLY_REC_OFF,
                                    NULL);
                 if (rc)
                         GOTO(out, rc);
         }
 
         /* if object not yet allocated, don't validate size */
-        if (ll_i2info(inode)->lli_smd == NULL) 
+        if (ll_i2info(inode)->lli_smd == NULL)
                 GOTO(out, rc = 0);
 
         /* ll_glimpse_size will prefer locally cached writes if they extend
          * the file */
         rc = ll_glimpse_size(inode, 0);
-
+        EXIT;
 out:
         ptlrpc_req_finished(req);
-        RETURN(rc);
+        return rc;
 }
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
 int ll_getattr_it(struct vfsmount *mnt, struct dentry *de,
                   struct lookup_intent *it, struct kstat *stat)
 {
@@ -2496,7 +2691,7 @@ int ll_getattr_it(struct vfsmount *mnt, struct dentry *de,
         int res = 0;
 
         res = ll_inode_revalidate_it(de, it);
-        lprocfs_counter_incr(ll_i2sbi(inode)->ll_stats, LPROC_LL_GETATTR);
+        ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_GETATTR, 1);
 
         if (res)
                 return res;
@@ -2514,11 +2709,11 @@ int ll_getattr_it(struct vfsmount *mnt, struct dentry *de,
 #ifdef HAVE_INODE_BLKSIZE
         stat->blksize = inode->i_blksize;
 #else
-        stat->blksize = 1<<inode->i_blkbits;
+        stat->blksize = 1 << inode->i_blkbits;
 #endif
 
         ll_inode_size_lock(inode, 0);
-        stat->size = inode->i_size;
+        stat->size = i_size_read(inode);
         stat->blocks = inode->i_blocks;
         ll_inode_size_unlock(inode, 0);
 
@@ -2528,10 +2723,8 @@ int ll_getattr(struct vfsmount *mnt, struct dentry *de, struct kstat *stat)
 {
         struct lookup_intent it = { .it_op = IT_GETATTR };
 
-        ll_vfs_ops_tally(ll_i2sbi(de->d_inode), VFS_OPS_GETATTR);
         return ll_getattr_it(mnt, de, &it, stat);
 }
-#endif
 
 static
 int lustre_check_acl(struct inode *inode, int mask)
@@ -2563,23 +2756,25 @@ int ll_inode_permission(struct inode *inode, int mask, struct nameidata *nd)
 {
         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), mask %o\n",
                inode->i_ino, inode->i_generation, inode, mask);
-
-        ll_vfs_ops_tally(ll_i2sbi(inode), VFS_OPS_INODE_PERMISSION);
+        if (ll_i2sbi(inode)->ll_flags & LL_SBI_RMT_CLIENT)
+                return lustre_check_remote_perm(inode, mask);
+        
+        ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_INODE_PERM, 1);
         return generic_permission(inode, mask, lustre_check_acl);
 }
 #else
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
 int ll_inode_permission(struct inode *inode, int mask, struct nameidata *nd)
-#else
-int ll_inode_permission(struct inode *inode, int mask)
-#endif
 {
         int mode = inode->i_mode;
         int rc;
 
         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), mask %o\n",
                inode->i_ino, inode->i_generation, inode, mask);
-        ll_vfs_ops_tally(ll_i2sbi(inode), VFS_OPS_INODE_PERMISSION);
+
+        if (ll_i2sbi(inode)->ll_flags & LL_SBI_RMT_CLIENT)
+                return lustre_check_remote_perm(inode, mask);
+
+        ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_INODE_PERM, 1);
 
         if ((mask & MAY_WRITE) && IS_RDONLY(inode) &&
             (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)))
@@ -2614,11 +2809,12 @@ check_capabilities:
         if (capable(CAP_DAC_READ_SEARCH) && ((mask == MAY_READ) ||
             (S_ISDIR(inode->i_mode) && !(mask & MAY_WRITE))))
                 return 0;
-
+        
         return -EACCES;
 }
 #endif
 
+/* -o localflock - only provides locally consistent flock locks */
 struct file_operations ll_file_operations = {
         .read           = ll_file_read,
         .write          = ll_file_write,
@@ -2627,14 +2823,8 @@ struct file_operations ll_file_operations = {
         .release        = ll_file_release,
         .mmap           = ll_file_mmap,
         .llseek         = ll_file_seek,
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
         .sendfile       = ll_file_sendfile,
-#endif
         .fsync          = ll_fsync,
-#ifdef HAVE_F_OP_FLOCK
-        .flock          = ll_file_noflock,
-#endif
-        .lock           = ll_file_noflock
 };
 
 struct file_operations ll_file_operations_flock = {
@@ -2645,9 +2835,7 @@ struct file_operations ll_file_operations_flock = {
         .release        = ll_file_release,
         .mmap           = ll_file_mmap,
         .llseek         = ll_file_seek,
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
         .sendfile       = ll_file_sendfile,
-#endif
         .fsync          = ll_fsync,
 #ifdef HAVE_F_OP_FLOCK
         .flock          = ll_file_flock,
@@ -2655,6 +2843,22 @@ struct file_operations ll_file_operations_flock = {
         .lock           = ll_file_flock
 };
 
+/* These are for -o noflock - to return ENOSYS on flock calls */
+struct file_operations ll_file_operations_noflock = {
+        .read           = ll_file_read,
+        .write          = ll_file_write,
+        .ioctl          = ll_file_ioctl,
+        .open           = ll_file_open,
+        .release        = ll_file_release,
+        .mmap           = ll_file_mmap,
+        .llseek         = ll_file_seek,
+        .sendfile       = ll_file_sendfile,
+        .fsync          = ll_fsync,
+#ifdef HAVE_F_OP_FLOCK
+        .flock          = ll_file_noflock,
+#endif
+        .lock           = ll_file_noflock
+};
 
 struct inode_operations ll_file_inode_operations = {
 #ifdef LUSTRE_KERNEL_VERSION
@@ -2662,11 +2866,7 @@ struct inode_operations ll_file_inode_operations = {
 #endif
         .setattr        = ll_setattr,
         .truncate       = ll_truncate,
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
         .getattr        = ll_getattr,
-#else
-        .revalidate_it  = ll_inode_revalidate_it,
-#endif
         .permission     = ll_inode_permission,
         .setxattr       = ll_setxattr,
         .getxattr       = ll_getxattr,
@@ -2674,3 +2874,102 @@ struct inode_operations ll_file_inode_operations = {
         .removexattr    = ll_removexattr,
 };
 
+/* dynamic ioctl number support routins */
+static struct llioc_ctl_data {
+        struct rw_semaphore ioc_sem;
+        struct list_head    ioc_head;
+} llioc = { 
+        __RWSEM_INITIALIZER(llioc.ioc_sem), 
+        CFS_LIST_HEAD_INIT(llioc.ioc_head)
+};
+
+
+struct llioc_data {
+        struct list_head        iocd_list;
+        unsigned int            iocd_size;
+        llioc_callback_t        iocd_cb;
+        unsigned int            iocd_count;
+        unsigned int            iocd_cmd[0];
+};
+
+void *ll_iocontrol_register(llioc_callback_t cb, int count, unsigned int *cmd)
+{
+        unsigned int size;
+        struct llioc_data *in_data = NULL;
+        ENTRY;
+
+        if (cb == NULL || cmd == NULL ||
+            count > LLIOC_MAX_CMD || count < 0)
+                RETURN(NULL);
+
+        size = sizeof(*in_data) + count * sizeof(unsigned int);
+        OBD_ALLOC(in_data, size);
+        if (in_data == NULL)
+                RETURN(NULL);
+
+        memset(in_data, 0, sizeof(*in_data));
+        in_data->iocd_size = size;
+        in_data->iocd_cb = cb;
+        in_data->iocd_count = count;
+        memcpy(in_data->iocd_cmd, cmd, sizeof(unsigned int) * count);
+
+        down_write(&llioc.ioc_sem);
+        list_add_tail(&in_data->iocd_list, &llioc.ioc_head);
+        up_write(&llioc.ioc_sem);
+
+        RETURN(in_data);
+}
+
+void ll_iocontrol_unregister(void *magic)
+{
+        struct llioc_data *tmp;
+
+        if (magic == NULL)
+                return;
+
+        down_write(&llioc.ioc_sem);
+        list_for_each_entry(tmp, &llioc.ioc_head, iocd_list) {
+                if (tmp == magic) {
+                        unsigned int size = tmp->iocd_size;
+
+                        list_del(&tmp->iocd_list);
+                        up_write(&llioc.ioc_sem);
+
+                        OBD_FREE(tmp, size);
+                        return;
+                }
+        }
+        up_write(&llioc.ioc_sem);
+
+        CWARN("didn't find iocontrol register block with magic: %p\n", magic);
+}
+
+EXPORT_SYMBOL(ll_iocontrol_register);
+EXPORT_SYMBOL(ll_iocontrol_unregister);
+
+enum llioc_iter ll_iocontrol_call(struct inode *inode, struct file *file, 
+                        unsigned int cmd, unsigned long arg, int *rcp)
+{
+        enum llioc_iter ret = LLIOC_CONT;
+        struct llioc_data *data;
+        int rc = -EINVAL, i;
+
+        down_read(&llioc.ioc_sem);
+        list_for_each_entry(data, &llioc.ioc_head, iocd_list) {
+                for (i = 0; i < data->iocd_count; i++) {
+                        if (cmd != data->iocd_cmd[i]) 
+                                continue;
+
+                        ret = data->iocd_cb(inode, file, cmd, arg, data, &rc);
+                        break;
+                }
+
+                if (ret == LLIOC_STOP)
+                        break;
+        }
+        up_read(&llioc.ioc_sem);
+
+        if (rcp)
+                *rcp = rc;
+        return ret;
+}