1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
5 * Lustre Metadata Target (mdt) open/close file handling
7 * Copyright (C) 2002-2006 Cluster File Systems, Inc.
8 * Author: Huang Hua <huanghua@clusterfs.com>
10 * This file is part of the Lustre file system, http://www.lustre.org
11 * Lustre is a trademark of Cluster File Systems, Inc.
13 * You may have signed or agreed to another license before downloading
14 * this software. If so, you are bound by the terms and conditions
15 * of that agreement, and the following does not apply to you. See the
16 * LICENSE file included with this distribution for more information.
18 * If you did not agree to a different license, then this copy of Lustre
19 * is open source software; you can redistribute it and/or modify it
20 * under the terms of version 2 of the GNU General Public License as
21 * published by the Free Software Foundation.
23 * In either case, Lustre is distributed in the hope that it will be
24 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
25 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 * license text for more details.
30 # define EXPORT_SYMTAB
32 #define DEBUG_SUBSYSTEM S_MDS
34 #include <linux/lustre_acl.h>
35 #include <lustre_mds.h>
36 #include "mdt_internal.h"
38 /* we do nothing because we do not have refcount now */
39 static void mdt_mfd_get(void *mfdp)
43 /* Create a new mdt_file_data struct, initialize it,
44 * and insert it to global hash table */
45 static struct mdt_file_data *mdt_mfd_new(void)
47 struct mdt_file_data *mfd;
52 INIT_LIST_HEAD(&mfd->mfd_handle.h_link);
53 INIT_LIST_HEAD(&mfd->mfd_list);
54 class_handle_hash(&mfd->mfd_handle, mdt_mfd_get);
59 /* Find the mfd pointed to by handle in global hash table. */
60 static struct mdt_file_data *mdt_handle2mfd(const struct lustre_handle *handle)
63 LASSERT(handle != NULL);
64 RETURN(class_handle2object(handle->cookie));
68 static void mdt_mfd_free(struct mdt_file_data *mfd)
70 LASSERT(list_empty(&mfd->mfd_handle.h_link));
71 LASSERT(list_empty(&mfd->mfd_list));
75 static int mdt_create_data_obj(struct mdt_thread_info *info,
76 struct mdt_object *p, struct mdt_object *o)
78 struct md_attr *ma = &info->mti_attr;
79 struct mdt_reint_record *mrr = &info->mti_rr;
81 return mdo_create_data_object(info->mti_ctxt, mdt_object_child(p),
82 mdt_object_child(o), mrr->rr_eadata,
83 mrr->rr_eadatalen, ma);
86 static int mdt_mfd_open(struct mdt_thread_info *info,
89 int flags, int created)
91 struct mdt_export_data *med;
92 struct mdt_file_data *mfd;
93 struct mdt_body *repbody;
94 struct md_attr *ma = &info->mti_attr;
95 struct lu_attr *la = &ma->ma_attr;
96 struct ptlrpc_request *req = mdt_info_req(info);
97 struct ldlm_reply *ldlm_rep;
99 int isreg, isdir, islnk;
102 med = &req->rq_export->exp_mdt_data;
103 repbody = req_capsule_server_get(&info->mti_pill, &RMF_MDT_BODY);
106 /* we have to get attr & lov ea for this object*/
107 rc = mo_attr_get(info->mti_ctxt, mdt_object_child(o), ma);
111 isreg = S_ISREG(la->la_mode);
112 isdir = S_ISDIR(la->la_mode);
113 islnk = S_ISLNK(la->la_mode);
114 if (ma->ma_valid & MA_INODE)
115 mdt_pack_attr2body(repbody, la, mdt_object_fid(o));
117 /* if we are following a symlink, don't open */
118 if (islnk || (!isreg && !isdir &&
119 (req->rq_export->exp_connect_flags & OBD_CONNECT_NODEVOH))) {
120 info->mti_trans_flags |= MDT_NONEED_TANSNO;
123 /* FIXME:maybe this can be done earlier? */
125 if (flags & (MDS_OPEN_CREAT | FMODE_WRITE)) {
126 /* we are trying to create or
127 * write an existing dir. */
130 } else if (flags & MDS_OPEN_DIRECTORY)
134 if (!isreg && !isdir &&
135 (req->rq_export->exp_connect_flags & OBD_CONNECT_NODEVOH))
136 /* If client supports this, do not return open handle
137 * for special nodes */
140 if ((isreg) && !(ma->ma_valid & MA_LOV)) {
141 /*No EA, check whether it is will set regEA and dirEA
142 *since in above attr get, these size might be zero,
143 *so reset it, to retrieve the MD after create obj*/
144 ma->ma_lmm_size = req_capsule_get_size(&info->mti_pill,
148 rc = mdt_create_data_obj(info, p, o);
153 CDEBUG(D_INODE, "after open, ma_valid bit = "LPX64"\n", ma->ma_valid);
154 CDEBUG(D_INODE, "after open, lmm_size = %d\n", ma->ma_lmm_size);
155 repbody->eadatasize = 0;
156 repbody->aclsize = 0;
158 if (ma->ma_lmm_size && ma->ma_valid & MA_LOV) {
159 repbody->eadatasize = ma->ma_lmm_size;
161 repbody->valid |= OBD_MD_FLDIREA;
163 repbody->valid |= OBD_MD_FLEASIZE;
166 ldlm_rep = req_capsule_server_get(&info->mti_pill, &RMF_DLM_REP);
168 intent_set_disposition(ldlm_rep, DISP_OPEN_OPEN);
169 /*FIXME: should determine the offset dynamicly,
170 *did not get ACL before shrink*/
171 lustre_shrink_reply(req, 2, repbody->eadatasize, 1);
172 lustre_shrink_reply(req, repbody->eadatasize ? 3 : 2, repbody->aclsize,
175 if (flags & FMODE_WRITE) {
176 /*mds_get_write_access*/
177 } else if (flags & MDS_FMODE_EXEC) {
178 /*mds_deny_write_access*/
181 /* (1) client wants transno when open to keep a ref count for replay;
182 * see after_reply() and mdc_close_commit();
183 * (2) we need to record the transaction related stuff onto disk;
184 * But, question is: when do a rean only open, do we still need transno?
187 struct txn_param txn;
189 struct dt_device *dt = info->mti_mdt->mdt_bottom;
193 th = dt->dd_ops->dt_trans_start(info->mti_ctxt, dt, &txn);
195 dt->dd_ops->dt_trans_stop(info->mti_ctxt, th);
202 /* keep a reference on this object for this open,
203 * and is released by mdt_mfd_close() */
204 mdt_object_get(info->mti_ctxt, o);
206 mfd->mfd_mode = flags;
208 mfd->mfd_xid = mdt_info_req(info)->rq_xid;
210 spin_lock(&med->med_open_lock);
211 list_add(&mfd->mfd_list, &med->med_open_head);
212 spin_unlock(&med->med_open_lock);
214 repbody->handle.cookie = mfd->mfd_handle.h_cookie;
221 int mdt_open_by_fid(struct mdt_thread_info* info, const struct lu_fid *fid,
224 struct mdt_object *o;
225 struct lu_attr *la = &info->mti_attr.ma_attr;
229 o = mdt_object_find(info->mti_ctxt, info->mti_mdt, fid);
231 if (mdt_object_exists(info->mti_ctxt, &o->mot_obj.mo_lu) > 0) {
232 if (la->la_flags & MDS_OPEN_EXCL &&
233 la->la_flags & MDS_OPEN_CREAT)
236 rc = mdt_mfd_open(info, NULL, o, flags, 0);
239 if (la->la_flags & MDS_OPEN_CREAT) {
240 rc = mo_object_create(info->mti_ctxt,
244 rc = mdt_mfd_open(info, NULL, o, flags, 1);
247 mdt_object_put(info->mti_ctxt, o);
254 int mdt_pin(struct mdt_thread_info* info)
256 struct mdt_body *body;
260 rc = req_capsule_pack(&info->mti_pill);
262 body = req_capsule_client_get(&info->mti_pill, &RMF_MDT_BODY);
263 rc = mdt_open_by_fid(info, &body->fid1, body->flags);
268 int mdt_reint_open(struct mdt_thread_info *info)
270 struct mdt_device *mdt = info->mti_mdt;
271 struct mdt_object *parent;
272 struct mdt_object *child;
273 struct mdt_lock_handle *lh;
274 struct ldlm_reply *ldlm_rep;
275 struct lu_fid *child_fid = &info->mti_tmp_fid1;
276 struct md_attr *ma = &info->mti_attr;
277 struct lu_attr *la = &ma->ma_attr;
280 struct mdt_reint_record *rr = &info->mti_rr;
283 req_capsule_set_size(&info->mti_pill, &RMF_MDT_MD, RCL_SERVER,
284 mdt->mdt_max_mdsize);
286 result = req_capsule_pack(&info->mti_pill);
290 ma->ma_lmm = req_capsule_server_get(&info->mti_pill, &RMF_MDT_MD);
291 ma->ma_lmm_size = req_capsule_get_size(&info->mti_pill,
292 &RMF_MDT_MD, RCL_SERVER);
294 if (rr->rr_name[0] == 0) {
295 /* reint partial remote open */
296 RETURN(mdt_open_by_fid(info, rr->rr_fid1, la->la_flags));
299 /* we now have no resent message, so it must be an intent */
300 /*TODO: remove this and add MDS_CHECK_RESENT if resent enabled*/
301 LASSERT(info->mti_pill.rc_fmt == &RQF_LDLM_INTENT_OPEN);
303 ldlm_rep = req_capsule_server_get(&info->mti_pill, &RMF_DLM_REP);
305 intent_set_disposition(ldlm_rep, DISP_LOOKUP_EXECD);
306 lh = &info->mti_lh[MDT_LH_PARENT];
307 if (!(la->la_flags & MDS_OPEN_CREAT))
308 lh->mlh_mode = LCK_CR;
310 lh->mlh_mode = LCK_EX;
311 parent = mdt_object_find_lock(info, rr->rr_fid1, lh,
312 MDS_INODELOCK_UPDATE);
314 GOTO(out, result = PTR_ERR(parent));
316 result = mdo_lookup(info->mti_ctxt, mdt_object_child(parent),
317 rr->rr_name, child_fid);
318 if (result != 0 && result != -ENOENT)
319 GOTO(out_parent, result);
321 if (result == -ENOENT) {
322 intent_set_disposition(ldlm_rep, DISP_LOOKUP_NEG);
323 if (!(la->la_flags & MDS_OPEN_CREAT))
324 GOTO(out_parent, result);
325 *child_fid = *info->mti_rr.rr_fid2;
326 /* new object will be created. see the following */
328 intent_set_disposition(ldlm_rep, DISP_LOOKUP_POS);
329 if ((la->la_flags & MDS_OPEN_EXCL &&
330 la->la_flags & MDS_OPEN_CREAT))
331 GOTO(out_parent, result = -EEXIST);
334 child = mdt_object_find(info->mti_ctxt, mdt, child_fid);
336 GOTO(out_parent, result = PTR_ERR(child));
338 if (result == -ENOENT) {
339 /* not found and with MDS_OPEN_CREAT: let's create it */
340 result = mdo_create(info->mti_ctxt,
341 mdt_object_child(parent),
343 mdt_object_child(child),
344 rr->rr_tgt, rr->rr_eadata,
345 rr->rr_eadatalen, &info->mti_attr);
346 intent_set_disposition(ldlm_rep, DISP_OPEN_CREATE);
348 GOTO(out_child, result);
353 result = mdt_mfd_open(info, parent, child, la->la_flags, created);
354 GOTO(finish_open, result);
357 if (result != 0 && created) {
358 int rc2 = mdo_unlink(info->mti_ctxt, mdt_object_child(parent),
359 mdt_object_child(child), rr->rr_name,
362 CERROR("error in cleanup of open");
365 mdt_object_put(info->mti_ctxt, child);
367 mdt_object_unlock_put(info, parent, lh, result);
372 void mdt_mfd_close(const struct lu_context *ctxt,
373 struct mdt_file_data *mfd)
377 if (mfd->mfd_mode & FMODE_WRITE) {
378 /*mdt_put_write_access*/
379 } else if (mfd->mfd_mode & MDS_FMODE_EXEC) {
380 /*mdt_allow_write_access*/
383 /* release reference on this object.
384 * it will be destroyed by lower layer if necessary.
386 mdt_object_put(ctxt, mfd->mfd_object);
392 int mdt_close(struct mdt_thread_info *info)
394 struct md_attr *ma = &info->mti_attr;
395 struct mdt_export_data *med;
396 struct mdt_file_data *mfd;
397 struct mdt_object *o;
401 med = &mdt_info_req(info)->rq_export->exp_mdt_data;
403 spin_lock(&med->med_open_lock);
404 mfd = mdt_handle2mfd(&(info->mti_body->handle));
406 spin_unlock(&med->med_open_lock);
407 CDEBUG(D_INODE, "no handle for file close: fid = "DFID3
408 ": cookie = "LPX64"\n", PFID3(&info->mti_body->fid1),
409 info->mti_body->handle.cookie);
412 class_handle_unhash(&mfd->mfd_handle);
413 list_del_init(&mfd->mfd_list);
414 spin_unlock(&med->med_open_lock);
417 ma->ma_lmm = req_capsule_server_get(&info->mti_pill,
419 ma->ma_lmm_size = req_capsule_get_size(&info->mti_pill,
420 &RMF_MDT_MD, RCL_SERVER);
421 rc = mo_attr_get(info->mti_ctxt, mdt_object_child(o), ma);
423 rc = mdt_handle_last_unlink(info, o, ma);
425 mdt_mfd_close(info->mti_ctxt, mfd);
427 mdt_shrink_reply(info);
431 int mdt_done_writing(struct mdt_thread_info *info)
436 req_capsule_set(&info->mti_pill, &RQF_MDS_DONE_WRITING);
437 rc = req_capsule_pack(&info->mti_pill);