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14 * in the LICENSE file that accompanied this code).
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21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
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33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #define DEBUG_SUBSYSTEM S_MDC
39 # include <linux/module.h>
40 # include <linux/kernel.h>
42 #include "../include/obd_class.h"
43 #include "mdc_internal.h"
44 #include "../include/lustre_fid.h"
46 /* mdc_setattr does its own semaphore handling */
47 static int mdc_reint(struct ptlrpc_request *request,
48 struct mdc_rpc_lock *rpc_lock,
53 request->rq_send_state = level;
55 mdc_get_rpc_lock(rpc_lock, NULL);
56 rc = ptlrpc_queue_wait(request);
57 mdc_put_rpc_lock(rpc_lock, NULL);
59 CDEBUG(D_INFO, "error in handling %d\n", rc);
60 else if (!req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY))
66 /* Find and cancel locally locks matched by inode @bits & @mode in the resource
67 * found by @fid. Found locks are added into @cancel list. Returns the amount of
68 * locks added to @cancels list. */
69 int mdc_resource_get_unused(struct obd_export *exp, const struct lu_fid *fid,
70 struct list_head *cancels, ldlm_mode_t mode,
73 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
74 ldlm_policy_data_t policy = {};
75 struct ldlm_res_id res_id;
76 struct ldlm_resource *res;
79 /* Return, i.e. cancel nothing, only if ELC is supported (flag in
80 * export) but disabled through procfs (flag in NS).
82 * This distinguishes from a case when ELC is not supported originally,
83 * when we still want to cancel locks in advance and just cancel them
84 * locally, without sending any RPC. */
85 if (exp_connect_cancelset(exp) && !ns_connect_cancelset(ns))
88 fid_build_reg_res_name(fid, &res_id);
89 res = ldlm_resource_get(exp->exp_obd->obd_namespace,
93 LDLM_RESOURCE_ADDREF(res);
94 /* Initialize ibits lock policy. */
95 policy.l_inodebits.bits = bits;
96 count = ldlm_cancel_resource_local(res, cancels, &policy,
98 LDLM_RESOURCE_DELREF(res);
99 ldlm_resource_putref(res);
103 int mdc_setattr(struct obd_export *exp, struct md_op_data *op_data,
104 void *ea, int ealen, void *ea2, int ea2len,
105 struct ptlrpc_request **request, struct md_open_data **mod)
108 struct ptlrpc_request *req;
109 struct mdc_rpc_lock *rpc_lock;
110 struct obd_device *obd = exp->exp_obd;
114 LASSERT(op_data != NULL);
116 bits = MDS_INODELOCK_UPDATE;
117 if (op_data->op_attr.ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID))
118 bits |= MDS_INODELOCK_LOOKUP;
119 if ((op_data->op_flags & MF_MDC_CANCEL_FID1) &&
120 (fid_is_sane(&op_data->op_fid1)) &&
121 !OBD_FAIL_CHECK(OBD_FAIL_LDLM_BL_CALLBACK_NET))
122 count = mdc_resource_get_unused(exp, &op_data->op_fid1,
123 &cancels, LCK_EX, bits);
124 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
125 &RQF_MDS_REINT_SETATTR);
127 ldlm_lock_list_put(&cancels, l_bl_ast, count);
130 if ((op_data->op_flags & (MF_SOM_CHANGE | MF_EPOCH_OPEN)) == 0)
131 req_capsule_set_size(&req->rq_pill, &RMF_MDT_EPOCH, RCL_CLIENT,
133 req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT, ealen);
134 req_capsule_set_size(&req->rq_pill, &RMF_LOGCOOKIES, RCL_CLIENT,
137 rc = mdc_prep_elc_req(exp, req, MDS_REINT, &cancels, count);
139 ptlrpc_request_free(req);
143 rpc_lock = obd->u.cli.cl_rpc_lock;
145 if (op_data->op_attr.ia_valid & (ATTR_MTIME | ATTR_CTIME))
146 CDEBUG(D_INODE, "setting mtime %ld, ctime %ld\n",
147 LTIME_S(op_data->op_attr.ia_mtime),
148 LTIME_S(op_data->op_attr.ia_ctime));
149 mdc_setattr_pack(req, op_data, ea, ealen, ea2, ea2len);
151 ptlrpc_request_set_replen(req);
152 if (mod && (op_data->op_flags & MF_EPOCH_OPEN) &&
153 req->rq_import->imp_replayable) {
154 LASSERT(*mod == NULL);
156 *mod = obd_mod_alloc();
158 DEBUG_REQ(D_ERROR, req, "Can't allocate md_open_data");
161 req->rq_cb_data = *mod;
162 (*mod)->mod_open_req = req;
163 req->rq_commit_cb = mdc_commit_open;
164 (*mod)->mod_is_create = true;
166 * Take an extra reference on \var mod, it protects \var
167 * mod from being freed on eviction (commit callback is
168 * called despite rq_replay flag).
169 * Will be put on mdc_done_writing().
175 rc = mdc_reint(req, rpc_lock, LUSTRE_IMP_FULL);
177 /* Save the obtained info in the original RPC for the replay case. */
178 if (rc == 0 && (op_data->op_flags & MF_EPOCH_OPEN)) {
179 struct mdt_ioepoch *epoch;
180 struct mdt_body *body;
182 epoch = req_capsule_client_get(&req->rq_pill, &RMF_MDT_EPOCH);
183 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
184 LASSERT(epoch != NULL);
185 LASSERT(body != NULL);
186 epoch->handle = body->handle;
187 epoch->ioepoch = body->ioepoch;
188 req->rq_replay_cb = mdc_replay_open;
189 /** bug 3633, open may be committed and estale answer is not error */
190 } else if (rc == -ESTALE && (op_data->op_flags & MF_SOM_CHANGE)) {
192 } else if (rc == -ERESTARTSYS) {
196 if (rc && req->rq_commit_cb) {
197 /* Put an extra reference on \var mod on error case. */
198 if (mod != NULL && *mod != NULL)
200 req->rq_commit_cb(req);
205 int mdc_create(struct obd_export *exp, struct md_op_data *op_data,
206 const void *data, int datalen, int mode, __u32 uid, __u32 gid,
207 cfs_cap_t cap_effective, __u64 rdev,
208 struct ptlrpc_request **request)
210 struct ptlrpc_request *req;
212 int count, resends = 0;
213 struct obd_import *import = exp->exp_obd->u.cli.cl_import;
214 int generation = import->imp_generation;
217 /* For case if upper layer did not alloc fid, do it now. */
218 if (!fid_is_sane(&op_data->op_fid2)) {
220 * mdc_fid_alloc() may return errno 1 in case of switch to new
221 * sequence, handle this.
223 rc = mdc_fid_alloc(exp, &op_data->op_fid2, op_data);
225 CERROR("Can't alloc new fid, rc %d\n", rc);
232 if ((op_data->op_flags & MF_MDC_CANCEL_FID1) &&
233 (fid_is_sane(&op_data->op_fid1)))
234 count = mdc_resource_get_unused(exp, &op_data->op_fid1,
236 MDS_INODELOCK_UPDATE);
238 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
239 &RQF_MDS_REINT_CREATE_RMT_ACL);
241 ldlm_lock_list_put(&cancels, l_bl_ast, count);
244 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
245 op_data->op_namelen + 1);
246 req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT,
247 data && datalen ? datalen : 0);
249 rc = mdc_prep_elc_req(exp, req, MDS_REINT, &cancels, count);
251 ptlrpc_request_free(req);
256 * mdc_create_pack() fills msg->bufs[1] with name and msg->bufs[2] with
257 * tgt, for symlinks or lov MD data.
259 mdc_create_pack(req, op_data, data, datalen, mode, uid,
260 gid, cap_effective, rdev);
262 ptlrpc_request_set_replen(req);
264 /* ask ptlrpc not to resend on EINPROGRESS since we have our own retry
266 req->rq_no_retry_einprogress = 1;
269 req->rq_generation_set = 1;
270 req->rq_import_generation = generation;
271 req->rq_sent = ktime_get_real_seconds() + resends;
273 level = LUSTRE_IMP_FULL;
275 rc = mdc_reint(req, exp->exp_obd->u.cli.cl_rpc_lock, level);
277 /* Resend if we were told to. */
278 if (rc == -ERESTARTSYS) {
279 level = LUSTRE_IMP_RECOVER;
281 } else if (rc == -EINPROGRESS) {
282 /* Retry create infinitely until succeed or get other
284 ptlrpc_req_finished(req);
287 CDEBUG(D_HA, "%s: resend:%d create on "DFID"/"DFID"\n",
288 exp->exp_obd->obd_name, resends,
289 PFID(&op_data->op_fid1), PFID(&op_data->op_fid2));
291 if (generation == import->imp_generation) {
294 CDEBUG(D_HA, "resend cross eviction\n");
303 int mdc_unlink(struct obd_export *exp, struct md_op_data *op_data,
304 struct ptlrpc_request **request)
307 struct obd_device *obd = class_exp2obd(exp);
308 struct ptlrpc_request *req = *request;
311 LASSERT(req == NULL);
313 if ((op_data->op_flags & MF_MDC_CANCEL_FID1) &&
314 (fid_is_sane(&op_data->op_fid1)) &&
315 !OBD_FAIL_CHECK(OBD_FAIL_LDLM_BL_CALLBACK_NET))
316 count = mdc_resource_get_unused(exp, &op_data->op_fid1,
318 MDS_INODELOCK_UPDATE);
319 if ((op_data->op_flags & MF_MDC_CANCEL_FID3) &&
320 (fid_is_sane(&op_data->op_fid3)) &&
321 !OBD_FAIL_CHECK(OBD_FAIL_LDLM_BL_CALLBACK_NET))
322 count += mdc_resource_get_unused(exp, &op_data->op_fid3,
325 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
326 &RQF_MDS_REINT_UNLINK);
328 ldlm_lock_list_put(&cancels, l_bl_ast, count);
331 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
332 op_data->op_namelen + 1);
334 rc = mdc_prep_elc_req(exp, req, MDS_REINT, &cancels, count);
336 ptlrpc_request_free(req);
340 mdc_unlink_pack(req, op_data);
342 req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
343 obd->u.cli.cl_default_mds_easize);
344 req_capsule_set_size(&req->rq_pill, &RMF_LOGCOOKIES, RCL_SERVER,
345 obd->u.cli.cl_default_mds_cookiesize);
346 ptlrpc_request_set_replen(req);
350 rc = mdc_reint(req, obd->u.cli.cl_rpc_lock, LUSTRE_IMP_FULL);
351 if (rc == -ERESTARTSYS)
356 int mdc_link(struct obd_export *exp, struct md_op_data *op_data,
357 struct ptlrpc_request **request)
360 struct obd_device *obd = exp->exp_obd;
361 struct ptlrpc_request *req;
364 if ((op_data->op_flags & MF_MDC_CANCEL_FID2) &&
365 (fid_is_sane(&op_data->op_fid2)))
366 count = mdc_resource_get_unused(exp, &op_data->op_fid2,
368 MDS_INODELOCK_UPDATE);
369 if ((op_data->op_flags & MF_MDC_CANCEL_FID1) &&
370 (fid_is_sane(&op_data->op_fid1)))
371 count += mdc_resource_get_unused(exp, &op_data->op_fid1,
373 MDS_INODELOCK_UPDATE);
375 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_REINT_LINK);
377 ldlm_lock_list_put(&cancels, l_bl_ast, count);
380 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
381 op_data->op_namelen + 1);
383 rc = mdc_prep_elc_req(exp, req, MDS_REINT, &cancels, count);
385 ptlrpc_request_free(req);
389 mdc_link_pack(req, op_data);
390 ptlrpc_request_set_replen(req);
392 rc = mdc_reint(req, obd->u.cli.cl_rpc_lock, LUSTRE_IMP_FULL);
394 if (rc == -ERESTARTSYS)
400 int mdc_rename(struct obd_export *exp, struct md_op_data *op_data,
401 const char *old, int oldlen, const char *new, int newlen,
402 struct ptlrpc_request **request)
405 struct obd_device *obd = exp->exp_obd;
406 struct ptlrpc_request *req;
409 if ((op_data->op_flags & MF_MDC_CANCEL_FID1) &&
410 (fid_is_sane(&op_data->op_fid1)))
411 count = mdc_resource_get_unused(exp, &op_data->op_fid1,
413 MDS_INODELOCK_UPDATE);
414 if ((op_data->op_flags & MF_MDC_CANCEL_FID2) &&
415 (fid_is_sane(&op_data->op_fid2)))
416 count += mdc_resource_get_unused(exp, &op_data->op_fid2,
418 MDS_INODELOCK_UPDATE);
419 if ((op_data->op_flags & MF_MDC_CANCEL_FID3) &&
420 (fid_is_sane(&op_data->op_fid3)))
421 count += mdc_resource_get_unused(exp, &op_data->op_fid3,
423 MDS_INODELOCK_LOOKUP);
424 if ((op_data->op_flags & MF_MDC_CANCEL_FID4) &&
425 (fid_is_sane(&op_data->op_fid4)))
426 count += mdc_resource_get_unused(exp, &op_data->op_fid4,
430 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
431 &RQF_MDS_REINT_RENAME);
433 ldlm_lock_list_put(&cancels, l_bl_ast, count);
437 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT, oldlen + 1);
438 req_capsule_set_size(&req->rq_pill, &RMF_SYMTGT, RCL_CLIENT, newlen+1);
440 rc = mdc_prep_elc_req(exp, req, MDS_REINT, &cancels, count);
442 ptlrpc_request_free(req);
446 if (exp_connect_cancelset(exp) && req)
447 ldlm_cli_cancel_list(&cancels, count, req, 0);
449 mdc_rename_pack(req, op_data, old, oldlen, new, newlen);
451 req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
452 obd->u.cli.cl_default_mds_easize);
453 req_capsule_set_size(&req->rq_pill, &RMF_LOGCOOKIES, RCL_SERVER,
454 obd->u.cli.cl_default_mds_cookiesize);
455 ptlrpc_request_set_replen(req);
457 rc = mdc_reint(req, obd->u.cli.cl_rpc_lock, LUSTRE_IMP_FULL);
459 if (rc == -ERESTARTSYS)