1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
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20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/cmm/cmm_object.c
38 * Lustre Cluster Metadata Manager (cmm)
40 * Author: Mike Pershin <tappro@clusterfs.com>
44 # define EXPORT_SYMTAB
47 #define DEBUG_SUBSYSTEM S_MDS
49 #include <lustre_fid.h>
50 #include "cmm_internal.h"
51 #include "mdc_internal.h"
54 * Lookup MDS number \a mds by FID \a fid.
56 * \param fid FID of object to find MDS
57 * \param mds mds number to return.
59 int cmm_fld_lookup(struct cmm_device *cm, const struct lu_fid *fid,
60 mdsno_t *mds, const struct lu_env *env)
65 LASSERT(fid_is_sane(fid));
67 rc = fld_client_lookup(cm->cmm_fld, fid_seq(fid), mds,
68 LU_SEQ_RANGE_MDT, env);
70 CERROR("Can't find mds by seq "LPX64", rc %d\n",
75 if (*mds > cm->cmm_tgt_count) {
76 CERROR("Got invalid mdsno: %x (max: %x)\n",
77 *mds, cm->cmm_tgt_count);
80 CDEBUG(D_INFO, "CMM: got MDS %x for sequence: "
81 LPX64"\n", *mds, fid_seq(fid));
91 static const struct md_object_operations cml_mo_ops;
92 static const struct md_dir_operations cml_dir_ops;
93 static const struct lu_object_operations cml_obj_ops;
95 static const struct md_object_operations cmr_mo_ops;
96 static const struct md_dir_operations cmr_dir_ops;
97 static const struct lu_object_operations cmr_obj_ops;
101 * Allocate CMM object.
103 struct lu_object *cmm_object_alloc(const struct lu_env *env,
104 const struct lu_object_header *loh,
105 struct lu_device *ld)
107 const struct lu_fid *fid = &loh->loh_fid;
108 struct lu_object *lo = NULL;
109 struct cmm_device *cd;
116 if (cd->cmm_flags & CMM_INITIALIZED) {
117 /* get object location */
118 rc = cmm_fld_lookup(lu2cmm_dev(ld), fid, &mds, env);
123 * Device is not yet initialized, cmm_object is being created
124 * as part of early bootstrap procedure (it is /ROOT, or /fld,
125 * etc.). Such object *has* to be local.
127 mds = cd->cmm_local_num;
129 /* select the proper set of operations based on object location */
130 if (mds == cd->cmm_local_num) {
131 struct cml_object *clo;
135 lo = &clo->cmm_obj.cmo_obj.mo_lu;
136 lu_object_init(lo, NULL, ld);
137 clo->cmm_obj.cmo_obj.mo_ops = &cml_mo_ops;
138 clo->cmm_obj.cmo_obj.mo_dir_ops = &cml_dir_ops;
139 lo->lo_ops = &cml_obj_ops;
142 struct cmr_object *cro;
146 lo = &cro->cmm_obj.cmo_obj.mo_lu;
147 lu_object_init(lo, NULL, ld);
148 cro->cmm_obj.cmo_obj.mo_ops = &cmr_mo_ops;
149 cro->cmm_obj.cmo_obj.mo_dir_ops = &cmr_dir_ops;
150 lo->lo_ops = &cmr_obj_ops;
158 * Get local child device.
160 static struct lu_device *cml_child_dev(struct cmm_device *d)
162 return &d->cmm_child->md_lu_dev;
168 static void cml_object_free(const struct lu_env *env,
169 struct lu_object *lo)
171 struct cml_object *clo = lu2cml_obj(lo);
177 * Initialize cml_object.
179 static int cml_object_init(const struct lu_env *env, struct lu_object *lo,
180 const struct lu_object_conf *unused)
182 struct cmm_device *cd = lu2cmm_dev(lo->lo_dev);
183 struct lu_device *c_dev;
184 struct lu_object *c_obj;
189 #ifdef HAVE_SPLIT_SUPPORT
190 if (cd->cmm_tgt_count == 0)
191 lu2cml_obj(lo)->clo_split = CMM_SPLIT_DENIED;
193 lu2cml_obj(lo)->clo_split = CMM_SPLIT_UNKNOWN;
195 c_dev = cml_child_dev(cd);
199 c_obj = c_dev->ld_ops->ldo_object_alloc(env,
200 lo->lo_header, c_dev);
202 lu_object_add(lo, c_obj);
212 static int cml_object_print(const struct lu_env *env, void *cookie,
213 lu_printer_t p, const struct lu_object *lo)
215 return (*p)(env, cookie, "[local]");
218 static const struct lu_object_operations cml_obj_ops = {
219 .loo_object_init = cml_object_init,
220 .loo_object_free = cml_object_free,
221 .loo_object_print = cml_object_print
225 * \name CMM local md_object operations.
226 * All of them call just corresponding operations on next layer.
229 static int cml_object_create(const struct lu_env *env,
230 struct md_object *mo,
231 const struct md_op_spec *spec,
232 struct md_attr *attr)
236 rc = mo_object_create(env, md_object_next(mo), spec, attr);
240 static int cml_permission(const struct lu_env *env,
241 struct md_object *p, struct md_object *c,
242 struct md_attr *attr, int mask)
246 rc = mo_permission(env, md_object_next(p), md_object_next(c),
251 static int cml_attr_get(const struct lu_env *env, struct md_object *mo,
252 struct md_attr *attr)
256 rc = mo_attr_get(env, md_object_next(mo), attr);
260 static int cml_attr_set(const struct lu_env *env, struct md_object *mo,
261 const struct md_attr *attr)
265 rc = mo_attr_set(env, md_object_next(mo), attr);
269 static int cml_xattr_get(const struct lu_env *env, struct md_object *mo,
270 struct lu_buf *buf, const char *name)
274 rc = mo_xattr_get(env, md_object_next(mo), buf, name);
278 static int cml_readlink(const struct lu_env *env, struct md_object *mo,
283 rc = mo_readlink(env, md_object_next(mo), buf);
287 static int cml_changelog(const struct lu_env *env, enum changelog_rec_type type,
288 int flags, struct md_object *mo)
292 rc = mo_changelog(env, type, flags, md_object_next(mo));
296 static int cml_xattr_list(const struct lu_env *env, struct md_object *mo,
301 rc = mo_xattr_list(env, md_object_next(mo), buf);
305 static int cml_xattr_set(const struct lu_env *env, struct md_object *mo,
306 const struct lu_buf *buf, const char *name,
311 rc = mo_xattr_set(env, md_object_next(mo), buf, name, fl);
315 static int cml_xattr_del(const struct lu_env *env, struct md_object *mo,
320 rc = mo_xattr_del(env, md_object_next(mo), name);
324 static int cml_ref_add(const struct lu_env *env, struct md_object *mo,
325 const struct md_attr *ma)
329 rc = mo_ref_add(env, md_object_next(mo), ma);
333 static int cml_ref_del(const struct lu_env *env, struct md_object *mo,
338 rc = mo_ref_del(env, md_object_next(mo), ma);
342 static int cml_open(const struct lu_env *env, struct md_object *mo,
347 rc = mo_open(env, md_object_next(mo), flags);
351 static int cml_close(const struct lu_env *env, struct md_object *mo,
356 rc = mo_close(env, md_object_next(mo), ma);
360 static int cml_readpage(const struct lu_env *env, struct md_object *mo,
361 const struct lu_rdpg *rdpg)
365 rc = mo_readpage(env, md_object_next(mo), rdpg);
369 static int cml_capa_get(const struct lu_env *env, struct md_object *mo,
370 struct lustre_capa *capa, int renewal)
374 rc = mo_capa_get(env, md_object_next(mo), capa, renewal);
378 static int cml_path(const struct lu_env *env, struct md_object *mo,
379 char *path, int pathlen, __u64 *recno, int *linkno)
383 rc = mo_path(env, md_object_next(mo), path, pathlen, recno, linkno);
387 static int cml_file_lock(const struct lu_env *env, struct md_object *mo,
388 struct lov_mds_md *lmm, struct ldlm_extent *extent,
389 struct lustre_handle *lockh)
393 rc = mo_file_lock(env, md_object_next(mo), lmm, extent, lockh);
397 static int cml_file_unlock(const struct lu_env *env, struct md_object *mo,
398 struct lov_mds_md *lmm, struct lustre_handle *lockh)
402 rc = mo_file_unlock(env, md_object_next(mo), lmm, lockh);
406 static int cml_object_sync(const struct lu_env *env, struct md_object *mo)
410 rc = mo_object_sync(env, md_object_next(mo));
414 static dt_obj_version_t cml_version_get(const struct lu_env *env,
415 struct md_object *mo)
417 return mo_version_get(env, md_object_next(mo));
420 static void cml_version_set(const struct lu_env *env, struct md_object *mo,
421 dt_obj_version_t version)
423 return mo_version_set(env, md_object_next(mo), version);
426 static const struct md_object_operations cml_mo_ops = {
427 .moo_permission = cml_permission,
428 .moo_attr_get = cml_attr_get,
429 .moo_attr_set = cml_attr_set,
430 .moo_xattr_get = cml_xattr_get,
431 .moo_xattr_list = cml_xattr_list,
432 .moo_xattr_set = cml_xattr_set,
433 .moo_xattr_del = cml_xattr_del,
434 .moo_object_create = cml_object_create,
435 .moo_ref_add = cml_ref_add,
436 .moo_ref_del = cml_ref_del,
437 .moo_open = cml_open,
438 .moo_close = cml_close,
439 .moo_readpage = cml_readpage,
440 .moo_readlink = cml_readlink,
441 .moo_changelog = cml_changelog,
442 .moo_capa_get = cml_capa_get,
443 .moo_object_sync = cml_object_sync,
444 .moo_version_get = cml_version_get,
445 .moo_version_set = cml_version_set,
446 .moo_path = cml_path,
447 .moo_file_lock = cml_file_lock,
448 .moo_file_unlock = cml_file_unlock,
453 * \name CMM local md_dir_operations.
457 * cml lookup object fid by name.
458 * This returns only FID by name.
460 static int cml_lookup(const struct lu_env *env, struct md_object *mo_p,
461 const struct lu_name *lname, struct lu_fid *lf,
462 struct md_op_spec *spec)
467 #ifdef HAVE_SPLIT_SUPPORT
468 if (spec != NULL && spec->sp_ck_split) {
469 rc = cmm_split_check(env, mo_p, lname->ln_name);
474 rc = mdo_lookup(env, md_object_next(mo_p), lname, lf, spec);
480 * Helper to return lock mode. Used in split cases only.
482 static mdl_mode_t cml_lock_mode(const struct lu_env *env,
483 struct md_object *mo, mdl_mode_t lm)
485 int rc = MDL_MINMODE;
488 #ifdef HAVE_SPLIT_SUPPORT
489 rc = cmm_split_access(env, mo, lm);
496 * Create operation for cml.
497 * Objects are local, but split can happen.
498 * If split is not needed this will call next layer mdo_create().
500 * \param mo_p Parent directory. Local object.
501 * \param lname name of file to create.
502 * \param mo_c Child object. It has no real inode yet.
503 * \param spec creation specification.
504 * \param ma child object attributes.
506 static int cml_create(const struct lu_env *env, struct md_object *mo_p,
507 const struct lu_name *lname, struct md_object *mo_c,
508 struct md_op_spec *spec, struct md_attr *ma)
513 #ifdef HAVE_SPLIT_SUPPORT
514 /* Lock mode always should be sane. */
515 LASSERT(spec->sp_cr_mode != MDL_MINMODE);
518 * Sigh... This is long story. MDT may have race with detecting if split
519 * is possible in cmm. We know this race and let it live, because
520 * getting it rid (with some sem or spinlock) will also mean that
521 * PDIROPS for create will not work because we kill parallel work, what
522 * is really bad for performance and makes no sense having PDIROPS. So,
523 * we better allow the race to live, but split dir only if some of
524 * concurrent threads takes EX lock, not matter which one. So that, say,
525 * two concurrent threads may have different lock modes on directory (CW
526 * and EX) and not first one which comes here and see that split is
527 * possible should split the dir, but only that one which has EX
528 * lock. And we do not care that in this case, split may happen a bit
529 * later (when dir size will not be necessarily 64K, but may be a bit
530 * larger). So that, we allow concurrent creates and protect split by EX
533 if (spec->sp_cr_mode == MDL_EX) {
536 * - Try to split \a mo_p upon each create operation.
537 * If split is ok, -ERESTART is returned and current thread
538 * will not peoceed with create. Instead it sends -ERESTART
539 * to client to let it know that correct MDT must be chosen.
540 * \see cmm_split_dir()
542 rc = cmm_split_dir(env, mo_p);
545 * -ERESTART or some split error is returned, we can't
546 * proceed with create.
551 if (spec != NULL && spec->sp_ck_split) {
553 * - Directory is split already. Let the caller know that
554 * it should tell client that directory is split and operation
555 * should repeat to correct MDT.
556 * \see cmm_split_check()
558 rc = cmm_split_check(env, mo_p, lname->ln_name);
564 rc = mdo_create(env, md_object_next(mo_p), lname, md_object_next(mo_c),
568 #ifdef HAVE_SPLIT_SUPPORT
574 /** Call mdo_create_data() on next layer. All objects are local. */
575 static int cml_create_data(const struct lu_env *env, struct md_object *p,
577 const struct md_op_spec *spec,
582 rc = mdo_create_data(env, md_object_next(p), md_object_next(o),
587 /** Call mdo_link() on next layer. All objects are local. */
588 static int cml_link(const struct lu_env *env, struct md_object *mo_p,
589 struct md_object *mo_s, const struct lu_name *lname,
594 rc = mdo_link(env, md_object_next(mo_p), md_object_next(mo_s),
599 /** Call mdo_unlink() on next layer. All objects are local. */
600 static int cml_unlink(const struct lu_env *env, struct md_object *mo_p,
601 struct md_object *mo_c, const struct lu_name *lname,
606 rc = mdo_unlink(env, md_object_next(mo_p), md_object_next(mo_c),
613 * Get mode of object.
614 * Used in both cml and cmr hence can produce RPC to another server.
616 static int cmm_mode_get(const struct lu_env *env, struct md_device *md,
617 const struct lu_fid *lf, struct md_attr *ma,
620 struct md_object *mo_s = md_object_find_slice(env, md, lf);
621 struct cmm_thread_info *cmi;
622 struct md_attr *tmp_ma;
627 RETURN(PTR_ERR(mo_s));
629 if (remote && (lu_object_exists(&mo_s->mo_lu) < 0))
632 cmi = cmm_env_info(env);
633 tmp_ma = &cmi->cmi_ma;
634 tmp_ma->ma_need = MA_INODE;
635 tmp_ma->ma_valid = 0;
636 /* get type from src, can be remote req */
637 rc = mo_attr_get(env, md_object_next(mo_s), tmp_ma);
639 ma->ma_attr.la_mode = tmp_ma->ma_attr.la_mode;
640 ma->ma_attr.la_uid = tmp_ma->ma_attr.la_uid;
641 ma->ma_attr.la_gid = tmp_ma->ma_attr.la_gid;
642 ma->ma_attr.la_flags = tmp_ma->ma_attr.la_flags;
643 ma->ma_attr.la_valid |= LA_MODE | LA_UID | LA_GID | LA_FLAGS;
645 lu_object_put(env, &mo_s->mo_lu);
651 * Set ctime for object.
652 * Used in both cml and cmr hence can produce RPC to another server.
654 static int cmm_rename_ctime(const struct lu_env *env, struct md_device *md,
655 const struct lu_fid *lf, struct md_attr *ma)
657 struct md_object *mo_s = md_object_find_slice(env, md, lf);
662 RETURN(PTR_ERR(mo_s));
664 LASSERT(ma->ma_attr.la_valid & LA_CTIME);
665 /* set ctime to obj, can be remote req */
666 rc = mo_attr_set(env, md_object_next(mo_s), ma);
667 lu_object_put(env, &mo_s->mo_lu);
671 /** Helper to output debug information about rename operation. */
672 static inline void cml_rename_warn(const char *fname,
673 struct md_object *mo_po,
674 struct md_object *mo_pn,
675 const struct lu_fid *lf,
677 struct md_object *mo_t,
682 CWARN("cml_rename failed for %s, should revoke: [mo_po "DFID"] "
683 "[mo_pn "DFID"] [lf "DFID"] [sname %s] [mo_t "DFID"] "
684 "[tname %s] [err %d]\n", fname,
685 PFID(lu_object_fid(&mo_po->mo_lu)),
686 PFID(lu_object_fid(&mo_pn->mo_lu)),
688 PFID(lu_object_fid(&mo_t->mo_lu)),
691 CWARN("cml_rename failed for %s, should revoke: [mo_po "DFID"] "
692 "[mo_pn "DFID"] [lf "DFID"] [sname %s] [mo_t NULL] "
693 "[tname %s] [err %d]\n", fname,
694 PFID(lu_object_fid(&mo_po->mo_lu)),
695 PFID(lu_object_fid(&mo_pn->mo_lu)),
701 * Rename operation for cml.
703 * This is the most complex cross-reference operation. It may consist of up to 4
704 * MDS server and require several RPCs to be sent.
706 * \param mo_po Old parent object.
707 * \param mo_pn New parent object.
708 * \param lf FID of object to rename.
709 * \param ls_name Source file name.
710 * \param mo_t target object. Should be NULL here.
711 * \param lt_name Name of target file.
712 * \param ma object attributes.
714 static int cml_rename(const struct lu_env *env, struct md_object *mo_po,
715 struct md_object *mo_pn, const struct lu_fid *lf,
716 const struct lu_name *ls_name, struct md_object *mo_t,
717 const struct lu_name *lt_name, struct md_attr *ma)
719 struct cmm_thread_info *cmi;
720 struct md_attr *tmp_ma = NULL;
721 struct md_object *tmp_t = mo_t;
725 rc = cmm_mode_get(env, md_obj2dev(mo_po), lf, ma, &remote);
729 if (mo_t && lu_object_exists(&mo_t->mo_lu) < 0) {
731 * \note \a mo_t is remote object and there is RPC to unlink it.
732 * Before that, do local sanity check for rename first.
735 struct md_object *mo_s = md_object_find_slice(env,
736 md_obj2dev(mo_po), lf);
738 RETURN(PTR_ERR(mo_s));
740 LASSERT(lu_object_exists(&mo_s->mo_lu) > 0);
741 rc = mo_permission(env, md_object_next(mo_po),
742 md_object_next(mo_s),
744 lu_object_put(env, &mo_s->mo_lu);
748 rc = mo_permission(env, NULL, md_object_next(mo_po),
749 ma, MAY_UNLINK | MAY_VTX_FULL);
754 rc = mo_permission(env, NULL, md_object_next(mo_pn), ma,
755 MAY_UNLINK | MAY_VTX_PART);
760 * /note \a ma will be changed after mo_ref_del(), but we will use
761 * it for mdo_rename() later, so save it before mo_ref_del().
763 cmi = cmm_env_info(env);
764 tmp_ma = &cmi->cmi_ma;
766 rc = mo_ref_del(env, md_object_next(mo_t), ma);
770 tmp_ma->ma_attr_flags |= MDS_PERM_BYPASS;
775 * \note for src on remote MDS case, change its ctime before local
776 * rename. Firstly, do local sanity check for rename if necessary.
780 rc = mo_permission(env, NULL, md_object_next(mo_po),
781 ma, MAY_UNLINK | MAY_VTX_FULL);
786 LASSERT(lu_object_exists(&mo_t->mo_lu) > 0);
787 rc = mo_permission(env, md_object_next(mo_pn),
788 md_object_next(mo_t),
796 mask = (S_ISDIR(ma->ma_attr.la_mode) ?
797 MAY_LINK : MAY_CREATE);
800 rc = mo_permission(env, NULL,
801 md_object_next(mo_pn),
807 ma->ma_attr_flags |= MDS_PERM_BYPASS;
809 LASSERT(tmp_ma->ma_attr_flags & MDS_PERM_BYPASS);
812 rc = cmm_rename_ctime(env, md_obj2dev(mo_po), lf,
813 tmp_ma ? tmp_ma : ma);
815 /* TODO: revoke mo_t if necessary. */
816 cml_rename_warn("cmm_rename_ctime", mo_po,
817 mo_pn, lf, ls_name->ln_name,
818 tmp_t, lt_name->ln_name, rc);
823 /* local rename, mo_t can be NULL */
824 rc = mdo_rename(env, md_object_next(mo_po),
825 md_object_next(mo_pn), lf, ls_name,
826 md_object_next(mo_t), lt_name, tmp_ma ? tmp_ma : ma);
828 /* TODO: revoke all cml_rename */
829 cml_rename_warn("mdo_rename", mo_po, mo_pn, lf,
830 ls_name->ln_name, tmp_t, lt_name->ln_name, rc);
836 * Rename target partial operation.
837 * Used for cross-ref rename.
839 static int cml_rename_tgt(const struct lu_env *env, struct md_object *mo_p,
840 struct md_object *mo_t, const struct lu_fid *lf,
841 const struct lu_name *lname, struct md_attr *ma)
846 rc = mdo_rename_tgt(env, md_object_next(mo_p),
847 md_object_next(mo_t), lf, lname, ma);
852 * Name insert only operation.
853 * used only in case of rename_tgt() when target doesn't exist.
855 static int cml_name_insert(const struct lu_env *env, struct md_object *p,
856 const struct lu_name *lname, const struct lu_fid *lf,
857 const struct md_attr *ma)
862 rc = mdo_name_insert(env, md_object_next(p), lname, lf, ma);
869 * Check two fids are not subdirectories.
871 static int cmm_is_subdir(const struct lu_env *env, struct md_object *mo,
872 const struct lu_fid *fid, struct lu_fid *sfid)
874 struct cmm_thread_info *cmi;
878 cmi = cmm_env_info(env);
879 rc = cmm_mode_get(env, md_obj2dev(mo), fid, &cmi->cmi_ma, NULL);
883 if (!S_ISDIR(cmi->cmi_ma.ma_attr.la_mode))
886 rc = mdo_is_subdir(env, md_object_next(mo), fid, sfid);
890 static const struct md_dir_operations cml_dir_ops = {
891 .mdo_is_subdir = cmm_is_subdir,
892 .mdo_lookup = cml_lookup,
893 .mdo_lock_mode = cml_lock_mode,
894 .mdo_create = cml_create,
895 .mdo_link = cml_link,
896 .mdo_unlink = cml_unlink,
897 .mdo_name_insert = cml_name_insert,
898 .mdo_rename = cml_rename,
899 .mdo_rename_tgt = cml_rename_tgt,
900 .mdo_create_data = cml_create_data,
913 /** Get cmr_object from lu_object. */
914 static inline struct cmr_object *lu2cmr_obj(struct lu_object *o)
916 return container_of0(o, struct cmr_object, cmm_obj.cmo_obj.mo_lu);
918 /** Get cmr_object from md_object. */
919 static inline struct cmr_object *md2cmr_obj(struct md_object *mo)
921 return container_of0(mo, struct cmr_object, cmm_obj.cmo_obj);
923 /** Get cmr_object from cmm_object. */
924 static inline struct cmr_object *cmm2cmr_obj(struct cmm_object *co)
926 return container_of0(co, struct cmr_object, cmm_obj);
931 * Get proper child device from MDCs.
933 static struct lu_device *cmr_child_dev(struct cmm_device *d, __u32 num)
935 struct lu_device *next = NULL;
936 struct mdc_device *mdc;
938 cfs_spin_lock(&d->cmm_tgt_guard);
939 cfs_list_for_each_entry(mdc, &d->cmm_targets, mc_linkage) {
940 if (mdc->mc_num == num) {
941 next = mdc2lu_dev(mdc);
945 cfs_spin_unlock(&d->cmm_tgt_guard);
952 static void cmr_object_free(const struct lu_env *env,
953 struct lu_object *lo)
955 struct cmr_object *cro = lu2cmr_obj(lo);
961 * Initialize cmr object.
963 static int cmr_object_init(const struct lu_env *env, struct lu_object *lo,
964 const struct lu_object_conf *unused)
966 struct cmm_device *cd = lu2cmm_dev(lo->lo_dev);
967 struct lu_device *c_dev;
968 struct lu_object *c_obj;
973 c_dev = cmr_child_dev(cd, lu2cmr_obj(lo)->cmo_num);
977 c_obj = c_dev->ld_ops->ldo_object_alloc(env,
978 lo->lo_header, c_dev);
980 lu_object_add(lo, c_obj);
991 * Output lu_object data.
993 static int cmr_object_print(const struct lu_env *env, void *cookie,
994 lu_printer_t p, const struct lu_object *lo)
996 const struct cmr_object *cro = lu2cmr_obj((struct lu_object *)lo);
997 return (*p)(env, cookie, "[remote](mds_num=%d)", cro->cmo_num);
1001 * Cmr instance of lu_object_operations.
1003 static const struct lu_object_operations cmr_obj_ops = {
1004 .loo_object_init = cmr_object_init,
1005 .loo_object_free = cmr_object_free,
1006 .loo_object_print = cmr_object_print
1010 * \name cmr remote md_object operations.
1011 * All operations here are invalid and return errors. There is no local object
1012 * so these operations return two kinds of error:
1013 * -# -EFAULT if operation is prohibited.
1014 * -# -EREMOTE if operation can be done just to notify upper level about remote
1019 static int cmr_object_create(const struct lu_env *env,
1020 struct md_object *mo,
1021 const struct md_op_spec *spec,
1027 static int cmr_permission(const struct lu_env *env,
1028 struct md_object *p, struct md_object *c,
1029 struct md_attr *attr, int mask)
1034 static int cmr_attr_get(const struct lu_env *env, struct md_object *mo,
1035 struct md_attr *attr)
1040 static int cmr_attr_set(const struct lu_env *env, struct md_object *mo,
1041 const struct md_attr *attr)
1046 static int cmr_xattr_get(const struct lu_env *env, struct md_object *mo,
1047 struct lu_buf *buf, const char *name)
1052 static int cmr_readlink(const struct lu_env *env, struct md_object *mo,
1058 static int cmr_changelog(const struct lu_env *env, enum changelog_rec_type type,
1059 int flags, struct md_object *mo)
1064 static int cmr_xattr_list(const struct lu_env *env, struct md_object *mo,
1070 static int cmr_xattr_set(const struct lu_env *env, struct md_object *mo,
1071 const struct lu_buf *buf, const char *name,
1077 static int cmr_xattr_del(const struct lu_env *env, struct md_object *mo,
1083 static int cmr_ref_add(const struct lu_env *env, struct md_object *mo,
1084 const struct md_attr *ma)
1089 static int cmr_ref_del(const struct lu_env *env, struct md_object *mo,
1095 static int cmr_open(const struct lu_env *env, struct md_object *mo,
1101 static int cmr_close(const struct lu_env *env, struct md_object *mo,
1107 static int cmr_readpage(const struct lu_env *env, struct md_object *mo,
1108 const struct lu_rdpg *rdpg)
1113 static int cmr_capa_get(const struct lu_env *env, struct md_object *mo,
1114 struct lustre_capa *capa, int renewal)
1119 static int cmr_path(const struct lu_env *env, struct md_object *obj,
1120 char *path, int pathlen, __u64 *recno, int *linkno)
1125 static int cmr_object_sync(const struct lu_env *env, struct md_object *mo)
1130 static int cmr_file_lock(const struct lu_env *env, struct md_object *mo,
1131 struct lov_mds_md *lmm, struct ldlm_extent *extent,
1132 struct lustre_handle *lockh)
1137 static int cmr_file_unlock(const struct lu_env *env, struct md_object *mo,
1138 struct lov_mds_md *lmm, struct lustre_handle *lockh)
1144 * cmr moo_version_get().
1146 static dt_obj_version_t cmr_version_get(const struct lu_env *env,
1147 struct md_object *mo)
1149 /** Don't check remote object version */
1155 * cmr moo_version_set().
1156 * No need to update remote object version here, it is done as a part
1157 * of reintegration of partial operation on the remote server.
1159 static void cmr_version_set(const struct lu_env *env, struct md_object *mo,
1160 dt_obj_version_t version)
1165 /** Set of md_object_operations for cmr. */
1166 static const struct md_object_operations cmr_mo_ops = {
1167 .moo_permission = cmr_permission,
1168 .moo_attr_get = cmr_attr_get,
1169 .moo_attr_set = cmr_attr_set,
1170 .moo_xattr_get = cmr_xattr_get,
1171 .moo_xattr_set = cmr_xattr_set,
1172 .moo_xattr_list = cmr_xattr_list,
1173 .moo_xattr_del = cmr_xattr_del,
1174 .moo_object_create = cmr_object_create,
1175 .moo_ref_add = cmr_ref_add,
1176 .moo_ref_del = cmr_ref_del,
1177 .moo_open = cmr_open,
1178 .moo_close = cmr_close,
1179 .moo_readpage = cmr_readpage,
1180 .moo_readlink = cmr_readlink,
1181 .moo_changelog = cmr_changelog,
1182 .moo_capa_get = cmr_capa_get,
1183 .moo_object_sync = cmr_object_sync,
1184 .moo_version_get = cmr_version_get,
1185 .moo_version_set = cmr_version_set,
1186 .moo_path = cmr_path,
1187 .moo_file_lock = cmr_file_lock,
1188 .moo_file_unlock = cmr_file_unlock,
1193 * \name cmr md_dir operations.
1195 * All methods below are cross-ref by nature. They consist of remote call and
1196 * local operation. Due to future rollback functionality there are several
1197 * limitations for such methods:
1198 * -# remote call should be done at first to do epoch negotiation between all
1199 * MDS involved and to avoid the RPC inside transaction.
1200 * -# only one RPC can be sent - also due to epoch negotiation.
1201 * For more details see rollback HLD/DLD.
1204 static int cmr_lookup(const struct lu_env *env, struct md_object *mo_p,
1205 const struct lu_name *lname, struct lu_fid *lf,
1206 struct md_op_spec *spec)
1209 * This can happens while rename() If new parent is remote dir, lookup
1216 /** Return lock mode. */
1217 static mdl_mode_t cmr_lock_mode(const struct lu_env *env,
1218 struct md_object *mo, mdl_mode_t lm)
1224 * Create operation for cmr.
1225 * Remote object creation and local name insert.
1227 * \param mo_p Parent directory. Local object.
1228 * \param lchild_name name of file to create.
1229 * \param mo_c Child object. It has no real inode yet.
1230 * \param spec creation specification.
1231 * \param ma child object attributes.
1233 static int cmr_create(const struct lu_env *env, struct md_object *mo_p,
1234 const struct lu_name *lchild_name, struct md_object *mo_c,
1235 struct md_op_spec *spec,
1238 struct cmm_thread_info *cmi;
1239 struct md_attr *tmp_ma;
1243 /* Make sure that name isn't exist before doing remote call. */
1244 rc = mdo_lookup(env, md_object_next(mo_p), lchild_name,
1245 &cmm_env_info(env)->cmi_fid, NULL);
1248 else if (rc != -ENOENT)
1251 /* check the SGID attr */
1252 cmi = cmm_env_info(env);
1254 tmp_ma = &cmi->cmi_ma;
1255 tmp_ma->ma_valid = 0;
1256 tmp_ma->ma_need = MA_INODE;
1258 #ifdef CONFIG_FS_POSIX_ACL
1259 if (!S_ISLNK(ma->ma_attr.la_mode)) {
1260 tmp_ma->ma_acl = cmi->cmi_xattr_buf;
1261 tmp_ma->ma_acl_size = sizeof(cmi->cmi_xattr_buf);
1262 tmp_ma->ma_need |= MA_ACL_DEF;
1265 rc = mo_attr_get(env, md_object_next(mo_p), tmp_ma);
1269 if (tmp_ma->ma_attr.la_mode & S_ISGID) {
1270 ma->ma_attr.la_gid = tmp_ma->ma_attr.la_gid;
1271 if (S_ISDIR(ma->ma_attr.la_mode)) {
1272 ma->ma_attr.la_mode |= S_ISGID;
1273 ma->ma_attr.la_valid |= LA_MODE;
1277 #ifdef CONFIG_FS_POSIX_ACL
1278 if (tmp_ma->ma_valid & MA_ACL_DEF) {
1279 spec->u.sp_ea.fid = spec->u.sp_pfid;
1280 spec->u.sp_ea.eadata = tmp_ma->ma_acl;
1281 spec->u.sp_ea.eadatalen = tmp_ma->ma_acl_size;
1282 spec->sp_cr_flags |= MDS_CREATE_RMT_ACL;
1286 /* Local permission check for name_insert before remote ops. */
1287 rc = mo_permission(env, NULL, md_object_next(mo_p), NULL,
1288 (S_ISDIR(ma->ma_attr.la_mode) ?
1289 MAY_LINK : MAY_CREATE));
1294 * \note \a ma will be changed after mo_object_create(), but we will use
1295 * it for mdo_name_insert() later, so save it before mo_object_create().
1298 rc = mo_object_create(env, md_object_next(mo_c), spec, ma);
1300 tmp_ma->ma_attr_flags |= MDS_PERM_BYPASS;
1301 rc = mdo_name_insert(env, md_object_next(mo_p), lchild_name,
1302 lu_object_fid(&mo_c->mo_lu), tmp_ma);
1304 /* TODO: remove object mo_c on remote MDS */
1305 CWARN("cmr_create failed, should revoke: [mo_p "DFID"]"
1306 " [name %s] [mo_c "DFID"] [err %d]\n",
1307 PFID(lu_object_fid(&mo_p->mo_lu)),
1308 lchild_name->ln_name,
1309 PFID(lu_object_fid(&mo_c->mo_lu)), rc);
1317 * Link operations for cmr.
1319 * The link RPC is always issued to the server where source parent is living.
1320 * The first operation to do is object nlink increment on remote server.
1321 * Second one is local mdo_name_insert().
1323 * \param mo_p parent directory. It is local.
1324 * \param mo_s source object to link. It is remote.
1325 * \param lname Name of link file.
1326 * \param ma object attributes.
1328 static int cmr_link(const struct lu_env *env, struct md_object *mo_p,
1329 struct md_object *mo_s, const struct lu_name *lname,
1335 /* Make sure that name isn't exist before doing remote call. */
1336 rc = mdo_lookup(env, md_object_next(mo_p), lname,
1337 &cmm_env_info(env)->cmi_fid, NULL);
1340 } else if (rc == -ENOENT) {
1341 /* Local permission check for name_insert before remote ops. */
1342 rc = mo_permission(env, NULL, md_object_next(mo_p), NULL,
1347 rc = mo_ref_add(env, md_object_next(mo_s), ma);
1349 ma->ma_attr_flags |= MDS_PERM_BYPASS;
1350 rc = mdo_name_insert(env, md_object_next(mo_p), lname,
1351 lu_object_fid(&mo_s->mo_lu), ma);
1353 /* TODO: ref_del from mo_s on remote MDS */
1354 CWARN("cmr_link failed, should revoke: "
1355 "[mo_p "DFID"] [mo_s "DFID"] "
1356 "[name %s] [err %d]\n",
1357 PFID(lu_object_fid(&mo_p->mo_lu)),
1358 PFID(lu_object_fid(&mo_s->mo_lu)),
1359 lname->ln_name, rc);
1367 * Unlink operations for cmr.
1369 * The unlink RPC is always issued to the server where parent is living. Hence
1370 * the first operation to do is object unlink on remote server. Second one is
1371 * local mdo_name_remove().
1373 * \param mo_p parent md_object. It is local.
1374 * \param mo_c child object to be unlinked. It is remote.
1375 * \param lname Name of file to unlink.
1376 * \param ma object attributes.
1378 static int cmr_unlink(const struct lu_env *env, struct md_object *mo_p,
1379 struct md_object *mo_c, const struct lu_name *lname,
1382 struct cmm_thread_info *cmi;
1383 struct md_attr *tmp_ma;
1387 /* Local permission check for name_remove before remote ops. */
1388 rc = mo_permission(env, NULL, md_object_next(mo_p), ma,
1389 MAY_UNLINK | MAY_VTX_PART);
1394 * \note \a ma will be changed after mo_ref_del, but we will use
1395 * it for mdo_name_remove() later, so save it before mo_ref_del().
1397 cmi = cmm_env_info(env);
1398 tmp_ma = &cmi->cmi_ma;
1400 rc = mo_ref_del(env, md_object_next(mo_c), ma);
1402 tmp_ma->ma_attr_flags |= MDS_PERM_BYPASS;
1403 rc = mdo_name_remove(env, md_object_next(mo_p), lname, tmp_ma);
1405 /* TODO: ref_add to mo_c on remote MDS */
1406 CWARN("cmr_unlink failed, should revoke: [mo_p "DFID"]"
1407 " [mo_c "DFID"] [name %s] [err %d]\n",
1408 PFID(lu_object_fid(&mo_p->mo_lu)),
1409 PFID(lu_object_fid(&mo_c->mo_lu)),
1410 lname->ln_name, rc);
1417 /** Helper which outputs error message during cmr_rename() */
1418 static inline void cmr_rename_warn(const char *fname,
1419 struct md_object *mo_po,
1420 struct md_object *mo_pn,
1421 const struct lu_fid *lf,
1426 CWARN("cmr_rename failed for %s, should revoke: "
1427 "[mo_po "DFID"] [mo_pn "DFID"] [lf "DFID"] "
1428 "[sname %s] [tname %s] [err %d]\n", fname,
1429 PFID(lu_object_fid(&mo_po->mo_lu)),
1430 PFID(lu_object_fid(&mo_pn->mo_lu)),
1431 PFID(lf), s_name, t_name, err);
1435 * Rename operation for cmr.
1437 * This is the most complex cross-reference operation. It may consist of up to 4
1438 * MDS server and require several RPCs to be sent.
1440 * \param mo_po Old parent object.
1441 * \param mo_pn New parent object.
1442 * \param lf FID of object to rename.
1443 * \param ls_name Source file name.
1444 * \param mo_t target object. Should be NULL here.
1445 * \param lt_name Name of target file.
1446 * \param ma object attributes.
1448 static int cmr_rename(const struct lu_env *env,
1449 struct md_object *mo_po, struct md_object *mo_pn,
1450 const struct lu_fid *lf, const struct lu_name *ls_name,
1451 struct md_object *mo_t, const struct lu_name *lt_name,
1454 struct cmm_thread_info *cmi;
1455 struct md_attr *tmp_ma;
1459 LASSERT(mo_t == NULL);
1461 /* get real type of src */
1462 rc = cmm_mode_get(env, md_obj2dev(mo_po), lf, ma, NULL);
1466 /* Local permission check for name_remove before remote ops. */
1467 rc = mo_permission(env, NULL, md_object_next(mo_po), ma,
1468 MAY_UNLINK | MAY_VTX_FULL);
1473 * \todo \a ma maybe changed after mdo_rename_tgt(), but we will use it
1474 * for mdo_name_remove() later, so save it before mdo_rename_tgt.
1476 cmi = cmm_env_info(env);
1477 tmp_ma = &cmi->cmi_ma;
1480 * \note The \a mo_pn is remote directory, so we cannot even know if there is
1481 * \a mo_t or not. Therefore \a mo_t is NULL here but remote server should do
1482 * lookup and process this further.
1484 rc = mdo_rename_tgt(env, md_object_next(mo_pn),
1485 NULL/* mo_t */, lf, lt_name, ma);
1489 tmp_ma->ma_attr_flags |= MDS_PERM_BYPASS;
1491 /* src object maybe on remote MDS, do remote ops first. */
1492 rc = cmm_rename_ctime(env, md_obj2dev(mo_po), lf, tmp_ma);
1494 /* TODO: revoke mdo_rename_tgt */
1495 cmr_rename_warn("cmm_rename_ctime", mo_po, mo_pn, lf,
1496 ls_name->ln_name, lt_name->ln_name, rc);
1500 /* only old name is removed localy */
1501 rc = mdo_name_remove(env, md_object_next(mo_po), ls_name, tmp_ma);
1503 /* TODO: revoke all cmr_rename */
1504 cmr_rename_warn("mdo_name_remove", mo_po, mo_pn, lf,
1505 ls_name->ln_name, lt_name->ln_name, rc);
1511 * Part of cross-ref rename().
1512 * Used to insert new name in new parent and unlink target.
1514 static int cmr_rename_tgt(const struct lu_env *env,
1515 struct md_object *mo_p, struct md_object *mo_t,
1516 const struct lu_fid *lf, const struct lu_name *lname,
1519 struct cmm_thread_info *cmi;
1520 struct md_attr *tmp_ma;
1524 /* target object is remote one */
1525 /* Local permission check for rename_tgt before remote ops. */
1526 rc = mo_permission(env, NULL, md_object_next(mo_p), ma,
1527 MAY_UNLINK | MAY_VTX_PART);
1532 * XXX: @ma maybe changed after mo_ref_del, but we will use
1533 * it for mdo_rename_tgt later, so save it before mo_ref_del.
1535 cmi = cmm_env_info(env);
1536 tmp_ma = &cmi->cmi_ma;
1538 rc = mo_ref_del(env, md_object_next(mo_t), ma);
1539 /* continue locally with name handling only */
1541 tmp_ma->ma_attr_flags |= MDS_PERM_BYPASS;
1542 rc = mdo_rename_tgt(env, md_object_next(mo_p),
1543 NULL, lf, lname, tmp_ma);
1545 /* TODO: ref_add to mo_t on remote MDS */
1546 CWARN("cmr_rename_tgt failed, should revoke: "
1547 "[mo_p "DFID"] [mo_t "DFID"] [lf "DFID"] "
1548 "[name %s] [err %d]\n",
1549 PFID(lu_object_fid(&mo_p->mo_lu)),
1550 PFID(lu_object_fid(&mo_t->mo_lu)),
1552 lname->ln_name, rc);
1559 * The md_dir_operations for cmr.
1561 static const struct md_dir_operations cmr_dir_ops = {
1562 .mdo_is_subdir = cmm_is_subdir,
1563 .mdo_lookup = cmr_lookup,
1564 .mdo_lock_mode = cmr_lock_mode,
1565 .mdo_create = cmr_create,
1566 .mdo_link = cmr_link,
1567 .mdo_unlink = cmr_unlink,
1568 .mdo_rename = cmr_rename,
1569 .mdo_rename_tgt = cmr_rename_tgt