X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lustre%2Flod%2Flod_object.c;h=450e7f7fa0f6f0b70516dc1bacb5a1ff0cad112c;hp=b2374010d96ba6622256ee9cb80699dc6b707ea7;hb=ad1810a2dbea1eed5e8b5feb55bdf915a545feb3;hpb=4a1f10ef775b2b1a4631ee2f12bff3330b941e45;ds=sidebyside diff --git a/lustre/lod/lod_object.c b/lustre/lod/lod_object.c index b237401..450e7f7 100644 --- a/lustre/lod/lod_object.c +++ b/lustre/lod/lod_object.c @@ -6,13 +6,13 @@ * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 only, * as published by the Free Software Foundation. - + * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License version 2 for more details. A copy is * included in the COPYING file that accompanied this code. - + * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA @@ -23,11 +23,18 @@ * Copyright 2009 Sun Microsystems, Inc. All rights reserved * Use is subject to license terms. * - * Copyright (c) 2012, 2013, Intel Corporation. + * Copyright (c) 2012, 2014, Intel Corporation. */ /* * lustre/lod/lod_object.c * + * This file contains implementations of methods for the OSD API + * for the Logical Object Device (LOD) layer, which provides a virtual + * local OSD object interface to the MDD layer, and abstracts the + * addressing of local (OSD) and remote (OSP) objects. The API is + * described in the file lustre/include/dt_object.h and in + * lustre/doc/osd-api.txt. + * * Author: Alex Zhuravlev */ @@ -42,13 +49,24 @@ #include #include #include -#include +#include +#include +#include #include "lod_internal.h" -extern struct kmem_cache *lod_object_kmem; +static const char dot[] = "."; +static const char dotdot[] = ".."; + static const struct dt_body_operations lod_body_lnk_ops; +/** + * Implementation of dt_index_operations::dio_lookup + * + * Used with regular (non-striped) objects. + * + * \see dt_index_operations::dio_lookup() in the API description for details. + */ static int lod_index_lookup(const struct lu_env *env, struct dt_object *dt, struct dt_rec *rec, const struct dt_key *key, struct lustre_capa *capa) @@ -57,6 +75,14 @@ static int lod_index_lookup(const struct lu_env *env, struct dt_object *dt, return next->do_index_ops->dio_lookup(env, next, rec, key, capa); } +/** + * Implementation of dt_index_operations::dio_declare_insert. + * + * Used with regular (non-striped) objects. + * + * \see dt_index_operations::dio_declare_insert() in the API description + * for details. + */ static int lod_declare_index_insert(const struct lu_env *env, struct dt_object *dt, const struct dt_rec *rec, @@ -66,6 +92,13 @@ static int lod_declare_index_insert(const struct lu_env *env, return dt_declare_insert(env, dt_object_child(dt), rec, key, handle); } +/** + * Implementation of dt_index_operations::dio_insert. + * + * Used with regular (non-striped) objects + * + * \see dt_index_operations::dio_insert() in the API description for details. + */ static int lod_index_insert(const struct lu_env *env, struct dt_object *dt, const struct dt_rec *rec, @@ -77,6 +110,14 @@ static int lod_index_insert(const struct lu_env *env, return dt_insert(env, dt_object_child(dt), rec, key, th, capa, ign); } +/** + * Implementation of dt_index_operations::dio_declare_delete. + * + * Used with regular (non-striped) objects. + * + * \see dt_index_operations::dio_declare_delete() in the API description + * for details. + */ static int lod_declare_index_delete(const struct lu_env *env, struct dt_object *dt, const struct dt_key *key, @@ -85,6 +126,13 @@ static int lod_declare_index_delete(const struct lu_env *env, return dt_declare_delete(env, dt_object_child(dt), key, th); } +/** + * Implementation of dt_index_operations::dio_delete. + * + * Used with regular (non-striped) objects. + * + * \see dt_index_operations::dio_delete() in the API description for details. + */ static int lod_index_delete(const struct lu_env *env, struct dt_object *dt, const struct dt_key *key, @@ -94,6 +142,13 @@ static int lod_index_delete(const struct lu_env *env, return dt_delete(env, dt_object_child(dt), key, th, capa); } +/** + * Implementation of dt_it_ops::init. + * + * Used with regular (non-striped) objects. + * + * \see dt_it_ops::init() in the API description for details. + */ static struct dt_it *lod_it_init(const struct lu_env *env, struct dt_object *dt, __u32 attr, struct lustre_capa *capa) @@ -120,12 +175,19 @@ static struct dt_it *lod_it_init(const struct lu_env *env, } #define LOD_CHECK_IT(env, it) \ -{ \ +do { \ LASSERT((it)->lit_obj != NULL); \ LASSERT((it)->lit_it != NULL); \ -} while(0) +} while (0) -void lod_it_fini(const struct lu_env *env, struct dt_it *di) +/** + * Implementation of dt_index_operations::dio_it.fini. + * + * Used with regular (non-striped) objects. + * + * \see dt_index_operations::dio_it.fini() in the API description for details. + */ +static void lod_it_fini(const struct lu_env *env, struct dt_it *di) { struct lod_it *it = (struct lod_it *)di; @@ -137,8 +199,15 @@ void lod_it_fini(const struct lu_env *env, struct dt_it *di) it->lit_it = NULL; } -int lod_it_get(const struct lu_env *env, struct dt_it *di, - const struct dt_key *key) +/** + * Implementation of dt_it_ops::get. + * + * Used with regular (non-striped) objects. + * + * \see dt_it_ops::get() in the API description for details. + */ +static int lod_it_get(const struct lu_env *env, struct dt_it *di, + const struct dt_key *key) { const struct lod_it *it = (const struct lod_it *)di; @@ -146,7 +215,14 @@ int lod_it_get(const struct lu_env *env, struct dt_it *di, return it->lit_obj->do_index_ops->dio_it.get(env, it->lit_it, key); } -void lod_it_put(const struct lu_env *env, struct dt_it *di) +/** + * Implementation of dt_it_ops::put. + * + * Used with regular (non-striped) objects. + * + * \see dt_it_ops::put() in the API description for details. + */ +static void lod_it_put(const struct lu_env *env, struct dt_it *di) { struct lod_it *it = (struct lod_it *)di; @@ -154,7 +230,14 @@ void lod_it_put(const struct lu_env *env, struct dt_it *di) return it->lit_obj->do_index_ops->dio_it.put(env, it->lit_it); } -int lod_it_next(const struct lu_env *env, struct dt_it *di) +/** + * Implementation of dt_it_ops::next. + * + * Used with regular (non-striped) objects + * + * \see dt_it_ops::next() in the API description for details. + */ +static int lod_it_next(const struct lu_env *env, struct dt_it *di) { struct lod_it *it = (struct lod_it *)di; @@ -162,7 +245,15 @@ int lod_it_next(const struct lu_env *env, struct dt_it *di) return it->lit_obj->do_index_ops->dio_it.next(env, it->lit_it); } -struct dt_key *lod_it_key(const struct lu_env *env, const struct dt_it *di) +/** + * Implementation of dt_it_ops::key. + * + * Used with regular (non-striped) objects. + * + * \see dt_it_ops::key() in the API description for details. + */ +static struct dt_key *lod_it_key(const struct lu_env *env, + const struct dt_it *di) { const struct lod_it *it = (const struct lod_it *)di; @@ -170,7 +261,14 @@ struct dt_key *lod_it_key(const struct lu_env *env, const struct dt_it *di) return it->lit_obj->do_index_ops->dio_it.key(env, it->lit_it); } -int lod_it_key_size(const struct lu_env *env, const struct dt_it *di) +/** + * Implementation of dt_it_ops::key_size. + * + * Used with regular (non-striped) objects. + * + * \see dt_it_ops::key_size() in the API description for details. + */ +static int lod_it_key_size(const struct lu_env *env, const struct dt_it *di) { struct lod_it *it = (struct lod_it *)di; @@ -178,16 +276,48 @@ int lod_it_key_size(const struct lu_env *env, const struct dt_it *di) return it->lit_obj->do_index_ops->dio_it.key_size(env, it->lit_it); } -int lod_it_rec(const struct lu_env *env, const struct dt_it *di, - struct dt_rec *rec, __u32 attr) +/** + * Implementation of dt_it_ops::rec. + * + * Used with regular (non-striped) objects. + * + * \see dt_it_ops::rec() in the API description for details. + */ +static int lod_it_rec(const struct lu_env *env, const struct dt_it *di, + struct dt_rec *rec, __u32 attr) +{ + const struct lod_it *it = (const struct lod_it *)di; + + LOD_CHECK_IT(env, it); + return it->lit_obj->do_index_ops->dio_it.rec(env, it->lit_it, rec, + attr); +} + +/** + * Implementation of dt_it_ops::rec_size. + * + * Used with regular (non-striped) objects. + * + * \see dt_it_ops::rec_size() in the API description for details. + */ +static int lod_it_rec_size(const struct lu_env *env, const struct dt_it *di, + __u32 attr) { const struct lod_it *it = (const struct lod_it *)di; LOD_CHECK_IT(env, it); - return it->lit_obj->do_index_ops->dio_it.rec(env, it->lit_it, rec, attr); + return it->lit_obj->do_index_ops->dio_it.rec_size(env, it->lit_it, + attr); } -__u64 lod_it_store(const struct lu_env *env, const struct dt_it *di) +/** + * Implementation of dt_it_ops::store. + * + * Used with regular (non-striped) objects. + * + * \see dt_it_ops::store() in the API description for details. + */ +static __u64 lod_it_store(const struct lu_env *env, const struct dt_it *di) { const struct lod_it *it = (const struct lod_it *)di; @@ -195,7 +325,15 @@ __u64 lod_it_store(const struct lu_env *env, const struct dt_it *di) return it->lit_obj->do_index_ops->dio_it.store(env, it->lit_it); } -int lod_it_load(const struct lu_env *env, const struct dt_it *di, __u64 hash) +/** + * Implementation of dt_it_ops::load. + * + * Used with regular (non-striped) objects. + * + * \see dt_it_ops::load() in the API description for details. + */ +static int lod_it_load(const struct lu_env *env, const struct dt_it *di, + __u64 hash) { const struct lod_it *it = (const struct lod_it *)di; @@ -203,13 +341,21 @@ int lod_it_load(const struct lu_env *env, const struct dt_it *di, __u64 hash) return it->lit_obj->do_index_ops->dio_it.load(env, it->lit_it, hash); } -int lod_it_key_rec(const struct lu_env *env, const struct dt_it *di, - void* key_rec) +/** + * Implementation of dt_it_ops::key_rec. + * + * Used with regular (non-striped) objects. + * + * \see dt_it_ops::rec() in the API description for details. + */ +static int lod_it_key_rec(const struct lu_env *env, const struct dt_it *di, + void *key_rec) { const struct lod_it *it = (const struct lod_it *)di; LOD_CHECK_IT(env, it); - return it->lit_obj->do_index_ops->dio_it.key_rec(env, it->lit_it, key_rec); + return it->lit_obj->do_index_ops->dio_it.key_rec(env, it->lit_it, + key_rec); } static struct dt_index_operations lod_index_ops = { @@ -227,196 +373,1709 @@ static struct dt_index_operations lod_index_ops = { .key = lod_it_key, .key_size = lod_it_key_size, .rec = lod_it_rec, + .rec_size = lod_it_rec_size, .store = lod_it_store, .load = lod_it_load, .key_rec = lod_it_key_rec, } }; -static void lod_object_read_lock(const struct lu_env *env, - struct dt_object *dt, unsigned role) +/** + * Implementation of dt_it_ops::init. + * + * Used with striped objects. Internally just initializes the iterator + * on the first stripe. + * + * \see dt_it_ops::init() in the API description for details. + */ +static struct dt_it *lod_striped_it_init(const struct lu_env *env, + struct dt_object *dt, __u32 attr, + struct lustre_capa *capa) { - dt_read_lock(env, dt_object_child(dt), role); -} + struct lod_object *lo = lod_dt_obj(dt); + struct dt_object *next; + struct lod_it *it = &lod_env_info(env)->lti_it; + struct dt_it *it_next; + ENTRY; -static void lod_object_write_lock(const struct lu_env *env, - struct dt_object *dt, unsigned role) -{ - dt_write_lock(env, dt_object_child(dt), role); -} + LASSERT(lo->ldo_stripenr > 0); + next = lo->ldo_stripe[0]; + LASSERT(next != NULL); + LASSERT(next->do_index_ops != NULL); -static void lod_object_read_unlock(const struct lu_env *env, - struct dt_object *dt) -{ - dt_read_unlock(env, dt_object_child(dt)); + it_next = next->do_index_ops->dio_it.init(env, next, attr, capa); + if (IS_ERR(it_next)) + return it_next; + + /* currently we do not use more than one iterator per thread + * so we store it in thread info. if at some point we need + * more active iterators in a single thread, we can allocate + * additional ones */ + LASSERT(it->lit_obj == NULL); + + it->lit_stripe_index = 0; + it->lit_attr = attr; + it->lit_it = it_next; + it->lit_obj = dt; + + return (struct dt_it *)it; } -static void lod_object_write_unlock(const struct lu_env *env, - struct dt_object *dt) +#define LOD_CHECK_STRIPED_IT(env, it, lo) \ +do { \ + LASSERT((it)->lit_obj != NULL); \ + LASSERT((it)->lit_it != NULL); \ + LASSERT((lo)->ldo_stripenr > 0); \ + LASSERT((it)->lit_stripe_index < (lo)->ldo_stripenr); \ +} while (0) + +/** + * Implementation of dt_it_ops::fini. + * + * Used with striped objects. + * + * \see dt_it_ops::fini() in the API description for details. + */ +static void lod_striped_it_fini(const struct lu_env *env, struct dt_it *di) { - dt_write_unlock(env, dt_object_child(dt)); + struct lod_it *it = (struct lod_it *)di; + struct lod_object *lo = lod_dt_obj(it->lit_obj); + struct dt_object *next; + + LOD_CHECK_STRIPED_IT(env, it, lo); + + next = lo->ldo_stripe[it->lit_stripe_index]; + LASSERT(next != NULL); + LASSERT(next->do_index_ops != NULL); + + next->do_index_ops->dio_it.fini(env, it->lit_it); + + /* the iterator not in use any more */ + it->lit_obj = NULL; + it->lit_it = NULL; + it->lit_stripe_index = 0; } -static int lod_object_write_locked(const struct lu_env *env, - struct dt_object *dt) +/** + * Implementation of dt_it_ops::get. + * + * Right now it's not used widely, only to reset the iterator to the + * initial position. It should be possible to implement a full version + * which chooses a correct stripe to be able to position with any key. + * + * \see dt_it_ops::get() in the API description for details. + */ +static int lod_striped_it_get(const struct lu_env *env, struct dt_it *di, + const struct dt_key *key) { - return dt_write_locked(env, dt_object_child(dt)); + const struct lod_it *it = (const struct lod_it *)di; + struct lod_object *lo = lod_dt_obj(it->lit_obj); + struct dt_object *next; + ENTRY; + + LOD_CHECK_STRIPED_IT(env, it, lo); + + next = lo->ldo_stripe[it->lit_stripe_index]; + LASSERT(next != NULL); + LASSERT(next->do_index_ops != NULL); + + return next->do_index_ops->dio_it.get(env, it->lit_it, key); } -static int lod_attr_get(const struct lu_env *env, - struct dt_object *dt, - struct lu_attr *attr, - struct lustre_capa *capa) +/** + * Implementation of dt_it_ops::put. + * + * Used with striped objects. + * + * \see dt_it_ops::put() in the API description for details. + */ +static void lod_striped_it_put(const struct lu_env *env, struct dt_it *di) { - return dt_attr_get(env, dt_object_child(dt), attr, capa); + struct lod_it *it = (struct lod_it *)di; + struct lod_object *lo = lod_dt_obj(it->lit_obj); + struct dt_object *next; + + LOD_CHECK_STRIPED_IT(env, it, lo); + + next = lo->ldo_stripe[it->lit_stripe_index]; + LASSERT(next != NULL); + LASSERT(next->do_index_ops != NULL); + + return next->do_index_ops->dio_it.put(env, it->lit_it); } -static int lod_declare_attr_set(const struct lu_env *env, - struct dt_object *dt, - const struct lu_attr *attr, - struct thandle *handle) +/** + * Implementation of dt_it_ops::next. + * + * Used with striped objects. When the end of the current stripe is + * reached, the method takes the next stripe's iterator. + * + * \see dt_it_ops::next() in the API description for details. + */ +static int lod_striped_it_next(const struct lu_env *env, struct dt_it *di) { - struct dt_object *next = dt_object_child(dt); - struct lod_object *lo = lod_dt_obj(dt); - int rc, i; + struct lod_it *it = (struct lod_it *)di; + struct lod_object *lo = lod_dt_obj(it->lit_obj); + struct dt_object *next; + struct dt_it *it_next; + int rc; ENTRY; - /* - * declare setattr on the local object - */ - rc = dt_declare_attr_set(env, next, attr, handle); - if (rc) - RETURN(rc); + LOD_CHECK_STRIPED_IT(env, it, lo); - /* osp_declare_attr_set() ignores all attributes other than - * UID, GID, and size, and osp_attr_set() ignores all but UID - * and GID. Declaration of size attr setting happens through - * lod_declare_init_size(), and not through this function. - * Therefore we need not load striping unless ownership is - * changing. This should save memory and (we hope) speed up - * rename(). */ - if (!(attr->la_valid & (LA_UID | LA_GID))) + next = lo->ldo_stripe[it->lit_stripe_index]; + LASSERT(next != NULL); + LASSERT(next->do_index_ops != NULL); +again: + rc = next->do_index_ops->dio_it.next(env, it->lit_it); + if (rc < 0) RETURN(rc); - /* - * load striping information, notice we don't do this when object - * is being initialized as we don't need this information till - * few specific cases like destroy, chown - */ - rc = lod_load_striping(env, lo); - if (rc) + if (rc == 0 && it->lit_stripe_index == 0) RETURN(rc); - /* - * if object is striped declare changes on the stripes - */ - LASSERT(lo->ldo_stripe || lo->ldo_stripenr == 0); - for (i = 0; i < lo->ldo_stripenr; i++) { - LASSERT(lo->ldo_stripe[i]); - rc = dt_declare_attr_set(env, lo->ldo_stripe[i], attr, handle); - if (rc) { - CERROR("failed declaration: %d\n", rc); - break; - } - } + if (rc == 0 && it->lit_stripe_index > 0) { + struct lu_dirent *ent; - RETURN(rc); -} + ent = (struct lu_dirent *)lod_env_info(env)->lti_key; -static int lod_attr_set(const struct lu_env *env, - struct dt_object *dt, - const struct lu_attr *attr, - struct thandle *handle, - struct lustre_capa *capa) -{ - struct dt_object *next = dt_object_child(dt); - struct lod_object *lo = lod_dt_obj(dt); - int rc, i; - ENTRY; + rc = next->do_index_ops->dio_it.rec(env, it->lit_it, + (struct dt_rec *)ent, + it->lit_attr); + if (rc != 0) + RETURN(rc); + + /* skip . and .. for slave stripe */ + if ((strncmp(ent->lde_name, ".", + le16_to_cpu(ent->lde_namelen)) == 0 && + le16_to_cpu(ent->lde_namelen) == 1) || + (strncmp(ent->lde_name, "..", + le16_to_cpu(ent->lde_namelen)) == 0 && + le16_to_cpu(ent->lde_namelen) == 2)) + goto again; - /* - * apply changes to the local object - */ - rc = dt_attr_set(env, next, attr, handle, capa); - if (rc) RETURN(rc); + } + + /* go to next stripe */ + if (it->lit_stripe_index + 1 >= lo->ldo_stripenr) + RETURN(1); + + it->lit_stripe_index++; - if (!(attr->la_valid & (LA_UID | LA_GID))) + next->do_index_ops->dio_it.put(env, it->lit_it); + next->do_index_ops->dio_it.fini(env, it->lit_it); + + rc = next->do_ops->do_index_try(env, next, &dt_directory_features); + if (rc != 0) RETURN(rc); - /* - * if object is striped, apply changes to all the stripes - */ - LASSERT(lo->ldo_stripe || lo->ldo_stripenr == 0); - for (i = 0; i < lo->ldo_stripenr; i++) { - LASSERT(lo->ldo_stripe[i]); - rc = dt_attr_set(env, lo->ldo_stripe[i], attr, handle, capa); - if (rc) { - CERROR("failed declaration: %d\n", rc); - break; - } + next = lo->ldo_stripe[it->lit_stripe_index]; + LASSERT(next != NULL); + LASSERT(next->do_index_ops != NULL); + + it_next = next->do_index_ops->dio_it.init(env, next, it->lit_attr, + BYPASS_CAPA); + if (!IS_ERR(it_next)) { + it->lit_it = it_next; + goto again; + } else { + rc = PTR_ERR(it_next); } RETURN(rc); } -static int lod_xattr_get(const struct lu_env *env, struct dt_object *dt, - struct lu_buf *buf, const char *name, - struct lustre_capa *capa) +/** + * Implementation of dt_it_ops::key. + * + * Used with striped objects. + * + * \see dt_it_ops::key() in the API description for details. + */ +static struct dt_key *lod_striped_it_key(const struct lu_env *env, + const struct dt_it *di) { - struct lod_thread_info *info = lod_env_info(env); - struct lod_device *dev = lu2lod_dev(dt->do_lu.lo_dev); - int rc, is_root; - ENTRY; + const struct lod_it *it = (const struct lod_it *)di; + struct lod_object *lo = lod_dt_obj(it->lit_obj); + struct dt_object *next; - rc = dt_xattr_get(env, dt_object_child(dt), buf, name, capa); - if (rc != -ENODATA || !S_ISDIR(dt->do_lu.lo_header->loh_attr & S_IFMT)) - RETURN(rc); + LOD_CHECK_STRIPED_IT(env, it, lo); - /* - * lod returns default striping on the real root of the device - * this is like the root stores default striping for the whole - * filesystem. historically we've been using a different approach - * and store it in the config. - */ - dt_root_get(env, dev->lod_child, &info->lti_fid); - is_root = lu_fid_eq(&info->lti_fid, lu_object_fid(&dt->do_lu)); + next = lo->ldo_stripe[it->lit_stripe_index]; + LASSERT(next != NULL); + LASSERT(next->do_index_ops != NULL); + + return next->do_index_ops->dio_it.key(env, it->lit_it); +} + +/** + * Implementation of dt_it_ops::key_size. + * + * Used with striped objects. + * + * \see dt_it_ops::size() in the API description for details. + */ +static int lod_striped_it_key_size(const struct lu_env *env, + const struct dt_it *di) +{ + struct lod_it *it = (struct lod_it *)di; + struct lod_object *lo = lod_dt_obj(it->lit_obj); + struct dt_object *next; + + LOD_CHECK_STRIPED_IT(env, it, lo); + + next = lo->ldo_stripe[it->lit_stripe_index]; + LASSERT(next != NULL); + LASSERT(next->do_index_ops != NULL); + + return next->do_index_ops->dio_it.key_size(env, it->lit_it); +} + +/** + * Implementation of dt_it_ops::rec. + * + * Used with striped objects. + * + * \see dt_it_ops::rec() in the API description for details. + */ +static int lod_striped_it_rec(const struct lu_env *env, const struct dt_it *di, + struct dt_rec *rec, __u32 attr) +{ + const struct lod_it *it = (const struct lod_it *)di; + struct lod_object *lo = lod_dt_obj(it->lit_obj); + struct dt_object *next; + + LOD_CHECK_STRIPED_IT(env, it, lo); + + next = lo->ldo_stripe[it->lit_stripe_index]; + LASSERT(next != NULL); + LASSERT(next->do_index_ops != NULL); + + return next->do_index_ops->dio_it.rec(env, it->lit_it, rec, attr); +} + +/** + * Implementation of dt_it_ops::rec_size. + * + * Used with striped objects. + * + * \see dt_it_ops::rec_size() in the API description for details. + */ +static int lod_striped_it_rec_size(const struct lu_env *env, + const struct dt_it *di, __u32 attr) +{ + struct lod_it *it = (struct lod_it *)di; + struct lod_object *lo = lod_dt_obj(it->lit_obj); + struct dt_object *next; + + LOD_CHECK_STRIPED_IT(env, it, lo); + + next = lo->ldo_stripe[it->lit_stripe_index]; + LASSERT(next != NULL); + LASSERT(next->do_index_ops != NULL); + + return next->do_index_ops->dio_it.rec_size(env, it->lit_it, attr); +} + +/** + * Implementation of dt_it_ops::store. + * + * Used with striped objects. + * + * \see dt_it_ops::store() in the API description for details. + */ +static __u64 lod_striped_it_store(const struct lu_env *env, + const struct dt_it *di) +{ + const struct lod_it *it = (const struct lod_it *)di; + struct lod_object *lo = lod_dt_obj(it->lit_obj); + struct dt_object *next; + + LOD_CHECK_STRIPED_IT(env, it, lo); + + next = lo->ldo_stripe[it->lit_stripe_index]; + LASSERT(next != NULL); + LASSERT(next->do_index_ops != NULL); + + return next->do_index_ops->dio_it.store(env, it->lit_it); +} + +/** + * Implementation of dt_it_ops::load. + * + * Used with striped objects. + * + * \see dt_it_ops::load() in the API description for details. + */ +static int lod_striped_it_load(const struct lu_env *env, + const struct dt_it *di, __u64 hash) +{ + const struct lod_it *it = (const struct lod_it *)di; + struct lod_object *lo = lod_dt_obj(it->lit_obj); + struct dt_object *next; + + LOD_CHECK_STRIPED_IT(env, it, lo); + + next = lo->ldo_stripe[it->lit_stripe_index]; + LASSERT(next != NULL); + LASSERT(next->do_index_ops != NULL); + + return next->do_index_ops->dio_it.load(env, it->lit_it, hash); +} + +static struct dt_index_operations lod_striped_index_ops = { + .dio_lookup = lod_index_lookup, + .dio_declare_insert = lod_declare_index_insert, + .dio_insert = lod_index_insert, + .dio_declare_delete = lod_declare_index_delete, + .dio_delete = lod_index_delete, + .dio_it = { + .init = lod_striped_it_init, + .fini = lod_striped_it_fini, + .get = lod_striped_it_get, + .put = lod_striped_it_put, + .next = lod_striped_it_next, + .key = lod_striped_it_key, + .key_size = lod_striped_it_key_size, + .rec = lod_striped_it_rec, + .rec_size = lod_striped_it_rec_size, + .store = lod_striped_it_store, + .load = lod_striped_it_load, + } +}; + +/** + * Append the FID for each shard of the striped directory after the + * given LMV EA header. + * + * To simplify striped directory and the consistency verification, + * we only store the LMV EA header on disk, for both master object + * and slave objects. When someone wants to know the whole LMV EA, + * such as client readdir(), we can build the entrie LMV EA on the + * MDT side (in RAM) via iterating the sub-directory entries that + * are contained in the master object of the stripe directory. + * + * For the master object of the striped directroy, the valid name + * for each shard is composed of the ${shard_FID}:${shard_idx}. + * + * There may be holes in the LMV EA if some shards' name entries + * are corrupted or lost. + * + * \param[in] env pointer to the thread context + * \param[in] lo pointer to the master object of the striped directory + * \param[in] buf pointer to the lu_buf which will hold the LMV EA + * \param[in] resize whether re-allocate the buffer if it is not big enough + * + * \retval positive size of the LMV EA + * \retval 0 for nothing to be loaded + * \retval negative error number on failure + */ +int lod_load_lmv_shards(const struct lu_env *env, struct lod_object *lo, + struct lu_buf *buf, bool resize) +{ + struct lu_dirent *ent = + (struct lu_dirent *)lod_env_info(env)->lti_key; + struct lod_device *lod = lu2lod_dev(lo->ldo_obj.do_lu.lo_dev); + struct dt_object *obj = dt_object_child(&lo->ldo_obj); + struct lmv_mds_md_v1 *lmv1 = buf->lb_buf; + struct dt_it *it; + const struct dt_it_ops *iops; + __u32 stripes; + __u32 magic = le32_to_cpu(lmv1->lmv_magic); + size_t lmv1_size; + int rc; + ENTRY; + + /* If it is not a striped directory, then load nothing. */ + if (magic != LMV_MAGIC_V1) + RETURN(0); + + /* If it is in migration (or failure), then load nothing. */ + if (le32_to_cpu(lmv1->lmv_hash_type) & LMV_HASH_FLAG_MIGRATION) + RETURN(0); + + stripes = le32_to_cpu(lmv1->lmv_stripe_count); + if (stripes < 1) + RETURN(0); + + rc = lmv_mds_md_size(stripes, magic); + if (rc < 0) + RETURN(rc); + lmv1_size = rc; + if (buf->lb_len < lmv1_size) { + struct lu_buf tbuf; + + if (!resize) + RETURN(-ERANGE); + + tbuf = *buf; + buf->lb_buf = NULL; + buf->lb_len = 0; + lu_buf_alloc(buf, lmv1_size); + lmv1 = buf->lb_buf; + if (lmv1 == NULL) + RETURN(-ENOMEM); + + memcpy(buf->lb_buf, tbuf.lb_buf, tbuf.lb_len); + } + + if (unlikely(!dt_try_as_dir(env, obj))) + RETURN(-ENOTDIR); + + memset(&lmv1->lmv_stripe_fids[0], 0, stripes * sizeof(struct lu_fid)); + iops = &obj->do_index_ops->dio_it; + it = iops->init(env, obj, LUDA_64BITHASH, BYPASS_CAPA); + if (IS_ERR(it)) + RETURN(PTR_ERR(it)); + + rc = iops->load(env, it, 0); + if (rc == 0) + rc = iops->next(env, it); + else if (rc > 0) + rc = 0; + + while (rc == 0) { + char name[FID_LEN + 2] = ""; + struct lu_fid fid; + __u32 index; + int len; + + rc = iops->rec(env, it, (struct dt_rec *)ent, LUDA_64BITHASH); + if (rc != 0) + break; + + rc = -EIO; + + fid_le_to_cpu(&fid, &ent->lde_fid); + ent->lde_namelen = le16_to_cpu(ent->lde_namelen); + if (ent->lde_name[0] == '.') { + if (ent->lde_namelen == 1) + goto next; + + if (ent->lde_namelen == 2 && ent->lde_name[1] == '.') + goto next; + } + + len = snprintf(name, FID_LEN + 1, DFID":", PFID(&ent->lde_fid)); + /* The ent->lde_name is composed of ${FID}:${index} */ + if (ent->lde_namelen < len + 1 || + memcmp(ent->lde_name, name, len) != 0) { + CDEBUG(lod->lod_lmv_failout ? D_ERROR : D_INFO, + "%s: invalid shard name %.*s with the FID "DFID + " for the striped directory "DFID", %s\n", + lod2obd(lod)->obd_name, ent->lde_namelen, + ent->lde_name, PFID(&fid), + PFID(lu_object_fid(&obj->do_lu)), + lod->lod_lmv_failout ? "failout" : "skip"); + + if (lod->lod_lmv_failout) + break; + + goto next; + } + + index = 0; + do { + if (ent->lde_name[len] < '0' || + ent->lde_name[len] > '9') { + CDEBUG(lod->lod_lmv_failout ? D_ERROR : D_INFO, + "%s: invalid shard name %.*s with the " + "FID "DFID" for the striped directory " + DFID", %s\n", + lod2obd(lod)->obd_name, ent->lde_namelen, + ent->lde_name, PFID(&fid), + PFID(lu_object_fid(&obj->do_lu)), + lod->lod_lmv_failout ? + "failout" : "skip"); + + if (lod->lod_lmv_failout) + break; + + goto next; + } + + index = index * 10 + ent->lde_name[len++] - '0'; + } while (len < ent->lde_namelen); + + if (len == ent->lde_namelen) { + /* Out of LMV EA range. */ + if (index >= stripes) { + CERROR("%s: the shard %.*s for the striped " + "directory "DFID" is out of the known " + "LMV EA range [0 - %u], failout\n", + lod2obd(lod)->obd_name, ent->lde_namelen, + ent->lde_name, + PFID(lu_object_fid(&obj->do_lu)), + stripes - 1); + + break; + } + + /* The slot has been occupied. */ + if (!fid_is_zero(&lmv1->lmv_stripe_fids[index])) { + struct lu_fid fid0; + + fid_le_to_cpu(&fid0, + &lmv1->lmv_stripe_fids[index]); + CERROR("%s: both the shard "DFID" and "DFID + " for the striped directory "DFID + " claim the same LMV EA slot at the " + "index %d, failout\n", + lod2obd(lod)->obd_name, + PFID(&fid0), PFID(&fid), + PFID(lu_object_fid(&obj->do_lu)), index); + + break; + } + + /* stored as LE mode */ + lmv1->lmv_stripe_fids[index] = ent->lde_fid; + +next: + rc = iops->next(env, it); + } + } + + iops->put(env, it); + iops->fini(env, it); + + RETURN(rc > 0 ? lmv_mds_md_size(stripes, magic) : rc); +} + +/** + * Implementation of dt_object_operations::do_index_try. + * + * \see dt_object_operations::do_index_try() in the API description for details. + */ +static int lod_index_try(const struct lu_env *env, struct dt_object *dt, + const struct dt_index_features *feat) +{ + struct lod_object *lo = lod_dt_obj(dt); + struct dt_object *next = dt_object_child(dt); + int rc; + ENTRY; + + LASSERT(next->do_ops); + LASSERT(next->do_ops->do_index_try); + + rc = lod_load_striping_locked(env, lo); + if (rc != 0) + RETURN(rc); + + rc = next->do_ops->do_index_try(env, next, feat); + if (rc != 0) + RETURN(rc); + + if (lo->ldo_stripenr > 0) { + int i; + + for (i = 0; i < lo->ldo_stripenr; i++) { + if (dt_object_exists(lo->ldo_stripe[i]) == 0) + continue; + rc = lo->ldo_stripe[i]->do_ops->do_index_try(env, + lo->ldo_stripe[i], feat); + if (rc != 0) + RETURN(rc); + } + dt->do_index_ops = &lod_striped_index_ops; + } else { + dt->do_index_ops = &lod_index_ops; + } + + RETURN(rc); +} + +/** + * Implementation of dt_object_operations::do_read_lock. + * + * \see dt_object_operations::do_read_lock() in the API description for details. + */ +static void lod_object_read_lock(const struct lu_env *env, + struct dt_object *dt, unsigned role) +{ + dt_read_lock(env, dt_object_child(dt), role); +} + +/** + * Implementation of dt_object_operations::do_write_lock. + * + * \see dt_object_operations::do_write_lock() in the API description for + * details. + */ +static void lod_object_write_lock(const struct lu_env *env, + struct dt_object *dt, unsigned role) +{ + dt_write_lock(env, dt_object_child(dt), role); +} + +/** + * Implementation of dt_object_operations::do_read_unlock. + * + * \see dt_object_operations::do_read_unlock() in the API description for + * details. + */ +static void lod_object_read_unlock(const struct lu_env *env, + struct dt_object *dt) +{ + dt_read_unlock(env, dt_object_child(dt)); +} + +/** + * Implementation of dt_object_operations::do_write_unlock. + * + * \see dt_object_operations::do_write_unlock() in the API description for + * details. + */ +static void lod_object_write_unlock(const struct lu_env *env, + struct dt_object *dt) +{ + dt_write_unlock(env, dt_object_child(dt)); +} + +/** + * Implementation of dt_object_operations::do_write_locked. + * + * \see dt_object_operations::do_write_locked() in the API description for + * details. + */ +static int lod_object_write_locked(const struct lu_env *env, + struct dt_object *dt) +{ + return dt_write_locked(env, dt_object_child(dt)); +} + +/** + * Implementation of dt_object_operations::do_attr_get. + * + * \see dt_object_operations::do_attr_get() in the API description for details. + */ +static int lod_attr_get(const struct lu_env *env, + struct dt_object *dt, + struct lu_attr *attr, + struct lustre_capa *capa) +{ + /* Note: for striped directory, client will merge attributes + * from all of the sub-stripes see lmv_merge_attr(), and there + * no MDD logic depend on directory nlink/size/time, so we can + * always use master inode nlink and size for now. */ + return dt_attr_get(env, dt_object_child(dt), attr, capa); +} + +/** + * Mark all of the striped directory sub-stripes dead. + * + * When a striped object is a subject to removal, we have + * to mark all the stripes to prevent further access to + * them (e.g. create a new file in those). So we mark + * all the stripes with LMV_HASH_FLAG_DEAD. The function + * can be used to declare the changes and to apply them. + * If the object isn't striped, then just return success. + * + * \param[in] env execution environment + * \param[in] dt the striped object + * \param[in] handle transaction handle + * \param[in] declare whether to declare the change or apply + * + * \retval 0 on success + * \retval negative if failed + **/ +static int lod_mark_dead_object(const struct lu_env *env, + struct dt_object *dt, + struct thandle *handle, + bool declare) +{ + struct lod_object *lo = lod_dt_obj(dt); + struct lmv_mds_md_v1 *lmv; + __u32 dead_hash_type; + int rc; + int i; + + ENTRY; + + if (!S_ISDIR(dt->do_lu.lo_header->loh_attr)) + RETURN(0); + + rc = lod_load_striping_locked(env, lo); + if (rc != 0) + RETURN(rc); + + if (lo->ldo_stripenr == 0) + RETURN(0); + + rc = lod_get_lmv_ea(env, lo); + if (rc <= 0) + RETURN(rc); + + lmv = lod_env_info(env)->lti_ea_store; + lmv->lmv_magic = cpu_to_le32(LMV_MAGIC_STRIPE); + dead_hash_type = le32_to_cpu(lmv->lmv_hash_type) | LMV_HASH_FLAG_DEAD; + lmv->lmv_hash_type = cpu_to_le32(dead_hash_type); + for (i = 0; i < lo->ldo_stripenr; i++) { + struct lu_buf buf; + + lmv->lmv_master_mdt_index = i; + buf.lb_buf = lmv; + buf.lb_len = sizeof(*lmv); + if (declare) { + rc = dt_declare_xattr_set(env, lo->ldo_stripe[i], &buf, + XATTR_NAME_LMV, + LU_XATTR_REPLACE, handle); + } else { + rc = dt_xattr_set(env, lo->ldo_stripe[i], &buf, + XATTR_NAME_LMV, LU_XATTR_REPLACE, + handle, BYPASS_CAPA); + } + if (rc != 0) + break; + } + + RETURN(rc); +} + +/** + * Implementation of dt_object_operations::do_declare_attr_set. + * + * If the object is striped, then apply the changes to all the stripes. + * + * \see dt_object_operations::do_declare_attr_set() in the API description + * for details. + */ +static int lod_declare_attr_set(const struct lu_env *env, + struct dt_object *dt, + const struct lu_attr *attr, + struct thandle *handle) +{ + struct dt_object *next = dt_object_child(dt); + struct lod_object *lo = lod_dt_obj(dt); + int rc, i; + ENTRY; + + /* Set dead object on all other stripes */ + if (attr->la_valid & LA_FLAGS && !(attr->la_valid & ~LA_FLAGS) && + attr->la_flags & LUSTRE_SLAVE_DEAD_FL) { + rc = lod_mark_dead_object(env, dt, handle, true); + RETURN(rc); + } + + /* + * declare setattr on the local object + */ + rc = dt_declare_attr_set(env, next, attr, handle); + if (rc) + RETURN(rc); + + /* osp_declare_attr_set() ignores all attributes other than + * UID, GID, and size, and osp_attr_set() ignores all but UID + * and GID. Declaration of size attr setting happens through + * lod_declare_init_size(), and not through this function. + * Therefore we need not load striping unless ownership is + * changing. This should save memory and (we hope) speed up + * rename(). */ + if (!S_ISDIR(dt->do_lu.lo_header->loh_attr)) { + if (!(attr->la_valid & (LA_UID | LA_GID))) + RETURN(rc); + + if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_OWNER)) + RETURN(0); + } else { + if (!(attr->la_valid & (LA_UID | LA_GID | LA_MODE | + LA_ATIME | LA_MTIME | LA_CTIME))) + RETURN(rc); + } + /* + * load striping information, notice we don't do this when object + * is being initialized as we don't need this information till + * few specific cases like destroy, chown + */ + rc = lod_load_striping(env, lo); + if (rc) + RETURN(rc); + + if (lo->ldo_stripenr == 0) + RETURN(0); + + /* + * if object is striped declare changes on the stripes + */ + LASSERT(lo->ldo_stripe); + for (i = 0; i < lo->ldo_stripenr; i++) { + if (likely(lo->ldo_stripe[i] != NULL)) { + rc = dt_declare_attr_set(env, lo->ldo_stripe[i], attr, + handle); + if (rc != 0) { + CERROR("failed declaration: %d\n", rc); + break; + } + } + } + + if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_STRIPE) && + dt_object_exists(next) != 0 && + dt_object_remote(next) == 0) + dt_declare_xattr_del(env, next, XATTR_NAME_LOV, handle); + + if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_CHANGE_STRIPE) && + dt_object_exists(next) && + dt_object_remote(next) == 0 && S_ISREG(attr->la_mode)) { + struct lod_thread_info *info = lod_env_info(env); + struct lu_buf *buf = &info->lti_buf; + + buf->lb_buf = info->lti_ea_store; + buf->lb_len = info->lti_ea_store_size; + dt_declare_xattr_set(env, next, buf, XATTR_NAME_LOV, + LU_XATTR_REPLACE, handle); + } + + RETURN(rc); +} + +/** + * Implementation of dt_object_operations::do_attr_set. + * + * If the object is striped, then apply the changes to all or subset of + * the stripes depending on the object type and specific attributes. + * + * \see dt_object_operations::do_attr_set() in the API description for details. + */ +static int lod_attr_set(const struct lu_env *env, + struct dt_object *dt, + const struct lu_attr *attr, + struct thandle *handle, + struct lustre_capa *capa) +{ + struct dt_object *next = dt_object_child(dt); + struct lod_object *lo = lod_dt_obj(dt); + int rc, i; + ENTRY; + + /* Set dead object on all other stripes */ + if (attr->la_valid & LA_FLAGS && !(attr->la_valid & ~LA_FLAGS) && + attr->la_flags & LUSTRE_SLAVE_DEAD_FL) { + rc = lod_mark_dead_object(env, dt, handle, false); + RETURN(rc); + } + + /* + * apply changes to the local object + */ + rc = dt_attr_set(env, next, attr, handle, capa); + if (rc) + RETURN(rc); + + if (!S_ISDIR(dt->do_lu.lo_header->loh_attr)) { + if (!(attr->la_valid & (LA_UID | LA_GID))) + RETURN(rc); + + if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_OWNER)) + RETURN(0); + } else { + if (!(attr->la_valid & (LA_UID | LA_GID | LA_MODE | + LA_ATIME | LA_MTIME | LA_CTIME))) + RETURN(rc); + } + + if (lo->ldo_stripenr == 0) + RETURN(0); + + /* + * if object is striped, apply changes to all the stripes + */ + LASSERT(lo->ldo_stripe); + for (i = 0; i < lo->ldo_stripenr; i++) { + if (unlikely(lo->ldo_stripe[i] == NULL)) + continue; + if (S_ISDIR(dt->do_lu.lo_header->loh_attr) && + (dt_object_exists(lo->ldo_stripe[i]) == 0)) + continue; + + rc = dt_attr_set(env, lo->ldo_stripe[i], attr, handle, capa); + if (rc != 0) { + CERROR("failed declaration: %d\n", rc); + break; + } + } + + if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_STRIPE) && + dt_object_exists(next) != 0 && + dt_object_remote(next) == 0) + dt_xattr_del(env, next, XATTR_NAME_LOV, handle, BYPASS_CAPA); + + if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_CHANGE_STRIPE) && + dt_object_exists(next) && + dt_object_remote(next) == 0 && S_ISREG(attr->la_mode)) { + struct lod_thread_info *info = lod_env_info(env); + struct lu_buf *buf = &info->lti_buf; + struct ost_id *oi = &info->lti_ostid; + struct lu_fid *fid = &info->lti_fid; + struct lov_mds_md_v1 *lmm; + struct lov_ost_data_v1 *objs; + __u32 magic; + int rc1; + + rc1 = lod_get_lov_ea(env, lo); + if (rc1 <= 0) + RETURN(rc); + + buf->lb_buf = info->lti_ea_store; + buf->lb_len = info->lti_ea_store_size; + lmm = info->lti_ea_store; + magic = le32_to_cpu(lmm->lmm_magic); + if (magic == LOV_MAGIC_V1) + objs = &(lmm->lmm_objects[0]); + else + objs = &((struct lov_mds_md_v3 *)lmm)->lmm_objects[0]; + ostid_le_to_cpu(&objs->l_ost_oi, oi); + ostid_to_fid(fid, oi, le32_to_cpu(objs->l_ost_idx)); + fid->f_oid--; + fid_to_ostid(fid, oi); + ostid_cpu_to_le(oi, &objs->l_ost_oi); + dt_xattr_set(env, next, buf, XATTR_NAME_LOV, + LU_XATTR_REPLACE, handle, BYPASS_CAPA); + } + + RETURN(rc); +} + +/** + * Implementation of dt_object_operations::do_xattr_get. + * + * If LOV EA is requested from the root object and it's not + * found, then return default striping for the filesystem. + * + * \see dt_object_operations::do_xattr_get() in the API description for details. + */ +static int lod_xattr_get(const struct lu_env *env, struct dt_object *dt, + struct lu_buf *buf, const char *name, + struct lustre_capa *capa) +{ + struct lod_thread_info *info = lod_env_info(env); + struct lod_device *dev = lu2lod_dev(dt->do_lu.lo_dev); + int rc, is_root; + ENTRY; + + rc = dt_xattr_get(env, dt_object_child(dt), buf, name, capa); + if (strcmp(name, XATTR_NAME_LMV) == 0) { + struct lmv_mds_md_v1 *lmv1; + int rc1 = 0; + + if (rc > (typeof(rc))sizeof(*lmv1)) + RETURN(rc); + + if (rc < (typeof(rc))sizeof(*lmv1)) + RETURN(rc = rc > 0 ? -EINVAL : rc); + + if (buf->lb_buf == NULL || buf->lb_len == 0) { + CLASSERT(sizeof(*lmv1) <= sizeof(info->lti_key)); + + info->lti_buf.lb_buf = info->lti_key; + info->lti_buf.lb_len = sizeof(*lmv1); + rc = dt_xattr_get(env, dt_object_child(dt), + &info->lti_buf, name, capa); + if (unlikely(rc != sizeof(*lmv1))) + RETURN(rc = rc > 0 ? -EINVAL : rc); + + lmv1 = info->lti_buf.lb_buf; + /* The on-disk LMV EA only contains header, but the + * returned LMV EA size should contain the space for + * the FIDs of all shards of the striped directory. */ + if (le32_to_cpu(lmv1->lmv_magic) == LMV_MAGIC_V1) + rc = lmv_mds_md_size( + le32_to_cpu(lmv1->lmv_stripe_count), + LMV_MAGIC_V1); + } else { + rc1 = lod_load_lmv_shards(env, lod_dt_obj(dt), + buf, false); + } + + RETURN(rc = rc1 != 0 ? rc1 : rc); + } + + if (rc != -ENODATA || !S_ISDIR(dt->do_lu.lo_header->loh_attr & S_IFMT)) + RETURN(rc); + + /* + * lod returns default striping on the real root of the device + * this is like the root stores default striping for the whole + * filesystem. historically we've been using a different approach + * and store it in the config. + */ + dt_root_get(env, dev->lod_child, &info->lti_fid); + is_root = lu_fid_eq(&info->lti_fid, lu_object_fid(&dt->do_lu)); if (is_root && strcmp(XATTR_NAME_LOV, name) == 0) { struct lov_user_md *lum = buf->lb_buf; struct lov_desc *desc = &dev->lod_desc; - if (buf->lb_buf == NULL) { - rc = sizeof(*lum); - } else if (buf->lb_len >= sizeof(*lum)) { - lum->lmm_magic = cpu_to_le32(LOV_USER_MAGIC_V1); - lmm_oi_set_seq(&lum->lmm_oi, FID_SEQ_LOV_DEFAULT); - lmm_oi_cpu_to_le(&lum->lmm_oi, &lum->lmm_oi); - lum->lmm_pattern = cpu_to_le32(desc->ld_pattern); - lum->lmm_stripe_size = cpu_to_le32( - desc->ld_default_stripe_size); - lum->lmm_stripe_count = cpu_to_le16( - desc->ld_default_stripe_count); - lum->lmm_stripe_offset = cpu_to_le16( - desc->ld_default_stripe_offset); - rc = sizeof(*lum); + if (buf->lb_buf == NULL) { + rc = sizeof(*lum); + } else if (buf->lb_len >= sizeof(*lum)) { + lum->lmm_magic = cpu_to_le32(LOV_USER_MAGIC_V1); + lmm_oi_set_seq(&lum->lmm_oi, FID_SEQ_LOV_DEFAULT); + lmm_oi_set_id(&lum->lmm_oi, 0); + lmm_oi_cpu_to_le(&lum->lmm_oi, &lum->lmm_oi); + lum->lmm_pattern = cpu_to_le32(desc->ld_pattern); + lum->lmm_stripe_size = cpu_to_le32( + desc->ld_default_stripe_size); + lum->lmm_stripe_count = cpu_to_le16( + desc->ld_default_stripe_count); + lum->lmm_stripe_offset = cpu_to_le16( + desc->ld_default_stripe_offset); + rc = sizeof(*lum); + } else { + rc = -ERANGE; + } + } + + RETURN(rc); +} + +/** + * Verify LVM EA. + * + * Checks that the magic and the number of the stripes are sane. + * + * \param[in] lod lod device + * \param[in] lum a buffer storing LMV EA to verify + * + * \retval 0 if the EA is sane + * \retval negative otherwise + */ +static int lod_verify_md_striping(struct lod_device *lod, + const struct lmv_user_md_v1 *lum) +{ + int rc = 0; + ENTRY; + + if (unlikely(le32_to_cpu(lum->lum_magic) != LMV_USER_MAGIC)) + GOTO(out, rc = -EINVAL); + + if (unlikely(le32_to_cpu(lum->lum_stripe_count) == 0)) + GOTO(out, rc = -EINVAL); +out: + if (rc != 0) + CERROR("%s: invalid lmv_user_md: magic = %x, " + "stripe_offset = %d, stripe_count = %u: rc = %d\n", + lod2obd(lod)->obd_name, le32_to_cpu(lum->lum_magic), + (int)le32_to_cpu(lum->lum_stripe_offset), + le32_to_cpu(lum->lum_stripe_count), rc); + return rc; +} + +/** + * Initialize LMV EA for a slave. + * + * Initialize slave's LMV EA from the master's LMV EA. + * + * \param[in] master_lmv a buffer containing master's EA + * \param[out] slave_lmv a buffer where slave's EA will be stored + * + */ +static void lod_prep_slave_lmv_md(struct lmv_mds_md_v1 *slave_lmv, + const struct lmv_mds_md_v1 *master_lmv) +{ + *slave_lmv = *master_lmv; + slave_lmv->lmv_magic = cpu_to_le32(LMV_MAGIC_STRIPE); +} + +/** + * Generate LMV EA. + * + * Generate LMV EA from the object passed as \a dt. The object must have + * the stripes created and initialized. + * + * \param[in] env execution environment + * \param[in] dt object + * \param[out] lmv_buf buffer storing generated LMV EA + * + * \retval 0 on success + * \retval negative if failed + */ +static int lod_prep_lmv_md(const struct lu_env *env, struct dt_object *dt, + struct lu_buf *lmv_buf) +{ + struct lod_thread_info *info = lod_env_info(env); + struct lod_device *lod = lu2lod_dev(dt->do_lu.lo_dev); + struct lod_object *lo = lod_dt_obj(dt); + struct lmv_mds_md_v1 *lmm1; + int stripe_count; + int type = LU_SEQ_RANGE_ANY; + int rc; + __u32 mdtidx; + ENTRY; + + LASSERT(lo->ldo_dir_striped != 0); + LASSERT(lo->ldo_stripenr > 0); + stripe_count = lo->ldo_stripenr; + /* Only store the LMV EA heahder on the disk. */ + if (info->lti_ea_store_size < sizeof(*lmm1)) { + rc = lod_ea_store_resize(info, sizeof(*lmm1)); + if (rc != 0) + RETURN(rc); + } else { + memset(info->lti_ea_store, 0, sizeof(*lmm1)); + } + + lmm1 = (struct lmv_mds_md_v1 *)info->lti_ea_store; + lmm1->lmv_magic = cpu_to_le32(LMV_MAGIC); + lmm1->lmv_stripe_count = cpu_to_le32(stripe_count); + lmm1->lmv_hash_type = cpu_to_le32(lo->ldo_dir_hash_type); + rc = lod_fld_lookup(env, lod, lu_object_fid(&dt->do_lu), + &mdtidx, &type); + if (rc != 0) + RETURN(rc); + + lmm1->lmv_master_mdt_index = cpu_to_le32(mdtidx); + lmv_buf->lb_buf = info->lti_ea_store; + lmv_buf->lb_len = sizeof(*lmm1); + lo->ldo_dir_striping_cached = 1; + + RETURN(rc); +} + +/** + * Create in-core represenation for a striped directory. + * + * Parse the buffer containing LMV EA and instantiate LU objects + * representing the stripe objects. The pointers to the objects are + * stored in ldo_stripe field of \a lo. This function is used when + * we need to access an already created object (i.e. load from a disk). + * + * \param[in] env execution environment + * \param[in] lo lod object + * \param[in] buf buffer containing LMV EA + * + * \retval 0 on success + * \retval negative if failed + */ +int lod_parse_dir_striping(const struct lu_env *env, struct lod_object *lo, + const struct lu_buf *buf) +{ + struct lod_thread_info *info = lod_env_info(env); + struct lod_device *lod = lu2lod_dev(lo->ldo_obj.do_lu.lo_dev); + struct lod_tgt_descs *ltd = &lod->lod_mdt_descs; + struct dt_object **stripe; + union lmv_mds_md *lmm = buf->lb_buf; + struct lmv_mds_md_v1 *lmv1 = &lmm->lmv_md_v1; + struct lu_fid *fid = &info->lti_fid; + unsigned int i; + int rc = 0; + ENTRY; + + if (le32_to_cpu(lmv1->lmv_hash_type) & LMV_HASH_FLAG_MIGRATION) + RETURN(0); + + if (le32_to_cpu(lmv1->lmv_magic) == LMV_MAGIC_STRIPE) { + lo->ldo_dir_slave_stripe = 1; + RETURN(0); + } + + if (le32_to_cpu(lmv1->lmv_magic) != LMV_MAGIC_V1) + RETURN(-EINVAL); + + if (le32_to_cpu(lmv1->lmv_stripe_count) < 1) + RETURN(0); + + LASSERT(lo->ldo_stripe == NULL); + OBD_ALLOC(stripe, sizeof(stripe[0]) * + (le32_to_cpu(lmv1->lmv_stripe_count))); + if (stripe == NULL) + RETURN(-ENOMEM); + + for (i = 0; i < le32_to_cpu(lmv1->lmv_stripe_count); i++) { + struct dt_device *tgt_dt; + struct dt_object *dto; + int type = LU_SEQ_RANGE_ANY; + __u32 idx; + + fid_le_to_cpu(fid, &lmv1->lmv_stripe_fids[i]); + if (!fid_is_sane(fid)) + GOTO(out, rc = -ESTALE); + + rc = lod_fld_lookup(env, lod, fid, &idx, &type); + if (rc != 0) + GOTO(out, rc); + + if (idx == lod2lu_dev(lod)->ld_site->ld_seq_site->ss_node_id) { + tgt_dt = lod->lod_child; } else { - rc = -ERANGE; + struct lod_tgt_desc *tgt; + + tgt = LTD_TGT(ltd, idx); + if (tgt == NULL) + GOTO(out, rc = -ESTALE); + tgt_dt = tgt->ltd_tgt; } + + dto = dt_locate_at(env, tgt_dt, fid, + lo->ldo_obj.do_lu.lo_dev->ld_site->ls_top_dev, + NULL); + if (IS_ERR(dto)) + GOTO(out, rc = PTR_ERR(dto)); + + stripe[i] = dto; } +out: + lo->ldo_stripe = stripe; + lo->ldo_stripenr = le32_to_cpu(lmv1->lmv_stripe_count); + lo->ldo_stripes_allocated = le32_to_cpu(lmv1->lmv_stripe_count); + if (rc != 0) + lod_object_free_striping(env, lo); RETURN(rc); } -/* - * LOV xattr is a storage for striping, and LOD owns this xattr. - * but LOD allows others to control striping to some extent - * - to reset strping - * - to set new defined striping - * - to set new semi-defined striping - * - number of stripes is defined - * - number of stripes + osts are defined - * - ?? +/** + * Create a striped directory. + * + * Create a striped directory with a given stripe pattern on the specified MDTs. + * A striped directory is represented as a regular directory - an index listing + * all the stripes. The stripes point back to the master object with ".." and + * LinkEA. The master object gets LMV EA which identifies it as a striped + * directory. The function allocates FIDs for all the stripes. + * + * \param[in] env execution environment + * \param[in] dt object + * \param[in] attr attributes to initialize the objects with + * \param[in] lum a pattern specifying the number of stripes and + * MDT to start from + * \param[in] dof type of objects to be created + * \param[in] th transaction handle + * + * \retval 0 on success + * \retval negative if failed + */ +static int lod_prep_md_striped_create(const struct lu_env *env, + struct dt_object *dt, + struct lu_attr *attr, + const struct lmv_user_md_v1 *lum, + struct dt_object_format *dof, + struct thandle *th) +{ + struct lod_device *lod = lu2lod_dev(dt->do_lu.lo_dev); + struct lod_tgt_descs *ltd = &lod->lod_mdt_descs; + struct lod_object *lo = lod_dt_obj(dt); + struct lod_thread_info *info = lod_env_info(env); + struct dt_object **stripe; + struct lu_buf lmv_buf; + struct lu_buf slave_lmv_buf; + struct lmv_mds_md_v1 *lmm; + struct lmv_mds_md_v1 *slave_lmm = NULL; + struct dt_insert_rec *rec = &info->lti_dt_rec; + __u32 stripe_count; + int *idx_array; + int rc = 0; + __u32 i; + __u32 j; + ENTRY; + + /* The lum has been verifed in lod_verify_md_striping */ + LASSERT(le32_to_cpu(lum->lum_magic) == LMV_USER_MAGIC); + LASSERT(le32_to_cpu(lum->lum_stripe_count) > 0); + + stripe_count = le32_to_cpu(lum->lum_stripe_count); + + /* shrink the stripe_count to the avaible MDT count */ + if (stripe_count > lod->lod_remote_mdt_count + 1) + stripe_count = lod->lod_remote_mdt_count + 1; + + OBD_ALLOC(stripe, sizeof(stripe[0]) * stripe_count); + if (stripe == NULL) + RETURN(-ENOMEM); + + OBD_ALLOC(idx_array, sizeof(idx_array[0]) * stripe_count); + if (idx_array == NULL) + GOTO(out_free, rc = -ENOMEM); + + for (i = 0; i < stripe_count; i++) { + struct lod_tgt_desc *tgt = NULL; + struct dt_object *dto; + struct lu_fid fid = { 0 }; + int idx; + struct lu_object_conf conf = { 0 }; + struct dt_device *tgt_dt = NULL; + + if (i == 0) { + /* Right now, master stripe and master object are + * on the same MDT */ + idx = le32_to_cpu(lum->lum_stripe_offset); + rc = obd_fid_alloc(env, lod->lod_child_exp, &fid, + NULL); + if (rc < 0) + GOTO(out_put, rc); + tgt_dt = lod->lod_child; + goto next; + } + + idx = (idx_array[i - 1] + 1) % (lod->lod_remote_mdt_count + 1); + + for (j = 0; j < lod->lod_remote_mdt_count; + j++, idx = (idx + 1) % (lod->lod_remote_mdt_count + 1)) { + bool already_allocated = false; + __u32 k; + + CDEBUG(D_INFO, "try idx %d, mdt cnt %u," + " allocated %u, last allocated %d\n", idx, + lod->lod_remote_mdt_count, i, idx_array[i - 1]); + + /* Find next available target */ + if (!cfs_bitmap_check(ltd->ltd_tgt_bitmap, idx)) + continue; + + /* check whether the idx already exists + * in current allocated array */ + for (k = 0; k < i; k++) { + if (idx_array[k] == idx) { + already_allocated = true; + break; + } + } + + if (already_allocated) + continue; + + /* check the status of the OSP */ + tgt = LTD_TGT(ltd, idx); + if (tgt == NULL) + continue; + + tgt_dt = tgt->ltd_tgt; + rc = dt_statfs(env, tgt_dt, NULL); + if (rc) { + /* this OSP doesn't feel well */ + rc = 0; + continue; + } + + rc = obd_fid_alloc(env, tgt->ltd_exp, &fid, NULL); + if (rc < 0) { + rc = 0; + continue; + } + + break; + } + + /* Can not allocate more stripes */ + if (j == lod->lod_remote_mdt_count) { + CDEBUG(D_INFO, "%s: require stripes %u only get %d\n", + lod2obd(lod)->obd_name, stripe_count, i - 1); + break; + } + + CDEBUG(D_INFO, "idx %d, mdt cnt %u," + " allocated %u, last allocated %d\n", idx, + lod->lod_remote_mdt_count, i, idx_array[i - 1]); + +next: + /* tgt_dt and fid must be ready after search avaible OSP + * in the above loop */ + LASSERT(tgt_dt != NULL); + LASSERT(fid_is_sane(&fid)); + conf.loc_flags = LOC_F_NEW; + dto = dt_locate_at(env, tgt_dt, &fid, + dt->do_lu.lo_dev->ld_site->ls_top_dev, + &conf); + if (IS_ERR(dto)) + GOTO(out_put, rc = PTR_ERR(dto)); + stripe[i] = dto; + idx_array[i] = idx; + } + + lo->ldo_dir_striped = 1; + lo->ldo_stripe = stripe; + lo->ldo_stripenr = i; + lo->ldo_stripes_allocated = stripe_count; + + if (lo->ldo_stripenr == 0) + GOTO(out_put, rc = -ENOSPC); + + rc = lod_prep_lmv_md(env, dt, &lmv_buf); + if (rc != 0) + GOTO(out_put, rc); + lmm = lmv_buf.lb_buf; + + OBD_ALLOC_PTR(slave_lmm); + if (slave_lmm == NULL) + GOTO(out_put, rc = -ENOMEM); + + lod_prep_slave_lmv_md(slave_lmm, lmm); + slave_lmv_buf.lb_buf = slave_lmm; + slave_lmv_buf.lb_len = sizeof(*slave_lmm); + + if (!dt_try_as_dir(env, dt_object_child(dt))) + GOTO(out_put, rc = -EINVAL); + + rec->rec_type = S_IFDIR; + for (i = 0; i < lo->ldo_stripenr; i++) { + struct dt_object *dto = stripe[i]; + char *stripe_name = info->lti_key; + struct lu_name *sname; + struct linkea_data ldata = { 0 }; + struct lu_buf linkea_buf; + + rc = dt_declare_create(env, dto, attr, NULL, dof, th); + if (rc != 0) + GOTO(out_put, rc); + + if (!dt_try_as_dir(env, dto)) + GOTO(out_put, rc = -EINVAL); + + rec->rec_fid = lu_object_fid(&dto->do_lu); + rc = dt_declare_insert(env, dto, (const struct dt_rec *)rec, + (const struct dt_key *)dot, th); + if (rc != 0) + GOTO(out_put, rc); + + /* master stripe FID will be put to .. */ + rec->rec_fid = lu_object_fid(&dt->do_lu); + rc = dt_declare_insert(env, dto, (const struct dt_rec *)rec, + (const struct dt_key *)dotdot, th); + if (rc != 0) + GOTO(out_put, rc); + + /* probably nothing to inherite */ + if (lo->ldo_striping_cached && + !LOVEA_DELETE_VALUES(lo->ldo_def_stripe_size, + lo->ldo_def_stripenr, + lo->ldo_def_stripe_offset, + lo->ldo_pool)) { + struct lov_user_md_v3 *v3; + + /* sigh, lti_ea_store has been used for lmv_buf, + * so we have to allocate buffer for default + * stripe EA */ + OBD_ALLOC_PTR(v3); + if (v3 == NULL) + GOTO(out_put, rc = -ENOMEM); + + memset(v3, 0, sizeof(*v3)); + v3->lmm_magic = cpu_to_le32(LOV_USER_MAGIC_V3); + v3->lmm_stripe_count = + cpu_to_le16(lo->ldo_def_stripenr); + v3->lmm_stripe_offset = + cpu_to_le16(lo->ldo_def_stripe_offset); + v3->lmm_stripe_size = + cpu_to_le32(lo->ldo_def_stripe_size); + if (lo->ldo_pool != NULL) + strlcpy(v3->lmm_pool_name, lo->ldo_pool, + sizeof(v3->lmm_pool_name)); + + info->lti_buf.lb_buf = v3; + info->lti_buf.lb_len = sizeof(*v3); + rc = dt_declare_xattr_set(env, dto, + &info->lti_buf, + XATTR_NAME_LOV, + 0, th); + OBD_FREE_PTR(v3); + if (rc != 0) + GOTO(out_put, rc); + } + + if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_SLAVE_LMV) || + cfs_fail_val != i) { + if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_SLAVE_LMV) && + cfs_fail_val == i) + slave_lmm->lmv_master_mdt_index = + cpu_to_le32(i + 1); + else + slave_lmm->lmv_master_mdt_index = + cpu_to_le32(i); + rc = dt_declare_xattr_set(env, dto, &slave_lmv_buf, + XATTR_NAME_LMV, 0, th); + if (rc != 0) + GOTO(out_put, rc); + } + + if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_SLAVE_NAME) && + cfs_fail_val == i) + snprintf(stripe_name, sizeof(info->lti_key), DFID":%u", + PFID(lu_object_fid(&dto->do_lu)), i + 1); + else + snprintf(stripe_name, sizeof(info->lti_key), DFID":%u", + PFID(lu_object_fid(&dto->do_lu)), i); + + sname = lod_name_get(env, stripe_name, strlen(stripe_name)); + rc = linkea_data_new(&ldata, &info->lti_linkea_buf); + if (rc != 0) + GOTO(out_put, rc); + + rc = linkea_add_buf(&ldata, sname, lu_object_fid(&dt->do_lu)); + if (rc != 0) + GOTO(out_put, rc); + + linkea_buf.lb_buf = ldata.ld_buf->lb_buf; + linkea_buf.lb_len = ldata.ld_leh->leh_len; + rc = dt_declare_xattr_set(env, dto, &linkea_buf, + XATTR_NAME_LINK, 0, th); + if (rc != 0) + GOTO(out_put, rc); + + rec->rec_fid = lu_object_fid(&dto->do_lu); + rc = dt_declare_insert(env, dt_object_child(dt), + (const struct dt_rec *)rec, + (const struct dt_key *)stripe_name, th); + if (rc != 0) + GOTO(out_put, rc); + + rc = dt_declare_ref_add(env, dt_object_child(dt), th); + if (rc != 0) + GOTO(out_put, rc); + } + + rc = dt_declare_xattr_set(env, dt_object_child(dt), &lmv_buf, + XATTR_NAME_LMV, 0, th); + if (rc != 0) + GOTO(out_put, rc); + +out_put: + if (rc < 0) { + for (i = 0; i < stripe_count; i++) + if (stripe[i] != NULL) + lu_object_put(env, &stripe[i]->do_lu); + OBD_FREE(stripe, sizeof(stripe[0]) * stripe_count); + lo->ldo_stripenr = 0; + lo->ldo_stripes_allocated = 0; + lo->ldo_stripe = NULL; + } + +out_free: + if (idx_array != NULL) + OBD_FREE(idx_array, sizeof(idx_array[0]) * stripe_count); + if (slave_lmm != NULL) + OBD_FREE_PTR(slave_lmm); + + RETURN(rc); +} + +/** + * Declare create striped md object. + * + * The function declares intention to create a striped directory. This is a + * wrapper for lod_prep_md_striped_create(). The only additional functionality + * is to verify pattern \a lum_buf is good. Check that function for the details. + * + * \param[in] env execution environment + * \param[in] dt object + * \param[in] attr attributes to initialize the objects with + * \param[in] lum_buf a pattern specifying the number of stripes and + * MDT to start from + * \param[in] dof type of objects to be created + * \param[in] th transaction handle + * + * \retval 0 on success + * \retval negative if failed + * + */ +static int lod_declare_xattr_set_lmv(const struct lu_env *env, + struct dt_object *dt, + struct lu_attr *attr, + const struct lu_buf *lum_buf, + struct dt_object_format *dof, + struct thandle *th) +{ + struct lod_object *lo = lod_dt_obj(dt); + struct lod_device *lod = lu2lod_dev(dt->do_lu.lo_dev); + struct lmv_user_md_v1 *lum; + int rc; + ENTRY; + + lum = lum_buf->lb_buf; + LASSERT(lum != NULL); + + CDEBUG(D_INFO, "lum magic = %x count = %u offset = %d\n", + le32_to_cpu(lum->lum_magic), le32_to_cpu(lum->lum_stripe_count), + (int)le32_to_cpu(lum->lum_stripe_offset)); + + if (le32_to_cpu(lum->lum_stripe_count) == 0) + GOTO(out, rc = 0); + + rc = lod_verify_md_striping(lod, lum); + if (rc != 0) + GOTO(out, rc); + + /* prepare dir striped objects */ + rc = lod_prep_md_striped_create(env, dt, attr, lum, dof, th); + if (rc != 0) { + /* failed to create striping, let's reset + * config so that others don't get confused */ + lod_object_free_striping(env, lo); + GOTO(out, rc); + } +out: + RETURN(rc); +} + + +/** + * Implementation of dt_object_operations::do_declare_xattr_set. + * + * Used with regular (non-striped) objects. Basically it + * initializes the striping information and applies the + * change to all the stripes. + * + * \see dt_object_operations::do_declare_xattr_set() in the API description + * for details. + */ +static int lod_dir_declare_xattr_set(const struct lu_env *env, + struct dt_object *dt, + const struct lu_buf *buf, + const char *name, int fl, + struct thandle *th) +{ + struct dt_object *next = dt_object_child(dt); + struct lod_device *d = lu2lod_dev(dt->do_lu.lo_dev); + struct lod_object *lo = lod_dt_obj(dt); + int i; + int rc; + ENTRY; + + if (strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0) { + struct lmv_user_md_v1 *lum; + + LASSERT(buf != NULL && buf->lb_buf != NULL); + lum = buf->lb_buf; + rc = lod_verify_md_striping(d, lum); + if (rc != 0) + RETURN(rc); + } + + rc = dt_declare_xattr_set(env, next, buf, name, fl, th); + if (rc != 0) + RETURN(rc); + + /* set xattr to each stripes, if needed */ + rc = lod_load_striping(env, lo); + if (rc != 0) + RETURN(rc); + + /* Note: Do not set LinkEA on sub-stripes, otherwise + * it will confuse the fid2path process(see mdt_path_current()). + * The linkEA between master and sub-stripes is set in + * lod_xattr_set_lmv(). */ + if (lo->ldo_stripenr == 0 || strcmp(name, XATTR_NAME_LINK) == 0) + RETURN(0); + + for (i = 0; i < lo->ldo_stripenr; i++) { + LASSERT(lo->ldo_stripe[i]); + rc = dt_declare_xattr_set(env, lo->ldo_stripe[i], buf, + name, fl, th); + if (rc != 0) + break; + } + + RETURN(rc); +} + +/** + * Implementation of dt_object_operations::do_declare_xattr_set. + * + * \see dt_object_operations::do_declare_xattr_set() in the API description + * for details. + * + * the extension to the API: + * - declaring LOVEA requests striping creation + * - LU_XATTR_REPLACE means layout swap */ static int lod_declare_xattr_set(const struct lu_env *env, struct dt_object *dt, @@ -437,7 +2096,7 @@ static int lod_declare_xattr_set(const struct lu_env *env, * LU_XATTR_REPLACE is set to indicate a layout swap */ mode = dt->do_lu.lo_header->loh_attr & S_IFMT; - if ((S_ISREG(mode) || !mode) && !strcmp(name, XATTR_NAME_LOV) && + if ((S_ISREG(mode) || mode == 0) && strcmp(name, XATTR_NAME_LOV) == 0 && !(fl & LU_XATTR_REPLACE)) { /* * this is a request to manipulate object's striping @@ -452,15 +2111,143 @@ static int lod_declare_xattr_set(const struct lu_env *env, attr->la_mode = S_IFREG; } rc = lod_declare_striped_object(env, dt, attr, buf, th); - if (rc) - RETURN(rc); + } else if (S_ISDIR(mode)) { + rc = lod_dir_declare_xattr_set(env, dt, buf, name, fl, th); + } else { + rc = dt_declare_xattr_set(env, next, buf, name, fl, th); } - rc = dt_declare_xattr_set(env, next, buf, name, fl, th); + RETURN(rc); +} + +/** + * Resets cached default striping in the object. + * + * \param[in] lo object + */ +static void lod_lov_stripe_cache_clear(struct lod_object *lo) +{ + lo->ldo_striping_cached = 0; + lo->ldo_def_striping_set = 0; + lod_object_set_pool(lo, NULL); + lo->ldo_def_stripe_size = 0; + lo->ldo_def_stripenr = 0; + if (lo->ldo_dir_stripe != NULL) + lo->ldo_dir_striping_cached = 0; +} + +/** + * Apply xattr changes to the object. + * + * Applies xattr changes to the object and the stripes if the latter exist. + * + * \param[in] env execution environment + * \param[in] dt object + * \param[in] buf buffer pointing to the new value of xattr + * \param[in] name name of xattr + * \param[in] fl flags + * \param[in] th transaction handle + * \param[in] capa not used currently + * + * \retval 0 on success + * \retval negative if failed + */ +static int lod_xattr_set_internal(const struct lu_env *env, + struct dt_object *dt, + const struct lu_buf *buf, + const char *name, int fl, struct thandle *th, + struct lustre_capa *capa) +{ + struct dt_object *next = dt_object_child(dt); + struct lod_object *lo = lod_dt_obj(dt); + int rc; + int i; + ENTRY; + + rc = dt_xattr_set(env, next, buf, name, fl, th, capa); + if (rc != 0 || !S_ISDIR(dt->do_lu.lo_header->loh_attr)) + RETURN(rc); + + /* Note: Do not set LinkEA on sub-stripes, otherwise + * it will confuse the fid2path process(see mdt_path_current()). + * The linkEA between master and sub-stripes is set in + * lod_xattr_set_lmv(). */ + if (lo->ldo_stripenr == 0 || strcmp(name, XATTR_NAME_LINK) == 0) + RETURN(0); + + for (i = 0; i < lo->ldo_stripenr; i++) { + LASSERT(lo->ldo_stripe[i]); + rc = dt_xattr_set(env, lo->ldo_stripe[i], buf, name, fl, th, + capa); + if (rc != 0) + break; + } + + RETURN(rc); +} + +/** + * Delete an extended attribute. + * + * Deletes specified xattr from the object and the stripes if the latter exist. + * + * \param[in] env execution environment + * \param[in] dt object + * \param[in] name name of xattr + * \param[in] th transaction handle + * \param[in] capa not used currently + * + * \retval 0 on success + * \retval negative if failed + */ +static int lod_xattr_del_internal(const struct lu_env *env, + struct dt_object *dt, + const char *name, struct thandle *th, + struct lustre_capa *capa) +{ + struct dt_object *next = dt_object_child(dt); + struct lod_object *lo = lod_dt_obj(dt); + int rc; + int i; + ENTRY; + + rc = dt_xattr_del(env, next, name, th, capa); + if (rc != 0 || !S_ISDIR(dt->do_lu.lo_header->loh_attr)) + RETURN(rc); + + if (lo->ldo_stripenr == 0) + RETURN(rc); + + for (i = 0; i < lo->ldo_stripenr; i++) { + LASSERT(lo->ldo_stripe[i]); + rc = dt_xattr_del(env, lo->ldo_stripe[i], name, th, + capa); + if (rc != 0) + break; + } RETURN(rc); } +/** + * Set default striping on a directory. + * + * Sets specified striping on a directory object unless it matches the default + * striping (LOVEA_DELETE_VALUES() macro). In the latter case remove existing + * EA. This striping will be used when regular file is being created in this + * directory. + * + * \param[in] env execution environment + * \param[in] dt the striped object + * \param[in] buf buffer with the striping + * \param[in] name name of EA + * \param[in] fl xattr flag (see OSD API description) + * \param[in] th transaction handle + * \param[in] capa not used + * + * \retval 0 on success + * \retval negative if failed + */ static int lod_xattr_set_lov_on_dir(const struct lu_env *env, struct dt_object *dt, const struct lu_buf *buf, @@ -469,30 +2256,30 @@ static int lod_xattr_set_lov_on_dir(const struct lu_env *env, struct lustre_capa *capa) { struct lod_device *d = lu2lod_dev(dt->do_lu.lo_dev); - struct dt_object *next = dt_object_child(dt); struct lod_object *l = lod_dt_obj(dt); struct lov_user_md_v1 *lum; struct lov_user_md_v3 *v3 = NULL; + const char *pool_name = NULL; int rc; ENTRY; - LASSERT(l->ldo_stripe == NULL); - l->ldo_striping_cached = 0; - l->ldo_def_striping_set = 0; - lod_object_set_pool(l, NULL); - l->ldo_def_stripe_size = 0; - l->ldo_def_stripenr = 0; - - LASSERT(buf); - LASSERT(buf->lb_buf); + /* If it is striped dir, we should clear the stripe cache for + * slave stripe as well, but there are no effective way to + * notify the LOD on the slave MDT, so we do not cache stripe + * information for slave stripe for now. XXX*/ + lod_lov_stripe_cache_clear(l); + LASSERT(buf != NULL && buf->lb_buf != NULL); lum = buf->lb_buf; - rc = lod_verify_striping(d, buf, 0); + rc = lod_verify_striping(d, buf, false); if (rc) RETURN(rc); - if (lum->lmm_magic == LOV_USER_MAGIC_V3) + if (lum->lmm_magic == LOV_USER_MAGIC_V3) { v3 = buf->lb_buf; + if (v3->lmm_pool_name[0] != '\0') + pool_name = v3->lmm_pool_name; + } /* if { size, offset, count } = { 0, -1, 0 } and no pool * (i.e. all default values specified) then delete default @@ -504,39 +2291,487 @@ static int lod_xattr_set_lov_on_dir(const struct lu_env *env, (int)lum->lmm_stripe_offset, v3 ? "from" : "", v3 ? v3->lmm_pool_name : ""); - if (LOVEA_DELETE_VALUES((lum->lmm_stripe_size), - (lum->lmm_stripe_count), - (lum->lmm_stripe_offset)) && - lum->lmm_magic == LOV_USER_MAGIC_V1) { - rc = dt_xattr_del(env, next, name, th, capa); + if (LOVEA_DELETE_VALUES(lum->lmm_stripe_size, lum->lmm_stripe_count, + lum->lmm_stripe_offset, pool_name)) { + rc = lod_xattr_del_internal(env, dt, name, th, capa); + if (rc == -ENODATA) + rc = 0; + } else { + rc = lod_xattr_set_internal(env, dt, buf, name, fl, th, capa); + } + + RETURN(rc); +} + +/** + * Set default striping on a directory object. + * + * Sets specified striping on a directory object unless it matches the default + * striping (LOVEA_DELETE_VALUES() macro). In the latter case remove existing + * EA. This striping will be used when a new directory is being created in the + * directory. + * + * \param[in] env execution environment + * \param[in] dt the striped object + * \param[in] buf buffer with the striping + * \param[in] name name of EA + * \param[in] fl xattr flag (see OSD API description) + * \param[in] th transaction handle + * \param[in] capa not used + * + * \retval 0 on success + * \retval negative if failed + */ +static int lod_xattr_set_default_lmv_on_dir(const struct lu_env *env, + struct dt_object *dt, + const struct lu_buf *buf, + const char *name, int fl, + struct thandle *th, + struct lustre_capa *capa) +{ + struct lod_object *l = lod_dt_obj(dt); + struct lmv_user_md_v1 *lum; + int rc; + ENTRY; + + LASSERT(buf != NULL && buf->lb_buf != NULL); + lum = buf->lb_buf; + + CDEBUG(D_OTHER, "set default stripe_count # %u stripe_offset %d\n", + le32_to_cpu(lum->lum_stripe_count), + (int)le32_to_cpu(lum->lum_stripe_offset)); + + if (LMVEA_DELETE_VALUES((le32_to_cpu(lum->lum_stripe_count)), + le32_to_cpu(lum->lum_stripe_offset)) && + le32_to_cpu(lum->lum_magic) == LMV_USER_MAGIC) { + rc = lod_xattr_del_internal(env, dt, name, th, capa); if (rc == -ENODATA) rc = 0; } else { - rc = dt_xattr_set(env, next, buf, name, fl, th, capa); + rc = lod_xattr_set_internal(env, dt, buf, name, fl, th, capa); + if (rc != 0) + RETURN(rc); + } + + /* Update default stripe cache */ + if (l->ldo_dir_stripe == NULL) { + OBD_ALLOC_PTR(l->ldo_dir_stripe); + if (l->ldo_dir_stripe == NULL) + RETURN(-ENOMEM); + } + + l->ldo_dir_striping_cached = 0; + l->ldo_dir_def_striping_set = 1; + l->ldo_dir_def_stripenr = le32_to_cpu(lum->lum_stripe_count); + + RETURN(rc); +} + +/** + * Turn directory into a striped directory. + * + * During replay the client sends the striping created before MDT + * failure, then the layer above LOD sends this defined striping + * using ->do_xattr_set(), so LOD uses this method to replay creation + * of the stripes. Notice the original information for the striping + * (#stripes, FIDs, etc) was transfered in declare path. + * + * \param[in] env execution environment + * \param[in] dt the striped object + * \param[in] buf not used currently + * \param[in] name not used currently + * \param[in] fl xattr flag (see OSD API description) + * \param[in] th transaction handle + * \param[in] capa not used + * + * \retval 0 on success + * \retval negative if failed + */ +static int lod_xattr_set_lmv(const struct lu_env *env, struct dt_object *dt, + const struct lu_buf *buf, const char *name, + int fl, struct thandle *th, + struct lustre_capa *capa) +{ + struct lod_object *lo = lod_dt_obj(dt); + struct lod_thread_info *info = lod_env_info(env); + struct lu_attr *attr = &info->lti_attr; + struct dt_object_format *dof = &info->lti_format; + struct lu_buf lmv_buf; + struct lu_buf slave_lmv_buf; + struct lmv_mds_md_v1 *lmm; + struct lmv_mds_md_v1 *slave_lmm = NULL; + struct dt_insert_rec *rec = &info->lti_dt_rec; + int i; + int rc; + ENTRY; + + if (!S_ISDIR(dt->do_lu.lo_header->loh_attr)) + RETURN(-ENOTDIR); + + /* The stripes are supposed to be allocated in declare phase, + * if there are no stripes being allocated, it will skip */ + if (lo->ldo_stripenr == 0) + RETURN(0); + + rc = dt_attr_get(env, dt_object_child(dt), attr, BYPASS_CAPA); + if (rc != 0) + RETURN(rc); + + attr->la_valid = LA_TYPE | LA_MODE; + dof->dof_type = DFT_DIR; + + rc = lod_prep_lmv_md(env, dt, &lmv_buf); + if (rc != 0) + RETURN(rc); + lmm = lmv_buf.lb_buf; + + OBD_ALLOC_PTR(slave_lmm); + if (slave_lmm == NULL) + RETURN(-ENOMEM); + + lod_prep_slave_lmv_md(slave_lmm, lmm); + slave_lmv_buf.lb_buf = slave_lmm; + slave_lmv_buf.lb_len = sizeof(*slave_lmm); + + rec->rec_type = S_IFDIR; + for (i = 0; i < lo->ldo_stripenr; i++) { + struct dt_object *dto; + char *stripe_name = info->lti_key; + struct lu_name *sname; + struct linkea_data ldata = { 0 }; + struct lu_buf linkea_buf; + + dto = lo->ldo_stripe[i]; + dt_write_lock(env, dto, MOR_TGT_CHILD); + rc = dt_create(env, dto, attr, NULL, dof, th); + dt_write_unlock(env, dto); + if (rc != 0) + RETURN(rc); + + rec->rec_fid = lu_object_fid(&dto->do_lu); + rc = dt_insert(env, dto, (const struct dt_rec *)rec, + (const struct dt_key *)dot, th, capa, 0); + if (rc != 0) + RETURN(rc); + + rec->rec_fid = lu_object_fid(&dt->do_lu); + rc = dt_insert(env, dto, (struct dt_rec *)rec, + (const struct dt_key *)dotdot, th, capa, 0); + if (rc != 0) + RETURN(rc); + + if (lo->ldo_striping_cached && + !LOVEA_DELETE_VALUES(lo->ldo_def_stripe_size, + lo->ldo_def_stripenr, + lo->ldo_def_stripe_offset, + lo->ldo_pool)) { + struct lov_user_md_v3 *v3; + + /* sigh, lti_ea_store has been used for lmv_buf, + * so we have to allocate buffer for default + * stripe EA */ + OBD_ALLOC_PTR(v3); + if (v3 == NULL) + GOTO(out, rc); + + memset(v3, 0, sizeof(*v3)); + v3->lmm_magic = cpu_to_le32(LOV_USER_MAGIC_V3); + v3->lmm_stripe_count = + cpu_to_le16(lo->ldo_def_stripenr); + v3->lmm_stripe_offset = + cpu_to_le16(lo->ldo_def_stripe_offset); + v3->lmm_stripe_size = + cpu_to_le32(lo->ldo_def_stripe_size); + if (lo->ldo_pool != NULL) + strlcpy(v3->lmm_pool_name, lo->ldo_pool, + sizeof(v3->lmm_pool_name)); + + info->lti_buf.lb_buf = v3; + info->lti_buf.lb_len = sizeof(*v3); + rc = dt_xattr_set(env, dto, &info->lti_buf, + XATTR_NAME_LOV, 0, th, capa); + OBD_FREE_PTR(v3); + if (rc != 0) + GOTO(out, rc); + } + + if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_SLAVE_LMV) || + cfs_fail_val != i) { + if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_SLAVE_LMV) && + cfs_fail_val == i) + slave_lmm->lmv_master_mdt_index = + cpu_to_le32(i + 1); + else + slave_lmm->lmv_master_mdt_index = + cpu_to_le32(i); + rc = dt_xattr_set(env, dto, &slave_lmv_buf, + XATTR_NAME_LMV, fl, th, capa); + if (rc != 0) + GOTO(out, rc); + } + + if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_SLAVE_NAME) && + cfs_fail_val == i) + snprintf(stripe_name, sizeof(info->lti_key), DFID":%d", + PFID(lu_object_fid(&dto->do_lu)), i + 1); + else + snprintf(stripe_name, sizeof(info->lti_key), DFID":%d", + PFID(lu_object_fid(&dto->do_lu)), i); + + sname = lod_name_get(env, stripe_name, strlen(stripe_name)); + rc = linkea_data_new(&ldata, &info->lti_linkea_buf); + if (rc != 0) + GOTO(out, rc); + + rc = linkea_add_buf(&ldata, sname, lu_object_fid(&dt->do_lu)); + if (rc != 0) + GOTO(out, rc); + + linkea_buf.lb_buf = ldata.ld_buf->lb_buf; + linkea_buf.lb_len = ldata.ld_leh->leh_len; + rc = dt_xattr_set(env, dto, &linkea_buf, XATTR_NAME_LINK, + 0, th, BYPASS_CAPA); + if (rc != 0) + GOTO(out, rc); + + rec->rec_fid = lu_object_fid(&dto->do_lu); + rc = dt_insert(env, dt_object_child(dt), + (const struct dt_rec *)rec, + (const struct dt_key *)stripe_name, th, capa, 0); + if (rc != 0) + GOTO(out, rc); + + rc = dt_ref_add(env, dt_object_child(dt), th); + if (rc != 0) + GOTO(out, rc); } + if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_MASTER_LMV)) + rc = dt_xattr_set(env, dt_object_child(dt), &lmv_buf, + XATTR_NAME_LMV, fl, th, capa); + +out: + if (slave_lmm != NULL) + OBD_FREE_PTR(slave_lmm); + RETURN(rc); } +/** + * Helper function to declare/execute creation of a striped directory + * + * Called in declare/create object path, prepare striping for a directory + * and prepare defaults data striping for the objects to be created in + * that directory. Notice the function calls "declaration" or "execution" + * methods depending on \a declare param. This is a consequence of the + * current approach while we don't have natural distributed transactions: + * we basically execute non-local updates in the declare phase. So, the + * arguments for the both phases are the same and this is the reason for + * this function to exist. + * + * \param[in] env execution environment + * \param[in] dt object + * \param[in] attr attributes the stripes will be created with + * \param[in] dof format of stripes (see OSD API description) + * \param[in] th transaction handle + * \param[in] declare where to call "declare" or "execute" methods + * + * \retval 0 on success + * \retval negative if failed + */ +static int lod_dir_striping_create_internal(const struct lu_env *env, + struct dt_object *dt, + struct lu_attr *attr, + struct dt_object_format *dof, + struct thandle *th, + bool declare) +{ + struct lod_thread_info *info = lod_env_info(env); + struct lod_object *lo = lod_dt_obj(dt); + int rc; + ENTRY; + + if (!LMVEA_DELETE_VALUES(lo->ldo_stripenr, + lo->ldo_dir_stripe_offset)) { + struct lmv_user_md_v1 *v1 = info->lti_ea_store; + int stripe_count = lo->ldo_stripenr; + + if (info->lti_ea_store_size < sizeof(*v1)) { + rc = lod_ea_store_resize(info, sizeof(*v1)); + if (rc != 0) + RETURN(rc); + v1 = info->lti_ea_store; + } + + memset(v1, 0, sizeof(*v1)); + v1->lum_magic = cpu_to_le32(LMV_USER_MAGIC); + v1->lum_stripe_count = cpu_to_le32(stripe_count); + v1->lum_stripe_offset = + cpu_to_le32(lo->ldo_dir_stripe_offset); + + info->lti_buf.lb_buf = v1; + info->lti_buf.lb_len = sizeof(*v1); + + if (declare) + rc = lod_declare_xattr_set_lmv(env, dt, attr, + &info->lti_buf, dof, th); + else + rc = lod_xattr_set_lmv(env, dt, &info->lti_buf, + XATTR_NAME_LMV, 0, th, + BYPASS_CAPA); + if (rc != 0) + RETURN(rc); + } + + /* Transfer default LMV striping from the parent */ + if (lo->ldo_dir_striping_cached && + !LMVEA_DELETE_VALUES(lo->ldo_dir_def_stripenr, + lo->ldo_dir_def_stripe_offset)) { + struct lmv_user_md_v1 *v1 = info->lti_ea_store; + int def_stripe_count = lo->ldo_dir_def_stripenr; + + if (info->lti_ea_store_size < sizeof(*v1)) { + rc = lod_ea_store_resize(info, sizeof(*v1)); + if (rc != 0) + RETURN(rc); + v1 = info->lti_ea_store; + } + + memset(v1, 0, sizeof(*v1)); + v1->lum_magic = cpu_to_le32(LMV_USER_MAGIC); + v1->lum_stripe_count = cpu_to_le32(def_stripe_count); + v1->lum_stripe_offset = + cpu_to_le32(lo->ldo_dir_def_stripe_offset); + v1->lum_hash_type = + cpu_to_le32(lo->ldo_dir_def_hash_type); + + info->lti_buf.lb_buf = v1; + info->lti_buf.lb_len = sizeof(*v1); + if (declare) + rc = lod_dir_declare_xattr_set(env, dt, &info->lti_buf, + XATTR_NAME_DEFAULT_LMV, + 0, th); + else + rc = lod_xattr_set_default_lmv_on_dir(env, dt, + &info->lti_buf, + XATTR_NAME_DEFAULT_LMV, 0, + th, BYPASS_CAPA); + if (rc != 0) + RETURN(rc); + } + + /* Transfer default LOV striping from the parent */ + if (lo->ldo_striping_cached && + !LOVEA_DELETE_VALUES(lo->ldo_def_stripe_size, + lo->ldo_def_stripenr, + lo->ldo_def_stripe_offset, + lo->ldo_pool)) { + struct lov_user_md_v3 *v3 = info->lti_ea_store; + + if (info->lti_ea_store_size < sizeof(*v3)) { + rc = lod_ea_store_resize(info, sizeof(*v3)); + if (rc != 0) + RETURN(rc); + v3 = info->lti_ea_store; + } + + memset(v3, 0, sizeof(*v3)); + v3->lmm_magic = cpu_to_le32(LOV_USER_MAGIC_V3); + v3->lmm_stripe_count = cpu_to_le16(lo->ldo_def_stripenr); + v3->lmm_stripe_offset = cpu_to_le16(lo->ldo_def_stripe_offset); + v3->lmm_stripe_size = cpu_to_le32(lo->ldo_def_stripe_size); + if (lo->ldo_pool != NULL) + strlcpy(v3->lmm_pool_name, lo->ldo_pool, + sizeof(v3->lmm_pool_name)); + + info->lti_buf.lb_buf = v3; + info->lti_buf.lb_len = sizeof(*v3); + + if (declare) + rc = lod_dir_declare_xattr_set(env, dt, &info->lti_buf, + XATTR_NAME_LOV, 0, th); + else + rc = lod_xattr_set_lov_on_dir(env, dt, &info->lti_buf, + XATTR_NAME_LOV, 0, th, + BYPASS_CAPA); + if (rc != 0) + RETURN(rc); + } + + RETURN(0); +} + +static int lod_declare_dir_striping_create(const struct lu_env *env, + struct dt_object *dt, + struct lu_attr *attr, + struct dt_object_format *dof, + struct thandle *th) +{ + return lod_dir_striping_create_internal(env, dt, attr, dof, th, true); +} + +static int lod_dir_striping_create(const struct lu_env *env, + struct dt_object *dt, + struct lu_attr *attr, + struct dt_object_format *dof, + struct thandle *th) +{ + return lod_dir_striping_create_internal(env, dt, attr, dof, th, false); +} + +/** + * Implementation of dt_object_operations::do_xattr_set. + * + * Sets specified extended attribute on the object. Three types of EAs are + * special: + * LOV EA - stores striping for a regular file or default striping (when set + * on a directory) + * LMV EA - stores a marker for the striped directories + * DMV EA - stores default directory striping + * + * When striping is applied to a non-striped existing object (this is called + * late striping), then LOD notices the caller wants to turn the object into a + * striped one. The stripe objects are created and appropriate EA is set: + * LOV EA storing all the stripes directly or LMV EA storing just a small header + * with striping configuration. + * + * \see dt_object_operations::do_xattr_set() in the API description for details. + */ static int lod_xattr_set(const struct lu_env *env, struct dt_object *dt, const struct lu_buf *buf, const char *name, int fl, struct thandle *th, struct lustre_capa *capa) { struct dt_object *next = dt_object_child(dt); - __u32 attr; int rc; ENTRY; - attr = dt->do_lu.lo_header->loh_attr & S_IFMT; - if (S_ISDIR(attr)) { - if (strncmp(name, XATTR_NAME_LOV, strlen(XATTR_NAME_LOV)) == 0) - rc = lod_xattr_set_lov_on_dir(env, dt, buf, name, - fl, th, capa); - else + if (S_ISDIR(dt->do_lu.lo_header->loh_attr) && + strcmp(name, XATTR_NAME_LMV) == 0) { + struct lmv_mds_md_v1 *lmm = buf->lb_buf; + + if (lmm != NULL && le32_to_cpu(lmm->lmv_hash_type) & + LMV_HASH_FLAG_MIGRATION) rc = dt_xattr_set(env, next, buf, name, fl, th, capa); + else + rc = lod_dir_striping_create(env, dt, NULL, NULL, th); + + RETURN(rc); + } - } else if (S_ISREG(attr) && !strcmp(name, XATTR_NAME_LOV)) { + if (S_ISDIR(dt->do_lu.lo_header->loh_attr) && + strcmp(name, XATTR_NAME_LOV) == 0) { + /* default LOVEA */ + rc = lod_xattr_set_lov_on_dir(env, dt, buf, name, fl, th, capa); + RETURN(rc); + } else if (S_ISDIR(dt->do_lu.lo_header->loh_attr) && + strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0) { + /* default LMVEA */ + rc = lod_xattr_set_default_lmv_on_dir(env, dt, buf, name, fl, + th, capa); + RETURN(rc); + } else if (S_ISREG(dt->do_lu.lo_header->loh_attr) && + !strcmp(name, XATTR_NAME_LOV)) { /* in case of lov EA swap, just set it * if not, it is a replay so check striping match what we * already have during req replay, declare_xattr_set() @@ -550,16 +2785,20 @@ static int lod_xattr_set(const struct lu_env *env, rc = lod_striping_create(env, dt, NULL, NULL, th); } RETURN(rc); - } else { - /* - * behave transparantly for all other EAs - */ - rc = dt_xattr_set(env, next, buf, name, fl, th, capa); } + /* then all other xattr */ + rc = lod_xattr_set_internal(env, dt, buf, name, fl, th, capa); + RETURN(rc); } +/** + * Implementation of dt_object_operations::do_declare_xattr_del. + * + * \see dt_object_operations::do_declare_xattr_del() in the API description + * for details. + */ static int lod_declare_xattr_del(const struct lu_env *env, struct dt_object *dt, const char *name, struct thandle *th) @@ -567,6 +2806,14 @@ static int lod_declare_xattr_del(const struct lu_env *env, return dt_declare_xattr_del(env, dt_object_child(dt), name, th); } +/** + * Implementation of dt_object_operations::do_xattr_del. + * + * If EA storing a regular striping is being deleted, then release + * all the references to the stripe objects in core. + * + * \see dt_object_operations::do_xattr_del() in the API description for details. + */ static int lod_xattr_del(const struct lu_env *env, struct dt_object *dt, const char *name, struct thandle *th, struct lustre_capa *capa) @@ -576,13 +2823,32 @@ static int lod_xattr_del(const struct lu_env *env, struct dt_object *dt, return dt_xattr_del(env, dt_object_child(dt), name, th, capa); } +/** + * Implementation of dt_object_operations::do_xattr_list. + * + * \see dt_object_operations::do_xattr_list() in the API description + * for details. + */ static int lod_xattr_list(const struct lu_env *env, - struct dt_object *dt, struct lu_buf *buf, + struct dt_object *dt, const struct lu_buf *buf, struct lustre_capa *capa) { return dt_xattr_list(env, dt_object_child(dt), buf, capa); } +/** + * Initialize a pool the object belongs to. + * + * When a striped object is being created, striping configuration + * may demand the stripes are allocated on a limited set of the + * targets. These limited sets are known as "pools". So we copy + * a pool name into the object and later actual creation methods + * (like lod_object_create()) will use this information to allocate + * the stripes properly. + * + * \param[in] o object + * \param[in] pool pool name + */ int lod_object_set_pool(struct lod_object *o, char *pool) { int len; @@ -607,25 +2873,36 @@ static inline int lod_object_will_be_striped(int is_reg, const struct lu_fid *fi return (is_reg && fid_seq(fid) != FID_SEQ_LOCAL_FILE); } -static int lod_cache_parent_striping(const struct lu_env *env, - struct lod_object *lp) + +/** + * Cache default regular striping in the object. + * + * To improve performance of striped regular object creation we cache + * default LOV striping (if it exists) in the parent directory object. + * + * \param[in] env execution environment + * \param[in] lp object + * + * \retval 0 on success + * \retval negative if failed + */ +static int lod_cache_parent_lov_striping(const struct lu_env *env, + struct lod_object *lp) { + struct lod_thread_info *info = lod_env_info(env); struct lov_user_md_v1 *v1 = NULL; struct lov_user_md_v3 *v3 = NULL; int rc; ENTRY; - /* dt_ah_init() is called from MDD without parent being write locked + /* called from MDD without parent being write locked, * lock it here */ dt_write_lock(env, dt_object_child(&lp->ldo_obj), 0); - if (lp->ldo_striping_cached) - GOTO(unlock, rc = 0); - rc = lod_get_lov_ea(env, lp); if (rc < 0) GOTO(unlock, rc); - if (rc < sizeof(struct lov_user_md)) { + if (rc < (typeof(rc))sizeof(struct lov_user_md)) { /* don't lookup for non-existing or invalid striping */ lp->ldo_def_striping_set = 0; lp->ldo_striping_cached = 1; @@ -635,11 +2912,14 @@ static int lod_cache_parent_striping(const struct lu_env *env, GOTO(unlock, rc = 0); } - v1 = (struct lov_user_md_v1 *)lod_env_info(env)->lti_ea_store; - if (v1->lmm_magic == __swab32(LOV_USER_MAGIC_V1)) + rc = 0; + v1 = info->lti_ea_store; + if (v1->lmm_magic == __swab32(LOV_USER_MAGIC_V1)) { lustre_swab_lov_user_md_v1(v1); - else if (v1->lmm_magic == __swab32(LOV_USER_MAGIC_V3)) + } else if (v1->lmm_magic == __swab32(LOV_USER_MAGIC_V3)) { + v3 = (struct lov_user_md_v3 *)v1; lustre_swab_lov_user_md_v3(v3); + } if (v1->lmm_magic != LOV_MAGIC_V3 && v1->lmm_magic != LOV_MAGIC_V1) GOTO(unlock, rc = 0); @@ -647,23 +2927,75 @@ static int lod_cache_parent_striping(const struct lu_env *env, if (v1->lmm_pattern != LOV_PATTERN_RAID0 && v1->lmm_pattern != 0) GOTO(unlock, rc = 0); + CDEBUG(D_INFO, DFID" stripe_count=%d stripe_size=%d stripe_offset=%d\n", + PFID(lu_object_fid(&lp->ldo_obj.do_lu)), + (int)v1->lmm_stripe_count, + (int)v1->lmm_stripe_size, (int)v1->lmm_stripe_offset); + lp->ldo_def_stripenr = v1->lmm_stripe_count; lp->ldo_def_stripe_size = v1->lmm_stripe_size; lp->ldo_def_stripe_offset = v1->lmm_stripe_offset; lp->ldo_striping_cached = 1; lp->ldo_def_striping_set = 1; - if (v1->lmm_magic == LOV_USER_MAGIC_V3) { /* XXX: sanity check here */ v3 = (struct lov_user_md_v3 *) v1; if (v3->lmm_pool_name[0]) lod_object_set_pool(lp, v3->lmm_pool_name); } + EXIT; +unlock: + dt_write_unlock(env, dt_object_child(&lp->ldo_obj)); + return rc; +} + + +/** + * Cache default directory striping in the object. + * + * To improve performance of striped directory creation we cache default + * directory striping (if it exists) in the parent directory object. + * + * \param[in] env execution environment + * \param[in] lp object + * + * \retval 0 on success + * \retval negative if failed + */ +static int lod_cache_parent_lmv_striping(const struct lu_env *env, + struct lod_object *lp) +{ + struct lod_thread_info *info = lod_env_info(env); + struct lmv_user_md_v1 *v1 = NULL; + int rc; + ENTRY; + + /* called from MDD without parent being write locked, + * lock it here */ + dt_write_lock(env, dt_object_child(&lp->ldo_obj), 0); + rc = lod_get_default_lmv_ea(env, lp); + if (rc < 0) + GOTO(unlock, rc); + + if (rc < (typeof(rc))sizeof(struct lmv_user_md)) { + /* don't lookup for non-existing or invalid striping */ + lp->ldo_dir_def_striping_set = 0; + lp->ldo_dir_striping_cached = 1; + lp->ldo_dir_def_stripenr = 0; + lp->ldo_dir_def_stripe_offset = + (typeof(v1->lum_stripe_offset))(-1); + lp->ldo_dir_def_hash_type = LMV_HASH_TYPE_FNV_1A_64; + GOTO(unlock, rc = 0); + } + + rc = 0; + v1 = info->lti_ea_store; - CDEBUG(D_OTHER, "def. striping: # %d, sz %d, off %d %s%s on "DFID"\n", - lp->ldo_def_stripenr, lp->ldo_def_stripe_size, - lp->ldo_def_stripe_offset, v3 ? "from " : "", - v3 ? lp->ldo_pool : "", PFID(lu_object_fid(&lp->ldo_obj.do_lu))); + lp->ldo_dir_def_stripenr = le32_to_cpu(v1->lum_stripe_count); + lp->ldo_dir_def_stripe_offset = le32_to_cpu(v1->lum_stripe_offset); + lp->ldo_dir_def_hash_type = le32_to_cpu(v1->lum_hash_type); + lp->ldo_dir_def_striping_set = 1; + lp->ldo_dir_striping_cached = 1; EXIT; unlock: @@ -672,13 +3004,62 @@ unlock: } /** - * used to transfer default striping data to the object being created + * Cache default striping in the object. + * + * To improve performance of striped object creation we cache default striping + * (if it exists) in the parent directory object. We always cache default + * striping for the regular files (stored in LOV EA) and we cache default + * striping for the directories if requested by \a child_mode (when a new + * directory is being created). + * + * \param[in] env execution environment + * \param[in] lp object + * \param[in] child_mode new object's mode + * + * \retval 0 on success + * \retval negative if failed + */ +static int lod_cache_parent_striping(const struct lu_env *env, + struct lod_object *lp, + umode_t child_mode) +{ + int rc = 0; + ENTRY; + + rc = lod_load_striping(env, lp); + if (rc != 0) + RETURN(rc); + + if (!lp->ldo_striping_cached) { + /* we haven't tried to get default striping for + * the directory yet, let's cache it in the object */ + rc = lod_cache_parent_lov_striping(env, lp); + if (rc != 0) + RETURN(rc); + } + + if (S_ISDIR(child_mode) && !lp->ldo_dir_striping_cached) + rc = lod_cache_parent_lmv_striping(env, lp); + + RETURN(rc); +} + +/** + * Implementation of dt_object_operations::do_ah_init. + * + * This method is used to make a decision on the striping configuration for the + * object being created. It can be taken from the \a parent object if it exists, + * or filesystem's default. The resulting configuration (number of stripes, + * stripe size/offset, pool name, etc) is stored in the object itself and will + * be used by the methods like ->doo_declare_create(). + * + * \see dt_object_operations::do_ah_init() in the API description for details. */ static void lod_ah_init(const struct lu_env *env, struct dt_allocation_hint *ah, struct dt_object *parent, struct dt_object *child, - cfs_umode_t child_mode) + umode_t child_mode) { struct lod_device *d = lu2lod_dev(child->do_lu.lo_dev); struct dt_object *nextp = NULL; @@ -686,6 +3067,7 @@ static void lod_ah_init(const struct lu_env *env, struct lod_object *lp = NULL; struct lod_object *lc; struct lov_desc *desc; + int rc; ENTRY; LASSERT(child); @@ -693,6 +3075,9 @@ static void lod_ah_init(const struct lu_env *env, if (likely(parent)) { nextp = dt_object_child(parent); lp = lod_dt_obj(parent); + rc = lod_load_striping(env, lp); + if (rc != 0) + return; } nextc = dt_object_child(child); @@ -706,15 +3091,30 @@ static void lod_ah_init(const struct lu_env *env, * in case of late striping creation, ->ah_init() * can be called with local object existing */ - if (!dt_object_exists(nextc) || dt_object_remote(nextc)) - nextc->do_ops->do_ah_init(env, ah, nextp, nextc, child_mode); + if (!dt_object_exists(nextc) || dt_object_remote(nextc)) { + struct dt_object *obj; + + obj = (nextp != NULL && dt_object_remote(nextp)) ? NULL : nextp; + nextc->do_ops->do_ah_init(env, ah, obj, nextc, child_mode); + } if (S_ISDIR(child_mode)) { - if (lp->ldo_striping_cached == 0) { - /* we haven't tried to get default striping for - * the directory yet, let's cache it in the object */ - lod_cache_parent_striping(env, lp); + if (lc->ldo_dir_stripe == NULL) { + OBD_ALLOC_PTR(lc->ldo_dir_stripe); + if (lc->ldo_dir_stripe == NULL) + return; + } + + if (lp->ldo_dir_stripe == NULL) { + OBD_ALLOC_PTR(lp->ldo_dir_stripe); + if (lp->ldo_dir_stripe == NULL) + return; } + + rc = lod_cache_parent_striping(env, lp, child_mode); + if (rc != 0) + return; + /* transfer defaults to new directory */ if (lp->ldo_striping_cached) { if (lp->ldo_pool) @@ -725,11 +3125,66 @@ static void lod_ah_init(const struct lu_env *env, lc->ldo_striping_cached = 1; lc->ldo_def_striping_set = 1; CDEBUG(D_OTHER, "inherite EA sz:%d off:%d nr:%d\n", - (int)lc->ldo_def_stripenr, (int)lc->ldo_def_stripe_size, - (int)lc->ldo_def_stripe_offset); + (int)lc->ldo_def_stripe_offset, + (int)lc->ldo_def_stripenr); + } + + /* transfer dir defaults to new directory */ + if (lp->ldo_dir_striping_cached) { + lc->ldo_dir_def_stripenr = lp->ldo_dir_def_stripenr; + lc->ldo_dir_def_stripe_offset = + lp->ldo_dir_def_stripe_offset; + lc->ldo_dir_def_hash_type = + lp->ldo_dir_def_hash_type; + lc->ldo_dir_striping_cached = 1; + lc->ldo_dir_def_striping_set = 1; + CDEBUG(D_INFO, "inherit default EA nr:%d off:%d t%u\n", + (int)lc->ldo_dir_def_stripenr, + (int)lc->ldo_dir_def_stripe_offset, + lc->ldo_dir_def_hash_type); + } + + /* It should always honour the specified stripes */ + if (ah->dah_eadata != NULL && ah->dah_eadata_len != 0) { + const struct lmv_user_md_v1 *lum1 = ah->dah_eadata; + + rc = lod_verify_md_striping(d, lum1); + if (rc == 0 && + le32_to_cpu(lum1->lum_stripe_count) > 1) { + /* Directory will be striped only if + * stripe_count > 1 */ + lc->ldo_stripenr = + le32_to_cpu(lum1->lum_stripe_count); + lc->ldo_dir_stripe_offset = + le32_to_cpu(lum1->lum_stripe_offset); + lc->ldo_dir_hash_type = + le32_to_cpu(lum1->lum_hash_type); + CDEBUG(D_INFO, "set stripe EA nr:%hu off:%d\n", + lc->ldo_stripenr, + (int)lc->ldo_dir_stripe_offset); + } + /* then check whether there is default stripes from parent */ + } else if (lp->ldo_dir_def_striping_set) { + /* If there are default dir stripe from parent */ + lc->ldo_stripenr = lp->ldo_dir_def_stripenr; + lc->ldo_dir_stripe_offset = + lp->ldo_dir_def_stripe_offset; + lc->ldo_dir_hash_type = + lp->ldo_dir_def_hash_type; + CDEBUG(D_INFO, "inherit EA nr:%hu off:%d\n", + lc->ldo_stripenr, + (int)lc->ldo_dir_stripe_offset); + } else { + /* set default stripe for this directory */ + lc->ldo_stripenr = 0; + lc->ldo_dir_stripe_offset = -1; } - return; + + CDEBUG(D_INFO, "final striping count:%hu, offset:%d\n", + lc->ldo_stripenr, (int)lc->ldo_dir_stripe_offset); + + goto out; } /* @@ -739,19 +3194,14 @@ static void lod_ah_init(const struct lu_env *env, */ if (!lod_object_will_be_striped(S_ISREG(child_mode), lu_object_fid(&child->do_lu))) - return; - + goto out; /* * try from the parent */ if (likely(parent)) { - if (lp->ldo_striping_cached == 0) { - /* we haven't tried to get default striping for - * the directory yet, let's cache it in the object */ - lod_cache_parent_striping(env, lp); - } + lod_cache_parent_striping(env, lp, child_mode); - lc->ldo_def_stripe_offset = (__u16) -1; + lc->ldo_def_stripe_offset = LOV_OFFSET_DEFAULT; if (lp->ldo_def_striping_set) { if (lp->ldo_pool) @@ -777,15 +3227,31 @@ static void lod_ah_init(const struct lu_env *env, lc->ldo_stripenr, lc->ldo_stripe_size, lc->ldo_pool ? lc->ldo_pool : ""); +out: + /* we do not cache stripe information for slave stripe, see + * lod_xattr_set_lov_on_dir */ + if (lp != NULL && lp->ldo_dir_slave_stripe) + lod_lov_stripe_cache_clear(lp); + EXIT; } #define ll_do_div64(aaa,bbb) do_div((aaa), (bbb)) -/* - * this function handles a special case when truncate was done - * on a stripeless object and now striping is being created - * we can't lose that size, so we have to propagate it to newly - * created object +/** + * Size initialization on late striping. + * + * Propagate the size of a truncated object to a deferred striping. + * This function handles a special case when truncate was done on a + * non-striped object and now while the striping is being created + * we can't lose that size, so we have to propagate it to the stripes + * being created. + * + * \param[in] env execution environment + * \param[in] dt object + * \param[in] th transaction handle + * + * \retval 0 on success + * \retval negative if failed */ static int lod_declare_init_size(const struct lu_env *env, struct dt_object *dt, struct thandle *th) @@ -826,9 +3292,24 @@ static int lod_declare_init_size(const struct lu_env *env, RETURN(rc); } - /** - * Create declaration of striped object + * Declare creation of striped object. + * + * The function declares creation stripes for a regular object. The function + * also declares whether the stripes will be created with non-zero size if + * previously size was set non-zero on the master object. If object \a dt is + * not local, then only fully defined striping can be applied in \a lovea. + * Otherwise \a lovea can be in the form of pattern, see lod_qos_parse_config() + * for the details. + * + * \param[in] env execution environment + * \param[in] dt object + * \param[in] attr attributes the stripes will be created with + * \param[in] lovea a buffer containing striping description + * \param[in] th transaction handle + * + * \retval 0 on success + * \retval negative if failed */ int lod_declare_striped_object(const struct lu_env *env, struct dt_object *dt, struct lu_attr *attr, @@ -847,22 +3328,33 @@ int lod_declare_striped_object(const struct lu_env *env, struct dt_object *dt, GOTO(out, rc = -ENOMEM); } - /* choose OST and generate appropriate objects */ - rc = lod_qos_prep_create(env, lo, attr, lovea, th); - if (rc) { - /* failed to create striping, let's reset - * config so that others don't get confused */ - lod_object_free_striping(env, lo); - GOTO(out, rc); - } + if (!dt_object_remote(next)) { + /* choose OST and generate appropriate objects */ + rc = lod_qos_prep_create(env, lo, attr, lovea, th); + if (rc) { + /* failed to create striping, let's reset + * config so that others don't get confused */ + lod_object_free_striping(env, lo); + GOTO(out, rc); + } - /* - * declare storage for striping data - */ - info->lti_buf.lb_len = lov_mds_md_size(lo->ldo_stripenr, + /* + * declare storage for striping data + */ + info->lti_buf.lb_len = lov_mds_md_size(lo->ldo_stripenr, lo->ldo_pool ? LOV_MAGIC_V3 : LOV_MAGIC_V1); - rc = dt_declare_xattr_set(env, next, &info->lti_buf, XATTR_NAME_LOV, - 0, th); + } else { + /* LOD can not choose OST objects for remote objects, i.e. + * stripes must be ready before that. Right now, it can only + * happen during migrate, i.e. migrate process needs to create + * remote regular file (mdd_migrate_create), then the migrate + * process will provide stripeEA. */ + LASSERT(lovea != NULL); + info->lti_buf = *lovea; + } + + rc = dt_declare_xattr_set(env, next, &info->lti_buf, + XATTR_NAME_LOV, 0, th); if (rc) GOTO(out, rc); @@ -878,6 +3370,17 @@ out: RETURN(rc); } +/** + * Implementation of dt_object_operations::do_declare_create. + * + * The method declares creation of a new object. If the object will be striped, + * then helper functions are called to find FIDs for the stripes, declare + * creation of the stripes and declare initialization of the striping + * information to be stored in the master object. + * + * \see dt_object_operations::do_declare_create() in the API description + * for details. + */ static int lod_declare_object_create(const struct lu_env *env, struct dt_object *dt, struct lu_attr *attr, @@ -917,44 +3420,36 @@ static int lod_declare_object_create(const struct lu_env *env, if (lo->ldo_stripenr > 0) rc = lod_declare_striped_object(env, dt, attr, NULL, th); - } else if (dof->dof_type == DFT_DIR && lo->ldo_striping_cached) { - struct lod_thread_info *info = lod_env_info(env); - - struct lov_user_md_v3 *v3; - - if (LOVEA_DELETE_VALUES(lo->ldo_def_stripe_size, - lo->ldo_def_stripenr, - lo->ldo_def_stripe_offset)) - RETURN(0); - - OBD_ALLOC_PTR(v3); - if (v3 == NULL) - RETURN(-ENOMEM); - - v3->lmm_magic = cpu_to_le32(LOV_MAGIC_V3); - v3->lmm_pattern = cpu_to_le32(LOV_PATTERN_RAID0); - fid_to_lmm_oi(lu_object_fid(&dt->do_lu), &v3->lmm_oi); - lmm_oi_cpu_to_le(&v3->lmm_oi, &v3->lmm_oi); - v3->lmm_stripe_size = cpu_to_le32(lo->ldo_def_stripe_size); - v3->lmm_stripe_count = cpu_to_le32(lo->ldo_def_stripenr); - v3->lmm_stripe_offset = cpu_to_le16(lo->ldo_def_stripe_offset); - if (lo->ldo_pool) - strncpy(v3->lmm_pool_name, lo->ldo_pool, - LOV_MAXPOOLNAME); - - info->lti_buf.lb_buf = v3; - info->lti_buf.lb_len = sizeof(*v3); - - /* to transfer default striping from the parent */ - rc = dt_declare_xattr_set(env, next, &info->lti_buf, - XATTR_NAME_LOV, 0, th); - OBD_FREE_PTR(v3); + } else if (dof->dof_type == DFT_DIR) { + /* Orphan object (like migrating object) does not have + * lod_dir_stripe, see lod_ah_init */ + if (lo->ldo_dir_stripe != NULL) + rc = lod_declare_dir_striping_create(env, dt, attr, + dof, th); } - out: RETURN(rc); } +/** + * Creation of a striped regular object. + * + * The function is called to create the stripe objects for a regular + * striped file. This can happen at the initial object creation or + * when the caller asks LOD to do so using ->do_xattr_set() method + * (so called late striping). Notice all the information are already + * prepared in the form of the list of objects (ldo_stripe field). + * This is done during declare phase. + * + * \param[in] env execution environment + * \param[in] dt object + * \param[in] attr attributes the stripes will be created with + * \param[in] dof format of stripes (see OSD API description) + * \param[in] th transaction handle + * + * \retval 0 on success + * \retval negative if failed + */ int lod_striping_create(const struct lu_env *env, struct dt_object *dt, struct lu_attr *attr, struct dt_object_format *dof, struct thandle *th) @@ -979,6 +3474,15 @@ int lod_striping_create(const struct lu_env *env, struct dt_object *dt, RETURN(rc); } +/** + * Implementation of dt_object_operations::do_create. + * + * If any of preceeding methods (like ->do_declare_create(), + * ->do_ah_init(), etc) chose to create a striped object, + * then this method will create the master and the stripes. + * + * \see dt_object_operations::do_create() in the API description for details. + */ static int lod_object_create(const struct lu_env *env, struct dt_object *dt, struct lu_attr *attr, struct dt_allocation_hint *hint, @@ -991,34 +3495,39 @@ static int lod_object_create(const struct lu_env *env, struct dt_object *dt, /* create local object */ rc = dt_create(env, next, attr, hint, dof, th); + if (rc != 0) + RETURN(rc); - if (rc == 0) { - if (S_ISDIR(dt->do_lu.lo_header->loh_attr)) - rc = lod_store_def_striping(env, dt, th); - else if (lo->ldo_stripe) - rc = lod_striping_create(env, dt, attr, dof, th); - } + if (S_ISREG(dt->do_lu.lo_header->loh_attr) && + lo->ldo_stripe && dof->u.dof_reg.striped != 0) + rc = lod_striping_create(env, dt, attr, dof, th); RETURN(rc); } +/** + * Implementation of dt_object_operations::do_declare_destroy. + * + * If the object is a striped directory, then the function declares reference + * removal from the master object (this is an index) to the stripes and declares + * destroy of all the stripes. In all the cases, it declares an intention to + * destroy the object itself. + * + * \see dt_object_operations::do_declare_destroy() in the API description + * for details. + */ static int lod_declare_object_destroy(const struct lu_env *env, struct dt_object *dt, struct thandle *th) { struct dt_object *next = dt_object_child(dt); struct lod_object *lo = lod_dt_obj(dt); + struct lod_thread_info *info = lod_env_info(env); + char *stripe_name = info->lti_key; int rc, i; ENTRY; /* - * we declare destroy for the local object - */ - rc = dt_declare_destroy(env, next, th); - if (rc) - RETURN(rc); - - /* * load striping information, notice we don't do this when object * is being initialized as we don't need this information till * few specific cases like destroy, chown @@ -1028,82 +3537,166 @@ static int lod_declare_object_destroy(const struct lu_env *env, RETURN(rc); /* declare destroy for all underlying objects */ - for (i = 0; i < lo->ldo_stripenr; i++) { - LASSERT(lo->ldo_stripe[i]); - rc = dt_declare_destroy(env, lo->ldo_stripe[i], th); + if (S_ISDIR(dt->do_lu.lo_header->loh_attr)) { + rc = next->do_ops->do_index_try(env, next, + &dt_directory_features); + if (rc != 0) + RETURN(rc); - if (rc) - break; + for (i = 0; i < lo->ldo_stripenr; i++) { + rc = dt_declare_ref_del(env, next, th); + if (rc != 0) + RETURN(rc); + snprintf(stripe_name, sizeof(info->lti_key), DFID":%d", + PFID(lu_object_fid(&lo->ldo_stripe[i]->do_lu)), + i); + rc = dt_declare_delete(env, next, + (const struct dt_key *)stripe_name, th); + if (rc != 0) + RETURN(rc); + } + } + /* + * we declare destroy for the local object + */ + rc = dt_declare_destroy(env, next, th); + if (rc) + RETURN(rc); + + if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_MDTOBJ)) + RETURN(0); + + /* declare destroy all striped objects */ + for (i = 0; i < lo->ldo_stripenr; i++) { + if (likely(lo->ldo_stripe[i] != NULL)) { + rc = dt_declare_destroy(env, lo->ldo_stripe[i], th); + if (rc != 0) + break; + } } RETURN(rc); } +/** + * Implementation of dt_object_operations::do_destroy. + * + * If the object is a striped directory, then the function removes references + * from the master object (this is an index) to the stripes and destroys all + * the stripes. In all the cases, the function destroys the object itself. + * + * \see dt_object_operations::do_destroy() in the API description for details. + */ static int lod_object_destroy(const struct lu_env *env, struct dt_object *dt, struct thandle *th) { struct dt_object *next = dt_object_child(dt); struct lod_object *lo = lod_dt_obj(dt); - int rc, i; + struct lod_thread_info *info = lod_env_info(env); + char *stripe_name = info->lti_key; + unsigned int i; + int rc; ENTRY; - /* destroy local object */ - rc = dt_destroy(env, next, th); - if (rc) - RETURN(rc); + /* destroy sub-stripe of master object */ + if (S_ISDIR(dt->do_lu.lo_header->loh_attr)) { + rc = next->do_ops->do_index_try(env, next, + &dt_directory_features); + if (rc != 0) + RETURN(rc); - /* destroy all underlying objects */ - for (i = 0; i < lo->ldo_stripenr; i++) { - LASSERT(lo->ldo_stripe[i]); - rc = dt_destroy(env, lo->ldo_stripe[i], th); - if (rc) - break; - } + for (i = 0; i < lo->ldo_stripenr; i++) { + rc = dt_ref_del(env, next, th); + if (rc != 0) + RETURN(rc); - RETURN(rc); -} + snprintf(stripe_name, sizeof(info->lti_key), DFID":%d", + PFID(lu_object_fid(&lo->ldo_stripe[i]->do_lu)), + i); -static int lod_index_try(const struct lu_env *env, struct dt_object *dt, - const struct dt_index_features *feat) -{ - struct dt_object *next = dt_object_child(dt); - int rc; - ENTRY; + CDEBUG(D_INFO, DFID" delete stripe %s "DFID"\n", + PFID(lu_object_fid(&dt->do_lu)), stripe_name, + PFID(lu_object_fid(&lo->ldo_stripe[i]->do_lu))); - LASSERT(next->do_ops); - LASSERT(next->do_ops->do_index_try); + rc = dt_delete(env, next, + (const struct dt_key *)stripe_name, + th, BYPASS_CAPA); + if (rc != 0) + RETURN(rc); + } + } + rc = dt_destroy(env, next, th); + if (rc != 0) + RETURN(rc); - rc = next->do_ops->do_index_try(env, next, feat); - if (next->do_index_ops && dt->do_index_ops == NULL) - dt->do_index_ops = &lod_index_ops; + if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_MDTOBJ)) + RETURN(0); + + /* destroy all striped objects */ + for (i = 0; i < lo->ldo_stripenr; i++) { + if (likely(lo->ldo_stripe[i] != NULL) && + (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_SPEOBJ) || + i == cfs_fail_val)) { + rc = dt_destroy(env, lo->ldo_stripe[i], th); + if (rc != 0) + break; + } + } RETURN(rc); } +/** + * Implementation of dt_object_operations::do_declare_ref_add. + * + * \see dt_object_operations::do_declare_ref_add() in the API description + * for details. + */ static int lod_declare_ref_add(const struct lu_env *env, struct dt_object *dt, struct thandle *th) { return dt_declare_ref_add(env, dt_object_child(dt), th); } +/** + * Implementation of dt_object_operations::do_ref_add. + * + * \see dt_object_operations::do_ref_add() in the API description for details. + */ static int lod_ref_add(const struct lu_env *env, struct dt_object *dt, struct thandle *th) { return dt_ref_add(env, dt_object_child(dt), th); } +/** + * Implementation of dt_object_operations::do_declare_ref_del. + * + * \see dt_object_operations::do_declare_ref_del() in the API description + * for details. + */ static int lod_declare_ref_del(const struct lu_env *env, struct dt_object *dt, struct thandle *th) { return dt_declare_ref_del(env, dt_object_child(dt), th); } +/** + * Implementation of dt_object_operations::do_ref_del + * + * \see dt_object_operations::do_ref_del() in the API description for details. + */ static int lod_ref_del(const struct lu_env *env, struct dt_object *dt, struct thandle *th) { return dt_ref_del(env, dt_object_child(dt), th); } +/** + * Implementation of dt_object_operations::do_capa_get. + * + * \see dt_object_operations::do_capa_get() in the API description for details. + */ static struct obd_capa *lod_capa_get(const struct lu_env *env, struct dt_object *dt, struct lustre_capa *old, __u64 opc) @@ -1111,24 +3704,184 @@ static struct obd_capa *lod_capa_get(const struct lu_env *env, return dt_capa_get(env, dt_object_child(dt), old, opc); } -static int lod_object_sync(const struct lu_env *env, struct dt_object *dt) +/** + * Implementation of dt_object_operations::do_object_sync. + * + * \see dt_object_operations::do_object_sync() in the API description + * for details. + */ +static int lod_object_sync(const struct lu_env *env, struct dt_object *dt, + __u64 start, __u64 end) +{ + return dt_object_sync(env, dt_object_child(dt), start, end); +} + +struct lod_slave_locks { + int lsl_lock_count; + struct lustre_handle lsl_handle[0]; +}; + +/** + * Release LDLM locks on the stripes of a striped directory. + * + * Iterates over all the locks taken on the stripe objects and + * release them using ->do_object_unlock() method. + * + * \param[in] env execution environment + * \param[in] dt striped object + * \param[in] einfo lock description + * \param[in] policy data describing requested lock + * + * \retval 0 on success + * \retval negative if failed + */ +static int lod_object_unlock_internal(const struct lu_env *env, + struct dt_object *dt, + struct ldlm_enqueue_info *einfo, + ldlm_policy_data_t *policy) +{ + struct lod_object *lo = lod_dt_obj(dt); + struct lod_slave_locks *slave_locks = einfo->ei_cbdata; + int rc = 0; + int i; + ENTRY; + + if (slave_locks == NULL) + RETURN(0); + + for (i = 1; i < slave_locks->lsl_lock_count; i++) { + if (lustre_handle_is_used(&slave_locks->lsl_handle[i])) { + int rc1; + + einfo->ei_cbdata = &slave_locks->lsl_handle[i]; + rc1 = dt_object_unlock(env, lo->ldo_stripe[i], einfo, + policy); + if (rc1 < 0) + rc = rc == 0 ? rc1 : rc; + } + } + + RETURN(rc); +} + +/** + * Implementation of dt_object_operations::do_object_unlock. + * + * Used to release LDLM lock(s). + * + * \see dt_object_operations::do_object_unlock() in the API description + * for details. + */ +static int lod_object_unlock(const struct lu_env *env, struct dt_object *dt, + struct ldlm_enqueue_info *einfo, + union ldlm_policy_data *policy) { - return dt_object_sync(env, dt_object_child(dt)); + struct lod_object *lo = lod_dt_obj(dt); + struct lod_slave_locks *slave_locks = einfo->ei_cbdata; + int slave_locks_size; + int rc; + ENTRY; + + if (slave_locks == NULL) + RETURN(0); + + if (!S_ISDIR(dt->do_lu.lo_header->loh_attr)) + RETURN(-ENOTDIR); + + rc = lod_load_striping(env, lo); + if (rc != 0) + RETURN(rc); + + /* Note: for remote lock for single stripe dir, MDT will cancel + * the lock by lockh directly */ + if (lo->ldo_stripenr <= 1 && dt_object_remote(dt_object_child(dt))) + RETURN(0); + + /* Only cancel slave lock for striped dir */ + rc = lod_object_unlock_internal(env, dt, einfo, policy); + + slave_locks_size = sizeof(*slave_locks) + slave_locks->lsl_lock_count * + sizeof(slave_locks->lsl_handle[0]); + OBD_FREE(slave_locks, slave_locks_size); + einfo->ei_cbdata = NULL; + + RETURN(rc); } +/** + * Implementation of dt_object_operations::do_object_lock. + * + * Used to get LDLM lock on the non-striped and striped objects. + * + * \see dt_object_operations::do_object_lock() in the API description + * for details. + */ static int lod_object_lock(const struct lu_env *env, - struct dt_object *dt, struct lustre_handle *lh, + struct dt_object *dt, + struct lustre_handle *lh, struct ldlm_enqueue_info *einfo, - void *policy) + union ldlm_policy_data *policy) { - struct dt_object *next = dt_object_child(dt); - int rc; + struct lod_object *lo = lod_dt_obj(dt); + int rc = 0; + int i; + int slave_locks_size; + struct lod_slave_locks *slave_locks = NULL; ENTRY; - /* - * declare setattr on the local object - */ - rc = dt_object_lock(env, next, lh, einfo, policy); + /* remote object lock */ + if (!einfo->ei_enq_slave) { + LASSERT(dt_object_remote(dt)); + return dt_object_lock(env, dt_object_child(dt), lh, einfo, + policy); + } + + if (!S_ISDIR(dt->do_lu.lo_header->loh_attr)) + RETURN(-ENOTDIR); + + rc = lod_load_striping(env, lo); + if (rc != 0) + RETURN(rc); + + /* No stripes */ + if (lo->ldo_stripenr <= 1) + RETURN(0); + + slave_locks_size = sizeof(*slave_locks) + lo->ldo_stripenr * + sizeof(slave_locks->lsl_handle[0]); + /* Freed in lod_object_unlock */ + OBD_ALLOC(slave_locks, slave_locks_size); + if (slave_locks == NULL) + RETURN(-ENOMEM); + slave_locks->lsl_lock_count = lo->ldo_stripenr; + + /* striped directory lock */ + for (i = 1; i < lo->ldo_stripenr; i++) { + struct lustre_handle lockh; + struct ldlm_res_id *res_id; + + res_id = &lod_env_info(env)->lti_res_id; + fid_build_reg_res_name(lu_object_fid(&lo->ldo_stripe[i]->do_lu), + res_id); + einfo->ei_res_id = res_id; + + LASSERT(lo->ldo_stripe[i]); + rc = dt_object_lock(env, lo->ldo_stripe[i], &lockh, einfo, + policy); + if (rc != 0) + GOTO(out, rc); + slave_locks->lsl_handle[i] = lockh; + } + + einfo->ei_cbdata = slave_locks; + +out: + if (rc != 0 && slave_locks != NULL) { + einfo->ei_cbdata = slave_locks; + lod_object_unlock_internal(env, dt, einfo, policy); + OBD_FREE(slave_locks, slave_locks_size); + einfo->ei_cbdata = NULL; + } RETURN(rc); } @@ -1161,8 +3914,14 @@ struct dt_object_operations lod_obj_ops = { .do_capa_get = lod_capa_get, .do_object_sync = lod_object_sync, .do_object_lock = lod_object_lock, + .do_object_unlock = lod_object_unlock, }; +/** + * Implementation of dt_body_operations::dbo_read. + * + * \see dt_body_operations::dbo_read() in the API description for details. + */ static ssize_t lod_read(const struct lu_env *env, struct dt_object *dt, struct lu_buf *buf, loff_t *pos, struct lustre_capa *capa) @@ -1171,15 +3930,26 @@ static ssize_t lod_read(const struct lu_env *env, struct dt_object *dt, return next->do_body_ops->dbo_read(env, next, buf, pos, capa); } +/** + * Implementation of dt_body_operations::dbo_declare_write. + * + * \see dt_body_operations::dbo_declare_write() in the API description + * for details. + */ static ssize_t lod_declare_write(const struct lu_env *env, struct dt_object *dt, - const loff_t size, loff_t pos, + const struct lu_buf *buf, loff_t pos, struct thandle *th) { return dt_declare_record_write(env, dt_object_child(dt), - size, pos, th); + buf, pos, th); } +/** + * Implementation of dt_body_operations::dbo_write. + * + * \see dt_body_operations::dbo_write() in the API description for details. + */ static ssize_t lod_write(const struct lu_env *env, struct dt_object *dt, const struct lu_buf *buf, loff_t *pos, struct thandle *th, struct lustre_capa *capa, int iq) @@ -1195,31 +3965,99 @@ static const struct dt_body_operations lod_body_lnk_ops = { .dbo_write = lod_write }; -static int lod_object_init(const struct lu_env *env, struct lu_object *o, +/** + * Implementation of lu_object_operations::loo_object_init. + * + * The function determines the type and the index of the target device using + * sequence of the object's FID. Then passes control down to the + * corresponding device: + * OSD for the local objects, OSP for remote + * + * \see lu_object_operations::loo_object_init() in the API description + * for details. + */ +static int lod_object_init(const struct lu_env *env, struct lu_object *lo, const struct lu_object_conf *conf) { - struct lod_device *d = lu2lod_dev(o->lo_dev); - struct lu_object *below; - struct lu_device *under; + struct lod_device *lod = lu2lod_dev(lo->lo_dev); + struct lu_device *cdev = NULL; + struct lu_object *cobj; + struct lod_tgt_descs *ltd = NULL; + struct lod_tgt_desc *tgt; + u32 idx = 0; + int type = LU_SEQ_RANGE_ANY; + int rc; ENTRY; - /* - * create local object - */ - under = &d->lod_child->dd_lu_dev; - below = under->ld_ops->ldo_object_alloc(env, o->lo_header, under); - if (below == NULL) + rc = lod_fld_lookup(env, lod, lu_object_fid(lo), &idx, &type); + if (rc != 0) { + /* Note: Sometimes, it will Return EAGAIN here, see + * ptrlpc_import_delay_req(), which might confuse + * lu_object_find_at() and make it wait there incorrectly. + * so we convert it to EIO here.*/ + if (rc == -EAGAIN) + rc = -EIO; + + RETURN(rc); + } + + if (type == LU_SEQ_RANGE_MDT && + idx == lu_site2seq(lo->lo_dev->ld_site)->ss_node_id) { + cdev = &lod->lod_child->dd_lu_dev; + } else if (type == LU_SEQ_RANGE_MDT) { + ltd = &lod->lod_mdt_descs; + lod_getref(ltd); + } else if (type == LU_SEQ_RANGE_OST) { + ltd = &lod->lod_ost_descs; + lod_getref(ltd); + } else { + LBUG(); + } + + if (ltd != NULL) { + if (ltd->ltd_tgts_size > idx && + cfs_bitmap_check(ltd->ltd_tgt_bitmap, idx)) { + tgt = LTD_TGT(ltd, idx); + + LASSERT(tgt != NULL); + LASSERT(tgt->ltd_tgt != NULL); + + cdev = &(tgt->ltd_tgt->dd_lu_dev); + } + lod_putref(lod, ltd); + } + + if (unlikely(cdev == NULL)) + RETURN(-ENOENT); + + cobj = cdev->ld_ops->ldo_object_alloc(env, lo->lo_header, cdev); + if (unlikely(cobj == NULL)) RETURN(-ENOMEM); - lu_object_add(o, below); + lu_object_add(lo, cobj); RETURN(0); } +/** + * + * Release resources associated with striping. + * + * If the object is striped (regular or directory), then release + * the stripe objects references and free the ldo_stripe array. + * + * \param[in] env execution environment + * \param[in] lo object + */ void lod_object_free_striping(const struct lu_env *env, struct lod_object *lo) { int i; + if (lo->ldo_dir_stripe != NULL) { + OBD_FREE_PTR(lo->ldo_dir_stripe); + lo->ldo_dir_stripe = NULL; + } + if (lo->ldo_stripe) { LASSERT(lo->ldo_stripes_allocated > 0); @@ -1237,9 +4075,11 @@ void lod_object_free_striping(const struct lu_env *env, struct lod_object *lo) lo->ldo_pattern = 0; } -/* - * ->start is called once all slices are initialized, including header's - * cache for mode (object type). using the type we can initialize ops +/** + * Implementation of lu_object_operations::loo_object_start. + * + * \see lu_object_operations::loo_object_start() in the API description + * for details. */ static int lod_object_start(const struct lu_env *env, struct lu_object *o) { @@ -1248,6 +4088,12 @@ static int lod_object_start(const struct lu_env *env, struct lu_object *o) return 0; } +/** + * Implementation of lu_object_operations::loo_object_free. + * + * \see lu_object_operations::loo_object_free() in the API description + * for details. + */ static void lod_object_free(const struct lu_env *env, struct lu_object *o) { struct lod_object *mo = lu2lod_obj(o); @@ -1264,12 +4110,24 @@ static void lod_object_free(const struct lu_env *env, struct lu_object *o) OBD_SLAB_FREE_PTR(mo, lod_object_kmem); } +/** + * Implementation of lu_object_operations::loo_object_release. + * + * \see lu_object_operations::loo_object_release() in the API description + * for details. + */ static void lod_object_release(const struct lu_env *env, struct lu_object *o) { /* XXX: shouldn't we release everything here in case if object * creation failed before? */ } +/** + * Implementation of lu_object_operations::loo_object_print. + * + * \see lu_object_operations::loo_object_print() in the API description + * for details. + */ static int lod_object_print(const struct lu_env *env, void *cookie, lu_printer_t p, const struct lu_object *l) { @@ -1285,51 +4143,3 @@ struct lu_object_operations lod_lu_obj_ops = { .loo_object_release = lod_object_release, .loo_object_print = lod_object_print, }; - -/** - * Init remote lod object - */ -static int lod_robject_init(const struct lu_env *env, struct lu_object *lo, - const struct lu_object_conf *conf) -{ - struct lod_device *lod = lu2lod_dev(lo->lo_dev); - struct lod_tgt_descs *ltd = &lod->lod_mdt_descs; - struct lu_device *c_dev = NULL; - struct lu_object *c_obj; - int i; - ENTRY; - - lod_getref(ltd); - if (ltd->ltd_tgts_size > 0) { - cfs_foreach_bit(ltd->ltd_tgt_bitmap, i) { - struct lod_tgt_desc *tgt; - tgt = LTD_TGT(ltd, i); - LASSERT(tgt && tgt->ltd_tgt); - if (tgt->ltd_index == - lu2lod_obj(lo)->ldo_mds_num) { - c_dev = &(tgt->ltd_tgt->dd_lu_dev); - break; - } - } - } - lod_putref(lod, ltd); - - if (unlikely(c_dev == NULL)) - RETURN(-ENOENT); - - c_obj = c_dev->ld_ops->ldo_object_alloc(env, lo->lo_header, c_dev); - if (unlikely(c_obj == NULL)) - RETURN(-ENOMEM); - - lu_object_add(lo, c_obj); - - RETURN(0); -} - -struct lu_object_operations lod_lu_robj_ops = { - .loo_object_init = lod_robject_init, - .loo_object_start = lod_object_start, - .loo_object_free = lod_object_free, - .loo_object_release = lod_object_release, - .loo_object_print = lod_object_print, -};