-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
/*
* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2014, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
*/
#define DEBUG_SUBSYSTEM S_CLASS
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
#include <obd.h>
#include <dt_object.h>
/* fid_be_to_cpu() */
#include <lustre_fid.h>
-struct dt_find_hint {
- struct lu_fid *dfh_fid;
- struct dt_device *dfh_dt;
- struct dt_object *dfh_o;
-};
-
-struct dt_thread_info {
- char dti_buf[DT_MAX_PATH];
- struct dt_find_hint dti_dfh;
-};
+#include <lustre_quota.h>
/* context key constructor/destructor: dt_global_key_init, dt_global_key_fini */
LU_KEY_INIT(dt_global, struct dt_thread_info);
LU_KEY_FINI(dt_global, struct dt_thread_info);
-static struct lu_context_key dt_key = {
- .lct_tags = LCT_MD_THREAD|LCT_DT_THREAD,
+struct lu_context_key dt_key = {
+ .lct_tags = LCT_MD_THREAD | LCT_DT_THREAD | LCT_MG_THREAD | LCT_LOCAL,
.lct_init = dt_global_key_init,
.lct_fini = dt_global_key_fini
};
*/
void dt_txn_callback_add(struct dt_device *dev, struct dt_txn_callback *cb)
{
- cfs_list_add(&cb->dtc_linkage, &dev->dd_txn_callbacks);
+ list_add(&cb->dtc_linkage, &dev->dd_txn_callbacks);
}
EXPORT_SYMBOL(dt_txn_callback_add);
void dt_txn_callback_del(struct dt_device *dev, struct dt_txn_callback *cb)
{
- cfs_list_del_init(&cb->dtc_linkage);
+ list_del_init(&cb->dtc_linkage);
}
EXPORT_SYMBOL(dt_txn_callback_del);
int dt_txn_hook_start(const struct lu_env *env,
- struct dt_device *dev, struct txn_param *param)
+ struct dt_device *dev, struct thandle *th)
{
- int result;
+ int rc = 0;
struct dt_txn_callback *cb;
- result = 0;
- cfs_list_for_each_entry(cb, &dev->dd_txn_callbacks, dtc_linkage) {
+ if (th->th_local)
+ return 0;
+
+ list_for_each_entry(cb, &dev->dd_txn_callbacks, dtc_linkage) {
if (cb->dtc_txn_start == NULL ||
!(cb->dtc_tag & env->le_ctx.lc_tags))
continue;
- result = cb->dtc_txn_start(env, param, cb->dtc_cookie);
- if (result < 0)
+ rc = cb->dtc_txn_start(env, th, cb->dtc_cookie);
+ if (rc < 0)
break;
}
- return result;
+ return rc;
}
EXPORT_SYMBOL(dt_txn_hook_start);
{
struct dt_device *dev = txn->th_dev;
struct dt_txn_callback *cb;
- int result;
+ int rc = 0;
+
+ if (txn->th_local)
+ return 0;
- result = 0;
- cfs_list_for_each_entry(cb, &dev->dd_txn_callbacks, dtc_linkage) {
+ list_for_each_entry(cb, &dev->dd_txn_callbacks, dtc_linkage) {
if (cb->dtc_txn_stop == NULL ||
!(cb->dtc_tag & env->le_ctx.lc_tags))
continue;
- result = cb->dtc_txn_stop(env, txn, cb->dtc_cookie);
- if (result < 0)
+ rc = cb->dtc_txn_stop(env, txn, cb->dtc_cookie);
+ if (rc < 0)
break;
}
- return result;
+ return rc;
}
EXPORT_SYMBOL(dt_txn_hook_stop);
-int dt_txn_hook_commit(const struct lu_env *env, struct thandle *txn)
+void dt_txn_hook_commit(struct thandle *txn)
{
- struct dt_device *dev = txn->th_dev;
- struct dt_txn_callback *cb;
- int result;
+ struct dt_txn_callback *cb;
- result = 0;
- cfs_list_for_each_entry(cb, &dev->dd_txn_callbacks, dtc_linkage) {
- if (cb->dtc_txn_commit == NULL ||
- !(cb->dtc_tag & env->le_ctx.lc_tags))
- continue;
- result = cb->dtc_txn_commit(env, txn, cb->dtc_cookie);
- if (result < 0)
- break;
- }
- return result;
+ if (txn->th_local)
+ return;
+
+ list_for_each_entry(cb, &txn->th_dev->dd_txn_callbacks,
+ dtc_linkage) {
+ if (cb->dtc_txn_commit)
+ cb->dtc_txn_commit(txn, cb->dtc_cookie);
+ }
}
EXPORT_SYMBOL(dt_txn_hook_commit);
int dt_device_init(struct dt_device *dev, struct lu_device_type *t)
{
-
- CFS_INIT_LIST_HEAD(&dev->dd_txn_callbacks);
- return lu_device_init(&dev->dd_lu_dev, t);
+ INIT_LIST_HEAD(&dev->dd_txn_callbacks);
+ return lu_device_init(&dev->dd_lu_dev, t);
}
EXPORT_SYMBOL(dt_device_init);
}
return result;
}
-
EXPORT_SYMBOL(dt_mode_to_dft);
+
/**
* lookup fid for object named \a name in directory \a dir.
*/
-static int dt_lookup(const struct lu_env *env, struct dt_object *dir,
- const char *name, struct lu_fid *fid)
+int dt_lookup_dir(const struct lu_env *env, struct dt_object *dir,
+ const char *name, struct lu_fid *fid)
{
- struct dt_rec *rec = (struct dt_rec *)fid;
- const struct dt_key *key = (const struct dt_key *)name;
- int result;
-
- if (dt_try_as_dir(env, dir)) {
- result = dir->do_index_ops->dio_lookup(env, dir, rec, key,
- BYPASS_CAPA);
- if (result > 0)
- result = 0;
- else if (result == 0)
- result = -ENOENT;
- } else
- result = -ENOTDIR;
- return result;
+ if (dt_try_as_dir(env, dir))
+ return dt_lookup(env, dir, (struct dt_rec *)fid,
+ (const struct dt_key *)name);
+ return -ENOTDIR;
}
+EXPORT_SYMBOL(dt_lookup_dir);
-/**
- * get object for given \a fid.
- */
-struct dt_object *dt_locate(const struct lu_env *env,
- struct dt_device *dev,
- const struct lu_fid *fid)
+/* this differs from dt_locate by top_dev as parameter
+ * but not one from lu_site */
+struct dt_object *dt_locate_at(const struct lu_env *env,
+ struct dt_device *dev,
+ const struct lu_fid *fid,
+ struct lu_device *top_dev,
+ const struct lu_object_conf *conf)
{
- struct lu_object *obj;
- struct dt_object *dt;
+ struct lu_object *lo;
+ struct lu_object *n;
- obj = lu_object_find(env, &dev->dd_lu_dev, fid, NULL);
- if (!IS_ERR(obj)) {
- obj = lu_object_locate(obj->lo_header, dev->dd_lu_dev.ld_type);
- LASSERT(obj != NULL);
- dt = container_of(obj, struct dt_object, do_lu);
- } else
- dt = (struct dt_object *)obj;
- return dt;
+ lo = lu_object_find_at(env, top_dev, fid, conf);
+ if (IS_ERR(lo))
+ return ERR_PTR(PTR_ERR(lo));
+
+ LASSERT(lo != NULL);
+
+ list_for_each_entry(n, &lo->lo_header->loh_layers, lo_linkage) {
+ if (n->lo_dev == &dev->dd_lu_dev)
+ return container_of0(n, struct dt_object, do_lu);
+ }
+
+ return ERR_PTR(-ENOENT);
}
-EXPORT_SYMBOL(dt_locate);
+EXPORT_SYMBOL(dt_locate_at);
/**
- * find a object named \a entry in given \a dfh->dfh_o directory.
+ * find an object named \a entry in given \a dfh->dfh_o directory.
*/
static int dt_find_entry(const struct lu_env *env, const char *entry, void *data)
{
struct dt_object *obj = dfh->dfh_o;
int result;
- result = dt_lookup(env, obj, entry, fid);
+ result = dt_lookup_dir(env, obj, entry, fid);
lu_object_put(env, &obj->do_lu);
if (result == 0) {
obj = dt_locate(env, dt, fid);
return rc;
}
-static struct dt_object *dt_store_resolve(const struct lu_env *env,
- struct dt_device *dt,
- const char *path,
- struct lu_fid *fid)
+struct dt_object *
+dt_store_resolve(const struct lu_env *env, struct dt_device *dt,
+ const char *path, struct lu_fid *fid)
{
- struct dt_thread_info *info = lu_context_key_get(&env->le_ctx,
- &dt_key);
- struct dt_find_hint *dfh = &info->dti_dfh;
- struct dt_object *obj;
- char *local = info->dti_buf;
- int result;
+ struct dt_thread_info *info = dt_info(env);
+ struct dt_find_hint *dfh = &info->dti_dfh;
+ struct dt_object *obj;
+ int result;
+
dfh->dfh_dt = dt;
dfh->dfh_fid = fid;
- strncpy(local, path, DT_MAX_PATH);
- local[DT_MAX_PATH - 1] = '\0';
+ strlcpy(info->dti_buf, path, sizeof(info->dti_buf));
result = dt->dd_ops->dt_root_get(env, dt, fid);
if (result == 0) {
obj = dt_locate(env, dt, fid);
if (!IS_ERR(obj)) {
dfh->dfh_o = obj;
- result = dt_path_parser(env, local, dt_find_entry, dfh);
+ result = dt_path_parser(env, info->dti_buf,
+ dt_find_entry, dfh);
if (result != 0)
obj = ERR_PTR(result);
else
struct dt_object *o;
int result;
- result = dt_lookup(env, p, name, fid);
+ result = dt_lookup_dir(env, p, name, fid);
if (result == 0){
o = dt_locate(env, dt, fid);
}
}
return file;
}
-EXPORT_SYMBOL(dt_store_open);
+
+struct dt_object *dt_find_or_create(const struct lu_env *env,
+ struct dt_device *dt,
+ const struct lu_fid *fid,
+ struct dt_object_format *dof,
+ struct lu_attr *at)
+{
+ struct dt_object *dto;
+ struct thandle *th;
+ int rc;
+
+ ENTRY;
+
+ dto = dt_locate(env, dt, fid);
+ if (IS_ERR(dto))
+ RETURN(dto);
+
+ LASSERT(dto != NULL);
+ if (dt_object_exists(dto))
+ RETURN(dto);
+
+ th = dt_trans_create(env, dt);
+ if (IS_ERR(th))
+ GOTO(out, rc = PTR_ERR(th));
+
+ rc = dt_declare_create(env, dto, at, NULL, dof, th);
+ if (rc)
+ GOTO(trans_stop, rc);
+
+ rc = dt_trans_start_local(env, dt, th);
+ if (rc)
+ GOTO(trans_stop, rc);
+
+ dt_write_lock(env, dto, 0);
+ if (dt_object_exists(dto))
+ GOTO(unlock, rc = 0);
+
+ CDEBUG(D_OTHER, "create new object "DFID"\n", PFID(fid));
+
+ rc = dt_create(env, dto, at, NULL, dof, th);
+ if (rc)
+ GOTO(unlock, rc);
+ LASSERT(dt_object_exists(dto));
+unlock:
+ dt_write_unlock(env, dto);
+trans_stop:
+ dt_trans_stop(env, dt, th);
+out:
+ if (rc) {
+ lu_object_put(env, &dto->do_lu);
+ RETURN(ERR_PTR(rc));
+ }
+ RETURN(dto);
+}
+EXPORT_SYMBOL(dt_find_or_create);
/* dt class init function. */
int dt_global_init(void)
lu_context_key_degister(&dt_key);
}
+/**
+ * Generic read helper. May return an error for partial reads.
+ *
+ * \param env lustre environment
+ * \param dt object to be read
+ * \param buf lu_buf to be filled, with buffer pointer and length
+ * \param pos position to start reading, updated as data is read
+ *
+ * \retval real size of data read
+ * \retval -ve errno on failure
+ */
+int dt_read(const struct lu_env *env, struct dt_object *dt,
+ struct lu_buf *buf, loff_t *pos)
+{
+ LASSERTF(dt != NULL, "dt is NULL when we want to read record\n");
+ return dt->do_body_ops->dbo_read(env, dt, buf, pos);
+}
+EXPORT_SYMBOL(dt_read);
+
+/**
+ * Read structures of fixed size from storage. Unlike dt_read(), using
+ * dt_record_read() will return an error for partial reads.
+ *
+ * \param env lustre environment
+ * \param dt object to be read
+ * \param buf lu_buf to be filled, with buffer pointer and length
+ * \param pos position to start reading, updated as data is read
+ *
+ * \retval 0 on successfully reading full buffer
+ * \retval -EFAULT on short read
+ * \retval -ve errno on failure
+ */
int dt_record_read(const struct lu_env *env, struct dt_object *dt,
struct lu_buf *buf, loff_t *pos)
{
- int rc;
-
- LASSERTF(dt != NULL, "dt is NULL when we want to read record\n");
+ ssize_t size;
- rc = dt->do_body_ops->dbo_read(env, dt, buf, pos, BYPASS_CAPA);
+ LASSERTF(dt != NULL, "dt is NULL when we want to read record\n");
- if (rc == buf->lb_len)
- rc = 0;
- else if (rc >= 0)
- rc = -EFAULT;
- return rc;
+ size = dt->do_body_ops->dbo_read(env, dt, buf, pos);
+ if (size < 0)
+ return size;
+ return (size == (ssize_t)buf->lb_len) ? 0 : -EFAULT;
}
EXPORT_SYMBOL(dt_record_read);
int dt_record_write(const struct lu_env *env, struct dt_object *dt,
const struct lu_buf *buf, loff_t *pos, struct thandle *th)
{
- int rc;
+ ssize_t size;
- LASSERTF(dt != NULL, "dt is NULL when we want to write record\n");
- LASSERT(th != NULL);
- rc = dt->do_body_ops->dbo_write(env, dt, buf, pos, th, BYPASS_CAPA, 1);
- if (rc == buf->lb_len)
- rc = 0;
- else if (rc >= 0)
- rc = -EFAULT;
- return rc;
+ LASSERTF(dt != NULL, "dt is NULL when we want to write record\n");
+ LASSERT(th != NULL);
+ LASSERT(dt->do_body_ops);
+ LASSERT(dt->do_body_ops->dbo_write);
+
+ size = dt->do_body_ops->dbo_write(env, dt, buf, pos, th, 1);
+ if (size < 0)
+ return size;
+ return (size == (ssize_t)buf->lb_len) ? 0 : -EFAULT;
}
EXPORT_SYMBOL(dt_record_write);
+int dt_declare_version_set(const struct lu_env *env, struct dt_object *o,
+ struct thandle *th)
+{
+ struct lu_buf vbuf;
+ char *xname = XATTR_NAME_VERSION;
+
+ LASSERT(o);
+ vbuf.lb_buf = NULL;
+ vbuf.lb_len = sizeof(dt_obj_version_t);
+ return dt_declare_xattr_set(env, o, &vbuf, xname, 0, th);
+
+}
+EXPORT_SYMBOL(dt_declare_version_set);
+
+void dt_version_set(const struct lu_env *env, struct dt_object *o,
+ dt_obj_version_t version, struct thandle *th)
+{
+ struct lu_buf vbuf;
+ char *xname = XATTR_NAME_VERSION;
+ int rc;
+
+ LASSERT(o);
+ vbuf.lb_buf = &version;
+ vbuf.lb_len = sizeof(version);
+
+ rc = dt_xattr_set(env, o, &vbuf, xname, 0, th);
+ if (rc < 0)
+ CDEBUG(D_INODE, "Can't set version, rc %d\n", rc);
+ return;
+}
+EXPORT_SYMBOL(dt_version_set);
+
+dt_obj_version_t dt_version_get(const struct lu_env *env, struct dt_object *o)
+{
+ struct lu_buf vbuf;
+ char *xname = XATTR_NAME_VERSION;
+ dt_obj_version_t version;
+ int rc;
+
+ LASSERT(o);
+ vbuf.lb_buf = &version;
+ vbuf.lb_len = sizeof(version);
+ rc = dt_xattr_get(env, o, &vbuf, xname);
+ if (rc != sizeof(version)) {
+ CDEBUG(D_INODE, "Can't get version, rc %d\n", rc);
+ version = 0;
+ }
+ return version;
+}
+EXPORT_SYMBOL(dt_version_get);
+
+/* list of all supported index types */
+
+/* directories */
const struct dt_index_features dt_directory_features;
EXPORT_SYMBOL(dt_directory_features);
+
+/* scrub iterator */
+const struct dt_index_features dt_otable_features;
+EXPORT_SYMBOL(dt_otable_features);
+
+/* lfsck orphan */
+const struct dt_index_features dt_lfsck_orphan_features = {
+ .dif_flags = 0,
+ .dif_keysize_min = sizeof(struct lu_fid),
+ .dif_keysize_max = sizeof(struct lu_fid),
+ .dif_recsize_min = sizeof(struct lu_orphan_rec),
+ .dif_recsize_max = sizeof(struct lu_orphan_rec),
+ .dif_ptrsize = 4
+};
+EXPORT_SYMBOL(dt_lfsck_orphan_features);
+
+/* lfsck */
+const struct dt_index_features dt_lfsck_features = {
+ .dif_flags = DT_IND_UPDATE,
+ .dif_keysize_min = sizeof(struct lu_fid),
+ .dif_keysize_max = sizeof(struct lu_fid),
+ .dif_recsize_min = sizeof(__u8),
+ .dif_recsize_max = sizeof(__u8),
+ .dif_ptrsize = 4
+};
+EXPORT_SYMBOL(dt_lfsck_features);
+
+/* accounting indexes */
+const struct dt_index_features dt_acct_features = {
+ .dif_flags = DT_IND_UPDATE,
+ .dif_keysize_min = sizeof(__u64), /* 64-bit uid/gid */
+ .dif_keysize_max = sizeof(__u64), /* 64-bit uid/gid */
+ .dif_recsize_min = sizeof(struct lquota_acct_rec), /* 16 bytes */
+ .dif_recsize_max = sizeof(struct lquota_acct_rec), /* 16 bytes */
+ .dif_ptrsize = 4
+};
+EXPORT_SYMBOL(dt_acct_features);
+
+/* global quota files */
+const struct dt_index_features dt_quota_glb_features = {
+ .dif_flags = DT_IND_UPDATE,
+ /* a different key would have to be used for per-directory quota */
+ .dif_keysize_min = sizeof(__u64), /* 64-bit uid/gid */
+ .dif_keysize_max = sizeof(__u64), /* 64-bit uid/gid */
+ .dif_recsize_min = sizeof(struct lquota_glb_rec), /* 32 bytes */
+ .dif_recsize_max = sizeof(struct lquota_glb_rec), /* 32 bytes */
+ .dif_ptrsize = 4
+};
+EXPORT_SYMBOL(dt_quota_glb_features);
+
+/* slave quota files */
+const struct dt_index_features dt_quota_slv_features = {
+ .dif_flags = DT_IND_UPDATE,
+ /* a different key would have to be used for per-directory quota */
+ .dif_keysize_min = sizeof(__u64), /* 64-bit uid/gid */
+ .dif_keysize_max = sizeof(__u64), /* 64-bit uid/gid */
+ .dif_recsize_min = sizeof(struct lquota_slv_rec), /* 8 bytes */
+ .dif_recsize_max = sizeof(struct lquota_slv_rec), /* 8 bytes */
+ .dif_ptrsize = 4
+};
+EXPORT_SYMBOL(dt_quota_slv_features);
+
+/* helper function returning what dt_index_features structure should be used
+ * based on the FID sequence. This is used by OBD_IDX_READ RPC */
+static inline const struct dt_index_features *dt_index_feat_select(__u64 seq,
+ __u32 mode)
+{
+ if (seq == FID_SEQ_QUOTA_GLB) {
+ /* global quota index */
+ if (!S_ISREG(mode))
+ /* global quota index should be a regular file */
+ return ERR_PTR(-ENOENT);
+ return &dt_quota_glb_features;
+ } else if (seq == FID_SEQ_QUOTA) {
+ /* quota slave index */
+ if (!S_ISREG(mode))
+ /* slave index should be a regular file */
+ return ERR_PTR(-ENOENT);
+ return &dt_quota_slv_features;
+ } else if (seq == FID_SEQ_LAYOUT_RBTREE){
+ return &dt_lfsck_orphan_features;
+ } else if (seq >= FID_SEQ_NORMAL) {
+ /* object is part of the namespace, verify that it is a
+ * directory */
+ if (!S_ISDIR(mode))
+ /* sorry, we can only deal with directory */
+ return ERR_PTR(-ENOTDIR);
+ return &dt_directory_features;
+ }
+
+ return ERR_PTR(-EOPNOTSUPP);
+}
+
+/*
+ * Fill a lu_idxpage with key/record pairs read for transfer via OBD_IDX_READ
+ * RPC
+ *
+ * \param env - is the environment passed by the caller
+ * \param lp - is a pointer to the lu_page to fill
+ * \param nob - is the maximum number of bytes that should be copied
+ * \param iops - is the index operation vector associated with the index object
+ * \param it - is a pointer to the current iterator
+ * \param attr - is the index attribute to pass to iops->rec()
+ * \param arg - is a pointer to the idx_info structure
+ */
+static int dt_index_page_build(const struct lu_env *env, union lu_page *lp,
+ size_t nob, const struct dt_it_ops *iops,
+ struct dt_it *it, __u32 attr, void *arg)
+{
+ struct idx_info *ii = (struct idx_info *)arg;
+ struct lu_idxpage *lip = &lp->lp_idx;
+ char *entry;
+ size_t size;
+ int rc;
+ ENTRY;
+
+ if (nob < LIP_HDR_SIZE)
+ return -EINVAL;
+
+ /* initialize the header of the new container */
+ memset(lip, 0, LIP_HDR_SIZE);
+ lip->lip_magic = LIP_MAGIC;
+ nob -= LIP_HDR_SIZE;
+
+ /* compute size needed to store a key/record pair */
+ size = ii->ii_recsize + ii->ii_keysize;
+ if ((ii->ii_flags & II_FL_NOHASH) == 0)
+ /* add hash if the client wants it */
+ size += sizeof(__u64);
+
+ entry = lip->lip_entries;
+ do {
+ char *tmp_entry = entry;
+ struct dt_key *key;
+ __u64 hash;
+ __u16 keysize;
+ __u16 recsize;
+
+ /* fetch 64-bit hash value */
+ hash = iops->store(env, it);
+ ii->ii_hash_end = hash;
+
+ if (OBD_FAIL_CHECK(OBD_FAIL_OBD_IDX_READ_BREAK)) {
+ if (lip->lip_nr != 0)
+ GOTO(out, rc = 0);
+ }
+
+ if (nob < size) {
+ if (lip->lip_nr == 0)
+ GOTO(out, rc = -EINVAL);
+ GOTO(out, rc = 0);
+ }
+
+ if (!(ii->ii_flags & II_FL_NOHASH)) {
+ /* client wants to the 64-bit hash value associated with
+ * each record */
+ memcpy(tmp_entry, &hash, sizeof(hash));
+ tmp_entry += sizeof(hash);
+ }
+
+ if (ii->ii_flags & II_FL_VARKEY)
+ keysize = iops->key_size(env, it);
+ else
+ keysize = ii->ii_keysize;
+
+ if (!(ii->ii_flags & II_FL_NOKEY)) {
+ /* then the key value */
+ key = iops->key(env, it);
+ memcpy(tmp_entry, key, keysize);
+ tmp_entry += keysize;
+ }
+
+ /* and finally the record */
+ rc = iops->rec(env, it, (struct dt_rec *)tmp_entry, attr);
+ if (rc != -ESTALE) {
+ if (rc != 0)
+ GOTO(out, rc);
+
+ /* hash/key/record successfully copied! */
+ lip->lip_nr++;
+ if (unlikely(lip->lip_nr == 1 && ii->ii_count == 0))
+ ii->ii_hash_start = hash;
+
+ if (ii->ii_flags & II_FL_VARREC)
+ recsize = iops->rec_size(env, it, attr);
+ else
+ recsize = ii->ii_recsize;
+
+ entry = tmp_entry + recsize;
+ nob -= size;
+ }
+
+ /* move on to the next record */
+ do {
+ rc = iops->next(env, it);
+ } while (rc == -ESTALE);
+
+ } while (rc == 0);
+
+ GOTO(out, rc);
+out:
+ if (rc >= 0 && lip->lip_nr > 0)
+ /* one more container */
+ ii->ii_count++;
+ if (rc > 0)
+ /* no more entries */
+ ii->ii_hash_end = II_END_OFF;
+ return rc;
+}
+
+
+/*
+ * Walk index and fill lu_page containers with key/record pairs
+ *
+ * \param env - is the environment passed by the caller
+ * \param obj - is the index object to parse
+ * \param rdpg - is the lu_rdpg descriptor associated with the transfer
+ * \param filler - is the callback function responsible for filling a lu_page
+ * with key/record pairs in the format wanted by the caller
+ * \param arg - is an opaq argument passed to the filler function
+ *
+ * \retval sum (in bytes) of all filled lu_pages
+ * \retval -ve errno on failure
+ */
+int dt_index_walk(const struct lu_env *env, struct dt_object *obj,
+ const struct lu_rdpg *rdpg, dt_index_page_build_t filler,
+ void *arg)
+{
+ struct dt_it *it;
+ const struct dt_it_ops *iops;
+ size_t pageidx, nob, nlupgs = 0;
+ int rc;
+ ENTRY;
+
+ LASSERT(rdpg->rp_pages != NULL);
+ LASSERT(obj->do_index_ops != NULL);
+
+ nob = rdpg->rp_count;
+ if (nob == 0)
+ RETURN(-EFAULT);
+
+ /* Iterate through index and fill containers from @rdpg */
+ iops = &obj->do_index_ops->dio_it;
+ LASSERT(iops != NULL);
+ it = iops->init(env, obj, rdpg->rp_attrs);
+ if (IS_ERR(it))
+ RETURN(PTR_ERR(it));
+
+ rc = iops->load(env, it, rdpg->rp_hash);
+ if (rc == 0) {
+ /*
+ * Iterator didn't find record with exactly the key requested.
+ *
+ * It is currently either
+ *
+ * - positioned above record with key less than
+ * requested---skip it.
+ * - or not positioned at all (is in IAM_IT_SKEWED
+ * state)---position it on the next item.
+ */
+ rc = iops->next(env, it);
+ } else if (rc > 0) {
+ rc = 0;
+ } else {
+ if (rc == -ENODATA)
+ rc = 0;
+ GOTO(out, rc);
+ }
+
+ /* Fill containers one after the other. There might be multiple
+ * containers per physical page.
+ *
+ * At this point and across for-loop:
+ * rc == 0 -> ok, proceed.
+ * rc > 0 -> end of index.
+ * rc < 0 -> error. */
+ for (pageidx = 0; rc == 0 && nob > 0; pageidx++) {
+ union lu_page *lp;
+ int i;
+
+ LASSERT(pageidx < rdpg->rp_npages);
+ lp = kmap(rdpg->rp_pages[pageidx]);
+
+ /* fill lu pages */
+ for (i = 0; i < LU_PAGE_COUNT; i++, lp++, nob -= LU_PAGE_SIZE) {
+ rc = filler(env, lp, min_t(size_t, nob, LU_PAGE_SIZE),
+ iops, it, rdpg->rp_attrs, arg);
+ if (rc < 0)
+ break;
+ /* one more lu_page */
+ nlupgs++;
+ if (rc > 0)
+ /* end of index */
+ break;
+ }
+ kunmap(rdpg->rp_pages[i]);
+ }
+
+out:
+ iops->put(env, it);
+ iops->fini(env, it);
+
+ if (rc >= 0)
+ rc = min_t(size_t, nlupgs * LU_PAGE_SIZE, rdpg->rp_count);
+
+ RETURN(rc);
+}
+EXPORT_SYMBOL(dt_index_walk);
+
+/**
+ * Walk key/record pairs of an index and copy them into 4KB containers to be
+ * transferred over the network. This is the common handler for OBD_IDX_READ
+ * RPC processing.
+ *
+ * \param env - is the environment passed by the caller
+ * \param dev - is the dt_device storing the index
+ * \param ii - is the idx_info structure packed by the client in the
+ * OBD_IDX_READ request
+ * \param rdpg - is the lu_rdpg descriptor
+ *
+ * \retval on success, return sum (in bytes) of all filled containers
+ * \retval appropriate error otherwise.
+ */
+int dt_index_read(const struct lu_env *env, struct dt_device *dev,
+ struct idx_info *ii, const struct lu_rdpg *rdpg)
+{
+ const struct dt_index_features *feat;
+ struct dt_object *obj;
+ int rc;
+ ENTRY;
+
+ /* rp_count shouldn't be null and should be a multiple of the container
+ * size */
+ if (rdpg->rp_count == 0 || (rdpg->rp_count & (LU_PAGE_SIZE - 1)) != 0)
+ RETURN(-EFAULT);
+
+ if (!fid_is_quota(&ii->ii_fid) && !fid_is_layout_rbtree(&ii->ii_fid) &&
+ !fid_is_norm(&ii->ii_fid))
+ RETURN(-EOPNOTSUPP);
+
+ /* lookup index object subject to the transfer */
+ obj = dt_locate(env, dev, &ii->ii_fid);
+ if (IS_ERR(obj))
+ RETURN(PTR_ERR(obj));
+ if (dt_object_exists(obj) == 0)
+ GOTO(out, rc = -ENOENT);
+
+ /* fetch index features associated with index object */
+ feat = dt_index_feat_select(fid_seq(&ii->ii_fid),
+ lu_object_attr(&obj->do_lu));
+ if (IS_ERR(feat))
+ GOTO(out, rc = PTR_ERR(feat));
+
+ /* load index feature if not done already */
+ if (obj->do_index_ops == NULL) {
+ rc = obj->do_ops->do_index_try(env, obj, feat);
+ if (rc)
+ GOTO(out, rc);
+ }
+
+ /* fill ii_flags with supported index features */
+ ii->ii_flags &= (II_FL_NOHASH | II_FL_NOKEY | II_FL_VARKEY |
+ II_FL_VARREC);
+
+ if (!(feat->dif_flags & DT_IND_VARKEY))
+ ii->ii_keysize = feat->dif_keysize_max;
+
+ if (!(feat->dif_flags & DT_IND_VARREC))
+ ii->ii_recsize = feat->dif_recsize_max;
+
+ if (feat->dif_flags & DT_IND_NONUNQ)
+ /* key isn't necessarily unique */
+ ii->ii_flags |= II_FL_NONUNQ;
+
+ if (!fid_is_layout_rbtree(&ii->ii_fid)) {
+ dt_read_lock(env, obj, 0);
+ /* fetch object version before walking the index */
+ ii->ii_version = dt_version_get(env, obj);
+ }
+
+ /* walk the index and fill lu_idxpages with key/record pairs */
+ rc = dt_index_walk(env, obj, rdpg, dt_index_page_build, ii);
+ if (!fid_is_layout_rbtree(&ii->ii_fid))
+ dt_read_unlock(env, obj);
+
+ if (rc == 0) {
+ /* index is empty */
+ LASSERT(ii->ii_count == 0);
+ ii->ii_hash_end = II_END_OFF;
+ }
+
+ GOTO(out, rc);
+out:
+ lu_object_put(env, &obj->do_lu);
+ return rc;
+}
+EXPORT_SYMBOL(dt_index_read);
+
+#ifdef CONFIG_PROC_FS
+int lprocfs_dt_blksize_seq_show(struct seq_file *m, void *v)
+{
+ struct dt_device *dt = m->private;
+ struct obd_statfs osfs;
+
+ int rc = dt_statfs(NULL, dt, &osfs);
+ if (rc == 0)
+ seq_printf(m, "%u\n", (unsigned) osfs.os_bsize);
+ return rc;
+}
+EXPORT_SYMBOL(lprocfs_dt_blksize_seq_show);
+
+int lprocfs_dt_kbytestotal_seq_show(struct seq_file *m, void *v)
+{
+ struct dt_device *dt = m->private;
+ struct obd_statfs osfs;
+
+ int rc = dt_statfs(NULL, dt, &osfs);
+ if (rc == 0) {
+ __u32 blk_size = osfs.os_bsize >> 10;
+ __u64 result = osfs.os_blocks;
+
+ while (blk_size >>= 1)
+ result <<= 1;
+
+ seq_printf(m, LPU64"\n", result);
+ }
+ return rc;
+}
+EXPORT_SYMBOL(lprocfs_dt_kbytestotal_seq_show);
+
+int lprocfs_dt_kbytesfree_seq_show(struct seq_file *m, void *v)
+{
+ struct dt_device *dt = m->private;
+ struct obd_statfs osfs;
+
+ int rc = dt_statfs(NULL, dt, &osfs);
+ if (rc == 0) {
+ __u32 blk_size = osfs.os_bsize >> 10;
+ __u64 result = osfs.os_bfree;
+
+ while (blk_size >>= 1)
+ result <<= 1;
+
+ seq_printf(m, LPU64"\n", result);
+ }
+ return rc;
+}
+EXPORT_SYMBOL(lprocfs_dt_kbytesfree_seq_show);
+
+int lprocfs_dt_kbytesavail_seq_show(struct seq_file *m, void *v)
+{
+ struct dt_device *dt = m->private;
+ struct obd_statfs osfs;
+
+ int rc = dt_statfs(NULL, dt, &osfs);
+ if (rc == 0) {
+ __u32 blk_size = osfs.os_bsize >> 10;
+ __u64 result = osfs.os_bavail;
+
+ while (blk_size >>= 1)
+ result <<= 1;
+
+ seq_printf(m, LPU64"\n", result);
+ }
+ return rc;
+}
+EXPORT_SYMBOL(lprocfs_dt_kbytesavail_seq_show);
+
+int lprocfs_dt_filestotal_seq_show(struct seq_file *m, void *v)
+{
+ struct dt_device *dt = m->private;
+ struct obd_statfs osfs;
+
+ int rc = dt_statfs(NULL, dt, &osfs);
+ if (rc == 0)
+ seq_printf(m, LPU64"\n", osfs.os_files);
+ return rc;
+}
+EXPORT_SYMBOL(lprocfs_dt_filestotal_seq_show);
+
+int lprocfs_dt_filesfree_seq_show(struct seq_file *m, void *v)
+{
+ struct dt_device *dt = m->private;
+ struct obd_statfs osfs;
+
+ int rc = dt_statfs(NULL, dt, &osfs);
+ if (rc == 0)
+ seq_printf(m, LPU64"\n", osfs.os_ffree);
+ return rc;
+}
+EXPORT_SYMBOL(lprocfs_dt_filesfree_seq_show);
+
+#endif /* CONFIG_PROC_FS */
git://git.whamcloud.com / fs / lustre-release.git / blobdiff