+++ /dev/null
-/* -*- 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.
- *
- * 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 LICENSE file that accompanied this code).
- *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
- * Use is subject to license terms.
- */
-/*
- * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
- *
- * lustre/osd/osd_internal.h
- *
- * Shared definitions and declarations for osd module
- *
- * Author: Nikita Danilov <nikita@clusterfs.com>
- */
-
-#ifndef _OSD_INTERNAL_H
-#define _OSD_INTERNAL_H
-
-#if defined(__KERNEL__)
-
-/* struct rw_semaphore */
-#include <linux/rwsem.h>
-/* struct dentry */
-#include <linux/dcache.h>
-/* struct dirent64 */
-#include <linux/dirent.h>
-
-#ifdef HAVE_EXT4_LDISKFS
-#include <ldiskfs/ldiskfs.h>
-#include <ldiskfs/ldiskfs_jbd2.h>
-#define osd_journal_callback_set(handle, func, jcb) jbd2_journal_callback_set(handle, func, jcb)
-#else
-#include <linux/jbd.h>
-#include <linux/ldiskfs_fs.h>
-#include <linux/ldiskfs_jbd.h>
-#define osd_journal_callback_set(handle, func, jcb) journal_callback_set(handle, func, jcb)
-#endif
-
-
-/* LUSTRE_OSD_NAME */
-#include <obd.h>
-/* class_register_type(), class_unregister_type(), class_get_type() */
-#include <obd_class.h>
-#include <lustre_disk.h>
-
-#include <dt_object.h>
-#include "osd_oi.h"
-#include "osd_iam.h"
-
-struct inode;
-
-#define OSD_OII_NOGEN (0)
-#define OSD_COUNTERS (0)
-
-#ifdef HAVE_QUOTA_SUPPORT
-struct osd_ctxt {
- __u32 oc_uid;
- __u32 oc_gid;
- __u32 oc_cap;
-};
-#endif
-
-/*
- * osd device.
- */
-struct osd_device {
- /* super-class */
- struct dt_device od_dt_dev;
- /* information about underlying file system */
- struct lustre_mount_info *od_mount;
- /* object index */
- struct osd_oi od_oi;
- /*
- * XXX temporary stuff for object index: directory where every object
- * is named by its fid.
- */
- struct dt_object *od_obj_area;
-
- /* Environment for transaction commit callback.
- * Currently, OSD is based on ext3/JBD. Transaction commit in ext3/JBD
- * is serialized, that is there is no more than one transaction commit
- * at a time (JBD journal_commit_transaction() is serialized).
- * This means that it's enough to have _one_ lu_context.
- */
- struct lu_env od_env_for_commit;
-
- /*
- * Fid Capability
- */
- unsigned int od_fl_capa:1;
- unsigned long od_capa_timeout;
- __u32 od_capa_alg;
- struct lustre_capa_key *od_capa_keys;
- cfs_hlist_head_t *od_capa_hash;
-
- cfs_proc_dir_entry_t *od_proc_entry;
- struct lprocfs_stats *od_stats;
- /*
- * statfs optimization: we cache a bit.
- */
- cfs_time_t od_osfs_age;
- cfs_kstatfs_t od_kstatfs;
- cfs_spinlock_t od_osfs_lock;
-
- /**
- * The following flag indicates, if it is interop mode or not.
- * It will be initialized, using mount param.
- */
- __u32 od_iop_mode;
-};
-
-/**
- * Storage representation for fids.
- *
- * Variable size, first byte contains the length of the whole record.
- */
-struct osd_fid_pack {
- unsigned char fp_len;
- char fp_area[sizeof(struct lu_fid)];
-};
-
-struct osd_it_ea_dirent {
- struct lu_fid oied_fid;
- __u64 oied_ino;
- __u64 oied_off;
- unsigned short oied_namelen;
- unsigned int oied_type;
- char oied_name[0];
-} __attribute__((packed));
-
-/**
- * as osd_it_ea_dirent (in memory dirent struct for osd) is greater
- * than lu_dirent struct. osd readdir reads less number of dirent than
- * required for mdd dir page. so buffer size need to be increased so that
- * there would be one ext3 readdir for every mdd readdir page.
- */
-
-#define OSD_IT_EA_BUFSIZE (CFS_PAGE_SIZE + CFS_PAGE_SIZE/4)
-
-/**
- * This is iterator's in-memory data structure in interoperability
- * mode (i.e. iterator over ldiskfs style directory)
- */
-struct osd_it_ea {
- struct osd_object *oie_obj;
- /** used in ldiskfs iterator, to stored file pointer */
- struct file oie_file;
- /** how many entries have been read-cached from storage */
- int oie_rd_dirent;
- /** current entry is being iterated by caller */
- int oie_it_dirent;
- /** current processing entry */
- struct osd_it_ea_dirent *oie_dirent;
- /** buffer to hold entries, size == OSD_IT_EA_BUFSIZE */
- void *oie_buf;
-};
-
-/**
- * Iterator's in-memory data structure for IAM mode.
- */
-struct osd_it_iam {
- struct osd_object *oi_obj;
- struct iam_path_descr *oi_ipd;
- struct iam_iterator oi_it;
-};
-
-struct osd_thread_info {
- const struct lu_env *oti_env;
- /**
- * used for index operations.
- */
- struct dentry oti_obj_dentry;
- struct dentry oti_child_dentry;
-
- /** dentry for Iterator context. */
- struct dentry oti_it_dentry;
-
- struct lu_fid oti_fid;
- struct osd_inode_id oti_id;
- /*
- * XXX temporary: for ->i_op calls.
- */
- struct txn_param oti_txn;
- struct timespec oti_time;
- struct timespec oti_time2;
- /*
- * XXX temporary: fake struct file for osd_object_sync
- */
- struct file oti_file;
- /*
- * XXX temporary: for capa operations.
- */
- struct lustre_capa_key oti_capa_key;
- struct lustre_capa oti_capa;
-
- /**
- * following ipd and it structures are used for osd_index_iam_lookup()
- * these are defined separately as we might do index operation
- * in open iterator session.
- */
-
- /** osd iterator context used for iterator session */
-
- union {
- struct osd_it_iam oti_it;
- /** ldiskfs iterator data structure, see osd_it_ea_{init, fini} */
- struct osd_it_ea oti_it_ea;
- };
-
- /** pre-allocated buffer used by oti_it_ea, size OSD_IT_EA_BUFSIZE */
- void *oti_it_ea_buf;
-
- /** IAM iterator for index operation. */
- struct iam_iterator oti_idx_it;
-
- /** union to guarantee that ->oti_ipd[] has proper alignment. */
- union {
- char oti_it_ipd[DX_IPD_MAX_SIZE];
- long long oti_alignment_lieutenant;
- };
-
- union {
- char oti_idx_ipd[DX_IPD_MAX_SIZE];
- long long oti_alignment_lieutenant_colonel;
- };
-
-
- int oti_r_locks;
- int oti_w_locks;
- int oti_txns;
- /** used in osd_fid_set() to put xattr */
- struct lu_buf oti_buf;
- /** used in osd_ea_fid_set() to set fid into common ea */
- struct lustre_mdt_attrs oti_mdt_attrs;
-#ifdef HAVE_QUOTA_SUPPORT
- struct osd_ctxt oti_ctxt;
-#endif
- struct lu_env oti_obj_delete_tx_env;
-#define OSD_FID_REC_SZ 32
- char oti_ldp[OSD_FID_REC_SZ];
- char oti_ldp2[OSD_FID_REC_SZ];
-};
-
-#ifdef LPROCFS
-/* osd_lproc.c */
-void lprocfs_osd_init_vars(struct lprocfs_static_vars *lvars);
-int osd_procfs_init(struct osd_device *osd, const char *name);
-int osd_procfs_fini(struct osd_device *osd);
-void osd_lprocfs_time_start(const struct lu_env *env);
-void osd_lprocfs_time_end(const struct lu_env *env,
- struct osd_device *osd, int op);
-#endif
-int osd_statfs(const struct lu_env *env, struct dt_device *dev,
- cfs_kstatfs_t *sfs);
-
-/*
- * Invariants, assertions.
- */
-
-/*
- * XXX: do not enable this, until invariant checking code is made thread safe
- * in the face of pdirops locking.
- */
-#define OSD_INVARIANT_CHECKS (0)
-
-#if OSD_INVARIANT_CHECKS
-static inline int osd_invariant(const struct osd_object *obj)
-{
- return
- obj != NULL &&
- ergo(obj->oo_inode != NULL,
- obj->oo_inode->i_sb == osd_sb(osd_obj2dev(obj)) &&
- atomic_read(&obj->oo_inode->i_count) > 0) &&
- ergo(obj->oo_dir != NULL &&
- obj->oo_dir->od_conationer.ic_object != NULL,
- obj->oo_dir->od_conationer.ic_object == obj->oo_inode);
-}
-#else
-#define osd_invariant(obj) (1)
-#endif
-
-/* The on-disk extN format reserves inodes 0-11 for internal filesystem
- * use, and these inodes will be invisible on client side, so the valid
- * sequence for IGIF fid is 12-0xffffffff. But root inode (2#) will be seen
- * on server side (osd), and it should be valid too here.
- */
-#define OSD_ROOT_SEQ 2
-static inline int osd_fid_is_root(const struct lu_fid *fid)
-{
- return fid_seq(fid) == OSD_ROOT_SEQ;
-}
-
-static inline int osd_fid_is_igif(const struct lu_fid *fid)
-{
- return fid_is_igif(fid) || osd_fid_is_root(fid);
-}
-
-#endif /* __KERNEL__ */
-#endif /* _OSD_INTERNAL_H */
git://git.whamcloud.com / fs / lustre-release.git / blobdiff