+++ /dev/null
-/*
- * Copyright (C) 2005, 2006
- * Avishay Traeger (avishay@gmail.com)
- * Copyright (C) 2008, 2009
- * Boaz Harrosh <ooo@electrozaur.com>
- *
- * Copyrights for code taken from ext2:
- * Copyright (C) 1992, 1993, 1994, 1995
- * Remy Card (card@masi.ibp.fr)
- * Laboratoire MASI - Institut Blaise Pascal
- * Universite Pierre et Marie Curie (Paris VI)
- * from
- * linux/fs/minix/inode.c
- * Copyright (C) 1991, 1992 Linus Torvalds
- *
- * This file is part of exofs.
- *
- * exofs is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation. Since it is based on ext2, and the only
- * valid version of GPL for the Linux kernel is version 2, the only valid
- * version of GPL for exofs is version 2.
- *
- * exofs 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 for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with exofs; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-#ifndef __EXOFS_H__
-#define __EXOFS_H__
-
-#include <linux/fs.h>
-#include <linux/time.h>
-#include <linux/backing-dev.h>
-#include <scsi/osd_ore.h>
-
-#include "common.h"
-
-#define EXOFS_ERR(fmt, a...) printk(KERN_ERR "exofs: " fmt, ##a)
-
-#ifdef CONFIG_EXOFS_DEBUG
-#define EXOFS_DBGMSG(fmt, a...) \
- printk(KERN_NOTICE "exofs @%s:%d: " fmt, __func__, __LINE__, ##a)
-#else
-#define EXOFS_DBGMSG(fmt, a...) \
- do { if (0) printk(fmt, ##a); } while (0)
-#endif
-
-/* u64 has problems with printk this will cast it to unsigned long long */
-#define _LLU(x) (unsigned long long)(x)
-
-struct exofs_dev {
- struct ore_dev ored;
- unsigned did;
- unsigned urilen;
- uint8_t *uri;
- struct kobject ed_kobj;
-};
-/*
- * our extension to the in-memory superblock
- */
-struct exofs_sb_info {
- struct exofs_sb_stats s_ess; /* Written often, pre-allocate*/
- int s_timeout; /* timeout for OSD operations */
- uint64_t s_nextid; /* highest object ID used */
- uint32_t s_numfiles; /* number of files on fs */
- spinlock_t s_next_gen_lock; /* spinlock for gen # update */
- u32 s_next_generation; /* next gen # to use */
- atomic_t s_curr_pending; /* number of pending commands */
-
- struct ore_layout layout; /* Default files layout */
- struct ore_comp one_comp; /* id & cred of partition id=0*/
- struct ore_components oc; /* comps for the partition */
- struct kobject s_kobj; /* holds per-sbi kobject */
-};
-
-/*
- * our extension to the in-memory inode
- */
-struct exofs_i_info {
- struct inode vfs_inode; /* normal in-memory inode */
- wait_queue_head_t i_wq; /* wait queue for inode */
- unsigned long i_flags; /* various atomic flags */
- uint32_t i_data[EXOFS_IDATA];/*short symlink names and device #s*/
- uint32_t i_dir_start_lookup; /* which page to start lookup */
- uint64_t i_commit_size; /* the object's written length */
- struct ore_comp one_comp; /* same component for all devices */
- struct ore_components oc; /* inode view of the device table */
-};
-
-static inline osd_id exofs_oi_objno(struct exofs_i_info *oi)
-{
- return oi->vfs_inode.i_ino + EXOFS_OBJ_OFF;
-}
-
-/*
- * our inode flags
- */
-#define OBJ_2BCREATED 0 /* object will be created soon*/
-#define OBJ_CREATED 1 /* object has been created on the osd*/
-
-static inline int obj_2bcreated(struct exofs_i_info *oi)
-{
- return test_bit(OBJ_2BCREATED, &oi->i_flags);
-}
-
-static inline void set_obj_2bcreated(struct exofs_i_info *oi)
-{
- set_bit(OBJ_2BCREATED, &oi->i_flags);
-}
-
-static inline int obj_created(struct exofs_i_info *oi)
-{
- return test_bit(OBJ_CREATED, &oi->i_flags);
-}
-
-static inline void set_obj_created(struct exofs_i_info *oi)
-{
- set_bit(OBJ_CREATED, &oi->i_flags);
-}
-
-int __exofs_wait_obj_created(struct exofs_i_info *oi);
-static inline int wait_obj_created(struct exofs_i_info *oi)
-{
- if (likely(obj_created(oi)))
- return 0;
-
- return __exofs_wait_obj_created(oi);
-}
-
-/*
- * get to our inode from the vfs inode
- */
-static inline struct exofs_i_info *exofs_i(struct inode *inode)
-{
- return container_of(inode, struct exofs_i_info, vfs_inode);
-}
-
-/*
- * Maximum count of links to a file
- */
-#define EXOFS_LINK_MAX 32000
-
-/*************************
- * function declarations *
- *************************/
-
-/* inode.c */
-unsigned exofs_max_io_pages(struct ore_layout *layout,
- unsigned expected_pages);
-int exofs_setattr(struct dentry *, struct iattr *);
-int exofs_write_begin(struct file *file, struct address_space *mapping,
- loff_t pos, unsigned len, unsigned flags,
- struct page **pagep, void **fsdata);
-extern struct inode *exofs_iget(struct super_block *, unsigned long);
-struct inode *exofs_new_inode(struct inode *, umode_t);
-extern int exofs_write_inode(struct inode *, struct writeback_control *wbc);
-extern void exofs_evict_inode(struct inode *);
-
-/* dir.c: */
-int exofs_add_link(struct dentry *, struct inode *);
-ino_t exofs_inode_by_name(struct inode *, struct dentry *);
-int exofs_delete_entry(struct exofs_dir_entry *, struct page *);
-int exofs_make_empty(struct inode *, struct inode *);
-struct exofs_dir_entry *exofs_find_entry(struct inode *, struct dentry *,
- struct page **);
-int exofs_empty_dir(struct inode *);
-struct exofs_dir_entry *exofs_dotdot(struct inode *, struct page **);
-ino_t exofs_parent_ino(struct dentry *child);
-int exofs_set_link(struct inode *, struct exofs_dir_entry *, struct page *,
- struct inode *);
-
-/* super.c */
-void exofs_make_credential(u8 cred_a[OSD_CAP_LEN],
- const struct osd_obj_id *obj);
-int exofs_sbi_write_stats(struct exofs_sb_info *sbi);
-
-/* sys.c */
-int exofs_sysfs_init(void);
-void exofs_sysfs_uninit(void);
-int exofs_sysfs_sb_add(struct exofs_sb_info *sbi,
- struct exofs_dt_device_info *dt_dev);
-void exofs_sysfs_sb_del(struct exofs_sb_info *sbi);
-int exofs_sysfs_odev_add(struct exofs_dev *edev,
- struct exofs_sb_info *sbi);
-void exofs_sysfs_dbg_print(void);
-
-/*********************
- * operation vectors *
- *********************/
-/* dir.c: */
-extern const struct file_operations exofs_dir_operations;
-
-/* file.c */
-extern const struct inode_operations exofs_file_inode_operations;
-extern const struct file_operations exofs_file_operations;
-
-/* inode.c */
-extern const struct address_space_operations exofs_aops;
-
-/* namei.c */
-extern const struct inode_operations exofs_dir_inode_operations;
-extern const struct inode_operations exofs_special_inode_operations;
-
-/* exofs_init_comps will initialize an ore_components device array
- * pointing to a single ore_comp struct, and a round-robin view
- * of the device table.
- * The first device of each inode is the [inode->ino % num_devices]
- * and the rest of the devices sequentially following where the
- * first device is after the last device.
- * It is assumed that the global device array at @sbi is twice
- * bigger and that the device table repeats twice.
- * See: exofs_read_lookup_dev_table()
- */
-static inline void exofs_init_comps(struct ore_components *oc,
- struct ore_comp *one_comp,
- struct exofs_sb_info *sbi, osd_id oid)
-{
- unsigned dev_mod = (unsigned)oid, first_dev;
-
- one_comp->obj.partition = sbi->one_comp.obj.partition;
- one_comp->obj.id = oid;
- exofs_make_credential(one_comp->cred, &one_comp->obj);
-
- oc->first_dev = 0;
- oc->numdevs = sbi->layout.group_width * sbi->layout.mirrors_p1 *
- sbi->layout.group_count;
- oc->single_comp = EC_SINGLE_COMP;
- oc->comps = one_comp;
-
- /* Round robin device view of the table */
- first_dev = (dev_mod * sbi->layout.mirrors_p1) % sbi->oc.numdevs;
- oc->ods = &sbi->oc.ods[first_dev];
-}
-
-#endif
projects / linux-2.6-block.git / blobdiff