cregit-Linux how code gets into the kernel

Release 4.11 fs/exofs/exofs.h

Directory: fs/exofs
/*
 * 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 backing_dev_info bdi;		/* register our bdi with VFS  */
	
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; }

Contributors

PersonTokensPropCommitsCommitProp
Boaz Harrosh21100.00%1100.00%
Total21100.00%1100.00%

/* * 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); }

Contributors

PersonTokensPropCommitsCommitProp
Boaz Harrosh23100.00%1100.00%
Total23100.00%1100.00%


static inline void set_obj_2bcreated(struct exofs_i_info *oi) { set_bit(OBJ_2BCREATED, &oi->i_flags); }

Contributors

PersonTokensPropCommitsCommitProp
Boaz Harrosh22100.00%1100.00%
Total22100.00%1100.00%


static inline int obj_created(struct exofs_i_info *oi) { return test_bit(OBJ_CREATED, &oi->i_flags); }

Contributors

PersonTokensPropCommitsCommitProp
Boaz Harrosh23100.00%1100.00%
Total23100.00%1100.00%


static inline void set_obj_created(struct exofs_i_info *oi) { set_bit(OBJ_CREATED, &oi->i_flags); }

Contributors

PersonTokensPropCommitsCommitProp
Boaz Harrosh22100.00%1100.00%
Total22100.00%1100.00%

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); }

Contributors

PersonTokensPropCommitsCommitProp
Boaz Harrosh31100.00%1100.00%
Total31100.00%1100.00%

/* * 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); }

Contributors

PersonTokensPropCommitsCommitProp
Boaz Harrosh25100.00%1100.00%
Total25100.00%1100.00%

/* * 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]; }

Contributors

PersonTokensPropCommitsCommitProp
Boaz Harrosh142100.00%5100.00%
Total142100.00%5100.00%

#endif

Overall Contributors

PersonTokensPropCommitsCommitProp
Boaz Harrosh80690.87%2281.48%
Sachin Bhamare728.12%13.70%
Christoph Hellwig40.45%13.70%
Jens Axboe30.34%13.70%
Al Viro20.23%27.41%
Total887100.00%27100.00%
Directory: fs/exofs
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.