/* object based disk file system * * This code is issued under the GNU General Public License. * See the file COPYING in this distribution * * Copyright (C), 1999, Stelias Computing Inc * * */ #ifndef _OBDFS_H #define OBDFS_H #include #include #include /* super.c */ struct obdfs_pgrq { struct list_head rq_plist; /* linked list of req's */ unsigned long rq_jiffies; struct page *rq_page; /* page to be written */ }; struct list_head obdfs_super_list; /* list of all OBDFS superblocks */ /* dir.c */ #define EXT2_DIR_PAD 4 #define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1) #define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \ ~EXT2_DIR_ROUND) #define EXT2_NAME_LEN 255 #if 0 struct ext2_dir_entry_2 { __u32 inode; /* Inode number */ __u16 rec_len; /* Directory entry length */ __u8 name_len; /* Name length */ __u8 file_type; char name[EXT2_NAME_LEN]; /* File name */ }; #endif int obdfs_check_dir_entry (const char * function, struct inode * dir, struct ext2_dir_entry_2 * de, struct page * page, unsigned long offset); extern struct file_operations obdfs_dir_operations; extern struct inode_operations obdfs_dir_inode_operations; /* file.c */ extern struct file_operations obdfs_file_operations; extern struct inode_operations obdfs_file_inode_operations; /* flush.c */ void obdfs_dequeue_pages(struct inode *inode); int obdfs_flushd_init(void); int obdfs_flushd_cleanup(void); int obdfs_flush_reqs(struct list_head *inode_list, unsigned long check_time); int obdfs_flush_dirty_pages(unsigned long check_time); /* namei.c */ /* * Structure of the super block */ #if 0 struct ext2_super_block { __u32 s_inodes_count; /* Inodes count */ __u32 s_blocks_count; /* Blocks count */ __u32 s_r_blocks_count; /* Reserved blocks count */ __u32 s_free_blocks_count; /* Free blocks count */ __u32 s_free_inodes_count; /* Free inodes count */ __u32 s_first_data_block; /* First Data Block */ __u32 s_log_block_size; /* Block size */ __s32 s_log_frag_size; /* Fragment size */ __u32 s_blocks_per_group; /* # Blocks per group */ __u32 s_frags_per_group; /* # Fragments per group */ __u32 s_inodes_per_group; /* # Inodes per group */ __u32 s_mtime; /* Mount time */ __u32 s_wtime; /* Write time */ __u16 s_mnt_count; /* Mount count */ __s16 s_max_mnt_count; /* Maximal mount count */ __u16 s_magic; /* Magic signature */ __u16 s_state; /* File system state */ __u16 s_errors; /* Behaviour when detecting errors */ __u16 s_minor_rev_level; /* minor revision level */ __u32 s_lastcheck; /* time of last check */ __u32 s_checkinterval; /* max. time between checks */ __u32 s_creator_os; /* OS */ __u32 s_rev_level; /* Revision level */ __u16 s_def_resuid; /* Default uid for reserved blocks */ __u16 s_def_resgid; /* Default gid for reserved blocks */ /* * These fields are for EXT2_DYNAMIC_REV superblocks only. * * Note: the difference between the compatible feature set and * the incompatible feature set is that if there is a bit set * in the incompatible feature set that the kernel doesn't * know about, it should refuse to mount the filesystem. * * e2fsck's requirements are more strict; if it doesn't know * about a feature in either the compatible or incompatible * feature set, it must abort and not try to meddle with * things it doesn't understand... */ __u32 s_first_ino; /* First non-reserved inode */ __u16 s_inode_size; /* size of inode structure */ __u16 s_block_group_nr; /* block group # of this superblock */ __u32 s_feature_compat; /* compatible feature set */ __u32 s_feature_incompat; /* incompatible feature set */ __u32 s_feature_ro_compat; /* readonly-compatible feature set */ __u8 s_uuid[16]; /* 128-bit uuid for volume */ char s_volume_name[16]; /* volume name */ char s_last_mounted[64]; /* directory where last mounted */ __u32 s_algorithm_usage_bitmap; /* For compression */ /* * Performance hints. Directory preallocation should only * happen if the EXT2_COMPAT_PREALLOC flag is on. */ __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/ __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */ __u16 s_padding1; __u32 s_reserved[204]; /* Padding to the end of the block */ }; #endif #define EXT2_SB(sb) (&((sb)->u.ext2_sb)) /* * Maximal count of links to a file */ #define EXT2_LINK_MAX 32000 /* * Ext2 directory file types. Only the low 3 bits are used. The * other bits are reserved for now. */ #define EXT2_FT_UNKNOWN 0 #define EXT2_FT_REG_FILE 1 #define EXT2_FT_DIR 2 #define EXT2_FT_CHRDEV 3 #define EXT2_FT_BLKDEV 4 #define EXT2_FT_FIFO 5 #define EXT2_FT_SOCK 6 #define EXT2_FT_SYMLINK 7 #define EXT2_FT_MAX 8 #define EXT2_BTREE_FL 0x00001000 /* btree format dir */ #define EXT2_RESERVED_FL 0x80000000 /* reserved for ext2 lib */ #define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002 #define EXT2_HAS_COMPAT_FEATURE(sb,mask) \ ( EXT2_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) ) #define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \ ( EXT2_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) ) struct dentry *obdfs_lookup(struct inode * dir, struct dentry *dentry); int obdfs_create (struct inode * dir, struct dentry * dentry, int mode); int obdfs_mkdir(struct inode *dir, struct dentry *dentry, int mode); int obdfs_rmdir(struct inode *dir, struct dentry *dentry); int obdfs_unlink(struct inode *dir, struct dentry *dentry); int obdfs_mknod(struct inode *dir, struct dentry *dentry, int mode, int rdev); int obdfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname); int obdfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry); int obdfs_rename(struct inode *old_dir, struct dentry *old_dentry, struct inode *new_dir, struct dentry *new_dentry); /* rw.c */ int obdfs_do_writepage(struct page *, int sync); int obdfs_init_pgrqcache(void); void obdfs_cleanup_pgrqcache(void); inline void obdfs_pgrq_del(struct obdfs_pgrq *pgrq); int obdfs_readpage(struct file *file, struct page *page); int obdfs_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to); int obdfs_commit_write(struct file *file, struct page *page, unsigned from, unsigned to); int obdfs_writepage(struct page *page); struct page *obdfs_getpage(struct inode *inode, unsigned long offset, int create, int locked); int obdfs_write_one_page(struct file *file, struct page *page, unsigned long offset, unsigned long bytes, const char * buf); int obdfs_do_vec_wr(struct inode **inodes, obd_count num_io, obd_count num_oa, struct obdo **obdos, obd_count *oa_bufs, struct page **pages, char **bufs, obd_size *counts, obd_off *offsets, obd_flag *flags); void obdfs_truncate(struct inode *inode); /* super.c */ extern long obdfs_cache_count; extern long obdfs_mutex_start; /* symlink.c */ extern struct inode_operations obdfs_fast_symlink_inode_operations; extern struct inode_operations obdfs_symlink_inode_operations; /* sysctl.c */ void obdfs_sysctl_init(void); void obdfs_sysctl_clean(void); static inline struct obdfs_sb_info *obdfs_i2sbi(struct inode *inode) { return (struct obdfs_sb_info *) &(inode->i_sb->u.generic_sbp); } static inline struct list_head *obdfs_iplist(struct inode *inode) { struct obdfs_inode_info *info = obdfs_i2info(inode); return &info->oi_pages; } static inline struct list_head *obdfs_islist(struct inode *inode) { struct obdfs_inode_info *info = obdfs_i2info(inode); return &info->oi_inodes; } static inline struct list_head *obdfs_slist(struct inode *inode) { struct obdfs_sb_info *sbi = obdfs_i2sbi(inode); return &sbi->osi_inodes; } #define obd_down(mutex) { \ /* CDEBUG(D_INFO, "get lock\n"); */ \ obdfs_mutex_start = jiffies; \ down(mutex); \ if (jiffies - obdfs_mutex_start) \ CDEBUG(D_CACHE, "waited on mutex %ld jiffies\n", \ jiffies - obdfs_mutex_start); \ } #define obd_up(mutex) { \ up(mutex); \ if (jiffies - obdfs_mutex_start > 1) \ CDEBUG(D_CACHE, "held mutex for %ld jiffies\n", \ jiffies - obdfs_mutex_start); \ /* CDEBUG(D_INFO, "free lock\n"); */ \ } /* We track if a page has been added to the OBD page cache by stting a * flag on the page. We have chosen a bit that will hopefully not be * used for a while. */ #define PG_obdcache 29 #define OBDAddCachePage(page) test_and_set_bit(PG_obdcache, &(page)->flags) #define OBDClearCachePage(page) clear_bit(PG_obdcache, &(page)->flags) static inline void obdfs_print_plist(struct inode *inode) { struct list_head *page_list = obdfs_iplist(inode); struct list_head *tmp; CDEBUG(D_INFO, "inode %ld: page", inode->i_ino); /* obd_down(&obdfs_i2sbi(inode)->osi_list_mutex); */ if (list_empty(page_list)) { CDEBUG(D_INFO, " list empty\n"); obd_up(&obdfs_i2sbi(inode)->osi_list_mutex); return; } tmp = page_list; while ( (tmp = tmp->next) != page_list) { struct obdfs_pgrq *pgrq; pgrq = list_entry(tmp, struct obdfs_pgrq, rq_plist); CDEBUG(D_INFO, " %p", pgrq->rq_page); } CDEBUG(D_INFO, "\n"); /* obd_up(&obdfs_i2sbi(inode)->osi_list_mutex); */ } #include #endif