/* 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 _LL_H #define _LL_H #include #include #include #define LL_SUPER_MAGIC 0x0BD00BD0; struct ll_inode_info { int lli_flags; struct list_head lli_inodes; struct list_head lli_pages; char lli_inline[OBD_INLINESZ]; }; struct ll_sb_info { struct list_head ll_list; /* list of supers */ struct obd_conn ll_conn; struct super_block *ll_super; // struct obd_device *ll_obd; //struct obd_ops *ll_ops; ino_t ll_rootino; /* number of root inode */ int ll_minor; /* minor of /dev/obdX */ struct list_head ll_inodes; /* list of dirty inodes */ unsigned long ll_cache_count; struct semaphore ll_list_mutex; }; static inline struct ll_inode_info *ll_i2info(struct inode *inode) { return (struct ll_inode_info *)&(inode->u.generic_ip); } static inline int ll_has_inline(struct inode *inode) { return (ll_i2info(inode)->lli_flags & OBD_FL_INLINEDATA); } static void inline ll_from_inode(struct obdo *oa, struct inode *inode) { struct ll_inode_info *oinfo = ll_i2info(inode); CDEBUG(D_INFO, "src inode %ld, dst obdo %ld valid 0x%08x\n", inode->i_ino, (long)oa->o_id, oa->o_valid); obdo_from_inode(oa, inode); if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { CDEBUG(D_INODE, "copying device %x from inode to obdo\n", inode->i_rdev); *((obd_rdev *)oa->o_inline) = kdev_t_to_nr(inode->i_rdev); oa->o_obdflags |= OBD_FL_INLINEDATA; oa->o_valid |= OBD_MD_FLINLINE; } else if (ll_has_inline(inode)) { CDEBUG(D_INODE, "copying inline data from inode to obdo\n"); memcpy(oa->o_inline, oinfo->lli_inline, OBD_INLINESZ); oa->o_obdflags |= OBD_FL_INLINEDATA; oa->o_valid |= OBD_MD_FLINLINE; } } /* ll_from_inode */ static __inline__ void mds_rep_to_inode(struct inode *dst, struct mds_rep *rep) { if ( rep->valid & OBD_MD_FLID ) dst->i_ino = rep->ino; if ( rep->valid & OBD_MD_FLATIME ) dst->i_atime = rep->atime; if ( rep->valid & OBD_MD_FLMTIME ) dst->i_mtime = rep->mtime; if ( rep->valid & OBD_MD_FLCTIME ) dst->i_ctime = rep->ctime; if ( rep->valid & OBD_MD_FLSIZE ) dst->i_size = rep->size; if ( rep->valid & OBD_MD_FLMODE ) dst->i_mode = rep->mode; if ( rep->valid & OBD_MD_FLUID ) dst->i_uid = rep->uid; if ( rep->valid & OBD_MD_FLGID ) dst->i_gid = rep->gid; if ( rep->valid & OBD_MD_FLFLAGS ) dst->i_flags = rep->flags; if ( rep->valid & OBD_MD_FLNLINK ) dst->i_nlink = rep->nlink; if ( rep->valid & OBD_MD_FLGENER ) dst->i_generation = rep->generation; } static void inline ll_to_inode(struct inode *inode, struct mds_rep *rep) { CDEBUG(D_INFO, "src obdo %d valid 0x%08x, dst inode %ld\n", rep->ino, rep->valid, inode->i_ino); mds_rep_to_inode(inode, rep); #if 0 if (obdo_has_inline(oa)) { if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) || S_ISFIFO(inode->i_mode)) { obd_rdev rdev = *((obd_rdev *)oa->o_inline); CDEBUG(D_INODE, "copying device %x from obdo to inode\n", rdev); init_special_inode(inode, inode->i_mode, rdev); } else { CDEBUG(D_INFO, "copying inline from obdo to inode\n"); memcpy(oinfo->lli_inline, oa->o_inline, OBD_INLINESZ); } oinfo->lli_flags |= OBD_FL_INLINEDATA; } #endif } /* ll_to_inode */ /* super.c */ struct ll_pgrq { struct list_head rq_plist; /* linked list of req's */ unsigned long rq_jiffies; struct page *rq_page; /* page to be written */ }; extern struct list_head ll_super_list; /* list of all LL 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 int ll_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 ll_dir_operations; extern struct inode_operations ll_dir_inode_operations; /* file.c */ extern struct file_operations ll_file_operations; extern struct inode_operations ll_file_inode_operations; /* flush.c */ void ll_dequeue_pages(struct inode *inode); int ll_flushd_init(void); int ll_flushd_cleanup(void); int ll_flush_reqs(struct list_head *inode_list, unsigned long check_time); int ll_flush_dirty_pages(unsigned long check_time); /* namei.c */ /* * Structure of the super block */ #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) ) /* rw.c */ int ll_do_writepage(struct page *, int sync); int ll_init_pgrqcache(void); void ll_cleanup_pgrqcache(void); inline void ll_pgrq_del(struct ll_pgrq *pgrq); int ll_readpage(struct file *file, struct page *page); int ll_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to); int ll_commit_write(struct file *file, struct page *page, unsigned from, unsigned to); int ll_writepage(struct page *page); struct page *ll_getpage(struct inode *inode, unsigned long offset, int create, int locked); int ll_write_one_page(struct file *file, struct page *page, unsigned long offset, unsigned long bytes, const char * buf); int ll_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 ll_truncate(struct inode *inode); /* super.c */ extern long ll_cache_count; extern long ll_mutex_start; /* symlink.c */ extern struct inode_operations ll_fast_symlink_inode_operations; extern struct inode_operations ll_symlink_inode_operations; /* sysctl.c */ void ll_sysctl_init(void); void ll_sysctl_clean(void); static inline struct ll_sb_info *ll_i2sbi(struct inode *inode) { return (struct ll_sb_info *) &(inode->i_sb->u.generic_sbp); } static inline struct list_head *ll_iplist(struct inode *inode) { struct ll_inode_info *info = ll_i2info(inode); return &info->lli_pages; } static inline struct list_head *ll_islist(struct inode *inode) { struct ll_inode_info *info = ll_i2info(inode); return &info->lli_inodes; } static inline struct list_head *ll_slist(struct inode *inode) { struct ll_sb_info *sbi = ll_i2sbi(inode); return &sbi->ll_inodes; } static void inline ll_set_size (struct inode *inode, obd_size size) { inode->i_size = size; inode->i_blocks = (inode->i_size + inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits; } /* ll_set_size */ #define obd_down(mutex) { \ /* CDEBUG(D_INFO, "get lock\n"); */ \ ll_mutex_start = jiffies; \ down(mutex); \ if (jiffies - ll_mutex_start) \ CDEBUG(D_CACHE, "waited on mutex %ld jiffies\n", \ jiffies - ll_mutex_start); \ } #define obd_up(mutex) { \ up(mutex); \ if (jiffies - ll_mutex_start > 1) \ CDEBUG(D_CACHE, "held mutex for %ld jiffies\n", \ jiffies - ll_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 ll_print_plist(struct inode *inode) { struct list_head *page_list = ll_iplist(inode); struct list_head *tmp; CDEBUG(D_INFO, "inode %ld: page", inode->i_ino); /* obd_down(&ll_i2sbi(inode)->ll_list_mutex); */ if (list_empty(page_list)) { CDEBUG(D_INFO, " list empty\n"); obd_up(&ll_i2sbi(inode)->ll_list_mutex); return; } tmp = page_list; while ( (tmp = tmp->next) != page_list) { struct ll_pgrq *pgrq; pgrq = list_entry(tmp, struct ll_pgrq, rq_plist); CDEBUG(D_INFO, " %p", pgrq->rq_page); } CDEBUG(D_INFO, "\n"); /* obd_up(&ll_i2sbi(inode)->ll_list_mutex); */ } #include #endif