/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * * Copyright (C) 2001-2003 Cluster File Systems, Inc. * * This file is part of Lustre, http://www.lustre.org. * * Lustre is free software; you can redistribute it and/or * modify it under the terms of version 2 of the GNU General Public * License as published by the Free Software Foundation. * * Lustre 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 Lustre; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * smfs data structures. * See also lustre_idl.h for wire formats of requests. * */ #ifndef __LUSTRE_SMFS_H #define __LUSTRE_SMFS_H struct snap_inode_info { int sn_flags; /* the flags indicated inode type */ int sn_gen; /*the inode generation*/ }; struct smfs_inode_info { struct inode *smi_inode; __u32 smi_flags; struct snap_inode_info sm_sninfo; }; struct journal_operations { void *(*tr_start)(struct inode *, int op); void (*tr_commit)(void *handle); }; struct sm_operations { /* operations on the file store */ struct super_operations sm_sb_ops; struct inode_operations sm_dir_iops; struct inode_operations sm_file_iops; struct inode_operations sm_sym_iops; struct file_operations sm_dir_fops; struct file_operations sm_file_fops; struct file_operations sm_sym_fops; struct dentry_operations sm_dentry_ops; struct journal_operations sm_journal_ops; }; /*smfs rec*/ typedef int (*smfs_pack_rec_func)(char *buffer, struct dentry *dentry, struct inode *dir, void *data1, void *data2, int op); typedef enum { PACK_NORMAL = 0, PACK_OST = 1, PACK_MDS = 2, PACK_MAX = 3, } pack_func_t; struct mds_kml_pack_info { int mpi_bufcount; int mpi_size[4]; int mpi_total_size; }; struct smfs_super_info { struct super_block *smsi_sb; struct vfsmount *smsi_mnt; /* mount the cache kern */ struct fsfilt_operations *sm_cache_fsfilt; /* fsfilt operations */ struct fsfilt_operations *sm_fsfilt; /* fsfilt operations */ struct sm_operations *sm_ops; /* cache ops */ struct lvfs_run_ctxt *smsi_ctxt; struct llog_ctxt *smsi_rec_log; /* smfs kml llog */ struct dentry *smsi_logs_dir; struct dentry *smsi_objects_dir; struct dentry *smsi_delete_dir; /* for delete inode dir */ char *smsi_cache_ftype; /* cache file system type */ char *smsi_ftype; /* file system type */ struct obd_export *smsi_exp; /* file system obd exp */ struct snap_info *smsi_snap_info; /* snap table cow */ smfs_pack_rec_func smsi_pack_rec[PACK_MAX]; /* sm_pack_rec type ops */ __u32 smsi_flags; /* flags */ __u32 smsi_ops_check; }; #define SMFS_FILE_TYPE "smfs" #define SMFS_FILE_MAGIC 0x19760218 struct smfs_file_info { struct file *c_file; int magic; }; struct smfs_proc_args { struct super_block *sr_sb; int sr_count; int sr_flags; void *sr_data; }; struct fs_extent{ __u32 e_block; /* first logical block extent covers */ __u32 e_start; /* first physical block extents lives */ __u32 e_num; /* number of blocks covered by extent */ }; #define I2SMI(inode) ((struct smfs_inode_info *) (&(inode->u.generic_ip))) #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)) #define S2SMI(sb) ((struct smfs_super_info *) (&(sb->u.generic_sbp))) #define S2CSB(sb) (((struct smfs_super_info *) (&(sb->u.generic_sbp)))->smsi_sb) #else #define S2SMI(sb) ((struct smfs_super_info *) (sb->s_fs_info)) #define S2CSB(sb) (((struct smfs_super_info *) (sb->s_fs_info))->smsi_sb) #endif #define I2CI(inode) (((struct smfs_inode_info*) (&(inode->u.generic_ip)))->smi_inode) #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)) #define I2CSB(inode) ((struct smfs_super_info *) (&(inode->i_sb->u.generic_sbp))) #else #define I2CSB(inode) ((struct smfs_super_info *) (inode->i_sb->s_fs_info)) #endif #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)) #define I2FOPS(inode) (((struct smfs_super_info *) \ (&(inode->i_sb->u.generic_sbp)))->sm_cache_fsfilt) #else #define I2FOPS(inode) (((struct smfs_super_info *) \ (inode->i_sb->s_fs_info))->sm_cache_fsfilt) #endif #define I2SNAPOPS(inode) ((S2SMI(inode->i_sb))->smsi_snap_info->snap_cache_fsfilt) #define S2SNAPI(sb) (S2SMI(sb)->smsi_snap_info) #define F2SMFI(file) ((struct smfs_file_info *)((file->private_data))) #define F2CF(file) (((struct smfs_file_info *) ((file->private_data)))->c_file) #define SIZE2BLKS(size, inode) ((size + (I2CI(inode)->i_blksize)) >> (I2CI(inode)->i_blkbits)) #define OFF2BLKS(off, inode) (off >> (I2CI(inode)->i_blkbits)) #define SM_DO_REC 0x1 #define SM_INIT_REC 0x2 #define SM_CACHE_HOOK 0x4 #define SM_OVER_WRITE 0x8 #define SM_DIRTY_WRITE 0x10 #define SM_DO_COW 0x20 #define SMFS_DO_REC(smfs_info) (smfs_info->smsi_flags & SM_DO_REC) #define SMFS_SET_REC(smfs_info) (smfs_info->smsi_flags |= SM_DO_REC) #define SMFS_CLEAN_REC(smfs_info) (smfs_info->smsi_flags &= ~SM_DO_REC) #define SMFS_INIT_REC(smfs_info) (smfs_info->smsi_flags & SM_INIT_REC) #define SMFS_SET_INIT_REC(smfs_info) (smfs_info->smsi_flags |= SM_INIT_REC) #define SMFS_CLEAN_INIT_REC(smfs_info) (smfs_info->smsi_flags &= ~SM_INIT_REC) #define SMFS_SET_INODE_REC(inode) (I2SMI(inode)->smi_flags |= SM_DO_REC) #define SMFS_DO_INODE_REC(inode) (I2SMI(inode)->smi_flags & SM_DO_REC) #define SMFS_CLEAN_INODE_REC(inode) (I2SMI(inode)->smi_flags &= ~SM_DO_REC) #define SMFS_CACHE_HOOK(smfs_info) (smfs_info->smsi_flags & SM_CACHE_HOOK) #define SMFS_SET_CACHE_HOOK(smfs_info) (smfs_info->smsi_flags |= SM_CACHE_HOOK) #define SMFS_CLEAN_CACHE_HOOK(smfs_info) (smfs_info->smsi_flags &= ~SM_CACHE_HOOK) #define SMFS_INODE_CACHE_HOOK(inode) (I2SMI(inode)->smi_flags & SM_CACHE_HOOK) #define SMFS_SET_INODE_CACHE_HOOK(inode) (I2SMI(inode)->smi_flags |= SM_CACHE_HOOK) #define SMFS_CLEAN_INODE_CACHE_HOOK(inode) (I2SMI(inode)->smi_flags &= ~SM_CACHE_HOOK) #define SMFS_INODE_OVER_WRITE(inode) (I2SMI(inode)->smi_flags & SM_OVER_WRITE) #define SMFS_SET_INODE_OVER_WRITE(inode) (I2SMI(inode)->smi_flags |= SM_OVER_WRITE) #define SMFS_CLEAN_INODE_OVER_WRITE(inode) (I2SMI(inode)->smi_flags &= ~SM_OVER_WRITE) #define SMFS_INODE_DIRTY_WRITE(inode) (I2SMI(inode)->smi_flags & SM_DIRTY_WRITE) #define SMFS_SET_INODE_DIRTY_WRITE(inode) (I2SMI(inode)->smi_flags |= SM_DIRTY_WRITE) #define SMFS_CLEAN_INODE_DIRTY_WRITE(inode) (I2SMI(inode)->smi_flags &= ~SM_DIRTY_WRITE) #define SMFS_DO_COW(smfs_info) (smfs_info->smsi_flags & SM_DO_COW) #define SMFS_SET_COW(smfs_info) (smfs_info->smsi_flags |= SM_DO_COW) #define SMFS_CLEAN_COW(smfs_info) (smfs_info->smsi_flags &= ~SM_DO_COW) #define SMFS_SET_INODE_COW(inode) (I2SMI(inode)->smi_flags |= SM_DO_COW) #define SMFS_DO_INODE_COW(inode) (I2SMI(inode)->smi_flags & SM_DO_COW) #define SMFS_CLEAN_INODE_COW(inode) (I2SMI(inode)->smi_flags &= ~SM_DO_COW) #define LVFS_SMFS_BACK_ATTR "lvfs_back_attr" #define REC_COUNT_BIT 0 #define REC_COUNT_MASK 0x01 /*0001*/ #define REC_OP_BIT 1 #define REC_OP_MASK 0x06 /*0110*/ #define REC_WRITE_KML_BIT 3 #define REC_WRITE_KML_MASK 0x08 /*1000*/ #define REC_DEC_LINK_BIT 4 #define REC_DEC_LINK_MASK 0x10 /*10000* different with unlink*/ #define REC_GET_OID_BIT 5 #define REC_GET_OID_MASK 0x20 /*100000*/ #define REC_PACK_TYPE_BIT 6 #define REC_PACK_TYPE_MASK 0x1C0 /*111000000*/ #define SET_REC_COUNT_FLAGS(flag, count_flag) \ (flag |= count_flag << REC_COUNT_BIT) #define GET_REC_COUNT_FLAGS(flag) \ ((flag & REC_COUNT_MASK) >> REC_COUNT_BIT) #define SET_REC_OP_FLAGS(flag, op_flag) \ (flag |= op_flag << REC_OP_BIT) #define GET_REC_OP_FLAGS(flag) \ ((flag & REC_OP_MASK) >> REC_OP_BIT) #define SET_REC_WRITE_KML_FLAGS(flag, op_flag) \ (flag |= op_flag << REC_OP_BIT) #define GET_REC_WRITE_KML_FLAGS(flag) \ ((flag & REC_WRITE_KML_MASK) >> REC_WRITE_KML_BIT) #define SET_REC_DEC_LINK_FLAGS(flag, op_flag) \ (flag |= op_flag << REC_DEC_LINK_BIT) #define GET_REC_DEC_LINK_FLAGS(flag) \ ((flag & REC_DEC_LINK_MASK) >> REC_DEC_LINK_BIT) #define SET_REC_GET_ID_FLAGS(flag, op_flag) \ (flag |= op_flag << REC_GET_OID_BIT) #define GET_REC_GET_OID_FLAGS(flag) \ ((flag & REC_GET_OID_MASK) >> REC_GET_OID_BIT) #define SET_REC_PACK_TYPE_INDEX(flag, op_flag) \ (flag |= op_flag << REC_PACK_TYPE_BIT) #define GET_REC_PACK_TYPE_INDEX(flag) \ ((flag & REC_PACK_TYPE_MASK) >> REC_PACK_TYPE_BIT) #define SMFS_REC_ALL 0x1 #define SMFS_REC_BY_COUNT 0x0 #define SMFS_REINT_REC 0x1 #define SMFS_UNDO_REC 0x2 #define SMFS_WRITE_KML 0x1 #define SMFS_DEC_LINK 0x1 #define SMFS_GET_OID 0x1 #define SMFS_DO_REINT_REC(flag) \ (GET_REC_OP_FLAGS(flag) == SMFS_REINT_REC) #define SMFS_DO_UNDO_REC(flag) \ (GET_REC_OP_FLAGS(flag) == SMFS_UNDO_REC) #define SMFS_DO_REC_ALL(flag) \ (GET_REC_COUNT_FLAGS(flag) == SMFS_REC_ALL) #define SMFS_DO_REC_BY_COUNT(flag) \ (GET_REC_COUNT_FLAGS(flag) == SMFS_REC_BY_COUNT) #define SMFS_DO_WRITE_KML(flag) \ (GET_REC_WRITE_KML_FLAGS(flag) == SMFS_WRITE_KML) #define SMFS_DO_DEC_LINK(flag) \ (GET_REC_DEC_LINK_FLAGS(flag) == SMFS_DEC_LINK) #define SMFS_DO_GET_OID(flag) \ (GET_REC_GET_OID_FLAGS(flag) == SMFS_GET_OID) /*DIRTY flags of write ops*/ #define REINT_EXTENTS_FLAGS "replay_flags" #define SMFS_DIRTY_WRITE 0x01 #define SMFS_OVER_WRITE 0x02 static inline void duplicate_inode(struct inode *dst_inode, struct inode *src_inode) { dst_inode->i_mode = src_inode->i_mode; dst_inode->i_uid = src_inode->i_uid; dst_inode->i_gid = src_inode->i_gid; dst_inode->i_nlink = src_inode->i_nlink; dst_inode->i_size = src_inode->i_size; dst_inode->i_atime = src_inode->i_atime; dst_inode->i_ctime = src_inode->i_ctime; dst_inode->i_mtime = src_inode->i_mtime; dst_inode->i_blksize = src_inode->i_blksize; dst_inode->i_version = src_inode->i_version; dst_inode->i_state = src_inode->i_state; dst_inode->i_generation = src_inode->i_generation; /* This is to make creating special files working. */ dst_inode->i_rdev = src_inode->i_rdev; } static inline void post_smfs_inode(struct inode *inode, struct inode *cache_inode) { if (inode && cache_inode) { duplicate_inode(inode, cache_inode); /*Here we must release the cache_inode, *Otherwise we will have no chance to *do it */ cache_inode->i_state &=~I_LOCK; inode->i_blocks = cache_inode->i_blocks; } } static inline void pre_smfs_inode(struct inode *inode, struct inode *cache_inode) { if (inode && cache_inode) duplicate_inode(cache_inode, inode); } /* instantiate a file handle to the cache file */ static inline void duplicate_file(struct file *dst_file, struct file *src_file) { if (dst_file && src_file) { dst_file->f_pos = src_file->f_pos; dst_file->f_mode = src_file->f_mode; dst_file->f_flags = src_file->f_flags; dst_file->f_owner = src_file->f_owner; dst_file->f_vfsmnt = src_file->f_vfsmnt; #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)) dst_file->f_reada = src_file->f_reada; dst_file->f_ramax = src_file->f_ramax; dst_file->f_raend = src_file->f_raend; dst_file->f_ralen = src_file->f_ralen; dst_file->f_rawin = src_file->f_rawin; #else dst_file->f_ra = src_file->f_ra; #endif } } static inline void duplicate_sb(struct super_block *dst_sb, struct super_block *src_sb) { dst_sb->s_blocksize = src_sb->s_blocksize; dst_sb->s_magic = src_sb->s_magic; dst_sb->s_blocksize_bits = src_sb->s_blocksize_bits; dst_sb->s_maxbytes = src_sb->s_maxbytes; } static inline void d_unalloc(struct dentry *dentry) { #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)) list_del(&dentry->d_hash); INIT_LIST_HEAD(&dentry->d_hash); #else hlist_del_init(&dentry->d_hash); #endif dput(dentry); /* this will free the dentry memory */ } static inline struct dentry *pre_smfs_dentry(struct dentry *parent_dentry, struct inode *cache_inode, struct dentry *dentry) { struct dentry *cache_dentry = NULL; cache_dentry = d_alloc(parent_dentry, &dentry->d_name); if (!cache_dentry) RETURN(NULL); if (!parent_dentry) cache_dentry->d_parent = cache_dentry; if (cache_inode) d_add(cache_dentry, cache_inode); RETURN(cache_dentry); } static inline void post_smfs_dentry(struct dentry *cache_dentry) { if (!cache_dentry) return; if (cache_dentry->d_inode) igrab(cache_dentry->d_inode); d_unalloc(cache_dentry); } static inline int lookup_by_path(char *path, int flags, struct nameidata *nd) { struct dentry *dentry = NULL; int rc = 0; #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)) if (path_init(path, flags, nd)) { #else if (path_lookup(path, flags, nd)) { #endif rc = path_walk(path, nd); if (rc) RETURN(rc); } else { RETURN(-EINVAL); } dentry = nd->dentry; if (!dentry->d_inode || is_bad_inode(dentry->d_inode)) { path_release(nd); RETURN(-ENODEV); } RETURN(rc); } /*FIXME there should be more conditions in this check*/ static inline int smfs_do_rec(struct inode *inode) { struct super_block *sb = inode->i_sb; struct smfs_super_info *smfs_info = S2SMI(sb); if (SMFS_DO_REC(smfs_info) && SMFS_INIT_REC(smfs_info) && SMFS_DO_INODE_REC(inode)) return 1; return 0; } static inline int smfs_cache_hook(struct inode *inode) { struct smfs_super_info *smfs_info = I2CSB(inode); if (SMFS_CACHE_HOOK(smfs_info) && SMFS_INIT_REC(smfs_info) && SMFS_INODE_CACHE_HOOK(inode)) return 1; else return 0; } static inline int smfs_do_cow(struct inode *inode) { struct super_block *sb = inode->i_sb; struct smfs_super_info *smfs_info = S2SMI(sb); if (SMFS_DO_COW(smfs_info) && SMFS_DO_INODE_COW(inode)) return 1; return 0; } /* XXX BUG 3188 -- must return to one set of opcodes */ #define SMFS_TRANS_OP(inode, op) \ { \ if (smfs_do_rec(inode)) \ op = op | 0x10; \ if (smfs_cache_hook(inode)) \ op = op | 0x20; \ } extern int smfs_start_rec(struct super_block *sb, struct vfsmount *mnt); extern int smfs_stop_rec(struct super_block *sb); extern int smfs_write_extents(struct inode *dir, struct dentry *dentry, unsigned long from, unsigned long num); extern int smfs_rec_setattr(struct inode *dir, struct dentry *dentry, struct iattr *attr); extern int smfs_rec_precreate(struct dentry *dentry, int *num, struct obdo *oa); extern int smfs_rec_md(struct inode *inode, void * lmm, int lmm_size); extern int smfs_rec_unpack(struct smfs_proc_args *args, char *record, char **pbuf, int *opcode); int smfs_cow(struct inode *dir, struct dentry *dentry, int op); #endif /* _LUSTRE_SMFS_H */