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422 giacomo 1 
/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
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 * vim:expandtab:shiftwidth=8:tabstop=8:
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 */
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#ifndef __FILTER_H_
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#define __FILTER_H_ 1
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#ifdef __KERNEL__
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/* cachetype.c */
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/*
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 * it is important that things like inode, super and file operations
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 * for intermezzo are not defined statically.  If methods are NULL
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 * the VFS takes special action based on that.  Given that different
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 * cache types have NULL ops at different slots, we must install opeation
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 * talbes for InterMezzo with NULL's in the same spot
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 */
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struct filter_ops {
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        struct super_operations filter_sops;
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        struct inode_operations filter_dir_iops;
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        struct inode_operations filter_file_iops;
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        struct inode_operations filter_sym_iops;
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        struct file_operations filter_dir_fops;
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        struct file_operations filter_file_fops;
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        struct file_operations filter_sym_fops;
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        struct dentry_operations filter_dentry_ops;
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};
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struct cache_ops {
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        /* operations on the file store */
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        struct super_operations *cache_sops;
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        struct inode_operations *cache_dir_iops;
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        struct inode_operations *cache_file_iops;
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        struct inode_operations *cache_sym_iops;
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        struct file_operations *cache_dir_fops;
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        struct file_operations *cache_file_fops;
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        struct file_operations *cache_sym_fops;
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        struct dentry_operations *cache_dentry_ops;
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};
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#define FILTER_DID_SUPER_OPS 0x1
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#define FILTER_DID_INODE_OPS 0x2
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#define FILTER_DID_FILE_OPS 0x4
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#define FILTER_DID_DENTRY_OPS 0x8
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#define FILTER_DID_DEV_OPS 0x10
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#define FILTER_DID_SYMLINK_OPS 0x20
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#define FILTER_DID_DIR_OPS 0x40
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struct filter_fs {
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        int o_flags;
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        struct filter_ops o_fops;
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        struct cache_ops  o_caops;
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        struct journal_ops *o_trops;
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        struct snapshot_ops *o_snops;
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};
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#define FILTER_FS_TYPES 6
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#define FILTER_FS_EXT2 0
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#define FILTER_FS_EXT3 1
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#define FILTER_FS_REISERFS 2
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#define FILTER_FS_XFS 3
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#define FILTER_FS_OBDFS 4
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#define FILTER_FS_TMPFS 5
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extern struct filter_fs filter_oppar[FILTER_FS_TYPES];
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struct filter_fs *filter_get_filter_fs(const char *cache_type);
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void filter_setup_journal_ops(struct filter_fs *ops, char *cache_type);
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inline struct super_operations *filter_c2usops(struct filter_fs *cache);
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inline struct inode_operations *filter_c2ufiops(struct filter_fs *cache);
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inline struct inode_operations *filter_c2udiops(struct filter_fs *cache);
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inline struct inode_operations *filter_c2usiops(struct filter_fs *cache);
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inline struct file_operations *filter_c2uffops(struct filter_fs *cache);
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inline struct file_operations *filter_c2udfops(struct filter_fs *cache);
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inline struct file_operations *filter_c2usfops(struct filter_fs *cache);
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inline struct super_operations *filter_c2csops(struct filter_fs *cache);
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inline struct inode_operations *filter_c2cfiops(struct filter_fs *cache);
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inline struct inode_operations *filter_c2cdiops(struct filter_fs *cache);
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inline struct inode_operations *filter_c2csiops(struct filter_fs *cache);
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inline struct file_operations *filter_c2cffops(struct filter_fs *cache);
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inline struct file_operations *filter_c2cdfops(struct filter_fs *cache);
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inline struct file_operations *filter_c2csfops(struct filter_fs *cache);
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inline struct dentry_operations *filter_c2cdops(struct filter_fs *cache);
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inline struct dentry_operations *filter_c2udops(struct filter_fs *cache);
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void filter_setup_super_ops(struct filter_fs *cache, struct super_operations *cache_ops, struct super_operations *filter_sops);
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void filter_setup_dir_ops(struct filter_fs *cache, struct inode *cache_inode, struct inode_operations *filter_iops, struct file_operations *ffops);
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void filter_setup_file_ops(struct filter_fs *cache, struct inode *cache_inode, struct inode_operations *filter_iops, struct file_operations *filter_op);
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void filter_setup_symlink_ops(struct filter_fs *cache, struct inode *cache_inode, struct inode_operations *filter_iops, struct file_operations *filter_op);
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void filter_setup_dentry_ops(struct filter_fs *cache, struct dentry_operations *cache_dop,  struct dentry_operations *filter_dop);
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#define PRESTO_DEBUG
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#ifdef PRESTO_DEBUG
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/* debugging masks */
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#define D_SUPER     1  
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#define D_INODE     2   /* print entry and exit into procedure */
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#define D_FILE      4
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#define D_CACHE     8   /* cache debugging */
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#define D_MALLOC    16  /* print malloc, de-alloc information */
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#define D_JOURNAL   32
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#define D_UPCALL    64  /* up and downcall debugging */
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#define D_PSDEV    128
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#define D_PIOCTL   256
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#define D_SPECIAL  512
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#define D_TIMING  1024
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#define D_DOWNCALL 2048
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#define FDEBUG(mask, format, a...)                                      \
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        do {                                                            \
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                if (filter_debug & mask) {                              \
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                        printk("(%s,l. %d): ", __FUNCTION__, __LINE__); \
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                        printk(format, ##a); }                          \
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        } while (0)
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#define FENTRY                                                          \
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        if(filter_print_entry)                                          \
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                printk("Process %d entered %s\n", current->pid, __FUNCTION__)
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#define FEXIT                                                           \
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        if(filter_print_entry)                                          \
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                printk("Process %d leaving %s at %d\n", current->pid,   \
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                       __FUNCTION__,__LINE__)
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#endif
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#endif
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#endif