/* * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README */ #include <linux/time.h> #include "reiserfs.h" /* * this contains item handlers for old item types: sd, direct, * indirect, directory */ /* * and where are the comments? how about saying where we can find an * explanation of each item handler method? -Hans */ /* stat data functions */ static int sd_bytes_number(struct item_head *ih, int block_size) { … } static void sd_decrement_key(struct cpu_key *key) { … } static int sd_is_left_mergeable(struct reiserfs_key *key, unsigned long bsize) { … } static void sd_print_item(struct item_head *ih, char *item) { … } static void sd_check_item(struct item_head *ih, char *item) { … } static int sd_create_vi(struct virtual_node *vn, struct virtual_item *vi, int is_affected, int insert_size) { … } static int sd_check_left(struct virtual_item *vi, int free, int start_skip, int end_skip) { … } static int sd_check_right(struct virtual_item *vi, int free) { … } static int sd_part_size(struct virtual_item *vi, int first, int count) { … } static int sd_unit_num(struct virtual_item *vi) { … } static void sd_print_vi(struct virtual_item *vi) { … } static struct item_operations stat_data_ops = …; /* direct item functions */ static int direct_bytes_number(struct item_head *ih, int block_size) { … } /* FIXME: this should probably switch to indirect as well */ static void direct_decrement_key(struct cpu_key *key) { … } static int direct_is_left_mergeable(struct reiserfs_key *key, unsigned long bsize) { … } static void direct_print_item(struct item_head *ih, char *item) { … } static void direct_check_item(struct item_head *ih, char *item) { … } static int direct_create_vi(struct virtual_node *vn, struct virtual_item *vi, int is_affected, int insert_size) { … } static int direct_check_left(struct virtual_item *vi, int free, int start_skip, int end_skip) { … } static int direct_check_right(struct virtual_item *vi, int free) { … } static int direct_part_size(struct virtual_item *vi, int first, int count) { … } static int direct_unit_num(struct virtual_item *vi) { … } static void direct_print_vi(struct virtual_item *vi) { … } static struct item_operations direct_ops = …; /* indirect item functions */ static int indirect_bytes_number(struct item_head *ih, int block_size) { … } /* decrease offset, if it becomes 0, change type to stat data */ static void indirect_decrement_key(struct cpu_key *key) { … } /* if it is not first item of the body, then it is mergeable */ static int indirect_is_left_mergeable(struct reiserfs_key *key, unsigned long bsize) { … } /* printing of indirect item */ static void start_new_sequence(__u32 * start, int *len, __u32 new) { … } static int sequence_finished(__u32 start, int *len, __u32 new) { … } static void print_sequence(__u32 start, int len) { … } static void indirect_print_item(struct item_head *ih, char *item) { … } static void indirect_check_item(struct item_head *ih, char *item) { … } static int indirect_create_vi(struct virtual_node *vn, struct virtual_item *vi, int is_affected, int insert_size) { … } static int indirect_check_left(struct virtual_item *vi, int free, int start_skip, int end_skip) { … } static int indirect_check_right(struct virtual_item *vi, int free) { … } /* * return size in bytes of 'units' units. If first == 0 - calculate * from the head (left), otherwise - from tail (right) */ static int indirect_part_size(struct virtual_item *vi, int first, int units) { … } static int indirect_unit_num(struct virtual_item *vi) { … } static void indirect_print_vi(struct virtual_item *vi) { … } static struct item_operations indirect_ops = …; /* direntry functions */ static int direntry_bytes_number(struct item_head *ih, int block_size) { … } static void direntry_decrement_key(struct cpu_key *key) { … } static int direntry_is_left_mergeable(struct reiserfs_key *key, unsigned long bsize) { … } static void direntry_print_item(struct item_head *ih, char *item) { … } static void direntry_check_item(struct item_head *ih, char *item) { … } #define DIRENTRY_VI_FIRST_DIRENTRY_ITEM … /* * function returns old entry number in directory item in real node * using new entry number in virtual item in virtual node */ static inline int old_entry_num(int is_affected, int virtual_entry_num, int pos_in_item, int mode) { … } /* * Create an array of sizes of directory entries for virtual * item. Return space used by an item. FIXME: no control over * consuming of space used by this item handler */ static int direntry_create_vi(struct virtual_node *vn, struct virtual_item *vi, int is_affected, int insert_size) { … } /* * return number of entries which may fit into specified amount of * free space, or -1 if free space is not enough even for 1 entry */ static int direntry_check_left(struct virtual_item *vi, int free, int start_skip, int end_skip) { … } static int direntry_check_right(struct virtual_item *vi, int free) { … } /* sum of entry sizes between from-th and to-th entries including both edges */ static int direntry_part_size(struct virtual_item *vi, int first, int count) { … } static int direntry_unit_num(struct virtual_item *vi) { … } static void direntry_print_vi(struct virtual_item *vi) { … } static struct item_operations direntry_ops = …; /* Error catching functions to catch errors caused by incorrect item types. */ static int errcatch_bytes_number(struct item_head *ih, int block_size) { … } static void errcatch_decrement_key(struct cpu_key *key) { … } static int errcatch_is_left_mergeable(struct reiserfs_key *key, unsigned long bsize) { … } static void errcatch_print_item(struct item_head *ih, char *item) { … } static void errcatch_check_item(struct item_head *ih, char *item) { … } static int errcatch_create_vi(struct virtual_node *vn, struct virtual_item *vi, int is_affected, int insert_size) { … } static int errcatch_check_left(struct virtual_item *vi, int free, int start_skip, int end_skip) { … } static int errcatch_check_right(struct virtual_item *vi, int free) { … } static int errcatch_part_size(struct virtual_item *vi, int first, int count) { … } static int errcatch_unit_num(struct virtual_item *vi) { … } static void errcatch_print_vi(struct virtual_item *vi) { … } static struct item_operations errcatch_ops = …; #if ! (TYPE_STAT_DATA == 0 && TYPE_INDIRECT == 1 && TYPE_DIRECT == 2 && TYPE_DIRENTRY == 3) #error Item types must use disk-format assigned values. #endif struct item_operations *item_ops[TYPE_ANY + 1] = …;
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