reiserfscore: constify strings

There are many calls in which strings are passed as "char *" yet aren't
modified. This patch marks them const so callers can depend on it.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>

include/misc.h

@@ -35,13 +35,13 @@
 #define INVAL_PTR	(void *)-1
 
 void check_memory_msg(void);
-void die(char *fmt, ...) __attribute__ ((format(printf, 1, 2)));
+void die(const char *fmt, ...) __attribute__ ((format(printf, 1, 2)));
 void *getmem(int size);
 void *mem_alloc(int size);
 void freemem(void *p);
-void checkmem(char *p, int size);
+void checkmem(const char *p, int size);
 void *expandmem(void *p, int size, int by);
-unsigned int get_mem_size(char *p);
+unsigned int get_mem_size(const char *p);
 void check_and_free_mem(void);
 char *kdevname(int dev);
 
@@ -57,8 +57,8 @@ typedef struct mount_hint {
 	__u32 flags;		/* Mount flags. */
 } mount_hint_t;
 
-struct mntent *misc_mntent(char *device);
-int misc_device_mounted(char *device);
+struct mntent *misc_mntent(const char *device);
+int misc_device_mounted(const char *device);
 
 typedef struct dma_info {
 	int fd;
@@ -73,7 +73,7 @@ int get_dma_info(dma_info_t *dma_info);
 void clean_after_dma_check(int fd, dma_info_t *dma_info);
 
 int valid_offset(int fd, loff_t offset);
-unsigned long count_blocks(char *filename, int blocksize);
+unsigned long count_blocks(const char *filename, int blocksize);
 
 void print_how_far(FILE * fp, unsigned long *passed, unsigned long total,
 		   unsigned int inc, int quiet);
@@ -81,7 +81,7 @@ void print_how_fast(unsigned long total, unsigned long passed, int cursor_pos,
 		    int reset_time);
 __u32 get_random(void);
 
-int user_confirmed(FILE * fp, char *q, char *yes);
+int user_confirmed(FILE * fp, const char *q, const char *yes);
 
 /* Only le bitops operations are used. */
 static inline int misc_set_bit(unsigned long long nr, void *addr)
@@ -223,7 +223,7 @@ static inline unsigned long long misc_find_next_set_bit(const void *vaddr,
 }
 
 #define STAT_FIELD_H(Field, Type)	\
-inline Type misc_device_##Field(char *device);
+inline Type misc_device_##Field(const char *device);
 
 STAT_FIELD_H(mode, mode_t);
 STAT_FIELD_H(rdev, dev_t);

include/reiserfs_fs.h

@@ -1468,7 +1468,7 @@ void init_path (struct reiserfs_path *);
                                 	   data items and indirect items */
 #define PRINT_DIRECT_ITEMS 	0x8 	/* print contents of direct items */
 
-void print_tb (int mode, int item_pos, int pos_in_item, struct tree_balance * tb, char * mes);
+void print_tb (int mode, int item_pos, int pos_in_item, struct tree_balance * tb, const char * mes);
 
 
 void print_bmap (FILE * fp, reiserfs_filsys_t fs, int silent);

include/reiserfs_lib.h

@@ -77,7 +77,7 @@ void init_tb_struct(struct tree_balance *tb, reiserfs_filsys_t ,
 
 reiserfs_filsys_t reiserfs_open(const char *filename, int flags, int *error,
 				 void *vp, int skip_check);
-reiserfs_filsys_t reiserfs_create(char *filename, int version,
+reiserfs_filsys_t reiserfs_create(const char *filename, int version,
 				   unsigned long block_count, int block_size,
 				   int default_journal, int new_format);
 void reiserfs_flush(reiserfs_filsys_t );
@@ -112,12 +112,12 @@ void reiserfs_insert_item(reiserfs_filsys_t , struct reiserfs_path *path,
 			  struct item_head *ih, const void *body);
 
 int reiserfs_locate_entry(reiserfs_filsys_t , struct reiserfs_key *dir,
-			  char *name, struct reiserfs_path *path);
+			  const char *name, struct reiserfs_path *path);
 int reiserfs_find_entry(reiserfs_filsys_t , struct reiserfs_key *dir,
-			char *name, unsigned int *min_gen_counter,
+			const char *name, unsigned int *min_gen_counter,
 			struct reiserfs_key *key);
 int reiserfs_add_entry(reiserfs_filsys_t , struct reiserfs_key *dir,
-		       char *name, int name_len, struct reiserfs_key *key,
+		       const char *name, int name_len, struct reiserfs_key *key,
 		       __u16 fsck_need);
 
 struct reiserfs_key *uget_lkey(struct reiserfs_path *path);
@@ -139,7 +139,7 @@ int comp_keys_3(const void *k1, const void *k2);
 int comp_short_keys(const void *p_s_key1, const void *p_s_key2);
 int comp_items(struct item_head *p_s_ih, struct reiserfs_path *p_s_path);
 
-__u32 hash_value(hashf_t func, char *name, int namelen);
+__u32 hash_value(hashf_t func, const char *name, int namelen);
 
 int create_dir_sd(reiserfs_filsys_t fs,
 		  struct reiserfs_path *path, struct reiserfs_key *key,
@@ -154,7 +154,7 @@ typedef void (*badblock_func_t) (reiserfs_filsys_t fs,
 
 void mark_badblock(reiserfs_filsys_t fs, struct reiserfs_path *badblock_path,
 		   void *data);
-int create_badblock_bitmap(reiserfs_filsys_t fs, char *badblocks_file);
+int create_badblock_bitmap(reiserfs_filsys_t fs, const char *badblocks_file);
 void add_badblock_list(reiserfs_filsys_t fs, int no_badblock_in_tree_yet);
 void badblock_list(reiserfs_filsys_t fs, badblock_func_t action, void *data);
 #define reiserfs_fs_bmap_nr(fs) reiserfs_bmap_nr(get_sb_block_count(fs->fs_ondisk_sb), fs->fs_blocksize)
@@ -221,7 +221,7 @@ void reiserfs_bitmap_fill(reiserfs_bitmap_t *bm);
 unsigned int reiserfs_bitmap_ones(reiserfs_bitmap_t *bm);
 unsigned int reiserfs_bitmap_zeros(reiserfs_bitmap_t *bm);
 
-FILE *open_file(char *filename, char *option);
+FILE *open_file(const char *filename, char *option);
 void close_file(FILE * fp);
 void reiserfs_bitmap_save(FILE * fp, reiserfs_bitmap_t *bm);
 
@@ -255,11 +255,11 @@ int get_reiserfs_format(struct reiserfs_super_block *sb);
 int reiserfs_super_block_size(struct reiserfs_super_block *rs);
 /*int magic_2_version (struct reiserfs_super_block * rs);*/
 int is_prejournaled_reiserfs(struct reiserfs_super_block *rs);
-int who_is_this(char *buf, int blocksize);
+int who_is_this(const char *buf, int blocksize);
 
-int leaf_count_ih(char *buf, int blocksize);
-int leaf_free_space_estimate(char *buf, int blocksize);
-int is_a_leaf(char *buf, int blocksize);
+int leaf_count_ih(const char *buf, int blocksize);
+int leaf_free_space_estimate(const char *buf, int blocksize);
+int is_a_leaf(const char *buf, int blocksize);
 int leaf_item_number_estimate(struct buffer_head *bh);
 
 char *which_block(int code);
@@ -270,7 +270,7 @@ int block_of_bitmap(reiserfs_filsys_t , unsigned long block);
 int block_of_journal(reiserfs_filsys_t , unsigned long block);
 int is_tree_node(struct buffer_head *bh, int level);
 int is_properly_hashed(reiserfs_filsys_t ,
-		       char *name, int namelen, __u32 offset);
+		       const char *name, int namelen, __u32 offset);
 int dir_entry_bad_location(struct reiserfs_de_head *deh,
 			   struct item_head *ih, int first);
 void make_dir_stat_data(int blocksize, int key_format,
@@ -300,7 +300,7 @@ void set_type_and_offset(int format, struct reiserfs_key *key, loff_t offset,
 			 int type);
 
 typedef int (*check_unfm_func_t) (reiserfs_filsys_t , __u32);
-int is_it_bad_item(reiserfs_filsys_t , struct item_head *, char *,
+int is_it_bad_item(reiserfs_filsys_t , struct item_head *, const char *,
 		   check_unfm_func_t, int bad_dir);
 
 #define hash_func_is_unknown(fs) ((fs)->fs_hash_function == NULL)
@@ -310,8 +310,8 @@ int known_hashes(void);
 char *code2name(unsigned int code);
 int func2code(hashf_t func);
 hashf_t code2func(unsigned int code);
-hashf_t name2func(char *hash);
-int find_hash_in_use(char *name, int namelen, __u32 deh_offset,
+hashf_t name2func(const char *hash);
+int find_hash_in_use(const char *name, int namelen, __u32 deh_offset,
 		     unsigned int code_to_try_first);
 
 int entry_length(struct item_head *ih, struct reiserfs_de_head *deh,
@@ -319,7 +319,7 @@ int entry_length(struct item_head *ih, struct reiserfs_de_head *deh,
 char *name_in_entry(struct reiserfs_de_head *deh, int pos_in_item);
 int name_in_entry_length(struct item_head *ih,
 			 struct reiserfs_de_head *deh, int pos_in_item);
-int name_length(char *name, int key_format);
+int name_length(const char *name, int key_format);
 
 /*  access to stat data fields */
 void get_set_sd_field(int field, struct item_head *ih, void *sd,
@@ -371,9 +371,9 @@ typedef void (*action_on_block_t) (reiserfs_filsys_t , reiserfs_trans_t *,
 void for_each_block(reiserfs_filsys_t fs, reiserfs_trans_t *trans,
 		    action_on_block_t action);
 
-int reiserfs_open_journal(reiserfs_filsys_t , char *, int flags);
+int reiserfs_open_journal(reiserfs_filsys_t , const char *, int flags);
 int reiserfs_journal_params_check(reiserfs_filsys_t fs);
-int reiserfs_create_journal(reiserfs_filsys_t fs, char *j_filename,
+int reiserfs_create_journal(reiserfs_filsys_t fs, const char *j_filename,
 			    unsigned long offset, unsigned long len,
 			    int transaction_max_size, int force);
 int reiserfs_journal_opened(reiserfs_filsys_t );
@@ -390,7 +390,7 @@ __u32 advise_journal_max_trans_len(__u32 desired, __u32 journal_size,
 /* prints.c */
 void print_indirect_item(FILE * fp, struct buffer_head *bh, int item_num);
 void print_block(FILE * fp, reiserfs_filsys_t , struct buffer_head *bh, ...);	//int print_mode, int first, int last);
-int print_super_block(FILE * fp, reiserfs_filsys_t , char *file_name,
+int print_super_block(FILE * fp, reiserfs_filsys_t , const char *file_name,
 		      struct buffer_head *bh, int short_print);
 void print_journal(reiserfs_filsys_t );
 void print_journal_header(reiserfs_filsys_t fs);
@@ -402,7 +402,7 @@ void print_filesystem_state(FILE * fp, reiserfs_filsys_t fs);
 void print_one_transaction(reiserfs_filsys_t fs, reiserfs_trans_t *trans);
 void print_journal_params(FILE * fp, struct journal_params *jp);
 char *get_reiserfs_version(__u16 version);
-int can_we_format_it(char *device_name, int force);
+int can_we_format_it(const char *device_name, int force);
 
 #define reiserfs_panic(fmt, list...) \
 {\

lib/misc.c

@@ -28,7 +28,7 @@
 /* End Debian mods */
 
 #define STAT_FIELD(Field, Type)						\
-inline Type misc_device_##Field(char *device) {				\
+inline Type misc_device_##Field(const char *device) {			\
 	struct stat st;							\
 									\
 	if (stat(device, &st) == 0)					\
@@ -43,7 +43,7 @@ STAT_FIELD(rdev, dev_t);
 STAT_FIELD(size, off_t);
 STAT_FIELD(blocks, blkcnt_t);
 
-void die(char *fmt, ...)
+void die(const char *fmt, ...)
 {
 	static char buf[1024];
 	va_list args;
@@ -61,18 +61,18 @@ void die(char *fmt, ...)
 #define MEM_FREED "__free_"
 #define CONTROL_SIZE (strlen (MEM_BEGIN) + 1 + sizeof (int) + strlen (MEM_END) + 1)
 
-unsigned int get_mem_size(char *p)
+unsigned int get_mem_size(const char *p)
 {
-	char *begin;
+	const char *begin;
 
 	begin = p - strlen(MEM_BEGIN) - 1 - sizeof(int);
 	return *(int *)(begin + strlen(MEM_BEGIN) + 1);
 }
 
-void checkmem(char *p, int size)
+void checkmem(const char *p, int size)
 {
-	char *begin;
-	char *end;
+	const char *begin;
+	const char *end;
 
 	begin = p - strlen(MEM_BEGIN) - 1 - sizeof(int);
 	if (strcmp(begin, MEM_BEGIN))
@@ -170,14 +170,15 @@ void freemem(void *vp)
 	free(p);
 }
 
-typedef int (*func_t) (char *);
+typedef int (*func_t) (const char *);
 
 /* Lookup the @file in the @mntfile. @file is mntent.mnt_fsname if @fsname
    is set; mntent.mnt_dir otherwise. Return the mnt entry from the @mntfile.
 
    Warning: if the root fs is mounted RO, the content of /etc/mtab may be
    not correct. */
-static struct mntent *misc_mntent_lookup(char *mntfile, char *file, int path)
+static struct mntent *misc_mntent_lookup(const char *mntfile, const char *file,
+					 int path)
 {
 	struct mntent *mnt;
 	int name_match = 0;
@@ -249,7 +250,7 @@ static struct mntent *misc_mntent_lookup(char *mntfile, char *file, int path)
 	return mnt;
 }
 
-static int misc_root_mounted(char *device)
+static int misc_root_mounted(const char *device)
 {
 	struct stat rootst, devst;
 
@@ -267,7 +268,7 @@ static int misc_root_mounted(char *device)
 	return 1;
 }
 
-static int misc_file_ro(char *file)
+static int misc_file_ro(const char *file)
 {
 	if (utime(file, NULL) == -1) {
 		if (errno == EROFS)
@@ -277,7 +278,7 @@ static int misc_file_ro(char *file)
 	return 0;
 }
 
-struct mntent *misc_mntent(char *device)
+struct mntent *misc_mntent(const char *device)
 {
 	int proc = 0, path = 0, root = 0;
 
@@ -340,7 +341,7 @@ struct mntent *misc_mntent(char *device)
 	return (!proc && !path) ? INVAL_PTR : NULL;
 }
 
-int misc_device_mounted(char *device)
+int misc_device_mounted(const char *device)
 {
 	struct mntent *mnt;
 
@@ -404,7 +405,7 @@ void print_how_fast(unsigned long passed, unsigned long total,
 	fflush(stderr);
 }
 
-static char *strs[] =
+static const char *strs[] =
     { "0%", ".", ".", ".", ".", "20%", ".", ".", ".", ".", "40%", ".", ".", ".",
 ".", "60%", ".", ".", ".", ".", "80%", ".", ".", ".", ".", "100%" };
 
@@ -488,7 +489,7 @@ int valid_offset(int fd, loff_t offset)
 
 /* calculates number of blocks in a file. Returns 0 for "sparse"
    regular files and files other than regular files and block devices */
-unsigned long count_blocks(char *filename, int blocksize)
+unsigned long count_blocks(const char *filename, int blocksize)
 {
 	loff_t high, low;
 	unsigned long sz;
@@ -814,7 +815,7 @@ void clean_after_dma_check(int fd, dma_info_t *dma_info)
 		close(dma_info->fd);
 }
 
-int user_confirmed(FILE * fp, char *q, char *yes)
+int user_confirmed(FILE * fp, const char *q, const char *yes)
 {
 	char *answer = NULL;
 	size_t n = 0;

reiserfscore/bitmap.c

@@ -414,7 +414,7 @@ void reiserfs_bitmap_fill(reiserfs_bitmap_t *bm)
 #define BITMAP_START_MAGIC 374031
 #define BITMAP_END_MAGIC 7786472
 
-FILE *open_file(char *filename, char *option)
+FILE *open_file(const char *filename, char *const option)
 {
 	FILE *fp = fopen(filename, option);
 	if (!fp) {

reiserfscore/journal.c

@@ -471,7 +471,8 @@ int reiserfs_journal_params_check(reiserfs_filsys_t fs)
 
 /* read journal header and make sure that it matches with the filesystem
    opened */
-int reiserfs_open_journal(reiserfs_filsys_t fs, char *j_filename, int flags)
+int reiserfs_open_journal(reiserfs_filsys_t fs, const char *j_filename,
+			  int flags)
 {
 	struct reiserfs_super_block *sb;
 	__u64 count;
@@ -551,7 +552,7 @@ int reiserfs_open_journal(reiserfs_filsys_t fs, char *j_filename, int flags)
 
 /* initialize super block's journal related fields and journal header fields.
  * If len is 0 - make journal of default size */
-int reiserfs_create_journal(reiserfs_filsys_t fs, char *j_device,	/* journal device name */
+int reiserfs_create_journal(reiserfs_filsys_t fs, const char *j_device,	/* journal device name */
 			    unsigned long offset,	/* journal offset on the j_device */
 			    unsigned long len,	/* including journal header */
 			    int transaction_max_size, int force)

reiserfscore/node_formats.c

@@ -5,9 +5,9 @@
 
 #include "includes.h"
 
-int leaf_count_ih(char *buf, int blocksize)
+int leaf_count_ih(const char *buf, int blocksize)
 {
-	struct item_head *ih;
+	const struct item_head *ih;
 	int prev_location;
 	int nr;
 
@@ -30,10 +30,10 @@ int leaf_count_ih(char *buf, int blocksize)
 	return nr;
 }
 
-int leaf_free_space_estimate(char *buf, int blocksize)
+int leaf_free_space_estimate(const char *buf, int blocksize)
 {
-	struct block_head *blkh;
-	struct item_head *ih;
+	const struct block_head *blkh;
+	const struct item_head *ih;
 	int nr;
 
 	blkh = (struct block_head *)buf;
@@ -44,7 +44,7 @@ int leaf_free_space_estimate(char *buf, int blocksize)
 	    IH_SIZE * nr;
 }
 
-static int leaf_blkh_correct(char *buf, int blocksize)
+static int leaf_blkh_correct(const char *buf, int blocksize)
 {
 	struct block_head *blkh;
 	unsigned int nr;
@@ -62,9 +62,9 @@ static int leaf_blkh_correct(char *buf, int blocksize)
 					blocksize) == get_blkh_free_space(blkh);
 }
 
-int is_a_leaf(char *buf, int blocksize)
+int is_a_leaf(const char *buf, int blocksize)
 {
-	struct block_head *blkh;
+	const struct block_head *blkh;
 	int counted;
 
 	blkh = (struct block_head *)buf;
@@ -84,7 +84,7 @@ int is_a_leaf(char *buf, int blocksize)
 
 int leaf_item_number_estimate(struct buffer_head *bh)
 {
-	struct block_head *blkh;
+	const struct block_head *blkh;
 	int nr;
 
 	nr = leaf_count_ih(bh->b_data, bh->b_size);
@@ -174,9 +174,9 @@ static int does_node_have_ih_array(char *buf, int blocksize)
 #endif
 
 /* returns 1 if buf looks like an internal node, 0 otherwise */
-static int is_correct_internal(char *buf, int blocksize)
+static int is_correct_internal(const char *buf, int blocksize)
 {
-	struct block_head *blkh;
+	const struct block_head *blkh;
 	unsigned int nr;
 	int used_space;
 
@@ -210,9 +210,9 @@ int is_tree_node(struct buffer_head *bh, int level)
 	return is_correct_internal(bh->b_data, bh->b_size);
 }
 
-static int is_desc_block(char *buf, unsigned long buf_size)
+static int is_desc_block(const char *buf, unsigned long buf_size)
 {
-	struct reiserfs_journal_desc *desc =
+	const struct reiserfs_journal_desc *desc =
 	    (struct reiserfs_journal_desc *)buf;
 	if (!memcmp(buf + buf_size - 12, JOURNAL_DESC_MAGIC, 8)
 	    && le32_to_cpu(desc->j2_len) > 0)
@@ -299,7 +299,7 @@ int does_look_like_super_block(struct reiserfs_super_block *sb)
 
 /* returns code of reiserfs metadata block (leaf, internal, super
    block, journal descriptor), unformatted */
-int who_is_this(char *buf, int blocksize)
+int who_is_this(const char *buf, int blocksize)
 {
 	int res;
 
@@ -492,7 +492,7 @@ static int does_ih_look_correct(struct item_head *ih)
 /* check item length, ih_free_space for pure 3.5 format, unformatted node
    pointers */
 static int is_bad_indirect(reiserfs_filsys_t fs, struct item_head *ih,
-			   char *item, check_unfm_func_t check_unfm_func)
+			   const char *item, check_unfm_func_t check_unfm_func)
 {
 	unsigned int i;
 	__le32 *ind = (__le32 *) item;
@@ -537,7 +537,7 @@ int known_hashes(void)
 
 /* this also sets hash function */
 int is_properly_hashed(reiserfs_filsys_t fs,
-		       char *name, int namelen, __u32 offset)
+		       const char *name, int namelen, __u32 offset)
 {
 	unsigned int i;
 
@@ -583,7 +583,7 @@ int is_properly_hashed(reiserfs_filsys_t fs,
 	return 0;
 }
 
-int find_hash_in_use(char *name, int namelen, __u32 offset,
+int find_hash_in_use(const char *name, int namelen, __u32 offset,
 		     unsigned int code_to_try_first)
 {
 	unsigned int i;
@@ -638,7 +638,7 @@ hashf_t code2func(unsigned int code)
 	return hashes[code].func;
 }
 
-hashf_t name2func(char *hash)
+hashf_t name2func(const char *hash)
 {
 	unsigned int i;
 
@@ -666,7 +666,7 @@ int dir_entry_bad_location(struct reiserfs_de_head *deh, struct item_head *ih,
 /* the only corruption which is not considered fatal - is hash mismatching. If
    bad_dir is set - directory item having such names is considered bad */
 static int is_bad_directory(reiserfs_filsys_t fs, struct item_head *ih,
-			    char *item, int bad_dir)
+			    const char *item, int bad_dir)
 {
 	int i;
 	int namelen;
@@ -702,7 +702,7 @@ static int is_bad_directory(reiserfs_filsys_t fs, struct item_head *ih,
 }
 
 /* used by debugreisrefs -p only yet */
-int is_it_bad_item(reiserfs_filsys_t fs, struct item_head *ih, char *item,
+int is_it_bad_item(reiserfs_filsys_t fs, struct item_head *ih, const char *item,
 		   check_unfm_func_t check_unfm, int bad_dir)
 {
 	int retval;
@@ -1018,7 +1018,7 @@ int name_in_entry_length(struct item_head *ih,
 	return i;
 }
 
-int name_length(char *name, int key_format)
+int name_length(const char *name, int key_format)
 {
 	if (key_format == KEY_FORMAT_2)
 		return ROUND_UP(strlen(name));

reiserfscore/prints.c

@@ -545,7 +545,7 @@ void print_journal_params(FILE * fp, struct journal_params *jp)
 }
 
 /* return 1 if this is not super block */
-int print_super_block(FILE * fp, reiserfs_filsys_t fs, char *file_name,
+int print_super_block(FILE * fp, reiserfs_filsys_t fs, const char *file_name,
 		      struct buffer_head *bh, int short_print)
 {
 	struct reiserfs_super_block *sb =
@@ -696,7 +696,7 @@ void print_block(FILE * fp, reiserfs_filsys_t fs, struct buffer_head *bh, ...)	/
 {
 	va_list args;
 	int mode, first, last;
-	char *file_name;
+	const char *file_name;
 
 	va_start(args, bh);
 
@@ -719,7 +719,7 @@ void print_block(FILE * fp, reiserfs_filsys_t fs, struct buffer_head *bh, ...)	/
 }
 
 void print_tb(int mode, int item_pos, int pos_in_item, struct tree_balance *tb,
-	      char *mes)
+	      const char *mes)
 {
 	unsigned int h = 0;
 	struct buffer_head *tbSh, *tbFh;
@@ -806,8 +806,9 @@ void print_tb(int mode, int item_pos, int pos_in_item, struct tree_balance *tb,
 	    ("********************** END OF PRINT_TB *******************\n\n");
 }
 
-static void print_bmap_block(FILE * fp, int i, unsigned long block, char *map,
-			     int blocks, int silent, int blocksize)
+static void print_bmap_block(FILE * fp, int i, unsigned long block,
+			     const char *map, int blocks, int silent,
+			     int blocksize)
 {
 	int j, k;
 	int bits = blocksize * 8;

reiserfscore/reiserfslib.c

@@ -185,7 +185,7 @@ found:
 
 /* creates buffer for super block and fills it up with fields which are
    constant for given size and version of a filesystem */
-reiserfs_filsys_t reiserfs_create(char *filename,
+reiserfs_filsys_t reiserfs_create(const char *filename,
 				   int version,
 				   unsigned long block_count,
 				   int block_size,
@@ -866,7 +866,7 @@ void reiserfs_insert_item(reiserfs_filsys_t fs, struct reiserfs_path *path,
 
 /*===========================================================================*/
 
-__u32 hash_value(hashf_t func, char *name, int namelen)
+__u32 hash_value(hashf_t func, const char *name, int namelen)
 {
 	__u32 res;
 
@@ -881,7 +881,7 @@ __u32 hash_value(hashf_t func, char *name, int namelen)
 /* if name is found in a directory - return 1 and set path to the name,
    otherwise return 0 and pathrelse path */
 int reiserfs_locate_entry(reiserfs_filsys_t fs, struct reiserfs_key *dir,
-			  char *name, struct reiserfs_path *path)
+			  const char *name, struct reiserfs_path *path)
 {
 	struct reiserfs_key entry_key;
 	struct item_head *ih;
@@ -944,7 +944,7 @@ int reiserfs_locate_entry(reiserfs_filsys_t fs, struct reiserfs_key *dir,
    generation counter in 'min_gen_counter'. dies if found object is not a
    directory. */
 int reiserfs_find_entry(reiserfs_filsys_t fs, struct reiserfs_key *dir,
-			char *name, unsigned int *min_gen_counter,
+			const char *name, unsigned int *min_gen_counter,
 			struct reiserfs_key *key)
 {
 	struct reiserfs_key entry_key;
@@ -1040,7 +1040,7 @@ int reiserfs_find_entry(reiserfs_filsys_t fs, struct reiserfs_key *dir,
 }
 
 /* compose directory entry: dir entry head and name itself */
-static char *make_entry(char *entry, char *name, struct reiserfs_key *key,
+static char *make_entry(char *entry, const char *name, struct reiserfs_key *key,
 			__u32 offset)
 {
 	struct reiserfs_de_head *deh;
@@ -1068,8 +1068,8 @@ static char *make_entry(char *entry, char *name, struct reiserfs_key *key,
 /* add new name into a directory. If it exists in a directory - do
    nothing */
 int reiserfs_add_entry(reiserfs_filsys_t fs, struct reiserfs_key *dir,
-		       char *name, int name_len, struct reiserfs_key *key,
-		       __u16 fsck_need)
+		       const char *name, int name_len,
+		       struct reiserfs_key *key, __u16 fsck_need)
 {
 	struct item_head entry_ih = { {0,}, };
 	char *entry;
@@ -1229,7 +1229,7 @@ void make_sure_root_dir_exists(reiserfs_filsys_t fs,
 
 /* we only can use a file for filesystem or journal if it is either not
    mounted block device or regular file and we are forced to use it */
-int can_we_format_it(char *device_name, int force)
+int can_we_format_it(const char *device_name, int force)
 {
 	mode_t mode;
 	dev_t rdev;
@@ -1262,7 +1262,7 @@ int can_we_format_it(char *device_name, int force)
 	return 1;
 }
 
-int create_badblock_bitmap(reiserfs_filsys_t fs, char *badblocks_file)
+int create_badblock_bitmap(reiserfs_filsys_t fs, const char *badblocks_file)
 {
 	FILE *fd;
 	char buf[128];