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URL https://opencores.org/ocsvn/or1k_old/or1k_old/trunk

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  • This comparison shows the changes necessary to convert path 
    /or1k_old/trunk/rc203soc/sw/uClinux/fs/msdos
    from Rev 1765 to Rev 1782
    ↔ Reverse comparison
  •

Rev 1765 → Rev 1782

/msdosfs_syms.c
0,0 → 1,47
/*
* linux/fs/msdos/msdosfs_syms.c
*
* Exported kernel symbols for the MS-DOS filesystem.
* These symbols are used by umsdos.
*/
 
#include <linux/module.h>
 
#include <linux/mm.h>
#include <linux/msdos_fs.h>
 
static struct symbol_table msdos_syms = {
#include <linux/symtab_begin.h>
/*
* Support for umsdos fs
*
* These symbols are _always_ exported, in case someone
* wants to install the umsdos module later.
*/
X(msdos_create),
X(msdos_lookup),
X(msdos_mkdir),
X(msdos_read_inode),
X(msdos_rename),
X(msdos_rmdir),
X(msdos_unlink),
X(msdos_unlink_umsdos),
X(msdos_read_super),
X(msdos_put_super),
#include <linux/symtab_end.h>
};
 
struct file_system_type msdos_fs_type = {
msdos_read_super, "msdos", 1, NULL
};
 
 
int init_msdos_fs(void)
{
int status;
 
if ((status = register_filesystem(&msdos_fs_type)) == 0)
status = register_symtab(&msdos_syms);
return status;
}
 
/namei.c
0,0 → 1,831
/*
* linux/fs/msdos/namei.c
*
* Written 1992,1993 by Werner Almesberger
* Hidden files 1995 by Albert Cahalan <albert@ccs.neu.edu> <adc@coe.neu.edu>
*/
 
#define __NO_VERSION__
#include <linux/module.h>
 
#include <linux/sched.h>
#include <linux/msdos_fs.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/stat.h>
 
#include <asm/segment.h>
 
#include "../fat/msbuffer.h"
 
#define PRINTK(x)
 
 
/* MS-DOS "device special files" */
 
static const char *reserved_names[] = {
"CON ","PRN ","NUL ","AUX ",
"LPT1 ","LPT2 ","LPT3 ","LPT4 ",
"COM1 ","COM2 ","COM3 ","COM4 ",
NULL };
 
 
/* Characters that are undesirable in an MS-DOS file name */
static char bad_chars[] = "*?<>|\"";
static char bad_if_strict[] = "+=,; ";
 
 
void msdos_put_super(struct super_block *sb)
{
fat_put_super(sb);
MOD_DEC_USE_COUNT;
}
 
struct super_operations msdos_sops = {
msdos_read_inode,
fat_notify_change,
fat_write_inode,
fat_put_inode,
msdos_put_super,
NULL, /* added in 0.96c */
fat_statfs,
NULL
};
 
struct super_block *msdos_read_super(struct super_block *sb,void *data, int silent)
{
struct super_block *res;
 
MOD_INC_USE_COUNT;
 
MSDOS_SB(sb)->options.isvfat = 0;
sb->s_op = &msdos_sops;
res = fat_read_super(sb, data, silent);
if (res == NULL)
MOD_DEC_USE_COUNT;
 
return res;
}
 
 
 
 
 
/***** Formats an MS-DOS file name. Rejects invalid names. */
static int msdos_format_name(char conv,const char *name,int len,
char *res,int dot_dirs,char dotsOK)
/* conv is relaxed/normal/strict, name is proposed name,
* len is the length of the proposed name, res is the result name,
* dot_dirs is . and .. are OK, dotsOK is if hidden files get dots.
*/
{
char *walk;
const char **reserved;
unsigned char c;
int space;
 
if (name[0] == '.' && (len == 1 || (len == 2 && name[1] == '.'))) {
if (!dot_dirs) return -EEXIST;
memset(res+1,' ',10);
while (len--) *res++ = '.';
return 0;
}
if (name[0] == '.') { /* dotfile because . and .. already done */
if (!dotsOK) return -EINVAL;
/* Get rid of dot - test for it elsewhere */
name++; len--;
}
space = 1; /* disallow names that _really_ start with a dot */
c = 0;
for (walk = res; len && walk-res < 8; walk++) {
c = *name++;
len--;
if (conv != 'r' && strchr(bad_chars,c)) return -EINVAL;
if (conv == 's' && strchr(bad_if_strict,c)) return -EINVAL;
if (c >= 'A' && c <= 'Z' && conv == 's') return -EINVAL;
if (c < ' ' || c == ':' || c == '\\') return -EINVAL;
/* 0xE5 is legal as a first character, but we must substitute 0x05 */
/* because 0xE5 marks deleted files. Yes, DOS really does this. */
/* It seems that Microsoft hacked DOS to support non-US characters */
/* after the 0xE5 character was already in use to mark deleted files. */
if((res==walk) && (c==0xE5)) c=0x05;
if (c == '.') break;
space = (c == ' ');
*walk = (c >= 'a' && c <= 'z') ? c-32 : c;
}
if (space) return -EINVAL;
if (conv == 's' && len && c != '.') {
c = *name++;
len--;
if (c != '.') return -EINVAL;
}
while (c != '.' && len--) c = *name++;
if (c == '.') {
while (walk-res < 8) *walk++ = ' ';
while (len > 0 && walk-res < MSDOS_NAME) {
c = *name++;
len--;
if (conv != 'r' && strchr(bad_chars,c)) return -EINVAL;
if (conv == 's' && strchr(bad_if_strict,c))
return -EINVAL;
if (c < ' ' || c == ':' || c == '\\' || c == '.')
return -EINVAL;
if (c >= 'A' && c <= 'Z' && conv == 's') return -EINVAL;
space = c == ' ';
*walk++ = c >= 'a' && c <= 'z' ? c-32 : c;
}
if (space) return -EINVAL;
if (conv == 's' && len) return -EINVAL;
}
while (walk-res < MSDOS_NAME) *walk++ = ' ';
for (reserved = reserved_names; *reserved; reserved++)
if (!strncmp(res,*reserved,8)) return -EINVAL;
return 0;
}
 
 
/***** Locates a directory entry. Uses unformatted name. */
static int msdos_find(struct inode *dir,const char *name,int len,
struct buffer_head **bh,struct msdos_dir_entry **de,int *ino)
{
char msdos_name[MSDOS_NAME];
int res;
char dotsOK;
char scantype;
 
dotsOK = MSDOS_SB(dir->i_sb)->options.dotsOK;
res = msdos_format_name(MSDOS_SB(dir->i_sb)->options.name_check,
name,len, msdos_name,1,dotsOK);
if (res < 0)
return -ENOENT;
if((name[0]=='.') && dotsOK){
switch(len){
case 0: panic("Empty name in msdos_find!");
case 1: scantype = SCAN_ANY; break;
case 2: scantype = ((name[1]=='.')?SCAN_ANY:SCAN_HID); break;
default: scantype = SCAN_HID;
}
} else {
scantype = (dotsOK ? SCAN_NOTHID : SCAN_ANY);
}
return fat_scan(dir,msdos_name,bh,de,ino,scantype);
}
 
/***** Get inode using directory and name */
int msdos_lookup(struct inode *dir,const char *name,int len,
struct inode **result)
{
struct super_block *sb = dir->i_sb;
int ino,res;
struct msdos_dir_entry *de;
struct buffer_head *bh;
struct inode *next;
PRINTK (("msdos_lookup\n"));
 
*result = NULL;
if (!dir) return -ENOENT;
if (!S_ISDIR(dir->i_mode)) {
iput(dir);
return -ENOENT;
}
PRINTK (("msdos_lookup 2\n"));
if (len == 1 && name[0] == '.') {
*result = dir;
return 0;
}
if (len == 2 && name[0] == '.' && name[1] == '.') {
ino = fat_parent_ino(dir,0);
iput(dir);
if (ino < 0) return ino;
if (!(*result = iget(dir->i_sb,ino))) return -EACCES;
return 0;
}
#if 0
if (dcache_lookup(dir, name, len, (unsigned long *) &ino)) {
iput(dir);
if (!(*result = iget(dir->i_sb, ino)))
return -EACCES;
return 0;
}
#endif
PRINTK (("msdos_lookup 3\n"));
if ((res = msdos_find(dir,name,len,&bh,&de,&ino)) < 0) {
iput(dir);
return res;
}
PRINTK (("msdos_lookup 4\n"));
if (bh)
fat_brelse(sb, bh);
PRINTK (("msdos_lookup 4.5\n"));
if (!(*result = iget(dir->i_sb,ino))) {
iput(dir);
return -EACCES;
}
PRINTK (("msdos_lookup 5\n"));
if (!(*result)->i_sb ||
((*result)->i_sb->s_magic != MSDOS_SUPER_MAGIC)) {
/* crossed a mount point into a non-msdos fs */
iput(dir);
return 0;
}
if (MSDOS_I(*result)->i_busy) { /* mkdir in progress */
iput(*result);
iput(dir);
return -ENOENT;
}
PRINTK (("msdos_lookup 6\n"));
while (MSDOS_I(*result)->i_old) {
next = MSDOS_I(*result)->i_old;
iput(*result);
if (!(*result = iget(next->i_sb,next->i_ino))) {
fat_fs_panic(dir->i_sb,"msdos_lookup: Can't happen");
iput(dir);
return -ENOENT;
}
}
PRINTK (("msdos_lookup 7\n"));
iput(dir);
PRINTK (("msdos_lookup 8\n"));
return 0;
}
 
 
/***** Creates a directory entry (name is already formatted). */
static int msdos_create_entry(struct inode *dir, const char *name,int len,
int is_dir, int is_hid, struct inode **result)
{
struct super_block *sb = dir->i_sb;
struct buffer_head *bh;
struct msdos_dir_entry *de;
int res,ino;
 
if ((res = fat_scan(dir,NULL,&bh,&de,&ino,SCAN_ANY)) < 0) {
if (res != -ENOENT) return res;
if ((dir->i_ino == MSDOS_ROOT_INO) &&
(MSDOS_SB(sb)->fat_bits != 32))
return -ENOSPC;
if ((res = fat_add_cluster(dir)) < 0) return res;
if ((res = fat_scan(dir,NULL,&bh,&de,&ino,SCAN_ANY)) < 0) return res;
}
/*
* XXX all times should be set by caller upon successful completion.
*/
dir->i_ctime = dir->i_mtime = CURRENT_TIME;
dir->i_dirt = 1;
memcpy(de->name,name,MSDOS_NAME);
de->attr = is_dir ? ATTR_DIR : ATTR_ARCH;
de->attr = is_hid ? (de->attr|ATTR_HIDDEN) : (de->attr&~ATTR_HIDDEN);
de->start = 0;
de->starthi = 0;
fat_date_unix2dos(dir->i_mtime,&de->time,&de->date);
de->size = 0;
fat_mark_buffer_dirty(sb, bh, 1);
if ((*result = iget(dir->i_sb,ino)) != NULL)
msdos_read_inode(*result);
fat_brelse(sb, bh);
if (!*result) return -EIO;
(*result)->i_mtime = (*result)->i_atime = (*result)->i_ctime =
CURRENT_TIME;
(*result)->i_dirt = 1;
dcache_add(dir, name, len, ino);
return 0;
}
 
/***** Create a file or directory */
int msdos_create(struct inode *dir,const char *name,int len,int mode,
struct inode **result)
{
struct super_block *sb = dir->i_sb;
struct buffer_head *bh;
struct msdos_dir_entry *de;
char msdos_name[MSDOS_NAME];
int ino,res,is_hid;
 
if (!dir) return -ENOENT;
if ((res = msdos_format_name(MSDOS_SB(dir->i_sb)->options.name_check,
name,len,msdos_name,0,
MSDOS_SB(dir->i_sb)->options.dotsOK)) < 0) {
iput(dir);
return res;
}
is_hid = (name[0]=='.') && (msdos_name[0]!='.');
fat_lock_creation();
/* Scan for existing file twice, so that creating a file fails
* with -EINVAL if the other (dotfile/nondotfile) exists.
* Else SCAN_ANY would do. Maybe use EACCES, EBUSY, ENOSPC, ENFILE?
*/
if (fat_scan(dir,msdos_name,&bh,&de,&ino,SCAN_HID) >= 0) {
fat_unlock_creation();
fat_brelse(sb, bh);
iput(dir);
return is_hid ? -EEXIST : -EINVAL;
}
if (fat_scan(dir,msdos_name,&bh,&de,&ino,SCAN_NOTHID) >= 0) {
fat_unlock_creation();
fat_brelse(sb, bh);
iput(dir);
return is_hid ? -EINVAL : -EEXIST;
}
res = msdos_create_entry(dir,msdos_name,len,S_ISDIR(mode),is_hid,
result);
fat_unlock_creation();
iput(dir);
return res;
}
 
 
#ifdef DEBUG
 
static void dump_fat(struct super_block *sb,int start)
{
printk("[");
while (start) {
printk("%d ",start);
start = fat_access(sb,start,-1);
if (!start) {
printk("ERROR");
break;
}
if (start == -1) break;
}
printk("]\n");
}
 
#endif
 
/***** See if directory is empty */
static int msdos_empty(struct inode *dir)
{
struct super_block *sb = dir->i_sb;
loff_t pos;
struct buffer_head *bh;
struct msdos_dir_entry *de;
 
if (dir->i_count > 1)
return -EBUSY;
if (MSDOS_I(dir)->i_start) { /* may be zero in mkdir */
pos = 0;
bh = NULL;
while (fat_get_entry(dir,&pos,&bh,&de) > -1) {
/* Ignore vfat longname entries */
if (de->attr == ATTR_EXT)
continue;
if (!IS_FREE(de->name) && strncmp(de->name,MSDOS_DOT,
MSDOS_NAME) && strncmp(de->name,MSDOS_DOTDOT,
MSDOS_NAME)) {
fat_brelse(sb, bh);
return -ENOTEMPTY;
}
}
if (bh)
fat_brelse(sb, bh);
}
return 0;
}
 
/***** Remove a directory */
int msdos_rmdir(struct inode *dir,const char *name,int len)
{
struct super_block *sb = dir->i_sb;
int res,ino;
struct buffer_head *bh;
struct msdos_dir_entry *de;
struct inode *inode;
 
bh = NULL;
inode = NULL;
res = -EPERM;
if (name[0] == '.' && (len == 1 || (len == 2 && name[1] == '.')))
goto rmdir_done;
if ((res = msdos_find(dir,name,len,&bh,&de,&ino)) < 0) goto rmdir_done;
res = -ENOENT;
if (!(inode = iget(dir->i_sb,ino))) goto rmdir_done;
res = -ENOTDIR;
if (!S_ISDIR(inode->i_mode)) goto rmdir_done;
res = -EBUSY;
if (dir->i_dev != inode->i_dev || dir == inode)
goto rmdir_done;
res = msdos_empty(inode);
if (res)
goto rmdir_done;
inode->i_nlink = 0;
inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME;
dir->i_nlink--;
inode->i_dirt = dir->i_dirt = 1;
de->name[0] = DELETED_FLAG;
fat_mark_buffer_dirty(sb, bh, 1);
res = 0;
rmdir_done:
fat_brelse(sb, bh);
iput(dir);
iput(inode);
return res;
}
 
/***** Make a directory */
int msdos_mkdir(struct inode *dir,const char *name,int len,int mode)
{
struct super_block *sb = dir->i_sb;
struct buffer_head *bh;
struct msdos_dir_entry *de;
struct inode *inode,*dot;
char msdos_name[MSDOS_NAME];
int ino,res,is_hid;
 
if ((res = msdos_format_name(MSDOS_SB(dir->i_sb)->options.name_check,
name,len,msdos_name,0,
MSDOS_SB(dir->i_sb)->options.dotsOK)) < 0) {
iput(dir);
return res;
}
is_hid = (name[0]=='.') && (msdos_name[0]!='.');
fat_lock_creation();
if (fat_scan(dir,msdos_name,&bh,&de,&ino,SCAN_ANY) >= 0) {
fat_unlock_creation();
fat_brelse(sb, bh);
iput(dir);
return -EEXIST;
}
if ((res = msdos_create_entry(dir,msdos_name,len,1,is_hid,
&inode)) < 0) {
fat_unlock_creation();
iput(dir);
return res;
}
dir->i_nlink++;
inode->i_nlink = 2; /* no need to mark them dirty */
MSDOS_I(inode)->i_busy = 1; /* prevent lookups */
if ((res = fat_add_cluster(inode)) < 0) goto mkdir_error;
if ((res = msdos_create_entry(inode,MSDOS_DOT,1,1,0,&dot)) < 0)
goto mkdir_error;
dot->i_size = inode->i_size; /* doesn't grow in the 2nd create_entry */
MSDOS_I(dot)->i_start = MSDOS_I(inode)->i_start;
MSDOS_I(dot)->i_logstart = MSDOS_I(inode)->i_logstart;
dot->i_nlink = inode->i_nlink;
dot->i_dirt = 1;
iput(dot);
if ((res = msdos_create_entry(inode,MSDOS_DOTDOT,2,1,0,&dot)) < 0)
goto mkdir_error;
fat_unlock_creation();
dot->i_size = dir->i_size;
MSDOS_I(dot)->i_start = MSDOS_I(dir)->i_start;
MSDOS_I(dot)->i_logstart = MSDOS_I(dir)->i_logstart;
dot->i_nlink = dir->i_nlink;
dot->i_dirt = 1;
MSDOS_I(inode)->i_busy = 0;
iput(dot);
iput(inode);
iput(dir);
return 0;
mkdir_error:
iput(inode);
if (msdos_rmdir(dir,name,len) < 0)
fat_fs_panic(dir->i_sb,"rmdir in mkdir failed");
fat_unlock_creation();
return res;
}
 
/***** Unlink a file */
static int msdos_unlinkx(
struct inode *dir,
const char *name,
int len,
int nospc) /* Flag special file ? */
{
struct super_block *sb = dir->i_sb;
int res,ino;
struct buffer_head *bh;
struct msdos_dir_entry *de;
struct inode *inode;
 
bh = NULL;
inode = NULL;
if ((res = msdos_find(dir,name,len,&bh,&de,&ino)) < 0)
goto unlink_done;
if (!(inode = iget(dir->i_sb,ino))) {
res = -ENOENT;
goto unlink_done;
}
if (!S_ISREG(inode->i_mode) && nospc){
res = -EPERM;
goto unlink_done;
}
if (IS_IMMUTABLE(inode)){
res = -EPERM;
goto unlink_done;
}
inode->i_nlink = 0;
inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME;
MSDOS_I(inode)->i_busy = 1;
inode->i_dirt = dir->i_dirt = 1;
de->name[0] = DELETED_FLAG;
fat_mark_buffer_dirty(sb, bh, 1);
unlink_done:
fat_brelse(sb, bh);
iput(inode);
iput(dir);
return res;
}
 
/***** Unlink, as called for msdosfs */
int msdos_unlink(struct inode *dir,const char *name,int len)
{
return msdos_unlinkx (dir,name,len,1);
}
 
/***** Unlink, as called for umsdosfs */
int msdos_unlink_umsdos(struct inode *dir,const char *name,int len)
{
return msdos_unlinkx (dir,name,len,0);
}
 
/***** Rename within a directory */
static int rename_same_dir(struct inode *old_dir,char *old_name,int old_len,
struct inode *new_dir,char *new_name,int new_len,
struct buffer_head *old_bh,
struct msdos_dir_entry *old_de,int old_ino,int is_hid)
{
struct super_block *sb = old_dir->i_sb;
struct buffer_head *new_bh;
struct msdos_dir_entry *new_de;
struct inode *new_inode,*old_inode;
int new_ino,exists,error;
 
if (!strncmp(old_name,new_name,MSDOS_NAME)) goto set_hid;
exists = fat_scan(new_dir,new_name,&new_bh,&new_de,&new_ino,SCAN_ANY) >= 0;
if (*(unsigned char *) old_de->name == DELETED_FLAG) {
if (exists)
fat_brelse(sb, new_bh);
return -ENOENT;
}
if (exists) {
if (!(new_inode = iget(new_dir->i_sb,new_ino))) {
fat_brelse(sb, new_bh);
return -EIO;
}
error = S_ISDIR(new_inode->i_mode)
? (old_de->attr & ATTR_DIR)
? msdos_empty(new_inode)
: -EPERM
: (old_de->attr & ATTR_DIR)
? -EPERM
: 0;
if (!error && (old_de->attr & ATTR_SYS)) error = -EPERM;
if (error) {
iput(new_inode);
fat_brelse(sb, new_bh);
return error;
}
if (S_ISDIR(new_inode->i_mode)) {
new_dir->i_nlink--;
new_dir->i_dirt = 1;
}
new_inode->i_nlink = 0;
MSDOS_I(new_inode)->i_busy = 1;
new_inode->i_dirt = 1;
new_de->name[0] = DELETED_FLAG;
fat_mark_buffer_dirty(sb, new_bh, 1);
dcache_add(new_dir, new_name, new_len, new_ino);
iput(new_inode);
fat_brelse(sb, new_bh);
}
memcpy(old_de->name,new_name,MSDOS_NAME);
set_hid:
old_de->attr = is_hid
? (old_de->attr | ATTR_HIDDEN)
: (old_de->attr &~ ATTR_HIDDEN);
fat_mark_buffer_dirty(sb, old_bh, 1);
/* update binary info for conversion, i_attrs */
if ((old_inode = iget(old_dir->i_sb,old_ino)) != NULL) {
MSDOS_I(old_inode)->i_attrs = is_hid
? (MSDOS_I(old_inode)->i_attrs | ATTR_HIDDEN)
: (MSDOS_I(old_inode)->i_attrs &~ ATTR_HIDDEN);
iput(old_inode);
}
return 0;
}
 
/***** Rename across directories - a nonphysical move */
static int rename_diff_dir(struct inode *old_dir,char *old_name,int old_len,
struct inode *new_dir,char *new_name,int new_len,
struct buffer_head *old_bh,
struct msdos_dir_entry *old_de,int old_ino,int is_hid)
{
struct super_block *sb = old_dir->i_sb;
struct buffer_head *new_bh,*free_bh,*dotdot_bh;
struct msdos_dir_entry *new_de,*free_de,*dotdot_de;
struct inode *old_inode,*new_inode,*free_inode,*dotdot_inode,*walk;
int new_ino,free_ino,dotdot_ino;
int error,exists,ino;
 
if (old_dir->i_dev != new_dir->i_dev) return -EINVAL;
if (old_ino == new_dir->i_ino) return -EINVAL;
if (!(walk = iget(new_dir->i_sb,new_dir->i_ino))) return -EIO;
/* prevent moving directory below itself */
while (walk->i_ino != MSDOS_ROOT_INO) {
ino = fat_parent_ino(walk,1);
iput(walk);
if (ino < 0) return ino;
if (ino == old_ino) return -EINVAL;
if (!(walk = iget(new_dir->i_sb,ino))) return -EIO;
}
iput(walk);
/* find free spot */
while ((error = fat_scan(new_dir,NULL,&free_bh,&free_de,&free_ino,
SCAN_ANY)) < 0) {
if (error != -ENOENT) return error;
error = fat_add_cluster(new_dir);
if (error) return error;
}
exists = fat_scan(new_dir,new_name,&new_bh,&new_de,&new_ino,SCAN_ANY) >= 0;
if (!(old_inode = iget(old_dir->i_sb,old_ino))) {
fat_brelse(sb, free_bh);
if (exists)
fat_brelse(sb, new_bh);
return -EIO;
}
if (*(unsigned char *) old_de->name == DELETED_FLAG) {
iput(old_inode);
fat_brelse(sb, free_bh);
if (exists)
fat_brelse(sb, new_bh);
return -ENOENT;
}
new_inode = NULL; /* to make GCC happy */
if (exists) { /* Trash the old file! */
if (!(new_inode = iget(new_dir->i_sb,new_ino))) {
iput(old_inode);
fat_brelse(sb, new_bh);
return -EIO;
}
error = S_ISDIR(new_inode->i_mode)
? (old_de->attr & ATTR_DIR)
? msdos_empty(new_inode)
: -EPERM
: (old_de->attr & ATTR_DIR)
? -EPERM
: 0;
if (!error && (old_de->attr & ATTR_SYS)) error = -EPERM;
if (error) {
iput(new_inode);
iput(old_inode);
fat_brelse(sb, new_bh);
return error;
}
new_inode->i_nlink = 0;
MSDOS_I(new_inode)->i_busy = 1;
new_inode->i_dirt = 1;
new_de->name[0] = DELETED_FLAG;
fat_mark_buffer_dirty(sb, new_bh, 1);
}
memcpy(free_de,old_de,sizeof(struct msdos_dir_entry));
memcpy(free_de->name,new_name,MSDOS_NAME);
free_de->attr = is_hid
? (free_de->attr|ATTR_HIDDEN)
: (free_de->attr&~ATTR_HIDDEN);
if (!(free_inode = iget(new_dir->i_sb,free_ino))) {
free_de->name[0] = DELETED_FLAG;
/* Don't mark free_bh as dirty. Both states are supposed to be equivalent. */
fat_brelse(sb, free_bh);
if (exists) {
iput(new_inode);
fat_brelse(sb, new_bh);
}
return -EIO;
}
if (exists && S_ISDIR(new_inode->i_mode)) {
new_dir->i_nlink--;
new_dir->i_dirt = 1;
}
msdos_read_inode(free_inode);
MSDOS_I(old_inode)->i_busy = 1;
MSDOS_I(old_inode)->i_linked = free_inode;
MSDOS_I(free_inode)->i_oldlink = old_inode;
fat_cache_inval_inode(old_inode);
old_inode->i_dirt = 1;
old_de->name[0] = DELETED_FLAG;
fat_mark_buffer_dirty(sb, old_bh, 1);
fat_mark_buffer_dirty(sb, free_bh, 1);
if (exists) {
MSDOS_I(new_inode)->i_depend = free_inode;
MSDOS_I(free_inode)->i_old = new_inode;
/* Two references now exist to free_inode so increase count */
free_inode->i_count++;
/* free_inode is put after putting new_inode and old_inode */
iput(new_inode);
dcache_add(new_dir, new_name, new_len, new_ino);
fat_brelse(sb, new_bh);
}
if (S_ISDIR(old_inode->i_mode)) {
if ((error = fat_scan(old_inode,MSDOS_DOTDOT,&dotdot_bh,
&dotdot_de,&dotdot_ino,SCAN_ANY)) < 0) goto rename_done;
if (!(dotdot_inode = iget(old_inode->i_sb,dotdot_ino))) {
fat_brelse(sb, dotdot_bh);
error = -EIO;
goto rename_done;
}
MSDOS_I(dotdot_inode)->i_start = MSDOS_I(new_dir)->i_start;
MSDOS_I(dotdot_inode)->i_logstart = MSDOS_I(new_dir)->i_logstart;
dotdot_de->start = CT_LE_W(MSDOS_I(new_dir)->i_logstart);
dotdot_de->starthi = CT_LE_W((MSDOS_I(new_dir)->i_logstart) >> 16);
dotdot_inode->i_dirt = 1;
fat_mark_buffer_dirty(sb, dotdot_bh, 1);
old_dir->i_nlink--;
new_dir->i_nlink++;
/* no need to mark them dirty */
dotdot_inode->i_nlink = new_dir->i_nlink;
iput(dotdot_inode);
fat_brelse(sb, dotdot_bh);
}
error = 0;
rename_done:
fat_brelse(sb, free_bh);
iput(old_inode);
return error;
}
 
/***** Rename, a wrapper for rename_same_dir & rename_diff_dir */
int msdos_rename(struct inode *old_dir,const char *old_name,int old_len,
struct inode *new_dir,const char *new_name,int new_len,
int must_be_dir)
{
struct super_block *sb = old_dir->i_sb;
char old_msdos_name[MSDOS_NAME],new_msdos_name[MSDOS_NAME];
struct buffer_head *old_bh;
struct msdos_dir_entry *old_de;
int old_ino,error;
int is_hid,old_hid; /* if new file and old file are hidden */
 
if ((error = msdos_format_name(MSDOS_SB(old_dir->i_sb)->options.name_check,
old_name,old_len,old_msdos_name,1,
MSDOS_SB(old_dir->i_sb)->options.dotsOK))
< 0) goto rename_done;
if ((error = msdos_format_name(MSDOS_SB(new_dir->i_sb)->options.name_check,
new_name,new_len,new_msdos_name,0,
MSDOS_SB(new_dir->i_sb)->options.dotsOK))
< 0) goto rename_done;
is_hid = (new_name[0]=='.') && (new_msdos_name[0]!='.');
old_hid = (old_name[0]=='.') && (old_msdos_name[0]!='.');
if ((error = fat_scan(old_dir,old_msdos_name,&old_bh,&old_de,
&old_ino,old_hid?SCAN_HID:SCAN_NOTHID)) < 0) goto rename_done;
fat_lock_creation();
if (old_dir == new_dir)
error = rename_same_dir(old_dir,old_msdos_name,old_len,new_dir,
new_msdos_name,new_len,old_bh,old_de,old_ino,is_hid);
else error = rename_diff_dir(old_dir,old_msdos_name,old_len,new_dir,
new_msdos_name,new_len,old_bh,old_de,old_ino,is_hid);
fat_unlock_creation();
fat_brelse(sb, old_bh);
rename_done:
iput(old_dir);
iput(new_dir);
return error;
}
 
 
/* The public inode operations for the msdos fs */
struct inode_operations msdos_dir_inode_operations = {
&fat_dir_operations, /* default directory file-ops */
msdos_create, /* create */
msdos_lookup, /* lookup */
NULL, /* link */
msdos_unlink, /* unlink */
NULL, /* symlink */
msdos_mkdir, /* mkdir */
msdos_rmdir, /* rmdir */
NULL, /* mknod */
msdos_rename, /* rename */
NULL, /* readlink */
NULL, /* follow_link */
NULL, /* readpage */
NULL, /* writepage */
fat_bmap, /* bmap */
NULL, /* truncate */
NULL /* permission */
};
 
 
void msdos_read_inode(struct inode *inode)
{
fat_read_inode(inode, &msdos_dir_inode_operations);
}
 
 
 
#ifdef MODULE
int init_module(void)
{
return init_msdos_fs();
}
 
 
void cleanup_module(void)
{
unregister_filesystem(&msdos_fs_type);
}
 
#endif
 
/.depend
0,0 → 1,16
msdosfs_syms.o: \
/home/javier/opencores/or1k/rc203soc/sw/uClinux/include/linux/module.h \
/home/javier/opencores/or1k/rc203soc/sw/uClinux/include/linux/mm.h \
/home/javier/opencores/or1k/rc203soc/sw/uClinux/include/linux/msdos_fs.h \
/home/javier/opencores/or1k/rc203soc/sw/uClinux/include/linux/symtab_begin.h \
/home/javier/opencores/or1k/rc203soc/sw/uClinux/include/linux/symtab_end.h
namei.o: \
/home/javier/opencores/or1k/rc203soc/sw/uClinux/include/linux/module.h \
/home/javier/opencores/or1k/rc203soc/sw/uClinux/include/linux/sched.h \
/home/javier/opencores/or1k/rc203soc/sw/uClinux/include/linux/msdos_fs.h \
/home/javier/opencores/or1k/rc203soc/sw/uClinux/include/linux/kernel.h \
/home/javier/opencores/or1k/rc203soc/sw/uClinux/include/linux/errno.h \
/home/javier/opencores/or1k/rc203soc/sw/uClinux/include/linux/string.h \
/home/javier/opencores/or1k/rc203soc/sw/uClinux/include/linux/stat.h \
/home/javier/opencores/or1k/rc203soc/sw/uClinux/include/asm/segment.h \
../fat/msbuffer.h
/Makefile
0,0 → 1,15
#
# Makefile for the linux msdos-filesystem routines.
#
# Note! Dependencies are done automagically by 'make dep', which also
# removes any old dependencies. DON'T put your own dependencies here
# unless it's something special (ie not a .c file).
#
# Note 2! The CFLAGS definitions are now in the main makefile...
 
O_TARGET := msdos.o
O_OBJS := namei.o
OX_OBJS := msdosfs_syms.o
M_OBJS := $(O_TARGET)
 
include $(TOPDIR)/Rules.make

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