/* readdir returns '..', then '.', then the directory entries in sequence
As the root directory contains a entry for itself, '.' is not emulated
for the root directory */
static int ntfs_readdir(struct file* filp, void *dirent, filldir_t filldir)
{
struct ntfs_filldir cb;
int error;
struct inode *dir=filp->f_dentry->d_inode;
ntfs_debug(DEBUG_OTHER, "ntfs_readdir ino %x mode %x\n",
(unsigned)dir->i_ino,(unsigned int)dir->i_mode);
ntfs_debug(DEBUG_OTHER, "readdir: Looking for file %x dircount %d\n",
(unsigned)filp->f_pos,atomic_read(&dir->i_count));
cb.pl=filp->f_pos & 0xFFFF;
cb.ph=filp->f_pos >> 16;
/* end of directory */
if(cb.ph==0xFFFF){
/* FIXME: Maybe we can return those with the previous call */
switch(cb.pl){
case 0: filldir(dirent,".",1,filp->f_pos,dir->i_ino,DT_DIR);
filp->f_pos=0xFFFF0001;
return 0;
/* FIXME: parent directory */
case 1: filldir(dirent,"..",2,filp->f_pos,0,DT_DIR);
filp->f_pos=0xFFFF0002;
return 0;
}
ntfs_debug(DEBUG_OTHER, "readdir: EOD\n");
return 0;
}
cb.dir=dir;
cb.filldir=filldir;
cb.dirent=dirent;
cb.type=NTFS_INO2VOL(dir)->ngt;
do{
ntfs_debug(DEBUG_OTHER,"looking for next file\n");
error=ntfs_getdir_unsorted(NTFS_LINO2NINO(dir),&cb.ph,&cb.pl,
ntfs_printcb,&cb);
}while(!error && cb.ph!=0xFFFFFFFF);
filp->f_pos=(cb.ph<<16)|cb.pl;
ntfs_debug(DEBUG_OTHER, "new position %x\n",(unsigned)filp->f_pos);
/* -EINVAL is on user buffer full. This is not considered
as an error by sys_getdents */
if(error<0)
error=0;
/* Otherwise (device error, inconsistent data), switch the sign */
return -error;
}
/*
* readdir returns '.', then '..', then the directory entries in sequence.
* As the root directory contains an entry for itself, '.' is not emulated for
* the root directory.
*/
static int ntfs_readdir(struct file* filp, void *dirent, filldir_t filldir)
{
struct inode *dir = filp->f_dentry->d_inode;
int err;
struct ntfs_filldir cb;
cb.ret_code = 0;
cb.pl = filp->f_pos & 0xffff;
cb.ph = (filp->f_pos >> 16) & 0x7fff;
filp->f_pos = (loff_t)(cb.ph << 16) | cb.pl;
ntfs_debug(DEBUG_OTHER, __FUNCTION__ "(): Entering for inode %lu, "
"f_pos 0x%Lx, i_mode 0x%x, i_count %lu.\n", dir->i_ino,
filp->f_pos, (unsigned int)dir->i_mode,
atomic_read(&dir->i_count));
if (!cb.ph) {
/* Start of directory. Emulate "." and "..". */
if (!cb.pl) {
ntfs_debug(DEBUG_OTHER, __FUNCTION__ "(): Calling "
"filldir for . with len 1, f_pos 0x%Lx, "
"inode %lu, DT_DIR.\n", filp->f_pos,
dir->i_ino);
cb.ret_code = filldir(dirent, ".", 1, filp->f_pos,
dir->i_ino, DT_DIR);
if (cb.ret_code)
goto done;
cb.pl++;
filp->f_pos = (loff_t)(cb.ph << 16) | cb.pl;
}
if (cb.pl == (u32)1) {
ntfs_debug(DEBUG_OTHER, __FUNCTION__ "(): Calling "
"filldir for .. with len 2, f_pos 0x%Lx, "
"inode %lu, DT_DIR.\n", filp->f_pos,
filp->f_dentry->d_parent->d_inode->i_ino);
cb.ret_code = filldir(dirent, "..", 2, filp->f_pos,
filp->f_dentry->d_parent->d_inode->i_ino,
DT_DIR);
if (cb.ret_code)
goto done;
cb.pl++;
filp->f_pos = (loff_t)(cb.ph << 16) | cb.pl;
}
} else if (cb.ph >= 0x7fff)
/* End of directory. */
goto done;
cb.dir = dir;
cb.filldir = filldir;
cb.dirent = dirent;
cb.type = NTFS_INO2VOL(dir)->ngt;
do {
ntfs_debug(DEBUG_OTHER, __FUNCTION__ "(): Looking for next "
"file using ntfs_getdir_unsorted(), f_pos "
"0x%Lx.\n", (loff_t)(cb.ph << 16) | cb.pl);
err = ntfs_getdir_unsorted(NTFS_LINO2NINO(dir), &cb.ph, &cb.pl,
ntfs_printcb, &cb);
} while (!err && !cb.ret_code && cb.ph < 0x7fff);
filp->f_pos = (loff_t)(cb.ph << 16) | cb.pl;
ntfs_debug(DEBUG_OTHER, __FUNCTION__ "(): After ntfs_getdir_unsorted()"
" calls, f_pos 0x%Lx.\n", filp->f_pos);
if (!err) {
done:
#ifdef DEBUG
if (!cb.ret_code)
ntfs_debug(DEBUG_OTHER, __FUNCTION__ "(): EOD, f_pos "
"0x%Lx, returning 0.\n", filp->f_pos);
else
ntfs_debug(DEBUG_OTHER, __FUNCTION__ "(): filldir "
"returned %i, returning 0, f_pos "
"0x%Lx.\n", cb.ret_code, filp->f_pos);
#endif
return 0;
}
ntfs_debug(DEBUG_OTHER, __FUNCTION__ "(): Returning %i, f_pos 0x%Lx.\n",
err, filp->f_pos);
return err;
}
