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/*
* QNX4 file system, Linux implementation.
*
* Version : 0.1
*
* Using parts of the xiafs filesystem.
*
* History :
*
* 28-05-1998 by Richard Frowijn : first release.
* 20-06-1998 by Frank Denis : Linux 2.1.99+ & dcache support.
*/
#include <linux/config.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/qnx4_fs.h>
#include <linux/stat.h>
#include <asm/segment.h>
static int qnx4_readdir(struct file *filp, void *dirent, filldir_t filldir);
static int qnx4_readdir(struct file *filp, void *dirent, filldir_t filldir)
{
struct inode *inode = filp->f_dentry->d_inode;
unsigned int offset;
struct buffer_head *bh;
struct qnx4_inode_entry *de;
long blknum;
int i;
int size;
blknum = inode->u.qnx4_i.i_first_xtnt.xtnt_blk - 1 +
((filp->f_pos >> 6) >> 3);
QNX4DEBUG(("qnx4_readdir:i_size = %ld\n", (long) inode->i_size));
QNX4DEBUG(("filp->f_pos = %ld\n", (long) filp->f_pos));
QNX4DEBUG(("BlkNum = %ld\n", (long) blknum));
while (filp->f_pos < inode->i_size) {
bh = bread(inode->i_dev, blknum, QNX4_BLOCK_SIZE);
if(bh==NULL)
{
printk(KERN_ERR "qnx4_readdir: bread failed (%ld)\n", blknum);
break;
}
i = (filp->f_pos - (((filp->f_pos >> 6) >> 3) << 9)) & 0x3f;
while (i < QNX4_INODES_PER_BLOCK) {
offset = i * QNX4_DIR_ENTRY_SIZE;
de = (struct qnx4_inode_entry *) (bh->b_data + offset);
size = strlen(de->di_fname);
if (size) {
QNX4DEBUG(("qnx4_readdir:%s\n", de->di_fname));
if ((de->di_mode) || (de->di_status == QNX4_FILE_LINK)) {
if (de->di_status) {
if (filldir(dirent, de->di_fname, size, filp->f_pos, de->di_first_xtnt.xtnt_blk) < 0) {
brelse(bh);
return 0;
}
}
}
}
i++;
filp->f_pos += QNX4_DIR_ENTRY_SIZE;
}
brelse(bh);
blknum++;
}
UPDATE_ATIME(inode);
return 0;
}
static struct file_operations qnx4_dir_operations =
{
NULL, /* lseek - default */
NULL, /* read */
NULL, /* write - bad */
qnx4_readdir, /* readdir */
NULL, /* poll - default */
NULL, /* ioctl - default */
NULL, /* mmap */
NULL, /* no special open code */
NULL, /* no special flush code */
NULL, /* no special release code */
file_fsync, /* default fsync */
NULL, /* default fasync */
NULL, /* default check_media_change */
NULL, /* default revalidate */
};
struct inode_operations qnx4_dir_inode_operations =
{
&qnx4_dir_operations,
#ifdef CONFIG_QNX4FS_RW
qnx4_create,
#else
NULL, /* create */
#endif
qnx4_lookup,
NULL, /* link */
#ifdef CONFIG_QNX4FS_RW
qnx4_unlink, /* unlink */
#else
NULL,
#endif
NULL, /* symlink */
NULL, /* mkdir */
#ifdef CONFIG_QNX4FS_RW
qnx4_rmdir, /* rmdir */
#else
NULL,
#endif
NULL, /* mknod */
NULL, /* rename */
NULL, /* readlink */
NULL, /* follow_link */
NULL, /* get_block */
NULL, /* readpage */
NULL, /* writepage */
NULL, /* flushpage */
NULL, /* truncate */
NULL, /* permission */
NULL, /* smap */
NULL /* revalidate */
};
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