#include <linux/fs.h>
#include <linux/jbd2.h>
-#include <linux/ext4_fs.h>
#include <linux/buffer_head.h>
#include <linux/slab.h>
#include <linux/rbtree.h>
+#include "ext4.h"
static unsigned char ext4_filetype_table[] = {
DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK
};
static int ext4_readdir(struct file *, void *, filldir_t);
-static int ext4_dx_readdir(struct file * filp,
- void * dirent, filldir_t filldir);
-static int ext4_release_dir (struct inode * inode,
- struct file * filp);
+static int ext4_dx_readdir(struct file *filp,
+ void *dirent, filldir_t filldir);
+static int ext4_release_dir(struct inode *inode,
+ struct file *filp);
const struct file_operations ext4_dir_operations = {
.llseek = generic_file_llseek,
.read = generic_read_dir,
.readdir = ext4_readdir, /* we take BKL. needed?*/
- .ioctl = ext4_ioctl, /* BKL held */
+ .unlocked_ioctl = ext4_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = ext4_compat_ioctl,
#endif
}
-int ext4_check_dir_entry (const char * function, struct inode * dir,
- struct ext4_dir_entry_2 * de,
- struct buffer_head * bh,
- unsigned long offset)
+int ext4_check_dir_entry(const char *function, struct inode *dir,
+ struct ext4_dir_entry_2 *de,
+ struct buffer_head *bh,
+ unsigned int offset)
{
- const char * error_msg = NULL;
- const int rlen = ext4_rec_len_from_disk(de->rec_len);
+ const char *error_msg = NULL;
+ const int rlen = ext4_rec_len_from_disk(de->rec_len,
+ dir->i_sb->s_blocksize);
if (rlen < EXT4_DIR_REC_LEN(1))
error_msg = "rec_len is smaller than minimal";
error_msg = "inode out of bounds";
if (error_msg != NULL)
- ext4_error (dir->i_sb, function,
+ ext4_error(dir->i_sb, function,
"bad entry in directory #%lu: %s - "
- "offset=%lu, inode=%lu, rec_len=%d, name_len=%d",
+ "offset=%u, inode=%u, rec_len=%d, name_len=%d",
dir->i_ino, error_msg, offset,
- (unsigned long) le32_to_cpu(de->inode),
+ le32_to_cpu(de->inode),
rlen, de->name_len);
return error_msg == NULL ? 1 : 0;
}
-static int ext4_readdir(struct file * filp,
- void * dirent, filldir_t filldir)
+static int ext4_readdir(struct file *filp,
+ void *dirent, filldir_t filldir)
{
int error = 0;
- unsigned long offset;
+ unsigned int offset;
int i, stored;
struct ext4_dir_entry_2 *de;
struct super_block *sb;
int err;
struct inode *inode = filp->f_path.dentry->d_inode;
int ret = 0;
+ int dir_has_error = 0;
sb = inode->i_sb;
struct buffer_head *bh = NULL;
map_bh.b_state = 0;
- err = ext4_get_blocks_wrap(NULL, inode, blk, 1, &map_bh, 0, 0);
+ err = ext4_get_blocks(NULL, inode, blk, 1, &map_bh, 0);
if (err > 0) {
pgoff_t index = map_bh.b_blocknr >>
(PAGE_CACHE_SHIFT - inode->i_blkbits);
* of recovering data when there's a bad sector
*/
if (!bh) {
- ext4_error (sb, "ext4_readdir",
- "directory #%lu contains a hole at offset %lu",
- inode->i_ino, (unsigned long)filp->f_pos);
+ if (!dir_has_error) {
+ ext4_error(sb, __func__, "directory #%lu "
+ "contains a hole at offset %Lu",
+ inode->i_ino,
+ (unsigned long long) filp->f_pos);
+ dir_has_error = 1;
+ }
/* corrupt size? Maybe no more blocks to read */
if (filp->f_pos > inode->i_blocks << 9)
break;
* least that it is non-zero. A
* failure will be detected in the
* dirent test below. */
- if (ext4_rec_len_from_disk(de->rec_len)
- < EXT4_DIR_REC_LEN(1))
+ if (ext4_rec_len_from_disk(de->rec_len,
+ sb->s_blocksize) < EXT4_DIR_REC_LEN(1))
break;
- i += ext4_rec_len_from_disk(de->rec_len);
+ i += ext4_rec_len_from_disk(de->rec_len,
+ sb->s_blocksize);
}
offset = i;
filp->f_pos = (filp->f_pos & ~(sb->s_blocksize - 1))
while (!error && filp->f_pos < inode->i_size
&& offset < sb->s_blocksize) {
de = (struct ext4_dir_entry_2 *) (bh->b_data + offset);
- if (!ext4_check_dir_entry ("ext4_readdir", inode, de,
- bh, offset)) {
+ if (!ext4_check_dir_entry("ext4_readdir", inode, de,
+ bh, offset)) {
/*
* On error, skip the f_pos to the next block
*/
filp->f_pos = (filp->f_pos |
(sb->s_blocksize - 1)) + 1;
- brelse (bh);
+ brelse(bh);
ret = stored;
goto out;
}
- offset += ext4_rec_len_from_disk(de->rec_len);
+ offset += ext4_rec_len_from_disk(de->rec_len,
+ sb->s_blocksize);
if (le32_to_cpu(de->inode)) {
/* We might block in the next section
* if the data destination is
break;
if (version != filp->f_version)
goto revalidate;
- stored ++;
+ stored++;
}
- filp->f_pos += ext4_rec_len_from_disk(de->rec_len);
+ filp->f_pos += ext4_rec_len_from_disk(de->rec_len,
+ sb->s_blocksize);
}
offset = 0;
- brelse (bh);
+ brelse(bh);
}
out:
return ret;
while (n) {
/* Do the node's children first */
- if ((n)->rb_left) {
+ if (n->rb_left) {
n = n->rb_left;
continue;
}
parent = rb_parent(n);
fname = rb_entry(n, struct fname, rb_hash);
while (fname) {
- struct fname * old = fname;
+ struct fname *old = fname;
fname = fname->next;
- kfree (old);
+ kfree(old);
}
if (!parent)
root->rb_node = NULL;
parent->rb_right = NULL;
n = parent;
}
- root->rb_node = NULL;
}
-static struct dir_private_info *create_dir_info(loff_t pos)
+static struct dir_private_info *ext4_htree_create_dir_info(loff_t pos)
{
struct dir_private_info *p;
- p = kmalloc(sizeof(struct dir_private_info), GFP_KERNEL);
+ p = kzalloc(sizeof(struct dir_private_info), GFP_KERNEL);
if (!p)
return NULL;
- p->root.rb_node = NULL;
- p->curr_node = NULL;
- p->extra_fname = NULL;
- p->last_pos = 0;
p->curr_hash = pos2maj_hash(pos);
p->curr_minor_hash = pos2min_hash(pos);
- p->next_hash = 0;
return p;
}
struct ext4_dir_entry_2 *dirent)
{
struct rb_node **p, *parent = NULL;
- struct fname * fname, *new_fn;
+ struct fname *fname, *new_fn;
struct dir_private_info *info;
int len;
* for all entres on the fname linked list. (Normally there is only
* one entry on the linked list, unless there are 62 bit hash collisions.)
*/
-static int call_filldir(struct file * filp, void * dirent,
+static int call_filldir(struct file *filp, void *dirent,
filldir_t filldir, struct fname *fname)
{
struct dir_private_info *info = filp->private_data;
loff_t curr_pos;
struct inode *inode = filp->f_path.dentry->d_inode;
- struct super_block * sb;
+ struct super_block *sb;
int error;
sb = inode->i_sb;
if (!fname) {
- printk("call_filldir: called with null fname?!?\n");
+ printk(KERN_ERR "EXT4-fs: call_filldir: called with "
+ "null fname?!?\n");
return 0;
}
curr_pos = hash2pos(fname->hash, fname->minor_hash);
get_dtype(sb, fname->file_type));
if (error) {
filp->f_pos = curr_pos;
- info->extra_fname = fname->next;
+ info->extra_fname = fname;
return error;
}
fname = fname->next;
return 0;
}
-static int ext4_dx_readdir(struct file * filp,
- void * dirent, filldir_t filldir)
+static int ext4_dx_readdir(struct file *filp,
+ void *dirent, filldir_t filldir)
{
struct dir_private_info *info = filp->private_data;
struct inode *inode = filp->f_path.dentry->d_inode;
int ret;
if (!info) {
- info = create_dir_info(filp->f_pos);
+ info = ext4_htree_create_dir_info(filp->f_pos);
if (!info)
return -ENOMEM;
filp->private_data = info;
* If there are any leftover names on the hash collision
* chain, return them first.
*/
- if (info->extra_fname &&
- call_filldir(filp, dirent, filldir, info->extra_fname))
- goto finished;
-
- if (!info->curr_node)
+ if (info->extra_fname) {
+ if (call_filldir(filp, dirent, filldir, info->extra_fname))
+ goto finished;
+ info->extra_fname = NULL;
+ goto next_node;
+ } else if (!info->curr_node)
info->curr_node = rb_first(&info->root);
while (1) {
info->curr_minor_hash = fname->minor_hash;
if (call_filldir(filp, dirent, filldir, fname))
break;
-
+ next_node:
info->curr_node = rb_next(info->curr_node);
- if (!info->curr_node) {
+ if (info->curr_node) {
+ fname = rb_entry(info->curr_node, struct fname,
+ rb_hash);
+ info->curr_hash = fname->hash;
+ info->curr_minor_hash = fname->minor_hash;
+ } else {
if (info->next_hash == ~0) {
filp->f_pos = EXT4_HTREE_EOF;
break;
return 0;
}
-static int ext4_release_dir (struct inode * inode, struct file * filp)
+static int ext4_release_dir(struct inode *inode, struct file *filp)
{
if (filp->private_data)
ext4_htree_free_dir_info(filp->private_data);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff