*/
#include "ext2.h"
+#include <linux/buffer_head.h>
#include <linux/pagemap.h>
+#include <linux/swap.h>
typedef struct ext2_dir_entry_2 ext2_dirent;
+static inline unsigned ext2_rec_len_from_disk(__le16 dlen)
+{
+ unsigned len = le16_to_cpu(dlen);
+
+ if (len == EXT2_MAX_REC_LEN)
+ return 1 << 16;
+ return len;
+}
+
+static inline __le16 ext2_rec_len_to_disk(unsigned len)
+{
+ if (len == (1 << 16))
+ return cpu_to_le16(EXT2_MAX_REC_LEN);
+ else
+ BUG_ON(len > (1 << 16));
+ return cpu_to_le16(len);
+}
+
/*
* ext2 uses block-sized chunks. Arguably, sector-sized ones would be
* more robust, but we have what we have
return last_byte;
}
-static int ext2_commit_chunk(struct page *page, unsigned from, unsigned to)
+static int ext2_commit_chunk(struct page *page, loff_t pos, unsigned len)
{
- struct inode *dir = page->mapping->host;
+ struct address_space *mapping = page->mapping;
+ struct inode *dir = mapping->host;
int err = 0;
+
dir->i_version++;
- page->mapping->a_ops->commit_write(NULL, page, from, to);
+ block_write_end(NULL, mapping, pos, len, len, page, NULL);
+
+ if (pos+len > dir->i_size) {
+ i_size_write(dir, pos+len);
+ mark_inode_dirty(dir);
+ }
+
if (IS_DIRSYNC(dir))
err = write_one_page(page, 1);
else
unlock_page(page);
+
return err;
}
}
for (offs = 0; offs <= limit - EXT2_DIR_REC_LEN(1); offs += rec_len) {
p = (ext2_dirent *)(kaddr + offs);
- rec_len = le16_to_cpu(p->rec_len);
+ rec_len = ext2_rec_len_from_disk(p->rec_len);
if (rec_len < EXT2_DIR_REC_LEN(1))
goto Eshort;
*/
static inline ext2_dirent *ext2_next_entry(ext2_dirent *p)
{
- return (ext2_dirent *)((char*)p + le16_to_cpu(p->rec_len));
+ return (ext2_dirent *)((char *)p +
+ ext2_rec_len_from_disk(p->rec_len));
}
static inline unsigned
struct page *page = ext2_get_page(inode, n);
if (IS_ERR(page)) {
- ext2_error(sb, __FUNCTION__,
+ ext2_error(sb, __func__,
"bad page in #%lu",
inode->i_ino);
filp->f_pos += PAGE_CACHE_SIZE - offset;
- return -EIO;
+ return PTR_ERR(page);
}
kaddr = page_address(page);
if (unlikely(need_revalidate)) {
limit = kaddr + ext2_last_byte(inode, n) - EXT2_DIR_REC_LEN(1);
for ( ;(char*)de <= limit; de = ext2_next_entry(de)) {
if (de->rec_len == 0) {
- ext2_error(sb, __FUNCTION__,
+ ext2_error(sb, __func__,
"zero-length directory entry");
ext2_put_page(page);
return -EIO;
return 0;
}
}
- filp->f_pos += le16_to_cpu(de->rec_len);
+ filp->f_pos += ext2_rec_len_from_disk(de->rec_len);
}
ext2_put_page(page);
}
kaddr += ext2_last_byte(dir, n) - reclen;
while ((char *) de <= kaddr) {
if (de->rec_len == 0) {
- ext2_error(dir->i_sb, __FUNCTION__,
+ ext2_error(dir->i_sb, __func__,
"zero-length directory entry");
ext2_put_page(page);
goto out;
n = 0;
/* next page is past the blocks we've got */
if (unlikely(n > (dir->i_blocks >> (PAGE_CACHE_SHIFT - 9)))) {
- ext2_error(dir->i_sb, __FUNCTION__,
+ ext2_error(dir->i_sb, __func__,
"dir %lu size %lld exceeds block count %llu",
dir->i_ino, dir->i_size,
(unsigned long long)dir->i_blocks);
void ext2_set_link(struct inode *dir, struct ext2_dir_entry_2 *de,
struct page *page, struct inode *inode)
{
- unsigned from = (char *) de - (char *) page_address(page);
- unsigned to = from + le16_to_cpu(de->rec_len);
+ loff_t pos = page_offset(page) +
+ (char *) de - (char *) page_address(page);
+ unsigned len = ext2_rec_len_from_disk(de->rec_len);
int err;
lock_page(page);
- err = page->mapping->a_ops->prepare_write(NULL, page, from, to);
+ err = __ext2_write_begin(NULL, page->mapping, pos, len,
+ AOP_FLAG_UNINTERRUPTIBLE, &page, NULL);
BUG_ON(err);
de->inode = cpu_to_le32(inode->i_ino);
- ext2_set_de_type (de, inode);
- err = ext2_commit_chunk(page, from, to);
+ ext2_set_de_type(de, inode);
+ err = ext2_commit_chunk(page, pos, len);
ext2_put_page(page);
dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
EXT2_I(dir)->i_flags &= ~EXT2_BTREE_FL;
unsigned long npages = dir_pages(dir);
unsigned long n;
char *kaddr;
- unsigned from, to;
+ loff_t pos;
int err;
/*
/* We hit i_size */
name_len = 0;
rec_len = chunk_size;
- de->rec_len = cpu_to_le16(chunk_size);
+ de->rec_len = ext2_rec_len_to_disk(chunk_size);
de->inode = 0;
goto got_it;
}
if (de->rec_len == 0) {
- ext2_error(dir->i_sb, __FUNCTION__,
+ ext2_error(dir->i_sb, __func__,
"zero-length directory entry");
err = -EIO;
goto out_unlock;
if (ext2_match (namelen, name, de))
goto out_unlock;
name_len = EXT2_DIR_REC_LEN(de->name_len);
- rec_len = le16_to_cpu(de->rec_len);
+ rec_len = ext2_rec_len_from_disk(de->rec_len);
if (!de->inode && rec_len >= reclen)
goto got_it;
if (rec_len >= name_len + reclen)
return -EINVAL;
got_it:
- from = (char*)de - (char*)page_address(page);
- to = from + rec_len;
- err = page->mapping->a_ops->prepare_write(NULL, page, from, to);
+ pos = page_offset(page) +
+ (char*)de - (char*)page_address(page);
+ err = __ext2_write_begin(NULL, page->mapping, pos, rec_len, 0,
+ &page, NULL);
if (err)
goto out_unlock;
if (de->inode) {
ext2_dirent *de1 = (ext2_dirent *) ((char *) de + name_len);
- de1->rec_len = cpu_to_le16(rec_len - name_len);
- de->rec_len = cpu_to_le16(name_len);
+ de1->rec_len = ext2_rec_len_to_disk(rec_len - name_len);
+ de->rec_len = ext2_rec_len_to_disk(name_len);
de = de1;
}
de->name_len = namelen;
- memcpy (de->name, name, namelen);
+ memcpy(de->name, name, namelen);
de->inode = cpu_to_le32(inode->i_ino);
ext2_set_de_type (de, inode);
- err = ext2_commit_chunk(page, from, to);
+ err = ext2_commit_chunk(page, pos, rec_len);
dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
EXT2_I(dir)->i_flags &= ~EXT2_BTREE_FL;
mark_inode_dirty(dir);
struct inode *inode = mapping->host;
char *kaddr = page_address(page);
unsigned from = ((char*)dir - kaddr) & ~(ext2_chunk_size(inode)-1);
- unsigned to = ((char*)dir - kaddr) + le16_to_cpu(dir->rec_len);
+ unsigned to = ((char *)dir - kaddr) +
+ ext2_rec_len_from_disk(dir->rec_len);
+ loff_t pos;
ext2_dirent * pde = NULL;
ext2_dirent * de = (ext2_dirent *) (kaddr + from);
int err;
while ((char*)de < (char*)dir) {
if (de->rec_len == 0) {
- ext2_error(inode->i_sb, __FUNCTION__,
+ ext2_error(inode->i_sb, __func__,
"zero-length directory entry");
err = -EIO;
goto out;
}
if (pde)
from = (char*)pde - (char*)page_address(page);
+ pos = page_offset(page) + from;
lock_page(page);
- err = mapping->a_ops->prepare_write(NULL, page, from, to);
+ err = __ext2_write_begin(NULL, page->mapping, pos, to - from, 0,
+ &page, NULL);
BUG_ON(err);
if (pde)
- pde->rec_len = cpu_to_le16(to-from);
+ pde->rec_len = ext2_rec_len_to_disk(to - from);
dir->inode = 0;
- err = ext2_commit_chunk(page, from, to);
+ err = ext2_commit_chunk(page, pos, to - from);
inode->i_ctime = inode->i_mtime = CURRENT_TIME_SEC;
EXT2_I(inode)->i_flags &= ~EXT2_BTREE_FL;
mark_inode_dirty(inode);
if (!page)
return -ENOMEM;
- err = mapping->a_ops->prepare_write(NULL, page, 0, chunk_size);
+
+ err = __ext2_write_begin(NULL, page->mapping, 0, chunk_size, 0,
+ &page, NULL);
if (err) {
unlock_page(page);
goto fail;
memset(kaddr, 0, chunk_size);
de = (struct ext2_dir_entry_2 *)kaddr;
de->name_len = 1;
- de->rec_len = cpu_to_le16(EXT2_DIR_REC_LEN(1));
+ de->rec_len = ext2_rec_len_to_disk(EXT2_DIR_REC_LEN(1));
memcpy (de->name, ".\0\0", 4);
de->inode = cpu_to_le32(inode->i_ino);
ext2_set_de_type (de, inode);
de = (struct ext2_dir_entry_2 *)(kaddr + EXT2_DIR_REC_LEN(1));
de->name_len = 2;
- de->rec_len = cpu_to_le16(chunk_size - EXT2_DIR_REC_LEN(1));
+ de->rec_len = ext2_rec_len_to_disk(chunk_size - EXT2_DIR_REC_LEN(1));
de->inode = cpu_to_le32(parent->i_ino);
memcpy (de->name, "..\0", 4);
ext2_set_de_type (de, inode);
while ((char *)de <= kaddr) {
if (de->rec_len == 0) {
- ext2_error(inode->i_sb, __FUNCTION__,
+ ext2_error(inode->i_sb, __func__,
"zero-length directory entry");
printk("kaddr=%p, de=%p\n", kaddr, de);
goto not_empty;
.llseek = generic_file_llseek,
.read = generic_read_dir,
.readdir = ext2_readdir,
- .ioctl = ext2_ioctl,
+ .unlocked_ioctl = ext2_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = ext2_compat_ioctl,
#endif
projects / linux-2.6-omap-h63xx.git / blobdiff