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[readdir] simple local unixlike: switch to ->iterate()

Browse source 
ext2, ufs, minix, sysv

Signed-off-by: Al Viro <[email protected]>
This commit is contained in:
Al Viro 2013-05-15 18:51:49 -04:00
commit 80886298c0
4 changed files with 59 additions and 75 deletions
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27
fs/ext2/dir.c
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@ -287,17 +287,17 @@ static inline void ext2_set_de_type(ext2_dirent *de, struct inode *inode)
}
static int
ext2_readdir (struct file * filp, void * dirent, filldir_t filldir)
ext2_readdir(struct file *file, struct dir_context *ctx)
{
loff_t pos = filp->f_pos;
struct inode *inode = file_inode(filp);
loff_t pos = ctx->pos;
struct inode *inode = file_inode(file);
struct super_block *sb = inode->i_sb;
unsigned int offset = pos & ~PAGE_CACHE_MASK;
unsigned long n = pos >> PAGE_CACHE_SHIFT;
unsigned long npages = dir_pages(inode);
unsigned chunk_mask = ~(ext2_chunk_size(inode)-1);
unsigned char *types = NULL;
int need_revalidate = filp->f_version != inode->i_version;
int need_revalidate = file->f_version != inode->i_version;
if (pos > inode->i_size - EXT2_DIR_REC_LEN(1))
return 0;
@ -314,16 +314,16 @@ ext2_readdir (struct file * filp, void * dirent, filldir_t filldir)
ext2_error(sb, __func__,
"bad page in #%lu",
inode->i_ino);
filp->f_pos += PAGE_CACHE_SIZE - offset;
ctx->pos += PAGE_CACHE_SIZE - offset;
return PTR_ERR(page);
}
kaddr = page_address(page);
if (unlikely(need_revalidate)) {
if (offset) {
offset = ext2_validate_entry(kaddr, offset, chunk_mask);
filp->f_pos = (n<<PAGE_CACHE_SHIFT) + offset;
ctx->pos = (n<<PAGE_CACHE_SHIFT) + offset;
}
filp->f_version = inode->i_version;
file->f_version = inode->i_version;
need_revalidate = 0;
}
de = (ext2_dirent *)(kaddr+offset);
@ -336,22 +336,19 @@ ext2_readdir (struct file * filp, void * dirent, filldir_t filldir)
return -EIO;
}
if (de->inode) {
int over;
unsigned char d_type = DT_UNKNOWN;
if (types && de->file_type < EXT2_FT_MAX)
d_type = types[de->file_type];
offset = (char *)de - kaddr;
over = filldir(dirent, de->name, de->name_len,
(n<<PAGE_CACHE_SHIFT) | offset,
le32_to_cpu(de->inode), d_type);
if (over) {
if (!dir_emit(ctx, de->name, de->name_len,
le32_to_cpu(de->inode),
d_type)) {
ext2_put_page(page);
return 0;
}
}
filp->f_pos += ext2_rec_len_from_disk(de->rec_len);
ctx->pos += ext2_rec_len_from_disk(de->rec_len);
}
ext2_put_page(page);
}
@ -724,7 +721,7 @@ not_empty:
const struct file_operations ext2_dir_operations = {
.llseek = generic_file_llseek,
.read = generic_read_dir,
.readdir = ext2_readdir,
.iterate = ext2_readdir,
.unlocked_ioctl = ext2_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = ext2_compat_ioctl,