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f2fs: support fiemap for inline_data

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There is a FIEMAP_EXTENT_INLINE_DATA, pointed out by Marc.

Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2015-10-15 11:34:49 -07:00
parent 1d373a0ef7
commit 67f8cf3cee
3 changed files with 44 additions and 0 deletions
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6
fs/f2fs/data.c
View File

@ -771,6 +771,12 @@ int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
if (ret)
return ret;
if (f2fs_has_inline_data(inode)) {
ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len);
if (ret != -EAGAIN)
return ret;
}
mutex_lock(&inode->i_mutex);
if (len >= isize) {

2
fs/f2fs/f2fs.h
View File

@ -2054,6 +2054,8 @@ void f2fs_delete_inline_entry(struct f2fs_dir_entry *, struct page *,
bool f2fs_empty_inline_dir(struct inode *);
int f2fs_read_inline_dir(struct file *, struct dir_context *,
struct f2fs_str *);
int f2fs_inline_data_fiemap(struct inode *,
struct fiemap_extent_info *, __u64, __u64);
/*
* shrinker.c

36
fs/f2fs/inline.c
View File

@ -12,6 +12,7 @@
#include <linux/f2fs_fs.h>
#include "f2fs.h"
#include "node.h"
bool f2fs_may_inline_data(struct inode *inode)
{
@ -570,3 +571,38 @@ int f2fs_read_inline_dir(struct file *file, struct dir_context *ctx,
f2fs_put_page(ipage, 1);
return 0;
}
int f2fs_inline_data_fiemap(struct inode *inode,
struct fiemap_extent_info *fieinfo, __u64 start, __u64 len)
{
__u64 byteaddr, ilen;
__u32 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED |
FIEMAP_EXTENT_LAST;
struct node_info ni;
struct page *ipage;
int err = 0;
ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
if (IS_ERR(ipage))
return PTR_ERR(ipage);
if (!f2fs_has_inline_data(inode)) {
err = -EAGAIN;
goto out;
}
ilen = min_t(size_t, MAX_INLINE_DATA, i_size_read(inode));
if (start >= ilen)
goto out;
if (start + len < ilen)
ilen = start + len;
ilen -= start;
get_node_info(F2FS_I_SB(inode), inode->i_ino, &ni);
byteaddr = (__u64)ni.blk_addr << inode->i_sb->s_blocksize_bits;
byteaddr += (char *)inline_data_addr(ipage) - (char *)F2FS_INODE(ipage);
err = fiemap_fill_next_extent(fieinfo, start, byteaddr, ilen, flags);
out:
f2fs_put_page(ipage, 1);
return err;
}