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vfs: export vfs_dedupe_file_range_one() to modules 

This is needed by the stacked dedupe implementation in overlayfs.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
This commit is contained in:
Miklos Szeredi 2018-07-18 15:44:40 +02:00
parent 9df6702ad0
commit f182536684
2 changed files with 7 additions and 3 deletions
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6
fs/read_write.c
View File

@ -1964,9 +1964,8 @@ out_error:
} }
EXPORT_SYMBOL(vfs_dedupe_file_range_compare); EXPORT_SYMBOL(vfs_dedupe_file_range_compare);
static int vfs_dedupe_file_range_one(struct file *src_file, loff_t src_pos, int vfs_dedupe_file_range_one(struct file *src_file, loff_t src_pos,
struct file *dst_file, loff_t dst_pos, struct file *dst_file, loff_t dst_pos, u64 len)
u64 len)
{ {
s64 ret; s64 ret;
@ -2001,6 +2000,7 @@ out_drop_write:
return ret; return ret;
} }
EXPORT_SYMBOL(vfs_dedupe_file_range_one);
int vfs_dedupe_file_range(struct file *file, struct file_dedupe_range *same) int vfs_dedupe_file_range(struct file *file, struct file_dedupe_range *same)
{ {

4
include/linux/fs.h
View File

@ -1829,6 +1829,10 @@ extern int vfs_dedupe_file_range_compare(struct inode *src, loff_t srcoff,
loff_t len, bool *is_same); loff_t len, bool *is_same);
extern int vfs_dedupe_file_range(struct file *file, extern int vfs_dedupe_file_range(struct file *file,
struct file_dedupe_range *same); struct file_dedupe_range *same);
extern int vfs_dedupe_file_range_one(struct file *src_file, loff_t src_pos,
struct file *dst_file, loff_t dst_pos,
u64 len);
struct super_operations { struct super_operations {
struct inode *(*alloc_inode)(struct super_block *sb); struct inode *(*alloc_inode)(struct super_block *sb);