Commit 5b04aa3a authored by Mark Fasheh's avatar Mark Fasheh
Browse files

[PATCH] Turn do_sync_file_range() into do_sync_mapping_range() 



do_sync_file_range() accepts a file * from which it takes an address_space to
sync.  Abstract out the bulk of the function into do_sync_mapping_range()
which takes the address_space directly.  This way callers who want to sync an
address_space directly can take advantage of the functionality provided.

do_sync_file_range() is preserved as a small wrapper around
do_sync_mapping_range().

Ocfs2 in particular would like to use this to initiate a sync of a specific
inode range during truncate, where a file * may not be available.

Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 60b11392

fs/sync.c

+3 −5
Original line number Diff line number Diff line
@@ -239,13 +239,11 @@ out: 
/*

 * `endbyte' is inclusive

 */

int do_sync_file_range(struct file *file, loff_t offset, loff_t endbyte,

			unsigned int flags)

int do_sync_mapping_range(struct address_space *mapping, loff_t offset,

			  loff_t endbyte, unsigned int flags)

{

	int ret;

	struct address_space *mapping;



	mapping = file->f_mapping;

	if (!mapping) {

		ret = -EINVAL;

		goto out;
@@ -275,4 +273,4 @@ int do_sync_file_range(struct file *file, loff_t offset, loff_t endbyte, 
out:

	return ret;

}

EXPORT_SYMBOL_GPL(do_sync_file_range);
 
EXPORT_SYMBOL_GPL(do_sync_mapping_range);

include/linux/fs.h

+7 −2
Original line number Diff line number Diff line
@@ -843,8 +843,13 @@ extern int fcntl_setlease(unsigned int fd, struct file *filp, long arg); 
extern int fcntl_getlease(struct file *filp);



/* fs/sync.c */

extern int do_sync_file_range(struct file *file, loff_t offset, loff_t endbyte,

			unsigned int flags);

extern int do_sync_mapping_range(struct address_space *mapping, loff_t offset,

			loff_t endbyte, unsigned int flags);

static inline int do_sync_file_range(struct file *file, loff_t offset,

			loff_t endbyte, unsigned int flags)

{

	return do_sync_mapping_range(file->f_mapping, offset, endbyte, flags);

}



/* fs/locks.c */

extern void locks_init_lock(struct file_lock *);

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