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[PATCH] Turn do_sync_file_range() into do_sync_mapping_range()

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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: Mark Fasheh <mark.fasheh@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Mark Fasheh 2007-03-01 11:01:55 -08:00
parent 60b11392f1
commit 5b04aa3a64
2 changed files with 10 additions and 7 deletions
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8
fs/sync.c
View File

@ -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);

9
include/linux/fs.h
View File

@ -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 *);