A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-29 11:11:45 -04:00
Code Issues Projects Releases Packages Wiki Activity

fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers

Browse source 
Btrfs needs to be able to control how filemap_write_and_wait_range() is called
in fsync to make it less of a painful operation, so push down taking i_mutex and
the calling of filemap_write_and_wait() down into the ->fsync() handlers.  Some
file systems can drop taking the i_mutex altogether it seems, like ext3 and
ocfs2.  For correctness sake I just pushed everything down in all cases to make
sure that we keep the current behavior the same for everybody, and then each
individual fs maintainer can make up their mind about what to do from there.
Thanks,

Acked-by: Jan Kara <[email protected]>
Signed-off-by: Josef Bacik <[email protected]>
Signed-off-by: Al Viro <[email protected]>
This commit is contained in:
Josef Bacik 2011-07-16 20:44:56 -04:00 • committed by Al Viro
commit 02c24a8218
71 changed files with 462 additions and 164 deletions
Download patch file Download diff file Expand all files Collapse all files

12
fs/nilfs2/file.c
View file

@ -27,7 +27,7 @@
#include "nilfs.h"
#include "segment.h"
int nilfs_sync_file(struct file *file, int datasync)
int nilfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
{
/*
* Called from fsync() system call
@ -40,8 +40,15 @@ int nilfs_sync_file(struct file *file, int datasync)
struct inode *inode = file->f_mapping->host;
int err;
if (!nilfs_inode_dirty(inode))
err = filemap_write_and_wait_range(inode->i_mapping, start, end);
if (err)
return err;
mutex_lock(&inode->i_mutex);
if (!nilfs_inode_dirty(inode)) {
mutex_unlock(&inode->i_mutex);
return 0;
}
if (datasync)
err = nilfs_construct_dsync_segment(inode->i_sb, inode, 0,
@ -49,6 +56,7 @@ int nilfs_sync_file(struct file *file, int datasync)
else
err = nilfs_construct_segment(inode->i_sb);
mutex_unlock(&inode->i_mutex);
return err;
}

2
fs/nilfs2/nilfs.h
View file

@ -235,7 +235,7 @@ extern void nilfs_set_link(struct inode *, struct nilfs_dir_entry *,
struct page *, struct inode *);
/* file.c */
extern int nilfs_sync_file(struct file *, int);
extern int nilfs_sync_file(struct file *, loff_t, loff_t, int);
/* ioctl.c */
long nilfs_ioctl(struct file *, unsigned int, unsigned long);