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vfs: introduce file_modified() helper

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The combination of file_remove_privs() and file_update_mtime() is
quite common in filesystem ->write_iter() methods.

Modelled after the helper file_accessed(), introduce file_modified()
and use it from generic_remap_file_range_prep().

Note that the order of calling file_remove_privs() before
file_update_mtime() in the helper was matched to the more common order by
filesystems and not the current order in generic_remap_file_range_prep().

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Amir Goldstein
2019-06-05 08:04:49 -07:00
committed by Darrick J. Wong
parent 96e6e8f4a6
commit e38f7f53c3
3 changed files with 25 additions and 18 deletions
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2
include/linux/fs.h
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@@ -2177,6 +2177,8 @@ static inline void file_accessed(struct file *file)
touch_atime(&file->f_path);
}
extern int file_modified(struct file *file);
int sync_inode(struct inode *inode, struct writeback_control *wbc);
int sync_inode_metadata(struct inode *inode, int wait);