diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/libfs.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/fs/libfs.c b/fs/libfs.c index 80046ddf506..ddfa89948c3 100644 --- a/fs/libfs.c +++ b/fs/libfs.c @@ -9,6 +9,8 @@ #include <linux/vfs.h> #include <linux/mutex.h> #include <linux/exportfs.h> +#include <linux/writeback.h> +#include <linux/buffer_head.h> #include <asm/uaccess.h> @@ -807,6 +809,29 @@ struct dentry *generic_fh_to_parent(struct super_block *sb, struct fid *fid, } EXPORT_SYMBOL_GPL(generic_fh_to_parent); +int simple_fsync(struct file *file, struct dentry *dentry, int datasync) +{ + struct writeback_control wbc = { + .sync_mode = WB_SYNC_ALL, + .nr_to_write = 0, /* metadata-only; caller takes care of data */ + }; + struct inode *inode = dentry->d_inode; + int err; + int ret; + + ret = sync_mapping_buffers(inode->i_mapping); + if (!(inode->i_state & I_DIRTY)) + return ret; + if (datasync && !(inode->i_state & I_DIRTY_DATASYNC)) + return ret; + + err = sync_inode(inode, &wbc); + if (ret == 0) + ret = err; + return ret; +} +EXPORT_SYMBOL(simple_fsync); + EXPORT_SYMBOL(dcache_dir_close); EXPORT_SYMBOL(dcache_dir_lseek); EXPORT_SYMBOL(dcache_dir_open); |