The aim of .flush fop is to hint file-system that flushing its state or caches or any other important data to reliable storage would be desirable now. fuse_flush() passes this hint by sending FUSE_FLUSH request to userspace. However, dirty pages and pages under writeback may be not visible to userspace yet if we won't ensure it explicitly.
Signed-off-by: Maxim Patlasov <[email protected]> --- fs/fuse/file.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/fs/fuse/file.c b/fs/fuse/file.c index 642bd51..f23fc65 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -19,6 +19,7 @@ #include <linux/falloc.h> static const struct file_operations fuse_direct_io_file_operations; +static void fuse_sync_writes(struct inode *inode); static int fuse_send_open(struct fuse_conn *fc, u64 nodeid, struct file *file, int opcode, struct fuse_open_out *outargp) @@ -399,6 +400,14 @@ static int fuse_flush(struct file *file, fl_owner_t id) if (fc->no_flush) return 0; + err = filemap_write_and_wait(file->f_mapping); + if (err) + return err; + + mutex_lock(&inode->i_mutex); + fuse_sync_writes(inode); + mutex_unlock(&inode->i_mutex); + req = fuse_get_req_nofail_nopages(fc, file); memset(&inarg, 0, sizeof(inarg)); inarg.fh = ff->fh; _______________________________________________ Devel mailing list [email protected] https://lists.openvz.org/mailman/listinfo/devel
