Due to the fact that fuse does not count the write IO of processes in the direct and writethrough write modes, user processes cannot track write_bytes through the “/proc/[pid]/io” path. For example, the system tool iotop cannot count the write operations of the corresponding process. Signed-off-by: Zhou Jifeng <zhoujifeng@xxxxxxxxxxxxxx> --- fs/fuse/file.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/fs/fuse/file.c b/fs/fuse/file.c index 1cdb6327511e..6051d2e2a021 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -19,6 +19,7 @@ #include <linux/uio.h> #include <linux/fs.h> #include <linux/filelock.h> +#include <linux/task_io_accounting_ops.h> static int fuse_send_open(struct fuse_mount *fm, u64 nodeid, unsigned int open_flags, int opcode, @@ -1305,6 +1306,7 @@ static ssize_t fuse_cache_write_iter(struct kiocb *iocb, struct iov_iter *from) ssize_t written = 0; struct inode *inode = mapping->host; ssize_t err; + ssize_t count; struct fuse_conn *fc = get_fuse_conn(inode); if (fc->writeback_cache) { @@ -1326,10 +1328,12 @@ static ssize_t fuse_cache_write_iter(struct kiocb *iocb, struct iov_iter *from) writethrough: inode_lock(inode); - err = generic_write_checks(iocb, from); - if (err <= 0) + count = generic_write_checks(iocb, from); + if (count <= 0) goto out; + task_io_account_write(count); + err = file_remove_privs(file); if (err) goto out; @@ -1600,6 +1604,7 @@ static ssize_t fuse_direct_write_iter(struct kiocb *iocb, struct iov_iter *from) res = generic_write_checks(iocb, from); if (res > 0) { + task_io_account_write(res); if (!is_sync_kiocb(iocb) && iocb->ki_flags & IOCB_DIRECT) { res = fuse_direct_IO(iocb, from); } else { -- 2.18.1