From 82e8885bd7633a36ee9050e6d7f348a4155eed5f Mon Sep 17 00:00:00 2001 From: Shyam Prasad N Date: Sat, 31 Jan 2026 14:03:04 +0530 Subject: [PATCH] netfs: when subreq is marked for retry, do not check if it faced an error The *_subreq_terminated functions today only process the NEED_RETRY flag when the subreq was successful or failed with EAGAIN error. However, there could be other retriable errors for network filesystems. Avoid this by processing the NEED_RETRY irrespective of the error code faced by the subreq. If it was specifically marked for retry, the error code must not matter. Acked-by: David Howells Signed-off-by: Shyam Prasad N Signed-off-by: Steve French --- fs/netfs/read_collect.c | 10 ++++++++++ fs/netfs/read_retry.c | 4 ++-- fs/netfs/write_collect.c | 8 ++++---- fs/netfs/write_issue.c | 1 + 4 files changed, 17 insertions(+), 6 deletions(-) diff --git a/fs/netfs/read_collect.c b/fs/netfs/read_collect.c index 7a0ffa675fb17..137f0e28a44c5 100644 --- a/fs/netfs/read_collect.c +++ b/fs/netfs/read_collect.c @@ -546,6 +546,15 @@ void netfs_read_subreq_terminated(struct netfs_io_subrequest *subreq) } } + /* If need retry is set, error should not matter unless we hit too many + * retries. Pause the generation of new subreqs + */ + if (test_bit(NETFS_SREQ_NEED_RETRY, &subreq->flags)) { + trace_netfs_rreq(rreq, netfs_rreq_trace_set_pause); + set_bit(NETFS_RREQ_PAUSE, &rreq->flags); + goto skip_error_checks; + } + if (unlikely(subreq->error < 0)) { trace_netfs_failure(rreq, subreq, subreq->error, netfs_fail_read); if (subreq->source == NETFS_READ_FROM_CACHE) { @@ -559,6 +568,7 @@ void netfs_read_subreq_terminated(struct netfs_io_subrequest *subreq) set_bit(NETFS_RREQ_PAUSE, &rreq->flags); } +skip_error_checks: trace_netfs_sreq(subreq, netfs_sreq_trace_terminated); netfs_subreq_clear_in_progress(subreq); netfs_put_subrequest(subreq, netfs_sreq_trace_put_terminated); diff --git a/fs/netfs/read_retry.c b/fs/netfs/read_retry.c index b99e84a8170af..7793ba5e3e8fc 100644 --- a/fs/netfs/read_retry.c +++ b/fs/netfs/read_retry.c @@ -12,6 +12,7 @@ static void netfs_reissue_read(struct netfs_io_request *rreq, struct netfs_io_subrequest *subreq) { + subreq->error = 0; __clear_bit(NETFS_SREQ_MADE_PROGRESS, &subreq->flags); __set_bit(NETFS_SREQ_IN_PROGRESS, &subreq->flags); netfs_stat(&netfs_n_rh_retry_read_subreq); @@ -242,8 +243,7 @@ abandon_after: subreq = list_next_entry(subreq, rreq_link); abandon: list_for_each_entry_from(subreq, &stream->subrequests, rreq_link) { - if (!subreq->error && - !test_bit(NETFS_SREQ_FAILED, &subreq->flags) && + if (!test_bit(NETFS_SREQ_FAILED, &subreq->flags) && !test_bit(NETFS_SREQ_NEED_RETRY, &subreq->flags)) continue; subreq->error = -ENOMEM; diff --git a/fs/netfs/write_collect.c b/fs/netfs/write_collect.c index cbf3d9194c7bf..61eab34ea67ef 100644 --- a/fs/netfs/write_collect.c +++ b/fs/netfs/write_collect.c @@ -492,11 +492,11 @@ void netfs_write_subrequest_terminated(void *_op, ssize_t transferred_or_error) if (IS_ERR_VALUE(transferred_or_error)) { subreq->error = transferred_or_error; - if (subreq->error == -EAGAIN) - set_bit(NETFS_SREQ_NEED_RETRY, &subreq->flags); - else + /* if need retry is set, error should not matter */ + if (!test_bit(NETFS_SREQ_NEED_RETRY, &subreq->flags)) { set_bit(NETFS_SREQ_FAILED, &subreq->flags); - trace_netfs_failure(wreq, subreq, transferred_or_error, netfs_fail_write); + trace_netfs_failure(wreq, subreq, transferred_or_error, netfs_fail_write); + } switch (subreq->source) { case NETFS_WRITE_TO_CACHE: diff --git a/fs/netfs/write_issue.c b/fs/netfs/write_issue.c index dd8743bc8d7fe..34894da5a23ec 100644 --- a/fs/netfs/write_issue.c +++ b/fs/netfs/write_issue.c @@ -250,6 +250,7 @@ void netfs_reissue_write(struct netfs_io_stream *stream, iov_iter_truncate(&subreq->io_iter, size); subreq->retry_count++; + subreq->error = 0; __clear_bit(NETFS_SREQ_MADE_PROGRESS, &subreq->flags); __set_bit(NETFS_SREQ_IN_PROGRESS, &subreq->flags); netfs_stat(&netfs_n_wh_retry_write_subreq); -- 2.47.3