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netfs: Make netfs_io_request::subreq_counter an atomic_t

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Make the netfs_io_request::subreq_counter, used to generate values for
netfs_io_subrequest::debug_index, into an atomic_t so that it can be called
from the retry thread at the same time as the app thread issuing writes.

Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
This commit is contained in:
David Howells 2024-03-18 17:15:57 +00:00
parent ae678317b9
commit 93bf1cc009
2 changed files with 2 additions and 2 deletions
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2
fs/netfs/output.c
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@ -37,7 +37,7 @@ struct netfs_io_subrequest *netfs_create_write_request(struct netfs_io_request *
subreq->source = dest;
subreq->start = start;
subreq->len = len;
subreq->debug_index = wreq->subreq_counter++;
subreq->debug_index = atomic_inc_return(&wreq->subreq_counter);
switch (subreq->source) {
case NETFS_UPLOAD_TO_SERVER:

2
include/linux/netfs.h
View file

@ -202,7 +202,7 @@ struct netfs_io_request {
unsigned int debug_id;
unsigned int rsize; /* Maximum read size (0 for none) */
unsigned int wsize; /* Maximum write size (0 for none) */
unsigned int subreq_counter; /* Next subreq->debug_index */
atomic_t subreq_counter; /* Next subreq->debug_index */
atomic_t nr_outstanding; /* Number of ops in progress */
atomic_t nr_copy_ops; /* Number of copy-to-cache ops in progress */
size_t submitted; /* Amount submitted for I/O so far */