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smb: smbdirect: introduce smbdirect_socket_wait_for_credits()

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This is a copy of wait_for_credits() in the server, which
will be replaced by this soon.

This will allow us to share more common code between client
and server soon.

Cc: Steve French <smfrench@gmail.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: Long Li <longli@microsoft.com>
Cc: Namjae Jeon <linkinjeon@kernel.org>
Cc: linux-cifs@vger.kernel.org
Cc: samba-technical@lists.samba.org
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Stefan Metzmacher 2025-09-19 09:48:58 +02:00 committed by Steve French
parent dc01504c90
commit 0ad03ed97d
2 changed files with 36 additions and 0 deletions
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7
fs/smb/common/smbdirect/smbdirect_internal.h
View File

@ -32,6 +32,13 @@ static void __smbdirect_socket_schedule_cleanup(struct smbdirect_socket *sc,
__func__, __LINE__, __error, &__force_status); \
} while (0)
static int smbdirect_socket_wait_for_credits(struct smbdirect_socket *sc,
enum smbdirect_socket_status expected_status,
int unexpected_errno,
wait_queue_head_t *waitq,
atomic_t *total_credits,
int needed);
static void smbdirect_connection_idle_timer_work(struct work_struct *work);
#endif /* __FS_SMB_COMMON_SMBDIRECT_INTERNAL_H__ */

29
fs/smb/common/smbdirect/smbdirect_socket.c
View File

@ -250,3 +250,32 @@ static void smbdirect_socket_cleanup_work(struct work_struct *work)
*/
smbdirect_socket_wake_up_all(sc);
}
__maybe_unused /* this is temporary while this file is included in others */
static int smbdirect_socket_wait_for_credits(struct smbdirect_socket *sc,
enum smbdirect_socket_status expected_status,
int unexpected_errno,
wait_queue_head_t *waitq,
atomic_t *total_credits,
int needed)
{
int ret;
if (WARN_ON_ONCE(needed < 0))
return -EINVAL;
do {
if (atomic_sub_return(needed, total_credits) >= 0)
return 0;
atomic_add(needed, total_credits);
ret = wait_event_interruptible(*waitq,
atomic_read(total_credits) >= needed ||
sc->status != expected_status);
if (sc->status != expected_status)
return unexpected_errno;
else if (ret < 0)
return ret;
} while (true);
}