diff options
| author | Jakub Kicinski <kuba@kernel.org> | 2023-11-26 15:07:29 -0800 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2023-11-28 15:48:39 +0100 |
| commit | f17c69649c698e4df3cfe0010b7bbf142dec3e40 (patch) | |
| tree | b6d39f97735510c1fdb92ea0afc5bb5e9cf57512 /net/core/page_pool_user.c | |
| parent | 23cfaf67ba5d2f013d2576b8a9173c45a4a7f895 (diff) | |
net: page_pool: id the page pools
To give ourselves the flexibility of creating netlink commands
and ability to refer to page pool instances in uAPIs create
IDs for page pools.
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Acked-by: Jesper Dangaard Brouer <hawk@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'net/core/page_pool_user.c')
| -rw-r--r-- | net/core/page_pool_user.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/net/core/page_pool_user.c b/net/core/page_pool_user.c new file mode 100644 index 000000000000..630d1eeecf2a --- /dev/null +++ b/net/core/page_pool_user.c @@ -0,0 +1,36 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include <linux/mutex.h> +#include <linux/xarray.h> +#include <net/page_pool/types.h> + +#include "page_pool_priv.h" + +static DEFINE_XARRAY_FLAGS(page_pools, XA_FLAGS_ALLOC1); +static DEFINE_MUTEX(page_pools_lock); + +int page_pool_list(struct page_pool *pool) +{ + static u32 id_alloc_next; + int err; + + mutex_lock(&page_pools_lock); + err = xa_alloc_cyclic(&page_pools, &pool->user.id, pool, xa_limit_32b, + &id_alloc_next, GFP_KERNEL); + if (err < 0) + goto err_unlock; + + mutex_unlock(&page_pools_lock); + return 0; + +err_unlock: + mutex_unlock(&page_pools_lock); + return err; +} + +void page_pool_unlist(struct page_pool *pool) +{ + mutex_lock(&page_pools_lock); + xa_erase(&page_pools, pool->user.id); + mutex_unlock(&page_pools_lock); +} |