lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Wed, 15 Jan 2020 14:43:38 +0200 From: Leon Romanovsky <leon@...nel.org> To: Doug Ledford <dledford@...hat.com>, Jason Gunthorpe <jgg@...lanox.com>, "David S . Miller" <davem@...emloft.net>, Santosh Shilimkar <santosh.shilimkar@...cle.com> Cc: Leon Romanovsky <leonro@...lanox.com>, RDMA mailing list <linux-rdma@...r.kernel.org>, Hans Westgaard Ry <hans.westgaard.ry@...cle.com>, Moni Shoua <monis@...lanox.com>, linux-netdev <netdev@...r.kernel.org> Subject: [PATCH mlx5-next 08/10] net/rds: Detect need of On-Demand-Paging memory registration From: Hans Westgaard Ry <hans.westgaard.ry@...cle.com> Add code to check if memory intended for RDMA is FS-DAX-memory. RDS will fail with error code EOPNOTSUPP if FS-DAX-memory is detected. Signed-off-by: Hans Westgaard Ry <hans.westgaard.ry@...cle.com> Signed-off-by: Leon Romanovsky <leonro@...lanox.com> --- net/rds/rdma.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/net/rds/rdma.c b/net/rds/rdma.c index 916f5ec373d8..eb23c38ce2b3 100644 --- a/net/rds/rdma.c +++ b/net/rds/rdma.c @@ -156,11 +156,13 @@ void rds_rdma_drop_keys(struct rds_sock *rs) static int rds_pin_pages(unsigned long user_addr, unsigned int nr_pages, struct page **pages, int write) { + unsigned int gup_flags = FOLL_LONGTERM; int ret; - ret = get_user_pages_fast(user_addr, nr_pages, write ? FOLL_WRITE : 0, - pages); + if (write) + gup_flags |= FOLL_WRITE; + ret = get_user_pages_fast(user_addr, nr_pages, gup_flags, pages); if (ret >= 0 && ret < nr_pages) { while (ret--) put_page(pages[ret]); -- 2.20.1
Powered by blists - more mailing lists