Re: [PATCH v16 06/11] mm: introduce memfd_secret system call to create "secret" memory areas
From: Mike Rapoport <rppt@kernel.org>
Date: 2021-02-04 11:37:33
Also in:
linux-api, linux-arch, linux-fsdevel, linux-kselftest, linux-mm, linux-riscv, lkml, nvdimm
On Wed, Feb 03, 2021 at 01:15:58PM +0100, Michal Hocko wrote:
On Thu 21-01-21 14:27:18, Mike Rapoport wrote:quoted
+static struct file *secretmem_file_create(unsigned long flags) +{ + struct file *file = ERR_PTR(-ENOMEM); + struct secretmem_ctx *ctx; + struct inode *inode; + + inode = alloc_anon_inode(secretmem_mnt->mnt_sb); + if (IS_ERR(inode)) + return ERR_CAST(inode); + + ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); + if (!ctx) + goto err_free_inode; + + file = alloc_file_pseudo(inode, secretmem_mnt, "secretmem", + O_RDWR, &secretmem_fops); + if (IS_ERR(file)) + goto err_free_ctx; + + mapping_set_unevictable(inode->i_mapping);Btw. you need also mapping_set_gfp_mask(mapping, GFP_HIGHUSER) because the default is GFP_HIGHUSER_MOVABLE and you do not support migration so no pages from movable zones should be allowed.
Ok. -- Sincerely yours, Mike. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel