From patchwork Fri Oct 6 22:35:27 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Williams X-Patchwork-Id: 9990617 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id E15F1603FA for ; Fri, 6 Oct 2017 22:41:56 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D1F7428E4A for ; Fri, 6 Oct 2017 22:41:56 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B675C28E45; Fri, 6 Oct 2017 22:41:56 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4DEC328E48 for ; Fri, 6 Oct 2017 22:41:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752095AbdJFWlx (ORCPT ); Fri, 6 Oct 2017 18:41:53 -0400 Received: from mga01.intel.com ([192.55.52.88]:16639 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751515AbdJFWlw (ORCPT ); Fri, 6 Oct 2017 18:41:52 -0400 Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga101.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 06 Oct 2017 15:41:52 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.42,486,1500966000"; d="scan'208";a="1179515910" Received: from dwillia2-desk3.jf.intel.com (HELO dwillia2-desk3.amr.corp.intel.com) ([10.54.39.125]) by orsmga001.jf.intel.com with ESMTP; 06 Oct 2017 15:41:51 -0700 Subject: [PATCH v7 02/12] fs, mm: pass fd to ->mmap_validate() From: Dan Williams To: linux-nvdimm@lists.01.org Cc: Jan Kara , "Darrick J. Wong" , linux-rdma@vger.kernel.org, linux-api@vger.kernel.org, Dave Chinner , Christoph Hellwig , linux-xfs@vger.kernel.org, linux-mm@kvack.org, Jeff Moyer , linux-fsdevel@vger.kernel.org, Andrew Morton , Ross Zwisler Date: Fri, 06 Oct 2017 15:35:27 -0700 Message-ID: <150732932763.22363.2605808989118835376.stgit@dwillia2-desk3.amr.corp.intel.com> In-Reply-To: <150732931273.22363.8436792888326501071.stgit@dwillia2-desk3.amr.corp.intel.com> References: <150732931273.22363.8436792888326501071.stgit@dwillia2-desk3.amr.corp.intel.com> User-Agent: StGit/0.17.1-9-g687f MIME-Version: 1.0 Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The MAP_DIRECT mechanism for mmap intends to use a file lease to prevent block map changes while the file is mapped. It requires the fd to setup an fasync_struct for signalling lease break events to the lease holder. Cc: Jan Kara Cc: Jeff Moyer Cc: Christoph Hellwig Cc: Dave Chinner Cc: "Darrick J. Wong" Cc: Ross Zwisler Cc: Andrew Morton Signed-off-by: Dan Williams --- arch/mips/kernel/vdso.c | 2 +- arch/tile/mm/elf.c | 2 +- arch/x86/mm/mpx.c | 3 ++- fs/aio.c | 2 +- include/linux/fs.h | 2 +- include/linux/mm.h | 9 +++++---- ipc/shm.c | 3 ++- mm/internal.h | 2 +- mm/mmap.c | 13 +++++++------ mm/nommu.c | 5 +++-- mm/util.c | 7 ++++--- 11 files changed, 28 insertions(+), 22 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/arch/mips/kernel/vdso.c b/arch/mips/kernel/vdso.c index cf10654477a9..ab26c7ac0316 100644 --- a/arch/mips/kernel/vdso.c +++ b/arch/mips/kernel/vdso.c @@ -110,7 +110,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp) base = mmap_region(NULL, STACK_TOP, PAGE_SIZE, VM_READ|VM_WRITE|VM_EXEC| VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC, - 0, NULL, 0); + 0, NULL, 0, -1); if (IS_ERR_VALUE(base)) { ret = base; goto out; diff --git a/arch/tile/mm/elf.c b/arch/tile/mm/elf.c index 5ffcbe76aef9..61a9588e141a 100644 --- a/arch/tile/mm/elf.c +++ b/arch/tile/mm/elf.c @@ -144,7 +144,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, addr = mmap_region(NULL, addr, INTRPT_SIZE, VM_READ|VM_EXEC| VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC, 0, - NULL, 0); + NULL, 0, -1); if (addr > (unsigned long) -PAGE_SIZE) retval = (int) addr; } diff --git a/arch/x86/mm/mpx.c b/arch/x86/mm/mpx.c index 9ceaa955d2ba..a8baa94a496b 100644 --- a/arch/x86/mm/mpx.c +++ b/arch/x86/mm/mpx.c @@ -52,7 +52,8 @@ static unsigned long mpx_mmap(unsigned long len) down_write(&mm->mmap_sem); addr = do_mmap(NULL, 0, len, PROT_READ | PROT_WRITE, - MAP_ANONYMOUS | MAP_PRIVATE, VM_MPX, 0, &populate, NULL); + MAP_ANONYMOUS | MAP_PRIVATE, VM_MPX, 0, &populate, + NULL, -1); up_write(&mm->mmap_sem); if (populate) mm_populate(addr, populate); diff --git a/fs/aio.c b/fs/aio.c index 5a2487217072..d10ca6db2ee6 100644 --- a/fs/aio.c +++ b/fs/aio.c @@ -519,7 +519,7 @@ static int aio_setup_ring(struct kioctx *ctx, unsigned int nr_events) ctx->mmap_base = do_mmap_pgoff(ctx->aio_ring_file, 0, ctx->mmap_size, PROT_READ | PROT_WRITE, - MAP_SHARED, 0, &unused, NULL); + MAP_SHARED, 0, &unused, NULL, -1); up_write(&mm->mmap_sem); if (IS_ERR((void *)ctx->mmap_base)) { ctx->mmap_size = 0; diff --git a/include/linux/fs.h b/include/linux/fs.h index 51538958f7f5..c2b9bf3dc4e9 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1702,7 +1702,7 @@ struct file_operations { long (*compat_ioctl) (struct file *, unsigned int, unsigned long); int (*mmap) (struct file *, struct vm_area_struct *); int (*mmap_validate) (struct file *, struct vm_area_struct *, - unsigned long); + unsigned long, int); int (*open) (struct inode *, struct file *); int (*flush) (struct file *, fl_owner_t id); int (*release) (struct inode *, struct file *); diff --git a/include/linux/mm.h b/include/linux/mm.h index 5c4c98e4adc9..0afa19feb755 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -2133,11 +2133,11 @@ extern unsigned long get_unmapped_area(struct file *, unsigned long, unsigned lo extern unsigned long mmap_region(struct file *file, unsigned long addr, unsigned long len, vm_flags_t vm_flags, unsigned long pgoff, - struct list_head *uf, unsigned long map_flags); + struct list_head *uf, unsigned long map_flags, int fd); extern unsigned long do_mmap(struct file *file, unsigned long addr, unsigned long len, unsigned long prot, unsigned long flags, vm_flags_t vm_flags, unsigned long pgoff, unsigned long *populate, - struct list_head *uf); + struct list_head *uf, int fd); extern int do_munmap(struct mm_struct *, unsigned long, size_t, struct list_head *uf); @@ -2145,9 +2145,10 @@ static inline unsigned long do_mmap_pgoff(struct file *file, unsigned long addr, unsigned long len, unsigned long prot, unsigned long flags, unsigned long pgoff, unsigned long *populate, - struct list_head *uf) + struct list_head *uf, int fd) { - return do_mmap(file, addr, len, prot, flags, 0, pgoff, populate, uf); + return do_mmap(file, addr, len, prot, flags, 0, pgoff, populate, + uf, fd); } #ifdef CONFIG_MMU diff --git a/ipc/shm.c b/ipc/shm.c index 1e2b1692ba2c..585e05eef40a 100644 --- a/ipc/shm.c +++ b/ipc/shm.c @@ -1399,7 +1399,8 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg, goto invalid; } - addr = do_mmap_pgoff(file, addr, size, prot, flags, 0, &populate, NULL); + addr = do_mmap_pgoff(file, addr, size, prot, flags, 0, &populate, + NULL, -1); *raddr = addr; err = 0; if (IS_ERR_VALUE(addr)) diff --git a/mm/internal.h b/mm/internal.h index 1df011f62480..70ed7b06dd85 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -466,7 +466,7 @@ extern u32 hwpoison_filter_enable; extern unsigned long __must_check vm_mmap_pgoff(struct file *, unsigned long, unsigned long, unsigned long, - unsigned long, unsigned long); + unsigned long, unsigned long, int); extern void set_pageblock_order(void); unsigned long reclaim_clean_pages_from_list(struct zone *zone, diff --git a/mm/mmap.c b/mm/mmap.c index a1bcaa9eff42..c2cb6334a7a9 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -1322,7 +1322,7 @@ unsigned long do_mmap(struct file *file, unsigned long addr, unsigned long len, unsigned long prot, unsigned long flags, vm_flags_t vm_flags, unsigned long pgoff, unsigned long *populate, - struct list_head *uf) + struct list_head *uf, int fd) { struct mm_struct *mm = current->mm; int pkey = 0; @@ -1477,7 +1477,7 @@ unsigned long do_mmap(struct file *file, unsigned long addr, vm_flags |= VM_NORESERVE; } - addr = mmap_region(file, addr, len, vm_flags, pgoff, uf, flags); + addr = mmap_region(file, addr, len, vm_flags, pgoff, uf, flags, fd); if (!IS_ERR_VALUE(addr) && ((vm_flags & VM_LOCKED) || (flags & (MAP_POPULATE | MAP_NONBLOCK)) == MAP_POPULATE)) @@ -1527,7 +1527,7 @@ SYSCALL_DEFINE6(mmap_pgoff, unsigned long, addr, unsigned long, len, flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); - retval = vm_mmap_pgoff(file, addr, len, prot, flags, pgoff); + retval = vm_mmap_pgoff(file, addr, len, prot, flags, pgoff, fd); out_fput: if (file) fput(file); @@ -1614,7 +1614,7 @@ static inline int accountable_mapping(struct file *file, vm_flags_t vm_flags) unsigned long mmap_region(struct file *file, unsigned long addr, unsigned long len, vm_flags_t vm_flags, unsigned long pgoff, - struct list_head *uf, unsigned long map_flags) + struct list_head *uf, unsigned long map_flags, int fd) { struct mm_struct *mm = current->mm; struct vm_area_struct *vma, *prev; @@ -1700,7 +1700,8 @@ unsigned long mmap_region(struct file *file, unsigned long addr, */ vma->vm_file = get_file(file); if ((map_flags & MAP_TYPE) == MAP_SHARED_VALIDATE) - error = file->f_op->mmap_validate(file, vma, map_flags); + error = file->f_op->mmap_validate(file, vma, + map_flags, fd); else error = call_mmap(file, vma); if (error) @@ -2842,7 +2843,7 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size, file = get_file(vma->vm_file); ret = do_mmap_pgoff(vma->vm_file, start, size, - prot, flags, pgoff, &populate, NULL); + prot, flags, pgoff, &populate, NULL, -1); fput(file); out: up_write(&mm->mmap_sem); diff --git a/mm/nommu.c b/mm/nommu.c index 17c00d93de2e..952d205d3b66 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -1206,7 +1206,8 @@ unsigned long do_mmap(struct file *file, vm_flags_t vm_flags, unsigned long pgoff, unsigned long *populate, - struct list_head *uf) + struct list_head *uf, + int fd) { struct vm_area_struct *vma; struct vm_region *region; @@ -1439,7 +1440,7 @@ SYSCALL_DEFINE6(mmap_pgoff, unsigned long, addr, unsigned long, len, flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); - retval = vm_mmap_pgoff(file, addr, len, prot, flags, pgoff); + retval = vm_mmap_pgoff(file, addr, len, prot, flags, pgoff, fd); if (file) fput(file); diff --git a/mm/util.c b/mm/util.c index 34e57fae959d..dcf48d929185 100644 --- a/mm/util.c +++ b/mm/util.c @@ -319,7 +319,7 @@ EXPORT_SYMBOL_GPL(get_user_pages_fast); unsigned long vm_mmap_pgoff(struct file *file, unsigned long addr, unsigned long len, unsigned long prot, - unsigned long flag, unsigned long pgoff) + unsigned long flag, unsigned long pgoff, int fd) { unsigned long ret; struct mm_struct *mm = current->mm; @@ -331,7 +331,7 @@ unsigned long vm_mmap_pgoff(struct file *file, unsigned long addr, if (down_write_killable(&mm->mmap_sem)) return -EINTR; ret = do_mmap_pgoff(file, addr, len, prot, flag, pgoff, - &populate, &uf); + &populate, &uf, fd); up_write(&mm->mmap_sem); userfaultfd_unmap_complete(mm, &uf); if (populate) @@ -349,7 +349,8 @@ unsigned long vm_mmap(struct file *file, unsigned long addr, if (unlikely(offset_in_page(offset))) return -EINVAL; - return vm_mmap_pgoff(file, addr, len, prot, flag, offset >> PAGE_SHIFT); + return vm_mmap_pgoff(file, addr, len, prot, flag, + offset >> PAGE_SHIFT, -1); } EXPORT_SYMBOL(vm_mmap);