From: Bernd Schubert <bschubert@ddn.com>
To: linux-fsdevel@vger.kernel.org
Cc: Dharmendra Singh <dsingh@ddn.com>,
Bernd Schubert <bschubert@ddn.com>,
Andrew Morton <akpm@linux-foundation.org>,
Uladzislau Rezki <urezki@gmail.com>,
Christoph Hellwig <hch@infradead.org>,
linux-mm@kvack.org, Miklos Szeredi <miklos@szeredi.hu>,
Amir Goldstein <amir73il@gmail.com>,
fuse-devel@lists.sourceforge.net
Subject: [PATCH 04/13] Add a vmalloc_node_user function
Date: Tue, 21 Mar 2023 02:10:38 +0100 [thread overview]
Message-ID: <20230321011047.3425786-5-bschubert@ddn.com> (raw)
In-Reply-To: <20230321011047.3425786-1-bschubert@ddn.com>
This is to have a numa aware vmalloc function for memory exposed to
userspace. Fuse uring will allocate queue memory using this
new function.
Signed-off-by: Bernd Schubert <bschubert@ddn.com>
cc: Andrew Morton <akpm@linux-foundation.org>
cc: Uladzislau Rezki <urezki@gmail.com>
cc: Christoph Hellwig <hch@infradead.org>
cc: linux-mm@kvack.org
cc: Miklos Szeredi <miklos@szeredi.hu>
cc: linux-fsdevel@vger.kernel.org
cc: Amir Goldstein <amir73il@gmail.com>
cc: fuse-devel@lists.sourceforge.net
---
include/linux/vmalloc.h | 1 +
mm/nommu.c | 6 ++++++
mm/vmalloc.c | 41 +++++++++++++++++++++++++++++++++++++----
3 files changed, 44 insertions(+), 4 deletions(-)
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index 096d48aa3437..e4e6f8f220b9 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -142,6 +142,7 @@ static inline unsigned long vmalloc_nr_pages(void) { return 0; }
extern void *vmalloc(unsigned long size) __alloc_size(1);
extern void *vzalloc(unsigned long size) __alloc_size(1);
extern void *vmalloc_user(unsigned long size) __alloc_size(1);
+extern void *vmalloc_node_user(unsigned long size, int node) __alloc_size(1);
extern void *vmalloc_node(unsigned long size, int node) __alloc_size(1);
extern void *vzalloc_node(unsigned long size, int node) __alloc_size(1);
extern void *vmalloc_32(unsigned long size) __alloc_size(1);
diff --git a/mm/nommu.c b/mm/nommu.c
index 5b83938ecb67..a7710c90447a 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -186,6 +186,12 @@ void *vmalloc_user(unsigned long size)
}
EXPORT_SYMBOL(vmalloc_user);
+void *vmalloc_node_user(unsigned long size, int node)
+{
+ return __vmalloc_user_flags(size, GFP_KERNEL | __GFP_ZERO);
+}
+EXPORT_SYMBOL(vmalloc_node_user);
+
struct page *vmalloc_to_page(const void *addr)
{
return virt_to_page(addr);
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index ca71de7c9d77..9ad98e6c5e59 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -3367,6 +3367,25 @@ void *vzalloc(unsigned long size)
}
EXPORT_SYMBOL(vzalloc);
+/**
+ * _vmalloc_node_user - allocate zeroed virtually contiguous memory for userspace
+ * on the given numa node
+ * @size: allocation size
+ * @node: numa node
+ *
+ * The resulting memory area is zeroed so it can be mapped to userspace
+ * without leaking data.
+ *
+ * Return: pointer to the allocated memory or %NULL on error
+ */
+static void *_vmalloc_node_user(unsigned long size, int node)
+{
+ return __vmalloc_node_range(size, SHMLBA, VMALLOC_START, VMALLOC_END,
+ GFP_KERNEL | __GFP_ZERO, PAGE_KERNEL,
+ VM_USERMAP, node,
+ __builtin_return_address(0));
+}
+
/**
* vmalloc_user - allocate zeroed virtually contiguous memory for userspace
* @size: allocation size
@@ -3378,13 +3397,27 @@ EXPORT_SYMBOL(vzalloc);
*/
void *vmalloc_user(unsigned long size)
{
- return __vmalloc_node_range(size, SHMLBA, VMALLOC_START, VMALLOC_END,
- GFP_KERNEL | __GFP_ZERO, PAGE_KERNEL,
- VM_USERMAP, NUMA_NO_NODE,
- __builtin_return_address(0));
+ return _vmalloc_node_user(size, NUMA_NO_NODE);
}
EXPORT_SYMBOL(vmalloc_user);
+/**
+ * vmalloc_user - allocate zeroed virtually contiguous memory for userspace on
+ * a numa node
+ * @size: allocation size
+ * @node: numa node
+ *
+ * The resulting memory area is zeroed so it can be mapped to userspace
+ * without leaking data.
+ *
+ * Return: pointer to the allocated memory or %NULL on error
+ */
+void *vmalloc_node_user(unsigned long size, int node)
+{
+ return _vmalloc_node_user(size, node);
+}
+EXPORT_SYMBOL(vmalloc_node_user);
+
/**
* vmalloc_node - allocate memory on a specific node
* @size: allocation size
--
2.37.2
next prev parent reply other threads:[~2023-03-21 1:13 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-21 1:10 [RFC PATCH 00/13] fuse uring communication Bernd Schubert
2023-03-21 1:10 ` [PATCH 01/13] fuse: Add uring data structures and documentation Bernd Schubert
2023-03-21 1:10 ` [PATCH 02/13] fuse: rename to fuse_dev_end_requests and make non-static Bernd Schubert
2023-03-21 1:10 ` [PATCH 03/13] fuse: Move fuse_get_dev to header file Bernd Schubert
2023-03-21 1:10 ` Bernd Schubert [this message]
2023-03-21 21:21 ` [PATCH 04/13] Add a vmalloc_node_user function Andrew Morton
2023-03-21 1:10 ` [PATCH 05/13] fuse: Add a uring config ioctl and ring destruction Bernd Schubert
2023-03-21 1:10 ` [PATCH 06/13] fuse: Add an interval ring stop worker/monitor Bernd Schubert
2023-03-23 10:27 ` Miklos Szeredi
2023-03-23 11:04 ` Bernd Schubert
2023-03-23 12:35 ` Miklos Szeredi
2023-03-23 13:18 ` Bernd Schubert
2023-03-23 20:51 ` Bernd Schubert
2023-03-27 13:22 ` Pavel Begunkov
2023-03-27 14:02 ` Bernd Schubert
2023-03-23 13:26 ` Ming Lei
2023-03-21 1:10 ` [PATCH 07/13] fuse: Add uring mmap method Bernd Schubert
2023-03-21 1:10 ` [PATCH 08/13] fuse: Move request bits Bernd Schubert
2023-03-21 1:10 ` [PATCH 09/13] fuse: Add wait stop ioctl support to the ring Bernd Schubert
2023-03-21 1:10 ` [PATCH 10/13] fuse: Handle SQEs - register commands Bernd Schubert
2023-03-21 1:10 ` [PATCH 11/13] fuse: Add support to copy from/to the ring buffer Bernd Schubert
2023-03-21 1:10 ` [PATCH 12/13] fuse: Add uring sqe commit and fetch support Bernd Schubert
2023-03-21 1:10 ` [PATCH 13/13] fuse: Allow to queue to the ring Bernd Schubert
2023-03-21 1:26 ` [RFC PATCH 00/13] fuse uring communication Bernd Schubert
2023-03-21 9:35 ` Amir Goldstein
2023-03-23 11:18 ` Bernd Schubert
2023-03-23 11:55 ` Amir Goldstein
2023-06-07 14:20 ` Miklos Szeredi
2023-06-08 21:31 ` Bernd Schubert
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