From: Andreas Gruenbacher <andreas.gruenbacher@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org, linux-nfs@vger.kernel.org,
linux-api@vger.kernel.org, linux-cifs@vger.kernel.org,
linux-security-module@vger.kernel.org,
Andreas Gruenbacher <agruenba@redhat.com>
Subject: [RFC v6 35/40] sunrpc: Allow to demand-allocate pages to encode into
Date: Tue, 4 Aug 2015 13:53:33 +0200 [thread overview]
Message-ID: <1438689218-6921-36-git-send-email-agruenba@redhat.com> (raw)
In-Reply-To: <1438689218-6921-1-git-send-email-agruenba@redhat.com>
When encoding large, variable-length objects such as acls into xdr_bufs,
it is easier to allocate buffer pages on demand rather than precomputing
the required buffer size.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
net/sunrpc/xdr.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c
index 4439ac4..63c1c36 100644
--- a/net/sunrpc/xdr.c
+++ b/net/sunrpc/xdr.c
@@ -537,6 +537,15 @@ static __be32 *xdr_get_next_encode_buffer(struct xdr_stream *xdr,
*/
xdr->scratch.iov_base = xdr->p;
xdr->scratch.iov_len = frag1bytes;
+
+ if (!*xdr->page_ptr) {
+ struct page *page = alloc_page(GFP_NOFS);
+
+ if (!page)
+ return NULL;
+ *xdr->page_ptr = page;
+ }
+
p = page_address(*xdr->page_ptr);
/*
* Note this is where the next encode will start after we've
--
2.5.0
next prev parent reply other threads:[~2015-08-04 11:58 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-04 11:52 [RFC v6 00/40] Richacls Andreas Gruenbacher
2015-08-04 11:52 ` [RFC v6 01/40] vfs: Add IS_ACL() and IS_RICHACL() tests Andreas Gruenbacher
2015-08-28 20:34 ` J. Bruce Fields
2015-08-04 11:53 ` [RFC v6 02/40] vfs: Add MAY_CREATE_FILE and MAY_CREATE_DIR permission flags Andreas Gruenbacher
2015-09-02 18:53 ` J. Bruce Fields
2015-09-02 19:06 ` Andreas Gruenbacher
2015-09-02 19:20 ` J. Bruce Fields
2015-09-02 20:23 ` Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 03/40] vfs: Add MAY_DELETE_SELF and MAY_DELETE_CHILD " Andreas Gruenbacher
2015-08-28 20:44 ` J. Bruce Fields
2015-08-28 21:08 ` Andreas Gruenbacher
2015-08-28 21:36 ` Andy Lutomirski
2015-08-28 21:54 ` Andreas Grünbacher
2015-08-29 1:04 ` Andy Lutomirski
2015-08-28 21:57 ` J. Bruce Fields
2015-08-04 11:53 ` [RFC v6 04/40] vfs: Make the inode passed to inode_change_ok non-const Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 05/40] vfs: Add permission flags for setting file attributes Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 06/40] richacl: In-memory representation and helper functions Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 07/40] richacl: Permission mapping functions Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 08/40] richacl: Compute maximum file masks from an acl Andreas Gruenbacher
2015-09-02 19:54 ` J. Bruce Fields
2015-09-02 19:54 ` J. Bruce Fields
2015-09-02 20:38 ` Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 09/40] richacl: Update the file masks in chmod() Andreas Gruenbacher
2015-09-01 21:38 ` J. Bruce Fields
2015-09-02 6:08 ` Andreas Grünbacher
2015-08-04 11:53 ` [RFC v6 10/40] richacl: Permission check algorithm Andreas Gruenbacher
2015-08-28 21:49 ` J. Bruce Fields
2015-08-28 22:06 ` Andreas Grünbacher
2015-08-31 15:23 ` J. Bruce Fields
2015-08-04 11:53 ` [RFC v6 11/40] vfs: Cache base_acl objects in inodes Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 12/40] vfs: Cache richacl in struct inode Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 13/40] richacl: Check if an acl is equivalent to a file mode Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 14/40] richacl: Create-time inheritance Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 15/40] richacl: Automatic Inheritance Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 16/40] richacl: xattr mapping functions Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 17/40] vfs: Add richacl permission checking Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 18/40] ext4: Add richacl support Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 19/40] ext4: Add richacl feature flag Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 20/40] richacl: acl editing helper functions Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 21/40] richacl: Move everyone@ aces down the acl Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 22/40] richacl: Propagate everyone@ permissions to other aces Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 23/40] richacl: Set the owner permissions to the owner mask Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 24/40] richacl: Set the other permissions to the other mask Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 25/40] richacl: Isolate the owner and group classes Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 26/40] richacl: Apply the file masks to a richacl Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 27/40] richacl: Create richacl from mode values Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 28/40] nfsd: Keep list of acls to dispose of in compoundargs Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 29/40] nfsd: Use richacls as internal acl representation Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 30/40] nfsd: Add richacl support Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 31/40] nfsd: Add support for the v4.1 dacl attribute Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 32/40] nfsd: Add support for the MAY_CREATE_{FILE,DIR} permissions Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 33/40] richacl: Add support for unmapped identifiers Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 34/40] ext4: Don't allow unmapped identifiers in richacls Andreas Gruenbacher
2015-08-04 11:53 ` Andreas Gruenbacher [this message]
2015-08-04 11:53 ` [RFC v6 36/40] sunrpc: Add xdr_init_encode_pages Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 37/40] nfs: Fix GETATTR bitmap verification Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 38/40] nfs: Remove unused xdr page offsets in getacl/setacl arguments Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 39/40] nfs: Add richacl support Andreas Gruenbacher
2015-08-04 11:53 ` [RFC v6 40/40] nfs: Add support for the v4.1 dacl attribute Andreas Gruenbacher
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