Linux-NFS Archive on lore.kernel.org
 help / color / Atom feed
From: Frank van der Linden <fllinden@amazon.com>
To: <bfields@fieldses.org>, <chuck.lever@oracle.com>,
	<linux-nfs@vger.kernel.org>
Cc: Frank van der Linden <fllinden@amazon.com>
Subject: [PATCH v3 10/10] nfsd: add fattr support for user extended attributes
Date: Tue, 23 Jun 2020 22:39:27 +0000
Message-ID: <20200623223927.31795-11-fllinden@amazon.com> (raw)
In-Reply-To: <20200623223927.31795-1-fllinden@amazon.com>

Check if user extended attributes are supported for an inode,
and return the answer when being queried for file attributes.

An exported filesystem can now signal its RFC8276 user extended
attributes capability.

Signed-off-by: Frank van der Linden <fllinden@amazon.com>
---
 fs/nfsd/nfs4xdr.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 8bacc0ceae19..259d5ad0e3f4 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -3213,6 +3213,15 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
 	}
 #endif
 
+	if (bmval2 & FATTR4_WORD2_XATTR_SUPPORT) {
+		p = xdr_reserve_space(xdr, 4);
+		if (!p)
+			goto out_resource;
+		err = xattr_supported_namespace(d_inode(dentry),
+						XATTR_USER_PREFIX);
+		*p++ = cpu_to_be32(err == 0);
+	}
+
 	attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
 	write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
 	status = nfs_ok;
-- 
2.17.2


  parent reply index

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-23 22:39 [PATCH v3 00/10] server side user xattr support (RFC 8276) Frank van der Linden
2020-06-23 22:39 ` [PATCH v3 01/10] xattr: break delegations in {set,remove}xattr Frank van der Linden
2020-06-23 22:39 ` [PATCH v3 02/10] xattr: add a function to check if a namespace is supported Frank van der Linden
2020-06-23 22:39 ` [PATCH v3 03/10] nfs,nfsd: NFSv4.2 extended attribute protocol definitions Frank van der Linden
2020-06-23 22:39 ` [PATCH v3 04/10] nfsd: split off the write decode code in to a separate function Frank van der Linden
2020-06-23 22:39 ` [PATCH v3 05/10] nfsd: add defines for NFSv4.2 extended attribute support Frank van der Linden
2020-06-23 22:39 ` [PATCH v3 06/10] nfsd: define xattr functions to call in to their vfs counterparts Frank van der Linden
2020-06-23 22:39 ` [PATCH v3 07/10] nfsd: take xattr bits in to account for permission checks Frank van der Linden
2020-06-23 22:39 ` [PATCH v3 08/10] nfsd: add structure definitions for xattr requests / responses Frank van der Linden
2020-06-23 22:39 ` [PATCH v3 09/10] nfsd: implement the xattr functions and en/decode logic Frank van der Linden
2020-06-23 22:39 ` Frank van der Linden [this message]
2020-06-25 16:50 ` [PATCH v3 00/10] server side user xattr support (RFC 8276) J. Bruce Fields
2020-06-25 17:13   ` Frank van der Linden
2020-06-25 16:53 ` J. Bruce Fields
2020-06-25 17:39   ` Frank van der Linden
2020-06-25 20:07     ` J. Bruce Fields
2020-07-04 14:37 ` Chuck Lever

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200623223927.31795-11-fllinden@amazon.com \
    --to=fllinden@amazon.com \
    --cc=bfields@fieldses.org \
    --cc=chuck.lever@oracle.com \
    --cc=linux-nfs@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-NFS Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-nfs/0 linux-nfs/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-nfs linux-nfs/ https://lore.kernel.org/linux-nfs \
		linux-nfs@vger.kernel.org
	public-inbox-index linux-nfs

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-nfs


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git