From 04303d8ad06985bed4ea4f46018fc8f55a0962a8 Mon Sep 17 00:00:00 2001 From: "Yan, Zheng" Date: Thu, 21 Apr 2016 12:11:54 +0800 Subject: [PATCH] ceph: use CEPH_MDS_OP_RMXATTR request to remove xattr Setxattr with NULL value and XATTR_REPLACE flag should be equivalent to removexattr. But current MDS does not support deleting vxattrs through MDS_OP_SETXATTR request. The workaround is sending MDS_OP_RMXATTR request if setxattr actually removs xattr. Signed-off-by: Yan, Zheng --- fs/ceph/xattr.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-) diff --git a/fs/ceph/xattr.c b/fs/ceph/xattr.c index 5afabc4..426c83c 100644 --- a/fs/ceph/xattr.c +++ b/fs/ceph/xattr.c @@ -886,6 +886,7 @@ static int ceph_sync_setxattr(struct dentry *dentry, const char *name, struct ceph_mds_request *req; struct ceph_mds_client *mdsc = fsc->mdsc; struct ceph_pagelist *pagelist = NULL; + int op = CEPH_MDS_OP_SETXATTR; int err; if (size > 0) { @@ -899,20 +900,21 @@ static int ceph_sync_setxattr(struct dentry *dentry, const char *name, if (err) goto out; } else if (!value) { - flags |= CEPH_XATTR_REMOVE; + if (flags & CEPH_XATTR_REPLACE) + op = CEPH_MDS_OP_RMXATTR; + else + flags |= CEPH_XATTR_REMOVE; } dout("setxattr value=%.*s\n", (int)size, value); /* do request */ - req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETXATTR, - USE_AUTH_MDS); + req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); if (IS_ERR(req)) { err = PTR_ERR(req); goto out; } - req->r_args.setxattr.flags = cpu_to_le32(flags); req->r_path2 = kstrdup(name, GFP_NOFS); if (!req->r_path2) { ceph_mdsc_put_request(req); @@ -920,8 +922,11 @@ static int ceph_sync_setxattr(struct dentry *dentry, const char *name, goto out; } - req->r_pagelist = pagelist; - pagelist = NULL; + if (op == CEPH_MDS_OP_SETXATTR) { + req->r_args.setxattr.flags = cpu_to_le32(flags); + req->r_pagelist = pagelist; + pagelist = NULL; + } req->r_inode = inode; ihold(inode); -- 2.7.4