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authorYan, Zheng <zheng.z.yan@intel.com>2014-02-11 13:04:19 +0800
committerSage Weil <sage@inktank.com>2014-02-17 12:37:09 -0800
commitbcdfeb2eb4e42b811950b9cd226109291051732a (patch)
treee84702e81ccca42d63e4e6ad8eece9e60bf5b8cd /fs
parentfbc0b970ddfab4b35dad27ebaae712af680bdc7e (diff)
downloadlinux-bcdfeb2eb4e42b811950b9cd226109291051732a.tar.bz2
ceph: remove xattr when null value is given to setxattr()
For the setxattr request, introduce a new flag CEPH_XATTR_REMOVE to distinguish null value case from the zero-length value case. Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/ceph/xattr.c16
1 files changed, 14 insertions, 2 deletions
diff --git a/fs/ceph/xattr.c b/fs/ceph/xattr.c
index 28f9793b9167..231c02b16c0c 100644
--- a/fs/ceph/xattr.c
+++ b/fs/ceph/xattr.c
@@ -12,6 +12,9 @@
#define XATTR_CEPH_PREFIX "ceph."
#define XATTR_CEPH_PREFIX_LEN (sizeof (XATTR_CEPH_PREFIX) - 1)
+static int __remove_xattr(struct ceph_inode_info *ci,
+ struct ceph_inode_xattr *xattr);
+
/*
* List of handlers for synthetic system.* attributes. Other
* attributes are handled directly.
@@ -359,6 +362,12 @@ static int __set_xattr(struct ceph_inode_info *ci,
kfree(val);
return err;
}
+ if (update_xattr < 0) {
+ if (xattr)
+ __remove_xattr(ci, xattr);
+ kfree(name);
+ return 0;
+ }
}
if (!xattr) {
@@ -862,6 +871,9 @@ static int ceph_sync_setxattr(struct dentry *dentry, const char *name,
dout("setxattr value=%.*s\n", (int)size, value);
+ if (!value)
+ flags |= CEPH_XATTR_REMOVE;
+
/* do request */
req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETXATTR,
USE_AUTH_MDS);
@@ -965,8 +977,8 @@ retry:
goto retry;
}
- err = __set_xattr(ci, newname, name_len, newval,
- val_len, flags, 1, &xattr);
+ err = __set_xattr(ci, newname, name_len, newval, val_len,
+ flags, value ? 1 : -1, &xattr);
if (!err) {
dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL);