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| author | Yan, Zheng <zheng.z.yan@intel.com> | 2014-02-11 13:04:19 +0800 |
|---|---|---|
| committer | Sage Weil <sage@inktank.com> | 2014-02-17 12:37:09 -0800 |
| commit | bcdfeb2eb4e42b811950b9cd226109291051732a (patch) | |
| tree | e84702e81ccca42d63e4e6ad8eece9e60bf5b8cd /fs/ceph/xattr.c | |
| parent | fbc0b970ddfab4b35dad27ebaae712af680bdc7e (diff) | |
| download | linux-bcdfeb2eb4e42b811950b9cd226109291051732a.tar.gz linux-bcdfeb2eb4e42b811950b9cd226109291051732a.tar.bz2 linux-bcdfeb2eb4e42b811950b9cd226109291051732a.zip | |
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/ceph/xattr.c')
| -rw-r--r-- | fs/ceph/xattr.c | 16 |
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); |