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| author |   Yan, Zheng <zyan@redhat.com> | 2014-12-17 21:26:47 +0800 |
|---|---|---|
| committer |   Ilya Dryomov <idryomov@redhat.com> | 2014-12-17 20:18:49 +0300 |
| commit | 0aeff37abada9f8c08d2b10481a43d3ae406c823 (patch) | |
| tree | 14b8ff5b4ab77f20fc9bf068923079b8b169ecb5 /fs | |
| parent | ceph: fix mksnap crash (diff) | |
| download | linux-dev-0aeff37abada9f8c08d2b10481a43d3ae406c823.tar.xz linux-dev-0aeff37abada9f8c08d2b10481a43d3ae406c823.zip | |
ceph: fix setting empty extended attribute
make sure 'value' is not null. otherwise __ceph_setxattr will remove
the extended attribute.
Signed-off-by: Yan, Zheng <zyan@redhat.com>
Reviewed-by: Sage Weil <sage@redhat.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ceph/xattr.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/fs/ceph/xattr.c b/fs/ceph/xattr.c index 678b0d2bbbc4..5a492caf34cb 100644 --- a/fs/ceph/xattr.c +++ b/fs/ceph/xattr.c @@ -854,7 +854,7 @@ static int ceph_sync_setxattr(struct dentry *dentry, const char *name, struct ceph_pagelist *pagelist = NULL; int err; - if (value) { + if (size > 0) { /* copy value into pagelist */ pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS); if (!pagelist) @@ -864,7 +864,7 @@ static int ceph_sync_setxattr(struct dentry *dentry, const char *name, err = ceph_pagelist_append(pagelist, value, size); if (err) goto out; - } else { + } else if (!value) { flags |= CEPH_XATTR_REMOVE; } @@ -1001,6 +1001,9 @@ int ceph_setxattr(struct dentry *dentry, const char *name, if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN)) return generic_setxattr(dentry, name, value, size, flags); + if (size == 0) + value = ""; /* empty EA, do not remove */ + return __ceph_setxattr(dentry, name, value, size, flags); } |