init_rwsem(&mo->oo_sem);
init_rwsem(&mo->oo_ext_idx_sem);
spin_lock_init(&mo->oo_guard);
+ INIT_LIST_HEAD(&mo->oo_xattr_list);
return l;
} else {
return NULL;
return result;
}
+/* The first part of oxe_buf is xattr name, and is '\0' terminated.
+ * The left part is for value, binary mode. */
+struct osd_xattr_entry {
+ struct list_head oxe_list;
+ size_t oxe_len;
+ size_t oxe_namelen;
+ bool oxe_exist;
+ struct rcu_head oxe_rcu;
+ char oxe_buf[0];
+};
+
+static struct osd_xattr_entry *osd_oxc_lookup(struct osd_object *obj,
+ const char *name,
+ size_t namelen)
+{
+ struct osd_xattr_entry *oxe;
+
+ list_for_each_entry(oxe, &obj->oo_xattr_list, oxe_list) {
+ if (namelen == oxe->oxe_namelen &&
+ strncmp(name, oxe->oxe_buf, namelen) == 0)
+ return oxe;
+ }
+
+ return NULL;
+}
+
+static int osd_oxc_get(struct osd_object *obj, const char *name,
+ struct lu_buf *buf)
+{
+ struct osd_xattr_entry *oxe;
+ size_t vallen;
+ ENTRY;
+
+ rcu_read_lock();
+ oxe = osd_oxc_lookup(obj, name, strlen(name));
+ if (oxe == NULL) {
+ rcu_read_unlock();
+ RETURN(-ENOENT);
+ }
+
+ if (!oxe->oxe_exist) {
+ rcu_read_unlock();
+ RETURN(-ENODATA);
+ }
+
+ vallen = oxe->oxe_len - sizeof(*oxe) - oxe->oxe_namelen - 1;
+ LASSERT(vallen > 0);
+
+ if (buf->lb_buf == NULL) {
+ rcu_read_unlock();
+ RETURN(vallen);
+ }
+
+ if (buf->lb_len < vallen) {
+ rcu_read_unlock();
+ RETURN(-ERANGE);
+ }
+
+ memcpy(buf->lb_buf, oxe->oxe_buf + oxe->oxe_namelen + 1, vallen);
+ rcu_read_unlock();
+
+ RETURN(vallen);
+}
+
+static void osd_oxc_free(struct rcu_head *head)
+{
+ struct osd_xattr_entry *oxe;
+
+ oxe = container_of(head, struct osd_xattr_entry, oxe_rcu);
+ OBD_FREE(oxe, oxe->oxe_len);
+}
+
+static inline void __osd_oxc_del(struct osd_object *obj, const char *name)
+{
+ struct osd_xattr_entry *oxe;
+
+ oxe = osd_oxc_lookup(obj, name, strlen(name));
+ if (oxe != NULL) {
+ list_del(&oxe->oxe_list);
+ call_rcu(&oxe->oxe_rcu, osd_oxc_free);
+ }
+}
+
+static void osd_oxc_add(struct osd_object *obj, const char *name,
+ const char *buf, int buflen)
+{
+ struct osd_xattr_entry *oxe;
+ size_t namelen = strlen(name);
+ size_t len = sizeof(*oxe) + namelen + 1 + buflen;
+
+ OBD_ALLOC(oxe, len);
+ if (oxe == NULL)
+ return;
+
+ INIT_LIST_HEAD(&oxe->oxe_list);
+ oxe->oxe_len = len;
+ oxe->oxe_namelen = namelen;
+ memcpy(oxe->oxe_buf, name, namelen);
+ if (buflen > 0) {
+ LASSERT(buf != NULL);
+ memcpy(oxe->oxe_buf + namelen + 1, buf, buflen);
+ oxe->oxe_exist = true;
+ } else {
+ oxe->oxe_exist = false;
+ }
+
+ /* this should be rarely called, just remove old and add new */
+ spin_lock(&obj->oo_guard);
+ __osd_oxc_del(obj, name);
+ list_add_tail(&oxe->oxe_list, &obj->oo_xattr_list);
+ spin_unlock(&obj->oo_guard);
+}
+
+static void osd_oxc_del(struct osd_object *obj, const char *name)
+{
+ spin_lock(&obj->oo_guard);
+ __osd_oxc_del(obj, name);
+ spin_unlock(&obj->oo_guard);
+}
+
+static void osd_oxc_fini(struct osd_object *obj)
+{
+ struct osd_xattr_entry *oxe, *next;
+
+ list_for_each_entry_safe(oxe, next, &obj->oo_xattr_list, oxe_list) {
+ list_del(&oxe->oxe_list);
+ OBD_FREE(oxe, oxe->oxe_len);
+ }
+}
+
/*
* Concurrency: no concurrent access is possible that late in object
* life-cycle.
LINVRNT(osd_invariant(obj));
+ osd_oxc_fini(obj);
dt_object_fini(&obj->oo_dt);
if (obj->oo_hl_head != NULL)
ldiskfs_htree_lock_head_free(obj->oo_hl_head);
static int osd_xattr_get(const struct lu_env *env, struct dt_object *dt,
struct lu_buf *buf, const char *name)
{
- struct osd_object *obj = osd_dt_obj(dt);
- struct inode *inode = obj->oo_inode;
- struct osd_thread_info *info = osd_oti_get(env);
- struct dentry *dentry = &info->oti_obj_dentry;
+ struct osd_object *obj = osd_dt_obj(dt);
+ struct inode *inode = obj->oo_inode;
+ struct osd_thread_info *info = osd_oti_get(env);
+ struct dentry *dentry = &info->oti_obj_dentry;
+ bool cache_xattr = false;
+ int rc;
- /* version get is not real XATTR but uses xattr API */
- if (strcmp(name, XATTR_NAME_VERSION) == 0) {
- /* for version we are just using xattr API but change inode
- * field instead */
+ /* version get is not real XATTR but uses xattr API */
+ if (strcmp(name, XATTR_NAME_VERSION) == 0) {
+ /* for version we are just using xattr API but change inode
+ * field instead */
if (buf->lb_len == 0)
return sizeof(dt_obj_version_t);
osd_object_version_get(env, dt, buf->lb_buf);
return sizeof(dt_obj_version_t);
- }
+ }
if (!dt_object_exists(dt))
return -ENOENT;
LASSERT(inode->i_op != NULL);
LASSERT(inode->i_op->getxattr != NULL);
- return __osd_xattr_get(inode, dentry, name, buf->lb_buf, buf->lb_len);
-}
+ if (strcmp(name, XATTR_NAME_LOV) == 0 ||
+ strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0)
+ cache_xattr = true;
+
+ if (cache_xattr) {
+ rc = osd_oxc_get(obj, name, buf);
+ if (rc != -ENOENT)
+ return rc;
+ }
+
+ rc = __osd_xattr_get(inode, dentry, name, buf->lb_buf, buf->lb_len);
+ if (cache_xattr) {
+ if (rc == -ENOENT || rc == -ENODATA)
+ osd_oxc_add(obj, name, NULL, 0);
+ else if (rc > 0 && buf->lb_buf != NULL)
+ osd_oxc_add(obj, name, buf->lb_buf, rc);
+ }
+ return rc;
+}
static int osd_declare_xattr_set(const struct lu_env *env,
struct dt_object *dt,
int rc;
ENTRY;
- LASSERT(handle != NULL);
+ LASSERT(handle != NULL);
- /* version set is not real XATTR */
- if (strcmp(name, XATTR_NAME_VERSION) == 0) {
- /* for version we are just using xattr API but change inode
- * field instead */
- LASSERT(buf->lb_len == sizeof(dt_obj_version_t));
- osd_object_version_set(env, dt, buf->lb_buf);
- return sizeof(dt_obj_version_t);
- }
+ /* version set is not real XATTR */
+ if (strcmp(name, XATTR_NAME_VERSION) == 0) {
+ /* for version we are just using xattr API but change inode
+ * field instead */
+ LASSERT(buf->lb_len == sizeof(dt_obj_version_t));
+ osd_object_version_set(env, dt, buf->lb_buf);
+ return sizeof(dt_obj_version_t);
+ }
CDEBUG(D_INODE, DFID" set xattr '%s' with size %zu\n",
PFID(lu_object_fid(&dt->do_lu)), name, buf->lb_len);
fs_flags);
osd_trans_exec_check(env, handle, OSD_OT_XATTR_SET);
+ if (rc == 0 &&
+ (strcmp(name, XATTR_NAME_LOV) == 0 ||
+ strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0))
+ osd_oxc_add(obj, name, buf->lb_buf, buf->lb_len);
+
return rc;
}
dentry->d_sb = inode->i_sb;
rc = inode->i_op->removexattr(dentry, name);
osd_trans_exec_check(env, handle, OSD_OT_XATTR_SET);
+
+ if (rc == 0 &&
+ (strcmp(name, XATTR_NAME_LOV) == 0 ||
+ strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0))
+ osd_oxc_del(obj, name);
+
return rc;
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff