+static void ll_update_default_lsm_md(struct inode *inode, struct lustre_md *md)
+{
+ struct ll_inode_info *lli = ll_i2info(inode);
+
+ if (!md->default_lmv) {
+ /* clear default lsm */
+ if (lli->lli_default_lsm_md) {
+ down_write(&lli->lli_lsm_sem);
+ if (lli->lli_default_lsm_md) {
+ lmv_free_memmd(lli->lli_default_lsm_md);
+ lli->lli_default_lsm_md = NULL;
+ }
+ up_write(&lli->lli_lsm_sem);
+ }
+ } else if (lli->lli_default_lsm_md) {
+ /* update default lsm if it changes */
+ down_read(&lli->lli_lsm_sem);
+ if (lli->lli_default_lsm_md &&
+ !lsm_md_eq(lli->lli_default_lsm_md, md->default_lmv)) {
+ up_read(&lli->lli_lsm_sem);
+ down_write(&lli->lli_lsm_sem);
+ if (lli->lli_default_lsm_md)
+ lmv_free_memmd(lli->lli_default_lsm_md);
+ lli->lli_default_lsm_md = md->default_lmv;
+ lsm_md_dump(D_INODE, md->default_lmv);
+ md->default_lmv = NULL;
+ up_write(&lli->lli_lsm_sem);
+ } else {
+ up_read(&lli->lli_lsm_sem);
+ }
+ } else {
+ /* init default lsm */
+ down_write(&lli->lli_lsm_sem);
+ lli->lli_default_lsm_md = md->default_lmv;
+ lsm_md_dump(D_INODE, md->default_lmv);
+ md->default_lmv = NULL;
+ up_write(&lli->lli_lsm_sem);
+ }
+}
+