+static inline int lov_lum_lsm_cmp(struct lov_user_md *lum,
+ struct lov_stripe_md *lsm)
+{
+ if (lsm->lsm_magic != lum->lmm_magic)
+ return 1;
+ if ((lsm->lsm_stripe_count != 0) && (lum->lmm_stripe_count != 0) &&
+ (lsm->lsm_stripe_count != lum->lmm_stripe_count))
+ return 2;
+ if ((lsm->lsm_stripe_size != 0) && (lum->lmm_stripe_size != 0) &&
+ (lsm->lsm_stripe_size != lum->lmm_stripe_size))
+ return 3;
+ if ((lsm->lsm_pattern != 0) && (lum->lmm_pattern != 0) &&
+ (lsm->lsm_pattern != lum->lmm_pattern))
+ return 4;
+ if ((lsm->lsm_magic == LOV_MAGIC_V3) &&
+ (strncmp(lsm->lsm_pool_name,
+ ((struct lov_user_md_v3 *)lum)->lmm_pool_name,
+ LOV_MAXPOOLNAME) != 0))
+ return 5;
+ return 0;
+}
+
+static inline int lov_lum_swab_if_needed(struct lov_user_md_v3 *lumv3,
+ int *lmm_magic,
+ struct lov_user_md *lum)
+{
+ if (lum && cfs_copy_from_user(lumv3, lum,sizeof(struct lov_user_md_v1)))
+ return -EFAULT;
+
+ *lmm_magic = lumv3->lmm_magic;
+
+ if (*lmm_magic == __swab32(LOV_USER_MAGIC_V1)) {
+ lustre_swab_lov_user_md_v1((struct lov_user_md_v1 *)lumv3);
+ *lmm_magic = LOV_USER_MAGIC_V1;
+ } else if (*lmm_magic == LOV_USER_MAGIC_V3) {
+ if (lum && cfs_copy_from_user(lumv3, lum, sizeof(*lumv3)))
+ return -EFAULT;
+ } else if (*lmm_magic == __swab32(LOV_USER_MAGIC_V3)) {
+ if (lum && cfs_copy_from_user(lumv3, lum, sizeof(*lumv3)))
+ return -EFAULT;
+ lustre_swab_lov_user_md_v3(lumv3);
+ *lmm_magic = LOV_USER_MAGIC_V3;
+ } else if (*lmm_magic != LOV_USER_MAGIC_V1) {
+ CDEBUG(D_IOCTL,
+ "bad userland LOV MAGIC: %#08x != %#08x nor %#08x\n",
+ *lmm_magic, LOV_USER_MAGIC_V1, LOV_USER_MAGIC_V3);
+ return -EINVAL;
+ }
+ return 0;
+}
+