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diff --git a/stand/libsa/zfs/zfsimpl.c b/stand/libsa/zfs/zfsimpl.c
--- a/stand/libsa/zfs/zfsimpl.c
+++ b/stand/libsa/zfs/zfsimpl.c
@@ -43,12 +43,43 @@
extern int zstd_init(void);
#endif
+enum zfs_sa_attr_id {
+ ZFS_SA_ATIME,
+ ZFS_SA_MTIME,
+ ZFS_SA_CTIME,
+ ZFS_SA_CRTIME,
+ ZFS_SA_GEN,
+ ZFS_SA_MODE,
+ ZFS_SA_SIZE,
+ ZFS_SA_PARENT,
+ ZFS_SA_LINKS,
+ ZFS_SA_XATTR,
+ ZFS_SA_RDEV,
+ ZFS_SA_FLAGS,
+ ZFS_SA_UID,
+ ZFS_SA_GID,
+ ZFS_SA_PAD,
+ ZFS_SA_ZNODE_ACL,
+ ZFS_SA_DACL_COUNT,
+ ZFS_SA_SYMLINK,
+ ZFS_SA_SCANSTAMP,
+ ZFS_SA_DACL_ACES,
+ ZFS_SA_DXATTR,
+ ZFS_SA_PROJID,
+ ZFS_SA_SEQ,
+ ZFS_SA_COUNT
+};
+
struct zfsmount {
char *path;
const spa_t *spa;
objset_phys_t objset;
uint64_t rootobj;
uint64_t fsid_guid; /* mount's ds_fsid_guid */
+ dnode_phys_t sa_registry;
+ dnode_phys_t sa_layouts;
+ uint64_t sa_attrs[ZFS_SA_COUNT];
+ bool sa_loaded;
STAILQ_ENTRY(zfsmount) next;
};
@@ -3519,6 +3550,7 @@
{
mount->spa = spa;
+ mount->sa_loaded = false;
/*
* Find the root object set if not explicitly provided
@@ -3713,6 +3745,90 @@
return (rc);
}
+struct zfs_sa_attr {
+ const char *name;
+ uint16_t length;
+};
+
+static const struct zfs_sa_attr zfs_sa_attrs[ZFS_SA_COUNT] = {
+ [ZFS_SA_ATIME] = { "ZPL_ATIME", 16 },
+ [ZFS_SA_MTIME] = { "ZPL_MTIME", 16 },
+ [ZFS_SA_CTIME] = { "ZPL_CTIME", 16 },
+ [ZFS_SA_CRTIME] = { "ZPL_CRTIME", 16 },
+ [ZFS_SA_GEN] = { "ZPL_GEN", 8 },
+ [ZFS_SA_MODE] = { "ZPL_MODE", 8 },
+ [ZFS_SA_SIZE] = { "ZPL_SIZE", 8 },
+ [ZFS_SA_PARENT] = { "ZPL_PARENT", 8 },
+ [ZFS_SA_LINKS] = { "ZPL_LINKS", 8 },
+ [ZFS_SA_XATTR] = { "ZPL_XATTR", 8 },
+ [ZFS_SA_RDEV] = { "ZPL_RDEV", 8 },
+ [ZFS_SA_FLAGS] = { "ZPL_FLAGS", 8 },
+ [ZFS_SA_UID] = { "ZPL_UID", 8 },
+ [ZFS_SA_GID] = { "ZPL_GID", 8 },
+ [ZFS_SA_PAD] = { "ZPL_PAD", 32 },
+ [ZFS_SA_ZNODE_ACL] = { "ZPL_ZNODE_ACL", 88 },
+ [ZFS_SA_DACL_COUNT] = { "ZPL_DACL_COUNT", 8 },
+ [ZFS_SA_SYMLINK] = { "ZPL_SYMLINK", 0 },
+ [ZFS_SA_SCANSTAMP] = { "ZPL_SCANSTAMP", 32 },
+ [ZFS_SA_DACL_ACES] = { "ZPL_DACL_ACES", 0 },
+ [ZFS_SA_DXATTR] = { "ZPL_DXATTR", 0 },
+ [ZFS_SA_PROJID] = { "ZPL_PROJID", 8 },
+ [ZFS_SA_SEQ] = { "ZPL_SEQ", 8 },
+};
+
+#define ZFS_SA_MAX_ATTRS 256
+
+static int
+zfs_sa_load(struct zfsmount *mount)
+{
+ dnode_phys_t master, sa_master;
+ uint64_t sa_object, registry, layouts;
+ int error;
+
+ if (mount->sa_loaded)
+ return (0);
+
+ error = objset_get_dnode(mount->spa, &mount->objset, MASTER_NODE_OBJ,
+ &master);
+ if (error != 0)
+ return (error);
+ error = zap_lookup(mount->spa, &master, ZFS_SA_ATTRS,
+ sizeof(sa_object), 1, &sa_object);
+ if (error != 0)
+ return (error);
+ error = objset_get_dnode(mount->spa, &mount->objset, sa_object,
+ &sa_master);
+ if (error != 0)
+ return (error);
+ error = zap_lookup(mount->spa, &sa_master, SA_REGISTRY,
+ sizeof(registry), 1, &registry);
+ if (error != 0)
+ return (error);
+ error = zap_lookup(mount->spa, &sa_master, SA_LAYOUTS,
+ sizeof(layouts), 1, &layouts);
+ if (error != 0)
+ return (error);
+ error = objset_get_dnode(mount->spa, &mount->objset, registry,
+ &mount->sa_registry);
+ if (error != 0)
+ return (error);
+ error = objset_get_dnode(mount->spa, &mount->objset, layouts,
+ &mount->sa_layouts);
+ if (error != 0)
+ return (error);
+
+ for (unsigned int i = 0; i < nitems(zfs_sa_attrs); i++) {
+ error = zap_lookup(mount->spa, &mount->sa_registry,
+ zfs_sa_attrs[i].name, sizeof(mount->sa_attrs[i]), 1,
+ &mount->sa_attrs[i]);
+ if (error != 0)
+ mount->sa_attrs[i] = UINT64_MAX;
+ }
+
+ mount->sa_loaded = true;
+ return (0);
+}
+
static int
zfs_dnode_stat(struct zfsmount *mount, dnode_phys_t *dn, struct stat *sb,
uint64_t fsid_guid, uint64_t objnum)

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