Moved lookup tables into separate struct to fix some race conditions

Fixed lingering issues due to zero work size InodeFinish
Fixed xattrs not applying due to the keys sometimes not being
null-terminated.
Updated performance numbers

src/xattr.zig

@@ -1,7 +1,7 @@
 const std = @import("std");
 
 const DecompFn = @import("decomp.zig").DecompFn;
-const Table = @import("table.zig").Table;
+const Table = @import("tables.zig").Table;
 const MetadataReader = @import("util/metadata.zig");
 const OffsetFile = @import("util/offset_file.zig");
 
@@ -30,7 +30,7 @@ const KeyRaw = packed struct {
 };
 
 pub const KeyValue = struct {
-    key: []u8,
+    key: [:0]u8,
     value: []u8,
 };
 
@@ -62,7 +62,7 @@ pub fn init(alloc: std.mem.Allocator, fil: OffsetFile, decomp: DecompFn, table_s
         .table = try .init(alloc, fil, decomp, table_start + 16, info.count),
     };
 }
-pub fn deinit(self: XattrTable) void {
+pub fn deinit(self: *XattrTable) void {
     self.table.deinit();
 }
 
@@ -80,19 +80,22 @@ pub fn get(self: *XattrTable, alloc: std.mem.Allocator, idx: u32) ![]KeyValue {
 
         switch (key_raw.type.prefix) {
             .user => {
-                kv.key = try alloc.alloc(u8, key_raw.name_size + 5);
+                kv.key = @ptrCast(try alloc.alloc(u8, key_raw.name_size + 5 + 1));
                 @memcpy(kv.key[0..5], "user.");
-                try meta.interface.readSliceAll(kv.key[5..]);
+                try meta.interface.readSliceAll(kv.key[5 .. kv.key.len - 1]);
+                kv.key[kv.key.len - 1] = 0;
             },
             .security => {
-                kv.key = try alloc.alloc(u8, key_raw.name_size + 9);
+                kv.key = @ptrCast(try alloc.alloc(u8, key_raw.name_size + 9 + 1));
                 @memcpy(kv.key[0..9], "security.");
-                try meta.interface.readSliceAll(kv.key[9..]);
+                try meta.interface.readSliceAll(kv.key[9 .. kv.key.len - 1]);
+                kv.key[kv.key.len - 1] = 0;
             },
             .trusted => {
-                kv.key = try alloc.alloc(u8, key_raw.name_size + 8);
+                kv.key = @ptrCast(try alloc.alloc(u8, key_raw.name_size + 8 + 1));
                 @memcpy(kv.key[0..8], "trusted.");
-                try meta.interface.readSliceAll(kv.key[8..]);
+                try meta.interface.readSliceAll(kv.key[8 .. kv.key.len - 1]);
+                kv.key[kv.key.len - 1] = 0;
             },
         }
         if (key_raw.type.out_of_line) {