From 4c73fd659b81a37b91120857beca5dfb5006e7c8 Mon Sep 17 00:00:00 2001 From: Igor Zalatov Date: Wed, 21 Apr 2021 22:41:22 +0300 Subject: [PATCH 1/5] Up XM530 --- .github/workflows/xm530_images.yml | 4 +++- Makefile | 4 ++-- .../configs/unknown_unknown_xm530_openipc_defconfig | 2 +- 3 files changed, 6 insertions(+), 4 deletions(-) diff --git a/.github/workflows/xm530_images.yml b/.github/workflows/xm530_images.yml index 30210ebe..2c8eb1a9 100644 --- a/.github/workflows/xm530_images.yml +++ b/.github/workflows/xm530_images.yml @@ -64,7 +64,9 @@ jobs: echo "ARCHIVE_FW=$ARCHIVE_FW" >> $GITHUB_ENV cd $GITHUB_WORKSPACE make BOARD=unknown_unknown_xm530_openipc all - tar -C ${GITHUB_WORKSPACE}/output/images -cvzf $ARCHIVE_FW rootfs.squashfs uImage + mv ${GITHUB_WORKSPACE}/output/images/uImage ${GITHUB_WORKSPACE}/output/images/uImage_xm530 + mv ${GITHUB_WORKSPACE}/output/images/rootfs.squashfs ${GITHUB_WORKSPACE}/output/images/rootfs.squashfs_xm530 + tar -C ${GITHUB_WORKSPACE}/output/images -cvzf $ARCHIVE_FW rootfs.squashfs_xm530 uImage_xm530 - name: Build XM530 SDK id: build-xm530-sdk diff --git a/Makefile b/Makefile index c093b2bd..ff928c77 100644 --- a/Makefile +++ b/Makefile @@ -2,8 +2,8 @@ ROOT_DIR := $(CURDIR) BR_VER := 2020.02 BR_DIR := $(ROOT_DIR)/buildroot-$(BR_VER) -BR_EXT_DIR := $(ROOT_DIR)/br-ext-chip-hisilicon -#BR_EXT_DIR := $(ROOT_DIR)/br-ext-chip-xiongmai +#BR_EXT_DIR := $(ROOT_DIR)/br-ext-chip-hisilicon +BR_EXT_DIR := $(ROOT_DIR)/br-ext-chip-xiongmai SCRIPTS_DIR := $(ROOT_DIR)/scripts BOARDS := $(shell ls -1 $(BR_EXT_DIR)/configs) diff --git a/br-ext-chip-xiongmai/configs/unknown_unknown_xm530_openipc_defconfig b/br-ext-chip-xiongmai/configs/unknown_unknown_xm530_openipc_defconfig index 272c295b..b3cb5e48 100644 --- a/br-ext-chip-xiongmai/configs/unknown_unknown_xm530_openipc_defconfig +++ b/br-ext-chip-xiongmai/configs/unknown_unknown_xm530_openipc_defconfig @@ -36,7 +36,7 @@ BR2_ROOTFS_OVERLAY="$(TOPDIR)/../general/overlay" # OpenIPC configuration BR2_TOOLCHAIN_BUILDROOT_VENDOR="openipc" -BR2_TARGET_GENERIC_ISSUE="Welcome to OpenIPC v21.04.18.1" +BR2_TARGET_GENERIC_ISSUE="Welcome to OpenIPC v21.04.21.1" BR2_TARGET_GENERIC_HOSTNAME="ipcam" BR2_GLOBAL_PATCH_DIR="$(TOPDIR)/../general/package/patches" From 00e10ae759914f90e21023e11bc3ae823541ddac Mon Sep 17 00:00:00 2001 From: Igor Zalatov Date: Thu, 22 Apr 2021 00:16:09 +0300 Subject: [PATCH 2/5] Up kernel config --- br-ext-chip-xiongmai/board/xm530/kernel/xm530.generic.config | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/br-ext-chip-xiongmai/board/xm530/kernel/xm530.generic.config b/br-ext-chip-xiongmai/board/xm530/kernel/xm530.generic.config index bc27ee77..210a3700 100644 --- a/br-ext-chip-xiongmai/board/xm530/kernel/xm530.generic.config +++ b/br-ext-chip-xiongmai/board/xm530/kernel/xm530.generic.config @@ -1279,7 +1279,7 @@ CONFIG_JFFS2_CMODE_FAVOURLZO=y CONFIG_CRAMFS=y CONFIG_SQUASHFS=y # CONFIG_SQUASHFS_XATTR is not set -# CONFIG_SQUASHFS_ZLIB is not set +CONFIG_SQUASHFS_ZLIB=y # CONFIG_SQUASHFS_LZO is not set CONFIG_SQUASHFS_XZ=y # CONFIG_SQUASHFS_4K_DEVBLK_SIZE is not set From 97c93def0c78ab335cc29aafcbdd4bab109e6e3f Mon Sep 17 00:00:00 2001 From: Igor Zalatov Date: Thu, 22 Apr 2021 09:41:22 +0300 Subject: [PATCH 3/5] Update kernel configs --- .../board/xm530/kernel/xm530.generic.config | 1 + .../kernel/xm530.generic.config.original | 1637 +++++++++++++++++ 2 files changed, 1638 insertions(+) create mode 100644 br-ext-chip-xiongmai/board/xm530/kernel/xm530.generic.config.original diff --git a/br-ext-chip-xiongmai/board/xm530/kernel/xm530.generic.config b/br-ext-chip-xiongmai/board/xm530/kernel/xm530.generic.config index 210a3700..de52a988 100644 --- a/br-ext-chip-xiongmai/board/xm530/kernel/xm530.generic.config +++ b/br-ext-chip-xiongmai/board/xm530/kernel/xm530.generic.config @@ -1217,6 +1217,7 @@ CONFIG_INOTIFY_USER=y CONFIG_AUTOFS4_FS=m CONFIG_FUSE_FS=y # CONFIG_CUSE is not set +CONFIG_OVERLAYFS_FS=y # # Caches diff --git a/br-ext-chip-xiongmai/board/xm530/kernel/xm530.generic.config.original b/br-ext-chip-xiongmai/board/xm530/kernel/xm530.generic.config.original new file mode 100644 index 00000000..e73de2c6 --- /dev/null +++ b/br-ext-chip-xiongmai/board/xm530/kernel/xm530.generic.config.original @@ -0,0 +1,1637 @@ +# +# Automatically generated file; DO NOT EDIT. +# Linux/arm 3.10.103 Kernel Configuration +# +CONFIG_ARM=y +CONFIG_MIGHT_HAVE_PCI=y +CONFIG_SYS_SUPPORTS_APM_EMULATION=y +CONFIG_HAVE_PROC_CPU=y +CONFIG_STACKTRACE_SUPPORT=y +CONFIG_LOCKDEP_SUPPORT=y +CONFIG_TRACE_IRQFLAGS_SUPPORT=y +CONFIG_RWSEM_GENERIC_SPINLOCK=y +CONFIG_ARCH_HAS_CPUFREQ=y +CONFIG_GENERIC_HWEIGHT=y +CONFIG_GENERIC_CALIBRATE_DELAY=y +CONFIG_NEED_DMA_MAP_STATE=y +CONFIG_VECTORS_BASE=0xffff0000 +CONFIG_ARM_PATCH_PHYS_VIRT=y +CONFIG_NEED_MACH_IO_H=y +CONFIG_NEED_MACH_MEMORY_H=y +CONFIG_GENERIC_BUG=y +CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config" +CONFIG_IRQ_WORK=y +CONFIG_BUILDTIME_EXTABLE_SORT=y + +# +# General setup +# +CONFIG_INIT_ENV_ARG_LIMIT=32 +CONFIG_CROSS_COMPILE="" +CONFIG_LOCALVERSION="" +# CONFIG_LOCALVERSION_AUTO is not set +CONFIG_HAVE_KERNEL_GZIP=y +CONFIG_HAVE_KERNEL_LZMA=y +CONFIG_HAVE_KERNEL_XZ=y +CONFIG_HAVE_KERNEL_LZO=y +# CONFIG_KERNEL_GZIP is not set +# CONFIG_KERNEL_LZMA is not set +CONFIG_KERNEL_XZ=y +# CONFIG_KERNEL_LZO is not set +CONFIG_DEFAULT_HOSTNAME="(none)" +# CONFIG_SWAP is not set +CONFIG_SYSVIPC=y +CONFIG_SYSVIPC_SYSCTL=y +# CONFIG_POSIX_MQUEUE is not set +# CONFIG_FHANDLE is not set +# CONFIG_AUDIT is not set +CONFIG_HAVE_GENERIC_HARDIRQS=y + +# +# IRQ subsystem +# +CONFIG_GENERIC_HARDIRQS=y +CONFIG_GENERIC_IRQ_PROBE=y +CONFIG_GENERIC_IRQ_SHOW=y +CONFIG_HARDIRQS_SW_RESEND=y +CONFIG_IRQ_DOMAIN=y +CONFIG_KTIME_SCALAR=y +CONFIG_GENERIC_CLOCKEVENTS=y +CONFIG_GENERIC_CLOCKEVENTS_BUILD=y +CONFIG_ARCH_HAS_TICK_BROADCAST=y +CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y + +# +# Timers subsystem +# +CONFIG_TICK_ONESHOT=y +CONFIG_NO_HZ_COMMON=y +# CONFIG_HZ_PERIODIC is not set +CONFIG_NO_HZ_IDLE=y +# CONFIG_NO_HZ is not set +# CONFIG_HIGH_RES_TIMERS is not set + +# +# CPU/Task time and stats accounting +# +CONFIG_TICK_CPU_ACCOUNTING=y +# CONFIG_IRQ_TIME_ACCOUNTING is not set +CONFIG_BSD_PROCESS_ACCT=y +CONFIG_BSD_PROCESS_ACCT_V3=y +CONFIG_TASKSTATS=y +# CONFIG_TASK_DELAY_ACCT is not set +CONFIG_TASK_XACCT=y +CONFIG_TASK_IO_ACCOUNTING=y + +# +# RCU Subsystem +# +CONFIG_TREE_RCU=y +# CONFIG_PREEMPT_RCU is not set +CONFIG_RCU_STALL_COMMON=y +# CONFIG_RCU_USER_QS is not set +CONFIG_RCU_FANOUT=32 +CONFIG_RCU_FANOUT_LEAF=16 +# CONFIG_RCU_FANOUT_EXACT is not set +# CONFIG_RCU_FAST_NO_HZ is not set +# CONFIG_TREE_RCU_TRACE is not set +# CONFIG_RCU_NOCB_CPU is not set +# CONFIG_IKCONFIG is not set +CONFIG_LOG_BUF_SHIFT=14 +# CONFIG_CGROUPS is not set +# CONFIG_CHECKPOINT_RESTORE is not set +# CONFIG_NAMESPACES is not set +CONFIG_UIDGID_CONVERTED=y +# CONFIG_UIDGID_STRICT_TYPE_CHECKS is not set +# CONFIG_SCHED_AUTOGROUP is not set +# CONFIG_SYSFS_DEPRECATED is not set +# CONFIG_RELAY is not set +# CONFIG_BLK_DEV_INITRD is not set +# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set +CONFIG_SYSCTL=y +CONFIG_ANON_INODES=y +CONFIG_HAVE_UID16=y +CONFIG_HOTPLUG=y +CONFIG_EXPERT=y +CONFIG_UID16=y +CONFIG_SYSCTL_SYSCALL=y +# CONFIG_KALLSYMS is not set +CONFIG_PRINTK=y +CONFIG_BUG=y +# CONFIG_ELF_CORE is not set +CONFIG_BASE_FULL=y +CONFIG_FUTEX=y +CONFIG_EPOLL=y +CONFIG_SIGNALFD=y +CONFIG_TIMERFD=y +CONFIG_EVENTFD=y +CONFIG_SHMEM=y +# CONFIG_AIO is not set +# CONFIG_EMBEDDED is not set +CONFIG_HAVE_PERF_EVENTS=y +CONFIG_PERF_USE_VMALLOC=y + +# +# Kernel Performance Events And Counters +# +# CONFIG_PERF_EVENTS is not set +# CONFIG_VM_EVENT_COUNTERS is not set +# CONFIG_SLUB_DEBUG is not set +# CONFIG_COMPAT_BRK is not set +# CONFIG_SLAB is not set +CONFIG_SLUB=y +# CONFIG_SLOB is not set +# CONFIG_PROFILING is not set +CONFIG_HAVE_OPROFILE=y +# CONFIG_KPROBES is not set +# CONFIG_JUMP_LABEL is not set +# CONFIG_HAVE_64BIT_ALIGNED_ACCESS is not set +CONFIG_HAVE_KPROBES=y +CONFIG_HAVE_KRETPROBES=y +CONFIG_HAVE_ARCH_TRACEHOOK=y +CONFIG_HAVE_DMA_ATTRS=y +CONFIG_HAVE_DMA_CONTIGUOUS=y +CONFIG_USE_GENERIC_SMP_HELPERS=y +CONFIG_GENERIC_SMP_IDLE_THREAD=y +CONFIG_GENERIC_IDLE_POLL_SETUP=y +CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y +CONFIG_HAVE_CLK=y +CONFIG_HAVE_DMA_API_DEBUG=y +CONFIG_HAVE_ARCH_JUMP_LABEL=y +CONFIG_ARCH_WANT_IPC_PARSE_VERSION=y +CONFIG_HAVE_ARCH_SECCOMP_FILTER=y +CONFIG_HAVE_CONTEXT_TRACKING=y +CONFIG_HAVE_IRQ_TIME_ACCOUNTING=y +CONFIG_MODULES_USE_ELF_REL=y +CONFIG_CLONE_BACKWARDS=y +CONFIG_OLD_SIGSUSPEND3=y +CONFIG_OLD_SIGACTION=y + +# +# GCOV-based kernel profiling +# +CONFIG_HAVE_GENERIC_DMA_COHERENT=y +CONFIG_RT_MUTEXES=y +CONFIG_BASE_SMALL=0 +CONFIG_MODULES=y +# CONFIG_MODULE_FORCE_LOAD is not set +CONFIG_MODULE_UNLOAD=y +# CONFIG_MODULE_FORCE_UNLOAD is not set +# CONFIG_MODVERSIONS is not set +# CONFIG_MODULE_SRCVERSION_ALL is not set +# CONFIG_MODULE_SIG is not set +CONFIG_STOP_MACHINE=y +CONFIG_BLOCK=y +# CONFIG_LBDAF is not set +CONFIG_BLK_DEV_BSG=y +# CONFIG_BLK_DEV_BSGLIB is not set +# CONFIG_BLK_DEV_INTEGRITY is not set + +# +# Partition Types +# +CONFIG_PARTITION_ADVANCED=y +# CONFIG_ACORN_PARTITION is not set +# CONFIG_OSF_PARTITION is not set +# CONFIG_AMIGA_PARTITION is not set +# CONFIG_ATARI_PARTITION is not set +# CONFIG_MAC_PARTITION is not set +CONFIG_MSDOS_PARTITION=y +# CONFIG_BSD_DISKLABEL is not set +# CONFIG_MINIX_SUBPARTITION is not set +# CONFIG_SOLARIS_X86_PARTITION is not set +# CONFIG_UNIXWARE_DISKLABEL is not set +# CONFIG_LDM_PARTITION is not set +# CONFIG_SGI_PARTITION is not set +# CONFIG_ULTRIX_PARTITION is not set +# CONFIG_SUN_PARTITION is not set +# CONFIG_KARMA_PARTITION is not set +# CONFIG_EFI_PARTITION is not set +# CONFIG_SYSV68_PARTITION is not set + +# +# IO Schedulers +# +CONFIG_IOSCHED_NOOP=y +CONFIG_IOSCHED_DEADLINE=y +CONFIG_IOSCHED_CFQ=y +CONFIG_DEFAULT_DEADLINE=y +# CONFIG_DEFAULT_CFQ is not set +# CONFIG_DEFAULT_NOOP is not set +CONFIG_DEFAULT_IOSCHED="deadline" +CONFIG_INLINE_SPIN_UNLOCK_IRQ=y +CONFIG_INLINE_READ_UNLOCK=y +CONFIG_INLINE_READ_UNLOCK_IRQ=y +CONFIG_INLINE_WRITE_UNLOCK=y +CONFIG_INLINE_WRITE_UNLOCK_IRQ=y +CONFIG_ARCH_SUPPORTS_ATOMIC_RMW=y +CONFIG_MUTEX_SPIN_ON_OWNER=y +CONFIG_FREEZER=y + +# +# System Type +# +CONFIG_MMU=y +# CONFIG_ARCH_MULTIPLATFORM is not set +# CONFIG_ARCH_INTEGRATOR is not set +# CONFIG_ARCH_REALVIEW is not set +# CONFIG_ARCH_VERSATILE is not set +# CONFIG_ARCH_AT91 is not set +# CONFIG_ARCH_CLPS711X is not set +# CONFIG_ARCH_GEMINI is not set +# CONFIG_ARCH_EBSA110 is not set +# CONFIG_ARCH_EP93XX is not set +# CONFIG_ARCH_FOOTBRIDGE is not set +# CONFIG_ARCH_NETX is not set +# CONFIG_ARCH_IOP13XX is not set +# CONFIG_ARCH_IOP32X is not set +# CONFIG_ARCH_IOP33X is not set +# CONFIG_ARCH_IXP4XX is not set +# CONFIG_ARCH_DOVE is not set +# CONFIG_ARCH_KIRKWOOD is not set +# CONFIG_ARCH_MV78XX0 is not set +# CONFIG_ARCH_ORION5X is not set +# CONFIG_ARCH_MMP is not set +# CONFIG_ARCH_KS8695 is not set +# CONFIG_ARCH_W90X900 is not set +# CONFIG_ARCH_LPC32XX is not set +# CONFIG_ARCH_PXA is not set +# CONFIG_ARCH_MSM is not set +# CONFIG_ARCH_SHMOBILE is not set +# CONFIG_ARCH_RPC is not set +# CONFIG_ARCH_SA1100 is not set +# CONFIG_ARCH_S3C24XX is not set +# CONFIG_ARCH_S3C64XX is not set +# CONFIG_ARCH_S5P64X0 is not set +# CONFIG_ARCH_S5PC100 is not set +# CONFIG_ARCH_S5PV210 is not set +# CONFIG_ARCH_EXYNOS is not set +# CONFIG_ARCH_SHARK is not set +# CONFIG_ARCH_U300 is not set +# CONFIG_ARCH_DAVINCI is not set +# CONFIG_ARCH_OMAP1 is not set +CONFIG_ARCH_XM530=y +# CONFIG_ARCH_XM580 is not set +# CONFIG_PLAT_SPEAR is not set + +# +# xm530 board feature +# +CONFIG_MACH_XM530=y +CONFIG_DEFAULT_BUSCLK=50000000 +CONFIG_ARM_TIMER_SP804=y + +# +# Processor Type +# +CONFIG_CPU_V7=y +CONFIG_CPU_32v6K=y +CONFIG_CPU_32v7=y +CONFIG_CPU_ABRT_EV7=y +CONFIG_CPU_PABRT_V7=y +CONFIG_CPU_CACHE_V7=y +CONFIG_CPU_CACHE_VIPT=y +CONFIG_CPU_COPY_V6=y +CONFIG_CPU_TLB_V7=y +CONFIG_CPU_HAS_ASID=y +CONFIG_CPU_CP15=y +CONFIG_CPU_CP15_MMU=y + +# +# Processor Features +# +# CONFIG_ARM_LPAE is not set +# CONFIG_ARCH_PHYS_ADDR_T_64BIT is not set +CONFIG_ARM_THUMB=y +# CONFIG_ARM_THUMBEE is not set +CONFIG_ARM_VIRT_EXT=y +# CONFIG_SWP_EMULATE is not set +# CONFIG_CPU_ICACHE_DISABLE is not set +# CONFIG_CPU_DCACHE_DISABLE is not set +# CONFIG_CPU_BPREDICT_DISABLE is not set +CONFIG_KUSER_HELPERS=y +CONFIG_OUTER_CACHE=y +CONFIG_OUTER_CACHE_SYNC=y +CONFIG_MIGHT_HAVE_CACHE_L2X0=y +CONFIG_CACHE_L2X0=y +CONFIG_CACHE_PL310=y +CONFIG_ARM_L1_CACHE_SHIFT_6=y +CONFIG_ARM_L1_CACHE_SHIFT=6 +CONFIG_ARM_DMA_MEM_BUFFERABLE=y +CONFIG_ARM_NR_BANKS=8 +CONFIG_MULTI_IRQ_HANDLER=y +# CONFIG_ARM_ERRATA_430973 is not set +# CONFIG_ARM_ERRATA_458693 is not set +# CONFIG_ARM_ERRATA_460075 is not set +# CONFIG_ARM_ERRATA_742230 is not set +# CONFIG_ARM_ERRATA_742231 is not set +# CONFIG_PL310_ERRATA_588369 is not set +# CONFIG_ARM_ERRATA_643719 is not set +# CONFIG_ARM_ERRATA_720789 is not set +# CONFIG_PL310_ERRATA_727915 is not set +# CONFIG_ARM_ERRATA_743622 is not set +# CONFIG_ARM_ERRATA_751472 is not set +# CONFIG_PL310_ERRATA_753970 is not set +# CONFIG_ARM_ERRATA_754322 is not set +# CONFIG_ARM_ERRATA_754327 is not set +# CONFIG_ARM_ERRATA_764369 is not set +# CONFIG_PL310_ERRATA_769419 is not set +# CONFIG_ARM_ERRATA_775420 is not set +# CONFIG_ARM_ERRATA_798181 is not set + +# +# Bus support +# +CONFIG_ARM_AMBA=y +# CONFIG_PCI is not set +# CONFIG_PCI_SYSCALL is not set +# CONFIG_PCCARD is not set + +# +# Kernel Features +# +CONFIG_HAVE_SMP=y +CONFIG_SMP=y +CONFIG_SMP_ON_UP=y +# CONFIG_ARM_CPU_TOPOLOGY is not set +CONFIG_HAVE_ARM_SCU=y +# CONFIG_HAVE_ARM_ARCH_TIMER is not set +CONFIG_HAVE_ARM_TWD=y +# CONFIG_MCPM is not set +CONFIG_VMSPLIT_3G=y +# CONFIG_VMSPLIT_2G is not set +# CONFIG_VMSPLIT_1G is not set +CONFIG_PAGE_OFFSET=0xC0000000 +CONFIG_NR_CPUS=2 +CONFIG_HOTPLUG_CPU=y +# CONFIG_ARM_PSCI is not set +CONFIG_LOCAL_TIMERS=y +CONFIG_ARCH_NR_GPIO=0 +CONFIG_PREEMPT_NONE=y +# CONFIG_PREEMPT_VOLUNTARY is not set +# CONFIG_PREEMPT is not set +CONFIG_HZ=100 +# CONFIG_SCHED_HRTICK is not set +# CONFIG_THUMB2_KERNEL is not set +CONFIG_AEABI=y +CONFIG_OABI_COMPAT=y +# CONFIG_ARCH_SPARSEMEM_DEFAULT is not set +# CONFIG_ARCH_SELECT_MEMORY_MODEL is not set +CONFIG_HAVE_ARCH_PFN_VALID=y +# CONFIG_HIGHMEM is not set +CONFIG_FLATMEM=y +CONFIG_FLAT_NODE_MEM_MAP=y +CONFIG_HAVE_MEMBLOCK=y +# CONFIG_HAVE_BOOTMEM_INFO_NODE is not set +CONFIG_PAGEFLAGS_EXTENDED=y +CONFIG_SPLIT_PTLOCK_CPUS=4 +# CONFIG_COMPACTION is not set +# CONFIG_PHYS_ADDR_T_64BIT is not set +CONFIG_ZONE_DMA_FLAG=0 +# CONFIG_KSM is not set +CONFIG_DEFAULT_MMAP_MIN_ADDR=4096 +CONFIG_CROSS_MEMORY_ATTACH=y +# CONFIG_CLEANCACHE is not set +CONFIG_FORCE_MAX_ZONEORDER=11 +CONFIG_ALIGNMENT_TRAP=y +# CONFIG_UACCESS_WITH_MEMCPY is not set +# CONFIG_SECCOMP is not set +# CONFIG_CC_STACKPROTECTOR is not set + +# +# Boot options +# +# CONFIG_USE_OF is not set +CONFIG_ATAGS=y +# CONFIG_DEPRECATED_PARAM_STRUCT is not set +CONFIG_ZBOOT_ROM_TEXT=0x0 +CONFIG_ZBOOT_ROM_BSS=0x0 +CONFIG_CMDLINE="mem=128M console=ttyAMA0,115200 console=ttyMTD,blackbox" +CONFIG_CMDLINE_FROM_BOOTLOADER=y +# CONFIG_CMDLINE_EXTEND is not set +# CONFIG_CMDLINE_FORCE is not set +# CONFIG_XIP_KERNEL is not set +# CONFIG_KEXEC is not set +# CONFIG_CRASH_DUMP is not set +# CONFIG_AUTO_ZRELADDR is not set + +# +# CPU Power Management +# + +# +# CPU Frequency scaling +# +CONFIG_CPU_FREQ=y +CONFIG_CPU_FREQ_TABLE=y +CONFIG_CPU_FREQ_GOV_COMMON=y +CONFIG_CPU_FREQ_STAT=y +CONFIG_CPU_FREQ_STAT_DETAILS=y +CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y +# CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE is not set +# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set +# CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND is not set +# CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE is not set +CONFIG_CPU_FREQ_GOV_PERFORMANCE=y +CONFIG_CPU_FREQ_GOV_POWERSAVE=y +CONFIG_CPU_FREQ_GOV_USERSPACE=y +CONFIG_CPU_FREQ_GOV_ONDEMAND=y +CONFIG_CPU_FREQ_GOV_CONSERVATIVE=y + +# +# ARM CPU frequency scaling drivers +# +# CONFIG_ARM_EXYNOS4210_CPUFREQ is not set +# CONFIG_ARM_EXYNOS4X12_CPUFREQ is not set +# CONFIG_ARM_EXYNOS5250_CPUFREQ is not set +# CONFIG_ARM_KIRKWOOD_CPUFREQ is not set +# CONFIG_CPU_IDLE is not set +# CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED is not set + +# +# Floating point emulation +# + +# +# At least one emulation must be selected +# +# CONFIG_FPE_NWFPE is not set +# CONFIG_FPE_FASTFPE is not set +CONFIG_VFP=y +CONFIG_VFPv3=y +CONFIG_NEON=y + +# +# Userspace binary formats +# +CONFIG_BINFMT_ELF=y +CONFIG_ARCH_BINFMT_ELF_RANDOMIZE_PIE=y +CONFIG_BINFMT_SCRIPT=y +# CONFIG_HAVE_AOUT is not set +# CONFIG_BINFMT_MISC is not set +CONFIG_COREDUMP=y + +# +# Power management options +# +CONFIG_SUSPEND=y +CONFIG_SUSPEND_FREEZER=y +CONFIG_PM_SLEEP=y +CONFIG_PM_SLEEP_SMP=y +# CONFIG_PM_AUTOSLEEP is not set +# CONFIG_PM_WAKELOCKS is not set +# CONFIG_PM_RUNTIME is not set +CONFIG_PM=y +# CONFIG_PM_DEBUG is not set +# CONFIG_APM_EMULATION is not set +CONFIG_PM_CLK=y +CONFIG_CPU_PM=y +CONFIG_ARCH_SUSPEND_POSSIBLE=y +CONFIG_ARM_CPU_SUSPEND=y +CONFIG_NET=y + +# +# Networking options +# +CONFIG_PACKET=y +# CONFIG_PACKET_DIAG is not set +CONFIG_UNIX=y +# CONFIG_UNIX_DIAG is not set +CONFIG_XFRM=y +# CONFIG_XFRM_USER is not set +# CONFIG_XFRM_SUB_POLICY is not set +# CONFIG_XFRM_MIGRATE is not set +# CONFIG_XFRM_STATISTICS is not set +# CONFIG_NET_KEY is not set +CONFIG_INET=y +CONFIG_IP_MULTICAST=y +# CONFIG_IP_ADVANCED_ROUTER is not set +# CONFIG_IP_PNP is not set +# CONFIG_NET_IPIP is not set +# CONFIG_NET_IPGRE_DEMUX is not set +# CONFIG_NET_IP_TUNNEL is not set +# CONFIG_IP_MROUTE is not set +# CONFIG_ARPD is not set +# CONFIG_SYN_COOKIES is not set +# CONFIG_NET_IPVTI is not set +# CONFIG_INET_AH is not set +# CONFIG_INET_ESP is not set +# CONFIG_INET_IPCOMP is not set +# CONFIG_INET_XFRM_TUNNEL is not set +# CONFIG_INET_TUNNEL is not set +CONFIG_INET_XFRM_MODE_TRANSPORT=y +CONFIG_INET_XFRM_MODE_TUNNEL=y +CONFIG_INET_XFRM_MODE_BEET=y +CONFIG_INET_LRO=y +CONFIG_INET_DIAG=y +CONFIG_INET_TCP_DIAG=y +# CONFIG_INET_UDP_DIAG is not set +# CONFIG_TCP_CONG_ADVANCED is not set +CONFIG_TCP_CONG_CUBIC=y +CONFIG_DEFAULT_TCP_CONG="cubic" +# CONFIG_TCP_MD5SIG is not set +# CONFIG_IPV6 is not set +# CONFIG_NETWORK_SECMARK is not set +# CONFIG_NETWORK_PHY_TIMESTAMPING is not set +# CONFIG_NETFILTER is not set +# CONFIG_IP_DCCP is not set +# CONFIG_IP_SCTP is not set +# CONFIG_RDS is not set +# CONFIG_TIPC is not set +# CONFIG_ATM is not set +# CONFIG_L2TP is not set +# CONFIG_BRIDGE is not set +CONFIG_HAVE_NET_DSA=y +# CONFIG_VLAN_8021Q is not set +# CONFIG_DECNET is not set +# CONFIG_LLC2 is not set +# CONFIG_IPX is not set +# CONFIG_ATALK is not set +# CONFIG_X25 is not set +# CONFIG_LAPB is not set +# CONFIG_PHONET is not set +# CONFIG_IEEE802154 is not set +# CONFIG_NET_SCHED is not set +# CONFIG_DCB is not set +CONFIG_DNS_RESOLVER=y +# CONFIG_BATMAN_ADV is not set +# CONFIG_OPENVSWITCH is not set +# CONFIG_VSOCKETS is not set +# CONFIG_NETLINK_MMAP is not set +# CONFIG_NETLINK_DIAG is not set +CONFIG_RPS=y +CONFIG_RFS_ACCEL=y +CONFIG_XPS=y +CONFIG_BQL=y +# CONFIG_BPF_JIT is not set + +# +# Network testing +# +# CONFIG_NET_PKTGEN is not set +# CONFIG_HAMRADIO is not set +# CONFIG_CAN is not set +# CONFIG_IRDA is not set +# CONFIG_BT is not set +# CONFIG_AF_RXRPC is not set +CONFIG_WIRELESS=y +CONFIG_CFG80211=m +# CONFIG_NL80211_TESTMODE is not set +# CONFIG_CFG80211_DEVELOPER_WARNINGS is not set +# CONFIG_CFG80211_REG_DEBUG is not set +# CONFIG_CFG80211_CERTIFICATION_ONUS is not set +CONFIG_CFG80211_DEFAULT_PS=y +# CONFIG_CFG80211_INTERNAL_REGDB is not set +# CONFIG_CFG80211_WEXT is not set +# CONFIG_LIB80211 is not set +# CONFIG_MAC80211 is not set +# CONFIG_WIMAX is not set +# CONFIG_RFKILL is not set +# CONFIG_NET_9P is not set +# CONFIG_CAIF is not set +# CONFIG_CEPH_LIB is not set +# CONFIG_NFC is not set +CONFIG_HAVE_BPF_JIT=y + +# +# Device Drivers +# + +# +# Generic Driver Options +# +CONFIG_UEVENT_HELPER_PATH="/sbin/mdev" +# CONFIG_DEVTMPFS is not set +CONFIG_STANDALONE=y +# CONFIG_PREVENT_FIRMWARE_BUILD is not set +CONFIG_FW_LOADER=y +# CONFIG_FIRMWARE_IN_KERNEL is not set +CONFIG_EXTRA_FIRMWARE="" +CONFIG_FW_LOADER_USER_HELPER=y +# CONFIG_DEBUG_DRIVER is not set +# CONFIG_DEBUG_DEVRES is not set +# CONFIG_SYS_HYPERVISOR is not set +# CONFIG_GENERIC_CPU_DEVICES is not set +CONFIG_DMA_SHARED_BUFFER=y +# CONFIG_CMA is not set + +# +# Bus devices +# +# CONFIG_CONNECTOR is not set +CONFIG_MTD=y +# CONFIG_MTD_TESTS is not set +# CONFIG_MTD_REDBOOT_PARTS is not set +CONFIG_MTD_CMDLINE_PARTS=y +# CONFIG_MTD_AFS_PARTS is not set +# CONFIG_MTD_AR7_PARTS is not set + +# +# User Modules And Translation Layers +# +CONFIG_MTD_BLKDEVS=y +CONFIG_MTD_BLOCK=y +# CONFIG_FTL is not set +# CONFIG_NFTL is not set +# CONFIG_INFTL is not set +# CONFIG_RFD_FTL is not set +# CONFIG_SSFDC is not set +# CONFIG_SM_FTL is not set +# CONFIG_MTD_OOPS is not set + +# +# RAM/ROM/Flash chip drivers +# +# CONFIG_MTD_CFI is not set +# CONFIG_MTD_JEDECPROBE is not set +CONFIG_MTD_MAP_BANK_WIDTH_1=y +CONFIG_MTD_MAP_BANK_WIDTH_2=y +CONFIG_MTD_MAP_BANK_WIDTH_4=y +# CONFIG_MTD_MAP_BANK_WIDTH_8 is not set +# CONFIG_MTD_MAP_BANK_WIDTH_16 is not set +# CONFIG_MTD_MAP_BANK_WIDTH_32 is not set +CONFIG_MTD_CFI_I1=y +CONFIG_MTD_CFI_I2=y +# CONFIG_MTD_CFI_I4 is not set +# CONFIG_MTD_CFI_I8 is not set +# CONFIG_MTD_RAM is not set +# CONFIG_MTD_ROM is not set +# CONFIG_MTD_ABSENT is not set + +# +# Mapping drivers for chip access +# +# CONFIG_MTD_COMPLEX_MAPPINGS is not set +# CONFIG_MTD_PLATRAM is not set + +# +# Self-contained MTD device drivers +# +# CONFIG_MTD_SLRAM is not set +# CONFIG_MTD_PHRAM is not set +# CONFIG_MTD_MTDRAM is not set +CONFIG_MTD_BLOCK2MTD=y + +# +# Disk-On-Chip Device Drivers +# +# CONFIG_MTD_DOCG3 is not set +CONFIG_MTD_XMSFC=y +# CONFIG_MTD_NAND is not set +# CONFIG_MTD_ONENAND is not set + +# +# LPDDR flash memory drivers +# +# CONFIG_MTD_LPDDR is not set +# CONFIG_MTD_UBI is not set +# CONFIG_PARPORT is not set +CONFIG_BLK_DEV=y +# CONFIG_BLK_DEV_COW_COMMON is not set +# CONFIG_BLK_DEV_LOOP is not set +# CONFIG_BLK_DEV_DRBD is not set +# CONFIG_BLK_DEV_NBD is not set +CONFIG_BLK_DEV_RAM=y +CONFIG_BLK_DEV_RAM_COUNT=16 +CONFIG_BLK_DEV_RAM_SIZE=65536 +# CONFIG_BLK_DEV_XIP is not set +# CONFIG_CDROM_PKTCDVD is not set +# CONFIG_ATA_OVER_ETH is not set +# CONFIG_BLK_DEV_RBD is not set + +# +# Misc devices +# +# CONFIG_ATMEL_PWM is not set +# CONFIG_DUMMY_IRQ is not set +# CONFIG_ATMEL_SSC is not set +# CONFIG_ENCLOSURE_SERVICES is not set +# CONFIG_SRAM is not set +# CONFIG_C2PORT is not set + +# +# EEPROM support +# +# CONFIG_EEPROM_93CX6 is not set + +# +# Texas Instruments shared transport line discipline +# + +# +# Altera FPGA firmware download module +# + +# +# SCSI device support +# +CONFIG_SCSI_MOD=y +# CONFIG_RAID_ATTRS is not set +# CONFIG_SCSI is not set +# CONFIG_SCSI_DMA is not set +# CONFIG_SCSI_NETLINK is not set +# CONFIG_ATA is not set +# CONFIG_MD is not set +CONFIG_NETDEVICES=y +CONFIG_NET_CORE=y +# CONFIG_BONDING is not set +# CONFIG_DUMMY is not set +# CONFIG_EQUALIZER is not set +CONFIG_MII=y +# CONFIG_NET_TEAM is not set +# CONFIG_MACVLAN is not set +# CONFIG_VXLAN is not set +# CONFIG_NETCONSOLE is not set +# CONFIG_NETPOLL is not set +# CONFIG_NET_POLL_CONTROLLER is not set +# CONFIG_TUN is not set +# CONFIG_VETH is not set + +# +# CAIF transport drivers +# + +# +# Distributed Switch Architecture drivers +# +# CONFIG_NET_DSA_MV88E6XXX is not set +# CONFIG_NET_DSA_MV88E6060 is not set +# CONFIG_NET_DSA_MV88E6XXX_NEED_PPU is not set +# CONFIG_NET_DSA_MV88E6131 is not set +# CONFIG_NET_DSA_MV88E6123_61_65 is not set +CONFIG_ETHERNET=y +CONFIG_NET_CADENCE=y +# CONFIG_ARM_AT91_ETHER is not set +# CONFIG_MACB is not set +CONFIG_NET_VENDOR_BROADCOM=y +# CONFIG_B44 is not set +# CONFIG_NET_CALXEDA_XGMAC is not set +CONFIG_NET_VENDOR_CIRRUS=y +# CONFIG_CS89x0 is not set +# CONFIG_DM9000 is not set +# CONFIG_DNET is not set +CONFIG_NET_VENDOR_FARADAY=y +# CONFIG_FTMAC100 is not set +# CONFIG_FTGMAC100 is not set +CONFIG_NET_VENDOR_INTEL=y +CONFIG_NET_VENDOR_I825XX=y +CONFIG_NET_VENDOR_MARVELL=y +# CONFIG_MVMDIO is not set +CONFIG_NET_VENDOR_MICREL=y +# CONFIG_KS8842 is not set +# CONFIG_KS8851_MLL is not set +CONFIG_NET_VENDOR_NATSEMI=y +CONFIG_NET_VENDOR_8390=y +# CONFIG_AX88796 is not set +# CONFIG_ETHOC is not set +CONFIG_NET_VENDOR_SEEQ=y +CONFIG_NET_VENDOR_SMSC=y +# CONFIG_SMC91X is not set +# CONFIG_SMC911X is not set +# CONFIG_SMSC911X is not set +CONFIG_NET_VENDOR_STMICRO=y +# CONFIG_STMMAC_ETH is not set +CONFIG_NET_VENDOR_WIZNET=y +# CONFIG_WIZNET_W5100 is not set +# CONFIG_WIZNET_W5300 is not set +CONFIG_PHYLIB=y + +# +# MII PHY device drivers +# +# CONFIG_AT803X_PHY is not set +# CONFIG_AMD_PHY is not set +# CONFIG_MARVELL_PHY is not set +# CONFIG_DAVICOM_PHY is not set +# CONFIG_QSEMI_PHY is not set +# CONFIG_LXT_PHY is not set +# CONFIG_CICADA_PHY is not set +# CONFIG_VITESSE_PHY is not set +# CONFIG_SMSC_PHY is not set +# CONFIG_BROADCOM_PHY is not set +# CONFIG_BCM87XX_PHY is not set +# CONFIG_ICPLUS_PHY is not set +# CONFIG_REALTEK_PHY is not set +# CONFIG_NATIONAL_PHY is not set +# CONFIG_STE10XP is not set +# CONFIG_LSI_ET1011C_PHY is not set +# CONFIG_MICREL_PHY is not set +# CONFIG_FIXED_PHY is not set +CONFIG_MDIO_BITBANG=y +# CONFIG_PPP is not set +# CONFIG_SLIP is not set + +# +# USB Network Adapters +# +# CONFIG_USB_CATC is not set +# CONFIG_USB_KAWETH is not set +# CONFIG_USB_PEGASUS is not set +# CONFIG_USB_RTL8150 is not set +# CONFIG_USB_RTL8152 is not set +# CONFIG_USB_USBNET is not set +# CONFIG_USB_IPHETH is not set +CONFIG_WLAN=y +# CONFIG_USB_ZD1201 is not set +# CONFIG_USB_NET_RNDIS_WLAN is not set +# CONFIG_ATH_CARDS is not set +# CONFIG_BRCMFMAC is not set +# CONFIG_HOSTAP is not set +# CONFIG_LIBERTAS is not set +# CONFIG_WL_TI is not set +# CONFIG_MWIFIEX is not set + +# +# Enable WiMAX (Networking options) to see the WiMAX drivers +# +# CONFIG_WAN is not set +CONFIG_NETDEV_1000=y +CONFIG_XMMAC_ETH=y +# CONFIG_ISDN is not set + +# +# Input device support +# +# CONFIG_INPUT is not set + +# +# Hardware I/O ports +# +CONFIG_SERIO=y +CONFIG_SERIO_SERPORT=y +# CONFIG_SERIO_AMBAKMI is not set +CONFIG_SERIO_LIBPS2=y +# CONFIG_SERIO_RAW is not set +# CONFIG_SERIO_ALTERA_PS2 is not set +# CONFIG_SERIO_PS2MULT is not set +# CONFIG_SERIO_ARC_PS2 is not set +CONFIG_GAMEPORT=m +CONFIG_GAMEPORT_NS558=m +CONFIG_GAMEPORT_L4=m + +# +# Character devices +# +CONFIG_TTY=y +# CONFIG_VT is not set +CONFIG_UNIX98_PTYS=y +# CONFIG_DEVPTS_MULTIPLE_INSTANCES is not set +# CONFIG_LEGACY_PTYS is not set +# CONFIG_SERIAL_NONSTANDARD is not set +# CONFIG_N_GSM is not set +# CONFIG_TRACE_SINK is not set +# CONFIG_DEVKMEM is not set + +# +# Serial drivers +# +# CONFIG_SERIAL_8250 is not set + +# +# Non-8250 serial port support +# +# CONFIG_SERIAL_AMBA_PL010 is not set +CONFIG_SERIAL_AMBA_PL011=y +CONFIG_SERIAL_AMBA_PL011_CONSOLE=y +CONFIG_SERIAL_CORE=y +CONFIG_SERIAL_CORE_CONSOLE=y +# CONFIG_SERIAL_SCCNXP is not set +# CONFIG_SERIAL_TIMBERDALE is not set +# CONFIG_SERIAL_ALTERA_JTAGUART is not set +# CONFIG_SERIAL_ALTERA_UART is not set +# CONFIG_SERIAL_ARC is not set +# CONFIG_TTY_PRINTK is not set +# CONFIG_HVC_DCC is not set +# CONFIG_IPMI_HANDLER is not set +# CONFIG_HW_RANDOM is not set +# CONFIG_R3964 is not set +# CONFIG_RAW_DRIVER is not set +# CONFIG_TCG_TPM is not set +# CONFIG_I2C is not set +# CONFIG_SPI is not set + +# +# Qualcomm MSM SSBI bus support +# +# CONFIG_SSBI is not set +# CONFIG_HSI is not set + +# +# PPS support +# +# CONFIG_PPS is not set + +# +# PPS generators support +# + +# +# PTP clock support +# +# CONFIG_PTP_1588_CLOCK is not set + +# +# Enable PHYLIB and NETWORK_PHY_TIMESTAMPING to see the additional clocks. +# +# CONFIG_PTP_1588_CLOCK_PCH is not set +CONFIG_ARCH_HAVE_CUSTOM_GPIO_H=y +CONFIG_GPIO_DEVRES=y +# CONFIG_W1 is not set +# CONFIG_POWER_SUPPLY is not set +# CONFIG_POWER_AVS is not set +# CONFIG_HWMON is not set +# CONFIG_THERMAL is not set +# CONFIG_WATCHDOG is not set +CONFIG_SSB_POSSIBLE=y + +# +# Sonics Silicon Backplane +# +# CONFIG_SSB is not set +CONFIG_BCMA_POSSIBLE=y + +# +# Broadcom specific AMBA +# +# CONFIG_BCMA is not set + +# +# Multifunction device drivers +# +# CONFIG_MFD_CORE is not set +# CONFIG_MFD_CROS_EC is not set +# CONFIG_HTC_PASIC3 is not set +# CONFIG_MFD_VIPERBOARD is not set +# CONFIG_MFD_SM501 is not set +# CONFIG_ABX500_CORE is not set +# CONFIG_MFD_SYSCON is not set +# CONFIG_MFD_TI_AM335X_TSCADC is not set +# CONFIG_MFD_TMIO is not set +# CONFIG_MFD_T7L66XB is not set +# CONFIG_MFD_TC6387XB is not set +# CONFIG_MFD_TC6393XB is not set +# CONFIG_REGULATOR is not set +# CONFIG_MEDIA_SUPPORT is not set + +# +# Graphics support +# +# CONFIG_DRM is not set +# CONFIG_VGASTATE is not set +# CONFIG_VIDEO_OUTPUT_CONTROL is not set +CONFIG_FB=y +# CONFIG_FIRMWARE_EDID is not set +# CONFIG_FB_DDC is not set +# CONFIG_FB_BOOT_VESA_SUPPORT is not set +# CONFIG_FB_CFB_FILLRECT is not set +# CONFIG_FB_CFB_COPYAREA is not set +# CONFIG_FB_CFB_IMAGEBLIT is not set +# CONFIG_FB_CFB_REV_PIXELS_IN_BYTE is not set +# CONFIG_FB_SYS_FILLRECT is not set +# CONFIG_FB_SYS_COPYAREA is not set +# CONFIG_FB_SYS_IMAGEBLIT is not set +# CONFIG_FB_FOREIGN_ENDIAN is not set +# CONFIG_FB_SYS_FOPS is not set +# CONFIG_FB_SVGALIB is not set +# CONFIG_FB_MACMODES is not set +# CONFIG_FB_BACKLIGHT is not set +# CONFIG_FB_MODE_HELPERS is not set +# CONFIG_FB_TILEBLITTING is not set + +# +# Frame buffer hardware drivers +# +# CONFIG_FB_ARMCLCD is not set +# CONFIG_FB_S1D13XXX is not set +# CONFIG_FB_SMSCUFX is not set +# CONFIG_FB_UDL is not set +# CONFIG_FB_GOLDFISH is not set +# CONFIG_FB_VIRTUAL is not set +# CONFIG_FB_METRONOME is not set +# CONFIG_FB_BROADSHEET is not set +# CONFIG_FB_AUO_K190X is not set +# CONFIG_EXYNOS_VIDEO is not set +# CONFIG_BACKLIGHT_LCD_SUPPORT is not set +# CONFIG_LOGO is not set +# CONFIG_SOUND is not set +CONFIG_USB_ARCH_HAS_OHCI=y +CONFIG_USB_ARCH_HAS_EHCI=y +CONFIG_USB_ARCH_HAS_XHCI=y +CONFIG_USB_SUPPORT=y +CONFIG_USB_COMMON=y +CONFIG_USB_ARCH_HAS_HCD=y +CONFIG_USB=y +# CONFIG_USB_DEBUG is not set +CONFIG_USB_ANNOUNCE_NEW_DEVICES=y + +# +# Miscellaneous USB options +# +# CONFIG_USB_DEFAULT_PERSIST is not set +# CONFIG_USB_DYNAMIC_MINORS is not set +# CONFIG_USB_OTG_WHITELIST is not set +# CONFIG_USB_OTG_BLACKLIST_HUB is not set +# CONFIG_USB_MON is not set +# CONFIG_USB_WUSB_CBAF is not set + +# +# USB Host Controller Drivers +# +# CONFIG_USB_C67X00_HCD is not set +# CONFIG_USB_XHCI_HCD is not set +# CONFIG_USB_EHCI_HCD is not set +# CONFIG_USB_OXU210HP_HCD is not set +# CONFIG_USB_ISP116X_HCD is not set +# CONFIG_USB_ISP1760_HCD is not set +# CONFIG_USB_ISP1362_HCD is not set +# CONFIG_USB_OHCI_HCD is not set +# CONFIG_USB_SL811_HCD is not set +# CONFIG_USB_R8A66597_HCD is not set + +# +# USB Device Class drivers +# +# CONFIG_USB_ACM is not set +# CONFIG_USB_PRINTER is not set +# CONFIG_USB_WDM is not set +# CONFIG_USB_TMC is not set + +# +# NOTE: USB_STORAGE depends on SCSI but BLK_DEV_SD may +# + +# +# also be needed; see USB_STORAGE Help for more info +# + +# +# USB Imaging devices +# +# CONFIG_USB_MDC800 is not set +# CONFIG_USB_DWC3 is not set +# CONFIG_USB_CHIPIDEA is not set + +# +# USB port drivers +# +# CONFIG_USB_SERIAL is not set + +# +# USB Miscellaneous drivers +# +# CONFIG_USB_EMI62 is not set +# CONFIG_USB_EMI26 is not set +# CONFIG_USB_ADUTUX is not set +# CONFIG_USB_SEVSEG is not set +# CONFIG_USB_RIO500 is not set +# CONFIG_USB_LEGOTOWER is not set +# CONFIG_USB_LCD is not set +# CONFIG_USB_LED is not set +# CONFIG_USB_CYPRESS_CY7C63 is not set +# CONFIG_USB_CYTHERM is not set +# CONFIG_USB_IDMOUSE is not set +# CONFIG_USB_FTDI_ELAN is not set +# CONFIG_USB_APPLEDISPLAY is not set +# CONFIG_USB_LD is not set +# CONFIG_USB_TRANCEVIBRATOR is not set +# CONFIG_USB_IOWARRIOR is not set +# CONFIG_USB_TEST is not set +# CONFIG_USB_ISIGHTFW is not set +# CONFIG_USB_YUREX is not set +# CONFIG_USB_EZUSB_FX2 is not set +# CONFIG_USB_PHY is not set +# CONFIG_USB_GADGET is not set +CONFIG_MMC=y +# CONFIG_MMC_DEBUG is not set +# CONFIG_MMC_UNSAFE_RESUME is not set +# CONFIG_MMC_CLKGATE is not set + +# +# MMC/SD/SDIO Card Drivers +# +CONFIG_MMC_BLOCK=y +CONFIG_MMC_BLOCK_MINORS=8 +CONFIG_MMC_BLOCK_BOUNCE=y +# CONFIG_SDIO_UART is not set +# CONFIG_MMC_TEST is not set + +# +# MMC/SD/SDIO Host Controller Drivers +# +CONFIG_MMC_ARASAN=y +# CONFIG_MMC_WIFI is not set +CONFIG_MMC_SD=m +# CONFIG_MMC_ARMMMCI is not set +# CONFIG_MMC_SDHCI is not set +# CONFIG_MMC_SDHCI_PXAV3 is not set +# CONFIG_MMC_SDHCI_PXAV2 is not set +# CONFIG_MMC_DW is not set +# CONFIG_MMC_VUB300 is not set +# CONFIG_MMC_USHC is not set +# CONFIG_MEMSTICK is not set +# CONFIG_NEW_LEDS is not set +# CONFIG_ACCESSIBILITY is not set +# CONFIG_EDAC is not set +CONFIG_RTC_LIB=y +# CONFIG_RTC_CLASS is not set +CONFIG_DMADEVICES=y +# CONFIG_DMADEVICES_DEBUG is not set + +# +# DMA Devices +# +# CONFIG_AMBA_PL08X is not set +# CONFIG_DW_DMAC is not set +# CONFIG_TIMB_DMA is not set +CONFIG_PL330_DMA=y +CONFIG_DMA_ENGINE=y + +# +# DMA Clients +# +# CONFIG_ASYNC_TX_DMA is not set +CONFIG_DMATEST=m +# CONFIG_AUXDISPLAY is not set +# CONFIG_UIO is not set +# CONFIG_VIRT_DRIVERS is not set + +# +# Virtio drivers +# +# CONFIG_VIRTIO_MMIO is not set + +# +# Microsoft Hyper-V guest support +# +# CONFIG_STAGING is not set +CONFIG_CLKDEV_LOOKUP=y + +# +# Hardware Spinlock drivers +# +CONFIG_CLKSRC_MMIO=y +# CONFIG_MAILBOX is not set +# CONFIG_IOMMU_SUPPORT is not set + +# +# Remoteproc drivers +# +# CONFIG_STE_MODEM_RPROC is not set + +# +# Rpmsg drivers +# +# CONFIG_PM_DEVFREQ is not set +# CONFIG_EXTCON is not set +# CONFIG_MEMORY is not set +# CONFIG_IIO is not set +# CONFIG_PWM is not set +CONFIG_ARM_GIC=y +# CONFIG_IPACK_BUS is not set +# CONFIG_RESET_CONTROLLER is not set + +# +# File systems +# +CONFIG_DCACHE_WORD_ACCESS=y +# CONFIG_EXT2_FS is not set +# CONFIG_EXT3_FS is not set +# CONFIG_EXT4_FS is not set +# CONFIG_REISERFS_FS is not set +# CONFIG_JFS_FS is not set +# CONFIG_XFS_FS is not set +# CONFIG_OCFS2_FS is not set +# CONFIG_BTRFS_FS is not set +# CONFIG_NILFS2_FS is not set +CONFIG_FS_POSIX_ACL=y +CONFIG_FILE_LOCKING=y +CONFIG_FSNOTIFY=y +CONFIG_DNOTIFY=y +CONFIG_INOTIFY_USER=y +# CONFIG_FANOTIFY is not set +# CONFIG_QUOTA is not set +# CONFIG_QUOTACTL is not set +CONFIG_AUTOFS4_FS=m +CONFIG_FUSE_FS=y +# CONFIG_CUSE is not set + +# +# Caches +# +# CONFIG_FSCACHE is not set + +# +# CD-ROM/DVD Filesystems +# +# CONFIG_ISO9660_FS is not set +# CONFIG_UDF_FS is not set + +# +# DOS/FAT/NT Filesystems +# +CONFIG_FAT_FS=y +# CONFIG_MSDOS_FS is not set +CONFIG_VFAT_FS=y +CONFIG_FAT_DEFAULT_CODEPAGE=437 +CONFIG_FAT_DEFAULT_IOCHARSET="iso8859-1" +# CONFIG_NTFS_FS is not set + +# +# Pseudo filesystems +# +CONFIG_PROC_FS=y +CONFIG_PROC_SYSCTL=y +CONFIG_PROC_PAGE_MONITOR=y +CONFIG_SYSFS=y +CONFIG_TMPFS=y +# CONFIG_TMPFS_POSIX_ACL is not set +# CONFIG_TMPFS_XATTR is not set +# CONFIG_HUGETLB_PAGE is not set +CONFIG_CONFIGFS_FS=y +CONFIG_MISC_FILESYSTEMS=y +# CONFIG_ADFS_FS is not set +# CONFIG_AFFS_FS is not set +# CONFIG_ECRYPT_FS is not set +# CONFIG_HFS_FS is not set +# CONFIG_HFSPLUS_FS is not set +# CONFIG_BEFS_FS is not set +# CONFIG_BFS_FS is not set +# CONFIG_EFS_FS is not set +CONFIG_JFFS2_FS=y +CONFIG_JFFS2_FS_DEBUG=0 +CONFIG_JFFS2_FS_WRITEBUFFER=y +# CONFIG_JFFS2_FS_WBUF_VERIFY is not set +# CONFIG_JFFS2_SUMMARY is not set +# CONFIG_JFFS2_FS_XATTR is not set +CONFIG_JFFS2_COMPRESSION_OPTIONS=y +CONFIG_JFFS2_ZLIB=y +CONFIG_JFFS2_LZO=y +CONFIG_JFFS2_RTIME=y +# CONFIG_JFFS2_RUBIN is not set +# CONFIG_JFFS2_CMODE_NONE is not set +# CONFIG_JFFS2_CMODE_PRIORITY is not set +# CONFIG_JFFS2_CMODE_SIZE is not set +CONFIG_JFFS2_CMODE_FAVOURLZO=y +# CONFIG_LOGFS is not set +CONFIG_CRAMFS=y +CONFIG_SQUASHFS=y +# CONFIG_SQUASHFS_XATTR is not set +# CONFIG_SQUASHFS_ZLIB is not set +# CONFIG_SQUASHFS_LZO is not set +CONFIG_SQUASHFS_XZ=y +# CONFIG_SQUASHFS_4K_DEVBLK_SIZE is not set +# CONFIG_SQUASHFS_EMBEDDED is not set +CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE=3 +# CONFIG_VXFS_FS is not set +# CONFIG_MINIX_FS is not set +# CONFIG_OMFS_FS is not set +# CONFIG_HPFS_FS is not set +# CONFIG_QNX4FS_FS is not set +# CONFIG_QNX6FS_FS is not set +# CONFIG_ROMFS_FS is not set +# CONFIG_PSTORE is not set +# CONFIG_SYSV_FS is not set +# CONFIG_UFS_FS is not set +# CONFIG_F2FS_FS is not set +CONFIG_NETWORK_FILESYSTEMS=y +CONFIG_NFS_FS=y +CONFIG_NFS_V2=y +CONFIG_NFS_V3=y +CONFIG_NFS_V3_ACL=y +CONFIG_NFS_V4=y +# CONFIG_NFS_SWAP is not set +# CONFIG_NFS_V4_1 is not set +# CONFIG_NFS_USE_LEGACY_DNS is not set +CONFIG_NFS_USE_KERNEL_DNS=y +# CONFIG_NFSD is not set +CONFIG_LOCKD=y +CONFIG_LOCKD_V4=y +CONFIG_NFS_ACL_SUPPORT=y +CONFIG_NFS_COMMON=y +CONFIG_SUNRPC=y +CONFIG_SUNRPC_GSS=y +# CONFIG_SUNRPC_DEBUG is not set +# CONFIG_CEPH_FS is not set +CONFIG_CIFS=y +# CONFIG_CIFS_STATS is not set +# CONFIG_CIFS_WEAK_PW_HASH is not set +# CONFIG_CIFS_UPCALL is not set +# CONFIG_CIFS_XATTR is not set +# CONFIG_CIFS_DEBUG is not set +# CONFIG_CIFS_DFS_UPCALL is not set +# CONFIG_CIFS_SMB2 is not set +# CONFIG_NCP_FS is not set +# CONFIG_CODA_FS is not set +# CONFIG_AFS_FS is not set +CONFIG_NLS=y +CONFIG_NLS_DEFAULT="iso8859-1" +CONFIG_NLS_CODEPAGE_437=y +CONFIG_NLS_CODEPAGE_737=m +CONFIG_NLS_CODEPAGE_775=m +CONFIG_NLS_CODEPAGE_850=m +CONFIG_NLS_CODEPAGE_852=m +CONFIG_NLS_CODEPAGE_855=m +CONFIG_NLS_CODEPAGE_857=m +CONFIG_NLS_CODEPAGE_860=m +CONFIG_NLS_CODEPAGE_861=m +CONFIG_NLS_CODEPAGE_862=m +CONFIG_NLS_CODEPAGE_863=m +CONFIG_NLS_CODEPAGE_864=m +CONFIG_NLS_CODEPAGE_865=m +CONFIG_NLS_CODEPAGE_866=m +CONFIG_NLS_CODEPAGE_869=m +CONFIG_NLS_CODEPAGE_936=y +CONFIG_NLS_CODEPAGE_950=m +CONFIG_NLS_CODEPAGE_932=m +CONFIG_NLS_CODEPAGE_949=m +CONFIG_NLS_CODEPAGE_874=m +CONFIG_NLS_ISO8859_8=m +CONFIG_NLS_CODEPAGE_1250=m +CONFIG_NLS_CODEPAGE_1251=m +CONFIG_NLS_ASCII=y +CONFIG_NLS_ISO8859_1=y +CONFIG_NLS_ISO8859_2=m +CONFIG_NLS_ISO8859_3=m +CONFIG_NLS_ISO8859_4=m +CONFIG_NLS_ISO8859_5=m +CONFIG_NLS_ISO8859_6=m +CONFIG_NLS_ISO8859_7=m +CONFIG_NLS_ISO8859_9=m +CONFIG_NLS_ISO8859_13=m +CONFIG_NLS_ISO8859_14=m +CONFIG_NLS_ISO8859_15=m +CONFIG_NLS_KOI8_R=m +CONFIG_NLS_KOI8_U=m +# CONFIG_NLS_MAC_ROMAN is not set +# CONFIG_NLS_MAC_CELTIC is not set +# CONFIG_NLS_MAC_CENTEURO is not set +# CONFIG_NLS_MAC_CROATIAN is not set +# CONFIG_NLS_MAC_CYRILLIC is not set +# CONFIG_NLS_MAC_GAELIC is not set +# CONFIG_NLS_MAC_GREEK is not set +# CONFIG_NLS_MAC_ICELAND is not set +# CONFIG_NLS_MAC_INUIT is not set +# CONFIG_NLS_MAC_ROMANIAN is not set +# CONFIG_NLS_MAC_TURKISH is not set +CONFIG_NLS_UTF8=y +# CONFIG_DLM is not set + +# +# Kernel hacking +# +# CONFIG_PRINTK_TIME is not set +CONFIG_DEFAULT_MESSAGE_LOGLEVEL=4 +# CONFIG_ENABLE_WARN_DEPRECATED is not set +# CONFIG_ENABLE_MUST_CHECK is not set +CONFIG_FRAME_WARN=1024 +# CONFIG_MAGIC_SYSRQ is not set +# CONFIG_STRIP_ASM_SYMS is not set +# CONFIG_READABLE_ASM is not set +# CONFIG_UNUSED_SYMBOLS is not set +# CONFIG_DEBUG_FS is not set +# CONFIG_HEADERS_CHECK is not set +# CONFIG_DEBUG_SECTION_MISMATCH is not set +CONFIG_DEBUG_KERNEL=y +# CONFIG_DEBUG_SHIRQ is not set +# CONFIG_LOCKUP_DETECTOR is not set +# CONFIG_PANIC_ON_OOPS is not set +CONFIG_PANIC_ON_OOPS_VALUE=0 +# CONFIG_DETECT_HUNG_TASK is not set +# CONFIG_SCHED_DEBUG is not set +# CONFIG_SCHEDSTATS is not set +# CONFIG_TIMER_STATS is not set +# CONFIG_DEBUG_OBJECTS is not set +# CONFIG_SLUB_STATS is not set +CONFIG_HAVE_DEBUG_KMEMLEAK=y +# CONFIG_DEBUG_KMEMLEAK is not set +# CONFIG_DEBUG_RT_MUTEXES is not set +# CONFIG_RT_MUTEX_TESTER is not set +# CONFIG_DEBUG_SPINLOCK is not set +# CONFIG_DEBUG_MUTEXES is not set +# CONFIG_DEBUG_LOCK_ALLOC is not set +# CONFIG_PROVE_LOCKING is not set +# CONFIG_LOCK_STAT is not set +# CONFIG_DEBUG_ATOMIC_SLEEP is not set +# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set +# CONFIG_DEBUG_STACK_USAGE is not set +# CONFIG_DEBUG_KOBJECT is not set +# CONFIG_DEBUG_BUGVERBOSE is not set +# CONFIG_DEBUG_INFO is not set +# CONFIG_DEBUG_VM is not set +# CONFIG_DEBUG_WRITECOUNT is not set +# CONFIG_DEBUG_MEMORY_INIT is not set +# CONFIG_DEBUG_LIST is not set +# CONFIG_TEST_LIST_SORT is not set +# CONFIG_DEBUG_SG is not set +# CONFIG_DEBUG_NOTIFIERS is not set +# CONFIG_DEBUG_CREDENTIALS is not set +CONFIG_FRAME_POINTER=y +# CONFIG_BOOT_PRINTK_DELAY is not set + +# +# RCU Debugging +# +# CONFIG_SPARSE_RCU_POINTER is not set +# CONFIG_RCU_TORTURE_TEST is not set +CONFIG_RCU_CPU_STALL_TIMEOUT=21 +# CONFIG_RCU_CPU_STALL_INFO is not set +# CONFIG_RCU_TRACE is not set +# CONFIG_BACKTRACE_SELF_TEST is not set +# CONFIG_DEBUG_BLOCK_EXT_DEVT is not set +# CONFIG_DEBUG_FORCE_WEAK_PER_CPU is not set +# CONFIG_DEBUG_PER_CPU_MAPS is not set +# CONFIG_NOTIFIER_ERROR_INJECTION is not set +# CONFIG_FAULT_INJECTION is not set +# CONFIG_DEBUG_PAGEALLOC is not set +CONFIG_HAVE_FUNCTION_TRACER=y +CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y +CONFIG_HAVE_DYNAMIC_FTRACE=y +CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y +CONFIG_HAVE_SYSCALL_TRACEPOINTS=y +CONFIG_HAVE_C_RECORDMCOUNT=y +CONFIG_TRACING_SUPPORT=y +# CONFIG_FTRACE is not set +# CONFIG_RBTREE_TEST is not set +# CONFIG_INTERVAL_TREE_TEST is not set +# CONFIG_DMA_API_DEBUG is not set +# CONFIG_ATOMIC64_SELFTEST is not set +# CONFIG_SAMPLES is not set +CONFIG_HAVE_ARCH_KGDB=y +# CONFIG_KGDB is not set +# CONFIG_TEST_STRING_HELPERS is not set +# CONFIG_TEST_KSTRTOX is not set +# CONFIG_STRICT_DEVMEM is not set +# CONFIG_ARM_UNWIND is not set +# CONFIG_DEBUG_USER is not set +# CONFIG_DEBUG_LL is not set +CONFIG_DEBUG_LL_INCLUDE="mach/debug-macro.S" +CONFIG_UNCOMPRESS_INCLUDE="mach/uncompress.h" +# CONFIG_OC_ETM is not set +# CONFIG_PID_IN_CONTEXTIDR is not set + +# +# Security options +# +CONFIG_KEYS=y +# CONFIG_ENCRYPTED_KEYS is not set +# CONFIG_KEYS_DEBUG_PROC_KEYS is not set +# CONFIG_SECURITY_DMESG_RESTRICT is not set +# CONFIG_SECURITY is not set +# CONFIG_SECURITYFS is not set +CONFIG_DEFAULT_SECURITY_DAC=y +CONFIG_DEFAULT_SECURITY="" +CONFIG_CRYPTO=y + +# +# Crypto core or helper +# +CONFIG_CRYPTO_ALGAPI=y +CONFIG_CRYPTO_ALGAPI2=y +CONFIG_CRYPTO_AEAD2=y +CONFIG_CRYPTO_BLKCIPHER=y +CONFIG_CRYPTO_BLKCIPHER2=y +CONFIG_CRYPTO_HASH=y +CONFIG_CRYPTO_HASH2=y +CONFIG_CRYPTO_RNG2=y +CONFIG_CRYPTO_PCOMP2=y +CONFIG_CRYPTO_MANAGER=y +CONFIG_CRYPTO_MANAGER2=y +# CONFIG_CRYPTO_USER is not set +CONFIG_CRYPTO_MANAGER_DISABLE_TESTS=y +# CONFIG_CRYPTO_GF128MUL is not set +# CONFIG_CRYPTO_NULL is not set +# CONFIG_CRYPTO_PCRYPT is not set +CONFIG_CRYPTO_WORKQUEUE=y +# CONFIG_CRYPTO_CRYPTD is not set +# CONFIG_CRYPTO_AUTHENC is not set +# CONFIG_CRYPTO_TEST is not set + +# +# Authenticated Encryption with Associated Data +# +# CONFIG_CRYPTO_CCM is not set +# CONFIG_CRYPTO_GCM is not set +# CONFIG_CRYPTO_SEQIV is not set + +# +# Block modes +# +CONFIG_CRYPTO_CBC=y +# CONFIG_CRYPTO_CTR is not set +# CONFIG_CRYPTO_CTS is not set +CONFIG_CRYPTO_ECB=y +# CONFIG_CRYPTO_LRW is not set +# CONFIG_CRYPTO_PCBC is not set +# CONFIG_CRYPTO_XTS is not set + +# +# Hash modes +# +# CONFIG_CRYPTO_CMAC is not set +CONFIG_CRYPTO_HMAC=y +# CONFIG_CRYPTO_XCBC is not set +# CONFIG_CRYPTO_VMAC is not set + +# +# Digest +# +# CONFIG_CRYPTO_CRC32C is not set +# CONFIG_CRYPTO_CRC32 is not set +# CONFIG_CRYPTO_GHASH is not set +CONFIG_CRYPTO_MD4=y +CONFIG_CRYPTO_MD5=y +CONFIG_CRYPTO_MICHAEL_MIC=y +# CONFIG_CRYPTO_RMD128 is not set +# CONFIG_CRYPTO_RMD160 is not set +# CONFIG_CRYPTO_RMD256 is not set +# CONFIG_CRYPTO_RMD320 is not set +# CONFIG_CRYPTO_SHA1 is not set +# CONFIG_CRYPTO_SHA1_ARM is not set +CONFIG_CRYPTO_SHA256=y +# CONFIG_CRYPTO_SHA512 is not set +# CONFIG_CRYPTO_TGR192 is not set +# CONFIG_CRYPTO_WP512 is not set + +# +# Ciphers +# +CONFIG_CRYPTO_AES=y +# CONFIG_CRYPTO_AES_ARM is not set +# CONFIG_CRYPTO_ANUBIS is not set +CONFIG_CRYPTO_ARC4=y +# CONFIG_CRYPTO_BLOWFISH is not set +# CONFIG_CRYPTO_CAMELLIA is not set +# CONFIG_CRYPTO_CAST5 is not set +# CONFIG_CRYPTO_CAST6 is not set +CONFIG_CRYPTO_DES=y +# CONFIG_CRYPTO_FCRYPT is not set +# CONFIG_CRYPTO_KHAZAD is not set +# CONFIG_CRYPTO_SALSA20 is not set +# CONFIG_CRYPTO_SEED is not set +# CONFIG_CRYPTO_SERPENT is not set +# CONFIG_CRYPTO_TEA is not set +# CONFIG_CRYPTO_TWOFISH is not set + +# +# Compression +# +# CONFIG_CRYPTO_DEFLATE is not set +# CONFIG_CRYPTO_ZLIB is not set +# CONFIG_CRYPTO_LZO is not set + +# +# Random Number Generation +# +# CONFIG_CRYPTO_ANSI_CPRNG is not set +# CONFIG_CRYPTO_USER_API_HASH is not set +# CONFIG_CRYPTO_USER_API_SKCIPHER is not set +CONFIG_CRYPTO_HW=y +# CONFIG_ASYMMETRIC_KEY_TYPE is not set +# CONFIG_BINARY_PRINTF is not set + +# +# Library routines +# +CONFIG_BITREVERSE=y +CONFIG_GENERIC_STRNCPY_FROM_USER=y +CONFIG_GENERIC_STRNLEN_USER=y +CONFIG_GENERIC_PCI_IOMAP=y +CONFIG_GENERIC_IO=y +CONFIG_CRC_CCITT=y +CONFIG_CRC16=m +# CONFIG_CRC_T10DIF is not set +CONFIG_CRC_ITU_T=y +CONFIG_CRC32=y +# CONFIG_CRC32_SELFTEST is not set +CONFIG_CRC32_SLICEBY8=y +# CONFIG_CRC32_SLICEBY4 is not set +# CONFIG_CRC32_SARWATE is not set +# CONFIG_CRC32_BIT is not set +# CONFIG_CRC7 is not set +# CONFIG_LIBCRC32C is not set +# CONFIG_CRC8 is not set +CONFIG_ZLIB_INFLATE=y +CONFIG_ZLIB_DEFLATE=y +CONFIG_LZO_COMPRESS=y +CONFIG_LZO_DECOMPRESS=y +CONFIG_XZ_DEC=y +CONFIG_XZ_DEC_X86=y +CONFIG_XZ_DEC_POWERPC=y +CONFIG_XZ_DEC_IA64=y +CONFIG_XZ_DEC_ARM=y +CONFIG_XZ_DEC_ARMTHUMB=y +CONFIG_XZ_DEC_SPARC=y +CONFIG_XZ_DEC_BCJ=y +# CONFIG_XZ_DEC_TEST is not set +CONFIG_HAS_IOMEM=y +CONFIG_HAS_IOPORT=y +CONFIG_HAS_DMA=y +CONFIG_CPU_RMAP=y +CONFIG_DQL=y +CONFIG_NLATTR=y +CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE=y +CONFIG_AVERAGE=y +# CONFIG_CORDIC is not set +# CONFIG_DDR is not set +CONFIG_OID_REGISTRY=y +# CONFIG_VIRTUALIZATION is not set From 3fd67c93857443e84569a0ed091e4f80139d45d7 Mon Sep 17 00:00:00 2001 From: Igor Zalatov Date: Thu, 22 Apr 2021 09:41:55 +0300 Subject: [PATCH 4/5] Add overlayfs patch --- .../xm530_overlayfs.v18-3.10-rc7.patch | 3285 +++++++++++++++++ 1 file changed, 3285 insertions(+) create mode 100644 br-ext-chip-xiongmai/board/xm530/kernel/patches/xm530_overlayfs.v18-3.10-rc7.patch diff --git a/br-ext-chip-xiongmai/board/xm530/kernel/patches/xm530_overlayfs.v18-3.10-rc7.patch b/br-ext-chip-xiongmai/board/xm530/kernel/patches/xm530_overlayfs.v18-3.10-rc7.patch new file mode 100644 index 00000000..c491b736 --- /dev/null +++ b/br-ext-chip-xiongmai/board/xm530/kernel/patches/xm530_overlayfs.v18-3.10-rc7.patch @@ -0,0 +1,3285 @@ +diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking +index 0706d32..4331290 100644 +--- a/Documentation/filesystems/Locking ++++ b/Documentation/filesystems/Locking +@@ -66,6 +66,7 @@ prototypes: + int (*atomic_open)(struct inode *, struct dentry *, + struct file *, unsigned open_flag, + umode_t create_mode, int *opened); ++ int (*dentry_open)(struct dentry *, struct file *, const struct cred *); + + locking rules: + all may block +@@ -93,6 +94,7 @@ removexattr: yes + fiemap: no + update_time: no + atomic_open: yes ++dentry_open: no + + Additionally, ->rmdir(), ->unlink() and ->rename() have ->i_mutex on + victim. +diff --git a/Documentation/filesystems/overlayfs.txt b/Documentation/filesystems/overlayfs.txt +new file mode 100644 +index 0000000..00dbab0 +--- /dev/null ++++ b/Documentation/filesystems/overlayfs.txt +@@ -0,0 +1,199 @@ ++Written by: Neil Brown ++ ++Overlay Filesystem ++================== ++ ++This document describes a prototype for a new approach to providing ++overlay-filesystem functionality in Linux (sometimes referred to as ++union-filesystems). An overlay-filesystem tries to present a ++filesystem which is the result over overlaying one filesystem on top ++of the other. ++ ++The result will inevitably fail to look exactly like a normal ++filesystem for various technical reasons. The expectation is that ++many use cases will be able to ignore these differences. ++ ++This approach is 'hybrid' because the objects that appear in the ++filesystem do not all appear to belong to that filesystem. In many ++cases an object accessed in the union will be indistinguishable ++from accessing the corresponding object from the original filesystem. ++This is most obvious from the 'st_dev' field returned by stat(2). ++ ++While directories will report an st_dev from the overlay-filesystem, ++all non-directory objects will report an st_dev from the lower or ++upper filesystem that is providing the object. Similarly st_ino will ++only be unique when combined with st_dev, and both of these can change ++over the lifetime of a non-directory object. Many applications and ++tools ignore these values and will not be affected. ++ ++Upper and Lower ++--------------- ++ ++An overlay filesystem combines two filesystems - an 'upper' filesystem ++and a 'lower' filesystem. When a name exists in both filesystems, the ++object in the 'upper' filesystem is visible while the object in the ++'lower' filesystem is either hidden or, in the case of directories, ++merged with the 'upper' object. ++ ++It would be more correct to refer to an upper and lower 'directory ++tree' rather than 'filesystem' as it is quite possible for both ++directory trees to be in the same filesystem and there is no ++requirement that the root of a filesystem be given for either upper or ++lower. ++ ++The lower filesystem can be any filesystem supported by Linux and does ++not need to be writable. The lower filesystem can even be another ++overlayfs. The upper filesystem will normally be writable and if it ++is it must support the creation of trusted.* extended attributes, and ++must provide valid d_type in readdir responses, at least for symbolic ++links - so NFS is not suitable. ++ ++A read-only overlay of two read-only filesystems may use any ++filesystem type. ++ ++Directories ++----------- ++ ++Overlaying mainly involves directories. If a given name appears in both ++upper and lower filesystems and refers to a non-directory in either, ++then the lower object is hidden - the name refers only to the upper ++object. ++ ++Where both upper and lower objects are directories, a merged directory ++is formed. ++ ++At mount time, the two directories given as mount options are combined ++into a merged directory: ++ ++ mount -t overlayfs overlayfs -olowerdir=/lower,upperdir=/upper /overlay ++ ++Then whenever a lookup is requested in such a merged directory, the ++lookup is performed in each actual directory and the combined result ++is cached in the dentry belonging to the overlay filesystem. If both ++actual lookups find directories, both are stored and a merged ++directory is created, otherwise only one is stored: the upper if it ++exists, else the lower. ++ ++Only the lists of names from directories are merged. Other content ++such as metadata and extended attributes are reported for the upper ++directory only. These attributes of the lower directory are hidden. ++ ++whiteouts and opaque directories ++-------------------------------- ++ ++In order to support rm and rmdir without changing the lower ++filesystem, an overlay filesystem needs to record in the upper filesystem ++that files have been removed. This is done using whiteouts and opaque ++directories (non-directories are always opaque). ++ ++The overlay filesystem uses extended attributes with a ++"trusted.overlay." prefix to record these details. ++ ++A whiteout is created as a symbolic link with target ++"(overlay-whiteout)" and with xattr "trusted.overlay.whiteout" set to "y". ++When a whiteout is found in the upper level of a merged directory, any ++matching name in the lower level is ignored, and the whiteout itself ++is also hidden. ++ ++A directory is made opaque by setting the xattr "trusted.overlay.opaque" ++to "y". Where the upper filesystem contains an opaque directory, any ++directory in the lower filesystem with the same name is ignored. ++ ++readdir ++------- ++ ++When a 'readdir' request is made on a merged directory, the upper and ++lower directories are each read and the name lists merged in the ++obvious way (upper is read first, then lower - entries that already ++exist are not re-added). This merged name list is cached in the ++'struct file' and so remains as long as the file is kept open. If the ++directory is opened and read by two processes at the same time, they ++will each have separate caches. A seekdir to the start of the ++directory (offset 0) followed by a readdir will cause the cache to be ++discarded and rebuilt. ++ ++This means that changes to the merged directory do not appear while a ++directory is being read. This is unlikely to be noticed by many ++programs. ++ ++seek offsets are assigned sequentially when the directories are read. ++Thus if ++ - read part of a directory ++ - remember an offset, and close the directory ++ - re-open the directory some time later ++ - seek to the remembered offset ++ ++there may be little correlation between the old and new locations in ++the list of filenames, particularly if anything has changed in the ++directory. ++ ++Readdir on directories that are not merged is simply handled by the ++underlying directory (upper or lower). ++ ++ ++Non-directories ++--------------- ++ ++Objects that are not directories (files, symlinks, device-special ++files etc.) are presented either from the upper or lower filesystem as ++appropriate. When a file in the lower filesystem is accessed in a way ++the requires write-access, such as opening for write access, changing ++some metadata etc., the file is first copied from the lower filesystem ++to the upper filesystem (copy_up). Note that creating a hard-link ++also requires copy_up, though of course creation of a symlink does ++not. ++ ++The copy_up may turn out to be unnecessary, for example if the file is ++opened for read-write but the data is not modified. ++ ++The copy_up process first makes sure that the containing directory ++exists in the upper filesystem - creating it and any parents as ++necessary. It then creates the object with the same metadata (owner, ++mode, mtime, symlink-target etc.) and then if the object is a file, the ++data is copied from the lower to the upper filesystem. Finally any ++extended attributes are copied up. ++ ++Once the copy_up is complete, the overlay filesystem simply ++provides direct access to the newly created file in the upper ++filesystem - future operations on the file are barely noticed by the ++overlay filesystem (though an operation on the name of the file such as ++rename or unlink will of course be noticed and handled). ++ ++ ++Non-standard behavior ++--------------------- ++ ++The copy_up operation essentially creates a new, identical file and ++moves it over to the old name. The new file may be on a different ++filesystem, so both st_dev and st_ino of the file may change. ++ ++Any open files referring to this inode will access the old data and ++metadata. Similarly any file locks obtained before copy_up will not ++apply to the copied up file. ++ ++On a file opened with O_RDONLY fchmod(2), fchown(2), futimesat(2) and ++fsetxattr(2) will fail with EROFS. ++ ++If a file with multiple hard links is copied up, then this will ++"break" the link. Changes will not be propagated to other names ++referring to the same inode. ++ ++Symlinks in /proc/PID/ and /proc/PID/fd which point to a non-directory ++object in overlayfs will not contain valid absolute paths, only ++relative paths leading up to the filesystem's root. This will be ++fixed in the future. ++ ++Some operations are not atomic, for example a crash during copy_up or ++rename will leave the filesystem in an inconsistent state. This will ++be addressed in the future. ++ ++Changes to underlying filesystems ++--------------------------------- ++ ++Offline changes, when the overlay is not mounted, are allowed to either ++the upper or the lower trees. ++ ++Changes to the underlying filesystems while part of a mounted overlay ++filesystem are not allowed. If the underlying filesystem is changed, ++the behavior of the overlay is undefined, though it will not result in ++a crash or deadlock. +diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt +index bc4b06b..f64a4d1 100644 +--- a/Documentation/filesystems/vfs.txt ++++ b/Documentation/filesystems/vfs.txt +@@ -362,6 +362,7 @@ struct inode_operations { + int (*atomic_open)(struct inode *, struct dentry *, + struct file *, unsigned open_flag, + umode_t create_mode, int *opened); ++ int (*dentry_open)(struct dentry *, struct file *, const struct cred *); + }; + + Again, all methods are called without any locks being held, unless +@@ -681,6 +682,12 @@ struct address_space_operations { + but instead uses bmap to find out where the blocks in the file + are and uses those addresses directly. + ++ dentry_open: this is an alternative to f_op->open(), the difference is that ++ this method may open a file not necessarily originating from the same ++ filesystem as the one i_op->open() was called on. It may be ++ useful for stacking filesystems which want to allow native I/O directly ++ on underlying files. ++ + + invalidatepage: If a page has PagePrivate set, then invalidatepage + will be called when part or all of the page is to be removed +diff --git a/MAINTAINERS b/MAINTAINERS +index 5be702c..8911997 100644 +--- a/MAINTAINERS ++++ b/MAINTAINERS +@@ -6019,6 +6019,13 @@ F: drivers/scsi/osd/ + F: include/scsi/osd_* + F: fs/exofs/ + ++OVERLAYFS FILESYSTEM ++M: Miklos Szeredi ++L: linux-fsdevel@vger.kernel.org ++S: Supported ++F: fs/overlayfs/* ++F: Documentation/filesystems/overlayfs.txt ++ + P54 WIRELESS DRIVER + M: Christian Lamparter + L: linux-wireless@vger.kernel.org +diff --git a/fs/Kconfig b/fs/Kconfig +index c229f82..60291d5 100644 +--- a/fs/Kconfig ++++ b/fs/Kconfig +@@ -67,6 +67,7 @@ source "fs/quota/Kconfig" + + source "fs/autofs4/Kconfig" + source "fs/fuse/Kconfig" ++source "fs/overlayfs/Kconfig" + + config GENERIC_ACL + bool +diff --git a/fs/Makefile b/fs/Makefile +index 4fe6df3..9506dd7 100644 +--- a/fs/Makefile ++++ b/fs/Makefile +@@ -105,6 +105,7 @@ obj-$(CONFIG_QNX6FS_FS) += qnx6/ + obj-$(CONFIG_AUTOFS4_FS) += autofs4/ + obj-$(CONFIG_ADFS_FS) += adfs/ + obj-$(CONFIG_FUSE_FS) += fuse/ ++obj-$(CONFIG_OVERLAYFS_FS) += overlayfs/ + obj-$(CONFIG_UDF_FS) += udf/ + obj-$(CONFIG_SUN_OPENPROMFS) += openpromfs/ + obj-$(CONFIG_OMFS_FS) += omfs/ +diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c +index e924cf4..8b0957e 100644 +--- a/fs/ecryptfs/main.c ++++ b/fs/ecryptfs/main.c +@@ -567,6 +567,13 @@ static struct dentry *ecryptfs_mount(struct file_system_type *fs_type, int flags + s->s_maxbytes = path.dentry->d_sb->s_maxbytes; + s->s_blocksize = path.dentry->d_sb->s_blocksize; + s->s_magic = ECRYPTFS_SUPER_MAGIC; ++ s->s_stack_depth = path.dentry->d_sb->s_stack_depth + 1; ++ ++ rc = -EINVAL; ++ if (s->s_stack_depth > FILESYSTEM_MAX_STACK_DEPTH) { ++ pr_err("eCryptfs: maximum fs stacking depth exceeded\n"); ++ goto out_free; ++ } + + inode = ecryptfs_get_inode(path.dentry->d_inode, s); + rc = PTR_ERR(inode); +diff --git a/fs/internal.h b/fs/internal.h +index 6812158..6c9ec69 100644 +--- a/fs/internal.h ++++ b/fs/internal.h +@@ -42,11 +42,6 @@ static inline int __sync_blockdev(struct block_device *bdev, int wait) + extern void __init chrdev_init(void); + + /* +- * namei.c +- */ +-extern int __inode_permission(struct inode *, int); +- +-/* + * namespace.c + */ + extern int copy_mount_options(const void __user *, unsigned long *); +@@ -132,12 +127,6 @@ extern struct dentry *__d_alloc(struct super_block *, const struct qstr *); + extern ssize_t __kernel_write(struct file *, const char *, size_t, loff_t *); + + /* +- * splice.c +- */ +-extern long do_splice_direct(struct file *in, loff_t *ppos, struct file *out, +- loff_t *opos, size_t len, unsigned int flags); +- +-/* + * pipe.c + */ + extern const struct file_operations pipefifo_fops; +diff --git a/fs/namei.c b/fs/namei.c +index 9ed9361..df058f5 100644 +--- a/fs/namei.c ++++ b/fs/namei.c +@@ -402,6 +402,7 @@ int __inode_permission(struct inode *inode, int mask) + + return security_inode_permission(inode, mask); + } ++EXPORT_SYMBOL(__inode_permission); + + /** + * sb_permission - Check superblock-level permissions +@@ -2867,9 +2868,12 @@ finish_open_created: + error = may_open(&nd->path, acc_mode, open_flag); + if (error) + goto out; +- file->f_path.mnt = nd->path.mnt; +- error = finish_open(file, nd->path.dentry, NULL, opened); +- if (error) { ++ ++ BUG_ON(*opened & FILE_OPENED); /* once it's opened, it's opened */ ++ error = vfs_open(&nd->path, file, current_cred()); ++ if (!error) { ++ *opened |= FILE_OPENED; ++ } else { + if (error == -EOPENSTALE) + goto stale_open; + goto out; +diff --git a/fs/namespace.c b/fs/namespace.c +index 7b1ca9b..455e6ea 100644 +--- a/fs/namespace.c ++++ b/fs/namespace.c +@@ -1442,6 +1442,33 @@ void drop_collected_mounts(struct vfsmount *mnt) + namespace_unlock(); + } + ++/** ++ * clone_private_mount - create a private clone of a path ++ * ++ * This creates a new vfsmount, which will be the clone of @path. The new will ++ * not be attached anywhere in the namespace and will be private (i.e. changes ++ * to the originating mount won't be propagated into this). ++ * ++ * Release with mntput(). ++ */ ++struct vfsmount *clone_private_mount(struct path *path) ++{ ++ struct mount *old_mnt = real_mount(path->mnt); ++ struct mount *new_mnt; ++ ++ if (IS_MNT_UNBINDABLE(old_mnt)) ++ return ERR_PTR(-EINVAL); ++ ++ down_read(&namespace_sem); ++ new_mnt = clone_mnt(old_mnt, path->dentry, CL_PRIVATE); ++ up_read(&namespace_sem); ++ if (IS_ERR(new_mnt)) ++ return ERR_CAST(new_mnt); ++ ++ return &new_mnt->mnt; ++} ++EXPORT_SYMBOL_GPL(clone_private_mount); ++ + int iterate_mounts(int (*f)(struct vfsmount *, void *), void *arg, + struct vfsmount *root) + { +diff --git a/fs/open.c b/fs/open.c +index 8c74100..ab07bc9 100644 +--- a/fs/open.c ++++ b/fs/open.c +@@ -800,8 +800,7 @@ struct file *dentry_open(const struct path *path, int flags, + f = get_empty_filp(); + if (!IS_ERR(f)) { + f->f_flags = flags; +- f->f_path = *path; +- error = do_dentry_open(f, NULL, cred); ++ error = vfs_open(path, f, cred); + if (!error) { + /* from now on we need fput() to dispose of f */ + error = open_check_o_direct(f); +@@ -818,6 +817,26 @@ struct file *dentry_open(const struct path *path, int flags, + } + EXPORT_SYMBOL(dentry_open); + ++/** ++ * vfs_open - open the file at the given path ++ * @path: path to open ++ * @filp: newly allocated file with f_flag initialized ++ * @cred: credentials to use ++ */ ++int vfs_open(const struct path *path, struct file *filp, ++ const struct cred *cred) ++{ ++ struct inode *inode = path->dentry->d_inode; ++ ++ if (inode->i_op->dentry_open) ++ return inode->i_op->dentry_open(path->dentry, filp, cred); ++ else { ++ filp->f_path = *path; ++ return do_dentry_open(filp, NULL, cred); ++ } ++} ++EXPORT_SYMBOL(vfs_open); ++ + static inline int build_open_flags(int flags, umode_t mode, struct open_flags *op) + { + int lookup_flags = 0; +diff --git a/fs/overlayfs/Kconfig b/fs/overlayfs/Kconfig +new file mode 100644 +index 0000000..e601259 +--- /dev/null ++++ b/fs/overlayfs/Kconfig +@@ -0,0 +1,10 @@ ++config OVERLAYFS_FS ++ tristate "Overlay filesystem support" ++ help ++ An overlay filesystem combines two filesystems - an 'upper' filesystem ++ and a 'lower' filesystem. When a name exists in both filesystems, the ++ object in the 'upper' filesystem is visible while the object in the ++ 'lower' filesystem is either hidden or, in the case of directories, ++ merged with the 'upper' object. ++ ++ For more information see Documentation/filesystems/overlayfs.txt +diff --git a/fs/overlayfs/Makefile b/fs/overlayfs/Makefile +new file mode 100644 +index 0000000..8f91889 +--- /dev/null ++++ b/fs/overlayfs/Makefile +@@ -0,0 +1,7 @@ ++# ++# Makefile for the overlay filesystem. ++# ++ ++obj-$(CONFIG_OVERLAYFS_FS) += overlayfs.o ++ ++overlayfs-objs := super.o inode.o dir.o readdir.o copy_up.o +diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c +new file mode 100644 +index 0000000..7b9fb6d +--- /dev/null ++++ b/fs/overlayfs/copy_up.c +@@ -0,0 +1,387 @@ ++/* ++ * ++ * Copyright (C) 2011 Novell Inc. ++ * ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License version 2 as published by ++ * the Free Software Foundation. ++ */ ++ ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include "overlayfs.h" ++ ++#define OVL_COPY_UP_CHUNK_SIZE (1 << 20) ++ ++static int ovl_copy_up_xattr(struct dentry *old, struct dentry *new) ++{ ++ ssize_t list_size, size; ++ char *buf, *name, *value; ++ int error; ++ ++ if (!old->d_inode->i_op->getxattr || ++ !new->d_inode->i_op->getxattr) ++ return 0; ++ ++ list_size = vfs_listxattr(old, NULL, 0); ++ if (list_size <= 0) { ++ if (list_size == -EOPNOTSUPP) ++ return 0; ++ return list_size; ++ } ++ ++ buf = kzalloc(list_size, GFP_KERNEL); ++ if (!buf) ++ return -ENOMEM; ++ ++ error = -ENOMEM; ++ value = kmalloc(XATTR_SIZE_MAX, GFP_KERNEL); ++ if (!value) ++ goto out; ++ ++ list_size = vfs_listxattr(old, buf, list_size); ++ if (list_size <= 0) { ++ error = list_size; ++ goto out_free_value; ++ } ++ ++ for (name = buf; name < (buf + list_size); name += strlen(name) + 1) { ++ size = vfs_getxattr(old, name, value, XATTR_SIZE_MAX); ++ if (size <= 0) { ++ error = size; ++ goto out_free_value; ++ } ++ error = vfs_setxattr(new, name, value, size, 0); ++ if (error) ++ goto out_free_value; ++ } ++ ++out_free_value: ++ kfree(value); ++out: ++ kfree(buf); ++ return error; ++} ++ ++static int ovl_copy_up_data(struct path *old, struct path *new, loff_t len) ++{ ++ struct file *old_file; ++ struct file *new_file; ++ loff_t old_pos = 0; ++ loff_t new_pos = 0; ++ int error = 0; ++ ++ if (len == 0) ++ return 0; ++ ++ old_file = ovl_path_open(old, O_RDONLY); ++ if (IS_ERR(old_file)) ++ return PTR_ERR(old_file); ++ ++ new_file = ovl_path_open(new, O_WRONLY); ++ if (IS_ERR(new_file)) { ++ error = PTR_ERR(new_file); ++ goto out_fput; ++ } ++ ++ /* FIXME: copy up sparse files efficiently */ ++ while (len) { ++ size_t this_len = OVL_COPY_UP_CHUNK_SIZE; ++ long bytes; ++ ++ if (len < this_len) ++ this_len = len; ++ ++ if (signal_pending_state(TASK_KILLABLE, current)) { ++ error = -EINTR; ++ break; ++ } ++ ++ bytes = do_splice_direct(old_file, &old_pos, ++ new_file, &new_pos, ++ this_len, SPLICE_F_MOVE); ++ if (bytes <= 0) { ++ error = bytes; ++ break; ++ } ++ ++ len -= bytes; ++ } ++ ++ fput(new_file); ++out_fput: ++ fput(old_file); ++ return error; ++} ++ ++static char *ovl_read_symlink(struct dentry *realdentry) ++{ ++ int res; ++ char *buf; ++ struct inode *inode = realdentry->d_inode; ++ mm_segment_t old_fs; ++ ++ res = -EINVAL; ++ if (!inode->i_op->readlink) ++ goto err; ++ ++ res = -ENOMEM; ++ buf = (char *) __get_free_page(GFP_KERNEL); ++ if (!buf) ++ goto err; ++ ++ old_fs = get_fs(); ++ set_fs(get_ds()); ++ /* The cast to a user pointer is valid due to the set_fs() */ ++ res = inode->i_op->readlink(realdentry, ++ (char __user *)buf, PAGE_SIZE - 1); ++ set_fs(old_fs); ++ if (res < 0) { ++ free_page((unsigned long) buf); ++ goto err; ++ } ++ buf[res] = '\0'; ++ ++ return buf; ++ ++err: ++ return ERR_PTR(res); ++} ++ ++static int ovl_set_timestamps(struct dentry *upperdentry, struct kstat *stat) ++{ ++ struct iattr attr = { ++ .ia_valid = ++ ATTR_ATIME | ATTR_MTIME | ATTR_ATIME_SET | ATTR_MTIME_SET, ++ .ia_atime = stat->atime, ++ .ia_mtime = stat->mtime, ++ }; ++ ++ return notify_change(upperdentry, &attr); ++} ++ ++static int ovl_set_mode(struct dentry *upperdentry, umode_t mode) ++{ ++ struct iattr attr = { ++ .ia_valid = ATTR_MODE, ++ .ia_mode = mode, ++ }; ++ ++ return notify_change(upperdentry, &attr); ++} ++ ++static int ovl_copy_up_locked(struct dentry *upperdir, struct dentry *dentry, ++ struct path *lowerpath, struct kstat *stat, ++ const char *link) ++{ ++ int err; ++ struct path newpath; ++ umode_t mode = stat->mode; ++ ++ /* Can't properly set mode on creation because of the umask */ ++ stat->mode &= S_IFMT; ++ ++ ovl_path_upper(dentry, &newpath); ++ WARN_ON(newpath.dentry); ++ newpath.dentry = ovl_upper_create(upperdir, dentry, stat, link); ++ if (IS_ERR(newpath.dentry)) ++ return PTR_ERR(newpath.dentry); ++ ++ if (S_ISREG(stat->mode)) { ++ err = ovl_copy_up_data(lowerpath, &newpath, stat->size); ++ if (err) ++ goto err_remove; ++ } ++ ++ err = ovl_copy_up_xattr(lowerpath->dentry, newpath.dentry); ++ if (err) ++ goto err_remove; ++ ++ mutex_lock(&newpath.dentry->d_inode->i_mutex); ++ if (!S_ISLNK(stat->mode)) ++ err = ovl_set_mode(newpath.dentry, mode); ++ if (!err) ++ err = ovl_set_timestamps(newpath.dentry, stat); ++ mutex_unlock(&newpath.dentry->d_inode->i_mutex); ++ if (err) ++ goto err_remove; ++ ++ ovl_dentry_update(dentry, newpath.dentry); ++ ++ /* ++ * Easiest way to get rid of the lower dentry reference is to ++ * drop this dentry. This is neither needed nor possible for ++ * directories. ++ */ ++ if (!S_ISDIR(stat->mode)) ++ d_drop(dentry); ++ ++ return 0; ++ ++err_remove: ++ if (S_ISDIR(stat->mode)) ++ vfs_rmdir(upperdir->d_inode, newpath.dentry); ++ else ++ vfs_unlink(upperdir->d_inode, newpath.dentry); ++ ++ dput(newpath.dentry); ++ ++ return err; ++} ++ ++/* ++ * Copy up a single dentry ++ * ++ * Directory renames only allowed on "pure upper" (already created on ++ * upper filesystem, never copied up). Directories which are on lower or ++ * are merged may not be renamed. For these -EXDEV is returned and ++ * userspace has to deal with it. This means, when copying up a ++ * directory we can rely on it and ancestors being stable. ++ * ++ * Non-directory renames start with copy up of source if necessary. The ++ * actual rename will only proceed once the copy up was successful. Copy ++ * up uses upper parent i_mutex for exclusion. Since rename can change ++ * d_parent it is possible that the copy up will lock the old parent. At ++ * that point the file will have already been copied up anyway. ++ */ ++static int ovl_copy_up_one(struct dentry *parent, struct dentry *dentry, ++ struct path *lowerpath, struct kstat *stat) ++{ ++ int err; ++ struct kstat pstat; ++ struct path parentpath; ++ struct dentry *upperdir; ++ const struct cred *old_cred; ++ struct cred *override_cred; ++ char *link = NULL; ++ ++ ovl_path_upper(parent, &parentpath); ++ upperdir = parentpath.dentry; ++ ++ err = vfs_getattr(&parentpath, &pstat); ++ if (err) ++ return err; ++ ++ if (S_ISLNK(stat->mode)) { ++ link = ovl_read_symlink(lowerpath->dentry); ++ if (IS_ERR(link)) ++ return PTR_ERR(link); ++ } ++ ++ err = -ENOMEM; ++ override_cred = prepare_creds(); ++ if (!override_cred) ++ goto out_free_link; ++ ++ override_cred->fsuid = stat->uid; ++ override_cred->fsgid = stat->gid; ++ /* ++ * CAP_SYS_ADMIN for copying up extended attributes ++ * CAP_DAC_OVERRIDE for create ++ * CAP_FOWNER for chmod, timestamp update ++ * CAP_FSETID for chmod ++ * CAP_MKNOD for mknod ++ */ ++ cap_raise(override_cred->cap_effective, CAP_SYS_ADMIN); ++ cap_raise(override_cred->cap_effective, CAP_DAC_OVERRIDE); ++ cap_raise(override_cred->cap_effective, CAP_FOWNER); ++ cap_raise(override_cred->cap_effective, CAP_FSETID); ++ cap_raise(override_cred->cap_effective, CAP_MKNOD); ++ old_cred = override_creds(override_cred); ++ ++ mutex_lock_nested(&upperdir->d_inode->i_mutex, I_MUTEX_PARENT); ++ if (ovl_path_type(dentry) != OVL_PATH_LOWER) { ++ err = 0; ++ } else { ++ err = ovl_copy_up_locked(upperdir, dentry, lowerpath, ++ stat, link); ++ if (!err) { ++ /* Restore timestamps on parent (best effort) */ ++ ovl_set_timestamps(upperdir, &pstat); ++ } ++ } ++ ++ mutex_unlock(&upperdir->d_inode->i_mutex); ++ ++ revert_creds(old_cred); ++ put_cred(override_cred); ++ ++out_free_link: ++ if (link) ++ free_page((unsigned long) link); ++ ++ return err; ++} ++ ++int ovl_copy_up(struct dentry *dentry) ++{ ++ int err; ++ ++ err = 0; ++ while (!err) { ++ struct dentry *next; ++ struct dentry *parent; ++ struct path lowerpath; ++ struct kstat stat; ++ enum ovl_path_type type = ovl_path_type(dentry); ++ ++ if (type != OVL_PATH_LOWER) ++ break; ++ ++ next = dget(dentry); ++ /* find the topmost dentry not yet copied up */ ++ for (;;) { ++ parent = dget_parent(next); ++ ++ type = ovl_path_type(parent); ++ if (type != OVL_PATH_LOWER) ++ break; ++ ++ dput(next); ++ next = parent; ++ } ++ ++ ovl_path_lower(next, &lowerpath); ++ err = vfs_getattr(&lowerpath, &stat); ++ if (!err) ++ err = ovl_copy_up_one(parent, next, &lowerpath, &stat); ++ ++ dput(parent); ++ dput(next); ++ } ++ ++ return err; ++} ++ ++/* Optimize by not copying up the file first and truncating later */ ++int ovl_copy_up_truncate(struct dentry *dentry, loff_t size) ++{ ++ int err; ++ struct kstat stat; ++ struct path lowerpath; ++ struct dentry *parent = dget_parent(dentry); ++ ++ err = ovl_copy_up(parent); ++ if (err) ++ goto out_dput_parent; ++ ++ ovl_path_lower(dentry, &lowerpath); ++ err = vfs_getattr(&lowerpath, &stat); ++ if (err) ++ goto out_dput_parent; ++ ++ if (size < stat.size) ++ stat.size = size; ++ ++ err = ovl_copy_up_one(parent, dentry, &lowerpath, &stat); ++ ++out_dput_parent: ++ dput(parent); ++ return err; ++} +diff --git a/fs/overlayfs/dir.c b/fs/overlayfs/dir.c +new file mode 100644 +index 0000000..f4969c1 +--- /dev/null ++++ b/fs/overlayfs/dir.c +@@ -0,0 +1,605 @@ ++/* ++ * ++ * Copyright (C) 2011 Novell Inc. ++ * ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License version 2 as published by ++ * the Free Software Foundation. ++ */ ++ ++#include ++#include ++#include ++#include ++#include ++#include "overlayfs.h" ++ ++static const char *ovl_whiteout_symlink = "(overlay-whiteout)"; ++ ++static int ovl_whiteout(struct dentry *upperdir, struct dentry *dentry) ++{ ++ int err; ++ struct dentry *newdentry; ++ const struct cred *old_cred; ++ struct cred *override_cred; ++ ++ /* FIXME: recheck lower dentry to see if whiteout is really needed */ ++ ++ err = -ENOMEM; ++ override_cred = prepare_creds(); ++ if (!override_cred) ++ goto out; ++ ++ /* ++ * CAP_SYS_ADMIN for setxattr ++ * CAP_DAC_OVERRIDE for symlink creation ++ * CAP_FOWNER for unlink in sticky directory ++ */ ++ cap_raise(override_cred->cap_effective, CAP_SYS_ADMIN); ++ cap_raise(override_cred->cap_effective, CAP_DAC_OVERRIDE); ++ cap_raise(override_cred->cap_effective, CAP_FOWNER); ++ override_cred->fsuid = GLOBAL_ROOT_UID; ++ override_cred->fsgid = GLOBAL_ROOT_GID; ++ old_cred = override_creds(override_cred); ++ ++ newdentry = lookup_one_len(dentry->d_name.name, upperdir, ++ dentry->d_name.len); ++ err = PTR_ERR(newdentry); ++ if (IS_ERR(newdentry)) ++ goto out_put_cred; ++ ++ /* Just been removed within the same locked region */ ++ WARN_ON(newdentry->d_inode); ++ ++ err = vfs_symlink(upperdir->d_inode, newdentry, ovl_whiteout_symlink); ++ if (err) ++ goto out_dput; ++ ++ ovl_dentry_version_inc(dentry->d_parent); ++ ++ err = vfs_setxattr(newdentry, ovl_whiteout_xattr, "y", 1, 0); ++ if (err) ++ vfs_unlink(upperdir->d_inode, newdentry); ++ ++out_dput: ++ dput(newdentry); ++out_put_cred: ++ revert_creds(old_cred); ++ put_cred(override_cred); ++out: ++ if (err) { ++ /* ++ * There's no way to recover from failure to whiteout. ++ * What should we do? Log a big fat error and... ? ++ */ ++ pr_err("overlayfs: ERROR - failed to whiteout '%s'\n", ++ dentry->d_name.name); ++ } ++ ++ return err; ++} ++ ++static struct dentry *ovl_lookup_create(struct dentry *upperdir, ++ struct dentry *template) ++{ ++ int err; ++ struct dentry *newdentry; ++ struct qstr *name = &template->d_name; ++ ++ newdentry = lookup_one_len(name->name, upperdir, name->len); ++ if (IS_ERR(newdentry)) ++ return newdentry; ++ ++ if (newdentry->d_inode) { ++ const struct cred *old_cred; ++ struct cred *override_cred; ++ ++ /* No need to check whiteout if lower parent is non-existent */ ++ err = -EEXIST; ++ if (!ovl_dentry_lower(template->d_parent)) ++ goto out_dput; ++ ++ if (!S_ISLNK(newdentry->d_inode->i_mode)) ++ goto out_dput; ++ ++ err = -ENOMEM; ++ override_cred = prepare_creds(); ++ if (!override_cred) ++ goto out_dput; ++ ++ /* ++ * CAP_SYS_ADMIN for getxattr ++ * CAP_FOWNER for unlink in sticky directory ++ */ ++ cap_raise(override_cred->cap_effective, CAP_SYS_ADMIN); ++ cap_raise(override_cred->cap_effective, CAP_FOWNER); ++ old_cred = override_creds(override_cred); ++ ++ err = -EEXIST; ++ if (ovl_is_whiteout(newdentry)) ++ err = vfs_unlink(upperdir->d_inode, newdentry); ++ ++ revert_creds(old_cred); ++ put_cred(override_cred); ++ if (err) ++ goto out_dput; ++ ++ dput(newdentry); ++ newdentry = lookup_one_len(name->name, upperdir, name->len); ++ if (IS_ERR(newdentry)) { ++ ovl_whiteout(upperdir, template); ++ return newdentry; ++ } ++ ++ /* ++ * Whiteout just been successfully removed, parent ++ * i_mutex is still held, there's no way the lookup ++ * could return positive. ++ */ ++ WARN_ON(newdentry->d_inode); ++ } ++ ++ return newdentry; ++ ++out_dput: ++ dput(newdentry); ++ return ERR_PTR(err); ++} ++ ++struct dentry *ovl_upper_create(struct dentry *upperdir, struct dentry *dentry, ++ struct kstat *stat, const char *link) ++{ ++ int err; ++ struct dentry *newdentry; ++ struct inode *dir = upperdir->d_inode; ++ ++ newdentry = ovl_lookup_create(upperdir, dentry); ++ if (IS_ERR(newdentry)) ++ goto out; ++ ++ switch (stat->mode & S_IFMT) { ++ case S_IFREG: ++ err = vfs_create(dir, newdentry, stat->mode, NULL); ++ break; ++ ++ case S_IFDIR: ++ err = vfs_mkdir(dir, newdentry, stat->mode); ++ break; ++ ++ case S_IFCHR: ++ case S_IFBLK: ++ case S_IFIFO: ++ case S_IFSOCK: ++ err = vfs_mknod(dir, newdentry, stat->mode, stat->rdev); ++ break; ++ ++ case S_IFLNK: ++ err = vfs_symlink(dir, newdentry, link); ++ break; ++ ++ default: ++ err = -EPERM; ++ } ++ if (err) { ++ if (ovl_dentry_is_opaque(dentry)) ++ ovl_whiteout(upperdir, dentry); ++ dput(newdentry); ++ newdentry = ERR_PTR(err); ++ } else if (WARN_ON(!newdentry->d_inode)) { ++ /* ++ * Not quite sure if non-instantiated dentry is legal or not. ++ * VFS doesn't seem to care so check and warn here. ++ */ ++ dput(newdentry); ++ newdentry = ERR_PTR(-ENOENT); ++ } ++ ++out: ++ return newdentry; ++ ++} ++ ++static int ovl_set_opaque(struct dentry *upperdentry) ++{ ++ int err; ++ const struct cred *old_cred; ++ struct cred *override_cred; ++ ++ override_cred = prepare_creds(); ++ if (!override_cred) ++ return -ENOMEM; ++ ++ /* CAP_SYS_ADMIN for setxattr of "trusted" namespace */ ++ cap_raise(override_cred->cap_effective, CAP_SYS_ADMIN); ++ old_cred = override_creds(override_cred); ++ err = vfs_setxattr(upperdentry, ovl_opaque_xattr, "y", 1, 0); ++ revert_creds(old_cred); ++ put_cred(override_cred); ++ ++ return err; ++} ++ ++static int ovl_remove_opaque(struct dentry *upperdentry) ++{ ++ int err; ++ const struct cred *old_cred; ++ struct cred *override_cred; ++ ++ override_cred = prepare_creds(); ++ if (!override_cred) ++ return -ENOMEM; ++ ++ /* CAP_SYS_ADMIN for removexattr of "trusted" namespace */ ++ cap_raise(override_cred->cap_effective, CAP_SYS_ADMIN); ++ old_cred = override_creds(override_cred); ++ err = vfs_removexattr(upperdentry, ovl_opaque_xattr); ++ revert_creds(old_cred); ++ put_cred(override_cred); ++ ++ return err; ++} ++ ++static int ovl_dir_getattr(struct vfsmount *mnt, struct dentry *dentry, ++ struct kstat *stat) ++{ ++ int err; ++ enum ovl_path_type type; ++ struct path realpath; ++ ++ type = ovl_path_real(dentry, &realpath); ++ err = vfs_getattr(&realpath, stat); ++ if (err) ++ return err; ++ ++ stat->dev = dentry->d_sb->s_dev; ++ stat->ino = dentry->d_inode->i_ino; ++ ++ /* ++ * It's probably not worth it to count subdirs to get the ++ * correct link count. nlink=1 seems to pacify 'find' and ++ * other utilities. ++ */ ++ if (type == OVL_PATH_MERGE) ++ stat->nlink = 1; ++ ++ return 0; ++} ++ ++static int ovl_create_object(struct dentry *dentry, int mode, dev_t rdev, ++ const char *link) ++{ ++ int err; ++ struct dentry *newdentry; ++ struct dentry *upperdir; ++ struct inode *inode; ++ struct kstat stat = { ++ .mode = mode, ++ .rdev = rdev, ++ }; ++ ++ err = -ENOMEM; ++ inode = ovl_new_inode(dentry->d_sb, mode, dentry->d_fsdata); ++ if (!inode) ++ goto out; ++ ++ err = ovl_copy_up(dentry->d_parent); ++ if (err) ++ goto out_iput; ++ ++ upperdir = ovl_dentry_upper(dentry->d_parent); ++ mutex_lock_nested(&upperdir->d_inode->i_mutex, I_MUTEX_PARENT); ++ ++ newdentry = ovl_upper_create(upperdir, dentry, &stat, link); ++ err = PTR_ERR(newdentry); ++ if (IS_ERR(newdentry)) ++ goto out_unlock; ++ ++ ovl_dentry_version_inc(dentry->d_parent); ++ if (ovl_dentry_is_opaque(dentry) && S_ISDIR(mode)) { ++ err = ovl_set_opaque(newdentry); ++ if (err) { ++ vfs_rmdir(upperdir->d_inode, newdentry); ++ ovl_whiteout(upperdir, dentry); ++ goto out_dput; ++ } ++ } ++ ovl_dentry_update(dentry, newdentry); ++ ovl_copyattr(newdentry->d_inode, inode); ++ d_instantiate(dentry, inode); ++ inode = NULL; ++ newdentry = NULL; ++ err = 0; ++ ++out_dput: ++ dput(newdentry); ++out_unlock: ++ mutex_unlock(&upperdir->d_inode->i_mutex); ++out_iput: ++ iput(inode); ++out: ++ return err; ++} ++ ++static int ovl_create(struct inode *dir, struct dentry *dentry, umode_t mode, ++ bool excl) ++{ ++ return ovl_create_object(dentry, (mode & 07777) | S_IFREG, 0, NULL); ++} ++ ++static int ovl_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) ++{ ++ return ovl_create_object(dentry, (mode & 07777) | S_IFDIR, 0, NULL); ++} ++ ++static int ovl_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, ++ dev_t rdev) ++{ ++ return ovl_create_object(dentry, mode, rdev, NULL); ++} ++ ++static int ovl_symlink(struct inode *dir, struct dentry *dentry, ++ const char *link) ++{ ++ return ovl_create_object(dentry, S_IFLNK, 0, link); ++} ++ ++static int ovl_do_remove(struct dentry *dentry, bool is_dir) ++{ ++ int err; ++ enum ovl_path_type type; ++ struct path realpath; ++ struct dentry *upperdir; ++ ++ err = ovl_copy_up(dentry->d_parent); ++ if (err) ++ return err; ++ ++ upperdir = ovl_dentry_upper(dentry->d_parent); ++ mutex_lock_nested(&upperdir->d_inode->i_mutex, I_MUTEX_PARENT); ++ type = ovl_path_real(dentry, &realpath); ++ if (type != OVL_PATH_LOWER) { ++ err = -ESTALE; ++ if (realpath.dentry->d_parent != upperdir) ++ goto out_d_drop; ++ ++ /* FIXME: create whiteout up front and rename to target */ ++ ++ if (is_dir) ++ err = vfs_rmdir(upperdir->d_inode, realpath.dentry); ++ else ++ err = vfs_unlink(upperdir->d_inode, realpath.dentry); ++ if (err) ++ goto out_d_drop; ++ ++ ovl_dentry_version_inc(dentry->d_parent); ++ } ++ ++ if (type != OVL_PATH_UPPER || ovl_dentry_is_opaque(dentry)) ++ err = ovl_whiteout(upperdir, dentry); ++ ++ /* ++ * Keeping this dentry hashed would mean having to release ++ * upperpath/lowerpath, which could only be done if we are the ++ * sole user of this dentry. Too tricky... Just unhash for ++ * now. ++ */ ++out_d_drop: ++ d_drop(dentry); ++ mutex_unlock(&upperdir->d_inode->i_mutex); ++ ++ return err; ++} ++ ++static int ovl_unlink(struct inode *dir, struct dentry *dentry) ++{ ++ return ovl_do_remove(dentry, false); ++} ++ ++ ++static int ovl_rmdir(struct inode *dir, struct dentry *dentry) ++{ ++ int err; ++ enum ovl_path_type type; ++ ++ type = ovl_path_type(dentry); ++ if (type != OVL_PATH_UPPER) { ++ err = ovl_check_empty_and_clear(dentry, type); ++ if (err) ++ return err; ++ } ++ ++ return ovl_do_remove(dentry, true); ++} ++ ++static int ovl_link(struct dentry *old, struct inode *newdir, ++ struct dentry *new) ++{ ++ int err; ++ struct dentry *olddentry; ++ struct dentry *newdentry; ++ struct dentry *upperdir; ++ struct inode *newinode; ++ ++ err = ovl_copy_up(old); ++ if (err) ++ goto out; ++ ++ err = ovl_copy_up(new->d_parent); ++ if (err) ++ goto out; ++ ++ upperdir = ovl_dentry_upper(new->d_parent); ++ mutex_lock_nested(&upperdir->d_inode->i_mutex, I_MUTEX_PARENT); ++ newdentry = ovl_lookup_create(upperdir, new); ++ err = PTR_ERR(newdentry); ++ if (IS_ERR(newdentry)) ++ goto out_unlock; ++ ++ olddentry = ovl_dentry_upper(old); ++ err = vfs_link(olddentry, upperdir->d_inode, newdentry); ++ if (!err) { ++ if (WARN_ON(!newdentry->d_inode)) { ++ dput(newdentry); ++ err = -ENOENT; ++ goto out_unlock; ++ } ++ newinode = ovl_new_inode(old->d_sb, newdentry->d_inode->i_mode, ++ new->d_fsdata); ++ if (!newinode) { ++ err = -ENOMEM; ++ goto link_fail; ++ } ++ ovl_copyattr(upperdir->d_inode, newinode); ++ ++ ovl_dentry_version_inc(new->d_parent); ++ ovl_dentry_update(new, newdentry); ++ ++ d_instantiate(new, newinode); ++ } else { ++link_fail: ++ if (ovl_dentry_is_opaque(new)) ++ ovl_whiteout(upperdir, new); ++ dput(newdentry); ++ } ++out_unlock: ++ mutex_unlock(&upperdir->d_inode->i_mutex); ++out: ++ return err; ++} ++ ++static int ovl_rename(struct inode *olddir, struct dentry *old, ++ struct inode *newdir, struct dentry *new) ++{ ++ int err; ++ enum ovl_path_type old_type; ++ enum ovl_path_type new_type; ++ struct dentry *old_upperdir; ++ struct dentry *new_upperdir; ++ struct dentry *olddentry; ++ struct dentry *newdentry; ++ struct dentry *trap; ++ bool old_opaque; ++ bool new_opaque; ++ bool new_create = false; ++ bool is_dir = S_ISDIR(old->d_inode->i_mode); ++ ++ /* Don't copy up directory trees */ ++ old_type = ovl_path_type(old); ++ if (old_type != OVL_PATH_UPPER && is_dir) ++ return -EXDEV; ++ ++ if (new->d_inode) { ++ new_type = ovl_path_type(new); ++ ++ if (new_type == OVL_PATH_LOWER && old_type == OVL_PATH_LOWER) { ++ if (ovl_dentry_lower(old)->d_inode == ++ ovl_dentry_lower(new)->d_inode) ++ return 0; ++ } ++ if (new_type != OVL_PATH_LOWER && old_type != OVL_PATH_LOWER) { ++ if (ovl_dentry_upper(old)->d_inode == ++ ovl_dentry_upper(new)->d_inode) ++ return 0; ++ } ++ ++ if (new_type != OVL_PATH_UPPER && ++ S_ISDIR(new->d_inode->i_mode)) { ++ err = ovl_check_empty_and_clear(new, new_type); ++ if (err) ++ return err; ++ } ++ } else { ++ new_type = OVL_PATH_UPPER; ++ } ++ ++ err = ovl_copy_up(old); ++ if (err) ++ return err; ++ ++ err = ovl_copy_up(new->d_parent); ++ if (err) ++ return err; ++ ++ old_upperdir = ovl_dentry_upper(old->d_parent); ++ new_upperdir = ovl_dentry_upper(new->d_parent); ++ ++ trap = lock_rename(new_upperdir, old_upperdir); ++ ++ olddentry = ovl_dentry_upper(old); ++ newdentry = ovl_dentry_upper(new); ++ if (newdentry) { ++ dget(newdentry); ++ } else { ++ new_create = true; ++ newdentry = ovl_lookup_create(new_upperdir, new); ++ err = PTR_ERR(newdentry); ++ if (IS_ERR(newdentry)) ++ goto out_unlock; ++ } ++ ++ err = -ESTALE; ++ if (olddentry->d_parent != old_upperdir) ++ goto out_dput; ++ if (newdentry->d_parent != new_upperdir) ++ goto out_dput; ++ if (olddentry == trap) ++ goto out_dput; ++ if (newdentry == trap) ++ goto out_dput; ++ ++ old_opaque = ovl_dentry_is_opaque(old); ++ new_opaque = ovl_dentry_is_opaque(new) || new_type != OVL_PATH_UPPER; ++ ++ if (is_dir && !old_opaque && new_opaque) { ++ err = ovl_set_opaque(olddentry); ++ if (err) ++ goto out_dput; ++ } ++ ++ err = vfs_rename(old_upperdir->d_inode, olddentry, ++ new_upperdir->d_inode, newdentry); ++ ++ if (err) { ++ if (new_create && ovl_dentry_is_opaque(new)) ++ ovl_whiteout(new_upperdir, new); ++ if (is_dir && !old_opaque && new_opaque) ++ ovl_remove_opaque(olddentry); ++ goto out_dput; ++ } ++ ++ if (old_type != OVL_PATH_UPPER || old_opaque) ++ err = ovl_whiteout(old_upperdir, old); ++ if (is_dir && old_opaque && !new_opaque) ++ ovl_remove_opaque(olddentry); ++ ++ if (old_opaque != new_opaque) ++ ovl_dentry_set_opaque(old, new_opaque); ++ ++ ovl_dentry_version_inc(old->d_parent); ++ ovl_dentry_version_inc(new->d_parent); ++ ++out_dput: ++ dput(newdentry); ++out_unlock: ++ unlock_rename(new_upperdir, old_upperdir); ++ return err; ++} ++ ++const struct inode_operations ovl_dir_inode_operations = { ++ .lookup = ovl_lookup, ++ .mkdir = ovl_mkdir, ++ .symlink = ovl_symlink, ++ .unlink = ovl_unlink, ++ .rmdir = ovl_rmdir, ++ .rename = ovl_rename, ++ .link = ovl_link, ++ .setattr = ovl_setattr, ++ .create = ovl_create, ++ .mknod = ovl_mknod, ++ .permission = ovl_permission, ++ .getattr = ovl_dir_getattr, ++ .setxattr = ovl_setxattr, ++ .getxattr = ovl_getxattr, ++ .listxattr = ovl_listxattr, ++ .removexattr = ovl_removexattr, ++}; +diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c +new file mode 100644 +index 0000000..ee37e92 +--- /dev/null ++++ b/fs/overlayfs/inode.c +@@ -0,0 +1,372 @@ ++/* ++ * ++ * Copyright (C) 2011 Novell Inc. ++ * ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License version 2 as published by ++ * the Free Software Foundation. ++ */ ++ ++#include ++#include ++#include ++#include "overlayfs.h" ++ ++int ovl_setattr(struct dentry *dentry, struct iattr *attr) ++{ ++ struct dentry *upperdentry; ++ int err; ++ ++ if ((attr->ia_valid & ATTR_SIZE) && !ovl_dentry_upper(dentry)) ++ err = ovl_copy_up_truncate(dentry, attr->ia_size); ++ else ++ err = ovl_copy_up(dentry); ++ if (err) ++ return err; ++ ++ upperdentry = ovl_dentry_upper(dentry); ++ ++ if (attr->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) ++ attr->ia_valid &= ~ATTR_MODE; ++ ++ mutex_lock(&upperdentry->d_inode->i_mutex); ++ err = notify_change(upperdentry, attr); ++ if (!err) ++ ovl_copyattr(upperdentry->d_inode, dentry->d_inode); ++ mutex_unlock(&upperdentry->d_inode->i_mutex); ++ ++ return err; ++} ++ ++static int ovl_getattr(struct vfsmount *mnt, struct dentry *dentry, ++ struct kstat *stat) ++{ ++ struct path realpath; ++ ++ ovl_path_real(dentry, &realpath); ++ return vfs_getattr(&realpath, stat); ++} ++ ++int ovl_permission(struct inode *inode, int mask) ++{ ++ struct ovl_entry *oe; ++ struct dentry *alias = NULL; ++ struct inode *realinode; ++ struct dentry *realdentry; ++ bool is_upper; ++ int err; ++ ++ if (S_ISDIR(inode->i_mode)) { ++ oe = inode->i_private; ++ } else if (mask & MAY_NOT_BLOCK) { ++ return -ECHILD; ++ } else { ++ /* ++ * For non-directories find an alias and get the info ++ * from there. ++ */ ++ alias = d_find_any_alias(inode); ++ if (WARN_ON(!alias)) ++ return -ENOENT; ++ ++ oe = alias->d_fsdata; ++ } ++ ++ realdentry = ovl_entry_real(oe, &is_upper); ++ ++ /* Careful in RCU walk mode */ ++ realinode = ACCESS_ONCE(realdentry->d_inode); ++ if (!realinode) { ++ WARN_ON(!(mask & MAY_NOT_BLOCK)); ++ err = -ENOENT; ++ goto out_dput; ++ } ++ ++ if (mask & MAY_WRITE) { ++ umode_t mode = realinode->i_mode; ++ ++ /* ++ * Writes will always be redirected to upper layer, so ++ * ignore lower layer being read-only. ++ * ++ * If the overlay itself is read-only then proceed ++ * with the permission check, don't return EROFS. ++ * This will only happen if this is the lower layer of ++ * another overlayfs. ++ * ++ * If upper fs becomes read-only after the overlay was ++ * constructed return EROFS to prevent modification of ++ * upper layer. ++ */ ++ err = -EROFS; ++ if (is_upper && !IS_RDONLY(inode) && IS_RDONLY(realinode) && ++ (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))) ++ goto out_dput; ++ } ++ ++ err = __inode_permission(realinode, mask); ++out_dput: ++ dput(alias); ++ return err; ++} ++ ++ ++struct ovl_link_data { ++ struct dentry *realdentry; ++ void *cookie; ++}; ++ ++static void *ovl_follow_link(struct dentry *dentry, struct nameidata *nd) ++{ ++ void *ret; ++ struct dentry *realdentry; ++ struct inode *realinode; ++ ++ realdentry = ovl_dentry_real(dentry); ++ realinode = realdentry->d_inode; ++ ++ if (WARN_ON(!realinode->i_op->follow_link)) ++ return ERR_PTR(-EPERM); ++ ++ ret = realinode->i_op->follow_link(realdentry, nd); ++ if (IS_ERR(ret)) ++ return ret; ++ ++ if (realinode->i_op->put_link) { ++ struct ovl_link_data *data; ++ ++ data = kmalloc(sizeof(struct ovl_link_data), GFP_KERNEL); ++ if (!data) { ++ realinode->i_op->put_link(realdentry, nd, ret); ++ return ERR_PTR(-ENOMEM); ++ } ++ data->realdentry = realdentry; ++ data->cookie = ret; ++ ++ return data; ++ } else { ++ return NULL; ++ } ++} ++ ++static void ovl_put_link(struct dentry *dentry, struct nameidata *nd, void *c) ++{ ++ struct inode *realinode; ++ struct ovl_link_data *data = c; ++ ++ if (!data) ++ return; ++ ++ realinode = data->realdentry->d_inode; ++ realinode->i_op->put_link(data->realdentry, nd, data->cookie); ++ kfree(data); ++} ++ ++static int ovl_readlink(struct dentry *dentry, char __user *buf, int bufsiz) ++{ ++ struct path realpath; ++ struct inode *realinode; ++ ++ ovl_path_real(dentry, &realpath); ++ realinode = realpath.dentry->d_inode; ++ ++ if (!realinode->i_op->readlink) ++ return -EINVAL; ++ ++ touch_atime(&realpath); ++ ++ return realinode->i_op->readlink(realpath.dentry, buf, bufsiz); ++} ++ ++ ++static bool ovl_is_private_xattr(const char *name) ++{ ++ return strncmp(name, "trusted.overlay.", 14) == 0; ++} ++ ++int ovl_setxattr(struct dentry *dentry, const char *name, ++ const void *value, size_t size, int flags) ++{ ++ int err; ++ struct dentry *upperdentry; ++ ++ if (ovl_is_private_xattr(name)) ++ return -EPERM; ++ ++ err = ovl_copy_up(dentry); ++ if (err) ++ return err; ++ ++ upperdentry = ovl_dentry_upper(dentry); ++ return vfs_setxattr(upperdentry, name, value, size, flags); ++} ++ ++ssize_t ovl_getxattr(struct dentry *dentry, const char *name, ++ void *value, size_t size) ++{ ++ if (ovl_path_type(dentry->d_parent) == OVL_PATH_MERGE && ++ ovl_is_private_xattr(name)) ++ return -ENODATA; ++ ++ return vfs_getxattr(ovl_dentry_real(dentry), name, value, size); ++} ++ ++ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size) ++{ ++ ssize_t res; ++ int off; ++ ++ res = vfs_listxattr(ovl_dentry_real(dentry), list, size); ++ if (res <= 0 || size == 0) ++ return res; ++ ++ if (ovl_path_type(dentry->d_parent) != OVL_PATH_MERGE) ++ return res; ++ ++ /* filter out private xattrs */ ++ for (off = 0; off < res;) { ++ char *s = list + off; ++ size_t slen = strlen(s) + 1; ++ ++ BUG_ON(off + slen > res); ++ ++ if (ovl_is_private_xattr(s)) { ++ res -= slen; ++ memmove(s, s + slen, res - off); ++ } else { ++ off += slen; ++ } ++ } ++ ++ return res; ++} ++ ++int ovl_removexattr(struct dentry *dentry, const char *name) ++{ ++ int err; ++ struct path realpath; ++ enum ovl_path_type type; ++ ++ if (ovl_path_type(dentry->d_parent) == OVL_PATH_MERGE && ++ ovl_is_private_xattr(name)) ++ return -ENODATA; ++ ++ type = ovl_path_real(dentry, &realpath); ++ if (type == OVL_PATH_LOWER) { ++ err = vfs_getxattr(realpath.dentry, name, NULL, 0); ++ if (err < 0) ++ return err; ++ ++ err = ovl_copy_up(dentry); ++ if (err) ++ return err; ++ ++ ovl_path_upper(dentry, &realpath); ++ } ++ ++ return vfs_removexattr(realpath.dentry, name); ++} ++ ++static bool ovl_open_need_copy_up(int flags, enum ovl_path_type type, ++ struct dentry *realdentry) ++{ ++ if (type != OVL_PATH_LOWER) ++ return false; ++ ++ if (special_file(realdentry->d_inode->i_mode)) ++ return false; ++ ++ if (!(OPEN_FMODE(flags) & FMODE_WRITE) && !(flags & O_TRUNC)) ++ return false; ++ ++ return true; ++} ++ ++static int ovl_dentry_open(struct dentry *dentry, struct file *file, ++ const struct cred *cred) ++{ ++ int err; ++ struct path realpath; ++ enum ovl_path_type type; ++ ++ type = ovl_path_real(dentry, &realpath); ++ if (ovl_open_need_copy_up(file->f_flags, type, realpath.dentry)) { ++ if (file->f_flags & O_TRUNC) ++ err = ovl_copy_up_truncate(dentry, 0); ++ else ++ err = ovl_copy_up(dentry); ++ if (err) ++ return err; ++ ++ ovl_path_upper(dentry, &realpath); ++ } ++ ++ return vfs_open(&realpath, file, cred); ++} ++ ++static const struct inode_operations ovl_file_inode_operations = { ++ .setattr = ovl_setattr, ++ .permission = ovl_permission, ++ .getattr = ovl_getattr, ++ .setxattr = ovl_setxattr, ++ .getxattr = ovl_getxattr, ++ .listxattr = ovl_listxattr, ++ .removexattr = ovl_removexattr, ++ .dentry_open = ovl_dentry_open, ++}; ++ ++static const struct inode_operations ovl_symlink_inode_operations = { ++ .setattr = ovl_setattr, ++ .follow_link = ovl_follow_link, ++ .put_link = ovl_put_link, ++ .readlink = ovl_readlink, ++ .getattr = ovl_getattr, ++ .setxattr = ovl_setxattr, ++ .getxattr = ovl_getxattr, ++ .listxattr = ovl_listxattr, ++ .removexattr = ovl_removexattr, ++}; ++ ++struct inode *ovl_new_inode(struct super_block *sb, umode_t mode, ++ struct ovl_entry *oe) ++{ ++ struct inode *inode; ++ ++ inode = new_inode(sb); ++ if (!inode) ++ return NULL; ++ ++ mode &= S_IFMT; ++ ++ inode->i_ino = get_next_ino(); ++ inode->i_mode = mode; ++ inode->i_flags |= S_NOATIME | S_NOCMTIME; ++ ++ switch (mode) { ++ case S_IFDIR: ++ inode->i_private = oe; ++ inode->i_op = &ovl_dir_inode_operations; ++ inode->i_fop = &ovl_dir_operations; ++ break; ++ ++ case S_IFLNK: ++ inode->i_op = &ovl_symlink_inode_operations; ++ break; ++ ++ case S_IFREG: ++ case S_IFSOCK: ++ case S_IFBLK: ++ case S_IFCHR: ++ case S_IFIFO: ++ inode->i_op = &ovl_file_inode_operations; ++ break; ++ ++ default: ++ WARN(1, "illegal file type: %i\n", mode); ++ iput(inode); ++ inode = NULL; ++ } ++ ++ return inode; ++ ++} +diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h +new file mode 100644 +index 0000000..1cba38f +--- /dev/null ++++ b/fs/overlayfs/overlayfs.h +@@ -0,0 +1,70 @@ ++/* ++ * ++ * Copyright (C) 2011 Novell Inc. ++ * ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License version 2 as published by ++ * the Free Software Foundation. ++ */ ++ ++struct ovl_entry; ++ ++enum ovl_path_type { ++ OVL_PATH_UPPER, ++ OVL_PATH_MERGE, ++ OVL_PATH_LOWER, ++}; ++ ++extern const char *ovl_opaque_xattr; ++extern const char *ovl_whiteout_xattr; ++extern const struct dentry_operations ovl_dentry_operations; ++ ++enum ovl_path_type ovl_path_type(struct dentry *dentry); ++u64 ovl_dentry_version_get(struct dentry *dentry); ++void ovl_dentry_version_inc(struct dentry *dentry); ++void ovl_path_upper(struct dentry *dentry, struct path *path); ++void ovl_path_lower(struct dentry *dentry, struct path *path); ++enum ovl_path_type ovl_path_real(struct dentry *dentry, struct path *path); ++struct dentry *ovl_dentry_upper(struct dentry *dentry); ++struct dentry *ovl_dentry_lower(struct dentry *dentry); ++struct dentry *ovl_dentry_real(struct dentry *dentry); ++struct dentry *ovl_entry_real(struct ovl_entry *oe, bool *is_upper); ++bool ovl_dentry_is_opaque(struct dentry *dentry); ++void ovl_dentry_set_opaque(struct dentry *dentry, bool opaque); ++bool ovl_is_whiteout(struct dentry *dentry); ++void ovl_dentry_update(struct dentry *dentry, struct dentry *upperdentry); ++struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry, ++ unsigned int flags); ++struct file *ovl_path_open(struct path *path, int flags); ++ ++struct dentry *ovl_upper_create(struct dentry *upperdir, struct dentry *dentry, ++ struct kstat *stat, const char *link); ++ ++/* readdir.c */ ++extern const struct file_operations ovl_dir_operations; ++int ovl_check_empty_and_clear(struct dentry *dentry, enum ovl_path_type type); ++ ++/* inode.c */ ++int ovl_setattr(struct dentry *dentry, struct iattr *attr); ++int ovl_permission(struct inode *inode, int mask); ++int ovl_setxattr(struct dentry *dentry, const char *name, ++ const void *value, size_t size, int flags); ++ssize_t ovl_getxattr(struct dentry *dentry, const char *name, ++ void *value, size_t size); ++ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size); ++int ovl_removexattr(struct dentry *dentry, const char *name); ++ ++struct inode *ovl_new_inode(struct super_block *sb, umode_t mode, ++ struct ovl_entry *oe); ++static inline void ovl_copyattr(struct inode *from, struct inode *to) ++{ ++ to->i_uid = from->i_uid; ++ to->i_gid = from->i_gid; ++} ++ ++/* dir.c */ ++extern const struct inode_operations ovl_dir_inode_operations; ++ ++/* copy_up.c */ ++int ovl_copy_up(struct dentry *dentry); ++int ovl_copy_up_truncate(struct dentry *dentry, loff_t size); +diff --git a/fs/overlayfs/readdir.c b/fs/overlayfs/readdir.c +new file mode 100644 +index 0000000..4c18abf +--- /dev/null ++++ b/fs/overlayfs/readdir.c +@@ -0,0 +1,566 @@ ++/* ++ * ++ * Copyright (C) 2011 Novell Inc. ++ * ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License version 2 as published by ++ * the Free Software Foundation. ++ */ ++ ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include "overlayfs.h" ++ ++struct ovl_cache_entry { ++ const char *name; ++ unsigned int len; ++ unsigned int type; ++ u64 ino; ++ bool is_whiteout; ++ struct list_head l_node; ++ struct rb_node node; ++}; ++ ++struct ovl_readdir_data { ++ struct rb_root *root; ++ struct list_head *list; ++ struct list_head *middle; ++ struct dentry *dir; ++ int count; ++ int err; ++}; ++ ++struct ovl_dir_file { ++ bool is_real; ++ bool is_cached; ++ struct list_head cursor; ++ u64 cache_version; ++ struct list_head cache; ++ struct file *realfile; ++}; ++ ++static struct ovl_cache_entry *ovl_cache_entry_from_node(struct rb_node *n) ++{ ++ return container_of(n, struct ovl_cache_entry, node); ++} ++ ++static struct ovl_cache_entry *ovl_cache_entry_find(struct rb_root *root, ++ const char *name, int len) ++{ ++ struct rb_node *node = root->rb_node; ++ int cmp; ++ ++ while (node) { ++ struct ovl_cache_entry *p = ovl_cache_entry_from_node(node); ++ ++ cmp = strncmp(name, p->name, len); ++ if (cmp > 0) ++ node = p->node.rb_right; ++ else if (cmp < 0 || len < p->len) ++ node = p->node.rb_left; ++ else ++ return p; ++ } ++ ++ return NULL; ++} ++ ++static struct ovl_cache_entry *ovl_cache_entry_new(const char *name, int len, ++ u64 ino, unsigned int d_type) ++{ ++ struct ovl_cache_entry *p; ++ ++ p = kmalloc(sizeof(*p) + len + 1, GFP_KERNEL); ++ if (p) { ++ char *name_copy = (char *) (p + 1); ++ memcpy(name_copy, name, len); ++ name_copy[len] = '\0'; ++ p->name = name_copy; ++ p->len = len; ++ p->type = d_type; ++ p->ino = ino; ++ p->is_whiteout = false; ++ } ++ ++ return p; ++} ++ ++static int ovl_cache_entry_add_rb(struct ovl_readdir_data *rdd, ++ const char *name, int len, u64 ino, ++ unsigned int d_type) ++{ ++ struct rb_node **newp = &rdd->root->rb_node; ++ struct rb_node *parent = NULL; ++ struct ovl_cache_entry *p; ++ ++ while (*newp) { ++ int cmp; ++ struct ovl_cache_entry *tmp; ++ ++ parent = *newp; ++ tmp = ovl_cache_entry_from_node(*newp); ++ cmp = strncmp(name, tmp->name, len); ++ if (cmp > 0) ++ newp = &tmp->node.rb_right; ++ else if (cmp < 0 || len < tmp->len) ++ newp = &tmp->node.rb_left; ++ else ++ return 0; ++ } ++ ++ p = ovl_cache_entry_new(name, len, ino, d_type); ++ if (p == NULL) ++ return -ENOMEM; ++ ++ list_add_tail(&p->l_node, rdd->list); ++ rb_link_node(&p->node, parent, newp); ++ rb_insert_color(&p->node, rdd->root); ++ ++ return 0; ++} ++ ++static int ovl_fill_lower(void *buf, const char *name, int namelen, ++ loff_t offset, u64 ino, unsigned int d_type) ++{ ++ struct ovl_readdir_data *rdd = buf; ++ struct ovl_cache_entry *p; ++ ++ rdd->count++; ++ p = ovl_cache_entry_find(rdd->root, name, namelen); ++ if (p) { ++ list_move_tail(&p->l_node, rdd->middle); ++ } else { ++ p = ovl_cache_entry_new(name, namelen, ino, d_type); ++ if (p == NULL) ++ rdd->err = -ENOMEM; ++ else ++ list_add_tail(&p->l_node, rdd->middle); ++ } ++ ++ return rdd->err; ++} ++ ++static void ovl_cache_free(struct list_head *list) ++{ ++ struct ovl_cache_entry *p; ++ struct ovl_cache_entry *n; ++ ++ list_for_each_entry_safe(p, n, list, l_node) ++ kfree(p); ++ ++ INIT_LIST_HEAD(list); ++} ++ ++static int ovl_fill_upper(void *buf, const char *name, int namelen, ++ loff_t offset, u64 ino, unsigned int d_type) ++{ ++ struct ovl_readdir_data *rdd = buf; ++ ++ rdd->count++; ++ return ovl_cache_entry_add_rb(rdd, name, namelen, ino, d_type); ++} ++ ++static inline int ovl_dir_read(struct path *realpath, ++ struct ovl_readdir_data *rdd, filldir_t filler) ++{ ++ struct file *realfile; ++ int err; ++ ++ realfile = ovl_path_open(realpath, O_RDONLY | O_DIRECTORY); ++ if (IS_ERR(realfile)) ++ return PTR_ERR(realfile); ++ ++ do { ++ rdd->count = 0; ++ rdd->err = 0; ++ err = vfs_readdir(realfile, filler, rdd); ++ if (err >= 0) ++ err = rdd->err; ++ } while (!err && rdd->count); ++ fput(realfile); ++ ++ return 0; ++} ++ ++static void ovl_dir_reset(struct file *file) ++{ ++ struct ovl_dir_file *od = file->private_data; ++ enum ovl_path_type type = ovl_path_type(file->f_path.dentry); ++ ++ if (ovl_dentry_version_get(file->f_path.dentry) != od->cache_version) { ++ list_del_init(&od->cursor); ++ ovl_cache_free(&od->cache); ++ od->is_cached = false; ++ } ++ WARN_ON(!od->is_real && type != OVL_PATH_MERGE); ++ if (od->is_real && type == OVL_PATH_MERGE) { ++ fput(od->realfile); ++ od->realfile = NULL; ++ od->is_real = false; ++ } ++} ++ ++static int ovl_dir_mark_whiteouts(struct ovl_readdir_data *rdd) ++{ ++ struct ovl_cache_entry *p; ++ struct dentry *dentry; ++ const struct cred *old_cred; ++ struct cred *override_cred; ++ ++ override_cred = prepare_creds(); ++ if (!override_cred) { ++ ovl_cache_free(rdd->list); ++ return -ENOMEM; ++ } ++ ++ /* ++ * CAP_SYS_ADMIN for getxattr ++ * CAP_DAC_OVERRIDE for lookup ++ */ ++ cap_raise(override_cred->cap_effective, CAP_SYS_ADMIN); ++ cap_raise(override_cred->cap_effective, CAP_DAC_OVERRIDE); ++ old_cred = override_creds(override_cred); ++ ++ mutex_lock(&rdd->dir->d_inode->i_mutex); ++ list_for_each_entry(p, rdd->list, l_node) { ++ if (p->type != DT_LNK) ++ continue; ++ ++ dentry = lookup_one_len(p->name, rdd->dir, p->len); ++ if (IS_ERR(dentry)) ++ continue; ++ ++ p->is_whiteout = ovl_is_whiteout(dentry); ++ dput(dentry); ++ } ++ mutex_unlock(&rdd->dir->d_inode->i_mutex); ++ ++ revert_creds(old_cred); ++ put_cred(override_cred); ++ ++ return 0; ++} ++ ++static inline int ovl_dir_read_merged(struct path *upperpath, ++ struct path *lowerpath, ++ struct ovl_readdir_data *rdd) ++{ ++ int err; ++ struct rb_root root = RB_ROOT; ++ struct list_head middle; ++ ++ rdd->root = &root; ++ if (upperpath->dentry) { ++ rdd->dir = upperpath->dentry; ++ err = ovl_dir_read(upperpath, rdd, ovl_fill_upper); ++ if (err) ++ goto out; ++ ++ err = ovl_dir_mark_whiteouts(rdd); ++ if (err) ++ goto out; ++ } ++ /* ++ * Insert lowerpath entries before upperpath ones, this allows ++ * offsets to be reasonably constant ++ */ ++ list_add(&middle, rdd->list); ++ rdd->middle = &middle; ++ err = ovl_dir_read(lowerpath, rdd, ovl_fill_lower); ++ list_del(&middle); ++out: ++ rdd->root = NULL; ++ ++ return err; ++} ++ ++static void ovl_seek_cursor(struct ovl_dir_file *od, loff_t pos) ++{ ++ struct list_head *l; ++ loff_t off; ++ ++ l = od->cache.next; ++ for (off = 0; off < pos; off++) { ++ if (l == &od->cache) ++ break; ++ l = l->next; ++ } ++ list_move_tail(&od->cursor, l); ++} ++ ++static int ovl_readdir(struct file *file, void *buf, filldir_t filler) ++{ ++ struct ovl_dir_file *od = file->private_data; ++ int res; ++ ++ if (!file->f_pos) ++ ovl_dir_reset(file); ++ ++ if (od->is_real) { ++ res = vfs_readdir(od->realfile, filler, buf); ++ file->f_pos = od->realfile->f_pos; ++ ++ return res; ++ } ++ ++ if (!od->is_cached) { ++ struct path lowerpath; ++ struct path upperpath; ++ struct ovl_readdir_data rdd = { .list = &od->cache }; ++ ++ ovl_path_lower(file->f_path.dentry, &lowerpath); ++ ovl_path_upper(file->f_path.dentry, &upperpath); ++ ++ res = ovl_dir_read_merged(&upperpath, &lowerpath, &rdd); ++ if (res) { ++ ovl_cache_free(rdd.list); ++ return res; ++ } ++ ++ od->cache_version = ovl_dentry_version_get(file->f_path.dentry); ++ od->is_cached = true; ++ ++ ovl_seek_cursor(od, file->f_pos); ++ } ++ ++ while (od->cursor.next != &od->cache) { ++ int over; ++ loff_t off; ++ struct ovl_cache_entry *p; ++ ++ p = list_entry(od->cursor.next, struct ovl_cache_entry, l_node); ++ off = file->f_pos; ++ if (!p->is_whiteout) { ++ over = filler(buf, p->name, p->len, off, p->ino, ++ p->type); ++ if (over) ++ break; ++ } ++ file->f_pos++; ++ list_move(&od->cursor, &p->l_node); ++ } ++ ++ return 0; ++} ++ ++static loff_t ovl_dir_llseek(struct file *file, loff_t offset, int origin) ++{ ++ loff_t res; ++ struct ovl_dir_file *od = file->private_data; ++ ++ mutex_lock(&file_inode(file)->i_mutex); ++ if (!file->f_pos) ++ ovl_dir_reset(file); ++ ++ if (od->is_real) { ++ res = vfs_llseek(od->realfile, offset, origin); ++ file->f_pos = od->realfile->f_pos; ++ } else { ++ res = -EINVAL; ++ ++ switch (origin) { ++ case SEEK_CUR: ++ offset += file->f_pos; ++ break; ++ case SEEK_SET: ++ break; ++ default: ++ goto out_unlock; ++ } ++ if (offset < 0) ++ goto out_unlock; ++ ++ if (offset != file->f_pos) { ++ file->f_pos = offset; ++ if (od->is_cached) ++ ovl_seek_cursor(od, offset); ++ } ++ res = offset; ++ } ++out_unlock: ++ mutex_unlock(&file_inode(file)->i_mutex); ++ ++ return res; ++} ++ ++static int ovl_dir_fsync(struct file *file, loff_t start, loff_t end, ++ int datasync) ++{ ++ struct ovl_dir_file *od = file->private_data; ++ ++ /* May need to reopen directory if it got copied up */ ++ if (!od->realfile) { ++ struct path upperpath; ++ ++ ovl_path_upper(file->f_path.dentry, &upperpath); ++ od->realfile = ovl_path_open(&upperpath, O_RDONLY); ++ if (IS_ERR(od->realfile)) ++ return PTR_ERR(od->realfile); ++ } ++ ++ return vfs_fsync_range(od->realfile, start, end, datasync); ++} ++ ++static int ovl_dir_release(struct inode *inode, struct file *file) ++{ ++ struct ovl_dir_file *od = file->private_data; ++ ++ list_del(&od->cursor); ++ ovl_cache_free(&od->cache); ++ if (od->realfile) ++ fput(od->realfile); ++ kfree(od); ++ ++ return 0; ++} ++ ++static int ovl_dir_open(struct inode *inode, struct file *file) ++{ ++ struct path realpath; ++ struct file *realfile; ++ struct ovl_dir_file *od; ++ enum ovl_path_type type; ++ ++ od = kzalloc(sizeof(struct ovl_dir_file), GFP_KERNEL); ++ if (!od) ++ return -ENOMEM; ++ ++ type = ovl_path_real(file->f_path.dentry, &realpath); ++ realfile = ovl_path_open(&realpath, file->f_flags); ++ if (IS_ERR(realfile)) { ++ kfree(od); ++ return PTR_ERR(realfile); ++ } ++ INIT_LIST_HEAD(&od->cache); ++ INIT_LIST_HEAD(&od->cursor); ++ od->is_cached = false; ++ od->realfile = realfile; ++ od->is_real = (type != OVL_PATH_MERGE); ++ file->private_data = od; ++ ++ return 0; ++} ++ ++const struct file_operations ovl_dir_operations = { ++ .read = generic_read_dir, ++ .open = ovl_dir_open, ++ .readdir = ovl_readdir, ++ .llseek = ovl_dir_llseek, ++ .fsync = ovl_dir_fsync, ++ .release = ovl_dir_release, ++}; ++ ++static int ovl_check_empty_dir(struct dentry *dentry, struct list_head *list) ++{ ++ int err; ++ struct path lowerpath; ++ struct path upperpath; ++ struct ovl_cache_entry *p; ++ struct ovl_readdir_data rdd = { .list = list }; ++ ++ ovl_path_upper(dentry, &upperpath); ++ ovl_path_lower(dentry, &lowerpath); ++ ++ err = ovl_dir_read_merged(&upperpath, &lowerpath, &rdd); ++ if (err) ++ return err; ++ ++ err = 0; ++ ++ list_for_each_entry(p, list, l_node) { ++ if (p->is_whiteout) ++ continue; ++ ++ if (p->name[0] == '.') { ++ if (p->len == 1) ++ continue; ++ if (p->len == 2 && p->name[1] == '.') ++ continue; ++ } ++ err = -ENOTEMPTY; ++ break; ++ } ++ ++ return err; ++} ++ ++static int ovl_remove_whiteouts(struct dentry *dir, struct list_head *list) ++{ ++ struct path upperpath; ++ struct dentry *upperdir; ++ struct ovl_cache_entry *p; ++ const struct cred *old_cred; ++ struct cred *override_cred; ++ int err; ++ ++ ovl_path_upper(dir, &upperpath); ++ upperdir = upperpath.dentry; ++ ++ override_cred = prepare_creds(); ++ if (!override_cred) ++ return -ENOMEM; ++ ++ /* ++ * CAP_DAC_OVERRIDE for lookup and unlink ++ * CAP_SYS_ADMIN for setxattr of "trusted" namespace ++ * CAP_FOWNER for unlink in sticky directory ++ */ ++ cap_raise(override_cred->cap_effective, CAP_DAC_OVERRIDE); ++ cap_raise(override_cred->cap_effective, CAP_SYS_ADMIN); ++ cap_raise(override_cred->cap_effective, CAP_FOWNER); ++ old_cred = override_creds(override_cred); ++ ++ err = vfs_setxattr(upperdir, ovl_opaque_xattr, "y", 1, 0); ++ if (err) ++ goto out_revert_creds; ++ ++ mutex_lock_nested(&upperdir->d_inode->i_mutex, I_MUTEX_PARENT); ++ list_for_each_entry(p, list, l_node) { ++ struct dentry *dentry; ++ int ret; ++ ++ if (!p->is_whiteout) ++ continue; ++ ++ dentry = lookup_one_len(p->name, upperdir, p->len); ++ if (IS_ERR(dentry)) { ++ pr_warn( ++ "overlayfs: failed to lookup whiteout %.*s: %li\n", ++ p->len, p->name, PTR_ERR(dentry)); ++ continue; ++ } ++ ret = vfs_unlink(upperdir->d_inode, dentry); ++ dput(dentry); ++ if (ret) ++ pr_warn( ++ "overlayfs: failed to unlink whiteout %.*s: %i\n", ++ p->len, p->name, ret); ++ } ++ mutex_unlock(&upperdir->d_inode->i_mutex); ++ ++out_revert_creds: ++ revert_creds(old_cred); ++ put_cred(override_cred); ++ ++ return err; ++} ++ ++int ovl_check_empty_and_clear(struct dentry *dentry, enum ovl_path_type type) ++{ ++ int err; ++ LIST_HEAD(list); ++ ++ err = ovl_check_empty_dir(dentry, &list); ++ if (!err && type == OVL_PATH_MERGE) ++ err = ovl_remove_whiteouts(dentry, &list); ++ ++ ovl_cache_free(&list); ++ ++ return err; ++} +diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c +new file mode 100644 +index 0000000..9473e79 +--- /dev/null ++++ b/fs/overlayfs/super.c +@@ -0,0 +1,685 @@ ++/* ++ * ++ * Copyright (C) 2011 Novell Inc. ++ * ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License version 2 as published by ++ * the Free Software Foundation. ++ */ ++ ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include "overlayfs.h" ++ ++MODULE_AUTHOR("Miklos Szeredi "); ++MODULE_DESCRIPTION("Overlay filesystem"); ++MODULE_LICENSE("GPL"); ++ ++#define OVERLAYFS_SUPER_MAGIC 0x794c764f ++ ++struct ovl_config { ++ char *lowerdir; ++ char *upperdir; ++}; ++ ++/* private information held for overlayfs's superblock */ ++struct ovl_fs { ++ struct vfsmount *upper_mnt; ++ struct vfsmount *lower_mnt; ++ long lower_namelen; ++ /* pathnames of lower and upper dirs, for show_options */ ++ struct ovl_config config; ++}; ++ ++/* private information held for every overlayfs dentry */ ++struct ovl_entry { ++ /* ++ * Keep "double reference" on upper dentries, so that ++ * d_delete() doesn't think it's OK to reset d_inode to NULL. ++ */ ++ struct dentry *__upperdentry; ++ struct dentry *lowerdentry; ++ union { ++ struct { ++ u64 version; ++ bool opaque; ++ }; ++ struct rcu_head rcu; ++ }; ++}; ++ ++const char *ovl_whiteout_xattr = "trusted.overlay.whiteout"; ++const char *ovl_opaque_xattr = "trusted.overlay.opaque"; ++ ++ ++enum ovl_path_type ovl_path_type(struct dentry *dentry) ++{ ++ struct ovl_entry *oe = dentry->d_fsdata; ++ ++ if (oe->__upperdentry) { ++ if (oe->lowerdentry && S_ISDIR(dentry->d_inode->i_mode)) ++ return OVL_PATH_MERGE; ++ else ++ return OVL_PATH_UPPER; ++ } else { ++ return OVL_PATH_LOWER; ++ } ++} ++ ++static struct dentry *ovl_upperdentry_dereference(struct ovl_entry *oe) ++{ ++ struct dentry *upperdentry = ACCESS_ONCE(oe->__upperdentry); ++ smp_read_barrier_depends(); ++ return upperdentry; ++} ++ ++void ovl_path_upper(struct dentry *dentry, struct path *path) ++{ ++ struct ovl_fs *ofs = dentry->d_sb->s_fs_info; ++ struct ovl_entry *oe = dentry->d_fsdata; ++ ++ path->mnt = ofs->upper_mnt; ++ path->dentry = ovl_upperdentry_dereference(oe); ++} ++ ++void ovl_path_lower(struct dentry *dentry, struct path *path) ++{ ++ struct ovl_fs *ofs = dentry->d_sb->s_fs_info; ++ struct ovl_entry *oe = dentry->d_fsdata; ++ ++ path->mnt = ofs->lower_mnt; ++ path->dentry = oe->lowerdentry; ++} ++ ++enum ovl_path_type ovl_path_real(struct dentry *dentry, struct path *path) ++{ ++ ++ enum ovl_path_type type = ovl_path_type(dentry); ++ ++ if (type == OVL_PATH_LOWER) ++ ovl_path_lower(dentry, path); ++ else ++ ovl_path_upper(dentry, path); ++ ++ return type; ++} ++ ++struct dentry *ovl_dentry_upper(struct dentry *dentry) ++{ ++ struct ovl_entry *oe = dentry->d_fsdata; ++ ++ return ovl_upperdentry_dereference(oe); ++} ++ ++struct dentry *ovl_dentry_lower(struct dentry *dentry) ++{ ++ struct ovl_entry *oe = dentry->d_fsdata; ++ ++ return oe->lowerdentry; ++} ++ ++struct dentry *ovl_dentry_real(struct dentry *dentry) ++{ ++ struct ovl_entry *oe = dentry->d_fsdata; ++ struct dentry *realdentry; ++ ++ realdentry = ovl_upperdentry_dereference(oe); ++ if (!realdentry) ++ realdentry = oe->lowerdentry; ++ ++ return realdentry; ++} ++ ++struct dentry *ovl_entry_real(struct ovl_entry *oe, bool *is_upper) ++{ ++ struct dentry *realdentry; ++ ++ realdentry = ovl_upperdentry_dereference(oe); ++ if (realdentry) { ++ *is_upper = true; ++ } else { ++ realdentry = oe->lowerdentry; ++ *is_upper = false; ++ } ++ return realdentry; ++} ++ ++bool ovl_dentry_is_opaque(struct dentry *dentry) ++{ ++ struct ovl_entry *oe = dentry->d_fsdata; ++ return oe->opaque; ++} ++ ++void ovl_dentry_set_opaque(struct dentry *dentry, bool opaque) ++{ ++ struct ovl_entry *oe = dentry->d_fsdata; ++ oe->opaque = opaque; ++} ++ ++void ovl_dentry_update(struct dentry *dentry, struct dentry *upperdentry) ++{ ++ struct ovl_entry *oe = dentry->d_fsdata; ++ ++ WARN_ON(!mutex_is_locked(&upperdentry->d_parent->d_inode->i_mutex)); ++ WARN_ON(oe->__upperdentry); ++ BUG_ON(!upperdentry->d_inode); ++ smp_wmb(); ++ oe->__upperdentry = dget(upperdentry); ++} ++ ++void ovl_dentry_version_inc(struct dentry *dentry) ++{ ++ struct ovl_entry *oe = dentry->d_fsdata; ++ ++ WARN_ON(!mutex_is_locked(&dentry->d_inode->i_mutex)); ++ oe->version++; ++} ++ ++u64 ovl_dentry_version_get(struct dentry *dentry) ++{ ++ struct ovl_entry *oe = dentry->d_fsdata; ++ ++ WARN_ON(!mutex_is_locked(&dentry->d_inode->i_mutex)); ++ return oe->version; ++} ++ ++bool ovl_is_whiteout(struct dentry *dentry) ++{ ++ int res; ++ char val; ++ ++ if (!dentry) ++ return false; ++ if (!dentry->d_inode) ++ return false; ++ if (!S_ISLNK(dentry->d_inode->i_mode)) ++ return false; ++ ++ res = vfs_getxattr(dentry, ovl_whiteout_xattr, &val, 1); ++ if (res == 1 && val == 'y') ++ return true; ++ ++ return false; ++} ++ ++static bool ovl_is_opaquedir(struct dentry *dentry) ++{ ++ int res; ++ char val; ++ ++ if (!S_ISDIR(dentry->d_inode->i_mode)) ++ return false; ++ ++ res = vfs_getxattr(dentry, ovl_opaque_xattr, &val, 1); ++ if (res == 1 && val == 'y') ++ return true; ++ ++ return false; ++} ++ ++static void ovl_entry_free(struct rcu_head *head) ++{ ++ struct ovl_entry *oe = container_of(head, struct ovl_entry, rcu); ++ kfree(oe); ++} ++ ++static void ovl_dentry_release(struct dentry *dentry) ++{ ++ struct ovl_entry *oe = dentry->d_fsdata; ++ ++ if (oe) { ++ dput(oe->__upperdentry); ++ dput(oe->__upperdentry); ++ dput(oe->lowerdentry); ++ call_rcu(&oe->rcu, ovl_entry_free); ++ } ++} ++ ++const struct dentry_operations ovl_dentry_operations = { ++ .d_release = ovl_dentry_release, ++}; ++ ++static struct ovl_entry *ovl_alloc_entry(void) ++{ ++ return kzalloc(sizeof(struct ovl_entry), GFP_KERNEL); ++} ++ ++static inline struct dentry *ovl_lookup_real(struct dentry *dir, ++ struct qstr *name) ++{ ++ struct dentry *dentry; ++ ++ mutex_lock(&dir->d_inode->i_mutex); ++ dentry = lookup_one_len(name->name, dir, name->len); ++ mutex_unlock(&dir->d_inode->i_mutex); ++ ++ if (IS_ERR(dentry)) { ++ if (PTR_ERR(dentry) == -ENOENT) ++ dentry = NULL; ++ } else if (!dentry->d_inode) { ++ dput(dentry); ++ dentry = NULL; ++ } ++ return dentry; ++} ++ ++static int ovl_do_lookup(struct dentry *dentry) ++{ ++ struct ovl_entry *oe; ++ struct dentry *upperdir; ++ struct dentry *lowerdir; ++ struct dentry *upperdentry = NULL; ++ struct dentry *lowerdentry = NULL; ++ struct inode *inode = NULL; ++ int err; ++ ++ err = -ENOMEM; ++ oe = ovl_alloc_entry(); ++ if (!oe) ++ goto out; ++ ++ upperdir = ovl_dentry_upper(dentry->d_parent); ++ lowerdir = ovl_dentry_lower(dentry->d_parent); ++ ++ if (upperdir) { ++ upperdentry = ovl_lookup_real(upperdir, &dentry->d_name); ++ err = PTR_ERR(upperdentry); ++ if (IS_ERR(upperdentry)) ++ goto out_put_dir; ++ ++ if (lowerdir && upperdentry && ++ (S_ISLNK(upperdentry->d_inode->i_mode) || ++ S_ISDIR(upperdentry->d_inode->i_mode))) { ++ const struct cred *old_cred; ++ struct cred *override_cred; ++ ++ err = -ENOMEM; ++ override_cred = prepare_creds(); ++ if (!override_cred) ++ goto out_dput_upper; ++ ++ /* CAP_SYS_ADMIN needed for getxattr */ ++ cap_raise(override_cred->cap_effective, CAP_SYS_ADMIN); ++ old_cred = override_creds(override_cred); ++ ++ if (ovl_is_opaquedir(upperdentry)) { ++ oe->opaque = true; ++ } else if (ovl_is_whiteout(upperdentry)) { ++ dput(upperdentry); ++ upperdentry = NULL; ++ oe->opaque = true; ++ } ++ revert_creds(old_cred); ++ put_cred(override_cred); ++ } ++ } ++ if (lowerdir && !oe->opaque) { ++ lowerdentry = ovl_lookup_real(lowerdir, &dentry->d_name); ++ err = PTR_ERR(lowerdentry); ++ if (IS_ERR(lowerdentry)) ++ goto out_dput_upper; ++ } ++ ++ if (lowerdentry && upperdentry && ++ (!S_ISDIR(upperdentry->d_inode->i_mode) || ++ !S_ISDIR(lowerdentry->d_inode->i_mode))) { ++ dput(lowerdentry); ++ lowerdentry = NULL; ++ oe->opaque = true; ++ } ++ ++ if (lowerdentry || upperdentry) { ++ struct dentry *realdentry; ++ ++ realdentry = upperdentry ? upperdentry : lowerdentry; ++ err = -ENOMEM; ++ inode = ovl_new_inode(dentry->d_sb, realdentry->d_inode->i_mode, ++ oe); ++ if (!inode) ++ goto out_dput; ++ ovl_copyattr(realdentry->d_inode, inode); ++ } ++ ++ if (upperdentry) ++ oe->__upperdentry = dget(upperdentry); ++ ++ if (lowerdentry) ++ oe->lowerdentry = lowerdentry; ++ ++ dentry->d_fsdata = oe; ++ dentry->d_op = &ovl_dentry_operations; ++ d_add(dentry, inode); ++ ++ return 0; ++ ++out_dput: ++ dput(lowerdentry); ++out_dput_upper: ++ dput(upperdentry); ++out_put_dir: ++ kfree(oe); ++out: ++ return err; ++} ++ ++struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry, ++ unsigned int flags) ++{ ++ int err = ovl_do_lookup(dentry); ++ ++ if (err) ++ return ERR_PTR(err); ++ ++ return NULL; ++} ++ ++struct file *ovl_path_open(struct path *path, int flags) ++{ ++ return dentry_open(path, flags, current_cred()); ++} ++ ++static void ovl_put_super(struct super_block *sb) ++{ ++ struct ovl_fs *ufs = sb->s_fs_info; ++ ++ if (!(sb->s_flags & MS_RDONLY)) ++ mnt_drop_write(ufs->upper_mnt); ++ ++ mntput(ufs->upper_mnt); ++ mntput(ufs->lower_mnt); ++ ++ kfree(ufs->config.lowerdir); ++ kfree(ufs->config.upperdir); ++ kfree(ufs); ++} ++ ++static int ovl_remount_fs(struct super_block *sb, int *flagsp, char *data) ++{ ++ int flags = *flagsp; ++ struct ovl_fs *ufs = sb->s_fs_info; ++ ++ /* When remounting rw or ro, we need to adjust the write access to the ++ * upper fs. ++ */ ++ if (((flags ^ sb->s_flags) & MS_RDONLY) == 0) ++ /* No change to readonly status */ ++ return 0; ++ ++ if (flags & MS_RDONLY) { ++ mnt_drop_write(ufs->upper_mnt); ++ return 0; ++ } else ++ return mnt_want_write(ufs->upper_mnt); ++} ++ ++/** ++ * ovl_statfs ++ * @sb: The overlayfs super block ++ * @buf: The struct kstatfs to fill in with stats ++ * ++ * Get the filesystem statistics. As writes always target the upper layer ++ * filesystem pass the statfs to the same filesystem. ++ */ ++static int ovl_statfs(struct dentry *dentry, struct kstatfs *buf) ++{ ++ struct ovl_fs *ofs = dentry->d_sb->s_fs_info; ++ struct dentry *root_dentry = dentry->d_sb->s_root; ++ struct path path; ++ int err; ++ ++ ovl_path_upper(root_dentry, &path); ++ ++ err = vfs_statfs(&path, buf); ++ if (!err) { ++ buf->f_namelen = max(buf->f_namelen, ofs->lower_namelen); ++ buf->f_type = OVERLAYFS_SUPER_MAGIC; ++ } ++ ++ return err; ++} ++ ++/** ++ * ovl_show_options ++ * ++ * Prints the mount options for a given superblock. ++ * Returns zero; does not fail. ++ */ ++static int ovl_show_options(struct seq_file *m, struct dentry *dentry) ++{ ++ struct super_block *sb = dentry->d_sb; ++ struct ovl_fs *ufs = sb->s_fs_info; ++ ++ seq_printf(m, ",lowerdir=%s", ufs->config.lowerdir); ++ seq_printf(m, ",upperdir=%s", ufs->config.upperdir); ++ return 0; ++} ++ ++static const struct super_operations ovl_super_operations = { ++ .put_super = ovl_put_super, ++ .remount_fs = ovl_remount_fs, ++ .statfs = ovl_statfs, ++ .show_options = ovl_show_options, ++}; ++ ++enum { ++ OPT_LOWERDIR, ++ OPT_UPPERDIR, ++ OPT_ERR, ++}; ++ ++static const match_table_t ovl_tokens = { ++ {OPT_LOWERDIR, "lowerdir=%s"}, ++ {OPT_UPPERDIR, "upperdir=%s"}, ++ {OPT_ERR, NULL} ++}; ++ ++static int ovl_parse_opt(char *opt, struct ovl_config *config) ++{ ++ char *p; ++ ++ config->upperdir = NULL; ++ config->lowerdir = NULL; ++ ++ while ((p = strsep(&opt, ",")) != NULL) { ++ int token; ++ substring_t args[MAX_OPT_ARGS]; ++ ++ if (!*p) ++ continue; ++ ++ token = match_token(p, ovl_tokens, args); ++ switch (token) { ++ case OPT_UPPERDIR: ++ kfree(config->upperdir); ++ config->upperdir = match_strdup(&args[0]); ++ if (!config->upperdir) ++ return -ENOMEM; ++ break; ++ ++ case OPT_LOWERDIR: ++ kfree(config->lowerdir); ++ config->lowerdir = match_strdup(&args[0]); ++ if (!config->lowerdir) ++ return -ENOMEM; ++ break; ++ ++ default: ++ return -EINVAL; ++ } ++ } ++ return 0; ++} ++ ++static int ovl_fill_super(struct super_block *sb, void *data, int silent) ++{ ++ struct path lowerpath; ++ struct path upperpath; ++ struct inode *root_inode; ++ struct dentry *root_dentry; ++ struct ovl_entry *oe; ++ struct ovl_fs *ufs; ++ struct kstatfs statfs; ++ int err; ++ ++ err = -ENOMEM; ++ ufs = kmalloc(sizeof(struct ovl_fs), GFP_KERNEL); ++ if (!ufs) ++ goto out; ++ ++ err = ovl_parse_opt((char *) data, &ufs->config); ++ if (err) ++ goto out_free_ufs; ++ ++ err = -EINVAL; ++ if (!ufs->config.upperdir || !ufs->config.lowerdir) { ++ pr_err("overlayfs: missing upperdir or lowerdir\n"); ++ goto out_free_config; ++ } ++ ++ oe = ovl_alloc_entry(); ++ if (oe == NULL) ++ goto out_free_config; ++ ++ err = kern_path(ufs->config.upperdir, LOOKUP_FOLLOW, &upperpath); ++ if (err) ++ goto out_free_oe; ++ ++ err = kern_path(ufs->config.lowerdir, LOOKUP_FOLLOW, &lowerpath); ++ if (err) ++ goto out_put_upperpath; ++ ++ err = -ENOTDIR; ++ if (!S_ISDIR(upperpath.dentry->d_inode->i_mode) || ++ !S_ISDIR(lowerpath.dentry->d_inode->i_mode)) ++ goto out_put_lowerpath; ++ ++ err = vfs_statfs(&lowerpath, &statfs); ++ if (err) { ++ pr_err("overlayfs: statfs failed on lowerpath\n"); ++ goto out_put_lowerpath; ++ } ++ ufs->lower_namelen = statfs.f_namelen; ++ ++ sb->s_stack_depth = max(upperpath.mnt->mnt_sb->s_stack_depth, ++ lowerpath.mnt->mnt_sb->s_stack_depth) + 1; ++ ++ err = -EINVAL; ++ if (sb->s_stack_depth > FILESYSTEM_MAX_STACK_DEPTH) { ++ pr_err("overlayfs: maximum fs stacking depth exceeded\n"); ++ goto out_put_lowerpath; ++ } ++ ++ ++ ufs->upper_mnt = clone_private_mount(&upperpath); ++ err = PTR_ERR(ufs->upper_mnt); ++ if (IS_ERR(ufs->upper_mnt)) { ++ pr_err("overlayfs: failed to clone upperpath\n"); ++ goto out_put_lowerpath; ++ } ++ ++ ufs->lower_mnt = clone_private_mount(&lowerpath); ++ err = PTR_ERR(ufs->lower_mnt); ++ if (IS_ERR(ufs->lower_mnt)) { ++ pr_err("overlayfs: failed to clone lowerpath\n"); ++ goto out_put_upper_mnt; ++ } ++ ++ /* ++ * Make lower_mnt R/O. That way fchmod/fchown on lower file ++ * will fail instead of modifying lower fs. ++ */ ++ ufs->lower_mnt->mnt_flags |= MNT_READONLY; ++ ++ /* If the upper fs is r/o, we mark overlayfs r/o too */ ++ if (ufs->upper_mnt->mnt_sb->s_flags & MS_RDONLY) ++ sb->s_flags |= MS_RDONLY; ++ ++ if (!(sb->s_flags & MS_RDONLY)) { ++ err = mnt_want_write(ufs->upper_mnt); ++ if (err) ++ goto out_put_lower_mnt; ++ } ++ ++ err = -ENOMEM; ++ root_inode = ovl_new_inode(sb, S_IFDIR, oe); ++ if (!root_inode) ++ goto out_drop_write; ++ ++ root_dentry = d_make_root(root_inode); ++ if (!root_dentry) ++ goto out_drop_write; ++ ++ mntput(upperpath.mnt); ++ mntput(lowerpath.mnt); ++ ++ oe->__upperdentry = dget(upperpath.dentry); ++ oe->lowerdentry = lowerpath.dentry; ++ ++ root_dentry->d_fsdata = oe; ++ root_dentry->d_op = &ovl_dentry_operations; ++ ++ sb->s_magic = OVERLAYFS_SUPER_MAGIC; ++ sb->s_op = &ovl_super_operations; ++ sb->s_root = root_dentry; ++ sb->s_fs_info = ufs; ++ ++ return 0; ++ ++out_drop_write: ++ if (!(sb->s_flags & MS_RDONLY)) ++ mnt_drop_write(ufs->upper_mnt); ++out_put_lower_mnt: ++ mntput(ufs->lower_mnt); ++out_put_upper_mnt: ++ mntput(ufs->upper_mnt); ++out_put_lowerpath: ++ path_put(&lowerpath); ++out_put_upperpath: ++ path_put(&upperpath); ++out_free_oe: ++ kfree(oe); ++out_free_config: ++ kfree(ufs->config.lowerdir); ++ kfree(ufs->config.upperdir); ++out_free_ufs: ++ kfree(ufs); ++out: ++ return err; ++} ++ ++static struct dentry *ovl_mount(struct file_system_type *fs_type, int flags, ++ const char *dev_name, void *raw_data) ++{ ++ return mount_nodev(fs_type, flags, raw_data, ovl_fill_super); ++} ++ ++static struct file_system_type ovl_fs_type = { ++ .owner = THIS_MODULE, ++ .name = "overlayfs", ++ .mount = ovl_mount, ++ .kill_sb = kill_anon_super, ++}; ++MODULE_ALIAS_FS("overlayfs"); ++ ++static int __init ovl_init(void) ++{ ++ return register_filesystem(&ovl_fs_type); ++} ++ ++static void __exit ovl_exit(void) ++{ ++ unregister_filesystem(&ovl_fs_type); ++} ++ ++module_init(ovl_init); ++module_exit(ovl_exit); +diff --git a/fs/splice.c b/fs/splice.c +index 9eca476..8d415fc 100644 +--- a/fs/splice.c ++++ b/fs/splice.c +@@ -1312,6 +1312,7 @@ long do_splice_direct(struct file *in, loff_t *ppos, struct file *out, + + return ret; + } ++EXPORT_SYMBOL(do_splice_direct); + + static int splice_pipe_to_pipe(struct pipe_inode_info *ipipe, + struct pipe_inode_info *opipe, +diff --git a/include/linux/fs.h b/include/linux/fs.h +index 65c2be2..72d04f8 100644 +--- a/include/linux/fs.h ++++ b/include/linux/fs.h +@@ -244,6 +244,12 @@ struct iattr { + */ + #include + ++/* ++ * Maximum number of layers of fs stack. Needs to be limited to ++ * prevent kernel stack overflow ++ */ ++#define FILESYSTEM_MAX_STACK_DEPTH 2 ++ + /** + * enum positive_aop_returns - aop return codes with specific semantics + * +@@ -1322,6 +1328,11 @@ struct super_block { + + /* Being remounted read-only */ + int s_readonly_remount; ++ ++ /* ++ * Indicates how deep in a filesystem stack this SB is ++ */ ++ int s_stack_depth; + }; + + /* superblock cache pruning functions */ +@@ -1575,6 +1586,7 @@ struct inode_operations { + int (*atomic_open)(struct inode *, struct dentry *, + struct file *, unsigned open_flag, + umode_t create_mode, int *opened); ++ int (*dentry_open)(struct dentry *, struct file *, const struct cred *); + } ____cacheline_aligned; + + ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector, +@@ -2008,6 +2020,7 @@ extern struct file *file_open_name(struct filename *, int, umode_t); + extern struct file *filp_open(const char *, int, umode_t); + extern struct file *file_open_root(struct dentry *, struct vfsmount *, + const char *, int); ++extern int vfs_open(const struct path *, struct file *, const struct cred *); + extern struct file * dentry_open(const struct path *, int, const struct cred *); + extern int filp_close(struct file *, fl_owner_t id); + +@@ -2208,6 +2221,7 @@ extern sector_t bmap(struct inode *, sector_t); + #endif + extern int notify_change(struct dentry *, struct iattr *); + extern int inode_permission(struct inode *, int); ++extern int __inode_permission(struct inode *, int); + extern int generic_permission(struct inode *, int); + + static inline bool execute_ok(struct inode *inode) +@@ -2414,6 +2428,9 @@ extern ssize_t generic_file_splice_write(struct pipe_inode_info *, + struct file *, loff_t *, size_t, unsigned int); + extern ssize_t generic_splice_sendpage(struct pipe_inode_info *pipe, + struct file *out, loff_t *, size_t len, unsigned int flags); ++extern long do_splice_direct(struct file *in, loff_t *ppos, struct file *out, ++ loff_t *opos, size_t len, unsigned int flags); ++ + + extern void + file_ra_state_init(struct file_ra_state *ra, struct address_space *mapping); +diff --git a/include/linux/mount.h b/include/linux/mount.h +index 73005f9..435f281 100644 +--- a/include/linux/mount.h ++++ b/include/linux/mount.h +@@ -68,6 +68,9 @@ extern void mnt_pin(struct vfsmount *mnt); + extern void mnt_unpin(struct vfsmount *mnt); + extern int __mnt_is_readonly(struct vfsmount *mnt); + ++struct path; ++extern struct vfsmount *clone_private_mount(struct path *path); ++ + struct file_system_type; + extern struct vfsmount *vfs_kern_mount(struct file_system_type *type, + int flags, const char *name, From 13427f428338abfb155d763eb1347c6a6a5dd495 Mon Sep 17 00:00:00 2001 From: Igor Zalatov Date: Thu, 22 Apr 2021 10:01:34 +0300 Subject: [PATCH 5/5] Update build scripts --- .../unknown_unknown_xm530_openipc_defconfig | 2 +- .../script/{loadxm530_64M => load_xiongmai} | 2 +- .../files/script/loadxm530_128M | 143 ------------------ .../xiongmai-osdrv-xm530.mk | 10 +- 4 files changed, 7 insertions(+), 150 deletions(-) rename br-ext-chip-xiongmai/package/xiongmai-osdrv-xm530/files/script/{loadxm530_64M => load_xiongmai} (98%) delete mode 100755 br-ext-chip-xiongmai/package/xiongmai-osdrv-xm530/files/script/loadxm530_128M diff --git a/br-ext-chip-xiongmai/configs/unknown_unknown_xm530_openipc_defconfig b/br-ext-chip-xiongmai/configs/unknown_unknown_xm530_openipc_defconfig index b3cb5e48..0e881c13 100644 --- a/br-ext-chip-xiongmai/configs/unknown_unknown_xm530_openipc_defconfig +++ b/br-ext-chip-xiongmai/configs/unknown_unknown_xm530_openipc_defconfig @@ -44,7 +44,7 @@ BR2_GLOBAL_PATCH_DIR="$(TOPDIR)/../general/package/patches" BR2_PACKAGE_BUSYBOX_CONFIG="$(TOPDIR)/../general/package/configs/busybox.config" BR2_PACKAGE_DROPBEAR=y BR2_PACKAGE_FWPRINTENV_NG=y -# BR2_PACKAGE_XIONGMAI_OSDRV_XM530 is not set +BR2_PACKAGE_XIONGMAI_OSDRV_XM530=y BR2_PACKAGE_IPCTOOL=y BR2_PACKAGE_JSON_C=y BR2_PACKAGE_LAME=y diff --git a/br-ext-chip-xiongmai/package/xiongmai-osdrv-xm530/files/script/loadxm530_64M b/br-ext-chip-xiongmai/package/xiongmai-osdrv-xm530/files/script/load_xiongmai similarity index 98% rename from br-ext-chip-xiongmai/package/xiongmai-osdrv-xm530/files/script/loadxm530_64M rename to br-ext-chip-xiongmai/package/xiongmai-osdrv-xm530/files/script/load_xiongmai index 9cc4c437..527ff344 100755 --- a/br-ext-chip-xiongmai/package/xiongmai-osdrv-xm530/files/script/loadxm530_64M +++ b/br-ext-chip-xiongmai/package/xiongmai-osdrv-xm530/files/script/load_xiongmai @@ -5,8 +5,8 @@ # default : rmmod all moules and then insmod them # -#内存和地址单位M MEM_ALL=64 +#MEM_ALL=128 MEM_START=0x800 MEM_SAMALL_LIN=0x1 diff --git a/br-ext-chip-xiongmai/package/xiongmai-osdrv-xm530/files/script/loadxm530_128M b/br-ext-chip-xiongmai/package/xiongmai-osdrv-xm530/files/script/loadxm530_128M deleted file mode 100755 index a6beab9d..00000000 --- a/br-ext-chip-xiongmai/package/xiongmai-osdrv-xm530/files/script/loadxm530_128M +++ /dev/null @@ -1,143 +0,0 @@ -#!/bin/sh -# Useage: ./loadxm530 [ -r|-i|-a ] -# -r : rmmod all modules -# -i : insmod all modules -# default : rmmod all moules and then insmod them -# - -#内存和地址单位M -MEM_ALL=128 -MEM_START=0x800 -MEM_SAMALL_LIN=0x1 - -MEM_OS=`cat /proc/cmdline | awk '{print $1}' | sed -e 's/mem=//' -e 's/M//'` -MEM_LEN=`echo "$MEM_ALL $MEM_OS"|awk '{printf("0x%03x00000",$1-$2)}'` -MEM_START=`echo "$MEM_START $MEM_SAMALL_LIN $MEM_OS"|awk '{printf("0x%03x00000",$1+$2*$3)}'` -echo MEM_START=$MEM_START MEM_LEN=$MEM_LEN - -VI_BUFF=2 - -report_error() -{ - echo "******* Error: There's something wrong, please check! *****" - exit 1 -} - -insert_audio() -{ - echo "insert audio" - insmod xm_i2s.ko - insmod acodec.ko -} - -insert_h265() -{ - echo "insert h265" - insmod mve_rsrc.ko - insmod mve_base.ko -} - -insert_vo() -{ - regs 20000000 1 - regs 20000010 12042d02 - regs 20000044 0x2777 - regs 20000048 0x3 - regs 2000004C 01020102 - regs 20000000 0 - - insmod xm530_vo.ko - insmod xm530_vdec.ko -} - -remove_audio() -{ - echo "remove audio" - rmmod acodec - rmmod xm_i2s -} - -insert_sns() -{ - #Sensor clock 27MHz - #regs 0x2000002c 1; - #regs 0x2000000c 0x10110010; - #regs 0x20000010 0x901F0010; - #regs 0x20000014 0x01120000; - #regs 0x2000002c 0; - #sleep 0.1; - insmod xm_i2c.ko; -} - -remove_sns() -{ - rmmod xm_i2c &> /dev/null - rmmod ssp_sony &> /dev/null -} - -insert_ko() -{ -# driver load - insert_sns > /dev/null - insmod mmz.ko mmz_start=$MEM_START mmz_size=$MEM_LEN - insmod xm530_vi.ko buffer=$VI_BUFF - insmod xm530_isp.ko - insmod xm530_rgn.ko - insmod xm530_h264.ko - insmod xm_rtc.ko - #insmod xm_wdt.ko - insmod log.ko - - insert_audio - #insert_h265 - #insert_vo -} - -remove_ko() -{ - #remove_audio - #rmmod xm_wdt - #rmmod xm_rtc - rmmod xm530_h264 - rmmod xm530_rgn - rmmod xm530_isp - rmmod xm530_vi - rmmod mmz - - remove_sns -} - -load_usage() -{ - echo "Usage: ./loadxm530 [-option]" - echo "options:" - echo " -i insert modules" - echo " -r remove modules" - echo " -h help information" - echo -e "for example: ./loadxm530 -i\n" -} - -# load module. -if [ "$1" = "-i" ] -then -cd /lib/modules/3.10.103/xiongmai -insert_ko -fi - -if [ "$1" = "-r" ] -then -remove_ko -fi - -if [ "$1" = "-h" ] -then -load_usage -exit -fi - -if [ $# -eq 0 ] || [ "$1" = "-a" ] -then -remove_ko -insert_ko -fi - diff --git a/br-ext-chip-xiongmai/package/xiongmai-osdrv-xm530/xiongmai-osdrv-xm530.mk b/br-ext-chip-xiongmai/package/xiongmai-osdrv-xm530/xiongmai-osdrv-xm530.mk index cd978d58..6c21cbf7 100644 --- a/br-ext-chip-xiongmai/package/xiongmai-osdrv-xm530/xiongmai-osdrv-xm530.mk +++ b/br-ext-chip-xiongmai/package/xiongmai-osdrv-xm530/xiongmai-osdrv-xm530.mk @@ -30,12 +30,12 @@ define XIONGMAI_OSDRV_XM530_INSTALL_TARGET_CMDS $(INSTALL) -m 755 -d $(TARGET_DIR)/etc/sensors # $(INSTALL) -m 644 -t $(TARGET_DIR)/etc/sensors $(BR2_EXTERNAL_XIONGMAI_PATH)/package/xiongmai-osdrv-xm530/files/sensor/config/*.ini - $(INSTALL) -m 755 -d $(TARGET_DIR)/lib/modules/3.10.103/xiongmai - $(INSTALL) -m 644 -t $(TARGET_DIR)/lib/modules/3.10.103/xiongmai $(BR2_EXTERNAL_XIONGMAI_PATH)/package/xiongmai-osdrv-xm530/files/kmod/*.ko - $(INSTALL) -m 644 -t $(TARGET_DIR)/lib/modules/3.10.103/xiongmai $(BR2_EXTERNAL_XIONGMAI_PATH)/package/xiongmai-osdrv-xm530/files/kmod/usb/*.ko + $(INSTALL) -m 755 -d $(TARGET_DIR)/lib/modules/3.10.103+/xiongmai + $(INSTALL) -m 644 -t $(TARGET_DIR)/lib/modules/3.10.103+/xiongmai $(BR2_EXTERNAL_XIONGMAI_PATH)/package/xiongmai-osdrv-xm530/files/kmod/*.ko + $(INSTALL) -m 644 -t $(TARGET_DIR)/lib/modules/3.10.103+/xiongmai $(BR2_EXTERNAL_XIONGMAI_PATH)/package/xiongmai-osdrv-xm530/files/kmod/usb/*.ko - # $(INSTALL) -m 755 -d $(TARGET_DIR)/usr/bin - # $(INSTALL) -m 755 -t $(TARGET_DIR)/usr/bin $(BR2_EXTERNAL_XIONGMAI_PATH)/package/xiongmai-osdrv-xm530/files/script/* + $(INSTALL) -m 755 -d $(TARGET_DIR)/usr/bin + $(INSTALL) -m 755 -t $(TARGET_DIR)/usr/bin $(BR2_EXTERNAL_XIONGMAI_PATH)/package/xiongmai-osdrv-xm530/files/script/* # $(INSTALL) -m 755 -d $(TARGET_DIR)/usr/lib/fonts # $(INSTALL) -m 644 -t $(TARGET_DIR)/usr/lib/fonts $(BR2_EXTERNAL_XIONGMAI_PATH)/package/xiongmai-osdrv-xm530/files/fonts/*.bin