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mirror_zfs/module/Kbuild.in
Don Brady 5caeef02fa
RAID-Z expansion feature 
This feature allows disks to be added one at a time to a RAID-Z group,
expanding its capacity incrementally.  This feature is especially useful
for small pools (typically with only one RAID-Z group), where there
isn't sufficient hardware to add capacity by adding a whole new RAID-Z
group (typically doubling the number of disks).

== Initiating expansion ==

A new device (disk) can be attached to an existing RAIDZ vdev, by
running `zpool attach POOL raidzP-N NEW_DEVICE`, e.g. `zpool attach tank
raidz2-0 sda`.  The new device will become part of the RAIDZ group.  A
"raidz expansion" will be initiated, and the new device will contribute
additional space to the RAIDZ group once the expansion completes.

The `feature@raidz_expansion` on-disk feature flag must be `enabled` to
initiate an expansion, and it remains `active` for the life of the pool.
In other words, pools with expanded RAIDZ vdevs can not be imported by
older releases of the ZFS software.

== During expansion ==

The expansion entails reading all allocated space from existing disks in
the RAIDZ group, and rewriting it to the new disks in the RAIDZ group
(including the newly added device).

The expansion progress can be monitored with `zpool status`.

Data redundancy is maintained during (and after) the expansion.  If a
disk fails while the expansion is in progress, the expansion pauses
until the health of the RAIDZ vdev is restored (e.g. by replacing the
failed disk and waiting for reconstruction to complete).

The pool remains accessible during expansion.  Following a reboot or
export/import, the expansion resumes where it left off.

== After expansion ==

When the expansion completes, the additional space is available for use,
and is reflected in the `available` zfs property (as seen in `zfs list`,
`df`, etc).

Expansion does not change the number of failures that can be tolerated
without data loss (e.g. a RAIDZ2 is still a RAIDZ2 even after
expansion).

A RAIDZ vdev can be expanded multiple times.

After the expansion completes, old blocks remain with their old
data-to-parity ratio (e.g. 5-wide RAIDZ2, has 3 data to 2 parity), but
distributed among the larger set of disks.  New blocks will be written
with the new data-to-parity ratio (e.g. a 5-wide RAIDZ2 which has been
expanded once to 6-wide, has 4 data to 2 parity).  However, the RAIDZ
vdev's "assumed parity ratio" does not change, so slightly less space
than is expected may be reported for newly-written blocks, according to
`zfs list`, `df`, `ls -s`, and similar tools.

Sponsored-by: The FreeBSD Foundation
Sponsored-by: iXsystems, Inc.
Sponsored-by: vStack
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Mark Maybee <mark.maybee@delphix.com>
Authored-by: Matthew Ahrens <mahrens@delphix.com>
Contributions-by: Fedor Uporov <fuporov.vstack@gmail.com>
Contributions-by: Stuart Maybee <stuart.maybee@comcast.net>
Contributions-by: Thorsten Behrens <tbehrens@outlook.com>
Contributions-by: Fmstrat <nospam@nowsci.com>
Contributions-by: Don Brady <dev.fs.zfs@gmail.com>
Signed-off-by: Don Brady <dev.fs.zfs@gmail.com>
Closes #15022
2023-11-08 10:19:41 -08:00

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# When integrated in to a monolithic kernel the spl module must appear
# first. This ensures its module initialization function is run before
# any of the other module initialization functions which depend on it.
ZFS_MODULE_CFLAGS += -std=gnu99 -Wno-declaration-after-statement
ZFS_MODULE_CFLAGS += -Wmissing-prototypes
ZFS_MODULE_CFLAGS += @KERNEL_DEBUG_CFLAGS@ @NO_FORMAT_ZERO_LENGTH@
ifneq ($(KBUILD_EXTMOD),)
zfs_include = @abs_top_srcdir@/include
icp_include = @abs_srcdir@/icp/include
zstd_include = @abs_srcdir@/zstd/include
ZFS_MODULE_CFLAGS += -include @abs_top_builddir@/zfs_config.h
ZFS_MODULE_CFLAGS += -I@abs_top_builddir@/include
src = @abs_srcdir@
obj = @abs_builddir@
else
zfs_include = $(srctree)/include/zfs
icp_include = $(srctree)/$(src)/icp/include
zstd_include = $(srctree)/$(src)/zstd/include
ZFS_MODULE_CFLAGS += -include $(zfs_include)/zfs_config.h
endif
ZFS_MODULE_CFLAGS += -I$(zfs_include)/os/linux/kernel
ZFS_MODULE_CFLAGS += -I$(zfs_include)/os/linux/spl
ZFS_MODULE_CFLAGS += -I$(zfs_include)/os/linux/zfs
ZFS_MODULE_CFLAGS += -I$(zfs_include)
ZFS_MODULE_CPPFLAGS += -D_KERNEL
ZFS_MODULE_CPPFLAGS += @KERNEL_DEBUG_CPPFLAGS@
# KASAN enables -Werror=frame-larger-than=1024, which
# breaks oh so many parts of our build.
ifeq ($(CONFIG_KASAN),y)
ZFS_MODULE_CFLAGS += -Wno-error=frame-larger-than=
endif
# Generated binary search code is particularly bad with this optimization.
# Oddly, range_tree.c is not affected when unrolling is not done and dsl_scan.c
# is not affected when unrolling is done.
# Disable it until the following upstream issue is resolved:
# https://github.com/llvm/llvm-project/issues/62790
ifeq ($(CONFIG_X86),y)
ifeq ($(CONFIG_CC_IS_CLANG),y)
CFLAGS_zfs/dsl_scan.o += -mllvm -x86-cmov-converter=false
CFLAGS_zfs/metaslab.o += -mllvm -x86-cmov-converter=false
CFLAGS_zfs/range_tree.o += -mllvm -x86-cmov-converter=false
CFLAGS_zfs/zap_micro.o += -mllvm -x86-cmov-converter=false
endif
endif
ifneq ($(KBUILD_EXTMOD),)
@CONFIG_QAT_TRUE@ZFS_MODULE_CFLAGS += -I@QAT_SRC@/include
@CONFIG_QAT_TRUE@KBUILD_EXTRA_SYMBOLS += @QAT_SYMBOLS@
endif
asflags-y := $(ZFS_MODULE_CFLAGS) $(ZFS_MODULE_CPPFLAGS)
ccflags-y := $(ZFS_MODULE_CFLAGS) $(ZFS_MODULE_CPPFLAGS)
ifeq ($(CONFIG_ARM64),y)
CFLAGS_REMOVE_zcommon/zfs_fletcher_aarch64_neon.o += -mgeneral-regs-only
CFLAGS_REMOVE_zfs/vdev_raidz_math_aarch64_neon.o += -mgeneral-regs-only
CFLAGS_REMOVE_zfs/vdev_raidz_math_aarch64_neonx2.o += -mgeneral-regs-only
endif
# Suppress unused-value warnings in sparc64 architecture headers
ccflags-$(CONFIG_SPARC64) += -Wno-unused-value
obj-$(CONFIG_ZFS) := spl.o zfs.o
SPL_OBJS := \
spl-atomic.o \
spl-condvar.o \
spl-cred.o \
spl-err.o \
spl-generic.o \
spl-kmem-cache.o \
spl-kmem.o \
spl-kstat.o \
spl-proc.o \
spl-procfs-list.o \
spl-taskq.o \
spl-thread.o \
spl-trace.o \
spl-tsd.o \
spl-vmem.o \
spl-xdr.o \
spl-zlib.o \
spl-zone.o
spl-objs += $(addprefix os/linux/spl/,$(SPL_OBJS))
zfs-objs += avl/avl.o
ICP_OBJS := \
algs/aes/aes_impl.o \
algs/aes/aes_impl_generic.o \
algs/aes/aes_modes.o \
algs/blake3/blake3.o \
algs/blake3/blake3_generic.o \
algs/blake3/blake3_impl.o \
algs/edonr/edonr.o \
algs/modes/cbc.o \
algs/modes/ccm.o \
algs/modes/ctr.o \
algs/modes/ecb.o \
algs/modes/gcm.o \
algs/modes/gcm_generic.o \
algs/modes/modes.o \
algs/sha2/sha2_generic.o \
algs/sha2/sha256_impl.o \
algs/sha2/sha512_impl.o \
algs/skein/skein.o \
algs/skein/skein_block.o \
algs/skein/skein_iv.o \
api/kcf_cipher.o \
api/kcf_ctxops.o \
api/kcf_mac.o \
core/kcf_callprov.o \
core/kcf_mech_tabs.o \
core/kcf_prov_lib.o \
core/kcf_prov_tabs.o \
core/kcf_sched.o \
illumos-crypto.o \
io/aes.o \
io/sha2_mod.o \
io/skein_mod.o \
spi/kcf_spi.o
ICP_OBJS_X86_64 := \
asm-x86_64/aes/aes_aesni.o \
asm-x86_64/aes/aes_amd64.o \
asm-x86_64/aes/aeskey.o \
asm-x86_64/blake3/blake3_avx2.o \
asm-x86_64/blake3/blake3_avx512.o \
asm-x86_64/blake3/blake3_sse2.o \
asm-x86_64/blake3/blake3_sse41.o \
asm-x86_64/sha2/sha256-x86_64.o \
asm-x86_64/sha2/sha512-x86_64.o \
asm-x86_64/modes/aesni-gcm-x86_64.o \
asm-x86_64/modes/gcm_pclmulqdq.o \
asm-x86_64/modes/ghash-x86_64.o
ICP_OBJS_X86 := \
algs/aes/aes_impl_aesni.o \
algs/aes/aes_impl_x86-64.o \
algs/modes/gcm_pclmulqdq.o
ICP_OBJS_ARM := \
asm-arm/sha2/sha256-armv7.o \
asm-arm/sha2/sha512-armv7.o
ICP_OBJS_ARM64 := \
asm-aarch64/blake3/b3_aarch64_sse2.o \
asm-aarch64/blake3/b3_aarch64_sse41.o \
asm-aarch64/sha2/sha256-armv8.o \
asm-aarch64/sha2/sha512-armv8.o
ICP_OBJS_PPC_PPC64 := \
asm-ppc64/blake3/b3_ppc64le_sse2.o \
asm-ppc64/blake3/b3_ppc64le_sse41.o \
asm-ppc64/sha2/sha256-p8.o \
asm-ppc64/sha2/sha512-p8.o \
asm-ppc64/sha2/sha256-ppc.o \
asm-ppc64/sha2/sha512-ppc.o
zfs-objs += $(addprefix icp/,$(ICP_OBJS))
zfs-$(CONFIG_X86) += $(addprefix icp/,$(ICP_OBJS_X86))
zfs-$(CONFIG_UML_X86)+= $(addprefix icp/,$(ICP_OBJS_X86))
zfs-$(CONFIG_X86_64) += $(addprefix icp/,$(ICP_OBJS_X86_64))
zfs-$(CONFIG_ARM) += $(addprefix icp/,$(ICP_OBJS_ARM))
zfs-$(CONFIG_ARM64) += $(addprefix icp/,$(ICP_OBJS_ARM64))
zfs-$(CONFIG_PPC) += $(addprefix icp/,$(ICP_OBJS_PPC_PPC64))
zfs-$(CONFIG_PPC64) += $(addprefix icp/,$(ICP_OBJS_PPC_PPC64))
$(addprefix $(obj)/icp/,$(ICP_OBJS) $(ICP_OBJS_X86) $(ICP_OBJS_X86_64) \
$(ICP_OBJS_ARM64) $(ICP_OBJS_PPC_PPC64)) : asflags-y += -I$(icp_include) -I$(zfs_include)/os/linux/spl -I$(zfs_include)
$(addprefix $(obj)/icp/,$(ICP_OBJS) $(ICP_OBJS_X86) $(ICP_OBJS_X86_64) \
$(ICP_OBJS_ARM64) $(ICP_OBJS_PPC_PPC64)) : ccflags-y += -I$(icp_include) -I$(zfs_include)/os/linux/spl -I$(zfs_include)
# Suppress objtool "return with modified stack frame" warnings.
OBJECT_FILES_NON_STANDARD_aesni-gcm-x86_64.o := y
# Suppress objtool "unsupported stack pointer realignment" warnings.
# See #6950 for the reasoning.
OBJECT_FILES_NON_STANDARD_sha256-x86_64.o := y
OBJECT_FILES_NON_STANDARD_sha512-x86_64.o := y
LUA_OBJS := \
lapi.o \
lauxlib.o \
lbaselib.o \
lcode.o \
lcompat.o \
lcorolib.o \
lctype.o \
ldebug.o \
ldo.o \
lfunc.o \
lgc.o \
llex.o \
lmem.o \
lobject.o \
lopcodes.o \
lparser.o \
lstate.o \
lstring.o \
lstrlib.o \
ltable.o \
ltablib.o \
ltm.o \
lvm.o \
lzio.o \
setjmp/setjmp.o
zfs-objs += $(addprefix lua/,$(LUA_OBJS))
NVPAIR_OBJS := \
fnvpair.o \
nvpair.o \
nvpair_alloc_fixed.o \
nvpair_alloc_spl.o
zfs-objs += $(addprefix nvpair/,$(NVPAIR_OBJS))
UNICODE_OBJS := \
u8_textprep.o \
uconv.o
zfs-objs += $(addprefix unicode/,$(UNICODE_OBJS))
ZCOMMON_OBJS := \
cityhash.o \
zfeature_common.o \
zfs_comutil.o \
zfs_deleg.o \
zfs_fletcher.o \
zfs_fletcher_superscalar.o \
zfs_fletcher_superscalar4.o \
zfs_namecheck.o \
zfs_prop.o \
zpool_prop.o \
zprop_common.o
ZCOMMON_OBJS_X86 := \
zfs_fletcher_avx512.o \
zfs_fletcher_intel.o \
zfs_fletcher_sse.o
ZCOMMON_OBJS_ARM64 := \
zfs_fletcher_aarch64_neon.o
zfs-objs += $(addprefix zcommon/,$(ZCOMMON_OBJS))
zfs-$(CONFIG_X86) += $(addprefix zcommon/,$(ZCOMMON_OBJS_X86))
zfs-$(CONFIG_UML_X86)+= $(addprefix zcommon/,$(ZCOMMON_OBJS_X86))
zfs-$(CONFIG_ARM64) += $(addprefix zcommon/,$(ZCOMMON_OBJS_ARM64))
# Zstd uses -O3 by default, so we should follow
ZFS_ZSTD_FLAGS := -O3
# -fno-tree-vectorize gets set for gcc in zstd/common/compiler.h
# Set it for other compilers, too.
ZFS_ZSTD_FLAGS += -fno-tree-vectorize
# SSE register return with SSE disabled if -march=znverX is passed
ZFS_ZSTD_FLAGS += -U__BMI__
# Quiet warnings about frame size due to unused code in unmodified zstd lib
ZFS_ZSTD_FLAGS += -Wframe-larger-than=20480
ZSTD_OBJS := \
zfs_zstd.o \
zstd_sparc.o
ZSTD_UPSTREAM_OBJS := \
lib/common/entropy_common.o \
lib/common/error_private.o \
lib/common/fse_decompress.o \
lib/common/pool.o \
lib/common/zstd_common.o \
lib/compress/fse_compress.o \
lib/compress/hist.o \
lib/compress/huf_compress.o \
lib/compress/zstd_compress.o \
lib/compress/zstd_compress_literals.o \
lib/compress/zstd_compress_sequences.o \
lib/compress/zstd_compress_superblock.o \
lib/compress/zstd_double_fast.o \
lib/compress/zstd_fast.o \
lib/compress/zstd_lazy.o \
lib/compress/zstd_ldm.o \
lib/compress/zstd_opt.o \
lib/decompress/huf_decompress.o \
lib/decompress/zstd_ddict.o \
lib/decompress/zstd_decompress.o \
lib/decompress/zstd_decompress_block.o
zfs-objs += $(addprefix zstd/,$(ZSTD_OBJS) $(ZSTD_UPSTREAM_OBJS))
# Disable aarch64 neon SIMD instructions for kernel mode
$(addprefix $(obj)/zstd/,$(ZSTD_OBJS) $(ZSTD_UPSTREAM_OBJS)) : ccflags-y += -I$(zstd_include) $(ZFS_ZSTD_FLAGS)
$(addprefix $(obj)/zstd/,$(ZSTD_OBJS) $(ZSTD_UPSTREAM_OBJS)) : asflags-y += -I$(zstd_include)
$(addprefix $(obj)/zstd/,$(ZSTD_UPSTREAM_OBJS)) : ccflags-y += -include $(zstd_include)/aarch64_compat.h -include $(zstd_include)/zstd_compat_wrapper.h -Wp,-w
$(obj)/zstd/zfs_zstd.o : ccflags-y += -include $(zstd_include)/zstd_compat_wrapper.h
ZFS_OBJS := \
abd.o \
aggsum.o \
arc.o \
blake3_zfs.o \
blkptr.o \
bplist.o \
bpobj.o \
bptree.o \
bqueue.o \
brt.o \
btree.o \
dataset_kstats.o \
dbuf.o \
dbuf_stats.o \
ddt.o \
ddt_zap.o \
dmu.o \
dmu_diff.o \
dmu_object.o \
dmu_objset.o \
dmu_recv.o \
dmu_redact.o \
dmu_send.o \
dmu_traverse.o \
dmu_tx.o \
dmu_zfetch.o \
dnode.o \
dnode_sync.o \
dsl_bookmark.o \
dsl_crypt.o \
dsl_dataset.o \
dsl_deadlist.o \
dsl_deleg.o \
dsl_destroy.o \
dsl_dir.o \
dsl_pool.o \
dsl_prop.o \
dsl_scan.o \
dsl_synctask.o \
dsl_userhold.o \
edonr_zfs.o \
fm.o \
gzip.o \
hkdf.o \
lz4.o \
lz4_zfs.o \
lzjb.o \
metaslab.o \
mmp.o \
multilist.o \
objlist.o \
pathname.o \
range_tree.o \
refcount.o \
rrwlock.o \
sa.o \
sha2_zfs.o \
skein_zfs.o \
spa.o \
spa_checkpoint.o \
spa_config.o \
spa_errlog.o \
spa_history.o \
spa_log_spacemap.o \
spa_misc.o \
spa_stats.o \
space_map.o \
space_reftree.o \
txg.o \
uberblock.o \
unique.o \
vdev.o \
vdev_draid.o \
vdev_draid_rand.o \
vdev_indirect.o \
vdev_indirect_births.o \
vdev_indirect_mapping.o \
vdev_initialize.o \
vdev_label.o \
vdev_mirror.o \
vdev_missing.o \
vdev_queue.o \
vdev_raidz.o \
vdev_raidz_math.o \
vdev_raidz_math_scalar.o \
vdev_rebuild.o \
vdev_removal.o \
vdev_root.o \
vdev_trim.o \
zap.o \
zap_leaf.o \
zap_micro.o \
zcp.o \
zcp_get.o \
zcp_global.o \
zcp_iter.o \
zcp_set.o \
zcp_synctask.o \
zfeature.o \
zfs_byteswap.o \
zfs_chksum.o \
zfs_fm.o \
zfs_fuid.o \
zfs_impl.o \
zfs_ioctl.o \
zfs_log.o \
zfs_onexit.o \
zfs_quota.o \
zfs_ratelimit.o \
zfs_replay.o \
zfs_rlock.o \
zfs_sa.o \
zfs_vnops.o \
zil.o \
zio.o \
zio_checksum.o \
zio_compress.o \
zio_inject.o \
zle.o \
zrlock.o \
zthr.o \
zvol.o
ZFS_OBJS_OS := \
abd_os.o \
arc_os.o \
mmp_os.o \
policy.o \
qat.o \
qat_compress.o \
qat_crypt.o \
spa_misc_os.o \
trace.o \
vdev_disk.o \
vdev_file.o \
vdev_label_os.o \
zfs_acl.o \
zfs_ctldir.o \
zfs_debug.o \
zfs_dir.o \
zfs_file_os.o \
zfs_ioctl_os.o \
zfs_racct.o \
zfs_sysfs.o \
zfs_uio.o \
zfs_vfsops.o \
zfs_vnops_os.o \
zfs_znode.o \
zio_crypt.o \
zpl_ctldir.o \
zpl_export.o \
zpl_file.o \
zpl_file_range.o \
zpl_inode.o \
zpl_super.o \
zpl_xattr.o \
zvol_os.o
ZFS_OBJS_X86 := \
vdev_raidz_math_avx2.o \
vdev_raidz_math_avx512bw.o \
vdev_raidz_math_avx512f.o \
vdev_raidz_math_sse2.o \
vdev_raidz_math_ssse3.o
ZFS_OBJS_ARM64 := \
vdev_raidz_math_aarch64_neon.o \
vdev_raidz_math_aarch64_neonx2.o
ZFS_OBJS_PPC_PPC64 := \
vdev_raidz_math_powerpc_altivec.o
zfs-objs += $(addprefix zfs/,$(ZFS_OBJS)) $(addprefix os/linux/zfs/,$(ZFS_OBJS_OS))
zfs-$(CONFIG_X86) += $(addprefix zfs/,$(ZFS_OBJS_X86))
zfs-$(CONFIG_UML_X86)+= $(addprefix zfs/,$(ZFS_OBJS_X86))
zfs-$(CONFIG_ARM64) += $(addprefix zfs/,$(ZFS_OBJS_ARM64))
zfs-$(CONFIG_PPC) += $(addprefix zfs/,$(ZFS_OBJS_PPC_PPC64))
zfs-$(CONFIG_PPC64) += $(addprefix zfs/,$(ZFS_OBJS_PPC_PPC64))
# Suppress incorrect warnings from versions of objtool which are not
# aware of x86 EVEX prefix instructions used for AVX512.
OBJECT_FILES_NON_STANDARD_vdev_raidz_math_avx512bw.o := y
OBJECT_FILES_NON_STANDARD_vdev_raidz_math_avx512f.o := y
ifeq ($(CONFIG_ALTIVEC),y)
$(obj)/zfs/vdev_raidz_math_powerpc_altivec.o : c_flags += -maltivec
endif
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