mirror of
https://github.com/versity/scoutfs.git
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800bced7d6
Yet another major shrinker API evolution in v6.6-rc4-53-gc42d50aefd17. The struct shrinker now has to be dynamically allocated. This is purposely a backwards incompatible break. Collapse the previous KC_ALLOC_SHRINKER, KC_INIT_SHRINKER_FUNCS, and KC_REGISTER_SHRINKER macros into a single KC_SETUP_SHRINKER macro. The three operations have to happen in different orders on different kernel APIs (the name is needed at alloc time on el10 and at register time on KC_SHRINKER_NAME kernels), so coupling them keeps the ordering correct per kernel. Add KC_SHRINKER_IS_NULL so callers can detect shrinker_alloc() failure on el10 and return -ENOMEM. The macro compiles to a constant 0 on older kernels where the shrinker is an embedded struct that cannot fail allocation. Signed-off-by: Auke Kok <auke.kok@versity.com>
558 lines
15 KiB
Makefile
558 lines
15 KiB
Makefile
#
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# We try to detect the specific api incompatibilities with simple tests
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# because distros regularly backport features without changing the
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# version.
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#
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ccflags-y += -include $(src)/kernelcompat.h
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#
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# v3.18-rc2-19-gb5ae6b15bd73
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#
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# Folds d_materialise_unique into d_splice_alias. Note reversal
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# of arguments (Also note Documentation/filesystems/porting.rst)
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#
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ifneq (,$(shell grep 'd_materialise_unique' include/linux/dcache.h))
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ccflags-y += -DKC_D_MATERIALISE_UNIQUE=1
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endif
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#
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# RHEL extended the fop struct so to use it we have to set
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# a flag to indicate that the struct is large enough and
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# contains the pointer.
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#
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ifneq (,$(shell grep 'FMODE_KABI_ITERATE' include/linux/fs.h))
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ccflags-y += -DKC_FMODE_KABI_ITERATE
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endif
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#
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# v4.7-rc2-23-g0d4d717f2583
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#
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# Added user_ns argument to posix_acl_valid
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#
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ifneq (,$(shell grep 'posix_acl_valid.*user_namespace' include/linux/posix_acl.h))
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ccflags-y += -DKC_POSIX_ACL_VALID_USER_NS
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endif
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#
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# v5.3-12296-g6d2052d188d9
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#
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# The RBCOMPUTE function is now passed an extra flag, and should return a bool
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# to indicate whether the propagated callback should stop or not.
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#
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ifneq (,$(shell grep 'static inline bool RBNAME.*_compute_max' include/linux/rbtree_augmented.h))
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ccflags-y += -DKC_RB_TREE_AUGMENTED_COMPUTE_MAX
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endif
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#
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# v3.13-25-g37bc15392a23
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#
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# Renames posix_acl_create to __posix_acl_create and provide some
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# new interfaces for creating ACLs
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#
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ifneq (,$(shell grep '__posix_acl_create' include/linux/posix_acl.h))
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ccflags-y += -DKC___POSIX_ACL_CREATE
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endif
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#
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# v4.8-rc1-29-g31051c85b5e2
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#
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# inode_change_ok() removed - replace with setattr_prepare()
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# v5.11-rc4-7-g2f221d6f7b88 removes extern attribute
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#
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ifneq (,$(shell grep 'int setattr_prepare' include/linux/fs.h))
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ccflags-y += -DKC_SETATTR_PREPARE
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endif
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#
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# v4.15-rc3-4-gae5e165d855d
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#
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# linux/iversion.h needs to manually be included for code that
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# manipulates this field.
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#
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ifneq (,$(shell grep -s 'define _LINUX_IVERSION_H' include/linux/iversion.h))
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ccflags-y += -DKC_NEED_LINUX_IVERSION_H=1
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endif
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# v4.11-12447-g104b4e5139fe
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#
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# Renamed __percpu_counter_add to percpu_counter_add_batch to clarify
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# that the __ wasn't less safe, just took an extra parameter.
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#
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ifneq (,$(shell grep 'percpu_counter_add_batch' include/linux/percpu_counter.h))
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ccflags-y += -DKC_PERCPU_COUNTER_ADD_BATCH
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endif
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#
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# v4.11-4550-g7dea19f9ee63
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#
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# Introduced memalloc_nofs_{save,restore} preferred instead of _noio_.
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#
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ifneq (,$(shell grep 'memalloc_nofs_save' include/linux/sched/mm.h))
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ccflags-y += -DKC_MEMALLOC_NOFS_SAVE
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endif
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#
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# v4.7-12414-g1eff9d322a44
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#
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# Renamed bi_rw to bi_opf to force old code to catch up. We use it as a
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# single switch between old and new bio structures.
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#
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ifneq (,$(shell grep 'bi_opf' include/linux/blk_types.h))
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ccflags-y += -DKC_BIO_BI_OPF
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endif
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#
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# v4.12-rc2-201-g4e4cbee93d56
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#
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# Moves to bi_status BLK_STS_ API instead of having a mix of error
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# end_io args or bi_error.
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#
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ifneq (,$(shell grep 'bi_status' include/linux/blk_types.h))
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ccflags-y += -DKC_BIO_BI_STATUS
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endif
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#
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# v3.11-8765-ga0b02131c5fc
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#
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# Remove the old ->shrink() API, ->{scan,count}_objects is preferred.
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#
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ifneq (,$(shell grep '(*shrink)' include/linux/shrinker.h))
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ccflags-y += -DKC_SHRINKER_SHRINK
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endif
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#
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# v3.19-4777-g6bec00352861
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#
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# backing_dev_info is removed from address_space. Instead we need to use
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# inode_to_bdi() inline from <backing-dev.h>.
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#
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ifneq (,$(shell grep 'struct backing_dev_info.*backing_dev_info' include/linux/fs.h))
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ccflags-y += -DKC_LINUX_BACKING_DEV_INFO=1
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endif
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#
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# v4.3-9290-ge409de992e3e
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#
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# xattr handlers are now passed a struct that contains `flags`
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#
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ifneq (,$(shell grep 'int...get..const struct xattr_handler.*struct dentry.*dentry,' include/linux/xattr.h))
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ccflags-y += -DKC_XATTR_STRUCT_XATTR_HANDLER=1
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endif
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#
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# v4.16-rc1-1-g9b2c45d479d0
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#
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# kernel_getsockname() and kernel_getpeername dropped addrlen arg
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#
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ifneq (,$(shell grep 'kernel_getsockname.*,$$' include/linux/net.h))
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ccflags-y += -DKC_KERNEL_GETSOCKNAME_ADDRLEN=1
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endif
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#
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# v4.1-rc1-410-geeb1bd5c40ed
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#
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# Adds a struct net parameter to sock_create_kern
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#
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ifneq (,$(shell grep 'sock_create_kern.*struct net' include/linux/net.h))
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ccflags-y += -DKC_SOCK_CREATE_KERN_NET=1
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endif
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#
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# v4.17-rc6-7-g95582b008388
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#
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# Kernel has current_time(inode) to uniformly retreive timespec in the right unit
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#
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ifneq (,$(shell grep 'struct timespec64 current_time' include/linux/fs.h))
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ccflags-y += -DKC_CURRENT_TIME_INODE=1
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endif
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#
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# v4.9-12228-g530e9b76ae8f
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#
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# register_cpu_notifier and family were all removed and to be
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# replaced with cpuhp_* API calls.
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#
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ifneq (,$(shell grep 'define register_hotcpu_notifier' include/linux/cpu.h))
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ccflags-y += -DKC_CPU_NOTIFIER
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endif
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#
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# v3.14-rc8-130-gccad2365668f
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#
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# generic_file_buffered_write is removed, backport it
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#
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ifneq (,$(shell grep 'extern ssize_t generic_file_buffered_write' include/linux/fs.h))
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ccflags-y += -DKC_GENERIC_FILE_BUFFERED_WRITE=1
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endif
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#
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# v5.7-438-g8151b4c8bee4
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#
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# struct address_space_operations switches away from .readpages to .readahead
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#
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# RHEL has backported this feature all the way to RHEL8, as part of RHEL_KABI,
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# which means we need to detect this very precisely
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#
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ifneq (,$(shell grep 'readahead.*struct readahead_control' include/linux/fs.h))
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ccflags-y += -DKC_FILE_AOPS_READAHEAD
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endif
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#
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# v4.0-rc7-1743-g8436318205b9
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#
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# .aio_read and .aio_write no longer exist. All reads and writes now use the
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# .read_iter and .write_iter methods, or must implement .read and .write (which
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# we don't).
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#
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ifneq (,$(shell grep 'ssize_t.*aio_read' include/linux/fs.h))
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ccflags-y += -DKC_LINUX_HAVE_FOP_AIO_READ=1
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endif
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#
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# rhel7 has a custom inode_operations_wrapper struct that is discarded
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# entirely in favor of upstream structure since rhel8.
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#
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ifneq (,$(shell grep 'void.*follow_link.*struct dentry' include/linux/fs.h))
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ccflags-y += -DKC_LINUX_HAVE_RHEL_IOPS_WRAPPER=1
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endif
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ifneq (,$(shell grep 'size_t.*ki_left;' include/linux/aio.h))
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ccflags-y += -DKC_LINUX_AIO_KI_LEFT=1
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endif
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#
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# v4.4-rc4-4-g98e9cb5711c6
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#
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# Introduces a new xattr_handler .name member that can be used to match the
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# entire field, instead of just a prefix. For these kernels, we must use
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# the new .name field instead.
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ifneq (,$(shell grep 'static inline const char .xattr_prefix' include/linux/xattr.h))
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ccflags-y += -DKC_XATTR_HANDLER_NAME=1
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endif
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#
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# v5.19-rc4-96-g342a72a33407
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#
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# Adds `typedef __u32 __bitwise blk_opf_t` to aid flag checking
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ifneq (,$(shell grep 'typedef __u32 __bitwise blk_opf_t' include/linux/blk_types.h))
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ccflags-y += -DKC_HAVE_BLK_OPF_T=1
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endif
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#
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# v5.12-rc6-9-g4f0f586bf0c8
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#
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# list_sort cmp function takes const list_head args
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ifneq (,$(shell grep 'const struct list_head ., const struct list_head .' include/linux/list_sort.h))
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ccflags-y += -DKC_LIST_CMP_CONST_ARG_LIST_HEAD
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endif
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# v5.7-523-g88dca4ca5a93
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#
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# The pgprot argument to vmalloc is always PAGE_KERNEL, so it is removed.
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ifneq (,$(shell grep 'extern void .__vmalloc.unsigned long size, gfp_t gfp_mask, pgprot_t prot' include/linux/vmalloc.h))
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ccflags-y += -DKC_VMALLOC_PGPROT_T
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endif
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# v6.2-rc1-18-g01beba7957a2
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#
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# fs: port inode_owner_or_capable() to mnt_idmap
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ifneq (,$(shell grep 'bool inode_owner_or_capable.struct user_namespace .mnt_userns' include/linux/fs.h))
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ccflags-y += -DKC_INODE_OWNER_OR_CAPABLE_USERNS
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endif
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#
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# v5.11-rc4-5-g47291baa8ddf
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#
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# namei: make permission helpers idmapped mount aware
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ifneq (,$(shell grep 'int inode_permission.struct user_namespace' include/linux/fs.h))
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ccflags-y += -DKC_INODE_PERMISSION_USERNS
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endif
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#
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# v5.11-rc4-24-g549c7297717c
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#
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# fs: make helpers idmap mount aware
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# Enlarges the VFS API methods to include user namespace argument.
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ifneq (,$(shell grep 'int ..mknod. .struct user_namespace' include/linux/fs.h))
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ccflags-y += -DKC_VFS_METHOD_USER_NAMESPACE_ARG
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endif
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#
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# v6.2-rc1-2-gabf08576afe3
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#
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# fs: vfs methods use struct mnt_idmap instead of struct user_namespace
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ifneq (,$(shell grep 'int vfs_mknod.struct mnt_idmap' include/linux/fs.h))
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ccflags-y += -DKC_VFS_METHOD_MNT_IDMAP_ARG
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endif
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#
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# v5.17-rc2-21-g07888c665b40
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#
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# Detect new style bio_alloc - pass bdev and opf.
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ifneq (,$(shell grep 'struct bio .bio_alloc.struct block_device .bdev' include/linux/bio.h))
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ccflags-y += -DKC_BIO_ALLOC_DEV_OPF_ARGS
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endif
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#
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# v5.7-rc4-53-gcddf8a2c4a82
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#
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# fiemap_prep() replaces fiemap_check_flags()
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ifneq (,$(shell grep -s 'int fiemap_prep.struct inode' include/linux/fiemap.h))
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ccflags-y += -DKC_FIEMAP_PREP
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endif
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#
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# v5.17-13043-g800ba29547e1
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#
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# generic_perform_write args use kiocb for passing filp and pos
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ifneq (,$(shell grep 'ssize_t generic_perform_write.struct kiocb ., struct iov_iter' include/linux/fs.h))
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ccflags-y += -DKC_GENERIC_PERFORM_WRITE_KIOCB_IOV_ITER
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endif
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#
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# v5.7-rc6-2496-g76ee0785f42a
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#
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# net: add sock_set_sndtimeo
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ifneq (,$(shell grep 'void sock_set_sndtimeo.struct sock' include/net/sock.h))
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ccflags-y += -DKC_SOCK_SET_SNDTIMEO
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endif
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#
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# v5.8-rc4-1931-gba423fdaa589
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#
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# setsockopt functions are now passed a sockptr_t value instead of char*
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ifneq (,$(shell grep -s 'include .linux/sockptr.h.' include/linux/net.h))
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ccflags-y += -DKC_SETSOCKOPT_SOCKPTR_T
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endif
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#
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# v5.7-rc6-2507-g71c48eb81c9e
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#
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# Adds a bunch of low level TCP sock parameter functions that we want to use.
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ifneq (,$(shell grep 'int tcp_sock_set_keepintvl' include/linux/tcp.h))
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ccflags-y += -DKC_HAVE_TCP_SET_SOCKFN
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endif
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#
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# v4.16-rc3-13-ga84d1169164b
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#
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# Fixes y2038 issues with struct timeval.
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ifneq (,$(shell grep -s '^struct __kernel_old_timeval .' include/uapi/linux/time_types.h))
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ccflags-y += -DKC_KERNEL_OLD_TIMEVAL_STRUCT
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endif
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#
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# v5.19-rc4-52-ge33c267ab70d
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#
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# register_shrinker now requires a name, used for debug stats etc.
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ifneq (,$(shell grep 'int __printf.*register_shrinker.struct shrinker .shrinker,' include/linux/shrinker.h))
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ccflags-y += -DKC_SHRINKER_NAME
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endif
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#
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# v5.18-rc5-246-gf132ab7d3ab0
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#
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# mpage_readpage() is now replaced with mpage_read_folio.
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ifneq (,$(shell grep 'int mpage_read_folio.struct folio .folio' include/linux/mpage.h))
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ccflags-y += -DKC_MPAGE_READ_FOLIO
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endif
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#
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# v5.18-rc5-219-gb3992d1e2ebc
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#
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# block_write_begin() no longer is being passed aop_flags
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ifneq (,$(shell grep -C1 'int block_write_begin' include/linux/buffer_head.h | tail -n 2 | grep 'unsigned flags'))
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ccflags-y += -DKC_BLOCK_WRITE_BEGIN_AOP_FLAGS
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endif
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#
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# v6.0-rc6-9-g863f144f12ad
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#
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# the .tmpfile() vfs method calling convention changed and now a struct
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# file* is passed to this metiond instead of a dentry. The function also
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# should open the created file and call finish_open_simple() before returning.
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ifneq (,$(shell grep 'extern void d_tmpfile.struct dentry' include/linux/dcache.h))
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ccflags-y += -DKC_D_TMPFILE_DENTRY
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endif
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#
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# v6.4-rc2-201-g0733ad800291
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#
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# New blk_mode_t replaces abuse of fmode_t
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ifneq (,$(shell grep 'typedef unsigned int __bitwise blk_mode_t' include/linux/blkdev.h))
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ccflags-y += -DKC_HAVE_BLK_MODE_T
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endif
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#
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# v6.4-rc2-186-g2736e8eeb0cc
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#
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# Reworks FMODE_EXCL kludge and instead modifies the blkdev_put() call to pass in
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# the (exclusive) holder to implement FMODE_EXCL handling.
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ifneq (,$(shell grep 'blkdev_put.struct block_device .bdev, void .holder' include/linux/blkdev.h))
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ccflags-y += -DKC_BLKDEV_PUT_HOLDER_ARG
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endif
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#
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# v6.4-rc4-163-g0d625446d0a4
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#
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# Entirely removes current->backing_dev_info to ultimately remove buffer_head
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# completely at some point.
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ifneq (,$(shell grep 'struct backing_dev_info.*backing_dev_info;' include/linux/sched.h))
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ccflags-y += -DKC_CURRENT_BACKING_DEV_INFO
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endif
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#
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# v6.8-rc1-4-gf3a608827d1f
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#
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# adds bdev_file_open_by_path() and later in v6.8-rc1-30-ge97d06a46526 removes bdev_open_by_path()
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# which requires us to use the file method from now on.
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ifneq (,$(shell grep 'struct file.*bdev_file_open_by_path.const char.*path' include/linux/blkdev.h))
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ccflags-y += -DKC_BDEV_FILE_OPEN_BY_PATH
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endif
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# v4.0-rc7-1796-gfe0f07d08ee3
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#
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# direct-io changes modify inode_dio_done to now be called inode_dio_end
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ifneq (,$(shell grep 'void inode_dio_end.struct inode' include/linux/fs.h))
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ccflags-y += -DKC_INODE_DIO_END
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endif
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#
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# v5.0-6476-g3d3539018d2c
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#
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# page fault handlers return a bitmask vm_fault_t instead
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# Note: el8's header has a slightly modified prefix here
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ifneq (,$(shell grep 'typedef.*__bitwise unsigned.*int vm_fault_t' include/linux/mm_types.h))
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ccflags-y += -DKC_MM_VM_FAULT_T
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endif
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# v3.19-499-gd83a08db5ba6
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#
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# .remap pages becomes obsolete
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ifneq (,$(shell grep 'int ..remap_pages..struct vm_area_struct' include/linux/mm.h))
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ccflags-y += -DKC_MM_REMAP_PAGES
|
|
endif
|
|
|
|
#
|
|
# v3.19-4742-g503c358cf192
|
|
#
|
|
# list_lru_shrink_count() and list_lru_shrink_walk() introduced
|
|
#
|
|
ifneq (,$(shell grep 'list_lru_shrink_count.*struct list_lru' include/linux/list_lru.h))
|
|
ccflags-y += -DKC_LIST_LRU_SHRINK_COUNT_WALK
|
|
endif
|
|
|
|
#
|
|
# v3.19-4757-g3f97b163207c
|
|
#
|
|
# lru_list_walk_cb lru arg added
|
|
#
|
|
ifneq (,$(shell grep 'struct list_head \*item, spinlock_t \*lock, void \*cb_arg' include/linux/list_lru.h))
|
|
ccflags-y += -DKC_LIST_LRU_WALK_CB_ITEM_LOCK
|
|
endif
|
|
|
|
#
|
|
# v6.7-rc4-153-g0a97c01cd20b
|
|
#
|
|
# list_lru_{add,del} -> list_lru_{add,del}_obj
|
|
#
|
|
ifneq (,$(shell grep '^bool list_lru_add_obj' include/linux/list_lru.h))
|
|
ccflags-y += -DKC_LIST_LRU_ADD_OBJ
|
|
endif
|
|
|
|
#
|
|
# v6.12-rc6-227-gda0c02516c50
|
|
#
|
|
# lru_list_walk_cb lock arg removed
|
|
#
|
|
ifneq (,$(shell grep 'struct list_lru_one \*list, spinlock_t \*lock, void \*cb_arg' include/linux/list_lru.h))
|
|
ccflags-y += -DKC_LIST_LRU_WALK_CB_LIST_LOCK
|
|
endif
|
|
|
|
#
|
|
# v5.1-rc4-273-ge9b98e162aa5
|
|
#
|
|
# introduce stack trace helpers
|
|
#
|
|
ifneq (,$(shell grep '^unsigned int stack_trace_save' include/linux/stacktrace.h))
|
|
ccflags-y += -DKC_STACK_TRACE_SAVE
|
|
endif
|
|
|
|
#
|
|
# v6.1-rc1-2-g138060ba92b3
|
|
#
|
|
# set_acl now passed a struct dentry instead of inode.
|
|
#
|
|
ifneq (,$(shell grep 'int ..set_acl.*struct dentry' include/linux/fs.h))
|
|
ccflags-y += -DKC_SET_ACL_DENTRY
|
|
endif
|
|
|
|
#
|
|
# v6.1-rc1-3-gcac2f8b8d8b5
|
|
#
|
|
# get_acl renamed to get_inode_acl.
|
|
#
|
|
ifneq (,$(shell grep 'struct posix_acl.*get_inode_acl' include/linux/fs.h))
|
|
ccflags-y += -DKC_GET_INODE_ACL
|
|
endif
|
|
|
|
#
|
|
# v6.1-rc5-2-ge9a688bcb193
|
|
#
|
|
# get_random_u32_below() implementation
|
|
ifneq (,$(shell grep 'u32 get_random_u32_below' include/linux/random.h))
|
|
ccflags-y += -DKC_HAVE_GET_RANDOM_U32_BELOW
|
|
endif
|
|
|
|
# v6.5-rc1-7-g9b6304c1d537
|
|
#
|
|
# ctime accessor methods
|
|
ifneq (,$(shell grep 'timespec64 inode_set_ctime_current' include/linux/fs.h))
|
|
ccflags-y += -DKC_FS_INODE_C_TIME_ACCESSOR
|
|
endif
|
|
|
|
#
|
|
# v6.6-rc5-1-g077c212f0344
|
|
#
|
|
# Must use access methods from fs.h to get to inode ctime/mtime/atime
|
|
ifneq (,$(shell grep 'inline time64_t inode_get_atime_sec' include/linux/fs.h))
|
|
ccflags-y += -DKC_FS_INODE_AM_TIME_ACCESSOR
|
|
endif
|
|
|
|
#
|
|
# v6.12-rc1-3-g5f60d5f6bbc1
|
|
#
|
|
# asm/unaligned.h replaced with linux/unaligned.h
|
|
ifneq (,$(shell grep -s 'define __LINUX_UNALIGNED_H' include/linux/unaligned.h))
|
|
ccflags-y += -DKC_HAVE__LINUX_UNALIGNED_H
|
|
endif
|
|
|
|
#
|
|
# v6.9-rc4-29-g203c1ce0bb06
|
|
#
|
|
# RIP bd_inode. (note, struct moved between headers!)
|
|
ifneq (,$(shell grep -s 'struct inode.*bd_inode' include/linux/blk_types.h include/linux/fs.h))
|
|
ccflags-y += -DKC_HAVE_BD_INODE
|
|
endif
|
|
|
|
#
|
|
# v6.8-9146-gc759e609030c
|
|
#
|
|
# Removes __assign_str_len() and removes the 2nd param of __assign_str().
|
|
ifneq (,$(shell grep -s 'define __assign_str.dst, src' \
|
|
include/trace/trace_events.h \
|
|
include/trace/ftrace.h \
|
|
include/trace/stages/stage6_event_callback.h))
|
|
ccflags-y += -DKC_HAVE_ASSIGN_STR_PARMS
|
|
endif
|
|
|
|
#
|
|
# v6.6-rc4-53-gc42d50aefd17
|
|
#
|
|
# el10 yet again modifies the shrinker API significantly, breaking our current
|
|
# implementation.
|
|
ifneq (,$(shell grep 'struct shrinker .shrinker_alloc' include/linux/shrinker.h))
|
|
ccflags-y += -DKC_SHRINKER_ALLOC
|
|
endif
|