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Add the definitions of the get_cred_rcu, can_umount, and path_umount functions to the Makefile to enhance the readability and maintainability of the path unloading logic

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ShirkNeko
2025-04-11 03:55:23 +08:00
parent 610313d7d6
commit 549dc132a4
1 changed files with 7 additions and 1 deletions
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8
kernel/Makefile
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@@ -135,6 +135,7 @@ ATOMIC_INC_FUNC = atomic_long_inc_not_zero
endif
ifneq ($(shell grep -Eq "^static inline const struct cred \*get_cred_rcu" $(srctree)/include/linux/cred.h; echo $$?),0)
$(info -- KSU_SUSFS: adding function 'static inline const struct cred *get_cred_rcu();' to $(srctree)/include/linux/cred.h)
GET_CRED_RCU = static inline const struct cred *get_cred_rcu(const struct cred *cred)\n\
{\n\t\
struct cred *nonconst_cred = (struct cred *) cred;\n\t\
@@ -145,11 +146,14 @@ GET_CRED_RCU = static inline const struct cred *get_cred_rcu(const struct cred *
validate_creds(cred);\n\t\
return cred;\n\
}\n
$(shell grep -qF "$(GET_CRED_RCU)" $(srctree)/include/linux/cred.h || sed -i '/^static inline void put_cred/i $(GET_CRED_RCU)' $(srctree)/include/linux/cred.h)
GET_CRED_RCU_ESCAPED := $(subst \n,\\n,$(GET_CRED_RCU))
$(shell grep -qF -- "$(GET_CRED_RCU)" $(srctree)/include/linux/cred.h || \
sed -i '/^static inline void put_cred/a $(GET_CRED_RCU_ESCAPED)' $(srctree)/include/linux/cred.h)
$(shell sed -i "s/!$(ATOMIC_INC_FUNC)(&((struct cred \*)cred)->usage)/!get_cred_rcu(cred)/g" $(srctree)/kernel/cred.c)
endif
ifneq ($(shell grep -Eq "^static int can_umount" $(srctree)/fs/namespace.c; echo $$?),0)
$(info -- KSU_SUSFS: adding function 'static int can_umount(const struct path *path, int flags);' to $(srctree)/fs/namespace.c)
CAN_UMOUNT = static int can_umount(const struct path *path, int flags)\n\
{\n\t\
struct mount *mnt = real_mount(path->mnt);\n\t\
@@ -171,6 +175,7 @@ $(shell sed -i '/^static bool is_mnt_ns_file/i $(CAN_UMOUNT)' $(srctree)/fs/name
endif
ifneq ($(shell grep -Eq "^int path_umount" $(srctree)/fs/namespace.c; echo $$?),0)
$(info -- KSU_SUSFS: adding function 'int path_umount(struct path *path, int flags);' to $(srctree)/fs/namespace.c)
PATH_UMOUNT = int path_umount(struct path *path, int flags)\n\
{\n\t\
struct mount *mnt = real_mount(path->mnt);\n\t\
@@ -187,6 +192,7 @@ endif
ifneq ($(shell grep -Eq "^int path_umount" $(srctree)/fs/internal.h; echo $$?),0)
$(shell sed -i '/^extern void __init mnt_init/a int path_umount(struct path *path, int flags);' $(srctree)/fs/internal.h;)
$(info -- KSU_SUSFS: adding 'int path_umount(struct path *path, int flags);' to $(srctree)/fs/internal.h)
endif
# Do checks before compile