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Subject[PATCH v3 5/9] Uprobe: Export uprobe_map_info along with uprobe_{build/free}_map_info()
Date
From: Ravi Bangoria <ravi.bangoria@linux.ibm.com>

Given the file(inode) and offset, build_map_info() finds all
existing mm that map the portion of file containing offset.

Exporting these functions and data structure will help to use
them in other set of files.

Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Reviewed-by: Jérôme Glisse <jglisse@redhat.com>
---
include/linux/uprobes.h | 9 +++++++++
kernel/events/uprobes.c | 14 +++-----------
2 files changed, 12 insertions(+), 11 deletions(-)

diff --git a/include/linux/uprobes.h b/include/linux/uprobes.h
index 0a294e9..7bd2760 100644
--- a/include/linux/uprobes.h
+++ b/include/linux/uprobes.h
@@ -109,12 +109,19 @@ enum rp_check {
RP_CHECK_RET,
};

+struct address_space;
struct xol_area;

struct uprobes_state {
struct xol_area *xol_area;
};

+struct uprobe_map_info {
+ struct uprobe_map_info *next;
+ struct mm_struct *mm;
+ unsigned long vaddr;
+};
+
extern int set_swbp(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long vaddr);
extern int set_orig_insn(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long vaddr);
extern bool is_swbp_insn(uprobe_opcode_t *insn);
@@ -149,6 +156,8 @@ struct uprobes_state {
extern bool arch_uprobe_ignore(struct arch_uprobe *aup, struct pt_regs *regs);
extern void arch_uprobe_copy_ixol(struct page *page, unsigned long vaddr,
void *src, unsigned long len);
+extern struct uprobe_map_info *uprobe_free_map_info(struct uprobe_map_info *info);
+extern struct uprobe_map_info *uprobe_build_map_info(struct address_space *mapping, loff_t offset, bool is_register);
#else /* !CONFIG_UPROBES */
struct uprobes_state {
};
diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index 477dc42..096d1e6 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -695,14 +695,7 @@ static void delete_uprobe(struct uprobe *uprobe)
put_uprobe(uprobe);
}

-struct uprobe_map_info {
- struct uprobe_map_info *next;
- struct mm_struct *mm;
- unsigned long vaddr;
-};
-
-static inline struct uprobe_map_info *
-uprobe_free_map_info(struct uprobe_map_info *info)
+struct uprobe_map_info *uprobe_free_map_info(struct uprobe_map_info *info)
{
struct uprobe_map_info *next = info->next;
mmput(info->mm);
@@ -710,9 +703,8 @@ struct uprobe_map_info {
return next;
}

-static struct uprobe_map_info *
-uprobe_build_map_info(struct address_space *mapping, loff_t offset,
- bool is_register)
+struct uprobe_map_info *uprobe_build_map_info(struct address_space *mapping,
+ loff_t offset, bool is_register)
{
unsigned long pgoff = offset >> PAGE_SHIFT;
struct vm_area_struct *vma;
--
1.8.3.1
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