Linux kernel open system call 분석

Retired DISLab

(버전 사이의 차이)

2014년 4월 30일 (수) 19:03 현재 판

struct nameidata	include/linux/namei.h

SYSCALL_DEFINE3(open, const char __user *, filename, int, flags, umode_t, mode)	include/fs/open.c

do_sys_open(int dfd, const char __user *filename, int flags, umode_t mode) : long		fs/open.c

getname(const char __user * filename) : struct filename		fs/namei.c
프로세스 주소 공간에서 파일 경로명을 읽음

getname_flags(const char __user filename, int flags, int empty) : struct filename		fs/namei.c

get_unused_fd_flags(unsigned flags) : int		fs/file.c
프로세스의 비어있는 파일 디스크립터를 fd 지역변수에 저장

__alloc_fd(struct files_struct *files, unsigned start, unsigned end, unsigned flags) : int		fs/file.c

do_filp_open(int dfd, struct filename pathname, const struct open_flags op) : struct file		fs/namei.c

path_openat(int dfd, struct filename pathname, struct nameidata nd, const struct open_flags *op, int flags) : struct file		fs/namei.c

get_empty_filp(void) : struct file		fs/file_table.c

kmem_cache_zalloc(filp_cachep, GFP_KERNEL) : void		mm/slab.c

kmem_cache_alloc(struct kmem_cache *cachep, gfp_t flags) : void		include/linux/slab.h

do_tmpfile(int dfd, struct filename pathname, struct nameidata nd, int flags, const struct open_flags op, struct file file, int *opened) : int		fs/namei.c
path_init(int dfd, const char name, unsigned int flags, struct nameidata nd, struct file **fp) : int		fs/namei.c

link_path_walk(const char name, struct nameidata nd) : int		fs/namei.c

fd_install(const char __user * filename) : struct filename		fs/file.c

@@ 36번째 줄: / 36번째 줄: @@
 {{sp2}}{{sp2}}{{sp2}}[[do_tmpfile]](int dfd, struct filename *pathname, struct nameidata *nd, int flags, const struct open_flags *op, struct file *file, int *opened) : int ; ; [http://lxr.free-electrons.com/source/fs/namei.c#L3091  fs/namei.c]
-{{sp2}}{{sp2}}{{sp2}}[[path_init]](int dfd, const char *name, unsigned int flags, struct nameidata *nd, struct file **fp)
+{{sp2}}{{sp2}}{{sp2}}[[path_init]](int dfd, const char *name, unsigned int flags, struct nameidata *nd, struct file **fp) : int ; ; [http://lxr.free-electrons.com/source/fs/namei.c#L1808 fs/namei.c]
- : int ; ; [http://lxr.free-electrons.com/source/fs/namei.c#L1808 fs/namei.c]
 {{sp2}}{{sp2}}{{sp2}}[[link_path_walk]](const char *name, struct nameidata *nd) : int ; ; [http://lxr.free-electrons.com/source/fs/namei.c#L1728 fs/namei.c]