|
|
| (한 사용자의 중간의 편집 3개 숨겨짐) |
| 3번째 줄: |
3번째 줄: |
| | (*) --> "read()" | | (*) --> "read()" |
| | "read()" --> "SYSCALL_DEFINE3()" | | "read()" --> "SYSCALL_DEFINE3()" |
| − | "SYSCALL_DEFINE3()" --> "vfs_read()"
| |
| | | | |
| | partition VFS { | | partition VFS { |
| − | "vfs_read()" --> "do_sync_read()" | + | "SYSCALL_DEFINE3()" --> "vfs_read()" |
| − | "do_sync_read()" -->"generic_file_aio_read"
| + | --> "do_sync_read()" |
| − | | + | |
| − | "generic_file_aio_read" -->"generic_segment_checks"
| + | |
| − | "generic_segment_checks" --> if "error" then
| + | |
| − | -->[error] (*)
| + | |
| − | endif
| + | |
| − | | + | |
| − | "generic_segment_checks" --> if "filp->f_flag check" then
| + | |
| − | --> [O_DIRECT]"filemap_write_and_wait_range"
| + | |
| − | else
| + | |
| − | -->"do_generic_file_read"
| + | |
| − | "filemap_write_and_wait_range" --> if "return O" then
| + | |
| − | --> "generic_file_direct_IO"
| + | |
| − | endif
| + | |
| − | | + | |
| − | "filemap_write_and_wait_range" -> "filemap_fdatawrite_range"
| + | |
| − | "filemap_fdatawrite_range" --> "do_writepages"
| + | |
| − | "do_writepages" --> "generic_writepage"
| + | |
| − | "generic_writepage" -->"write_cache_pages"
| + | |
| − | "write_cache_pages" --> "writepage"
| + | |
| − | | + | |
| − | "do_generic_file_read" --> "find_get_page(mapping, index)"
| + | |
| − | -->[no page] "page_cache_alloc_cold(mapping)"
| + | |
| − | "find_get_page(mapping, index)" --> "add_to_page_cache_lru"
| + | |
| − | "add_to_page_cache_lru" --> if "error check" then
| + | |
| − | -->[error]"page_cache_release(page)"
| + | |
| − | else
| + | |
| − | -->[error X]"ext4_readpage(struct file *file, struct page *page)"
| + | |
| − | "page_cache_release(page)"-->"file_accessed(filp)"
| + | |
| | } | | } |
| | | | |
| | | | |
| | partition EXT4 { | | partition EXT4 { |
| − | "generic_file_aio_read()"--> if "not O_DIRECT" then | + | "do_sync_read()" -->"generic_file_aio_read" |
| | + | |
| | + | --> if "not O_DIRECT" then |
| | -->"do_generic_file_read()" | | -->"do_generic_file_read()" |
| | "do_generic_file_read()"-->if "no page" then | | "do_generic_file_read()"-->if "no page" then |
