/* * f2fs IO tracer * * Copyright (c) 2014 Motorola Mobility * Copyright (c) 2014 Jaegeuk Kim * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include #include #include #include "f2fs.h" #include "trace.h" RADIX_TREE(pids, GFP_NOIO); struct last_io_info last_io; static inline void __print_last_io(void) { if (!last_io.len) return; trace_printk("%3x:%3x %4x %-16s %2x %5x %12x %4x\n", last_io.major, last_io.minor, last_io.pid, "----------------", last_io.type, last_io.fio.rw, last_io.fio.blk_addr, last_io.len); memset(&last_io, 0, sizeof(last_io)); } static int __file_type(struct inode *inode, pid_t pid) { if (f2fs_is_atomic_file(inode)) return __ATOMIC_FILE; else if (f2fs_is_volatile_file(inode)) return __VOLATILE_FILE; else if (S_ISDIR(inode->i_mode)) return __DIR_FILE; else if (inode->i_ino == F2FS_NODE_INO(F2FS_I_SB(inode))) return __NODE_FILE; else if (inode->i_ino == F2FS_META_INO(F2FS_I_SB(inode))) return __META_FILE; else if (pid) return __NORMAL_FILE; else return __MISC_FILE; } void f2fs_trace_pid(struct page *page) { struct inode *inode = page->mapping->host; pid_t pid = task_pid_nr(current); void *p; page->private = pid; p = radix_tree_lookup(&pids, pid); if (p == current) return; if (p) radix_tree_delete(&pids, pid); f2fs_radix_tree_insert(&pids, pid, current); trace_printk("%3x:%3x %4x %-16s\n", MAJOR(inode->i_sb->s_dev), MINOR(inode->i_sb->s_dev), pid, current->comm); } void f2fs_trace_ios(struct page *page, struct f2fs_io_info *fio, int flush) { struct inode *inode; pid_t pid; int major, minor; if (flush) { __print_last_io(); return; } inode = page->mapping->host; pid = page_private(page); major = MAJOR(inode->i_sb->s_dev); minor = MINOR(inode->i_sb->s_dev); if (last_io.major == major && last_io.minor == minor && last_io.pid == pid && last_io.type == __file_type(inode, pid) && last_io.fio.rw == fio->rw && last_io.fio.blk_addr + last_io.len == fio->blk_addr) { last_io.len++; return; } __print_last_io(); last_io.major = major; last_io.minor = minor; last_io.pid = pid; last_io.type = __file_type(inode, pid); last_io.fio = *fio; last_io.len = 1; return; }