[Feature] add GA346 baseline version
Change-Id: Ic62933698569507dcf98240cdf5d9931ae34348f
diff --git a/src/kernel/linux/v4.19/fs/f2fs/trace.c b/src/kernel/linux/v4.19/fs/f2fs/trace.c
new file mode 100644
index 0000000..d0ab533
--- /dev/null
+++ b/src/kernel/linux/v4.19/fs/f2fs/trace.c
@@ -0,0 +1,165 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * f2fs IO tracer
+ *
+ * Copyright (c) 2014 Motorola Mobility
+ * Copyright (c) 2014 Jaegeuk Kim <jaegeuk@kernel.org>
+ */
+#include <linux/fs.h>
+#include <linux/f2fs_fs.h>
+#include <linux/sched.h>
+#include <linux/radix-tree.h>
+
+#include "f2fs.h"
+#include "trace.h"
+
+static RADIX_TREE(pids, GFP_ATOMIC);
+static spinlock_t pids_lock;
+static 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 %5x %12x %4x\n",
+ last_io.major, last_io.minor,
+ last_io.pid, "----------------",
+ last_io.type,
+ last_io.fio.op, last_io.fio.op_flags,
+ last_io.fio.new_blkaddr,
+ 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;
+
+ set_page_private(page, (unsigned long)pid);
+
+retry:
+ if (radix_tree_preload(GFP_NOFS))
+ return;
+
+ spin_lock(&pids_lock);
+ p = radix_tree_lookup(&pids, pid);
+ if (p == current)
+ goto out;
+ if (p)
+ radix_tree_delete(&pids, pid);
+
+ if (radix_tree_insert(&pids, pid, current)) {
+ spin_unlock(&pids_lock);
+ radix_tree_preload_end();
+ cond_resched();
+ goto retry;
+ }
+
+ trace_printk("%3x:%3x %4x %-16s\n",
+ MAJOR(inode->i_sb->s_dev), MINOR(inode->i_sb->s_dev),
+ pid, current->comm);
+out:
+ spin_unlock(&pids_lock);
+ radix_tree_preload_end();
+}
+
+void f2fs_trace_ios(struct f2fs_io_info *fio, int flush)
+{
+ struct inode *inode;
+ pid_t pid;
+ int major, minor;
+
+ if (flush) {
+ __print_last_io();
+ return;
+ }
+
+ inode = fio->page->mapping->host;
+ pid = page_private(fio->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.op == fio->op &&
+ last_io.fio.op_flags == fio->op_flags &&
+ last_io.fio.new_blkaddr + last_io.len ==
+ fio->new_blkaddr) {
+ 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;
+}
+
+void f2fs_build_trace_ios(void)
+{
+ spin_lock_init(&pids_lock);
+}
+
+#define PIDVEC_SIZE 128
+static unsigned int gang_lookup_pids(pid_t *results, unsigned long first_index,
+ unsigned int max_items)
+{
+ struct radix_tree_iter iter;
+ void **slot;
+ unsigned int ret = 0;
+
+ if (unlikely(!max_items))
+ return 0;
+
+ radix_tree_for_each_slot(slot, &pids, &iter, first_index) {
+ results[ret] = iter.index;
+ if (++ret == max_items)
+ break;
+ }
+ return ret;
+}
+
+void f2fs_destroy_trace_ios(void)
+{
+ pid_t pid[PIDVEC_SIZE];
+ pid_t next_pid = 0;
+ unsigned int found;
+
+ spin_lock(&pids_lock);
+ while ((found = gang_lookup_pids(pid, next_pid, PIDVEC_SIZE))) {
+ unsigned idx;
+
+ next_pid = pid[found - 1] + 1;
+ for (idx = 0; idx < found; idx++)
+ radix_tree_delete(&pids, pid[idx]);
+ }
+ spin_unlock(&pids_lock);
+}