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vdfs_trace.c
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/*
* vdfs_trace.c
*
* Copyright (C) 2017 Samsung Electronics
* Created by Huijin Park([email protected])
*
* 2017-05-22 : Implement tracer for vfs file_operations.
* NOTE:
*/
#include <linux/sched.h>
#include <linux/mount.h>
#include <linux/list.h>
#include <linux/list_sort.h>
#include <linux/fs.h>
#include <linux/genhd.h>
#include <linux/uio.h>
#include <linux/blk_types.h>
#include <linux/proc_fs.h>
#include <linux/bio.h>
#include <linux/ctype.h>
#include "vdfs4.h"
#include <linux/vdfs_trace.h> /* FlashFS : vdfs-trace */
/* #define IO_BANDWITH */
/* output option */
#define OUTPUT_NAME_LEN (VT_NAME_LEN-1) /* last byte is Null */
#define OUTPUT_OPS_TYPE (5)
#define OUTPUT_OPS_FUNC (11)
/* Trace Option */
#if defined(CONFIG_VDFS4_DEBUG)
# define TRACE_LIMIT 10000 /* max trace data count */
#elif defined(CONFIG_VDFS4_PERF)
# define TRACE_LIMIT 10000 /* max trace data count */
#else
# error "Release Kernel should exclude vdfs_trace..!!"
#endif
/* Trace Control Options */
#define TRACE_OFF (0) /* trace enable */
#define TRACE_ON (1) /* trace disable */
#define SUPPRESS_OFF (0) /* trace suppress off */
#define SUPPRESS_ON (1) /* trace suppress on */
struct vdfs_trace_ctrl {
unsigned char onoff;
unsigned char suppress;
};
static struct vdfs_trace_ctrl trace_ctrl = {
#if defined(CONFIG_VDFS4_DEBUG)
.onoff = TRACE_ON,
.suppress = SUPPRESS_ON,
#elif defined(CONFIG_VDFS4_PERF)
.onoff = TRACE_OFF,
.suppress = SUPPRESS_ON,
#else
#error "Release Kernel should exclude vdfs_trace..!!"
#endif
};
/* For list control about 'vdfs_trace_data_t' */
#define VT_ENTRY(p, name) \
list_entry((p), vdfs_trace_data_t, name)
#define VT_FIRST_ENTRY(p, name) \
list_first_entry((p), vdfs_trace_data_t, name)
#define VT_LAST_ENTRY(p, name) \
list_last_entry((p), vdfs_trace_data_t, name)
/* For trace data flag control */
#define VT_IS_FLAG(x, y) ((x) & ((0x1)<<(y)))
#define VT_SET_FLAG(x, y) { (x) |= ((0x1)<<(y)); }
#define VT_CLEAR_FLAG(x, y) { (x) &= (~((0x1)<<(y))); }
enum vt_trace_flags_type {
/* 00 */ vt_flag_sublist, /* 0:resp item, 1:sublist item */
/* 01 */ vt_flag_sublist_last, /* 1: the last data of sublist */
/* 02 */ vt_flag_canceled, /* 1: canceled record */
};
/* Static Variables */
static vdfs_trace_data_t _trace_data[TRACE_LIMIT];
static unsigned int traced_data_cnt;
static LIST_HEAD(_free_list);
static LIST_HEAD(_traced_list);
static LIST_HEAD(_tracing_start_list);
static LIST_HEAD(_tracing_finish_list);
static DEFINE_SPINLOCK(vdfs_trace_lock);
static DEFINE_SPINLOCK(tracing_lock);
static DECLARE_WAIT_QUEUE_HEAD(vdfs_trace_wait);
static vdfs_trace_data_t *alloc_trace_data(void);
static int arrange_traced_data(vdfs_trace_data_t *data);
static void start_trace_data(vdfs_trace_data_t *data);
static void finish_trace_data(vdfs_trace_data_t *data);
static int __init set_init_mode(char *s)
{
if (!s)
return 0;
trace_ctrl.onoff = TRACE_ON;
pr_info("enable vdfs trace(%s)\n", s);
return 0;
}
early_param("flash_trace", set_init_mode);
static vdfs_trace_data_t *alloc_trace_data(void)
{
unsigned long flag;
static unsigned int used_cnt;
vdfs_trace_data_t *rtn = NULL;
if (trace_ctrl.onoff == TRACE_OFF)
return NULL;
spin_lock_irqsave(&vdfs_trace_lock, flag);
if (used_cnt < TRACE_LIMIT) {
/* alloc from _trace_data. */
rtn = &(_trace_data[used_cnt++]);
} else {
/*
if free buffer is empty, move buffer from traced
to free buffer
*/
if (list_empty(&_free_list) && !list_empty(&_traced_list)) {
vdfs_trace_data_t *trace;
trace = VT_FIRST_ENTRY(&_traced_list, list);
do {
list_move(&trace->list, &_free_list);
if (list_empty(&_traced_list))
break;
trace = VT_FIRST_ENTRY(&_traced_list, list);
} while (VT_IS_FLAG(trace->flags, vt_flag_sublist));
}
/* alloc from _free_list */
if (!list_empty(&_free_list)) {
rtn = list_first_entry_or_null(&_free_list,
vdfs_trace_data_t, list);
if (rtn)
list_del(&rtn->list); /* delete from free list */
} else
rtn = NULL;
}
spin_unlock_irqrestore(&vdfs_trace_lock, flag);
if (rtn)
memset(rtn, 0x0, sizeof(vdfs_trace_data_t));
return rtn;
}
static void free_trace_data(vdfs_trace_data_t *trace)
{
unsigned long flag;
/* push into free list */
spin_lock_irqsave(&vdfs_trace_lock, flag);
list_add_tail(&trace->list, &_free_list);
spin_unlock_irqrestore(&vdfs_trace_lock, flag);
}
static void start_trace_data(vdfs_trace_data_t *trace)
{
unsigned long flag;
trace->pid = task_pid_nr(current);
trace->ppid = task_ppid_nr(current);
memcpy(trace->process, current->comm, sizeof(trace->process)-1);
spin_lock_irqsave(&tracing_lock, flag);
if (current->vt_rep_idx == 0) {
trace->idx = traced_data_cnt;
/*
If mmc request is resp data,
do not save idx into task struct.
*/
if (trace->data_type != vdfs_trace_data_req &&
trace->ops_type != vdfs_trace_decomp_hw) {
current->vt_rep_idx = traced_data_cnt;
}
traced_data_cnt++;
} else {
VT_SET_FLAG(trace->flags, vt_flag_sublist);
trace->idx = current->vt_rep_idx;
}
list_add_tail(&trace->list, &_tracing_start_list);
spin_unlock_irqrestore(&tracing_lock, flag);
trace->start.tv64 = sched_clock();
}
static void finish_trace_data(vdfs_trace_data_t *trace)
{
unsigned long flag;
struct list_head *p;
int is_tracing = 0;
if (!trace)
return;
trace->end.tv64 = sched_clock();
if (!VT_IS_FLAG(trace->flags, vt_flag_sublist))
current->vt_rep_idx = 0; /* reset index for resp trace data */
spin_lock_irqsave(&tracing_lock, flag);
list_del(&trace->list);
list_add_tail(&trace->list, &_tracing_finish_list);
/* check finish io or not */
list_for_each(p, &_tracing_start_list) {
vdfs_trace_data_t *entry = VT_ENTRY(p, list);
if (trace->pid == entry->pid && trace->idx == entry->idx) {
is_tracing = 1;
break;
}
}
spin_unlock_irqrestore(&tracing_lock, flag);
if (!is_tracing)
arrange_traced_data(trace);
}
static int traced_data_cmp(void *priv, struct list_head *a,
struct list_head *b)
{
if (a != NULL && b != NULL) {
vdfs_trace_data_t *_a, *_b;
_a = VT_ENTRY(a, list);
_b = VT_ENTRY(b, list);
if (_a->start.tv64 < _b->start.tv64)
return 0;
else
return 1;
}
return 1;
}
static inline int is_mmc_trace_data(vdfs_trace_data_t *entry)
{
if (entry->ops_type == vdfs_trace_decomp_hw
|| entry->data_type == vdfs_trace_data_req
|| entry->data_type == vdfs_trace_data_rpmb)
return 1;
else
return 0;
}
static inline int is_write_trace_data(vdfs_trace_data_t *entry)
{
if (entry->ops_type == vdfs_trace_fops_write_iter
|| entry->ops_type == vdfs_trace_aops_writepage
|| entry->ops_type == vdfs_trace_aops_writepages)
return 1;
else
return 0;
}
static int arrange_traced_data(vdfs_trace_data_t *data)
{
unsigned char is_tracing = 0;
unsigned long flag;
vdfs_trace_data_t *last_entry;
LIST_HEAD(buffer);
struct list_head *pos, *n;
/* extract tracing data from tracing_finish_list */
spin_lock_irqsave(&tracing_lock, flag);
list_for_each_safe(pos, n, &_tracing_finish_list) {
vdfs_trace_data_t *entry = VT_ENTRY(pos, list);
if (entry->pid == data->pid && entry->idx == data->idx) {
list_del(&entry->list);
list_add(&entry->list, &buffer);
if (trace_ctrl.suppress == SUPPRESS_OFF
|| entry->data_type == vdfs_trace_data_pivot
|| is_mmc_trace_data(entry)
|| is_write_trace_data(entry))
is_tracing = 1;
}
}
spin_unlock_irqrestore(&tracing_lock, flag);
/* sort extracted tracing data (order by start time) */
list_sort(NULL, &buffer, traced_data_cmp);
last_entry = VT_LAST_ENTRY(&buffer, list);
if (VT_IS_FLAG(last_entry->flags, vt_flag_sublist))
VT_SET_FLAG(last_entry->flags, vt_flag_sublist_last);
/* push tracing data into traced list */
spin_lock_irqsave(&vdfs_trace_lock, flag);
if (!is_tracing)
list_splice_tail(&buffer, &_free_list);
else
list_splice_tail(&buffer, &_traced_list);
spin_unlock_irqrestore(&vdfs_trace_lock, flag);
wake_up_interruptible(&vdfs_trace_wait);
return 0;
}
/*
* Common Function
*/
inline vdfs_trace_data_t *vdfs_trace_start(void)
{
vdfs_trace_data_t *trace = alloc_trace_data();
if (trace)
start_trace_data(trace);
return trace;
}
inline void vdfs_trace_finish(vdfs_trace_data_t *trace)
{
if (trace)
finish_trace_data(trace);
}
static inline void fill_trace_data(vdfs_trace_data_t *trace,
enum vdfs_trace_data_type data_type,
enum vdfs_trace_ops_type ops_type,
int partno,
unsigned long i_ino,
char *filename,
loff_t offset,
loff_t count,
unsigned long long type)
{
struct vdfs_trace_sub_data *target = &(trace->data.target);
trace->data_type = data_type;
trace->ops_type = ops_type;
target->partno = partno;
target->i_ino = i_ino;
if (filename)
memcpy(target->filename, filename, sizeof(target->filename) - 1);
target->offset = offset;
target->count = count;
target->type = type;
}
static void fill_fops_trace_data(vdfs_trace_data_t *trace,
enum vdfs_trace_ops_type ops_type,
struct hd_struct *bd_part,
struct inode *inode, struct file *file,
loff_t pos, size_t count)
{
unsigned int flags = 0;
if (file)
flags = file->f_flags;
if (inode && virt_addr_valid(VDFS4_I(inode)->name))
fill_trace_data(trace, vdfs_trace_data_fops, ops_type,
bd_part->partno, inode->i_ino,
VDFS4_I(inode)->name, pos, count, flags);
else if (inode && file && file->f_path.dentry)
fill_trace_data(trace, vdfs_trace_data_fops, ops_type,
bd_part->partno, inode->i_ino,
file->f_path.dentry->d_iname, pos, count, flags);
else
fill_trace_data(trace, vdfs_trace_data_fops, ops_type,
bd_part->partno, 0,
'\0', pos, count, flags);
}
/**
* vdfs_trace_fops_start - start file operations trace
* @ops_type: file operation type
* @bd_part : target partition(for partition number)
* @inode : file information(for filename)
* @file : sub file information(for filename)
* @pos : operation position
* @count : operation length
*
*/
vdfs_trace_data_t *vdfs_trace_fops_start(
enum vdfs_trace_ops_type ops_type,
struct hd_struct *bd_part,
struct inode *inode, struct file *file,
loff_t pos, size_t count)
{
vdfs_trace_data_t *trace = alloc_trace_data();
if (!trace)
return NULL;
fill_fops_trace_data(trace, ops_type, bd_part, inode, file, pos, count);
start_trace_data(trace);
return trace;
}
/**
* vdfs_trace_fops_finish - finish file operations trace
* @trace : trace data
* @ops_type: file operation type
* @bd_part : target partition(for partition number)
* @inode : file information(for filename)
* @file : sub file information(for filename)
* @pos : operation position
* @count : operation length
*
*/
void vdfs_trace_fops_finish(vdfs_trace_data_t *trace,
enum vdfs_trace_ops_type ops_type,
struct hd_struct *bd_part,
struct inode *inode, struct file *file,
loff_t pos, size_t count)
{
if (!trace)
return;
fill_fops_trace_data(trace, ops_type, bd_part, inode, file, pos, count);
finish_trace_data(trace);
}
/*
* mmc request
*/
#define REQ_MAGIC (0x76647472)/* vdtr */
static inline int _is_mmc_dev(struct block_device *bi_bdev)
{
const char *mmc_dev_name = "mmcblk";
return !(memcmp(mmc_dev_name,
bi_bdev->bd_disk->disk_name, 6));
}
enum vdfs_trace_ops_type _get_mmc_req_ops_type(u64 cmd_flags)
{
/* refer 'enum rq_flag_bits' */
if (cmd_flags & REQ_DISCARD)
return vdfs_trace_req_discard;
else if ((cmd_flags & (REQ_WRITE|REQ_META)) == (REQ_WRITE|REQ_META))
return vdfs_trace_req_write_meta;
else if (cmd_flags & REQ_WRITE)
return vdfs_trace_req_write;
else if (cmd_flags & REQ_FLUSH)
return vdfs_trace_req_flush;
else if (cmd_flags & REQ_META)
return vdfs_trace_req_read_meta;
else if (!(cmd_flags & REQ_WRITE))
return vdfs_trace_req_read;
else
return vdfs_trace_req_etc;
}
/**
* vdfs_trace_insert_rq - start mmc request trace
* @req: request of mmc
*
*/
void vdfs_trace_insert_req(struct request *req)
{
vdfs_trace_data_t *trace;
req->vdfs_trace_magic = 0x0;
req->vdfs_trace_data = NULL;
if (!req->rq_disk || !req->part)
return;
if (memcmp(req->rq_disk->disk_name, "mmc", 3))
return;
trace = alloc_trace_data();
if (trace) {
fill_trace_data(trace, vdfs_trace_data_req,
_get_mmc_req_ops_type(req->cmd_flags),
req->part->partno, 0, "",
req->__sector, 0, req->cmd_flags);
start_trace_data(trace);
req->vdfs_trace_magic = REQ_MAGIC;
req->vdfs_trace_data = trace;
}
}
/**
* vdfs_trace_update_req - update req start time
* @req : request of mmc
*/
void vdfs_trace_update_req(struct request *req)
{
vdfs_trace_data_t *trace;
if (!req)
return;
if (!req->vdfs_trace_data)
return;
if (req->vdfs_trace_magic != REQ_MAGIC)
return;
trace = (vdfs_trace_data_t *)req->vdfs_trace_data;
trace->start.tv64 = sched_clock();
}
/**
* vdfs_trace_complete_req - finish mmc request trace
* @req: request of mmc
* @nr_bytes written size(bytes_xfered)
*/
void vdfs_trace_complete_req(struct request *req, unsigned int nr_bytes)
{
vdfs_trace_data_t *trace;
trace = (vdfs_trace_data_t *)req->vdfs_trace_data;
if (!trace)
return;
if (req->vdfs_trace_magic != REQ_MAGIC)
return;
trace->data.req.size = nr_bytes;
finish_trace_data(trace);
/* clear */
req->vdfs_trace_magic = 0x0;
req->vdfs_trace_data = NULL;
}
/**
* vdfs_trace_fault_start - start fault trace
* @vma: vm area(for file information)
* @offset: fault address
* @pages: read ahead size from page fault
* @type: if 0, async read-ahead
* if 1, sync read-ahead
* if 2, non read-ahead operation.
*
*/
vdfs_trace_data_t *vdfs_trace_fault_start(struct vm_area_struct *vma,
unsigned long offset, unsigned int pages, unsigned int type)
{
vdfs_trace_data_t *trace;
struct block_device *s_bdev;
struct dentry *dentry;
struct inode *inode;
if (!vma->vm_file
|| !vma->vm_file->f_path.mnt->mnt_sb
|| !vma->vm_file->f_path.mnt->mnt_sb->s_bdev)
return NULL;
s_bdev = vma->vm_file->f_path.mnt->mnt_sb->s_bdev;
dentry = vma->vm_file->f_path.dentry;
if (!_is_mmc_dev(s_bdev))
return NULL;
trace = alloc_trace_data();
if (trace) {
struct inode *inode = dentry->d_inode;
if (inode && is_vdfs4(inode->i_sb) && VDFS4_I(inode)->name)
fill_trace_data(trace, vdfs_trace_data_fault,
vdfs_trace_fault,
s_bdev->bd_part->partno,
inode->i_ino, VDFS4_I(inode)->name,
offset, pages, type);
else
fill_trace_data(trace, vdfs_trace_data_fault,
vdfs_trace_fault,
s_bdev->bd_part->partno, 0, dentry->d_iname,
offset, pages, type);
start_trace_data(trace);
}
return trace;
}
/**
* vdfs_trace_decomp_finish - finish hw decompress trace
* @type: type of decompress requirement(hw or sw)
* @inode: inode pointer
* @offset: offset in file data
* @chunk_len: read size
* @use_hash: if 1, it calculated hash and compared with hash table.
* @is_cancled: if 1, cancel trace data.
* @is_uncompr: if 1, the chunk is not compressed data
*/
void vdfs_trace_decomp_finish(vdfs_trace_data_t *trace,
enum vdfs_trace_ops_type type,
struct inode *inode,
size_t offset, size_t chunk_len,
unsigned char use_hash,
int is_cancled, int is_uncompr)
{
if (!trace)
return;
if (is_cancled||is_uncompr) {
VT_SET_FLAG(trace->flags, vt_flag_canceled);
} else {
if (VDFS4_I(inode)->name)
fill_trace_data(trace, vdfs_trace_data_decomp,
type,
inode->i_sb->s_bdev->bd_part->partno,
inode->i_ino, VDFS4_I(inode)->name,
offset, chunk_len, use_hash);
else
fill_trace_data(trace, vdfs_trace_data_decomp,
type,
inode->i_sb->s_bdev->bd_part->partno,
0, "",
offset, chunk_len, use_hash);
}
finish_trace_data(trace);
}
/**
* vdfs_trace_iops_start - start inode operation trace
* @ops_type: operation type
* @dentry: dentry for partition number and filename
*
*/
vdfs_trace_data_t *vdfs_trace_iops_start(enum vdfs_trace_ops_type ops_type,
struct dentry *dentry)
{
vdfs_trace_data_t *trace = alloc_trace_data();
if (trace) {
if (dentry && dentry->d_inode) {
struct inode *inode = dentry->d_inode;
fill_trace_data(trace, vdfs_trace_data_iops, ops_type,
dentry->d_sb->s_bdev->bd_part->partno,
inode->i_ino, VDFS4_I(inode)->name,
0, 0, 0);
} else if (dentry)
fill_trace_data(trace, vdfs_trace_data_iops, ops_type,
dentry->d_sb->s_bdev->bd_part->partno,
0, dentry->d_iname,
0, 0, 0);
else
fill_trace_data(trace, vdfs_trace_data_iops, ops_type,
0, 0, "", 0, 0, 0);
start_trace_data(trace);
}
return trace;
}
/**
* vdfs_trace_aops_start - start address operation trace
* @ops_type: operation type
* @inode: inode for partition number
* @file: file for filename
* @pos: operation position
* @len: operation length
*
*/
vdfs_trace_data_t *vdfs_trace_aops_start(
enum vdfs_trace_ops_type ops_type,
struct inode *inode, struct file *file,
loff_t pos, loff_t len, unsigned int is_sync)
{
loff_t data_pos, data_len;
struct vdfs4_inode_info *i_info = VDFS4_I(inode);
vdfs_trace_data_t *trace = alloc_trace_data();
if (trace) {
switch(ops_type) {
case vdfs_trace_aops_writepages:
case vdfs_trace_aops_writepage:
data_pos = 0;
data_len = i_info->write_size;
i_info->write_size = 0; /* reset */
if (data_len == 0) {
/* ignore nomeaning trace data */
free_trace_data(trace);
return NULL;
}
break;
case vdfs_trace_aops_write_begin: /* FALLTHROUGH */
i_info->write_size += len; /* accrue write size */
default:
data_pos = pos;
data_len = len;
break;
}
if (inode && VDFS4_I(inode)->name)
fill_trace_data(trace, vdfs_trace_data_aops,
ops_type,
inode->i_sb->s_bdev->bd_part->partno,
inode->i_ino, VDFS4_I(inode)->name,
data_pos, data_len, is_sync);
else
fill_trace_data(trace, vdfs_trace_data_aops,
ops_type,
0, 0, "",
data_pos, data_len, is_sync);
start_trace_data(trace);
}
return trace;
}
/**
* vdfs_trace_writeback_start - start writeback trace
*
*/
vdfs_trace_data_t *vdfs_trace_writeback_start(void)
{
vdfs_trace_data_t *trace;
trace = alloc_trace_data();
if (trace) {
trace->data_type = vdfs_trace_data_writeback;
trace->ops_type = vdfs_trace_wb_writeback;
start_trace_data(trace);
}
return trace;
}
vdfs_trace_data_t *vdfs_trace_fstype_start(enum vdfs_trace_ops_type ops,
char *device_name)
{
vdfs_trace_data_t *trace = alloc_trace_data();
if (trace) {
fill_trace_data(trace, vdfs_trace_data_fstype,
ops, 0, 0, device_name, 0, 0, 0);
start_trace_data(trace);
}
return trace;
}
vdfs_trace_data_t *vdfs_trace_sb_start(enum vdfs_trace_ops_type ops,
struct super_block *sb, struct inode *inode,
loff_t pos, loff_t len)
{
vdfs_trace_data_t *trace = alloc_trace_data();
if (trace) {
if (inode && VDFS4_I(inode)->name)
fill_trace_data(trace, vdfs_trace_data_sb,
ops, sb->s_bdev->bd_part->partno,
inode->i_ino, VDFS4_I(inode)->name,
pos, len, 0);
else
fill_trace_data(trace, vdfs_trace_data_sb,
ops, sb->s_bdev->bd_part->partno,
0, "",
pos, len, 0);
start_trace_data(trace);
}
return trace;
}
vdfs_trace_data_t *vdfs_trace_rpmb_start(unsigned int blocks,
unsigned char *buf)
{
static short read_address;
static unsigned char reading;
unsigned short *req = (uint16_t *)(buf + 510);
vdfs_trace_data_t *trace = NULL;
if (reading) {
trace = alloc_trace_data();
if (trace == NULL)
return NULL;
fill_trace_data(trace, vdfs_trace_data_rpmb,
vdfs_trace_rpmb_read, 0, 0, "",
read_address, blocks, 0);
reading = 0;
start_trace_data(trace);
} else if (buf && be16_to_cpu(*req) == 0x3) { /* MMC_RPMB_WRITE_DATA */
trace = alloc_trace_data();
if (trace == NULL)
return NULL;
fill_trace_data(trace, vdfs_trace_data_rpmb,
vdfs_trace_rpmb_write, 0, 0, "",
be16_to_cpu(*((uint16_t *)(buf+504))), blocks, 0);
start_trace_data(trace);
} else if (buf && be16_to_cpu(*req) == 0x4) { /* MMC_RPMB_READ_DATA */
read_address = be16_to_cpu(*((uint16_t *)(buf+504)));
reading = 1;
}
return trace;
}
void vdfs_trace_insert_pivot(enum vdfs_trace_ops_type pivot)
{
vdfs_trace_data_t *trace = alloc_trace_data();
if (trace) {
trace->data_type = vdfs_trace_data_pivot;
trace->ops_type = pivot;
start_trace_data(trace);
finish_trace_data(trace);
}
}
static const char *_data_type_to_str(enum vdfs_trace_data_type data_type)
{
switch (data_type) {
case vdfs_trace_data_fops:
return "f_ops";
case vdfs_trace_data_req:
return "req";
case vdfs_trace_data_fault:
return "fault";
case vdfs_trace_data_decomp:
return "decmp";
case vdfs_trace_data_iops:
return "i_ops";
case vdfs_trace_data_aops:
return "a_ops";
case vdfs_trace_data_writeback:
return "wback";
case vdfs_trace_data_fstype:
return "fstyp";
case vdfs_trace_data_sb:
return "super";
case vdfs_trace_data_rpmb:
return "RPMB";
case vdfs_trace_data_pivot:
return "pivot";
default:
return "NONE";
}
}
static const char *_ops_type_to_str(enum vdfs_trace_ops_type ops_type)
{
switch (ops_type) {
/* file operations */
case vdfs_trace_fops_dir_iterate:
return "iterate";
case vdfs_trace_fops_dir_fsync:
return "dir_sync";
case vdfs_trace_fops_write_iter:
return "write_iter";
case vdfs_trace_fops_read_iter:
return "read_iter";
case vdfs_trace_fops_splice_read:
return "splice_read";
case vdfs_trace_fops_open:
return "open";
case vdfs_trace_fops_fsync:
return "file_fsync";
/* req operations */
case vdfs_trace_req_read:
return "read";
case vdfs_trace_req_read_meta:
return "meta_read";
case vdfs_trace_req_write:
return "write";
case vdfs_trace_req_write_meta:
return "meta_write";
case vdfs_trace_req_discard:
return "discard";
case vdfs_trace_req_flush:
return "flush";
case vdfs_trace_req_etc:
return "etc";
/* fault operation */
case vdfs_trace_fault:
return "fault";
/* hw_decompress */
case vdfs_trace_decomp_hw:
return "hw_decomp";
case vdfs_trace_decomp_sw:
return "sw_decomp";
/* inode operations */
case vdfs_trace_iops_lookup:
return "lookup";
case vdfs_trace_iops_get_acl:
return "get_acl";
case vdfs_trace_iops_create:
return "create";
case vdfs_trace_iops_link:
return "link";
case vdfs_trace_iops_unlink:
return "unlink";
case vdfs_trace_iops_symlink:
return "symlink";
case vdfs_trace_iops_mkdir:
return "mkdir";
case vdfs_trace_iops_rmdir:
return "rmdir";
case vdfs_trace_iops_mknod:
return "mknod";
case vdfs_trace_iops_rename:
return "rename";
case vdfs_trace_iops_setattr:
return "setattr";
case vdfs_trace_iops_setxattr:
return "setxattr";
case vdfs_trace_iops_getxattr:
return "getxattr";
case vdfs_trace_iops_listxattr:
return "listxattr";
case vdfs_trace_iops_removexattr:
return "rmxattr";
#if 0
/* no allocated function for vdfs */
case vdfs_trace_iops_permission:
return "permit";
case vdfs_trace_iops_rename2:
return "rename2";
case vdfs_trace_iops_getattr:
return "getattr";
/* use kernel general function (not vdfs own)*/
case vdfs_trace_iops_follow_link:
return "fol_link";
case vdfs_trace_iops_readlink:
return "readlink";
case vdfs_trace_iops_put_link:
return "putlink";
#endif
/* address operations */
case vdfs_trace_aops_readpage:
return "readpage";
case vdfs_trace_aops_readpages:
return "readpages";
case vdfs_trace_aops_writepage:
return "write_page";
case vdfs_trace_aops_writepages:
return "write_pages";
case vdfs_trace_aops_write_begin:
return "write_begin";
case vdfs_trace_aops_write_end:
return "write_end";
case vdfs_trace_aops_bmap:
return "bmap";
case vdfs_trace_aops_direct_io:
return "direct_io";
case vdfs_trace_aops_tuned_chunk:
return "tuned_chunk";
/* write back */
case vdfs_trace_wb_writeback:
return "writeback";
/* filesystem type */
case vdfs_trace_fstype_mount:
return "mount";
/* super operations */
case vdfs_trace_sb_put_super:
return "put_super";
case vdfs_trace_sb_sync_fs:
return "sync_fs";
case vdfs_trace_sb_remount_fs:
return "remount_fs";
case vdfs_trace_sb_evict_inode:
return "evict_inode";
/* rpmb operations */
case vdfs_trace_rpmb_write:
return "write";
case vdfs_trace_rpmb_read:
return "read";
/* pivot */
case vdfs_trace_pivot_suspend:
return "suspend";
case vdfs_trace_pivot_resume:
return "resume";
default:
return "invalid";
}
}
static const char _ops_func_to_char(enum vdfs_trace_ops_type ops_type,
int sublist)
{
switch (ops_type) {
case vdfs_trace_fault:
return 'F';
case vdfs_trace_req_read:
case vdfs_trace_req_read_meta:
if (!sublist)
return 'L';
/* fall through */
case vdfs_trace_fops_dir_iterate:
case vdfs_trace_fops_read_iter:
case vdfs_trace_fops_splice_read:
case vdfs_trace_decomp_hw:
case vdfs_trace_decomp_sw:
case vdfs_trace_iops_lookup:
case vdfs_trace_iops_get_acl:
case vdfs_trace_iops_getxattr:
case vdfs_trace_iops_listxattr:
case vdfs_trace_aops_tuned_chunk:
case vdfs_trace_aops_readpage:
case vdfs_trace_aops_readpages:
case vdfs_trace_aops_bmap:
case vdfs_trace_rpmb_read:
return 'R';
case vdfs_trace_fops_write_iter:
case vdfs_trace_req_write:
case vdfs_trace_req_write_meta:
case vdfs_trace_iops_create:
case vdfs_trace_iops_link:
case vdfs_trace_iops_unlink:
case vdfs_trace_iops_symlink:
case vdfs_trace_iops_mkdir:
case vdfs_trace_iops_rmdir:
case vdfs_trace_iops_mknod:
case vdfs_trace_iops_rename:
case vdfs_trace_iops_setattr:
case vdfs_trace_iops_setxattr:
case vdfs_trace_iops_removexattr:
case vdfs_trace_aops_writepage:
case vdfs_trace_aops_writepages:
case vdfs_trace_aops_write_begin: