Commit | Line | Data |
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2056a782 JA |
1 | #ifndef BLKTRACE_H |
2 | #define BLKTRACE_H | |
3 | ||
2056a782 JA |
4 | #include <linux/blkdev.h> |
5 | #include <linux/relay.h> | |
62c2a7d9 | 6 | #include <linux/compat.h> |
607ca46e | 7 | #include <uapi/linux/blktrace_api.h> |
c0ddffa8 | 8 | |
c0ddffa8 | 9 | #if defined(CONFIG_BLK_DEV_IO_TRACE) |
157f9c00 ACM |
10 | |
11 | #include <linux/sysfs.h> | |
12 | ||
2056a782 JA |
13 | struct blk_trace { |
14 | int trace_state; | |
15 | struct rchan *rchan; | |
43cf38eb TH |
16 | unsigned long __percpu *sequence; |
17 | unsigned char __percpu *msg_data; | |
2056a782 JA |
18 | u16 act_mask; |
19 | u64 start_lba; | |
20 | u64 end_lba; | |
21 | u32 pid; | |
22 | u32 dev; | |
23 | struct dentry *dir; | |
24 | struct dentry *dropped_file; | |
02c62304 | 25 | struct dentry *msg_file; |
2056a782 JA |
26 | atomic_t dropped; |
27 | }; | |
28 | ||
2056a782 | 29 | extern int blk_trace_ioctl(struct block_device *, unsigned, char __user *); |
165125e1 | 30 | extern void blk_trace_shutdown(struct request_queue *); |
d0deef5b SD |
31 | extern int do_blk_trace_setup(struct request_queue *q, char *name, |
32 | dev_t dev, struct block_device *bdev, | |
33 | struct blk_user_trace_setup *buts); | |
b9075fa9 | 34 | extern __printf(2, 3) |
08e8138a | 35 | void __trace_note_message(struct blk_trace *, const char *fmt, ...); |
171044d4 | 36 | |
9d5f09a4 AB |
37 | /** |
38 | * blk_add_trace_msg - Add a (simple) message to the blktrace stream | |
39 | * @q: queue the io is for | |
40 | * @fmt: format to print message in | |
41 | * args... Variable argument list for format | |
42 | * | |
43 | * Description: | |
44 | * Records a (simple) message onto the blktrace stream. | |
45 | * | |
46 | * NOTE: BLK_TN_MAX_MSG characters are output at most. | |
47 | * NOTE: Can not use 'static inline' due to presence of var args... | |
48 | * | |
49 | **/ | |
50 | #define blk_add_trace_msg(q, fmt, ...) \ | |
51 | do { \ | |
52 | struct blk_trace *bt = (q)->blk_trace; \ | |
53 | if (unlikely(bt)) \ | |
54 | __trace_note_message(bt, fmt, ##__VA_ARGS__); \ | |
55 | } while (0) | |
64565911 | 56 | #define BLK_TN_MAX_MSG 128 |
2056a782 | 57 | |
5f3ea37c ACM |
58 | extern void blk_add_driver_data(struct request_queue *q, struct request *rq, |
59 | void *data, size_t len); | |
7da975a2 | 60 | extern int blk_trace_setup(struct request_queue *q, char *name, dev_t dev, |
d0deef5b | 61 | struct block_device *bdev, |
6da127ad | 62 | char __user *arg); |
7da975a2 MP |
63 | extern int blk_trace_startstop(struct request_queue *q, int start); |
64 | extern int blk_trace_remove(struct request_queue *q); | |
48c0d4d4 | 65 | extern void blk_trace_remove_sysfs(struct device *dev); |
1d54ad6d | 66 | extern int blk_trace_init_sysfs(struct device *dev); |
6da127ad | 67 | |
157f9c00 ACM |
68 | extern struct attribute_group blk_trace_attr_group; |
69 | ||
2056a782 | 70 | #else /* !CONFIG_BLK_DEV_IO_TRACE */ |
d0deef5b SD |
71 | # define blk_trace_ioctl(bdev, cmd, arg) (-ENOTTY) |
72 | # define blk_trace_shutdown(q) do { } while (0) | |
73 | # define do_blk_trace_setup(q, name, dev, bdev, buts) (-ENOTTY) | |
74 | # define blk_add_driver_data(q, rq, data, len) do {} while (0) | |
75 | # define blk_trace_setup(q, name, dev, bdev, arg) (-ENOTTY) | |
76 | # define blk_trace_startstop(q, start) (-ENOTTY) | |
77 | # define blk_trace_remove(q) (-ENOTTY) | |
78 | # define blk_add_trace_msg(q, fmt, ...) do { } while (0) | |
b0da3f0d | 79 | # define blk_trace_remove_sysfs(dev) do { } while (0) |
1d54ad6d LZ |
80 | static inline int blk_trace_init_sysfs(struct device *dev) |
81 | { | |
82 | return 0; | |
83 | } | |
84 | ||
2056a782 | 85 | #endif /* CONFIG_BLK_DEV_IO_TRACE */ |
d0deef5b | 86 | |
2669b19f SR |
87 | #ifdef CONFIG_COMPAT |
88 | ||
89 | struct compat_blk_user_trace_setup { | |
90 | char name[32]; | |
91 | u16 act_mask; | |
92 | u32 buf_size; | |
93 | u32 buf_nr; | |
94 | compat_u64 start_lba; | |
95 | compat_u64 end_lba; | |
96 | u32 pid; | |
97 | }; | |
98 | #define BLKTRACESETUP32 _IOWR(0x12, 115, struct compat_blk_user_trace_setup) | |
99 | ||
100 | #endif | |
101 | ||
f1db457c | 102 | #if defined(CONFIG_EVENT_TRACING) && defined(CONFIG_BLOCK) |
55782138 LZ |
103 | |
104 | static inline int blk_cmd_buf_len(struct request *rq) | |
105 | { | |
33659ebb | 106 | return (rq->cmd_type == REQ_TYPE_BLOCK_PC) ? rq->cmd_len * 3 : 1; |
55782138 LZ |
107 | } |
108 | ||
109 | extern void blk_dump_cmd(char *buf, struct request *rq); | |
110 | extern void blk_fill_rwbs(char *rwbs, u32 rw, int bytes); | |
55782138 | 111 | |
f1db457c | 112 | #endif /* CONFIG_EVENT_TRACING && CONFIG_BLOCK */ |
55782138 | 113 | |
2056a782 | 114 | #endif |