Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * tape device driver for S/390 and zSeries tapes. |
3 | * | |
4 | * S390 and zSeries version | |
a53c8fab | 5 | * Copyright IBM Corp. 2001 |
1da177e4 LT |
6 | * Author(s): Carsten Otte <cotte@de.ibm.com> |
7 | * Michael Holzheu <holzheu@de.ibm.com> | |
8 | * Tuan Ngo-Anh <ngoanh@de.ibm.com> | |
9 | * | |
10 | * PROCFS Functions | |
11 | */ | |
12 | ||
bb509912 MH |
13 | #define KMSG_COMPONENT "tape" |
14 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
15 | ||
1da177e4 LT |
16 | #include <linux/module.h> |
17 | #include <linux/vmalloc.h> | |
18 | #include <linux/seq_file.h> | |
66a464db | 19 | #include <linux/proc_fs.h> |
1da177e4 LT |
20 | |
21 | #define TAPE_DBF_AREA tape_core_dbf | |
22 | ||
23 | #include "tape.h" | |
24 | ||
1da177e4 LT |
25 | static const char *tape_med_st_verbose[MS_SIZE] = |
26 | { | |
27 | [MS_UNKNOWN] = "UNKNOWN ", | |
28 | [MS_LOADED] = "LOADED ", | |
29 | [MS_UNLOADED] = "UNLOADED" | |
30 | }; | |
31 | ||
32 | /* our proc tapedevices entry */ | |
33 | static struct proc_dir_entry *tape_proc_devices; | |
34 | ||
35 | /* | |
36 | * Show function for /proc/tapedevices | |
37 | */ | |
38 | static int tape_proc_show(struct seq_file *m, void *v) | |
39 | { | |
40 | struct tape_device *device; | |
41 | struct tape_request *request; | |
42 | const char *str; | |
43 | unsigned long n; | |
44 | ||
45 | n = (unsigned long) v - 1; | |
46 | if (!n) { | |
47 | seq_printf(m, "TapeNo\tBusID CuType/Model\t" | |
48 | "DevType/Model\tBlkSize\tState\tOp\tMedState\n"); | |
49 | } | |
8fd138c3 | 50 | device = tape_find_device(n); |
1da177e4 LT |
51 | if (IS_ERR(device)) |
52 | return 0; | |
53 | spin_lock_irq(get_ccwdev_lock(device->cdev)); | |
54 | seq_printf(m, "%d\t", (int) n); | |
2a0217d5 | 55 | seq_printf(m, "%-10.10s ", dev_name(&device->cdev->dev)); |
1da177e4 LT |
56 | seq_printf(m, "%04X/", device->cdev->id.cu_type); |
57 | seq_printf(m, "%02X\t", device->cdev->id.cu_model); | |
58 | seq_printf(m, "%04X/", device->cdev->id.dev_type); | |
59 | seq_printf(m, "%02X\t\t", device->cdev->id.dev_model); | |
60 | if (device->char_data.block_size == 0) | |
61 | seq_printf(m, "auto\t"); | |
62 | else | |
63 | seq_printf(m, "%i\t", device->char_data.block_size); | |
64 | if (device->tape_state >= 0 && | |
65 | device->tape_state < TS_SIZE) | |
66 | str = tape_state_verbose[device->tape_state]; | |
67 | else | |
68 | str = "UNKNOWN"; | |
69 | seq_printf(m, "%s\t", str); | |
70 | if (!list_empty(&device->req_queue)) { | |
71 | request = list_entry(device->req_queue.next, | |
72 | struct tape_request, list); | |
73 | str = tape_op_verbose[request->op]; | |
74 | } else | |
75 | str = "---"; | |
76 | seq_printf(m, "%s\t", str); | |
77 | seq_printf(m, "%s\n", tape_med_st_verbose[device->medium_state]); | |
78 | spin_unlock_irq(get_ccwdev_lock(device->cdev)); | |
79 | tape_put_device(device); | |
80 | return 0; | |
81 | } | |
82 | ||
83 | static void *tape_proc_start(struct seq_file *m, loff_t *pos) | |
84 | { | |
85 | if (*pos >= 256 / TAPE_MINORS_PER_DEV) | |
86 | return NULL; | |
87 | return (void *)((unsigned long) *pos + 1); | |
88 | } | |
89 | ||
90 | static void *tape_proc_next(struct seq_file *m, void *v, loff_t *pos) | |
91 | { | |
92 | ++*pos; | |
93 | return tape_proc_start(m, pos); | |
94 | } | |
95 | ||
96 | static void tape_proc_stop(struct seq_file *m, void *v) | |
97 | { | |
98 | } | |
99 | ||
5c81cdbe | 100 | static const struct seq_operations tape_proc_seq = { |
1da177e4 LT |
101 | .start = tape_proc_start, |
102 | .next = tape_proc_next, | |
103 | .stop = tape_proc_stop, | |
104 | .show = tape_proc_show, | |
105 | }; | |
106 | ||
107 | static int tape_proc_open(struct inode *inode, struct file *file) | |
108 | { | |
109 | return seq_open(file, &tape_proc_seq); | |
110 | } | |
111 | ||
d54b1fdb | 112 | static const struct file_operations tape_proc_ops = |
1da177e4 | 113 | { |
8b594007 | 114 | .owner = THIS_MODULE, |
1da177e4 LT |
115 | .open = tape_proc_open, |
116 | .read = seq_read, | |
117 | .llseek = seq_lseek, | |
118 | .release = seq_release, | |
119 | }; | |
120 | ||
121 | /* | |
122 | * Initialize procfs stuff on startup | |
123 | */ | |
124 | void | |
125 | tape_proc_init(void) | |
126 | { | |
127 | tape_proc_devices = | |
8b594007 DL |
128 | proc_create("tapedevices", S_IFREG | S_IRUGO | S_IWUSR, NULL, |
129 | &tape_proc_ops); | |
1da177e4 | 130 | if (tape_proc_devices == NULL) { |
1da177e4 LT |
131 | return; |
132 | } | |
1da177e4 LT |
133 | } |
134 | ||
135 | /* | |
136 | * Cleanup all stuff registered to the procfs | |
137 | */ | |
138 | void | |
139 | tape_proc_cleanup(void) | |
140 | { | |
141 | if (tape_proc_devices != NULL) | |
c74c120a | 142 | remove_proc_entry ("tapedevices", NULL); |
1da177e4 | 143 | } |