Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
553448f6 | 2 | * zfcp device driver |
1da177e4 | 3 | * |
553448f6 | 4 | * sysfs interface for zfcp unit. |
1da177e4 | 5 | * |
553448f6 | 6 | * Copyright IBM Corporation 2002, 2008 |
1da177e4 LT |
7 | */ |
8 | ||
1da177e4 LT |
9 | #include "zfcp_ext.h" |
10 | ||
1da177e4 LT |
11 | /** |
12 | * zfcp_sysfs_unit_release - gets called when a struct device unit is released | |
13 | * @dev: pointer to belonging device | |
14 | */ | |
15 | void | |
16 | zfcp_sysfs_unit_release(struct device *dev) | |
17 | { | |
18 | kfree(dev); | |
19 | } | |
20 | ||
21 | /** | |
22 | * ZFCP_DEFINE_UNIT_ATTR | |
23 | * @_name: name of show attribute | |
24 | * @_format: format string | |
25 | * @_value: value to print | |
26 | * | |
27 | * Generates attribute for a unit. | |
28 | */ | |
29 | #define ZFCP_DEFINE_UNIT_ATTR(_name, _format, _value) \ | |
10523b3b | 30 | static ssize_t zfcp_sysfs_unit_##_name##_show(struct device *dev, struct device_attribute *attr, \ |
1da177e4 LT |
31 | char *buf) \ |
32 | { \ | |
33 | struct zfcp_unit *unit; \ | |
34 | \ | |
35 | unit = dev_get_drvdata(dev); \ | |
36 | return sprintf(buf, _format, _value); \ | |
37 | } \ | |
38 | \ | |
39 | static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_unit_##_name##_show, NULL); | |
40 | ||
41 | ZFCP_DEFINE_UNIT_ATTR(status, "0x%08x\n", atomic_read(&unit->status)); | |
1da177e4 LT |
42 | ZFCP_DEFINE_UNIT_ATTR(in_recovery, "%d\n", atomic_test_mask |
43 | (ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status)); | |
44 | ZFCP_DEFINE_UNIT_ATTR(access_denied, "%d\n", atomic_test_mask | |
45 | (ZFCP_STATUS_COMMON_ACCESS_DENIED, &unit->status)); | |
46 | ZFCP_DEFINE_UNIT_ATTR(access_shared, "%d\n", atomic_test_mask | |
47 | (ZFCP_STATUS_UNIT_SHARED, &unit->status)); | |
48 | ZFCP_DEFINE_UNIT_ATTR(access_readonly, "%d\n", atomic_test_mask | |
49 | (ZFCP_STATUS_UNIT_READONLY, &unit->status)); | |
50 | ||
51 | /** | |
52 | * zfcp_sysfs_unit_failed_store - failed state of unit | |
53 | * @dev: pointer to belonging device | |
54 | * @buf: pointer to input buffer | |
55 | * @count: number of bytes in buffer | |
56 | * | |
57 | * Store function of the "failed" attribute of a unit. | |
58 | * If a "0" gets written to "failed", error recovery will be | |
59 | * started for the belonging unit. | |
60 | */ | |
61 | static ssize_t | |
10523b3b | 62 | zfcp_sysfs_unit_failed_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
63 | { |
64 | struct zfcp_unit *unit; | |
65 | unsigned int val; | |
66 | char *endp; | |
67 | int retval = 0; | |
68 | ||
69 | down(&zfcp_data.config_sema); | |
70 | unit = dev_get_drvdata(dev); | |
71 | if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status)) { | |
72 | retval = -EBUSY; | |
73 | goto out; | |
74 | } | |
75 | ||
76 | val = simple_strtoul(buf, &endp, 0); | |
77 | if (((endp + 1) < (buf + count)) || (val != 0)) { | |
78 | retval = -EINVAL; | |
79 | goto out; | |
80 | } | |
81 | ||
1f6f7129 | 82 | zfcp_erp_modify_unit_status(unit, 46, NULL, |
698ec016 | 83 | ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET); |
1f6f7129 | 84 | zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED, 97, NULL); |
1da177e4 LT |
85 | zfcp_erp_wait(unit->port->adapter); |
86 | out: | |
87 | up(&zfcp_data.config_sema); | |
88 | return retval ? retval : (ssize_t) count; | |
89 | } | |
90 | ||
91 | /** | |
92 | * zfcp_sysfs_unit_failed_show - failed state of unit | |
93 | * @dev: pointer to belonging device | |
94 | * @buf: pointer to input buffer | |
95 | * | |
96 | * Show function of "failed" attribute of unit. Will be | |
97 | * "0" if unit is working, otherwise "1". | |
98 | */ | |
99 | static ssize_t | |
10523b3b | 100 | zfcp_sysfs_unit_failed_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
101 | { |
102 | struct zfcp_unit *unit; | |
103 | ||
104 | unit = dev_get_drvdata(dev); | |
105 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &unit->status)) | |
106 | return sprintf(buf, "1\n"); | |
107 | else | |
108 | return sprintf(buf, "0\n"); | |
109 | } | |
110 | ||
111 | static DEVICE_ATTR(failed, S_IWUSR | S_IRUGO, zfcp_sysfs_unit_failed_show, | |
112 | zfcp_sysfs_unit_failed_store); | |
113 | ||
114 | static struct attribute *zfcp_unit_attrs[] = { | |
1da177e4 LT |
115 | &dev_attr_failed.attr, |
116 | &dev_attr_in_recovery.attr, | |
117 | &dev_attr_status.attr, | |
118 | &dev_attr_access_denied.attr, | |
119 | &dev_attr_access_shared.attr, | |
120 | &dev_attr_access_readonly.attr, | |
121 | NULL | |
122 | }; | |
123 | ||
124 | static struct attribute_group zfcp_unit_attr_group = { | |
125 | .attrs = zfcp_unit_attrs, | |
126 | }; | |
127 | ||
41fa2ada | 128 | /** |
1da177e4 LT |
129 | * zfcp_sysfs_create_unit_files - create sysfs unit files |
130 | * @dev: pointer to belonging device | |
131 | * | |
132 | * Create all attributes of the sysfs representation of a unit. | |
133 | */ | |
134 | int | |
135 | zfcp_sysfs_unit_create_files(struct device *dev) | |
136 | { | |
137 | return sysfs_create_group(&dev->kobj, &zfcp_unit_attr_group); | |
138 | } | |
139 | ||
41fa2ada | 140 | /** |
1da177e4 LT |
141 | * zfcp_sysfs_remove_unit_files - remove sysfs unit files |
142 | * @dev: pointer to belonging device | |
143 | * | |
144 | * Remove all attributes of the sysfs representation of a unit. | |
145 | */ | |
146 | void | |
147 | zfcp_sysfs_unit_remove_files(struct device *dev) | |
148 | { | |
149 | sysfs_remove_group(&dev->kobj, &zfcp_unit_attr_group); | |
150 | } |