Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * scsi_sysfs.c |
| 3 | * |
| 4 | * SCSI sysfs interface routines. |
| 5 | * |
| 6 | * Created to pull SCSI mid layer sysfs routines into one file. |
| 7 | */ |
| 8 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | #include <linux/module.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 10 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #include <linux/init.h> |
| 12 | #include <linux/blkdev.h> |
| 13 | #include <linux/device.h> |
Alan Stern | bc4f240 | 2010-06-17 10:41:42 -0400 | [diff] [blame] | 14 | #include <linux/pm_runtime.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | |
| 16 | #include <scsi/scsi.h> |
| 17 | #include <scsi/scsi_device.h> |
| 18 | #include <scsi/scsi_host.h> |
| 19 | #include <scsi/scsi_tcq.h> |
Hannes Reinecke | 41f95dd | 2015-12-01 10:16:41 +0100 | [diff] [blame] | 20 | #include <scsi/scsi_dh.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include <scsi/scsi_transport.h> |
Adrian Bunk | 44818ef | 2007-07-09 11:59:59 -0700 | [diff] [blame] | 22 | #include <scsi/scsi_driver.h> |
Hannes Reinecke | 345e296 | 2017-10-02 16:26:34 +0200 | [diff] [blame] | 23 | #include <scsi/scsi_devinfo.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | |
| 25 | #include "scsi_priv.h" |
| 26 | #include "scsi_logging.h" |
| 27 | |
Hannes Reinecke | b0ed433 | 2008-03-18 14:32:28 +0100 | [diff] [blame] | 28 | static struct device_type scsi_dev_type; |
| 29 | |
Arjan van de Ven | 0ad7820 | 2005-11-28 16:22:25 +0100 | [diff] [blame] | 30 | static const struct { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | enum scsi_device_state value; |
| 32 | char *name; |
| 33 | } sdev_states[] = { |
| 34 | { SDEV_CREATED, "created" }, |
| 35 | { SDEV_RUNNING, "running" }, |
| 36 | { SDEV_CANCEL, "cancel" }, |
| 37 | { SDEV_DEL, "deleted" }, |
| 38 | { SDEV_QUIESCE, "quiesce" }, |
| 39 | { SDEV_OFFLINE, "offline" }, |
Mike Christie | 1b8d262 | 2012-05-17 23:56:56 -0500 | [diff] [blame] | 40 | { SDEV_TRANSPORT_OFFLINE, "transport-offline" }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | { SDEV_BLOCK, "blocked" }, |
James Bottomley | 6f4267e | 2008-08-22 16:53:31 -0500 | [diff] [blame] | 42 | { SDEV_CREATED_BLOCK, "created-blocked" }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | }; |
| 44 | |
| 45 | const char *scsi_device_state_name(enum scsi_device_state state) |
| 46 | { |
| 47 | int i; |
| 48 | char *name = NULL; |
| 49 | |
Tobias Klauser | 6391a11 | 2006-06-08 22:23:48 -0700 | [diff] [blame] | 50 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | if (sdev_states[i].value == state) { |
| 52 | name = sdev_states[i].name; |
| 53 | break; |
| 54 | } |
| 55 | } |
| 56 | return name; |
| 57 | } |
| 58 | |
Arjan van de Ven | 0ad7820 | 2005-11-28 16:22:25 +0100 | [diff] [blame] | 59 | static const struct { |
Mike Anderson | d330187 | 2005-06-16 11:12:38 -0700 | [diff] [blame] | 60 | enum scsi_host_state value; |
| 61 | char *name; |
| 62 | } shost_states[] = { |
| 63 | { SHOST_CREATED, "created" }, |
| 64 | { SHOST_RUNNING, "running" }, |
| 65 | { SHOST_CANCEL, "cancel" }, |
| 66 | { SHOST_DEL, "deleted" }, |
| 67 | { SHOST_RECOVERY, "recovery" }, |
James Bottomley | 939647e | 2005-09-18 15:05:20 -0500 | [diff] [blame] | 68 | { SHOST_CANCEL_RECOVERY, "cancel/recovery" }, |
| 69 | { SHOST_DEL_RECOVERY, "deleted/recovery", }, |
Mike Anderson | d330187 | 2005-06-16 11:12:38 -0700 | [diff] [blame] | 70 | }; |
| 71 | const char *scsi_host_state_name(enum scsi_host_state state) |
| 72 | { |
| 73 | int i; |
| 74 | char *name = NULL; |
| 75 | |
Tobias Klauser | 6391a11 | 2006-06-08 22:23:48 -0700 | [diff] [blame] | 76 | for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
Mike Anderson | d330187 | 2005-06-16 11:12:38 -0700 | [diff] [blame] | 77 | if (shost_states[i].value == state) { |
| 78 | name = shost_states[i].name; |
| 79 | break; |
| 80 | } |
| 81 | } |
| 82 | return name; |
| 83 | } |
| 84 | |
Bart Van Assche | d78540d | 2016-03-28 11:13:16 -0700 | [diff] [blame] | 85 | #ifdef CONFIG_SCSI_DH |
Hannes Reinecke | 77c9df9 | 2016-03-03 07:54:07 +0100 | [diff] [blame] | 86 | static const struct { |
| 87 | unsigned char value; |
| 88 | char *name; |
| 89 | } sdev_access_states[] = { |
| 90 | { SCSI_ACCESS_STATE_OPTIMAL, "active/optimized" }, |
| 91 | { SCSI_ACCESS_STATE_ACTIVE, "active/non-optimized" }, |
| 92 | { SCSI_ACCESS_STATE_STANDBY, "standby" }, |
| 93 | { SCSI_ACCESS_STATE_UNAVAILABLE, "unavailable" }, |
| 94 | { SCSI_ACCESS_STATE_LBA, "lba-dependent" }, |
| 95 | { SCSI_ACCESS_STATE_OFFLINE, "offline" }, |
| 96 | { SCSI_ACCESS_STATE_TRANSITIONING, "transitioning" }, |
| 97 | }; |
| 98 | |
Bart Van Assche | d78540d | 2016-03-28 11:13:16 -0700 | [diff] [blame] | 99 | static const char *scsi_access_state_name(unsigned char state) |
Hannes Reinecke | 77c9df9 | 2016-03-03 07:54:07 +0100 | [diff] [blame] | 100 | { |
| 101 | int i; |
| 102 | char *name = NULL; |
| 103 | |
| 104 | for (i = 0; i < ARRAY_SIZE(sdev_access_states); i++) { |
| 105 | if (sdev_access_states[i].value == state) { |
| 106 | name = sdev_access_states[i].name; |
| 107 | break; |
| 108 | } |
| 109 | } |
| 110 | return name; |
| 111 | } |
Bart Van Assche | d78540d | 2016-03-28 11:13:16 -0700 | [diff] [blame] | 112 | #endif |
Hannes Reinecke | 77c9df9 | 2016-03-03 07:54:07 +0100 | [diff] [blame] | 113 | |
Hannes Reinecke | 9cb78c1 | 2014-06-25 15:27:36 +0200 | [diff] [blame] | 114 | static int check_set(unsigned long long *val, char *src) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | { |
| 116 | char *last; |
| 117 | |
Bart Van Assche | 3991e46 | 2017-08-25 13:46:30 -0700 | [diff] [blame] | 118 | if (strcmp(src, "-") == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | *val = SCAN_WILD_CARD; |
| 120 | } else { |
| 121 | /* |
| 122 | * Doesn't check for int overflow |
| 123 | */ |
Hannes Reinecke | 9cb78c1 | 2014-06-25 15:27:36 +0200 | [diff] [blame] | 124 | *val = simple_strtoull(src, &last, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | if (*last != '\0') |
| 126 | return 1; |
| 127 | } |
| 128 | return 0; |
| 129 | } |
| 130 | |
| 131 | static int scsi_scan(struct Scsi_Host *shost, const char *str) |
| 132 | { |
Hannes Reinecke | 9cb78c1 | 2014-06-25 15:27:36 +0200 | [diff] [blame] | 133 | char s1[15], s2[15], s3[17], junk; |
| 134 | unsigned long long channel, id, lun; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | int res; |
| 136 | |
Hannes Reinecke | 9cb78c1 | 2014-06-25 15:27:36 +0200 | [diff] [blame] | 137 | res = sscanf(str, "%10s %10s %16s %c", s1, s2, s3, &junk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | if (res != 3) |
| 139 | return -EINVAL; |
| 140 | if (check_set(&channel, s1)) |
| 141 | return -EINVAL; |
| 142 | if (check_set(&id, s2)) |
| 143 | return -EINVAL; |
| 144 | if (check_set(&lun, s3)) |
| 145 | return -EINVAL; |
Christoph Hellwig | e02f3f5 | 2006-01-13 19:04:00 +0100 | [diff] [blame] | 146 | if (shost->transportt->user_scan) |
| 147 | res = shost->transportt->user_scan(shost, channel, id, lun); |
| 148 | else |
Hannes Reinecke | 1d64508 | 2016-03-17 08:39:45 +0100 | [diff] [blame] | 149 | res = scsi_scan_host_selected(shost, channel, id, lun, |
| 150 | SCSI_SCAN_MANUAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | return res; |
| 152 | } |
| 153 | |
| 154 | /* |
| 155 | * shost_show_function: macro to create an attr function that can be used to |
| 156 | * show a non-bit field. |
| 157 | */ |
| 158 | #define shost_show_function(name, field, format_string) \ |
| 159 | static ssize_t \ |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 160 | show_##name (struct device *dev, struct device_attribute *attr, \ |
| 161 | char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | { \ |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 163 | struct Scsi_Host *shost = class_to_shost(dev); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | return snprintf (buf, 20, format_string, shost->field); \ |
| 165 | } |
| 166 | |
| 167 | /* |
| 168 | * shost_rd_attr: macro to create a function and attribute variable for a |
| 169 | * read only field. |
| 170 | */ |
| 171 | #define shost_rd_attr2(name, field, format_string) \ |
| 172 | shost_show_function(name, field, format_string) \ |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 173 | static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | |
| 175 | #define shost_rd_attr(field, format_string) \ |
| 176 | shost_rd_attr2(field, field, format_string) |
| 177 | |
| 178 | /* |
| 179 | * Create the actual show/store functions and data structures. |
| 180 | */ |
| 181 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 182 | static ssize_t |
| 183 | store_scan(struct device *dev, struct device_attribute *attr, |
| 184 | const char *buf, size_t count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 186 | struct Scsi_Host *shost = class_to_shost(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | int res; |
| 188 | |
| 189 | res = scsi_scan(shost, buf); |
| 190 | if (res == 0) |
| 191 | res = count; |
| 192 | return res; |
| 193 | }; |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 194 | static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | |
Mike Anderson | d330187 | 2005-06-16 11:12:38 -0700 | [diff] [blame] | 196 | static ssize_t |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 197 | store_shost_state(struct device *dev, struct device_attribute *attr, |
| 198 | const char *buf, size_t count) |
Mike Anderson | d330187 | 2005-06-16 11:12:38 -0700 | [diff] [blame] | 199 | { |
| 200 | int i; |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 201 | struct Scsi_Host *shost = class_to_shost(dev); |
Mike Anderson | d330187 | 2005-06-16 11:12:38 -0700 | [diff] [blame] | 202 | enum scsi_host_state state = 0; |
| 203 | |
Tobias Klauser | 6391a11 | 2006-06-08 22:23:48 -0700 | [diff] [blame] | 204 | for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
Mike Anderson | d330187 | 2005-06-16 11:12:38 -0700 | [diff] [blame] | 205 | const int len = strlen(shost_states[i].name); |
| 206 | if (strncmp(shost_states[i].name, buf, len) == 0 && |
| 207 | buf[len] == '\n') { |
| 208 | state = shost_states[i].value; |
| 209 | break; |
| 210 | } |
| 211 | } |
| 212 | if (!state) |
| 213 | return -EINVAL; |
| 214 | |
| 215 | if (scsi_host_set_state(shost, state)) |
| 216 | return -EINVAL; |
| 217 | return count; |
| 218 | } |
| 219 | |
| 220 | static ssize_t |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 221 | show_shost_state(struct device *dev, struct device_attribute *attr, char *buf) |
Mike Anderson | d330187 | 2005-06-16 11:12:38 -0700 | [diff] [blame] | 222 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 223 | struct Scsi_Host *shost = class_to_shost(dev); |
Mike Anderson | d330187 | 2005-06-16 11:12:38 -0700 | [diff] [blame] | 224 | const char *name = scsi_host_state_name(shost->shost_state); |
| 225 | |
| 226 | if (!name) |
| 227 | return -EINVAL; |
| 228 | |
| 229 | return snprintf(buf, 20, "%s\n", name); |
| 230 | } |
| 231 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 232 | /* DEVICE_ATTR(state) clashes with dev_attr_state for sdev */ |
Bart Van Assche | d78540d | 2016-03-28 11:13:16 -0700 | [diff] [blame] | 233 | static struct device_attribute dev_attr_hstate = |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 234 | __ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state); |
Mike Anderson | d330187 | 2005-06-16 11:12:38 -0700 | [diff] [blame] | 235 | |
FUJITA Tomonori | 5dc2b89 | 2007-09-01 02:02:20 +0900 | [diff] [blame] | 236 | static ssize_t |
| 237 | show_shost_mode(unsigned int mode, char *buf) |
| 238 | { |
| 239 | ssize_t len = 0; |
| 240 | |
| 241 | if (mode & MODE_INITIATOR) |
| 242 | len = sprintf(buf, "%s", "Initiator"); |
| 243 | |
| 244 | if (mode & MODE_TARGET) |
| 245 | len += sprintf(buf + len, "%s%s", len ? ", " : "", "Target"); |
| 246 | |
| 247 | len += sprintf(buf + len, "\n"); |
| 248 | |
| 249 | return len; |
| 250 | } |
| 251 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 252 | static ssize_t |
| 253 | show_shost_supported_mode(struct device *dev, struct device_attribute *attr, |
| 254 | char *buf) |
FUJITA Tomonori | 5dc2b89 | 2007-09-01 02:02:20 +0900 | [diff] [blame] | 255 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 256 | struct Scsi_Host *shost = class_to_shost(dev); |
James Bottomley | 7a39ac3 | 2007-09-25 22:45:53 -0500 | [diff] [blame] | 257 | unsigned int supported_mode = shost->hostt->supported_mode; |
FUJITA Tomonori | 5dc2b89 | 2007-09-01 02:02:20 +0900 | [diff] [blame] | 258 | |
James Bottomley | 7a39ac3 | 2007-09-25 22:45:53 -0500 | [diff] [blame] | 259 | if (supported_mode == MODE_UNKNOWN) |
| 260 | /* by default this should be initiator */ |
| 261 | supported_mode = MODE_INITIATOR; |
| 262 | |
| 263 | return show_shost_mode(supported_mode, buf); |
FUJITA Tomonori | 5dc2b89 | 2007-09-01 02:02:20 +0900 | [diff] [blame] | 264 | } |
| 265 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 266 | static DEVICE_ATTR(supported_mode, S_IRUGO | S_IWUSR, show_shost_supported_mode, NULL); |
FUJITA Tomonori | 5dc2b89 | 2007-09-01 02:02:20 +0900 | [diff] [blame] | 267 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 268 | static ssize_t |
| 269 | show_shost_active_mode(struct device *dev, |
| 270 | struct device_attribute *attr, char *buf) |
FUJITA Tomonori | 5dc2b89 | 2007-09-01 02:02:20 +0900 | [diff] [blame] | 271 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 272 | struct Scsi_Host *shost = class_to_shost(dev); |
FUJITA Tomonori | 5dc2b89 | 2007-09-01 02:02:20 +0900 | [diff] [blame] | 273 | |
| 274 | if (shost->active_mode == MODE_UNKNOWN) |
| 275 | return snprintf(buf, 20, "unknown\n"); |
| 276 | else |
| 277 | return show_shost_mode(shost->active_mode, buf); |
| 278 | } |
| 279 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 280 | static DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL); |
FUJITA Tomonori | 5dc2b89 | 2007-09-01 02:02:20 +0900 | [diff] [blame] | 281 | |
Sasha Levin | 072f19b | 2012-11-15 15:51:46 -0500 | [diff] [blame] | 282 | static int check_reset_type(const char *str) |
Vikas Chaudhary | 2944369 | 2011-08-12 02:51:28 -0700 | [diff] [blame] | 283 | { |
Sasha Levin | 072f19b | 2012-11-15 15:51:46 -0500 | [diff] [blame] | 284 | if (sysfs_streq(str, "adapter")) |
Vikas Chaudhary | 2944369 | 2011-08-12 02:51:28 -0700 | [diff] [blame] | 285 | return SCSI_ADAPTER_RESET; |
Sasha Levin | 072f19b | 2012-11-15 15:51:46 -0500 | [diff] [blame] | 286 | else if (sysfs_streq(str, "firmware")) |
Vikas Chaudhary | 2944369 | 2011-08-12 02:51:28 -0700 | [diff] [blame] | 287 | return SCSI_FIRMWARE_RESET; |
| 288 | else |
| 289 | return 0; |
| 290 | } |
| 291 | |
| 292 | static ssize_t |
| 293 | store_host_reset(struct device *dev, struct device_attribute *attr, |
| 294 | const char *buf, size_t count) |
| 295 | { |
| 296 | struct Scsi_Host *shost = class_to_shost(dev); |
| 297 | struct scsi_host_template *sht = shost->hostt; |
| 298 | int ret = -EINVAL; |
Vikas Chaudhary | 2944369 | 2011-08-12 02:51:28 -0700 | [diff] [blame] | 299 | int type; |
| 300 | |
Sasha Levin | 072f19b | 2012-11-15 15:51:46 -0500 | [diff] [blame] | 301 | type = check_reset_type(buf); |
Vikas Chaudhary | 2944369 | 2011-08-12 02:51:28 -0700 | [diff] [blame] | 302 | if (!type) |
| 303 | goto exit_store_host_reset; |
| 304 | |
| 305 | if (sht->host_reset) |
| 306 | ret = sht->host_reset(shost, type); |
weiping zhang | 92227b8 | 2017-08-11 01:52:17 +0800 | [diff] [blame] | 307 | else |
| 308 | ret = -EOPNOTSUPP; |
Vikas Chaudhary | 2944369 | 2011-08-12 02:51:28 -0700 | [diff] [blame] | 309 | |
| 310 | exit_store_host_reset: |
| 311 | if (ret == 0) |
| 312 | ret = count; |
| 313 | return ret; |
| 314 | } |
| 315 | |
| 316 | static DEVICE_ATTR(host_reset, S_IWUSR, NULL, store_host_reset); |
| 317 | |
Hannes Reinecke | b456202 | 2013-10-23 10:51:21 +0200 | [diff] [blame] | 318 | static ssize_t |
| 319 | show_shost_eh_deadline(struct device *dev, |
| 320 | struct device_attribute *attr, char *buf) |
| 321 | { |
| 322 | struct Scsi_Host *shost = class_to_shost(dev); |
| 323 | |
Ren Mingxin | bb3b621 | 2013-11-11 13:44:56 +0100 | [diff] [blame] | 324 | if (shost->eh_deadline == -1) |
| 325 | return snprintf(buf, strlen("off") + 2, "off\n"); |
| 326 | return sprintf(buf, "%u\n", shost->eh_deadline / HZ); |
Hannes Reinecke | b456202 | 2013-10-23 10:51:21 +0200 | [diff] [blame] | 327 | } |
| 328 | |
| 329 | static ssize_t |
| 330 | store_shost_eh_deadline(struct device *dev, struct device_attribute *attr, |
| 331 | const char *buf, size_t count) |
| 332 | { |
| 333 | struct Scsi_Host *shost = class_to_shost(dev); |
| 334 | int ret = -EINVAL; |
Ren Mingxin | bb3b621 | 2013-11-11 13:44:56 +0100 | [diff] [blame] | 335 | unsigned long deadline, flags; |
Hannes Reinecke | b456202 | 2013-10-23 10:51:21 +0200 | [diff] [blame] | 336 | |
Hannes Reinecke | ad469a5 | 2014-01-17 16:05:38 +0100 | [diff] [blame] | 337 | if (shost->transportt && |
| 338 | (shost->transportt->eh_strategy_handler || |
| 339 | !shost->hostt->eh_host_reset_handler)) |
Hannes Reinecke | b456202 | 2013-10-23 10:51:21 +0200 | [diff] [blame] | 340 | return ret; |
| 341 | |
Ren Mingxin | bb3b621 | 2013-11-11 13:44:56 +0100 | [diff] [blame] | 342 | if (!strncmp(buf, "off", strlen("off"))) |
| 343 | deadline = -1; |
| 344 | else { |
| 345 | ret = kstrtoul(buf, 10, &deadline); |
| 346 | if (ret) |
| 347 | return ret; |
| 348 | if (deadline * HZ > UINT_MAX) |
| 349 | return -EINVAL; |
Hannes Reinecke | b456202 | 2013-10-23 10:51:21 +0200 | [diff] [blame] | 350 | } |
Ren Mingxin | bb3b621 | 2013-11-11 13:44:56 +0100 | [diff] [blame] | 351 | |
| 352 | spin_lock_irqsave(shost->host_lock, flags); |
| 353 | if (scsi_host_in_recovery(shost)) |
| 354 | ret = -EBUSY; |
| 355 | else { |
| 356 | if (deadline == -1) |
| 357 | shost->eh_deadline = -1; |
| 358 | else |
| 359 | shost->eh_deadline = deadline * HZ; |
| 360 | |
| 361 | ret = count; |
| 362 | } |
| 363 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 364 | |
Hannes Reinecke | b456202 | 2013-10-23 10:51:21 +0200 | [diff] [blame] | 365 | return ret; |
| 366 | } |
| 367 | |
| 368 | static DEVICE_ATTR(eh_deadline, S_IRUGO | S_IWUSR, show_shost_eh_deadline, store_shost_eh_deadline); |
| 369 | |
Christoph Hellwig | d285203 | 2014-01-17 12:06:53 +0100 | [diff] [blame] | 370 | shost_rd_attr(use_blk_mq, "%d\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | shost_rd_attr(unique_id, "%u\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | shost_rd_attr(cmd_per_lun, "%hd\n"); |
James Bottomley | ed632da | 2006-10-16 10:06:27 -0500 | [diff] [blame] | 373 | shost_rd_attr(can_queue, "%hd\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | shost_rd_attr(sg_tablesize, "%hu\n"); |
Martin K. Petersen | 13f05c8 | 2010-09-10 20:50:10 +0200 | [diff] [blame] | 375 | shost_rd_attr(sg_prot_tablesize, "%hu\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | shost_rd_attr(unchecked_isa_dma, "%d\n"); |
Martin K. Petersen | 4469f98 | 2008-07-17 04:28:30 -0400 | [diff] [blame] | 377 | shost_rd_attr(prot_capabilities, "%u\n"); |
| 378 | shost_rd_attr(prot_guard_type, "%hd\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | shost_rd_attr2(proc_name, hostt->proc_name, "%s\n"); |
| 380 | |
Christoph Hellwig | 7466501 | 2014-01-22 15:29:29 +0100 | [diff] [blame] | 381 | static ssize_t |
| 382 | show_host_busy(struct device *dev, struct device_attribute *attr, char *buf) |
| 383 | { |
| 384 | struct Scsi_Host *shost = class_to_shost(dev); |
Ming Lei | c84b023 | 2018-06-24 22:03:26 +0800 | [diff] [blame] | 385 | return snprintf(buf, 20, "%d\n", scsi_host_busy(shost)); |
Christoph Hellwig | 7466501 | 2014-01-22 15:29:29 +0100 | [diff] [blame] | 386 | } |
| 387 | static DEVICE_ATTR(host_busy, S_IRUGO, show_host_busy, NULL); |
| 388 | |
Hannes Reinecke | f7120a4 | 2008-03-18 14:32:28 +0100 | [diff] [blame] | 389 | static struct attribute *scsi_sysfs_shost_attrs[] = { |
Christoph Hellwig | d285203 | 2014-01-17 12:06:53 +0100 | [diff] [blame] | 390 | &dev_attr_use_blk_mq.attr, |
Hannes Reinecke | f7120a4 | 2008-03-18 14:32:28 +0100 | [diff] [blame] | 391 | &dev_attr_unique_id.attr, |
| 392 | &dev_attr_host_busy.attr, |
| 393 | &dev_attr_cmd_per_lun.attr, |
| 394 | &dev_attr_can_queue.attr, |
| 395 | &dev_attr_sg_tablesize.attr, |
Martin K. Petersen | 13f05c8 | 2010-09-10 20:50:10 +0200 | [diff] [blame] | 396 | &dev_attr_sg_prot_tablesize.attr, |
Hannes Reinecke | f7120a4 | 2008-03-18 14:32:28 +0100 | [diff] [blame] | 397 | &dev_attr_unchecked_isa_dma.attr, |
| 398 | &dev_attr_proc_name.attr, |
| 399 | &dev_attr_scan.attr, |
| 400 | &dev_attr_hstate.attr, |
| 401 | &dev_attr_supported_mode.attr, |
| 402 | &dev_attr_active_mode.attr, |
Martin K. Petersen | 4469f98 | 2008-07-17 04:28:30 -0400 | [diff] [blame] | 403 | &dev_attr_prot_capabilities.attr, |
| 404 | &dev_attr_prot_guard_type.attr, |
Vikas Chaudhary | 2944369 | 2011-08-12 02:51:28 -0700 | [diff] [blame] | 405 | &dev_attr_host_reset.attr, |
Hannes Reinecke | b456202 | 2013-10-23 10:51:21 +0200 | [diff] [blame] | 406 | &dev_attr_eh_deadline.attr, |
Hannes Reinecke | f7120a4 | 2008-03-18 14:32:28 +0100 | [diff] [blame] | 407 | NULL |
| 408 | }; |
| 409 | |
Bart Van Assche | d78540d | 2016-03-28 11:13:16 -0700 | [diff] [blame] | 410 | static struct attribute_group scsi_shost_attr_group = { |
Hannes Reinecke | f7120a4 | 2008-03-18 14:32:28 +0100 | [diff] [blame] | 411 | .attrs = scsi_sysfs_shost_attrs, |
| 412 | }; |
| 413 | |
David Brownell | a4dbd67 | 2009-06-24 10:06:31 -0700 | [diff] [blame] | 414 | const struct attribute_group *scsi_sysfs_shost_attr_groups[] = { |
Hannes Reinecke | f7120a4 | 2008-03-18 14:32:28 +0100 | [diff] [blame] | 415 | &scsi_shost_attr_group, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | NULL |
| 417 | }; |
| 418 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 419 | static void scsi_device_cls_release(struct device *class_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | { |
| 421 | struct scsi_device *sdev; |
| 422 | |
| 423 | sdev = class_to_sdev(class_dev); |
| 424 | put_device(&sdev->sdev_gendev); |
| 425 | } |
| 426 | |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 427 | static void scsi_device_dev_release_usercontext(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | { |
| 429 | struct scsi_device *sdev; |
| 430 | struct device *parent; |
Jeff Garzik | a341cd0 | 2007-10-29 17:15:22 -0400 | [diff] [blame] | 431 | struct list_head *this, *tmp; |
Bart Van Assche | ccf1e00 | 2017-08-29 08:50:13 -0700 | [diff] [blame] | 432 | struct scsi_vpd *vpd_pg80 = NULL, *vpd_pg83 = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | unsigned long flags; |
| 434 | |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 435 | sdev = container_of(work, struct scsi_device, ew.work); |
| 436 | |
Junichi Nomura | 23695e4 | 2015-10-06 04:32:57 +0000 | [diff] [blame] | 437 | scsi_dh_release_device(sdev); |
| 438 | |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 439 | parent = sdev->sdev_gendev.parent; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | |
| 441 | spin_lock_irqsave(sdev->host->host_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | list_del(&sdev->siblings); |
| 443 | list_del(&sdev->same_target_siblings); |
| 444 | list_del(&sdev->starved_entry); |
| 445 | spin_unlock_irqrestore(sdev->host->host_lock, flags); |
| 446 | |
Jeff Garzik | a341cd0 | 2007-10-29 17:15:22 -0400 | [diff] [blame] | 447 | cancel_work_sync(&sdev->event_work); |
| 448 | |
| 449 | list_for_each_safe(this, tmp, &sdev->event_list) { |
| 450 | struct scsi_event *evt; |
| 451 | |
| 452 | evt = list_entry(this, struct scsi_event, node); |
| 453 | list_del(&evt->node); |
| 454 | kfree(evt); |
| 455 | } |
| 456 | |
James Bottomley | e73e079 | 2011-05-25 15:52:14 -0500 | [diff] [blame] | 457 | blk_put_queue(sdev->request_queue); |
James Bottomley | 86cbfb5 | 2011-04-22 10:39:59 -0500 | [diff] [blame] | 458 | /* NULL queue means the device can't be used */ |
| 459 | sdev->request_queue = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | |
Bart Van Assche | ccf1e00 | 2017-08-29 08:50:13 -0700 | [diff] [blame] | 461 | mutex_lock(&sdev->inquiry_mutex); |
| 462 | rcu_swap_protected(sdev->vpd_pg80, vpd_pg80, |
| 463 | lockdep_is_held(&sdev->inquiry_mutex)); |
| 464 | rcu_swap_protected(sdev->vpd_pg83, vpd_pg83, |
| 465 | lockdep_is_held(&sdev->inquiry_mutex)); |
| 466 | mutex_unlock(&sdev->inquiry_mutex); |
| 467 | |
| 468 | if (vpd_pg83) |
| 469 | kfree_rcu(vpd_pg83, rcu); |
| 470 | if (vpd_pg80) |
| 471 | kfree_rcu(vpd_pg80, rcu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | kfree(sdev->inquiry); |
| 473 | kfree(sdev); |
| 474 | |
| 475 | if (parent) |
| 476 | put_device(parent); |
| 477 | } |
| 478 | |
James Bottomley | 65110b2 | 2006-02-14 10:48:46 -0600 | [diff] [blame] | 479 | static void scsi_device_dev_release(struct device *dev) |
| 480 | { |
James Bottomley | ffedb45 | 2006-02-23 14:27:18 -0600 | [diff] [blame] | 481 | struct scsi_device *sdp = to_scsi_device(dev); |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 482 | execute_in_process_context(scsi_device_dev_release_usercontext, |
James Bottomley | ffedb45 | 2006-02-23 14:27:18 -0600 | [diff] [blame] | 483 | &sdp->ew); |
James Bottomley | 65110b2 | 2006-02-14 10:48:46 -0600 | [diff] [blame] | 484 | } |
| 485 | |
Adrian Bunk | 52c1da3 | 2005-06-23 22:05:33 -0700 | [diff] [blame] | 486 | static struct class sdev_class = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | .name = "scsi_device", |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 488 | .dev_release = scsi_device_cls_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | }; |
| 490 | |
| 491 | /* all probing is done in the individual ->probe routines */ |
| 492 | static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) |
| 493 | { |
Hannes Reinecke | b0ed433 | 2008-03-18 14:32:28 +0100 | [diff] [blame] | 494 | struct scsi_device *sdp; |
| 495 | |
| 496 | if (dev->type != &scsi_dev_type) |
| 497 | return 0; |
| 498 | |
| 499 | sdp = to_scsi_device(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | if (sdp->no_uld_attach) |
| 501 | return 0; |
| 502 | return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; |
| 503 | } |
| 504 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 505 | static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
Michael Tokarev | d7b8bcb | 2006-10-27 16:02:37 +0400 | [diff] [blame] | 506 | { |
James Bottomley | 1f42ea7 | 2008-05-22 12:34:41 +0100 | [diff] [blame] | 507 | struct scsi_device *sdev; |
| 508 | |
| 509 | if (dev->type != &scsi_dev_type) |
| 510 | return 0; |
| 511 | |
| 512 | sdev = to_scsi_device(dev); |
Michael Tokarev | d7b8bcb | 2006-10-27 16:02:37 +0400 | [diff] [blame] | 513 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 514 | add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type); |
Michael Tokarev | d7b8bcb | 2006-10-27 16:02:37 +0400 | [diff] [blame] | 515 | return 0; |
| 516 | } |
| 517 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | struct bus_type scsi_bus_type = { |
| 519 | .name = "scsi", |
| 520 | .match = scsi_bus_match, |
Michael Tokarev | d7b8bcb | 2006-10-27 16:02:37 +0400 | [diff] [blame] | 521 | .uevent = scsi_bus_uevent, |
Rafael J. Wysocki | aa33860 | 2011-02-11 00:06:54 +0100 | [diff] [blame] | 522 | #ifdef CONFIG_PM |
Alan Stern | db5bd1e | 2010-06-17 10:36:49 -0400 | [diff] [blame] | 523 | .pm = &scsi_bus_pm_ops, |
Alan Stern | e6da54d | 2010-08-05 13:17:10 -0400 | [diff] [blame] | 524 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | }; |
Chandra Seetharaman | a6a8d9f | 2008-05-01 14:49:46 -0700 | [diff] [blame] | 526 | EXPORT_SYMBOL_GPL(scsi_bus_type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | |
| 528 | int scsi_sysfs_register(void) |
| 529 | { |
| 530 | int error; |
| 531 | |
| 532 | error = bus_register(&scsi_bus_type); |
| 533 | if (!error) { |
| 534 | error = class_register(&sdev_class); |
| 535 | if (error) |
| 536 | bus_unregister(&scsi_bus_type); |
| 537 | } |
| 538 | |
| 539 | return error; |
| 540 | } |
| 541 | |
| 542 | void scsi_sysfs_unregister(void) |
| 543 | { |
| 544 | class_unregister(&sdev_class); |
| 545 | bus_unregister(&scsi_bus_type); |
| 546 | } |
| 547 | |
| 548 | /* |
| 549 | * sdev_show_function: macro to create an attr function that can be used to |
| 550 | * show a non-bit field. |
| 551 | */ |
| 552 | #define sdev_show_function(field, format_string) \ |
| 553 | static ssize_t \ |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 554 | sdev_show_##field (struct device *dev, struct device_attribute *attr, \ |
| 555 | char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | { \ |
| 557 | struct scsi_device *sdev; \ |
| 558 | sdev = to_scsi_device(dev); \ |
| 559 | return snprintf (buf, 20, format_string, sdev->field); \ |
| 560 | } \ |
| 561 | |
| 562 | /* |
| 563 | * sdev_rd_attr: macro to create a function and attribute variable for a |
| 564 | * read only field. |
| 565 | */ |
| 566 | #define sdev_rd_attr(field, format_string) \ |
| 567 | sdev_show_function(field, format_string) \ |
| 568 | static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL); |
| 569 | |
| 570 | |
| 571 | /* |
Tomohiro Kusumi | 160e7f6 | 2010-04-14 15:15:14 +0900 | [diff] [blame] | 572 | * sdev_rw_attr: create a function and attribute variable for a |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | * read/write field. |
| 574 | */ |
| 575 | #define sdev_rw_attr(field, format_string) \ |
| 576 | sdev_show_function(field, format_string) \ |
| 577 | \ |
| 578 | static ssize_t \ |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 579 | sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
| 580 | const char *buf, size_t count) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | { \ |
| 582 | struct scsi_device *sdev; \ |
| 583 | sdev = to_scsi_device(dev); \ |
Tomohiro Kusumi | 160e7f6 | 2010-04-14 15:15:14 +0900 | [diff] [blame] | 584 | sscanf (buf, format_string, &sdev->field); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | return count; \ |
| 586 | } \ |
| 587 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); |
| 588 | |
| 589 | /* Currently we don't export bit fields, but we might in future, |
| 590 | * so leave this code in */ |
| 591 | #if 0 |
| 592 | /* |
| 593 | * sdev_rd_attr: create a function and attribute variable for a |
| 594 | * read/write bit field. |
| 595 | */ |
| 596 | #define sdev_rw_attr_bit(field) \ |
| 597 | sdev_show_function(field, "%d\n") \ |
| 598 | \ |
| 599 | static ssize_t \ |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 600 | sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
| 601 | const char *buf, size_t count) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | { \ |
| 603 | int ret; \ |
| 604 | struct scsi_device *sdev; \ |
| 605 | ret = scsi_sdev_check_buf_bit(buf); \ |
| 606 | if (ret >= 0) { \ |
| 607 | sdev = to_scsi_device(dev); \ |
| 608 | sdev->field = ret; \ |
| 609 | ret = count; \ |
| 610 | } \ |
| 611 | return ret; \ |
| 612 | } \ |
| 613 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); |
| 614 | |
| 615 | /* |
| 616 | * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1", |
| 617 | * else return -EINVAL. |
| 618 | */ |
| 619 | static int scsi_sdev_check_buf_bit(const char *buf) |
| 620 | { |
| 621 | if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) { |
| 622 | if (buf[0] == '1') |
| 623 | return 1; |
| 624 | else if (buf[0] == '0') |
| 625 | return 0; |
| 626 | else |
| 627 | return -EINVAL; |
| 628 | } else |
| 629 | return -EINVAL; |
| 630 | } |
| 631 | #endif |
| 632 | /* |
| 633 | * Create the actual show/store functions and data structures. |
| 634 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | sdev_rd_attr (type, "%d\n"); |
| 636 | sdev_rd_attr (scsi_level, "%d\n"); |
| 637 | sdev_rd_attr (vendor, "%.8s\n"); |
| 638 | sdev_rd_attr (model, "%.16s\n"); |
| 639 | sdev_rd_attr (rev, "%.4s\n"); |
| 640 | |
Christoph Hellwig | 71e75c9 | 2014-04-11 19:07:01 +0200 | [diff] [blame] | 641 | static ssize_t |
| 642 | sdev_show_device_busy(struct device *dev, struct device_attribute *attr, |
| 643 | char *buf) |
| 644 | { |
| 645 | struct scsi_device *sdev = to_scsi_device(dev); |
| 646 | return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_busy)); |
| 647 | } |
| 648 | static DEVICE_ATTR(device_busy, S_IRUGO, sdev_show_device_busy, NULL); |
| 649 | |
Christoph Hellwig | cd9070c | 2014-01-23 12:07:41 +0100 | [diff] [blame] | 650 | static ssize_t |
| 651 | sdev_show_device_blocked(struct device *dev, struct device_attribute *attr, |
| 652 | char *buf) |
| 653 | { |
| 654 | struct scsi_device *sdev = to_scsi_device(dev); |
| 655 | return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_blocked)); |
| 656 | } |
| 657 | static DEVICE_ATTR(device_blocked, S_IRUGO, sdev_show_device_blocked, NULL); |
| 658 | |
Jens Axboe | 242f9dc | 2008-09-14 05:55:09 -0700 | [diff] [blame] | 659 | /* |
| 660 | * TODO: can we make these symlinks to the block layer ones? |
| 661 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | static ssize_t |
Yani Ioannou | 10523b3 | 2005-05-17 06:43:37 -0400 | [diff] [blame] | 663 | sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | { |
| 665 | struct scsi_device *sdev; |
| 666 | sdev = to_scsi_device(dev); |
Jens Axboe | 242f9dc | 2008-09-14 05:55:09 -0700 | [diff] [blame] | 667 | return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | } |
| 669 | |
| 670 | static ssize_t |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 671 | sdev_store_timeout (struct device *dev, struct device_attribute *attr, |
| 672 | const char *buf, size_t count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | { |
| 674 | struct scsi_device *sdev; |
| 675 | int timeout; |
| 676 | sdev = to_scsi_device(dev); |
| 677 | sscanf (buf, "%d\n", &timeout); |
Jens Axboe | 242f9dc | 2008-09-14 05:55:09 -0700 | [diff] [blame] | 678 | blk_queue_rq_timeout(sdev->request_queue, timeout * HZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | return count; |
| 680 | } |
| 681 | static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout); |
| 682 | |
| 683 | static ssize_t |
Martin K. Petersen | 0816c92 | 2013-05-10 10:36:04 -0400 | [diff] [blame] | 684 | sdev_show_eh_timeout(struct device *dev, struct device_attribute *attr, char *buf) |
| 685 | { |
| 686 | struct scsi_device *sdev; |
| 687 | sdev = to_scsi_device(dev); |
| 688 | return snprintf(buf, 20, "%u\n", sdev->eh_timeout / HZ); |
| 689 | } |
| 690 | |
| 691 | static ssize_t |
| 692 | sdev_store_eh_timeout(struct device *dev, struct device_attribute *attr, |
| 693 | const char *buf, size_t count) |
| 694 | { |
| 695 | struct scsi_device *sdev; |
| 696 | unsigned int eh_timeout; |
| 697 | int err; |
| 698 | |
| 699 | if (!capable(CAP_SYS_ADMIN)) |
| 700 | return -EACCES; |
| 701 | |
| 702 | sdev = to_scsi_device(dev); |
| 703 | err = kstrtouint(buf, 10, &eh_timeout); |
| 704 | if (err) |
| 705 | return err; |
| 706 | sdev->eh_timeout = eh_timeout * HZ; |
| 707 | |
| 708 | return count; |
| 709 | } |
| 710 | static DEVICE_ATTR(eh_timeout, S_IRUGO | S_IWUSR, sdev_show_eh_timeout, sdev_store_eh_timeout); |
| 711 | |
| 712 | static ssize_t |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 713 | store_rescan_field (struct device *dev, struct device_attribute *attr, |
| 714 | const char *buf, size_t count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | { |
| 716 | scsi_rescan_device(dev); |
| 717 | return count; |
| 718 | } |
| 719 | static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); |
| 720 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 721 | static ssize_t |
| 722 | sdev_store_delete(struct device *dev, struct device_attribute *attr, |
| 723 | const char *buf, size_t count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | { |
Bart Van Assche | 0ee223b | 2018-08-02 10:51:41 -0700 | [diff] [blame] | 725 | struct kernfs_node *kn; |
Yufen Yu | 0c69051 | 2019-10-15 21:05:56 +0800 | [diff] [blame] | 726 | struct scsi_device *sdev = to_scsi_device(dev); |
| 727 | |
| 728 | /* |
| 729 | * We need to try to get module, avoiding the module been removed |
| 730 | * during delete. |
| 731 | */ |
| 732 | if (scsi_device_get(sdev)) |
| 733 | return -ENODEV; |
Bart Van Assche | 0ee223b | 2018-08-02 10:51:41 -0700 | [diff] [blame] | 734 | |
| 735 | kn = sysfs_break_active_protection(&dev->kobj, &attr->attr); |
| 736 | WARN_ON_ONCE(!kn); |
| 737 | /* |
| 738 | * Concurrent writes into the "delete" sysfs attribute may trigger |
| 739 | * concurrent calls to device_remove_file() and scsi_remove_device(). |
| 740 | * device_remove_file() handles concurrent removal calls by |
| 741 | * serializing these and by ignoring the second and later removal |
| 742 | * attempts. Concurrent calls of scsi_remove_device() are |
| 743 | * serialized. The second and later calls of scsi_remove_device() are |
| 744 | * ignored because the first call of that function changes the device |
| 745 | * state into SDEV_DEL. |
| 746 | */ |
| 747 | device_remove_file(dev, attr); |
Yufen Yu | 0c69051 | 2019-10-15 21:05:56 +0800 | [diff] [blame] | 748 | scsi_remove_device(sdev); |
Bart Van Assche | 0ee223b | 2018-08-02 10:51:41 -0700 | [diff] [blame] | 749 | if (kn) |
| 750 | sysfs_unbreak_active_protection(kn); |
Yufen Yu | 0c69051 | 2019-10-15 21:05:56 +0800 | [diff] [blame] | 751 | scsi_device_put(sdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | return count; |
| 753 | }; |
| 754 | static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete); |
| 755 | |
| 756 | static ssize_t |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 757 | store_state_field(struct device *dev, struct device_attribute *attr, |
| 758 | const char *buf, size_t count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | { |
Bart Van Assche | 0db6ca8 | 2017-06-02 14:21:55 -0700 | [diff] [blame] | 760 | int i, ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | struct scsi_device *sdev = to_scsi_device(dev); |
| 762 | enum scsi_device_state state = 0; |
| 763 | |
Tobias Klauser | 6391a11 | 2006-06-08 22:23:48 -0700 | [diff] [blame] | 764 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | const int len = strlen(sdev_states[i].name); |
| 766 | if (strncmp(sdev_states[i].name, buf, len) == 0 && |
| 767 | buf[len] == '\n') { |
| 768 | state = sdev_states[i].value; |
| 769 | break; |
| 770 | } |
| 771 | } |
| 772 | if (!state) |
| 773 | return -EINVAL; |
| 774 | |
Bart Van Assche | 0db6ca8 | 2017-06-02 14:21:55 -0700 | [diff] [blame] | 775 | mutex_lock(&sdev->state_mutex); |
| 776 | ret = scsi_device_set_state(sdev, state); |
| 777 | mutex_unlock(&sdev->state_mutex); |
| 778 | |
| 779 | return ret == 0 ? count : -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | } |
| 781 | |
| 782 | static ssize_t |
Yani Ioannou | 10523b3 | 2005-05-17 06:43:37 -0400 | [diff] [blame] | 783 | show_state_field(struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | { |
| 785 | struct scsi_device *sdev = to_scsi_device(dev); |
| 786 | const char *name = scsi_device_state_name(sdev->sdev_state); |
| 787 | |
| 788 | if (!name) |
| 789 | return -EINVAL; |
| 790 | |
| 791 | return snprintf(buf, 20, "%s\n", name); |
| 792 | } |
| 793 | |
| 794 | static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field); |
| 795 | |
| 796 | static ssize_t |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 797 | show_queue_type_field(struct device *dev, struct device_attribute *attr, |
| 798 | char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | { |
| 800 | struct scsi_device *sdev = to_scsi_device(dev); |
| 801 | const char *name = "none"; |
| 802 | |
Christoph Hellwig | 609aa22 | 2014-10-30 11:54:58 +0100 | [diff] [blame] | 803 | if (sdev->simple_tags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | name = "simple"; |
| 805 | |
| 806 | return snprintf(buf, 20, "%s\n", name); |
| 807 | } |
| 808 | |
Hannes Reinecke | 276b20d | 2014-03-15 09:51:47 +0100 | [diff] [blame] | 809 | static ssize_t |
| 810 | store_queue_type_field(struct device *dev, struct device_attribute *attr, |
| 811 | const char *buf, size_t count) |
| 812 | { |
| 813 | struct scsi_device *sdev = to_scsi_device(dev); |
Hannes Reinecke | 276b20d | 2014-03-15 09:51:47 +0100 | [diff] [blame] | 814 | |
Christoph Hellwig | efc3c1d | 2014-11-24 15:36:18 +0100 | [diff] [blame] | 815 | if (!sdev->tagged_supported) |
Hannes Reinecke | 276b20d | 2014-03-15 09:51:47 +0100 | [diff] [blame] | 816 | return -EINVAL; |
Christoph Hellwig | efc3c1d | 2014-11-24 15:36:18 +0100 | [diff] [blame] | 817 | |
| 818 | sdev_printk(KERN_INFO, sdev, |
| 819 | "ignoring write to deprecated queue_type attribute"); |
Hannes Reinecke | 276b20d | 2014-03-15 09:51:47 +0100 | [diff] [blame] | 820 | return count; |
| 821 | } |
| 822 | |
| 823 | static DEVICE_ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field, |
| 824 | store_queue_type_field); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | |
Hannes Reinecke | b3ae878 | 2014-03-15 09:51:49 +0100 | [diff] [blame] | 826 | #define sdev_vpd_pg_attr(_page) \ |
| 827 | static ssize_t \ |
| 828 | show_vpd_##_page(struct file *filp, struct kobject *kobj, \ |
| 829 | struct bin_attribute *bin_attr, \ |
| 830 | char *buf, loff_t off, size_t count) \ |
| 831 | { \ |
| 832 | struct device *dev = container_of(kobj, struct device, kobj); \ |
| 833 | struct scsi_device *sdev = to_scsi_device(dev); \ |
Bart Van Assche | ccf1e00 | 2017-08-29 08:50:13 -0700 | [diff] [blame] | 834 | struct scsi_vpd *vpd_page; \ |
| 835 | int ret = -EINVAL; \ |
| 836 | \ |
Hannes Reinecke | 09e2b0b | 2015-11-09 13:24:28 +0100 | [diff] [blame] | 837 | rcu_read_lock(); \ |
Bart Van Assche | ccf1e00 | 2017-08-29 08:50:13 -0700 | [diff] [blame] | 838 | vpd_page = rcu_dereference(sdev->vpd_##_page); \ |
| 839 | if (vpd_page) \ |
| 840 | ret = memory_read_from_buffer(buf, count, &off, \ |
| 841 | vpd_page->data, vpd_page->len); \ |
Hannes Reinecke | 09e2b0b | 2015-11-09 13:24:28 +0100 | [diff] [blame] | 842 | rcu_read_unlock(); \ |
Bart Van Assche | ccf1e00 | 2017-08-29 08:50:13 -0700 | [diff] [blame] | 843 | return ret; \ |
Hannes Reinecke | b3ae878 | 2014-03-15 09:51:49 +0100 | [diff] [blame] | 844 | } \ |
| 845 | static struct bin_attribute dev_attr_vpd_##_page = { \ |
| 846 | .attr = {.name = __stringify(vpd_##_page), .mode = S_IRUGO }, \ |
| 847 | .size = 0, \ |
| 848 | .read = show_vpd_##_page, \ |
| 849 | }; |
| 850 | |
| 851 | sdev_vpd_pg_attr(pg83); |
| 852 | sdev_vpd_pg_attr(pg80); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | |
Johannes Thumshirn | 92e6246 | 2015-11-09 10:56:57 +0100 | [diff] [blame] | 854 | static ssize_t show_inquiry(struct file *filep, struct kobject *kobj, |
| 855 | struct bin_attribute *bin_attr, |
| 856 | char *buf, loff_t off, size_t count) |
| 857 | { |
| 858 | struct device *dev = container_of(kobj, struct device, kobj); |
| 859 | struct scsi_device *sdev = to_scsi_device(dev); |
| 860 | |
| 861 | if (!sdev->inquiry) |
| 862 | return -EINVAL; |
| 863 | |
| 864 | return memory_read_from_buffer(buf, count, &off, sdev->inquiry, |
| 865 | sdev->inquiry_len); |
| 866 | } |
| 867 | |
| 868 | static struct bin_attribute dev_attr_inquiry = { |
| 869 | .attr = { |
| 870 | .name = "inquiry", |
| 871 | .mode = S_IRUGO, |
| 872 | }, |
| 873 | .size = 0, |
| 874 | .read = show_inquiry, |
| 875 | }; |
| 876 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | static ssize_t |
Hannes Reinecke | b3ae878 | 2014-03-15 09:51:49 +0100 | [diff] [blame] | 878 | show_iostat_counterbits(struct device *dev, struct device_attribute *attr, |
| 879 | char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | { |
| 881 | return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8); |
| 882 | } |
| 883 | |
| 884 | static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL); |
| 885 | |
| 886 | #define show_sdev_iostat(field) \ |
| 887 | static ssize_t \ |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 888 | show_iostat_##field(struct device *dev, struct device_attribute *attr, \ |
| 889 | char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | { \ |
| 891 | struct scsi_device *sdev = to_scsi_device(dev); \ |
| 892 | unsigned long long count = atomic_read(&sdev->field); \ |
| 893 | return snprintf(buf, 20, "0x%llx\n", count); \ |
| 894 | } \ |
| 895 | static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL) |
| 896 | |
| 897 | show_sdev_iostat(iorequest_cnt); |
| 898 | show_sdev_iostat(iodone_cnt); |
| 899 | show_sdev_iostat(ioerr_cnt); |
| 900 | |
Michael Tokarev | d7b8bcb | 2006-10-27 16:02:37 +0400 | [diff] [blame] | 901 | static ssize_t |
| 902 | sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf) |
| 903 | { |
| 904 | struct scsi_device *sdev; |
| 905 | sdev = to_scsi_device(dev); |
| 906 | return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type); |
| 907 | } |
| 908 | static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | |
Jeff Garzik | a341cd0 | 2007-10-29 17:15:22 -0400 | [diff] [blame] | 910 | #define DECLARE_EVT_SHOW(name, Cap_name) \ |
| 911 | static ssize_t \ |
| 912 | sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \ |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 913 | char *buf) \ |
Jeff Garzik | a341cd0 | 2007-10-29 17:15:22 -0400 | [diff] [blame] | 914 | { \ |
| 915 | struct scsi_device *sdev = to_scsi_device(dev); \ |
| 916 | int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\ |
| 917 | return snprintf(buf, 20, "%d\n", val); \ |
| 918 | } |
| 919 | |
| 920 | #define DECLARE_EVT_STORE(name, Cap_name) \ |
| 921 | static ssize_t \ |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 922 | sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\ |
Jeff Garzik | a341cd0 | 2007-10-29 17:15:22 -0400 | [diff] [blame] | 923 | const char *buf, size_t count) \ |
| 924 | { \ |
| 925 | struct scsi_device *sdev = to_scsi_device(dev); \ |
| 926 | int val = simple_strtoul(buf, NULL, 0); \ |
| 927 | if (val == 0) \ |
| 928 | clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ |
| 929 | else if (val == 1) \ |
| 930 | set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ |
| 931 | else \ |
| 932 | return -EINVAL; \ |
| 933 | return count; \ |
| 934 | } |
| 935 | |
| 936 | #define DECLARE_EVT(name, Cap_name) \ |
| 937 | DECLARE_EVT_SHOW(name, Cap_name) \ |
| 938 | DECLARE_EVT_STORE(name, Cap_name) \ |
| 939 | static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \ |
| 940 | sdev_store_evt_##name); |
| 941 | #define REF_EVT(name) &dev_attr_evt_##name.attr |
| 942 | |
| 943 | DECLARE_EVT(media_change, MEDIA_CHANGE) |
Ewan D. Milne | 279afdf | 2013-08-08 15:07:48 -0400 | [diff] [blame] | 944 | DECLARE_EVT(inquiry_change_reported, INQUIRY_CHANGE_REPORTED) |
| 945 | DECLARE_EVT(capacity_change_reported, CAPACITY_CHANGE_REPORTED) |
| 946 | DECLARE_EVT(soft_threshold_reached, SOFT_THRESHOLD_REACHED_REPORTED) |
| 947 | DECLARE_EVT(mode_parameter_change_reported, MODE_PARAMETER_CHANGE_REPORTED) |
| 948 | DECLARE_EVT(lun_change_reported, LUN_CHANGE_REPORTED) |
Jeff Garzik | a341cd0 | 2007-10-29 17:15:22 -0400 | [diff] [blame] | 949 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 950 | static ssize_t |
Hannes Reinecke | 276b20d | 2014-03-15 09:51:47 +0100 | [diff] [blame] | 951 | sdev_store_queue_depth(struct device *dev, struct device_attribute *attr, |
| 952 | const char *buf, size_t count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | { |
| 954 | int depth, retval; |
| 955 | struct scsi_device *sdev = to_scsi_device(dev); |
| 956 | struct scsi_host_template *sht = sdev->host->hostt; |
| 957 | |
| 958 | if (!sht->change_queue_depth) |
| 959 | return -EINVAL; |
| 960 | |
| 961 | depth = simple_strtoul(buf, NULL, 0); |
| 962 | |
Jens Axboe | 1278dd6 | 2015-07-13 08:24:39 -0600 | [diff] [blame] | 963 | if (depth < 1 || depth > sdev->host->can_queue) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | return -EINVAL; |
| 965 | |
Christoph Hellwig | db5ed4d | 2014-11-13 15:08:42 +0100 | [diff] [blame] | 966 | retval = sht->change_queue_depth(sdev, depth); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | if (retval < 0) |
| 968 | return retval; |
| 969 | |
Vasu Dev | 4a84067 | 2009-10-22 15:46:33 -0700 | [diff] [blame] | 970 | sdev->max_queue_depth = sdev->queue_depth; |
| 971 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | return count; |
| 973 | } |
Hannes Reinecke | 276b20d | 2014-03-15 09:51:47 +0100 | [diff] [blame] | 974 | sdev_show_function(queue_depth, "%d\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | |
Hannes Reinecke | 276b20d | 2014-03-15 09:51:47 +0100 | [diff] [blame] | 976 | static DEVICE_ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, |
| 977 | sdev_store_queue_depth); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | |
Hannes Reinecke | 248d4fe | 2015-12-01 10:16:56 +0100 | [diff] [blame] | 979 | static ssize_t |
| 980 | sdev_show_wwid(struct device *dev, struct device_attribute *attr, |
| 981 | char *buf) |
| 982 | { |
| 983 | struct scsi_device *sdev = to_scsi_device(dev); |
| 984 | ssize_t count; |
| 985 | |
| 986 | count = scsi_vpd_lun_id(sdev, buf, PAGE_SIZE); |
| 987 | if (count > 0) { |
| 988 | buf[count] = '\n'; |
| 989 | count++; |
| 990 | } |
| 991 | return count; |
| 992 | } |
| 993 | static DEVICE_ATTR(wwid, S_IRUGO, sdev_show_wwid, NULL); |
| 994 | |
Bart Van Assche | 093b888 | 2017-12-12 10:23:28 -0800 | [diff] [blame] | 995 | #define BLIST_FLAG_NAME(name) \ |
Martin Wilck | 1409880 | 2018-04-18 01:35:08 +0200 | [diff] [blame] | 996 | [const_ilog2((__force __u64)BLIST_##name)] = #name |
Hannes Reinecke | 345e296 | 2017-10-02 16:26:34 +0200 | [diff] [blame] | 997 | static const char *const sdev_bflags_name[] = { |
| 998 | #include "scsi_devinfo_tbl.c" |
| 999 | }; |
| 1000 | #undef BLIST_FLAG_NAME |
| 1001 | |
| 1002 | static ssize_t |
| 1003 | sdev_show_blacklist(struct device *dev, struct device_attribute *attr, |
| 1004 | char *buf) |
| 1005 | { |
| 1006 | struct scsi_device *sdev = to_scsi_device(dev); |
| 1007 | int i; |
| 1008 | ssize_t len = 0; |
| 1009 | |
| 1010 | for (i = 0; i < sizeof(sdev->sdev_bflags) * BITS_PER_BYTE; i++) { |
| 1011 | const char *name = NULL; |
| 1012 | |
Bart Van Assche | 093b888 | 2017-12-12 10:23:28 -0800 | [diff] [blame] | 1013 | if (!(sdev->sdev_bflags & (__force blist_flags_t)BIT(i))) |
Hannes Reinecke | 345e296 | 2017-10-02 16:26:34 +0200 | [diff] [blame] | 1014 | continue; |
| 1015 | if (i < ARRAY_SIZE(sdev_bflags_name) && sdev_bflags_name[i]) |
| 1016 | name = sdev_bflags_name[i]; |
| 1017 | |
| 1018 | if (name) |
| 1019 | len += snprintf(buf + len, PAGE_SIZE - len, |
| 1020 | "%s%s", len ? " " : "", name); |
| 1021 | else |
| 1022 | len += snprintf(buf + len, PAGE_SIZE - len, |
| 1023 | "%sINVALID_BIT(%d)", len ? " " : "", i); |
| 1024 | } |
| 1025 | if (len) |
| 1026 | len += snprintf(buf + len, PAGE_SIZE - len, "\n"); |
| 1027 | return len; |
| 1028 | } |
| 1029 | static DEVICE_ATTR(blacklist, S_IRUGO, sdev_show_blacklist, NULL); |
| 1030 | |
Hannes Reinecke | 41f95dd | 2015-12-01 10:16:41 +0100 | [diff] [blame] | 1031 | #ifdef CONFIG_SCSI_DH |
| 1032 | static ssize_t |
| 1033 | sdev_show_dh_state(struct device *dev, struct device_attribute *attr, |
| 1034 | char *buf) |
| 1035 | { |
| 1036 | struct scsi_device *sdev = to_scsi_device(dev); |
| 1037 | |
| 1038 | if (!sdev->handler) |
| 1039 | return snprintf(buf, 20, "detached\n"); |
| 1040 | |
| 1041 | return snprintf(buf, 20, "%s\n", sdev->handler->name); |
| 1042 | } |
| 1043 | |
| 1044 | static ssize_t |
| 1045 | sdev_store_dh_state(struct device *dev, struct device_attribute *attr, |
| 1046 | const char *buf, size_t count) |
| 1047 | { |
| 1048 | struct scsi_device *sdev = to_scsi_device(dev); |
| 1049 | int err = -EINVAL; |
| 1050 | |
| 1051 | if (sdev->sdev_state == SDEV_CANCEL || |
| 1052 | sdev->sdev_state == SDEV_DEL) |
| 1053 | return -ENODEV; |
| 1054 | |
| 1055 | if (!sdev->handler) { |
| 1056 | /* |
| 1057 | * Attach to a device handler |
| 1058 | */ |
| 1059 | err = scsi_dh_attach(sdev->request_queue, buf); |
| 1060 | } else if (!strncmp(buf, "activate", 8)) { |
| 1061 | /* |
| 1062 | * Activate a device handler |
| 1063 | */ |
| 1064 | if (sdev->handler->activate) |
| 1065 | err = sdev->handler->activate(sdev, NULL, NULL); |
| 1066 | else |
| 1067 | err = 0; |
| 1068 | } else if (!strncmp(buf, "detach", 6)) { |
| 1069 | /* |
| 1070 | * Detach from a device handler |
| 1071 | */ |
| 1072 | sdev_printk(KERN_WARNING, sdev, |
| 1073 | "can't detach handler %s.\n", |
| 1074 | sdev->handler->name); |
| 1075 | err = -EINVAL; |
| 1076 | } |
| 1077 | |
| 1078 | return err < 0 ? err : count; |
| 1079 | } |
| 1080 | |
| 1081 | static DEVICE_ATTR(dh_state, S_IRUGO | S_IWUSR, sdev_show_dh_state, |
| 1082 | sdev_store_dh_state); |
Hannes Reinecke | 77c9df9 | 2016-03-03 07:54:07 +0100 | [diff] [blame] | 1083 | |
| 1084 | static ssize_t |
| 1085 | sdev_show_access_state(struct device *dev, |
| 1086 | struct device_attribute *attr, |
| 1087 | char *buf) |
| 1088 | { |
| 1089 | struct scsi_device *sdev = to_scsi_device(dev); |
| 1090 | unsigned char access_state; |
| 1091 | const char *access_state_name; |
| 1092 | |
| 1093 | if (!sdev->handler) |
| 1094 | return -EINVAL; |
| 1095 | |
| 1096 | access_state = (sdev->access_state & SCSI_ACCESS_STATE_MASK); |
| 1097 | access_state_name = scsi_access_state_name(access_state); |
| 1098 | |
| 1099 | return sprintf(buf, "%s\n", |
| 1100 | access_state_name ? access_state_name : "unknown"); |
| 1101 | } |
| 1102 | static DEVICE_ATTR(access_state, S_IRUGO, sdev_show_access_state, NULL); |
| 1103 | |
| 1104 | static ssize_t |
| 1105 | sdev_show_preferred_path(struct device *dev, |
| 1106 | struct device_attribute *attr, |
| 1107 | char *buf) |
| 1108 | { |
| 1109 | struct scsi_device *sdev = to_scsi_device(dev); |
| 1110 | |
| 1111 | if (!sdev->handler) |
| 1112 | return -EINVAL; |
| 1113 | |
| 1114 | if (sdev->access_state & SCSI_ACCESS_STATE_PREFERRED) |
| 1115 | return sprintf(buf, "1\n"); |
| 1116 | else |
| 1117 | return sprintf(buf, "0\n"); |
| 1118 | } |
| 1119 | static DEVICE_ATTR(preferred_path, S_IRUGO, sdev_show_preferred_path, NULL); |
Hannes Reinecke | 41f95dd | 2015-12-01 10:16:41 +0100 | [diff] [blame] | 1120 | #endif |
| 1121 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1122 | static ssize_t |
Vasu Dev | 4a84067 | 2009-10-22 15:46:33 -0700 | [diff] [blame] | 1123 | sdev_show_queue_ramp_up_period(struct device *dev, |
| 1124 | struct device_attribute *attr, |
| 1125 | char *buf) |
| 1126 | { |
| 1127 | struct scsi_device *sdev; |
| 1128 | sdev = to_scsi_device(dev); |
| 1129 | return snprintf(buf, 20, "%u\n", |
| 1130 | jiffies_to_msecs(sdev->queue_ramp_up_period)); |
| 1131 | } |
| 1132 | |
| 1133 | static ssize_t |
| 1134 | sdev_store_queue_ramp_up_period(struct device *dev, |
| 1135 | struct device_attribute *attr, |
| 1136 | const char *buf, size_t count) |
| 1137 | { |
| 1138 | struct scsi_device *sdev = to_scsi_device(dev); |
Daniel Walter | f7c65af | 2014-08-08 14:24:05 -0700 | [diff] [blame] | 1139 | unsigned int period; |
Vasu Dev | 4a84067 | 2009-10-22 15:46:33 -0700 | [diff] [blame] | 1140 | |
Daniel Walter | f7c65af | 2014-08-08 14:24:05 -0700 | [diff] [blame] | 1141 | if (kstrtouint(buf, 10, &period)) |
Vasu Dev | 4a84067 | 2009-10-22 15:46:33 -0700 | [diff] [blame] | 1142 | return -EINVAL; |
| 1143 | |
| 1144 | sdev->queue_ramp_up_period = msecs_to_jiffies(period); |
Peter Oberparleiter | 5cb9b40 | 2015-10-26 15:54:23 +0100 | [diff] [blame] | 1145 | return count; |
Vasu Dev | 4a84067 | 2009-10-22 15:46:33 -0700 | [diff] [blame] | 1146 | } |
| 1147 | |
Hannes Reinecke | 276b20d | 2014-03-15 09:51:47 +0100 | [diff] [blame] | 1148 | static DEVICE_ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR, |
| 1149 | sdev_show_queue_ramp_up_period, |
| 1150 | sdev_store_queue_ramp_up_period); |
Vasu Dev | 4a84067 | 2009-10-22 15:46:33 -0700 | [diff] [blame] | 1151 | |
Hannes Reinecke | 276b20d | 2014-03-15 09:51:47 +0100 | [diff] [blame] | 1152 | static umode_t scsi_sdev_attr_is_visible(struct kobject *kobj, |
| 1153 | struct attribute *attr, int i) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1154 | { |
Hannes Reinecke | 276b20d | 2014-03-15 09:51:47 +0100 | [diff] [blame] | 1155 | struct device *dev = container_of(kobj, struct device, kobj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | struct scsi_device *sdev = to_scsi_device(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1157 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | |
Hannes Reinecke | 276b20d | 2014-03-15 09:51:47 +0100 | [diff] [blame] | 1159 | if (attr == &dev_attr_queue_depth.attr && |
| 1160 | !sdev->host->hostt->change_queue_depth) |
| 1161 | return S_IRUGO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | |
Hannes Reinecke | 276b20d | 2014-03-15 09:51:47 +0100 | [diff] [blame] | 1163 | if (attr == &dev_attr_queue_ramp_up_period.attr && |
| 1164 | !sdev->host->hostt->change_queue_depth) |
| 1165 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1166 | |
Hannes Reinecke | 77c9df9 | 2016-03-03 07:54:07 +0100 | [diff] [blame] | 1167 | #ifdef CONFIG_SCSI_DH |
| 1168 | if (attr == &dev_attr_access_state.attr && |
| 1169 | !sdev->handler) |
| 1170 | return 0; |
| 1171 | if (attr == &dev_attr_preferred_path.attr && |
| 1172 | !sdev->handler) |
| 1173 | return 0; |
| 1174 | #endif |
Hannes Reinecke | 276b20d | 2014-03-15 09:51:47 +0100 | [diff] [blame] | 1175 | return attr->mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1176 | } |
| 1177 | |
Hannes Reinecke | 7e47976 | 2016-03-03 07:41:24 +0100 | [diff] [blame] | 1178 | static umode_t scsi_sdev_bin_attr_is_visible(struct kobject *kobj, |
| 1179 | struct bin_attribute *attr, int i) |
| 1180 | { |
| 1181 | struct device *dev = container_of(kobj, struct device, kobj); |
| 1182 | struct scsi_device *sdev = to_scsi_device(dev); |
| 1183 | |
| 1184 | |
| 1185 | if (attr == &dev_attr_vpd_pg80 && !sdev->vpd_pg80) |
| 1186 | return 0; |
| 1187 | |
Hannes Reinecke | 6888758 | 2016-03-10 11:25:26 +0100 | [diff] [blame] | 1188 | if (attr == &dev_attr_vpd_pg83 && !sdev->vpd_pg83) |
Hannes Reinecke | 7e47976 | 2016-03-03 07:41:24 +0100 | [diff] [blame] | 1189 | return 0; |
| 1190 | |
| 1191 | return S_IRUGO; |
| 1192 | } |
| 1193 | |
Hannes Reinecke | 276b20d | 2014-03-15 09:51:47 +0100 | [diff] [blame] | 1194 | /* Default template for device attributes. May NOT be modified */ |
| 1195 | static struct attribute *scsi_sdev_attrs[] = { |
| 1196 | &dev_attr_device_blocked.attr, |
| 1197 | &dev_attr_type.attr, |
| 1198 | &dev_attr_scsi_level.attr, |
| 1199 | &dev_attr_device_busy.attr, |
| 1200 | &dev_attr_vendor.attr, |
| 1201 | &dev_attr_model.attr, |
| 1202 | &dev_attr_rev.attr, |
| 1203 | &dev_attr_rescan.attr, |
| 1204 | &dev_attr_delete.attr, |
| 1205 | &dev_attr_state.attr, |
| 1206 | &dev_attr_timeout.attr, |
| 1207 | &dev_attr_eh_timeout.attr, |
| 1208 | &dev_attr_iocounterbits.attr, |
| 1209 | &dev_attr_iorequest_cnt.attr, |
| 1210 | &dev_attr_iodone_cnt.attr, |
| 1211 | &dev_attr_ioerr_cnt.attr, |
| 1212 | &dev_attr_modalias.attr, |
| 1213 | &dev_attr_queue_depth.attr, |
| 1214 | &dev_attr_queue_type.attr, |
Hannes Reinecke | 248d4fe | 2015-12-01 10:16:56 +0100 | [diff] [blame] | 1215 | &dev_attr_wwid.attr, |
Hannes Reinecke | 345e296 | 2017-10-02 16:26:34 +0200 | [diff] [blame] | 1216 | &dev_attr_blacklist.attr, |
Hannes Reinecke | 41f95dd | 2015-12-01 10:16:41 +0100 | [diff] [blame] | 1217 | #ifdef CONFIG_SCSI_DH |
| 1218 | &dev_attr_dh_state.attr, |
Hannes Reinecke | 77c9df9 | 2016-03-03 07:54:07 +0100 | [diff] [blame] | 1219 | &dev_attr_access_state.attr, |
| 1220 | &dev_attr_preferred_path.attr, |
Hannes Reinecke | 41f95dd | 2015-12-01 10:16:41 +0100 | [diff] [blame] | 1221 | #endif |
Hannes Reinecke | 276b20d | 2014-03-15 09:51:47 +0100 | [diff] [blame] | 1222 | &dev_attr_queue_ramp_up_period.attr, |
| 1223 | REF_EVT(media_change), |
| 1224 | REF_EVT(inquiry_change_reported), |
| 1225 | REF_EVT(capacity_change_reported), |
| 1226 | REF_EVT(soft_threshold_reached), |
| 1227 | REF_EVT(mode_parameter_change_reported), |
| 1228 | REF_EVT(lun_change_reported), |
| 1229 | NULL |
| 1230 | }; |
| 1231 | |
Hannes Reinecke | b3ae878 | 2014-03-15 09:51:49 +0100 | [diff] [blame] | 1232 | static struct bin_attribute *scsi_sdev_bin_attrs[] = { |
| 1233 | &dev_attr_vpd_pg83, |
| 1234 | &dev_attr_vpd_pg80, |
Johannes Thumshirn | 92e6246 | 2015-11-09 10:56:57 +0100 | [diff] [blame] | 1235 | &dev_attr_inquiry, |
Hannes Reinecke | b3ae878 | 2014-03-15 09:51:49 +0100 | [diff] [blame] | 1236 | NULL |
| 1237 | }; |
Hannes Reinecke | 276b20d | 2014-03-15 09:51:47 +0100 | [diff] [blame] | 1238 | static struct attribute_group scsi_sdev_attr_group = { |
| 1239 | .attrs = scsi_sdev_attrs, |
Hannes Reinecke | b3ae878 | 2014-03-15 09:51:49 +0100 | [diff] [blame] | 1240 | .bin_attrs = scsi_sdev_bin_attrs, |
Hannes Reinecke | 276b20d | 2014-03-15 09:51:47 +0100 | [diff] [blame] | 1241 | .is_visible = scsi_sdev_attr_is_visible, |
Hannes Reinecke | 7e47976 | 2016-03-03 07:41:24 +0100 | [diff] [blame] | 1242 | .is_bin_visible = scsi_sdev_bin_attr_is_visible, |
Hannes Reinecke | 276b20d | 2014-03-15 09:51:47 +0100 | [diff] [blame] | 1243 | }; |
| 1244 | |
| 1245 | static const struct attribute_group *scsi_sdev_attr_groups[] = { |
| 1246 | &scsi_sdev_attr_group, |
| 1247 | NULL |
| 1248 | }; |
| 1249 | |
James Bottomley | 643eb2d | 2008-03-22 22:42:27 -0500 | [diff] [blame] | 1250 | static int scsi_target_add(struct scsi_target *starget) |
| 1251 | { |
| 1252 | int error; |
| 1253 | |
| 1254 | if (starget->state != STARGET_CREATED) |
| 1255 | return 0; |
| 1256 | |
| 1257 | error = device_add(&starget->dev); |
| 1258 | if (error) { |
| 1259 | dev_err(&starget->dev, "target device_add failed, error %d\n", error); |
James Bottomley | 643eb2d | 2008-03-22 22:42:27 -0500 | [diff] [blame] | 1260 | return error; |
| 1261 | } |
| 1262 | transport_add_device(&starget->dev); |
| 1263 | starget->state = STARGET_RUNNING; |
| 1264 | |
Alan Stern | bc4f240 | 2010-06-17 10:41:42 -0400 | [diff] [blame] | 1265 | pm_runtime_set_active(&starget->dev); |
| 1266 | pm_runtime_enable(&starget->dev); |
| 1267 | device_enable_async_suspend(&starget->dev); |
| 1268 | |
James Bottomley | 643eb2d | 2008-03-22 22:42:27 -0500 | [diff] [blame] | 1269 | return 0; |
| 1270 | } |
| 1271 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1272 | /** |
| 1273 | * scsi_sysfs_add_sdev - add scsi device to sysfs |
| 1274 | * @sdev: scsi_device to add |
| 1275 | * |
| 1276 | * Return value: |
| 1277 | * 0 on Success / non-zero on Failure |
| 1278 | **/ |
| 1279 | int scsi_sysfs_add_sdev(struct scsi_device *sdev) |
| 1280 | { |
| 1281 | int error, i; |
James Bottomley | 80ed71c | 2007-07-19 10:15:10 -0500 | [diff] [blame] | 1282 | struct request_queue *rq = sdev->request_queue; |
James Bottomley | 643eb2d | 2008-03-22 22:42:27 -0500 | [diff] [blame] | 1283 | struct scsi_target *starget = sdev->sdev_target; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | |
James Bottomley | 643eb2d | 2008-03-22 22:42:27 -0500 | [diff] [blame] | 1285 | error = scsi_target_add(starget); |
| 1286 | if (error) |
| 1287 | return error; |
| 1288 | |
| 1289 | transport_configure_device(&starget->dev); |
Alan Stern | bc4f240 | 2010-06-17 10:41:42 -0400 | [diff] [blame] | 1290 | |
Rafael J. Wysocki | 4cb077d | 2010-02-08 19:18:26 +0100 | [diff] [blame] | 1291 | device_enable_async_suspend(&sdev->sdev_gendev); |
Alan Stern | bc4f240 | 2010-06-17 10:41:42 -0400 | [diff] [blame] | 1292 | scsi_autopm_get_target(starget); |
| 1293 | pm_runtime_set_active(&sdev->sdev_gendev); |
| 1294 | pm_runtime_forbid(&sdev->sdev_gendev); |
| 1295 | pm_runtime_enable(&sdev->sdev_gendev); |
| 1296 | scsi_autopm_put_target(starget); |
| 1297 | |
Alan Stern | bc4f240 | 2010-06-17 10:41:42 -0400 | [diff] [blame] | 1298 | scsi_autopm_get_device(sdev); |
| 1299 | |
Hannes Reinecke | 2930f81 | 2017-09-20 09:18:52 +0200 | [diff] [blame] | 1300 | scsi_dh_add_device(sdev); |
Christoph Hellwig | 086b91d | 2015-08-27 14:16:57 +0200 | [diff] [blame] | 1301 | |
Hannes Reinecke | 4cd2459 | 2016-03-03 07:54:12 +0100 | [diff] [blame] | 1302 | error = device_add(&sdev->sdev_gendev); |
| 1303 | if (error) { |
| 1304 | sdev_printk(KERN_INFO, sdev, |
| 1305 | "failed to add device: %d\n", error); |
Hannes Reinecke | 4cd2459 | 2016-03-03 07:54:12 +0100 | [diff] [blame] | 1306 | return error; |
| 1307 | } |
| 1308 | |
Rafael J. Wysocki | 4cb077d | 2010-02-08 19:18:26 +0100 | [diff] [blame] | 1309 | device_enable_async_suspend(&sdev->sdev_dev); |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1310 | error = device_add(&sdev->sdev_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1311 | if (error) { |
Alan Stern | 73d8c34 | 2010-11-15 16:03:04 -0500 | [diff] [blame] | 1312 | sdev_printk(KERN_INFO, sdev, |
| 1313 | "failed to add class device: %d\n", error); |
James Bottomley | 860dc73 | 2009-11-19 17:48:29 -0500 | [diff] [blame] | 1314 | device_del(&sdev->sdev_gendev); |
Alan Stern | ee37e09 | 2010-02-12 12:13:55 -0500 | [diff] [blame] | 1315 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | } |
James Bottomley | 860dc73 | 2009-11-19 17:48:29 -0500 | [diff] [blame] | 1317 | transport_add_device(&sdev->sdev_gendev); |
| 1318 | sdev->is_visible = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1319 | |
Christoph Hellwig | 17cb960 | 2018-03-13 17:28:41 +0100 | [diff] [blame] | 1320 | error = bsg_scsi_register_queue(rq, &sdev->sdev_gendev); |
James Bottomley | 80ed71c | 2007-07-19 10:15:10 -0500 | [diff] [blame] | 1321 | if (error) |
James Bottomley | 860dc73 | 2009-11-19 17:48:29 -0500 | [diff] [blame] | 1322 | /* we're treating error on bsg register as non-fatal, |
| 1323 | * so pretend nothing went wrong */ |
James Bottomley | 80ed71c | 2007-07-19 10:15:10 -0500 | [diff] [blame] | 1324 | sdev_printk(KERN_INFO, sdev, |
| 1325 | "Failed to register bsg queue, errno=%d\n", error); |
| 1326 | |
Kay Sievers | bfd1294 | 2007-09-11 17:00:14 +0200 | [diff] [blame] | 1327 | /* add additional host specific attributes */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1328 | if (sdev->host->hostt->sdev_attrs) { |
| 1329 | for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) { |
Kay Sievers | bfd1294 | 2007-09-11 17:00:14 +0200 | [diff] [blame] | 1330 | error = device_create_file(&sdev->sdev_gendev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | sdev->host->hostt->sdev_attrs[i]); |
James Bottomley | 860dc73 | 2009-11-19 17:48:29 -0500 | [diff] [blame] | 1332 | if (error) |
Alan Stern | ee37e09 | 2010-02-12 12:13:55 -0500 | [diff] [blame] | 1333 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1334 | } |
| 1335 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1336 | |
Stanislav Nijnikov | 86b87cd | 2018-02-15 14:14:08 +0200 | [diff] [blame] | 1337 | if (sdev->host->hostt->sdev_groups) { |
| 1338 | error = sysfs_create_groups(&sdev->sdev_gendev.kobj, |
| 1339 | sdev->host->hostt->sdev_groups); |
| 1340 | if (error) |
| 1341 | return error; |
| 1342 | } |
| 1343 | |
Subhash Jadavani | 6fe8c1d | 2014-09-10 14:54:09 +0300 | [diff] [blame] | 1344 | scsi_autopm_put_device(sdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1345 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1346 | } |
| 1347 | |
Alan Stern | 903f4fe | 2005-07-26 10:20:53 -0400 | [diff] [blame] | 1348 | void __scsi_remove_device(struct scsi_device *sdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1349 | { |
James Bottomley | df133c2 | 2005-11-06 11:47:08 -0600 | [diff] [blame] | 1350 | struct device *dev = &sdev->sdev_gendev; |
Bart Van Assche | 0db6ca8 | 2017-06-02 14:21:55 -0700 | [diff] [blame] | 1351 | int res; |
James Bottomley | df133c2 | 2005-11-06 11:47:08 -0600 | [diff] [blame] | 1352 | |
Vitaly Kuznetsov | be821fd | 2015-11-19 14:02:19 +0100 | [diff] [blame] | 1353 | /* |
| 1354 | * This cleanup path is not reentrant and while it is impossible |
| 1355 | * to get a new reference with scsi_device_get() someone can still |
| 1356 | * hold a previously acquired one. |
| 1357 | */ |
| 1358 | if (sdev->sdev_state == SDEV_DEL) |
| 1359 | return; |
| 1360 | |
James Bottomley | 860dc73 | 2009-11-19 17:48:29 -0500 | [diff] [blame] | 1361 | if (sdev->is_visible) { |
Bart Van Assche | 0db6ca8 | 2017-06-02 14:21:55 -0700 | [diff] [blame] | 1362 | /* |
| 1363 | * If scsi_internal_target_block() is running concurrently, |
| 1364 | * wait until it has finished before changing the device state. |
| 1365 | */ |
| 1366 | mutex_lock(&sdev->state_mutex); |
Bart Van Assche | 255ee93 | 2017-06-02 14:21:57 -0700 | [diff] [blame] | 1367 | /* |
| 1368 | * If blocked, we go straight to DEL and restart the queue so |
| 1369 | * any commands issued during driver shutdown (like sync |
| 1370 | * cache) are errored immediately. |
| 1371 | */ |
Bart Van Assche | 0db6ca8 | 2017-06-02 14:21:55 -0700 | [diff] [blame] | 1372 | res = scsi_device_set_state(sdev, SDEV_CANCEL); |
Bart Van Assche | 255ee93 | 2017-06-02 14:21:57 -0700 | [diff] [blame] | 1373 | if (res != 0) { |
| 1374 | res = scsi_device_set_state(sdev, SDEV_DEL); |
| 1375 | if (res == 0) |
| 1376 | scsi_start_queue(sdev); |
| 1377 | } |
Bart Van Assche | 0db6ca8 | 2017-06-02 14:21:55 -0700 | [diff] [blame] | 1378 | mutex_unlock(&sdev->state_mutex); |
| 1379 | |
| 1380 | if (res != 0) |
James Bottomley | 860dc73 | 2009-11-19 17:48:29 -0500 | [diff] [blame] | 1381 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1382 | |
Stanislav Nijnikov | 86b87cd | 2018-02-15 14:14:08 +0200 | [diff] [blame] | 1383 | if (sdev->host->hostt->sdev_groups) |
| 1384 | sysfs_remove_groups(&sdev->sdev_gendev.kobj, |
| 1385 | sdev->host->hostt->sdev_groups); |
| 1386 | |
James Bottomley | 860dc73 | 2009-11-19 17:48:29 -0500 | [diff] [blame] | 1387 | bsg_unregister_queue(sdev->request_queue); |
| 1388 | device_unregister(&sdev->sdev_dev); |
| 1389 | transport_remove_device(dev); |
Bart Van Assche | e619e6c | 2015-11-20 14:11:01 -0800 | [diff] [blame] | 1390 | device_del(dev); |
| 1391 | } else |
| 1392 | put_device(&sdev->sdev_dev); |
Bart Van Assche | b485462 | 2012-06-29 15:36:07 +0000 | [diff] [blame] | 1393 | |
| 1394 | /* |
| 1395 | * Stop accepting new requests and wait until all queuecommand() and |
| 1396 | * scsi_run_queue() invocations have finished before tearing down the |
| 1397 | * device. |
| 1398 | */ |
Bart Van Assche | 0db6ca8 | 2017-06-02 14:21:55 -0700 | [diff] [blame] | 1399 | mutex_lock(&sdev->state_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | scsi_device_set_state(sdev, SDEV_DEL); |
Bart Van Assche | 0db6ca8 | 2017-06-02 14:21:55 -0700 | [diff] [blame] | 1401 | mutex_unlock(&sdev->state_mutex); |
| 1402 | |
Bart Van Assche | b485462 | 2012-06-29 15:36:07 +0000 | [diff] [blame] | 1403 | blk_cleanup_queue(sdev->request_queue); |
| 1404 | cancel_work_sync(&sdev->requeue_work); |
| 1405 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1406 | if (sdev->host->hostt->slave_destroy) |
| 1407 | sdev->host->hostt->slave_destroy(sdev); |
James Bottomley | df133c2 | 2005-11-06 11:47:08 -0600 | [diff] [blame] | 1408 | transport_destroy_device(dev); |
James Bottomley | 86cbfb5 | 2011-04-22 10:39:59 -0500 | [diff] [blame] | 1409 | |
James Bottomley | e63ed0d | 2014-01-21 07:00:50 -0800 | [diff] [blame] | 1410 | /* |
| 1411 | * Paired with the kref_get() in scsi_sysfs_initialize(). We have |
| 1412 | * remoed sysfs visibility from the device, so make the target |
| 1413 | * invisible if this was the last device underneath it. |
| 1414 | */ |
| 1415 | scsi_target_reap(scsi_target(sdev)); |
| 1416 | |
James Bottomley | df133c2 | 2005-11-06 11:47:08 -0600 | [diff] [blame] | 1417 | put_device(dev); |
Alan Stern | 903f4fe | 2005-07-26 10:20:53 -0400 | [diff] [blame] | 1418 | } |
| 1419 | |
| 1420 | /** |
| 1421 | * scsi_remove_device - unregister a device from the scsi bus |
| 1422 | * @sdev: scsi_device to unregister |
| 1423 | **/ |
| 1424 | void scsi_remove_device(struct scsi_device *sdev) |
| 1425 | { |
Alan Stern | 5419500 | 2005-09-15 21:52:51 -0400 | [diff] [blame] | 1426 | struct Scsi_Host *shost = sdev->host; |
| 1427 | |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 1428 | mutex_lock(&shost->scan_mutex); |
Alan Stern | 903f4fe | 2005-07-26 10:20:53 -0400 | [diff] [blame] | 1429 | __scsi_remove_device(sdev); |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 1430 | mutex_unlock(&shost->scan_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1431 | } |
| 1432 | EXPORT_SYMBOL(scsi_remove_device); |
| 1433 | |
Adrian Bunk | 44818ef | 2007-07-09 11:59:59 -0700 | [diff] [blame] | 1434 | static void __scsi_remove_target(struct scsi_target *starget) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | { |
| 1436 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 1437 | unsigned long flags; |
Alan Stern | a64358d | 2005-07-26 10:27:10 -0400 | [diff] [blame] | 1438 | struct scsi_device *sdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1439 | |
| 1440 | spin_lock_irqsave(shost->host_lock, flags); |
Alan Stern | a64358d | 2005-07-26 10:27:10 -0400 | [diff] [blame] | 1441 | restart: |
| 1442 | list_for_each_entry(sdev, &shost->__devices, siblings) { |
Hannes Reinecke | fbce4d9 | 2017-10-04 10:28:56 +0200 | [diff] [blame] | 1443 | /* |
| 1444 | * We cannot call scsi_device_get() here, as |
| 1445 | * we might've been called from rmmod() causing |
| 1446 | * scsi_device_get() to fail the module_is_live() |
| 1447 | * check. |
| 1448 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1449 | if (sdev->channel != starget->channel || |
Hannes Reinecke | 81b6c99 | 2017-12-13 14:21:37 +0100 | [diff] [blame] | 1450 | sdev->id != starget->id) |
| 1451 | continue; |
| 1452 | if (sdev->sdev_state == SDEV_DEL || |
| 1453 | sdev->sdev_state == SDEV_CANCEL || |
Hannes Reinecke | fbce4d9 | 2017-10-04 10:28:56 +0200 | [diff] [blame] | 1454 | !get_device(&sdev->sdev_gendev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1455 | continue; |
| 1456 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 1457 | scsi_remove_device(sdev); |
Hannes Reinecke | fbce4d9 | 2017-10-04 10:28:56 +0200 | [diff] [blame] | 1458 | put_device(&sdev->sdev_gendev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1459 | spin_lock_irqsave(shost->host_lock, flags); |
Alan Stern | a64358d | 2005-07-26 10:27:10 -0400 | [diff] [blame] | 1460 | goto restart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1461 | } |
| 1462 | spin_unlock_irqrestore(shost->host_lock, flags); |
mochel@digitalimplant.org | 20b1e67 | 2005-03-24 19:03:59 -0800 | [diff] [blame] | 1463 | } |
| 1464 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1465 | /** |
| 1466 | * scsi_remove_target - try to remove a target and all its devices |
| 1467 | * @dev: generic starget or parent of generic stargets to be removed |
| 1468 | * |
| 1469 | * Note: This is slightly racy. It is possible that if the user |
| 1470 | * requests the addition of another device then the target won't be |
| 1471 | * removed. |
| 1472 | */ |
| 1473 | void scsi_remove_target(struct device *dev) |
| 1474 | { |
Dan Williams | 3b661a9 | 2012-06-21 23:47:28 -0700 | [diff] [blame] | 1475 | struct Scsi_Host *shost = dev_to_shost(dev->parent); |
Johannes Thumshirn | 305c2e7 | 2016-04-05 11:50:45 +0200 | [diff] [blame] | 1476 | struct scsi_target *starget; |
Dan Williams | 3b661a9 | 2012-06-21 23:47:28 -0700 | [diff] [blame] | 1477 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1478 | |
Christoph Hellwig | 4099819 | 2015-10-19 16:35:46 +0200 | [diff] [blame] | 1479 | restart: |
Dan Williams | 3b661a9 | 2012-06-21 23:47:28 -0700 | [diff] [blame] | 1480 | spin_lock_irqsave(shost->host_lock, flags); |
| 1481 | list_for_each_entry(starget, &shost->__targets, siblings) { |
James Bottomley | 90a88d6 | 2016-02-10 08:03:26 -0800 | [diff] [blame] | 1482 | if (starget->state == STARGET_DEL || |
Ewan D. Milne | f9279c9 | 2017-06-27 14:55:58 -0400 | [diff] [blame] | 1483 | starget->state == STARGET_REMOVE || |
| 1484 | starget->state == STARGET_CREATED_REMOVE) |
Dan Williams | 3b661a9 | 2012-06-21 23:47:28 -0700 | [diff] [blame] | 1485 | continue; |
| 1486 | if (starget->dev.parent == dev || &starget->dev == dev) { |
James Bottomley | e63ed0d | 2014-01-21 07:00:50 -0800 | [diff] [blame] | 1487 | kref_get(&starget->reap_ref); |
Ewan D. Milne | f9279c9 | 2017-06-27 14:55:58 -0400 | [diff] [blame] | 1488 | if (starget->state == STARGET_CREATED) |
| 1489 | starget->state = STARGET_CREATED_REMOVE; |
| 1490 | else |
| 1491 | starget->state = STARGET_REMOVE; |
Dan Williams | bc3f02a | 2012-08-28 22:12:10 -0700 | [diff] [blame] | 1492 | spin_unlock_irqrestore(shost->host_lock, flags); |
Dan Williams | bc3f02a | 2012-08-28 22:12:10 -0700 | [diff] [blame] | 1493 | __scsi_remove_target(starget); |
Christoph Hellwig | 4099819 | 2015-10-19 16:35:46 +0200 | [diff] [blame] | 1494 | scsi_target_reap(starget); |
| 1495 | goto restart; |
Dan Williams | 3b661a9 | 2012-06-21 23:47:28 -0700 | [diff] [blame] | 1496 | } |
| 1497 | } |
| 1498 | spin_unlock_irqrestore(shost->host_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1499 | } |
| 1500 | EXPORT_SYMBOL(scsi_remove_target); |
| 1501 | |
| 1502 | int scsi_register_driver(struct device_driver *drv) |
| 1503 | { |
| 1504 | drv->bus = &scsi_bus_type; |
| 1505 | |
| 1506 | return driver_register(drv); |
| 1507 | } |
| 1508 | EXPORT_SYMBOL(scsi_register_driver); |
| 1509 | |
| 1510 | int scsi_register_interface(struct class_interface *intf) |
| 1511 | { |
| 1512 | intf->class = &sdev_class; |
| 1513 | |
| 1514 | return class_interface_register(intf); |
| 1515 | } |
| 1516 | EXPORT_SYMBOL(scsi_register_interface); |
| 1517 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1518 | /** |
| 1519 | * scsi_sysfs_add_host - add scsi host to subsystem |
| 1520 | * @shost: scsi host struct to add to subsystem |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1521 | **/ |
| 1522 | int scsi_sysfs_add_host(struct Scsi_Host *shost) |
| 1523 | { |
| 1524 | int error, i; |
| 1525 | |
Hannes Reinecke | f7120a4 | 2008-03-18 14:32:28 +0100 | [diff] [blame] | 1526 | /* add host specific attributes */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1527 | if (shost->hostt->shost_attrs) { |
| 1528 | for (i = 0; shost->hostt->shost_attrs[i]; i++) { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1529 | error = device_create_file(&shost->shost_dev, |
Hannes Reinecke | f7120a4 | 2008-03-18 14:32:28 +0100 | [diff] [blame] | 1530 | shost->hostt->shost_attrs[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1531 | if (error) |
| 1532 | return error; |
| 1533 | } |
| 1534 | } |
| 1535 | |
| 1536 | transport_register_device(&shost->shost_gendev); |
James Bottomley | d52b381 | 2008-01-05 09:38:30 -0600 | [diff] [blame] | 1537 | transport_configure_device(&shost->shost_gendev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1538 | return 0; |
| 1539 | } |
| 1540 | |
Kay Sievers | bfd1294 | 2007-09-11 17:00:14 +0200 | [diff] [blame] | 1541 | static struct device_type scsi_dev_type = { |
| 1542 | .name = "scsi_device", |
| 1543 | .release = scsi_device_dev_release, |
| 1544 | .groups = scsi_sdev_attr_groups, |
| 1545 | }; |
| 1546 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1547 | void scsi_sysfs_device_initialize(struct scsi_device *sdev) |
| 1548 | { |
| 1549 | unsigned long flags; |
| 1550 | struct Scsi_Host *shost = sdev->host; |
| 1551 | struct scsi_target *starget = sdev->sdev_target; |
| 1552 | |
| 1553 | device_initialize(&sdev->sdev_gendev); |
| 1554 | sdev->sdev_gendev.bus = &scsi_bus_type; |
Kay Sievers | bfd1294 | 2007-09-11 17:00:14 +0200 | [diff] [blame] | 1555 | sdev->sdev_gendev.type = &scsi_dev_type; |
Hannes Reinecke | 9cb78c1 | 2014-06-25 15:27:36 +0200 | [diff] [blame] | 1556 | dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%llu", |
Kay Sievers | 71610f5 | 2008-12-03 22:41:36 +0100 | [diff] [blame] | 1557 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); |
| 1558 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1559 | device_initialize(&sdev->sdev_dev); |
James Bottomley | 37e6ba0 | 2009-10-02 13:30:08 -0500 | [diff] [blame] | 1560 | sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev); |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1561 | sdev->sdev_dev.class = &sdev_class; |
Hannes Reinecke | 9cb78c1 | 2014-06-25 15:27:36 +0200 | [diff] [blame] | 1562 | dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%llu", |
Kay Sievers | 71610f5 | 2008-12-03 22:41:36 +0100 | [diff] [blame] | 1563 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); |
Alan Stern | 50c4e96 | 2014-09-02 11:35:50 -0400 | [diff] [blame] | 1564 | /* |
| 1565 | * Get a default scsi_level from the target (derived from sibling |
| 1566 | * devices). This is the best we can do for guessing how to set |
| 1567 | * sdev->lun_in_cdb for the initial INQUIRY command. For LUN 0 the |
| 1568 | * setting doesn't matter, because all the bits are zero anyway. |
| 1569 | * But it does matter for higher LUNs. |
| 1570 | */ |
Alan Stern | 7c9d6f1 | 2007-01-08 11:12:32 -0500 | [diff] [blame] | 1571 | sdev->scsi_level = starget->scsi_level; |
Alan Stern | 50c4e96 | 2014-09-02 11:35:50 -0400 | [diff] [blame] | 1572 | if (sdev->scsi_level <= SCSI_2 && |
| 1573 | sdev->scsi_level != SCSI_UNKNOWN && |
| 1574 | !shost->no_scsi2_lun_in_cdb) |
| 1575 | sdev->lun_in_cdb = 1; |
| 1576 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1577 | transport_setup_device(&sdev->sdev_gendev); |
| 1578 | spin_lock_irqsave(shost->host_lock, flags); |
| 1579 | list_add_tail(&sdev->same_target_siblings, &starget->devices); |
| 1580 | list_add_tail(&sdev->siblings, &shost->__devices); |
| 1581 | spin_unlock_irqrestore(shost->host_lock, flags); |
James Bottomley | e63ed0d | 2014-01-21 07:00:50 -0800 | [diff] [blame] | 1582 | /* |
| 1583 | * device can now only be removed via __scsi_remove_device() so hold |
| 1584 | * the target. Target will be held in CREATED state until something |
| 1585 | * beneath it becomes visible (in which case it moves to RUNNING) |
| 1586 | */ |
| 1587 | kref_get(&starget->reap_ref); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1588 | } |
| 1589 | |
| 1590 | int scsi_is_sdev_device(const struct device *dev) |
| 1591 | { |
Kay Sievers | 13ba9bc | 2007-09-26 19:54:49 +0200 | [diff] [blame] | 1592 | return dev->type == &scsi_dev_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1593 | } |
| 1594 | EXPORT_SYMBOL(scsi_is_sdev_device); |
| 1595 | |
| 1596 | /* A blank transport template that is used in drivers that don't |
| 1597 | * yet implement Transport Attributes */ |
| 1598 | struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, }; |