instrumentation/events/lttng-module/writeback.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #undef TRACE_SYSTEM
   3 #define TRACE_SYSTEM writeback
   4
   5 #if !defined(LTTNG_TRACE_WRITEBACK_H) || defined(TRACE_HEADER_MULTI_READ)
   6 #define LTTNG_TRACE_WRITEBACK_H
   7
   8 #include <probes/lttng-tracepoint-event.h>
   9 #include <linux/tracepoint.h>
  10 #include <linux/backing-dev.h>
  11 #include <linux/writeback.h>
  12 #include <lttng-kernel-version.h>
  13
  14 #ifndef _TRACE_WRITEBACK_DEF_
  15 #define _TRACE_WRITEBACK_DEF_
  16
  17 /*
  18  * Use the GPL-exported bdi_dev_name introduced in kernel 5.7. Do not use
  19  * static inline bdi_dev_name in prior kernels because it uses the bdi_unknown_name
  20  * symbol which is not exported to GPL modules.
  21  */
  22 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,7,0))
  23 static inline const char *lttng_bdi_dev_name(struct backing_dev_info *bdi)
  24 {
  25         return bdi_dev_name(bdi);
  26 }
  27 #else
  28 static inline const char *lttng_bdi_dev_name(struct backing_dev_info *bdi)
  29 {
  30         if (!bdi || !bdi->dev)
  31                 return "(unknown)";
  32         return dev_name(bdi->dev);
  33 }
  34 #endif
  35
  36 /*
  37  * Vanilla kernels before 4.0 do not implement inode_to_bdi
  38  * RHEL kernels before 3.10.0-327.10.1 do not implement inode_to_bdi
  39  * RHEL kernel 3.10.0-327.10.1 has inode_to_bdi
  40  * RHEL kernel 3.10.0-327.13.1 includes a partial merge of upstream
  41  *  commit a212b105b07d75b48b1a166378282e8a77fbf53d which inlines
  42  *  inode_to_bdi but not sb_is_blkdev_sb making it unusable by modules.
  43  */
  44 #if (LTTNG_LINUX_VERSION_CODE < LTTNG_KERNEL_VERSION(4,0,0))
  45 static inline struct backing_dev_info *lttng_inode_to_bdi(struct inode *inode)
  46 {
  47         struct super_block *sb;
  48
  49         if (!inode)
  50                 return &noop_backing_dev_info;
  51
  52         sb = inode->i_sb;
  53
  54         if (strcmp(sb->s_type->name, "bdev") == 0)
  55                 return inode->i_mapping->backing_dev_info;
  56
  57         return sb->s_bdi;
  58 }
  59 #else
  60 static inline struct backing_dev_info *lttng_inode_to_bdi(struct inode *inode)
  61 {
  62         return inode_to_bdi(inode);
  63 }
  64 #endif /* #if (LTTNG_LINUX_VERSION_CODE < LTTNG_KERNEL_VERSION(4,0,0)) */
  65
  66 #endif
  67
  68 /*
  69  * Keep this macro around to track changes in the valid values for `state`.
  70  * Eventually, we will have a enum to describe that field. If the macro is
  71  * changed by an upstream kernel, the fact that we have a redefinition here
  72  * will generate a compiler warning.
  73  */
  74 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,9,0) || \
  75         LTTNG_KERNEL_RANGE(4,14,218, 4,15,0) ||                 \
  76         LTTNG_KERNEL_RANGE(4,19,172, 4,20,0) ||                 \
  77         LTTNG_KERNEL_RANGE(5,4,94, 5,5,0) ||                    \
  78         LTTNG_UBUNTU_KERNEL_RANGE(4,15,18,141, 4,16,0,0))
  79 #define show_inode_state(state)                                 \
  80         __print_flags(state, "|",                               \
  81                 {I_DIRTY_SYNC,          "I_DIRTY_SYNC"},        \
  82                 {I_DIRTY_DATASYNC,      "I_DIRTY_DATASYNC"},    \
  83                 {I_DIRTY_PAGES,         "I_DIRTY_PAGES"},       \
  84                 {I_NEW,                 "I_NEW"},               \
  85                 {I_WILL_FREE,           "I_WILL_FREE"},         \
  86                 {I_FREEING,             "I_FREEING"},           \
  87                 {I_CLEAR,               "I_CLEAR"},             \
  88                 {I_SYNC,                "I_SYNC"},              \
  89                 {I_DIRTY_TIME,          "I_DIRTY_TIME"},        \
  90                 {I_REFERENCED,          "I_REFERENCED"}         \
  91         )
  92 #elif (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,0,0))
  93 #define show_inode_state(state)                                 \
  94         __print_flags(state, "|",                               \
  95                 {I_DIRTY_SYNC,          "I_DIRTY_SYNC"},        \
  96                 {I_DIRTY_DATASYNC,      "I_DIRTY_DATASYNC"},    \
  97                 {I_DIRTY_PAGES,         "I_DIRTY_PAGES"},       \
  98                 {I_NEW,                 "I_NEW"},               \
  99                 {I_WILL_FREE,           "I_WILL_FREE"},         \
 100                 {I_FREEING,             "I_FREEING"},           \
 101                 {I_CLEAR,               "I_CLEAR"},             \
 102                 {I_SYNC,                "I_SYNC"},              \
 103                 {I_DIRTY_TIME,          "I_DIRTY_TIME"},        \
 104                 {I_DIRTY_TIME_EXPIRED,  "I_DIRTY_TIME_EXPIRED"}, \
 105                 {I_REFERENCED,          "I_REFERENCED"}         \
 106         )
 107 #else /* #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,0,0)) */
 108 #define show_inode_state(state)                                 \
 109         __print_flags(state, "|",                               \
 110                 {I_DIRTY_SYNC,          "I_DIRTY_SYNC"},        \
 111                 {I_DIRTY_DATASYNC,      "I_DIRTY_DATASYNC"},    \
 112                 {I_DIRTY_PAGES,         "I_DIRTY_PAGES"},       \
 113                 {I_NEW,                 "I_NEW"},               \
 114                 {I_WILL_FREE,           "I_WILL_FREE"},         \
 115                 {I_FREEING,             "I_FREEING"},           \
 116                 {I_CLEAR,               "I_CLEAR"},             \
 117                 {I_SYNC,                "I_SYNC"},              \
 118                 {I_REFERENCED,          "I_REFERENCED"}         \
 119         )
 120 #endif /* #else #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,0,0)) */
 121
 122 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,0,0))
 123
 124 LTTNG_TRACEPOINT_EVENT(writeback_dirty_page,
 125         TP_PROTO(struct page *page, struct address_space *mapping),
 126         TP_ARGS(page, mapping),
 127         TP_FIELDS(
 128                 ctf_string(name, lttng_bdi_dev_name(mapping ? lttng_inode_to_bdi(mapping->host) : NULL))
 129                 ctf_integer(unsigned long, ino, mapping ? mapping->host->i_ino : 0)
 130                 ctf_integer(pgoff_t, index, page->index)
 131         )
 132 )
 133
 134 LTTNG_TRACEPOINT_EVENT_CLASS(writeback_dirty_inode_template,
 135         TP_PROTO(struct inode *inode, int flags),
 136         TP_ARGS(inode, flags),
 137         TP_FIELDS(
 138                 /* may be called for files on pseudo FSes w/ unregistered bdi */
 139                 ctf_string(name, lttng_bdi_dev_name(lttng_inode_to_bdi(inode)))
 140                 ctf_integer(unsigned long, ino, inode->i_ino)
 141                 ctf_integer(unsigned long, state, inode->i_state)
 142                 ctf_integer(unsigned long, flags, flags)
 143         )
 144 )
 145 #define LTTNG_TRACEPOINT_EVENT_WRITEBACK_DIRTY_INODE_TEMPLATE(name) \
 146 LTTNG_TRACEPOINT_EVENT_INSTANCE(writeback_dirty_inode_template, name, \
 147         TP_PROTO(struct inode *inode, int flags), \
 148         TP_ARGS(inode, flags))
 149 LTTNG_TRACEPOINT_EVENT_WRITEBACK_DIRTY_INODE_TEMPLATE(writeback_dirty_inode_start)
 150 LTTNG_TRACEPOINT_EVENT_WRITEBACK_DIRTY_INODE_TEMPLATE(writeback_dirty_inode)
 151 LTTNG_TRACEPOINT_EVENT_WRITEBACK_DIRTY_INODE_TEMPLATE(writeback_mark_inode_dirty)
 152
 153 LTTNG_TRACEPOINT_EVENT_CLASS(writeback_write_inode_template,
 154         TP_PROTO(struct inode *inode, struct writeback_control *wbc),
 155         TP_ARGS(inode, wbc),
 156         TP_FIELDS(
 157                 ctf_string(name, lttng_bdi_dev_name(lttng_inode_to_bdi(inode)))
 158                 ctf_integer(unsigned long, ino, inode->i_ino)
 159                 ctf_integer(int, sync_mode, wbc->sync_mode)
 160         )
 161 )
 162
 163 #define LTTNG_TRACEPOINT_EVENT_WRITEBACK_WRITE_INODE(name) \
 164 LTTNG_TRACEPOINT_EVENT_INSTANCE(writeback_write_inode_template, name, \
 165         TP_PROTO(struct inode *inode, struct writeback_control *wbc), \
 166         TP_ARGS(inode, wbc))
 167 LTTNG_TRACEPOINT_EVENT_WRITEBACK_WRITE_INODE(writeback_write_inode_start)
 168 LTTNG_TRACEPOINT_EVENT_WRITEBACK_WRITE_INODE(writeback_write_inode)
 169
 170 #elif (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,9,0))
 171
 172 LTTNG_TRACEPOINT_EVENT(writeback_dirty_page,
 173         TP_PROTO(struct page *page, struct address_space *mapping),
 174         TP_ARGS(page, mapping),
 175         TP_FIELDS(
 176                 ctf_string(name, lttng_bdi_dev_name(mapping ? mapping->backing_dev_info : NULL))
 177                 ctf_integer(unsigned long, ino, mapping ? mapping->host->i_ino : 0)
 178                 ctf_integer(pgoff_t, index, page->index)
 179         )
 180 )
 181
 182 LTTNG_TRACEPOINT_EVENT_CLASS(writeback_dirty_inode_template,
 183         TP_PROTO(struct inode *inode, int flags),
 184         TP_ARGS(inode, flags),
 185         TP_FIELDS(
 186                 /* may be called for files on pseudo FSes w/ unregistered bdi */
 187                 ctf_string(name, lttng_bdi_dev_name(inode->i_mapping->backing_dev_info))
 188                 ctf_integer(unsigned long, ino, inode->i_ino)
 189                 ctf_integer(unsigned long, flags, flags)
 190         )
 191 )
 192 #define LTTNG_TRACEPOINT_EVENT_WRITEBACK_DIRTY_INODE_TEMPLATE(name) \
 193 LTTNG_TRACEPOINT_EVENT_INSTANCE(writeback_dirty_inode_template, name, \
 194         TP_PROTO(struct inode *inode, int flags), \
 195         TP_ARGS(inode, flags))
 196 LTTNG_TRACEPOINT_EVENT_WRITEBACK_DIRTY_INODE_TEMPLATE(writeback_dirty_inode_start)
 197 LTTNG_TRACEPOINT_EVENT_WRITEBACK_DIRTY_INODE_TEMPLATE(writeback_dirty_inode)
 198
 199 LTTNG_TRACEPOINT_EVENT_CLASS(writeback_write_inode_template,
 200         TP_PROTO(struct inode *inode, struct writeback_control *wbc),
 201         TP_ARGS(inode, wbc),
 202         TP_FIELDS(
 203                 ctf_string(name, lttng_bdi_dev_name(inode->i_mapping->backing_dev_info))
 204                 ctf_integer(unsigned long, ino, inode->i_ino)
 205                 ctf_integer(int, sync_mode, wbc->sync_mode)
 206         )
 207 )
 208
 209 #define LTTNG_TRACEPOINT_EVENT_WRITEBACK_WRITE_INODE(name) \
 210 LTTNG_TRACEPOINT_EVENT_INSTANCE(writeback_write_inode_template, name, \
 211         TP_PROTO(struct inode *inode, struct writeback_control *wbc), \
 212         TP_ARGS(inode, wbc))
 213 LTTNG_TRACEPOINT_EVENT_WRITEBACK_WRITE_INODE(writeback_write_inode_start)
 214 LTTNG_TRACEPOINT_EVENT_WRITEBACK_WRITE_INODE(writeback_write_inode)
 215
 216 #endif /* (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,9,0)) */
 217
 218 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,3,0))
 219
 220 LTTNG_TRACEPOINT_EVENT_CLASS(writeback_work_class,
 221         TP_PROTO(struct bdi_writeback *wb, struct wb_writeback_work *work),
 222         TP_ARGS(wb, work),
 223         TP_FIELDS(
 224                 ctf_string(name, lttng_bdi_dev_name(wb->bdi))
 225         )
 226 )
 227
 228 #else
 229
 230 LTTNG_TRACEPOINT_EVENT_CLASS(writeback_work_class,
 231         TP_PROTO(struct backing_dev_info *bdi, struct wb_writeback_work *work),
 232         TP_ARGS(bdi, work),
 233         TP_FIELDS(
 234                 ctf_string(name, lttng_bdi_dev_name(bdi))
 235         )
 236 )
 237
 238 #endif /* #else if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,3,0)) */
 239
 240 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,3,0))
 241
 242 #define LTTNG_TRACEPOINT_EVENT_WRITEBACK_WORK_INSTANCE(name) \
 243 LTTNG_TRACEPOINT_EVENT_INSTANCE(writeback_work_class, name, \
 244         TP_PROTO(struct bdi_writeback *wb, struct wb_writeback_work *work), \
 245         TP_ARGS(wb, work))
 246
 247 #else /* #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,3,0)) */
 248
 249 #define LTTNG_TRACEPOINT_EVENT_WRITEBACK_WORK_INSTANCE(name) \
 250 LTTNG_TRACEPOINT_EVENT_INSTANCE(writeback_work_class, name, \
 251         TP_PROTO(struct backing_dev_info *bdi, struct wb_writeback_work *work), \
 252         TP_ARGS(bdi, work))
 253
 254 #endif /* #else #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,3,0)) */
 255
 256 LTTNG_TRACEPOINT_EVENT_WRITEBACK_WORK_INSTANCE(writeback_nothread)
 257 LTTNG_TRACEPOINT_EVENT_WRITEBACK_WORK_INSTANCE(writeback_queue)
 258 LTTNG_TRACEPOINT_EVENT_WRITEBACK_WORK_INSTANCE(writeback_exec)
 259 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,1,0))
 260 LTTNG_TRACEPOINT_EVENT_WRITEBACK_WORK_INSTANCE(writeback_start)
 261 LTTNG_TRACEPOINT_EVENT_WRITEBACK_WORK_INSTANCE(writeback_written)
 262 LTTNG_TRACEPOINT_EVENT_WRITEBACK_WORK_INSTANCE(writeback_wait)
 263 #endif
 264
 265 LTTNG_TRACEPOINT_EVENT(writeback_pages_written,
 266         TP_PROTO(long pages_written),
 267         TP_ARGS(pages_written),
 268         TP_FIELDS(
 269                 ctf_integer(long, pages, pages_written)
 270         )
 271 )
 272
 273 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,3,0))
 274
 275 LTTNG_TRACEPOINT_EVENT_CLASS(writeback_class,
 276         TP_PROTO(struct bdi_writeback *wb),
 277         TP_ARGS(wb),
 278         TP_FIELDS(
 279                 ctf_string(name, lttng_bdi_dev_name(wb->bdi))
 280         )
 281 )
 282
 283 #undef DEFINE_WRITEBACK_EVENT
 284 #define DEFINE_WRITEBACK_EVENT(name) \
 285 LTTNG_TRACEPOINT_EVENT_INSTANCE(writeback_class, name, \
 286         TP_PROTO(struct bdi_writeback *wb), \
 287         TP_ARGS(wb))
 288
 289 #define DEFINE_WRITEBACK_EVENT_MAP(name, map) \
 290 LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(writeback_class, name, map, \
 291         TP_PROTO(struct bdi_writeback *wb), \
 292         TP_ARGS(wb))
 293
 294 LTTNG_TRACEPOINT_EVENT(writeback_bdi_register,
 295         TP_PROTO(struct backing_dev_info *bdi),
 296         TP_ARGS(bdi),
 297         TP_FIELDS(
 298                 ctf_string(name, lttng_bdi_dev_name(bdi))
 299         )
 300 )
 301
 302 #else /* #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,3,0)) */
 303
 304 LTTNG_TRACEPOINT_EVENT_CLASS(writeback_class,
 305         TP_PROTO(struct backing_dev_info *bdi),
 306         TP_ARGS(bdi),
 307         TP_FIELDS(
 308                 ctf_string(name, lttng_bdi_dev_name(bdi))
 309         )
 310 )
 311
 312 #undef DEFINE_WRITEBACK_EVENT
 313 #define DEFINE_WRITEBACK_EVENT(name) \
 314 LTTNG_TRACEPOINT_EVENT_INSTANCE(writeback_class, name, \
 315         TP_PROTO(struct backing_dev_info *bdi), \
 316         TP_ARGS(bdi))
 317
 318 #define DEFINE_WRITEBACK_EVENT_MAP(name, map) \
 319 LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(writeback_class, name, map, \
 320         TP_PROTO(struct backing_dev_info *bdi), \
 321         TP_ARGS(bdi))
 322
 323 DEFINE_WRITEBACK_EVENT(writeback_bdi_register)
 324
 325 #endif /* #else #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,3,0)) */
 326
 327 DEFINE_WRITEBACK_EVENT(writeback_nowork)
 328 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(2,6,38))
 329 DEFINE_WRITEBACK_EVENT(writeback_wake_background)
 330 #endif
 331 DEFINE_WRITEBACK_EVENT(writeback_wake_thread)
 332 DEFINE_WRITEBACK_EVENT(writeback_wake_forker_thread)
 333 DEFINE_WRITEBACK_EVENT(writeback_bdi_unregister)
 334 DEFINE_WRITEBACK_EVENT(writeback_thread_start)
 335 DEFINE_WRITEBACK_EVENT(writeback_thread_stop)
 336 #if (LTTNG_KERNEL_RANGE(3,1,0, 3,2,0))
 337 DEFINE_WRITEBACK_EVENT_MAP(balance_dirty_start, writeback_balance_dirty_start)
 338 DEFINE_WRITEBACK_EVENT_MAP(balance_dirty_wait, writeback_balance_dirty_wait)
 339
 340 LTTNG_TRACEPOINT_EVENT_MAP(balance_dirty_written,
 341
 342         writeback_balance_dirty_written,
 343
 344         TP_PROTO(struct backing_dev_info *bdi, int written),
 345
 346         TP_ARGS(bdi, written),
 347
 348         TP_FIELDS(
 349                 ctf_string(name, lttng_bdi_dev_name(bdi))
 350                 ctf_integer(int, written, written)
 351         )
 352 )
 353 #endif
 354
 355 LTTNG_TRACEPOINT_EVENT_CLASS(writeback_wbc_class,
 356         TP_PROTO(struct writeback_control *wbc, struct backing_dev_info *bdi),
 357         TP_ARGS(wbc, bdi),
 358         TP_FIELDS(
 359                 ctf_string(name, lttng_bdi_dev_name(bdi))
 360                 ctf_integer(long, nr_to_write, wbc->nr_to_write)
 361                 ctf_integer(long, pages_skipped, wbc->pages_skipped)
 362                 ctf_integer(int, sync_mode, wbc->sync_mode)
 363                 ctf_integer(int, for_kupdate, wbc->for_kupdate)
 364                 ctf_integer(int, for_background, wbc->for_background)
 365                 ctf_integer(int, for_reclaim, wbc->for_reclaim)
 366                 ctf_integer(int, range_cyclic, wbc->range_cyclic)
 367 #if (LTTNG_LINUX_VERSION_CODE < LTTNG_KERNEL_VERSION(3,1,0))
 368                 ctf_integer(int, more_io, wbc->more_io)
 369                 ctf_integer(unsigned long, older_than_this,
 370                         wbc->older_than_this ? *wbc->older_than_this : 0)
 371 #endif
 372                 ctf_integer(long, range_start, (long) wbc->range_start)
 373                 ctf_integer(long, range_end, (long) wbc->range_end)
 374         )
 375 )
 376
 377 #undef DEFINE_WBC_EVENT
 378 #define LTTNG_TRACEPOINT_EVENT_WBC_INSTANCE(name, map) \
 379 LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(writeback_wbc_class, name, map, \
 380         TP_PROTO(struct writeback_control *wbc, struct backing_dev_info *bdi), \
 381         TP_ARGS(wbc, bdi))
 382 #if (LTTNG_LINUX_VERSION_CODE < LTTNG_KERNEL_VERSION(3,1,0))
 383 LTTNG_TRACEPOINT_EVENT_WBC_INSTANCE(wbc_writeback_start, writeback_wbc_writeback_start)
 384 LTTNG_TRACEPOINT_EVENT_WBC_INSTANCE(wbc_writeback_written, writeback_wbc_writeback_written)
 385 LTTNG_TRACEPOINT_EVENT_WBC_INSTANCE(wbc_writeback_wait, writeback_wbc_writeback_wait)
 386 LTTNG_TRACEPOINT_EVENT_WBC_INSTANCE(wbc_balance_dirty_start, writeback_wbc_balance_dirty_start)
 387 LTTNG_TRACEPOINT_EVENT_WBC_INSTANCE(wbc_balance_dirty_written, writeback_wbc_balance_dirty_written)
 388 LTTNG_TRACEPOINT_EVENT_WBC_INSTANCE(wbc_balance_dirty_wait, writeback_wbc_balance_dirty_wait)
 389 #endif
 390 LTTNG_TRACEPOINT_EVENT_WBC_INSTANCE(wbc_writepage, writeback_wbc_writepage)
 391
 392 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,9,0) || \
 393         LTTNG_KERNEL_RANGE(5,8,6, 5,9,0) || \
 394         LTTNG_KERNEL_RANGE(5,4,62, 5,5,0) || \
 395         LTTNG_KERNEL_RANGE(4,19,143, 4,20,0) || \
 396         LTTNG_KERNEL_RANGE(4,14,196, 4,15,0) || \
 397         LTTNG_KERNEL_RANGE(4,9,235, 4,10,0) || \
 398         LTTNG_KERNEL_RANGE(4,4,235, 4,5,0) || \
 399         LTTNG_UBUNTU_KERNEL_RANGE(4,15,18,119, 4,16,0,0))
 400 LTTNG_TRACEPOINT_EVENT(writeback_queue_io,
 401         TP_PROTO(struct bdi_writeback *wb,
 402                  struct wb_writeback_work *work,
 403                  unsigned long dirtied_before,
 404                  int moved),
 405         TP_ARGS(wb, work, dirtied_before, moved),
 406         TP_FIELDS(
 407                 ctf_string(name, lttng_bdi_dev_name(wb->bdi))
 408                 ctf_integer(unsigned long, older, dirtied_before)
 409                 ctf_integer(int, moved, moved)
 410         )
 411 )
 412 #elif (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,2,0))
 413 LTTNG_TRACEPOINT_EVENT(writeback_queue_io,
 414         TP_PROTO(struct bdi_writeback *wb,
 415                  struct wb_writeback_work *work,
 416                  int moved),
 417         TP_ARGS(wb, work, moved),
 418         TP_FIELDS(
 419                 ctf_string(name, lttng_bdi_dev_name(wb->bdi))
 420                 ctf_integer(int, moved, moved)
 421         )
 422 )
 423 #elif (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,1,0))
 424 LTTNG_TRACEPOINT_EVENT(writeback_queue_io,
 425         TP_PROTO(struct bdi_writeback *wb,
 426                  unsigned long *older_than_this,
 427                  int moved),
 428         TP_ARGS(wb, older_than_this, moved),
 429         TP_FIELDS(
 430                 ctf_string(name, lttng_bdi_dev_name(wb->bdi))
 431                 ctf_integer(unsigned long, older,
 432                         older_than_this ? *older_than_this : 0)
 433                 ctf_integer(long, age,
 434                         older_than_this ?
 435                                 (jiffies - *older_than_this) * 1000 / HZ
 436                                 : -1)
 437                 ctf_integer(int, moved, moved)
 438         )
 439 )
 440 #endif
 441
 442 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,8,0))
 443 LTTNG_TRACEPOINT_EVENT_MAP(global_dirty_state,
 444
 445         writeback_global_dirty_state,
 446
 447         TP_PROTO(unsigned long background_thresh,
 448                  unsigned long dirty_thresh
 449         ),
 450
 451         TP_ARGS(background_thresh,
 452                 dirty_thresh
 453         ),
 454
 455         TP_FIELDS(
 456                 ctf_integer(unsigned long, nr_dirty, global_node_page_state(NR_FILE_DIRTY))
 457                 ctf_integer(unsigned long, nr_writeback, global_node_page_state(NR_WRITEBACK))
 458                 ctf_integer(unsigned long, nr_dirtied, global_node_page_state(NR_DIRTIED))
 459                 ctf_integer(unsigned long, nr_written, global_node_page_state(NR_WRITTEN))
 460                 ctf_integer(unsigned long, background_thresh, background_thresh)
 461                 ctf_integer(unsigned long, dirty_thresh, dirty_thresh)
 462                 ctf_integer(unsigned long, dirty_limit, global_dirty_limit)
 463         )
 464 )
 465 #elif (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,14,0))
 466 LTTNG_TRACEPOINT_EVENT_MAP(global_dirty_state,
 467
 468         writeback_global_dirty_state,
 469
 470         TP_PROTO(unsigned long background_thresh,
 471                  unsigned long dirty_thresh
 472         ),
 473
 474         TP_ARGS(background_thresh,
 475                 dirty_thresh
 476         ),
 477
 478         TP_FIELDS(
 479                 ctf_integer(unsigned long, nr_dirty, global_node_page_state(NR_FILE_DIRTY))
 480                 ctf_integer(unsigned long, nr_writeback, global_node_page_state(NR_WRITEBACK))
 481                 ctf_integer(unsigned long, nr_unstable, global_node_page_state(NR_UNSTABLE_NFS))
 482                 ctf_integer(unsigned long, nr_dirtied, global_node_page_state(NR_DIRTIED))
 483                 ctf_integer(unsigned long, nr_written, global_node_page_state(NR_WRITTEN))
 484                 ctf_integer(unsigned long, background_thresh, background_thresh)
 485                 ctf_integer(unsigned long, dirty_thresh, dirty_thresh)
 486                 ctf_integer(unsigned long, dirty_limit, global_dirty_limit)
 487         )
 488 )
 489 #elif (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,1,0))
 490 LTTNG_TRACEPOINT_EVENT_MAP(global_dirty_state,
 491
 492         writeback_global_dirty_state,
 493
 494         TP_PROTO(unsigned long background_thresh,
 495                  unsigned long dirty_thresh
 496         ),
 497
 498         TP_ARGS(background_thresh,
 499                 dirty_thresh
 500         ),
 501
 502         TP_FIELDS(
 503                 ctf_integer(unsigned long, nr_dirty, global_page_state(NR_FILE_DIRTY))
 504                 ctf_integer(unsigned long, nr_writeback, global_page_state(NR_WRITEBACK))
 505                 ctf_integer(unsigned long, nr_unstable, global_page_state(NR_UNSTABLE_NFS))
 506                 ctf_integer(unsigned long, nr_dirtied, global_page_state(NR_DIRTIED))
 507                 ctf_integer(unsigned long, nr_written, global_page_state(NR_WRITTEN))
 508                 ctf_integer(unsigned long, background_thresh, background_thresh)
 509                 ctf_integer(unsigned long, dirty_thresh, dirty_thresh)
 510                 ctf_integer(unsigned long, dirty_limit, global_dirty_limit)
 511         )
 512 )
 513 #endif
 514
 515 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,2,0))
 516
 517 #define KBps(x)                 ((x) << (PAGE_SHIFT - 10))
 518
 519 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,3,0))
 520
 521 LTTNG_TRACEPOINT_EVENT_MAP(bdi_dirty_ratelimit,
 522
 523         writeback_bdi_dirty_ratelimit,
 524
 525         TP_PROTO(struct bdi_writeback *wb,
 526                  unsigned long dirty_rate,
 527                  unsigned long task_ratelimit),
 528
 529         TP_ARGS(wb, dirty_rate, task_ratelimit),
 530
 531         TP_FIELDS(
 532                 ctf_string(bdi, lttng_bdi_dev_name(wb->bdi))
 533                 ctf_integer(unsigned long, write_bw, KBps(wb->bdi->wb.write_bandwidth))
 534                 ctf_integer(unsigned long, avg_write_bw, KBps(wb->bdi->wb.avg_write_bandwidth))
 535                 ctf_integer(unsigned long, dirty_rate, KBps(dirty_rate))
 536                 ctf_integer(unsigned long, dirty_ratelimit, KBps(wb->bdi->wb.dirty_ratelimit))
 537                 ctf_integer(unsigned long, task_ratelimit, KBps(task_ratelimit))
 538                 ctf_integer(unsigned long, balanced_dirty_ratelimit,
 539                                         KBps(wb->bdi->wb.balanced_dirty_ratelimit))
 540         )
 541 )
 542
 543 #elif (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,2,0))
 544
 545 LTTNG_TRACEPOINT_EVENT_MAP(bdi_dirty_ratelimit,
 546
 547         writeback_bdi_dirty_ratelimit,
 548
 549         TP_PROTO(struct backing_dev_info *bdi,
 550                  unsigned long dirty_rate,
 551                  unsigned long task_ratelimit),
 552
 553         TP_ARGS(bdi, dirty_rate, task_ratelimit),
 554
 555         TP_FIELDS(
 556                 ctf_string(bdi, lttng_bdi_dev_name(bdi))
 557                 ctf_integer(unsigned long, write_bw, KBps(bdi->wb.write_bandwidth))
 558                 ctf_integer(unsigned long, avg_write_bw, KBps(bdi->wb.avg_write_bandwidth))
 559                 ctf_integer(unsigned long, dirty_rate, KBps(dirty_rate))
 560                 ctf_integer(unsigned long, dirty_ratelimit, KBps(bdi->wb.dirty_ratelimit))
 561                 ctf_integer(unsigned long, task_ratelimit, KBps(task_ratelimit))
 562                 ctf_integer(unsigned long, balanced_dirty_ratelimit,
 563                                         KBps(bdi->wb.balanced_dirty_ratelimit))
 564         )
 565 )
 566
 567 #else /* #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,2,0)) */
 568
 569 LTTNG_TRACEPOINT_EVENT_MAP(bdi_dirty_ratelimit,
 570
 571         writeback_bdi_dirty_ratelimit,
 572
 573         TP_PROTO(struct backing_dev_info *bdi,
 574                  unsigned long dirty_rate,
 575                  unsigned long task_ratelimit),
 576
 577         TP_ARGS(bdi, dirty_rate, task_ratelimit),
 578
 579         TP_FIELDS(
 580                 ctf_string(bdi, lttng_bdi_dev_name(bdi))
 581                 ctf_integer(unsigned long, write_bw, KBps(bdi->write_bandwidth))
 582                 ctf_integer(unsigned long, avg_write_bw, KBps(bdi->avg_write_bandwidth))
 583                 ctf_integer(unsigned long, dirty_rate, KBps(dirty_rate))
 584                 ctf_integer(unsigned long, dirty_ratelimit, KBps(bdi->dirty_ratelimit))
 585                 ctf_integer(unsigned long, task_ratelimit, KBps(task_ratelimit))
 586                 ctf_integer(unsigned long, balanced_dirty_ratelimit,
 587                                         KBps(bdi->balanced_dirty_ratelimit))
 588         )
 589 )
 590
 591 #endif /* #else #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,2,0)) */
 592
 593 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,3,0))
 594
 595 LTTNG_TRACEPOINT_EVENT_MAP(balance_dirty_pages,
 596
 597         writeback_balance_dirty_pages,
 598
 599         TP_PROTO(struct bdi_writeback *wb,
 600                  unsigned long thresh,
 601                  unsigned long bg_thresh,
 602                  unsigned long dirty,
 603                  unsigned long bdi_thresh,
 604                  unsigned long bdi_dirty,
 605                  unsigned long dirty_ratelimit,
 606                  unsigned long task_ratelimit,
 607                  unsigned long dirtied,
 608                  unsigned long period,
 609                  long pause,
 610                  unsigned long start_time),
 611
 612         TP_ARGS(wb, thresh, bg_thresh, dirty, bdi_thresh, bdi_dirty,
 613                 dirty_ratelimit, task_ratelimit,
 614                 dirtied, period, pause, start_time
 615         ),
 616
 617         TP_FIELDS(
 618                 ctf_string(bdi, lttng_bdi_dev_name(wb->bdi))
 619                 ctf_integer(unsigned long, limit, global_dirty_limit)
 620                 ctf_integer(unsigned long, setpoint,
 621                         (global_dirty_limit + (thresh + bg_thresh) / 2) / 2)
 622                 ctf_integer(unsigned long, dirty, dirty)
 623                 ctf_integer(unsigned long, bdi_setpoint,
 624                         ((global_dirty_limit + (thresh + bg_thresh) / 2) / 2) *
 625                                 bdi_thresh / (thresh + 1))
 626                 ctf_integer(unsigned long, bdi_dirty, bdi_dirty)
 627                 ctf_integer(unsigned long, dirty_ratelimit,
 628                         KBps(dirty_ratelimit))
 629                 ctf_integer(unsigned long, task_ratelimit,
 630                         KBps(task_ratelimit))
 631                 ctf_integer(unsigned int, dirtied, dirtied)
 632                 ctf_integer(unsigned int, dirtied_pause,
 633                         current->nr_dirtied_pause)
 634                 ctf_integer(unsigned long, paused,
 635                         (jiffies - start_time) * 1000 / HZ)
 636                 ctf_integer(long, pause, pause * 1000 / HZ)
 637                 ctf_integer(unsigned long, period,
 638                         period * 1000 / HZ)
 639                 ctf_integer(long, think,
 640                         current->dirty_paused_when == 0 ? 0 :
 641                                 (long)(jiffies - current->dirty_paused_when) * 1000/HZ)
 642         )
 643 )
 644
 645 #else /* #if LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,3,0)) */
 646
 647 LTTNG_TRACEPOINT_EVENT_MAP(balance_dirty_pages,
 648
 649         writeback_balance_dirty_pages,
 650
 651         TP_PROTO(struct backing_dev_info *bdi,
 652                  unsigned long thresh,
 653                  unsigned long bg_thresh,
 654                  unsigned long dirty,
 655                  unsigned long bdi_thresh,
 656                  unsigned long bdi_dirty,
 657                  unsigned long dirty_ratelimit,
 658                  unsigned long task_ratelimit,
 659                  unsigned long dirtied,
 660 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,3,0))
 661                  unsigned long period,
 662 #endif
 663                  long pause,
 664                  unsigned long start_time),
 665
 666         TP_ARGS(bdi, thresh, bg_thresh, dirty, bdi_thresh, bdi_dirty,
 667                 dirty_ratelimit, task_ratelimit,
 668 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,3,0))
 669                 dirtied, period, pause, start_time
 670 #else
 671                 dirtied, pause, start_time
 672 #endif
 673         ),
 674
 675         TP_FIELDS(
 676                 ctf_string(bdi, lttng_bdi_dev_name(bdi))
 677                 ctf_integer(unsigned long, limit, global_dirty_limit)
 678                 ctf_integer(unsigned long, setpoint,
 679                         (global_dirty_limit + (thresh + bg_thresh) / 2) / 2)
 680                 ctf_integer(unsigned long, dirty, dirty)
 681                 ctf_integer(unsigned long, bdi_setpoint,
 682                         ((global_dirty_limit + (thresh + bg_thresh) / 2) / 2) *
 683                                 bdi_thresh / (thresh + 1))
 684                 ctf_integer(unsigned long, bdi_dirty, bdi_dirty)
 685                 ctf_integer(unsigned long, dirty_ratelimit,
 686                         KBps(dirty_ratelimit))
 687                 ctf_integer(unsigned long, task_ratelimit,
 688                         KBps(task_ratelimit))
 689                 ctf_integer(unsigned int, dirtied, dirtied)
 690                 ctf_integer(unsigned int, dirtied_pause,
 691                         current->nr_dirtied_pause)
 692                 ctf_integer(unsigned long, paused,
 693                         (jiffies - start_time) * 1000 / HZ)
 694                 ctf_integer(long, pause, pause * 1000 / HZ)
 695 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,3,0))
 696                 ctf_integer(unsigned long, period,
 697                         period * 1000 / HZ)
 698                 ctf_integer(long, think,
 699                         current->dirty_paused_when == 0 ? 0 :
 700                                 (long)(jiffies - current->dirty_paused_when) * 1000/HZ)
 701 #endif
 702         )
 703 )
 704 #endif /* #else #if LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,3,0)) */
 705
 706 #endif /* #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,2,0)) */
 707
 708 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,5,0))
 709 LTTNG_TRACEPOINT_EVENT(writeback_sb_inodes_requeue,
 710
 711         TP_PROTO(struct inode *inode),
 712         TP_ARGS(inode),
 713
 714         TP_FIELDS(
 715                 ctf_string(name, lttng_bdi_dev_name(lttng_inode_to_bdi(inode)))
 716                 ctf_integer(unsigned long, ino, inode->i_ino)
 717                 ctf_integer(unsigned long, state, inode->i_state)
 718                 ctf_integer(unsigned long, dirtied_when, inode->dirtied_when)
 719         )
 720 )
 721 #endif
 722
 723 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(2,6,37))
 724 LTTNG_TRACEPOINT_EVENT_CLASS(writeback_congest_waited_template,
 725
 726         TP_PROTO(unsigned int usec_timeout, unsigned int usec_delayed),
 727
 728         TP_ARGS(usec_timeout, usec_delayed),
 729
 730         TP_FIELDS(
 731                 ctf_integer(unsigned int, usec_timeout, usec_timeout)
 732                 ctf_integer(unsigned int, usec_delayed, usec_delayed)
 733         )
 734 )
 735
 736 LTTNG_TRACEPOINT_EVENT_INSTANCE(writeback_congest_waited_template, writeback_congestion_wait,
 737
 738         TP_PROTO(unsigned int usec_timeout, unsigned int usec_delayed),
 739
 740         TP_ARGS(usec_timeout, usec_delayed)
 741 )
 742
 743 LTTNG_TRACEPOINT_EVENT_INSTANCE(writeback_congest_waited_template, writeback_wait_iff_congested,
 744
 745         TP_PROTO(unsigned int usec_timeout, unsigned int usec_delayed),
 746
 747         TP_ARGS(usec_timeout, usec_delayed)
 748 )
 749 #endif
 750
 751 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,1,0))
 752 LTTNG_TRACEPOINT_EVENT_CLASS(writeback_single_inode_template,
 753
 754         TP_PROTO(struct inode *inode,
 755                  struct writeback_control *wbc,
 756                  unsigned long nr_to_write
 757         ),
 758
 759         TP_ARGS(inode, wbc, nr_to_write),
 760
 761         TP_FIELDS(
 762                 ctf_string(name, lttng_bdi_dev_name(lttng_inode_to_bdi(inode)))
 763                 ctf_integer(unsigned long, ino, inode->i_ino)
 764                 ctf_integer(unsigned long, state, inode->i_state)
 765                 ctf_integer(unsigned long, dirtied_when, inode->dirtied_when)
 766                 ctf_integer(unsigned long, writeback_index,
 767                         inode->i_mapping->writeback_index)
 768                 ctf_integer(long, nr_to_write, nr_to_write)
 769                 ctf_integer(unsigned long, wrote,
 770                         nr_to_write - wbc->nr_to_write)
 771         )
 772 )
 773
 774 #if (LTTNG_LINUX_VERSION_CODE < LTTNG_KERNEL_VERSION(3,5,0))
 775 LTTNG_TRACEPOINT_EVENT_INSTANCE(writeback_single_inode_template, writeback_single_inode_requeue,
 776         TP_PROTO(struct inode *inode,
 777                 struct writeback_control *wbc,
 778                 unsigned long nr_to_write),
 779         TP_ARGS(inode, wbc, nr_to_write)
 780 )
 781 #endif
 782
 783 LTTNG_TRACEPOINT_EVENT_INSTANCE(writeback_single_inode_template, writeback_single_inode,
 784         TP_PROTO(struct inode *inode,
 785                  struct writeback_control *wbc,
 786                  unsigned long nr_to_write),
 787         TP_ARGS(inode, wbc, nr_to_write)
 788 )
 789 #endif
 790
 791 #endif /* LTTNG_TRACE_WRITEBACK_H */
 792
 793 /* This part must be outside protection */
 794 #include <probes/define_trace.h>