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authorLinus Torvalds <torvalds@linux-foundation.org>2017-09-07 11:59:42 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-09-07 11:59:42 -0700
commita0725ab0c7536076d5477264420ef420ebb64501 (patch)
tree5c972d46c7f58f634ad74c6e4bc7a2bee24e5956 /include
parent3ee31b89d9b12c01aa03dda7a923ef07a800eedd (diff)
parentef13ecbc134d7e0ca4ab4834d08bd20885b53c62 (diff)
Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block
Pull block layer updates from Jens Axboe: "This is the first pull request for 4.14, containing most of the code changes. It's a quiet series this round, which I think we needed after the churn of the last few series. This contains: - Fix for a registration race in loop, from Anton Volkov. - Overflow complaint fix from Arnd for DAC960. - Series of drbd changes from the usual suspects. - Conversion of the stec/skd driver to blk-mq. From Bart. - A few BFQ improvements/fixes from Paolo. - CFQ improvement from Ritesh, allowing idling for group idle. - A few fixes found by Dan's smatch, courtesy of Dan. - A warning fixup for a race between changing the IO scheduler and device remova. From David Jeffery. - A few nbd fixes from Josef. - Support for cgroup info in blktrace, from Shaohua. - Also from Shaohua, new features in the null_blk driver to allow it to actually hold data, among other things. - Various corner cases and error handling fixes from Weiping Zhang. - Improvements to the IO stats tracking for blk-mq from me. Can drastically improve performance for fast devices and/or big machines. - Series from Christoph removing bi_bdev as being needed for IO submission, in preparation for nvme multipathing code. - Series from Bart, including various cleanups and fixes for switch fall through case complaints" * 'for-4.14/block' of git://git.kernel.dk/linux-block: (162 commits) kernfs: checking for IS_ERR() instead of NULL drbd: remove BIOSET_NEED_RESCUER flag from drbd_{md_,}io_bio_set drbd: Fix allyesconfig build, fix recent commit drbd: switch from kmalloc() to kmalloc_array() drbd: abort drbd_start_resync if there is no connection drbd: move global variables to drbd namespace and make some static drbd: rename "usermode_helper" to "drbd_usermode_helper" drbd: fix race between handshake and admin disconnect/down drbd: fix potential deadlock when trying to detach during handshake drbd: A single dot should be put into a sequence. drbd: fix rmmod cleanup, remove _all_ debugfs entries drbd: Use setup_timer() instead of init_timer() to simplify the code. drbd: fix potential get_ldev/put_ldev refcount imbalance during attach drbd: new disk-option disable-write-same drbd: Fix resource role for newly created resources in events2 drbd: mark symbols static where possible drbd: Send P_NEG_ACK upon write error in protocol != C drbd: add explicit plugging when submitting batches drbd: change list_for_each_safe to while(list_first_entry_or_null) drbd: introduce drbd_recv_header_maybe_unplug ...
Diffstat (limited to 'include')
-rw-r--r--include/linux/bio.h27
-rw-r--r--include/linux/blk-cgroup.h3
-rw-r--r--include/linux/blk-mq.h5
-rw-r--r--include/linux/blk_types.h3
-rw-r--r--include/linux/blkdev.h60
-rw-r--r--include/linux/blktrace_api.h13
-rw-r--r--include/linux/cgroup.h16
-rw-r--r--include/linux/drbd.h2
-rw-r--r--include/linux/drbd_genl.h3
-rw-r--r--include/linux/drbd_limits.h8
-rw-r--r--include/linux/fs.h1
-rw-r--r--include/linux/genhd.h26
-rw-r--r--include/linux/kernfs.h28
-rw-r--r--include/trace/events/bcache.h6
-rw-r--r--include/trace/events/block.h16
-rw-r--r--include/trace/events/f2fs.h2
-rw-r--r--include/trace/events/writeback.h2
-rw-r--r--include/uapi/linux/blktrace_api.h3
18 files changed, 143 insertions, 81 deletions
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 1f0720de8990..275c91c99516 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -471,10 +471,11 @@ extern struct bio *bio_copy_kern(struct request_queue *, void *, unsigned int,
extern void bio_set_pages_dirty(struct bio *bio);
extern void bio_check_pages_dirty(struct bio *bio);
-void generic_start_io_acct(int rw, unsigned long sectors,
- struct hd_struct *part);
-void generic_end_io_acct(int rw, struct hd_struct *part,
- unsigned long start_time);
+void generic_start_io_acct(struct request_queue *q, int rw,
+ unsigned long sectors, struct hd_struct *part);
+void generic_end_io_acct(struct request_queue *q, int rw,
+ struct hd_struct *part,
+ unsigned long start_time);
#ifndef ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE
# error "You should define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE for your platform"
@@ -501,6 +502,24 @@ extern struct bio_vec *bvec_alloc(gfp_t, int, unsigned long *, mempool_t *);
extern void bvec_free(mempool_t *, struct bio_vec *, unsigned int);
extern unsigned int bvec_nr_vecs(unsigned short idx);
+#define bio_set_dev(bio, bdev) \
+do { \
+ (bio)->bi_disk = (bdev)->bd_disk; \
+ (bio)->bi_partno = (bdev)->bd_partno; \
+} while (0)
+
+#define bio_copy_dev(dst, src) \
+do { \
+ (dst)->bi_disk = (src)->bi_disk; \
+ (dst)->bi_partno = (src)->bi_partno; \
+} while (0)
+
+#define bio_dev(bio) \
+ disk_devt((bio)->bi_disk)
+
+#define bio_devname(bio, buf) \
+ __bdevname(bio_dev(bio), (buf))
+
#ifdef CONFIG_BLK_CGROUP
int bio_associate_blkcg(struct bio *bio, struct cgroup_subsys_state *blkcg_css);
int bio_associate_current(struct bio *bio);
diff --git a/include/linux/blk-cgroup.h b/include/linux/blk-cgroup.h
index 7104bea8dab1..9d92153dd856 100644
--- a/include/linux/blk-cgroup.h
+++ b/include/linux/blk-cgroup.h
@@ -691,6 +691,9 @@ static inline bool blkcg_bio_issue_check(struct request_queue *q,
rcu_read_lock();
blkcg = bio_blkcg(bio);
+ /* associate blkcg if bio hasn't attached one */
+ bio_associate_blkcg(bio, &blkcg->css);
+
blkg = blkg_lookup(blkcg, q);
if (unlikely(!blkg)) {
spin_lock_irq(q->queue_lock);
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index 14542308d25b..50c6485cb04f 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -97,7 +97,6 @@ typedef int (init_request_fn)(struct blk_mq_tag_set *set, struct request *,
unsigned int, unsigned int);
typedef void (exit_request_fn)(struct blk_mq_tag_set *set, struct request *,
unsigned int);
-typedef int (reinit_request_fn)(void *, struct request *);
typedef void (busy_iter_fn)(struct blk_mq_hw_ctx *, struct request *, void *,
bool);
@@ -143,7 +142,6 @@ struct blk_mq_ops {
*/
init_request_fn *init_request;
exit_request_fn *exit_request;
- reinit_request_fn *reinit_request;
/* Called from inside blk_get_request() */
void (*initialize_rq_fn)(struct request *rq);
@@ -261,7 +259,8 @@ void blk_freeze_queue_start(struct request_queue *q);
void blk_mq_freeze_queue_wait(struct request_queue *q);
int blk_mq_freeze_queue_wait_timeout(struct request_queue *q,
unsigned long timeout);
-int blk_mq_reinit_tagset(struct blk_mq_tag_set *set);
+int blk_mq_reinit_tagset(struct blk_mq_tag_set *set,
+ int (reinit_request)(void *, struct request *));
int blk_mq_map_queues(struct blk_mq_tag_set *set);
void blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set, int nr_hw_queues);
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index d2eb87c84d82..a2d2aa709cef 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -48,7 +48,8 @@ struct blk_issue_stat {
*/
struct bio {
struct bio *bi_next; /* request queue link */
- struct block_device *bi_bdev;
+ struct gendisk *bi_disk;
+ u8 bi_partno;
blk_status_t bi_status;
unsigned int bi_opf; /* bottom bits req flags,
* top bits REQ_OP. Use
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 4b99b13c7e68..460294bb0fa5 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -600,38 +600,36 @@ struct request_queue {
u64 write_hints[BLK_MAX_WRITE_HINTS];
};
-#define QUEUE_FLAG_QUEUED 1 /* uses generic tag queueing */
-#define QUEUE_FLAG_STOPPED 2 /* queue is stopped */
-#define QUEUE_FLAG_SYNCFULL 3 /* read queue has been filled */
-#define QUEUE_FLAG_ASYNCFULL 4 /* write queue has been filled */
-#define QUEUE_FLAG_DYING 5 /* queue being torn down */
-#define QUEUE_FLAG_BYPASS 6 /* act as dumb FIFO queue */
-#define QUEUE_FLAG_BIDI 7 /* queue supports bidi requests */
-#define QUEUE_FLAG_NOMERGES 8 /* disable merge attempts */
-#define QUEUE_FLAG_SAME_COMP 9 /* complete on same CPU-group */
-#define QUEUE_FLAG_FAIL_IO 10 /* fake timeout */
-#define QUEUE_FLAG_STACKABLE 11 /* supports request stacking */
-#define QUEUE_FLAG_NONROT 12 /* non-rotational device (SSD) */
+#define QUEUE_FLAG_QUEUED 0 /* uses generic tag queueing */
+#define QUEUE_FLAG_STOPPED 1 /* queue is stopped */
+#define QUEUE_FLAG_DYING 2 /* queue being torn down */
+#define QUEUE_FLAG_BYPASS 3 /* act as dumb FIFO queue */
+#define QUEUE_FLAG_BIDI 4 /* queue supports bidi requests */
+#define QUEUE_FLAG_NOMERGES 5 /* disable merge attempts */
+#define QUEUE_FLAG_SAME_COMP 6 /* complete on same CPU-group */
+#define QUEUE_FLAG_FAIL_IO 7 /* fake timeout */
+#define QUEUE_FLAG_STACKABLE 8 /* supports request stacking */
+#define QUEUE_FLAG_NONROT 9 /* non-rotational device (SSD) */
#define QUEUE_FLAG_VIRT QUEUE_FLAG_NONROT /* paravirt device */
-#define QUEUE_FLAG_IO_STAT 13 /* do IO stats */
-#define QUEUE_FLAG_DISCARD 14 /* supports DISCARD */
-#define QUEUE_FLAG_NOXMERGES 15 /* No extended merges */
-#define QUEUE_FLAG_ADD_RANDOM 16 /* Contributes to random pool */
-#define QUEUE_FLAG_SECERASE 17 /* supports secure erase */
-#define QUEUE_FLAG_SAME_FORCE 18 /* force complete on same CPU */
-#define QUEUE_FLAG_DEAD 19 /* queue tear-down finished */
-#define QUEUE_FLAG_INIT_DONE 20 /* queue is initialized */
-#define QUEUE_FLAG_NO_SG_MERGE 21 /* don't attempt to merge SG segments*/
-#define QUEUE_FLAG_POLL 22 /* IO polling enabled if set */
-#define QUEUE_FLAG_WC 23 /* Write back caching */
-#define QUEUE_FLAG_FUA 24 /* device supports FUA writes */
-#define QUEUE_FLAG_FLUSH_NQ 25 /* flush not queueuable */
-#define QUEUE_FLAG_DAX 26 /* device supports DAX */
-#define QUEUE_FLAG_STATS 27 /* track rq completion times */
-#define QUEUE_FLAG_POLL_STATS 28 /* collecting stats for hybrid polling */
-#define QUEUE_FLAG_REGISTERED 29 /* queue has been registered to a disk */
-#define QUEUE_FLAG_SCSI_PASSTHROUGH 30 /* queue supports SCSI commands */
-#define QUEUE_FLAG_QUIESCED 31 /* queue has been quiesced */
+#define QUEUE_FLAG_IO_STAT 10 /* do IO stats */
+#define QUEUE_FLAG_DISCARD 11 /* supports DISCARD */
+#define QUEUE_FLAG_NOXMERGES 12 /* No extended merges */
+#define QUEUE_FLAG_ADD_RANDOM 13 /* Contributes to random pool */
+#define QUEUE_FLAG_SECERASE 14 /* supports secure erase */
+#define QUEUE_FLAG_SAME_FORCE 15 /* force complete on same CPU */
+#define QUEUE_FLAG_DEAD 16 /* queue tear-down finished */
+#define QUEUE_FLAG_INIT_DONE 17 /* queue is initialized */
+#define QUEUE_FLAG_NO_SG_MERGE 18 /* don't attempt to merge SG segments*/
+#define QUEUE_FLAG_POLL 19 /* IO polling enabled if set */
+#define QUEUE_FLAG_WC 20 /* Write back caching */
+#define QUEUE_FLAG_FUA 21 /* device supports FUA writes */
+#define QUEUE_FLAG_FLUSH_NQ 22 /* flush not queueuable */
+#define QUEUE_FLAG_DAX 23 /* device supports DAX */
+#define QUEUE_FLAG_STATS 24 /* track rq completion times */
+#define QUEUE_FLAG_POLL_STATS 25 /* collecting stats for hybrid polling */
+#define QUEUE_FLAG_REGISTERED 26 /* queue has been registered to a disk */
+#define QUEUE_FLAG_SCSI_PASSTHROUGH 27 /* queue supports SCSI commands */
+#define QUEUE_FLAG_QUIESCED 28 /* queue has been quiesced */
#define QUEUE_FLAG_DEFAULT ((1 << QUEUE_FLAG_IO_STAT) | \
(1 << QUEUE_FLAG_STACKABLE) | \
diff --git a/include/linux/blktrace_api.h b/include/linux/blktrace_api.h
index d2e908586e3d..67b4d4dfc19c 100644
--- a/include/linux/blktrace_api.h
+++ b/include/linux/blktrace_api.h
@@ -28,10 +28,12 @@ struct blk_trace {
atomic_t dropped;
};
+struct blkcg;
+
extern int blk_trace_ioctl(struct block_device *, unsigned, char __user *);
extern void blk_trace_shutdown(struct request_queue *);
-extern __printf(2, 3)
-void __trace_note_message(struct blk_trace *, const char *fmt, ...);
+extern __printf(3, 4)
+void __trace_note_message(struct blk_trace *, struct blkcg *blkcg, const char *fmt, ...);
/**
* blk_add_trace_msg - Add a (simple) message to the blktrace stream
@@ -46,12 +48,14 @@ void __trace_note_message(struct blk_trace *, const char *fmt, ...);
* NOTE: Can not use 'static inline' due to presence of var args...
*
**/
-#define blk_add_trace_msg(q, fmt, ...) \
+#define blk_add_cgroup_trace_msg(q, cg, fmt, ...) \
do { \
struct blk_trace *bt = (q)->blk_trace; \
if (unlikely(bt)) \
- __trace_note_message(bt, fmt, ##__VA_ARGS__); \
+ __trace_note_message(bt, cg, fmt, ##__VA_ARGS__);\
} while (0)
+#define blk_add_trace_msg(q, fmt, ...) \
+ blk_add_cgroup_trace_msg(q, NULL, fmt, ##__VA_ARGS__)
#define BLK_TN_MAX_MSG 128
static inline bool blk_trace_note_message_enabled(struct request_queue *q)
@@ -82,6 +86,7 @@ extern struct attribute_group blk_trace_attr_group;
# define blk_trace_startstop(q, start) (-ENOTTY)
# define blk_trace_remove(q) (-ENOTTY)
# define blk_add_trace_msg(q, fmt, ...) do { } while (0)
+# define blk_add_cgroup_trace_msg(q, cg, fmt, ...) do { } while (0)
# define blk_trace_remove_sysfs(dev) do { } while (0)
# define blk_trace_note_message_enabled(q) (false)
static inline int blk_trace_init_sysfs(struct device *dev)
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index 085056e562b1..d023ac5e377f 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -578,7 +578,7 @@ static inline bool cgroup_is_populated(struct cgroup *cgrp)
/* returns ino associated with a cgroup */
static inline ino_t cgroup_ino(struct cgroup *cgrp)
{
- return cgrp->kn->ino;
+ return cgrp->kn->id.ino;
}
/* cft/css accessors for cftype->write() operation */
@@ -644,6 +644,13 @@ static inline void cgroup_kthread_ready(void)
current->no_cgroup_migration = 0;
}
+static inline union kernfs_node_id *cgroup_get_kernfs_id(struct cgroup *cgrp)
+{
+ return &cgrp->kn->id;
+}
+
+void cgroup_path_from_kernfs_id(const union kernfs_node_id *id,
+ char *buf, size_t buflen);
#else /* !CONFIG_CGROUPS */
struct cgroup_subsys_state;
@@ -666,12 +673,19 @@ static inline int cgroup_init_early(void) { return 0; }
static inline int cgroup_init(void) { return 0; }
static inline void cgroup_init_kthreadd(void) {}
static inline void cgroup_kthread_ready(void) {}
+static inline union kernfs_node_id *cgroup_get_kernfs_id(struct cgroup *cgrp)
+{
+ return NULL;
+}
static inline bool task_under_cgroup_hierarchy(struct task_struct *task,
struct cgroup *ancestor)
{
return true;
}
+
+static inline void cgroup_path_from_kernfs_id(const union kernfs_node_id *id,
+ char *buf, size_t buflen) {}
#endif /* !CONFIG_CGROUPS */
/*
diff --git a/include/linux/drbd.h b/include/linux/drbd.h
index 002611c85318..2d0259327721 100644
--- a/include/linux/drbd.h
+++ b/include/linux/drbd.h
@@ -51,7 +51,7 @@
#endif
extern const char *drbd_buildtag(void);
-#define REL_VERSION "8.4.7"
+#define REL_VERSION "8.4.10"
#define API_VERSION 1
#define PRO_VERSION_MIN 86
#define PRO_VERSION_MAX 101
diff --git a/include/linux/drbd_genl.h b/include/linux/drbd_genl.h
index 2896f93808ae..4e6d4d4c7056 100644
--- a/include/linux/drbd_genl.h
+++ b/include/linux/drbd_genl.h
@@ -132,7 +132,8 @@ GENL_struct(DRBD_NLA_DISK_CONF, 3, disk_conf,
__flg_field_def(18, DRBD_GENLA_F_MANDATORY, disk_drain, DRBD_DISK_DRAIN_DEF)
__flg_field_def(19, DRBD_GENLA_F_MANDATORY, md_flushes, DRBD_MD_FLUSHES_DEF)
__flg_field_def(23, 0 /* OPTIONAL */, al_updates, DRBD_AL_UPDATES_DEF)
- __flg_field_def(24, 0 /* OPTIONAL */, discard_zeroes_if_aligned, DRBD_DISCARD_ZEROES_IF_ALIGNED)
+ __flg_field_def(24, 0 /* OPTIONAL */, discard_zeroes_if_aligned, DRBD_DISCARD_ZEROES_IF_ALIGNED_DEF)
+ __flg_field_def(26, 0 /* OPTIONAL */, disable_write_same, DRBD_DISABLE_WRITE_SAME_DEF)
)
GENL_struct(DRBD_NLA_RESOURCE_OPTS, 4, res_opts,
diff --git a/include/linux/drbd_limits.h b/include/linux/drbd_limits.h
index ddac68422a96..24ae1b9b76c7 100644
--- a/include/linux/drbd_limits.h
+++ b/include/linux/drbd_limits.h
@@ -209,12 +209,18 @@
#define DRBD_MD_FLUSHES_DEF 1
#define DRBD_TCP_CORK_DEF 1
#define DRBD_AL_UPDATES_DEF 1
+
/* We used to ignore the discard_zeroes_data setting.
* To not change established (and expected) behaviour,
* by default assume that, for discard_zeroes_data=0,
* we can make that an effective discard_zeroes_data=1,
* if we only explicitly zero-out unaligned partial chunks. */
-#define DRBD_DISCARD_ZEROES_IF_ALIGNED 1
+#define DRBD_DISCARD_ZEROES_IF_ALIGNED_DEF 1
+
+/* Some backends pretend to support WRITE SAME,
+ * but fail such requests when they are actually submitted.
+ * This is to tell DRBD to not even try. */
+#define DRBD_DISABLE_WRITE_SAME_DEF 0
#define DRBD_ALLOW_TWO_PRIMARIES_DEF 0
#define DRBD_ALWAYS_ASBP_DEF 0
diff --git a/include/linux/fs.h b/include/linux/fs.h
index c57002ae6520..7d6079dceb39 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -429,6 +429,7 @@ struct block_device {
#endif
struct block_device * bd_contains;
unsigned bd_block_size;
+ u8 bd_partno;
struct hd_struct * bd_part;
/* number of times partitions within this device have been opened. */
unsigned bd_part_count;
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index e619fae2f037..ea652bfcd675 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -362,24 +362,12 @@ static inline void free_part_stats(struct hd_struct *part)
#define part_stat_sub(cpu, gendiskp, field, subnd) \
part_stat_add(cpu, gendiskp, field, -subnd)
-static inline void part_inc_in_flight(struct hd_struct *part, int rw)
-{
- atomic_inc(&part->in_flight[rw]);
- if (part->partno)
- atomic_inc(&part_to_disk(part)->part0.in_flight[rw]);
-}
-
-static inline void part_dec_in_flight(struct hd_struct *part, int rw)
-{
- atomic_dec(&part->in_flight[rw]);
- if (part->partno)
- atomic_dec(&part_to_disk(part)->part0.in_flight[rw]);
-}
-
-static inline int part_in_flight(struct hd_struct *part)
-{
- return atomic_read(&part->in_flight[0]) + atomic_read(&part->in_flight[1]);
-}
+void part_in_flight(struct request_queue *q, struct hd_struct *part,
+ unsigned int inflight[2]);
+void part_dec_in_flight(struct request_queue *q, struct hd_struct *part,
+ int rw);
+void part_inc_in_flight(struct request_queue *q, struct hd_struct *part,
+ int rw);
static inline struct partition_meta_info *alloc_part_info(struct gendisk *disk)
{
@@ -395,7 +383,7 @@ static inline void free_part_info(struct hd_struct *part)
}
/* block/blk-core.c */
-extern void part_round_stats(int cpu, struct hd_struct *part);
+extern void part_round_stats(struct request_queue *q, int cpu, struct hd_struct *part);
/* block/genhd.c */
extern void device_add_disk(struct device *parent, struct gendisk *disk);
diff --git a/include/linux/kernfs.h b/include/linux/kernfs.h
index a9b11b8d06f2..ab25c8b6d9e3 100644
--- a/include/linux/kernfs.h
+++ b/include/linux/kernfs.h
@@ -69,6 +69,12 @@ enum kernfs_root_flag {
* following flag enables that behavior.
*/
KERNFS_ROOT_EXTRA_OPEN_PERM_CHECK = 0x0002,
+
+ /*
+ * The filesystem supports exportfs operation, so userspace can use
+ * fhandle to access nodes of the fs.
+ */
+ KERNFS_ROOT_SUPPORT_EXPORTOP = 0x0004,
};
/* type-specific structures for kernfs_node union members */
@@ -95,6 +101,21 @@ struct kernfs_elem_attr {
struct kernfs_node *notify_next; /* for kernfs_notify() */
};
+/* represent a kernfs node */
+union kernfs_node_id {
+ struct {
+ /*
+ * blktrace will export this struct as a simplified 'struct
+ * fid' (which is a big data struction), so userspace can use
+ * it to find kernfs node. The layout must match the first two
+ * fields of 'struct fid' exactly.
+ */
+ u32 ino;
+ u32 generation;
+ };
+ u64 id;
+};
+
/*
* kernfs_node - the building block of kernfs hierarchy. Each and every
* kernfs node is represented by single kernfs_node. Most fields are
@@ -131,9 +152,9 @@ struct kernfs_node {
void *priv;
+ union kernfs_node_id id;
unsigned short flags;
umode_t mode;
- unsigned int ino;
struct kernfs_iattrs *iattr;
};
@@ -163,7 +184,8 @@ struct kernfs_root {
unsigned int flags; /* KERNFS_ROOT_* flags */
/* private fields, do not use outside kernfs proper */
- struct ida ino_ida;
+ struct idr ino_idr;
+ u32 next_generation;
struct kernfs_syscall_ops *syscall_ops;
/* list of kernfs_super_info of this root, protected by kernfs_mutex */
@@ -336,6 +358,8 @@ struct super_block *kernfs_pin_sb(struct kernfs_root *root, const void *ns);
void kernfs_init(void);
+struct kernfs_node *kernfs_get_node_by_id(struct kernfs_root *root,
+ const union kernfs_node_id *id);
#else /* CONFIG_KERNFS */
static inline enum kernfs_node_type kernfs_type(struct kernfs_node *kn)
diff --git a/include/trace/events/bcache.h b/include/trace/events/bcache.h
index df3e9ae5ad8d..daf749138ff8 100644
--- a/include/trace/events/bcache.h
+++ b/include/trace/events/bcache.h
@@ -21,7 +21,7 @@ DECLARE_EVENT_CLASS(bcache_request,
),
TP_fast_assign(
- __entry->dev = bio->bi_bdev->bd_dev;
+ __entry->dev = bio_dev(bio);
__entry->orig_major = d->disk->major;
__entry->orig_minor = d->disk->first_minor;
__entry->sector = bio->bi_iter.bi_sector;
@@ -98,7 +98,7 @@ DECLARE_EVENT_CLASS(bcache_bio,
),
TP_fast_assign(
- __entry->dev = bio->bi_bdev->bd_dev;
+ __entry->dev = bio_dev(bio);
__entry->sector = bio->bi_iter.bi_sector;
__entry->nr_sector = bio->bi_iter.bi_size >> 9;
blk_fill_rwbs(__entry->rwbs, bio->bi_opf, bio->bi_iter.bi_size);
@@ -133,7 +133,7 @@ TRACE_EVENT(bcache_read,
),
TP_fast_assign(
- __entry->dev = bio->bi_bdev->bd_dev;
+ __entry->dev = bio_dev(bio);
__entry->sector = bio->bi_iter.bi_sector;
__entry->nr_sector = bio->bi_iter.bi_size >> 9;
blk_fill_rwbs(__entry->rwbs, bio->bi_opf, bio->bi_iter.bi_size);
diff --git a/include/trace/events/block.h b/include/trace/events/block.h
index d0dbe60d8a6d..f815aaaef755 100644
--- a/include/trace/events/block.h
+++ b/include/trace/events/block.h
@@ -236,8 +236,7 @@ TRACE_EVENT(block_bio_bounce,
),
TP_fast_assign(
- __entry->dev = bio->bi_bdev ?
- bio->bi_bdev->bd_dev : 0;
+ __entry->dev = bio_dev(bio);
__entry->sector = bio->bi_iter.bi_sector;
__entry->nr_sector = bio_sectors(bio);
blk_fill_rwbs(__entry->rwbs, bio->bi_opf, bio->bi_iter.bi_size);
@@ -274,7 +273,7 @@ TRACE_EVENT(block_bio_complete,
),
TP_fast_assign(
- __entry->dev = bio->bi_bdev->bd_dev;
+ __entry->dev = bio_dev(bio);
__entry->sector = bio->bi_iter.bi_sector;
__entry->nr_sector = bio_sectors(bio);
__entry->error = error;
@@ -302,7 +301,7 @@ DECLARE_EVENT_CLASS(block_bio_merge,
),
TP_fast_assign(
- __entry->dev = bio->bi_bdev->bd_dev;
+ __entry->dev = bio_dev(bio);
__entry->sector = bio->bi_iter.bi_sector;
__entry->nr_sector = bio_sectors(bio);
blk_fill_rwbs(__entry->rwbs, bio->bi_opf, bio->bi_iter.bi_size);
@@ -369,7 +368,7 @@ TRACE_EVENT(block_bio_queue,
),
TP_fast_assign(
- __entry->dev = bio->bi_bdev->bd_dev;
+ __entry->dev = bio_dev(bio);
__entry->sector = bio->bi_iter.bi_sector;
__entry->nr_sector = bio_sectors(bio);
blk_fill_rwbs(__entry->rwbs, bio->bi_opf, bio->bi_iter.bi_size);
@@ -397,7 +396,8 @@ DECLARE_EVENT_CLASS(block_get_rq,
),
TP_fast_assign(
- __entry->dev = bio ? bio->bi_bdev->bd_dev : 0;
+ __entry->dev = bio ? bio_dev(bio) : 0;
+ __entry->dev = bio_dev(bio);
__entry->sector = bio ? bio->bi_iter.bi_sector : 0;
__entry->nr_sector = bio ? bio_sectors(bio) : 0;
blk_fill_rwbs(__entry->rwbs,
@@ -532,7 +532,7 @@ TRACE_EVENT(block_split,
),
TP_fast_assign(
- __entry->dev = bio->bi_bdev->bd_dev;
+ __entry->dev = bio_dev(bio);
__entry->sector = bio->bi_iter.bi_sector;
__entry->new_sector = new_sector;
blk_fill_rwbs(__entry->rwbs, bio->bi_opf, bio->bi_iter.bi_size);
@@ -573,7 +573,7 @@ TRACE_EVENT(block_bio_remap,
),
TP_fast_assign(
- __entry->dev = bio->bi_bdev->bd_dev;
+ __entry->dev = bio_dev(bio);
__entry->sector = bio->bi_iter.bi_sector;
__entry->nr_sector = bio_sectors(bio);
__entry->old_dev = dev;
diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index 6f77a2755abb..bc4dd7837e4c 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -829,7 +829,7 @@ DECLARE_EVENT_CLASS(f2fs__bio,
TP_fast_assign(
__entry->dev = sb->s_dev;
- __entry->target = bio->bi_bdev->bd_dev;
+ __entry->target = bio_dev(bio);
__entry->op = bio_op(bio);
__entry->op_flags = bio->bi_opf;
__entry->type = type;
diff --git a/include/trace/events/writeback.h b/include/trace/events/writeback.h
index 7bd8783a590f..9b57f014d79d 100644
--- a/include/trace/events/writeback.h
+++ b/include/trace/events/writeback.h
@@ -136,7 +136,7 @@ DEFINE_EVENT(writeback_dirty_inode_template, writeback_dirty_inode,
static inline unsigned int __trace_wb_assign_cgroup(struct bdi_writeback *wb)
{
- return wb->memcg_css->cgroup->kn->ino;
+ return wb->memcg_css->cgroup->kn->id.ino;
}
static inline unsigned int __trace_wbc_assign_cgroup(struct writeback_control *wbc)
diff --git a/include/uapi/linux/blktrace_api.h b/include/uapi/linux/blktrace_api.h
index c590ca6bfbd9..9cdaedeadb84 100644
--- a/include/uapi/linux/blktrace_api.h
+++ b/include/uapi/linux/blktrace_api.h
@@ -52,6 +52,7 @@ enum blktrace_act {
__BLK_TA_REMAP, /* bio was remapped */
__BLK_TA_ABORT, /* request aborted */
__BLK_TA_DRV_DATA, /* driver-specific binary data */
+ __BLK_TA_CGROUP = 1 << 8, /* from a cgroup*/
};
/*
@@ -61,6 +62,7 @@ enum blktrace_notify {
__BLK_TN_PROCESS = 0, /* establish pid/name mapping */
__BLK_TN_TIMESTAMP, /* include system clock */
__BLK_TN_MESSAGE, /* Character string message */
+ __BLK_TN_CGROUP = __BLK_TA_CGROUP, /* from a cgroup */
};
@@ -107,6 +109,7 @@ struct blk_io_trace {
__u32 cpu; /* on what cpu did it happen */
__u16 error; /* completion error */
__u16 pdu_len; /* length of data after this trace */
+ /* cgroup id will be stored here if exists */
};
/*