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-rw-r--r--include/linux/fscache-cache.h40
-rw-r--r--include/linux/fscache.h27
-rw-r--r--include/linux/i2c-pnx.h2
-rw-r--r--include/linux/slow-work.h72
-rw-r--r--include/linux/vt.h4
5 files changed, 138 insertions, 7 deletions
diff --git a/include/linux/fscache-cache.h b/include/linux/fscache-cache.h
index 84d3532dd3ea..7be0c6fbe880 100644
--- a/include/linux/fscache-cache.h
+++ b/include/linux/fscache-cache.h
@@ -91,6 +91,8 @@ struct fscache_operation {
#define FSCACHE_OP_WAITING 4 /* cleared when op is woken */
#define FSCACHE_OP_EXCLUSIVE 5 /* exclusive op, other ops must wait */
#define FSCACHE_OP_DEAD 6 /* op is now dead */
+#define FSCACHE_OP_DEC_READ_CNT 7 /* decrement object->n_reads on destruction */
+#define FSCACHE_OP_KEEP_FLAGS 0xc0 /* flags to keep when repurposing an op */
atomic_t usage;
unsigned debug_id; /* debugging ID */
@@ -102,6 +104,16 @@ struct fscache_operation {
/* operation releaser */
fscache_operation_release_t release;
+
+#ifdef CONFIG_SLOW_WORK_PROC
+ const char *name; /* operation name */
+ const char *state; /* operation state */
+#define fscache_set_op_name(OP, N) do { (OP)->name = (N); } while(0)
+#define fscache_set_op_state(OP, S) do { (OP)->state = (S); } while(0)
+#else
+#define fscache_set_op_name(OP, N) do { } while(0)
+#define fscache_set_op_state(OP, S) do { } while(0)
+#endif
};
extern atomic_t fscache_op_debug_id;
@@ -125,6 +137,7 @@ static inline void fscache_operation_init(struct fscache_operation *op,
op->debug_id = atomic_inc_return(&fscache_op_debug_id);
op->release = release;
INIT_LIST_HEAD(&op->pend_link);
+ fscache_set_op_state(op, "Init");
}
/**
@@ -221,8 +234,10 @@ struct fscache_cache_ops {
struct fscache_object *(*alloc_object)(struct fscache_cache *cache,
struct fscache_cookie *cookie);
- /* look up the object for a cookie */
- void (*lookup_object)(struct fscache_object *object);
+ /* look up the object for a cookie
+ * - return -ETIMEDOUT to be requeued
+ */
+ int (*lookup_object)(struct fscache_object *object);
/* finished looking up */
void (*lookup_complete)(struct fscache_object *object);
@@ -297,12 +312,14 @@ struct fscache_cookie {
atomic_t usage; /* number of users of this cookie */
atomic_t n_children; /* number of children of this cookie */
spinlock_t lock;
+ spinlock_t stores_lock; /* lock on page store tree */
struct hlist_head backing_objects; /* object(s) backing this file/index */
const struct fscache_cookie_def *def; /* definition */
struct fscache_cookie *parent; /* parent of this entry */
void *netfs_data; /* back pointer to netfs */
struct radix_tree_root stores; /* pages to be stored on this cookie */
#define FSCACHE_COOKIE_PENDING_TAG 0 /* pages tag: pending write to cache */
+#define FSCACHE_COOKIE_STORING_TAG 1 /* pages tag: writing to cache */
unsigned long flags;
#define FSCACHE_COOKIE_LOOKING_UP 0 /* T if non-index cookie being looked up still */
@@ -337,6 +354,7 @@ struct fscache_object {
FSCACHE_OBJECT_RECYCLING, /* retiring object */
FSCACHE_OBJECT_WITHDRAWING, /* withdrawing object */
FSCACHE_OBJECT_DEAD, /* object is now dead */
+ FSCACHE_OBJECT__NSTATES
} state;
int debug_id; /* debugging ID */
@@ -345,6 +363,7 @@ struct fscache_object {
int n_obj_ops; /* number of object ops outstanding on object */
int n_in_progress; /* number of ops in progress */
int n_exclusive; /* number of exclusive ops queued */
+ atomic_t n_reads; /* number of read ops in progress */
spinlock_t lock; /* state and operations lock */
unsigned long lookup_jif; /* time at which lookup started */
@@ -358,6 +377,7 @@ struct fscache_object {
#define FSCACHE_OBJECT_EV_RELEASE 4 /* T if netfs requested object release */
#define FSCACHE_OBJECT_EV_RETIRE 5 /* T if netfs requested object retirement */
#define FSCACHE_OBJECT_EV_WITHDRAW 6 /* T if cache requested object withdrawal */
+#define FSCACHE_OBJECT_EVENTS_MASK 0x7f /* mask of all events*/
unsigned long flags;
#define FSCACHE_OBJECT_LOCK 0 /* T if object is busy being processed */
@@ -373,7 +393,11 @@ struct fscache_object {
struct list_head dependents; /* FIFO of dependent objects */
struct list_head dep_link; /* link in parent's dependents list */
struct list_head pending_ops; /* unstarted operations on this object */
+#ifdef CONFIG_FSCACHE_OBJECT_LIST
+ struct rb_node objlist_link; /* link in global object list */
+#endif
pgoff_t store_limit; /* current storage limit */
+ loff_t store_limit_l; /* current storage limit */
};
extern const char *fscache_object_states[];
@@ -383,6 +407,10 @@ extern const char *fscache_object_states[];
(obj)->state >= FSCACHE_OBJECT_AVAILABLE && \
(obj)->state < FSCACHE_OBJECT_DYING)
+#define fscache_object_is_dead(obj) \
+ (test_bit(FSCACHE_IOERROR, &(obj)->cache->flags) && \
+ (obj)->state >= FSCACHE_OBJECT_DYING)
+
extern const struct slow_work_ops fscache_object_slow_work_ops;
/**
@@ -414,6 +442,7 @@ void fscache_object_init(struct fscache_object *object,
object->events = object->event_mask = 0;
object->flags = 0;
object->store_limit = 0;
+ object->store_limit_l = 0;
object->cache = cache;
object->cookie = cookie;
object->parent = NULL;
@@ -422,6 +451,12 @@ void fscache_object_init(struct fscache_object *object,
extern void fscache_object_lookup_negative(struct fscache_object *object);
extern void fscache_obtained_object(struct fscache_object *object);
+#ifdef CONFIG_FSCACHE_OBJECT_LIST
+extern void fscache_object_destroy(struct fscache_object *object);
+#else
+#define fscache_object_destroy(object) do {} while(0)
+#endif
+
/**
* fscache_object_destroyed - Note destruction of an object in a cache
* @cache: The cache from which the object came
@@ -460,6 +495,7 @@ static inline void fscache_object_lookup_error(struct fscache_object *object)
static inline
void fscache_set_store_limit(struct fscache_object *object, loff_t i_size)
{
+ object->store_limit_l = i_size;
object->store_limit = i_size >> PAGE_SHIFT;
if (i_size & ~PAGE_MASK)
object->store_limit++;
diff --git a/include/linux/fscache.h b/include/linux/fscache.h
index 6d8ee466e0a0..595ce49288b7 100644
--- a/include/linux/fscache.h
+++ b/include/linux/fscache.h
@@ -202,6 +202,8 @@ extern int __fscache_write_page(struct fscache_cookie *, struct page *, gfp_t);
extern void __fscache_uncache_page(struct fscache_cookie *, struct page *);
extern bool __fscache_check_page_write(struct fscache_cookie *, struct page *);
extern void __fscache_wait_on_page_write(struct fscache_cookie *, struct page *);
+extern bool __fscache_maybe_release_page(struct fscache_cookie *, struct page *,
+ gfp_t);
/**
* fscache_register_netfs - Register a filesystem as desiring caching services
@@ -615,4 +617,29 @@ void fscache_wait_on_page_write(struct fscache_cookie *cookie,
__fscache_wait_on_page_write(cookie, page);
}
+/**
+ * fscache_maybe_release_page - Consider releasing a page, cancelling a store
+ * @cookie: The cookie representing the cache object
+ * @page: The netfs page that is being cached.
+ * @gfp: The gfp flags passed to releasepage()
+ *
+ * Consider releasing a page for the vmscan algorithm, on behalf of the netfs's
+ * releasepage() call. A storage request on the page may cancelled if it is
+ * not currently being processed.
+ *
+ * The function returns true if the page no longer has a storage request on it,
+ * and false if a storage request is left in place. If true is returned, the
+ * page will have been passed to fscache_uncache_page(). If false is returned
+ * the page cannot be freed yet.
+ */
+static inline
+bool fscache_maybe_release_page(struct fscache_cookie *cookie,
+ struct page *page,
+ gfp_t gfp)
+{
+ if (fscache_cookie_valid(cookie) && PageFsCache(page))
+ return __fscache_maybe_release_page(cookie, page, gfp);
+ return false;
+}
+
#endif /* _LINUX_FSCACHE_H */
diff --git a/include/linux/i2c-pnx.h b/include/linux/i2c-pnx.h
index f13255e06406..9eb07bbc6522 100644
--- a/include/linux/i2c-pnx.h
+++ b/include/linux/i2c-pnx.h
@@ -21,7 +21,7 @@ struct i2c_pnx_mif {
int mode; /* Interface mode */
struct completion complete; /* I/O completion */
struct timer_list timer; /* Timeout */
- char * buf; /* Data buffer */
+ u8 * buf; /* Data buffer */
int len; /* Length of data buffer */
};
diff --git a/include/linux/slow-work.h b/include/linux/slow-work.h
index b65c8881f07a..13337bf6c3f5 100644
--- a/include/linux/slow-work.h
+++ b/include/linux/slow-work.h
@@ -17,13 +17,20 @@
#ifdef CONFIG_SLOW_WORK
#include <linux/sysctl.h>
+#include <linux/timer.h>
struct slow_work;
+#ifdef CONFIG_SLOW_WORK_DEBUG
+struct seq_file;
+#endif
/*
* The operations used to support slow work items
*/
struct slow_work_ops {
+ /* owner */
+ struct module *owner;
+
/* get a ref on a work item
* - return 0 if successful, -ve if not
*/
@@ -34,6 +41,11 @@ struct slow_work_ops {
/* execute a work item */
void (*execute)(struct slow_work *work);
+
+#ifdef CONFIG_SLOW_WORK_DEBUG
+ /* describe a work item for debugfs */
+ void (*desc)(struct slow_work *work, struct seq_file *m);
+#endif
};
/*
@@ -42,13 +54,24 @@ struct slow_work_ops {
* queued
*/
struct slow_work {
+ struct module *owner; /* the owning module */
unsigned long flags;
#define SLOW_WORK_PENDING 0 /* item pending (further) execution */
#define SLOW_WORK_EXECUTING 1 /* item currently executing */
#define SLOW_WORK_ENQ_DEFERRED 2 /* item enqueue deferred */
#define SLOW_WORK_VERY_SLOW 3 /* item is very slow */
+#define SLOW_WORK_CANCELLING 4 /* item is being cancelled, don't enqueue */
+#define SLOW_WORK_DELAYED 5 /* item is struct delayed_slow_work with active timer */
const struct slow_work_ops *ops; /* operations table for this item */
struct list_head link; /* link in queue */
+#ifdef CONFIG_SLOW_WORK_DEBUG
+ struct timespec mark; /* jiffies at which queued or exec begun */
+#endif
+};
+
+struct delayed_slow_work {
+ struct slow_work work;
+ struct timer_list timer;
};
/**
@@ -67,6 +90,20 @@ static inline void slow_work_init(struct slow_work *work,
}
/**
+ * slow_work_init - Initialise a delayed slow work item
+ * @work: The work item to initialise
+ * @ops: The operations to use to handle the slow work item
+ *
+ * Initialise a delayed slow work item.
+ */
+static inline void delayed_slow_work_init(struct delayed_slow_work *dwork,
+ const struct slow_work_ops *ops)
+{
+ init_timer(&dwork->timer);
+ slow_work_init(&dwork->work, ops);
+}
+
+/**
* vslow_work_init - Initialise a very slow work item
* @work: The work item to initialise
* @ops: The operations to use to handle the slow work item
@@ -83,9 +120,40 @@ static inline void vslow_work_init(struct slow_work *work,
INIT_LIST_HEAD(&work->link);
}
+/**
+ * slow_work_is_queued - Determine if a slow work item is on the work queue
+ * work: The work item to test
+ *
+ * Determine if the specified slow-work item is on the work queue. This
+ * returns true if it is actually on the queue.
+ *
+ * If the item is executing and has been marked for requeue when execution
+ * finishes, then false will be returned.
+ *
+ * Anyone wishing to wait for completion of execution can wait on the
+ * SLOW_WORK_EXECUTING bit.
+ */
+static inline bool slow_work_is_queued(struct slow_work *work)
+{
+ unsigned long flags = work->flags;
+ return flags & SLOW_WORK_PENDING && !(flags & SLOW_WORK_EXECUTING);
+}
+
extern int slow_work_enqueue(struct slow_work *work);
-extern int slow_work_register_user(void);
-extern void slow_work_unregister_user(void);
+extern void slow_work_cancel(struct slow_work *work);
+extern int slow_work_register_user(struct module *owner);
+extern void slow_work_unregister_user(struct module *owner);
+
+extern int delayed_slow_work_enqueue(struct delayed_slow_work *dwork,
+ unsigned long delay);
+
+static inline void delayed_slow_work_cancel(struct delayed_slow_work *dwork)
+{
+ slow_work_cancel(&dwork->work);
+}
+
+extern bool slow_work_sleep_till_thread_needed(struct slow_work *work,
+ signed long *_timeout);
#ifdef CONFIG_SYSCTL
extern ctl_table slow_work_sysctls[];
diff --git a/include/linux/vt.h b/include/linux/vt.h
index 7afca0d72139..7ffa11f06232 100644
--- a/include/linux/vt.h
+++ b/include/linux/vt.h
@@ -70,8 +70,8 @@ struct vt_event {
#define VT_EVENT_UNBLANK 0x0004 /* Screen unblank */
#define VT_EVENT_RESIZE 0x0008 /* Resize display */
#define VT_MAX_EVENT 0x000F
- unsigned int old; /* Old console */
- unsigned int new; /* New console (if changing) */
+ unsigned int oldev; /* Old console */
+ unsigned int newev; /* New console (if changing) */
unsigned int pad[4]; /* Padding for expansion */
};
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-18 17:18:53 +0300