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authorTejun Heo <tj@kernel.org>2015-05-22 17:13:32 -0400
committerJens Axboe <axboe@fb.com>2015-06-02 08:33:34 -0600
commit66114cad64bf76a155fec1f0fff0de771cf909d5 (patch)
tree58d7b8646add87cb40973961757a1c3598f3ee4c
parent4610007142823307d930ac890d822633a05ce08c (diff)
downloadlinux-66114cad64bf76a155fec1f0fff0de771cf909d5.tar.bz2
writeback: separate out include/linux/backing-dev-defs.h
With the planned cgroup writeback support, backing-dev related declarations will be more widely used across block and cgroup; unfortunately, including backing-dev.h from include/linux/blkdev.h makes cyclic include dependency quite likely. This patch separates out backing-dev-defs.h which only has the essential definitions and updates blkdev.h to include it. c files which need access to more backing-dev details now include backing-dev.h directly. This takes backing-dev.h off the common include dependency chain making it a lot easier to use it across block and cgroup. v2: fs/fat build failure fixed. Signed-off-by: Tejun Heo <tj@kernel.org> Reviewed-by: Jan Kara <jack@suse.cz> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by: Jens Axboe <axboe@fb.com>
-rw-r--r--block/blk-integrity.c1
-rw-r--r--block/blk-sysfs.c1
-rw-r--r--block/bounce.c1
-rw-r--r--block/genhd.c1
-rw-r--r--drivers/block/drbd/drbd_int.h1
-rw-r--r--drivers/block/pktcdvd.c1
-rw-r--r--drivers/char/raw.c1
-rw-r--r--drivers/md/bcache/request.c1
-rw-r--r--drivers/md/dm.h1
-rw-r--r--drivers/md/md.h1
-rw-r--r--drivers/mtd/devices/block2mtd.c1
-rw-r--r--fs/block_dev.c1
-rw-r--r--fs/ext4/extents.c1
-rw-r--r--fs/ext4/mballoc.c1
-rw-r--r--fs/ext4/super.c1
-rw-r--r--fs/f2fs/segment.h1
-rw-r--r--fs/fat/file.c1
-rw-r--r--fs/fat/inode.c1
-rw-r--r--fs/hfs/super.c1
-rw-r--r--fs/hfsplus/super.c1
-rw-r--r--fs/nfs/filelayout/filelayout.c1
-rw-r--r--fs/ocfs2/file.c1
-rw-r--r--fs/reiserfs/super.c1
-rw-r--r--fs/ufs/super.c1
-rw-r--r--fs/xfs/xfs_file.c1
-rw-r--r--include/linux/backing-dev-defs.h106
-rw-r--r--include/linux/backing-dev.h102
-rw-r--r--include/linux/blkdev.h2
-rw-r--r--mm/madvise.c1
29 files changed, 134 insertions, 102 deletions
diff --git a/block/blk-integrity.c b/block/blk-integrity.c
index 79ffb4855af0..f548b64be092 100644
--- a/block/blk-integrity.c
+++ b/block/blk-integrity.c
@@ -21,6 +21,7 @@
*/
#include <linux/blkdev.h>
+#include <linux/backing-dev.h>
#include <linux/mempool.h>
#include <linux/bio.h>
#include <linux/scatterlist.h>
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index 5677eb78557d..1b60941dc4c6 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -6,6 +6,7 @@
#include <linux/module.h>
#include <linux/bio.h>
#include <linux/blkdev.h>
+#include <linux/backing-dev.h>
#include <linux/blktrace_api.h>
#include <linux/blk-mq.h>
#include <linux/blk-cgroup.h>
diff --git a/block/bounce.c b/block/bounce.c
index 4bac72579c1f..072280b3dd13 100644
--- a/block/bounce.c
+++ b/block/bounce.c
@@ -13,6 +13,7 @@
#include <linux/pagemap.h>
#include <linux/mempool.h>
#include <linux/blkdev.h>
+#include <linux/backing-dev.h>
#include <linux/init.h>
#include <linux/hash.h>
#include <linux/highmem.h>
diff --git a/block/genhd.c b/block/genhd.c
index 0a536dc05f3b..d46ba566d62f 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -8,6 +8,7 @@
#include <linux/kdev_t.h>
#include <linux/kernel.h>
#include <linux/blkdev.h>
+#include <linux/backing-dev.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/proc_fs.h>
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index b905e9888b88..efd19c2da9c2 100644
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -38,6 +38,7 @@
#include <linux/mutex.h>
#include <linux/major.h>
#include <linux/blkdev.h>
+#include <linux/backing-dev.h>
#include <linux/genhd.h>
#include <linux/idr.h>
#include <net/tcp.h>
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index 09e628dafd9d..4c20c228184c 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -61,6 +61,7 @@
#include <linux/freezer.h>
#include <linux/mutex.h>
#include <linux/slab.h>
+#include <linux/backing-dev.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_ioctl.h>
#include <scsi/scsi.h>
diff --git a/drivers/char/raw.c b/drivers/char/raw.c
index 5fc291c6157e..60316fbaf295 100644
--- a/drivers/char/raw.c
+++ b/drivers/char/raw.c
@@ -12,6 +12,7 @@
#include <linux/fs.h>
#include <linux/major.h>
#include <linux/blkdev.h>
+#include <linux/backing-dev.h>
#include <linux/module.h>
#include <linux/raw.h>
#include <linux/capability.h>
diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c
index 1616f668a4cb..4afb2d26b148 100644
--- a/drivers/md/bcache/request.c
+++ b/drivers/md/bcache/request.c
@@ -15,6 +15,7 @@
#include <linux/module.h>
#include <linux/hash.h>
#include <linux/random.h>
+#include <linux/backing-dev.h>
#include <trace/events/bcache.h>
diff --git a/drivers/md/dm.h b/drivers/md/dm.h
index e6e66d087b26..7fff744f0865 100644
--- a/drivers/md/dm.h
+++ b/drivers/md/dm.h
@@ -14,6 +14,7 @@
#include <linux/device-mapper.h>
#include <linux/list.h>
#include <linux/blkdev.h>
+#include <linux/backing-dev.h>
#include <linux/hdreg.h>
#include <linux/completion.h>
#include <linux/kobject.h>
diff --git a/drivers/md/md.h b/drivers/md/md.h
index 4046a6c6f223..7da6e9c3cb53 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -16,6 +16,7 @@
#define _MD_MD_H
#include <linux/blkdev.h>
+#include <linux/backing-dev.h>
#include <linux/kobject.h>
#include <linux/list.h>
#include <linux/mm.h>
diff --git a/drivers/mtd/devices/block2mtd.c b/drivers/mtd/devices/block2mtd.c
index b16f3cda97ff..e2c0057737e6 100644
--- a/drivers/mtd/devices/block2mtd.c
+++ b/drivers/mtd/devices/block2mtd.c
@@ -20,6 +20,7 @@
#include <linux/delay.h>
#include <linux/fs.h>
#include <linux/blkdev.h>
+#include <linux/backing-dev.h>
#include <linux/bio.h>
#include <linux/pagemap.h>
#include <linux/list.h>
diff --git a/fs/block_dev.c b/fs/block_dev.c
index c7e4163ede87..e545cbfbe5b2 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -14,6 +14,7 @@
#include <linux/device_cgroup.h>
#include <linux/highmem.h>
#include <linux/blkdev.h>
+#include <linux/backing-dev.h>
#include <linux/module.h>
#include <linux/blkpg.h>
#include <linux/magic.h>
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index d74e08029643..e8b5866ffa07 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -39,6 +39,7 @@
#include <linux/slab.h>
#include <asm/uaccess.h>
#include <linux/fiemap.h>
+#include <linux/backing-dev.h>
#include "ext4_jbd2.h"
#include "ext4_extents.h"
#include "xattr.h"
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 8d1e60214ef0..440987c8ba9e 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -26,6 +26,7 @@
#include <linux/log2.h>
#include <linux/module.h>
#include <linux/slab.h>
+#include <linux/backing-dev.h>
#include <trace/events/ext4.h>
#ifdef CONFIG_EXT4_DEBUG
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index f06d0589ddba..56b8bb75c3fc 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -24,6 +24,7 @@
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/blkdev.h>
+#include <linux/backing-dev.h>
#include <linux/parser.h>
#include <linux/buffer_head.h>
#include <linux/exportfs.h>
diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
index 6408989857e0..aba72f7a8ac4 100644
--- a/fs/f2fs/segment.h
+++ b/fs/f2fs/segment.h
@@ -9,6 +9,7 @@
* published by the Free Software Foundation.
*/
#include <linux/blkdev.h>
+#include <linux/backing-dev.h>
/* constant macro */
#define NULL_SEGNO ((unsigned int)(~0))
diff --git a/fs/fat/file.c b/fs/fat/file.c
index 442d50a0e33e..a08f1039909a 100644
--- a/fs/fat/file.c
+++ b/fs/fat/file.c
@@ -11,6 +11,7 @@
#include <linux/compat.h>
#include <linux/mount.h>
#include <linux/blkdev.h>
+#include <linux/backing-dev.h>
#include <linux/fsnotify.h>
#include <linux/security.h>
#include "fat.h"
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index c06774658345..509411dd3698 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -18,6 +18,7 @@
#include <linux/parser.h>
#include <linux/uio.h>
#include <linux/blkdev.h>
+#include <linux/backing-dev.h>
#include <asm/unaligned.h>
#include "fat.h"
diff --git a/fs/hfs/super.c b/fs/hfs/super.c
index eee7206c38d1..55c03b9e9070 100644
--- a/fs/hfs/super.c
+++ b/fs/hfs/super.c
@@ -14,6 +14,7 @@
#include <linux/module.h>
#include <linux/blkdev.h>
+#include <linux/backing-dev.h>
#include <linux/mount.h>
#include <linux/init.h>
#include <linux/nls.h>
diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c
index 593af2fdcc2d..7302d96ae8bf 100644
--- a/fs/hfsplus/super.c
+++ b/fs/hfsplus/super.c
@@ -11,6 +11,7 @@
#include <linux/init.h>
#include <linux/pagemap.h>
#include <linux/blkdev.h>
+#include <linux/backing-dev.h>
#include <linux/fs.h>
#include <linux/slab.h>
#include <linux/vfs.h>
diff --git a/fs/nfs/filelayout/filelayout.c b/fs/nfs/filelayout/filelayout.c
index a46bf6de9ce4..b34f2e228601 100644
--- a/fs/nfs/filelayout/filelayout.c
+++ b/fs/nfs/filelayout/filelayout.c
@@ -32,6 +32,7 @@
#include <linux/nfs_fs.h>
#include <linux/nfs_page.h>
#include <linux/module.h>
+#include <linux/backing-dev.h>
#include <linux/sunrpc/metrics.h>
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index d8b670cbd909..8f1feca89fb0 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -37,6 +37,7 @@
#include <linux/falloc.h>
#include <linux/quotaops.h>
#include <linux/blkdev.h>
+#include <linux/backing-dev.h>
#include <cluster/masklog.h>
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index 0111ad0466ed..3e0af317fcc3 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -21,6 +21,7 @@
#include "xattr.h"
#include <linux/init.h>
#include <linux/blkdev.h>
+#include <linux/backing-dev.h>
#include <linux/buffer_head.h>
#include <linux/exportfs.h>
#include <linux/quotaops.h>
diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index b3bc3e7ae79d..098508a93c7b 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -80,6 +80,7 @@
#include <linux/stat.h>
#include <linux/string.h>
#include <linux/blkdev.h>
+#include <linux/backing-dev.h>
#include <linux/init.h>
#include <linux/parser.h>
#include <linux/buffer_head.h>
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 8121e75352ee..4e00b38efbe0 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -41,6 +41,7 @@
#include <linux/dcache.h>
#include <linux/falloc.h>
#include <linux/pagevec.h>
+#include <linux/backing-dev.h>
static const struct vm_operations_struct xfs_file_vm_ops;
diff --git a/include/linux/backing-dev-defs.h b/include/linux/backing-dev-defs.h
new file mode 100644
index 000000000000..aa18c4bd43c1
--- /dev/null
+++ b/include/linux/backing-dev-defs.h
@@ -0,0 +1,106 @@
+#ifndef __LINUX_BACKING_DEV_DEFS_H
+#define __LINUX_BACKING_DEV_DEFS_H
+
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <linux/percpu_counter.h>
+#include <linux/flex_proportions.h>
+#include <linux/timer.h>
+#include <linux/workqueue.h>
+
+struct page;
+struct device;
+struct dentry;
+
+/*
+ * Bits in bdi_writeback.state
+ */
+enum wb_state {
+ WB_async_congested, /* The async (write) queue is getting full */
+ WB_sync_congested, /* The sync queue is getting full */
+ WB_registered, /* bdi_register() was done */
+ WB_writeback_running, /* Writeback is in progress */
+};
+
+typedef int (congested_fn)(void *, int);
+
+enum wb_stat_item {
+ WB_RECLAIMABLE,
+ WB_WRITEBACK,
+ WB_DIRTIED,
+ WB_WRITTEN,
+ NR_WB_STAT_ITEMS
+};
+
+#define WB_STAT_BATCH (8*(1+ilog2(nr_cpu_ids)))
+
+struct bdi_writeback {
+ struct backing_dev_info *bdi; /* our parent bdi */
+
+ unsigned long state; /* Always use atomic bitops on this */
+ unsigned long last_old_flush; /* last old data flush */
+
+ struct list_head b_dirty; /* dirty inodes */
+ struct list_head b_io; /* parked for writeback */
+ struct list_head b_more_io; /* parked for more writeback */
+ struct list_head b_dirty_time; /* time stamps are dirty */
+ spinlock_t list_lock; /* protects the b_* lists */
+
+ struct percpu_counter stat[NR_WB_STAT_ITEMS];
+
+ unsigned long bw_time_stamp; /* last time write bw is updated */
+ unsigned long dirtied_stamp;
+ unsigned long written_stamp; /* pages written at bw_time_stamp */
+ unsigned long write_bandwidth; /* the estimated write bandwidth */
+ unsigned long avg_write_bandwidth; /* further smoothed write bw */
+
+ /*
+ * The base dirty throttle rate, re-calculated on every 200ms.
+ * All the bdi tasks' dirty rate will be curbed under it.
+ * @dirty_ratelimit tracks the estimated @balanced_dirty_ratelimit
+ * in small steps and is much more smooth/stable than the latter.
+ */
+ unsigned long dirty_ratelimit;
+ unsigned long balanced_dirty_ratelimit;
+
+ struct fprop_local_percpu completions;
+ int dirty_exceeded;
+
+ spinlock_t work_lock; /* protects work_list & dwork scheduling */
+ struct list_head work_list;
+ struct delayed_work dwork; /* work item used for writeback */
+};
+
+struct backing_dev_info {
+ struct list_head bdi_list;
+ unsigned long ra_pages; /* max readahead in PAGE_CACHE_SIZE units */
+ unsigned int capabilities; /* Device capabilities */
+ congested_fn *congested_fn; /* Function pointer if device is md/dm */
+ void *congested_data; /* Pointer to aux data for congested func */
+
+ char *name;
+
+ unsigned int min_ratio;
+ unsigned int max_ratio, max_prop_frac;
+
+ struct bdi_writeback wb; /* default writeback info for this bdi */
+
+ struct device *dev;
+
+ struct timer_list laptop_mode_wb_timer;
+
+#ifdef CONFIG_DEBUG_FS
+ struct dentry *debug_dir;
+ struct dentry *debug_stats;
+#endif
+};
+
+enum {
+ BLK_RW_ASYNC = 0,
+ BLK_RW_SYNC = 1,
+};
+
+void clear_bdi_congested(struct backing_dev_info *bdi, int sync);
+void set_bdi_congested(struct backing_dev_info *bdi, int sync);
+
+#endif /* __LINUX_BACKING_DEV_DEFS_H */
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h
index d796f49ce87a..5e39f7a8efed 100644
--- a/include/linux/backing-dev.h
+++ b/include/linux/backing-dev.h
@@ -8,104 +8,11 @@
#ifndef _LINUX_BACKING_DEV_H
#define _LINUX_BACKING_DEV_H
-#include <linux/percpu_counter.h>
-#include <linux/log2.h>
-#include <linux/flex_proportions.h>
#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/sched.h>
-#include <linux/timer.h>
#include <linux/writeback.h>
-#include <linux/atomic.h>
-#include <linux/sysctl.h>
-#include <linux/workqueue.h>
-
-struct page;
-struct device;
-struct dentry;
-
-/*
- * Bits in bdi_writeback.state
- */
-enum wb_state {
- WB_async_congested, /* The async (write) queue is getting full */
- WB_sync_congested, /* The sync queue is getting full */
- WB_registered, /* bdi_register() was done */
- WB_writeback_running, /* Writeback is in progress */
-};
-
-typedef int (congested_fn)(void *, int);
-
-enum wb_stat_item {
- WB_RECLAIMABLE,
- WB_WRITEBACK,
- WB_DIRTIED,
- WB_WRITTEN,
- NR_WB_STAT_ITEMS
-};
-
-#define WB_STAT_BATCH (8*(1+ilog2(nr_cpu_ids)))
-
-struct bdi_writeback {
- struct backing_dev_info *bdi; /* our parent bdi */
-
- unsigned long state; /* Always use atomic bitops on this */
- unsigned long last_old_flush; /* last old data flush */
-
- struct list_head b_dirty; /* dirty inodes */
- struct list_head b_io; /* parked for writeback */
- struct list_head b_more_io; /* parked for more writeback */
- struct list_head b_dirty_time; /* time stamps are dirty */
- spinlock_t list_lock; /* protects the b_* lists */
-
- struct percpu_counter stat[NR_WB_STAT_ITEMS];
-
- unsigned long bw_time_stamp; /* last time write bw is updated */
- unsigned long dirtied_stamp;
- unsigned long written_stamp; /* pages written at bw_time_stamp */
- unsigned long write_bandwidth; /* the estimated write bandwidth */
- unsigned long avg_write_bandwidth; /* further smoothed write bw */
-
- /*
- * The base dirty throttle rate, re-calculated on every 200ms.
- * All the bdi tasks' dirty rate will be curbed under it.
- * @dirty_ratelimit tracks the estimated @balanced_dirty_ratelimit
- * in small steps and is much more smooth/stable than the latter.
- */
- unsigned long dirty_ratelimit;
- unsigned long balanced_dirty_ratelimit;
-
- struct fprop_local_percpu completions;
- int dirty_exceeded;
-
- spinlock_t work_lock; /* protects work_list & dwork scheduling */
- struct list_head work_list;
- struct delayed_work dwork; /* work item used for writeback */
-};
-
-struct backing_dev_info {
- struct list_head bdi_list;
- unsigned long ra_pages; /* max readahead in PAGE_CACHE_SIZE units */
- unsigned int capabilities; /* Device capabilities */
- congested_fn *congested_fn; /* Function pointer if device is md/dm */
- void *congested_data; /* Pointer to aux data for congested func */
-
- char *name;
-
- unsigned int min_ratio;
- unsigned int max_ratio, max_prop_frac;
-
- struct bdi_writeback wb; /* default writeback info for this bdi */
-
- struct device *dev;
-
- struct timer_list laptop_mode_wb_timer;
-
-#ifdef CONFIG_DEBUG_FS
- struct dentry *debug_dir;
- struct dentry *debug_stats;
-#endif
-};
+#include <linux/backing-dev-defs.h>
struct backing_dev_info *inode_to_bdi(struct inode *inode);
@@ -265,13 +172,6 @@ static inline int bdi_rw_congested(struct backing_dev_info *bdi)
(1 << WB_async_congested));
}
-enum {
- BLK_RW_ASYNC = 0,
- BLK_RW_SYNC = 1,
-};
-
-void clear_bdi_congested(struct backing_dev_info *bdi, int sync);
-void set_bdi_congested(struct backing_dev_info *bdi, int sync);
long congestion_wait(int sync, long timeout);
long wait_iff_congested(struct zone *zone, int sync, long timeout);
int pdflush_proc_obsolete(struct ctl_table *table, int write,
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index ccaa9aecd593..60d2726a6b62 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -12,7 +12,7 @@
#include <linux/timer.h>
#include <linux/workqueue.h>
#include <linux/pagemap.h>
-#include <linux/backing-dev.h>
+#include <linux/backing-dev-defs.h>
#include <linux/wait.h>
#include <linux/mempool.h>
#include <linux/bio.h>
diff --git a/mm/madvise.c b/mm/madvise.c
index d551475517bf..64bb8a22110c 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -17,6 +17,7 @@
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/blkdev.h>
+#include <linux/backing-dev.h>
#include <linux/swap.h>
#include <linux/swapops.h>