Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2: (22 commits)
  nilfs2: support contiguous lookup of blocks
  nilfs2: add sync_page method to page caches of meta data
  nilfs2: use device's backing_dev_info for btree node caches
  nilfs2: return EBUSY against delete request on snapshot
  nilfs2: modify list of unsupported features in caveats
  nilfs2: enable sync_page method
  nilfs2: set bio unplug flag for the last bio in segment
  nilfs2: allow future expansion of metadata read out via get info ioctl
  NILFS2: Pagecache usage optimization on NILFS2
  nilfs2: remove nilfs_btree_operations from btree mapping
  nilfs2: remove nilfs_direct_operations from direct mapping
  nilfs2: remove bmap pointer operations
  nilfs2: remove useless b_low and b_high fields from nilfs_bmap struct
  nilfs2: remove pointless NULL check of bpop_commit_alloc_ptr function
  nilfs2: move get block functions in bmap.c into btree codes
  nilfs2: remove nilfs_bmap_delete_block
  nilfs2: remove nilfs_bmap_put_block
  nilfs2: remove header file for segment list operations
  nilfs2: eliminate removal list of segments
  nilfs2: add sufile function that can modify multiple segment usages
  ...

1 files changed, 69 insertions, 70 deletions

diff --git a/fs/nilfs2/direct.c b/fs/nilfs2/direct.c
index c6379e482781..342d9765df8d 100644
--- a/fs/nilfs2/direct.c
+++ b/fs/nilfs2/direct.c
@@ -25,6 +25,7 @@
 #include "page.h"
 #include "direct.h"
 #include "alloc.h"
+#include "dat.h"
 
 static inline __le64 *nilfs_direct_dptrs(const struct nilfs_direct *direct)
 {
@@ -62,6 +63,47 @@ static int nilfs_direct_lookup(const struct nilfs_bmap *bmap,
 	return 0;
 }
 
+static int nilfs_direct_lookup_contig(const struct nilfs_bmap *bmap,
+				      __u64 key, __u64 *ptrp,
+				      unsigned maxblocks)
+{
+	struct nilfs_direct *direct = (struct nilfs_direct *)bmap;
+	struct inode *dat = NULL;
+	__u64 ptr, ptr2;
+	sector_t blocknr;
+	int ret, cnt;
+
+	if (key > NILFS_DIRECT_KEY_MAX ||
+	    (ptr = nilfs_direct_get_ptr(direct, key)) ==
+	    NILFS_BMAP_INVALID_PTR)
+		return -ENOENT;
+
+	if (NILFS_BMAP_USE_VBN(bmap)) {
+		dat = nilfs_bmap_get_dat(bmap);
+		ret = nilfs_dat_translate(dat, ptr, &blocknr);
+		if (ret < 0)
+			return ret;
+		ptr = blocknr;
+	}
+
+	maxblocks = min_t(unsigned, maxblocks, NILFS_DIRECT_KEY_MAX - key + 1);
+	for (cnt = 1; cnt < maxblocks &&
+		     (ptr2 = nilfs_direct_get_ptr(direct, key + cnt)) !=
+		     NILFS_BMAP_INVALID_PTR;
+	     cnt++) {
+		if (dat) {
+			ret = nilfs_dat_translate(dat, ptr2, &blocknr);
+			if (ret < 0)
+				return ret;
+			ptr2 = blocknr;
+		}
+		if (ptr2 != ptr + cnt)
+			break;
+	}
+	*ptrp = ptr;
+	return cnt;
+}
+
 static __u64
 nilfs_direct_find_target_v(const struct nilfs_direct *direct, __u64 key)
 {
@@ -90,10 +132,9 @@ static int nilfs_direct_prepare_insert(struct nilfs_direct *direct,
 {
 	int ret;
 
-	if (direct->d_ops->dop_find_target != NULL)
-		req->bpr_ptr = direct->d_ops->dop_find_target(direct, key);
-	ret = direct->d_bmap.b_pops->bpop_prepare_alloc_ptr(&direct->d_bmap,
-							       req);
+	if (NILFS_BMAP_USE_VBN(&direct->d_bmap))
+		req->bpr_ptr = nilfs_direct_find_target_v(direct, key);
+	ret = nilfs_bmap_prepare_alloc_ptr(&direct->d_bmap, req);
 	if (ret < 0)
 		return ret;
 
@@ -111,16 +152,14 @@ static void nilfs_direct_commit_insert(struct nilfs_direct *direct,
 	bh = (struct buffer_head *)((unsigned long)ptr);
 	set_buffer_nilfs_volatile(bh);
 
-	if (direct->d_bmap.b_pops->bpop_commit_alloc_ptr != NULL)
-		direct->d_bmap.b_pops->bpop_commit_alloc_ptr(
-			&direct->d_bmap, req);
+	nilfs_bmap_commit_alloc_ptr(&direct->d_bmap, req);
 	nilfs_direct_set_ptr(direct, key, req->bpr_ptr);
 
 	if (!nilfs_bmap_dirty(&direct->d_bmap))
 		nilfs_bmap_set_dirty(&direct->d_bmap);
 
-	if (direct->d_ops->dop_set_target != NULL)
-		direct->d_ops->dop_set_target(direct, key, req->bpr_ptr);
+	if (NILFS_BMAP_USE_VBN(&direct->d_bmap))
+		nilfs_direct_set_target_v(direct, key, req->bpr_ptr);
 }
 
 static int nilfs_direct_insert(struct nilfs_bmap *bmap, __u64 key, __u64 ptr)
@@ -152,25 +191,18 @@ static int nilfs_direct_prepare_delete(struct nilfs_direct *direct,
 {
 	int ret;
 
-	if (direct->d_bmap.b_pops->bpop_prepare_end_ptr != NULL) {
-		req->bpr_ptr = nilfs_direct_get_ptr(direct, key);
-		ret = direct->d_bmap.b_pops->bpop_prepare_end_ptr(
-			&direct->d_bmap, req);
-		if (ret < 0)
-			return ret;
-	}
-
-	stats->bs_nblocks = 1;
-	return 0;
+	req->bpr_ptr = nilfs_direct_get_ptr(direct, key);
+	ret = nilfs_bmap_prepare_end_ptr(&direct->d_bmap, req);
+	if (!ret)
+		stats->bs_nblocks = 1;
+	return ret;
 }
 
 static void nilfs_direct_commit_delete(struct nilfs_direct *direct,
 				       union nilfs_bmap_ptr_req *req,
 				       __u64 key)
 {
-	if (direct->d_bmap.b_pops->bpop_commit_end_ptr != NULL)
-		direct->d_bmap.b_pops->bpop_commit_end_ptr(
-			&direct->d_bmap, req);
+	nilfs_bmap_commit_end_ptr(&direct->d_bmap, req);
 	nilfs_direct_set_ptr(direct, key, NILFS_BMAP_INVALID_PTR);
 }
 
@@ -244,8 +276,7 @@ static int nilfs_direct_gather_data(struct nilfs_bmap *bmap,
 }
 
 int nilfs_direct_delete_and_convert(struct nilfs_bmap *bmap,
-				    __u64 key, __u64 *keys, __u64 *ptrs,
-				    int n, __u64 low, __u64 high)
+				    __u64 key, __u64 *keys, __u64 *ptrs, int n)
 {
 	struct nilfs_direct *direct;
 	__le64 *dptrs;
@@ -275,8 +306,7 @@ int nilfs_direct_delete_and_convert(struct nilfs_bmap *bmap,
 			dptrs[i] = NILFS_BMAP_INVALID_PTR;
 	}
 
-	nilfs_direct_init(bmap, low, high);
-
+	nilfs_direct_init(bmap);
 	return 0;
 }
 
@@ -293,11 +323,11 @@ static int nilfs_direct_propagate_v(struct nilfs_direct *direct,
 	if (!buffer_nilfs_volatile(bh)) {
 		oldreq.bpr_ptr = ptr;
 		newreq.bpr_ptr = ptr;
-		ret = nilfs_bmap_prepare_update(&direct->d_bmap, &oldreq,
-						&newreq);
+		ret = nilfs_bmap_prepare_update_v(&direct->d_bmap, &oldreq,
+						  &newreq);
 		if (ret < 0)
 			return ret;
-		nilfs_bmap_commit_update(&direct->d_bmap, &oldreq, &newreq);
+		nilfs_bmap_commit_update_v(&direct->d_bmap, &oldreq, &newreq);
 		set_buffer_nilfs_volatile(bh);
 		nilfs_direct_set_ptr(direct, key, newreq.bpr_ptr);
 	} else
@@ -309,12 +339,10 @@ static int nilfs_direct_propagate_v(struct nilfs_direct *direct,
 static int nilfs_direct_propagate(const struct nilfs_bmap *bmap,
 				  struct buffer_head *bh)
 {
-	struct nilfs_direct *direct;
+	struct nilfs_direct *direct = (struct nilfs_direct *)bmap;
 
-	direct = (struct nilfs_direct *)bmap;
-	return (direct->d_ops->dop_propagate != NULL) ?
-		direct->d_ops->dop_propagate(direct, bh) :
-		0;
+	return NILFS_BMAP_USE_VBN(bmap) ?
+		nilfs_direct_propagate_v(direct, bh) : 0;
 }
 
 static int nilfs_direct_assign_v(struct nilfs_direct *direct,
@@ -327,12 +355,9 @@ static int nilfs_direct_assign_v(struct nilfs_direct *direct,
 	int ret;
 
 	req.bpr_ptr = ptr;
-	ret = direct->d_bmap.b_pops->bpop_prepare_start_ptr(
-		&direct->d_bmap, &req);
-	if (ret < 0)
+	ret = nilfs_bmap_start_v(&direct->d_bmap, &req, blocknr);
+	if (unlikely(ret < 0))
 		return ret;
-	direct->d_bmap.b_pops->bpop_commit_start_ptr(&direct->d_bmap,
-						     &req, blocknr);
 
 	binfo->bi_v.bi_vblocknr = nilfs_bmap_ptr_to_dptr(ptr);
 	binfo->bi_v.bi_blkoff = nilfs_bmap_key_to_dkey(key);
@@ -377,12 +402,14 @@ static int nilfs_direct_assign(struct nilfs_bmap *bmap,
 		return -EINVAL;
 	}
 
-	return direct->d_ops->dop_assign(direct, key, ptr, bh,
-					 blocknr, binfo);
+	return NILFS_BMAP_USE_VBN(bmap) ?
+		nilfs_direct_assign_v(direct, key, ptr, bh, blocknr, binfo) :
+		nilfs_direct_assign_p(direct, key, ptr, bh, blocknr, binfo);
 }
 
 static const struct nilfs_bmap_operations nilfs_direct_ops = {
 	.bop_lookup		=	nilfs_direct_lookup,
+	.bop_lookup_contig	=	nilfs_direct_lookup_contig,
 	.bop_insert		=	nilfs_direct_insert,
 	.bop_delete		=	nilfs_direct_delete,
 	.bop_clear		=	NULL,
@@ -401,36 +428,8 @@ static const struct nilfs_bmap_operations nilfs_direct_ops = {
 };
 
 
-static const struct nilfs_direct_operations nilfs_direct_ops_v = {
-	.dop_find_target	=	nilfs_direct_find_target_v,
-	.dop_set_target		=	nilfs_direct_set_target_v,
-	.dop_propagate		=	nilfs_direct_propagate_v,
-	.dop_assign		=	nilfs_direct_assign_v,
-};
-
-static const struct nilfs_direct_operations nilfs_direct_ops_p = {
-	.dop_find_target	=	NULL,
-	.dop_set_target		=	NULL,
-	.dop_propagate		=	NULL,
-	.dop_assign		=	nilfs_direct_assign_p,
-};
-
-int nilfs_direct_init(struct nilfs_bmap *bmap, __u64 low, __u64 high)
+int nilfs_direct_init(struct nilfs_bmap *bmap)
 {
-	struct nilfs_direct *direct;
-
-	direct = (struct nilfs_direct *)bmap;
 	bmap->b_ops = &nilfs_direct_ops;
-	bmap->b_low = low;
-	bmap->b_high = high;
-	switch (bmap->b_inode->i_ino) {
-	case NILFS_DAT_INO:
-		direct->d_ops = &nilfs_direct_ops_p;
-		break;
-	default:
-		direct->d_ops = &nilfs_direct_ops_v;
-		break;
-	}
-
 	return 0;
 }