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Message-ID: <20070624014731.GD17609@wotan.suse.de>
Date: Sun, 24 Jun 2007 03:47:31 +0200
From: Nick Piggin <npiggin@...e.de>
To: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Linux Memory Management List <linux-mm@...ck.org>,
linux-fsdevel@...r.kernel.org
Subject: [patch 3/3] minix: convert to fsblock
Convert minix from buffer head to fsblock.
---
fs/minix/bitmap.c | 148 +++++++++++++++++++++----------
fs/minix/file.c | 6 -
fs/minix/inode.c | 172 ++++++++++++++++++++++--------------
fs/minix/itree_common.c | 227 ++++++++++++++++++++++++++++++++----------------
fs/minix/itree_v1.c | 7 -
fs/minix/itree_v2.c | 7 -
fs/minix/minix.h | 17 ++-
7 files changed, 382 insertions(+), 202 deletions(-)
Index: linux-2.6/fs/minix/minix.h
===================================================================
--- linux-2.6.orig/fs/minix/minix.h
+++ linux-2.6/fs/minix/minix.h
@@ -1,4 +1,5 @@
#include <linux/fs.h>
+#include <linux/fsblock.h>
#include <linux/pagemap.h>
#include <linux/minix_fs.h>
@@ -37,16 +38,18 @@ struct minix_sb_info {
int s_dirsize;
int s_namelen;
int s_link_max;
- struct buffer_head ** s_imap;
- struct buffer_head ** s_zmap;
- struct buffer_head * s_sbh;
+ struct fsblock_meta ** s_imap;
+ struct fsblock_meta ** s_zmap;
+ struct fsblock_meta * s_smblock;
struct minix_super_block * s_ms;
unsigned short s_mount_state;
unsigned short s_version;
};
-extern struct minix_inode * minix_V1_raw_inode(struct super_block *, ino_t, struct buffer_head **);
-extern struct minix2_inode * minix_V2_raw_inode(struct super_block *, ino_t, struct buffer_head **);
+extern struct minix_inode * minix_V1_raw_inode(struct super_block *, ino_t, struct fsblock_meta **);
+extern void minix_put_raw_inode(struct super_block *sb, ino_t ino, struct fsblock_meta *mblock, struct minix_inode *p);
+extern struct minix2_inode * minix_V2_raw_inode(struct super_block *, ino_t, struct fsblock_meta **);
+extern void minix2_put_raw_inode(struct super_block *sb, ino_t ino, struct fsblock_meta *mblock, struct minix2_inode *p);
extern struct inode * minix_new_inode(const struct inode * dir, int * error);
extern void minix_free_inode(struct inode * inode);
extern unsigned long minix_count_free_inodes(struct minix_sb_info *sbi);
@@ -60,8 +63,8 @@ extern void V2_minix_truncate(struct ino
extern void minix_truncate(struct inode *);
extern int minix_sync_inode(struct inode *);
extern void minix_set_inode(struct inode *, dev_t);
-extern int V1_minix_get_block(struct inode *, long, struct buffer_head *, int);
-extern int V2_minix_get_block(struct inode *, long, struct buffer_head *, int);
+extern int V1_minix_insert_mapping(struct address_space *, loff_t, size_t, int);
+extern int V2_minix_insert_mapping(struct address_space *, loff_t, size_t, int);
extern unsigned V1_minix_blocks(loff_t, struct super_block *);
extern unsigned V2_minix_blocks(loff_t, struct super_block *);
Index: linux-2.6/fs/minix/itree_common.c
===================================================================
--- linux-2.6.orig/fs/minix/itree_common.c
+++ linux-2.6/fs/minix/itree_common.c
@@ -1,31 +1,29 @@
/* Generic part */
typedef struct {
- block_t *p;
+ block_t *mem;
+ int offset;
block_t key;
- struct buffer_head *bh;
+ struct fsblock_meta *mblock;
} Indirect;
static DEFINE_RWLOCK(pointers_lock);
-static inline void add_chain(Indirect *p, struct buffer_head *bh, block_t *v)
+static inline void add_chain(Indirect *p, struct fsblock_meta *mblock, block_t *mem, int offset)
{
- p->key = *(p->p = v);
- p->bh = bh;
+ p->mem = mem;
+ p->offset = offset;
+ p->key = mem[offset];
+ p->mblock = mblock;
}
static inline int verify_chain(Indirect *from, Indirect *to)
{
- while (from <= to && from->key == *from->p)
+ while (from <= to && from->key == from->mem[from->offset])
from++;
return (from > to);
}
-static inline block_t *block_end(struct buffer_head *bh)
-{
- return (block_t *)((char*)bh->b_data + bh->b_size);
-}
-
static inline Indirect *get_branch(struct inode *inode,
int depth,
int *offsets,
@@ -34,35 +32,43 @@ static inline Indirect *get_branch(struc
{
struct super_block *sb = inode->i_sb;
Indirect *p = chain;
- struct buffer_head *bh;
+ struct fsblock_meta *mblock;
*err = 0;
/* i_data is not going away, no lock needed */
- add_chain (chain, NULL, i_data(inode) + *offsets);
+ add_chain (chain, NULL, i_data(inode), *offsets);
if (!p->key)
- goto no_block;
+ goto out;
while (--depth) {
- bh = sb_bread(sb, block_to_cpu(p->key));
- if (!bh)
- goto failure;
+ void *data;
+
+ mblock = sb_mbread(sb, block_to_cpu(p->key));
+ if (!mblock) {
+ *err = -EIO;
+ goto out;
+ }
read_lock(&pointers_lock);
- if (!verify_chain(chain, p))
- goto changed;
- add_chain(++p, bh, (block_t *)bh->b_data + *++offsets);
+ if (!verify_chain(chain, p)) {
+ /* changed */
+ *err = -EAGAIN;
+ goto out_unlock;
+ }
+ data = vmap_block(mblock_block(mblock), 0, sb->s_blocksize);
+ if (!data) {
+ *err = -ENOMEM;
+ goto out_unlock;
+ }
+ add_chain(++p, mblock, (block_t *)data, *++offsets);
read_unlock(&pointers_lock);
if (!p->key)
- goto no_block;
+ goto out;
}
return NULL;
-changed:
+out_unlock:
read_unlock(&pointers_lock);
- brelse(bh);
- *err = -EAGAIN;
- goto no_block;
-failure:
- *err = -EIO;
-no_block:
+ mblock_put(mblock);
+out:
return p;
}
@@ -71,35 +77,54 @@ static int alloc_branch(struct inode *in
int *offsets,
Indirect *branch)
{
+ struct super_block *sb = inode->i_sb;
int n = 0;
int i;
int parent = minix_new_block(inode);
+ int ret = -ENOSPC;
branch[0].key = cpu_to_block(parent);
if (parent) for (n = 1; n < num; n++) {
- struct buffer_head *bh;
+ struct fsblock_meta *mblock;
+ void *data;
+
/* Allocate the next block */
int nr = minix_new_block(inode);
if (!nr)
break;
branch[n].key = cpu_to_block(nr);
- bh = sb_getblk(inode->i_sb, parent);
- lock_buffer(bh);
- memset(bh->b_data, 0, bh->b_size);
- branch[n].bh = bh;
- branch[n].p = (block_t*) bh->b_data + offsets[n];
- *branch[n].p = branch[n].key;
- set_buffer_uptodate(bh);
- unlock_buffer(bh);
- mark_buffer_dirty_inode(bh, inode);
+ mblock = sb_find_or_create_mblock(sb, parent);
+ if (IS_ERR(mblock)) {
+ ret = PTR_ERR(mblock);
+ break;
+ }
+
+ data = vmap_block(mblock_block(mblock), 0, sb->s_blocksize);
+ if (!data) {
+ ret = -ENOMEM;
+ break;
+ }
+
+ lock_block(mblock);
+ memset(data, 0, sb->s_blocksize); /* XXX: or mblock->size */
+
+ branch[n].mblock = mblock;
+ branch[n].mem = data;
+ branch[n].offset = offsets[n];
+ branch[n].mem[branch[n].offset] = branch[n].key;
+ mark_mblock_uptodate(mblock);
+ unlock_block(mblock);
+ mark_mblock_dirty_inode(mblock, inode);
parent = nr;
}
if (n == num)
return 0;
/* Allocation failed, free what we already allocated */
- for (i = 1; i < n; i++)
- bforget(branch[i].bh);
+ for (i = 1; i < n; i++) {
+ vunmap_block(branch[i].mblock, 0, sb->s_blocksize, branch[i].mem);
+ mblock_put(branch[i].mblock);
+ }
for (i = 0; i < n; i++)
minix_free_block(inode, block_to_cpu(branch[i].key));
return -ENOSPC;
@@ -110,15 +135,16 @@ static inline int splice_branch(struct i
Indirect *where,
int num)
{
+ struct super_block *sb = inode->i_sb;
int i;
write_lock(&pointers_lock);
/* Verify that place we are splicing to is still there and vacant */
- if (!verify_chain(chain, where-1) || *where->p)
+ if (!verify_chain(chain, where-1) || where->mem[where->offset])
goto changed;
- *where->p = where->key;
+ where->mem[where->offset] = where->key;
write_unlock(&pointers_lock);
@@ -127,31 +153,37 @@ static inline int splice_branch(struct i
inode->i_ctime = CURRENT_TIME_SEC;
/* had we spliced it onto indirect block? */
- if (where->bh)
- mark_buffer_dirty_inode(where->bh, inode);
+ if (where->mblock)
+ mark_mblock_dirty_inode(where->mblock, inode);
mark_inode_dirty(inode);
return 0;
changed:
write_unlock(&pointers_lock);
- for (i = 1; i < num; i++)
- bforget(where[i].bh);
+ for (i = 1; i < num; i++) {
+ vunmap_block(where[i].mblock, 0, sb->s_blocksize, where[i].mem);
+ mblock_put(where[i].mblock);
+ }
for (i = 0; i < num; i++)
minix_free_block(inode, block_to_cpu(where[i].key));
return -EAGAIN;
}
-static inline int get_block(struct inode * inode, sector_t block,
- struct buffer_head *bh, int create)
+static inline int insert_block(struct inode *inode, struct fsblock *block, sector_t blocknr, int create)
{
+ struct super_block *sb = inode->i_sb;
int err = -EIO;
int offsets[DEPTH];
Indirect chain[DEPTH];
Indirect *partial;
int left;
- int depth = block_to_path(inode, block, offsets);
+ int depth;
+ if (test_bit(BL_mapped, &block->flags))
+ return 0;
+
+ depth = block_to_path(inode, blocknr, offsets);
if (depth == 0)
goto out;
@@ -161,7 +193,7 @@ reread:
/* Simplest case - block found, no allocation needed */
if (!partial) {
got_it:
- map_bh(bh, inode->i_sb, block_to_cpu(chain[depth-1].key));
+ map_fsblock(block, block_to_cpu(chain[depth-1].key));
/* Clean up and exit */
partial = chain+depth-1; /* the whole chain */
goto cleanup;
@@ -171,7 +203,9 @@ got_it:
if (!create || err == -EIO) {
cleanup:
while (partial > chain) {
- brelse(partial->bh);
+ vunmap_block(partial->mblock, 0, sb->s_blocksize, partial->mem);
+ mblock_put(partial->mblock);
+ /* XXX: balance puts and unmaps etc etc */
partial--;
}
out:
@@ -194,17 +228,56 @@ out:
if (splice_branch(inode, chain, partial, left) < 0)
goto changed;
- set_buffer_new(bh);
+ set_bit(BL_new, &block->flags);
goto got_it;
changed:
while (partial > chain) {
- brelse(partial->bh);
+ vunmap_block(partial->mblock, 0, sb->s_blocksize, partial->mem);
+ mblock_put(partial->mblock);
partial--;
}
goto reread;
}
+static inline int insert_mapping(struct address_space *mapping, loff_t pos,
+ size_t len, int create)
+{
+ struct inode *inode = mapping->host;
+ struct page *page;
+ sector_t blocknr;
+ pgoff_t pgoff, end;
+ struct fsblock *block;
+ int ret;
+
+ BUG_ON(len != PAGE_CACHE_SIZE); /* XXX can't do this yet... */
+
+ pgoff = pos >> PAGE_CACHE_SHIFT;
+ end = (pos + len) >> PAGE_CACHE_SHIFT;
+ blocknr = pos >> inode->i_blkbits;
+
+ page = find_page(mapping, pgoff);
+ BUG_ON(!PageLocked(page));
+
+ /* XXX: sort out brelse & bforget vs block_put */
+
+ block = page_blocks(page);
+ if (fsblock_subpage(block)) {
+ struct fsblock *b;
+ ret = 0;
+ for_each_block(block, b) {
+ ret = insert_block(inode, b, blocknr, create);
+ if (ret)
+ break;
+ blocknr++;
+ }
+ } else {
+ ret = insert_block(inode, block, blocknr, create);
+ }
+
+ return ret;
+}
+
static inline int all_zeroes(block_t *p, block_t *q)
{
while (p < q)
@@ -219,6 +292,7 @@ static Indirect *find_shared(struct inod
Indirect chain[DEPTH],
block_t *top)
{
+ struct super_block *sb = inode->i_sb;
Indirect *partial, *p;
int k, err;
@@ -230,23 +304,25 @@ static Indirect *find_shared(struct inod
write_lock(&pointers_lock);
if (!partial)
partial = chain + k-1;
- if (!partial->key && *partial->p) {
+ if (!partial->key && partial->mem[partial->offset]) {
write_unlock(&pointers_lock);
goto no_top;
}
- for (p=partial;p>chain && all_zeroes((block_t*)p->bh->b_data,p->p);p--)
- ;
+ p = partial;
+ while (p > chain && all_zeroes(p->mem, &p->mem[p->offset]))
+ p--;
if (p == chain + k - 1 && p > chain) {
- p->p--;
+ p->offset--;
} else {
- *top = *p->p;
- *p->p = 0;
+ *top = p->mem[p->offset];
+ p->mem[p->offset] = 0;
}
write_unlock(&pointers_lock);
while(partial > p)
{
- brelse(partial->bh);
+ vunmap_block(partial->mblock, 0, sb->s_blocksize, partial->mem);
+ mblock_put(partial->mblock);
partial--;
}
no_top:
@@ -268,21 +344,25 @@ static inline void free_data(struct inod
static void free_branches(struct inode *inode, block_t *p, block_t *q, int depth)
{
- struct buffer_head * bh;
+ struct super_block *sb = inode->i_sb;
+ struct fsblock_meta *mblock;
unsigned long nr;
if (depth--) {
for ( ; p < q ; p++) {
+ block_t *start, *end;
nr = block_to_cpu(*p);
if (!nr)
continue;
*p = 0;
- bh = sb_bread(inode->i_sb, nr);
- if (!bh)
+ mblock = sb_mbread(sb, nr);
+ if (!mblock)
continue;
- free_branches(inode, (block_t*)bh->b_data,
- block_end(bh), depth);
- bforget(bh);
+ start = vmap_block(mblock, 0, sb->s_blocksize);
+ end = (block_t *)((unsigned long)start + sb->s_blocksize);
+ free_branches(inode, start, end, depth);
+ vunmap_block(mblock, 0, sb->s_blocksize, start);
+ mblock_put(mblock);
minix_free_block(inode, nr);
mark_inode_dirty(inode);
}
@@ -303,7 +383,7 @@ static inline void truncate (struct inod
long iblock;
iblock = (inode->i_size + sb->s_blocksize -1) >> sb->s_blocksize_bits;
- block_truncate_page(inode->i_mapping, inode->i_size, get_block);
+ fsblock_truncate_page(inode->i_mapping, inode->i_size);
n = block_to_path(inode, iblock, offsets);
if (!n)
@@ -321,15 +401,18 @@ static inline void truncate (struct inod
if (partial == chain)
mark_inode_dirty(inode);
else
- mark_buffer_dirty_inode(partial->bh, inode);
+ mark_mblock_dirty_inode(partial->mblock, inode);
free_branches(inode, &nr, &nr+1, (chain+n-1) - partial);
}
/* Clear the ends of indirect blocks on the shared branch */
while (partial > chain) {
- free_branches(inode, partial->p + 1, block_end(partial->bh),
- (chain+n-1) - partial);
- mark_buffer_dirty_inode(partial->bh, inode);
- brelse (partial->bh);
+ block_t *start, *end;
+ start = &partial->mem[partial->offset + 1];
+ end = (block_t *)((unsigned long)partial->mem + sb->s_blocksize);
+ free_branches(inode, start, end, (chain+n-1) - partial);
+ mark_mblock_dirty_inode(partial->mblock, inode);
+ vunmap_block(partial->mblock, 0, sb->s_blocksize, partial->mem);
+ mblock_put(partial->mblock);
partial--;
}
do_indirects:
Index: linux-2.6/fs/minix/itree_v1.c
===================================================================
--- linux-2.6.orig/fs/minix/itree_v1.c
+++ linux-2.6/fs/minix/itree_v1.c
@@ -1,4 +1,4 @@
-#include <linux/buffer_head.h>
+#include <linux/fsblock.h>
#include "minix.h"
enum {DEPTH = 3, DIRECT = 7}; /* Only double indirect */
@@ -44,10 +44,9 @@ static int block_to_path(struct inode *
#include "itree_common.c"
-int V1_minix_get_block(struct inode * inode, long block,
- struct buffer_head *bh_result, int create)
+int V1_minix_insert_mapping(struct address_space *mapping, loff_t off, size_t len, int create)
{
- return get_block(inode, block, bh_result, create);
+ return insert_mapping(mapping, off, len, create);
}
void V1_minix_truncate(struct inode * inode)
Index: linux-2.6/fs/minix/itree_v2.c
===================================================================
--- linux-2.6.orig/fs/minix/itree_v2.c
+++ linux-2.6/fs/minix/itree_v2.c
@@ -1,4 +1,4 @@
-#include <linux/buffer_head.h>
+#include <linux/fsblock.h>
#include "minix.h"
enum {DIRECT = 7, DEPTH = 4}; /* Have triple indirect */
@@ -50,10 +50,9 @@ static int block_to_path(struct inode *
#include "itree_common.c"
-int V2_minix_get_block(struct inode * inode, long block,
- struct buffer_head *bh_result, int create)
+int V2_minix_insert_mapping(struct address_space *mapping, loff_t off, size_t len, int create)
{
- return get_block(inode, block, bh_result, create);
+ return insert_mapping(mapping, off, len, create);
}
void V2_minix_truncate(struct inode * inode)
Index: linux-2.6/fs/minix/bitmap.c
===================================================================
--- linux-2.6.orig/fs/minix/bitmap.c
+++ linux-2.6/fs/minix/bitmap.c
@@ -13,39 +13,48 @@
#include "minix.h"
#include <linux/smp_lock.h>
-#include <linux/buffer_head.h>
+#include <linux/fsblock.h>
#include <linux/bitops.h>
#include <linux/sched.h>
static int nibblemap[] = { 4,3,3,2,3,2,2,1,3,2,2,1,2,1,1,0 };
-static unsigned long count_free(struct buffer_head *map[], unsigned numblocks, __u32 numbits)
+static unsigned long count_free(struct fsblock_meta *map[], unsigned numblocks, __u32 numbits)
{
unsigned i, j, sum = 0;
- struct buffer_head *bh;
+ struct fsblock_meta *mblock;
+ unsigned int size;
+ char *data;
- for (i=0; i<numblocks-1; i++) {
- if (!(bh=map[i]))
+ for (i = 0; i < numblocks - 1; i++) {
+ if (!(mblock = map[i]))
return(0);
- for (j=0; j<bh->b_size; j++)
- sum += nibblemap[bh->b_data[j] & 0xf]
- + nibblemap[(bh->b_data[j]>>4) & 0xf];
+ size = fsblock_size(mblock_block(mblock));
+ data = vmap_block(mblock_block(mblock), 0, size);
+ for (j = 0; j < size; j++)
+ sum += nibblemap[data[j] & 0xf]
+ + nibblemap[(data[j]>>4) & 0xf];
+ vunmap_block(mblock_block(mblock), 0, size, data);
}
- if (numblocks==0 || !(bh=map[numblocks-1]))
+ if (numblocks == 0 || !(mblock = map[numblocks-1]))
return(0);
- i = ((numbits - (numblocks-1) * bh->b_size * 8) / 16) * 2;
+ size = fsblock_size(mblock_block(mblock));
+ i = ((numbits - (numblocks-1) * size * 8) / 16) * 2;
+ data = vmap_block(mblock, 0, size);
for (j=0; j<i; j++) {
- sum += nibblemap[bh->b_data[j] & 0xf]
- + nibblemap[(bh->b_data[j]>>4) & 0xf];
+ sum += nibblemap[data[j] & 0xf]
+ + nibblemap[(data[j]>>4) & 0xf];
}
i = numbits%16;
if (i!=0) {
- i = *(__u16 *)(&bh->b_data[j]) | ~((1<<i) - 1);
+ i = *(__u16 *)(&data[j]) | ~((1<<i) - 1);
sum += nibblemap[i & 0xf] + nibblemap[(i>>4) & 0xf];
sum += nibblemap[(i>>8) & 0xf] + nibblemap[(i>>12) & 0xf];
}
+ vunmap_block(mblock, 0, size, data);
+
return(sum);
}
@@ -53,7 +62,9 @@ void minix_free_block(struct inode *inod
{
struct super_block *sb = inode->i_sb;
struct minix_sb_info *sbi = minix_sb(sb);
- struct buffer_head *bh;
+ struct fsblock_meta *mblock;
+ char *data;
+ unsigned int size;
int k = sb->s_blocksize_bits + 3;
unsigned long bit, zone;
@@ -68,13 +79,16 @@ void minix_free_block(struct inode *inod
printk("minix_free_block: nonexistent bitmap buffer\n");
return;
}
- bh = sbi->s_zmap[zone];
+ mblock = sbi->s_zmap[zone];
+ size = fsblock_size(mblock_block(mblock));
+ data = vmap_block(mblock, 0, size);
lock_kernel();
- if (!minix_test_and_clear_bit(bit, bh->b_data))
+ if (!minix_test_and_clear_bit(bit, data))
printk("minix_free_block (%s:%lu): bit already cleared\n",
sb->s_id, block);
unlock_kernel();
- mark_buffer_dirty(bh);
+ vunmap_block(mblock, 0, size, data);
+ mark_mblock_dirty_inode(mblock, inode);
return;
}
@@ -85,21 +99,26 @@ int minix_new_block(struct inode * inode
int i;
for (i = 0; i < sbi->s_zmap_blocks; i++) {
- struct buffer_head *bh = sbi->s_zmap[i];
+ struct fsblock_meta *mblock = sbi->s_zmap[i];
+ unsigned int size = fsblock_size(mblock_block(mblock));
+ char *data;
int j;
+ data = vmap_block(mblock, 0, size);
lock_kernel();
- j = minix_find_first_zero_bit(bh->b_data, bits_per_zone);
+ j = minix_find_first_zero_bit(data, bits_per_zone);
if (j < bits_per_zone) {
- minix_set_bit(j, bh->b_data);
+ minix_set_bit(j, data);
unlock_kernel();
- mark_buffer_dirty(bh);
+ vunmap_block(mblock, 0, size, data);
+ mark_mblock_dirty_inode(mblock, inode);
j += i * bits_per_zone + sbi->s_firstdatazone-1;
if (j < sbi->s_firstdatazone || j >= sbi->s_nzones)
break;
return j;
}
unlock_kernel();
+ vunmap_block(mblock, 0, size, data);
}
return 0;
}
@@ -112,11 +131,12 @@ unsigned long minix_count_free_blocks(st
}
struct minix_inode *
-minix_V1_raw_inode(struct super_block *sb, ino_t ino, struct buffer_head **bh)
+minix_V1_raw_inode(struct super_block *sb, ino_t ino, struct fsblock_meta **mblock)
{
int block;
struct minix_sb_info *sbi = minix_sb(sb);
struct minix_inode *p;
+ unsigned int size;
if (!ino || ino > sbi->s_ninodes) {
printk("Bad inode number on dev %s: %ld is out of range\n",
@@ -126,24 +146,32 @@ minix_V1_raw_inode(struct super_block *s
ino--;
block = 2 + sbi->s_imap_blocks + sbi->s_zmap_blocks +
ino / MINIX_INODES_PER_BLOCK;
- *bh = sb_bread(sb, block);
- if (!*bh) {
+ *mblock = sb_mbread(sb, block);
+ if (!*mblock) {
printk("Unable to read inode block\n");
return NULL;
}
- p = (void *)(*bh)->b_data;
+ size = fsblock_size(mblock_block(*mblock));
+ p = vmap_block(*mblock, 0, size);
return p + ino % MINIX_INODES_PER_BLOCK;
}
+void minix_put_raw_inode(struct super_block *sb, ino_t ino, struct fsblock_meta *mblock, struct minix_inode *p)
+{
+ unsigned int size = fsblock_size(mblock_block(mblock));
+ vunmap_block(mblock, 0, size, p - ino%MINIX_INODES_PER_BLOCK);
+ mblock_put(mblock);
+}
+
struct minix2_inode *
-minix_V2_raw_inode(struct super_block *sb, ino_t ino, struct buffer_head **bh)
+minix_V2_raw_inode(struct super_block *sb, ino_t ino, struct fsblock_meta **mblock)
{
int block;
struct minix_sb_info *sbi = minix_sb(sb);
struct minix2_inode *p;
int minix2_inodes_per_block = sb->s_blocksize / sizeof(struct minix2_inode);
+ unsigned int size;
- *bh = NULL;
if (!ino || ino > sbi->s_ninodes) {
printk("Bad inode number on dev %s: %ld is out of range\n",
sb->s_id, (long)ino);
@@ -152,49 +180,64 @@ minix_V2_raw_inode(struct super_block *s
ino--;
block = 2 + sbi->s_imap_blocks + sbi->s_zmap_blocks +
ino / minix2_inodes_per_block;
- *bh = sb_bread(sb, block);
- if (!*bh) {
+ *mblock = sb_mbread(sb, block);
+ if (!*mblock) {
printk("Unable to read inode block\n");
return NULL;
}
- p = (void *)(*bh)->b_data;
+ size = fsblock_size(mblock_block(*mblock));
+ p = vmap_block(*mblock, 0, size);
return p + ino % minix2_inodes_per_block;
}
+void minix2_put_raw_inode(struct super_block *sb, ino_t ino, struct fsblock_meta *mblock, struct minix2_inode *p)
+{
+ int minix2_inodes_per_block = sb->s_blocksize / sizeof(struct minix2_inode);
+ unsigned int size = fsblock_size(mblock_block(mblock));
+
+ ino--;
+ vunmap_block(mblock, 0, size, p - ino%minix2_inodes_per_block);
+ mblock_put(mblock);
+}
+
/* Clear the link count and mode of a deleted inode on disk. */
static void minix_clear_inode(struct inode *inode)
{
- struct buffer_head *bh = NULL;
+ struct super_block *sb = inode->i_sb;
+ ino_t ino = inode->i_ino;
+ struct fsblock_meta *mblock;
if (INODE_VERSION(inode) == MINIX_V1) {
struct minix_inode *raw_inode;
- raw_inode = minix_V1_raw_inode(inode->i_sb, inode->i_ino, &bh);
+ raw_inode = minix_V1_raw_inode(sb, ino, &mblock);
if (raw_inode) {
raw_inode->i_nlinks = 0;
raw_inode->i_mode = 0;
+ mark_mblock_dirty(mblock);
+ minix_put_raw_inode(sb, ino, mblock, raw_inode);
}
} else {
struct minix2_inode *raw_inode;
- raw_inode = minix_V2_raw_inode(inode->i_sb, inode->i_ino, &bh);
+ raw_inode = minix_V2_raw_inode(sb, ino, &mblock);
if (raw_inode) {
raw_inode->i_nlinks = 0;
raw_inode->i_mode = 0;
+ mark_mblock_dirty(mblock);
+ minix2_put_raw_inode(sb, ino, mblock, raw_inode);
}
}
- if (bh) {
- mark_buffer_dirty(bh);
- brelse (bh);
- }
}
void minix_free_inode(struct inode * inode)
{
struct super_block *sb = inode->i_sb;
struct minix_sb_info *sbi = minix_sb(inode->i_sb);
- struct buffer_head *bh;
+ struct fsblock_meta *mblock;
int k = sb->s_blocksize_bits + 3;
unsigned long ino, bit;
+ unsigned int size;
+ char *data;
ino = inode->i_ino;
if (ino < 1 || ino > sbi->s_ninodes) {
@@ -210,12 +253,15 @@ void minix_free_inode(struct inode * ino
minix_clear_inode(inode); /* clear on-disk copy */
- bh = sbi->s_imap[ino];
+ mblock = sbi->s_imap[ino];
+ size = fsblock_size(mblock_block(mblock));
+ data = vmap_block(mblock, 0, size);
lock_kernel();
- if (!minix_test_and_clear_bit(bit, bh->b_data))
+ if (!minix_test_and_clear_bit(bit, data))
printk("minix_free_inode: bit %lu already cleared\n", bit);
unlock_kernel();
- mark_buffer_dirty(bh);
+ vunmap_block(mblock, 0, size, data);
+ mark_mblock_dirty(mblock);
out:
clear_inode(inode); /* clear in-memory copy */
}
@@ -225,7 +271,9 @@ struct inode * minix_new_inode(const str
struct super_block *sb = dir->i_sb;
struct minix_sb_info *sbi = minix_sb(sb);
struct inode *inode = new_inode(sb);
- struct buffer_head * bh;
+ struct fsblock_meta * mblock;
+ unsigned int size;
+ char * data;
int bits_per_zone = 8 * sb->s_blocksize;
unsigned long j;
int i;
@@ -235,28 +283,32 @@ struct inode * minix_new_inode(const str
return NULL;
}
j = bits_per_zone;
- bh = NULL;
+ mblock = NULL;
*error = -ENOSPC;
lock_kernel();
for (i = 0; i < sbi->s_imap_blocks; i++) {
- bh = sbi->s_imap[i];
- j = minix_find_first_zero_bit(bh->b_data, bits_per_zone);
+ mblock = sbi->s_imap[i];
+ size = fsblock_size(mblock_block(mblock));
+ data = vmap_block(mblock, 0, size);
+ j = minix_find_first_zero_bit(data, bits_per_zone);
if (j < bits_per_zone)
break;
+ vunmap_block(mblock, 0, size, data);
}
- if (!bh || j >= bits_per_zone) {
+ if (!mblock || j >= bits_per_zone) {
unlock_kernel();
iput(inode);
return NULL;
}
- if (minix_test_and_set_bit(j, bh->b_data)) { /* shouldn't happen */
+ if (minix_test_and_set_bit(j, data)) { /* shouldn't happen */
unlock_kernel();
printk("minix_new_inode: bit already set\n");
iput(inode);
return NULL;
}
unlock_kernel();
- mark_buffer_dirty(bh);
+ vunmap_block(mblock, 0, size, data);
+ mark_mblock_dirty(mblock);
j += i * bits_per_zone;
if (!j || j > sbi->s_ninodes) {
iput(inode);
Index: linux-2.6/fs/minix/inode.c
===================================================================
--- linux-2.6.orig/fs/minix/inode.c
+++ linux-2.6/fs/minix/inode.c
@@ -12,7 +12,7 @@
#include <linux/module.h>
#include "minix.h"
-#include <linux/buffer_head.h>
+#include <linux/fsblock.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/highuid.h>
@@ -25,27 +25,34 @@ static int minix_remount (struct super_b
static void minix_delete_inode(struct inode *inode)
{
- truncate_inode_pages(&inode->i_data, 0);
+ struct address_space *mapping = &inode->i_data;
+
+ truncate_inode_pages(mapping, 0);
inode->i_size = 0;
minix_truncate(inode);
+ fsblock_release(mapping, 1);
minix_free_inode(inode);
}
static void minix_put_super(struct super_block *sb)
{
int i;
+ unsigned int offset;
struct minix_sb_info *sbi = minix_sb(sb);
if (!(sb->s_flags & MS_RDONLY)) {
if (sbi->s_version != MINIX_V3) /* s_state is now out from V3 sb */
sbi->s_ms->s_state = sbi->s_mount_state;
- mark_buffer_dirty(sbi->s_sbh);
+ mark_mblock_dirty(sbi->s_smblock);
}
for (i = 0; i < sbi->s_imap_blocks; i++)
- brelse(sbi->s_imap[i]);
+ mblock_put(sbi->s_imap[i]);
for (i = 0; i < sbi->s_zmap_blocks; i++)
- brelse(sbi->s_zmap[i]);
- brelse (sbi->s_sbh);
+ mblock_put(sbi->s_zmap[i]);
+
+ offset = BLOCK_SIZE - mblock_block(sbi->s_smblock)->block_nr * sb->s_blocksize;
+ vunmap_block(sbi->s_smblock, offset, BLOCK_SIZE, sbi->s_ms);
+ mblock_put(sbi->s_smblock);
kfree(sbi->s_imap);
sb->s_fs_info = NULL;
kfree(sbi);
@@ -119,7 +126,7 @@ static int minix_remount (struct super_b
/* Mounting a rw partition read-only. */
if (sbi->s_version != MINIX_V3)
ms->s_state = sbi->s_mount_state;
- mark_buffer_dirty(sbi->s_sbh);
+ mark_mblock_dirty(sbi->s_smblock);
} else {
/* Mount a partition which is read-only, read-write. */
if (sbi->s_version != MINIX_V3) {
@@ -128,7 +135,7 @@ static int minix_remount (struct super_b
} else {
sbi->s_mount_state = MINIX_VALID_FS;
}
- mark_buffer_dirty(sbi->s_sbh);
+ mark_mblock_dirty(sbi->s_smblock);
if (!(sbi->s_mount_state & MINIX_VALID_FS))
printk("MINIX-fs warning: remounting unchecked fs, "
@@ -142,13 +149,17 @@ static int minix_remount (struct super_b
static int minix_fill_super(struct super_block *s, void *data, int silent)
{
- struct buffer_head *bh;
- struct buffer_head **map;
+ struct fsblock_meta *mblock;
+ struct fsblock_meta **map;
struct minix_super_block *ms;
struct minix3_super_block *m3s = NULL;
unsigned long i, block;
struct inode *root_inode;
struct minix_sb_info *sbi;
+ char *d;
+ unsigned int size = BLOCK_SIZE;
+ sector_t blocknr = BLOCK_SIZE / size;
+ unsigned int offset = BLOCK_SIZE - blocknr * size;
sbi = kzalloc(sizeof(struct minix_sb_info), GFP_KERNEL);
if (!sbi)
@@ -158,15 +169,15 @@ static int minix_fill_super(struct super
BUILD_BUG_ON(32 != sizeof (struct minix_inode));
BUILD_BUG_ON(64 != sizeof(struct minix2_inode));
- if (!sb_set_blocksize(s, BLOCK_SIZE))
+ if (!sb_set_blocksize(s, size))
goto out_bad_hblock;
- if (!(bh = sb_bread(s, 1)))
+ if (!(mblock = sb_mbread(s, blocknr)))
goto out_bad_sb;
- ms = (struct minix_super_block *) bh->b_data;
+ ms = vmap_block(mblock, offset, BLOCK_SIZE); /* XXX: unmap where? */
sbi->s_ms = ms;
- sbi->s_sbh = bh;
+ sbi->s_smblock = mblock;
sbi->s_mount_state = ms->s_state;
sbi->s_ninodes = ms->s_ninodes;
sbi->s_nzones = ms->s_nzones;
@@ -198,8 +209,8 @@ static int minix_fill_super(struct super
sbi->s_dirsize = 32;
sbi->s_namelen = 30;
sbi->s_link_max = MINIX2_LINK_MAX;
- } else if ( *(__u16 *)(bh->b_data + 24) == MINIX3_SUPER_MAGIC) {
- m3s = (struct minix3_super_block *) bh->b_data;
+ } else if ( *((__u16 *)ms + 12) == MINIX3_SUPER_MAGIC) {
+ m3s = (struct minix3_super_block *)ms;
s->s_magic = m3s->s_magic;
sbi->s_imap_blocks = m3s->s_imap_blocks;
sbi->s_zmap_blocks = m3s->s_zmap_blocks;
@@ -213,7 +224,22 @@ static int minix_fill_super(struct super
sbi->s_version = MINIX_V3;
sbi->s_link_max = MINIX2_LINK_MAX;
sbi->s_mount_state = MINIX_VALID_FS;
- sb_set_blocksize(s, m3s->s_blocksize);
+ size = m3s->s_blocksize;
+ if (size != BLOCK_SIZE) {
+ blocknr = BLOCK_SIZE / size;
+ offset = BLOCK_SIZE - blocknr * size;
+
+ vunmap_block(mblock, offset, BLOCK_SIZE, ms);
+ mblock_put(mblock);
+ if (!sb_set_blocksize(s, size))
+ goto out_bad_hblock;
+ if (!(mblock = sb_mbread(s, blocknr)))
+ goto out_bad_sb;
+ ms = vmap_block(mblock, offset, BLOCK_SIZE);
+ m3s = (struct minix3_super_block *)ms;
+ sbi->s_ms = ms;
+ sbi->s_smblock = mblock;
+ }
} else
goto out_no_fs;
@@ -222,7 +248,7 @@ static int minix_fill_super(struct super
*/
if (sbi->s_imap_blocks == 0 || sbi->s_zmap_blocks == 0)
goto out_illegal_sb;
- i = (sbi->s_imap_blocks + sbi->s_zmap_blocks) * sizeof(bh);
+ i = (sbi->s_imap_blocks + sbi->s_zmap_blocks) * sizeof(mblock);
map = kzalloc(i, GFP_KERNEL);
if (!map)
goto out_no_map;
@@ -231,18 +257,23 @@ static int minix_fill_super(struct super
block=2;
for (i=0 ; i < sbi->s_imap_blocks ; i++) {
- if (!(sbi->s_imap[i]=sb_bread(s, block)))
+ if (!(sbi->s_imap[i] = sb_mbread(s, block)))
goto out_no_bitmap;
block++;
}
for (i=0 ; i < sbi->s_zmap_blocks ; i++) {
- if (!(sbi->s_zmap[i]=sb_bread(s, block)))
+ if (!(sbi->s_zmap[i] = sb_mbread(s, block)))
goto out_no_bitmap;
block++;
}
- minix_set_bit(0,sbi->s_imap[0]->b_data);
- minix_set_bit(0,sbi->s_zmap[0]->b_data);
+ d = vmap_block(sbi->s_imap[0], 0, size);
+ minix_set_bit(0, d);
+ vunmap_block(sbi->s_imap[0], 0, size, d);
+
+ d = vmap_block(sbi->s_zmap[0], 0, size);
+ minix_set_bit(0, d);
+ vunmap_block(sbi->s_zmap[0], 0, size, d);
/* set up enough so that it can read an inode */
s->s_op = &minix_sops;
@@ -260,8 +291,9 @@ static int minix_fill_super(struct super
if (!(s->s_flags & MS_RDONLY)) {
if (sbi->s_version != MINIX_V3) /* s_state is now out from V3 sb */
ms->s_state &= ~MINIX_VALID_FS;
- mark_buffer_dirty(bh);
+ mark_mblock_dirty(mblock);
}
+
if (!(sbi->s_mount_state & MINIX_VALID_FS))
printk("MINIX-fs: mounting unchecked file system, "
"running fsck is recommended\n");
@@ -283,9 +315,9 @@ out_no_bitmap:
printk("MINIX-fs: bad superblock or unable to read bitmaps\n");
out_freemap:
for (i = 0; i < sbi->s_imap_blocks; i++)
- brelse(sbi->s_imap[i]);
+ mblock_put(sbi->s_imap[i]);
for (i = 0; i < sbi->s_zmap_blocks; i++)
- brelse(sbi->s_zmap[i]);
+ mblock_put(sbi->s_zmap[i]);
kfree(sbi->s_imap);
goto out_release;
@@ -304,7 +336,8 @@ out_no_fs:
printk("VFS: Can't find a Minix filesystem V1 | V2 | V3 "
"on device %s.\n", s->s_id);
out_release:
- brelse(bh);
+ vunmap_block(mblock, offset, BLOCK_SIZE, ms);
+ mblock_put(mblock);
goto out;
out_bad_hblock:
@@ -333,38 +366,45 @@ static int minix_statfs(struct dentry *d
return 0;
}
-static int minix_get_block(struct inode *inode, sector_t block,
- struct buffer_head *bh_result, int create)
+static int minix_insert_mapping(struct address_space *mapping, loff_t off, size_t len, int create)
{
- if (INODE_VERSION(inode) == MINIX_V1)
- return V1_minix_get_block(inode, block, bh_result, create);
+ if (INODE_VERSION(mapping->host) == MINIX_V1)
+ return V1_minix_insert_mapping(mapping, off, len, create);
else
- return V2_minix_get_block(inode, block, bh_result, create);
+ return V2_minix_insert_mapping(mapping, off, len, create);
}
static int minix_writepage(struct page *page, struct writeback_control *wbc)
{
- return block_write_full_page(page, minix_get_block, wbc);
+ return fsblock_write_page(page, minix_insert_mapping, wbc);
}
+
static int minix_readpage(struct file *file, struct page *page)
{
- return block_read_full_page(page,minix_get_block);
+ return fsblock_read_page(page, minix_insert_mapping);
}
+
static int minix_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to)
{
- return block_prepare_write(page,from,to,minix_get_block);
+ return fsblock_prepare_write(page, from, to, minix_insert_mapping);
}
+
static sector_t minix_bmap(struct address_space *mapping, sector_t block)
{
- return generic_block_bmap(mapping,block,minix_get_block);
+ return fsblock_bmap(mapping, block, minix_insert_mapping);
}
+
static const struct address_space_operations minix_aops = {
.readpage = minix_readpage,
.writepage = minix_writepage,
- .sync_page = block_sync_page,
+// .sync_page = block_sync_page,
.prepare_write = minix_prepare_write,
- .commit_write = generic_commit_write,
- .bmap = minix_bmap
+ .commit_write = fsblock_commit_write,
+ .bmap = minix_bmap,
+ .set_page_dirty = fsblock_set_page_dirty,
+ .invalidatepage = fsblock_invalidate_page,
+ .release = fsblock_release,
+ .sync = fsblock_sync,
};
static const struct inode_operations minix_symlink_inode_operations = {
@@ -396,12 +436,12 @@ void minix_set_inode(struct inode *inode
*/
static void V1_minix_read_inode(struct inode * inode)
{
- struct buffer_head * bh;
+ struct fsblock_meta *mblock;
struct minix_inode * raw_inode;
struct minix_inode_info *minix_inode = minix_i(inode);
int i;
- raw_inode = minix_V1_raw_inode(inode->i_sb, inode->i_ino, &bh);
+ raw_inode = minix_V1_raw_inode(inode->i_sb, inode->i_ino, &mblock);
if (!raw_inode) {
make_bad_inode(inode);
return;
@@ -419,7 +459,7 @@ static void V1_minix_read_inode(struct i
for (i = 0; i < 9; i++)
minix_inode->u.i1_data[i] = raw_inode->i_zone[i];
minix_set_inode(inode, old_decode_dev(raw_inode->i_zone[0]));
- brelse(bh);
+ minix_put_raw_inode(inode->i_sb, inode->i_ino, mblock, raw_inode);
}
/*
@@ -427,12 +467,13 @@ static void V1_minix_read_inode(struct i
*/
static void V2_minix_read_inode(struct inode * inode)
{
- struct buffer_head * bh;
+ struct fsblock_meta *mblock;
struct minix2_inode * raw_inode;
struct minix_inode_info *minix_inode = minix_i(inode);
int i;
+ ino_t ino = inode->i_ino;
- raw_inode = minix_V2_raw_inode(inode->i_sb, inode->i_ino, &bh);
+ raw_inode = minix_V2_raw_inode(inode->i_sb, ino, &mblock);
if (!raw_inode) {
make_bad_inode(inode);
return;
@@ -452,7 +493,7 @@ static void V2_minix_read_inode(struct i
for (i = 0; i < 10; i++)
minix_inode->u.i2_data[i] = raw_inode->i_zone[i];
minix_set_inode(inode, old_decode_dev(raw_inode->i_zone[0]));
- brelse(bh);
+ minix2_put_raw_inode(inode->i_sb, ino, mblock, raw_inode);
}
/*
@@ -469,14 +510,14 @@ static void minix_read_inode(struct inod
/*
* The minix V1 function to synchronize an inode.
*/
-static struct buffer_head * V1_minix_update_inode(struct inode * inode)
+static struct fsblock_meta * V1_minix_update_inode(struct inode * inode)
{
- struct buffer_head * bh;
+ struct fsblock_meta * mblock;
struct minix_inode * raw_inode;
struct minix_inode_info *minix_inode = minix_i(inode);
int i;
- raw_inode = minix_V1_raw_inode(inode->i_sb, inode->i_ino, &bh);
+ raw_inode = minix_V1_raw_inode(inode->i_sb, inode->i_ino, &mblock);
if (!raw_inode)
return NULL;
raw_inode->i_mode = inode->i_mode;
@@ -489,21 +530,23 @@ static struct buffer_head * V1_minix_upd
raw_inode->i_zone[0] = old_encode_dev(inode->i_rdev);
else for (i = 0; i < 9; i++)
raw_inode->i_zone[i] = minix_inode->u.i1_data[i];
- mark_buffer_dirty(bh);
- return bh;
+ mblock_get(mblock);
+ mark_mblock_dirty_inode(mblock, inode);
+ minix_put_raw_inode(inode->i_sb, inode->i_ino, mblock, raw_inode);
+ return mblock;
}
/*
* The minix V2 function to synchronize an inode.
*/
-static struct buffer_head * V2_minix_update_inode(struct inode * inode)
+static struct fsblock_meta * V2_minix_update_inode(struct inode * inode)
{
- struct buffer_head * bh;
+ struct fsblock_meta * mblock;
struct minix2_inode * raw_inode;
struct minix_inode_info *minix_inode = minix_i(inode);
int i;
- raw_inode = minix_V2_raw_inode(inode->i_sb, inode->i_ino, &bh);
+ raw_inode = minix_V2_raw_inode(inode->i_sb, inode->i_ino, &mblock);
if (!raw_inode)
return NULL;
raw_inode->i_mode = inode->i_mode;
@@ -518,11 +561,13 @@ static struct buffer_head * V2_minix_upd
raw_inode->i_zone[0] = old_encode_dev(inode->i_rdev);
else for (i = 0; i < 10; i++)
raw_inode->i_zone[i] = minix_inode->u.i2_data[i];
- mark_buffer_dirty(bh);
- return bh;
+ mblock_get(mblock);
+ mark_mblock_dirty_inode(mblock, inode);
+ minix2_put_raw_inode(inode->i_sb, inode->i_ino, mblock, raw_inode);
+ return mblock;
}
-static struct buffer_head *minix_update_inode(struct inode *inode)
+static struct fsblock_meta *minix_update_inode(struct inode *inode)
{
if (INODE_VERSION(inode) == MINIX_V1)
return V1_minix_update_inode(inode);
@@ -532,29 +577,28 @@ static struct buffer_head *minix_update_
static int minix_write_inode(struct inode * inode, int wait)
{
- brelse(minix_update_inode(inode));
+ mblock_put(minix_update_inode(inode));
return 0;
}
int minix_sync_inode(struct inode * inode)
{
int err = 0;
- struct buffer_head *bh;
+ struct fsblock_meta *mblock;
- bh = minix_update_inode(inode);
- if (bh && buffer_dirty(bh))
- {
- sync_dirty_buffer(bh);
- if (buffer_req(bh) && !buffer_uptodate(bh))
+ mblock = minix_update_inode(inode);
+ if (mblock && test_bit(BL_dirty, &mblock_block(mblock)->flags)) {
+ sync_block(mblock_block(mblock));
+ if (test_bit(BL_error, &mblock_block(mblock)->flags))
{
printk("IO error syncing minix inode [%s:%08lx]\n",
inode->i_sb->s_id, inode->i_ino);
err = -1;
}
}
- else if (!bh)
+ else if (!mblock)
err = -1;
- brelse (bh);
+ mblock_put(mblock);
return err;
}
Index: linux-2.6/fs/minix/file.c
===================================================================
--- linux-2.6.orig/fs/minix/file.c
+++ linux-2.6/fs/minix/file.c
@@ -6,7 +6,7 @@
* minix regular file handling primitives
*/
-#include <linux/buffer_head.h> /* for fsync_inode_buffers() */
+#include <linux/fsblock.h>
#include "minix.h"
/*
@@ -21,7 +21,7 @@ const struct file_operations minix_file_
.aio_read = generic_file_aio_read,
.write = do_sync_write,
.aio_write = generic_file_aio_write,
- .mmap = generic_file_mmap,
+ .mmap = fsblock_file_mmap,
.fsync = minix_sync_file,
.sendfile = generic_file_sendfile,
};
@@ -36,7 +36,7 @@ int minix_sync_file(struct file * file,
struct inode *inode = dentry->d_inode;
int err;
- err = sync_mapping_buffers(inode->i_mapping);
+ err = fsblock_sync(inode->i_mapping);
if (!(inode->i_state & I_DIRTY))
return err;
if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
-
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