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Btrfs: fixup various fsx failures

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2007-05-29 15:17:08 -04:00 committed by David Woodhouse
parent 3a68637562
commit 1de037a43e
3 changed files with 214 additions and 32 deletions
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3
fs/btrfs/ctree.h
View File

@ -1198,5 +1198,8 @@ struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
struct btrfs_path *path,
u64 objectid, u64 offset,
int cow);
int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct btrfs_path *path,
u64 isize);
/* super.c */
#endif

30
fs/btrfs/file-item.c
View File

@ -2,6 +2,7 @@
#include "ctree.h"
#include "disk-io.h"
#include "transaction.h"
#include "print-tree.h"
#define MAX_CSUM_ITEMS(r) ((((BTRFS_LEAF_DATA_SIZE(r) - \
sizeof(struct btrfs_item) * 2) / \
@ -27,6 +28,10 @@ int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
ret = btrfs_insert_empty_item(trans, root, path, &file_key,
sizeof(*item));
if (ret) {
printk("failed to insert %Lu %Lu ret %d\n", objectid, pos, ret);
btrfs_print_leaf(root, btrfs_buffer_leaf(path->nodes[0]));
}
BUG_ON(ret);
item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]), path->slots[0],
struct btrfs_file_extent_item);
@ -218,6 +223,31 @@ fail:
return ret;
}
int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct btrfs_path *path,
u64 isize)
{
struct btrfs_key key;
struct btrfs_leaf *leaf = btrfs_buffer_leaf(path->nodes[0]);
int slot = path->slots[0];
int ret;
u32 new_item_size;
u64 new_item_span;
u64 blocks;
btrfs_disk_key_to_cpu(&key, &leaf->items[slot].key);
if (isize <= key.offset)
return 0;
new_item_span = isize - key.offset;
blocks = (new_item_span + root->blocksize - 1) / root->blocksize;
new_item_size = blocks * BTRFS_CRC32_SIZE;
if (new_item_size >= btrfs_item_size(leaf->items + slot))
return 0;
ret = btrfs_truncate_item(trans, root, path, new_item_size);
BUG_ON(ret);
return ret;
}
int btrfs_csum_verify_file_block(struct btrfs_root *root,
u64 objectid, u64 offset,
char *data, size_t len)

213
fs/btrfs/super.c
View File

@ -36,6 +36,13 @@ static struct address_space_operations btrfs_aops;
static struct address_space_operations btrfs_symlink_aops;
static struct file_operations btrfs_file_operations;
static int drop_extents(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct inode *inode,
u64 start, u64 end, u64 *hint_block);
static int btrfs_get_block(struct inode *inode, sector_t iblock,
struct buffer_head *result, int create);
static void btrfs_read_locked_inode(struct inode *inode)
{
struct btrfs_path *path;
@ -381,10 +388,12 @@ static int btrfs_truncate_in_trans(struct btrfs_trans_handle *trans,
struct btrfs_disk_key *found_key;
u32 found_type;
struct btrfs_leaf *leaf;
struct btrfs_file_extent_item *fi = NULL;
struct btrfs_file_extent_item *fi;
u64 extent_start = 0;
u64 extent_num_blocks = 0;
u64 item_end = 0;
int found_extent;
int del_item;
path = btrfs_alloc_path();
BUG_ON(!path);
@ -394,6 +403,7 @@ static int btrfs_truncate_in_trans(struct btrfs_trans_handle *trans,
key.flags = (u32)-1;
while(1) {
btrfs_init_path(path);
fi = NULL;
ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
if (ret < 0) {
goto error;
@ -413,16 +423,52 @@ static int btrfs_truncate_in_trans(struct btrfs_trans_handle *trans,
found_type != BTRFS_DIR_INDEX_KEY &&
found_type != BTRFS_EXTENT_DATA_KEY)
break;
if (btrfs_disk_key_offset(found_key) < inode->i_size)
break;
found_extent = 0;
if (btrfs_disk_key_type(found_key) == BTRFS_EXTENT_DATA_KEY) {
item_end = btrfs_disk_key_offset(found_key);
if (found_type == BTRFS_EXTENT_DATA_KEY) {
fi = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]),
path->slots[0],
struct btrfs_file_extent_item);
if (btrfs_file_extent_type(fi) !=
BTRFS_FILE_EXTENT_INLINE) {
u64 num_dec;
item_end += btrfs_file_extent_num_blocks(fi) <<
inode->i_blkbits;
}
}
if (found_type == BTRFS_CSUM_ITEM_KEY) {
ret = btrfs_csum_truncate(trans, root, path,
inode->i_size);
BUG_ON(ret);
}
if (item_end < inode->i_size) {
if (found_type) {
btrfs_set_key_type(&key, found_type - 1);
continue;
}
break;
}
if (btrfs_disk_key_offset(found_key) >= inode->i_size)
del_item = 1;
else
del_item = 0;
found_extent = 0;
if (found_type == BTRFS_EXTENT_DATA_KEY &&
btrfs_file_extent_type(fi) !=
BTRFS_FILE_EXTENT_INLINE) {
u64 num_dec;
if (!del_item) {
u64 orig_num_blocks =
btrfs_file_extent_num_blocks(fi);
extent_num_blocks = inode->i_size -
btrfs_disk_key_offset(found_key) +
root->blocksize - 1;
extent_num_blocks >>= inode->i_blkbits;
btrfs_set_file_extent_num_blocks(fi,
extent_num_blocks);
inode->i_blocks -= (orig_num_blocks -
extent_num_blocks) << 3;
mark_buffer_dirty(path->nodes[0]);
} else {
extent_start =
btrfs_file_extent_disk_blocknr(fi);
extent_num_blocks =
@ -435,8 +481,12 @@ static int btrfs_truncate_in_trans(struct btrfs_trans_handle *trans,
}
}
}
ret = btrfs_del_item(trans, root, path);
BUG_ON(ret);
if (del_item) {
ret = btrfs_del_item(trans, root, path);
BUG_ON(ret);
} else {
break;
}
btrfs_release_path(root, path);
if (found_extent) {
ret = btrfs_free_extent(trans, root, extent_start,
@ -452,6 +502,68 @@ error:
return ret;
}
static int btrfs_truncate_page(struct address_space *mapping, loff_t from)
{
struct inode *inode = mapping->host;
unsigned blocksize = 1 << inode->i_blkbits;
pgoff_t index = from >> PAGE_CACHE_SHIFT;
unsigned offset = from & (PAGE_CACHE_SIZE-1);
struct page *page;
char *kaddr;
int ret = 0;
struct btrfs_root *root = BTRFS_I(inode)->root;
u64 alloc_hint;
struct btrfs_key ins;
struct btrfs_trans_handle *trans;
if ((offset & (blocksize - 1)) == 0)
goto out;
ret = -ENOMEM;
page = grab_cache_page(mapping, index);
if (!page)
goto out;
if (!PageUptodate(page)) {
ret = mpage_readpage(page, btrfs_get_block);
lock_page(page);
if (!PageUptodate(page)) {
ret = -EIO;
goto out;
}
}
mutex_lock(&root->fs_info->fs_mutex);
trans = btrfs_start_transaction(root, 1);
btrfs_set_trans_block_group(trans, inode);
ret = drop_extents(trans, root, inode, page->index << PAGE_CACHE_SHIFT,
(page->index + 1) << PAGE_CACHE_SHIFT, &alloc_hint);
BUG_ON(ret);
ret = btrfs_alloc_extent(trans, root, inode->i_ino, 1,
alloc_hint, (u64)-1, &ins, 1);
BUG_ON(ret);
ret = btrfs_insert_file_extent(trans, root, inode->i_ino,
page->index << PAGE_CACHE_SHIFT,
ins.objectid, 1, 1);
BUG_ON(ret);
SetPageChecked(page);
kaddr = kmap(page);
memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset);
flush_dcache_page(page);
btrfs_csum_file_block(trans, root, inode->i_ino,
page->index << PAGE_CACHE_SHIFT,
kaddr, PAGE_CACHE_SIZE);
kunmap(page);
btrfs_end_transaction(trans, root);
mutex_unlock(&root->fs_info->fs_mutex);
set_page_dirty(page);
unlock_page(page);
page_cache_release(page);
out:
return ret;
}
static int btrfs_setattr(struct dentry *dentry, struct iattr *attr)
{
struct inode *inode = dentry->d_inode;
@ -469,8 +581,11 @@ static int btrfs_setattr(struct dentry *dentry, struct iattr *attr)
u64 pos = (inode->i_size + mask) & ~mask;
u64 hole_size;
if (attr->ia_size < pos)
if (attr->ia_size <= pos)
goto out;
btrfs_truncate_page(inode->i_mapping, inode->i_size);
hole_size = (attr->ia_size - pos + mask) & ~mask;
hole_size >>= inode->i_blkbits;
@ -483,10 +598,9 @@ static int btrfs_setattr(struct dentry *dentry, struct iattr *attr)
btrfs_end_transaction(trans, root);
mutex_unlock(&root->fs_info->fs_mutex);
}
out:
err = inode_setattr(inode, attr);
out:
return err;
}
static void btrfs_delete_inode(struct inode *inode)
@ -1161,17 +1275,30 @@ static int btrfs_get_block_lock(struct inode *inode, sector_t iblock,
u64 extent_end = 0;
u64 objectid = inode->i_ino;
u32 found_type;
u64 alloc_hint = 0;
struct btrfs_path *path;
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_file_extent_item *item;
struct btrfs_leaf *leaf;
struct btrfs_disk_key *found_key;
struct btrfs_trans_handle *trans = NULL;
path = btrfs_alloc_path();
BUG_ON(!path);
btrfs_init_path(path);
if (create) {
WARN_ON(1);
/* this almost but not quite works */
trans = btrfs_start_transaction(root, 1);
if (!trans) {
err = -ENOMEM;
goto out;
}
ret = drop_extents(trans, root, inode,
iblock << inode->i_blkbits,
(iblock + 1) << inode->i_blkbits,
&alloc_hint);
BUG_ON(ret);
}
ret = btrfs_lookup_file_extent(NULL, root, path,
@ -1185,7 +1312,7 @@ static int btrfs_get_block_lock(struct inode *inode, sector_t iblock,
if (ret != 0) {
if (path->slots[0] == 0) {
btrfs_release_path(root, path);
goto out;
goto not_found;
}
path->slots[0]--;
}
@ -1203,7 +1330,7 @@ static int btrfs_get_block_lock(struct inode *inode, sector_t iblock,
found_type != BTRFS_EXTENT_DATA_KEY) {
extent_end = 0;
extent_start = 0;
goto out;
goto not_found;
}
found_type = btrfs_file_extent_type(item);
extent_start = btrfs_disk_key_offset(&leaf->items[path->slots[0]].key);
@ -1211,7 +1338,7 @@ static int btrfs_get_block_lock(struct inode *inode, sector_t iblock,
extent_start = extent_start >> inode->i_blkbits;
extent_end = extent_start + btrfs_file_extent_num_blocks(item);
err = 0;
if (blocknr == 0)
if (btrfs_file_extent_disk_blocknr(item) == 0)
goto out;
if (iblock >= extent_start && iblock < extent_end) {
btrfs_map_bh_to_logical(root, result, blocknr +
@ -1227,7 +1354,7 @@ static int btrfs_get_block_lock(struct inode *inode, sector_t iblock,
extent_end = (extent_start + size) >> inode->i_blkbits;
extent_start >>= inode->i_blkbits;
if (iblock < extent_start || iblock > extent_end) {
goto out;
goto not_found;
}
ptr = btrfs_file_extent_inline_start(item);
map = kmap(result->b_page);
@ -1239,7 +1366,24 @@ static int btrfs_get_block_lock(struct inode *inode, sector_t iblock,
SetPageChecked(result->b_page);
btrfs_map_bh_to_logical(root, result, 0);
}
not_found:
if (create) {
struct btrfs_key ins;
ret = btrfs_alloc_extent(trans, root, inode->i_ino,
1, alloc_hint, (u64)-1,
&ins, 1);
BUG_ON(ret);
ret = btrfs_insert_file_extent(trans, root, inode->i_ino,
iblock << inode->i_blkbits,
ins.objectid, ins.offset,
ins.offset);
BUG_ON(ret);
SetPageChecked(result->b_page);
btrfs_map_bh_to_logical(root, result, ins.objectid);
}
out:
if (trans)
err = btrfs_end_transaction(trans, root);
btrfs_free_path(path);
return err;
}
@ -1258,7 +1402,7 @@ static int btrfs_get_block(struct inode *inode, sector_t iblock,
static int btrfs_prepare_write(struct file *file, struct page *page,
unsigned from, unsigned to)
{
return nobh_prepare_write(page, from, to, btrfs_get_block);
return block_prepare_write(page, from, to, btrfs_get_block);
}
static void btrfs_write_super(struct super_block *sb)
@ -1500,12 +1644,13 @@ static void btrfs_truncate(struct inode *inode)
if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
return;
nobh_truncate_page(inode->i_mapping, inode->i_size);
btrfs_truncate_page(inode->i_mapping, inode->i_size);
/* FIXME, add redo link to tree so we don't leak on crash */
mutex_lock(&root->fs_info->fs_mutex);
trans = btrfs_start_transaction(root, 1);
btrfs_set_trans_block_group(trans, inode);
/* FIXME, add redo link to tree so we don't leak on crash */
ret = btrfs_truncate_in_trans(trans, root, inode);
BUG_ON(ret);
btrfs_update_inode(trans, root, inode);
@ -1515,10 +1660,6 @@ static void btrfs_truncate(struct inode *inode)
btrfs_btree_balance_dirty(root);
}
/*
* Make sure any changes to nobh_commit_write() are reflected in
* nobh_truncate_page(), since it doesn't call commit_write().
*/
static int btrfs_commit_write(struct file *file, struct page *page,
unsigned from, unsigned to)
{
@ -1528,6 +1669,7 @@ static int btrfs_commit_write(struct file *file, struct page *page,
SetPageUptodate(page);
bh = page_buffers(page);
set_buffer_uptodate(bh);
if (buffer_mapped(bh) && bh->b_blocknr != 0) {
set_page_dirty(page);
}
@ -1972,8 +2114,7 @@ static ssize_t btrfs_file_write(struct file *file, const char __user *buf,
first_index = pos >> PAGE_CACHE_SHIFT;
last_index = (pos + count) >> PAGE_CACHE_SHIFT;
if ((first_index << PAGE_CACHE_SHIFT) < inode->i_size &&
(pos & (PAGE_CACHE_SIZE - 1))) {
if ((pos & (PAGE_CACHE_SIZE - 1))) {
pinned[0] = grab_cache_page(inode->i_mapping, first_index);
if (!PageUptodate(pinned[0])) {
ret = mpage_readpage(pinned[0], btrfs_get_block);
@ -1983,10 +2124,7 @@ static ssize_t btrfs_file_write(struct file *file, const char __user *buf,
unlock_page(pinned[0]);
}
}
if (first_index != last_index &&
(last_index << PAGE_CACHE_SHIFT) < inode->i_size &&
pos + count < inode->i_size &&
(count & (PAGE_CACHE_SIZE - 1))) {
if ((pos + count) & (PAGE_CACHE_SIZE - 1)) {
pinned[1] = grab_cache_page(inode->i_mapping, last_index);
if (!PageUptodate(pinned[1])) {
ret = mpage_readpage(pinned[1], btrfs_get_block);
@ -2110,23 +2248,34 @@ static int btrfs_read_actor(read_descriptor_t *desc, struct page *page,
if (!PageChecked(page)) {
/* FIXME, do it per block */
struct btrfs_root *root = BTRFS_I(inode)->root;
int ret;
struct buffer_head *bh;
int ret = btrfs_csum_verify_file_block(root,
if (page_has_buffers(page)) {
bh = page_buffers(page);
if (!buffer_mapped(bh)) {
SetPageChecked(page);
goto checked;
}
}
ret = btrfs_csum_verify_file_block(root,
page->mapping->host->i_ino,
page->index << PAGE_CACHE_SHIFT,
kmap(page), PAGE_CACHE_SIZE);
if (ret) {
if (ret != -ENOENT) {
printk("failed to verify ino %lu page %lu\n",
printk("failed to verify ino %lu page %lu ret %d\n",
page->mapping->host->i_ino,
page->index);
memset(page_address(page), 0, PAGE_CACHE_SIZE);
page->index, ret);
memset(page_address(page), 1, PAGE_CACHE_SIZE);
flush_dcache_page(page);
}
}
SetPageChecked(page);
kunmap(page);
}
checked:
/*
* Faults on the destination of a read are common, so do it before
* taking the kmap.