size_t cur_size = size;
size_t datasize;
unsigned long offset;
- int use_compress = 0;
+ int compress_type = BTRFS_COMPRESS_NONE;
if (compressed_size && compressed_pages) {
- use_compress = 1;
+ compress_type = root->fs_info->compress_type;
cur_size = compressed_size;
}
btrfs_set_file_extent_ram_bytes(leaf, ei, size);
ptr = btrfs_file_extent_inline_start(ei);
- if (use_compress) {
+ if (compress_type != BTRFS_COMPRESS_NONE) {
struct page *cpage;
int i = 0;
while (compressed_size > 0) {
compressed_size -= cur_size;
}
btrfs_set_file_extent_compression(leaf, ei,
- BTRFS_COMPRESS_ZLIB);
+ compress_type);
} else {
page = find_get_page(inode->i_mapping,
start >> PAGE_CACHE_SHIFT);
u64 compressed_size;
struct page **pages;
unsigned long nr_pages;
+ int compress_type;
struct list_head list;
};
u64 start, u64 ram_size,
u64 compressed_size,
struct page **pages,
- unsigned long nr_pages)
+ unsigned long nr_pages,
+ int compress_type)
{
struct async_extent *async_extent;
async_extent->compressed_size = compressed_size;
async_extent->pages = pages;
async_extent->nr_pages = nr_pages;
+ async_extent->compress_type = compress_type;
list_add_tail(&async_extent->list, &cow->extents);
return 0;
}
unsigned long max_uncompressed = 128 * 1024;
int i;
int will_compress;
+ int compress_type = root->fs_info->compress_type;
actual_end = min_t(u64, isize, end + 1);
again:
WARN_ON(pages);
pages = kzalloc(sizeof(struct page *) * nr_pages, GFP_NOFS);
- ret = btrfs_zlib_compress_pages(inode->i_mapping, start,
- total_compressed, pages,
- nr_pages, &nr_pages_ret,
- &total_in,
- &total_compressed,
- max_compressed);
+ if (BTRFS_I(inode)->force_compress)
+ compress_type = BTRFS_I(inode)->force_compress;
+
+ ret = btrfs_compress_pages(compress_type,
+ inode->i_mapping, start,
+ total_compressed, pages,
+ nr_pages, &nr_pages_ret,
+ &total_in,
+ &total_compressed,
+ max_compressed);
if (!ret) {
unsigned long offset = total_compressed &
* and will submit them to the elevator.
*/
add_async_extent(async_cow, start, num_bytes,
- total_compressed, pages, nr_pages_ret);
+ total_compressed, pages, nr_pages_ret,
+ compress_type);
if (start + num_bytes < end) {
start += num_bytes;
__set_page_dirty_nobuffers(locked_page);
/* unlocked later on in the async handlers */
}
- add_async_extent(async_cow, start, end - start + 1, 0, NULL, 0);
+ add_async_extent(async_cow, start, end - start + 1,
+ 0, NULL, 0, BTRFS_COMPRESS_NONE);
*num_added += 1;
}
em->block_start = ins.objectid;
em->block_len = ins.offset;
em->bdev = root->fs_info->fs_devices->latest_bdev;
+ em->compress_type = async_extent->compress_type;
set_bit(EXTENT_FLAG_PINNED, &em->flags);
set_bit(EXTENT_FLAG_COMPRESSED, &em->flags);
async_extent->ram_size - 1, 0);
}
- ret = btrfs_add_ordered_extent(inode, async_extent->start,
- ins.objectid,
- async_extent->ram_size,
- ins.offset,
- BTRFS_ORDERED_COMPRESSED);
+ ret = btrfs_add_ordered_extent_compress(inode,
+ async_extent->start,
+ ins.objectid,
+ async_extent->ram_size,
+ ins.offset,
+ BTRFS_ORDERED_COMPRESSED,
+ async_extent->compress_type);
BUG_ON(ret);
/*
struct btrfs_ordered_extent *ordered_extent = NULL;
struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
struct extent_state *cached_state = NULL;
- int compressed = 0;
+ int compress_type = 0;
int ret;
bool nolock = false;
trans->block_rsv = &root->fs_info->delalloc_block_rsv;
if (test_bit(BTRFS_ORDERED_COMPRESSED, &ordered_extent->flags))
- compressed = 1;
+ compress_type = ordered_extent->compress_type;
if (test_bit(BTRFS_ORDERED_PREALLOC, &ordered_extent->flags)) {
- BUG_ON(compressed);
+ BUG_ON(compress_type);
ret = btrfs_mark_extent_written(trans, inode,
ordered_extent->file_offset,
ordered_extent->file_offset +
ordered_extent->disk_len,
ordered_extent->len,
ordered_extent->len,
- compressed, 0, 0,
+ compress_type, 0, 0,
BTRFS_FILE_EXTENT_REG);
unpin_extent_cache(&BTRFS_I(inode)->extent_tree,
ordered_extent->file_offset,
if (test_bit(EXTENT_FLAG_COMPRESSED, &em->flags)) {
logical = em->block_start;
failrec->bio_flags = EXTENT_BIO_COMPRESSED;
+ extent_set_compress_type(&failrec->bio_flags,
+ em->compress_type);
}
failrec->logical = logical;
free_extent_map(em);
static int btrfs_setattr(struct dentry *dentry, struct iattr *attr)
{
struct inode *inode = dentry->d_inode;
+ struct btrfs_root *root = BTRFS_I(inode)->root;
int err;
+ if (btrfs_root_readonly(root))
+ return -EROFS;
+
err = inode_change_ok(inode, attr);
if (err)
return err;
size_t max_size;
unsigned long inline_size;
unsigned long ptr;
+ int compress_type;
WARN_ON(pg_offset != 0);
+ compress_type = btrfs_file_extent_compression(leaf, item);
max_size = btrfs_file_extent_ram_bytes(leaf, item);
inline_size = btrfs_file_extent_inline_item_len(leaf,
btrfs_item_nr(leaf, path->slots[0]));
read_extent_buffer(leaf, tmp, ptr, inline_size);
max_size = min_t(unsigned long, PAGE_CACHE_SIZE, max_size);
- ret = btrfs_zlib_decompress(tmp, page, extent_offset,
- inline_size, max_size);
+ ret = btrfs_decompress(compress_type, tmp, page,
+ extent_offset, inline_size, max_size);
if (ret) {
char *kaddr = kmap_atomic(page, KM_USER0);
unsigned long copy_size = min_t(u64,
struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree;
struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
struct btrfs_trans_handle *trans = NULL;
- int compressed;
+ int compress_type;
again:
read_lock(&em_tree->lock);
found_type = btrfs_file_extent_type(leaf, item);
extent_start = found_key.offset;
- compressed = btrfs_file_extent_compression(leaf, item);
+ compress_type = btrfs_file_extent_compression(leaf, item);
if (found_type == BTRFS_FILE_EXTENT_REG ||
found_type == BTRFS_FILE_EXTENT_PREALLOC) {
extent_end = extent_start +
em->block_start = EXTENT_MAP_HOLE;
goto insert;
}
- if (compressed) {
+ if (compress_type != BTRFS_COMPRESS_NONE) {
set_bit(EXTENT_FLAG_COMPRESSED, &em->flags);
+ em->compress_type = compress_type;
em->block_start = bytenr;
em->block_len = btrfs_file_extent_disk_num_bytes(leaf,
item);
em->len = (copy_size + root->sectorsize - 1) &
~((u64)root->sectorsize - 1);
em->orig_start = EXTENT_MAP_INLINE;
- if (compressed)
+ if (compress_type) {
set_bit(EXTENT_FLAG_COMPRESSED, &em->flags);
+ em->compress_type = compress_type;
+ }
ptr = btrfs_file_extent_inline_start(item) + extent_offset;
if (create == 0 && !PageUptodate(page)) {
- if (btrfs_file_extent_compression(leaf, item) ==
- BTRFS_COMPRESS_ZLIB) {
+ if (btrfs_file_extent_compression(leaf, item) !=
+ BTRFS_COMPRESS_NONE) {
ret = uncompress_inline(path, inode, page,
pg_offset,
extent_offset, item);
ei->ordered_data_close = 0;
ei->orphan_meta_reserved = 0;
ei->dummy_inode = 0;
- ei->force_compress = 0;
+ ei->force_compress = BTRFS_COMPRESS_NONE;
inode = &ei->vfs_inode;
extent_map_tree_init(&ei->extent_tree, GFP_NOFS);
static int btrfs_permission(struct inode *inode, int mask, unsigned int flags)
{
+ struct btrfs_root *root = BTRFS_I(inode)->root;
+
+ if (btrfs_root_readonly(root) && (mask & MAY_WRITE))
+ return -EROFS;
if ((BTRFS_I(inode)->flags & BTRFS_INODE_READONLY) && (mask & MAY_WRITE))
return -EACCES;
return generic_permission(inode, mask, flags, btrfs_check_acl);
git.openpandora.org / pandora-kernel.git / blobdiff