#include "ctree.h"
#include "free-space-cache.h"
#include "transaction.h"
+#include "disk-io.h"
#define BITS_PER_BITMAP (PAGE_CACHE_SIZE * 8)
#define MAX_CACHE_BYTES_PER_GIG (32 * 1024)
+static void recalculate_thresholds(struct btrfs_block_group_cache
+ *block_group);
+static int link_free_space(struct btrfs_block_group_cache *block_group,
+ struct btrfs_free_space *info);
+
+struct inode *lookup_free_space_inode(struct btrfs_root *root,
+ struct btrfs_block_group_cache
+ *block_group, struct btrfs_path *path)
+{
+ struct btrfs_key key;
+ struct btrfs_key location;
+ struct btrfs_disk_key disk_key;
+ struct btrfs_free_space_header *header;
+ struct extent_buffer *leaf;
+ struct inode *inode = NULL;
+ int ret;
+
+ spin_lock(&block_group->lock);
+ if (block_group->inode)
+ inode = igrab(block_group->inode);
+ spin_unlock(&block_group->lock);
+ if (inode)
+ return inode;
+
+ key.objectid = BTRFS_FREE_SPACE_OBJECTID;
+ key.offset = block_group->key.objectid;
+ key.type = 0;
+
+ ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
+ if (ret < 0)
+ return ERR_PTR(ret);
+ if (ret > 0) {
+ btrfs_release_path(root, path);
+ return ERR_PTR(-ENOENT);
+ }
+
+ leaf = path->nodes[0];
+ header = btrfs_item_ptr(leaf, path->slots[0],
+ struct btrfs_free_space_header);
+ btrfs_free_space_key(leaf, header, &disk_key);
+ btrfs_disk_key_to_cpu(&location, &disk_key);
+ btrfs_release_path(root, path);
+
+ inode = btrfs_iget(root->fs_info->sb, &location, root, NULL);
+ if (!inode)
+ return ERR_PTR(-ENOENT);
+ if (IS_ERR(inode))
+ return inode;
+ if (is_bad_inode(inode)) {
+ iput(inode);
+ return ERR_PTR(-ENOENT);
+ }
+
+ spin_lock(&block_group->lock);
+ if (!root->fs_info->closing) {
+ block_group->inode = igrab(inode);
+ block_group->iref = 1;
+ }
+ spin_unlock(&block_group->lock);
+
+ return inode;
+}
+
+int create_free_space_inode(struct btrfs_root *root,
+ struct btrfs_trans_handle *trans,
+ struct btrfs_block_group_cache *block_group,
+ struct btrfs_path *path)
+{
+ struct btrfs_key key;
+ struct btrfs_disk_key disk_key;
+ struct btrfs_free_space_header *header;
+ struct btrfs_inode_item *inode_item;
+ struct extent_buffer *leaf;
+ u64 objectid;
+ int ret;
+
+ ret = btrfs_find_free_objectid(trans, root, 0, &objectid);
+ if (ret < 0)
+ return ret;
+
+ ret = btrfs_insert_empty_inode(trans, root, path, objectid);
+ if (ret)
+ return ret;
+
+ leaf = path->nodes[0];
+ inode_item = btrfs_item_ptr(leaf, path->slots[0],
+ struct btrfs_inode_item);
+ btrfs_item_key(leaf, &disk_key, path->slots[0]);
+ memset_extent_buffer(leaf, 0, (unsigned long)inode_item,
+ sizeof(*inode_item));
+ btrfs_set_inode_generation(leaf, inode_item, trans->transid);
+ btrfs_set_inode_size(leaf, inode_item, 0);
+ btrfs_set_inode_nbytes(leaf, inode_item, 0);
+ btrfs_set_inode_uid(leaf, inode_item, 0);
+ btrfs_set_inode_gid(leaf, inode_item, 0);
+ btrfs_set_inode_mode(leaf, inode_item, S_IFREG | 0600);
+ btrfs_set_inode_flags(leaf, inode_item, BTRFS_INODE_NOCOMPRESS |
+ BTRFS_INODE_PREALLOC | BTRFS_INODE_NODATASUM);
+ btrfs_set_inode_nlink(leaf, inode_item, 1);
+ btrfs_set_inode_transid(leaf, inode_item, trans->transid);
+ btrfs_set_inode_block_group(leaf, inode_item,
+ block_group->key.objectid);
+ btrfs_mark_buffer_dirty(leaf);
+ btrfs_release_path(root, path);
+
+ key.objectid = BTRFS_FREE_SPACE_OBJECTID;
+ key.offset = block_group->key.objectid;
+ key.type = 0;
+
+ ret = btrfs_insert_empty_item(trans, root, path, &key,
+ sizeof(struct btrfs_free_space_header));
+ if (ret < 0) {
+ btrfs_release_path(root, path);
+ return ret;
+ }
+ leaf = path->nodes[0];
+ header = btrfs_item_ptr(leaf, path->slots[0],
+ struct btrfs_free_space_header);
+ memset_extent_buffer(leaf, 0, (unsigned long)header, sizeof(*header));
+ btrfs_set_free_space_key(leaf, header, &disk_key);
+ btrfs_mark_buffer_dirty(leaf);
+ btrfs_release_path(root, path);
+
+ return 0;
+}
+
+int btrfs_truncate_free_space_cache(struct btrfs_root *root,
+ struct btrfs_trans_handle *trans,
+ struct btrfs_path *path,
+ struct inode *inode)
+{
+ loff_t oldsize;
+ int ret = 0;
+
+ trans->block_rsv = root->orphan_block_rsv;
+ ret = btrfs_block_rsv_check(trans, root,
+ root->orphan_block_rsv,
+ 0, 5);
+ if (ret)
+ return ret;
+
+ oldsize = i_size_read(inode);
+ btrfs_i_size_write(inode, 0);
+ truncate_pagecache(inode, oldsize, 0);
+
+ /*
+ * We don't need an orphan item because truncating the free space cache
+ * will never be split across transactions.
+ */
+ ret = btrfs_truncate_inode_items(trans, root, inode,
+ 0, BTRFS_EXTENT_DATA_KEY);
+ if (ret) {
+ WARN_ON(1);
+ return ret;
+ }
+
+ return btrfs_update_inode(trans, root, inode);
+}
+
+static int readahead_cache(struct inode *inode)
+{
+ struct file_ra_state *ra;
+ unsigned long last_index;
+
+ ra = kzalloc(sizeof(*ra), GFP_NOFS);
+ if (!ra)
+ return -ENOMEM;
+
+ file_ra_state_init(ra, inode->i_mapping);
+ last_index = (i_size_read(inode) - 1) >> PAGE_CACHE_SHIFT;
+
+ page_cache_sync_readahead(inode->i_mapping, ra, NULL, 0, last_index);
+
+ kfree(ra);
+
+ return 0;
+}
+
+int load_free_space_cache(struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *block_group)
+{
+ struct btrfs_root *root = fs_info->tree_root;
+ struct inode *inode;
+ struct btrfs_free_space_header *header;
+ struct extent_buffer *leaf;
+ struct page *page;
+ struct btrfs_path *path;
+ u32 *checksums = NULL, *crc;
+ char *disk_crcs = NULL;
+ struct btrfs_key key;
+ struct list_head bitmaps;
+ u64 num_entries;
+ u64 num_bitmaps;
+ u64 generation;
+ u32 cur_crc = ~(u32)0;
+ pgoff_t index = 0;
+ unsigned long first_page_offset;
+ int num_checksums;
+ int ret = 0;
+
+ /*
+ * If we're unmounting then just return, since this does a search on the
+ * normal root and not the commit root and we could deadlock.
+ */
+ smp_mb();
+ if (fs_info->closing)
+ return 0;
+
+ /*
+ * If this block group has been marked to be cleared for one reason or
+ * another then we can't trust the on disk cache, so just return.
+ */
+ spin_lock(&block_group->lock);
+ if (block_group->disk_cache_state != BTRFS_DC_WRITTEN) {
+ spin_unlock(&block_group->lock);
+ return 0;
+ }
+ spin_unlock(&block_group->lock);
+
+ INIT_LIST_HEAD(&bitmaps);
+
+ path = btrfs_alloc_path();
+ if (!path)
+ return 0;
+
+ inode = lookup_free_space_inode(root, block_group, path);
+ if (IS_ERR(inode)) {
+ btrfs_free_path(path);
+ return 0;
+ }
+
+ /* Nothing in the space cache, goodbye */
+ if (!i_size_read(inode)) {
+ btrfs_free_path(path);
+ goto out;
+ }
+
+ key.objectid = BTRFS_FREE_SPACE_OBJECTID;
+ key.offset = block_group->key.objectid;
+ key.type = 0;
+
+ ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
+ if (ret) {
+ btrfs_free_path(path);
+ goto out;
+ }
+
+ leaf = path->nodes[0];
+ header = btrfs_item_ptr(leaf, path->slots[0],
+ struct btrfs_free_space_header);
+ num_entries = btrfs_free_space_entries(leaf, header);
+ num_bitmaps = btrfs_free_space_bitmaps(leaf, header);
+ generation = btrfs_free_space_generation(leaf, header);
+ btrfs_free_path(path);
+
+ if (BTRFS_I(inode)->generation != generation) {
+ printk(KERN_ERR "btrfs: free space inode generation (%llu) did"
+ " not match free space cache generation (%llu) for "
+ "block group %llu\n",
+ (unsigned long long)BTRFS_I(inode)->generation,
+ (unsigned long long)generation,
+ (unsigned long long)block_group->key.objectid);
+ goto free_cache;
+ }
+
+ if (!num_entries)
+ goto out;
+
+ /* Setup everything for doing checksumming */
+ num_checksums = i_size_read(inode) / PAGE_CACHE_SIZE;
+ checksums = crc = kzalloc(sizeof(u32) * num_checksums, GFP_NOFS);
+ if (!checksums)
+ goto out;
+ first_page_offset = (sizeof(u32) * num_checksums) + sizeof(u64);
+ disk_crcs = kzalloc(first_page_offset, GFP_NOFS);
+ if (!disk_crcs)
+ goto out;
+
+ ret = readahead_cache(inode);
+ if (ret) {
+ ret = 0;
+ goto out;
+ }
+
+ while (1) {
+ struct btrfs_free_space_entry *entry;
+ struct btrfs_free_space *e;
+ void *addr;
+ unsigned long offset = 0;
+ unsigned long start_offset = 0;
+ int need_loop = 0;
+
+ if (!num_entries && !num_bitmaps)
+ break;
+
+ if (index == 0) {
+ start_offset = first_page_offset;
+ offset = start_offset;
+ }
+
+ page = grab_cache_page(inode->i_mapping, index);
+ if (!page) {
+ ret = 0;
+ goto free_cache;
+ }
+
+ if (!PageUptodate(page)) {
+ btrfs_readpage(NULL, page);
+ lock_page(page);
+ if (!PageUptodate(page)) {
+ unlock_page(page);
+ page_cache_release(page);
+ printk(KERN_ERR "btrfs: error reading free "
+ "space cache: %llu\n",
+ (unsigned long long)
+ block_group->key.objectid);
+ goto free_cache;
+ }
+ }
+ addr = kmap(page);
+
+ if (index == 0) {
+ u64 *gen;
+
+ memcpy(disk_crcs, addr, first_page_offset);
+ gen = addr + (sizeof(u32) * num_checksums);
+ if (*gen != BTRFS_I(inode)->generation) {
+ printk(KERN_ERR "btrfs: space cache generation"
+ " (%llu) does not match inode (%llu) "
+ "for block group %llu\n",
+ (unsigned long long)*gen,
+ (unsigned long long)
+ BTRFS_I(inode)->generation,
+ (unsigned long long)
+ block_group->key.objectid);
+ kunmap(page);
+ unlock_page(page);
+ page_cache_release(page);
+ goto free_cache;
+ }
+ crc = (u32 *)disk_crcs;
+ }
+ entry = addr + start_offset;
+
+ /* First lets check our crc before we do anything fun */
+ cur_crc = ~(u32)0;
+ cur_crc = btrfs_csum_data(root, addr + start_offset, cur_crc,
+ PAGE_CACHE_SIZE - start_offset);
+ btrfs_csum_final(cur_crc, (char *)&cur_crc);
+ if (cur_crc != *crc) {
+ printk(KERN_ERR "btrfs: crc mismatch for page %lu in "
+ "block group %llu\n", index,
+ (unsigned long long)block_group->key.objectid);
+ kunmap(page);
+ unlock_page(page);
+ page_cache_release(page);
+ goto free_cache;
+ }
+ crc++;
+
+ while (1) {
+ if (!num_entries)
+ break;
+
+ need_loop = 1;
+ e = kzalloc(sizeof(struct btrfs_free_space), GFP_NOFS);
+ if (!e) {
+ kunmap(page);
+ unlock_page(page);
+ page_cache_release(page);
+ goto free_cache;
+ }
+
+ e->offset = le64_to_cpu(entry->offset);
+ e->bytes = le64_to_cpu(entry->bytes);
+ if (!e->bytes) {
+ kunmap(page);
+ kfree(e);
+ unlock_page(page);
+ page_cache_release(page);
+ goto free_cache;
+ }
+
+ if (entry->type == BTRFS_FREE_SPACE_EXTENT) {
+ spin_lock(&block_group->tree_lock);
+ ret = link_free_space(block_group, e);
+ spin_unlock(&block_group->tree_lock);
+ BUG_ON(ret);
+ } else {
+ e->bitmap = kzalloc(PAGE_CACHE_SIZE, GFP_NOFS);
+ if (!e->bitmap) {
+ kunmap(page);
+ kfree(e);
+ unlock_page(page);
+ page_cache_release(page);
+ goto free_cache;
+ }
+ spin_lock(&block_group->tree_lock);
+ ret = link_free_space(block_group, e);
+ block_group->total_bitmaps++;
+ recalculate_thresholds(block_group);
+ spin_unlock(&block_group->tree_lock);
+ list_add_tail(&e->list, &bitmaps);
+ }
+
+ num_entries--;
+ offset += sizeof(struct btrfs_free_space_entry);
+ if (offset + sizeof(struct btrfs_free_space_entry) >=
+ PAGE_CACHE_SIZE)
+ break;
+ entry++;
+ }
+
+ /*
+ * We read an entry out of this page, we need to move on to the
+ * next page.
+ */
+ if (need_loop) {
+ kunmap(page);
+ goto next;
+ }
+
+ /*
+ * We add the bitmaps at the end of the entries in order that
+ * the bitmap entries are added to the cache.
+ */
+ e = list_entry(bitmaps.next, struct btrfs_free_space, list);
+ list_del_init(&e->list);
+ memcpy(e->bitmap, addr, PAGE_CACHE_SIZE);
+ kunmap(page);
+ num_bitmaps--;
+next:
+ unlock_page(page);
+ page_cache_release(page);
+ index++;
+ }
+
+ ret = 1;
+out:
+ kfree(checksums);
+ kfree(disk_crcs);
+ iput(inode);
+ return ret;
+
+free_cache:
+ /* This cache is bogus, make sure it gets cleared */
+ spin_lock(&block_group->lock);
+ block_group->disk_cache_state = BTRFS_DC_CLEAR;
+ spin_unlock(&block_group->lock);
+ btrfs_remove_free_space_cache(block_group);
+ goto out;
+}
+
+int btrfs_write_out_cache(struct btrfs_root *root,
+ struct btrfs_trans_handle *trans,
+ struct btrfs_block_group_cache *block_group,
+ struct btrfs_path *path)
+{
+ struct btrfs_free_space_header *header;
+ struct extent_buffer *leaf;
+ struct inode *inode;
+ struct rb_node *node;
+ struct list_head *pos, *n;
+ struct page *page;
+ struct extent_state *cached_state = NULL;
+ struct list_head bitmap_list;
+ struct btrfs_key key;
+ u64 bytes = 0;
+ u32 *crc, *checksums;
+ pgoff_t index = 0, last_index = 0;
+ unsigned long first_page_offset;
+ int num_checksums;
+ int entries = 0;
+ int bitmaps = 0;
+ int ret = 0;
+
+ root = root->fs_info->tree_root;
+
+ INIT_LIST_HEAD(&bitmap_list);
+
+ spin_lock(&block_group->lock);
+ if (block_group->disk_cache_state < BTRFS_DC_SETUP) {
+ spin_unlock(&block_group->lock);
+ return 0;
+ }
+ spin_unlock(&block_group->lock);
+
+ inode = lookup_free_space_inode(root, block_group, path);
+ if (IS_ERR(inode))
+ return 0;
+
+ if (!i_size_read(inode)) {
+ iput(inode);
+ return 0;
+ }
+
+ node = rb_first(&block_group->free_space_offset);
+ if (!node) {
+ iput(inode);
+ return 0;
+ }
+
+ last_index = (i_size_read(inode) - 1) >> PAGE_CACHE_SHIFT;
+ filemap_write_and_wait(inode->i_mapping);
+ btrfs_wait_ordered_range(inode, inode->i_size &
+ ~(root->sectorsize - 1), (u64)-1);
+
+ /* We need a checksum per page. */
+ num_checksums = i_size_read(inode) / PAGE_CACHE_SIZE;
+ crc = checksums = kzalloc(sizeof(u32) * num_checksums, GFP_NOFS);
+ if (!crc) {
+ iput(inode);
+ return 0;
+ }
+
+ /* Since the first page has all of our checksums and our generation we
+ * need to calculate the offset into the page that we can start writing
+ * our entries.
+ */
+ first_page_offset = (sizeof(u32) * num_checksums) + sizeof(u64);
+
+ /*
+ * Lock all pages first so we can lock the extent safely.
+ *
+ * NOTE: Because we hold the ref the entire time we're going to write to
+ * the page find_get_page should never fail, so we don't do a check
+ * after find_get_page at this point. Just putting this here so people
+ * know and don't freak out.
+ */
+ while (index <= last_index) {
+ page = grab_cache_page(inode->i_mapping, index);
+ if (!page) {
+ pgoff_t i = 0;
+
+ while (i < index) {
+ page = find_get_page(inode->i_mapping, i);
+ unlock_page(page);
+ page_cache_release(page);
+ page_cache_release(page);
+ i++;
+ }
+ goto out_free;
+ }
+ index++;
+ }
+
+ index = 0;
+ lock_extent_bits(&BTRFS_I(inode)->io_tree, 0, i_size_read(inode) - 1,
+ 0, &cached_state, GFP_NOFS);
+
+ /* Write out the extent entries */
+ do {
+ struct btrfs_free_space_entry *entry;
+ void *addr;
+ unsigned long offset = 0;
+ unsigned long start_offset = 0;
+
+ if (index == 0) {
+ start_offset = first_page_offset;
+ offset = start_offset;
+ }
+
+ page = find_get_page(inode->i_mapping, index);
+
+ addr = kmap(page);
+ entry = addr + start_offset;
+
+ memset(addr, 0, PAGE_CACHE_SIZE);
+ while (1) {
+ struct btrfs_free_space *e;
+
+ e = rb_entry(node, struct btrfs_free_space, offset_index);
+ entries++;
+
+ entry->offset = cpu_to_le64(e->offset);
+ entry->bytes = cpu_to_le64(e->bytes);
+ if (e->bitmap) {
+ entry->type = BTRFS_FREE_SPACE_BITMAP;
+ list_add_tail(&e->list, &bitmap_list);
+ bitmaps++;
+ } else {
+ entry->type = BTRFS_FREE_SPACE_EXTENT;
+ }
+ node = rb_next(node);
+ if (!node)
+ break;
+ offset += sizeof(struct btrfs_free_space_entry);
+ if (offset + sizeof(struct btrfs_free_space_entry) >=
+ PAGE_CACHE_SIZE)
+ break;
+ entry++;
+ }
+ *crc = ~(u32)0;
+ *crc = btrfs_csum_data(root, addr + start_offset, *crc,
+ PAGE_CACHE_SIZE - start_offset);
+ kunmap(page);
+
+ btrfs_csum_final(*crc, (char *)crc);
+ crc++;
+
+ bytes += PAGE_CACHE_SIZE;
+
+ ClearPageChecked(page);
+ set_page_extent_mapped(page);
+ SetPageUptodate(page);
+ set_page_dirty(page);
+
+ /*
+ * We need to release our reference we got for grab_cache_page,
+ * except for the first page which will hold our checksums, we
+ * do that below.
+ */
+ if (index != 0) {
+ unlock_page(page);
+ page_cache_release(page);
+ }
+
+ page_cache_release(page);
+
+ index++;
+ } while (node);
+
+ /* Write out the bitmaps */
+ list_for_each_safe(pos, n, &bitmap_list) {
+ void *addr;
+ struct btrfs_free_space *entry =
+ list_entry(pos, struct btrfs_free_space, list);
+
+ page = find_get_page(inode->i_mapping, index);
+
+ addr = kmap(page);
+ memcpy(addr, entry->bitmap, PAGE_CACHE_SIZE);
+ *crc = ~(u32)0;
+ *crc = btrfs_csum_data(root, addr, *crc, PAGE_CACHE_SIZE);
+ kunmap(page);
+ btrfs_csum_final(*crc, (char *)crc);
+ crc++;
+ bytes += PAGE_CACHE_SIZE;
+
+ ClearPageChecked(page);
+ set_page_extent_mapped(page);
+ SetPageUptodate(page);
+ set_page_dirty(page);
+ unlock_page(page);
+ page_cache_release(page);
+ page_cache_release(page);
+ list_del_init(&entry->list);
+ index++;
+ }
+
+ /* Zero out the rest of the pages just to make sure */
+ while (index <= last_index) {
+ void *addr;
+
+ page = find_get_page(inode->i_mapping, index);
+
+ addr = kmap(page);
+ memset(addr, 0, PAGE_CACHE_SIZE);
+ kunmap(page);
+ ClearPageChecked(page);
+ set_page_extent_mapped(page);
+ SetPageUptodate(page);
+ set_page_dirty(page);
+ unlock_page(page);
+ page_cache_release(page);
+ page_cache_release(page);
+ bytes += PAGE_CACHE_SIZE;
+ index++;
+ }
+
+ btrfs_set_extent_delalloc(inode, 0, bytes - 1, &cached_state);
+
+ /* Write the checksums and trans id to the first page */
+ {
+ void *addr;
+ u64 *gen;
+
+ page = find_get_page(inode->i_mapping, 0);
+
+ addr = kmap(page);
+ memcpy(addr, checksums, sizeof(u32) * num_checksums);
+ gen = addr + (sizeof(u32) * num_checksums);
+ *gen = trans->transid;
+ kunmap(page);
+ ClearPageChecked(page);
+ set_page_extent_mapped(page);
+ SetPageUptodate(page);
+ set_page_dirty(page);
+ unlock_page(page);
+ page_cache_release(page);
+ page_cache_release(page);
+ }
+ BTRFS_I(inode)->generation = trans->transid;
+
+ unlock_extent_cached(&BTRFS_I(inode)->io_tree, 0,
+ i_size_read(inode) - 1, &cached_state, GFP_NOFS);
+
+ filemap_write_and_wait(inode->i_mapping);
+
+ key.objectid = BTRFS_FREE_SPACE_OBJECTID;
+ key.offset = block_group->key.objectid;
+ key.type = 0;
+
+ ret = btrfs_search_slot(trans, root, &key, path, 1, 1);
+ if (ret < 0) {
+ ret = 0;
+ clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, bytes - 1,
+ EXTENT_DIRTY | EXTENT_DELALLOC |
+ EXTENT_DO_ACCOUNTING, 0, 0, NULL, GFP_NOFS);
+ goto out_free;
+ }
+ leaf = path->nodes[0];
+ if (ret > 0) {
+ struct btrfs_key found_key;
+ BUG_ON(!path->slots[0]);
+ path->slots[0]--;
+ btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);
+ if (found_key.objectid != BTRFS_FREE_SPACE_OBJECTID ||
+ found_key.offset != block_group->key.objectid) {
+ ret = 0;
+ clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, bytes - 1,
+ EXTENT_DIRTY | EXTENT_DELALLOC |
+ EXTENT_DO_ACCOUNTING, 0, 0, NULL,
+ GFP_NOFS);
+ btrfs_release_path(root, path);
+ goto out_free;
+ }
+ }
+ header = btrfs_item_ptr(leaf, path->slots[0],
+ struct btrfs_free_space_header);
+ btrfs_set_free_space_entries(leaf, header, entries);
+ btrfs_set_free_space_bitmaps(leaf, header, bitmaps);
+ btrfs_set_free_space_generation(leaf, header, trans->transid);
+ btrfs_mark_buffer_dirty(leaf);
+ btrfs_release_path(root, path);
+
+ ret = 1;
+
+out_free:
+ if (ret == 0) {
+ invalidate_inode_pages2_range(inode->i_mapping, 0, index);
+ spin_lock(&block_group->lock);
+ block_group->disk_cache_state = BTRFS_DC_ERROR;
+ spin_unlock(&block_group->lock);
+ BTRFS_I(inode)->generation = 0;
+ }
+ kfree(checksums);
+ btrfs_update_inode(trans, root, inode);
+ iput(inode);
+ return ret;
+}
+
static inline unsigned long offset_to_bit(u64 bitmap_start, u64 sectorsize,
u64 offset)
{
projects / mv-sheeva.git / blobdiff