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Merge branch 'cleanups' of git://repo.or.cz/linux-2.6/btrfs-unstable into inode_numbers

Browse Source 
Conflicts:
	fs/btrfs/extent-tree.c
	fs/btrfs/free-space-cache.c
	fs/btrfs/inode.c
	fs/btrfs/tree-log.c

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2011-05-22 12:33:42 -04:00
parent 0d0ca30f18 4ea028859b
commit 945d8962ce
38 changed files with 295 additions and 3234 deletions
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297
fs/btrfs/inode.c
View File

@ -37,6 +37,7 @@
#include <linux/posix_acl.h>
#include <linux/falloc.h>
#include <linux/slab.h>
#include <linux/ratelimit.h>
#include "compat.h"
#include "ctree.h"
#include "disk-io.h"
@ -650,7 +651,7 @@ retry:
async_extent->start +
async_extent->ram_size - 1, 0);
em = alloc_extent_map(GFP_NOFS);
em = alloc_extent_map();
BUG_ON(!em);
em->start = async_extent->start;
em->len = async_extent->ram_size;
@ -836,7 +837,7 @@ static noinline int cow_file_range(struct inode *inode,
(u64)-1, &ins, 1);
BUG_ON(ret);
em = alloc_extent_map(GFP_NOFS);
em = alloc_extent_map();
BUG_ON(!em);
em->start = start;
em->orig_start = em->start;
@ -1176,7 +1177,7 @@ out_check:
goto next_slot;
}
btrfs_release_path(root, path);
btrfs_release_path(path);
if (cow_start != (u64)-1) {
ret = cow_file_range(inode, locked_page, cow_start,
found_key.offset - 1, page_started,
@ -1189,7 +1190,7 @@ out_check:
struct extent_map *em;
struct extent_map_tree *em_tree;
em_tree = &BTRFS_I(inode)->extent_tree;
em = alloc_extent_map(GFP_NOFS);
em = alloc_extent_map();
BUG_ON(!em);
em->start = cur_offset;
em->orig_start = em->start;
@ -1234,7 +1235,7 @@ out_check:
if (cur_offset > end)
break;
}
btrfs_release_path(root, path);
btrfs_release_path(path);
if (cur_offset <= end && cow_start == (u64)-1)
cow_start = cur_offset;
@ -1865,7 +1866,7 @@ static int btrfs_io_failed_hook(struct bio *failed_bio,
}
read_unlock(&em_tree->lock);
if (!em || IS_ERR(em)) {
if (IS_ERR_OR_NULL(em)) {
kfree(failrec);
return -EIO;
}
@ -2014,13 +2015,11 @@ good:
return 0;
zeroit:
if (printk_ratelimit()) {
printk(KERN_INFO "btrfs csum failed ino %llu off %llu csum %u "
printk_ratelimited(KERN_INFO "btrfs csum failed ino %llu off %llu csum %u "
"private %llu\n",
(unsigned long long)btrfs_ino(page->mapping->host),
(unsigned long long)start, csum,
(unsigned long long)private);
}
memset(kaddr + offset, 1, end - start + 1);
flush_dcache_page(page);
kunmap_atomic(kaddr, KM_USER0);
@ -2357,7 +2356,7 @@ int btrfs_orphan_cleanup(struct btrfs_root *root)
break;
/* release the path since we're done with it */
btrfs_release_path(root, path);
btrfs_release_path(path);
/*
* this is where we are basically btrfs_lookup, without the
@ -2740,7 +2739,7 @@ static int __btrfs_unlink_inode(struct btrfs_trans_handle *trans,
ret = btrfs_delete_one_dir_name(trans, root, path, di);
if (ret)
goto err;
btrfs_release_path(root, path);
btrfs_release_path(path);
ret = btrfs_del_inode_ref(trans, root, name, name_len, ino,
dir_ino, &index);
@ -2882,7 +2881,7 @@ static struct btrfs_trans_handle *__unlink_start_trans(struct inode *dir,
} else {
check_link = 0;
}
btrfs_release_path(root, path);
btrfs_release_path(path);
ret = btrfs_lookup_inode(trans, root, path,
&BTRFS_I(inode)->location, 0);
@ -2896,7 +2895,7 @@ static struct btrfs_trans_handle *__unlink_start_trans(struct inode *dir,
} else {
check_link = 0;
}
btrfs_release_path(root, path);
btrfs_release_path(path);
if (ret == 0 && S_ISREG(inode->i_mode)) {
ret = btrfs_lookup_file_extent(trans, root, path,
@ -2908,7 +2907,7 @@ static struct btrfs_trans_handle *__unlink_start_trans(struct inode *dir,
BUG_ON(ret == 0);
if (check_path_shared(root, path))
goto out;
btrfs_release_path(root, path);
btrfs_release_path(path);
}
if (!check_link) {
@ -2929,7 +2928,7 @@ static struct btrfs_trans_handle *__unlink_start_trans(struct inode *dir,
err = 0;
goto out;
}
btrfs_release_path(root, path);
btrfs_release_path(path);
ref = btrfs_lookup_inode_ref(trans, root, path,
dentry->d_name.name, dentry->d_name.len,
@ -2942,7 +2941,7 @@ static struct btrfs_trans_handle *__unlink_start_trans(struct inode *dir,
if (check_path_shared(root, path))
goto out;
index = btrfs_inode_ref_index(path->nodes[0], ref);
btrfs_release_path(root, path);
btrfs_release_path(path);
/*
* This is a commit root search, if we can lookup inode item and other
@ -3035,14 +3034,14 @@ int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
di = btrfs_lookup_dir_item(trans, root, path, dir_ino,
name, name_len, -1);
BUG_ON(!di || IS_ERR(di));
BUG_ON(IS_ERR_OR_NULL(di));
leaf = path->nodes[0];
btrfs_dir_item_key_to_cpu(leaf, di, &key);
WARN_ON(key.type != BTRFS_ROOT_ITEM_KEY || key.objectid != objectid);
ret = btrfs_delete_one_dir_name(trans, root, path, di);
BUG_ON(ret);
btrfs_release_path(root, path);
btrfs_release_path(path);
ret = btrfs_del_root_ref(trans, root->fs_info->tree_root,
objectid, root->root_key.objectid,
@ -3051,14 +3050,14 @@ int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
BUG_ON(ret != -ENOENT);
di = btrfs_search_dir_index_item(root, path, dir_ino,
name, name_len);
BUG_ON(!di || IS_ERR(di));
BUG_ON(IS_ERR_OR_NULL(di));
leaf = path->nodes[0];
btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);
btrfs_release_path(root, path);
btrfs_release_path(path);
index = key.offset;
}
btrfs_release_path(root, path);
btrfs_release_path(path);
ret = btrfs_delete_delayed_dir_index(trans, root, dir, index);
BUG_ON(ret);
@ -3114,178 +3113,6 @@ out:
return err;
}
#if 0
/*
* when truncating bytes in a file, it is possible to avoid reading
* the leaves that contain only checksum items. This can be the
* majority of the IO required to delete a large file, but it must
* be done carefully.
*
* The keys in the level just above the leaves are checked to make sure
* the lowest key in a given leaf is a csum key, and starts at an offset
* after the new size.
*
* Then the key for the next leaf is checked to make sure it also has
* a checksum item for the same file. If it does, we know our target leaf
* contains only checksum items, and it can be safely freed without reading
* it.
*
* This is just an optimization targeted at large files. It may do
* nothing. It will return 0 unless things went badly.
*/
static noinline int drop_csum_leaves(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path,
struct inode *inode, u64 new_size)
{
struct btrfs_key key;
int ret;
int nritems;
struct btrfs_key found_key;
struct btrfs_key other_key;
struct btrfs_leaf_ref *ref;
u64 leaf_gen;
u64 leaf_start;
path->lowest_level = 1;
key.objectid = inode->i_ino;
key.type = BTRFS_CSUM_ITEM_KEY;
key.offset = new_size;
again:
ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
if (ret < 0)
goto out;
if (path->nodes[1] == NULL) {
ret = 0;
goto out;
}
ret = 0;
btrfs_node_key_to_cpu(path->nodes[1], &found_key, path->slots[1]);
nritems = btrfs_header_nritems(path->nodes[1]);
if (!nritems)
goto out;
if (path->slots[1] >= nritems)
goto next_node;
/* did we find a key greater than anything we want to delete? */
if (found_key.objectid > inode->i_ino ||
(found_key.objectid == inode->i_ino && found_key.type > key.type))
goto out;
/* we check the next key in the node to make sure the leave contains
* only checksum items. This comparison doesn't work if our
* leaf is the last one in the node
*/
if (path->slots[1] + 1 >= nritems) {
next_node:
/* search forward from the last key in the node, this
* will bring us into the next node in the tree
*/
btrfs_node_key_to_cpu(path->nodes[1], &found_key, nritems - 1);
/* unlikely, but we inc below, so check to be safe */
if (found_key.offset == (u64)-1)
goto out;
/* search_forward needs a path with locks held, do the
* search again for the original key. It is possible
* this will race with a balance and return a path that
* we could modify, but this drop is just an optimization
* and is allowed to miss some leaves.
*/
btrfs_release_path(root, path);
found_key.offset++;
/* setup a max key for search_forward */
other_key.offset = (u64)-1;
other_key.type = key.type;
other_key.objectid = key.objectid;
path->keep_locks = 1;
ret = btrfs_search_forward(root, &found_key, &other_key,
path, 0, 0);
path->keep_locks = 0;
if (ret || found_key.objectid != key.objectid ||
found_key.type != key.type) {
ret = 0;
goto out;
}
key.offset = found_key.offset;
btrfs_release_path(root, path);
cond_resched();
goto again;
}
/* we know there's one more slot after us in the tree,
* read that key so we can verify it is also a checksum item
*/
btrfs_node_key_to_cpu(path->nodes[1], &other_key, path->slots[1] + 1);
if (found_key.objectid < inode->i_ino)
goto next_key;
if (found_key.type != key.type || found_key.offset < new_size)
goto next_key;
/*
* if the key for the next leaf isn't a csum key from this objectid,
* we can't be sure there aren't good items inside this leaf.
* Bail out
*/
if (other_key.objectid != inode->i_ino || other_key.type != key.type)
goto out;
leaf_start = btrfs_node_blockptr(path->nodes[1], path->slots[1]);
leaf_gen = btrfs_node_ptr_generation(path->nodes[1], path->slots[1]);
/*
* it is safe to delete this leaf, it contains only
* csum items from this inode at an offset >= new_size
*/
ret = btrfs_del_leaf(trans, root, path, leaf_start);
BUG_ON(ret);
if (root->ref_cows && leaf_gen < trans->transid) {
ref = btrfs_alloc_leaf_ref(root, 0);
if (ref) {
ref->root_gen = root->root_key.offset;
ref->bytenr = leaf_start;
ref->owner = 0;
ref->generation = leaf_gen;
ref->nritems = 0;
btrfs_sort_leaf_ref(ref);
ret = btrfs_add_leaf_ref(root, ref, 0);
WARN_ON(ret);
btrfs_free_leaf_ref(root, ref);
} else {
WARN_ON(1);
}
}
next_key:
btrfs_release_path(root, path);
if (other_key.objectid == inode->i_ino &&
other_key.type == key.type && other_key.offset > key.offset) {
key.offset = other_key.offset;
cond_resched();
goto again;
}
ret = 0;
out:
/* fixup any changes we've made to the path */
path->lowest_level = 0;
path->keep_locks = 0;
btrfs_release_path(root, path);
return ret;
}
#endif
/*
* this can truncate away extent items, csum items and directory items.
* It starts at a high offset and removes keys until it can't find
@ -3510,7 +3337,7 @@ delete:
BUG_ON(ret);
pending_del_nr = 0;
}
btrfs_release_path(root, path);
btrfs_release_path(path);
goto search_again;
} else {
path->slots[0]--;
@ -3668,7 +3495,7 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size)
while (1) {
em = btrfs_get_extent(inode, NULL, 0, cur_offset,
block_end - cur_offset, 0);
BUG_ON(IS_ERR(em) || !em);
BUG_ON(IS_ERR_OR_NULL(em));
last_byte = min(extent_map_end(em), block_end);
last_byte = (last_byte + mask) & ~mask;
if (!test_bit(EXTENT_FLAG_PREALLOC, &em->flags)) {
@ -3878,7 +3705,7 @@ static int btrfs_inode_by_name(struct inode *dir, struct dentry *dentry,
if (IS_ERR(di))
ret = PTR_ERR(di);
if (!di || IS_ERR(di))
if (IS_ERR_OR_NULL(di))
goto out_err;
btrfs_dir_item_key_to_cpu(path->nodes[0], di, location);
@ -3936,7 +3763,7 @@ static int fixup_tree_root_location(struct btrfs_root *root,
if (ret)
goto out;
btrfs_release_path(root->fs_info->tree_root, path);
btrfs_release_path(path);
new_root = btrfs_read_fs_root_no_name(root->fs_info, location);
if (IS_ERR(new_root)) {
@ -4479,24 +4306,20 @@ void btrfs_dirty_inode(struct inode *inode)
btrfs_end_transaction(trans, root);
trans = btrfs_start_transaction(root, 1);
if (IS_ERR(trans)) {
if (printk_ratelimit()) {
printk(KERN_ERR "btrfs: fail to "
printk_ratelimited(KERN_ERR "btrfs: fail to "
"dirty inode %llu error %ld\n",
(unsigned long long)btrfs_ino(inode),
PTR_ERR(trans));
}
return;
}
btrfs_set_trans_block_group(trans, inode);
ret = btrfs_update_inode(trans, root, inode);
if (ret) {
if (printk_ratelimit()) {
printk(KERN_ERR "btrfs: fail to "
printk_ratelimited(KERN_ERR "btrfs: fail to "
"dirty inode %llu error %d\n",
(unsigned long long)btrfs_ino(inode),
ret);
}
}
}
btrfs_end_transaction(trans, root);
@ -5146,7 +4969,7 @@ again:
else
goto out;
}
em = alloc_extent_map(GFP_NOFS);
em = alloc_extent_map();
if (!em) {
err = -ENOMEM;
goto out;
@ -5300,7 +5123,7 @@ again:
kunmap(page);
free_extent_map(em);
em = NULL;
btrfs_release_path(root, path);
btrfs_release_path(path);
trans = btrfs_join_transaction(root, 1);
if (IS_ERR(trans))
return ERR_CAST(trans);
@ -5326,7 +5149,7 @@ not_found_em:
em->block_start = EXTENT_MAP_HOLE;
set_bit(EXTENT_FLAG_VACANCY, &em->flags);
insert:
btrfs_release_path(root, path);
btrfs_release_path(path);
if (em->start > start || extent_map_end(em) <= start) {
printk(KERN_ERR "Btrfs: bad extent! em: [%llu %llu] passed "
"[%llu %llu]\n", (unsigned long long)em->start,
@ -5459,7 +5282,7 @@ struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *pag
u64 hole_start = start;
u64 hole_len = len;
em = alloc_extent_map(GFP_NOFS);
em = alloc_extent_map();
if (!em) {
err = -ENOMEM;
goto out;
@ -5560,7 +5383,7 @@ static struct extent_map *btrfs_new_extent_direct(struct inode *inode,
}
if (!em) {
em = alloc_extent_map(GFP_NOFS);
em = alloc_extent_map();
if (!em) {
em = ERR_PTR(-ENOMEM);
goto out;
@ -6865,9 +6688,9 @@ struct inode *btrfs_alloc_inode(struct super_block *sb)
ei->delayed_node = NULL;
inode = &ei->vfs_inode;
extent_map_tree_init(&ei->extent_tree, GFP_NOFS);
extent_io_tree_init(&ei->io_tree, &inode->i_data, GFP_NOFS);
extent_io_tree_init(&ei->io_failure_tree, &inode->i_data, GFP_NOFS);
extent_map_tree_init(&ei->extent_tree);
extent_io_tree_init(&ei->io_tree, &inode->i_data);
extent_io_tree_init(&ei->io_failure_tree, &inode->i_data);
mutex_init(&ei->log_mutex);
btrfs_ordered_inode_tree_init(&ei->ordered_tree);
INIT_LIST_HEAD(&ei->i_orphan);
@ -7265,58 +7088,6 @@ int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput)
return 0;
}
int btrfs_start_one_delalloc_inode(struct btrfs_root *root, int delay_iput,
int sync)
{
struct btrfs_inode *binode;
struct inode *inode = NULL;
spin_lock(&root->fs_info->delalloc_lock);
while (!list_empty(&root->fs_info->delalloc_inodes)) {
binode = list_entry(root->fs_info->delalloc_inodes.next,
struct btrfs_inode, delalloc_inodes);
inode = igrab(&binode->vfs_inode);
if (inode) {
list_move_tail(&binode->delalloc_inodes,
&root->fs_info->delalloc_inodes);
break;
}
list_del_init(&binode->delalloc_inodes);
cond_resched_lock(&root->fs_info->delalloc_lock);
}
spin_unlock(&root->fs_info->delalloc_lock);
if (inode) {
if (sync) {
filemap_write_and_wait(inode->i_mapping);
/*
* We have to do this because compression doesn't
* actually set PG_writeback until it submits the pages
* for IO, which happens in an async thread, so we could
* race and not actually wait for any writeback pages
* because they've not been submitted yet. Technically
* this could still be the case for the ordered stuff
* since the async thread may not have started to do its
* work yet. If this becomes the case then we need to
* figure out a way to make sure that in writepage we
* wait for any async pages to be submitted before
* returning so that fdatawait does what its supposed to
* do.
*/
btrfs_wait_ordered_range(inode, 0, (u64)-1);
} else {
filemap_flush(inode->i_mapping);
}
if (delay_iput)
btrfs_add_delayed_iput(inode);
else
iput(inode);
return 1;
}
return 0;
}
static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
const char *symname)
{