node->num_bytes);
}
}
+
+ /* Also free its reserved qgroup space */
+ btrfs_qgroup_free_delayed_ref(root->fs_info,
+ head->qgroup_ref_root,
+ head->qgroup_reserved);
return ret;
}
num_pages *= 16;
num_pages *= PAGE_CACHE_SIZE;
- ret = btrfs_check_data_free_space(inode, num_pages, num_pages);
+ ret = btrfs_check_data_free_space(inode, 0, num_pages);
if (ret)
goto out_put;
dcs = BTRFS_DC_SETUP;
else if (ret == -ENOSPC)
set_bit(BTRFS_TRANS_CACHE_ENOSPC, &trans->transaction->flags);
- btrfs_free_reserved_data_space(inode, num_pages);
+ btrfs_free_reserved_data_space(inode, 0, num_pages);
out_put:
iput(inode);
return ret;
}
-/*
- * This will check the space that the inode allocates from to make sure we have
- * enough space for bytes.
- */
-int btrfs_check_data_free_space(struct inode *inode, u64 bytes, u64 write_bytes)
+int btrfs_alloc_data_chunk_ondemand(struct inode *inode, u64 bytes)
{
struct btrfs_space_info *data_sinfo;
struct btrfs_root *root = BTRFS_I(inode)->root;
data_sinfo->flags, bytes, 1);
return -ENOSPC;
}
- ret = btrfs_qgroup_reserve(root, write_bytes);
- if (ret)
- goto out;
data_sinfo->bytes_may_use += bytes;
trace_btrfs_space_reservation(root->fs_info, "space_info",
data_sinfo->flags, bytes, 1);
-out:
spin_unlock(&data_sinfo->lock);
return ret;
}
/*
- * Called if we need to clear a data reservation for this inode.
+ * New check_data_free_space() with ability for precious data reservation
+ * Will replace old btrfs_check_data_free_space(), but for patch split,
+ * add a new function first and then replace it.
+ */
+int btrfs_check_data_free_space(struct inode *inode, u64 start, u64 len)
+{
+ struct btrfs_root *root = BTRFS_I(inode)->root;
+ int ret;
+
+ /* align the range */
+ len = round_up(start + len, root->sectorsize) -
+ round_down(start, root->sectorsize);
+ start = round_down(start, root->sectorsize);
+
+ ret = btrfs_alloc_data_chunk_ondemand(inode, len);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * Use new btrfs_qgroup_reserve_data to reserve precious data space
+ *
+ * TODO: Find a good method to avoid reserve data space for NOCOW
+ * range, but don't impact performance on quota disable case.
+ */
+ ret = btrfs_qgroup_reserve_data(inode, start, len);
+ return ret;
+}
+
+/*
+ * Called if we need to clear a data reservation for this inode
+ * Normally in a error case.
+ *
+ * This one will *NOT* use accurate qgroup reserved space API, just for case
+ * which we can't sleep and is sure it won't affect qgroup reserved space.
+ * Like clear_bit_hook().
*/
-void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes)
+void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
+ u64 len)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_space_info *data_sinfo;
- /* make sure bytes are sectorsize aligned */
- bytes = ALIGN(bytes, root->sectorsize);
+ /* Make sure the range is aligned to sectorsize */
+ len = round_up(start + len, root->sectorsize) -
+ round_down(start, root->sectorsize);
+ start = round_down(start, root->sectorsize);
data_sinfo = root->fs_info->data_sinfo;
spin_lock(&data_sinfo->lock);
- WARN_ON(data_sinfo->bytes_may_use < bytes);
- data_sinfo->bytes_may_use -= bytes;
+ if (WARN_ON(data_sinfo->bytes_may_use < len))
+ data_sinfo->bytes_may_use = 0;
+ else
+ data_sinfo->bytes_may_use -= len;
trace_btrfs_space_reservation(root->fs_info, "space_info",
- data_sinfo->flags, bytes, 0);
+ data_sinfo->flags, len, 0);
spin_unlock(&data_sinfo->lock);
}
+/*
+ * Called if we need to clear a data reservation for this inode
+ * Normally in a error case.
+ *
+ * This one will handle the per-indoe data rsv map for accurate reserved
+ * space framework.
+ */
+void btrfs_free_reserved_data_space(struct inode *inode, u64 start, u64 len)
+{
+ btrfs_free_reserved_data_space_noquota(inode, start, len);
+ btrfs_qgroup_free_data(inode, start, len);
+}
+
static void force_metadata_allocation(struct btrfs_fs_info *info)
{
struct list_head *head = &info->space_info;
if (root->fs_info->quota_enabled) {
/* One for parent inode, two for dir entries */
num_bytes = 3 * root->nodesize;
- ret = btrfs_qgroup_reserve(root, num_bytes);
+ ret = btrfs_qgroup_reserve_meta(root, num_bytes);
if (ret)
return ret;
} else {
if (ret == -ENOSPC && use_global_rsv)
ret = btrfs_block_rsv_migrate(global_rsv, rsv, num_bytes);
- if (ret) {
- if (*qgroup_reserved)
- btrfs_qgroup_free(root, *qgroup_reserved);
- }
+ if (ret && *qgroup_reserved)
+ btrfs_qgroup_free_meta(root, *qgroup_reserved);
return ret;
}
spin_unlock(&BTRFS_I(inode)->lock);
if (root->fs_info->quota_enabled) {
- ret = btrfs_qgroup_reserve(root, nr_extents * root->nodesize);
+ ret = btrfs_qgroup_reserve_meta(root,
+ nr_extents * root->nodesize);
if (ret)
goto out_fail;
}
ret = reserve_metadata_bytes(root, block_rsv, to_reserve, flush);
if (unlikely(ret)) {
- if (root->fs_info->quota_enabled)
- btrfs_qgroup_free(root, nr_extents * root->nodesize);
+ btrfs_qgroup_free_meta(root, nr_extents * root->nodesize);
goto out_fail;
}
}
/**
- * btrfs_delalloc_reserve_space - reserve data and metadata space for delalloc
+ * btrfs_delalloc_reserve_space - reserve data and metadata space for
+ * delalloc
* @inode: inode we're writing to
- * @num_bytes: the number of bytes we want to allocate
+ * @start: start range we are writing to
+ * @len: how long the range we are writing to
+ *
+ * TODO: This function will finally replace old btrfs_delalloc_reserve_space()
*
* This will do the following things
*
- * o reserve space in the data space info for num_bytes
- * o reserve space in the metadata space info based on number of outstanding
+ * o reserve space in data space info for num bytes
+ * and reserve precious corresponding qgroup space
+ * (Done in check_data_free_space)
+ *
+ * o reserve space for metadata space, based on the number of outstanding
* extents and how much csums will be needed
- * o add to the inodes ->delalloc_bytes
+ * also reserve metadata space in a per root over-reserve method.
+ * o add to the inodes->delalloc_bytes
* o add it to the fs_info's delalloc inodes list.
+ * (Above 3 all done in delalloc_reserve_metadata)
*
- * This will return 0 for success and -ENOSPC if there is no space left.
+ * Return 0 for success
+ * Return <0 for error(-ENOSPC or -EQUOT)
*/
-int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes)
+int btrfs_delalloc_reserve_space(struct inode *inode, u64 start, u64 len)
{
int ret;
- ret = btrfs_check_data_free_space(inode, num_bytes, num_bytes);
- if (ret)
- return ret;
-
- ret = btrfs_delalloc_reserve_metadata(inode, num_bytes);
- if (ret) {
- btrfs_free_reserved_data_space(inode, num_bytes);
+ ret = btrfs_check_data_free_space(inode, start, len);
+ if (ret < 0)
return ret;
- }
-
- return 0;
+ ret = btrfs_delalloc_reserve_metadata(inode, len);
+ if (ret < 0)
+ btrfs_free_reserved_data_space(inode, start, len);
+ return ret;
}
/**
* btrfs_delalloc_release_space - release data and metadata space for delalloc
* @inode: inode we're releasing space for
- * @num_bytes: the number of bytes we want to free up
+ * @start: start position of the space already reserved
+ * @len: the len of the space already reserved
*
* This must be matched with a call to btrfs_delalloc_reserve_space. This is
* called in the case that we don't need the metadata AND data reservations
* This function will release the metadata space that was not used and will
* decrement ->delalloc_bytes and remove it from the fs_info delalloc_inodes
* list if there are no delalloc bytes left.
+ * Also it will handle the qgroup reserved space.
*/
-void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes)
+void btrfs_delalloc_release_space(struct inode *inode, u64 start, u64 len)
{
- btrfs_delalloc_release_metadata(inode, num_bytes);
- btrfs_free_reserved_data_space(inode, num_bytes);
+ btrfs_delalloc_release_metadata(inode, len);
+ btrfs_free_reserved_data_space(inode, start, len);
}
static int update_block_group(struct btrfs_trans_handle *trans,
projects / cascardo / linux.git / blobdiff