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btrfs: plumb level through the compression interface

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Zlib compression supports multiple levels, but doesn't require changing
in how a workspace itself is created and managed. Zstd introduces a
different memory requirement such that higher levels of compression
require more memory.

This requires changes in how the alloc()/get() methods work for zstd.
This pach plumbs compression level through the interface as a parameter
in preparation for zstd compression levels.  This gives the compression
types opportunity to create/manage based on the compression level.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Dennis Zhou <dennis@kernel.org>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Dennis Zhou
2019-02-04 15:20:04 -05:00
committed by David Sterba
parent 92ee553036
commit 7bf4994304
5 changed files with 30 additions and 27 deletions
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7
fs/btrfs/compression.h
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@@ -121,7 +121,8 @@ struct workspace_manager {
void btrfs_init_workspace_manager(struct workspace_manager *wsm,
const struct btrfs_compress_op *ops);
struct list_head *btrfs_get_workspace(struct workspace_manager *wsm);
struct list_head *btrfs_get_workspace(struct workspace_manager *wsm,
unsigned int level);
void btrfs_put_workspace(struct workspace_manager *wsm, struct list_head *ws);
void btrfs_cleanup_workspace_manager(struct workspace_manager *wsm);
@@ -130,11 +131,11 @@ struct btrfs_compress_op {
void (*cleanup_workspace_manager)(void);
struct list_head *(*get_workspace)(void);
struct list_head *(*get_workspace)(unsigned int level);
void (*put_workspace)(struct list_head *ws);
struct list_head *(*alloc_workspace)(void);
struct list_head *(*alloc_workspace)(unsigned int level);
void (*free_workspace)(struct list_head *workspace);