Commit d20f395f authored by David Sterba's avatar David Sterba
Browse files

btrfs: compression: export alloc/free/get/put callbacks of all algos 



The indirect calls will be replaced by a switch in compression.c.
(Switch is faster than indirect calls with when Spectre mitigations are
enabled).

Reviewed-by: default avatarJohannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: default avatarNikolay Borisov <nborisov@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 2510307e

fs/btrfs/compression.c

+12 −0
Original line number Diff line number Diff line
@@ -36,6 +36,10 @@ int zlib_decompress_bio(struct list_head *ws, struct compressed_bio *cb); 
int zlib_decompress(struct list_head *ws, unsigned char *data_in,

		struct page *dest_page, unsigned long start_byte, size_t srclen,

		size_t destlen);

struct list_head *zlib_alloc_workspace(unsigned int level);

void zlib_free_workspace(struct list_head *ws);

struct list_head *zlib_get_workspace(unsigned int level);

void zlib_put_workspace(struct list_head *ws);



int lzo_compress_pages(struct list_head *ws, struct address_space *mapping,

		u64 start, struct page **pages, unsigned long *out_pages,
@@ -44,6 +48,10 @@ int lzo_decompress_bio(struct list_head *ws, struct compressed_bio *cb); 
int lzo_decompress(struct list_head *ws, unsigned char *data_in,

		struct page *dest_page, unsigned long start_byte, size_t srclen,

		size_t destlen);

struct list_head *lzo_alloc_workspace(unsigned int level);

void lzo_free_workspace(struct list_head *ws);

struct list_head *lzo_get_workspace(unsigned int level);

void lzo_put_workspace(struct list_head *ws);



int zstd_compress_pages(struct list_head *ws, struct address_space *mapping,

		u64 start, struct page **pages, unsigned long *out_pages,
@@ -54,6 +62,10 @@ int zstd_decompress(struct list_head *ws, unsigned char *data_in, 
		size_t destlen);

void zstd_init_workspace_manager(void);

void zstd_cleanup_workspace_manager(void);

struct list_head *zstd_alloc_workspace(unsigned int level);

void zstd_free_workspace(struct list_head *ws);

struct list_head *zstd_get_workspace(unsigned int level);

void zstd_put_workspace(struct list_head *ws);



static const char* const btrfs_compress_types[] = { "", "zlib", "lzo", "zstd" };

fs/btrfs/lzo.c

+4 −4
Original line number Diff line number Diff line
@@ -63,17 +63,17 @@ struct workspace { 


static struct workspace_manager wsm;



static struct list_head *lzo_get_workspace(unsigned int level)

struct list_head *lzo_get_workspace(unsigned int level)

{

	return btrfs_get_workspace(&wsm, level);

}



static void lzo_put_workspace(struct list_head *ws)

void lzo_put_workspace(struct list_head *ws)

{

	btrfs_put_workspace(&wsm, ws);

}



static void lzo_free_workspace(struct list_head *ws)

void lzo_free_workspace(struct list_head *ws)

{

	struct workspace *workspace = list_entry(ws, struct workspace, list);
@@ -83,7 +83,7 @@ static void lzo_free_workspace(struct list_head *ws) 
	kfree(workspace);

}



static struct list_head *lzo_alloc_workspace(unsigned int level)

struct list_head *lzo_alloc_workspace(unsigned int level)

{

	struct workspace *workspace;

fs/btrfs/zlib.c

+4 −4
Original line number Diff line number Diff line
@@ -29,7 +29,7 @@ struct workspace { 


static struct workspace_manager wsm;



static struct list_head *zlib_get_workspace(unsigned int level)

struct list_head *zlib_get_workspace(unsigned int level)

{

	struct list_head *ws = btrfs_get_workspace(&wsm, level);

	struct workspace *workspace = list_entry(ws, struct workspace, list);
@@ -39,12 +39,12 @@ static struct list_head *zlib_get_workspace(unsigned int level) 
	return ws;

}



static void zlib_put_workspace(struct list_head *ws)

void zlib_put_workspace(struct list_head *ws)

{

	btrfs_put_workspace(&wsm, ws);

}



static void zlib_free_workspace(struct list_head *ws)

void zlib_free_workspace(struct list_head *ws)

{

	struct workspace *workspace = list_entry(ws, struct workspace, list);
@@ -53,7 +53,7 @@ static void zlib_free_workspace(struct list_head *ws) 
	kfree(workspace);

}



static struct list_head *zlib_alloc_workspace(unsigned int level)

struct list_head *zlib_alloc_workspace(unsigned int level)

{

	struct workspace *workspace;

	int workspacesize;

fs/btrfs/zstd.c

+6 −7
Original line number Diff line number Diff line
@@ -91,9 +91,8 @@ static inline struct workspace *list_to_workspace(struct list_head *list) 
	return container_of(list, struct workspace, list);

}



static void zstd_free_workspace(struct list_head *ws);

static struct list_head *zstd_alloc_workspace(unsigned int level);



void zstd_free_workspace(struct list_head *ws);

struct list_head *zstd_alloc_workspace(unsigned int level);

/*

 * zstd_reclaim_timer_fn - reclaim timer

 * @t: timer
@@ -261,7 +260,7 @@ static struct list_head *zstd_find_workspace(unsigned int level) 
 * attempt to allocate a new workspace.  If we fail to allocate one due to

 * memory pressure, go to sleep waiting for the max level workspace to free up.

 */

static struct list_head *zstd_get_workspace(unsigned int level)

struct list_head *zstd_get_workspace(unsigned int level)

{

	struct list_head *ws;

	unsigned int nofs_flag;
@@ -302,7 +301,7 @@ again: 
 * isn't set, it is also set here.  Only the max level workspace tries and wakes

 * up waiting workspaces.

 */

static void zstd_put_workspace(struct list_head *ws)

void zstd_put_workspace(struct list_head *ws)

{

	struct workspace *workspace = list_to_workspace(ws);
@@ -332,7 +331,7 @@ static void zstd_put_workspace(struct list_head *ws) 
		cond_wake_up(&wsm.wait);

}



static void zstd_free_workspace(struct list_head *ws)

void zstd_free_workspace(struct list_head *ws)

{

	struct workspace *workspace = list_entry(ws, struct workspace, list);
@@ -341,7 +340,7 @@ static void zstd_free_workspace(struct list_head *ws) 
	kfree(workspace);

}



static struct list_head *zstd_alloc_workspace(unsigned int level)

struct list_head *zstd_alloc_workspace(unsigned int level)

{

	struct workspace *workspace;

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