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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: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2019-10-04 02:21:48 +02:00
parent 2510307e6c
commit d20f395f98
4 changed files with 26 additions and 15 deletions
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12
fs/btrfs/compression.c
View File

@ -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" };

8
fs/btrfs/lzo.c
View File

@ -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;

8
fs/btrfs/zlib.c
View File

@ -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;

13
fs/btrfs/zstd.c
View File

@ -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 @@ static struct list_head *zstd_get_workspace(unsigned int level)
* 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;