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Data Structures
struct	compress_options

Macros
#define	COMP_F_SWAP (1<<2)
	initial command byte is swapped with last byte in buffer to preserve payload alignment

#define	COMP_F_ADVERTISE_STUBS_ONLY (1<<3)
	tell server that we only support compression stubs

#define	COMP_F_ALLOW_STUB_ONLY (1<<4)
	Only accept stub compression, even with COMP_F_ADVERTISE_STUBS_ONLY we still accept other compressions to be pushed.

#define	COMP_F_MIGRATE (1<<5)
	push stub-v2 or comp-lzo no when we see a client with comp-lzo in occ

#define	COMP_F_ALLOW_ASYM (1<<6)
	Compression was explicitly set to allow asymetric compression.

#define	COMP_F_ALLOW_NOCOMP_ONLY (1<<7)
	Do not allow compression framing (breaks DCO)

#define	COMP_ALG_UNDEF 0

#define	COMP_ALG_STUB 1
	support compression command byte and framing without actual compression

#define	COMP_ALG_LZO 2
	LZO algorithm.

#define	COMP_ALG_SNAPPY 3
	Snappy algorithm (no longer supported)

#define	COMP_ALG_LZ4 4
	LZ4 algorithm.

#define	COMP_ALGV2_UNCOMPRESSED 10

#define	COMP_ALGV2_LZ4 11

Functions
static bool	comp_non_stub_enabled (const struct compress_options *info)

bool	check_compression_settings_valid (struct compress_options *info, int msglevel)
	Checks if the compression settings are valid.

Macro Definition Documentation

◆ COMP_ALG_LZ4

#define COMP_ALG_LZ4 4

LZ4 algorithm.

Definition at line 59 of file comp.h.

◆ COMP_ALG_LZO

#define COMP_ALG_LZO 2

LZO algorithm.

Definition at line 57 of file comp.h.

◆ COMP_ALG_SNAPPY

#define COMP_ALG_SNAPPY 3

Snappy algorithm (no longer supported)

Definition at line 58 of file comp.h.

◆ COMP_ALG_STUB

#define COMP_ALG_STUB 1

support compression command byte and framing without actual compression

Definition at line 56 of file comp.h.

◆ COMP_ALG_UNDEF

#define COMP_ALG_UNDEF 0

Definition at line 54 of file comp.h.

◆ COMP_ALGV2_LZ4

#define COMP_ALGV2_LZ4 11

Definition at line 64 of file comp.h.

◆ COMP_ALGV2_UNCOMPRESSED

#define COMP_ALGV2_UNCOMPRESSED 10

Definition at line 63 of file comp.h.

◆ COMP_F_ADVERTISE_STUBS_ONLY

#define COMP_F_ADVERTISE_STUBS_ONLY (1<<3)

tell server that we only support compression stubs

Definition at line 42 of file comp.h.

◆ COMP_F_ALLOW_ASYM

#define COMP_F_ALLOW_ASYM (1<<6)

Compression was explicitly set to allow asymetric compression.

Definition at line 49 of file comp.h.

◆ COMP_F_ALLOW_NOCOMP_ONLY

#define COMP_F_ALLOW_NOCOMP_ONLY (1<<7)

Do not allow compression framing (breaks DCO)

Definition at line 51 of file comp.h.

◆ COMP_F_ALLOW_STUB_ONLY

#define COMP_F_ALLOW_STUB_ONLY (1<<4)

Only accept stub compression, even with COMP_F_ADVERTISE_STUBS_ONLY we still accept other compressions to be pushed.

Definition at line 45 of file comp.h.

◆ COMP_F_MIGRATE

#define COMP_F_MIGRATE (1<<5)

push stub-v2 or comp-lzo no when we see a client with comp-lzo in occ

Definition at line 47 of file comp.h.

◆ COMP_F_SWAP

#define COMP_F_SWAP (1<<2)

initial command byte is swapped with last byte in buffer to preserve payload alignment

Definition at line 40 of file comp.h.

Function Documentation

◆ check_compression_settings_valid()

bool check_compression_settings_valid	(	struct compress_options *	info,
		int	msglevel
	)

Checks if the compression settings are valid.

Takes into account the flags of allow-compression and also the whether algorithms are compiled in

Definition at line 163 of file comp.c.

References compress_options::alg, COMP_ALG_LZ4, COMP_ALG_LZO, COMP_ALG_UNDEF, COMP_ALGV2_LZ4, COMP_ALGV2_UNCOMPRESSED, COMP_F_ALLOW_NOCOMP_ONLY, COMP_F_ALLOW_STUB_ONLY, comp_non_stub_enabled(), compress_options::flags, and msg.

Referenced by do_deferred_options(), multi_connection_established(), and options_postprocess_mutate().

◆ comp_non_stub_enabled()

static bool comp_non_stub_enabled ( const struct compress_options * info )

inlinestatic

Definition at line 81 of file comp.h.

References compress_options::alg, COMP_ALG_STUB, COMP_ALG_UNDEF, and COMP_ALGV2_UNCOMPRESSED.

Referenced by add_option(), check_compression_settings_valid(), options_set_backwards_compatible_options(), and show_compression_warning().

Data Structures

Macros

Functions