Lines Matching +full:trim +full:- +full:data +full:- +full:valid

1 /* SPDX-License-Identifier: GPL-2.0-only */
6 	/* receiver (data socket) */
15 	P_DATA_REQUEST	      = 0x08, /* Used to ask for a data block */
16 	P_RS_DATA_REQUEST     = 0x09, /* Used to ask for a data block for resync */
33 	P_SUPERSEDED	      = 0x18, /* Used in proto C, two-primaries conflict detection */
42 	P_OV_REQUEST	      = 0x1e, /* data socket */
45 	P_CSUM_RS_REQUEST     = 0x21, /* data socket */
47 	P_SYNC_PARAM89	      = 0x23, /* data socket, protocol version 89 replacement for P_SYNC_PARAM */
52 	P_OUT_OF_SYNC         = 0x28, /* Mark as out of sync (Outrunning), data socket */
54 	P_CONN_ST_CHG_REQ     = 0x2a, /* data sock: Connection wide state request */
57 	P_PROTOCOL_UPDATE     = 0x2d, /* data sock: is used in established connections */
61 	 * which is why I chose TRIM here, to disambiguate. */
74 	P_ZEROES              = 0x36, /* data sock: zero-out, WRITE_ZEROES */
106 	u16	  length;	/* bytes of data after this header */
109 /* Header for big packets, Used for data packets exceeding 64kB */
154 	u32	    size;	/* == bio->bi_size */
159 	u32           size;     /* == bio->bi_size */
166  *   P_SUPERSEDED (proto C, two-primaries conflict detection)
193 /* supports TRIM/DISCARD on the "wire" protocol */
196 /* Detect all-zeros during resync, and rather TRIM/UNMAP/DISCARD those blocks
203  *   - indicates support for 128 MiB "batch bios",
206  *   - indicates that we exchange additional settings in p_sizes
214  * guarantee that discard zeroes data, the receiving side would map discard
215  * back to zero-out.
220  * UNMAP if possible, zero-out the rest.
224  * While an un-allocated block on dm-thin reads as zeroes, on a dm-thin
229  * If we cannot distinguish between zero-out and discard on the receiving
231  * on supposedly zero-initialized blocks, we'd need to map all discards to
232  * zero-out on the receiving side.  But that would potentially do a full
234  * unmap/trim/discard/de-allocate.
237  * zeroes (and thus use zero-out, potentially doing the mentioned full-alloc),
239  * zeroing" (by "discarding" blocks aligned to discard-granularity, and zeroing
241  * avoid "false positives" in an online-verify later, hoping that someone
397 /* Valid values for the encoding field.