Function report |
Source Code:block\bio-integrity.c |
Create Date:2022-07-28 18:02:11 |
Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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Name:_integrity_alloc - Allocate integrity payload and attach it to bio*@bio: bio to attach integrity metadata to*@gfp_mask: Memory allocation mask*@nr_vecs: Number of integrity metadata scatter-gather elements* Description: This function prepares a bio for
Proto:struct bio_integrity_payload *bio_integrity_alloc(struct bio *bio, gfp_t gfp_mask, unsigned int nr_vecs)
Type:struct bio_integrity_payload
Parameter:
Type | Parameter | Name |
---|---|---|
struct bio * | bio | |
gfp_t | gfp_mask | |
unsigned int | nr_vecs |
45 | If Not bs || Not mempool_initialized( & bio_integrity_pool) Then |
46 | bip = Allocation memory |
47 | inline_vecs = nr_vecs |
48 | Else |
53 | If Value for the false possibility is greater at compile time(!bip) Then Return ERR_PTR( - ENOMEM) |
58 | If nr_vecs > inline_vecs Then |
59 | idx = 0 |
61 | bip_vec = bvec_alloc(gfp_mask, nr_vecs, & idx, & bvec_integrity_pool) |
67 | Else |
72 | parent bio = bio |
73 | data integrity = bip |
76 | Return bip |
77 | err : |
Name | Describe |
---|---|
bio_integrity_prep | _integrity_prep - Prepare bio for integrity I/O*@bio: bio to prepare* Description: Checks if the bio already has an integrity payload attached.* If it does, the payload has been generated by another kernel subsystem,* and we just pass it through |
bio_integrity_clone | _integrity_clone - Callback for cloning bios with integrity metadata*@bio: New bio*@bio_src: Original bio*@gfp_mask: Memory allocation mask* Description: Called to allocate a bip when cloning a bio |
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