Add the ability to pass additional attributes along with read/write. Application can prepare attibute specific information and pass its address using the SQE field: __u64 attr_ptr; Along with setting a mask indicating attributes being passed: __u64 attr_type_mask; Overall 64 attributes are allowed and currently one attribute 'IORING_RW_ATTR_FLAG_PI' is supported. With PI attribute, userspace can pass following information: - flags: integrity check flags IO_INTEGRITY_CHK_{GUARD/APPTAG/REFTAG} - len: length of PI/metadata buffer - addr: address of metadata buffer - seed: seed value for reftag remapping - app_tag: application defined 16b value Process this information to prepare uio_meta_descriptor and pass it down using kiocb->private. PI attribute is supported only for direct IO.
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| @@ -98,6 +98,10 @@ struct io_uring_sqe { · 97 unmodified lines | ||
| 98 | 98 | __u64 addr3; |
| 99 | 99 | __u64 __pad2[1]; |
| 100 | 100 | }; |
| 101 | + struct { | |
| 102 | + __u64 attr_ptr; /* pointer to attribute information */ | |
| 103 | + __u64 attr_type_mask; /* bit mask of attributes */ | |
| 104 | + }; | |
| 101 | 105 | __u64 optval; |
| 102 | 106 | /* |
| 103 | 107 | * If the ring is initialized with IORING_SETUP_SQE128, then |
| @@ -107,6 +111,18 @@ struct io_uring_sqe { · 3 unmodified lines | ||
| 107 | 111 | }; |
| 108 | 112 | }; |
| 109 | 113 | |
| 114 | +/* sqe->attr_type_mask flags */ | |
| 115 | +#define IORING_RW_ATTR_FLAG_PI (1U << 0) | |
| 116 | +/* PI attribute information */ | |
| 117 | +struct io_uring_attr_pi { | |
| 118 | + __u16 flags; | |
| 119 | + __u16 app_tag; | |
| 120 | + __u32 len; | |
| 121 | + __u64 addr; | |
| 122 | + __u64 seed; | |
| 123 | + __u64 rsvd; | |
| 124 | +}; | |
| 125 | + | |
| 110 | 126 | /* |
| 111 | 127 | * If sqe->file_index is set to this for opcodes that instantiate a new |
| 112 | 128 | * direct descriptor (like openat/openat2/accept), then io_uring will allocate |