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seccomp: allow to override errno return code #1041

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Merged
merged 1 commit into from
May 11, 2020
Merged

seccomp: allow to override errno return code #1041

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4 changes: 4 additions & 0 deletions config-linux.md
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Expand Up @@ -616,6 +616,10 @@ The following parameters can be specified to set up seccomp:
* `SCMP_ACT_ALLOW`
* `SCMP_ACT_LOG`

* **`errnoRet`** *(uint, OPTIONAL)* - the errno return code to use.
Some actions like `SCMP_ACT_ERRNO` and `SCMP_ACT_TRACE` allow to specify the errno
code to return. If not specified its default value is `EPERM`.

* **`args`** *(array of objects, OPTIONAL)* - the specific syscall in seccomp.
Each entry has the following structure:

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3 changes: 3 additions & 0 deletions schema/defs-linux.json
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Expand Up @@ -116,6 +116,9 @@
"action": {
"$ref": "#/definitions/SeccompAction"
},
"errnoRet": {
"$ref": "defs.json#/definitions/uint32"
},
"args": {
"type": "array",
"items": {
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7 changes: 4 additions & 3 deletions specs-go/config.go
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Expand Up @@ -667,9 +667,10 @@ type LinuxSeccompArg struct {

// LinuxSyscall is used to match a syscall in Seccomp
type LinuxSyscall struct {
Names []string `json:"names"`
Action LinuxSeccompAction `json:"action"`
Args []LinuxSeccompArg `json:"args,omitempty"`
Names []string `json:"names"`
Action LinuxSeccompAction `json:"action"`
ErrnoRet uint `json:"errno"`
Args []LinuxSeccompArg `json:"args,omitempty"`
}

// LinuxIntelRdt has container runtime resource constraints for Intel RDT
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