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88e4e4c82e
Add three new capabilities that would otherwise be reported as unknown. Also add an e2e test making sure that `podman top` knows all capabilities of the current kernel. I refrained from adding a system test since this may blow up in gating tests. Signed-off-by: Valentin Rothberg <vrothberg@redhat.com>
93 lines
2.5 KiB
Go
93 lines
2.5 KiB
Go
// Copyright 2018 psgo authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package capabilities provides a mapping from common kernel bit masks to the
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// alphanumerical representation of kernel capabilities. See capabilities(7)
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// for additional information.
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package capabilities
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var (
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// capabilities are a mapping from a numerical value to the textual
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// representation of a given capability. A map allows to easily check
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// if a given value is included or not.
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//
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// NOTE: this map must be maintained and kept in sync with the
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// ./include/uapi/linux/capability.h kernel header.
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capabilities = map[uint]string{
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0: "CHOWN",
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1: "DAC_OVERRIDE",
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2: "DAC_READ_SEARCH",
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3: "FOWNER",
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4: "FSETID",
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5: "KILL",
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6: "SETGID",
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7: "SETUID",
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8: "SETPCAP",
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9: "LINUX_IMMUTABLE",
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10: "NET_BIND_SERVICE",
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11: "NET_BROADCAST",
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12: "NET_ADMIN",
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13: "NET_RAW",
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14: "IPC_LOCK",
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15: "IPC_OWNER",
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16: "SYS_MODULE",
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17: "SYS_RAWIO",
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18: "SYS_CHROOT",
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19: "SYS_PTRACE",
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20: "SYS_PACCT",
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21: "SYS_ADMIN",
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22: "SYS_BOOT",
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23: "SYS_NICE",
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24: "SYS_RESOURCE",
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25: "SYS_TIME",
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26: "SYS_TTY_CONFIG",
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27: "MKNOD",
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28: "LEASE",
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29: "AUDIT_WRITE",
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30: "AUDIT_CONTROL",
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31: "SETFCAP",
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32: "MAC_OVERRIDE",
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33: "MAC_ADMIN",
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34: "SYSLOG",
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35: "WAKE_ALARM",
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36: "BLOCK_SUSPEND",
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37: "AUDIT_READ",
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38: "PERFMON",
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39: "BPF",
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40: "CHECKPOINT_RESTORE",
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}
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// FullCAPs represents the value of a bitmask with a full capability
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// set.
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FullCAPs = uint64(0x1FFFFFFFFFF)
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)
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// TranslateMask iterates over mask and returns a slice of corresponding
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// capabilities. If a bit is out of range of known capabilities, it is set as
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// "unknown" to catch potential regressions when new capabilities are added to
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// the kernel.
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func TranslateMask(mask uint64) []string {
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caps := []string{}
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for i := uint(0); i < 64; i++ {
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if (mask>>i)&0x1 == 1 {
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c, known := capabilities[i]
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if !known {
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c = "unknown"
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}
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caps = append(caps, c)
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}
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}
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return caps
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}
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