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2020-01-21Merge release-20200115.0-49-g2ba6198 (automated)gVisor bot
2020-01-21Add syscalls for lgetxattr, fgetxattr, lsetxattr, and fsetxattr.Dean Deng
Note that these simply will use the same logic as getxattr and setxattr, which is not yet implemented for most filesystems. PiperOrigin-RevId: 290800960
2020-01-17Merge release-20200115.0-26-gacf2d6d (automated)gVisor bot
2020-01-17Enable stat syscall support on arm64.Haibo Xu
x86 and arm64 use a different stat struct in Linux kernel, so the stat() syscall implementation has to handle the file stat data separately. Signed-off-by: Haibo Xu <haibo.xu@arm.com> Change-Id: If3986e915a667362257a54e7fbbcc1fe18951015 COPYBARA_INTEGRATE_REVIEW=https://github.com/google/gvisor/pull/1493 from xiaobo55x:stat f15a216d9297eb9a96d2c483d396a9919145d7fa PiperOrigin-RevId: 290274287
2020-01-17Merge release-20200115.0-16-g7a45ae7 (automated)gVisor bot
2020-01-16Implement setxattr for overlays.Dean Deng
PiperOrigin-RevId: 290186303
2020-01-16Merge release-20200115.0-9-g07f2584 (automated)gVisor bot
2020-01-16Plumb getting/setting xattrs through InodeOperations and 9p gofer interfaces.Dean Deng
There was a very bare get/setxattr in the InodeOperations interface. Add context.Context to both, size to getxattr, and flags to setxattr. Note that extended attributes are passed around as strings in this implementation, so size is automatically encoded into the value. Size is added in getxattr so that implementations can return ERANGE if a value is larger than can fit in the user-allocated buffer. This prevents us from unnecessarily passing around an arbitrarily large xattr when the user buffer is actually too small. Don't use the existing xattrwalk and xattrcreate messages and define our own, mainly for the sake of simplicity. Extended attributes will be implemented in future commits. PiperOrigin-RevId: 290121300
2020-01-16Merge release-20200115.0-5-g420d335 (automated)gVisor bot
2020-01-16Enable clone syscall support on arm64.Haibo Xu
sys_clone has many flavors in Linux, and amd64 chose a different one from x86(different arguments order). Ref kernel/fork.c for more info. Signed-off-by: Haibo Xu <haibo.xu@arm.com> Change-Id: I6c8cbc685f4a6e786b171715ab68292fc95cbf48 COPYBARA_INTEGRATE_REVIEW=https://github.com/google/gvisor/pull/1545 from xiaobo55x:clone 156bd2dfbc63ef5291627b0578ddea77997393b2 PiperOrigin-RevId: 290093953
2020-01-13Merge release-20191213.0-111-gb30cfb1 (automated)gVisor bot
2020-01-13Merge pull request #1528 from kevinGC:iptables-writegVisor bot
PiperOrigin-RevId: 289479774
2020-01-10Merge release-20191213.0-96-g27500d5 (automated)gVisor bot
2020-01-09New sync package.Ian Gudger
* Rename syncutil to sync. * Add aliases to sync types. * Replace existing usage of standard library sync package. This will make it easier to swap out synchronization primitives. For example, this will allow us to use primitives from github.com/sasha-s/go-deadlock to check for lock ordering violations. Updates #1472 PiperOrigin-RevId: 289033387
2020-01-08Minor fixes to comments and loggingKevin Krakauer
2020-01-06Merge release-20191213.0-61-g354a15a (automated)gVisor bot
2020-01-06Implement rseq(2)Michael Pratt
PiperOrigin-RevId: 288342928
2020-01-06Merge release-20191213.0-60-g6410387 (automated)gVisor bot
2020-01-06Cleanup Shm reference handlingMichael Pratt
Currently, shm.Registry.FindByID will return Shm instances without taking an additional reference on them, making it possible for them to disappear. More explicitly handle references. All callers hold a reference for the duration that they hold the instance. Registry.shms may transitively hold Shms with no references, so it must TryIncRef to determine if they are still valid. PiperOrigin-RevId: 288314529
2019-12-20Merge release-20191213.0-36-g29955a4 (automated)gVisor bot
2019-12-19futex: wake one waiter if futex_wake is called with a non-positive valueAndrei Vagin
This change is needed to be compatible with the Linux kernel. There is no glibc wrapper for the futex system call, so it is easy to make a mistake and call syscall(__NR_futex, FUTEX_WAKE, addr) without the fourth argument. This works on Linux, because it wakes one waiter even if val is nonpositive. PiperOrigin-RevId: 286494396
2019-12-16Merge release-20191210.0-32-g3193b2f (automated)gVisor bot
2019-12-16Drop unnecessary cast.Dean Deng
Bitshift operators with signed int is supported in Go 1.13. PiperOrigin-RevId: 285853622
2019-12-16Merge release-20191210.0-31-ge6f4124 (automated)gVisor bot
2019-12-16Implement checks for get/setxattr at the syscall layer.Dean Deng
Add checks for input arguments, file type, permissions, etc. that match the Linux implementation. A call to get/setxattr that passes all the checks will still currently return EOPNOTSUPP. Actual support will be added in following commits. Only allow user.* extended attributes for the time being. PiperOrigin-RevId: 285835159
2019-12-11Merge release-20191129.0-43-g2e3b9b0 (automated)gVisor bot
2019-12-10Deduplicate and simplify control message processing for recvmsg and sendmsg.Dean Deng
Also, improve performance by calculating how much space is needed before making an allocation for sendmsg in hostinet. PiperOrigin-RevId: 284898581
2019-12-10Merge release-20191129.0-38-g39386d7 (automated)gVisor bot
2019-12-10Format fd_set parameters in select(2)/pselect(2) for strace.Dean Deng
I1202 14:55:06.835076 7991 x:0] [ 1] select_test E select(0xa, 0x7fc6ce924c28 [0 1], null, null, 0x7fc6ce924c08 {sec=0 usec=0}) I1202 14:55:06.835102 7991 x:0] [ 1] select_test X select(0xa, 0x7fc6ce924c28 [0 1], null, null, 0x7fc6ce924c08 {sec=0 usec=0}) PiperOrigin-RevId: 284831805
2019-12-10Merge release-20191129.0-36-gf6e87be (automated)gVisor bot
2019-12-10Let socket.ControlMessages Release() the underlying transport.ControlMessages.Dean Deng
PiperOrigin-RevId: 284804370
2019-12-10Merge release-20191129.0-34-gc15be3f (automated)gVisor bot
2019-12-10Add all upstream syscalls to tablesMichael Pratt
Package strace is missing some syscalls we actually implement (e.g., getrandom). We also see newer syscalls sometimes (e.g., membarrier) that would be handy to have formatted. Let's go ahead and add all syscalls in the latest upstream release (v5.4), even though we only intend to implement v4.4. None of them are implemented, just included as placeholders. PiperOrigin-RevId: 284797577
2019-12-09Merge release-20191129.0-27-g898dcc2 (automated)gVisor bot
2019-12-09Redirect TODOs to gvisor.devFabricio Voznika
PiperOrigin-RevId: 284606233
2019-12-06Merge release-20191129.0-7-g13f0f60 (automated)gVisor bot
2019-12-05Implement F_GETOWN_EX and F_SETOWN_EX.Ian Gudger
Some versions of glibc will convert F_GETOWN fcntl(2) calls into F_GETOWN_EX in some cases. PiperOrigin-RevId: 284089373
2019-12-02Merge release-20191114.0-45-g9194aab (automated)gVisor bot
2019-12-02Support sending IP_TOS and IPV6_TCLASS control messages with hostinet sockets.Dean Deng
There are two potential ways of sending a TOS byte with outgoing packets: including a control message in sendmsg, or setting the IP_TOS/IPV6_TCLASS socket options (for IPV4 and IPV6 respectively). This change lets hostinet support the former. PiperOrigin-RevId: 283346737
2019-11-28Merge release-20191114.0-41-g684f757 (automated)gVisor bot
2019-11-27Add support for receiving TOS and TCLASS control messages in hostinet.Dean Deng
This involves allowing getsockopt/setsockopt for the corresponding socket options, as well as allowing hostinet to process control messages received from the actual recvmsg syscall. PiperOrigin-RevId: 282851425
2019-11-27Merge release-20191114.0-39-g20279c3 (automated)gVisor bot
2019-11-26Allow open(O_TRUNC) and (f)truncate for proc files.Ian Lewis
This allows writable proc and devices files to be opened with O_CREAT|O_TRUNC. This is encountered most frequently when interacting with proc or devices files via the command line. e.g. $ echo 8192 1048576 4194304 > /proc/sys/net/ipv4/tcp_rmem Also adds a test to test the behavior of open(O_TRUNC), truncate, and ftruncate on named pipes. Fixes #1116 PiperOrigin-RevId: 282677425
2019-11-27Merge release-20191114.0-36-g519ceab (automated)gVisor bot
2019-11-26Mark execveat as supported for linux64_arm64.Dean Deng
PiperOrigin-RevId: 282667122
2019-11-20Merge release-20191114.0-16-g012102e (automated)gVisor bot
2019-11-20Pass OpenTruncate to gofer in Open call when opening file with O_TRUNC.Nicolas Lacasse
Note that the Sentry still calls Truncate() on the file before calling Open. A new p9 version check was added to ensure that the p9 server can handle the the OpenTruncate flag. If not, then the flag is stripped before sending. PiperOrigin-RevId: 281609112
2019-11-15Merge release-20191104.0-44-gaf323eb (automated)gVisor bot
2019-11-14Fix return codes for {get,set}sockopt for some nullptr cases.Ting-Yu Wang
Updates #1092 PiperOrigin-RevId: 280547239
2019-11-15Merge release-20191104.0-43-g339536d (automated)gVisor bot
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