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2019-07-02Remove map from fd_map, change to fd_table.Adin Scannell
This renames FDMap to FDTable and drops the kernel.FD type, which had an entire package to itself and didn't serve much use (it was freely cast between types, and served as more of an annoyance than providing any protection.) Based on BenchmarkFDLookupAndDecRef-12, we can expect 5-10 ns per lookup operation, and 10-15 ns per concurrent lookup operation of savings. This also fixes two tangential usage issues with the FDMap. Namely, non-atomic use of NewFDFrom and associated calls to Remove (that are both racy and fail to drop the reference on the underlying file.) PiperOrigin-RevId: 256285890
2019-06-13Plumb context through more layers of filesytem.Ian Gudger
All functions which allocate objects containing AtomicRefCounts will soon need a context. PiperOrigin-RevId: 253147709
2019-06-13Update canonical repository.Adin Scannell
This can be merged after: https://github.com/google/gvisor-website/pull/77 or https://github.com/google/gvisor-website/pull/78 PiperOrigin-RevId: 253132620
2019-05-21Fix inconsistencies in ELF anonymous mappingsMichael Pratt
* A segment with filesz == 0, memsz > 0 should be an anonymous only mapping. We were failing to load such an ELF. * Anonymous pages are always mapped RW, regardless of the segment protections. PiperOrigin-RevId: 249355239 Change-Id: I251e5c0ce8848cf8420c3aadf337b0d77b1ad991
2019-05-21Add basic plumbing for splice and stub implementation.Adin Scannell
This does not actually implement an efficient splice or sendfile. Rather, it adds a generic plumbing to the file internals so that this can be added. All file implementations use the stub fileutil.NoSplice implementation, which causes sendfile and splice to fall back to an internal copy. A basic splice system call interface is added, along with a test. PiperOrigin-RevId: 249335960 Change-Id: Ic5568be2af0a505c19e7aec66d5af2480ab0939b
2019-04-29Change copyright notice to "The gVisor Authors"Michael Pratt
Based on the guidelines at https://opensource.google.com/docs/releasing/authors/. 1. $ rg -l "Google LLC" | xargs sed -i 's/Google LLC.*/The gVisor Authors./' 2. Manual fixup of "Google Inc" references. 3. Add AUTHORS file. Authors may request to be added to this file. 4. Point netstack AUTHORS to gVisor AUTHORS. Drop CONTRIBUTORS. Fixes #209 PiperOrigin-RevId: 245823212 Change-Id: I64530b24ad021a7d683137459cafc510f5ee1de9
2019-04-29Allow and document bug ids in gVisor codebase.Nicolas Lacasse
PiperOrigin-RevId: 245818639 Change-Id: I03703ef0fb9b6675955637b9fe2776204c545789
2019-04-11Use open fids when fstat()ing gofer files.Jamie Liu
PiperOrigin-RevId: 243018347 Change-Id: I1e5b80607c1df0747482abea61db7fcf24536d37
2019-04-10Internal changeMichael Pratt
PiperOrigin-RevId: 242978508 Change-Id: I0ea59ac5ba1dd499e87c53f2e24709371048679b
2019-03-14Decouple filemem from platform and move it to pgalloc.MemoryFile.Jamie Liu
This is in preparation for improved page cache reclaim, which requires greater integration between the page cache and page allocator. PiperOrigin-RevId: 238444706 Change-Id: Id24141b3678d96c7d7dc24baddd9be555bffafe4
2019-01-31Remove license commentsMichael Pratt
Nothing reads them and they can simply get stale. Generated with: $ sed -i "s/licenses(\(.*\)).*/licenses(\1)/" **/BUILD PiperOrigin-RevId: 231818945 Change-Id: Ibc3f9838546b7e94f13f217060d31f4ada9d4bf0
2019-01-14Remove fs.Handle, ramfs.Entry, and all the DeprecatedFileOperations.Nicolas Lacasse
More helper structs have been added to the fsutil package to make it easier to implement fs.InodeOperations and fs.FileOperations. PiperOrigin-RevId: 229305982 Change-Id: Ib6f8d3862f4216745116857913dbfa351530223b
2019-01-08Improve loader related error messages returned to users.Brian Geffon
PiperOrigin-RevId: 228382827 Change-Id: Ica1d30e0df826bdd77f180a5092b2b735ea5c804
2018-12-11Remove unused envv variable from two funcs.Christopher Koch
PiperOrigin-RevId: 225041520 Change-Id: Ib1afc693e592d308d60db82022c5b7743fd3c646
2018-12-04Max link traversals should be for an entire path.Brian Geffon
The number of symbolic links that are allowed to be followed are for a full path and not just a chain of symbolic links. PiperOrigin-RevId: 224047321 Change-Id: I5e3c4caf66a93c17eeddcc7f046d1e8bb9434a40
2018-10-23Track paths and provide a rename hook.Adin Scannell
This change also adds extensive testing to the p9 package via mocks. The sanity checks and type checks are moved from the gofer into the core package, where they can be more easily validated. PiperOrigin-RevId: 218296768 Change-Id: I4fc3c326e7bf1e0e140a454cbacbcc6fd617ab55
2018-10-19Use correct company name in copyright headerIan Gudger
PiperOrigin-RevId: 217951017 Change-Id: Ie08bf6987f98467d07457bcf35b5f1ff6e43c035
2018-10-08Statfs Namelen should be NAME_MAX not PATH_MAXMichael Pratt
We accidentally set the wrong maximum. I've also added PATH_MAX and NAME_MAX to the linux abi package. PiperOrigin-RevId: 216221311 Change-Id: I44805fcf21508831809692184a0eba4cee469633
2018-08-22Always add AT_BASE even if there is no interpreter.Brian Geffon
Linux will ALWAYS add AT_BASE even for a static binary, expect it will be set to 0 [1]. 1. https://github.com/torvalds/linux/blob/master/fs/binfmt_elf.c#L253 PiperOrigin-RevId: 209811129 Change-Id: I92cc66532f23d40f24414a921c030bd3481e12a0
2018-08-02Automated rollback of changelist 207037226Zhaozhong Ni
PiperOrigin-RevId: 207125440 Change-Id: I6c572afb4d693ee72a0c458a988b0e96d191cd49
2018-08-01Automated rollback of changelist 207007153Michael Pratt
PiperOrigin-RevId: 207037226 Change-Id: I8b5f1a056d4f3eab17846f2e0193bb737ecb5428
2018-08-01stateify: convert all packages to use explicit mode.Zhaozhong Ni
PiperOrigin-RevId: 207007153 Change-Id: Ifedf1cc3758dc18be16647a4ece9c840c1c636c9
2018-07-27stateify: support explicit annotation mode; convert refs and stack packages.Zhaozhong Ni
We have been unnecessarily creating too many savable types implicitly. PiperOrigin-RevId: 206334201 Change-Id: Idc5a3a14bfb7ee125c4f2bb2b1c53164e46f29a8
2018-07-19Add AT_UID, AT_EUID, AT_GID, AT_EGID to aux vector.Brian Geffon
With musl libc when these entries are missing from the aux vector it's forcing libc.secure (effectively AT_SECURE). This mode prevents RPATH and LD_LIBRARY_PATH from working. https://git.musl-libc.org/cgit/musl/tree/ldso/dynlink.c#n1488 As the first entry is a mask of all the aux fields set: https://git.musl-libc.org/cgit/musl/tree/ldso/dynlink.c#n187 PiperOrigin-RevId: 205284684 Change-Id: I04de7bab241043306b4f732306a81d74edfdff26
2018-07-09Trim all whitespace between interpreter and argMichael Pratt
Multiple whitespace characters are allowed. This fixes Ubuntu's /usr/sbin/invoke-rc.d, which has trailing whitespace after the interpreter which we were treating as an arg. PiperOrigin-RevId: 203802278 Change-Id: I0a6cdb0af4b139cf8abb22fa70351fe3697a5c6b
2018-07-03Fix runsc VDSO mappingMichael Pratt
80bdf8a4068de3ac4a73b6b61a0cdcfe3e3571af accidentally moved vdso into an inner scope, never assigning the vdso variable passed to the Kernel and thus skipping VDSO mappings. Fix this and remove the ability for loadVDSO to skip VDSO mappings, since tests that do so are gone. PiperOrigin-RevId: 203169135 Change-Id: Ifd8cadcbaf82f959223c501edcc4d83d05327eba
2018-07-03Handle NUL-only paths in execMichael Pratt
The path in execve(2), interpreter script, and ELF interpreter may all be no more than a NUL-byte. Handle each of those cases. PiperOrigin-RevId: 203155745 Change-Id: I1c8b1b387924b23b2cf942341dfc76c9003da959
2018-06-15Replace crypto/rand with internal rand packageMichael Pratt
PiperOrigin-RevId: 200784607 Change-Id: I39aa6ee632936dcbb00fc298adccffa606e9f4c0
2018-06-13Fix reference leak in VDSO validationIan Gudger
PiperOrigin-RevId: 200496070 Change-Id: I33adb717c44e5b4bcadece882be3ab1ee3920556
2018-06-12Drop MMapOpts.MappingIdentity reference in loader.mapSegment.Jamie Liu
PiperOrigin-RevId: 200261995 Change-Id: I7e460b18ceab2c23096bdeb7416159d6e774aaf7
2018-05-08Reword misleading log lineIan Gudger
PiperOrigin-RevId: 195834310 Change-Id: I8af748f75ab87ad1cd29c4c8904d07fd729ba6c9
2018-05-07Fix misspellingsIan Gudger
PiperOrigin-RevId: 195742598 Change-Id: Ibd4a8e4394e268c87700b6d1e50b4b37dfce5182
2018-05-04Remove ineffectual code in sentry ELF loaderIan Gudger
PiperOrigin-RevId: 195517702 Change-Id: Id90309a6365cac06e68e8774aa79dc76ce1b11c7
2018-04-28Check in gVisor.Googler
PiperOrigin-RevId: 194583126 Change-Id: Ica1d8821a90f74e7e745962d71801c598c652463
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