From bef5d567b0d65b664c256577a8b6ec46897542c9 Mon Sep 17 00:00:00 2001 From: Sebastiaan van Stijn Date: Thu, 18 Jan 2024 10:03:35 +0100 Subject: [PATCH] vendor: github.com/moby/sys/mountinfo v0.7.1 full diff: https://github.com/moby/sys/compare/mountinfo/v0.6.2...mountinfo/v0.7.1 Signed-off-by: Sebastiaan van Stijn --- go.mod | 2 +- go.sum | 4 +- .../moby/sys/mountinfo/mountinfo_linux.go | 50 ++++++++++++++++--- vendor/modules.txt | 2 +- 4 files changed, 47 insertions(+), 11 deletions(-) diff --git a/go.mod b/go.mod index 7d9b477c..397fb210 100644 --- a/go.mod +++ b/go.mod @@ -25,7 +25,7 @@ require ( github.com/hashicorp/go-cty-funcs v0.0.0-20230405223818-a090f58aa992 github.com/hashicorp/hcl/v2 v2.19.1 github.com/moby/buildkit v0.13.0-beta1.0.20240105171016-6e200afad512 // master (v0.13.0-dev) - github.com/moby/sys/mountinfo v0.6.2 + github.com/moby/sys/mountinfo v0.7.1 github.com/moby/sys/signal v0.7.0 github.com/morikuni/aec v1.0.0 github.com/opencontainers/go-digest v1.0.0 diff --git a/go.sum b/go.sum index 4b2f33de..0f8276d4 100644 --- a/go.sum +++ b/go.sum @@ -325,8 +325,8 @@ github.com/moby/patternmatcher v0.6.0 h1:GmP9lR19aU5GqSSFko+5pRqHi+Ohk1O69aFiKkV github.com/moby/patternmatcher v0.6.0/go.mod h1:hDPoyOpDY7OrrMDLaYoY3hf52gNCR/YOUYxkhApJIxc= github.com/moby/spdystream v0.2.0 h1:cjW1zVyyoiM0T7b6UoySUFqzXMoqRckQtXwGPiBhOM8= github.com/moby/spdystream v0.2.0/go.mod h1:f7i0iNDQJ059oMTcWxx8MA/zKFIuD/lY+0GqbN2Wy8c= -github.com/moby/sys/mountinfo v0.6.2 h1:BzJjoreD5BMFNmD9Rus6gdd1pLuecOFPt8wC+Vygl78= -github.com/moby/sys/mountinfo v0.6.2/go.mod h1:IJb6JQeOklcdMU9F5xQ8ZALD+CUr5VlGpwtX+VE0rpI= +github.com/moby/sys/mountinfo v0.7.1 h1:/tTvQaSJRr2FshkhXiIpux6fQ2Zvc4j7tAhMTStAG2g= +github.com/moby/sys/mountinfo v0.7.1/go.mod h1:IJb6JQeOklcdMU9F5xQ8ZALD+CUr5VlGpwtX+VE0rpI= github.com/moby/sys/sequential v0.5.0 h1:OPvI35Lzn9K04PBbCLW0g4LcFAJgHsvXsRyewg5lXtc= github.com/moby/sys/sequential v0.5.0/go.mod h1:tH2cOOs5V9MlPiXcQzRC+eEyab644PWKGRYaaV5ZZlo= github.com/moby/sys/signal v0.7.0 h1:25RW3d5TnQEoKvRbEKUGay6DCQ46IxAVTT9CUMgmsSI= diff --git a/vendor/github.com/moby/sys/mountinfo/mountinfo_linux.go b/vendor/github.com/moby/sys/mountinfo/mountinfo_linux.go index 59332b07..b32b5c9b 100644 --- a/vendor/github.com/moby/sys/mountinfo/mountinfo_linux.go +++ b/vendor/github.com/moby/sys/mountinfo/mountinfo_linux.go @@ -5,15 +5,19 @@ import ( "fmt" "io" "os" + "runtime" "strconv" "strings" + "sync" + + "golang.org/x/sys/unix" ) // GetMountsFromReader retrieves a list of mounts from the // reader provided, with an optional filter applied (use nil // for no filter). This can be useful in tests or benchmarks // that provide fake mountinfo data, or when a source other -// than /proc/self/mountinfo needs to be read from. +// than /proc/thread-self/mountinfo needs to be read from. // // This function is Linux-specific. func GetMountsFromReader(r io.Reader, filter FilterFunc) ([]*Info, error) { @@ -127,8 +131,40 @@ func GetMountsFromReader(r io.Reader, filter FilterFunc) ([]*Info, error) { return out, nil } -func parseMountTable(filter FilterFunc) ([]*Info, error) { - f, err := os.Open("/proc/self/mountinfo") +var ( + haveProcThreadSelf bool + haveProcThreadSelfOnce sync.Once +) + +func parseMountTable(filter FilterFunc) (_ []*Info, err error) { + haveProcThreadSelfOnce.Do(func() { + _, err := os.Stat("/proc/thread-self/mountinfo") + haveProcThreadSelf = err == nil + }) + + // We need to lock ourselves to the current OS thread in order to make sure + // that the thread referenced by /proc/thread-self stays alive until we + // finish parsing the file. + runtime.LockOSThread() + defer runtime.UnlockOSThread() + + var f *os.File + if haveProcThreadSelf { + f, err = os.Open("/proc/thread-self/mountinfo") + } else { + // On pre-3.17 kernels (such as CentOS 7), we don't have + // /proc/thread-self/ so we need to manually construct + // /proc/self/task// as a fallback. + f, err = os.Open("/proc/self/task/" + strconv.Itoa(unix.Gettid()) + "/mountinfo") + if os.IsNotExist(err) { + // If /proc/self/task/... failed, it means that our active pid + // namespace doesn't match the pid namespace of the /proc mount. In + // this case we just have to make do with /proc/self, since there + // is no other way of figuring out our tid in a parent pid + // namespace on pre-3.17 kernels. + f, err = os.Open("/proc/self/mountinfo") + } + } if err != nil { return nil, err } @@ -158,10 +194,10 @@ func PidMountInfo(pid int) ([]*Info, error) { // A few specific characters in mountinfo path entries (root and mountpoint) // are escaped using a backslash followed by a character's ascii code in octal. // -// space -- as \040 -// tab (aka \t) -- as \011 -// newline (aka \n) -- as \012 -// backslash (aka \\) -- as \134 +// space -- as \040 +// tab (aka \t) -- as \011 +// newline (aka \n) -- as \012 +// backslash (aka \\) -- as \134 // // This function converts path from mountinfo back, i.e. it unescapes the above sequences. func unescape(path string) (string, error) { diff --git a/vendor/modules.txt b/vendor/modules.txt index 6075186b..f8117552 100644 --- a/vendor/modules.txt +++ b/vendor/modules.txt @@ -572,7 +572,7 @@ github.com/moby/patternmatcher/ignorefile ## explicit; go 1.13 github.com/moby/spdystream github.com/moby/spdystream/spdy -# github.com/moby/sys/mountinfo v0.6.2 +# github.com/moby/sys/mountinfo v0.7.1 ## explicit; go 1.16 github.com/moby/sys/mountinfo # github.com/moby/sys/sequential v0.5.0