diff options
| author | Dean Deng <deandeng@google.com> | 2020-03-13 11:40:13 -0700 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2020-03-13 11:41:08 -0700 |
| commit | 2e38408f20a084de716962d4631e0fec1fd16c16 (patch) | |
| tree | b2e15836e5c5f483f003e79b8c30328ad43c844f /pkg/sentry/fsimpl/ext | |
| parent | f458a325e9b6aecf2ee198de19063505c48a14d7 (diff) | |
Implement access/faccessat for VFS2.
Note that the raw faccessat system call does not actually take a flags argument;
according to faccessat(2), the glibc wrapper implements the flags by using
fstatat(2). Remove the flag argument that we try to extract from vfs1, which
would just be a garbage value.
Updates #1965
Fixes #2101
PiperOrigin-RevId: 300796067
Diffstat (limited to 'pkg/sentry/fsimpl/ext')
| -rw-r--r-- | pkg/sentry/fsimpl/ext/filesystem.go | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/pkg/sentry/fsimpl/ext/filesystem.go b/pkg/sentry/fsimpl/ext/filesystem.go index e05429d41..8497be615 100644 --- a/pkg/sentry/fsimpl/ext/filesystem.go +++ b/pkg/sentry/fsimpl/ext/filesystem.go @@ -22,6 +22,7 @@ import ( "gvisor.dev/gvisor/pkg/context" "gvisor.dev/gvisor/pkg/fspath" "gvisor.dev/gvisor/pkg/sentry/fsimpl/ext/disklayout" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" "gvisor.dev/gvisor/pkg/sentry/vfs" "gvisor.dev/gvisor/pkg/sync" "gvisor.dev/gvisor/pkg/syserror" @@ -255,6 +256,15 @@ func (fs *filesystem) statTo(stat *linux.Statfs) { // TODO(b/134676337): Set Statfs.Flags and Statfs.FSID. } +// AccessAt implements vfs.Filesystem.Impl.AccessAt. +func (fs *filesystem) AccessAt(ctx context.Context, rp *vfs.ResolvingPath, creds *auth.Credentials, ats vfs.AccessTypes) error { + _, inode, err := fs.walk(rp, false) + if err != nil { + return err + } + return inode.checkPermissions(rp.Credentials(), ats) +} + // GetDentryAt implements vfs.FilesystemImpl.GetDentryAt. func (fs *filesystem) GetDentryAt(ctx context.Context, rp *vfs.ResolvingPath, opts vfs.GetDentryOptions) (*vfs.Dentry, error) { vfsd, inode, err := fs.walk(rp, false) |