diff options
author | gVisor bot <gvisor-bot@google.com> | 2021-01-26 19:45:35 +0000 |
---|---|---|
committer | gVisor bot <gvisor-bot@google.com> | 2021-01-26 19:45:35 +0000 |
commit | a76428e5bbc73156044aabddaa2b495f57c64609 (patch) | |
tree | 8dba34eca97871a5891ff8220a1a399917ac9dfc /pkg/sentry/syscalls/linux | |
parent | 270d619546d5b1db19ea9f0eff5a64d3f0accae7 (diff) | |
parent | 203890b13447a41c484bfeb737958d1ae01383c9 (diff) |
Merge release-20210112.0-93-g203890b13 (automated)
Diffstat (limited to 'pkg/sentry/syscalls/linux')
-rw-r--r-- | pkg/sentry/syscalls/linux/vfs2/read_write.go | 39 | ||||
-rw-r--r-- | pkg/sentry/syscalls/linux/vfs2/setstat.go | 13 | ||||
-rw-r--r-- | pkg/sentry/syscalls/linux/vfs2/splice.go | 12 |
3 files changed, 1 insertions, 63 deletions
diff --git a/pkg/sentry/syscalls/linux/vfs2/read_write.go b/pkg/sentry/syscalls/linux/vfs2/read_write.go index b77b29dcc..c7417840f 100644 --- a/pkg/sentry/syscalls/linux/vfs2/read_write.go +++ b/pkg/sentry/syscalls/linux/vfs2/read_write.go @@ -93,17 +93,11 @@ func Readv(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall func read(t *kernel.Task, file *vfs.FileDescription, dst usermem.IOSequence, opts vfs.ReadOptions) (int64, error) { n, err := file.Read(t, dst, opts) if err != syserror.ErrWouldBlock { - if n > 0 { - file.Dentry().InotifyWithParent(t, linux.IN_ACCESS, 0, vfs.PathEvent) - } return n, err } allowBlock, deadline, hasDeadline := blockPolicy(t, file) if !allowBlock { - if n > 0 { - file.Dentry().InotifyWithParent(t, linux.IN_ACCESS, 0, vfs.PathEvent) - } return n, err } @@ -134,9 +128,6 @@ func read(t *kernel.Task, file *vfs.FileDescription, dst usermem.IOSequence, opt } file.EventUnregister(&w) - if total > 0 { - file.Dentry().InotifyWithParent(t, linux.IN_ACCESS, 0, vfs.PathEvent) - } return total, err } @@ -257,17 +248,11 @@ func Preadv2(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysca func pread(t *kernel.Task, file *vfs.FileDescription, dst usermem.IOSequence, offset int64, opts vfs.ReadOptions) (int64, error) { n, err := file.PRead(t, dst, offset, opts) if err != syserror.ErrWouldBlock { - if n > 0 { - file.Dentry().InotifyWithParent(t, linux.IN_ACCESS, 0, vfs.PathEvent) - } return n, err } allowBlock, deadline, hasDeadline := blockPolicy(t, file) if !allowBlock { - if n > 0 { - file.Dentry().InotifyWithParent(t, linux.IN_ACCESS, 0, vfs.PathEvent) - } return n, err } @@ -297,10 +282,6 @@ func pread(t *kernel.Task, file *vfs.FileDescription, dst usermem.IOSequence, of } } file.EventUnregister(&w) - - if total > 0 { - file.Dentry().InotifyWithParent(t, linux.IN_ACCESS, 0, vfs.PathEvent) - } return total, err } @@ -363,17 +344,11 @@ func Writev(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscal func write(t *kernel.Task, file *vfs.FileDescription, src usermem.IOSequence, opts vfs.WriteOptions) (int64, error) { n, err := file.Write(t, src, opts) if err != syserror.ErrWouldBlock { - if n > 0 { - file.Dentry().InotifyWithParent(t, linux.IN_MODIFY, 0, vfs.PathEvent) - } return n, err } allowBlock, deadline, hasDeadline := blockPolicy(t, file) if !allowBlock { - if n > 0 { - file.Dentry().InotifyWithParent(t, linux.IN_MODIFY, 0, vfs.PathEvent) - } return n, err } @@ -403,10 +378,6 @@ func write(t *kernel.Task, file *vfs.FileDescription, src usermem.IOSequence, op } } file.EventUnregister(&w) - - if total > 0 { - file.Dentry().InotifyWithParent(t, linux.IN_MODIFY, 0, vfs.PathEvent) - } return total, err } @@ -527,17 +498,11 @@ func Pwritev2(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysc func pwrite(t *kernel.Task, file *vfs.FileDescription, src usermem.IOSequence, offset int64, opts vfs.WriteOptions) (int64, error) { n, err := file.PWrite(t, src, offset, opts) if err != syserror.ErrWouldBlock { - if n > 0 { - file.Dentry().InotifyWithParent(t, linux.IN_MODIFY, 0, vfs.PathEvent) - } return n, err } allowBlock, deadline, hasDeadline := blockPolicy(t, file) if !allowBlock { - if n > 0 { - file.Dentry().InotifyWithParent(t, linux.IN_ACCESS, 0, vfs.PathEvent) - } return n, err } @@ -567,10 +532,6 @@ func pwrite(t *kernel.Task, file *vfs.FileDescription, src usermem.IOSequence, o } } file.EventUnregister(&w) - - if total > 0 { - file.Dentry().InotifyWithParent(t, linux.IN_ACCESS, 0, vfs.PathEvent) - } return total, err } diff --git a/pkg/sentry/syscalls/linux/vfs2/setstat.go b/pkg/sentry/syscalls/linux/vfs2/setstat.go index 1ee37e5a8..903169dc2 100644 --- a/pkg/sentry/syscalls/linux/vfs2/setstat.go +++ b/pkg/sentry/syscalls/linux/vfs2/setstat.go @@ -220,7 +220,6 @@ func Fallocate(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sys length := args[3].Int64() file := t.GetFileVFS2(fd) - if file == nil { return 0, nil, syserror.EBADF } @@ -229,23 +228,18 @@ func Fallocate(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sys if !file.IsWritable() { return 0, nil, syserror.EBADF } - if mode != 0 { return 0, nil, syserror.ENOTSUP } - if offset < 0 || length <= 0 { return 0, nil, syserror.EINVAL } size := offset + length - if size < 0 { return 0, nil, syserror.EFBIG } - limit := limits.FromContext(t).Get(limits.FileSize).Cur - if uint64(size) >= limit { t.SendSignal(&arch.SignalInfo{ Signo: int32(linux.SIGXFSZ), @@ -254,12 +248,7 @@ func Fallocate(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sys return 0, nil, syserror.EFBIG } - if err := file.Allocate(t, mode, uint64(offset), uint64(length)); err != nil { - return 0, nil, err - } - - file.Dentry().InotifyWithParent(t, linux.IN_MODIFY, 0, vfs.PathEvent) - return 0, nil, nil + return 0, nil, file.Allocate(t, mode, uint64(offset), uint64(length)) } // Utime implements Linux syscall utime(2). diff --git a/pkg/sentry/syscalls/linux/vfs2/splice.go b/pkg/sentry/syscalls/linux/vfs2/splice.go index 8bb763a47..19e175203 100644 --- a/pkg/sentry/syscalls/linux/vfs2/splice.go +++ b/pkg/sentry/syscalls/linux/vfs2/splice.go @@ -170,13 +170,6 @@ func Splice(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscal } } - if n != 0 { - // On Linux, inotify behavior is not very consistent with splice(2). We try - // our best to emulate Linux for very basic calls to splice, where for some - // reason, events are generated for output files, but not input files. - outFile.Dentry().InotifyWithParent(t, linux.IN_MODIFY, 0, vfs.PathEvent) - } - // We can only pass a single file to handleIOError, so pick inFile arbitrarily. // This is used only for debugging purposes. return uintptr(n), nil, slinux.HandleIOErrorVFS2(t, n != 0, err, syserror.ERESTARTSYS, "splice", outFile) @@ -256,8 +249,6 @@ func Tee(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallCo } if n != 0 { - outFile.Dentry().InotifyWithParent(t, linux.IN_MODIFY, 0, vfs.PathEvent) - // If a partial write is completed, the error is dropped. Log it here. if err != nil && err != io.EOF && err != syserror.ErrWouldBlock { log.Debugf("tee completed a partial write with error: %v", err) @@ -449,9 +440,6 @@ func Sendfile(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysc } if total != 0 { - inFile.Dentry().InotifyWithParent(t, linux.IN_ACCESS, 0, vfs.PathEvent) - outFile.Dentry().InotifyWithParent(t, linux.IN_MODIFY, 0, vfs.PathEvent) - if err != nil && err != io.EOF && err != syserror.ErrWouldBlock { // If a partial write is completed, the error is dropped. Log it here. log.Debugf("sendfile completed a partial write with error: %v", err) |