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-rw-r--r--pkg/sentry/fsimpl/gofer/BUILD2
-rw-r--r--pkg/sentry/fsimpl/gofer/filesystem.go9
-rw-r--r--pkg/sentry/fsimpl/gofer/gofer.go23
-rw-r--r--pkg/sentry/fsimpl/gofer/special_file.go4
4 files changed, 34 insertions, 4 deletions
diff --git a/pkg/sentry/fsimpl/gofer/BUILD b/pkg/sentry/fsimpl/gofer/BUILD
index f5f35a3bc..5cdeeaeb5 100644
--- a/pkg/sentry/fsimpl/gofer/BUILD
+++ b/pkg/sentry/fsimpl/gofer/BUILD
@@ -54,6 +54,7 @@ go_library(
"//pkg/p9",
"//pkg/safemem",
"//pkg/sentry/fs/fsutil",
+ "//pkg/sentry/fs/lock",
"//pkg/sentry/fsimpl/host",
"//pkg/sentry/hostfd",
"//pkg/sentry/kernel",
@@ -68,6 +69,7 @@ go_library(
"//pkg/sentry/socket/unix/transport",
"//pkg/sentry/usage",
"//pkg/sentry/vfs",
+ "//pkg/sentry/vfs/lock",
"//pkg/syserr",
"//pkg/syserror",
"//pkg/unet",
diff --git a/pkg/sentry/fsimpl/gofer/filesystem.go b/pkg/sentry/fsimpl/gofer/filesystem.go
index 36e0e1856..40933b74b 100644
--- a/pkg/sentry/fsimpl/gofer/filesystem.go
+++ b/pkg/sentry/fsimpl/gofer/filesystem.go
@@ -801,6 +801,7 @@ func (d *dentry) openLocked(ctx context.Context, rp *vfs.ResolvingPath, opts *vf
return nil, err
}
fd := &regularFileFD{}
+ fd.LockFD.Init(&d.locks)
if err := fd.vfsfd.Init(fd, opts.Flags, mnt, &d.vfsd, &vfs.FileDescriptionOptions{
AllowDirectIO: true,
}); err != nil {
@@ -826,6 +827,7 @@ func (d *dentry) openLocked(ctx context.Context, rp *vfs.ResolvingPath, opts *vf
}
}
fd := &directoryFD{}
+ fd.LockFD.Init(&d.locks)
if err := fd.vfsfd.Init(fd, opts.Flags, mnt, &d.vfsd, &vfs.FileDescriptionOptions{}); err != nil {
return nil, err
}
@@ -842,7 +844,7 @@ func (d *dentry) openLocked(ctx context.Context, rp *vfs.ResolvingPath, opts *vf
}
case linux.S_IFIFO:
if d.isSynthetic() {
- return d.pipe.Open(ctx, mnt, &d.vfsd, opts.Flags)
+ return d.pipe.Open(ctx, mnt, &d.vfsd, opts.Flags, &d.locks)
}
}
return d.openSpecialFileLocked(ctx, mnt, opts)
@@ -902,7 +904,7 @@ retry:
return nil, err
}
}
- fd, err := newSpecialFileFD(h, mnt, d, opts.Flags)
+ fd, err := newSpecialFileFD(h, mnt, d, &d.locks, opts.Flags)
if err != nil {
h.close(ctx)
return nil, err
@@ -989,6 +991,7 @@ func (d *dentry) createAndOpenChildLocked(ctx context.Context, rp *vfs.Resolving
var childVFSFD *vfs.FileDescription
if useRegularFileFD {
fd := &regularFileFD{}
+ fd.LockFD.Init(&child.locks)
if err := fd.vfsfd.Init(fd, opts.Flags, mnt, &child.vfsd, &vfs.FileDescriptionOptions{
AllowDirectIO: true,
}); err != nil {
@@ -1003,7 +1006,7 @@ func (d *dentry) createAndOpenChildLocked(ctx context.Context, rp *vfs.Resolving
if fdobj != nil {
h.fd = int32(fdobj.Release())
}
- fd, err := newSpecialFileFD(h, mnt, child, opts.Flags)
+ fd, err := newSpecialFileFD(h, mnt, child, &d.locks, opts.Flags)
if err != nil {
h.close(ctx)
return nil, err
diff --git a/pkg/sentry/fsimpl/gofer/gofer.go b/pkg/sentry/fsimpl/gofer/gofer.go
index 3f3bd56f0..0d88a328e 100644
--- a/pkg/sentry/fsimpl/gofer/gofer.go
+++ b/pkg/sentry/fsimpl/gofer/gofer.go
@@ -45,6 +45,7 @@ import (
"gvisor.dev/gvisor/pkg/log"
"gvisor.dev/gvisor/pkg/p9"
"gvisor.dev/gvisor/pkg/sentry/fs/fsutil"
+ fslock "gvisor.dev/gvisor/pkg/sentry/fs/lock"
"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
"gvisor.dev/gvisor/pkg/sentry/kernel/pipe"
ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time"
@@ -52,6 +53,7 @@ import (
"gvisor.dev/gvisor/pkg/sentry/pgalloc"
"gvisor.dev/gvisor/pkg/sentry/socket/unix/transport"
"gvisor.dev/gvisor/pkg/sentry/vfs"
+ "gvisor.dev/gvisor/pkg/sentry/vfs/lock"
"gvisor.dev/gvisor/pkg/syserror"
"gvisor.dev/gvisor/pkg/unet"
"gvisor.dev/gvisor/pkg/usermem"
@@ -662,6 +664,8 @@ type dentry struct {
// If this dentry represents a synthetic named pipe, pipe is the pipe
// endpoint bound to this file.
pipe *pipe.VFSPipe
+
+ locks lock.FileLocks
}
// dentryAttrMask returns a p9.AttrMask enabling all attributes used by the
@@ -1366,6 +1370,9 @@ func (d *dentry) decLinks() {
type fileDescription struct {
vfsfd vfs.FileDescription
vfs.FileDescriptionDefaultImpl
+ vfs.LockFD
+
+ lockLogging sync.Once
}
func (fd *fileDescription) filesystem() *filesystem {
@@ -1416,3 +1423,19 @@ func (fd *fileDescription) Setxattr(ctx context.Context, opts vfs.SetxattrOption
func (fd *fileDescription) Removexattr(ctx context.Context, name string) error {
return fd.dentry().removexattr(ctx, auth.CredentialsFromContext(ctx), name)
}
+
+// LockBSD implements vfs.FileDescriptionImpl.LockBSD.
+func (fd *fileDescription) LockBSD(ctx context.Context, uid fslock.UniqueID, t fslock.LockType, block fslock.Blocker) error {
+ fd.lockLogging.Do(func() {
+ log.Infof("File lock using gofer file handled internally.")
+ })
+ return fd.LockFD.LockBSD(ctx, uid, t, block)
+}
+
+// LockPOSIX implements vfs.FileDescriptionImpl.LockPOSIX.
+func (fd *fileDescription) LockPOSIX(ctx context.Context, uid fslock.UniqueID, t fslock.LockType, rng fslock.LockRange, block fslock.Blocker) error {
+ fd.lockLogging.Do(func() {
+ log.Infof("Range lock using gofer file handled internally.")
+ })
+ return fd.LockFD.LockPOSIX(ctx, uid, t, rng, block)
+}
diff --git a/pkg/sentry/fsimpl/gofer/special_file.go b/pkg/sentry/fsimpl/gofer/special_file.go
index ff6126b87..289efdd25 100644
--- a/pkg/sentry/fsimpl/gofer/special_file.go
+++ b/pkg/sentry/fsimpl/gofer/special_file.go
@@ -22,6 +22,7 @@ import (
"gvisor.dev/gvisor/pkg/fdnotifier"
"gvisor.dev/gvisor/pkg/safemem"
"gvisor.dev/gvisor/pkg/sentry/vfs"
+ "gvisor.dev/gvisor/pkg/sentry/vfs/lock"
"gvisor.dev/gvisor/pkg/syserror"
"gvisor.dev/gvisor/pkg/usermem"
"gvisor.dev/gvisor/pkg/waiter"
@@ -51,7 +52,7 @@ type specialFileFD struct {
off int64
}
-func newSpecialFileFD(h handle, mnt *vfs.Mount, d *dentry, flags uint32) (*specialFileFD, error) {
+func newSpecialFileFD(h handle, mnt *vfs.Mount, d *dentry, locks *lock.FileLocks, flags uint32) (*specialFileFD, error) {
ftype := d.fileType()
seekable := ftype == linux.S_IFREG
mayBlock := ftype == linux.S_IFIFO || ftype == linux.S_IFSOCK
@@ -60,6 +61,7 @@ func newSpecialFileFD(h handle, mnt *vfs.Mount, d *dentry, flags uint32) (*speci
seekable: seekable,
mayBlock: mayBlock,
}
+ fd.LockFD.Init(locks)
if mayBlock && h.fd >= 0 {
if err := fdnotifier.AddFD(h.fd, &fd.queue); err != nil {
return nil, err
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 21:00:09 +0000