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path: root/pkg/sentry/kernel/fd_table.go
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Diffstat (limited to 'pkg/sentry/kernel/fd_table.go')
-rw-r--r--pkg/sentry/kernel/fd_table.go43
1 files changed, 21 insertions, 22 deletions
diff --git a/pkg/sentry/kernel/fd_table.go b/pkg/sentry/kernel/fd_table.go
index 5773244ac..89223fa36 100644
--- a/pkg/sentry/kernel/fd_table.go
+++ b/pkg/sentry/kernel/fd_table.go
@@ -112,7 +112,7 @@ func (f *FDTable) loadDescriptorTable(m map[int32]descriptor) {
ctx := context.Background()
f.init() // Initialize table.
for fd, d := range m {
- f.setAll(fd, d.file, d.fileVFS2, d.flags)
+ f.setAll(ctx, fd, d.file, d.fileVFS2, d.flags)
// Note that we do _not_ need to acquire a extra table reference here. The
// table reference will already be accounted for in the file, so we drop the
@@ -127,7 +127,7 @@ func (f *FDTable) loadDescriptorTable(m map[int32]descriptor) {
}
// drop drops the table reference.
-func (f *FDTable) drop(file *fs.File) {
+func (f *FDTable) drop(ctx context.Context, file *fs.File) {
// Release locks.
file.Dirent.Inode.LockCtx.Posix.UnlockRegion(f, lock.LockRange{0, lock.LockEOF})
@@ -145,14 +145,13 @@ func (f *FDTable) drop(file *fs.File) {
d.InotifyEvent(ev, 0)
// Drop the table reference.
- file.DecRef(context.Background())
+ file.DecRef(ctx)
}
// dropVFS2 drops the table reference.
-func (f *FDTable) dropVFS2(file *vfs.FileDescription) {
+func (f *FDTable) dropVFS2(ctx context.Context, file *vfs.FileDescription) {
// Release any POSIX lock possibly held by the FDTable. Range {0, 0} means the
// entire file.
- ctx := context.Background()
err := file.UnlockPOSIX(ctx, f, 0, 0, linux.SEEK_SET)
if err != nil && err != syserror.ENOLCK {
panic(fmt.Sprintf("UnlockPOSIX failed: %v", err))
@@ -289,15 +288,15 @@ func (f *FDTable) NewFDs(ctx context.Context, fd int32, files []*fs.File, flags
// Install all entries.
for i := fd; i < end && len(fds) < len(files); i++ {
if d, _, _ := f.get(i); d == nil {
- f.set(i, files[len(fds)], flags) // Set the descriptor.
- fds = append(fds, i) // Record the file descriptor.
+ f.set(ctx, i, files[len(fds)], flags) // Set the descriptor.
+ fds = append(fds, i) // Record the file descriptor.
}
}
// Failure? Unwind existing FDs.
if len(fds) < len(files) {
for _, i := range fds {
- f.set(i, nil, FDFlags{}) // Zap entry.
+ f.set(ctx, i, nil, FDFlags{}) // Zap entry.
}
return nil, syscall.EMFILE
}
@@ -344,15 +343,15 @@ func (f *FDTable) NewFDsVFS2(ctx context.Context, fd int32, files []*vfs.FileDes
// Install all entries.
for i := fd; i < end && len(fds) < len(files); i++ {
if d, _, _ := f.getVFS2(i); d == nil {
- f.setVFS2(i, files[len(fds)], flags) // Set the descriptor.
- fds = append(fds, i) // Record the file descriptor.
+ f.setVFS2(ctx, i, files[len(fds)], flags) // Set the descriptor.
+ fds = append(fds, i) // Record the file descriptor.
}
}
// Failure? Unwind existing FDs.
if len(fds) < len(files) {
for _, i := range fds {
- f.setVFS2(i, nil, FDFlags{}) // Zap entry.
+ f.setVFS2(ctx, i, nil, FDFlags{}) // Zap entry.
}
return nil, syscall.EMFILE
}
@@ -397,7 +396,7 @@ func (f *FDTable) NewFDVFS2(ctx context.Context, minfd int32, file *vfs.FileDesc
}
for fd < end {
if d, _, _ := f.getVFS2(fd); d == nil {
- f.setVFS2(fd, file, flags)
+ f.setVFS2(ctx, fd, file, flags)
if fd == f.next {
// Update next search start position.
f.next = fd + 1
@@ -439,14 +438,14 @@ func (f *FDTable) newFDAt(ctx context.Context, fd int32, file *fs.File, fileVFS2
// Install the entry.
f.mu.Lock()
defer f.mu.Unlock()
- f.setAll(fd, file, fileVFS2, flags)
+ f.setAll(ctx, fd, file, fileVFS2, flags)
return nil
}
// SetFlags sets the flags for the given file descriptor.
//
// True is returned iff flags were changed.
-func (f *FDTable) SetFlags(fd int32, flags FDFlags) error {
+func (f *FDTable) SetFlags(ctx context.Context, fd int32, flags FDFlags) error {
if fd < 0 {
// Don't accept negative FDs.
return syscall.EBADF
@@ -462,14 +461,14 @@ func (f *FDTable) SetFlags(fd int32, flags FDFlags) error {
}
// Update the flags.
- f.set(fd, file, flags)
+ f.set(ctx, fd, file, flags)
return nil
}
// SetFlagsVFS2 sets the flags for the given file descriptor.
//
// True is returned iff flags were changed.
-func (f *FDTable) SetFlagsVFS2(fd int32, flags FDFlags) error {
+func (f *FDTable) SetFlagsVFS2(ctx context.Context, fd int32, flags FDFlags) error {
if fd < 0 {
// Don't accept negative FDs.
return syscall.EBADF
@@ -485,7 +484,7 @@ func (f *FDTable) SetFlagsVFS2(fd int32, flags FDFlags) error {
}
// Update the flags.
- f.setVFS2(fd, file, flags)
+ f.setVFS2(ctx, fd, file, flags)
return nil
}
@@ -584,9 +583,9 @@ func (f *FDTable) Fork(ctx context.Context) *FDTable {
// reference for the clone. We don't need anything else.
switch {
case file != nil:
- clone.set(fd, file, flags)
+ clone.set(ctx, fd, file, flags)
case fileVFS2 != nil:
- clone.setVFS2(fd, fileVFS2, flags)
+ clone.setVFS2(ctx, fd, fileVFS2, flags)
}
})
return clone
@@ -595,7 +594,7 @@ func (f *FDTable) Fork(ctx context.Context) *FDTable {
// Remove removes an FD from and returns a non-file iff successful.
//
// N.B. Callers are required to use DecRef when they are done.
-func (f *FDTable) Remove(fd int32) (*fs.File, *vfs.FileDescription) {
+func (f *FDTable) Remove(ctx context.Context, fd int32) (*fs.File, *vfs.FileDescription) {
if fd < 0 {
return nil, nil
}
@@ -618,7 +617,7 @@ func (f *FDTable) Remove(fd int32) (*fs.File, *vfs.FileDescription) {
orig2.IncRef()
}
if orig != nil || orig2 != nil {
- f.setAll(fd, nil, nil, FDFlags{}) // Zap entry.
+ f.setAll(ctx, fd, nil, nil, FDFlags{}) // Zap entry.
}
return orig, orig2
}
@@ -630,7 +629,7 @@ func (f *FDTable) RemoveIf(ctx context.Context, cond func(*fs.File, *vfs.FileDes
f.forEach(ctx, func(fd int32, file *fs.File, fileVFS2 *vfs.FileDescription, flags FDFlags) {
if cond(file, fileVFS2, flags) {
- f.set(fd, nil, FDFlags{}) // Clear from table.
+ f.set(ctx, fd, nil, FDFlags{}) // Clear from table.
// Update current available position.
if fd < f.next {
f.next = fd
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-06 14:36:26 +0000