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Diffstat (limited to 'pkg/p9/handlers.go')
-rw-r--r--pkg/p9/handlers.go145
1 files changed, 100 insertions, 45 deletions
diff --git a/pkg/p9/handlers.go b/pkg/p9/handlers.go
index ba9a55d6d..1db5797dd 100644
--- a/pkg/p9/handlers.go
+++ b/pkg/p9/handlers.go
@@ -48,6 +48,8 @@ func ExtractErrno(err error) syscall.Errno {
return ExtractErrno(e.Err)
case *os.SyscallError:
return ExtractErrno(e.Err)
+ case *os.LinkError:
+ return ExtractErrno(e.Err)
}
// Default case.
@@ -257,7 +259,6 @@ func CanOpen(mode FileMode) bool {
// handle implements handler.handle.
func (t *Tlopen) handle(cs *connState) message {
- // Lookup the FID.
ref, ok := cs.LookupFID(t.FID)
if !ok {
return newErr(syscall.EBADF)
@@ -272,15 +273,15 @@ func (t *Tlopen) handle(cs *connState) message {
return newErr(syscall.EINVAL)
}
- // Are flags valid?
- flags := t.Flags &^ OpenFlagsIgnoreMask
- if flags&^OpenFlagsModeMask != 0 {
- return newErr(syscall.EINVAL)
- }
-
- // Is this an attempt to open a directory as writable? Don't accept.
- if ref.mode.IsDir() && flags != ReadOnly {
- return newErr(syscall.EINVAL)
+ if ref.mode.IsDir() {
+ // Directory must be opened ReadOnly.
+ if t.Flags&OpenFlagsModeMask != ReadOnly {
+ return newErr(syscall.EISDIR)
+ }
+ // Directory not truncatable.
+ if t.Flags&OpenTruncate != 0 {
+ return newErr(syscall.EISDIR)
+ }
}
var (
@@ -294,7 +295,6 @@ func (t *Tlopen) handle(cs *connState) message {
return syscall.EINVAL
}
- // Do the open.
osFile, qid, ioUnit, err = ref.file.Open(t.Flags)
return err
}); err != nil {
@@ -311,12 +311,10 @@ func (t *Tlopen) handle(cs *connState) message {
}
func (t *Tlcreate) do(cs *connState, uid UID) (*Rlcreate, error) {
- // Don't allow complex names.
if err := checkSafeName(t.Name); err != nil {
return nil, err
}
- // Lookup the FID.
ref, ok := cs.LookupFID(t.FID)
if !ok {
return nil, syscall.EBADF
@@ -390,12 +388,10 @@ func (t *Tsymlink) handle(cs *connState) message {
}
func (t *Tsymlink) do(cs *connState, uid UID) (*Rsymlink, error) {
- // Don't allow complex names.
if err := checkSafeName(t.Name); err != nil {
return nil, err
}
- // Lookup the FID.
ref, ok := cs.LookupFID(t.Directory)
if !ok {
return nil, syscall.EBADF
@@ -426,19 +422,16 @@ func (t *Tsymlink) do(cs *connState, uid UID) (*Rsymlink, error) {
// handle implements handler.handle.
func (t *Tlink) handle(cs *connState) message {
- // Don't allow complex names.
if err := checkSafeName(t.Name); err != nil {
return newErr(err)
}
- // Lookup the FID.
ref, ok := cs.LookupFID(t.Directory)
if !ok {
return newErr(syscall.EBADF)
}
defer ref.DecRef()
- // Lookup the other FID.
refTarget, ok := cs.LookupFID(t.Target)
if !ok {
return newErr(syscall.EBADF)
@@ -467,7 +460,6 @@ func (t *Tlink) handle(cs *connState) message {
// handle implements handler.handle.
func (t *Trenameat) handle(cs *connState) message {
- // Don't allow complex names.
if err := checkSafeName(t.OldName); err != nil {
return newErr(err)
}
@@ -475,14 +467,12 @@ func (t *Trenameat) handle(cs *connState) message {
return newErr(err)
}
- // Lookup the FID.
ref, ok := cs.LookupFID(t.OldDirectory)
if !ok {
return newErr(syscall.EBADF)
}
defer ref.DecRef()
- // Lookup the other FID.
refTarget, ok := cs.LookupFID(t.NewDirectory)
if !ok {
return newErr(syscall.EBADF)
@@ -523,12 +513,10 @@ func (t *Trenameat) handle(cs *connState) message {
// handle implements handler.handle.
func (t *Tunlinkat) handle(cs *connState) message {
- // Don't allow complex names.
if err := checkSafeName(t.Name); err != nil {
return newErr(err)
}
- // Lookup the FID.
ref, ok := cs.LookupFID(t.Directory)
if !ok {
return newErr(syscall.EBADF)
@@ -577,19 +565,16 @@ func (t *Tunlinkat) handle(cs *connState) message {
// handle implements handler.handle.
func (t *Trename) handle(cs *connState) message {
- // Don't allow complex names.
if err := checkSafeName(t.Name); err != nil {
return newErr(err)
}
- // Lookup the FID.
ref, ok := cs.LookupFID(t.FID)
if !ok {
return newErr(syscall.EBADF)
}
defer ref.DecRef()
- // Lookup the target.
refTarget, ok := cs.LookupFID(t.Directory)
if !ok {
return newErr(syscall.EBADF)
@@ -641,7 +626,6 @@ func (t *Trename) handle(cs *connState) message {
// handle implements handler.handle.
func (t *Treadlink) handle(cs *connState) message {
- // Lookup the FID.
ref, ok := cs.LookupFID(t.FID)
if !ok {
return newErr(syscall.EBADF)
@@ -669,7 +653,6 @@ func (t *Treadlink) handle(cs *connState) message {
// handle implements handler.handle.
func (t *Tread) handle(cs *connState) message {
- // Lookup the FID.
ref, ok := cs.LookupFID(t.FID)
if !ok {
return newErr(syscall.EBADF)
@@ -708,7 +691,6 @@ func (t *Tread) handle(cs *connState) message {
// handle implements handler.handle.
func (t *Twrite) handle(cs *connState) message {
- // Lookup the FID.
ref, ok := cs.LookupFID(t.FID)
if !ok {
return newErr(syscall.EBADF)
@@ -747,12 +729,10 @@ func (t *Tmknod) handle(cs *connState) message {
}
func (t *Tmknod) do(cs *connState, uid UID) (*Rmknod, error) {
- // Don't allow complex names.
if err := checkSafeName(t.Name); err != nil {
return nil, err
}
- // Lookup the FID.
ref, ok := cs.LookupFID(t.Directory)
if !ok {
return nil, syscall.EBADF
@@ -791,12 +771,10 @@ func (t *Tmkdir) handle(cs *connState) message {
}
func (t *Tmkdir) do(cs *connState, uid UID) (*Rmkdir, error) {
- // Don't allow complex names.
if err := checkSafeName(t.Name); err != nil {
return nil, err
}
- // Lookup the FID.
ref, ok := cs.LookupFID(t.Directory)
if !ok {
return nil, syscall.EBADF
@@ -827,7 +805,6 @@ func (t *Tmkdir) do(cs *connState, uid UID) (*Rmkdir, error) {
// handle implements handler.handle.
func (t *Tgetattr) handle(cs *connState) message {
- // Lookup the FID.
ref, ok := cs.LookupFID(t.FID)
if !ok {
return newErr(syscall.EBADF)
@@ -856,7 +833,6 @@ func (t *Tgetattr) handle(cs *connState) message {
// handle implements handler.handle.
func (t *Tsetattr) handle(cs *connState) message {
- // Lookup the FID.
ref, ok := cs.LookupFID(t.FID)
if !ok {
return newErr(syscall.EBADF)
@@ -883,7 +859,6 @@ func (t *Tsetattr) handle(cs *connState) message {
// handle implements handler.handle.
func (t *Tallocate) handle(cs *connState) message {
- // Lookup the FID.
ref, ok := cs.LookupFID(t.FID)
if !ok {
return newErr(syscall.EBADF)
@@ -917,7 +892,6 @@ func (t *Tallocate) handle(cs *connState) message {
// handle implements handler.handle.
func (t *Txattrwalk) handle(cs *connState) message {
- // Lookup the FID.
ref, ok := cs.LookupFID(t.FID)
if !ok {
return newErr(syscall.EBADF)
@@ -930,7 +904,6 @@ func (t *Txattrwalk) handle(cs *connState) message {
// handle implements handler.handle.
func (t *Txattrcreate) handle(cs *connState) message {
- // Lookup the FID.
ref, ok := cs.LookupFID(t.FID)
if !ok {
return newErr(syscall.EBADF)
@@ -942,8 +915,96 @@ func (t *Txattrcreate) handle(cs *connState) message {
}
// handle implements handler.handle.
+func (t *Tgetxattr) handle(cs *connState) message {
+ ref, ok := cs.LookupFID(t.FID)
+ if !ok {
+ return newErr(syscall.EBADF)
+ }
+ defer ref.DecRef()
+
+ var val string
+ if err := ref.safelyRead(func() (err error) {
+ // Don't allow getxattr on files that have been deleted.
+ if ref.isDeleted() {
+ return syscall.EINVAL
+ }
+ val, err = ref.file.GetXattr(t.Name, t.Size)
+ return err
+ }); err != nil {
+ return newErr(err)
+ }
+ return &Rgetxattr{Value: val}
+}
+
+// handle implements handler.handle.
+func (t *Tsetxattr) handle(cs *connState) message {
+ ref, ok := cs.LookupFID(t.FID)
+ if !ok {
+ return newErr(syscall.EBADF)
+ }
+ defer ref.DecRef()
+
+ if err := ref.safelyWrite(func() error {
+ // Don't allow setxattr on files that have been deleted.
+ if ref.isDeleted() {
+ return syscall.EINVAL
+ }
+ return ref.file.SetXattr(t.Name, t.Value, t.Flags)
+ }); err != nil {
+ return newErr(err)
+ }
+ return &Rsetxattr{}
+}
+
+// handle implements handler.handle.
+func (t *Tlistxattr) handle(cs *connState) message {
+ ref, ok := cs.LookupFID(t.FID)
+ if !ok {
+ return newErr(syscall.EBADF)
+ }
+ defer ref.DecRef()
+
+ var xattrs map[string]struct{}
+ if err := ref.safelyRead(func() (err error) {
+ // Don't allow listxattr on files that have been deleted.
+ if ref.isDeleted() {
+ return syscall.EINVAL
+ }
+ xattrs, err = ref.file.ListXattr(t.Size)
+ return err
+ }); err != nil {
+ return newErr(err)
+ }
+
+ xattrList := make([]string, 0, len(xattrs))
+ for x := range xattrs {
+ xattrList = append(xattrList, x)
+ }
+ return &Rlistxattr{Xattrs: xattrList}
+}
+
+// handle implements handler.handle.
+func (t *Tremovexattr) handle(cs *connState) message {
+ ref, ok := cs.LookupFID(t.FID)
+ if !ok {
+ return newErr(syscall.EBADF)
+ }
+ defer ref.DecRef()
+
+ if err := ref.safelyWrite(func() error {
+ // Don't allow removexattr on files that have been deleted.
+ if ref.isDeleted() {
+ return syscall.EINVAL
+ }
+ return ref.file.RemoveXattr(t.Name)
+ }); err != nil {
+ return newErr(err)
+ }
+ return &Rremovexattr{}
+}
+
+// handle implements handler.handle.
func (t *Treaddir) handle(cs *connState) message {
- // Lookup the FID.
ref, ok := cs.LookupFID(t.Directory)
if !ok {
return newErr(syscall.EBADF)
@@ -977,7 +1038,6 @@ func (t *Treaddir) handle(cs *connState) message {
// handle implements handler.handle.
func (t *Tfsync) handle(cs *connState) message {
- // Lookup the FID.
ref, ok := cs.LookupFID(t.FID)
if !ok {
return newErr(syscall.EBADF)
@@ -1001,7 +1061,6 @@ func (t *Tfsync) handle(cs *connState) message {
// handle implements handler.handle.
func (t *Tstatfs) handle(cs *connState) message {
- // Lookup the FID.
ref, ok := cs.LookupFID(t.FID)
if !ok {
return newErr(syscall.EBADF)
@@ -1192,7 +1251,6 @@ func doWalk(cs *connState, ref *fidRef, names []string, getattr bool) (qids []QI
// handle implements handler.handle.
func (t *Twalk) handle(cs *connState) message {
- // Lookup the FID.
ref, ok := cs.LookupFID(t.FID)
if !ok {
return newErr(syscall.EBADF)
@@ -1213,7 +1271,6 @@ func (t *Twalk) handle(cs *connState) message {
// handle implements handler.handle.
func (t *Twalkgetattr) handle(cs *connState) message {
- // Lookup the FID.
ref, ok := cs.LookupFID(t.FID)
if !ok {
return newErr(syscall.EBADF)
@@ -1270,7 +1327,6 @@ func (t *Tumknod) handle(cs *connState) message {
// handle implements handler.handle.
func (t *Tlconnect) handle(cs *connState) message {
- // Lookup the FID.
ref, ok := cs.LookupFID(t.FID)
if !ok {
return newErr(syscall.EBADF)
@@ -1303,7 +1359,6 @@ func (t *Tchannel) handle(cs *connState) message {
return newErr(err)
}
- // Lookup the given channel.
ch := cs.lookupChannel(t.ID)
if ch == nil {
return newErr(syscall.ENOSYS)
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-08 12:58:15 +0000