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-rw-r--r--pkg/p9/handlers.go18
-rw-r--r--pkg/p9/p9.go4
-rw-r--r--pkg/p9/p9test/client_test.go78
-rw-r--r--pkg/p9/version.go8
4 files changed, 64 insertions, 44 deletions
diff --git a/pkg/p9/handlers.go b/pkg/p9/handlers.go
index ba9a55d6d..51869c7d6 100644
--- a/pkg/p9/handlers.go
+++ b/pkg/p9/handlers.go
@@ -272,15 +272,15 @@ 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 (
diff --git a/pkg/p9/p9.go b/pkg/p9/p9.go
index 415200d60..d3090535a 100644
--- a/pkg/p9/p9.go
+++ b/pkg/p9/p9.go
@@ -47,10 +47,6 @@ const (
// OpenTruncate is a Tlopen flag indicating that the opened file should be
// truncated.
OpenTruncate OpenFlags = 01000
-
- // OpenFlagsIgnoreMask is a list of OpenFlags mode bits that are ignored for Tlopen.
- // Note that syscall.O_LARGEFILE is set to zero, use value from Linux fcntl.h.
- OpenFlagsIgnoreMask OpenFlags = syscall.O_DIRECTORY | syscall.O_NOATIME | 0100000
)
// ConnectFlags is the mode passed to Connect operations.
diff --git a/pkg/p9/p9test/client_test.go b/pkg/p9/p9test/client_test.go
index 8bbdb2488..6e758148d 100644
--- a/pkg/p9/p9test/client_test.go
+++ b/pkg/p9/p9test/client_test.go
@@ -1044,11 +1044,11 @@ func TestReaddir(t *testing.T) {
if _, err := f.Readdir(0, 1); err != syscall.EINVAL {
t.Errorf("readdir got %v, wanted EINVAL", err)
}
- if _, _, _, err := f.Open(p9.ReadWrite); err != syscall.EINVAL {
- t.Errorf("readdir got %v, wanted EINVAL", err)
+ if _, _, _, err := f.Open(p9.ReadWrite); err != syscall.EISDIR {
+ t.Errorf("readdir got %v, wanted EISDIR", err)
}
- if _, _, _, err := f.Open(p9.WriteOnly); err != syscall.EINVAL {
- t.Errorf("readdir got %v, wanted EINVAL", err)
+ if _, _, _, err := f.Open(p9.WriteOnly); err != syscall.EISDIR {
+ t.Errorf("readdir got %v, wanted EISDIR", err)
}
backend.EXPECT().Open(p9.ReadOnly).Times(1)
if _, _, _, err := f.Open(p9.ReadOnly); err != nil {
@@ -1065,75 +1065,93 @@ func TestReaddir(t *testing.T) {
func TestOpen(t *testing.T) {
type openTest struct {
name string
- mode p9.OpenFlags
+ flags p9.OpenFlags
err error
match func(p9.FileMode) bool
}
cases := []openTest{
{
- name: "invalid",
- mode: ^p9.OpenFlagsModeMask,
- err: syscall.EINVAL,
- match: func(p9.FileMode) bool { return true },
- },
- {
name: "not-openable-read-only",
- mode: p9.ReadOnly,
+ flags: p9.ReadOnly,
err: syscall.EINVAL,
match: func(mode p9.FileMode) bool { return !p9.CanOpen(mode) },
},
{
name: "not-openable-write-only",
- mode: p9.WriteOnly,
+ flags: p9.WriteOnly,
err: syscall.EINVAL,
match: func(mode p9.FileMode) bool { return !p9.CanOpen(mode) },
},
{
name: "not-openable-read-write",
- mode: p9.ReadWrite,
+ flags: p9.ReadWrite,
err: syscall.EINVAL,
match: func(mode p9.FileMode) bool { return !p9.CanOpen(mode) },
},
{
name: "directory-read-only",
- mode: p9.ReadOnly,
+ flags: p9.ReadOnly,
err: nil,
match: func(mode p9.FileMode) bool { return mode.IsDir() },
},
{
name: "directory-read-write",
- mode: p9.ReadWrite,
- err: syscall.EINVAL,
+ flags: p9.ReadWrite,
+ err: syscall.EISDIR,
match: func(mode p9.FileMode) bool { return mode.IsDir() },
},
{
name: "directory-write-only",
- mode: p9.WriteOnly,
- err: syscall.EINVAL,
+ flags: p9.WriteOnly,
+ err: syscall.EISDIR,
match: func(mode p9.FileMode) bool { return mode.IsDir() },
},
{
name: "read-only",
- mode: p9.ReadOnly,
+ flags: p9.ReadOnly,
err: nil,
match: func(mode p9.FileMode) bool { return p9.CanOpen(mode) },
},
{
name: "write-only",
- mode: p9.WriteOnly,
+ flags: p9.WriteOnly,
err: nil,
match: func(mode p9.FileMode) bool { return p9.CanOpen(mode) && !mode.IsDir() },
},
{
name: "read-write",
- mode: p9.ReadWrite,
+ flags: p9.ReadWrite,
+ err: nil,
+ match: func(mode p9.FileMode) bool { return p9.CanOpen(mode) && !mode.IsDir() },
+ },
+ {
+ name: "directory-read-only-truncate",
+ flags: p9.ReadOnly | p9.OpenTruncate,
+ err: syscall.EISDIR,
+ match: func(mode p9.FileMode) bool { return mode.IsDir() },
+ },
+ {
+ name: "read-only-truncate",
+ flags: p9.ReadOnly | p9.OpenTruncate,
+ err: nil,
+ match: func(mode p9.FileMode) bool { return p9.CanOpen(mode) && !mode.IsDir() },
+ },
+ {
+ name: "write-only-truncate",
+ flags: p9.WriteOnly | p9.OpenTruncate,
+ err: nil,
+ match: func(mode p9.FileMode) bool { return p9.CanOpen(mode) && !mode.IsDir() },
+ },
+ {
+ name: "read-write-truncate",
+ flags: p9.ReadWrite | p9.OpenTruncate,
err: nil,
match: func(mode p9.FileMode) bool { return p9.CanOpen(mode) && !mode.IsDir() },
},
}
- // Open(mode OpenFlags) (*fd.FD, QID, uint32, error)
+ // Open(flags OpenFlags) (*fd.FD, QID, uint32, error)
// - only works on Regular, NamedPipe, BLockDevice, CharacterDevice
// - returning a file works as expected
for name := range newTypeMap(nil) {
@@ -1171,25 +1189,25 @@ func TestOpen(t *testing.T) {
// Attempt the given open.
if tc.err != nil {
// We expect an error, just test and return.
- if _, _, _, err := f.Open(tc.mode); err != tc.err {
- t.Fatalf("open with mode %v got %v, want %v", tc.mode, err, tc.err)
+ if _, _, _, err := f.Open(tc.flags); err != tc.err {
+ t.Fatalf("open with flags %v got %v, want %v", tc.flags, err, tc.err)
}
return
}
// Run an FD test, since we expect success.
fdTest(t, func(send *fd.FD) *fd.FD {
- backend.EXPECT().Open(tc.mode).Return(send, p9.QID{}, uint32(0), nil).Times(1)
- recv, _, _, err := f.Open(tc.mode)
+ backend.EXPECT().Open(tc.flags).Return(send, p9.QID{}, uint32(0), nil).Times(1)
+ recv, _, _, err := f.Open(tc.flags)
if err != tc.err {
- t.Fatalf("open with mode %v got %v, want %v", tc.mode, err, tc.err)
+ t.Fatalf("open with flags %v got %v, want %v", tc.flags, err, tc.err)
}
return recv
})
// If the open was successful, attempt another one.
- if _, _, _, err := f.Open(tc.mode); err != syscall.EINVAL {
- t.Errorf("second open with mode %v got %v, want EINVAL", tc.mode, err)
+ if _, _, _, err := f.Open(tc.flags); err != syscall.EINVAL {
+ t.Errorf("second open with flags %v got %v, want EINVAL", tc.flags, err)
}
// Ensure that all illegal operations fail.
diff --git a/pkg/p9/version.go b/pkg/p9/version.go
index f1ffdd23a..36a694c58 100644
--- a/pkg/p9/version.go
+++ b/pkg/p9/version.go
@@ -26,7 +26,7 @@ const (
//
// Clients are expected to start requesting this version number and
// to continuously decrement it until a Tversion request succeeds.
- highestSupportedVersion uint32 = 8
+ highestSupportedVersion uint32 = 9
// lowestSupportedVersion is the lowest supported version X in a
// version string of the format 9P2000.L.Google.X.
@@ -155,3 +155,9 @@ func versionSupportsTallocate(v uint32) bool {
func versionSupportsFlipcall(v uint32) bool {
return v >= 8
}
+
+// VersionSupportsOpenTruncateFlag returns true if version v supports
+// passing the OpenTruncate flag to Tlopen.
+func VersionSupportsOpenTruncateFlag(v uint32) bool {
+ return v >= 9
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-29 00:00:07 +0000