fix(dfm-mount): stop GMountOperation signal emission to prevent premature UNHANDLED reply - #391
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deepin-bot[bot] merged 1 commit intoSep 8, 2026
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…ture UNHANDLED reply Root cause: gio's GMountOperation default class handlers (G_SIGNAL_RUN_LAST) schedule an idle reply of G_MOUNT_OPERATION_UNHANDLED after instance handlers return. On first-time SFTP login, gvfs sends ask-question (host key) followed by ask-password. The stale UNHANDLED idle queued by the question stage may still be pending when the AskPassword DBus call is dispatched (priority race: G_PRIORITY_DEFAULT dispatch vs G_PRIORITY_DEFAULT_IDLE idle); it then fires inside the modal password dialog's nested event loop, completes the pending AskPassword invocation as handled=FALSE, and gvfs fails the mount with "Password dialog cancelled" (密码对话框被取消) — reproducible when the UI is busy/event-starved on the password dialog, exactly matching the reported first-login SFTP mount failure. Fix: call g_signal_stop_emission_by_name() in both mountByGvfsAskQuestion and mountByGvfsAskPasswd, same as gvfs' own client implementation (gmountsource.c op_ask_password/op_ask_question). All reply paths already call g_mount_operation_reply explicitly, so stopping the default handler is safe. Verified with a minimal gio reproducer against a local SFTP server: - busy mode (stale idle + nested dialog loop): mount fails with "密码对话框被取消" (G_IO_ERROR_FAILED_HANDLED) before the fix - with stop_emission: mount succeeds under identical conditions Log: 修复首次登录挂载sftp点击仍然登录后提示挂载失败密码对话框被取消 Influence: sftp/ftp/smb 挂载过程中密码与主机密钥确认对话框交互不再被 gio 默认处理器竞态打断 Bug: https://pms.uniontech.com/bug-view-376305.html Change-Id: I1f9e2d6c4b7a48e3952f0a1d8e6c5b3a7f2d4e8c
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Reviewer's guide (collapsed on small PRs)Reviewer's GuideUpdates GVFS question and password handlers to stop GMountOperation’s default signal emission, preventing stale idle UNHANDLED responses from racing with SFTP authentication dialogs and causing first-time mounts to fail as cancelled. Sequence diagram for preventing premature SFTP mount cancellationsequenceDiagram
participant GVFS
participant GMountOperation
participant DNetworkMounter
participant Dialog as AuthenticationDialog
GVFS->>GMountOperation: emit ask-question or ask-password
GMountOperation->>DNetworkMounter: mountByGvfsAskQuestion() / mountByGvfsAskPasswd()
DNetworkMounter->>GMountOperation: g_signal_stop_emission_by_name()
DNetworkMounter->>Dialog: show host-key or password dialog
Dialog-->>DNetworkMounter: explicit reply
DNetworkMounter-->>GVFS: handled reply
Note over GMountOperation,GVFS: Default UNHANDLED idle is not scheduled
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This pr force merged! (status: blocked) |
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Cherry-pick of PR #389 to master.
Cherry-pick of commit 8081779 to the master branch.
Changes: In
src/dfm-mount/private/dnetworkmounter.cpp, addg_signal_stop_emission_by_name()calls at the entry ofmountByGvfsAskQuestionandmountByGvfsAskPasswdto prevent premature UNHANDLED reply when mounting SFTP for the first time.Compilation verified:
cmake -B build -DCMAKE_BUILD_TYPE=Release+cmake --build build --target dfm6-mountpasses with no new errors or warnings.Summary by Sourcery
Bug Fixes: