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]j%ah"]h$]h&]uh1jhjubj)}(h h]h }(hjhhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjubh)}(hhh]j)}(h tty_structh]h tty_struct}(hjhhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjubah}(h]h ]h"]h$]h&] refdomainjOreftypejQ reftargetjmodnameN classnameNjUjX)}j[]j^)}jQjsbc.tty_kref_putasbuh1hhjubj)}(h h]h }(hjhhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjubjr)}(hjuh]h*}(hj hhhNhNubah}(h]h ]j~ah"]h$]h&]uh1jqhjubj)}(httyh]htty}(hj hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]noemphhhuh1jhjubah}(h]h ]h"]h$]h&]hhuh1j hjhhhjhMubeh}(h]h ]h"]h$]h&]hhjuh1jjjhj|hhhjhMubah}(h]jwah ](jjeh"]h$]h&]jj)jhuh1jhjhMhjyhhubj)}(hhh]h)}(hrelease a tty krefh]hrelease a tty kref}(hjD hhhNhNubah}(h]h ]h"]h$]h&]uh1hh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:32: ./drivers/tty/tty_io.chMhjA hhubah}(h]h ]h"]h$]h&]uh1jhjyhhhjhMubeh}(h]h ](jOfunctioneh"]h$]h&]jjOjj\ jj\ jjjuh1jhhhjwhNhNubj)}(h**Parameters** ``struct tty_struct *tty`` tty device **Description** Release a reference to the **tty** device and if need be let the 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hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhj+ hhhj= hMubj)}(htty_standard_installh]j)}(htty_standard_installh]htty_standard_install}(hjP hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjL ubah}(h]h ](jjeh"]h$]h&]hhuh1jhj+ hhhj= hMubj )}(h3(struct tty_driver *driver, struct tty_struct *tty)h](j)}(hstruct tty_driver *driverh](j)}(hjh]hstruct}(hjl hhhNhNubah}(h]h ]j%ah"]h$]h&]uh1jhjh ubj)}(h h]h }(hjy hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjh ubh)}(hhh]j)}(h tty_driverh]h tty_driver}(hj hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhj ubah}(h]h ]h"]h$]h&] refdomainjOreftypejQ reftargetj modnameN classnameNjUjX)}j[]j^)}jQjR sbc.tty_standard_installasbuh1hhjh ubj)}(h h]h }(hj hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjh ubjr)}(hjuh]h*}(hj hhhNhNubah}(h]h ]j~ah"]h$]h&]uh1jqhjh ubj)}(hdriverh]hdriver}(hj hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjh ubeh}(h]h ]h"]h$]h&]noemphhhuh1jhjd ubj)}(hstruct tty_struct *ttyh](j)}(hjh]hstruct}(hj hhhNhNubah}(h]h ]j%ah"]h$]h&]uh1jhj ubj)}(h h]h }(hj hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhj ubh)}(hhh]j)}(h tty_structh]h tty_struct}(hj hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhj ubah}(h]h ]h"]h$]h&] refdomainjOreftypejQ reftargetj modnameN classnameNjUjX)}j[]j c.tty_standard_installasbuh1hhj ubj)}(h h]h }(hj hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhj ubjr)}(hjuh]h*}(hj( hhhNhNubah}(h]h ]j~ah"]h$]h&]uh1jqhj ubj)}(httyh]htty}(hj5 hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhj ubeh}(h]h ]h"]h$]h&]noemphhhuh1jhjd ubeh}(h]h ]h"]h$]h&]hhuh1j hj+ hhhj= hMubeh}(h]h ]h"]h$]h&]hhjuh1jjjhj' hhhj= hMubah}(h]j" ah ](jjeh"]h$]h&]jj)jhuh1jhj= hMhj$ hhubj)}(hhh]h)}(husual tty->ops->installh]husual tty->ops->install}(hj_ hhhNhNubah}(h]h ]h"]h$]h&]uh1hh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:38: ./drivers/tty/tty_io.chMhj\ hhubah}(h]h ]h"]h$]h&]uh1jhj$ hhhj= hMubeh}(h]h ](jOfunctioneh"]h$]h&]jjOjjw jjw jjjuh1jhhhj hNhNubj)}(h**Parameters** ``struct tty_driver *driver`` the driver for the tty ``struct tty_struct *tty`` the tty **Description** If the **driver** overrides **tty->ops->install**, it still can call this 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./drivers/tty/tty_io.chMhj ubj )}(hhh]h)}(hthe ttyh]hthe tty}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhj hMhj ubah}(h]h ]h"]h$]h&]uh1jhj ubeh}(h]h ]h"]h$]h&]uh1jhj hMhj ubeh}(h]h ]h"]h$]h&]uh1jhj{ ubh)}(h**Description**h]j)}(hj h]h Description}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1jhj ubah}(h]h ]h"]h$]h&]uh1hh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:38: ./drivers/tty/tty_io.chMhj{ ubh)}(h~If the **driver** overrides **tty->ops->install**, it still can call this function to perform the standard install operations.h](hIf the }(hj* hhhNhNubj)}(h **driver**h]hdriver}(hj2 hhhNhNubah}(h]h ]h"]h$]h&]uh1jhj* ubh overrides }(hj* hhhNhNubj)}(h**tty->ops->install**h]htty->ops->install}(hjD hhhNhNubah}(h]h ]h"]h$]h&]uh1jhj* ubhM, it still can call this function to perform the standard install operations.}(hj* hhhNhNubeh}(h]h ]h"]h$]h&]uh1hh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:38: ./drivers/tty/tty_io.chMhj{ ubeh}(h]h ] kernelindentah"]h$]h&]uh1jhj hhhNhNubeh}(h]jhah ]h"]installah$]h&]uh1hhhhhhhhK$ubh)}(hhh](h)}(h Read & Writeh]h Read & Write}(hjn hhhNhNubah}(h]h ]h"]h$]h&]jjuh1hhjk hhhhhK*ubj)}(hhh]h}(h]h ]h"]h$]h&]entries](jtty_put_char (C function)c.tty_put_charhNtauh1jhjk hhhNhNubj)}(hhh](j)}(h0int tty_put_char (struct tty_struct *tty, u8 ch)h]j)}(h/int tty_put_char(struct tty_struct *tty, u8 ch)h](j)}(hinth]hint}(hj hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhj hhh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:44: ./drivers/tty/tty_io.chM9 ubj)}(h h]h }(hj hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhj hhhj hM9 ubj)}(h tty_put_charh]j)}(h tty_put_charh]h tty_put_char}(hj hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhj ubah}(h]h ](jjeh"]h$]h&]hhuh1jhj hhhj hM9 ubj )}(h(struct tty_struct *tty, u8 ch)h](j)}(hstruct tty_struct *ttyh](j)}(hjh]hstruct}(hj hhhNhNubah}(h]h ]j%ah"]h$]h&]uh1jhj ubj)}(h h]h }(hj hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhj ubh)}(hhh]j)}(h tty_structh]h tty_struct}(hj hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhj ubah}(h]h ]h"]h$]h&] refdomainjOreftypejQ reftargetj modnameN classnameNjUjX)}j[]j^)}jQj sbc.tty_put_charasbuh1hhj ubj)}(h h]h }(hj hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhj ubjr)}(hjuh]h*}(hj hhhNhNubah}(h]h ]j~ah"]h$]h&]uh1jqhj ubj)}(httyh]htty}(hj+ hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhj ubeh}(h]h ]h"]h$]h&]noemphhhuh1jhj ubj)}(hu8 chh](h)}(hhh]j)}(hu8h]hu8}(hjG hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjD ubah}(h]h ]h"]h$]h&] refdomainjOreftypejQ reftargetjI modnameN classnameNjUjX)}j[]j c.tty_put_charasbuh1hhj@ ubj)}(h h]h }(hje hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhj@ ubj)}(hchh]hch}(hjs hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhj@ ubeh}(h]h ]h"]h$]h&]noemphhhuh1jhj ubeh}(h]h ]h"]h$]h&]hhuh1j hj hhhj hM9 ubeh}(h]h ]h"]h$]h&]hhjuh1jjjhj hhhj hM9 ubah}(h]j ah ](jjeh"]h$]h&]jj)jhuh1jhj hM9 hj hhubj)}(hhh]h)}(hwrite one character to a ttyh]hwrite one character to a tty}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:44: ./drivers/tty/tty_io.chM9 hj hhubah}(h]h ]h"]h$]h&]uh1jhj hhhj hM9 ubeh}(h]h ](jOfunctioneh"]h$]h&]jjOjj jj jjjuh1jhhhjk hNhNubj)}(hXu**Parameters** ``struct tty_struct *tty`` tty ``u8 ch`` character to write **Description** Write one byte to the **tty** using the provided **tty->ops->put_char\(\)** method if present. **Note** the specific put_char operation in the driver layer may go away soon. 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Locking: flow.lockh](h)}(h**Parameters**h]j)}(hjh]h Parameters}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhjubah}(h]h ]h"]h$]h&]uh1hh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:50: ./drivers/tty/tty_io.chMhjubj)}(hhh]j)}(h'``struct tty_struct *tty`` tty to stop h](j)}(h``struct tty_struct *tty``h]j )}(hj"h]hstruct tty_struct *tty}(hj$hhhNhNubah}(h]h ]h"]h$]h&]uh1j hj ubah}(h]h ]h"]h$]h&]uh1jh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:50: ./drivers/tty/tty_io.chMhjubj )}(hhh]h)}(h tty to stoph]h tty to stop}(hj;hhhNhNubah}(h]h ]h"]h$]h&]uh1hhj7hMhj8ubah}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]uh1jhj7hMhjubah}(h]h ]h"]h$]h&]uh1jhjubh)}(h**Description**h]j)}(hj]h]h Description}(hj_hhhNhNubah}(h]h ]h"]h$]h&]uh1jhj[ubah}(h]h ]h"]h$]h&]uh1hh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:50: ./drivers/tty/tty_io.chMhjubh)}(hPerform flow control to the driver. May be called on an already stopped device and will not re-call the :c:type:`tty_driver->stop\(\) ` method.h](hhPerform flow control to the driver. May be called on an already stopped device and will not re-call the }(hjshhhNhNubh)}(h+:c:type:`tty_driver->stop\(\) `h]j )}(hj}h]htty_driver->stop()}(hjhhhNhNubah}(h]h ](xrefjOc-typeeh"]h$]h&]uh1j hj{ubah}(h]h ]h"]h$]h&]refdocdriver-api/tty/tty_struct refdomainjOreftypetype refexplicitrefwarnjUjX)}j[]sb reftarget tty_driveruh1hh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:50: ./drivers/tty/tty_io.chMhjsubh method.}(hjshhhNhNubeh}(h]h ]h"]h$]h&]uh1hhjhMhjubh)}(hThis functionality is used by both the line disciplines for halting incoming flow and by the driver. It may therefore be called from any context, may be under the tty ``atomic_write_lock`` but not always.h](hThis functionality is used by both the line disciplines for halting incoming flow and by the driver. It may therefore be called from any context, may be under the tty }(hjhhhNhNubj )}(h``atomic_write_lock``h]hatomic_write_lock}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1j hjubh but not always.}(hjhhhNhNubeh}(h]h ]h"]h$]h&]uh1hh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:50: ./drivers/tty/tty_io.chMhjubj)}(hhh]j)}(hLocking: flow.lockh](j)}(hLocking:h]hLocking:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:50: ./drivers/tty/tty_io.chMhjubj )}(hhh]h)}(h flow.lockh]h flow.lock}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:50: ./drivers/tty/tty_io.chMhjubah}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]uh1jhjhMhjubah}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ] kernelindentah"]h$]h&]uh1jhjhhhNhNubj)}(hhh]h}(h]h ]h"]h$]h&]entries](jstart_tty (C function) c.start_ttyhNtauh1jhjhhhNhNubj)}(hhh](j)}(h'void start_tty (struct tty_struct *tty)h]j)}(h&void start_tty(struct tty_struct *tty)h](j)}(hvoidh]hvoid}(hj&hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhj"hhh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:50: ./drivers/tty/tty_io.chMubj)}(h h]h }(hj5hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhj"hhhj4hMubj)}(h start_ttyh]j)}(h start_ttyh]h start_tty}(hjGhhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjCubah}(h]h ](jjeh"]h$]h&]hhuh1jhj"hhhj4hMubj )}(h(struct tty_struct *tty)h]j)}(hstruct tty_struct *ttyh](j)}(hjh]hstruct}(hjchhhNhNubah}(h]h ]j%ah"]h$]h&]uh1jhj_ubj)}(h h]h }(hjphhhNhNubah}(h]h ]jah"]h$]h&]uh1jhj_ubh)}(hhh]j)}(h tty_structh]h tty_struct}(hjhhhNhNubah}(h]h ]jah"]h$]h&]uh1jhj~ubah}(h]h ]h"]h$]h&] refdomainjOreftypejQ reftargetjmodnameN classnameNjUjX)}j[]j^)}jQjIsb c.start_ttyasbuh1hhj_ubj)}(h h]h }(hjhhhNhNubah}(h]h ]jah"]h$]h&]uh1jhj_ubjr)}(hjuh]h*}(hjhhhNhNubah}(h]h ]j~ah"]h$]h&]uh1jqhj_ubj)}(httyh]htty}(hjhhhNhNubah}(h]h ]jah"]h$]h&]uh1jhj_ubeh}(h]h ]h"]h$]h&]noemphhhuh1jhj[ubah}(h]h ]h"]h$]h&]hhuh1j hj"hhhj4hMubeh}(h]h ]h"]h$]h&]hhjuh1jjjhjhhhj4hMubah}(h]jah ](jjeh"]h$]h&]jj)jhuh1jhj4hMhjhhubj)}(hhh]h)}(hpropagate flow controlh]hpropagate flow control}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:50: ./drivers/tty/tty_io.chMhjhhubah}(h]h ]h"]h$]h&]uh1jhjhhhj4hMubeh}(h]h ](jOfunctioneh"]h$]h&]jjOjjjjjjjuh1jhhhjhNhNubj)}(hX8**Parameters** ``struct tty_struct *tty`` tty to start **Description** Start a tty that has been stopped if at all possible. If **tty** was previously stopped and is now being started, the :c:type:`tty_driver->start\(\) ` method is invoked and the line discipline woken. Locking: flow.lockh](h)}(h**Parameters**h]j)}(hjh]h Parameters}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1jhjubah}(h]h ]h"]h$]h&]uh1hh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:50: ./drivers/tty/tty_io.chMhjubj)}(hhh]j)}(h(``struct tty_struct *tty`` tty to start h](j)}(h``struct tty_struct *tty``h]j )}(hj'h]hstruct tty_struct *tty}(hj)hhhNhNubah}(h]h ]h"]h$]h&]uh1j hj%ubah}(h]h ]h"]h$]h&]uh1jh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:50: ./drivers/tty/tty_io.chMhj!ubj )}(hhh]h)}(h tty to starth]h tty to start}(hj@hhhNhNubah}(h]h ]h"]h$]h&]uh1hhj<hMhj=ubah}(h]h ]h"]h$]h&]uh1jhj!ubeh}(h]h ]h"]h$]h&]uh1jhj<hMhjubah}(h]h ]h"]h$]h&]uh1jhjubh)}(h**Description**h]j)}(hjbh]h Description}(hjdhhhNhNubah}(h]h ]h"]h$]h&]uh1jhj`ubah}(h]h ]h"]h$]h&]uh1hh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:50: ./drivers/tty/tty_io.chMhjubh)}(hStart a tty that has been stopped if at all possible. 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If }(hjxhhhNhNubj)}(h**tty**h]htty}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhjxubh6 was previously stopped and is now being started, the }(hjxhhhNhNubh)}(h,:c:type:`tty_driver->start\(\) `h]j )}(hjh]htty_driver->start()}(hjhhhNhNubah}(h]h ](jjOc-typeeh"]h$]h&]uh1j hjubah}(h]h ]h"]h$]h&]refdocj refdomainjOreftypetype refexplicitrefwarnjUjj tty_driveruh1hh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:50: ./drivers/tty/tty_io.chMhjxubh1 method is invoked and the line discipline woken.}(hjxhhhNhNubeh}(h]h ]h"]h$]h&]uh1hhjhMhjubj)}(hhh]j)}(hLocking: flow.lockh](j)}(hLocking:h]hLocking:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:50: ./drivers/tty/tty_io.chMhjubj )}(hhh]h)}(h flow.lockh]h flow.lock}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:50: ./drivers/tty/tty_io.chMhjubah}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]uh1jhjhMhjubah}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ] kernelindentah"]h$]h&]uh1jhjhhhNhNubeh}(h]jah ]h"] start & stopah$]h&]uh1hhhhhhhhK0ubh)}(hhh](h)}(hWakeuph]hWakeup}(hjhhhNhNubah}(h]h ]h"]h$]h&]jjuh1hhjhhhhhK6ubj)}(hhh]h}(h]h ]h"]h$]h&]entries](jtty_wakeup (C function) c.tty_wakeuphNtauh1jhjhhhNhNubj)}(hhh](j)}(h(void tty_wakeup (struct tty_struct *tty)h]j)}(h'void tty_wakeup(struct tty_struct *tty)h](j)}(hvoidh]hvoid}(hj.hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhj*hhh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:56: ./drivers/tty/tty_io.chMubj)}(h h]h }(hj=hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhj*hhhj<hMubj)}(h tty_wakeuph]j)}(h tty_wakeuph]h tty_wakeup}(hjOhhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjKubah}(h]h ](jjeh"]h$]h&]hhuh1jhj*hhhj<hMubj )}(h(struct tty_struct *tty)h]j)}(hstruct tty_struct *ttyh](j)}(hjh]hstruct}(hjkhhhNhNubah}(h]h ]j%ah"]h$]h&]uh1jhjgubj)}(h h]h }(hjxhhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjgubh)}(hhh]j)}(h tty_structh]h tty_struct}(hjhhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjubah}(h]h ]h"]h$]h&] refdomainjOreftypejQ reftargetjmodnameN classnameNjUjX)}j[]j^)}jQjQsb c.tty_wakeupasbuh1hhjgubj)}(h h]h }(hjhhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjgubjr)}(hjuh]h*}(hjhhhNhNubah}(h]h ]j~ah"]h$]h&]uh1jqhjgubj)}(httyh]htty}(hjhhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjgubeh}(h]h ]h"]h$]h&]noemphhhuh1jhjcubah}(h]h ]h"]h$]h&]hhuh1j hj*hhhj<hMubeh}(h]h ]h"]h$]h&]hhjuh1jjjhj&hhhj<hMubah}(h]j!ah ](jjeh"]h$]h&]jj)jhuh1jhj<hMhj#hhubj)}(hhh]h)}(hrequest more datah]hrequest more data}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:56: ./drivers/tty/tty_io.chMhjhhubah}(h]h ]h"]h$]h&]uh1jhj#hhhj<hMubeh}(h]h ](jOfunctioneh"]h$]h&]jjOjjjjjjjuh1jhhhjhNhNubj)}(h**Parameters** ``struct tty_struct *tty`` terminal **Description** Internal and external helper for wakeups of tty. 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We do this synchronously so that when the syscall returns the process is complete. That guarantee is necessary for security reasons.h]hThe user has asked via system call for the terminal to be hung up. We do this synchronously so that when the syscall returns the process is complete. That guarantee is necessary for security reasons.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:62: ./drivers/tty/tty_io.chMhj6ubeh}(h]h ] kernelindentah"]h$]h&]uh1jhjhhhNhNubj)}(hhh]h}(h]h ]h"]h$]h&]entries](jtty_hung_up_p (C function)c.tty_hung_up_phNtauh1jhjhhhNhNubj)}(hhh](j)}(h%int tty_hung_up_p (struct file *filp)h]j)}(h$int tty_hung_up_p(struct file *filp)h](j)}(hinth]hint}(hjhhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjhhh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:62: ./drivers/tty/tty_io.chMubj)}(h h]h }(hjhhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjhhhjhMubj)}(h tty_hung_up_ph]j)}(h tty_hung_up_ph]h tty_hung_up_p}(hjhhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjubah}(h]h ](jjeh"]h$]h&]hhuh1jhjhhhjhMubj )}(h(struct file *filp)h]j)}(hstruct file *filph](j)}(hjh]hstruct}(hjhhhNhNubah}(h]h ]j%ah"]h$]h&]uh1jhjubj)}(h h]h }(hj%hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjubh)}(hhh]j)}(hfileh]hfile}(hj6hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhj3ubah}(h]h ]h"]h$]h&] refdomainjOreftypejQ reftargetj8modnameN classnameNjUjX)}j[]j^)}jQjsbc.tty_hung_up_pasbuh1hhjubj)}(h h]h }(hjVhhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjubjr)}(hjuh]h*}(hjdhhhNhNubah}(h]h ]j~ah"]h$]h&]uh1jqhjubj)}(hfilph]hfilp}(hjqhhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]noemphhhuh1jhjubah}(h]h ]h"]h$]h&]hhuh1j hjhhhjhMubeh}(h]h ]h"]h$]h&]hhjuh1jjjhjhhhjhMubah}(h]jah ](jjeh"]h$]h&]jj)jhuh1jhjhMhjhhubj)}(hhh]h)}(hwas tty hung uph]hwas tty hung up}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:62: ./drivers/tty/tty_io.chMhjhhubah}(h]h ]h"]h$]h&]uh1jhjhhhjhMubeh}(h]h ](jOfunctioneh"]h$]h&]jjOjjjjjjjuh1jhhhjhNhNubj)}(h**Parameters** ``struct file *filp`` file pointer of tty **Return** true if the tty has been subject to a vhangup or a carrier lossh](h)}(h**Parameters**h]j)}(hjh]h Parameters}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhjubah}(h]h ]h"]h$]h&]uh1hh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:62: ./drivers/tty/tty_io.chMhjubj)}(hhh]j)}(h*``struct file *filp`` file pointer of tty h](j)}(h``struct file *filp``h]j )}(hjh]hstruct file *filp}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1j hjubah}(h]h ]h"]h$]h&]uh1jh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:62: ./drivers/tty/tty_io.chMhjubj )}(hhh]h)}(hfile pointer of ttyh]hfile pointer of tty}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhjhMhjubah}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]uh1jhjhMhjubah}(h]h ]h"]h$]h&]uh1jhjubh)}(h **Return**h]j)}(hjh]hReturn}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhjubah}(h]h ]h"]h$]h&]uh1hh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:62: ./drivers/tty/tty_io.chMhjubh)}(h?true if the tty has been subject to a vhangup or a carrier lossh]h?true if the tty has been subject to a vhangup or a carrier loss}(hj-hhhNhNubah}(h]h ]h"]h$]h&]uh1hh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:62: ./drivers/tty/tty_io.chMhjubeh}(h]h ] kernelindentah"]h$]h&]uh1jhjhhhNhNubeh}(h]jah ]h"]hangupah$]h&]uh1hhhhhhhhKint tty_do_resize (struct tty_struct *tty, struct winsize *ws)h]j)}(h=int tty_do_resize(struct tty_struct *tty, struct winsize *ws)h](j)}(hinth]hint}(hjthhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjphhh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:68: ./drivers/tty/tty_io.chMubj)}(h h]h }(hjhhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjphhhjhMubj)}(h tty_do_resizeh]j)}(h tty_do_resizeh]h tty_do_resize}(hjhhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjubah}(h]h ](jjeh"]h$]h&]hhuh1jhjphhhjhMubj )}(h,(struct tty_struct *tty, struct winsize *ws)h](j)}(hstruct tty_struct *ttyh](j)}(hjh]hstruct}(hjhhhNhNubah}(h]h ]j%ah"]h$]h&]uh1jhjubj)}(h h]h }(hjhhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjubh)}(hhh]j)}(h tty_structh]h tty_struct}(hjhhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjubah}(h]h ]h"]h$]h&] refdomainjOreftypejQ reftargetjmodnameN classnameNjUjX)}j[]j^)}jQjsbc.tty_do_resizeasbuh1hhjubj)}(h h]h }(hjhhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjubjr)}(hjuh]h*}(hjhhhNhNubah}(h]h ]j~ah"]h$]h&]uh1jqhjubj)}(httyh]htty}(hj hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]noemphhhuh1jhjubj)}(hstruct winsize *wsh](j)}(hjh]hstruct}(hj#hhhNhNubah}(h]h ]j%ah"]h$]h&]uh1jhjubj)}(h h]h }(hj0hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjubh)}(hhh]j)}(hwinsizeh]hwinsize}(hjAhhhNhNubah}(h]h ]jah"]h$]h&]uh1jhj>ubah}(h]h ]h"]h$]h&] refdomainjOreftypejQ reftargetjCmodnameN classnameNjUjX)}j[]jc.tty_do_resizeasbuh1hhjubj)}(h h]h }(hj_hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjubjr)}(hjuh]h*}(hjmhhhNhNubah}(h]h ]j~ah"]h$]h&]uh1jqhjubj)}(hwsh]hws}(hjzhhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]noemphhhuh1jhjubeh}(h]h ]h"]h$]h&]hhuh1j hjphhhjhMubeh}(h]h ]h"]h$]h&]hhjuh1jjjhjlhhhjhMubah}(h]jgah ](jjeh"]h$]h&]jj)jhuh1jhjhMhjihhubj)}(hhh]h)}(h resize eventh]h resize event}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:68: ./drivers/tty/tty_io.chMhjhhubah}(h]h ]h"]h$]h&]uh1jhjihhhjhMubeh}(h]h ](jOfunctioneh"]h$]h&]jjOjjjjjjjuh1jhhhjJhNhNubj)}(h**Parameters** ``struct tty_struct *tty`` tty being resized ``struct winsize *ws`` new dimensions **Description** Update the termios variables and send the necessary signals to peform a terminal resize correctly.h](h)}(h**Parameters**h]j)}(hjh]h Parameters}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhjubah}(h]h ]h"]h$]h&]uh1hh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:68: ./drivers/tty/tty_io.chMhjubj)}(hhh](j)}(h-``struct tty_struct *tty`` tty being resized h](j)}(h``struct tty_struct *tty``h]j )}(hjh]hstruct tty_struct *tty}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1j hjubah}(h]h ]h"]h$]h&]uh1jh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:68: ./drivers/tty/tty_io.chMhjubj )}(hhh]h)}(htty being resizedh]htty being resized}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhjhMhjubah}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]uh1jhjhMhjubj)}(h&``struct winsize *ws`` new dimensions h](j)}(h``struct winsize *ws``h]j )}(hjh]hstruct winsize *ws}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1j hjubah}(h]h ]h"]h$]h&]uh1jh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:68: ./drivers/tty/tty_io.chMhjubj )}(hhh]h)}(hnew dimensionsh]hnew dimensions}(hj7hhhNhNubah}(h]h ]h"]h$]h&]uh1hhj3hMhj4ubah}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]uh1jhj3hMhjubeh}(h]h ]h"]h$]h&]uh1jhjubh)}(h**Description**h]j)}(hjYh]h Description}(hj[hhhNhNubah}(h]h ]h"]h$]h&]uh1jhjWubah}(h]h ]h"]h$]h&]uh1hh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:68: ./drivers/tty/tty_io.chMhjubh)}(hbUpdate the termios variables and send the necessary signals to peform a terminal resize correctly.h]hbUpdate the termios variables and send the necessary signals to peform a terminal resize correctly.}(hjohhhNhNubah}(h]h ]h"]h$]h&]uh1hh^/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:68: ./drivers/tty/tty_io.chMhjubeh}(h]h ] kernelindentah"]h$]h&]uh1jhjJhhhNhNubeh}(h]jah ]h"]miscah$]h&]uh1hhhhhhhhKBubh)}(hhh](h)}(hTTY Struct Flagsh]hTTY Struct Flags}(hjhhhNhNubah}(h]h ]h"]h$]h&]jj.uh1hhjhhhhhKHubj)}(hhh]h}(h]h ]h"]h$]h&]entries](jtty_struct_flags (C enum)c.tty_struct_flagshNtauh1jhjhhh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:74: ./include/linux/tty.hhNubj)}(hhh](j)}(htty_struct_flagsh]j)}(henum tty_struct_flagsh](j)}(henumh]henum}(hjhhhNhNubah}(h]h ]j%ah"]h$]h&]uh1jhjhhh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:74: ./include/linux/tty.hhKubj)}(h h]h }(hjhhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjhhhjhKubj)}(htty_struct_flagsh]j)}(hjh]htty_struct_flags}(hjhhhNhNubah}(h]h ]jah"]h$]h&]uh1jhjubah}(h]h ](jjeh"]h$]h&]hhuh1jhjhhhjhKubeh}(h]h ]h"]h$]h&]hhjuh1jjjhjhhhjhKubah}(h]jah ](jjeh"]h$]h&]jj)jhuh1jhjhKhjhhubj)}(hhh]h)}(hTTY Struct Flagsh]hTTY Struct Flags}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:74: ./include/linux/tty.hhKhjhhubah}(h]h ]h"]h$]h&]uh1jhjhhhjhKubeh}(h]h ](jOenumeh"]h$]h&]jjOjjjjjjjuh1jhhhjhjhNubj)}(hX**Constants** ``TTY_THROTTLED`` Driver input is throttled. The ldisc should call :c:member:`tty_driver.unthrottle()` in order to resume reception when it is ready to process more data (at threshold min). ``TTY_IO_ERROR`` If set, causes all subsequent userspace read/write calls on the tty to fail, returning -``EIO``. (May be no ldisc too.) ``TTY_OTHER_CLOSED`` Device is a pty and the other side has closed. ``TTY_EXCLUSIVE`` Exclusive open mode (a single opener). ``TTY_DO_WRITE_WAKEUP`` If set, causes the driver to call the :c:member:`tty_ldisc_ops.write_wakeup()` method in order to resume transmission when it can accept more data to transmit. ``TTY_LDISC_OPEN`` Indicates that a line discipline is open. For debugging purposes only. ``TTY_PTY_LOCK`` A flag private to pty code to implement ``TIOCSPTLCK``/``TIOCGPTLCK`` logic. ``TTY_NO_WRITE_SPLIT`` Prevent driver from splitting up writes into smaller chunks (preserve write boundaries to driver). ``TTY_HUPPED`` The TTY was hung up. This is set post :c:member:`tty_driver.hangup()`. ``TTY_HUPPING`` The TTY is in the process of hanging up to abort potential readers. ``TTY_LDISC_CHANGING`` Line discipline for this TTY is being changed. I/O should not block when this is set. Use tty_io_nonblock() to check. ``TTY_LDISC_HALTED`` Line discipline for this TTY was stopped. No work should be queued to this ldisc.h](h)}(h **Constants**h]j)}(hjh]h Constants}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhjubah}(h]h ]h"]h$]h&]uh1hh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:74: ./include/linux/tty.hhMhjubj)}(hhh](j)}(h``TTY_THROTTLED`` Driver input is throttled. The ldisc should call :c:member:`tty_driver.unthrottle()` in order to resume reception when it is ready to process more data (at threshold min). h](j)}(h``TTY_THROTTLED``h]j )}(hj;h]h TTY_THROTTLED}(hj=hhhNhNubah}(h]h ]h"]h$]h&]uh1j hj9ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:74: ./include/linux/tty.hhMhj5ubj )}(hhh]h)}(hDriver input is throttled. The ldisc should call :c:member:`tty_driver.unthrottle()` in order to resume reception when it is ready to process more data (at threshold min).h](h1Driver input is throttled. The ldisc should call }(hjThhhNhNubh)}(h#:c:member:`tty_driver.unthrottle()`h]j )}(hj^h]htty_driver.unthrottle()}(hj`hhhNhNubah}(h]h ](jjOc-membereh"]h$]h&]uh1j hj\ubah}(h]h ]h"]h$]h&]refdocj refdomainjOreftypemember refexplicitrefwarnjUjjtty_driver.unthrottle()uh1hh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:74: ./include/linux/tty.hhMhjTubhW in order to resume reception when it is ready to process more data (at threshold min).}(hjThhhNhNubeh}(h]h ]h"]h$]h&]uh1hhj{hMhjQubah}(h]h ]h"]h$]h&]uh1jhj5ubeh}(h]h ]h"]h$]h&]uh1jhjPhMhj2ubj)}(h``TTY_IO_ERROR`` If set, causes all subsequent userspace read/write calls on the tty to fail, returning -``EIO``. (May be no ldisc too.) h](j)}(h``TTY_IO_ERROR``h]j )}(hjh]h TTY_IO_ERROR}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1j hjubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:74: ./include/linux/tty.hhM hjubj )}(hhh]h)}(hwIf set, causes all subsequent userspace read/write calls on the tty to fail, returning -``EIO``. (May be no ldisc too.)h](hXIf set, causes all subsequent userspace read/write calls on the tty to fail, returning -}(hjhhhNhNubj )}(h``EIO``h]hEIO}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1j hjubh. (May be no ldisc too.)}(hjhhhNhNubeh}(h]h ]h"]h$]h&]uh1hh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:74: ./include/linux/tty.hhM hjubah}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]uh1jhjhM hj2ubj)}(hD``TTY_OTHER_CLOSED`` Device is a pty and the other side has closed. h](j)}(h``TTY_OTHER_CLOSED``h]j )}(hjh]hTTY_OTHER_CLOSED}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1j hjubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:74: ./include/linux/tty.hhMhjubj )}(hhh]h)}(h.Device is a pty and the other side has closed.h]h.Device is a pty and the other side has closed.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhjhMhjubah}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]uh1jhjhMhj2ubj)}(h9``TTY_EXCLUSIVE`` Exclusive open mode (a single opener). h](j)}(h``TTY_EXCLUSIVE``h]j )}(hjh]h TTY_EXCLUSIVE}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1j hjubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:74: ./include/linux/tty.hhMhjubj )}(hhh]h)}(h&Exclusive open mode (a single opener).h]h&Exclusive open mode (a single opener).}(hj6hhhNhNubah}(h]h ]h"]h$]h&]uh1hhj2hMhj3ubah}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]uh1jhj2hMhj2ubj)}(h``TTY_DO_WRITE_WAKEUP`` If set, causes the driver to call the :c:member:`tty_ldisc_ops.write_wakeup()` method in order to resume transmission when it can accept more data to transmit. h](j)}(h``TTY_DO_WRITE_WAKEUP``h]j )}(hjVh]hTTY_DO_WRITE_WAKEUP}(hjXhhhNhNubah}(h]h ]h"]h$]h&]uh1j hjTubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:74: ./include/linux/tty.hhMhjPubj )}(hhh]h)}(hIf set, causes the driver to call the :c:member:`tty_ldisc_ops.write_wakeup()` method in order to resume transmission when it can accept more data to transmit.h](h&If set, causes the driver to call the }(hjohhhNhNubh)}(h(:c:member:`tty_ldisc_ops.write_wakeup()`h]j )}(hjyh]htty_ldisc_ops.write_wakeup()}(hj{hhhNhNubah}(h]h ](jjOc-membereh"]h$]h&]uh1j hjwubah}(h]h ]h"]h$]h&]refdocj refdomainjOreftypemember refexplicitrefwarnjUjjtty_ldisc_ops.write_wakeup()uh1hh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:74: ./include/linux/tty.hhMhjoubhQ method in order to resume transmission when it can accept more data to transmit.}(hjohhhNhNubeh}(h]h ]h"]h$]h&]uh1hhjhMhjlubah}(h]h ]h"]h$]h&]uh1jhjPubeh}(h]h ]h"]h$]h&]uh1jhjkhMhj2ubj)}(hZ``TTY_LDISC_OPEN`` Indicates that a line discipline is open. For debugging purposes only. h](j)}(h``TTY_LDISC_OPEN``h]j )}(hjh]hTTY_LDISC_OPEN}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1j hjubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:74: ./include/linux/tty.hhMhjubj )}(hhh]h)}(hFIndicates that a line discipline is open. For debugging purposes only.h]hFIndicates that a line discipline is open. For debugging purposes only.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhjhMhjubah}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]uh1jhjhMhj2ubj)}(h^``TTY_PTY_LOCK`` A flag private to pty code to implement ``TIOCSPTLCK``/``TIOCGPTLCK`` logic. h](j)}(h``TTY_PTY_LOCK``h]j )}(hjh]h TTY_PTY_LOCK}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1j hjubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:74: ./include/linux/tty.hhMhjubj )}(hhh]h)}(hLA flag private to pty code to implement ``TIOCSPTLCK``/``TIOCGPTLCK`` logic.h](h(A flag private to pty code to implement }(hjhhhNhNubj )}(h``TIOCSPTLCK``h]h TIOCSPTLCK}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1j hjubh/}(hjhhhNhNubj )}(h``TIOCGPTLCK``h]h TIOCGPTLCK}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1j hjubh logic.}(hjhhhNhNubeh}(h]h ]h"]h$]h&]uh1hhjhMhjubah}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]uh1jhjhMhj2ubj)}(hz``TTY_NO_WRITE_SPLIT`` Prevent driver from splitting up writes into smaller chunks (preserve write boundaries to driver). h](j)}(h``TTY_NO_WRITE_SPLIT``h]j )}(hjIh]hTTY_NO_WRITE_SPLIT}(hjKhhhNhNubah}(h]h ]h"]h$]h&]uh1j hjGubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:74: ./include/linux/tty.hhM!hjCubj )}(hhh]h)}(hbPrevent driver from splitting up writes into smaller chunks (preserve write boundaries to driver).h]hbPrevent driver from splitting up writes into smaller chunks (preserve write boundaries to driver).}(hjbhhhNhNubah}(h]h ]h"]h$]h&]uh1hh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:74: ./include/linux/tty.hhM hj_ubah}(h]h ]h"]h$]h&]uh1jhjCubeh}(h]h ]h"]h$]h&]uh1jhj^hM!hj2ubj)}(hV``TTY_HUPPED`` The TTY was hung up. This is set post :c:member:`tty_driver.hangup()`. h](j)}(h``TTY_HUPPED``h]j )}(hjh]h TTY_HUPPED}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1j hjubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:74: ./include/linux/tty.hhM$hj}ubj )}(hhh]h)}(hFThe TTY was hung up. This is set post :c:member:`tty_driver.hangup()`.h](h&The TTY was hung up. This is set post }(hjhhhNhNubh)}(h:c:member:`tty_driver.hangup()`h]j )}(hjh]htty_driver.hangup()}(hjhhhNhNubah}(h]h ](jjOc-membereh"]h$]h&]uh1j hjubah}(h]h ]h"]h$]h&]refdocj refdomainjOreftypemember refexplicitrefwarnjUjjtty_driver.hangup()uh1hhjhM$hjubh.}(hjhhhNhNubeh}(h]h ]h"]h$]h&]uh1hhjhM$hjubah}(h]h ]h"]h$]h&]uh1jhj}ubeh}(h]h ]h"]h$]h&]uh1jhjhM$hj2ubj)}(hT``TTY_HUPPING`` The TTY is in the process of hanging up to abort potential readers. h](j)}(h``TTY_HUPPING``h]j )}(hjh]h TTY_HUPPING}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1j hjubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:74: ./include/linux/tty.hhM'hjubj )}(hhh]h)}(hCThe TTY is in the process of hanging up to abort potential readers.h]hCThe TTY is in the process of hanging up to abort potential readers.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhjhM'hjubah}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]uh1jhjhM'hj2ubj)}(h``TTY_LDISC_CHANGING`` Line discipline for this TTY is being changed. I/O should not block when this is set. Use tty_io_nonblock() to check. h](j)}(h``TTY_LDISC_CHANGING``h]j )}(hjh]hTTY_LDISC_CHANGING}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1j hjubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:74: ./include/linux/tty.hhM+hjubj )}(hhh]h)}(huLine discipline for this TTY is being changed. I/O should not block when this is set. Use tty_io_nonblock() to check.h]huLine discipline for this TTY is being changed. I/O should not block when this is set. Use tty_io_nonblock() to check.}(hj1hhhNhNubah}(h]h ]h"]h$]h&]uh1hh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:74: ./include/linux/tty.hhM*hj.ubah}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]uh1jhj-hM+hj2ubj)}(hf``TTY_LDISC_HALTED`` Line discipline for this TTY was stopped. No work should be queued to this ldisc.h](j)}(h``TTY_LDISC_HALTED``h]j )}(hjRh]hTTY_LDISC_HALTED}(hjThhhNhNubah}(h]h ]h"]h$]h&]uh1j hjPubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:74: ./include/linux/tty.hhM.hjLubj )}(hhh]h)}(hQLine discipline for this TTY was stopped. No work should be queued to this ldisc.h]hQLine discipline for this TTY was stopped. No work should be queued to this ldisc.}(hjkhhhNhNubah}(h]h ]h"]h$]h&]uh1hhjghM.hjhubah}(h]h ]h"]h$]h&]uh1jhjLubeh}(h]h ]h"]h$]h&]uh1jhjghM.hj2ubeh}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ] kernelindentah"]h$]h&]uh1jhjhhhjhNubh)}(h**Description**h]j)}(hjh]h Description}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhjubah}(h]h ]h"]h$]h&]uh1hh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:74: ./include/linux/tty.hhM1hjhhubh)}(h>These bits are used in the :c:member:`tty_struct.flags` field.h](hThese bits are used in the }(hjhhhNhNubh)}(h:c:member:`tty_struct.flags`h]j )}(hjh]htty_struct.flags}(hjhhhNhNubah}(h]h ](jjOc-membereh"]h$]h&]uh1j hjubah}(h]h ]h"]h$]h&]refdocj refdomainjOreftypemember refexplicitrefwarnjUjjtty_struct.flagsuh1hh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:74: ./include/linux/tty.hhMhjubh field.}(hjhhhNhNubeh}(h]h ]h"]h$]h&]uh1hhjhMhjhhubh)}(hSo that interrupts won't be able to mess up the queues, copy_to_cooked must be atomic with respect to itself, as must tty->write. Thus, you must use the inline functions set_bit() and clear_bit() to make things atomic.h]hSo that interrupts won’t be able to mess up the queues, copy_to_cooked must be atomic with respect to itself, as must tty->write. Thus, you must use the inline functions set_bit() and clear_bit() to make things atomic.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:74: ./include/linux/tty.hhMhjhhubeh}(h]j4ah ]h"]tty struct flagsah$]h&]uh1hhhhhhhhKHubh)}(hhh](h)}(hTTY Struct Referenceh]hTTY Struct Reference}(hjhhhNhNubah}(h]h ]h"]h$]h&]jjPuh1hhjhhhhhKNubj)}(hhh]h}(h]h ]h"]h$]h&]entries](jtty_struct (C struct) c.tty_structhNtauh1jhjhhh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhNubj)}(hhh](j)}(h tty_structh]j)}(hstruct tty_structh](j)}(hjh]hstruct}(hj hhhNhNubah}(h]h ]j%ah"]h$]h&]uh1jhj hhh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKubj)}(h h]h }(hj+ hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhj hhhj* hKubj)}(h tty_structh]j)}(hj h]h tty_struct}(hj= hhhNhNubah}(h]h ]jah"]h$]h&]uh1jhj9 ubah}(h]h ](jjeh"]h$]h&]hhuh1jhj hhhj* hKubeh}(h]h ]h"]h$]h&]hhjuh1jjjhj hhhj* hKubah}(h]j ah ](jjeh"]h$]h&]jj)jhuh1jhj* hKhj hhubj)}(hhh]h)}(h&state associated with a tty while openh]h&state associated with a tty while open}(hj_ hhhNhNubah}(h]h ]h"]h$]h&]uh1hh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKzhj\ hhubah}(h]h ]h"]h$]h&]uh1jhj hhhj* hKubeh}(h]h ](jOstructeh"]h$]h&]jjOjjw jjw jjjuh1jhhhjhj hNubj)}(hX)**Definition**:: struct tty_struct { struct kref kref; int index; struct device *dev; struct tty_driver *driver; struct tty_port *port; const struct tty_operations *ops; struct tty_ldisc *ldisc; struct ld_semaphore ldisc_sem; struct mutex atomic_write_lock; struct mutex legacy_mutex; struct mutex throttle_mutex; struct rw_semaphore termios_rwsem; struct mutex winsize_mutex; struct ktermios termios, termios_locked; char name[64]; unsigned long flags; int count; unsigned int receive_room; struct winsize winsize; struct { spinlock_t lock; bool stopped; bool tco_stopped; } flow; struct { struct pid *pgrp; struct pid *session; spinlock_t lock; unsigned char pktstatus; bool packet; } ctrl; bool hw_stopped; bool closing; int flow_change; struct tty_struct *link; struct fasync_struct *fasync; wait_queue_head_t write_wait; wait_queue_head_t read_wait; wait_queue_head_t break_wait; struct work_struct hangup_work; void *disc_data; void *driver_data; spinlock_t files_lock; int write_cnt; u8 *write_buf; struct list_head tty_files; struct work_struct SAK_work; }; **Members** ``kref`` reference counting by tty_kref_get() and tty_kref_put(), reaching zero frees the structure ``index`` index of this tty (e.g. to construct **name** like tty12) ``dev`` class device or ``NULL`` (e.g. ptys, serdev) ``driver`` :c:type:`struct tty_driver ` operating this tty ``port`` persistent storage for this device (i.e. :c:type:`struct tty_port `) ``ops`` :c:type:`struct tty_operations ` of **driver** for this tty (open, close, etc.) ``ldisc`` the current line discipline for this tty (n_tty by default) ``ldisc_sem`` protects line discipline changes (**ldisc**) -- lock tty not pty ``atomic_write_lock`` protects against concurrent writers, i.e. locks **write_cnt**, **write_buf** and similar ``legacy_mutex`` leftover from history (BKL -> BTM -> **legacy_mutex**), protecting several operations on this tty ``throttle_mutex`` protects against concurrent tty_throttle_safe() and tty_unthrottle_safe() (but not tty_unthrottle()) ``termios_rwsem`` protects **termios** and **termios_locked** ``winsize_mutex`` protects **winsize** ``termios`` termios for the current tty, copied from/to **driver.termios** ``termios_locked`` locked termios (by ``TIOCGLCKTRMIOS`` and ``TIOCSLCKTRMIOS`` ioctls) ``name`` name of the tty constructed by tty_line_name() (e.g. ttyS3) ``flags`` bitwise OR of ``TTY_THROTTLED``, ``TTY_IO_ERROR``, ... ``count`` count of open processes, reaching zero cancels all the work for this tty and drops a **kref** too (but does not free this tty) ``receive_room`` bytes permitted to feed to **ldisc** without any being lost ``winsize`` size of the terminal "window" (cf. **winsize_mutex**) ``flow`` flow settings grouped together ``flow.lock`` lock for **flow** members ``flow.stopped`` tty stopped/started by stop_tty()/start_tty() ``flow.tco_stopped`` tty stopped/started by ``TCOOFF``/``TCOON`` ioctls (it has precedence over **flow.stopped**) ``ctrl`` control settings grouped together ``ctrl.pgrp`` process group of this tty (setpgrp(2)) ``ctrl.session`` session of this tty (setsid(2)). Writes are protected by both **ctrl.lock** and **legacy_mutex**, readers must use at least one of them. ``ctrl.lock`` lock for **ctrl** members ``ctrl.pktstatus`` packet mode status (bitwise OR of ``TIOCPKT_`` constants) ``ctrl.packet`` packet mode enabled ``hw_stopped`` not controlled by the tty layer, under **driver**'s control for CTS handling ``closing`` when set during close, n_tty processes only START & STOP chars ``flow_change`` controls behavior of throttling, see tty_throttle_safe() and tty_unthrottle_safe() ``link`` link to another pty (master -> slave and vice versa) ``fasync`` state for ``O_ASYNC`` (for ``SIGIO``); managed by fasync_helper() ``write_wait`` concurrent writers are waiting in this queue until they are allowed to write ``read_wait`` readers wait for data in this queue ``break_wait`` wait queue for timed breaks ``hangup_work`` normally a work to perform a hangup (do_tty_hangup()); while freeing the tty, (re)used to release_one_tty() ``disc_data`` pointer to **ldisc**'s private data (e.g. to :c:type:`struct n_tty_data `) ``driver_data`` pointer to **driver**'s private data (e.g. :c:type:`struct uart_state `) ``files_lock`` protects **tty_files** list ``write_cnt`` count of bytes written in tty_write() to **write_buf** ``write_buf`` temporary buffer used during tty_write() to copy user data to ``tty_files`` list of (re)openers of this tty (i.e. linked :c:type:`struct tty_file_private `) ``SAK_work`` if the tty has a pending do_SAK, it is queued hereh](h)}(h**Definition**::h](j)}(h**Definition**h]h Definition}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1jhj ubh:}(hj hhhNhNubeh}(h]h ]h"]h$]h&]uh1hh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhK~hj{ ubh literal_block)}(hXstruct tty_struct { struct kref kref; int index; struct device *dev; struct tty_driver *driver; struct tty_port *port; const struct tty_operations *ops; struct tty_ldisc *ldisc; struct ld_semaphore ldisc_sem; struct mutex atomic_write_lock; struct mutex legacy_mutex; struct mutex throttle_mutex; struct rw_semaphore termios_rwsem; struct mutex winsize_mutex; struct ktermios termios, termios_locked; char name[64]; unsigned long flags; int count; unsigned int receive_room; struct winsize winsize; struct { spinlock_t lock; bool stopped; bool tco_stopped; } flow; struct { struct pid *pgrp; struct pid *session; spinlock_t lock; unsigned char pktstatus; bool packet; } ctrl; bool hw_stopped; bool closing; int flow_change; struct tty_struct *link; struct fasync_struct *fasync; wait_queue_head_t write_wait; wait_queue_head_t read_wait; wait_queue_head_t break_wait; struct work_struct hangup_work; void *disc_data; void *driver_data; spinlock_t files_lock; int write_cnt; u8 *write_buf; struct list_head tty_files; struct work_struct SAK_work; };h]hXstruct tty_struct { struct kref kref; int index; struct device *dev; struct tty_driver *driver; struct tty_port *port; const struct tty_operations *ops; struct tty_ldisc *ldisc; struct ld_semaphore ldisc_sem; struct mutex atomic_write_lock; struct mutex legacy_mutex; struct mutex throttle_mutex; struct rw_semaphore termios_rwsem; struct mutex winsize_mutex; struct ktermios termios, termios_locked; char name[64]; unsigned long flags; int count; unsigned int receive_room; struct winsize winsize; struct { spinlock_t lock; bool stopped; bool tco_stopped; } flow; struct { struct pid *pgrp; struct pid *session; spinlock_t lock; unsigned char pktstatus; bool packet; } ctrl; bool hw_stopped; bool closing; int flow_change; struct tty_struct *link; struct fasync_struct *fasync; wait_queue_head_t write_wait; wait_queue_head_t read_wait; wait_queue_head_t break_wait; struct work_struct hangup_work; void *disc_data; void *driver_data; spinlock_t files_lock; int write_cnt; u8 *write_buf; struct list_head tty_files; struct work_struct SAK_work; };}hj sbah}(h]h ]h"]h$]h&]hhuh1j h]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhj{ ubh)}(h **Members**h]j)}(hj h]hMembers}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1jhj ubah}(h]h ]h"]h$]h&]uh1hh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhj{ ubj)}(hhh](j)}(hd``kref`` reference counting by tty_kref_get() and tty_kref_put(), reaching zero frees the structure h](j)}(h``kref``h]j )}(hj h]hkref}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1j hj ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhK~hj ubj )}(hhh]h)}(hZreference counting by tty_kref_get() and tty_kref_put(), reaching zero frees the structureh]hZreference counting by tty_kref_get() and tty_kref_put(), reaching zero frees the structure}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhK}hj ubah}(h]h ]h"]h$]h&]uh1jhj ubeh}(h]h ]h"]h$]h&]uh1jhj hK~hj ubj)}(hD``index`` index of this tty (e.g. to construct **name** like tty12) h](j)}(h ``index``h]j )}(hj!h]hindex}(hj !hhhNhNubah}(h]h ]h"]h$]h&]uh1j hj!ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhj!ubj )}(hhh]h)}(h9index of this tty (e.g. to construct **name** like tty12)h](h%index of this tty (e.g. to construct }(hj!!hhhNhNubj)}(h**name**h]hname}(hj)!hhhNhNubah}(h]h ]h"]h$]h&]uh1jhj!!ubh like tty12)}(hj!!hhhNhNubeh}(h]h ]h"]h$]h&]uh1hhj!hKhj!ubah}(h]h ]h"]h$]h&]uh1jhj!ubeh}(h]h ]h"]h$]h&]uh1jhj!hKhj ubj)}(h5``dev`` class device or ``NULL`` (e.g. ptys, serdev) h](j)}(h``dev``h]j )}(hjS!h]hdev}(hjU!hhhNhNubah}(h]h ]h"]h$]h&]uh1j hjQ!ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhjM!ubj )}(hhh]h)}(h,class device or ``NULL`` (e.g. ptys, serdev)h](hclass device or }(hjl!hhhNhNubj )}(h``NULL``h]hNULL}(hjt!hhhNhNubah}(h]h ]h"]h$]h&]uh1j hjl!ubh (e.g. ptys, serdev)}(hjl!hhhNhNubeh}(h]h ]h"]h$]h&]uh1hhjh!hKhji!ubah}(h]h ]h"]h$]h&]uh1jhjM!ubeh}(h]h ]h"]h$]h&]uh1jhjh!hKhj ubj)}(hG``driver`` :c:type:`struct tty_driver ` operating this tty h](j)}(h ``driver``h]j )}(hj!h]hdriver}(hj!hhhNhNubah}(h]h ]h"]h$]h&]uh1j hj!ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhj!ubj )}(hhh]h)}(h;:c:type:`struct tty_driver ` operating this ttyh](h)}(h(:c:type:`struct tty_driver `h]j )}(hj!h]hstruct tty_driver}(hj!hhhNhNubah}(h]h ](jjOc-typeeh"]h$]h&]uh1j hj!ubah}(h]h ]h"]h$]h&]refdocj refdomainjOreftypetype refexplicitrefwarnjUjj tty_driveruh1hhj!hKhj!ubh operating this tty}(hj!hhhNhNubeh}(h]h ]h"]h$]h&]uh1hhj!hKhj!ubah}(h]h ]h"]h$]h&]uh1jhj!ubeh}(h]h ]h"]h$]h&]uh1jhj!hKhj ubj)}(hX``port`` persistent storage for this device (i.e. :c:type:`struct tty_port `) h](j)}(h``port``h]j )}(hj!h]hport}(hj!hhhNhNubah}(h]h ]h"]h$]h&]uh1j hj!ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhj!ubj )}(hhh]h)}(hNpersistent storage for this device (i.e. :c:type:`struct tty_port `)h](h)persistent storage for this device (i.e. }(hj"hhhNhNubh)}(h$:c:type:`struct tty_port `h]j )}(hj"h]hstruct tty_port}(hj"hhhNhNubah}(h]h ](jjOc-typeeh"]h$]h&]uh1j hj"ubah}(h]h ]h"]h$]h&]refdocj refdomainjOreftypetype refexplicitrefwarnjUjjtty_portuh1hhj "hKhj"ubh)}(hj"hhhNhNubeh}(h]h ]h"]h$]h&]uh1hhj "hKhj "ubah}(h]h ]h"]h$]h&]uh1jhj!ubeh}(h]h ]h"]h$]h&]uh1jhj "hKhj ubj)}(hh``ops`` :c:type:`struct tty_operations ` of **driver** for this tty (open, close, etc.) h](j)}(h``ops``h]j )}(hjR"h]hops}(hjT"hhhNhNubah}(h]h ]h"]h$]h&]uh1j hjP"ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhjL"ubj )}(hhh]h)}(h_:c:type:`struct tty_operations ` of **driver** for this tty (open, close, etc.)h](h)}(h0:c:type:`struct tty_operations `h]j )}(hjq"h]hstruct tty_operations}(hjs"hhhNhNubah}(h]h ](jjOc-typeeh"]h$]h&]uh1j hjo"ubah}(h]h ]h"]h$]h&]refdocj refdomainjOreftypetype refexplicitrefwarnjUjjtty_operationsuh1hhjg"hKhjk"ubh of }(hjk"hhhNhNubj)}(h **driver**h]hdriver}(hj"hhhNhNubah}(h]h ]h"]h$]h&]uh1jhjk"ubh! for this tty (open, close, etc.)}(hjk"hhhNhNubeh}(h]h ]h"]h$]h&]uh1hhjg"hKhjh"ubah}(h]h ]h"]h$]h&]uh1jhjL"ubeh}(h]h ]h"]h$]h&]uh1jhjg"hKhj ubj)}(hF``ldisc`` the current line discipline for this tty (n_tty by default) h](j)}(h ``ldisc``h]j )}(hj"h]hldisc}(hj"hhhNhNubah}(h]h ]h"]h$]h&]uh1j hj"ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhj"ubj )}(hhh]h)}(h;the current line discipline for this tty (n_tty by default)h]h;the current line discipline for this tty (n_tty by default)}(hj"hhhNhNubah}(h]h ]h"]h$]h&]uh1hhj"hKhj"ubah}(h]h ]h"]h$]h&]uh1jhj"ubeh}(h]h ]h"]h$]h&]uh1jhj"hKhj ubj)}(hO``ldisc_sem`` protects line discipline changes (**ldisc**) -- lock tty not pty h](j)}(h ``ldisc_sem``h]j )}(hj"h]h ldisc_sem}(hj"hhhNhNubah}(h]h ]h"]h$]h&]uh1j hj"ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhj"ubj )}(hhh]h)}(h@protects line discipline changes (**ldisc**) -- lock tty not ptyh](h"protects line discipline changes (}(hj#hhhNhNubj)}(h **ldisc**h]hldisc}(hj#hhhNhNubah}(h]h ]h"]h$]h&]uh1jhj#ubh) -- lock tty not pty}(hj#hhhNhNubeh}(h]h ]h"]h$]h&]uh1hhj #hKhj #ubah}(h]h ]h"]h$]h&]uh1jhj"ubeh}(h]h ]h"]h$]h&]uh1jhj #hKhj ubj)}(ho``atomic_write_lock`` protects against concurrent writers, i.e. locks **write_cnt**, **write_buf** and similar h](j)}(h``atomic_write_lock``h]j )}(hj@#h]hatomic_write_lock}(hjB#hhhNhNubah}(h]h ]h"]h$]h&]uh1j hj>#ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhj:#ubj )}(hhh]h)}(hXprotects against concurrent writers, i.e. locks **write_cnt**, **write_buf** and similarh](h0protects against concurrent writers, i.e. locks 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protects **termios** and **termios_locked** h](j)}(h``termios_rwsem``h]j )}(hj$$h]h termios_rwsem}(hj&$hhhNhNubah}(h]h ]h"]h$]h&]uh1j hj"$ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhj$ubj )}(hhh]h)}(h+protects **termios** and **termios_locked**h](h protects }(hj=$hhhNhNubj)}(h **termios**h]htermios}(hjE$hhhNhNubah}(h]h ]h"]h$]h&]uh1jhj=$ubh and }(hj=$hhhNhNubj)}(h**termios_locked**h]htermios_locked}(hjW$hhhNhNubah}(h]h ]h"]h$]h&]uh1jhj=$ubeh}(h]h ]h"]h$]h&]uh1hhj9$hKhj:$ubah}(h]h ]h"]h$]h&]uh1jhj$ubeh}(h]h ]h"]h$]h&]uh1jhj9$hKhj ubj)}(h'``winsize_mutex`` protects **winsize** h](j)}(h``winsize_mutex``h]j )}(hj}$h]h winsize_mutex}(hj$hhhNhNubah}(h]h ]h"]h$]h&]uh1j hj{$ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhjw$ubj )}(hhh]h)}(hprotects **winsize**h](h protects }(hj$hhhNhNubj)}(h **winsize**h]hwinsize}(hj$hhhNhNubah}(h]h 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over }(hj'hhhNhNubj)}(h**flow.stopped**h]h flow.stopped}(hj'hhhNhNubah}(h]h ]h"]h$]h&]uh1jhj'ubh)}(hj'hhhNhNubeh}(h]h ]h"]h$]h&]uh1hh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhj'ubah}(h]h ]h"]h$]h&]uh1jhj'ubeh}(h]h ]h"]h$]h&]uh1jhj'hKhj ubj)}(h+``ctrl`` control settings grouped together h](j)}(h``ctrl``h]j )}(hj(h]hctrl}(hj(hhhNhNubah}(h]h ]h"]h$]h&]uh1j hj (ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhj(ubj )}(hhh]h)}(h!control settings grouped togetherh]h!control settings grouped together}(hj'(hhhNhNubah}(h]h ]h"]h$]h&]uh1hhj#(hKhj$(ubah}(h]h ]h"]h$]h&]uh1jhj(ubeh}(h]h ]h"]h$]h&]uh1jhj#(hKhj ubj)}(h5``ctrl.pgrp`` process group of this tty (setpgrp(2)) h](j)}(h ``ctrl.pgrp``h]j )}(hjG(h]h ctrl.pgrp}(hjI(hhhNhNubah}(h]h ]h"]h$]h&]uh1j hjE(ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhjA(ubj )}(hhh]h)}(h&process group of this tty (setpgrp(2))h]h&process group of this tty (setpgrp(2))}(hj`(hhhNhNubah}(h]h ]h"]h$]h&]uh1hhj\(hKhj](ubah}(h]h ]h"]h$]h&]uh1jhjA(ubeh}(h]h ]h"]h$]h&]uh1jhj\(hKhj ubj)}(h``ctrl.session`` session of this tty (setsid(2)). Writes are protected by both **ctrl.lock** and **legacy_mutex**, readers must use at least one of them. h](j)}(h``ctrl.session``h]j )}(hj(h]h ctrl.session}(hj(hhhNhNubah}(h]h ]h"]h$]h&]uh1j hj~(ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhjz(ubj )}(hhh]h)}(hsession of this tty (setsid(2)). Writes are protected by both **ctrl.lock** and **legacy_mutex**, readers must use at least one of them.h](h>session of this tty (setsid(2)). Writes are protected by both }(hj(hhhNhNubj)}(h **ctrl.lock**h]h ctrl.lock}(hj(hhhNhNubah}(h]h ]h"]h$]h&]uh1jhj(ubh and }(hj(hhhNhNubj)}(h**legacy_mutex**h]h legacy_mutex}(hj(hhhNhNubah}(h]h ]h"]h$]h&]uh1jhj(ubh(, readers must use at least one of them.}(hj(hhhNhNubeh}(h]h ]h"]h$]h&]uh1hh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhj(ubah}(h]h ]h"]h$]h&]uh1jhjz(ubeh}(h]h ]h"]h$]h&]uh1jhj(hKhj ubj)}(h(``ctrl.lock`` lock for **ctrl** members h](j)}(h ``ctrl.lock``h]j )}(hj(h]h ctrl.lock}(hj(hhhNhNubah}(h]h ]h"]h$]h&]uh1j hj(ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhj(ubj )}(hhh]h)}(hlock for **ctrl** membersh](h lock for }(hj(hhhNhNubj)}(h**ctrl**h]hctrl}(hj(hhhNhNubah}(h]h ]h"]h$]h&]uh1jhj(ubh members}(hj(hhhNhNubeh}(h]h ]h"]h$]h&]uh1hhj(hKhj(ubah}(h]h ]h"]h$]h&]uh1jhj(ubeh}(h]h ]h"]h$]h&]uh1jhj(hKhj ubj)}(hM``ctrl.pktstatus`` packet mode status (bitwise OR of ``TIOCPKT_`` constants) Lh](j)}(h``ctrl.pktstatus``h]j )}(hj))h]hctrl.pktstatus}(hj+)hhhNhNubah}(h]h ]h"]h$]h&]uh1j hj')ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhj#)ubj )}(hhh]h)}(h9packet mode status (bitwise OR of ``TIOCPKT_`` constants)h](h"packet mode status (bitwise OR of }(hjB)hhhNhNubj )}(h ``TIOCPKT_``h]hTIOCPKT_}(hjJ)hhhNhNubah}(h]h ]h"]h$]h&]uh1j hjB)ubh constants)}(hjB)hhhNhNubeh}(h]h ]h"]h$]h&]uh1hhj>)hKhj?)ubah}(h]h ]h"]h$]h&]uh1jhj#)ubeh}(h]h ]h"]h$]h&]uh1jhj>)hKhj ubj)}(h$``ctrl.packet`` packet mode enabled h](j)}(h``ctrl.packet``h]j )}(hjt)h]h ctrl.packet}(hjv)hhhNhNubah}(h]h ]h"]h$]h&]uh1j hjr)ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhjn)ubj )}(hhh]h)}(hpacket mode enabledh]hpacket mode enabled}(hj)hhhNhNubah}(h]h ]h"]h$]h&]uh1hhj)hKhj)ubah}(h]h ]h"]h$]h&]uh1jhjn)ubeh}(h]h ]h"]h$]h&]uh1jhj)hKhj ubj)}(h\``hw_stopped`` not controlled by the tty layer, under **driver**'s control for CTS handling h](j)}(h``hw_stopped``h]j )}(hj)h]h hw_stopped}(hj)hhhNhNubah}(h]h ]h"]h$]h&]uh1j hj)ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhj)ubj )}(hhh]h)}(hLnot controlled by the tty layer, under **driver**'s control for CTS handlingh](h'not controlled by the tty layer, under }(hj)hhhNhNubj)}(h **driver**h]hdriver}(hj)hhhNhNubah}(h]h ]h"]h$]h&]uh1jhj)ubh’s control for CTS handling}(hj)hhhNhNubeh}(h]h ]h"]h$]h&]uh1hh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhj)ubah}(h]h ]h"]h$]h&]uh1jhj)ubeh}(h]h ]h"]h$]h&]uh1jhj)hKhj ubj)}(hK``closing`` when set during close, n_tty processes only START & STOP chars h](j)}(h ``closing``h]j )}(hj)h]hclosing}(hj)hhhNhNubah}(h]h ]h"]h$]h&]uh1j hj)ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhj)ubj )}(hhh]h)}(h>when set during close, n_tty processes only START & STOP charsh]h>when set during close, n_tty processes only START & STOP chars}(hj*hhhNhNubah}(h]h ]h"]h$]h&]uh1hhj*hKhj*ubah}(h]h ]h"]h$]h&]uh1jhj)ubeh}(h]h ]h"]h$]h&]uh1jhj*hKhj ubj)}(hc``flow_change`` controls behavior of throttling, see tty_throttle_safe() and tty_unthrottle_safe() h](j)}(h``flow_change``h]j )}(hj2*h]h flow_change}(hj4*hhhNhNubah}(h]h ]h"]h$]h&]uh1j hj0*ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhj,*ubj )}(hhh]h)}(hRcontrols behavior of throttling, see tty_throttle_safe() and tty_unthrottle_safe()h]hRcontrols behavior of throttling, see tty_throttle_safe() and tty_unthrottle_safe()}(hjK*hhhNhNubah}(h]h ]h"]h$]h&]uh1hh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhjH*ubah}(h]h ]h"]h$]h&]uh1jhj,*ubeh}(h]h ]h"]h$]h&]uh1jhjG*hKhj ubj)}(h>``link`` link to another pty (master -> slave and vice versa) h](j)}(h``link``h]j )}(hjl*h]hlink}(hjn*hhhNhNubah}(h]h ]h"]h$]h&]uh1j hjj*ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhjf*ubj )}(hhh]h)}(h4link to another pty (master -> slave and vice versa)h]h4link to another pty (master -> slave and vice versa)}(hj*hhhNhNubah}(h]h ]h"]h$]h&]uh1hhj*hKhj*ubah}(h]h ]h"]h$]h&]uh1jhjf*ubeh}(h]h ]h"]h$]h&]uh1jhj*hKhj ubj)}(hM``fasync`` state for ``O_ASYNC`` (for ``SIGIO``); managed by fasync_helper() h](j)}(h ``fasync``h]j )}(hj*h]hfasync}(hj*hhhNhNubah}(h]h ]h"]h$]h&]uh1j hj*ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhj*ubj )}(hhh]h)}(hAstate for ``O_ASYNC`` (for ``SIGIO``); managed by fasync_helper()h](h state for }(hj*hhhNhNubj )}(h ``O_ASYNC``h]hO_ASYNC}(hj*hhhNhNubah}(h]h ]h"]h$]h&]uh1j hj*ubh (for }(hj*hhhNhNubj )}(h ``SIGIO``h]hSIGIO}(hj*hhhNhNubah}(h]h ]h"]h$]h&]uh1j hj*ubh); managed by fasync_helper()}(hj*hhhNhNubeh}(h]h ]h"]h$]h&]uh1hhj*hKhj*ubah}(h]h ]h"]h$]h&]uh1jhj*ubeh}(h]h ]h"]h$]h&]uh1jhj*hKhj ubj)}(h\``write_wait`` concurrent writers are waiting in this queue until they are allowed to write h](j)}(h``write_wait``h]j )}(hj+h]h write_wait}(hj+hhhNhNubah}(h]h ]h"]h$]h&]uh1j hj+ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhj*ubj )}(hhh]h)}(hLconcurrent writers are waiting in this queue until they are allowed to writeh]hLconcurrent writers are waiting in this queue until they are allowed to write}(hj+hhhNhNubah}(h]h ]h"]h$]h&]uh1hh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhj+ubah}(h]h ]h"]h$]h&]uh1jhj*ubeh}(h]h ]h"]h$]h&]uh1jhj+hKhj ubj)}(h2``read_wait`` readers wait for data in this queue h](j)}(h ``read_wait``h]j )}(hj<+h]h read_wait}(hj>+hhhNhNubah}(h]h ]h"]h$]h&]uh1j hj:+ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhj6+ubj )}(hhh]h)}(h#readers wait for data in this queueh]h#readers wait for data in this queue}(hjU+hhhNhNubah}(h]h ]h"]h$]h&]uh1hhjQ+hKhjR+ubah}(h]h ]h"]h$]h&]uh1jhj6+ubeh}(h]h ]h"]h$]h&]uh1jhjQ+hKhj ubj)}(h+``break_wait`` wait queue for timed breaks h](j)}(h``break_wait``h]j )}(hju+h]h break_wait}(hjw+hhhNhNubah}(h]h ]h"]h$]h&]uh1j hjs+ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhjo+ubj )}(hhh]h)}(hwait queue for timed breaksh]hwait queue for timed breaks}(hj+hhhNhNubah}(h]h ]h"]h$]h&]uh1hhj+hKhj+ubah}(h]h ]h"]h$]h&]uh1jhjo+ubeh}(h]h ]h"]h$]h&]uh1jhj+hKhj ubj)}(h|``hangup_work`` normally a work to perform a hangup (do_tty_hangup()); while freeing the tty, (re)used to release_one_tty() h](j)}(h``hangup_work``h]j )}(hj+h]h hangup_work}(hj+hhhNhNubah}(h]h ]h"]h$]h&]uh1j hj+ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhj+ubj )}(hhh]h)}(hknormally a work to perform a hangup (do_tty_hangup()); while freeing the tty, (re)used to release_one_tty()h]hknormally a work to perform a hangup (do_tty_hangup()); while freeing the tty, (re)used to release_one_tty()}(hj+hhhNhNubah}(h]h ]h"]h$]h&]uh1hh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhj+ubah}(h]h ]h"]h$]h&]uh1jhj+ubeh}(h]h ]h"]h$]h&]uh1jhj+hKhj ubj)}(he``disc_data`` pointer to **ldisc**'s private data (e.g. to :c:type:`struct n_tty_data `) h](j)}(h ``disc_data``h]j )}(hj+h]h disc_data}(hj+hhhNhNubah}(h]h ]h"]h$]h&]uh1j hj+ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhj+ubj )}(hhh]h)}(hVpointer to **ldisc**'s private data (e.g. to :c:type:`struct n_tty_data `)h](h pointer to }(hj,hhhNhNubj)}(h **ldisc**h]hldisc}(hj ,hhhNhNubah}(h]h ]h"]h$]h&]uh1jhj,ubh’s private data (e.g. to }(hj,hhhNhNubh)}(h(:c:type:`struct n_tty_data `h]j )}(hj,h]hstruct n_tty_data}(hj,hhhNhNubah}(h]h ](jjOc-typeeh"]h$]h&]uh1j hj,ubah}(h]h ]h"]h$]h&]refdocj refdomainjOreftypetype refexplicitrefwarnjUjj n_tty_datauh1hhj+hKhj,ubh)}(hj,hhhNhNubeh}(h]h ]h"]h$]h&]uh1hhj+hKhj+ubah}(h]h ]h"]h$]h&]uh1jhj+ubeh}(h]h ]h"]h$]h&]uh1jhj+hKhj ubj)}(he``driver_data`` pointer to **driver**'s private data (e.g. :c:type:`struct uart_state `) h](j)}(h``driver_data``h]j )}(hjV,h]h driver_data}(hjX,hhhNhNubah}(h]h ]h"]h$]h&]uh1j hjT,ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhjP,ubj )}(hhh]h)}(hTpointer to **driver**'s private data (e.g. :c:type:`struct uart_state `)h](h pointer to }(hjo,hhhNhNubj)}(h **driver**h]hdriver}(hjw,hhhNhNubah}(h]h ]h"]h$]h&]uh1jhjo,ubh’s private data 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]h"]h$]h&]uh1j hj -ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhj -ubj )}(hhh]h)}(h6count of bytes written in tty_write() to **write_buf**h](h)count of bytes written in tty_write() to }(hj(-hhhNhNubj)}(h **write_buf**h]h write_buf}(hj0-hhhNhNubah}(h]h ]h"]h$]h&]uh1jhj(-ubeh}(h]h ]h"]h$]h&]uh1hhj$-hKhj%-ubah}(h]h ]h"]h$]h&]uh1jhj -ubeh}(h]h ]h"]h$]h&]uh1jhj$-hKhj ubj)}(hL``write_buf`` temporary buffer used during tty_write() to copy user data to h](j)}(h ``write_buf``h]j )}(hjV-h]h write_buf}(hjX-hhhNhNubah}(h]h ]h"]h$]h&]uh1j hjT-ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhjP-ubj )}(hhh]h)}(h=temporary buffer used during tty_write() to copy user data toh]h=temporary buffer used during tty_write() to copy user data to}(hjo-hhhNhNubah}(h]h ]h"]h$]h&]uh1hhjk-hKhjl-ubah}(h]h ]h"]h$]h&]uh1jhjP-ubeh}(h]h ]h"]h$]h&]uh1jhjk-hKhj ubj)}(hq``tty_files`` list of (re)openers of this tty (i.e. linked :c:type:`struct tty_file_private `) h](j)}(h ``tty_files``h]j )}(hj-h]h tty_files}(hj-hhhNhNubah}(h]h ]h"]h$]h&]uh1j hj-ubah}(h]h ]h"]h$]h&]uh1jh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhj-ubj )}(hhh]h)}(hblist of (re)openers of this tty (i.e. linked :c:type:`struct tty_file_private `)h](h-list of (re)openers of this tty (i.e. linked }(hj-hhhNhNubh)}(h4:c:type:`struct tty_file_private `h]j )}(hj-h]hstruct tty_file_private}(hj-hhhNhNubah}(h]h ](jjOc-typeeh"]h$]h&]uh1j hj-ubah}(h]h ]h"]h$]h&]refdocj refdomainjOreftypetype refexplicitrefwarnjUjjtty_file_privateuh1hh]/var/lib/git/docbuild/linux/Documentation/driver-api/tty/tty_struct:80: ./include/linux/tty.hhKhj-ubh)}(hj-hhhNhNubeh}(h]h ]h"]h$]h&]uh1hhj-hKhj-ubah}(h]h ]h"]h$]h&]uh1jhj-ubeh}(h]h ]h"]h$]h&]uh1jhj-hKhj ubj)}(h?``SAK_work`` if the tty has a pending do_SAK, it is queued hereh](j)}(h ``SAK_work``h]j 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