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none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1753786931; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=/WAy7ZfzAdZfOYDos9+uJhuz1NfdLzQ8HaGXK/lMiv8=; b=b3IPhDpZRxeJ4ADKWQrfkc9dYhovK21eCxTxlY8tIdk3b2goR6JHlT6jFk4ReCCO4qW6M/ 98RMozv/bhOCsV2bnWiJ0DlhBD2ENV8t/7HFsHomfaewp5USTakR3MItos58SH4dfju2wj 250KK5JAmG5FC7UApLq4GOGA+zpWc0U= From: Juergen Gross To: xen-devel@lists.xenproject.org Cc: Juergen Gross , Julien Grall , Anthony PERARD , Jason Andryuk Subject: [PATCH v2 4/9] xenstored: don't use xenevtchn_fdopen() in stubdom Date: Tue, 29 Jul 2025 13:01:40 +0200 Message-ID: <20250729110146.10580-5-jgross@suse.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250729110146.10580-1-jgross@suse.com> References: <20250729110146.10580-1-jgross@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Spamd-Result: default: False [-2.80 / 50.00]; BAYES_HAM(-3.00)[100.00%]; NEURAL_HAM_LONG(-1.00)[-1.000]; MID_CONTAINS_FROM(1.00)[]; R_MISSING_CHARSET(0.50)[]; NEURAL_HAM_SHORT(-0.20)[-0.999]; MIME_GOOD(-0.10)[text/plain]; TO_MATCH_ENVRCPT_ALL(0.00)[]; FROM_HAS_DN(0.00)[]; ARC_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; TO_DN_SOME(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.com:mid,suse.com:email,imap1.dmz-prg2.suse.org:helo]; RCVD_VIA_SMTP_AUTH(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; FUZZY_RATELIMITED(0.00)[rspamd.com]; DKIM_SIGNED(0.00)[suse.com:s=susede1]; RCPT_COUNT_FIVE(0.00)[5]; RCVD_TLS_ALL(0.00)[] X-Spam-Flag: NO X-Spam-Level: X-Spam-Score: -2.80 X-ZohoMail-DKIM: pass (identity @suse.com) (identity @suse.com) X-ZM-MESSAGEID: 1753786947890116600 Content-Type: text/plain; charset="utf-8" When running in a stubdom environment xenevtchn_fdopen() won't work, as any file descriptor state is lost across kexec(). Use a wrapper to replace the call of xenevtchn_fdopen() with the really needed xenevtchn_open() when running on top of Mini-OS. Signed-off-by: Juergen Gross Reviewed-by: Jason Andryuk --- tools/xenstored/core.h | 3 +++ tools/xenstored/domain.c | 2 +- tools/xenstored/minios.c | 5 +++++ tools/xenstored/posix.c | 5 +++++ 4 files changed, 14 insertions(+), 1 deletion(-) diff --git a/tools/xenstored/core.h b/tools/xenstored/core.h index 1ba9592d16..bef24a688c 100644 --- a/tools/xenstored/core.h +++ b/tools/xenstored/core.h @@ -29,6 +29,7 @@ #include #include #include +#include =20 #include "xenstore_lib.h" #include "xenstore_state.h" @@ -405,6 +406,8 @@ void handle_special_fds(void); int get_socket_fd(void); void set_socket_fd(int fd); =20 +xenevtchn_handle *evtchn_fdopen(int fd); + #ifdef __MINIOS__ void mount_9pfs(void); #endif diff --git a/tools/xenstored/domain.c b/tools/xenstored/domain.c index 2362216a7a..6767d29a19 100644 --- a/tools/xenstored/domain.c +++ b/tools/xenstored/domain.c @@ -1396,7 +1396,7 @@ void domain_init(int evtfd) if (evtfd < 0) xce_handle =3D xenevtchn_open(NULL, XENEVTCHN_NO_CLOEXEC); else - xce_handle =3D xenevtchn_fdopen(NULL, evtfd, 0); + xce_handle =3D evtchn_fdopen(evtfd); =20 if (xce_handle =3D=3D NULL) barf_perror("Failed to open evtchn device"); diff --git a/tools/xenstored/minios.c b/tools/xenstored/minios.c index a229954cf4..aa1f03fd6b 100644 --- a/tools/xenstored/minios.c +++ b/tools/xenstored/minios.c @@ -85,6 +85,11 @@ void set_socket_fd(int fd) { } =20 +xenevtchn_handle *evtchn_fdopen(int fd) +{ + return xenevtchn_open(NULL, XENEVTCHN_NO_CLOEXEC); +} + static void mount_thread(void *p) { xenbus_event_queue events =3D NULL; diff --git a/tools/xenstored/posix.c b/tools/xenstored/posix.c index 6037d739d0..ebdec82215 100644 --- a/tools/xenstored/posix.c +++ b/tools/xenstored/posix.c @@ -408,6 +408,11 @@ void set_socket_fd(int fd) sock =3D fd; } =20 +xenevtchn_handle *evtchn_fdopen(int fd) +{ + return xenevtchn_fdopen(NULL, fd, 0); +} + const char *xenstore_rundir(void) { return xenstore_daemon_rundir(); --=20 2.43.0