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Wed, 27 Nov 2019 11:52:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1574855557; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=dVNGbdRBc0EVBd/bdcS5Tn0A4DUqVuXwxGbVsrJRq2M=; b=aGPW5yKyVcx3tBAFwrk424nqhieMR/qfVRvJm7WatOvnRBmBnlkF6DgKjzmSOJdHoEK4X6 CHk73h2BVG0ZKfwR4DvE+rrr1LW69Z63vWpaOrQnIdlB/Ho7ML6/WJi4bfLiupDiqq7T3S eys/+wrILgBj9NmAsrSjhUQPkasizjE= From: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= To: qemu-devel@nongnu.org Subject: [PATCH 2/7] ppm-save: pass opened fd Date: Wed, 27 Nov 2019 15:51:57 +0400 Message-Id: <20191127115202.375107-3-marcandre.lureau@redhat.com> In-Reply-To: <20191127115202.375107-1-marcandre.lureau@redhat.com> References: <20191127115202.375107-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-MC-Unique: zJXo-k-2NhO3Ab6HZ2GxMw-1 X-Mimecast-Spam-Score: 0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 207.211.31.120 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Paolo Bonzini , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , Eduardo Habkost , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Gerd Hoffmann Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" This will allow to pre-open the file before running the async finish handler and avoid potential monitor fdset races. (note: this is preliminary work for asynchronous screendump support) Signed-off-by: Marc-Andr=C3=A9 Lureau Reviewed-by: Daniel P. Berrang=C3=A9 --- ui/console.c | 45 ++++++++++++++++++++++----------------------- ui/trace-events | 2 +- 2 files changed, 23 insertions(+), 24 deletions(-) diff --git a/ui/console.c b/ui/console.c index 3c941528d2..77d62fe76d 100644 --- a/ui/console.c +++ b/ui/console.c @@ -193,6 +193,7 @@ static void dpy_refresh(DisplayState *s); static DisplayState *get_alloc_displaystate(void); static void text_console_update_cursor_timer(void); static void text_console_update_cursor(void *opaque); +static bool ppm_save(int fd, DisplaySurface *ds, Error **errp); =20 static void gui_update(void *opaque) { @@ -308,29 +309,22 @@ void graphic_hw_invalidate(QemuConsole *con) } } =20 -static void ppm_save(const char *filename, DisplaySurface *ds, - Error **errp) +static bool ppm_save(int fd, DisplaySurface *ds, Error **errp) { int width =3D pixman_image_get_width(ds->image); int height =3D pixman_image_get_height(ds->image); - int fd; FILE *f; int y; int ret; pixman_image_t *linebuf; + bool success =3D false; =20 - trace_ppm_save(filename, ds); - fd =3D qemu_open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 06= 66); - if (fd =3D=3D -1) { - error_setg(errp, "failed to open file '%s': %s", filename, - strerror(errno)); - return; - } + trace_ppm_save(fd, ds); f =3D fdopen(fd, "wb"); ret =3D fprintf(f, "P6\n%d %d\n%d\n", width, height, 255); if (ret < 0) { linebuf =3D NULL; - goto write_err; + goto end; } linebuf =3D qemu_pixman_linebuf_create(PIXMAN_BE_r8g8b8, width); for (y =3D 0; y < height; y++) { @@ -339,21 +333,16 @@ static void ppm_save(const char *filename, DisplaySur= face *ds, ret =3D fwrite(pixman_image_get_data(linebuf), 1, pixman_image_get_stride(linebuf), f); (void)ret; - if (ferror(f)) { - goto write_err; - } + success =3D !ferror(f); } =20 -out: +end: + if (!success) { + error_setg(errp, "failed to write to PPM file: %s", strerror(errno= )); + } qemu_pixman_image_unref(linebuf); fclose(f); - return; - -write_err: - error_setg(errp, "failed to write to file '%s': %s", filename, - strerror(errno)); - unlink(filename); - goto out; + return success; } =20 void qmp_screendump(const char *filename, bool has_device, const char *dev= ice, @@ -361,6 +350,7 @@ void qmp_screendump(const char *filename, bool has_devi= ce, const char *device, { QemuConsole *con; DisplaySurface *surface; + int fd; =20 if (has_device) { con =3D qemu_console_lookup_by_device_name(device, has_head ? head= : 0, @@ -387,7 +377,16 @@ void qmp_screendump(const char *filename, bool has_dev= ice, const char *device, return; } =20 - ppm_save(filename, surface, errp); + fd =3D qemu_open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 06= 66); + if (fd =3D=3D -1) { + error_setg(errp, "failed to open file '%s': %s", filename, + strerror(errno)); + return; + } + + if (!ppm_save(fd, surface, errp)) { + unlink(filename); + } } =20 void graphic_hw_text_update(QemuConsole *con, console_ch_t *chardata) diff --git a/ui/trace-events b/ui/trace-events index 63de72a798..0dcda393c1 100644 --- a/ui/trace-events +++ b/ui/trace-events @@ -15,7 +15,7 @@ displaysurface_create_pixman(void *display_surface) "surf= ace=3D%p" displaysurface_free(void *display_surface) "surface=3D%p" displaychangelistener_register(void *dcl, const char *name) "%p [ %s ]" displaychangelistener_unregister(void *dcl, const char *name) "%p [ %s ]" -ppm_save(const char *filename, void *display_surface) "%s surface=3D%p" +ppm_save(int fd, void *display_surface) "fd=3D%d surface=3D%p" =20 # gtk.c # gtk-gl-area.c --=20 2.24.0