From patchwork Mon Feb 5 10:49:41 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?SsO8cmdlbiBHcm/Dnw==?= X-Patchwork-Id: 13545237 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 58B0EC48291 for ; Mon, 5 Feb 2024 10:57:49 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.675838.1051463 (Exim 4.92) (envelope-from ) id 1rWwfU-0003Nz-QF; Mon, 05 Feb 2024 10:57:40 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 675838.1051463; Mon, 05 Feb 2024 10:57:40 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1rWwfU-0003N5-Mg; Mon, 05 Feb 2024 10:57:40 +0000 Received: by outflank-mailman (input) for mailman id 675838; Mon, 05 Feb 2024 10:57:39 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1rWwZF-0000qL-LD for xen-devel@lists.xenproject.org; Mon, 05 Feb 2024 10:51:13 +0000 Received: from smtp-out2.suse.de (smtp-out2.suse.de [2a07:de40:b251:101:10:150:64:2]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id 79ce377d-c414-11ee-98f5-efadbce2ee36; Mon, 05 Feb 2024 11:51:11 +0100 (CET) Received: from imap1.dmz-prg2.suse.org (imap1.dmz-prg2.suse.org [IPv6:2a07:de40:b281:104:10:150:64:97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 9CE161F8C5; Mon, 5 Feb 2024 10:51:11 +0000 (UTC) Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id 71686132DD; Mon, 5 Feb 2024 10:51:11 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id Jy0lGp+9wGVXNgAAD6G6ig (envelope-from ); Mon, 05 Feb 2024 10:51:11 +0000 X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 79ce377d-c414-11ee-98f5-efadbce2ee36 From: Juergen Gross To: xen-devel@lists.xenproject.org Cc: Juergen Gross , Wei Liu , Anthony PERARD Subject: [PATCH v4 12/32] tools/xen-9pfsd: add 9pfs stat request support Date: Mon, 5 Feb 2024 11:49:41 +0100 Message-Id: <20240205105001.24171-13-jgross@suse.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20240205105001.24171-1-jgross@suse.com> References: <20240205105001.24171-1-jgross@suse.com> MIME-Version: 1.0 Authentication-Results: smtp-out2.suse.de; none X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Spamd-Result: default: False [-4.00 / 50.00]; REPLY(-4.00)[] X-Rspamd-Queue-Id: 9CE161F8C5 Add the stat request of the 9pfs protocol. Signed-off-by: Juergen Gross Acked-by: Anthony PERARD Reviewed-by: Jason Andryuk --- V3: - use fstatat() (Jason Andryuk) V4: - add "s" format to fill_buffer() as a preparation for reading dirs --- tools/xen-9pfsd/io.c | 102 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 102 insertions(+) diff --git a/tools/xen-9pfsd/io.c b/tools/xen-9pfsd/io.c index 583eea6059..031cff9f0e 100644 --- a/tools/xen-9pfsd/io.c +++ b/tools/xen-9pfsd/io.c @@ -34,6 +34,7 @@ #define P9_CMD_OPEN 112 #define P9_CMD_CREATE 114 #define P9_CMD_CLUNK 120 +#define P9_CMD_STAT 124 /* P9 protocol open flags. */ #define P9_OREAD 0 /* read */ @@ -60,6 +61,25 @@ struct p9_qid { uint64_t path; }; +struct p9_stat { + uint16_t size; + uint16_t type; + uint32_t dev; + struct p9_qid qid; + uint32_t mode; + uint32_t atime; + uint32_t mtime; + uint64_t length; + const char *name; + const char *uid; + const char *gid; + const char *muid; + const char *extension; + uint32_t n_uid; + uint32_t n_gid; + uint32_t n_muid; +}; + /* * Note that the ring names "in" and "out" are from the frontend's * perspective, so the "in" ring will be used for responses to the frontend, @@ -166,6 +186,7 @@ static void fmt_err(const char *fmt) * S: String (2 byte length + characters) * The length is obtained via strlen() of the parameter, being a pointer * to the first character of the string + * s: stat (struct p9_stat) * U: 4 byte unsigned integer * The parameter is a pointer to a uint32_t value */ @@ -176,6 +197,8 @@ static void vfill_buffer_at(void **data, const char *fmt, va_list ap) const void *par; const char *str_val; const struct p9_qid *qid; + const struct p9_stat *stat; + uint16_t tlen; unsigned int len; unsigned int array_sz = 0; unsigned int elem_sz = 0; @@ -259,6 +282,18 @@ static void vfill_buffer_at(void **data, const char *fmt, va_list ap) *data += len; break; + case 's': + stat = par; + elem_sz = sizeof(*stat); + tlen = stat->size + sizeof(stat->size); + fill_buffer_at(data, "uuuUQUUULSSSSSUUU", &tlen, &stat->size, + &stat->type, &stat->dev, &stat->qid, &stat->mode, + &stat->atime, &stat->mtime, &stat->length, + stat->name, stat->uid, stat->gid, stat->muid, + stat->extension, &stat->n_uid, &stat->n_gid, + &stat->n_muid); + break; + case 'U': put_unaligned(*(const uint32_t *)par, (uint32_t *)*data); elem_sz = sizeof(uint32_t); @@ -1148,6 +1183,69 @@ static void p9_clunk(struct ring *ring, struct p9_header *hdr) fill_buffer(ring, hdr->cmd + 1, hdr->tag, ""); } +static void fill_p9_stat(device *device, struct p9_stat *p9s, struct stat *st, + const char *name) +{ + memset(p9s, 0, sizeof(*p9s)); + fill_qid(device, NULL, &p9s->qid, st); + p9s->mode = st->st_mode & 0777; + if ( S_ISDIR(st->st_mode) ) + p9s->mode |= P9_CREATE_PERM_DIR; + p9s->atime = st->st_atime; + p9s->mtime = st->st_mtime; + p9s->length = st->st_size; + p9s->name = name; + p9s->uid = ""; + p9s->gid = ""; + p9s->muid = ""; + p9s->extension = ""; + p9s->n_uid = 0; + p9s->n_gid = 0; + p9s->n_muid = 0; + + /* + * Size of individual fields without the size field, including 5 2-byte + * string length fields. + */ + p9s->size = 71 + strlen(p9s->name); +} + +static void p9_stat(struct ring *ring, struct p9_header *hdr) +{ + device *device = ring->device; + uint32_t fid; + struct p9_fid *fidp; + struct p9_stat p9s; + struct stat st; + int ret; + + ret = fill_data(ring, "U", &fid); + if ( ret != 1 ) + { + p9_error(ring, hdr->tag, EINVAL); + return; + } + + fidp = get_fid_ref(device, fid); + if ( !fidp ) + { + p9_error(ring, hdr->tag, ENOENT); + return; + } + + if ( fstatat(device->root_fd, fidp->path, &st, 0) < 0 ) + { + p9_error(ring, hdr->tag, errno); + goto out; + } + fill_p9_stat(device, &p9s, &st, strrchr(fidp->path, '/') + 1); + + fill_buffer(ring, hdr->cmd + 1, hdr->tag, "s", &p9s); + + out: + free_fid(device, fidp); +} + void *io_thread(void *arg) { struct ring *ring = arg; @@ -1227,6 +1325,10 @@ void *io_thread(void *arg) p9_clunk(ring, &hdr); break; + case P9_CMD_STAT: + p9_stat(ring, &hdr); + break; + default: syslog(LOG_DEBUG, "%u.%u sent unhandled command %u\n", ring->device->domid, ring->device->devid, hdr.cmd);