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a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1708002373; 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=U8pzJQi1IB2cDnOVCOc5xAPOt+AhORB1buKXKU5naO0=; b=J/JBlX4J7n2B15CvskZcQARsA1c7jI2Djn679BAZHKO0wEn52fkCoTxWqYV4Dz08ddNc9Y a1FxHqPoO8uzp4E/WnY+OECOsbwxrzwBRvT1jtJAlr971pixwqxQzeVaqQS5yOgh5zOZaZ Iy71AX5RPzhc8EflbEjfaqKpOJ/Iqkw= From: Juergen Gross To: xen-devel@lists.xenproject.org Cc: Juergen Gross , Wei Liu , Anthony PERARD , Jason Andryuk Subject: [PATCH v7 11/21] tools/xen-9pfsd: add 9pfs stat request support Date: Thu, 15 Feb 2024 14:04:59 +0100 Message-Id: <20240215130509.24008-12-jgross@suse.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20240215130509.24008-1-jgross@suse.com> References: <20240215130509.24008-1-jgross@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Authentication-Results: smtp-out1.suse.de; none X-Spamd-Result: default: False [1.90 / 50.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; R_MISSING_CHARSET(2.50)[]; MIME_GOOD(-0.10)[text/plain]; TO_MATCH_ENVRCPT_ALL(0.00)[]; BROKEN_CONTENT_TYPE(1.50)[]; RCPT_COUNT_FIVE(0.00)[5]; RCVD_COUNT_THREE(0.00)[3]; DKIM_SIGNED(0.00)[suse.com:s=susede1]; MID_CONTAINS_FROM(1.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.com:email,citrix.com:email]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_CC(0.00)[suse.com,xen.org,citrix.com,gmail.com]; RCVD_TLS_ALL(0.00)[]; BAYES_HAM(-3.00)[100.00%] X-Spam-Level: * X-Spam-Score: 1.90 X-Spam-Flag: NO X-ZohoMail-DKIM: pass (identity @suse.com) X-ZM-MESSAGEID: 1708002613954100003 Content-Type: text/plain; charset="utf-8" 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/9pfsd/io.c | 102 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 102 insertions(+) diff --git a/tools/9pfsd/io.c b/tools/9pfsd/io.c index 8fa80865b4..8c36106d90 100644 --- a/tools/9pfsd/io.c +++ b/tools/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 =20 /* P9 protocol open flags. */ #define P9_OREAD 0 /* read */ @@ -60,6 +61,25 @@ struct p9_qid { uint64_t path; }; =20 +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 fronten= d, @@ -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 *fm= t, 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 =3D 0; unsigned int elem_sz =3D 0; @@ -259,6 +282,18 @@ static void vfill_buffer_at(void **data, const char *f= mt, va_list ap) *data +=3D len; break; =20 + case 's': + stat =3D par; + elem_sz =3D sizeof(*stat); + tlen =3D stat->size + sizeof(stat->size); + fill_buffer_at(data, "uuuUQUUULSSSSSUUU", &tlen, &stat->size, + &stat->type, &stat->dev, &stat->qid, &stat->mod= e, + &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 =3D sizeof(uint32_t); @@ -1146,6 +1181,69 @@ static void p9_clunk(struct ring *ring, struct p9_he= ader *hdr) fill_buffer(ring, hdr->cmd + 1, hdr->tag, ""); } =20 +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 =3D st->st_mode & 0777; + if ( S_ISDIR(st->st_mode) ) + p9s->mode |=3D P9_CREATE_PERM_DIR; + p9s->atime =3D st->st_atime; + p9s->mtime =3D st->st_mtime; + p9s->length =3D st->st_size; + p9s->name =3D name; + p9s->uid =3D ""; + p9s->gid =3D ""; + p9s->muid =3D ""; + p9s->extension =3D ""; + p9s->n_uid =3D 0; + p9s->n_gid =3D 0; + p9s->n_muid =3D 0; + + /* + * Size of individual fields without the size field, including 5 2-byte + * string length fields. + */ + p9s->size =3D 71 + strlen(p9s->name); +} + +static void p9_stat(struct ring *ring, struct p9_header *hdr) +{ + device *device =3D ring->device; + uint32_t fid; + struct p9_fid *fidp; + struct p9_stat p9s; + struct stat st; + int ret; + + ret =3D fill_data(ring, "U", &fid); + if ( ret !=3D 1 ) + { + p9_error(ring, hdr->tag, EINVAL); + return; + } + + fidp =3D 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 =3D arg; @@ -1225,6 +1323,10 @@ void *io_thread(void *arg) p9_clunk(ring, &hdr); break; =20 + 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); --=20 2.35.3