[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH v2 12/29] tools/xenlogd: add 9pfs stat request support
Add the stat request of the 9pfs protocol. Signed-off-by: Juergen Gross <jgross@xxxxxxxx> Reviewed-by: Jason Andryuk <jandryuk@xxxxxxxxx> --- tools/xen-9pfsd/io.c | 92 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 92 insertions(+) diff --git a/tools/xen-9pfsd/io.c b/tools/xen-9pfsd/io.c index a605f51dc6..e5abd25857 100644 --- a/tools/xen-9pfsd/io.c +++ b/tools/xen-9pfsd/io.c @@ -33,6 +33,7 @@ #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 */ @@ -59,6 +60,25 @@ 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, @@ -1136,6 +1156,74 @@ static void p9_clunk(struct ring *ring, struct p9_header *hdr) fill_buffer(ring, hdr->cmd + 1, hdr->tag, ""); } +static void fill_p9_stat(struct p9_stat *p9s, struct stat *st, const char *name) +{ + memset(p9s, 0, sizeof(*p9s)); + fill_qid(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; + uint16_t total_length; + 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 ( stat(fidp->path, &st) < 0 ) + { + p9_error(ring, hdr->tag, errno); + goto out; + } + fill_p9_stat(&p9s, &st, strrchr(fidp->path, '/') + 1); + + total_length = p9s.size + sizeof(p9s.size); + fill_buffer(ring, hdr->cmd + 1, hdr->tag, "uuuUQUUULSSSSSUUU", + &total_length, &p9s.size, &p9s.type, &p9s.dev, &p9s.qid, + &p9s.mode, &p9s.atime, &p9s.mtime, &p9s.length, p9s.name, + p9s.uid, p9s.gid, p9s.muid, p9s.extension, &p9s.n_uid, + &p9s.n_gid, &p9s.n_muid); + + out: + free_fid(device, fidp); +} + void *io_thread(void *arg) { struct ring *ring = arg; @@ -1215,6 +1303,10 @@ 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); -- 2.35.3
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