9p: getattr client implementation for 9P2000.L protocol.

[mirror_ubuntu-jammy-kernel.git] / net / 9p / protocol.c

diff --git a/net/9p/protocol.c b/net/9p/protocol.c
index e7541d5b011831e6c945d9cfb9163c90f9b1d1fd..3e4f776958917f94486dde65cd6b1b8e19c7709d 100644 (file)
--- a/net/9p/protocol.c
+++ b/net/9p/protocol.c
@@ -141,6 +141,7 @@ pdu_write_u(struct p9_fcall *pdu, const char __user *udata, size_t size)
        D - data blob (int32_t size followed by void *, results are not freed)
        T - array of strings (int16_t count, followed by strings)
        R - array of qids (int16_t count, followed by qids)
+       A - stat for 9p2000.L (p9_stat_dotl)
        ? - if optional = 1, continue parsing
 */
 
@@ -340,8 +341,36 @@ p9pdu_vreadf(struct p9_fcall *pdu, int proto_version, const char *fmt,
                                }
                        }
                        break;
+               case 'A': {
+                               struct p9_stat_dotl *stbuf =
+                                   va_arg(ap, struct p9_stat_dotl *);
+
+                               memset(stbuf, 0, sizeof(struct p9_stat_dotl));
+                               errcode =
+                                   p9pdu_readf(pdu, proto_version,
+                                       "qQdddqqqqqqqqqqqqqqq",
+                                       &stbuf->st_result_mask,
+                                       &stbuf->qid,
+                                       &stbuf->st_mode,
+                                       &stbuf->st_uid, &stbuf->st_gid,
+                                       &stbuf->st_nlink,
+                                       &stbuf->st_rdev, &stbuf->st_size,
+                                       &stbuf->st_blksize, &stbuf->st_blocks,
+                                       &stbuf->st_atime_sec,
+                                       &stbuf->st_atime_nsec,
+                                       &stbuf->st_mtime_sec,
+                                       &stbuf->st_mtime_nsec,
+                                       &stbuf->st_ctime_sec,
+                                       &stbuf->st_ctime_nsec,
+                                       &stbuf->st_btime_sec,
+                                       &stbuf->st_btime_nsec,
+                                       &stbuf->st_gen,
+                                       &stbuf->st_data_version);
+                       }
+                       break;
                case '?':
-                       if (proto_version != p9_proto_2000u)
+                       if ((proto_version != p9_proto_2000u) &&
+                               (proto_version != p9_proto_2000L))
                                return 0;
                        break;
                default:
@@ -393,7 +422,7 @@ p9pdu_vwritef(struct p9_fcall *pdu, int proto_version, const char *fmt,
                                const char *sptr = va_arg(ap, const char *);
                                int16_t len = 0;
                                if (sptr)
-                                       len = MIN(strlen(sptr), USHORT_MAX);
+                                       len = MIN(strlen(sptr), USHRT_MAX);
 
                                errcode = p9pdu_writef(pdu, proto_version,
                                                                "w", len);
@@ -488,7 +517,8 @@ p9pdu_vwritef(struct p9_fcall *pdu, int proto_version, const char *fmt,
                        }
                        break;
                case '?':
-                       if (proto_version != p9_proto_2000u)
+                       if ((proto_version != p9_proto_2000u) &&
+                               (proto_version != p9_proto_2000L))
                                return 0;
                        break;
                default:
@@ -578,3 +608,30 @@ void p9pdu_reset(struct p9_fcall *pdu)
        pdu->offset = 0;
        pdu->size = 0;
 }
+
+int p9dirent_read(char *buf, int len, struct p9_dirent *dirent,
+                                               int proto_version)
+{
+       struct p9_fcall fake_pdu;
+       int ret;
+       char *nameptr;
+
+       fake_pdu.size = len;
+       fake_pdu.capacity = len;
+       fake_pdu.sdata = buf;
+       fake_pdu.offset = 0;
+
+       ret = p9pdu_readf(&fake_pdu, proto_version, "Qqbs", &dirent->qid,
+                       &dirent->d_off, &dirent->d_type, &nameptr);
+       if (ret) {
+               P9_DPRINTK(P9_DEBUG_9P, "<<< p9dirent_read failed: %d\n", ret);
+               p9pdu_dump(1, &fake_pdu);
+               goto out;
+       }
+
+       strcpy(dirent->d_name, nameptr);
+
+out:
+       return fake_pdu.offset;
+}
+EXPORT_SYMBOL(p9dirent_read);