From: M. Mohan Kumar mo...@in.ibm.com
SYNOPSIS
size[4] Tgetattr tag[2] fid[4]
size[4] Rgetattr tag[2] lstat[n]
DESCRIPTION
The getattr transaction inquires about the file identified by fid.
The reply will contain a machine-independent directory entry,
laid out as follows:
qid.type[1]
the type of the file (directory, etc.), represented as a bit
vector corresponding to the high 8 bits of the file's mode
word.
qid.vers[4]
version number for given path
qid.path[8]
the file server's unique identification for the file
st_mode[4]
Permission and flags
st_nlink[8]
Number of hard links
st_uid[4]
User id of owner
st_gid[4]
Group ID of owner
st_rdev[8]
Device ID (if special file)
st_size[8]
Size, in bytes
st_blksize[8]
Block size for file system IO
st_blocks[8]
Number of file system blocks allocated
st_atime_sec[8]
Time of last access, seconds
st_atime_nsec[8]
Time of last access, nanoseconds
st_mtime_sec[8]
Time of last modification, seconds
st_mtime_nsec[8]
Time of last modification, nanoseconds
st_ctime_sec[8]
Time of last status change, seconds
st_ctime_nsec[8]
Time of last status change, nanoseconds
This patch implements the client side of getattr implementation for 9P2000.L.
It introduces a new structure p9_stat_dotl for getting Linux stat information
along with QID. The data layout is similar to stat structure in Linux user
space with the following major differences:
inode (st_ino) is not part of data. Instead qid is.
device (st_dev) is not part of data because this doesn't make sense on the
client.
All time variables are 64 bit wide on the wire. The kernel seems to use
32 bit variables for these variables. However, some of the architectures
have used 64 bit variables and glibc exposes 64 bit variables to user
space on some architectures. Hence to be on the safer side we have made
these 64 bit in the protocol. Refer to the comments in
include/asm-generic/stat.h
Signed-off-by: M. Mohan Kumar mo...@in.ibm.com
Signed-off-by: Sripathi Kodi sripat...@in.ibm.com
---
hw/virtio-9p-debug.c | 32
hw/virtio-9p.c | 82 ++
hw/virtio-9p.h | 28 +
3 files changed, 142 insertions(+), 0 deletions(-)
diff --git a/hw/virtio-9p-debug.c b/hw/virtio-9p-debug.c
index a82b771..8bb817d 100644
--- a/hw/virtio-9p-debug.c
+++ b/hw/virtio-9p-debug.c
@@ -178,6 +178,30 @@ static void pprint_stat(V9fsPDU *pdu, int rx, size_t
*offsetp, const char *name)
fprintf(llogfile, });
}
+static void pprint_stat_dotl(V9fsPDU *pdu, int rx, size_t *offsetp,
+ const char *name)
+{
+fprintf(llogfile, %s={, name);
+pprint_qid(pdu, rx, offsetp, qid);
+pprint_int32(pdu, rx, offsetp, , st_mode);
+pprint_int64(pdu, rx, offsetp, , st_nlink);
+pprint_int32(pdu, rx, offsetp, , st_uid);
+pprint_int32(pdu, rx, offsetp, , st_gid);
+pprint_int64(pdu, rx, offsetp, , st_rdev);
+pprint_int64(pdu, rx, offsetp, , st_size);
+pprint_int64(pdu, rx, offsetp, , st_blksize);
+pprint_int64(pdu, rx, offsetp, , st_blocks);
+pprint_int64(pdu, rx, offsetp, , atime);
+pprint_int64(pdu, rx, offsetp, , atime_nsec);
+pprint_int64(pdu, rx, offsetp, , mtime);
+pprint_int64(pdu, rx, offsetp, , mtime_nsec);
+pprint_int64(pdu, rx, offsetp, , ctime);
+pprint_int64(pdu, rx, offsetp, , ctime_nsec);
+fprintf(llogfile, });
+}
+
+
+
static void pprint_strs(V9fsPDU *pdu, int rx, size_t *offsetp, const char
*name)
{
int sg_count = get_sg_count(pdu, rx);
@@ -351,6 +375,14 @@ void pprint_pdu(V9fsPDU *pdu)
pprint_int32(pdu, 1, offset, msize);
pprint_str(pdu, 1, offset, , version);
break;
+case P9_TGETATTR:
+fprintf(llogfile, TGETATTR: ();
+pprint_int32(pdu, 0, offset, fid);
+break;
+case P9_RGETATTR:
+fprintf(llogfile, RGETATTR: ();
+pprint_stat_dotl(pdu, 1, offset, getattr);
+break;
case P9_TAUTH:
fprintf(llogfile, TAUTH: ();
pprint_int32(pdu, 0, offset, afid);
diff --git a/hw/virtio-9p.c b/hw/virtio-9p.c
index 097dce8..23ae8b8 100644
--- a/hw/virtio-9p.c
+++ b/hw/virtio-9p.c
@@ -737,6 +737,17 @@ static size_t pdu_marshal(V9fsPDU *pdu, size_t offset,
const char *fmt, ...)
statp-n_gid, statp-n_muid);
break;
}
+case 'A': {
+V9fsStatDotl *statp = va_arg(ap, V9fsStatDotl *);
+offset += pdu_marshal(pdu, offset, Qdqddqq,
+
