xemu-project/xemu
1
0
Fork 0
mirror of https://github.com/xemu-project/xemu.git synced 2024-11-24 12:09:58 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

qemu: virtio-9p: Implement TMKNOD

Browse Source 
Implement TMKNOD as part of 2000.L Work

Synopsis

    size[4] Tmknod tag[2] fid[4] name[s] mode[4] major[4] minor[4] gid[4]

    size[4] Rmknod tag[2] qid[13]

Description

    mknod asks the file server to create a device node with given device
    type, mode and gid. The qid for the new device node is returned with
    the mknod reply message.

Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
This commit is contained in:
M. Mohan Kumar 2010-06-22 12:24:09 +05:30 committed by Aneesh Kumar K.V
parent c1568af597
commit 5268cecc6d
3 changed files with 107 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
hw/virtio-9p-debug.c
View File

@ -488,6 +488,19 @@ void pprint_pdu(V9fsPDU *pdu)
pprint_qid(pdu, 1, &offset, "qid");
pprint_int32(pdu, 1, &offset, ", iounit");
break;
case P9_TMKNOD:
fprintf(llogfile, "TMKNOD: (");
pprint_int32(pdu, 0, &offset, "fid");
pprint_str(pdu, 0, &offset, "name");
pprint_int32(pdu, 0, &offset, "mode");
pprint_int32(pdu, 0, &offset, "major");
pprint_int32(pdu, 0, &offset, "minor");
pprint_int32(pdu, 0, &offset, "gid");
break;
case P9_RMKNOD:
fprintf(llogfile, "RMKNOD: )");
pprint_qid(pdu, 0, &offset, "qid");
break;
case P9_TREAD:
fprintf(llogfile, "TREAD: (");
pprint_int32(pdu, 0, &offset, "fid");

90
hw/virtio-9p.c
View File

@ -160,15 +160,16 @@ static int v9fs_do_chmod(V9fsState *s, V9fsString *path, mode_t mode)
return s->ops->chmod(&s->ctx, path->data, &cred);
}
static int v9fs_do_mknod(V9fsState *s, V9fsCreateState *vs, mode_t mode,
dev_t dev)
static int v9fs_do_mknod(V9fsState *s, char *name,
mode_t mode, dev_t dev, uid_t uid, gid_t gid)
{
FsCred cred;
cred_init(&cred);
cred.fc_uid = vs->fidp->uid;
cred.fc_uid = uid;
cred.fc_gid = gid;
cred.fc_mode = mode;
cred.fc_rdev = dev;
return s->ops->mknod(&s->ctx, vs->fullname.data, &cred);
return s->ops->mknod(&s->ctx, name, &cred);
}
static int v9fs_do_mkdir(V9fsState *s, V9fsCreateState *vs)
@ -2332,13 +2333,16 @@ static void v9fs_create_post_lstat(V9fsState *s, V9fsCreateState *vs, int err)
}
nmode |= vs->perm & 0777;
err = v9fs_do_mknod(s, vs, nmode, makedev(major, minor));
err = v9fs_do_mknod(s, vs->fullname.data, nmode,
makedev(major, minor), vs->fidp->uid, -1);
v9fs_create_post_perms(s, vs, err);
} else if (vs->perm & P9_STAT_MODE_NAMED_PIPE) {
err = v9fs_do_mknod(s, vs, S_IFIFO | (vs->perm & 0777), 0);
err = v9fs_do_mknod(s, vs->fullname.data, S_IFIFO | (vs->perm & 0777),
0, vs->fidp->uid, -1);
v9fs_post_create(s, vs, err);
} else if (vs->perm & P9_STAT_MODE_SOCKET) {
err = v9fs_do_mknod(s, vs, S_IFSOCK | (vs->perm & 0777), 0);
err = v9fs_do_mknod(s, vs->fullname.data, S_IFSOCK | (vs->perm & 0777),
0, vs->fidp->uid, -1);
v9fs_post_create(s, vs, err);
} else {
vs->fidp->fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid,
@ -2849,6 +2853,77 @@ out:
qemu_free(vs);
}
static void v9fs_mknod_post_lstat(V9fsState *s, V9fsMkState *vs, int err)
{
if (err == -1) {
err = -errno;
goto out;
}
stat_to_qid(&vs->stbuf, &vs->qid);
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid);
err = vs->offset;
out:
complete_pdu(s, vs->pdu, err);
v9fs_string_free(&vs->fullname);
v9fs_string_free(&vs->name);
qemu_free(vs);
}
static void v9fs_mknod_post_mknod(V9fsState *s, V9fsMkState *vs, int err)
{
if (err == -1) {
err = -errno;
goto out;
}
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
v9fs_mknod_post_lstat(s, vs, err);
return;
out:
complete_pdu(s, vs->pdu, err);
v9fs_string_free(&vs->fullname);
v9fs_string_free(&vs->name);
qemu_free(vs);
}
static void v9fs_mknod(V9fsState *s, V9fsPDU *pdu)
{
int32_t fid;
V9fsMkState *vs;
int err = 0;
V9fsFidState *fidp;
gid_t gid;
int mode;
int major, minor;
vs = qemu_malloc(sizeof(*vs));
vs->pdu = pdu;
vs->offset = 7;
v9fs_string_init(&vs->fullname);
pdu_unmarshal(vs->pdu, vs->offset, "dsdddd", &fid, &vs->name, &mode,
&major, &minor, &gid);
fidp = lookup_fid(s, fid);
if (fidp == NULL) {
err = -ENOENT;
goto out;
}
v9fs_string_sprintf(&vs->fullname, "%s/%s", fidp->path.data, vs->name.data);
err = v9fs_do_mknod(s, vs->fullname.data, mode, makedev(major, minor),
fidp->uid, gid);
v9fs_mknod_post_mknod(s, vs, err);
return;
out:
complete_pdu(s, vs->pdu, err);
v9fs_string_free(&vs->fullname);
v9fs_string_free(&vs->name);
qemu_free(vs);
}
typedef void (pdu_handler_t)(V9fsState *s, V9fsPDU *pdu);
static pdu_handler_t *pdu_handlers[] = {
@ -2856,6 +2931,7 @@ static pdu_handler_t *pdu_handlers[] = {
[P9_TSTATFS] = v9fs_statfs,
[P9_TGETATTR] = v9fs_getattr,
[P9_TSETATTR] = v9fs_setattr,
[P9_TMKNOD] = v9fs_mknod,
[P9_TVERSION] = v9fs_version,
[P9_TATTACH] = v9fs_attach,
[P9_TSTAT] = v9fs_stat,

11
hw/virtio-9p.h
View File

@ -19,6 +19,8 @@ enum {
P9_RLCREATE,
P9_TSYMLINK = 16,
P9_RSYMLINK,
P9_TMKNOD = 18,
P9_RMKNOD,
P9_TGETATTR = 24,
P9_RGETATTR,
P9_TSETATTR = 26,
@ -372,6 +374,15 @@ typedef struct V9fsStatfsState {
struct statfs stbuf;
} V9fsStatfsState;
typedef struct V9fsMkState {
V9fsPDU *pdu;
size_t offset;
V9fsQID qid;
struct stat stbuf;
V9fsString name;
V9fsString fullname;
} V9fsMkState;
extern size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count,
size_t offset, size_t size, int pack);