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hw/9pfs: Update v9fs_getattr to use coroutines 

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
This commit is contained in:
Aneesh Kumar K.V 2011-05-18 16:04:33 -07:00
parent 172198d4db
commit 8db21ce73a
2 changed files with 19 additions and 46 deletions
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57
hw/9pfs/virtio-9p.c
View File

@ -1086,7 +1086,7 @@ static int stat_to_v9stat(V9fsState *s, V9fsString *name,
static void stat_to_v9stat_dotl(V9fsState *s, const struct stat *stbuf, static void stat_to_v9stat_dotl(V9fsState *s, const struct stat *stbuf,
V9fsStatDotl *v9lstat) V9fsStatDotl *v9lstat)
{ {
memset(v9lstat, 0, sizeof(*v9lstat)); memset(v9lstat, 0, sizeof(*v9lstat));
@ -1283,57 +1283,38 @@ out:
qemu_free(vs); qemu_free(vs);
} }
static void v9fs_getattr_post_lstat(V9fsState *s, V9fsStatStateDotl *vs,
int err)
{
if (err == -1) {
err = -errno;
goto out;
}
stat_to_v9stat_dotl(s, &vs->stbuf, &vs->v9stat_dotl);
vs->offset += pdu_marshal(vs->pdu, vs->offset, "A", &vs->v9stat_dotl);
err = vs->offset;
out:
complete_pdu(s, vs->pdu, err);
qemu_free(vs);
}
static void v9fs_getattr(void *opaque) static void v9fs_getattr(void *opaque)
{ {
V9fsPDU *pdu = opaque;
V9fsState *s = pdu->s;
int32_t fid; int32_t fid;
V9fsStatStateDotl *vs; size_t offset = 7;
ssize_t err = 0; ssize_t retval = 0;
struct stat stbuf;
V9fsFidState *fidp; V9fsFidState *fidp;
uint64_t request_mask; uint64_t request_mask;
V9fsStatDotl v9stat_dotl;
V9fsPDU *pdu = opaque;
V9fsState *s = pdu->s;
vs = qemu_malloc(sizeof(*vs)); pdu_unmarshal(pdu, offset, "dq", &fid, &request_mask);
vs->pdu = pdu;
vs->offset = 7;
memset(&vs->v9stat_dotl, 0, sizeof(vs->v9stat_dotl));
pdu_unmarshal(vs->pdu, vs->offset, "dq", &fid, &request_mask);
fidp = lookup_fid(s, fid); fidp = lookup_fid(s, fid);
if (fidp == NULL) { if (fidp == NULL) {
err = -ENOENT; retval = -ENOENT;
goto out; goto out;
} }
/*
/* Currently we only support BASIC fields in stat, so there is no * Currently we only support BASIC fields in stat, so there is no
* need to look at request_mask. * need to look at request_mask.
*/ */
err = v9fs_do_lstat(s, &fidp->path, &vs->stbuf); retval = v9fs_co_lstat(s, &fidp->path, &stbuf);
v9fs_getattr_post_lstat(s, vs, err); if (retval < 0) {
return; goto out;
}
stat_to_v9stat_dotl(s, &stbuf, &v9stat_dotl);
retval = offset;
retval += pdu_marshal(pdu, offset, "A", &v9stat_dotl);
out: out:
complete_pdu(s, vs->pdu, err); complete_pdu(s, pdu, retval);
qemu_free(vs);
} }
/* From Linux kernel code */ /* From Linux kernel code */

8
hw/9pfs/virtio-9p.h
View File

@ -278,14 +278,6 @@ typedef struct V9fsStatDotl {
uint64_t st_data_version; uint64_t st_data_version;
} V9fsStatDotl; } V9fsStatDotl;
typedef struct V9fsStatStateDotl {
V9fsPDU *pdu;
size_t offset;
V9fsStatDotl v9stat_dotl;
struct stat stbuf;
} V9fsStatStateDotl;
typedef struct V9fsWalkState { typedef struct V9fsWalkState {
V9fsPDU *pdu; V9fsPDU *pdu;
size_t offset; size_t offset;