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hw/9pfs: Update v9fs_statfs 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 16:04:01 -07:00
parent 94840ff9f3
commit 88a4763e88
2 changed files with 43 additions and 69 deletions
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90
hw/9pfs/virtio-9p.c
View File

@ -3036,79 +3036,75 @@ out:
qemu_free(vs);
}
static void v9fs_statfs_post_statfs(V9fsState *s, V9fsStatfsState *vs, int err)
static int v9fs_fill_statfs(V9fsState *s, V9fsPDU *pdu, struct statfs *stbuf)
{
uint32_t f_type;
uint32_t f_bsize;
uint64_t f_blocks;
uint64_t f_bfree;
uint64_t f_bavail;
uint64_t f_files;
uint64_t f_ffree;
uint64_t fsid_val;
uint32_t f_namelen;
size_t offset = 7;
int32_t bsize_factor;
if (err) {
err = -errno;
goto out;
}
/*
* compute bsize factor based on host file system block size
* and client msize
*/
bsize_factor = (s->msize - P9_IOHDRSZ)/vs->stbuf.f_bsize;
bsize_factor = (s->msize - P9_IOHDRSZ)/stbuf->f_bsize;
if (!bsize_factor) {
bsize_factor = 1;
}
vs->v9statfs.f_type = vs->stbuf.f_type;
vs->v9statfs.f_bsize = vs->stbuf.f_bsize;
vs->v9statfs.f_bsize *= bsize_factor;
f_type = stbuf->f_type;
f_bsize = stbuf->f_bsize;
f_bsize *= bsize_factor;
/*
* f_bsize is adjusted(multiplied) by bsize factor, so we need to
* adjust(divide) the number of blocks, free blocks and available
* blocks by bsize factor
*/
vs->v9statfs.f_blocks = vs->stbuf.f_blocks/bsize_factor;
vs->v9statfs.f_bfree = vs->stbuf.f_bfree/bsize_factor;
vs->v9statfs.f_bavail = vs->stbuf.f_bavail/bsize_factor;
vs->v9statfs.f_files = vs->stbuf.f_files;
vs->v9statfs.f_ffree = vs->stbuf.f_ffree;
vs->v9statfs.fsid_val = (unsigned int) vs->stbuf.f_fsid.__val[0] |
(unsigned long long)vs->stbuf.f_fsid.__val[1] << 32;
vs->v9statfs.f_namelen = vs->stbuf.f_namelen;
f_blocks = stbuf->f_blocks/bsize_factor;
f_bfree = stbuf->f_bfree/bsize_factor;
f_bavail = stbuf->f_bavail/bsize_factor;
f_files = stbuf->f_files;
f_ffree = stbuf->f_ffree;
fsid_val = (unsigned int) stbuf->f_fsid.__val[0] |
(unsigned long long)stbuf->f_fsid.__val[1] << 32;
f_namelen = stbuf->f_namelen;
vs->offset += pdu_marshal(vs->pdu, vs->offset, "ddqqqqqqd",
vs->v9statfs.f_type, vs->v9statfs.f_bsize, vs->v9statfs.f_blocks,
vs->v9statfs.f_bfree, vs->v9statfs.f_bavail, vs->v9statfs.f_files,
vs->v9statfs.f_ffree, vs->v9statfs.fsid_val,
vs->v9statfs.f_namelen);
out:
complete_pdu(s, vs->pdu, vs->offset);
qemu_free(vs);
return pdu_marshal(pdu, offset, "ddqqqqqqd",
f_type, f_bsize, f_blocks, f_bfree,
f_bavail, f_files, f_ffree,
fsid_val, f_namelen);
}
static void v9fs_statfs(void *opaque)
{
int32_t fid;
ssize_t retval = 0;
size_t offset = 7;
V9fsFidState *fidp;
struct statfs stbuf;
V9fsPDU *pdu = opaque;
V9fsState *s = pdu->s;
V9fsStatfsState *vs;
ssize_t err = 0;
vs = qemu_malloc(sizeof(*vs));
vs->pdu = pdu;
vs->offset = 7;
memset(&vs->v9statfs, 0, sizeof(vs->v9statfs));
pdu_unmarshal(vs->pdu, vs->offset, "d", &vs->fid);
vs->fidp = lookup_fid(s, vs->fid);
if (vs->fidp == NULL) {
err = -ENOENT;
pdu_unmarshal(pdu, offset, "d", &fid);
fidp = lookup_fid(s, fid);
if (fidp == NULL) {
retval = -ENOENT;
goto out;
}
err = v9fs_do_statfs(s, &vs->fidp->path, &vs->stbuf);
v9fs_statfs_post_statfs(s, vs, err);
return;
retval = v9fs_co_statfs(s, &fidp->path, &stbuf);
if (retval < 0) {
goto out;
}
retval = offset;
retval += v9fs_fill_statfs(s, pdu, &stbuf);
out:
complete_pdu(s, vs->pdu, err);
qemu_free(vs);
complete_pdu(s, pdu, retval);
return;
}

22
hw/9pfs/virtio-9p.h
View File

@ -398,28 +398,6 @@ struct virtio_9p_config
uint8_t tag[0];
} __attribute__((packed));
typedef struct V9fsStatfs
{
uint32_t f_type;
uint32_t f_bsize;
uint64_t f_blocks;
uint64_t f_bfree;
uint64_t f_bavail;
uint64_t f_files;
uint64_t f_ffree;
uint64_t fsid_val;
uint32_t f_namelen;
} V9fsStatfs;
typedef struct V9fsStatfsState {
V9fsPDU *pdu;
size_t offset;
int32_t fid;
V9fsStatfs v9statfs;
V9fsFidState *fidp;
struct statfs stbuf;
} V9fsStatfsState;
typedef struct V9fsMkState {
V9fsPDU *pdu;
size_t offset;