提交 be940c87 编写于 作者: M M. Mohan Kumar 提交者: Aneesh Kumar K.V

qemu: virtio-9p: Implement statfs support in server

Implement statfs support in qemu server based on Sripathi's
initial statfs patch.
Signed-off-by: NM. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: NSripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: NVenkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
上级 84151514
......@@ -74,6 +74,7 @@ typedef struct FileOperations
int (*rename)(FsContext *, const char *, const char *);
int (*truncate)(FsContext *, const char *, off_t);
int (*fsync)(FsContext *, int);
int (*statfs)(FsContext *s, const char *path, struct statfs *stbuf);
void *opaque;
} FileOperations;
#endif
......@@ -466,6 +466,11 @@ static int local_fsync(FsContext *ctx, int fd)
return fsync(fd);
}
static int local_statfs(FsContext *s, const char *path, struct statfs *stbuf)
{
return statfs(rpath(s, path), stbuf);
}
FileOperations local_ops = {
.lstat = local_lstat,
.readlink = local_readlink,
......@@ -493,4 +498,5 @@ FileOperations local_ops = {
.utime = local_utime,
.remove = local_remove,
.fsync = local_fsync,
.statfs = local_statfs,
};
......@@ -2144,9 +2144,72 @@ out:
qemu_free(vs);
}
static int v9fs_do_statfs(V9fsState *s, V9fsString *path, struct statfs *stbuf)
{
return s->ops->statfs(&s->ctx, path->data, stbuf);
}
static void v9fs_statfs_post_statfs(V9fsState *s, V9fsStatfsState *vs, int err)
{
if (err) {
err = -errno;
goto out;
}
vs->v9statfs.f_type = vs->stbuf.f_type;
vs->v9statfs.f_bsize = vs->stbuf.f_bsize;
vs->v9statfs.f_blocks = vs->stbuf.f_blocks;
vs->v9statfs.f_bfree = vs->stbuf.f_bfree;
vs->v9statfs.f_bavail = vs->stbuf.f_bavail;
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;
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);
}
static void v9fs_statfs(V9fsState *s, V9fsPDU *pdu)
{
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;
goto out;
}
err = v9fs_do_statfs(s, &vs->fidp->path, &vs->stbuf);
v9fs_statfs_post_statfs(s, vs, err);
return;
out:
complete_pdu(s, vs->pdu, err);
qemu_free(vs);
}
typedef void (pdu_handler_t)(V9fsState *s, V9fsPDU *pdu);
static pdu_handler_t *pdu_handlers[] = {
[P9_TSTATFS] = v9fs_statfs,
[P9_TVERSION] = v9fs_version,
[P9_TATTACH] = v9fs_attach,
[P9_TSTAT] = v9fs_stat,
......
......@@ -13,6 +13,8 @@
#define VIRTIO_9P_MOUNT_TAG 0
enum {
P9_TSTATFS = 8,
P9_RSTATFS,
P9_TVERSION = 100,
P9_RVERSION,
P9_TAUTH = 102,
......@@ -252,6 +254,28 @@ 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;
extern size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count,
size_t offset, size_t size, int pack);
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册