@@ -37,6 +37,7 @@
#include <linux/mount.h>
#include <linux/idr.h>
#include <linux/sched.h>
+#include <linux/statfs.h>
#include <net/9p/9p.h>
#include <net/9p/client.h>
@@ -208,12 +209,48 @@ v9fs_umount_begin(struct super_block *sb)
v9fs_session_cancel(v9ses);
}
+static int v9fs_statfs(struct dentry *dentry, struct kstatfs *buf)
+{
+ struct v9fs_session_info *v9ses;
+ struct p9_fid *fid;
+ struct p9_rstatfs rs;
+ int res;
+
+ fid = v9fs_fid_lookup(dentry);
+ if (IS_ERR(fid)) {
+ res = PTR_ERR(fid);
+ goto done;
+ }
+
+ v9ses = v9fs_inode2v9ses(dentry->d_inode);
+ if (v9fs_proto_dotl(v9ses)) {
+ res = p9_client_statfs(fid, &rs);
+ if (res == 0) {
+ buf->f_type = rs.type;
+ buf->f_bsize = rs.bsize;
+ buf->f_blocks = rs.blocks;
+ buf->f_bfree = rs.bfree;
+ buf->f_bavail = rs.bavail;
+ buf->f_files = rs.files;
+ buf->f_ffree = rs.ffree;
+ buf->f_fsid.val[0] = rs.fsid & 0xFFFFFFFFUL;
+ buf->f_fsid.val[1] = (rs.fsid >> 32) & 0xFFFFFFFFUL;
+ buf->f_namelen = rs.namelen;
+ }
+ if (res != -ENOSYS)
+ goto done;
+ }
+ res = simple_statfs(dentry, buf);
+done:
+ return res;
+}
+
static const struct super_operations v9fs_super_ops = {
#ifdef CONFIG_9P_FSCACHE
.alloc_inode = v9fs_alloc_inode,
.destroy_inode = v9fs_destroy_inode,
#endif
- .statfs = simple_statfs,
+ .statfs = v9fs_statfs,
.clear_inode = v9fs_clear_inode,
.show_options = generic_show_options,
.umount_begin = v9fs_umount_begin,
@@ -86,6 +86,8 @@ do { \
/**
* enum p9_msg_t - 9P message types
+ * @P9_TSTATFS: file system status request
+ * @P9_RSTATFS: file system status response
* @P9_TVERSION: version handshake request
* @P9_RVERSION: version handshake response
* @P9_TAUTH: request to establish authentication channel
@@ -125,6 +127,8 @@ do { \
*/
enum p9_msg_t {
+ P9_TSTATFS = 8,
+ P9_RSTATFS,
P9_TVERSION = 100,
P9_RVERSION,
P9_TAUTH = 102,
@@ -350,6 +354,22 @@ struct p9_wstat {
};
/* Structures for Protocol Operations */
+struct p9_tstatfs {
+ u32 fid;
+};
+
+struct p9_rstatfs {
+ u32 type;
+ u32 bsize;
+ u64 blocks;
+ u64 bfree;
+ u64 bavail;
+ u64 files;
+ u64 ffree;
+ u64 fsid;
+ u32 namelen;
+};
+
struct p9_tversion {
u32 msize;
struct p9_str version;
@@ -194,6 +194,7 @@ struct p9_fid {
struct list_head dlist; /* list of all fids attached to a dentry */
};
+int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb);
int p9_client_version(struct p9_client *);
struct p9_client *p9_client_create(const char *dev_name, char *options);
void p9_client_destroy(struct p9_client *clnt);
@@ -1348,3 +1348,42 @@ error:
return err;
}
EXPORT_SYMBOL(p9_client_wstat);
+
+int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb)
+{
+ int err;
+ struct p9_req_t *req;
+ struct p9_client *clnt;
+
+ err = 0;
+ clnt = fid->clnt;
+
+ P9_DPRINTK(P9_DEBUG_9P, ">>> TSTATFS fid %d\n", fid->fid);
+
+ req = p9_client_rpc(clnt, P9_TSTATFS, "d", fid->fid);
+ if (IS_ERR(req)) {
+ err = PTR_ERR(req);
+ goto error;
+ }
+
+ err = p9pdu_readf(req->rc, clnt->proto_version, "ddqqqqqqd", &sb->type,
+ &sb->bsize, &sb->blocks, &sb->bfree, &sb->bavail,
+ &sb->files, &sb->ffree, &sb->fsid, &sb->namelen);
+ if (err) {
+ p9pdu_dump(1, req->rc);
+ p9_free_req(clnt, req);
+ goto error;
+ }
+
+ P9_DPRINTK(P9_DEBUG_9P, "<<< RSTATFS fid %d type 0x%lx bsize %ld "
+ "blocks %llu bfree %llu bavail %llu files %llu ffree %llu "
+ "fsid %llu namelen %ld\n",
+ fid->fid, (long unsigned int)sb->type, (long int)sb->bsize,
+ sb->blocks, sb->bfree, sb->bavail, sb->files, sb->ffree,
+ sb->fsid, (long int)sb->namelen);
+
+ p9_free_req(clnt, req);
+error:
+ return err;
+}
+EXPORT_SYMBOL(p9_client_statfs);