diff options
| author | Sripathi Kodi <sripathik@in.ibm.com> | 2010-03-25 12:45:30 +0000 |
|---|---|---|
| committer | Eric Van Hensbergen <ericvh@gmail.com> | 2010-05-21 16:44:33 -0500 |
| commit | bda8e7752063cdbdd1d308bc1705400a8cec1aeb (patch) | |
| tree | cfc751da04d3ffe46d7b7e935f7ceb21b1f8a8d0 /fs/9p/vfs_super.c | |
| parent | 9b6533c9b331ddbba9a40c972d82222ecffbc359 (diff) | |
9p: add 9P2000.L statfs operation
I made a V2 of this patch on top of my patches for VFS switches. The
change was adding v9fs_statfs pointer to v9fs_super_ops_dotl
instead of v9fs_super_ops.
statfs - get file system statistics
size[4] Tstatfs tag[2] fid[4]
size[4] Rstatfs tag[2] type[4] bsize[4] blocks[8] bfree[8] bavail[8]
files[8] ffree[8] fsid[8] namelen[4]
The statfs message is used to request file system information returned
by the statfs(2) system call, which is used by df(1) to report file
system and disk space usage.
Signed-off-by: Jim Garlick <garlick@llnl.gov>
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Diffstat (limited to 'fs/9p/vfs_super.c')
| -rw-r--r-- | fs/9p/vfs_super.c | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c index cc3fa8c3aab..be74d020436 100644 --- a/fs/9p/vfs_super.c +++ b/fs/9p/vfs_super.c @@ -38,6 +38,7 @@ #include <linux/idr.h> #include <linux/sched.h> #include <linux/slab.h> +#include <linux/statfs.h> #include <net/9p/9p.h> #include <net/9p/client.h> @@ -214,6 +215,42 @@ v9fs_umount_begin(struct super_block *sb) v9fs_session_begin_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, @@ -230,7 +267,7 @@ static const struct super_operations v9fs_super_ops_dotl = { .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, |