diff options
author | M. Mohan Kumar <mohan@in.ibm.com> | 2010-06-16 04:57:01 -0400 |
---|---|---|
committer | Eric Van Hensbergen <ericvh@gmail.com> | 2010-08-02 15:28:30 -0400 |
commit | 4b43516ab19b748b48322937fd9307af17541c4d (patch) | |
tree | 0ab84e8d69abce9d63e1937b1a807d2243444a01 /fs/9p/vfs_inode.c | |
parent | 50cc42ff3d7bc48a436c5a0413459ca7841b505f (diff) |
9p: Implement TMKNOD
Synopsis
size[4] Tmknod tag[2] fid[4] name[s] mode[4] major[4] minor[4] gid[4]
size[4] Rmknod tag[2] qid[13]
Description
mknod asks the file server to create a device node with given major and
minor number, mode and gid. The qid for the new device node is returned
with the mknod reply message.
[sripathik@in.ibm.com: Fix error handling code]
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Diffstat (limited to 'fs/9p/vfs_inode.c')
-rw-r--r-- | fs/9p/vfs_inode.c | 106 |
1 files changed, 103 insertions, 3 deletions
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c index a7319364544b..4d9f45ec6126 100644 --- a/fs/9p/vfs_inode.c +++ b/fs/9p/vfs_inode.c | |||
@@ -302,7 +302,13 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode) | |||
302 | case S_IFBLK: | 302 | case S_IFBLK: |
303 | case S_IFCHR: | 303 | case S_IFCHR: |
304 | case S_IFSOCK: | 304 | case S_IFSOCK: |
305 | if (!v9fs_proto_dotu(v9ses)) { | 305 | if (v9fs_proto_dotl(v9ses)) { |
306 | inode->i_op = &v9fs_file_inode_operations_dotl; | ||
307 | inode->i_fop = &v9fs_file_operations_dotl; | ||
308 | } else if (v9fs_proto_dotu(v9ses)) { | ||
309 | inode->i_op = &v9fs_file_inode_operations; | ||
310 | inode->i_fop = &v9fs_file_operations; | ||
311 | } else { | ||
306 | P9_DPRINTK(P9_DEBUG_ERROR, | 312 | P9_DPRINTK(P9_DEBUG_ERROR, |
307 | "special files without extended mode\n"); | 313 | "special files without extended mode\n"); |
308 | err = -EINVAL; | 314 | err = -EINVAL; |
@@ -1616,6 +1622,100 @@ v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) | |||
1616 | return retval; | 1622 | return retval; |
1617 | } | 1623 | } |
1618 | 1624 | ||
1625 | /** | ||
1626 | * v9fs_vfs_mknod_dotl - create a special file | ||
1627 | * @dir: inode destination for new link | ||
1628 | * @dentry: dentry for file | ||
1629 | * @mode: mode for creation | ||
1630 | * @rdev: device associated with special file | ||
1631 | * | ||
1632 | */ | ||
1633 | static int | ||
1634 | v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int mode, | ||
1635 | dev_t rdev) | ||
1636 | { | ||
1637 | int err; | ||
1638 | char *name; | ||
1639 | struct v9fs_session_info *v9ses; | ||
1640 | struct p9_fid *fid = NULL, *dfid = NULL; | ||
1641 | struct inode *inode; | ||
1642 | gid_t gid; | ||
1643 | struct p9_qid qid; | ||
1644 | struct dentry *dir_entry; | ||
1645 | |||
1646 | P9_DPRINTK(P9_DEBUG_VFS, | ||
1647 | " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, | ||
1648 | dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); | ||
1649 | |||
1650 | if (!new_valid_dev(rdev)) | ||
1651 | return -EINVAL; | ||
1652 | |||
1653 | v9ses = v9fs_inode2v9ses(dir); | ||
1654 | dir_dentry = v9fs_dentry_from_dir_inode(dir); | ||
1655 | dfid = v9fs_fid_lookup(dir_entry); | ||
1656 | if (IS_ERR(dfid)) { | ||
1657 | err = PTR_ERR(dfid); | ||
1658 | P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); | ||
1659 | dfid = NULL; | ||
1660 | goto error; | ||
1661 | } | ||
1662 | |||
1663 | gid = v9fs_get_fsgid_for_create(dir); | ||
1664 | if (gid < 0) { | ||
1665 | P9_DPRINTK(P9_DEBUG_VFS, "v9fs_get_fsgid_for_create failed\n"); | ||
1666 | goto error; | ||
1667 | } | ||
1668 | |||
1669 | name = (char *) dentry->d_name.name; | ||
1670 | |||
1671 | err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid); | ||
1672 | if (err < 0) | ||
1673 | goto error; | ||
1674 | |||
1675 | /* instantiate inode and assign the unopened fid to the dentry */ | ||
1676 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { | ||
1677 | fid = p9_client_walk(dfid, 1, &name, 1); | ||
1678 | if (IS_ERR(fid)) { | ||
1679 | err = PTR_ERR(fid); | ||
1680 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", | ||
1681 | err); | ||
1682 | fid = NULL; | ||
1683 | goto error; | ||
1684 | } | ||
1685 | |||
1686 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); | ||
1687 | if (IS_ERR(inode)) { | ||
1688 | err = PTR_ERR(inode); | ||
1689 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", | ||
1690 | err); | ||
1691 | goto error; | ||
1692 | } | ||
1693 | dentry->d_op = &v9fs_cached_dentry_operations; | ||
1694 | d_instantiate(dentry, inode); | ||
1695 | err = v9fs_fid_add(dentry, fid); | ||
1696 | if (err < 0) | ||
1697 | goto error; | ||
1698 | fid = NULL; | ||
1699 | } else { | ||
1700 | /* | ||
1701 | * Not in cached mode. No need to populate inode with stat. | ||
1702 | * socket syscall returns a fd, so we need instantiate | ||
1703 | */ | ||
1704 | inode = v9fs_get_inode(dir->i_sb, mode); | ||
1705 | if (IS_ERR(inode)) { | ||
1706 | err = PTR_ERR(inode); | ||
1707 | goto error; | ||
1708 | } | ||
1709 | dentry->d_op = &v9fs_dentry_operations; | ||
1710 | d_instantiate(dentry, inode); | ||
1711 | } | ||
1712 | |||
1713 | error: | ||
1714 | if (fid) | ||
1715 | p9_client_clunk(fid); | ||
1716 | return err; | ||
1717 | } | ||
1718 | |||
1619 | static const struct inode_operations v9fs_dir_inode_operations_dotu = { | 1719 | static const struct inode_operations v9fs_dir_inode_operations_dotu = { |
1620 | .create = v9fs_vfs_create, | 1720 | .create = v9fs_vfs_create, |
1621 | .lookup = v9fs_vfs_lookup, | 1721 | .lookup = v9fs_vfs_lookup, |
@@ -1624,7 +1724,7 @@ static const struct inode_operations v9fs_dir_inode_operations_dotu = { | |||
1624 | .unlink = v9fs_vfs_unlink, | 1724 | .unlink = v9fs_vfs_unlink, |
1625 | .mkdir = v9fs_vfs_mkdir, | 1725 | .mkdir = v9fs_vfs_mkdir, |
1626 | .rmdir = v9fs_vfs_rmdir, | 1726 | .rmdir = v9fs_vfs_rmdir, |
1627 | .mknod = v9fs_vfs_mknod, | 1727 | .mknod = v9fs_vfs_mknod_dotl, |
1628 | .rename = v9fs_vfs_rename, | 1728 | .rename = v9fs_vfs_rename, |
1629 | .getattr = v9fs_vfs_getattr, | 1729 | .getattr = v9fs_vfs_getattr, |
1630 | .setattr = v9fs_vfs_setattr, | 1730 | .setattr = v9fs_vfs_setattr, |
@@ -1638,7 +1738,7 @@ static const struct inode_operations v9fs_dir_inode_operations_dotl = { | |||
1638 | .unlink = v9fs_vfs_unlink, | 1738 | .unlink = v9fs_vfs_unlink, |
1639 | .mkdir = v9fs_vfs_mkdir, | 1739 | .mkdir = v9fs_vfs_mkdir, |
1640 | .rmdir = v9fs_vfs_rmdir, | 1740 | .rmdir = v9fs_vfs_rmdir, |
1641 | .mknod = v9fs_vfs_mknod, | 1741 | .mknod = v9fs_vfs_mknod_dotl, |
1642 | .rename = v9fs_vfs_rename, | 1742 | .rename = v9fs_vfs_rename, |
1643 | .getattr = v9fs_vfs_getattr_dotl, | 1743 | .getattr = v9fs_vfs_getattr_dotl, |
1644 | .setattr = v9fs_vfs_setattr_dotl, | 1744 | .setattr = v9fs_vfs_setattr_dotl, |