diff options
| author | Ian Campbell <ian.campbell@citrix.com> | 2009-02-07 05:46:48 +0300 |
|---|---|---|
| committer | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2010-10-21 03:22:26 +0400 |
| commit | 655d406a7c80bffc03263d071b6ba1e0fcf548f9 (patch) | |
| tree | d3cbe97860bff0d347111ff293b6f5b3124bf67e /drivers/xen/xenfs/super.c | |
| parent | cd07202cc8262e1669edff0d97715f3dd9260917 (diff) | |
| download | linux-655d406a7c80bffc03263d071b6ba1e0fcf548f9.tar.xz | |
xen: add /proc/xen/xsd_{kva,port} to xenfs
These are used by the userspace xenstore daemon, which runs in dom0.
Xenstored is what's behind the xenfs "xenbus" filesystem.
[ Impact: provide mapping and port to usermode for xenstore ]
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Diffstat (limited to 'drivers/xen/xenfs/super.c')
| -rw-r--r-- | drivers/xen/xenfs/super.c | 54 |
1 files changed, 53 insertions, 1 deletions
diff --git a/drivers/xen/xenfs/super.c b/drivers/xen/xenfs/super.c index 78bfab0700ba..3cf7707217f2 100644 --- a/drivers/xen/xenfs/super.c +++ b/drivers/xen/xenfs/super.c @@ -22,6 +22,46 @@ MODULE_DESCRIPTION("Xen filesystem"); MODULE_LICENSE("GPL"); +static struct inode *xenfs_make_inode(struct super_block *sb, int mode) +{ + struct inode *ret = new_inode(sb); + + if (ret) { + ret->i_mode = mode; + ret->i_uid = ret->i_gid = 0; + ret->i_blocks = 0; + ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME; + } + return ret; +} + +static struct dentry *xenfs_create_file(struct super_block *sb, + struct dentry *parent, + const char *name, + const struct file_operations *fops, + void *data, + int mode) +{ + struct dentry *dentry; + struct inode *inode; + + dentry = d_alloc_name(parent, name); + if (!dentry) + return NULL; + + inode = xenfs_make_inode(sb, S_IFREG | mode); + if (!inode) { + dput(dentry); + return NULL; + } + + inode->i_fop = fops; + inode->i_private = data; + + d_add(dentry, inode); + return dentry; +} + static ssize_t capabilities_read(struct file *file, char __user *buf, size_t size, loff_t *off) { @@ -45,8 +85,20 @@ static int xenfs_fill_super(struct super_block *sb, void *data, int silent) { "capabilities", &capabilities_file_ops, S_IRUGO }, {""}, }; + int rc; + + rc = simple_fill_super(sb, XENFS_SUPER_MAGIC, xenfs_files); + if (rc < 0) + return rc; + + if (xen_initial_domain()) { + xenfs_create_file(sb, sb->s_root, "xsd_kva", + &xsd_kva_file_ops, NULL, S_IRUSR|S_IWUSR); + xenfs_create_file(sb, sb->s_root, "xsd_port", + &xsd_port_file_ops, NULL, S_IRUSR|S_IWUSR); + } - return simple_fill_super(sb, XENFS_SUPER_MAGIC, xenfs_files); + return rc; } static int xenfs_get_sb(struct file_system_type *fs_type, |