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authorJoe Gorse <jhgorse@gmail.com>2019-04-25 14:26:52 +0100
committerDavid Howells <dhowells@redhat.com>2019-05-07 16:48:44 +0100
commitb10494af4989d2d20679d0e3b7d1a45c2f8f8f1a (patch)
tree27a9fcdea021ddcb324da97695aa2efb8326ff69 /fs/afs/xattr.c
parent260f082bae6dcf70aeae2cc3e24aecb55bdb1c99 (diff)
downloadlinux-b10494af4989d2d20679d0e3b7d1a45c2f8f8f1a.tar.bz2
afs: implement acl setting
Implements the setting of ACLs in AFS by means of setting the afs.acl extended attribute on the file. Signed-off-by: Joe Gorse <jhgorse@gmail.com> Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'fs/afs/xattr.c')
-rw-r--r--fs/afs/xattr.c52
1 files changed, 50 insertions, 2 deletions
diff --git a/fs/afs/xattr.c b/fs/afs/xattr.c
index b7d3d714d8ff..31db360947a6 100644
--- a/fs/afs/xattr.c
+++ b/fs/afs/xattr.c
@@ -80,9 +80,57 @@ static int afs_xattr_get_acl(const struct xattr_handler *handler,
return ret;
}
+/*
+ * Set a file's AFS3 ACL.
+ */
+static int afs_xattr_set_acl(const struct xattr_handler *handler,
+ struct dentry *dentry,
+ struct inode *inode, const char *name,
+ const void *buffer, size_t size, int flags)
+{
+ struct afs_fs_cursor fc;
+ struct afs_vnode *vnode = AFS_FS_I(inode);
+ struct afs_acl *acl = NULL;
+ struct key *key;
+ int ret;
+
+ if (flags == XATTR_CREATE)
+ return -EINVAL;
+
+ key = afs_request_key(vnode->volume->cell);
+ if (IS_ERR(key))
+ return PTR_ERR(key);
+
+ acl = kmalloc(sizeof(*acl) + size, GFP_KERNEL);
+ if (!acl) {
+ key_put(key);
+ return -ENOMEM;
+ }
+
+ acl->size = size;
+ memcpy(acl->data, buffer, size);
+
+ ret = -ERESTARTSYS;
+ if (afs_begin_vnode_operation(&fc, vnode, key)) {
+ while (afs_select_fileserver(&fc)) {
+ fc.cb_break = afs_calc_vnode_cb_break(vnode);
+ afs_fs_store_acl(&fc, acl);
+ }
+
+ afs_check_for_remote_deletion(&fc, fc.vnode);
+ afs_vnode_commit_status(&fc, vnode, fc.cb_break);
+ ret = afs_end_vnode_operation(&fc);
+ }
+
+ kfree(acl);
+ key_put(key);
+ return ret;
+}
+
static const struct xattr_handler afs_xattr_afs_acl_handler = {
- .name = "afs.acl",
- .get = afs_xattr_get_acl,
+ .name = "afs.acl",
+ .get = afs_xattr_get_acl,
+ .set = afs_xattr_set_acl,
};
/*