diff options
Diffstat (limited to 'fs/afs/xattr.c')
-rw-r--r-- | fs/afs/xattr.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/fs/afs/xattr.c b/fs/afs/xattr.c index e729ee3d4b02..b7d3d714d8ff 100644 --- a/fs/afs/xattr.c +++ b/fs/afs/xattr.c @@ -16,6 +16,7 @@ #include "internal.h" static const char afs_xattr_list[] = + "afs.acl\0" "afs.cell\0" "afs.fid\0" "afs.volume"; @@ -34,6 +35,57 @@ ssize_t afs_listxattr(struct dentry *dentry, char *buffer, size_t size) } /* + * Get a file's ACL. + */ +static int afs_xattr_get_acl(const struct xattr_handler *handler, + struct dentry *dentry, + struct inode *inode, const char *name, + void *buffer, size_t size) +{ + struct afs_fs_cursor fc; + struct afs_vnode *vnode = AFS_FS_I(inode); + struct afs_acl *acl = NULL; + struct key *key; + int ret; + + key = afs_request_key(vnode->volume->cell); + if (IS_ERR(key)) + return PTR_ERR(key); + + ret = -ERESTARTSYS; + if (afs_begin_vnode_operation(&fc, vnode, key)) { + while (afs_select_fileserver(&fc)) { + fc.cb_break = afs_calc_vnode_cb_break(vnode); + acl = afs_fs_fetch_acl(&fc); + } + + afs_check_for_remote_deletion(&fc, fc.vnode); + afs_vnode_commit_status(&fc, vnode, fc.cb_break); + ret = afs_end_vnode_operation(&fc); + } + + if (ret == 0) { + ret = acl->size; + if (size > 0) { + ret = -ERANGE; + if (acl->size > size) + return -ERANGE; + memcpy(buffer, acl->data, acl->size); + ret = acl->size; + } + 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, +}; + +/* * Get the name of the cell on which a file resides. */ static int afs_xattr_get_cell(const struct xattr_handler *handler, @@ -123,6 +175,7 @@ static const struct xattr_handler afs_xattr_afs_volume_handler = { }; const struct xattr_handler *afs_xattr_handlers[] = { + &afs_xattr_afs_acl_handler, &afs_xattr_afs_cell_handler, &afs_xattr_afs_fid_handler, &afs_xattr_afs_volume_handler, |