From patchwork Tue Aug 24 10:32:36 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Aneesh Kumar K.V" X-Patchwork-Id: 126051 Received: from lists.sourceforge.net (lists.sourceforge.net [216.34.181.88]) by demeter.kernel.org (8.14.4/8.14.3) with ESMTP id o7OAX6Bt014901 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Tue, 24 Aug 2010 10:33:45 GMT Received: from localhost ([127.0.0.1] helo=sfs-ml-3.v29.ch3.sourceforge.com) by sfs-ml-3.v29.ch3.sourceforge.com with esmtp (Exim 4.69) (envelope-from ) id 1OnqoP-0003Sl-9T; Tue, 24 Aug 2010 10:33:01 +0000 Received: from sog-mx-4.v43.ch3.sourceforge.com ([172.29.43.194] helo=mx.sourceforge.net) by sfs-ml-3.v29.ch3.sourceforge.com with esmtp (Exim 4.69) (envelope-from ) id 1OnqoO-0003Sf-7N for v9fs-developer@lists.sourceforge.net; Tue, 24 Aug 2010 10:33:00 +0000 X-ACL-Warn: Received: from e28smtp02.in.ibm.com ([122.248.162.2]) by sog-mx-4.v43.ch3.sourceforge.com with esmtps (TLSv1:AES256-SHA:256) (Exim 4.69) id 1OnqoL-0007FX-Gt for v9fs-developer@lists.sourceforge.net; Tue, 24 Aug 2010 10:33:00 +0000 Received: from d28relay05.in.ibm.com (d28relay05.in.ibm.com [9.184.220.62]) by e28smtp02.in.ibm.com (8.14.4/8.13.1) with ESMTP id o7OAWkxs022800 for ; Tue, 24 Aug 2010 16:02:46 +0530 Received: from d28av05.in.ibm.com (d28av05.in.ibm.com [9.184.220.67]) by d28relay05.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id o7OAWeWU3080300 for ; Tue, 24 Aug 2010 16:02:41 +0530 Received: from d28av05.in.ibm.com (loopback [127.0.0.1]) by d28av05.in.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id o7OAWe6h020107 for ; Tue, 24 Aug 2010 20:32:40 +1000 Received: from localhost.localdomain (skywalker.in.ibm.com [9.124.35.37]) by d28av05.in.ibm.com (8.14.4/8.13.1/NCO v10.0 AVin) with ESMTP id o7OAWegY020098; Tue, 24 Aug 2010 20:32:40 +1000 From: "Aneesh Kumar K.V" To: v9fs-developer@lists.sourceforge.net Date: Tue, 24 Aug 2010 16:02:36 +0530 Message-Id: <1282645959-9973-3-git-send-email-aneesh.kumar@linux.vnet.ibm.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1282645959-9973-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> References: <1282645959-9973-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> X-Spam-Score: 0.5 (/) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.5 AWL AWL: From: address is in the auto white-list X-Headers-End: 1OnqoL-0007FX-Gt Subject: [V9fs-developer] [PATCH 3/6] fs/9p: Implement setting posix acl X-BeenThere: v9fs-developer@lists.sourceforge.net X-Mailman-Version: 2.1.9 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: v9fs-developer-bounces@lists.sourceforge.net X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter.kernel.org [140.211.167.41]); Tue, 24 Aug 2010 10:33:45 +0000 (UTC) diff --git a/fs/9p/acl.c b/fs/9p/acl.c index bb86bdf..1f1b08a 100644 --- a/fs/9p/acl.c +++ b/fs/9p/acl.c @@ -17,8 +17,11 @@ #include #include #include +#include #include #include "xattr.h" +#include "v9fs_vfs.h" + static struct posix_acl *__v9fs_get_acl(struct p9_fid *fid, char *name) { @@ -140,7 +143,76 @@ static int v9fs_xattr_set_acl(struct dentry *dentry, const char *name, const void *value, size_t size, int flags, int type) { - return 0; + int retval; + struct posix_acl *acl; + struct inode *inode = dentry->d_inode; + + if (strcmp(name, "") != 0) + return -EINVAL; + if (S_ISLNK(inode->i_mode)) + return -EOPNOTSUPP; + if (!is_owner_or_cap(inode)) + return -EPERM; + if (value) { + /* update the cached acl value */ + acl = posix_acl_from_xattr(value, size); + if (IS_ERR(acl)) + return PTR_ERR(acl); + else if (acl) { + retval = posix_acl_valid(acl); + if (retval) + goto err_out; + } + } else + acl = NULL; + + switch (type) { + case ACL_TYPE_ACCESS: + name = POSIX_ACL_XATTR_ACCESS; + if (acl) { + mode_t mode = inode->i_mode; + retval = posix_acl_equiv_mode(acl, &mode); + if (retval < 0) + goto err_out; + else { + struct iattr iattr; + if (retval == 0) { + /* + * ACL can be represented + * by the mode bits. So don't + * update ACL. + */ + acl = NULL; + value = NULL; + } + /* Updte the mode bits */ + iattr.ia_mode = ((mode & S_IALLUGO) | + (inode->i_mode & ~S_IALLUGO)); + iattr.ia_valid = ATTR_MODE; + /* FIXME should we update ctime ? + * What is the following setxattr update the + * mode ? + */ + v9fs_vfs_setattr_dotl(dentry, &iattr); + } + } + break; + case ACL_TYPE_DEFAULT: + name = POSIX_ACL_XATTR_DEFAULT; + if (!S_ISDIR(inode->i_mode)) { + retval = -EINVAL; + goto err_out; + } + break; + default: + BUG(); + } + retval = v9fs_xattr_set(dentry, name, value, size, flags); + if (!retval) + set_cached_acl(inode, type, acl); +err_out: + posix_acl_release(acl); + return retval; } const struct xattr_handler v9fs_xattr_acl_access_handler = { diff --git a/fs/9p/v9fs_vfs.h b/fs/9p/v9fs_vfs.h index f47c6bb..6e87de5 100644 --- a/fs/9p/v9fs_vfs.h +++ b/fs/9p/v9fs_vfs.h @@ -64,3 +64,4 @@ int v9fs_uflags2omode(int uflags, int extended); ssize_t v9fs_file_readn(struct file *, char *, char __user *, u32, u64); void v9fs_blank_wstat(struct p9_wstat *wstat); +int v9fs_vfs_setattr_dotl(struct dentry *, struct iattr *); diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c index c6d96e4..8703561 100644 --- a/fs/9p/vfs_inode.c +++ b/fs/9p/vfs_inode.c @@ -1245,7 +1245,7 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) * */ -static int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr) +int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr) { int retval; struct v9fs_session_info *v9ses;