Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751978Ab0HZLUL (ORCPT ); Thu, 26 Aug 2010 07:20:11 -0400 Received: from e28smtp09.in.ibm.com ([122.248.162.9]:48438 "EHLO e28smtp09.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750881Ab0HZLUJ (ORCPT ); Thu, 26 Aug 2010 07:20:09 -0400 From: "Aneesh Kumar K.V" To: v9fs-developer@lists.sourceforge.net Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, "Aneesh Kumar K.V" Subject: [PATCH -V2 3/6] fs/9p: Implement setting posix acl Date: Thu, 26 Aug 2010 16:49:55 +0530 Message-Id: <1282821598-16472-3-git-send-email-aneesh.kumar@linux.vnet.ibm.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1282821598-16472-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> References: <1282821598-16472-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3736 Lines: 136 This patch also update mode bits, as a normal file system. I am not sure wether we should do that, considering that a setxattr on the server will again update the ACL/mode value Signed-off-by: Aneesh Kumar K.V --- fs/9p/acl.c | 75 ++++++++++++++++++++++++++++++++++++++++++++++++++++- fs/9p/v9fs_vfs.h | 1 + fs/9p/vfs_inode.c | 2 +- 3 files changed, 76 insertions(+), 2 deletions(-) diff --git a/fs/9p/acl.c b/fs/9p/acl.c index e122e63..fc06467 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) { @@ -138,7 +141,77 @@ 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; + size = 0; + } + /* 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 7f0aac1..8f5bf6b 100644 --- a/fs/9p/vfs_inode.c +++ b/fs/9p/vfs_inode.c @@ -1248,7 +1248,7 @@ 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; -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/