Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757243Ab1FFSCT (ORCPT ); Mon, 6 Jun 2011 14:02:19 -0400 Received: from e23smtp08.au.ibm.com ([202.81.31.141]:51369 "EHLO e23smtp08.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757074Ab1FFSCA (ORCPT ); Mon, 6 Jun 2011 14:02:00 -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 3/3] 9p: add 9P2000.L unlinkat operation Date: Mon, 6 Jun 2011 23:31:48 +0530 Message-Id: <1307383308-5773-3-git-send-email-aneesh.kumar@linux.vnet.ibm.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1307383308-5773-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> References: <1307383308-5773-1-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: 5126 Lines: 168 unlinkat - Remove a directory entry size[4] Tunlinkat tag[2] dirfid[4] name[s] flag[4] size[4] Runlinkat tag[2] older Tremove have the below request format size[4] Tremove tag[2] fid[4] The remove message is used to remove a directory entry either file or directory The remove opreation is actually a directory opertation and should ideally have dirfid, if not we cannot represent the fid on server with anything other than name. We will have to derive the directory name from fid in the Tremove request. NOTE: The operation doesn't clunk the unlink fid. Signed-off-by: Aneesh Kumar K.V --- fs/9p/vfs_inode.c | 43 ++++++++++++++++++++++++++----------------- include/net/9p/9p.h | 2 ++ include/net/9p/client.h | 1 + net/9p/client.c | 23 +++++++++++++++++++++++ 4 files changed, 52 insertions(+), 17 deletions(-) diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c index ded6309..f40fdc3 100644 --- a/fs/9p/vfs_inode.c +++ b/fs/9p/vfs_inode.c @@ -492,38 +492,47 @@ v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, /** * v9fs_remove - helper function to remove files and directories * @dir: directory inode that is being deleted - * @file: dentry that is being deleted + * @dentry: dentry that is being deleted * @rmdir: removing a directory * */ -static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) +static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) { int retval; - struct p9_fid *v9fid; - struct inode *file_inode; - - P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file, - rmdir); + struct inode *inode; + struct p9_fid *v9fid, *dfid; - file_inode = file->d_inode; - v9fid = v9fs_fid_clone(file); - if (IS_ERR(v9fid)) - return PTR_ERR(v9fid); + P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", + dir, dentry, flags); - retval = p9_client_remove(v9fid); + inode = dentry->d_inode; + dfid = v9fs_fid_lookup(dentry->d_parent); + if (IS_ERR(dfid)) { + retval = PTR_ERR(dfid); + P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); + return retval; + } + retval = p9_client_unlinkat(dfid, dentry->d_name.name, flags); + if (retval == -EOPNOTSUPP) { + /* Try the one based on path */ + v9fid = v9fs_fid_clone(dentry); + if (IS_ERR(v9fid)) + return PTR_ERR(v9fid); + retval = p9_client_remove(v9fid); + } if (!retval) { /* * directories on unlink should have zero * link count */ - if (rmdir) { - clear_nlink(file_inode); + if (flags & AT_REMOVEDIR) { + clear_nlink(inode); drop_nlink(dir); } else - drop_nlink(file_inode); + drop_nlink(inode); - v9fs_invalidate_inode_attr(file_inode); + v9fs_invalidate_inode_attr(inode); v9fs_invalidate_inode_attr(dir); } return retval; @@ -814,7 +823,7 @@ int v9fs_vfs_unlink(struct inode *i, struct dentry *d) int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) { - return v9fs_remove(i, d, 1); + return v9fs_remove(i, d, AT_REMOVEDIR); } /** diff --git a/include/net/9p/9p.h b/include/net/9p/9p.h index 094c3dd..fe1efa6 100644 --- a/include/net/9p/9p.h +++ b/include/net/9p/9p.h @@ -177,6 +177,8 @@ enum p9_msg_t { P9_RMKDIR, P9_TRENAMEAT = 74, P9_RRENAMEAT, + P9_TUNLINKAT = 76, + P9_RUNLINKAT, P9_TVERSION = 100, P9_RVERSION, P9_TAUTH = 102, diff --git a/include/net/9p/client.h b/include/net/9p/client.h index 5353cbc..976d12a 100644 --- a/include/net/9p/client.h +++ b/include/net/9p/client.h @@ -234,6 +234,7 @@ int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode, int p9_client_clunk(struct p9_fid *fid); int p9_client_fsync(struct p9_fid *fid, int datasync); int p9_client_remove(struct p9_fid *fid); +int p9_client_unlinkat(struct p9_fid *dfid, const char *name, int flags); int p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset, u32 count); int p9_client_write(struct p9_fid *fid, char *data, const char __user *udata, diff --git a/net/9p/client.c b/net/9p/client.c index 677ae8d..d225158 100644 --- a/net/9p/client.c +++ b/net/9p/client.c @@ -1281,6 +1281,29 @@ error: } EXPORT_SYMBOL(p9_client_remove); +int p9_client_unlinkat(struct p9_fid *dfid, const char *name, int flags) +{ + int err = 0; + struct p9_req_t *req; + struct p9_client *clnt; + + P9_DPRINTK(P9_DEBUG_9P, ">>> TUNLINKAT fid %d %s %d\n", + dfid->fid, name, flags); + + clnt = dfid->clnt; + req = p9_client_rpc(clnt, P9_TUNLINKAT, "dsd", dfid->fid, name, flags); + if (IS_ERR(req)) { + err = PTR_ERR(req); + goto error; + } + P9_DPRINTK(P9_DEBUG_9P, "<<< RUNLINKAT fid %d %s\n", dfid->fid, name); + + p9_free_req(clnt, req); +error: + return err; +} +EXPORT_SYMBOL(p9_client_unlinkat); + int p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset, u32 count) -- 1.7.4.1 -- 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/