From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752743AbZIHW6R (ORCPT ); Tue, 8 Sep 2009 18:58:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752663AbZIHW6P (ORCPT ); Tue, 8 Sep 2009 18:58:15 -0400 Received: from cobra.newdream.net ([66.33.216.30]:57546 "EHLO cobra.newdream.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752660AbZIHW5m (ORCPT ); Tue, 8 Sep 2009 18:57:42 -0400 From: Sage Weil To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Sage Weil Subject: [PATCH 18/20] ceph: ioctls Date: Tue, 8 Sep 2009 15:56:39 -0700 Message-Id: <1252450601-17610-19-git-send-email-sage@newdream.net> X-Mailer: git-send-email 1.5.6.5 In-Reply-To: <1252450601-17610-18-git-send-email-sage@newdream.net> References: <1252450601-17610-1-git-send-email-sage@newdream.net> <1252450601-17610-2-git-send-email-sage@newdream.net> <1252450601-17610-3-git-send-email-sage@newdream.net> <1252450601-17610-4-git-send-email-sage@newdream.net> <1252450601-17610-5-git-send-email-sage@newdream.net> <1252450601-17610-6-git-send-email-sage@newdream.net> <1252450601-17610-7-git-send-email-sage@newdream.net> <1252450601-17610-8-git-send-email-sage@newdream.net> <1252450601-17610-9-git-send-email-sage@newdream.net> <1252450601-17610-10-git-send-email-sage@newdream.net> <1252450601-17610-11-git-send-email-sage@newdream.net> <1252450601-17610-12-git-send-email-sage@newdream.net> <1252450601-17610-13-git-send-email-sage@newdream.net> <1252450601-17610-14-git-send-email-sage@newdream.net> <1252450601-17610-15-git-send-email-sage@newdream.net> <1252450601-17610-16-git-send-email-sage@newdream.net> <1252450601-17610-17-git-send-email-sage@newdream.net> <1252450601-17610-18-git-send-email-sage@newdream.net> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org A few Ceph ioctls for getting and setting file layout (striping) parameters. Signed-off-by: Sage Weil --- fs/ceph/ioctl.c | 98 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ fs/ceph/ioctl.h | 20 +++++++++++ 2 files changed, 118 insertions(+), 0 deletions(-) create mode 100644 fs/ceph/ioctl.c create mode 100644 fs/ceph/ioctl.h diff --git a/fs/ceph/ioctl.c b/fs/ceph/ioctl.c new file mode 100644 index 0000000..bf5a9d9 --- /dev/null +++ b/fs/ceph/ioctl.c @@ -0,0 +1,98 @@ +#include "ioctl.h" +#include "super.h" +#include "ceph_debug.h" + + +/* + * ioctls + */ + +/* + * get and set the file layout + */ +static long ceph_ioctl_get_layout(struct file *file, void __user *arg) +{ + struct ceph_inode_info *ci = ceph_inode(file->f_dentry->d_inode); + struct ceph_ioctl_layout l; + int err; + + err = ceph_do_getattr(file->f_dentry->d_inode, CEPH_STAT_CAP_LAYOUT); + if (!err) { + l.stripe_unit = ceph_file_layout_su(ci->i_layout); + l.stripe_count = ceph_file_layout_stripe_count(ci->i_layout); + l.object_size = ceph_file_layout_object_size(ci->i_layout); + l.data_pool = le32_to_cpu(ci->i_layout.fl_pg_pool); + if (copy_to_user(arg, &l, sizeof(l))) + return -EFAULT; + } + + return err; +} + +static long ceph_ioctl_set_layout(struct file *file, void __user *arg) +{ + struct inode *inode = file->f_dentry->d_inode; + struct inode *parent_inode = file->f_dentry->d_parent->d_inode; + struct ceph_mds_client *mdsc = &ceph_sb_to_client(inode->i_sb)->mdsc; + struct ceph_mds_request *req; + struct ceph_ioctl_layout l; + int err, i; + + /* copy and validate */ + if (copy_from_user(&l, arg, sizeof(l))) + return -EFAULT; + + if ((l.object_size & ~PAGE_MASK) || + (l.stripe_unit & ~PAGE_MASK) || + !l.stripe_unit || + (l.object_size && + (unsigned)l.object_size % (unsigned)l.stripe_unit)) + return -EINVAL; + + /* make sure it's a valid data pool */ + if (l.data_pool > 0) { + mutex_lock(&mdsc->mutex); + err = -EINVAL; + for (i = 0; i < mdsc->mdsmap->m_num_data_pg_pools; i++) + if (mdsc->mdsmap->m_data_pg_pools[i] == l.data_pool) { + err = 0; + break; + } + mutex_unlock(&mdsc->mutex); + if (err) + return err; + } + + req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETLAYOUT, + USE_AUTH_MDS); + if (IS_ERR(req)) + return PTR_ERR(req); + req->r_inode = igrab(inode); + req->r_inode_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL; + + req->r_args.setlayout.layout.fl_stripe_unit = + cpu_to_le32(l.stripe_unit); + req->r_args.setlayout.layout.fl_stripe_count = + cpu_to_le32(l.stripe_count); + req->r_args.setlayout.layout.fl_object_size = + cpu_to_le32(l.object_size); + req->r_args.setlayout.layout.fl_pg_pool = cpu_to_le32(l.data_pool); + req->r_args.setlayout.layout.fl_pg_preferred = cpu_to_le32((s32)-1); + + err = ceph_mdsc_do_request(mdsc, parent_inode, req); + ceph_mdsc_put_request(req); + return err; +} + +long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg) +{ + dout("ioctl file %p cmd %u arg %lu\n", file, cmd, arg); + switch (cmd) { + case CEPH_IOC_GET_LAYOUT: + return ceph_ioctl_get_layout(file, (void __user *)arg); + + case CEPH_IOC_SET_LAYOUT: + return ceph_ioctl_set_layout(file, (void __user *)arg); + } + return -ENOTTY; +} diff --git a/fs/ceph/ioctl.h b/fs/ceph/ioctl.h new file mode 100644 index 0000000..56f5e2c --- /dev/null +++ b/fs/ceph/ioctl.h @@ -0,0 +1,20 @@ +#ifndef FS_CEPH_IOCTL_H +#define FS_CEPH_IOCTL_H + +#include +#include + +#define CEPH_IOCTL_MAGIC 0x97 + +/* just use u64 to align sanely on all archs */ +struct ceph_ioctl_layout { + __u64 stripe_unit, stripe_count, object_size; + __u64 data_pool; +}; + +#define CEPH_IOC_GET_LAYOUT _IOR(CEPH_IOCTL_MAGIC, 1, \ + struct ceph_ioctl_layout) +#define CEPH_IOC_SET_LAYOUT _IOW(CEPH_IOCTL_MAGIC, 2, \ + struct ceph_ioctl_layout) + +#endif -- 1.5.6.5