Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755055AbZLCXhF (ORCPT ); Thu, 3 Dec 2009 18:37:05 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754900AbZLCXg6 (ORCPT ); Thu, 3 Dec 2009 18:36:58 -0500 Received: from cobra.newdream.net ([66.33.216.30]:36115 "EHLO cobra.newdream.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754446AbZLCXgU (ORCPT ); Thu, 3 Dec 2009 18:36:20 -0500 From: Sage Weil To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org Cc: Sage Weil Subject: [PATCH 22/24] ceph: ioctls Date: Thu, 3 Dec 2009 15:41:29 -0800 Message-Id: <1259883691-1042-23-git-send-email-sage@newdream.net> X-Mailer: git-send-email 1.6.5 In-Reply-To: <1259883691-1042-22-git-send-email-sage@newdream.net> References: <1259883691-1042-1-git-send-email-sage@newdream.net> <1259883691-1042-2-git-send-email-sage@newdream.net> <1259883691-1042-3-git-send-email-sage@newdream.net> <1259883691-1042-4-git-send-email-sage@newdream.net> <1259883691-1042-5-git-send-email-sage@newdream.net> <1259883691-1042-6-git-send-email-sage@newdream.net> <1259883691-1042-7-git-send-email-sage@newdream.net> <1259883691-1042-8-git-send-email-sage@newdream.net> <1259883691-1042-9-git-send-email-sage@newdream.net> <1259883691-1042-10-git-send-email-sage@newdream.net> <1259883691-1042-11-git-send-email-sage@newdream.net> <1259883691-1042-12-git-send-email-sage@newdream.net> <1259883691-1042-13-git-send-email-sage@newdream.net> <1259883691-1042-14-git-send-email-sage@newdream.net> <1259883691-1042-15-git-send-email-sage@newdream.net> <1259883691-1042-16-git-send-email-sage@newdream.net> <1259883691-1042-17-git-send-email-sage@newdream.net> <1259883691-1042-18-git-send-email-sage@newdream.net> <1259883691-1042-19-git-send-email-sage@newdream.net> <1259883691-1042-20-git-send-email-sage@newdream.net> <1259883691-1042-21-git-send-email-sage@newdream.net> <1259883691-1042-22-git-send-email-sage@newdream.net> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 7452 Lines: 245 A few Ceph ioctls for getting and setting file layout (striping) parameters, and learning the identity and network address of the OSD a given region of a file is stored on. Signed-off-by: Sage Weil --- Documentation/ioctl/ioctl-number.txt | 1 + fs/ceph/ioctl.c | 160 ++++++++++++++++++++++++++++++++++ fs/ceph/ioctl.h | 40 +++++++++ 3 files changed, 201 insertions(+), 0 deletions(-) create mode 100644 fs/ceph/ioctl.c create mode 100644 fs/ceph/ioctl.h diff --git a/Documentation/ioctl/ioctl-number.txt b/Documentation/ioctl/ioctl-number.txt index 9473749..91cfdd7 100644 --- a/Documentation/ioctl/ioctl-number.txt +++ b/Documentation/ioctl/ioctl-number.txt @@ -182,6 +182,7 @@ Code Seq# Include File Comments 0x90 00 drivers/cdrom/sbpcd.h 0x93 60-7F linux/auto_fs.h +0x97 00-7F fs/ceph/ioctl.h Ceph file system 0x99 00-0F 537-Addinboard driver 0xA0 all linux/sdp/sdp.h Industrial Device Project diff --git a/fs/ceph/ioctl.c b/fs/ceph/ioctl.c new file mode 100644 index 0000000..8a5bcae --- /dev/null +++ b/fs/ceph/ioctl.c @@ -0,0 +1,160 @@ +#include + +#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); + l.preferred_osd = + (s32)le32_to_cpu(ci->i_layout.fl_pg_preferred); + 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(l.preferred_osd); + + err = ceph_mdsc_do_request(mdsc, parent_inode, req); + ceph_mdsc_put_request(req); + return err; +} + +/* + * Return object name, size/offset information, and location (OSD + * number, network address) for a given file offset. + */ +static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg) +{ + struct ceph_ioctl_dataloc dl; + struct inode *inode = file->f_dentry->d_inode; + struct ceph_inode_info *ci = ceph_inode(inode); + struct ceph_osd_client *osdc = &ceph_client(inode->i_sb)->osdc; + u64 len = 1, olen; + u64 tmp; + struct ceph_object_layout ol; + struct ceph_pg pgid; + + /* copy and validate */ + if (copy_from_user(&dl, arg, sizeof(dl))) + return -EFAULT; + + down_read(&osdc->map_sem); + ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, &len, + &dl.object_no, &dl.object_offset, &olen); + dl.file_offset -= dl.object_offset; + dl.object_size = ceph_file_layout_object_size(ci->i_layout); + dl.block_size = ceph_file_layout_su(ci->i_layout); + + /* block_offset = object_offset % block_size */ + tmp = dl.object_offset; + dl.block_offset = do_div(tmp, dl.block_size); + + snprintf(dl.object_name, sizeof(dl.object_name), "%llx.%08llx", + ceph_ino(inode), dl.object_no); + ceph_calc_object_layout(&ol, dl.object_name, &ci->i_layout, + osdc->osdmap); + + pgid = ol.ol_pgid; + dl.osd = ceph_calc_pg_primary(osdc->osdmap, pgid); + if (dl.osd >= 0) { + struct ceph_entity_addr *a = + ceph_osd_addr(osdc->osdmap, dl.osd); + if (a) + memcpy(&dl.osd_addr, &a->in_addr, sizeof(dl.osd_addr)); + } else { + memset(&dl.osd_addr, 0, sizeof(dl.osd_addr)); + } + up_read(&osdc->map_sem); + + /* send result back to user */ + if (copy_to_user(arg, &dl, sizeof(dl))) + return -EFAULT; + + return 0; +} + +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); + + case CEPH_IOC_GET_DATALOC: + return ceph_ioctl_get_dataloc(file, (void __user *)arg); + } + return -ENOTTY; +} diff --git a/fs/ceph/ioctl.h b/fs/ceph/ioctl.h new file mode 100644 index 0000000..25e4f1a --- /dev/null +++ b/fs/ceph/ioctl.h @@ -0,0 +1,40 @@ +#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; + __s64 preferred_osd; +}; + +#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) + +/* + * Extract identity, address of the OSD and object storing a given + * file offset. + */ +struct ceph_ioctl_dataloc { + __u64 file_offset; /* in+out: file offset */ + __u64 object_offset; /* out: offset in object */ + __u64 object_no; /* out: object # */ + __u64 object_size; /* out: object size */ + char object_name[64]; /* out: object name */ + __u64 block_offset; /* out: offset in block */ + __u64 block_size; /* out: block length */ + __s64 osd; /* out: osd # */ + struct sockaddr_storage osd_addr; /* out: osd address */ +}; + +#define CEPH_IOC_GET_DATALOC _IOWR(CEPH_IOCTL_MAGIC, 3, \ + struct ceph_ioctl_dataloc) + +#endif -- 1.6.5 -- 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/