[net-next-2.6.git] / fs / ceph / ioctl.c

#include <linux/in.h>

#include "super.h"
#include "mds_client.h"
#include <linux/ceph/ceph_debug.h>

#include "ioctl.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;
}

/*
 * Set a layout policy on a directory inode. All items in the tree
 * rooted at this inode will inherit this layout on creation,
 * (It doesn't apply retroactively )
 * unless a subdirectory has its own layout policy.
 */
static long ceph_ioctl_set_layout_policy (struct file *file, void __user *arg)
{
	struct inode *inode = file->f_dentry->d_inode;
	struct ceph_mds_request *req;
	struct ceph_ioctl_layout l;
	int err, i;
	struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;

	/* 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_SETDIRLAYOUT,
				       USE_AUTH_MDS);

	if (IS_ERR(req))
		return PTR_ERR(req);
	req->r_inode = igrab(inode);

	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, 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_sb_to_client(inode->i_sb)->client->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;
}

static long ceph_ioctl_lazyio(struct file *file)
{
	struct ceph_file_info *fi = file->private_data;
	struct inode *inode = file->f_dentry->d_inode;
	struct ceph_inode_info *ci = ceph_inode(inode);

	if ((fi->fmode & CEPH_FILE_MODE_LAZY) == 0) {
		spin_lock(&inode->i_lock);
		ci->i_nr_by_mode[fi->fmode]--;
		fi->fmode |= CEPH_FILE_MODE_LAZY;
		ci->i_nr_by_mode[fi->fmode]++;
		spin_unlock(&inode->i_lock);
		dout("ioctl_layzio: file %p marked lazy\n", file);

		ceph_check_caps(ci, 0, NULL);
	} else {
		dout("ioctl_layzio: file %p already lazy\n", file);
	}
	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_SET_LAYOUT_POLICY:
		return ceph_ioctl_set_layout_policy(file, (void __user *)arg);

	case CEPH_IOC_GET_DATALOC:
		return ceph_ioctl_get_dataloc(file, (void __user *)arg);

	case CEPH_IOC_LAZYIO:
		return ceph_ioctl_lazyio(file);
	}

	return -ENOTTY;
}
Commit	Line	Data
8f4e91de SW	1	#include <linux/in.h>
8f4e91de SW	2
8f4e91de	3	#include "super.h"
3d14c5d2 YS	4	#include "mds_client.h"
	5	#include <linux/ceph/ceph_debug.h>
	6
	7	#include "ioctl.h"
8f4e91de SW	8
	9
	10	/*
	11	* ioctls
	12	*/
	13
	14	/*
	15	* get and set the file layout
	16	*/
	17	static long ceph_ioctl_get_layout(struct file file, void __user arg)
	18	{
	19	struct ceph_inode_info *ci = ceph_inode(file->f_dentry->d_inode);
	20	struct ceph_ioctl_layout l;
	21	int err;
	22
	23	err = ceph_do_getattr(file->f_dentry->d_inode, CEPH_STAT_CAP_LAYOUT);
	24	if (!err) {
	25	l.stripe_unit = ceph_file_layout_su(ci->i_layout);
	26	l.stripe_count = ceph_file_layout_stripe_count(ci->i_layout);
	27	l.object_size = ceph_file_layout_object_size(ci->i_layout);
	28	l.data_pool = le32_to_cpu(ci->i_layout.fl_pg_pool);
33d4909c SW	29	l.preferred_osd =
33d4909c SW	30	(s32)le32_to_cpu(ci->i_layout.fl_pg_preferred);
8f4e91de SW	31	if (copy_to_user(arg, &l, sizeof(l)))
	32	return -EFAULT;
	33	}
	34
	35	return err;
	36	}
	37
	38	static long ceph_ioctl_set_layout(struct file file, void __user arg)
	39	{
	40	struct inode *inode = file->f_dentry->d_inode;
	41	struct inode *parent_inode = file->f_dentry->d_parent->d_inode;
3d14c5d2	42	struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
8f4e91de SW	43	struct ceph_mds_request *req;
	44	struct ceph_ioctl_layout l;
	45	int err, i;
	46
	47	/* copy and validate */
	48	if (copy_from_user(&l, arg, sizeof(l)))
	49	return -EFAULT;
	50
	51	if ((l.object_size & ~PAGE_MASK) \|\|
	52	(l.stripe_unit & ~PAGE_MASK) \|\|
	53	!l.stripe_unit \|\|
	54	(l.object_size &&
	55	(unsigned)l.object_size % (unsigned)l.stripe_unit))
	56	return -EINVAL;
	57
	58	/* make sure it's a valid data pool */
	59	if (l.data_pool > 0) {
	60	mutex_lock(&mdsc->mutex);
	61	err = -EINVAL;
	62	for (i = 0; i < mdsc->mdsmap->m_num_data_pg_pools; i++)
	63	if (mdsc->mdsmap->m_data_pg_pools[i] == l.data_pool) {
	64	err = 0;
	65	break;
	66	}
	67	mutex_unlock(&mdsc->mutex);
	68	if (err)
	69	return err;
	70	}
	71
	72	req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETLAYOUT,
	73	USE_AUTH_MDS);
	74	if (IS_ERR(req))
	75	return PTR_ERR(req);
	76	req->r_inode = igrab(inode);
	77	req->r_inode_drop = CEPH_CAP_FILE_SHARED \| CEPH_CAP_FILE_EXCL;
	78
	79	req->r_args.setlayout.layout.fl_stripe_unit =
	80	cpu_to_le32(l.stripe_unit);
	81	req->r_args.setlayout.layout.fl_stripe_count =
	82	cpu_to_le32(l.stripe_count);
	83	req->r_args.setlayout.layout.fl_object_size =
	84	cpu_to_le32(l.object_size);
	85	req->r_args.setlayout.layout.fl_pg_pool = cpu_to_le32(l.data_pool);
33d4909c SW	86	req->r_args.setlayout.layout.fl_pg_preferred =
33d4909c SW	87	cpu_to_le32(l.preferred_osd);
8f4e91de SW	88
	89	err = ceph_mdsc_do_request(mdsc, parent_inode, req);
	90	ceph_mdsc_put_request(req);
	91	return err;
	92	}
	93
571dba52 GF	94	/*
	95	* Set a layout policy on a directory inode. All items in the tree
	96	* rooted at this inode will inherit this layout on creation,
	97	* (It doesn't apply retroactively )
	98	* unless a subdirectory has its own layout policy.
	99	*/
	100	static long ceph_ioctl_set_layout_policy (struct file file, void __user arg)
	101	{
	102	struct inode *inode = file->f_dentry->d_inode;
	103	struct ceph_mds_request *req;
	104	struct ceph_ioctl_layout l;
	105	int err, i;
	106	struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
	107
	108	/* copy and validate */
	109	if (copy_from_user(&l, arg, sizeof(l)))
	110	return -EFAULT;
	111
	112	if ((l.object_size & ~PAGE_MASK) \|\|
	113	(l.stripe_unit & ~PAGE_MASK) \|\|
	114	!l.stripe_unit \|\|
	115	(l.object_size &&
	116	(unsigned)l.object_size % (unsigned)l.stripe_unit))
	117	return -EINVAL;
	118
	119	/* make sure it's a valid data pool */
	120	if (l.data_pool > 0) {
	121	mutex_lock(&mdsc->mutex);
	122	err = -EINVAL;
	123	for (i = 0; i < mdsc->mdsmap->m_num_data_pg_pools; i++)
	124	if (mdsc->mdsmap->m_data_pg_pools[i] == l.data_pool) {
	125	err = 0;
	126	break;
	127	}
	128	mutex_unlock(&mdsc->mutex);
	129	if (err)
	130	return err;
	131	}
	132
	133	req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETDIRLAYOUT,
	134	USE_AUTH_MDS);
	135
	136	if (IS_ERR(req))
	137	return PTR_ERR(req);
	138	req->r_inode = igrab(inode);
	139
	140	req->r_args.setlayout.layout.fl_stripe_unit =
	141	cpu_to_le32(l.stripe_unit);
	142	req->r_args.setlayout.layout.fl_stripe_count =
	143	cpu_to_le32(l.stripe_count);
	144	req->r_args.setlayout.layout.fl_object_size =
	145	cpu_to_le32(l.object_size);
	146	req->r_args.setlayout.layout.fl_pg_pool =
	147	cpu_to_le32(l.data_pool);
	148	req->r_args.setlayout.layout.fl_pg_preferred =
	149	cpu_to_le32(l.preferred_osd);
	150
	151	err = ceph_mdsc_do_request(mdsc, inode, req);
	152	ceph_mdsc_put_request(req);
	153	return err;
	154	}
	155
8f4e91de SW	156	/*
	157	* Return object name, size/offset information, and location (OSD
	158	* number, network address) for a given file offset.
	159	*/
	160	static long ceph_ioctl_get_dataloc(struct file file, void __user arg)
	161	{
	162	struct ceph_ioctl_dataloc dl;
	163	struct inode *inode = file->f_dentry->d_inode;
	164	struct ceph_inode_info *ci = ceph_inode(inode);
3d14c5d2 YS	165	struct ceph_osd_client *osdc =
3d14c5d2 YS	166	&ceph_sb_to_client(inode->i_sb)->client->osdc;
8f4e91de SW	167	u64 len = 1, olen;
	168	u64 tmp;
	169	struct ceph_object_layout ol;
51042122	170	struct ceph_pg pgid;
8f4e91de SW	171
	172	/* copy and validate */
	173	if (copy_from_user(&dl, arg, sizeof(dl)))
	174	return -EFAULT;
	175
	176	down_read(&osdc->map_sem);
	177	ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, &len,
	178	&dl.object_no, &dl.object_offset, &olen);
	179	dl.file_offset -= dl.object_offset;
	180	dl.object_size = ceph_file_layout_object_size(ci->i_layout);
	181	dl.block_size = ceph_file_layout_su(ci->i_layout);
	182
	183	/* block_offset = object_offset % block_size */
	184	tmp = dl.object_offset;
	185	dl.block_offset = do_div(tmp, dl.block_size);
	186
	187	snprintf(dl.object_name, sizeof(dl.object_name), "%llx.%08llx",
	188	ceph_ino(inode), dl.object_no);
	189	ceph_calc_object_layout(&ol, dl.object_name, &ci->i_layout,
	190	osdc->osdmap);
	191
51042122	192	pgid = ol.ol_pgid;
8f4e91de SW	193	dl.osd = ceph_calc_pg_primary(osdc->osdmap, pgid);
	194	if (dl.osd >= 0) {
	195	struct ceph_entity_addr *a =
	196	ceph_osd_addr(osdc->osdmap, dl.osd);
	197	if (a)
	198	memcpy(&dl.osd_addr, &a->in_addr, sizeof(dl.osd_addr));
	199	} else {
	200	memset(&dl.osd_addr, 0, sizeof(dl.osd_addr));
	201	}
	202	up_read(&osdc->map_sem);
	203
	204	/* send result back to user */
	205	if (copy_to_user(arg, &dl, sizeof(dl)))
	206	return -EFAULT;
	207
	208	return 0;
	209	}
	210
8c6e9229 SW	211	static long ceph_ioctl_lazyio(struct file *file)
	212	{
	213	struct ceph_file_info *fi = file->private_data;
	214	struct inode *inode = file->f_dentry->d_inode;
	215	struct ceph_inode_info *ci = ceph_inode(inode);
	216
	217	if ((fi->fmode & CEPH_FILE_MODE_LAZY) == 0) {
	218	spin_lock(&inode->i_lock);
	219	ci->i_nr_by_mode[fi->fmode]--;
	220	fi->fmode \|= CEPH_FILE_MODE_LAZY;
	221	ci->i_nr_by_mode[fi->fmode]++;
	222	spin_unlock(&inode->i_lock);
	223	dout("ioctl_layzio: file %p marked lazy\n", file);
	224
	225	ceph_check_caps(ci, 0, NULL);
	226	} else {
	227	dout("ioctl_layzio: file %p already lazy\n", file);
	228	}
	229	return 0;
	230	}
	231
8f4e91de SW	232	long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
	233	{
	234	dout("ioctl file %p cmd %u arg %lu\n", file, cmd, arg);
	235	switch (cmd) {
	236	case CEPH_IOC_GET_LAYOUT:
	237	return ceph_ioctl_get_layout(file, (void __user *)arg);
	238
	239	case CEPH_IOC_SET_LAYOUT:
	240	return ceph_ioctl_set_layout(file, (void __user *)arg);
	241
571dba52 GF	242	case CEPH_IOC_SET_LAYOUT_POLICY:
	243	return ceph_ioctl_set_layout_policy(file, (void __user *)arg);
	244
8f4e91de SW	245	case CEPH_IOC_GET_DATALOC:
8f4e91de SW	246	return ceph_ioctl_get_dataloc(file, (void __user *)arg);
8c6e9229 SW	247
	248	case CEPH_IOC_LAZYIO:
	249	return ceph_ioctl_lazyio(file);
8f4e91de	250	}
571dba52	251
8f4e91de SW	252	return -ENOTTY;
8f4e91de SW	253	}