[mirror_ubuntu-bionic-kernel.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;
	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 = inode;
	ihold(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);

	parent_inode = ceph_get_dentry_parent_inode(file->f_dentry);
	err = ceph_mdsc_do_request(mdsc, parent_inode, req);
	iput(parent_inode);
	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 = inode;
	ihold(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;
}

static long ceph_ioctl_syncio(struct file *file)
{
	struct ceph_file_info *fi = file->private_data;

	fi->flags |= CEPH_F_SYNC;
	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);

	case CEPH_IOC_SYNCIO:
		return ceph_ioctl_syncio(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;
5f21c96d	41	struct inode *parent_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);
70b666c3 SW	76	req->r_inode = inode;
70b666c3 SW	77	ihold(inode);
8f4e91de SW	78	req->r_inode_drop = CEPH_CAP_FILE_SHARED \| CEPH_CAP_FILE_EXCL;
	79
	80	req->r_args.setlayout.layout.fl_stripe_unit =
	81	cpu_to_le32(l.stripe_unit);
	82	req->r_args.setlayout.layout.fl_stripe_count =
	83	cpu_to_le32(l.stripe_count);
	84	req->r_args.setlayout.layout.fl_object_size =
	85	cpu_to_le32(l.object_size);
	86	req->r_args.setlayout.layout.fl_pg_pool = cpu_to_le32(l.data_pool);
33d4909c SW	87	req->r_args.setlayout.layout.fl_pg_preferred =
33d4909c SW	88	cpu_to_le32(l.preferred_osd);
8f4e91de	89
5f21c96d	90	parent_inode = ceph_get_dentry_parent_inode(file->f_dentry);
8f4e91de	91	err = ceph_mdsc_do_request(mdsc, parent_inode, req);
5f21c96d	92	iput(parent_inode);
8f4e91de SW	93	ceph_mdsc_put_request(req);
	94	return err;
	95	}
	96
571dba52 GF	97	/*
	98	* Set a layout policy on a directory inode. All items in the tree
	99	* rooted at this inode will inherit this layout on creation,
	100	* (It doesn't apply retroactively )
	101	* unless a subdirectory has its own layout policy.
	102	*/
	103	static long ceph_ioctl_set_layout_policy (struct file file, void __user arg)
	104	{
	105	struct inode *inode = file->f_dentry->d_inode;
	106	struct ceph_mds_request *req;
	107	struct ceph_ioctl_layout l;
	108	int err, i;
	109	struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
	110
	111	/* copy and validate */
	112	if (copy_from_user(&l, arg, sizeof(l)))
	113	return -EFAULT;
	114
	115	if ((l.object_size & ~PAGE_MASK) \|\|
	116	(l.stripe_unit & ~PAGE_MASK) \|\|
	117	!l.stripe_unit \|\|
	118	(l.object_size &&
	119	(unsigned)l.object_size % (unsigned)l.stripe_unit))
	120	return -EINVAL;
	121
	122	/* make sure it's a valid data pool */
	123	if (l.data_pool > 0) {
	124	mutex_lock(&mdsc->mutex);
	125	err = -EINVAL;
	126	for (i = 0; i < mdsc->mdsmap->m_num_data_pg_pools; i++)
	127	if (mdsc->mdsmap->m_data_pg_pools[i] == l.data_pool) {
	128	err = 0;
	129	break;
	130	}
	131	mutex_unlock(&mdsc->mutex);
	132	if (err)
	133	return err;
	134	}
	135
	136	req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETDIRLAYOUT,
	137	USE_AUTH_MDS);
	138
	139	if (IS_ERR(req))
	140	return PTR_ERR(req);
70b666c3 SW	141	req->r_inode = inode;
70b666c3 SW	142	ihold(inode);
571dba52 GF	143
	144	req->r_args.setlayout.layout.fl_stripe_unit =
	145	cpu_to_le32(l.stripe_unit);
	146	req->r_args.setlayout.layout.fl_stripe_count =
	147	cpu_to_le32(l.stripe_count);
	148	req->r_args.setlayout.layout.fl_object_size =
	149	cpu_to_le32(l.object_size);
	150	req->r_args.setlayout.layout.fl_pg_pool =
	151	cpu_to_le32(l.data_pool);
	152	req->r_args.setlayout.layout.fl_pg_preferred =
	153	cpu_to_le32(l.preferred_osd);
	154
	155	err = ceph_mdsc_do_request(mdsc, inode, req);
	156	ceph_mdsc_put_request(req);
	157	return err;
	158	}
	159
8f4e91de SW	160	/*
	161	* Return object name, size/offset information, and location (OSD
	162	* number, network address) for a given file offset.
	163	*/
	164	static long ceph_ioctl_get_dataloc(struct file file, void __user arg)
	165	{
	166	struct ceph_ioctl_dataloc dl;
	167	struct inode *inode = file->f_dentry->d_inode;
	168	struct ceph_inode_info *ci = ceph_inode(inode);
3d14c5d2 YS	169	struct ceph_osd_client *osdc =
3d14c5d2 YS	170	&ceph_sb_to_client(inode->i_sb)->client->osdc;
8f4e91de SW	171	u64 len = 1, olen;
	172	u64 tmp;
	173	struct ceph_object_layout ol;
51042122	174	struct ceph_pg pgid;
8f4e91de SW	175
	176	/* copy and validate */
	177	if (copy_from_user(&dl, arg, sizeof(dl)))
	178	return -EFAULT;
	179
	180	down_read(&osdc->map_sem);
	181	ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, &len,
	182	&dl.object_no, &dl.object_offset, &olen);
	183	dl.file_offset -= dl.object_offset;
	184	dl.object_size = ceph_file_layout_object_size(ci->i_layout);
	185	dl.block_size = ceph_file_layout_su(ci->i_layout);
	186
	187	/* block_offset = object_offset % block_size */
	188	tmp = dl.object_offset;
	189	dl.block_offset = do_div(tmp, dl.block_size);
	190
	191	snprintf(dl.object_name, sizeof(dl.object_name), "%llx.%08llx",
	192	ceph_ino(inode), dl.object_no);
	193	ceph_calc_object_layout(&ol, dl.object_name, &ci->i_layout,
	194	osdc->osdmap);
	195
51042122	196	pgid = ol.ol_pgid;
8f4e91de SW	197	dl.osd = ceph_calc_pg_primary(osdc->osdmap, pgid);
	198	if (dl.osd >= 0) {
	199	struct ceph_entity_addr *a =
	200	ceph_osd_addr(osdc->osdmap, dl.osd);
	201	if (a)
	202	memcpy(&dl.osd_addr, &a->in_addr, sizeof(dl.osd_addr));
	203	} else {
	204	memset(&dl.osd_addr, 0, sizeof(dl.osd_addr));
	205	}
	206	up_read(&osdc->map_sem);
	207
	208	/* send result back to user */
	209	if (copy_to_user(arg, &dl, sizeof(dl)))
	210	return -EFAULT;
	211
	212	return 0;
	213	}
	214
8c6e9229 SW	215	static long ceph_ioctl_lazyio(struct file *file)
	216	{
	217	struct ceph_file_info *fi = file->private_data;
	218	struct inode *inode = file->f_dentry->d_inode;
	219	struct ceph_inode_info *ci = ceph_inode(inode);
	220
	221	if ((fi->fmode & CEPH_FILE_MODE_LAZY) == 0) {
	222	spin_lock(&inode->i_lock);
	223	ci->i_nr_by_mode[fi->fmode]--;
	224	fi->fmode \|= CEPH_FILE_MODE_LAZY;
	225	ci->i_nr_by_mode[fi->fmode]++;
	226	spin_unlock(&inode->i_lock);
	227	dout("ioctl_layzio: file %p marked lazy\n", file);
	228
	229	ceph_check_caps(ci, 0, NULL);
	230	} else {
	231	dout("ioctl_layzio: file %p already lazy\n", file);
	232	}
	233	return 0;
	234	}
	235
4918b6d1 SW	236	static long ceph_ioctl_syncio(struct file *file)
	237	{
	238	struct ceph_file_info *fi = file->private_data;
	239
	240	fi->flags \|= CEPH_F_SYNC;
	241	return 0;
	242	}
	243
8f4e91de SW	244	long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
	245	{
	246	dout("ioctl file %p cmd %u arg %lu\n", file, cmd, arg);
	247	switch (cmd) {
	248	case CEPH_IOC_GET_LAYOUT:
	249	return ceph_ioctl_get_layout(file, (void __user *)arg);
	250
	251	case CEPH_IOC_SET_LAYOUT:
	252	return ceph_ioctl_set_layout(file, (void __user *)arg);
	253
571dba52 GF	254	case CEPH_IOC_SET_LAYOUT_POLICY:
	255	return ceph_ioctl_set_layout_policy(file, (void __user *)arg);
	256
8f4e91de SW	257	case CEPH_IOC_GET_DATALOC:
8f4e91de SW	258	return ceph_ioctl_get_dataloc(file, (void __user *)arg);
8c6e9229 SW	259
	260	case CEPH_IOC_LAZYIO:
	261	return ceph_ioctl_lazyio(file);
4918b6d1 SW	262
	263	case CEPH_IOC_SYNCIO:
	264	return ceph_ioctl_syncio(file);
8f4e91de	265	}
571dba52	266
8f4e91de SW	267	return -ENOTTY;
8f4e91de SW	268	}