[GitHub/mt8127/android_kernel_alcatel_ttab.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_inode(file));
	struct ceph_ioctl_layout l;
	int err;

	err = ceph_do_getattr(file_inode(file), 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)-1;
		if (copy_to_user(arg, &l, sizeof(l)))
			return -EFAULT;
	}

	return err;
}

static long __validate_layout(struct ceph_mds_client *mdsc,
			      struct ceph_ioctl_layout *l)
{
	int i, err;

	/* validate striping parameters */
	if ((l->object_size & ~PAGE_MASK) ||
	    (l->stripe_unit & ~PAGE_MASK) ||
	    (l->stripe_unit != 0 &&
	     ((unsigned)l->object_size % (unsigned)l->stripe_unit)))
		return -EINVAL;

	/* make sure it's a valid data pool */
	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;

	return 0;
}

static long ceph_ioctl_set_layout(struct file *file, void __user *arg)
{
	struct inode *inode = file_inode(file);
	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;
	struct ceph_inode_info *ci = ceph_inode(file_inode(file));
	struct ceph_ioctl_layout nl;
	int err;

	if (copy_from_user(&l, arg, sizeof(l)))
		return -EFAULT;

	/* validate changed params against current layout */
	err = ceph_do_getattr(file_inode(file), CEPH_STAT_CAP_LAYOUT);
	if (err)
		return err;

	memset(&nl, 0, sizeof(nl));
	if (l.stripe_count)
		nl.stripe_count = l.stripe_count;
	else
		nl.stripe_count = ceph_file_layout_stripe_count(ci->i_layout);
	if (l.stripe_unit)
		nl.stripe_unit = l.stripe_unit;
	else
		nl.stripe_unit = ceph_file_layout_su(ci->i_layout);
	if (l.object_size)
		nl.object_size = l.object_size;
	else
		nl.object_size = ceph_file_layout_object_size(ci->i_layout);
	if (l.data_pool)
		nl.data_pool = l.data_pool;
	else
		nl.data_pool = ceph_file_layout_pg_pool(ci->i_layout);

	/* this is obsolete, and always -1 */
	nl.preferred_osd = le64_to_cpu(-1);

	err = __validate_layout(mdsc, &nl);
	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);

	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_inode(file);
	struct ceph_mds_request *req;
	struct ceph_ioctl_layout l;
	int err;
	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;

	err = __validate_layout(mdsc, &l);
	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);

	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_inode(file);
	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_pg pgid;
	int r;

	/* copy and validate */
	if (copy_from_user(&dl, arg, sizeof(dl)))
		return -EFAULT;

	down_read(&osdc->map_sem);
	r = ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, len,
					  &dl.object_no, &dl.object_offset,
					  &olen);
	if (r < 0)
		return -EIO;
	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_ceph_pg(&pgid, dl.object_name, osdc->osdmap,
		ceph_file_layout_pg_pool(ci->i_layout));

	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_inode(file);
	struct ceph_inode_info *ci = ceph_inode(inode);

	if ((fi->fmode & CEPH_FILE_MODE_LAZY) == 0) {
		spin_lock(&ci->i_ceph_lock);
		ci->i_nr_by_mode[fi->fmode]--;
		fi->fmode |= CEPH_FILE_MODE_LAZY;
		ci->i_nr_by_mode[fi->fmode]++;
		spin_unlock(&ci->i_ceph_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	{
496ad9aa	19	struct ceph_inode_info *ci = ceph_inode(file_inode(file));
8f4e91de SW	20	struct ceph_ioctl_layout l;
	21	int err;
	22
496ad9aa	23	err = ceph_do_getattr(file_inode(file), CEPH_STAT_CAP_LAYOUT);
8f4e91de SW	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);
3469ac1a	29	l.preferred_osd = (s32)-1;
8f4e91de SW	30	if (copy_to_user(arg, &l, sizeof(l)))
	31	return -EFAULT;
	32	}
	33
	34	return err;
	35	}
	36
e49bf4c5 SW	37	static long __validate_layout(struct ceph_mds_client *mdsc,
	38	struct ceph_ioctl_layout *l)
	39	{
	40	int i, err;
	41
e49bf4c5 SW	42	/* validate striping parameters */
	43	if ((l->object_size & ~PAGE_MASK) \|\|
	44	(l->stripe_unit & ~PAGE_MASK) \|\|
45f2e081 SW	45	(l->stripe_unit != 0 &&
45f2e081 SW	46	((unsigned)l->object_size % (unsigned)l->stripe_unit)))
e49bf4c5 SW	47	return -EINVAL;
	48
	49	/* make sure it's a valid data pool */
	50	mutex_lock(&mdsc->mutex);
	51	err = -EINVAL;
	52	for (i = 0; i < mdsc->mdsmap->m_num_data_pg_pools; i++)
	53	if (mdsc->mdsmap->m_data_pg_pools[i] == l->data_pool) {
	54	err = 0;
	55	break;
	56	}
	57	mutex_unlock(&mdsc->mutex);
	58	if (err)
	59	return err;
	60
	61	return 0;
	62	}
	63
8f4e91de SW	64	static long ceph_ioctl_set_layout(struct file file, void __user arg)
8f4e91de SW	65	{
496ad9aa	66	struct inode *inode = file_inode(file);
5f21c96d	67	struct inode *parent_inode;
3d14c5d2	68	struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
8f4e91de SW	69	struct ceph_mds_request *req;
8f4e91de SW	70	struct ceph_ioctl_layout l;
496ad9aa	71	struct ceph_inode_info *ci = ceph_inode(file_inode(file));
a35eca95	72	struct ceph_ioctl_layout nl;
e49bf4c5	73	int err;
8f4e91de	74
8f4e91de SW	75	if (copy_from_user(&l, arg, sizeof(l)))
	76	return -EFAULT;
	77
a35eca95	78	/* validate changed params against current layout */
496ad9aa	79	err = ceph_do_getattr(file_inode(file), CEPH_STAT_CAP_LAYOUT);
702aeb1f	80	if (err)
a35eca95 GF	81	return err;
a35eca95 GF	82
702aeb1f	83	memset(&nl, 0, sizeof(nl));
a35eca95 GF	84	if (l.stripe_count)
a35eca95 GF	85	nl.stripe_count = l.stripe_count;
702aeb1f SW	86	else
702aeb1f SW	87	nl.stripe_count = ceph_file_layout_stripe_count(ci->i_layout);
a35eca95 GF	88	if (l.stripe_unit)
a35eca95 GF	89	nl.stripe_unit = l.stripe_unit;
702aeb1f SW	90	else
702aeb1f SW	91	nl.stripe_unit = ceph_file_layout_su(ci->i_layout);
a35eca95 GF	92	if (l.object_size)
a35eca95 GF	93	nl.object_size = l.object_size;
702aeb1f SW	94	else
702aeb1f SW	95	nl.object_size = ceph_file_layout_object_size(ci->i_layout);
a35eca95 GF	96	if (l.data_pool)
a35eca95 GF	97	nl.data_pool = l.data_pool;
702aeb1f SW	98	else
	99	nl.data_pool = ceph_file_layout_pg_pool(ci->i_layout);
	100
	101	/* this is obsolete, and always -1 */
	102	nl.preferred_osd = le64_to_cpu(-1);
a35eca95	103
e49bf4c5 SW	104	err = __validate_layout(mdsc, &nl);
	105	if (err)
	106	return err;
8f4e91de SW	107
	108	req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETLAYOUT,
	109	USE_AUTH_MDS);
	110	if (IS_ERR(req))
	111	return PTR_ERR(req);
70b666c3 SW	112	req->r_inode = inode;
70b666c3 SW	113	ihold(inode);
8f4e91de SW	114	req->r_inode_drop = CEPH_CAP_FILE_SHARED \| CEPH_CAP_FILE_EXCL;
	115
	116	req->r_args.setlayout.layout.fl_stripe_unit =
	117	cpu_to_le32(l.stripe_unit);
	118	req->r_args.setlayout.layout.fl_stripe_count =
	119	cpu_to_le32(l.stripe_count);
	120	req->r_args.setlayout.layout.fl_object_size =
	121	cpu_to_le32(l.object_size);
	122	req->r_args.setlayout.layout.fl_pg_pool = cpu_to_le32(l.data_pool);
8f4e91de	123
5f21c96d	124	parent_inode = ceph_get_dentry_parent_inode(file->f_dentry);
8f4e91de	125	err = ceph_mdsc_do_request(mdsc, parent_inode, req);
5f21c96d	126	iput(parent_inode);
8f4e91de SW	127	ceph_mdsc_put_request(req);
	128	return err;
	129	}
	130
571dba52 GF	131	/*
	132	* Set a layout policy on a directory inode. All items in the tree
	133	* rooted at this inode will inherit this layout on creation,
	134	* (It doesn't apply retroactively )
	135	* unless a subdirectory has its own layout policy.
	136	*/
	137	static long ceph_ioctl_set_layout_policy (struct file file, void __user arg)
	138	{
496ad9aa	139	struct inode *inode = file_inode(file);
571dba52 GF	140	struct ceph_mds_request *req;
571dba52 GF	141	struct ceph_ioctl_layout l;
e49bf4c5	142	int err;
571dba52 GF	143	struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
	144
	145	/* copy and validate */
	146	if (copy_from_user(&l, arg, sizeof(l)))
	147	return -EFAULT;
	148
e49bf4c5 SW	149	err = __validate_layout(mdsc, &l);
	150	if (err)
	151	return err;
571dba52 GF	152
	153	req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETDIRLAYOUT,
	154	USE_AUTH_MDS);
	155
	156	if (IS_ERR(req))
	157	return PTR_ERR(req);
70b666c3 SW	158	req->r_inode = inode;
70b666c3 SW	159	ihold(inode);
571dba52 GF	160
	161	req->r_args.setlayout.layout.fl_stripe_unit =
	162	cpu_to_le32(l.stripe_unit);
	163	req->r_args.setlayout.layout.fl_stripe_count =
	164	cpu_to_le32(l.stripe_count);
	165	req->r_args.setlayout.layout.fl_object_size =
	166	cpu_to_le32(l.object_size);
	167	req->r_args.setlayout.layout.fl_pg_pool =
	168	cpu_to_le32(l.data_pool);
571dba52 GF	169
	170	err = ceph_mdsc_do_request(mdsc, inode, req);
	171	ceph_mdsc_put_request(req);
	172	return err;
	173	}
	174
8f4e91de SW	175	/*
	176	* Return object name, size/offset information, and location (OSD
	177	* number, network address) for a given file offset.
	178	*/
	179	static long ceph_ioctl_get_dataloc(struct file file, void __user arg)
	180	{
	181	struct ceph_ioctl_dataloc dl;
496ad9aa	182	struct inode *inode = file_inode(file);
8f4e91de	183	struct ceph_inode_info *ci = ceph_inode(inode);
3d14c5d2 YS	184	struct ceph_osd_client *osdc =
3d14c5d2 YS	185	&ceph_sb_to_client(inode->i_sb)->client->osdc;
8f4e91de SW	186	u64 len = 1, olen;
8f4e91de SW	187	u64 tmp;
51042122	188	struct ceph_pg pgid;
457712a0	189	int r;
8f4e91de SW	190
	191	/* copy and validate */
	192	if (copy_from_user(&dl, arg, sizeof(dl)))
	193	return -EFAULT;
	194
	195	down_read(&osdc->map_sem);
e8afad65	196	r = ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, len,
457712a0 SW	197	&dl.object_no, &dl.object_offset,
	198	&olen);
	199	if (r < 0)
	200	return -EIO;
8f4e91de SW	201	dl.file_offset -= dl.object_offset;
	202	dl.object_size = ceph_file_layout_object_size(ci->i_layout);
	203	dl.block_size = ceph_file_layout_su(ci->i_layout);
	204
	205	/* block_offset = object_offset % block_size */
	206	tmp = dl.object_offset;
	207	dl.block_offset = do_div(tmp, dl.block_size);
	208
	209	snprintf(dl.object_name, sizeof(dl.object_name), "%llx.%08llx",
	210	ceph_ino(inode), dl.object_no);
41766f87 AE	211
	212	ceph_calc_ceph_pg(&pgid, dl.object_name, osdc->osdmap,
	213	ceph_file_layout_pg_pool(ci->i_layout));
8f4e91de	214
8f4e91de SW	215	dl.osd = ceph_calc_pg_primary(osdc->osdmap, pgid);
	216	if (dl.osd >= 0) {
	217	struct ceph_entity_addr *a =
	218	ceph_osd_addr(osdc->osdmap, dl.osd);
	219	if (a)
	220	memcpy(&dl.osd_addr, &a->in_addr, sizeof(dl.osd_addr));
	221	} else {
	222	memset(&dl.osd_addr, 0, sizeof(dl.osd_addr));
	223	}
	224	up_read(&osdc->map_sem);
	225
	226	/* send result back to user */
	227	if (copy_to_user(arg, &dl, sizeof(dl)))
	228	return -EFAULT;
	229
	230	return 0;
	231	}
	232
8c6e9229 SW	233	static long ceph_ioctl_lazyio(struct file *file)
	234	{
	235	struct ceph_file_info *fi = file->private_data;
496ad9aa	236	struct inode *inode = file_inode(file);
8c6e9229 SW	237	struct ceph_inode_info *ci = ceph_inode(inode);
	238
	239	if ((fi->fmode & CEPH_FILE_MODE_LAZY) == 0) {
be655596	240	spin_lock(&ci->i_ceph_lock);
8c6e9229 SW	241	ci->i_nr_by_mode[fi->fmode]--;
	242	fi->fmode \|= CEPH_FILE_MODE_LAZY;
	243	ci->i_nr_by_mode[fi->fmode]++;
be655596	244	spin_unlock(&ci->i_ceph_lock);
8c6e9229 SW	245	dout("ioctl_layzio: file %p marked lazy\n", file);
	246
	247	ceph_check_caps(ci, 0, NULL);
	248	} else {
	249	dout("ioctl_layzio: file %p already lazy\n", file);
	250	}
	251	return 0;
	252	}
	253
4918b6d1 SW	254	static long ceph_ioctl_syncio(struct file *file)
	255	{
	256	struct ceph_file_info *fi = file->private_data;
	257
	258	fi->flags \|= CEPH_F_SYNC;
	259	return 0;
	260	}
	261
8f4e91de SW	262	long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
	263	{
	264	dout("ioctl file %p cmd %u arg %lu\n", file, cmd, arg);
	265	switch (cmd) {
	266	case CEPH_IOC_GET_LAYOUT:
	267	return ceph_ioctl_get_layout(file, (void __user *)arg);
	268
	269	case CEPH_IOC_SET_LAYOUT:
	270	return ceph_ioctl_set_layout(file, (void __user *)arg);
	271
571dba52 GF	272	case CEPH_IOC_SET_LAYOUT_POLICY:
	273	return ceph_ioctl_set_layout_policy(file, (void __user *)arg);
	274
8f4e91de SW	275	case CEPH_IOC_GET_DATALOC:
8f4e91de SW	276	return ceph_ioctl_get_dataloc(file, (void __user *)arg);
8c6e9229 SW	277
	278	case CEPH_IOC_LAZYIO:
	279	return ceph_ioctl_lazyio(file);
4918b6d1 SW	280
	281	case CEPH_IOC_SYNCIO:
	282	return ceph_ioctl_syncio(file);
8f4e91de	283	}
571dba52	284
8f4e91de SW	285	return -ENOTTY;
8f4e91de SW	286	}