[linux.git] / fs / ceph / util.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Some non-inline ceph helpers
 */
#include <linux/module.h>
#include <linux/ceph/types.h>

/*
 * return true if @layout appears to be valid
 */
int ceph_file_layout_is_valid(const struct ceph_file_layout *layout)
{
	__u32 su = layout->stripe_unit;
	__u32 sc = layout->stripe_count;
	__u32 os = layout->object_size;

	/* stripe unit, object size must be non-zero, 64k increment */
	if (!su || (su & (CEPH_MIN_STRIPE_UNIT-1)))
		return 0;
	if (!os || (os & (CEPH_MIN_STRIPE_UNIT-1)))
		return 0;
	/* object size must be a multiple of stripe unit */
	if (os < su || os % su)
		return 0;
	/* stripe count must be non-zero */
	if (!sc)
		return 0;
	return 1;
}

void ceph_file_layout_from_legacy(struct ceph_file_layout *fl,
				  struct ceph_file_layout_legacy *legacy)
{
	fl->stripe_unit = le32_to_cpu(legacy->fl_stripe_unit);
	fl->stripe_count = le32_to_cpu(legacy->fl_stripe_count);
	fl->object_size = le32_to_cpu(legacy->fl_object_size);
	fl->pool_id = le32_to_cpu(legacy->fl_pg_pool);
	if (fl->pool_id == 0 && fl->stripe_unit == 0 &&
	    fl->stripe_count == 0 && fl->object_size == 0)
		fl->pool_id = -1;
}

void ceph_file_layout_to_legacy(struct ceph_file_layout *fl,
				struct ceph_file_layout_legacy *legacy)
{
	legacy->fl_stripe_unit = cpu_to_le32(fl->stripe_unit);
	legacy->fl_stripe_count = cpu_to_le32(fl->stripe_count);
	legacy->fl_object_size = cpu_to_le32(fl->object_size);
	if (fl->pool_id >= 0)
		legacy->fl_pg_pool = cpu_to_le32(fl->pool_id);
	else
		legacy->fl_pg_pool = 0;
}

int ceph_flags_to_mode(int flags)
{
	int mode;

#ifdef O_DIRECTORY  /* fixme */
	if ((flags & O_DIRECTORY) == O_DIRECTORY)
		return CEPH_FILE_MODE_PIN;
#endif

	switch (flags & O_ACCMODE) {
	case O_WRONLY:
		mode = CEPH_FILE_MODE_WR;
		break;
	case O_RDONLY:
		mode = CEPH_FILE_MODE_RD;
		break;
	case O_RDWR:
	case O_ACCMODE: /* this is what the VFS does */
		mode = CEPH_FILE_MODE_RDWR;
		break;
	}
#ifdef O_LAZY
	if (flags & O_LAZY)
		mode |= CEPH_FILE_MODE_LAZY;
#endif

	return mode;
}

int ceph_caps_for_mode(int mode)
{
	int caps = CEPH_CAP_PIN;

	if (mode & CEPH_FILE_MODE_RD)
		caps |= CEPH_CAP_FILE_SHARED |
			CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE;
	if (mode & CEPH_FILE_MODE_WR)
		caps |= CEPH_CAP_FILE_EXCL |
			CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER |
			CEPH_CAP_AUTH_SHARED | CEPH_CAP_AUTH_EXCL |
			CEPH_CAP_XATTR_SHARED | CEPH_CAP_XATTR_EXCL;
	if (mode & CEPH_FILE_MODE_LAZY)
		caps |= CEPH_CAP_FILE_LAZYIO;

	return caps;
}
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
0dee3c28 SW	2	/*
	3	* Some non-inline ceph helpers
	4	*/
3d14c5d2 YS	5	#include <linux/module.h>
3d14c5d2 YS	6	#include <linux/ceph/types.h>
0dee3c28	7
752727a1 SW	8	/*
	9	* return true if @layout appears to be valid
	10	*/
	11	int ceph_file_layout_is_valid(const struct ceph_file_layout *layout)
	12	{
7627151e YZ	13	__u32 su = layout->stripe_unit;
	14	__u32 sc = layout->stripe_count;
	15	__u32 os = layout->object_size;
752727a1 SW	16
	17	/* stripe unit, object size must be non-zero, 64k increment */
	18	if (!su \|\| (su & (CEPH_MIN_STRIPE_UNIT-1)))
	19	return 0;
	20	if (!os \|\| (os & (CEPH_MIN_STRIPE_UNIT-1)))
	21	return 0;
	22	/* object size must be a multiple of stripe unit */
	23	if (os < su \|\| os % su)
	24	return 0;
	25	/* stripe count must be non-zero */
	26	if (!sc)
	27	return 0;
	28	return 1;
	29	}
	30
7627151e YZ	31	void ceph_file_layout_from_legacy(struct ceph_file_layout *fl,
	32	struct ceph_file_layout_legacy *legacy)
	33	{
	34	fl->stripe_unit = le32_to_cpu(legacy->fl_stripe_unit);
	35	fl->stripe_count = le32_to_cpu(legacy->fl_stripe_count);
	36	fl->object_size = le32_to_cpu(legacy->fl_object_size);
	37	fl->pool_id = le32_to_cpu(legacy->fl_pg_pool);
3890dce1 YZ	38	if (fl->pool_id == 0 && fl->stripe_unit == 0 &&
3890dce1 YZ	39	fl->stripe_count == 0 && fl->object_size == 0)
7627151e YZ	40	fl->pool_id = -1;
7627151e YZ	41	}
7627151e YZ	42
	43	void ceph_file_layout_to_legacy(struct ceph_file_layout *fl,
	44	struct ceph_file_layout_legacy *legacy)
	45	{
	46	legacy->fl_stripe_unit = cpu_to_le32(fl->stripe_unit);
	47	legacy->fl_stripe_count = cpu_to_le32(fl->stripe_count);
	48	legacy->fl_object_size = cpu_to_le32(fl->object_size);
	49	if (fl->pool_id >= 0)
	50	legacy->fl_pg_pool = cpu_to_le32(fl->pool_id);
	51	else
	52	legacy->fl_pg_pool = 0;
	53	}
752727a1	54
0dee3c28 SW	55	int ceph_flags_to_mode(int flags)
0dee3c28 SW	56	{
84d95092 SW	57	int mode;
84d95092 SW	58
0dee3c28 SW	59	#ifdef O_DIRECTORY /* fixme */
	60	if ((flags & O_DIRECTORY) == O_DIRECTORY)
	61	return CEPH_FILE_MODE_PIN;
	62	#endif
84d95092	63
38be7a79 SW	64	switch (flags & O_ACCMODE) {
38be7a79 SW	65	case O_WRONLY:
84d95092	66	mode = CEPH_FILE_MODE_WR;
38be7a79 SW	67	break;
38be7a79 SW	68	case O_RDONLY:
84d95092	69	mode = CEPH_FILE_MODE_RD;
38be7a79 SW	70	break;
	71	case O_RDWR:
	72	case O_ACCMODE: /* this is what the VFS does */
	73	mode = CEPH_FILE_MODE_RDWR;
	74	break;
	75	}
0dee3c28 SW	76	#ifdef O_LAZY
0dee3c28 SW	77	if (flags & O_LAZY)
84d95092	78	mode \|= CEPH_FILE_MODE_LAZY;
0dee3c28	79	#endif
0dee3c28	80
84d95092	81	return mode;
0dee3c28 SW	82	}
	83
	84	int ceph_caps_for_mode(int mode)
	85	{
84d95092 SW	86	int caps = CEPH_CAP_PIN;
	87
	88	if (mode & CEPH_FILE_MODE_RD)
	89	caps \|= CEPH_CAP_FILE_SHARED \|
0dee3c28	90	CEPH_CAP_FILE_RD \| CEPH_CAP_FILE_CACHE;
84d95092 SW	91	if (mode & CEPH_FILE_MODE_WR)
84d95092 SW	92	caps \|= CEPH_CAP_FILE_EXCL \|
0dee3c28 SW	93	CEPH_CAP_FILE_WR \| CEPH_CAP_FILE_BUFFER \|
	94	CEPH_CAP_AUTH_SHARED \| CEPH_CAP_AUTH_EXCL \|
	95	CEPH_CAP_XATTR_SHARED \| CEPH_CAP_XATTR_EXCL;
84d95092 SW	96	if (mode & CEPH_FILE_MODE_LAZY)
	97	caps \|= CEPH_CAP_FILE_LAZYIO;
	98
	99	return caps;
0dee3c28	100	}