[linux.git] / net / ceph / ceph_fs.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;
}
EXPORT_SYMBOL(ceph_file_layout_from_legacy);

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;
}
EXPORT_SYMBOL(ceph_file_layout_to_legacy);

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;
}
EXPORT_SYMBOL(ceph_flags_to_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;
}
EXPORT_SYMBOL(ceph_caps_for_mode);
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;
	41	}
	42	EXPORT_SYMBOL(ceph_file_layout_from_legacy);
	43
	44	void ceph_file_layout_to_legacy(struct ceph_file_layout *fl,
	45	struct ceph_file_layout_legacy *legacy)
	46	{
	47	legacy->fl_stripe_unit = cpu_to_le32(fl->stripe_unit);
	48	legacy->fl_stripe_count = cpu_to_le32(fl->stripe_count);
	49	legacy->fl_object_size = cpu_to_le32(fl->object_size);
	50	if (fl->pool_id >= 0)
	51	legacy->fl_pg_pool = cpu_to_le32(fl->pool_id);
	52	else
	53	legacy->fl_pg_pool = 0;
	54	}
	55	EXPORT_SYMBOL(ceph_file_layout_to_legacy);
752727a1	56
0dee3c28 SW	57	int ceph_flags_to_mode(int flags)
0dee3c28 SW	58	{
84d95092 SW	59	int mode;
84d95092 SW	60
0dee3c28 SW	61	#ifdef O_DIRECTORY /* fixme */
	62	if ((flags & O_DIRECTORY) == O_DIRECTORY)
	63	return CEPH_FILE_MODE_PIN;
	64	#endif
84d95092	65
38be7a79 SW	66	switch (flags & O_ACCMODE) {
38be7a79 SW	67	case O_WRONLY:
84d95092	68	mode = CEPH_FILE_MODE_WR;
38be7a79 SW	69	break;
38be7a79 SW	70	case O_RDONLY:
84d95092	71	mode = CEPH_FILE_MODE_RD;
38be7a79 SW	72	break;
	73	case O_RDWR:
	74	case O_ACCMODE: /* this is what the VFS does */
	75	mode = CEPH_FILE_MODE_RDWR;
	76	break;
	77	}
0dee3c28 SW	78	#ifdef O_LAZY
0dee3c28 SW	79	if (flags & O_LAZY)
84d95092	80	mode \|= CEPH_FILE_MODE_LAZY;
0dee3c28	81	#endif
0dee3c28	82
84d95092	83	return mode;
0dee3c28	84	}
3d14c5d2	85	EXPORT_SYMBOL(ceph_flags_to_mode);
0dee3c28 SW	86
	87	int ceph_caps_for_mode(int mode)
	88	{
84d95092 SW	89	int caps = CEPH_CAP_PIN;
	90
	91	if (mode & CEPH_FILE_MODE_RD)
	92	caps \|= CEPH_CAP_FILE_SHARED \|
0dee3c28	93	CEPH_CAP_FILE_RD \| CEPH_CAP_FILE_CACHE;
84d95092 SW	94	if (mode & CEPH_FILE_MODE_WR)
84d95092 SW	95	caps \|= CEPH_CAP_FILE_EXCL \|
0dee3c28 SW	96	CEPH_CAP_FILE_WR \| CEPH_CAP_FILE_BUFFER \|
	97	CEPH_CAP_AUTH_SHARED \| CEPH_CAP_AUTH_EXCL \|
	98	CEPH_CAP_XATTR_SHARED \| CEPH_CAP_XATTR_EXCL;
84d95092 SW	99	if (mode & CEPH_FILE_MODE_LAZY)
	100	caps \|= CEPH_CAP_FILE_LAZYIO;
	101
	102	return caps;
0dee3c28	103	}
3d14c5d2	104	EXPORT_SYMBOL(ceph_caps_for_mode);