Blame - net/ceph/ceph_fs.c - kernel/msm-4.9

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Sage Weil	0dee3c2	2009-10-06 11:31:06 -0700	[diff] [blame]	1	/*
				2	* Some non-inline ceph helpers
				3	*/
Yehuda Sadeh	3d14c5d	2010-04-06 15:14:15 -0700	[diff] [blame]	4	#include <linux/module.h>
				5	#include <linux/ceph/types.h>
Sage Weil	0dee3c2	2009-10-06 11:31:06 -0700	[diff] [blame]	6
Sage Weil	752727a	2009-10-09 16:38:45 -0700	[diff] [blame]	7	/*
				8	* return true if @layout appears to be valid
				9	*/
				10	int ceph_file_layout_is_valid(const struct ceph_file_layout *layout)
				11	{
				12	__u32 su = le32_to_cpu(layout->fl_stripe_unit);
				13	__u32 sc = le32_to_cpu(layout->fl_stripe_count);
				14	__u32 os = le32_to_cpu(layout->fl_object_size);
				15
				16	/* stripe unit, object size must be non-zero, 64k increment */
				17	if (!su \|\| (su & (CEPH_MIN_STRIPE_UNIT-1)))
				18	return 0;
				19	if (!os \|\| (os & (CEPH_MIN_STRIPE_UNIT-1)))
				20	return 0;
				21	/* object size must be a multiple of stripe unit */
				22	if (os < su \|\| os % su)
				23	return 0;
				24	/* stripe count must be non-zero */
				25	if (!sc)
				26	return 0;
				27	return 1;
				28	}
				29
				30
Sage Weil	0dee3c2	2009-10-06 11:31:06 -0700	[diff] [blame]	31	int ceph_flags_to_mode(int flags)
				32	{
Sage Weil	84d9509	2010-05-25 16:46:24 -0700	[diff] [blame]	33	int mode;
				34
Sage Weil	0dee3c2	2009-10-06 11:31:06 -0700	[diff] [blame]	35	#ifdef O_DIRECTORY /* fixme */
				36	if ((flags & O_DIRECTORY) == O_DIRECTORY)
				37	return CEPH_FILE_MODE_PIN;
				38	#endif
Sage Weil	0dee3c2	2009-10-06 11:31:06 -0700	[diff] [blame]	39
Sage Weil	38be7a7	2011-07-19 11:25:04 -0700	[diff] [blame]	40	switch (flags & O_ACCMODE) {
				41	case O_WRONLY:
Sage Weil	84d9509	2010-05-25 16:46:24 -0700	[diff] [blame]	42	mode = CEPH_FILE_MODE_WR;
Sage Weil	38be7a7	2011-07-19 11:25:04 -0700	[diff] [blame]	43	break;
				44	case O_RDONLY:
Sage Weil	84d9509	2010-05-25 16:46:24 -0700	[diff] [blame]	45	mode = CEPH_FILE_MODE_RD;
Sage Weil	38be7a7	2011-07-19 11:25:04 -0700	[diff] [blame]	46	break;
				47	case O_RDWR:
				48	case O_ACCMODE: /* this is what the VFS does */
				49	mode = CEPH_FILE_MODE_RDWR;
				50	break;
				51	}
Sage Weil	84d9509	2010-05-25 16:46:24 -0700	[diff] [blame]	52	#ifdef O_LAZY
				53	if (flags & O_LAZY)
				54	mode \|= CEPH_FILE_MODE_LAZY;
				55	#endif
				56
				57	return mode;
Sage Weil	0dee3c2	2009-10-06 11:31:06 -0700	[diff] [blame]	58	}
Yehuda Sadeh	3d14c5d	2010-04-06 15:14:15 -0700	[diff] [blame]	59	EXPORT_SYMBOL(ceph_flags_to_mode);
Sage Weil	0dee3c2	2009-10-06 11:31:06 -0700	[diff] [blame]	60
				61	int ceph_caps_for_mode(int mode)
				62	{
Sage Weil	84d9509	2010-05-25 16:46:24 -0700	[diff] [blame]	63	int caps = CEPH_CAP_PIN;
				64
				65	if (mode & CEPH_FILE_MODE_RD)
				66	caps \|= CEPH_CAP_FILE_SHARED \|
Sage Weil	0dee3c2	2009-10-06 11:31:06 -0700	[diff] [blame]	67	CEPH_CAP_FILE_RD \| CEPH_CAP_FILE_CACHE;
Sage Weil	84d9509	2010-05-25 16:46:24 -0700	[diff] [blame]	68	if (mode & CEPH_FILE_MODE_WR)
				69	caps \|= CEPH_CAP_FILE_EXCL \|
Sage Weil	0dee3c2	2009-10-06 11:31:06 -0700	[diff] [blame]	70	CEPH_CAP_FILE_WR \| CEPH_CAP_FILE_BUFFER \|
				71	CEPH_CAP_AUTH_SHARED \| CEPH_CAP_AUTH_EXCL \|
				72	CEPH_CAP_XATTR_SHARED \| CEPH_CAP_XATTR_EXCL;
Sage Weil	84d9509	2010-05-25 16:46:24 -0700	[diff] [blame]	73	if (mode & CEPH_FILE_MODE_LAZY)
				74	caps \|= CEPH_CAP_FILE_LAZYIO;
				75
				76	return caps;
Sage Weil	0dee3c2	2009-10-06 11:31:06 -0700	[diff] [blame]	77	}
Yehuda Sadeh	3d14c5d	2010-04-06 15:14:15 -0700	[diff] [blame]	78	EXPORT_SYMBOL(ceph_caps_for_mode);