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1// SPDX-License-Identifier: GPL-2.02/*3 * Some non-inline ceph helpers4 */5#include <linux/module.h>6#include <linux/ceph/types.h>7 8/*9 * return true if @layout appears to be valid10 */11int ceph_file_layout_is_valid(const struct ceph_file_layout *layout)12{13 __u32 su = layout->stripe_unit;14 __u32 sc = layout->stripe_count;15 __u32 os = layout->object_size;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 31void 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);38 if (fl->pool_id == 0 && fl->stripe_unit == 0 &&39 fl->stripe_count == 0 && fl->object_size == 0)40 fl->pool_id = -1;41}42 43void 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 else52 legacy->fl_pg_pool = 0;53}54 55int ceph_flags_to_mode(int flags)56{57 int mode;58 59#ifdef O_DIRECTORY /* fixme */60 if ((flags & O_DIRECTORY) == O_DIRECTORY)61 return CEPH_FILE_MODE_PIN;62#endif63 64 switch (flags & O_ACCMODE) {65 case O_WRONLY:66 mode = CEPH_FILE_MODE_WR;67 break;68 case O_RDONLY:69 mode = CEPH_FILE_MODE_RD;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 }76#ifdef O_LAZY77 if (flags & O_LAZY)78 mode |= CEPH_FILE_MODE_LAZY;79#endif80 81 return mode;82}83 84int ceph_caps_for_mode(int mode)85{86 int caps = CEPH_CAP_PIN;87 88 if (mode & CEPH_FILE_MODE_RD)89 caps |= CEPH_CAP_FILE_SHARED |90 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE;91 if (mode & CEPH_FILE_MODE_WR)92 caps |= CEPH_CAP_FILE_EXCL |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;96 if (mode & CEPH_FILE_MODE_LAZY)97 caps |= CEPH_CAP_FILE_LAZYIO;98 99 return caps;100}101