1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Some non-inline ceph helpers 4*4882a593Smuzhiyun */ 5*4882a593Smuzhiyun #include <linux/module.h> 6*4882a593Smuzhiyun #include <linux/ceph/types.h> 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun /* 9*4882a593Smuzhiyun * return true if @layout appears to be valid 10*4882a593Smuzhiyun */ ceph_file_layout_is_valid(const struct ceph_file_layout * layout)11*4882a593Smuzhiyunint ceph_file_layout_is_valid(const struct ceph_file_layout *layout) 12*4882a593Smuzhiyun { 13*4882a593Smuzhiyun __u32 su = layout->stripe_unit; 14*4882a593Smuzhiyun __u32 sc = layout->stripe_count; 15*4882a593Smuzhiyun __u32 os = layout->object_size; 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun /* stripe unit, object size must be non-zero, 64k increment */ 18*4882a593Smuzhiyun if (!su || (su & (CEPH_MIN_STRIPE_UNIT-1))) 19*4882a593Smuzhiyun return 0; 20*4882a593Smuzhiyun if (!os || (os & (CEPH_MIN_STRIPE_UNIT-1))) 21*4882a593Smuzhiyun return 0; 22*4882a593Smuzhiyun /* object size must be a multiple of stripe unit */ 23*4882a593Smuzhiyun if (os < su || os % su) 24*4882a593Smuzhiyun return 0; 25*4882a593Smuzhiyun /* stripe count must be non-zero */ 26*4882a593Smuzhiyun if (!sc) 27*4882a593Smuzhiyun return 0; 28*4882a593Smuzhiyun return 1; 29*4882a593Smuzhiyun } 30*4882a593Smuzhiyun ceph_file_layout_from_legacy(struct ceph_file_layout * fl,struct ceph_file_layout_legacy * legacy)31*4882a593Smuzhiyunvoid ceph_file_layout_from_legacy(struct ceph_file_layout *fl, 32*4882a593Smuzhiyun struct ceph_file_layout_legacy *legacy) 33*4882a593Smuzhiyun { 34*4882a593Smuzhiyun fl->stripe_unit = le32_to_cpu(legacy->fl_stripe_unit); 35*4882a593Smuzhiyun fl->stripe_count = le32_to_cpu(legacy->fl_stripe_count); 36*4882a593Smuzhiyun fl->object_size = le32_to_cpu(legacy->fl_object_size); 37*4882a593Smuzhiyun fl->pool_id = le32_to_cpu(legacy->fl_pg_pool); 38*4882a593Smuzhiyun if (fl->pool_id == 0 && fl->stripe_unit == 0 && 39*4882a593Smuzhiyun fl->stripe_count == 0 && fl->object_size == 0) 40*4882a593Smuzhiyun fl->pool_id = -1; 41*4882a593Smuzhiyun } 42*4882a593Smuzhiyun ceph_file_layout_to_legacy(struct ceph_file_layout * fl,struct ceph_file_layout_legacy * legacy)43*4882a593Smuzhiyunvoid ceph_file_layout_to_legacy(struct ceph_file_layout *fl, 44*4882a593Smuzhiyun struct ceph_file_layout_legacy *legacy) 45*4882a593Smuzhiyun { 46*4882a593Smuzhiyun legacy->fl_stripe_unit = cpu_to_le32(fl->stripe_unit); 47*4882a593Smuzhiyun legacy->fl_stripe_count = cpu_to_le32(fl->stripe_count); 48*4882a593Smuzhiyun legacy->fl_object_size = cpu_to_le32(fl->object_size); 49*4882a593Smuzhiyun if (fl->pool_id >= 0) 50*4882a593Smuzhiyun legacy->fl_pg_pool = cpu_to_le32(fl->pool_id); 51*4882a593Smuzhiyun else 52*4882a593Smuzhiyun legacy->fl_pg_pool = 0; 53*4882a593Smuzhiyun } 54*4882a593Smuzhiyun ceph_flags_to_mode(int flags)55*4882a593Smuzhiyunint ceph_flags_to_mode(int flags) 56*4882a593Smuzhiyun { 57*4882a593Smuzhiyun int mode; 58*4882a593Smuzhiyun 59*4882a593Smuzhiyun #ifdef O_DIRECTORY /* fixme */ 60*4882a593Smuzhiyun if ((flags & O_DIRECTORY) == O_DIRECTORY) 61*4882a593Smuzhiyun return CEPH_FILE_MODE_PIN; 62*4882a593Smuzhiyun #endif 63*4882a593Smuzhiyun 64*4882a593Smuzhiyun switch (flags & O_ACCMODE) { 65*4882a593Smuzhiyun case O_WRONLY: 66*4882a593Smuzhiyun mode = CEPH_FILE_MODE_WR; 67*4882a593Smuzhiyun break; 68*4882a593Smuzhiyun case O_RDONLY: 69*4882a593Smuzhiyun mode = CEPH_FILE_MODE_RD; 70*4882a593Smuzhiyun break; 71*4882a593Smuzhiyun case O_RDWR: 72*4882a593Smuzhiyun case O_ACCMODE: /* this is what the VFS does */ 73*4882a593Smuzhiyun mode = CEPH_FILE_MODE_RDWR; 74*4882a593Smuzhiyun break; 75*4882a593Smuzhiyun } 76*4882a593Smuzhiyun #ifdef O_LAZY 77*4882a593Smuzhiyun if (flags & O_LAZY) 78*4882a593Smuzhiyun mode |= CEPH_FILE_MODE_LAZY; 79*4882a593Smuzhiyun #endif 80*4882a593Smuzhiyun 81*4882a593Smuzhiyun return mode; 82*4882a593Smuzhiyun } 83*4882a593Smuzhiyun ceph_caps_for_mode(int mode)84*4882a593Smuzhiyunint ceph_caps_for_mode(int mode) 85*4882a593Smuzhiyun { 86*4882a593Smuzhiyun int caps = CEPH_CAP_PIN; 87*4882a593Smuzhiyun 88*4882a593Smuzhiyun if (mode & CEPH_FILE_MODE_RD) 89*4882a593Smuzhiyun caps |= CEPH_CAP_FILE_SHARED | 90*4882a593Smuzhiyun CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE; 91*4882a593Smuzhiyun if (mode & CEPH_FILE_MODE_WR) 92*4882a593Smuzhiyun caps |= CEPH_CAP_FILE_EXCL | 93*4882a593Smuzhiyun CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER | 94*4882a593Smuzhiyun CEPH_CAP_AUTH_SHARED | CEPH_CAP_AUTH_EXCL | 95*4882a593Smuzhiyun CEPH_CAP_XATTR_SHARED | CEPH_CAP_XATTR_EXCL; 96*4882a593Smuzhiyun if (mode & CEPH_FILE_MODE_LAZY) 97*4882a593Smuzhiyun caps |= CEPH_CAP_FILE_LAZYIO; 98*4882a593Smuzhiyun 99*4882a593Smuzhiyun return caps; 100*4882a593Smuzhiyun } 101