1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Some non-inline ceph helpers 4 */ 5 #include <linux/module.h> 6 #include <linux/ceph/types.h> 7 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 { 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 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); 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 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 } 54 55 int 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 #endif 63 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_LAZY 77 if (flags & O_LAZY) 78 mode |= CEPH_FILE_MODE_LAZY; 79 #endif 80 81 return mode; 82 } 83 84 int 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