1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/ceph/ceph_debug.h> 3 #include <linux/in.h> 4 5 #include "super.h" 6 #include "mds_client.h" 7 #include "ioctl.h" 8 #include <linux/ceph/striper.h> 9 10 /* 11 * ioctls 12 */ 13 14 /* 15 * get and set the file layout 16 */ 17 static long ceph_ioctl_get_layout(struct file *file, void __user *arg) 18 { 19 struct ceph_inode_info *ci = ceph_inode(file_inode(file)); 20 struct ceph_ioctl_layout l; 21 int err; 22 23 err = ceph_do_getattr(file_inode(file), CEPH_STAT_CAP_LAYOUT, false); 24 if (!err) { 25 l.stripe_unit = ci->i_layout.stripe_unit; 26 l.stripe_count = ci->i_layout.stripe_count; 27 l.object_size = ci->i_layout.object_size; 28 l.data_pool = ci->i_layout.pool_id; 29 l.preferred_osd = -1; 30 if (copy_to_user(arg, &l, sizeof(l))) 31 return -EFAULT; 32 } 33 34 return err; 35 } 36 37 static long __validate_layout(struct ceph_mds_client *mdsc, 38 struct ceph_ioctl_layout *l) 39 { 40 int i, err; 41 42 /* validate striping parameters */ 43 if ((l->object_size & ~PAGE_MASK) || 44 (l->stripe_unit & ~PAGE_MASK) || 45 ((unsigned)l->stripe_unit != 0 && 46 ((unsigned)l->object_size % (unsigned)l->stripe_unit))) 47 return -EINVAL; 48 49 /* make sure it's a valid data pool */ 50 mutex_lock(&mdsc->mutex); 51 err = -EINVAL; 52 for (i = 0; i < mdsc->mdsmap->m_num_data_pg_pools; i++) 53 if (mdsc->mdsmap->m_data_pg_pools[i] == l->data_pool) { 54 err = 0; 55 break; 56 } 57 mutex_unlock(&mdsc->mutex); 58 if (err) 59 return err; 60 61 return 0; 62 } 63 64 static long ceph_ioctl_set_layout(struct file *file, void __user *arg) 65 { 66 struct inode *inode = file_inode(file); 67 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; 68 struct ceph_mds_request *req; 69 struct ceph_ioctl_layout l; 70 struct ceph_inode_info *ci = ceph_inode(file_inode(file)); 71 struct ceph_ioctl_layout nl; 72 int err; 73 74 if (copy_from_user(&l, arg, sizeof(l))) 75 return -EFAULT; 76 77 /* validate changed params against current layout */ 78 err = ceph_do_getattr(file_inode(file), CEPH_STAT_CAP_LAYOUT, false); 79 if (err) 80 return err; 81 82 memset(&nl, 0, sizeof(nl)); 83 if (l.stripe_count) 84 nl.stripe_count = l.stripe_count; 85 else 86 nl.stripe_count = ci->i_layout.stripe_count; 87 if (l.stripe_unit) 88 nl.stripe_unit = l.stripe_unit; 89 else 90 nl.stripe_unit = ci->i_layout.stripe_unit; 91 if (l.object_size) 92 nl.object_size = l.object_size; 93 else 94 nl.object_size = ci->i_layout.object_size; 95 if (l.data_pool) 96 nl.data_pool = l.data_pool; 97 else 98 nl.data_pool = ci->i_layout.pool_id; 99 100 /* this is obsolete, and always -1 */ 101 nl.preferred_osd = -1; 102 103 err = __validate_layout(mdsc, &nl); 104 if (err) 105 return err; 106 107 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETLAYOUT, 108 USE_AUTH_MDS); 109 if (IS_ERR(req)) 110 return PTR_ERR(req); 111 req->r_inode = inode; 112 ihold(inode); 113 req->r_num_caps = 1; 114 115 req->r_inode_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL; 116 117 req->r_args.setlayout.layout.fl_stripe_unit = 118 cpu_to_le32(l.stripe_unit); 119 req->r_args.setlayout.layout.fl_stripe_count = 120 cpu_to_le32(l.stripe_count); 121 req->r_args.setlayout.layout.fl_object_size = 122 cpu_to_le32(l.object_size); 123 req->r_args.setlayout.layout.fl_pg_pool = cpu_to_le32(l.data_pool); 124 125 err = ceph_mdsc_do_request(mdsc, NULL, req); 126 ceph_mdsc_put_request(req); 127 return err; 128 } 129 130 /* 131 * Set a layout policy on a directory inode. All items in the tree 132 * rooted at this inode will inherit this layout on creation, 133 * (It doesn't apply retroactively ) 134 * unless a subdirectory has its own layout policy. 135 */ 136 static long ceph_ioctl_set_layout_policy (struct file *file, void __user *arg) 137 { 138 struct inode *inode = file_inode(file); 139 struct ceph_mds_request *req; 140 struct ceph_ioctl_layout l; 141 int err; 142 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; 143 144 /* copy and validate */ 145 if (copy_from_user(&l, arg, sizeof(l))) 146 return -EFAULT; 147 148 err = __validate_layout(mdsc, &l); 149 if (err) 150 return err; 151 152 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETDIRLAYOUT, 153 USE_AUTH_MDS); 154 155 if (IS_ERR(req)) 156 return PTR_ERR(req); 157 req->r_inode = inode; 158 ihold(inode); 159 req->r_num_caps = 1; 160 161 req->r_args.setlayout.layout.fl_stripe_unit = 162 cpu_to_le32(l.stripe_unit); 163 req->r_args.setlayout.layout.fl_stripe_count = 164 cpu_to_le32(l.stripe_count); 165 req->r_args.setlayout.layout.fl_object_size = 166 cpu_to_le32(l.object_size); 167 req->r_args.setlayout.layout.fl_pg_pool = 168 cpu_to_le32(l.data_pool); 169 170 err = ceph_mdsc_do_request(mdsc, inode, req); 171 ceph_mdsc_put_request(req); 172 return err; 173 } 174 175 /* 176 * Return object name, size/offset information, and location (OSD 177 * number, network address) for a given file offset. 178 */ 179 static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg) 180 { 181 struct ceph_ioctl_dataloc dl; 182 struct inode *inode = file_inode(file); 183 struct ceph_inode_info *ci = ceph_inode(inode); 184 struct ceph_osd_client *osdc = 185 &ceph_sb_to_client(inode->i_sb)->client->osdc; 186 struct ceph_object_locator oloc; 187 CEPH_DEFINE_OID_ONSTACK(oid); 188 u32 xlen; 189 u64 tmp; 190 struct ceph_pg pgid; 191 int r; 192 193 /* copy and validate */ 194 if (copy_from_user(&dl, arg, sizeof(dl))) 195 return -EFAULT; 196 197 down_read(&osdc->lock); 198 ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, 1, 199 &dl.object_no, &dl.object_offset, &xlen); 200 dl.file_offset -= dl.object_offset; 201 dl.object_size = ci->i_layout.object_size; 202 dl.block_size = ci->i_layout.stripe_unit; 203 204 /* block_offset = object_offset % block_size */ 205 tmp = dl.object_offset; 206 dl.block_offset = do_div(tmp, dl.block_size); 207 208 snprintf(dl.object_name, sizeof(dl.object_name), "%llx.%08llx", 209 ceph_ino(inode), dl.object_no); 210 211 oloc.pool = ci->i_layout.pool_id; 212 oloc.pool_ns = ceph_try_get_string(ci->i_layout.pool_ns); 213 ceph_oid_printf(&oid, "%s", dl.object_name); 214 215 r = ceph_object_locator_to_pg(osdc->osdmap, &oid, &oloc, &pgid); 216 217 ceph_oloc_destroy(&oloc); 218 if (r < 0) { 219 up_read(&osdc->lock); 220 return r; 221 } 222 223 dl.osd = ceph_pg_to_acting_primary(osdc->osdmap, &pgid); 224 if (dl.osd >= 0) { 225 struct ceph_entity_addr *a = 226 ceph_osd_addr(osdc->osdmap, dl.osd); 227 if (a) 228 memcpy(&dl.osd_addr, &a->in_addr, sizeof(dl.osd_addr)); 229 } else { 230 memset(&dl.osd_addr, 0, sizeof(dl.osd_addr)); 231 } 232 up_read(&osdc->lock); 233 234 /* send result back to user */ 235 if (copy_to_user(arg, &dl, sizeof(dl))) 236 return -EFAULT; 237 238 return 0; 239 } 240 241 static long ceph_ioctl_lazyio(struct file *file) 242 { 243 struct ceph_file_info *fi = file->private_data; 244 struct inode *inode = file_inode(file); 245 struct ceph_inode_info *ci = ceph_inode(inode); 246 247 if ((fi->fmode & CEPH_FILE_MODE_LAZY) == 0) { 248 spin_lock(&ci->i_ceph_lock); 249 fi->fmode |= CEPH_FILE_MODE_LAZY; 250 ci->i_nr_by_mode[ffs(CEPH_FILE_MODE_LAZY)]++; 251 spin_unlock(&ci->i_ceph_lock); 252 dout("ioctl_layzio: file %p marked lazy\n", file); 253 254 ceph_check_caps(ci, 0, NULL); 255 } else { 256 dout("ioctl_layzio: file %p already lazy\n", file); 257 } 258 return 0; 259 } 260 261 static long ceph_ioctl_syncio(struct file *file) 262 { 263 struct ceph_file_info *fi = file->private_data; 264 265 fi->flags |= CEPH_F_SYNC; 266 return 0; 267 } 268 269 long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 270 { 271 dout("ioctl file %p cmd %u arg %lu\n", file, cmd, arg); 272 switch (cmd) { 273 case CEPH_IOC_GET_LAYOUT: 274 return ceph_ioctl_get_layout(file, (void __user *)arg); 275 276 case CEPH_IOC_SET_LAYOUT: 277 return ceph_ioctl_set_layout(file, (void __user *)arg); 278 279 case CEPH_IOC_SET_LAYOUT_POLICY: 280 return ceph_ioctl_set_layout_policy(file, (void __user *)arg); 281 282 case CEPH_IOC_GET_DATALOC: 283 return ceph_ioctl_get_dataloc(file, (void __user *)arg); 284 285 case CEPH_IOC_LAZYIO: 286 return ceph_ioctl_lazyio(file); 287 288 case CEPH_IOC_SYNCIO: 289 return ceph_ioctl_syncio(file); 290 } 291 292 return -ENOTTY; 293 } 294