1 #include <linux/in.h> 2 3 #include "super.h" 4 #include "mds_client.h" 5 #include <linux/ceph/ceph_debug.h> 6 7 #include "ioctl.h" 8 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->f_dentry->d_inode); 20 struct ceph_ioctl_layout l; 21 int err; 22 23 err = ceph_do_getattr(file->f_dentry->d_inode, CEPH_STAT_CAP_LAYOUT); 24 if (!err) { 25 l.stripe_unit = ceph_file_layout_su(ci->i_layout); 26 l.stripe_count = ceph_file_layout_stripe_count(ci->i_layout); 27 l.object_size = ceph_file_layout_object_size(ci->i_layout); 28 l.data_pool = le32_to_cpu(ci->i_layout.fl_pg_pool); 29 l.preferred_osd = 30 (s32)le32_to_cpu(ci->i_layout.fl_pg_preferred); 31 if (copy_to_user(arg, &l, sizeof(l))) 32 return -EFAULT; 33 } 34 35 return err; 36 } 37 38 static long ceph_ioctl_set_layout(struct file *file, void __user *arg) 39 { 40 struct inode *inode = file->f_dentry->d_inode; 41 struct inode *parent_inode; 42 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; 43 struct ceph_mds_request *req; 44 struct ceph_ioctl_layout l; 45 int err, i; 46 47 /* copy and validate */ 48 if (copy_from_user(&l, arg, sizeof(l))) 49 return -EFAULT; 50 51 if ((l.object_size & ~PAGE_MASK) || 52 (l.stripe_unit & ~PAGE_MASK) || 53 !l.stripe_unit || 54 (l.object_size && 55 (unsigned)l.object_size % (unsigned)l.stripe_unit)) 56 return -EINVAL; 57 58 /* make sure it's a valid data pool */ 59 if (l.data_pool > 0) { 60 mutex_lock(&mdsc->mutex); 61 err = -EINVAL; 62 for (i = 0; i < mdsc->mdsmap->m_num_data_pg_pools; i++) 63 if (mdsc->mdsmap->m_data_pg_pools[i] == l.data_pool) { 64 err = 0; 65 break; 66 } 67 mutex_unlock(&mdsc->mutex); 68 if (err) 69 return err; 70 } 71 72 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETLAYOUT, 73 USE_AUTH_MDS); 74 if (IS_ERR(req)) 75 return PTR_ERR(req); 76 req->r_inode = inode; 77 ihold(inode); 78 req->r_inode_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL; 79 80 req->r_args.setlayout.layout.fl_stripe_unit = 81 cpu_to_le32(l.stripe_unit); 82 req->r_args.setlayout.layout.fl_stripe_count = 83 cpu_to_le32(l.stripe_count); 84 req->r_args.setlayout.layout.fl_object_size = 85 cpu_to_le32(l.object_size); 86 req->r_args.setlayout.layout.fl_pg_pool = cpu_to_le32(l.data_pool); 87 req->r_args.setlayout.layout.fl_pg_preferred = 88 cpu_to_le32(l.preferred_osd); 89 90 parent_inode = ceph_get_dentry_parent_inode(file->f_dentry); 91 err = ceph_mdsc_do_request(mdsc, parent_inode, req); 92 iput(parent_inode); 93 ceph_mdsc_put_request(req); 94 return err; 95 } 96 97 /* 98 * Set a layout policy on a directory inode. All items in the tree 99 * rooted at this inode will inherit this layout on creation, 100 * (It doesn't apply retroactively ) 101 * unless a subdirectory has its own layout policy. 102 */ 103 static long ceph_ioctl_set_layout_policy (struct file *file, void __user *arg) 104 { 105 struct inode *inode = file->f_dentry->d_inode; 106 struct ceph_mds_request *req; 107 struct ceph_ioctl_layout l; 108 int err, i; 109 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; 110 111 /* copy and validate */ 112 if (copy_from_user(&l, arg, sizeof(l))) 113 return -EFAULT; 114 115 if ((l.object_size & ~PAGE_MASK) || 116 (l.stripe_unit & ~PAGE_MASK) || 117 !l.stripe_unit || 118 (l.object_size && 119 (unsigned)l.object_size % (unsigned)l.stripe_unit)) 120 return -EINVAL; 121 122 /* make sure it's a valid data pool */ 123 if (l.data_pool > 0) { 124 mutex_lock(&mdsc->mutex); 125 err = -EINVAL; 126 for (i = 0; i < mdsc->mdsmap->m_num_data_pg_pools; i++) 127 if (mdsc->mdsmap->m_data_pg_pools[i] == l.data_pool) { 128 err = 0; 129 break; 130 } 131 mutex_unlock(&mdsc->mutex); 132 if (err) 133 return err; 134 } 135 136 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETDIRLAYOUT, 137 USE_AUTH_MDS); 138 139 if (IS_ERR(req)) 140 return PTR_ERR(req); 141 req->r_inode = inode; 142 ihold(inode); 143 144 req->r_args.setlayout.layout.fl_stripe_unit = 145 cpu_to_le32(l.stripe_unit); 146 req->r_args.setlayout.layout.fl_stripe_count = 147 cpu_to_le32(l.stripe_count); 148 req->r_args.setlayout.layout.fl_object_size = 149 cpu_to_le32(l.object_size); 150 req->r_args.setlayout.layout.fl_pg_pool = 151 cpu_to_le32(l.data_pool); 152 req->r_args.setlayout.layout.fl_pg_preferred = 153 cpu_to_le32(l.preferred_osd); 154 155 err = ceph_mdsc_do_request(mdsc, inode, req); 156 ceph_mdsc_put_request(req); 157 return err; 158 } 159 160 /* 161 * Return object name, size/offset information, and location (OSD 162 * number, network address) for a given file offset. 163 */ 164 static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg) 165 { 166 struct ceph_ioctl_dataloc dl; 167 struct inode *inode = file->f_dentry->d_inode; 168 struct ceph_inode_info *ci = ceph_inode(inode); 169 struct ceph_osd_client *osdc = 170 &ceph_sb_to_client(inode->i_sb)->client->osdc; 171 u64 len = 1, olen; 172 u64 tmp; 173 struct ceph_object_layout ol; 174 struct ceph_pg pgid; 175 176 /* copy and validate */ 177 if (copy_from_user(&dl, arg, sizeof(dl))) 178 return -EFAULT; 179 180 down_read(&osdc->map_sem); 181 ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, &len, 182 &dl.object_no, &dl.object_offset, &olen); 183 dl.file_offset -= dl.object_offset; 184 dl.object_size = ceph_file_layout_object_size(ci->i_layout); 185 dl.block_size = ceph_file_layout_su(ci->i_layout); 186 187 /* block_offset = object_offset % block_size */ 188 tmp = dl.object_offset; 189 dl.block_offset = do_div(tmp, dl.block_size); 190 191 snprintf(dl.object_name, sizeof(dl.object_name), "%llx.%08llx", 192 ceph_ino(inode), dl.object_no); 193 ceph_calc_object_layout(&ol, dl.object_name, &ci->i_layout, 194 osdc->osdmap); 195 196 pgid = ol.ol_pgid; 197 dl.osd = ceph_calc_pg_primary(osdc->osdmap, pgid); 198 if (dl.osd >= 0) { 199 struct ceph_entity_addr *a = 200 ceph_osd_addr(osdc->osdmap, dl.osd); 201 if (a) 202 memcpy(&dl.osd_addr, &a->in_addr, sizeof(dl.osd_addr)); 203 } else { 204 memset(&dl.osd_addr, 0, sizeof(dl.osd_addr)); 205 } 206 up_read(&osdc->map_sem); 207 208 /* send result back to user */ 209 if (copy_to_user(arg, &dl, sizeof(dl))) 210 return -EFAULT; 211 212 return 0; 213 } 214 215 static long ceph_ioctl_lazyio(struct file *file) 216 { 217 struct ceph_file_info *fi = file->private_data; 218 struct inode *inode = file->f_dentry->d_inode; 219 struct ceph_inode_info *ci = ceph_inode(inode); 220 221 if ((fi->fmode & CEPH_FILE_MODE_LAZY) == 0) { 222 spin_lock(&inode->i_lock); 223 ci->i_nr_by_mode[fi->fmode]--; 224 fi->fmode |= CEPH_FILE_MODE_LAZY; 225 ci->i_nr_by_mode[fi->fmode]++; 226 spin_unlock(&inode->i_lock); 227 dout("ioctl_layzio: file %p marked lazy\n", file); 228 229 ceph_check_caps(ci, 0, NULL); 230 } else { 231 dout("ioctl_layzio: file %p already lazy\n", file); 232 } 233 return 0; 234 } 235 236 static long ceph_ioctl_syncio(struct file *file) 237 { 238 struct ceph_file_info *fi = file->private_data; 239 240 fi->flags |= CEPH_F_SYNC; 241 return 0; 242 } 243 244 long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 245 { 246 dout("ioctl file %p cmd %u arg %lu\n", file, cmd, arg); 247 switch (cmd) { 248 case CEPH_IOC_GET_LAYOUT: 249 return ceph_ioctl_get_layout(file, (void __user *)arg); 250 251 case CEPH_IOC_SET_LAYOUT: 252 return ceph_ioctl_set_layout(file, (void __user *)arg); 253 254 case CEPH_IOC_SET_LAYOUT_POLICY: 255 return ceph_ioctl_set_layout_policy(file, (void __user *)arg); 256 257 case CEPH_IOC_GET_DATALOC: 258 return ceph_ioctl_get_dataloc(file, (void __user *)arg); 259 260 case CEPH_IOC_LAZYIO: 261 return ceph_ioctl_lazyio(file); 262 263 case CEPH_IOC_SYNCIO: 264 return ceph_ioctl_syncio(file); 265 } 266 267 return -ENOTTY; 268 } 269