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 = file->f_dentry->d_parent->d_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 err = ceph_mdsc_do_request(mdsc, parent_inode, req); 91 ceph_mdsc_put_request(req); 92 return err; 93 } 94 95 /* 96 * Set a layout policy on a directory inode. All items in the tree 97 * rooted at this inode will inherit this layout on creation, 98 * (It doesn't apply retroactively ) 99 * unless a subdirectory has its own layout policy. 100 */ 101 static long ceph_ioctl_set_layout_policy (struct file *file, void __user *arg) 102 { 103 struct inode *inode = file->f_dentry->d_inode; 104 struct ceph_mds_request *req; 105 struct ceph_ioctl_layout l; 106 int err, i; 107 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; 108 109 /* copy and validate */ 110 if (copy_from_user(&l, arg, sizeof(l))) 111 return -EFAULT; 112 113 if ((l.object_size & ~PAGE_MASK) || 114 (l.stripe_unit & ~PAGE_MASK) || 115 !l.stripe_unit || 116 (l.object_size && 117 (unsigned)l.object_size % (unsigned)l.stripe_unit)) 118 return -EINVAL; 119 120 /* make sure it's a valid data pool */ 121 if (l.data_pool > 0) { 122 mutex_lock(&mdsc->mutex); 123 err = -EINVAL; 124 for (i = 0; i < mdsc->mdsmap->m_num_data_pg_pools; i++) 125 if (mdsc->mdsmap->m_data_pg_pools[i] == l.data_pool) { 126 err = 0; 127 break; 128 } 129 mutex_unlock(&mdsc->mutex); 130 if (err) 131 return err; 132 } 133 134 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETDIRLAYOUT, 135 USE_AUTH_MDS); 136 137 if (IS_ERR(req)) 138 return PTR_ERR(req); 139 req->r_inode = inode; 140 ihold(inode); 141 142 req->r_args.setlayout.layout.fl_stripe_unit = 143 cpu_to_le32(l.stripe_unit); 144 req->r_args.setlayout.layout.fl_stripe_count = 145 cpu_to_le32(l.stripe_count); 146 req->r_args.setlayout.layout.fl_object_size = 147 cpu_to_le32(l.object_size); 148 req->r_args.setlayout.layout.fl_pg_pool = 149 cpu_to_le32(l.data_pool); 150 req->r_args.setlayout.layout.fl_pg_preferred = 151 cpu_to_le32(l.preferred_osd); 152 153 err = ceph_mdsc_do_request(mdsc, inode, req); 154 ceph_mdsc_put_request(req); 155 return err; 156 } 157 158 /* 159 * Return object name, size/offset information, and location (OSD 160 * number, network address) for a given file offset. 161 */ 162 static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg) 163 { 164 struct ceph_ioctl_dataloc dl; 165 struct inode *inode = file->f_dentry->d_inode; 166 struct ceph_inode_info *ci = ceph_inode(inode); 167 struct ceph_osd_client *osdc = 168 &ceph_sb_to_client(inode->i_sb)->client->osdc; 169 u64 len = 1, olen; 170 u64 tmp; 171 struct ceph_object_layout ol; 172 struct ceph_pg pgid; 173 174 /* copy and validate */ 175 if (copy_from_user(&dl, arg, sizeof(dl))) 176 return -EFAULT; 177 178 down_read(&osdc->map_sem); 179 ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, &len, 180 &dl.object_no, &dl.object_offset, &olen); 181 dl.file_offset -= dl.object_offset; 182 dl.object_size = ceph_file_layout_object_size(ci->i_layout); 183 dl.block_size = ceph_file_layout_su(ci->i_layout); 184 185 /* block_offset = object_offset % block_size */ 186 tmp = dl.object_offset; 187 dl.block_offset = do_div(tmp, dl.block_size); 188 189 snprintf(dl.object_name, sizeof(dl.object_name), "%llx.%08llx", 190 ceph_ino(inode), dl.object_no); 191 ceph_calc_object_layout(&ol, dl.object_name, &ci->i_layout, 192 osdc->osdmap); 193 194 pgid = ol.ol_pgid; 195 dl.osd = ceph_calc_pg_primary(osdc->osdmap, pgid); 196 if (dl.osd >= 0) { 197 struct ceph_entity_addr *a = 198 ceph_osd_addr(osdc->osdmap, dl.osd); 199 if (a) 200 memcpy(&dl.osd_addr, &a->in_addr, sizeof(dl.osd_addr)); 201 } else { 202 memset(&dl.osd_addr, 0, sizeof(dl.osd_addr)); 203 } 204 up_read(&osdc->map_sem); 205 206 /* send result back to user */ 207 if (copy_to_user(arg, &dl, sizeof(dl))) 208 return -EFAULT; 209 210 return 0; 211 } 212 213 static long ceph_ioctl_lazyio(struct file *file) 214 { 215 struct ceph_file_info *fi = file->private_data; 216 struct inode *inode = file->f_dentry->d_inode; 217 struct ceph_inode_info *ci = ceph_inode(inode); 218 219 if ((fi->fmode & CEPH_FILE_MODE_LAZY) == 0) { 220 spin_lock(&inode->i_lock); 221 ci->i_nr_by_mode[fi->fmode]--; 222 fi->fmode |= CEPH_FILE_MODE_LAZY; 223 ci->i_nr_by_mode[fi->fmode]++; 224 spin_unlock(&inode->i_lock); 225 dout("ioctl_layzio: file %p marked lazy\n", file); 226 227 ceph_check_caps(ci, 0, NULL); 228 } else { 229 dout("ioctl_layzio: file %p already lazy\n", file); 230 } 231 return 0; 232 } 233 234 long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 235 { 236 dout("ioctl file %p cmd %u arg %lu\n", file, cmd, arg); 237 switch (cmd) { 238 case CEPH_IOC_GET_LAYOUT: 239 return ceph_ioctl_get_layout(file, (void __user *)arg); 240 241 case CEPH_IOC_SET_LAYOUT: 242 return ceph_ioctl_set_layout(file, (void __user *)arg); 243 244 case CEPH_IOC_SET_LAYOUT_POLICY: 245 return ceph_ioctl_set_layout_policy(file, (void __user *)arg); 246 247 case CEPH_IOC_GET_DATALOC: 248 return ceph_ioctl_get_dataloc(file, (void __user *)arg); 249 250 case CEPH_IOC_LAZYIO: 251 return ceph_ioctl_lazyio(file); 252 } 253 254 return -ENOTTY; 255 } 256