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