lustre/llite/dir.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * Copyright (C) 1992, 1993, 1994, 1995
   5  * Remy Card (card@masi.ibp.fr)
   6  * Laboratoire MASI - Institut Blaise Pascal
   7  * Universite Pierre et Marie Curie (Paris VI)
   8  *
   9  *  from
  10  *
  11  *  linux/fs/minix/dir.c
  12  *  linux/fs/ext2/dir.c
  13  *
  14  *  Copyright (C) 1991, 1992  Linus Torvalds
  15  *
  16  *  ext2 directory handling functions
  17  *
  18  *  Big-endian to little-endian byte-swapping/bitmaps by
  19  *        David S. Miller (davem@caip.rutgers.edu), 1995
  20  *
  21  *  All code that works with directory layout had been switched to pagecache
  22  *  and moved here. AV
  23  *
  24  *  Adapted for Lustre Light
  25  *  Copyright (C) 2002-2003, Cluster File Systems, Inc.
  26  *
  27  */
  28
  29 #include <linux/fs.h>
  30 #include <linux/ext2_fs.h>
  31 #include <linux/pagemap.h>
  32 #include <linux/mm.h>
  33 #include <linux/version.h>
  34 #include <linux/smp_lock.h>
  35 #include <asm/uaccess.h>
  36 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
  37 # include <linux/locks.h>   // for wait_on_buffer
  38 #else
  39 # include <linux/buffer_head.h>   // for wait_on_buffer
  40 #endif
  41
  42 #define DEBUG_SUBSYSTEM S_LLITE
  43
  44 #include <obd_support.h>
  45 #include <obd_class.h>
  46 #include <lustre_lib.h>
  47 #include <lustre/lustre_idl.h>
  48 #include <lustre_lite.h>
  49 #include <lustre_dlm.h>
  50 #include "llite_internal.h"
  51
  52 #define PageChecked(page)        test_bit(PG_checked, &(page)->flags)
  53 #define SetPageChecked(page)     set_bit(PG_checked, &(page)->flags)
  54
  55 /* returns the page unlocked, but with a reference */
  56 static int ll_dir_readpage(struct file *file, struct page *page)
  57 {
  58         struct inode *inode = page->mapping->host;
  59         struct ptlrpc_request *request;
  60         struct mdt_body *body;
  61         __u64 offset;
  62         int rc = 0;
  63         ENTRY;
  64
  65         offset = (__u64)page->index << PAGE_SHIFT;
  66         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) off "LPU64"\n",
  67                inode->i_ino, inode->i_generation, inode, offset);
  68
  69         rc = md_readpage(ll_i2sbi(inode)->ll_md_exp, ll_inode2fid(inode),
  70                          offset, page, &request);
  71         if (!rc) {
  72                 body = lustre_msg_buf(request->rq_repmsg, 0, sizeof (*body));
  73                 LASSERT (body != NULL);         /* checked by md_readpage() */
  74                 LASSERT_REPSWABBED (request, 0); /* swabbed by md_readpage() */
  75
  76                 if (body->valid & OBD_MD_FLSIZE)
  77                         inode->i_size = body->size;
  78                 SetPageUptodate(page);
  79         }
  80         ptlrpc_req_finished(request);
  81
  82         unlock_page(page);
  83         EXIT;
  84         return rc;
  85 }
  86
  87 struct address_space_operations ll_dir_aops = {
  88         .readpage  = ll_dir_readpage,
  89 };
  90
  91 static inline unsigned long dir_pages(struct inode *inode)
  92 {
  93         return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT;
  94 }
  95
  96 static inline unsigned ll_chunk_size(struct inode *inode)
  97 {
  98         return inode->i_sb->s_blocksize;
  99 }
 100
 101 static void ll_check_page(struct inode *dir, struct page *page)
 102 {
 103         /* XXX: check page format later */
 104         SetPageChecked(page);
 105 }
 106
 107 static inline void ll_put_page(struct page *page)
 108 {
 109         kunmap(page);
 110         page_cache_release(page);
 111 }
 112
 113 static struct page *ll_get_dir_page(struct inode *dir, unsigned long n)
 114 {
 115         ldlm_policy_data_t policy = {.l_inodebits = {MDS_INODELOCK_UPDATE} };
 116         struct address_space *mapping = dir->i_mapping;
 117         struct lustre_handle lockh;
 118         struct page *page;
 119         int rc;
 120
 121         rc = md_lock_match(ll_i2sbi(dir)->ll_md_exp, LDLM_FL_BLOCK_GRANTED,
 122                            ll_inode2fid(dir), LDLM_IBITS, &policy, LCK_CR, &lockh);
 123         if (!rc) {
 124                 struct lookup_intent it = { .it_op = IT_READDIR };
 125                 struct md_op_data op_data = { { 0 } };
 126                 struct ptlrpc_request *request;
 127
 128                 ll_prepare_md_op_data(&op_data, dir, NULL, NULL, 0, 0);
 129
 130                 rc = md_enqueue(ll_i2sbi(dir)->ll_md_exp, LDLM_IBITS, &it,
 131                                 LCK_CR, &op_data, &lockh, NULL, 0,
 132                                 ldlm_completion_ast, ll_md_blocking_ast, dir,
 133                                 0);
 134
 135                 request = (struct ptlrpc_request *)it.d.lustre.it_data;
 136                 if (request)
 137                         ptlrpc_req_finished(request);
 138                 if (rc < 0) {
 139                         CERROR("lock enqueue: rc: %d\n", rc);
 140                         return ERR_PTR(rc);
 141                 }
 142         }
 143         ldlm_lock_dump_handle(D_OTHER, &lockh);
 144
 145         page = read_cache_page(mapping, n,
 146                                (filler_t*)mapping->a_ops->readpage, NULL);
 147         if (IS_ERR(page))
 148                 GOTO(out_unlock, page);
 149
 150         wait_on_page(page);
 151         (void)kmap(page);
 152         if (!PageUptodate(page))
 153                 goto fail;
 154         if (!PageChecked(page))
 155                 ll_check_page(dir, page);
 156         if (PageError(page))
 157                 goto fail;
 158
 159 out_unlock:
 160         ldlm_lock_decref(&lockh, LCK_CR);
 161         return page;
 162
 163 fail:
 164         ll_put_page(page);
 165         page = ERR_PTR(-EIO);
 166         goto out_unlock;
 167 }
 168
 169 static inline struct lu_dir_entry *ll_next_entry(struct lu_dir_entry *p)
 170 {
 171         return (struct lu_dir_entry *)((char *)p + le16_to_cpu(p->de_rec_len));
 172 }
 173
 174 int ll_readdir(struct file *filp, void *dirent, filldir_t filldir)
 175 {
 176         struct inode *inode = filp->f_dentry->d_inode;
 177         loff_t pos = filp->f_pos;
 178         unsigned offset = pos & ~PAGE_CACHE_MASK;
 179         unsigned long n = pos >> PAGE_CACHE_SHIFT;
 180         unsigned long npages = dir_pages(inode);
 181         int rc = 0;
 182         ENTRY;
 183
 184         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) pos %llu/%llu\n",
 185                inode->i_ino, inode->i_generation, inode, pos, inode->i_size);
 186
 187         if (pos > inode->i_size - LU_DIR_REC_LEN(1))
 188                 RETURN(0);
 189
 190         for ( ; n < npages; n++, offset = 0) {
 191                 char *kaddr, *limit;
 192                 struct lu_dir_entry *de;
 193                 struct page *page;
 194
 195                 CDEBUG(D_VFSTRACE,"read %lu of dir %lu/%u page %lu/%lu size %llu\n",
 196                        PAGE_CACHE_SIZE, inode->i_ino, inode->i_generation,
 197                        n, npages, inode->i_size);
 198                 page = ll_get_dir_page(inode, n);
 199
 200                 /* size might have been updated by md_readpage */
 201                 npages = dir_pages(inode);
 202
 203                 if (IS_ERR(page)) {
 204                         rc = PTR_ERR(page);
 205                         CERROR("error reading dir %lu/%u page %lu: rc %d\n",
 206                                inode->i_ino, inode->i_generation, n, rc);
 207                         continue;
 208                 }
 209
 210                 kaddr = page_address(page);
 211
 212                 de = (struct lu_dir_entry *)(kaddr + offset);
 213                 limit = kaddr + PAGE_CACHE_SIZE - LU_DIR_REC_LEN(1);
 214                 for ( ;(char*)de <= limit; de = ll_next_entry(de)) {
 215                         if (fid_oid(&de->de_fid) && fid_seq(&de->de_fid)) {
 216                                 struct ll_sb_info *sbi = ll_i2sbi(inode);
 217                                 int over;
 218
 219                                 rc = 0; /* no error if we return something */
 220
 221                                 offset = (char *)de - kaddr;
 222                                 fid_le_to_cpu(&de->de_fid);
 223                                 over = filldir(dirent, de->de_name, de->de_name_len,
 224                                                (n << PAGE_CACHE_SHIFT) | offset,
 225                                                ll_fid_build_ino(sbi, &de->de_fid),
 226                                                0);
 227                                 if (over) {
 228                                         ll_put_page(page);
 229                                         GOTO(done, rc);
 230                                 }
 231                         }
 232                 }
 233                 ll_put_page(page);
 234         }
 235
 236 done:
 237         filp->f_pos = (n << PAGE_CACHE_SHIFT) | offset;
 238         filp->f_version = inode->i_version;
 239         touch_atime(filp->f_vfsmnt, filp->f_dentry);
 240
 241         RETURN(rc);
 242 }
 243
 244 #define QCTL_COPY(out, in)              \
 245 do {                                    \
 246         Q_COPY(out, in, qc_cmd);        \
 247         Q_COPY(out, in, qc_type);       \
 248         Q_COPY(out, in, qc_id);         \
 249         Q_COPY(out, in, qc_stat);       \
 250         Q_COPY(out, in, qc_dqinfo);     \
 251         Q_COPY(out, in, qc_dqblk);      \
 252 } while (0)
 253
 254 static int ll_dir_ioctl(struct inode *inode, struct file *file,
 255                         unsigned int cmd, unsigned long arg)
 256 {
 257         struct ll_sb_info *sbi = ll_i2sbi(inode);
 258         struct obd_ioctl_data *data;
 259         ENTRY;
 260
 261         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), cmd=%#x\n",
 262                inode->i_ino, inode->i_generation, inode, cmd);
 263
 264         /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
 265         if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
 266                 return -ENOTTY;
 267
 268         lprocfs_counter_incr(ll_i2sbi(inode)->ll_stats, LPROC_LL_IOCTL);
 269         switch(cmd) {
 270         case EXT3_IOC_GETFLAGS:
 271         case EXT3_IOC_SETFLAGS:
 272                 RETURN(ll_iocontrol(inode, file, cmd, arg));
 273         case EXT3_IOC_GETVERSION_OLD:
 274         case EXT3_IOC_GETVERSION:
 275                 RETURN(put_user(inode->i_generation, (int *)arg));
 276         /* We need to special case any other ioctls we want to handle,
 277          * to send them to the MDS/OST as appropriate and to properly
 278          * network encode the arg field.
 279         case EXT3_IOC_SETVERSION_OLD:
 280         case EXT3_IOC_SETVERSION:
 281         */
 282         case IOC_MDC_LOOKUP: {
 283                 struct ptlrpc_request *request = NULL;
 284                 int namelen, rc, len = 0;
 285                 char *buf = NULL;
 286                 char *filename;
 287
 288                 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
 289                 if (rc)
 290                         RETURN(rc);
 291                 data = (void *)buf;
 292
 293                 filename = data->ioc_inlbuf1;
 294                 namelen = data->ioc_inllen1;
 295
 296                 if (namelen < 1) {
 297                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
 298                         GOTO(out, rc = -EINVAL);
 299                 }
 300
 301                 rc = md_getattr_name(sbi->ll_md_exp, ll_inode2fid(inode),
 302                                      filename, namelen, OBD_MD_FLID, 0,
 303                                      &request);
 304                 if (rc < 0) {
 305                         CDEBUG(D_INFO, "md_getattr_name: %d\n", rc);
 306                         GOTO(out, rc);
 307                 }
 308
 309                 ptlrpc_req_finished(request);
 310
 311                 EXIT;
 312         out:
 313                 obd_ioctl_freedata(buf, len);
 314                 return rc;
 315         }
 316         case LL_IOC_LOV_SETSTRIPE: {
 317                 struct ptlrpc_request *request = NULL;
 318                 struct md_op_data op_data = { { 0 } };
 319                 struct iattr attr = { 0 };
 320                 struct lov_user_md lum, *lump = (struct lov_user_md *)arg;
 321                 int rc = 0;
 322
 323                 ll_prepare_md_op_data(&op_data, inode,
 324                                       NULL, NULL, 0, 0);
 325
 326                 LASSERT(sizeof(lum) == sizeof(*lump));
 327                 LASSERT(sizeof(lum.lmm_objects[0]) ==
 328                         sizeof(lump->lmm_objects[0]));
 329                 rc = copy_from_user(&lum, lump, sizeof(lum));
 330                 if (rc)
 331                         return(-EFAULT);
 332
 333                 /*
 334                  * This is coming from userspace, so should be in
 335                  * local endian.  But the MDS would like it in little
 336                  * endian, so we swab it before we send it.
 337                  */
 338                 if (lum.lmm_magic != LOV_USER_MAGIC)
 339                         RETURN(-EINVAL);
 340
 341                 if (lum.lmm_magic != cpu_to_le32(LOV_USER_MAGIC))
 342                         lustre_swab_lov_user_md(&lum);
 343
 344                 /* swabbing is done in lov_setstripe() on server side */
 345                 rc = md_setattr(sbi->ll_md_exp, &op_data,
 346                                 &attr, &lum, sizeof(lum), NULL, 0, &request);
 347                 if (rc) {
 348                         ptlrpc_req_finished(request);
 349                         if (rc != -EPERM && rc != -EACCES)
 350                                 CERROR("md_setattr fails: rc = %d\n", rc);
 351                         return rc;
 352                 }
 353                 ptlrpc_req_finished(request);
 354
 355                 return rc;
 356         }
 357         case LL_IOC_LOV_GETSTRIPE: {
 358                 struct ptlrpc_request *request = NULL;
 359                 struct lov_user_md *lump = (struct lov_user_md *)arg;
 360                 struct lov_mds_md *lmm;
 361                 struct mdt_body *body;
 362                 int rc, lmmsize;
 363
 364                 rc = ll_get_max_mdsize(sbi, &lmmsize);
 365                 if (rc)
 366                         RETURN(rc);
 367
 368                 rc = md_getattr(sbi->ll_md_exp, ll_inode2fid(inode),
 369                                 OBD_MD_FLDIREA, lmmsize, &request);
 370                 if (rc < 0) {
 371                         CDEBUG(D_INFO, "md_getattr failed: rc = %d\n", rc);
 372                         RETURN(rc);
 373                 }
 374
 375                 body = lustre_msg_buf(request->rq_repmsg, 0, sizeof(*body));
 376                 LASSERT(body != NULL);         /* checked by md_getattr_name */
 377                 LASSERT_REPSWABBED(request, 0);/* swabbed by md_getattr_name */
 378
 379                 lmmsize = body->eadatasize;
 380                 if (lmmsize == 0)
 381                         GOTO(out_get, rc = -ENODATA);
 382
 383                 lmm = lustre_msg_buf(request->rq_repmsg, 1, lmmsize);
 384                 LASSERT(lmm != NULL);
 385                 LASSERT_REPSWABBED(request, 1);
 386
 387                 /*
 388                  * This is coming from the MDS, so is probably in
 389                  * little endian.  We convert it to host endian before
 390                  * passing it to userspace.
 391                  */
 392                 if (lmm->lmm_magic == __swab32(LOV_MAGIC)) {
 393                         lustre_swab_lov_user_md((struct lov_user_md *)lmm);
 394                         lustre_swab_lov_user_md_objects((struct lov_user_md *)lmm);
 395                 }
 396
 397                 rc = copy_to_user(lump, lmm, lmmsize);
 398                 if (rc)
 399                         GOTO(out_get, rc = -EFAULT);
 400
 401                 EXIT;
 402         out_get:
 403                 ptlrpc_req_finished(request);
 404                 return rc;
 405         }
 406         case LL_IOC_OBD_STATFS:
 407                 RETURN(ll_obd_statfs(inode, (void *)arg));
 408         case IOC_MDC_GETFILEINFO:
 409         case IOC_MDC_GETSTRIPE: {
 410                 struct ptlrpc_request *request = NULL;
 411                 struct lov_user_md *lump;
 412                 struct lov_mds_md *lmm;
 413                 struct mdt_body *body;
 414                 char *filename;
 415                 int rc, lmmsize;
 416
 417                 filename = getname((const char *)arg);
 418                 if (IS_ERR(filename))
 419                         RETURN(PTR_ERR(filename));
 420
 421                 rc = ll_get_max_mdsize(sbi, &lmmsize);
 422                 if (rc)
 423                         RETURN(rc);
 424
 425                 rc = md_getattr_name(sbi->ll_md_exp, ll_inode2fid(inode),
 426                                      filename, strlen(filename) + 1,
 427                                      OBD_MD_FLEASIZE, lmmsize, &request);
 428                 if (rc < 0) {
 429                         CDEBUG(D_INFO, "md_getattr_name failed on %s: rc %d\n",
 430                                filename, rc);
 431                         GOTO(out_name, rc);
 432                 }
 433
 434                 body = lustre_msg_buf(request->rq_repmsg, 0, sizeof (*body));
 435                 LASSERT(body != NULL);         /* checked by md_getattr_name */
 436                 LASSERT_REPSWABBED(request, 0);/* swabbed by md_getattr_name */
 437
 438                 lmmsize = body->eadatasize;
 439
 440                 if (!(body->valid & OBD_MD_FLEASIZE) || lmmsize == 0)
 441                         GOTO(out_req, rc = -ENODATA);
 442
 443                 if (lmmsize > 4096)
 444                         GOTO(out_req, rc = -EFBIG);
 445
 446                 lmm = lustre_msg_buf(request->rq_repmsg, 1, lmmsize);
 447                 LASSERT(lmm != NULL);
 448                 LASSERT_REPSWABBED(request, 1);
 449
 450                 /*
 451                  * This is coming from the MDS, so is probably in
 452                  * little endian.  We convert it to host endian before
 453                  * passing it to userspace.
 454                  */
 455                 if (lmm->lmm_magic == __swab32(LOV_MAGIC)) {
 456                         lustre_swab_lov_user_md((struct lov_user_md *)lmm);
 457                         lustre_swab_lov_user_md_objects((struct lov_user_md *)lmm);
 458                 } else if (lmm->lmm_magic == __swab32(LOV_MAGIC_JOIN)) {
 459                         lustre_swab_lov_user_md_join((struct lov_user_md_join *)lmm);
 460                 }
 461                 if (lmm->lmm_magic == LOV_MAGIC_JOIN) {
 462                         struct lov_stripe_md *lsm;
 463                         struct lov_user_md_join *lmj;
 464                         int lmj_size, i, aindex = 0, rc;
 465
 466                         rc = obd_unpackmd(sbi->ll_dt_exp, &lsm, lmm, lmmsize);
 467                         if (rc < 0)
 468                                 GOTO(out_req, rc = -ENOMEM);
 469                         rc = obd_checkmd(sbi->ll_dt_exp, sbi->ll_md_exp, lsm);
 470                         if (rc)
 471                                 GOTO(out_free_memmd, rc);
 472
 473                         lmj_size = sizeof(struct lov_user_md_join) +
 474                                    lsm->lsm_stripe_count *
 475                                    sizeof(struct lov_user_ost_data_join);
 476                         OBD_ALLOC(lmj, lmj_size);
 477                         if (!lmj)
 478                                 GOTO(out_free_memmd, rc = -ENOMEM);
 479
 480                         memcpy(lmj, lmm, sizeof(struct lov_user_md_join));
 481                         for (i = 0; i < lsm->lsm_stripe_count; i++) {
 482                                 struct lov_array_info *lai = lsm->lsm_array;
 483                                 if ((lai->lai_ext_array[aindex].le_loi_idx +
 484                                      lai->lai_ext_array[aindex].le_stripe_count)<=i){
 485                                         aindex ++;
 486                                 }
 487                                 CDEBUG(D_INFO, "aindex %d i %d l_extent_start"
 488                                        LPU64"len %d \n", aindex, i,
 489                                        lai->lai_ext_array[aindex].le_start,
 490                                        (int)lai->lai_ext_array[aindex].le_len);
 491                                 lmj->lmm_objects[i].l_extent_start =
 492                                         lai->lai_ext_array[aindex].le_start;
 493
 494                                 if ((int)lai->lai_ext_array[aindex].le_len == -1) {
 495                                         lmj->lmm_objects[i].l_extent_end = -1;
 496                                 } else {
 497                                         lmj->lmm_objects[i].l_extent_end =
 498                                           lai->lai_ext_array[aindex].le_start +
 499                                           lai->lai_ext_array[aindex].le_len;
 500                                 }
 501                                 lmj->lmm_objects[i].l_object_id =
 502                                         lsm->lsm_oinfo[i].loi_id;
 503                                 lmj->lmm_objects[i].l_object_gr =
 504                                         lsm->lsm_oinfo[i].loi_gr;
 505                                 lmj->lmm_objects[i].l_ost_gen =
 506                                         lsm->lsm_oinfo[i].loi_ost_gen;
 507                                 lmj->lmm_objects[i].l_ost_idx =
 508                                         lsm->lsm_oinfo[i].loi_ost_idx;
 509                         }
 510                         lmm = (struct lov_mds_md *)lmj;
 511                         lmmsize = lmj_size;
 512 out_free_memmd:
 513                         obd_free_memmd(sbi->ll_dt_exp, &lsm);
 514                         if (rc)
 515                                 GOTO(out_req, rc);
 516                 }
 517                 if (cmd == IOC_MDC_GETFILEINFO) {
 518                         struct lov_user_mds_data *lmdp;
 519                         lstat_t st = { 0 };
 520
 521                         st.st_dev     = 0;
 522                         st.st_mode    = body->mode;
 523                         st.st_nlink   = body->nlink;
 524                         st.st_uid     = body->uid;
 525                         st.st_gid     = body->gid;
 526                         st.st_rdev    = body->rdev;
 527                         st.st_size    = body->size;
 528                         st.st_blksize = PAGE_SIZE;
 529                         st.st_blocks  = body->blocks;
 530                         st.st_atime   = body->atime;
 531                         st.st_mtime   = body->mtime;
 532                         st.st_ctime   = body->ctime;
 533                         st.st_ino     = inode->i_ino;
 534
 535                         lmdp = (struct lov_user_mds_data *)arg;
 536                         rc = copy_to_user(&lmdp->lmd_st, &st, sizeof(st));
 537                         if (rc)
 538                                 GOTO(out_req, rc = -EFAULT);
 539                         lump = &lmdp->lmd_lmm;
 540                 } else {
 541                         lump = (struct lov_user_md *)arg;
 542                 }
 543
 544                 rc = copy_to_user(lump, lmm, lmmsize);
 545                 if (lmm->lmm_magic == LOV_MAGIC_JOIN)
 546                         OBD_FREE(lmm, lmmsize);
 547                 if (rc)
 548                         GOTO(out_req, rc = -EFAULT);
 549
 550                 EXIT;
 551         out_req:
 552                 ptlrpc_req_finished(request);
 553         out_name:
 554                 putname(filename);
 555                 return rc;
 556         }
 557         case OBD_IOC_LLOG_CATINFO: {
 558                 struct ptlrpc_request *req = NULL;
 559                 char *buf = NULL;
 560                 int rc, len = 0;
 561                 char *bufs[2], *str;
 562                 int lens[2], size;
 563
 564                 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
 565                 if (rc)
 566                         RETURN(rc);
 567                 data = (void *)buf;
 568
 569                 if (!data->ioc_inlbuf1) {
 570                         obd_ioctl_freedata(buf, len);
 571                         RETURN(-EINVAL);
 572                 }
 573
 574                 lens[0] = data->ioc_inllen1;
 575                 bufs[0] = data->ioc_inlbuf1;
 576                 if (data->ioc_inllen2) {
 577                         lens[1] = data->ioc_inllen2;
 578                         bufs[1] = data->ioc_inlbuf2;
 579                 } else {
 580                         lens[1] = 0;
 581                         bufs[1] = NULL;
 582                 }
 583                 size = data->ioc_plen1;
 584                 req = ptlrpc_prep_req(sbi2mdc(sbi)->cl_import,
 585                                       LUSTRE_LOG_VERSION, LLOG_CATINFO,
 586                                       2, lens, bufs);
 587                 if (!req)
 588                         GOTO(out_catinfo, rc = -ENOMEM);
 589                 req->rq_replen = lustre_msg_size(1, &size);
 590
 591                 rc = ptlrpc_queue_wait(req);
 592                 str = lustre_msg_string(req->rq_repmsg, 0, data->ioc_plen1);
 593                 if (!rc)
 594                         rc = copy_to_user(data->ioc_pbuf1, str,
 595                                           data->ioc_plen1);
 596                 ptlrpc_req_finished(req);
 597         out_catinfo:
 598                 obd_ioctl_freedata(buf, len);
 599                 RETURN(rc);
 600         }
 601         case OBD_IOC_QUOTACHECK: {
 602                 struct obd_quotactl *oqctl;
 603                 int rc, error = 0;
 604
 605                 if (!capable(CAP_SYS_ADMIN))
 606                         RETURN(-EPERM);
 607
 608                 OBD_ALLOC_PTR(oqctl);
 609                 if (!oqctl)
 610                         RETURN(-ENOMEM);
 611                 oqctl->qc_type = arg;
 612                 rc = obd_quotacheck(sbi->ll_md_exp, oqctl);
 613                 if (rc < 0) {
 614                         CDEBUG(D_INFO, "md_quotacheck failed: rc %d\n", rc);
 615                         error = rc;
 616                 }
 617
 618                 rc = obd_quotacheck(sbi->ll_dt_exp, oqctl);
 619                 if (rc < 0)
 620                         CDEBUG(D_INFO, "obd_quotacheck failed: rc %d\n", rc);
 621
 622                 OBD_FREE_PTR(oqctl);
 623                 return error ?: rc;
 624         }
 625         case OBD_IOC_POLL_QUOTACHECK: {
 626                 struct if_quotacheck *check;
 627                 int rc;
 628
 629                 if (!capable(CAP_SYS_ADMIN))
 630                         RETURN(-EPERM);
 631
 632                 OBD_ALLOC_PTR(check);
 633                 if (!check)
 634                         RETURN(-ENOMEM);
 635
 636                 rc = obd_iocontrol(cmd, sbi->ll_md_exp, 0, (void *)check,
 637                                    NULL);
 638                 if (rc) {
 639                         CDEBUG(D_QUOTA, "mdc ioctl %d failed: %d\n", cmd, rc);
 640                         if (copy_to_user((void *)arg, check, sizeof(*check)))
 641                                 rc = -EFAULT;
 642                         GOTO(out_poll, rc);
 643                 }
 644
 645                 rc = obd_iocontrol(cmd, sbi->ll_dt_exp, 0, (void *)check,
 646                                    NULL);
 647                 if (rc) {
 648                         CDEBUG(D_QUOTA, "osc ioctl %d failed: %d\n", cmd, rc);
 649                         if (copy_to_user((void *)arg, check, sizeof(*check)))
 650                                 rc = -EFAULT;
 651                         GOTO(out_poll, rc);
 652                 }
 653         out_poll:
 654                 OBD_FREE_PTR(check);
 655                 RETURN(rc);
 656         }
 657 #if HAVE_QUOTA_SUPPORT
 658         case OBD_IOC_QUOTACTL: {
 659                 struct if_quotactl *qctl;
 660                 struct obd_quotactl *oqctl;
 661
 662                 int cmd, type, id, rc = 0;
 663
 664                 OBD_ALLOC_PTR(qctl);
 665                 if (!qctl)
 666                         RETURN(-ENOMEM);
 667
 668                 OBD_ALLOC_PTR(oqctl);
 669                 if (!oqctl) {
 670                         OBD_FREE_PTR(qctl);
 671                         RETURN(-ENOMEM);
 672                 }
 673                 if (copy_from_user(qctl, (void *)arg, sizeof(*qctl)))
 674                         GOTO(out_quotactl, rc = -EFAULT);
 675
 676                 cmd = qctl->qc_cmd;
 677                 type = qctl->qc_type;
 678                 id = qctl->qc_id;
 679                 switch (cmd) {
 680                 case Q_QUOTAON:
 681                 case Q_QUOTAOFF:
 682                 case Q_SETQUOTA:
 683                 case Q_SETINFO:
 684                         if (!capable(CAP_SYS_ADMIN))
 685                                 GOTO(out_quotactl, rc = -EPERM);
 686                         break;
 687                 case Q_GETQUOTA:
 688                         if (((type == USRQUOTA && current->euid != id) ||
 689                              (type == GRPQUOTA && !in_egroup_p(id))) &&
 690                             !capable(CAP_SYS_ADMIN))
 691                                 GOTO(out_quotactl, rc = -EPERM);
 692
 693                         /* XXX: dqb_valid is borrowed as a flag to mark that
 694                          *      only mds quota is wanted */
 695                         if (qctl->qc_dqblk.dqb_valid)
 696                                 qctl->obd_uuid = sbi->ll_md_exp->exp_obd->
 697                                                         u.cli.cl_target_uuid;
 698                         break;
 699                 case Q_GETINFO:
 700                         break;
 701                 default:
 702                         CERROR("unsupported quotactl op: %#x\n", cmd);
 703                         GOTO(out_quotactl, -ENOTTY);
 704                 }
 705
 706                 QCTL_COPY(oqctl, qctl);
 707
 708                 if (qctl->obd_uuid.uuid[0]) {
 709                         struct obd_device *obd;
 710                         struct obd_uuid *uuid = &qctl->obd_uuid;
 711
 712                         obd = class_find_client_notype(uuid,
 713                                          &sbi->ll_dt_exp->exp_obd->obd_uuid);
 714                         if (!obd)
 715                                 GOTO(out_quotactl, rc = -ENOENT);
 716
 717                         if (cmd == Q_GETINFO)
 718                                 oqctl->qc_cmd = Q_GETOINFO;
 719                         else if (cmd == Q_GETQUOTA)
 720                                 oqctl->qc_cmd = Q_GETOQUOTA;
 721                         else
 722                                 GOTO(out_quotactl, rc = -EINVAL);
 723
 724                         if (sbi->ll_md_exp->exp_obd == obd) {
 725                                 rc = obd_quotactl(sbi->ll_md_exp, oqctl);
 726                         } else {
 727                                 int i;
 728                                 struct obd_export *exp;
 729                                 struct lov_obd *lov = &sbi->ll_dt_exp->
 730                                                             exp_obd->u.lov;
 731
 732                                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 733                                         exp = lov->tgts[i].ltd_exp;
 734
 735                                         if (!lov->tgts[i].active)
 736                                                 continue;
 737
 738                                         if (exp->exp_obd == obd) {
 739                                                 rc = obd_quotactl(exp, oqctl);
 740                                                 break;
 741                                         }
 742                                 }
 743                         }
 744
 745                         oqctl->qc_cmd = cmd;
 746                         QCTL_COPY(qctl, oqctl);
 747
 748                         if (copy_to_user((void *)arg, qctl, sizeof(*qctl)))
 749                                 rc = -EFAULT;
 750
 751                         GOTO(out_quotactl, rc);
 752                 }
 753
 754                 rc = obd_quotactl(sbi->ll_md_exp, oqctl);
 755                 if (rc && rc != -EBUSY && cmd == Q_QUOTAON) {
 756                         oqctl->qc_cmd = Q_QUOTAOFF;
 757                         obd_quotactl(sbi->ll_md_exp, oqctl);
 758                 }
 759
 760                 QCTL_COPY(qctl, oqctl);
 761
 762                 if (copy_to_user((void *)arg, qctl, sizeof(*qctl)))
 763                         rc = -EFAULT;
 764         out_quotactl:
 765                 OBD_FREE_PTR(qctl);
 766                 OBD_FREE_PTR(oqctl);
 767                 RETURN(rc);
 768         }
 769 #endif /* HAVE_QUOTA_SUPPORT */
 770         case OBD_IOC_GETNAME: {
 771                 struct obd_device *obd = class_exp2obd(sbi->ll_dt_exp);
 772                 if (!obd)
 773                         RETURN(-EFAULT);
 774                 if (copy_to_user((void *)arg, obd->obd_name,
 775                                 strlen(obd->obd_name) + 1))
 776                         RETURN (-EFAULT);
 777                 RETURN(0);
 778         }
 779         default:
 780                 RETURN(obd_iocontrol(cmd, sbi->ll_dt_exp,0,NULL,(void *)arg));
 781         }
 782 }
 783
 784 int ll_dir_open(struct inode *inode, struct file *file)
 785 {
 786         ENTRY;
 787         RETURN(ll_file_open(inode, file));
 788 }
 789
 790 int ll_dir_release(struct inode *inode, struct file *file)
 791 {
 792         ENTRY;
 793         RETURN(ll_file_release(inode, file));
 794 }
 795
 796 struct file_operations ll_dir_operations = {
 797         .open     = ll_dir_open,
 798         .release  = ll_dir_release,
 799         .read     = generic_read_dir,
 800         .readdir  = ll_readdir,
 801         .ioctl    = ll_dir_ioctl
 802 };
 803