ldiskfs/kernel_patches/patches/rhel7/ext4-projid-xfs-ioctls.patch

   1 diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
   2 index ce3b85f..29db502 100644
   3 --- a/fs/ext4/ext4.h
   4 +++ b/fs/ext4/ext4.h
   5 @@ -395,6 +395,13 @@ struct flex_groups {
   6  #define EXT4_FL_USER_VISIBLE           0x304BDFFF /* User visible flags */
   7  #define EXT4_FL_USER_MODIFIABLE                0x204380FF /* User modifiable flags */
   8
   9 +#define EXT4_FL_XFLAG_VISIBLE          (EXT4_SYNC_FL | \
  10 +                                        EXT4_IMMUTABLE_FL | \
  11 +                                        EXT4_APPEND_FL | \
  12 +                                        EXT4_NODUMP_FL | \
  13 +                                        EXT4_NOATIME_FL | \
  14 +                                        EXT4_PROJINHERIT_FL)
  15 +
  16  /* Flags that should be inherited by new inodes from their parent. */
  17  #define EXT4_FL_INHERITED (EXT4_SECRM_FL | EXT4_UNRM_FL | EXT4_COMPR_FL |\
  18                            EXT4_SYNC_FL | EXT4_NODUMP_FL | EXT4_NOATIME_FL |\
  19 @@ -620,6 +627,44 @@ enum {
  20  #define EXT4_IOC_SWAP_BOOT             _IO('f', 17)
  21  #define EXT4_IOC_PRECACHE_EXTENTS      _IO('f', 18)
  22
  23 +#ifndef FS_IOC_FSGETXATTR
  24 +/* Until the uapi changes get merged for project quota... */
  25 +#define FS_IOC_FSGETXATTR               _IOR('X', 31, struct fsxattr)
  26 +#define FS_IOC_FSSETXATTR               _IOW('X', 32, struct fsxattr)
  27 +/*
  28 + * Structure for FS_IOC_FSGETXATTR and FS_IOC_FSSETXATTR.
  29 + */
  30 +struct fsxattr {
  31 +       __u32           fsx_xflags;     /* xflags field value (get/set) */
  32 +       __u32           fsx_extsize;    /* extsize field value (get/set)*/
  33 +       __u32           fsx_nextents;   /* nextents field value (get)   */
  34 +       __u32           fsx_projid;     /* project identifier (get/set) */
  35 +       unsigned char   fsx_pad[12];
  36 +};
  37 +
  38 +/*
  39 + * Flags for the fsx_xflags field
  40 + */
  41 +#define FS_XFLAG_REALTIME      0x00000001      /* data in realtime volume */
  42 +#define FS_XFLAG_PREALLOC      0x00000002      /* preallocated file extents */
  43 +#define FS_XFLAG_IMMUTABLE     0x00000008      /* file cannot be modified */
  44 +#define FS_XFLAG_APPEND                0x00000010      /* all writes append */
  45 +#define FS_XFLAG_SYNC          0x00000020      /* all writes synchronous */
  46 +#define FS_XFLAG_NOATIME       0x00000040      /* do not update access time */
  47 +#define FS_XFLAG_NODUMP                0x00000080      /* do not include in backups */
  48 +#define FS_XFLAG_RTINHERIT     0x00000100      /* create with rt bit set */
  49 +#define FS_XFLAG_PROJINHERIT   0x00000200      /* create with parents projid */
  50 +#define FS_XFLAG_NOSYMLINKS    0x00000400      /* disallow symlink creation */
  51 +#define FS_XFLAG_EXTSIZE       0x00000800      /* extent size allocator hint */
  52 +#define FS_XFLAG_EXTSZINHERIT  0x00001000      /* inherit inode extent size */
  53 +#define FS_XFLAG_NODEFRAG      0x00002000      /* do not defragment */
  54 +#define FS_XFLAG_FILESTREAM    0x00004000      /* use filestream allocator */
  55 +#define FS_XFLAG_HASATTR       0x80000000      /* no DIFLAG for this */
  56 +#endif /* !defined(FS_IOC_FSGETXATTR) */
  57 +
  58 +#define EXT4_IOC_FSGETXATTR            FS_IOC_FSGETXATTR
  59 +#define EXT4_IOC_FSSETXATTR            FS_IOC_FSSETXATTR
  60 +
  61  #if defined(__KERNEL__) && defined(CONFIG_COMPAT)
  62  /*
  63   * ioctl commands in 32 bit emulation
  64 diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
  65 index 70c66d3..276d33d 100644
  66 --- a/fs/ext4/ioctl.c
  67 +++ b/fs/ext4/ioctl.c
  68 @@ -15,6 +15,7 @@
  69  #include <linux/mount.h>
  70  #include <linux/file.h>
  71  #include <asm/uaccess.h>
  72 +#include <linux/quotaops.h>
  73  #include "ext4_jbd2.h"
  74  #include "ext4.h"
  75
  76 @@ -198,6 +199,242 @@ journal_err_out:
  77         return err;
  78  }
  79
  80 +static int ext4_ioctl_setflags(struct inode *inode,
  81 +                              unsigned int flags)
  82 +{
  83 +       struct ext4_inode_info *ei = EXT4_I(inode);
  84 +       handle_t *handle = NULL;
  85 +       int err = EPERM, migrate = 0;
  86 +       struct ext4_iloc iloc;
  87 +       unsigned int oldflags, mask, i;
  88 +       unsigned int jflag;
  89 +
  90 +       /* Is it quota file? Do not allow user to mess with it */
  91 +       if (IS_NOQUOTA(inode))
  92 +               goto flags_out;
  93 +
  94 +       oldflags = ei->i_flags;
  95 +
  96 +       /* The JOURNAL_DATA flag is modifiable only by root */
  97 +       jflag = flags & EXT4_JOURNAL_DATA_FL;
  98 +
  99 +       /*
 100 +        * The IMMUTABLE and APPEND_ONLY flags can only be changed by
 101 +        * the relevant capability.
 102 +        *
 103 +        * This test looks nicer. Thanks to Pauline Middelink
 104 +        */
 105 +       if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) {
 106 +               if (!capable(CAP_LINUX_IMMUTABLE))
 107 +                       goto flags_out;
 108 +       }
 109 +
 110 +       /*
 111 +        * The JOURNAL_DATA flag can only be changed by
 112 +        * the relevant capability.
 113 +        */
 114 +       if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
 115 +               if (!capable(CAP_SYS_RESOURCE))
 116 +                       goto flags_out;
 117 +       }
 118 +       if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
 119 +               migrate = 1;
 120 +
 121 +       if (flags & EXT4_EOFBLOCKS_FL) {
 122 +               /* we don't support adding EOFBLOCKS flag */
 123 +               if (!(oldflags & EXT4_EOFBLOCKS_FL)) {
 124 +                       err = -EOPNOTSUPP;
 125 +                       goto flags_out;
 126 +               }
 127 +       } else if (oldflags & EXT4_EOFBLOCKS_FL)
 128 +               ext4_truncate(inode);
 129 +
 130 +       handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
 131 +       if (IS_ERR(handle)) {
 132 +               err = PTR_ERR(handle);
 133 +               goto flags_out;
 134 +       }
 135 +       if (IS_SYNC(inode))
 136 +               ext4_handle_sync(handle);
 137 +       err = ext4_reserve_inode_write(handle, inode, &iloc);
 138 +       if (err)
 139 +               goto flags_err;
 140 +
 141 +       for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
 142 +               if (!(mask & EXT4_FL_USER_MODIFIABLE))
 143 +                       continue;
 144 +               if (mask & flags)
 145 +                       ext4_set_inode_flag(inode, i);
 146 +               else
 147 +                       ext4_clear_inode_flag(inode, i);
 148 +       }
 149 +
 150 +       ext4_set_inode_flags(inode);
 151 +       inode->i_ctime = ext4_current_time(inode);
 152 +
 153 +       err = ext4_mark_iloc_dirty(handle, inode, &iloc);
 154 +flags_err:
 155 +       ext4_journal_stop(handle);
 156 +       if (err)
 157 +               goto flags_out;
 158 +
 159 +       if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL))
 160 +               err = ext4_change_inode_journal_flag(inode, jflag);
 161 +       if (err)
 162 +               goto flags_out;
 163 +       if (migrate) {
 164 +               if (flags & EXT4_EXTENTS_FL)
 165 +                       err = ext4_ext_migrate(inode);
 166 +               else
 167 +                       err = ext4_ind_migrate(inode);
 168 +       }
 169 +
 170 +flags_out:
 171 +       return err;
 172 +}
 173 +
 174 +#ifdef CONFIG_QUOTA
 175 +static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
 176 +{
 177 +       struct inode *inode = file_inode(filp);
 178 +       struct super_block *sb = inode->i_sb;
 179 +       struct ext4_inode_info *ei = EXT4_I(inode);
 180 +       int err, rc;
 181 +       handle_t *handle;
 182 +       kprojid_t kprojid;
 183 +       struct ext4_iloc iloc;
 184 +       struct ext4_inode *raw_inode;
 185 +       struct dquot *transfer_to[EXT4_MAXQUOTAS] = { };
 186 +
 187 +       if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
 188 +                       EXT4_FEATURE_RO_COMPAT_PROJECT)) {
 189 +               BUG_ON(__kprojid_val(EXT4_I(inode)->i_projid)
 190 +                      != EXT4_DEF_PROJID);
 191 +               if (projid != EXT4_DEF_PROJID)
 192 +                       return -EOPNOTSUPP;
 193 +               else
 194 +                       return 0;
 195 +       }
 196 +
 197 +       if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE)
 198 +               return -EOPNOTSUPP;
 199 +
 200 +       kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
 201 +
 202 +       if (projid_eq(kprojid, EXT4_I(inode)->i_projid))
 203 +               return 0;
 204 +
 205 +       err = mnt_want_write_file(filp);
 206 +       if (err)
 207 +               return err;
 208 +
 209 +       err = -EPERM;
 210 +       mutex_lock(&inode->i_mutex);
 211 +       /* Is it quota file? Do not allow user to mess with it */
 212 +       if (IS_NOQUOTA(inode))
 213 +               goto out_unlock;
 214 +
 215 +       err = ext4_get_inode_loc(inode, &iloc);
 216 +       if (err)
 217 +               goto out_unlock;
 218 +
 219 +       raw_inode = ext4_raw_inode(&iloc);
 220 +       if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) {
 221 +               err = -EOVERFLOW;
 222 +               brelse(iloc.bh);
 223 +               goto out_unlock;
 224 +       }
 225 +       brelse(iloc.bh);
 226 +
 227 +       dquot_initialize(inode);
 228 +
 229 +       handle = ext4_journal_start(inode, EXT4_HT_QUOTA,
 230 +               EXT4_QUOTA_INIT_BLOCKS(sb) +
 231 +               EXT4_QUOTA_DEL_BLOCKS(sb) + 3);
 232 +       if (IS_ERR(handle)) {
 233 +               err = PTR_ERR(handle);
 234 +               goto out_unlock;
 235 +       }
 236 +
 237 +       err = ext4_reserve_inode_write(handle, inode, &iloc);
 238 +       if (err)
 239 +               goto out_stop;
 240 +
 241 +       transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
 242 +       if (transfer_to[PRJQUOTA]) {
 243 +               err = __dquot_transfer(inode, transfer_to);
 244 +               dqput(transfer_to[PRJQUOTA]);
 245 +               if (err)
 246 +                       goto out_dirty;
 247 +       }
 248 +
 249 +       EXT4_I(inode)->i_projid = kprojid;
 250 +       inode->i_ctime = ext4_current_time(inode);
 251 +out_dirty:
 252 +       rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
 253 +       if (!err)
 254 +               err = rc;
 255 +out_stop:
 256 +       ext4_journal_stop(handle);
 257 +out_unlock:
 258 +       mutex_unlock(&inode->i_mutex);
 259 +       mnt_drop_write_file(filp);
 260 +       return err;
 261 +
 262 +
 263 +}
 264 +
 265 +#else
 266 +static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
 267 +{
 268 +       if (projid != EXT4_DEF_PROJID)
 269 +               return -EOPNOTSUPP;
 270 +       return 0;
 271 +}
 272 +#endif
 273 +
 274 +
 275 +/* Transfer internal flags to xflags */
 276 +static inline __u32 ext4_iflags_to_xflags(unsigned long iflags)
 277 +{
 278 +       __u32 xflags = 0;
 279 +
 280 +       if (iflags & EXT4_SYNC_FL)
 281 +               xflags |= FS_XFLAG_SYNC;
 282 +       if (iflags & EXT4_IMMUTABLE_FL)
 283 +               xflags |= FS_XFLAG_IMMUTABLE;
 284 +       if (iflags & EXT4_APPEND_FL)
 285 +               xflags |= FS_XFLAG_APPEND;
 286 +       if (iflags & EXT4_NODUMP_FL)
 287 +               xflags |= FS_XFLAG_NODUMP;
 288 +       if (iflags & EXT4_NOATIME_FL)
 289 +               xflags |= FS_XFLAG_NOATIME;
 290 +       if (iflags & EXT4_PROJINHERIT_FL)
 291 +               xflags |= FS_XFLAG_PROJINHERIT;
 292 +       return xflags;
 293 +}
 294 +
 295 +/* Transfer xflags flags to internal */
 296 +static inline unsigned long ext4_xflags_to_iflags(__u32 xflags)
 297 +{
 298 +       unsigned long iflags = 0;
 299 +
 300 +       if (xflags & FS_XFLAG_SYNC)
 301 +               iflags |= EXT4_SYNC_FL;
 302 +       if (xflags & FS_XFLAG_IMMUTABLE)
 303 +               iflags |= EXT4_IMMUTABLE_FL;
 304 +       if (xflags & FS_XFLAG_APPEND)
 305 +               iflags |= EXT4_APPEND_FL;
 306 +       if (xflags & FS_XFLAG_NODUMP)
 307 +               iflags |= EXT4_NODUMP_FL;
 308 +       if (xflags & FS_XFLAG_NOATIME)
 309 +               iflags |= EXT4_NOATIME_FL;
 310 +       if (xflags & FS_XFLAG_PROJINHERIT)
 311 +               iflags |= EXT4_PROJINHERIT_FL;
 312 +
 313 +       return iflags;
 314 +}
 315 +
 316  long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 317  {
 318         struct inode *inode = file_inode(filp);
 319 @@ -213,11 +502,7 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 320                 flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
 321                 return put_user(flags, (int __user *) arg);
 322         case EXT4_IOC_SETFLAGS: {
 323 -               handle_t *handle = NULL;
 324 -               int err, migrate = 0;
 325 -               struct ext4_iloc iloc;
 326 -               unsigned int oldflags, mask, i;
 327 -               unsigned int jflag;
 328 +               int err;
 329
 330                 if (!inode_owner_or_capable(inode))
 331                         return -EACCES;
 332 @@ -231,89 +516,8 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 333
 334                 flags = ext4_mask_flags(inode->i_mode, flags);
 335
 336 -               err = -EPERM;
 337                 mutex_lock(&inode->i_mutex);
 338 -               /* Is it quota file? Do not allow user to mess with it */
 339 -               if (IS_NOQUOTA(inode))
 340 -                       goto flags_out;
 341 -
 342 -               oldflags = ei->i_flags;
 343 -
 344 -               /* The JOURNAL_DATA flag is modifiable only by root */
 345 -               jflag = flags & EXT4_JOURNAL_DATA_FL;
 346 -
 347 -               /*
 348 -                * The IMMUTABLE and APPEND_ONLY flags can only be changed by
 349 -                * the relevant capability.
 350 -                *
 351 -                * This test looks nicer. Thanks to Pauline Middelink
 352 -                */
 353 -               if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) {
 354 -                       if (!capable(CAP_LINUX_IMMUTABLE))
 355 -                               goto flags_out;
 356 -               }
 357 -
 358 -               /*
 359 -                * The JOURNAL_DATA flag can only be changed by
 360 -                * the relevant capability.
 361 -                */
 362 -               if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
 363 -                       if (!capable(CAP_SYS_RESOURCE))
 364 -                               goto flags_out;
 365 -               }
 366 -               if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
 367 -                       migrate = 1;
 368 -
 369 -               if (flags & EXT4_EOFBLOCKS_FL) {
 370 -                       /* we don't support adding EOFBLOCKS flag */
 371 -                       if (!(oldflags & EXT4_EOFBLOCKS_FL)) {
 372 -                               err = -EOPNOTSUPP;
 373 -                               goto flags_out;
 374 -                       }
 375 -               } else if (oldflags & EXT4_EOFBLOCKS_FL)
 376 -                       ext4_truncate(inode);
 377 -
 378 -               handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
 379 -               if (IS_ERR(handle)) {
 380 -                       err = PTR_ERR(handle);
 381 -                       goto flags_out;
 382 -               }
 383 -               if (IS_SYNC(inode))
 384 -                       ext4_handle_sync(handle);
 385 -               err = ext4_reserve_inode_write(handle, inode, &iloc);
 386 -               if (err)
 387 -                       goto flags_err;
 388 -
 389 -               for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
 390 -                       if (!(mask & EXT4_FL_USER_MODIFIABLE))
 391 -                               continue;
 392 -                       if (mask & flags)
 393 -                               ext4_set_inode_flag(inode, i);
 394 -                       else
 395 -                               ext4_clear_inode_flag(inode, i);
 396 -               }
 397 -
 398 -               ext4_set_inode_flags(inode);
 399 -               inode->i_ctime = ext4_current_time(inode);
 400 -
 401 -               err = ext4_mark_iloc_dirty(handle, inode, &iloc);
 402 -flags_err:
 403 -               ext4_journal_stop(handle);
 404 -               if (err)
 405 -                       goto flags_out;
 406 -
 407 -               if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL))
 408 -                       err = ext4_change_inode_journal_flag(inode, jflag);
 409 -               if (err)
 410 -                       goto flags_out;
 411 -               if (migrate) {
 412 -                       if (flags & EXT4_EXTENTS_FL)
 413 -                               err = ext4_ext_migrate(inode);
 414 -                       else
 415 -                               err = ext4_ind_migrate(inode);
 416 -               }
 417 -
 418 -flags_out:
 419 +               err = ext4_ioctl_setflags(inode, flags);
 420                 mutex_unlock(&inode->i_mutex);
 421                 mnt_drop_write_file(filp);
 422                 return err;
 423 @@ -622,6 +826,62 @@ resizefs_out:
 424         }
 425         case EXT4_IOC_PRECACHE_EXTENTS:
 426                 return ext4_ext_precache(inode);
 427 +       case EXT4_IOC_FSGETXATTR:
 428 +       {
 429 +               struct fsxattr fa;
 430 +               unsigned int flags;
 431 +
 432 +               memset(&fa, 0, sizeof(struct fsxattr));
 433 +               ext4_get_inode_flags(ei);
 434 +               flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
 435 +               fa.fsx_xflags = ext4_iflags_to_xflags(flags);
 436 +
 437 +               if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
 438 +                               EXT4_FEATURE_RO_COMPAT_PROJECT)) {
 439 +                       fa.fsx_projid = (__u32)from_kprojid(&init_user_ns,
 440 +                               EXT4_I(inode)->i_projid);
 441 +               }
 442 +
 443 +               if (copy_to_user((struct fsxattr __user *)arg,
 444 +                                &fa, sizeof(fa)))
 445 +                       return -EFAULT;
 446 +               return 0;
 447 +       }
 448 +       case EXT4_IOC_FSSETXATTR:
 449 +       {
 450 +               struct fsxattr fa;
 451 +               int err;
 452 +
 453 +               if (copy_from_user(&fa, (struct fsxattr __user *)arg,
 454 +                                  sizeof(fa)))
 455 +                       return -EFAULT;
 456 +
 457 +               /* Make sure caller has proper permission */
 458 +               if (!inode_owner_or_capable(inode))
 459 +                       return -EACCES;
 460 +
 461 +               err = mnt_want_write_file(filp);
 462 +               if (err)
 463 +                       return err;
 464 +
 465 +               flags = ext4_xflags_to_iflags(fa.fsx_xflags);
 466 +               flags = ext4_mask_flags(inode->i_mode, flags);
 467 +
 468 +               mutex_lock(&inode->i_mutex);
 469 +               flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) |
 470 +                        (flags & EXT4_FL_XFLAG_VISIBLE);
 471 +               err = ext4_ioctl_setflags(inode, flags);
 472 +               mutex_unlock(&inode->i_mutex);
 473 +               mnt_drop_write_file(filp);
 474 +               if (err)
 475 +                       return err;
 476 +
 477 +               err = ext4_ioctl_setproject(filp, fa.fsx_projid);
 478 +               if (err)
 479 +                       return err;
 480 +
 481 +               return 0;
 482 +       }
 483
 484         default:
 485                 return -ENOTTY;