xfs: don't allow insert-range to shift extents past the maximum offset

[thirdparty/xfsprogs-dev.git] / libxfs / xfs_format.h

diff --git a/libxfs/xfs_format.h b/libxfs/xfs_format.h
index 4ab4f9b70d3a0efa86c37e3d709463d259ef1921..be3a3bf92a5a35642a769bd4736cf845b44ebd90 100644 (file)
--- a/libxfs/xfs_format.h
+++ b/libxfs/xfs_format.h
@@ -1,19 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (c) 2000-2005 Silicon Graphics, Inc.
  * All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write the Free Software Foundation,
- * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  */
 #ifndef __XFS_FORMAT_H__
 #define __XFS_FORMAT_H__
@@ -98,6 +86,9 @@ struct xfs_ifork;
         XFS_SB_VERSION2_PROJID32BIT    | \
         XFS_SB_VERSION2_FTYPE)
 
+/* Maximum size of the xfs filesystem label, no terminating NULL */
+#define XFSLABEL_MAX                   12
+
 /*
  * Superblock - in core version.  Must match the ondisk version below.
  * Must be padded to 64 bit alignment.
@@ -122,7 +113,7 @@ typedef struct xfs_sb {
        uint16_t        sb_sectsize;    /* volume sector size, bytes */
        uint16_t        sb_inodesize;   /* inode size, bytes */
        uint16_t        sb_inopblock;   /* inodes per block */
-       char            sb_fname[12];   /* file system name */
+       char            sb_fname[XFSLABEL_MAX]; /* file system name */
        uint8_t         sb_blocklog;    /* log2 of sb_blocksize */
        uint8_t         sb_sectlog;     /* log2 of sb_sectsize */
        uint8_t         sb_inodelog;    /* log2 of sb_inodesize */
@@ -213,7 +204,7 @@ typedef struct xfs_dsb {
        __be16          sb_sectsize;    /* volume sector size, bytes */
        __be16          sb_inodesize;   /* inode size, bytes */
        __be16          sb_inopblock;   /* inodes per block */
-       char            sb_fname[12];   /* file system name */
+       char            sb_fname[XFSLABEL_MAX]; /* file system name */
        __u8            sb_blocklog;    /* log2 of sb_blocksize */
        __u8            sb_sectlog;     /* log2 of sb_sectsize */
        __u8            sb_inodelog;    /* log2 of sb_inodesize */
@@ -803,24 +794,13 @@ typedef struct xfs_agi {
                &(XFS_BUF_TO_AGFL(bp)->agfl_bno[0]) : \
                (__be32 *)(bp)->b_addr)
 
-/*
- * Size of the AGFL.  For CRC-enabled filesystes we steal a couple of
- * slots in the beginning of the block for a proper header with the
- * location information and CRC.
- */
-#define XFS_AGFL_SIZE(mp) \
-       (((mp)->m_sb.sb_sectsize - \
-        (xfs_sb_version_hascrc(&((mp)->m_sb)) ? \
-               sizeof(struct xfs_agfl) : 0)) / \
-         sizeof(xfs_agblock_t))
-
 typedef struct xfs_agfl {
        __be32          agfl_magicnum;
        __be32          agfl_seqno;
        uuid_t          agfl_uuid;
        __be64          agfl_lsn;
        __be32          agfl_crc;
-       __be32          agfl_bno[];     /* actually XFS_AGFL_SIZE(mp) */
+       __be32          agfl_bno[];     /* actually xfs_agfl_size(mp) */
 } __attribute__((packed)) xfs_agfl_t;
 
 #define XFS_AGFL_CRC_OFF       offsetof(struct xfs_agfl, agfl_crc)
@@ -982,6 +962,9 @@ typedef enum xfs_dinode_fmt {
                XFS_DFORK_DSIZE(dip, mp) : \
                XFS_DFORK_ASIZE(dip, mp))
 
+#define XFS_DFORK_MAXEXT(dip, mp, w) \
+       (XFS_DFORK_SIZE(dip, mp, w) / sizeof(struct xfs_bmbt_rec))
+
 /*
  * Return pointers to the data or attribute forks.
  */
@@ -1546,6 +1529,8 @@ typedef struct xfs_bmdr_block {
 #define BMBT_STARTBLOCK_BITLEN 52
 #define BMBT_BLOCKCOUNT_BITLEN 21
 
+#define BMBT_STARTOFF_MASK     ((1ULL << BMBT_STARTOFF_BITLEN) - 1)
+
 typedef struct xfs_bmbt_rec {
        __be64                  l0, l1;
 } xfs_bmbt_rec_t;
@@ -1577,24 +1562,6 @@ static inline xfs_filblks_t startblockval(xfs_fsblock_t x)
        return (xfs_filblks_t)((x) & ~STARTBLOCKMASK);
 }
 
-/*
- * Possible extent states.
- */
-typedef enum {
-       XFS_EXT_NORM, XFS_EXT_UNWRITTEN,
-} xfs_exntst_t;
-
-/*
- * Incore version of above.
- */
-typedef struct xfs_bmbt_irec
-{
-       xfs_fileoff_t   br_startoff;    /* starting file offset */
-       xfs_fsblock_t   br_startblock;  /* starting block number */
-       xfs_filblks_t   br_blockcount;  /* number of blocks */
-       xfs_exntst_t    br_state;       /* extent state */
-} xfs_bmbt_irec_t;
-
 /*
  * Key structure for non-leaf levels of the tree.
  */