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vfs: teach vfs_ioc_fssetxattr_check to check extent size hints

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Move the extent size hint checks that aren't xfs-specific to the vfs.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Darrick J. Wong 2019-07-01 08:25:36 -07:00
parent f991492ed1
commit ca29be7534
2 changed files with 47 additions and 41 deletions
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18
fs/inode.c
View file

@ -2227,6 +2227,24 @@ int vfs_ioc_fssetxattr_check(struct inode *inode, const struct fsxattr *old_fa,
return -EINVAL;
}
/* Check extent size hints. */
if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(inode->i_mode))
return -EINVAL;
if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) &&
!S_ISDIR(inode->i_mode))
return -EINVAL;
if ((fa->fsx_xflags & FS_XFLAG_COWEXTSIZE) &&
!S_ISREG(inode->i_mode) && !S_ISDIR(inode->i_mode))
return -EINVAL;
/* Extent size hints of zero turn off the flags. */
if (fa->fsx_extsize == 0)
fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT);
if (fa->fsx_cowextsize == 0)
fa->fsx_xflags &= ~FS_XFLAG_COWEXTSIZE;
return 0;
}
EXPORT_SYMBOL(vfs_ioc_fssetxattr_check);

70
fs/xfs/xfs_ioctl.c
View file

@ -1200,39 +1200,31 @@ xfs_ioctl_setattr_check_extsize(
struct fsxattr *fa)
{
struct xfs_mount *mp = ip->i_mount;
if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode))
return -EINVAL;
if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) &&
!S_ISDIR(VFS_I(ip)->i_mode))
return -EINVAL;
xfs_extlen_t size;
xfs_fsblock_t extsize_fsb;
if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents &&
((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
return -EINVAL;
if (fa->fsx_extsize != 0) {
xfs_extlen_t size;
xfs_fsblock_t extsize_fsb;
if (fa->fsx_extsize == 0)
return 0;
extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
if (extsize_fsb > MAXEXTLEN)
extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
if (extsize_fsb > MAXEXTLEN)
return -EINVAL;
if (XFS_IS_REALTIME_INODE(ip) ||
(fa->fsx_xflags & FS_XFLAG_REALTIME)) {
size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
} else {
size = mp->m_sb.sb_blocksize;
if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
return -EINVAL;
}
if (XFS_IS_REALTIME_INODE(ip) ||
(fa->fsx_xflags & FS_XFLAG_REALTIME)) {
size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
} else {
size = mp->m_sb.sb_blocksize;
if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
return -EINVAL;
}
if (fa->fsx_extsize % size)
return -EINVAL;
} else
fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT);
if (fa->fsx_extsize % size)
return -EINVAL;
return 0;
}
@ -1258,6 +1250,8 @@ xfs_ioctl_setattr_check_cowextsize(
struct fsxattr *fa)
{
struct xfs_mount *mp = ip->i_mount;
xfs_extlen_t size;
xfs_fsblock_t cowextsize_fsb;
if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE))
return 0;
@ -1266,25 +1260,19 @@ xfs_ioctl_setattr_check_cowextsize(
ip->i_d.di_version != 3)
return -EINVAL;
if (!S_ISREG(VFS_I(ip)->i_mode) && !S_ISDIR(VFS_I(ip)->i_mode))
if (fa->fsx_cowextsize == 0)
return 0;
cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
if (cowextsize_fsb > MAXEXTLEN)
return -EINVAL;
if (fa->fsx_cowextsize != 0) {
xfs_extlen_t size;
xfs_fsblock_t cowextsize_fsb;
size = mp->m_sb.sb_blocksize;
if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2)
return -EINVAL;
cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
if (cowextsize_fsb > MAXEXTLEN)
return -EINVAL;
size = mp->m_sb.sb_blocksize;
if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2)
return -EINVAL;
if (fa->fsx_cowextsize % size)
return -EINVAL;
} else
fa->fsx_xflags &= ~FS_XFLAG_COWEXTSIZE;
if (fa->fsx_cowextsize % size)
return -EINVAL;
return 0;
}