xfs: fold xfs_change_file_space into xfs_ioc_space
Now that only one caller of xfs_change_file_space is left it can be merged
into said caller.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 4528741..e448d73 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -641,7 +641,11 @@
unsigned int cmd,
xfs_flock64_t *bf)
{
- int attr_flags = 0;
+ struct xfs_mount *mp = ip->i_mount;
+ struct xfs_trans *tp;
+ struct iattr iattr;
+ bool setprealloc = false;
+ bool clrprealloc = false;
int error;
/*
@@ -661,17 +665,127 @@
if (!S_ISREG(inode->i_mode))
return -XFS_ERROR(EINVAL);
- if (filp->f_flags & O_DSYNC)
- attr_flags |= XFS_ATTR_SYNC;
-
- if (ioflags & IO_INVIS)
- attr_flags |= XFS_ATTR_DMI;
-
error = mnt_want_write_file(filp);
if (error)
return error;
+
xfs_ilock(ip, XFS_IOLOCK_EXCL);
- error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
+
+ switch (bf->l_whence) {
+ case 0: /*SEEK_SET*/
+ break;
+ case 1: /*SEEK_CUR*/
+ bf->l_start += filp->f_pos;
+ break;
+ case 2: /*SEEK_END*/
+ bf->l_start += XFS_ISIZE(ip);
+ break;
+ default:
+ error = XFS_ERROR(EINVAL);
+ goto out_unlock;
+ }
+
+ /*
+ * length of <= 0 for resv/unresv/zero is invalid. length for
+ * alloc/free is ignored completely and we have no idea what userspace
+ * might have set it to, so set it to zero to allow range
+ * checks to pass.
+ */
+ switch (cmd) {
+ case XFS_IOC_ZERO_RANGE:
+ case XFS_IOC_RESVSP:
+ case XFS_IOC_RESVSP64:
+ case XFS_IOC_UNRESVSP:
+ case XFS_IOC_UNRESVSP64:
+ if (bf->l_len <= 0) {
+ error = XFS_ERROR(EINVAL);
+ goto out_unlock;
+ }
+ break;
+ default:
+ bf->l_len = 0;
+ break;
+ }
+
+ if (bf->l_start < 0 ||
+ bf->l_start > mp->m_super->s_maxbytes ||
+ bf->l_start + bf->l_len < 0 ||
+ bf->l_start + bf->l_len >= mp->m_super->s_maxbytes) {
+ error = XFS_ERROR(EINVAL);
+ goto out_unlock;
+ }
+
+ switch (cmd) {
+ case XFS_IOC_ZERO_RANGE:
+ error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
+ if (!error)
+ setprealloc = true;
+ break;
+ case XFS_IOC_RESVSP:
+ case XFS_IOC_RESVSP64:
+ error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
+ XFS_BMAPI_PREALLOC);
+ if (!error)
+ setprealloc = true;
+ break;
+ case XFS_IOC_UNRESVSP:
+ case XFS_IOC_UNRESVSP64:
+ error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
+ break;
+ case XFS_IOC_ALLOCSP:
+ case XFS_IOC_ALLOCSP64:
+ case XFS_IOC_FREESP:
+ case XFS_IOC_FREESP64:
+ if (bf->l_start > XFS_ISIZE(ip)) {
+ error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
+ bf->l_start - XFS_ISIZE(ip), 0);
+ if (error)
+ goto out_unlock;
+ }
+
+ iattr.ia_valid = ATTR_SIZE;
+ iattr.ia_size = bf->l_start;
+
+ error = xfs_setattr_size(ip, &iattr);
+ if (!error)
+ clrprealloc = true;
+ break;
+ default:
+ ASSERT(0);
+ error = XFS_ERROR(EINVAL);
+ }
+
+ if (error)
+ goto out_unlock;
+
+ tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID);
+ error = xfs_trans_reserve(tp, &M_RES(mp)->tr_writeid, 0, 0);
+ if (error) {
+ xfs_trans_cancel(tp, 0);
+ goto out_unlock;
+ }
+
+ xfs_ilock(ip, XFS_ILOCK_EXCL);
+ xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
+
+ if (!(ioflags & IO_INVIS)) {
+ ip->i_d.di_mode &= ~S_ISUID;
+ if (ip->i_d.di_mode & S_IXGRP)
+ ip->i_d.di_mode &= ~S_ISGID;
+ xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
+ }
+
+ if (setprealloc)
+ ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC;
+ else if (clrprealloc)
+ ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC;
+
+ xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
+ if (filp->f_flags & O_DSYNC)
+ xfs_trans_set_sync(tp);
+ error = xfs_trans_commit(tp, 0);
+
+out_unlock:
xfs_iunlock(ip, XFS_IOLOCK_EXCL);
mnt_drop_write_file(filp);
return -error;