struct xfs_bmbt_irec *imap,
bool *shared)
{
- struct xfs_bmbt_irec got, prev;
- xfs_fileoff_t end_fsb, orig_end_fsb;
- int eof = 0, error = 0;
- bool trimmed;
+ struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_COW_FORK);
+ struct xfs_bmbt_irec got;
+ int error = 0;
+ bool eof = false, trimmed;
xfs_extnum_t idx;
- xfs_extlen_t align;
/*
* Search the COW fork extent list first. This serves two purposes:
* extent list is generally faster than going out to the shared extent
* tree.
*/
- xfs_bmap_search_extents(ip, imap->br_startoff, XFS_COW_FORK, &eof, &idx,
- &got, &prev);
+
+ if (!xfs_iext_lookup_extent(ip, ifp, imap->br_startoff, &idx, &got))
+ eof = true;
if (!eof && got.br_startoff <= imap->br_startoff) {
trace_xfs_reflink_cow_found(ip, imap);
xfs_trim_extent(imap, got.br_startoff, got.br_blockcount);
if (error)
return error;
- end_fsb = orig_end_fsb = imap->br_startoff + imap->br_blockcount;
-
- align = xfs_eof_alignment(ip, xfs_get_cowextsz_hint(ip));
- if (align)
- end_fsb = roundup_64(end_fsb, align);
-
-retry:
error = xfs_bmapi_reserve_delalloc(ip, XFS_COW_FORK, imap->br_startoff,
- end_fsb - imap->br_startoff, &got, &prev, &idx, eof);
- switch (error) {
- case 0:
- break;
- case -ENOSPC:
- case -EDQUOT:
- /* retry without any preallocation */
+ imap->br_blockcount, 0, &got, &idx, eof);
+ if (error == -ENOSPC || error == -EDQUOT)
trace_xfs_reflink_cow_enospc(ip, imap);
- if (end_fsb != orig_end_fsb) {
- end_fsb = orig_end_fsb;
- goto retry;
- }
- /*FALLTHRU*/
- default:
+ if (error)
return error;
- }
-
- if (end_fsb != orig_end_fsb)
- xfs_inode_set_cowblocks_tag(ip);
trace_xfs_reflink_cow_alloc(ip, &got);
return 0;
}
/*
- * Find the CoW reservation (and whether or not it needs block allocation)
- * for a given byte offset of a file.
+ * Find the CoW reservation for a given byte offset of a file.
*/
bool
xfs_reflink_find_cow_mapping(
struct xfs_inode *ip,
xfs_off_t offset,
- struct xfs_bmbt_irec *imap,
- bool *need_alloc)
+ struct xfs_bmbt_irec *imap)
{
- struct xfs_bmbt_irec irec;
- struct xfs_ifork *ifp;
- struct xfs_bmbt_rec_host *gotp;
- xfs_fileoff_t bno;
+ struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_COW_FORK);
+ xfs_fileoff_t offset_fsb;
+ struct xfs_bmbt_irec got;
xfs_extnum_t idx;
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL | XFS_ILOCK_SHARED));
ASSERT(xfs_is_reflink_inode(ip));
- /* Find the extent in the CoW fork. */
- ifp = XFS_IFORK_PTR(ip, XFS_COW_FORK);
- bno = XFS_B_TO_FSBT(ip->i_mount, offset);
- gotp = xfs_iext_bno_to_ext(ifp, bno, &idx);
- if (!gotp)
+ offset_fsb = XFS_B_TO_FSBT(ip->i_mount, offset);
+ if (!xfs_iext_lookup_extent(ip, ifp, offset_fsb, &idx, &got))
return false;
-
- xfs_bmbt_get_all(gotp, &irec);
- if (bno >= irec.br_startoff + irec.br_blockcount ||
- bno < irec.br_startoff)
+ if (got.br_startoff > offset_fsb)
return false;
trace_xfs_reflink_find_cow_mapping(ip, offset, 1, XFS_IO_OVERWRITE,
- &irec);
-
- /* If it's still delalloc, we must allocate later. */
- *imap = irec;
- *need_alloc = !!(isnullstartblock(irec.br_startblock));
-
+ &got);
+ *imap = got;
return true;
}
/*
* Trim an extent to end at the next CoW reservation past offset_fsb.
*/
-int
+void
xfs_reflink_trim_irec_to_next_cow(
struct xfs_inode *ip,
xfs_fileoff_t offset_fsb,
struct xfs_bmbt_irec *imap)
{
- struct xfs_bmbt_irec irec;
- struct xfs_ifork *ifp;
- struct xfs_bmbt_rec_host *gotp;
+ struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_COW_FORK);
+ struct xfs_bmbt_irec got;
xfs_extnum_t idx;
if (!xfs_is_reflink_inode(ip))
- return 0;
+ return;
/* Find the extent in the CoW fork. */
- ifp = XFS_IFORK_PTR(ip, XFS_COW_FORK);
- gotp = xfs_iext_bno_to_ext(ifp, offset_fsb, &idx);
- if (!gotp)
- return 0;
- xfs_bmbt_get_all(gotp, &irec);
+ if (!xfs_iext_lookup_extent(ip, ifp, offset_fsb, &idx, &got))
+ return;
/* This is the extent before; try sliding up one. */
- if (irec.br_startoff < offset_fsb) {
- idx++;
- if (idx >= ifp->if_bytes / sizeof(xfs_bmbt_rec_t))
- return 0;
- gotp = xfs_iext_get_ext(ifp, idx);
- xfs_bmbt_get_all(gotp, &irec);
+ if (got.br_startoff < offset_fsb) {
+ if (!xfs_iext_get_extent(ifp, idx + 1, &got))
+ return;
}
- if (irec.br_startoff >= imap->br_startoff + imap->br_blockcount)
- return 0;
+ if (got.br_startoff >= imap->br_startoff + imap->br_blockcount)
+ return;
- imap->br_blockcount = irec.br_startoff - imap->br_startoff;
+ imap->br_blockcount = got.br_startoff - imap->br_startoff;
trace_xfs_reflink_trim_irec(ip, imap);
-
- return 0;
}
/*
xfs_fileoff_t end_fsb)
{
struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_COW_FORK);
- struct xfs_bmbt_irec got, prev, del;
+ struct xfs_bmbt_irec got, del;
xfs_extnum_t idx;
xfs_fsblock_t firstfsb;
struct xfs_defer_ops dfops;
- int error = 0, eof = 0;
+ int error = 0;
if (!xfs_is_reflink_inode(ip))
return 0;
-
- xfs_bmap_search_extents(ip, offset_fsb, XFS_COW_FORK, &eof, &idx,
- &got, &prev);
- if (eof)
+ if (!xfs_iext_lookup_extent(ip, ifp, offset_fsb, &idx, &got))
return 0;
while (got.br_startoff < end_fsb) {
xfs_bmap_del_extent_cow(ip, &idx, &got, &del);
}
- if (++idx >= ifp->if_bytes / sizeof(struct xfs_bmbt_rec))
+ if (!xfs_iext_get_extent(ifp, ++idx, &got))
break;
- xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx), &got);
}
/* clear tag if cow fork is emptied */
xfs_off_t count)
{
struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_COW_FORK);
- struct xfs_bmbt_irec got, prev, del;
+ struct xfs_bmbt_irec got, del;
struct xfs_trans *tp;
xfs_fileoff_t offset_fsb;
xfs_fileoff_t end_fsb;
xfs_fsblock_t firstfsb;
struct xfs_defer_ops dfops;
- int error, eof = 0;
+ int error;
unsigned int resblks;
xfs_filblks_t rlen;
xfs_extnum_t idx;
xfs_ilock(ip, XFS_ILOCK_EXCL);
xfs_trans_ijoin(tp, ip, 0);
- xfs_bmap_search_extents(ip, end_fsb - 1, XFS_COW_FORK, &eof, &idx,
- &got, &prev);
-
/* If there is a hole at end_fsb - 1 go to the previous extent */
- if (eof || got.br_startoff > end_fsb) {
+ if (!xfs_iext_lookup_extent(ip, ifp, end_fsb - 1, &idx, &got) ||
+ got.br_startoff > end_fsb) {
ASSERT(idx > 0);
- xfs_bmbt_get_all(xfs_iext_get_ext(ifp, --idx), &got);
+ xfs_iext_get_extent(ifp, --idx, &got);
}
/* Walk backwards until we're out of the I/O range... */
error = xfs_defer_finish(&tp, &dfops, ip);
if (error)
goto out_defer;
-
next_extent:
- if (idx < 0)
+ if (!xfs_iext_get_extent(ifp, idx, &got))
break;
- xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx), &got);
}
error = xfs_trans_commit(tp);
return -EIO;
/* Lock both files against IO */
- if (same_inode) {
- xfs_ilock(src, XFS_IOLOCK_EXCL);
+ lock_two_nondirectories(inode_in, inode_out);
+ if (same_inode)
xfs_ilock(src, XFS_MMAPLOCK_EXCL);
- } else {
- xfs_lock_two_inodes(src, dest, XFS_IOLOCK_EXCL);
+ else
xfs_lock_two_inodes(src, dest, XFS_MMAPLOCK_EXCL);
- }
/* Check file eligibility and prepare for block sharing. */
ret = -EINVAL;
ret = vfs_clone_file_prep_inodes(inode_in, pos_in, inode_out, pos_out,
&len, is_dedupe);
- if (ret || len == 0)
+ if (ret <= 0)
goto out_unlock;
trace_xfs_reflink_remap_range(src, pos_in, len, dest, pos_out);
out_unlock:
xfs_iunlock(src, XFS_MMAPLOCK_EXCL);
- xfs_iunlock(src, XFS_IOLOCK_EXCL);
- if (src->i_ino != dest->i_ino) {
+ if (!same_inode)
xfs_iunlock(dest, XFS_MMAPLOCK_EXCL);
- xfs_iunlock(dest, XFS_IOLOCK_EXCL);
- }
+ unlock_two_nondirectories(inode_in, inode_out);
if (ret)
trace_xfs_reflink_remap_range_error(dest, ret, _RET_IP_);
return ret;
trace_xfs_reflink_unshare_error(ip, error, _RET_IP_);
return error;
}
-
-/*
- * Does this inode have any real CoW reservations?
- */
-bool
-xfs_reflink_has_real_cow_blocks(
- struct xfs_inode *ip)
-{
- struct xfs_bmbt_irec irec;
- struct xfs_ifork *ifp;
- struct xfs_bmbt_rec_host *gotp;
- xfs_extnum_t idx;
-
- if (!xfs_is_reflink_inode(ip))
- return false;
-
- /* Go find the old extent in the CoW fork. */
- ifp = XFS_IFORK_PTR(ip, XFS_COW_FORK);
- gotp = xfs_iext_bno_to_ext(ifp, 0, &idx);
- while (gotp) {
- xfs_bmbt_get_all(gotp, &irec);
-
- if (!isnullstartblock(irec.br_startblock))
- return true;
-
- /* Roll on... */
- idx++;
- if (idx >= ifp->if_bytes / sizeof(xfs_bmbt_rec_t))
- break;
- gotp = xfs_iext_get_ext(ifp, idx);
- }
-
- return false;
-}
projects / karo-tx-linux.git / blobdiff