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![Carlos Maiolino](/assets/img/avatar_default.png)
We can remove it now, without needing to rework the KM_ flags. Use kmem_cache_free() directly. Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
654 lines
18 KiB
C
654 lines
18 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*/
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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_format.h"
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#include "xfs_log_format.h"
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#include "xfs_trans_resv.h"
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#include "xfs_bit.h"
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#include "xfs_shared.h"
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#include "xfs_mount.h"
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#include "xfs_defer.h"
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#include "xfs_trans.h"
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#include "xfs_trans_priv.h"
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#include "xfs_extfree_item.h"
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#include "xfs_log.h"
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#include "xfs_btree.h"
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#include "xfs_rmap.h"
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#include "xfs_alloc.h"
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#include "xfs_bmap.h"
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#include "xfs_trace.h"
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#include "xfs_error.h"
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kmem_zone_t *xfs_efi_zone;
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kmem_zone_t *xfs_efd_zone;
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static inline struct xfs_efi_log_item *EFI_ITEM(struct xfs_log_item *lip)
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{
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return container_of(lip, struct xfs_efi_log_item, efi_item);
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}
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void
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xfs_efi_item_free(
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struct xfs_efi_log_item *efip)
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{
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kmem_free(efip->efi_item.li_lv_shadow);
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if (efip->efi_format.efi_nextents > XFS_EFI_MAX_FAST_EXTENTS)
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kmem_free(efip);
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else
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kmem_cache_free(xfs_efi_zone, efip);
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}
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/*
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* Freeing the efi requires that we remove it from the AIL if it has already
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* been placed there. However, the EFI may not yet have been placed in the AIL
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* when called by xfs_efi_release() from EFD processing due to the ordering of
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* committed vs unpin operations in bulk insert operations. Hence the reference
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* count to ensure only the last caller frees the EFI.
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*/
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void
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xfs_efi_release(
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struct xfs_efi_log_item *efip)
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{
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ASSERT(atomic_read(&efip->efi_refcount) > 0);
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if (atomic_dec_and_test(&efip->efi_refcount)) {
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xfs_trans_ail_remove(&efip->efi_item, SHUTDOWN_LOG_IO_ERROR);
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xfs_efi_item_free(efip);
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}
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}
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/*
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* This returns the number of iovecs needed to log the given efi item.
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* We only need 1 iovec for an efi item. It just logs the efi_log_format
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* structure.
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*/
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static inline int
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xfs_efi_item_sizeof(
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struct xfs_efi_log_item *efip)
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{
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return sizeof(struct xfs_efi_log_format) +
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(efip->efi_format.efi_nextents - 1) * sizeof(xfs_extent_t);
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}
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STATIC void
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xfs_efi_item_size(
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struct xfs_log_item *lip,
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int *nvecs,
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int *nbytes)
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{
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*nvecs += 1;
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*nbytes += xfs_efi_item_sizeof(EFI_ITEM(lip));
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}
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/*
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* This is called to fill in the vector of log iovecs for the
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* given efi log item. We use only 1 iovec, and we point that
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* at the efi_log_format structure embedded in the efi item.
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* It is at this point that we assert that all of the extent
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* slots in the efi item have been filled.
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*/
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STATIC void
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xfs_efi_item_format(
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struct xfs_log_item *lip,
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struct xfs_log_vec *lv)
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{
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struct xfs_efi_log_item *efip = EFI_ITEM(lip);
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struct xfs_log_iovec *vecp = NULL;
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ASSERT(atomic_read(&efip->efi_next_extent) ==
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efip->efi_format.efi_nextents);
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efip->efi_format.efi_type = XFS_LI_EFI;
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efip->efi_format.efi_size = 1;
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xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_EFI_FORMAT,
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&efip->efi_format,
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xfs_efi_item_sizeof(efip));
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}
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/*
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* The unpin operation is the last place an EFI is manipulated in the log. It is
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* either inserted in the AIL or aborted in the event of a log I/O error. In
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* either case, the EFI transaction has been successfully committed to make it
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* this far. Therefore, we expect whoever committed the EFI to either construct
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* and commit the EFD or drop the EFD's reference in the event of error. Simply
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* drop the log's EFI reference now that the log is done with it.
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*/
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STATIC void
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xfs_efi_item_unpin(
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struct xfs_log_item *lip,
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int remove)
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{
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struct xfs_efi_log_item *efip = EFI_ITEM(lip);
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xfs_efi_release(efip);
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}
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/*
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* The EFI has been either committed or aborted if the transaction has been
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* cancelled. If the transaction was cancelled, an EFD isn't going to be
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* constructed and thus we free the EFI here directly.
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*/
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STATIC void
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xfs_efi_item_release(
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struct xfs_log_item *lip)
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{
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xfs_efi_release(EFI_ITEM(lip));
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}
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static const struct xfs_item_ops xfs_efi_item_ops = {
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.iop_size = xfs_efi_item_size,
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.iop_format = xfs_efi_item_format,
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.iop_unpin = xfs_efi_item_unpin,
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.iop_release = xfs_efi_item_release,
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};
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/*
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* Allocate and initialize an efi item with the given number of extents.
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*/
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struct xfs_efi_log_item *
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xfs_efi_init(
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struct xfs_mount *mp,
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uint nextents)
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{
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struct xfs_efi_log_item *efip;
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uint size;
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ASSERT(nextents > 0);
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if (nextents > XFS_EFI_MAX_FAST_EXTENTS) {
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size = (uint)(sizeof(xfs_efi_log_item_t) +
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((nextents - 1) * sizeof(xfs_extent_t)));
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efip = kmem_zalloc(size, 0);
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} else {
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efip = kmem_zone_zalloc(xfs_efi_zone, 0);
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}
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xfs_log_item_init(mp, &efip->efi_item, XFS_LI_EFI, &xfs_efi_item_ops);
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efip->efi_format.efi_nextents = nextents;
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efip->efi_format.efi_id = (uintptr_t)(void *)efip;
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atomic_set(&efip->efi_next_extent, 0);
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atomic_set(&efip->efi_refcount, 2);
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return efip;
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}
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/*
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* Copy an EFI format buffer from the given buf, and into the destination
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* EFI format structure.
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* The given buffer can be in 32 bit or 64 bit form (which has different padding),
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* one of which will be the native format for this kernel.
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* It will handle the conversion of formats if necessary.
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*/
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int
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xfs_efi_copy_format(xfs_log_iovec_t *buf, xfs_efi_log_format_t *dst_efi_fmt)
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{
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xfs_efi_log_format_t *src_efi_fmt = buf->i_addr;
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uint i;
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uint len = sizeof(xfs_efi_log_format_t) +
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(src_efi_fmt->efi_nextents - 1) * sizeof(xfs_extent_t);
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uint len32 = sizeof(xfs_efi_log_format_32_t) +
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(src_efi_fmt->efi_nextents - 1) * sizeof(xfs_extent_32_t);
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uint len64 = sizeof(xfs_efi_log_format_64_t) +
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(src_efi_fmt->efi_nextents - 1) * sizeof(xfs_extent_64_t);
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if (buf->i_len == len) {
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memcpy((char *)dst_efi_fmt, (char*)src_efi_fmt, len);
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return 0;
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} else if (buf->i_len == len32) {
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xfs_efi_log_format_32_t *src_efi_fmt_32 = buf->i_addr;
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dst_efi_fmt->efi_type = src_efi_fmt_32->efi_type;
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dst_efi_fmt->efi_size = src_efi_fmt_32->efi_size;
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dst_efi_fmt->efi_nextents = src_efi_fmt_32->efi_nextents;
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dst_efi_fmt->efi_id = src_efi_fmt_32->efi_id;
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for (i = 0; i < dst_efi_fmt->efi_nextents; i++) {
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dst_efi_fmt->efi_extents[i].ext_start =
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src_efi_fmt_32->efi_extents[i].ext_start;
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dst_efi_fmt->efi_extents[i].ext_len =
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src_efi_fmt_32->efi_extents[i].ext_len;
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}
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return 0;
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} else if (buf->i_len == len64) {
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xfs_efi_log_format_64_t *src_efi_fmt_64 = buf->i_addr;
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dst_efi_fmt->efi_type = src_efi_fmt_64->efi_type;
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dst_efi_fmt->efi_size = src_efi_fmt_64->efi_size;
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dst_efi_fmt->efi_nextents = src_efi_fmt_64->efi_nextents;
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dst_efi_fmt->efi_id = src_efi_fmt_64->efi_id;
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for (i = 0; i < dst_efi_fmt->efi_nextents; i++) {
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dst_efi_fmt->efi_extents[i].ext_start =
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src_efi_fmt_64->efi_extents[i].ext_start;
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dst_efi_fmt->efi_extents[i].ext_len =
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src_efi_fmt_64->efi_extents[i].ext_len;
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}
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return 0;
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}
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XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW, NULL);
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return -EFSCORRUPTED;
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}
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static inline struct xfs_efd_log_item *EFD_ITEM(struct xfs_log_item *lip)
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{
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return container_of(lip, struct xfs_efd_log_item, efd_item);
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}
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STATIC void
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xfs_efd_item_free(struct xfs_efd_log_item *efdp)
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{
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kmem_free(efdp->efd_item.li_lv_shadow);
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if (efdp->efd_format.efd_nextents > XFS_EFD_MAX_FAST_EXTENTS)
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kmem_free(efdp);
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else
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kmem_cache_free(xfs_efd_zone, efdp);
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}
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/*
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* This returns the number of iovecs needed to log the given efd item.
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* We only need 1 iovec for an efd item. It just logs the efd_log_format
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* structure.
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*/
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static inline int
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xfs_efd_item_sizeof(
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struct xfs_efd_log_item *efdp)
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{
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return sizeof(xfs_efd_log_format_t) +
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(efdp->efd_format.efd_nextents - 1) * sizeof(xfs_extent_t);
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}
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STATIC void
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xfs_efd_item_size(
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struct xfs_log_item *lip,
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int *nvecs,
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int *nbytes)
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{
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*nvecs += 1;
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*nbytes += xfs_efd_item_sizeof(EFD_ITEM(lip));
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}
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/*
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* This is called to fill in the vector of log iovecs for the
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* given efd log item. We use only 1 iovec, and we point that
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* at the efd_log_format structure embedded in the efd item.
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* It is at this point that we assert that all of the extent
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* slots in the efd item have been filled.
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*/
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STATIC void
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xfs_efd_item_format(
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struct xfs_log_item *lip,
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struct xfs_log_vec *lv)
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{
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struct xfs_efd_log_item *efdp = EFD_ITEM(lip);
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struct xfs_log_iovec *vecp = NULL;
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ASSERT(efdp->efd_next_extent == efdp->efd_format.efd_nextents);
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efdp->efd_format.efd_type = XFS_LI_EFD;
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efdp->efd_format.efd_size = 1;
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xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_EFD_FORMAT,
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&efdp->efd_format,
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xfs_efd_item_sizeof(efdp));
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}
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/*
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* The EFD is either committed or aborted if the transaction is cancelled. If
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* the transaction is cancelled, drop our reference to the EFI and free the EFD.
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*/
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STATIC void
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xfs_efd_item_release(
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struct xfs_log_item *lip)
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{
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struct xfs_efd_log_item *efdp = EFD_ITEM(lip);
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xfs_efi_release(efdp->efd_efip);
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xfs_efd_item_free(efdp);
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}
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static const struct xfs_item_ops xfs_efd_item_ops = {
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.flags = XFS_ITEM_RELEASE_WHEN_COMMITTED,
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.iop_size = xfs_efd_item_size,
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.iop_format = xfs_efd_item_format,
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.iop_release = xfs_efd_item_release,
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};
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/*
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* Allocate an "extent free done" log item that will hold nextents worth of
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* extents. The caller must use all nextents extents, because we are not
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* flexible about this at all.
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*/
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static struct xfs_efd_log_item *
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xfs_trans_get_efd(
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struct xfs_trans *tp,
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struct xfs_efi_log_item *efip,
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unsigned int nextents)
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{
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struct xfs_efd_log_item *efdp;
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ASSERT(nextents > 0);
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if (nextents > XFS_EFD_MAX_FAST_EXTENTS) {
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efdp = kmem_zalloc(sizeof(struct xfs_efd_log_item) +
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(nextents - 1) * sizeof(struct xfs_extent),
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0);
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} else {
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efdp = kmem_zone_zalloc(xfs_efd_zone, 0);
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}
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xfs_log_item_init(tp->t_mountp, &efdp->efd_item, XFS_LI_EFD,
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&xfs_efd_item_ops);
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efdp->efd_efip = efip;
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efdp->efd_format.efd_nextents = nextents;
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efdp->efd_format.efd_efi_id = efip->efi_format.efi_id;
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xfs_trans_add_item(tp, &efdp->efd_item);
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return efdp;
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}
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/*
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* Free an extent and log it to the EFD. Note that the transaction is marked
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* dirty regardless of whether the extent free succeeds or fails to support the
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* EFI/EFD lifecycle rules.
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*/
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static int
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xfs_trans_free_extent(
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struct xfs_trans *tp,
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struct xfs_efd_log_item *efdp,
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xfs_fsblock_t start_block,
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xfs_extlen_t ext_len,
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const struct xfs_owner_info *oinfo,
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bool skip_discard)
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{
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struct xfs_mount *mp = tp->t_mountp;
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struct xfs_extent *extp;
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uint next_extent;
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xfs_agnumber_t agno = XFS_FSB_TO_AGNO(mp, start_block);
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xfs_agblock_t agbno = XFS_FSB_TO_AGBNO(mp,
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start_block);
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int error;
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trace_xfs_bmap_free_deferred(tp->t_mountp, agno, 0, agbno, ext_len);
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error = __xfs_free_extent(tp, start_block, ext_len,
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oinfo, XFS_AG_RESV_NONE, skip_discard);
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/*
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* Mark the transaction dirty, even on error. This ensures the
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* transaction is aborted, which:
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*
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* 1.) releases the EFI and frees the EFD
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* 2.) shuts down the filesystem
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*/
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tp->t_flags |= XFS_TRANS_DIRTY;
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set_bit(XFS_LI_DIRTY, &efdp->efd_item.li_flags);
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next_extent = efdp->efd_next_extent;
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ASSERT(next_extent < efdp->efd_format.efd_nextents);
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extp = &(efdp->efd_format.efd_extents[next_extent]);
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extp->ext_start = start_block;
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extp->ext_len = ext_len;
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efdp->efd_next_extent++;
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return error;
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}
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/* Sort bmap items by AG. */
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static int
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xfs_extent_free_diff_items(
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void *priv,
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struct list_head *a,
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struct list_head *b)
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{
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struct xfs_mount *mp = priv;
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struct xfs_extent_free_item *ra;
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struct xfs_extent_free_item *rb;
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ra = container_of(a, struct xfs_extent_free_item, xefi_list);
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rb = container_of(b, struct xfs_extent_free_item, xefi_list);
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return XFS_FSB_TO_AGNO(mp, ra->xefi_startblock) -
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XFS_FSB_TO_AGNO(mp, rb->xefi_startblock);
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}
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/* Get an EFI. */
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STATIC void *
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xfs_extent_free_create_intent(
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struct xfs_trans *tp,
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unsigned int count)
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{
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struct xfs_efi_log_item *efip;
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ASSERT(tp != NULL);
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ASSERT(count > 0);
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efip = xfs_efi_init(tp->t_mountp, count);
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ASSERT(efip != NULL);
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/*
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* Get a log_item_desc to point at the new item.
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*/
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xfs_trans_add_item(tp, &efip->efi_item);
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return efip;
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}
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/* Log a free extent to the intent item. */
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STATIC void
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xfs_extent_free_log_item(
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struct xfs_trans *tp,
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void *intent,
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struct list_head *item)
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{
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struct xfs_efi_log_item *efip = intent;
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struct xfs_extent_free_item *free;
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uint next_extent;
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struct xfs_extent *extp;
|
|
|
|
free = container_of(item, struct xfs_extent_free_item, xefi_list);
|
|
|
|
tp->t_flags |= XFS_TRANS_DIRTY;
|
|
set_bit(XFS_LI_DIRTY, &efip->efi_item.li_flags);
|
|
|
|
/*
|
|
* atomic_inc_return gives us the value after the increment;
|
|
* we want to use it as an array index so we need to subtract 1 from
|
|
* it.
|
|
*/
|
|
next_extent = atomic_inc_return(&efip->efi_next_extent) - 1;
|
|
ASSERT(next_extent < efip->efi_format.efi_nextents);
|
|
extp = &efip->efi_format.efi_extents[next_extent];
|
|
extp->ext_start = free->xefi_startblock;
|
|
extp->ext_len = free->xefi_blockcount;
|
|
}
|
|
|
|
/* Get an EFD so we can process all the free extents. */
|
|
STATIC void *
|
|
xfs_extent_free_create_done(
|
|
struct xfs_trans *tp,
|
|
void *intent,
|
|
unsigned int count)
|
|
{
|
|
return xfs_trans_get_efd(tp, intent, count);
|
|
}
|
|
|
|
/* Process a free extent. */
|
|
STATIC int
|
|
xfs_extent_free_finish_item(
|
|
struct xfs_trans *tp,
|
|
struct list_head *item,
|
|
void *done_item,
|
|
void **state)
|
|
{
|
|
struct xfs_extent_free_item *free;
|
|
int error;
|
|
|
|
free = container_of(item, struct xfs_extent_free_item, xefi_list);
|
|
error = xfs_trans_free_extent(tp, done_item,
|
|
free->xefi_startblock,
|
|
free->xefi_blockcount,
|
|
&free->xefi_oinfo, free->xefi_skip_discard);
|
|
kmem_free(free);
|
|
return error;
|
|
}
|
|
|
|
/* Abort all pending EFIs. */
|
|
STATIC void
|
|
xfs_extent_free_abort_intent(
|
|
void *intent)
|
|
{
|
|
xfs_efi_release(intent);
|
|
}
|
|
|
|
/* Cancel a free extent. */
|
|
STATIC void
|
|
xfs_extent_free_cancel_item(
|
|
struct list_head *item)
|
|
{
|
|
struct xfs_extent_free_item *free;
|
|
|
|
free = container_of(item, struct xfs_extent_free_item, xefi_list);
|
|
kmem_free(free);
|
|
}
|
|
|
|
const struct xfs_defer_op_type xfs_extent_free_defer_type = {
|
|
.max_items = XFS_EFI_MAX_FAST_EXTENTS,
|
|
.diff_items = xfs_extent_free_diff_items,
|
|
.create_intent = xfs_extent_free_create_intent,
|
|
.abort_intent = xfs_extent_free_abort_intent,
|
|
.log_item = xfs_extent_free_log_item,
|
|
.create_done = xfs_extent_free_create_done,
|
|
.finish_item = xfs_extent_free_finish_item,
|
|
.cancel_item = xfs_extent_free_cancel_item,
|
|
};
|
|
|
|
/*
|
|
* AGFL blocks are accounted differently in the reserve pools and are not
|
|
* inserted into the busy extent list.
|
|
*/
|
|
STATIC int
|
|
xfs_agfl_free_finish_item(
|
|
struct xfs_trans *tp,
|
|
struct list_head *item,
|
|
void *done_item,
|
|
void **state)
|
|
{
|
|
struct xfs_mount *mp = tp->t_mountp;
|
|
struct xfs_efd_log_item *efdp = done_item;
|
|
struct xfs_extent_free_item *free;
|
|
struct xfs_extent *extp;
|
|
struct xfs_buf *agbp;
|
|
int error;
|
|
xfs_agnumber_t agno;
|
|
xfs_agblock_t agbno;
|
|
uint next_extent;
|
|
|
|
free = container_of(item, struct xfs_extent_free_item, xefi_list);
|
|
ASSERT(free->xefi_blockcount == 1);
|
|
agno = XFS_FSB_TO_AGNO(mp, free->xefi_startblock);
|
|
agbno = XFS_FSB_TO_AGBNO(mp, free->xefi_startblock);
|
|
|
|
trace_xfs_agfl_free_deferred(mp, agno, 0, agbno, free->xefi_blockcount);
|
|
|
|
error = xfs_alloc_read_agf(mp, tp, agno, 0, &agbp);
|
|
if (!error)
|
|
error = xfs_free_agfl_block(tp, agno, agbno, agbp,
|
|
&free->xefi_oinfo);
|
|
|
|
/*
|
|
* Mark the transaction dirty, even on error. This ensures the
|
|
* transaction is aborted, which:
|
|
*
|
|
* 1.) releases the EFI and frees the EFD
|
|
* 2.) shuts down the filesystem
|
|
*/
|
|
tp->t_flags |= XFS_TRANS_DIRTY;
|
|
set_bit(XFS_LI_DIRTY, &efdp->efd_item.li_flags);
|
|
|
|
next_extent = efdp->efd_next_extent;
|
|
ASSERT(next_extent < efdp->efd_format.efd_nextents);
|
|
extp = &(efdp->efd_format.efd_extents[next_extent]);
|
|
extp->ext_start = free->xefi_startblock;
|
|
extp->ext_len = free->xefi_blockcount;
|
|
efdp->efd_next_extent++;
|
|
|
|
kmem_free(free);
|
|
return error;
|
|
}
|
|
|
|
/* sub-type with special handling for AGFL deferred frees */
|
|
const struct xfs_defer_op_type xfs_agfl_free_defer_type = {
|
|
.max_items = XFS_EFI_MAX_FAST_EXTENTS,
|
|
.diff_items = xfs_extent_free_diff_items,
|
|
.create_intent = xfs_extent_free_create_intent,
|
|
.abort_intent = xfs_extent_free_abort_intent,
|
|
.log_item = xfs_extent_free_log_item,
|
|
.create_done = xfs_extent_free_create_done,
|
|
.finish_item = xfs_agfl_free_finish_item,
|
|
.cancel_item = xfs_extent_free_cancel_item,
|
|
};
|
|
|
|
/*
|
|
* Process an extent free intent item that was recovered from
|
|
* the log. We need to free the extents that it describes.
|
|
*/
|
|
int
|
|
xfs_efi_recover(
|
|
struct xfs_mount *mp,
|
|
struct xfs_efi_log_item *efip)
|
|
{
|
|
struct xfs_efd_log_item *efdp;
|
|
struct xfs_trans *tp;
|
|
int i;
|
|
int error = 0;
|
|
xfs_extent_t *extp;
|
|
xfs_fsblock_t startblock_fsb;
|
|
|
|
ASSERT(!test_bit(XFS_EFI_RECOVERED, &efip->efi_flags));
|
|
|
|
/*
|
|
* First check the validity of the extents described by the
|
|
* EFI. If any are bad, then assume that all are bad and
|
|
* just toss the EFI.
|
|
*/
|
|
for (i = 0; i < efip->efi_format.efi_nextents; i++) {
|
|
extp = &efip->efi_format.efi_extents[i];
|
|
startblock_fsb = XFS_BB_TO_FSB(mp,
|
|
XFS_FSB_TO_DADDR(mp, extp->ext_start));
|
|
if (startblock_fsb == 0 ||
|
|
extp->ext_len == 0 ||
|
|
startblock_fsb >= mp->m_sb.sb_dblocks ||
|
|
extp->ext_len >= mp->m_sb.sb_agblocks) {
|
|
/*
|
|
* This will pull the EFI from the AIL and
|
|
* free the memory associated with it.
|
|
*/
|
|
set_bit(XFS_EFI_RECOVERED, &efip->efi_flags);
|
|
xfs_efi_release(efip);
|
|
return -EFSCORRUPTED;
|
|
}
|
|
}
|
|
|
|
error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp);
|
|
if (error)
|
|
return error;
|
|
efdp = xfs_trans_get_efd(tp, efip, efip->efi_format.efi_nextents);
|
|
|
|
for (i = 0; i < efip->efi_format.efi_nextents; i++) {
|
|
extp = &efip->efi_format.efi_extents[i];
|
|
error = xfs_trans_free_extent(tp, efdp, extp->ext_start,
|
|
extp->ext_len,
|
|
&XFS_RMAP_OINFO_ANY_OWNER, false);
|
|
if (error)
|
|
goto abort_error;
|
|
|
|
}
|
|
|
|
set_bit(XFS_EFI_RECOVERED, &efip->efi_flags);
|
|
error = xfs_trans_commit(tp);
|
|
return error;
|
|
|
|
abort_error:
|
|
xfs_trans_cancel(tp);
|
|
return error;
|
|
}
|