mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-06 01:16:42 +07:00
ac75a1f7a4
While the verifier routines may return EFSBADCRC when a buffer has a bad CRC, we need to translate that to EFSCORRUPTED so that the higher layers treat the error appropriately and we return a consistent error to userspace. This fixes a xfs/005 regression. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
884 lines
24 KiB
C
884 lines
24 KiB
C
/*
|
|
* Copyright (c) 2000-2002,2005 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
|
|
*/
|
|
#include "xfs.h"
|
|
#include "xfs_fs.h"
|
|
#include "xfs_shared.h"
|
|
#include "xfs_format.h"
|
|
#include "xfs_log_format.h"
|
|
#include "xfs_trans_resv.h"
|
|
#include "xfs_sb.h"
|
|
#include "xfs_ag.h"
|
|
#include "xfs_mount.h"
|
|
#include "xfs_inode.h"
|
|
#include "xfs_trans.h"
|
|
#include "xfs_buf_item.h"
|
|
#include "xfs_trans_priv.h"
|
|
#include "xfs_error.h"
|
|
#include "xfs_trace.h"
|
|
|
|
/*
|
|
* Check to see if a buffer matching the given parameters is already
|
|
* a part of the given transaction.
|
|
*/
|
|
STATIC struct xfs_buf *
|
|
xfs_trans_buf_item_match(
|
|
struct xfs_trans *tp,
|
|
struct xfs_buftarg *target,
|
|
struct xfs_buf_map *map,
|
|
int nmaps)
|
|
{
|
|
struct xfs_log_item_desc *lidp;
|
|
struct xfs_buf_log_item *blip;
|
|
int len = 0;
|
|
int i;
|
|
|
|
for (i = 0; i < nmaps; i++)
|
|
len += map[i].bm_len;
|
|
|
|
list_for_each_entry(lidp, &tp->t_items, lid_trans) {
|
|
blip = (struct xfs_buf_log_item *)lidp->lid_item;
|
|
if (blip->bli_item.li_type == XFS_LI_BUF &&
|
|
blip->bli_buf->b_target == target &&
|
|
XFS_BUF_ADDR(blip->bli_buf) == map[0].bm_bn &&
|
|
blip->bli_buf->b_length == len) {
|
|
ASSERT(blip->bli_buf->b_map_count == nmaps);
|
|
return blip->bli_buf;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Add the locked buffer to the transaction.
|
|
*
|
|
* The buffer must be locked, and it cannot be associated with any
|
|
* transaction.
|
|
*
|
|
* If the buffer does not yet have a buf log item associated with it,
|
|
* then allocate one for it. Then add the buf item to the transaction.
|
|
*/
|
|
STATIC void
|
|
_xfs_trans_bjoin(
|
|
struct xfs_trans *tp,
|
|
struct xfs_buf *bp,
|
|
int reset_recur)
|
|
{
|
|
struct xfs_buf_log_item *bip;
|
|
|
|
ASSERT(bp->b_transp == NULL);
|
|
|
|
/*
|
|
* The xfs_buf_log_item pointer is stored in b_fsprivate. If
|
|
* it doesn't have one yet, then allocate one and initialize it.
|
|
* The checks to see if one is there are in xfs_buf_item_init().
|
|
*/
|
|
xfs_buf_item_init(bp, tp->t_mountp);
|
|
bip = bp->b_fspriv;
|
|
ASSERT(!(bip->bli_flags & XFS_BLI_STALE));
|
|
ASSERT(!(bip->__bli_format.blf_flags & XFS_BLF_CANCEL));
|
|
ASSERT(!(bip->bli_flags & XFS_BLI_LOGGED));
|
|
if (reset_recur)
|
|
bip->bli_recur = 0;
|
|
|
|
/*
|
|
* Take a reference for this transaction on the buf item.
|
|
*/
|
|
atomic_inc(&bip->bli_refcount);
|
|
|
|
/*
|
|
* Get a log_item_desc to point at the new item.
|
|
*/
|
|
xfs_trans_add_item(tp, &bip->bli_item);
|
|
|
|
/*
|
|
* Initialize b_fsprivate2 so we can find it with incore_match()
|
|
* in xfs_trans_get_buf() and friends above.
|
|
*/
|
|
bp->b_transp = tp;
|
|
|
|
}
|
|
|
|
void
|
|
xfs_trans_bjoin(
|
|
struct xfs_trans *tp,
|
|
struct xfs_buf *bp)
|
|
{
|
|
_xfs_trans_bjoin(tp, bp, 0);
|
|
trace_xfs_trans_bjoin(bp->b_fspriv);
|
|
}
|
|
|
|
/*
|
|
* Get and lock the buffer for the caller if it is not already
|
|
* locked within the given transaction. If it is already locked
|
|
* within the transaction, just increment its lock recursion count
|
|
* and return a pointer to it.
|
|
*
|
|
* If the transaction pointer is NULL, make this just a normal
|
|
* get_buf() call.
|
|
*/
|
|
struct xfs_buf *
|
|
xfs_trans_get_buf_map(
|
|
struct xfs_trans *tp,
|
|
struct xfs_buftarg *target,
|
|
struct xfs_buf_map *map,
|
|
int nmaps,
|
|
xfs_buf_flags_t flags)
|
|
{
|
|
xfs_buf_t *bp;
|
|
xfs_buf_log_item_t *bip;
|
|
|
|
if (!tp)
|
|
return xfs_buf_get_map(target, map, nmaps, flags);
|
|
|
|
/*
|
|
* If we find the buffer in the cache with this transaction
|
|
* pointer in its b_fsprivate2 field, then we know we already
|
|
* have it locked. In this case we just increment the lock
|
|
* recursion count and return the buffer to the caller.
|
|
*/
|
|
bp = xfs_trans_buf_item_match(tp, target, map, nmaps);
|
|
if (bp != NULL) {
|
|
ASSERT(xfs_buf_islocked(bp));
|
|
if (XFS_FORCED_SHUTDOWN(tp->t_mountp)) {
|
|
xfs_buf_stale(bp);
|
|
XFS_BUF_DONE(bp);
|
|
}
|
|
|
|
ASSERT(bp->b_transp == tp);
|
|
bip = bp->b_fspriv;
|
|
ASSERT(bip != NULL);
|
|
ASSERT(atomic_read(&bip->bli_refcount) > 0);
|
|
bip->bli_recur++;
|
|
trace_xfs_trans_get_buf_recur(bip);
|
|
return (bp);
|
|
}
|
|
|
|
bp = xfs_buf_get_map(target, map, nmaps, flags);
|
|
if (bp == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
ASSERT(!bp->b_error);
|
|
|
|
_xfs_trans_bjoin(tp, bp, 1);
|
|
trace_xfs_trans_get_buf(bp->b_fspriv);
|
|
return (bp);
|
|
}
|
|
|
|
/*
|
|
* Get and lock the superblock buffer of this file system for the
|
|
* given transaction.
|
|
*
|
|
* We don't need to use incore_match() here, because the superblock
|
|
* buffer is a private buffer which we keep a pointer to in the
|
|
* mount structure.
|
|
*/
|
|
xfs_buf_t *
|
|
xfs_trans_getsb(xfs_trans_t *tp,
|
|
struct xfs_mount *mp,
|
|
int flags)
|
|
{
|
|
xfs_buf_t *bp;
|
|
xfs_buf_log_item_t *bip;
|
|
|
|
/*
|
|
* Default to just trying to lock the superblock buffer
|
|
* if tp is NULL.
|
|
*/
|
|
if (tp == NULL) {
|
|
return (xfs_getsb(mp, flags));
|
|
}
|
|
|
|
/*
|
|
* If the superblock buffer already has this transaction
|
|
* pointer in its b_fsprivate2 field, then we know we already
|
|
* have it locked. In this case we just increment the lock
|
|
* recursion count and return the buffer to the caller.
|
|
*/
|
|
bp = mp->m_sb_bp;
|
|
if (bp->b_transp == tp) {
|
|
bip = bp->b_fspriv;
|
|
ASSERT(bip != NULL);
|
|
ASSERT(atomic_read(&bip->bli_refcount) > 0);
|
|
bip->bli_recur++;
|
|
trace_xfs_trans_getsb_recur(bip);
|
|
return (bp);
|
|
}
|
|
|
|
bp = xfs_getsb(mp, flags);
|
|
if (bp == NULL)
|
|
return NULL;
|
|
|
|
_xfs_trans_bjoin(tp, bp, 1);
|
|
trace_xfs_trans_getsb(bp->b_fspriv);
|
|
return (bp);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
xfs_buftarg_t *xfs_error_target;
|
|
int xfs_do_error;
|
|
int xfs_req_num;
|
|
int xfs_error_mod = 33;
|
|
#endif
|
|
|
|
/*
|
|
* Get and lock the buffer for the caller if it is not already
|
|
* locked within the given transaction. If it has not yet been
|
|
* read in, read it from disk. If it is already locked
|
|
* within the transaction and already read in, just increment its
|
|
* lock recursion count and return a pointer to it.
|
|
*
|
|
* If the transaction pointer is NULL, make this just a normal
|
|
* read_buf() call.
|
|
*/
|
|
int
|
|
xfs_trans_read_buf_map(
|
|
struct xfs_mount *mp,
|
|
struct xfs_trans *tp,
|
|
struct xfs_buftarg *target,
|
|
struct xfs_buf_map *map,
|
|
int nmaps,
|
|
xfs_buf_flags_t flags,
|
|
struct xfs_buf **bpp,
|
|
const struct xfs_buf_ops *ops)
|
|
{
|
|
xfs_buf_t *bp;
|
|
xfs_buf_log_item_t *bip;
|
|
int error;
|
|
|
|
*bpp = NULL;
|
|
if (!tp) {
|
|
bp = xfs_buf_read_map(target, map, nmaps, flags, ops);
|
|
if (!bp)
|
|
return (flags & XBF_TRYLOCK) ?
|
|
EAGAIN : XFS_ERROR(ENOMEM);
|
|
|
|
if (bp->b_error) {
|
|
error = bp->b_error;
|
|
xfs_buf_ioerror_alert(bp, __func__);
|
|
XFS_BUF_UNDONE(bp);
|
|
xfs_buf_stale(bp);
|
|
xfs_buf_relse(bp);
|
|
|
|
/* bad CRC means corrupted metadata */
|
|
if (error == EFSBADCRC)
|
|
error = EFSCORRUPTED;
|
|
return error;
|
|
}
|
|
#ifdef DEBUG
|
|
if (xfs_do_error) {
|
|
if (xfs_error_target == target) {
|
|
if (((xfs_req_num++) % xfs_error_mod) == 0) {
|
|
xfs_buf_relse(bp);
|
|
xfs_debug(mp, "Returning error!");
|
|
return XFS_ERROR(EIO);
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
if (XFS_FORCED_SHUTDOWN(mp))
|
|
goto shutdown_abort;
|
|
*bpp = bp;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* If we find the buffer in the cache with this transaction
|
|
* pointer in its b_fsprivate2 field, then we know we already
|
|
* have it locked. If it is already read in we just increment
|
|
* the lock recursion count and return the buffer to the caller.
|
|
* If the buffer is not yet read in, then we read it in, increment
|
|
* the lock recursion count, and return it to the caller.
|
|
*/
|
|
bp = xfs_trans_buf_item_match(tp, target, map, nmaps);
|
|
if (bp != NULL) {
|
|
ASSERT(xfs_buf_islocked(bp));
|
|
ASSERT(bp->b_transp == tp);
|
|
ASSERT(bp->b_fspriv != NULL);
|
|
ASSERT(!bp->b_error);
|
|
if (!(XFS_BUF_ISDONE(bp))) {
|
|
trace_xfs_trans_read_buf_io(bp, _RET_IP_);
|
|
ASSERT(!XFS_BUF_ISASYNC(bp));
|
|
ASSERT(bp->b_iodone == NULL);
|
|
XFS_BUF_READ(bp);
|
|
bp->b_ops = ops;
|
|
|
|
/*
|
|
* XXX(hch): clean up the error handling here to be less
|
|
* of a mess..
|
|
*/
|
|
if (XFS_FORCED_SHUTDOWN(mp)) {
|
|
trace_xfs_bdstrat_shut(bp, _RET_IP_);
|
|
xfs_bioerror_relse(bp);
|
|
} else {
|
|
xfs_buf_iorequest(bp);
|
|
}
|
|
|
|
error = xfs_buf_iowait(bp);
|
|
if (error) {
|
|
xfs_buf_ioerror_alert(bp, __func__);
|
|
xfs_buf_relse(bp);
|
|
/*
|
|
* We can gracefully recover from most read
|
|
* errors. Ones we can't are those that happen
|
|
* after the transaction's already dirty.
|
|
*/
|
|
if (tp->t_flags & XFS_TRANS_DIRTY)
|
|
xfs_force_shutdown(tp->t_mountp,
|
|
SHUTDOWN_META_IO_ERROR);
|
|
/* bad CRC means corrupted metadata */
|
|
if (error == EFSBADCRC)
|
|
error = EFSCORRUPTED;
|
|
return error;
|
|
}
|
|
}
|
|
/*
|
|
* We never locked this buf ourselves, so we shouldn't
|
|
* brelse it either. Just get out.
|
|
*/
|
|
if (XFS_FORCED_SHUTDOWN(mp)) {
|
|
trace_xfs_trans_read_buf_shut(bp, _RET_IP_);
|
|
*bpp = NULL;
|
|
return XFS_ERROR(EIO);
|
|
}
|
|
|
|
|
|
bip = bp->b_fspriv;
|
|
bip->bli_recur++;
|
|
|
|
ASSERT(atomic_read(&bip->bli_refcount) > 0);
|
|
trace_xfs_trans_read_buf_recur(bip);
|
|
*bpp = bp;
|
|
return 0;
|
|
}
|
|
|
|
bp = xfs_buf_read_map(target, map, nmaps, flags, ops);
|
|
if (bp == NULL) {
|
|
*bpp = NULL;
|
|
return (flags & XBF_TRYLOCK) ?
|
|
0 : XFS_ERROR(ENOMEM);
|
|
}
|
|
if (bp->b_error) {
|
|
error = bp->b_error;
|
|
xfs_buf_stale(bp);
|
|
XFS_BUF_DONE(bp);
|
|
xfs_buf_ioerror_alert(bp, __func__);
|
|
if (tp->t_flags & XFS_TRANS_DIRTY)
|
|
xfs_force_shutdown(tp->t_mountp, SHUTDOWN_META_IO_ERROR);
|
|
xfs_buf_relse(bp);
|
|
|
|
/* bad CRC means corrupted metadata */
|
|
if (error == EFSBADCRC)
|
|
error = EFSCORRUPTED;
|
|
return error;
|
|
}
|
|
#ifdef DEBUG
|
|
if (xfs_do_error && !(tp->t_flags & XFS_TRANS_DIRTY)) {
|
|
if (xfs_error_target == target) {
|
|
if (((xfs_req_num++) % xfs_error_mod) == 0) {
|
|
xfs_force_shutdown(tp->t_mountp,
|
|
SHUTDOWN_META_IO_ERROR);
|
|
xfs_buf_relse(bp);
|
|
xfs_debug(mp, "Returning trans error!");
|
|
return XFS_ERROR(EIO);
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
if (XFS_FORCED_SHUTDOWN(mp))
|
|
goto shutdown_abort;
|
|
|
|
_xfs_trans_bjoin(tp, bp, 1);
|
|
trace_xfs_trans_read_buf(bp->b_fspriv);
|
|
|
|
*bpp = bp;
|
|
return 0;
|
|
|
|
shutdown_abort:
|
|
trace_xfs_trans_read_buf_shut(bp, _RET_IP_);
|
|
xfs_buf_relse(bp);
|
|
*bpp = NULL;
|
|
return XFS_ERROR(EIO);
|
|
}
|
|
|
|
/*
|
|
* Release the buffer bp which was previously acquired with one of the
|
|
* xfs_trans_... buffer allocation routines if the buffer has not
|
|
* been modified within this transaction. If the buffer is modified
|
|
* within this transaction, do decrement the recursion count but do
|
|
* not release the buffer even if the count goes to 0. If the buffer is not
|
|
* modified within the transaction, decrement the recursion count and
|
|
* release the buffer if the recursion count goes to 0.
|
|
*
|
|
* If the buffer is to be released and it was not modified before
|
|
* this transaction began, then free the buf_log_item associated with it.
|
|
*
|
|
* If the transaction pointer is NULL, make this just a normal
|
|
* brelse() call.
|
|
*/
|
|
void
|
|
xfs_trans_brelse(xfs_trans_t *tp,
|
|
xfs_buf_t *bp)
|
|
{
|
|
xfs_buf_log_item_t *bip;
|
|
|
|
/*
|
|
* Default to a normal brelse() call if the tp is NULL.
|
|
*/
|
|
if (tp == NULL) {
|
|
ASSERT(bp->b_transp == NULL);
|
|
xfs_buf_relse(bp);
|
|
return;
|
|
}
|
|
|
|
ASSERT(bp->b_transp == tp);
|
|
bip = bp->b_fspriv;
|
|
ASSERT(bip->bli_item.li_type == XFS_LI_BUF);
|
|
ASSERT(!(bip->bli_flags & XFS_BLI_STALE));
|
|
ASSERT(!(bip->__bli_format.blf_flags & XFS_BLF_CANCEL));
|
|
ASSERT(atomic_read(&bip->bli_refcount) > 0);
|
|
|
|
trace_xfs_trans_brelse(bip);
|
|
|
|
/*
|
|
* If the release is just for a recursive lock,
|
|
* then decrement the count and return.
|
|
*/
|
|
if (bip->bli_recur > 0) {
|
|
bip->bli_recur--;
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* If the buffer is dirty within this transaction, we can't
|
|
* release it until we commit.
|
|
*/
|
|
if (bip->bli_item.li_desc->lid_flags & XFS_LID_DIRTY)
|
|
return;
|
|
|
|
/*
|
|
* If the buffer has been invalidated, then we can't release
|
|
* it until the transaction commits to disk unless it is re-dirtied
|
|
* as part of this transaction. This prevents us from pulling
|
|
* the item from the AIL before we should.
|
|
*/
|
|
if (bip->bli_flags & XFS_BLI_STALE)
|
|
return;
|
|
|
|
ASSERT(!(bip->bli_flags & XFS_BLI_LOGGED));
|
|
|
|
/*
|
|
* Free up the log item descriptor tracking the released item.
|
|
*/
|
|
xfs_trans_del_item(&bip->bli_item);
|
|
|
|
/*
|
|
* Clear the hold flag in the buf log item if it is set.
|
|
* We wouldn't want the next user of the buffer to
|
|
* get confused.
|
|
*/
|
|
if (bip->bli_flags & XFS_BLI_HOLD) {
|
|
bip->bli_flags &= ~XFS_BLI_HOLD;
|
|
}
|
|
|
|
/*
|
|
* Drop our reference to the buf log item.
|
|
*/
|
|
atomic_dec(&bip->bli_refcount);
|
|
|
|
/*
|
|
* If the buf item is not tracking data in the log, then
|
|
* we must free it before releasing the buffer back to the
|
|
* free pool. Before releasing the buffer to the free pool,
|
|
* clear the transaction pointer in b_fsprivate2 to dissolve
|
|
* its relation to this transaction.
|
|
*/
|
|
if (!xfs_buf_item_dirty(bip)) {
|
|
/***
|
|
ASSERT(bp->b_pincount == 0);
|
|
***/
|
|
ASSERT(atomic_read(&bip->bli_refcount) == 0);
|
|
ASSERT(!(bip->bli_item.li_flags & XFS_LI_IN_AIL));
|
|
ASSERT(!(bip->bli_flags & XFS_BLI_INODE_ALLOC_BUF));
|
|
xfs_buf_item_relse(bp);
|
|
}
|
|
|
|
bp->b_transp = NULL;
|
|
xfs_buf_relse(bp);
|
|
}
|
|
|
|
/*
|
|
* Mark the buffer as not needing to be unlocked when the buf item's
|
|
* iop_unlock() routine is called. The buffer must already be locked
|
|
* and associated with the given transaction.
|
|
*/
|
|
/* ARGSUSED */
|
|
void
|
|
xfs_trans_bhold(xfs_trans_t *tp,
|
|
xfs_buf_t *bp)
|
|
{
|
|
xfs_buf_log_item_t *bip = bp->b_fspriv;
|
|
|
|
ASSERT(bp->b_transp == tp);
|
|
ASSERT(bip != NULL);
|
|
ASSERT(!(bip->bli_flags & XFS_BLI_STALE));
|
|
ASSERT(!(bip->__bli_format.blf_flags & XFS_BLF_CANCEL));
|
|
ASSERT(atomic_read(&bip->bli_refcount) > 0);
|
|
|
|
bip->bli_flags |= XFS_BLI_HOLD;
|
|
trace_xfs_trans_bhold(bip);
|
|
}
|
|
|
|
/*
|
|
* Cancel the previous buffer hold request made on this buffer
|
|
* for this transaction.
|
|
*/
|
|
void
|
|
xfs_trans_bhold_release(xfs_trans_t *tp,
|
|
xfs_buf_t *bp)
|
|
{
|
|
xfs_buf_log_item_t *bip = bp->b_fspriv;
|
|
|
|
ASSERT(bp->b_transp == tp);
|
|
ASSERT(bip != NULL);
|
|
ASSERT(!(bip->bli_flags & XFS_BLI_STALE));
|
|
ASSERT(!(bip->__bli_format.blf_flags & XFS_BLF_CANCEL));
|
|
ASSERT(atomic_read(&bip->bli_refcount) > 0);
|
|
ASSERT(bip->bli_flags & XFS_BLI_HOLD);
|
|
|
|
bip->bli_flags &= ~XFS_BLI_HOLD;
|
|
trace_xfs_trans_bhold_release(bip);
|
|
}
|
|
|
|
/*
|
|
* This is called to mark bytes first through last inclusive of the given
|
|
* buffer as needing to be logged when the transaction is committed.
|
|
* The buffer must already be associated with the given transaction.
|
|
*
|
|
* First and last are numbers relative to the beginning of this buffer,
|
|
* so the first byte in the buffer is numbered 0 regardless of the
|
|
* value of b_blkno.
|
|
*/
|
|
void
|
|
xfs_trans_log_buf(xfs_trans_t *tp,
|
|
xfs_buf_t *bp,
|
|
uint first,
|
|
uint last)
|
|
{
|
|
xfs_buf_log_item_t *bip = bp->b_fspriv;
|
|
|
|
ASSERT(bp->b_transp == tp);
|
|
ASSERT(bip != NULL);
|
|
ASSERT(first <= last && last < BBTOB(bp->b_length));
|
|
ASSERT(bp->b_iodone == NULL ||
|
|
bp->b_iodone == xfs_buf_iodone_callbacks);
|
|
|
|
/*
|
|
* Mark the buffer as needing to be written out eventually,
|
|
* and set its iodone function to remove the buffer's buf log
|
|
* item from the AIL and free it when the buffer is flushed
|
|
* to disk. See xfs_buf_attach_iodone() for more details
|
|
* on li_cb and xfs_buf_iodone_callbacks().
|
|
* If we end up aborting this transaction, we trap this buffer
|
|
* inside the b_bdstrat callback so that this won't get written to
|
|
* disk.
|
|
*/
|
|
XFS_BUF_DONE(bp);
|
|
|
|
ASSERT(atomic_read(&bip->bli_refcount) > 0);
|
|
bp->b_iodone = xfs_buf_iodone_callbacks;
|
|
bip->bli_item.li_cb = xfs_buf_iodone;
|
|
|
|
trace_xfs_trans_log_buf(bip);
|
|
|
|
/*
|
|
* If we invalidated the buffer within this transaction, then
|
|
* cancel the invalidation now that we're dirtying the buffer
|
|
* again. There are no races with the code in xfs_buf_item_unpin(),
|
|
* because we have a reference to the buffer this entire time.
|
|
*/
|
|
if (bip->bli_flags & XFS_BLI_STALE) {
|
|
bip->bli_flags &= ~XFS_BLI_STALE;
|
|
ASSERT(XFS_BUF_ISSTALE(bp));
|
|
XFS_BUF_UNSTALE(bp);
|
|
bip->__bli_format.blf_flags &= ~XFS_BLF_CANCEL;
|
|
}
|
|
|
|
tp->t_flags |= XFS_TRANS_DIRTY;
|
|
bip->bli_item.li_desc->lid_flags |= XFS_LID_DIRTY;
|
|
|
|
/*
|
|
* If we have an ordered buffer we are not logging any dirty range but
|
|
* it still needs to be marked dirty and that it has been logged.
|
|
*/
|
|
bip->bli_flags |= XFS_BLI_DIRTY | XFS_BLI_LOGGED;
|
|
if (!(bip->bli_flags & XFS_BLI_ORDERED))
|
|
xfs_buf_item_log(bip, first, last);
|
|
}
|
|
|
|
|
|
/*
|
|
* Invalidate a buffer that is being used within a transaction.
|
|
*
|
|
* Typically this is because the blocks in the buffer are being freed, so we
|
|
* need to prevent it from being written out when we're done. Allowing it
|
|
* to be written again might overwrite data in the free blocks if they are
|
|
* reallocated to a file.
|
|
*
|
|
* We prevent the buffer from being written out by marking it stale. We can't
|
|
* get rid of the buf log item at this point because the buffer may still be
|
|
* pinned by another transaction. If that is the case, then we'll wait until
|
|
* the buffer is committed to disk for the last time (we can tell by the ref
|
|
* count) and free it in xfs_buf_item_unpin(). Until that happens we will
|
|
* keep the buffer locked so that the buffer and buf log item are not reused.
|
|
*
|
|
* We also set the XFS_BLF_CANCEL flag in the buf log format structure and log
|
|
* the buf item. This will be used at recovery time to determine that copies
|
|
* of the buffer in the log before this should not be replayed.
|
|
*
|
|
* We mark the item descriptor and the transaction dirty so that we'll hold
|
|
* the buffer until after the commit.
|
|
*
|
|
* Since we're invalidating the buffer, we also clear the state about which
|
|
* parts of the buffer have been logged. We also clear the flag indicating
|
|
* that this is an inode buffer since the data in the buffer will no longer
|
|
* be valid.
|
|
*
|
|
* We set the stale bit in the buffer as well since we're getting rid of it.
|
|
*/
|
|
void
|
|
xfs_trans_binval(
|
|
xfs_trans_t *tp,
|
|
xfs_buf_t *bp)
|
|
{
|
|
xfs_buf_log_item_t *bip = bp->b_fspriv;
|
|
int i;
|
|
|
|
ASSERT(bp->b_transp == tp);
|
|
ASSERT(bip != NULL);
|
|
ASSERT(atomic_read(&bip->bli_refcount) > 0);
|
|
|
|
trace_xfs_trans_binval(bip);
|
|
|
|
if (bip->bli_flags & XFS_BLI_STALE) {
|
|
/*
|
|
* If the buffer is already invalidated, then
|
|
* just return.
|
|
*/
|
|
ASSERT(XFS_BUF_ISSTALE(bp));
|
|
ASSERT(!(bip->bli_flags & (XFS_BLI_LOGGED | XFS_BLI_DIRTY)));
|
|
ASSERT(!(bip->__bli_format.blf_flags & XFS_BLF_INODE_BUF));
|
|
ASSERT(!(bip->__bli_format.blf_flags & XFS_BLFT_MASK));
|
|
ASSERT(bip->__bli_format.blf_flags & XFS_BLF_CANCEL);
|
|
ASSERT(bip->bli_item.li_desc->lid_flags & XFS_LID_DIRTY);
|
|
ASSERT(tp->t_flags & XFS_TRANS_DIRTY);
|
|
return;
|
|
}
|
|
|
|
xfs_buf_stale(bp);
|
|
|
|
bip->bli_flags |= XFS_BLI_STALE;
|
|
bip->bli_flags &= ~(XFS_BLI_INODE_BUF | XFS_BLI_LOGGED | XFS_BLI_DIRTY);
|
|
bip->__bli_format.blf_flags &= ~XFS_BLF_INODE_BUF;
|
|
bip->__bli_format.blf_flags |= XFS_BLF_CANCEL;
|
|
bip->__bli_format.blf_flags &= ~XFS_BLFT_MASK;
|
|
for (i = 0; i < bip->bli_format_count; i++) {
|
|
memset(bip->bli_formats[i].blf_data_map, 0,
|
|
(bip->bli_formats[i].blf_map_size * sizeof(uint)));
|
|
}
|
|
bip->bli_item.li_desc->lid_flags |= XFS_LID_DIRTY;
|
|
tp->t_flags |= XFS_TRANS_DIRTY;
|
|
}
|
|
|
|
/*
|
|
* This call is used to indicate that the buffer contains on-disk inodes which
|
|
* must be handled specially during recovery. They require special handling
|
|
* because only the di_next_unlinked from the inodes in the buffer should be
|
|
* recovered. The rest of the data in the buffer is logged via the inodes
|
|
* themselves.
|
|
*
|
|
* All we do is set the XFS_BLI_INODE_BUF flag in the items flags so it can be
|
|
* transferred to the buffer's log format structure so that we'll know what to
|
|
* do at recovery time.
|
|
*/
|
|
void
|
|
xfs_trans_inode_buf(
|
|
xfs_trans_t *tp,
|
|
xfs_buf_t *bp)
|
|
{
|
|
xfs_buf_log_item_t *bip = bp->b_fspriv;
|
|
|
|
ASSERT(bp->b_transp == tp);
|
|
ASSERT(bip != NULL);
|
|
ASSERT(atomic_read(&bip->bli_refcount) > 0);
|
|
|
|
bip->bli_flags |= XFS_BLI_INODE_BUF;
|
|
xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DINO_BUF);
|
|
}
|
|
|
|
/*
|
|
* This call is used to indicate that the buffer is going to
|
|
* be staled and was an inode buffer. This means it gets
|
|
* special processing during unpin - where any inodes
|
|
* associated with the buffer should be removed from ail.
|
|
* There is also special processing during recovery,
|
|
* any replay of the inodes in the buffer needs to be
|
|
* prevented as the buffer may have been reused.
|
|
*/
|
|
void
|
|
xfs_trans_stale_inode_buf(
|
|
xfs_trans_t *tp,
|
|
xfs_buf_t *bp)
|
|
{
|
|
xfs_buf_log_item_t *bip = bp->b_fspriv;
|
|
|
|
ASSERT(bp->b_transp == tp);
|
|
ASSERT(bip != NULL);
|
|
ASSERT(atomic_read(&bip->bli_refcount) > 0);
|
|
|
|
bip->bli_flags |= XFS_BLI_STALE_INODE;
|
|
bip->bli_item.li_cb = xfs_buf_iodone;
|
|
xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DINO_BUF);
|
|
}
|
|
|
|
/*
|
|
* Mark the buffer as being one which contains newly allocated
|
|
* inodes. We need to make sure that even if this buffer is
|
|
* relogged as an 'inode buf' we still recover all of the inode
|
|
* images in the face of a crash. This works in coordination with
|
|
* xfs_buf_item_committed() to ensure that the buffer remains in the
|
|
* AIL at its original location even after it has been relogged.
|
|
*/
|
|
/* ARGSUSED */
|
|
void
|
|
xfs_trans_inode_alloc_buf(
|
|
xfs_trans_t *tp,
|
|
xfs_buf_t *bp)
|
|
{
|
|
xfs_buf_log_item_t *bip = bp->b_fspriv;
|
|
|
|
ASSERT(bp->b_transp == tp);
|
|
ASSERT(bip != NULL);
|
|
ASSERT(atomic_read(&bip->bli_refcount) > 0);
|
|
|
|
bip->bli_flags |= XFS_BLI_INODE_ALLOC_BUF;
|
|
xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DINO_BUF);
|
|
}
|
|
|
|
/*
|
|
* Mark the buffer as ordered for this transaction. This means
|
|
* that the contents of the buffer are not recorded in the transaction
|
|
* but it is tracked in the AIL as though it was. This allows us
|
|
* to record logical changes in transactions rather than the physical
|
|
* changes we make to the buffer without changing writeback ordering
|
|
* constraints of metadata buffers.
|
|
*/
|
|
void
|
|
xfs_trans_ordered_buf(
|
|
struct xfs_trans *tp,
|
|
struct xfs_buf *bp)
|
|
{
|
|
struct xfs_buf_log_item *bip = bp->b_fspriv;
|
|
|
|
ASSERT(bp->b_transp == tp);
|
|
ASSERT(bip != NULL);
|
|
ASSERT(atomic_read(&bip->bli_refcount) > 0);
|
|
|
|
bip->bli_flags |= XFS_BLI_ORDERED;
|
|
trace_xfs_buf_item_ordered(bip);
|
|
}
|
|
|
|
/*
|
|
* Set the type of the buffer for log recovery so that it can correctly identify
|
|
* and hence attach the correct buffer ops to the buffer after replay.
|
|
*/
|
|
void
|
|
xfs_trans_buf_set_type(
|
|
struct xfs_trans *tp,
|
|
struct xfs_buf *bp,
|
|
enum xfs_blft type)
|
|
{
|
|
struct xfs_buf_log_item *bip = bp->b_fspriv;
|
|
|
|
if (!tp)
|
|
return;
|
|
|
|
ASSERT(bp->b_transp == tp);
|
|
ASSERT(bip != NULL);
|
|
ASSERT(atomic_read(&bip->bli_refcount) > 0);
|
|
|
|
xfs_blft_to_flags(&bip->__bli_format, type);
|
|
}
|
|
|
|
void
|
|
xfs_trans_buf_copy_type(
|
|
struct xfs_buf *dst_bp,
|
|
struct xfs_buf *src_bp)
|
|
{
|
|
struct xfs_buf_log_item *sbip = src_bp->b_fspriv;
|
|
struct xfs_buf_log_item *dbip = dst_bp->b_fspriv;
|
|
enum xfs_blft type;
|
|
|
|
type = xfs_blft_from_flags(&sbip->__bli_format);
|
|
xfs_blft_to_flags(&dbip->__bli_format, type);
|
|
}
|
|
|
|
/*
|
|
* Similar to xfs_trans_inode_buf(), this marks the buffer as a cluster of
|
|
* dquots. However, unlike in inode buffer recovery, dquot buffers get
|
|
* recovered in their entirety. (Hence, no XFS_BLI_DQUOT_ALLOC_BUF flag).
|
|
* The only thing that makes dquot buffers different from regular
|
|
* buffers is that we must not replay dquot bufs when recovering
|
|
* if a _corresponding_ quotaoff has happened. We also have to distinguish
|
|
* between usr dquot bufs and grp dquot bufs, because usr and grp quotas
|
|
* can be turned off independently.
|
|
*/
|
|
/* ARGSUSED */
|
|
void
|
|
xfs_trans_dquot_buf(
|
|
xfs_trans_t *tp,
|
|
xfs_buf_t *bp,
|
|
uint type)
|
|
{
|
|
struct xfs_buf_log_item *bip = bp->b_fspriv;
|
|
|
|
ASSERT(type == XFS_BLF_UDQUOT_BUF ||
|
|
type == XFS_BLF_PDQUOT_BUF ||
|
|
type == XFS_BLF_GDQUOT_BUF);
|
|
|
|
bip->__bli_format.blf_flags |= type;
|
|
|
|
switch (type) {
|
|
case XFS_BLF_UDQUOT_BUF:
|
|
type = XFS_BLFT_UDQUOT_BUF;
|
|
break;
|
|
case XFS_BLF_PDQUOT_BUF:
|
|
type = XFS_BLFT_PDQUOT_BUF;
|
|
break;
|
|
case XFS_BLF_GDQUOT_BUF:
|
|
type = XFS_BLFT_GDQUOT_BUF;
|
|
break;
|
|
default:
|
|
type = XFS_BLFT_UNKNOWN_BUF;
|
|
break;
|
|
}
|
|
|
|
xfs_trans_buf_set_type(tp, bp, type);
|
|
}
|