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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2008-2010, 2013 Dave Chinner
* All Rights Reserved.
*/
#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_mount.h"
#include "xfs_inode.h"
#include "xfs_trans.h"
#include "xfs_trans_priv.h"
#include "xfs_icreate_item.h"
#include "xfs_log.h"
#include "xfs_log_priv.h"
#include "xfs_log_recover.h"
#include "xfs_ialloc.h"
#include "xfs_trace.h"
struct kmem_cache *xfs_icreate_cache; /* inode create item */
static inline struct xfs_icreate_item *ICR_ITEM(struct xfs_log_item *lip)
{
return container_of(lip, struct xfs_icreate_item, ic_item);
}
/*
* This returns the number of iovecs needed to log the given inode item.
*
* We only need one iovec for the icreate log structure.
*/
STATIC void
xfs_icreate_item_size(
struct xfs_log_item *lip,
int *nvecs,
int *nbytes)
{
*nvecs += 1;
*nbytes += sizeof(struct xfs_icreate_log);
}
/*
* This is called to fill in the vector of log iovecs for the
* given inode create log item.
*/
STATIC void
xfs_icreate_item_format(
struct xfs_log_item *lip,
struct xfs_log_vec *lv)
{
struct xfs_icreate_item *icp = ICR_ITEM(lip);
struct xfs_log_iovec *vecp = NULL;
xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ICREATE,
&icp->ic_format,
sizeof(struct xfs_icreate_log));
}
STATIC void
xfs_icreate_item_release(
struct xfs_log_item *lip)
{
kmem_free(ICR_ITEM(lip)->ic_item.li_lv_shadow);
kmem_cache_free(xfs_icreate_cache, ICR_ITEM(lip));
}
static const struct xfs_item_ops xfs_icreate_item_ops = {
.flags = XFS_ITEM_RELEASE_WHEN_COMMITTED,
.iop_size = xfs_icreate_item_size,
.iop_format = xfs_icreate_item_format,
.iop_release = xfs_icreate_item_release,
};
/*
* Initialize the inode log item for a newly allocated (in-core) inode.
*
* Inode extents can only reside within an AG. Hence specify the starting
* block for the inode chunk by offset within an AG as well as the
* length of the allocated extent.
*
* This joins the item to the transaction and marks it dirty so
* that we don't need a separate call to do this, nor does the
* caller need to know anything about the icreate item.
*/
void
xfs_icreate_log(
struct xfs_trans *tp,
xfs_agnumber_t agno,
xfs_agblock_t agbno,
unsigned int count,
unsigned int inode_size,
xfs_agblock_t length,
unsigned int generation)
{
struct xfs_icreate_item *icp;
icp = kmem_cache_zalloc(xfs_icreate_cache, GFP_KERNEL | __GFP_NOFAIL);
xfs_log_item_init(tp->t_mountp, &icp->ic_item, XFS_LI_ICREATE,
&xfs_icreate_item_ops);
icp->ic_format.icl_type = XFS_LI_ICREATE;
icp->ic_format.icl_size = 1; /* single vector */
icp->ic_format.icl_ag = cpu_to_be32(agno);
icp->ic_format.icl_agbno = cpu_to_be32(agbno);
icp->ic_format.icl_count = cpu_to_be32(count);
icp->ic_format.icl_isize = cpu_to_be32(inode_size);
icp->ic_format.icl_length = cpu_to_be32(length);
icp->ic_format.icl_gen = cpu_to_be32(generation);
xfs_trans_add_item(tp, &icp->ic_item);
tp->t_flags |= XFS_TRANS_DIRTY;
set_bit(XFS_LI_DIRTY, &icp->ic_item.li_flags);
}
static enum xlog_recover_reorder
xlog_recover_icreate_reorder(
struct xlog_recover_item *item)
{
/*
* Inode allocation buffers must be replayed before subsequent inode
* items try to modify those buffers. ICREATE items are the logical
* equivalent of logging a newly initialized inode buffer, so recover
* these at the same time that we recover logged buffers.
*/
return XLOG_REORDER_BUFFER_LIST;
}
/*
* This routine is called when an inode create format structure is found in a
* committed transaction in the log. It's purpose is to initialise the inodes
* being allocated on disk. This requires us to get inode cluster buffers that
* match the range to be initialised, stamped with inode templates and written
* by delayed write so that subsequent modifications will hit the cached buffer
* and only need writing out at the end of recovery.
*/
STATIC int
xlog_recover_icreate_commit_pass2(
struct xlog *log,
struct list_head *buffer_list,
struct xlog_recover_item *item,
xfs_lsn_t lsn)
{
struct xfs_mount *mp = log->l_mp;
struct xfs_icreate_log *icl;
struct xfs_ino_geometry *igeo = M_IGEO(mp);
xfs_agnumber_t agno;
xfs_agblock_t agbno;
unsigned int count;
unsigned int isize;
xfs_agblock_t length;
int bb_per_cluster;
int cancel_count;
int nbufs;
int i;
icl = (struct xfs_icreate_log *)item->ri_buf[0].i_addr;
if (icl->icl_type != XFS_LI_ICREATE) {
xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad type");
return -EINVAL;
}
if (icl->icl_size != 1) {
xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad icl size");
return -EINVAL;
}
agno = be32_to_cpu(icl->icl_ag);
if (agno >= mp->m_sb.sb_agcount) {
xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad agno");
return -EINVAL;
}
agbno = be32_to_cpu(icl->icl_agbno);
if (!agbno || agbno == NULLAGBLOCK || agbno >= mp->m_sb.sb_agblocks) {
xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad agbno");
return -EINVAL;
}
isize = be32_to_cpu(icl->icl_isize);
if (isize != mp->m_sb.sb_inodesize) {
xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad isize");
return -EINVAL;
}
count = be32_to_cpu(icl->icl_count);
if (!count) {
xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad count");
return -EINVAL;
}
length = be32_to_cpu(icl->icl_length);
if (!length || length >= mp->m_sb.sb_agblocks) {
xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad length");
return -EINVAL;
}
/*
* The inode chunk is either full or sparse and we only support
* m_ino_geo.ialloc_min_blks sized sparse allocations at this time.
*/
if (length != igeo->ialloc_blks &&
length != igeo->ialloc_min_blks) {
xfs_warn(log->l_mp,
"%s: unsupported chunk length", __func__);
return -EINVAL;
}
/* verify inode count is consistent with extent length */
if ((count >> mp->m_sb.sb_inopblog) != length) {
xfs_warn(log->l_mp,
"%s: inconsistent inode count and chunk length",
__func__);
return -EINVAL;
}
/*
* The icreate transaction can cover multiple cluster buffers and these
* buffers could have been freed and reused. Check the individual
* buffers for cancellation so we don't overwrite anything written after
* a cancellation.
*/
bb_per_cluster = XFS_FSB_TO_BB(mp, igeo->blocks_per_cluster);
nbufs = length / igeo->blocks_per_cluster;
for (i = 0, cancel_count = 0; i < nbufs; i++) {
xfs_daddr_t daddr;
daddr = XFS_AGB_TO_DADDR(mp, agno,
agbno + i * igeo->blocks_per_cluster);
if (xlog_is_buffer_cancelled(log, daddr, bb_per_cluster))
cancel_count++;
}
/*
* We currently only use icreate for a single allocation at a time. This
* means we should expect either all or none of the buffers to be
* cancelled. Be conservative and skip replay if at least one buffer is
* cancelled, but warn the user that something is awry if the buffers
* are not consistent.
*
* XXX: This must be refined to only skip cancelled clusters once we use
* icreate for multiple chunk allocations.
*/
ASSERT(!cancel_count || cancel_count == nbufs);
if (cancel_count) {
if (cancel_count != nbufs)
xfs_warn(mp,
"WARNING: partial inode chunk cancellation, skipped icreate.");
trace_xfs_log_recover_icreate_cancel(log, icl);
return 0;
}
trace_xfs_log_recover_icreate_recover(log, icl);
return xfs_ialloc_inode_init(mp, NULL, buffer_list, count, agno, agbno,
length, be32_to_cpu(icl->icl_gen));
}
const struct xlog_recover_item_ops xlog_icreate_item_ops = {
.item_type = XFS_LI_ICREATE,
.reorder = xlog_recover_icreate_reorder,
.commit_pass2 = xlog_recover_icreate_commit_pass2,
};
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