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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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