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e53bcffad0
Now that we've established (again!) that empty xattr leaf buffers are ok, we no longer need to bhold them to transactions when we're creating new leaf blocks. Get rid of the entire mechanism, which should simplify the xattr code quite a bit. The original justification for using bhold here was to prevent the AIL from trying to write the empty leaf block into the fs during the brief time that we release the buffer lock. The reason for /that/ was to prevent recovery from tripping over the empty ondisk block. Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Darrick J. Wong <djwong@kernel.org>
889 lines
24 KiB
C
889 lines
24 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2022 Oracle. All Rights Reserved.
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* Author: Allison Henderson <allison.henderson@oracle.com>
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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_trans_resv.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_log_format.h"
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#include "xfs_trans.h"
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#include "xfs_bmap_btree.h"
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#include "xfs_trans_priv.h"
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#include "xfs_log.h"
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#include "xfs_inode.h"
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#include "xfs_da_format.h"
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#include "xfs_da_btree.h"
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#include "xfs_attr.h"
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#include "xfs_attr_item.h"
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#include "xfs_trace.h"
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#include "xfs_trans_space.h"
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#include "xfs_errortag.h"
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#include "xfs_error.h"
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#include "xfs_log_priv.h"
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#include "xfs_log_recover.h"
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struct kmem_cache *xfs_attri_cache;
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struct kmem_cache *xfs_attrd_cache;
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static const struct xfs_item_ops xfs_attri_item_ops;
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static const struct xfs_item_ops xfs_attrd_item_ops;
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static struct xfs_attrd_log_item *xfs_trans_get_attrd(struct xfs_trans *tp,
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struct xfs_attri_log_item *attrip);
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static inline struct xfs_attri_log_item *ATTRI_ITEM(struct xfs_log_item *lip)
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{
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return container_of(lip, struct xfs_attri_log_item, attri_item);
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}
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/*
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* Shared xattr name/value buffers for logged extended attribute operations
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*
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* When logging updates to extended attributes, we can create quite a few
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* attribute log intent items for a single xattr update. To avoid cycling the
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* memory allocator and memcpy overhead, the name (and value, for setxattr)
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* are kept in a refcounted object that is shared across all related log items
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* and the upper-level deferred work state structure. The shared buffer has
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* a control structure, followed by the name, and then the value.
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*/
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static inline struct xfs_attri_log_nameval *
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xfs_attri_log_nameval_get(
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struct xfs_attri_log_nameval *nv)
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{
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if (!refcount_inc_not_zero(&nv->refcount))
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return NULL;
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return nv;
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}
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static inline void
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xfs_attri_log_nameval_put(
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struct xfs_attri_log_nameval *nv)
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{
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if (!nv)
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return;
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if (refcount_dec_and_test(&nv->refcount))
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kvfree(nv);
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}
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static inline struct xfs_attri_log_nameval *
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xfs_attri_log_nameval_alloc(
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const void *name,
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unsigned int name_len,
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const void *value,
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unsigned int value_len)
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{
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struct xfs_attri_log_nameval *nv;
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/*
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* This could be over 64kB in length, so we have to use kvmalloc() for
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* this. But kvmalloc() utterly sucks, so we use our own version.
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*/
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nv = xlog_kvmalloc(sizeof(struct xfs_attri_log_nameval) +
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name_len + value_len);
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if (!nv)
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return nv;
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nv->name.i_addr = nv + 1;
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nv->name.i_len = name_len;
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nv->name.i_type = XLOG_REG_TYPE_ATTR_NAME;
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memcpy(nv->name.i_addr, name, name_len);
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if (value_len) {
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nv->value.i_addr = nv->name.i_addr + name_len;
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nv->value.i_len = value_len;
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memcpy(nv->value.i_addr, value, value_len);
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} else {
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nv->value.i_addr = NULL;
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nv->value.i_len = 0;
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}
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nv->value.i_type = XLOG_REG_TYPE_ATTR_VALUE;
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refcount_set(&nv->refcount, 1);
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return nv;
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}
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STATIC void
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xfs_attri_item_free(
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struct xfs_attri_log_item *attrip)
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{
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kmem_free(attrip->attri_item.li_lv_shadow);
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xfs_attri_log_nameval_put(attrip->attri_nameval);
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kmem_cache_free(xfs_attri_cache, attrip);
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}
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/*
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* Freeing the attrip requires that we remove it from the AIL if it has already
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* been placed there. However, the ATTRI may not yet have been placed in the
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* AIL when called by xfs_attri_release() from ATTRD processing due to the
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* ordering of committed vs unpin operations in bulk insert operations. Hence
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* the reference count to ensure only the last caller frees the ATTRI.
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*/
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STATIC void
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xfs_attri_release(
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struct xfs_attri_log_item *attrip)
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{
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ASSERT(atomic_read(&attrip->attri_refcount) > 0);
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if (!atomic_dec_and_test(&attrip->attri_refcount))
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return;
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xfs_trans_ail_delete(&attrip->attri_item, 0);
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xfs_attri_item_free(attrip);
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}
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STATIC void
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xfs_attri_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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struct xfs_attri_log_item *attrip = ATTRI_ITEM(lip);
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struct xfs_attri_log_nameval *nv = attrip->attri_nameval;
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*nvecs += 2;
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*nbytes += sizeof(struct xfs_attri_log_format) +
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xlog_calc_iovec_len(nv->name.i_len);
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if (!nv->value.i_len)
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return;
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*nvecs += 1;
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*nbytes += xlog_calc_iovec_len(nv->value.i_len);
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}
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/*
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* This is called to fill in the log iovecs for the given attri log
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* item. We use 1 iovec for the attri_format_item, 1 for the name, and
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* another for the value if it is present
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*/
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STATIC void
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xfs_attri_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_attri_log_item *attrip = ATTRI_ITEM(lip);
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struct xfs_log_iovec *vecp = NULL;
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struct xfs_attri_log_nameval *nv = attrip->attri_nameval;
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attrip->attri_format.alfi_type = XFS_LI_ATTRI;
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attrip->attri_format.alfi_size = 1;
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/*
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* This size accounting must be done before copying the attrip into the
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* iovec. If we do it after, the wrong size will be recorded to the log
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* and we trip across assertion checks for bad region sizes later during
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* the log recovery.
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*/
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ASSERT(nv->name.i_len > 0);
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attrip->attri_format.alfi_size++;
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if (nv->value.i_len > 0)
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attrip->attri_format.alfi_size++;
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xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTRI_FORMAT,
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&attrip->attri_format,
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sizeof(struct xfs_attri_log_format));
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xlog_copy_from_iovec(lv, &vecp, &nv->name);
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if (nv->value.i_len > 0)
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xlog_copy_from_iovec(lv, &vecp, &nv->value);
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}
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/*
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* The unpin operation is the last place an ATTRI is manipulated in the log. It
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* is either inserted in the AIL or aborted in the event of a log I/O error. In
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* either case, the ATTRI transaction has been successfully committed to make
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* it this far. Therefore, we expect whoever committed the ATTRI to either
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* construct and commit the ATTRD or drop the ATTRD's reference in the event of
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* error. Simply drop the log's ATTRI reference now that the log is done with
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* it.
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*/
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STATIC void
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xfs_attri_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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xfs_attri_release(ATTRI_ITEM(lip));
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}
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STATIC void
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xfs_attri_item_release(
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struct xfs_log_item *lip)
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{
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xfs_attri_release(ATTRI_ITEM(lip));
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}
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/*
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* Allocate and initialize an attri item. Caller may allocate an additional
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* trailing buffer for name and value
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*/
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STATIC struct xfs_attri_log_item *
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xfs_attri_init(
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struct xfs_mount *mp,
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struct xfs_attri_log_nameval *nv)
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{
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struct xfs_attri_log_item *attrip;
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attrip = kmem_cache_zalloc(xfs_attri_cache, GFP_NOFS | __GFP_NOFAIL);
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/*
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* Grab an extra reference to the name/value buffer for this log item.
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* The caller retains its own reference!
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*/
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attrip->attri_nameval = xfs_attri_log_nameval_get(nv);
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ASSERT(attrip->attri_nameval);
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xfs_log_item_init(mp, &attrip->attri_item, XFS_LI_ATTRI,
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&xfs_attri_item_ops);
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attrip->attri_format.alfi_id = (uintptr_t)(void *)attrip;
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atomic_set(&attrip->attri_refcount, 2);
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return attrip;
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}
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/*
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* Copy an attr format buffer from the given buf, and into the destination attr
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* format structure.
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*/
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STATIC int
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xfs_attri_copy_format(
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struct xfs_log_iovec *buf,
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struct xfs_attri_log_format *dst_attr_fmt)
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{
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struct xfs_attri_log_format *src_attr_fmt = buf->i_addr;
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size_t len;
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len = sizeof(struct xfs_attri_log_format);
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if (buf->i_len != len) {
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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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memcpy((char *)dst_attr_fmt, (char *)src_attr_fmt, len);
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return 0;
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}
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static inline struct xfs_attrd_log_item *ATTRD_ITEM(struct xfs_log_item *lip)
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{
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return container_of(lip, struct xfs_attrd_log_item, attrd_item);
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}
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STATIC void
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xfs_attrd_item_free(struct xfs_attrd_log_item *attrdp)
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{
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kmem_free(attrdp->attrd_item.li_lv_shadow);
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kmem_cache_free(xfs_attrd_cache, attrdp);
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}
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STATIC void
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xfs_attrd_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 += sizeof(struct xfs_attrd_log_format);
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}
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/*
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* This is called to fill in the log iovecs for the given attrd log item. We use
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* only 1 iovec for the attrd_format, and we point that at the attr_log_format
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* structure embedded in the attrd item.
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*/
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STATIC void
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xfs_attrd_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_attrd_log_item *attrdp = ATTRD_ITEM(lip);
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struct xfs_log_iovec *vecp = NULL;
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attrdp->attrd_format.alfd_type = XFS_LI_ATTRD;
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attrdp->attrd_format.alfd_size = 1;
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xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTRD_FORMAT,
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&attrdp->attrd_format,
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sizeof(struct xfs_attrd_log_format));
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}
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/*
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* The ATTRD is either committed or aborted if the transaction is canceled. If
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* the transaction is canceled, drop our reference to the ATTRI and free the
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* ATTRD.
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*/
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STATIC void
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xfs_attrd_item_release(
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struct xfs_log_item *lip)
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{
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struct xfs_attrd_log_item *attrdp = ATTRD_ITEM(lip);
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xfs_attri_release(attrdp->attrd_attrip);
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xfs_attrd_item_free(attrdp);
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}
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static struct xfs_log_item *
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xfs_attrd_item_intent(
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struct xfs_log_item *lip)
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{
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return &ATTRD_ITEM(lip)->attrd_attrip->attri_item;
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}
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/*
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* Performs one step of an attribute update intent and marks the attrd item
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* dirty.. An attr operation may be a set or a remove. Note that the
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* transaction is marked dirty regardless of whether the operation succeeds or
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* fails to support the ATTRI/ATTRD lifecycle rules.
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*/
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STATIC int
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xfs_xattri_finish_update(
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struct xfs_attr_intent *attr,
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struct xfs_attrd_log_item *attrdp)
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{
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struct xfs_da_args *args = attr->xattri_da_args;
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int error;
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if (XFS_TEST_ERROR(false, args->dp->i_mount, XFS_ERRTAG_LARP)) {
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error = -EIO;
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goto out;
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}
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error = xfs_attr_set_iter(attr);
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if (!error && attr->xattri_dela_state != XFS_DAS_DONE)
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error = -EAGAIN;
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out:
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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 ATTRI and frees the ATTRD
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* 2.) shuts down the filesystem
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*/
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args->trans->t_flags |= XFS_TRANS_DIRTY | XFS_TRANS_HAS_INTENT_DONE;
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/*
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* attr intent/done items are null when logged attributes are disabled
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*/
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if (attrdp)
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set_bit(XFS_LI_DIRTY, &attrdp->attrd_item.li_flags);
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return error;
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}
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/* Log an attr to the intent item. */
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STATIC void
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xfs_attr_log_item(
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struct xfs_trans *tp,
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struct xfs_attri_log_item *attrip,
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const struct xfs_attr_intent *attr)
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{
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struct xfs_attri_log_format *attrp;
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tp->t_flags |= XFS_TRANS_DIRTY;
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set_bit(XFS_LI_DIRTY, &attrip->attri_item.li_flags);
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/*
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* At this point the xfs_attr_intent has been constructed, and we've
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* created the log intent. Fill in the attri log item and log format
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* structure with fields from this xfs_attr_intent
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*/
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attrp = &attrip->attri_format;
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attrp->alfi_ino = attr->xattri_da_args->dp->i_ino;
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ASSERT(!(attr->xattri_op_flags & ~XFS_ATTRI_OP_FLAGS_TYPE_MASK));
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attrp->alfi_op_flags = attr->xattri_op_flags;
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attrp->alfi_value_len = attr->xattri_nameval->value.i_len;
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attrp->alfi_name_len = attr->xattri_nameval->name.i_len;
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ASSERT(!(attr->xattri_da_args->attr_filter & ~XFS_ATTRI_FILTER_MASK));
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attrp->alfi_attr_filter = attr->xattri_da_args->attr_filter;
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}
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/* Get an ATTRI. */
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static struct xfs_log_item *
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xfs_attr_create_intent(
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struct xfs_trans *tp,
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struct list_head *items,
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unsigned int count,
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bool sort)
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{
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struct xfs_mount *mp = tp->t_mountp;
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struct xfs_attri_log_item *attrip;
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struct xfs_attr_intent *attr;
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struct xfs_da_args *args;
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ASSERT(count == 1);
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/*
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* Each attr item only performs one attribute operation at a time, so
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* this is a list of one
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*/
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attr = list_first_entry_or_null(items, struct xfs_attr_intent,
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xattri_list);
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args = attr->xattri_da_args;
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if (!(args->op_flags & XFS_DA_OP_LOGGED))
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return NULL;
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/*
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* Create a buffer to store the attribute name and value. This buffer
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* will be shared between the higher level deferred xattr work state
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* and the lower level xattr log items.
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*/
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if (!attr->xattri_nameval) {
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/*
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* Transfer our reference to the name/value buffer to the
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* deferred work state structure.
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*/
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attr->xattri_nameval = xfs_attri_log_nameval_alloc(args->name,
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args->namelen, args->value, args->valuelen);
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}
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if (!attr->xattri_nameval)
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return ERR_PTR(-ENOMEM);
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attrip = xfs_attri_init(mp, attr->xattri_nameval);
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xfs_trans_add_item(tp, &attrip->attri_item);
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xfs_attr_log_item(tp, attrip, attr);
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return &attrip->attri_item;
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}
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static inline void
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xfs_attr_free_item(
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struct xfs_attr_intent *attr)
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{
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if (attr->xattri_da_state)
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xfs_da_state_free(attr->xattri_da_state);
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xfs_attri_log_nameval_put(attr->xattri_nameval);
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if (attr->xattri_da_args->op_flags & XFS_DA_OP_RECOVERY)
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kmem_free(attr);
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else
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kmem_cache_free(xfs_attr_intent_cache, attr);
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}
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/* Process an attr. */
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STATIC int
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xfs_attr_finish_item(
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struct xfs_trans *tp,
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struct xfs_log_item *done,
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struct list_head *item,
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struct xfs_btree_cur **state)
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{
|
|
struct xfs_attr_intent *attr;
|
|
struct xfs_attrd_log_item *done_item = NULL;
|
|
int error;
|
|
|
|
attr = container_of(item, struct xfs_attr_intent, xattri_list);
|
|
if (done)
|
|
done_item = ATTRD_ITEM(done);
|
|
|
|
/*
|
|
* Always reset trans after EAGAIN cycle
|
|
* since the transaction is new
|
|
*/
|
|
attr->xattri_da_args->trans = tp;
|
|
|
|
error = xfs_xattri_finish_update(attr, done_item);
|
|
if (error != -EAGAIN)
|
|
xfs_attr_free_item(attr);
|
|
|
|
return error;
|
|
}
|
|
|
|
/* Abort all pending ATTRs. */
|
|
STATIC void
|
|
xfs_attr_abort_intent(
|
|
struct xfs_log_item *intent)
|
|
{
|
|
xfs_attri_release(ATTRI_ITEM(intent));
|
|
}
|
|
|
|
/* Cancel an attr */
|
|
STATIC void
|
|
xfs_attr_cancel_item(
|
|
struct list_head *item)
|
|
{
|
|
struct xfs_attr_intent *attr;
|
|
|
|
attr = container_of(item, struct xfs_attr_intent, xattri_list);
|
|
xfs_attr_free_item(attr);
|
|
}
|
|
|
|
STATIC bool
|
|
xfs_attri_item_match(
|
|
struct xfs_log_item *lip,
|
|
uint64_t intent_id)
|
|
{
|
|
return ATTRI_ITEM(lip)->attri_format.alfi_id == intent_id;
|
|
}
|
|
|
|
/* Is this recovered ATTRI format ok? */
|
|
static inline bool
|
|
xfs_attri_validate(
|
|
struct xfs_mount *mp,
|
|
struct xfs_attri_log_format *attrp)
|
|
{
|
|
unsigned int op = attrp->alfi_op_flags &
|
|
XFS_ATTRI_OP_FLAGS_TYPE_MASK;
|
|
|
|
if (attrp->__pad != 0)
|
|
return false;
|
|
|
|
if (attrp->alfi_op_flags & ~XFS_ATTRI_OP_FLAGS_TYPE_MASK)
|
|
return false;
|
|
|
|
if (attrp->alfi_attr_filter & ~XFS_ATTRI_FILTER_MASK)
|
|
return false;
|
|
|
|
/* alfi_op_flags should be either a set or remove */
|
|
switch (op) {
|
|
case XFS_ATTRI_OP_FLAGS_SET:
|
|
case XFS_ATTRI_OP_FLAGS_REPLACE:
|
|
case XFS_ATTRI_OP_FLAGS_REMOVE:
|
|
break;
|
|
default:
|
|
return false;
|
|
}
|
|
|
|
if (attrp->alfi_value_len > XATTR_SIZE_MAX)
|
|
return false;
|
|
|
|
if ((attrp->alfi_name_len > XATTR_NAME_MAX) ||
|
|
(attrp->alfi_name_len == 0))
|
|
return false;
|
|
|
|
return xfs_verify_ino(mp, attrp->alfi_ino);
|
|
}
|
|
|
|
/*
|
|
* Process an attr intent item that was recovered from the log. We need to
|
|
* delete the attr that it describes.
|
|
*/
|
|
STATIC int
|
|
xfs_attri_item_recover(
|
|
struct xfs_log_item *lip,
|
|
struct list_head *capture_list)
|
|
{
|
|
struct xfs_attri_log_item *attrip = ATTRI_ITEM(lip);
|
|
struct xfs_attr_intent *attr;
|
|
struct xfs_mount *mp = lip->li_log->l_mp;
|
|
struct xfs_inode *ip;
|
|
struct xfs_da_args *args;
|
|
struct xfs_trans *tp;
|
|
struct xfs_trans_res tres;
|
|
struct xfs_attri_log_format *attrp;
|
|
struct xfs_attri_log_nameval *nv = attrip->attri_nameval;
|
|
int error;
|
|
int total;
|
|
int local;
|
|
struct xfs_attrd_log_item *done_item = NULL;
|
|
|
|
/*
|
|
* First check the validity of the attr described by the ATTRI. If any
|
|
* are bad, then assume that all are bad and just toss the ATTRI.
|
|
*/
|
|
attrp = &attrip->attri_format;
|
|
if (!xfs_attri_validate(mp, attrp) ||
|
|
!xfs_attr_namecheck(nv->name.i_addr, nv->name.i_len))
|
|
return -EFSCORRUPTED;
|
|
|
|
error = xlog_recover_iget(mp, attrp->alfi_ino, &ip);
|
|
if (error)
|
|
return error;
|
|
|
|
attr = kmem_zalloc(sizeof(struct xfs_attr_intent) +
|
|
sizeof(struct xfs_da_args), KM_NOFS);
|
|
args = (struct xfs_da_args *)(attr + 1);
|
|
|
|
attr->xattri_da_args = args;
|
|
attr->xattri_op_flags = attrp->alfi_op_flags &
|
|
XFS_ATTRI_OP_FLAGS_TYPE_MASK;
|
|
|
|
/*
|
|
* We're reconstructing the deferred work state structure from the
|
|
* recovered log item. Grab a reference to the name/value buffer and
|
|
* attach it to the new work state.
|
|
*/
|
|
attr->xattri_nameval = xfs_attri_log_nameval_get(nv);
|
|
ASSERT(attr->xattri_nameval);
|
|
|
|
args->dp = ip;
|
|
args->geo = mp->m_attr_geo;
|
|
args->whichfork = XFS_ATTR_FORK;
|
|
args->name = nv->name.i_addr;
|
|
args->namelen = nv->name.i_len;
|
|
args->hashval = xfs_da_hashname(args->name, args->namelen);
|
|
args->attr_filter = attrp->alfi_attr_filter & XFS_ATTRI_FILTER_MASK;
|
|
args->op_flags = XFS_DA_OP_RECOVERY | XFS_DA_OP_OKNOENT |
|
|
XFS_DA_OP_LOGGED;
|
|
|
|
ASSERT(xfs_sb_version_haslogxattrs(&mp->m_sb));
|
|
|
|
switch (attr->xattri_op_flags) {
|
|
case XFS_ATTRI_OP_FLAGS_SET:
|
|
case XFS_ATTRI_OP_FLAGS_REPLACE:
|
|
args->value = nv->value.i_addr;
|
|
args->valuelen = nv->value.i_len;
|
|
args->total = xfs_attr_calc_size(args, &local);
|
|
if (xfs_inode_hasattr(args->dp))
|
|
attr->xattri_dela_state = xfs_attr_init_replace_state(args);
|
|
else
|
|
attr->xattri_dela_state = xfs_attr_init_add_state(args);
|
|
break;
|
|
case XFS_ATTRI_OP_FLAGS_REMOVE:
|
|
if (!xfs_inode_hasattr(args->dp))
|
|
goto out;
|
|
attr->xattri_dela_state = xfs_attr_init_remove_state(args);
|
|
break;
|
|
default:
|
|
ASSERT(0);
|
|
error = -EFSCORRUPTED;
|
|
goto out;
|
|
}
|
|
|
|
xfs_init_attr_trans(args, &tres, &total);
|
|
error = xfs_trans_alloc(mp, &tres, total, 0, XFS_TRANS_RESERVE, &tp);
|
|
if (error)
|
|
goto out;
|
|
|
|
args->trans = tp;
|
|
done_item = xfs_trans_get_attrd(tp, attrip);
|
|
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
xfs_trans_ijoin(tp, ip, 0);
|
|
|
|
error = xfs_xattri_finish_update(attr, done_item);
|
|
if (error == -EAGAIN) {
|
|
/*
|
|
* There's more work to do, so add the intent item to this
|
|
* transaction so that we can continue it later.
|
|
*/
|
|
xfs_defer_add(tp, XFS_DEFER_OPS_TYPE_ATTR, &attr->xattri_list);
|
|
error = xfs_defer_ops_capture_and_commit(tp, capture_list);
|
|
if (error)
|
|
goto out_unlock;
|
|
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
xfs_irele(ip);
|
|
return 0;
|
|
}
|
|
if (error) {
|
|
xfs_trans_cancel(tp);
|
|
goto out_unlock;
|
|
}
|
|
|
|
error = xfs_defer_ops_capture_and_commit(tp, capture_list);
|
|
out_unlock:
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
xfs_irele(ip);
|
|
out:
|
|
xfs_attr_free_item(attr);
|
|
return error;
|
|
}
|
|
|
|
/* Re-log an intent item to push the log tail forward. */
|
|
static struct xfs_log_item *
|
|
xfs_attri_item_relog(
|
|
struct xfs_log_item *intent,
|
|
struct xfs_trans *tp)
|
|
{
|
|
struct xfs_attrd_log_item *attrdp;
|
|
struct xfs_attri_log_item *old_attrip;
|
|
struct xfs_attri_log_item *new_attrip;
|
|
struct xfs_attri_log_format *new_attrp;
|
|
struct xfs_attri_log_format *old_attrp;
|
|
|
|
old_attrip = ATTRI_ITEM(intent);
|
|
old_attrp = &old_attrip->attri_format;
|
|
|
|
tp->t_flags |= XFS_TRANS_DIRTY;
|
|
attrdp = xfs_trans_get_attrd(tp, old_attrip);
|
|
set_bit(XFS_LI_DIRTY, &attrdp->attrd_item.li_flags);
|
|
|
|
/*
|
|
* Create a new log item that shares the same name/value buffer as the
|
|
* old log item.
|
|
*/
|
|
new_attrip = xfs_attri_init(tp->t_mountp, old_attrip->attri_nameval);
|
|
new_attrp = &new_attrip->attri_format;
|
|
|
|
new_attrp->alfi_ino = old_attrp->alfi_ino;
|
|
new_attrp->alfi_op_flags = old_attrp->alfi_op_flags;
|
|
new_attrp->alfi_value_len = old_attrp->alfi_value_len;
|
|
new_attrp->alfi_name_len = old_attrp->alfi_name_len;
|
|
new_attrp->alfi_attr_filter = old_attrp->alfi_attr_filter;
|
|
|
|
xfs_trans_add_item(tp, &new_attrip->attri_item);
|
|
set_bit(XFS_LI_DIRTY, &new_attrip->attri_item.li_flags);
|
|
|
|
return &new_attrip->attri_item;
|
|
}
|
|
|
|
STATIC int
|
|
xlog_recover_attri_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_attri_log_item *attrip;
|
|
struct xfs_attri_log_format *attri_formatp;
|
|
struct xfs_attri_log_nameval *nv;
|
|
const void *attr_value = NULL;
|
|
const void *attr_name;
|
|
int error;
|
|
|
|
attri_formatp = item->ri_buf[0].i_addr;
|
|
attr_name = item->ri_buf[1].i_addr;
|
|
|
|
/* Validate xfs_attri_log_format before the large memory allocation */
|
|
if (!xfs_attri_validate(mp, attri_formatp)) {
|
|
XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW, mp);
|
|
return -EFSCORRUPTED;
|
|
}
|
|
|
|
if (!xfs_attr_namecheck(attr_name, attri_formatp->alfi_name_len)) {
|
|
XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW, mp);
|
|
return -EFSCORRUPTED;
|
|
}
|
|
|
|
if (attri_formatp->alfi_value_len)
|
|
attr_value = item->ri_buf[2].i_addr;
|
|
|
|
/*
|
|
* Memory alloc failure will cause replay to abort. We attach the
|
|
* name/value buffer to the recovered incore log item and drop our
|
|
* reference.
|
|
*/
|
|
nv = xfs_attri_log_nameval_alloc(attr_name,
|
|
attri_formatp->alfi_name_len, attr_value,
|
|
attri_formatp->alfi_value_len);
|
|
if (!nv)
|
|
return -ENOMEM;
|
|
|
|
attrip = xfs_attri_init(mp, nv);
|
|
error = xfs_attri_copy_format(&item->ri_buf[0], &attrip->attri_format);
|
|
if (error)
|
|
goto out;
|
|
|
|
/*
|
|
* The ATTRI has two references. One for the ATTRD and one for ATTRI to
|
|
* ensure it makes it into the AIL. Insert the ATTRI into the AIL
|
|
* directly and drop the ATTRI reference. Note that
|
|
* xfs_trans_ail_update() drops the AIL lock.
|
|
*/
|
|
xfs_trans_ail_insert(log->l_ailp, &attrip->attri_item, lsn);
|
|
xfs_attri_release(attrip);
|
|
xfs_attri_log_nameval_put(nv);
|
|
return 0;
|
|
out:
|
|
xfs_attri_item_free(attrip);
|
|
xfs_attri_log_nameval_put(nv);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* This routine is called to allocate an "attr free done" log item.
|
|
*/
|
|
static struct xfs_attrd_log_item *
|
|
xfs_trans_get_attrd(struct xfs_trans *tp,
|
|
struct xfs_attri_log_item *attrip)
|
|
{
|
|
struct xfs_attrd_log_item *attrdp;
|
|
|
|
ASSERT(tp != NULL);
|
|
|
|
attrdp = kmem_cache_zalloc(xfs_attrd_cache, GFP_NOFS | __GFP_NOFAIL);
|
|
|
|
xfs_log_item_init(tp->t_mountp, &attrdp->attrd_item, XFS_LI_ATTRD,
|
|
&xfs_attrd_item_ops);
|
|
attrdp->attrd_attrip = attrip;
|
|
attrdp->attrd_format.alfd_alf_id = attrip->attri_format.alfi_id;
|
|
|
|
xfs_trans_add_item(tp, &attrdp->attrd_item);
|
|
return attrdp;
|
|
}
|
|
|
|
/* Get an ATTRD so we can process all the attrs. */
|
|
static struct xfs_log_item *
|
|
xfs_attr_create_done(
|
|
struct xfs_trans *tp,
|
|
struct xfs_log_item *intent,
|
|
unsigned int count)
|
|
{
|
|
if (!intent)
|
|
return NULL;
|
|
|
|
return &xfs_trans_get_attrd(tp, ATTRI_ITEM(intent))->attrd_item;
|
|
}
|
|
|
|
const struct xfs_defer_op_type xfs_attr_defer_type = {
|
|
.max_items = 1,
|
|
.create_intent = xfs_attr_create_intent,
|
|
.abort_intent = xfs_attr_abort_intent,
|
|
.create_done = xfs_attr_create_done,
|
|
.finish_item = xfs_attr_finish_item,
|
|
.cancel_item = xfs_attr_cancel_item,
|
|
};
|
|
|
|
/*
|
|
* This routine is called when an ATTRD format structure is found in a committed
|
|
* transaction in the log. Its purpose is to cancel the corresponding ATTRI if
|
|
* it was still in the log. To do this it searches the AIL for the ATTRI with
|
|
* an id equal to that in the ATTRD format structure. If we find it we drop
|
|
* the ATTRD reference, which removes the ATTRI from the AIL and frees it.
|
|
*/
|
|
STATIC int
|
|
xlog_recover_attrd_commit_pass2(
|
|
struct xlog *log,
|
|
struct list_head *buffer_list,
|
|
struct xlog_recover_item *item,
|
|
xfs_lsn_t lsn)
|
|
{
|
|
struct xfs_attrd_log_format *attrd_formatp;
|
|
|
|
attrd_formatp = item->ri_buf[0].i_addr;
|
|
if (item->ri_buf[0].i_len != sizeof(struct xfs_attrd_log_format)) {
|
|
XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW, NULL);
|
|
return -EFSCORRUPTED;
|
|
}
|
|
|
|
xlog_recover_release_intent(log, XFS_LI_ATTRI,
|
|
attrd_formatp->alfd_alf_id);
|
|
return 0;
|
|
}
|
|
|
|
static const struct xfs_item_ops xfs_attri_item_ops = {
|
|
.flags = XFS_ITEM_INTENT,
|
|
.iop_size = xfs_attri_item_size,
|
|
.iop_format = xfs_attri_item_format,
|
|
.iop_unpin = xfs_attri_item_unpin,
|
|
.iop_release = xfs_attri_item_release,
|
|
.iop_recover = xfs_attri_item_recover,
|
|
.iop_match = xfs_attri_item_match,
|
|
.iop_relog = xfs_attri_item_relog,
|
|
};
|
|
|
|
const struct xlog_recover_item_ops xlog_attri_item_ops = {
|
|
.item_type = XFS_LI_ATTRI,
|
|
.commit_pass2 = xlog_recover_attri_commit_pass2,
|
|
};
|
|
|
|
static const struct xfs_item_ops xfs_attrd_item_ops = {
|
|
.flags = XFS_ITEM_RELEASE_WHEN_COMMITTED |
|
|
XFS_ITEM_INTENT_DONE,
|
|
.iop_size = xfs_attrd_item_size,
|
|
.iop_format = xfs_attrd_item_format,
|
|
.iop_release = xfs_attrd_item_release,
|
|
.iop_intent = xfs_attrd_item_intent,
|
|
};
|
|
|
|
const struct xlog_recover_item_ops xlog_attrd_item_ops = {
|
|
.item_type = XFS_LI_ATTRD,
|
|
.commit_pass2 = xlog_recover_attrd_commit_pass2,
|
|
};
|