Release 4.10 fs/xfs/xfs_extfree_item.c
/*
* Copyright (c) 2000-2001,2005 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_format.h"
#include "xfs_log_format.h"
#include "xfs_trans_resv.h"
#include "xfs_bit.h"
#include "xfs_mount.h"
#include "xfs_trans.h"
#include "xfs_trans_priv.h"
#include "xfs_buf_item.h"
#include "xfs_extfree_item.h"
#include "xfs_log.h"
#include "xfs_btree.h"
#include "xfs_rmap.h"
kmem_zone_t *xfs_efi_zone;
kmem_zone_t *xfs_efd_zone;
static inline struct xfs_efi_log_item *EFI_ITEM(struct xfs_log_item *lip)
{
return container_of(lip, struct xfs_efi_log_item, efi_item);
}
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| Total | 25 | 100.00% | 2 | 100.00% |
void
xfs_efi_item_free(
struct xfs_efi_log_item *efip)
{
kmem_free(efip->efi_item.li_lv_shadow);
if (efip->efi_format.efi_nextents > XFS_EFI_MAX_FAST_EXTENTS)
kmem_free(efip);
else
kmem_zone_free(xfs_efi_zone, efip);
}
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| christoph hellwig | christoph hellwig | 33 | 78.57% | 2 | 66.67% |
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| Total | 42 | 100.00% | 3 | 100.00% |
/*
* This returns the number of iovecs needed to log the given efi item.
* We only need 1 iovec for an efi item. It just logs the efi_log_format
* structure.
*/
static inline int
xfs_efi_item_sizeof(
struct xfs_efi_log_item *efip)
{
return sizeof(struct xfs_efi_log_format) +
(efip->efi_format.efi_nextents - 1) * sizeof(xfs_extent_t);
}
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STATIC void
xfs_efi_item_size(
struct xfs_log_item *lip,
int *nvecs,
int *nbytes)
{
*nvecs += 1;
*nbytes += xfs_efi_item_sizeof(EFI_ITEM(lip));
}
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| dave chinner | dave chinner | 24 | 68.57% | 1 | 33.33% |
| christoph hellwig | christoph hellwig | 11 | 31.43% | 2 | 66.67% |
| Total | 35 | 100.00% | 3 | 100.00% |
/*
* This is called to fill in the vector of log iovecs for the
* given efi log item. We use only 1 iovec, and we point that
* at the efi_log_format structure embedded in the efi item.
* It is at this point that we assert that all of the extent
* slots in the efi item have been filled.
*/
STATIC void
xfs_efi_item_format(
struct xfs_log_item *lip,
struct xfs_log_vec *lv)
{
struct xfs_efi_log_item *efip = EFI_ITEM(lip);
struct xfs_log_iovec *vecp = NULL;
ASSERT(atomic_read(&efip->efi_next_extent) ==
efip->efi_format.efi_nextents);
efip->efi_format.efi_type = XFS_LI_EFI;
efip->efi_format.efi_size = 1;
xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_EFI_FORMAT,
&efip->efi_format,
xfs_efi_item_sizeof(efip));
}
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| dave chinner | dave chinner | 8 | 9.30% | 2 | 33.33% |
| Total | 86 | 100.00% | 6 | 100.00% |
/*
* Pinning has no meaning for an efi item, so just return.
*/
STATIC void
xfs_efi_item_pin(
struct xfs_log_item *lip)
{
}
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| Person | Tokens | Prop | Commits | CommitProp |
| christoph hellwig | christoph hellwig | 10 | 100.00% | 2 | 100.00% |
| Total | 10 | 100.00% | 2 | 100.00% |
/*
* The unpin operation is the last place an EFI is manipulated in the log. It is
* either inserted in the AIL or aborted in the event of a log I/O error. In
* either case, the EFI transaction has been successfully committed to make it
* this far. Therefore, we expect whoever committed the EFI to either construct
* and commit the EFD or drop the EFD's reference in the event of error. Simply
* drop the log's EFI reference now that the log is done with it.
*/
STATIC void
xfs_efi_item_unpin(
struct xfs_log_item *lip,
int remove)
{
struct xfs_efi_log_item *efip = EFI_ITEM(lip);
xfs_efi_release(efip);
}
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| christoph hellwig | christoph hellwig | 26 | 89.66% | 3 | 50.00% |
| brian foster | brian foster | 1 | 3.45% | 1 | 16.67% |
| dave chinner | dave chinner | 1 | 3.45% | 1 | 16.67% |
| david chinner | david chinner | 1 | 3.45% | 1 | 16.67% |
| Total | 29 | 100.00% | 6 | 100.00% |
/*
* Efi items have no locking or pushing. However, since EFIs are pulled from
* the AIL when their corresponding EFDs are committed to disk, their situation
* is very similar to being pinned. Return XFS_ITEM_PINNED so that the caller
* will eventually flush the log. This should help in getting the EFI out of
* the AIL.
*/
STATIC uint
xfs_efi_item_push(
struct xfs_log_item *lip,
struct list_head *buffer_list)
{
return XFS_ITEM_PINNED;
}
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| christoph hellwig | christoph hellwig | 19 | 100.00% | 3 | 100.00% |
| Total | 19 | 100.00% | 3 | 100.00% |
/*
* The EFI has been either committed or aborted if the transaction has been
* cancelled. If the transaction was cancelled, an EFD isn't going to be
* constructed and thus we free the EFI here directly.
*/
STATIC void
xfs_efi_item_unlock(
struct xfs_log_item *lip)
{
if (lip->li_flags & XFS_LI_ABORTED)
xfs_efi_item_free(EFI_ITEM(lip));
}
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| christoph hellwig | christoph hellwig | 26 | 96.30% | 2 | 66.67% |
| eric sandeen | eric sandeen | 1 | 3.70% | 1 | 33.33% |
| Total | 27 | 100.00% | 3 | 100.00% |
/*
* The EFI is logged only once and cannot be moved in the log, so simply return
* the lsn at which it's been logged.
*/
STATIC xfs_lsn_t
xfs_efi_item_committed(
struct xfs_log_item *lip,
xfs_lsn_t lsn)
{
return lsn;
}
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| Person | Tokens | Prop | Commits | CommitProp |
| christoph hellwig | christoph hellwig | 17 | 100.00% | 2 | 100.00% |
| Total | 17 | 100.00% | 2 | 100.00% |
/*
* The EFI dependency tracking op doesn't do squat. It can't because
* it doesn't know where the free extent is coming from. The dependency
* tracking has to be handled by the "enclosing" metadata object. For
* example, for inodes, the inode is locked throughout the extent freeing
* so the dependency should be recorded there.
*/
STATIC void
xfs_efi_item_committing(
struct xfs_log_item *lip,
xfs_lsn_t lsn)
{
}
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| Person | Tokens | Prop | Commits | CommitProp |
| christoph hellwig | christoph hellwig | 13 | 100.00% | 2 | 100.00% |
| Total | 13 | 100.00% | 2 | 100.00% |
/*
* This is the ops vector shared by all efi log items.
*/
static const struct xfs_item_ops xfs_efi_item_ops = {
.iop_size = xfs_efi_item_size,
.iop_format = xfs_efi_item_format,
.iop_pin = xfs_efi_item_pin,
.iop_unpin = xfs_efi_item_unpin,
.iop_unlock = xfs_efi_item_unlock,
.iop_committed = xfs_efi_item_committed,
.iop_push = xfs_efi_item_push,
.iop_committing = xfs_efi_item_committing
};
/*
* Allocate and initialize an efi item with the given number of extents.
*/
struct xfs_efi_log_item *
xfs_efi_init(
struct xfs_mount *mp,
uint nextents)
{
struct xfs_efi_log_item *efip;
uint size;
ASSERT(nextents > 0);
if (nextents > XFS_EFI_MAX_FAST_EXTENTS) {
size = (uint)(sizeof(xfs_efi_log_item_t) +
((nextents - 1) * sizeof(xfs_extent_t)));
efip = kmem_zalloc(size, KM_SLEEP);
} else {
efip = kmem_zone_zalloc(xfs_efi_zone, KM_SLEEP);
}
xfs_log_item_init(mp, &efip->efi_item, XFS_LI_EFI, &xfs_efi_item_ops);
efip->efi_format.efi_nextents = nextents;
efip->efi_format.efi_id = (uintptr_t)(void *)efip;
atomic_set(&efip->efi_next_extent, 0);
atomic_set(&efip->efi_refcount, 2);
return efip;
}
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| christoph hellwig | christoph hellwig | 114 | 78.62% | 3 | 42.86% |
| dave chinner | dave chinner | 28 | 19.31% | 3 | 42.86% |
| david chinner | david chinner | 3 | 2.07% | 1 | 14.29% |
| Total | 145 | 100.00% | 7 | 100.00% |
/*
* Copy an EFI format buffer from the given buf, and into the destination
* EFI format structure.
* The given buffer can be in 32 bit or 64 bit form (which has different padding),
* one of which will be the native format for this kernel.
* It will handle the conversion of formats if necessary.
*/
int
xfs_efi_copy_format(xfs_log_iovec_t *buf, xfs_efi_log_format_t *dst_efi_fmt)
{
xfs_efi_log_format_t *src_efi_fmt = buf->i_addr;
uint i;
uint len = sizeof(xfs_efi_log_format_t) +
(src_efi_fmt->efi_nextents - 1) * sizeof(xfs_extent_t);
uint len32 = sizeof(xfs_efi_log_format_32_t) +
(src_efi_fmt->efi_nextents - 1) * sizeof(xfs_extent_32_t);
uint len64 = sizeof(xfs_efi_log_format_64_t) +
(src_efi_fmt->efi_nextents - 1) * sizeof(xfs_extent_64_t);
if (buf->i_len == len) {
memcpy((char *)dst_efi_fmt, (char*)src_efi_fmt, len);
return 0;
} else if (buf->i_len == len32) {
xfs_efi_log_format_32_t *src_efi_fmt_32 = buf->i_addr;
dst_efi_fmt->efi_type = src_efi_fmt_32->efi_type;
dst_efi_fmt->efi_size = src_efi_fmt_32->efi_size;
dst_efi_fmt->efi_nextents = src_efi_fmt_32->efi_nextents;
dst_efi_fmt->efi_id = src_efi_fmt_32->efi_id;
for (i = 0; i < dst_efi_fmt->efi_nextents; i++) {
dst_efi_fmt->efi_extents[i].ext_start =
src_efi_fmt_32->efi_extents[i].ext_start;
dst_efi_fmt->efi_extents[i].ext_len =
src_efi_fmt_32->efi_extents[i].ext_len;
}
return 0;
} else if (buf->i_len == len64) {
xfs_efi_log_format_64_t *src_efi_fmt_64 = buf->i_addr;
dst_efi_fmt->efi_type = src_efi_fmt_64->efi_type;
dst_efi_fmt->efi_size = src_efi_fmt_64->efi_size;
dst_efi_fmt->efi_nextents = src_efi_fmt_64->efi_nextents;
dst_efi_fmt->efi_id = src_efi_fmt_64->efi_id;
for (i = 0; i < dst_efi_fmt->efi_nextents; i++) {
dst_efi_fmt->efi_extents[i].ext_start =
src_efi_fmt_64->efi_extents[i].ext_start;
dst_efi_fmt->efi_extents[i].ext_len =
src_efi_fmt_64->efi_extents[i].ext_len;
}
return 0;
}
return -EFSCORRUPTED;
}
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| Total | 335 | 100.00% | 2 | 100.00% |
/*
* Freeing the efi requires that we remove it from the AIL if it has already
* been placed there. However, the EFI may not yet have been placed in the AIL
* when called by xfs_efi_release() from EFD processing due to the ordering of
* committed vs unpin operations in bulk insert operations. Hence the reference
* count to ensure only the last caller frees the EFI.
*/
void
xfs_efi_release(
struct xfs_efi_log_item *efip)
{
if (atomic_dec_and_test(&efip->efi_refcount)) {
xfs_trans_ail_remove(&efip->efi_item, SHUTDOWN_LOG_IO_ERROR);
xfs_efi_item_free(efip);
}
}
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| christoph hellwig | christoph hellwig | 7 | 18.92% | 1 | 16.67% |
| Total | 37 | 100.00% | 6 | 100.00% |
static inline struct xfs_efd_log_item *EFD_ITEM(struct xfs_log_item *lip)
{
return container_of(lip, struct xfs_efd_log_item, efd_item);
}
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| christoph hellwig | christoph hellwig | 25 | 100.00% | 1 | 100.00% |
| Total | 25 | 100.00% | 1 | 100.00% |
STATIC void
xfs_efd_item_free(struct xfs_efd_log_item *efdp)
{
kmem_free(efdp->efd_item.li_lv_shadow);
if (efdp->efd_format.efd_nextents > XFS_EFD_MAX_FAST_EXTENTS)
kmem_free(efdp);
else
kmem_zone_free(xfs_efd_zone, efdp);
}
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| christoph hellwig | christoph hellwig | 34 | 79.07% | 3 | 75.00% |
| dave chinner | dave chinner | 9 | 20.93% | 1 | 25.00% |
| Total | 43 | 100.00% | 4 | 100.00% |
/*
* This returns the number of iovecs needed to log the given efd item.
* We only need 1 iovec for an efd item. It just logs the efd_log_format
* structure.
*/
static inline int
xfs_efd_item_sizeof(
struct xfs_efd_log_item *efdp)
{
return sizeof(xfs_efd_log_format_t) +
(efdp->efd_format.efd_nextents - 1) * sizeof(xfs_extent_t);
}
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| dave chinner | dave chinner | 33 | 100.00% | 1 | 100.00% |
| Total | 33 | 100.00% | 1 | 100.00% |
STATIC void
xfs_efd_item_size(
struct xfs_log_item *lip,
int *nvecs,
int *nbytes)
{
*nvecs += 1;
*nbytes += xfs_efd_item_sizeof(EFD_ITEM(lip));
}
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| Person | Tokens | Prop | Commits | CommitProp |
| dave chinner | dave chinner | 24 | 68.57% | 1 | 33.33% |
| christoph hellwig | christoph hellwig | 11 | 31.43% | 2 | 66.67% |
| Total | 35 | 100.00% | 3 | 100.00% |
/*
* This is called to fill in the vector of log iovecs for the
* given efd log item. We use only 1 iovec, and we point that
* at the efd_log_format structure embedded in the efd item.
* It is at this point that we assert that all of the extent
* slots in the efd item have been filled.
*/
STATIC void
xfs_efd_item_format(
struct xfs_log_item *lip,
struct xfs_log_vec *lv)
{
struct xfs_efd_log_item *efdp = EFD_ITEM(lip);
struct xfs_log_iovec *vecp = NULL;
ASSERT(efdp->efd_next_extent == efdp->efd_format.efd_nextents);
efdp->efd_format.efd_type = XFS_LI_EFD;
efdp->efd_format.efd_size = 1;
xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_EFD_FORMAT,
&efdp->efd_format,
xfs_efd_item_sizeof(efdp));
}
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| christoph hellwig | christoph hellwig | 78 | 95.12% | 4 | 80.00% |
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| Total | 82 | 100.00% | 5 | 100.00% |
/*
* Pinning has no meaning for an efd item, so just return.
*/
STATIC void
xfs_efd_item_pin(
struct xfs_log_item *lip)
{
}
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| Person | Tokens | Prop | Commits | CommitProp |
| christoph hellwig | christoph hellwig | 10 | 100.00% | 2 | 100.00% |
| Total | 10 | 100.00% | 2 | 100.00% |
/*
* Since pinning has no meaning for an efd item, unpinning does
* not either.
*/
STATIC void
xfs_efd_item_unpin(
struct xfs_log_item *lip,
int remove)
{
}
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| Person | Tokens | Prop | Commits | CommitProp |
| christoph hellwig | christoph hellwig | 13 | 100.00% | 3 | 100.00% |
| Total | 13 | 100.00% | 3 | 100.00% |
/*
* There isn't much you can do to push on an efd item. It is simply stuck
* waiting for the log to be flushed to disk.
*/
STATIC uint
xfs_efd_item_push(
struct xfs_log_item *lip,
struct list_head *buffer_list)
{
return XFS_ITEM_PINNED;
}
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| Person | Tokens | Prop | Commits | CommitProp |
| christoph hellwig | christoph hellwig | 19 | 100.00% | 3 | 100.00% |
| Total | 19 | 100.00% | 3 | 100.00% |
/*
* The EFD is either committed or aborted if the transaction is cancelled. If
* the transaction is cancelled, drop our reference to the EFI and free the EFD.
*/
STATIC void
xfs_efd_item_unlock(
struct xfs_log_item *lip)
{
struct xfs_efd_log_item *efdp = EFD_ITEM(lip);
if (lip->li_flags & XFS_LI_ABORTED) {
xfs_efi_release(efdp->efd_efip);
xfs_efd_item_free(efdp);
}
}
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| Person | Tokens | Prop | Commits | CommitProp |
| christoph hellwig | christoph hellwig | 23 | 53.49% | 2 | 66.67% |
| brian foster | brian foster | 20 | 46.51% | 1 | 33.33% |
| Total | 43 | 100.00% | 3 | 100.00% |
/*
* When the efd item is committed to disk, all we need to do is delete our
* reference to our partner efi item and then free ourselves. Since we're
* freeing ourselves we must return -1 to keep the transaction code from further
* referencing this item.
*/
STATIC xfs_lsn_t
xfs_efd_item_committed(
struct xfs_log_item *lip,
xfs_lsn_t lsn)
{
struct xfs_efd_log_item *efdp = EFD_ITEM(lip);
/*
* Drop the EFI reference regardless of whether the EFD has been
* aborted. Once the EFD transaction is constructed, it is the sole
* responsibility of the EFD to release the EFI (even if the EFI is
* aborted due to log I/O error).
*/
xfs_efi_release(efdp->efd_efip);
xfs_efd_item_free(efdp);
return (xfs_lsn_t)-1;
}
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| Total | 44 | 100.00% | 4 | 100.00% |
/*
* The EFD dependency tracking op doesn't do squat. It can't because
* it doesn't know where the free extent is coming from. The dependency
* tracking has to be handled by the "enclosing" metadata object. For
* example, for inodes, the inode is locked throughout the extent freeing
* so the dependency should be recorded there.
*/
STATIC void
xfs_efd_item_committing(
struct xfs_log_item *lip,
xfs_lsn_t lsn)
{
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| christoph hellwig | christoph hellwig | 13 | 100.00% | 2 | 100.00% |
| Total | 13 | 100.00% | 2 | 100.00% |
/*
* This is the ops vector shared by all efd log items.
*/
static const struct xfs_item_ops xfs_efd_item_ops = {
.iop_size = xfs_efd_item_size,
.iop_format = xfs_efd_item_format,
.iop_pin = xfs_efd_item_pin,
.iop_unpin = xfs_efd_item_unpin,
.iop_unlock = xfs_efd_item_unlock,
.iop_committed = xfs_efd_item_committed,
.iop_push = xfs_efd_item_push,
.iop_committing = xfs_efd_item_committing
};
/*
* Allocate and initialize an efd item with the given number of extents.
*/
struct xfs_efd_log_item *
xfs_efd_init(
struct xfs_mount *mp,
struct xfs_efi_log_item *efip,
uint nextents)
{
struct xfs_efd_log_item *efdp;
uint size;
ASSERT(nextents > 0);
if (nextents > XFS_EFD_MAX_FAST_EXTENTS) {
size = (uint)(sizeof(xfs_efd_log_item_t) +
((nextents - 1) * sizeof(xfs_extent_t)));
efdp = kmem_zalloc(size, KM_SLEEP);
} else {
efdp = kmem_zone_zalloc(xfs_efd_zone, KM_SLEEP);
}
xfs_log_item_init(mp, &efdp->efd_item, XFS_LI_EFD, &xfs_efd_item_ops);
efdp->efd_efip = efip;
efdp->efd_format.efd_nextents = nextents;
efdp->efd_format.efd_efi_id = efip->efi_format.efi_id;
return efdp;
}
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| david chinner | david chinner | 3 | 2.26% | 1 | 25.00% |
| Total | 133 | 100.00% | 4 | 100.00% |
/*
* 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;
struct xfs_owner_info oinfo;
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 -EIO;
}
}
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);
xfs_rmap_skip_owner_update(&oinfo);
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, &oinfo);
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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| darrick j. wong | darrick j. wong | 298 | 100.00% | 2 | 100.00% |
| Total | 298 | 100.00% | 2 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| christoph hellwig | christoph hellwig | 895 | 49.31% | 10 | 31.25% |
| timothy shimmin | timothy shimmin | 335 | 18.46% | 1 | 3.12% |
| darrick j. wong | darrick j. wong | 308 | 16.97% | 2 | 6.25% |
| dave chinner | dave chinner | 202 | 11.13% | 8 | 25.00% |
| brian foster | brian foster | 43 | 2.37% | 4 | 12.50% |
| russell cattelan | russell cattelan | 18 | 0.99% | 1 | 3.12% |
| david chinner | david chinner | 11 | 0.61% | 3 | 9.38% |
| nathan scott | nathan scott | 2 | 0.11% | 2 | 6.25% |
| eric sandeen | eric sandeen | 1 | 0.06% | 1 | 3.12% |
| Total | 1815 | 100.00% | 32 | 100.00% |
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