mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-23 13:47:41 +07:00
4f317369d4
Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Ben Myers <bpm@sgi.com>
1826 lines
50 KiB
C
1826 lines
50 KiB
C
/*
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* Copyright (c) 2000-2006 Silicon Graphics, Inc.
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* Copyright (c) 2012 Red Hat, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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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_shared.h"
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#include "xfs_format.h"
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#include "xfs_log_format.h"
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#include "xfs_trans_resv.h"
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#include "xfs_bit.h"
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#include "xfs_sb.h"
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#include "xfs_ag.h"
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#include "xfs_mount.h"
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#include "xfs_da_format.h"
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#include "xfs_inode.h"
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#include "xfs_btree.h"
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#include "xfs_trans.h"
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#include "xfs_extfree_item.h"
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#include "xfs_alloc.h"
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#include "xfs_bmap.h"
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#include "xfs_bmap_util.h"
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#include "xfs_bmap_btree.h"
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#include "xfs_rtalloc.h"
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#include "xfs_error.h"
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#include "xfs_quota.h"
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#include "xfs_trans_space.h"
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#include "xfs_trace.h"
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#include "xfs_icache.h"
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#include "xfs_log.h"
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#include "xfs_dinode.h"
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/* Kernel only BMAP related definitions and functions */
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/*
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* Convert the given file system block to a disk block. We have to treat it
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* differently based on whether the file is a real time file or not, because the
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* bmap code does.
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*/
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xfs_daddr_t
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xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb)
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{
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return (XFS_IS_REALTIME_INODE(ip) ? \
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(xfs_daddr_t)XFS_FSB_TO_BB((ip)->i_mount, (fsb)) : \
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XFS_FSB_TO_DADDR((ip)->i_mount, (fsb)));
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}
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/*
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* Routine to be called at transaction's end by xfs_bmapi, xfs_bunmapi
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* caller. Frees all the extents that need freeing, which must be done
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* last due to locking considerations. We never free any extents in
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* the first transaction.
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*
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* Return 1 if the given transaction was committed and a new one
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* started, and 0 otherwise in the committed parameter.
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*/
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int /* error */
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xfs_bmap_finish(
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xfs_trans_t **tp, /* transaction pointer addr */
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xfs_bmap_free_t *flist, /* i/o: list extents to free */
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int *committed) /* xact committed or not */
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{
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xfs_efd_log_item_t *efd; /* extent free data */
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xfs_efi_log_item_t *efi; /* extent free intention */
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int error; /* error return value */
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xfs_bmap_free_item_t *free; /* free extent item */
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struct xfs_trans_res tres; /* new log reservation */
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xfs_mount_t *mp; /* filesystem mount structure */
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xfs_bmap_free_item_t *next; /* next item on free list */
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xfs_trans_t *ntp; /* new transaction pointer */
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ASSERT((*tp)->t_flags & XFS_TRANS_PERM_LOG_RES);
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if (flist->xbf_count == 0) {
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*committed = 0;
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return 0;
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}
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ntp = *tp;
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efi = xfs_trans_get_efi(ntp, flist->xbf_count);
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for (free = flist->xbf_first; free; free = free->xbfi_next)
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xfs_trans_log_efi_extent(ntp, efi, free->xbfi_startblock,
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free->xbfi_blockcount);
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tres.tr_logres = ntp->t_log_res;
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tres.tr_logcount = ntp->t_log_count;
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tres.tr_logflags = XFS_TRANS_PERM_LOG_RES;
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ntp = xfs_trans_dup(*tp);
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error = xfs_trans_commit(*tp, 0);
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*tp = ntp;
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*committed = 1;
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/*
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* We have a new transaction, so we should return committed=1,
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* even though we're returning an error.
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*/
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if (error)
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return error;
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/*
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* transaction commit worked ok so we can drop the extra ticket
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* reference that we gained in xfs_trans_dup()
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*/
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xfs_log_ticket_put(ntp->t_ticket);
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error = xfs_trans_reserve(ntp, &tres, 0, 0);
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if (error)
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return error;
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efd = xfs_trans_get_efd(ntp, efi, flist->xbf_count);
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for (free = flist->xbf_first; free != NULL; free = next) {
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next = free->xbfi_next;
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if ((error = xfs_free_extent(ntp, free->xbfi_startblock,
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free->xbfi_blockcount))) {
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/*
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* The bmap free list will be cleaned up at a
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* higher level. The EFI will be canceled when
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* this transaction is aborted.
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* Need to force shutdown here to make sure it
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* happens, since this transaction may not be
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* dirty yet.
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*/
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mp = ntp->t_mountp;
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if (!XFS_FORCED_SHUTDOWN(mp))
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xfs_force_shutdown(mp,
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(error == EFSCORRUPTED) ?
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SHUTDOWN_CORRUPT_INCORE :
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SHUTDOWN_META_IO_ERROR);
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return error;
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}
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xfs_trans_log_efd_extent(ntp, efd, free->xbfi_startblock,
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free->xbfi_blockcount);
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xfs_bmap_del_free(flist, NULL, free);
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}
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return 0;
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}
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int
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xfs_bmap_rtalloc(
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struct xfs_bmalloca *ap) /* bmap alloc argument struct */
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{
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xfs_alloctype_t atype = 0; /* type for allocation routines */
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int error; /* error return value */
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xfs_mount_t *mp; /* mount point structure */
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xfs_extlen_t prod = 0; /* product factor for allocators */
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xfs_extlen_t ralen = 0; /* realtime allocation length */
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xfs_extlen_t align; /* minimum allocation alignment */
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xfs_rtblock_t rtb;
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mp = ap->ip->i_mount;
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align = xfs_get_extsz_hint(ap->ip);
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prod = align / mp->m_sb.sb_rextsize;
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error = xfs_bmap_extsize_align(mp, &ap->got, &ap->prev,
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align, 1, ap->eof, 0,
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ap->conv, &ap->offset, &ap->length);
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if (error)
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return error;
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ASSERT(ap->length);
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ASSERT(ap->length % mp->m_sb.sb_rextsize == 0);
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/*
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* If the offset & length are not perfectly aligned
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* then kill prod, it will just get us in trouble.
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*/
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if (do_mod(ap->offset, align) || ap->length % align)
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prod = 1;
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/*
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* Set ralen to be the actual requested length in rtextents.
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*/
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ralen = ap->length / mp->m_sb.sb_rextsize;
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/*
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* If the old value was close enough to MAXEXTLEN that
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* we rounded up to it, cut it back so it's valid again.
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* Note that if it's a really large request (bigger than
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* MAXEXTLEN), we don't hear about that number, and can't
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* adjust the starting point to match it.
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*/
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if (ralen * mp->m_sb.sb_rextsize >= MAXEXTLEN)
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ralen = MAXEXTLEN / mp->m_sb.sb_rextsize;
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/*
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* Lock out other modifications to the RT bitmap inode.
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*/
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xfs_ilock(mp->m_rbmip, XFS_ILOCK_EXCL);
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xfs_trans_ijoin(ap->tp, mp->m_rbmip, XFS_ILOCK_EXCL);
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/*
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* If it's an allocation to an empty file at offset 0,
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* pick an extent that will space things out in the rt area.
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*/
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if (ap->eof && ap->offset == 0) {
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xfs_rtblock_t uninitialized_var(rtx); /* realtime extent no */
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error = xfs_rtpick_extent(mp, ap->tp, ralen, &rtx);
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if (error)
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return error;
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ap->blkno = rtx * mp->m_sb.sb_rextsize;
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} else {
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ap->blkno = 0;
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}
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xfs_bmap_adjacent(ap);
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/*
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* Realtime allocation, done through xfs_rtallocate_extent.
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*/
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atype = ap->blkno == 0 ? XFS_ALLOCTYPE_ANY_AG : XFS_ALLOCTYPE_NEAR_BNO;
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do_div(ap->blkno, mp->m_sb.sb_rextsize);
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rtb = ap->blkno;
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ap->length = ralen;
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if ((error = xfs_rtallocate_extent(ap->tp, ap->blkno, 1, ap->length,
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&ralen, atype, ap->wasdel, prod, &rtb)))
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return error;
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if (rtb == NULLFSBLOCK && prod > 1 &&
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(error = xfs_rtallocate_extent(ap->tp, ap->blkno, 1,
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ap->length, &ralen, atype,
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ap->wasdel, 1, &rtb)))
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return error;
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ap->blkno = rtb;
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if (ap->blkno != NULLFSBLOCK) {
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ap->blkno *= mp->m_sb.sb_rextsize;
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ralen *= mp->m_sb.sb_rextsize;
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ap->length = ralen;
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ap->ip->i_d.di_nblocks += ralen;
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xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE);
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if (ap->wasdel)
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ap->ip->i_delayed_blks -= ralen;
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/*
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* Adjust the disk quota also. This was reserved
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* earlier.
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*/
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xfs_trans_mod_dquot_byino(ap->tp, ap->ip,
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ap->wasdel ? XFS_TRANS_DQ_DELRTBCOUNT :
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XFS_TRANS_DQ_RTBCOUNT, (long) ralen);
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} else {
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ap->length = 0;
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}
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return 0;
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}
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/*
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* Stack switching interfaces for allocation
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*/
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static void
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xfs_bmapi_allocate_worker(
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struct work_struct *work)
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{
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struct xfs_bmalloca *args = container_of(work,
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struct xfs_bmalloca, work);
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unsigned long pflags;
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/* we are in a transaction context here */
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current_set_flags_nested(&pflags, PF_FSTRANS);
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args->result = __xfs_bmapi_allocate(args);
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complete(args->done);
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current_restore_flags_nested(&pflags, PF_FSTRANS);
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}
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/*
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* Some allocation requests often come in with little stack to work on. Push
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* them off to a worker thread so there is lots of stack to use. Otherwise just
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* call directly to avoid the context switch overhead here.
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*/
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int
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xfs_bmapi_allocate(
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struct xfs_bmalloca *args)
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{
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DECLARE_COMPLETION_ONSTACK(done);
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if (!args->stack_switch)
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return __xfs_bmapi_allocate(args);
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args->done = &done;
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INIT_WORK_ONSTACK(&args->work, xfs_bmapi_allocate_worker);
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queue_work(xfs_alloc_wq, &args->work);
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wait_for_completion(&done);
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return args->result;
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}
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/*
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* Check if the endoff is outside the last extent. If so the caller will grow
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* the allocation to a stripe unit boundary. All offsets are considered outside
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* the end of file for an empty fork, so 1 is returned in *eof in that case.
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*/
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int
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xfs_bmap_eof(
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struct xfs_inode *ip,
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xfs_fileoff_t endoff,
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int whichfork,
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int *eof)
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{
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struct xfs_bmbt_irec rec;
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int error;
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error = xfs_bmap_last_extent(NULL, ip, whichfork, &rec, eof);
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if (error || *eof)
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return error;
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*eof = endoff >= rec.br_startoff + rec.br_blockcount;
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return 0;
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}
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/*
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* Extent tree block counting routines.
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*/
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/*
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* Count leaf blocks given a range of extent records.
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*/
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STATIC void
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xfs_bmap_count_leaves(
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xfs_ifork_t *ifp,
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xfs_extnum_t idx,
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int numrecs,
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int *count)
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{
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int b;
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for (b = 0; b < numrecs; b++) {
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xfs_bmbt_rec_host_t *frp = xfs_iext_get_ext(ifp, idx + b);
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*count += xfs_bmbt_get_blockcount(frp);
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}
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}
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/*
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* Count leaf blocks given a range of extent records originally
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* in btree format.
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*/
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STATIC void
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xfs_bmap_disk_count_leaves(
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struct xfs_mount *mp,
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struct xfs_btree_block *block,
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int numrecs,
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int *count)
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{
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int b;
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xfs_bmbt_rec_t *frp;
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for (b = 1; b <= numrecs; b++) {
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frp = XFS_BMBT_REC_ADDR(mp, block, b);
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*count += xfs_bmbt_disk_get_blockcount(frp);
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}
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}
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/*
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* Recursively walks each level of a btree
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* to count total fsblocks in use.
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*/
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STATIC int /* error */
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xfs_bmap_count_tree(
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xfs_mount_t *mp, /* file system mount point */
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xfs_trans_t *tp, /* transaction pointer */
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xfs_ifork_t *ifp, /* inode fork pointer */
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xfs_fsblock_t blockno, /* file system block number */
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int levelin, /* level in btree */
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int *count) /* Count of blocks */
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{
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int error;
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xfs_buf_t *bp, *nbp;
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int level = levelin;
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__be64 *pp;
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xfs_fsblock_t bno = blockno;
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xfs_fsblock_t nextbno;
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struct xfs_btree_block *block, *nextblock;
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int numrecs;
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error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, XFS_BMAP_BTREE_REF,
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&xfs_bmbt_buf_ops);
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if (error)
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return error;
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*count += 1;
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block = XFS_BUF_TO_BLOCK(bp);
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if (--level) {
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/* Not at node above leaves, count this level of nodes */
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nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib);
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while (nextbno != NULLFSBLOCK) {
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error = xfs_btree_read_bufl(mp, tp, nextbno, 0, &nbp,
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XFS_BMAP_BTREE_REF,
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&xfs_bmbt_buf_ops);
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if (error)
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return error;
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*count += 1;
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nextblock = XFS_BUF_TO_BLOCK(nbp);
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nextbno = be64_to_cpu(nextblock->bb_u.l.bb_rightsib);
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xfs_trans_brelse(tp, nbp);
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}
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/* Dive to the next level */
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pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]);
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bno = be64_to_cpu(*pp);
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if (unlikely((error =
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xfs_bmap_count_tree(mp, tp, ifp, bno, level, count)) < 0)) {
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xfs_trans_brelse(tp, bp);
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XFS_ERROR_REPORT("xfs_bmap_count_tree(1)",
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XFS_ERRLEVEL_LOW, mp);
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return XFS_ERROR(EFSCORRUPTED);
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}
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xfs_trans_brelse(tp, bp);
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} else {
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/* count all level 1 nodes and their leaves */
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for (;;) {
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nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib);
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numrecs = be16_to_cpu(block->bb_numrecs);
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xfs_bmap_disk_count_leaves(mp, block, numrecs, count);
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xfs_trans_brelse(tp, bp);
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if (nextbno == NULLFSBLOCK)
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break;
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bno = nextbno;
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error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
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XFS_BMAP_BTREE_REF,
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&xfs_bmbt_buf_ops);
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if (error)
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return error;
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*count += 1;
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block = XFS_BUF_TO_BLOCK(bp);
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}
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}
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return 0;
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}
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|
|
/*
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|
* Count fsblocks of the given fork.
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|
*/
|
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int /* error */
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xfs_bmap_count_blocks(
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xfs_trans_t *tp, /* transaction pointer */
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xfs_inode_t *ip, /* incore inode */
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int whichfork, /* data or attr fork */
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int *count) /* out: count of blocks */
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{
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struct xfs_btree_block *block; /* current btree block */
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xfs_fsblock_t bno; /* block # of "block" */
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xfs_ifork_t *ifp; /* fork structure */
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int level; /* btree level, for checking */
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xfs_mount_t *mp; /* file system mount structure */
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__be64 *pp; /* pointer to block address */
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bno = NULLFSBLOCK;
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mp = ip->i_mount;
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ifp = XFS_IFORK_PTR(ip, whichfork);
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if ( XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS ) {
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xfs_bmap_count_leaves(ifp, 0,
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ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t),
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count);
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return 0;
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}
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|
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/*
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* Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out.
|
|
*/
|
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block = ifp->if_broot;
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level = be16_to_cpu(block->bb_level);
|
|
ASSERT(level > 0);
|
|
pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes);
|
|
bno = be64_to_cpu(*pp);
|
|
ASSERT(bno != NULLDFSBNO);
|
|
ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount);
|
|
ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks);
|
|
|
|
if (unlikely(xfs_bmap_count_tree(mp, tp, ifp, bno, level, count) < 0)) {
|
|
XFS_ERROR_REPORT("xfs_bmap_count_blocks(2)", XFS_ERRLEVEL_LOW,
|
|
mp);
|
|
return XFS_ERROR(EFSCORRUPTED);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* returns 1 for success, 0 if we failed to map the extent.
|
|
*/
|
|
STATIC int
|
|
xfs_getbmapx_fix_eof_hole(
|
|
xfs_inode_t *ip, /* xfs incore inode pointer */
|
|
struct getbmapx *out, /* output structure */
|
|
int prealloced, /* this is a file with
|
|
* preallocated data space */
|
|
__int64_t end, /* last block requested */
|
|
xfs_fsblock_t startblock)
|
|
{
|
|
__int64_t fixlen;
|
|
xfs_mount_t *mp; /* file system mount point */
|
|
xfs_ifork_t *ifp; /* inode fork pointer */
|
|
xfs_extnum_t lastx; /* last extent pointer */
|
|
xfs_fileoff_t fileblock;
|
|
|
|
if (startblock == HOLESTARTBLOCK) {
|
|
mp = ip->i_mount;
|
|
out->bmv_block = -1;
|
|
fixlen = XFS_FSB_TO_BB(mp, XFS_B_TO_FSB(mp, XFS_ISIZE(ip)));
|
|
fixlen -= out->bmv_offset;
|
|
if (prealloced && out->bmv_offset + out->bmv_length == end) {
|
|
/* Came to hole at EOF. Trim it. */
|
|
if (fixlen <= 0)
|
|
return 0;
|
|
out->bmv_length = fixlen;
|
|
}
|
|
} else {
|
|
if (startblock == DELAYSTARTBLOCK)
|
|
out->bmv_block = -2;
|
|
else
|
|
out->bmv_block = xfs_fsb_to_db(ip, startblock);
|
|
fileblock = XFS_BB_TO_FSB(ip->i_mount, out->bmv_offset);
|
|
ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
|
|
if (xfs_iext_bno_to_ext(ifp, fileblock, &lastx) &&
|
|
(lastx == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))-1))
|
|
out->bmv_oflags |= BMV_OF_LAST;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Get inode's extents as described in bmv, and format for output.
|
|
* Calls formatter to fill the user's buffer until all extents
|
|
* are mapped, until the passed-in bmv->bmv_count slots have
|
|
* been filled, or until the formatter short-circuits the loop,
|
|
* if it is tracking filled-in extents on its own.
|
|
*/
|
|
int /* error code */
|
|
xfs_getbmap(
|
|
xfs_inode_t *ip,
|
|
struct getbmapx *bmv, /* user bmap structure */
|
|
xfs_bmap_format_t formatter, /* format to user */
|
|
void *arg) /* formatter arg */
|
|
{
|
|
__int64_t bmvend; /* last block requested */
|
|
int error = 0; /* return value */
|
|
__int64_t fixlen; /* length for -1 case */
|
|
int i; /* extent number */
|
|
int lock; /* lock state */
|
|
xfs_bmbt_irec_t *map; /* buffer for user's data */
|
|
xfs_mount_t *mp; /* file system mount point */
|
|
int nex; /* # of user extents can do */
|
|
int nexleft; /* # of user extents left */
|
|
int subnex; /* # of bmapi's can do */
|
|
int nmap; /* number of map entries */
|
|
struct getbmapx *out; /* output structure */
|
|
int whichfork; /* data or attr fork */
|
|
int prealloced; /* this is a file with
|
|
* preallocated data space */
|
|
int iflags; /* interface flags */
|
|
int bmapi_flags; /* flags for xfs_bmapi */
|
|
int cur_ext = 0;
|
|
|
|
mp = ip->i_mount;
|
|
iflags = bmv->bmv_iflags;
|
|
whichfork = iflags & BMV_IF_ATTRFORK ? XFS_ATTR_FORK : XFS_DATA_FORK;
|
|
|
|
if (whichfork == XFS_ATTR_FORK) {
|
|
if (XFS_IFORK_Q(ip)) {
|
|
if (ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS &&
|
|
ip->i_d.di_aformat != XFS_DINODE_FMT_BTREE &&
|
|
ip->i_d.di_aformat != XFS_DINODE_FMT_LOCAL)
|
|
return XFS_ERROR(EINVAL);
|
|
} else if (unlikely(
|
|
ip->i_d.di_aformat != 0 &&
|
|
ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS)) {
|
|
XFS_ERROR_REPORT("xfs_getbmap", XFS_ERRLEVEL_LOW,
|
|
ip->i_mount);
|
|
return XFS_ERROR(EFSCORRUPTED);
|
|
}
|
|
|
|
prealloced = 0;
|
|
fixlen = 1LL << 32;
|
|
} else {
|
|
if (ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS &&
|
|
ip->i_d.di_format != XFS_DINODE_FMT_BTREE &&
|
|
ip->i_d.di_format != XFS_DINODE_FMT_LOCAL)
|
|
return XFS_ERROR(EINVAL);
|
|
|
|
if (xfs_get_extsz_hint(ip) ||
|
|
ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC|XFS_DIFLAG_APPEND)){
|
|
prealloced = 1;
|
|
fixlen = mp->m_super->s_maxbytes;
|
|
} else {
|
|
prealloced = 0;
|
|
fixlen = XFS_ISIZE(ip);
|
|
}
|
|
}
|
|
|
|
if (bmv->bmv_length == -1) {
|
|
fixlen = XFS_FSB_TO_BB(mp, XFS_B_TO_FSB(mp, fixlen));
|
|
bmv->bmv_length =
|
|
max_t(__int64_t, fixlen - bmv->bmv_offset, 0);
|
|
} else if (bmv->bmv_length == 0) {
|
|
bmv->bmv_entries = 0;
|
|
return 0;
|
|
} else if (bmv->bmv_length < 0) {
|
|
return XFS_ERROR(EINVAL);
|
|
}
|
|
|
|
nex = bmv->bmv_count - 1;
|
|
if (nex <= 0)
|
|
return XFS_ERROR(EINVAL);
|
|
bmvend = bmv->bmv_offset + bmv->bmv_length;
|
|
|
|
|
|
if (bmv->bmv_count > ULONG_MAX / sizeof(struct getbmapx))
|
|
return XFS_ERROR(ENOMEM);
|
|
out = kmem_zalloc_large(bmv->bmv_count * sizeof(struct getbmapx), 0);
|
|
if (!out)
|
|
return XFS_ERROR(ENOMEM);
|
|
|
|
xfs_ilock(ip, XFS_IOLOCK_SHARED);
|
|
if (whichfork == XFS_DATA_FORK) {
|
|
if (!(iflags & BMV_IF_DELALLOC) &&
|
|
(ip->i_delayed_blks || XFS_ISIZE(ip) > ip->i_d.di_size)) {
|
|
error = -filemap_write_and_wait(VFS_I(ip)->i_mapping);
|
|
if (error)
|
|
goto out_unlock_iolock;
|
|
|
|
/*
|
|
* Even after flushing the inode, there can still be
|
|
* delalloc blocks on the inode beyond EOF due to
|
|
* speculative preallocation. These are not removed
|
|
* until the release function is called or the inode
|
|
* is inactivated. Hence we cannot assert here that
|
|
* ip->i_delayed_blks == 0.
|
|
*/
|
|
}
|
|
|
|
lock = xfs_ilock_data_map_shared(ip);
|
|
} else {
|
|
lock = xfs_ilock_attr_map_shared(ip);
|
|
}
|
|
|
|
/*
|
|
* Don't let nex be bigger than the number of extents
|
|
* we can have assuming alternating holes and real extents.
|
|
*/
|
|
if (nex > XFS_IFORK_NEXTENTS(ip, whichfork) * 2 + 1)
|
|
nex = XFS_IFORK_NEXTENTS(ip, whichfork) * 2 + 1;
|
|
|
|
bmapi_flags = xfs_bmapi_aflag(whichfork);
|
|
if (!(iflags & BMV_IF_PREALLOC))
|
|
bmapi_flags |= XFS_BMAPI_IGSTATE;
|
|
|
|
/*
|
|
* Allocate enough space to handle "subnex" maps at a time.
|
|
*/
|
|
error = ENOMEM;
|
|
subnex = 16;
|
|
map = kmem_alloc(subnex * sizeof(*map), KM_MAYFAIL | KM_NOFS);
|
|
if (!map)
|
|
goto out_unlock_ilock;
|
|
|
|
bmv->bmv_entries = 0;
|
|
|
|
if (XFS_IFORK_NEXTENTS(ip, whichfork) == 0 &&
|
|
(whichfork == XFS_ATTR_FORK || !(iflags & BMV_IF_DELALLOC))) {
|
|
error = 0;
|
|
goto out_free_map;
|
|
}
|
|
|
|
nexleft = nex;
|
|
|
|
do {
|
|
nmap = (nexleft > subnex) ? subnex : nexleft;
|
|
error = xfs_bmapi_read(ip, XFS_BB_TO_FSBT(mp, bmv->bmv_offset),
|
|
XFS_BB_TO_FSB(mp, bmv->bmv_length),
|
|
map, &nmap, bmapi_flags);
|
|
if (error)
|
|
goto out_free_map;
|
|
ASSERT(nmap <= subnex);
|
|
|
|
for (i = 0; i < nmap && nexleft && bmv->bmv_length; i++) {
|
|
out[cur_ext].bmv_oflags = 0;
|
|
if (map[i].br_state == XFS_EXT_UNWRITTEN)
|
|
out[cur_ext].bmv_oflags |= BMV_OF_PREALLOC;
|
|
else if (map[i].br_startblock == DELAYSTARTBLOCK)
|
|
out[cur_ext].bmv_oflags |= BMV_OF_DELALLOC;
|
|
out[cur_ext].bmv_offset =
|
|
XFS_FSB_TO_BB(mp, map[i].br_startoff);
|
|
out[cur_ext].bmv_length =
|
|
XFS_FSB_TO_BB(mp, map[i].br_blockcount);
|
|
out[cur_ext].bmv_unused1 = 0;
|
|
out[cur_ext].bmv_unused2 = 0;
|
|
|
|
/*
|
|
* delayed allocation extents that start beyond EOF can
|
|
* occur due to speculative EOF allocation when the
|
|
* delalloc extent is larger than the largest freespace
|
|
* extent at conversion time. These extents cannot be
|
|
* converted by data writeback, so can exist here even
|
|
* if we are not supposed to be finding delalloc
|
|
* extents.
|
|
*/
|
|
if (map[i].br_startblock == DELAYSTARTBLOCK &&
|
|
map[i].br_startoff <= XFS_B_TO_FSB(mp, XFS_ISIZE(ip)))
|
|
ASSERT((iflags & BMV_IF_DELALLOC) != 0);
|
|
|
|
if (map[i].br_startblock == HOLESTARTBLOCK &&
|
|
whichfork == XFS_ATTR_FORK) {
|
|
/* came to the end of attribute fork */
|
|
out[cur_ext].bmv_oflags |= BMV_OF_LAST;
|
|
goto out_free_map;
|
|
}
|
|
|
|
if (!xfs_getbmapx_fix_eof_hole(ip, &out[cur_ext],
|
|
prealloced, bmvend,
|
|
map[i].br_startblock))
|
|
goto out_free_map;
|
|
|
|
bmv->bmv_offset =
|
|
out[cur_ext].bmv_offset +
|
|
out[cur_ext].bmv_length;
|
|
bmv->bmv_length =
|
|
max_t(__int64_t, 0, bmvend - bmv->bmv_offset);
|
|
|
|
/*
|
|
* In case we don't want to return the hole,
|
|
* don't increase cur_ext so that we can reuse
|
|
* it in the next loop.
|
|
*/
|
|
if ((iflags & BMV_IF_NO_HOLES) &&
|
|
map[i].br_startblock == HOLESTARTBLOCK) {
|
|
memset(&out[cur_ext], 0, sizeof(out[cur_ext]));
|
|
continue;
|
|
}
|
|
|
|
nexleft--;
|
|
bmv->bmv_entries++;
|
|
cur_ext++;
|
|
}
|
|
} while (nmap && nexleft && bmv->bmv_length);
|
|
|
|
out_free_map:
|
|
kmem_free(map);
|
|
out_unlock_ilock:
|
|
xfs_iunlock(ip, lock);
|
|
out_unlock_iolock:
|
|
xfs_iunlock(ip, XFS_IOLOCK_SHARED);
|
|
|
|
for (i = 0; i < cur_ext; i++) {
|
|
int full = 0; /* user array is full */
|
|
|
|
/* format results & advance arg */
|
|
error = formatter(&arg, &out[i], &full);
|
|
if (error || full)
|
|
break;
|
|
}
|
|
|
|
kmem_free(out);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* dead simple method of punching delalyed allocation blocks from a range in
|
|
* the inode. Walks a block at a time so will be slow, but is only executed in
|
|
* rare error cases so the overhead is not critical. This will always punch out
|
|
* both the start and end blocks, even if the ranges only partially overlap
|
|
* them, so it is up to the caller to ensure that partial blocks are not
|
|
* passed in.
|
|
*/
|
|
int
|
|
xfs_bmap_punch_delalloc_range(
|
|
struct xfs_inode *ip,
|
|
xfs_fileoff_t start_fsb,
|
|
xfs_fileoff_t length)
|
|
{
|
|
xfs_fileoff_t remaining = length;
|
|
int error = 0;
|
|
|
|
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
|
|
|
|
do {
|
|
int done;
|
|
xfs_bmbt_irec_t imap;
|
|
int nimaps = 1;
|
|
xfs_fsblock_t firstblock;
|
|
xfs_bmap_free_t flist;
|
|
|
|
/*
|
|
* Map the range first and check that it is a delalloc extent
|
|
* before trying to unmap the range. Otherwise we will be
|
|
* trying to remove a real extent (which requires a
|
|
* transaction) or a hole, which is probably a bad idea...
|
|
*/
|
|
error = xfs_bmapi_read(ip, start_fsb, 1, &imap, &nimaps,
|
|
XFS_BMAPI_ENTIRE);
|
|
|
|
if (error) {
|
|
/* something screwed, just bail */
|
|
if (!XFS_FORCED_SHUTDOWN(ip->i_mount)) {
|
|
xfs_alert(ip->i_mount,
|
|
"Failed delalloc mapping lookup ino %lld fsb %lld.",
|
|
ip->i_ino, start_fsb);
|
|
}
|
|
break;
|
|
}
|
|
if (!nimaps) {
|
|
/* nothing there */
|
|
goto next_block;
|
|
}
|
|
if (imap.br_startblock != DELAYSTARTBLOCK) {
|
|
/* been converted, ignore */
|
|
goto next_block;
|
|
}
|
|
WARN_ON(imap.br_blockcount == 0);
|
|
|
|
/*
|
|
* Note: while we initialise the firstblock/flist pair, they
|
|
* should never be used because blocks should never be
|
|
* allocated or freed for a delalloc extent and hence we need
|
|
* don't cancel or finish them after the xfs_bunmapi() call.
|
|
*/
|
|
xfs_bmap_init(&flist, &firstblock);
|
|
error = xfs_bunmapi(NULL, ip, start_fsb, 1, 0, 1, &firstblock,
|
|
&flist, &done);
|
|
if (error)
|
|
break;
|
|
|
|
ASSERT(!flist.xbf_count && !flist.xbf_first);
|
|
next_block:
|
|
start_fsb++;
|
|
remaining--;
|
|
} while(remaining > 0);
|
|
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Test whether it is appropriate to check an inode for and free post EOF
|
|
* blocks. The 'force' parameter determines whether we should also consider
|
|
* regular files that are marked preallocated or append-only.
|
|
*/
|
|
bool
|
|
xfs_can_free_eofblocks(struct xfs_inode *ip, bool force)
|
|
{
|
|
/* prealloc/delalloc exists only on regular files */
|
|
if (!S_ISREG(ip->i_d.di_mode))
|
|
return false;
|
|
|
|
/*
|
|
* Zero sized files with no cached pages and delalloc blocks will not
|
|
* have speculative prealloc/delalloc blocks to remove.
|
|
*/
|
|
if (VFS_I(ip)->i_size == 0 &&
|
|
VN_CACHED(VFS_I(ip)) == 0 &&
|
|
ip->i_delayed_blks == 0)
|
|
return false;
|
|
|
|
/* If we haven't read in the extent list, then don't do it now. */
|
|
if (!(ip->i_df.if_flags & XFS_IFEXTENTS))
|
|
return false;
|
|
|
|
/*
|
|
* Do not free real preallocated or append-only files unless the file
|
|
* has delalloc blocks and we are forced to remove them.
|
|
*/
|
|
if (ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND))
|
|
if (!force || ip->i_delayed_blks == 0)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* This is called by xfs_inactive to free any blocks beyond eof
|
|
* when the link count isn't zero and by xfs_dm_punch_hole() when
|
|
* punching a hole to EOF.
|
|
*/
|
|
int
|
|
xfs_free_eofblocks(
|
|
xfs_mount_t *mp,
|
|
xfs_inode_t *ip,
|
|
bool need_iolock)
|
|
{
|
|
xfs_trans_t *tp;
|
|
int error;
|
|
xfs_fileoff_t end_fsb;
|
|
xfs_fileoff_t last_fsb;
|
|
xfs_filblks_t map_len;
|
|
int nimaps;
|
|
xfs_bmbt_irec_t imap;
|
|
|
|
/*
|
|
* Figure out if there are any blocks beyond the end
|
|
* of the file. If not, then there is nothing to do.
|
|
*/
|
|
end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_ISIZE(ip));
|
|
last_fsb = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes);
|
|
if (last_fsb <= end_fsb)
|
|
return 0;
|
|
map_len = last_fsb - end_fsb;
|
|
|
|
nimaps = 1;
|
|
xfs_ilock(ip, XFS_ILOCK_SHARED);
|
|
error = xfs_bmapi_read(ip, end_fsb, map_len, &imap, &nimaps, 0);
|
|
xfs_iunlock(ip, XFS_ILOCK_SHARED);
|
|
|
|
if (!error && (nimaps != 0) &&
|
|
(imap.br_startblock != HOLESTARTBLOCK ||
|
|
ip->i_delayed_blks)) {
|
|
/*
|
|
* Attach the dquots to the inode up front.
|
|
*/
|
|
error = xfs_qm_dqattach(ip, 0);
|
|
if (error)
|
|
return error;
|
|
|
|
/*
|
|
* There are blocks after the end of file.
|
|
* Free them up now by truncating the file to
|
|
* its current size.
|
|
*/
|
|
tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE);
|
|
|
|
if (need_iolock) {
|
|
if (!xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL)) {
|
|
xfs_trans_cancel(tp, 0);
|
|
return EAGAIN;
|
|
}
|
|
}
|
|
|
|
error = xfs_trans_reserve(tp, &M_RES(mp)->tr_itruncate, 0, 0);
|
|
if (error) {
|
|
ASSERT(XFS_FORCED_SHUTDOWN(mp));
|
|
xfs_trans_cancel(tp, 0);
|
|
if (need_iolock)
|
|
xfs_iunlock(ip, XFS_IOLOCK_EXCL);
|
|
return error;
|
|
}
|
|
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
xfs_trans_ijoin(tp, ip, 0);
|
|
|
|
/*
|
|
* Do not update the on-disk file size. If we update the
|
|
* on-disk file size and then the system crashes before the
|
|
* contents of the file are flushed to disk then the files
|
|
* may be full of holes (ie NULL files bug).
|
|
*/
|
|
error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK,
|
|
XFS_ISIZE(ip));
|
|
if (error) {
|
|
/*
|
|
* If we get an error at this point we simply don't
|
|
* bother truncating the file.
|
|
*/
|
|
xfs_trans_cancel(tp,
|
|
(XFS_TRANS_RELEASE_LOG_RES |
|
|
XFS_TRANS_ABORT));
|
|
} else {
|
|
error = xfs_trans_commit(tp,
|
|
XFS_TRANS_RELEASE_LOG_RES);
|
|
if (!error)
|
|
xfs_inode_clear_eofblocks_tag(ip);
|
|
}
|
|
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
if (need_iolock)
|
|
xfs_iunlock(ip, XFS_IOLOCK_EXCL);
|
|
}
|
|
return error;
|
|
}
|
|
|
|
int
|
|
xfs_alloc_file_space(
|
|
struct xfs_inode *ip,
|
|
xfs_off_t offset,
|
|
xfs_off_t len,
|
|
int alloc_type)
|
|
{
|
|
xfs_mount_t *mp = ip->i_mount;
|
|
xfs_off_t count;
|
|
xfs_filblks_t allocated_fsb;
|
|
xfs_filblks_t allocatesize_fsb;
|
|
xfs_extlen_t extsz, temp;
|
|
xfs_fileoff_t startoffset_fsb;
|
|
xfs_fsblock_t firstfsb;
|
|
int nimaps;
|
|
int quota_flag;
|
|
int rt;
|
|
xfs_trans_t *tp;
|
|
xfs_bmbt_irec_t imaps[1], *imapp;
|
|
xfs_bmap_free_t free_list;
|
|
uint qblocks, resblks, resrtextents;
|
|
int committed;
|
|
int error;
|
|
|
|
trace_xfs_alloc_file_space(ip);
|
|
|
|
if (XFS_FORCED_SHUTDOWN(mp))
|
|
return XFS_ERROR(EIO);
|
|
|
|
error = xfs_qm_dqattach(ip, 0);
|
|
if (error)
|
|
return error;
|
|
|
|
if (len <= 0)
|
|
return XFS_ERROR(EINVAL);
|
|
|
|
rt = XFS_IS_REALTIME_INODE(ip);
|
|
extsz = xfs_get_extsz_hint(ip);
|
|
|
|
count = len;
|
|
imapp = &imaps[0];
|
|
nimaps = 1;
|
|
startoffset_fsb = XFS_B_TO_FSBT(mp, offset);
|
|
allocatesize_fsb = XFS_B_TO_FSB(mp, count);
|
|
|
|
/*
|
|
* Allocate file space until done or until there is an error
|
|
*/
|
|
while (allocatesize_fsb && !error) {
|
|
xfs_fileoff_t s, e;
|
|
|
|
/*
|
|
* Determine space reservations for data/realtime.
|
|
*/
|
|
if (unlikely(extsz)) {
|
|
s = startoffset_fsb;
|
|
do_div(s, extsz);
|
|
s *= extsz;
|
|
e = startoffset_fsb + allocatesize_fsb;
|
|
if ((temp = do_mod(startoffset_fsb, extsz)))
|
|
e += temp;
|
|
if ((temp = do_mod(e, extsz)))
|
|
e += extsz - temp;
|
|
} else {
|
|
s = 0;
|
|
e = allocatesize_fsb;
|
|
}
|
|
|
|
/*
|
|
* The transaction reservation is limited to a 32-bit block
|
|
* count, hence we need to limit the number of blocks we are
|
|
* trying to reserve to avoid an overflow. We can't allocate
|
|
* more than @nimaps extents, and an extent is limited on disk
|
|
* to MAXEXTLEN (21 bits), so use that to enforce the limit.
|
|
*/
|
|
resblks = min_t(xfs_fileoff_t, (e - s), (MAXEXTLEN * nimaps));
|
|
if (unlikely(rt)) {
|
|
resrtextents = qblocks = resblks;
|
|
resrtextents /= mp->m_sb.sb_rextsize;
|
|
resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0);
|
|
quota_flag = XFS_QMOPT_RES_RTBLKS;
|
|
} else {
|
|
resrtextents = 0;
|
|
resblks = qblocks = XFS_DIOSTRAT_SPACE_RES(mp, resblks);
|
|
quota_flag = XFS_QMOPT_RES_REGBLKS;
|
|
}
|
|
|
|
/*
|
|
* Allocate and setup the transaction.
|
|
*/
|
|
tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT);
|
|
error = xfs_trans_reserve(tp, &M_RES(mp)->tr_write,
|
|
resblks, resrtextents);
|
|
/*
|
|
* Check for running out of space
|
|
*/
|
|
if (error) {
|
|
/*
|
|
* Free the transaction structure.
|
|
*/
|
|
ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp));
|
|
xfs_trans_cancel(tp, 0);
|
|
break;
|
|
}
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
error = xfs_trans_reserve_quota_nblks(tp, ip, qblocks,
|
|
0, quota_flag);
|
|
if (error)
|
|
goto error1;
|
|
|
|
xfs_trans_ijoin(tp, ip, 0);
|
|
|
|
xfs_bmap_init(&free_list, &firstfsb);
|
|
error = xfs_bmapi_write(tp, ip, startoffset_fsb,
|
|
allocatesize_fsb, alloc_type, &firstfsb,
|
|
0, imapp, &nimaps, &free_list);
|
|
if (error) {
|
|
goto error0;
|
|
}
|
|
|
|
/*
|
|
* Complete the transaction
|
|
*/
|
|
error = xfs_bmap_finish(&tp, &free_list, &committed);
|
|
if (error) {
|
|
goto error0;
|
|
}
|
|
|
|
error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
if (error) {
|
|
break;
|
|
}
|
|
|
|
allocated_fsb = imapp->br_blockcount;
|
|
|
|
if (nimaps == 0) {
|
|
error = XFS_ERROR(ENOSPC);
|
|
break;
|
|
}
|
|
|
|
startoffset_fsb += allocated_fsb;
|
|
allocatesize_fsb -= allocated_fsb;
|
|
}
|
|
|
|
return error;
|
|
|
|
error0: /* Cancel bmap, unlock inode, unreserve quota blocks, cancel trans */
|
|
xfs_bmap_cancel(&free_list);
|
|
xfs_trans_unreserve_quota_nblks(tp, ip, (long)qblocks, 0, quota_flag);
|
|
|
|
error1: /* Just cancel transaction */
|
|
xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Zero file bytes between startoff and endoff inclusive.
|
|
* The iolock is held exclusive and no blocks are buffered.
|
|
*
|
|
* This function is used by xfs_free_file_space() to zero
|
|
* partial blocks when the range to free is not block aligned.
|
|
* When unreserving space with boundaries that are not block
|
|
* aligned we round up the start and round down the end
|
|
* boundaries and then use this function to zero the parts of
|
|
* the blocks that got dropped during the rounding.
|
|
*/
|
|
STATIC int
|
|
xfs_zero_remaining_bytes(
|
|
xfs_inode_t *ip,
|
|
xfs_off_t startoff,
|
|
xfs_off_t endoff)
|
|
{
|
|
xfs_bmbt_irec_t imap;
|
|
xfs_fileoff_t offset_fsb;
|
|
xfs_off_t lastoffset;
|
|
xfs_off_t offset;
|
|
xfs_buf_t *bp;
|
|
xfs_mount_t *mp = ip->i_mount;
|
|
int nimap;
|
|
int error = 0;
|
|
|
|
/*
|
|
* Avoid doing I/O beyond eof - it's not necessary
|
|
* since nothing can read beyond eof. The space will
|
|
* be zeroed when the file is extended anyway.
|
|
*/
|
|
if (startoff >= XFS_ISIZE(ip))
|
|
return 0;
|
|
|
|
if (endoff > XFS_ISIZE(ip))
|
|
endoff = XFS_ISIZE(ip);
|
|
|
|
bp = xfs_buf_get_uncached(XFS_IS_REALTIME_INODE(ip) ?
|
|
mp->m_rtdev_targp : mp->m_ddev_targp,
|
|
BTOBB(mp->m_sb.sb_blocksize), 0);
|
|
if (!bp)
|
|
return XFS_ERROR(ENOMEM);
|
|
|
|
xfs_buf_unlock(bp);
|
|
|
|
for (offset = startoff; offset <= endoff; offset = lastoffset + 1) {
|
|
uint lock_mode;
|
|
|
|
offset_fsb = XFS_B_TO_FSBT(mp, offset);
|
|
nimap = 1;
|
|
|
|
lock_mode = xfs_ilock_data_map_shared(ip);
|
|
error = xfs_bmapi_read(ip, offset_fsb, 1, &imap, &nimap, 0);
|
|
xfs_iunlock(ip, lock_mode);
|
|
|
|
if (error || nimap < 1)
|
|
break;
|
|
ASSERT(imap.br_blockcount >= 1);
|
|
ASSERT(imap.br_startoff == offset_fsb);
|
|
lastoffset = XFS_FSB_TO_B(mp, imap.br_startoff + 1) - 1;
|
|
if (lastoffset > endoff)
|
|
lastoffset = endoff;
|
|
if (imap.br_startblock == HOLESTARTBLOCK)
|
|
continue;
|
|
ASSERT(imap.br_startblock != DELAYSTARTBLOCK);
|
|
if (imap.br_state == XFS_EXT_UNWRITTEN)
|
|
continue;
|
|
XFS_BUF_UNDONE(bp);
|
|
XFS_BUF_UNWRITE(bp);
|
|
XFS_BUF_READ(bp);
|
|
XFS_BUF_SET_ADDR(bp, xfs_fsb_to_db(ip, imap.br_startblock));
|
|
xfsbdstrat(mp, bp);
|
|
error = xfs_buf_iowait(bp);
|
|
if (error) {
|
|
xfs_buf_ioerror_alert(bp,
|
|
"xfs_zero_remaining_bytes(read)");
|
|
break;
|
|
}
|
|
memset(bp->b_addr +
|
|
(offset - XFS_FSB_TO_B(mp, imap.br_startoff)),
|
|
0, lastoffset - offset + 1);
|
|
XFS_BUF_UNDONE(bp);
|
|
XFS_BUF_UNREAD(bp);
|
|
XFS_BUF_WRITE(bp);
|
|
xfsbdstrat(mp, bp);
|
|
error = xfs_buf_iowait(bp);
|
|
if (error) {
|
|
xfs_buf_ioerror_alert(bp,
|
|
"xfs_zero_remaining_bytes(write)");
|
|
break;
|
|
}
|
|
}
|
|
xfs_buf_free(bp);
|
|
return error;
|
|
}
|
|
|
|
int
|
|
xfs_free_file_space(
|
|
struct xfs_inode *ip,
|
|
xfs_off_t offset,
|
|
xfs_off_t len)
|
|
{
|
|
int committed;
|
|
int done;
|
|
xfs_fileoff_t endoffset_fsb;
|
|
int error;
|
|
xfs_fsblock_t firstfsb;
|
|
xfs_bmap_free_t free_list;
|
|
xfs_bmbt_irec_t imap;
|
|
xfs_off_t ioffset;
|
|
xfs_extlen_t mod=0;
|
|
xfs_mount_t *mp;
|
|
int nimap;
|
|
uint resblks;
|
|
xfs_off_t rounding;
|
|
int rt;
|
|
xfs_fileoff_t startoffset_fsb;
|
|
xfs_trans_t *tp;
|
|
|
|
mp = ip->i_mount;
|
|
|
|
trace_xfs_free_file_space(ip);
|
|
|
|
error = xfs_qm_dqattach(ip, 0);
|
|
if (error)
|
|
return error;
|
|
|
|
error = 0;
|
|
if (len <= 0) /* if nothing being freed */
|
|
return error;
|
|
rt = XFS_IS_REALTIME_INODE(ip);
|
|
startoffset_fsb = XFS_B_TO_FSB(mp, offset);
|
|
endoffset_fsb = XFS_B_TO_FSBT(mp, offset + len);
|
|
|
|
/* wait for the completion of any pending DIOs */
|
|
inode_dio_wait(VFS_I(ip));
|
|
|
|
rounding = max_t(xfs_off_t, 1 << mp->m_sb.sb_blocklog, PAGE_CACHE_SIZE);
|
|
ioffset = offset & ~(rounding - 1);
|
|
error = -filemap_write_and_wait_range(VFS_I(ip)->i_mapping,
|
|
ioffset, -1);
|
|
if (error)
|
|
goto out;
|
|
truncate_pagecache_range(VFS_I(ip), ioffset, -1);
|
|
|
|
/*
|
|
* Need to zero the stuff we're not freeing, on disk.
|
|
* If it's a realtime file & can't use unwritten extents then we
|
|
* actually need to zero the extent edges. Otherwise xfs_bunmapi
|
|
* will take care of it for us.
|
|
*/
|
|
if (rt && !xfs_sb_version_hasextflgbit(&mp->m_sb)) {
|
|
nimap = 1;
|
|
error = xfs_bmapi_read(ip, startoffset_fsb, 1,
|
|
&imap, &nimap, 0);
|
|
if (error)
|
|
goto out;
|
|
ASSERT(nimap == 0 || nimap == 1);
|
|
if (nimap && imap.br_startblock != HOLESTARTBLOCK) {
|
|
xfs_daddr_t block;
|
|
|
|
ASSERT(imap.br_startblock != DELAYSTARTBLOCK);
|
|
block = imap.br_startblock;
|
|
mod = do_div(block, mp->m_sb.sb_rextsize);
|
|
if (mod)
|
|
startoffset_fsb += mp->m_sb.sb_rextsize - mod;
|
|
}
|
|
nimap = 1;
|
|
error = xfs_bmapi_read(ip, endoffset_fsb - 1, 1,
|
|
&imap, &nimap, 0);
|
|
if (error)
|
|
goto out;
|
|
ASSERT(nimap == 0 || nimap == 1);
|
|
if (nimap && imap.br_startblock != HOLESTARTBLOCK) {
|
|
ASSERT(imap.br_startblock != DELAYSTARTBLOCK);
|
|
mod++;
|
|
if (mod && (mod != mp->m_sb.sb_rextsize))
|
|
endoffset_fsb -= mod;
|
|
}
|
|
}
|
|
if ((done = (endoffset_fsb <= startoffset_fsb)))
|
|
/*
|
|
* One contiguous piece to clear
|
|
*/
|
|
error = xfs_zero_remaining_bytes(ip, offset, offset + len - 1);
|
|
else {
|
|
/*
|
|
* Some full blocks, possibly two pieces to clear
|
|
*/
|
|
if (offset < XFS_FSB_TO_B(mp, startoffset_fsb))
|
|
error = xfs_zero_remaining_bytes(ip, offset,
|
|
XFS_FSB_TO_B(mp, startoffset_fsb) - 1);
|
|
if (!error &&
|
|
XFS_FSB_TO_B(mp, endoffset_fsb) < offset + len)
|
|
error = xfs_zero_remaining_bytes(ip,
|
|
XFS_FSB_TO_B(mp, endoffset_fsb),
|
|
offset + len - 1);
|
|
}
|
|
|
|
/*
|
|
* free file space until done or until there is an error
|
|
*/
|
|
resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0);
|
|
while (!error && !done) {
|
|
|
|
/*
|
|
* allocate and setup the transaction. Allow this
|
|
* transaction to dip into the reserve blocks to ensure
|
|
* the freeing of the space succeeds at ENOSPC.
|
|
*/
|
|
tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT);
|
|
tp->t_flags |= XFS_TRANS_RESERVE;
|
|
error = xfs_trans_reserve(tp, &M_RES(mp)->tr_write, resblks, 0);
|
|
|
|
/*
|
|
* check for running out of space
|
|
*/
|
|
if (error) {
|
|
/*
|
|
* Free the transaction structure.
|
|
*/
|
|
ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp));
|
|
xfs_trans_cancel(tp, 0);
|
|
break;
|
|
}
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
error = xfs_trans_reserve_quota(tp, mp,
|
|
ip->i_udquot, ip->i_gdquot, ip->i_pdquot,
|
|
resblks, 0, XFS_QMOPT_RES_REGBLKS);
|
|
if (error)
|
|
goto error1;
|
|
|
|
xfs_trans_ijoin(tp, ip, 0);
|
|
|
|
/*
|
|
* issue the bunmapi() call to free the blocks
|
|
*/
|
|
xfs_bmap_init(&free_list, &firstfsb);
|
|
error = xfs_bunmapi(tp, ip, startoffset_fsb,
|
|
endoffset_fsb - startoffset_fsb,
|
|
0, 2, &firstfsb, &free_list, &done);
|
|
if (error) {
|
|
goto error0;
|
|
}
|
|
|
|
/*
|
|
* complete the transaction
|
|
*/
|
|
error = xfs_bmap_finish(&tp, &free_list, &committed);
|
|
if (error) {
|
|
goto error0;
|
|
}
|
|
|
|
error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
}
|
|
|
|
out:
|
|
return error;
|
|
|
|
error0:
|
|
xfs_bmap_cancel(&free_list);
|
|
error1:
|
|
xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
goto out;
|
|
}
|
|
|
|
|
|
int
|
|
xfs_zero_file_space(
|
|
struct xfs_inode *ip,
|
|
xfs_off_t offset,
|
|
xfs_off_t len)
|
|
{
|
|
struct xfs_mount *mp = ip->i_mount;
|
|
uint granularity;
|
|
xfs_off_t start_boundary;
|
|
xfs_off_t end_boundary;
|
|
int error;
|
|
|
|
granularity = max_t(uint, 1 << mp->m_sb.sb_blocklog, PAGE_CACHE_SIZE);
|
|
|
|
/*
|
|
* Round the range of extents we are going to convert inwards. If the
|
|
* offset is aligned, then it doesn't get changed so we zero from the
|
|
* start of the block offset points to.
|
|
*/
|
|
start_boundary = round_up(offset, granularity);
|
|
end_boundary = round_down(offset + len, granularity);
|
|
|
|
ASSERT(start_boundary >= offset);
|
|
ASSERT(end_boundary <= offset + len);
|
|
|
|
if (start_boundary < end_boundary - 1) {
|
|
/* punch out the page cache over the conversion range */
|
|
truncate_pagecache_range(VFS_I(ip), start_boundary,
|
|
end_boundary - 1);
|
|
/* convert the blocks */
|
|
error = xfs_alloc_file_space(ip, start_boundary,
|
|
end_boundary - start_boundary - 1,
|
|
XFS_BMAPI_PREALLOC | XFS_BMAPI_CONVERT);
|
|
if (error)
|
|
goto out;
|
|
|
|
/* We've handled the interior of the range, now for the edges */
|
|
if (start_boundary != offset) {
|
|
error = xfs_iozero(ip, offset, start_boundary - offset);
|
|
if (error)
|
|
goto out;
|
|
}
|
|
|
|
if (end_boundary != offset + len)
|
|
error = xfs_iozero(ip, end_boundary,
|
|
offset + len - end_boundary);
|
|
|
|
} else {
|
|
/*
|
|
* It's either a sub-granularity range or the range spanned lies
|
|
* partially across two adjacent blocks.
|
|
*/
|
|
error = xfs_iozero(ip, offset, len);
|
|
}
|
|
|
|
out:
|
|
return error;
|
|
|
|
}
|
|
|
|
/*
|
|
* We need to check that the format of the data fork in the temporary inode is
|
|
* valid for the target inode before doing the swap. This is not a problem with
|
|
* attr1 because of the fixed fork offset, but attr2 has a dynamically sized
|
|
* data fork depending on the space the attribute fork is taking so we can get
|
|
* invalid formats on the target inode.
|
|
*
|
|
* E.g. target has space for 7 extents in extent format, temp inode only has
|
|
* space for 6. If we defragment down to 7 extents, then the tmp format is a
|
|
* btree, but when swapped it needs to be in extent format. Hence we can't just
|
|
* blindly swap data forks on attr2 filesystems.
|
|
*
|
|
* Note that we check the swap in both directions so that we don't end up with
|
|
* a corrupt temporary inode, either.
|
|
*
|
|
* Note that fixing the way xfs_fsr sets up the attribute fork in the source
|
|
* inode will prevent this situation from occurring, so all we do here is
|
|
* reject and log the attempt. basically we are putting the responsibility on
|
|
* userspace to get this right.
|
|
*/
|
|
static int
|
|
xfs_swap_extents_check_format(
|
|
xfs_inode_t *ip, /* target inode */
|
|
xfs_inode_t *tip) /* tmp inode */
|
|
{
|
|
|
|
/* Should never get a local format */
|
|
if (ip->i_d.di_format == XFS_DINODE_FMT_LOCAL ||
|
|
tip->i_d.di_format == XFS_DINODE_FMT_LOCAL)
|
|
return EINVAL;
|
|
|
|
/*
|
|
* if the target inode has less extents that then temporary inode then
|
|
* why did userspace call us?
|
|
*/
|
|
if (ip->i_d.di_nextents < tip->i_d.di_nextents)
|
|
return EINVAL;
|
|
|
|
/*
|
|
* if the target inode is in extent form and the temp inode is in btree
|
|
* form then we will end up with the target inode in the wrong format
|
|
* as we already know there are less extents in the temp inode.
|
|
*/
|
|
if (ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS &&
|
|
tip->i_d.di_format == XFS_DINODE_FMT_BTREE)
|
|
return EINVAL;
|
|
|
|
/* Check temp in extent form to max in target */
|
|
if (tip->i_d.di_format == XFS_DINODE_FMT_EXTENTS &&
|
|
XFS_IFORK_NEXTENTS(tip, XFS_DATA_FORK) >
|
|
XFS_IFORK_MAXEXT(ip, XFS_DATA_FORK))
|
|
return EINVAL;
|
|
|
|
/* Check target in extent form to max in temp */
|
|
if (ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS &&
|
|
XFS_IFORK_NEXTENTS(ip, XFS_DATA_FORK) >
|
|
XFS_IFORK_MAXEXT(tip, XFS_DATA_FORK))
|
|
return EINVAL;
|
|
|
|
/*
|
|
* If we are in a btree format, check that the temp root block will fit
|
|
* in the target and that it has enough extents to be in btree format
|
|
* in the target.
|
|
*
|
|
* Note that we have to be careful to allow btree->extent conversions
|
|
* (a common defrag case) which will occur when the temp inode is in
|
|
* extent format...
|
|
*/
|
|
if (tip->i_d.di_format == XFS_DINODE_FMT_BTREE) {
|
|
if (XFS_IFORK_BOFF(ip) &&
|
|
XFS_BMAP_BMDR_SPACE(tip->i_df.if_broot) > XFS_IFORK_BOFF(ip))
|
|
return EINVAL;
|
|
if (XFS_IFORK_NEXTENTS(tip, XFS_DATA_FORK) <=
|
|
XFS_IFORK_MAXEXT(ip, XFS_DATA_FORK))
|
|
return EINVAL;
|
|
}
|
|
|
|
/* Reciprocal target->temp btree format checks */
|
|
if (ip->i_d.di_format == XFS_DINODE_FMT_BTREE) {
|
|
if (XFS_IFORK_BOFF(tip) &&
|
|
XFS_BMAP_BMDR_SPACE(ip->i_df.if_broot) > XFS_IFORK_BOFF(tip))
|
|
return EINVAL;
|
|
if (XFS_IFORK_NEXTENTS(ip, XFS_DATA_FORK) <=
|
|
XFS_IFORK_MAXEXT(tip, XFS_DATA_FORK))
|
|
return EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
xfs_swap_extents(
|
|
xfs_inode_t *ip, /* target inode */
|
|
xfs_inode_t *tip, /* tmp inode */
|
|
xfs_swapext_t *sxp)
|
|
{
|
|
xfs_mount_t *mp = ip->i_mount;
|
|
xfs_trans_t *tp;
|
|
xfs_bstat_t *sbp = &sxp->sx_stat;
|
|
xfs_ifork_t *tempifp, *ifp, *tifp;
|
|
int src_log_flags, target_log_flags;
|
|
int error = 0;
|
|
int aforkblks = 0;
|
|
int taforkblks = 0;
|
|
__uint64_t tmp;
|
|
|
|
tempifp = kmem_alloc(sizeof(xfs_ifork_t), KM_MAYFAIL);
|
|
if (!tempifp) {
|
|
error = XFS_ERROR(ENOMEM);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* we have to do two separate lock calls here to keep lockdep
|
|
* happy. If we try to get all the locks in one call, lock will
|
|
* report false positives when we drop the ILOCK and regain them
|
|
* below.
|
|
*/
|
|
xfs_lock_two_inodes(ip, tip, XFS_IOLOCK_EXCL);
|
|
xfs_lock_two_inodes(ip, tip, XFS_ILOCK_EXCL);
|
|
|
|
/* Verify that both files have the same format */
|
|
if ((ip->i_d.di_mode & S_IFMT) != (tip->i_d.di_mode & S_IFMT)) {
|
|
error = XFS_ERROR(EINVAL);
|
|
goto out_unlock;
|
|
}
|
|
|
|
/* Verify both files are either real-time or non-realtime */
|
|
if (XFS_IS_REALTIME_INODE(ip) != XFS_IS_REALTIME_INODE(tip)) {
|
|
error = XFS_ERROR(EINVAL);
|
|
goto out_unlock;
|
|
}
|
|
|
|
error = -filemap_write_and_wait(VFS_I(tip)->i_mapping);
|
|
if (error)
|
|
goto out_unlock;
|
|
truncate_pagecache_range(VFS_I(tip), 0, -1);
|
|
|
|
/* Verify O_DIRECT for ftmp */
|
|
if (VN_CACHED(VFS_I(tip)) != 0) {
|
|
error = XFS_ERROR(EINVAL);
|
|
goto out_unlock;
|
|
}
|
|
|
|
/* Verify all data are being swapped */
|
|
if (sxp->sx_offset != 0 ||
|
|
sxp->sx_length != ip->i_d.di_size ||
|
|
sxp->sx_length != tip->i_d.di_size) {
|
|
error = XFS_ERROR(EFAULT);
|
|
goto out_unlock;
|
|
}
|
|
|
|
trace_xfs_swap_extent_before(ip, 0);
|
|
trace_xfs_swap_extent_before(tip, 1);
|
|
|
|
/* check inode formats now that data is flushed */
|
|
error = xfs_swap_extents_check_format(ip, tip);
|
|
if (error) {
|
|
xfs_notice(mp,
|
|
"%s: inode 0x%llx format is incompatible for exchanging.",
|
|
__func__, ip->i_ino);
|
|
goto out_unlock;
|
|
}
|
|
|
|
/*
|
|
* Compare the current change & modify times with that
|
|
* passed in. If they differ, we abort this swap.
|
|
* This is the mechanism used to ensure the calling
|
|
* process that the file was not changed out from
|
|
* under it.
|
|
*/
|
|
if ((sbp->bs_ctime.tv_sec != VFS_I(ip)->i_ctime.tv_sec) ||
|
|
(sbp->bs_ctime.tv_nsec != VFS_I(ip)->i_ctime.tv_nsec) ||
|
|
(sbp->bs_mtime.tv_sec != VFS_I(ip)->i_mtime.tv_sec) ||
|
|
(sbp->bs_mtime.tv_nsec != VFS_I(ip)->i_mtime.tv_nsec)) {
|
|
error = XFS_ERROR(EBUSY);
|
|
goto out_unlock;
|
|
}
|
|
|
|
/* We need to fail if the file is memory mapped. Once we have tossed
|
|
* all existing pages, the page fault will have no option
|
|
* but to go to the filesystem for pages. By making the page fault call
|
|
* vop_read (or write in the case of autogrow) they block on the iolock
|
|
* until we have switched the extents.
|
|
*/
|
|
if (VN_MAPPED(VFS_I(ip))) {
|
|
error = XFS_ERROR(EBUSY);
|
|
goto out_unlock;
|
|
}
|
|
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
xfs_iunlock(tip, XFS_ILOCK_EXCL);
|
|
|
|
/*
|
|
* There is a race condition here since we gave up the
|
|
* ilock. However, the data fork will not change since
|
|
* we have the iolock (locked for truncation too) so we
|
|
* are safe. We don't really care if non-io related
|
|
* fields change.
|
|
*/
|
|
truncate_pagecache_range(VFS_I(ip), 0, -1);
|
|
|
|
tp = xfs_trans_alloc(mp, XFS_TRANS_SWAPEXT);
|
|
error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
|
|
if (error) {
|
|
xfs_iunlock(ip, XFS_IOLOCK_EXCL);
|
|
xfs_iunlock(tip, XFS_IOLOCK_EXCL);
|
|
xfs_trans_cancel(tp, 0);
|
|
goto out;
|
|
}
|
|
xfs_lock_two_inodes(ip, tip, XFS_ILOCK_EXCL);
|
|
|
|
/*
|
|
* Count the number of extended attribute blocks
|
|
*/
|
|
if ( ((XFS_IFORK_Q(ip) != 0) && (ip->i_d.di_anextents > 0)) &&
|
|
(ip->i_d.di_aformat != XFS_DINODE_FMT_LOCAL)) {
|
|
error = xfs_bmap_count_blocks(tp, ip, XFS_ATTR_FORK, &aforkblks);
|
|
if (error)
|
|
goto out_trans_cancel;
|
|
}
|
|
if ( ((XFS_IFORK_Q(tip) != 0) && (tip->i_d.di_anextents > 0)) &&
|
|
(tip->i_d.di_aformat != XFS_DINODE_FMT_LOCAL)) {
|
|
error = xfs_bmap_count_blocks(tp, tip, XFS_ATTR_FORK,
|
|
&taforkblks);
|
|
if (error)
|
|
goto out_trans_cancel;
|
|
}
|
|
|
|
xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
|
|
xfs_trans_ijoin(tp, tip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
|
|
|
|
/*
|
|
* Before we've swapped the forks, lets set the owners of the forks
|
|
* appropriately. We have to do this as we are demand paging the btree
|
|
* buffers, and so the validation done on read will expect the owner
|
|
* field to be correctly set. Once we change the owners, we can swap the
|
|
* inode forks.
|
|
*
|
|
* Note the trickiness in setting the log flags - we set the owner log
|
|
* flag on the opposite inode (i.e. the inode we are setting the new
|
|
* owner to be) because once we swap the forks and log that, log
|
|
* recovery is going to see the fork as owned by the swapped inode,
|
|
* not the pre-swapped inodes.
|
|
*/
|
|
src_log_flags = XFS_ILOG_CORE;
|
|
target_log_flags = XFS_ILOG_CORE;
|
|
if (ip->i_d.di_version == 3 &&
|
|
ip->i_d.di_format == XFS_DINODE_FMT_BTREE) {
|
|
target_log_flags |= XFS_ILOG_DOWNER;
|
|
error = xfs_bmbt_change_owner(tp, ip, XFS_DATA_FORK,
|
|
tip->i_ino, NULL);
|
|
if (error)
|
|
goto out_trans_cancel;
|
|
}
|
|
|
|
if (tip->i_d.di_version == 3 &&
|
|
tip->i_d.di_format == XFS_DINODE_FMT_BTREE) {
|
|
src_log_flags |= XFS_ILOG_DOWNER;
|
|
error = xfs_bmbt_change_owner(tp, tip, XFS_DATA_FORK,
|
|
ip->i_ino, NULL);
|
|
if (error)
|
|
goto out_trans_cancel;
|
|
}
|
|
|
|
/*
|
|
* Swap the data forks of the inodes
|
|
*/
|
|
ifp = &ip->i_df;
|
|
tifp = &tip->i_df;
|
|
*tempifp = *ifp; /* struct copy */
|
|
*ifp = *tifp; /* struct copy */
|
|
*tifp = *tempifp; /* struct copy */
|
|
|
|
/*
|
|
* Fix the on-disk inode values
|
|
*/
|
|
tmp = (__uint64_t)ip->i_d.di_nblocks;
|
|
ip->i_d.di_nblocks = tip->i_d.di_nblocks - taforkblks + aforkblks;
|
|
tip->i_d.di_nblocks = tmp + taforkblks - aforkblks;
|
|
|
|
tmp = (__uint64_t) ip->i_d.di_nextents;
|
|
ip->i_d.di_nextents = tip->i_d.di_nextents;
|
|
tip->i_d.di_nextents = tmp;
|
|
|
|
tmp = (__uint64_t) ip->i_d.di_format;
|
|
ip->i_d.di_format = tip->i_d.di_format;
|
|
tip->i_d.di_format = tmp;
|
|
|
|
/*
|
|
* The extents in the source inode could still contain speculative
|
|
* preallocation beyond EOF (e.g. the file is open but not modified
|
|
* while defrag is in progress). In that case, we need to copy over the
|
|
* number of delalloc blocks the data fork in the source inode is
|
|
* tracking beyond EOF so that when the fork is truncated away when the
|
|
* temporary inode is unlinked we don't underrun the i_delayed_blks
|
|
* counter on that inode.
|
|
*/
|
|
ASSERT(tip->i_delayed_blks == 0);
|
|
tip->i_delayed_blks = ip->i_delayed_blks;
|
|
ip->i_delayed_blks = 0;
|
|
|
|
switch (ip->i_d.di_format) {
|
|
case XFS_DINODE_FMT_EXTENTS:
|
|
/* If the extents fit in the inode, fix the
|
|
* pointer. Otherwise it's already NULL or
|
|
* pointing to the extent.
|
|
*/
|
|
if (ip->i_d.di_nextents <= XFS_INLINE_EXTS) {
|
|
ifp->if_u1.if_extents =
|
|
ifp->if_u2.if_inline_ext;
|
|
}
|
|
src_log_flags |= XFS_ILOG_DEXT;
|
|
break;
|
|
case XFS_DINODE_FMT_BTREE:
|
|
ASSERT(ip->i_d.di_version < 3 ||
|
|
(src_log_flags & XFS_ILOG_DOWNER));
|
|
src_log_flags |= XFS_ILOG_DBROOT;
|
|
break;
|
|
}
|
|
|
|
switch (tip->i_d.di_format) {
|
|
case XFS_DINODE_FMT_EXTENTS:
|
|
/* If the extents fit in the inode, fix the
|
|
* pointer. Otherwise it's already NULL or
|
|
* pointing to the extent.
|
|
*/
|
|
if (tip->i_d.di_nextents <= XFS_INLINE_EXTS) {
|
|
tifp->if_u1.if_extents =
|
|
tifp->if_u2.if_inline_ext;
|
|
}
|
|
target_log_flags |= XFS_ILOG_DEXT;
|
|
break;
|
|
case XFS_DINODE_FMT_BTREE:
|
|
target_log_flags |= XFS_ILOG_DBROOT;
|
|
ASSERT(tip->i_d.di_version < 3 ||
|
|
(target_log_flags & XFS_ILOG_DOWNER));
|
|
break;
|
|
}
|
|
|
|
xfs_trans_log_inode(tp, ip, src_log_flags);
|
|
xfs_trans_log_inode(tp, tip, target_log_flags);
|
|
|
|
/*
|
|
* If this is a synchronous mount, make sure that the
|
|
* transaction goes to disk before returning to the user.
|
|
*/
|
|
if (mp->m_flags & XFS_MOUNT_WSYNC)
|
|
xfs_trans_set_sync(tp);
|
|
|
|
error = xfs_trans_commit(tp, 0);
|
|
|
|
trace_xfs_swap_extent_after(ip, 0);
|
|
trace_xfs_swap_extent_after(tip, 1);
|
|
out:
|
|
kmem_free(tempifp);
|
|
return error;
|
|
|
|
out_unlock:
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
|
|
xfs_iunlock(tip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
|
|
goto out;
|
|
|
|
out_trans_cancel:
|
|
xfs_trans_cancel(tp, 0);
|
|
goto out_unlock;
|
|
}
|