4425 lines
109 KiB
C
4425 lines
109 KiB
C
/*
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* Copyright (c) 2000-2006 Silicon Graphics, 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_types.h"
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#include "xfs_bit.h"
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#include "xfs_log.h"
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#include "xfs_inum.h"
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#include "xfs_trans.h"
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#include "xfs_sb.h"
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#include "xfs_ag.h"
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#include "xfs_dir2.h"
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#include "xfs_dmapi.h"
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#include "xfs_mount.h"
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#include "xfs_da_btree.h"
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#include "xfs_bmap_btree.h"
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#include "xfs_alloc_btree.h"
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#include "xfs_ialloc_btree.h"
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#include "xfs_dir2_sf.h"
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#include "xfs_attr_sf.h"
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#include "xfs_dinode.h"
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#include "xfs_inode.h"
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#include "xfs_inode_item.h"
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#include "xfs_itable.h"
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#include "xfs_btree.h"
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#include "xfs_ialloc.h"
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#include "xfs_alloc.h"
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#include "xfs_bmap.h"
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#include "xfs_attr.h"
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#include "xfs_rw.h"
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#include "xfs_error.h"
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#include "xfs_quota.h"
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#include "xfs_utils.h"
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#include "xfs_rtalloc.h"
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#include "xfs_refcache.h"
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#include "xfs_trans_space.h"
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#include "xfs_log_priv.h"
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#include "xfs_filestream.h"
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#include "xfs_vnodeops.h"
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int
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xfs_open(
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xfs_inode_t *ip)
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{
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int mode;
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if (XFS_FORCED_SHUTDOWN(ip->i_mount))
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return XFS_ERROR(EIO);
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/*
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* If it's a directory with any blocks, read-ahead block 0
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* as we're almost certain to have the next operation be a read there.
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*/
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if (S_ISDIR(ip->i_d.di_mode) && ip->i_d.di_nextents > 0) {
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mode = xfs_ilock_map_shared(ip);
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if (ip->i_d.di_nextents > 0)
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(void)xfs_da_reada_buf(NULL, ip, 0, XFS_DATA_FORK);
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xfs_iunlock(ip, mode);
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}
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return 0;
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}
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/*
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* xfs_getattr
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*/
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int
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xfs_getattr(
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xfs_inode_t *ip,
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bhv_vattr_t *vap,
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int flags)
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{
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bhv_vnode_t *vp = XFS_ITOV(ip);
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xfs_mount_t *mp = ip->i_mount;
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xfs_itrace_entry(ip);
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if (XFS_FORCED_SHUTDOWN(mp))
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return XFS_ERROR(EIO);
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if (!(flags & ATTR_LAZY))
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xfs_ilock(ip, XFS_ILOCK_SHARED);
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vap->va_size = XFS_ISIZE(ip);
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if (vap->va_mask == XFS_AT_SIZE)
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goto all_done;
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vap->va_nblocks =
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XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
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vap->va_nodeid = ip->i_ino;
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#if XFS_BIG_INUMS
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vap->va_nodeid += mp->m_inoadd;
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#endif
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vap->va_nlink = ip->i_d.di_nlink;
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/*
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* Quick exit for non-stat callers
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*/
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if ((vap->va_mask &
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~(XFS_AT_SIZE|XFS_AT_FSID|XFS_AT_NODEID|
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XFS_AT_NLINK|XFS_AT_BLKSIZE)) == 0)
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goto all_done;
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/*
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* Copy from in-core inode.
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*/
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vap->va_mode = ip->i_d.di_mode;
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vap->va_uid = ip->i_d.di_uid;
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vap->va_gid = ip->i_d.di_gid;
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vap->va_projid = ip->i_d.di_projid;
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/*
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* Check vnode type block/char vs. everything else.
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*/
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switch (ip->i_d.di_mode & S_IFMT) {
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case S_IFBLK:
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case S_IFCHR:
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vap->va_rdev = ip->i_df.if_u2.if_rdev;
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vap->va_blocksize = BLKDEV_IOSIZE;
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break;
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default:
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vap->va_rdev = 0;
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if (!(XFS_IS_REALTIME_INODE(ip))) {
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vap->va_blocksize = xfs_preferred_iosize(mp);
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} else {
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/*
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* If the file blocks are being allocated from a
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* realtime partition, then return the inode's
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* realtime extent size or the realtime volume's
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* extent size.
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*/
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vap->va_blocksize =
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xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog;
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}
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break;
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}
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vn_atime_to_timespec(vp, &vap->va_atime);
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vap->va_mtime.tv_sec = ip->i_d.di_mtime.t_sec;
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vap->va_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec;
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vap->va_ctime.tv_sec = ip->i_d.di_ctime.t_sec;
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vap->va_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec;
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/*
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* Exit for stat callers. See if any of the rest of the fields
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* to be filled in are needed.
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*/
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if ((vap->va_mask &
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(XFS_AT_XFLAGS|XFS_AT_EXTSIZE|XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS|
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XFS_AT_GENCOUNT|XFS_AT_VCODE)) == 0)
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goto all_done;
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/*
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* Convert di_flags to xflags.
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*/
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vap->va_xflags = xfs_ip2xflags(ip);
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/*
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* Exit for inode revalidate. See if any of the rest of
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* the fields to be filled in are needed.
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*/
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if ((vap->va_mask &
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(XFS_AT_EXTSIZE|XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS|
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XFS_AT_GENCOUNT|XFS_AT_VCODE)) == 0)
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goto all_done;
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vap->va_extsize = ip->i_d.di_extsize << mp->m_sb.sb_blocklog;
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vap->va_nextents =
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(ip->i_df.if_flags & XFS_IFEXTENTS) ?
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ip->i_df.if_bytes / sizeof(xfs_bmbt_rec_t) :
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ip->i_d.di_nextents;
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if (ip->i_afp)
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vap->va_anextents =
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(ip->i_afp->if_flags & XFS_IFEXTENTS) ?
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ip->i_afp->if_bytes / sizeof(xfs_bmbt_rec_t) :
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ip->i_d.di_anextents;
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else
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vap->va_anextents = 0;
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vap->va_gen = ip->i_d.di_gen;
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all_done:
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if (!(flags & ATTR_LAZY))
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xfs_iunlock(ip, XFS_ILOCK_SHARED);
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return 0;
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}
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/*
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* xfs_setattr
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*/
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int
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xfs_setattr(
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xfs_inode_t *ip,
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bhv_vattr_t *vap,
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int flags,
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cred_t *credp)
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{
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bhv_vnode_t *vp = XFS_ITOV(ip);
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xfs_mount_t *mp = ip->i_mount;
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xfs_trans_t *tp;
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int mask;
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int code;
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uint lock_flags;
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uint commit_flags=0;
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uid_t uid=0, iuid=0;
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gid_t gid=0, igid=0;
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int timeflags = 0;
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xfs_prid_t projid=0, iprojid=0;
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int mandlock_before, mandlock_after;
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struct xfs_dquot *udqp, *gdqp, *olddquot1, *olddquot2;
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int file_owner;
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int need_iolock = 1;
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xfs_itrace_entry(ip);
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if (mp->m_flags & XFS_MOUNT_RDONLY)
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return XFS_ERROR(EROFS);
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/*
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* Cannot set certain attributes.
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*/
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mask = vap->va_mask;
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if (mask & XFS_AT_NOSET) {
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return XFS_ERROR(EINVAL);
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}
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if (XFS_FORCED_SHUTDOWN(mp))
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return XFS_ERROR(EIO);
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/*
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* Timestamps do not need to be logged and hence do not
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* need to be done within a transaction.
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*/
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if (mask & XFS_AT_UPDTIMES) {
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ASSERT((mask & ~XFS_AT_UPDTIMES) == 0);
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timeflags = ((mask & XFS_AT_UPDATIME) ? XFS_ICHGTIME_ACC : 0) |
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((mask & XFS_AT_UPDCTIME) ? XFS_ICHGTIME_CHG : 0) |
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((mask & XFS_AT_UPDMTIME) ? XFS_ICHGTIME_MOD : 0);
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xfs_ichgtime(ip, timeflags);
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return 0;
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}
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olddquot1 = olddquot2 = NULL;
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udqp = gdqp = NULL;
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/*
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* If disk quotas is on, we make sure that the dquots do exist on disk,
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* before we start any other transactions. Trying to do this later
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* is messy. We don't care to take a readlock to look at the ids
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* in inode here, because we can't hold it across the trans_reserve.
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* If the IDs do change before we take the ilock, we're covered
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* because the i_*dquot fields will get updated anyway.
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*/
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if (XFS_IS_QUOTA_ON(mp) &&
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(mask & (XFS_AT_UID|XFS_AT_GID|XFS_AT_PROJID))) {
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uint qflags = 0;
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if ((mask & XFS_AT_UID) && XFS_IS_UQUOTA_ON(mp)) {
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uid = vap->va_uid;
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qflags |= XFS_QMOPT_UQUOTA;
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} else {
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uid = ip->i_d.di_uid;
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}
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if ((mask & XFS_AT_GID) && XFS_IS_GQUOTA_ON(mp)) {
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gid = vap->va_gid;
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qflags |= XFS_QMOPT_GQUOTA;
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} else {
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gid = ip->i_d.di_gid;
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}
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if ((mask & XFS_AT_PROJID) && XFS_IS_PQUOTA_ON(mp)) {
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projid = vap->va_projid;
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qflags |= XFS_QMOPT_PQUOTA;
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} else {
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projid = ip->i_d.di_projid;
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}
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/*
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* We take a reference when we initialize udqp and gdqp,
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* so it is important that we never blindly double trip on
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* the same variable. See xfs_create() for an example.
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*/
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ASSERT(udqp == NULL);
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ASSERT(gdqp == NULL);
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code = XFS_QM_DQVOPALLOC(mp, ip, uid, gid, projid, qflags,
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&udqp, &gdqp);
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if (code)
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return code;
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}
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/*
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* For the other attributes, we acquire the inode lock and
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* first do an error checking pass.
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*/
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tp = NULL;
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lock_flags = XFS_ILOCK_EXCL;
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if (flags & ATTR_NOLOCK)
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need_iolock = 0;
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if (!(mask & XFS_AT_SIZE)) {
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if ((mask != (XFS_AT_CTIME|XFS_AT_ATIME|XFS_AT_MTIME)) ||
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(mp->m_flags & XFS_MOUNT_WSYNC)) {
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tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
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commit_flags = 0;
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if ((code = xfs_trans_reserve(tp, 0,
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XFS_ICHANGE_LOG_RES(mp), 0,
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0, 0))) {
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lock_flags = 0;
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goto error_return;
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}
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}
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} else {
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if (DM_EVENT_ENABLED(ip, DM_EVENT_TRUNCATE) &&
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!(flags & ATTR_DMI)) {
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int dmflags = AT_DELAY_FLAG(flags) | DM_SEM_FLAG_WR;
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code = XFS_SEND_DATA(mp, DM_EVENT_TRUNCATE, vp,
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vap->va_size, 0, dmflags, NULL);
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if (code) {
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lock_flags = 0;
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goto error_return;
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}
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}
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if (need_iolock)
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lock_flags |= XFS_IOLOCK_EXCL;
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}
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xfs_ilock(ip, lock_flags);
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|
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/* boolean: are we the file owner? */
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file_owner = (current_fsuid(credp) == ip->i_d.di_uid);
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|
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/*
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* Change various properties of a file.
|
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* Only the owner or users with CAP_FOWNER
|
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* capability may do these things.
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*/
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if (mask &
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(XFS_AT_MODE|XFS_AT_XFLAGS|XFS_AT_EXTSIZE|XFS_AT_UID|
|
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XFS_AT_GID|XFS_AT_PROJID)) {
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/*
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* CAP_FOWNER overrides the following restrictions:
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*
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* The user ID of the calling process must be equal
|
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* to the file owner ID, except in cases where the
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* CAP_FSETID capability is applicable.
|
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*/
|
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if (!file_owner && !capable(CAP_FOWNER)) {
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code = XFS_ERROR(EPERM);
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goto error_return;
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}
|
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|
|
/*
|
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* CAP_FSETID overrides the following restrictions:
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*
|
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* The effective user ID of the calling process shall match
|
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* the file owner when setting the set-user-ID and
|
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* set-group-ID bits on that file.
|
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*
|
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* The effective group ID or one of the supplementary group
|
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* IDs of the calling process shall match the group owner of
|
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* the file when setting the set-group-ID bit on that file
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*/
|
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if (mask & XFS_AT_MODE) {
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mode_t m = 0;
|
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|
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if ((vap->va_mode & S_ISUID) && !file_owner)
|
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m |= S_ISUID;
|
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if ((vap->va_mode & S_ISGID) &&
|
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!in_group_p((gid_t)ip->i_d.di_gid))
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m |= S_ISGID;
|
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#if 0
|
|
/* Linux allows this, Irix doesn't. */
|
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if ((vap->va_mode & S_ISVTX) && !VN_ISDIR(vp))
|
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m |= S_ISVTX;
|
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#endif
|
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if (m && !capable(CAP_FSETID))
|
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vap->va_mode &= ~m;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Change file ownership. Must be the owner or privileged.
|
|
* If the system was configured with the "restricted_chown"
|
|
* option, the owner is not permitted to give away the file,
|
|
* and can change the group id only to a group of which he
|
|
* or she is a member.
|
|
*/
|
|
if (mask & (XFS_AT_UID|XFS_AT_GID|XFS_AT_PROJID)) {
|
|
/*
|
|
* These IDs could have changed since we last looked at them.
|
|
* But, we're assured that if the ownership did change
|
|
* while we didn't have the inode locked, inode's dquot(s)
|
|
* would have changed also.
|
|
*/
|
|
iuid = ip->i_d.di_uid;
|
|
iprojid = ip->i_d.di_projid;
|
|
igid = ip->i_d.di_gid;
|
|
gid = (mask & XFS_AT_GID) ? vap->va_gid : igid;
|
|
uid = (mask & XFS_AT_UID) ? vap->va_uid : iuid;
|
|
projid = (mask & XFS_AT_PROJID) ? (xfs_prid_t)vap->va_projid :
|
|
iprojid;
|
|
|
|
/*
|
|
* CAP_CHOWN overrides the following restrictions:
|
|
*
|
|
* If _POSIX_CHOWN_RESTRICTED is defined, this capability
|
|
* shall override the restriction that a process cannot
|
|
* change the user ID of a file it owns and the restriction
|
|
* that the group ID supplied to the chown() function
|
|
* shall be equal to either the group ID or one of the
|
|
* supplementary group IDs of the calling process.
|
|
*/
|
|
if (restricted_chown &&
|
|
(iuid != uid || (igid != gid &&
|
|
!in_group_p((gid_t)gid))) &&
|
|
!capable(CAP_CHOWN)) {
|
|
code = XFS_ERROR(EPERM);
|
|
goto error_return;
|
|
}
|
|
/*
|
|
* Do a quota reservation only if uid/projid/gid is actually
|
|
* going to change.
|
|
*/
|
|
if ((XFS_IS_UQUOTA_ON(mp) && iuid != uid) ||
|
|
(XFS_IS_PQUOTA_ON(mp) && iprojid != projid) ||
|
|
(XFS_IS_GQUOTA_ON(mp) && igid != gid)) {
|
|
ASSERT(tp);
|
|
code = XFS_QM_DQVOPCHOWNRESV(mp, tp, ip, udqp, gdqp,
|
|
capable(CAP_FOWNER) ?
|
|
XFS_QMOPT_FORCE_RES : 0);
|
|
if (code) /* out of quota */
|
|
goto error_return;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Truncate file. Must have write permission and not be a directory.
|
|
*/
|
|
if (mask & XFS_AT_SIZE) {
|
|
/* Short circuit the truncate case for zero length files */
|
|
if ((vap->va_size == 0) &&
|
|
(ip->i_size == 0) && (ip->i_d.di_nextents == 0)) {
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
lock_flags &= ~XFS_ILOCK_EXCL;
|
|
if (mask & XFS_AT_CTIME)
|
|
xfs_ichgtime(ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
|
|
code = 0;
|
|
goto error_return;
|
|
}
|
|
|
|
if (VN_ISDIR(vp)) {
|
|
code = XFS_ERROR(EISDIR);
|
|
goto error_return;
|
|
} else if (!VN_ISREG(vp)) {
|
|
code = XFS_ERROR(EINVAL);
|
|
goto error_return;
|
|
}
|
|
/*
|
|
* Make sure that the dquots are attached to the inode.
|
|
*/
|
|
if ((code = XFS_QM_DQATTACH(mp, ip, XFS_QMOPT_ILOCKED)))
|
|
goto error_return;
|
|
}
|
|
|
|
/*
|
|
* Change file access or modified times.
|
|
*/
|
|
if (mask & (XFS_AT_ATIME|XFS_AT_MTIME)) {
|
|
if (!file_owner) {
|
|
if ((flags & ATTR_UTIME) &&
|
|
!capable(CAP_FOWNER)) {
|
|
code = XFS_ERROR(EPERM);
|
|
goto error_return;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Change extent size or realtime flag.
|
|
*/
|
|
if (mask & (XFS_AT_EXTSIZE|XFS_AT_XFLAGS)) {
|
|
/*
|
|
* Can't change extent size if any extents are allocated.
|
|
*/
|
|
if (ip->i_d.di_nextents && (mask & XFS_AT_EXTSIZE) &&
|
|
((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
|
|
vap->va_extsize) ) {
|
|
code = XFS_ERROR(EINVAL); /* EFBIG? */
|
|
goto error_return;
|
|
}
|
|
|
|
/*
|
|
* Can't change realtime flag if any extents are allocated.
|
|
*/
|
|
if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
|
|
(mask & XFS_AT_XFLAGS) &&
|
|
(XFS_IS_REALTIME_INODE(ip)) !=
|
|
(vap->va_xflags & XFS_XFLAG_REALTIME)) {
|
|
code = XFS_ERROR(EINVAL); /* EFBIG? */
|
|
goto error_return;
|
|
}
|
|
/*
|
|
* Extent size must be a multiple of the appropriate block
|
|
* size, if set at all.
|
|
*/
|
|
if ((mask & XFS_AT_EXTSIZE) && vap->va_extsize != 0) {
|
|
xfs_extlen_t size;
|
|
|
|
if (XFS_IS_REALTIME_INODE(ip) ||
|
|
((mask & XFS_AT_XFLAGS) &&
|
|
(vap->va_xflags & XFS_XFLAG_REALTIME))) {
|
|
size = mp->m_sb.sb_rextsize <<
|
|
mp->m_sb.sb_blocklog;
|
|
} else {
|
|
size = mp->m_sb.sb_blocksize;
|
|
}
|
|
if (vap->va_extsize % size) {
|
|
code = XFS_ERROR(EINVAL);
|
|
goto error_return;
|
|
}
|
|
}
|
|
/*
|
|
* If realtime flag is set then must have realtime data.
|
|
*/
|
|
if ((mask & XFS_AT_XFLAGS) &&
|
|
(vap->va_xflags & XFS_XFLAG_REALTIME)) {
|
|
if ((mp->m_sb.sb_rblocks == 0) ||
|
|
(mp->m_sb.sb_rextsize == 0) ||
|
|
(ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
|
|
code = XFS_ERROR(EINVAL);
|
|
goto error_return;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Can't modify an immutable/append-only file unless
|
|
* we have appropriate permission.
|
|
*/
|
|
if ((mask & XFS_AT_XFLAGS) &&
|
|
(ip->i_d.di_flags &
|
|
(XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
|
|
(vap->va_xflags &
|
|
(XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
|
|
!capable(CAP_LINUX_IMMUTABLE)) {
|
|
code = XFS_ERROR(EPERM);
|
|
goto error_return;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Now we can make the changes. Before we join the inode
|
|
* to the transaction, if XFS_AT_SIZE is set then take care of
|
|
* the part of the truncation that must be done without the
|
|
* inode lock. This needs to be done before joining the inode
|
|
* to the transaction, because the inode cannot be unlocked
|
|
* once it is a part of the transaction.
|
|
*/
|
|
if (mask & XFS_AT_SIZE) {
|
|
code = 0;
|
|
if ((vap->va_size > ip->i_size) &&
|
|
(flags & ATTR_NOSIZETOK) == 0) {
|
|
code = xfs_igrow_start(ip, vap->va_size, credp);
|
|
}
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
|
|
/*
|
|
* We are going to log the inode size change in this
|
|
* transaction so any previous writes that are beyond the on
|
|
* disk EOF and the new EOF that have not been written out need
|
|
* to be written here. If we do not write the data out, we
|
|
* expose ourselves to the null files problem.
|
|
*
|
|
* Only flush from the on disk size to the smaller of the in
|
|
* memory file size or the new size as that's the range we
|
|
* really care about here and prevents waiting for other data
|
|
* not within the range we care about here.
|
|
*/
|
|
if (!code &&
|
|
(ip->i_size != ip->i_d.di_size) &&
|
|
(vap->va_size > ip->i_d.di_size)) {
|
|
code = xfs_flush_pages(ip,
|
|
ip->i_d.di_size, vap->va_size,
|
|
XFS_B_ASYNC, FI_NONE);
|
|
}
|
|
|
|
/* wait for all I/O to complete */
|
|
vn_iowait(ip);
|
|
|
|
if (!code)
|
|
code = xfs_itruncate_data(ip, vap->va_size);
|
|
if (code) {
|
|
ASSERT(tp == NULL);
|
|
lock_flags &= ~XFS_ILOCK_EXCL;
|
|
ASSERT(lock_flags == XFS_IOLOCK_EXCL);
|
|
goto error_return;
|
|
}
|
|
tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_SIZE);
|
|
if ((code = xfs_trans_reserve(tp, 0,
|
|
XFS_ITRUNCATE_LOG_RES(mp), 0,
|
|
XFS_TRANS_PERM_LOG_RES,
|
|
XFS_ITRUNCATE_LOG_COUNT))) {
|
|
xfs_trans_cancel(tp, 0);
|
|
if (need_iolock)
|
|
xfs_iunlock(ip, XFS_IOLOCK_EXCL);
|
|
return code;
|
|
}
|
|
commit_flags = XFS_TRANS_RELEASE_LOG_RES;
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
}
|
|
|
|
if (tp) {
|
|
xfs_trans_ijoin(tp, ip, lock_flags);
|
|
xfs_trans_ihold(tp, ip);
|
|
}
|
|
|
|
/* determine whether mandatory locking mode changes */
|
|
mandlock_before = MANDLOCK(vp, ip->i_d.di_mode);
|
|
|
|
/*
|
|
* Truncate file. Must have write permission and not be a directory.
|
|
*/
|
|
if (mask & XFS_AT_SIZE) {
|
|
if (vap->va_size > ip->i_size) {
|
|
xfs_igrow_finish(tp, ip, vap->va_size,
|
|
!(flags & ATTR_DMI));
|
|
} else if ((vap->va_size <= ip->i_size) ||
|
|
((vap->va_size == 0) && ip->i_d.di_nextents)) {
|
|
/*
|
|
* signal a sync transaction unless
|
|
* we're truncating an already unlinked
|
|
* file on a wsync filesystem
|
|
*/
|
|
code = xfs_itruncate_finish(&tp, ip,
|
|
(xfs_fsize_t)vap->va_size,
|
|
XFS_DATA_FORK,
|
|
((ip->i_d.di_nlink != 0 ||
|
|
!(mp->m_flags & XFS_MOUNT_WSYNC))
|
|
? 1 : 0));
|
|
if (code)
|
|
goto abort_return;
|
|
/*
|
|
* Truncated "down", so we're removing references
|
|
* to old data here - if we now delay flushing for
|
|
* a long time, we expose ourselves unduly to the
|
|
* notorious NULL files problem. So, we mark this
|
|
* vnode and flush it when the file is closed, and
|
|
* do not wait the usual (long) time for writeout.
|
|
*/
|
|
xfs_iflags_set(ip, XFS_ITRUNCATED);
|
|
}
|
|
/*
|
|
* Have to do this even if the file's size doesn't change.
|
|
*/
|
|
timeflags |= XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG;
|
|
}
|
|
|
|
/*
|
|
* Change file access modes.
|
|
*/
|
|
if (mask & XFS_AT_MODE) {
|
|
ip->i_d.di_mode &= S_IFMT;
|
|
ip->i_d.di_mode |= vap->va_mode & ~S_IFMT;
|
|
|
|
xfs_trans_log_inode (tp, ip, XFS_ILOG_CORE);
|
|
timeflags |= XFS_ICHGTIME_CHG;
|
|
}
|
|
|
|
/*
|
|
* Change file ownership. Must be the owner or privileged.
|
|
* If the system was configured with the "restricted_chown"
|
|
* option, the owner is not permitted to give away the file,
|
|
* and can change the group id only to a group of which he
|
|
* or she is a member.
|
|
*/
|
|
if (mask & (XFS_AT_UID|XFS_AT_GID|XFS_AT_PROJID)) {
|
|
/*
|
|
* CAP_FSETID overrides the following restrictions:
|
|
*
|
|
* The set-user-ID and set-group-ID bits of a file will be
|
|
* cleared upon successful return from chown()
|
|
*/
|
|
if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
|
|
!capable(CAP_FSETID)) {
|
|
ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
|
|
}
|
|
|
|
/*
|
|
* Change the ownerships and register quota modifications
|
|
* in the transaction.
|
|
*/
|
|
if (iuid != uid) {
|
|
if (XFS_IS_UQUOTA_ON(mp)) {
|
|
ASSERT(mask & XFS_AT_UID);
|
|
ASSERT(udqp);
|
|
olddquot1 = XFS_QM_DQVOPCHOWN(mp, tp, ip,
|
|
&ip->i_udquot, udqp);
|
|
}
|
|
ip->i_d.di_uid = uid;
|
|
}
|
|
if (igid != gid) {
|
|
if (XFS_IS_GQUOTA_ON(mp)) {
|
|
ASSERT(!XFS_IS_PQUOTA_ON(mp));
|
|
ASSERT(mask & XFS_AT_GID);
|
|
ASSERT(gdqp);
|
|
olddquot2 = XFS_QM_DQVOPCHOWN(mp, tp, ip,
|
|
&ip->i_gdquot, gdqp);
|
|
}
|
|
ip->i_d.di_gid = gid;
|
|
}
|
|
if (iprojid != projid) {
|
|
if (XFS_IS_PQUOTA_ON(mp)) {
|
|
ASSERT(!XFS_IS_GQUOTA_ON(mp));
|
|
ASSERT(mask & XFS_AT_PROJID);
|
|
ASSERT(gdqp);
|
|
olddquot2 = XFS_QM_DQVOPCHOWN(mp, tp, ip,
|
|
&ip->i_gdquot, gdqp);
|
|
}
|
|
ip->i_d.di_projid = projid;
|
|
/*
|
|
* We may have to rev the inode as well as
|
|
* the superblock version number since projids didn't
|
|
* exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
|
|
*/
|
|
if (ip->i_d.di_version == XFS_DINODE_VERSION_1)
|
|
xfs_bump_ino_vers2(tp, ip);
|
|
}
|
|
|
|
xfs_trans_log_inode (tp, ip, XFS_ILOG_CORE);
|
|
timeflags |= XFS_ICHGTIME_CHG;
|
|
}
|
|
|
|
|
|
/*
|
|
* Change file access or modified times.
|
|
*/
|
|
if (mask & (XFS_AT_ATIME|XFS_AT_MTIME)) {
|
|
if (mask & XFS_AT_ATIME) {
|
|
ip->i_d.di_atime.t_sec = vap->va_atime.tv_sec;
|
|
ip->i_d.di_atime.t_nsec = vap->va_atime.tv_nsec;
|
|
ip->i_update_core = 1;
|
|
timeflags &= ~XFS_ICHGTIME_ACC;
|
|
}
|
|
if (mask & XFS_AT_MTIME) {
|
|
ip->i_d.di_mtime.t_sec = vap->va_mtime.tv_sec;
|
|
ip->i_d.di_mtime.t_nsec = vap->va_mtime.tv_nsec;
|
|
timeflags &= ~XFS_ICHGTIME_MOD;
|
|
timeflags |= XFS_ICHGTIME_CHG;
|
|
}
|
|
if (tp && (flags & ATTR_UTIME))
|
|
xfs_trans_log_inode (tp, ip, XFS_ILOG_CORE);
|
|
}
|
|
|
|
/*
|
|
* Change XFS-added attributes.
|
|
*/
|
|
if (mask & (XFS_AT_EXTSIZE|XFS_AT_XFLAGS)) {
|
|
if (mask & XFS_AT_EXTSIZE) {
|
|
/*
|
|
* Converting bytes to fs blocks.
|
|
*/
|
|
ip->i_d.di_extsize = vap->va_extsize >>
|
|
mp->m_sb.sb_blocklog;
|
|
}
|
|
if (mask & XFS_AT_XFLAGS) {
|
|
uint di_flags;
|
|
|
|
/* can't set PREALLOC this way, just preserve it */
|
|
di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
|
|
if (vap->va_xflags & XFS_XFLAG_IMMUTABLE)
|
|
di_flags |= XFS_DIFLAG_IMMUTABLE;
|
|
if (vap->va_xflags & XFS_XFLAG_APPEND)
|
|
di_flags |= XFS_DIFLAG_APPEND;
|
|
if (vap->va_xflags & XFS_XFLAG_SYNC)
|
|
di_flags |= XFS_DIFLAG_SYNC;
|
|
if (vap->va_xflags & XFS_XFLAG_NOATIME)
|
|
di_flags |= XFS_DIFLAG_NOATIME;
|
|
if (vap->va_xflags & XFS_XFLAG_NODUMP)
|
|
di_flags |= XFS_DIFLAG_NODUMP;
|
|
if (vap->va_xflags & XFS_XFLAG_PROJINHERIT)
|
|
di_flags |= XFS_DIFLAG_PROJINHERIT;
|
|
if (vap->va_xflags & XFS_XFLAG_NODEFRAG)
|
|
di_flags |= XFS_DIFLAG_NODEFRAG;
|
|
if (vap->va_xflags & XFS_XFLAG_FILESTREAM)
|
|
di_flags |= XFS_DIFLAG_FILESTREAM;
|
|
if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
|
|
if (vap->va_xflags & XFS_XFLAG_RTINHERIT)
|
|
di_flags |= XFS_DIFLAG_RTINHERIT;
|
|
if (vap->va_xflags & XFS_XFLAG_NOSYMLINKS)
|
|
di_flags |= XFS_DIFLAG_NOSYMLINKS;
|
|
if (vap->va_xflags & XFS_XFLAG_EXTSZINHERIT)
|
|
di_flags |= XFS_DIFLAG_EXTSZINHERIT;
|
|
} else if ((ip->i_d.di_mode & S_IFMT) == S_IFREG) {
|
|
if (vap->va_xflags & XFS_XFLAG_REALTIME)
|
|
di_flags |= XFS_DIFLAG_REALTIME;
|
|
if (vap->va_xflags & XFS_XFLAG_EXTSIZE)
|
|
di_flags |= XFS_DIFLAG_EXTSIZE;
|
|
}
|
|
ip->i_d.di_flags = di_flags;
|
|
}
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
|
|
timeflags |= XFS_ICHGTIME_CHG;
|
|
}
|
|
|
|
/*
|
|
* Change file inode change time only if XFS_AT_CTIME set
|
|
* AND we have been called by a DMI function.
|
|
*/
|
|
|
|
if ( (flags & ATTR_DMI) && (mask & XFS_AT_CTIME) ) {
|
|
ip->i_d.di_ctime.t_sec = vap->va_ctime.tv_sec;
|
|
ip->i_d.di_ctime.t_nsec = vap->va_ctime.tv_nsec;
|
|
ip->i_update_core = 1;
|
|
timeflags &= ~XFS_ICHGTIME_CHG;
|
|
}
|
|
|
|
/*
|
|
* Send out timestamp changes that need to be set to the
|
|
* current time. Not done when called by a DMI function.
|
|
*/
|
|
if (timeflags && !(flags & ATTR_DMI))
|
|
xfs_ichgtime(ip, timeflags);
|
|
|
|
XFS_STATS_INC(xs_ig_attrchg);
|
|
|
|
/*
|
|
* If this is a synchronous mount, make sure that the
|
|
* transaction goes to disk before returning to the user.
|
|
* This is slightly sub-optimal in that truncates require
|
|
* two sync transactions instead of one for wsync filesystems.
|
|
* One for the truncate and one for the timestamps since we
|
|
* don't want to change the timestamps unless we're sure the
|
|
* truncate worked. Truncates are less than 1% of the laddis
|
|
* mix so this probably isn't worth the trouble to optimize.
|
|
*/
|
|
code = 0;
|
|
if (tp) {
|
|
if (mp->m_flags & XFS_MOUNT_WSYNC)
|
|
xfs_trans_set_sync(tp);
|
|
|
|
code = xfs_trans_commit(tp, commit_flags);
|
|
}
|
|
|
|
/*
|
|
* If the (regular) file's mandatory locking mode changed, then
|
|
* notify the vnode. We do this under the inode lock to prevent
|
|
* racing calls to vop_vnode_change.
|
|
*/
|
|
mandlock_after = MANDLOCK(vp, ip->i_d.di_mode);
|
|
|
|
xfs_iunlock(ip, lock_flags);
|
|
|
|
/*
|
|
* Release any dquot(s) the inode had kept before chown.
|
|
*/
|
|
XFS_QM_DQRELE(mp, olddquot1);
|
|
XFS_QM_DQRELE(mp, olddquot2);
|
|
XFS_QM_DQRELE(mp, udqp);
|
|
XFS_QM_DQRELE(mp, gdqp);
|
|
|
|
if (code) {
|
|
return code;
|
|
}
|
|
|
|
if (DM_EVENT_ENABLED(ip, DM_EVENT_ATTRIBUTE) &&
|
|
!(flags & ATTR_DMI)) {
|
|
(void) XFS_SEND_NAMESP(mp, DM_EVENT_ATTRIBUTE, vp, DM_RIGHT_NULL,
|
|
NULL, DM_RIGHT_NULL, NULL, NULL,
|
|
0, 0, AT_DELAY_FLAG(flags));
|
|
}
|
|
return 0;
|
|
|
|
abort_return:
|
|
commit_flags |= XFS_TRANS_ABORT;
|
|
/* FALLTHROUGH */
|
|
error_return:
|
|
XFS_QM_DQRELE(mp, udqp);
|
|
XFS_QM_DQRELE(mp, gdqp);
|
|
if (tp) {
|
|
xfs_trans_cancel(tp, commit_flags);
|
|
}
|
|
if (lock_flags != 0) {
|
|
xfs_iunlock(ip, lock_flags);
|
|
}
|
|
return code;
|
|
}
|
|
|
|
/*
|
|
* The maximum pathlen is 1024 bytes. Since the minimum file system
|
|
* blocksize is 512 bytes, we can get a max of 2 extents back from
|
|
* bmapi.
|
|
*/
|
|
#define SYMLINK_MAPS 2
|
|
|
|
STATIC int
|
|
xfs_readlink_bmap(
|
|
xfs_inode_t *ip,
|
|
char *link)
|
|
{
|
|
xfs_mount_t *mp = ip->i_mount;
|
|
int pathlen = ip->i_d.di_size;
|
|
int nmaps = SYMLINK_MAPS;
|
|
xfs_bmbt_irec_t mval[SYMLINK_MAPS];
|
|
xfs_daddr_t d;
|
|
int byte_cnt;
|
|
int n;
|
|
xfs_buf_t *bp;
|
|
int error = 0;
|
|
|
|
error = xfs_bmapi(NULL, ip, 0, XFS_B_TO_FSB(mp, pathlen), 0, NULL, 0,
|
|
mval, &nmaps, NULL, NULL);
|
|
if (error)
|
|
goto out;
|
|
|
|
for (n = 0; n < nmaps; n++) {
|
|
d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock);
|
|
byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount);
|
|
|
|
bp = xfs_buf_read(mp->m_ddev_targp, d, BTOBB(byte_cnt), 0);
|
|
error = XFS_BUF_GETERROR(bp);
|
|
if (error) {
|
|
xfs_ioerror_alert("xfs_readlink",
|
|
ip->i_mount, bp, XFS_BUF_ADDR(bp));
|
|
xfs_buf_relse(bp);
|
|
goto out;
|
|
}
|
|
if (pathlen < byte_cnt)
|
|
byte_cnt = pathlen;
|
|
pathlen -= byte_cnt;
|
|
|
|
memcpy(link, XFS_BUF_PTR(bp), byte_cnt);
|
|
xfs_buf_relse(bp);
|
|
}
|
|
|
|
link[ip->i_d.di_size] = '\0';
|
|
error = 0;
|
|
|
|
out:
|
|
return error;
|
|
}
|
|
|
|
int
|
|
xfs_readlink(
|
|
xfs_inode_t *ip,
|
|
char *link)
|
|
{
|
|
xfs_mount_t *mp = ip->i_mount;
|
|
int pathlen;
|
|
int error = 0;
|
|
|
|
xfs_itrace_entry(ip);
|
|
|
|
if (XFS_FORCED_SHUTDOWN(mp))
|
|
return XFS_ERROR(EIO);
|
|
|
|
xfs_ilock(ip, XFS_ILOCK_SHARED);
|
|
|
|
ASSERT((ip->i_d.di_mode & S_IFMT) == S_IFLNK);
|
|
ASSERT(ip->i_d.di_size <= MAXPATHLEN);
|
|
|
|
pathlen = ip->i_d.di_size;
|
|
if (!pathlen)
|
|
goto out;
|
|
|
|
if (ip->i_df.if_flags & XFS_IFINLINE) {
|
|
memcpy(link, ip->i_df.if_u1.if_data, pathlen);
|
|
link[pathlen] = '\0';
|
|
} else {
|
|
error = xfs_readlink_bmap(ip, link);
|
|
}
|
|
|
|
out:
|
|
xfs_iunlock(ip, XFS_ILOCK_SHARED);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* xfs_fsync
|
|
*
|
|
* This is called to sync the inode and its data out to disk.
|
|
* We need to hold the I/O lock while flushing the data, and
|
|
* the inode lock while flushing the inode. The inode lock CANNOT
|
|
* be held while flushing the data, so acquire after we're done
|
|
* with that.
|
|
*/
|
|
int
|
|
xfs_fsync(
|
|
xfs_inode_t *ip,
|
|
int flag,
|
|
xfs_off_t start,
|
|
xfs_off_t stop)
|
|
{
|
|
xfs_trans_t *tp;
|
|
int error;
|
|
int log_flushed = 0, changed = 1;
|
|
|
|
xfs_itrace_entry(ip);
|
|
|
|
ASSERT(start >= 0 && stop >= -1);
|
|
|
|
if (XFS_FORCED_SHUTDOWN(ip->i_mount))
|
|
return XFS_ERROR(EIO);
|
|
|
|
if (flag & FSYNC_DATA)
|
|
filemap_fdatawait(vn_to_inode(XFS_ITOV(ip))->i_mapping);
|
|
|
|
/*
|
|
* We always need to make sure that the required inode state
|
|
* is safe on disk. The vnode might be clean but because
|
|
* of committed transactions that haven't hit the disk yet.
|
|
* Likewise, there could be unflushed non-transactional
|
|
* changes to the inode core that have to go to disk.
|
|
*
|
|
* The following code depends on one assumption: that
|
|
* any transaction that changes an inode logs the core
|
|
* because it has to change some field in the inode core
|
|
* (typically nextents or nblocks). That assumption
|
|
* implies that any transactions against an inode will
|
|
* catch any non-transactional updates. If inode-altering
|
|
* transactions exist that violate this assumption, the
|
|
* code breaks. Right now, it figures that if the involved
|
|
* update_* field is clear and the inode is unpinned, the
|
|
* inode is clean. Either it's been flushed or it's been
|
|
* committed and the commit has hit the disk unpinning the inode.
|
|
* (Note that xfs_inode_item_format() called at commit clears
|
|
* the update_* fields.)
|
|
*/
|
|
xfs_ilock(ip, XFS_ILOCK_SHARED);
|
|
|
|
/* If we are flushing data then we care about update_size
|
|
* being set, otherwise we care about update_core
|
|
*/
|
|
if ((flag & FSYNC_DATA) ?
|
|
(ip->i_update_size == 0) :
|
|
(ip->i_update_core == 0)) {
|
|
/*
|
|
* Timestamps/size haven't changed since last inode
|
|
* flush or inode transaction commit. That means
|
|
* either nothing got written or a transaction
|
|
* committed which caught the updates. If the
|
|
* latter happened and the transaction hasn't
|
|
* hit the disk yet, the inode will be still
|
|
* be pinned. If it is, force the log.
|
|
*/
|
|
|
|
xfs_iunlock(ip, XFS_ILOCK_SHARED);
|
|
|
|
if (xfs_ipincount(ip)) {
|
|
_xfs_log_force(ip->i_mount, (xfs_lsn_t)0,
|
|
XFS_LOG_FORCE |
|
|
((flag & FSYNC_WAIT)
|
|
? XFS_LOG_SYNC : 0),
|
|
&log_flushed);
|
|
} else {
|
|
/*
|
|
* If the inode is not pinned and nothing
|
|
* has changed we don't need to flush the
|
|
* cache.
|
|
*/
|
|
changed = 0;
|
|
}
|
|
error = 0;
|
|
} else {
|
|
/*
|
|
* Kick off a transaction to log the inode
|
|
* core to get the updates. Make it
|
|
* sync if FSYNC_WAIT is passed in (which
|
|
* is done by everybody but specfs). The
|
|
* sync transaction will also force the log.
|
|
*/
|
|
xfs_iunlock(ip, XFS_ILOCK_SHARED);
|
|
tp = xfs_trans_alloc(ip->i_mount, XFS_TRANS_FSYNC_TS);
|
|
if ((error = xfs_trans_reserve(tp, 0,
|
|
XFS_FSYNC_TS_LOG_RES(ip->i_mount),
|
|
0, 0, 0))) {
|
|
xfs_trans_cancel(tp, 0);
|
|
return error;
|
|
}
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
|
|
/*
|
|
* Note - it's possible that we might have pushed
|
|
* ourselves out of the way during trans_reserve
|
|
* which would flush the inode. But there's no
|
|
* guarantee that the inode buffer has actually
|
|
* gone out yet (it's delwri). Plus the buffer
|
|
* could be pinned anyway if it's part of an
|
|
* inode in another recent transaction. So we
|
|
* play it safe and fire off the transaction anyway.
|
|
*/
|
|
xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
|
|
xfs_trans_ihold(tp, ip);
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
|
|
if (flag & FSYNC_WAIT)
|
|
xfs_trans_set_sync(tp);
|
|
error = _xfs_trans_commit(tp, 0, &log_flushed);
|
|
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
}
|
|
|
|
if ((ip->i_mount->m_flags & XFS_MOUNT_BARRIER) && changed) {
|
|
/*
|
|
* If the log write didn't issue an ordered tag we need
|
|
* to flush the disk cache for the data device now.
|
|
*/
|
|
if (!log_flushed)
|
|
xfs_blkdev_issue_flush(ip->i_mount->m_ddev_targp);
|
|
|
|
/*
|
|
* If this inode is on the RT dev we need to flush that
|
|
* cache as well.
|
|
*/
|
|
if (XFS_IS_REALTIME_INODE(ip))
|
|
xfs_blkdev_issue_flush(ip->i_mount->m_rtdev_targp);
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* 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,
|
|
int flags)
|
|
{
|
|
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;
|
|
int use_iolock = (flags & XFS_FREE_EOF_LOCK);
|
|
|
|
/*
|
|
* 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)ip->i_size));
|
|
last_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp));
|
|
map_len = last_fsb - end_fsb;
|
|
if (map_len <= 0)
|
|
return 0;
|
|
|
|
nimaps = 1;
|
|
xfs_ilock(ip, XFS_ILOCK_SHARED);
|
|
error = xfs_bmapi(NULL, ip, end_fsb, map_len, 0,
|
|
NULL, 0, &imap, &nimaps, NULL, NULL);
|
|
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.
|
|
*/
|
|
if ((error = XFS_QM_DQATTACH(mp, ip, 0)))
|
|
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);
|
|
|
|
/*
|
|
* Do the xfs_itruncate_start() call before
|
|
* reserving any log space because
|
|
* itruncate_start will call into the buffer
|
|
* cache and we can't
|
|
* do that within a transaction.
|
|
*/
|
|
if (use_iolock)
|
|
xfs_ilock(ip, XFS_IOLOCK_EXCL);
|
|
error = xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE,
|
|
ip->i_size);
|
|
if (error) {
|
|
xfs_trans_cancel(tp, 0);
|
|
if (use_iolock)
|
|
xfs_iunlock(ip, XFS_IOLOCK_EXCL);
|
|
return error;
|
|
}
|
|
|
|
error = xfs_trans_reserve(tp, 0,
|
|
XFS_ITRUNCATE_LOG_RES(mp),
|
|
0, XFS_TRANS_PERM_LOG_RES,
|
|
XFS_ITRUNCATE_LOG_COUNT);
|
|
if (error) {
|
|
ASSERT(XFS_FORCED_SHUTDOWN(mp));
|
|
xfs_trans_cancel(tp, 0);
|
|
xfs_iunlock(ip, XFS_IOLOCK_EXCL);
|
|
return error;
|
|
}
|
|
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
xfs_trans_ijoin(tp, ip,
|
|
XFS_IOLOCK_EXCL |
|
|
XFS_ILOCK_EXCL);
|
|
xfs_trans_ihold(tp, ip);
|
|
|
|
error = xfs_itruncate_finish(&tp, ip,
|
|
ip->i_size,
|
|
XFS_DATA_FORK,
|
|
0);
|
|
/*
|
|
* If we get an error at this point we
|
|
* simply don't bother truncating the file.
|
|
*/
|
|
if (error) {
|
|
xfs_trans_cancel(tp,
|
|
(XFS_TRANS_RELEASE_LOG_RES |
|
|
XFS_TRANS_ABORT));
|
|
} else {
|
|
error = xfs_trans_commit(tp,
|
|
XFS_TRANS_RELEASE_LOG_RES);
|
|
}
|
|
xfs_iunlock(ip, (use_iolock ? (XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL)
|
|
: XFS_ILOCK_EXCL));
|
|
}
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Free a symlink that has blocks associated with it.
|
|
*/
|
|
STATIC int
|
|
xfs_inactive_symlink_rmt(
|
|
xfs_inode_t *ip,
|
|
xfs_trans_t **tpp)
|
|
{
|
|
xfs_buf_t *bp;
|
|
int committed;
|
|
int done;
|
|
int error;
|
|
xfs_fsblock_t first_block;
|
|
xfs_bmap_free_t free_list;
|
|
int i;
|
|
xfs_mount_t *mp;
|
|
xfs_bmbt_irec_t mval[SYMLINK_MAPS];
|
|
int nmaps;
|
|
xfs_trans_t *ntp;
|
|
int size;
|
|
xfs_trans_t *tp;
|
|
|
|
tp = *tpp;
|
|
mp = ip->i_mount;
|
|
ASSERT(ip->i_d.di_size > XFS_IFORK_DSIZE(ip));
|
|
/*
|
|
* We're freeing a symlink that has some
|
|
* blocks allocated to it. Free the
|
|
* blocks here. We know that we've got
|
|
* either 1 or 2 extents and that we can
|
|
* free them all in one bunmapi call.
|
|
*/
|
|
ASSERT(ip->i_d.di_nextents > 0 && ip->i_d.di_nextents <= 2);
|
|
if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0,
|
|
XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) {
|
|
ASSERT(XFS_FORCED_SHUTDOWN(mp));
|
|
xfs_trans_cancel(tp, 0);
|
|
*tpp = NULL;
|
|
return error;
|
|
}
|
|
/*
|
|
* Lock the inode, fix the size, and join it to the transaction.
|
|
* Hold it so in the normal path, we still have it locked for
|
|
* the second transaction. In the error paths we need it
|
|
* held so the cancel won't rele it, see below.
|
|
*/
|
|
xfs_ilock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
|
|
size = (int)ip->i_d.di_size;
|
|
ip->i_d.di_size = 0;
|
|
xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
|
|
xfs_trans_ihold(tp, ip);
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
|
|
/*
|
|
* Find the block(s) so we can inval and unmap them.
|
|
*/
|
|
done = 0;
|
|
XFS_BMAP_INIT(&free_list, &first_block);
|
|
nmaps = ARRAY_SIZE(mval);
|
|
if ((error = xfs_bmapi(tp, ip, 0, XFS_B_TO_FSB(mp, size),
|
|
XFS_BMAPI_METADATA, &first_block, 0, mval, &nmaps,
|
|
&free_list, NULL)))
|
|
goto error0;
|
|
/*
|
|
* Invalidate the block(s).
|
|
*/
|
|
for (i = 0; i < nmaps; i++) {
|
|
bp = xfs_trans_get_buf(tp, mp->m_ddev_targp,
|
|
XFS_FSB_TO_DADDR(mp, mval[i].br_startblock),
|
|
XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0);
|
|
xfs_trans_binval(tp, bp);
|
|
}
|
|
/*
|
|
* Unmap the dead block(s) to the free_list.
|
|
*/
|
|
if ((error = xfs_bunmapi(tp, ip, 0, size, XFS_BMAPI_METADATA, nmaps,
|
|
&first_block, &free_list, NULL, &done)))
|
|
goto error1;
|
|
ASSERT(done);
|
|
/*
|
|
* Commit the first transaction. This logs the EFI and the inode.
|
|
*/
|
|
if ((error = xfs_bmap_finish(&tp, &free_list, &committed)))
|
|
goto error1;
|
|
/*
|
|
* The transaction must have been committed, since there were
|
|
* actually extents freed by xfs_bunmapi. See xfs_bmap_finish.
|
|
* The new tp has the extent freeing and EFDs.
|
|
*/
|
|
ASSERT(committed);
|
|
/*
|
|
* The first xact was committed, so add the inode to the new one.
|
|
* Mark it dirty so it will be logged and moved forward in the log as
|
|
* part of every commit.
|
|
*/
|
|
xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
|
|
xfs_trans_ihold(tp, ip);
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
|
|
/*
|
|
* Get a new, empty transaction to return to our caller.
|
|
*/
|
|
ntp = xfs_trans_dup(tp);
|
|
/*
|
|
* Commit the transaction containing extent freeing and EFDs.
|
|
* If we get an error on the commit here or on the reserve below,
|
|
* we need to unlock the inode since the new transaction doesn't
|
|
* have the inode attached.
|
|
*/
|
|
error = xfs_trans_commit(tp, 0);
|
|
tp = ntp;
|
|
if (error) {
|
|
ASSERT(XFS_FORCED_SHUTDOWN(mp));
|
|
goto error0;
|
|
}
|
|
/*
|
|
* Remove the memory for extent descriptions (just bookkeeping).
|
|
*/
|
|
if (ip->i_df.if_bytes)
|
|
xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK);
|
|
ASSERT(ip->i_df.if_bytes == 0);
|
|
/*
|
|
* Put an itruncate log reservation in the new transaction
|
|
* for our caller.
|
|
*/
|
|
if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0,
|
|
XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) {
|
|
ASSERT(XFS_FORCED_SHUTDOWN(mp));
|
|
goto error0;
|
|
}
|
|
/*
|
|
* Return with the inode locked but not joined to the transaction.
|
|
*/
|
|
*tpp = tp;
|
|
return 0;
|
|
|
|
error1:
|
|
xfs_bmap_cancel(&free_list);
|
|
error0:
|
|
/*
|
|
* Have to come here with the inode locked and either
|
|
* (held and in the transaction) or (not in the transaction).
|
|
* If the inode isn't held then cancel would iput it, but
|
|
* that's wrong since this is inactive and the vnode ref
|
|
* count is 0 already.
|
|
* Cancel won't do anything to the inode if held, but it still
|
|
* needs to be locked until the cancel is done, if it was
|
|
* joined to the transaction.
|
|
*/
|
|
xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
|
|
xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
|
|
*tpp = NULL;
|
|
return error;
|
|
|
|
}
|
|
|
|
STATIC int
|
|
xfs_inactive_symlink_local(
|
|
xfs_inode_t *ip,
|
|
xfs_trans_t **tpp)
|
|
{
|
|
int error;
|
|
|
|
ASSERT(ip->i_d.di_size <= XFS_IFORK_DSIZE(ip));
|
|
/*
|
|
* We're freeing a symlink which fit into
|
|
* the inode. Just free the memory used
|
|
* to hold the old symlink.
|
|
*/
|
|
error = xfs_trans_reserve(*tpp, 0,
|
|
XFS_ITRUNCATE_LOG_RES(ip->i_mount),
|
|
0, XFS_TRANS_PERM_LOG_RES,
|
|
XFS_ITRUNCATE_LOG_COUNT);
|
|
|
|
if (error) {
|
|
xfs_trans_cancel(*tpp, 0);
|
|
*tpp = NULL;
|
|
return error;
|
|
}
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
|
|
|
|
/*
|
|
* Zero length symlinks _can_ exist.
|
|
*/
|
|
if (ip->i_df.if_bytes > 0) {
|
|
xfs_idata_realloc(ip,
|
|
-(ip->i_df.if_bytes),
|
|
XFS_DATA_FORK);
|
|
ASSERT(ip->i_df.if_bytes == 0);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_inactive_attrs(
|
|
xfs_inode_t *ip,
|
|
xfs_trans_t **tpp)
|
|
{
|
|
xfs_trans_t *tp;
|
|
int error;
|
|
xfs_mount_t *mp;
|
|
|
|
ASSERT(ismrlocked(&ip->i_iolock, MR_UPDATE));
|
|
tp = *tpp;
|
|
mp = ip->i_mount;
|
|
ASSERT(ip->i_d.di_forkoff != 0);
|
|
xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
|
|
error = xfs_attr_inactive(ip);
|
|
if (error) {
|
|
*tpp = NULL;
|
|
xfs_iunlock(ip, XFS_IOLOCK_EXCL);
|
|
return error; /* goto out */
|
|
}
|
|
|
|
tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE);
|
|
error = xfs_trans_reserve(tp, 0,
|
|
XFS_IFREE_LOG_RES(mp),
|
|
0, XFS_TRANS_PERM_LOG_RES,
|
|
XFS_INACTIVE_LOG_COUNT);
|
|
if (error) {
|
|
ASSERT(XFS_FORCED_SHUTDOWN(mp));
|
|
xfs_trans_cancel(tp, 0);
|
|
*tpp = NULL;
|
|
xfs_iunlock(ip, XFS_IOLOCK_EXCL);
|
|
return error;
|
|
}
|
|
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
|
|
xfs_trans_ihold(tp, ip);
|
|
xfs_idestroy_fork(ip, XFS_ATTR_FORK);
|
|
|
|
ASSERT(ip->i_d.di_anextents == 0);
|
|
|
|
*tpp = tp;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
xfs_release(
|
|
xfs_inode_t *ip)
|
|
{
|
|
bhv_vnode_t *vp = XFS_ITOV(ip);
|
|
xfs_mount_t *mp = ip->i_mount;
|
|
int error;
|
|
|
|
if (!VN_ISREG(vp) || (ip->i_d.di_mode == 0))
|
|
return 0;
|
|
|
|
/* If this is a read-only mount, don't do this (would generate I/O) */
|
|
if (mp->m_flags & XFS_MOUNT_RDONLY)
|
|
return 0;
|
|
|
|
if (!XFS_FORCED_SHUTDOWN(mp)) {
|
|
int truncated;
|
|
|
|
/*
|
|
* If we are using filestreams, and we have an unlinked
|
|
* file that we are processing the last close on, then nothing
|
|
* will be able to reopen and write to this file. Purge this
|
|
* inode from the filestreams cache so that it doesn't delay
|
|
* teardown of the inode.
|
|
*/
|
|
if ((ip->i_d.di_nlink == 0) && xfs_inode_is_filestream(ip))
|
|
xfs_filestream_deassociate(ip);
|
|
|
|
/*
|
|
* If we previously truncated this file and removed old data
|
|
* in the process, we want to initiate "early" writeout on
|
|
* the last close. This is an attempt to combat the notorious
|
|
* NULL files problem which is particularly noticable from a
|
|
* truncate down, buffered (re-)write (delalloc), followed by
|
|
* a crash. What we are effectively doing here is
|
|
* significantly reducing the time window where we'd otherwise
|
|
* be exposed to that problem.
|
|
*/
|
|
truncated = xfs_iflags_test_and_clear(ip, XFS_ITRUNCATED);
|
|
if (truncated && VN_DIRTY(vp) && ip->i_delayed_blks > 0)
|
|
xfs_flush_pages(ip, 0, -1, XFS_B_ASYNC, FI_NONE);
|
|
}
|
|
|
|
#ifdef HAVE_REFCACHE
|
|
/* If we are in the NFS reference cache then don't do this now */
|
|
if (ip->i_refcache)
|
|
return 0;
|
|
#endif
|
|
|
|
if (ip->i_d.di_nlink != 0) {
|
|
if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) &&
|
|
((ip->i_size > 0) || (VN_CACHED(vp) > 0 ||
|
|
ip->i_delayed_blks > 0)) &&
|
|
(ip->i_df.if_flags & XFS_IFEXTENTS)) &&
|
|
(!(ip->i_d.di_flags &
|
|
(XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)))) {
|
|
error = xfs_free_eofblocks(mp, ip, XFS_FREE_EOF_LOCK);
|
|
if (error)
|
|
return error;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* xfs_inactive
|
|
*
|
|
* This is called when the vnode reference count for the vnode
|
|
* goes to zero. If the file has been unlinked, then it must
|
|
* now be truncated. Also, we clear all of the read-ahead state
|
|
* kept for the inode here since the file is now closed.
|
|
*/
|
|
int
|
|
xfs_inactive(
|
|
xfs_inode_t *ip)
|
|
{
|
|
bhv_vnode_t *vp = XFS_ITOV(ip);
|
|
xfs_bmap_free_t free_list;
|
|
xfs_fsblock_t first_block;
|
|
int committed;
|
|
xfs_trans_t *tp;
|
|
xfs_mount_t *mp;
|
|
int error;
|
|
int truncate;
|
|
|
|
xfs_itrace_entry(ip);
|
|
|
|
/*
|
|
* If the inode is already free, then there can be nothing
|
|
* to clean up here.
|
|
*/
|
|
if (ip->i_d.di_mode == 0 || VN_BAD(vp)) {
|
|
ASSERT(ip->i_df.if_real_bytes == 0);
|
|
ASSERT(ip->i_df.if_broot_bytes == 0);
|
|
return VN_INACTIVE_CACHE;
|
|
}
|
|
|
|
/*
|
|
* Only do a truncate if it's a regular file with
|
|
* some actual space in it. It's OK to look at the
|
|
* inode's fields without the lock because we're the
|
|
* only one with a reference to the inode.
|
|
*/
|
|
truncate = ((ip->i_d.di_nlink == 0) &&
|
|
((ip->i_d.di_size != 0) || (ip->i_size != 0) ||
|
|
(ip->i_d.di_nextents > 0) || (ip->i_delayed_blks > 0)) &&
|
|
((ip->i_d.di_mode & S_IFMT) == S_IFREG));
|
|
|
|
mp = ip->i_mount;
|
|
|
|
if (ip->i_d.di_nlink == 0 && DM_EVENT_ENABLED(ip, DM_EVENT_DESTROY)) {
|
|
(void) XFS_SEND_DESTROY(mp, vp, DM_RIGHT_NULL);
|
|
}
|
|
|
|
error = 0;
|
|
|
|
/* If this is a read-only mount, don't do this (would generate I/O) */
|
|
if (mp->m_flags & XFS_MOUNT_RDONLY)
|
|
goto out;
|
|
|
|
if (ip->i_d.di_nlink != 0) {
|
|
if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) &&
|
|
((ip->i_size > 0) || (VN_CACHED(vp) > 0 ||
|
|
ip->i_delayed_blks > 0)) &&
|
|
(ip->i_df.if_flags & XFS_IFEXTENTS) &&
|
|
(!(ip->i_d.di_flags &
|
|
(XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)) ||
|
|
(ip->i_delayed_blks != 0)))) {
|
|
error = xfs_free_eofblocks(mp, ip, XFS_FREE_EOF_LOCK);
|
|
if (error)
|
|
return VN_INACTIVE_CACHE;
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
ASSERT(ip->i_d.di_nlink == 0);
|
|
|
|
if ((error = XFS_QM_DQATTACH(mp, ip, 0)))
|
|
return VN_INACTIVE_CACHE;
|
|
|
|
tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE);
|
|
if (truncate) {
|
|
/*
|
|
* Do the xfs_itruncate_start() call before
|
|
* reserving any log space because itruncate_start
|
|
* will call into the buffer cache and we can't
|
|
* do that within a transaction.
|
|
*/
|
|
xfs_ilock(ip, XFS_IOLOCK_EXCL);
|
|
|
|
error = xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE, 0);
|
|
if (error) {
|
|
xfs_trans_cancel(tp, 0);
|
|
xfs_iunlock(ip, XFS_IOLOCK_EXCL);
|
|
return VN_INACTIVE_CACHE;
|
|
}
|
|
|
|
error = xfs_trans_reserve(tp, 0,
|
|
XFS_ITRUNCATE_LOG_RES(mp),
|
|
0, XFS_TRANS_PERM_LOG_RES,
|
|
XFS_ITRUNCATE_LOG_COUNT);
|
|
if (error) {
|
|
/* Don't call itruncate_cleanup */
|
|
ASSERT(XFS_FORCED_SHUTDOWN(mp));
|
|
xfs_trans_cancel(tp, 0);
|
|
xfs_iunlock(ip, XFS_IOLOCK_EXCL);
|
|
return VN_INACTIVE_CACHE;
|
|
}
|
|
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
|
|
xfs_trans_ihold(tp, ip);
|
|
|
|
/*
|
|
* normally, we have to run xfs_itruncate_finish sync.
|
|
* But if filesystem is wsync and we're in the inactive
|
|
* path, then we know that nlink == 0, and that the
|
|
* xaction that made nlink == 0 is permanently committed
|
|
* since xfs_remove runs as a synchronous transaction.
|
|
*/
|
|
error = xfs_itruncate_finish(&tp, ip, 0, XFS_DATA_FORK,
|
|
(!(mp->m_flags & XFS_MOUNT_WSYNC) ? 1 : 0));
|
|
|
|
if (error) {
|
|
xfs_trans_cancel(tp,
|
|
XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
|
|
xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
|
|
return VN_INACTIVE_CACHE;
|
|
}
|
|
} else if ((ip->i_d.di_mode & S_IFMT) == S_IFLNK) {
|
|
|
|
/*
|
|
* If we get an error while cleaning up a
|
|
* symlink we bail out.
|
|
*/
|
|
error = (ip->i_d.di_size > XFS_IFORK_DSIZE(ip)) ?
|
|
xfs_inactive_symlink_rmt(ip, &tp) :
|
|
xfs_inactive_symlink_local(ip, &tp);
|
|
|
|
if (error) {
|
|
ASSERT(tp == NULL);
|
|
return VN_INACTIVE_CACHE;
|
|
}
|
|
|
|
xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
|
|
xfs_trans_ihold(tp, ip);
|
|
} else {
|
|
error = xfs_trans_reserve(tp, 0,
|
|
XFS_IFREE_LOG_RES(mp),
|
|
0, XFS_TRANS_PERM_LOG_RES,
|
|
XFS_INACTIVE_LOG_COUNT);
|
|
if (error) {
|
|
ASSERT(XFS_FORCED_SHUTDOWN(mp));
|
|
xfs_trans_cancel(tp, 0);
|
|
return VN_INACTIVE_CACHE;
|
|
}
|
|
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
|
|
xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
|
|
xfs_trans_ihold(tp, ip);
|
|
}
|
|
|
|
/*
|
|
* If there are attributes associated with the file
|
|
* then blow them away now. The code calls a routine
|
|
* that recursively deconstructs the attribute fork.
|
|
* We need to just commit the current transaction
|
|
* because we can't use it for xfs_attr_inactive().
|
|
*/
|
|
if (ip->i_d.di_anextents > 0) {
|
|
error = xfs_inactive_attrs(ip, &tp);
|
|
/*
|
|
* If we got an error, the transaction is already
|
|
* cancelled, and the inode is unlocked. Just get out.
|
|
*/
|
|
if (error)
|
|
return VN_INACTIVE_CACHE;
|
|
} else if (ip->i_afp) {
|
|
xfs_idestroy_fork(ip, XFS_ATTR_FORK);
|
|
}
|
|
|
|
/*
|
|
* Free the inode.
|
|
*/
|
|
XFS_BMAP_INIT(&free_list, &first_block);
|
|
error = xfs_ifree(tp, ip, &free_list);
|
|
if (error) {
|
|
/*
|
|
* If we fail to free the inode, shut down. The cancel
|
|
* might do that, we need to make sure. Otherwise the
|
|
* inode might be lost for a long time or forever.
|
|
*/
|
|
if (!XFS_FORCED_SHUTDOWN(mp)) {
|
|
cmn_err(CE_NOTE,
|
|
"xfs_inactive: xfs_ifree() returned an error = %d on %s",
|
|
error, mp->m_fsname);
|
|
xfs_force_shutdown(mp, SHUTDOWN_META_IO_ERROR);
|
|
}
|
|
xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT);
|
|
} else {
|
|
/*
|
|
* Credit the quota account(s). The inode is gone.
|
|
*/
|
|
XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, XFS_TRANS_DQ_ICOUNT, -1);
|
|
|
|
/*
|
|
* Just ignore errors at this point. There is
|
|
* nothing we can do except to try to keep going.
|
|
*/
|
|
(void) xfs_bmap_finish(&tp, &free_list, &committed);
|
|
(void) xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
|
|
}
|
|
/*
|
|
* Release the dquots held by inode, if any.
|
|
*/
|
|
XFS_QM_DQDETACH(mp, ip);
|
|
|
|
xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
|
|
|
|
out:
|
|
return VN_INACTIVE_CACHE;
|
|
}
|
|
|
|
|
|
int
|
|
xfs_lookup(
|
|
xfs_inode_t *dp,
|
|
bhv_vname_t *dentry,
|
|
bhv_vnode_t **vpp)
|
|
{
|
|
xfs_inode_t *ip;
|
|
xfs_ino_t e_inum;
|
|
int error;
|
|
uint lock_mode;
|
|
|
|
xfs_itrace_entry(dp);
|
|
|
|
if (XFS_FORCED_SHUTDOWN(dp->i_mount))
|
|
return XFS_ERROR(EIO);
|
|
|
|
lock_mode = xfs_ilock_map_shared(dp);
|
|
error = xfs_dir_lookup_int(dp, lock_mode, dentry, &e_inum, &ip);
|
|
if (!error) {
|
|
*vpp = XFS_ITOV(ip);
|
|
xfs_itrace_ref(ip);
|
|
}
|
|
xfs_iunlock_map_shared(dp, lock_mode);
|
|
return error;
|
|
}
|
|
|
|
int
|
|
xfs_create(
|
|
xfs_inode_t *dp,
|
|
bhv_vname_t *dentry,
|
|
mode_t mode,
|
|
xfs_dev_t rdev,
|
|
bhv_vnode_t **vpp,
|
|
cred_t *credp)
|
|
{
|
|
char *name = VNAME(dentry);
|
|
xfs_mount_t *mp = dp->i_mount;
|
|
bhv_vnode_t *dir_vp = XFS_ITOV(dp);
|
|
xfs_inode_t *ip;
|
|
bhv_vnode_t *vp = NULL;
|
|
xfs_trans_t *tp;
|
|
int error;
|
|
xfs_bmap_free_t free_list;
|
|
xfs_fsblock_t first_block;
|
|
boolean_t unlock_dp_on_error = B_FALSE;
|
|
int dm_event_sent = 0;
|
|
uint cancel_flags;
|
|
int committed;
|
|
xfs_prid_t prid;
|
|
struct xfs_dquot *udqp, *gdqp;
|
|
uint resblks;
|
|
int namelen;
|
|
|
|
ASSERT(!*vpp);
|
|
xfs_itrace_entry(dp);
|
|
|
|
namelen = VNAMELEN(dentry);
|
|
|
|
if (DM_EVENT_ENABLED(dp, DM_EVENT_CREATE)) {
|
|
error = XFS_SEND_NAMESP(mp, DM_EVENT_CREATE,
|
|
dir_vp, DM_RIGHT_NULL, NULL,
|
|
DM_RIGHT_NULL, name, NULL,
|
|
mode, 0, 0);
|
|
|
|
if (error)
|
|
return error;
|
|
dm_event_sent = 1;
|
|
}
|
|
|
|
if (XFS_FORCED_SHUTDOWN(mp))
|
|
return XFS_ERROR(EIO);
|
|
|
|
/* Return through std_return after this point. */
|
|
|
|
udqp = gdqp = NULL;
|
|
if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT)
|
|
prid = dp->i_d.di_projid;
|
|
else
|
|
prid = (xfs_prid_t)dfltprid;
|
|
|
|
/*
|
|
* Make sure that we have allocated dquot(s) on disk.
|
|
*/
|
|
error = XFS_QM_DQVOPALLOC(mp, dp,
|
|
current_fsuid(credp), current_fsgid(credp), prid,
|
|
XFS_QMOPT_QUOTALL|XFS_QMOPT_INHERIT, &udqp, &gdqp);
|
|
if (error)
|
|
goto std_return;
|
|
|
|
ip = NULL;
|
|
|
|
tp = xfs_trans_alloc(mp, XFS_TRANS_CREATE);
|
|
cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
|
|
resblks = XFS_CREATE_SPACE_RES(mp, namelen);
|
|
/*
|
|
* Initially assume that the file does not exist and
|
|
* reserve the resources for that case. If that is not
|
|
* the case we'll drop the one we have and get a more
|
|
* appropriate transaction later.
|
|
*/
|
|
error = xfs_trans_reserve(tp, resblks, XFS_CREATE_LOG_RES(mp), 0,
|
|
XFS_TRANS_PERM_LOG_RES, XFS_CREATE_LOG_COUNT);
|
|
if (error == ENOSPC) {
|
|
resblks = 0;
|
|
error = xfs_trans_reserve(tp, 0, XFS_CREATE_LOG_RES(mp), 0,
|
|
XFS_TRANS_PERM_LOG_RES, XFS_CREATE_LOG_COUNT);
|
|
}
|
|
if (error) {
|
|
cancel_flags = 0;
|
|
goto error_return;
|
|
}
|
|
|
|
xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT);
|
|
unlock_dp_on_error = B_TRUE;
|
|
|
|
XFS_BMAP_INIT(&free_list, &first_block);
|
|
|
|
ASSERT(ip == NULL);
|
|
|
|
/*
|
|
* Reserve disk quota and the inode.
|
|
*/
|
|
error = XFS_TRANS_RESERVE_QUOTA(mp, tp, udqp, gdqp, resblks, 1, 0);
|
|
if (error)
|
|
goto error_return;
|
|
|
|
if (resblks == 0 && (error = xfs_dir_canenter(tp, dp, name, namelen)))
|
|
goto error_return;
|
|
error = xfs_dir_ialloc(&tp, dp, mode, 1,
|
|
rdev, credp, prid, resblks > 0,
|
|
&ip, &committed);
|
|
if (error) {
|
|
if (error == ENOSPC)
|
|
goto error_return;
|
|
goto abort_return;
|
|
}
|
|
xfs_itrace_ref(ip);
|
|
|
|
/*
|
|
* At this point, we've gotten a newly allocated inode.
|
|
* It is locked (and joined to the transaction).
|
|
*/
|
|
|
|
ASSERT(ismrlocked (&ip->i_lock, MR_UPDATE));
|
|
|
|
/*
|
|
* Now we join the directory inode to the transaction. We do not do it
|
|
* earlier because xfs_dir_ialloc might commit the previous transaction
|
|
* (and release all the locks). An error from here on will result in
|
|
* the transaction cancel unlocking dp so don't do it explicitly in the
|
|
* error path.
|
|
*/
|
|
VN_HOLD(dir_vp);
|
|
xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
|
|
unlock_dp_on_error = B_FALSE;
|
|
|
|
error = xfs_dir_createname(tp, dp, name, namelen, ip->i_ino,
|
|
&first_block, &free_list, resblks ?
|
|
resblks - XFS_IALLOC_SPACE_RES(mp) : 0);
|
|
if (error) {
|
|
ASSERT(error != ENOSPC);
|
|
goto abort_return;
|
|
}
|
|
xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
|
|
xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE);
|
|
|
|
/*
|
|
* If this is a synchronous mount, make sure that the
|
|
* create transaction goes to disk before returning to
|
|
* the user.
|
|
*/
|
|
if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) {
|
|
xfs_trans_set_sync(tp);
|
|
}
|
|
|
|
dp->i_gen++;
|
|
|
|
/*
|
|
* Attach the dquot(s) to the inodes and modify them incore.
|
|
* These ids of the inode couldn't have changed since the new
|
|
* inode has been locked ever since it was created.
|
|
*/
|
|
XFS_QM_DQVOPCREATE(mp, tp, ip, udqp, gdqp);
|
|
|
|
/*
|
|
* xfs_trans_commit normally decrements the vnode ref count
|
|
* when it unlocks the inode. Since we want to return the
|
|
* vnode to the caller, we bump the vnode ref count now.
|
|
*/
|
|
IHOLD(ip);
|
|
vp = XFS_ITOV(ip);
|
|
|
|
error = xfs_bmap_finish(&tp, &free_list, &committed);
|
|
if (error) {
|
|
xfs_bmap_cancel(&free_list);
|
|
goto abort_rele;
|
|
}
|
|
|
|
error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
|
|
if (error) {
|
|
IRELE(ip);
|
|
tp = NULL;
|
|
goto error_return;
|
|
}
|
|
|
|
XFS_QM_DQRELE(mp, udqp);
|
|
XFS_QM_DQRELE(mp, gdqp);
|
|
|
|
*vpp = vp;
|
|
|
|
/* Fallthrough to std_return with error = 0 */
|
|
|
|
std_return:
|
|
if ((*vpp || (error != 0 && dm_event_sent != 0)) &&
|
|
DM_EVENT_ENABLED(dp, DM_EVENT_POSTCREATE)) {
|
|
(void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTCREATE,
|
|
dir_vp, DM_RIGHT_NULL,
|
|
*vpp ? vp:NULL,
|
|
DM_RIGHT_NULL, name, NULL,
|
|
mode, error, 0);
|
|
}
|
|
return error;
|
|
|
|
abort_return:
|
|
cancel_flags |= XFS_TRANS_ABORT;
|
|
/* FALLTHROUGH */
|
|
|
|
error_return:
|
|
if (tp != NULL)
|
|
xfs_trans_cancel(tp, cancel_flags);
|
|
|
|
XFS_QM_DQRELE(mp, udqp);
|
|
XFS_QM_DQRELE(mp, gdqp);
|
|
|
|
if (unlock_dp_on_error)
|
|
xfs_iunlock(dp, XFS_ILOCK_EXCL);
|
|
|
|
goto std_return;
|
|
|
|
abort_rele:
|
|
/*
|
|
* Wait until after the current transaction is aborted to
|
|
* release the inode. This prevents recursive transactions
|
|
* and deadlocks from xfs_inactive.
|
|
*/
|
|
cancel_flags |= XFS_TRANS_ABORT;
|
|
xfs_trans_cancel(tp, cancel_flags);
|
|
IRELE(ip);
|
|
|
|
XFS_QM_DQRELE(mp, udqp);
|
|
XFS_QM_DQRELE(mp, gdqp);
|
|
|
|
goto std_return;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
/*
|
|
* Some counters to see if (and how often) we are hitting some deadlock
|
|
* prevention code paths.
|
|
*/
|
|
|
|
int xfs_rm_locks;
|
|
int xfs_rm_lock_delays;
|
|
int xfs_rm_attempts;
|
|
#endif
|
|
|
|
/*
|
|
* The following routine will lock the inodes associated with the
|
|
* directory and the named entry in the directory. The locks are
|
|
* acquired in increasing inode number.
|
|
*
|
|
* If the entry is "..", then only the directory is locked. The
|
|
* vnode ref count will still include that from the .. entry in
|
|
* this case.
|
|
*
|
|
* There is a deadlock we need to worry about. If the locked directory is
|
|
* in the AIL, it might be blocking up the log. The next inode we lock
|
|
* could be already locked by another thread waiting for log space (e.g
|
|
* a permanent log reservation with a long running transaction (see
|
|
* xfs_itruncate_finish)). To solve this, we must check if the directory
|
|
* is in the ail and use lock_nowait. If we can't lock, we need to
|
|
* drop the inode lock on the directory and try again. xfs_iunlock will
|
|
* potentially push the tail if we were holding up the log.
|
|
*/
|
|
STATIC int
|
|
xfs_lock_dir_and_entry(
|
|
xfs_inode_t *dp,
|
|
xfs_inode_t *ip) /* inode of entry 'name' */
|
|
{
|
|
int attempts;
|
|
xfs_ino_t e_inum;
|
|
xfs_inode_t *ips[2];
|
|
xfs_log_item_t *lp;
|
|
|
|
#ifdef DEBUG
|
|
xfs_rm_locks++;
|
|
#endif
|
|
attempts = 0;
|
|
|
|
again:
|
|
xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT);
|
|
|
|
e_inum = ip->i_ino;
|
|
|
|
xfs_itrace_ref(ip);
|
|
|
|
/*
|
|
* We want to lock in increasing inum. Since we've already
|
|
* acquired the lock on the directory, we may need to release
|
|
* if if the inum of the entry turns out to be less.
|
|
*/
|
|
if (e_inum > dp->i_ino) {
|
|
/*
|
|
* We are already in the right order, so just
|
|
* lock on the inode of the entry.
|
|
* We need to use nowait if dp is in the AIL.
|
|
*/
|
|
|
|
lp = (xfs_log_item_t *)dp->i_itemp;
|
|
if (lp && (lp->li_flags & XFS_LI_IN_AIL)) {
|
|
if (!xfs_ilock_nowait(ip, XFS_ILOCK_EXCL)) {
|
|
attempts++;
|
|
#ifdef DEBUG
|
|
xfs_rm_attempts++;
|
|
#endif
|
|
|
|
/*
|
|
* Unlock dp and try again.
|
|
* xfs_iunlock will try to push the tail
|
|
* if the inode is in the AIL.
|
|
*/
|
|
|
|
xfs_iunlock(dp, XFS_ILOCK_EXCL);
|
|
|
|
if ((attempts % 5) == 0) {
|
|
delay(1); /* Don't just spin the CPU */
|
|
#ifdef DEBUG
|
|
xfs_rm_lock_delays++;
|
|
#endif
|
|
}
|
|
goto again;
|
|
}
|
|
} else {
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
}
|
|
} else if (e_inum < dp->i_ino) {
|
|
xfs_iunlock(dp, XFS_ILOCK_EXCL);
|
|
|
|
ips[0] = ip;
|
|
ips[1] = dp;
|
|
xfs_lock_inodes(ips, 2, 0, XFS_ILOCK_EXCL);
|
|
}
|
|
/* else e_inum == dp->i_ino */
|
|
/* This can happen if we're asked to lock /x/..
|
|
* the entry is "..", which is also the parent directory.
|
|
*/
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
int xfs_locked_n;
|
|
int xfs_small_retries;
|
|
int xfs_middle_retries;
|
|
int xfs_lots_retries;
|
|
int xfs_lock_delays;
|
|
#endif
|
|
|
|
/*
|
|
* Bump the subclass so xfs_lock_inodes() acquires each lock with
|
|
* a different value
|
|
*/
|
|
static inline int
|
|
xfs_lock_inumorder(int lock_mode, int subclass)
|
|
{
|
|
if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL))
|
|
lock_mode |= (subclass + XFS_LOCK_INUMORDER) << XFS_IOLOCK_SHIFT;
|
|
if (lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL))
|
|
lock_mode |= (subclass + XFS_LOCK_INUMORDER) << XFS_ILOCK_SHIFT;
|
|
|
|
return lock_mode;
|
|
}
|
|
|
|
/*
|
|
* The following routine will lock n inodes in exclusive mode.
|
|
* We assume the caller calls us with the inodes in i_ino order.
|
|
*
|
|
* We need to detect deadlock where an inode that we lock
|
|
* is in the AIL and we start waiting for another inode that is locked
|
|
* by a thread in a long running transaction (such as truncate). This can
|
|
* result in deadlock since the long running trans might need to wait
|
|
* for the inode we just locked in order to push the tail and free space
|
|
* in the log.
|
|
*/
|
|
void
|
|
xfs_lock_inodes(
|
|
xfs_inode_t **ips,
|
|
int inodes,
|
|
int first_locked,
|
|
uint lock_mode)
|
|
{
|
|
int attempts = 0, i, j, try_lock;
|
|
xfs_log_item_t *lp;
|
|
|
|
ASSERT(ips && (inodes >= 2)); /* we need at least two */
|
|
|
|
if (first_locked) {
|
|
try_lock = 1;
|
|
i = 1;
|
|
} else {
|
|
try_lock = 0;
|
|
i = 0;
|
|
}
|
|
|
|
again:
|
|
for (; i < inodes; i++) {
|
|
ASSERT(ips[i]);
|
|
|
|
if (i && (ips[i] == ips[i-1])) /* Already locked */
|
|
continue;
|
|
|
|
/*
|
|
* If try_lock is not set yet, make sure all locked inodes
|
|
* are not in the AIL.
|
|
* If any are, set try_lock to be used later.
|
|
*/
|
|
|
|
if (!try_lock) {
|
|
for (j = (i - 1); j >= 0 && !try_lock; j--) {
|
|
lp = (xfs_log_item_t *)ips[j]->i_itemp;
|
|
if (lp && (lp->li_flags & XFS_LI_IN_AIL)) {
|
|
try_lock++;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If any of the previous locks we have locked is in the AIL,
|
|
* we must TRY to get the second and subsequent locks. If
|
|
* we can't get any, we must release all we have
|
|
* and try again.
|
|
*/
|
|
|
|
if (try_lock) {
|
|
/* try_lock must be 0 if i is 0. */
|
|
/*
|
|
* try_lock means we have an inode locked
|
|
* that is in the AIL.
|
|
*/
|
|
ASSERT(i != 0);
|
|
if (!xfs_ilock_nowait(ips[i], xfs_lock_inumorder(lock_mode, i))) {
|
|
attempts++;
|
|
|
|
/*
|
|
* Unlock all previous guys and try again.
|
|
* xfs_iunlock will try to push the tail
|
|
* if the inode is in the AIL.
|
|
*/
|
|
|
|
for(j = i - 1; j >= 0; j--) {
|
|
|
|
/*
|
|
* Check to see if we've already
|
|
* unlocked this one.
|
|
* Not the first one going back,
|
|
* and the inode ptr is the same.
|
|
*/
|
|
if ((j != (i - 1)) && ips[j] ==
|
|
ips[j+1])
|
|
continue;
|
|
|
|
xfs_iunlock(ips[j], lock_mode);
|
|
}
|
|
|
|
if ((attempts % 5) == 0) {
|
|
delay(1); /* Don't just spin the CPU */
|
|
#ifdef DEBUG
|
|
xfs_lock_delays++;
|
|
#endif
|
|
}
|
|
i = 0;
|
|
try_lock = 0;
|
|
goto again;
|
|
}
|
|
} else {
|
|
xfs_ilock(ips[i], xfs_lock_inumorder(lock_mode, i));
|
|
}
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
if (attempts) {
|
|
if (attempts < 5) xfs_small_retries++;
|
|
else if (attempts < 100) xfs_middle_retries++;
|
|
else xfs_lots_retries++;
|
|
} else {
|
|
xfs_locked_n++;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
#define REMOVE_DEBUG_TRACE(x) {remove_which_error_return = (x);}
|
|
int remove_which_error_return = 0;
|
|
#else /* ! DEBUG */
|
|
#define REMOVE_DEBUG_TRACE(x)
|
|
#endif /* ! DEBUG */
|
|
|
|
int
|
|
xfs_remove(
|
|
xfs_inode_t *dp,
|
|
bhv_vname_t *dentry)
|
|
{
|
|
bhv_vnode_t *dir_vp = XFS_ITOV(dp);
|
|
char *name = VNAME(dentry);
|
|
xfs_mount_t *mp = dp->i_mount;
|
|
xfs_inode_t *ip;
|
|
xfs_trans_t *tp = NULL;
|
|
int error = 0;
|
|
xfs_bmap_free_t free_list;
|
|
xfs_fsblock_t first_block;
|
|
int cancel_flags;
|
|
int committed;
|
|
int dm_di_mode = 0;
|
|
int link_zero;
|
|
uint resblks;
|
|
int namelen;
|
|
|
|
xfs_itrace_entry(dp);
|
|
|
|
if (XFS_FORCED_SHUTDOWN(mp))
|
|
return XFS_ERROR(EIO);
|
|
|
|
namelen = VNAMELEN(dentry);
|
|
|
|
if (!xfs_get_dir_entry(dentry, &ip)) {
|
|
dm_di_mode = ip->i_d.di_mode;
|
|
IRELE(ip);
|
|
}
|
|
|
|
if (DM_EVENT_ENABLED(dp, DM_EVENT_REMOVE)) {
|
|
error = XFS_SEND_NAMESP(mp, DM_EVENT_REMOVE, dir_vp,
|
|
DM_RIGHT_NULL, NULL, DM_RIGHT_NULL,
|
|
name, NULL, dm_di_mode, 0, 0);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
/* From this point on, return through std_return */
|
|
ip = NULL;
|
|
|
|
/*
|
|
* We need to get a reference to ip before we get our log
|
|
* reservation. The reason for this is that we cannot call
|
|
* xfs_iget for an inode for which we do not have a reference
|
|
* once we've acquired a log reservation. This is because the
|
|
* inode we are trying to get might be in xfs_inactive going
|
|
* for a log reservation. Since we'll have to wait for the
|
|
* inactive code to complete before returning from xfs_iget,
|
|
* we need to make sure that we don't have log space reserved
|
|
* when we call xfs_iget. Instead we get an unlocked reference
|
|
* to the inode before getting our log reservation.
|
|
*/
|
|
error = xfs_get_dir_entry(dentry, &ip);
|
|
if (error) {
|
|
REMOVE_DEBUG_TRACE(__LINE__);
|
|
goto std_return;
|
|
}
|
|
|
|
dm_di_mode = ip->i_d.di_mode;
|
|
|
|
xfs_itrace_entry(ip);
|
|
xfs_itrace_ref(ip);
|
|
|
|
error = XFS_QM_DQATTACH(mp, dp, 0);
|
|
if (!error && dp != ip)
|
|
error = XFS_QM_DQATTACH(mp, ip, 0);
|
|
if (error) {
|
|
REMOVE_DEBUG_TRACE(__LINE__);
|
|
IRELE(ip);
|
|
goto std_return;
|
|
}
|
|
|
|
tp = xfs_trans_alloc(mp, XFS_TRANS_REMOVE);
|
|
cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
|
|
/*
|
|
* We try to get the real space reservation first,
|
|
* allowing for directory btree deletion(s) implying
|
|
* possible bmap insert(s). If we can't get the space
|
|
* reservation then we use 0 instead, and avoid the bmap
|
|
* btree insert(s) in the directory code by, if the bmap
|
|
* insert tries to happen, instead trimming the LAST
|
|
* block from the directory.
|
|
*/
|
|
resblks = XFS_REMOVE_SPACE_RES(mp);
|
|
error = xfs_trans_reserve(tp, resblks, XFS_REMOVE_LOG_RES(mp), 0,
|
|
XFS_TRANS_PERM_LOG_RES, XFS_REMOVE_LOG_COUNT);
|
|
if (error == ENOSPC) {
|
|
resblks = 0;
|
|
error = xfs_trans_reserve(tp, 0, XFS_REMOVE_LOG_RES(mp), 0,
|
|
XFS_TRANS_PERM_LOG_RES, XFS_REMOVE_LOG_COUNT);
|
|
}
|
|
if (error) {
|
|
ASSERT(error != ENOSPC);
|
|
REMOVE_DEBUG_TRACE(__LINE__);
|
|
xfs_trans_cancel(tp, 0);
|
|
IRELE(ip);
|
|
return error;
|
|
}
|
|
|
|
error = xfs_lock_dir_and_entry(dp, ip);
|
|
if (error) {
|
|
REMOVE_DEBUG_TRACE(__LINE__);
|
|
xfs_trans_cancel(tp, cancel_flags);
|
|
IRELE(ip);
|
|
goto std_return;
|
|
}
|
|
|
|
/*
|
|
* At this point, we've gotten both the directory and the entry
|
|
* inodes locked.
|
|
*/
|
|
xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
|
|
if (dp != ip) {
|
|
/*
|
|
* Increment vnode ref count only in this case since
|
|
* there's an extra vnode reference in the case where
|
|
* dp == ip.
|
|
*/
|
|
IHOLD(dp);
|
|
xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
|
|
}
|
|
|
|
/*
|
|
* Entry must exist since we did a lookup in xfs_lock_dir_and_entry.
|
|
*/
|
|
XFS_BMAP_INIT(&free_list, &first_block);
|
|
error = xfs_dir_removename(tp, dp, name, namelen, ip->i_ino,
|
|
&first_block, &free_list, 0);
|
|
if (error) {
|
|
ASSERT(error != ENOENT);
|
|
REMOVE_DEBUG_TRACE(__LINE__);
|
|
goto error1;
|
|
}
|
|
xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
|
|
|
|
dp->i_gen++;
|
|
xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE);
|
|
|
|
error = xfs_droplink(tp, ip);
|
|
if (error) {
|
|
REMOVE_DEBUG_TRACE(__LINE__);
|
|
goto error1;
|
|
}
|
|
|
|
/* Determine if this is the last link while
|
|
* we are in the transaction.
|
|
*/
|
|
link_zero = (ip)->i_d.di_nlink==0;
|
|
|
|
/*
|
|
* Take an extra ref on the inode so that it doesn't
|
|
* go to xfs_inactive() from within the commit.
|
|
*/
|
|
IHOLD(ip);
|
|
|
|
/*
|
|
* If this is a synchronous mount, make sure that the
|
|
* remove transaction goes to disk before returning to
|
|
* the user.
|
|
*/
|
|
if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) {
|
|
xfs_trans_set_sync(tp);
|
|
}
|
|
|
|
error = xfs_bmap_finish(&tp, &free_list, &committed);
|
|
if (error) {
|
|
REMOVE_DEBUG_TRACE(__LINE__);
|
|
goto error_rele;
|
|
}
|
|
|
|
error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
|
|
if (error) {
|
|
IRELE(ip);
|
|
goto std_return;
|
|
}
|
|
|
|
/*
|
|
* Before we drop our extra reference to the inode, purge it
|
|
* from the refcache if it is there. By waiting until afterwards
|
|
* to do the IRELE, we ensure that we won't go inactive in the
|
|
* xfs_refcache_purge_ip routine (although that would be OK).
|
|
*/
|
|
xfs_refcache_purge_ip(ip);
|
|
|
|
/*
|
|
* If we are using filestreams, kill the stream association.
|
|
* If the file is still open it may get a new one but that
|
|
* will get killed on last close in xfs_close() so we don't
|
|
* have to worry about that.
|
|
*/
|
|
if (link_zero && xfs_inode_is_filestream(ip))
|
|
xfs_filestream_deassociate(ip);
|
|
|
|
xfs_itrace_exit(ip);
|
|
IRELE(ip);
|
|
|
|
/* Fall through to std_return with error = 0 */
|
|
std_return:
|
|
if (DM_EVENT_ENABLED(dp, DM_EVENT_POSTREMOVE)) {
|
|
(void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTREMOVE,
|
|
dir_vp, DM_RIGHT_NULL,
|
|
NULL, DM_RIGHT_NULL,
|
|
name, NULL, dm_di_mode, error, 0);
|
|
}
|
|
return error;
|
|
|
|
error1:
|
|
xfs_bmap_cancel(&free_list);
|
|
cancel_flags |= XFS_TRANS_ABORT;
|
|
xfs_trans_cancel(tp, cancel_flags);
|
|
goto std_return;
|
|
|
|
error_rele:
|
|
/*
|
|
* In this case make sure to not release the inode until after
|
|
* the current transaction is aborted. Releasing it beforehand
|
|
* can cause us to go to xfs_inactive and start a recursive
|
|
* transaction which can easily deadlock with the current one.
|
|
*/
|
|
xfs_bmap_cancel(&free_list);
|
|
cancel_flags |= XFS_TRANS_ABORT;
|
|
xfs_trans_cancel(tp, cancel_flags);
|
|
|
|
/*
|
|
* Before we drop our extra reference to the inode, purge it
|
|
* from the refcache if it is there. By waiting until afterwards
|
|
* to do the IRELE, we ensure that we won't go inactive in the
|
|
* xfs_refcache_purge_ip routine (although that would be OK).
|
|
*/
|
|
xfs_refcache_purge_ip(ip);
|
|
|
|
IRELE(ip);
|
|
|
|
goto std_return;
|
|
}
|
|
|
|
int
|
|
xfs_link(
|
|
xfs_inode_t *tdp,
|
|
bhv_vnode_t *src_vp,
|
|
bhv_vname_t *dentry)
|
|
{
|
|
bhv_vnode_t *target_dir_vp = XFS_ITOV(tdp);
|
|
xfs_mount_t *mp = tdp->i_mount;
|
|
xfs_inode_t *sip = xfs_vtoi(src_vp);
|
|
xfs_trans_t *tp;
|
|
xfs_inode_t *ips[2];
|
|
int error;
|
|
xfs_bmap_free_t free_list;
|
|
xfs_fsblock_t first_block;
|
|
int cancel_flags;
|
|
int committed;
|
|
int resblks;
|
|
char *target_name = VNAME(dentry);
|
|
int target_namelen;
|
|
|
|
xfs_itrace_entry(tdp);
|
|
xfs_itrace_entry(xfs_vtoi(src_vp));
|
|
|
|
target_namelen = VNAMELEN(dentry);
|
|
ASSERT(!VN_ISDIR(src_vp));
|
|
|
|
if (XFS_FORCED_SHUTDOWN(mp))
|
|
return XFS_ERROR(EIO);
|
|
|
|
if (DM_EVENT_ENABLED(tdp, DM_EVENT_LINK)) {
|
|
error = XFS_SEND_NAMESP(mp, DM_EVENT_LINK,
|
|
target_dir_vp, DM_RIGHT_NULL,
|
|
src_vp, DM_RIGHT_NULL,
|
|
target_name, NULL, 0, 0, 0);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
/* Return through std_return after this point. */
|
|
|
|
error = XFS_QM_DQATTACH(mp, sip, 0);
|
|
if (!error && sip != tdp)
|
|
error = XFS_QM_DQATTACH(mp, tdp, 0);
|
|
if (error)
|
|
goto std_return;
|
|
|
|
tp = xfs_trans_alloc(mp, XFS_TRANS_LINK);
|
|
cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
|
|
resblks = XFS_LINK_SPACE_RES(mp, target_namelen);
|
|
error = xfs_trans_reserve(tp, resblks, XFS_LINK_LOG_RES(mp), 0,
|
|
XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT);
|
|
if (error == ENOSPC) {
|
|
resblks = 0;
|
|
error = xfs_trans_reserve(tp, 0, XFS_LINK_LOG_RES(mp), 0,
|
|
XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT);
|
|
}
|
|
if (error) {
|
|
cancel_flags = 0;
|
|
goto error_return;
|
|
}
|
|
|
|
if (sip->i_ino < tdp->i_ino) {
|
|
ips[0] = sip;
|
|
ips[1] = tdp;
|
|
} else {
|
|
ips[0] = tdp;
|
|
ips[1] = sip;
|
|
}
|
|
|
|
xfs_lock_inodes(ips, 2, 0, XFS_ILOCK_EXCL);
|
|
|
|
/*
|
|
* Increment vnode ref counts since xfs_trans_commit &
|
|
* xfs_trans_cancel will both unlock the inodes and
|
|
* decrement the associated ref counts.
|
|
*/
|
|
VN_HOLD(src_vp);
|
|
VN_HOLD(target_dir_vp);
|
|
xfs_trans_ijoin(tp, sip, XFS_ILOCK_EXCL);
|
|
xfs_trans_ijoin(tp, tdp, XFS_ILOCK_EXCL);
|
|
|
|
/*
|
|
* If the source has too many links, we can't make any more to it.
|
|
*/
|
|
if (sip->i_d.di_nlink >= XFS_MAXLINK) {
|
|
error = XFS_ERROR(EMLINK);
|
|
goto error_return;
|
|
}
|
|
|
|
/*
|
|
* If we are using project inheritance, we only allow hard link
|
|
* creation in our tree when the project IDs are the same; else
|
|
* the tree quota mechanism could be circumvented.
|
|
*/
|
|
if (unlikely((tdp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) &&
|
|
(tdp->i_d.di_projid != sip->i_d.di_projid))) {
|
|
error = XFS_ERROR(EXDEV);
|
|
goto error_return;
|
|
}
|
|
|
|
if (resblks == 0 &&
|
|
(error = xfs_dir_canenter(tp, tdp, target_name, target_namelen)))
|
|
goto error_return;
|
|
|
|
XFS_BMAP_INIT(&free_list, &first_block);
|
|
|
|
error = xfs_dir_createname(tp, tdp, target_name, target_namelen,
|
|
sip->i_ino, &first_block, &free_list,
|
|
resblks);
|
|
if (error)
|
|
goto abort_return;
|
|
xfs_ichgtime(tdp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
|
|
tdp->i_gen++;
|
|
xfs_trans_log_inode(tp, tdp, XFS_ILOG_CORE);
|
|
|
|
error = xfs_bumplink(tp, sip);
|
|
if (error)
|
|
goto abort_return;
|
|
|
|
/*
|
|
* If this is a synchronous mount, make sure that the
|
|
* link transaction goes to disk before returning to
|
|
* the user.
|
|
*/
|
|
if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) {
|
|
xfs_trans_set_sync(tp);
|
|
}
|
|
|
|
error = xfs_bmap_finish (&tp, &free_list, &committed);
|
|
if (error) {
|
|
xfs_bmap_cancel(&free_list);
|
|
goto abort_return;
|
|
}
|
|
|
|
error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
|
|
if (error)
|
|
goto std_return;
|
|
|
|
/* Fall through to std_return with error = 0. */
|
|
std_return:
|
|
if (DM_EVENT_ENABLED(sip, DM_EVENT_POSTLINK)) {
|
|
(void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTLINK,
|
|
target_dir_vp, DM_RIGHT_NULL,
|
|
src_vp, DM_RIGHT_NULL,
|
|
target_name, NULL, 0, error, 0);
|
|
}
|
|
return error;
|
|
|
|
abort_return:
|
|
cancel_flags |= XFS_TRANS_ABORT;
|
|
/* FALLTHROUGH */
|
|
|
|
error_return:
|
|
xfs_trans_cancel(tp, cancel_flags);
|
|
goto std_return;
|
|
}
|
|
|
|
|
|
int
|
|
xfs_mkdir(
|
|
xfs_inode_t *dp,
|
|
bhv_vname_t *dentry,
|
|
mode_t mode,
|
|
bhv_vnode_t **vpp,
|
|
cred_t *credp)
|
|
{
|
|
bhv_vnode_t *dir_vp = XFS_ITOV(dp);
|
|
char *dir_name = VNAME(dentry);
|
|
int dir_namelen = VNAMELEN(dentry);
|
|
xfs_mount_t *mp = dp->i_mount;
|
|
xfs_inode_t *cdp; /* inode of created dir */
|
|
bhv_vnode_t *cvp; /* vnode of created dir */
|
|
xfs_trans_t *tp;
|
|
int cancel_flags;
|
|
int error;
|
|
int committed;
|
|
xfs_bmap_free_t free_list;
|
|
xfs_fsblock_t first_block;
|
|
boolean_t unlock_dp_on_error = B_FALSE;
|
|
boolean_t created = B_FALSE;
|
|
int dm_event_sent = 0;
|
|
xfs_prid_t prid;
|
|
struct xfs_dquot *udqp, *gdqp;
|
|
uint resblks;
|
|
|
|
if (XFS_FORCED_SHUTDOWN(mp))
|
|
return XFS_ERROR(EIO);
|
|
|
|
tp = NULL;
|
|
|
|
if (DM_EVENT_ENABLED(dp, DM_EVENT_CREATE)) {
|
|
error = XFS_SEND_NAMESP(mp, DM_EVENT_CREATE,
|
|
dir_vp, DM_RIGHT_NULL, NULL,
|
|
DM_RIGHT_NULL, dir_name, NULL,
|
|
mode, 0, 0);
|
|
if (error)
|
|
return error;
|
|
dm_event_sent = 1;
|
|
}
|
|
|
|
/* Return through std_return after this point. */
|
|
|
|
xfs_itrace_entry(dp);
|
|
|
|
mp = dp->i_mount;
|
|
udqp = gdqp = NULL;
|
|
if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT)
|
|
prid = dp->i_d.di_projid;
|
|
else
|
|
prid = (xfs_prid_t)dfltprid;
|
|
|
|
/*
|
|
* Make sure that we have allocated dquot(s) on disk.
|
|
*/
|
|
error = XFS_QM_DQVOPALLOC(mp, dp,
|
|
current_fsuid(credp), current_fsgid(credp), prid,
|
|
XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp);
|
|
if (error)
|
|
goto std_return;
|
|
|
|
tp = xfs_trans_alloc(mp, XFS_TRANS_MKDIR);
|
|
cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
|
|
resblks = XFS_MKDIR_SPACE_RES(mp, dir_namelen);
|
|
error = xfs_trans_reserve(tp, resblks, XFS_MKDIR_LOG_RES(mp), 0,
|
|
XFS_TRANS_PERM_LOG_RES, XFS_MKDIR_LOG_COUNT);
|
|
if (error == ENOSPC) {
|
|
resblks = 0;
|
|
error = xfs_trans_reserve(tp, 0, XFS_MKDIR_LOG_RES(mp), 0,
|
|
XFS_TRANS_PERM_LOG_RES,
|
|
XFS_MKDIR_LOG_COUNT);
|
|
}
|
|
if (error) {
|
|
cancel_flags = 0;
|
|
goto error_return;
|
|
}
|
|
|
|
xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT);
|
|
unlock_dp_on_error = B_TRUE;
|
|
|
|
/*
|
|
* Check for directory link count overflow.
|
|
*/
|
|
if (dp->i_d.di_nlink >= XFS_MAXLINK) {
|
|
error = XFS_ERROR(EMLINK);
|
|
goto error_return;
|
|
}
|
|
|
|
/*
|
|
* Reserve disk quota and the inode.
|
|
*/
|
|
error = XFS_TRANS_RESERVE_QUOTA(mp, tp, udqp, gdqp, resblks, 1, 0);
|
|
if (error)
|
|
goto error_return;
|
|
|
|
if (resblks == 0 &&
|
|
(error = xfs_dir_canenter(tp, dp, dir_name, dir_namelen)))
|
|
goto error_return;
|
|
/*
|
|
* create the directory inode.
|
|
*/
|
|
error = xfs_dir_ialloc(&tp, dp, mode, 2,
|
|
0, credp, prid, resblks > 0,
|
|
&cdp, NULL);
|
|
if (error) {
|
|
if (error == ENOSPC)
|
|
goto error_return;
|
|
goto abort_return;
|
|
}
|
|
xfs_itrace_ref(cdp);
|
|
|
|
/*
|
|
* Now we add the directory inode to the transaction.
|
|
* We waited until now since xfs_dir_ialloc might start
|
|
* a new transaction. Had we joined the transaction
|
|
* earlier, the locks might have gotten released. An error
|
|
* from here on will result in the transaction cancel
|
|
* unlocking dp so don't do it explicitly in the error path.
|
|
*/
|
|
VN_HOLD(dir_vp);
|
|
xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
|
|
unlock_dp_on_error = B_FALSE;
|
|
|
|
XFS_BMAP_INIT(&free_list, &first_block);
|
|
|
|
error = xfs_dir_createname(tp, dp, dir_name, dir_namelen, cdp->i_ino,
|
|
&first_block, &free_list, resblks ?
|
|
resblks - XFS_IALLOC_SPACE_RES(mp) : 0);
|
|
if (error) {
|
|
ASSERT(error != ENOSPC);
|
|
goto error1;
|
|
}
|
|
xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
|
|
|
|
/*
|
|
* Bump the in memory version number of the parent directory
|
|
* so that other processes accessing it will recognize that
|
|
* the directory has changed.
|
|
*/
|
|
dp->i_gen++;
|
|
|
|
error = xfs_dir_init(tp, cdp, dp);
|
|
if (error)
|
|
goto error2;
|
|
|
|
cdp->i_gen = 1;
|
|
error = xfs_bumplink(tp, dp);
|
|
if (error)
|
|
goto error2;
|
|
|
|
cvp = XFS_ITOV(cdp);
|
|
|
|
created = B_TRUE;
|
|
|
|
*vpp = cvp;
|
|
IHOLD(cdp);
|
|
|
|
/*
|
|
* Attach the dquots to the new inode and modify the icount incore.
|
|
*/
|
|
XFS_QM_DQVOPCREATE(mp, tp, cdp, udqp, gdqp);
|
|
|
|
/*
|
|
* If this is a synchronous mount, make sure that the
|
|
* mkdir transaction goes to disk before returning to
|
|
* the user.
|
|
*/
|
|
if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) {
|
|
xfs_trans_set_sync(tp);
|
|
}
|
|
|
|
error = xfs_bmap_finish(&tp, &free_list, &committed);
|
|
if (error) {
|
|
IRELE(cdp);
|
|
goto error2;
|
|
}
|
|
|
|
error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
|
|
XFS_QM_DQRELE(mp, udqp);
|
|
XFS_QM_DQRELE(mp, gdqp);
|
|
if (error) {
|
|
IRELE(cdp);
|
|
}
|
|
|
|
/* Fall through to std_return with error = 0 or errno from
|
|
* xfs_trans_commit. */
|
|
|
|
std_return:
|
|
if ((created || (error != 0 && dm_event_sent != 0)) &&
|
|
DM_EVENT_ENABLED(dp, DM_EVENT_POSTCREATE)) {
|
|
(void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTCREATE,
|
|
dir_vp, DM_RIGHT_NULL,
|
|
created ? XFS_ITOV(cdp):NULL,
|
|
DM_RIGHT_NULL,
|
|
dir_name, NULL,
|
|
mode, error, 0);
|
|
}
|
|
return error;
|
|
|
|
error2:
|
|
error1:
|
|
xfs_bmap_cancel(&free_list);
|
|
abort_return:
|
|
cancel_flags |= XFS_TRANS_ABORT;
|
|
error_return:
|
|
xfs_trans_cancel(tp, cancel_flags);
|
|
XFS_QM_DQRELE(mp, udqp);
|
|
XFS_QM_DQRELE(mp, gdqp);
|
|
|
|
if (unlock_dp_on_error)
|
|
xfs_iunlock(dp, XFS_ILOCK_EXCL);
|
|
|
|
goto std_return;
|
|
}
|
|
|
|
int
|
|
xfs_rmdir(
|
|
xfs_inode_t *dp,
|
|
bhv_vname_t *dentry)
|
|
{
|
|
bhv_vnode_t *dir_vp = XFS_ITOV(dp);
|
|
char *name = VNAME(dentry);
|
|
int namelen = VNAMELEN(dentry);
|
|
xfs_mount_t *mp = dp->i_mount;
|
|
xfs_inode_t *cdp; /* child directory */
|
|
xfs_trans_t *tp;
|
|
int error;
|
|
xfs_bmap_free_t free_list;
|
|
xfs_fsblock_t first_block;
|
|
int cancel_flags;
|
|
int committed;
|
|
int dm_di_mode = S_IFDIR;
|
|
int last_cdp_link;
|
|
uint resblks;
|
|
|
|
xfs_itrace_entry(dp);
|
|
|
|
if (XFS_FORCED_SHUTDOWN(mp))
|
|
return XFS_ERROR(EIO);
|
|
|
|
if (!xfs_get_dir_entry(dentry, &cdp)) {
|
|
dm_di_mode = cdp->i_d.di_mode;
|
|
IRELE(cdp);
|
|
}
|
|
|
|
if (DM_EVENT_ENABLED(dp, DM_EVENT_REMOVE)) {
|
|
error = XFS_SEND_NAMESP(mp, DM_EVENT_REMOVE,
|
|
dir_vp, DM_RIGHT_NULL,
|
|
NULL, DM_RIGHT_NULL,
|
|
name, NULL, dm_di_mode, 0, 0);
|
|
if (error)
|
|
return XFS_ERROR(error);
|
|
}
|
|
|
|
/* Return through std_return after this point. */
|
|
|
|
cdp = NULL;
|
|
|
|
/*
|
|
* We need to get a reference to cdp before we get our log
|
|
* reservation. The reason for this is that we cannot call
|
|
* xfs_iget for an inode for which we do not have a reference
|
|
* once we've acquired a log reservation. This is because the
|
|
* inode we are trying to get might be in xfs_inactive going
|
|
* for a log reservation. Since we'll have to wait for the
|
|
* inactive code to complete before returning from xfs_iget,
|
|
* we need to make sure that we don't have log space reserved
|
|
* when we call xfs_iget. Instead we get an unlocked reference
|
|
* to the inode before getting our log reservation.
|
|
*/
|
|
error = xfs_get_dir_entry(dentry, &cdp);
|
|
if (error) {
|
|
REMOVE_DEBUG_TRACE(__LINE__);
|
|
goto std_return;
|
|
}
|
|
mp = dp->i_mount;
|
|
dm_di_mode = cdp->i_d.di_mode;
|
|
|
|
/*
|
|
* Get the dquots for the inodes.
|
|
*/
|
|
error = XFS_QM_DQATTACH(mp, dp, 0);
|
|
if (!error && dp != cdp)
|
|
error = XFS_QM_DQATTACH(mp, cdp, 0);
|
|
if (error) {
|
|
IRELE(cdp);
|
|
REMOVE_DEBUG_TRACE(__LINE__);
|
|
goto std_return;
|
|
}
|
|
|
|
tp = xfs_trans_alloc(mp, XFS_TRANS_RMDIR);
|
|
cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
|
|
/*
|
|
* We try to get the real space reservation first,
|
|
* allowing for directory btree deletion(s) implying
|
|
* possible bmap insert(s). If we can't get the space
|
|
* reservation then we use 0 instead, and avoid the bmap
|
|
* btree insert(s) in the directory code by, if the bmap
|
|
* insert tries to happen, instead trimming the LAST
|
|
* block from the directory.
|
|
*/
|
|
resblks = XFS_REMOVE_SPACE_RES(mp);
|
|
error = xfs_trans_reserve(tp, resblks, XFS_REMOVE_LOG_RES(mp), 0,
|
|
XFS_TRANS_PERM_LOG_RES, XFS_DEFAULT_LOG_COUNT);
|
|
if (error == ENOSPC) {
|
|
resblks = 0;
|
|
error = xfs_trans_reserve(tp, 0, XFS_REMOVE_LOG_RES(mp), 0,
|
|
XFS_TRANS_PERM_LOG_RES, XFS_DEFAULT_LOG_COUNT);
|
|
}
|
|
if (error) {
|
|
ASSERT(error != ENOSPC);
|
|
cancel_flags = 0;
|
|
IRELE(cdp);
|
|
goto error_return;
|
|
}
|
|
XFS_BMAP_INIT(&free_list, &first_block);
|
|
|
|
/*
|
|
* Now lock the child directory inode and the parent directory
|
|
* inode in the proper order. This will take care of validating
|
|
* that the directory entry for the child directory inode has
|
|
* not changed while we were obtaining a log reservation.
|
|
*/
|
|
error = xfs_lock_dir_and_entry(dp, cdp);
|
|
if (error) {
|
|
xfs_trans_cancel(tp, cancel_flags);
|
|
IRELE(cdp);
|
|
goto std_return;
|
|
}
|
|
|
|
xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
|
|
if (dp != cdp) {
|
|
/*
|
|
* Only increment the parent directory vnode count if
|
|
* we didn't bump it in looking up cdp. The only time
|
|
* we don't bump it is when we're looking up ".".
|
|
*/
|
|
VN_HOLD(dir_vp);
|
|
}
|
|
|
|
xfs_itrace_ref(cdp);
|
|
xfs_trans_ijoin(tp, cdp, XFS_ILOCK_EXCL);
|
|
|
|
ASSERT(cdp->i_d.di_nlink >= 2);
|
|
if (cdp->i_d.di_nlink != 2) {
|
|
error = XFS_ERROR(ENOTEMPTY);
|
|
goto error_return;
|
|
}
|
|
if (!xfs_dir_isempty(cdp)) {
|
|
error = XFS_ERROR(ENOTEMPTY);
|
|
goto error_return;
|
|
}
|
|
|
|
error = xfs_dir_removename(tp, dp, name, namelen, cdp->i_ino,
|
|
&first_block, &free_list, resblks);
|
|
if (error)
|
|
goto error1;
|
|
|
|
xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
|
|
|
|
/*
|
|
* Bump the in memory generation count on the parent
|
|
* directory so that other can know that it has changed.
|
|
*/
|
|
dp->i_gen++;
|
|
|
|
/*
|
|
* Drop the link from cdp's "..".
|
|
*/
|
|
error = xfs_droplink(tp, dp);
|
|
if (error) {
|
|
goto error1;
|
|
}
|
|
|
|
/*
|
|
* Drop the link from dp to cdp.
|
|
*/
|
|
error = xfs_droplink(tp, cdp);
|
|
if (error) {
|
|
goto error1;
|
|
}
|
|
|
|
/*
|
|
* Drop the "." link from cdp to self.
|
|
*/
|
|
error = xfs_droplink(tp, cdp);
|
|
if (error) {
|
|
goto error1;
|
|
}
|
|
|
|
/* Determine these before committing transaction */
|
|
last_cdp_link = (cdp)->i_d.di_nlink==0;
|
|
|
|
/*
|
|
* Take an extra ref on the child vnode so that it
|
|
* does not go to xfs_inactive() from within the commit.
|
|
*/
|
|
IHOLD(cdp);
|
|
|
|
/*
|
|
* If this is a synchronous mount, make sure that the
|
|
* rmdir transaction goes to disk before returning to
|
|
* the user.
|
|
*/
|
|
if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) {
|
|
xfs_trans_set_sync(tp);
|
|
}
|
|
|
|
error = xfs_bmap_finish (&tp, &free_list, &committed);
|
|
if (error) {
|
|
xfs_bmap_cancel(&free_list);
|
|
xfs_trans_cancel(tp, (XFS_TRANS_RELEASE_LOG_RES |
|
|
XFS_TRANS_ABORT));
|
|
IRELE(cdp);
|
|
goto std_return;
|
|
}
|
|
|
|
error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
|
|
if (error) {
|
|
IRELE(cdp);
|
|
goto std_return;
|
|
}
|
|
|
|
|
|
IRELE(cdp);
|
|
|
|
/* Fall through to std_return with error = 0 or the errno
|
|
* from xfs_trans_commit. */
|
|
std_return:
|
|
if (DM_EVENT_ENABLED(dp, DM_EVENT_POSTREMOVE)) {
|
|
(void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTREMOVE,
|
|
dir_vp, DM_RIGHT_NULL,
|
|
NULL, DM_RIGHT_NULL,
|
|
name, NULL, dm_di_mode,
|
|
error, 0);
|
|
}
|
|
return error;
|
|
|
|
error1:
|
|
xfs_bmap_cancel(&free_list);
|
|
cancel_flags |= XFS_TRANS_ABORT;
|
|
/* FALLTHROUGH */
|
|
|
|
error_return:
|
|
xfs_trans_cancel(tp, cancel_flags);
|
|
goto std_return;
|
|
}
|
|
|
|
int
|
|
xfs_symlink(
|
|
xfs_inode_t *dp,
|
|
bhv_vname_t *dentry,
|
|
char *target_path,
|
|
mode_t mode,
|
|
bhv_vnode_t **vpp,
|
|
cred_t *credp)
|
|
{
|
|
bhv_vnode_t *dir_vp = XFS_ITOV(dp);
|
|
xfs_mount_t *mp = dp->i_mount;
|
|
xfs_trans_t *tp;
|
|
xfs_inode_t *ip;
|
|
int error;
|
|
int pathlen;
|
|
xfs_bmap_free_t free_list;
|
|
xfs_fsblock_t first_block;
|
|
boolean_t unlock_dp_on_error = B_FALSE;
|
|
uint cancel_flags;
|
|
int committed;
|
|
xfs_fileoff_t first_fsb;
|
|
xfs_filblks_t fs_blocks;
|
|
int nmaps;
|
|
xfs_bmbt_irec_t mval[SYMLINK_MAPS];
|
|
xfs_daddr_t d;
|
|
char *cur_chunk;
|
|
int byte_cnt;
|
|
int n;
|
|
xfs_buf_t *bp;
|
|
xfs_prid_t prid;
|
|
struct xfs_dquot *udqp, *gdqp;
|
|
uint resblks;
|
|
char *link_name = VNAME(dentry);
|
|
int link_namelen;
|
|
|
|
*vpp = NULL;
|
|
error = 0;
|
|
ip = NULL;
|
|
tp = NULL;
|
|
|
|
xfs_itrace_entry(dp);
|
|
|
|
if (XFS_FORCED_SHUTDOWN(mp))
|
|
return XFS_ERROR(EIO);
|
|
|
|
link_namelen = VNAMELEN(dentry);
|
|
|
|
/*
|
|
* Check component lengths of the target path name.
|
|
*/
|
|
pathlen = strlen(target_path);
|
|
if (pathlen >= MAXPATHLEN) /* total string too long */
|
|
return XFS_ERROR(ENAMETOOLONG);
|
|
if (pathlen >= MAXNAMELEN) { /* is any component too long? */
|
|
int len, total;
|
|
char *path;
|
|
|
|
for (total = 0, path = target_path; total < pathlen;) {
|
|
/*
|
|
* Skip any slashes.
|
|
*/
|
|
while(*path == '/') {
|
|
total++;
|
|
path++;
|
|
}
|
|
|
|
/*
|
|
* Count up to the next slash or end of path.
|
|
* Error out if the component is bigger than MAXNAMELEN.
|
|
*/
|
|
for(len = 0; *path != '/' && total < pathlen;total++, path++) {
|
|
if (++len >= MAXNAMELEN) {
|
|
error = ENAMETOOLONG;
|
|
return error;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (DM_EVENT_ENABLED(dp, DM_EVENT_SYMLINK)) {
|
|
error = XFS_SEND_NAMESP(mp, DM_EVENT_SYMLINK, dir_vp,
|
|
DM_RIGHT_NULL, NULL, DM_RIGHT_NULL,
|
|
link_name, target_path, 0, 0, 0);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
/* Return through std_return after this point. */
|
|
|
|
udqp = gdqp = NULL;
|
|
if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT)
|
|
prid = dp->i_d.di_projid;
|
|
else
|
|
prid = (xfs_prid_t)dfltprid;
|
|
|
|
/*
|
|
* Make sure that we have allocated dquot(s) on disk.
|
|
*/
|
|
error = XFS_QM_DQVOPALLOC(mp, dp,
|
|
current_fsuid(credp), current_fsgid(credp), prid,
|
|
XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp);
|
|
if (error)
|
|
goto std_return;
|
|
|
|
tp = xfs_trans_alloc(mp, XFS_TRANS_SYMLINK);
|
|
cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
|
|
/*
|
|
* The symlink will fit into the inode data fork?
|
|
* There can't be any attributes so we get the whole variable part.
|
|
*/
|
|
if (pathlen <= XFS_LITINO(mp))
|
|
fs_blocks = 0;
|
|
else
|
|
fs_blocks = XFS_B_TO_FSB(mp, pathlen);
|
|
resblks = XFS_SYMLINK_SPACE_RES(mp, link_namelen, fs_blocks);
|
|
error = xfs_trans_reserve(tp, resblks, XFS_SYMLINK_LOG_RES(mp), 0,
|
|
XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT);
|
|
if (error == ENOSPC && fs_blocks == 0) {
|
|
resblks = 0;
|
|
error = xfs_trans_reserve(tp, 0, XFS_SYMLINK_LOG_RES(mp), 0,
|
|
XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT);
|
|
}
|
|
if (error) {
|
|
cancel_flags = 0;
|
|
goto error_return;
|
|
}
|
|
|
|
xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT);
|
|
unlock_dp_on_error = B_TRUE;
|
|
|
|
/*
|
|
* Check whether the directory allows new symlinks or not.
|
|
*/
|
|
if (dp->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) {
|
|
error = XFS_ERROR(EPERM);
|
|
goto error_return;
|
|
}
|
|
|
|
/*
|
|
* Reserve disk quota : blocks and inode.
|
|
*/
|
|
error = XFS_TRANS_RESERVE_QUOTA(mp, tp, udqp, gdqp, resblks, 1, 0);
|
|
if (error)
|
|
goto error_return;
|
|
|
|
/*
|
|
* Check for ability to enter directory entry, if no space reserved.
|
|
*/
|
|
if (resblks == 0 &&
|
|
(error = xfs_dir_canenter(tp, dp, link_name, link_namelen)))
|
|
goto error_return;
|
|
/*
|
|
* Initialize the bmap freelist prior to calling either
|
|
* bmapi or the directory create code.
|
|
*/
|
|
XFS_BMAP_INIT(&free_list, &first_block);
|
|
|
|
/*
|
|
* Allocate an inode for the symlink.
|
|
*/
|
|
error = xfs_dir_ialloc(&tp, dp, S_IFLNK | (mode & ~S_IFMT),
|
|
1, 0, credp, prid, resblks > 0, &ip, NULL);
|
|
if (error) {
|
|
if (error == ENOSPC)
|
|
goto error_return;
|
|
goto error1;
|
|
}
|
|
xfs_itrace_ref(ip);
|
|
|
|
/*
|
|
* An error after we've joined dp to the transaction will result in the
|
|
* transaction cancel unlocking dp so don't do it explicitly in the
|
|
* error path.
|
|
*/
|
|
VN_HOLD(dir_vp);
|
|
xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
|
|
unlock_dp_on_error = B_FALSE;
|
|
|
|
/*
|
|
* Also attach the dquot(s) to it, if applicable.
|
|
*/
|
|
XFS_QM_DQVOPCREATE(mp, tp, ip, udqp, gdqp);
|
|
|
|
if (resblks)
|
|
resblks -= XFS_IALLOC_SPACE_RES(mp);
|
|
/*
|
|
* If the symlink will fit into the inode, write it inline.
|
|
*/
|
|
if (pathlen <= XFS_IFORK_DSIZE(ip)) {
|
|
xfs_idata_realloc(ip, pathlen, XFS_DATA_FORK);
|
|
memcpy(ip->i_df.if_u1.if_data, target_path, pathlen);
|
|
ip->i_d.di_size = pathlen;
|
|
|
|
/*
|
|
* The inode was initially created in extent format.
|
|
*/
|
|
ip->i_df.if_flags &= ~(XFS_IFEXTENTS | XFS_IFBROOT);
|
|
ip->i_df.if_flags |= XFS_IFINLINE;
|
|
|
|
ip->i_d.di_format = XFS_DINODE_FMT_LOCAL;
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_DDATA | XFS_ILOG_CORE);
|
|
|
|
} else {
|
|
first_fsb = 0;
|
|
nmaps = SYMLINK_MAPS;
|
|
|
|
error = xfs_bmapi(tp, ip, first_fsb, fs_blocks,
|
|
XFS_BMAPI_WRITE | XFS_BMAPI_METADATA,
|
|
&first_block, resblks, mval, &nmaps,
|
|
&free_list, NULL);
|
|
if (error) {
|
|
goto error1;
|
|
}
|
|
|
|
if (resblks)
|
|
resblks -= fs_blocks;
|
|
ip->i_d.di_size = pathlen;
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
|
|
|
|
cur_chunk = target_path;
|
|
for (n = 0; n < nmaps; n++) {
|
|
d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock);
|
|
byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount);
|
|
bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d,
|
|
BTOBB(byte_cnt), 0);
|
|
ASSERT(bp && !XFS_BUF_GETERROR(bp));
|
|
if (pathlen < byte_cnt) {
|
|
byte_cnt = pathlen;
|
|
}
|
|
pathlen -= byte_cnt;
|
|
|
|
memcpy(XFS_BUF_PTR(bp), cur_chunk, byte_cnt);
|
|
cur_chunk += byte_cnt;
|
|
|
|
xfs_trans_log_buf(tp, bp, 0, byte_cnt - 1);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Create the directory entry for the symlink.
|
|
*/
|
|
error = xfs_dir_createname(tp, dp, link_name, link_namelen, ip->i_ino,
|
|
&first_block, &free_list, resblks);
|
|
if (error)
|
|
goto error1;
|
|
xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
|
|
xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE);
|
|
|
|
/*
|
|
* Bump the in memory version number of the parent directory
|
|
* so that other processes accessing it will recognize that
|
|
* the directory has changed.
|
|
*/
|
|
dp->i_gen++;
|
|
|
|
/*
|
|
* If this is a synchronous mount, make sure that the
|
|
* symlink transaction goes to disk before returning to
|
|
* the user.
|
|
*/
|
|
if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) {
|
|
xfs_trans_set_sync(tp);
|
|
}
|
|
|
|
/*
|
|
* xfs_trans_commit normally decrements the vnode ref count
|
|
* when it unlocks the inode. Since we want to return the
|
|
* vnode to the caller, we bump the vnode ref count now.
|
|
*/
|
|
IHOLD(ip);
|
|
|
|
error = xfs_bmap_finish(&tp, &free_list, &committed);
|
|
if (error) {
|
|
goto error2;
|
|
}
|
|
error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
|
|
XFS_QM_DQRELE(mp, udqp);
|
|
XFS_QM_DQRELE(mp, gdqp);
|
|
|
|
/* Fall through to std_return with error = 0 or errno from
|
|
* xfs_trans_commit */
|
|
std_return:
|
|
if (DM_EVENT_ENABLED(dp, DM_EVENT_POSTSYMLINK)) {
|
|
(void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTSYMLINK,
|
|
dir_vp, DM_RIGHT_NULL,
|
|
error ? NULL : XFS_ITOV(ip),
|
|
DM_RIGHT_NULL, link_name, target_path,
|
|
0, error, 0);
|
|
}
|
|
|
|
if (!error) {
|
|
bhv_vnode_t *vp;
|
|
|
|
ASSERT(ip);
|
|
vp = XFS_ITOV(ip);
|
|
*vpp = vp;
|
|
}
|
|
return error;
|
|
|
|
error2:
|
|
IRELE(ip);
|
|
error1:
|
|
xfs_bmap_cancel(&free_list);
|
|
cancel_flags |= XFS_TRANS_ABORT;
|
|
error_return:
|
|
xfs_trans_cancel(tp, cancel_flags);
|
|
XFS_QM_DQRELE(mp, udqp);
|
|
XFS_QM_DQRELE(mp, gdqp);
|
|
|
|
if (unlock_dp_on_error)
|
|
xfs_iunlock(dp, XFS_ILOCK_EXCL);
|
|
|
|
goto std_return;
|
|
}
|
|
|
|
int
|
|
xfs_rwlock(
|
|
xfs_inode_t *ip,
|
|
bhv_vrwlock_t locktype)
|
|
{
|
|
if (S_ISDIR(ip->i_d.di_mode))
|
|
return 1;
|
|
if (locktype == VRWLOCK_WRITE) {
|
|
xfs_ilock(ip, XFS_IOLOCK_EXCL);
|
|
} else if (locktype == VRWLOCK_TRY_READ) {
|
|
return xfs_ilock_nowait(ip, XFS_IOLOCK_SHARED);
|
|
} else if (locktype == VRWLOCK_TRY_WRITE) {
|
|
return xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL);
|
|
} else {
|
|
ASSERT((locktype == VRWLOCK_READ) ||
|
|
(locktype == VRWLOCK_WRITE_DIRECT));
|
|
xfs_ilock(ip, XFS_IOLOCK_SHARED);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
void
|
|
xfs_rwunlock(
|
|
xfs_inode_t *ip,
|
|
bhv_vrwlock_t locktype)
|
|
{
|
|
if (S_ISDIR(ip->i_d.di_mode))
|
|
return;
|
|
if (locktype == VRWLOCK_WRITE) {
|
|
/*
|
|
* In the write case, we may have added a new entry to
|
|
* the reference cache. This might store a pointer to
|
|
* an inode to be released in this inode. If it is there,
|
|
* clear the pointer and release the inode after unlocking
|
|
* this one.
|
|
*/
|
|
xfs_refcache_iunlock(ip, XFS_IOLOCK_EXCL);
|
|
} else {
|
|
ASSERT((locktype == VRWLOCK_READ) ||
|
|
(locktype == VRWLOCK_WRITE_DIRECT));
|
|
xfs_iunlock(ip, XFS_IOLOCK_SHARED);
|
|
}
|
|
return;
|
|
}
|
|
|
|
|
|
int
|
|
xfs_inode_flush(
|
|
xfs_inode_t *ip,
|
|
int flags)
|
|
{
|
|
xfs_mount_t *mp = ip->i_mount;
|
|
xfs_inode_log_item_t *iip = ip->i_itemp;
|
|
int error = 0;
|
|
|
|
if (XFS_FORCED_SHUTDOWN(mp))
|
|
return XFS_ERROR(EIO);
|
|
|
|
/*
|
|
* Bypass inodes which have already been cleaned by
|
|
* the inode flush clustering code inside xfs_iflush
|
|
*/
|
|
if ((ip->i_update_core == 0) &&
|
|
((iip == NULL) || !(iip->ili_format.ilf_fields & XFS_ILOG_ALL)))
|
|
return 0;
|
|
|
|
if (flags & FLUSH_LOG) {
|
|
if (iip && iip->ili_last_lsn) {
|
|
xlog_t *log = mp->m_log;
|
|
xfs_lsn_t sync_lsn;
|
|
int log_flags = XFS_LOG_FORCE;
|
|
|
|
spin_lock(&log->l_grant_lock);
|
|
sync_lsn = log->l_last_sync_lsn;
|
|
spin_unlock(&log->l_grant_lock);
|
|
|
|
if ((XFS_LSN_CMP(iip->ili_last_lsn, sync_lsn) > 0)) {
|
|
if (flags & FLUSH_SYNC)
|
|
log_flags |= XFS_LOG_SYNC;
|
|
error = xfs_log_force(mp, iip->ili_last_lsn, log_flags);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
if (ip->i_update_core == 0)
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* We make this non-blocking if the inode is contended,
|
|
* return EAGAIN to indicate to the caller that they
|
|
* did not succeed. This prevents the flush path from
|
|
* blocking on inodes inside another operation right
|
|
* now, they get caught later by xfs_sync.
|
|
*/
|
|
if (flags & FLUSH_INODE) {
|
|
int flush_flags;
|
|
|
|
if (flags & FLUSH_SYNC) {
|
|
xfs_ilock(ip, XFS_ILOCK_SHARED);
|
|
xfs_iflock(ip);
|
|
} else if (xfs_ilock_nowait(ip, XFS_ILOCK_SHARED)) {
|
|
if (xfs_ipincount(ip) || !xfs_iflock_nowait(ip)) {
|
|
xfs_iunlock(ip, XFS_ILOCK_SHARED);
|
|
return EAGAIN;
|
|
}
|
|
} else {
|
|
return EAGAIN;
|
|
}
|
|
|
|
if (flags & FLUSH_SYNC)
|
|
flush_flags = XFS_IFLUSH_SYNC;
|
|
else
|
|
flush_flags = XFS_IFLUSH_ASYNC;
|
|
|
|
error = xfs_iflush(ip, flush_flags);
|
|
xfs_iunlock(ip, XFS_ILOCK_SHARED);
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
|
|
int
|
|
xfs_set_dmattrs(
|
|
xfs_inode_t *ip,
|
|
u_int evmask,
|
|
u_int16_t state)
|
|
{
|
|
xfs_mount_t *mp = ip->i_mount;
|
|
xfs_trans_t *tp;
|
|
int error;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return XFS_ERROR(EPERM);
|
|
|
|
if (XFS_FORCED_SHUTDOWN(mp))
|
|
return XFS_ERROR(EIO);
|
|
|
|
tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS);
|
|
error = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES (mp), 0, 0, 0);
|
|
if (error) {
|
|
xfs_trans_cancel(tp, 0);
|
|
return error;
|
|
}
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
|
|
|
|
ip->i_d.di_dmevmask = evmask;
|
|
ip->i_d.di_dmstate = state;
|
|
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
|
|
IHOLD(ip);
|
|
error = xfs_trans_commit(tp, 0);
|
|
|
|
return error;
|
|
}
|
|
|
|
int
|
|
xfs_reclaim(
|
|
xfs_inode_t *ip)
|
|
{
|
|
bhv_vnode_t *vp = XFS_ITOV(ip);
|
|
|
|
xfs_itrace_entry(ip);
|
|
|
|
ASSERT(!VN_MAPPED(vp));
|
|
|
|
/* bad inode, get out here ASAP */
|
|
if (VN_BAD(vp)) {
|
|
xfs_ireclaim(ip);
|
|
return 0;
|
|
}
|
|
|
|
vn_iowait(ip);
|
|
|
|
ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0);
|
|
|
|
/*
|
|
* Make sure the atime in the XFS inode is correct before freeing the
|
|
* Linux inode.
|
|
*/
|
|
xfs_synchronize_atime(ip);
|
|
|
|
/*
|
|
* If we have nothing to flush with this inode then complete the
|
|
* teardown now, otherwise break the link between the xfs inode and the
|
|
* linux inode and clean up the xfs inode later. This avoids flushing
|
|
* the inode to disk during the delete operation itself.
|
|
*
|
|
* When breaking the link, we need to set the XFS_IRECLAIMABLE flag
|
|
* first to ensure that xfs_iunpin() will never see an xfs inode
|
|
* that has a linux inode being reclaimed. Synchronisation is provided
|
|
* by the i_flags_lock.
|
|
*/
|
|
if (!ip->i_update_core && (ip->i_itemp == NULL)) {
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
xfs_iflock(ip);
|
|
return xfs_finish_reclaim(ip, 1, XFS_IFLUSH_DELWRI_ELSE_SYNC);
|
|
} else {
|
|
xfs_mount_t *mp = ip->i_mount;
|
|
|
|
/* Protect sync and unpin from us */
|
|
XFS_MOUNT_ILOCK(mp);
|
|
spin_lock(&ip->i_flags_lock);
|
|
__xfs_iflags_set(ip, XFS_IRECLAIMABLE);
|
|
vn_to_inode(vp)->i_private = NULL;
|
|
ip->i_vnode = NULL;
|
|
spin_unlock(&ip->i_flags_lock);
|
|
list_add_tail(&ip->i_reclaim, &mp->m_del_inodes);
|
|
XFS_MOUNT_IUNLOCK(mp);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
xfs_finish_reclaim(
|
|
xfs_inode_t *ip,
|
|
int locked,
|
|
int sync_mode)
|
|
{
|
|
xfs_perag_t *pag = xfs_get_perag(ip->i_mount, ip->i_ino);
|
|
bhv_vnode_t *vp = XFS_ITOV_NULL(ip);
|
|
int error;
|
|
|
|
if (vp && VN_BAD(vp))
|
|
goto reclaim;
|
|
|
|
/* The hash lock here protects a thread in xfs_iget_core from
|
|
* racing with us on linking the inode back with a vnode.
|
|
* Once we have the XFS_IRECLAIM flag set it will not touch
|
|
* us.
|
|
*/
|
|
write_lock(&pag->pag_ici_lock);
|
|
spin_lock(&ip->i_flags_lock);
|
|
if (__xfs_iflags_test(ip, XFS_IRECLAIM) ||
|
|
(!__xfs_iflags_test(ip, XFS_IRECLAIMABLE) && vp == NULL)) {
|
|
spin_unlock(&ip->i_flags_lock);
|
|
write_unlock(&pag->pag_ici_lock);
|
|
if (locked) {
|
|
xfs_ifunlock(ip);
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
}
|
|
return 1;
|
|
}
|
|
__xfs_iflags_set(ip, XFS_IRECLAIM);
|
|
spin_unlock(&ip->i_flags_lock);
|
|
write_unlock(&pag->pag_ici_lock);
|
|
xfs_put_perag(ip->i_mount, pag);
|
|
|
|
/*
|
|
* If the inode is still dirty, then flush it out. If the inode
|
|
* is not in the AIL, then it will be OK to flush it delwri as
|
|
* long as xfs_iflush() does not keep any references to the inode.
|
|
* We leave that decision up to xfs_iflush() since it has the
|
|
* knowledge of whether it's OK to simply do a delwri flush of
|
|
* the inode or whether we need to wait until the inode is
|
|
* pulled from the AIL.
|
|
* We get the flush lock regardless, though, just to make sure
|
|
* we don't free it while it is being flushed.
|
|
*/
|
|
if (!XFS_FORCED_SHUTDOWN(ip->i_mount)) {
|
|
if (!locked) {
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
xfs_iflock(ip);
|
|
}
|
|
|
|
if (ip->i_update_core ||
|
|
((ip->i_itemp != NULL) &&
|
|
(ip->i_itemp->ili_format.ilf_fields != 0))) {
|
|
error = xfs_iflush(ip, sync_mode);
|
|
/*
|
|
* If we hit an error, typically because of filesystem
|
|
* shutdown, we don't need to let vn_reclaim to know
|
|
* because we're gonna reclaim the inode anyway.
|
|
*/
|
|
if (error) {
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
goto reclaim;
|
|
}
|
|
xfs_iflock(ip); /* synchronize with xfs_iflush_done */
|
|
}
|
|
|
|
ASSERT(ip->i_update_core == 0);
|
|
ASSERT(ip->i_itemp == NULL ||
|
|
ip->i_itemp->ili_format.ilf_fields == 0);
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
} else if (locked) {
|
|
/*
|
|
* We are not interested in doing an iflush if we're
|
|
* in the process of shutting down the filesystem forcibly.
|
|
* So, just reclaim the inode.
|
|
*/
|
|
xfs_ifunlock(ip);
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
}
|
|
|
|
reclaim:
|
|
xfs_ireclaim(ip);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
xfs_finish_reclaim_all(xfs_mount_t *mp, int noblock)
|
|
{
|
|
int purged;
|
|
xfs_inode_t *ip, *n;
|
|
int done = 0;
|
|
|
|
while (!done) {
|
|
purged = 0;
|
|
XFS_MOUNT_ILOCK(mp);
|
|
list_for_each_entry_safe(ip, n, &mp->m_del_inodes, i_reclaim) {
|
|
if (noblock) {
|
|
if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0)
|
|
continue;
|
|
if (xfs_ipincount(ip) ||
|
|
!xfs_iflock_nowait(ip)) {
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
continue;
|
|
}
|
|
}
|
|
XFS_MOUNT_IUNLOCK(mp);
|
|
if (xfs_finish_reclaim(ip, noblock,
|
|
XFS_IFLUSH_DELWRI_ELSE_ASYNC))
|
|
delay(1);
|
|
purged = 1;
|
|
break;
|
|
}
|
|
|
|
done = !purged;
|
|
}
|
|
|
|
XFS_MOUNT_IUNLOCK(mp);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* xfs_alloc_file_space()
|
|
* This routine allocates disk space for the given file.
|
|
*
|
|
* If alloc_type == 0, this request is for an ALLOCSP type
|
|
* request which will change the file size. In this case, no
|
|
* DMAPI event will be generated by the call. A TRUNCATE event
|
|
* will be generated later by xfs_setattr.
|
|
*
|
|
* If alloc_type != 0, this request is for a RESVSP type
|
|
* request, and a DMAPI DM_EVENT_WRITE will be generated if the
|
|
* lower block boundary byte address is less than the file's
|
|
* length.
|
|
*
|
|
* RETURNS:
|
|
* 0 on success
|
|
* errno on error
|
|
*
|
|
*/
|
|
STATIC int
|
|
xfs_alloc_file_space(
|
|
xfs_inode_t *ip,
|
|
xfs_off_t offset,
|
|
xfs_off_t len,
|
|
int alloc_type,
|
|
int attr_flags)
|
|
{
|
|
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 bmapi_flag;
|
|
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;
|
|
|
|
xfs_itrace_entry(ip);
|
|
|
|
if (XFS_FORCED_SHUTDOWN(mp))
|
|
return XFS_ERROR(EIO);
|
|
|
|
if ((error = XFS_QM_DQATTACH(mp, ip, 0)))
|
|
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;
|
|
bmapi_flag = XFS_BMAPI_WRITE | (alloc_type ? XFS_BMAPI_PREALLOC : 0);
|
|
startoffset_fsb = XFS_B_TO_FSBT(mp, offset);
|
|
allocatesize_fsb = XFS_B_TO_FSB(mp, count);
|
|
|
|
/* Generate a DMAPI event if needed. */
|
|
if (alloc_type != 0 && offset < ip->i_size &&
|
|
(attr_flags&ATTR_DMI) == 0 &&
|
|
DM_EVENT_ENABLED(ip, DM_EVENT_WRITE)) {
|
|
xfs_off_t end_dmi_offset;
|
|
|
|
end_dmi_offset = offset+len;
|
|
if (end_dmi_offset > ip->i_size)
|
|
end_dmi_offset = ip->i_size;
|
|
error = XFS_SEND_DATA(mp, DM_EVENT_WRITE, XFS_ITOV(ip),
|
|
offset, end_dmi_offset - offset,
|
|
0, NULL);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Allocate file space until done or until there is an error
|
|
*/
|
|
retry:
|
|
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;
|
|
}
|
|
|
|
if (unlikely(rt)) {
|
|
resrtextents = qblocks = (uint)(e - s);
|
|
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, (uint)(e - s));
|
|
quota_flag = XFS_QMOPT_RES_REGBLKS;
|
|
}
|
|
|
|
/*
|
|
* Allocate and setup the transaction.
|
|
*/
|
|
tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT);
|
|
error = xfs_trans_reserve(tp, resblks,
|
|
XFS_WRITE_LOG_RES(mp), resrtextents,
|
|
XFS_TRANS_PERM_LOG_RES,
|
|
XFS_WRITE_LOG_COUNT);
|
|
/*
|
|
* 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(mp, tp, ip,
|
|
qblocks, 0, quota_flag);
|
|
if (error)
|
|
goto error1;
|
|
|
|
xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
|
|
xfs_trans_ihold(tp, ip);
|
|
|
|
/*
|
|
* Issue the xfs_bmapi() call to allocate the blocks
|
|
*/
|
|
XFS_BMAP_INIT(&free_list, &firstfsb);
|
|
error = xfs_bmapi(tp, ip, startoffset_fsb,
|
|
allocatesize_fsb, bmapi_flag,
|
|
&firstfsb, 0, imapp, &nimaps,
|
|
&free_list, NULL);
|
|
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;
|
|
}
|
|
dmapi_enospc_check:
|
|
if (error == ENOSPC && (attr_flags & ATTR_DMI) == 0 &&
|
|
DM_EVENT_ENABLED(ip, DM_EVENT_NOSPACE)) {
|
|
error = XFS_SEND_NAMESP(mp, DM_EVENT_NOSPACE,
|
|
XFS_ITOV(ip), DM_RIGHT_NULL,
|
|
XFS_ITOV(ip), DM_RIGHT_NULL,
|
|
NULL, NULL, 0, 0, 0); /* Delay flag intentionally unused */
|
|
if (error == 0)
|
|
goto retry; /* Maybe DMAPI app. has made space */
|
|
/* else fall through with error from XFS_SEND_DATA */
|
|
}
|
|
|
|
return error;
|
|
|
|
error0: /* Cancel bmap, unlock inode, unreserve quota blocks, cancel trans */
|
|
xfs_bmap_cancel(&free_list);
|
|
XFS_TRANS_UNRESERVE_QUOTA_NBLKS(mp, tp, ip, 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);
|
|
goto dmapi_enospc_check;
|
|
}
|
|
|
|
/*
|
|
* Zero file bytes between startoff and endoff inclusive.
|
|
* The iolock is held exclusive and no blocks are buffered.
|
|
*/
|
|
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;
|
|
|
|
bp = xfs_buf_get_noaddr(mp->m_sb.sb_blocksize,
|
|
XFS_IS_REALTIME_INODE(ip) ?
|
|
mp->m_rtdev_targp : mp->m_ddev_targp);
|
|
|
|
for (offset = startoff; offset <= endoff; offset = lastoffset + 1) {
|
|
offset_fsb = XFS_B_TO_FSBT(mp, offset);
|
|
nimap = 1;
|
|
error = xfs_bmapi(NULL, ip, offset_fsb, 1, 0,
|
|
NULL, 0, &imap, &nimap, NULL, NULL);
|
|
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);
|
|
if ((error = xfs_iowait(bp))) {
|
|
xfs_ioerror_alert("xfs_zero_remaining_bytes(read)",
|
|
mp, bp, XFS_BUF_ADDR(bp));
|
|
break;
|
|
}
|
|
memset(XFS_BUF_PTR(bp) +
|
|
(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);
|
|
if ((error = xfs_iowait(bp))) {
|
|
xfs_ioerror_alert("xfs_zero_remaining_bytes(write)",
|
|
mp, bp, XFS_BUF_ADDR(bp));
|
|
break;
|
|
}
|
|
}
|
|
xfs_buf_free(bp);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* xfs_free_file_space()
|
|
* This routine frees disk space for the given file.
|
|
*
|
|
* This routine is only called by xfs_change_file_space
|
|
* for an UNRESVSP type call.
|
|
*
|
|
* RETURNS:
|
|
* 0 on success
|
|
* errno on error
|
|
*
|
|
*/
|
|
STATIC int
|
|
xfs_free_file_space(
|
|
xfs_inode_t *ip,
|
|
xfs_off_t offset,
|
|
xfs_off_t len,
|
|
int attr_flags)
|
|
{
|
|
bhv_vnode_t *vp;
|
|
int committed;
|
|
int done;
|
|
xfs_off_t end_dmi_offset;
|
|
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;
|
|
uint rounding;
|
|
int rt;
|
|
xfs_fileoff_t startoffset_fsb;
|
|
xfs_trans_t *tp;
|
|
int need_iolock = 1;
|
|
|
|
vp = XFS_ITOV(ip);
|
|
mp = ip->i_mount;
|
|
|
|
xfs_itrace_entry(ip);
|
|
|
|
if ((error = XFS_QM_DQATTACH(mp, ip, 0)))
|
|
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);
|
|
end_dmi_offset = offset + len;
|
|
endoffset_fsb = XFS_B_TO_FSBT(mp, end_dmi_offset);
|
|
|
|
if (offset < ip->i_size && (attr_flags & ATTR_DMI) == 0 &&
|
|
DM_EVENT_ENABLED(ip, DM_EVENT_WRITE)) {
|
|
if (end_dmi_offset > ip->i_size)
|
|
end_dmi_offset = ip->i_size;
|
|
error = XFS_SEND_DATA(mp, DM_EVENT_WRITE, vp,
|
|
offset, end_dmi_offset - offset,
|
|
AT_DELAY_FLAG(attr_flags), NULL);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
if (attr_flags & ATTR_NOLOCK)
|
|
need_iolock = 0;
|
|
if (need_iolock) {
|
|
xfs_ilock(ip, XFS_IOLOCK_EXCL);
|
|
vn_iowait(ip); /* wait for the completion of any pending DIOs */
|
|
}
|
|
|
|
rounding = max_t(uint, 1 << mp->m_sb.sb_blocklog, PAGE_CACHE_SIZE);
|
|
ioffset = offset & ~(rounding - 1);
|
|
|
|
if (VN_CACHED(vp) != 0) {
|
|
xfs_inval_cached_trace(ip, ioffset, -1, ioffset, -1);
|
|
error = xfs_flushinval_pages(ip, ioffset, -1, FI_REMAPF_LOCKED);
|
|
if (error)
|
|
goto out_unlock_iolock;
|
|
}
|
|
|
|
/*
|
|
* Need to zero the stuff we're not freeing, on disk.
|
|
* If its 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(NULL, ip, startoffset_fsb,
|
|
1, 0, NULL, 0, &imap, &nimap, NULL, NULL);
|
|
if (error)
|
|
goto out_unlock_iolock;
|
|
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(NULL, ip, endoffset_fsb - 1,
|
|
1, 0, NULL, 0, &imap, &nimap, NULL, NULL);
|
|
if (error)
|
|
goto out_unlock_iolock;
|
|
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,
|
|
resblks,
|
|
XFS_WRITE_LOG_RES(mp),
|
|
0,
|
|
XFS_TRANS_PERM_LOG_RES,
|
|
XFS_WRITE_LOG_COUNT);
|
|
|
|
/*
|
|
* 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(mp, tp,
|
|
ip->i_udquot, ip->i_gdquot, resblks, 0,
|
|
XFS_QMOPT_RES_REGBLKS);
|
|
if (error)
|
|
goto error1;
|
|
|
|
xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
|
|
xfs_trans_ihold(tp, ip);
|
|
|
|
/*
|
|
* 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, NULL, &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_unlock_iolock:
|
|
if (need_iolock)
|
|
xfs_iunlock(ip, XFS_IOLOCK_EXCL);
|
|
return error;
|
|
|
|
error0:
|
|
xfs_bmap_cancel(&free_list);
|
|
error1:
|
|
xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
|
|
xfs_iunlock(ip, need_iolock ? (XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL) :
|
|
XFS_ILOCK_EXCL);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* xfs_change_file_space()
|
|
* This routine allocates or frees disk space for the given file.
|
|
* The user specified parameters are checked for alignment and size
|
|
* limitations.
|
|
*
|
|
* RETURNS:
|
|
* 0 on success
|
|
* errno on error
|
|
*
|
|
*/
|
|
int
|
|
xfs_change_file_space(
|
|
xfs_inode_t *ip,
|
|
int cmd,
|
|
xfs_flock64_t *bf,
|
|
xfs_off_t offset,
|
|
cred_t *credp,
|
|
int attr_flags)
|
|
{
|
|
xfs_mount_t *mp = ip->i_mount;
|
|
int clrprealloc;
|
|
int error;
|
|
xfs_fsize_t fsize;
|
|
int setprealloc;
|
|
xfs_off_t startoffset;
|
|
xfs_off_t llen;
|
|
xfs_trans_t *tp;
|
|
bhv_vattr_t va;
|
|
|
|
xfs_itrace_entry(ip);
|
|
|
|
if (!S_ISREG(ip->i_d.di_mode))
|
|
return XFS_ERROR(EINVAL);
|
|
|
|
switch (bf->l_whence) {
|
|
case 0: /*SEEK_SET*/
|
|
break;
|
|
case 1: /*SEEK_CUR*/
|
|
bf->l_start += offset;
|
|
break;
|
|
case 2: /*SEEK_END*/
|
|
bf->l_start += ip->i_size;
|
|
break;
|
|
default:
|
|
return XFS_ERROR(EINVAL);
|
|
}
|
|
|
|
llen = bf->l_len > 0 ? bf->l_len - 1 : bf->l_len;
|
|
|
|
if ( (bf->l_start < 0)
|
|
|| (bf->l_start > XFS_MAXIOFFSET(mp))
|
|
|| (bf->l_start + llen < 0)
|
|
|| (bf->l_start + llen > XFS_MAXIOFFSET(mp)))
|
|
return XFS_ERROR(EINVAL);
|
|
|
|
bf->l_whence = 0;
|
|
|
|
startoffset = bf->l_start;
|
|
fsize = ip->i_size;
|
|
|
|
/*
|
|
* XFS_IOC_RESVSP and XFS_IOC_UNRESVSP will reserve or unreserve
|
|
* file space.
|
|
* These calls do NOT zero the data space allocated to the file,
|
|
* nor do they change the file size.
|
|
*
|
|
* XFS_IOC_ALLOCSP and XFS_IOC_FREESP will allocate and free file
|
|
* space.
|
|
* These calls cause the new file data to be zeroed and the file
|
|
* size to be changed.
|
|
*/
|
|
setprealloc = clrprealloc = 0;
|
|
|
|
switch (cmd) {
|
|
case XFS_IOC_RESVSP:
|
|
case XFS_IOC_RESVSP64:
|
|
error = xfs_alloc_file_space(ip, startoffset, bf->l_len,
|
|
1, attr_flags);
|
|
if (error)
|
|
return error;
|
|
setprealloc = 1;
|
|
break;
|
|
|
|
case XFS_IOC_UNRESVSP:
|
|
case XFS_IOC_UNRESVSP64:
|
|
if ((error = xfs_free_file_space(ip, startoffset, bf->l_len,
|
|
attr_flags)))
|
|
return error;
|
|
break;
|
|
|
|
case XFS_IOC_ALLOCSP:
|
|
case XFS_IOC_ALLOCSP64:
|
|
case XFS_IOC_FREESP:
|
|
case XFS_IOC_FREESP64:
|
|
if (startoffset > fsize) {
|
|
error = xfs_alloc_file_space(ip, fsize,
|
|
startoffset - fsize, 0, attr_flags);
|
|
if (error)
|
|
break;
|
|
}
|
|
|
|
va.va_mask = XFS_AT_SIZE;
|
|
va.va_size = startoffset;
|
|
|
|
error = xfs_setattr(ip, &va, attr_flags, credp);
|
|
|
|
if (error)
|
|
return error;
|
|
|
|
clrprealloc = 1;
|
|
break;
|
|
|
|
default:
|
|
ASSERT(0);
|
|
return XFS_ERROR(EINVAL);
|
|
}
|
|
|
|
/*
|
|
* update the inode timestamp, mode, and prealloc flag bits
|
|
*/
|
|
tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID);
|
|
|
|
if ((error = xfs_trans_reserve(tp, 0, XFS_WRITEID_LOG_RES(mp),
|
|
0, 0, 0))) {
|
|
/* ASSERT(0); */
|
|
xfs_trans_cancel(tp, 0);
|
|
return error;
|
|
}
|
|
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
|
|
xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
|
|
xfs_trans_ihold(tp, ip);
|
|
|
|
if ((attr_flags & ATTR_DMI) == 0) {
|
|
ip->i_d.di_mode &= ~S_ISUID;
|
|
|
|
/*
|
|
* Note that we don't have to worry about mandatory
|
|
* file locking being disabled here because we only
|
|
* clear the S_ISGID bit if the Group execute bit is
|
|
* on, but if it was on then mandatory locking wouldn't
|
|
* have been enabled.
|
|
*/
|
|
if (ip->i_d.di_mode & S_IXGRP)
|
|
ip->i_d.di_mode &= ~S_ISGID;
|
|
|
|
xfs_ichgtime(ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
|
|
}
|
|
if (setprealloc)
|
|
ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC;
|
|
else if (clrprealloc)
|
|
ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC;
|
|
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
|
|
xfs_trans_set_sync(tp);
|
|
|
|
error = xfs_trans_commit(tp, 0);
|
|
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
|
|
return error;
|
|
}
|