1012 lines
22 KiB
C
1012 lines
22 KiB
C
/*
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* Copyright (c) 2000-2005 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_bit.h"
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#include "xfs_log.h"
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#include "xfs_clnt.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_dir.h"
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#include "xfs_dir2.h"
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#include "xfs_alloc.h"
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#include "xfs_dmapi.h"
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#include "xfs_quota.h"
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#include "xfs_mount.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_dir_sf.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_btree.h"
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#include "xfs_ialloc.h"
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#include "xfs_bmap.h"
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#include "xfs_rtalloc.h"
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#include "xfs_error.h"
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#include "xfs_itable.h"
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#include "xfs_rw.h"
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#include "xfs_acl.h"
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#include "xfs_cap.h"
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#include "xfs_mac.h"
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#include "xfs_attr.h"
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#include "xfs_buf_item.h"
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#include "xfs_utils.h"
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#include "xfs_version.h"
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#include <linux/namei.h>
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#include <linux/init.h>
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#include <linux/mount.h>
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#include <linux/mempool.h>
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#include <linux/writeback.h>
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#include <linux/kthread.h>
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STATIC struct quotactl_ops linvfs_qops;
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STATIC struct super_operations linvfs_sops;
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STATIC kmem_zone_t *xfs_vnode_zone;
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STATIC kmem_zone_t *xfs_ioend_zone;
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mempool_t *xfs_ioend_pool;
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STATIC struct xfs_mount_args *
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xfs_args_allocate(
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struct super_block *sb)
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{
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struct xfs_mount_args *args;
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args = kmem_zalloc(sizeof(struct xfs_mount_args), KM_SLEEP);
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args->logbufs = args->logbufsize = -1;
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strncpy(args->fsname, sb->s_id, MAXNAMELEN);
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/* Copy the already-parsed mount(2) flags we're interested in */
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if (sb->s_flags & MS_NOATIME)
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args->flags |= XFSMNT_NOATIME;
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if (sb->s_flags & MS_DIRSYNC)
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args->flags |= XFSMNT_DIRSYNC;
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if (sb->s_flags & MS_SYNCHRONOUS)
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args->flags |= XFSMNT_WSYNC;
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/* Default to 32 bit inodes on Linux all the time */
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args->flags |= XFSMNT_32BITINODES;
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return args;
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}
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__uint64_t
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xfs_max_file_offset(
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unsigned int blockshift)
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{
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unsigned int pagefactor = 1;
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unsigned int bitshift = BITS_PER_LONG - 1;
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/* Figure out maximum filesize, on Linux this can depend on
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* the filesystem blocksize (on 32 bit platforms).
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* __block_prepare_write does this in an [unsigned] long...
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* page->index << (PAGE_CACHE_SHIFT - bbits)
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* So, for page sized blocks (4K on 32 bit platforms),
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* this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
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* (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
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* but for smaller blocksizes it is less (bbits = log2 bsize).
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* Note1: get_block_t takes a long (implicit cast from above)
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* Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
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* can optionally convert the [unsigned] long from above into
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* an [unsigned] long long.
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*/
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#if BITS_PER_LONG == 32
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# if defined(CONFIG_LBD)
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ASSERT(sizeof(sector_t) == 8);
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pagefactor = PAGE_CACHE_SIZE;
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bitshift = BITS_PER_LONG;
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# else
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pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift);
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# endif
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#endif
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return (((__uint64_t)pagefactor) << bitshift) - 1;
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}
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STATIC __inline__ void
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xfs_set_inodeops(
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struct inode *inode)
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{
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switch (inode->i_mode & S_IFMT) {
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case S_IFREG:
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inode->i_op = &linvfs_file_inode_operations;
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inode->i_fop = &linvfs_file_operations;
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inode->i_mapping->a_ops = &linvfs_aops;
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break;
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case S_IFDIR:
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inode->i_op = &linvfs_dir_inode_operations;
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inode->i_fop = &linvfs_dir_operations;
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break;
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case S_IFLNK:
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inode->i_op = &linvfs_symlink_inode_operations;
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if (inode->i_blocks)
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inode->i_mapping->a_ops = &linvfs_aops;
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break;
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default:
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inode->i_op = &linvfs_file_inode_operations;
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init_special_inode(inode, inode->i_mode, inode->i_rdev);
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break;
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}
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}
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STATIC __inline__ void
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xfs_revalidate_inode(
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xfs_mount_t *mp,
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vnode_t *vp,
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xfs_inode_t *ip)
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{
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struct inode *inode = LINVFS_GET_IP(vp);
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inode->i_mode = ip->i_d.di_mode;
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inode->i_nlink = ip->i_d.di_nlink;
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inode->i_uid = ip->i_d.di_uid;
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inode->i_gid = ip->i_d.di_gid;
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switch (inode->i_mode & S_IFMT) {
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case S_IFBLK:
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case S_IFCHR:
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inode->i_rdev =
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MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
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sysv_minor(ip->i_df.if_u2.if_rdev));
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break;
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default:
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inode->i_rdev = 0;
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break;
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}
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inode->i_blksize = xfs_preferred_iosize(mp);
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inode->i_generation = ip->i_d.di_gen;
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i_size_write(inode, ip->i_d.di_size);
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inode->i_blocks =
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XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
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inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec;
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inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec;
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inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec;
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inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec;
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inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec;
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inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec;
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if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE)
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inode->i_flags |= S_IMMUTABLE;
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else
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inode->i_flags &= ~S_IMMUTABLE;
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if (ip->i_d.di_flags & XFS_DIFLAG_APPEND)
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inode->i_flags |= S_APPEND;
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else
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inode->i_flags &= ~S_APPEND;
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if (ip->i_d.di_flags & XFS_DIFLAG_SYNC)
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inode->i_flags |= S_SYNC;
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else
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inode->i_flags &= ~S_SYNC;
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if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME)
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inode->i_flags |= S_NOATIME;
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else
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inode->i_flags &= ~S_NOATIME;
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vp->v_flag &= ~VMODIFIED;
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}
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void
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xfs_initialize_vnode(
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bhv_desc_t *bdp,
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vnode_t *vp,
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bhv_desc_t *inode_bhv,
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int unlock)
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{
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xfs_inode_t *ip = XFS_BHVTOI(inode_bhv);
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struct inode *inode = LINVFS_GET_IP(vp);
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if (!inode_bhv->bd_vobj) {
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vp->v_vfsp = bhvtovfs(bdp);
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bhv_desc_init(inode_bhv, ip, vp, &xfs_vnodeops);
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bhv_insert(VN_BHV_HEAD(vp), inode_bhv);
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}
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/*
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* We need to set the ops vectors, and unlock the inode, but if
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* we have been called during the new inode create process, it is
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* too early to fill in the Linux inode. We will get called a
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* second time once the inode is properly set up, and then we can
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* finish our work.
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*/
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if (ip->i_d.di_mode != 0 && unlock && (inode->i_state & I_NEW)) {
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xfs_revalidate_inode(XFS_BHVTOM(bdp), vp, ip);
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xfs_set_inodeops(inode);
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ip->i_flags &= ~XFS_INEW;
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barrier();
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unlock_new_inode(inode);
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}
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}
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int
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xfs_blkdev_get(
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xfs_mount_t *mp,
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const char *name,
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struct block_device **bdevp)
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{
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int error = 0;
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*bdevp = open_bdev_excl(name, 0, mp);
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if (IS_ERR(*bdevp)) {
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error = PTR_ERR(*bdevp);
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printk("XFS: Invalid device [%s], error=%d\n", name, error);
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}
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return -error;
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}
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void
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xfs_blkdev_put(
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struct block_device *bdev)
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{
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if (bdev)
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close_bdev_excl(bdev);
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}
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/*
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* Try to write out the superblock using barriers.
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*/
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STATIC int
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xfs_barrier_test(
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xfs_mount_t *mp)
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{
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xfs_buf_t *sbp = xfs_getsb(mp, 0);
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int error;
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XFS_BUF_UNDONE(sbp);
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XFS_BUF_UNREAD(sbp);
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XFS_BUF_UNDELAYWRITE(sbp);
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XFS_BUF_WRITE(sbp);
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XFS_BUF_UNASYNC(sbp);
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XFS_BUF_ORDERED(sbp);
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xfsbdstrat(mp, sbp);
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error = xfs_iowait(sbp);
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/*
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* Clear all the flags we set and possible error state in the
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* buffer. We only did the write to try out whether barriers
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* worked and shouldn't leave any traces in the superblock
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* buffer.
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*/
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XFS_BUF_DONE(sbp);
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XFS_BUF_ERROR(sbp, 0);
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XFS_BUF_UNORDERED(sbp);
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xfs_buf_relse(sbp);
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return error;
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}
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void
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xfs_mountfs_check_barriers(xfs_mount_t *mp)
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{
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int error;
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if (mp->m_logdev_targp != mp->m_ddev_targp) {
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xfs_fs_cmn_err(CE_NOTE, mp,
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"Disabling barriers, not supported with external log device");
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mp->m_flags &= ~XFS_MOUNT_BARRIER;
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}
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if (mp->m_ddev_targp->pbr_bdev->bd_disk->queue->ordered ==
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QUEUE_ORDERED_NONE) {
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xfs_fs_cmn_err(CE_NOTE, mp,
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"Disabling barriers, not supported by the underlying device");
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mp->m_flags &= ~XFS_MOUNT_BARRIER;
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}
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error = xfs_barrier_test(mp);
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if (error) {
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xfs_fs_cmn_err(CE_NOTE, mp,
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"Disabling barriers, trial barrier write failed");
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mp->m_flags &= ~XFS_MOUNT_BARRIER;
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}
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}
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void
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xfs_blkdev_issue_flush(
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xfs_buftarg_t *buftarg)
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{
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blkdev_issue_flush(buftarg->pbr_bdev, NULL);
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}
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STATIC struct inode *
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linvfs_alloc_inode(
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struct super_block *sb)
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{
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vnode_t *vp;
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vp = kmem_cache_alloc(xfs_vnode_zone, kmem_flags_convert(KM_SLEEP));
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if (!vp)
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return NULL;
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return LINVFS_GET_IP(vp);
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}
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STATIC void
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linvfs_destroy_inode(
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struct inode *inode)
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{
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kmem_zone_free(xfs_vnode_zone, LINVFS_GET_VP(inode));
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}
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STATIC void
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linvfs_inode_init_once(
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void *data,
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kmem_cache_t *cachep,
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unsigned long flags)
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{
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vnode_t *vp = (vnode_t *)data;
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if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
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SLAB_CTOR_CONSTRUCTOR)
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inode_init_once(LINVFS_GET_IP(vp));
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}
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STATIC int
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linvfs_init_zones(void)
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{
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xfs_vnode_zone = kmem_cache_create("xfs_vnode",
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sizeof(vnode_t), 0, SLAB_RECLAIM_ACCOUNT,
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linvfs_inode_init_once, NULL);
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if (!xfs_vnode_zone)
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goto out;
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xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend");
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if (!xfs_ioend_zone)
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goto out_destroy_vnode_zone;
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xfs_ioend_pool = mempool_create(4 * MAX_BUF_PER_PAGE,
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mempool_alloc_slab, mempool_free_slab,
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xfs_ioend_zone);
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if (!xfs_ioend_pool)
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goto out_free_ioend_zone;
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return 0;
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|
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out_free_ioend_zone:
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kmem_zone_destroy(xfs_ioend_zone);
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out_destroy_vnode_zone:
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kmem_zone_destroy(xfs_vnode_zone);
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out:
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return -ENOMEM;
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}
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STATIC void
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linvfs_destroy_zones(void)
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{
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mempool_destroy(xfs_ioend_pool);
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kmem_zone_destroy(xfs_vnode_zone);
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kmem_zone_destroy(xfs_ioend_zone);
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}
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/*
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* Attempt to flush the inode, this will actually fail
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* if the inode is pinned, but we dirty the inode again
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* at the point when it is unpinned after a log write,
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* since this is when the inode itself becomes flushable.
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*/
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STATIC int
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linvfs_write_inode(
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struct inode *inode,
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int sync)
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{
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vnode_t *vp = LINVFS_GET_VP(inode);
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int error = 0, flags = FLUSH_INODE;
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if (vp) {
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vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
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if (sync)
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flags |= FLUSH_SYNC;
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VOP_IFLUSH(vp, flags, error);
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if (error == EAGAIN) {
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if (sync)
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VOP_IFLUSH(vp, flags | FLUSH_LOG, error);
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else
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error = 0;
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}
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}
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|
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return -error;
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}
|
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|
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STATIC void
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linvfs_clear_inode(
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struct inode *inode)
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{
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vnode_t *vp = LINVFS_GET_VP(inode);
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int error, cache;
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|
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vn_trace_entry(vp, "clear_inode", (inst_t *)__return_address);
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XFS_STATS_INC(vn_rele);
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XFS_STATS_INC(vn_remove);
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XFS_STATS_INC(vn_reclaim);
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XFS_STATS_DEC(vn_active);
|
|
|
|
/*
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* This can happen because xfs_iget_core calls xfs_idestroy if we
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* find an inode with di_mode == 0 but without IGET_CREATE set.
|
|
*/
|
|
if (vp->v_fbhv)
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VOP_INACTIVE(vp, NULL, cache);
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|
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VN_LOCK(vp);
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vp->v_flag &= ~VMODIFIED;
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VN_UNLOCK(vp, 0);
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|
|
if (vp->v_fbhv) {
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VOP_RECLAIM(vp, error);
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if (error)
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panic("vn_purge: cannot reclaim");
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}
|
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|
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ASSERT(vp->v_fbhv == NULL);
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|
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#ifdef XFS_VNODE_TRACE
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ktrace_free(vp->v_trace);
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#endif
|
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}
|
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|
|
/*
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|
* Enqueue a work item to be picked up by the vfs xfssyncd thread.
|
|
* Doing this has two advantages:
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|
* - It saves on stack space, which is tight in certain situations
|
|
* - It can be used (with care) as a mechanism to avoid deadlocks.
|
|
* Flushing while allocating in a full filesystem requires both.
|
|
*/
|
|
STATIC void
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|
xfs_syncd_queue_work(
|
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struct vfs *vfs,
|
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void *data,
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void (*syncer)(vfs_t *, void *))
|
|
{
|
|
vfs_sync_work_t *work;
|
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|
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work = kmem_alloc(sizeof(struct vfs_sync_work), KM_SLEEP);
|
|
INIT_LIST_HEAD(&work->w_list);
|
|
work->w_syncer = syncer;
|
|
work->w_data = data;
|
|
work->w_vfs = vfs;
|
|
spin_lock(&vfs->vfs_sync_lock);
|
|
list_add_tail(&work->w_list, &vfs->vfs_sync_list);
|
|
spin_unlock(&vfs->vfs_sync_lock);
|
|
wake_up_process(vfs->vfs_sync_task);
|
|
}
|
|
|
|
/*
|
|
* Flush delayed allocate data, attempting to free up reserved space
|
|
* from existing allocations. At this point a new allocation attempt
|
|
* has failed with ENOSPC and we are in the process of scratching our
|
|
* heads, looking about for more room...
|
|
*/
|
|
STATIC void
|
|
xfs_flush_inode_work(
|
|
vfs_t *vfs,
|
|
void *inode)
|
|
{
|
|
filemap_flush(((struct inode *)inode)->i_mapping);
|
|
iput((struct inode *)inode);
|
|
}
|
|
|
|
void
|
|
xfs_flush_inode(
|
|
xfs_inode_t *ip)
|
|
{
|
|
struct inode *inode = LINVFS_GET_IP(XFS_ITOV(ip));
|
|
struct vfs *vfs = XFS_MTOVFS(ip->i_mount);
|
|
|
|
igrab(inode);
|
|
xfs_syncd_queue_work(vfs, inode, xfs_flush_inode_work);
|
|
delay(msecs_to_jiffies(500));
|
|
}
|
|
|
|
/*
|
|
* This is the "bigger hammer" version of xfs_flush_inode_work...
|
|
* (IOW, "If at first you don't succeed, use a Bigger Hammer").
|
|
*/
|
|
STATIC void
|
|
xfs_flush_device_work(
|
|
vfs_t *vfs,
|
|
void *inode)
|
|
{
|
|
sync_blockdev(vfs->vfs_super->s_bdev);
|
|
iput((struct inode *)inode);
|
|
}
|
|
|
|
void
|
|
xfs_flush_device(
|
|
xfs_inode_t *ip)
|
|
{
|
|
struct inode *inode = LINVFS_GET_IP(XFS_ITOV(ip));
|
|
struct vfs *vfs = XFS_MTOVFS(ip->i_mount);
|
|
|
|
igrab(inode);
|
|
xfs_syncd_queue_work(vfs, inode, xfs_flush_device_work);
|
|
delay(msecs_to_jiffies(500));
|
|
xfs_log_force(ip->i_mount, (xfs_lsn_t)0, XFS_LOG_FORCE|XFS_LOG_SYNC);
|
|
}
|
|
|
|
#define SYNCD_FLAGS (SYNC_FSDATA|SYNC_BDFLUSH|SYNC_ATTR)
|
|
STATIC void
|
|
vfs_sync_worker(
|
|
vfs_t *vfsp,
|
|
void *unused)
|
|
{
|
|
int error;
|
|
|
|
if (!(vfsp->vfs_flag & VFS_RDONLY))
|
|
VFS_SYNC(vfsp, SYNCD_FLAGS, NULL, error);
|
|
vfsp->vfs_sync_seq++;
|
|
wmb();
|
|
wake_up(&vfsp->vfs_wait_single_sync_task);
|
|
}
|
|
|
|
STATIC int
|
|
xfssyncd(
|
|
void *arg)
|
|
{
|
|
long timeleft;
|
|
vfs_t *vfsp = (vfs_t *) arg;
|
|
struct vfs_sync_work *work, *n;
|
|
LIST_HEAD (tmp);
|
|
|
|
timeleft = xfs_syncd_centisecs * msecs_to_jiffies(10);
|
|
for (;;) {
|
|
timeleft = schedule_timeout_interruptible(timeleft);
|
|
/* swsusp */
|
|
try_to_freeze();
|
|
if (kthread_should_stop())
|
|
break;
|
|
|
|
spin_lock(&vfsp->vfs_sync_lock);
|
|
/*
|
|
* We can get woken by laptop mode, to do a sync -
|
|
* that's the (only!) case where the list would be
|
|
* empty with time remaining.
|
|
*/
|
|
if (!timeleft || list_empty(&vfsp->vfs_sync_list)) {
|
|
if (!timeleft)
|
|
timeleft = xfs_syncd_centisecs *
|
|
msecs_to_jiffies(10);
|
|
INIT_LIST_HEAD(&vfsp->vfs_sync_work.w_list);
|
|
list_add_tail(&vfsp->vfs_sync_work.w_list,
|
|
&vfsp->vfs_sync_list);
|
|
}
|
|
list_for_each_entry_safe(work, n, &vfsp->vfs_sync_list, w_list)
|
|
list_move(&work->w_list, &tmp);
|
|
spin_unlock(&vfsp->vfs_sync_lock);
|
|
|
|
list_for_each_entry_safe(work, n, &tmp, w_list) {
|
|
(*work->w_syncer)(vfsp, work->w_data);
|
|
list_del(&work->w_list);
|
|
if (work == &vfsp->vfs_sync_work)
|
|
continue;
|
|
kmem_free(work, sizeof(struct vfs_sync_work));
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
STATIC int
|
|
linvfs_start_syncd(
|
|
vfs_t *vfsp)
|
|
{
|
|
vfsp->vfs_sync_work.w_syncer = vfs_sync_worker;
|
|
vfsp->vfs_sync_work.w_vfs = vfsp;
|
|
vfsp->vfs_sync_task = kthread_run(xfssyncd, vfsp, "xfssyncd");
|
|
if (IS_ERR(vfsp->vfs_sync_task))
|
|
return -PTR_ERR(vfsp->vfs_sync_task);
|
|
return 0;
|
|
}
|
|
|
|
STATIC void
|
|
linvfs_stop_syncd(
|
|
vfs_t *vfsp)
|
|
{
|
|
kthread_stop(vfsp->vfs_sync_task);
|
|
}
|
|
|
|
STATIC void
|
|
linvfs_put_super(
|
|
struct super_block *sb)
|
|
{
|
|
vfs_t *vfsp = LINVFS_GET_VFS(sb);
|
|
int error;
|
|
|
|
linvfs_stop_syncd(vfsp);
|
|
VFS_SYNC(vfsp, SYNC_ATTR|SYNC_DELWRI, NULL, error);
|
|
if (!error)
|
|
VFS_UNMOUNT(vfsp, 0, NULL, error);
|
|
if (error) {
|
|
printk("XFS unmount got error %d\n", error);
|
|
printk("%s: vfsp/0x%p left dangling!\n", __FUNCTION__, vfsp);
|
|
return;
|
|
}
|
|
|
|
vfs_deallocate(vfsp);
|
|
}
|
|
|
|
STATIC void
|
|
linvfs_write_super(
|
|
struct super_block *sb)
|
|
{
|
|
vfs_t *vfsp = LINVFS_GET_VFS(sb);
|
|
int error;
|
|
|
|
if (sb->s_flags & MS_RDONLY) {
|
|
sb->s_dirt = 0; /* paranoia */
|
|
return;
|
|
}
|
|
/* Push the log and superblock a little */
|
|
VFS_SYNC(vfsp, SYNC_FSDATA, NULL, error);
|
|
sb->s_dirt = 0;
|
|
}
|
|
|
|
STATIC int
|
|
linvfs_sync_super(
|
|
struct super_block *sb,
|
|
int wait)
|
|
{
|
|
vfs_t *vfsp = LINVFS_GET_VFS(sb);
|
|
int error;
|
|
int flags = SYNC_FSDATA;
|
|
|
|
if (unlikely(sb->s_frozen == SB_FREEZE_WRITE))
|
|
flags = SYNC_QUIESCE;
|
|
else
|
|
flags = SYNC_FSDATA | (wait ? SYNC_WAIT : 0);
|
|
|
|
VFS_SYNC(vfsp, flags, NULL, error);
|
|
sb->s_dirt = 0;
|
|
|
|
if (unlikely(laptop_mode)) {
|
|
int prev_sync_seq = vfsp->vfs_sync_seq;
|
|
|
|
/*
|
|
* The disk must be active because we're syncing.
|
|
* We schedule xfssyncd now (now that the disk is
|
|
* active) instead of later (when it might not be).
|
|
*/
|
|
wake_up_process(vfsp->vfs_sync_task);
|
|
/*
|
|
* We have to wait for the sync iteration to complete.
|
|
* If we don't, the disk activity caused by the sync
|
|
* will come after the sync is completed, and that
|
|
* triggers another sync from laptop mode.
|
|
*/
|
|
wait_event(vfsp->vfs_wait_single_sync_task,
|
|
vfsp->vfs_sync_seq != prev_sync_seq);
|
|
}
|
|
|
|
return -error;
|
|
}
|
|
|
|
STATIC int
|
|
linvfs_statfs(
|
|
struct super_block *sb,
|
|
struct kstatfs *statp)
|
|
{
|
|
vfs_t *vfsp = LINVFS_GET_VFS(sb);
|
|
int error;
|
|
|
|
VFS_STATVFS(vfsp, statp, NULL, error);
|
|
return -error;
|
|
}
|
|
|
|
STATIC int
|
|
linvfs_remount(
|
|
struct super_block *sb,
|
|
int *flags,
|
|
char *options)
|
|
{
|
|
vfs_t *vfsp = LINVFS_GET_VFS(sb);
|
|
struct xfs_mount_args *args = xfs_args_allocate(sb);
|
|
int error;
|
|
|
|
VFS_PARSEARGS(vfsp, options, args, 1, error);
|
|
if (!error)
|
|
VFS_MNTUPDATE(vfsp, flags, args, error);
|
|
kmem_free(args, sizeof(*args));
|
|
return -error;
|
|
}
|
|
|
|
STATIC void
|
|
linvfs_freeze_fs(
|
|
struct super_block *sb)
|
|
{
|
|
VFS_FREEZE(LINVFS_GET_VFS(sb));
|
|
}
|
|
|
|
STATIC int
|
|
linvfs_show_options(
|
|
struct seq_file *m,
|
|
struct vfsmount *mnt)
|
|
{
|
|
struct vfs *vfsp = LINVFS_GET_VFS(mnt->mnt_sb);
|
|
int error;
|
|
|
|
VFS_SHOWARGS(vfsp, m, error);
|
|
return error;
|
|
}
|
|
|
|
STATIC int
|
|
linvfs_quotasync(
|
|
struct super_block *sb,
|
|
int type)
|
|
{
|
|
struct vfs *vfsp = LINVFS_GET_VFS(sb);
|
|
int error;
|
|
|
|
VFS_QUOTACTL(vfsp, Q_XQUOTASYNC, 0, (caddr_t)NULL, error);
|
|
return -error;
|
|
}
|
|
|
|
STATIC int
|
|
linvfs_getxstate(
|
|
struct super_block *sb,
|
|
struct fs_quota_stat *fqs)
|
|
{
|
|
struct vfs *vfsp = LINVFS_GET_VFS(sb);
|
|
int error;
|
|
|
|
VFS_QUOTACTL(vfsp, Q_XGETQSTAT, 0, (caddr_t)fqs, error);
|
|
return -error;
|
|
}
|
|
|
|
STATIC int
|
|
linvfs_setxstate(
|
|
struct super_block *sb,
|
|
unsigned int flags,
|
|
int op)
|
|
{
|
|
struct vfs *vfsp = LINVFS_GET_VFS(sb);
|
|
int error;
|
|
|
|
VFS_QUOTACTL(vfsp, op, 0, (caddr_t)&flags, error);
|
|
return -error;
|
|
}
|
|
|
|
STATIC int
|
|
linvfs_getxquota(
|
|
struct super_block *sb,
|
|
int type,
|
|
qid_t id,
|
|
struct fs_disk_quota *fdq)
|
|
{
|
|
struct vfs *vfsp = LINVFS_GET_VFS(sb);
|
|
int error, getmode;
|
|
|
|
getmode = (type == USRQUOTA) ? Q_XGETQUOTA :
|
|
((type == GRPQUOTA) ? Q_XGETGQUOTA : Q_XGETPQUOTA);
|
|
VFS_QUOTACTL(vfsp, getmode, id, (caddr_t)fdq, error);
|
|
return -error;
|
|
}
|
|
|
|
STATIC int
|
|
linvfs_setxquota(
|
|
struct super_block *sb,
|
|
int type,
|
|
qid_t id,
|
|
struct fs_disk_quota *fdq)
|
|
{
|
|
struct vfs *vfsp = LINVFS_GET_VFS(sb);
|
|
int error, setmode;
|
|
|
|
setmode = (type == USRQUOTA) ? Q_XSETQLIM :
|
|
((type == GRPQUOTA) ? Q_XSETGQLIM : Q_XSETPQLIM);
|
|
VFS_QUOTACTL(vfsp, setmode, id, (caddr_t)fdq, error);
|
|
return -error;
|
|
}
|
|
|
|
STATIC int
|
|
linvfs_fill_super(
|
|
struct super_block *sb,
|
|
void *data,
|
|
int silent)
|
|
{
|
|
vnode_t *rootvp;
|
|
struct vfs *vfsp = vfs_allocate();
|
|
struct xfs_mount_args *args = xfs_args_allocate(sb);
|
|
struct kstatfs statvfs;
|
|
int error, error2;
|
|
|
|
vfsp->vfs_super = sb;
|
|
LINVFS_SET_VFS(sb, vfsp);
|
|
if (sb->s_flags & MS_RDONLY)
|
|
vfsp->vfs_flag |= VFS_RDONLY;
|
|
bhv_insert_all_vfsops(vfsp);
|
|
|
|
VFS_PARSEARGS(vfsp, (char *)data, args, 0, error);
|
|
if (error) {
|
|
bhv_remove_all_vfsops(vfsp, 1);
|
|
goto fail_vfsop;
|
|
}
|
|
|
|
sb_min_blocksize(sb, BBSIZE);
|
|
#ifdef CONFIG_XFS_EXPORT
|
|
sb->s_export_op = &linvfs_export_ops;
|
|
#endif
|
|
sb->s_qcop = &linvfs_qops;
|
|
sb->s_op = &linvfs_sops;
|
|
|
|
VFS_MOUNT(vfsp, args, NULL, error);
|
|
if (error) {
|
|
bhv_remove_all_vfsops(vfsp, 1);
|
|
goto fail_vfsop;
|
|
}
|
|
|
|
VFS_STATVFS(vfsp, &statvfs, NULL, error);
|
|
if (error)
|
|
goto fail_unmount;
|
|
|
|
sb->s_dirt = 1;
|
|
sb->s_magic = statvfs.f_type;
|
|
sb->s_blocksize = statvfs.f_bsize;
|
|
sb->s_blocksize_bits = ffs(statvfs.f_bsize) - 1;
|
|
sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
|
|
sb->s_time_gran = 1;
|
|
set_posix_acl_flag(sb);
|
|
|
|
VFS_ROOT(vfsp, &rootvp, error);
|
|
if (error)
|
|
goto fail_unmount;
|
|
|
|
sb->s_root = d_alloc_root(LINVFS_GET_IP(rootvp));
|
|
if (!sb->s_root) {
|
|
error = ENOMEM;
|
|
goto fail_vnrele;
|
|
}
|
|
if (is_bad_inode(sb->s_root->d_inode)) {
|
|
error = EINVAL;
|
|
goto fail_vnrele;
|
|
}
|
|
if ((error = linvfs_start_syncd(vfsp)))
|
|
goto fail_vnrele;
|
|
vn_trace_exit(rootvp, __FUNCTION__, (inst_t *)__return_address);
|
|
|
|
kmem_free(args, sizeof(*args));
|
|
return 0;
|
|
|
|
fail_vnrele:
|
|
if (sb->s_root) {
|
|
dput(sb->s_root);
|
|
sb->s_root = NULL;
|
|
} else {
|
|
VN_RELE(rootvp);
|
|
}
|
|
|
|
fail_unmount:
|
|
VFS_UNMOUNT(vfsp, 0, NULL, error2);
|
|
|
|
fail_vfsop:
|
|
vfs_deallocate(vfsp);
|
|
kmem_free(args, sizeof(*args));
|
|
return -error;
|
|
}
|
|
|
|
STATIC struct super_block *
|
|
linvfs_get_sb(
|
|
struct file_system_type *fs_type,
|
|
int flags,
|
|
const char *dev_name,
|
|
void *data)
|
|
{
|
|
return get_sb_bdev(fs_type, flags, dev_name, data, linvfs_fill_super);
|
|
}
|
|
|
|
STATIC struct super_operations linvfs_sops = {
|
|
.alloc_inode = linvfs_alloc_inode,
|
|
.destroy_inode = linvfs_destroy_inode,
|
|
.write_inode = linvfs_write_inode,
|
|
.clear_inode = linvfs_clear_inode,
|
|
.put_super = linvfs_put_super,
|
|
.write_super = linvfs_write_super,
|
|
.sync_fs = linvfs_sync_super,
|
|
.write_super_lockfs = linvfs_freeze_fs,
|
|
.statfs = linvfs_statfs,
|
|
.remount_fs = linvfs_remount,
|
|
.show_options = linvfs_show_options,
|
|
};
|
|
|
|
STATIC struct quotactl_ops linvfs_qops = {
|
|
.quota_sync = linvfs_quotasync,
|
|
.get_xstate = linvfs_getxstate,
|
|
.set_xstate = linvfs_setxstate,
|
|
.get_xquota = linvfs_getxquota,
|
|
.set_xquota = linvfs_setxquota,
|
|
};
|
|
|
|
STATIC struct file_system_type xfs_fs_type = {
|
|
.owner = THIS_MODULE,
|
|
.name = "xfs",
|
|
.get_sb = linvfs_get_sb,
|
|
.kill_sb = kill_block_super,
|
|
.fs_flags = FS_REQUIRES_DEV,
|
|
};
|
|
|
|
|
|
STATIC int __init
|
|
init_xfs_fs( void )
|
|
{
|
|
int error;
|
|
struct sysinfo si;
|
|
static char message[] __initdata = KERN_INFO \
|
|
XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled\n";
|
|
|
|
printk(message);
|
|
|
|
si_meminfo(&si);
|
|
xfs_physmem = si.totalram;
|
|
|
|
ktrace_init(64);
|
|
|
|
error = linvfs_init_zones();
|
|
if (error < 0)
|
|
goto undo_zones;
|
|
|
|
error = pagebuf_init();
|
|
if (error < 0)
|
|
goto undo_pagebuf;
|
|
|
|
vn_init();
|
|
xfs_init();
|
|
uuid_init();
|
|
vfs_initquota();
|
|
|
|
error = register_filesystem(&xfs_fs_type);
|
|
if (error)
|
|
goto undo_register;
|
|
XFS_DM_INIT(&xfs_fs_type);
|
|
return 0;
|
|
|
|
undo_register:
|
|
pagebuf_terminate();
|
|
|
|
undo_pagebuf:
|
|
linvfs_destroy_zones();
|
|
|
|
undo_zones:
|
|
return error;
|
|
}
|
|
|
|
STATIC void __exit
|
|
exit_xfs_fs( void )
|
|
{
|
|
vfs_exitquota();
|
|
XFS_DM_EXIT(&xfs_fs_type);
|
|
unregister_filesystem(&xfs_fs_type);
|
|
xfs_cleanup();
|
|
pagebuf_terminate();
|
|
linvfs_destroy_zones();
|
|
ktrace_uninit();
|
|
}
|
|
|
|
module_init(init_xfs_fs);
|
|
module_exit(exit_xfs_fs);
|
|
|
|
MODULE_AUTHOR("Silicon Graphics, Inc.");
|
|
MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
|
|
MODULE_LICENSE("GPL");
|