5340f28b15
is being taken from panicing with either "freeing free block" or "freeing free inode". The problem arises when the snapshot code is scanning the filesystem looking for inodes with a reference count of zero (e.g., unlinked but still open) so that it can expunge them from its view. If it encounters a reclaimed vnode and has to restart its scan, then it will panic if it encounters and tries to free an inode that it has already processed. The fix is to check each candidate inode to see if it has already been processed before trying to delete it from the snapshot image. Sponsored by: DARPA & NAI Labs.
133 lines
5.7 KiB
C
133 lines
5.7 KiB
C
/*-
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* Copyright (c) 1991, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)ffs_extern.h 8.6 (Berkeley) 3/30/95
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* $FreeBSD$
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*/
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#ifndef _UFS_FFS_EXTERN_H
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#define _UFS_FFS_EXTERN_H
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struct buf;
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struct cg;
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struct fid;
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struct fs;
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struct inode;
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struct malloc_type;
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struct mount;
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struct thread;
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struct sockaddr;
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struct statfs;
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struct ucred;
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struct vnode;
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struct vop_fsync_args;
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struct vop_reallocblks_args;
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struct vop_copyonwrite_args;
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int ffs_alloc(struct inode *,
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ufs2_daddr_t, ufs2_daddr_t, int, struct ucred *, ufs2_daddr_t *);
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int ffs_balloc_ufs1(struct vnode *a_vp, off_t a_startoffset, int a_size,
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struct ucred *a_cred, int a_flags, struct buf **a_bpp);
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int ffs_balloc_ufs2(struct vnode *a_vp, off_t a_startoffset, int a_size,
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struct ucred *a_cred, int a_flags, struct buf **a_bpp);
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int ffs_blkatoff(struct vnode *, off_t, char **, struct buf **);
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void ffs_blkfree(struct fs *, struct vnode *, ufs2_daddr_t, long, ino_t);
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ufs2_daddr_t ffs_blkpref_ufs1(struct inode *, ufs_lbn_t, int, ufs1_daddr_t *);
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ufs2_daddr_t ffs_blkpref_ufs2(struct inode *, ufs_lbn_t, int, ufs2_daddr_t *);
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int ffs_checkfreefile(struct fs *, struct vnode *, ino_t);
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void ffs_clrblock(struct fs *, u_char *, ufs1_daddr_t);
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void ffs_clusteracct (struct fs *, struct cg *, ufs1_daddr_t, int);
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vfs_fhtovp_t ffs_fhtovp;
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int ffs_flushfiles(struct mount *, int, struct thread *);
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void ffs_fragacct(struct fs *, int, int32_t [], int);
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int ffs_freefile(struct fs *, struct vnode *, ino_t, int);
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int ffs_isblock(struct fs *, u_char *, ufs1_daddr_t);
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void ffs_load_inode(struct buf *, struct inode *, struct fs *, ino_t);
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int ffs_mountroot(void);
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vfs_mount_t ffs_mount;
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int ffs_reallocblks(struct vop_reallocblks_args *);
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int ffs_realloccg(struct inode *, ufs2_daddr_t, ufs2_daddr_t,
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ufs2_daddr_t, int, int, struct ucred *, struct buf **);
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void ffs_setblock(struct fs *, u_char *, ufs1_daddr_t);
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int ffs_snapblkfree(struct fs *, struct vnode *, ufs2_daddr_t, long, ino_t);
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void ffs_snapremove(struct vnode *vp);
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int ffs_snapshot(struct mount *mp, char *snapfile);
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void ffs_snapshot_mount(struct mount *mp);
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void ffs_snapshot_unmount(struct mount *mp);
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vfs_statfs_t ffs_statfs;
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vfs_sync_t ffs_sync;
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int ffs_truncate(struct vnode *, off_t, int, struct ucred *, struct thread *);
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vfs_unmount_t ffs_unmount;
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int ffs_update(struct vnode *, int);
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int ffs_valloc(struct vnode *, int, struct ucred *, struct vnode **);
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int ffs_vfree(struct vnode *, ino_t, int);
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vfs_vget_t ffs_vget;
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vfs_vptofh_t ffs_vptofh;
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extern vop_t **ffs_vnodeop_p;
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extern vop_t **ffs_specop_p;
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extern vop_t **ffs_fifoop_p;
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/*
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* Soft update function prototypes.
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*/
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void softdep_initialize(void);
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void softdep_uninitialize(void);
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int softdep_mount(struct vnode *, struct mount *, struct fs *,
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struct ucred *);
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int softdep_flushworklist(struct mount *, int *, struct thread *);
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int softdep_flushfiles(struct mount *, int, struct thread *);
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void softdep_update_inodeblock(struct inode *, struct buf *, int);
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void softdep_load_inodeblock(struct inode *);
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void softdep_freefile(struct vnode *, ino_t, int);
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int softdep_request_cleanup(struct fs *, struct vnode *);
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void softdep_setup_freeblocks(struct inode *, off_t, int);
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void softdep_setup_inomapdep(struct buf *, struct inode *, ino_t);
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void softdep_setup_blkmapdep(struct buf *, struct fs *, ufs2_daddr_t);
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void softdep_setup_allocdirect(struct inode *, ufs_lbn_t, ufs2_daddr_t,
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ufs2_daddr_t, long, long, struct buf *);
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void softdep_setup_allocext(struct inode *, ufs_lbn_t, ufs2_daddr_t,
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ufs2_daddr_t, long, long, struct buf *);
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void softdep_setup_allocindir_meta(struct buf *, struct inode *,
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struct buf *, int, ufs2_daddr_t);
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void softdep_setup_allocindir_page(struct inode *, ufs_lbn_t,
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struct buf *, int, ufs2_daddr_t, ufs2_daddr_t, struct buf *);
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void softdep_fsync_mountdev(struct vnode *);
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int softdep_sync_metadata(struct vop_fsync_args *);
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/* XXX incorrectly moved to mount.h - should be indirect function */
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#if 0
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int softdep_fsync(struct vnode *vp);
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#endif
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#endif /* !_UFS_FFS_EXTERN_H */
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