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- /*-
- * Copyright 1998, 2000 Marshall Kirk McKusick. All Rights Reserved.
- *
- * The soft updates code is derived from the appendix of a University
- * of Michigan technical report (Gregory R. Ganger and Yale N. Patt,
- * "Soft Updates: A Solution to the Metadata Update Problem in File
- * Systems", CSE-TR-254-95, August 1995).
- *
- * Further information about soft updates can be obtained from:
- *
- * Marshall Kirk McKusick http://www.mckusick.com/softdep/
- * 1614 Oxford Street mckusick@mckusick.com
- * Berkeley, CA 94709-1608 +1-510-843-9542
- * USA
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY MARSHALL KIRK MCKUSICK ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL MARSHALL KIRK MCKUSICK BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * @(#)softdep.h 9.7 (McKusick) 6/21/00
- * $FreeBSD$
- */
- typedef struct Fs Fs;
- /*
- * Allocation dependencies are handled with undo/redo on the in-memory
- * copy of the data. A particular data dependency is eliminated when
- * it is ALLCOMPLETE: that is ATTACHED, DEPCOMPLETE, and COMPLETE.
- *
- * The ATTACHED flag means that the data is not currently being written
- * to disk.
- *
- * The UNDONE flag means that the data has been rolled back to a safe
- * state for writing to the disk. When the I/O completes, the data is
- * restored to its current form and the state reverts to ATTACHED.
- * The data must be locked throughout the rollback, I/O, and roll
- * forward so that the rolled back information is never visible to
- * user processes.
- *
- * The COMPLETE flag indicates that the item has been written. For example,
- * a dependency that requires that an inode be written will be marked
- * COMPLETE after the inode has been written to disk.
- *
- * The DEPCOMPLETE flag indicates the completion of any other
- * dependencies such as the writing of a cylinder group map has been
- * completed. A dependency structure may be freed only when both it
- * and its dependencies have completed and any rollbacks that are in
- * progress have finished as indicated by the set of ALLCOMPLETE flags
- * all being set.
- *
- * The two MKDIR flags indicate additional dependencies that must be done
- * when creating a new directory. MKDIR_BODY is cleared when the directory
- * data block containing the "." and ".." entries has been written.
- * MKDIR_PARENT is cleared when the parent inode with the increased link
- * count for ".." has been written. When both MKDIR flags have been
- * cleared, the DEPCOMPLETE flag is set to indicate that the directory
- * dependencies have been completed. The writing of the directory inode
- * itself sets the COMPLETE flag which then allows the directory entry for
- * the new directory to be written to disk. The RMDIR flag marks a dirrem
- * structure as representing the removal of a directory rather than a
- * file. When the removal dependencies are completed, additional work needs
- * to be done* (an additional decrement of the associated inode, and a
- * decrement of the parent inode).
- *
- * The DIRCHG flag marks a diradd structure as representing the changing
- * of an existing entry rather than the addition of a new one. When
- * the update is complete the dirrem associated with the inode for
- * the old name must be added to the worklist to do the necessary
- * reference count decrement.
- *
- * The GOINGAWAY flag indicates that the data structure is frozen from
- * further change until its dependencies have been completed and its
- * resources freed after which it will be discarded.
- *
- * The IOSTARTED flag prevents multiple calls to the I/O start routine from
- * doing multiple rollbacks.
- *
- * The NEWBLOCK flag marks pagedep structures that have just been allocated,
- * so must be claimed by the inode before all dependencies are complete.
- *
- * The INPROGRESS flag marks worklist structures that are still on the
- * worklist, but are being considered for action by some process.
- *
- * The UFS1FMT flag indicates that the inode being processed is a ufs1 format.
- *
- * The EXTDATA flag indicates that the allocdirect describes an
- * extended-attributes dependency.
- *
- * The ONWORKLIST flag shows whether the structure is currently linked
- * onto a worklist.
- *
- * The UNLINK* flags track the progress of updating the on-disk linked
- * list of active but unlinked inodes. When an inode is first unlinked
- * it is marked as UNLINKED. When its on-disk di_freelink has been
- * written its UNLINKNEXT flags is set. When its predecessor in the
- * list has its di_freelink pointing at us its UNLINKPREV is set.
- * When the on-disk list can reach it from the superblock, its
- * UNLINKONLIST flag is set. Once all of these flags are set, it
- * is safe to let its last name be removed.
- */
- #define ATTACHED 0x000001
- #define UNDONE 0x000002
- #define COMPLETE 0x000004
- #define DEPCOMPLETE 0x000008
- #define MKDIR_PARENT 0x000010 /* diradd, mkdir, jaddref, jsegdep only */
- #define MKDIR_BODY 0x000020 /* diradd, mkdir, jaddref only */
- #define RMDIR 0x000040 /* dirrem only */
- #define DIRCHG 0x000080 /* diradd, dirrem only */
- #define GOINGAWAY 0x000100 /* indirdep, jremref only */
- #define IOSTARTED 0x000200 /* inodedep, pagedep, bmsafemap only */
- #define DELAYEDFREE 0x000400 /* allocindirect free delayed. */
- #define NEWBLOCK 0x000800 /* pagedep, jaddref only */
- #define INPROGRESS 0x001000 /* dirrem, freeblks, freefrag, freefile only */
- #define UFS1FMT 0x002000 /* indirdep only */
- #define EXTDATA 0x004000 /* allocdirect only */
- #define ONWORKLIST 0x008000
- #define IOWAITING 0x010000 /* Thread is waiting for IO to complete. */
- #define ONDEPLIST 0x020000 /* Structure is on a dependency list. */
- #define UNLINKED 0x040000 /* inodedep has been unlinked. */
- #define UNLINKNEXT 0x080000 /* inodedep has valid di_freelink */
- #define UNLINKPREV 0x100000 /* inodedep is pointed at in the unlink list */
- #define UNLINKONLIST 0x200000 /* inodedep is in the unlinked list on disk */
- #define UNLINKLINKS (UNLINKNEXT | UNLINKPREV)
- #define WRITESUCCEEDED 0x400000 /* the disk write completed successfully */
- #define ALLCOMPLETE (ATTACHED | COMPLETE | DEPCOMPLETE)
- /*
- * Values for each of the soft dependency types.
- */
- #define D_PAGEDEP 0
- #define D_INODEDEP 1
- #define D_BMSAFEMAP 2
- #define D_NEWBLK 3
- #define D_ALLOCDIRECT 4
- #define D_INDIRDEP 5
- #define D_ALLOCINDIR 6
- #define D_FREEFRAG 7
- #define D_FREEBLKS 8
- #define D_FREEFILE 9
- #define D_DIRADD 10
- #define D_MKDIR 11
- #define D_DIRREM 12
- #define D_NEWDIRBLK 13
- #define D_FREEWORK 14
- #define D_FREEDEP 15
- #define D_JADDREF 16
- #define D_JREMREF 17
- #define D_JMVREF 18
- #define D_JNEWBLK 19
- #define D_JFREEBLK 20
- #define D_JFREEFRAG 21
- #define D_JSEG 22
- #define D_JSEGDEP 23
- #define D_SBDEP 24
- #define D_JTRUNC 25
- #define D_JFSYNC 26
- #define D_SENTINEL 27
- #define D_LAST D_SENTINEL
- /*
- * The workitem queue.
- *
- * It is sometimes useful and/or necessary to clean up certain dependencies
- * in the background rather than during execution of an application process
- * or interrupt service routine. To realize this, we append dependency
- * structures corresponding to such tasks to a "workitem" queue. In a soft
- * updates implementation, most pending workitems should not wait for more
- * than a couple of seconds, so the filesystem syncer process awakens once
- * per second to process the items on the queue.
- */
- LIST_HEAD(workhead, worklist);
- /*
- * Each request can be linked onto a work queue through its worklist structure.
- * To avoid the need for a pointer to the structure itself, this structure
- * MUST be declared FIRST in each type in which it appears! If more than one
- * worklist is needed in the structure, then a wk_data field must be added
- * and the macros below changed to use it.
- */
- struct worklist {
- LIST_ENTRY(worklist) wk_list; /* list of work requests */
- struct mount *wk_mp; /* Mount we live in */
- unsigned int wk_type:8, /* type of request */
- wk_state:24; /* state flags */
- };
- #define WK_DATA(wk) ((void *)(wk))
- #define WK_PAGEDEP(wk) ((struct pagedep *)(wk))
- #define WK_INODEDEP(wk) ((struct inodedep *)(wk))
- #define WK_BMSAFEMAP(wk) ((struct bmsafemap *)(wk))
- #define WK_NEWBLK(wk) ((struct newblk *)(wk))
- #define WK_ALLOCDIRECT(wk) ((struct allocdirect *)(wk))
- #define WK_INDIRDEP(wk) ((struct indirdep *)(wk))
- #define WK_ALLOCINDIR(wk) ((struct allocindir *)(wk))
- #define WK_FREEFRAG(wk) ((struct freefrag *)(wk))
- #define WK_FREEBLKS(wk) ((struct freeblks *)(wk))
- #define WK_FREEWORK(wk) ((struct freework *)(wk))
- #define WK_FREEFILE(wk) ((struct freefile *)(wk))
- #define WK_DIRADD(wk) ((struct diradd *)(wk))
- #define WK_MKDIR(wk) ((struct mkdir *)(wk))
- #define WK_DIRREM(wk) ((struct dirrem *)(wk))
- #define WK_NEWDIRBLK(wk) ((struct newdirblk *)(wk))
- #define WK_JADDREF(wk) ((struct jaddref *)(wk))
- #define WK_JREMREF(wk) ((struct jremref *)(wk))
- #define WK_JMVREF(wk) ((struct jmvref *)(wk))
- #define WK_JSEGDEP(wk) ((struct jsegdep *)(wk))
- #define WK_JSEG(wk) ((struct jseg *)(wk))
- #define WK_JNEWBLK(wk) ((struct jnewblk *)(wk))
- #define WK_JFREEBLK(wk) ((struct jfreeblk *)(wk))
- #define WK_FREEDEP(wk) ((struct freedep *)(wk))
- #define WK_JFREEFRAG(wk) ((struct jfreefrag *)(wk))
- #define WK_SBDEP(wk) ((struct sbdep *)(wk))
- #define WK_JTRUNC(wk) ((struct jtrunc *)(wk))
- #define WK_JFSYNC(wk) ((struct jfsync *)(wk))
- /*
- * Various types of lists
- */
- LIST_HEAD(dirremhd, dirrem);
- LIST_HEAD(diraddhd, diradd);
- LIST_HEAD(newblkhd, newblk);
- LIST_HEAD(inodedephd, inodedep);
- LIST_HEAD(allocindirhd, allocindir);
- LIST_HEAD(allocdirecthd, allocdirect);
- TAILQ_HEAD(allocdirectlst, allocdirect);
- LIST_HEAD(indirdephd, indirdep);
- LIST_HEAD(jaddrefhd, jaddref);
- LIST_HEAD(jremrefhd, jremref);
- LIST_HEAD(jmvrefhd, jmvref);
- LIST_HEAD(jnewblkhd, jnewblk);
- LIST_HEAD(jblkdephd, jblkdep);
- LIST_HEAD(freeworkhd, freework);
- TAILQ_HEAD(freeworklst, freework);
- TAILQ_HEAD(jseglst, jseg);
- TAILQ_HEAD(inoreflst, inoref);
- TAILQ_HEAD(freeblklst, freeblks);
- /*
- * The "pagedep" structure tracks the various dependencies related to
- * a particular directory page. If a directory page has any dependencies,
- * it will have a pagedep linked to its associated buffer. The
- * pd_dirremhd list holds the list of dirrem requests which decrement
- * inode reference counts. These requests are processed after the
- * directory page with the corresponding zero'ed entries has been
- * written. The pd_diraddhd list maintains the list of diradd requests
- * which cannot be committed until their corresponding inode has been
- * written to disk. Because a directory may have many new entries
- * being created, several lists are maintained hashed on bits of the
- * offset of the entry into the directory page to keep the lists from
- * getting too long. Once a new directory entry has been cleared to
- * be written, it is moved to the pd_pendinghd list. After the new
- * entry has been written to disk it is removed from the pd_pendinghd
- * list, any removed operations are done, and the dependency structure
- * is freed.
- */
- #define DAHASHSZ 5
- #define DIRADDHASH(offset) (((offset) >> 2) % DAHASHSZ)
- struct pagedep {
- struct worklist pd_list; /* page buffer */
- # define pd_state pd_list.wk_state /* check for multiple I/O starts */
- LIST_ENTRY(pagedep) pd_hash; /* hashed lookup */
- ino_t pd_ino; /* associated file */
- ufs_lbn_t pd_lbn; /* block within file */
- struct newdirblk *pd_newdirblk; /* associated newdirblk if NEWBLOCK */
- struct dirremhd pd_dirremhd; /* dirrem's waiting for page */
- struct diraddhd pd_diraddhd[DAHASHSZ]; /* diradd dir entry updates */
- struct diraddhd pd_pendinghd; /* directory entries awaiting write */
- struct jmvrefhd pd_jmvrefhd; /* Dependent journal writes. */
- };
- /*
- * The "inodedep" structure tracks the set of dependencies associated
- * with an inode. One task that it must manage is delayed operations
- * (i.e., work requests that must be held until the inodedep's associated
- * inode has been written to disk). Getting an inode from its incore
- * state to the disk requires two steps to be taken by the filesystem
- * in this order: first the inode must be copied to its disk buffer by
- * the VOP_UPDATE operation; second the inode's buffer must be written
- * to disk. To ensure that both operations have happened in the required
- * order, the inodedep maintains two lists. Delayed operations are
- * placed on the id_inowait list. When the VOP_UPDATE is done, all
- * operations on the id_inowait list are moved to the id_bufwait list.
- * When the buffer is written, the items on the id_bufwait list can be
- * safely moved to the work queue to be processed. A second task of the
- * inodedep structure is to track the status of block allocation within
- * the inode. Each block that is allocated is represented by an
- * "allocdirect" structure (see below). It is linked onto the id_newinoupdt
- * list until both its contents and its allocation in the cylinder
- * group map have been written to disk. Once these dependencies have been
- * satisfied, it is removed from the id_newinoupdt list and any followup
- * actions such as releasing the previous block or fragment are placed
- * on the id_inowait list. When an inode is updated (a VOP_UPDATE is
- * done), the "inodedep" structure is linked onto the buffer through
- * its worklist. Thus, it will be notified when the buffer is about
- * to be written and when it is done. At the update time, all the
- * elements on the id_newinoupdt list are moved to the id_inoupdt list
- * since those changes are now relevant to the copy of the inode in the
- * buffer. Also at update time, the tasks on the id_inowait list are
- * moved to the id_bufwait list so that they will be executed when
- * the updated inode has been written to disk. When the buffer containing
- * the inode is written to disk, any updates listed on the id_inoupdt
- * list are rolled back as they are not yet safe. Following the write,
- * the changes are once again rolled forward and any actions on the
- * id_bufwait list are processed (since those actions are now safe).
- * The entries on the id_inoupdt and id_newinoupdt lists must be kept
- * sorted by logical block number to speed the calculation of the size
- * of the rolled back inode (see explanation in initiate_write_inodeblock).
- * When a directory entry is created, it is represented by a diradd.
- * The diradd is added to the id_inowait list as it cannot be safely
- * written to disk until the inode that it represents is on disk. After
- * the inode is written, the id_bufwait list is processed and the diradd
- * entries are moved to the id_pendinghd list where they remain until
- * the directory block containing the name has been written to disk.
- * The purpose of keeping the entries on the id_pendinghd list is so that
- * the softdep_fsync function can find and push the inode's directory
- * name(s) as part of the fsync operation for that file.
- */
- struct inodedep {
- struct worklist id_list; /* buffer holding inode block */
- # define id_state id_list.wk_state /* inode dependency state */
- LIST_ENTRY(inodedep) id_hash; /* hashed lookup */
- TAILQ_ENTRY(inodedep) id_unlinked; /* Unlinked but ref'd inodes */
- Fs *id_fs; /* associated filesystem */
- ino_t id_ino; /* dependent inode */
- nlink_t id_nlinkdelta; /* saved effective link count */
- nlink_t id_savednlink; /* Link saved during rollback */
- LIST_ENTRY(inodedep) id_deps; /* bmsafemap's list of inodedep's */
- struct bmsafemap *id_bmsafemap; /* related bmsafemap (if pending) */
- struct diradd *id_mkdiradd; /* diradd for a mkdir. */
- struct inoreflst id_inoreflst; /* Inode reference adjustments. */
- long id_savedextsize; /* ext size saved during rollback */
- off_t id_savedsize; /* file size saved during rollback */
- struct dirremhd id_dirremhd; /* Removals pending. */
- struct workhead id_pendinghd; /* entries awaiting directory write */
- struct workhead id_bufwait; /* operations after inode written */
- struct workhead id_inowait; /* operations waiting inode update */
- struct allocdirectlst id_inoupdt; /* updates before inode written */
- struct allocdirectlst id_newinoupdt; /* updates when inode written */
- struct allocdirectlst id_extupdt; /* extdata updates pre-inode write */
- struct allocdirectlst id_newextupdt; /* extdata updates at ino write */
- struct freeblklst id_freeblklst; /* List of partial truncates. */
- union {
- struct ufs1_dinode *idu_savedino1; /* saved ufs1_dinode contents */
- struct ufs2_dinode *idu_savedino2; /* saved ufs2_dinode contents */
- } id_un;
- };
- #define id_savedino1 id_un.idu_savedino1
- #define id_savedino2 id_un.idu_savedino2
- /*
- * A "bmsafemap" structure maintains a list of dependency structures
- * that depend on the update of a particular cylinder group map.
- * It has lists for newblks, allocdirects, allocindirs, and inodedeps.
- * It is attached to the buffer of a cylinder group block when any of
- * these things are allocated from the cylinder group. It is freed
- * after the cylinder group map is written and the state of its
- * dependencies are updated with DEPCOMPLETE to indicate that it has
- * been processed.
- */
- struct bmsafemap {
- struct worklist sm_list; /* cylgrp buffer */
- # define sm_state sm_list.wk_state
- LIST_ENTRY(bmsafemap) sm_hash; /* Hash links. */
- LIST_ENTRY(bmsafemap) sm_next; /* Mount list. */
- int sm_cg;
- struct buf *sm_buf; /* associated buffer */
- struct allocdirecthd sm_allocdirecthd; /* allocdirect deps */
- struct allocdirecthd sm_allocdirectwr; /* writing allocdirect deps */
- struct allocindirhd sm_allocindirhd; /* allocindir deps */
- struct allocindirhd sm_allocindirwr; /* writing allocindir deps */
- struct inodedephd sm_inodedephd; /* inodedep deps */
- struct inodedephd sm_inodedepwr; /* writing inodedep deps */
- struct newblkhd sm_newblkhd; /* newblk deps */
- struct newblkhd sm_newblkwr; /* writing newblk deps */
- struct jaddrefhd sm_jaddrefhd; /* Pending inode allocations. */
- struct jnewblkhd sm_jnewblkhd; /* Pending block allocations. */
- struct workhead sm_freehd; /* Freedep deps. */
- struct workhead sm_freewr; /* Written freedeps. */
- };
- /*
- * A "newblk" structure is attached to a bmsafemap structure when a block
- * or fragment is allocated from a cylinder group. Its state is set to
- * DEPCOMPLETE when its cylinder group map is written. It is converted to
- * an allocdirect or allocindir allocation once the allocator calls the
- * appropriate setup function. It will initially be linked onto a bmsafemap
- * list. Once converted it can be linked onto the lists described for
- * allocdirect or allocindir as described below.
- */
- struct newblk {
- struct worklist nb_list; /* See comment above. */
- # define nb_state nb_list.wk_state
- LIST_ENTRY(newblk) nb_hash; /* Hashed lookup. */
- LIST_ENTRY(newblk) nb_deps; /* Bmsafemap's list of newblks. */
- struct jnewblk *nb_jnewblk; /* New block journal entry. */
- struct bmsafemap *nb_bmsafemap;/* Cylgrp dep (if pending). */
- struct freefrag *nb_freefrag; /* Fragment to be freed (if any). */
- struct indirdephd nb_indirdeps; /* Children indirect blocks. */
- struct workhead nb_newdirblk; /* Dir block to notify when written. */
- struct workhead nb_jwork; /* Journal work pending. */
- ufs2_daddr_t nb_newblkno; /* New value of block pointer. */
- };
- /*
- * An "allocdirect" structure is attached to an "inodedep" when a new block
- * or fragment is allocated and pointed to by the inode described by
- * "inodedep". The worklist is linked to the buffer that holds the block.
- * When the block is first allocated, it is linked to the bmsafemap
- * structure associated with the buffer holding the cylinder group map
- * from which it was allocated. When the cylinder group map is written
- * to disk, ad_state has the DEPCOMPLETE flag set. When the block itself
- * is written, the COMPLETE flag is set. Once both the cylinder group map
- * and the data itself have been written, it is safe to write the inode
- * that claims the block. If there was a previous fragment that had been
- * allocated before the file was increased in size, the old fragment may
- * be freed once the inode claiming the new block is written to disk.
- * This ad_fragfree request is attached to the id_inowait list of the
- * associated inodedep (pointed to by ad_inodedep) for processing after
- * the inode is written. When a block is allocated to a directory, an
- * fsync of a file whose name is within that block must ensure not only
- * that the block containing the file name has been written, but also
- * that the on-disk inode references that block. When a new directory
- * block is created, we allocate a newdirblk structure which is linked
- * to the associated allocdirect (on its ad_newdirblk list). When the
- * allocdirect has been satisfied, the newdirblk structure is moved to
- * the inodedep id_bufwait list of its directory to await the inode
- * being written. When the inode is written, the directory entries are
- * fully committed and can be deleted from their pagedep->id_pendinghd
- * and inodedep->id_pendinghd lists.
- */
- struct allocdirect {
- struct newblk ad_block; /* Common block logic */
- # define ad_list ad_block.nb_list /* block pointer worklist */
- # define ad_state ad_list.wk_state /* block pointer state */
- TAILQ_ENTRY(allocdirect) ad_next; /* inodedep's list of allocdirect's */
- struct inodedep *ad_inodedep; /* associated inodedep */
- ufs2_daddr_t ad_oldblkno; /* old value of block pointer */
- int ad_offset; /* Pointer offset in parent. */
- long ad_newsize; /* size of new block */
- long ad_oldsize; /* size of old block */
- };
- #define ad_newblkno ad_block.nb_newblkno
- #define ad_freefrag ad_block.nb_freefrag
- #define ad_newdirblk ad_block.nb_newdirblk
- /*
- * A single "indirdep" structure manages all allocation dependencies for
- * pointers in an indirect block. The up-to-date state of the indirect
- * block is stored in ir_savedata. The set of pointers that may be safely
- * written to the disk is stored in ir_safecopy. The state field is used
- * only to track whether the buffer is currently being written (in which
- * case it is not safe to update ir_safecopy). Ir_deplisthd contains the
- * list of allocindir structures, one for each block that needs to be
- * written to disk. Once the block and its bitmap allocation have been
- * written the safecopy can be updated to reflect the allocation and the
- * allocindir structure freed. If ir_state indicates that an I/O on the
- * indirect block is in progress when ir_safecopy is to be updated, the
- * update is deferred by placing the allocindir on the ir_donehd list.
- * When the I/O on the indirect block completes, the entries on the
- * ir_donehd list are processed by updating their corresponding ir_safecopy
- * pointers and then freeing the allocindir structure.
- */
- struct indirdep {
- struct worklist ir_list; /* buffer holding indirect block */
- # define ir_state ir_list.wk_state /* indirect block pointer state */
- LIST_ENTRY(indirdep) ir_next; /* alloc{direct,indir} list */
- TAILQ_HEAD(, freework) ir_trunc; /* List of truncations. */
- caddr_t ir_saveddata; /* buffer cache contents */
- struct buf *ir_savebp; /* buffer holding safe copy */
- struct buf *ir_bp; /* buffer holding live copy */
- struct allocindirhd ir_completehd; /* waiting for indirdep complete */
- struct allocindirhd ir_writehd; /* Waiting for the pointer write. */
- struct allocindirhd ir_donehd; /* done waiting to update safecopy */
- struct allocindirhd ir_deplisthd; /* allocindir deps for this block */
- struct freeblks *ir_freeblks; /* Freeblks that frees this indir. */
- };
- /*
- * An "allocindir" structure is attached to an "indirdep" when a new block
- * is allocated and pointed to by the indirect block described by the
- * "indirdep". The worklist is linked to the buffer that holds the new block.
- * When the block is first allocated, it is linked to the bmsafemap
- * structure associated with the buffer holding the cylinder group map
- * from which it was allocated. When the cylinder group map is written
- * to disk, ai_state has the DEPCOMPLETE flag set. When the block itself
- * is written, the COMPLETE flag is set. Once both the cylinder group map
- * and the data itself have been written, it is safe to write the entry in
- * the indirect block that claims the block; the "allocindir" dependency
- * can then be freed as it is no longer applicable.
- */
- struct allocindir {
- struct newblk ai_block; /* Common block area */
- # define ai_state ai_block.nb_list.wk_state /* indirect pointer state */
- LIST_ENTRY(allocindir) ai_next; /* indirdep's list of allocindir's */
- struct indirdep *ai_indirdep; /* address of associated indirdep */
- ufs2_daddr_t ai_oldblkno; /* old value of block pointer */
- ufs_lbn_t ai_lbn; /* Logical block number. */
- int ai_offset; /* Pointer offset in parent. */
- };
- #define ai_newblkno ai_block.nb_newblkno
- #define ai_freefrag ai_block.nb_freefrag
- #define ai_newdirblk ai_block.nb_newdirblk
- /*
- * The allblk union is used to size the newblk structure on allocation so
- * that it may be any one of three types.
- */
- union allblk {
- struct allocindir ab_allocindir;
- struct allocdirect ab_allocdirect;
- struct newblk ab_newblk;
- };
- /*
- * A "freefrag" structure is attached to an "inodedep" when a previously
- * allocated fragment is replaced with a larger fragment, rather than extended.
- * The "freefrag" structure is constructed and attached when the replacement
- * block is first allocated. It is processed after the inode claiming the
- * bigger block that replaces it has been written to disk.
- */
- struct freefrag {
- struct worklist ff_list; /* id_inowait or delayed worklist */
- # define ff_state ff_list.wk_state
- struct worklist *ff_jdep; /* Associated journal entry. */
- struct workhead ff_jwork; /* Journal work pending. */
- ufs2_daddr_t ff_blkno; /* fragment physical block number */
- long ff_fragsize; /* size of fragment being deleted */
- ino_t ff_inum; /* owning inode number */
- enum vtype ff_vtype; /* owning inode's file type */
- };
- /*
- * A "freeblks" structure is attached to an "inodedep" when the
- * corresponding file's length is reduced to zero. It records all
- * the information needed to free the blocks of a file after its
- * zero'ed inode has been written to disk. The actual work is done
- * by child freework structures which are responsible for individual
- * inode pointers while freeblks is responsible for retiring the
- * entire operation when it is complete and holding common members.
- */
- struct freeblks {
- struct worklist fb_list; /* id_inowait or delayed worklist */
- # define fb_state fb_list.wk_state /* inode and dirty block state */
- TAILQ_ENTRY(freeblks) fb_next; /* List of inode truncates. */
- struct jblkdephd fb_jblkdephd; /* Journal entries pending */
- struct workhead fb_freeworkhd; /* Work items pending */
- struct workhead fb_jwork; /* Journal work pending */
- struct vnode *fb_devvp; /* filesystem device vnode */
- #ifdef QUOTA
- struct dquot *fb_quota[MAXQUOTAS]; /* quotas to be adjusted */
- #endif
- uint64_t fb_modrev; /* Inode revision at start of trunc. */
- off_t fb_len; /* Length we're truncating to. */
- ufs2_daddr_t fb_chkcnt; /* Blocks released. */
- ino_t fb_inum; /* inode owner of blocks */
- enum vtype fb_vtype; /* inode owner's file type */
- uid_t fb_uid; /* uid of previous owner of blocks */
- int fb_ref; /* Children outstanding. */
- int fb_cgwait; /* cg writes outstanding. */
- };
- /*
- * A "freework" structure handles the release of a tree of blocks or a single
- * block. Each indirect block in a tree is allocated its own freework
- * structure so that the indirect block may be freed only when all of its
- * children are freed. In this way we enforce the rule that an allocated
- * block must have a valid path to a root that is journaled. Each child
- * block acquires a reference and when the ref hits zero the parent ref
- * is decremented. If there is no parent the freeblks ref is decremented.
- */
- struct freework {
- struct worklist fw_list; /* Delayed worklist. */
- # define fw_state fw_list.wk_state
- LIST_ENTRY(freework) fw_segs; /* Seg list. */
- TAILQ_ENTRY(freework) fw_next; /* Hash/Trunc list. */
- struct jnewblk *fw_jnewblk; /* Journal entry to cancel. */
- struct freeblks *fw_freeblks; /* Root of operation. */
- struct freework *fw_parent; /* Parent indirect. */
- struct indirdep *fw_indir; /* indirect block. */
- ufs2_daddr_t fw_blkno; /* Our block #. */
- ufs_lbn_t fw_lbn; /* Original lbn before free. */
- uint16_t fw_frags; /* Number of frags. */
- uint16_t fw_ref; /* Number of children out. */
- uint16_t fw_off; /* Current working position. */
- uint16_t fw_start; /* Start of partial truncate. */
- };
- /*
- * A "freedep" structure is allocated to track the completion of a bitmap
- * write for a freework. One freedep may cover many freed blocks so long
- * as they reside in the same cylinder group. When the cg is written
- * the freedep decrements the ref on the freework which may permit it
- * to be freed as well.
- */
- struct freedep {
- struct worklist fd_list; /* Delayed worklist. */
- struct freework *fd_freework; /* Parent freework. */
- };
- /*
- * A "freefile" structure is attached to an inode when its
- * link count is reduced to zero. It marks the inode as free in
- * the cylinder group map after the zero'ed inode has been written
- * to disk and any associated blocks and fragments have been freed.
- */
- struct freefile {
- struct worklist fx_list; /* id_inowait or delayed worklist */
- mode_t fx_mode; /* mode of inode */
- ino_t fx_oldinum; /* inum of the unlinked file */
- struct vnode *fx_devvp; /* filesystem device vnode */
- struct workhead fx_jwork; /* journal work pending. */
- };
- /*
- * A "diradd" structure is linked to an "inodedep" id_inowait list when a
- * new directory entry is allocated that references the inode described
- * by "inodedep". When the inode itself is written (either the initial
- * allocation for new inodes or with the increased link count for
- * existing inodes), the COMPLETE flag is set in da_state. If the entry
- * is for a newly allocated inode, the "inodedep" structure is associated
- * with a bmsafemap which prevents the inode from being written to disk
- * until the cylinder group has been updated. Thus the da_state COMPLETE
- * flag cannot be set until the inode bitmap dependency has been removed.
- * When creating a new file, it is safe to write the directory entry that
- * claims the inode once the referenced inode has been written. Since
- * writing the inode clears the bitmap dependencies, the DEPCOMPLETE flag
- * in the diradd can be set unconditionally when creating a file. When
- * creating a directory, there are two additional dependencies described by
- * mkdir structures (see their description below). When these dependencies
- * are resolved the DEPCOMPLETE flag is set in the diradd structure.
- * If there are multiple links created to the same inode, there will be
- * a separate diradd structure created for each link. The diradd is
- * linked onto the pg_diraddhd list of the pagedep for the directory
- * page that contains the entry. When a directory page is written,
- * the pg_diraddhd list is traversed to rollback any entries that are
- * not yet ready to be written to disk. If a directory entry is being
- * changed (by rename) rather than added, the DIRCHG flag is set and
- * the da_previous entry points to the entry that will be "removed"
- * once the new entry has been committed. During rollback, entries
- * with da_previous are replaced with the previous inode number rather
- * than zero.
- *
- * The overlaying of da_pagedep and da_previous is done to keep the
- * structure down. If a da_previous entry is present, the pointer to its
- * pagedep is available in the associated dirrem entry. If the DIRCHG flag
- * is set, the da_previous entry is valid; if not set the da_pagedep entry
- * is valid. The DIRCHG flag never changes; it is set when the structure
- * is created if appropriate and is never cleared.
- */
- struct diradd {
- struct worklist da_list; /* id_inowait or id_pendinghd list */
- # define da_state da_list.wk_state /* state of the new directory entry */
- LIST_ENTRY(diradd) da_pdlist; /* pagedep holding directory block */
- doff_t da_offset; /* offset of new dir entry in dir blk */
- ino_t da_newinum; /* inode number for the new dir entry */
- union {
- struct dirrem *dau_previous; /* entry being replaced in dir change */
- struct pagedep *dau_pagedep; /* pagedep dependency for addition */
- } da_un;
- struct workhead da_jwork; /* Journal work awaiting completion. */
- };
- #define da_previous da_un.dau_previous
- #define da_pagedep da_un.dau_pagedep
- /*
- * Two "mkdir" structures are needed to track the additional dependencies
- * associated with creating a new directory entry. Normally a directory
- * addition can be committed as soon as the newly referenced inode has been
- * written to disk with its increased link count. When a directory is
- * created there are two additional dependencies: writing the directory
- * data block containing the "." and ".." entries (MKDIR_BODY) and writing
- * the parent inode with the increased link count for ".." (MKDIR_PARENT).
- * These additional dependencies are tracked by two mkdir structures that
- * reference the associated "diradd" structure. When they have completed,
- * they set the DEPCOMPLETE flag on the diradd so that it knows that its
- * extra dependencies have been completed. The md_state field is used only
- * to identify which type of dependency the mkdir structure is tracking.
- * It is not used in the mainline code for any purpose other than consistency
- * checking. All the mkdir structures in the system are linked together on
- * a list. This list is needed so that a diradd can find its associated
- * mkdir structures and deallocate them if it is prematurely freed (as for
- * example if a mkdir is immediately followed by a rmdir of the same directory).
- * Here, the free of the diradd must traverse the list to find the associated
- * mkdir structures that reference it. The deletion would be faster if the
- * diradd structure were simply augmented to have two pointers that referenced
- * the associated mkdir's. However, this would increase the size of the diradd
- * structure to speed a very infrequent operation.
- */
- struct mkdir {
- struct worklist md_list; /* id_inowait or buffer holding dir */
- # define md_state md_list.wk_state /* type: MKDIR_PARENT or MKDIR_BODY */
- struct diradd *md_diradd; /* associated diradd */
- struct jaddref *md_jaddref; /* dependent jaddref. */
- struct buf *md_buf; /* MKDIR_BODY: buffer holding dir */
- LIST_ENTRY(mkdir) md_mkdirs; /* list of all mkdirs */
- };
- /*
- * A "dirrem" structure describes an operation to decrement the link
- * count on an inode. The dirrem structure is attached to the pg_dirremhd
- * list of the pagedep for the directory page that contains the entry.
- * It is processed after the directory page with the deleted entry has
- * been written to disk.
- */
- struct dirrem {
- struct worklist dm_list; /* delayed worklist */
- # define dm_state dm_list.wk_state /* state of the old directory entry */
- LIST_ENTRY(dirrem) dm_next; /* pagedep's list of dirrem's */
- LIST_ENTRY(dirrem) dm_inonext; /* inodedep's list of dirrem's */
- struct jremrefhd dm_jremrefhd; /* Pending remove reference deps. */
- ino_t dm_oldinum; /* inum of the removed dir entry */
- doff_t dm_offset; /* offset of removed dir entry in blk */
- union {
- struct pagedep *dmu_pagedep; /* pagedep dependency for remove */
- ino_t dmu_dirinum; /* parent inode number (for rmdir) */
- } dm_un;
- struct workhead dm_jwork; /* Journal work awaiting completion. */
- };
- #define dm_pagedep dm_un.dmu_pagedep
- #define dm_dirinum dm_un.dmu_dirinum
- /*
- * A "newdirblk" structure tracks the progress of a newly allocated
- * directory block from its creation until it is claimed by its on-disk
- * inode. When a block is allocated to a directory, an fsync of a file
- * whose name is within that block must ensure not only that the block
- * containing the file name has been written, but also that the on-disk
- * inode references that block. When a new directory block is created,
- * we allocate a newdirblk structure which is linked to the associated
- * allocdirect (on its ad_newdirblk list). When the allocdirect has been
- * satisfied, the newdirblk structure is moved to the inodedep id_bufwait
- * list of its directory to await the inode being written. When the inode
- * is written, the directory entries are fully committed and can be
- * deleted from their pagedep->id_pendinghd and inodedep->id_pendinghd
- * lists. Note that we could track directory blocks allocated to indirect
- * blocks using a similar scheme with the allocindir structures. Rather
- * than adding this level of complexity, we simply write those newly
- * allocated indirect blocks synchronously as such allocations are rare.
- * In the case of a new directory the . and .. links are tracked with
- * a mkdir rather than a pagedep. In this case we track the mkdir
- * so it can be released when it is written. A workhead is used
- * to simplify canceling a mkdir that is removed by a subsequent dirrem.
- */
- struct newdirblk {
- struct worklist db_list; /* id_inowait or pg_newdirblk */
- # define db_state db_list.wk_state
- struct pagedep *db_pagedep; /* associated pagedep */
- struct workhead db_mkdir;
- };
- /*
- * The inoref structure holds the elements common to jaddref and jremref
- * so they may easily be queued in-order on the inodedep.
- */
- struct inoref {
- struct worklist if_list; /* Journal pending or jseg entries. */
- # define if_state if_list.wk_state
- TAILQ_ENTRY(inoref) if_deps; /* Links for inodedep. */
- struct jsegdep *if_jsegdep; /* Will track our journal record. */
- off_t if_diroff; /* Directory offset. */
- ino_t if_ino; /* Inode number. */
- ino_t if_parent; /* Parent inode number. */
- nlink_t if_nlink; /* nlink before addition. */
- uint16_t if_mode; /* File mode, needed for IFMT. */
- };
- /*
- * A "jaddref" structure tracks a new reference (link count) on an inode
- * and prevents the link count increase and bitmap allocation until a
- * journal entry can be written. Once the journal entry is written,
- * the inode is put on the pendinghd of the bmsafemap and a diradd or
- * mkdir entry is placed on the bufwait list of the inode. The DEPCOMPLETE
- * flag is used to indicate that all of the required information for writing
- * the journal entry is present. MKDIR_BODY and MKDIR_PARENT are used to
- * differentiate . and .. links from regular file names. NEWBLOCK indicates
- * a bitmap is still pending. If a new reference is canceled by a delete
- * prior to writing the journal the jaddref write is canceled and the
- * structure persists to prevent any disk-visible changes until it is
- * ultimately released when the file is freed or the link is dropped again.
- */
- struct jaddref {
- struct inoref ja_ref; /* see inoref above. */
- # define ja_list ja_ref.if_list /* Jrnl pending, id_inowait, dm_jwork.*/
- # define ja_state ja_ref.if_list.wk_state
- LIST_ENTRY(jaddref) ja_bmdeps; /* Links for bmsafemap. */
- union {
- struct diradd *jau_diradd; /* Pending diradd. */
- struct mkdir *jau_mkdir; /* MKDIR_{PARENT,BODY} */
- } ja_un;
- };
- #define ja_diradd ja_un.jau_diradd
- #define ja_mkdir ja_un.jau_mkdir
- #define ja_diroff ja_ref.if_diroff
- #define ja_ino ja_ref.if_ino
- #define ja_parent ja_ref.if_parent
- #define ja_mode ja_ref.if_mode
- /*
- * A "jremref" structure tracks a removed reference (unlink) on an
- * inode and prevents the directory remove from proceeding until the
- * journal entry is written. Once the journal has been written the remove
- * may proceed as normal.
- */
- struct jremref {
- struct inoref jr_ref; /* see inoref above. */
- # define jr_list jr_ref.if_list /* Linked to softdep_journal_pending. */
- # define jr_state jr_ref.if_list.wk_state
- LIST_ENTRY(jremref) jr_deps; /* Links for dirrem. */
- struct dirrem *jr_dirrem; /* Back pointer to dirrem. */
- };
- /*
- * A "jmvref" structure tracks a name relocations within the same
- * directory block that occur as a result of directory compaction.
- * It prevents the updated directory entry from being written to disk
- * until the journal entry is written. Once the journal has been
- * written the compacted directory may be written to disk.
- */
- struct jmvref {
- struct worklist jm_list; /* Linked to softdep_journal_pending. */
- LIST_ENTRY(jmvref) jm_deps; /* Jmvref on pagedep. */
- struct pagedep *jm_pagedep; /* Back pointer to pagedep. */
- ino_t jm_parent; /* Containing directory inode number. */
- ino_t jm_ino; /* Inode number of our entry. */
- off_t jm_oldoff; /* Our old offset in directory. */
- off_t jm_newoff; /* Our new offset in directory. */
- };
- /*
- * A "jnewblk" structure tracks a newly allocated block or fragment and
- * prevents the direct or indirect block pointer as well as the cg bitmap
- * from being written until it is logged. After it is logged the jsegdep
- * is attached to the allocdirect or allocindir until the operation is
- * completed or reverted. If the operation is reverted prior to the journal
- * write the jnewblk structure is maintained to prevent the bitmaps from
- * reaching the disk. Ultimately the jnewblk structure will be passed
- * to the free routine as the in memory cg is modified back to the free
- * state at which time it can be released. It may be held on any of the
- * fx_jwork, fw_jwork, fb_jwork, ff_jwork, nb_jwork, or ir_jwork lists.
- */
- struct jnewblk {
- struct worklist jn_list; /* See lists above. */
- # define jn_state jn_list.wk_state
- struct jsegdep *jn_jsegdep; /* Will track our journal record. */
- LIST_ENTRY(jnewblk) jn_deps; /* Jnewblks on sm_jnewblkhd. */
- struct worklist *jn_dep; /* Dependency to ref completed seg. */
- ufs_lbn_t jn_lbn; /* Lbn to which allocated. */
- ufs2_daddr_t jn_blkno; /* Blkno allocated */
- ino_t jn_ino; /* Ino to which allocated. */
- int jn_oldfrags; /* Previous fragments when extended. */
- int jn_frags; /* Number of fragments. */
- };
- /*
- * A "jblkdep" structure tracks jfreeblk and jtrunc records attached to a
- * freeblks structure.
- */
- struct jblkdep {
- struct worklist jb_list; /* For softdep journal pending. */
- struct jsegdep *jb_jsegdep; /* Reference to the jseg. */
- struct freeblks *jb_freeblks; /* Back pointer to freeblks. */
- LIST_ENTRY(jblkdep) jb_deps; /* Dep list on freeblks. */
- };
- /*
- * A "jfreeblk" structure tracks the journal write for freeing a block
- * or tree of blocks. The block pointer must not be cleared in the inode
- * or indirect prior to the jfreeblk being written to the journal.
- */
- struct jfreeblk {
- struct jblkdep jf_dep; /* freeblks linkage. */
- ufs_lbn_t jf_lbn; /* Lbn from which blocks freed. */
- ufs2_daddr_t jf_blkno; /* Blkno being freed. */
- ino_t jf_ino; /* Ino from which blocks freed. */
- int jf_frags; /* Number of frags being freed. */
- };
- /*
- * A "jfreefrag" tracks the freeing of a single block when a fragment is
- * extended or an indirect page is replaced. It is not part of a larger
- * freeblks operation.
- */
- struct jfreefrag {
- struct worklist fr_list; /* Linked to softdep_journal_pending. */
- # define fr_state fr_list.wk_state
- struct jsegdep *fr_jsegdep; /* Will track our journal record. */
- struct freefrag *fr_freefrag; /* Back pointer to freefrag. */
- ufs_lbn_t fr_lbn; /* Lbn from which frag freed. */
- ufs2_daddr_t fr_blkno; /* Blkno being freed. */
- ino_t fr_ino; /* Ino from which frag freed. */
- int fr_frags; /* Size of frag being freed. */
- };
- /*
- * A "jtrunc" journals the intent to truncate an inode's data or extent area.
- */
- struct jtrunc {
- struct jblkdep jt_dep; /* freeblks linkage. */
- off_t jt_size; /* Final file size. */
- int jt_extsize; /* Final extent size. */
- ino_t jt_ino; /* Ino being truncated. */
- };
- /*
- * A "jfsync" journals the completion of an fsync which invalidates earlier
- * jtrunc records in the journal.
- */
- struct jfsync {
- struct worklist jfs_list; /* For softdep journal pending. */
- off_t jfs_size; /* Sync file size. */
- int jfs_extsize; /* Sync extent size. */
- ino_t jfs_ino; /* ino being synced. */
- };
- /*
- * A "jsegdep" structure tracks a single reference to a written journal
- * segment so the journal space can be reclaimed when all dependencies
- * have been written. It can hang off of id_inowait, dm_jwork, da_jwork,
- * nb_jwork, ff_jwork, or fb_jwork lists.
- */
- struct jsegdep {
- struct worklist jd_list; /* See above for lists. */
- # define jd_state jd_list.wk_state
- struct jseg *jd_seg; /* Our journal record. */
- };
- /*
- * A "jseg" structure contains all of the journal records written in a
- * single disk write. The jaddref and jremref structures are linked into
- * js_entries so thay may be completed when the write completes. The
- * js_entries also include the write dependency structures: jmvref,
- * jnewblk, jfreeblk, jfreefrag, and jtrunc. The js_refs field counts
- * the number of entries on the js_entries list. Thus there is a single
- * jseg entry to describe each journal write.
- */
- struct jseg {
- struct worklist js_list; /* b_deps link for journal */
- # define js_state js_list.wk_state
- struct workhead js_entries; /* Entries awaiting write */
- LIST_HEAD(, freework) js_indirs;/* List of indirects in this seg. */
- TAILQ_ENTRY(jseg) js_next; /* List of all unfinished segments. */
- struct jblocks *js_jblocks; /* Back pointer to block/seg list */
- struct buf *js_buf; /* Buffer while unwritten */
- uint64_t js_seq; /* Journal record sequence number. */
- uint64_t js_oldseq; /* Oldest valid sequence number. */
- int js_size; /* Size of journal record in bytes. */
- int js_cnt; /* Total items allocated. */
- int js_refs; /* Count of js_entries items. */
- };
- /*
- * A 'sbdep' structure tracks the head of the free inode list and
- * superblock writes. This makes sure the superblock is always pointing at
- * the first possible unlinked inode for the suj recovery process. If a
- * block write completes and we discover a new head is available the buf
- * is dirtied and the dep is kept. See the description of the UNLINK*
- * flags above for more details.
- */
- struct sbdep {
- struct worklist sb_list; /* b_dep linkage */
- struct fs *sb_fs; /* Filesystem pointer within buf. */
- struct ufsmount *sb_ump; /* Our mount structure */
- };
- /*
- * Private journaling structures.
- */
- struct jblocks {
- struct jseglst jb_segs; /* TAILQ of current segments. */
- struct jseg *jb_writeseg; /* Next write to complete. */
- struct jseg *jb_oldestseg; /* Oldest segment with valid entries. */
- struct jextent *jb_extent; /* Extent array. */
- uint64_t jb_nextseq; /* Next sequence number. */
- uint64_t jb_oldestwrseq; /* Oldest written sequence number. */
- uint8_t jb_needseg; /* Need a forced segment. */
- uint8_t jb_suspended; /* Did journal suspend writes? */
- int jb_avail; /* Available extents. */
- int jb_used; /* Last used extent. */
- int jb_head; /* Allocator head. */
- int jb_off; /* Allocator extent offset. */
- int jb_blocks; /* Total disk blocks covered. */
- int jb_free; /* Total disk blocks free. */
- int jb_min; /* Minimum free space. */
- int jb_low; /* Low on space. */
- int jb_age; /* Insertion time of oldest rec. */
- };
- struct jextent {
- ufs2_daddr_t je_daddr; /* Disk block address. */
- int je_blocks; /* Disk block count. */
- };
- /*
- * Hash table declarations.
- */
- LIST_HEAD(mkdirlist, mkdir);
- LIST_HEAD(pagedep_hashhead, pagedep);
- LIST_HEAD(inodedep_hashhead, inodedep);
- LIST_HEAD(newblk_hashhead, newblk);
- LIST_HEAD(bmsafemap_hashhead, bmsafemap);
- TAILQ_HEAD(indir_hashhead, freework);
- #if 0
- /*
- * Per-filesystem soft dependency data.
- * Allocated at mount and freed at unmount.
- */
- struct mount_softdeps {
- /* HARVEY TODO This lock is used in interrupt */
- struct rwlock sd_fslock; /* softdep lock */
- struct workhead sd_workitem_pending; /* softdep work queue */
- struct worklist *sd_worklist_tail; /* Tail pointer for above */
- struct workhead sd_journal_pending; /* journal work queue */
- struct worklist *sd_journal_tail; /* Tail pointer for above */
- struct jblocks *sd_jblocks; /* Journal block information */
- struct inodedeplst sd_unlinked; /* Unlinked inodes */
- struct bmsafemaphd sd_dirtycg; /* Dirty CGs */
- struct mkdirlist sd_mkdirlisthd; /* Track mkdirs */
- struct pagedep_hashhead *sd_pdhash; /* pagedep hash table */
- uint64_t sd_pdhashsize; /* pagedep hash table size-1 */
- long sd_pdnextclean; /* next hash bucket to clean */
- struct inodedep_hashhead *sd_idhash; /* inodedep hash table */
- uint64_t sd_idhashsize; /* inodedep hash table size-1 */
- long sd_idnextclean; /* next hash bucket to clean */
- struct newblk_hashhead *sd_newblkhash; /* newblk hash table */
- uint64_t sd_newblkhashsize; /* newblk hash table size-1 */
- struct bmsafemap_hashhead *sd_bmhash; /* bmsafemap hash table */
- uint64_t sd_bmhashsize; /* bmsafemap hash table size-1*/
- struct indir_hashhead *sd_indirhash; /* indir hash table */
- uint64_t sd_indirhashsize; /* indir hash table size-1 */
- int sd_on_journal; /* Items on the journal list */
- int sd_on_worklist; /* Items on the worklist */
- int sd_deps; /* Total dependency count */
- int sd_accdeps; /* accumulated dep count */
- int sd_req; /* Wakeup when deps hits 0. */
- int sd_flags; /* comm with flushing thread */
- int sd_cleanups; /* Calls to cleanup */
- struct thread *sd_flushtd; /* thread handling flushing */
- TAILQ_ENTRY(mount_softdeps) sd_next; /* List of softdep filesystem */
- struct ufsmount *sd_ump; /* our ufsmount structure */
- uint64_t sd_curdeps[D_LAST + 1]; /* count of current deps */
- };
- #endif // 0
- /*
- * Flags for communicating with the syncer thread.
- */
- #define FLUSH_EXIT 0x0001 /* time to exit */
- #define FLUSH_CLEANUP 0x0002 /* need to clear out softdep structures */
- #define FLUSH_STARTING 0x0004 /* flush thread not yet started */
- /*
- * Keep the old names from when these were in the ufsmount structure.
- */
- #define softdep_workitem_pending um_softdep->sd_workitem_pending
- #define softdep_worklist_tail um_softdep->sd_worklist_tail
- #define softdep_journal_pending um_softdep->sd_journal_pending
- #define softdep_journal_tail um_softdep->sd_journal_tail
- #define softdep_jblocks um_softdep->sd_jblocks
- #define softdep_unlinked um_softdep->sd_unlinked
- #define softdep_dirtycg um_softdep->sd_dirtycg
- #define softdep_mkdirlisthd um_softdep->sd_mkdirlisthd
- #define pagedep_hashtbl um_softdep->sd_pdhash
- #define pagedep_hash_size um_softdep->sd_pdhashsize
- #define pagedep_nextclean um_softdep->sd_pdnextclean
- #define inodedep_hashtbl um_softdep->sd_idhash
- #define inodedep_hash_size um_softdep->sd_idhashsize
- #define inodedep_nextclean um_softdep->sd_idnextclean
- #define newblk_hashtbl um_softdep->sd_newblkhash
- #define newblk_hash_size um_softdep->sd_newblkhashsize
- #define bmsafemap_hashtbl um_softdep->sd_bmhash
- #define bmsafemap_hash_size um_softdep->sd_bmhashsize
- #define indir_hashtbl um_softdep->sd_indirhash
- #define indir_hash_size um_softdep->sd_indirhashsize
- #define softdep_on_journal um_softdep->sd_on_journal
- #define softdep_on_worklist um_softdep->sd_on_worklist
- #define softdep_deps um_softdep->sd_deps
- #define softdep_accdeps um_softdep->sd_accdeps
- #define softdep_req um_softdep->sd_req
- #define softdep_flags um_softdep->sd_flags
- #define softdep_flushtd um_softdep->sd_flushtd
- #define softdep_curdeps um_softdep->sd_curdeps
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