X-Git-Url: https://gitweb.dragonflybsd.org/dragonfly.git/blobdiff_plain/797e4fe9db5073f094b467a984a94a3086899e65..HEAD:/sys/kern/vfs_journal.c diff --git a/sys/kern/vfs_journal.c b/sys/kern/vfs_journal.c index 8f70995479..1381af561f 100644 --- a/sys/kern/vfs_journal.c +++ b/sys/kern/vfs_journal.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2004 The DragonFly Project. All rights reserved. + * Copyright (c) 2004-2006 The DragonFly Project. All rights reserved. * * This code is derived from software contributed to The DragonFly Project * by Matthew Dillon @@ -30,21 +30,8 @@ * 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. - * - * $DragonFly: src/sys/kern/vfs_journal.c,v 1.26 2006/05/07 00:24:56 dillon Exp $ */ /* - * Each mount point may have zero or more independantly configured journals - * attached to it. Each journal is represented by a memory FIFO and worker - * thread. Journal events are streamed through the FIFO to the thread, - * batched up (typically on one-second intervals), and written out by the - * thread. - * - * Journal vnode ops are executed instead of mnt_vn_norm_ops when one or - * more journals have been installed on a mount point. It becomes the - * responsibility of the journal op to call the underlying normal op as - * appropriate. - * * The journaling protocol is intended to evolve into a two-way stream * whereby transaction IDs can be acknowledged by the journaling target * when the data has been committed to hard storage. Both implicit and @@ -87,7 +74,7 @@ #include #include #include -#include +#include #include #include @@ -100,489 +87,52 @@ #include #include -#include - -static int journal_attach(struct mount *mp); -static void journal_detach(struct mount *mp); -static int journal_install_vfs_journal(struct mount *mp, struct file *fp, - const struct mountctl_install_journal *info); -static int journal_restart_vfs_journal(struct mount *mp, struct file *fp, - const struct mountctl_restart_journal *info); -static int journal_remove_vfs_journal(struct mount *mp, - const struct mountctl_remove_journal *info); -static int journal_restart(struct mount *mp, struct file *fp, - struct journal *jo, int flags); -static int journal_destroy(struct mount *mp, struct journal *jo, int flags); -static int journal_resync_vfs_journal(struct mount *mp, const void *ctl); -static int journal_status_vfs_journal(struct mount *mp, - const struct mountctl_status_journal *info, - struct mountctl_journal_ret_status *rstat, - int buflen, int *res); -static void journal_create_threads(struct journal *jo); -static void journal_destroy_threads(struct journal *jo, int flags); +#include +#include + static void journal_wthread(void *info); static void journal_rthread(void *info); -static void *journal_reserve(struct journal *jo, - struct journal_rawrecbeg **rawpp, - int16_t streamid, int bytes); +static void *journal_reserve(struct journal *jo, + struct journal_rawrecbeg **rawpp, + int16_t streamid, int bytes); static void *journal_extend(struct journal *jo, - struct journal_rawrecbeg **rawpp, - int truncbytes, int bytes, int *newstreamrecp); -static void journal_abort(struct journal *jo, - struct journal_rawrecbeg **rawpp); -static void journal_commit(struct journal *jo, - struct journal_rawrecbeg **rawpp, - int bytes, int closeout); - -static void jrecord_init(struct journal *jo, - struct jrecord *jrec, int16_t streamid); -static struct journal_subrecord *jrecord_push( - struct jrecord *jrec, int16_t rectype); -static void jrecord_pop(struct jrecord *jrec, struct journal_subrecord *parent); -static struct journal_subrecord *jrecord_write(struct jrecord *jrec, - int16_t rectype, int bytes); -static void jrecord_data(struct jrecord *jrec, const void *buf, int bytes); -static void jrecord_done(struct jrecord *jrec, int abortit); -static void jrecord_undo_file(struct jrecord *jrec, struct vnode *vp, - int jrflags, off_t off, off_t bytes); - -static int journal_setattr(struct vop_setattr_args *ap); -static int journal_write(struct vop_write_args *ap); -static int journal_fsync(struct vop_fsync_args *ap); -static int journal_putpages(struct vop_putpages_args *ap); -static int journal_setacl(struct vop_setacl_args *ap); -static int journal_setextattr(struct vop_setextattr_args *ap); -static int journal_ncreate(struct vop_ncreate_args *ap); -static int journal_nmknod(struct vop_nmknod_args *ap); -static int journal_nlink(struct vop_nlink_args *ap); -static int journal_nsymlink(struct vop_nsymlink_args *ap); -static int journal_nwhiteout(struct vop_nwhiteout_args *ap); -static int journal_nremove(struct vop_nremove_args *ap); -static int journal_nmkdir(struct vop_nmkdir_args *ap); -static int journal_nrmdir(struct vop_nrmdir_args *ap); -static int journal_nrename(struct vop_nrename_args *ap); - -#define JRUNDO_SIZE 0x00000001 -#define JRUNDO_UID 0x00000002 -#define JRUNDO_GID 0x00000004 -#define JRUNDO_FSID 0x00000008 -#define JRUNDO_MODES 0x00000010 -#define JRUNDO_INUM 0x00000020 -#define JRUNDO_ATIME 0x00000040 -#define JRUNDO_MTIME 0x00000080 -#define JRUNDO_CTIME 0x00000100 -#define JRUNDO_GEN 0x00000200 -#define JRUNDO_FLAGS 0x00000400 -#define JRUNDO_UDEV 0x00000800 -#define JRUNDO_NLINK 0x00001000 -#define JRUNDO_FILEDATA 0x00010000 -#define JRUNDO_GETVP 0x00020000 -#define JRUNDO_CONDLINK 0x00040000 /* write file data if link count 1 */ -#define JRUNDO_VATTR (JRUNDO_SIZE|JRUNDO_UID|JRUNDO_GID|JRUNDO_FSID|\ - JRUNDO_MODES|JRUNDO_INUM|JRUNDO_ATIME|JRUNDO_MTIME|\ - JRUNDO_CTIME|JRUNDO_GEN|JRUNDO_FLAGS|JRUNDO_UDEV|\ - JRUNDO_NLINK) -#define JRUNDO_ALL (JRUNDO_VATTR|JRUNDO_FILEDATA) - -static struct vnodeopv_entry_desc journal_vnodeop_entries[] = { - { &vop_default_desc, vop_journal_operate_ap }, - { &vop_mountctl_desc, (void *)journal_mountctl }, - { &vop_setattr_desc, (void *)journal_setattr }, - { &vop_write_desc, (void *)journal_write }, - { &vop_fsync_desc, (void *)journal_fsync }, - { &vop_putpages_desc, (void *)journal_putpages }, - { &vop_setacl_desc, (void *)journal_setacl }, - { &vop_setextattr_desc, (void *)journal_setextattr }, - { &vop_ncreate_desc, (void *)journal_ncreate }, - { &vop_nmknod_desc, (void *)journal_nmknod }, - { &vop_nlink_desc, (void *)journal_nlink }, - { &vop_nsymlink_desc, (void *)journal_nsymlink }, - { &vop_nwhiteout_desc, (void *)journal_nwhiteout }, - { &vop_nremove_desc, (void *)journal_nremove }, - { &vop_nmkdir_desc, (void *)journal_nmkdir }, - { &vop_nrmdir_desc, (void *)journal_nrmdir }, - { &vop_nrename_desc, (void *)journal_nrename }, - { NULL, NULL } -}; - -static MALLOC_DEFINE(M_JOURNAL, "journal", "Journaling structures"); -static MALLOC_DEFINE(M_JFIFO, "journal-fifo", "Journal FIFO"); - -int -journal_mountctl(struct vop_mountctl_args *ap) -{ - struct mount *mp; - int error = 0; - - mp = ap->a_head.a_ops->vv_mount; - KKASSERT(mp); - - if (mp->mnt_vn_journal_ops == NULL) { - switch(ap->a_op) { - case MOUNTCTL_INSTALL_VFS_JOURNAL: - error = journal_attach(mp); - if (error == 0 && ap->a_ctllen != sizeof(struct mountctl_install_journal)) - error = EINVAL; - if (error == 0 && ap->a_fp == NULL) - error = EBADF; - if (error == 0) - error = journal_install_vfs_journal(mp, ap->a_fp, ap->a_ctl); - if (TAILQ_EMPTY(&mp->mnt_jlist)) - journal_detach(mp); - break; - case MOUNTCTL_RESTART_VFS_JOURNAL: - case MOUNTCTL_REMOVE_VFS_JOURNAL: - case MOUNTCTL_RESYNC_VFS_JOURNAL: - case MOUNTCTL_STATUS_VFS_JOURNAL: - error = ENOENT; - break; - default: - error = EOPNOTSUPP; - break; - } - } else { - switch(ap->a_op) { - case MOUNTCTL_INSTALL_VFS_JOURNAL: - if (ap->a_ctllen != sizeof(struct mountctl_install_journal)) - error = EINVAL; - if (error == 0 && ap->a_fp == NULL) - error = EBADF; - if (error == 0) - error = journal_install_vfs_journal(mp, ap->a_fp, ap->a_ctl); - break; - case MOUNTCTL_RESTART_VFS_JOURNAL: - if (ap->a_ctllen != sizeof(struct mountctl_restart_journal)) - error = EINVAL; - if (error == 0 && ap->a_fp == NULL) - error = EBADF; - if (error == 0) - error = journal_restart_vfs_journal(mp, ap->a_fp, ap->a_ctl); - break; - case MOUNTCTL_REMOVE_VFS_JOURNAL: - if (ap->a_ctllen != sizeof(struct mountctl_remove_journal)) - error = EINVAL; - if (error == 0) - error = journal_remove_vfs_journal(mp, ap->a_ctl); - if (TAILQ_EMPTY(&mp->mnt_jlist)) - journal_detach(mp); - break; - case MOUNTCTL_RESYNC_VFS_JOURNAL: - if (ap->a_ctllen != 0) - error = EINVAL; - error = journal_resync_vfs_journal(mp, ap->a_ctl); - break; - case MOUNTCTL_STATUS_VFS_JOURNAL: - if (ap->a_ctllen != sizeof(struct mountctl_status_journal)) - error = EINVAL; - if (error == 0) { - error = journal_status_vfs_journal(mp, ap->a_ctl, - ap->a_buf, ap->a_buflen, ap->a_res); - } - break; - default: - error = EOPNOTSUPP; - break; - } - } - return (error); -} - -/* - * High level mount point setup. When a - */ -static int -journal_attach(struct mount *mp) -{ - KKASSERT(mp->mnt_jbitmap == NULL); - vfs_add_vnodeops(mp, &mp->mnt_vn_journal_ops, - journal_vnodeop_entries, 0); - mp->mnt_jbitmap = malloc(JREC_STREAMID_JMAX/8, M_JOURNAL, M_WAITOK|M_ZERO); - mp->mnt_streamid = JREC_STREAMID_JMIN; - return(0); -} - -static void -journal_detach(struct mount *mp) -{ - KKASSERT(mp->mnt_jbitmap != NULL); - if (mp->mnt_vn_journal_ops) - vfs_rm_vnodeops(&mp->mnt_vn_journal_ops); - free(mp->mnt_jbitmap, M_JOURNAL); - mp->mnt_jbitmap = NULL; -} - -/* - * Install a journal on a mount point. Each journal has an associated worker - * thread which is responsible for buffering and spooling the data to the - * target. A mount point may have multiple journals attached to it. An - * initial start record is generated when the journal is associated. - */ -static int -journal_install_vfs_journal(struct mount *mp, struct file *fp, - const struct mountctl_install_journal *info) -{ - struct journal *jo; - struct jrecord jrec; - int error = 0; - int size; - - jo = malloc(sizeof(struct journal), M_JOURNAL, M_WAITOK|M_ZERO); - bcopy(info->id, jo->id, sizeof(jo->id)); - jo->flags = info->flags & ~(MC_JOURNAL_WACTIVE | MC_JOURNAL_RACTIVE | - MC_JOURNAL_STOP_REQ); - - /* - * Memory FIFO size, round to nearest power of 2 - */ - if (info->membufsize) { - if (info->membufsize < 65536) - size = 65536; - else if (info->membufsize > 128 * 1024 * 1024) - size = 128 * 1024 * 1024; - else - size = (int)info->membufsize; - } else { - size = 1024 * 1024; - } - jo->fifo.size = 1; - while (jo->fifo.size < size) - jo->fifo.size <<= 1; - - /* - * Other parameters. If not specified the starting transaction id - * will be the current date. - */ - if (info->transid) { - jo->transid = info->transid; - } else { - struct timespec ts; - getnanotime(&ts); - jo->transid = ((int64_t)ts.tv_sec << 30) | ts.tv_nsec; - } - - jo->fp = fp; - - /* - * Allocate the memory FIFO - */ - jo->fifo.mask = jo->fifo.size - 1; - jo->fifo.membase = malloc(jo->fifo.size, M_JFIFO, M_WAITOK|M_ZERO|M_NULLOK); - if (jo->fifo.membase == NULL) - error = ENOMEM; - - /* - * Create the worker threads and generate the association record. - */ - if (error) { - free(jo, M_JOURNAL); - } else { - fhold(fp); - journal_create_threads(jo); - jrecord_init(jo, &jrec, JREC_STREAMID_DISCONT); - jrecord_write(&jrec, JTYPE_ASSOCIATE, 0); - jrecord_done(&jrec, 0); - TAILQ_INSERT_TAIL(&mp->mnt_jlist, jo, jentry); - } - return(error); -} - -/* - * Restart a journal with a new descriptor. The existing reader and writer - * threads are terminated and a new descriptor is associated with the - * journal. The FIFO rindex is reset to xindex and the threads are then - * restarted. - */ -static int -journal_restart_vfs_journal(struct mount *mp, struct file *fp, - const struct mountctl_restart_journal *info) -{ - struct journal *jo; - int error; + struct journal_rawrecbeg **rawpp, + int truncbytes, int bytes, int *newstreamrecp); +static void journal_abort(struct journal *jo, + struct journal_rawrecbeg **rawpp); +static void journal_commit(struct journal *jo, + struct journal_rawrecbeg **rawpp, + int bytes, int closeout); +static void jrecord_data(struct jrecord *jrec, + void *buf, int bytes, int dtype); - TAILQ_FOREACH(jo, &mp->mnt_jlist, jentry) { - if (bcmp(jo->id, info->id, sizeof(jo->id)) == 0) - break; - } - if (jo) - error = journal_restart(mp, fp, jo, info->flags); - else - error = EINVAL; - return (error); -} - -static int -journal_restart(struct mount *mp, struct file *fp, - struct journal *jo, int flags) -{ - /* - * XXX lock the jo - */ - -#if 0 - /* - * Record the fact that we are doing a restart in the journal. - * XXX it isn't safe to do this if the journal is being restarted - * because it was locked up and the writer thread has already exited. - */ - jrecord_init(jo, &jrec, JREC_STREAMID_RESTART); - jrecord_write(&jrec, JTYPE_DISASSOCIATE, 0); - jrecord_done(&jrec, 0); -#endif - - /* - * Stop the reader and writer threads and clean up the current - * descriptor. - */ - printf("RESTART WITH FP %p KILLING %p\n", fp, jo->fp); - journal_destroy_threads(jo, flags); - if (jo->fp) - fdrop(jo->fp); - - /* - * Associate the new descriptor, reset the FIFO index, and recreate - * the threads. - */ - fhold(fp); - jo->fp = fp; - jo->fifo.rindex = jo->fifo.xindex; - journal_create_threads(jo); - - return(0); -} - -/* - * Disassociate a journal from a mount point and terminate its worker thread. - * A final termination record is written out before the file pointer is - * dropped. - */ -static int -journal_remove_vfs_journal(struct mount *mp, - const struct mountctl_remove_journal *info) -{ - struct journal *jo; - int error; - - TAILQ_FOREACH(jo, &mp->mnt_jlist, jentry) { - if (bcmp(jo->id, info->id, sizeof(jo->id)) == 0) - break; - } - if (jo) - error = journal_destroy(mp, jo, info->flags); - else - error = EINVAL; - return (error); -} +MALLOC_DEFINE(M_JOURNAL, "journal", "Journaling structures"); +MALLOC_DEFINE(M_JFIFO, "journal-fifo", "Journal FIFO"); -/* - * Remove all journals associated with a mount point. Usually called - * by the umount code. - */ void -journal_remove_all_journals(struct mount *mp, int flags) -{ - struct journal *jo; - - while ((jo = TAILQ_FIRST(&mp->mnt_jlist)) != NULL) { - journal_destroy(mp, jo, flags); - } -} - -static int -journal_destroy(struct mount *mp, struct journal *jo, int flags) -{ - struct jrecord jrec; - - TAILQ_REMOVE(&mp->mnt_jlist, jo, jentry); - - jrecord_init(jo, &jrec, JREC_STREAMID_DISCONT); - jrecord_write(&jrec, JTYPE_DISASSOCIATE, 0); - jrecord_done(&jrec, 0); - - journal_destroy_threads(jo, flags); - - if (jo->fp) - fdrop(jo->fp); - if (jo->fifo.membase) - free(jo->fifo.membase, M_JFIFO); - free(jo, M_JOURNAL); - - return(0); -} - -static int -journal_resync_vfs_journal(struct mount *mp, const void *ctl) -{ - return(EINVAL); -} - -static int -journal_status_vfs_journal(struct mount *mp, - const struct mountctl_status_journal *info, - struct mountctl_journal_ret_status *rstat, - int buflen, int *res) -{ - struct journal *jo; - int error = 0; - int index; - - index = 0; - *res = 0; - TAILQ_FOREACH(jo, &mp->mnt_jlist, jentry) { - if (info->index == MC_JOURNAL_INDEX_ID) { - if (bcmp(jo->id, info->id, sizeof(jo->id)) != 0) - continue; - } else if (info->index >= 0) { - if (info->index < index) - continue; - } else if (info->index != MC_JOURNAL_INDEX_ALL) { - continue; - } - if (buflen < sizeof(*rstat)) { - if (*res) - rstat[-1].flags |= MC_JOURNAL_STATUS_MORETOCOME; - else - error = EINVAL; - break; - } - bzero(rstat, sizeof(*rstat)); - rstat->recsize = sizeof(*rstat); - bcopy(jo->id, rstat->id, sizeof(jo->id)); - rstat->index = index; - rstat->membufsize = jo->fifo.size; - rstat->membufused = jo->fifo.windex - jo->fifo.xindex; - rstat->membufunacked = jo->fifo.rindex - jo->fifo.xindex; - rstat->bytessent = jo->total_acked; - rstat->fifostalls = jo->fifostalls; - ++rstat; - ++index; - *res += sizeof(*rstat); - buflen -= sizeof(*rstat); - } - return(error); -} - -static void journal_create_threads(struct journal *jo) { jo->flags &= ~(MC_JOURNAL_STOP_REQ | MC_JOURNAL_STOP_IMM); jo->flags |= MC_JOURNAL_WACTIVE; lwkt_create(journal_wthread, jo, NULL, &jo->wthread, - TDF_STOPREQ, -1, "journal w:%.*s", JIDMAX, jo->id); + TDF_NOSTART, -1, + "journal w:%.*s", JIDMAX, jo->id); lwkt_setpri(&jo->wthread, TDPRI_KERN_DAEMON); lwkt_schedule(&jo->wthread); if (jo->flags & MC_JOURNAL_WANT_FULLDUPLEX) { jo->flags |= MC_JOURNAL_RACTIVE; lwkt_create(journal_rthread, jo, NULL, &jo->rthread, - TDF_STOPREQ, -1, "journal r:%.*s", JIDMAX, jo->id); + TDF_NOSTART, -1, + "journal r:%.*s", JIDMAX, jo->id); lwkt_setpri(&jo->rthread, TDPRI_KERN_DAEMON); lwkt_schedule(&jo->rthread); } } -static void +void journal_destroy_threads(struct journal *jo, int flags) { int wcount; @@ -593,7 +143,7 @@ journal_destroy_threads(struct journal *jo, int flags) while (jo->flags & (MC_JOURNAL_WACTIVE | MC_JOURNAL_RACTIVE)) { tsleep(jo, 0, "jwait", hz); if (++wcount % 10 == 0) { - printf("Warning: journal %s waiting for descriptors to close\n", + kprintf("Warning: journal %s waiting for descriptors to close\n", jo->id); } } @@ -617,10 +167,13 @@ journal_wthread(void *info) { struct journal *jo = info; struct journal_rawrecbeg *rawp; - int bytes; int error; - int avail; - int res; + size_t avail; + size_t bytes; + size_t res; + + /* not MPSAFE yet */ + get_mplock(); for (;;) { /* @@ -707,10 +260,11 @@ journal_wthread(void *info) bytes = res; jo->fifo.rindex += bytes; error = fp_write(jo->fp, - jo->fifo.membase + ((jo->fifo.rindex - bytes) & jo->fifo.mask), - bytes, &res); + jo->fifo.membase + + ((jo->fifo.rindex - bytes) & jo->fifo.mask), + bytes, &res, UIO_SYSSPACE); if (error) { - printf("journal_thread(%s) write, error %d\n", jo->id, error); + kprintf("journal_thread(%s) write, error %d\n", jo->id, error); /* XXX */ } else { KKASSERT(res == bytes); @@ -737,6 +291,7 @@ journal_wthread(void *info) jo->flags &= ~MC_JOURNAL_WACTIVE; wakeup(jo); wakeup(&jo->fifo.windex); + rel_mplock(); } /* @@ -751,12 +306,15 @@ journal_rthread(void *info) struct journal *jo = info; int64_t transid; int error; - int count; - int bytes; + size_t count; + size_t bytes; transid = 0; error = 0; + /* not MPSAFE yet */ + get_mplock(); + for (;;) { /* * We have been asked to stop @@ -769,20 +327,21 @@ journal_rthread(void *info) * stream. */ if (transid == 0) { - error = fp_read(jo->fp, &ack, sizeof(ack), &count, 1); + error = fp_read(jo->fp, &ack, sizeof(ack), &count, + 1, UIO_SYSSPACE); #if 0 - printf("fp_read ack error %d count %d\n", error, count); + kprintf("fp_read ack error %d count %d\n", error, count); #endif if (error || count != sizeof(ack)) break; if (error) { - printf("read error %d on receive stream\n", error); + kprintf("read error %d on receive stream\n", error); break; } if (ack.rbeg.begmagic != JREC_BEGMAGIC || ack.rend.endmagic != JREC_ENDMAGIC ) { - printf("bad begmagic or endmagic on receive stream\n"); + kprintf("bad begmagic or endmagic on receive stream\n"); break; } transid = ack.rbeg.transid; @@ -797,7 +356,8 @@ journal_rthread(void *info) bytes = jo->fifo.rindex - jo->fifo.xindex; if (bytes == 0) { - printf("warning: unsent data acknowledged transid %08llx\n", transid); + kprintf("warning: unsent data acknowledged transid %08llx\n", + (long long)transid); tsleep(&jo->fifo.xindex, 0, "jrseq", hz); transid = 0; continue; @@ -816,7 +376,9 @@ journal_rthread(void *info) */ if (rawp->transid < transid) { #if 1 - printf("ackskip %08llx/%08llx\n", rawp->transid, transid); + kprintf("ackskip %08llx/%08llx\n", + (long long)rawp->transid, + (long long)transid); #endif jo->fifo.xindex += (rawp->recsize + 15) & ~15; jo->total_acked += (rawp->recsize + 15) & ~15; @@ -828,7 +390,9 @@ journal_rthread(void *info) } if (rawp->transid == transid) { #if 1 - printf("ackskip %08llx/%08llx\n", rawp->transid, transid); + kprintf("ackskip %08llx/%08llx\n", + (long long)rawp->transid, + (long long)transid); #endif jo->fifo.xindex += (rawp->recsize + 15) & ~15; jo->total_acked += (rawp->recsize + 15) & ~15; @@ -839,12 +403,14 @@ journal_rthread(void *info) transid = 0; continue; } - printf("warning: unsent data(2) acknowledged transid %08llx\n", transid); + kprintf("warning: unsent data(2) acknowledged transid %08llx\n", + (long long)transid); transid = 0; } jo->flags &= ~MC_JOURNAL_RACTIVE; wakeup(jo); wakeup(&jo->fifo.windex); + rel_mplock(); } /* @@ -1213,145 +779,6 @@ journal_commit(struct journal *jo, struct journal_rawrecbeg **rawpp, journal_commit_wakeup(jo); } -/************************************************************************ - * PARALLEL TRANSACTION SUPPORT ROUTINES * - ************************************************************************ - * - * JRECLIST_*() - routines which create and iterate over jrecord structures, - * because a mount point may have multiple attached journals. - */ - -/* - * Initialize the passed jrecord_list and create a jrecord for each - * journal we need to write to. Unnecessary mallocs are avoided by - * using the passed jrecord structure as the first jrecord in the list. - * A starting transaction is pushed for each jrecord. - * - * Returns non-zero if any of the journals require undo records. - */ -static -int -jreclist_init(struct mount *mp, struct jrecord_list *jreclist, - struct jrecord *jreccache, int16_t rectype) -{ - struct journal *jo; - struct jrecord *jrec; - int wantrev; - int count; - int16_t streamid; - - TAILQ_INIT(&jreclist->list); - - /* - * Select the stream ID to use for the transaction. We must select - * a stream ID that is not currently in use by some other parallel - * transaction. - * - * Don't bother calculating the next streamid when reassigning - * mnt_streamid, since parallel transactions are fairly rare. This - * also allows someone observing the raw records to clearly see - * when parallel transactions occur. - */ - streamid = mp->mnt_streamid; - count = 0; - while (mp->mnt_jbitmap[streamid >> 3] & (1 << (streamid & 7))) { - if (++streamid == JREC_STREAMID_JMAX) - streamid = JREC_STREAMID_JMIN; - if (++count == JREC_STREAMID_JMAX - JREC_STREAMID_JMIN) { - printf("jreclist_init: all streamid's in use! sleeping\n"); - tsleep(jreclist, 0, "jsidfl", hz * 10); - count = 0; - } - } - mp->mnt_jbitmap[streamid >> 3] |= 1 << (streamid & 7); - mp->mnt_streamid = streamid; - jreclist->streamid = streamid; - - /* - * Now initialize a stream on each journal. - */ - count = 0; - wantrev = 0; - TAILQ_FOREACH(jo, &mp->mnt_jlist, jentry) { - if (count == 0) - jrec = jreccache; - else - jrec = malloc(sizeof(*jrec), M_JOURNAL, M_WAITOK); - jrecord_init(jo, jrec, streamid); - jrec->user_save = jrecord_push(jrec, rectype); - TAILQ_INSERT_TAIL(&jreclist->list, jrec, user_entry); - if (jo->flags & MC_JOURNAL_WANT_REVERSABLE) - wantrev = 1; - ++count; - } - return(wantrev); -} - -/* - * Terminate the journaled transactions started by jreclist_init(). If - * an error occured, the transaction records will be aborted. - */ -static -void -jreclist_done(struct mount *mp, struct jrecord_list *jreclist, int error) -{ - struct jrecord *jrec; - int count; - - /* - * Cleanup the jrecord state on each journal. - */ - TAILQ_FOREACH(jrec, &jreclist->list, user_entry) { - jrecord_pop(jrec, jrec->user_save); - jrecord_done(jrec, error); - } - - /* - * Free allocated jrec's (the first is always supplied) - */ - count = 0; - while ((jrec = TAILQ_FIRST(&jreclist->list)) != NULL) { - TAILQ_REMOVE(&jreclist->list, jrec, user_entry); - if (count) - free(jrec, M_JOURNAL); - ++count; - } - - /* - * Clear the streamid so it can be reused. - */ - mp->mnt_jbitmap[jreclist->streamid >> 3] &= ~(1 << (jreclist->streamid & 7)); -} - -/* - * This procedure writes out UNDO records for available reversable - * journals. - * - * XXX could use improvement. There is no need to re-read the file - * for each journal. - */ -static -void -jreclist_undo_file(struct jrecord_list *jreclist, struct vnode *vp, - int jrflags, off_t off, off_t bytes) -{ - struct jrecord *jrec; - int error; - - error = 0; - if (jrflags & JRUNDO_GETVP) - error = vget(vp, LK_SHARED); - if (error == 0) { - TAILQ_FOREACH(jrec, &jreclist->list, user_entry) { - if (jrec->jo->flags & MC_JOURNAL_WANT_REVERSABLE) { - jrecord_undo_file(jrec, vp, jrflags, off, bytes); - } - } - } - if (error == 0 && jrflags & JRUNDO_GETVP) - vput(vp); -} - /************************************************************************ * TRANSACTION SUPPORT ROUTINES * ************************************************************************ @@ -1364,7 +791,7 @@ jreclist_undo_file(struct jrecord_list *jreclist, struct vnode *vp, * Initialize the passed jrecord structure and start a new stream transaction * by reserving an initial build space in the journal's memory FIFO. */ -static void +void jrecord_init(struct journal *jo, struct jrecord *jrec, int16_t streamid) { bzero(jrec, sizeof(*jrec)); @@ -1384,7 +811,6 @@ jrecord_init(struct journal *jo, struct jrecord *jrec, int16_t streamid) * record, so the caller should not mess with the returned pointer in * any way other then to save it. */ -static struct journal_subrecord * jrecord_push(struct jrecord *jrec, int16_t rectype) { @@ -1414,7 +840,7 @@ jrecord_push(struct jrecord *jrec, int16_t rectype) * and if not valid may or may not be NULL, depending on the value * of pushptrgood. */ -static void +void jrecord_pop(struct jrecord *jrec, struct journal_subrecord *save) { struct journal_subrecord *last; @@ -1519,12 +945,41 @@ jrecord_pop(struct jrecord *jrec, struct journal_subrecord *save) /* * Write out a leaf record, including associated data. */ -static void jrecord_leaf(struct jrecord *jrec, int16_t rectype, void *ptr, int bytes) { jrecord_write(jrec, rectype, bytes); - jrecord_data(jrec, ptr, bytes); + jrecord_data(jrec, ptr, bytes, JDATA_KERN); +} + +void +jrecord_leaf_uio(struct jrecord *jrec, int16_t rectype, + struct uio *uio) +{ + struct iovec *iov; + int i; + + for (i = 0; i < uio->uio_iovcnt; ++i) { + iov = &uio->uio_iov[i]; + if (iov->iov_len == 0) + continue; + if (uio->uio_segflg == UIO_SYSSPACE) { + jrecord_write(jrec, rectype, iov->iov_len); + jrecord_data(jrec, iov->iov_base, iov->iov_len, JDATA_KERN); + } else { /* UIO_USERSPACE */ + jrecord_write(jrec, rectype, iov->iov_len); + jrecord_data(jrec, iov->iov_base, iov->iov_len, JDATA_USER); + } + } +} + +void +jrecord_leaf_xio(struct jrecord *jrec, int16_t rectype, xio_t xio) +{ + int bytes = xio->xio_npages * PAGE_SIZE; + + jrecord_write(jrec, rectype, bytes); + jrecord_data(jrec, xio, bytes, JDATA_XIO); } /* @@ -1537,7 +992,6 @@ jrecord_leaf(struct jrecord *jrec, int16_t rectype, void *ptr, int bytes) * CALL AND MAY BECOME INVALID AT ANY TIME. ONLY THE PUSH/POP CODE SHOULD * USE THE RETURN VALUE. */ -static struct journal_subrecord * jrecord_write(struct jrecord *jrec, int16_t rectype, int bytes) { @@ -1615,10 +1069,11 @@ jrecord_write(struct jrecord *jrec, int16_t rectype, int bytes) * subrecord header may become inaccessible due to stream record pushouts. */ static void -jrecord_data(struct jrecord *jrec, const void *buf, int bytes) +jrecord_data(struct jrecord *jrec, void *buf, int bytes, int dtype) { int pusheditout; int extsize; + int xio_offset = 0; KKASSERT(bytes >= 0 && bytes <= jrec->residual); @@ -1630,8 +1085,21 @@ jrecord_data(struct jrecord *jrec, const void *buf, int bytes) /* * Fill in any remaining space in the current stream record. */ - bcopy(buf, jrec->stream_ptr, jrec->stream_residual); - buf = (const char *)buf + jrec->stream_residual; + switch (dtype) { + case JDATA_KERN: + bcopy(buf, jrec->stream_ptr, jrec->stream_residual); + break; + case JDATA_USER: + copyin(buf, jrec->stream_ptr, jrec->stream_residual); + break; + case JDATA_XIO: + xio_copy_xtok((xio_t)buf, xio_offset, jrec->stream_ptr, + jrec->stream_residual); + xio_offset += jrec->stream_residual; + break; + } + if (dtype != JDATA_XIO) + buf = (char *)buf + jrec->stream_residual; bytes -= jrec->stream_residual; /*jrec->stream_ptr += jrec->stream_residual;*/ jrec->residual -= jrec->stream_residual; @@ -1664,7 +1132,17 @@ jrecord_data(struct jrecord *jrec, const void *buf, int bytes) * Push out any remaining bytes into the current stream record. */ if (bytes) { - bcopy(buf, jrec->stream_ptr, bytes); + switch (dtype) { + case JDATA_KERN: + bcopy(buf, jrec->stream_ptr, bytes); + break; + case JDATA_USER: + copyin(buf, jrec->stream_ptr, bytes); + break; + case JDATA_XIO: + xio_copy_xtok((xio_t)buf, xio_offset, jrec->stream_ptr, bytes); + break; + } jrec->stream_ptr += bytes; jrec->stream_residual -= bytes; jrec->residual -= bytes; @@ -1699,7 +1177,7 @@ jrecord_data(struct jrecord *jrec, const void *buf, int bytes) * The stream record will be committed or aborted as specified and jrecord * resources will be cleaned up. */ -static void +void jrecord_done(struct jrecord *jrec, int abortit) { KKASSERT(jrec->rawp != NULL); @@ -1734,7 +1212,7 @@ jrecord_done(struct jrecord *jrec, int abortit) * Write out a filename path relative to the base of the mount point. * rectype is typically JLEAF_PATH{1,2,3,4}. */ -static void +void jrecord_write_path(struct jrecord *jrec, int16_t rectype, struct namecache *ncp) { char buf[64]; /* local buffer if it fits, else malloced */ @@ -1746,32 +1224,33 @@ jrecord_write_path(struct jrecord *jrec, int16_t rectype, struct namecache *ncp) /* * Pass 1 - figure out the number of bytes required. Include terminating * \0 on last element and '/' separator on other elements. + * + * The namecache topology terminates at the root of the filesystem + * (the normal lookup code would then continue by using the mount + * structure to figure out what it was mounted on). */ again: pathlen = 0; - for (scan = ncp; - scan && (scan->nc_flag & NCF_MOUNTPT) == 0; - scan = scan->nc_parent - ) { - pathlen += scan->nc_nlen + 1; + for (scan = ncp; scan; scan = scan->nc_parent) { + if (scan->nc_nlen > 0) + pathlen += scan->nc_nlen + 1; } if (pathlen <= sizeof(buf)) base = buf; else - base = malloc(pathlen, M_TEMP, M_INTWAIT); + base = kmalloc(pathlen, M_TEMP, M_INTWAIT); /* * Pass 2 - generate the path buffer */ index = pathlen; - for (scan = ncp; - scan && (scan->nc_flag & NCF_MOUNTPT) == 0; - scan = scan->nc_parent - ) { + for (scan = ncp; scan; scan = scan->nc_parent) { + if (scan->nc_nlen == 0) + continue; if (scan->nc_nlen >= index) { if (base != buf) - free(base, M_TEMP); + kfree(base, M_TEMP); goto again; } if (index == pathlen) @@ -1783,14 +1262,14 @@ again: } jrecord_leaf(jrec, rectype, base + index, pathlen - index); if (base != buf) - free(base, M_TEMP); + kfree(base, M_TEMP); } /* * Write out a file attribute structure. While somewhat inefficient, using * a recursive data structure is the most portable and extensible way. */ -static void +void jrecord_write_vattr(struct jrecord *jrec, struct vattr *vat) { void *save; @@ -1822,8 +1301,12 @@ jrecord_write_vattr(struct jrecord *jrec, struct vattr *vat) jrecord_leaf(jrec, JLEAF_GEN, &vat->va_gen, sizeof(vat->va_gen)); if (vat->va_flags != VNOVAL) jrecord_leaf(jrec, JLEAF_FLAGS, &vat->va_flags, sizeof(vat->va_flags)); - if (vat->va_rdev != VNOVAL) - jrecord_leaf(jrec, JLEAF_UDEV, &vat->va_rdev, sizeof(vat->va_rdev)); + if (vat->va_rmajor != VNOVAL) { + dev_t rdev = makeudev(vat->va_rmajor, vat->va_rminor); + jrecord_leaf(jrec, JLEAF_UDEV, &rdev, sizeof(rdev)); + jrecord_leaf(jrec, JLEAF_UMAJOR, &vat->va_rmajor, sizeof(vat->va_rmajor)); + jrecord_leaf(jrec, JLEAF_UMINOR, &vat->va_rminor, sizeof(vat->va_rminor)); + } #if 0 if (vat->va_filerev != VNOVAL) jrecord_leaf(jrec, JLEAF_FILEREV, &vat->va_filerev, sizeof(vat->va_filerev)); @@ -1839,7 +1322,7 @@ jrecord_write_vattr(struct jrecord *jrec, struct vattr *vat) * XXX additional tracking info * XXX tty line info */ -static void +void jrecord_write_cred(struct jrecord *jrec, struct thread *td, struct ucred *cred) { void *save; @@ -1862,62 +1345,66 @@ jrecord_write_cred(struct jrecord *jrec, struct thread *td, struct ucred *cred) * and in fact avoid writing out the file path for seqential writes * occuring within e.g. a certain period of time. */ -static void +void jrecord_write_vnode_ref(struct jrecord *jrec, struct vnode *vp) { - struct namecache *ncp; + struct nchandle nch; - TAILQ_FOREACH(ncp, &vp->v_namecache, nc_vnode) { - if ((ncp->nc_flag & (NCF_UNRESOLVED|NCF_DESTROYED)) == 0) + nch.mount = vp->v_mount; + spin_lock(&vp->v_spin); + TAILQ_FOREACH(nch.ncp, &vp->v_namecache, nc_vnode) { + if ((nch.ncp->nc_flag & (NCF_UNRESOLVED|NCF_DESTROYED)) == 0) break; } - if (ncp) - jrecord_write_path(jrec, JLEAF_PATH_REF, ncp); + if (nch.ncp) { + cache_hold(&nch); + spin_unlock(&vp->v_spin); + jrecord_write_path(jrec, JLEAF_PATH_REF, nch.ncp); + cache_drop(&nch); + } else { + spin_unlock(&vp->v_spin); + } } -static void +void jrecord_write_vnode_link(struct jrecord *jrec, struct vnode *vp, struct namecache *notncp) { - struct namecache *ncp; + struct nchandle nch; - TAILQ_FOREACH(ncp, &vp->v_namecache, nc_vnode) { - if (ncp == notncp) + nch.mount = vp->v_mount; + spin_lock(&vp->v_spin); + TAILQ_FOREACH(nch.ncp, &vp->v_namecache, nc_vnode) { + if (nch.ncp == notncp) continue; - if ((ncp->nc_flag & (NCF_UNRESOLVED|NCF_DESTROYED)) == 0) + if ((nch.ncp->nc_flag & (NCF_UNRESOLVED|NCF_DESTROYED)) == 0) break; } - if (ncp) - jrecord_write_path(jrec, JLEAF_PATH_REF, ncp); -} - -#if 0 -/* - * Write out the current contents of the file within the specified - * range. This is typically called from within an UNDO section. A - * locked vnode must be passed. - */ -static int -jrecord_write_filearea(struct jrecord *jrec, struct vnode *vp, - off_t begoff, off_t endoff) -{ + if (nch.ncp) { + cache_hold(&nch); + spin_unlock(&vp->v_spin); + jrecord_write_path(jrec, JLEAF_PATH_REF, nch.ncp); + cache_drop(&nch); + } else { + spin_unlock(&vp->v_spin); + } } -#endif /* * Write out the data represented by a pagelist */ -static void +void jrecord_write_pagelist(struct jrecord *jrec, int16_t rectype, struct vm_page **pglist, int *rtvals, int pgcount, off_t offset) { - struct msf_buf *msf; + struct xio xio; int error; int b; int i; i = 0; + xio_init(&xio); while (i < pgcount) { /* * Find the next valid section. Skip any invalid elements @@ -1943,16 +1430,14 @@ jrecord_write_pagelist(struct jrecord *jrec, int16_t rectype, * And write it out. */ if (i - b) { - error = msf_map_pagelist(&msf, pglist + b, i - b, 0); + error = xio_init_pages(&xio, pglist + b, i - b, XIOF_READ); if (error == 0) { - printf("RECORD PUTPAGES %d\n", msf_buf_bytes(msf)); jrecord_leaf(jrec, JLEAF_SEEKPOS, &offset, sizeof(offset)); - jrecord_leaf(jrec, rectype, - msf_buf_kva(msf), msf_buf_bytes(msf)); - msf_buf_free(msf); + jrecord_leaf_xio(jrec, rectype, &xio); } else { - printf("jrecord_write_pagelist: mapping failure\n"); + kprintf("jrecord_write_pagelist: xio init failure\n"); } + xio_release(&xio); offset += (off_t)(i - b) << PAGE_SHIFT; } } @@ -1961,38 +1446,17 @@ jrecord_write_pagelist(struct jrecord *jrec, int16_t rectype, /* * Write out the data represented by a UIO. */ -struct jwuio_info { - struct jrecord *jrec; - int16_t rectype; -}; - -static int jrecord_write_uio_callback(void *info, char *buf, int bytes); - -static void +void jrecord_write_uio(struct jrecord *jrec, int16_t rectype, struct uio *uio) { - struct jwuio_info info = { jrec, rectype }; - int error; - if (uio->uio_segflg != UIO_NOCOPY) { jrecord_leaf(jrec, JLEAF_SEEKPOS, &uio->uio_offset, sizeof(uio->uio_offset)); - error = msf_uio_iterate(uio, jrecord_write_uio_callback, &info); - if (error) - printf("XXX warning uio iterate failed %d\n", error); + jrecord_leaf_uio(jrec, rectype, uio); } } -static int -jrecord_write_uio_callback(void *info_arg, char *buf, int bytes) -{ - struct jwuio_info *info = info_arg; - - jrecord_leaf(info->jrec, info->rectype, buf, bytes); - return(0); -} - -static void +void jrecord_file_data(struct jrecord *jrec, struct vnode *vp, off_t off, off_t bytes) { @@ -2001,7 +1465,7 @@ jrecord_file_data(struct jrecord *jrec, struct vnode *vp, int error; int n; - buf = malloc(bufsize, M_JOURNAL, M_WAITOK); + buf = kmalloc(bufsize, M_JOURNAL, M_WAITOK); jrecord_leaf(jrec, JLEAF_SEEKPOS, &off, sizeof(off)); while (bytes) { n = (bytes > bufsize) ? bufsize : (int)bytes; @@ -2015,677 +1479,6 @@ jrecord_file_data(struct jrecord *jrec, struct vnode *vp, bytes -= n; off += n; } - free(buf, M_JOURNAL); -} - -/************************************************************************ - * LOW LEVEL UNDO SUPPORT ROUTINE * - ************************************************************************ - * - * This function is used to support UNDO records. It will generate an - * appropriate record with the requested portion of the file data. Note - * that file data is only recorded if JRUNDO_FILEDATA is passed. If bytes - * is -1, it will be set to the size of the file. - */ -static void -jrecord_undo_file(struct jrecord *jrec, struct vnode *vp, int jrflags, - off_t off, off_t bytes) -{ - struct vattr attr; - void *save1; /* warning, save pointers do not always remain valid */ - void *save2; - int error; - - /* - * Setup. Start the UNDO record, obtain a shared lock on the vnode, - * and retrieve attribute info. - */ - save1 = jrecord_push(jrec, JTYPE_UNDO); - error = VOP_GETATTR(vp, &attr); - if (error) - goto done; - - /* - * Generate UNDO records as requested. - */ - if (jrflags & JRUNDO_VATTR) { - save2 = jrecord_push(jrec, JTYPE_VATTR); - jrecord_leaf(jrec, JLEAF_VTYPE, &attr.va_type, sizeof(attr.va_type)); - if ((jrflags & JRUNDO_NLINK) && attr.va_nlink != VNOVAL) - jrecord_leaf(jrec, JLEAF_NLINK, &attr.va_nlink, sizeof(attr.va_nlink)); - if ((jrflags & JRUNDO_SIZE) && attr.va_size != VNOVAL) - jrecord_leaf(jrec, JLEAF_SIZE, &attr.va_size, sizeof(attr.va_size)); - if ((jrflags & JRUNDO_UID) && attr.va_uid != VNOVAL) - jrecord_leaf(jrec, JLEAF_UID, &attr.va_uid, sizeof(attr.va_uid)); - if ((jrflags & JRUNDO_GID) && attr.va_gid != VNOVAL) - jrecord_leaf(jrec, JLEAF_GID, &attr.va_gid, sizeof(attr.va_gid)); - if ((jrflags & JRUNDO_FSID) && attr.va_fsid != VNOVAL) - jrecord_leaf(jrec, JLEAF_FSID, &attr.va_fsid, sizeof(attr.va_fsid)); - if ((jrflags & JRUNDO_MODES) && attr.va_mode != (mode_t)VNOVAL) - jrecord_leaf(jrec, JLEAF_MODES, &attr.va_mode, sizeof(attr.va_mode)); - if ((jrflags & JRUNDO_INUM) && attr.va_fileid != VNOVAL) - jrecord_leaf(jrec, JLEAF_INUM, &attr.va_fileid, sizeof(attr.va_fileid)); - if ((jrflags & JRUNDO_ATIME) && attr.va_atime.tv_sec != VNOVAL) - jrecord_leaf(jrec, JLEAF_ATIME, &attr.va_atime, sizeof(attr.va_atime)); - if ((jrflags & JRUNDO_MTIME) && attr.va_mtime.tv_sec != VNOVAL) - jrecord_leaf(jrec, JLEAF_MTIME, &attr.va_mtime, sizeof(attr.va_mtime)); - if ((jrflags & JRUNDO_CTIME) && attr.va_ctime.tv_sec != VNOVAL) - jrecord_leaf(jrec, JLEAF_CTIME, &attr.va_ctime, sizeof(attr.va_ctime)); - if ((jrflags & JRUNDO_GEN) && attr.va_gen != VNOVAL) - jrecord_leaf(jrec, JLEAF_GEN, &attr.va_gen, sizeof(attr.va_gen)); - if ((jrflags & JRUNDO_FLAGS) && attr.va_flags != VNOVAL) - jrecord_leaf(jrec, JLEAF_FLAGS, &attr.va_flags, sizeof(attr.va_flags)); - if ((jrflags & JRUNDO_UDEV) && attr.va_rdev != VNOVAL) - jrecord_leaf(jrec, JLEAF_UDEV, &attr.va_rdev, sizeof(attr.va_rdev)); - jrecord_pop(jrec, save2); - } - - /* - * Output the file data being overwritten by reading the file and - * writing it out to the journal prior to the write operation. We - * do not need to write out data past the current file EOF. - * - * XXX support JRUNDO_CONDLINK - do not write out file data for files - * with a link count > 1. The undo code needs to locate the inode and - * regenerate the hardlink. - */ - if ((jrflags & JRUNDO_FILEDATA) && attr.va_type == VREG) { - if (attr.va_size != VNOVAL) { - if (bytes == -1) - bytes = attr.va_size - off; - if (off + bytes > attr.va_size) - bytes = attr.va_size - off; - if (bytes > 0) - jrecord_file_data(jrec, vp, off, bytes); - } else { - error = EINVAL; - } - } - if ((jrflags & JRUNDO_FILEDATA) && attr.va_type == VLNK) { - struct iovec aiov; - struct uio auio; - char *buf; - - buf = malloc(PATH_MAX, M_JOURNAL, M_WAITOK); - aiov.iov_base = buf; - aiov.iov_len = PATH_MAX; - auio.uio_iov = &aiov; - auio.uio_iovcnt = 1; - auio.uio_offset = 0; - auio.uio_rw = UIO_READ; - auio.uio_segflg = UIO_SYSSPACE; - auio.uio_td = curthread; - auio.uio_resid = PATH_MAX; - error = VOP_READLINK(vp, &auio, proc0.p_ucred); - if (error == 0) { - jrecord_leaf(jrec, JLEAF_SYMLINKDATA, buf, - PATH_MAX - auio.uio_resid); - } - free(buf, M_JOURNAL); - } -done: - if (error) - jrecord_leaf(jrec, JLEAF_ERROR, &error, sizeof(error)); - jrecord_pop(jrec, save1); -} - -/************************************************************************ - * JOURNAL VNOPS * - ************************************************************************ - * - * These are function shims replacing the normal filesystem ops. We become - * responsible for calling the underlying filesystem ops. We have the choice - * of executing the underlying op first and then generating the journal entry, - * or starting the journal entry, executing the underlying op, and then - * either completing or aborting it. - * - * The journal is supposed to be a high-level entity, which generally means - * identifying files by name rather then by inode. Supplying both allows - * the journal to be used both for inode-number-compatible 'mirrors' and - * for simple filesystem replication. - * - * Writes are particularly difficult to deal with because a single write may - * represent a hundred megabyte buffer or more, and both writes and truncations - * require the 'old' data to be written out as well as the new data if the - * log is reversable. Other issues: - * - * - How to deal with operations on unlinked files (no path available), - * but which may still be filesystem visible due to hard links. - * - * - How to deal with modifications made via a memory map. - * - * - Future cache coherency support will require cache coherency API calls - * both prior to and after the call to the underlying VFS. - * - * ALSO NOTE: We do not have to shim compatibility VOPs like MKDIR which have - * new VFS equivalents (NMKDIR). - */ - -/* - * Journal vop_settattr { a_vp, a_vap, a_cred, a_td } - */ -static -int -journal_setattr(struct vop_setattr_args *ap) -{ - struct jrecord_list jreclist; - struct jrecord jreccache; - struct jrecord *jrec; - struct mount *mp; - void *save; - int error; - - mp = ap->a_head.a_ops->vv_mount; - if (jreclist_init(mp, &jreclist, &jreccache, JTYPE_SETATTR)) { - jreclist_undo_file(&jreclist, ap->a_vp, JRUNDO_VATTR, 0, 0); - } - error = vop_journal_operate_ap(&ap->a_head); - if (error == 0) { - TAILQ_FOREACH(jrec, &jreclist.list, user_entry) { - jrecord_write_cred(jrec, curthread, ap->a_cred); - jrecord_write_vnode_ref(jrec, ap->a_vp); - save = jrecord_push(jrec, JTYPE_REDO); - jrecord_write_vattr(jrec, ap->a_vap); - jrecord_pop(jrec, save); - } - } - jreclist_done(mp, &jreclist, error); - return (error); -} - -/* - * Journal vop_write { a_vp, a_uio, a_ioflag, a_cred } - */ -static -int -journal_write(struct vop_write_args *ap) -{ - struct jrecord_list jreclist; - struct jrecord jreccache; - struct jrecord *jrec; - struct mount *mp; - struct uio uio_copy; - struct iovec uio_one_iovec; - void *save; - int error; - - /* - * This is really nasty. UIO's don't retain sufficient information to - * be reusable once they've gone through the VOP chain. The iovecs get - * cleared, so we have to copy the UIO. - * - * XXX fix the UIO code to not destroy iov's during a scan so we can - * reuse the uio over and over again. - * - * XXX UNDO code needs to journal the old data prior to the write. - */ - uio_copy = *ap->a_uio; - if (uio_copy.uio_iovcnt == 1) { - uio_one_iovec = ap->a_uio->uio_iov[0]; - uio_copy.uio_iov = &uio_one_iovec; - } else { - uio_copy.uio_iov = malloc(uio_copy.uio_iovcnt * sizeof(struct iovec), - M_JOURNAL, M_WAITOK); - bcopy(ap->a_uio->uio_iov, uio_copy.uio_iov, - uio_copy.uio_iovcnt * sizeof(struct iovec)); - } - - /* - * Write out undo data. Note that uio_offset is incorrect if - * IO_APPEND is set, but fortunately we have no undo file data to - * write out in that case. - */ - mp = ap->a_head.a_ops->vv_mount; - if (jreclist_init(mp, &jreclist, &jreccache, JTYPE_WRITE)) { - if (ap->a_ioflag & IO_APPEND) { - jreclist_undo_file(&jreclist, ap->a_vp, JRUNDO_SIZE|JRUNDO_MTIME, 0, 0); - } else { - jreclist_undo_file(&jreclist, ap->a_vp, - JRUNDO_FILEDATA|JRUNDO_SIZE|JRUNDO_MTIME, - uio_copy.uio_offset, uio_copy.uio_resid); - } - } - error = vop_journal_operate_ap(&ap->a_head); - - /* - * XXX bad hack to figure out the offset for O_APPEND writes (note: - * uio field state after the VFS operation). - */ - uio_copy.uio_offset = ap->a_uio->uio_offset - - (uio_copy.uio_resid - ap->a_uio->uio_resid); - - /* - * Output the write data to the journal. - */ - if (error == 0) { - TAILQ_FOREACH(jrec, &jreclist.list, user_entry) { - jrecord_write_cred(jrec, NULL, ap->a_cred); - jrecord_write_vnode_ref(jrec, ap->a_vp); - save = jrecord_push(jrec, JTYPE_REDO); - jrecord_write_uio(jrec, JLEAF_FILEDATA, &uio_copy); - jrecord_pop(jrec, save); - } - } - jreclist_done(mp, &jreclist, error); - - if (uio_copy.uio_iov != &uio_one_iovec) - free(uio_copy.uio_iov, M_JOURNAL); - return (error); -} - -/* - * Journal vop_fsync { a_vp, a_waitfor, a_td } - */ -static -int -journal_fsync(struct vop_fsync_args *ap) -{ -#if 0 - struct mount *mp; - struct journal *jo; -#endif - int error; - - error = vop_journal_operate_ap(&ap->a_head); -#if 0 - mp = ap->a_head.a_ops->vv_mount; - if (error == 0) { - TAILQ_FOREACH(jo, &mp->mnt_jlist, jentry) { - /* XXX synchronize pending journal records */ - } - } -#endif - return (error); -} - -/* - * Journal vop_putpages { a_vp, a_m, a_count, a_sync, a_rtvals, a_offset } - * - * note: a_count is in bytes. - */ -static -int -journal_putpages(struct vop_putpages_args *ap) -{ - struct jrecord_list jreclist; - struct jrecord jreccache; - struct jrecord *jrec; - struct mount *mp; - void *save; - int error; - - mp = ap->a_head.a_ops->vv_mount; - if (jreclist_init(mp, &jreclist, &jreccache, JTYPE_PUTPAGES) && - ap->a_count > 0 - ) { - jreclist_undo_file(&jreclist, ap->a_vp, - JRUNDO_FILEDATA|JRUNDO_SIZE|JRUNDO_MTIME, - ap->a_offset, btoc(ap->a_count)); - } - error = vop_journal_operate_ap(&ap->a_head); - if (error == 0 && ap->a_count > 0) { - TAILQ_FOREACH(jrec, &jreclist.list, user_entry) { - jrecord_write_vnode_ref(jrec, ap->a_vp); - save = jrecord_push(jrec, JTYPE_REDO); - jrecord_write_pagelist(jrec, JLEAF_FILEDATA, ap->a_m, ap->a_rtvals, - btoc(ap->a_count), ap->a_offset); - jrecord_pop(jrec, save); - } - } - jreclist_done(mp, &jreclist, error); - return (error); -} - -/* - * Journal vop_setacl { a_vp, a_type, a_aclp, a_cred, a_td } - */ -static -int -journal_setacl(struct vop_setacl_args *ap) -{ - struct jrecord_list jreclist; - struct jrecord jreccache; - struct jrecord *jrec; - struct mount *mp; - int error; - - mp = ap->a_head.a_ops->vv_mount; - jreclist_init(mp, &jreclist, &jreccache, JTYPE_SETACL); - error = vop_journal_operate_ap(&ap->a_head); - if (error == 0) { - TAILQ_FOREACH(jrec, &jreclist.list, user_entry) { -#if 0 - if ((jo->flags & MC_JOURNAL_WANT_REVERSABLE)) - jrecord_undo_file(jrec, ap->a_vp, JRUNDO_XXX, 0, 0); -#endif - jrecord_write_cred(jrec, curthread, ap->a_cred); - jrecord_write_vnode_ref(jrec, ap->a_vp); -#if 0 - save = jrecord_push(jrec, JTYPE_REDO); - /* XXX type, aclp */ - jrecord_pop(jrec, save); -#endif - } - } - jreclist_done(mp, &jreclist, error); - return (error); -} - -/* - * Journal vop_setextattr { a_vp, a_name, a_uio, a_cred, a_td } - */ -static -int -journal_setextattr(struct vop_setextattr_args *ap) -{ - struct jrecord_list jreclist; - struct jrecord jreccache; - struct jrecord *jrec; - struct mount *mp; - void *save; - int error; - - mp = ap->a_head.a_ops->vv_mount; - jreclist_init(mp, &jreclist, &jreccache, JTYPE_SETEXTATTR); - error = vop_journal_operate_ap(&ap->a_head); - if (error == 0) { - TAILQ_FOREACH(jrec, &jreclist.list, user_entry) { -#if 0 - if ((jo->flags & MC_JOURNAL_WANT_REVERSABLE)) - jrecord_undo_file(jrec, ap->a_vp, JRUNDO_XXX, 0, 0); -#endif - jrecord_write_cred(jrec, curthread, ap->a_cred); - jrecord_write_vnode_ref(jrec, ap->a_vp); - jrecord_leaf(jrec, JLEAF_ATTRNAME, ap->a_name, strlen(ap->a_name)); - save = jrecord_push(jrec, JTYPE_REDO); - jrecord_write_uio(jrec, JLEAF_FILEDATA, ap->a_uio); - jrecord_pop(jrec, save); - } - } - jreclist_done(mp, &jreclist, error); - return (error); -} - -/* - * Journal vop_ncreate { a_ncp, a_vpp, a_cred, a_vap } - */ -static -int -journal_ncreate(struct vop_ncreate_args *ap) -{ - struct jrecord_list jreclist; - struct jrecord jreccache; - struct jrecord *jrec; - struct mount *mp; - void *save; - int error; - - mp = ap->a_head.a_ops->vv_mount; - jreclist_init(mp, &jreclist, &jreccache, JTYPE_CREATE); - error = vop_journal_operate_ap(&ap->a_head); - if (error == 0) { - TAILQ_FOREACH(jrec, &jreclist.list, user_entry) { - jrecord_write_cred(jrec, NULL, ap->a_cred); - jrecord_write_path(jrec, JLEAF_PATH1, ap->a_ncp); - if (*ap->a_vpp) - jrecord_write_vnode_ref(jrec, *ap->a_vpp); - save = jrecord_push(jrec, JTYPE_REDO); - jrecord_write_vattr(jrec, ap->a_vap); - jrecord_pop(jrec, save); - } - } - jreclist_done(mp, &jreclist, error); - return (error); -} - -/* - * Journal vop_nmknod { a_ncp, a_vpp, a_cred, a_vap } - */ -static -int -journal_nmknod(struct vop_nmknod_args *ap) -{ - struct jrecord_list jreclist; - struct jrecord jreccache; - struct jrecord *jrec; - struct mount *mp; - void *save; - int error; - - mp = ap->a_head.a_ops->vv_mount; - jreclist_init(mp, &jreclist, &jreccache, JTYPE_MKNOD); - error = vop_journal_operate_ap(&ap->a_head); - if (error == 0) { - TAILQ_FOREACH(jrec, &jreclist.list, user_entry) { - jrecord_write_cred(jrec, NULL, ap->a_cred); - jrecord_write_path(jrec, JLEAF_PATH1, ap->a_ncp); - save = jrecord_push(jrec, JTYPE_REDO); - jrecord_write_vattr(jrec, ap->a_vap); - jrecord_pop(jrec, save); - if (*ap->a_vpp) - jrecord_write_vnode_ref(jrec, *ap->a_vpp); - } - } - jreclist_done(mp, &jreclist, error); - return (error); -} - -/* - * Journal vop_nlink { a_ncp, a_vp, a_cred } - */ -static -int -journal_nlink(struct vop_nlink_args *ap) -{ - struct jrecord_list jreclist; - struct jrecord jreccache; - struct jrecord *jrec; - struct mount *mp; - void *save; - int error; - - mp = ap->a_head.a_ops->vv_mount; - jreclist_init(mp, &jreclist, &jreccache, JTYPE_LINK); - error = vop_journal_operate_ap(&ap->a_head); - if (error == 0) { - TAILQ_FOREACH(jrec, &jreclist.list, user_entry) { - jrecord_write_cred(jrec, NULL, ap->a_cred); - jrecord_write_path(jrec, JLEAF_PATH1, ap->a_ncp); - /* XXX PATH to VP and inode number */ - /* XXX this call may not record the correct path when - * multiple paths are available */ - save = jrecord_push(jrec, JTYPE_REDO); - jrecord_write_vnode_link(jrec, ap->a_vp, ap->a_ncp); - jrecord_pop(jrec, save); - } - } - jreclist_done(mp, &jreclist, error); - return (error); -} - -/* - * Journal vop_symlink { a_ncp, a_vpp, a_cred, a_vap, a_target } - */ -static -int -journal_nsymlink(struct vop_nsymlink_args *ap) -{ - struct jrecord_list jreclist; - struct jrecord jreccache; - struct jrecord *jrec; - struct mount *mp; - void *save; - int error; - - mp = ap->a_head.a_ops->vv_mount; - jreclist_init(mp, &jreclist, &jreccache, JTYPE_SYMLINK); - error = vop_journal_operate_ap(&ap->a_head); - if (error == 0) { - TAILQ_FOREACH(jrec, &jreclist.list, user_entry) { - jrecord_write_cred(jrec, NULL, ap->a_cred); - jrecord_write_path(jrec, JLEAF_PATH1, ap->a_ncp); - save = jrecord_push(jrec, JTYPE_REDO); - jrecord_leaf(jrec, JLEAF_SYMLINKDATA, - ap->a_target, strlen(ap->a_target)); - jrecord_pop(jrec, save); - if (*ap->a_vpp) - jrecord_write_vnode_ref(jrec, *ap->a_vpp); - } - } - jreclist_done(mp, &jreclist, error); - return (error); -} - -/* - * Journal vop_nwhiteout { a_ncp, a_cred, a_flags } - */ -static -int -journal_nwhiteout(struct vop_nwhiteout_args *ap) -{ - struct jrecord_list jreclist; - struct jrecord jreccache; - struct jrecord *jrec; - struct mount *mp; - int error; - - mp = ap->a_head.a_ops->vv_mount; - jreclist_init(mp, &jreclist, &jreccache, JTYPE_WHITEOUT); - error = vop_journal_operate_ap(&ap->a_head); - if (error == 0) { - TAILQ_FOREACH(jrec, &jreclist.list, user_entry) { - jrecord_write_cred(jrec, NULL, ap->a_cred); - jrecord_write_path(jrec, JLEAF_PATH1, ap->a_ncp); - } - } - jreclist_done(mp, &jreclist, error); - return (error); -} - -/* - * Journal vop_nremove { a_ncp, a_cred } - */ -static -int -journal_nremove(struct vop_nremove_args *ap) -{ - struct jrecord_list jreclist; - struct jrecord jreccache; - struct jrecord *jrec; - struct mount *mp; - int error; - - mp = ap->a_head.a_ops->vv_mount; - if (jreclist_init(mp, &jreclist, &jreccache, JTYPE_REMOVE) && - ap->a_ncp->nc_vp - ) { - jreclist_undo_file(&jreclist, ap->a_ncp->nc_vp, - JRUNDO_ALL|JRUNDO_GETVP|JRUNDO_CONDLINK, 0, -1); - } - error = vop_journal_operate_ap(&ap->a_head); - if (error == 0) { - TAILQ_FOREACH(jrec, &jreclist.list, user_entry) { - jrecord_write_cred(jrec, NULL, ap->a_cred); - jrecord_write_path(jrec, JLEAF_PATH1, ap->a_ncp); - } - } - jreclist_done(mp, &jreclist, error); - return (error); -} - -/* - * Journal vop_nmkdir { a_ncp, a_vpp, a_cred, a_vap } - */ -static -int -journal_nmkdir(struct vop_nmkdir_args *ap) -{ - struct jrecord_list jreclist; - struct jrecord jreccache; - struct jrecord *jrec; - struct mount *mp; - int error; - - mp = ap->a_head.a_ops->vv_mount; - jreclist_init(mp, &jreclist, &jreccache, JTYPE_MKDIR); - error = vop_journal_operate_ap(&ap->a_head); - if (error == 0) { - TAILQ_FOREACH(jrec, &jreclist.list, user_entry) { -#if 0 - if (jo->flags & MC_JOURNAL_WANT_AUDIT) { - jrecord_write_audit(jrec); - } -#endif - jrecord_write_path(jrec, JLEAF_PATH1, ap->a_ncp); - jrecord_write_cred(jrec, NULL, ap->a_cred); - jrecord_write_vattr(jrec, ap->a_vap); - jrecord_write_path(jrec, JLEAF_PATH1, ap->a_ncp); - if (*ap->a_vpp) - jrecord_write_vnode_ref(jrec, *ap->a_vpp); - } - } - jreclist_done(mp, &jreclist, error); - return (error); -} - -/* - * Journal vop_nrmdir { a_ncp, a_cred } - */ -static -int -journal_nrmdir(struct vop_nrmdir_args *ap) -{ - struct jrecord_list jreclist; - struct jrecord jreccache; - struct jrecord *jrec; - struct mount *mp; - int error; - - mp = ap->a_head.a_ops->vv_mount; - if (jreclist_init(mp, &jreclist, &jreccache, JTYPE_RMDIR)) { - jreclist_undo_file(&jreclist, ap->a_ncp->nc_vp, - JRUNDO_VATTR|JRUNDO_GETVP, 0, 0); - } - error = vop_journal_operate_ap(&ap->a_head); - if (error == 0) { - TAILQ_FOREACH(jrec, &jreclist.list, user_entry) { - jrecord_write_cred(jrec, NULL, ap->a_cred); - jrecord_write_path(jrec, JLEAF_PATH1, ap->a_ncp); - } - } - jreclist_done(mp, &jreclist, error); - return (error); -} - -/* - * Journal vop_nrename { a_fncp, a_tncp, a_cred } - */ -static -int -journal_nrename(struct vop_nrename_args *ap) -{ - struct jrecord_list jreclist; - struct jrecord jreccache; - struct jrecord *jrec; - struct mount *mp; - int error; - - mp = ap->a_head.a_ops->vv_mount; - if (jreclist_init(mp, &jreclist, &jreccache, JTYPE_RENAME) && - ap->a_tncp->nc_vp - ) { - jreclist_undo_file(&jreclist, ap->a_tncp->nc_vp, - JRUNDO_ALL|JRUNDO_GETVP|JRUNDO_CONDLINK, 0, -1); - } - error = vop_journal_operate_ap(&ap->a_head); - if (error == 0) { - TAILQ_FOREACH(jrec, &jreclist.list, user_entry) { - jrecord_write_cred(jrec, NULL, ap->a_cred); - jrecord_write_path(jrec, JLEAF_PATH1, ap->a_fncp); - jrecord_write_path(jrec, JLEAF_PATH2, ap->a_tncp); - } - } - jreclist_done(mp, &jreclist, error); - return (error); + kfree(buf, M_JOURNAL); }