/*
- * 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 <dillon@backplane.com>
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
- * $DragonFly: src/sys/kern/vfs_jops.c,v 1.26 2006/05/07 00:24:56 dillon Exp $
+ * $DragonFly: src/sys/kern/vfs_jops.c,v 1.27 2006/05/08 18:45:51 dillon Exp $
*/
/*
* Each mount point may have zero or more independantly configured journals
* 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
- * explicit acknowledgement schemes will be supported, depending on the
- * sophistication of the journaling stream, plus resynchronization and
- * restart when a journaling stream is interrupted. This information will
- * also be made available to journaling-aware filesystems to allow better
- * management of their own physical storage synchronization mechanisms as
- * well as to allow such filesystems to take direct advantage of the kernel's
- * journaling layer so they don't have to roll their own.
- *
- * In addition, the worker thread will have access to much larger
- * spooling areas then the memory buffer is able to provide by e.g.
- * reserving swap space, in order to absorb potentially long interruptions
- * of off-site journaling streams, and to prevent 'slow' off-site linkages
- * from radically slowing down local filesystem operations.
- *
- * Because of the non-trivial algorithms the journaling system will be
- * required to support, use of a worker thread is mandatory. Efficiencies
- * are maintained by utilitizing the memory FIFO to batch transactions when
- * possible, reducing the number of gratuitous thread switches and taking
- * advantage of cpu caches through the use of shorter batched code paths
- * rather then trying to do everything in the context of the process
- * originating the filesystem op. In the future the memory FIFO can be
- * made per-cpu to remove BGL or other locking requirements.
*/
#include <sys/param.h>
#include <sys/systm.h>
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);
-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_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 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);
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);
- 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);
- lwkt_setpri(&jo->rthread, TDPRI_KERN_DAEMON);
- lwkt_schedule(&jo->rthread);
- }
-}
-
-static void
-journal_destroy_threads(struct journal *jo, int flags)
-{
- int wcount;
-
- jo->flags |= MC_JOURNAL_STOP_REQ | (flags & MC_JOURNAL_STOP_IMM);
- wakeup(&jo->fifo);
- wcount = 0;
- 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",
- jo->id);
- }
- }
-
- /*
- * XXX SMP - threads should move to cpu requesting the restart or
- * termination before finishing up to properly interlock.
- */
- tsleep(jo, 0, "jwait", hz);
- lwkt_free_thread(&jo->wthread);
- if (jo->flags & MC_JOURNAL_WANT_FULLDUPLEX)
- lwkt_free_thread(&jo->rthread);
-}
-
-/*
- * The per-journal worker thread is responsible for writing out the
- * journal's FIFO to the target stream.
- */
-static void
-journal_wthread(void *info)
-{
- struct journal *jo = info;
- struct journal_rawrecbeg *rawp;
- int bytes;
- int error;
- int avail;
- int res;
-
- for (;;) {
- /*
- * Calculate the number of bytes available to write. This buffer
- * area may contain reserved records so we can't just write it out
- * without further checks.
- */
- bytes = jo->fifo.windex - jo->fifo.rindex;
-
- /*
- * sleep if no bytes are available or if an incomplete record is
- * encountered (it needs to be filled in before we can write it
- * out), and skip any pad records that we encounter.
- */
- if (bytes == 0) {
- if (jo->flags & MC_JOURNAL_STOP_REQ)
- break;
- tsleep(&jo->fifo, 0, "jfifo", hz);
- continue;
- }
-
- /*
- * Sleep if we can not go any further due to hitting an incomplete
- * record. This case should occur rarely but may have to be better
- * optimized XXX.
- */
- rawp = (void *)(jo->fifo.membase + (jo->fifo.rindex & jo->fifo.mask));
- if (rawp->begmagic == JREC_INCOMPLETEMAGIC) {
- tsleep(&jo->fifo, 0, "jpad", hz);
- continue;
- }
-
- /*
- * Skip any pad records. We do not write out pad records if we can
- * help it.
- */
- if (rawp->streamid == JREC_STREAMID_PAD) {
- if ((jo->flags & MC_JOURNAL_WANT_FULLDUPLEX) == 0) {
- if (jo->fifo.rindex == jo->fifo.xindex) {
- jo->fifo.xindex += (rawp->recsize + 15) & ~15;
- jo->total_acked += (rawp->recsize + 15) & ~15;
- }
- }
- jo->fifo.rindex += (rawp->recsize + 15) & ~15;
- jo->total_acked += bytes;
- KKASSERT(jo->fifo.windex - jo->fifo.rindex >= 0);
- continue;
- }
-
- /*
- * 'bytes' is the amount of data that can potentially be written out.
- * Calculate 'res', the amount of data that can actually be written
- * out. res is bounded either by hitting the end of the physical
- * memory buffer or by hitting an incomplete record. Incomplete
- * records often occur due to the way the space reservation model
- * works.
- */
- res = 0;
- avail = jo->fifo.size - (jo->fifo.rindex & jo->fifo.mask);
- while (res < bytes && rawp->begmagic == JREC_BEGMAGIC) {
- res += (rawp->recsize + 15) & ~15;
- if (res >= avail) {
- KKASSERT(res == avail);
- break;
- }
- rawp = (void *)((char *)rawp + ((rawp->recsize + 15) & ~15));
- }
-
- /*
- * Issue the write and deal with any errors or other conditions.
- * For now assume blocking I/O. Since we are record-aware the
- * code cannot yet handle partial writes.
- *
- * We bump rindex prior to issuing the write to avoid racing
- * the acknowledgement coming back (which could prevent the ack
- * from bumping xindex). Restarts are always based on xindex so
- * we do not try to undo the rindex if an error occurs.
- *
- * XXX EWOULDBLOCK/NBIO
- * XXX notification on failure
- * XXX permanent verses temporary failures
- * XXX two-way acknowledgement stream in the return direction / xindex
- */
- bytes = res;
- jo->fifo.rindex += bytes;
- error = fp_write(jo->fp,
- jo->fifo.membase + ((jo->fifo.rindex - bytes) & jo->fifo.mask),
- bytes, &res);
- if (error) {
- printf("journal_thread(%s) write, error %d\n", jo->id, error);
- /* XXX */
- } else {
- KKASSERT(res == bytes);
- }
-
- /*
- * Advance rindex. If the journal stream is not full duplex we also
- * advance xindex, otherwise the rjournal thread is responsible for
- * advancing xindex.
- */
- if ((jo->flags & MC_JOURNAL_WANT_FULLDUPLEX) == 0) {
- jo->fifo.xindex += bytes;
- jo->total_acked += bytes;
- }
- KKASSERT(jo->fifo.windex - jo->fifo.rindex >= 0);
- if ((jo->flags & MC_JOURNAL_WANT_FULLDUPLEX) == 0) {
- if (jo->flags & MC_JOURNAL_WWAIT) {
- jo->flags &= ~MC_JOURNAL_WWAIT; /* XXX hysteresis */
- wakeup(&jo->fifo.windex);
- }
- }
- }
- fp_shutdown(jo->fp, SHUT_WR);
- jo->flags &= ~MC_JOURNAL_WACTIVE;
- wakeup(jo);
- wakeup(&jo->fifo.windex);
-}
-
-/*
- * A second per-journal worker thread is created for two-way journaling
- * streams to deal with the return acknowledgement stream.
- */
-static void
-journal_rthread(void *info)
-{
- struct journal_rawrecbeg *rawp;
- struct journal_ackrecord ack;
- struct journal *jo = info;
- int64_t transid;
- int error;
- int count;
- int bytes;
-
- transid = 0;
- error = 0;
-
- for (;;) {
- /*
- * We have been asked to stop
- */
- if (jo->flags & MC_JOURNAL_STOP_REQ)
- break;
-
- /*
- * If we have no active transaction id, get one from the return
- * stream.
- */
- if (transid == 0) {
- error = fp_read(jo->fp, &ack, sizeof(ack), &count, 1);
-#if 0
- printf("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);
- break;
- }
- if (ack.rbeg.begmagic != JREC_BEGMAGIC ||
- ack.rend.endmagic != JREC_ENDMAGIC
- ) {
- printf("bad begmagic or endmagic on receive stream\n");
- break;
- }
- transid = ack.rbeg.transid;
- }
-
- /*
- * Calculate the number of unacknowledged bytes. If there are no
- * unacknowledged bytes then unsent data was acknowledged, report,
- * sleep a bit, and loop in that case. This should not happen
- * normally. The ack record is thrown away.
- */
- bytes = jo->fifo.rindex - jo->fifo.xindex;
-
- if (bytes == 0) {
- printf("warning: unsent data acknowledged transid %08llx\n", transid);
- tsleep(&jo->fifo.xindex, 0, "jrseq", hz);
- transid = 0;
- continue;
- }
-
- /*
- * Since rindex has advanced, the record pointed to by xindex
- * must be a valid record.
- */
- rawp = (void *)(jo->fifo.membase + (jo->fifo.xindex & jo->fifo.mask));
- KKASSERT(rawp->begmagic == JREC_BEGMAGIC);
- KKASSERT(rawp->recsize <= bytes);
-
- /*
- * The target can acknowledge several records at once.
- */
- if (rawp->transid < transid) {
-#if 1
- printf("ackskip %08llx/%08llx\n", rawp->transid, transid);
-#endif
- jo->fifo.xindex += (rawp->recsize + 15) & ~15;
- jo->total_acked += (rawp->recsize + 15) & ~15;
- if (jo->flags & MC_JOURNAL_WWAIT) {
- jo->flags &= ~MC_JOURNAL_WWAIT; /* XXX hysteresis */
- wakeup(&jo->fifo.windex);
- }
- continue;
- }
- if (rawp->transid == transid) {
-#if 1
- printf("ackskip %08llx/%08llx\n", rawp->transid, transid);
-#endif
- jo->fifo.xindex += (rawp->recsize + 15) & ~15;
- jo->total_acked += (rawp->recsize + 15) & ~15;
- if (jo->flags & MC_JOURNAL_WWAIT) {
- jo->flags &= ~MC_JOURNAL_WWAIT; /* XXX hysteresis */
- wakeup(&jo->fifo.windex);
- }
- transid = 0;
- continue;
- }
- printf("warning: unsent data(2) acknowledged transid %08llx\n", transid);
- transid = 0;
- }
- jo->flags &= ~MC_JOURNAL_RACTIVE;
- wakeup(jo);
- wakeup(&jo->fifo.windex);
-}
-
-/*
- * This builds a pad record which the journaling thread will skip over. Pad
- * records are required when we are unable to reserve sufficient stream space
- * due to insufficient space at the end of the physical memory fifo.
- *
- * Even though the record is not transmitted, a normal transid must be
- * assigned to it so link recovery operations after a failure work properly.
- */
-static
-void
-journal_build_pad(struct journal_rawrecbeg *rawp, int recsize, int64_t transid)
-{
- struct journal_rawrecend *rendp;
-
- KKASSERT((recsize & 15) == 0 && recsize >= 16);
-
- rawp->streamid = JREC_STREAMID_PAD;
- rawp->recsize = recsize; /* must be 16-byte aligned */
- rawp->transid = transid;
- /*
- * WARNING, rendp may overlap rawp->transid. This is necessary to
- * allow PAD records to fit in 16 bytes. Use cpu_ccfence() to
- * hopefully cause the compiler to not make any assumptions.
- */
- rendp = (void *)((char *)rawp + rawp->recsize - sizeof(*rendp));
- rendp->endmagic = JREC_ENDMAGIC;
- rendp->check = 0;
- rendp->recsize = rawp->recsize;
-
- /*
- * Set the begin magic last. This is what will allow the journal
- * thread to write the record out. Use a store fence to prevent
- * compiler and cpu reordering of the writes.
- */
- cpu_sfence();
- rawp->begmagic = JREC_BEGMAGIC;
-}
-
-/*
- * Wake up the worker thread if the FIFO is more then half full or if
- * someone is waiting for space to be freed up. Otherwise let the
- * heartbeat deal with it. Being able to avoid waking up the worker
- * is the key to the journal's cpu performance.
- */
-static __inline
-void
-journal_commit_wakeup(struct journal *jo)
-{
- int avail;
-
- avail = jo->fifo.size - (jo->fifo.windex - jo->fifo.xindex);
- KKASSERT(avail >= 0);
- if ((avail < (jo->fifo.size >> 1)) || (jo->flags & MC_JOURNAL_WWAIT))
- wakeup(&jo->fifo);
-}
-
-/*
- * Create a new BEGIN stream record with the specified streamid and the
- * specified amount of payload space. *rawpp will be set to point to the
- * base of the new stream record and a pointer to the base of the payload
- * space will be returned. *rawpp does not need to be pre-NULLd prior to
- * making this call. The raw record header will be partially initialized.
- *
- * A stream can be extended, aborted, or committed by other API calls
- * below. This may result in a sequence of potentially disconnected
- * stream records to be output to the journaling target. The first record
- * (the one created by this function) will be marked JREC_STREAMCTL_BEGIN,
- * while the last record on commit or abort will be marked JREC_STREAMCTL_END
- * (and possibly also JREC_STREAMCTL_ABORTED). The last record could wind
- * up being the same as the first, in which case the bits are all set in
- * the first record.
- *
- * The stream record is created in an incomplete state by setting the begin
- * magic to JREC_INCOMPLETEMAGIC. This prevents the worker thread from
- * flushing the fifo past our record until we have finished populating it.
- * Other threads can reserve and operate on their own space without stalling
- * but the stream output will stall until we have completed operations. The
- * memory FIFO is intended to be large enough to absorb such situations
- * without stalling out other threads.
- */
-static
-void *
-journal_reserve(struct journal *jo, struct journal_rawrecbeg **rawpp,
- int16_t streamid, int bytes)
-{
- struct journal_rawrecbeg *rawp;
- int avail;
- int availtoend;
- int req;
-
- /*
- * Add header and trailer overheads to the passed payload. Note that
- * the passed payload size need not be aligned in any way.
- */
- bytes += sizeof(struct journal_rawrecbeg);
- bytes += sizeof(struct journal_rawrecend);
-
- for (;;) {
- /*
- * First, check boundary conditions. If the request would wrap around
- * we have to skip past the ending block and return to the beginning
- * of the FIFO's buffer. Calculate 'req' which is the actual number
- * of bytes being reserved, including wrap-around dead space.
- *
- * Neither 'bytes' or 'req' are aligned.
- *
- * Note that availtoend is not truncated to avail and so cannot be
- * used to determine whether the reservation is possible by itself.
- * Also, since all fifo ops are 16-byte aligned, we can check
- * the size before calculating the aligned size.
- */
- availtoend = jo->fifo.size - (jo->fifo.windex & jo->fifo.mask);
- KKASSERT((availtoend & 15) == 0);
- if (bytes > availtoend)
- req = bytes + availtoend; /* add pad to end */
- else
- req = bytes;
-
- /*
- * Next calculate the total available space and see if it is
- * sufficient. We cannot overwrite previously buffered data
- * past xindex because otherwise we would not be able to restart
- * a broken link at the target's last point of commit.
- */
- avail = jo->fifo.size - (jo->fifo.windex - jo->fifo.xindex);
- KKASSERT(avail >= 0 && (avail & 15) == 0);
-
- if (avail < req) {
- /* XXX MC_JOURNAL_STOP_IMM */
- jo->flags |= MC_JOURNAL_WWAIT;
- ++jo->fifostalls;
- tsleep(&jo->fifo.windex, 0, "jwrite", 0);
- continue;
- }
-
- /*
- * Create a pad record for any dead space and create an incomplete
- * record for the live space, then return a pointer to the
- * contiguous buffer space that was requested.
- *
- * NOTE: The worker thread will not flush past an incomplete
- * record, so the reserved space can be filled in at-will. The
- * journaling code must also be aware the reserved sections occuring
- * after this one will also not be written out even if completed
- * until this one is completed.
- *
- * The transaction id must accomodate real and potential pad creation.
- */
- rawp = (void *)(jo->fifo.membase + (jo->fifo.windex & jo->fifo.mask));
- if (req != bytes) {
- journal_build_pad(rawp, availtoend, jo->transid);
- ++jo->transid;
- rawp = (void *)jo->fifo.membase;
- }
- rawp->begmagic = JREC_INCOMPLETEMAGIC; /* updated by abort/commit */
- rawp->recsize = bytes; /* (unaligned size) */
- rawp->streamid = streamid | JREC_STREAMCTL_BEGIN;
- rawp->transid = jo->transid;
- jo->transid += 2;
-
- /*
- * Issue a memory barrier to guarentee that the record data has been
- * properly initialized before we advance the write index and return
- * a pointer to the reserved record. Otherwise the worker thread
- * could accidently run past us.
- *
- * Note that stream records are always 16-byte aligned.
- */
- cpu_sfence();
- jo->fifo.windex += (req + 15) & ~15;
- *rawpp = rawp;
- return(rawp + 1);
- }
- /* not reached */
- *rawpp = NULL;
- return(NULL);
-}
-
-/*
- * Attempt to extend the stream record by <bytes> worth of payload space.
- *
- * If it is possible to extend the existing stream record no truncation
- * occurs and the record is extended as specified. A pointer to the
- * truncation offset within the payload space is returned.
- *
- * If it is not possible to do this the existing stream record is truncated
- * and committed, and a new stream record of size <bytes> is created. A
- * pointer to the base of the new stream record's payload space is returned.
- *
- * *rawpp is set to the new reservation in the case of a new record but
- * the caller cannot depend on a comparison with the old rawp to determine if
- * this case occurs because we could end up using the same memory FIFO
- * offset for the new stream record. Use *newstreamrecp instead.
- */
-static void *
-journal_extend(struct journal *jo, struct journal_rawrecbeg **rawpp,
- int truncbytes, int bytes, int *newstreamrecp)
-{
- struct journal_rawrecbeg *rawp;
- int16_t streamid;
- int availtoend;
- int avail;
- int osize;
- int nsize;
- int wbase;
- void *rptr;
-
- *newstreamrecp = 0;
- rawp = *rawpp;
- osize = (rawp->recsize + 15) & ~15;
- nsize = (rawp->recsize + bytes + 15) & ~15;
- wbase = (char *)rawp - jo->fifo.membase;
-
- /*
- * If the aligned record size does not change we can trivially adjust
- * the record size.
- */
- if (nsize == osize) {
- rawp->recsize += bytes;
- return((char *)(rawp + 1) + truncbytes);
- }
-
- /*
- * If the fifo's write index hasn't been modified since we made the
- * reservation and we do not hit any boundary conditions, we can
- * trivially make the record smaller or larger.
- */
- if ((jo->fifo.windex & jo->fifo.mask) == wbase + osize) {
- availtoend = jo->fifo.size - wbase;
- avail = jo->fifo.size - (jo->fifo.windex - jo->fifo.xindex) + osize;
- KKASSERT((availtoend & 15) == 0);
- KKASSERT((avail & 15) == 0);
- if (nsize <= avail && nsize <= availtoend) {
- jo->fifo.windex += nsize - osize;
- rawp->recsize += bytes;
- return((char *)(rawp + 1) + truncbytes);
- }
- }
-
- /*
- * It was not possible to extend the buffer. Commit the current
- * buffer and create a new one. We manually clear the BEGIN mark that
- * journal_reserve() creates (because this is a continuing record, not
- * the start of a new stream).
- */
- streamid = rawp->streamid & JREC_STREAMID_MASK;
- journal_commit(jo, rawpp, truncbytes, 0);
- rptr = journal_reserve(jo, rawpp, streamid, bytes);
- rawp = *rawpp;
- rawp->streamid &= ~JREC_STREAMCTL_BEGIN;
- *newstreamrecp = 1;
- return(rptr);
-}
-
-/*
- * Abort a journal record. If the transaction record represents a stream
- * BEGIN and we can reverse the fifo's write index we can simply reverse
- * index the entire record, as if it were never reserved in the first place.
- *
- * Otherwise we set the JREC_STREAMCTL_ABORTED bit and commit the record
- * with the payload truncated to 0 bytes.
- */
-static void
-journal_abort(struct journal *jo, struct journal_rawrecbeg **rawpp)
-{
- struct journal_rawrecbeg *rawp;
- int osize;
-
- rawp = *rawpp;
- osize = (rawp->recsize + 15) & ~15;
-
- if ((rawp->streamid & JREC_STREAMCTL_BEGIN) &&
- (jo->fifo.windex & jo->fifo.mask) ==
- (char *)rawp - jo->fifo.membase + osize)
- {
- jo->fifo.windex -= osize;
- *rawpp = NULL;
- } else {
- rawp->streamid |= JREC_STREAMCTL_ABORTED;
- journal_commit(jo, rawpp, 0, 1);
- }
-}
-
-/*
- * Commit a journal record and potentially truncate it to the specified
- * number of payload bytes. If you do not want to truncate the record,
- * simply pass -1 for the bytes parameter. Do not pass rawp->recsize, that
- * field includes header and trailer and will not be correct. Note that
- * passing 0 will truncate the entire data payload of the record.
- *
- * The logical stream is terminated by this function.
- *
- * If truncation occurs, and it is not possible to physically optimize the
- * memory FIFO due to other threads having reserved space after ours,
- * the remaining reserved space will be covered by a pad record.
- */
-static void
-journal_commit(struct journal *jo, struct journal_rawrecbeg **rawpp,
- int bytes, int closeout)
-{
- struct journal_rawrecbeg *rawp;
- struct journal_rawrecend *rendp;
- int osize;
- int nsize;
-
- rawp = *rawpp;
- *rawpp = NULL;
-
- KKASSERT((char *)rawp >= jo->fifo.membase &&
- (char *)rawp + rawp->recsize <= jo->fifo.membase + jo->fifo.size);
- KKASSERT(((intptr_t)rawp & 15) == 0);
-
- /*
- * Truncate the record if necessary. If the FIFO write index as still
- * at the end of our record we can optimally backindex it. Otherwise
- * we have to insert a pad record to cover the dead space.
- *
- * We calculate osize which is the 16-byte-aligned original recsize.
- * We calculate nsize which is the 16-byte-aligned new recsize.
- *
- * Due to alignment issues or in case the passed truncation bytes is
- * the same as the original payload, nsize may be equal to osize even
- * if the committed bytes is less then the originally reserved bytes.
- */
- if (bytes >= 0) {
- KKASSERT(bytes >= 0 && bytes <= rawp->recsize - sizeof(struct journal_rawrecbeg) - sizeof(struct journal_rawrecend));
- osize = (rawp->recsize + 15) & ~15;
- rawp->recsize = bytes + sizeof(struct journal_rawrecbeg) +
- sizeof(struct journal_rawrecend);
- nsize = (rawp->recsize + 15) & ~15;
- KKASSERT(nsize <= osize);
- if (osize == nsize) {
- /* do nothing */
- } else if ((jo->fifo.windex & jo->fifo.mask) == (char *)rawp - jo->fifo.membase + osize) {
- /* we are able to backindex the fifo */
- jo->fifo.windex -= osize - nsize;
- } else {
- /* we cannot backindex the fifo, emplace a pad in the dead space */
- journal_build_pad((void *)((char *)rawp + nsize), osize - nsize,
- rawp->transid + 1);
- }
- }
-
- /*
- * Fill in the trailer. Note that unlike pad records, the trailer will
- * never overlap the header.
- */
- rendp = (void *)((char *)rawp +
- ((rawp->recsize + 15) & ~15) - sizeof(*rendp));
- rendp->endmagic = JREC_ENDMAGIC;
- rendp->recsize = rawp->recsize;
- rendp->check = 0; /* XXX check word, disabled for now */
-
- /*
- * Fill in begmagic last. This will allow the worker thread to proceed.
- * Use a memory barrier to guarentee write ordering. Mark the stream
- * as terminated if closeout is set. This is the typical case.
- */
- if (closeout)
- rawp->streamid |= JREC_STREAMCTL_END;
- cpu_sfence(); /* memory and compiler barrier */
- rawp->begmagic = JREC_BEGMAGIC;
-
- journal_commit_wakeup(jo);
-}
-
/************************************************************************
* PARALLEL TRANSACTION SUPPORT ROUTINES *
************************************************************************
}
/************************************************************************
- * TRANSACTION SUPPORT ROUTINES *
- ************************************************************************
- *
- * JRECORD_*() - routines to create subrecord transactions and embed them
- * in the logical streams managed by the journal_*() routines.
- */
-
-/*
- * 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
-jrecord_init(struct journal *jo, struct jrecord *jrec, int16_t streamid)
-{
- bzero(jrec, sizeof(*jrec));
- jrec->jo = jo;
- jrec->streamid = streamid;
- jrec->stream_residual = JREC_DEFAULTSIZE;
- jrec->stream_reserved = jrec->stream_residual;
- jrec->stream_ptr =
- journal_reserve(jo, &jrec->rawp, streamid, jrec->stream_reserved);
-}
-
-/*
- * Push a recursive record type. All pushes should have matching pops.
- * The old parent is returned and the newly pushed record becomes the
- * new parent. Note that the old parent's pointer may already be invalid
- * or may become invalid if jrecord_write() had to build a new stream
- * 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)
-{
- struct journal_subrecord *save;
-
- save = jrec->parent;
- jrec->parent = jrecord_write(jrec, rectype|JMASK_NESTED, 0);
- jrec->last = NULL;
- KKASSERT(jrec->parent != NULL);
- ++jrec->pushcount;
- ++jrec->pushptrgood; /* cleared on flush */
- return(save);
-}
-
-/*
- * Pop a previously pushed sub-transaction. We must set JMASK_LAST
- * on the last record written within the subtransaction. If the last
- * record written is not accessible or if the subtransaction is empty,
- * we must write out a pad record with JMASK_LAST set before popping.
- *
- * When popping a subtransaction the parent record's recsize field
- * will be properly set. If the parent pointer is no longer valid
- * (which can occur if the data has already been flushed out to the
- * stream), the protocol spec allows us to leave it 0.
- *
- * The saved parent pointer which we restore may or may not be valid,
- * and if not valid may or may not be NULL, depending on the value
- * of pushptrgood.
- */
-static void
-jrecord_pop(struct jrecord *jrec, struct journal_subrecord *save)
-{
- struct journal_subrecord *last;
-
- KKASSERT(jrec->pushcount > 0);
- KKASSERT(jrec->residual == 0);
-
- /*
- * Set JMASK_LAST on the last record we wrote at the current
- * level. If last is NULL we either no longer have access to the
- * record or the subtransaction was empty and we must write out a pad
- * record.
- */
- if ((last = jrec->last) == NULL) {
- jrecord_write(jrec, JLEAF_PAD|JMASK_LAST, 0);
- last = jrec->last; /* reload after possible flush */
- } else {
- last->rectype |= JMASK_LAST;
- }
-
- /*
- * pushptrgood tells us how many levels of parent record pointers
- * are valid. The jrec only stores the current parent record pointer
- * (and it is only valid if pushptrgood != 0). The higher level parent
- * record pointers are saved by the routines calling jrecord_push() and
- * jrecord_pop(). These pointers may become stale and we determine
- * that fact by tracking the count of valid parent pointers with
- * pushptrgood. Pointers become invalid when their related stream
- * record gets pushed out.
- *
- * If no pointer is available (the data has already been pushed out),
- * then no fixup of e.g. the length field is possible for non-leaf
- * nodes. The protocol allows for this situation by placing a larger
- * burden on the program scanning the stream on the other end.
- *
- * [parentA]
- * [node X]
- * [parentB]
- * [node Y]
- * [node Z]
- * (pop B) see NOTE B
- * (pop A) see NOTE A
- *
- * NOTE B: This pop sets LAST in node Z if the node is still accessible,
- * else a PAD record is appended and LAST is set in that.
- *
- * This pop sets the record size in parentB if parentB is still
- * accessible, else the record size is left 0 (the scanner must
- * deal with that).
- *
- * This pop sets the new 'last' record to parentB, the pointer
- * to which may or may not still be accessible.
- *
- * NOTE A: This pop sets LAST in parentB if the node is still accessible,
- * else a PAD record is appended and LAST is set in that.
- *
- * This pop sets the record size in parentA if parentA is still
- * accessible, else the record size is left 0 (the scanner must
- * deal with that).
- *
- * This pop sets the new 'last' record to parentA, the pointer
- * to which may or may not still be accessible.
- *
- * Also note that the last record in the stream transaction, which in
- * the above example is parentA, does not currently have the LAST bit
- * set.
- *
- * The current parent becomes the last record relative to the
- * saved parent passed into us. It's validity is based on
- * whether pushptrgood is non-zero prior to decrementing. The saved
- * parent becomes the new parent, and its validity is based on whether
- * pushptrgood is non-zero after decrementing.
- *
- * The old jrec->parent may be NULL if it is no longer accessible.
- * If pushptrgood is non-zero, however, it is guarenteed to not
- * be NULL (since no flush occured).
- */
- jrec->last = jrec->parent;
- --jrec->pushcount;
- if (jrec->pushptrgood) {
- KKASSERT(jrec->last != NULL && last != NULL);
- if (--jrec->pushptrgood == 0) {
- jrec->parent = NULL; /* 'save' contains garbage or NULL */
- } else {
- KKASSERT(save != NULL);
- jrec->parent = save; /* 'save' must not be NULL */
- }
-
- /*
- * Set the record size in the old parent. 'last' still points to
- * the original last record in the subtransaction being popped,
- * jrec->last points to the old parent (which became the last
- * record relative to the new parent being popped into).
- */
- jrec->last->recsize = (char *)last + last->recsize - (char *)jrec->last;
- } else {
- jrec->parent = NULL;
- KKASSERT(jrec->last == NULL);
- }
-}
-
-/*
- * 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);
-}
-
-/*
- * Write a leaf record out and return a pointer to its base. The leaf
- * record may contain potentially megabytes of data which is supplied
- * in jrecord_data() calls. The exact amount must be specified in this
- * call.
- *
- * THE RETURNED SUBRECORD POINTER IS ONLY VALID IMMEDIATELY AFTER THE
- * 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)
-{
- struct journal_subrecord *last;
- int pusheditout;
-
- /*
- * Try to catch some obvious errors. Nesting records must specify a
- * size of 0, and there should be no left-overs from previous operations
- * (such as incomplete data writeouts).
- */
- KKASSERT(bytes == 0 || (rectype & JMASK_NESTED) == 0);
- KKASSERT(jrec->residual == 0);
-
- /*
- * Check to see if the current stream record has enough room for
- * the new subrecord header. If it doesn't we extend the current
- * stream record.
- *
- * This may have the side effect of pushing out the current stream record
- * and creating a new one. We must adjust our stream tracking fields
- * accordingly.
- */
- if (jrec->stream_residual < sizeof(struct journal_subrecord)) {
- jrec->stream_ptr = journal_extend(jrec->jo, &jrec->rawp,
- jrec->stream_reserved - jrec->stream_residual,
- JREC_DEFAULTSIZE, &pusheditout);
- if (pusheditout) {
- /*
- * If a pushout occured, the pushed out stream record was
- * truncated as specified and the new record is exactly the
- * extension size specified.
- */
- jrec->stream_reserved = JREC_DEFAULTSIZE;
- jrec->stream_residual = JREC_DEFAULTSIZE;
- jrec->parent = NULL; /* no longer accessible */
- jrec->pushptrgood = 0; /* restored parents in pops no good */
- } else {
- /*
- * If no pushout occured the stream record is NOT truncated and
- * IS extended.
- */
- jrec->stream_reserved += JREC_DEFAULTSIZE;
- jrec->stream_residual += JREC_DEFAULTSIZE;
- }
- }
- last = (void *)jrec->stream_ptr;
- last->rectype = rectype;
- last->reserved = 0;
-
- /*
- * We may not know the record size for recursive records and the
- * header may become unavailable due to limited FIFO space. Write
- * -1 to indicate this special case.
- */
- if ((rectype & JMASK_NESTED) && bytes == 0)
- last->recsize = -1;
- else
- last->recsize = sizeof(struct journal_subrecord) + bytes;
- jrec->last = last;
- jrec->residual = bytes; /* remaining data to be posted */
- jrec->residual_align = -bytes & 7; /* post-data alignment required */
- jrec->stream_ptr += sizeof(*last); /* current write pointer */
- jrec->stream_residual -= sizeof(*last); /* space remaining in stream */
- return(last);
-}
-
-/*
- * Write out the data associated with a leaf record. Any number of calls
- * to this routine may be made as long as the byte count adds up to the
- * amount originally specified in jrecord_write().
- *
- * The act of writing out the leaf data may result in numerous stream records
- * being pushed out. Callers should be aware that even the associated
- * subrecord header may become inaccessible due to stream record pushouts.
- */
-static void
-jrecord_data(struct jrecord *jrec, const void *buf, int bytes)
-{
- int pusheditout;
- int extsize;
-
- KKASSERT(bytes >= 0 && bytes <= jrec->residual);
-
- /*
- * Push out stream records as long as there is insufficient room to hold
- * the remaining data.
- */
- while (jrec->stream_residual < 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;
- bytes -= jrec->stream_residual;
- /*jrec->stream_ptr += jrec->stream_residual;*/
- jrec->residual -= jrec->stream_residual;
- jrec->stream_residual = 0;
-
- /*
- * Try to extend the current stream record, but no more then 1/4
- * the size of the FIFO.
- */
- extsize = jrec->jo->fifo.size >> 2;
- if (extsize > bytes)
- extsize = (bytes + 15) & ~15;
-
- jrec->stream_ptr = journal_extend(jrec->jo, &jrec->rawp,
- jrec->stream_reserved - jrec->stream_residual,
- extsize, &pusheditout);
- if (pusheditout) {
- jrec->stream_reserved = extsize;
- jrec->stream_residual = extsize;
- jrec->parent = NULL; /* no longer accessible */
- jrec->last = NULL; /* no longer accessible */
- jrec->pushptrgood = 0; /* restored parents in pops no good */
- } else {
- jrec->stream_reserved += extsize;
- jrec->stream_residual += extsize;
- }
- }
-
- /*
- * Push out any remaining bytes into the current stream record.
- */
- if (bytes) {
- bcopy(buf, jrec->stream_ptr, bytes);
- jrec->stream_ptr += bytes;
- jrec->stream_residual -= bytes;
- jrec->residual -= bytes;
- }
-
- /*
- * Handle data alignment requirements for the subrecord. Because the
- * stream record's data space is more strictly aligned, it must already
- * have sufficient space to hold any subrecord alignment slop.
- */
- if (jrec->residual == 0 && jrec->residual_align) {
- KKASSERT(jrec->residual_align <= jrec->stream_residual);
- bzero(jrec->stream_ptr, jrec->residual_align);
- jrec->stream_ptr += jrec->residual_align;
- jrec->stream_residual -= jrec->residual_align;
- jrec->residual_align = 0;
- }
-}
-
-/*
- * We are finished with the transaction. This closes the transaction created
- * by jrecord_init().
- *
- * NOTE: If abortit is not set then we must be at the top level with no
- * residual subrecord data left to output.
- *
- * If abortit is set then we can be in any state, all pushes will be
- * popped and it is ok for there to be residual data. This works
- * because the virtual stream itself is truncated. Scanners must deal
- * with this situation.
- *
- * The stream record will be committed or aborted as specified and jrecord
- * resources will be cleaned up.
- */
-static void
-jrecord_done(struct jrecord *jrec, int abortit)
-{
- KKASSERT(jrec->rawp != NULL);
-
- if (abortit) {
- journal_abort(jrec->jo, &jrec->rawp);
- } else {
- KKASSERT(jrec->pushcount == 0 && jrec->residual == 0);
- journal_commit(jrec->jo, &jrec->rawp,
- jrec->stream_reserved - jrec->stream_residual, 1);
- }
-
- /*
- * jrec should not be used beyond this point without another init,
- * but clean up some fields to ensure that we panic if it is.
- *
- * Note that jrec->rawp is NULLd out by journal_abort/journal_commit.
- */
- jrec->jo = NULL;
- jrec->stream_ptr = NULL;
-}
-
-/************************************************************************
- * LOW LEVEL RECORD SUPPORT ROUTINES *
- ************************************************************************
- *
- * These routine create low level recursive and leaf subrecords representing
- * common filesystem structures.
- */
-
-/*
- * Write out a filename path relative to the base of the mount point.
- * rectype is typically JLEAF_PATH{1,2,3,4}.
- */
-static void
-jrecord_write_path(struct jrecord *jrec, int16_t rectype, struct namecache *ncp)
-{
- char buf[64]; /* local buffer if it fits, else malloced */
- char *base;
- int pathlen;
- int index;
- struct namecache *scan;
-
- /*
- * Pass 1 - figure out the number of bytes required. Include terminating
- * \0 on last element and '/' separator on other elements.
- */
-again:
- pathlen = 0;
- for (scan = ncp;
- scan && (scan->nc_flag & NCF_MOUNTPT) == 0;
- scan = scan->nc_parent
- ) {
- pathlen += scan->nc_nlen + 1;
- }
-
- if (pathlen <= sizeof(buf))
- base = buf;
- else
- base = malloc(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
- ) {
- if (scan->nc_nlen >= index) {
- if (base != buf)
- free(base, M_TEMP);
- goto again;
- }
- if (index == pathlen)
- base[--index] = 0;
- else
- base[--index] = '/';
- index -= scan->nc_nlen;
- bcopy(scan->nc_name, base + index, scan->nc_nlen);
- }
- jrecord_leaf(jrec, rectype, base + index, pathlen - index);
- if (base != buf)
- free(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
-jrecord_write_vattr(struct jrecord *jrec, struct vattr *vat)
-{
- void *save;
-
- save = jrecord_push(jrec, JTYPE_VATTR);
- if (vat->va_type != VNON)
- jrecord_leaf(jrec, JLEAF_VTYPE, &vat->va_type, sizeof(vat->va_type));
- if (vat->va_mode != (mode_t)VNOVAL)
- jrecord_leaf(jrec, JLEAF_MODES, &vat->va_mode, sizeof(vat->va_mode));
- if (vat->va_nlink != VNOVAL)
- jrecord_leaf(jrec, JLEAF_NLINK, &vat->va_nlink, sizeof(vat->va_nlink));
- if (vat->va_uid != VNOVAL)
- jrecord_leaf(jrec, JLEAF_UID, &vat->va_uid, sizeof(vat->va_uid));
- if (vat->va_gid != VNOVAL)
- jrecord_leaf(jrec, JLEAF_GID, &vat->va_gid, sizeof(vat->va_gid));
- if (vat->va_fsid != VNOVAL)
- jrecord_leaf(jrec, JLEAF_FSID, &vat->va_fsid, sizeof(vat->va_fsid));
- if (vat->va_fileid != VNOVAL)
- jrecord_leaf(jrec, JLEAF_INUM, &vat->va_fileid, sizeof(vat->va_fileid));
- if (vat->va_size != VNOVAL)
- jrecord_leaf(jrec, JLEAF_SIZE, &vat->va_size, sizeof(vat->va_size));
- if (vat->va_atime.tv_sec != VNOVAL)
- jrecord_leaf(jrec, JLEAF_ATIME, &vat->va_atime, sizeof(vat->va_atime));
- if (vat->va_mtime.tv_sec != VNOVAL)
- jrecord_leaf(jrec, JLEAF_MTIME, &vat->va_mtime, sizeof(vat->va_mtime));
- if (vat->va_ctime.tv_sec != VNOVAL)
- jrecord_leaf(jrec, JLEAF_CTIME, &vat->va_ctime, sizeof(vat->va_ctime));
- if (vat->va_gen != VNOVAL)
- 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 0
- if (vat->va_filerev != VNOVAL)
- jrecord_leaf(jrec, JLEAF_FILEREV, &vat->va_filerev, sizeof(vat->va_filerev));
-#endif
- jrecord_pop(jrec, save);
-}
-
-/*
- * Write out the creds used to issue a file operation. If a process is
- * available write out additional tracking information related to the
- * process.
- *
- * XXX additional tracking info
- * XXX tty line info
- */
-static void
-jrecord_write_cred(struct jrecord *jrec, struct thread *td, struct ucred *cred)
-{
- void *save;
- struct proc *p;
-
- save = jrecord_push(jrec, JTYPE_CRED);
- jrecord_leaf(jrec, JLEAF_UID, &cred->cr_uid, sizeof(cred->cr_uid));
- jrecord_leaf(jrec, JLEAF_GID, &cred->cr_gid, sizeof(cred->cr_gid));
- if (td && (p = td->td_proc) != NULL) {
- jrecord_leaf(jrec, JLEAF_PID, &p->p_pid, sizeof(p->p_pid));
- jrecord_leaf(jrec, JLEAF_COMM, p->p_comm, sizeof(p->p_comm));
- }
- jrecord_pop(jrec, save);
-}
-
-/*
- * Write out information required to identify a vnode
- *
- * XXX this needs work. We should write out the inode number as well,
- * and in fact avoid writing out the file path for seqential writes
- * occuring within e.g. a certain period of time.
- */
-static void
-jrecord_write_vnode_ref(struct jrecord *jrec, struct vnode *vp)
-{
- struct namecache *ncp;
-
- TAILQ_FOREACH(ncp, &vp->v_namecache, nc_vnode) {
- if ((ncp->nc_flag & (NCF_UNRESOLVED|NCF_DESTROYED)) == 0)
- break;
- }
- if (ncp)
- jrecord_write_path(jrec, JLEAF_PATH_REF, ncp);
-}
-
-static void
-jrecord_write_vnode_link(struct jrecord *jrec, struct vnode *vp,
- struct namecache *notncp)
-{
- struct namecache *ncp;
-
- TAILQ_FOREACH(ncp, &vp->v_namecache, nc_vnode) {
- if (ncp == notncp)
- continue;
- if ((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)
-{
-}
-#endif
-
-/*
- * Write out the data represented by a pagelist
- */
-static 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;
- int error;
- int b;
- int i;
-
- i = 0;
- while (i < pgcount) {
- /*
- * Find the next valid section. Skip any invalid elements
- */
- if (rtvals[i] != VM_PAGER_OK) {
- ++i;
- offset += PAGE_SIZE;
- continue;
- }
-
- /*
- * Figure out how big the valid section is, capping I/O at what the
- * MSFBUF can represent.
- */
- b = i;
- while (i < pgcount && i - b != XIO_INTERNAL_PAGES &&
- rtvals[i] == VM_PAGER_OK
- ) {
- ++i;
- }
-
- /*
- * And write it out.
- */
- if (i - b) {
- error = msf_map_pagelist(&msf, pglist + b, i - b, 0);
- 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);
- } else {
- printf("jrecord_write_pagelist: mapping failure\n");
- }
- offset += (off_t)(i - b) << PAGE_SHIFT;
- }
- }
-}
-
-/*
- * 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
-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);
- }
-}
-
-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
-jrecord_file_data(struct jrecord *jrec, struct vnode *vp,
- off_t off, off_t bytes)
-{
- const int bufsize = 8192;
- char *buf;
- int error;
- int n;
-
- buf = malloc(bufsize, M_JOURNAL, M_WAITOK);
- jrecord_leaf(jrec, JLEAF_SEEKPOS, &off, sizeof(off));
- while (bytes) {
- n = (bytes > bufsize) ? bufsize : (int)bytes;
- error = vn_rdwr(UIO_READ, vp, buf, n, off, UIO_SYSSPACE, IO_NODELOCKED,
- proc0.p_ucred, NULL);
- if (error) {
- jrecord_leaf(jrec, JLEAF_ERROR, &error, sizeof(error));
- break;
- }
- jrecord_leaf(jrec, JLEAF_FILEDATA, buf, n);
- bytes -= n;
- off += n;
- }
- free(buf, M_JOURNAL);
-}
-
-/************************************************************************
* LOW LEVEL UNDO SUPPORT ROUTINE *
************************************************************************
*
/*
- * 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 <dillon@backplane.com>
* 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 $
+ * $DragonFly: src/sys/kern/vfs_journal.c,v 1.27 2006/05/08 18:45:51 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
#include <sys/file2.h>
#include <sys/thread2.h>
-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);
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 }
-};
+ 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 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;
-}
+MALLOC_DEFINE(M_JOURNAL, "journal", "Journaling structures");
+MALLOC_DEFINE(M_JFIFO, "journal-fifo", "Journal FIFO");
-/*
- * 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;
-
- 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);
-}
-
-/*
- * 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);
}
}
-static void
+void
journal_destroy_threads(struct journal *jo, int flags)
{
int wcount;
}
/************************************************************************
- * 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 *
************************************************************************
*
* 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));
* 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)
{
* 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;
/*
* Write out a leaf record, including associated data.
*/
-static
void
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)
{
* being pushed out. Callers should be aware that even the associated
* subrecord header may become inaccessible due to stream record pushouts.
*/
-static void
+void
jrecord_data(struct jrecord *jrec, const void *buf, int bytes)
{
int pusheditout;
* 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);
* 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 */
* 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;
* 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;
* 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;
jrecord_write_path(jrec, JLEAF_PATH_REF, ncp);
}
-static void
+void
jrecord_write_vnode_link(struct jrecord *jrec, struct vnode *vp,
struct namecache *notncp)
{
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)
-{
-}
-#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)
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 };
return(0);
}
-static void
+void
jrecord_file_data(struct jrecord *jrec, struct vnode *vp,
off_t off, off_t bytes)
{
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);
-}
-
projects / dragonfly.git / commitdiff