kmem_zone_t *xfs_log_ticket_zone;
-#define xlog_write_adv_cnt(ptr, len, off, bytes) \
- { (ptr) += (bytes); \
- (len) -= (bytes); \
- (off) += (bytes);}
-
/* Local miscellaneous function prototypes */
-STATIC int xlog_commit_record(xfs_mount_t *mp, xlog_ticket_t *ticket,
+STATIC int xlog_commit_record(struct log *log, struct xlog_ticket *ticket,
xlog_in_core_t **, xfs_lsn_t *);
STATIC xlog_t * xlog_alloc_log(xfs_mount_t *mp,
xfs_buftarg_t *log_target,
STATIC int xlog_space_left(xlog_t *log, int cycle, int bytes);
STATIC int xlog_sync(xlog_t *log, xlog_in_core_t *iclog);
STATIC void xlog_dealloc_log(xlog_t *log);
-STATIC int xlog_write(xfs_mount_t *mp, xfs_log_iovec_t region[],
- int nentries, struct xlog_ticket *tic,
- xfs_lsn_t *start_lsn,
- xlog_in_core_t **commit_iclog,
- uint flags);
+STATIC int xlog_write(struct log *log, struct xfs_log_vec *log_vector,
+ struct xlog_ticket *tic, xfs_lsn_t *start_lsn,
+ xlog_in_core_t **commit_iclog, uint flags);
/* local state machine functions */
STATIC void xlog_state_done_syncing(xlog_in_core_t *iclog, int);
uint flags);
#if defined(DEBUG)
-STATIC void xlog_verify_dest_ptr(xlog_t *log, __psint_t ptr);
+STATIC void xlog_verify_dest_ptr(xlog_t *log, char *ptr);
STATIC void xlog_verify_grant_head(xlog_t *log, int equals);
STATIC void xlog_verify_iclog(xlog_t *log, xlog_in_core_t *iclog,
int count, boolean_t syncing);
* If we get an error, just continue and give back the log ticket.
*/
(((ticket->t_flags & XLOG_TIC_INITED) == 0) &&
- (xlog_commit_record(mp, ticket, iclog, &lsn)))) {
+ (xlog_commit_record(log, ticket, iclog, &lsn)))) {
lsn = (xfs_lsn_t) -1;
if (ticket->t_flags & XLOG_TIC_PERM_RESERV) {
flags |= XFS_LOG_REL_PERM_RESERV;
#ifdef DEBUG
xlog_in_core_t *first_iclog;
#endif
- xfs_log_iovec_t reg[1];
xlog_ticket_t *tic = NULL;
xfs_lsn_t lsn;
int error;
- /* the data section must be 32 bit size aligned */
- struct {
- __uint16_t magic;
- __uint16_t pad1;
- __uint32_t pad2; /* may as well make it 64 bits */
- } magic = { XLOG_UNMOUNT_TYPE, 0, 0 };
-
/*
* Don't write out unmount record on read-only mounts.
* Or, if we are doing a forced umount (typically because of IO errors).
} while (iclog != first_iclog);
#endif
if (! (XLOG_FORCED_SHUTDOWN(log))) {
- reg[0].i_addr = (void*)&magic;
- reg[0].i_len = sizeof(magic);
- reg[0].i_type = XLOG_REG_TYPE_UNMOUNT;
-
error = xfs_log_reserve(mp, 600, 1, &tic,
XFS_LOG, 0, XLOG_UNMOUNT_REC_TYPE);
if (!error) {
+ /* the data section must be 32 bit size aligned */
+ struct {
+ __uint16_t magic;
+ __uint16_t pad1;
+ __uint32_t pad2; /* may as well make it 64 bits */
+ } magic = {
+ .magic = XLOG_UNMOUNT_TYPE,
+ };
+ struct xfs_log_iovec reg = {
+ .i_addr = (void *)&magic,
+ .i_len = sizeof(magic),
+ .i_type = XLOG_REG_TYPE_UNMOUNT,
+ };
+ struct xfs_log_vec vec = {
+ .lv_niovecs = 1,
+ .lv_iovecp = ®,
+ };
+
/* remove inited flag */
- ((xlog_ticket_t *)tic)->t_flags = 0;
- error = xlog_write(mp, reg, 1, tic, &lsn,
+ tic->t_flags = 0;
+ error = xlog_write(log, &vec, tic, &lsn,
NULL, XLOG_UNMOUNT_TRANS);
/*
* At this point, we're umounting anyway,
xlog_dealloc_log(mp->m_log);
}
+void
+xfs_log_item_init(
+ struct xfs_mount *mp,
+ struct xfs_log_item *item,
+ int type,
+ struct xfs_item_ops *ops)
+{
+ item->li_mountp = mp;
+ item->li_ailp = mp->m_ail;
+ item->li_type = type;
+ item->li_ops = ops;
+}
+
/*
* Write region vectors to log. The write happens using the space reservation
* of the ticket (tic). It is not a requirement that all writes for a given
- * transaction occur with one call to xfs_log_write().
+ * transaction occur with one call to xfs_log_write(). However, it is important
+ * to note that the transaction reservation code makes an assumption about the
+ * number of log headers a transaction requires that may be violated if you
+ * don't pass all the transaction vectors in one call....
*/
int
xfs_log_write(
{
struct log *log = mp->m_log;
int error;
+ struct xfs_log_vec vec = {
+ .lv_niovecs = nentries,
+ .lv_iovecp = reg,
+ };
if (XLOG_FORCED_SHUTDOWN(log))
return XFS_ERROR(EIO);
- error = xlog_write(mp, reg, nentries, tic, start_lsn, NULL, 0);
+ error = xlog_write(log, &vec, tic, start_lsn, NULL, 0);
if (error)
xfs_force_shutdown(mp, SHUTDOWN_LOG_IO_ERROR);
return error;
int i;
int iclogsize;
int error = ENOMEM;
+ uint log2_size = 0;
log = kmem_zalloc(sizeof(xlog_t), KM_MAYFAIL);
if (!log) {
error = EFSCORRUPTED;
if (xfs_sb_version_hassector(&mp->m_sb)) {
- log->l_sectbb_log = mp->m_sb.sb_logsectlog - BBSHIFT;
- if (log->l_sectbb_log < 0 ||
- log->l_sectbb_log > mp->m_sectbb_log) {
- xlog_warn("XFS: Log sector size (0x%x) out of range.",
- log->l_sectbb_log);
+ log2_size = mp->m_sb.sb_logsectlog;
+ if (log2_size < BBSHIFT) {
+ xlog_warn("XFS: Log sector size too small "
+ "(0x%x < 0x%x)", log2_size, BBSHIFT);
goto out_free_log;
}
- /* for larger sector sizes, must have v2 or external log */
- if (log->l_sectbb_log != 0 &&
- (log->l_logBBstart != 0 &&
- !xfs_sb_version_haslogv2(&mp->m_sb))) {
- xlog_warn("XFS: log sector size (0x%x) invalid "
- "for configuration.", log->l_sectbb_log);
+ log2_size -= BBSHIFT;
+ if (log2_size > mp->m_sectbb_log) {
+ xlog_warn("XFS: Log sector size too large "
+ "(0x%x > 0x%x)", log2_size, mp->m_sectbb_log);
goto out_free_log;
}
- if (mp->m_sb.sb_logsectlog < BBSHIFT) {
- xlog_warn("XFS: Log sector log (0x%x) too small.",
- mp->m_sb.sb_logsectlog);
+
+ /* for larger sector sizes, must have v2 or external log */
+ if (log2_size && log->l_logBBstart > 0 &&
+ !xfs_sb_version_haslogv2(&mp->m_sb)) {
+
+ xlog_warn("XFS: log sector size (0x%x) invalid "
+ "for configuration.", log2_size);
goto out_free_log;
}
}
- log->l_sectbb_mask = (1 << log->l_sectbb_log) - 1;
+ log->l_sectBBsize = 1 << log2_size;
xlog_get_iclog_buffer_size(mp, log);
* ticket. Return the lsn of the commit record.
*/
STATIC int
-xlog_commit_record(xfs_mount_t *mp,
- xlog_ticket_t *ticket,
- xlog_in_core_t **iclog,
- xfs_lsn_t *commitlsnp)
+xlog_commit_record(
+ struct log *log,
+ struct xlog_ticket *ticket,
+ struct xlog_in_core **iclog,
+ xfs_lsn_t *commitlsnp)
{
- int error;
- xfs_log_iovec_t reg[1];
-
- reg[0].i_addr = NULL;
- reg[0].i_len = 0;
- reg[0].i_type = XLOG_REG_TYPE_COMMIT;
+ struct xfs_mount *mp = log->l_mp;
+ int error;
+ struct xfs_log_iovec reg = {
+ .i_addr = NULL,
+ .i_len = 0,
+ .i_type = XLOG_REG_TYPE_COMMIT,
+ };
+ struct xfs_log_vec vec = {
+ .lv_niovecs = 1,
+ .lv_iovecp = ®,
+ };
ASSERT_ALWAYS(iclog);
- if ((error = xlog_write(mp, reg, 1, ticket, commitlsnp,
- iclog, XLOG_COMMIT_TRANS))) {
+ error = xlog_write(log, &vec, ticket, commitlsnp, iclog,
+ XLOG_COMMIT_TRANS);
+ if (error)
xfs_force_shutdown(mp, SHUTDOWN_LOG_IO_ERROR);
- }
return error;
-} /* xlog_commit_record */
-
+}
/*
* Push on the buffer cache code if we ever use more than 75% of the on-disk
}
}
+/*
+ * Calculate the potential space needed by the log vector. Each region gets
+ * its own xlog_op_header_t and may need to be double word aligned.
+ */
+static int
+xlog_write_calc_vec_length(
+ struct xlog_ticket *ticket,
+ struct xfs_log_vec *log_vector)
+{
+ struct xfs_log_vec *lv;
+ int headers = 0;
+ int len = 0;
+ int i;
+
+ /* acct for start rec of xact */
+ if (ticket->t_flags & XLOG_TIC_INITED)
+ headers++;
+
+ for (lv = log_vector; lv; lv = lv->lv_next) {
+ headers += lv->lv_niovecs;
+
+ for (i = 0; i < lv->lv_niovecs; i++) {
+ struct xfs_log_iovec *vecp = &lv->lv_iovecp[i];
+
+ len += vecp->i_len;
+ xlog_tic_add_region(ticket, vecp->i_len, vecp->i_type);
+ }
+ }
+
+ ticket->t_res_num_ophdrs += headers;
+ len += headers * sizeof(struct xlog_op_header);
+
+ return len;
+}
+
+/*
+ * If first write for transaction, insert start record We can't be trying to
+ * commit if we are inited. We can't have any "partial_copy" if we are inited.
+ */
+static int
+xlog_write_start_rec(
+ struct xlog_op_header *ophdr,
+ struct xlog_ticket *ticket)
+{
+ if (!(ticket->t_flags & XLOG_TIC_INITED))
+ return 0;
+
+ ophdr->oh_tid = cpu_to_be32(ticket->t_tid);
+ ophdr->oh_clientid = ticket->t_clientid;
+ ophdr->oh_len = 0;
+ ophdr->oh_flags = XLOG_START_TRANS;
+ ophdr->oh_res2 = 0;
+
+ ticket->t_flags &= ~XLOG_TIC_INITED;
+
+ return sizeof(struct xlog_op_header);
+}
+
+static xlog_op_header_t *
+xlog_write_setup_ophdr(
+ struct log *log,
+ struct xlog_op_header *ophdr,
+ struct xlog_ticket *ticket,
+ uint flags)
+{
+ ophdr->oh_tid = cpu_to_be32(ticket->t_tid);
+ ophdr->oh_clientid = ticket->t_clientid;
+ ophdr->oh_res2 = 0;
+
+ /* are we copying a commit or unmount record? */
+ ophdr->oh_flags = flags;
+
+ /*
+ * We've seen logs corrupted with bad transaction client ids. This
+ * makes sure that XFS doesn't generate them on. Turn this into an EIO
+ * and shut down the filesystem.
+ */
+ switch (ophdr->oh_clientid) {
+ case XFS_TRANSACTION:
+ case XFS_VOLUME:
+ case XFS_LOG:
+ break;
+ default:
+ xfs_fs_cmn_err(CE_WARN, log->l_mp,
+ "Bad XFS transaction clientid 0x%x in ticket 0x%p",
+ ophdr->oh_clientid, ticket);
+ return NULL;
+ }
+
+ return ophdr;
+}
+
+/*
+ * Set up the parameters of the region copy into the log. This has
+ * to handle region write split across multiple log buffers - this
+ * state is kept external to this function so that this code can
+ * can be written in an obvious, self documenting manner.
+ */
+static int
+xlog_write_setup_copy(
+ struct xlog_ticket *ticket,
+ struct xlog_op_header *ophdr,
+ int space_available,
+ int space_required,
+ int *copy_off,
+ int *copy_len,
+ int *last_was_partial_copy,
+ int *bytes_consumed)
+{
+ int still_to_copy;
+
+ still_to_copy = space_required - *bytes_consumed;
+ *copy_off = *bytes_consumed;
+
+ if (still_to_copy <= space_available) {
+ /* write of region completes here */
+ *copy_len = still_to_copy;
+ ophdr->oh_len = cpu_to_be32(*copy_len);
+ if (*last_was_partial_copy)
+ ophdr->oh_flags |= (XLOG_END_TRANS|XLOG_WAS_CONT_TRANS);
+ *last_was_partial_copy = 0;
+ *bytes_consumed = 0;
+ return 0;
+ }
+
+ /* partial write of region, needs extra log op header reservation */
+ *copy_len = space_available;
+ ophdr->oh_len = cpu_to_be32(*copy_len);
+ ophdr->oh_flags |= XLOG_CONTINUE_TRANS;
+ if (*last_was_partial_copy)
+ ophdr->oh_flags |= XLOG_WAS_CONT_TRANS;
+ *bytes_consumed += *copy_len;
+ (*last_was_partial_copy)++;
+
+ /* account for new log op header */
+ ticket->t_curr_res -= sizeof(struct xlog_op_header);
+ ticket->t_res_num_ophdrs++;
+
+ return sizeof(struct xlog_op_header);
+}
+
+static int
+xlog_write_copy_finish(
+ struct log *log,
+ struct xlog_in_core *iclog,
+ uint flags,
+ int *record_cnt,
+ int *data_cnt,
+ int *partial_copy,
+ int *partial_copy_len,
+ int log_offset,
+ struct xlog_in_core **commit_iclog)
+{
+ if (*partial_copy) {
+ /*
+ * This iclog has already been marked WANT_SYNC by
+ * xlog_state_get_iclog_space.
+ */
+ xlog_state_finish_copy(log, iclog, *record_cnt, *data_cnt);
+ *record_cnt = 0;
+ *data_cnt = 0;
+ return xlog_state_release_iclog(log, iclog);
+ }
+
+ *partial_copy = 0;
+ *partial_copy_len = 0;
+
+ if (iclog->ic_size - log_offset <= sizeof(xlog_op_header_t)) {
+ /* no more space in this iclog - push it. */
+ xlog_state_finish_copy(log, iclog, *record_cnt, *data_cnt);
+ *record_cnt = 0;
+ *data_cnt = 0;
+
+ spin_lock(&log->l_icloglock);
+ xlog_state_want_sync(log, iclog);
+ spin_unlock(&log->l_icloglock);
+
+ if (!commit_iclog)
+ return xlog_state_release_iclog(log, iclog);
+ ASSERT(flags & XLOG_COMMIT_TRANS);
+ *commit_iclog = iclog;
+ }
+
+ return 0;
+}
+
/*
* Write some region out to in-core log
*
*/
STATIC int
xlog_write(
- struct xfs_mount *mp,
- struct xfs_log_iovec reg[],
- int nentries,
+ struct log *log,
+ struct xfs_log_vec *log_vector,
struct xlog_ticket *ticket,
xfs_lsn_t *start_lsn,
struct xlog_in_core **commit_iclog,
uint flags)
{
- xlog_t *log = mp->m_log;
- xlog_in_core_t *iclog = NULL; /* ptr to current in-core log */
- xlog_op_header_t *logop_head; /* ptr to log operation header */
- __psint_t ptr; /* copy address into data region */
- int len; /* # xlog_write() bytes 2 still copy */
- int index; /* region index currently copying */
- int log_offset; /* offset (from 0) into data region */
- int start_rec_copy; /* # bytes to copy for start record */
- int partial_copy; /* did we split a region? */
- int partial_copy_len;/* # bytes copied if split region */
- int need_copy; /* # bytes need to memcpy this region */
- int copy_len; /* # bytes actually memcpy'ing */
- int copy_off; /* # bytes from entry start */
- int contwr; /* continued write of in-core log? */
- int error;
- int record_cnt = 0, data_cnt = 0;
-
- partial_copy_len = partial_copy = 0;
-
- /* Calculate potential maximum space. Each region gets its own
- * xlog_op_header_t and may need to be double word aligned.
- */
- len = 0;
- if (ticket->t_flags & XLOG_TIC_INITED) { /* acct for start rec of xact */
- len += sizeof(xlog_op_header_t);
- ticket->t_res_num_ophdrs++;
- }
+ struct xlog_in_core *iclog = NULL;
+ struct xfs_log_iovec *vecp;
+ struct xfs_log_vec *lv;
+ int len;
+ int index;
+ int partial_copy = 0;
+ int partial_copy_len = 0;
+ int contwr = 0;
+ int record_cnt = 0;
+ int data_cnt = 0;
+ int error;
- for (index = 0; index < nentries; index++) {
- len += sizeof(xlog_op_header_t); /* each region gets >= 1 */
- ticket->t_res_num_ophdrs++;
- len += reg[index].i_len;
- xlog_tic_add_region(ticket, reg[index].i_len, reg[index].i_type);
- }
- contwr = *start_lsn = 0;
+ *start_lsn = 0;
- if (ticket->t_curr_res < len) {
- xlog_print_tic_res(mp, ticket);
+ len = xlog_write_calc_vec_length(ticket, log_vector);
+ if (ticket->t_curr_res < len) {
+ xlog_print_tic_res(log->l_mp, ticket);
#ifdef DEBUG
- xlog_panic(
- "xfs_log_write: reservation ran out. Need to up reservation");
+ xlog_panic(
+ "xfs_log_write: reservation ran out. Need to up reservation");
#else
- /* Customer configurable panic */
- xfs_cmn_err(XFS_PTAG_LOGRES, CE_ALERT, mp,
- "xfs_log_write: reservation ran out. Need to up reservation");
- /* If we did not panic, shutdown the filesystem */
- xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
+ /* Customer configurable panic */
+ xfs_cmn_err(XFS_PTAG_LOGRES, CE_ALERT, log->l_mp,
+ "xfs_log_write: reservation ran out. Need to up reservation");
+
+ /* If we did not panic, shutdown the filesystem */
+ xfs_force_shutdown(log->l_mp, SHUTDOWN_CORRUPT_INCORE);
#endif
- } else
+ }
+
ticket->t_curr_res -= len;
- for (index = 0; index < nentries; ) {
- if ((error = xlog_state_get_iclog_space(log, len, &iclog, ticket,
- &contwr, &log_offset)))
- return error;
+ index = 0;
+ lv = log_vector;
+ vecp = lv->lv_iovecp;
+ while (lv && index < lv->lv_niovecs) {
+ void *ptr;
+ int log_offset;
- ASSERT(log_offset <= iclog->ic_size - 1);
- ptr = (__psint_t) ((char *)iclog->ic_datap+log_offset);
+ error = xlog_state_get_iclog_space(log, len, &iclog, ticket,
+ &contwr, &log_offset);
+ if (error)
+ return error;
- /* start_lsn is the first lsn written to. That's all we need. */
- if (! *start_lsn)
- *start_lsn = be64_to_cpu(iclog->ic_header.h_lsn);
+ ASSERT(log_offset <= iclog->ic_size - 1);
+ ptr = iclog->ic_datap + log_offset;
- /* This loop writes out as many regions as can fit in the amount
- * of space which was allocated by xlog_state_get_iclog_space().
- */
- while (index < nentries) {
- ASSERT(reg[index].i_len % sizeof(__int32_t) == 0);
- ASSERT((__psint_t)ptr % sizeof(__int32_t) == 0);
- start_rec_copy = 0;
-
- /* If first write for transaction, insert start record.
- * We can't be trying to commit if we are inited. We can't
- * have any "partial_copy" if we are inited.
- */
- if (ticket->t_flags & XLOG_TIC_INITED) {
- logop_head = (xlog_op_header_t *)ptr;
- logop_head->oh_tid = cpu_to_be32(ticket->t_tid);
- logop_head->oh_clientid = ticket->t_clientid;
- logop_head->oh_len = 0;
- logop_head->oh_flags = XLOG_START_TRANS;
- logop_head->oh_res2 = 0;
- ticket->t_flags &= ~XLOG_TIC_INITED; /* clear bit */
- record_cnt++;
-
- start_rec_copy = sizeof(xlog_op_header_t);
- xlog_write_adv_cnt(ptr, len, log_offset, start_rec_copy);
- }
+ /* start_lsn is the first lsn written to. That's all we need. */
+ if (!*start_lsn)
+ *start_lsn = be64_to_cpu(iclog->ic_header.h_lsn);
- /* Copy log operation header directly into data section */
- logop_head = (xlog_op_header_t *)ptr;
- logop_head->oh_tid = cpu_to_be32(ticket->t_tid);
- logop_head->oh_clientid = ticket->t_clientid;
- logop_head->oh_res2 = 0;
+ /*
+ * This loop writes out as many regions as can fit in the amount
+ * of space which was allocated by xlog_state_get_iclog_space().
+ */
+ while (lv && index < lv->lv_niovecs) {
+ struct xfs_log_iovec *reg = &vecp[index];
+ struct xlog_op_header *ophdr;
+ int start_rec_copy;
+ int copy_len;
+ int copy_off;
+
+ ASSERT(reg->i_len % sizeof(__int32_t) == 0);
+ ASSERT((unsigned long)ptr % sizeof(__int32_t) == 0);
+
+ start_rec_copy = xlog_write_start_rec(ptr, ticket);
+ if (start_rec_copy) {
+ record_cnt++;
+ xlog_write_adv_cnt(&ptr, &len, &log_offset,
+ start_rec_copy);
+ }
- /* header copied directly */
- xlog_write_adv_cnt(ptr, len, log_offset, sizeof(xlog_op_header_t));
+ ophdr = xlog_write_setup_ophdr(log, ptr, ticket, flags);
+ if (!ophdr)
+ return XFS_ERROR(EIO);
- /* are we copying a commit or unmount record? */
- logop_head->oh_flags = flags;
+ xlog_write_adv_cnt(&ptr, &len, &log_offset,
+ sizeof(struct xlog_op_header));
+
+ len += xlog_write_setup_copy(ticket, ophdr,
+ iclog->ic_size-log_offset,
+ reg->i_len,
+ ©_off, ©_len,
+ &partial_copy,
+ &partial_copy_len);
+ xlog_verify_dest_ptr(log, ptr);
+
+ /* copy region */
+ ASSERT(copy_len >= 0);
+ memcpy(ptr, reg->i_addr + copy_off, copy_len);
+ xlog_write_adv_cnt(&ptr, &len, &log_offset, copy_len);
+
+ copy_len += start_rec_copy + sizeof(xlog_op_header_t);
+ record_cnt++;
+ data_cnt += contwr ? copy_len : 0;
+
+ error = xlog_write_copy_finish(log, iclog, flags,
+ &record_cnt, &data_cnt,
+ &partial_copy,
+ &partial_copy_len,
+ log_offset,
+ commit_iclog);
+ if (error)
+ return error;
- /*
- * We've seen logs corrupted with bad transaction client
- * ids. This makes sure that XFS doesn't generate them on.
- * Turn this into an EIO and shut down the filesystem.
- */
- switch (logop_head->oh_clientid) {
- case XFS_TRANSACTION:
- case XFS_VOLUME:
- case XFS_LOG:
- break;
- default:
- xfs_fs_cmn_err(CE_WARN, mp,
- "Bad XFS transaction clientid 0x%x in ticket 0x%p",
- logop_head->oh_clientid, ticket);
- return XFS_ERROR(EIO);
- }
+ /*
+ * if we had a partial copy, we need to get more iclog
+ * space but we don't want to increment the region
+ * index because there is still more is this region to
+ * write.
+ *
+ * If we completed writing this region, and we flushed
+ * the iclog (indicated by resetting of the record
+ * count), then we also need to get more log space. If
+ * this was the last record, though, we are done and
+ * can just return.
+ */
+ if (partial_copy)
+ break;
- /* Partial write last time? => (partial_copy != 0)
- * need_copy is the amount we'd like to copy if everything could
- * fit in the current memcpy.
- */
- need_copy = reg[index].i_len - partial_copy_len;
-
- copy_off = partial_copy_len;
- if (need_copy <= iclog->ic_size - log_offset) { /*complete write */
- copy_len = need_copy;
- logop_head->oh_len = cpu_to_be32(copy_len);
- if (partial_copy)
- logop_head->oh_flags|= (XLOG_END_TRANS|XLOG_WAS_CONT_TRANS);
- partial_copy_len = partial_copy = 0;
- } else { /* partial write */
- copy_len = iclog->ic_size - log_offset;
- logop_head->oh_len = cpu_to_be32(copy_len);
- logop_head->oh_flags |= XLOG_CONTINUE_TRANS;
- if (partial_copy)
- logop_head->oh_flags |= XLOG_WAS_CONT_TRANS;
- partial_copy_len += copy_len;
- partial_copy++;
- len += sizeof(xlog_op_header_t); /* from splitting of region */
- /* account for new log op header */
- ticket->t_curr_res -= sizeof(xlog_op_header_t);
- ticket->t_res_num_ophdrs++;
- }
- xlog_verify_dest_ptr(log, ptr);
-
- /* copy region */
- ASSERT(copy_len >= 0);
- memcpy((xfs_caddr_t)ptr, reg[index].i_addr + copy_off, copy_len);
- xlog_write_adv_cnt(ptr, len, log_offset, copy_len);
-
- /* make copy_len total bytes copied, including headers */
- copy_len += start_rec_copy + sizeof(xlog_op_header_t);
- record_cnt++;
- data_cnt += contwr ? copy_len : 0;
- if (partial_copy) { /* copied partial region */
- /* already marked WANT_SYNC by xlog_state_get_iclog_space */
- xlog_state_finish_copy(log, iclog, record_cnt, data_cnt);
- record_cnt = data_cnt = 0;
- if ((error = xlog_state_release_iclog(log, iclog)))
- return error;
- break; /* don't increment index */
- } else { /* copied entire region */
- index++;
- partial_copy_len = partial_copy = 0;
-
- if (iclog->ic_size - log_offset <= sizeof(xlog_op_header_t)) {
- xlog_state_finish_copy(log, iclog, record_cnt, data_cnt);
- record_cnt = data_cnt = 0;
- spin_lock(&log->l_icloglock);
- xlog_state_want_sync(log, iclog);
- spin_unlock(&log->l_icloglock);
- if (commit_iclog) {
- ASSERT(flags & XLOG_COMMIT_TRANS);
- *commit_iclog = iclog;
- } else if ((error = xlog_state_release_iclog(log, iclog)))
- return error;
- if (index == nentries)
- return 0; /* we are done */
- else
- break;
+ if (++index == lv->lv_niovecs) {
+ lv = lv->lv_next;
+ index = 0;
+ if (lv)
+ vecp = lv->lv_iovecp;
+ }
+ if (record_cnt == 0) {
+ if (!lv)
+ return 0;
+ break;
+ }
}
- } /* if (partial_copy) */
- } /* while (index < nentries) */
- } /* for (index = 0; index < nentries; ) */
- ASSERT(len == 0);
+ }
+
+ ASSERT(len == 0);
+
+ xlog_state_finish_copy(log, iclog, record_cnt, data_cnt);
+ if (!commit_iclog)
+ return xlog_state_release_iclog(log, iclog);
- xlog_state_finish_copy(log, iclog, record_cnt, data_cnt);
- if (commit_iclog) {
ASSERT(flags & XLOG_COMMIT_TRANS);
*commit_iclog = iclog;
return 0;
- }
- return xlog_state_release_iclog(log, iclog);
-} /* xlog_write */
+}
/*****************************************************************************
* Allocate and initialise a new log ticket.
*/
STATIC xlog_ticket_t *
-xlog_ticket_alloc(xlog_t *log,
- int unit_bytes,
- int cnt,
- char client,
- uint xflags)
+xlog_ticket_alloc(
+ struct log *log,
+ int unit_bytes,
+ int cnt,
+ char client,
+ uint xflags)
{
- xlog_ticket_t *tic;
+ struct xlog_ticket *tic;
uint num_headers;
+ int iclog_space;
tic = kmem_zone_zalloc(xfs_log_ticket_zone, KM_SLEEP|KM_MAYFAIL);
if (!tic)
/* for start-rec */
unit_bytes += sizeof(xlog_op_header_t);
- /* for LR headers */
- num_headers = ((unit_bytes + log->l_iclog_size-1) >> log->l_iclog_size_log);
+ /*
+ * for LR headers - the space for data in an iclog is the size minus
+ * the space used for the headers. If we use the iclog size, then we
+ * undercalculate the number of headers required.
+ *
+ * Furthermore - the addition of op headers for split-recs might
+ * increase the space required enough to require more log and op
+ * headers, so take that into account too.
+ *
+ * IMPORTANT: This reservation makes the assumption that if this
+ * transaction is the first in an iclog and hence has the LR headers
+ * accounted to it, then the remaining space in the iclog is
+ * exclusively for this transaction. i.e. if the transaction is larger
+ * than the iclog, it will be the only thing in that iclog.
+ * Fundamentally, this means we must pass the entire log vector to
+ * xlog_write to guarantee this.
+ */
+ iclog_space = log->l_iclog_size - log->l_iclog_hsize;
+ num_headers = howmany(unit_bytes, iclog_space);
+
+ /* for split-recs - ophdrs added when data split over LRs */
+ unit_bytes += sizeof(xlog_op_header_t) * num_headers;
+
+ /* add extra header reservations if we overrun */
+ while (!num_headers ||
+ howmany(unit_bytes, iclog_space) > num_headers) {
+ unit_bytes += sizeof(xlog_op_header_t);
+ num_headers++;
+ }
unit_bytes += log->l_iclog_hsize * num_headers;
/* for commit-rec LR header - note: padding will subsume the ophdr */
unit_bytes += log->l_iclog_hsize;
- /* for split-recs - ophdrs added when data split over LRs */
- unit_bytes += sizeof(xlog_op_header_t) * num_headers;
-
/* for roundoff padding for transaction data and one for commit record */
if (xfs_sb_version_haslogv2(&log->l_mp->m_sb) &&
log->l_mp->m_sb.sb_logsunit > 1) {
tic->t_curr_res = unit_bytes;
tic->t_cnt = cnt;
tic->t_ocnt = cnt;
- tic->t_tid = (xlog_tid_t)((__psint_t)tic & 0xffffffff);
+ tic->t_tid = random32();
tic->t_clientid = client;
tic->t_flags = XLOG_TIC_INITED;
tic->t_trans_type = 0;
if (xflags & XFS_LOG_PERM_RESERV)
tic->t_flags |= XLOG_TIC_PERM_RESERV;
- sv_init(&(tic->t_wait), SV_DEFAULT, "logtick");
+ sv_init(&tic->t_wait, SV_DEFAULT, "logtick");
xlog_tic_reset_res(tic);
* part of the log in case we trash the log structure.
*/
void
-xlog_verify_dest_ptr(xlog_t *log,
- __psint_t ptr)
+xlog_verify_dest_ptr(
+ struct log *log,
+ char *ptr)
{
int i;
int good_ptr = 0;
- for (i=0; i < log->l_iclog_bufs; i++) {
- if (ptr >= (__psint_t)log->l_iclog_bak[i] &&
- ptr <= (__psint_t)log->l_iclog_bak[i]+log->l_iclog_size)
+ for (i = 0; i < log->l_iclog_bufs; i++) {
+ if (ptr >= log->l_iclog_bak[i] &&
+ ptr <= log->l_iclog_bak[i] + log->l_iclog_size)
good_ptr++;
}
- if (! good_ptr)
+
+ if (!good_ptr)
xlog_panic("xlog_verify_dest_ptr: invalid ptr");
-} /* xlog_verify_dest_ptr */
+}
STATIC void
xlog_verify_grant_head(xlog_t *log, int equals)
git.openpandora.org / pandora-kernel.git / blobdiff