diff options
Diffstat (limited to 'fs/xfs/xfs_log.c')
| -rw-r--r-- | fs/xfs/xfs_log.c | 702 |
1 files changed, 445 insertions, 257 deletions
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index 2be01913628..3038dd52c72 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -44,13 +44,8 @@ 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, @@ -59,11 +54,9 @@ STATIC xlog_t * xlog_alloc_log(xfs_mount_t *mp, 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); @@ -102,7 +95,7 @@ STATIC xlog_ticket_t *xlog_ticket_alloc(xlog_t *log, 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); @@ -258,7 +251,7 @@ xfs_log_done( * 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; @@ -516,18 +509,10 @@ xfs_log_unmount_write(xfs_mount_t *mp) #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). @@ -549,16 +534,30 @@ xfs_log_unmount_write(xfs_mount_t *mp) } 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, @@ -648,10 +647,26 @@ xfs_log_unmount(xfs_mount_t *mp) 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( @@ -663,11 +678,15 @@ 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; @@ -1020,6 +1039,7 @@ xlog_alloc_log(xfs_mount_t *mp, int i; int iclogsize; int error = ENOMEM; + uint log2_size = 0; log = kmem_zalloc(sizeof(xlog_t), KM_MAYFAIL); if (!log) { @@ -1045,29 +1065,30 @@ xlog_alloc_log(xfs_mount_t *mp, 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); @@ -1174,26 +1195,31 @@ out: * 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 @@ -1614,6 +1640,192 @@ xlog_print_tic_res(xfs_mount_t *mp, xlog_ticket_t *ticket) } /* + * 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 * * This will be called when writing externally provided regions or when @@ -1655,209 +1867,157 @@ xlog_print_tic_res(xfs_mount_t *mp, xlog_ticket_t *ticket) */ 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 */ +} /***************************************************************************** @@ -3157,14 +3317,16 @@ xfs_log_ticket_get( * 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) @@ -3208,16 +3370,40 @@ xlog_ticket_alloc(xlog_t *log, /* 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) { @@ -3233,13 +3419,13 @@ xlog_ticket_alloc(xlog_t *log, 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); @@ -3260,20 +3446,22 @@ xlog_ticket_alloc(xlog_t *log, * 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) |