X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=fs%2Fxfs%2Flinux-2.6%2Fxfs_lrw.c;h=5d9cfd91ad08638012b8365d7d46b4c27959e936;hb=52ab3f3dc711eeccbfbcc5d4f5c5d9b9ff59650f;hp=0169360475c411825249e65aa3e318bca38615ac;hpb=cec6062037783a762aa5606b06b8bc5c14d9657f;p=powerpc.git diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c index 0169360475..5d9cfd91ad 100644 --- a/fs/xfs/linux-2.6/xfs_lrw.c +++ b/fs/xfs/linux-2.6/xfs_lrw.c @@ -23,7 +23,6 @@ #include "xfs_trans.h" #include "xfs_sb.h" #include "xfs_ag.h" -#include "xfs_dir.h" #include "xfs_dir2.h" #include "xfs_alloc.h" #include "xfs_dmapi.h" @@ -32,7 +31,6 @@ #include "xfs_bmap_btree.h" #include "xfs_alloc_btree.h" #include "xfs_ialloc_btree.h" -#include "xfs_dir_sf.h" #include "xfs_dir2_sf.h" #include "xfs_attr_sf.h" #include "xfs_dinode.h" @@ -206,7 +204,7 @@ xfs_read( xfs_fsize_t n; xfs_inode_t *ip; xfs_mount_t *mp; - vnode_t *vp; + bhv_vnode_t *vp; unsigned long seg; ip = XFS_BHVTOI(bdp); @@ -258,7 +256,7 @@ xfs_read( if (DM_EVENT_ENABLED(vp->v_vfsp, ip, DM_EVENT_READ) && !(ioflags & IO_INVIS)) { - vrwlock_t locktype = VRWLOCK_READ; + bhv_vrwlock_t locktype = VRWLOCK_READ; int dmflags = FILP_DELAY_FLAG(file) | DM_SEM_FLAG_RD(ioflags); ret = -XFS_SEND_DATA(mp, DM_EVENT_READ, @@ -271,7 +269,7 @@ xfs_read( } if (unlikely((ioflags & IO_ISDIRECT) && VN_CACHED(vp))) - VOP_FLUSHINVAL_PAGES(vp, ctooff(offtoct(*offset)), + bhv_vop_flushinval_pages(vp, ctooff(offtoct(*offset)), -1, FI_REMAPF_LOCKED); xfs_rw_enter_trace(XFS_READ_ENTER, &ip->i_iocore, @@ -301,36 +299,23 @@ xfs_sendfile( void *target, cred_t *credp) { + xfs_inode_t *ip = XFS_BHVTOI(bdp); + xfs_mount_t *mp = ip->i_mount; ssize_t ret; - xfs_fsize_t n; - xfs_inode_t *ip; - xfs_mount_t *mp; - vnode_t *vp; - - ip = XFS_BHVTOI(bdp); - vp = BHV_TO_VNODE(bdp); - mp = ip->i_mount; XFS_STATS_INC(xs_read_calls); - - n = XFS_MAXIOFFSET(mp) - *offset; - if ((n <= 0) || (count == 0)) - return 0; - - if (n < count) - count = n; - - if (XFS_FORCED_SHUTDOWN(ip->i_mount)) + if (XFS_FORCED_SHUTDOWN(mp)) return -EIO; xfs_ilock(ip, XFS_IOLOCK_SHARED); - if (DM_EVENT_ENABLED(vp->v_vfsp, ip, DM_EVENT_READ) && + if (DM_EVENT_ENABLED(BHV_TO_VNODE(bdp)->v_vfsp, ip, DM_EVENT_READ) && (!(ioflags & IO_INVIS))) { - vrwlock_t locktype = VRWLOCK_READ; + bhv_vrwlock_t locktype = VRWLOCK_READ; int error; - error = XFS_SEND_DATA(mp, DM_EVENT_READ, BHV_TO_VNODE(bdp), *offset, count, + error = XFS_SEND_DATA(mp, DM_EVENT_READ, BHV_TO_VNODE(bdp), + *offset, count, FILP_DELAY_FLAG(filp), &locktype); if (error) { xfs_iunlock(ip, XFS_IOLOCK_SHARED); @@ -340,12 +325,98 @@ xfs_sendfile( xfs_rw_enter_trace(XFS_SENDFILE_ENTER, &ip->i_iocore, (void *)(unsigned long)target, count, *offset, ioflags); ret = generic_file_sendfile(filp, offset, count, actor, target); + if (ret > 0) + XFS_STATS_ADD(xs_read_bytes, ret); xfs_iunlock(ip, XFS_IOLOCK_SHARED); + return ret; +} + +ssize_t +xfs_splice_read( + bhv_desc_t *bdp, + struct file *infilp, + loff_t *ppos, + struct pipe_inode_info *pipe, + size_t count, + int flags, + int ioflags, + cred_t *credp) +{ + xfs_inode_t *ip = XFS_BHVTOI(bdp); + xfs_mount_t *mp = ip->i_mount; + ssize_t ret; + + XFS_STATS_INC(xs_read_calls); + if (XFS_FORCED_SHUTDOWN(ip->i_mount)) + return -EIO; + + xfs_ilock(ip, XFS_IOLOCK_SHARED); + + if (DM_EVENT_ENABLED(BHV_TO_VNODE(bdp)->v_vfsp, ip, DM_EVENT_READ) && + (!(ioflags & IO_INVIS))) { + bhv_vrwlock_t locktype = VRWLOCK_READ; + int error; + error = XFS_SEND_DATA(mp, DM_EVENT_READ, BHV_TO_VNODE(bdp), + *ppos, count, + FILP_DELAY_FLAG(infilp), &locktype); + if (error) { + xfs_iunlock(ip, XFS_IOLOCK_SHARED); + return -error; + } + } + xfs_rw_enter_trace(XFS_SPLICE_READ_ENTER, &ip->i_iocore, + pipe, count, *ppos, ioflags); + ret = generic_file_splice_read(infilp, ppos, pipe, count, flags); if (ret > 0) XFS_STATS_ADD(xs_read_bytes, ret); + xfs_iunlock(ip, XFS_IOLOCK_SHARED); + return ret; +} + +ssize_t +xfs_splice_write( + bhv_desc_t *bdp, + struct pipe_inode_info *pipe, + struct file *outfilp, + loff_t *ppos, + size_t count, + int flags, + int ioflags, + cred_t *credp) +{ + xfs_inode_t *ip = XFS_BHVTOI(bdp); + xfs_mount_t *mp = ip->i_mount; + ssize_t ret; + + XFS_STATS_INC(xs_write_calls); + if (XFS_FORCED_SHUTDOWN(ip->i_mount)) + return -EIO; + + xfs_ilock(ip, XFS_IOLOCK_EXCL); + + if (DM_EVENT_ENABLED(BHV_TO_VNODE(bdp)->v_vfsp, ip, DM_EVENT_WRITE) && + (!(ioflags & IO_INVIS))) { + bhv_vrwlock_t locktype = VRWLOCK_WRITE; + int error; + + error = XFS_SEND_DATA(mp, DM_EVENT_WRITE, BHV_TO_VNODE(bdp), + *ppos, count, + FILP_DELAY_FLAG(outfilp), &locktype); + if (error) { + xfs_iunlock(ip, XFS_IOLOCK_EXCL); + return -error; + } + } + xfs_rw_enter_trace(XFS_SPLICE_WRITE_ENTER, &ip->i_iocore, + pipe, count, *ppos, ioflags); + ret = generic_file_splice_write(pipe, outfilp, ppos, count, flags); + if (ret > 0) + XFS_STATS_ADD(xs_write_bytes, ret); + + xfs_iunlock(ip, XFS_IOLOCK_EXCL); return ret; } @@ -363,7 +434,7 @@ xfs_zero_last_block( xfs_fsize_t end_size) { xfs_fileoff_t last_fsb; - xfs_mount_t *mp; + xfs_mount_t *mp = io->io_mount; int nimaps; int zero_offset; int zero_len; @@ -373,8 +444,6 @@ xfs_zero_last_block( ASSERT(ismrlocked(io->io_lock, MR_UPDATE) != 0); - mp = io->io_mount; - zero_offset = XFS_B_FSB_OFFSET(mp, isize); if (zero_offset == 0) { /* @@ -387,7 +456,7 @@ xfs_zero_last_block( last_fsb = XFS_B_TO_FSBT(mp, isize); nimaps = 1; error = XFS_BMAPI(mp, NULL, io, last_fsb, 1, 0, NULL, 0, &imap, - &nimaps, NULL); + &nimaps, NULL, NULL); if (error) { return error; } @@ -405,10 +474,9 @@ xfs_zero_last_block( * don't deadlock when the buffer cache calls back to us. */ XFS_IUNLOCK(mp, io, XFS_ILOCK_EXCL| XFS_EXTSIZE_RD); - loff = XFS_FSB_TO_B(mp, last_fsb); + loff = XFS_FSB_TO_B(mp, last_fsb); zero_len = mp->m_sb.sb_blocksize - zero_offset; - error = xfs_iozero(ip, loff + zero_offset, zero_len, end_size); XFS_ILOCK(mp, io, XFS_ILOCK_EXCL|XFS_EXTSIZE_RD); @@ -429,7 +497,7 @@ xfs_zero_last_block( int /* error (positive) */ xfs_zero_eof( - vnode_t *vp, + bhv_vnode_t *vp, xfs_iocore_t *io, xfs_off_t offset, /* starting I/O offset */ xfs_fsize_t isize, /* current inode size */ @@ -440,8 +508,7 @@ xfs_zero_eof( xfs_fileoff_t end_zero_fsb; xfs_fileoff_t zero_count_fsb; xfs_fileoff_t last_fsb; - xfs_extlen_t buf_len_fsb; - xfs_mount_t *mp; + xfs_mount_t *mp = io->io_mount; int nimaps; int error = 0; xfs_bmbt_irec_t imap; @@ -450,8 +517,6 @@ xfs_zero_eof( ASSERT(ismrlocked(io->io_iolock, MR_UPDATE)); ASSERT(offset > isize); - mp = io->io_mount; - /* * First handle zeroing the block on which isize resides. * We only zero a part of that block so it is handled specially. @@ -488,7 +553,7 @@ xfs_zero_eof( nimaps = 1; zero_count_fsb = end_zero_fsb - start_zero_fsb + 1; error = XFS_BMAPI(mp, NULL, io, start_zero_fsb, zero_count_fsb, - 0, NULL, 0, &imap, &nimaps, NULL); + 0, NULL, 0, &imap, &nimaps, NULL, NULL); if (error) { ASSERT(ismrlocked(io->io_lock, MR_UPDATE)); ASSERT(ismrlocked(io->io_iolock, MR_UPDATE)); @@ -511,16 +576,7 @@ xfs_zero_eof( } /* - * There are blocks in the range requested. - * Zero them a single write at a time. We actually - * don't zero the entire range returned if it is - * too big and simply loop around to get the rest. - * That is not the most efficient thing to do, but it - * is simple and this path should not be exercised often. - */ - buf_len_fsb = XFS_FILBLKS_MIN(imap.br_blockcount, - mp->m_writeio_blocks << 8); - /* + * There are blocks we need to zero. * Drop the inode lock while we're doing the I/O. * We'll still have the iolock to protect us. */ @@ -528,14 +584,13 @@ xfs_zero_eof( error = xfs_iozero(ip, XFS_FSB_TO_B(mp, start_zero_fsb), - XFS_FSB_TO_B(mp, buf_len_fsb), + XFS_FSB_TO_B(mp, imap.br_blockcount), end_size); - if (error) { goto out_lock; } - start_zero_fsb = imap.br_startoff + buf_len_fsb; + start_zero_fsb = imap.br_startoff + imap.br_blockcount; ASSERT(start_zero_fsb <= (end_zero_fsb + 1)); XFS_ILOCK(mp, io, XFS_ILOCK_EXCL|XFS_EXTSIZE_RD); @@ -569,11 +624,11 @@ xfs_write( ssize_t ret = 0, error = 0; xfs_fsize_t isize, new_size; xfs_iocore_t *io; - vnode_t *vp; + bhv_vnode_t *vp; unsigned long seg; int iolock; int eventsent = 0; - vrwlock_t locktype; + bhv_vrwlock_t locktype; size_t ocount = 0, count; loff_t pos; int need_i_mutex = 1, need_flush = 0; @@ -611,11 +666,11 @@ xfs_write( io = &xip->i_iocore; mp = io->io_mount; + vfs_wait_for_freeze(vp->v_vfsp, SB_FREEZE_WRITE); + if (XFS_FORCED_SHUTDOWN(mp)) return -EIO; - fs_check_frozen(vp->v_vfsp, SB_FREEZE_WRITE); - if (ioflags & IO_ISDIRECT) { xfs_buftarg_t *target = (xip->i_d.di_flags & XFS_DIFLAG_REALTIME) ? @@ -681,7 +736,7 @@ start: eventsent = 1; /* - * The iolock was dropped and reaquired in XFS_SEND_DATA + * The iolock was dropped and reacquired in XFS_SEND_DATA * so we have to recheck the size when appending. * We will only "goto start;" once, since having sent the * event prevents another call to XFS_SEND_DATA, which is @@ -746,7 +801,7 @@ retry: if (need_flush) { xfs_inval_cached_trace(io, pos, -1, ctooff(offtoct(pos)), -1); - VOP_FLUSHINVAL_PAGES(vp, ctooff(offtoct(pos)), + bhv_vop_flushinval_pages(vp, ctooff(offtoct(pos)), -1, FI_REMAPF_LOCKED); } @@ -835,79 +890,9 @@ retry: /* Handle various SYNC-type writes */ if ((file->f_flags & O_SYNC) || IS_SYNC(inode)) { - /* - * If we're treating this as O_DSYNC and we have not updated the - * size, force the log. - */ - if (!(mp->m_flags & XFS_MOUNT_OSYNCISOSYNC) && - !(xip->i_update_size)) { - xfs_inode_log_item_t *iip = xip->i_itemp; - - /* - * If an allocation transaction occurred - * without extending the size, then we have to force - * the log up the proper point to ensure that the - * allocation is permanent. We can't count on - * the fact that buffered writes lock out direct I/O - * writes - the direct I/O write could have extended - * the size nontransactionally, then finished before - * we started. xfs_write_file will think that the file - * didn't grow but the update isn't safe unless the - * size change is logged. - * - * Force the log if we've committed a transaction - * against the inode or if someone else has and - * the commit record hasn't gone to disk (e.g. - * the inode is pinned). This guarantees that - * all changes affecting the inode are permanent - * when we return. - */ - if (iip && iip->ili_last_lsn) { - xfs_log_force(mp, iip->ili_last_lsn, - XFS_LOG_FORCE | XFS_LOG_SYNC); - } else if (xfs_ipincount(xip) > 0) { - xfs_log_force(mp, (xfs_lsn_t)0, - XFS_LOG_FORCE | XFS_LOG_SYNC); - } - - } else { - xfs_trans_t *tp; - - /* - * O_SYNC or O_DSYNC _with_ a size update are handled - * the same way. - * - * If the write was synchronous then we need to make - * sure that the inode modification time is permanent. - * We'll have updated the timestamp above, so here - * we use a synchronous transaction to log the inode. - * It's not fast, but it's necessary. - * - * If this a dsync write and the size got changed - * non-transactionally, then we need to ensure that - * the size change gets logged in a synchronous - * transaction. - */ - - tp = xfs_trans_alloc(mp, XFS_TRANS_WRITE_SYNC); - if ((error = xfs_trans_reserve(tp, 0, - XFS_SWRITE_LOG_RES(mp), - 0, 0, 0))) { - /* Transaction reserve failed */ - xfs_trans_cancel(tp, 0); - } else { - /* Transaction reserve successful */ - xfs_ilock(xip, XFS_ILOCK_EXCL); - xfs_trans_ijoin(tp, xip, XFS_ILOCK_EXCL); - xfs_trans_ihold(tp, xip); - xfs_trans_log_inode(tp, xip, XFS_ILOG_CORE); - xfs_trans_set_sync(tp); - error = xfs_trans_commit(tp, 0, NULL); - xfs_iunlock(xip, XFS_ILOCK_EXCL); - } - if (error) - goto out_unlock_internal; - } + error = xfs_write_sync_logforce(mp, xip); + if (error) + goto out_unlock_internal; xfs_rwunlock(bdp, locktype); if (need_i_mutex)