diff options
Diffstat (limited to 'sys/contrib/opensolaris/uts/common/fs/zfs/zfs_log.c')
-rw-r--r-- | sys/contrib/opensolaris/uts/common/fs/zfs/zfs_log.c | 349 |
1 files changed, 349 insertions, 0 deletions
diff --git a/sys/contrib/opensolaris/uts/common/fs/zfs/zfs_log.c b/sys/contrib/opensolaris/uts/common/fs/zfs/zfs_log.c new file mode 100644 index 0000000..dde9ec1 --- /dev/null +++ b/sys/contrib/opensolaris/uts/common/fs/zfs/zfs_log.c @@ -0,0 +1,349 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License (the "License"). + * You may not use this file except in compliance with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ +/* + * Copyright 2007 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +#pragma ident "%Z%%M% %I% %E% SMI" + +#include <sys/types.h> +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/sysmacros.h> +#include <sys/cmn_err.h> +#include <sys/kmem.h> +#include <sys/file.h> +#include <sys/vfs.h> +#include <sys/zfs_znode.h> +#include <sys/zfs_dir.h> +#include <sys/zil.h> +#include <sys/byteorder.h> +#include <sys/policy.h> +#include <sys/stat.h> +#include <sys/acl.h> +#include <sys/dmu.h> +#include <sys/spa.h> + +/* + * All the functions in this file are used to construct the log entries + * to record transactions. They allocate * a intent log transaction + * structure (itx_t) and save within it all the information necessary to + * possibly replay the transaction. The itx is then assigned a sequence + * number and inserted in the in-memory list anchored in the zilog. + */ + +/* + * zfs_log_create() is used to handle TX_CREATE, TX_MKDIR and TX_MKXATTR + * transactions. + */ +void +zfs_log_create(zilog_t *zilog, dmu_tx_t *tx, int txtype, + znode_t *dzp, znode_t *zp, char *name) +{ + itx_t *itx; + uint64_t seq; + lr_create_t *lr; + size_t namesize = strlen(name) + 1; + + if (zilog == NULL) + return; + + itx = zil_itx_create(txtype, sizeof (*lr) + namesize); + lr = (lr_create_t *)&itx->itx_lr; + lr->lr_doid = dzp->z_id; + lr->lr_foid = zp->z_id; + lr->lr_mode = zp->z_phys->zp_mode; + lr->lr_uid = zp->z_phys->zp_uid; + lr->lr_gid = zp->z_phys->zp_gid; + lr->lr_gen = zp->z_phys->zp_gen; + lr->lr_crtime[0] = zp->z_phys->zp_crtime[0]; + lr->lr_crtime[1] = zp->z_phys->zp_crtime[1]; + lr->lr_rdev = zp->z_phys->zp_rdev; + bcopy(name, (char *)(lr + 1), namesize); + + seq = zil_itx_assign(zilog, itx, tx); + dzp->z_last_itx = seq; + zp->z_last_itx = seq; +} + +/* + * zfs_log_remove() handles both TX_REMOVE and TX_RMDIR transactions. + */ +void +zfs_log_remove(zilog_t *zilog, dmu_tx_t *tx, int txtype, + znode_t *dzp, char *name) +{ + itx_t *itx; + uint64_t seq; + lr_remove_t *lr; + size_t namesize = strlen(name) + 1; + + if (zilog == NULL) + return; + + itx = zil_itx_create(txtype, sizeof (*lr) + namesize); + lr = (lr_remove_t *)&itx->itx_lr; + lr->lr_doid = dzp->z_id; + bcopy(name, (char *)(lr + 1), namesize); + + seq = zil_itx_assign(zilog, itx, tx); + dzp->z_last_itx = seq; +} + +/* + * zfs_log_link() handles TX_LINK transactions. + */ +void +zfs_log_link(zilog_t *zilog, dmu_tx_t *tx, int txtype, + znode_t *dzp, znode_t *zp, char *name) +{ + itx_t *itx; + uint64_t seq; + lr_link_t *lr; + size_t namesize = strlen(name) + 1; + + if (zilog == NULL) + return; + + itx = zil_itx_create(txtype, sizeof (*lr) + namesize); + lr = (lr_link_t *)&itx->itx_lr; + lr->lr_doid = dzp->z_id; + lr->lr_link_obj = zp->z_id; + bcopy(name, (char *)(lr + 1), namesize); + + seq = zil_itx_assign(zilog, itx, tx); + dzp->z_last_itx = seq; + zp->z_last_itx = seq; +} + +/* + * zfs_log_symlink() handles TX_SYMLINK transactions. + */ +void +zfs_log_symlink(zilog_t *zilog, dmu_tx_t *tx, int txtype, + znode_t *dzp, znode_t *zp, char *name, char *link) +{ + itx_t *itx; + uint64_t seq; + lr_create_t *lr; + size_t namesize = strlen(name) + 1; + size_t linksize = strlen(link) + 1; + + if (zilog == NULL) + return; + + itx = zil_itx_create(txtype, sizeof (*lr) + namesize + linksize); + lr = (lr_create_t *)&itx->itx_lr; + lr->lr_doid = dzp->z_id; + lr->lr_foid = zp->z_id; + lr->lr_mode = zp->z_phys->zp_mode; + lr->lr_uid = zp->z_phys->zp_uid; + lr->lr_gid = zp->z_phys->zp_gid; + lr->lr_gen = zp->z_phys->zp_gen; + lr->lr_crtime[0] = zp->z_phys->zp_crtime[0]; + lr->lr_crtime[1] = zp->z_phys->zp_crtime[1]; + bcopy(name, (char *)(lr + 1), namesize); + bcopy(link, (char *)(lr + 1) + namesize, linksize); + + seq = zil_itx_assign(zilog, itx, tx); + dzp->z_last_itx = seq; + zp->z_last_itx = seq; +} + +/* + * zfs_log_rename() handles TX_RENAME transactions. + */ +void +zfs_log_rename(zilog_t *zilog, dmu_tx_t *tx, int txtype, + znode_t *sdzp, char *sname, znode_t *tdzp, char *dname, znode_t *szp) +{ + itx_t *itx; + uint64_t seq; + lr_rename_t *lr; + size_t snamesize = strlen(sname) + 1; + size_t dnamesize = strlen(dname) + 1; + + if (zilog == NULL) + return; + + itx = zil_itx_create(txtype, sizeof (*lr) + snamesize + dnamesize); + lr = (lr_rename_t *)&itx->itx_lr; + lr->lr_sdoid = sdzp->z_id; + lr->lr_tdoid = tdzp->z_id; + bcopy(sname, (char *)(lr + 1), snamesize); + bcopy(dname, (char *)(lr + 1) + snamesize, dnamesize); + + seq = zil_itx_assign(zilog, itx, tx); + sdzp->z_last_itx = seq; + tdzp->z_last_itx = seq; + szp->z_last_itx = seq; +} + +/* + * zfs_log_write() handles TX_WRITE transactions. + */ +ssize_t zfs_immediate_write_sz = 32768; + +void +zfs_log_write(zilog_t *zilog, dmu_tx_t *tx, int txtype, + znode_t *zp, offset_t off, ssize_t len, int ioflag) +{ + itx_t *itx; + uint64_t seq; + lr_write_t *lr; + itx_wr_state_t write_state; + int err; + + if (zilog == NULL || zp->z_unlinked) + return; + + /* + * Writes are handled in three different ways: + * + * WR_INDIRECT: + * If the write is greater than zfs_immediate_write_sz then + * later *if* we need to log the write then dmu_sync() is used + * to immediately write the block and it's block pointer is put + * in the log record. + * WR_COPIED: + * If we know we'll immediately be committing the + * transaction (FDSYNC (O_DSYNC)), the we allocate a larger + * log record here for the data and copy the data in. + * WR_NEED_COPY: + * Otherwise we don't allocate a buffer, and *if* we need to + * flush the write later then a buffer is allocated and + * we retrieve the data using the dmu. + */ + if (len > zfs_immediate_write_sz) + write_state = WR_INDIRECT; + else if (ioflag & FDSYNC) + write_state = WR_COPIED; + else + write_state = WR_NEED_COPY; + + itx = zil_itx_create(txtype, sizeof (*lr) + + (write_state == WR_COPIED ? len : 0)); + lr = (lr_write_t *)&itx->itx_lr; + if (write_state == WR_COPIED) { + err = dmu_read(zp->z_zfsvfs->z_os, zp->z_id, off, len, lr + 1); + if (err) { + kmem_free(itx, offsetof(itx_t, itx_lr) + + itx->itx_lr.lrc_reclen); + itx = zil_itx_create(txtype, sizeof (*lr)); + lr = (lr_write_t *)&itx->itx_lr; + write_state = WR_NEED_COPY; + } + } + + itx->itx_wr_state = write_state; + lr->lr_foid = zp->z_id; + lr->lr_offset = off; + lr->lr_length = len; + lr->lr_blkoff = 0; + BP_ZERO(&lr->lr_blkptr); + + itx->itx_private = zp->z_zfsvfs; + + itx->itx_sync = (zp->z_sync_cnt != 0); + seq = zil_itx_assign(zilog, itx, tx); + zp->z_last_itx = seq; +} + +/* + * zfs_log_truncate() handles TX_TRUNCATE transactions. + */ +void +zfs_log_truncate(zilog_t *zilog, dmu_tx_t *tx, int txtype, + znode_t *zp, uint64_t off, uint64_t len) +{ + itx_t *itx; + uint64_t seq; + lr_truncate_t *lr; + + if (zilog == NULL || zp->z_unlinked) + return; + + itx = zil_itx_create(txtype, sizeof (*lr)); + lr = (lr_truncate_t *)&itx->itx_lr; + lr->lr_foid = zp->z_id; + lr->lr_offset = off; + lr->lr_length = len; + + itx->itx_sync = (zp->z_sync_cnt != 0); + seq = zil_itx_assign(zilog, itx, tx); + zp->z_last_itx = seq; +} + +/* + * zfs_log_setattr() handles TX_SETATTR transactions. + */ +void +zfs_log_setattr(zilog_t *zilog, dmu_tx_t *tx, int txtype, + znode_t *zp, vattr_t *vap, uint_t mask_applied) +{ + itx_t *itx; + uint64_t seq; + lr_setattr_t *lr; + + if (zilog == NULL || zp->z_unlinked) + return; + + itx = zil_itx_create(txtype, sizeof (*lr)); + lr = (lr_setattr_t *)&itx->itx_lr; + lr->lr_foid = zp->z_id; + lr->lr_mask = (uint64_t)mask_applied; + lr->lr_mode = (uint64_t)vap->va_mode; + lr->lr_uid = (uint64_t)vap->va_uid; + lr->lr_gid = (uint64_t)vap->va_gid; + lr->lr_size = (uint64_t)vap->va_size; + ZFS_TIME_ENCODE(&vap->va_atime, lr->lr_atime); + ZFS_TIME_ENCODE(&vap->va_mtime, lr->lr_mtime); + + itx->itx_sync = (zp->z_sync_cnt != 0); + seq = zil_itx_assign(zilog, itx, tx); + zp->z_last_itx = seq; +} + +/* + * zfs_log_acl() handles TX_ACL transactions. + */ +void +zfs_log_acl(zilog_t *zilog, dmu_tx_t *tx, int txtype, + znode_t *zp, int aclcnt, ace_t *z_ace) +{ + itx_t *itx; + uint64_t seq; + lr_acl_t *lr; + + if (zilog == NULL || zp->z_unlinked) + return; + + itx = zil_itx_create(txtype, sizeof (*lr) + aclcnt * sizeof (ace_t)); + lr = (lr_acl_t *)&itx->itx_lr; + lr->lr_foid = zp->z_id; + lr->lr_aclcnt = (uint64_t)aclcnt; + bcopy(z_ace, (ace_t *)(lr + 1), aclcnt * sizeof (ace_t)); + + itx->itx_sync = (zp->z_sync_cnt != 0); + seq = zil_itx_assign(zilog, itx, tx); + zp->z_last_itx = seq; +} |