/* * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static int cachefs_dlog_mapreserve(fscache_t *fscp, int size); #ifdef _LP64 static void cachefs_dlog_attrchk(vattr_t *vap, char *funcname); #define CACHEFS_DLOG_TS_COPY(in_tsp, out_tsp, str, str1) \ { \ int ovferr = 0; \ CACHEFS_TS_TO_CFS_TS_COPY(in_tsp, out_tsp, ovferr); \ if (ovferr) \ cmn_err(CE_WARN, "%s%s overflow", str, str1); \ } #define CACHEFS_DLOG_DEV_COPY(in_dev, out_dev, str, str1) \ { \ int ovferr = 0; \ CACHEFS_DEV_TO_CFS_DEV_COPY(in_dev, out_dev, ovferr); \ if (ovferr) \ cmn_err(CE_WARN, "%s%s 0x%lx -> 0x%x overflow", \ str, str1, in_dev, (dev32_t)(out_dev)); \ } #define CACHEFS_DLOG_VATTR_COPY(in_vap, out_vap, str) \ { \ int ovferr = 0; \ CACHEFS_VATTR_TO_CFS_VATTR_COPY(in_vap, out_vap, ovferr); \ if (ovferr) \ cachefs_dlog_attrchk(in_vap, str); \ } /* * check attr error - if we get an overflow error copying vattr, make sure * the field affected is actually wanted, or it might be junk */ static void cachefs_dlog_attrchk(vattr_t *vap, char *str) { dev_t tmpdev; cfs_timestruc_t ts; if (vap->va_mask & AT_FSID) { CACHEFS_DLOG_DEV_COPY(vap->va_fsid, tmpdev, str, ".va_fsid"); } if (vap->va_mask & AT_RDEV) { CACHEFS_DLOG_DEV_COPY(vap->va_rdev, tmpdev, str, ".va_rdev"); } if (vap->va_mask & AT_MTIME) { CACHEFS_DLOG_TS_COPY(&vap->va_mtime, &ts, str, ".va_mtime"); } if (vap->va_mask & AT_ATIME) { CACHEFS_DLOG_TS_COPY(&vap->va_atime, &ts, str, ".va_atime"); } if (vap->va_mask & AT_CTIME) { CACHEFS_DLOG_TS_COPY(&vap->va_ctime, &ts, str, ".va_ctime"); } } #else /* not _LP64 */ #define CACHEFS_DLOG_TS_COPY(in_tsp, out_tsp, str, str1) \ CACHEFS_TS_TO_CFS_TS_COPY(in_tsp, out_tsp, error) #define CACHEFS_DLOG_DEV_COPY(in_dev, out_dev, str, str1) \ CACHEFS_DEV_TO_CFS_DEV_COPY(in_dev, out_dev, error) #define CACHEFS_DLOG_VATTR_COPY(in_vap, out_vap, str) \ CACHEFS_VATTR_TO_CFS_VATTR_COPY(in_vap, out_vap, error) #endif /* _LP64 */ /* * * Cachefs used to know too much about how creds looked; since it's * committed to persistent storage, we can't change the layout so * it now has a "dl_cred_t" which (unsurprisingly) looks exactly like * an old credential. * * The dst argument needs to point to: * struct dl_cred_t; * buffer for groups * * The source is a proper kernel cred_t. * */ static size_t copy_cred(cred_t *src, dl_cred_t *dst) { int n; const gid_t *sgrp = crgetgroups(src); n = MIN(NGROUPS_MAX_DEFAULT, crgetngroups(src)); /* copy the fixed fields */ dst->cr_uid = crgetuid(src); dst->cr_ruid = crgetruid(src); dst->cr_suid = crgetsuid(src); dst->cr_gid = crgetgid(src); dst->cr_rgid = crgetrgid(src); dst->cr_sgid = crgetsgid(src); dst->cr_groups[0] = sgrp[0]; dst->cr_ngroups = n; bcopy(sgrp, (void *)(dst + 1), (n - 1) * sizeof (gid_t)); return (sizeof (dl_cred_t) + (n - 1) * sizeof (gid_t)); } /* * Sets up for writing to the log files. */ int cachefs_dlog_setup(fscache_t *fscp, int createfile) { struct vattr vattr; int error = 0; int createdone = 0; int lookupdone = 0; int version = CFS_DLOG_VERSION; off_t offset; struct cfs_dlog_trailer trailer; mutex_enter(&fscp->fs_dlock); /* all done if the log files already exist */ if (fscp->fs_dlogfile) { ASSERT(fscp->fs_dmapfile); goto out; } /* see if the log file exists */ error = VOP_LOOKUP(fscp->fs_fscdirvp, CACHEFS_DLOG_FILE, &fscp->fs_dlogfile, NULL, 0, NULL, kcred, NULL, NULL, NULL); if (error && (createfile == 0)) goto out; /* if the lookup failed then create file log files */ if (error) { createdone++; vattr.va_mode = S_IFREG | 0666; vattr.va_uid = 0; vattr.va_gid = 0; vattr.va_type = VREG; vattr.va_mask = AT_TYPE|AT_MODE|AT_UID|AT_GID; error = VOP_CREATE(fscp->fs_fscdirvp, CACHEFS_DLOG_FILE, &vattr, 0, 0666, &fscp->fs_dlogfile, kcred, 0, NULL, NULL); if (error) { #ifdef CFSDEBUG CFS_DEBUG(CFSDEBUG_DLOG) printf("cachefs: log file create fail %d\n", error); #endif goto out; } /* write the version number into the log file */ error = vn_rdwr(UIO_WRITE, fscp->fs_dlogfile, (caddr_t)&version, sizeof (version), (offset_t)0, UIO_SYSSPACE, FSYNC, RLIM_INFINITY, kcred, NULL); if (error) { #ifdef CFSDEBUG CFS_DEBUG(CFSDEBUG_DLOG) printf("cachefs: log file init fail %d\n", error); #endif goto out; } vattr.va_mode = S_IFREG | 0666; vattr.va_uid = 0; vattr.va_gid = 0; vattr.va_type = VREG; vattr.va_mask = AT_TYPE|AT_MODE|AT_UID|AT_GID; error = VOP_CREATE(fscp->fs_fscdirvp, CACHEFS_DMAP_FILE, &vattr, 0, 0666, &fscp->fs_dmapfile, kcred, 0, NULL, NULL); if (error) { #ifdef CFSDEBUG CFS_DEBUG(CFSDEBUG_DLOG) printf("cachefs: map file create fail %d\n", error); #endif goto out; } fscp->fs_dlogoff = sizeof (version); fscp->fs_dlogseq = 0; fscp->fs_dmapoff = 0; fscp->fs_dmapsize = 0; } /* * Else the lookup succeeded. * Before mounting, fsck should have fixed any problems * in the log file. */ else { lookupdone++; /* find the end of the log file */ vattr.va_mask = AT_ALL; error = VOP_GETATTR(fscp->fs_dlogfile, &vattr, 0, kcred, NULL); if (error) { #ifdef CFSDEBUG CFS_DEBUG(CFSDEBUG_DLOG) printf("cachefs: log file getattr fail %d\n", error); #endif goto out; } /*LINTED alignment okay*/ ASSERT(vattr.va_size <= MAXOFF_T); fscp->fs_dlogoff = (off_t)vattr.va_size; offset = vattr.va_size - sizeof (struct cfs_dlog_trailer); /* * The last record in the dlog file is a trailer record * that contains the last sequence number used. This is * used to reset the sequence number when a logfile already * exists. */ error = vn_rdwr(UIO_READ, fscp->fs_dlogfile, (caddr_t)&trailer, sizeof (struct cfs_dlog_trailer), (offset_t)offset, UIO_SYSSPACE, FSYNC, RLIM_INFINITY, kcred, NULL); if (error == 0) { if (trailer.dl_op == CFS_DLOG_TRAILER) { fscp->fs_dlogseq = trailer.dl_seq; /* * Set the offset of the next record to be * written, to over write the current * trailer. */ fscp->fs_dlogoff = offset; } else { #ifdef CFSDEBUG CFS_DEBUG(CFSDEBUG_DLOG) { cmn_err(CE_WARN, "cachefs: can't find dlog trailer"); cmn_err(CE_WARN, "cachefs: fsck required"); } #endif /* CFSDEBUG */ /*LINTED alignment okay*/ fscp->fs_dlogseq = (uint_t)vattr.va_size; } } else { #ifdef CFSDEBUG CFS_DEBUG(CFSDEBUG_DLOG) cmn_err(CE_WARN, "cachefs: error reading dlog trailer"); #endif /* CFSDEBUG */ /*LINTED alignment okay*/ fscp->fs_dlogseq = (uint_t)vattr.va_size; } error = VOP_LOOKUP(fscp->fs_fscdirvp, CACHEFS_DMAP_FILE, &fscp->fs_dmapfile, NULL, 0, NULL, kcred, NULL, NULL, NULL); if (error) { #ifdef CFSDEBUG CFS_DEBUG(CFSDEBUG_DLOG) printf("cachefs: map file lookup fail %d\n", error); #endif goto out; } vattr.va_mask = AT_ALL; error = VOP_GETATTR(fscp->fs_dmapfile, &vattr, 0, kcred, NULL); if (error) { #ifdef CFSDEBUG CFS_DEBUG(CFSDEBUG_DLOG) printf("cachefs: map file getattr fail %d\n", error); #endif goto out; } fscp->fs_dmapoff = (off_t)vattr.va_size; fscp->fs_dmapsize = (off_t)vattr.va_size; } out: if (error) { if (createdone) { if (fscp->fs_dlogfile) { VN_RELE(fscp->fs_dlogfile); fscp->fs_dlogfile = NULL; (void) VOP_REMOVE(fscp->fs_fscdirvp, CACHEFS_DLOG_FILE, kcred, NULL, 0); } if (fscp->fs_dmapfile) { VN_RELE(fscp->fs_dmapfile); fscp->fs_dmapfile = NULL; (void) VOP_REMOVE(fscp->fs_fscdirvp, CACHEFS_DMAP_FILE, kcred, NULL, 0); } } if (lookupdone) { if (fscp->fs_dlogfile) { VN_RELE(fscp->fs_dlogfile); fscp->fs_dlogfile = NULL; } if (fscp->fs_dmapfile) { VN_RELE(fscp->fs_dmapfile); fscp->fs_dmapfile = NULL; } } } mutex_exit(&fscp->fs_dlock); return (error); } /* * Drops reference to the log file. */ void cachefs_dlog_teardown(fscache_t *fscp) { vattr_t va; /*LINTED: set but not used */ int error; mutex_enter(&fscp->fs_dlock); /* clean up the log file */ if (fscp->fs_dlogfile) { VN_RELE(fscp->fs_dlogfile); fscp->fs_dlogfile = NULL; } /* clean up the map file */ if (fscp->fs_dmapfile) { /* set the map file to the actual size needed */ va.va_mask = AT_SIZE; va.va_size = fscp->fs_dmapoff; error = VOP_SETATTR(fscp->fs_dmapfile, &va, 0, kcred, NULL); #ifdef CFSDEBUG if (error) { cmn_err(CE_WARN, "cachefs: map setattr failed %d", error); } #endif VN_RELE(fscp->fs_dmapfile); fscp->fs_dmapfile = NULL; } mutex_exit(&fscp->fs_dlock); } /* * Outputs a dlog message to the log file. */ static off_t cachefs_dlog_output(fscache_t *fscp, cfs_dlog_entry_t *entp, uint_t *seqp) { int error; off_t offset; int xx; uint_t seq; int len; struct cfs_dlog_trailer *trail; ASSERT(entp->dl_len <= CFS_DLOG_ENTRY_MAXSIZE); if (fscp->fs_dlogfile == NULL) { error = cachefs_dlog_setup(fscp, 1); if (error) { offset = 0; goto out; } } /* round up length to a 4 byte boundary */ len = entp->dl_len; xx = len & 0x03; if (xx) { xx = 4 - xx; bzero((void *)((uintptr_t)entp + len), (size_t)xx); len += xx; entp->dl_len = len; } /* XXX turn this on/off in sync with code in cachefs_dlog_setsecattr */ #if 0 /* XXX debugging hack, round up to 16 byte boundary */ len = entp->dl_len; xx = 16 - (len & 0x0f); bcopy("UUUUUUUUUUUUUUUU", (void *)((uintptr_t)entp + len), (size_t)xx); len += xx; entp->dl_len = len; #endif /* * All functions which allocate a dlog entry buffer must be sure * to allocate space for the trailer record. The trailer record, * is always located at the end of the log file. It contains the * highest sequence number used. This allows cachefs_dlog_setup() * to reset the sequence numbers properly when the log file * already exists. */ trail = (struct cfs_dlog_trailer *)((uintptr_t)entp + entp->dl_len); trail->dl_len = sizeof (struct cfs_dlog_trailer); trail->dl_op = CFS_DLOG_TRAILER; trail->dl_valid = CFS_DLOG_VAL_COMMITTED; mutex_enter(&fscp->fs_dlock); ASSERT(fscp->fs_dlogfile); /* get a sequence number for this log entry */ seq = fscp->fs_dlogseq + 1; if (seq == 0) { mutex_exit(&fscp->fs_dlock); offset = 0; #ifdef CFSDEBUG cmn_err(CE_WARN, "cachefs: logging failed, seq overflow"); #endif goto out; } fscp->fs_dlogseq++; trail->dl_seq = fscp->fs_dlogseq; /* add the sequence number to the record */ entp->dl_seq = seq; /* get offset into file to write record */ offset = fscp->fs_dlogoff; /* try to write the record to the log file */ /* * NOTE This write will over write the previous trailer record and * will add a new trailer record. This is done with a single * write for performance reasons. */ error = vn_rdwr(UIO_WRITE, fscp->fs_dlogfile, (caddr_t)entp, entp->dl_len+trail->dl_len, (offset_t)offset, UIO_SYSSPACE, FSYNC, RLIM_INFINITY, kcred, NULL); if (error) { offset = 0; cmn_err(CE_WARN, "cachefs: logging failed (%d)", error); } else { fscp->fs_dlogoff += entp->dl_len; /* get offset of valid field */ offset += offsetof(struct cfs_dlog_entry, dl_valid); } mutex_exit(&fscp->fs_dlock); /* return sequence number used if requested */ if (seqp) *seqp = seq; out: return (offset); } /* * Commits a previously written dlog message. */ int cachefs_dlog_commit(fscache_t *fscp, off_t offset, int error) { cfs_dlog_val_t valid; if (error) valid = CFS_DLOG_VAL_ERROR; else valid = CFS_DLOG_VAL_COMMITTED; error = vn_rdwr(UIO_WRITE, fscp->fs_dlogfile, (caddr_t)&valid, sizeof (valid), (offset_t)offset, UIO_SYSSPACE, FSYNC, RLIM_INFINITY, kcred, NULL); if (error) cmn_err(CE_WARN, "cachefs: logging commit failed (%d)", error); return (error); } /* * Reserves space in the map file. */ static int cachefs_dlog_mapreserve(fscache_t *fscp, int size) { int error = 0; int len; char *bufp; if (fscp->fs_dmapfile == NULL) { error = cachefs_dlog_setup(fscp, 1); if (error) { return (error); } } mutex_enter(&fscp->fs_dlock); ASSERT(fscp->fs_dmapoff <= fscp->fs_dmapsize); ASSERT(fscp->fs_dmapfile); if ((fscp->fs_dmapoff + size) > fscp->fs_dmapsize) { /* reserve 20% for optimal hashing */ size += MAXBSIZE / 5; /* grow file by a MAXBSIZE chunk */ len = MAXBSIZE; ASSERT((fscp->fs_dmapoff + size) < (fscp->fs_dmapsize + len)); bufp = cachefs_kmem_zalloc(len, KM_SLEEP); error = vn_rdwr(UIO_WRITE, fscp->fs_dmapfile, (caddr_t)bufp, len, (offset_t)fscp->fs_dmapsize, UIO_SYSSPACE, FSYNC, RLIM_INFINITY, kcred, NULL); if (error == 0) { fscp->fs_dmapoff += size; fscp->fs_dmapsize += len; } else { cmn_err(CE_WARN, "cachefs: logging secondary " "failed (%d)", error); } cachefs_kmem_free(bufp, len); } else { fscp->fs_dmapoff += size; } mutex_exit(&fscp->fs_dlock); return (error); } /* * Reserves space for one cid mapping in the mapping file. */ int cachefs_dlog_cidmap(fscache_t *fscp) { int error; error = cachefs_dlog_mapreserve(fscp, sizeof (struct cfs_dlog_mapping_space)); return (error); } off_t cachefs_dlog_setattr(fscache_t *fscp, struct vattr *vap, int flags, cnode_t *cp, cred_t *cr) { struct cfs_dlog_entry *entp; struct cfs_dlog_setattr *up; size_t len; off_t offset; ASSERT(MUTEX_HELD(&cp->c_statelock)); entp = cachefs_kmem_alloc(sizeof (cfs_dlog_entry_t), KM_SLEEP); entp->dl_valid = CFS_DLOG_VAL_CRASH; entp->dl_op = CFS_DLOG_SETATTR; up = &entp->dl_u.dl_setattr; CACHEFS_DLOG_VATTR_COPY(vap, &up->dl_attrs, "cachefs_dlog_setattr: dl_attr"); up->dl_flags = flags; up->dl_cid = cp->c_id; CACHEFS_DLOG_TS_COPY(&cp->c_metadata.md_vattr.va_mtime, &up->dl_times.tm_mtime, "cachefs_dlog_setattr: ", "mtime"); CACHEFS_DLOG_TS_COPY(&cp->c_metadata.md_vattr.va_ctime, &up->dl_times.tm_ctime, "cachefs_dlog_setattr: ", "ctime"); /* store the cred info */ len = copy_cred(cr, &up->dl_cred); /* Calculate the length of this record */ entp->dl_len = (int)(((uintptr_t)&up->dl_cred + len) - (uintptr_t)entp); /* write the record in the log */ offset = cachefs_dlog_output(fscp, entp, NULL); cachefs_kmem_free(entp, sizeof (cfs_dlog_entry_t)); return (offset); } off_t /*ARGSUSED*/ cachefs_dlog_setsecattr(fscache_t *fscp, vsecattr_t *vsec, int flags, cnode_t *cp, cred_t *cr) { struct cfs_dlog_entry *entp; struct cfs_dlog_setsecattr *up; size_t alen, clen, len; off_t offset = 0; aclent_t *aclp; ASSERT(MUTEX_HELD(&cp->c_statelock)); /* paranoia */ ASSERT((vsec->vsa_mask & VSA_ACL) || (vsec->vsa_aclcnt == 0)); ASSERT((vsec->vsa_mask & VSA_DFACL) || (vsec->vsa_dfaclcnt == 0)); if ((vsec->vsa_mask & VSA_ACL) == 0) vsec->vsa_aclcnt = 0; if ((vsec->vsa_mask & VSA_DFACL) == 0) vsec->vsa_dfaclcnt = 0; /* calculate length of ACL and cred data */ alen = sizeof (aclent_t) * (vsec->vsa_aclcnt + vsec->vsa_dfaclcnt); clen = sizeof (dl_cred_t) + (((long)crgetngroups(cr)) * sizeof (gid_t)); /* * allocate entry. ACLs may be up to 24k currently, but they * usually won't, so we don't want to make cfs_dlog_entry_t * too big. so, we must compute the length here. */ len = sizeof (cfs_dlog_entry_t) - sizeof (up->dl_buffer) - sizeof (up->dl_cred) + alen + clen; #if 0 /* make up for weird behavior in cachefs_dlog_output */ /* XXX turn this on/off in sync with code in cachefs_dlog_output */ entp = cachefs_kmem_alloc(len + 32 + sizeof (struct cfs_dlog_trailer), KM_SLEEP); #else entp = cachefs_kmem_alloc(len, KM_SLEEP); #endif entp->dl_valid = CFS_DLOG_VAL_CRASH; entp->dl_op = CFS_DLOG_SETSECATTR; up = &entp->dl_u.dl_setsecattr; up->dl_cid = cp->c_id; CACHEFS_DLOG_TS_COPY(&cp->c_metadata.md_vattr.va_mtime, &up->dl_times.tm_mtime, "cachefs_dlog_setsecattr: ", "mtime"); CACHEFS_DLOG_TS_COPY(&cp->c_metadata.md_vattr.va_ctime, &up->dl_times.tm_ctime, "cachefs_dlog_setsecattr: ", "ctime"); /* get the creds */ (void) copy_cred(cr, &up->dl_cred); /* mask and counts */ up->dl_mask = vsec->vsa_mask; up->dl_aclcnt = vsec->vsa_aclcnt; up->dl_dfaclcnt = vsec->vsa_dfaclcnt; /* get the acls themselves */ aclp = (aclent_t *)((uintptr_t)(&up->dl_cred) + clen); if (vsec->vsa_aclcnt > 0) { bcopy(vsec->vsa_aclentp, aclp, vsec->vsa_aclcnt * sizeof (aclent_t)); aclp += vsec->vsa_aclcnt; } if (vsec->vsa_dfaclcnt > 0) { bcopy(vsec->vsa_dfaclentp, aclp, vsec->vsa_dfaclcnt * sizeof (aclent_t)); } entp->dl_len = (int)len; offset = cachefs_dlog_output(fscp, entp, NULL); #if 0 /* XXX turn on/off in sync with code in cachefs_dlog_output */ cachefs_kmem_free(entp, len + 32 + sizeof (struct cfs_dlog_trailer)); #else cachefs_kmem_free(entp, len); #endif return (offset); } off_t cachefs_dlog_create(fscache_t *fscp, cnode_t *pcp, char *nm, vattr_t *vap, int excl, int mode, cnode_t *cp, int exists, cred_t *cr) { struct cfs_dlog_entry *entp; struct cfs_dlog_create *up; size_t len; caddr_t curp; off_t offset; ASSERT(MUTEX_HELD(&cp->c_statelock)); entp = cachefs_kmem_alloc(sizeof (cfs_dlog_entry_t), KM_SLEEP); entp->dl_valid = CFS_DLOG_VAL_CRASH; entp->dl_op = CFS_DLOG_CREATE; up = &entp->dl_u.dl_create; up->dl_parent_cid = pcp->c_id; up->dl_new_cid = cp->c_id; CACHEFS_DLOG_VATTR_COPY(vap, &up->dl_attrs, "cachefs_dlog_create: dl_attr"); up->dl_excl = excl; up->dl_mode = mode; up->dl_exists = exists; bzero(&up->dl_fid, sizeof (up->dl_fid)); if (exists) { CACHEFS_DLOG_TS_COPY(&cp->c_metadata.md_vattr.va_mtime, &up->dl_times.tm_mtime, "cachefs_dlog_create: ", "mtime"); CACHEFS_DLOG_TS_COPY(&cp->c_metadata.md_vattr.va_ctime, &up->dl_times.tm_ctime, "cachefs_dlog_create: ", "ctime"); } else { up->dl_times.tm_ctime.tv_sec = 0; up->dl_times.tm_ctime.tv_nsec = 0; up->dl_times.tm_mtime.tv_sec = 0; up->dl_times.tm_mtime.tv_nsec = 0; } /* store the cred info */ len = copy_cred(cr, &up->dl_cred); /* find the address in buffer past where the creds are stored */ curp = (caddr_t)(((uintptr_t)&up->dl_cred) + len); /* store the created name */ len = strlen(nm) + 1; bcopy(nm, curp, len); /* calculate the length of this record */ entp->dl_len = (int)(((uintptr_t)curp + len) - (uintptr_t)entp); /* write the record in the log */ offset = cachefs_dlog_output(fscp, entp, NULL); cachefs_kmem_free(entp, sizeof (cfs_dlog_entry_t)); return (offset); } off_t cachefs_dlog_remove(fscache_t *fscp, cnode_t *pcp, char *nm, cnode_t *cp, cred_t *cr) { struct cfs_dlog_entry *entp; struct cfs_dlog_remove *up; size_t len; caddr_t curp; off_t offset; entp = cachefs_kmem_alloc(sizeof (cfs_dlog_entry_t), KM_SLEEP); entp->dl_valid = CFS_DLOG_VAL_CRASH; entp->dl_op = CFS_DLOG_REMOVE; up = &entp->dl_u.dl_remove; up->dl_parent_cid = pcp->c_id; up->dl_child_cid = cp->c_id; CACHEFS_DLOG_TS_COPY(&cp->c_metadata.md_vattr.va_mtime, &up->dl_times.tm_mtime, "cachefs_dlog_remove: ", "mtime"); CACHEFS_DLOG_TS_COPY(&cp->c_metadata.md_vattr.va_ctime, &up->dl_times.tm_ctime, "cachefs_dlog_remove: ", "ctime"); /* store the cred info */ len = copy_cred(cr, &up->dl_cred); /* find the address in buffer past where the creds are stored */ curp = (caddr_t)(((uintptr_t)&up->dl_cred) + len); /* store the removed name */ len = strlen(nm) + 1; bcopy(nm, curp, len); /* calculate the length of this record */ entp->dl_len = (int)(((uintptr_t)curp + len) - (uintptr_t)entp); /* write the record in the log */ offset = cachefs_dlog_output(fscp, entp, NULL); cachefs_kmem_free(entp, sizeof (cfs_dlog_entry_t)); return (offset); } off_t cachefs_dlog_link(fscache_t *fscp, cnode_t *pcp, char *nm, cnode_t *cp, cred_t *cr) { struct cfs_dlog_entry *entp; struct cfs_dlog_link *up; size_t len; caddr_t curp; off_t offset; entp = cachefs_kmem_alloc(sizeof (cfs_dlog_entry_t), KM_SLEEP); entp->dl_valid = CFS_DLOG_VAL_CRASH; entp->dl_op = CFS_DLOG_LINK; up = &entp->dl_u.dl_link; up->dl_parent_cid = pcp->c_id; up->dl_child_cid = cp->c_id; CACHEFS_DLOG_TS_COPY(&cp->c_metadata.md_vattr.va_mtime, &up->dl_times.tm_mtime, "cachefs_dlog_link: ", "mtime"); CACHEFS_DLOG_TS_COPY(&cp->c_metadata.md_vattr.va_ctime, &up->dl_times.tm_ctime, "cachefs_dlog_link: ", "ctime"); /* store the cred info */ len = copy_cred(cr, &up->dl_cred); /* find the address in buffer past where the creds are stored */ curp = (caddr_t)(((uintptr_t)&up->dl_cred) + len); /* store the link name */ len = strlen(nm) + 1; bcopy(nm, curp, len); /* calculate the length of this record */ entp->dl_len = (int)(((uintptr_t)curp + len) - (uintptr_t)entp); /* write the record in the log */ offset = cachefs_dlog_output(fscp, entp, NULL); cachefs_kmem_free(entp, sizeof (cfs_dlog_entry_t)); return (offset); } off_t cachefs_dlog_rename(fscache_t *fscp, cnode_t *odcp, char *onm, cnode_t *ndcp, char *nnm, cred_t *cr, cnode_t *cp, cnode_t *delcp) { struct cfs_dlog_entry *entp; struct cfs_dlog_rename *up; size_t len; caddr_t curp; off_t offset; entp = cachefs_kmem_alloc(sizeof (cfs_dlog_entry_t), KM_SLEEP); entp->dl_valid = CFS_DLOG_VAL_CRASH; entp->dl_op = CFS_DLOG_RENAME; up = &entp->dl_u.dl_rename; up->dl_oparent_cid = odcp->c_id; up->dl_nparent_cid = ndcp->c_id; up->dl_child_cid = cp->c_id; CACHEFS_DLOG_TS_COPY(&cp->c_metadata.md_vattr.va_mtime, &up->dl_times.tm_mtime, "cachefs_dlog_rename: ", "mtime"); CACHEFS_DLOG_TS_COPY(&cp->c_metadata.md_vattr.va_ctime, &up->dl_times.tm_ctime, "cachefs_dlog_rename: ", "ctime"); if (delcp) { up->dl_del_cid = delcp->c_id; CACHEFS_DLOG_TS_COPY(&delcp->c_metadata.md_vattr.va_mtime, &up->dl_del_times.tm_mtime, "cachefs_dlog_rename: ", "del mtime"); CACHEFS_DLOG_TS_COPY(&delcp->c_metadata.md_vattr.va_ctime, &up->dl_del_times.tm_ctime, "cachefs_dlog_rename: ", "del ctime"); } else { up->dl_del_cid.cid_fileno = 0; up->dl_del_cid.cid_flags = 0; up->dl_del_times.tm_mtime.tv_sec = 0; up->dl_del_times.tm_mtime.tv_nsec = 0; up->dl_del_times.tm_ctime.tv_sec = 0; up->dl_del_times.tm_ctime.tv_nsec = 0; } /* store the cred info */ len = copy_cred(cr, &up->dl_cred); /* find the address in buffer past where the creds are stored */ curp = (caddr_t)(((uintptr_t)&up->dl_cred) + len); /* store the old name */ len = strlen(onm) + 1; bcopy(onm, curp, len); /* store the new name */ curp += len; len = strlen(nnm) + 1; bcopy(nnm, curp, len); /* calculate the length of this record */ entp->dl_len = (int)(((uintptr_t)curp + len) - (uintptr_t)entp); /* write the record in the log */ offset = cachefs_dlog_output(fscp, entp, NULL); cachefs_kmem_free(entp, sizeof (cfs_dlog_entry_t)); return (offset); } off_t cachefs_dlog_mkdir(fscache_t *fscp, cnode_t *pcp, cnode_t *cp, char *nm, vattr_t *vap, cred_t *cr) { struct cfs_dlog_entry *entp; struct cfs_dlog_mkdir *up; size_t len; caddr_t curp; off_t offset; entp = cachefs_kmem_alloc(sizeof (cfs_dlog_entry_t), KM_SLEEP); entp->dl_valid = CFS_DLOG_VAL_CRASH; entp->dl_op = CFS_DLOG_MKDIR; up = &entp->dl_u.dl_mkdir; up->dl_parent_cid = pcp->c_id; up->dl_child_cid = cp->c_id; CACHEFS_DLOG_VATTR_COPY(vap, &up->dl_attrs, "cachefs_dlog_mkdir: dl_attr"); bzero(&up->dl_fid, sizeof (up->dl_fid)); /* store the cred info */ len = copy_cred(cr, &up->dl_cred); /* find the address in buffer past where the creds are stored */ curp = (caddr_t)(((uintptr_t)&up->dl_cred) + len); /* store the new directory name */ len = strlen(nm) + 1; bcopy(nm, curp, len); /* calculate the length of this record */ entp->dl_len = (int)(((uintptr_t)curp + len) - (uintptr_t)entp); /* write the record in the dlog */ offset = cachefs_dlog_output(fscp, entp, NULL); cachefs_kmem_free(entp, sizeof (cfs_dlog_entry_t)); return (offset); } off_t cachefs_dlog_rmdir(fscache_t *fscp, cnode_t *pcp, char *nm, cnode_t *cp, cred_t *cr) { struct cfs_dlog_entry *entp; struct cfs_dlog_rmdir *up; size_t len; caddr_t curp; off_t offset; /* if not a local dir, log the cid to fid mapping */ if ((cp->c_id.cid_flags & CFS_CID_LOCAL) == 0) { if (cachefs_dlog_mapfid(fscp, cp)) return (0); if (cachefs_dlog_cidmap(fscp)) return (0); } entp = cachefs_kmem_alloc(sizeof (cfs_dlog_entry_t), KM_SLEEP); entp->dl_valid = CFS_DLOG_VAL_CRASH; entp->dl_op = CFS_DLOG_RMDIR; up = &entp->dl_u.dl_rmdir; up->dl_parent_cid = pcp->c_id; /* store the cred info */ len = copy_cred(cr, &up->dl_cred); /* find the address in buffer past where the creds are stored */ curp = (caddr_t)(((uintptr_t)&up->dl_cred) + len); /* store the created name */ len = strlen(nm) + 1; bcopy(nm, curp, len); /* calculate the length of this record */ entp->dl_len = (int)(((uintptr_t)curp + len) - (uintptr_t)entp); /* write the record in the log */ offset = cachefs_dlog_output(fscp, entp, NULL); cachefs_kmem_free(entp, sizeof (cfs_dlog_entry_t)); return (offset); } off_t cachefs_dlog_symlink(fscache_t *fscp, cnode_t *pcp, cnode_t *cp, char *lnm, vattr_t *vap, char *tnm, cred_t *cr) { struct cfs_dlog_entry *entp; struct cfs_dlog_symlink *up; size_t len; caddr_t curp; off_t offset; ASSERT(MUTEX_HELD(&cp->c_statelock)); entp = cachefs_kmem_alloc(sizeof (cfs_dlog_entry_t), KM_SLEEP); entp->dl_valid = CFS_DLOG_VAL_CRASH; entp->dl_op = CFS_DLOG_SYMLINK; up = &entp->dl_u.dl_symlink; up->dl_parent_cid = pcp->c_id; up->dl_child_cid = cp->c_id; CACHEFS_DLOG_VATTR_COPY(vap, &up->dl_attrs, "cachefs_dlog_symlink: dl_attr"); up->dl_times.tm_ctime.tv_sec = 0; up->dl_times.tm_ctime.tv_nsec = 0; up->dl_times.tm_mtime.tv_sec = 0; up->dl_times.tm_mtime.tv_nsec = 0; bzero(&up->dl_fid, sizeof (up->dl_fid)); /* store the cred info */ len = copy_cred(cr, &up->dl_cred); /* find the address in buffer past where the creds are stored */ curp = (caddr_t)(((uintptr_t)&up->dl_cred) + len); /* store the link name */ len = strlen(lnm) + 1; bcopy(lnm, curp, len); /* store new name */ curp += len; len = strlen(tnm) + 1; bcopy(tnm, curp, len); /* calculate the length of this record */ entp->dl_len = (int)(((uintptr_t)curp + len) - (uintptr_t)entp); /* write the record in the log */ offset = cachefs_dlog_output(fscp, entp, NULL); cachefs_kmem_free(entp, sizeof (cfs_dlog_entry_t)); return (offset); } off_t cachefs_dlog_modify(fscache_t *fscp, cnode_t *cp, cred_t *cr, uint_t *seqp) { struct cfs_dlog_entry *entp; struct cfs_dlog_modify *up; off_t offset; uint_t seq; size_t len; entp = cachefs_kmem_alloc(sizeof (cfs_dlog_entry_t), KM_SLEEP); entp->dl_valid = CFS_DLOG_VAL_CRASH; entp->dl_op = CFS_DLOG_MODIFIED; up = &entp->dl_u.dl_modify; up->dl_cid = cp->c_id; CACHEFS_DLOG_TS_COPY(&cp->c_metadata.md_vattr.va_mtime, &up->dl_times.tm_mtime, "cachefs_dlog_modify: ", "mtime"); CACHEFS_DLOG_TS_COPY(&cp->c_metadata.md_vattr.va_ctime, &up->dl_times.tm_ctime, "cachefs_dlog_modify: ", "ctime"); up->dl_next = 0; /* store the cred info */ len = copy_cred(cr, &up->dl_cred); /* calculate the length of this record */ entp->dl_len = (int)(((uintptr_t)&up->dl_cred + len) - (uintptr_t)entp); /* write the record in the log */ offset = cachefs_dlog_output(fscp, entp, &seq); /* return sequence number */ *seqp = seq; cachefs_kmem_free(entp, sizeof (cfs_dlog_entry_t)); return (offset); } int cachefs_dlog_mapfid(fscache_t *fscp, cnode_t *cp) { struct cfs_dlog_entry *entp; struct cfs_dlog_mapfid *up; off_t offset; entp = cachefs_kmem_alloc(sizeof (cfs_dlog_entry_t), KM_SLEEP); entp->dl_valid = CFS_DLOG_VAL_COMMITTED; entp->dl_op = CFS_DLOG_MAPFID; up = &entp->dl_u.dl_mapfid; up->dl_cid = cp->c_id; CACHEFS_FID_COPY(&cp->c_cookie, &up->dl_fid); /* calculate the length of this record */ /* entp->dl_len = ((caddr_t)up - (caddr_t)entp + sizeof (*up)); */ entp->dl_len = (int)(offsetof(struct cfs_dlog_entry, dl_u.dl_mapfid) + sizeof (struct cfs_dlog_mapfid)); /* write the record in the log */ offset = cachefs_dlog_output(fscp, entp, NULL); cachefs_kmem_free(entp, sizeof (cfs_dlog_entry_t)); return (offset == 0); } /* Returns the next sequence number, 0 if an error */ uint_t cachefs_dlog_seqnext(fscache_t *fscp) { int error; uint_t seq; if (fscp->fs_dlogfile == NULL) { error = cachefs_dlog_setup(fscp, 1); if (error) return (0); } mutex_enter(&fscp->fs_dlock); ASSERT(fscp->fs_dlogfile); /* get a sequence number for this log entry */ seq = fscp->fs_dlogseq + 1; if (seq != 0) { fscp->fs_dlogseq++; } #ifdef CFSDEBUG else { cmn_err(CE_WARN, "cachefs: logging failed, seq overflow 2."); } #endif mutex_exit(&fscp->fs_dlock); return (seq); }