/* * 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 2008 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. * Copyright 2015 Joyent, Inc. * Copyright 2024 MNX Cloud, Inc. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static int pc_makedirentry(struct pcnode *dp, struct pcdir *direntries, int ndirentries, struct vattr *vap, offset_t offset); static int pc_dirempty(struct pcnode *); static int pc_findentry(struct pcnode *, char *, struct pcslot *, offset_t *); static int pc_parsename(char *, char *, char *); static int pc_remove_long_fn(struct pcnode *pcp, offset_t lfn_offset); static int generate_short_name(struct pcnode *dp, char *namep, struct pcdir *ep); static struct pcdir *pc_name_to_pcdir(struct pcnode *dp, char *namep, int ndirentries, int *errret); static offset_t pc_find_free_space(struct pcnode *pcp, int ndirentries); static int direntries_needed(struct pcnode *dp, char *namep); static int pc_is_short_file_name(char *namep, int foldcase); static int shortname_exists(struct pcnode *dp, char *fname, char *fext); static int pc_dirfixdotdot(struct pcnode *cdp, struct pcnode *opdp, struct pcnode *npdp); /* * Tunables */ int enable_long_filenames = 1; /* * Lookup a name in a directory. Return a pointer to the pc_node * which represents the entry. */ int pc_dirlook( struct pcnode *dp, /* parent directory */ char *namep, /* name to lookup */ struct pcnode **pcpp) /* result */ { struct vnode *vp; struct pcslot slot; int error; PC_DPRINTF2(4, "pc_dirlook (dp %p name %s)\n", (void *)dp, namep); if (!(dp->pc_entry.pcd_attr & PCA_DIR)) { return (ENOTDIR); } vp = PCTOV(dp); /* * check now for changed disk, before any return(0) */ if (error = pc_verify(VFSTOPCFS(vp->v_vfsp))) return (error); /* * Null component name is synonym for directory being searched. */ if (*namep == '\0') { VN_HOLD(vp); *pcpp = dp; return (0); } /* * The root directory does not have "." and ".." entries, * so they are faked here. */ if (vp->v_flag & VROOT) { if (bcmp(namep, ".", 2) == 0 || bcmp(namep, "..", 3) == 0) { VN_HOLD(vp); *pcpp = dp; return (0); } } error = pc_findentry(dp, namep, &slot, NULL); if (error == 0) { *pcpp = pc_getnode(VFSTOPCFS(vp->v_vfsp), slot.sl_blkno, slot.sl_offset, slot.sl_ep); brelse(slot.sl_bp); PC_DPRINTF1(4, "pc_dirlook: FOUND pcp=%p\n", (void *)*pcpp); } else if (error == EINVAL) { error = ENOENT; } return (error); } /* * Enter a name in a directory. */ int pc_direnter( struct pcnode *dp, /* directory to make entry in */ char *namep, /* name of entry */ struct vattr *vap, /* attributes of new entry */ struct pcnode **pcpp) { int error; struct pcslot slot; struct vnode *vp = PCTOV(dp); struct pcfs *fsp = VFSTOPCFS(vp->v_vfsp); offset_t offset; daddr_t blkno; int boff; struct buf *bp = NULL; struct pcdir *ep; PC_DPRINTF4(4, "pc_dirent(dp %p, name %s, vap %p, pcpp %p\n", (void *)dp, namep, (void *)vap, (void *)pcpp); if (pcpp != NULL) *pcpp = NULL; /* * Leading spaces are not allowed in DOS. */ if (*namep == ' ') return (EINVAL); /* * If name is "." or "..", just look it up. */ if (PC_NAME_IS_DOT(namep) || PC_NAME_IS_DOTDOT(namep)) { if (pcpp) { error = pc_dirlook(dp, namep, pcpp); if (error) return (error); } return (EEXIST); } if (PCA_IS_HIDDEN(fsp, dp->pc_entry.pcd_attr)) { return (EPERM); } /* * Make sure directory has not been removed while fs was unlocked. */ if (dp->pc_entry.pcd_filename[0] == PCD_ERASED) { return (ENOENT); } error = pc_findentry(dp, namep, &slot, NULL); if (error == 0) { if (pcpp) { *pcpp = pc_getnode(fsp, slot.sl_blkno, slot.sl_offset, slot.sl_ep); error = EEXIST; } brelse(slot.sl_bp); } else if (error == ENOENT) { struct pcdir *direntries; int ndirentries; /* * The entry does not exist. Check write permission in * directory to see if entry can be created. */ if (dp->pc_entry.pcd_attr & PCA_RDONLY) { return (EPERM); } error = 0; /* * Make sure there is a slot. */ if (slot.sl_status == SL_NONE) panic("pc_direnter: no slot\n"); ndirentries = direntries_needed(dp, namep); if (ndirentries == -1) { return (EINVAL); } offset = pc_find_free_space(dp, ndirentries); if (offset == -1) { return (ENOSPC); } /* * Make an entry from the supplied attributes. */ direntries = pc_name_to_pcdir(dp, namep, ndirentries, &error); if (direntries == NULL) { return (error); } error = pc_makedirentry(dp, direntries, ndirentries, vap, offset); kmem_free(direntries, ndirentries * sizeof (struct pcdir)); if (error) { return (error); } offset += (ndirentries - 1) * sizeof (struct pcdir); boff = pc_blkoff(fsp, offset); error = pc_blkatoff(dp, offset, &bp, &ep); if (error) { return (error); } blkno = pc_daddrdb(fsp, bp->b_blkno); /* * Get a pcnode for the new entry. */ *pcpp = pc_getnode(fsp, blkno, boff, ep); brelse(bp); if (vap->va_type == VDIR) (*pcpp)->pc_size = fsp->pcfs_clsize; /* * Write out the new entry in the parent directory. */ error = pc_syncfat(fsp); if (!error) { error = pc_nodeupdate(*pcpp); } } return (error); } /* * Template for "." and ".." directory entries. */ static struct { struct pcdir t_dot; /* dot entry */ struct pcdir t_dotdot; /* dotdot entry */ } dirtemplate = { { ". ", " ", PCA_DIR }, { ".. ", " ", PCA_DIR } }; /* * Convert an attributes structure into the short filename entry * and write out the whole entry. */ static int pc_makedirentry(struct pcnode *dp, struct pcdir *direntries, int ndirentries, struct vattr *vap, offset_t offset) { struct vnode *vp = PCTOV(dp); struct pcfs *fsp = VFSTOPCFS(vp->v_vfsp); int error; struct pcdir *ep; int boff; int i; struct buf *bp = NULL; timestruc_t now; if (vap != NULL && vap->va_mask & (AT_ATIME|AT_MTIME)) return (EOPNOTSUPP); ep = &direntries[ndirentries - 1]; gethrestime(&now); if (error = pc_tvtopct(&now, &ep->pcd_mtime)) return (error); ep->pcd_crtime = ep->pcd_mtime; ep->pcd_ladate = ep->pcd_mtime.pct_date; ep->pcd_crtime_msec = 0; ep->pcd_size = 0; ep->pcd_attr = 0; /* * Fields we don't use. */ ep->pcd_ntattr = 0; if (!IS_FAT32(fsp)) ep->un.pcd_eattr = 0; if (vap && ((vap->va_mode & 0222) == 0)) ep->pcd_attr |= PCA_RDONLY; if (vap && (vap->va_type == VDIR)) { pc_cluster32_t cn; ep->pcd_attr |= PCA_DIR; /* * Make dot and dotdot entries for a new directory. */ cn = pc_alloccluster(fsp, 0); switch (cn) { case PCF_FREECLUSTER: return (ENOSPC); case PCF_ERRORCLUSTER: return (EIO); } bp = ngeteblk(fsp->pcfs_clsize); bp->b_edev = fsp->pcfs_xdev; bp->b_dev = cmpdev(bp->b_edev); bp->b_blkno = pc_cldaddr(fsp, cn); clrbuf(bp); pc_setstartcluster(fsp, ep, cn); pc_setstartcluster(fsp, &dirtemplate.t_dot, cn); cn = pc_getstartcluster(fsp, &dp->pc_entry); pc_setstartcluster(fsp, &dirtemplate.t_dotdot, cn); dirtemplate.t_dot.pcd_mtime = dirtemplate.t_dotdot.pcd_mtime = ep->pcd_mtime; dirtemplate.t_dot.pcd_crtime = dirtemplate.t_dotdot.pcd_crtime = ep->pcd_crtime; dirtemplate.t_dot.pcd_ladate = dirtemplate.t_dotdot.pcd_ladate = ep->pcd_ladate; dirtemplate.t_dot.pcd_crtime_msec = dirtemplate.t_dotdot.pcd_crtime_msec = 0; bcopy(&dirtemplate, bp->b_un.b_addr, sizeof (dirtemplate)); bwrite2(bp); error = geterror(bp); brelse(bp); if (error) { PC_DPRINTF0(1, "pc_makedirentry error"); pc_mark_irrecov(fsp); return (EIO); } } else { pc_setstartcluster(fsp, ep, 0); } bp = NULL; for (i = 0, ep = NULL; i < ndirentries; i++, ep++) { boff = pc_blkoff(fsp, offset); if (boff == 0 || bp == NULL || boff >= bp->b_bcount) { if (bp != NULL) { /* always modified */ bwrite2(bp); error = geterror(bp); brelse(bp); if (error) return (error); bp = NULL; } error = pc_blkatoff(dp, offset, &bp, &ep); if (error) return (error); } *ep = direntries[i]; offset += sizeof (struct pcdir); } if (bp != NULL) { /* always modified */ bwrite2(bp); error = geterror(bp); brelse(bp); if (error) return (error); } return (0); } /* * Remove a name from a directory. */ int pc_dirremove( struct pcnode *dp, char *namep, struct vnode *cdir, enum vtype type, caller_context_t *ctp) { struct pcslot slot; struct pcnode *pcp; int error; struct vnode *vp = PCTOV(dp); struct pcfs *fsp = VFSTOPCFS(vp->v_vfsp); offset_t lfn_offset = -1; PC_DPRINTF2(4, "pc_dirremove (dp %p name %s)\n", (void *)dp, namep); if ((dp->pc_entry.pcd_attr & PCA_RDONLY) || PCA_IS_HIDDEN(fsp, dp->pc_entry.pcd_attr)) { return (EPERM); } error = pc_findentry(dp, namep, &slot, &lfn_offset); if (error) return (error); if (slot.sl_flags == SL_DOT) { error = EINVAL; } else if (slot.sl_flags == SL_DOTDOT) { error = ENOTEMPTY; } else { pcp = pc_getnode(VFSTOPCFS(vp->v_vfsp), slot.sl_blkno, slot.sl_offset, slot.sl_ep); } if (error) { brelse(slot.sl_bp); return (error); } if (type == VDIR) { if (pcp->pc_entry.pcd_attr & PCA_DIR) { if (PCTOV(pcp) == cdir) error = EINVAL; else if (!pc_dirempty(pcp)) error = ENOTEMPTY; } else { error = ENOTDIR; } } else { if (pcp->pc_entry.pcd_attr & PCA_DIR) error = EISDIR; } if (error == 0) { /* * Mark the in core node and on disk entry * as removed. The slot may then be reused. * The files clusters will be deallocated * when the last reference goes away. */ pcp->pc_eblkno = -1; pcp->pc_entry.pcd_filename[0] = PCD_ERASED; if (lfn_offset != -1) { brelse(slot.sl_bp); error = pc_remove_long_fn(dp, lfn_offset); if (error) { VN_RELE(PCTOV(pcp)); pc_mark_irrecov(VFSTOPCFS(vp->v_vfsp)); return (EIO); } } else { slot.sl_ep->pcd_filename[0] = PCD_ERASED; bwrite2(slot.sl_bp); error = geterror(slot.sl_bp); brelse(slot.sl_bp); } if (error) { VN_RELE(PCTOV(pcp)); pc_mark_irrecov(VFSTOPCFS(vp->v_vfsp)); return (EIO); } else if (type == VDIR) { error = pc_truncate(pcp, 0L); } } else { brelse(slot.sl_bp); } if (error == 0) { if (type == VDIR) { vnevent_rmdir(PCTOV(pcp), vp, namep, ctp); } else { vnevent_remove(PCTOV(pcp), vp, namep, ctp); } } VN_RELE(PCTOV(pcp)); return (error); } /* * Determine whether a directory is empty. */ static int pc_dirempty(struct pcnode *pcp) { struct buf *bp; struct pcdir *ep; offset_t offset; int boff; char c; int error; struct vnode *vp; vp = PCTOV(pcp); bp = NULL; offset = 0; for (;;) { /* * If offset is on a block boundary, * read in the next directory block. * Release previous if it exists. */ boff = pc_blkoff(VFSTOPCFS(vp->v_vfsp), offset); if (boff == 0 || bp == NULL || boff >= bp->b_bcount) { if (bp != NULL) brelse(bp); if (error = pc_blkatoff(pcp, offset, &bp, &ep)) { return (error); } } if (PCDL_IS_LFN(ep)) { error = pc_extract_long_fn(pcp, NULL, &ep, &offset, &bp); /* * EINVAL means the lfn was invalid, so start with * the next entry. Otherwise, an error occurred _or_ * the lfn is valid, either of which means the * directory is not empty. */ if (error == EINVAL) continue; else { if (bp) brelse(bp); return (error); } } c = ep->pcd_filename[0]; if (c == PCD_UNUSED) break; if ((c != '.') && (c != PCD_ERASED)) { brelse(bp); return (0); } if ((c == '.') && !PC_SHORTNAME_IS_DOT(ep->pcd_filename) && !PC_SHORTNAME_IS_DOTDOT(ep->pcd_filename)) { brelse(bp); return (0); } ep++; offset += sizeof (struct pcdir); } if (bp != NULL) brelse(bp); return (1); } /* * Rename a file. */ int pc_rename( struct pcnode *dp, /* parent directory */ struct pcnode *tdp, /* target directory */ char *snm, /* source file name */ char *tnm, /* target file name */ caller_context_t *ctp) { struct pcnode *pcp; /* pcnode we are trying to rename */ struct pcnode *tpcp = NULL; /* pcnode that's in our way */ struct pcslot slot; int error; struct vnode *vp = PCTOV(dp); struct vnode *svp = NULL; struct pcfs *fsp = VFSTOPCFS(vp->v_vfsp); int filecasechange = 0; int oldisdir = 0; PC_DPRINTF3(4, "pc_rename(0x%p, %s, %s)\n", (void *)dp, snm, tnm); /* * Leading spaces are not allowed in DOS. */ if (*tnm == ' ') return (EINVAL); /* * No dot or dotdot. */ if (PC_NAME_IS_DOT(snm) || PC_NAME_IS_DOTDOT(snm) || PC_NAME_IS_DOT(tnm) || PC_NAME_IS_DOTDOT(tnm)) return (EINVAL); /* * Get the source node. We'll jump back to here if trying to * move on top of an existing file, after deleting that file. */ top: error = pc_findentry(dp, snm, &slot, NULL); if (error) { return (error); } pcp = pc_getnode(VFSTOPCFS(vp->v_vfsp), slot.sl_blkno, slot.sl_offset, slot.sl_ep); brelse(slot.sl_bp); if (pcp) svp = PCTOV(pcp); /* * is the rename invalid, i.e. rename("a", "a/a") */ if (pcp == tdp) { if (svp) VN_RELE(svp); return (EINVAL); } /* * Are we just changing the case of an existing name? */ if ((dp->pc_scluster == tdp->pc_scluster) && (u8_strcmp(snm, tnm, 0, U8_STRCMP_CI_UPPER, U8_UNICODE_LATEST, &error) == 0)) { filecasechange = 1; } /* * u8_strcmp detected an illegal character */ if (error) return (EINVAL); oldisdir = pcp->pc_entry.pcd_attr & PCA_DIR; /* * see if the target exists */ error = pc_findentry(tdp, tnm, &slot, NULL); if (error == 0 && filecasechange == 0) { /* * Target exists. If it's a file, delete it. If it's * a directory, bail. */ int newisdir; tpcp = pc_getnode(VFSTOPCFS(vp->v_vfsp), slot.sl_blkno, slot.sl_offset, slot.sl_ep); newisdir = tpcp->pc_entry.pcd_attr & PCA_DIR; brelse(slot.sl_bp); /* * Error cases (from rename(2)): * old is dir, new is dir: EEXIST * old is dir, new is nondir: ENOTDIR * old is nondir, new is dir: EISDIR */ if (!newisdir) { if (oldisdir) { error = ENOTDIR; } else { /* nondir/nondir, remove target */ error = pc_dirremove(tdp, tnm, (struct vnode *)NULL, VREG, ctp); if (error == 0) { vnevent_rename_dest(PCTOV(tpcp), PCTOV(tdp), tnm, ctp); VN_RELE(PCTOV(tpcp)); tpcp = NULL; VN_RELE(PCTOV(pcp)); goto top; } } } else if (oldisdir) { /* dir/dir, remove target */ error = pc_dirremove(tdp, tnm, (struct vnode *)NULL, VDIR, ctp); if (error == 0) { vnevent_rename_dest(PCTOV(tpcp), PCTOV(tdp), tnm, ctp); VN_RELE(PCTOV(tpcp)); tpcp = NULL; VN_RELE(PCTOV(pcp)); goto top; } /* Follow rename(2)'s spec... */ if (error == ENOTEMPTY) { error = EEXIST; } } else { /* nondir/dir, bail */ error = EISDIR; } } if ((error == 0) || (error == ENOENT)) { offset_t lfn_offset = -1; daddr_t blkno; struct pcdir *direntries; struct pcdir *ep; int ndirentries; pc_cluster16_t pct_lo; pc_cluster16_t pct_hi; offset_t offset; int boff; struct buf *bp = NULL; uchar_t attr; int size; struct pctime mtime; struct pctime crtime; uchar_t ntattr; ushort_t ladate; ushort_t eattr; uchar_t crtime_msec; /* * Rename the source. */ /* * Delete the old name, and create a new name. */ if (filecasechange == 1 && error == 0) brelse(slot.sl_bp); ndirentries = direntries_needed(tdp, tnm); if (ndirentries == -1) { error = EINVAL; goto done; } /* * first see if we have enough space to create the new * name before destroying the old one. */ offset = pc_find_free_space(tdp, ndirentries); if (offset == -1) { error = ENOSPC; goto done; } error = pc_findentry(dp, snm, &slot, &lfn_offset); if (error) { goto done; } pct_lo = slot.sl_ep->pcd_scluster_lo; if (IS_FAT32(fsp)) pct_hi = slot.sl_ep->un.pcd_scluster_hi; else eattr = slot.sl_ep->un.pcd_eattr; size = slot.sl_ep->pcd_size; attr = slot.sl_ep->pcd_attr; mtime = slot.sl_ep->pcd_mtime; crtime = slot.sl_ep->pcd_crtime; crtime_msec = slot.sl_ep->pcd_crtime_msec; ntattr = slot.sl_ep->pcd_ntattr; ladate = slot.sl_ep->pcd_ladate; if (lfn_offset != -1) { brelse(slot.sl_bp); error = pc_remove_long_fn(dp, lfn_offset); if (error) { pc_mark_irrecov(VFSTOPCFS(vp->v_vfsp)); goto done; } } else { slot.sl_ep->pcd_filename[0] = pcp->pc_entry.pcd_filename[0] = PCD_ERASED; bwrite2(slot.sl_bp); error = geterror(slot.sl_bp); brelse(slot.sl_bp); } if (error) { pc_mark_irrecov(VFSTOPCFS(vp->v_vfsp)); error = EIO; goto done; } /* * Make an entry from the supplied attributes. */ direntries = pc_name_to_pcdir(tdp, tnm, ndirentries, &error); if (direntries == NULL) { goto done; } error = pc_makedirentry(tdp, direntries, ndirentries, NULL, offset); kmem_free(direntries, ndirentries * sizeof (struct pcdir)); if (error) { goto done; } /* advance to short name */ offset += (ndirentries - 1) * sizeof (struct pcdir); boff = pc_blkoff(fsp, offset); error = pc_blkatoff(tdp, offset, &bp, &ep); if (error) { goto done; } blkno = pc_daddrdb(fsp, bp->b_blkno); ep->pcd_scluster_lo = pct_lo; if (IS_FAT32(fsp)) ep->un.pcd_scluster_hi = pct_hi; else ep->un.pcd_eattr = eattr; ep->pcd_size = size; ep->pcd_attr = attr; ep->pcd_mtime = mtime; ep->pcd_crtime = crtime; ep->pcd_crtime_msec = crtime_msec; ep->pcd_ntattr = ntattr; ep->pcd_ladate = ladate; bwrite2(bp); error = geterror(bp); pcp->pc_eblkno = blkno; pcp->pc_eoffset = boff; pcp->pc_entry = *ep; pcp->pc_flags |= PC_CHG; brelse(bp); if (error) { pc_mark_irrecov(VFSTOPCFS(vp->v_vfsp)); error = EIO; goto done; } /* No need to fix ".." if we're renaming within a dir */ if (oldisdir && dp != tdp) { if ((error = pc_dirfixdotdot(pcp, dp, tdp)) != 0) { goto done; } } if ((error = pc_nodeupdate(pcp)) != 0) { goto done; } } if (error == 0) { vnevent_rename_src(PCTOV(pcp), PCTOV(dp), snm, ctp); if (dp != tdp) vnevent_rename_dest_dir(PCTOV(tdp), ctp); } done: if (tpcp != NULL) VN_RELE(PCTOV(tpcp)); VN_RELE(PCTOV(pcp)); return (error); } /* * Fix the ".." entry of the child directory so that it points to the * new parent directory instead of the old one. */ static int pc_dirfixdotdot(struct pcnode *dp, /* child directory being moved */ struct pcnode *opdp, /* old parent directory */ struct pcnode *npdp) /* new parent directory */ { pc_cluster32_t cn; struct vnode *vp = PCTOV(dp); struct pcfs *fsp = VFSTOPCFS(vp->v_vfsp); int error = 0; struct buf *bp = NULL; struct pcdir *ep = NULL; struct pcdir *tep = NULL; /* * set the new child's ".." directory entry starting cluster to * point to the new parent's starting cluster */ ASSERT(opdp != npdp); error = pc_blkatoff(dp, (offset_t)0, &bp, &ep); if (error) { PC_DPRINTF0(1, "pc_dirfixdotdot: error in blkatoff\n"); return (error); } tep = ep; ep++; if (!PC_SHORTNAME_IS_DOT(tep->pcd_filename) && !PC_SHORTNAME_IS_DOTDOT(ep->pcd_filename)) { PC_DPRINTF0(1, "pc_dirfixdotdot: mangled directory entry\n"); error = ENOTDIR; return (error); } cn = pc_getstartcluster(fsp, &npdp->pc_entry); pc_setstartcluster(fsp, ep, cn); bwrite2(bp); error = geterror(bp); brelse(bp); if (error) { PC_DPRINTF0(1, "pc_dirfixdotdot: error in write\n"); pc_mark_irrecov(fsp); return (EIO); } return (0); } /* * Search a directory for an entry. * The directory should be locked as this routine * will sleep on I/O while searching. */ static int pc_findentry( struct pcnode *dp, /* parent directory */ char *namep, /* name to lookup */ struct pcslot *slotp, offset_t *lfn_offset) { offset_t offset; struct pcdir *ep = NULL; int boff; int error; struct vnode *vp; struct pcfs *fsp; vp = PCTOV(dp); PC_DPRINTF2(6, "pc_findentry: looking for %s in dir 0x%p\n", namep, (void *)dp); slotp->sl_status = SL_NONE; if (!(dp->pc_entry.pcd_attr & PCA_DIR)) { return (ENOTDIR); } /* * Verify that the dp is still valid on the disk */ fsp = VFSTOPCFS(vp->v_vfsp); error = pc_verify(fsp); if (error) return (error); slotp->sl_bp = NULL; offset = 0; for (;;) { /* * If offset is on a block boundary, * read in the next directory block. * Release previous if it exists. */ boff = pc_blkoff(fsp, offset); if (boff == 0 || slotp->sl_bp == NULL || boff >= slotp->sl_bp->b_bcount) { if (slotp->sl_bp != NULL) { brelse(slotp->sl_bp); slotp->sl_bp = NULL; } error = pc_blkatoff(dp, offset, &slotp->sl_bp, &ep); if (error == ENOENT && slotp->sl_status == SL_NONE) { slotp->sl_status = SL_EXTEND; slotp->sl_offset = (int)offset; } if (error) return (error); } if ((ep->pcd_filename[0] == PCD_UNUSED) || (ep->pcd_filename[0] == PCD_ERASED)) { /* * note empty slots, in case name is not found */ if (slotp->sl_status == SL_NONE) { slotp->sl_status = SL_FOUND; slotp->sl_blkno = pc_daddrdb(fsp, slotp->sl_bp->b_blkno); slotp->sl_offset = boff; } /* * If unused we've hit the end of the directory */ if (ep->pcd_filename[0] == PCD_UNUSED) break; offset += sizeof (struct pcdir); ep++; continue; } if (PCDL_IS_LFN(ep)) { offset_t t = offset; if (pc_match_long_fn(dp, namep, &ep, slotp, &offset) == 0) { if (lfn_offset != NULL) *lfn_offset = t; return (0); } continue; } if (pc_match_short_fn(dp, namep, &ep, slotp, &offset) == 0) return (0); } if (slotp->sl_bp != NULL) { brelse(slotp->sl_bp); slotp->sl_bp = NULL; } return (ENOENT); } /* * Obtain the block at offset "offset" in file pcp. */ int pc_blkatoff( struct pcnode *pcp, offset_t offset, struct buf **bpp, struct pcdir **epp) { struct pcfs *fsp; struct buf *bp; int size; int error; daddr_t bn; fsp = VFSTOPCFS(PCTOV(pcp)->v_vfsp); size = pc_blksize(fsp, pcp, offset); if (pc_blkoff(fsp, offset) >= size) { PC_DPRINTF0(5, "pc_blkatoff: ENOENT\n"); return (ENOENT); } error = pc_bmap(pcp, pc_lblkno(fsp, offset), &bn, NULL); if (error) return (error); bp = bread(fsp->pcfs_xdev, bn, size); if (bp->b_flags & B_ERROR) { PC_DPRINTF0(1, "pc_blkatoff: error\n"); brelse(bp); pc_mark_irrecov(fsp); return (EIO); } if (epp) { *epp = (struct pcdir *)(bp->b_un.b_addr + pc_blkoff(fsp, offset)); } *bpp = bp; return (0); } /* * Parse user filename into the pc form of "filename.extension". * If names are too long for the format (and enable_long_filenames is set) * it returns EINVAL (since either this name was read from the disk (so * it must fit), _or_ we're trying to match a long file name (so we * should fail). Tests for characters that are invalid in PCDOS and * converts to upper case (unless foldcase is 0). */ static int pc_parsename( char *namep, char *fnamep, char *fextp) { int n; char c; n = PCFNAMESIZE; c = *namep++; if (c == 0) return (EINVAL); if (c == '.') { /* * check for "." and "..". */ *fnamep++ = c; n--; if (c = *namep++) { if ((c != '.') || (c = *namep)) /* ".x" or "..x" */ return (EINVAL); *fnamep++ = '.'; n--; } } else { /* * filename up to '.' */ do { if (n-- > 0) { c = toupper(c); if (!pc_validchar(c)) return (EINVAL); *fnamep++ = c; } else { /* not short */ if (enable_long_filenames) return (EINVAL); } } while ((c = *namep++) != '\0' && c != '.'); } while (n-- > 0) { /* fill with blanks */ *fnamep++ = ' '; } /* * remainder is extension */ n = PCFEXTSIZE; if (c == '.') { while ((c = *namep++) != '\0' && n--) { c = toupper(c); if (!pc_validchar(c)) return (EINVAL); *fextp++ = c; } if (enable_long_filenames && (c != '\0')) { /* not short */ return (EINVAL); } } while (n-- > 0) { /* fill with blanks */ *fextp++ = ' '; } return (0); } /* * Match a long filename entry with 'namep'. Also return failure * if the long filename isn't valid. */ int pc_match_long_fn(struct pcnode *pcp, char *namep, struct pcdir **epp, struct pcslot *slotp, offset_t *offset) { struct pcdir *ep = (struct pcdir *)*epp; struct vnode *vp = PCTOV(pcp); struct pcfs *fsp = VFSTOPCFS(vp->v_vfsp); int error = 0; char lfn[PCMAXNAMLEN+1]; error = pc_extract_long_fn(pcp, lfn, epp, offset, &slotp->sl_bp); if (error) { if (error == EINVAL) { return (ENOENT); } else return (error); } ep = *epp; if ((u8_strcmp(lfn, namep, 0, U8_STRCMP_CI_UPPER, U8_UNICODE_LATEST, &error) == 0) && (error == 0)) { /* match */ slotp->sl_flags = 0; slotp->sl_blkno = pc_daddrdb(fsp, slotp->sl_bp->b_blkno); slotp->sl_offset = pc_blkoff(fsp, *offset); slotp->sl_ep = ep; return (0); } *offset += sizeof (struct pcdir); ep++; *epp = ep; /* If u8_strcmp detected an error it's sufficient to rtn ENOENT */ return (ENOENT); } /* * Match a short filename entry with namep. */ int pc_match_short_fn(struct pcnode *pcp, char *namep, struct pcdir **epp, struct pcslot *slotp, offset_t *offset) { char fname[PCFNAMESIZE]; char fext[PCFEXTSIZE]; struct pcdir *ep = *epp; int error; struct vnode *vp = PCTOV(pcp); struct pcfs *fsp = VFSTOPCFS(vp->v_vfsp); int boff = pc_blkoff(fsp, *offset); if (PCA_IS_HIDDEN(fsp, ep->pcd_attr)) { *offset += sizeof (struct pcdir); ep++; *epp = ep; return (ENOENT); } error = pc_parsename(namep, fname, fext); if (error) { *offset += sizeof (struct pcdir); ep++; *epp = ep; return (error); } if ((bcmp(fname, ep->pcd_filename, PCFNAMESIZE) == 0) && (bcmp(fext, ep->pcd_ext, PCFEXTSIZE) == 0)) { /* * found the file */ if (fname[0] == '.') { if (fname[1] == '.') slotp->sl_flags = SL_DOTDOT; else slotp->sl_flags = SL_DOT; } else { slotp->sl_flags = 0; } slotp->sl_blkno = pc_daddrdb(fsp, slotp->sl_bp->b_blkno); slotp->sl_offset = boff; slotp->sl_ep = ep; return (0); } *offset += sizeof (struct pcdir); ep++; *epp = ep; return (ENOENT); } /* * Remove a long filename entry starting at lfn_offset. It must be * a valid entry or we wouldn't have gotten here. Also remove the * short filename entry. */ static int pc_remove_long_fn(struct pcnode *pcp, offset_t lfn_offset) { struct vnode *vp = PCTOV(pcp); struct pcfs *fsp = VFSTOPCFS(vp->v_vfsp); int boff; struct buf *bp = NULL; struct pcdir *ep = NULL; int error = 0; /* * if we're in here, we know that the lfn is in the proper format * of followed by */ for (;;) { boff = pc_blkoff(fsp, lfn_offset); if (boff == 0 || bp == NULL || boff >= bp->b_bcount) { if (bp != NULL) { bwrite2(bp); error = geterror(bp); brelse(bp); if (error) return (error); bp = NULL; } error = pc_blkatoff(pcp, lfn_offset, &bp, &ep); if (error) return (error); } if (!PCDL_IS_LFN(ep)) { /* done */ break; } /* zap it */ ep->pcd_filename[0] = PCD_ERASED; ep->pcd_attr = 0; lfn_offset += sizeof (struct pcdir); ep++; } /* now we're on the short entry */ ep->pcd_filename[0] = PCD_ERASED; ep->pcd_attr = 0; if (bp != NULL) { bwrite2(bp); error = geterror(bp); brelse(bp); if (error) return (error); } return (0); } /* * Find (and allocate) space in the directory denoted by * 'pcp'. for 'ndirentries' pcdir structures. * Return the offset at which to start, or -1 for failure. */ static offset_t pc_find_free_space(struct pcnode *pcp, int ndirentries) { offset_t offset = 0; offset_t spaceneeded = ndirentries * sizeof (struct pcdir); offset_t spaceoffset; offset_t spaceavail = 0; int boff; struct buf *bp = NULL; struct vnode *vp = PCTOV(pcp); struct pcfs *fsp = VFSTOPCFS(vp->v_vfsp); struct pcdir *ep; int error; spaceoffset = offset; while (spaceneeded > spaceavail) { /* * If offset is on a block boundary, * read in the next directory block. * Release previous if it exists. */ boff = pc_blkoff(fsp, offset); if (boff == 0 || bp == NULL || boff >= bp->b_bcount) { if (bp != NULL) { brelse(bp); bp = NULL; } error = pc_blkatoff(pcp, offset, &bp, &ep); if (error == ENOENT) { daddr_t bn; /* extend directory */ if (!IS_FAT32(fsp) && (vp->v_flag & VROOT)) return (-1); while (spaceneeded > spaceavail) { error = pc_balloc(pcp, pc_lblkno(fsp, offset), 1, &bn); if (error) return (-1); pcp->pc_size += fsp->pcfs_clsize; spaceavail += fsp->pcfs_clsize; offset += fsp->pcfs_clsize; } return (spaceoffset); } if (error) return (-1); } if ((ep->pcd_filename[0] == PCD_UNUSED) || (ep->pcd_filename[0] == PCD_ERASED)) { offset += sizeof (struct pcdir); spaceavail += sizeof (struct pcdir); ep++; continue; } offset += sizeof (struct pcdir); spaceavail = 0; spaceoffset = offset; ep++; } if (bp != NULL) { brelse(bp); } return (spaceoffset); } /* * Return how many long filename entries are needed. * A maximum of PCLFNCHUNKSIZE characters per entry, plus one for a * short filename. */ static int direntries_needed(struct pcnode *dp, char *namep) { struct pcdir ep; uint16_t *w2_str; size_t u8l, u16l; int ret; if (enable_long_filenames == 0) { return (1); } if (pc_is_short_file_name(namep, 0)) { (void) pc_parsename(namep, ep.pcd_filename, ep.pcd_ext); if (!shortname_exists(dp, ep.pcd_filename, ep.pcd_ext)) { return (1); } } if (pc_valid_long_fn(namep, 1)) { /* * convert to UTF-16 or UNICODE for calculating the entries * needed. Conversion will consume at the most 512 bytes */ u16l = PCMAXNAMLEN + 1; w2_str = (uint16_t *)kmem_zalloc(PCMAXNAM_UTF16, KM_SLEEP); u8l = strlen(namep); ret = uconv_u8tou16((const uchar_t *)namep, &u8l, w2_str, &u16l, UCONV_OUT_LITTLE_ENDIAN); kmem_free((caddr_t)w2_str, PCMAXNAM_UTF16); if (ret == 0) { ret = 1 + u16l / PCLFNCHUNKSIZE; if (u16l % PCLFNCHUNKSIZE != 0) ret++; return (ret); } } return (-1); } /* * Allocate and return an array of pcdir structures for the passed-in * name. ndirentries tells how many are required (including the short * filename entry). Just allocate and fill them in properly here so they * can be written out. */ static struct pcdir * pc_name_to_pcdir(struct pcnode *dp, char *namep, int ndirentries, int *errret) { struct pcdir *bpcdir; struct pcdir *ep; struct pcdir_lfn *lep; int i; uchar_t cksum; int nchars; int error = 0; char *nameend; uint16_t *w2_str; size_t u8l, u16l; int ret; bpcdir = kmem_zalloc(ndirentries * sizeof (struct pcdir), KM_SLEEP); ep = &bpcdir[ndirentries - 1]; if (ndirentries == 1) { (void) pc_parsename(namep, ep->pcd_filename, ep->pcd_ext); return (bpcdir); } /* Here we need to convert to UTF-16 or UNICODE for writing */ u16l = PCMAXNAMLEN + 1; w2_str = (uint16_t *)kmem_zalloc(PCMAXNAM_UTF16, KM_SLEEP); u8l = strlen(namep); ret = uconv_u8tou16((const uchar_t *)namep, &u8l, w2_str, &u16l, UCONV_OUT_LITTLE_ENDIAN); if (ret != 0) { kmem_free((caddr_t)w2_str, PCMAXNAM_UTF16); *errret = ret; return (NULL); } nameend = (char *)(w2_str + u16l); u16l %= PCLFNCHUNKSIZE; if (u16l != 0) { nchars = u16l + 1; nameend += 2; } else { nchars = PCLFNCHUNKSIZE; } nchars *= sizeof (uint16_t); /* short file name */ error = generate_short_name(dp, namep, ep); if (error) { kmem_free(bpcdir, ndirentries * sizeof (struct pcdir)); *errret = error; return (NULL); } cksum = pc_checksum_long_fn(ep->pcd_filename, ep->pcd_ext); for (i = 0; i < (ndirentries - 1); i++) { /* long file name */ nameend -= nchars; lep = (struct pcdir_lfn *)&bpcdir[i]; set_long_fn_chunk(lep, nameend, nchars); lep->pcdl_attr = PCDL_LFN_BITS; lep->pcdl_checksum = cksum; lep->pcdl_ordinal = (uchar_t)(ndirentries - i - 1); nchars = PCLFNCHUNKSIZE * sizeof (uint16_t); } kmem_free((caddr_t)w2_str, PCMAXNAM_UTF16); lep = (struct pcdir_lfn *)&bpcdir[0]; lep->pcdl_ordinal |= 0x40; return (bpcdir); } static int generate_short_name(struct pcnode *dp, char *namep, struct pcdir *inep) { int rev; int nchars; int i, j; char *dot = NULL; char fname[PCFNAMESIZE+1]; char fext[PCFEXTSIZE+1]; char scratch[8]; int error = 0; struct pcslot slot; char shortname[20]; int force_tilde = 0; /* * generate a unique short file name based on the long input name. * * Say, for "This is a very long filename.txt" generate * "THISIS~1.TXT", or "THISIS~2.TXT" if that's already there. * Skip invalid short name characters in the long name, plus * a couple NT skips (space and reverse backslash). * * Unfortunately, since this name would be hidden by the normal * lookup routine, we need to look for it ourselves. But luckily * we don't need to look at the lfn entries themselves. */ force_tilde = !pc_is_short_file_name(namep, 1); /* * Strip off leading invalid characters. * We need this because names like '.login' are now ok, but the * short name needs to be something like LOGIN~1. */ for (; *namep != '\0'; namep++) { if (*namep == ' ') continue; if (!pc_validchar(*namep) && !pc_validchar(toupper(*namep))) continue; break; } dot = strrchr(namep, '.'); if (dot != NULL) { dot++; for (j = 0, i = 0; j < PCFEXTSIZE; i++) { if (dot[i] == '\0') break; /* skip valid, but not generally good characters */ if (dot[i] == ' ' || dot[i] == '\\') continue; if (pc_validchar(dot[i])) fext[j++] = dot[i]; else if (pc_validchar(toupper(dot[i]))) fext[j++] = toupper(dot[i]); } for (i = j; i < PCFEXTSIZE; i++) fext[i] = ' '; dot--; } else { for (i = 0; i < PCFEXTSIZE; i++) { fext[i] = ' '; } } /* * We know we're a long name, not a short name (or we wouldn't * be here at all. But if uppercasing ourselves would be a short * name, then we can possibly avoid the ~N format. */ if (!force_tilde) rev = 0; else rev = 1; for (;;) { bzero(fname, sizeof (fname)); nchars = PCFNAMESIZE; if (rev) { nchars--; /* ~ */ i = rev; do { nchars--; i /= 10; } while (i); if (nchars <= 0) { return (ENOSPC); } } for (j = 0, i = 0; j < nchars; i++) { if ((&namep[i] == dot) || (namep[i] == '\0')) break; /* skip valid, but not generally good characters */ if (namep[i] == ' ' || namep[i] == '\\') continue; if (pc_validchar(namep[i])) fname[j++] = namep[i]; else if (pc_validchar(toupper(namep[i]))) fname[j++] = toupper(namep[i]); } if (rev) { (void) sprintf(scratch, "~%d", rev); (void) strcat(fname, scratch); } for (i = strlen(fname); i < PCFNAMESIZE; i++) fname[i] = ' '; /* now see if it exists */ (void) pc_fname_ext_to_name(shortname, fname, fext, 0); error = pc_findentry(dp, shortname, &slot, NULL); if (error == 0) { /* found it */ brelse(slot.sl_bp); rev++; continue; } if (!shortname_exists(dp, fname, fext)) break; rev++; } (void) strncpy(inep->pcd_filename, fname, PCFNAMESIZE); (void) strncpy(inep->pcd_ext, fext, PCFEXTSIZE); return (0); } /* * Returns 1 if the passed-in filename is a short name, 0 if not. */ static int pc_is_short_file_name(char *namep, int foldcase) { int i; char c; for (i = 0; i < PCFNAMESIZE; i++, namep++) { if (*namep == '\0') return (1); if (*namep == '.') break; if (foldcase) c = toupper(*namep); else c = *namep; if (!pc_validchar(c)) return (0); } if (*namep == '\0') return (1); if (*namep != '.') return (0); namep++; for (i = 0; i < PCFEXTSIZE; i++, namep++) { if (*namep == '\0') return (1); if (foldcase) c = toupper(*namep); else c = *namep; if (!pc_validchar(c)) return (0); } /* we should be done. If not... */ if (*namep == '\0') return (1); return (0); } /* * We call this when we want to see if a short filename already exists * in the filesystem as part of a long filename. When creating a short * name (FILENAME.TXT from the user, or when generating one for a long * filename), we cannot allow one that is part of a long filename. * pc_findentry will find all the names that are visible (long or short), * but will not crack any long filename entries. */ static int shortname_exists(struct pcnode *dp, char *fname, char *fext) { struct buf *bp = NULL; int offset = 0; int match = 0; struct pcdir *ep; struct vnode *vp = PCTOV(dp); struct pcfs *fsp = VFSTOPCFS(vp->v_vfsp); int boff; int error = 0; for (;;) { boff = pc_blkoff(fsp, offset); if (boff == 0 || bp == NULL || boff >= bp->b_bcount) { if (bp != NULL) { brelse(bp); bp = NULL; } error = pc_blkatoff(dp, offset, &bp, &ep); if (error == ENOENT) break; if (error) { return (1); } } if (PCDL_IS_LFN(ep) || (ep->pcd_filename[0] == PCD_ERASED)) { offset += sizeof (struct pcdir); ep++; continue; } if (ep->pcd_filename[0] == PCD_UNUSED) break; /* * in use, and a short file name (either standalone * or associated with a long name */ if ((bcmp(fname, ep->pcd_filename, PCFNAMESIZE) == 0) && (bcmp(fext, ep->pcd_ext, PCFEXTSIZE) == 0)) { match = 1; break; } offset += sizeof (struct pcdir); ep++; } if (bp) { brelse(bp); bp = NULL; } return (match); } pc_cluster32_t pc_getstartcluster(struct pcfs *fsp, struct pcdir *ep) { if (IS_FAT32(fsp)) { pc_cluster32_t cn; pc_cluster16_t hi16; pc_cluster16_t lo16; hi16 = ltohs(ep->un.pcd_scluster_hi); lo16 = ltohs(ep->pcd_scluster_lo); cn = (hi16 << 16) | lo16; return (cn); } else { return (ltohs(ep->pcd_scluster_lo)); } } void pc_setstartcluster(struct pcfs *fsp, struct pcdir *ep, pc_cluster32_t cln) { if (IS_FAT32(fsp)) { pc_cluster16_t hi16; pc_cluster16_t lo16; hi16 = (cln >> 16) & 0xFFFF; lo16 = cln & 0xFFFF; ep->un.pcd_scluster_hi = htols(hi16); ep->pcd_scluster_lo = htols(lo16); } else { pc_cluster16_t cln16; cln16 = (pc_cluster16_t)cln; ep->pcd_scluster_lo = htols(cln16); } }