/* * Copyright (c) 2000-2001 Boris Popov * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Boris Popov. * 4. Neither the name of the author nor the names of any co-contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD: src/sys/fs/smbfs/smbfs_node.c,v 1.2.2.3 2003/01/17 08:20:26 tjr Exp $ */ #include #include #include #include #include #include #include #include #include #include #include /*#include #include */ #include #include #include #include #include "smbfs.h" #include "smbfs_node.h" #include "smbfs_subr.h" #define SMBFS_NOHASH(smp, hval) (&(smp)->sm_hash[(hval) & (smp)->sm_hashlen]) #define smbfs_hash_lock(smp, td) lockmgr(&smp->sm_hashlock, LK_EXCLUSIVE) #define smbfs_hash_unlock(smp, td) lockmgr(&smp->sm_hashlock, LK_RELEASE) MALLOC_DEFINE(M_SMBNODE, "SMBFS node", "SMBFS vnode private part"); static MALLOC_DEFINE(M_SMBNODENAME, "SMBFS nname", "SMBFS node name"); int smbfs_hashprint(struct mount *mp); #if 0 #ifdef SYSCTL_DECL SYSCTL_DECL(_vfs_smbfs); #endif SYSCTL_PROC(_vfs_smbfs, OID_AUTO, vnprint, CTLFLAG_WR|CTLTYPE_OPAQUE, NULL, 0, smbfs_hashprint, "S,vnlist", "vnode hash"); #endif #define FNV_32_PRIME ((u_int32_t) 0x01000193UL) #define FNV1_32_INIT ((u_int32_t) 33554467UL) u_int32_t smbfs_hash(const u_char *name, int nmlen) { u_int32_t v; for (v = FNV1_32_INIT; nmlen; name++, nmlen--) { v *= FNV_32_PRIME; v ^= (u_int32_t)*name; } return v; } int smbfs_hashprint(struct mount *mp) { struct smbmount *smp = VFSTOSMBFS(mp); struct smbnode_hashhead *nhpp; struct smbnode *np; int i; for(i = 0; i <= smp->sm_hashlen; i++) { nhpp = &smp->sm_hash[i]; LIST_FOREACH(np, nhpp, n_hash) vprint(NULL, SMBTOV(np)); } return 0; } static char * smbfs_name_alloc(const u_char *name, int nmlen) { u_char *cp; nmlen++; #ifdef SMBFS_NAME_DEBUG cp = kmalloc(nmlen + 2 + sizeof(int), M_SMBNODENAME, M_WAITOK); *(int*)cp = nmlen; cp += sizeof(int); cp[0] = 0xfc; cp++; bcopy(name, cp, nmlen - 1); cp[nmlen] = 0xfe; #else cp = kmalloc(nmlen, M_SMBNODENAME, M_WAITOK); bcopy(name, cp, nmlen - 1); #endif cp[nmlen - 1] = 0; return cp; } static void smbfs_name_free(u_char *name) { #ifdef SMBFS_NAME_DEBUG int nmlen, slen; u_char *cp; cp = name; cp--; if (*cp != 0xfc) { kprintf("First byte of name entry '%s' corrupted\n", name); Debugger("ditto"); } cp -= sizeof(int); nmlen = *(int*)cp; slen = strlen(name) + 1; if (nmlen != slen) { kprintf("Name length mismatch: was %d, now %d name '%s'\n", nmlen, slen, name); Debugger("ditto"); } if (name[nmlen] != 0xfe) { kprintf("Last byte of name entry '%s' corrupted\n", name); Debugger("ditto"); } kfree(cp, M_SMBNODENAME); #else kfree(name, M_SMBNODENAME); #endif } static int smbfs_node_alloc(struct mount *mp, struct vnode *dvp, const char *name, int nmlen, struct smbfattr *fap, struct vnode **vpp) { struct smbmount *smp = VFSTOSMBFS(mp); struct smbnode_hashhead *nhpp; struct smbnode *np, *np2, *dnp; struct vnode *vp; u_long hashval; int error; *vpp = NULL; if (smp->sm_root != NULL && dvp == NULL) { SMBERROR("do not allocate root vnode twice!\n"); return EINVAL; } if (nmlen == 2 && bcmp(name, "..", 2) == 0) { if (dvp == NULL) return EINVAL; vp = VTOSMB(VTOSMB(dvp)->n_parent)->n_vnode; error = vget(vp, LK_EXCLUSIVE); if (error == 0) *vpp = vp; return error; } else if (nmlen == 1 && name[0] == '.') { SMBERROR("do not call me with dot!\n"); return EINVAL; } dnp = dvp ? VTOSMB(dvp) : NULL; if (dnp == NULL && dvp != NULL) { vprint("smbfs_node_alloc: dead parent vnode", dvp); return EINVAL; } hashval = smbfs_hash(name, nmlen); retry: smbfs_hash_lock(smp, td); loop: nhpp = SMBFS_NOHASH(smp, hashval); LIST_FOREACH(np, nhpp, n_hash) { if (np->n_parent != dvp || np->n_nmlen != nmlen || bcmp(name, np->n_name, nmlen) != 0) continue; vp = SMBTOV(np); smbfs_hash_unlock(smp, td); if (vget(vp, LK_EXCLUSIVE) != 0) goto retry; /* * relookup after we blocked. */ LIST_FOREACH(np2, nhpp, n_hash) { if (np2->n_parent == dvp && np2->n_nmlen == nmlen && bcmp(name, np2->n_name, nmlen) == 0) break; } if (np2 != np || SMBTOV(np2) != vp) { vput(vp); goto retry; } *vpp = vp; return 0; } smbfs_hash_unlock(smp, td); /* * If we don't have node attributes, then it is an explicit lookup * for an existing vnode. */ if (fap == NULL) return ENOENT; np = kmalloc(sizeof *np, M_SMBNODE, M_WAITOK | M_ZERO); error = getnewvnode(VT_SMBFS, mp, &vp, VLKTIMEOUT, LK_CANRECURSE); if (error) { kfree(np, M_SMBNODE); return error; } vp->v_type = fap->fa_attr & SMB_FA_DIR ? VDIR : VREG; vp->v_data = np; np->n_vnode = vp; np->n_mount = VFSTOSMBFS(mp); np->n_nmlen = nmlen; np->n_name = smbfs_name_alloc(name, nmlen); np->n_ino = fap->fa_ino; if (dvp) { np->n_parent = dvp; if (/*vp->v_type == VDIR &&*/ (dvp->v_flag & VROOT) == 0) { vref(dvp); np->n_flag |= NREFPARENT; } } else if (vp->v_type == VREG) SMBERROR("new vnode '%s' born without parent ?\n", np->n_name); smbfs_hash_lock(smp, td); LIST_FOREACH(np2, nhpp, n_hash) { if (np2->n_parent != dvp || np2->n_nmlen != nmlen || bcmp(name, np2->n_name, nmlen) != 0) continue; vx_put(vp); /* smb_name_free(np->n_name); FREE(np, M_SMBNODE);*/ goto loop; } LIST_INSERT_HEAD(nhpp, np, n_hash); smbfs_hash_unlock(smp, td); /* * Return a locked and refd vnode */ vx_downgrade(vp); *vpp = vp; return 0; } int smbfs_nget(struct mount *mp, struct vnode *dvp, const char *name, int nmlen, struct smbfattr *fap, struct vnode **vpp) { struct vnode *vp; int error; *vpp = NULL; error = smbfs_node_alloc(mp, dvp, name, nmlen, fap, &vp); if (error) return error; if (fap) smbfs_attr_cacheenter(vp, fap); *vpp = vp; return 0; } /* * Free smbnode, and give vnode back to system * * smbfs_reclaim(struct vnode *a_vp) */ int smbfs_reclaim(struct vop_reclaim_args *ap) { struct vnode *vp = ap->a_vp; struct vnode *dvp; struct smbnode *np = VTOSMB(vp); struct smbmount *smp = VTOSMBFS(vp); SMBVDEBUG("%s,%08x\n", np->n_name, vp->v_refcnt); smbfs_hash_lock(smp, td); dvp = (np->n_parent && (np->n_flag & NREFPARENT)) ? np->n_parent : NULL; if (np->n_hash.le_prev) LIST_REMOVE(np, n_hash); if (smp->sm_root == np) { SMBVDEBUG("root vnode\n"); smp->sm_root = NULL; } vp->v_data = NULL; smbfs_hash_unlock(smp, td); if (np->n_name) smbfs_name_free(np->n_name); kfree(np, M_SMBNODE); if (dvp) { /* * Indicate that we released something; see comment * in smbfs_unmount(). */ smp->sm_didrele = 1; vrele(dvp); } return 0; } /* * smbfs_inactive(struct vnode *a_vp) */ int smbfs_inactive(struct vop_inactive_args *ap) { struct ucred *cred; struct vnode *vp = ap->a_vp; struct smbnode *np = VTOSMB(vp); struct smb_cred scred; int error; SMBVDEBUG("%s: %08x\n", VTOSMB(vp)->n_name, vp->v_refcnt); if (np->n_opencount) { error = smbfs_vinvalbuf(vp, V_SAVE, 1); cred = np->n_cached_cred; np->n_cached_cred = NULL; smb_makescred(&scred, curthread, cred); error = smbfs_smb_close(np->n_mount->sm_share, np->n_fid, &np->n_mtime, &scred); np->n_opencount = 0; crfree(cred); } return (0); } /* * routines to maintain vnode attributes cache * smbfs_attr_cacheenter: unpack np.i to vattr structure */ void smbfs_attr_cacheenter(struct vnode *vp, struct smbfattr *fap) { struct smbnode *np = VTOSMB(vp); if (vp->v_type == VREG) { if (np->n_size != fap->fa_size) { np->n_size = fap->fa_size; vnode_pager_setsize(vp, np->n_size); } } else if (vp->v_type == VDIR) { np->n_size = 16384; /* should be a better way ... */ } else return; np->n_mtime = fap->fa_mtime; np->n_dosattr = fap->fa_attr; np->n_attrage = time_uptime; return; } int smbfs_attr_cachelookup(struct vnode *vp, struct vattr *va) { struct smbnode *np = VTOSMB(vp); struct smbmount *smp = VTOSMBFS(vp); int diff; diff = (int)(time_uptime - np->n_attrage); if (diff > 2) /* XXX should be configurable */ return ENOENT; va->va_type = vp->v_type; /* vnode type (for create) */ if (vp->v_type == VREG) { va->va_mode = smp->sm_args.file_mode; /* files access mode and type */ } else if (vp->v_type == VDIR) { va->va_mode = smp->sm_args.dir_mode; /* files access mode and type */ } else return EINVAL; va->va_size = np->n_size; va->va_nlink = 1; /* number of references to file */ va->va_uid = smp->sm_args.uid; /* owner user id */ va->va_gid = smp->sm_args.gid; /* owner group id */ va->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; va->va_fileid = np->n_ino; /* file id */ if (va->va_fileid == 0) va->va_fileid = 2; va->va_blocksize = SSTOVC(smp->sm_share)->vc_txmax; va->va_mtime = np->n_mtime; va->va_atime = va->va_ctime = va->va_mtime; /* time file changed */ va->va_gen = VNOVAL; /* generation number of file */ va->va_flags = 0; /* flags defined for file */ va->va_rmajor = VNOVAL; /* device the special file represents */ va->va_rminor = VNOVAL; va->va_bytes = va->va_size; /* bytes of disk space held by file */ va->va_filerev = 0; /* file modification number */ va->va_vaflags = 0; /* operations flags */ return 0; } void smbfs_attr_cacherename(struct vnode *vp, const char *name, int nmlen) { struct smbnode_hashhead *nhpp; struct smbmount *smp = VTOSMBFS(vp); struct smbnode *np; u_long hashval; hashval = smbfs_hash(name, nmlen); smbfs_hash_lock(smp, td); np = VTOSMB(vp); if (np->n_hash.le_prev) LIST_REMOVE(np, n_hash); smbfs_name_free(np->n_name); np->n_nmlen = nmlen; np->n_name = smbfs_name_alloc(name, nmlen); nhpp = SMBFS_NOHASH(smp, hashval); LIST_INSERT_HEAD(nhpp, np, n_hash); smbfs_hash_unlock(smp, td); }