/* * Copyright 2000, International Business Machines Corporation and others. * All Rights Reserved. * * This software has been released under the terms of the IBM Public * License. For details, see the LICENSE file in the top-level source * directory or online at http://www.openafs.org/dl/license10.html */ #include #include "afs/param.h" #include "afs/sysincludes.h" /* Standard vendor system headers */ #include "afsincludes.h" /* Afs-based standard headers */ #include "afs/afs_stats.h" /* afs statistics */ int afs_osicred_initialized = 0; afs_ucred_t afs_osi_cred; afs_lock_t afs_xosi; /* lock is for tvattr */ extern struct osi_dev cacheDev; extern struct mount *afs_cacheVfsp; void * osi_UFSOpen(afs_dcache_id_t *ainode) { struct osi_file *afile; struct vnode *vp; extern int cacheDiskType; afs_int32 code; AFS_STATCNT(osi_UFSOpen); if (cacheDiskType != AFS_FCACHE_TYPE_UFS) osi_Panic("UFSOpen called for non-UFS cache\n"); afile = (struct osi_file *)osi_AllocSmallSpace(sizeof(struct osi_file)); AFS_GUNLOCK(); #if defined(AFS_FBSD50_ENV) code = VFS_VGET(afs_cacheVfsp, (ino_t) ainode->ufs, LK_EXCLUSIVE, &vp); #else code = VFS_VGET(afs_cacheVfsp, (ino_t) ainode->ufs, &vp); #endif AFS_GLOCK(); if (code == 0 && vp->v_type == VNON) code = ENOENT; if (code) { osi_FreeSmallSpace(afile); osi_Panic("UFSOpen: igetinode failed"); } #if defined(AFS_FBSD80_ENV) VOP_UNLOCK(vp, 0); #elif defined(AFS_FBSD50_ENV) VOP_UNLOCK(vp, 0, curthread); #else VOP_UNLOCK(vp, 0, curproc); #endif afile->vnode = vp; afile->size = VTOI(vp)->i_size; afile->offset = 0; afile->proc = NULL; return (void *)afile; } int afs_osi_Stat(register struct osi_file *afile, register struct osi_stat *astat) { register afs_int32 code; struct vattr tvattr; AFS_STATCNT(osi_Stat); ObtainWriteLock(&afs_xosi, 320); AFS_GUNLOCK(); #if defined(AFS_FBSD80_ENV) vn_lock(afile->vnode, LK_EXCLUSIVE | LK_RETRY); code = VOP_GETATTR(afile->vnode, &tvattr, afs_osi_credp, curthread); VOP_UNLOCK(afile->vnode, 0); #elif defined(AFS_FBSD50_ENV) vn_lock(afile->vnode, LK_EXCLUSIVE | LK_RETRY, curthread); code = VOP_GETATTR(afile->vnode, &tvattr, afs_osi_credp, curthread); VOP_UNLOCK(afile->vnode, LK_EXCLUSIVE, curthread); #else code = VOP_GETATTR(afile->vnode, &tvattr, afs_osi_credp, curproc); #endif AFS_GLOCK(); if (code == 0) { astat->size = tvattr.va_size; astat->mtime = tvattr.va_mtime.tv_sec; astat->atime = tvattr.va_atime.tv_sec; } ReleaseWriteLock(&afs_xosi); return code; } int osi_UFSClose(register struct osi_file *afile) { AFS_STATCNT(osi_Close); if (afile->vnode) { AFS_RELE(afile->vnode); } osi_FreeSmallSpace(afile); return 0; } int osi_UFSTruncate(register struct osi_file *afile, afs_int32 asize) { struct vattr tvattr; struct vnode *vp; register afs_int32 code, glocked; AFS_STATCNT(osi_Truncate); ObtainWriteLock(&afs_xosi, 321); vp = afile->vnode; /* * This routine only shrinks files, and most systems * have very slow truncates, even when the file is already * small enough. Check now and save some time. */ glocked = ISAFS_GLOCK(); if (glocked) AFS_GUNLOCK(); #if defined(AFS_FBSD80_ENV) vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); code = VOP_GETATTR(afile->vnode, &tvattr, afs_osi_credp, curthread); #elif defined(AFS_FBSD50_ENV) vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, curthread); code = VOP_GETATTR(afile->vnode, &tvattr, afs_osi_credp, curthread); #else vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, curproc); code = VOP_GETATTR(afile->vnode, &tvattr, afs_osi_credp, curproc); #endif if (code != 0 || tvattr.va_size <= asize) goto out; VATTR_NULL(&tvattr); tvattr.va_size = asize; #if defined(AFS_FBSD50_ENV) code = VOP_SETATTR(vp, &tvattr, afs_osi_credp, curthread); #else code = VOP_SETATTR(vp, &tvattr, afs_osi_credp, curproc); #endif out: #if defined(AFS_FBSD80_ENV) VOP_UNLOCK(vp, 0); #elif defined(AFS_FBSD50_ENV) VOP_UNLOCK(vp, LK_EXCLUSIVE, curthread); #else VOP_UNLOCK(vp, LK_EXCLUSIVE, curproc); #endif if (glocked) AFS_GLOCK(); ReleaseWriteLock(&afs_xosi); return code; } void osi_DisableAtimes(struct vnode *avp) { struct inode *ip = VTOI(avp); ip->i_flag &= ~IN_ACCESS; } /* Generic read interface */ int afs_osi_Read(register struct osi_file *afile, int offset, void *aptr, afs_int32 asize) { unsigned int resid; register afs_int32 code; AFS_STATCNT(osi_Read); /** * If the osi_file passed in is NULL, panic only if AFS is not shutting * down. No point in crashing when we are already shutting down */ if (!afile) { if (!afs_shuttingdown) osi_Panic("osi_Read called with null param"); else return EIO; } if (offset != -1) afile->offset = offset; AFS_GUNLOCK(); code = gop_rdwr(UIO_READ, afile->vnode, (caddr_t) aptr, asize, afile->offset, AFS_UIOSYS, IO_UNIT, afs_osi_credp, &resid); AFS_GLOCK(); if (code == 0) { code = asize - resid; afile->offset += code; osi_DisableAtimes(afile->vnode); } else { afs_Trace2(afs_iclSetp, CM_TRACE_READFAILED, ICL_TYPE_INT32, resid, ICL_TYPE_INT32, code); code = -1; } return code; } /* Generic write interface */ int afs_osi_Write(register struct osi_file *afile, afs_int32 offset, void *aptr, afs_int32 asize) { unsigned int resid; register afs_int32 code; AFS_STATCNT(osi_Write); if (!afile) osi_Panic("afs_osi_Write called with null param"); if (offset != -1) afile->offset = offset; { AFS_GUNLOCK(); code = gop_rdwr(UIO_WRITE, afile->vnode, (caddr_t) aptr, asize, afile->offset, AFS_UIOSYS, IO_UNIT, afs_osi_credp, &resid); AFS_GLOCK(); } if (code == 0) { code = asize - resid; afile->offset += code; } else { code = -1; } if (afile->proc) { (*afile->proc) (afile, code); } return code; } /* This work should be handled by physstrat in ca/machdep.c. This routine written from the RT NFS port strategy routine. It has been generalized a bit, but should still be pretty clear. */ int afs_osi_MapStrategy(int (*aproc) (), register struct buf *bp) { afs_int32 returnCode; AFS_STATCNT(osi_MapStrategy); returnCode = (*aproc) (bp); return returnCode; } void shutdown_osifile(void) { AFS_STATCNT(shutdown_osifile); if (afs_cold_shutdown) { afs_osicred_initialized = 0; } }