/* * 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" RCSID ("$Header$"); #include "afs/sysincludes.h" /* Standard vendor system headers */ #include "afsincludes.h" /* Afs-based standard headers */ #include "afs/afs_stats.h" /* afs statistics */ struct AFS_UCRED afs_osi_cred; int afs_osicred_initialized = 0; afs_lock_t afs_xosi; /* lock is for tvattr */ extern struct osi_dev cacheDev; extern struct vfs *afs_cacheVfsp; /* As of 6.2, we support either XFS or EFS clients. osi_UFSOpen * now vectors to the correct EFS or XFS function. If new functionality is * added which accesses the inode, that will also need EFS/XFS variants. */ #ifdef AFS_SGI_EFS_IOPS_ENV vnode_t * afs_EFSIGetVnode(ino_t ainode) { struct inode *ip; int error; if ((error = igetinode(afs_cacheVfsp, (dev_t) cacheDev.dev, ainode, &ip))) { osi_Panic("afs_EFSIGetVnode: igetinode failed, error=%d", error); } /* We don't care about atimes on the cache files, so disable them. I'm not * sure that this is the right place to do this: it should be *after* readi * and getattr and stuff. */ ip->i_flags &= ~(ISYN | IACC); iunlock(ip); return (EFS_ITOV(ip)); } #endif /* AFS_SGI_EFS_IOPS_ENV */ vnode_t * afs_XFSIGetVnode(ino_t ainode) { struct xfs_inode *ip; int error; vnode_t *vp; if ((error = xfs_igetinode(afs_cacheVfsp, (dev_t) cacheDev.dev, ainode, &ip))) { osi_Panic("afs_XFSIGetVnode: xfs_igetinode failed, error=%d", error); } vp = XFS_ITOV(ip); return vp; } /* Force to 64 bits, even for EFS filesystems. */ void * osi_UFSOpen(ino_t ainode) { struct inode *ip; register struct osi_file *afile = NULL; extern int cacheDiskType; afs_int32 code = 0; int dummy; AFS_STATCNT(osi_UFSOpen); if (cacheDiskType != AFS_FCACHE_TYPE_UFS) { osi_Panic("UFSOpen called for non-UFS cache\n"); } if (!afs_osicred_initialized) { /* valid for alpha_osf, SunOS, Ultrix */ memset((char *)&afs_osi_cred, 0, sizeof(struct AFS_UCRED)); crhold(&afs_osi_cred); /* don't let it evaporate, since it is static */ afs_osicred_initialized = 1; } afile = (struct osi_file *)osi_AllocSmallSpace(sizeof(struct osi_file)); AFS_GUNLOCK(); afile->vnode = AFS_SGI_IGETVNODE(ainode); AFS_GLOCK(); afile->size = VnodeToSize(afile->vnode); afile->offset = 0; afile->proc = (int (*)())0; afile->inum = ainode; /* for hint validity checking */ 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); MObtainWriteLock(&afs_xosi, 320); AFS_GUNLOCK(); tvattr.va_mask = AT_SIZE | AT_BLKSIZE | AT_MTIME | AT_ATIME; AFS_VOP_GETATTR(afile->vnode, &tvattr, 0, &afs_osi_cred, code); AFS_GLOCK(); if (code == 0) { astat->size = tvattr.va_size; astat->blksize = tvattr.va_blocksize; astat->mtime = tvattr.va_mtime.tv_sec; astat->atime = tvattr.va_atime.tv_sec; } MReleaseWriteLock(&afs_xosi); return code; } int osi_UFSClose(register struct osi_file *afile) { AFS_STATCNT(osi_Close); if (afile->vnode) { VN_RELE(afile->vnode); } osi_FreeSmallSpace(afile); return 0; } int osi_UFSTruncate(register struct osi_file *afile, afs_int32 asize) { struct AFS_UCRED *oldCred; struct vattr tvattr; register afs_int32 code; struct osi_stat tstat; mon_state_t ms; AFS_STATCNT(osi_Truncate); /* 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. */ code = afs_osi_Stat(afile, &tstat); if (code || tstat.size <= asize) return code; MObtainWriteLock(&afs_xosi, 321); AFS_GUNLOCK(); tvattr.va_mask = AT_SIZE; tvattr.va_size = asize; AFS_VOP_SETATTR(afile->vnode, &tvattr, 0, &afs_osi_cred, code); AFS_GLOCK(); MReleaseWriteLock(&afs_xosi); return code; } #ifdef AFS_SGI_EFS_IOPS_ENV void osi_DisableAtimes(struct vnode *avp) { if (afs_CacheFSType == AFS_SGI_EFS_CACHE) { struct inode *ip = EFS_VTOI(avp); ip->i_flags &= ~IACC; } } #endif /* AFS_SGI_EFS_IOPS_ENV */ /* Generic read interface */ int afs_osi_Read(register struct osi_file *afile, int offset, void *aptr, afs_int32 asize) { struct AFS_UCRED *oldCred; ssize_t resid; register afs_int32 code; register afs_int32 cnt1 = 0; 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, 0, 0x7fffffff, &afs_osi_cred, &resid); AFS_GLOCK(); if (code == 0) { code = asize - resid; afile->offset += code; #ifdef AFS_SGI_EFS_IOPS_ENV osi_DisableAtimes(afile->vnode); #endif /* AFS_SGI_EFS_IOPS_ENV */ } 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) { struct AFS_UCRED *oldCred; ssize_t 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, 0, 0x7fffffff, &afs_osi_cred, &resid); AFS_GLOCK(); if (code == 0) { code = asize - resid; afile->offset += code; } else { if (code == ENOSPC) afs_warnuser ("\n\n\n*** Cache partition is FULL - Decrease cachesize!!! ***\n\n"); 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) { extern int afs_cold_shutdown; AFS_STATCNT(shutdown_osifile); if (afs_cold_shutdown) { afs_osicred_initialized = 0; } }