[hcoop/debian/openafs.git] / src / afs / FBSD / osi_file.c

/*
 * 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 <afsconfig.h>
#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;
#ifndef AFS_FBSD80_ENV	/* cr_groups is now malloc()'d */
afs_ucred_t afs_osi_cred;
#endif
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 = osi_AllocSmallSpace(sizeof(struct osi_file));
    AFS_GUNLOCK();
    code = VFS_VGET(afs_cacheVfsp, (ino_t) ainode->ufs, LK_EXCLUSIVE, &vp);
    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);
#else
    VOP_UNLOCK(vp, 0, curthread);
#endif
    afile->vnode = vp;
    afile->size = VTOI(vp)->i_size;
    afile->offset = 0;
    afile->proc = NULL;
    return (void *)afile;
}

int
afs_osi_Stat(struct osi_file *afile, struct osi_stat *astat)
{
    afs_int32 code;
    struct vattr tvattr;
    AFS_STATCNT(osi_Stat);
    AFS_GUNLOCK();
#if defined(AFS_FBSD80_ENV)
    vn_lock(afile->vnode, LK_EXCLUSIVE | LK_RETRY);
    code = VOP_GETATTR(afile->vnode, &tvattr, afs_osi_credp);
    VOP_UNLOCK(afile->vnode, 0);
#else
    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);
#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;
    }
    return code;
}

int
osi_UFSClose(struct osi_file *afile)
{
    AFS_STATCNT(osi_Close);
    if (afile->vnode) {
	AFS_RELE(afile->vnode);
    }

    osi_FreeSmallSpace(afile);
    return 0;
}

int
osi_UFSTruncate(struct osi_file *afile, afs_int32 asize)
{
    struct vattr tvattr;
    struct vnode *vp;
    afs_int32 code, glocked;
    AFS_STATCNT(osi_Truncate);

    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);
#else
    vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, curthread);
    code = VOP_GETATTR(afile->vnode, &tvattr, afs_osi_credp, curthread);
#endif
    if (code != 0 || tvattr.va_size <= asize)
	goto out;

    VATTR_NULL(&tvattr);
    tvattr.va_size = asize;
#if defined(AFS_FBSD80_ENV)
    code = VOP_SETATTR(vp, &tvattr, afs_osi_credp);
#else
    code = VOP_SETATTR(vp, &tvattr, afs_osi_credp, curthread);
#endif

out:
#if defined(AFS_FBSD80_ENV)
    VOP_UNLOCK(vp, 0);
#else
    VOP_UNLOCK(vp, LK_EXCLUSIVE, curthread);
#endif
    if (glocked)
      AFS_GLOCK();
    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(struct osi_file *afile, int offset, void *aptr,
	     afs_int32 asize)
{
#if (__FreeBSD_version >= 900505 && __FreeBSD_Version < 1000000) ||__FreeBSD_version >= 1000009
    ssize_t resid;
#else
    int resid;
#endif
    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 == AFS_RUNNING)
	    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, (int)resid,
		   ICL_TYPE_INT32, code);
	if (code > 0) {
	    code = -code;
	}
    }
    return code;
}

/* Generic write interface */
int
afs_osi_Write(struct osi_file *afile, afs_int32 offset, void *aptr,
	      afs_int32 asize)
{
#if (__FreeBSD_version >= 900505 && __FreeBSD_Version < 1000000) ||__FreeBSD_version >= 1000009
    ssize_t resid;
#else
    int resid;
#endif
    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 {
	if (code > 0) {
	    code = -code;
	}
    }
    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) (), 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;
    }
}
Commit	Line	Data
805e021f CE	1	/*
	2	* Copyright 2000, International Business Machines Corporation and others.
	3	* All Rights Reserved.
	4	*
	5	* This software has been released under the terms of the IBM Public
	6	* License. For details, see the LICENSE file in the top-level source
	7	* directory or online at http://www.openafs.org/dl/license10.html
	8	*/
	9
	10	#include <afsconfig.h>
	11	#include "afs/param.h"
	12
	13
	14	#include "afs/sysincludes.h" /* Standard vendor system headers */
	15	#include "afsincludes.h" /* Afs-based standard headers */
	16	#include "afs/afs_stats.h" /* afs statistics */
	17
	18
	19	int afs_osicred_initialized = 0;
	20	#ifndef AFS_FBSD80_ENV /* cr_groups is now malloc()'d */
	21	afs_ucred_t afs_osi_cred;
	22	#endif
	23	extern struct osi_dev cacheDev;
	24	extern struct mount *afs_cacheVfsp;
	25
	26
	27	void *
	28	osi_UFSOpen(afs_dcache_id_t *ainode)
	29	{
	30	struct osi_file *afile;
	31	struct vnode *vp;
	32	extern int cacheDiskType;
	33	afs_int32 code;
	34
	35	AFS_STATCNT(osi_UFSOpen);
	36	if (cacheDiskType != AFS_FCACHE_TYPE_UFS)
	37	osi_Panic("UFSOpen called for non-UFS cache\n");
	38	afile = osi_AllocSmallSpace(sizeof(struct osi_file));
	39	AFS_GUNLOCK();
	40	code = VFS_VGET(afs_cacheVfsp, (ino_t) ainode->ufs, LK_EXCLUSIVE, &vp);
	41	AFS_GLOCK();
	42	if (code == 0 && vp->v_type == VNON)
	43	code = ENOENT;
	44	if (code) {
	45	osi_FreeSmallSpace(afile);
	46	osi_Panic("UFSOpen: igetinode failed");
	47	}
	48	#if defined(AFS_FBSD80_ENV)
	49	VOP_UNLOCK(vp, 0);
	50	#else
	51	VOP_UNLOCK(vp, 0, curthread);
	52	#endif
	53	afile->vnode = vp;
	54	afile->size = VTOI(vp)->i_size;
	55	afile->offset = 0;
	56	afile->proc = NULL;
	57	return (void *)afile;
	58	}
	59
	60	int
	61	afs_osi_Stat(struct osi_file afile, struct osi_stat astat)
	62	{
	63	afs_int32 code;
	64	struct vattr tvattr;
65	AFS_STATCNT(osi_Stat);
66	AFS_GUNLOCK();
67	#if defined(AFS_FBSD80_ENV)
68	vn_lock(afile->vnode, LK_EXCLUSIVE \| LK_RETRY);
69	code = VOP_GETATTR(afile->vnode, &tvattr, afs_osi_credp);
70	VOP_UNLOCK(afile->vnode, 0);
71	#else
72	vn_lock(afile->vnode, LK_EXCLUSIVE \| LK_RETRY, curthread);
73	code = VOP_GETATTR(afile->vnode, &tvattr, afs_osi_credp, curthread);
74	VOP_UNLOCK(afile->vnode, LK_EXCLUSIVE, curthread);
75	#endif
76	AFS_GLOCK();
77	if (code == 0) {
78	astat->size = tvattr.va_size;
79	astat->mtime = tvattr.va_mtime.tv_sec;
80	astat->atime = tvattr.va_atime.tv_sec;
81	}
82	return code;
83	}
84
85	int
86	osi_UFSClose(struct osi_file *afile)
87	{
88	AFS_STATCNT(osi_Close);
89	if (afile->vnode) {
90	AFS_RELE(afile->vnode);
91	}
92
93	osi_FreeSmallSpace(afile);
94	return 0;
95	}
96
97	int
98	osi_UFSTruncate(struct osi_file *afile, afs_int32 asize)
99	{
100	struct vattr tvattr;
101	struct vnode *vp;
102	afs_int32 code, glocked;
103	AFS_STATCNT(osi_Truncate);
104
105	vp = afile->vnode;
106	/*
107	* This routine only shrinks files, and most systems
108	* have very slow truncates, even when the file is already
109	* small enough. Check now and save some time.
110	*/
111	glocked = ISAFS_GLOCK();
112	if (glocked)
113	AFS_GUNLOCK();
114	#if defined(AFS_FBSD80_ENV)
115	vn_lock(vp, LK_EXCLUSIVE \| LK_RETRY);
116	code = VOP_GETATTR(afile->vnode, &tvattr, afs_osi_credp);
117	#else
118	vn_lock(vp, LK_EXCLUSIVE \| LK_RETRY, curthread);
119	code = VOP_GETATTR(afile->vnode, &tvattr, afs_osi_credp, curthread);
120	#endif
121	if (code != 0 \|\| tvattr.va_size <= asize)
122	goto out;
123
124	VATTR_NULL(&tvattr);
125	tvattr.va_size = asize;
126	#if defined(AFS_FBSD80_ENV)
127	code = VOP_SETATTR(vp, &tvattr, afs_osi_credp);
128	#else
129	code = VOP_SETATTR(vp, &tvattr, afs_osi_credp, curthread);
130	#endif
131
132	out:
133	#if defined(AFS_FBSD80_ENV)
134	VOP_UNLOCK(vp, 0);
135	#else
136	VOP_UNLOCK(vp, LK_EXCLUSIVE, curthread);
137	#endif
138	if (glocked)
139	AFS_GLOCK();
140	return code;
141	}
142
143	void
144	osi_DisableAtimes(struct vnode *avp)
145	{
146	struct inode *ip = VTOI(avp);
147	ip->i_flag &= ~IN_ACCESS;
148	}
149
150
151	/* Generic read interface */
152	int
153	afs_osi_Read(struct osi_file afile, int offset, void aptr,
154	afs_int32 asize)
155	{
156	#if (__FreeBSD_version >= 900505 && __FreeBSD_Version < 1000000) \|\|__FreeBSD_version >= 1000009
157	ssize_t resid;
158	#else
159	int resid;
160	#endif
161	afs_int32 code;
162	AFS_STATCNT(osi_Read);
163
164	/**
165	* If the osi_file passed in is NULL, panic only if AFS is not shutting
166	* down. No point in crashing when we are already shutting down
167	*/
168	if (!afile) {
169	if (afs_shuttingdown == AFS_RUNNING)
170	osi_Panic("osi_Read called with null param");
171	else
172	return -EIO;
173	}
174
175	if (offset != -1)
176	afile->offset = offset;
177	AFS_GUNLOCK();
178	code =
179	gop_rdwr(UIO_READ, afile->vnode, (caddr_t) aptr, asize, afile->offset,
180	AFS_UIOSYS, IO_UNIT, afs_osi_credp, &resid);
181	AFS_GLOCK();
182	if (code == 0) {
183	code = asize - resid;
184	afile->offset += code;
185	osi_DisableAtimes(afile->vnode);
186	} else {
187	afs_Trace2(afs_iclSetp, CM_TRACE_READFAILED, ICL_TYPE_INT32, (int)resid,
188	ICL_TYPE_INT32, code);
189	if (code > 0) {
190	code = -code;
191	}
192	}
193	return code;
194	}
195
196	/* Generic write interface */
197	int
198	afs_osi_Write(struct osi_file afile, afs_int32 offset, void aptr,
199	afs_int32 asize)
200	{
201	#if (__FreeBSD_version >= 900505 && __FreeBSD_Version < 1000000) \|\|__FreeBSD_version >= 1000009
202	ssize_t resid;
203	#else
204	int resid;
205	#endif
206	afs_int32 code;
207	AFS_STATCNT(osi_Write);
208	if (!afile)
209	osi_Panic("afs_osi_Write called with null param");
210	if (offset != -1)
211	afile->offset = offset;
212	{
213	AFS_GUNLOCK();
214	code =
215	gop_rdwr(UIO_WRITE, afile->vnode, (caddr_t) aptr, asize,
216	afile->offset, AFS_UIOSYS, IO_UNIT, afs_osi_credp,
217	&resid);
218	AFS_GLOCK();
219	}
220	if (code == 0) {
221	code = asize - resid;
222	afile->offset += code;
223	} else {
224	if (code > 0) {
225	code = -code;
226	}
227	}
228	if (afile->proc) {
229	(*afile->proc) (afile, code);
230	}
231	return code;
232	}
233
234
235	/* This work should be handled by physstrat in ca/machdep.c.
236	This routine written from the RT NFS port strategy routine.
237	It has been generalized a bit, but should still be pretty clear. */
238	int
239	afs_osi_MapStrategy(int (aproc) (), struct buf bp)
240	{
241	afs_int32 returnCode;
242
243	AFS_STATCNT(osi_MapStrategy);
244	returnCode = (*aproc) (bp);
245
246	return returnCode;
247	}
248
249
250
251	void
252	shutdown_osifile(void)
253	{
254	AFS_STATCNT(shutdown_osifile);
255	if (afs_cold_shutdown) {
256	afs_osicred_initialized = 0;
257	}
258	}