-/* Copyright (C) 1995, 1989, 1998 Transarc Corporation - All rights reserved */
/*
- * (C) COPYRIGHT IBM CORPORATION 1987, 1988
- * LICENSED MATERIALS - PROPERTY OF IBM
+ * 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
*/
+
/*
- *
* Linux specific vnodeops. Also includes the glue routines required to call
* AFS vnodeops. The "NOTUSED" #define is used to indicate routines and
* calling sequences present in an ops table that we don't actually use.
* stat calls.
*/
-#include "../afs/param.h"
-#include "../afs/sysincludes.h"
-#include "../afs/afsincludes.h"
-#include "../afs/afs_stats.h"
-#include "../h/mm.h"
-#include "../h/pagemap.h"
+#include <afsconfig.h>
+#include "afs/param.h"
+
+RCSID
+ ("$Header$");
+
+#include "afs/sysincludes.h"
+#include "afsincludes.h"
+#include "afs/afs_stats.h"
+#include "afs/afs_osidnlc.h"
+#include "h/mm.h"
+#include "h/pagemap.h"
+#if defined(AFS_LINUX24_ENV)
+#include "h/smp_lock.h"
+#endif
+
+#ifdef pgoff2loff
+#define pageoff(pp) pgoff2loff((pp)->index)
+#else
+#define pageoff(pp) pp->offset
+#endif
extern struct vcache *afs_globalVp;
+extern afs_rwlock_t afs_xvcache;
extern struct dentry_operations *afs_dops;
+#if defined(AFS_LINUX24_ENV)
+extern struct inode_operations afs_file_iops;
+extern struct address_space_operations afs_file_aops;
+struct address_space_operations afs_symlink_aops;
+#endif
extern struct inode_operations afs_dir_iops;
extern struct inode_operations afs_symlink_iops;
#ifdef NOTUSED
-static int afs_linux_lseek(struct inode *ip, struct file *fp, off_t, int) {}
+static int
+afs_linux_lseek(struct inode *ip, struct file *fp, off_t, int)
+{
+}
#endif
-static ssize_t afs_linux_read(struct file *fp, char *buf, size_t count,
- loff_t *offp)
+static ssize_t
+afs_linux_read(struct file *fp, char *buf, size_t count, loff_t * offp)
{
ssize_t code;
- struct vcache *vcp = (struct vcache*)fp->f_dentry->d_inode;
+ struct vcache *vcp = ITOAFS(fp->f_dentry->d_inode);
cred_t *credp = crref();
struct vrequest treq;
AFS_GLOCK();
afs_Trace4(afs_iclSetp, CM_TRACE_READOP, ICL_TYPE_POINTER, vcp,
- ICL_TYPE_INT32, (int)*offp,
- ICL_TYPE_INT32, count,
- ICL_TYPE_INT32, 99999);
+ ICL_TYPE_OFFSET, offp, ICL_TYPE_INT32, count, ICL_TYPE_INT32,
+ 99999);
/* get a validated vcache entry */
code = afs_InitReq(&treq, credp);
if (code)
code = -code;
else {
- osi_FlushPages(vcp, credp); /* ensure stale pages are gone */
- AFS_GUNLOCK();
- code = generic_file_read(fp, buf, count, offp);
- AFS_GLOCK();
+#ifdef AFS_64BIT_CLIENT
+ if (*offp + count > afs_vmMappingEnd) {
+ uio_t tuio;
+ struct iovec iov;
+ afs_size_t oldOffset = *offp;
+ afs_int32 xfered = 0;
+
+ if (*offp < afs_vmMappingEnd) {
+ /* special case of a buffer crossing the VM mapping end */
+ afs_int32 tcount = afs_vmMappingEnd - *offp;
+ count -= tcount;
+ osi_FlushPages(vcp, credp); /* ensure stale pages are gone */
+ AFS_GUNLOCK();
+ code = generic_file_read(fp, buf, tcount, offp);
+ AFS_GLOCK();
+ if (code != tcount) {
+ goto done;
+ }
+ xfered = tcount;
+ }
+ setup_uio(&tuio, &iov, buf + xfered, (afs_offs_t) * offp, count,
+ UIO_READ, AFS_UIOSYS);
+ code = afs_read(vcp, &tuio, credp, 0, 0, 0);
+ xfered += count - tuio.uio_resid;
+ if (code != 0) {
+ afs_Trace4(afs_iclSetp, CM_TRACE_READOP, ICL_TYPE_POINTER,
+ vcp, ICL_TYPE_OFFSET, offp, ICL_TYPE_INT32, -1,
+ ICL_TYPE_INT32, code);
+ code = xfered;
+ *offp += count - tuio.uio_resid;
+ } else {
+ code = xfered;
+ *offp += count;
+ }
+ done:
+ } else {
+#endif /* AFS_64BIT_CLIENT */
+ osi_FlushPages(vcp, credp); /* ensure stale pages are gone */
+ AFS_GUNLOCK();
+ code = generic_file_read(fp, buf, count, offp);
+ AFS_GLOCK();
+#ifdef AFS_64BIT_CLIENT
+ }
+#endif /* AFS_64BIT_CLIENT */
}
afs_Trace4(afs_iclSetp, CM_TRACE_READOP, ICL_TYPE_POINTER, vcp,
- ICL_TYPE_INT32, (int)*offp,
- ICL_TYPE_INT32, count,
- ICL_TYPE_INT32, code);
+ ICL_TYPE_OFFSET, offp, ICL_TYPE_INT32, count, ICL_TYPE_INT32,
+ code);
AFS_GUNLOCK();
crfree(credp);
* also takes care of re-positioning the pointer if file is open in append
* mode. Call fake open/close to ensure we do writes of core dumps.
*/
-static ssize_t afs_linux_write(struct file *fp, const char *buf, size_t count,
- loff_t *offp)
+static ssize_t
+afs_linux_write(struct file *fp, const char *buf, size_t count, loff_t * offp)
{
ssize_t code = 0;
int code2;
- struct vcache *vcp = (struct vcache *)fp->f_dentry->d_inode;
+ struct vcache *vcp = ITOAFS(fp->f_dentry->d_inode);
struct vrequest treq;
cred_t *credp = crref();
+ afs_offs_t toffs;
AFS_GLOCK();
afs_Trace4(afs_iclSetp, CM_TRACE_WRITEOP, ICL_TYPE_POINTER, vcp,
- ICL_TYPE_INT32, (int)*offp, ICL_TYPE_INT32, count,
- ICL_TYPE_INT32, (fp->f_flags & O_APPEND) ? 99998 : 99999);
+ ICL_TYPE_OFFSET, offp, ICL_TYPE_INT32, count, ICL_TYPE_INT32,
+ (fp->f_flags & O_APPEND) ? 99998 : 99999);
/* get a validated vcache entry */
- code = (ssize_t)afs_InitReq(&treq, credp);
+ code = (ssize_t) afs_InitReq(&treq, credp);
if (!code)
- code = (ssize_t)afs_VerifyVCache(vcp, &treq);
+ code = (ssize_t) afs_VerifyVCache(vcp, &treq);
ObtainWriteLock(&vcp->lock, 529);
afs_FakeOpen(vcp);
ReleaseWriteLock(&vcp->lock);
- AFS_GUNLOCK();
if (code)
code = -code;
else {
- code = generic_file_write(fp, buf, count, offp);
+#ifdef AFS_64BIT_CLIENT
+ toffs = *offp;
+ if (fp->f_flags & O_APPEND)
+ toffs += vcp->m.Length;
+ if (toffs + count > afs_vmMappingEnd) {
+ uio_t tuio;
+ struct iovec iov;
+ afs_size_t oldOffset = *offp;
+ afs_int32 xfered = 0;
+
+ if (toffs < afs_vmMappingEnd) {
+ /* special case of a buffer crossing the VM mapping end */
+ afs_int32 tcount = afs_vmMappingEnd - *offp;
+ count -= tcount;
+ AFS_GUNLOCK();
+ code = generic_file_write(fp, buf, tcount, offp);
+ AFS_GLOCK();
+ if (code != tcount) {
+ goto done;
+ }
+ xfered = tcount;
+ toffs += tcount;
+ }
+ setup_uio(&tuio, &iov, buf + xfered, (afs_offs_t) toffs, count,
+ UIO_WRITE, AFS_UIOSYS);
+ code = afs_write(vcp, &tuio, fp->f_flags, credp, 0);
+ xfered += count - tuio.uio_resid;
+ if (code != 0) {
+ code = xfered;
+ *offp += count - tuio.uio_resid;
+ } else {
+ /* Purge dirty chunks of file if there are too many dirty chunks.
+ * Inside the write loop, we only do this at a chunk boundary.
+ * Clean up partial chunk if necessary at end of loop.
+ */
+ if (AFS_CHUNKBASE(tuio.afsio_offset) !=
+ AFS_CHUNKBASE(oldOffset)) {
+ ObtainWriteLock(&vcp->lock, 402);
+ code = afs_DoPartialWrite(vcp, &treq);
+ vcp->states |= CDirty;
+ ReleaseWriteLock(&vcp->lock);
+ }
+ code = xfered;
+ *offp += count;
+ toffs += count;
+ ObtainWriteLock(&vcp->lock, 400);
+ vcp->m.Date = osi_Time(); /* Set file date (for ranlib) */
+ /* extend file */
+ if (!(fp->f_flags & O_APPEND) && toffs > vcp->m.Length) {
+ vcp->m.Length = toffs;
+ }
+ ReleaseWriteLock(&vcp->lock);
+ }
+ done:
+ } else {
+#endif /* AFS_64BIT_CLIENT */
+ AFS_GUNLOCK();
+ code = generic_file_write(fp, buf, count, offp);
+ AFS_GLOCK();
+#ifdef AFS_64BIT_CLIENT
+ }
+#endif /* AFS_64BIT_CLIENT */
}
- AFS_GLOCK();
ObtainWriteLock(&vcp->lock, 530);
- vcp->m.Date = osi_Time(); /* set modification time */
+ vcp->m.Date = osi_Time(); /* set modification time */
afs_FakeClose(vcp, credp);
- if (code>=0)
+ if (code >= 0)
code2 = afs_DoPartialWrite(vcp, &treq);
- if (code2 && code >=0)
- code = (ssize_t) -code2;
+ if (code2 && code >= 0)
+ code = (ssize_t) - code2;
ReleaseWriteLock(&vcp->lock);
-
+
afs_Trace4(afs_iclSetp, CM_TRACE_WRITEOP, ICL_TYPE_POINTER, vcp,
- ICL_TYPE_INT32, (int)*offp, ICL_TYPE_INT32, count,
- ICL_TYPE_INT32, code);
+ ICL_TYPE_OFFSET, offp, ICL_TYPE_INT32, count, ICL_TYPE_INT32,
+ code);
AFS_GUNLOCK();
crfree(credp);
* filldir instead of afs_readdir_move. Note that changes to vcache/dcache
* handling and use of bulkstats will need to be reflected here as well.
*/
-static int afs_linux_readdir(struct file *fp,
- void *dirbuf, filldir_t filldir)
+static int
+afs_linux_readdir(struct file *fp, void *dirbuf, filldir_t filldir)
{
- struct vcache *avc = (struct vcache*)FILE_INODE(fp);
+ extern struct DirEntry *afs_dir_GetBlob();
+ struct vcache *avc = ITOAFS(FILE_INODE(fp));
struct vrequest treq;
register struct dcache *tdc;
int code;
struct DirEntry *de;
ino_t ino;
int len;
- int origOffset;
+ afs_size_t origOffset, tlen;
cred_t *credp = crref();
+ struct afs_fakestat_state fakestat;
AFS_GLOCK();
AFS_STATCNT(afs_readdir);
return -code;
}
+ afs_InitFakeStat(&fakestat);
+ code = afs_EvalFakeStat(&avc, &fakestat, &treq);
+ if (code) {
+ afs_PutFakeStat(&fakestat);
+ AFS_GUNLOCK();
+ return -code;
+ }
+
/* update the cache entry */
-tagain:
+ tagain:
code = afs_VerifyVCache(avc, &treq);
if (code) {
+ afs_PutFakeStat(&fakestat);
AFS_GUNLOCK();
return -code;
}
/* get a reference to the entire directory */
- tdc = afs_GetDCache(avc, 0, &treq, &origOffset, &len, 1);
+ tdc = afs_GetDCache(avc, (afs_size_t) 0, &treq, &origOffset, &tlen, 1);
+ len = tlen;
if (!tdc) {
+ afs_PutFakeStat(&fakestat);
AFS_GUNLOCK();
return -ENOENT;
}
ObtainReadLock(&avc->lock);
+ ObtainReadLock(&tdc->lock);
/*
* Make sure that the data in the cache is current. There are two
* cases we need to worry about:
* 2. The cache data is no longer valid
*/
while ((avc->states & CStatd)
- && (tdc->flags & DFFetching)
+ && (tdc->dflags & DFFetching)
&& hsame(avc->m.DataVersion, tdc->f.versionNo)) {
- tdc->flags |= DFWaiting;
+ ReleaseReadLock(&tdc->lock);
ReleaseReadLock(&avc->lock);
afs_osi_Sleep(&tdc->validPos);
ObtainReadLock(&avc->lock);
+ ObtainReadLock(&tdc->lock);
}
if (!(avc->states & CStatd)
|| !hsame(avc->m.DataVersion, tdc->f.versionNo)) {
+ ReleaseReadLock(&tdc->lock);
ReleaseReadLock(&avc->lock);
afs_PutDCache(tdc);
goto tagain;
*/
code = 0;
offset = (int)fp->f_pos;
- while(1) {
+ while (1) {
dirpos = BlobScan(&tdc->f.inode, offset);
if (!dirpos)
break;
- de = (struct DirEntry*)afs_dir_GetBlob(&tdc->f.inode, dirpos);
+ de = afs_dir_GetBlob(&tdc->f.inode, dirpos);
if (!de)
break;
ino = (avc->fid.Fid.Volume << 16) + ntohl(de->fid.vnode);
- ino &= 0x7fffffff; /* Assumes 32 bit ino_t ..... */
- len = strlen(de->name);
+ ino &= 0x7fffffff; /* Assumes 32 bit ino_t ..... */
+ if (de->name)
+ len = strlen(de->name);
+ else {
+ printf("afs_linux_readdir: afs_dir_GetBlob failed, null name (inode %x, dirpos %d)\n",
+ &tdc->f.inode, dirpos);
+ DRelease(de, 0);
+ afs_PutDCache(tdc);
+ ReleaseReadLock(&avc->lock);
+ afs_PutFakeStat(&fakestat);
+ return -ENOENT;
+ }
/* filldir returns -EINVAL when the buffer is full. */
- code = (*filldir)(dirbuf, de->name, len, offset, ino);
+#if (defined(AFS_LINUX24_ENV) || defined(pgoff2loff)) && defined(DECLARE_FSTYPE)
+ {
+ unsigned int type = DT_UNKNOWN;
+ struct VenusFid afid;
+ struct vcache *tvc;
+ int vtype;
+ afid.Cell = avc->fid.Cell;
+ afid.Fid.Volume = avc->fid.Fid.Volume;
+ afid.Fid.Vnode = ntohl(de->fid.vnode);
+ afid.Fid.Unique = ntohl(de->fid.vunique);
+ if ((avc->states & CForeign) == 0 && (ntohl(de->fid.vnode) & 1)) {
+ type = DT_DIR;
+ } else if ((tvc = afs_FindVCache(&afid, 0, 0))) {
+ if (tvc->mvstat) {
+ type = DT_DIR;
+ } else if (((tvc->states) & (CStatd | CTruth))) {
+ /* CTruth will be set if the object has
+ *ever* been statd */
+ vtype = vType(tvc);
+ if (vtype == VDIR)
+ type = DT_DIR;
+ else if (vtype == VREG)
+ type = DT_REG;
+ /* Don't do this until we're sure it can't be a mtpt */
+ /* else if (vtype == VLNK)
+ * type=DT_LNK; */
+ /* what other types does AFS support? */
+ }
+ /* clean up from afs_FindVCache */
+ afs_PutVCache(tvc);
+ }
+ code = (*filldir) (dirbuf, de->name, len, offset, ino, type);
+ }
+#else
+ code = (*filldir) (dirbuf, de->name, len, offset, ino);
+#endif
DRelease(de, 0);
if (code)
break;
- offset = dirpos + 1 + ((len+16)>>5);
+ offset = dirpos + 1 + ((len + 16) >> 5);
}
/* If filldir didn't fill in the last one this is still pointing to that
* last attempt.
*/
- fp->f_pos = (loff_t)offset;
+ fp->f_pos = (loff_t) offset;
+ ReleaseReadLock(&tdc->lock);
afs_PutDCache(tdc);
ReleaseReadLock(&avc->lock);
+ afs_PutFakeStat(&fakestat);
AFS_GUNLOCK();
return 0;
}
#endif
/* in afs_pioctl.c */
-extern int afs_xioctl(struct inode *ip, struct file *fp,
- unsigned int com, unsigned long arg);
+extern int afs_xioctl(struct inode *ip, struct file *fp, unsigned int com,
+ unsigned long arg);
/* We need to detect unmap's after close. To do that, we need our own
static struct vm_operations_struct afs_shared_mmap_ops;
static int afs_shared_mmap_ops_inited = 0;
-void afs_linux_vma_close(struct vm_area_struct *vmap)
+void
+afs_linux_vma_close(struct vm_area_struct *vmap)
{
struct vcache *vcp;
cred_t *credp;
+ int need_unlock = 0;
if (!vmap->vm_file)
return;
- vcp = (struct vcache*)FILE_INODE(vmap->vm_file);
+ vcp = ITOAFS(FILE_INODE(vmap->vm_file));
if (!vcp)
return;
AFS_GLOCK();
- afs_Trace4(afs_iclSetp, CM_TRACE_VM_CLOSE,
- ICL_TYPE_POINTER, vcp,
- ICL_TYPE_INT32, vcp->mapcnt,
- ICL_TYPE_INT32, vcp->opens,
+ afs_Trace4(afs_iclSetp, CM_TRACE_VM_CLOSE, ICL_TYPE_POINTER, vcp,
+ ICL_TYPE_INT32, vcp->mapcnt, ICL_TYPE_INT32, vcp->opens,
ICL_TYPE_INT32, vcp->execsOrWriters);
- ObtainWriteLock(&vcp->lock, 532);
+ if ((&vcp->lock)->excl_locked == 0 || (&vcp->lock)->pid_writer == MyPidxx) {
+ ObtainWriteLock(&vcp->lock, 532);
+ need_unlock = 1;
+ } else
+ printk("AFS_VMA_CLOSE(%d): Skipping Already locked vcp=%p vmap=%p\n",
+ MyPidxx, &vcp, &vmap);
if (vcp->mapcnt) {
vcp->mapcnt--;
- ReleaseWriteLock(&vcp->lock);
+ if (need_unlock)
+ ReleaseWriteLock(&vcp->lock);
if (!vcp->mapcnt) {
- credp = crref();
- (void) afs_close(vcp, vmap->vm_file->f_flags, credp);
- /* only decrement the execsOrWriters flag if this is not a writable
- * file. */
- if (! (vmap->vm_file->f_flags & (FWRITE | FTRUNC)))
+ if (need_unlock && vcp->execsOrWriters < 2) {
+ credp = crref();
+ (void)afs_close(vcp, vmap->vm_file->f_flags, credp);
+ /* only decrement the execsOrWriters flag if this is not a
+ * writable file. */
+ if (!(vmap->vm_file->f_flags & (FWRITE | FTRUNC)))
+ vcp->execsOrWriters--;
+ vcp->states &= ~CMAPPED;
+ crfree(credp);
+ } else if ((vmap->vm_file->f_flags & (FWRITE | FTRUNC)))
vcp->execsOrWriters--;
-
- vcp->states &= ~CMAPPED;
- crfree(credp);
+ /* If we did not have the lock */
+ if (!need_unlock) {
+ vcp->mapcnt++;
+ if (!vcp->execsOrWriters)
+ vcp->execsOrWriters = 1;
+ }
}
- }
- else {
- ReleaseWriteLock(&vcp->lock);
+ } else {
+ if (need_unlock)
+ ReleaseWriteLock(&vcp->lock);
}
- unlock_exit:
+ unlock_exit:
AFS_GUNLOCK();
}
-static int afs_linux_mmap(struct file *fp, struct vm_area_struct *vmap)
+static int
+afs_linux_mmap(struct file *fp, struct vm_area_struct *vmap)
{
- struct vcache *vcp = (struct vcache*)FILE_INODE(fp);
+ struct vcache *vcp = ITOAFS(FILE_INODE(fp));
cred_t *credp = crref();
struct vrequest treq;
int code;
AFS_GLOCK();
+#if defined(AFS_LINUX24_ENV)
+ afs_Trace3(afs_iclSetp, CM_TRACE_GMAP, ICL_TYPE_POINTER, vcp,
+ ICL_TYPE_POINTER, vmap->vm_start, ICL_TYPE_INT32,
+ vmap->vm_end - vmap->vm_start);
+#else
afs_Trace4(afs_iclSetp, CM_TRACE_GMAP, ICL_TYPE_POINTER, vcp,
- ICL_TYPE_POINTER, vmap->vm_start,
- ICL_TYPE_INT32, vmap->vm_end - vmap->vm_start,
- ICL_TYPE_INT32, vmap->vm_offset);
+ ICL_TYPE_POINTER, vmap->vm_start, ICL_TYPE_INT32,
+ vmap->vm_end - vmap->vm_start, ICL_TYPE_INT32,
+ vmap->vm_offset);
+#endif
/* get a validated vcache entry */
code = afs_InitReq(&treq, credp);
AFS_GLOCK();
}
- ObtainWriteLock(&vcp->lock,531);
- /* Set out vma ops so we catch the close. The following test should be
- * the same as used in generic_file_mmap.
- */
- if ((vmap->vm_flags & VM_SHARED) && (vmap->vm_flags & VM_MAYWRITE)) {
- if (!afs_shared_mmap_ops_inited) {
- afs_shared_mmap_ops_inited = 1;
- afs_shared_mmap_ops = *vmap->vm_ops;
- afs_shared_mmap_ops.close = afs_linux_vma_close;
+ if (code == 0) {
+ ObtainWriteLock(&vcp->lock, 531);
+ /* Set out vma ops so we catch the close. The following test should be
+ * the same as used in generic_file_mmap.
+ */
+ if ((vmap->vm_flags & VM_SHARED) && (vmap->vm_flags & VM_MAYWRITE)) {
+ if (!afs_shared_mmap_ops_inited) {
+ afs_shared_mmap_ops_inited = 1;
+ afs_shared_mmap_ops = *vmap->vm_ops;
+ afs_shared_mmap_ops.close = afs_linux_vma_close;
+ }
+ vmap->vm_ops = &afs_shared_mmap_ops;
+ } else {
+ if (!afs_private_mmap_ops_inited) {
+ afs_private_mmap_ops_inited = 1;
+ afs_private_mmap_ops = *vmap->vm_ops;
+ afs_private_mmap_ops.close = afs_linux_vma_close;
+ }
+ vmap->vm_ops = &afs_private_mmap_ops;
}
- vmap->vm_ops = &afs_shared_mmap_ops;
- }
- else {
- if (!afs_private_mmap_ops_inited) {
- afs_private_mmap_ops_inited = 1;
- afs_private_mmap_ops = *vmap->vm_ops;
- afs_private_mmap_ops.close = afs_linux_vma_close;
+
+
+ /* Add an open reference on the first mapping. */
+ if (vcp->mapcnt == 0) {
+ vcp->execsOrWriters++;
+ vcp->opens++;
+ vcp->states |= CMAPPED;
}
- vmap->vm_ops = &afs_private_mmap_ops;
- }
-
-
- /* Add an open reference on the first mapping. */
- if (vcp->mapcnt == 0) {
- vcp->execsOrWriters++;
- vcp->opens++;
- vcp->states |= CMAPPED;
+ ReleaseWriteLock(&vcp->lock);
+ vcp->mapcnt++;
}
- ReleaseWriteLock(&vcp->lock);
- vcp->mapcnt++;
AFS_GUNLOCK();
crfree(credp);
return code;
}
-int afs_linux_open(struct inode *ip, struct file *fp)
+int
+afs_linux_open(struct inode *ip, struct file *fp)
{
int code;
cred_t *credp = crref();
AFS_GLOCK();
- code = afs_open((struct vcache**)&ip, fp->f_flags, credp);
+#ifdef AFS_LINUX24_ENV
+ lock_kernel();
+#endif
+ code = afs_open((struct vcache **)&ip, fp->f_flags, credp);
+#ifdef AFS_LINUX24_ENV
+ unlock_kernel();
+#endif
AFS_GUNLOCK();
crfree(credp);
* fput. See afs_linux_flush for notes on interactions between release and
* flush.
*/
-static int afs_linux_release(struct inode *ip, struct file *fp)
+static int
+afs_linux_release(struct inode *ip, struct file *fp)
{
int code = 0;
cred_t *credp = crref();
- struct vcache *vcp = (struct vcache*)ip;
+ struct vcache *vcp = ITOAFS(ip);
AFS_GLOCK();
+#ifdef AFS_LINUX24_ENV
+ lock_kernel();
+#endif
if (vcp->flushcnt) {
- vcp->flushcnt--; /* protected by AFS global lock. */
- }
- else {
+ vcp->flushcnt--; /* protected by AFS global lock. */
+ } else {
code = afs_close(vcp, fp->f_flags, credp);
}
+#ifdef AFS_LINUX24_ENV
+ unlock_kernel();
+#endif
AFS_GUNLOCK();
crfree(credp);
return -code;
}
-static int afs_linux_fsync(struct file *fp, struct dentry *dp)
+#if defined(AFS_LINUX24_ENV)
+static int
+afs_linux_fsync(struct file *fp, struct dentry *dp, int datasync)
+#else
+static int
+afs_linux_fsync(struct file *fp, struct dentry *dp)
+#endif
{
int code;
struct inode *ip = FILE_INODE(fp);
cred_t *credp = crref();
AFS_GLOCK();
- code = afs_fsync((struct vcache*)ip, credp);
+#ifdef AFS_LINUX24_ENV
+ lock_kernel();
+#endif
+ code = afs_fsync(ITOAFS(ip), credp);
+#ifdef AFS_LINUX24_ENV
+ unlock_kernel();
+#endif
AFS_GUNLOCK();
crfree(credp);
return -code;
-
+
}
#ifdef NOTUSED
int afs_linux_file_revalidate(kdev_t dev);
#endif /* NOTUSED */
-static int afs_linux_lock(struct file *fp, int cmd, struct file_lock *flp)
+static int
+afs_linux_lock(struct file *fp, int cmd, struct file_lock *flp)
{
int code = 0;
- struct vcache *vcp = (struct vcache*)FILE_INODE(fp);
+ struct vcache *vcp = ITOAFS(FILE_INODE(fp));
cred_t *credp = crref();
+#ifdef AFS_LINUX24_ENV
+ struct flock64 flock;
+#else
struct flock flock;
-
+#endif
+
/* Convert to a lock format afs_lockctl understands. */
- memset((char*)&flock, 0, sizeof(flock));
+ memset((char *)&flock, 0, sizeof(flock));
flock.l_type = flp->fl_type;
flock.l_pid = flp->fl_pid;
flock.l_whence = 0;
flock.l_start = flp->fl_start;
flock.l_len = flp->fl_end - flp->fl_start;
+ /* Safe because there are no large files, yet */
+#if defined(F_GETLK64) && (F_GETLK != F_GETLK64)
+ if (cmd == F_GETLK64)
+ cmd = F_GETLK;
+ else if (cmd == F_SETLK64)
+ cmd = F_SETLK;
+ else if (cmd == F_SETLKW64)
+ cmd = F_SETLKW;
+#endif /* F_GETLK64 && F_GETLK != F_GETLK64 */
+
AFS_GLOCK();
code = afs_lockctl(vcp, &flock, cmd, credp);
AFS_GUNLOCK();
+
+ /* Convert flock back to Linux's file_lock */
+ flp->fl_type = flock.l_type;
+ flp->fl_pid = flock.l_pid;
+ flp->fl_start = flock.l_start;
+ flp->fl_end = flock.l_start + flock.l_len;
+
crfree(credp);
return -code;
-
+
}
/* afs_linux_flush
* on the just flushed file is wasteful, since the background daemon will
* execute the code that finally decides there is nothing to do.
*/
-int afs_linux_flush(struct file *fp)
+int
+afs_linux_flush(struct file *fp)
{
- struct vcache *vcp = (struct vcache *)FILE_INODE(fp);
+ struct vcache *vcp = ITOAFS(FILE_INODE(fp));
int code = 0;
cred_t *credp;
/* Only do this on the last close of the file pointer. */
+#if defined(AFS_LINUX24_ENV)
+ if (atomic_read(&fp->f_count) > 1)
+#else
if (fp->f_count > 1)
+#endif
return 0;
credp = crref();
AFS_GLOCK();
code = afs_close(vcp, fp->f_flags, credp);
- vcp->flushcnt++; /* protected by AFS global lock. */
+ vcp->flushcnt++; /* protected by AFS global lock. */
AFS_GUNLOCK();
crfree(credp);
}
/* Not allowed to directly read a directory. */
-int afs_linux_dir_read(struct file *fp, char *buf, size_t count, loff_t *ppos)
+ssize_t
+afs_linux_dir_read(struct file * fp, char *buf, size_t count, loff_t * ppos)
{
return -EISDIR;
}
+#if defined(AFS_LINUX24_ENV)
+struct file_operations afs_dir_fops = {
+ read:generic_read_dir,
+ readdir:afs_linux_readdir,
+ ioctl:afs_xioctl,
+ open:afs_linux_open,
+ release:afs_linux_release,
+};
+#else
struct file_operations afs_dir_fops = {
- NULL, /* afs_linux_lseek */
+ NULL, /* afs_linux_lseek */
afs_linux_dir_read,
- NULL, /* afs_linux_write */
+ NULL, /* afs_linux_write */
afs_linux_readdir,
- NULL, /* afs_linux_select */
- afs_xioctl, /* close enough to use the ported AFS one */
- NULL, /* afs_linux_mmap */
+ NULL, /* afs_linux_select */
+ afs_xioctl, /* close enough to use the ported AFS one */
+ NULL, /* afs_linux_mmap */
afs_linux_open,
- NULL, /* afs_linux_flush */
+ NULL, /* afs_linux_flush */
afs_linux_release,
afs_linux_fsync,
- NULL, /* afs_linux_fasync */
- NULL, /* afs_linux_check_media_change */
- NULL, /* afs_linux_file_revalidate */
+ NULL, /* afs_linux_fasync */
+ NULL, /* afs_linux_check_media_change */
+ NULL, /* afs_linux_file_revalidate */
afs_linux_lock,
};
+#endif
+#if defined(AFS_LINUX24_ENV)
struct file_operations afs_file_fops = {
- NULL, /* afs_linux_lseek */
+ read:afs_linux_read,
+ write:afs_linux_write,
+ ioctl:afs_xioctl,
+ mmap:afs_linux_mmap,
+ open:afs_linux_open,
+ flush:afs_linux_flush,
+ release:afs_linux_release,
+ fsync:afs_linux_fsync,
+ lock:afs_linux_lock,
+};
+#else
+struct file_operations afs_file_fops = {
+ NULL, /* afs_linux_lseek */
afs_linux_read,
afs_linux_write,
- NULL, /* afs_linux_readdir */
- NULL, /* afs_linux_select */
- afs_xioctl, /* close enough to use the ported AFS one */
+ NULL, /* afs_linux_readdir */
+ NULL, /* afs_linux_select */
+ afs_xioctl, /* close enough to use the ported AFS one */
afs_linux_mmap,
afs_linux_open,
afs_linux_flush,
afs_linux_release,
afs_linux_fsync,
- NULL, /* afs_linux_fasync */
- NULL, /* afs_linux_check_media_change */
- NULL, /* afs_linux_file_revalidate */
+ NULL, /* afs_linux_fasync */
+ NULL, /* afs_linux_check_media_change */
+ NULL, /* afs_linux_file_revalidate */
afs_linux_lock,
};
-
+#endif
+
/**********************************************************************
* AFS Linux dentry operations
/* afs_linux_revalidate
* Ensure vcache is stat'd before use. Return 0 if entry is valid.
*/
-static int afs_linux_revalidate(struct dentry *dp)
+static int
+afs_linux_revalidate(struct dentry *dp)
{
int code;
cred_t *credp;
struct vrequest treq;
- struct vcache *vcp = (struct vcache*)dp->d_inode;
+ struct vcache *vcp = ITOAFS(dp->d_inode);
+ struct vcache *rootvp = NULL;
AFS_GLOCK();
- /* If it's a negative dentry, then there's nothing to do. */
- if (!vcp) {
- AFS_GUNLOCK();
- return 0;
+ if (afs_fakestat_enable && vcp->mvstat == 1 && vcp->mvid
+ && (vcp->states & CMValid) && (vcp->states & CStatd)) {
+ ObtainSharedLock(&afs_xvcache, 680);
+ rootvp = afs_FindVCache(vcp->mvid, 0, 0);
+ ReleaseSharedLock(&afs_xvcache);
}
+#ifdef AFS_LINUX24_ENV
+ lock_kernel();
+#endif
/* Make this a fast path (no crref), since it's called so often. */
if (vcp->states & CStatd) {
- if (*dp->d_name.name != '/' && vcp->mvstat == 2) /* root vnode */
- check_bad_parent(dp); /* check and correct mvid */
- vcache2inode(vcp);
+ if (*dp->d_name.name != '/' && vcp->mvstat == 2) /* root vnode */
+ check_bad_parent(dp); /* check and correct mvid */
+ if (rootvp)
+ vcache2fakeinode(rootvp, vcp);
+ else
+ vcache2inode(vcp);
+#ifdef AFS_LINUX24_ENV
+ unlock_kernel();
+#endif
+ if (rootvp)
+ afs_PutVCache(rootvp);
AFS_GUNLOCK();
return 0;
}
if (!code)
code = afs_VerifyVCache(vcp, &treq);
+#ifdef AFS_LINUX24_ENV
+ unlock_kernel();
+#endif
AFS_GUNLOCK();
crfree(credp);
- return -code ;
+ return -code;
}
-/* Validate a dentry. Return 0 if unchanged, 1 if VFS layer should re-evaluate.
+
+/* Validate a dentry. Return 1 if unchanged, 0 if VFS layer should re-evaluate.
* In kernels 2.2.10 and above, we are passed an additional flags var which
* may have either the LOOKUP_FOLLOW OR LOOKUP_DIRECTORY set in which case
* we are advised to follow the entry if it is a link or to make sure that
* later on, we shouldn't have to do it until later. Perhaps in the future..
*/
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,10)
-static int afs_linux_dentry_revalidate(struct dentry *dp, int flags)
+static int
+afs_linux_dentry_revalidate(struct dentry *dp, int flags)
#else
-static int afs_linux_dentry_revalidate(struct dentry *dp)
+static int
+afs_linux_dentry_revalidate(struct dentry *dp)
#endif
{
- int code;
- cred_t *credp;
+ char *name;
+ cred_t *credp = crref();
struct vrequest treq;
- struct vcache *vcp = (struct vcache*)dp->d_inode;
+ struct vcache *lookupvcp = NULL;
+ int code, bad_dentry = 1;
+ struct sysname_info sysState;
+ struct vcache *vcp = ITOAFS(dp->d_inode);
+ struct vcache *parentvcp = ITOAFS(dp->d_parent->d_inode);
AFS_GLOCK();
+ lock_kernel();
+
+ sysState.allocked = 0;
/* If it's a negative dentry, then there's nothing to do. */
- if (!vcp) {
- AFS_GUNLOCK();
- return 0;
+ if (!vcp || !parentvcp)
+ goto done;
+
+ /* If it is the AFS root, then there's no chance it needs
+ * revalidating */
+ if (vcp == afs_globalVp) {
+ bad_dentry = 0;
+ goto done;
}
- /* Make this a fast path (no crref), since it's called so often. */
- if (vcp->states & CStatd) {
- if (*dp->d_name.name != '/' && vcp->mvstat == 2) /* root vnode */
- check_bad_parent(dp); /* check and correct mvid */
+ if ((code = afs_InitReq(&treq, credp)))
+ goto done;
+
+ Check_AtSys(parentvcp, dp->d_name.name, &sysState, &treq);
+ name = sysState.name;
+
+ /* First try looking up the DNLC */
+ if ((lookupvcp = osi_dnlc_lookup(parentvcp, name, WRITE_LOCK))) {
+ /* Verify that the dentry does not point to an old inode */
+ if (vcp != lookupvcp)
+ goto done;
+ /* Check and correct mvid */
+ if (*name != '/' && vcp->mvstat == 2)
+ check_bad_parent(dp);
vcache2inode(vcp);
- AFS_GUNLOCK();
- return 0;
+ bad_dentry = 0;
+ goto done;
}
- credp = crref();
- code = afs_InitReq(&treq, credp);
- if (!code)
- code = afs_VerifyVCache(vcp, &treq);
+ /* A DNLC lookup failure cannot be trusted. Try a real lookup.
+ Make sure to try the real name and not the @sys expansion;
+ afs_lookup will expand @sys itself. */
+
+ code = afs_lookup(parentvcp, dp->d_name.name, &lookupvcp, credp);
+
+ /* Verify that the dentry does not point to an old inode */
+ if (vcp != lookupvcp)
+ goto done;
+
+ bad_dentry = 0;
+
+ done:
+ /* Clean up */
+ if (lookupvcp)
+ afs_PutVCache(lookupvcp);
+ if (sysState.allocked)
+ osi_FreeLargeSpace(name);
AFS_GUNLOCK();
crfree(credp);
+ if (bad_dentry) {
+ shrink_dcache_parent(dp);
+ d_drop(dp);
+ }
+ unlock_kernel();
+
+ return !bad_dentry;
+}
+
+#ifdef notdef
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,10)
+static int
+afs_linux_dentry_revalidate(struct dentry *dp, int flags)
+#else
+static int
+afs_linux_dentry_revalidate(struct dentry *dp)
+#endif
+{
+ int code;
+ cred_t *credp;
+ struct vrequest treq;
+ struct inode *ip = AFSTOI(dp->d_inode);
+
+ unsigned long timeout = 3 * HZ; /* 3 seconds */
+
+ if (!ip)
+ printk("negative dentry: %s\n", dp->d_name.name);
+
+ if (!(flags & LOOKUP_CONTINUE)) {
+ long diff = CURRENT_TIME - dp->d_parent->d_inode->i_mtime;
+
+ if (diff < 15 * 60)
+ timeout = 0;
+ }
+
+ if (time_after(jiffies, dp->d_time + timeout))
+ goto out_bad;
+
+ out_valid:
return 1;
+
+ out_bad:
+ return 0;
}
+#endif
/* afs_dentry_iput */
-static void afs_dentry_iput(struct dentry *dp, struct inode *ip)
+static void
+afs_dentry_iput(struct dentry *dp, struct inode *ip)
{
- if (ip->i_count == 0 || ip->i_count & 0xffff0000) {
- osi_Panic("Bad refCount %d on inode 0x%x\n",
- ip->i_count, ip);
+ if (ICL_SETACTIVE(afs_iclSetp)) {
+ AFS_GLOCK();
+ afs_Trace3(afs_iclSetp, CM_TRACE_DENTRYIPUT, ICL_TYPE_POINTER, ip,
+ ICL_TYPE_STRING, dp->d_parent->d_name.name,
+ ICL_TYPE_STRING, dp->d_name.name);
+ AFS_GUNLOCK();
}
- ip->i_count --;
- if (!ip->i_count) {
- afs_delete_inode(ip);
+
+ osi_iput(ip);
+}
+
+static int
+afs_dentry_delete(struct dentry *dp)
+{
+ if (ICL_SETACTIVE(afs_iclSetp)) {
+ AFS_GLOCK();
+ afs_Trace3(afs_iclSetp, CM_TRACE_DENTRYDELETE, ICL_TYPE_POINTER,
+ dp->d_inode, ICL_TYPE_STRING, dp->d_parent->d_name.name,
+ ICL_TYPE_STRING, dp->d_name.name);
+ AFS_GUNLOCK();
}
+
+ if (dp->d_inode && (ITOAFS(dp->d_inode)->states & CUnlinked))
+ return 1; /* bad inode? */
+
+ return 0;
}
+#if defined(AFS_LINUX24_ENV)
struct dentry_operations afs_dentry_operations = {
- afs_linux_dentry_revalidate, /* d_validate(struct dentry *) */
- NULL, /* d_hash */
- NULL, /* d_compare */
- NULL, /* d_delete(struct dentry *) */
- NULL, /* d_release(struct dentry *) */
- afs_dentry_iput /* d_iput(struct dentry *, struct inode *) */
+ d_revalidate:afs_linux_dentry_revalidate,
+ d_iput:afs_dentry_iput,
+ d_delete:afs_dentry_delete,
};
struct dentry_operations *afs_dops = &afs_dentry_operations;
+#else
+struct dentry_operations afs_dentry_operations = {
+ afs_linux_dentry_revalidate, /* d_validate(struct dentry *) */
+ NULL, /* d_hash */
+ NULL, /* d_compare */
+ afs_dentry_delete, /* d_delete(struct dentry *) */
+ NULL, /* d_release(struct dentry *) */
+ afs_dentry_iput /* d_iput(struct dentry *, struct inode *) */
+};
+struct dentry_operations *afs_dops = &afs_dentry_operations;
+#endif
/**********************************************************************
* AFS Linux inode operations
*
* name is in kernel space at this point.
*/
-int afs_linux_create(struct inode *dip, struct dentry *dp, int mode)
+int
+afs_linux_create(struct inode *dip, struct dentry *dp, int mode)
{
int code;
cred_t *credp = crref();
vattr.va_mode = mode;
AFS_GLOCK();
- code = afs_create((struct vcache*)dip, name, &vattr, NONEXCL, mode,
- (struct vcache**)&ip, credp);
+ code =
+ afs_create(ITOAFS(dip), name, &vattr, NONEXCL, mode,
+ (struct vcache **)&ip, credp);
if (!code) {
vattr2inode(ip, &vattr);
/* Reset ops if symlink or directory. */
+#if defined(AFS_LINUX24_ENV)
+ if (S_ISREG(ip->i_mode)) {
+ ip->i_op = &afs_file_iops;
+ ip->i_fop = &afs_file_fops;
+ ip->i_data.a_ops = &afs_file_aops;
+ } else if (S_ISDIR(ip->i_mode)) {
+ ip->i_op = &afs_dir_iops;
+ ip->i_fop = &afs_dir_fops;
+ } else if (S_ISLNK(ip->i_mode)) {
+ ip->i_op = &afs_symlink_iops;
+ ip->i_data.a_ops = &afs_symlink_aops;
+ ip->i_mapping = &ip->i_data;
+ } else
+ printk("afs_linux_create: FIXME\n");
+#else
if (S_ISDIR(ip->i_mode))
ip->i_op = &afs_dir_iops;
else if (S_ISLNK(ip->i_mode))
ip->i_op = &afs_symlink_iops;
+#endif
dp->d_op = afs_dops;
+ dp->d_time = jiffies;
d_instantiate(dp, ip);
}
/* afs_linux_lookup */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,10)
-struct dentry *afs_linux_lookup(struct inode *dip, struct dentry *dp)
+struct dentry *
+afs_linux_lookup(struct inode *dip, struct dentry *dp)
#else
-int afs_linux_lookup(struct inode *dip, struct dentry *dp)
+int
+afs_linux_lookup(struct inode *dip, struct dentry *dp)
#endif
{
int code = 0;
cred_t *credp = crref();
- struct vcache *vcp=NULL;
+ struct vcache *vcp = NULL;
const char *comp = dp->d_name.name;
AFS_GLOCK();
- code = afs_lookup((struct vcache *)dip, comp, &vcp, credp);
+ code = afs_lookup(ITOAFS(dip), comp, &vcp, credp);
if (vcp) {
- struct inode *ip = (struct inode*)vcp;
+ struct inode *ip = AFSTOI(vcp);
/* Reset ops if symlink or directory. */
+#if defined(AFS_LINUX24_ENV)
+ if (S_ISREG(ip->i_mode)) {
+ ip->i_op = &afs_file_iops;
+ ip->i_fop = &afs_file_fops;
+ ip->i_data.a_ops = &afs_file_aops;
+ } else if (S_ISDIR(ip->i_mode)) {
+ ip->i_op = &afs_dir_iops;
+ ip->i_fop = &afs_dir_fops;
+ } else if (S_ISLNK(ip->i_mode)) {
+ ip->i_op = &afs_symlink_iops;
+ ip->i_data.a_ops = &afs_symlink_aops;
+ ip->i_mapping = &ip->i_data;
+ } else
+ printk
+ ("afs_linux_lookup: ip->i_mode 0x%x dp->d_name.name %s code %d\n",
+ ip->i_mode, dp->d_name.name, code);
+#else
if (S_ISDIR(ip->i_mode))
ip->i_op = &afs_dir_iops;
else if (S_ISLNK(ip->i_mode))
ip->i_op = &afs_symlink_iops;
+#endif
}
+ dp->d_time = jiffies;
dp->d_op = afs_dops;
- d_add(dp, (struct inode*)vcp);
+ d_add(dp, AFSTOI(vcp));
AFS_GUNLOCK();
crfree(credp);
#endif
}
-int afs_linux_link(struct dentry *olddp, struct inode *dip,
- struct dentry *newdp)
+int
+afs_linux_link(struct dentry *olddp, struct inode *dip, struct dentry *newdp)
{
int code;
cred_t *credp = crref();
d_drop(newdp);
AFS_GLOCK();
- code = afs_link((struct vcache*)oldip, (struct vcache*)dip, name, credp);
+ code = afs_link(ITOAFS(oldip), ITOAFS(dip), name, credp);
AFS_GUNLOCK();
crfree(credp);
return -code;
}
-int afs_linux_unlink(struct inode *dip, struct dentry *dp)
+int
+afs_linux_unlink(struct inode *dip, struct dentry *dp)
{
int code;
cred_t *credp = crref();
const char *name = dp->d_name.name;
- int putback = 0;
-
- if (!list_empty(&dp->d_hash)) {
- d_drop(dp);
- /* Install a definite non-existence if we're the only user. */
- if (dp->d_count == 1)
- putback = 1;
- }
AFS_GLOCK();
- code = afs_remove((struct vcache*)dip, name, credp);
+ code = afs_remove(ITOAFS(dip), name, credp);
AFS_GUNLOCK();
- if (!code) {
- d_delete(dp);
- if (putback)
- d_add(dp, NULL); /* means definitely does _not_ exist */
- }
+ if (!code)
+ d_drop(dp);
crfree(credp);
return -code;
}
-int afs_linux_symlink(struct inode *dip, struct dentry *dp,
- const char *target)
+int
+afs_linux_symlink(struct inode *dip, struct dentry *dp, const char *target)
{
int code;
cred_t *credp = crref();
AFS_GLOCK();
VATTR_NULL(&vattr);
- code = afs_symlink((struct vcache*)dip, name, &vattr, target, credp);
+ code = afs_symlink(ITOAFS(dip), name, &vattr, target, credp);
AFS_GUNLOCK();
crfree(credp);
return -code;
}
-int afs_linux_mkdir(struct inode *dip, struct dentry *dp, int mode)
+int
+afs_linux_mkdir(struct inode *dip, struct dentry *dp, int mode)
{
int code;
cred_t *credp = crref();
VATTR_NULL(&vattr);
vattr.va_mask = ATTR_MODE;
vattr.va_mode = mode;
- code = afs_mkdir((struct vcache*)dip, name, &vattr, &tvcp, credp);
+ code = afs_mkdir(ITOAFS(dip), name, &vattr, &tvcp, credp);
if (tvcp) {
tvcp->v.v_op = &afs_dir_iops;
+#if defined(AFS_LINUX24_ENV)
+ tvcp->v.v_fop = &afs_dir_fops;
+#endif
dp->d_op = afs_dops;
- d_instantiate(dp, (struct inode*)tvcp);
+ dp->d_time = jiffies;
+ d_instantiate(dp, AFSTOI(tvcp));
}
+
AFS_GUNLOCK();
crfree(credp);
return -code;
}
-int afs_linux_rmdir(struct inode *dip, struct dentry *dp)
+int
+afs_linux_rmdir(struct inode *dip, struct dentry *dp)
{
int code;
cred_t *credp = crref();
const char *name = dp->d_name.name;
AFS_GLOCK();
- code = afs_rmdir((struct vcache*)dip, name, credp);
+ code = afs_rmdir(ITOAFS(dip), name, credp);
- /* Linux likes to see ENOTDIR returned from an rmdir() syscall
+ /* Linux likes to see ENOTEMPTY returned from an rmdir() syscall
* that failed because a directory is not empty. So, we map
- * EEXIST to ENOTDIR on linux.
+ * EEXIST to ENOTEMPTY on linux.
*/
if (code == EEXIST) {
- code = ENOTDIR;
+ code = ENOTEMPTY;
}
-
+
if (!code) {
- d_delete(dp);
+ d_drop(dp);
}
AFS_GUNLOCK();
-int afs_linux_rename(struct inode *oldip, struct dentry *olddp,
- struct inode *newip, struct dentry *newdp)
+int
+afs_linux_rename(struct inode *oldip, struct dentry *olddp,
+ struct inode *newip, struct dentry *newdp)
{
int code;
cred_t *credp = crref();
d_drop(newdp);
}
AFS_GLOCK();
- code = afs_rename((struct vcache*)oldip, oldname, (struct vcache*)newip,
- newname, credp);
+ code = afs_rename(ITOAFS(oldip), oldname, ITOAFS(newip), newname, credp);
AFS_GUNLOCK();
- if (!code)
+ if (!code) {
+ /* update time so it doesn't expire immediately */
+ newdp->d_time = jiffies;
d_move(olddp, newdp);
+ }
crfree(credp);
return -code;
* Internal readlink which can return link contents to user or kernel space.
* Note that the buffer is NOT supposed to be null-terminated.
*/
-static int afs_linux_ireadlink(struct inode *ip, char *target, int maxlen,
- uio_seg_t seg)
+static int
+afs_linux_ireadlink(struct inode *ip, char *target, int maxlen, uio_seg_t seg)
{
int code;
cred_t *credp = crref();
uio_t tuio;
struct iovec iov;
- setup_uio(&tuio, &iov, target, 0, maxlen, UIO_READ, seg);
- code = afs_readlink((struct vcache*)ip, &tuio, credp);
+ setup_uio(&tuio, &iov, target, (afs_offs_t) 0, maxlen, UIO_READ, seg);
+ code = afs_readlink(ITOAFS(ip), &tuio, credp);
crfree(credp);
if (!code)
return -code;
}
+#if !defined(AFS_LINUX24_ENV)
/* afs_linux_readlink
* Fill target (which is in user space) with contents of symlink.
*/
-int afs_linux_readlink(struct dentry *dp, char *target, int maxlen)
+int
+afs_linux_readlink(struct dentry *dp, char *target, int maxlen)
{
int code;
struct inode *ip = dp->d_inode;
/* afs_linux_follow_link
* a file system dependent link following routine.
*/
-struct dentry * afs_linux_follow_link(struct dentry *dp,
- struct dentry *basep,
- unsigned int follow)
+struct dentry *
+afs_linux_follow_link(struct dentry *dp, struct dentry *basep,
+ unsigned int follow)
{
int code = 0;
char *name;
AFS_GLOCK();
- name = osi_Alloc(PATH_MAX+1);
+ name = osi_Alloc(PATH_MAX + 1);
if (!name) {
AFS_GUNLOCK();
dput(basep);
code = afs_linux_ireadlink(dp->d_inode, name, PATH_MAX, AFS_UIOSYS);
AFS_GUNLOCK();
- if (code<0) {
+ if (code < 0) {
dput(basep);
res = ERR_PTR(code);
- }
- else {
+ } else {
name[code] = '\0';
res = lookup_dentry(name, basep, follow);
}
AFS_GLOCK();
- osi_Free(name, PATH_MAX+1);
+ osi_Free(name, PATH_MAX + 1);
AFS_GUNLOCK();
return res;
}
+#endif
/* afs_linux_readpage
* all reads come through here. A strategy-like read call.
*/
-int afs_linux_readpage(struct file *fp, struct page *pp)
+int
+afs_linux_readpage(struct file *fp, struct page *pp)
{
int code;
cred_t *credp = crref();
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+ char *address;
+ afs_offs_t offset = pp->index << PAGE_CACHE_SHIFT;
+#else
ulong address = afs_linux_page_address(pp);
+ afs_offs_t offset = pageoff(pp);
+#endif
uio_t tuio;
struct iovec iovec;
struct inode *ip = FILE_INODE(fp);
int cnt = atomic_read(&pp->count);
+ struct vcache *avc = ITOAFS(ip);
AFS_GLOCK();
- afs_Trace4(afs_iclSetp, CM_TRACE_READPAGE,
- ICL_TYPE_POINTER, ip,
- ICL_TYPE_POINTER, pp,
- ICL_TYPE_INT32, cnt,
- ICL_TYPE_INT32, 99999); /* not a possible code value */
+ afs_Trace4(afs_iclSetp, CM_TRACE_READPAGE, ICL_TYPE_POINTER, ip, ICL_TYPE_POINTER, pp, ICL_TYPE_INT32, cnt, ICL_TYPE_INT32, 99999); /* not a possible code value */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+ address = kmap(pp);
+ ClearPageError(pp);
+
+ lock_kernel();
+#else
atomic_add(1, &pp->count);
- set_bit(PG_locked, &pp->flags); /* other bits? See mm.h */
+ set_bit(PG_locked, &pp->flags); /* other bits? See mm.h */
clear_bit(PG_error, &pp->flags);
+#endif
- setup_uio(&tuio, &iovec, (char*)address, pp->offset, PAGESIZE,
- UIO_READ, AFS_UIOSYS);
- code = afs_rdwr((struct vcache*)ip, &tuio, UIO_READ, 0, credp);
+ setup_uio(&tuio, &iovec, (char *)address, offset, PAGESIZE, UIO_READ,
+ AFS_UIOSYS);
+ code = afs_rdwr(avc, &tuio, UIO_READ, 0, credp);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+ unlock_kernel();
+#endif
if (!code) {
- if (tuio.uio_resid) /* zero remainder of page */
- memset((void*)(address+(PAGESIZE-tuio.uio_resid)), 0,
+ if (tuio.uio_resid) /* zero remainder of page */
+ memset((void *)(address + (PAGESIZE - tuio.uio_resid)), 0,
tuio.uio_resid);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+ flush_dcache_page(pp);
+ SetPageUptodate(pp);
+#else
set_bit(PG_uptodate, &pp->flags);
+#endif
}
-
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+ kunmap(pp);
+ UnlockPage(pp);
+#else
clear_bit(PG_locked, &pp->flags);
wake_up(&pp->wait);
free_page(address);
+#endif
+
+ if (!code && AFS_CHUNKOFFSET(offset) == 0) {
+ struct dcache *tdc;
+ struct vrequest treq;
+
+ code = afs_InitReq(&treq, credp);
+ if (!code && !NBObtainWriteLock(&avc->lock, 534)) {
+ tdc = afs_FindDCache(avc, offset);
+ if (tdc) {
+ if (!(tdc->mflags & DFNextStarted))
+ afs_PrefetchChunk(avc, tdc, credp, &treq);
+ afs_PutDCache(tdc);
+ }
+ ReleaseWriteLock(&avc->lock);
+ }
+ }
crfree(credp);
- afs_Trace4(afs_iclSetp, CM_TRACE_READPAGE,
- ICL_TYPE_POINTER, ip,
- ICL_TYPE_POINTER, pp,
- ICL_TYPE_INT32, cnt,
- ICL_TYPE_INT32, code);
+ afs_Trace4(afs_iclSetp, CM_TRACE_READPAGE, ICL_TYPE_POINTER, ip,
+ ICL_TYPE_POINTER, pp, ICL_TYPE_INT32, cnt, ICL_TYPE_INT32,
+ code);
AFS_GUNLOCK();
return -code;
}
-#ifdef NOTUSED
-/* afs_linux_writepage - is this used anywhere? */
-int afs_linux_writepage(struct inode *ip, struct page *) { return -EINVAL };
+#if defined(AFS_LINUX24_ENV)
+int
+afs_linux_writepage(struct page *pp)
+{
+ struct address_space *mapping = pp->mapping;
+ struct inode *inode;
+ unsigned long end_index;
+ unsigned offset = PAGE_CACHE_SIZE;
+ long status;
+
+ inode = (struct inode *)mapping->host;
+ end_index = inode->i_size >> PAGE_CACHE_SHIFT;
+
+ /* easy case */
+ if (pp->index < end_index)
+ goto do_it;
+ /* things got complicated... */
+ offset = inode->i_size & (PAGE_CACHE_SIZE - 1);
+ /* OK, are we completely out? */
+ if (pp->index >= end_index + 1 || !offset)
+ return -EIO;
+ do_it:
+ AFS_GLOCK();
+ status = afs_linux_writepage_sync(inode, pp, 0, offset);
+ AFS_GUNLOCK();
+ SetPageUptodate(pp);
+ UnlockPage(pp);
+ if (status == offset)
+ return 0;
+ else
+ return status;
+}
+#endif
+#ifdef NOTUSED
/* afs_linux_bmap - supports generic_readpage, but we roll our own. */
-int afs_linux_bmap(struct inode *ip, int) { return -EINVAL; }
+int
+afs_linux_bmap(struct inode *ip, int)
+{
+ return -EINVAL;
+}
/* afs_linux_truncate
* Handles discarding disk blocks if this were a device. ext2 indicates we
* may need to zero partial last pages of memory mapped files.
*/
-void afs_linux_truncate(struct inode *ip)
+void
+afs_linux_truncate(struct inode *ip)
{
}
#endif
/* afs_linux_permission
* Check access rights - returns error if can't check or permission denied.
*/
-int afs_linux_permission(struct inode *ip, int mode)
+int
+afs_linux_permission(struct inode *ip, int mode)
{
int code;
cred_t *credp = crref();
int tmp = 0;
AFS_GLOCK();
- if (mode & MAY_EXEC) tmp |= VEXEC;
- if (mode & MAY_READ) tmp |= VREAD;
- if (mode & MAY_WRITE) tmp |= VWRITE;
- code = afs_access((struct vcache*)ip, tmp, credp);
+ if (mode & MAY_EXEC)
+ tmp |= VEXEC;
+ if (mode & MAY_READ)
+ tmp |= VREAD;
+ if (mode & MAY_WRITE)
+ tmp |= VWRITE;
+ code = afs_access(ITOAFS(ip), tmp, credp);
AFS_GUNLOCK();
crfree(credp);
#ifdef NOTUSED
/* msdos sector mapping hack for memory mapping. */
-int afs_linux_smap(struct inode *ip, int) { return -EINVAL; }
+int
+afs_linux_smap(struct inode *ip, int)
+{
+ return -EINVAL;
+}
#endif
+#if defined(AFS_LINUX24_ENV)
+int
+afs_linux_writepage_sync(struct inode *ip, struct page *pp,
+ unsigned long offset, unsigned int count)
+{
+ struct vcache *vcp = ITOAFS(ip);
+ char *buffer;
+ afs_offs_t base;
+ int code = 0;
+ cred_t *credp;
+ uio_t tuio;
+ struct iovec iovec;
+ int f_flags = 0;
+
+ buffer = kmap(pp) + offset;
+ base = (pp->index << PAGE_CACHE_SHIFT) + offset;
+
+ credp = crref();
+ afs_Trace4(afs_iclSetp, CM_TRACE_UPDATEPAGE, ICL_TYPE_POINTER, vcp,
+ ICL_TYPE_POINTER, pp, ICL_TYPE_INT32, atomic_read(&pp->count),
+ ICL_TYPE_INT32, 99999);
+
+ setup_uio(&tuio, &iovec, buffer, base, count, UIO_WRITE, AFS_UIOSYS);
+
+ code = afs_write(vcp, &tuio, f_flags, credp, 0);
+
+ vcache2inode(vcp);
+
+ if (!code
+ && afs_stats_cmperf.cacheCurrDirtyChunks >
+ afs_stats_cmperf.cacheMaxDirtyChunks) {
+ struct vrequest treq;
+
+ ObtainWriteLock(&vcp->lock, 533);
+ if (!afs_InitReq(&treq, credp))
+ code = afs_DoPartialWrite(vcp, &treq);
+ ReleaseWriteLock(&vcp->lock);
+ }
+ code = code ? -code : count - tuio.uio_resid;
+
+ afs_Trace4(afs_iclSetp, CM_TRACE_UPDATEPAGE, ICL_TYPE_POINTER, vcp,
+ ICL_TYPE_POINTER, pp, ICL_TYPE_INT32, atomic_read(&pp->count),
+ ICL_TYPE_INT32, code);
+
+ crfree(credp);
+ kunmap(pp);
+
+ return code;
+}
+
+static int
+afs_linux_updatepage(struct file *file, struct page *page,
+ unsigned long offset, unsigned int count)
+{
+ struct dentry *dentry = file->f_dentry;
+
+ return afs_linux_writepage_sync(dentry->d_inode, page, offset, count);
+}
+#else
/* afs_linux_updatepage
* What one would have thought was writepage - write dirty page to file.
* Called from generic_file_write. buffer is still in user space. pagep
* has been filled in with old data if we're updating less than a page.
*/
-int afs_linux_updatepage(struct file *fp, struct page *pp,
- unsigned long offset,
- unsigned int count, int sync)
+int
+afs_linux_updatepage(struct file *fp, struct page *pp, unsigned long offset,
+ unsigned int count, int sync)
{
- struct vcache *vcp = (struct vcache *)FILE_INODE(fp);
- u8 *page_addr = (u8*) afs_linux_page_address(pp);
+ struct vcache *vcp = ITOAFS(FILE_INODE(fp));
+ u8 *page_addr = (u8 *) afs_linux_page_address(pp);
int code = 0;
cred_t *credp;
uio_t tuio;
struct iovec iovec;
-
+
set_bit(PG_locked, &pp->flags);
credp = crref();
AFS_GLOCK();
afs_Trace4(afs_iclSetp, CM_TRACE_UPDATEPAGE, ICL_TYPE_POINTER, vcp,
- ICL_TYPE_POINTER, pp,
- ICL_TYPE_INT32, atomic_read(&pp->count),
+ ICL_TYPE_POINTER, pp, ICL_TYPE_INT32, atomic_read(&pp->count),
ICL_TYPE_INT32, 99999);
- setup_uio(&tuio, &iovec, page_addr + offset, pp->offset + offset, count,
- UIO_WRITE, AFS_UIOSYS);
+ setup_uio(&tuio, &iovec, page_addr + offset,
+ (afs_offs_t) (pageoff(pp) + offset), count, UIO_WRITE,
+ AFS_UIOSYS);
code = afs_write(vcp, &tuio, fp->f_flags, credp, 0);
code = code ? -code : count - tuio.uio_resid;
afs_Trace4(afs_iclSetp, CM_TRACE_UPDATEPAGE, ICL_TYPE_POINTER, vcp,
- ICL_TYPE_POINTER, pp,
- ICL_TYPE_INT32, atomic_read(&pp->count),
+ ICL_TYPE_POINTER, pp, ICL_TYPE_INT32, atomic_read(&pp->count),
ICL_TYPE_INT32, code);
AFS_GUNLOCK();
clear_bit(PG_locked, &pp->flags);
return code;
}
+#endif
+
+#if defined(AFS_LINUX24_ENV)
+static int
+afs_linux_commit_write(struct file *file, struct page *page, unsigned offset,
+ unsigned to)
+{
+ int code;
+
+ AFS_GLOCK();
+ lock_kernel();
+ code = afs_linux_updatepage(file, page, offset, to - offset);
+ unlock_kernel();
+ AFS_GUNLOCK();
+ kunmap(page);
+
+ return code;
+}
+
+static int
+afs_linux_prepare_write(struct file *file, struct page *page, unsigned from,
+ unsigned to)
+{
+ kmap(page);
+ return 0;
+}
+extern int afs_notify_change(struct dentry *dp, struct iattr *iattrp);
+#endif
+#if defined(AFS_LINUX24_ENV)
+struct inode_operations afs_file_iops = {
+ revalidate:afs_linux_revalidate,
+ setattr:afs_notify_change,
+ permission:afs_linux_permission,
+};
+struct address_space_operations afs_file_aops = {
+ readpage:afs_linux_readpage,
+ writepage:afs_linux_writepage,
+ commit_write:afs_linux_commit_write,
+ prepare_write:afs_linux_prepare_write,
+};
+struct inode_operations *afs_ops = &afs_file_iops;
+#else
struct inode_operations afs_iops = {
- &afs_file_fops, /* file operations */
- NULL, /* afs_linux_create */
- NULL, /* afs_linux_lookup */
- NULL, /* afs_linux_link */
- NULL, /* afs_linux_unlink */
- NULL, /* afs_linux_symlink */
- NULL, /* afs_linux_mkdir */
- NULL, /* afs_linux_rmdir */
- NULL, /* afs_linux_mknod */
- NULL, /* afs_linux_rename */
- NULL, /* afs_linux_readlink */
- NULL, /* afs_linux_follow_link */
+ &afs_file_fops, /* file operations */
+ NULL, /* afs_linux_create */
+ NULL, /* afs_linux_lookup */
+ NULL, /* afs_linux_link */
+ NULL, /* afs_linux_unlink */
+ NULL, /* afs_linux_symlink */
+ NULL, /* afs_linux_mkdir */
+ NULL, /* afs_linux_rmdir */
+ NULL, /* afs_linux_mknod */
+ NULL, /* afs_linux_rename */
+ NULL, /* afs_linux_readlink */
+ NULL, /* afs_linux_follow_link */
afs_linux_readpage,
- NULL, /* afs_linux_writepage */
- NULL, /* afs_linux_bmap */
- NULL, /* afs_linux_truncate */
+ NULL, /* afs_linux_writepage */
+ NULL, /* afs_linux_bmap */
+ NULL, /* afs_linux_truncate */
afs_linux_permission,
- NULL, /* afs_linux_smap */
+ NULL, /* afs_linux_smap */
afs_linux_updatepage,
afs_linux_revalidate,
};
+struct inode_operations *afs_ops = &afs_iops;
+#endif
+
/* Separate ops vector for directories. Linux 2.2 tests type of inode
* by what sort of operation is allowed.....
*/
+#if defined(AFS_LINUX24_ENV)
struct inode_operations afs_dir_iops = {
- &afs_dir_fops, /* file operations for directories */
+ create:afs_linux_create,
+ lookup:afs_linux_lookup,
+ link:afs_linux_link,
+ unlink:afs_linux_unlink,
+ symlink:afs_linux_symlink,
+ mkdir:afs_linux_mkdir,
+ rmdir:afs_linux_rmdir,
+ rename:afs_linux_rename,
+ revalidate:afs_linux_revalidate,
+ setattr:afs_notify_change,
+ permission:afs_linux_permission,
+};
+#else
+struct inode_operations afs_dir_iops = {
+ &afs_dir_fops, /* file operations for directories */
afs_linux_create,
afs_linux_lookup,
afs_linux_link,
afs_linux_symlink,
afs_linux_mkdir,
afs_linux_rmdir,
- NULL, /* afs_linux_mknod */
+ NULL, /* afs_linux_mknod */
afs_linux_rename,
- NULL, /* afs_linux_readlink */
- NULL, /* afs_linux_follow_link */
- NULL, /* afs_linux_readpage */
- NULL, /* afs_linux_writepage */
- NULL, /* afs_linux_bmap */
- NULL, /* afs_linux_truncate */
+ NULL, /* afs_linux_readlink */
+ NULL, /* afs_linux_follow_link */
+ NULL, /* afs_linux_readpage */
+ NULL, /* afs_linux_writepage */
+ NULL, /* afs_linux_bmap */
+ NULL, /* afs_linux_truncate */
afs_linux_permission,
- NULL, /* afs_linux_smap */
- NULL, /* afs_linux_updatepage */
+ NULL, /* afs_linux_smap */
+ NULL, /* afs_linux_updatepage */
afs_linux_revalidate,
};
-
-struct inode_operations *afs_ops = &afs_iops;
+#endif
/* We really need a separate symlink set of ops, since do_follow_link()
* determines if it _is_ a link by checking if the follow_link op is set.
*/
+#if defined(AFS_LINUX24_ENV)
+static int
+afs_symlink_filler(struct file *file, struct page *page)
+{
+ struct inode *ip = (struct inode *)page->mapping->host;
+ char *p = (char *)kmap(page);
+ int code;
+
+ AFS_GLOCK();
+ lock_kernel();
+ code = afs_linux_ireadlink(ip, p, PAGE_SIZE, AFS_UIOSYS);
+
+ if (code < 0)
+ goto fail;
+ p[code] = '\0'; /* null terminate? */
+ unlock_kernel();
+ AFS_GUNLOCK();
+
+ SetPageUptodate(page);
+ kunmap(page);
+ UnlockPage(page);
+ return 0;
+
+ fail:
+ unlock_kernel();
+ AFS_GUNLOCK();
+
+ SetPageError(page);
+ kunmap(page);
+ UnlockPage(page);
+ return code;
+}
+
+struct address_space_operations afs_symlink_aops = {
+ readpage:afs_symlink_filler
+};
+
struct inode_operations afs_symlink_iops = {
- NULL, /* file operations */
- NULL, /* create */
- NULL, /* lookup */
- NULL, /* link */
- NULL, /* unlink */
- NULL, /* symlink */
- NULL, /* mkdir */
- NULL, /* rmdir */
- NULL, /* afs_linux_mknod */
- NULL, /* rename */
+ readlink:page_readlink,
+ follow_link:page_follow_link,
+ setattr:afs_notify_change,
+};
+#else
+struct inode_operations afs_symlink_iops = {
+ NULL, /* file operations */
+ NULL, /* create */
+ NULL, /* lookup */
+ NULL, /* link */
+ NULL, /* unlink */
+ NULL, /* symlink */
+ NULL, /* mkdir */
+ NULL, /* rmdir */
+ NULL, /* afs_linux_mknod */
+ NULL, /* rename */
afs_linux_readlink,
afs_linux_follow_link,
- NULL, /* readpage */
- NULL, /* afs_linux_writepage */
- NULL, /* afs_linux_bmap */
- NULL, /* afs_linux_truncate */
- afs_linux_permission, /* tho the code appears to indicate not used? */
- NULL, /* afs_linux_smap */
- NULL, /* updatepage */
- afs_linux_revalidate, /* tho the code appears to indicate not used? */
+ NULL, /* readpage */
+ NULL, /* afs_linux_writepage */
+ NULL, /* afs_linux_bmap */
+ NULL, /* afs_linux_truncate */
+ afs_linux_permission, /* tho the code appears to indicate not used? */
+ NULL, /* afs_linux_smap */
+ NULL, /* updatepage */
+ afs_linux_revalidate, /* tho the code appears to indicate not used? */
};
+#endif
git://git.openafs.org / openafs.git / blobdiff