#include <linux/mm_inline.h>
#endif
#include <linux/pagemap.h>
-#include <linux/smp_lock.h>
#include <linux/writeback.h>
#include <linux/pagevec.h>
#include "afs/lock.h"
return afs_convert_code(code);
}
+#ifdef HAVE_LINUX_GENERIC_FILE_AIO_READ
+static ssize_t
+afs_linux_aio_read(struct kiocb *iocb, const struct iovec *iov, unsigned long segs, loff_t pos)
+{
+ struct file *fp = iocb->ki_filp;
+ ssize_t code = 0;
+ struct vcache *vcp = VTOAFS(fp->f_dentry->d_inode);
+
+ AFS_GLOCK();
+ afs_Trace4(afs_iclSetp, CM_TRACE_AIOREADOP, ICL_TYPE_POINTER, vcp,
+ ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(pos), ICL_TYPE_INT32, segs, ICL_TYPE_INT32,
+ 99999);
+ code = afs_linux_VerifyVCache(vcp, NULL);
+
+ if (code == 0) {
+ /* Linux's FlushPages implementation doesn't ever use credp,
+ * so we optimise by not using it */
+ osi_FlushPages(vcp, NULL); /* ensure stale pages are gone */
+ AFS_GUNLOCK();
+ code = generic_file_aio_read(iocb, iov, segs, pos);
+ AFS_GLOCK();
+ }
+
+ afs_Trace4(afs_iclSetp, CM_TRACE_AIOREADOP, ICL_TYPE_POINTER, vcp,
+ ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(pos), ICL_TYPE_INT32, segs, ICL_TYPE_INT32,
+ code);
+ AFS_GUNLOCK();
+ return code;
+}
+#else
static ssize_t
afs_linux_read(struct file *fp, char *buf, size_t count, loff_t * offp)
{
AFS_GUNLOCK();
return code;
}
+#endif
-/* Now we have integrated VM for writes as well as reads. generic_file_write
- * also takes care of re-positioning the pointer if file is open in append
+/* Now we have integrated VM for writes as well as reads. the generic write operations
+ * also take 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.
*/
+#ifdef HAVE_LINUX_GENERIC_FILE_AIO_READ
+static ssize_t
+afs_linux_aio_write(struct kiocb *iocb, const struct iovec *iov, unsigned long segs, loff_t pos)
+{
+ ssize_t code = 0;
+ struct vcache *vcp = VTOAFS(iocb->ki_filp->f_dentry->d_inode);
+ cred_t *credp;
+
+ AFS_GLOCK();
+
+ afs_Trace4(afs_iclSetp, CM_TRACE_AIOWRITEOP, ICL_TYPE_POINTER, vcp,
+ ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(pos), ICL_TYPE_INT32, segs, ICL_TYPE_INT32,
+ (iocb->ki_filp->f_flags & O_APPEND) ? 99998 : 99999);
+
+ code = afs_linux_VerifyVCache(vcp, &credp);
+
+ ObtainWriteLock(&vcp->lock, 529);
+ afs_FakeOpen(vcp);
+ ReleaseWriteLock(&vcp->lock);
+ if (code == 0) {
+ AFS_GUNLOCK();
+ code = generic_file_aio_write(iocb, iov, segs, pos);
+ AFS_GLOCK();
+ }
+
+ ObtainWriteLock(&vcp->lock, 530);
+
+ if (vcp->execsOrWriters == 1 && !credp)
+ credp = crref();
+
+ afs_FakeClose(vcp, credp);
+ ReleaseWriteLock(&vcp->lock);
+
+ afs_Trace4(afs_iclSetp, CM_TRACE_AIOWRITEOP, ICL_TYPE_POINTER, vcp,
+ ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(pos), ICL_TYPE_INT32, segs, ICL_TYPE_INT32,
+ code);
+
+ if (credp)
+ crfree(credp);
+ AFS_GUNLOCK();
+ return code;
+}
+#else
static ssize_t
afs_linux_write(struct file *fp, const char *buf, size_t count, loff_t * offp)
{
AFS_GUNLOCK();
return code;
}
+#endif
extern int BlobScan(struct dcache * afile, afs_int32 ablob);
int offset;
int dirpos;
struct DirEntry *de;
+ struct DirBuffer entry;
ino_t ino;
int len;
afs_size_t origOffset, tlen;
code = -ENOENT;
goto out;
}
- ObtainSharedLock(&avc->lock, 810);
- UpgradeSToWLock(&avc->lock, 811);
+ ObtainWriteLock(&avc->lock, 811);
ObtainReadLock(&tdc->lock);
/*
* Make sure that the data in the cache is current. There are two
&& (tdc->dflags & DFFetching)
&& hsame(avc->f.m.DataVersion, tdc->f.versionNo)) {
ReleaseReadLock(&tdc->lock);
- ReleaseSharedLock(&avc->lock);
+ ReleaseWriteLock(&avc->lock);
afs_osi_Sleep(&tdc->validPos);
- ObtainSharedLock(&avc->lock, 812);
+ ObtainWriteLock(&avc->lock, 812);
ObtainReadLock(&tdc->lock);
}
if (!(avc->f.states & CStatd)
|| !hsame(avc->f.m.DataVersion, tdc->f.versionNo)) {
ReleaseReadLock(&tdc->lock);
- ReleaseSharedLock(&avc->lock);
+ ReleaseWriteLock(&avc->lock);
afs_PutDCache(tdc);
goto tagain;
}
if (!dirpos)
break;
- de = afs_dir_GetBlob(tdc, dirpos);
- if (!de)
- break;
-
- ino = afs_calc_inum (avc->f.fid.Fid.Volume, ntohl(de->fid.vnode));
-
- if (de->name)
- len = strlen(de->name);
- else {
- printf("afs_linux_readdir: afs_dir_GetBlob failed, null name (inode %lx, dirpos %d)\n",
- (unsigned long)&tdc->f.inode, dirpos);
- DRelease(de, 0);
+ code = afs_dir_GetVerifiedBlob(tdc, dirpos, &entry);
+ if (code) {
+ afs_warn("Corrupt directory (inode %lx, dirpos %d)",
+ (unsigned long)&tdc->f.inode, dirpos);
ReleaseSharedLock(&avc->lock);
afs_PutDCache(tdc);
code = -ENOENT;
goto out;
- }
+ }
+
+ de = (struct DirEntry *)entry.data;
+ ino = afs_calc_inum (avc->f.fid.Cell, avc->f.fid.Fid.Volume,
+ ntohl(de->fid.vnode));
+ len = strlen(de->name);
/* filldir returns -EINVAL when the buffer is full. */
{
code = (*filldir) (dirbuf, de->name, len, offset, ino, type);
AFS_GLOCK();
}
- DRelease(de, 0);
+ DRelease(&entry, 0);
if (code)
break;
offset = dirpos + 1 + ((len + 16) >> 5);
};
struct file_operations afs_file_fops = {
+#ifdef HAVE_LINUX_GENERIC_FILE_AIO_READ
+ .aio_read = afs_linux_aio_read,
+ .aio_write = afs_linux_aio_write,
+#else
.read = afs_linux_read,
.write = afs_linux_write,
-#ifdef HAVE_LINUX_GENERIC_FILE_AIO_READ
- .aio_read = generic_file_aio_read,
- .aio_write = generic_file_aio_write,
#endif
#ifdef HAVE_UNLOCKED_IOCTL
.unlocked_ioctl = afs_unlocked_xioctl,
struct afs_fakestat_state fakestate;
int locked = 0;
+#ifdef LOOKUP_RCU
+ /* We don't support RCU path walking */
+ if (nd->flags & LOOKUP_RCU)
+ return -ECHILD;
+#endif
+
afs_InitFakeStat(&fakestate);
if (dp->d_inode) {
rehash = newdp;
}
+#if defined(D_COUNT_INT)
+ spin_lock(&olddp->d_lock);
+ if (olddp->d_count > 1) {
+ spin_unlock(&olddp->d_lock);
+ shrink_dcache_parent(olddp);
+ } else
+ spin_unlock(&olddp->d_lock);
+#else
if (atomic_read(&olddp->d_count) > 1)
shrink_dcache_parent(olddp);
+#endif
AFS_GLOCK();
code = afs_rename(VTOAFS(oldip), (char *)oldname, VTOAFS(newip), (char *)newname, credp);
{
int code;
cred_t *credp = crref();
- uio_t tuio;
+ struct uio tuio;
struct iovec iov;
setup_uio(&tuio, &iov, target, (afs_offs_t) 0, maxlen, UIO_READ, seg);
int code;
char *name;
- name = osi_Alloc(PATH_MAX);
+ name = kmalloc(PATH_MAX, GFP_NOFS);
if (!name) {
return -EIO;
}
afs_linux_put_link(struct dentry *dentry, struct nameidata *nd)
{
char *name = nd_get_link(nd);
- if (name && !IS_ERR(name)) {
- osi_Free(name, PATH_MAX);
- }
+
+ if (name && !IS_ERR(name))
+ kfree(name);
}
#endif /* USABLE_KERNEL_PAGE_SYMLINK_CACHE */
int chunk, struct pagevec *lrupv,
struct afs_pagecopy_task *task) {
loff_t offset = page_offset(page);
+ struct inode *cacheinode = cachefp->f_dentry->d_inode;
struct page *newpage, *cachepage;
struct address_space *cachemapping;
int pageindex;
int code = 0;
- cachemapping = cachefp->f_dentry->d_inode->i_mapping;
+ cachemapping = cacheinode->i_mapping;
newpage = NULL;
cachepage = NULL;
+ /* If we're trying to read a page that's past the end of the disk
+ * cache file, then just return a zeroed page */
+ if (AFS_CHUNKOFFSET(offset) >= i_size_read(cacheinode)) {
+ zero_user_segment(page, 0, PAGE_CACHE_SIZE);
+ SetPageUptodate(page);
+ if (task)
+ unlock_page(page);
+ return 0;
+ }
+
/* From our offset, we now need to work out which page in the disk
* file it corresponds to. This will be fun ... */
pageindex = (offset - AFS_CHUNKTOBASE(chunk)) >> PAGE_CACHE_SHIFT;
{
afs_int32 code;
char *address;
- uio_t *auio;
+ struct uio *auio;
struct iovec *iovecp;
struct inode *ip = FILE_INODE(fp);
afs_int32 cnt = page_count(pp);
address = kmap(pp);
ClearPageError(pp);
- auio = osi_Alloc(sizeof(uio_t));
- iovecp = osi_Alloc(sizeof(struct iovec));
+ auio = kmalloc(sizeof(struct uio), GFP_NOFS);
+ iovecp = kmalloc(sizeof(struct iovec), GFP_NOFS);
setup_uio(auio, iovecp, (char *)address, offset, PAGE_SIZE, UIO_READ,
AFS_UIOSYS);
kunmap(pp);
- osi_Free(auio, sizeof(uio_t));
- osi_Free(iovecp, sizeof(struct iovec));
+ kfree(auio);
+ kfree(iovecp);
crfree(credp);
return afs_convert_code(code);
struct list_head *page_list, unsigned num_pages)
{
afs_int32 page_ix;
- uio_t *auio;
+ struct uio *auio;
afs_offs_t offset;
struct iovec* iovecp;
struct nocache_read_request *ancr;
/* background thread must free: iovecp, auio, ancr */
iovecp = osi_Alloc(num_pages * sizeof(struct iovec));
- auio = osi_Alloc(sizeof(uio_t));
+ auio = osi_Alloc(sizeof(struct uio));
auio->uio_iov = iovecp;
auio->uio_iovcnt = num_pages;
auio->uio_flag = UIO_READ;
/* If there is nothing for the background thread to handle,
* it won't be freeing the things that we never gave it */
osi_Free(iovecp, num_pages * sizeof(struct iovec));
- osi_Free(auio, sizeof(uio_t));
+ osi_Free(auio, sizeof(struct uio));
osi_Free(ancr, sizeof(struct nocache_read_request));
}
/* we do not flush, release, or unmap pages--that will be
afs_linux_bypass_readpage(struct file *fp, struct page *pp)
{
cred_t *credp = NULL;
- uio_t *auio;
+ struct uio *auio;
struct iovec *iovecp;
struct nocache_read_request *ancr;
int code;
ClearPageError(pp);
/* receiver frees */
- auio = osi_Alloc(sizeof(uio_t));
+ auio = osi_Alloc(sizeof(struct uio));
iovecp = osi_Alloc(sizeof(struct iovec));
/* address can be NULL, because we overwrite it with 'pp', below */
char *buffer;
afs_offs_t base;
int code = 0;
- uio_t tuio;
+ struct uio tuio;
struct iovec iovec;
int f_flags = 0;
* Check access rights - returns error if can't check or permission denied.
*/
static int
-#ifdef IOP_PERMISSION_TAKES_NAMEIDATA
+#if defined(IOP_PERMISSION_TAKES_FLAGS)
+afs_linux_permission(struct inode *ip, int mode, unsigned int flags)
+#elif defined(IOP_PERMISSION_TAKES_NAMEIDATA)
afs_linux_permission(struct inode *ip, int mode, struct nameidata *nd)
#else
afs_linux_permission(struct inode *ip, int mode)
#endif
{
int code;
- cred_t *credp = crref();
+ cred_t *credp;
int tmp = 0;
+#if defined(IOP_PERMISSION_TAKES_FLAGS)
+ /* We don't support RCU path walking */
+ if (flags & IPERM_FLAG_RCU)
+ return -ECHILD;
+#endif
+
+ credp = crref();
AFS_GLOCK();
if (mode & MAY_EXEC)
tmp |= VEXEC;
git://git.openafs.org / openafs.git / blobdiff