#include "xfs_inum.h"
#include "xfs_sb.h"
#include "xfs_ag.h"
-#include "xfs_dir.h"
#include "xfs_dir2.h"
#include "xfs_trans.h"
#include "xfs_dmapi.h"
#include "xfs_alloc.h"
#include "xfs_btree.h"
#include "xfs_attr_sf.h"
-#include "xfs_dir_sf.h"
#include "xfs_dir2_sf.h"
#include "xfs_dinode.h"
#include "xfs_inode.h"
#include "xfs_error.h"
#include "xfs_rw.h"
#include "xfs_ioctl32.h"
+#include "xfs_vnodeops.h"
#include <linux/dcache.h>
#include <linux/smp_lock.h>
static struct vm_operations_struct xfs_file_vm_ops;
-#ifdef CONFIG_XFS_DMAPI
-static struct vm_operations_struct xfs_dmapi_file_vm_ops;
-#endif
-STATIC inline ssize_t
+STATIC_INLINE ssize_t
__xfs_file_read(
struct kiocb *iocb,
- char __user *buf,
+ const struct iovec *iov,
+ unsigned long nr_segs,
int ioflags,
- size_t count,
loff_t pos)
{
- struct iovec iov = {buf, count};
struct file *file = iocb->ki_filp;
- bhv_vnode_t *vp = vn_from_inode(file->f_dentry->d_inode);
BUG_ON(iocb->ki_pos != pos);
if (unlikely(file->f_flags & O_DIRECT))
ioflags |= IO_ISDIRECT;
- return bhv_vop_read(vp, iocb, &iov, 1, &iocb->ki_pos, ioflags, NULL);
+ return xfs_read(XFS_I(file->f_path.dentry->d_inode), iocb, iov,
+ nr_segs, &iocb->ki_pos, ioflags);
}
STATIC ssize_t
xfs_file_aio_read(
struct kiocb *iocb,
- char __user *buf,
- size_t count,
+ const struct iovec *iov,
+ unsigned long nr_segs,
loff_t pos)
{
- return __xfs_file_read(iocb, buf, IO_ISAIO, count, pos);
+ return __xfs_file_read(iocb, iov, nr_segs, IO_ISAIO, pos);
}
STATIC ssize_t
xfs_file_aio_read_invis(
struct kiocb *iocb,
- char __user *buf,
- size_t count,
+ const struct iovec *iov,
+ unsigned long nr_segs,
loff_t pos)
{
- return __xfs_file_read(iocb, buf, IO_ISAIO|IO_INVIS, count, pos);
+ return __xfs_file_read(iocb, iov, nr_segs, IO_ISAIO|IO_INVIS, pos);
}
-STATIC inline ssize_t
+STATIC_INLINE ssize_t
__xfs_file_write(
- struct kiocb *iocb,
- const char __user *buf,
- int ioflags,
- size_t count,
- loff_t pos)
+ struct kiocb *iocb,
+ const struct iovec *iov,
+ unsigned long nr_segs,
+ int ioflags,
+ loff_t pos)
{
- struct iovec iov = {(void __user *)buf, count};
struct file *file = iocb->ki_filp;
- struct inode *inode = file->f_mapping->host;
- bhv_vnode_t *vp = vn_from_inode(inode);
BUG_ON(iocb->ki_pos != pos);
if (unlikely(file->f_flags & O_DIRECT))
ioflags |= IO_ISDIRECT;
- return bhv_vop_write(vp, iocb, &iov, 1, &iocb->ki_pos, ioflags, NULL);
+ return xfs_write(XFS_I(file->f_mapping->host), iocb, iov, nr_segs,
+ &iocb->ki_pos, ioflags);
}
STATIC ssize_t
xfs_file_aio_write(
struct kiocb *iocb,
- const char __user *buf,
- size_t count,
+ const struct iovec *iov,
+ unsigned long nr_segs,
loff_t pos)
{
- return __xfs_file_write(iocb, buf, IO_ISAIO, count, pos);
+ return __xfs_file_write(iocb, iov, nr_segs, IO_ISAIO, pos);
}
STATIC ssize_t
xfs_file_aio_write_invis(
struct kiocb *iocb,
- const char __user *buf,
- size_t count,
- loff_t pos)
-{
- return __xfs_file_write(iocb, buf, IO_ISAIO|IO_INVIS, count, pos);
-}
-
-STATIC inline ssize_t
-__xfs_file_readv(
- struct file *file,
- const struct iovec *iov,
- int ioflags,
- unsigned long nr_segs,
- loff_t *ppos)
-{
- struct inode *inode = file->f_mapping->host;
- bhv_vnode_t *vp = vn_from_inode(inode);
- struct kiocb kiocb;
- ssize_t rval;
-
- init_sync_kiocb(&kiocb, file);
- kiocb.ki_pos = *ppos;
-
- if (unlikely(file->f_flags & O_DIRECT))
- ioflags |= IO_ISDIRECT;
- rval = bhv_vop_read(vp, &kiocb, iov, nr_segs,
- &kiocb.ki_pos, ioflags, NULL);
-
- *ppos = kiocb.ki_pos;
- return rval;
-}
-
-STATIC ssize_t
-xfs_file_readv(
- struct file *file,
- const struct iovec *iov,
- unsigned long nr_segs,
- loff_t *ppos)
-{
- return __xfs_file_readv(file, iov, 0, nr_segs, ppos);
-}
-
-STATIC ssize_t
-xfs_file_readv_invis(
- struct file *file,
- const struct iovec *iov,
- unsigned long nr_segs,
- loff_t *ppos)
-{
- return __xfs_file_readv(file, iov, IO_INVIS, nr_segs, ppos);
-}
-
-STATIC inline ssize_t
-__xfs_file_writev(
- struct file *file,
- const struct iovec *iov,
- int ioflags,
- unsigned long nr_segs,
- loff_t *ppos)
-{
- struct inode *inode = file->f_mapping->host;
- bhv_vnode_t *vp = vn_from_inode(inode);
- struct kiocb kiocb;
- ssize_t rval;
-
- init_sync_kiocb(&kiocb, file);
- kiocb.ki_pos = *ppos;
- if (unlikely(file->f_flags & O_DIRECT))
- ioflags |= IO_ISDIRECT;
-
- rval = bhv_vop_write(vp, &kiocb, iov, nr_segs,
- &kiocb.ki_pos, ioflags, NULL);
-
- *ppos = kiocb.ki_pos;
- return rval;
-}
-
-STATIC ssize_t
-xfs_file_writev(
- struct file *file,
- const struct iovec *iov,
- unsigned long nr_segs,
- loff_t *ppos)
-{
- return __xfs_file_writev(file, iov, 0, nr_segs, ppos);
-}
-
-STATIC ssize_t
-xfs_file_writev_invis(
- struct file *file,
- const struct iovec *iov,
+ const struct iovec *iov,
unsigned long nr_segs,
- loff_t *ppos)
-{
- return __xfs_file_writev(file, iov, IO_INVIS, nr_segs, ppos);
-}
-
-STATIC ssize_t
-xfs_file_sendfile(
- struct file *filp,
- loff_t *pos,
- size_t count,
- read_actor_t actor,
- void *target)
-{
- return bhv_vop_sendfile(vn_from_inode(filp->f_dentry->d_inode),
- filp, pos, 0, count, actor, target, NULL);
-}
-
-STATIC ssize_t
-xfs_file_sendfile_invis(
- struct file *filp,
- loff_t *pos,
- size_t count,
- read_actor_t actor,
- void *target)
+ loff_t pos)
{
- return bhv_vop_sendfile(vn_from_inode(filp->f_dentry->d_inode),
- filp, pos, IO_INVIS, count, actor, target, NULL);
+ return __xfs_file_write(iocb, iov, nr_segs, IO_ISAIO|IO_INVIS, pos);
}
STATIC ssize_t
size_t len,
unsigned int flags)
{
- return bhv_vop_splice_read(vn_from_inode(infilp->f_dentry->d_inode),
- infilp, ppos, pipe, len, flags, 0, NULL);
+ return xfs_splice_read(XFS_I(infilp->f_path.dentry->d_inode),
+ infilp, ppos, pipe, len, flags, 0);
}
STATIC ssize_t
size_t len,
unsigned int flags)
{
- return bhv_vop_splice_read(vn_from_inode(infilp->f_dentry->d_inode),
- infilp, ppos, pipe, len, flags, IO_INVIS,
- NULL);
+ return xfs_splice_read(XFS_I(infilp->f_path.dentry->d_inode),
+ infilp, ppos, pipe, len, flags, IO_INVIS);
}
STATIC ssize_t
size_t len,
unsigned int flags)
{
- return bhv_vop_splice_write(vn_from_inode(outfilp->f_dentry->d_inode),
- pipe, outfilp, ppos, len, flags, 0, NULL);
+ return xfs_splice_write(XFS_I(outfilp->f_path.dentry->d_inode),
+ pipe, outfilp, ppos, len, flags, 0);
}
STATIC ssize_t
size_t len,
unsigned int flags)
{
- return bhv_vop_splice_write(vn_from_inode(outfilp->f_dentry->d_inode),
- pipe, outfilp, ppos, len, flags, IO_INVIS,
- NULL);
+ return xfs_splice_write(XFS_I(outfilp->f_path.dentry->d_inode),
+ pipe, outfilp, ppos, len, flags, IO_INVIS);
}
STATIC int
{
if (!(filp->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
return -EFBIG;
- return -bhv_vop_open(vn_from_inode(inode), NULL);
-}
-
-STATIC int
-xfs_file_close(
- struct file *filp)
-{
- return -bhv_vop_close(vn_from_inode(filp->f_dentry->d_inode), 0,
- file_count(filp) > 1 ? L_FALSE : L_TRUE, NULL);
+ return -xfs_open(XFS_I(inode));
}
STATIC int
struct inode *inode,
struct file *filp)
{
- bhv_vnode_t *vp = vn_from_inode(inode);
-
- if (vp)
- return -bhv_vop_release(vp);
- return 0;
+ return -xfs_release(XFS_I(inode));
}
+/*
+ * We ignore the datasync flag here because a datasync is effectively
+ * identical to an fsync. That is, datasync implies that we need to write
+ * only the metadata needed to be able to access the data that is written
+ * if we crash after the call completes. Hence if we are writing beyond
+ * EOF we have to log the inode size change as well, which makes it a
+ * full fsync. If we don't write beyond EOF, the inode core will be
+ * clean in memory and so we don't need to log the inode, just like
+ * fsync.
+ */
STATIC int
xfs_file_fsync(
struct file *filp,
struct dentry *dentry,
int datasync)
{
- bhv_vnode_t *vp = vn_from_inode(dentry->d_inode);
- int flags = FSYNC_WAIT;
-
- if (datasync)
- flags |= FSYNC_DATA;
- if (VN_TRUNC(vp))
- VUNTRUNCATE(vp);
- return -bhv_vop_fsync(vp, flags, NULL, (xfs_off_t)0, (xfs_off_t)-1);
+ xfs_iflags_clear(XFS_I(dentry->d_inode), XFS_ITRUNCATED);
+ return -xfs_fsync(XFS_I(dentry->d_inode));
}
-#ifdef CONFIG_XFS_DMAPI
-STATIC struct page *
-xfs_vm_nopage(
- struct vm_area_struct *area,
- unsigned long address,
- int *type)
+/*
+ * Unfortunately we can't just use the clean and simple readdir implementation
+ * below, because nfs might call back into ->lookup from the filldir callback
+ * and that will deadlock the low-level btree code.
+ *
+ * Hopefully we'll find a better workaround that allows to use the optimal
+ * version at least for local readdirs for 2.6.25.
+ */
+#if 0
+STATIC int
+xfs_file_readdir(
+ struct file *filp,
+ void *dirent,
+ filldir_t filldir)
{
- struct inode *inode = area->vm_file->f_dentry->d_inode;
- bhv_vnode_t *vp = vn_from_inode(inode);
+ struct inode *inode = filp->f_path.dentry->d_inode;
+ xfs_inode_t *ip = XFS_I(inode);
+ int error;
+ size_t bufsize;
+
+ /*
+ * The Linux API doesn't pass down the total size of the buffer
+ * we read into down to the filesystem. With the filldir concept
+ * it's not needed for correct information, but the XFS dir2 leaf
+ * code wants an estimate of the buffer size to calculate it's
+ * readahead window and size the buffers used for mapping to
+ * physical blocks.
+ *
+ * Try to give it an estimate that's good enough, maybe at some
+ * point we can change the ->readdir prototype to include the
+ * buffer size.
+ */
+ bufsize = (size_t)min_t(loff_t, PAGE_SIZE, inode->i_size);
- ASSERT_ALWAYS(vp->v_vfsp->vfs_flag & VFS_DMI);
- if (XFS_SEND_MMAP(XFS_VFSTOM(vp->v_vfsp), area, 0))
- return NULL;
- return filemap_nopage(area, address, type);
+ error = xfs_readdir(ip, dirent, bufsize,
+ (xfs_off_t *)&filp->f_pos, filldir);
+ if (error)
+ return -error;
+ return 0;
+}
+#else
+
+struct hack_dirent {
+ u64 ino;
+ loff_t offset;
+ int namlen;
+ unsigned int d_type;
+ char name[];
+};
+
+struct hack_callback {
+ char *dirent;
+ size_t len;
+ size_t used;
+};
+
+STATIC int
+xfs_hack_filldir(
+ void *__buf,
+ const char *name,
+ int namlen,
+ loff_t offset,
+ u64 ino,
+ unsigned int d_type)
+{
+ struct hack_callback *buf = __buf;
+ struct hack_dirent *de = (struct hack_dirent *)(buf->dirent + buf->used);
+ unsigned int reclen;
+
+ reclen = ALIGN(sizeof(struct hack_dirent) + namlen, sizeof(u64));
+ if (buf->used + reclen > buf->len)
+ return -EINVAL;
+
+ de->namlen = namlen;
+ de->offset = offset;
+ de->ino = ino;
+ de->d_type = d_type;
+ memcpy(de->name, name, namlen);
+ buf->used += reclen;
+ return 0;
}
-#endif /* CONFIG_XFS_DMAPI */
STATIC int
xfs_file_readdir(
void *dirent,
filldir_t filldir)
{
- int error = 0;
- bhv_vnode_t *vp = vn_from_inode(filp->f_dentry->d_inode);
- uio_t uio;
- iovec_t iov;
+ struct inode *inode = filp->f_path.dentry->d_inode;
+ xfs_inode_t *ip = XFS_I(inode);
+ struct hack_callback buf;
+ struct hack_dirent *de;
+ int error;
+ loff_t size;
int eof = 0;
- caddr_t read_buf;
- int namelen, size = 0;
- size_t rlen = PAGE_CACHE_SIZE;
- xfs_off_t start_offset, curr_offset;
- xfs_dirent_t *dbp = NULL;
+ xfs_off_t start_offset, curr_offset, offset;
- /* Try fairly hard to get memory */
+ /*
+ * Try fairly hard to get memory
+ */
+ buf.len = PAGE_CACHE_SIZE;
do {
- if ((read_buf = (caddr_t)kmalloc(rlen, GFP_KERNEL)))
+ buf.dirent = kmalloc(buf.len, GFP_KERNEL);
+ if (buf.dirent)
break;
- rlen >>= 1;
- } while (rlen >= 1024);
+ buf.len >>= 1;
+ } while (buf.len >= 1024);
- if (read_buf == NULL)
+ if (!buf.dirent)
return -ENOMEM;
- uio.uio_iov = &iov;
- uio.uio_segflg = UIO_SYSSPACE;
curr_offset = filp->f_pos;
- if (filp->f_pos != 0x7fffffff)
- uio.uio_offset = filp->f_pos;
+ if (curr_offset == 0x7fffffff)
+ offset = 0xffffffff;
else
- uio.uio_offset = 0xffffffff;
+ offset = filp->f_pos;
while (!eof) {
- uio.uio_resid = iov.iov_len = rlen;
- iov.iov_base = read_buf;
- uio.uio_iovcnt = 1;
+ unsigned int reclen;
- start_offset = uio.uio_offset;
+ start_offset = offset;
- error = bhv_vop_readdir(vp, &uio, NULL, &eof);
- if ((uio.uio_offset == start_offset) || error) {
+ buf.used = 0;
+ error = -xfs_readdir(ip, &buf, buf.len, &offset,
+ xfs_hack_filldir);
+ if (error || offset == start_offset) {
size = 0;
break;
}
- size = rlen - uio.uio_resid;
- dbp = (xfs_dirent_t *)read_buf;
+ size = buf.used;
+ de = (struct hack_dirent *)buf.dirent;
while (size > 0) {
- namelen = strlen(dbp->d_name);
-
- if (filldir(dirent, dbp->d_name, namelen,
- (loff_t) curr_offset & 0x7fffffff,
- (ino_t) dbp->d_ino,
- DT_UNKNOWN)) {
+ curr_offset = de->offset /* & 0x7fffffff */;
+ if (filldir(dirent, de->name, de->namlen,
+ curr_offset & 0x7fffffff,
+ de->ino, de->d_type)) {
goto done;
}
- size -= dbp->d_reclen;
- curr_offset = (loff_t)dbp->d_off /* & 0x7fffffff */;
- dbp = (xfs_dirent_t *)((char *)dbp + dbp->d_reclen);
+
+ reclen = ALIGN(sizeof(struct hack_dirent) + de->namlen,
+ sizeof(u64));
+ size -= reclen;
+ de = (struct hack_dirent *)((char *)de + reclen);
}
}
-done:
+
+ done:
if (!error) {
if (size == 0)
- filp->f_pos = uio.uio_offset & 0x7fffffff;
- else if (dbp)
+ filp->f_pos = offset & 0x7fffffff;
+ else if (de)
filp->f_pos = curr_offset;
}
- kfree(read_buf);
- return -error;
+ kfree(buf.dirent);
+ return error;
}
+#endif
STATIC int
xfs_file_mmap(
struct vm_area_struct *vma)
{
vma->vm_ops = &xfs_file_vm_ops;
-
-#ifdef CONFIG_XFS_DMAPI
- if (vn_from_inode(filp->f_dentry->d_inode)->v_vfsp->vfs_flag & VFS_DMI)
- vma->vm_ops = &xfs_dmapi_file_vm_ops;
-#endif /* CONFIG_XFS_DMAPI */
+ vma->vm_flags |= VM_CAN_NONLINEAR;
file_accessed(filp);
return 0;
unsigned long p)
{
int error;
- struct inode *inode = filp->f_dentry->d_inode;
- bhv_vnode_t *vp = vn_from_inode(inode);
+ struct inode *inode = filp->f_path.dentry->d_inode;
- error = bhv_vop_ioctl(vp, inode, filp, 0, cmd, (void __user *)p);
- VMODIFY(vp);
+ error = xfs_ioctl(XFS_I(inode), filp, 0, cmd, (void __user *)p);
+ xfs_iflags_set(XFS_I(inode), XFS_IMODIFIED);
/* NOTE: some of the ioctl's return positive #'s as a
* byte count indicating success, such as
unsigned long p)
{
int error;
- struct inode *inode = filp->f_dentry->d_inode;
- bhv_vnode_t *vp = vn_from_inode(inode);
+ struct inode *inode = filp->f_path.dentry->d_inode;
- error = bhv_vop_ioctl(vp, inode, filp, IO_INVIS, cmd, (void __user *)p);
- VMODIFY(vp);
+ error = xfs_ioctl(XFS_I(inode), filp, IO_INVIS, cmd, (void __user *)p);
+ xfs_iflags_set(XFS_I(inode), XFS_IMODIFIED);
/* NOTE: some of the ioctl's return positive #'s as a
* byte count indicating success, such as
return error;
}
-#ifdef CONFIG_XFS_DMAPI
-#ifdef HAVE_VMOP_MPROTECT
-STATIC int
-xfs_vm_mprotect(
- struct vm_area_struct *vma,
- unsigned int newflags)
-{
- bhv_vnode_t *vp = vn_from_inode(vma->vm_file->f_dentry->d_inode);
- int error = 0;
-
- if (vp->v_vfsp->vfs_flag & VFS_DMI) {
- if ((vma->vm_flags & VM_MAYSHARE) &&
- (newflags & VM_WRITE) && !(vma->vm_flags & VM_WRITE)) {
- xfs_mount_t *mp = XFS_VFSTOM(vp->v_vfsp);
-
- error = XFS_SEND_MMAP(mp, vma, VM_WRITE);
- }
- }
- return error;
-}
-#endif /* HAVE_VMOP_MPROTECT */
-#endif /* CONFIG_XFS_DMAPI */
-
-#ifdef HAVE_FOP_OPEN_EXEC
-/* If the user is attempting to execute a file that is offline then
- * we have to trigger a DMAPI READ event before the file is marked as busy
- * otherwise the invisible I/O will not be able to write to the file to bring
- * it back online.
+/*
+ * mmap()d file has taken write protection fault and is being made
+ * writable. We can set the page state up correctly for a writable
+ * page, which means we can do correct delalloc accounting (ENOSPC
+ * checking!) and unwritten extent mapping.
*/
STATIC int
-xfs_file_open_exec(
- struct inode *inode)
+xfs_vm_page_mkwrite(
+ struct vm_area_struct *vma,
+ struct page *page)
{
- bhv_vnode_t *vp = vn_from_inode(inode);
- xfs_mount_t *mp = XFS_VFSTOM(vp->v_vfsp);
- int error = 0;
- xfs_inode_t *ip;
-
- if (vp->v_vfsp->vfs_flag & VFS_DMI) {
- ip = xfs_vtoi(vp);
- if (!ip) {
- error = -EINVAL;
- goto open_exec_out;
- }
- if (DM_EVENT_ENABLED(vp->v_vfsp, ip, DM_EVENT_READ)) {
- error = -XFS_SEND_DATA(mp, DM_EVENT_READ, vp,
- 0, 0, 0, NULL);
- }
- }
-open_exec_out:
- return error;
+ return block_page_mkwrite(vma, page, xfs_get_blocks);
}
-#endif /* HAVE_FOP_OPEN_EXEC */
const struct file_operations xfs_file_operations = {
.llseek = generic_file_llseek,
.read = do_sync_read,
.write = do_sync_write,
- .readv = xfs_file_readv,
- .writev = xfs_file_writev,
.aio_read = xfs_file_aio_read,
.aio_write = xfs_file_aio_write,
- .sendfile = xfs_file_sendfile,
.splice_read = xfs_file_splice_read,
.splice_write = xfs_file_splice_write,
.unlocked_ioctl = xfs_file_ioctl,
#endif
.mmap = xfs_file_mmap,
.open = xfs_file_open,
- .flush = xfs_file_close,
.release = xfs_file_release,
.fsync = xfs_file_fsync,
#ifdef HAVE_FOP_OPEN_EXEC
.llseek = generic_file_llseek,
.read = do_sync_read,
.write = do_sync_write,
- .readv = xfs_file_readv_invis,
- .writev = xfs_file_writev_invis,
.aio_read = xfs_file_aio_read_invis,
.aio_write = xfs_file_aio_write_invis,
- .sendfile = xfs_file_sendfile_invis,
.splice_read = xfs_file_splice_read_invis,
.splice_write = xfs_file_splice_write_invis,
.unlocked_ioctl = xfs_file_ioctl_invis,
#endif
.mmap = xfs_file_mmap,
.open = xfs_file_open,
- .flush = xfs_file_close,
.release = xfs_file_release,
.fsync = xfs_file_fsync,
};
};
static struct vm_operations_struct xfs_file_vm_ops = {
- .nopage = filemap_nopage,
- .populate = filemap_populate,
-};
-
-#ifdef CONFIG_XFS_DMAPI
-static struct vm_operations_struct xfs_dmapi_file_vm_ops = {
- .nopage = xfs_vm_nopage,
- .populate = filemap_populate,
-#ifdef HAVE_VMOP_MPROTECT
- .mprotect = xfs_vm_mprotect,
-#endif
+ .fault = filemap_fault,
+ .page_mkwrite = xfs_vm_page_mkwrite,
};
-#endif /* CONFIG_XFS_DMAPI */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff