2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
25 #include "xfs_trans.h"
26 #include "xfs_dmapi.h"
27 #include "xfs_mount.h"
28 #include "xfs_bmap_btree.h"
29 #include "xfs_alloc_btree.h"
30 #include "xfs_ialloc_btree.h"
31 #include "xfs_alloc.h"
32 #include "xfs_btree.h"
33 #include "xfs_attr_sf.h"
34 #include "xfs_dir2_sf.h"
35 #include "xfs_dinode.h"
36 #include "xfs_inode.h"
37 #include "xfs_error.h"
39 #include "xfs_ioctl32.h"
40 #include "xfs_vnodeops.h"
42 #include <linux/dcache.h>
43 #include <linux/smp_lock.h>
45 static struct vm_operations_struct xfs_file_vm_ops;
50 const struct iovec *iov,
51 unsigned long nr_segs,
55 struct file *file = iocb->ki_filp;
57 BUG_ON(iocb->ki_pos != pos);
58 if (unlikely(file->f_flags & O_DIRECT))
59 ioflags |= IO_ISDIRECT;
60 return xfs_read(XFS_I(file->f_path.dentry->d_inode), iocb, iov,
61 nr_segs, &iocb->ki_pos, ioflags);
67 const struct iovec *iov,
68 unsigned long nr_segs,
71 return __xfs_file_read(iocb, iov, nr_segs, IO_ISAIO, pos);
75 xfs_file_aio_read_invis(
77 const struct iovec *iov,
78 unsigned long nr_segs,
81 return __xfs_file_read(iocb, iov, nr_segs, IO_ISAIO|IO_INVIS, pos);
87 const struct iovec *iov,
88 unsigned long nr_segs,
92 struct file *file = iocb->ki_filp;
94 BUG_ON(iocb->ki_pos != pos);
95 if (unlikely(file->f_flags & O_DIRECT))
96 ioflags |= IO_ISDIRECT;
97 return xfs_write(XFS_I(file->f_mapping->host), iocb, iov, nr_segs,
98 &iocb->ki_pos, ioflags);
104 const struct iovec *iov,
105 unsigned long nr_segs,
108 return __xfs_file_write(iocb, iov, nr_segs, IO_ISAIO, pos);
112 xfs_file_aio_write_invis(
114 const struct iovec *iov,
115 unsigned long nr_segs,
118 return __xfs_file_write(iocb, iov, nr_segs, IO_ISAIO|IO_INVIS, pos);
122 xfs_file_splice_read(
125 struct pipe_inode_info *pipe,
129 return xfs_splice_read(XFS_I(infilp->f_path.dentry->d_inode),
130 infilp, ppos, pipe, len, flags, 0);
134 xfs_file_splice_read_invis(
137 struct pipe_inode_info *pipe,
141 return xfs_splice_read(XFS_I(infilp->f_path.dentry->d_inode),
142 infilp, ppos, pipe, len, flags, IO_INVIS);
146 xfs_file_splice_write(
147 struct pipe_inode_info *pipe,
148 struct file *outfilp,
153 return xfs_splice_write(XFS_I(outfilp->f_path.dentry->d_inode),
154 pipe, outfilp, ppos, len, flags, 0);
158 xfs_file_splice_write_invis(
159 struct pipe_inode_info *pipe,
160 struct file *outfilp,
165 return xfs_splice_write(XFS_I(outfilp->f_path.dentry->d_inode),
166 pipe, outfilp, ppos, len, flags, IO_INVIS);
174 if (!(filp->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
176 return -xfs_open(XFS_I(inode));
184 return -xfs_release(XFS_I(inode));
190 struct dentry *dentry,
193 int flags = FSYNC_WAIT;
197 xfs_iflags_clear(XFS_I(dentry->d_inode), XFS_ITRUNCATED);
198 return -xfs_fsync(XFS_I(dentry->d_inode), flags,
199 (xfs_off_t)0, (xfs_off_t)-1);
203 * Unfortunately we can't just use the clean and simple readdir implementation
204 * below, because nfs might call back into ->lookup from the filldir callback
205 * and that will deadlock the low-level btree code.
207 * Hopefully we'll find a better workaround that allows to use the optimal
208 * version at least for local readdirs for 2.6.25.
217 struct inode *inode = filp->f_path.dentry->d_inode;
218 xfs_inode_t *ip = XFS_I(inode);
223 * The Linux API doesn't pass down the total size of the buffer
224 * we read into down to the filesystem. With the filldir concept
225 * it's not needed for correct information, but the XFS dir2 leaf
226 * code wants an estimate of the buffer size to calculate it's
227 * readahead window and size the buffers used for mapping to
230 * Try to give it an estimate that's good enough, maybe at some
231 * point we can change the ->readdir prototype to include the
234 bufsize = (size_t)min_t(loff_t, PAGE_SIZE, inode->i_size);
236 error = xfs_readdir(ip, dirent, bufsize,
237 (xfs_off_t *)&filp->f_pos, filldir);
252 struct hack_callback {
267 struct hack_callback *buf = __buf;
268 struct hack_dirent *de = (struct hack_dirent *)(buf->dirent + buf->used);
271 reclen = ALIGN(sizeof(struct hack_dirent) + namlen, sizeof(u64));
272 if (buf->used + reclen > buf->len)
279 memcpy(de->name, name, namlen);
290 struct inode *inode = filp->f_path.dentry->d_inode;
291 xfs_inode_t *ip = XFS_I(inode);
292 struct hack_callback buf;
293 struct hack_dirent *de;
297 xfs_off_t start_offset, curr_offset, offset;
300 * Try fairly hard to get memory
302 buf.len = PAGE_CACHE_SIZE;
304 buf.dirent = kmalloc(buf.len, GFP_KERNEL);
308 } while (buf.len >= 1024);
313 curr_offset = filp->f_pos;
314 if (curr_offset == 0x7fffffff)
317 offset = filp->f_pos;
322 start_offset = offset;
325 error = -xfs_readdir(ip, &buf, buf.len, &offset,
327 if (error || offset == start_offset) {
333 de = (struct hack_dirent *)buf.dirent;
335 curr_offset = de->offset /* & 0x7fffffff */;
336 if (filldir(dirent, de->name, de->namlen,
337 curr_offset & 0x7fffffff,
338 de->ino, de->d_type)) {
342 reclen = ALIGN(sizeof(struct hack_dirent) + de->namlen,
345 de = (struct hack_dirent *)((char *)de + reclen);
352 filp->f_pos = offset & 0x7fffffff;
354 filp->f_pos = curr_offset;
365 struct vm_area_struct *vma)
367 vma->vm_ops = &xfs_file_vm_ops;
368 vma->vm_flags |= VM_CAN_NONLINEAR;
381 struct inode *inode = filp->f_path.dentry->d_inode;
383 error = xfs_ioctl(XFS_I(inode), filp, 0, cmd, (void __user *)p);
384 xfs_iflags_set(XFS_I(inode), XFS_IMODIFIED);
386 /* NOTE: some of the ioctl's return positive #'s as a
387 * byte count indicating success, such as
388 * readlink_by_handle. So we don't "sign flip"
389 * like most other routines. This means true
390 * errors need to be returned as a negative value.
396 xfs_file_ioctl_invis(
402 struct inode *inode = filp->f_path.dentry->d_inode;
404 error = xfs_ioctl(XFS_I(inode), filp, IO_INVIS, cmd, (void __user *)p);
405 xfs_iflags_set(XFS_I(inode), XFS_IMODIFIED);
407 /* NOTE: some of the ioctl's return positive #'s as a
408 * byte count indicating success, such as
409 * readlink_by_handle. So we don't "sign flip"
410 * like most other routines. This means true
411 * errors need to be returned as a negative value.
417 * mmap()d file has taken write protection fault and is being made
418 * writable. We can set the page state up correctly for a writable
419 * page, which means we can do correct delalloc accounting (ENOSPC
420 * checking!) and unwritten extent mapping.
424 struct vm_area_struct *vma,
427 return block_page_mkwrite(vma, page, xfs_get_blocks);
430 const struct file_operations xfs_file_operations = {
431 .llseek = generic_file_llseek,
432 .read = do_sync_read,
433 .write = do_sync_write,
434 .aio_read = xfs_file_aio_read,
435 .aio_write = xfs_file_aio_write,
436 .splice_read = xfs_file_splice_read,
437 .splice_write = xfs_file_splice_write,
438 .unlocked_ioctl = xfs_file_ioctl,
440 .compat_ioctl = xfs_file_compat_ioctl,
442 .mmap = xfs_file_mmap,
443 .open = xfs_file_open,
444 .release = xfs_file_release,
445 .fsync = xfs_file_fsync,
446 #ifdef HAVE_FOP_OPEN_EXEC
447 .open_exec = xfs_file_open_exec,
451 const struct file_operations xfs_invis_file_operations = {
452 .llseek = generic_file_llseek,
453 .read = do_sync_read,
454 .write = do_sync_write,
455 .aio_read = xfs_file_aio_read_invis,
456 .aio_write = xfs_file_aio_write_invis,
457 .splice_read = xfs_file_splice_read_invis,
458 .splice_write = xfs_file_splice_write_invis,
459 .unlocked_ioctl = xfs_file_ioctl_invis,
461 .compat_ioctl = xfs_file_compat_invis_ioctl,
463 .mmap = xfs_file_mmap,
464 .open = xfs_file_open,
465 .release = xfs_file_release,
466 .fsync = xfs_file_fsync,
470 const struct file_operations xfs_dir_file_operations = {
471 .read = generic_read_dir,
472 .readdir = xfs_file_readdir,
473 .unlocked_ioctl = xfs_file_ioctl,
475 .compat_ioctl = xfs_file_compat_ioctl,
477 .fsync = xfs_file_fsync,
480 static struct vm_operations_struct xfs_file_vm_ops = {
481 .fault = filemap_fault,
482 .page_mkwrite = xfs_vm_page_mkwrite,