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authorLinus Torvalds <torvalds@linux-foundation.org>2017-03-02 18:20:00 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2017-03-02 18:20:00 -0500
commit94e877d0fb43bec0540d6a37d49cb4f7f05a5348 (patch)
treedc301912dff9c390cba59df00cb76b62ac862d6a
parent69fd110eb650ea7baa82158f3b89a7d86da1d056 (diff)
parent653a7746fa2f5369985f5368ffc162b6510db6c8 (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs pile two from Al Viro: - orangefs fix - series of fs/namei.c cleanups from me - VFS stuff coming from overlayfs tree * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: orangefs: Use RCU for destroy_inode vfs: use helper for calling f_op->fsync() mm: use helper for calling f_op->mmap() vfs: use helpers for calling f_op->{read,write}_iter() vfs: pass type instead of fn to do_{loop,iter}_readv_writev() vfs: extract common parts of {compat_,}do_readv_writev() vfs: wrap write f_ops with file_{start,end}_write() vfs: deny copy_file_range() for non regular files vfs: deny fallocate() on directory vfs: create vfs helper vfs_tmpfile() namei.c: split unlazy_walk() namei.c: fold the check for DCACHE_OP_REVALIDATE into d_revalidate() lookup_fast(): clean up the logics around the fallback to non-rcu mode namei: fold unlazy_link() into its sole caller
Diffstat
-rw-r--r--drivers/block/loop.c4
-rw-r--r--drivers/gpu/drm/i915/i915_gem_dmabuf.c2
-rw-r--r--drivers/gpu/drm/vgem/vgem_drv.c2
-rw-r--r--fs/aio.c4
-rw-r--r--fs/coda/file.c2
-rw-r--r--fs/namei.c251
-rw-r--r--fs/open.c14
-rw-r--r--fs/orangefs/super.c9
-rw-r--r--fs/read_write.c130
-rw-r--r--fs/splice.c2
-rw-r--r--fs/sync.c2
-rw-r--r--include/linux/fs.h52
-rw-r--r--ipc/shm.c4
-rw-r--r--mm/mmap.c2
-rw-r--r--mm/nommu.c4
15 files changed, 261 insertions, 223 deletions
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 4b52a1690329..eeb1db73f44e 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -501,9 +501,9 @@ static int lo_rw_aio(struct loop_device *lo, struct loop_cmd *cmd,
501 cmd->iocb.ki_flags = IOCB_DIRECT; 501 cmd->iocb.ki_flags = IOCB_DIRECT;
502 502
503 if (rw == WRITE) 503 if (rw == WRITE)
504 ret = file->f_op->write_iter(&cmd->iocb, &iter); 504 ret = call_write_iter(file, &cmd->iocb, &iter);
505 else 505 else
506 ret = file->f_op->read_iter(&cmd->iocb, &iter); 506 ret = call_read_iter(file, &cmd->iocb, &iter);
507 507
508 if (ret != -EIOCBQUEUED) 508 if (ret != -EIOCBQUEUED)
509 cmd->iocb.ki_complete(&cmd->iocb, ret, 0); 509 cmd->iocb.ki_complete(&cmd->iocb, ret, 0);
diff --git a/drivers/gpu/drm/i915/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/i915_gem_dmabuf.c
index d037adcda6f2..29bb8011dbc4 100644
--- a/drivers/gpu/drm/i915/i915_gem_dmabuf.c
+++ b/drivers/gpu/drm/i915/i915_gem_dmabuf.c
@@ -141,7 +141,7 @@ static int i915_gem_dmabuf_mmap(struct dma_buf *dma_buf, struct vm_area_struct *
141 if (!obj->base.filp) 141 if (!obj->base.filp)
142 return -ENODEV; 142 return -ENODEV;
143 143
144 ret = obj->base.filp->f_op->mmap(obj->base.filp, vma); 144 ret = call_mmap(obj->base.filp, vma);
145 if (ret) 145 if (ret)
146 return ret; 146 return ret;
147 147
diff --git a/drivers/gpu/drm/vgem/vgem_drv.c b/drivers/gpu/drm/vgem/vgem_drv.c
index 7ccbb03e98de..a1f42d125e6e 100644
--- a/drivers/gpu/drm/vgem/vgem_drv.c
+++ b/drivers/gpu/drm/vgem/vgem_drv.c
@@ -288,7 +288,7 @@ static int vgem_prime_mmap(struct drm_gem_object *obj,
288 if (!obj->filp) 288 if (!obj->filp)
289 return -ENODEV; 289 return -ENODEV;
290 290
291 ret = obj->filp->f_op->mmap(obj->filp, vma); 291 ret = call_mmap(obj->filp, vma);
292 if (ret) 292 if (ret)
293 return ret; 293 return ret;
294 294
diff --git a/fs/aio.c b/fs/aio.c
index 7e2ab9c8e39c..7ec41aee7098 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -1495,7 +1495,7 @@ static ssize_t aio_read(struct kiocb *req, struct iocb *iocb, bool vectored,
1495 return ret; 1495 return ret;
1496 ret = rw_verify_area(READ, file, &req->ki_pos, iov_iter_count(&iter)); 1496 ret = rw_verify_area(READ, file, &req->ki_pos, iov_iter_count(&iter));
1497 if (!ret) 1497 if (!ret)
1498 ret = aio_ret(req, file->f_op->read_iter(req, &iter)); 1498 ret = aio_ret(req, call_read_iter(file, req, &iter));
1499 kfree(iovec); 1499 kfree(iovec);
1500 return ret; 1500 return ret;
1501} 1501}
@@ -1520,7 +1520,7 @@ static ssize_t aio_write(struct kiocb *req, struct iocb *iocb, bool vectored,
1520 if (!ret) { 1520 if (!ret) {
1521 req->ki_flags |= IOCB_WRITE; 1521 req->ki_flags |= IOCB_WRITE;
1522 file_start_write(file); 1522 file_start_write(file);
1523 ret = aio_ret(req, file->f_op->write_iter(req, &iter)); 1523 ret = aio_ret(req, call_write_iter(file, req, &iter));
1524 /* 1524 /*
1525 * We release freeze protection in aio_complete(). Fool lockdep 1525 * We release freeze protection in aio_complete(). Fool lockdep
1526 * by telling it the lock got released so that it doesn't 1526 * by telling it the lock got released so that it doesn't
diff --git a/fs/coda/file.c b/fs/coda/file.c
index 6e0154eb6fcc..9d956cd6d46f 100644
--- a/fs/coda/file.c
+++ b/fs/coda/file.c
@@ -96,7 +96,7 @@ coda_file_mmap(struct file *coda_file, struct vm_area_struct *vma)
96 cfi->cfi_mapcount++; 96 cfi->cfi_mapcount++;
97 spin_unlock(&cii->c_lock); 97 spin_unlock(&cii->c_lock);
98 98
99 return host_file->f_op->mmap(host_file, vma); 99 return call_mmap(host_file, vma);
100} 100}
101 101
102int coda_open(struct inode *coda_inode, struct file *coda_file) 102int coda_open(struct inode *coda_inode, struct file *coda_file)
diff --git a/fs/namei.c b/fs/namei.c
index da689c9c005e..d41fab78798b 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -672,17 +672,15 @@ static bool legitimize_links(struct nameidata *nd)
672/** 672/**
673 * unlazy_walk - try to switch to ref-walk mode. 673 * unlazy_walk - try to switch to ref-walk mode.
674 * @nd: nameidata pathwalk data 674 * @nd: nameidata pathwalk data
675 * @dentry: child of nd->path.dentry or NULL
676 * @seq: seq number to check dentry against
677 * Returns: 0 on success, -ECHILD on failure 675 * Returns: 0 on success, -ECHILD on failure
678 * 676 *
679 * unlazy_walk attempts to legitimize the current nd->path, nd->root and dentry 677 * unlazy_walk attempts to legitimize the current nd->path and nd->root
680 * for ref-walk mode. @dentry must be a path found by a do_lookup call on 678 * for ref-walk mode.
681 * @nd or NULL. Must be called from rcu-walk context. 679 * Must be called from rcu-walk context.
682 * Nothing should touch nameidata between unlazy_walk() failure and 680 * Nothing should touch nameidata between unlazy_walk() failure and
683 * terminate_walk(). 681 * terminate_walk().
684 */ 682 */
685static int unlazy_walk(struct nameidata *nd, struct dentry *dentry, unsigned seq) 683static int unlazy_walk(struct nameidata *nd)
686{ 684{
687 struct dentry *parent = nd->path.dentry; 685 struct dentry *parent = nd->path.dentry;
688 686
@@ -691,33 +689,66 @@ static int unlazy_walk(struct nameidata *nd, struct dentry *dentry, unsigned seq
691 nd->flags &= ~LOOKUP_RCU; 689 nd->flags &= ~LOOKUP_RCU;
692 if (unlikely(!legitimize_links(nd))) 690 if (unlikely(!legitimize_links(nd)))
693 goto out2; 691 goto out2;
692 if (unlikely(!legitimize_path(nd, &nd->path, nd->seq)))
693 goto out1;
694 if (nd->root.mnt && !(nd->flags & LOOKUP_ROOT)) {
695 if (unlikely(!legitimize_path(nd, &nd->root, nd->root_seq)))
696 goto out;
697 }
698 rcu_read_unlock();
699 BUG_ON(nd->inode != parent->d_inode);
700 return 0;
701
702out2:
703 nd->path.mnt = NULL;
704 nd->path.dentry = NULL;
705out1:
706 if (!(nd->flags & LOOKUP_ROOT))
707 nd->root.mnt = NULL;
708out:
709 rcu_read_unlock();
710 return -ECHILD;
711}
712
713/**
714 * unlazy_child - try to switch to ref-walk mode.
715 * @nd: nameidata pathwalk data
716 * @dentry: child of nd->path.dentry
717 * @seq: seq number to check dentry against
718 * Returns: 0 on success, -ECHILD on failure
719 *
720 * unlazy_child attempts to legitimize the current nd->path, nd->root and dentry
721 * for ref-walk mode. @dentry must be a path found by a do_lookup call on
722 * @nd. Must be called from rcu-walk context.
723 * Nothing should touch nameidata between unlazy_child() failure and
724 * terminate_walk().
725 */
726static int unlazy_child(struct nameidata *nd, struct dentry *dentry, unsigned seq)
727{
728 BUG_ON(!(nd->flags & LOOKUP_RCU));
729
730 nd->flags &= ~LOOKUP_RCU;
731 if (unlikely(!legitimize_links(nd)))
732 goto out2;
694 if (unlikely(!legitimize_mnt(nd->path.mnt, nd->m_seq))) 733 if (unlikely(!legitimize_mnt(nd->path.mnt, nd->m_seq)))
695 goto out2; 734 goto out2;
696 if (unlikely(!lockref_get_not_dead(&parent->d_lockref))) 735 if (unlikely(!lockref_get_not_dead(&nd->path.dentry->d_lockref)))
697 goto out1; 736 goto out1;
698 737
699 /* 738 /*
700 * For a negative lookup, the lookup sequence point is the parents 739 * We need to move both the parent and the dentry from the RCU domain
701 * sequence point, and it only needs to revalidate the parent dentry. 740 * to be properly refcounted. And the sequence number in the dentry
702 * 741 * validates *both* dentry counters, since we checked the sequence
703 * For a positive lookup, we need to move both the parent and the 742 * number of the parent after we got the child sequence number. So we
704 * dentry from the RCU domain to be properly refcounted. And the 743 * know the parent must still be valid if the child sequence number is
705 * sequence number in the dentry validates *both* dentry counters,
706 * since we checked the sequence number of the parent after we got
707 * the child sequence number. So we know the parent must still
708 * be valid if the child sequence number is still valid.
709 */ 744 */
710 if (!dentry) { 745 if (unlikely(!lockref_get_not_dead(&dentry->d_lockref)))
711 if (read_seqcount_retry(&parent->d_seq, nd->seq)) 746 goto out;
712 goto out; 747 if (unlikely(read_seqcount_retry(&dentry->d_seq, seq))) {
713 BUG_ON(nd->inode != parent->d_inode); 748 rcu_read_unlock();
714 } else { 749 dput(dentry);
715 if (!lockref_get_not_dead(&dentry->d_lockref)) 750 goto drop_root_mnt;
716 goto out;
717 if (read_seqcount_retry(&dentry->d_seq, seq))
718 goto drop_dentry;
719 } 751 }
720
721 /* 752 /*
722 * Sequence counts matched. Now make sure that the root is 753 * Sequence counts matched. Now make sure that the root is
723 * still valid and get it if required. 754 * still valid and get it if required.
@@ -733,10 +764,6 @@ static int unlazy_walk(struct nameidata *nd, struct dentry *dentry, unsigned seq
733 rcu_read_unlock(); 764 rcu_read_unlock();
734 return 0; 765 return 0;
735 766
736drop_dentry:
737 rcu_read_unlock();
738 dput(dentry);
739 goto drop_root_mnt;
740out2: 767out2:
741 nd->path.mnt = NULL; 768 nd->path.mnt = NULL;
742out1: 769out1:
@@ -749,27 +776,12 @@ drop_root_mnt:
749 return -ECHILD; 776 return -ECHILD;
750} 777}
751 778
752static int unlazy_link(struct nameidata *nd, struct path *link, unsigned seq)
753{
754 if (unlikely(!legitimize_path(nd, link, seq))) {
755 drop_links(nd);
756 nd->depth = 0;
757 nd->flags &= ~LOOKUP_RCU;
758 nd->path.mnt = NULL;
759 nd->path.dentry = NULL;
760 if (!(nd->flags & LOOKUP_ROOT))
761 nd->root.mnt = NULL;
762 rcu_read_unlock();
763 } else if (likely(unlazy_walk(nd, NULL, 0)) == 0) {
764 return 0;
765 }
766 path_put(link);
767 return -ECHILD;
768}
769
770static inline int d_revalidate(struct dentry *dentry, unsigned int flags) 779static inline int d_revalidate(struct dentry *dentry, unsigned int flags)
771{ 780{
772 return dentry->d_op->d_revalidate(dentry, flags); 781 if (unlikely(dentry->d_flags & DCACHE_OP_REVALIDATE))
782 return dentry->d_op->d_revalidate(dentry, flags);
783 else
784 return 1;
773} 785}
774 786
775/** 787/**
@@ -790,7 +802,7 @@ static int complete_walk(struct nameidata *nd)
790 if (nd->flags & LOOKUP_RCU) { 802 if (nd->flags & LOOKUP_RCU) {
791 if (!(nd->flags & LOOKUP_ROOT)) 803 if (!(nd->flags & LOOKUP_ROOT))
792 nd->root.mnt = NULL; 804 nd->root.mnt = NULL;
793 if (unlikely(unlazy_walk(nd, NULL, 0))) 805 if (unlikely(unlazy_walk(nd)))
794 return -ECHILD; 806 return -ECHILD;
795 } 807 }
796 808
@@ -1016,7 +1028,7 @@ const char *get_link(struct nameidata *nd)
1016 touch_atime(&last->link); 1028 touch_atime(&last->link);
1017 cond_resched(); 1029 cond_resched();
1018 } else if (atime_needs_update_rcu(&last->link, inode)) { 1030 } else if (atime_needs_update_rcu(&last->link, inode)) {
1019 if (unlikely(unlazy_walk(nd, NULL, 0))) 1031 if (unlikely(unlazy_walk(nd)))
1020 return ERR_PTR(-ECHILD); 1032 return ERR_PTR(-ECHILD);
1021 touch_atime(&last->link); 1033 touch_atime(&last->link);
1022 } 1034 }
@@ -1035,7 +1047,7 @@ const char *get_link(struct nameidata *nd)
1035 if (nd->flags & LOOKUP_RCU) { 1047 if (nd->flags & LOOKUP_RCU) {
1036 res = get(NULL, inode, &last->done); 1048 res = get(NULL, inode, &last->done);
1037 if (res == ERR_PTR(-ECHILD)) { 1049 if (res == ERR_PTR(-ECHILD)) {
1038 if (unlikely(unlazy_walk(nd, NULL, 0))) 1050 if (unlikely(unlazy_walk(nd)))
1039 return ERR_PTR(-ECHILD); 1051 return ERR_PTR(-ECHILD);
1040 res = get(dentry, inode, &last->done); 1052 res = get(dentry, inode, &last->done);
1041 } 1053 }
@@ -1469,19 +1481,14 @@ static struct dentry *lookup_dcache(const struct qstr *name,
1469 struct dentry *dir, 1481 struct dentry *dir,
1470 unsigned int flags) 1482 unsigned int flags)
1471{ 1483{
1472 struct dentry *dentry; 1484 struct dentry *dentry = d_lookup(dir, name);
1473 int error;
1474
1475 dentry = d_lookup(dir, name);
1476 if (dentry) { 1485 if (dentry) {
1477 if (dentry->d_flags & DCACHE_OP_REVALIDATE) { 1486 int error = d_revalidate(dentry, flags);
1478 error = d_revalidate(dentry, flags); 1487 if (unlikely(error <= 0)) {
1479 if (unlikely(error <= 0)) { 1488 if (!error)
1480 if (!error) 1489 d_invalidate(dentry);
1481 d_invalidate(dentry); 1490 dput(dentry);
1482 dput(dentry); 1491 return ERR_PTR(error);
1483 return ERR_PTR(error);
1484 }
1485 } 1492 }
1486 } 1493 }
1487 return dentry; 1494 return dentry;
@@ -1546,7 +1553,7 @@ static int lookup_fast(struct nameidata *nd,
1546 bool negative; 1553 bool negative;
1547 dentry = __d_lookup_rcu(parent, &nd->last, &seq); 1554 dentry = __d_lookup_rcu(parent, &nd->last, &seq);
1548 if (unlikely(!dentry)) { 1555 if (unlikely(!dentry)) {
1549 if (unlazy_walk(nd, NULL, 0)) 1556 if (unlazy_walk(nd))
1550 return -ECHILD; 1557 return -ECHILD;
1551 return 0; 1558 return 0;
1552 } 1559 }
@@ -1571,14 +1578,8 @@ static int lookup_fast(struct nameidata *nd,
1571 return -ECHILD; 1578 return -ECHILD;
1572 1579
1573 *seqp = seq; 1580 *seqp = seq;
1574 if (unlikely(dentry->d_flags & DCACHE_OP_REVALIDATE)) 1581 status = d_revalidate(dentry, nd->flags);
1575 status = d_revalidate(dentry, nd->flags); 1582 if (likely(status > 0)) {
1576 if (unlikely(status <= 0)) {
1577 if (unlazy_walk(nd, dentry, seq))
1578 return -ECHILD;
1579 if (status == -ECHILD)
1580 status = d_revalidate(dentry, nd->flags);
1581 } else {
1582 /* 1583 /*
1583 * Note: do negative dentry check after revalidation in 1584 * Note: do negative dentry check after revalidation in
1584 * case that drops it. 1585 * case that drops it.
@@ -1589,15 +1590,17 @@ static int lookup_fast(struct nameidata *nd,
1589 path->dentry = dentry; 1590 path->dentry = dentry;
1590 if (likely(__follow_mount_rcu(nd, path, inode, seqp))) 1591 if (likely(__follow_mount_rcu(nd, path, inode, seqp)))
1591 return 1; 1592 return 1;
1592 if (unlazy_walk(nd, dentry, seq))
1593 return -ECHILD;
1594 } 1593 }
1594 if (unlazy_child(nd, dentry, seq))
1595 return -ECHILD;
1596 if (unlikely(status == -ECHILD))
1597 /* we'd been told to redo it in non-rcu mode */
1598 status = d_revalidate(dentry, nd->flags);
1595 } else { 1599 } else {
1596 dentry = __d_lookup(parent, &nd->last); 1600 dentry = __d_lookup(parent, &nd->last);
1597 if (unlikely(!dentry)) 1601 if (unlikely(!dentry))
1598 return 0; 1602 return 0;
1599 if (unlikely(dentry->d_flags & DCACHE_OP_REVALIDATE)) 1603 status = d_revalidate(dentry, nd->flags);
1600 status = d_revalidate(dentry, nd->flags);
1601 } 1604 }
1602 if (unlikely(status <= 0)) { 1605 if (unlikely(status <= 0)) {
1603 if (!status) 1606 if (!status)
@@ -1636,8 +1639,7 @@ again:
1636 if (IS_ERR(dentry)) 1639 if (IS_ERR(dentry))
1637 goto out; 1640 goto out;
1638 if (unlikely(!d_in_lookup(dentry))) { 1641 if (unlikely(!d_in_lookup(dentry))) {
1639 if ((dentry->d_flags & DCACHE_OP_REVALIDATE) && 1642 if (!(flags & LOOKUP_NO_REVAL)) {
1640 !(flags & LOOKUP_NO_REVAL)) {
1641 int error = d_revalidate(dentry, flags); 1643 int error = d_revalidate(dentry, flags);
1642 if (unlikely(error <= 0)) { 1644 if (unlikely(error <= 0)) {
1643 if (!error) { 1645 if (!error) {
@@ -1668,7 +1670,7 @@ static inline int may_lookup(struct nameidata *nd)
1668 int err = inode_permission(nd->inode, MAY_EXEC|MAY_NOT_BLOCK); 1670 int err = inode_permission(nd->inode, MAY_EXEC|MAY_NOT_BLOCK);
1669 if (err != -ECHILD) 1671 if (err != -ECHILD)
1670 return err; 1672 return err;
1671 if (unlazy_walk(nd, NULL, 0)) 1673 if (unlazy_walk(nd))
1672 return -ECHILD; 1674 return -ECHILD;
1673 } 1675 }
1674 return inode_permission(nd->inode, MAY_EXEC); 1676 return inode_permission(nd->inode, MAY_EXEC);
@@ -1703,9 +1705,17 @@ static int pick_link(struct nameidata *nd, struct path *link,
1703 error = nd_alloc_stack(nd); 1705 error = nd_alloc_stack(nd);
1704 if (unlikely(error)) { 1706 if (unlikely(error)) {
1705 if (error == -ECHILD) { 1707 if (error == -ECHILD) {
1706 if (unlikely(unlazy_link(nd, link, seq))) 1708 if (unlikely(!legitimize_path(nd, link, seq))) {
1707 return -ECHILD; 1709 drop_links(nd);
1708 error = nd_alloc_stack(nd); 1710 nd->depth = 0;
1711 nd->flags &= ~LOOKUP_RCU;
1712 nd->path.mnt = NULL;
1713 nd->path.dentry = NULL;
1714 if (!(nd->flags & LOOKUP_ROOT))
1715 nd->root.mnt = NULL;
1716 rcu_read_unlock();
1717 } else if (likely(unlazy_walk(nd)) == 0)
1718 error = nd_alloc_stack(nd);
1709 } 1719 }
1710 if (error) { 1720 if (error) {
1711 path_put(link); 1721 path_put(link);
@@ -2122,7 +2132,7 @@ OK:
2122 } 2132 }
2123 if (unlikely(!d_can_lookup(nd->path.dentry))) { 2133 if (unlikely(!d_can_lookup(nd->path.dentry))) {
2124 if (nd->flags & LOOKUP_RCU) { 2134 if (nd->flags & LOOKUP_RCU) {
2125 if (unlazy_walk(nd, NULL, 0)) 2135 if (unlazy_walk(nd))
2126 return -ECHILD; 2136 return -ECHILD;
2127 } 2137 }
2128 return -ENOTDIR; 2138 return -ENOTDIR;
@@ -2579,7 +2589,7 @@ mountpoint_last(struct nameidata *nd)
2579 2589
2580 /* If we're in rcuwalk, drop out of it to handle last component */ 2590 /* If we're in rcuwalk, drop out of it to handle last component */
2581 if (nd->flags & LOOKUP_RCU) { 2591 if (nd->flags & LOOKUP_RCU) {
2582 if (unlazy_walk(nd, NULL, 0)) 2592 if (unlazy_walk(nd))
2583 return -ECHILD; 2593 return -ECHILD;
2584 } 2594 }
2585 2595
@@ -3072,9 +3082,6 @@ static int lookup_open(struct nameidata *nd, struct path *path,
3072 if (d_in_lookup(dentry)) 3082 if (d_in_lookup(dentry))
3073 break; 3083 break;
3074 3084
3075 if (!(dentry->d_flags & DCACHE_OP_REVALIDATE))
3076 break;
3077
3078 error = d_revalidate(dentry, nd->flags); 3085 error = d_revalidate(dentry, nd->flags);
3079 if (likely(error > 0)) 3086 if (likely(error > 0))
3080 break; 3087 break;
@@ -3356,13 +3363,50 @@ out:
3356 return error; 3363 return error;
3357} 3364}
3358 3365
3366struct dentry *vfs_tmpfile(struct dentry *dentry, umode_t mode, int open_flag)
3367{
3368 static const struct qstr name = QSTR_INIT("/", 1);
3369 struct dentry *child = NULL;
3370 struct inode *dir = dentry->d_inode;
3371 struct inode *inode;
3372 int error;
3373
3374 /* we want directory to be writable */
3375 error = inode_permission(dir, MAY_WRITE | MAY_EXEC);
3376 if (error)
3377 goto out_err;
3378 error = -EOPNOTSUPP;
3379 if (!dir->i_op->tmpfile)
3380 goto out_err;
3381 error = -ENOMEM;
3382 child = d_alloc(dentry, &name);
3383 if (unlikely(!child))
3384 goto out_err;
3385 error = dir->i_op->tmpfile(dir, child, mode);
3386 if (error)
3387 goto out_err;
3388 error = -ENOENT;
3389 inode = child->d_inode;
3390 if (unlikely(!inode))
3391 goto out_err;
3392 if (!(open_flag & O_EXCL)) {
3393 spin_lock(&inode->i_lock);
3394 inode->i_state |= I_LINKABLE;
3395 spin_unlock(&inode->i_lock);
3396 }
3397 return child;
3398
3399out_err:
3400 dput(child);
3401 return ERR_PTR(error);
3402}
3403EXPORT_SYMBOL(vfs_tmpfile);
3404
3359static int do_tmpfile(struct nameidata *nd, unsigned flags, 3405static int do_tmpfile(struct nameidata *nd, unsigned flags,
3360 const struct open_flags *op, 3406 const struct open_flags *op,
3361 struct file *file, int *opened) 3407 struct file *file, int *opened)
3362{ 3408{
3363 static const struct qstr name = QSTR_INIT("/", 1);
3364 struct dentry *child; 3409 struct dentry *child;
3365 struct inode *dir;
3366 struct path path; 3410 struct path path;
3367 int error = path_lookupat(nd, flags | LOOKUP_DIRECTORY, &path); 3411 int error = path_lookupat(nd, flags | LOOKUP_DIRECTORY, &path);
3368 if (unlikely(error)) 3412 if (unlikely(error))
@@ -3370,25 +3414,12 @@ static int do_tmpfile(struct nameidata *nd, unsigned flags,
3370 error = mnt_want_write(path.mnt); 3414 error = mnt_want_write(path.mnt);
3371 if (unlikely(error)) 3415 if (unlikely(error))
3372 goto out; 3416 goto out;
3373 dir = path.dentry->d_inode; 3417 child = vfs_tmpfile(path.dentry, op->mode, op->open_flag);
3374 /* we want directory to be writable */ 3418 error = PTR_ERR(child);
3375 error = inode_permission(dir, MAY_WRITE | MAY_EXEC); 3419 if (unlikely(IS_ERR(child)))
3376 if (error)
3377 goto out2; 3420 goto out2;
3378 if (!dir->i_op->tmpfile) {
3379 error = -EOPNOTSUPP;
3380 goto out2;
3381 }
3382 child = d_alloc(path.dentry, &name);
3383 if (unlikely(!child)) {
3384 error = -ENOMEM;
3385 goto out2;
3386 }
3387 dput(path.dentry); 3421 dput(path.dentry);
3388 path.dentry = child; 3422 path.dentry = child;
3389 error = dir->i_op->tmpfile(dir, child, op->mode);
3390 if (error)
3391 goto out2;
3392 audit_inode(nd->name, child, 0); 3423 audit_inode(nd->name, child, 0);
3393 /* Don't check for other permissions, the inode was just created */ 3424 /* Don't check for other permissions, the inode was just created */
3394 error = may_open(&path, 0, op->open_flag); 3425 error = may_open(&path, 0, op->open_flag);
@@ -3399,14 +3430,8 @@ static int do_tmpfile(struct nameidata *nd, unsigned flags,
3399 if (error) 3430 if (error)
3400 goto out2; 3431 goto out2;
3401 error = open_check_o_direct(file); 3432 error = open_check_o_direct(file);
3402 if (error) { 3433 if (error)
3403 fput(file); 3434 fput(file);
3404 } else if (!(op->open_flag & O_EXCL)) {
3405 struct inode *inode = file_inode(file);
3406 spin_lock(&inode->i_lock);
3407 inode->i_state |= I_LINKABLE;
3408 spin_unlock(&inode->i_lock);
3409 }
3410out2: 3435out2:
3411 mnt_drop_write(path.mnt); 3436 mnt_drop_write(path.mnt);
3412out: 3437out:
diff --git a/fs/open.c b/fs/open.c
index 9921f70bc5ca..949cef29c3bb 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -301,12 +301,10 @@ int vfs_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
301 if (S_ISFIFO(inode->i_mode)) 301 if (S_ISFIFO(inode->i_mode))
302 return -ESPIPE; 302 return -ESPIPE;
303 303
304 /* 304 if (S_ISDIR(inode->i_mode))
305 * Let individual file system decide if it supports preallocation 305 return -EISDIR;
306 * for directories or not. 306
307 */ 307 if (!S_ISREG(inode->i_mode) && !S_ISBLK(inode->i_mode))
308 if (!S_ISREG(inode->i_mode) && !S_ISDIR(inode->i_mode) &&
309 !S_ISBLK(inode->i_mode))
310 return -ENODEV; 308 return -ENODEV;
311 309
312 /* Check for wrap through zero too */ 310 /* Check for wrap through zero too */
@@ -316,7 +314,7 @@ int vfs_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
316 if (!file->f_op->fallocate) 314 if (!file->f_op->fallocate)
317 return -EOPNOTSUPP; 315 return -EOPNOTSUPP;
318 316
319 sb_start_write(inode->i_sb); 317 file_start_write(file);
320 ret = file->f_op->fallocate(file, mode, offset, len); 318 ret = file->f_op->fallocate(file, mode, offset, len);
321 319
322 /* 320 /*
@@ -329,7 +327,7 @@ int vfs_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
329 if (ret == 0) 327 if (ret == 0)
330 fsnotify_modify(file); 328 fsnotify_modify(file);
331 329
332 sb_end_write(inode->i_sb); 330 file_end_write(file);
333 return ret; 331 return ret;
334} 332}
335EXPORT_SYMBOL_GPL(vfs_fallocate); 333EXPORT_SYMBOL_GPL(vfs_fallocate);
diff --git a/fs/orangefs/super.c b/fs/orangefs/super.c
index c48859f16e7b..67c24351a67f 100644
--- a/fs/orangefs/super.c
+++ b/fs/orangefs/super.c
@@ -115,6 +115,13 @@ static struct inode *orangefs_alloc_inode(struct super_block *sb)
115 return &orangefs_inode->vfs_inode; 115 return &orangefs_inode->vfs_inode;
116} 116}
117 117
118static void orangefs_i_callback(struct rcu_head *head)
119{
120 struct inode *inode = container_of(head, struct inode, i_rcu);
121 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
122 kmem_cache_free(orangefs_inode_cache, orangefs_inode);
123}
124
118static void orangefs_destroy_inode(struct inode *inode) 125static void orangefs_destroy_inode(struct inode *inode)
119{ 126{
120 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); 127 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
@@ -123,7 +130,7 @@ static void orangefs_destroy_inode(struct inode *inode)
123 "%s: deallocated %p destroying inode %pU\n", 130 "%s: deallocated %p destroying inode %pU\n",
124 __func__, orangefs_inode, get_khandle_from_ino(inode)); 131 __func__, orangefs_inode, get_khandle_from_ino(inode));
125 132
126 kmem_cache_free(orangefs_inode_cache, orangefs_inode); 133 call_rcu(&inode->i_rcu, orangefs_i_callback);
127} 134}
128 135
129/* 136/*
diff --git a/fs/read_write.c b/fs/read_write.c
index 5816d4c4cab0..f2ed9fdc98fd 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -23,9 +23,6 @@
23#include <linux/uaccess.h> 23#include <linux/uaccess.h>
24#include <asm/unistd.h> 24#include <asm/unistd.h>
25 25
26typedef ssize_t (*io_fn_t)(struct file *, char __user *, size_t, loff_t *);
27typedef ssize_t (*iter_fn_t)(struct kiocb *, struct iov_iter *);
28
29const struct file_operations generic_ro_fops = { 26const struct file_operations generic_ro_fops = {
30 .llseek = generic_file_llseek, 27 .llseek = generic_file_llseek,
31 .read_iter = generic_file_read_iter, 28 .read_iter = generic_file_read_iter,
@@ -370,7 +367,7 @@ ssize_t vfs_iter_read(struct file *file, struct iov_iter *iter, loff_t *ppos)
370 kiocb.ki_pos = *ppos; 367 kiocb.ki_pos = *ppos;
371 368
372 iter->type |= READ; 369 iter->type |= READ;
373 ret = file->f_op->read_iter(&kiocb, iter); 370 ret = call_read_iter(file, &kiocb, iter);
374 BUG_ON(ret == -EIOCBQUEUED); 371 BUG_ON(ret == -EIOCBQUEUED);
375 if (ret > 0) 372 if (ret > 0)
376 *ppos = kiocb.ki_pos; 373 *ppos = kiocb.ki_pos;
@@ -390,7 +387,7 @@ ssize_t vfs_iter_write(struct file *file, struct iov_iter *iter, loff_t *ppos)
390 kiocb.ki_pos = *ppos; 387 kiocb.ki_pos = *ppos;
391 388
392 iter->type |= WRITE; 389 iter->type |= WRITE;
393 ret = file->f_op->write_iter(&kiocb, iter); 390 ret = call_write_iter(file, &kiocb, iter);
394 BUG_ON(ret == -EIOCBQUEUED); 391 BUG_ON(ret == -EIOCBQUEUED);
395 if (ret > 0) 392 if (ret > 0)
396 *ppos = kiocb.ki_pos; 393 *ppos = kiocb.ki_pos;
@@ -439,7 +436,7 @@ static ssize_t new_sync_read(struct file *filp, char __user *buf, size_t len, lo
439 kiocb.ki_pos = *ppos; 436 kiocb.ki_pos = *ppos;
440 iov_iter_init(&iter, READ, &iov, 1, len); 437 iov_iter_init(&iter, READ, &iov, 1, len);
441 438
442 ret = filp->f_op->read_iter(&kiocb, &iter); 439 ret = call_read_iter(filp, &kiocb, &iter);
443 BUG_ON(ret == -EIOCBQUEUED); 440 BUG_ON(ret == -EIOCBQUEUED);
444 *ppos = kiocb.ki_pos; 441 *ppos = kiocb.ki_pos;
445 return ret; 442 return ret;
@@ -496,7 +493,7 @@ static ssize_t new_sync_write(struct file *filp, const char __user *buf, size_t
496 kiocb.ki_pos = *ppos; 493 kiocb.ki_pos = *ppos;
497 iov_iter_init(&iter, WRITE, &iov, 1, len); 494 iov_iter_init(&iter, WRITE, &iov, 1, len);
498 495
499 ret = filp->f_op->write_iter(&kiocb, &iter); 496 ret = call_write_iter(filp, &kiocb, &iter);
500 BUG_ON(ret == -EIOCBQUEUED); 497 BUG_ON(ret == -EIOCBQUEUED);
501 if (ret > 0) 498 if (ret > 0)
502 *ppos = kiocb.ki_pos; 499 *ppos = kiocb.ki_pos;
@@ -675,7 +672,7 @@ unsigned long iov_shorten(struct iovec *iov, unsigned long nr_segs, size_t to)
675EXPORT_SYMBOL(iov_shorten); 672EXPORT_SYMBOL(iov_shorten);
676 673
677static ssize_t do_iter_readv_writev(struct file *filp, struct iov_iter *iter, 674static ssize_t do_iter_readv_writev(struct file *filp, struct iov_iter *iter,
678 loff_t *ppos, iter_fn_t fn, int flags) 675 loff_t *ppos, int type, int flags)
679{ 676{
680 struct kiocb kiocb; 677 struct kiocb kiocb;
681 ssize_t ret; 678 ssize_t ret;
@@ -692,7 +689,10 @@ static ssize_t do_iter_readv_writev(struct file *filp, struct iov_iter *iter,
692 kiocb.ki_flags |= (IOCB_DSYNC | IOCB_SYNC); 689 kiocb.ki_flags |= (IOCB_DSYNC | IOCB_SYNC);
693 kiocb.ki_pos = *ppos; 690 kiocb.ki_pos = *ppos;
694 691
695 ret = fn(&kiocb, iter); 692 if (type == READ)
693 ret = call_read_iter(filp, &kiocb, iter);
694 else
695 ret = call_write_iter(filp, &kiocb, iter);
696 BUG_ON(ret == -EIOCBQUEUED); 696 BUG_ON(ret == -EIOCBQUEUED);
697 *ppos = kiocb.ki_pos; 697 *ppos = kiocb.ki_pos;
698 return ret; 698 return ret;
@@ -700,7 +700,7 @@ static ssize_t do_iter_readv_writev(struct file *filp, struct iov_iter *iter,
700 700
701/* Do it by hand, with file-ops */ 701/* Do it by hand, with file-ops */
702static ssize_t do_loop_readv_writev(struct file *filp, struct iov_iter *iter, 702static ssize_t do_loop_readv_writev(struct file *filp, struct iov_iter *iter,
703 loff_t *ppos, io_fn_t fn, int flags) 703 loff_t *ppos, int type, int flags)
704{ 704{
705 ssize_t ret = 0; 705 ssize_t ret = 0;
706 706
@@ -711,7 +711,13 @@ static ssize_t do_loop_readv_writev(struct file *filp, struct iov_iter *iter,
711 struct iovec iovec = iov_iter_iovec(iter); 711 struct iovec iovec = iov_iter_iovec(iter);
712 ssize_t nr; 712 ssize_t nr;
713 713
714 nr = fn(filp, iovec.iov_base, iovec.iov_len, ppos); 714 if (type == READ) {
715 nr = filp->f_op->read(filp, iovec.iov_base,
716 iovec.iov_len, ppos);
717 } else {
718 nr = filp->f_op->write(filp, iovec.iov_base,
719 iovec.iov_len, ppos);
720 }
715 721
716 if (nr < 0) { 722 if (nr < 0) {
717 if (!ret) 723 if (!ret)
@@ -834,50 +840,32 @@ out:
834 return ret; 840 return ret;
835} 841}
836 842
837static ssize_t do_readv_writev(int type, struct file *file, 843static ssize_t __do_readv_writev(int type, struct file *file,
838 const struct iovec __user * uvector, 844 struct iov_iter *iter, loff_t *pos, int flags)
839 unsigned long nr_segs, loff_t *pos,
840 int flags)
841{ 845{
842 size_t tot_len; 846 size_t tot_len;
843 struct iovec iovstack[UIO_FASTIOV]; 847 ssize_t ret = 0;
844 struct iovec *iov = iovstack;
845 struct iov_iter iter;
846 ssize_t ret;
847 io_fn_t fn;
848 iter_fn_t iter_fn;
849
850 ret = import_iovec(type, uvector, nr_segs,
851 ARRAY_SIZE(iovstack), &iov, &iter);
852 if (ret < 0)
853 return ret;
854 848
855 tot_len = iov_iter_count(&iter); 849 tot_len = iov_iter_count(iter);
856 if (!tot_len) 850 if (!tot_len)
857 goto out; 851 goto out;
858 ret = rw_verify_area(type, file, pos, tot_len); 852 ret = rw_verify_area(type, file, pos, tot_len);
859 if (ret < 0) 853 if (ret < 0)
860 goto out; 854 goto out;
861 855
862 if (type == READ) { 856 if (type != READ)
863 fn = file->f_op->read;
864 iter_fn = file->f_op->read_iter;
865 } else {
866 fn = (io_fn_t)file->f_op->write;
867 iter_fn = file->f_op->write_iter;
868 file_start_write(file); 857 file_start_write(file);
869 }
870 858
871 if (iter_fn) 859 if ((type == READ && file->f_op->read_iter) ||
872 ret = do_iter_readv_writev(file, &iter, pos, iter_fn, flags); 860 (type == WRITE && file->f_op->write_iter))
861 ret = do_iter_readv_writev(file, iter, pos, type, flags);
873 else 862 else
874 ret = do_loop_readv_writev(file, &iter, pos, fn, flags); 863 ret = do_loop_readv_writev(file, iter, pos, type, flags);
875 864
876 if (type != READ) 865 if (type != READ)
877 file_end_write(file); 866 file_end_write(file);
878 867
879out: 868out:
880 kfree(iov);
881 if ((ret + (type == READ)) > 0) { 869 if ((ret + (type == READ)) > 0) {
882 if (type == READ) 870 if (type == READ)
883 fsnotify_access(file); 871 fsnotify_access(file);
@@ -887,6 +875,27 @@ out:
887 return ret; 875 return ret;
888} 876}
889 877
878static ssize_t do_readv_writev(int type, struct file *file,
879 const struct iovec __user *uvector,
880 unsigned long nr_segs, loff_t *pos,
881 int flags)
882{
883 struct iovec iovstack[UIO_FASTIOV];
884 struct iovec *iov = iovstack;
885 struct iov_iter iter;
886 ssize_t ret;
887
888 ret = import_iovec(type, uvector, nr_segs,
889 ARRAY_SIZE(iovstack), &iov, &iter);
890 if (ret < 0)
891 return ret;
892
893 ret = __do_readv_writev(type, file, &iter, pos, flags);
894 kfree(iov);
895
896 return ret;
897}
898
890ssize_t vfs_readv(struct file *file, const struct iovec __user *vec, 899ssize_t vfs_readv(struct file *file, const struct iovec __user *vec,
891 unsigned long vlen, loff_t *pos, int flags) 900 unsigned long vlen, loff_t *pos, int flags)
892{ 901{
@@ -1064,51 +1073,19 @@ static ssize_t compat_do_readv_writev(int type, struct file *file,
1064 unsigned long nr_segs, loff_t *pos, 1073 unsigned long nr_segs, loff_t *pos,
1065 int flags) 1074 int flags)
1066{ 1075{
1067 compat_ssize_t tot_len;
1068 struct iovec iovstack[UIO_FASTIOV]; 1076 struct iovec iovstack[UIO_FASTIOV];
1069 struct iovec *iov = iovstack; 1077 struct iovec *iov = iovstack;
1070 struct iov_iter iter; 1078 struct iov_iter iter;
1071 ssize_t ret; 1079 ssize_t ret;
1072 io_fn_t fn;
1073 iter_fn_t iter_fn;
1074 1080
1075 ret = compat_import_iovec(type, uvector, nr_segs, 1081 ret = compat_import_iovec(type, uvector, nr_segs,
1076 UIO_FASTIOV, &iov, &iter); 1082 UIO_FASTIOV, &iov, &iter);
1077 if (ret < 0) 1083 if (ret < 0)
1078 return ret; 1084 return ret;
1079 1085
1080 tot_len = iov_iter_count(&iter); 1086 ret = __do_readv_writev(type, file, &iter, pos, flags);
1081 if (!tot_len)
1082 goto out;
1083 ret = rw_verify_area(type, file, pos, tot_len);
1084 if (ret < 0)
1085 goto out;
1086
1087 if (type == READ) {
1088 fn = file->f_op->read;
1089 iter_fn = file->f_op->read_iter;
1090 } else {
1091 fn = (io_fn_t)file->f_op->write;
1092 iter_fn = file->f_op->write_iter;
1093 file_start_write(file);
1094 }
1095
1096 if (iter_fn)
1097 ret = do_iter_readv_writev(file, &iter, pos, iter_fn, flags);
1098 else
1099 ret = do_loop_readv_writev(file, &iter, pos, fn, flags);
1100
1101 if (type != READ)
1102 file_end_write(file);
1103
1104out:
1105 kfree(iov); 1087 kfree(iov);
1106 if ((ret + (type == READ)) > 0) { 1088
1107 if (type == READ)
1108 fsnotify_access(file);
1109 else
1110 fsnotify_modify(file);
1111 }
1112 return ret; 1089 return ret;
1113} 1090}
1114 1091
@@ -1518,6 +1495,11 @@ ssize_t vfs_copy_file_range(struct file *file_in, loff_t pos_in,
1518 if (flags != 0) 1495 if (flags != 0)
1519 return -EINVAL; 1496 return -EINVAL;
1520 1497
1498 if (S_ISDIR(inode_in->i_mode) || S_ISDIR(inode_out->i_mode))
1499 return -EISDIR;
1500 if (!S_ISREG(inode_in->i_mode) || !S_ISREG(inode_out->i_mode))
1501 return -EINVAL;
1502
1521 ret = rw_verify_area(READ, file_in, &pos_in, len); 1503 ret = rw_verify_area(READ, file_in, &pos_in, len);
1522 if (unlikely(ret)) 1504 if (unlikely(ret))
1523 return ret; 1505 return ret;
@@ -1538,7 +1520,7 @@ ssize_t vfs_copy_file_range(struct file *file_in, loff_t pos_in,
1538 if (len == 0) 1520 if (len == 0)
1539 return 0; 1521 return 0;
1540 1522
1541 sb_start_write(inode_out->i_sb); 1523 file_start_write(file_out);
1542 1524
1543 /* 1525 /*
1544 * Try cloning first, this is supported by more file systems, and 1526 * Try cloning first, this is supported by more file systems, and
@@ -1574,7 +1556,7 @@ done:
1574 inc_syscr(current); 1556 inc_syscr(current);
1575 inc_syscw(current); 1557 inc_syscw(current);
1576 1558
1577 sb_end_write(inode_out->i_sb); 1559 file_end_write(file_out);
1578 1560
1579 return ret; 1561 return ret;
1580} 1562}
diff --git a/fs/splice.c b/fs/splice.c
index 4ef78aa8ef61..eaafa3d8869a 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -307,7 +307,7 @@ ssize_t generic_file_splice_read(struct file *in, loff_t *ppos,
307 idx = to.idx; 307 idx = to.idx;
308 init_sync_kiocb(&kiocb, in); 308 init_sync_kiocb(&kiocb, in);
309 kiocb.ki_pos = *ppos; 309 kiocb.ki_pos = *ppos;
310 ret = in->f_op->read_iter(&kiocb, &to); 310 ret = call_read_iter(in, &kiocb, &to);
311 if (ret > 0) { 311 if (ret > 0) {
312 *ppos = kiocb.ki_pos; 312 *ppos = kiocb.ki_pos;
313 file_accessed(in); 313 file_accessed(in);
diff --git a/fs/sync.c b/fs/sync.c
index 2a54c1f22035..11ba023434b1 100644
--- a/fs/sync.c
+++ b/fs/sync.c
@@ -192,7 +192,7 @@ int vfs_fsync_range(struct file *file, loff_t start, loff_t end, int datasync)
192 spin_unlock(&inode->i_lock); 192 spin_unlock(&inode->i_lock);
193 mark_inode_dirty_sync(inode); 193 mark_inode_dirty_sync(inode);
194 } 194 }
195 return file->f_op->fsync(file, start, end, datasync); 195 return call_fsync(file, start, end, datasync);
196} 196}
197EXPORT_SYMBOL(vfs_fsync_range); 197EXPORT_SYMBOL(vfs_fsync_range);
198 198
diff --git a/include/linux/fs.h b/include/linux/fs.h
index c64f2cb7d364..52350947c670 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1567,6 +1567,9 @@ extern int vfs_unlink(struct inode *, struct dentry *, struct inode **);
1567extern int vfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *, struct inode **, unsigned int); 1567extern int vfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *, struct inode **, unsigned int);
1568extern int vfs_whiteout(struct inode *, struct dentry *); 1568extern int vfs_whiteout(struct inode *, struct dentry *);
1569 1569
1570extern struct dentry *vfs_tmpfile(struct dentry *dentry, umode_t mode,
1571 int open_flag);
1572
1570/* 1573/*
1571 * VFS file helper functions. 1574 * VFS file helper functions.
1572 */ 1575 */
@@ -1718,6 +1721,29 @@ struct inode_operations {
1718 int (*set_acl)(struct inode *, struct posix_acl *, int); 1721 int (*set_acl)(struct inode *, struct posix_acl *, int);
1719} ____cacheline_aligned; 1722} ____cacheline_aligned;
1720 1723
1724static inline ssize_t call_read_iter(struct file *file, struct kiocb *kio,
1725 struct iov_iter *iter)
1726{
1727 return file->f_op->read_iter(kio, iter);
1728}
1729
1730static inline ssize_t call_write_iter(struct file *file, struct kiocb *kio,
1731 struct iov_iter *iter)
1732{
1733 return file->f_op->write_iter(kio, iter);
1734}
1735
1736static inline int call_mmap(struct file *file, struct vm_area_struct *vma)
1737{
1738 return file->f_op->mmap(file, vma);
1739}
1740
1741static inline int call_fsync(struct file *file, loff_t start, loff_t end,
1742 int datasync)
1743{
1744 return file->f_op->fsync(file, start, end, datasync);
1745}
1746
1721ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector, 1747ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector,
1722 unsigned long nr_segs, unsigned long fast_segs, 1748 unsigned long nr_segs, unsigned long fast_segs,
1723 struct iovec *fast_pointer, 1749 struct iovec *fast_pointer,
@@ -1744,19 +1770,6 @@ extern int vfs_dedupe_file_range_compare(struct inode *src, loff_t srcoff,
1744extern int vfs_dedupe_file_range(struct file *file, 1770extern int vfs_dedupe_file_range(struct file *file,
1745 struct file_dedupe_range *same); 1771 struct file_dedupe_range *same);
1746 1772
1747static inline int do_clone_file_range(struct file *file_in, loff_t pos_in,
1748 struct file *file_out, loff_t pos_out,
1749 u64 len)
1750{
1751 int ret;
1752
1753 sb_start_write(file_inode(file_out)->i_sb);
1754 ret = vfs_clone_file_range(file_in, pos_in, file_out, pos_out, len);
1755 sb_end_write(file_inode(file_out)->i_sb);
1756
1757 return ret;
1758}
1759
1760struct super_operations { 1773struct super_operations {
1761 struct inode *(*alloc_inode)(struct super_block *sb); 1774 struct inode *(*alloc_inode)(struct super_block *sb);
1762 void (*destroy_inode)(struct inode *); 1775 void (*destroy_inode)(struct inode *);
@@ -2568,6 +2581,19 @@ static inline void file_end_write(struct file *file)
2568 __sb_end_write(file_inode(file)->i_sb, SB_FREEZE_WRITE); 2581 __sb_end_write(file_inode(file)->i_sb, SB_FREEZE_WRITE);
2569} 2582}
2570 2583
2584static inline int do_clone_file_range(struct file *file_in, loff_t pos_in,
2585 struct file *file_out, loff_t pos_out,
2586 u64 len)
2587{
2588 int ret;
2589
2590 file_start_write(file_out);
2591 ret = vfs_clone_file_range(file_in, pos_in, file_out, pos_out, len);
2592 file_end_write(file_out);
2593
2594 return ret;
2595}
2596
2571/* 2597/*
2572 * get_write_access() gets write permission for a file. 2598 * get_write_access() gets write permission for a file.
2573 * put_write_access() releases this write permission. 2599 * put_write_access() releases this write permission.
diff --git a/ipc/shm.c b/ipc/shm.c
index 06ea9ef7f54a..481d2a9c298a 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -423,7 +423,7 @@ static int shm_mmap(struct file *file, struct vm_area_struct *vma)
423 if (ret) 423 if (ret)
424 return ret; 424 return ret;
425 425
426 ret = sfd->file->f_op->mmap(sfd->file, vma); 426 ret = call_mmap(sfd->file, vma);
427 if (ret) { 427 if (ret) {
428 shm_close(vma); 428 shm_close(vma);
429 return ret; 429 return ret;
@@ -452,7 +452,7 @@ static int shm_fsync(struct file *file, loff_t start, loff_t end, int datasync)
452 452
453 if (!sfd->file->f_op->fsync) 453 if (!sfd->file->f_op->fsync)
454 return -EINVAL; 454 return -EINVAL;
455 return sfd->file->f_op->fsync(sfd->file, start, end, datasync); 455 return call_fsync(sfd->file, start, end, datasync);
456} 456}
457 457
458static long shm_fallocate(struct file *file, int mode, loff_t offset, 458static long shm_fallocate(struct file *file, int mode, loff_t offset,
diff --git a/mm/mmap.c b/mm/mmap.c
index 499b988b1639..bfbe8856d134 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1672,7 +1672,7 @@ unsigned long mmap_region(struct file *file, unsigned long addr,
1672 * new file must not have been exposed to user-space, yet. 1672 * new file must not have been exposed to user-space, yet.
1673 */ 1673 */
1674 vma->vm_file = get_file(file); 1674 vma->vm_file = get_file(file);
1675 error = file->f_op->mmap(file, vma); 1675 error = call_mmap(file, vma);
1676 if (error) 1676 if (error)
1677 goto unmap_and_free_vma; 1677 goto unmap_and_free_vma;
1678 1678
diff --git a/mm/nommu.c b/mm/nommu.c
index fe9f4fa4a7a7..5bbef9cb89eb 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -1084,7 +1084,7 @@ static int do_mmap_shared_file(struct vm_area_struct *vma)
1084{ 1084{
1085 int ret; 1085 int ret;
1086 1086
1087 ret = vma->vm_file->f_op->mmap(vma->vm_file, vma); 1087 ret = call_mmap(vma->vm_file, vma);
1088 if (ret == 0) { 1088 if (ret == 0) {
1089 vma->vm_region->vm_top = vma->vm_region->vm_end; 1089 vma->vm_region->vm_top = vma->vm_region->vm_end;
1090 return 0; 1090 return 0;
@@ -1115,7 +1115,7 @@ static int do_mmap_private(struct vm_area_struct *vma,
1115 * - VM_MAYSHARE will be set if it may attempt to share 1115 * - VM_MAYSHARE will be set if it may attempt to share
1116 */ 1116 */
1117 if (capabilities & NOMMU_MAP_DIRECT) { 1117 if (capabilities & NOMMU_MAP_DIRECT) {
1118 ret = vma->vm_file->f_op->mmap(vma->vm_file, vma); 1118 ret = call_mmap(vma->vm_file, vma);
1119 if (ret == 0) { 1119 if (ret == 0) {
1120 /* shouldn't return success if we're not sharing */ 1120 /* shouldn't return success if we're not sharing */
1121 BUG_ON(!(vma->vm_flags & VM_MAYSHARE)); 1121 BUG_ON(!(vma->vm_flags & VM_MAYSHARE));
generated by cgit v1.2.2 (git 2.25.0) at 2025-12-29 08:09:51 -0500