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authorLinus Torvalds <torvalds@linux-foundation.org>2015-04-16 23:27:56 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2015-04-16 23:27:56 -0400
commit4fc8adcfec3da639da76e8314c9ccefe5bf9a045 (patch)
treee07a2dea8acf04d8bbbecd4fd3a571653ecdd953 /fs/xfs
parent84588e7a5d8220446d677d7b909a20ee7a4496b9 (diff)
parentaa4d86163e4e91a1ac560954a554bab417e338f4 (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull third hunk of vfs changes from Al Viro: "This contains the ->direct_IO() changes from Omar + saner generic_write_checks() + dealing with fcntl()/{read,write}() races (mirroring O_APPEND/O_DIRECT into iocb->ki_flags and instead of repeatedly looking at ->f_flags, which can be changed by fcntl(2), check ->ki_flags - which cannot) + infrastructure bits for dhowells' d_inode annotations + Christophs switch of /dev/loop to vfs_iter_write()" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (30 commits) block: loop: switch to VFS ITER_BVEC configfs: Fix inconsistent use of file_inode() vs file->f_path.dentry->d_inode VFS: Make pathwalk use d_is_reg() rather than S_ISREG() VFS: Fix up debugfs to use d_is_dir() in place of S_ISDIR() VFS: Combine inode checks with d_is_negative() and d_is_positive() in pathwalk NFS: Don't use d_inode as a variable name VFS: Impose ordering on accesses of d_inode and d_flags VFS: Add owner-filesystem positive/negative dentry checks nfs: generic_write_checks() shouldn't be done on swapout... ocfs2: use __generic_file_write_iter() mirror O_APPEND and O_DIRECT into iocb->ki_flags switch generic_write_checks() to iocb and iter ocfs2: move generic_write_checks() before the alignment checks ocfs2_file_write_iter: stop messing with ppos udf_file_write_iter: reorder and simplify fuse: ->direct_IO() doesn't need generic_write_checks() ext4_file_write_iter: move generic_write_checks() up xfs_file_aio_write_checks: switch to iocb/iov_iter generic_write_checks(): drop isblk argument blkdev_write_iter: expand generic_file_checks() call in there ...
Diffstat (limited to 'fs/xfs')
-rw-r--r--fs/xfs/xfs_aops.c12
-rw-r--r--fs/xfs/xfs_file.c39
2 files changed, 25 insertions, 26 deletions
diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
index 4f8cdc59bc38..1d8eef9cf0f5 100644
--- a/fs/xfs/xfs_aops.c
+++ b/fs/xfs/xfs_aops.c
@@ -1495,7 +1495,6 @@ xfs_end_io_direct_write(
STATIC ssize_t
xfs_vm_direct_IO(
- int rw,
struct kiocb *iocb,
struct iov_iter *iter,
loff_t offset)
@@ -1503,15 +1502,14 @@ xfs_vm_direct_IO(
struct inode *inode = iocb->ki_filp->f_mapping->host;
struct block_device *bdev = xfs_find_bdev_for_inode(inode);
- if (rw & WRITE) {
- return __blockdev_direct_IO(rw, iocb, inode, bdev, iter,
- offset, xfs_get_blocks_direct,
+ if (iov_iter_rw(iter) == WRITE) {
+ return __blockdev_direct_IO(iocb, inode, bdev, iter, offset,
+ xfs_get_blocks_direct,
xfs_end_io_direct_write, NULL,
DIO_ASYNC_EXTEND);
}
- return __blockdev_direct_IO(rw, iocb, inode, bdev, iter,
- offset, xfs_get_blocks_direct,
- NULL, NULL, 0);
+ return __blockdev_direct_IO(iocb, inode, bdev, iter, offset,
+ xfs_get_blocks_direct, NULL, NULL, 0);
}
/*
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 44856c3b9617..1f12ad0a8585 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -279,7 +279,7 @@ xfs_file_read_iter(
XFS_STATS_INC(xs_read_calls);
- if (unlikely(file->f_flags & O_DIRECT))
+ if (unlikely(iocb->ki_flags & IOCB_DIRECT))
ioflags |= XFS_IO_ISDIRECT;
if (file->f_mode & FMODE_NOCMTIME)
ioflags |= XFS_IO_INVIS;
@@ -544,18 +544,19 @@ xfs_zero_eof(
*/
STATIC ssize_t
xfs_file_aio_write_checks(
- struct file *file,
- loff_t *pos,
- size_t *count,
+ struct kiocb *iocb,
+ struct iov_iter *from,
int *iolock)
{
+ struct file *file = iocb->ki_filp;
struct inode *inode = file->f_mapping->host;
struct xfs_inode *ip = XFS_I(inode);
- int error = 0;
+ ssize_t error = 0;
+ size_t count = iov_iter_count(from);
restart:
- error = generic_write_checks(file, pos, count, S_ISBLK(inode->i_mode));
- if (error)
+ error = generic_write_checks(iocb, from);
+ if (error <= 0)
return error;
error = xfs_break_layouts(inode, iolock);
@@ -569,16 +570,17 @@ restart:
* iolock shared, we need to update it to exclusive which implies
* having to redo all checks before.
*/
- if (*pos > i_size_read(inode)) {
+ if (iocb->ki_pos > i_size_read(inode)) {
bool zero = false;
if (*iolock == XFS_IOLOCK_SHARED) {
xfs_rw_iunlock(ip, *iolock);
*iolock = XFS_IOLOCK_EXCL;
xfs_rw_ilock(ip, *iolock);
+ iov_iter_reexpand(from, count);
goto restart;
}
- error = xfs_zero_eof(ip, *pos, i_size_read(inode), &zero);
+ error = xfs_zero_eof(ip, iocb->ki_pos, i_size_read(inode), &zero);
if (error)
return error;
}
@@ -678,10 +680,11 @@ xfs_file_dio_aio_write(
xfs_rw_ilock(ip, iolock);
}
- ret = xfs_file_aio_write_checks(file, &pos, &count, &iolock);
+ ret = xfs_file_aio_write_checks(iocb, from, &iolock);
if (ret)
goto out;
- iov_iter_truncate(from, count);
+ count = iov_iter_count(from);
+ pos = iocb->ki_pos;
if (mapping->nrpages) {
ret = filemap_write_and_wait_range(VFS_I(ip)->i_mapping,
@@ -734,24 +737,22 @@ xfs_file_buffered_aio_write(
ssize_t ret;
int enospc = 0;
int iolock = XFS_IOLOCK_EXCL;
- loff_t pos = iocb->ki_pos;
- size_t count = iov_iter_count(from);
xfs_rw_ilock(ip, iolock);
- ret = xfs_file_aio_write_checks(file, &pos, &count, &iolock);
+ ret = xfs_file_aio_write_checks(iocb, from, &iolock);
if (ret)
goto out;
- iov_iter_truncate(from, count);
/* We can write back this queue in page reclaim */
current->backing_dev_info = inode_to_bdi(inode);
write_retry:
- trace_xfs_file_buffered_write(ip, count, iocb->ki_pos, 0);
- ret = generic_perform_write(file, from, pos);
+ trace_xfs_file_buffered_write(ip, iov_iter_count(from),
+ iocb->ki_pos, 0);
+ ret = generic_perform_write(file, from, iocb->ki_pos);
if (likely(ret >= 0))
- iocb->ki_pos = pos + ret;
+ iocb->ki_pos += ret;
/*
* If we hit a space limit, try to free up some lingering preallocated
@@ -803,7 +804,7 @@ xfs_file_write_iter(
if (XFS_FORCED_SHUTDOWN(ip->i_mount))
return -EIO;
- if (unlikely(file->f_flags & O_DIRECT))
+ if (unlikely(iocb->ki_flags & IOCB_DIRECT))
ret = xfs_file_dio_aio_write(iocb, from);
else
ret = xfs_file_buffered_aio_write(iocb, from);