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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/udf/file.c
parent84588e7a5d8220446d677d7b909a20ee7a4496b9 (diff)
parentaa4d86163e4e91a1ac560954a554bab417e338f4 (diff)
downloadlinux-stericsson-4fc8adcfec3da639da76e8314c9ccefe5bf9a045.tar.gz
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/udf/file.c')
-rw-r--r--fs/udf/file.c25
1 files changed, 11 insertions, 14 deletions
diff --git a/fs/udf/file.c b/fs/udf/file.c
index f77f7681288f..5dadad9960b9 100644
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -99,8 +99,7 @@ static int udf_adinicb_write_begin(struct file *file,
return 0;
}
-static ssize_t udf_adinicb_direct_IO(int rw, struct kiocb *iocb,
- struct iov_iter *iter,
+static ssize_t udf_adinicb_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
loff_t offset)
{
/* Fallback to buffered I/O. */
@@ -120,21 +119,21 @@ static ssize_t udf_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
ssize_t retval;
struct file *file = iocb->ki_filp;
struct inode *inode = file_inode(file);
- int err, pos;
- size_t count = iov_iter_count(from);
struct udf_inode_info *iinfo = UDF_I(inode);
+ int err;
mutex_lock(&inode->i_mutex);
+
+ retval = generic_write_checks(iocb, from);
+ if (retval <= 0)
+ goto out;
+
down_write(&iinfo->i_data_sem);
if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
- if (file->f_flags & O_APPEND)
- pos = inode->i_size;
- else
- pos = iocb->ki_pos;
+ loff_t end = iocb->ki_pos + iov_iter_count(from);
if (inode->i_sb->s_blocksize <
- (udf_file_entry_alloc_offset(inode) +
- pos + count)) {
+ (udf_file_entry_alloc_offset(inode) + end)) {
err = udf_expand_file_adinicb(inode);
if (err) {
mutex_unlock(&inode->i_mutex);
@@ -142,16 +141,14 @@ static ssize_t udf_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
return err;
}
} else {
- if (pos + count > inode->i_size)
- iinfo->i_lenAlloc = pos + count;
- else
- iinfo->i_lenAlloc = inode->i_size;
+ iinfo->i_lenAlloc = max(end, inode->i_size);
up_write(&iinfo->i_data_sem);
}
} else
up_write(&iinfo->i_data_sem);
retval = __generic_file_write_iter(iocb, from);
+out:
mutex_unlock(&inode->i_mutex);
if (retval > 0) {