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authorLinus Torvalds <torvalds@linux-foundation.org>2017-07-05 14:35:57 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-07-05 14:35:57 -0700
commit89fbf5384ddf666a595eb6562dc63fcbfeb8f6a5 (patch)
treefc2de270b1dae61f850e9aff0784a672667e2acc /fs/nfsd/vfs.c
parent4be95131bf3bca97b6a7db9c6fb63db2cb94da06 (diff)
parenta4058c5bce8aded1a12a59990e84e481a96fb490 (diff)
Merge branch 'work.read_write' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull read/write updates from Al Viro: "Christoph's fs/read_write.c series - consolidation and cleanups" * 'work.read_write' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: nfsd: remove nfsd_vfs_read nfsd: use vfs_iter_read/write fs: implement vfs_iter_write using do_iter_write fs: implement vfs_iter_read using do_iter_read fs: move more code into do_iter_read/do_iter_write fs: remove __do_readv_writev fs: remove do_compat_readv_writev fs: remove do_readv_writev
Diffstat (limited to 'fs/nfsd/vfs.c')
-rw-r--r--fs/nfsd/vfs.c34
1 files changed, 13 insertions, 21 deletions
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 6eef95c585e3..38d0383dc7f9 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -911,24 +911,13 @@ __be32 nfsd_splice_read(struct svc_rqst *rqstp,
__be32 nfsd_readv(struct file *file, loff_t offset, struct kvec *vec, int vlen,
unsigned long *count)
{
- mm_segment_t oldfs;
+ struct iov_iter iter;
int host_err;
- oldfs = get_fs();
- set_fs(KERNEL_DS);
- host_err = vfs_readv(file, (struct iovec __user *)vec, vlen, &offset, 0);
- set_fs(oldfs);
- return nfsd_finish_read(file, count, host_err);
-}
+ iov_iter_kvec(&iter, READ | ITER_KVEC, vec, vlen, *count);
+ host_err = vfs_iter_read(file, &iter, &offset, 0);
-static __be32
-nfsd_vfs_read(struct svc_rqst *rqstp, struct file *file,
- loff_t offset, struct kvec *vec, int vlen, unsigned long *count)
-{
- if (file->f_op->splice_read && test_bit(RQ_SPLICE_OK, &rqstp->rq_flags))
- return nfsd_splice_read(rqstp, file, offset, count);
- else
- return nfsd_readv(file, offset, vec, vlen, count);
+ return nfsd_finish_read(file, count, host_err);
}
/*
@@ -974,7 +963,7 @@ nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file,
unsigned long *cnt, int stable)
{
struct svc_export *exp;
- mm_segment_t oldfs;
+ struct iov_iter iter;
__be32 err = 0;
int host_err;
int use_wgather;
@@ -1000,10 +989,8 @@ nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file,
if (stable && !use_wgather)
flags |= RWF_SYNC;
- /* Write the data. */
- oldfs = get_fs(); set_fs(KERNEL_DS);
- host_err = vfs_writev(file, (struct iovec __user *)vec, vlen, &pos, flags);
- set_fs(oldfs);
+ iov_iter_kvec(&iter, WRITE | ITER_KVEC, vec, vlen, *cnt);
+ host_err = vfs_iter_write(file, &iter, &pos, flags);
if (host_err < 0)
goto out_nfserr;
*cnt = host_err;
@@ -1044,7 +1031,12 @@ __be32 nfsd_read(struct svc_rqst *rqstp, struct svc_fh *fhp,
ra = nfsd_init_raparms(file);
trace_read_opened(rqstp, fhp, offset, vlen);
- err = nfsd_vfs_read(rqstp, file, offset, vec, vlen, count);
+
+ if (file->f_op->splice_read && test_bit(RQ_SPLICE_OK, &rqstp->rq_flags))
+ err = nfsd_splice_read(rqstp, file, offset, count);
+ else
+ err = nfsd_readv(file, offset, vec, vlen, count);
+
trace_read_io_done(rqstp, fhp, offset, vlen);
if (ra)