diff options
| -rw-r--r-- | drivers/staging/lustre/lustre/llite/file.c | 10 | ||||
| -rw-r--r-- | fs/btrfs/file.c | 7 | ||||
| -rw-r--r-- | fs/ceph/file.c | 13 | ||||
| -rw-r--r-- | fs/fuse/file.c | 7 | ||||
| -rw-r--r-- | fs/ntfs/file.c | 5 | ||||
| -rw-r--r-- | fs/ocfs2/file.c | 7 | ||||
| -rw-r--r-- | fs/xfs/xfs_file.c | 9 | ||||
| -rw-r--r-- | include/linux/fs.h | 2 | ||||
| -rw-r--r-- | mm/filemap.c | 53 | ||||
| -rw-r--r-- | mm/shmem.c | 7 |
10 files changed, 16 insertions, 104 deletions
diff --git a/drivers/staging/lustre/lustre/llite/file.c b/drivers/staging/lustre/lustre/llite/file.c index 8e844a6..220bd83 100644 --- a/drivers/staging/lustre/lustre/llite/file.c +++ b/drivers/staging/lustre/lustre/llite/file.c @@ -1180,9 +1180,7 @@ static ssize_t ll_file_aio_read(struct kiocb *iocb, const struct iovec *iov, ssize_t result; int refcheck; - result = generic_segment_checks(iov, &nr_segs, &count, VERIFY_WRITE); - if (result) - return result; + count = iov_length(iov, nr_segs); env = cl_env_get(&refcheck); if (IS_ERR(env)) @@ -1235,14 +1233,10 @@ static ssize_t ll_file_aio_write(struct kiocb *iocb, const struct iovec *iov, { struct lu_env *env; struct vvp_io_args *args; - size_t count = 0; + size_t count = iov_length(iov, nr_segs); ssize_t result; int refcheck; - result = generic_segment_checks(iov, &nr_segs, &count, VERIFY_READ); - if (result) - return result; - env = cl_env_get(&refcheck); if (IS_ERR(env)) return PTR_ERR(env); diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index 1dafe07..a0a94a3 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -1726,12 +1726,7 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb, mutex_lock(&inode->i_mutex); - err = generic_segment_checks(iov, &nr_segs, &ocount, VERIFY_READ); - if (err) { - mutex_unlock(&inode->i_mutex); - goto out; - } - count = ocount; + count = ocount = iov_length(iov, nr_segs); current->backing_dev_info = inode->i_mapping->backing_dev_info; err = generic_write_checks(file, &pos, &count, S_ISBLK(inode->i_mode)); diff --git a/fs/ceph/file.c b/fs/ceph/file.c index ef9115e..21a56c2 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -828,12 +828,8 @@ again: inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len, ceph_cap_string(got)); - if (!read) { - ret = generic_segment_checks(iov, &nr_segs, - &len, VERIFY_WRITE); - if (ret) - goto out; - } + if (!read) + len = iov_length(iov, nr_segs); iov_iter_init(&i, iov, nr_segs, len, read); @@ -855,7 +851,6 @@ again: ret = generic_file_aio_read(iocb, iov, nr_segs, pos); } -out: dout("aio_read %p %llx.%llx dropping cap refs on %s = %d\n", inode, ceph_vinop(inode), ceph_cap_string(got), (int)ret); ceph_put_cap_refs(ci, got); @@ -911,9 +906,7 @@ static ssize_t ceph_aio_write(struct kiocb *iocb, const struct iovec *iov, mutex_lock(&inode->i_mutex); - err = generic_segment_checks(iov, &nr_segs, &count, VERIFY_READ); - if (err) - goto out; + count = iov_length(iov, nr_segs); /* We can write back this queue in page reclaim */ current->backing_dev_info = file->f_mapping->backing_dev_info; diff --git a/fs/fuse/file.c b/fs/fuse/file.c index 126deb5..9c7f346 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -1208,12 +1208,7 @@ static ssize_t fuse_file_aio_write(struct kiocb *iocb, const struct iovec *iov, WARN_ON(iocb->ki_pos != pos); - ocount = 0; - err = generic_segment_checks(iov, &nr_segs, &ocount, VERIFY_READ); - if (err) - return err; - - count = ocount; + count = ocount = iov_length(iov, nr_segs); mutex_lock(&inode->i_mutex); /* We can write back this queue in page reclaim */ diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c index db9bd8a..b6fa457 100644 --- a/fs/ntfs/file.c +++ b/fs/ntfs/file.c @@ -2091,10 +2091,7 @@ static ssize_t ntfs_file_aio_write_nolock(struct kiocb *iocb, size_t count; /* after file limit checks */ ssize_t written, err; - count = 0; - err = generic_segment_checks(iov, &nr_segs, &count, VERIFY_READ); - if (err) - return err; + count = iov_length(iov, nr_segs); pos = *ppos; /* We can write back this queue in page reclaim. */ current->backing_dev_info = mapping->backing_dev_info; diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c index d6d78c2..d33c4ce 100644 --- a/fs/ocfs2/file.c +++ b/fs/ocfs2/file.c @@ -2355,12 +2355,7 @@ relock: /* communicate with ocfs2_dio_end_io */ ocfs2_iocb_set_rw_locked(iocb, rw_level); - ret = generic_segment_checks(iov, &nr_segs, &ocount, - VERIFY_READ); - if (ret) - goto out_dio; - - count = ocount; + count = ocount = iov_length(iov, nr_segs); ret = generic_write_checks(file, ppos, &count, S_ISBLK(inode->i_mode)); if (ret) diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index 8617497..f0f8084 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -253,9 +253,7 @@ xfs_file_aio_read( if (file->f_mode & FMODE_NOCMTIME) ioflags |= IO_INVIS; - ret = generic_segment_checks(iovp, &nr_segs, &size, VERIFY_WRITE); - if (ret < 0) - return ret; + size = iov_length(iovp, nr_segs); if (unlikely(ioflags & IO_ISDIRECT)) { xfs_buftarg_t *target = @@ -777,10 +775,7 @@ xfs_file_aio_write( BUG_ON(iocb->ki_pos != pos); - ret = generic_segment_checks(iovp, &nr_segs, &ocount, VERIFY_READ); - if (ret) - return ret; - + ocount = iov_length(iovp, nr_segs); if (ocount == 0) return 0; diff --git a/include/linux/fs.h b/include/linux/fs.h index 262f96e..796de74 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2412,8 +2412,6 @@ extern ssize_t generic_file_direct_write(struct kiocb *, struct iov_iter *, extern ssize_t generic_perform_write(struct file *, struct iov_iter *, loff_t); extern ssize_t do_sync_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos); extern ssize_t do_sync_write(struct file *filp, const char __user *buf, size_t len, loff_t *ppos); -extern int generic_segment_checks(const struct iovec *iov, - unsigned long *nr_segs, size_t *count, int access_flags); /* fs/block_dev.c */ extern ssize_t blkdev_aio_write(struct kiocb *iocb, const struct iovec *iov, diff --git a/mm/filemap.c b/mm/filemap.c index a840890..7c1417b 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -1663,45 +1663,6 @@ out: return written ? written : error; } -/* - * Performs necessary checks before doing a write - * @iov: io vector request - * @nr_segs: number of segments in the iovec - * @count: number of bytes to write - * @access_flags: type of access: %VERIFY_READ or %VERIFY_WRITE - * - * Adjust number of segments and amount of bytes to write (nr_segs should be - * properly initialized first). Returns appropriate error code that caller - * should return or zero in case that write should be allowed. - */ -int generic_segment_checks(const struct iovec *iov, - unsigned long *nr_segs, size_t *count, int access_flags) -{ - unsigned long seg; - size_t cnt = 0; - for (seg = 0; seg < *nr_segs; seg++) { - const struct iovec *iv = &iov[seg]; - - /* - * If any segment has a negative length, or the cumulative - * length ever wraps negative then return -EINVAL. - */ - cnt += iv->iov_len; - if (unlikely((ssize_t)(cnt|iv->iov_len) < 0)) - return -EINVAL; - if (access_ok(access_flags, iv->iov_base, iv->iov_len)) - continue; - if (seg == 0) - return -EFAULT; - *nr_segs = seg; - cnt -= iv->iov_len; /* This segment is no good */ - break; - } - *count = cnt; - return 0; -} -EXPORT_SYMBOL(generic_segment_checks); - /** * generic_file_aio_read - generic filesystem read routine * @iocb: kernel I/O control block @@ -1717,15 +1678,12 @@ generic_file_aio_read(struct kiocb *iocb, const struct iovec *iov, unsigned long nr_segs, loff_t pos) { struct file *filp = iocb->ki_filp; - ssize_t retval; + ssize_t retval = 0; size_t count; loff_t *ppos = &iocb->ki_pos; struct iov_iter i; - count = 0; - retval = generic_segment_checks(iov, &nr_segs, &count, VERIFY_WRITE); - if (retval) - return retval; + count = iov_length(iov, nr_segs); iov_iter_init(&i, iov, nr_segs, count, 0); /* coalesce the iovecs and go direct-to-BIO for O_DIRECT */ @@ -2615,12 +2573,7 @@ ssize_t __generic_file_aio_write(struct kiocb *iocb, const struct iovec *iov, ssize_t status; struct iov_iter from; - ocount = 0; - err = generic_segment_checks(iov, &nr_segs, &ocount, VERIFY_READ); - if (err) - return err; - - count = ocount; + count = ocount = iov_length(iov, nr_segs); /* We can write back this queue in page reclaim */ current->backing_dev_info = mapping->backing_dev_info; @@ -1412,14 +1412,11 @@ static ssize_t shmem_file_aio_read(struct kiocb *iocb, unsigned long offset; enum sgp_type sgp = SGP_READ; int error = 0; - ssize_t retval; - size_t count; + ssize_t retval = 0; + size_t count = iov_length(iov, nr_segs); loff_t *ppos = &iocb->ki_pos; struct iov_iter iter; - retval = generic_segment_checks(iov, &nr_segs, &count, VERIFY_WRITE); - if (retval) - return retval; iov_iter_init(&iter, iov, nr_segs, count, 0); /* |
