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[PATCH] ocfs2: use generic_segment_checks

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Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
This commit is contained in:
Christoph Hellwig 2007-05-18 13:12:40 +02:00 • committed by Mark Fasheh
parent 8fccfc829a
commit d9b08b9efe
1 changed files with 1 additions and 31 deletions
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32
fs/ocfs2/file.c
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@ -1419,36 +1419,6 @@ out:
return total ? total : ret; return total ? total : ret;
} }
static int ocfs2_check_iovec(const struct iovec *iov, size_t *counted,
unsigned long *nr_segs)
{
size_t ocount; /* original count */
unsigned long seg;
ocount = 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.
*/
ocount += iv->iov_len;
if (unlikely((ssize_t)(ocount|iv->iov_len) < 0))
return -EINVAL;
if (access_ok(VERIFY_READ, iv->iov_base, iv->iov_len))
continue;
if (seg == 0)
return -EFAULT;
*nr_segs = seg;
ocount -= iv->iov_len; /* This segment is no good */
break;
}
*counted = ocount;
return 0;
}
static ssize_t ocfs2_file_aio_write(struct kiocb *iocb, static ssize_t ocfs2_file_aio_write(struct kiocb *iocb,
const struct iovec *iov, const struct iovec *iov,
unsigned long nr_segs, unsigned long nr_segs,
@ -1471,7 +1441,7 @@ static ssize_t ocfs2_file_aio_write(struct kiocb *iocb,
if (iocb->ki_left == 0) if (iocb->ki_left == 0)
return 0; return 0;
ret = ocfs2_check_iovec(iov, &ocount, &nr_segs); ret = generic_segment_checks(iov, &nr_segs, &ocount, VERIFY_READ);
if (ret) if (ret)
return ret; return ret;