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XArray: Change xa_insert to return -EBUSY

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Userspace translates EEXIST to "File exists" which isn't a very good
error message for the problem.  "Device or resource busy" is a better
indication of what went wrong.

Signed-off-by: Matthew Wilcox <willy@infradead.org>
This commit is contained in:
Matthew Wilcox
2019-02-06 13:07:11 -05:00
parent 809ab9371c
commit fd9dc93e36
5 changed files with 9 additions and 9 deletions
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4
lib/xarray.c
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@@ -1451,7 +1451,7 @@ EXPORT_SYMBOL(__xa_cmpxchg);
*
* Context: Any context. Expects xa_lock to be held on entry. May
* release and reacquire xa_lock if @gfp flags permit.
* Return: 0 if the store succeeded. -EEXIST if another entry was present.
* Return: 0 if the store succeeded. -EBUSY if another entry was present.
* -ENOMEM if memory could not be allocated.
*/
int __xa_insert(struct xarray *xa, unsigned long index, void *entry, gfp_t gfp)
@@ -1471,7 +1471,7 @@ int __xa_insert(struct xarray *xa, unsigned long index, void *entry, gfp_t gfp)
if (xa_track_free(xa))
xas_clear_mark(&xas, XA_FREE_MARK);
} else {
xas_set_err(&xas, -EEXIST);
xas_set_err(&xas, -EBUSY);
}
} while (__xas_nomem(&xas, gfp));