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authorMatthew Wilcox <willy@infradead.org>2018-07-12 00:02:21 +0300
committerDominique Martinet <dominique.martinet@cea.fr>2018-08-13 03:21:44 +0300
commitb5303be2bee3c8b29de3f7f4ea8ae00c4e816760 (patch)
treeec2fe0f66140706c972f18502459d868aa2ec3a5 /net/9p
parent2d58f63f72f28ba297a9ae344a5b5f0cf75bcd94 (diff)
downloadlinux-b5303be2bee3c8b29de3f7f4ea8ae00c4e816760.tar.xz
9p: Change p9_fid_create calling convention
Return NULL instead of ERR_PTR when we can't allocate a FID. The ENOSPC return value was getting all the way back to userspace, and that's confusing for a userspace program which isn't expecting read() to tell it there's no space left on the filesystem. The best error we can return to indicate a temporary failure caused by lack of client resources is ENOMEM. Maybe it would be better to sleep until a FID is available, but that's not a change I'm comfortable making. Link: http://lkml.kernel.org/r/20180711210225.19730-3-willy@infradead.org Signed-off-by: Matthew Wilcox <willy@infradead.org> Reviewed-by: Jun Piao <piaojun@huawei.com> Reviewed-by: Greg Kurz <groug@kaod.org> Reviewed-by: Yiwen Jiang <jiangyiwen@huwei.com> Cc: Eric Van Hensbergen <ericvh@gmail.com> Cc: Ron Minnich <rminnich@sandia.gov> Cc: Latchesar Ionkov <lucho@ionkov.net> Signed-off-by: Dominique Martinet <dominique.martinet@cea.fr>
Diffstat (limited to 'net/9p')
-rw-r--r--net/9p/client.c23
1 files changed, 9 insertions, 14 deletions
diff --git a/net/9p/client.c b/net/9p/client.c
index cae1fb43bd16..7c317d39bf62 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -914,13 +914,11 @@ static struct p9_fid *p9_fid_create(struct p9_client *clnt)
p9_debug(P9_DEBUG_FID, "clnt %p\n", clnt);
fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL);
if (!fid)
- return ERR_PTR(-ENOMEM);
+ return NULL;
ret = p9_idpool_get(clnt->fidpool);
- if (ret < 0) {
- ret = -ENOSPC;
+ if (ret < 0)
goto error;
- }
fid->fid = ret;
memset(&fid->qid, 0, sizeof(struct p9_qid));
@@ -936,7 +934,7 @@ static struct p9_fid *p9_fid_create(struct p9_client *clnt)
error:
kfree(fid);
- return ERR_PTR(ret);
+ return NULL;
}
static void p9_fid_destroy(struct p9_fid *fid)
@@ -1138,9 +1136,8 @@ struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid,
p9_debug(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n",
afid ? afid->fid : -1, uname, aname);
fid = p9_fid_create(clnt);
- if (IS_ERR(fid)) {
- err = PTR_ERR(fid);
- fid = NULL;
+ if (!fid) {
+ err = -ENOMEM;
goto error;
}
fid->uid = n_uname;
@@ -1189,9 +1186,8 @@ struct p9_fid *p9_client_walk(struct p9_fid *oldfid, uint16_t nwname,
clnt = oldfid->clnt;
if (clone) {
fid = p9_fid_create(clnt);
- if (IS_ERR(fid)) {
- err = PTR_ERR(fid);
- fid = NULL;
+ if (!fid) {
+ err = -ENOMEM;
goto error;
}
@@ -2019,9 +2015,8 @@ struct p9_fid *p9_client_xattrwalk(struct p9_fid *file_fid,
err = 0;
clnt = file_fid->clnt;
attr_fid = p9_fid_create(clnt);
- if (IS_ERR(attr_fid)) {
- err = PTR_ERR(attr_fid);
- attr_fid = NULL;
+ if (!attr_fid) {
+ err = -ENOMEM;
goto error;
}
p9_debug(P9_DEBUG_9P,