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| author | Matthew Wilcox <willy@infradead.org> | 2018-07-11 23:02:21 +0200 |
|---|---|---|
| committer | Dominique Martinet <dominique.martinet@cea.fr> | 2018-08-13 02:21:44 +0200 |
| commit | b5303be2bee3c8b29de3f7f4ea8ae00c4e816760 (patch) | |
| tree | ec2fe0f66140706c972f18502459d868aa2ec3a5 /net/9p/client.c | |
| parent | 9p: Fix comment on smp_wmb (diff) | |
| download | linux-b5303be2bee3c8b29de3f7f4ea8ae00c4e816760.tar.xz linux-b5303be2bee3c8b29de3f7f4ea8ae00c4e816760.zip | |
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/client.c')
| -rw-r--r-- | net/9p/client.c | 23 |
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, |