From b5303be2bee3c8b29de3f7f4ea8ae00c4e816760 Mon Sep 17 00:00:00 2001 From: Matthew Wilcox Date: Wed, 11 Jul 2018 14:02:21 -0700 Subject: 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 Reviewed-by: Jun Piao Reviewed-by: Greg Kurz Reviewed-by: Yiwen Jiang Cc: Eric Van Hensbergen Cc: Ron Minnich Cc: Latchesar Ionkov Signed-off-by: Dominique Martinet --- net/9p/client.c | 23 +++++++++-------------- 1 file changed, 9 insertions(+), 14 deletions(-) (limited to 'net/9p') 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, -- cgit v1.2.3-58-ga151