The patch titled
ipc/mqueue.c: fix mq_open() return value
has been removed from the -mm tree. Its filename was
ipc-mqueue-fix-mq_open-return-value.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: ipc/mqueue.c: fix mq_open() return value
From: Jiri Slaby <jslaby@xxxxxxx>
We return ENOMEM from mqueue_get_inode even when we have enough memory.
Namely in case the system rlimit of mqueue was reached. This error
propagates to mq_queue and user sees the error unexpectedly. So fix this
up to properly return EMFILE as described in the manpage:
EMFILE The process already has the maximum number of files and
message queues open.
instead of:
ENOMEM Insufficient memory.
With the previous patch we just switch to ERR_PTR/PTR_ERR/IS_ERR error
handling here.
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
Cc: Manfred Spraul <manfred@xxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
ipc/mqueue.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff -puN ipc/mqueue.c~ipc-mqueue-fix-mq_open-return-value ipc/mqueue.c
--- a/ipc/mqueue.c~ipc-mqueue-fix-mq_open-return-value
+++ a/ipc/mqueue.c
@@ -113,6 +113,7 @@ static struct inode *mqueue_get_inode(st
{
struct user_struct *u = current_user();
struct inode *inode;
+ int ret = -ENOMEM;
inode = new_inode(sb);
if (!inode)
@@ -160,6 +161,7 @@ static struct inode *mqueue_get_inode(st
u->mq_bytes + mq_bytes > task_rlimit(p, RLIMIT_MSGQUEUE)) {
spin_unlock(&mq_lock);
/* mqueue_evict_inode() releases info->messages */
+ ret = -EMFILE;
goto out_inode;
}
u->mq_bytes += mq_bytes;
@@ -179,7 +181,7 @@ static struct inode *mqueue_get_inode(st
out_inode:
iput(inode);
err:
- return NULL;
+ return ERR_PTR(ret);
}
static int mqueue_fill_super(struct super_block *sb, void *data, int silent)
@@ -195,8 +197,8 @@ static int mqueue_fill_super(struct supe
inode = mqueue_get_inode(sb, ns, S_IFDIR | S_ISVTX | S_IRWXUGO,
NULL);
- if (!inode) {
- error = -ENOMEM;
+ if (IS_ERR(inode)) {
+ error = PTR_ERR(inode);
goto out;
}
@@ -316,8 +318,8 @@ static int mqueue_create(struct inode *d
spin_unlock(&mq_lock);
inode = mqueue_get_inode(dir->i_sb, ipc_ns, mode, attr);
- if (!inode) {
- error = -ENOMEM;
+ if (IS_ERR(inode)) {
+ error = PTR_ERR(inode);
spin_lock(&mq_lock);
ipc_ns->mq_queues_count--;
goto out_unlock;
_
Patches currently in -mm which might be from jslaby@xxxxxxx are
origin.patch
linux-next.patch
leds-route-kbd-leds-through-the-generic-leds-layer.patch
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