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authorLinus Torvalds <torvalds@linux-foundation.org>2018-04-05 19:17:50 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-04-05 19:17:50 -0700
commitbe88751f320a716a4327596adfe834e162c14532 (patch)
tree4015f6d1da204e6228dfcbc3984ac9ddf7d988de /fs/notify/inotify
parent5e4d659713f52c1c9dfc2fea9d319b80a53d4bc9 (diff)
parentb91ed9d8082c394dda63f94f935219cd0a565938 (diff)
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull misc filesystem updates from Jan Kara: "udf, ext2, quota, fsnotify fixes & cleanups: - udf fixes for handling of media without uid/gid - udf fixes for some corner cases in parsing of volume recognition sequence - improvements of fsnotify handling of ENOMEM - new ioctl to allow setting of watch descriptor id for inotify (for checkpoint - restart) - small ext2, reiserfs, quota cleanups" * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs: quota: Kill an unused extern entry form quota.h reiserfs: Remove VLA from fs/reiserfs/reiserfs.h udf: fix potential refcnt problem of nls module ext2: change return code to -ENOMEM when failing memory allocation udf: Do not mark possibly inconsistent filesystems as closed fsnotify: Let userspace know about lost events due to ENOMEM fanotify: Avoid lost events due to ENOMEM for unlimited queues udf: Remove never implemented mount options udf: Update mount option documentation udf: Provide saner default for invalid uid / gid udf: Clean up handling of invalid uid/gid udf: Apply uid/gid mount options also to new inodes & chown udf: Ignore [ug]id=ignore mount options udf: Fix handling of Partition Descriptors udf: Unify common handling of descriptors udf: Convert descriptor index definitions to enum udf: Allow volume descriptor sequence to be terminated by unrecorded block udf: Simplify handling of Volume Descriptor Pointers udf: Fix off-by-one in volume descriptor sequence length inotify: Extend ioctl to allow to request id of new watch descriptor
Diffstat (limited to 'fs/notify/inotify')
-rw-r--r--fs/notify/inotify/inotify_fsnotify.c8
-rw-r--r--fs/notify/inotify/inotify_user.c14
2 files changed, 21 insertions, 1 deletions
diff --git a/fs/notify/inotify/inotify_fsnotify.c b/fs/notify/inotify/inotify_fsnotify.c
index 8b73332735ba..40dedb37a1f3 100644
--- a/fs/notify/inotify/inotify_fsnotify.c
+++ b/fs/notify/inotify/inotify_fsnotify.c
@@ -99,8 +99,14 @@ int inotify_handle_event(struct fsnotify_group *group,
fsn_mark);
event = kmalloc(alloc_len, GFP_KERNEL);
- if (unlikely(!event))
+ if (unlikely(!event)) {
+ /*
+ * Treat lost event due to ENOMEM the same way as queue
+ * overflow to let userspace know event was lost.
+ */
+ fsnotify_queue_overflow(group);
return -ENOMEM;
+ }
fsn_event = &event->fse;
fsnotify_init_event(fsn_event, inode, mask);
diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c
index 43c23653ce2e..ef32f3657958 100644
--- a/fs/notify/inotify/inotify_user.c
+++ b/fs/notify/inotify/inotify_user.c
@@ -307,6 +307,20 @@ static long inotify_ioctl(struct file *file, unsigned int cmd,
spin_unlock(&group->notification_lock);
ret = put_user(send_len, (int __user *) p);
break;
+#ifdef CONFIG_CHECKPOINT_RESTORE
+ case INOTIFY_IOC_SETNEXTWD:
+ ret = -EINVAL;
+ if (arg >= 1 && arg <= INT_MAX) {
+ struct inotify_group_private_data *data;
+
+ data = &group->inotify_data;
+ spin_lock(&data->idr_lock);
+ idr_set_cursor(&data->idr, (unsigned int)arg);
+ spin_unlock(&data->idr_lock);
+ ret = 0;
+ }
+ break;
+#endif /* CONFIG_CHECKPOINT_RESTORE */
}
return ret;