From eaa2c6b0c9181c3c70f773361bd81d9efd5804d9 Mon Sep 17 00:00:00 2001 From: Amir Goldstein Date: Sat, 23 Jun 2018 17:54:51 +0300 Subject: fanotify: factor out helpers to add/remove mark Factor out helpers fanotify_add_mark() and fanotify_remove_mark() to reduce duplicated code. Signed-off-by: Amir Goldstein Signed-off-by: Jan Kara --- fs/notify/fanotify/fanotify_user.c | 86 +++++++++++++------------------------- 1 file changed, 29 insertions(+), 57 deletions(-) (limited to 'fs/notify/fanotify') diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c index 3899ad177651..d736a833fe39 100644 --- a/fs/notify/fanotify/fanotify_user.c +++ b/fs/notify/fanotify/fanotify_user.c @@ -524,17 +524,16 @@ static __u32 fanotify_mark_remove_from_mask(struct fsnotify_mark *fsn_mark, return mask & oldmask; } -static int fanotify_remove_vfsmount_mark(struct fsnotify_group *group, - struct vfsmount *mnt, __u32 mask, - unsigned int flags) +static int fanotify_remove_mark(struct fsnotify_group *group, + fsnotify_connp_t *connp, __u32 mask, + unsigned int flags) { struct fsnotify_mark *fsn_mark = NULL; __u32 removed; int destroy_mark; mutex_lock(&group->mark_mutex); - fsn_mark = fsnotify_find_mark(&real_mount(mnt)->mnt_fsnotify_marks, - group); + fsn_mark = fsnotify_find_mark(connp, group); if (!fsn_mark) { mutex_unlock(&group->mark_mutex); return -ENOENT; @@ -550,39 +549,25 @@ static int fanotify_remove_vfsmount_mark(struct fsnotify_group *group, if (destroy_mark) fsnotify_free_mark(fsn_mark); + /* matches the fsnotify_find_mark() */ fsnotify_put_mark(fsn_mark); return 0; } +static int fanotify_remove_vfsmount_mark(struct fsnotify_group *group, + struct vfsmount *mnt, __u32 mask, + unsigned int flags) +{ + return fanotify_remove_mark(group, &real_mount(mnt)->mnt_fsnotify_marks, + mask, flags); +} + static int fanotify_remove_inode_mark(struct fsnotify_group *group, struct inode *inode, __u32 mask, unsigned int flags) { - struct fsnotify_mark *fsn_mark = NULL; - __u32 removed; - int destroy_mark; - - mutex_lock(&group->mark_mutex); - fsn_mark = fsnotify_find_mark(&inode->i_fsnotify_marks, group); - if (!fsn_mark) { - mutex_unlock(&group->mark_mutex); - return -ENOENT; - } - - removed = fanotify_mark_remove_from_mask(fsn_mark, mask, flags, - &destroy_mark); - if (removed & fsnotify_conn_mask(fsn_mark->connector)) - fsnotify_recalc_mask(fsn_mark->connector); - if (destroy_mark) - fsnotify_detach_mark(fsn_mark); - mutex_unlock(&group->mark_mutex); - if (destroy_mark) - fsnotify_free_mark(fsn_mark); - - /* matches the fsnotify_find_mark() */ - fsnotify_put_mark(fsn_mark); - - return 0; + return fanotify_remove_mark(group, &inode->i_fsnotify_marks, mask, + flags); } static __u32 fanotify_mark_add_to_mask(struct fsnotify_mark *fsn_mark, @@ -639,19 +624,17 @@ static struct fsnotify_mark *fanotify_add_new_mark(struct fsnotify_group *group, } -static int fanotify_add_vfsmount_mark(struct fsnotify_group *group, - struct vfsmount *mnt, __u32 mask, - unsigned int flags) +static int fanotify_add_mark(struct fsnotify_group *group, + fsnotify_connp_t *connp, unsigned int type, + __u32 mask, unsigned int flags) { - fsnotify_connp_t *connp = &real_mount(mnt)->mnt_fsnotify_marks; struct fsnotify_mark *fsn_mark; __u32 added; mutex_lock(&group->mark_mutex); fsn_mark = fsnotify_find_mark(connp, group); if (!fsn_mark) { - fsn_mark = fanotify_add_new_mark(group, connp, - FSNOTIFY_OBJ_TYPE_VFSMOUNT); + fsn_mark = fanotify_add_new_mark(group, connp, type); if (IS_ERR(fsn_mark)) { mutex_unlock(&group->mark_mutex); return PTR_ERR(fsn_mark); @@ -666,14 +649,18 @@ static int fanotify_add_vfsmount_mark(struct fsnotify_group *group, return 0; } +static int fanotify_add_vfsmount_mark(struct fsnotify_group *group, + struct vfsmount *mnt, __u32 mask, + unsigned int flags) +{ + return fanotify_add_mark(group, &real_mount(mnt)->mnt_fsnotify_marks, + FSNOTIFY_OBJ_TYPE_VFSMOUNT, mask, flags); +} + static int fanotify_add_inode_mark(struct fsnotify_group *group, struct inode *inode, __u32 mask, unsigned int flags) { - fsnotify_connp_t *connp = &inode->i_fsnotify_marks; - struct fsnotify_mark *fsn_mark; - __u32 added; - pr_debug("%s: group=%p inode=%p\n", __func__, group, inode); /* @@ -686,23 +673,8 @@ static int fanotify_add_inode_mark(struct fsnotify_group *group, (atomic_read(&inode->i_writecount) > 0)) return 0; - mutex_lock(&group->mark_mutex); - fsn_mark = fsnotify_find_mark(connp, group); - if (!fsn_mark) { - fsn_mark = fanotify_add_new_mark(group, connp, - FSNOTIFY_OBJ_TYPE_INODE); - if (IS_ERR(fsn_mark)) { - mutex_unlock(&group->mark_mutex); - return PTR_ERR(fsn_mark); - } - } - added = fanotify_mark_add_to_mask(fsn_mark, mask, flags); - if (added & ~fsnotify_conn_mask(fsn_mark->connector)) - fsnotify_recalc_mask(fsn_mark->connector); - mutex_unlock(&group->mark_mutex); - - fsnotify_put_mark(fsn_mark); - return 0; + return fanotify_add_mark(group, &inode->i_fsnotify_marks, + FSNOTIFY_OBJ_TYPE_INODE, mask, flags); } /* fanotify syscalls */ -- cgit v1.2.3