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authorAmir Goldstein <amir73il@gmail.com>2020-03-19 17:10:12 +0200
committerJan Kara <jack@suse.cz>2020-03-23 18:19:06 +0100
commitaa93bdc5500cc93ba31afeda1a61610d117947ad (patch)
treeea5f38b9d49a9e1b30fd02fb1f1a84c393e907e2 /fs/notify
parenta1aae0570a2b806937120921db2c5d3100ca55fc (diff)
downloadlinux-aa93bdc5500cc93ba31afeda1a61610d117947ad.tar.bz2
fsnotify: use helpers to access data by data_type
Create helpers to access path and inode from different data types. Link: https://lore.kernel.org/r/20200319151022.31456-5-amir73il@gmail.com Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/notify')
-rw-r--r--fs/notify/fanotify/fanotify.c18
-rw-r--r--fs/notify/fsnotify.c5
-rw-r--r--fs/notify/inotify/inotify_fsnotify.c8
3 files changed, 14 insertions, 17 deletions
diff --git a/fs/notify/fanotify/fanotify.c b/fs/notify/fanotify/fanotify.c
index 5778d1347b35..19ec7a4f4d50 100644
--- a/fs/notify/fanotify/fanotify.c
+++ b/fs/notify/fanotify/fanotify.c
@@ -151,7 +151,7 @@ static u32 fanotify_group_event_mask(struct fsnotify_group *group,
{
__u32 marks_mask = 0, marks_ignored_mask = 0;
__u32 test_mask, user_mask = FANOTIFY_OUTGOING_EVENTS;
- const struct path *path = data;
+ const struct path *path = fsnotify_data_path(data, data_type);
struct fsnotify_mark *mark;
int type;
@@ -160,7 +160,7 @@ static u32 fanotify_group_event_mask(struct fsnotify_group *group,
if (!FAN_GROUP_FLAG(group, FAN_REPORT_FID)) {
/* Do we have path to open a file descriptor? */
- if (data_type != FSNOTIFY_EVENT_PATH)
+ if (!path)
return 0;
/* Path type events are only relevant for files and dirs */
if (!d_is_reg(path->dentry) && !d_can_lookup(path->dentry))
@@ -269,11 +269,8 @@ static struct inode *fanotify_fid_inode(struct inode *to_tell, u32 event_mask,
{
if (event_mask & ALL_FSNOTIFY_DIRENT_EVENTS)
return to_tell;
- else if (data_type == FSNOTIFY_EVENT_INODE)
- return (struct inode *)data;
- else if (data_type == FSNOTIFY_EVENT_PATH)
- return d_inode(((struct path *)data)->dentry);
- return NULL;
+
+ return (struct inode *)fsnotify_data_inode(data, data_type);
}
struct fanotify_event *fanotify_alloc_event(struct fsnotify_group *group,
@@ -284,6 +281,7 @@ struct fanotify_event *fanotify_alloc_event(struct fsnotify_group *group,
struct fanotify_event *event = NULL;
gfp_t gfp = GFP_KERNEL_ACCOUNT;
struct inode *id = fanotify_fid_inode(inode, mask, data, data_type);
+ const struct path *path = fsnotify_data_path(data, data_type);
/*
* For queues with unlimited length lost events are not expected and
@@ -324,10 +322,10 @@ init: __maybe_unused
if (id && FAN_GROUP_FLAG(group, FAN_REPORT_FID)) {
/* Report the event without a file identifier on encode error */
event->fh_type = fanotify_encode_fid(event, id, gfp, fsid);
- } else if (data_type == FSNOTIFY_EVENT_PATH) {
+ } else if (path) {
event->fh_type = FILEID_ROOT;
- event->path = *((struct path *)data);
- path_get(&event->path);
+ event->path = *path;
+ path_get(path);
} else {
event->fh_type = FILEID_INVALID;
event->path.mnt = NULL;
diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index 46f225580009..a5d6467f89a0 100644
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -318,6 +318,7 @@ static void fsnotify_iter_next(struct fsnotify_iter_info *iter_info)
int fsnotify(struct inode *to_tell, __u32 mask, const void *data, int data_is,
const struct qstr *file_name, u32 cookie)
{
+ const struct path *path = fsnotify_data_path(data, data_is);
struct fsnotify_iter_info iter_info = {};
struct super_block *sb = to_tell->i_sb;
struct mount *mnt = NULL;
@@ -325,8 +326,8 @@ int fsnotify(struct inode *to_tell, __u32 mask, const void *data, int data_is,
int ret = 0;
__u32 test_mask = (mask & ALL_FSNOTIFY_EVENTS);
- if (data_is == FSNOTIFY_EVENT_PATH) {
- mnt = real_mount(((const struct path *)data)->mnt);
+ if (path) {
+ mnt = real_mount(path->mnt);
mnt_or_sb_mask |= mnt->mnt_fsnotify_mask;
}
/* An event "on child" is not intended for a mount/sb mark */
diff --git a/fs/notify/inotify/inotify_fsnotify.c b/fs/notify/inotify/inotify_fsnotify.c
index d510223d302c..6bb98522bbfd 100644
--- a/fs/notify/inotify/inotify_fsnotify.c
+++ b/fs/notify/inotify/inotify_fsnotify.c
@@ -61,6 +61,7 @@ int inotify_handle_event(struct fsnotify_group *group,
const struct qstr *file_name, u32 cookie,
struct fsnotify_iter_info *iter_info)
{
+ const struct path *path = fsnotify_data_path(data, data_type);
struct fsnotify_mark *inode_mark = fsnotify_iter_inode_mark(iter_info);
struct inotify_inode_mark *i_mark;
struct inotify_event_info *event;
@@ -73,12 +74,9 @@ int inotify_handle_event(struct fsnotify_group *group,
return 0;
if ((inode_mark->mask & FS_EXCL_UNLINK) &&
- (data_type == FSNOTIFY_EVENT_PATH)) {
- const struct path *path = data;
+ path && d_unlinked(path->dentry))
+ return 0;
- if (d_unlinked(path->dentry))
- return 0;
- }
if (file_name) {
len = file_name->len;
alloc_len += len + 1;