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path: root/fs/notify/fanotify/fanotify_user.c
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Diffstat (limited to 'fs/notify/fanotify/fanotify_user.c')
-rw-r--r--fs/notify/fanotify/fanotify_user.c90
1 files changed, 36 insertions, 54 deletions
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
index f0e7a57bc89..9ff4a5ee6e2 100644
--- a/fs/notify/fanotify/fanotify_user.c
+++ b/fs/notify/fanotify/fanotify_user.c
@@ -17,6 +17,7 @@
#include <asm/ioctls.h>
#include "../../mount.h"
+#include "../fdinfo.h"
#define FANOTIFY_DEFAULT_MAX_EVENTS 16384
#define FANOTIFY_DEFAULT_MAX_MARKS 8192
@@ -58,7 +59,9 @@ static struct fsnotify_event *get_one_event(struct fsnotify_group *group,
return fsnotify_remove_notify_event(group);
}
-static int create_fd(struct fsnotify_group *group, struct fsnotify_event *event)
+static int create_fd(struct fsnotify_group *group,
+ struct fsnotify_event *event,
+ struct file **file)
{
int client_fd;
struct file *new_file;
@@ -98,7 +101,7 @@ static int create_fd(struct fsnotify_group *group, struct fsnotify_event *event)
put_unused_fd(client_fd);
client_fd = PTR_ERR(new_file);
} else {
- fd_install(client_fd, new_file);
+ *file = new_file;
}
return client_fd;
@@ -106,13 +109,15 @@ static int create_fd(struct fsnotify_group *group, struct fsnotify_event *event)
static int fill_event_metadata(struct fsnotify_group *group,
struct fanotify_event_metadata *metadata,
- struct fsnotify_event *event)
+ struct fsnotify_event *event,
+ struct file **file)
{
int ret = 0;
pr_debug("%s: group=%p metadata=%p event=%p\n", __func__,
group, metadata, event);
+ *file = NULL;
metadata->event_len = FAN_EVENT_METADATA_LEN;
metadata->metadata_len = FAN_EVENT_METADATA_LEN;
metadata->vers = FANOTIFY_METADATA_VERSION;
@@ -121,7 +126,7 @@ static int fill_event_metadata(struct fsnotify_group *group,
if (unlikely(event->mask & FAN_Q_OVERFLOW))
metadata->fd = FAN_NOFD;
else {
- metadata->fd = create_fd(group, event);
+ metadata->fd = create_fd(group, event, file);
if (metadata->fd < 0)
ret = metadata->fd;
}
@@ -220,25 +225,6 @@ static int prepare_for_access_response(struct fsnotify_group *group,
return 0;
}
-static void remove_access_response(struct fsnotify_group *group,
- struct fsnotify_event *event,
- __s32 fd)
-{
- struct fanotify_response_event *re;
-
- if (!(event->mask & FAN_ALL_PERM_EVENTS))
- return;
-
- re = dequeue_re(group, fd);
- if (!re)
- return;
-
- BUG_ON(re->event != event);
-
- kmem_cache_free(fanotify_response_event_cache, re);
-
- return;
-}
#else
static int prepare_for_access_response(struct fsnotify_group *group,
struct fsnotify_event *event,
@@ -247,12 +233,6 @@ static int prepare_for_access_response(struct fsnotify_group *group,
return 0;
}
-static void remove_access_response(struct fsnotify_group *group,
- struct fsnotify_event *event,
- __s32 fd)
-{
- return;
-}
#endif
static ssize_t copy_event_to_user(struct fsnotify_group *group,
@@ -260,31 +240,34 @@ static ssize_t copy_event_to_user(struct fsnotify_group *group,
char __user *buf)
{
struct fanotify_event_metadata fanotify_event_metadata;
+ struct file *f;
int fd, ret;
pr_debug("%s: group=%p event=%p\n", __func__, group, event);
- ret = fill_event_metadata(group, &fanotify_event_metadata, event);
+ ret = fill_event_metadata(group, &fanotify_event_metadata, event, &f);
if (ret < 0)
goto out;
fd = fanotify_event_metadata.fd;
- ret = prepare_for_access_response(group, event, fd);
- if (ret)
- goto out_close_fd;
-
ret = -EFAULT;
if (copy_to_user(buf, &fanotify_event_metadata,
fanotify_event_metadata.event_len))
- goto out_kill_access_response;
+ goto out_close_fd;
+ ret = prepare_for_access_response(group, event, fd);
+ if (ret)
+ goto out_close_fd;
+
+ if (fd != FAN_NOFD)
+ fd_install(fd, f);
return fanotify_event_metadata.event_len;
-out_kill_access_response:
- remove_access_response(group, event, fd);
out_close_fd:
- if (fd != FAN_NOFD)
- sys_close(fd);
+ if (fd != FAN_NOFD) {
+ put_unused_fd(fd);
+ fput(f);
+ }
out:
#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS
if (event->mask & FAN_ALL_PERM_EVENTS) {
@@ -450,6 +433,7 @@ static long fanotify_ioctl(struct file *file, unsigned int cmd, unsigned long ar
}
static const struct file_operations fanotify_fops = {
+ .show_fdinfo = fanotify_show_fdinfo,
.poll = fanotify_poll,
.read = fanotify_read,
.write = fanotify_write,
@@ -474,24 +458,22 @@ static int fanotify_find_path(int dfd, const char __user *filename,
dfd, filename, flags);
if (filename == NULL) {
- struct file *file;
- int fput_needed;
+ struct fd f = fdget(dfd);
ret = -EBADF;
- file = fget_light(dfd, &fput_needed);
- if (!file)
+ if (!f.file)
goto out;
ret = -ENOTDIR;
if ((flags & FAN_MARK_ONLYDIR) &&
- !(S_ISDIR(file->f_path.dentry->d_inode->i_mode))) {
- fput_light(file, fput_needed);
+ !(S_ISDIR(f.file->f_path.dentry->d_inode->i_mode))) {
+ fdput(f);
goto out;
}
- *path = file->f_path;
+ *path = f.file->f_path;
path_get(path);
- fput_light(file, fput_needed);
+ fdput(f);
} else {
unsigned int lookup_flags = 0;
@@ -780,9 +762,9 @@ SYSCALL_DEFINE(fanotify_mark)(int fanotify_fd, unsigned int flags,
struct inode *inode = NULL;
struct vfsmount *mnt = NULL;
struct fsnotify_group *group;
- struct file *filp;
+ struct fd f;
struct path path;
- int ret, fput_needed;
+ int ret;
pr_debug("%s: fanotify_fd=%d flags=%x dfd=%d pathname=%p mask=%llx\n",
__func__, fanotify_fd, flags, dfd, pathname, mask);
@@ -816,15 +798,15 @@ SYSCALL_DEFINE(fanotify_mark)(int fanotify_fd, unsigned int flags,
#endif
return -EINVAL;
- filp = fget_light(fanotify_fd, &fput_needed);
- if (unlikely(!filp))
+ f = fdget(fanotify_fd);
+ if (unlikely(!f.file))
return -EBADF;
/* verify that this is indeed an fanotify instance */
ret = -EINVAL;
- if (unlikely(filp->f_op != &fanotify_fops))
+ if (unlikely(f.file->f_op != &fanotify_fops))
goto fput_and_out;
- group = filp->private_data;
+ group = f.file->private_data;
/*
* group->priority == FS_PRIO_0 == FAN_CLASS_NOTIF. These are not
@@ -871,7 +853,7 @@ SYSCALL_DEFINE(fanotify_mark)(int fanotify_fd, unsigned int flags,
path_put(&path);
fput_and_out:
- fput_light(filp, fput_needed);
+ fdput(f);
return ret;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-28 13:19:02 +0000