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-rw-r--r--fs/notify/Kconfig2
-rw-r--r--fs/notify/fanotify/fanotify.c11
-rw-r--r--fs/notify/fanotify/fanotify_user.c36
-rw-r--r--fs/notify/fsnotify.c80
-rw-r--r--fs/notify/inotify/inotify_fsnotify.c12
-rw-r--r--fs/notify/inotify/inotify_user.c1
-rw-r--r--fs/notify/notification.c33
7 files changed, 97 insertions, 78 deletions
diff --git a/fs/notify/Kconfig b/fs/notify/Kconfig
index 22c629e..b388443 100644
--- a/fs/notify/Kconfig
+++ b/fs/notify/Kconfig
@@ -3,4 +3,4 @@ config FSNOTIFY
source "fs/notify/dnotify/Kconfig"
source "fs/notify/inotify/Kconfig"
-source "fs/notify/fanotify/Kconfig"
+#source "fs/notify/fanotify/Kconfig"
diff --git a/fs/notify/fanotify/fanotify.c b/fs/notify/fanotify/fanotify.c
index eb8f73c..85366c7 100644
--- a/fs/notify/fanotify/fanotify.c
+++ b/fs/notify/fanotify/fanotify.c
@@ -17,9 +17,9 @@ static bool should_merge(struct fsnotify_event *old, struct fsnotify_event *new)
old->data_type == new->data_type &&
old->tgid == new->tgid) {
switch (old->data_type) {
- case (FSNOTIFY_EVENT_FILE):
- if ((old->file->f_path.mnt == new->file->f_path.mnt) &&
- (old->file->f_path.dentry == new->file->f_path.dentry))
+ case (FSNOTIFY_EVENT_PATH):
+ if ((old->path.mnt == new->path.mnt) &&
+ (old->path.dentry == new->path.dentry))
return true;
case (FSNOTIFY_EVENT_NONE):
return true;
@@ -165,16 +165,13 @@ static bool fanotify_should_send_event(struct fsnotify_group *group,
"mask=%x data=%p data_type=%d\n", __func__, group, to_tell,
inode_mark, vfsmnt_mark, event_mask, data, data_type);
- pr_debug("%s: group=%p vfsmount_mark=%p inode_mark=%p mask=%x\n",
- __func__, group, vfsmnt_mark, inode_mark, event_mask);
-
/* sorry, fanotify only gives a damn about files and dirs */
if (!S_ISREG(to_tell->i_mode) &&
!S_ISDIR(to_tell->i_mode))
return false;
/* if we don't have enough info to send an event to userspace say no */
- if (data_type != FSNOTIFY_EVENT_FILE)
+ if (data_type != FSNOTIFY_EVENT_PATH)
return false;
if (inode_mark && vfsmnt_mark) {
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
index 25a3b4d..bbcb98e 100644
--- a/fs/notify/fanotify/fanotify_user.c
+++ b/fs/notify/fanotify/fanotify_user.c
@@ -65,7 +65,7 @@ static int create_fd(struct fsnotify_group *group, struct fsnotify_event *event)
if (client_fd < 0)
return client_fd;
- if (event->data_type != FSNOTIFY_EVENT_FILE) {
+ if (event->data_type != FSNOTIFY_EVENT_PATH) {
WARN_ON(1);
put_unused_fd(client_fd);
return -EINVAL;
@@ -75,8 +75,8 @@ static int create_fd(struct fsnotify_group *group, struct fsnotify_event *event)
* we need a new file handle for the userspace program so it can read even if it was
* originally opened O_WRONLY.
*/
- dentry = dget(event->file->f_path.dentry);
- mnt = mntget(event->file->f_path.mnt);
+ dentry = dget(event->path.dentry);
+ mnt = mntget(event->path.mnt);
/* it's possible this event was an overflow event. in that case dentry and mnt
* are NULL; That's fine, just don't call dentry open */
if (dentry && mnt)
@@ -195,6 +195,14 @@ static int prepare_for_access_response(struct fsnotify_group *group,
re->fd = fd;
mutex_lock(&group->fanotify_data.access_mutex);
+
+ if (group->fanotify_data.bypass_perm) {
+ mutex_unlock(&group->fanotify_data.access_mutex);
+ kmem_cache_free(fanotify_response_event_cache, re);
+ event->response = FAN_ALLOW;
+ return 0;
+ }
+
list_add_tail(&re->list, &group->fanotify_data.access_list);
mutex_unlock(&group->fanotify_data.access_mutex);
@@ -364,9 +372,28 @@ static ssize_t fanotify_write(struct file *file, const char __user *buf, size_t
static int fanotify_release(struct inode *ignored, struct file *file)
{
struct fsnotify_group *group = file->private_data;
+ struct fanotify_response_event *re, *lre;
pr_debug("%s: file=%p group=%p\n", __func__, file, group);
+#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS
+ mutex_lock(&group->fanotify_data.access_mutex);
+
+ group->fanotify_data.bypass_perm = true;
+
+ list_for_each_entry_safe(re, lre, &group->fanotify_data.access_list, list) {
+ pr_debug("%s: found group=%p re=%p event=%p\n", __func__, group,
+ re, re->event);
+
+ list_del_init(&re->list);
+ re->event->response = FAN_ALLOW;
+
+ kmem_cache_free(fanotify_response_event_cache, re);
+ }
+ mutex_unlock(&group->fanotify_data.access_mutex);
+
+ wake_up(&group->fanotify_data.access_waitq);
+#endif
/* matches the fanotify_init->fsnotify_alloc_group */
fsnotify_put_group(group);
@@ -406,6 +433,7 @@ static const struct file_operations fanotify_fops = {
.release = fanotify_release,
.unlocked_ioctl = fanotify_ioctl,
.compat_ioctl = fanotify_ioctl,
+ .llseek = noop_llseek,
};
static void fanotify_free_mark(struct fsnotify_mark *fsn_mark)
@@ -614,7 +642,7 @@ SYSCALL_DEFINE2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags)
__func__, flags, event_f_flags);
if (!capable(CAP_SYS_ADMIN))
- return -EACCES;
+ return -EPERM;
if (flags & ~FAN_ALL_INIT_FLAGS)
return -EINVAL;
diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index 4d2a82c..3680242 100644
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -84,7 +84,7 @@ void __fsnotify_update_child_dentry_flags(struct inode *inode)
}
/* Notify this dentry's parent about a child's events. */
-void __fsnotify_parent(struct file *file, struct dentry *dentry, __u32 mask)
+void __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask)
{
struct dentry *parent;
struct inode *p_inode;
@@ -92,7 +92,7 @@ void __fsnotify_parent(struct file *file, struct dentry *dentry, __u32 mask)
bool should_update_children = false;
if (!dentry)
- dentry = file->f_path.dentry;
+ dentry = path->dentry;
if (!(dentry->d_flags & DCACHE_FSNOTIFY_PARENT_WATCHED))
return;
@@ -124,8 +124,8 @@ void __fsnotify_parent(struct file *file, struct dentry *dentry, __u32 mask)
* specifies these are events which came from a child. */
mask |= FS_EVENT_ON_CHILD;
- if (file)
- fsnotify(p_inode, mask, file, FSNOTIFY_EVENT_FILE,
+ if (path)
+ fsnotify(p_inode, mask, path, FSNOTIFY_EVENT_PATH,
dentry->d_name.name, 0);
else
fsnotify(p_inode, mask, dentry->d_inode, FSNOTIFY_EVENT_INODE,
@@ -148,13 +148,14 @@ static int send_to_group(struct inode *to_tell, struct vfsmount *mnt,
const unsigned char *file_name,
struct fsnotify_event **event)
{
- struct fsnotify_group *group = inode_mark->group;
- __u32 inode_test_mask = (mask & ~FS_EVENT_ON_CHILD);
- __u32 vfsmount_test_mask = (mask & ~FS_EVENT_ON_CHILD);
+ struct fsnotify_group *group = NULL;
+ __u32 inode_test_mask = 0;
+ __u32 vfsmount_test_mask = 0;
- pr_debug("%s: group=%p to_tell=%p mnt=%p mark=%p mask=%x data=%p"
- " data_is=%d cookie=%d event=%p\n", __func__, group, to_tell,
- mnt, inode_mark, mask, data, data_is, cookie, *event);
+ if (unlikely(!inode_mark && !vfsmount_mark)) {
+ BUG();
+ return 0;
+ }
/* clear ignored on inode modification */
if (mask & FS_MODIFY) {
@@ -168,18 +169,29 @@ static int send_to_group(struct inode *to_tell, struct vfsmount *mnt,
/* does the inode mark tell us to do something? */
if (inode_mark) {
+ group = inode_mark->group;
+ inode_test_mask = (mask & ~FS_EVENT_ON_CHILD);
inode_test_mask &= inode_mark->mask;
inode_test_mask &= ~inode_mark->ignored_mask;
}
/* does the vfsmount_mark tell us to do something? */
if (vfsmount_mark) {
+ vfsmount_test_mask = (mask & ~FS_EVENT_ON_CHILD);
+ group = vfsmount_mark->group;
vfsmount_test_mask &= vfsmount_mark->mask;
vfsmount_test_mask &= ~vfsmount_mark->ignored_mask;
if (inode_mark)
vfsmount_test_mask &= ~inode_mark->ignored_mask;
}
+ pr_debug("%s: group=%p to_tell=%p mnt=%p mask=%x inode_mark=%p"
+ " inode_test_mask=%x vfsmount_mark=%p vfsmount_test_mask=%x"
+ " data=%p data_is=%d cookie=%d event=%p\n",
+ __func__, group, to_tell, mnt, mask, inode_mark,
+ inode_test_mask, vfsmount_mark, vfsmount_test_mask, data,
+ data_is, cookie, *event);
+
if (!inode_test_mask && !vfsmount_test_mask)
return 0;
@@ -207,18 +219,17 @@ static int send_to_group(struct inode *to_tell, struct vfsmount *mnt,
int fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is,
const unsigned char *file_name, u32 cookie)
{
- struct hlist_node *inode_node, *vfsmount_node;
+ struct hlist_node *inode_node = NULL, *vfsmount_node = NULL;
struct fsnotify_mark *inode_mark = NULL, *vfsmount_mark = NULL;
struct fsnotify_group *inode_group, *vfsmount_group;
struct fsnotify_event *event = NULL;
struct vfsmount *mnt;
int idx, ret = 0;
- bool used_inode = false, used_vfsmount = false;
/* global tests shouldn't care about events on child only the specific event */
__u32 test_mask = (mask & ~FS_EVENT_ON_CHILD);
- if (data_is == FSNOTIFY_EVENT_FILE)
- mnt = ((struct file *)data)->f_path.mnt;
+ if (data_is == FSNOTIFY_EVENT_PATH)
+ mnt = ((struct path *)data)->mnt;
else
mnt = NULL;
@@ -238,57 +249,50 @@ int fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is,
(test_mask & to_tell->i_fsnotify_mask))
inode_node = srcu_dereference(to_tell->i_fsnotify_marks.first,
&fsnotify_mark_srcu);
- else
- inode_node = NULL;
- if (mnt) {
- if ((mask & FS_MODIFY) ||
- (test_mask & mnt->mnt_fsnotify_mask))
- vfsmount_node = srcu_dereference(mnt->mnt_fsnotify_marks.first,
- &fsnotify_mark_srcu);
- else
- vfsmount_node = NULL;
- } else {
- mnt = NULL;
- vfsmount_node = NULL;
+ if (mnt && ((mask & FS_MODIFY) ||
+ (test_mask & mnt->mnt_fsnotify_mask))) {
+ vfsmount_node = srcu_dereference(mnt->mnt_fsnotify_marks.first,
+ &fsnotify_mark_srcu);
+ inode_node = srcu_dereference(to_tell->i_fsnotify_marks.first,
+ &fsnotify_mark_srcu);
}
while (inode_node || vfsmount_node) {
+ inode_group = vfsmount_group = NULL;
+
if (inode_node) {
inode_mark = hlist_entry(srcu_dereference(inode_node, &fsnotify_mark_srcu),
struct fsnotify_mark, i.i_list);
inode_group = inode_mark->group;
- } else
- inode_group = (void *)-1;
+ }
if (vfsmount_node) {
vfsmount_mark = hlist_entry(srcu_dereference(vfsmount_node, &fsnotify_mark_srcu),
struct fsnotify_mark, m.m_list);
vfsmount_group = vfsmount_mark->group;
- } else
- vfsmount_group = (void *)-1;
+ }
- if (inode_group < vfsmount_group) {
+ if (inode_group > vfsmount_group) {
/* handle inode */
send_to_group(to_tell, NULL, inode_mark, NULL, mask, data,
data_is, cookie, file_name, &event);
- used_inode = true;
- } else if (vfsmount_group < inode_group) {
+ /* we didn't use the vfsmount_mark */
+ vfsmount_group = NULL;
+ } else if (vfsmount_group > inode_group) {
send_to_group(to_tell, mnt, NULL, vfsmount_mark, mask, data,
data_is, cookie, file_name, &event);
- used_vfsmount = true;
+ inode_group = NULL;
} else {
send_to_group(to_tell, mnt, inode_mark, vfsmount_mark,
mask, data, data_is, cookie, file_name,
&event);
- used_vfsmount = true;
- used_inode = true;
}
- if (used_inode)
+ if (inode_group)
inode_node = srcu_dereference(inode_node->next,
&fsnotify_mark_srcu);
- if (used_vfsmount)
+ if (vfsmount_group)
vfsmount_node = srcu_dereference(vfsmount_node->next,
&fsnotify_mark_srcu);
}
diff --git a/fs/notify/inotify/inotify_fsnotify.c b/fs/notify/inotify/inotify_fsnotify.c
index 5e73eeb..a91b69a 100644
--- a/fs/notify/inotify/inotify_fsnotify.c
+++ b/fs/notify/inotify/inotify_fsnotify.c
@@ -52,9 +52,9 @@ static bool event_compare(struct fsnotify_event *old, struct fsnotify_event *new
!strcmp(old->file_name, new->file_name))
return true;
break;
- case (FSNOTIFY_EVENT_FILE):
- if ((old->file->f_path.mnt == new->file->f_path.mnt) &&
- (old->file->f_path.dentry == new->file->f_path.dentry))
+ case (FSNOTIFY_EVENT_PATH):
+ if ((old->path.mnt == new->path.mnt) &&
+ (old->path.dentry == new->path.dentry))
return true;
break;
case (FSNOTIFY_EVENT_NONE):
@@ -147,10 +147,10 @@ static bool inotify_should_send_event(struct fsnotify_group *group, struct inode
__u32 mask, void *data, int data_type)
{
if ((inode_mark->mask & FS_EXCL_UNLINK) &&
- (data_type == FSNOTIFY_EVENT_FILE)) {
- struct file *file = data;
+ (data_type == FSNOTIFY_EVENT_PATH)) {
+ struct path *path = data;
- if (d_unlinked(file->f_path.dentry))
+ if (d_unlinked(path->dentry))
return false;
}
diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c
index bf7f6d7..24edc11 100644
--- a/fs/notify/inotify/inotify_user.c
+++ b/fs/notify/inotify/inotify_user.c
@@ -344,6 +344,7 @@ static const struct file_operations inotify_fops = {
.release = inotify_release,
.unlocked_ioctl = inotify_ioctl,
.compat_ioctl = inotify_ioctl,
+ .llseek = noop_llseek,
};
diff --git a/fs/notify/notification.c b/fs/notify/notification.c
index d6c435a..f39260f 100644
--- a/fs/notify/notification.c
+++ b/fs/notify/notification.c
@@ -31,7 +31,6 @@
* allocated and used.
*/
-#include <linux/file.h>
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/kernel.h>
@@ -90,8 +89,8 @@ void fsnotify_put_event(struct fsnotify_event *event)
if (atomic_dec_and_test(&event->refcnt)) {
pr_debug("%s: event=%p\n", __func__, event);
- if (event->data_type == FSNOTIFY_EVENT_FILE)
- fput(event->file);
+ if (event->data_type == FSNOTIFY_EVENT_PATH)
+ path_put(&event->path);
BUG_ON(!list_empty(&event->private_data_list));
@@ -376,8 +375,8 @@ struct fsnotify_event *fsnotify_clone_event(struct fsnotify_event *old_event)
}
}
event->tgid = get_pid(old_event->tgid);
- if (event->data_type == FSNOTIFY_EVENT_FILE)
- get_file(event->file);
+ if (event->data_type == FSNOTIFY_EVENT_PATH)
+ path_get(&event->path);
return event;
}
@@ -424,22 +423,11 @@ struct fsnotify_event *fsnotify_create_event(struct inode *to_tell, __u32 mask,
event->data_type = data_type;
switch (data_type) {
- case FSNOTIFY_EVENT_FILE: {
- event->file = data;
- /*
- * if this file is about to disappear hold an extra reference
- * until we return to __fput so we don't have to worry about
- * future get/put destroying the file under us or generating
- * additional events. Notice that we change f_mode without
- * holding f_lock. This is safe since this is the only possible
- * reference to this object in the kernel (it was about to be
- * freed, remember?)
- */
- if (!atomic_long_read(&event->file->f_count)) {
- event->file->f_mode |= FMODE_NONOTIFY;
- get_file(event->file);
- }
- get_file(event->file);
+ case FSNOTIFY_EVENT_PATH: {
+ struct path *path = data;
+ event->path.dentry = path->dentry;
+ event->path.mnt = path->mnt;
+ path_get(&event->path);
break;
}
case FSNOTIFY_EVENT_INODE:
@@ -447,7 +435,8 @@ struct fsnotify_event *fsnotify_create_event(struct inode *to_tell, __u32 mask,
break;
case FSNOTIFY_EVENT_NONE:
event->inode = NULL;
- event->file = NULL;
+ event->path.dentry = NULL;
+ event->path.mnt = NULL;
break;
default:
BUG();
generated by cgit v1.1 at 2024-09-01 14:04:07 +0000