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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/fs/notify
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/fs/notify')
-rw-r--r--ANDROID_3.4.5/fs/notify/Kconfig6
-rw-r--r--ANDROID_3.4.5/fs/notify/Makefile6
-rw-r--r--ANDROID_3.4.5/fs/notify/dnotify/Kconfig11
-rw-r--r--ANDROID_3.4.5/fs/notify/dnotify/Makefile1
-rw-r--r--ANDROID_3.4.5/fs/notify/dnotify/dnotify.c411
-rw-r--r--ANDROID_3.4.5/fs/notify/fanotify/Kconfig26
-rw-r--r--ANDROID_3.4.5/fs/notify/fanotify/Makefile1
-rw-r--r--ANDROID_3.4.5/fs/notify/fanotify/fanotify.c228
-rw-r--r--ANDROID_3.4.5/fs/notify/fanotify/fanotify_user.c893
-rw-r--r--ANDROID_3.4.5/fs/notify/fsnotify.c311
-rw-r--r--ANDROID_3.4.5/fs/notify/fsnotify.h47
-rw-r--r--ANDROID_3.4.5/fs/notify/group.c104
-rw-r--r--ANDROID_3.4.5/fs/notify/inode_mark.c315
-rw-r--r--ANDROID_3.4.5/fs/notify/inotify/Kconfig17
-rw-r--r--ANDROID_3.4.5/fs/notify/inotify/Makefile1
-rw-r--r--ANDROID_3.4.5/fs/notify/inotify/inotify.h21
-rw-r--r--ANDROID_3.4.5/fs/notify/inotify/inotify_fsnotify.c222
-rw-r--r--ANDROID_3.4.5/fs/notify/inotify/inotify_user.c867
-rw-r--r--ANDROID_3.4.5/fs/notify/mark.c372
-rw-r--r--ANDROID_3.4.5/fs/notify/notification.c463
-rw-r--r--ANDROID_3.4.5/fs/notify/vfsmount_mark.c195
21 files changed, 0 insertions, 4518 deletions
diff --git a/ANDROID_3.4.5/fs/notify/Kconfig b/ANDROID_3.4.5/fs/notify/Kconfig
deleted file mode 100644
index 22c629ee..00000000
--- a/ANDROID_3.4.5/fs/notify/Kconfig
+++ /dev/null
@@ -1,6 +0,0 @@
-config FSNOTIFY
- def_bool n
-
-source "fs/notify/dnotify/Kconfig"
-source "fs/notify/inotify/Kconfig"
-source "fs/notify/fanotify/Kconfig"
diff --git a/ANDROID_3.4.5/fs/notify/Makefile b/ANDROID_3.4.5/fs/notify/Makefile
deleted file mode 100644
index ae5f33a6..00000000
--- a/ANDROID_3.4.5/fs/notify/Makefile
+++ /dev/null
@@ -1,6 +0,0 @@
-obj-$(CONFIG_FSNOTIFY) += fsnotify.o notification.o group.o inode_mark.o \
- mark.o vfsmount_mark.o
-
-obj-y += dnotify/
-obj-y += inotify/
-obj-y += fanotify/
diff --git a/ANDROID_3.4.5/fs/notify/dnotify/Kconfig b/ANDROID_3.4.5/fs/notify/dnotify/Kconfig
deleted file mode 100644
index f9c1ca13..00000000
--- a/ANDROID_3.4.5/fs/notify/dnotify/Kconfig
+++ /dev/null
@@ -1,11 +0,0 @@
-config DNOTIFY
- bool "Dnotify support"
- select FSNOTIFY
- default y
- help
- Dnotify is a directory-based per-fd file change notification system
- that uses signals to communicate events to user-space. There exist
- superior alternatives, but some applications may still rely on
- dnotify.
-
- If unsure, say Y.
diff --git a/ANDROID_3.4.5/fs/notify/dnotify/Makefile b/ANDROID_3.4.5/fs/notify/dnotify/Makefile
deleted file mode 100644
index f145251d..00000000
--- a/ANDROID_3.4.5/fs/notify/dnotify/Makefile
+++ /dev/null
@@ -1 +0,0 @@
-obj-$(CONFIG_DNOTIFY) += dnotify.o
diff --git a/ANDROID_3.4.5/fs/notify/dnotify/dnotify.c b/ANDROID_3.4.5/fs/notify/dnotify/dnotify.c
deleted file mode 100644
index 3344bdd5..00000000
--- a/ANDROID_3.4.5/fs/notify/dnotify/dnotify.c
+++ /dev/null
@@ -1,411 +0,0 @@
-/*
- * Directory notifications for Linux.
- *
- * Copyright (C) 2000,2001,2002 Stephen Rothwell
- *
- * Copyright (C) 2009 Eric Paris <Red Hat Inc>
- * dnotify was largly rewritten to use the new fsnotify infrastructure
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2, or (at your option) any
- * later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- */
-#include <linux/fs.h>
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/dnotify.h>
-#include <linux/init.h>
-#include <linux/spinlock.h>
-#include <linux/slab.h>
-#include <linux/fdtable.h>
-#include <linux/fsnotify_backend.h>
-
-int dir_notify_enable __read_mostly = 1;
-
-static struct kmem_cache *dnotify_struct_cache __read_mostly;
-static struct kmem_cache *dnotify_mark_cache __read_mostly;
-static struct fsnotify_group *dnotify_group __read_mostly;
-static DEFINE_MUTEX(dnotify_mark_mutex);
-
-/*
- * dnotify will attach one of these to each inode (i_fsnotify_marks) which
- * is being watched by dnotify. If multiple userspace applications are watching
- * the same directory with dnotify their information is chained in dn
- */
-struct dnotify_mark {
- struct fsnotify_mark fsn_mark;
- struct dnotify_struct *dn;
-};
-
-/*
- * When a process starts or stops watching an inode the set of events which
- * dnotify cares about for that inode may change. This function runs the
- * list of everything receiving dnotify events about this directory and calculates
- * the set of all those events. After it updates what dnotify is interested in
- * it calls the fsnotify function so it can update the set of all events relevant
- * to this inode.
- */
-static void dnotify_recalc_inode_mask(struct fsnotify_mark *fsn_mark)
-{
- __u32 new_mask, old_mask;
- struct dnotify_struct *dn;
- struct dnotify_mark *dn_mark = container_of(fsn_mark,
- struct dnotify_mark,
- fsn_mark);
-
- assert_spin_locked(&fsn_mark->lock);
-
- old_mask = fsn_mark->mask;
- new_mask = 0;
- for (dn = dn_mark->dn; dn != NULL; dn = dn->dn_next)
- new_mask |= (dn->dn_mask & ~FS_DN_MULTISHOT);
- fsnotify_set_mark_mask_locked(fsn_mark, new_mask);
-
- if (old_mask == new_mask)
- return;
-
- if (fsn_mark->i.inode)
- fsnotify_recalc_inode_mask(fsn_mark->i.inode);
-}
-
-/*
- * Mains fsnotify call where events are delivered to dnotify.
- * Find the dnotify mark on the relevant inode, run the list of dnotify structs
- * on that mark and determine which of them has expressed interest in receiving
- * events of this type. When found send the correct process and signal and
- * destroy the dnotify struct if it was not registered to receive multiple
- * events.
- */
-static int dnotify_handle_event(struct fsnotify_group *group,
- struct fsnotify_mark *inode_mark,
- struct fsnotify_mark *vfsmount_mark,
- struct fsnotify_event *event)
-{
- struct dnotify_mark *dn_mark;
- struct inode *to_tell;
- struct dnotify_struct *dn;
- struct dnotify_struct **prev;
- struct fown_struct *fown;
- __u32 test_mask = event->mask & ~FS_EVENT_ON_CHILD;
-
- BUG_ON(vfsmount_mark);
-
- to_tell = event->to_tell;
-
- dn_mark = container_of(inode_mark, struct dnotify_mark, fsn_mark);
-
- spin_lock(&inode_mark->lock);
- prev = &dn_mark->dn;
- while ((dn = *prev) != NULL) {
- if ((dn->dn_mask & test_mask) == 0) {
- prev = &dn->dn_next;
- continue;
- }
- fown = &dn->dn_filp->f_owner;
- send_sigio(fown, dn->dn_fd, POLL_MSG);
- if (dn->dn_mask & FS_DN_MULTISHOT)
- prev = &dn->dn_next;
- else {
- *prev = dn->dn_next;
- kmem_cache_free(dnotify_struct_cache, dn);
- dnotify_recalc_inode_mask(inode_mark);
- }
- }
-
- spin_unlock(&inode_mark->lock);
-
- return 0;
-}
-
-/*
- * Given an inode and mask determine if dnotify would be interested in sending
- * userspace notification for that pair.
- */
-static bool dnotify_should_send_event(struct fsnotify_group *group,
- struct inode *inode,
- struct fsnotify_mark *inode_mark,
- struct fsnotify_mark *vfsmount_mark,
- __u32 mask, void *data, int data_type)
-{
- /* not a dir, dnotify doesn't care */
- if (!S_ISDIR(inode->i_mode))
- return false;
-
- return true;
-}
-
-static void dnotify_free_mark(struct fsnotify_mark *fsn_mark)
-{
- struct dnotify_mark *dn_mark = container_of(fsn_mark,
- struct dnotify_mark,
- fsn_mark);
-
- BUG_ON(dn_mark->dn);
-
- kmem_cache_free(dnotify_mark_cache, dn_mark);
-}
-
-static struct fsnotify_ops dnotify_fsnotify_ops = {
- .handle_event = dnotify_handle_event,
- .should_send_event = dnotify_should_send_event,
- .free_group_priv = NULL,
- .freeing_mark = NULL,
- .free_event_priv = NULL,
-};
-
-/*
- * Called every time a file is closed. Looks first for a dnotify mark on the
- * inode. If one is found run all of the ->dn structures attached to that
- * mark for one relevant to this process closing the file and remove that
- * dnotify_struct. If that was the last dnotify_struct also remove the
- * fsnotify_mark.
- */
-void dnotify_flush(struct file *filp, fl_owner_t id)
-{
- struct fsnotify_mark *fsn_mark;
- struct dnotify_mark *dn_mark;
- struct dnotify_struct *dn;
- struct dnotify_struct **prev;
- struct inode *inode;
-
- inode = filp->f_path.dentry->d_inode;
- if (!S_ISDIR(inode->i_mode))
- return;
-
- fsn_mark = fsnotify_find_inode_mark(dnotify_group, inode);
- if (!fsn_mark)
- return;
- dn_mark = container_of(fsn_mark, struct dnotify_mark, fsn_mark);
-
- mutex_lock(&dnotify_mark_mutex);
-
- spin_lock(&fsn_mark->lock);
- prev = &dn_mark->dn;
- while ((dn = *prev) != NULL) {
- if ((dn->dn_owner == id) && (dn->dn_filp == filp)) {
- *prev = dn->dn_next;
- kmem_cache_free(dnotify_struct_cache, dn);
- dnotify_recalc_inode_mask(fsn_mark);
- break;
- }
- prev = &dn->dn_next;
- }
-
- spin_unlock(&fsn_mark->lock);
-
- /* nothing else could have found us thanks to the dnotify_mark_mutex */
- if (dn_mark->dn == NULL)
- fsnotify_destroy_mark(fsn_mark);
-
- mutex_unlock(&dnotify_mark_mutex);
-
- fsnotify_put_mark(fsn_mark);
-}
-
-/* this conversion is done only at watch creation */
-static __u32 convert_arg(unsigned long arg)
-{
- __u32 new_mask = FS_EVENT_ON_CHILD;
-
- if (arg & DN_MULTISHOT)
- new_mask |= FS_DN_MULTISHOT;
- if (arg & DN_DELETE)
- new_mask |= (FS_DELETE | FS_MOVED_FROM);
- if (arg & DN_MODIFY)
- new_mask |= FS_MODIFY;
- if (arg & DN_ACCESS)
- new_mask |= FS_ACCESS;
- if (arg & DN_ATTRIB)
- new_mask |= FS_ATTRIB;
- if (arg & DN_RENAME)
- new_mask |= FS_DN_RENAME;
- if (arg & DN_CREATE)
- new_mask |= (FS_CREATE | FS_MOVED_TO);
-
- return new_mask;
-}
-
-/*
- * If multiple processes watch the same inode with dnotify there is only one
- * dnotify mark in inode->i_fsnotify_marks but we chain a dnotify_struct
- * onto that mark. This function either attaches the new dnotify_struct onto
- * that list, or it |= the mask onto an existing dnofiy_struct.
- */
-static int attach_dn(struct dnotify_struct *dn, struct dnotify_mark *dn_mark,
- fl_owner_t id, int fd, struct file *filp, __u32 mask)
-{
- struct dnotify_struct *odn;
-
- odn = dn_mark->dn;
- while (odn != NULL) {
- /* adding more events to existing dnofiy_struct? */
- if ((odn->dn_owner == id) && (odn->dn_filp == filp)) {
- odn->dn_fd = fd;
- odn->dn_mask |= mask;
- return -EEXIST;
- }
- odn = odn->dn_next;
- }
-
- dn->dn_mask = mask;
- dn->dn_fd = fd;
- dn->dn_filp = filp;
- dn->dn_owner = id;
- dn->dn_next = dn_mark->dn;
- dn_mark->dn = dn;
-
- return 0;
-}
-
-/*
- * When a process calls fcntl to attach a dnotify watch to a directory it ends
- * up here. Allocate both a mark for fsnotify to add and a dnotify_struct to be
- * attached to the fsnotify_mark.
- */
-int fcntl_dirnotify(int fd, struct file *filp, unsigned long arg)
-{
- struct dnotify_mark *new_dn_mark, *dn_mark;
- struct fsnotify_mark *new_fsn_mark, *fsn_mark;
- struct dnotify_struct *dn;
- struct inode *inode;
- fl_owner_t id = current->files;
- struct file *f;
- int destroy = 0, error = 0;
- __u32 mask;
-
- /* we use these to tell if we need to kfree */
- new_fsn_mark = NULL;
- dn = NULL;
-
- if (!dir_notify_enable) {
- error = -EINVAL;
- goto out_err;
- }
-
- /* a 0 mask means we are explicitly removing the watch */
- if ((arg & ~DN_MULTISHOT) == 0) {
- dnotify_flush(filp, id);
- error = 0;
- goto out_err;
- }
-
- /* dnotify only works on directories */
- inode = filp->f_path.dentry->d_inode;
- if (!S_ISDIR(inode->i_mode)) {
- error = -ENOTDIR;
- goto out_err;
- }
-
- /* expect most fcntl to add new rather than augment old */
- dn = kmem_cache_alloc(dnotify_struct_cache, GFP_KERNEL);
- if (!dn) {
- error = -ENOMEM;
- goto out_err;
- }
-
- /* new fsnotify mark, we expect most fcntl calls to add a new mark */
- new_dn_mark = kmem_cache_alloc(dnotify_mark_cache, GFP_KERNEL);
- if (!new_dn_mark) {
- error = -ENOMEM;
- goto out_err;
- }
-
- /* convert the userspace DN_* "arg" to the internal FS_* defines in fsnotify */
- mask = convert_arg(arg);
-
- /* set up the new_fsn_mark and new_dn_mark */
- new_fsn_mark = &new_dn_mark->fsn_mark;
- fsnotify_init_mark(new_fsn_mark, dnotify_free_mark);
- new_fsn_mark->mask = mask;
- new_dn_mark->dn = NULL;
-
- /* this is needed to prevent the fcntl/close race described below */
- mutex_lock(&dnotify_mark_mutex);
-
- /* add the new_fsn_mark or find an old one. */
- fsn_mark = fsnotify_find_inode_mark(dnotify_group, inode);
- if (fsn_mark) {
- dn_mark = container_of(fsn_mark, struct dnotify_mark, fsn_mark);
- spin_lock(&fsn_mark->lock);
- } else {
- fsnotify_add_mark(new_fsn_mark, dnotify_group, inode, NULL, 0);
- spin_lock(&new_fsn_mark->lock);
- fsn_mark = new_fsn_mark;
- dn_mark = new_dn_mark;
- /* we used new_fsn_mark, so don't free it */
- new_fsn_mark = NULL;
- }
-
- rcu_read_lock();
- f = fcheck(fd);
- rcu_read_unlock();
-
- /* if (f != filp) means that we lost a race and another task/thread
- * actually closed the fd we are still playing with before we grabbed
- * the dnotify_mark_mutex and fsn_mark->lock. Since closing the fd is the
- * only time we clean up the marks we need to get our mark off
- * the list. */
- if (f != filp) {
- /* if we added ourselves, shoot ourselves, it's possible that
- * the flush actually did shoot this fsn_mark. That's fine too
- * since multiple calls to destroy_mark is perfectly safe, if
- * we found a dn_mark already attached to the inode, just sod
- * off silently as the flush at close time dealt with it.
- */
- if (dn_mark == new_dn_mark)
- destroy = 1;
- goto out;
- }
-
- error = __f_setown(filp, task_pid(current), PIDTYPE_PID, 0);
- if (error) {
- /* if we added, we must shoot */
- if (dn_mark == new_dn_mark)
- destroy = 1;
- goto out;
- }
-
- error = attach_dn(dn, dn_mark, id, fd, filp, mask);
- /* !error means that we attached the dn to the dn_mark, so don't free it */
- if (!error)
- dn = NULL;
- /* -EEXIST means that we didn't add this new dn and used an old one.
- * that isn't an error (and the unused dn should be freed) */
- else if (error == -EEXIST)
- error = 0;
-
- dnotify_recalc_inode_mask(fsn_mark);
-out:
- spin_unlock(&fsn_mark->lock);
-
- if (destroy)
- fsnotify_destroy_mark(fsn_mark);
-
- mutex_unlock(&dnotify_mark_mutex);
- fsnotify_put_mark(fsn_mark);
-out_err:
- if (new_fsn_mark)
- fsnotify_put_mark(new_fsn_mark);
- if (dn)
- kmem_cache_free(dnotify_struct_cache, dn);
- return error;
-}
-
-static int __init dnotify_init(void)
-{
- dnotify_struct_cache = KMEM_CACHE(dnotify_struct, SLAB_PANIC);
- dnotify_mark_cache = KMEM_CACHE(dnotify_mark, SLAB_PANIC);
-
- dnotify_group = fsnotify_alloc_group(&dnotify_fsnotify_ops);
- if (IS_ERR(dnotify_group))
- panic("unable to allocate fsnotify group for dnotify\n");
- return 0;
-}
-
-module_init(dnotify_init)
diff --git a/ANDROID_3.4.5/fs/notify/fanotify/Kconfig b/ANDROID_3.4.5/fs/notify/fanotify/Kconfig
deleted file mode 100644
index 7dceff00..00000000
--- a/ANDROID_3.4.5/fs/notify/fanotify/Kconfig
+++ /dev/null
@@ -1,26 +0,0 @@
-config FANOTIFY
- bool "Filesystem wide access notification"
- select FSNOTIFY
- select ANON_INODES
- default n
- ---help---
- Say Y here to enable fanotify suport. fanotify is a file access
- notification system which differs from inotify in that it sends
- an open file descriptor to the userspace listener along with
- the event.
-
- If unsure, say Y.
-
-config FANOTIFY_ACCESS_PERMISSIONS
- bool "fanotify permissions checking"
- depends on FANOTIFY
- depends on SECURITY
- default n
- ---help---
- Say Y here is you want fanotify listeners to be able to make permissions
- decisions concerning filesystem events. This is used by some fanotify
- listeners which need to scan files before allowing the system access to
- use those files. This is used by some anti-malware vendors and by some
- hierarchical storage managent systems.
-
- If unsure, say N.
diff --git a/ANDROID_3.4.5/fs/notify/fanotify/Makefile b/ANDROID_3.4.5/fs/notify/fanotify/Makefile
deleted file mode 100644
index 0999213e..00000000
--- a/ANDROID_3.4.5/fs/notify/fanotify/Makefile
+++ /dev/null
@@ -1 +0,0 @@
-obj-$(CONFIG_FANOTIFY) += fanotify.o fanotify_user.o
diff --git a/ANDROID_3.4.5/fs/notify/fanotify/fanotify.c b/ANDROID_3.4.5/fs/notify/fanotify/fanotify.c
deleted file mode 100644
index f35794b9..00000000
--- a/ANDROID_3.4.5/fs/notify/fanotify/fanotify.c
+++ /dev/null
@@ -1,228 +0,0 @@
-#include <linux/fanotify.h>
-#include <linux/fdtable.h>
-#include <linux/fsnotify_backend.h>
-#include <linux/init.h>
-#include <linux/jiffies.h>
-#include <linux/kernel.h> /* UINT_MAX */
-#include <linux/mount.h>
-#include <linux/sched.h>
-#include <linux/types.h>
-#include <linux/wait.h>
-
-static bool should_merge(struct fsnotify_event *old, struct fsnotify_event *new)
-{
- pr_debug("%s: old=%p new=%p\n", __func__, old, new);
-
- if (old->to_tell == new->to_tell &&
- old->data_type == new->data_type &&
- old->tgid == new->tgid) {
- switch (old->data_type) {
- 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;
- default:
- BUG();
- };
- }
- return false;
-}
-
-/* and the list better be locked by something too! */
-static struct fsnotify_event *fanotify_merge(struct list_head *list,
- struct fsnotify_event *event)
-{
- struct fsnotify_event_holder *test_holder;
- struct fsnotify_event *test_event = NULL;
- struct fsnotify_event *new_event;
-
- pr_debug("%s: list=%p event=%p\n", __func__, list, event);
-
-
- list_for_each_entry_reverse(test_holder, list, event_list) {
- if (should_merge(test_holder->event, event)) {
- test_event = test_holder->event;
- break;
- }
- }
-
- if (!test_event)
- return NULL;
-
- fsnotify_get_event(test_event);
-
- /* if they are exactly the same we are done */
- if (test_event->mask == event->mask)
- return test_event;
-
- /*
- * if the refcnt == 2 this is the only queue
- * for this event and so we can update the mask
- * in place.
- */
- if (atomic_read(&test_event->refcnt) == 2) {
- test_event->mask |= event->mask;
- return test_event;
- }
-
- new_event = fsnotify_clone_event(test_event);
-
- /* done with test_event */
- fsnotify_put_event(test_event);
-
- /* couldn't allocate memory, merge was not possible */
- if (unlikely(!new_event))
- return ERR_PTR(-ENOMEM);
-
- /* build new event and replace it on the list */
- new_event->mask = (test_event->mask | event->mask);
- fsnotify_replace_event(test_holder, new_event);
-
- /* we hold a reference on new_event from clone_event */
- return new_event;
-}
-
-#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS
-static int fanotify_get_response_from_access(struct fsnotify_group *group,
- struct fsnotify_event *event)
-{
- int ret;
-
- pr_debug("%s: group=%p event=%p\n", __func__, group, event);
-
- wait_event(group->fanotify_data.access_waitq, event->response ||
- atomic_read(&group->fanotify_data.bypass_perm));
-
- if (!event->response) /* bypass_perm set */
- return 0;
-
- /* userspace responded, convert to something usable */
- spin_lock(&event->lock);
- switch (event->response) {
- case FAN_ALLOW:
- ret = 0;
- break;
- case FAN_DENY:
- default:
- ret = -EPERM;
- }
- event->response = 0;
- spin_unlock(&event->lock);
-
- pr_debug("%s: group=%p event=%p about to return ret=%d\n", __func__,
- group, event, ret);
-
- return ret;
-}
-#endif
-
-static int fanotify_handle_event(struct fsnotify_group *group,
- struct fsnotify_mark *inode_mark,
- struct fsnotify_mark *fanotify_mark,
- struct fsnotify_event *event)
-{
- int ret = 0;
- struct fsnotify_event *notify_event = NULL;
-
- BUILD_BUG_ON(FAN_ACCESS != FS_ACCESS);
- BUILD_BUG_ON(FAN_MODIFY != FS_MODIFY);
- BUILD_BUG_ON(FAN_CLOSE_NOWRITE != FS_CLOSE_NOWRITE);
- BUILD_BUG_ON(FAN_CLOSE_WRITE != FS_CLOSE_WRITE);
- BUILD_BUG_ON(FAN_OPEN != FS_OPEN);
- BUILD_BUG_ON(FAN_EVENT_ON_CHILD != FS_EVENT_ON_CHILD);
- BUILD_BUG_ON(FAN_Q_OVERFLOW != FS_Q_OVERFLOW);
- BUILD_BUG_ON(FAN_OPEN_PERM != FS_OPEN_PERM);
- BUILD_BUG_ON(FAN_ACCESS_PERM != FS_ACCESS_PERM);
- BUILD_BUG_ON(FAN_ONDIR != FS_ISDIR);
-
- pr_debug("%s: group=%p event=%p\n", __func__, group, event);
-
- notify_event = fsnotify_add_notify_event(group, event, NULL, fanotify_merge);
- if (IS_ERR(notify_event))
- return PTR_ERR(notify_event);
-
-#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS
- if (event->mask & FAN_ALL_PERM_EVENTS) {
- /* if we merged we need to wait on the new event */
- if (notify_event)
- event = notify_event;
- ret = fanotify_get_response_from_access(group, event);
- }
-#endif
-
- if (notify_event)
- fsnotify_put_event(notify_event);
-
- return ret;
-}
-
-static bool fanotify_should_send_event(struct fsnotify_group *group,
- struct inode *to_tell,
- struct fsnotify_mark *inode_mark,
- struct fsnotify_mark *vfsmnt_mark,
- __u32 event_mask, void *data, int data_type)
-{
- __u32 marks_mask, marks_ignored_mask;
- struct path *path = data;
-
- pr_debug("%s: group=%p to_tell=%p inode_mark=%p vfsmnt_mark=%p "
- "mask=%x data=%p data_type=%d\n", __func__, group, to_tell,
- inode_mark, vfsmnt_mark, event_mask, data, data_type);
-
- /* if we don't have enough info to send an event to userspace say no */
- if (data_type != FSNOTIFY_EVENT_PATH)
- return false;
-
- /* sorry, fanotify only gives a damn about files and dirs */
- if (!S_ISREG(path->dentry->d_inode->i_mode) &&
- !S_ISDIR(path->dentry->d_inode->i_mode))
- return false;
-
- if (inode_mark && vfsmnt_mark) {
- marks_mask = (vfsmnt_mark->mask | inode_mark->mask);
- marks_ignored_mask = (vfsmnt_mark->ignored_mask | inode_mark->ignored_mask);
- } else if (inode_mark) {
- /*
- * if the event is for a child and this inode doesn't care about
- * events on the child, don't send it!
- */
- if ((event_mask & FS_EVENT_ON_CHILD) &&
- !(inode_mark->mask & FS_EVENT_ON_CHILD))
- return false;
- marks_mask = inode_mark->mask;
- marks_ignored_mask = inode_mark->ignored_mask;
- } else if (vfsmnt_mark) {
- marks_mask = vfsmnt_mark->mask;
- marks_ignored_mask = vfsmnt_mark->ignored_mask;
- } else {
- BUG();
- }
-
- if (S_ISDIR(path->dentry->d_inode->i_mode) &&
- (marks_ignored_mask & FS_ISDIR))
- return false;
-
- if (event_mask & marks_mask & ~marks_ignored_mask)
- return true;
-
- return false;
-}
-
-static void fanotify_free_group_priv(struct fsnotify_group *group)
-{
- struct user_struct *user;
-
- user = group->fanotify_data.user;
- atomic_dec(&user->fanotify_listeners);
- free_uid(user);
-}
-
-const struct fsnotify_ops fanotify_fsnotify_ops = {
- .handle_event = fanotify_handle_event,
- .should_send_event = fanotify_should_send_event,
- .free_group_priv = fanotify_free_group_priv,
- .free_event_priv = NULL,
- .freeing_mark = NULL,
-};
diff --git a/ANDROID_3.4.5/fs/notify/fanotify/fanotify_user.c b/ANDROID_3.4.5/fs/notify/fanotify/fanotify_user.c
deleted file mode 100644
index 3568c8a8..00000000
--- a/ANDROID_3.4.5/fs/notify/fanotify/fanotify_user.c
+++ /dev/null
@@ -1,893 +0,0 @@
-#include <linux/fanotify.h>
-#include <linux/fcntl.h>
-#include <linux/file.h>
-#include <linux/fs.h>
-#include <linux/anon_inodes.h>
-#include <linux/fsnotify_backend.h>
-#include <linux/init.h>
-#include <linux/mount.h>
-#include <linux/namei.h>
-#include <linux/poll.h>
-#include <linux/security.h>
-#include <linux/syscalls.h>
-#include <linux/slab.h>
-#include <linux/types.h>
-#include <linux/uaccess.h>
-
-#include <asm/ioctls.h>
-
-#include "../../mount.h"
-
-#define FANOTIFY_DEFAULT_MAX_EVENTS 16384
-#define FANOTIFY_DEFAULT_MAX_MARKS 8192
-#define FANOTIFY_DEFAULT_MAX_LISTENERS 128
-
-extern const struct fsnotify_ops fanotify_fsnotify_ops;
-
-static struct kmem_cache *fanotify_mark_cache __read_mostly;
-static struct kmem_cache *fanotify_response_event_cache __read_mostly;
-
-struct fanotify_response_event {
- struct list_head list;
- __s32 fd;
- struct fsnotify_event *event;
-};
-
-/*
- * Get an fsnotify notification event if one exists and is small
- * enough to fit in "count". Return an error pointer if the count
- * is not large enough.
- *
- * Called with the group->notification_mutex held.
- */
-static struct fsnotify_event *get_one_event(struct fsnotify_group *group,
- size_t count)
-{
- BUG_ON(!mutex_is_locked(&group->notification_mutex));
-
- pr_debug("%s: group=%p count=%zd\n", __func__, group, count);
-
- if (fsnotify_notify_queue_is_empty(group))
- return NULL;
-
- if (FAN_EVENT_METADATA_LEN > count)
- return ERR_PTR(-EINVAL);
-
- /* held the notification_mutex the whole time, so this is the
- * same event we peeked above */
- return fsnotify_remove_notify_event(group);
-}
-
-static int create_fd(struct fsnotify_group *group, struct fsnotify_event *event)
-{
- int client_fd;
- struct dentry *dentry;
- struct vfsmount *mnt;
- struct file *new_file;
-
- pr_debug("%s: group=%p event=%p\n", __func__, group, event);
-
- client_fd = get_unused_fd();
- if (client_fd < 0)
- return client_fd;
-
- if (event->data_type != FSNOTIFY_EVENT_PATH) {
- WARN_ON(1);
- put_unused_fd(client_fd);
- return -EINVAL;
- }
-
- /*
- * 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->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)
- new_file = dentry_open(dentry, mnt,
- group->fanotify_data.f_flags | FMODE_NONOTIFY,
- current_cred());
- else
- new_file = ERR_PTR(-EOVERFLOW);
- if (IS_ERR(new_file)) {
- /*
- * we still send an event even if we can't open the file. this
- * can happen when say tasks are gone and we try to open their
- * /proc files or we try to open a WRONLY file like in sysfs
- * we just send the errno to userspace since there isn't much
- * else we can do.
- */
- put_unused_fd(client_fd);
- client_fd = PTR_ERR(new_file);
- } else {
- fd_install(client_fd, new_file);
- }
-
- return client_fd;
-}
-
-static int fill_event_metadata(struct fsnotify_group *group,
- struct fanotify_event_metadata *metadata,
- struct fsnotify_event *event)
-{
- int ret = 0;
-
- pr_debug("%s: group=%p metadata=%p event=%p\n", __func__,
- group, metadata, event);
-
- metadata->event_len = FAN_EVENT_METADATA_LEN;
- metadata->metadata_len = FAN_EVENT_METADATA_LEN;
- metadata->vers = FANOTIFY_METADATA_VERSION;
- metadata->mask = event->mask & FAN_ALL_OUTGOING_EVENTS;
- metadata->pid = pid_vnr(event->tgid);
- if (unlikely(event->mask & FAN_Q_OVERFLOW))
- metadata->fd = FAN_NOFD;
- else {
- metadata->fd = create_fd(group, event);
- if (metadata->fd < 0)
- ret = metadata->fd;
- }
-
- return ret;
-}
-
-#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS
-static struct fanotify_response_event *dequeue_re(struct fsnotify_group *group,
- __s32 fd)
-{
- struct fanotify_response_event *re, *return_re = NULL;
-
- mutex_lock(&group->fanotify_data.access_mutex);
- list_for_each_entry(re, &group->fanotify_data.access_list, list) {
- if (re->fd != fd)
- continue;
-
- list_del_init(&re->list);
- return_re = re;
- break;
- }
- mutex_unlock(&group->fanotify_data.access_mutex);
-
- pr_debug("%s: found return_re=%p\n", __func__, return_re);
-
- return return_re;
-}
-
-static int process_access_response(struct fsnotify_group *group,
- struct fanotify_response *response_struct)
-{
- struct fanotify_response_event *re;
- __s32 fd = response_struct->fd;
- __u32 response = response_struct->response;
-
- pr_debug("%s: group=%p fd=%d response=%d\n", __func__, group,
- fd, response);
- /*
- * make sure the response is valid, if invalid we do nothing and either
- * userspace can send a valid response or we will clean it up after the
- * timeout
- */
- switch (response) {
- case FAN_ALLOW:
- case FAN_DENY:
- break;
- default:
- return -EINVAL;
- }
-
- if (fd < 0)
- return -EINVAL;
-
- re = dequeue_re(group, fd);
- if (!re)
- return -ENOENT;
-
- re->event->response = response;
-
- wake_up(&group->fanotify_data.access_waitq);
-
- kmem_cache_free(fanotify_response_event_cache, re);
-
- return 0;
-}
-
-static int prepare_for_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 0;
-
- re = kmem_cache_alloc(fanotify_response_event_cache, GFP_KERNEL);
- if (!re)
- return -ENOMEM;
-
- re->event = event;
- re->fd = fd;
-
- mutex_lock(&group->fanotify_data.access_mutex);
-
- if (atomic_read(&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);
-
- 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,
- __s32 fd)
-{
- 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,
- struct fsnotify_event *event,
- char __user *buf)
-{
- struct fanotify_event_metadata fanotify_event_metadata;
- int fd, ret;
-
- pr_debug("%s: group=%p event=%p\n", __func__, group, event);
-
- ret = fill_event_metadata(group, &fanotify_event_metadata, event);
- 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;
-
- 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);
-out:
-#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS
- if (event->mask & FAN_ALL_PERM_EVENTS) {
- event->response = FAN_DENY;
- wake_up(&group->fanotify_data.access_waitq);
- }
-#endif
- return ret;
-}
-
-/* intofiy userspace file descriptor functions */
-static unsigned int fanotify_poll(struct file *file, poll_table *wait)
-{
- struct fsnotify_group *group = file->private_data;
- int ret = 0;
-
- poll_wait(file, &group->notification_waitq, wait);
- mutex_lock(&group->notification_mutex);
- if (!fsnotify_notify_queue_is_empty(group))
- ret = POLLIN | POLLRDNORM;
- mutex_unlock(&group->notification_mutex);
-
- return ret;
-}
-
-static ssize_t fanotify_read(struct file *file, char __user *buf,
- size_t count, loff_t *pos)
-{
- struct fsnotify_group *group;
- struct fsnotify_event *kevent;
- char __user *start;
- int ret;
- DEFINE_WAIT(wait);
-
- start = buf;
- group = file->private_data;
-
- pr_debug("%s: group=%p\n", __func__, group);
-
- while (1) {
- prepare_to_wait(&group->notification_waitq, &wait, TASK_INTERRUPTIBLE);
-
- mutex_lock(&group->notification_mutex);
- kevent = get_one_event(group, count);
- mutex_unlock(&group->notification_mutex);
-
- if (kevent) {
- ret = PTR_ERR(kevent);
- if (IS_ERR(kevent))
- break;
- ret = copy_event_to_user(group, kevent, buf);
- fsnotify_put_event(kevent);
- if (ret < 0)
- break;
- buf += ret;
- count -= ret;
- continue;
- }
-
- ret = -EAGAIN;
- if (file->f_flags & O_NONBLOCK)
- break;
- ret = -ERESTARTSYS;
- if (signal_pending(current))
- break;
-
- if (start != buf)
- break;
-
- schedule();
- }
-
- finish_wait(&group->notification_waitq, &wait);
- if (start != buf && ret != -EFAULT)
- ret = buf - start;
- return ret;
-}
-
-static ssize_t fanotify_write(struct file *file, const char __user *buf, size_t count, loff_t *pos)
-{
-#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS
- struct fanotify_response response = { .fd = -1, .response = -1 };
- struct fsnotify_group *group;
- int ret;
-
- group = file->private_data;
-
- if (count > sizeof(response))
- count = sizeof(response);
-
- pr_debug("%s: group=%p count=%zu\n", __func__, group, count);
-
- if (copy_from_user(&response, buf, count))
- return -EFAULT;
-
- ret = process_access_response(group, &response);
- if (ret < 0)
- count = ret;
-
- return count;
-#else
- return -EINVAL;
-#endif
-}
-
-static int fanotify_release(struct inode *ignored, struct file *file)
-{
- struct fsnotify_group *group = file->private_data;
-
-#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS
- struct fanotify_response_event *re, *lre;
-
- mutex_lock(&group->fanotify_data.access_mutex);
-
- atomic_inc(&group->fanotify_data.bypass_perm);
-
- 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);
-
- return 0;
-}
-
-static long fanotify_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
-{
- struct fsnotify_group *group;
- struct fsnotify_event_holder *holder;
- void __user *p;
- int ret = -ENOTTY;
- size_t send_len = 0;
-
- group = file->private_data;
-
- p = (void __user *) arg;
-
- switch (cmd) {
- case FIONREAD:
- mutex_lock(&group->notification_mutex);
- list_for_each_entry(holder, &group->notification_list, event_list)
- send_len += FAN_EVENT_METADATA_LEN;
- mutex_unlock(&group->notification_mutex);
- ret = put_user(send_len, (int __user *) p);
- break;
- }
-
- return ret;
-}
-
-static const struct file_operations fanotify_fops = {
- .poll = fanotify_poll,
- .read = fanotify_read,
- .write = fanotify_write,
- .fasync = NULL,
- .release = fanotify_release,
- .unlocked_ioctl = fanotify_ioctl,
- .compat_ioctl = fanotify_ioctl,
- .llseek = noop_llseek,
-};
-
-static void fanotify_free_mark(struct fsnotify_mark *fsn_mark)
-{
- kmem_cache_free(fanotify_mark_cache, fsn_mark);
-}
-
-static int fanotify_find_path(int dfd, const char __user *filename,
- struct path *path, unsigned int flags)
-{
- int ret;
-
- pr_debug("%s: dfd=%d filename=%p flags=%x\n", __func__,
- dfd, filename, flags);
-
- if (filename == NULL) {
- struct file *file;
- int fput_needed;
-
- ret = -EBADF;
- file = fget_light(dfd, &fput_needed);
- if (!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);
- goto out;
- }
-
- *path = file->f_path;
- path_get(path);
- fput_light(file, fput_needed);
- } else {
- unsigned int lookup_flags = 0;
-
- if (!(flags & FAN_MARK_DONT_FOLLOW))
- lookup_flags |= LOOKUP_FOLLOW;
- if (flags & FAN_MARK_ONLYDIR)
- lookup_flags |= LOOKUP_DIRECTORY;
-
- ret = user_path_at(dfd, filename, lookup_flags, path);
- if (ret)
- goto out;
- }
-
- /* you can only watch an inode if you have read permissions on it */
- ret = inode_permission(path->dentry->d_inode, MAY_READ);
- if (ret)
- path_put(path);
-out:
- return ret;
-}
-
-static __u32 fanotify_mark_remove_from_mask(struct fsnotify_mark *fsn_mark,
- __u32 mask,
- unsigned int flags)
-{
- __u32 oldmask;
-
- spin_lock(&fsn_mark->lock);
- if (!(flags & FAN_MARK_IGNORED_MASK)) {
- oldmask = fsn_mark->mask;
- fsnotify_set_mark_mask_locked(fsn_mark, (oldmask & ~mask));
- } else {
- oldmask = fsn_mark->ignored_mask;
- fsnotify_set_mark_ignored_mask_locked(fsn_mark, (oldmask & ~mask));
- }
- spin_unlock(&fsn_mark->lock);
-
- if (!(oldmask & ~mask))
- fsnotify_destroy_mark(fsn_mark);
-
- return mask & oldmask;
-}
-
-static int fanotify_remove_vfsmount_mark(struct fsnotify_group *group,
- struct vfsmount *mnt, __u32 mask,
- unsigned int flags)
-{
- struct fsnotify_mark *fsn_mark = NULL;
- __u32 removed;
-
- fsn_mark = fsnotify_find_vfsmount_mark(group, mnt);
- if (!fsn_mark)
- return -ENOENT;
-
- removed = fanotify_mark_remove_from_mask(fsn_mark, mask, flags);
- fsnotify_put_mark(fsn_mark);
- if (removed & real_mount(mnt)->mnt_fsnotify_mask)
- fsnotify_recalc_vfsmount_mask(mnt);
-
- return 0;
-}
-
-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;
-
- fsn_mark = fsnotify_find_inode_mark(group, inode);
- if (!fsn_mark)
- return -ENOENT;
-
- removed = fanotify_mark_remove_from_mask(fsn_mark, mask, flags);
- /* matches the fsnotify_find_inode_mark() */
- fsnotify_put_mark(fsn_mark);
- if (removed & inode->i_fsnotify_mask)
- fsnotify_recalc_inode_mask(inode);
-
- return 0;
-}
-
-static __u32 fanotify_mark_add_to_mask(struct fsnotify_mark *fsn_mark,
- __u32 mask,
- unsigned int flags)
-{
- __u32 oldmask = -1;
-
- spin_lock(&fsn_mark->lock);
- if (!(flags & FAN_MARK_IGNORED_MASK)) {
- oldmask = fsn_mark->mask;
- fsnotify_set_mark_mask_locked(fsn_mark, (oldmask | mask));
- } else {
- __u32 tmask = fsn_mark->ignored_mask | mask;
- fsnotify_set_mark_ignored_mask_locked(fsn_mark, tmask);
- if (flags & FAN_MARK_IGNORED_SURV_MODIFY)
- fsn_mark->flags |= FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY;
- }
-
- if (!(flags & FAN_MARK_ONDIR)) {
- __u32 tmask = fsn_mark->ignored_mask | FAN_ONDIR;
- fsnotify_set_mark_ignored_mask_locked(fsn_mark, tmask);
- }
-
- spin_unlock(&fsn_mark->lock);
-
- return mask & ~oldmask;
-}
-
-static int fanotify_add_vfsmount_mark(struct fsnotify_group *group,
- struct vfsmount *mnt, __u32 mask,
- unsigned int flags)
-{
- struct fsnotify_mark *fsn_mark;
- __u32 added;
- int ret = 0;
-
- fsn_mark = fsnotify_find_vfsmount_mark(group, mnt);
- if (!fsn_mark) {
- if (atomic_read(&group->num_marks) > group->fanotify_data.max_marks)
- return -ENOSPC;
-
- fsn_mark = kmem_cache_alloc(fanotify_mark_cache, GFP_KERNEL);
- if (!fsn_mark)
- return -ENOMEM;
-
- fsnotify_init_mark(fsn_mark, fanotify_free_mark);
- ret = fsnotify_add_mark(fsn_mark, group, NULL, mnt, 0);
- if (ret)
- goto err;
- }
- added = fanotify_mark_add_to_mask(fsn_mark, mask, flags);
-
- if (added & ~real_mount(mnt)->mnt_fsnotify_mask)
- fsnotify_recalc_vfsmount_mask(mnt);
-err:
- fsnotify_put_mark(fsn_mark);
- return ret;
-}
-
-static int fanotify_add_inode_mark(struct fsnotify_group *group,
- struct inode *inode, __u32 mask,
- unsigned int flags)
-{
- struct fsnotify_mark *fsn_mark;
- __u32 added;
- int ret = 0;
-
- pr_debug("%s: group=%p inode=%p\n", __func__, group, inode);
-
- /*
- * If some other task has this inode open for write we should not add
- * an ignored mark, unless that ignored mark is supposed to survive
- * modification changes anyway.
- */
- if ((flags & FAN_MARK_IGNORED_MASK) &&
- !(flags & FAN_MARK_IGNORED_SURV_MODIFY) &&
- (atomic_read(&inode->i_writecount) > 0))
- return 0;
-
- fsn_mark = fsnotify_find_inode_mark(group, inode);
- if (!fsn_mark) {
- if (atomic_read(&group->num_marks) > group->fanotify_data.max_marks)
- return -ENOSPC;
-
- fsn_mark = kmem_cache_alloc(fanotify_mark_cache, GFP_KERNEL);
- if (!fsn_mark)
- return -ENOMEM;
-
- fsnotify_init_mark(fsn_mark, fanotify_free_mark);
- ret = fsnotify_add_mark(fsn_mark, group, inode, NULL, 0);
- if (ret)
- goto err;
- }
- added = fanotify_mark_add_to_mask(fsn_mark, mask, flags);
-
- if (added & ~inode->i_fsnotify_mask)
- fsnotify_recalc_inode_mask(inode);
-err:
- fsnotify_put_mark(fsn_mark);
- return ret;
-}
-
-/* fanotify syscalls */
-SYSCALL_DEFINE2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags)
-{
- struct fsnotify_group *group;
- int f_flags, fd;
- struct user_struct *user;
-
- pr_debug("%s: flags=%d event_f_flags=%d\n",
- __func__, flags, event_f_flags);
-
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
-
- if (flags & ~FAN_ALL_INIT_FLAGS)
- return -EINVAL;
-
- user = get_current_user();
- if (atomic_read(&user->fanotify_listeners) > FANOTIFY_DEFAULT_MAX_LISTENERS) {
- free_uid(user);
- return -EMFILE;
- }
-
- f_flags = O_RDWR | FMODE_NONOTIFY;
- if (flags & FAN_CLOEXEC)
- f_flags |= O_CLOEXEC;
- if (flags & FAN_NONBLOCK)
- f_flags |= O_NONBLOCK;
-
- /* fsnotify_alloc_group takes a ref. Dropped in fanotify_release */
- group = fsnotify_alloc_group(&fanotify_fsnotify_ops);
- if (IS_ERR(group)) {
- free_uid(user);
- return PTR_ERR(group);
- }
-
- group->fanotify_data.user = user;
- atomic_inc(&user->fanotify_listeners);
-
- group->fanotify_data.f_flags = event_f_flags;
-#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS
- mutex_init(&group->fanotify_data.access_mutex);
- init_waitqueue_head(&group->fanotify_data.access_waitq);
- INIT_LIST_HEAD(&group->fanotify_data.access_list);
- atomic_set(&group->fanotify_data.bypass_perm, 0);
-#endif
- switch (flags & FAN_ALL_CLASS_BITS) {
- case FAN_CLASS_NOTIF:
- group->priority = FS_PRIO_0;
- break;
- case FAN_CLASS_CONTENT:
- group->priority = FS_PRIO_1;
- break;
- case FAN_CLASS_PRE_CONTENT:
- group->priority = FS_PRIO_2;
- break;
- default:
- fd = -EINVAL;
- goto out_put_group;
- }
-
- if (flags & FAN_UNLIMITED_QUEUE) {
- fd = -EPERM;
- if (!capable(CAP_SYS_ADMIN))
- goto out_put_group;
- group->max_events = UINT_MAX;
- } else {
- group->max_events = FANOTIFY_DEFAULT_MAX_EVENTS;
- }
-
- if (flags & FAN_UNLIMITED_MARKS) {
- fd = -EPERM;
- if (!capable(CAP_SYS_ADMIN))
- goto out_put_group;
- group->fanotify_data.max_marks = UINT_MAX;
- } else {
- group->fanotify_data.max_marks = FANOTIFY_DEFAULT_MAX_MARKS;
- }
-
- fd = anon_inode_getfd("[fanotify]", &fanotify_fops, group, f_flags);
- if (fd < 0)
- goto out_put_group;
-
- return fd;
-
-out_put_group:
- fsnotify_put_group(group);
- return fd;
-}
-
-SYSCALL_DEFINE(fanotify_mark)(int fanotify_fd, unsigned int flags,
- __u64 mask, int dfd,
- const char __user * pathname)
-{
- struct inode *inode = NULL;
- struct vfsmount *mnt = NULL;
- struct fsnotify_group *group;
- struct file *filp;
- struct path path;
- int ret, fput_needed;
-
- pr_debug("%s: fanotify_fd=%d flags=%x dfd=%d pathname=%p mask=%llx\n",
- __func__, fanotify_fd, flags, dfd, pathname, mask);
-
- /* we only use the lower 32 bits as of right now. */
- if (mask & ((__u64)0xffffffff << 32))
- return -EINVAL;
-
- if (flags & ~FAN_ALL_MARK_FLAGS)
- return -EINVAL;
- switch (flags & (FAN_MARK_ADD | FAN_MARK_REMOVE | FAN_MARK_FLUSH)) {
- case FAN_MARK_ADD: /* fallthrough */
- case FAN_MARK_REMOVE:
- if (!mask)
- return -EINVAL;
- case FAN_MARK_FLUSH:
- break;
- default:
- return -EINVAL;
- }
-
- if (mask & FAN_ONDIR) {
- flags |= FAN_MARK_ONDIR;
- mask &= ~FAN_ONDIR;
- }
-
-#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS
- if (mask & ~(FAN_ALL_EVENTS | FAN_ALL_PERM_EVENTS | FAN_EVENT_ON_CHILD))
-#else
- if (mask & ~(FAN_ALL_EVENTS | FAN_EVENT_ON_CHILD))
-#endif
- return -EINVAL;
-
- filp = fget_light(fanotify_fd, &fput_needed);
- if (unlikely(!filp))
- return -EBADF;
-
- /* verify that this is indeed an fanotify instance */
- ret = -EINVAL;
- if (unlikely(filp->f_op != &fanotify_fops))
- goto fput_and_out;
- group = filp->private_data;
-
- /*
- * group->priority == FS_PRIO_0 == FAN_CLASS_NOTIF. These are not
- * allowed to set permissions events.
- */
- ret = -EINVAL;
- if (mask & FAN_ALL_PERM_EVENTS &&
- group->priority == FS_PRIO_0)
- goto fput_and_out;
-
- ret = fanotify_find_path(dfd, pathname, &path, flags);
- if (ret)
- goto fput_and_out;
-
- /* inode held in place by reference to path; group by fget on fd */
- if (!(flags & FAN_MARK_MOUNT))
- inode = path.dentry->d_inode;
- else
- mnt = path.mnt;
-
- /* create/update an inode mark */
- switch (flags & (FAN_MARK_ADD | FAN_MARK_REMOVE | FAN_MARK_FLUSH)) {
- case FAN_MARK_ADD:
- if (flags & FAN_MARK_MOUNT)
- ret = fanotify_add_vfsmount_mark(group, mnt, mask, flags);
- else
- ret = fanotify_add_inode_mark(group, inode, mask, flags);
- break;
- case FAN_MARK_REMOVE:
- if (flags & FAN_MARK_MOUNT)
- ret = fanotify_remove_vfsmount_mark(group, mnt, mask, flags);
- else
- ret = fanotify_remove_inode_mark(group, inode, mask, flags);
- break;
- case FAN_MARK_FLUSH:
- if (flags & FAN_MARK_MOUNT)
- fsnotify_clear_vfsmount_marks_by_group(group);
- else
- fsnotify_clear_inode_marks_by_group(group);
- break;
- default:
- ret = -EINVAL;
- }
-
- path_put(&path);
-fput_and_out:
- fput_light(filp, fput_needed);
- return ret;
-}
-
-#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS
-asmlinkage long SyS_fanotify_mark(long fanotify_fd, long flags, __u64 mask,
- long dfd, long pathname)
-{
- return SYSC_fanotify_mark((int) fanotify_fd, (unsigned int) flags,
- mask, (int) dfd,
- (const char __user *) pathname);
-}
-SYSCALL_ALIAS(sys_fanotify_mark, SyS_fanotify_mark);
-#endif
-
-/*
- * fanotify_user_setup - Our initialization function. Note that we cannot return
- * error because we have compiled-in VFS hooks. So an (unlikely) failure here
- * must result in panic().
- */
-static int __init fanotify_user_setup(void)
-{
- fanotify_mark_cache = KMEM_CACHE(fsnotify_mark, SLAB_PANIC);
- fanotify_response_event_cache = KMEM_CACHE(fanotify_response_event,
- SLAB_PANIC);
-
- return 0;
-}
-device_initcall(fanotify_user_setup);
diff --git a/ANDROID_3.4.5/fs/notify/fsnotify.c b/ANDROID_3.4.5/fs/notify/fsnotify.c
deleted file mode 100644
index ccb14d3f..00000000
--- a/ANDROID_3.4.5/fs/notify/fsnotify.c
+++ /dev/null
@@ -1,311 +0,0 @@
-/*
- * Copyright (C) 2008 Red Hat, Inc., Eric Paris <eparis@redhat.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; see the file COPYING. If not, write to
- * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <linux/dcache.h>
-#include <linux/fs.h>
-#include <linux/gfp.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/mount.h>
-#include <linux/srcu.h>
-
-#include <linux/fsnotify_backend.h>
-#include "fsnotify.h"
-#include "../mount.h"
-
-/*
- * Clear all of the marks on an inode when it is being evicted from core
- */
-void __fsnotify_inode_delete(struct inode *inode)
-{
- fsnotify_clear_marks_by_inode(inode);
-}
-EXPORT_SYMBOL_GPL(__fsnotify_inode_delete);
-
-void __fsnotify_vfsmount_delete(struct vfsmount *mnt)
-{
- fsnotify_clear_marks_by_mount(mnt);
-}
-
-/*
- * Given an inode, first check if we care what happens to our children. Inotify
- * and dnotify both tell their parents about events. If we care about any event
- * on a child we run all of our children and set a dentry flag saying that the
- * parent cares. Thus when an event happens on a child it can quickly tell if
- * if there is a need to find a parent and send the event to the parent.
- */
-void __fsnotify_update_child_dentry_flags(struct inode *inode)
-{
- struct dentry *alias;
- int watched;
-
- if (!S_ISDIR(inode->i_mode))
- return;
-
- /* determine if the children should tell inode about their events */
- watched = fsnotify_inode_watches_children(inode);
-
- spin_lock(&inode->i_lock);
- /* run all of the dentries associated with this inode. Since this is a
- * directory, there damn well better only be one item on this list */
- list_for_each_entry(alias, &inode->i_dentry, d_alias) {
- struct dentry *child;
-
- /* run all of the children of the original inode and fix their
- * d_flags to indicate parental interest (their parent is the
- * original inode) */
- spin_lock(&alias->d_lock);
- list_for_each_entry(child, &alias->d_subdirs, d_u.d_child) {
- if (!child->d_inode)
- continue;
-
- spin_lock_nested(&child->d_lock, DENTRY_D_LOCK_NESTED);
- if (watched)
- child->d_flags |= DCACHE_FSNOTIFY_PARENT_WATCHED;
- else
- child->d_flags &= ~DCACHE_FSNOTIFY_PARENT_WATCHED;
- spin_unlock(&child->d_lock);
- }
- spin_unlock(&alias->d_lock);
- }
- spin_unlock(&inode->i_lock);
-}
-
-/* Notify this dentry's parent about a child's events. */
-int __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask)
-{
- struct dentry *parent;
- struct inode *p_inode;
- int ret = 0;
-
- if (!dentry)
- dentry = path->dentry;
-
- if (!(dentry->d_flags & DCACHE_FSNOTIFY_PARENT_WATCHED))
- return 0;
-
- parent = dget_parent(dentry);
- p_inode = parent->d_inode;
-
- if (unlikely(!fsnotify_inode_watches_children(p_inode)))
- __fsnotify_update_child_dentry_flags(p_inode);
- else if (p_inode->i_fsnotify_mask & mask) {
- /* we are notifying a parent so come up with the new mask which
- * specifies these are events which came from a child. */
- mask |= FS_EVENT_ON_CHILD;
-
- if (path)
- ret = fsnotify(p_inode, mask, path, FSNOTIFY_EVENT_PATH,
- dentry->d_name.name, 0);
- else
- ret = fsnotify(p_inode, mask, dentry->d_inode, FSNOTIFY_EVENT_INODE,
- dentry->d_name.name, 0);
- }
-
- dput(parent);
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(__fsnotify_parent);
-
-static int send_to_group(struct inode *to_tell, struct vfsmount *mnt,
- struct fsnotify_mark *inode_mark,
- struct fsnotify_mark *vfsmount_mark,
- __u32 mask, void *data,
- int data_is, u32 cookie,
- const unsigned char *file_name,
- struct fsnotify_event **event)
-{
- struct fsnotify_group *group = NULL;
- __u32 inode_test_mask = 0;
- __u32 vfsmount_test_mask = 0;
-
- if (unlikely(!inode_mark && !vfsmount_mark)) {
- BUG();
- return 0;
- }
-
- /* clear ignored on inode modification */
- if (mask & FS_MODIFY) {
- if (inode_mark &&
- !(inode_mark->flags & FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY))
- inode_mark->ignored_mask = 0;
- if (vfsmount_mark &&
- !(vfsmount_mark->flags & FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY))
- vfsmount_mark->ignored_mask = 0;
- }
-
- /* 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;
-
- if (group->ops->should_send_event(group, to_tell, inode_mark,
- vfsmount_mark, mask, data,
- data_is) == false)
- return 0;
-
- if (!*event) {
- *event = fsnotify_create_event(to_tell, mask, data,
- data_is, file_name,
- cookie, GFP_KERNEL);
- if (!*event)
- return -ENOMEM;
- }
- return group->ops->handle_event(group, inode_mark, vfsmount_mark, *event);
-}
-
-/*
- * This is the main call to fsnotify. The VFS calls into hook specific functions
- * in linux/fsnotify.h. Those functions then in turn call here. Here will call
- * out to all of the registered fsnotify_group. Those groups can then use the
- * notification event in whatever means they feel necessary.
- */
-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 = 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 mount *mnt;
- int idx, ret = 0;
- /* 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_PATH)
- mnt = real_mount(((struct path *)data)->mnt);
- else
- mnt = NULL;
-
- /*
- * if this is a modify event we may need to clear the ignored masks
- * otherwise return if neither the inode nor the vfsmount care about
- * this type of event.
- */
- if (!(mask & FS_MODIFY) &&
- !(test_mask & to_tell->i_fsnotify_mask) &&
- !(mnt && test_mask & mnt->mnt_fsnotify_mask))
- return 0;
-
- idx = srcu_read_lock(&fsnotify_mark_srcu);
-
- if ((mask & FS_MODIFY) ||
- (test_mask & to_tell->i_fsnotify_mask))
- inode_node = srcu_dereference(to_tell->i_fsnotify_marks.first,
- &fsnotify_mark_srcu);
-
- 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;
- }
-
- 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;
- }
-
- if (inode_group > vfsmount_group) {
- /* handle inode */
- ret = send_to_group(to_tell, NULL, inode_mark, NULL, mask, data,
- data_is, cookie, file_name, &event);
- /* we didn't use the vfsmount_mark */
- vfsmount_group = NULL;
- } else if (vfsmount_group > inode_group) {
- ret = send_to_group(to_tell, &mnt->mnt, NULL, vfsmount_mark, mask, data,
- data_is, cookie, file_name, &event);
- inode_group = NULL;
- } else {
- ret = send_to_group(to_tell, &mnt->mnt, inode_mark, vfsmount_mark,
- mask, data, data_is, cookie, file_name,
- &event);
- }
-
- if (ret && (mask & ALL_FSNOTIFY_PERM_EVENTS))
- goto out;
-
- if (inode_group)
- inode_node = srcu_dereference(inode_node->next,
- &fsnotify_mark_srcu);
- if (vfsmount_group)
- vfsmount_node = srcu_dereference(vfsmount_node->next,
- &fsnotify_mark_srcu);
- }
- ret = 0;
-out:
- srcu_read_unlock(&fsnotify_mark_srcu, idx);
- /*
- * fsnotify_create_event() took a reference so the event can't be cleaned
- * up while we are still trying to add it to lists, drop that one.
- */
- if (event)
- fsnotify_put_event(event);
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(fsnotify);
-
-static __init int fsnotify_init(void)
-{
- int ret;
-
- BUG_ON(hweight32(ALL_FSNOTIFY_EVENTS) != 23);
-
- ret = init_srcu_struct(&fsnotify_mark_srcu);
- if (ret)
- panic("initializing fsnotify_mark_srcu");
-
- return 0;
-}
-core_initcall(fsnotify_init);
diff --git a/ANDROID_3.4.5/fs/notify/fsnotify.h b/ANDROID_3.4.5/fs/notify/fsnotify.h
deleted file mode 100644
index 85e7d2b4..00000000
--- a/ANDROID_3.4.5/fs/notify/fsnotify.h
+++ /dev/null
@@ -1,47 +0,0 @@
-#ifndef __FS_NOTIFY_FSNOTIFY_H_
-#define __FS_NOTIFY_FSNOTIFY_H_
-
-#include <linux/list.h>
-#include <linux/fsnotify.h>
-#include <linux/srcu.h>
-#include <linux/types.h>
-
-/* destroy all events sitting in this groups notification queue */
-extern void fsnotify_flush_notify(struct fsnotify_group *group);
-
-/* protects reads of inode and vfsmount marks list */
-extern struct srcu_struct fsnotify_mark_srcu;
-
-extern void fsnotify_set_inode_mark_mask_locked(struct fsnotify_mark *fsn_mark,
- __u32 mask);
-/* add a mark to an inode */
-extern int fsnotify_add_inode_mark(struct fsnotify_mark *mark,
- struct fsnotify_group *group, struct inode *inode,
- int allow_dups);
-/* add a mark to a vfsmount */
-extern int fsnotify_add_vfsmount_mark(struct fsnotify_mark *mark,
- struct fsnotify_group *group, struct vfsmount *mnt,
- int allow_dups);
-
-/* final kfree of a group */
-extern void fsnotify_final_destroy_group(struct fsnotify_group *group);
-
-/* vfsmount specific destruction of a mark */
-extern void fsnotify_destroy_vfsmount_mark(struct fsnotify_mark *mark);
-/* inode specific destruction of a mark */
-extern void fsnotify_destroy_inode_mark(struct fsnotify_mark *mark);
-/* run the list of all marks associated with inode and flag them to be freed */
-extern void fsnotify_clear_marks_by_inode(struct inode *inode);
-/* run the list of all marks associated with vfsmount and flag them to be freed */
-extern void fsnotify_clear_marks_by_mount(struct vfsmount *mnt);
-/*
- * update the dentry->d_flags of all of inode's children to indicate if inode cares
- * about events that happen to its children.
- */
-extern void __fsnotify_update_child_dentry_flags(struct inode *inode);
-
-/* allocate and destroy and event holder to attach events to notification/access queues */
-extern struct fsnotify_event_holder *fsnotify_alloc_event_holder(void);
-extern void fsnotify_destroy_event_holder(struct fsnotify_event_holder *holder);
-
-#endif /* __FS_NOTIFY_FSNOTIFY_H_ */
diff --git a/ANDROID_3.4.5/fs/notify/group.c b/ANDROID_3.4.5/fs/notify/group.c
deleted file mode 100644
index 63fc294a..00000000
--- a/ANDROID_3.4.5/fs/notify/group.c
+++ /dev/null
@@ -1,104 +0,0 @@
-/*
- * Copyright (C) 2008 Red Hat, Inc., Eric Paris <eparis@redhat.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; see the file COPYING. If not, write to
- * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <linux/list.h>
-#include <linux/mutex.h>
-#include <linux/slab.h>
-#include <linux/srcu.h>
-#include <linux/rculist.h>
-#include <linux/wait.h>
-
-#include <linux/fsnotify_backend.h>
-#include "fsnotify.h"
-
-#include <linux/atomic.h>
-
-/*
- * Final freeing of a group
- */
-void fsnotify_final_destroy_group(struct fsnotify_group *group)
-{
- /* clear the notification queue of all events */
- fsnotify_flush_notify(group);
-
- if (group->ops->free_group_priv)
- group->ops->free_group_priv(group);
-
- kfree(group);
-}
-
-/*
- * Trying to get rid of a group. We need to first get rid of any outstanding
- * allocations and then free the group. Remember that fsnotify_clear_marks_by_group
- * could miss marks that are being freed by inode and those marks could still
- * hold a reference to this group (via group->num_marks) If we get into that
- * situtation, the fsnotify_final_destroy_group will get called when that final
- * mark is freed.
- */
-static void fsnotify_destroy_group(struct fsnotify_group *group)
-{
- /* clear all inode marks for this group */
- fsnotify_clear_marks_by_group(group);
-
- synchronize_srcu(&fsnotify_mark_srcu);
-
- /* past the point of no return, matches the initial value of 1 */
- if (atomic_dec_and_test(&group->num_marks))
- fsnotify_final_destroy_group(group);
-}
-
-/*
- * Drop a reference to a group. Free it if it's through.
- */
-void fsnotify_put_group(struct fsnotify_group *group)
-{
- if (atomic_dec_and_test(&group->refcnt))
- fsnotify_destroy_group(group);
-}
-
-/*
- * Create a new fsnotify_group and hold a reference for the group returned.
- */
-struct fsnotify_group *fsnotify_alloc_group(const struct fsnotify_ops *ops)
-{
- struct fsnotify_group *group;
-
- group = kzalloc(sizeof(struct fsnotify_group), GFP_KERNEL);
- if (!group)
- return ERR_PTR(-ENOMEM);
-
- /* set to 0 when there a no external references to this group */
- atomic_set(&group->refcnt, 1);
- /*
- * hits 0 when there are no external references AND no marks for
- * this group
- */
- atomic_set(&group->num_marks, 1);
-
- mutex_init(&group->notification_mutex);
- INIT_LIST_HEAD(&group->notification_list);
- init_waitqueue_head(&group->notification_waitq);
- group->max_events = UINT_MAX;
-
- spin_lock_init(&group->mark_lock);
- INIT_LIST_HEAD(&group->marks_list);
-
- group->ops = ops;
-
- return group;
-}
diff --git a/ANDROID_3.4.5/fs/notify/inode_mark.c b/ANDROID_3.4.5/fs/notify/inode_mark.c
deleted file mode 100644
index b13c00ac..00000000
--- a/ANDROID_3.4.5/fs/notify/inode_mark.c
+++ /dev/null
@@ -1,315 +0,0 @@
-/*
- * Copyright (C) 2008 Red Hat, Inc., Eric Paris <eparis@redhat.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; see the file COPYING. If not, write to
- * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/spinlock.h>
-
-#include <linux/atomic.h>
-
-#include <linux/fsnotify_backend.h>
-#include "fsnotify.h"
-
-#include "../internal.h"
-
-/*
- * Recalculate the mask of events relevant to a given inode locked.
- */
-static void fsnotify_recalc_inode_mask_locked(struct inode *inode)
-{
- struct fsnotify_mark *mark;
- struct hlist_node *pos;
- __u32 new_mask = 0;
-
- assert_spin_locked(&inode->i_lock);
-
- hlist_for_each_entry(mark, pos, &inode->i_fsnotify_marks, i.i_list)
- new_mask |= mark->mask;
- inode->i_fsnotify_mask = new_mask;
-}
-
-/*
- * Recalculate the inode->i_fsnotify_mask, or the mask of all FS_* event types
- * any notifier is interested in hearing for this inode.
- */
-void fsnotify_recalc_inode_mask(struct inode *inode)
-{
- spin_lock(&inode->i_lock);
- fsnotify_recalc_inode_mask_locked(inode);
- spin_unlock(&inode->i_lock);
-
- __fsnotify_update_child_dentry_flags(inode);
-}
-
-void fsnotify_destroy_inode_mark(struct fsnotify_mark *mark)
-{
- struct inode *inode = mark->i.inode;
-
- assert_spin_locked(&mark->lock);
- assert_spin_locked(&mark->group->mark_lock);
-
- spin_lock(&inode->i_lock);
-
- hlist_del_init_rcu(&mark->i.i_list);
- mark->i.inode = NULL;
-
- /*
- * this mark is now off the inode->i_fsnotify_marks list and we
- * hold the inode->i_lock, so this is the perfect time to update the
- * inode->i_fsnotify_mask
- */
- fsnotify_recalc_inode_mask_locked(inode);
-
- spin_unlock(&inode->i_lock);
-}
-
-/*
- * Given an inode, destroy all of the marks associated with that inode.
- */
-void fsnotify_clear_marks_by_inode(struct inode *inode)
-{
- struct fsnotify_mark *mark, *lmark;
- struct hlist_node *pos, *n;
- LIST_HEAD(free_list);
-
- spin_lock(&inode->i_lock);
- hlist_for_each_entry_safe(mark, pos, n, &inode->i_fsnotify_marks, i.i_list) {
- list_add(&mark->i.free_i_list, &free_list);
- hlist_del_init_rcu(&mark->i.i_list);
- fsnotify_get_mark(mark);
- }
- spin_unlock(&inode->i_lock);
-
- list_for_each_entry_safe(mark, lmark, &free_list, i.free_i_list) {
- fsnotify_destroy_mark(mark);
- fsnotify_put_mark(mark);
- }
-}
-
-/*
- * Given a group clear all of the inode marks associated with that group.
- */
-void fsnotify_clear_inode_marks_by_group(struct fsnotify_group *group)
-{
- fsnotify_clear_marks_by_group_flags(group, FSNOTIFY_MARK_FLAG_INODE);
-}
-
-/*
- * given a group and inode, find the mark associated with that combination.
- * if found take a reference to that mark and return it, else return NULL
- */
-struct fsnotify_mark *fsnotify_find_inode_mark_locked(struct fsnotify_group *group,
- struct inode *inode)
-{
- struct fsnotify_mark *mark;
- struct hlist_node *pos;
-
- assert_spin_locked(&inode->i_lock);
-
- hlist_for_each_entry(mark, pos, &inode->i_fsnotify_marks, i.i_list) {
- if (mark->group == group) {
- fsnotify_get_mark(mark);
- return mark;
- }
- }
- return NULL;
-}
-
-/*
- * given a group and inode, find the mark associated with that combination.
- * if found take a reference to that mark and return it, else return NULL
- */
-struct fsnotify_mark *fsnotify_find_inode_mark(struct fsnotify_group *group,
- struct inode *inode)
-{
- struct fsnotify_mark *mark;
-
- spin_lock(&inode->i_lock);
- mark = fsnotify_find_inode_mark_locked(group, inode);
- spin_unlock(&inode->i_lock);
-
- return mark;
-}
-
-/*
- * If we are setting a mark mask on an inode mark we should pin the inode
- * in memory.
- */
-void fsnotify_set_inode_mark_mask_locked(struct fsnotify_mark *mark,
- __u32 mask)
-{
- struct inode *inode;
-
- assert_spin_locked(&mark->lock);
-
- if (mask &&
- mark->i.inode &&
- !(mark->flags & FSNOTIFY_MARK_FLAG_OBJECT_PINNED)) {
- mark->flags |= FSNOTIFY_MARK_FLAG_OBJECT_PINNED;
- inode = igrab(mark->i.inode);
- /*
- * we shouldn't be able to get here if the inode wasn't
- * already safely held in memory. But bug in case it
- * ever is wrong.
- */
- BUG_ON(!inode);
- }
-}
-
-/*
- * Attach an initialized mark to a given inode.
- * These marks may be used for the fsnotify backend to determine which
- * event types should be delivered to which group and for which inodes. These
- * marks are ordered according to priority, highest number first, and then by
- * the group's location in memory.
- */
-int fsnotify_add_inode_mark(struct fsnotify_mark *mark,
- struct fsnotify_group *group, struct inode *inode,
- int allow_dups)
-{
- struct fsnotify_mark *lmark;
- struct hlist_node *node, *last = NULL;
- int ret = 0;
-
- mark->flags |= FSNOTIFY_MARK_FLAG_INODE;
-
- assert_spin_locked(&mark->lock);
- assert_spin_locked(&group->mark_lock);
-
- spin_lock(&inode->i_lock);
-
- mark->i.inode = inode;
-
- /* is mark the first mark? */
- if (hlist_empty(&inode->i_fsnotify_marks)) {
- hlist_add_head_rcu(&mark->i.i_list, &inode->i_fsnotify_marks);
- goto out;
- }
-
- /* should mark be in the middle of the current list? */
- hlist_for_each_entry(lmark, node, &inode->i_fsnotify_marks, i.i_list) {
- last = node;
-
- if ((lmark->group == group) && !allow_dups) {
- ret = -EEXIST;
- goto out;
- }
-
- if (mark->group->priority < lmark->group->priority)
- continue;
-
- if ((mark->group->priority == lmark->group->priority) &&
- (mark->group < lmark->group))
- continue;
-
- hlist_add_before_rcu(&mark->i.i_list, &lmark->i.i_list);
- goto out;
- }
-
- BUG_ON(last == NULL);
- /* mark should be the last entry. last is the current last entry */
- hlist_add_after_rcu(last, &mark->i.i_list);
-out:
- fsnotify_recalc_inode_mask_locked(inode);
- spin_unlock(&inode->i_lock);
-
- return ret;
-}
-
-/**
- * fsnotify_unmount_inodes - an sb is unmounting. handle any watched inodes.
- * @list: list of inodes being unmounted (sb->s_inodes)
- *
- * Called during unmount with no locks held, so needs to be safe against
- * concurrent modifiers. We temporarily drop inode_sb_list_lock and CAN block.
- */
-void fsnotify_unmount_inodes(struct list_head *list)
-{
- struct inode *inode, *next_i, *need_iput = NULL;
-
- spin_lock(&inode_sb_list_lock);
- list_for_each_entry_safe(inode, next_i, list, i_sb_list) {
- struct inode *need_iput_tmp;
-
- /*
- * We cannot __iget() an inode in state I_FREEING,
- * I_WILL_FREE, or I_NEW which is fine because by that point
- * the inode cannot have any associated watches.
- */
- spin_lock(&inode->i_lock);
- if (inode->i_state & (I_FREEING|I_WILL_FREE|I_NEW)) {
- spin_unlock(&inode->i_lock);
- continue;
- }
-
- /*
- * If i_count is zero, the inode cannot have any watches and
- * doing an __iget/iput with MS_ACTIVE clear would actually
- * evict all inodes with zero i_count from icache which is
- * unnecessarily violent and may in fact be illegal to do.
- */
- if (!atomic_read(&inode->i_count)) {
- spin_unlock(&inode->i_lock);
- continue;
- }
-
- need_iput_tmp = need_iput;
- need_iput = NULL;
-
- /* In case fsnotify_inode_delete() drops a reference. */
- if (inode != need_iput_tmp)
- __iget(inode);
- else
- need_iput_tmp = NULL;
- spin_unlock(&inode->i_lock);
-
- /* In case the dropping of a reference would nuke next_i. */
- if ((&next_i->i_sb_list != list) &&
- atomic_read(&next_i->i_count)) {
- spin_lock(&next_i->i_lock);
- if (!(next_i->i_state & (I_FREEING | I_WILL_FREE))) {
- __iget(next_i);
- need_iput = next_i;
- }
- spin_unlock(&next_i->i_lock);
- }
-
- /*
- * We can safely drop inode_sb_list_lock here because we hold
- * references on both inode and next_i. Also no new inodes
- * will be added since the umount has begun.
- */
- spin_unlock(&inode_sb_list_lock);
-
- if (need_iput_tmp)
- iput(need_iput_tmp);
-
- /* for each watch, send FS_UNMOUNT and then remove it */
- fsnotify(inode, FS_UNMOUNT, inode, FSNOTIFY_EVENT_INODE, NULL, 0);
-
- fsnotify_inode_delete(inode);
-
- iput(inode);
-
- spin_lock(&inode_sb_list_lock);
- }
- spin_unlock(&inode_sb_list_lock);
-}
diff --git a/ANDROID_3.4.5/fs/notify/inotify/Kconfig b/ANDROID_3.4.5/fs/notify/inotify/Kconfig
deleted file mode 100644
index b981fc0c..00000000
--- a/ANDROID_3.4.5/fs/notify/inotify/Kconfig
+++ /dev/null
@@ -1,17 +0,0 @@
-config INOTIFY_USER
- bool "Inotify support for userspace"
- select ANON_INODES
- select FSNOTIFY
- default y
- ---help---
- Say Y here to enable inotify support for userspace, including the
- associated system calls. Inotify allows monitoring of both files and
- directories via a single open fd. Events are read from the file
- descriptor, which is also select()- and poll()-able.
- Inotify fixes numerous shortcomings in dnotify and introduces several
- new features including multiple file events, one-shot support, and
- unmount notification.
-
- For more information, see <file:Documentation/filesystems/inotify.txt>
-
- If unsure, say Y.
diff --git a/ANDROID_3.4.5/fs/notify/inotify/Makefile b/ANDROID_3.4.5/fs/notify/inotify/Makefile
deleted file mode 100644
index a380dabe..00000000
--- a/ANDROID_3.4.5/fs/notify/inotify/Makefile
+++ /dev/null
@@ -1 +0,0 @@
-obj-$(CONFIG_INOTIFY_USER) += inotify_fsnotify.o inotify_user.o
diff --git a/ANDROID_3.4.5/fs/notify/inotify/inotify.h b/ANDROID_3.4.5/fs/notify/inotify/inotify.h
deleted file mode 100644
index b6642e4d..00000000
--- a/ANDROID_3.4.5/fs/notify/inotify/inotify.h
+++ /dev/null
@@ -1,21 +0,0 @@
-#include <linux/fsnotify_backend.h>
-#include <linux/inotify.h>
-#include <linux/slab.h> /* struct kmem_cache */
-
-extern struct kmem_cache *event_priv_cachep;
-
-struct inotify_event_private_data {
- struct fsnotify_event_private_data fsnotify_event_priv_data;
- int wd;
-};
-
-struct inotify_inode_mark {
- struct fsnotify_mark fsn_mark;
- int wd;
-};
-
-extern void inotify_ignored_and_remove_idr(struct fsnotify_mark *fsn_mark,
- struct fsnotify_group *group);
-extern void inotify_free_event_priv(struct fsnotify_event_private_data *event_priv);
-
-extern const struct fsnotify_ops inotify_fsnotify_ops;
diff --git a/ANDROID_3.4.5/fs/notify/inotify/inotify_fsnotify.c b/ANDROID_3.4.5/fs/notify/inotify/inotify_fsnotify.c
deleted file mode 100644
index e3cbd746..00000000
--- a/ANDROID_3.4.5/fs/notify/inotify/inotify_fsnotify.c
+++ /dev/null
@@ -1,222 +0,0 @@
-/*
- * fs/inotify_user.c - inotify support for userspace
- *
- * Authors:
- * John McCutchan <ttb@tentacle.dhs.org>
- * Robert Love <rml@novell.com>
- *
- * Copyright (C) 2005 John McCutchan
- * Copyright 2006 Hewlett-Packard Development Company, L.P.
- *
- * Copyright (C) 2009 Eric Paris <Red Hat Inc>
- * inotify was largely rewriten to make use of the fsnotify infrastructure
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2, or (at your option) any
- * later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- */
-
-#include <linux/dcache.h> /* d_unlinked */
-#include <linux/fs.h> /* struct inode */
-#include <linux/fsnotify_backend.h>
-#include <linux/inotify.h>
-#include <linux/path.h> /* struct path */
-#include <linux/slab.h> /* kmem_* */
-#include <linux/types.h>
-#include <linux/sched.h>
-
-#include "inotify.h"
-
-/*
- * Check if 2 events contain the same information. We do not compare private data
- * but at this moment that isn't a problem for any know fsnotify listeners.
- */
-static bool event_compare(struct fsnotify_event *old, struct fsnotify_event *new)
-{
- if ((old->mask == new->mask) &&
- (old->to_tell == new->to_tell) &&
- (old->data_type == new->data_type) &&
- (old->name_len == new->name_len)) {
- switch (old->data_type) {
- case (FSNOTIFY_EVENT_INODE):
- /* remember, after old was put on the wait_q we aren't
- * allowed to look at the inode any more, only thing
- * left to check was if the file_name is the same */
- if (!old->name_len ||
- !strcmp(old->file_name, new->file_name))
- return true;
- break;
- case (FSNOTIFY_EVENT_PATH):
- if ((old->path.mnt == new->path.mnt) &&
- (old->path.dentry == new->path.dentry))
- return true;
- break;
- case (FSNOTIFY_EVENT_NONE):
- if (old->mask & FS_Q_OVERFLOW)
- return true;
- else if (old->mask & FS_IN_IGNORED)
- return false;
- return true;
- };
- }
- return false;
-}
-
-static struct fsnotify_event *inotify_merge(struct list_head *list,
- struct fsnotify_event *event)
-{
- struct fsnotify_event_holder *last_holder;
- struct fsnotify_event *last_event;
-
- /* and the list better be locked by something too */
- spin_lock(&event->lock);
-
- last_holder = list_entry(list->prev, struct fsnotify_event_holder, event_list);
- last_event = last_holder->event;
- if (event_compare(last_event, event))
- fsnotify_get_event(last_event);
- else
- last_event = NULL;
-
- spin_unlock(&event->lock);
-
- return last_event;
-}
-
-static int inotify_handle_event(struct fsnotify_group *group,
- struct fsnotify_mark *inode_mark,
- struct fsnotify_mark *vfsmount_mark,
- struct fsnotify_event *event)
-{
- struct inotify_inode_mark *i_mark;
- struct inode *to_tell;
- struct inotify_event_private_data *event_priv;
- struct fsnotify_event_private_data *fsn_event_priv;
- struct fsnotify_event *added_event;
- int wd, ret = 0;
-
- BUG_ON(vfsmount_mark);
-
- pr_debug("%s: group=%p event=%p to_tell=%p mask=%x\n", __func__, group,
- event, event->to_tell, event->mask);
-
- to_tell = event->to_tell;
-
- i_mark = container_of(inode_mark, struct inotify_inode_mark,
- fsn_mark);
- wd = i_mark->wd;
-
- event_priv = kmem_cache_alloc(event_priv_cachep, GFP_KERNEL);
- if (unlikely(!event_priv))
- return -ENOMEM;
-
- fsn_event_priv = &event_priv->fsnotify_event_priv_data;
-
- fsn_event_priv->group = group;
- event_priv->wd = wd;
-
- added_event = fsnotify_add_notify_event(group, event, fsn_event_priv, inotify_merge);
- if (added_event) {
- inotify_free_event_priv(fsn_event_priv);
- if (!IS_ERR(added_event))
- fsnotify_put_event(added_event);
- else
- ret = PTR_ERR(added_event);
- }
-
- if (inode_mark->mask & IN_ONESHOT)
- fsnotify_destroy_mark(inode_mark);
-
- return ret;
-}
-
-static void inotify_freeing_mark(struct fsnotify_mark *fsn_mark, struct fsnotify_group *group)
-{
- inotify_ignored_and_remove_idr(fsn_mark, group);
-}
-
-static bool inotify_should_send_event(struct fsnotify_group *group, struct inode *inode,
- struct fsnotify_mark *inode_mark,
- struct fsnotify_mark *vfsmount_mark,
- __u32 mask, void *data, int data_type)
-{
- if ((inode_mark->mask & FS_EXCL_UNLINK) &&
- (data_type == FSNOTIFY_EVENT_PATH)) {
- struct path *path = data;
-
- if (d_unlinked(path->dentry))
- return false;
- }
-
- return true;
-}
-
-/*
- * This is NEVER supposed to be called. Inotify marks should either have been
- * removed from the idr when the watch was removed or in the
- * fsnotify_destroy_mark_by_group() call when the inotify instance was being
- * torn down. This is only called if the idr is about to be freed but there
- * are still marks in it.
- */
-static int idr_callback(int id, void *p, void *data)
-{
- struct fsnotify_mark *fsn_mark;
- struct inotify_inode_mark *i_mark;
- static bool warned = false;
-
- if (warned)
- return 0;
-
- warned = true;
- fsn_mark = p;
- i_mark = container_of(fsn_mark, struct inotify_inode_mark, fsn_mark);
-
- WARN(1, "inotify closing but id=%d for fsn_mark=%p in group=%p still in "
- "idr. Probably leaking memory\n", id, p, data);
-
- /*
- * I'm taking the liberty of assuming that the mark in question is a
- * valid address and I'm dereferencing it. This might help to figure
- * out why we got here and the panic is no worse than the original
- * BUG() that was here.
- */
- if (fsn_mark)
- printk(KERN_WARNING "fsn_mark->group=%p inode=%p wd=%d\n",
- fsn_mark->group, fsn_mark->i.inode, i_mark->wd);
- return 0;
-}
-
-static void inotify_free_group_priv(struct fsnotify_group *group)
-{
- /* ideally the idr is empty and we won't hit the BUG in the callback */
- idr_for_each(&group->inotify_data.idr, idr_callback, group);
- idr_remove_all(&group->inotify_data.idr);
- idr_destroy(&group->inotify_data.idr);
- atomic_dec(&group->inotify_data.user->inotify_devs);
- free_uid(group->inotify_data.user);
-}
-
-void inotify_free_event_priv(struct fsnotify_event_private_data *fsn_event_priv)
-{
- struct inotify_event_private_data *event_priv;
-
-
- event_priv = container_of(fsn_event_priv, struct inotify_event_private_data,
- fsnotify_event_priv_data);
-
- kmem_cache_free(event_priv_cachep, event_priv);
-}
-
-const struct fsnotify_ops inotify_fsnotify_ops = {
- .handle_event = inotify_handle_event,
- .should_send_event = inotify_should_send_event,
- .free_group_priv = inotify_free_group_priv,
- .free_event_priv = inotify_free_event_priv,
- .freeing_mark = inotify_freeing_mark,
-};
diff --git a/ANDROID_3.4.5/fs/notify/inotify/inotify_user.c b/ANDROID_3.4.5/fs/notify/inotify/inotify_user.c
deleted file mode 100644
index 8445fbc8..00000000
--- a/ANDROID_3.4.5/fs/notify/inotify/inotify_user.c
+++ /dev/null
@@ -1,867 +0,0 @@
-/*
- * fs/inotify_user.c - inotify support for userspace
- *
- * Authors:
- * John McCutchan <ttb@tentacle.dhs.org>
- * Robert Love <rml@novell.com>
- *
- * Copyright (C) 2005 John McCutchan
- * Copyright 2006 Hewlett-Packard Development Company, L.P.
- *
- * Copyright (C) 2009 Eric Paris <Red Hat Inc>
- * inotify was largely rewriten to make use of the fsnotify infrastructure
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2, or (at your option) any
- * later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- */
-
-#include <linux/file.h>
-#include <linux/fs.h> /* struct inode */
-#include <linux/fsnotify_backend.h>
-#include <linux/idr.h>
-#include <linux/init.h> /* module_init */
-#include <linux/inotify.h>
-#include <linux/kernel.h> /* roundup() */
-#include <linux/namei.h> /* LOOKUP_FOLLOW */
-#include <linux/sched.h> /* struct user */
-#include <linux/slab.h> /* struct kmem_cache */
-#include <linux/syscalls.h>
-#include <linux/types.h>
-#include <linux/anon_inodes.h>
-#include <linux/uaccess.h>
-#include <linux/poll.h>
-#include <linux/wait.h>
-
-#include "inotify.h"
-
-#include <asm/ioctls.h>
-
-/* these are configurable via /proc/sys/fs/inotify/ */
-static int inotify_max_user_instances __read_mostly;
-static int inotify_max_queued_events __read_mostly;
-static int inotify_max_user_watches __read_mostly;
-
-static struct kmem_cache *inotify_inode_mark_cachep __read_mostly;
-struct kmem_cache *event_priv_cachep __read_mostly;
-
-#ifdef CONFIG_SYSCTL
-
-#include <linux/sysctl.h>
-
-static int zero;
-
-ctl_table inotify_table[] = {
- {
- .procname = "max_user_instances",
- .data = &inotify_max_user_instances,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &zero,
- },
- {
- .procname = "max_user_watches",
- .data = &inotify_max_user_watches,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &zero,
- },
- {
- .procname = "max_queued_events",
- .data = &inotify_max_queued_events,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &zero
- },
- { }
-};
-#endif /* CONFIG_SYSCTL */
-
-static inline __u32 inotify_arg_to_mask(u32 arg)
-{
- __u32 mask;
-
- /*
- * everything should accept their own ignored, cares about children,
- * and should receive events when the inode is unmounted
- */
- mask = (FS_IN_IGNORED | FS_EVENT_ON_CHILD | FS_UNMOUNT);
-
- /* mask off the flags used to open the fd */
- mask |= (arg & (IN_ALL_EVENTS | IN_ONESHOT | IN_EXCL_UNLINK));
-
- return mask;
-}
-
-static inline u32 inotify_mask_to_arg(__u32 mask)
-{
- return mask & (IN_ALL_EVENTS | IN_ISDIR | IN_UNMOUNT | IN_IGNORED |
- IN_Q_OVERFLOW);
-}
-
-/* intofiy userspace file descriptor functions */
-static unsigned int inotify_poll(struct file *file, poll_table *wait)
-{
- struct fsnotify_group *group = file->private_data;
- int ret = 0;
-
- poll_wait(file, &group->notification_waitq, wait);
- mutex_lock(&group->notification_mutex);
- if (!fsnotify_notify_queue_is_empty(group))
- ret = POLLIN | POLLRDNORM;
- mutex_unlock(&group->notification_mutex);
-
- return ret;
-}
-
-/*
- * Get an inotify_kernel_event if one exists and is small
- * enough to fit in "count". Return an error pointer if
- * not large enough.
- *
- * Called with the group->notification_mutex held.
- */
-static struct fsnotify_event *get_one_event(struct fsnotify_group *group,
- size_t count)
-{
- size_t event_size = sizeof(struct inotify_event);
- struct fsnotify_event *event;
-
- if (fsnotify_notify_queue_is_empty(group))
- return NULL;
-
- event = fsnotify_peek_notify_event(group);
-
- pr_debug("%s: group=%p event=%p\n", __func__, group, event);
-
- if (event->name_len)
- event_size += roundup(event->name_len + 1, event_size);
-
- if (event_size > count)
- return ERR_PTR(-EINVAL);
-
- /* held the notification_mutex the whole time, so this is the
- * same event we peeked above */
- fsnotify_remove_notify_event(group);
-
- return event;
-}
-
-/*
- * Copy an event to user space, returning how much we copied.
- *
- * We already checked that the event size is smaller than the
- * buffer we had in "get_one_event()" above.
- */
-static ssize_t copy_event_to_user(struct fsnotify_group *group,
- struct fsnotify_event *event,
- char __user *buf)
-{
- struct inotify_event inotify_event;
- struct fsnotify_event_private_data *fsn_priv;
- struct inotify_event_private_data *priv;
- size_t event_size = sizeof(struct inotify_event);
- size_t name_len = 0;
-
- pr_debug("%s: group=%p event=%p\n", __func__, group, event);
-
- /* we get the inotify watch descriptor from the event private data */
- spin_lock(&event->lock);
- fsn_priv = fsnotify_remove_priv_from_event(group, event);
- spin_unlock(&event->lock);
-
- if (!fsn_priv)
- inotify_event.wd = -1;
- else {
- priv = container_of(fsn_priv, struct inotify_event_private_data,
- fsnotify_event_priv_data);
- inotify_event.wd = priv->wd;
- inotify_free_event_priv(fsn_priv);
- }
-
- /*
- * round up event->name_len so it is a multiple of event_size
- * plus an extra byte for the terminating '\0'.
- */
- if (event->name_len)
- name_len = roundup(event->name_len + 1, event_size);
- inotify_event.len = name_len;
-
- inotify_event.mask = inotify_mask_to_arg(event->mask);
- inotify_event.cookie = event->sync_cookie;
-
- /* send the main event */
- if (copy_to_user(buf, &inotify_event, event_size))
- return -EFAULT;
-
- buf += event_size;
-
- /*
- * fsnotify only stores the pathname, so here we have to send the pathname
- * and then pad that pathname out to a multiple of sizeof(inotify_event)
- * with zeros. I get my zeros from the nul_inotify_event.
- */
- if (name_len) {
- unsigned int len_to_zero = name_len - event->name_len;
- /* copy the path name */
- if (copy_to_user(buf, event->file_name, event->name_len))
- return -EFAULT;
- buf += event->name_len;
-
- /* fill userspace with 0's */
- if (clear_user(buf, len_to_zero))
- return -EFAULT;
- buf += len_to_zero;
- event_size += name_len;
- }
-
- return event_size;
-}
-
-static ssize_t inotify_read(struct file *file, char __user *buf,
- size_t count, loff_t *pos)
-{
- struct fsnotify_group *group;
- struct fsnotify_event *kevent;
- char __user *start;
- int ret;
- DEFINE_WAIT(wait);
-
- start = buf;
- group = file->private_data;
-
- while (1) {
- prepare_to_wait(&group->notification_waitq, &wait, TASK_INTERRUPTIBLE);
-
- mutex_lock(&group->notification_mutex);
- kevent = get_one_event(group, count);
- mutex_unlock(&group->notification_mutex);
-
- pr_debug("%s: group=%p kevent=%p\n", __func__, group, kevent);
-
- if (kevent) {
- ret = PTR_ERR(kevent);
- if (IS_ERR(kevent))
- break;
- ret = copy_event_to_user(group, kevent, buf);
- fsnotify_put_event(kevent);
- if (ret < 0)
- break;
- buf += ret;
- count -= ret;
- continue;
- }
-
- ret = -EAGAIN;
- if (file->f_flags & O_NONBLOCK)
- break;
- ret = -EINTR;
- if (signal_pending(current))
- break;
-
- if (start != buf)
- break;
-
- schedule();
- }
-
- finish_wait(&group->notification_waitq, &wait);
- if (start != buf && ret != -EFAULT)
- ret = buf - start;
- return ret;
-}
-
-static int inotify_fasync(int fd, struct file *file, int on)
-{
- struct fsnotify_group *group = file->private_data;
-
- return fasync_helper(fd, file, on, &group->inotify_data.fa) >= 0 ? 0 : -EIO;
-}
-
-static int inotify_release(struct inode *ignored, struct file *file)
-{
- struct fsnotify_group *group = file->private_data;
-
- pr_debug("%s: group=%p\n", __func__, group);
-
- fsnotify_clear_marks_by_group(group);
-
- /* free this group, matching get was inotify_init->fsnotify_obtain_group */
- fsnotify_put_group(group);
-
- return 0;
-}
-
-static long inotify_ioctl(struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- struct fsnotify_group *group;
- struct fsnotify_event_holder *holder;
- struct fsnotify_event *event;
- void __user *p;
- int ret = -ENOTTY;
- size_t send_len = 0;
-
- group = file->private_data;
- p = (void __user *) arg;
-
- pr_debug("%s: group=%p cmd=%u\n", __func__, group, cmd);
-
- switch (cmd) {
- case FIONREAD:
- mutex_lock(&group->notification_mutex);
- list_for_each_entry(holder, &group->notification_list, event_list) {
- event = holder->event;
- send_len += sizeof(struct inotify_event);
- if (event->name_len)
- send_len += roundup(event->name_len + 1,
- sizeof(struct inotify_event));
- }
- mutex_unlock(&group->notification_mutex);
- ret = put_user(send_len, (int __user *) p);
- break;
- }
-
- return ret;
-}
-
-static const struct file_operations inotify_fops = {
- .poll = inotify_poll,
- .read = inotify_read,
- .fasync = inotify_fasync,
- .release = inotify_release,
- .unlocked_ioctl = inotify_ioctl,
- .compat_ioctl = inotify_ioctl,
- .llseek = noop_llseek,
-};
-
-
-/*
- * find_inode - resolve a user-given path to a specific inode
- */
-static int inotify_find_inode(const char __user *dirname, struct path *path, unsigned flags)
-{
- int error;
-
- error = user_path_at(AT_FDCWD, dirname, flags, path);
- if (error)
- return error;
- /* you can only watch an inode if you have read permissions on it */
- error = inode_permission(path->dentry->d_inode, MAY_READ);
- if (error)
- path_put(path);
- return error;
-}
-
-static int inotify_add_to_idr(struct idr *idr, spinlock_t *idr_lock,
- int *last_wd,
- struct inotify_inode_mark *i_mark)
-{
- int ret;
-
- do {
- if (unlikely(!idr_pre_get(idr, GFP_KERNEL)))
- return -ENOMEM;
-
- spin_lock(idr_lock);
- ret = idr_get_new_above(idr, i_mark, *last_wd + 1,
- &i_mark->wd);
- /* we added the mark to the idr, take a reference */
- if (!ret) {
- *last_wd = i_mark->wd;
- fsnotify_get_mark(&i_mark->fsn_mark);
- }
- spin_unlock(idr_lock);
- } while (ret == -EAGAIN);
-
- return ret;
-}
-
-static struct inotify_inode_mark *inotify_idr_find_locked(struct fsnotify_group *group,
- int wd)
-{
- struct idr *idr = &group->inotify_data.idr;
- spinlock_t *idr_lock = &group->inotify_data.idr_lock;
- struct inotify_inode_mark *i_mark;
-
- assert_spin_locked(idr_lock);
-
- i_mark = idr_find(idr, wd);
- if (i_mark) {
- struct fsnotify_mark *fsn_mark = &i_mark->fsn_mark;
-
- fsnotify_get_mark(fsn_mark);
- /* One ref for being in the idr, one ref we just took */
- BUG_ON(atomic_read(&fsn_mark->refcnt) < 2);
- }
-
- return i_mark;
-}
-
-static struct inotify_inode_mark *inotify_idr_find(struct fsnotify_group *group,
- int wd)
-{
- struct inotify_inode_mark *i_mark;
- spinlock_t *idr_lock = &group->inotify_data.idr_lock;
-
- spin_lock(idr_lock);
- i_mark = inotify_idr_find_locked(group, wd);
- spin_unlock(idr_lock);
-
- return i_mark;
-}
-
-static void do_inotify_remove_from_idr(struct fsnotify_group *group,
- struct inotify_inode_mark *i_mark)
-{
- struct idr *idr = &group->inotify_data.idr;
- spinlock_t *idr_lock = &group->inotify_data.idr_lock;
- int wd = i_mark->wd;
-
- assert_spin_locked(idr_lock);
-
- idr_remove(idr, wd);
-
- /* removed from the idr, drop that ref */
- fsnotify_put_mark(&i_mark->fsn_mark);
-}
-
-/*
- * Remove the mark from the idr (if present) and drop the reference
- * on the mark because it was in the idr.
- */
-static void inotify_remove_from_idr(struct fsnotify_group *group,
- struct inotify_inode_mark *i_mark)
-{
- spinlock_t *idr_lock = &group->inotify_data.idr_lock;
- struct inotify_inode_mark *found_i_mark = NULL;
- int wd;
-
- spin_lock(idr_lock);
- wd = i_mark->wd;
-
- /*
- * does this i_mark think it is in the idr? we shouldn't get called
- * if it wasn't....
- */
- if (wd == -1) {
- WARN_ONCE(1, "%s: i_mark=%p i_mark->wd=%d i_mark->group=%p"
- " i_mark->inode=%p\n", __func__, i_mark, i_mark->wd,
- i_mark->fsn_mark.group, i_mark->fsn_mark.i.inode);
- goto out;
- }
-
- /* Lets look in the idr to see if we find it */
- found_i_mark = inotify_idr_find_locked(group, wd);
- if (unlikely(!found_i_mark)) {
- WARN_ONCE(1, "%s: i_mark=%p i_mark->wd=%d i_mark->group=%p"
- " i_mark->inode=%p\n", __func__, i_mark, i_mark->wd,
- i_mark->fsn_mark.group, i_mark->fsn_mark.i.inode);
- goto out;
- }
-
- /*
- * We found an mark in the idr at the right wd, but it's
- * not the mark we were told to remove. eparis seriously
- * fucked up somewhere.
- */
- if (unlikely(found_i_mark != i_mark)) {
- WARN_ONCE(1, "%s: i_mark=%p i_mark->wd=%d i_mark->group=%p "
- "mark->inode=%p found_i_mark=%p found_i_mark->wd=%d "
- "found_i_mark->group=%p found_i_mark->inode=%p\n",
- __func__, i_mark, i_mark->wd, i_mark->fsn_mark.group,
- i_mark->fsn_mark.i.inode, found_i_mark, found_i_mark->wd,
- found_i_mark->fsn_mark.group,
- found_i_mark->fsn_mark.i.inode);
- goto out;
- }
-
- /*
- * One ref for being in the idr
- * one ref held by the caller trying to kill us
- * one ref grabbed by inotify_idr_find
- */
- if (unlikely(atomic_read(&i_mark->fsn_mark.refcnt) < 3)) {
- printk(KERN_ERR "%s: i_mark=%p i_mark->wd=%d i_mark->group=%p"
- " i_mark->inode=%p\n", __func__, i_mark, i_mark->wd,
- i_mark->fsn_mark.group, i_mark->fsn_mark.i.inode);
- /* we can't really recover with bad ref cnting.. */
- BUG();
- }
-
- do_inotify_remove_from_idr(group, i_mark);
-out:
- /* match the ref taken by inotify_idr_find_locked() */
- if (found_i_mark)
- fsnotify_put_mark(&found_i_mark->fsn_mark);
- i_mark->wd = -1;
- spin_unlock(idr_lock);
-}
-
-/*
- * Send IN_IGNORED for this wd, remove this wd from the idr.
- */
-void inotify_ignored_and_remove_idr(struct fsnotify_mark *fsn_mark,
- struct fsnotify_group *group)
-{
- struct inotify_inode_mark *i_mark;
- struct fsnotify_event *ignored_event, *notify_event;
- struct inotify_event_private_data *event_priv;
- struct fsnotify_event_private_data *fsn_event_priv;
- int ret;
-
- ignored_event = fsnotify_create_event(NULL, FS_IN_IGNORED, NULL,
- FSNOTIFY_EVENT_NONE, NULL, 0,
- GFP_NOFS);
- if (!ignored_event)
- return;
-
- i_mark = container_of(fsn_mark, struct inotify_inode_mark, fsn_mark);
-
- event_priv = kmem_cache_alloc(event_priv_cachep, GFP_NOFS);
- if (unlikely(!event_priv))
- goto skip_send_ignore;
-
- fsn_event_priv = &event_priv->fsnotify_event_priv_data;
-
- fsn_event_priv->group = group;
- event_priv->wd = i_mark->wd;
-
- notify_event = fsnotify_add_notify_event(group, ignored_event, fsn_event_priv, NULL);
- if (notify_event) {
- if (IS_ERR(notify_event))
- ret = PTR_ERR(notify_event);
- else
- fsnotify_put_event(notify_event);
- inotify_free_event_priv(fsn_event_priv);
- }
-
-skip_send_ignore:
-
- /* matches the reference taken when the event was created */
- fsnotify_put_event(ignored_event);
-
- /* remove this mark from the idr */
- inotify_remove_from_idr(group, i_mark);
-
- atomic_dec(&group->inotify_data.user->inotify_watches);
-}
-
-/* ding dong the mark is dead */
-static void inotify_free_mark(struct fsnotify_mark *fsn_mark)
-{
- struct inotify_inode_mark *i_mark;
-
- i_mark = container_of(fsn_mark, struct inotify_inode_mark, fsn_mark);
-
- kmem_cache_free(inotify_inode_mark_cachep, i_mark);
-}
-
-static int inotify_update_existing_watch(struct fsnotify_group *group,
- struct inode *inode,
- u32 arg)
-{
- struct fsnotify_mark *fsn_mark;
- struct inotify_inode_mark *i_mark;
- __u32 old_mask, new_mask;
- __u32 mask;
- int add = (arg & IN_MASK_ADD);
- int ret;
-
- /* don't allow invalid bits: we don't want flags set */
- mask = inotify_arg_to_mask(arg);
- if (unlikely(!(mask & IN_ALL_EVENTS)))
- return -EINVAL;
-
- fsn_mark = fsnotify_find_inode_mark(group, inode);
- if (!fsn_mark)
- return -ENOENT;
-
- i_mark = container_of(fsn_mark, struct inotify_inode_mark, fsn_mark);
-
- spin_lock(&fsn_mark->lock);
-
- old_mask = fsn_mark->mask;
- if (add)
- fsnotify_set_mark_mask_locked(fsn_mark, (fsn_mark->mask | mask));
- else
- fsnotify_set_mark_mask_locked(fsn_mark, mask);
- new_mask = fsn_mark->mask;
-
- spin_unlock(&fsn_mark->lock);
-
- if (old_mask != new_mask) {
- /* more bits in old than in new? */
- int dropped = (old_mask & ~new_mask);
- /* more bits in this fsn_mark than the inode's mask? */
- int do_inode = (new_mask & ~inode->i_fsnotify_mask);
-
- /* update the inode with this new fsn_mark */
- if (dropped || do_inode)
- fsnotify_recalc_inode_mask(inode);
-
- }
-
- /* return the wd */
- ret = i_mark->wd;
-
- /* match the get from fsnotify_find_mark() */
- fsnotify_put_mark(fsn_mark);
-
- return ret;
-}
-
-static int inotify_new_watch(struct fsnotify_group *group,
- struct inode *inode,
- u32 arg)
-{
- struct inotify_inode_mark *tmp_i_mark;
- __u32 mask;
- int ret;
- struct idr *idr = &group->inotify_data.idr;
- spinlock_t *idr_lock = &group->inotify_data.idr_lock;
-
- /* don't allow invalid bits: we don't want flags set */
- mask = inotify_arg_to_mask(arg);
- if (unlikely(!(mask & IN_ALL_EVENTS)))
- return -EINVAL;
-
- tmp_i_mark = kmem_cache_alloc(inotify_inode_mark_cachep, GFP_KERNEL);
- if (unlikely(!tmp_i_mark))
- return -ENOMEM;
-
- fsnotify_init_mark(&tmp_i_mark->fsn_mark, inotify_free_mark);
- tmp_i_mark->fsn_mark.mask = mask;
- tmp_i_mark->wd = -1;
-
- ret = -ENOSPC;
- if (atomic_read(&group->inotify_data.user->inotify_watches) >= inotify_max_user_watches)
- goto out_err;
-
- ret = inotify_add_to_idr(idr, idr_lock, &group->inotify_data.last_wd,
- tmp_i_mark);
- if (ret)
- goto out_err;
-
- /* we are on the idr, now get on the inode */
- ret = fsnotify_add_mark(&tmp_i_mark->fsn_mark, group, inode, NULL, 0);
- if (ret) {
- /* we failed to get on the inode, get off the idr */
- inotify_remove_from_idr(group, tmp_i_mark);
- goto out_err;
- }
-
- /* increment the number of watches the user has */
- atomic_inc(&group->inotify_data.user->inotify_watches);
-
- /* return the watch descriptor for this new mark */
- ret = tmp_i_mark->wd;
-
-out_err:
- /* match the ref from fsnotify_init_mark() */
- fsnotify_put_mark(&tmp_i_mark->fsn_mark);
-
- return ret;
-}
-
-static int inotify_update_watch(struct fsnotify_group *group, struct inode *inode, u32 arg)
-{
- int ret = 0;
-
-retry:
- /* try to update and existing watch with the new arg */
- ret = inotify_update_existing_watch(group, inode, arg);
- /* no mark present, try to add a new one */
- if (ret == -ENOENT)
- ret = inotify_new_watch(group, inode, arg);
- /*
- * inotify_new_watch could race with another thread which did an
- * inotify_new_watch between the update_existing and the add watch
- * here, go back and try to update an existing mark again.
- */
- if (ret == -EEXIST)
- goto retry;
-
- return ret;
-}
-
-static struct fsnotify_group *inotify_new_group(unsigned int max_events)
-{
- struct fsnotify_group *group;
-
- group = fsnotify_alloc_group(&inotify_fsnotify_ops);
- if (IS_ERR(group))
- return group;
-
- group->max_events = max_events;
-
- spin_lock_init(&group->inotify_data.idr_lock);
- idr_init(&group->inotify_data.idr);
- group->inotify_data.last_wd = 0;
- group->inotify_data.fa = NULL;
- group->inotify_data.user = get_current_user();
-
- if (atomic_inc_return(&group->inotify_data.user->inotify_devs) >
- inotify_max_user_instances) {
- fsnotify_put_group(group);
- return ERR_PTR(-EMFILE);
- }
-
- return group;
-}
-
-
-/* inotify syscalls */
-SYSCALL_DEFINE1(inotify_init1, int, flags)
-{
- struct fsnotify_group *group;
- int ret;
-
- /* Check the IN_* constants for consistency. */
- BUILD_BUG_ON(IN_CLOEXEC != O_CLOEXEC);
- BUILD_BUG_ON(IN_NONBLOCK != O_NONBLOCK);
-
- if (flags & ~(IN_CLOEXEC | IN_NONBLOCK))
- return -EINVAL;
-
- /* fsnotify_obtain_group took a reference to group, we put this when we kill the file in the end */
- group = inotify_new_group(inotify_max_queued_events);
- if (IS_ERR(group))
- return PTR_ERR(group);
-
- ret = anon_inode_getfd("inotify", &inotify_fops, group,
- O_RDONLY | flags);
- if (ret < 0)
- fsnotify_put_group(group);
-
- return ret;
-}
-
-SYSCALL_DEFINE0(inotify_init)
-{
- return sys_inotify_init1(0);
-}
-
-SYSCALL_DEFINE3(inotify_add_watch, int, fd, const char __user *, pathname,
- u32, mask)
-{
- struct fsnotify_group *group;
- struct inode *inode;
- struct path path;
- struct file *filp;
- int ret, fput_needed;
- unsigned flags = 0;
-
- filp = fget_light(fd, &fput_needed);
- if (unlikely(!filp))
- return -EBADF;
-
- /* verify that this is indeed an inotify instance */
- if (unlikely(filp->f_op != &inotify_fops)) {
- ret = -EINVAL;
- goto fput_and_out;
- }
-
- if (!(mask & IN_DONT_FOLLOW))
- flags |= LOOKUP_FOLLOW;
- if (mask & IN_ONLYDIR)
- flags |= LOOKUP_DIRECTORY;
-
- ret = inotify_find_inode(pathname, &path, flags);
- if (ret)
- goto fput_and_out;
-
- /* inode held in place by reference to path; group by fget on fd */
- inode = path.dentry->d_inode;
- group = filp->private_data;
-
- /* create/update an inode mark */
- ret = inotify_update_watch(group, inode, mask);
- path_put(&path);
-fput_and_out:
- fput_light(filp, fput_needed);
- return ret;
-}
-
-SYSCALL_DEFINE2(inotify_rm_watch, int, fd, __s32, wd)
-{
- struct fsnotify_group *group;
- struct inotify_inode_mark *i_mark;
- struct file *filp;
- int ret = 0, fput_needed;
-
- filp = fget_light(fd, &fput_needed);
- if (unlikely(!filp))
- return -EBADF;
-
- /* verify that this is indeed an inotify instance */
- ret = -EINVAL;
- if (unlikely(filp->f_op != &inotify_fops))
- goto out;
-
- group = filp->private_data;
-
- ret = -EINVAL;
- i_mark = inotify_idr_find(group, wd);
- if (unlikely(!i_mark))
- goto out;
-
- ret = 0;
-
- fsnotify_destroy_mark(&i_mark->fsn_mark);
-
- /* match ref taken by inotify_idr_find */
- fsnotify_put_mark(&i_mark->fsn_mark);
-
-out:
- fput_light(filp, fput_needed);
- return ret;
-}
-
-/*
- * inotify_user_setup - Our initialization function. Note that we cannot return
- * error because we have compiled-in VFS hooks. So an (unlikely) failure here
- * must result in panic().
- */
-static int __init inotify_user_setup(void)
-{
- BUILD_BUG_ON(IN_ACCESS != FS_ACCESS);
- BUILD_BUG_ON(IN_MODIFY != FS_MODIFY);
- BUILD_BUG_ON(IN_ATTRIB != FS_ATTRIB);
- BUILD_BUG_ON(IN_CLOSE_WRITE != FS_CLOSE_WRITE);
- BUILD_BUG_ON(IN_CLOSE_NOWRITE != FS_CLOSE_NOWRITE);
- BUILD_BUG_ON(IN_OPEN != FS_OPEN);
- BUILD_BUG_ON(IN_MOVED_FROM != FS_MOVED_FROM);
- BUILD_BUG_ON(IN_MOVED_TO != FS_MOVED_TO);
- BUILD_BUG_ON(IN_CREATE != FS_CREATE);
- BUILD_BUG_ON(IN_DELETE != FS_DELETE);
- BUILD_BUG_ON(IN_DELETE_SELF != FS_DELETE_SELF);
- BUILD_BUG_ON(IN_MOVE_SELF != FS_MOVE_SELF);
- BUILD_BUG_ON(IN_UNMOUNT != FS_UNMOUNT);
- BUILD_BUG_ON(IN_Q_OVERFLOW != FS_Q_OVERFLOW);
- BUILD_BUG_ON(IN_IGNORED != FS_IN_IGNORED);
- BUILD_BUG_ON(IN_EXCL_UNLINK != FS_EXCL_UNLINK);
- BUILD_BUG_ON(IN_ISDIR != FS_ISDIR);
- BUILD_BUG_ON(IN_ONESHOT != FS_IN_ONESHOT);
-
- BUG_ON(hweight32(ALL_INOTIFY_BITS) != 21);
-
- inotify_inode_mark_cachep = KMEM_CACHE(inotify_inode_mark, SLAB_PANIC);
- event_priv_cachep = KMEM_CACHE(inotify_event_private_data, SLAB_PANIC);
-
- inotify_max_queued_events = 16384;
- inotify_max_user_instances = 128;
- inotify_max_user_watches = 8192;
-
- return 0;
-}
-module_init(inotify_user_setup);
diff --git a/ANDROID_3.4.5/fs/notify/mark.c b/ANDROID_3.4.5/fs/notify/mark.c
deleted file mode 100644
index f104d565..00000000
--- a/ANDROID_3.4.5/fs/notify/mark.c
+++ /dev/null
@@ -1,372 +0,0 @@
-/*
- * Copyright (C) 2008 Red Hat, Inc., Eric Paris <eparis@redhat.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; see the file COPYING. If not, write to
- * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-/*
- * fsnotify inode mark locking/lifetime/and refcnting
- *
- * REFCNT:
- * The mark->refcnt tells how many "things" in the kernel currently are
- * referencing this object. The object typically will live inside the kernel
- * with a refcnt of 2, one for each list it is on (i_list, g_list). Any task
- * which can find this object holding the appropriete locks, can take a reference
- * and the object itself is guaranteed to survive until the reference is dropped.
- *
- * LOCKING:
- * There are 3 spinlocks involved with fsnotify inode marks and they MUST
- * be taken in order as follows:
- *
- * mark->lock
- * group->mark_lock
- * inode->i_lock
- *
- * mark->lock protects 2 things, mark->group and mark->inode. You must hold
- * that lock to dereference either of these things (they could be NULL even with
- * the lock)
- *
- * group->mark_lock protects the marks_list anchored inside a given group
- * and each mark is hooked via the g_list. It also sorta protects the
- * free_g_list, which when used is anchored by a private list on the stack of the
- * task which held the group->mark_lock.
- *
- * inode->i_lock protects the i_fsnotify_marks list anchored inside a
- * given inode and each mark is hooked via the i_list. (and sorta the
- * free_i_list)
- *
- *
- * LIFETIME:
- * Inode marks survive between when they are added to an inode and when their
- * refcnt==0.
- *
- * The inode mark can be cleared for a number of different reasons including:
- * - The inode is unlinked for the last time. (fsnotify_inode_remove)
- * - The inode is being evicted from cache. (fsnotify_inode_delete)
- * - The fs the inode is on is unmounted. (fsnotify_inode_delete/fsnotify_unmount_inodes)
- * - Something explicitly requests that it be removed. (fsnotify_destroy_mark)
- * - The fsnotify_group associated with the mark is going away and all such marks
- * need to be cleaned up. (fsnotify_clear_marks_by_group)
- *
- * Worst case we are given an inode and need to clean up all the marks on that
- * inode. We take i_lock and walk the i_fsnotify_marks safely. For each
- * mark on the list we take a reference (so the mark can't disappear under us).
- * We remove that mark form the inode's list of marks and we add this mark to a
- * private list anchored on the stack using i_free_list; At this point we no
- * longer fear anything finding the mark using the inode's list of marks.
- *
- * We can safely and locklessly run the private list on the stack of everything
- * we just unattached from the original inode. For each mark on the private list
- * we grab the mark-> and can thus dereference mark->group and mark->inode. If
- * we see the group and inode are not NULL we take those locks. Now holding all
- * 3 locks we can completely remove the mark from other tasks finding it in the
- * future. Remember, 10 things might already be referencing this mark, but they
- * better be holding a ref. We drop our reference we took before we unhooked it
- * from the inode. When the ref hits 0 we can free the mark.
- *
- * Very similarly for freeing by group, except we use free_g_list.
- *
- * This has the very interesting property of being able to run concurrently with
- * any (or all) other directions.
- */
-
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/kthread.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/srcu.h>
-
-#include <linux/atomic.h>
-
-#include <linux/fsnotify_backend.h>
-#include "fsnotify.h"
-
-struct srcu_struct fsnotify_mark_srcu;
-static DEFINE_SPINLOCK(destroy_lock);
-static LIST_HEAD(destroy_list);
-static DECLARE_WAIT_QUEUE_HEAD(destroy_waitq);
-
-void fsnotify_get_mark(struct fsnotify_mark *mark)
-{
- atomic_inc(&mark->refcnt);
-}
-
-void fsnotify_put_mark(struct fsnotify_mark *mark)
-{
- if (atomic_dec_and_test(&mark->refcnt))
- mark->free_mark(mark);
-}
-
-/*
- * Any time a mark is getting freed we end up here.
- * The caller had better be holding a reference to this mark so we don't actually
- * do the final put under the mark->lock
- */
-void fsnotify_destroy_mark(struct fsnotify_mark *mark)
-{
- struct fsnotify_group *group;
- struct inode *inode = NULL;
-
- spin_lock(&mark->lock);
-
- group = mark->group;
-
- /* something else already called this function on this mark */
- if (!(mark->flags & FSNOTIFY_MARK_FLAG_ALIVE)) {
- spin_unlock(&mark->lock);
- return;
- }
-
- mark->flags &= ~FSNOTIFY_MARK_FLAG_ALIVE;
-
- spin_lock(&group->mark_lock);
-
- if (mark->flags & FSNOTIFY_MARK_FLAG_INODE) {
- inode = mark->i.inode;
- fsnotify_destroy_inode_mark(mark);
- } else if (mark->flags & FSNOTIFY_MARK_FLAG_VFSMOUNT)
- fsnotify_destroy_vfsmount_mark(mark);
- else
- BUG();
-
- list_del_init(&mark->g_list);
-
- spin_unlock(&group->mark_lock);
- spin_unlock(&mark->lock);
-
- spin_lock(&destroy_lock);
- list_add(&mark->destroy_list, &destroy_list);
- spin_unlock(&destroy_lock);
- wake_up(&destroy_waitq);
-
- /*
- * Some groups like to know that marks are being freed. This is a
- * callback to the group function to let it know that this mark
- * is being freed.
- */
- if (group->ops->freeing_mark)
- group->ops->freeing_mark(mark, group);
-
- /*
- * __fsnotify_update_child_dentry_flags(inode);
- *
- * I really want to call that, but we can't, we have no idea if the inode
- * still exists the second we drop the mark->lock.
- *
- * The next time an event arrive to this inode from one of it's children
- * __fsnotify_parent will see that the inode doesn't care about it's
- * children and will update all of these flags then. So really this
- * is just a lazy update (and could be a perf win...)
- */
-
- if (inode && (mark->flags & FSNOTIFY_MARK_FLAG_OBJECT_PINNED))
- iput(inode);
-
- /*
- * We don't necessarily have a ref on mark from caller so the above iput
- * may have already destroyed it. Don't touch from now on.
- */
-
- /*
- * it's possible that this group tried to destroy itself, but this
- * this mark was simultaneously being freed by inode. If that's the
- * case, we finish freeing the group here.
- */
- if (unlikely(atomic_dec_and_test(&group->num_marks)))
- fsnotify_final_destroy_group(group);
-}
-
-void fsnotify_set_mark_mask_locked(struct fsnotify_mark *mark, __u32 mask)
-{
- assert_spin_locked(&mark->lock);
-
- mark->mask = mask;
-
- if (mark->flags & FSNOTIFY_MARK_FLAG_INODE)
- fsnotify_set_inode_mark_mask_locked(mark, mask);
-}
-
-void fsnotify_set_mark_ignored_mask_locked(struct fsnotify_mark *mark, __u32 mask)
-{
- assert_spin_locked(&mark->lock);
-
- mark->ignored_mask = mask;
-}
-
-/*
- * Attach an initialized mark to a given group and fs object.
- * These marks may be used for the fsnotify backend to determine which
- * event types should be delivered to which group.
- */
-int fsnotify_add_mark(struct fsnotify_mark *mark,
- struct fsnotify_group *group, struct inode *inode,
- struct vfsmount *mnt, int allow_dups)
-{
- int ret = 0;
-
- BUG_ON(inode && mnt);
- BUG_ON(!inode && !mnt);
-
- /*
- * LOCKING ORDER!!!!
- * mark->lock
- * group->mark_lock
- * inode->i_lock
- */
- spin_lock(&mark->lock);
- spin_lock(&group->mark_lock);
-
- mark->flags |= FSNOTIFY_MARK_FLAG_ALIVE;
-
- mark->group = group;
- list_add(&mark->g_list, &group->marks_list);
- atomic_inc(&group->num_marks);
- fsnotify_get_mark(mark); /* for i_list and g_list */
-
- if (inode) {
- ret = fsnotify_add_inode_mark(mark, group, inode, allow_dups);
- if (ret)
- goto err;
- } else if (mnt) {
- ret = fsnotify_add_vfsmount_mark(mark, group, mnt, allow_dups);
- if (ret)
- goto err;
- } else {
- BUG();
- }
-
- spin_unlock(&group->mark_lock);
-
- /* this will pin the object if appropriate */
- fsnotify_set_mark_mask_locked(mark, mark->mask);
-
- spin_unlock(&mark->lock);
-
- if (inode)
- __fsnotify_update_child_dentry_flags(inode);
-
- return ret;
-err:
- mark->flags &= ~FSNOTIFY_MARK_FLAG_ALIVE;
- list_del_init(&mark->g_list);
- mark->group = NULL;
- atomic_dec(&group->num_marks);
-
- spin_unlock(&group->mark_lock);
- spin_unlock(&mark->lock);
-
- spin_lock(&destroy_lock);
- list_add(&mark->destroy_list, &destroy_list);
- spin_unlock(&destroy_lock);
- wake_up(&destroy_waitq);
-
- return ret;
-}
-
-/*
- * clear any marks in a group in which mark->flags & flags is true
- */
-void fsnotify_clear_marks_by_group_flags(struct fsnotify_group *group,
- unsigned int flags)
-{
- struct fsnotify_mark *lmark, *mark;
- LIST_HEAD(free_list);
-
- spin_lock(&group->mark_lock);
- list_for_each_entry_safe(mark, lmark, &group->marks_list, g_list) {
- if (mark->flags & flags) {
- list_add(&mark->free_g_list, &free_list);
- list_del_init(&mark->g_list);
- fsnotify_get_mark(mark);
- }
- }
- spin_unlock(&group->mark_lock);
-
- list_for_each_entry_safe(mark, lmark, &free_list, free_g_list) {
- fsnotify_destroy_mark(mark);
- fsnotify_put_mark(mark);
- }
-}
-
-/*
- * Given a group, destroy all of the marks associated with that group.
- */
-void fsnotify_clear_marks_by_group(struct fsnotify_group *group)
-{
- fsnotify_clear_marks_by_group_flags(group, (unsigned int)-1);
-}
-
-void fsnotify_duplicate_mark(struct fsnotify_mark *new, struct fsnotify_mark *old)
-{
- assert_spin_locked(&old->lock);
- new->i.inode = old->i.inode;
- new->m.mnt = old->m.mnt;
- new->group = old->group;
- new->mask = old->mask;
- new->free_mark = old->free_mark;
-}
-
-/*
- * Nothing fancy, just initialize lists and locks and counters.
- */
-void fsnotify_init_mark(struct fsnotify_mark *mark,
- void (*free_mark)(struct fsnotify_mark *mark))
-{
- memset(mark, 0, sizeof(*mark));
- spin_lock_init(&mark->lock);
- atomic_set(&mark->refcnt, 1);
- mark->free_mark = free_mark;
-}
-
-static int fsnotify_mark_destroy(void *ignored)
-{
- struct fsnotify_mark *mark, *next;
- LIST_HEAD(private_destroy_list);
-
- for (;;) {
- spin_lock(&destroy_lock);
- /* exchange the list head */
- list_replace_init(&destroy_list, &private_destroy_list);
- spin_unlock(&destroy_lock);
-
- synchronize_srcu(&fsnotify_mark_srcu);
-
- list_for_each_entry_safe(mark, next, &private_destroy_list, destroy_list) {
- list_del_init(&mark->destroy_list);
- fsnotify_put_mark(mark);
- }
-
- wait_event_interruptible(destroy_waitq, !list_empty(&destroy_list));
- }
-
- return 0;
-}
-
-static int __init fsnotify_mark_init(void)
-{
- struct task_struct *thread;
-
- thread = kthread_run(fsnotify_mark_destroy, NULL,
- "fsnotify_mark");
- if (IS_ERR(thread))
- panic("unable to start fsnotify mark destruction thread.");
-
- return 0;
-}
-device_initcall(fsnotify_mark_init);
diff --git a/ANDROID_3.4.5/fs/notify/notification.c b/ANDROID_3.4.5/fs/notify/notification.c
deleted file mode 100644
index c887b137..00000000
--- a/ANDROID_3.4.5/fs/notify/notification.c
+++ /dev/null
@@ -1,463 +0,0 @@
-/*
- * Copyright (C) 2008 Red Hat, Inc., Eric Paris <eparis@redhat.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; see the file COPYING. If not, write to
- * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-/*
- * Basic idea behind the notification queue: An fsnotify group (like inotify)
- * sends the userspace notification about events asyncronously some time after
- * the event happened. When inotify gets an event it will need to add that
- * event to the group notify queue. Since a single event might need to be on
- * multiple group's notification queues we can't add the event directly to each
- * queue and instead add a small "event_holder" to each queue. This event_holder
- * has a pointer back to the original event. Since the majority of events are
- * going to end up on one, and only one, notification queue we embed one
- * event_holder into each event. This means we have a single allocation instead
- * of always needing two. If the embedded event_holder is already in use by
- * another group a new event_holder (from fsnotify_event_holder_cachep) will be
- * allocated and used.
- */
-
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/list.h>
-#include <linux/module.h>
-#include <linux/mount.h>
-#include <linux/mutex.h>
-#include <linux/namei.h>
-#include <linux/path.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-
-#include <linux/atomic.h>
-
-#include <linux/fsnotify_backend.h>
-#include "fsnotify.h"
-
-static struct kmem_cache *fsnotify_event_cachep;
-static struct kmem_cache *fsnotify_event_holder_cachep;
-/*
- * This is a magic event we send when the q is too full. Since it doesn't
- * hold real event information we just keep one system wide and use it any time
- * it is needed. It's refcnt is set 1 at kernel init time and will never
- * get set to 0 so it will never get 'freed'
- */
-static struct fsnotify_event *q_overflow_event;
-static atomic_t fsnotify_sync_cookie = ATOMIC_INIT(0);
-
-/**
- * fsnotify_get_cookie - return a unique cookie for use in synchronizing events.
- * Called from fsnotify_move, which is inlined into filesystem modules.
- */
-u32 fsnotify_get_cookie(void)
-{
- return atomic_inc_return(&fsnotify_sync_cookie);
-}
-EXPORT_SYMBOL_GPL(fsnotify_get_cookie);
-
-/* return true if the notify queue is empty, false otherwise */
-bool fsnotify_notify_queue_is_empty(struct fsnotify_group *group)
-{
- BUG_ON(!mutex_is_locked(&group->notification_mutex));
- return list_empty(&group->notification_list) ? true : false;
-}
-
-void fsnotify_get_event(struct fsnotify_event *event)
-{
- atomic_inc(&event->refcnt);
-}
-
-void fsnotify_put_event(struct fsnotify_event *event)
-{
- if (!event)
- return;
-
- if (atomic_dec_and_test(&event->refcnt)) {
- pr_debug("%s: event=%p\n", __func__, event);
-
- if (event->data_type == FSNOTIFY_EVENT_PATH)
- path_put(&event->path);
-
- BUG_ON(!list_empty(&event->private_data_list));
-
- kfree(event->file_name);
- put_pid(event->tgid);
- kmem_cache_free(fsnotify_event_cachep, event);
- }
-}
-
-struct fsnotify_event_holder *fsnotify_alloc_event_holder(void)
-{
- return kmem_cache_alloc(fsnotify_event_holder_cachep, GFP_KERNEL);
-}
-
-void fsnotify_destroy_event_holder(struct fsnotify_event_holder *holder)
-{
- if (holder)
- kmem_cache_free(fsnotify_event_holder_cachep, holder);
-}
-
-/*
- * Find the private data that the group previously attached to this event when
- * the group added the event to the notification queue (fsnotify_add_notify_event)
- */
-struct fsnotify_event_private_data *fsnotify_remove_priv_from_event(struct fsnotify_group *group, struct fsnotify_event *event)
-{
- struct fsnotify_event_private_data *lpriv;
- struct fsnotify_event_private_data *priv = NULL;
-
- assert_spin_locked(&event->lock);
-
- list_for_each_entry(lpriv, &event->private_data_list, event_list) {
- if (lpriv->group == group) {
- priv = lpriv;
- list_del(&priv->event_list);
- break;
- }
- }
- return priv;
-}
-
-/*
- * Add an event to the group notification queue. The group can later pull this
- * event off the queue to deal with. If the event is successfully added to the
- * group's notification queue, a reference is taken on event.
- */
-struct fsnotify_event *fsnotify_add_notify_event(struct fsnotify_group *group, struct fsnotify_event *event,
- struct fsnotify_event_private_data *priv,
- struct fsnotify_event *(*merge)(struct list_head *,
- struct fsnotify_event *))
-{
- struct fsnotify_event *return_event = NULL;
- struct fsnotify_event_holder *holder = NULL;
- struct list_head *list = &group->notification_list;
-
- pr_debug("%s: group=%p event=%p priv=%p\n", __func__, group, event, priv);
-
- /*
- * There is one fsnotify_event_holder embedded inside each fsnotify_event.
- * Check if we expect to be able to use that holder. If not alloc a new
- * holder.
- * For the overflow event it's possible that something will use the in
- * event holder before we get the lock so we may need to jump back and
- * alloc a new holder, this can't happen for most events...
- */
- if (!list_empty(&event->holder.event_list)) {
-alloc_holder:
- holder = fsnotify_alloc_event_holder();
- if (!holder)
- return ERR_PTR(-ENOMEM);
- }
-
- mutex_lock(&group->notification_mutex);
-
- if (group->q_len >= group->max_events) {
- event = q_overflow_event;
-
- /*
- * we need to return the overflow event
- * which means we need a ref
- */
- fsnotify_get_event(event);
- return_event = event;
-
- /* sorry, no private data on the overflow event */
- priv = NULL;
- }
-
- if (!list_empty(list) && merge) {
- struct fsnotify_event *tmp;
-
- tmp = merge(list, event);
- if (tmp) {
- mutex_unlock(&group->notification_mutex);
-
- if (return_event)
- fsnotify_put_event(return_event);
- if (holder != &event->holder)
- fsnotify_destroy_event_holder(holder);
- return tmp;
- }
- }
-
- spin_lock(&event->lock);
-
- if (list_empty(&event->holder.event_list)) {
- if (unlikely(holder))
- fsnotify_destroy_event_holder(holder);
- holder = &event->holder;
- } else if (unlikely(!holder)) {
- /* between the time we checked above and got the lock the in
- * event holder was used, go back and get a new one */
- spin_unlock(&event->lock);
- mutex_unlock(&group->notification_mutex);
-
- if (return_event) {
- fsnotify_put_event(return_event);
- return_event = NULL;
- }
-
- goto alloc_holder;
- }
-
- group->q_len++;
- holder->event = event;
-
- fsnotify_get_event(event);
- list_add_tail(&holder->event_list, list);
- if (priv)
- list_add_tail(&priv->event_list, &event->private_data_list);
- spin_unlock(&event->lock);
- mutex_unlock(&group->notification_mutex);
-
- wake_up(&group->notification_waitq);
- return return_event;
-}
-
-/*
- * Remove and return the first event from the notification list. There is a
- * reference held on this event since it was on the list. It is the responsibility
- * of the caller to drop this reference.
- */
-struct fsnotify_event *fsnotify_remove_notify_event(struct fsnotify_group *group)
-{
- struct fsnotify_event *event;
- struct fsnotify_event_holder *holder;
-
- BUG_ON(!mutex_is_locked(&group->notification_mutex));
-
- pr_debug("%s: group=%p\n", __func__, group);
-
- holder = list_first_entry(&group->notification_list, struct fsnotify_event_holder, event_list);
-
- event = holder->event;
-
- spin_lock(&event->lock);
- holder->event = NULL;
- list_del_init(&holder->event_list);
- spin_unlock(&event->lock);
-
- /* event == holder means we are referenced through the in event holder */
- if (holder != &event->holder)
- fsnotify_destroy_event_holder(holder);
-
- group->q_len--;
-
- return event;
-}
-
-/*
- * This will not remove the event, that must be done with fsnotify_remove_notify_event()
- */
-struct fsnotify_event *fsnotify_peek_notify_event(struct fsnotify_group *group)
-{
- struct fsnotify_event *event;
- struct fsnotify_event_holder *holder;
-
- BUG_ON(!mutex_is_locked(&group->notification_mutex));
-
- holder = list_first_entry(&group->notification_list, struct fsnotify_event_holder, event_list);
- event = holder->event;
-
- return event;
-}
-
-/*
- * Called when a group is being torn down to clean up any outstanding
- * event notifications.
- */
-void fsnotify_flush_notify(struct fsnotify_group *group)
-{
- struct fsnotify_event *event;
- struct fsnotify_event_private_data *priv;
-
- mutex_lock(&group->notification_mutex);
- while (!fsnotify_notify_queue_is_empty(group)) {
- event = fsnotify_remove_notify_event(group);
- /* if they don't implement free_event_priv they better not have attached any */
- if (group->ops->free_event_priv) {
- spin_lock(&event->lock);
- priv = fsnotify_remove_priv_from_event(group, event);
- spin_unlock(&event->lock);
- if (priv)
- group->ops->free_event_priv(priv);
- }
- fsnotify_put_event(event); /* matches fsnotify_add_notify_event */
- }
- mutex_unlock(&group->notification_mutex);
-}
-
-static void initialize_event(struct fsnotify_event *event)
-{
- INIT_LIST_HEAD(&event->holder.event_list);
- atomic_set(&event->refcnt, 1);
-
- spin_lock_init(&event->lock);
-
- INIT_LIST_HEAD(&event->private_data_list);
-}
-
-/*
- * Caller damn well better be holding whatever mutex is protecting the
- * old_holder->event_list and the new_event must be a clean event which
- * cannot be found anywhere else in the kernel.
- */
-int fsnotify_replace_event(struct fsnotify_event_holder *old_holder,
- struct fsnotify_event *new_event)
-{
- struct fsnotify_event *old_event = old_holder->event;
- struct fsnotify_event_holder *new_holder = &new_event->holder;
-
- enum event_spinlock_class {
- SPINLOCK_OLD,
- SPINLOCK_NEW,
- };
-
- pr_debug("%s: old_event=%p new_event=%p\n", __func__, old_event, new_event);
-
- /*
- * if the new_event's embedded holder is in use someone
- * screwed up and didn't give us a clean new event.
- */
- BUG_ON(!list_empty(&new_holder->event_list));
-
- spin_lock_nested(&old_event->lock, SPINLOCK_OLD);
- spin_lock_nested(&new_event->lock, SPINLOCK_NEW);
-
- new_holder->event = new_event;
- list_replace_init(&old_holder->event_list, &new_holder->event_list);
-
- spin_unlock(&new_event->lock);
- spin_unlock(&old_event->lock);
-
- /* event == holder means we are referenced through the in event holder */
- if (old_holder != &old_event->holder)
- fsnotify_destroy_event_holder(old_holder);
-
- fsnotify_get_event(new_event); /* on the list take reference */
- fsnotify_put_event(old_event); /* off the list, drop reference */
-
- return 0;
-}
-
-struct fsnotify_event *fsnotify_clone_event(struct fsnotify_event *old_event)
-{
- struct fsnotify_event *event;
-
- event = kmem_cache_alloc(fsnotify_event_cachep, GFP_KERNEL);
- if (!event)
- return NULL;
-
- pr_debug("%s: old_event=%p new_event=%p\n", __func__, old_event, event);
-
- memcpy(event, old_event, sizeof(*event));
- initialize_event(event);
-
- if (event->name_len) {
- event->file_name = kstrdup(old_event->file_name, GFP_KERNEL);
- if (!event->file_name) {
- kmem_cache_free(fsnotify_event_cachep, event);
- return NULL;
- }
- }
- event->tgid = get_pid(old_event->tgid);
- if (event->data_type == FSNOTIFY_EVENT_PATH)
- path_get(&event->path);
-
- return event;
-}
-
-/*
- * fsnotify_create_event - Allocate a new event which will be sent to each
- * group's handle_event function if the group was interested in this
- * particular event.
- *
- * @to_tell the inode which is supposed to receive the event (sometimes a
- * parent of the inode to which the event happened.
- * @mask what actually happened.
- * @data pointer to the object which was actually affected
- * @data_type flag indication if the data is a file, path, inode, nothing...
- * @name the filename, if available
- */
-struct fsnotify_event *fsnotify_create_event(struct inode *to_tell, __u32 mask, void *data,
- int data_type, const unsigned char *name,
- u32 cookie, gfp_t gfp)
-{
- struct fsnotify_event *event;
-
- event = kmem_cache_zalloc(fsnotify_event_cachep, gfp);
- if (!event)
- return NULL;
-
- pr_debug("%s: event=%p to_tell=%p mask=%x data=%p data_type=%d\n",
- __func__, event, to_tell, mask, data, data_type);
-
- initialize_event(event);
-
- if (name) {
- event->file_name = kstrdup(name, gfp);
- if (!event->file_name) {
- kmem_cache_free(fsnotify_event_cachep, event);
- return NULL;
- }
- event->name_len = strlen(event->file_name);
- }
-
- event->tgid = get_pid(task_tgid(current));
- event->sync_cookie = cookie;
- event->to_tell = to_tell;
- event->data_type = data_type;
-
- switch (data_type) {
- 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:
- event->inode = data;
- break;
- case FSNOTIFY_EVENT_NONE:
- event->inode = NULL;
- event->path.dentry = NULL;
- event->path.mnt = NULL;
- break;
- default:
- BUG();
- }
-
- event->mask = mask;
-
- return event;
-}
-
-static __init int fsnotify_notification_init(void)
-{
- fsnotify_event_cachep = KMEM_CACHE(fsnotify_event, SLAB_PANIC);
- fsnotify_event_holder_cachep = KMEM_CACHE(fsnotify_event_holder, SLAB_PANIC);
-
- q_overflow_event = fsnotify_create_event(NULL, FS_Q_OVERFLOW, NULL,
- FSNOTIFY_EVENT_NONE, NULL, 0,
- GFP_KERNEL);
- if (!q_overflow_event)
- panic("unable to allocate fsnotify q_overflow_event\n");
-
- return 0;
-}
-subsys_initcall(fsnotify_notification_init);
diff --git a/ANDROID_3.4.5/fs/notify/vfsmount_mark.c b/ANDROID_3.4.5/fs/notify/vfsmount_mark.c
deleted file mode 100644
index b7b4b0e8..00000000
--- a/ANDROID_3.4.5/fs/notify/vfsmount_mark.c
+++ /dev/null
@@ -1,195 +0,0 @@
-/*
- * Copyright (C) 2008 Red Hat, Inc., Eric Paris <eparis@redhat.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; see the file COPYING. If not, write to
- * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/mount.h>
-#include <linux/mutex.h>
-#include <linux/spinlock.h>
-
-#include <linux/atomic.h>
-
-#include <linux/fsnotify_backend.h>
-#include "fsnotify.h"
-#include "../mount.h"
-
-void fsnotify_clear_marks_by_mount(struct vfsmount *mnt)
-{
- struct fsnotify_mark *mark, *lmark;
- struct hlist_node *pos, *n;
- struct mount *m = real_mount(mnt);
- LIST_HEAD(free_list);
-
- spin_lock(&mnt->mnt_root->d_lock);
- hlist_for_each_entry_safe(mark, pos, n, &m->mnt_fsnotify_marks, m.m_list) {
- list_add(&mark->m.free_m_list, &free_list);
- hlist_del_init_rcu(&mark->m.m_list);
- fsnotify_get_mark(mark);
- }
- spin_unlock(&mnt->mnt_root->d_lock);
-
- list_for_each_entry_safe(mark, lmark, &free_list, m.free_m_list) {
- fsnotify_destroy_mark(mark);
- fsnotify_put_mark(mark);
- }
-}
-
-void fsnotify_clear_vfsmount_marks_by_group(struct fsnotify_group *group)
-{
- fsnotify_clear_marks_by_group_flags(group, FSNOTIFY_MARK_FLAG_VFSMOUNT);
-}
-
-/*
- * Recalculate the mask of events relevant to a given vfsmount locked.
- */
-static void fsnotify_recalc_vfsmount_mask_locked(struct vfsmount *mnt)
-{
- struct mount *m = real_mount(mnt);
- struct fsnotify_mark *mark;
- struct hlist_node *pos;
- __u32 new_mask = 0;
-
- assert_spin_locked(&mnt->mnt_root->d_lock);
-
- hlist_for_each_entry(mark, pos, &m->mnt_fsnotify_marks, m.m_list)
- new_mask |= mark->mask;
- m->mnt_fsnotify_mask = new_mask;
-}
-
-/*
- * Recalculate the mnt->mnt_fsnotify_mask, or the mask of all FS_* event types
- * any notifier is interested in hearing for this mount point
- */
-void fsnotify_recalc_vfsmount_mask(struct vfsmount *mnt)
-{
- spin_lock(&mnt->mnt_root->d_lock);
- fsnotify_recalc_vfsmount_mask_locked(mnt);
- spin_unlock(&mnt->mnt_root->d_lock);
-}
-
-void fsnotify_destroy_vfsmount_mark(struct fsnotify_mark *mark)
-{
- struct vfsmount *mnt = mark->m.mnt;
-
- assert_spin_locked(&mark->lock);
- assert_spin_locked(&mark->group->mark_lock);
-
- spin_lock(&mnt->mnt_root->d_lock);
-
- hlist_del_init_rcu(&mark->m.m_list);
- mark->m.mnt = NULL;
-
- fsnotify_recalc_vfsmount_mask_locked(mnt);
-
- spin_unlock(&mnt->mnt_root->d_lock);
-}
-
-static struct fsnotify_mark *fsnotify_find_vfsmount_mark_locked(struct fsnotify_group *group,
- struct vfsmount *mnt)
-{
- struct mount *m = real_mount(mnt);
- struct fsnotify_mark *mark;
- struct hlist_node *pos;
-
- assert_spin_locked(&mnt->mnt_root->d_lock);
-
- hlist_for_each_entry(mark, pos, &m->mnt_fsnotify_marks, m.m_list) {
- if (mark->group == group) {
- fsnotify_get_mark(mark);
- return mark;
- }
- }
- return NULL;
-}
-
-/*
- * given a group and vfsmount, find the mark associated with that combination.
- * if found take a reference to that mark and return it, else return NULL
- */
-struct fsnotify_mark *fsnotify_find_vfsmount_mark(struct fsnotify_group *group,
- struct vfsmount *mnt)
-{
- struct fsnotify_mark *mark;
-
- spin_lock(&mnt->mnt_root->d_lock);
- mark = fsnotify_find_vfsmount_mark_locked(group, mnt);
- spin_unlock(&mnt->mnt_root->d_lock);
-
- return mark;
-}
-
-/*
- * Attach an initialized mark to a given group and vfsmount.
- * These marks may be used for the fsnotify backend to determine which
- * event types should be delivered to which groups.
- */
-int fsnotify_add_vfsmount_mark(struct fsnotify_mark *mark,
- struct fsnotify_group *group, struct vfsmount *mnt,
- int allow_dups)
-{
- struct mount *m = real_mount(mnt);
- struct fsnotify_mark *lmark;
- struct hlist_node *node, *last = NULL;
- int ret = 0;
-
- mark->flags |= FSNOTIFY_MARK_FLAG_VFSMOUNT;
-
- assert_spin_locked(&mark->lock);
- assert_spin_locked(&group->mark_lock);
-
- spin_lock(&mnt->mnt_root->d_lock);
-
- mark->m.mnt = mnt;
-
- /* is mark the first mark? */
- if (hlist_empty(&m->mnt_fsnotify_marks)) {
- hlist_add_head_rcu(&mark->m.m_list, &m->mnt_fsnotify_marks);
- goto out;
- }
-
- /* should mark be in the middle of the current list? */
- hlist_for_each_entry(lmark, node, &m->mnt_fsnotify_marks, m.m_list) {
- last = node;
-
- if ((lmark->group == group) && !allow_dups) {
- ret = -EEXIST;
- goto out;
- }
-
- if (mark->group->priority < lmark->group->priority)
- continue;
-
- if ((mark->group->priority == lmark->group->priority) &&
- (mark->group < lmark->group))
- continue;
-
- hlist_add_before_rcu(&mark->m.m_list, &lmark->m.m_list);
- goto out;
- }
-
- BUG_ON(last == NULL);
- /* mark should be the last entry. last is the current last entry */
- hlist_add_after_rcu(last, &mark->m.m_list);
-out:
- fsnotify_recalc_vfsmount_mask_locked(mnt);
- spin_unlock(&mnt->mnt_root->d_lock);
-
- return ret;
-}