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Revert "fsnotify: store struct file not struct path"

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This reverts commit 3bcf3860a4 (and the
accompanying commit c1e5c95402 "vfs/fsnotify: fsnotify_close can delay
the final work in fput" that was a horribly ugly hack to make it work at
all).

The 'struct file' approach not only causes that disgusting hack, it
somehow breaks pulseaudio, probably due to some other subtlety with
f_count handling.

Fix up various conflicts due to later fsnotify work.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Linus Torvalds
2010-08-12 14:23:04 -07:00
parent ad41a1e0ca
commit 2069601b3f
9 changed files with 61 additions and 76 deletions
Download Patch File Download Diff File Expand all files Collapse all files
fs/notify/fanotify/fanotify.c
+4 -4
View File
@@ -17,9 +17,9 @@ static bool should_merge(struct fsnotify_event *old, struct fsnotify_event *new)
old->data_type == new->data_type &&
old->tgid == new->tgid) {
switch (old->data_type) {
case (FSNOTIFY_EVENT_FILE):
if ((old->file->f_path.mnt == new->file->f_path.mnt) &&
(old->file->f_path.dentry == new->file->f_path.dentry))
case (FSNOTIFY_EVENT_PATH):
if ((old->path.mnt == new->path.mnt) &&
(old->path.dentry == new->path.dentry))
return true;
case (FSNOTIFY_EVENT_NONE):
return true;
@@ -174,7 +174,7 @@ static bool fanotify_should_send_event(struct fsnotify_group *group,
return false;
/* if we don't have enough info to send an event to userspace say no */
if (data_type != FSNOTIFY_EVENT_FILE)
if (data_type != FSNOTIFY_EVENT_PATH)
return false;
if (inode_mark && vfsmnt_mark) {
fs/notify/fanotify/fanotify_user.c
+3 -3
View File
@@ -65,7 +65,7 @@ static int create_fd(struct fsnotify_group *group, struct fsnotify_event *event)
if (client_fd < 0)
return client_fd;
if (event->data_type != FSNOTIFY_EVENT_FILE) {
if (event->data_type != FSNOTIFY_EVENT_PATH) {
WARN_ON(1);
put_unused_fd(client_fd);
return -EINVAL;
@@ -75,8 +75,8 @@ static int create_fd(struct fsnotify_group *group, struct fsnotify_event *event)
* we need a new file handle for the userspace program so it can read even if it was
* originally opened O_WRONLY.
*/
dentry = dget(event->file->f_path.dentry);
mnt = mntget(event->file->f_path.mnt);
dentry = dget(event->path.dentry);
mnt = mntget(event->path.mnt);
/* it's possible this event was an overflow event. in that case dentry and mnt
* are NULL; That's fine, just don't call dentry open */
if (dentry && mnt)
fs/notify/fsnotify.c
+6 -6
View File
@@ -84,7 +84,7 @@ void __fsnotify_update_child_dentry_flags(struct inode *inode)
}
/* Notify this dentry's parent about a child's events. */
void __fsnotify_parent(struct file *file, struct dentry *dentry, __u32 mask)
void __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask)
{
struct dentry *parent;
struct inode *p_inode;
@@ -92,7 +92,7 @@ void __fsnotify_parent(struct file *file, struct dentry *dentry, __u32 mask)
bool should_update_children = false;
if (!dentry)
dentry = file->f_path.dentry;
dentry = path->dentry;
if (!(dentry->d_flags & DCACHE_FSNOTIFY_PARENT_WATCHED))
return;
@@ -124,8 +124,8 @@ void __fsnotify_parent(struct file *file, struct dentry *dentry, __u32 mask)
* specifies these are events which came from a child. */
mask |= FS_EVENT_ON_CHILD;
if (file)
fsnotify(p_inode, mask, file, FSNOTIFY_EVENT_FILE,
if (path)
fsnotify(p_inode, mask, path, FSNOTIFY_EVENT_PATH,
dentry->d_name.name, 0);
else
fsnotify(p_inode, mask, dentry->d_inode, FSNOTIFY_EVENT_INODE,
@@ -217,8 +217,8 @@ int fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is,
/* global tests shouldn't care about events on child only the specific event */
__u32 test_mask = (mask & ~FS_EVENT_ON_CHILD);
if (data_is == FSNOTIFY_EVENT_FILE)
mnt = ((struct file *)data)->f_path.mnt;
if (data_is == FSNOTIFY_EVENT_PATH)
mnt = ((struct path *)data)->mnt;
else
mnt = NULL;
fs/notify/inotify/inotify_fsnotify.c
+6 -6
View File
@@ -52,9 +52,9 @@ static bool event_compare(struct fsnotify_event *old, struct fsnotify_event *new
!strcmp(old->file_name, new->file_name))
return true;
break;
case (FSNOTIFY_EVENT_FILE):
if ((old->file->f_path.mnt == new->file->f_path.mnt) &&
(old->file->f_path.dentry == new->file->f_path.dentry))
case (FSNOTIFY_EVENT_PATH):
if ((old->path.mnt == new->path.mnt) &&
(old->path.dentry == new->path.dentry))
return true;
break;
case (FSNOTIFY_EVENT_NONE):
@@ -147,10 +147,10 @@ static bool inotify_should_send_event(struct fsnotify_group *group, struct inode
__u32 mask, void *data, int data_type)
{
if ((inode_mark->mask & FS_EXCL_UNLINK) &&
(data_type == FSNOTIFY_EVENT_FILE)) {
struct file *file = data;
(data_type == FSNOTIFY_EVENT_PATH)) {
struct path *path = data;
if (d_unlinked(file->f_path.dentry))
if (d_unlinked(path->dentry))
return false;
}
fs/notify/notification.c
+11 -22
View File
@@ -31,7 +31,6 @@
* allocated and used.
*/
#include <linux/file.h>
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/kernel.h>
@@ -90,8 +89,8 @@ void fsnotify_put_event(struct fsnotify_event *event)
if (atomic_dec_and_test(&event->refcnt)) {
pr_debug("%s: event=%p\n", __func__, event);
if (event->data_type == FSNOTIFY_EVENT_FILE)
fput(event->file);
if (event->data_type == FSNOTIFY_EVENT_PATH)
path_put(&event->path);
BUG_ON(!list_empty(&event->private_data_list));
@@ -376,8 +375,8 @@ struct fsnotify_event *fsnotify_clone_event(struct fsnotify_event *old_event)
}
}
event->tgid = get_pid(old_event->tgid);
if (event->data_type == FSNOTIFY_EVENT_FILE)
get_file(event->file);
if (event->data_type == FSNOTIFY_EVENT_PATH)
path_get(&event->path);
return event;
}
@@ -424,22 +423,11 @@ struct fsnotify_event *fsnotify_create_event(struct inode *to_tell, __u32 mask,
event->data_type = data_type;
switch (data_type) {
case FSNOTIFY_EVENT_FILE: {
event->file = data;
/*
* if this file is about to disappear hold an extra reference
* until we return to __fput so we don't have to worry about
* future get/put destroying the file under us or generating
* additional events. Notice that we change f_mode without
* holding f_lock. This is safe since this is the only possible
* reference to this object in the kernel (it was about to be
* freed, remember?)
*/
if (!atomic_long_read(&event->file->f_count)) {
event->file->f_mode |= FMODE_NONOTIFY;
get_file(event->file);
}
get_file(event->file);
case FSNOTIFY_EVENT_PATH: {
struct path *path = data;
event->path.dentry = path->dentry;
event->path.mnt = path->mnt;
path_get(&event->path);
break;
}
case FSNOTIFY_EVENT_INODE:
@@ -447,7 +435,8 @@ struct fsnotify_event *fsnotify_create_event(struct inode *to_tell, __u32 mask,
break;
case FSNOTIFY_EVENT_NONE:
event->inode = NULL;
event->file = NULL;
event->path.dentry = NULL;
event->path.mnt = NULL;
break;
default:
BUG();