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https://gitlab.winehq.org/wine/wine.git
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server: Track created and removed directories in the tree of inodes for inotify.
Add them to or remove them from existing recursive watches.
This commit is contained in:
Mike McCormack
Alexandre Julliard
parent
43a0f0c85a
commit
e4faabfa64
5 changed files with 245 additions and 45 deletions
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@ -1793,7 +1793,7 @@ static void WINAPI read_changes_apc( void *user, PIO_STATUS_BLOCK iosb, ULONG st
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struct read_changes_info *info = user;
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char path[PATH_MAX];
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NTSTATUS ret = STATUS_SUCCESS;
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int len, action;
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int len, action, i;
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TRACE("%p %p %p %08lx\n", info, info->ApcContext, iosb, status);
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@ -1823,6 +1823,11 @@ static void WINAPI read_changes_apc( void *user, PIO_STATUS_BLOCK iosb, ULONG st
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pfni = (PFILE_NOTIFY_INFORMATION) info->Buffer;
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/* convert to an NT style path */
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for (i=0; i<len; i++)
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if (path[i] == '/')
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path[i] = '\\';
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len = ntdll_umbstowcs( 0, path, len, pfni->FileName,
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info->BufferSize - sizeof (*pfni) );
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@ -1900,6 +1905,7 @@ NtNotifyChangeDirectoryFile( HANDLE FileHandle, HANDLE Event,
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req->event = Event;
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req->filter = CompletionFilter;
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req->want_data = (Buffer != NULL);
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req->subtree = WatchTree;
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req->io_apc = read_changes_apc;
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req->io_sb = IoStatusBlock;
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req->io_user = info;
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@ -1400,6 +1400,7 @@ struct read_directory_changes_request
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obj_handle_t handle;
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obj_handle_t event;
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unsigned int filter;
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int subtree;
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int want_data;
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void* io_apc;
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void* io_sb;
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@ -4363,6 +4364,6 @@ union generic_reply
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struct query_symlink_reply query_symlink_reply;
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};
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#define SERVER_PROTOCOL_VERSION 226
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#define SERVER_PROTOCOL_VERSION 227
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#endif /* __WINE_WINE_SERVER_PROTOCOL_H */
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277
server/change.c
277
server/change.c
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@ -152,6 +152,7 @@ struct dir
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int notified; /* SIGIO counter */
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int want_data; /* return change data */
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long signaled; /* the file changed */
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int subtree; /* do we want to watch subdirectories? */
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struct list change_q; /* change readers */
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struct list change_records; /* data for the change */
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struct list in_entry; /* entry in the inode dirs list */
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@ -388,17 +389,23 @@ static void dir_cancel_async( struct fd *fd )
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#define HASH_SIZE 31
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struct inode {
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struct list ch_entry; /* entry in the children list */
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struct list children; /* children of this inode */
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struct inode *parent; /* parent of this inode */
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struct list dirs; /* directory handles watching this inode */
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struct list ino_entry; /* entry in the inode hash */
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struct list wd_entry; /* entry in the watch descriptor hash */
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dev_t dev; /* device number */
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ino_t ino; /* device's inode number */
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int wd; /* inotify's watch descriptor */
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char *name; /* basename name of the inode */
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};
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struct list inode_hash[ HASH_SIZE ];
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struct list wd_hash[ HASH_SIZE ];
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static int inotify_add_dir( char *path, unsigned int filter );
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static struct inode *inode_from_wd( int wd )
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{
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struct list *bucket = &wd_hash[ wd % HASH_SIZE ];
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@ -416,7 +423,7 @@ static inline struct list *get_hash_list( dev_t dev, ino_t ino )
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return &inode_hash[ (ino ^ dev) % HASH_SIZE ];
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}
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static struct inode *get_inode( dev_t dev, ino_t ino )
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static struct inode *find_inode( dev_t dev, ino_t ino )
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{
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struct list *bucket = get_hash_list( dev, ino );
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struct inode *inode;
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@ -435,15 +442,28 @@ static struct inode *create_inode( dev_t dev, ino_t ino )
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inode = malloc( sizeof *inode );
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if (inode)
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{
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list_init( &inode->children );
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list_init( &inode->dirs );
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inode->ino = ino;
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inode->dev = dev;
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inode->wd = -1;
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inode->parent = NULL;
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inode->name = NULL;
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list_add_tail( get_hash_list( dev, ino ), &inode->ino_entry );
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}
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return inode;
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}
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static struct inode *get_inode( dev_t dev, ino_t ino )
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{
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struct inode *inode;
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inode = find_inode( dev, ino );
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if (inode)
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return inode;
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return create_inode( dev, ino );
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}
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static void inode_set_wd( struct inode *inode, int wd )
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{
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if (inode->wd != -1)
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@ -452,20 +472,83 @@ static void inode_set_wd( struct inode *inode, int wd )
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list_add_tail( &wd_hash[ wd % HASH_SIZE ], &inode->wd_entry );
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}
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static void inode_set_name( struct inode *inode, const char *name )
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{
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if (inode->name)
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free (inode->name);
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inode->name = name ? strdup( name ) : NULL;
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}
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static void free_inode( struct inode *inode )
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{
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if (!list_empty( &inode->dirs ))
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int subtree = 0, watches = 0;
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struct dir *dir;
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LIST_FOR_EACH_ENTRY( dir, &inode->dirs, struct dir, in_entry )
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{
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subtree |= dir->subtree;
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watches++;
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}
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if (!subtree && !inode->parent)
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{
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struct list *head;
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while ( (head = list_head(&inode->children)) )
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{
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struct inode *tmp = LIST_ENTRY( head, struct inode, ch_entry );
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assert( tmp != inode );
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assert( tmp->parent == inode );
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free_inode( tmp );
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}
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}
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if (watches)
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return;
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if (inode->parent)
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list_remove( &inode->ch_entry );
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if (inode->wd != -1)
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{
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inotify_remove_watch( get_unix_fd( inotify_fd ), inode->wd );
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list_remove( &inode->wd_entry );
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}
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list_remove( &inode->ino_entry );
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free( inode->name );
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free( inode );
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}
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static struct inode *inode_add( struct inode *parent,
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dev_t dev, ino_t ino, const char *name )
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{
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struct inode *inode;
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inode = get_inode( dev, ino );
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if (!inode)
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return NULL;
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if (!inode->parent)
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{
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list_add_tail( &parent->children, &inode->ch_entry );
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inode->parent = parent;
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assert( inode != parent );
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}
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inode_set_name( inode, name );
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return inode;
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}
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static struct inode *inode_from_name( struct inode *inode, const char *name )
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{
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struct inode *i;
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LIST_FOR_EACH_ENTRY( i, &inode->children, struct inode, ch_entry )
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if (i->name && !strcmp( i->name, name ))
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return i;
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return NULL;
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}
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static int inotify_get_poll_events( struct fd *fd );
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static void inotify_poll_event( struct fd *fd, int event );
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static int inotify_get_info( struct fd *fd );
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@ -490,6 +573,8 @@ static void inotify_do_change_notify( struct dir *dir, unsigned int action,
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{
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struct change_record *record;
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assert( dir->obj.ops == &dir_ops );
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if (dir->want_data)
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{
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size_t len = strlen(relpath);
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@ -531,38 +616,134 @@ static unsigned int filter_from_event( struct inotify_event *ie )
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return filter;
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}
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static int inode_entry_is_dir( struct inode *inode, const char *name )
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/* scan up the parent directories for watches */
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static unsigned int filter_from_inode( struct inode *inode, int is_parent )
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{
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unsigned int filter = 0;
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struct dir *dir;
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/* combine filters from parents watching subtrees */
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while (inode)
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{
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LIST_FOR_EACH_ENTRY( dir, &inode->dirs, struct dir, in_entry )
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if (dir->subtree || !is_parent)
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filter |= dir->filter;
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is_parent = 1;
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inode = inode->parent;
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}
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return filter;
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}
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static char *inode_get_path( struct inode *inode, int sz )
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{
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/* distinguish a created file from a directory */
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char *path;
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struct list *head;
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struct stat st;
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int unix_fd, r;
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char *path;
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int len;
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if (!inode)
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return NULL;
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head = list_head( &inode->dirs );
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if (!head)
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return -1;
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if (head)
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{
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int unix_fd = get_unix_fd( LIST_ENTRY( head, struct dir, in_entry )->fd );
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path = malloc ( 32 + sz );
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if (path)
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sprintf( path, "/proc/self/fd/%u/", unix_fd );
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return path;
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}
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path = malloc( strlen(name) + 32 );
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if (!inode->name)
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return NULL;
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len = strlen( inode->name );
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path = inode_get_path( inode->parent, sz + len + 1 );
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if (!path)
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return -1;
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return NULL;
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strcat( path, inode->name );
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strcat( path, "/" );
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return path;
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}
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static int inode_check_dir( struct inode *parent, const char *name )
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{
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char *path;
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unsigned int filter;
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struct inode *inode;
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struct stat st;
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int wd = -1, r = -1;
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path = inode_get_path( parent, strlen(name) );
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if (!path)
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return r;
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strcat( path, name );
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unix_fd = get_unix_fd( LIST_ENTRY( head, struct dir, in_entry )->fd );
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sprintf( path, "/proc/self/fd/%u/%s", unix_fd, name );
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r = stat( path, &st );
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free( path );
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if (-1 == r)
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return -1;
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if (r < 0) goto end;
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if (S_ISDIR(st.st_mode))
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return 1;
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return 0;
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if (!S_ISDIR(st.st_mode))
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{
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r = 0;
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goto end;
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}
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r = 1;
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filter = filter_from_inode( parent, 1 );
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if (!filter)
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goto end;
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inode = inode_add( parent, st.st_dev, st.st_ino, name );
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if (!inode || inode->wd != -1)
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goto end;
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wd = inotify_add_dir( path, filter );
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if (wd != -1)
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inode_set_wd( inode, wd );
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else
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free_inode( inode );
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end:
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free( path );
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return r;
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}
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static int prepend( char **path, const char *segment )
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{
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int extra;
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char *p;
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extra = strlen( segment ) + 1;
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if (*path)
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{
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int len = strlen( *path ) + 1;
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p = realloc( *path, len + extra );
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if (!p) return 0;
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memmove( &p[ extra ], p, len );
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p[ extra - 1 ] = '/';
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memcpy( p, segment, extra - 1 );
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}
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else
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{
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p = malloc( extra );
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if (!p) return 0;
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memcpy( p, segment, extra );
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}
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*path = p;
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return 1;
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}
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static void inotify_notify_all( struct inotify_event *ie )
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{
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unsigned int filter, action;
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struct inode *inode;
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struct inode *inode, *i;
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char *path = NULL;
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struct dir *dir;
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inode = inode_from_wd( ie->wd );
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@ -576,7 +757,7 @@ static void inotify_notify_all( struct inotify_event *ie )
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if (ie->mask & IN_CREATE)
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{
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switch (inode_entry_is_dir( inode, ie->name ))
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switch (inode_check_dir( inode, ie->name ))
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{
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case 1:
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filter &= ~FILE_NOTIFY_CHANGE_FILE_NAME;
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@ -595,9 +776,32 @@ static void inotify_notify_all( struct inotify_event *ie )
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else
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action = FILE_ACTION_MODIFIED;
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LIST_FOR_EACH_ENTRY( dir, &inode->dirs, struct dir, in_entry )
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if (filter & dir->filter)
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inotify_do_change_notify( dir, action, ie->name );
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/*
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* Work our way up the inode heirachy
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* extending the relative path as we go
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* and notifyiny all recursive watches.
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*/
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if (!prepend( &path, ie->name ))
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return;
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for (i = inode; i; i = i->parent)
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{
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LIST_FOR_EACH_ENTRY( dir, &i->dirs, struct dir, in_entry )
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if ((filter & dir->filter) && (i==inode || dir->subtree))
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inotify_do_change_notify( dir, action, path );
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if (!i->name || !prepend( &path, i->name ))
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break;
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}
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free( path );
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if (ie->mask & IN_DELETE)
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{
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i = inode_from_name( inode, ie->name );
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if (i)
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free_inode( i );
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}
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}
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static void inotify_poll_event( struct fd *fd, int event )
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@ -642,12 +846,11 @@ static inline struct fd *create_inotify_fd( void )
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static int map_flags( unsigned int filter )
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{
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unsigned int mask = 0;
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unsigned int mask;
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/* always watch these so we can track subdirectories in recursive watches */
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mask = (IN_MOVED_FROM | IN_MOVED_TO | IN_DELETE | IN_CREATE | IN_DELETE_SELF);
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if (filter & FILE_NOTIFY_CHANGE_FILE_NAME)
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mask |= (IN_MOVED_FROM | IN_MOVED_TO | IN_DELETE | IN_CREATE);
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if (filter & FILE_NOTIFY_CHANGE_DIR_NAME)
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mask |= (IN_MOVED_FROM | IN_MOVED_TO | IN_DELETE | IN_CREATE | IN_DELETE_SELF);
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if (filter & FILE_NOTIFY_CHANGE_ATTRIBUTES)
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mask |= IN_ATTRIB;
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if (filter & FILE_NOTIFY_CHANGE_SIZE)
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@ -656,8 +859,6 @@ static int map_flags( unsigned int filter )
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mask |= IN_MODIFY;
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if (filter & FILE_NOTIFY_CHANGE_LAST_ACCESS)
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mask |= IN_ACCESS;
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if (filter & FILE_NOTIFY_CHANGE_CREATION)
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mask |= IN_CREATE;
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if (filter & FILE_NOTIFY_CHANGE_SECURITY)
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mask |= IN_ATTRIB;
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@ -673,17 +874,6 @@ static int inotify_add_dir( char *path, unsigned int filter )
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return wd;
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}
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static unsigned int filter_from_inode( struct inode *inode )
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{
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unsigned int filter = 0;
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struct dir *dir;
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LIST_FOR_EACH_ENTRY( dir, &inode->dirs, struct dir, in_entry )
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filter |= dir->filter;
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return filter;
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}
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static int init_inotify( void )
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{
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int i;
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@ -733,7 +923,7 @@ static int inotify_adjust_changes( struct dir *dir )
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dir->inode = inode;
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}
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filter = filter_from_inode( inode );
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filter = filter_from_inode( inode, 0 );
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sprintf( path, "/proc/self/fd/%u", unix_fd );
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wd = inotify_add_dir( path, filter );
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@ -825,6 +1015,7 @@ DECL_HANDLER(read_directory_changes)
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init_inotify();
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insert_change( dir );
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dir->filter = req->filter;
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dir->subtree = req->subtree;
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dir->want_data = req->want_data;
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}
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|
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@ -1044,6 +1044,7 @@ enum char_info_mode
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obj_handle_t handle; /* handle to the directory */
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obj_handle_t event; /* handle to the event */
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unsigned int filter; /* notification filter */
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int subtree; /* watch the subtree? */
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int want_data; /* flag indicating whether change data should be collected */
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void* io_apc; /* APC routine to queue upon end of async */
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void* io_sb; /* I/O status block (unique across all async on this handle) */
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@ -1448,6 +1448,7 @@ static void dump_read_directory_changes_request( const struct read_directory_cha
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fprintf( stderr, " handle=%p,", req->handle );
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fprintf( stderr, " event=%p,", req->event );
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fprintf( stderr, " filter=%08x,", req->filter );
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fprintf( stderr, " subtree=%d,", req->subtree );
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fprintf( stderr, " want_data=%d,", req->want_data );
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fprintf( stderr, " io_apc=%p,", req->io_apc );
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fprintf( stderr, " io_sb=%p,", req->io_sb );
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||||
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|
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|||
Loading…
Reference in a new issue