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server: Add directories to recursive watches as they're opened.
This commit is contained in:
parent
3faa942c8f
commit
4212108598
106
server/change.c
106
server/change.c
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@ -934,6 +934,105 @@ static int inotify_adjust_changes( struct dir *dir )
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return 1;
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}
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static char *get_basename( const char *link )
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{
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char *buffer, *name = NULL;
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int r, n = 0x100;
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while (1)
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{
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buffer = malloc( n );
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if (!buffer) break;
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r = readlink( link, buffer, n );
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if (r < 0)
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break;
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if (r < n)
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{
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name = buffer;
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break;
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}
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free( buffer );
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n *= 2;
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}
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if (name)
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{
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while (r > 0 && name[ r - 1 ] == '/' )
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r--;
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name[ r ] = 0;
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name = strrchr( name, '/' );
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if (name)
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name = strdup( &name[1] );
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}
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free( buffer );
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return name;
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}
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static int dir_add_to_existing_notify( struct dir *dir )
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{
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struct inode *inode, *parent;
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unsigned int filter = 0;
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struct stat st, st_new;
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char link[35], *name;
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int wd, unix_fd;
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if (!inotify_fd)
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return 0;
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unix_fd = get_unix_fd( dir->fd );
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/* check if it's in the list of inodes we want to watch */
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if (-1 == fstat( unix_fd, &st_new ))
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return 0;
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inode = find_inode( st_new.st_dev, st_new.st_ino );
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if (inode)
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return 0;
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/* lookup the parent */
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sprintf( link, "/proc/self/fd/%u/..", unix_fd );
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if (-1 == stat( link, &st ))
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return 0;
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/*
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* If there's no parent, stop. We could keep going adding
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* ../ to the path until we hit the root of the tree or
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* find a recursively watched ancestor.
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* Assume it's too expensive to search up the tree for now.
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*/
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parent = find_inode( st.st_dev, st.st_ino );
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if (!parent)
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return 0;
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if (parent->wd == -1)
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return 0;
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filter = filter_from_inode( parent, 1 );
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if (!filter)
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return 0;
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sprintf( link, "/proc/self/fd/%u", unix_fd );
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name = get_basename( link );
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if (!name)
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return 0;
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inode = inode_add( parent, st_new.st_dev, st_new.st_ino, name );
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free( name );
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if (!inode)
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return 0;
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/* Couldn't find this inode at the start of the function, must be new */
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assert( inode->wd == -1 );
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wd = inotify_add_dir( link, filter );
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if (wd != -1)
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inode_set_wd( inode, wd );
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return 1;
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}
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#else
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static int init_inotify( void )
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@ -951,6 +1050,11 @@ static void free_inode( struct inode *inode )
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assert( 0 );
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}
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static int dir_add_to_existing_notify( struct dir *dir )
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{
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return 0;
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}
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#endif /* USE_INOTIFY */
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struct object *create_dir_obj( struct fd *fd )
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@ -973,6 +1077,8 @@ struct object *create_dir_obj( struct fd *fd )
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dir->fd = fd;
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set_fd_user( fd, &dir_fd_ops, &dir->obj );
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dir_add_to_existing_notify( dir );
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return &dir->obj;
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}
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