diff options
Diffstat (limited to 'Documentation/filesystems')
| -rw-r--r-- | Documentation/filesystems/locking.rst | 4 | ||||
| -rw-r--r-- | Documentation/filesystems/vfs.rst | 11 |
2 files changed, 8 insertions, 7 deletions
diff --git a/Documentation/filesystems/locking.rst b/Documentation/filesystems/locking.rst index 2e567e341c3b..580581281ed7 100644 --- a/Documentation/filesystems/locking.rst +++ b/Documentation/filesystems/locking.rst @@ -253,10 +253,10 @@ prototypes:: int (*writepages)(struct address_space *, struct writeback_control *); bool (*dirty_folio)(struct address_space *, struct folio *folio); void (*readahead)(struct readahead_control *); - int (*write_begin)(struct file *, struct address_space *mapping, + int (*write_begin)(const struct kiocb *, struct address_space *mapping, loff_t pos, unsigned len, struct folio **foliop, void **fsdata); - int (*write_end)(struct file *, struct address_space *mapping, + int (*write_end)(const struct kiocb *, struct address_space *mapping, loff_t pos, unsigned len, unsigned copied, struct folio *folio, void *fsdata); sector_t (*bmap)(struct address_space *, sector_t); diff --git a/Documentation/filesystems/vfs.rst b/Documentation/filesystems/vfs.rst index fd32a9a17bfb..57604b07bdc9 100644 --- a/Documentation/filesystems/vfs.rst +++ b/Documentation/filesystems/vfs.rst @@ -758,8 +758,9 @@ process is more complicated and uses write_begin/write_end or dirty_folio to write data into the address_space, and writepages to writeback data to storage. -Adding and removing pages to/from an address_space is protected by the -inode's i_mutex. +Removing pages from an address_space requires holding the inode's i_rwsem +exclusively, while adding pages to the address_space requires holding the +inode's i_mapping->invalidate_lock exclusively. When data is written to a page, the PG_Dirty flag should be set. It typically remains set until writepages asks for it to be written. This @@ -822,10 +823,10 @@ cache in your filesystem. The following members are defined: int (*writepages)(struct address_space *, struct writeback_control *); bool (*dirty_folio)(struct address_space *, struct folio *); void (*readahead)(struct readahead_control *); - int (*write_begin)(struct file *, struct address_space *mapping, + int (*write_begin)(const struct kiocb *, struct address_space *mapping, loff_t pos, unsigned len, - struct page **pagep, void **fsdata); - int (*write_end)(struct file *, struct address_space *mapping, + struct page **pagep, void **fsdata); + int (*write_end)(const struct kiocb *, struct address_space *mapping, loff_t pos, unsigned len, unsigned copied, struct folio *folio, void *fsdata); sector_t (*bmap)(struct address_space *, sector_t); |