linux/fs/ext2, branch v5.14

fs/ext2: Avoid page_address on pages returned by ext2_get_page

2021-07-16T10:36:51Z

Commit 782b76d7abdf02b12c46ed6f1e9bf715569027f7 ("fs/ext2: Replace kmap() with kmap_local_page()") replaced the kmap/kunmap calls in ext2_get_page/ext2_put_page with kmap_local_page/kunmap_local for efficiency reasons. As a necessary side change, the commit also made ext2_get_page (and ext2_find_entry and ext2_dotdot) return the mapping address along with the page itself, as it is required for kunmap_local, and converted uses of page_address on such pages to use the newly returned address instead. However, uses of page_address on such pages were missed in ext2_check_page and ext2_delete_entry, which triggers oopses if kmap_local_page happens to return an address from high memory. Fix this now by converting the remaining uses of page_address to use the right address, as returned by kmap_local_page. Link: https://lore.kernel.org/r/20210714185448.8707ac239e9f12b3a7f5b9f9@urjc.es Reviewed-by: Ira Weiny Signed-off-by: Javier Pello Fixes: 782b76d7abdf ("fs/ext2: Replace kmap() with kmap_local_page()") Signed-off-by: Jan Kara

fs: remove noop_set_page_dirty()

2021-06-29T17:53:48Z

Use __set_page_dirty_no_writeback() instead. This will set the dirty bit on the page, which will be used to avoid calling set_page_dirty() in the future. It will have no effect on actually writing the page back, as the pages are not on any LRU lists. [akpm@linux-foundation.org: export __set_page_dirty_no_writeback() to modules] Link: https://lkml.kernel.org/r/20210615162342.1669332-6-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) Cc: Al Viro Cc: Christoph Hellwig Cc: Dan Williams Cc: Greg Kroah-Hartman Cc: Jan Kara Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm: require ->set_page_dirty to be explicitly wired up

2021-06-29T17:53:48Z

Remove the CONFIG_BLOCK default to __set_page_dirty_buffers and just wire that method up for the missing instances. [hch@lst.de: ecryptfs: add a ->set_page_dirty cludge] Link: https://lkml.kernel.org/r/20210624125250.536369-1-hch@lst.de Link: https://lkml.kernel.org/r/20210614061512.3966143-4-hch@lst.de Signed-off-by: Christoph Hellwig Reviewed-by: Greg Kroah-Hartman Reviewed-by: Jan Kara Cc: Al Viro Cc: Matthew Wilcox (Oracle) Cc: Tyler Hicks Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2021-05-02T16:14:01Z

Pull misc vfs updates from Al Viro: "Assorted stuff all over the place" * 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: useful constants: struct qstr for ".." hostfs_open(): don't open-code file_dentry() whack-a-mole: kill strlen_user() (again) autofs: should_expire() argument is guaranteed to be positive apparmor:match_mn() - constify devpath argument buffer: a small optimization in grow_buffers get rid of autofs_getpath() constify dentry argument of dentry_path()/dentry_path_raw()

Merge tag 'fsnotify_for_v5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

2021-04-29T18:06:13Z

Pull fsnotify updates from Jan Kara: - support for limited fanotify functionality for unpriviledged users - faster merging of fanotify events - a few smaller fsnotify improvements * tag 'fsnotify_for_v5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs: shmem: allow reporting fanotify events with file handles on tmpfs fs: introduce a wrapper uuid_to_fsid() fanotify_user: use upper_32_bits() to verify mask fanotify: support limited functionality for unprivileged users fanotify: configurable limits via sysfs fanotify: limit number of event merge attempts fsnotify: use hash table for faster events merge fanotify: mix event info and pid into merge key hash fanotify: reduce event objectid to 29-bit hash fsnotify: allow fsnotify_{peek,remove}_first_event with empty queue

Merge tag 'for_v5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

2021-04-29T17:51:29Z

Pull quota, ext2, reiserfs updates from Jan Kara: - support for path (instead of device) based quotactl syscall (quotactl_path(2)) - ext2 conversion to kmap_local() - other minor cleanups & fixes * tag 'for_v5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs: fs/reiserfs/journal.c: delete useless variables fs/ext2: Replace kmap() with kmap_local_page() ext2: Match up ext2_put_page() with ext2_dotdot() and ext2_find_entry() fs/ext2/: fix misspellings using codespell tool quota: report warning limits for realtime space quotas quota: wire up quotactl_path quota: Add mountpath based quota support

fs: introduce a wrapper uuid_to_fsid()

2021-04-19T14:03:15Z

Some filesystem's use a digest of their uuid for f_fsid. Create a simple wrapper for this open coded folding. Filesystems that have a non null uuid but use the block device number for f_fsid may also consider using this helper. [JK: Added missing asm/byteorder.h include] Link: https://lore.kernel.org/r/20210322173944.449469-2-amir73il@gmail.com Acked-by: Damien Le Moal Reviewed-by: Christian Brauner Signed-off-by: Amir Goldstein Signed-off-by: Jan Kara

useful constants: struct qstr for ".."

2021-04-16T02:36:45Z

Signed-off-by: Al Viro

ext2: convert to fileattr

2021-04-12T13:04:29Z

Use the fileattr API to let the VFS handle locking, permission checking and conversion. Signed-off-by: Miklos Szeredi Cc: Jan Kara

fs/ext2: Replace kmap() with kmap_local_page()

2021-03-31T11:10:20Z

The k[un]map() calls in ext2_[get|put]_page() are localized to a single thread. kmap_local_page() is more efficient. Replace the kmap/kunmap calls with kmap_local_page()/kunmap_local(). kunmap_local() requires the mapping address so return that address from ext2_get_page() to be used in ext2_put_page(). This works well because many of the callers need the address anyway so it is not bad to return it along with the page. In addition, kmap_local_page()/kunmap_local() require strict nesting rules to be followed. Document the new nesting requirements of ext2_get_page() and ext2_put_page() as well as the relationship between ext2_get_page(), ext2_find_entry(), and ext2_dotdot(). Adjust one ext2_put_page() call site in ext2_rename() to ensure the new nesting requirements are met. Finally, adjust code style for checkpatch. To: Jan Kara Link: https://lore.kernel.org/r/20210329065402.3297092-3-ira.weiny@intel.com Signed-off-by: Ira Weiny Signed-off-by: Jan Kara