linux-dev/fs/ramfs, branch master

Merge tag 'pull-tmpfile' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2022-10-11T02:45:17Z

Pull vfs tmpfile updates from Al Viro: "Miklos' ->tmpfile() signature change; pass an unopened struct file to it, let it open the damn thing. Allows to add tmpfile support to FUSE" * tag 'pull-tmpfile' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: fuse: implement ->tmpfile() vfs: open inside ->tmpfile() vfs: move open right after ->tmpfile() vfs: make vfs_tmpfile() static ovl: use vfs_tmpfile_open() helper cachefiles: use vfs_tmpfile_open() helper cachefiles: only pass inode to *mark_inode_inuse() helpers cachefiles: tmpfile error handling cleanup hugetlbfs: cleanup mknod and tmpfile vfs: add vfs_tmpfile_open() helper

vfs: open inside ->tmpfile()

2022-09-24T05:00:00Z

This is in preparation for adding tmpfile support to fuse, which requires that the tmpfile creation and opening are done as a single operation. Replace the 'struct dentry *' argument of i_op->tmpfile with 'struct file *'. Call finish_open_simple() as the last thing in ->tmpfile() instances (may be omitted in the error case). Change d_tmpfile() argument to 'struct file *' as well to make callers more readable. Reviewed-by: Christian Brauner (Microsoft) Signed-off-by: Miklos Szeredi

ramfs: convert ramfs_nommu_get_unmapped_area() to use filemap_get_folios_contig()

2022-09-12T03:26:03Z

Convert to use folios throughout. This is in preparation for the removal for find_get_pages_contig(). Now also supports large folios. The initial version of this function set the page_address to be returned after finishing all the checks. Since folio_batches have a maximum of 15 folios, the function had to be modified to support getting and checking up to lpages, 15 pages at a time while still returning the initial page address. Now the function sets ret as soon as the first batch arrives, and updates it only if a check fails. The physical adjacency check utilizes the page frame numbers. The page frame number of each folio must be nr_pages away from the first folio. Link: https://lkml.kernel.org/r/20220824004023.77310-7-vishal.moola@gmail.com Signed-off-by: Vishal Moola (Oracle) Cc: Al Viro Cc: Chris Mason Cc: David Sterba Cc: David Sterba Cc: Josef Bacik Cc: Matthew Wilcox Cc: Ryusuke Konishi Signed-off-by: Andrew Morton

Merge branch 'akpm' (patches from Andrew)

2021-11-09T18:11:53Z

Merge more updates from Andrew Morton: "87 patches. Subsystems affected by this patch series: mm (pagecache and hugetlb), procfs, misc, MAINTAINERS, lib, checkpatch, binfmt, kallsyms, ramfs, init, codafs, nilfs2, hfs, crash_dump, signals, seq_file, fork, sysvfs, kcov, gdb, resource, selftests, and ipc" * emailed patches from Andrew Morton : (87 commits) ipc/ipc_sysctl.c: remove fallback for !CONFIG_PROC_SYSCTL ipc: check checkpoint_restore_ns_capable() to modify C/R proc files selftests/kselftest/runner/run_one(): allow running non-executable files virtio-mem: disallow mapping virtio-mem memory via /dev/mem kernel/resource: disallow access to exclusive system RAM regions kernel/resource: clean up and optimize iomem_is_exclusive() scripts/gdb: handle split debug for vmlinux kcov: replace local_irq_save() with a local_lock_t kcov: avoid enable+disable interrupts if !in_task() kcov: allocate per-CPU memory on the relevant node Documentation/kcov: define `ip' in the example Documentation/kcov: include types.h in the example sysv: use BUILD_BUG_ON instead of runtime check kernel/fork.c: unshare(): use swap() to make code cleaner seq_file: fix passing wrong private data seq_file: move seq_escape() to a header signal: remove duplicate include in signal.h crash_dump: remove duplicate include in crash_dump.h crash_dump: fix boolreturn.cocci warning hfs/hfsplus: use WARN_ON for sanity check ...

ramfs: fix mount source show for ramfs

2021-11-09T18:02:51Z

ramfs_parse_param does not parse key "source", and will convert -ENOPARAM to 0. This will skip vfs_parse_fs_param_source in vfs_parse_fs_param, which lead always "none" mount source for ramfs. Fix it by parsing "source" in ramfs_parse_param like cgroup1_parse_param does. Link: https://lkml.kernel.org/r/20210924091756.1906118-1-yangerkun@huawei.com Signed-off-by: yangerkun Cc: Al Viro Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm: don't include in

2021-10-18T12:17:01Z

There is no need to pull blk-cgroup.h and thus blkdev.h in here, so break the include chain. Signed-off-by: Christoph Hellwig Reviewed-by: Johannes Thumshirn Link: https://lore.kernel.org/r/20210920123328.1399408-3-hch@lst.de Signed-off-by: Jens Axboe

fs: move ramfs_aops to libfs

2021-06-29T17:53:48Z

Move the ramfs aops to libfs and reuse them for kernfs and configfs. Thosw two did not wire up ->set_page_dirty before and now get __set_page_dirty_no_writeback, which is the right one for no-writeback address_space usage. Drop the now unused exports of the libfs helpers only used for ramfs-style pagecache usage. Link: https://lkml.kernel.org/r/20210614061512.3966143-3-hch@lst.de Signed-off-by: Christoph Hellwig Reviewed-by: Greg Kroah-Hartman Reviewed-by: Jan Kara Cc: Al Viro Cc: Matthew Wilcox (Oracle) Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

ramfs: support O_TMPFILE

2021-02-24T21:38:26Z

[akpm@linux-foundation.org: update inode_operations.tmpfile] Link: http://lkml.kernel.org/r/20190206073349.GA15311@avx2 Signed-off-by: Alexey Dobriyan Acked-by: Christian Brauner Cc: Al Viro Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

fs: make helpers idmap mount aware

2021-01-24T13:27:20Z

Extend some inode methods with an additional user namespace argument. A filesystem that is aware of idmapped mounts will receive the user namespace the mount has been marked with. This can be used for additional permission checking and also to enable filesystems to translate between uids and gids if they need to. We have implemented all relevant helpers in earlier patches. As requested we simply extend the exisiting inode method instead of introducing new ones. This is a little more code churn but it's mostly mechanical and doesnt't leave us with additional inode methods. Link: https://lore.kernel.org/r/20210121131959.646623-25-christian.brauner@ubuntu.com Cc: Christoph Hellwig Cc: David Howells Cc: Al Viro Cc: linux-fsdevel@vger.kernel.org Reviewed-by: Christoph Hellwig Signed-off-by: Christian Brauner

attr: handle idmapped mounts

2021-01-24T13:27:16Z

When file attributes are changed most filesystems rely on the setattr_prepare(), setattr_copy(), and notify_change() helpers for initialization and permission checking. Let them handle idmapped mounts. If the inode is accessed through an idmapped mount map it into the mount's user namespace. Afterwards the checks are identical to non-idmapped mounts. If the initial user namespace is passed nothing changes so non-idmapped mounts will see identical behavior as before. Helpers that perform checks on the ia_uid and ia_gid fields in struct iattr assume that ia_uid and ia_gid are intended values and have already been mapped correctly at the userspace-kernelspace boundary as we already do today. If the initial user namespace is passed nothing changes so non-idmapped mounts will see identical behavior as before. Link: https://lore.kernel.org/r/20210121131959.646623-8-christian.brauner@ubuntu.com Cc: Christoph Hellwig Cc: David Howells Cc: Al Viro Cc: linux-fsdevel@vger.kernel.org Reviewed-by: Christoph Hellwig Signed-off-by: Christian Brauner