kernel/linux.git/drivers/mtd/mtdsuper.c, branch v6.6.133

mtd: key superblock by device number

2023-08-31T10:47:15+00:00

The mtd driver has similar problems than the one that was fixed in commit dc3216b14160 ("super: ensure valid info"). The kill_mtd_super() helper calls shuts the superblock down but leaves the superblock on fs_supers as the devices are still in use but puts the mtd device and cleans out the superblock's s_mtd field. This means another mounter can find the superblock on the list accessing its s_mtd field while it is curently in the process of being freed or already freed. Prevent that from happening by keying superblock by dev_t just as we do in the generic code. Link: https://lore.kernel.org/linux-fsdevel/20230829-weitab-lauwarm-49c40fc85863@brauner Acked-by: Richard Weinberger Reviewed-by: Jan Kara Reviewed-by: Christoph Hellwig Message-Id: <20230829-vfs-super-mtd-v1-2-fecb572e5df3@kernel.org> Signed-off-by: Christian Brauner

mm: don't include in

2021-10-18T12:17:01+00:00

Move inode_to_bdi out of line to avoid having to include blkdev.h. Signed-off-by: Christoph Hellwig Reviewed-by: Johannes Thumshirn Link: https://lore.kernel.org/r/20210920123328.1399408-4-hch@lst.de Signed-off-by: Jens Axboe

block: remove i_bdev

2020-12-01T21:53:39+00:00

Switch the block device lookup interfaces to directly work with a dev_t so that struct block_device references are only acquired by the blkdev_get variants (and the blk-cgroup special case). This means that we now don't need an extra reference in the inode and can generally simplify handling of struct block_device to keep the lookups contained in the core block layer code. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara Reviewed-by: Hannes Reinecke Acked-by: Tejun Heo Acked-by: Coly Li [bcache] Signed-off-by: Jens Axboe

mtd: Kill mount_mtd()

2019-09-05T18:34:26+00:00

Kill mount_mtd() as it has now been replaced by vfs_get_mtd_super() in the new mount API and nothing now uses it. Signed-off-by: David Howells cc: David Woodhouse cc: Brian Norris cc: Boris Brezillon cc: Marek Vasut cc: Richard Weinberger cc: linux-mtd@lists.infradead.org Signed-off-by: Al Viro

mtd: Provide fs_context-aware mount_mtd() replacement

2019-09-05T18:34:23+00:00

Provide a function, get_tree_mtd(), to replace mount_mtd(), using an fs_context struct to hold the parameters. Signed-off-by: David Howells cc: David Woodhouse cc: Brian Norris cc: Boris Brezillon cc: Marek Vasut cc: Richard Weinberger cc: linux-mtd@lists.infradead.org Signed-off-by: Al Viro

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152

2019-05-30T18:26:32+00:00

Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman

Rename superblock flags (MS_xyz -> SB_xyz)

2017-11-27T21:05:09+00:00

This is a pure automated search-and-replace of the internal kernel superblock flags. The s_flags are now called SB_*, with the names and the values for the moment mirroring the MS_* flags that they're equivalent to. Note how the MS_xyz flags are the ones passed to the mount system call, while the SB_xyz flags are what we then use in sb->s_flags. The script to do this was: # places to look in; re security/*: it generally should *not* be # touched (that stuff parses mount(2) arguments directly), but # there are two places where we really deal with superblock flags. FILES="drivers/mtd drivers/staging/lustre fs ipc mm \ include/linux/fs.h include/uapi/linux/bfs_fs.h \ security/apparmor/apparmorfs.c security/apparmor/include/lib.h" # the list of MS_... constants SYMS="RDONLY NOSUID NODEV NOEXEC SYNCHRONOUS REMOUNT MANDLOCK \ DIRSYNC NOATIME NODIRATIME BIND MOVE REC VERBOSE SILENT \ POSIXACL UNBINDABLE PRIVATE SLAVE SHARED RELATIME KERNMOUNT \ I_VERSION STRICTATIME LAZYTIME SUBMOUNT NOREMOTELOCK NOSEC BORN \ ACTIVE NOUSER" SED_PROG= for i in $SYMS; do SED_PROG="$SED_PROG -e s/MS_$i/SB_$i/g"; done # we want files that contain at least one of MS_..., # with fs/namespace.c and fs/pnode.c excluded. L=$(for i in $SYMS; do git grep -w -l MS_$i $FILES; done| sort|uniq|grep -v '^fs/namespace.c'|grep -v '^fs/pnode.c') for f in $L; do sed -i $f $SED_PROG; done Requested-by: Al Viro Signed-off-by: Linus Torvalds

fs: Remove SB_I_DYNBDI flag

2017-04-20T18:09:55+00:00

Now that all bdi structures filesystems use are properly refcounted, we can remove the SB_I_DYNBDI flag. Reviewed-by: Christoph Hellwig Signed-off-by: Jan Kara Signed-off-by: Jens Axboe

mtd: Convert to dynamically allocated bdi infrastructure

2017-04-20T18:09:55+00:00

MTD already allocates backing_dev_info dynamically. Convert it to use generic infrastructure for this including proper refcounting. We drop mtd->backing_dev_info as its only use was to pass mtd_bdi pointer from one file into another and if we wanted to keep that in a clean way, we'd have to make mtd hold and drop bdi reference as needed which seems pointless for passing one global pointer... CC: David Woodhouse CC: Brian Norris CC: linux-mtd@lists.infradead.org Reviewed-by: Christoph Hellwig Signed-off-by: Jan Kara Signed-off-by: Jens Axboe

mtd: Move major number definitions to major.h

2013-11-07T07:32:59+00:00

This patch moves the char and block major number definitions to major.h to be with the rest of the major numbers. While doing this, include major.h in the files that need it. Signed-off-by: Ezequiel Garcia Signed-off-by: Brian Norris