- 21 Aug, 2023 9 commits
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Christoph Hellwig authored
BLKFLSBUF is a historic ioctl that is called on a file handle to a block device and syncs either the file system mounted on that block device if there is one, or otherwise the just the data on the block device. Replace the get_super based syncing with a holder operation to remove the last usage of get_super, and to also support syncing the file system if the block device is not the main block device stored in s_dev. Signed-off-by:
Christoph Hellwig <hch@lst.de> Reviewed-by:
Josef Bacik <josef@toxicpanda.com> Message-Id: <20230811100828.1897174-16-hch@lst.de> Signed-off-by:
Christian Brauner <brauner@kernel.org>
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Christoph Hellwig authored
Combine the newly merged bdev_mark_dead helper with the existing mark_dead holder operation so that all operations that invalidate a device that is dead or being removed now go through the holder ops. This allows file systems to explicitly shutdown either ASAP (for a surprise removal) or after writing back data (for an orderly removal), and do so not only for the main device. Signed-off-by:
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Christoph Hellwig authored
We currently have two interfaces that take a block_devices and the find a mounted file systems to flush or invaldidate data on it. Both are a bit problematic because they only work for the "main" block devices that is used as s_dev for the super_block, and because they don't call into the file system at all. Merge the two into a new bdev_mark_dead helper that does both the syncing and invalidation and which is properly documented. This is in preparation of merging the functionality into the ->mark_dead holder operation so that it will work on additional block devices used by a file systems and give us a single entry point for invalidation of dead devices or media. Note that a single standalone fsync_bdev call for an obscure ioctl remains for now, but that one will also be deal with in a bit. Signed-off-by:
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Christoph Hellwig authored
This message isn't exactly helpful, and file systems already print way more useful messages when shut down while active. Signed-off-by:
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Christoph Hellwig authored
Don't just write out the data, but also invalidate all caches when setting the device offline. Stop canceling the offlining when writeback fails as there is no way to recover from that anyway. Signed-off-by:
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Christoph Hellwig authored
FDFMTBEG is used by fdformat to calibrate before formatting a disk. Neither the atari nor PC floppy driver sync data, which also seems a bit pointless for a disk hat is about to get formatted. Signed-off-by:
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Christoph Hellwig authored
While changing the format of a floppy isn't strictly speaking a media change, the effects are the same in that the content of the media changes and the diskseq should be increased and uevent should be sent. Switch from calling __invalidate_device to disk_force_media_change to do so. Signed-off-by:
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Christoph Hellwig authored
Hard code the events to DISK_EVENT_MEDIA_CHANGE as that is the only useful use case, and drop the superfluous return value. Signed-off-by:
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Christoph Hellwig authored
nbd_clear_sock_ioctl kills the socket and with that the block device. Instead of just invalidating file system buffers, mark the device as dead, which will also invalidate the buffers as part of the proper shutdown sequence. This also includes invalidating partitions if there are any. Signed-off-by:
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- 11 Aug, 2023 7 commits
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Christoph Hellwig authored
Use the generic fs_holder_ops to shut down the file system when the log or RT device goes away instead of duplicating the logic. Signed-off-by:
"Darrick J. Wong" <djwong@kernel.org> Message-Id: <20230802154131.2221419-13-hch@lst.de> Signed-off-by:
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Christoph Hellwig authored
Just like get_tree_bdev needs to drop s_umount when opening the main device, we need to do the same for the xfs log and RT devices to avoid a potential lock order reversal with s_unmount for the mark_dead path. It might be preferable to just drop s_umount over ->fill_super entirely, but that will require a fairly massive audit first, so we'll do the easy version here first. Signed-off-by:
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Christoph Hellwig authored
Use the generic fs_holder_ops to shut down the file system when the log device goes away instead of duplicating the logic. Signed-off-by:
Jan Kara <jack@suse.cz> Message-Id: <20230802154131.2221419-11-hch@lst.de> Signed-off-by:
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Christoph Hellwig authored
Just like get_tree_bdev needs to drop s_umount when opening the main device, we need to do the same for the ext4 log device to avoid a potential lock order reversal with s_unmount for the mark_dead path. It might be preferable to just drop s_umount over ->fill_super entirely, but that will require a fairly massive audit first, so we'll do the easy version here first. Signed-off-by:
Theodore Ts'o <tytso@mit.edu> Reviewed-by:
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Christoph Hellwig authored
Export fs_holder_ops so that file systems that open additional block devices can use it as well. Signed-off-by:
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Christoph Hellwig authored
fs_mark_dead currently uses get_super to find the superblock for the block device that is going away. This means it is limited to the main device stored in sb->s_dev, leading to a lot of code duplication for file systems that can use multiple block devices. Now that the holder for all block devices used by file systems is set to the super_block, we can instead look at that holder and then check if the file system is born and active, so do that instead. Signed-off-by:
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Christoph Hellwig authored
The file system type is not a very useful holder as it doesn't allow us to go back to the actual file system instance. Pass the super_block instead which is useful when passed back to the file system driver. Signed-off-by:
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- 10 Aug, 2023 17 commits
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Christoph Hellwig authored
Check for sb->s_type which is the right place to look at the file system type, not the holder, which is just an implementation detail in the VFS helpers. Signed-off-by:
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Christoph Hellwig authored
Use the generic setup_bdev_super helper to open the main block device and do various bits of superblock setup instead of duplicating the logic. This includes moving to the new scheme implemented in common code that only opens the block device after the superblock has allocated. It does not yet convert nilfs2 to the new mount API, but doing so will become a bit simpler after this first step. Signed-off-by:
Ryusuke Konishi <konishi.ryusuke@gmail.com> Message-Id: <20230802154131.2221419-3-hch@lst.de> Signed-off-by:
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Christoph Hellwig authored
We'll want to use setup_bdev_super instead of duplicating it in nilfs2. Signed-off-by:
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Jan Kara authored
Currently get_tree_bdev and mount_bdev open the block device before committing to allocating a super block. That creates problems for restricting the number of writers to a device, and also leads to a unusual and not very helpful holder (the fs_type). Reorganize the super block code to first look whether the superblock for a particular device does already exist and open the block device only if it doesn't. [hch: port to before the bdev_handle changes, duplicate the bdev read-only check from blkdev_get_by_path, extend the fsfree_mutex coverage to protect against freezes, fix an open bdev leak when the bdev is frozen, use the bdev local variable more, rename the s variable to sb to be more descriptive] [brauner: remove references to mounts as they're mostly irrelevant] [brauner & hch: fold fixes for romfs and cramfs for syzbot+2faac0423fdc9692822b@syzkaller.appspotmail.com] Signed-off-by: -
Christoph Hellwig authored
As a rule of thumb everything allocated to the fs_context and moved into the super_block should be freed by ->kill_sb so that the teardown handling doesn't need to be duplicated between the fill_super error path and put_super. Implement an ntfs3-specific kill_sb method to do that. Signed-off-by:
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Christoph Hellwig authored
kill_block_super will call sync_blockdev just a tad later already. Signed-off-by:
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Christoph Hellwig authored
put_ntfs is a rather unconventional name for a function that frees the sbi and associated resources. Give it a more descriptive name and drop the duplicate name in the top of the function comment. Signed-off-by:
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Christoph Hellwig authored
As a rule of thumb everything allocated to the fs_context and moved into the super_block should be freed by ->kill_sb so that the teardown handling doesn't need to be duplicated between the fill_super error path and put_super. Implement an exfat-specific kill_sb method to do that and share the code with the mount contex free helper for the mount error handling case. Signed-off-by:
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Christoph Hellwig authored
There are no RCU critical sections for accessing any information in the sbi, so drop the call_rcu indirection for freeing the sbi. Signed-off-by:
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Christoph Hellwig authored
blkdev_put must not be called under sb->s_umount to avoid a lock order reversal with disk->open_mutex. Move closing the external journal device into ->kill_sb to archive that. Signed-off-by:
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Christoph Hellwig authored
Copy and paste the commit message from Darrick into a comment to explain the seemingly odd invalidate_bdev in xfs_shutdown_devices. Signed-off-by:
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Christoph Hellwig authored
blkdev_put must not be called under sb->s_umount to avoid a lock order reversal with disk->open_mutex. Move closing the buftargs into ->kill_sb to archive that. Note that the flushing of the disk caches and block device mapping invalidated needs to stay in ->put_super as the main block device is closed in kill_block_super already. Signed-off-by:
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Christoph Hellwig authored
Closing the block devices logically belongs into xfs_free_buftarg, So instead of open coding it in the caller move it there and add a check for the s_bdev so that the main device isn't close as that's done by the VFS helper. Signed-off-by:
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Christoph Hellwig authored
There isn't much use for this trivial wrapper, especially as the NULL check is only needed in a single call site. Signed-off-by:
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Christoph Hellwig authored
As a rule of thumb everything allocated to the fs_context and moved into the super_block should be freed by ->kill_sb so that the teardown handling doesn't need to be duplicated between the fill_super error path and put_super. Implement a XFS-specific kill_sb method to do that. Signed-off-by:
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Christoph Hellwig authored
->put_super is only called when sb->s_root is set, and thus when fill_super succeeds. Thus drop the NULL check that can't happen in xfs_fs_put_super. Signed-off-by:
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Christoph Hellwig authored
The xfs_fs_free prototype formatting is a weird mix of the classic XFS style and the Linux style. Fix it up to be consistent. Signed-off-by:
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- 09 Aug, 2023 4 commits
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Christoph Hellwig authored
bdev->bd_super is unused now, remove it. Signed-off-by:
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Christoph Hellwig authored
All ocfs2 journal error handling and logging is based on buffer_heads, and the owning inode and thus super_block can be retrieved through bh->b_assoc_map->host. Switch to using that to remove the last users of bdev->bd_super. Signed-off-by:
Joseph Qi <joseph.qi@linux.alibaba.com> Message-Id: <20230807112625.652089-4-hch@lst.de> Signed-off-by:
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Christoph Hellwig authored
__ext4_journal_get_write_access already has a super_block available, and there is no need to go from that to the bdev to go back to the owning super_block. Signed-off-by:
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Christoph Hellwig authored
bdev->bd_super is a somewhat awkward backpointer from a block device to an owning file system with unclear rules. For the buffer_head code we already have a good backpointer for the inode that the buffer_head is associated with, even if it lives on the block device mapping: b_assoc_map. It is used track dirty buffers associated with an inode but living on the block device mapping like directory buffers in ext4. mark_buffer_write_io_error already uses it for the call to mapping_set_error, and should be doing the same for the per-sb error sequence. Signed-off-by:
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- 09 Jul, 2023 3 commits
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Linus Torvalds authored
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Linus Torvalds authored
We just sorted the entries and fields last release, so just out of a perverse sense of curiosity, I decided to see if we can keep things ordered for even just one release. The answer is "No. No we cannot". I suggest that all kernel developers will need weekly training sessions, involving a lot of Big Bird and Sesame Street. And at the yearly maintainer summit, we will all sing the alphabet song together. I doubt I will keep doing this. At some point "perverse sense of curiosity" turns into just a cold dark place filled with sadness and despair. Repeats: 80e62bc8 ("MAINTAINERS: re-sort all entries and fields") Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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git://git.infradead.org/users/hch/dma-mappingLinus Torvalds authored
Pull dma-mapping fixes from Christoph Hellwig: - swiotlb area sizing fixes (Petr Tesarik) * tag 'dma-mapping-6.5-2023-07-09' of git://git.infradead.org/users/hch/dma-mapping: swiotlb: reduce the number of areas to match actual memory pool size swiotlb: always set the number of areas before allocating the pool
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