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1,294,546 commits
| Author | SHA1 | Message | Date | |
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Paul E. McKenney
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8d0f9a6639 |
rcutorture: Remove extraneous rcu_torture_pipe_update_one() READ_ONCE()
The rcu_torture_pipe_update_one() cannot run concurrently with any updates of ->rtort_pipe_count, so this commit removes the extraneous READ_ONCE() from the read from this field. Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Closes: https://lore.kernel.org/lkml/CAHk-=wiX_zF5Mpt8kUm_LFQpYY-mshrXJPOe+wKNwiVhEUcU9g@mail.gmail.com/ Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org> Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com> |
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Christian Brauner
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74871791ff |
ntfs3: serve as alias for the legacy ntfs driver
Johan Hovold reported that removing the legacy ntfs driver broke boot
for him since his fstab uses the legacy ntfs driver to access firmware
from the original Windows partition.
Use ntfs3 as an alias for legacy ntfs if CONFIG_NTFS_FS is selected.
This is similar to how ext3 is treated.
Link: https://lore.kernel.org/r/Zf2zPf5TO5oYt3I3@hovoldconsulting.com
Link: https://lore.kernel.org/r/20240325-hinkriegen-zuziehen-d7e2c490427a@brauner
Fixes:
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Russell King (Oracle)
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62d6d91db9 |
net: dsa: mt7530: provide own phylink MAC operations
Convert mt753x to provide its own phylink MAC operations, thus avoiding the shim layer in DSA's port.c Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Tested-by: Arınç ÜNAL <arinc.unal@arinc9.com> Link: https://lore.kernel.org/r/E1rvIco-006bQu-Fq@rmk-PC.armlinux.org.uk Signed-off-by: Paolo Abeni <pabeni@redhat.com> |
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Russell King (Oracle)
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94c437edce |
net: dsa: lantiq_gswip: provide own phylink MAC operations
Convert lantiq_gswip to provide its own phylink MAC operations, thus avoiding the shim layer in DSA's port.c. For lantiq_gswip, it means we end up with a common instance of phylink MAC operations that are shared between the different variants, rather than having duplicated initialisers in dsa_switch_ops. Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Link: https://lore.kernel.org/r/E1rvIcj-006bQo-B3@rmk-PC.armlinux.org.uk Signed-off-by: Paolo Abeni <pabeni@redhat.com> |
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Russell King (Oracle)
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636d022cd5 |
net: dsa: qca8k: provide own phylink MAC operations
Convert qca8k to provide its own phylink MAC operations, thus avoiding the shim layer in DSA's port.c. Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Reviewed-by: Vladimir Oltean <olteanv@gmail.com> Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com> Link: https://lore.kernel.org/r/E1rvIce-006bQi-58@rmk-PC.armlinux.org.uk Signed-off-by: Paolo Abeni <pabeni@redhat.com> |
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Russell King (Oracle)
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e3ef87ef40 |
net: dsa: ar9331: provide own phylink MAC operations
Convert ar9331 to provide its own phylink MAC operations, thus avoiding the shim layer in DSA's port.c. Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Reviewed-by: Vladimir Oltean <olteanv@gmail.com> Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com> Link: https://lore.kernel.org/r/E1rvIcZ-006bQc-0W@rmk-PC.armlinux.org.uk Signed-off-by: Paolo Abeni <pabeni@redhat.com> |
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Russell King (Oracle)
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0be9a1e43a |
net: dsa: sja1105: provide own phylink MAC operations
Convert sja1105 to provide its own phylink MAC operations, thus avoiding the shim layer in DSA's port.c Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com> Link: https://lore.kernel.org/r/E1rvIcT-006bQW-S3@rmk-PC.armlinux.org.uk Signed-off-by: Paolo Abeni <pabeni@redhat.com> |
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Christophe JAILLET
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45bf5edd0f |
HID: sony: Remove usage of the deprecated ida_simple_xx() API
ida_alloc() and ida_free() should be preferred to the deprecated ida_simple_get() and ida_simple_remove(). This is less verbose. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Jiri Kosina <jkosina@suse.com> |
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Chandan Babu R
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9cb5f15d88 |
xfs: retain ILOCK during directory updates [v13.2 16/16]
This series changes the directory update code to retain the ILOCK on all files involved in a rename until the end of the operation. The upcoming parent pointers patchset applies parent pointers in a separate chained update from the actual directory update, which is why it is now necessary to keep the ILOCK instead of dropping it after the first transaction in the chain. As a side effect, we no longer need to hold the IOLOCK during an rmapbt scan of inodes to serialize the scan with ongoing directory updates. This has been running on the djcloud for months with no problems. Enjoy! Signed-off-by: Darrick J. Wong <djwong@kernel.org> -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQQ2qTKExjcn+O1o2YRKO3ySh0YRpgUCZh23VAAKCRBKO3ySh0YR phqUAP9ACvKuSe7BN1PYvnSTWJ27Kfzy1u9AnMivsKjaWRW2AQEAiYsDs2La+B2m Z7pdfAX6U6id5D4F9zGm1nIu08ChCQs= =/hm0 -----END PGP SIGNATURE----- Merge tag 'retain-ilock-during-dir-ops-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux into xfs-6.10-mergeA xfs: retain ILOCK during directory updates This series changes the directory update code to retain the ILOCK on all files involved in a rename until the end of the operation. The upcoming parent pointers patchset applies parent pointers in a separate chained update from the actual directory update, which is why it is now necessary to keep the ILOCK instead of dropping it after the first transaction in the chain. As a side effect, we no longer need to hold the IOLOCK during an rmapbt scan of inodes to serialize the scan with ongoing directory updates. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Chandan Babu R <chandanbabu@kernel.org> * tag 'retain-ilock-during-dir-ops-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux: xfs: unlock new repair tempfiles after creation xfs: don't pick up IOLOCK during rmapbt repair scan xfs: Hold inode locks in xfs_rename xfs: Hold inode locks in xfs_trans_alloc_dir xfs: Hold inode locks in xfs_ialloc xfs: Increase XFS_QM_TRANS_MAXDQS to 5 xfs: Increase XFS_DEFER_OPS_NR_INODES to 5 |
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Chandan Babu R
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f910defd38 |
xfs: design documentation for online fsck, part 2 [v13.2 15/16]
This series updates the design documentation for online fsck to reflect the final design of the parent pointers feature as well as the implementation of online fsck for the new metadata. This has been running on the djcloud for months with no problems. Enjoy! Signed-off-by: Darrick J. Wong <djwong@kernel.org> -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQQ2qTKExjcn+O1o2YRKO3ySh0YRpgUCZh23VAAKCRBKO3ySh0YR pg9gAP4kwa111TCKBZjr6hMpV0isKfKUWNjbO4pTEKmKM/fDBgEAssk71ReCpEt2 rPv88LnXyce/bWgvFb3wDjxFo2ucvAU= =myBE -----END PGP SIGNATURE----- Merge tag 'online-fsck-design-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux into xfs-6.10-mergeA xfs: design documentation for online fsck, part 2 This series updates the design documentation for online fsck to reflect the final design of the parent pointers feature as well as the implementation of online fsck for the new metadata. This has been running on the djcloud for months with no problems. Enjoy! Signed-off-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Chandan Babu R <chandanbabu@kernel.org> * tag 'online-fsck-design-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux: docs: describe xfs directory tree online fsck docs: update offline parent pointer repair strategy docs: update online directory and parent pointer repair sections docs: update the parent pointers documentation to the final version |
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Kang Yang
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0531825408 |
wifi: ath12k: dynamically update peer puncturing bitmap for STA
Every time EHT Operation element changed, mac80211 will parse it and extract the valid puncturing bitmap according to the bandwidth. Current driver only update puncturing bitmap to firmware as vdev parameter. Which can only meet the needs of AP. But STA will also use it as peer parameter. If only update as vdev parameter, might cause firmware crash. QCN9274 is the same. So update bandwidth and puncturing bitmap as peer parameters once they changed for STA. Then send them to the firmware by WMI event. Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3 Signed-off-by: Kang Yang <quic_kangyang@quicinc.com> Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com> Link: https://msgid.link/20240408083047.22548-1-quic_kangyang@quicinc.com |
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Chandan Babu R
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6ad1b91470 |
xfs: less heavy locks during fstrim [v30.3 14/16]
Congratulations! You have made it to the final patchset of the main online fsck feature! This patchset fixes some stalling behavior that I observed when running FITRIM against large flash-based filesystems with very heavily fragmented free space data. In summary -- the current fstrim implementation optimizes for trimming the largest free extents first, and holds the AGF lock for the duration of the operation. This is great if fstrim is being run as a foreground process by a sysadmin. For xfs_scrub, however, this isn't so good -- we don't really want to block on one huge kernel call while reporting no progress information. We don't want to hold the AGF so long that background processes stall. These problems are easily fixable by issuing smaller FITRIM calls, but there's still the problem of walking the entire cntbt. To solve that second problem, we introduce a new sub-AG FITRIM implementation. To solve the first problem, make it relax the AGF periodically. This has been running on the djcloud for months with no problems. Enjoy! Signed-off-by: Darrick J. Wong <djwong@kernel.org> -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQQ2qTKExjcn+O1o2YRKO3ySh0YRpgUCZh23VAAKCRBKO3ySh0YR pnLkAP9dlH5LKtJLK7Wbl3GC0EjPBUaX6a/nmkJPBIMocdautAD/X6J8ItPkx885 26qzJSXeapMIXVS1olUPuUL6B3jW/gE= =HS4c -----END PGP SIGNATURE----- Merge tag 'discard-relax-locks-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux into xfs-6.10-mergeA xfs: less heavy locks during fstrim Congratulations! You have made it to the final patchset of the main online fsck feature! This patchset fixes some stalling behavior that I observed when running FITRIM against large flash-based filesystems with very heavily fragmented free space data. In summary -- the current fstrim implementation optimizes for trimming the largest free extents first, and holds the AGF lock for the duration of the operation. This is great if fstrim is being run as a foreground process by a sysadmin. For xfs_scrub, however, this isn't so good -- we don't really want to block on one huge kernel call while reporting no progress information. We don't want to hold the AGF so long that background processes stall. These problems are easily fixable by issuing smaller FITRIM calls, but there's still the problem of walking the entire cntbt. To solve that second problem, we introduce a new sub-AG FITRIM implementation. To solve the first problem, make it relax the AGF periodically. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Chandan Babu R <chandanbabu@kernel.org> * tag 'discard-relax-locks-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux: xfs: fix performance problems when fstrimming a subset of a fragmented AG |
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Karthikeyan Periyasamy
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f351772c54 |
wifi: ath12k: fix mac id extraction when MSDU spillover in rx error path
Currently, in the rx error data path, mac id is extracted from the last 64bits of MSDU end description tag for each entry received in the WBM error ring. Then, each entry will be updated into the MSDU list for further processing. The extracted mac id is valid when a single MSDU is not fragmented and received in the WBM error ring. In scenarios where the size of a single MSDU received exceeds the descriptor buffer size, resulting in fragmented or spillover MSDU entries into the WBM error ring. In this case, the extracted mac id from each spillover entry is invalid except the last spillover entry of the MSDU. This invalid mac id leads to packet rejection. To address this issue, check if the MSDU continuation flag is set, then extract the valid mac id from the last spillover entry. Propagate the valid mac id to all the spillover entries of the single MSDU in the temporary MSDU list(scatter_msdu_list). Then, update this into the MSDU list (msdu_list) for further processing. Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-QCAHKSWPL_SILICONZ-1 Signed-off-by: Karthikeyan Periyasamy <quic_periyasa@quicinc.com> Signed-off-by: Nithyanantham Paramasivam <quic_nithp@quicinc.com> Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com> Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com> Link: https://msgid.link/20240404141538.1277258-1-quic_nithp@quicinc.com |
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Chandan Babu R
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9ba8e658d8 |
xfs: inode-related repair fixes [v30.3 13/16]
While doing QA of the online fsck code, I made a few observations:
First, nobody was checking that the di_onlink field is actually zero;
Second, that allocating a temporary file for repairs can fail (and
thus bring down the entire fs) if the inode cluster is corrupt; and
Third, that file link counts do not pin at ~0U to prevent integer
overflows. Fourth, the x{chk,rep}_metadata_inode_fork functions
should be subclassing the main scrub context, not modifying the
parent's setup willy-nilly.
This scattered patchset fixes those three problems.
This has been running on the djcloud for months with no problems. Enjoy!
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Merge tag 'inode-repair-improvements-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux into xfs-6.10-mergeA
xfs: inode-related repair fixes
While doing QA of the online fsck code, I made a few observations:
First, nobody was checking that the di_onlink field is actually zero;
Second, that allocating a temporary file for repairs can fail (and
thus bring down the entire fs) if the inode cluster is corrupt; and
Third, that file link counts do not pin at ~0U to prevent integer
overflows. Fourth, the x{chk,rep}_metadata_inode_fork functions
should be subclassing the main scrub context, not modifying the
parent's setup willy-nilly.
This scattered patchset fixes those three problems.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
* tag 'inode-repair-improvements-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux:
xfs: create subordinate scrub contexts for xchk_metadata_inode_subtype
xfs: pin inodes that would otherwise overflow link count
xfs: try to avoid allocating from sick inode clusters
xfs: check unused nlink fields in the ondisk inode
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Chandan Babu R
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1eef01250d |
xfs: online fsck of iunlink buckets [v30.3 12/16]
This series enhances the AGI scrub code to check the unlinked inode bucket lists for errors, and fixes them if necessary. Now that iunlink pointer updates are virtual log items, we can batch updates pretty efficiently in the logging code. This has been running on the djcloud for months with no problems. Enjoy! Signed-off-by: Darrick J. Wong <djwong@kernel.org> -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQQ2qTKExjcn+O1o2YRKO3ySh0YRpgUCZh23VAAKCRBKO3ySh0YR piMPAP4+198X70x14t7HIrNy5qDud0RmzG8aLVL1wKm3LGG4mQD/Vm68M74Dua1O pNviXZNaY0fhboehNBzwCkS8mvf0aQI= =e3hD -----END PGP SIGNATURE----- Merge tag 'repair-iunlink-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux into xfs-6.10-mergeA xfs: online fsck of iunlink buckets This series enhances the AGI scrub code to check the unlinked inode bucket lists for errors, and fixes them if necessary. Now that iunlink pointer updates are virtual log items, we can batch updates pretty efficiently in the logging code. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Chandan Babu R <chandanbabu@kernel.org> * tag 'repair-iunlink-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux: xfs: repair AGI unlinked inode bucket lists xfs: hoist AGI repair context to a heap object xfs: check AGI unlinked inode buckets |
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Jiri Slaby (SUSE)
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35fad98ed2 |
serial: meson+qcom: don't advance the kfifo twice
Marek reports, that the -next commit |
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Chandan Babu R
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0313dd8fac |
xfs: online repair of symbolic links [v30.3 11/16]
The patches in this set adds the ability to repair the target buffer of a symbolic link, using the same salvage, rebuild, and swap strategy used everywhere else. This has been running on the djcloud for months with no problems. Enjoy! Signed-off-by: Darrick J. Wong <djwong@kernel.org> -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQQ2qTKExjcn+O1o2YRKO3ySh0YRpgUCZh23UwAKCRBKO3ySh0YR pjM1AQCEEuX7qTakBtA1UB5UO/xH/MkQhza+GLknMAqngJA6dgD/UcKeuWeU4SaE oi8G4nxbe2/BUS1Muv0/Y0RU9suVIAE= =unik -----END PGP SIGNATURE----- Merge tag 'repair-symlink-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux into xfs-6.10-mergeA xfs: online repair of symbolic links The patches in this set adds the ability to repair the target buffer of a symbolic link, using the same salvage, rebuild, and swap strategy used everywhere else. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Chandan Babu R <chandanbabu@kernel.org> * tag 'repair-symlink-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux: xfs: online repair of symbolic links xfs: pass the owner to xfs_symlink_write_target xfs: expose xfs_bmap_local_to_extents for online repair |
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Chandan Babu R
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067d3f7100 |
xfs: move orphan files to lost and found [v30.3 10/16]
Orphaned files are defined to be files with nonzero ondisk link count but no observable parent directory. This series enables online repair to reparent orphaned files into the filesystem directory tree, and wires up this reparenting ability into the directory, file link count, and parent pointer repair functions. This is how we fix files with positive link count that are not reachable through the directory tree. This patch will also create the orphanage directory (lost+found) if it is not present. In contrast to xfs_repair, we follow e2fsck in creating the lost+found without group or other-owner access to avoid accidental disclosure of files that were previously hidden by an 0700 directory. That's silly security, but people have been known to do it. This has been running on the djcloud for months with no problems. Enjoy! Signed-off-by: Darrick J. Wong <djwong@kernel.org> -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQQ2qTKExjcn+O1o2YRKO3ySh0YRpgUCZh23UwAKCRBKO3ySh0YR pnJ8AP4kTiYucq40QUjYbG9xZGxbRenrgtwmBltcn6Xzm9PUVAD+KrU1GQ5Qm2zW /Kl5nDRM9zqJgQ5CQiBGuu3puHfnOgw= =vJ6T -----END PGP SIGNATURE----- Merge tag 'repair-orphanage-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux into xfs-6.10-mergeA xfs: move orphan files to lost and found Orphaned files are defined to be files with nonzero ondisk link count but no observable parent directory. This series enables online repair to reparent orphaned files into the filesystem directory tree, and wires up this reparenting ability into the directory, file link count, and parent pointer repair functions. This is how we fix files with positive link count that are not reachable through the directory tree. This patch will also create the orphanage directory (lost+found) if it is not present. In contrast to xfs_repair, we follow e2fsck in creating the lost+found without group or other-owner access to avoid accidental disclosure of files that were previously hidden by an 0700 directory. That's silly security, but people have been known to do it. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Chandan Babu R <chandanbabu@kernel.org> * tag 'repair-orphanage-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux: xfs: ensure dentry consistency when the orphanage adopts a file xfs: move files to orphanage instead of letting nlinks drop to zero xfs: move orphan files to the orphanage |
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Chandan Babu R
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9e6b93b727 |
xfs: online repair of directories [v30.3 09/16]
This series employs atomic extent swapping to enable safe reconstruction of directory data. For now, XFS does not support reverse directory links (aka parent pointers), so we can only salvage the dirents of a directory and construct a new structure. Directory repair therefore consists of five main parts: First, we walk the existing directory to salvage as many entries as we can, by adding them as new directory entries to the repair temp dir. Second, we validate the parent pointer found in the directory. If one was not found, we scan the entire filesystem looking for a potential parent. Third, we use atomic extent swaps to exchange the entire data fork between the two directories. Fourth, we reap the old directory blocks as carefully as we can. To wrap up the directory repair code, we need to add to the regular filesystem the ability to free all the data fork blocks in a directory. This does not change anything with normal directories, since they must still unlink and shrink one entry at a time. However, this will facilitate freeing of partially-inactivated temporary directories during log recovery. The second half of this patchset implements repairs for the dotdot entries of directories. For now there is only rudimentary support for this, because there are no directory parent pointers, so the best we can do is scanning the filesystem and the VFS dcache for answers. This has been running on the djcloud for months with no problems. Enjoy! Signed-off-by: Darrick J. Wong <djwong@kernel.org> -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQQ2qTKExjcn+O1o2YRKO3ySh0YRpgUCZh23UwAKCRBKO3ySh0YR piAGAP4hhYmBAiSGau5anRwUAFiELV2Irgz8k5oIGeWhg2m/kgEAn00d1rX8buLz ZQyYs1dSRtBpYs2EIZRTnnM2W4dYLQY= =2L3x -----END PGP SIGNATURE----- Merge tag 'repair-dirs-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux into xfs-6.10-mergeA xfs: online repair of directories This series employs atomic extent swapping to enable safe reconstruction of directory data. For now, XFS does not support reverse directory links (aka parent pointers), so we can only salvage the dirents of a directory and construct a new structure. Directory repair therefore consists of five main parts: First, we walk the existing directory to salvage as many entries as we can, by adding them as new directory entries to the repair temp dir. Second, we validate the parent pointer found in the directory. If one was not found, we scan the entire filesystem looking for a potential parent. Third, we use atomic extent swaps to exchange the entire data fork between the two directories. Fourth, we reap the old directory blocks as carefully as we can. To wrap up the directory repair code, we need to add to the regular filesystem the ability to free all the data fork blocks in a directory. This does not change anything with normal directories, since they must still unlink and shrink one entry at a time. However, this will facilitate freeing of partially-inactivated temporary directories during log recovery. The second half of this patchset implements repairs for the dotdot entries of directories. For now there is only rudimentary support for this, because there are no directory parent pointers, so the best we can do is scanning the filesystem and the VFS dcache for answers. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Chandan Babu R <chandanbabu@kernel.org> * tag 'repair-dirs-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux: xfs: ask the dentry cache if it knows the parent of a directory xfs: online repair of parent pointers xfs: scan the filesystem to repair a directory dotdot entry xfs: online repair of directories xfs: inactivate directory data blocks |
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Chandan Babu R
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902603bfa1 |
xfs: online repair of inode unlinked state [v30.3 08/16]
This series adds some logic to the inode scrubbers so that they can detect and deal with consistency errors between the link count and the per-inode unlinked list state. The helpers needed to do this are presented here because they are a prequisite for rebuildng directories, since we need to get a rebuilt non-empty directory off the unlinked list. Note that this patchset does not provide comprehensive reconstruction of the AGI unlinked list; that is coming in a subsequent patchset. This has been running on the djcloud for months with no problems. Enjoy! Signed-off-by: Darrick J. Wong <djwong@kernel.org> -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQQ2qTKExjcn+O1o2YRKO3ySh0YRpgUCZh23UwAKCRBKO3ySh0YR pt9pAQDbOMQ/9Y3Iyywkf9jTj9EvXEOpRlFPMd0F4gmtO9rhcAD/cQH9tctLcpeY DuAHqtmR3o2elpoXZrR1b+mAkS26Twc= =5oDH -----END PGP SIGNATURE----- Merge tag 'repair-unlinked-inode-state-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux into xfs-6.10-mergeA xfs: online repair of inode unlinked state This series adds some logic to the inode scrubbers so that they can detect and deal with consistency errors between the link count and the per-inode unlinked list state. The helpers needed to do this are presented here because they are a prequisite for rebuildng directories, since we need to get a rebuilt non-empty directory off the unlinked list. Note that this patchset does not provide comprehensive reconstruction of the AGI unlinked list; that is coming in a subsequent patchset. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Chandan Babu R <chandanbabu@kernel.org> * tag 'repair-unlinked-inode-state-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux: xfs: update the unlinked list when repairing link counts xfs: ensure unlinked list state is consistent with nlink during scrub |
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|
Chandan Babu R
|
5f3e951186 |
xfs: online repair of extended attributes [v30.3 07/16]
This series employs atomic extent swapping to enable safe reconstruction of extended attribute data attached to a file. Because xattrs do not have any redundant information to draw off of, we can at best salvage as much data as we can and build a new structure. Rebuilding an extended attribute structure consists of these three steps: First, we walk the existing attributes to salvage as many of them as we can, by adding them as new attributes attached to the repair tempfile. We need to add a new xfile-based data structure to hold blobs of arbitrary length to stage the xattr names and values. Second, we write the salvaged attributes to a temporary file, and use atomic extent swaps to exchange the entire attribute fork between the two files. Finally, we reap the old xattr blocks (which are now in the temporary file) as carefully as we can. This has been running on the djcloud for months with no problems. Enjoy! Signed-off-by: Darrick J. Wong <djwong@kernel.org> -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQQ2qTKExjcn+O1o2YRKO3ySh0YRpgUCZh23UwAKCRBKO3ySh0YR pgtVAQDEjDtM1TqUn8neJtXqtOPC2FZdLFq6Z1uSzxGWSRi9TwD/fcwgpvIrdF7g LFrCRk9UUJZRxrK6kGb+RcEtSJwwNwc= =FVWN -----END PGP SIGNATURE----- Merge tag 'repair-xattrs-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux into xfs-6.10-mergeA xfs: online repair of extended attributes This series employs atomic extent swapping to enable safe reconstruction of extended attribute data attached to a file. Because xattrs do not have any redundant information to draw off of, we can at best salvage as much data as we can and build a new structure. Rebuilding an extended attribute structure consists of these three steps: First, we walk the existing attributes to salvage as many of them as we can, by adding them as new attributes attached to the repair tempfile. We need to add a new xfile-based data structure to hold blobs of arbitrary length to stage the xattr names and values. Second, we write the salvaged attributes to a temporary file, and use atomic extent swaps to exchange the entire attribute fork between the two files. Finally, we reap the old xattr blocks (which are now in the temporary file) as carefully as we can. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Chandan Babu R <chandanbabu@kernel.org> * tag 'repair-xattrs-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux: xfs: create an xattr iteration function for scrub xfs: flag empty xattr leaf blocks for optimization xfs: scrub should set preen if attr leaf has holes xfs: repair extended attributes xfs: use atomic extent swapping to fix user file fork data xfs: create a blob array data structure xfs: enable discarding of folios backing an xfile |
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Chandan Babu R
|
fb1f7c662c |
xfs: set and validate dir/attr block owners [v30.3 06/16]
There are a couple of significant changes that need to be made to the directory and xattr code before we can support online repairs of those data structures. The first change is because online repair is designed to use libxfs to create a replacement dir/xattr structure in a temporary file, and use atomic extent swapping to commit the corrected structure. To avoid the performance hit of walking every block of the new structure to rewrite the owner number before the swap, we instead change libxfs to allow callers of the dir and xattr code the ability to set an explicit owner number to be written into the header fields of any new blocks that are created. For regular operation this will be the directory inode number. The second change is to update the dir/xattr code to actually *check* the owner number in each block that is read off the disk, since we don't currently do that. This has been running on the djcloud for months with no problems. Enjoy! Signed-off-by: Darrick J. Wong <djwong@kernel.org> -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQQ2qTKExjcn+O1o2YRKO3ySh0YRpgUCZh23UwAKCRBKO3ySh0YR po6LAQD4r4tzS1xMNW/ynLntzLNiYukkjI8uGpHw1tPpwmskKQD8Dw+bmGQPjUUR v62p5rUNcinvgxwdJwBcsOERGlVkIww= =6MPB -----END PGP SIGNATURE----- Merge tag 'dirattr-validate-owners-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux into xfs-6.10-mergeA xfs: set and validate dir/attr block owners There are a couple of significant changes that need to be made to the directory and xattr code before we can support online repairs of those data structures. The first change is because online repair is designed to use libxfs to create a replacement dir/xattr structure in a temporary file, and use atomic extent swapping to commit the corrected structure. To avoid the performance hit of walking every block of the new structure to rewrite the owner number before the swap, we instead change libxfs to allow callers of the dir and xattr code the ability to set an explicit owner number to be written into the header fields of any new blocks that are created. For regular operation this will be the directory inode number. The second change is to update the dir/xattr code to actually *check* the owner number in each block that is read off the disk, since we don't currently do that. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Chandan Babu R <chandanbabu@kernel.org> * tag 'dirattr-validate-owners-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux: xfs: validate explicit directory free block owners xfs: validate explicit directory block buffer owners xfs: validate explicit directory data buffer owners xfs: validate directory leaf buffer owners xfs: validate dabtree node buffer owners xfs: validate attr remote value buffer owners xfs: validate attr leaf buffer owners xfs: reduce indenting in xfs_attr_node_list xfs: use the xfs_da_args owner field to set new dir/attr block owner xfs: add an explicit owner field to xfs_da_args |
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Chandan Babu R
|
8b309acd10 |
xfs: online repair of realtime summaries [v30.3 05/16]
We now have all the infrastructure we need to repair file metadata. We'll begin with the realtime summary file, because it is the least complex data structure. To support this we need to add three more pieces to the temporary file code from the previous patchset -- preallocating space in the temp file, formatting metadata into that space and writing the blocks to disk, and swapping the fork mappings atomically. After that, the actual reconstruction of the realtime summary information is pretty simple, since we can simply write the incore copy computed by the rtsummary scrubber to the temporary file, swap the contents, and reap the old blocks. This has been running on the djcloud for months with no problems. Enjoy! Signed-off-by: Darrick J. Wong <djwong@kernel.org> -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQQ2qTKExjcn+O1o2YRKO3ySh0YRpgUCZh23UgAKCRBKO3ySh0YR pp/sAQCwODvb3ahgWbNMp6ejewJ1p8NjbmgRbTFckcwWROz4zQEAltyzqZBr6GuC 4E+7LGrh3Q03VX6pqNBGcGelNj20UgM= =c0Gb -----END PGP SIGNATURE----- Merge tag 'repair-rtsummary-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux into xfs-6.10-mergeA xfs: online repair of realtime summaries We now have all the infrastructure we need to repair file metadata. We'll begin with the realtime summary file, because it is the least complex data structure. To support this we need to add three more pieces to the temporary file code from the previous patchset -- preallocating space in the temp file, formatting metadata into that space and writing the blocks to disk, and swapping the fork mappings atomically. After that, the actual reconstruction of the realtime summary information is pretty simple, since we can simply write the incore copy computed by the rtsummary scrubber to the temporary file, swap the contents, and reap the old blocks. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Chandan Babu R <chandanbabu@kernel.org> * tag 'repair-rtsummary-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux: xfs: online repair of realtime summaries xfs: teach the tempfile to set up atomic file content exchanges xfs: support preallocating and copying content into temporary files |
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Chandan Babu R
|
783c51708b |
xfs: create temporary files for online repair [v30.3 04/16]
As mentioned earlier, the repair strategy for file-based metadata is to build a new copy in a temporary file and swap the file fork mappings with the metadata inode. We've built the atomic extent swap facility, so now we need to build a facility for handling private temporary files. The first step is to teach the filesystem to ignore the temporary files. We'll mark them as PRIVATE in the VFS so that the kernel security modules will leave it alone. The second step is to add the online repair code the ability to create a temporary file and reap extents from the temporary file after the extent swap. This has been running on the djcloud for months with no problems. Enjoy! Signed-off-by: Darrick J. Wong <djwong@kernel.org> -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQQ2qTKExjcn+O1o2YRKO3ySh0YRpgUCZh23UgAKCRBKO3ySh0YR pukxAQCWf6T3FpJHXPHAwc8ANNWAZHufPTn8LH1m2DTKal6rGgEAo0rnqmV5xN/p WDMMAm5ngW2mDlBJFX8ClE2+1DHsqAc= =SKWV -----END PGP SIGNATURE----- Merge tag 'repair-tempfiles-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux into xfs-6.10-mergeA xfs: create temporary files for online repair As mentioned earlier, the repair strategy for file-based metadata is to build a new copy in a temporary file and swap the file fork mappings with the metadata inode. We've built the atomic extent swap facility, so now we need to build a facility for handling private temporary files. The first step is to teach the filesystem to ignore the temporary files. We'll mark them as PRIVATE in the VFS so that the kernel security modules will leave it alone. The second step is to add the online repair code the ability to create a temporary file and reap extents from the temporary file after the extent swap. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Chandan Babu R <chandanbabu@kernel.org> * tag 'repair-tempfiles-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux: xfs: add the ability to reap entire inode forks xfs: refactor live buffer invalidation for repairs xfs: create temporary files and directories for online repair xfs: hide private inodes from bulkstat and handle functions |
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Chandan Babu R
|
22d5a8e52d |
xfs: atomic file content exchanges [v30.3 03/16]
This series creates a new XFS_IOC_EXCHANGE_RANGE ioctl to exchange
ranges of bytes between two files atomically.
This new functionality enables data storage programs to stage and commit
file updates such that reader programs will see either the old contents
or the new contents in their entirety, with no chance of torn writes. A
successful call completion guarantees that the new contents will be seen
even if the system fails.
The ability to exchange file fork mappings between files in this manner
is critical to supporting online filesystem repair, which is built upon
the strategy of constructing a clean copy of a damaged structure and
committing the new structure into the metadata file atomically. The
ioctls exist to facilitate testing of the new functionality and to
enable future application program designs.
User programs will be able to update files atomically by opening an
O_TMPFILE, reflinking the source file to it, making whatever updates
they want to make, and exchange the relevant ranges of the temp file
with the original file. If the updates are aligned with the file block
size, a new (since v2) flag provides for exchanging only the written
areas. Note that application software must quiesce writes to the file
while it stages an atomic update. This will be addressed by a
subsequent series.
This mechanism solves the clunkiness of two existing atomic file update
mechanisms: for O_TRUNC + rewrite, this eliminates the brief period
where other programs can see an empty file. For create tempfile +
rename, the need to copy file attributes and extended attributes for
each file update is eliminated.
However, this method introduces its own awkwardness -- any program
initiating an exchange now needs to have a way to signal to other
programs that the file contents have changed. For file access mediated
via read and write, fanotify or inotify are probably sufficient. For
mmaped files, that may not be fast enough.
Here is the proposed manual page:
IOCTL-XFS-EXCHANGE-RANGE(2System Calls ManuIOCTL-XFS-EXCHANGE-RANGE(2)
NAME
ioctl_xfs_exchange_range - exchange the contents of parts of
two files
SYNOPSIS
#include <sys/ioctl.h>
#include <xfs/xfs_fs.h>
int ioctl(int file2_fd, XFS_IOC_EXCHANGE_RANGE, struct xfs_ex‐
change_range *arg);
DESCRIPTION
Given a range of bytes in a first file file1_fd and a second
range of bytes in a second file file2_fd, this ioctl(2) ex‐
changes the contents of the two ranges.
Exchanges are atomic with regards to concurrent file opera‐
tions. Implementations must guarantee that readers see either
the old contents or the new contents in their entirety, even if
the system fails.
The system call parameters are conveyed in structures of the
following form:
struct xfs_exchange_range {
__s32 file1_fd;
__u32 pad;
__u64 file1_offset;
__u64 file2_offset;
__u64 length;
__u64 flags;
};
The field pad must be zero.
The fields file1_fd, file1_offset, and length define the first
range of bytes to be exchanged.
The fields file2_fd, file2_offset, and length define the second
range of bytes to be exchanged.
Both files must be from the same filesystem mount. If the two
file descriptors represent the same file, the byte ranges must
not overlap. Most disk-based filesystems require that the
starts of both ranges must be aligned to the file block size.
If this is the case, the ends of the ranges must also be so
aligned unless the XFS_EXCHANGE_RANGE_TO_EOF flag is set.
The field flags control the behavior of the exchange operation.
XFS_EXCHANGE_RANGE_TO_EOF
Ignore the length parameter. All bytes in file1_fd
from file1_offset to EOF are moved to file2_fd, and
file2's size is set to (file2_offset+(file1_length-
file1_offset)). Meanwhile, all bytes in file2 from
file2_offset to EOF are moved to file1 and file1's
size is set to (file1_offset+(file2_length-
file2_offset)).
XFS_EXCHANGE_RANGE_DSYNC
Ensure that all modified in-core data in both file
ranges and all metadata updates pertaining to the
exchange operation are flushed to persistent storage
before the call returns. Opening either file de‐
scriptor with O_SYNC or O_DSYNC will have the same
effect.
XFS_EXCHANGE_RANGE_FILE1_WRITTEN
Only exchange sub-ranges of file1_fd that are known
to contain data written by application software.
Each sub-range may be expanded (both upwards and
downwards) to align with the file allocation unit.
For files on the data device, this is one filesystem
block. For files on the realtime device, this is
the realtime extent size. This facility can be used
to implement fast atomic scatter-gather writes of
any complexity for software-defined storage targets
if all writes are aligned to the file allocation
unit.
XFS_EXCHANGE_RANGE_DRY_RUN
Check the parameters and the feasibility of the op‐
eration, but do not change anything.
RETURN VALUE
On error, -1 is returned, and errno is set to indicate the er‐
ror.
ERRORS
Error codes can be one of, but are not limited to, the follow‐
ing:
EBADF file1_fd is not open for reading and writing or is open
for append-only writes; or file2_fd is not open for
reading and writing or is open for append-only writes.
EINVAL The parameters are not correct for these files. This
error can also appear if either file descriptor repre‐
sents a device, FIFO, or socket. Disk filesystems gen‐
erally require the offset and length arguments to be
aligned to the fundamental block sizes of both files.
EIO An I/O error occurred.
EISDIR One of the files is a directory.
ENOMEM The kernel was unable to allocate sufficient memory to
perform the operation.
ENOSPC There is not enough free space in the filesystem ex‐
change the contents safely.
EOPNOTSUPP
The filesystem does not support exchanging bytes between
the two files.
EPERM file1_fd or file2_fd are immutable.
ETXTBSY
One of the files is a swap file.
EUCLEAN
The filesystem is corrupt.
EXDEV file1_fd and file2_fd are not on the same mounted
filesystem.
CONFORMING TO
This API is XFS-specific.
USE CASES
Several use cases are imagined for this system call. In all
cases, application software must coordinate updates to the file
because the exchange is performed unconditionally.
The first is a data storage program that wants to commit non-
contiguous updates to a file atomically and coordinates write
access to that file. This can be done by creating a temporary
file, calling FICLONE(2) to share the contents, and staging the
updates into the temporary file. The FULL_FILES flag is recom‐
mended for this purpose. The temporary file can be deleted or
punched out afterwards.
An example program might look like this:
int fd = open("/some/file", O_RDWR);
int temp_fd = open("/some", O_TMPFILE | O_RDWR);
ioctl(temp_fd, FICLONE, fd);
/* append 1MB of records */
lseek(temp_fd, 0, SEEK_END);
write(temp_fd, data1, 1000000);
/* update record index */
pwrite(temp_fd, data1, 600, 98765);
pwrite(temp_fd, data2, 320, 54321);
pwrite(temp_fd, data2, 15, 0);
/* commit the entire update */
struct xfs_exchange_range args = {
.file1_fd = temp_fd,
.flags = XFS_EXCHANGE_RANGE_TO_EOF,
};
ioctl(fd, XFS_IOC_EXCHANGE_RANGE, &args);
The second is a software-defined storage host (e.g. a disk
jukebox) which implements an atomic scatter-gather write com‐
mand. Provided the exported disk's logical block size matches
the file's allocation unit size, this can be done by creating a
temporary file and writing the data at the appropriate offsets.
It is recommended that the temporary file be truncated to the
size of the regular file before any writes are staged to the
temporary file to avoid issues with zeroing during EOF exten‐
sion. Use this call with the FILE1_WRITTEN flag to exchange
only the file allocation units involved in the emulated de‐
vice's write command. The temporary file should be truncated
or punched out completely before being reused to stage another
write.
An example program might look like this:
int fd = open("/some/file", O_RDWR);
int temp_fd = open("/some", O_TMPFILE | O_RDWR);
struct stat sb;
int blksz;
fstat(fd, &sb);
blksz = sb.st_blksize;
/* land scatter gather writes between 100fsb and 500fsb */
pwrite(temp_fd, data1, blksz * 2, blksz * 100);
pwrite(temp_fd, data2, blksz * 20, blksz * 480);
pwrite(temp_fd, data3, blksz * 7, blksz * 257);
/* commit the entire update */
struct xfs_exchange_range args = {
.file1_fd = temp_fd,
.file1_offset = blksz * 100,
.file2_offset = blksz * 100,
.length = blksz * 400,
.flags = XFS_EXCHANGE_RANGE_FILE1_WRITTEN |
XFS_EXCHANGE_RANGE_FILE1_DSYNC,
};
ioctl(fd, XFS_IOC_EXCHANGE_RANGE, &args);
NOTES
Some filesystems may limit the amount of data or the number of
extents that can be exchanged in a single call.
SEE ALSO
ioctl(2)
XFS 2024-02-10 IOCTL-XFS-EXCHANGE-RANGE(2)
The reference implementation in XFS creates a new log incompat feature
and log intent items to track high level progress of swapping ranges of
two files and finish interrupted work if the system goes down. Sample
code can be found in the corresponding changes to xfs_io to exercise the
use case mentioned above.
Note that this function is /not/ the O_DIRECT atomic untorn file writes
concept that has also been floating around for years. It is also not
the RWF_ATOMIC patchset that has been shared. This RFC is constructed
entirely in software, which means that there are no limitations other
than the general filesystem limits.
As a side note, the original motivation behind the kernel functionality
is online repair of file-based metadata. The atomic file content
exchange is implemented as an atomic exchange of file fork mappings,
which means that we can implement online reconstruction of extended
attributes and directories by building a new one in another inode and
exchanging the contents.
Subsequent patchsets adapt the online filesystem repair code to use
atomic file exchanges. This enables repair functions to construct a
clean copy of a directory, xattr information, symbolic links, realtime
bitmaps, and realtime summary information in a temporary inode. If this
completes successfully, the new contents can be committed atomically
into the inode being repaired. This is essential to avoid making
corruption problems worse if the system goes down in the middle of
running repair.
For userspace, this series also includes the userspace pieces needed to
test the new functionality, and a sample implementation of atomic file
updates.
This has been running on the djcloud for months with no problems. Enjoy!
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Merge tag 'atomic-file-updates-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux into xfs-6.10-mergeA
xfs: atomic file content exchanges
This series creates a new XFS_IOC_EXCHANGE_RANGE ioctl to exchange
ranges of bytes between two files atomically.
This new functionality enables data storage programs to stage and commit
file updates such that reader programs will see either the old contents
or the new contents in their entirety, with no chance of torn writes. A
successful call completion guarantees that the new contents will be seen
even if the system fails.
The ability to exchange file fork mappings between files in this manner
is critical to supporting online filesystem repair, which is built upon
the strategy of constructing a clean copy of a damaged structure and
committing the new structure into the metadata file atomically. The
ioctls exist to facilitate testing of the new functionality and to
enable future application program designs.
User programs will be able to update files atomically by opening an
O_TMPFILE, reflinking the source file to it, making whatever updates
they want to make, and exchange the relevant ranges of the temp file
with the original file. If the updates are aligned with the file block
size, a new (since v2) flag provides for exchanging only the written
areas. Note that application software must quiesce writes to the file
while it stages an atomic update. This will be addressed by a
subsequent series.
This mechanism solves the clunkiness of two existing atomic file update
mechanisms: for O_TRUNC + rewrite, this eliminates the brief period
where other programs can see an empty file. For create tempfile +
rename, the need to copy file attributes and extended attributes for
each file update is eliminated.
However, this method introduces its own awkwardness -- any program
initiating an exchange now needs to have a way to signal to other
programs that the file contents have changed. For file access mediated
via read and write, fanotify or inotify are probably sufficient. For
mmaped files, that may not be fast enough.
Here is the proposed manual page:
IOCTL-XFS-EXCHANGE-RANGE(2System Calls ManuIOCTL-XFS-EXCHANGE-RANGE(2)
NAME
ioctl_xfs_exchange_range - exchange the contents of parts of
two files
SYNOPSIS
#include <sys/ioctl.h>
#include <xfs/xfs_fs.h>
int ioctl(int file2_fd, XFS_IOC_EXCHANGE_RANGE, struct xfs_ex‐
change_range *arg);
DESCRIPTION
Given a range of bytes in a first file file1_fd and a second
range of bytes in a second file file2_fd, this ioctl(2) ex‐
changes the contents of the two ranges.
Exchanges are atomic with regards to concurrent file opera‐
tions. Implementations must guarantee that readers see either
the old contents or the new contents in their entirety, even if
the system fails.
The system call parameters are conveyed in structures of the
following form:
struct xfs_exchange_range {
__s32 file1_fd;
__u32 pad;
__u64 file1_offset;
__u64 file2_offset;
__u64 length;
__u64 flags;
};
The field pad must be zero.
The fields file1_fd, file1_offset, and length define the first
range of bytes to be exchanged.
The fields file2_fd, file2_offset, and length define the second
range of bytes to be exchanged.
Both files must be from the same filesystem mount. If the two
file descriptors represent the same file, the byte ranges must
not overlap. Most disk-based filesystems require that the
starts of both ranges must be aligned to the file block size.
If this is the case, the ends of the ranges must also be so
aligned unless the XFS_EXCHANGE_RANGE_TO_EOF flag is set.
The field flags control the behavior of the exchange operation.
XFS_EXCHANGE_RANGE_TO_EOF
Ignore the length parameter. All bytes in file1_fd
from file1_offset to EOF are moved to file2_fd, and
file2's size is set to (file2_offset+(file1_length-
file1_offset)). Meanwhile, all bytes in file2 from
file2_offset to EOF are moved to file1 and file1's
size is set to (file1_offset+(file2_length-
file2_offset)).
XFS_EXCHANGE_RANGE_DSYNC
Ensure that all modified in-core data in both file
ranges and all metadata updates pertaining to the
exchange operation are flushed to persistent storage
before the call returns. Opening either file de‐
scriptor with O_SYNC or O_DSYNC will have the same
effect.
XFS_EXCHANGE_RANGE_FILE1_WRITTEN
Only exchange sub-ranges of file1_fd that are known
to contain data written by application software.
Each sub-range may be expanded (both upwards and
downwards) to align with the file allocation unit.
For files on the data device, this is one filesystem
block. For files on the realtime device, this is
the realtime extent size. This facility can be used
to implement fast atomic scatter-gather writes of
any complexity for software-defined storage targets
if all writes are aligned to the file allocation
unit.
XFS_EXCHANGE_RANGE_DRY_RUN
Check the parameters and the feasibility of the op‐
eration, but do not change anything.
RETURN VALUE
On error, -1 is returned, and errno is set to indicate the er‐
ror.
ERRORS
Error codes can be one of, but are not limited to, the follow‐
ing:
EBADF file1_fd is not open for reading and writing or is open
for append-only writes; or file2_fd is not open for
reading and writing or is open for append-only writes.
EINVAL The parameters are not correct for these files. This
error can also appear if either file descriptor repre‐
sents a device, FIFO, or socket. Disk filesystems gen‐
erally require the offset and length arguments to be
aligned to the fundamental block sizes of both files.
EIO An I/O error occurred.
EISDIR One of the files is a directory.
ENOMEM The kernel was unable to allocate sufficient memory to
perform the operation.
ENOSPC There is not enough free space in the filesystem ex‐
change the contents safely.
EOPNOTSUPP
The filesystem does not support exchanging bytes between
the two files.
EPERM file1_fd or file2_fd are immutable.
ETXTBSY
One of the files is a swap file.
EUCLEAN
The filesystem is corrupt.
EXDEV file1_fd and file2_fd are not on the same mounted
filesystem.
CONFORMING TO
This API is XFS-specific.
USE CASES
Several use cases are imagined for this system call. In all
cases, application software must coordinate updates to the file
because the exchange is performed unconditionally.
The first is a data storage program that wants to commit non-
contiguous updates to a file atomically and coordinates write
access to that file. This can be done by creating a temporary
file, calling FICLONE(2) to share the contents, and staging the
updates into the temporary file. The FULL_FILES flag is recom‐
mended for this purpose. The temporary file can be deleted or
punched out afterwards.
An example program might look like this:
int fd = open("/some/file", O_RDWR);
int temp_fd = open("/some", O_TMPFILE | O_RDWR);
ioctl(temp_fd, FICLONE, fd);
/* append 1MB of records */
lseek(temp_fd, 0, SEEK_END);
write(temp_fd, data1, 1000000);
/* update record index */
pwrite(temp_fd, data1, 600, 98765);
pwrite(temp_fd, data2, 320, 54321);
pwrite(temp_fd, data2, 15, 0);
/* commit the entire update */
struct xfs_exchange_range args = {
.file1_fd = temp_fd,
.flags = XFS_EXCHANGE_RANGE_TO_EOF,
};
ioctl(fd, XFS_IOC_EXCHANGE_RANGE, &args);
The second is a software-defined storage host (e.g. a disk
jukebox) which implements an atomic scatter-gather write com‐
mand. Provided the exported disk's logical block size matches
the file's allocation unit size, this can be done by creating a
temporary file and writing the data at the appropriate offsets.
It is recommended that the temporary file be truncated to the
size of the regular file before any writes are staged to the
temporary file to avoid issues with zeroing during EOF exten‐
sion. Use this call with the FILE1_WRITTEN flag to exchange
only the file allocation units involved in the emulated de‐
vice's write command. The temporary file should be truncated
or punched out completely before being reused to stage another
write.
An example program might look like this:
int fd = open("/some/file", O_RDWR);
int temp_fd = open("/some", O_TMPFILE | O_RDWR);
struct stat sb;
int blksz;
fstat(fd, &sb);
blksz = sb.st_blksize;
/* land scatter gather writes between 100fsb and 500fsb */
pwrite(temp_fd, data1, blksz * 2, blksz * 100);
pwrite(temp_fd, data2, blksz * 20, blksz * 480);
pwrite(temp_fd, data3, blksz * 7, blksz * 257);
/* commit the entire update */
struct xfs_exchange_range args = {
.file1_fd = temp_fd,
.file1_offset = blksz * 100,
.file2_offset = blksz * 100,
.length = blksz * 400,
.flags = XFS_EXCHANGE_RANGE_FILE1_WRITTEN |
XFS_EXCHANGE_RANGE_FILE1_DSYNC,
};
ioctl(fd, XFS_IOC_EXCHANGE_RANGE, &args);
NOTES
Some filesystems may limit the amount of data or the number of
extents that can be exchanged in a single call.
SEE ALSO
ioctl(2)
XFS 2024-02-10 IOCTL-XFS-EXCHANGE-RANGE(2)
The reference implementation in XFS creates a new log incompat feature
and log intent items to track high level progress of swapping ranges of
two files and finish interrupted work if the system goes down. Sample
code can be found in the corresponding changes to xfs_io to exercise the
use case mentioned above.
Note that this function is /not/ the O_DIRECT atomic untorn file writes
concept that has also been floating around for years. It is also not
the RWF_ATOMIC patchset that has been shared. This RFC is constructed
entirely in software, which means that there are no limitations other
than the general filesystem limits.
As a side note, the original motivation behind the kernel functionality
is online repair of file-based metadata. The atomic file content
exchange is implemented as an atomic exchange of file fork mappings,
which means that we can implement online reconstruction of extended
attributes and directories by building a new one in another inode and
exchanging the contents.
Subsequent patchsets adapt the online filesystem repair code to use
atomic file exchanges. This enables repair functions to construct a
clean copy of a directory, xattr information, symbolic links, realtime
bitmaps, and realtime summary information in a temporary inode. If this
completes successfully, the new contents can be committed atomically
into the inode being repaired. This is essential to avoid making
corruption problems worse if the system goes down in the middle of
running repair.
For userspace, this series also includes the userspace pieces needed to
test the new functionality, and a sample implementation of atomic file
updates.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
* tag 'atomic-file-updates-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux:
xfs: enable logged file mapping exchange feature
docs: update swapext -> exchmaps language
xfs: capture inode generation numbers in the ondisk exchmaps log item
xfs: support non-power-of-two rtextsize with exchange-range
xfs: make file range exchange support realtime files
xfs: condense symbolic links after a mapping exchange operation
xfs: condense directories after a mapping exchange operation
xfs: condense extended attributes after a mapping exchange operation
xfs: add error injection to test file mapping exchange recovery
xfs: bind together the front and back ends of the file range exchange code
xfs: create deferred log items for file mapping exchanges
xfs: introduce a file mapping exchange log intent item
xfs: create a incompat flag for atomic file mapping exchanges
xfs: introduce new file range exchange ioctl
vfs: export remap and write check helpers
|
||
|
Chandan Babu R
|
4ec2e3c167 |
xfs: refactorings for atomic file content exchanges [v30.3 02/16]
This series applies various cleanups and refactorings to file IO handling code ahead of the main series to implement atomic file content exchanges. This has been running on the djcloud for months with no problems. Enjoy! Signed-off-by: Darrick J. Wong <djwong@kernel.org> -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQQ2qTKExjcn+O1o2YRKO3ySh0YRpgUCZh23UgAKCRBKO3ySh0YR pginAQCcZq5bFYJGYj4UInUOfDDjuq8R9Rl8DGDhnTFb8FxAUAD+Jsol2/wQduII Bly/+Hegen2BoayNuf3iZG7RYkJWygo= =tHoT -----END PGP SIGNATURE----- Merge tag 'file-exchange-refactorings-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux into xfs-6.10-mergeA xfs: refactorings for atomic file content exchanges This series applies various cleanups and refactorings to file IO handling code ahead of the main series to implement atomic file content exchanges. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Chandan Babu R <chandanbabu@kernel.org> * tag 'file-exchange-refactorings-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux: xfs: constify xfs_bmap_is_written_extent xfs: refactor non-power-of-two alignment checks xfs: hoist multi-fsb allocation unit detection to a helper xfs: create a new helper to return a file's allocation unit xfs: declare xfs_file.c symbols in xfs_file.h xfs: move xfs_iops.c declarations out of xfs_inode.h xfs: move inode lease breaking functions to xfs_inode.c |
||
|
Chandan Babu R
|
ebe0f798e1 |
xfs: improve log incompat feature handling [v30.3 01/16]
This patchset improves the performance of log incompat feature bit handling by making a few changes to how the filesystem handles them. First, we now only clear the bits during a clean unmount to reduce calls to the (expensive) upgrade function to once per bit per mount. Second, we now only allow incompat feature upgrades for sysadmins or if the sysadmin explicitly allows it via mount option. Currently the only log incompat user is logged xattrs, which requires CONFIG_XFS_DEBUG=y, so there should be no user visible impact to this change. This has been running on the djcloud for months with no problems. Enjoy! Signed-off-by: Darrick J. Wong <djwong@kernel.org> -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQQ2qTKExjcn+O1o2YRKO3ySh0YRpgUCZh23UgAKCRBKO3ySh0YR pharAQDYPe2dmXxQ28fUC1GMy38DLCt0f/XXLkhUI0yeC+mbcQD/aLWU5MCy5TGN OF3HQwrgL9+SZWwhqRbu8hPG7ZLBWQQ= =yieh -----END PGP SIGNATURE----- Merge tag 'log-incompat-permissions-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux into xfs-6.10-mergeA xfs: improve log incompat feature handling This patchset improves the performance of log incompat feature bit handling by making a few changes to how the filesystem handles them. First, we now only clear the bits during a clean unmount to reduce calls to the (expensive) upgrade function to once per bit per mount. Second, we now only allow incompat feature upgrades for sysadmins or if the sysadmin explicitly allows it via mount option. Currently the only log incompat user is logged xattrs, which requires CONFIG_XFS_DEBUG=y, so there should be no user visible impact to this change. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Chandan Babu R <chandanbabu@kernel.org> * tag 'log-incompat-permissions-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux: xfs: only clear log incompat flags at clean unmount xfs: fix error bailout in xrep_abt_build_new_trees xfs: fix potential AGI <-> ILOCK ABBA deadlock in xrep_dinode_findmode_walk_directory xfs: fix an AGI lock acquisition ordering problem in xrep_dinode_findmode xfs: pass xfs_buf lookup flags to xfs_*read_agi |
||
Konrad Dybcio
|
39c596304e |
arm64: dts: qcom: Add SM8550 Xperia 1 V
Add support for Sony Xperia 1 V, a.k.a PDX234. This device is a part
of the SoMC SM8550 Yodo platform.
This commit brings support for:
* Remoteprocs (sans modem for now)
* Flash LED (the notification LED is gone :((((()
* SD Card
* USB (*including SuperSpeed*) + PMIC_GLINK (it's funky, requires a replug
with an cable flip sometimes..)
* Most regulators
* Part of I2C-connected peripherals (notably no touch due to a
driver bug)
* PCIe0 (PCIe1 is unused)
Do note display via simplefb is not supported, as the display is blanked
upon exiting XBL.
To create a working boot image, you need to run:
cat arch/arm64/boot/Image.gz arch/arm64/boot/dts/qcom/sm8550-sony-xperia-\
yodo-pdx234.dtb > .Image.gz-dtb
mkbootimg \
--kernel .Image.gz-dtb \
--ramdisk some_initrd.img \
--pagesize 4096 \
--base 0x0 \
--kernel_offset 0x8000 \
--ramdisk_offset 0x1000000 \
--tags_offset 0x100 \
--cmdline "SOME_CMDLINE" \
--dtb_offset 0x1f00000 \
--header_version 2 \
-o boot.img-sony-xperia-pdx234
Then, you need to flash it on the device and get rid of all the
vendor_boot/dtbo mess:
// You have to either pull vbmeta{"","_system"} from
// /dev/block/bootdevice/by-name/ or build one as a part of AOSP build process
fastboot --disable-verity --disable-verification flash vbmeta vbmeta.img
fastboot --disable-verity --disable-verification flash vbmeta_system \
vbmeta_system.img
fastboot flash boot boot.img-sony-xperia-pdx234
fastboot erase vendor_boot
fastboot erase recovery
fastboot flash dtbo emptydtbo.img
fastboot erase init_boot // ? I don't remember if it's necessary, sorry
fastboot continue
Where emptydtbo.img is a tiny file that consists of 2 bytes (all zeroes), doing
a "fastboot erase" won't cut it, the bootloader will go crazy and things will
fall apart when it tries to overlay random bytes from an empty partition onto a
perfectly good appended DTB.
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20240210-topic-1v-v1-7-fda0db38e29b@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
|
||
|
Konrad Dybcio
|
6e4f7e5399 |
arm64: dts: qcom: sm8550: Mark DWC3 as dma-coherent
In a fairly new development, Qualcomm somehow made the DWC3 block
cache-coherent. Annotate that.
Fixes:
|
||
|
Konrad Dybcio
|
d18b5477dc |
arm64: dts: qcom: sm8550: Add missing DWC3 quirks
As expected, Qualcomm DWC3 implementation come with a sizable number
of quirks. Make sure to account for all of them.
Fixes:
|
||
|
Konrad Dybcio
|
93395f9a8d |
arm64: dts: qcom: sm8550: Mark APPS SMMU as dma-coherent
Like on earlier flagship Qualcomm SoCs, the SMMU is dma-coherent.
Mark it as such.
Fixes:
|
||
|
Konrad Dybcio
|
91fc74458d |
arm64: dts: qcom: sm8550: Mark QUPs and GPI dma-coherent
These peripherals are DMA-coherent on 8550. Mark them as such.
Interestingly enough, the I2C master hubs are not.
Fixes:
|
||
|
Konrad Dybcio
|
212729551c |
dt-bindings: arm: qcom: Add Xperia 1 V
Document the SM8550 SONY Xperia 1 V (PDX234) board. Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org> Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20240210-topic-1v-v1-2-fda0db38e29b@linaro.org Signed-off-by: Bjorn Andersson <andersson@kernel.org> |
||
Kees Cook
|
f4626c12e4 |
ubsan: Add awareness of signed integer overflow traps
On arm64, UBSAN traps can be decoded from the trap instruction. Add the
add, sub, and mul overflow trap codes now that CONFIG_UBSAN_SIGNED_WRAP
exists. Seen under clang 19:
Internal error: UBSAN: unrecognized failure code: 00000000f2005515 [#1] PREEMPT SMP
Reported-by: Nathan Chancellor <nathan@kernel.org>
Closes: https://lore.kernel.org/lkml/20240411-fix-ubsan-in-hardening-config-v1-0-e0177c80ffaa@kernel.org
Fixes:
|
||
Andy Shevchenko
|
bb40996267 |
spi: Consistently use BIT for cs_index_mask (part 2)
For some reason the commit
|
||
|
Andy Shevchenko
|
d707530b1e |
spi: Introduce spi_for_each_valid_cs() in order of deduplication
In order of deduplication and better maintenance introduce a new spi_for_each_valid_cs() helper macro. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20240415193340.1279360-3-andriy.shevchenko@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org> |
||
|
Andy Shevchenko
|
e81582c080 |
spi: Extract spi_toggle_csgpiod() helper for better maintanance
The multi-CS support splits the comment and the code in the spi_set_cs(). To avoid this in the future extract spi_toggle_csgpiod() helper. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20240415193340.1279360-2-andriy.shevchenko@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org> |
||
Shengjiu Wang
|
62c48dd33b |
ASoC: dt-bindings: fsl-asoc-card: Add compatbile string for wm8904 codec
The wm8904 codec is used on an i.MX95 Toradex board. Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com> Link: https://lore.kernel.org/r/1713165456-3494-3-git-send-email-shengjiu.wang@nxp.com Signed-off-by: Mark Brown <broonie@kernel.org> |
||
|
Shengjiu Wang
|
51f67862ea |
ASoC: fsl-asoc-card: add wm8904 codec support
wm8904 codec is used on i.MX95 Toradex board Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com> Link: https://lore.kernel.org/r/1713165456-3494-2-git-send-email-shengjiu.wang@nxp.com Signed-off-by: Mark Brown <broonie@kernel.org> |
||
Jack Yu
|
cebfbc89ae |
ASoC: rt715: add vendor clear control register
Add vendor clear control register in readable register's callback function. This prevents an access failure reported in Intel CI tests. Signed-off-by: Jack Yu <jack.yu@realtek.com> Closes: https://github.com/thesofproject/linux/issues/4860 Tested-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Link: https://lore.kernel.org/r/6a103ce9134d49d8b3941172c87a7bd4@realtek.com Signed-off-by: Mark Brown <broonie@kernel.org> |
||
Fenglin Wu
|
48c0687a32 |
Input: pm8xxx-vibrator - correct VIB_MAX_LEVELS calculation
The output voltage is inclusive hence the max level calculation is
off-by-one-step. Correct it.
iWhile we are at it also add a define for the step size instead of
using the magic value.
Fixes:
|
||
Ricardo Ribalda
|
ba2ec9c4f0 |
Input: sur40 - convert le16 to cpu before use
Smatch found this issue: drivers/input/touchscreen/sur40.c:424:55: warning: incorrect type in argument 2 (different base types) drivers/input/touchscreen/sur40.c:424:55: expected int key drivers/input/touchscreen/sur40.c:424:55: got restricted __le16 [usertype] blob_id Signed-off-by: Ricardo Ribalda <ribalda@chromium.org> Link: https://lore.kernel.org/r/20240410-smatch-v1-6-785d009a852b@chromium.org Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> |
||
Ricardo B. Marliere
|
e6faf2b750 |
peci: constify the struct device_type usage
Since commit
|
||
|
Ricardo B. Marliere
|
ed8c2dad25 |
peci: Make peci_bus_type const
Now that the driver core can properly handle constant struct bus_type, move the peci_bus_type variable to be a constant structure as well, placing it into read-only memory which can not be modified at runtime. Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: "Ricardo B. Marliere" <ricardo@marliere.net> Link: https://lore.kernel.org/r/20240210-bus_cleanup-peci-v1-1-1e64bef6efc0@marliere.net Signed-off-by: Iwona Winiarska <iwona.winiarska@intel.com> |
||
|
Ricardo Ribalda
|
836e254852 |
media: usb: siano: Fix allocation of urbs
USB urbs must be allocated with usb_alloc_urb. Quoting the manual Only use this function (usb_init_urb) if you _really_ understand what you are doing. Fix the following smatch error: drivers/media/usb/siano/smsusb.c:53:38: warning: array of flexible structures Signed-off-by: Ricardo Ribalda <ribalda@chromium.org> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> |
||
Stefan Herdler
|
c3224f4147 |
media: ttpci: coding style fixes: logging
This patch fixes the following checkpatch warnings: WARNING:PRINTK_WITHOUT_KERN_LEVEL: printk() should include KERN_<LEVEL> facility level WARNING:PREFER_PR_LEVEL: Prefer [subsystem eg: netdev]_dbg([subsystem]dev, ... then dev_dbg(dev, ... then pr_debug(... to printk(KERN_DEBUG ... WARNING:EMBEDDED_FUNCTION_NAME: Prefer using '"%s...", __func__' to using 'ciintf_slot_ts_enable', this function's name, in a string CHECK:MACRO_ARG_PRECEDENCE: Macro argument 'level' may be better as '(level)' to avoid precedence issues There was no consistent style of logging functions used so far. Convert all logging to the appropriate pr_* macros. Add a global pr_fmt macro for the whole driver. Signed-off-by: Stefan Herdler <herdler@nurfuerspam.de> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> |
||
|
Stefan Herdler
|
58557349a8 |
media: ttpci: coding style fixes: miscellaneous
This patch fixes the following checkpatch warnings: WARNING:RETURN_VOID: void function return statements are not generally useful WARNING:TRAILING_SEMICOLON: macros should not use a trailing semicolon Signed-off-by: Stefan Herdler <herdler@nurfuerspam.de> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> |
||
|
Stefan Herdler
|
22a8f8c216 |
media: ttpci: coding style fixes: constant_comparsation
This patch fixes the following checkpatch warnings: WARNING:CONSTANT_COMPARISON: Comparisons should place the constant on the right side of the test Signed-off-by: Stefan Herdler <herdler@nurfuerspam.de> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> |
||
|
Stefan Herdler
|
2b8db3ebaf |
media: ttpci: coding style fixes: trailing_statements
This patch fixes the following checkpatch errors: ERROR:TRAILING_STATEMENTS: trailing statements should be on next line Signed-off-by: Stefan Herdler <herdler@nurfuerspam.de> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> |
||
|
Stefan Herdler
|
23aebcf131 |
media: ttpci: coding style fixes: assign_in_if
This patch fixes the following checkpatch errors: ERROR:ASSIGN_IN_IF: do not use assignment in if condition Signed-off-by: Stefan Herdler <herdler@nurfuerspam.de> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> |