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2017-11-06xfs: pass an on-disk extent to xfs_bmbt_validate_extentChristoph Hellwig3-10/+9
This prepares for getting rid of the current in-memory extent format. At the end of the series we will change the calling convention again to pass the xfs_bmbt_irec structure once it is available everywhere. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Brian Foster <[email protected]> Reviewed-by: Darrick J. Wong <[email protected]> Signed-off-by: Darrick J. Wong <[email protected]>
2017-11-06xfs: treat idx as a cursor in xfs_bmap_collapse_extentsChristoph Hellwig1-11/+6
Stop poking before and after the index and just increment or decrement it while doing our operations on it to prepare for a new extent list implementation. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Brian Foster <[email protected]> Reviewed-by: Darrick J. Wong <[email protected]> Signed-off-by: Darrick J. Wong <[email protected]>
2017-11-06xfs: treat idx as a cursor in xfs_bmap_del_extent_*Christoph Hellwig1-3/+3
Stop poking before and after the index and just increment or decrement it while doing our operations on it to prepare for a new extent list implementation. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Brian Foster <[email protected]> Reviewed-by: Darrick J. Wong <[email protected]> Signed-off-by: Darrick J. Wong <[email protected]>
2017-11-06xfs: treat idx as a cursor in xfs_bmap_add_extent_unwritten_realChristoph Hellwig1-17/+18
Stop poking before and after the index and just increment or decrement it while doing our operations on it to prepare for a new extent list implementation. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Brian Foster <[email protected]> Reviewed-by: Darrick J. Wong <[email protected]> Signed-off-by: Darrick J. Wong <[email protected]>
2017-11-06xfs: treat idx as a cursor in xfs_bmap_add_extent_hole_realChristoph Hellwig1-5/+5
Stop poking before and after the index and just increment or decrement it while doing our operations on it to prepare for a new extent list implementation. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Brian Foster <[email protected]> Reviewed-by: Darrick J. Wong <[email protected]> Signed-off-by: Darrick J. Wong <[email protected]>
2017-11-06xfs: treat idx as a cursor in xfs_bmap_add_extent_hole_delayChristoph Hellwig1-4/+5
Stop poking before and after the index and just increment or decrement it while doing our operations on it to prepare for a new extent list implementation. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Brian Foster <[email protected]> Reviewed-by: Darrick J. Wong <[email protected]> Signed-off-by: Darrick J. Wong <[email protected]>
2017-11-06xfs: treat idx as a cursor in xfs_bmap_add_extent_delay_realChristoph Hellwig1-11/+16
Stop poking before and after the index and just increment or decrement it while doing our operations on it to prepare for a new extent list implementation. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Brian Foster <[email protected]> Reviewed-by: Darrick J. Wong <[email protected]> Signed-off-by: Darrick J. Wong <[email protected]>
2017-11-06xfs: remove a duplicate assignment in xfs_bmap_add_extent_delay_realChristoph Hellwig1-1/+1
Reported-by: Brian Foster <[email protected]> Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Brian Foster <[email protected]> Reviewed-by: Darrick J. Wong <[email protected]> Signed-off-by: Darrick J. Wong <[email protected]>
2017-11-06xfs: don't create overlapping extents in xfs_bmap_add_extent_delay_realChristoph Hellwig1-4/+4
Two cases in xfs_bmap_add_extent_delay_real currently insert a new extent before updating the existing one that is being split. While this works fine with a simple extent list, a more complex tree can't easily cope with overlapping extent. Reshuffle the code a bit to update the slot of the existing delalloc extent to the new real extent before inserting the shortened delalloc extent before or after it. This avoids the overlapping extents while still allowing to update the br_startblock field of the delalloc extent with the updated indirect block reservation. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Brian Foster <[email protected]> Reviewed-by: Darrick J. Wong <[email protected]> Signed-off-by: Darrick J. Wong <[email protected]>
2017-11-02License cleanup: add SPDX GPL-2.0 license identifier to files with no licenseGreg Kroah-Hartman1-0/+1
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <[email protected]> Reviewed-by: Philippe Ombredanne <[email protected]> Reviewed-by: Thomas Gleixner <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2017-11-01xfs: convert remaining xfs_sb_version_... checks to boolDave Chinner1-2/+2
Some were missed in the pass that converted the function return values from int to bool. Update the remaining ones for consistency. Signed-Off-By: Dave Chinner <[email protected]> Reviewed-by: Darrick J. Wong <[email protected]> Signed-off-by: Darrick J. Wong <[email protected]>
2017-11-01xfs: move error injection tags into their own fileDarrick J. Wong10-0/+115
Move the error injection tag names into a libxfs header so that we can share it between kernel and userspace. Signed-off-by: Darrick J. Wong <[email protected]> Reviewed-by: Dave Chinner <[email protected]>
2017-11-01xfs: remove inode log format typedefDarrick J. Wong1-2/+2
Remove xfs_inode_log_format_t now that xfs_inode_log_format is explicitly padded and therefore is a real on-disk structure. This enables xfs/122 to check the size of the structure. Signed-off-by: Darrick J. Wong <[email protected]> Reviewed-by: Dave Chinner <[email protected]>
2017-10-31xfs: remove redundant assignment to variable bitColin Ian King1-1/+0
Variable bit is being assigned a value that is never read, hence the assignment is redundant and can be removed. Cleans up clang warning: fs/xfs/libxfs/xfs_rtbitmap.c:675:3: warning: Value stored to 'bit' is never read Signed-off-by: Colin Ian King <[email protected]> Reviewed-by: Darrick J. Wong <[email protected]> Signed-off-by: Darrick J. Wong <[email protected]>
2017-10-27xfs: compare btree block keys to parent block's keys during scrubDarrick J. Wong2-2/+6
When we're done checking all the records/keys in a btree block, compute the low and high key of the block and compare them to the associated key in the parent btree block. Signed-off-by: Darrick J. Wong <[email protected]> Reviewed-by: Brian Foster <[email protected]>
2017-10-27xfs: abort dir/attr btree operation if btree is obviously weirdDarrick J. Wong1-1/+21
Abort an dir/attr btree operation if the attr btree has obvious problems like loops back to the root or pointers don't point down the tree. Found by fuzzing btree[0].before to zero in xfs/402, which livelocks on the cycle in the attr btree. Apply the same checks to xfs_da3_node_lookup_int. Signed-off-by: Darrick J. Wong <[email protected]> Reviewed-by: Brian Foster <[email protected]>
2017-10-26xfs: add a new xfs_iext_lookup_extent_before helperChristoph Hellwig3-20/+32
This helper looks up the last extent the covers space before the passed in block number. This is useful for truncate and similar operations that operate backwards over the extent list. For xfs_bunmapi it also is a slight optimization as we can return early if there are not extents at or below the end of the to be truncated range. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Darrick J. Wong <[email protected]> Signed-off-by: Darrick J. Wong <[email protected]>
2017-10-26xfs: merge xfs_bmap_read_extents into xfs_iread_extentsChristoph Hellwig3-75/+51
xfs_iread_extents is just a trivial wrapper, there is no good reason to keep the two separate. [darrick: minor fixups having left xfs_bmbt_validate_extent intact] Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Darrick J. Wong <[email protected]> Signed-off-by: Darrick J. Wong <[email protected]>
2017-10-26xfs: rewrite xfs_bmap_first_unused to make better use of xfs_iext_get_extentChristoph Hellwig1-30/+26
Look at the return value of xfs_iext_get_extent instead of figuring out the extent count first and looping up to it. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Darrick J. Wong <[email protected]> Signed-off-by: Darrick J. Wong <[email protected]>
2017-10-26xfs: don't rely on extent indices in xfs_bmap_insert_extentsChristoph Hellwig1-38/+9
Rewrite xfs_bmap_insert_extents so that we don't rely on extent indices except for iterating over them. Not being able to iterate to the previous extent or finding the extent that stop_fsb is in are sufficient exit conditions, and we don't need to do any extent count games given that: a) we already flushed all delalloc extents past our start offset before doing the operation b) xfs_iext_count() includes delalloc extents anyway Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Darrick J. Wong <[email protected]> Signed-off-by: Darrick J. Wong <[email protected]>
2017-10-26xfs: don't rely on extent indices in xfs_bmap_collapse_extentsChristoph Hellwig1-42/+12
Rewrite xfs_bmap_collapse_extents so that we don't rely on extent indices except for iterating over them. Not being able to iterate to the next extent is a sufficient exit condition, and we don't need to do any extent count games given that: a) we already flushed all delalloc extents past our start offset before doing the operation b) xfs_iext_count() includes delalloc extents anyway Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Darrick J. Wong <[email protected]> Signed-off-by: Darrick J. Wong <[email protected]>
2017-10-26xfs: update got in xfs_bmap_shift_update_extentChristoph Hellwig1-9/+7
This way the caller gets the proper updated extent returned in got. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Darrick J. Wong <[email protected]> Signed-off-by: Darrick J. Wong <[email protected]>
2017-10-26xfs: remove xfs_bmse_shift_oneChristoph Hellwig2-115/+71
Instead do the actual left and right shift work in the callers, and just keep a helper to update the bmap and rmap btrees as well as the in-core extent list. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Darrick J. Wong <[email protected]> Signed-off-by: Darrick J. Wong <[email protected]>
2017-10-26xfs: split xfs_bmap_shift_extentsChristoph Hellwig2-65/+142
Have a separate helper for insert vs collapse, as this prepares us for simplifying the code in the next patches. Also changed the done output argument to a bool intead of int for both new functions. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Darrick J. Wong <[email protected]> Signed-off-by: Darrick J. Wong <[email protected]>
2017-10-26xfs: remove XFS_BMAP_MAX_SHIFT_EXTENTSChristoph Hellwig2-38/+21
The define was always set to 1, which means looping until we reach is was dead code from the start. Also remove an initialization of next_fsb for the done case that doesn't fit the new code flow - it was never checked by the caller in the done case to start with. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Darrick J. Wong <[email protected]> Signed-off-by: Darrick J. Wong <[email protected]>
2017-10-26xfs: remove if_rdevChristoph Hellwig2-18/+21
We can simply use the i_rdev field in the Linux inode and just convert to and from the XFS dev_t when reading or logging/writing the inode. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Darrick J. Wong <[email protected]> Signed-off-by: Darrick J. Wong <[email protected]>
2017-10-26xfs: remove the never fully implemented UUID fork formatChristoph Hellwig6-30/+12
Remove the dead code dealing with the UUID fork format that was never implemented in Linux (and neither in IRIX as far as I know). Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Darrick J. Wong <[email protected]> Signed-off-by: Darrick J. Wong <[email protected]>
2017-10-26xfs: remove XFS_BMAP_TRACE_EXLISTChristoph Hellwig3-32/+8
Instead of looping over all extents in some debug-only helper just insert trace points into the loops that already exist in the calling functions. Also split the xfs_extlist trace point into one each for reading and writing extents from disk. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Darrick J. Wong <[email protected]> Signed-off-by: Darrick J. Wong <[email protected]>
2017-10-26xfs: move pre/post-bmap tracing into xfs_iext_update_extentChristoph Hellwig3-123/+55
xfs_iext_update_extent already has basically all the information needed to centralize the bmap pre/post tracing. We just need to pass inode + bmap state instead of the inode fork pointer to get all trace annotations. In addition to covering all the existing trace points this gives us tracing coverage for the extent shifting operations for free. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Darrick J. Wong <[email protected]> Signed-off-by: Darrick J. Wong <[email protected]>
2017-10-26xfs: remove post-bmap tracing in xfs_bmap_local_to_extentsChristoph Hellwig1-2/+0
Now that we use xfs_iext_insert this is already covered by the tracing in that function. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Darrick J. Wong <[email protected]> Signed-off-by: Darrick J. Wong <[email protected]>
2017-10-26xfs: make better use of the 'state' variable in xfs_bmap_del_extent_realChristoph Hellwig1-2/+1
We already have all the information about the fork a=D1=95 well as additional tracing information, so pass that to xfs_iext_remove(). Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Darrick J. Wong <[email protected]> Signed-off-by: Darrick J. Wong <[email protected]>
2017-10-26xfs: add a xfs_bmap_fork_to_state helperChristoph Hellwig2-36/+21
This creates the right initial bmap state from the passed in inode fork enum. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Darrick J. Wong <[email protected]> Signed-off-by: Darrick J. Wong <[email protected]>
2017-10-26xfs: scrub quota informationDarrick J. Wong1-1/+4
Perform some quick sanity testing of the disk quota information. Signed-off-by: Darrick J. Wong <[email protected]> Reviewed-by: Dave Chinner <[email protected]>
2017-10-26xfs: scrub realtime bitmap/summaryDarrick J. Wong2-1/+8
Perform simple tests of the realtime bitmap and summary. Signed-off-by: Darrick J. Wong <[email protected]> Reviewed-by: Dave Chinner <[email protected]>
2017-10-26xfs: scrub directory parent pointersDarrick J. Wong1-1/+2
Scrub parent pointers, sort of. For directories, we can ride the '..' entry up to the parent to confirm that there's at most one dentry that points back to this directory. Signed-off-by: Darrick J. Wong <[email protected]> Reviewed-by: Dave Chinner <[email protected]>
2017-10-26xfs: scrub symbolic linksDarrick J. Wong1-1/+2
Create the infrastructure to scrub symbolic link data. Signed-off-by: Darrick J. Wong <[email protected]> Reviewed-by: Dave Chinner <[email protected]>
2017-10-26xfs: scrub extended attributesDarrick J. Wong1-1/+2
Scrub the hash tree, keys, and values in an extended attribute structure. Refactor the attribute code to use the transaction if the caller supplied one to avoid buffer deadocks. Signed-off-by: Darrick J. Wong <[email protected]> Reviewed-by: Dave Chinner <[email protected]>
2017-10-26xfs: scrub directory metadataDarrick J. Wong3-2/+22
Scrub the hash tree and all the entries in a directory. Signed-off-by: Darrick J. Wong <[email protected]> Reviewed-by: Dave Chinner <[email protected]>
2017-10-26xfs: scrub inode block mappingsDarrick J. Wong1-1/+4
Scrub an individual inode's block mappings to make sure they make sense. Signed-off-by: Darrick J. Wong <[email protected]> Reviewed-by: Dave Chinner <[email protected]>
2017-10-26xfs: scrub inodesDarrick J. Wong1-1/+2
Scrub the fields within an inode. Signed-off-by: Darrick J. Wong <[email protected]> Reviewed-by: Dave Chinner <[email protected]>
2017-10-26xfs: scrub refcount btreesDarrick J. Wong1-1/+2
Plumb in the pieces necessary to check the refcount btree. If rmap is available, check the reference count by performing an interval query against the rmapbt. Signed-off-by: Darrick J. Wong <[email protected]> Reviewed-by: Dave Chinner <[email protected]>
2017-10-26xfs: scrub rmap btreesDarrick J. Wong1-1/+2
Check the reverse mapping records to make sure that the contents make sense. Signed-off-by: Darrick J. Wong <[email protected]> Reviewed-by: Dave Chinner <[email protected]>
2017-10-26xfs: scrub inode btreesDarrick J. Wong2-2/+4
Check the records of the inode btrees to make sure that the values make sense given the inode records themselves. Signed-off-by: Darrick J. Wong <[email protected]> Reviewed-by: Dave Chinner <[email protected]>
2017-10-26xfs: scrub free space btreesDarrick J. Wong1-1/+3
Check the extent records free space btrees to ensure that the values look sane. Signed-off-by: Darrick J. Wong <[email protected]> Reviewed-by: Dave Chinner <[email protected]>
2017-10-26xfs: scrub the AGIDarrick J. Wong1-1/+2
Add a forgotten check to the AGI verifier, then wire up the scrub infrastructure to check the AGI contents. Signed-off-by: Darrick J. Wong <[email protected]> Reviewed-by: Dave Chinner <[email protected]>
2017-10-26xfs: scrub AGF and AGFLDarrick J. Wong1-1/+3
Check the block references in the AGF and AGFL headers to make sure they make sense. Signed-off-by: Darrick J. Wong <[email protected]> Reviewed-by: Dave Chinner <[email protected]>
2017-10-26xfs: scrub the secondary superblocksDarrick J. Wong1-1/+2
Ensure that the geometry presented in the backup superblocks matches the primary superblock so that repair can recover the filesystem if that primary gets corrupted. Signed-off-by: Darrick J. Wong <[email protected]> Reviewed-by: Dave Chinner <[email protected]>
2017-10-26xfs: scrub the shape of a metadata btreeDarrick J. Wong2-2/+21
Create a function that can check the shape of a btree -- each block passes basic inspection and all the pointers look ok. In the next patch we'll add the ability to check the actual keys and records stored within the btree. Add some helper functions so that we report detailed scrub errors in a uniform manner in dmesg. These are helper functions for subsequent patches. Signed-off-by: Darrick J. Wong <[email protected]> Reviewed-by: Dave Chinner <[email protected]>
2017-10-26xfs: probe the scrub ioctlDarrick J. Wong1-1/+2
Create a probe scrubber with id 0. This will be used by xfs_scrub to probe the kernel's abilities to scrub (and repair) the metadata. We do this by validating the ioctl inputs from userspace, preparing the filesystem for a scrub (or a repair) operation, and immediately returning to userspace. Userspace can use the returned errno and structure state to decide (in broad terms) if scrub/repair are supported by the running kernel. Signed-off-by: Darrick J. Wong <[email protected]> Reviewed-by: Dave Chinner <[email protected]>
2017-10-26xfs: create an ioctl to scrub AG metadataDarrick J. Wong1-0/+53
Create an ioctl that can be used to scrub internal filesystem metadata. The new ioctl takes the metadata type, an (optional) AG number, an (optional) inode number and generation, and a flags argument. This will be used by the upcoming XFS online scrub tool. Signed-off-by: Darrick J. Wong <[email protected]> Reviewed-by: Dave Chinner <[email protected]>
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