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Get rid of the largely pointless xfs_cross_rename now that we've
refactored its parent.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Create a new libxfs function to rename two directory entries. The
upcoming metadata directory feature will need this to replace a metadata
inode directory entry.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Create a new libxfs function to exchange two directory entries.
The upcoming metadata directory feature will need this to replace a
metadata inode directory entry.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Create a new libxfs function to remove a (name, inode) entry from a
directory. The upcoming metadata directory feature will need this to
create a metadata directory tree.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Create a libxfs helper function that marks an inode free on disk.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Create a new libxfs function to link an existing inode into a directory.
The upcoming metadata directory feature will need this to create a
metadata directory tree.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Create a new libxfs function to link a newly created inode into a
directory. The upcoming metadata directory feature will need this to
create a metadata directory tree.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Move xfs_bumplink and xfs_droplink to libxfs.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Move xfs_iunlink and xfs_iunlink_remove to libxfs.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Create a helper that calls dqalloc to allocate and grab a reference to
dquots for the user, group, and project ids listed in an icreate
structure. This simplifies the creat-related dqalloc callsites
scattered around the code base.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Move the initialization of the xfs_icreate_args structure out of
xfs_create and xfs_create_tempfile into their callers so that we can set
the new inode's attributes in one place and pass that through instead of
open coding the collection of attributes all over the code.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Move all the code that initializes a new inode's attributes from the
icreate_args structure and the parent directory into libxfs.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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There are two parts to initializing a newly allocated inode: setting up
the incore structures, and initializing the new inode core based on the
parent inode and the current user's environment. The initialization
code is not specific to the kernel, so we would like to share that with
userspace by hoisting it to libxfs. Therefore, split xfs_icreate into
separate functions to prepare for the next few patches.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Use xfs_trans_ichgtime to set the inode times when allocating an inode,
instead of open-coding them here.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Enable xfs_trans_ichgtime to change the inode access time so that we can
use this function to set inode times when allocating inodes instead of
open-coding it.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Callers that want to create an inode currently pass all possible file
attribute values for the new inode into xfs_init_new_inode as ten
separate parameters. This causes two code maintenance issues: first, we
have large multi-line call sites which programmers must read carefully
to make sure they did not accidentally invert a value. Second, all
three file id parameters must be passed separately to the quota
functions; any discrepancy results in quota count errors.
Clean this up by creating a new icreate_args structure to hold all this
information, some helpers to initialize them properly, and make the
callers pass this structure through to the creation function, whose name
we shorten to xfs_icreate. This eliminates the issues, enables us to
keep the inode init code in sync with userspace via libxfs, and is
needed for future metadata directory tree management.
(A subsequent cleanup will also fix the quota alloc calls.)
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Move the project id get and set functions into libxfs.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Hoist the inode flag conversion functions into libxfs so that we can
keep them in sync. Do this by creating a new xfs_inode_util.c file in
libxfs.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Move the extent size helpers to xfs_bmap.c in libxfs since they're used
there already.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Move these inode predicate functions to xfs_inode.[ch] since they're not
reflink functions.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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If we can't find a parent for a file, move it to the orphanage.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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It's possible that the dentry cache can tell us the parent of a
directory. Therefore, when repairing directory dot dot entries, query
the dcache as a last resort before scanning the entire filesystem.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Teach the online repair code to fix directory '..' entries (aka
directory parent pointers). Since this requires us to know how to scan
every dirent in every directory on the filesystem, we can reuse the
parent scanner components to validate (or find!) the correct parent
entry when rebuilding directories too.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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If a directory looks like it's in bad shape, try to sift through the
rubble to find whatever directory entries we can, scan the directory
tree for the parent (if needed), stage the new directory contents in a
temporary file and use the atomic extent swapping mechanism to commit
the results in bulk. As a side effect of this patch, directory
inactivation will be able to purge any leftover dir blocks.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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If an attr block indicates that it could use compaction, set the preen
flag to have the attr fork rebuilt, since the attr fork rebuilder can
take care of that for us.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
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If the extended attributes look bad, try to sift through the rubble to
find whatever keys/values we can, stage a new attribute structure in a
temporary file and use the atomic extent swapping mechanism to commit
the results in bulk.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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In an upcoming patch, we will need to be able to look for buffers
containing xattr metadata without necessarily being able to walk the
xattr structures to find all the buffers. Repair already has most of
the code needed to scan the buffer cache, so hoist these utility
functions.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Create a simple 'blob array' data structure for storage of arbitrarily
sized metadata objects that will be used to reconstruct metadata. For
the intended usage (temporarily storing extended attribute names and
values) we only have to support storing objects and retrieving them.
Use the xfile abstraction to store the attribute information in memory
that can be swapped out.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Repair the realtime summary data by constructing a new rtsummary file in
the scrub temporary file, then atomically swapping the contents.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Teach the online repair code how to create temporary files or
directories. These temporary files can be used to stage reconstructed
information until we're ready to perform an atomic extent swap to commit
the new metadata.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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We're about to start adding functionality that uses internal inodes that
are private to XFS. What this means is that userspace should never be
able to access any information about these files, and should not be able
to open these files by handle. Callers are not allowed to link these
files into the directory tree, which should suffice to make these
private inodes actually private.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Add the atomic swapext feature to the set of features that we will
permit.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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The VFS exchange-range alignment checks use (fast) bitmasks to perform
block alignment checks on the exchange parameters. Unfortunately,
bitmasks require that the alignment size be a power of two. This isn't
true for realtime devices, so we have to copy-pasta the VFS checks using
long division for this to work properly.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Now that bmap items support the realtime device, we can add the
necessary pieces to the atomic extent swapping code to support such
things.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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The previous commit added a new swapext flag that enables us to perform
post-swap processing on file2 once we're done swapping the extent maps.
Now add this ability for directories.
This isn't used anywhere right now, but we need to have the basic ondisk
flags in place so that a future online directory repair feature can
create salvaged dirents in a temporary directory and swap the data forks
when ready. If one file is in extents format and the other is inline,
we will have to promote both to extents format to perform the swap.
After the swap, we can try to condense the fixed directory down to
inline format if possible.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Add a new swapext flag that enables us to perform post-swap processing
on file2 once we're done swapping the extent maps. If we were swapping
the extended attributes, we want to be able to convert file2's attr fork
from block to inline format.
This isn't used anywhere right now, but we need to have the basic ondisk
flags in place so that a future online xattr repair feature can create
salvaged attrs in a temporary file and swap the attr forks when ready.
If one file is in extents format and the other is inline, we will have to
promote both to extents format to perform the swap. After the swap, we
can try to condense the fixed file's attr fork back down to inline
format if possible.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Migrate the old XFS_IOC_SWAPEXT implementation to use our shiny new one.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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If userspace permits non-atomic swap operations, use the older code
paths to implement the same functionality.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Refactor the old data fork swap function to use the new reflink flag
helpers to propagate reflink flags between the two files.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Consolidate the bmbt owner change scan code in xfs_swap_extent_forks,
since it's not needed for the deferred bmap log item swapext
implementation.
The goal is to package up all three implementations into functions that
have the same preconditions and leave the system in the same state.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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The inner loop of xfs_swap_extents_rmap does the same work as
xfs_swapext_finish_one, so adapt it to use that. Doing so has the side
benefit that the older code path no longer wastes its time remapping
shared extents.
This forms the basis of the non-atomic swaprange implementation.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Add an errortag so that we can test recovery of swapext log items.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Add a function to handle file range exchange requests from the vfs.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Now that we've created the skeleton of a log intent item to track and
restart extent swap operations, add the upper level logic to commit
intent items and turn them into concrete work recorded in the log. We
use the deferred item "multihop" feature that was introduced a few
patches ago to constrain the number of active swap operations to one per
thread.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Introduce a new intent log item to handle swapping extents.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Create a log incompat flag so that we only attempt to process swap
extent log items if the filesystem supports it.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Create a helper function that can compute if a 64-bit number is an
integer multiple of a 32-bit number, where the 32-bit number is not
required to be an even power of two. This is needed for some new code
for the realtime device, where we can set 37k allocation units and then
have to remap them.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Create a new helper function to calculate the fundamental allocation
unit (i.e. the smallest unit of space we can allocate) of a file.
Things are going to get hairy with range-exchange on the realtime
device, so prepare for this now.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Introduce a new ioctl to handle swapping ranges of bytes between files.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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When log recovery tries to recover a transaction that had log intent
items attached to it, it has to save certain parts of the transaction
state (reservation, dfops chain, inodes with no automatic unlock) so
that it can finish single-stepping the recovered transactions before
finishing the chains.
This is done with the xfs_defer_ops_capture and xfs_defer_ops_continue
functions. Right now they open-code this functionality, so let's port
this to the formalized resource capture structure that we introduced in
the previous patch. This enables us to hold up to two inodes and two
buffers during log recovery, the same way we do for regular runtime.
With this patch applied, we'll be ready to support atomic extent swap
which holds two inodes; and logged xattrs which holds one inode and one
xattr leaf buffer.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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