summaryrefslogtreecommitdiff
path: root/fs/xfs/xfs_dquot.c
AgeCommit message (Collapse)Author
2018-08-07xfs: remove dead error handling code in xfs_dquot_disk_alloc()Brian Foster
Colin Ian King reports that commit 82ff27bc52 ("xfs: automatic dfops buffer relogging") leaves around some dead error handling code in xfs_dquot_disk_alloc(). This was discovered via Coverity scan. Since the associated commit eliminates the act of joining a buffer to a dfops, this intermediate error state is no longer possible and the error handling code can be removed. Since the caller cancels the transaction on error, which cancels the dfops, eliminate the unnecessary xfs_defer_cancel() call and error handling labels. Fixes: 82ff27bc52 ("xfs: automatic dfops buffer relogging") Reported-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2018-08-02xfs: cancel dfops on xfs_defer_finish() errorBrian Foster
The current semantics of xfs_defer_finish() require the caller to call xfs_defer_cancel() on error. This is slightly inconsistent with transaction commit error handling where a failed commit cleans up the transaction before returning. More significantly, the only requirement for exposure of ->dop_pending outside of xfs_defer_finish() is so that xfs_defer_cancel() can drain it on error. Since the only recourse of xfs_defer_finish() errors is cancellation, mirror the transaction logic and cancel remaining dfops before returning from xfs_defer_finish() with an error. Beside simplifying xfs_defer_finish() semantics, this ensures that xfs_defer_finish() always returns with an empty ->dop_pending and thus facilitates removal of the list from xfs_defer_ops. Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2018-08-02xfs: automatic dfops buffer reloggingBrian Foster
Buffers that are held across deferred operations are explicitly joined to the dfops structure to ensure appropriate relogging. While buffers are currently joined explicitly, we can detect the conditions that require relogging at dfops finish time by inspecting the transaction item list for held buffers. Replace the xfs_defer_bjoin() infrastructure with such detection and automatic relogging of held buffers. This eliminates the need for the per-dfops buffer list, replaced by an on-stack variant in xfs_defer_trans_roll(). Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2018-07-26xfs: drop unnecessary xfs_defer_finish() dfops parameterBrian Foster
Every caller of xfs_defer_finish() now passes the transaction and its associated ->t_dfops. The xfs_defer_ops parameter is therefore no longer necessary and can be removed. Since most xfs_defer_finish() callers also have to consider xfs_defer_cancel() on error, update the latter to also receive the transaction for consistency. The log recovery code contains an outlier case that cancels a dfops directly without an available transaction. Retain an internal wrapper to support this outlier case for the time being. Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Bill O'Donnell <billodo@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2018-07-26xfs: remove all boilerplate defer init/finish codeBrian Foster
At this point, the transaction subsystem completely manages deferred items internally such that the common and boilerplate xfs_trans_alloc() -> xfs_defer_init() -> xfs_defer_finish() -> xfs_trans_commit() sequence can be replaced with a simple transaction allocation and commit. Remove all such boilerplate deferred ops code. In doing so, we change each case over to use the dfops in the transaction and specifically eliminate: - The on-stack dfops and associated xfs_defer_init() call, as the internal dfops is initialized on transaction allocation. - xfs_bmap_finish() calls that precede a final xfs_trans_commit() of a transaction. - xfs_defer_cancel() calls in error handlers that precede a transaction cancel. The only deferred ops calls that remain are those that are non-deterministic with respect to the final commit of the associated transaction or are open-coded due to special handling. Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Bill O'Donnell <billodo@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2018-07-11xfs: remove xfs_defer_init() firstblock paramBrian Foster
All but one caller of xfs_defer_init() passes in the ->t_firstblock of the associated transaction. The one outlier is xlog_recover_process_intents(), which simply passes a dummy value because a valid pointer is required. This firstblock variable can simply be removed. At this point we could remove the xfs_defer_init() firstblock parameter and initialize ->t_firstblock directly. Even that is not necessary, however, because ->t_firstblock is automatically reinitialized in the new transaction on a transaction roll. Since xfs_defer_init() should never occur more than once on a particular transaction (since the corresponding finish will roll it), replace the reinit from xfs_defer_init() with an assert that verifies the transaction has a NULLFSBLOCK firstblock. Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2018-07-11xfs: use ->t_firstblock in dq allocBrian Foster
Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2018-07-11xfs: remove xfs_bmapi_write() firstblock paramBrian Foster
All callers pass ->t_firstblock from the current transaction. Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2018-07-11xfs: use ->t_firstblock for all xfs_bmapi_write() callersBrian Foster
Convert all xfs_bmapi_write() users to ->t_firstblock. Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2018-07-11xfs: refactor dfops init to attach to transactionBrian Foster
Most callers of xfs_defer_init() immediately attach the dfops structure to a transaction. Add a transaction parameter to eliminate much of this boilerplate code. This also helps self-document the fact that many codepaths now expect a dfops pointer implicitly via xfs_trans->t_dfops. Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2018-07-11xfs: remove xfs_bmapi_write() dfops paramBrian Foster
Now that all callers use ->t_dfops, the xfs_bmapi_write() dfops parameter is no longer necessary. Remove it and access ->t_dfops directly. This patch does not change behavior. Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2018-07-11xfs: use ->t_dfops in dqalloc transactionBrian Foster
xfs_dquot_disk_alloc() receives a transaction from the caller and passes a local dfops along to xfs_bmapi_write(). If we attach this dfops to the transaction, we have to make sure to clear it before returning to avoid invalid access of stack memory. Since xfs_qm_dqread_alloc() is the only caller, pull dfops into the caller and attach it to the transaction to eliminate this pattern entirely. Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2018-06-06xfs: convert to SPDX license tagsDave Chinner
Remove the verbose license text from XFS files and replace them with SPDX tags. This does not change the license of any of the code, merely refers to the common, up-to-date license files in LICENSES/ This change was mostly scripted. fs/xfs/Makefile and fs/xfs/libxfs/xfs_fs.h were modified by hand, the rest were detected and modified by the following command: for f in `git grep -l "GNU General" fs/xfs/` ; do echo $f cat $f | awk -f hdr.awk > $f.new mv -f $f.new $f done And the hdr.awk script that did the modification (including detecting the difference between GPL-2.0 and GPL-2.0+ licenses) is as follows: $ cat hdr.awk BEGIN { hdr = 1.0 tag = "GPL-2.0" str = "" } /^ \* This program is free software/ { hdr = 2.0; next } /any later version./ { tag = "GPL-2.0+" next } /^ \*\// { if (hdr > 0.0) { print "// SPDX-License-Identifier: " tag print str print $0 str="" hdr = 0.0 next } print $0 next } /^ \* / { if (hdr > 1.0) next if (hdr > 0.0) { if (str != "") str = str "\n" str = str $0 next } print $0 next } /^ \*/ { if (hdr > 0.0) next print $0 next } // { if (hdr > 0.0) { if (str != "") str = str "\n" str = str $0 next } print $0 } END { } $ Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2018-05-15xfs: refactor dquot iterationDarrick J. Wong
Create a helper function to iterate all the dquots of a given type in the system, and refactor the dquot scrub to use it. This will get more use in the quota repair code. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2018-05-10xfs: replace XFS_QMOPT_DQALLOC with a simple booleanDarrick J. Wong
DQALLOC is only ever used with xfs_qm_dqget*, and the only flag that the _dqget family of functions cares about is DQALLOC. Therefore, change it to a boolean 'can alloc?' flag for the dqget interfaces where that makes sense. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com>
2018-05-10xfs: remove direct calls to _qm_dqreadDarrick J. Wong
The quota initialization code needs an "uncached" variant of _dqget to read in default quota limits and timers before the dquot cache is fully set up. We've already split up _dqget into its component pieces so create a fourth variant to address this need, and make dqread internal to xfs_dquot.c again. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2018-05-10xfs: refactor xfs_qm_dqtobp and xfs_qm_dqallocDarrick J. Wong
Separate the disk dquot read and allocation functionality into two helper functions, then refactor dqread to call them directly. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com>
2018-05-10xfs: refactor incore dquot initialization functionsDarrick J. Wong
Create two incore dquot initialization functions that will help us to disentangle dqget and dqread. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2018-05-10xfs: split out dqget for inodes from regular dqgetDarrick J. Wong
There are two uses of dqget here -- one is to return the dquot for a given type and id, and the other is to return the dquot for a given type and inode. Those are two separate things, so split them into two smaller functions. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2018-05-10xfs: delegate dqget input checks to helper functionDarrick J. Wong
Move the dqget input checks to a separate function in preparation for splitting up the dqget functionality. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2018-05-10xfs: refactor dquot cache handlingDarrick J. Wong
Delegate the dquot cache handling (radix tree lookup and insertion) to separate helper functions so that we can continue to simplify the body of dqget. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2018-05-10xfs: refactor XFS_QMOPT_DQNEXT out of existenceDarrick J. Wong
There's only one caller of DQNEXT and its semantics can be moved into a separate function, so create the function and get rid of the flag. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2018-05-10xfs: release new dquot buffer on defer_finish errorDarrick J. Wong
In commit efa092f3d4c6 "[XFS] Fixes a bug in the quota code when allocating a new dquot record", we allocate a new dquot block, grab a buffer to initialize it, and return the locked initialized dquot buffer to the caller for further in-core dquot initialization. Unfortunately, if the _bmap_finish errored out, _qm_dqalloc would also error out without bothering to free the (locked) buffer. Leaking a locked buffer caused hangs in generic/388 when quotas are enabled. Furthermore, the _bmap_finish -> _defer_finish conversion in 310a75a3c6c747 ("xfs: change xfs_bmap_{finish,cancel,init,free} -> xfs_defer_*") failed to observe that the buffer was held going into _defer_finish and therefore failed to notice that the buffer lock is /not/ maintained afterwards. Now that we can bjoin a buffer to a defer_ops, use this mechanism to ensure that the buffer stays locked across the _defer_finish. Release the holds and locks on the buffer as appropriate if we have to error out. There is a subtlety here for the caller in that the buffer emerges locked and held to the transaction, so if the _trans_commit fails we have to release the buffer explicitly. This fixes the unmount hang in generic/388 when quotas are enabled. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com>
2018-05-10xfs: log item flags are racyDave Chinner
The log item flags contain a field that is protected by the AIL lock - the XFS_LI_IN_AIL flag. We use non-atomic RMW operations to set and clear these flags, but most of the updates and checks are not done with the AIL lock held and so are susceptible to update races. Fix this by changing the log item flags to use atomic bitops rather than be reliant on the AIL lock for update serialisation. Signed-Off-By: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2018-05-09xfs: add full xfs_dqblk verifierEric Sandeen
Add an xfs_dqblk verifier so that it can check the uuid on V5 filesystems; it calls the existing xfs_dquot_verify verifier to validate the xfs_disk_dquot_t contained inside it. This lets us move the uuid verification out of the crc verifier, which makes little sense. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2018-05-09xfs: remove unused flags arg from xfs_dquot_verifyEric Sandeen
Long ago the flags argument was used to determine whether to issue warnings about corruptions, but that's done elsewhere now and the flag is unused here, so remove it. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2018-03-11xfs: Rename xa_ elements to ail_Matthew Wilcox
This is a simple rename, except that xa_ail becomes ail_head. Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2018-03-11xfs: don't iunlock the quota ip when quota blockDarrick J. Wong
In xfs_qm_dqalloc, we join the locked quota inode to the transaction we use to allocate blocks. If the allocation or mapping fails, we're not allowed to unlock the inode because the transaction code is in charge of unlocking it for us. Therefore, remove the iunlock call to avoid blowing asserts about unbalanced locking + mount hang. Found by corrupting the AGF and allocating space in the filesystem (quotacheck) immediately after mount. The upcoming agfl wrapping fixup test will trigger this scenario. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com>
2018-01-08xfs: standardize quota verification function outputsDarrick J. Wong
Rename xfs_dqcheck to xfs_dquot_verify and make it return an xfs_failaddr_t like every other structure verifier function. This enables us to check on-disk quotas in the same way that we check everything else. Callers are now responsible for logging errors, as XFS_QMOPT_DOWARN goes away. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Dave Chinner <dchinner@redhat.com>
2018-01-08xfs: separate dquot repair into a separate functionDarrick J. Wong
Move the dquot repair code into a separate function and remove XFS_QMOPT_DQREPAIR in favor of calling the helper directly. Remove other dead code because quotacheck is the only caller of DQREPAIR. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Dave Chinner <dchinner@redhat.com>
2017-11-30xfs: Properly retry failed dquot items in case of error during buffer writebackCarlos Maiolino
Once the inode item writeback errors is already fixed, it's time to fix the same problem in dquot code. Although there were no reports of users hitting this bug in dquot code (at least none I've seen), the bug is there and I was already planning to fix it when the correct approach to fix the inodes part was decided. This patch aims to fix the same problem in dquot code, regarding failed buffers being unable to be resubmitted once they are flush locked. Tested with the recently test-case sent to fstests list by Hou Tao. Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2017-11-06xfs: remove unreachable error injection code in xfs_qm_dqgetChristoph Hellwig
Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2017-11-06xfs: introduce the xfs_iext_cursor abstractionChristoph Hellwig
Add a new xfs_iext_cursor structure to hide the direct extent map index manipulations. In addition to the existing lookup/get/insert/ remove and update routines new primitives to get the first and last extent cursor, as well as moving up and down by one extent are provided. Also new are convenience to increment/decrement the cursor and retreive the new extent, as well as to peek into the previous/next extent without updating the cursor and last but not least a macro to iterate over all extents in a fork. [darrick: rename for_each_iext to for_each_xfs_iext] Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2017-09-01xfs: remove the ip argument to xfs_defer_finishChristoph Hellwig
And instead require callers to explicitly join the inode using xfs_defer_ijoin. Also consolidate the defer error handling in a few places using a goto label. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2017-07-13Revert "xfs: grab dquots without taking the ilock"Christoph Hellwig
This reverts commit 50e0bdbe9f48f98bb02eac7030d682f4716884ae. The new XFS_QMOPT_NOLOCK isn't used at all, and conditional locking based on a flag is always the wrong thing to do - we should be having helpers that can be called without the lock instead. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2017-07-05xfs: fix contiguous dquot chunk iteration livelockBrian Foster
The patch below updated xfs_dq_get_next_id() to use the XFS iext lookup helpers to locate the next quota id rather than to seek for data in the quota file. The updated code fails to correctly handle the case where the quota inode might have contiguous chunks part of the same extent. In this case, the start block offset is calculated based on the next expected id but the extent lookup returns the same start offset as for the previous chunk. This causes the returned id to go backwards and livelocks the quota iteration. This problem is reproduced intermittently by generic/232. To handle this case, check whether the startoff from the extent lookup is behind the startoff calculated from the next quota id. If so, bump up got.br_startoff to the specific file offset that is expected to hold the next dquot chunk. Fixes: bda250dbaf39 ("xfs: rewrite xfs_dq_get_next_id using xfs_iext_lookup_extent") Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2017-07-01xfs: rewrite xfs_dq_get_next_id using xfs_iext_lookup_extentChristoph Hellwig
This goes straight to a single lookup in the extent list and avoids a roundtrip through two layers that don't add any value for the simple quoata file that just has data or holes and no page cache, delayed allocation, unwritten extent or COW fork (which btw, doesn't seem to be handled by the existing SEEK HOLE/DATA code). Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Eric Sandeen <sandeen@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2017-06-27xfs: grab dquots without taking the ilockDarrick J. Wong
Add a new dqget flag that grabs the dquot without taking the ilock. This will be used by the scrubber (which will have already grabbed the ilock) to perform basic sanity checking of the quota data. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com>
2017-06-19xfs: remove double-underscore integer typesDarrick J. Wong
This is a purely mechanical patch that removes the private __{u,}int{8,16,32,64}_t typedefs in favor of using the system {u,}int{8,16,32,64}_t typedefs. This is the sed script used to perform the transformation and fix the resulting whitespace and indentation errors: s/typedef\t__uint8_t/typedef __uint8_t\t/g s/typedef\t__uint/typedef __uint/g s/typedef\t__int\([0-9]*\)_t/typedef int\1_t\t/g s/__uint8_t\t/__uint8_t\t\t/g s/__uint/uint/g s/__int\([0-9]*\)_t\t/__int\1_t\t\t/g s/__int/int/g /^typedef.*int[0-9]*_t;$/d Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2017-01-17xfs: don't wrap ID in xfs_dq_get_next_idEric Sandeen
The GETNEXTQOTA ioctl takes whatever ID is sent in, and looks for the next active quota for an user equal or higher to that ID. But if we are at the maximum ID and then ask for the "next" one, we may wrap back to zero. In this case, userspace may loop forever, because it will start querying again at zero. We'll fix this in userspace as well, but for the kernel, return -ENOENT if we ask for the next quota ID past UINT_MAX so the caller knows to stop. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2016-08-03xfs: rename flist/free_list to dfopsDarrick J. Wong
Mechanical change of flist/free_list to dfops, since they're now deferred ops, not just a freeing list. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-08-03xfs: change xfs_bmap_{finish,cancel,init,free} -> xfs_defer_*Darrick J. Wong
Drop the compatibility shims that we were using to integrate the new deferred operation mechanism into the existing code. No new code. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-08-03xfs: rework xfs_bmap_free callers to use xfs_defer_opsDarrick J. Wong
Restructure everything that used xfs_bmap_free to use xfs_defer_ops instead. For now we'll just remove the old symbols and play some cpp magic to make it work; in the next patch we'll actually rename everything. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-07-22xfs: allocate log vector buffers outside CIL context lockDave Chinner
One of the problems we currently have with delayed logging is that under serious memory pressure we can deadlock memory reclaim. THis occurs when memory reclaim (such as run by kswapd) is reclaiming XFS inodes and issues a log force to unpin inodes that are dirty in the CIL. The CIL is pushed, but this will only occur once it gets the CIL context lock to ensure that all committing transactions are complete and no new transactions start being committed to the CIL while the push switches to a new context. The deadlock occurs when the CIL context lock is held by a committing process that is doing memory allocation for log vector buffers, and that allocation is then blocked on memory reclaim making progress. Memory reclaim, however, is blocked waiting for a log force to make progress, and so we effectively deadlock at this point. To solve this problem, we have to move the CIL log vector buffer allocation outside of the context lock so that memory reclaim can always make progress when it needs to force the log. The problem with doing this is that a CIL push can take place while we are determining if we need to allocate a new log vector buffer for an item and hence the current log vector may go away without warning. That means we canot rely on the existing log vector being present when we finally grab the context lock and so we must have a replacement buffer ready to go at all times. To ensure this, introduce a "shadow log vector" buffer that is always guaranteed to be present when we gain the CIL context lock and format the item. This shadow buffer may or may not be used during the formatting, but if the log item does not have an existing log vector buffer or that buffer is too small for the new modifications, we swap it for the new shadow buffer and format the modifications into that new log vector buffer. The result of this is that for any object we modify more than once in a given CIL checkpoint, we double the memory required to track dirty regions in the log. For single modifications then we consume the shadow log vectorwe allocate on commit, and that gets consumed by the checkpoint. However, if we make multiple modifications, then the second transaction commit will allocate a shadow log vector and hence we will end up with double the memory usage as only one of the log vectors is consumed by the CIL checkpoint. The remaining shadow vector will be freed when th elog item is freed. This can probably be optimised in future - access to the shadow log vector is serialised by the object lock (as opposited to the active log vector, which is controlled by the CIL context lock) and so we can probably free shadow log vector from some objects when the log item is marked clean on removal from the AIL. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-05-20Merge branch 'xfs-4.7-misc-fixes' into for-nextDave Chinner
2016-04-06xfs: mute some sparse warningsEryu Guan
These three warnings are fixed: fs/xfs/xfs_inode.c:1033:44: warning: Using plain integer as NULL pointer fs/xfs/xfs_inode_item.c:525:20: warning: context imbalance in 'xfs_inode_item_push' - unexpected unlock fs/xfs/xfs_dquot.c:696:1: warning: symbol 'xfs_dq_get_next_id' was not declared. Should it be static? Signed-off-by: Eryu Guan <guaneryu@gmail.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-04-06xfs: better xfs_trans_alloc interfaceChristoph Hellwig
Merge xfs_trans_reserve and xfs_trans_alloc into a single function call that returns a transaction with all the required log and block reservations, and which allows passing transaction flags directly to avoid the cumbersome _xfs_trans_alloc interface. While we're at it we also get rid of the transaction type argument that has been superflous since we stopped supporting the non-CIL logging mode. The guts of it will be removed in another patch. [dchinner: fixed transaction leak in error path in xfs_setattr_nonsize] Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-02-08xfs: Split default quota limits by quota typeCarlos Maiolino
Default quotas are globally set due historical reasons. IRIX only supported user and project quotas, and default quota was only applied to user quotas. In Linux, when a default quota is set, all different quota types inherits the same default value. An user with a quota limit larger than the default quota value, will still be limited to the default value because the group quotas also inherits the default quotas. Unless the group which the user belongs to have a custom quota limit set. This patch aims to split the default quota value by quota type. Allowing each quota type having different default values. Default time limits are still set globally. XFS does not set a per-user/group timer, but a single global timer. For changing this behavior, some changes should be made in user-space tools another bugs being fixed. Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com> Reviewed-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-02-08xfs: wire up Q_XGETNEXTQUOTA / get_nextdqblkEric Sandeen
Add code to allow the Q_XGETNEXTQUOTA quotactl to quickly find all active quotas by examining the quota inode, and skipping over unallocated or uninitialized regions. Userspace can then use this interface rather than i.e. a getpwent() loop when asked to report all active quotas. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-02-08xfs: get quota inode from mp & flags rather than dqpEric Sandeen
Allow us to get the appropriate quota inode from any mp & quota flags, not necessarily associated with a particular dqp. Needed for when we are searching for the next active ID with quotas and we want to examine the quota inode. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>