- 24 1月, 2020 2 次提交
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由 Anand Jain 提交于
New sysfs attributes that track the filesystem status of devices, stored in the per-filesystem directory in /sys/fs/btrfs/FSID/devinfo . There's a directory for each device, with name corresponding to the numerical device id. in_fs_metadata - device is in the list of fs metadata missing - device is missing (no device node or block device) replace_target - device is target of replace writeable - writes from fs are allowed These attributes reflect the state of the device::dev_state and created at mount time. Sample output: $ pwd /sys/fs/btrfs/6e1961f1-5918-4ecc-a22f-948897b409f7/devinfo/1/ $ ls in_fs_metadata missing replace_target writeable $ cat missing 0 The output from these attributes are 0 or 1. 0 indicates unset and 1 indicates set. These attributes are readonly. It is observed that the device delete thread and sysfs read thread will not race because the delete thread calls sysfs kobject_put() which in turn waits for existing sysfs read to complete. Note for device replace devid swap: During the replace the target device temporarily assumes devid 0 before assigning the devid of the soruce device. In btrfs_dev_replace_finishing() we remove source sysfs devid using the function btrfs_sysfs_remove_devices_attr(), so after that call kobject_rename() to update the devid in the sysfs. This adds and calls btrfs_sysfs_update_devid() helper function to update the device id. Signed-off-by: NAnand Jain <anand.jain@oracle.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> [ update changelog ] Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
It's used only during initial block group reading to map physical address of super block to a list of logical ones. Make it private to block-group.c, add proper kernel doc and ensure it's exported only for tests. Signed-off-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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- 20 1月, 2020 2 次提交
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由 David Sterba 提交于
This is a leftover from recently removed bio scheduling framework. Fixes: ba8a9d07 ("Btrfs: delete the entire async bio submission framework") Reviewed-by: NAnand Jain <anand.jain@oracle.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Anand Jain 提交于
The struct member btrfs_device::device_dir_kobj holds the kobj of the sysfs directory /sys/fs/btrfs/UUID/devices, so rename it from device_dir_kobj to devices_kobj. No functional changes. Signed-off-by: NAnand Jain <anand.jain@oracle.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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- 19 11月, 2019 5 次提交
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由 Johannes Thumshirn 提交于
struct btrfs_fs_devices::rotating currently is declared as an integer variable but only used as a boolean. Change the variable definition to bool and update to code touching it to set 'true' and 'false'. Reviewed-by: NQu Wenruo <wqu@suse.com> Reviewed-by: NAnand Jain <anand.jain@oracle.com> Signed-off-by: NJohannes Thumshirn <jthumshirn@suse.de> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Johannes Thumshirn 提交于
struct btrfs_fs_devices::seeding currently is declared as an integer variable but only used as a boolean. Change the variable definition to bool and update to code touching it to set 'true' and 'false'. Reviewed-by: NQu Wenruo <wqu@suse.com> Reviewed-by: NAnand Jain <anand.jain@oracle.com> Signed-off-by: NJohannes Thumshirn <jthumshirn@suse.de> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 David Sterba 提交于
Add new block group profile to store 4 copies in a simliar way that current RAID1 does. The profile attributes and constraints are defined in the raid table and used by the same code that already handles the 2- and 3-copy RAID1. The minimum number of devices is 4, the maximum number of devices/chunks that can be lost/damaged is 3. There is no comparable traditional RAID level, the profile is added for future needs to accompany triple-parity and beyond. Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 David Sterba 提交于
Add new block group profile to store 3 copies in a simliar way that current RAID1 does. The profile attributes and constraints are defined in the raid table and used by the same code that already handles the 2-copy RAID1. The minimum number of devices is 3, the maximum number of devices/chunks that can be lost/damaged is 2. Like RAID6 but with 33% space utilization. Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Qu Wenruo 提交于
The last user of btrfs_bio::flags was removed in commit 326e1dbb ("block: remove management of bi_remaining when restoring original bi_end_io"), remove it. (Tagged for stable as the structure is heavily used and space savings are desirable.) CC: stable@vger.kernel.org # 4.4+ Signed-off-by: NQu Wenruo <wqu@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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- 18 11月, 2019 3 次提交
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由 Chris Mason 提交于
Now that we're not using btrfs_schedule_bio() anymore, delete all the code that supported it. Reviewed-by: NJosef Bacik <josef@toxicpanda.com> Reviewed-by: NNikolay Borisov <nborisov@suse.com> Signed-off-by: NChris Mason <clm@fb.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Chris Mason 提交于
btrfs_schedule_bio() hands IO off to a helper thread to do the actual submit_bio() call. This has been used to make sure async crc and compression helpers don't get stuck on IO submission. To maintain good performance, over time the IO submission threads duplicated some IO scheduler characteristics such as high and low priority IOs and they also made some ugly assumptions about request allocation batch sizes. All of this cost at least one extra context switch during IO submission, and doesn't fit well with the modern blkmq IO stack. So, this commit stops using btrfs_schedule_bio(). We may need to adjust the number of async helper threads for crcs and compression, but long term it's a better path. Reviewed-by: NJosef Bacik <josef@toxicpanda.com> Reviewed-by: NNikolay Borisov <nborisov@suse.com> Signed-off-by: NChris Mason <clm@fb.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 David Sterba 提交于
For some reason the attribute is called __attribute_const__ and not __const, marks functions that have no observable effects on program state, IOW not reading pointers, just the arguments and calculating a value. Allows the compiler to do some optimizations, based on -Wsuggest-attribute=const . The effects are rather small, though, about 60 bytes decrese of btrfs.ko. Reviewed-by: NNikolay Borisov <nborisov@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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- 09 9月, 2019 3 次提交
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由 Anand Jain 提交于
btrfs_dev_stat_reset() is an overdo in terms of wrapping. So this patch open codes btrfs_dev_stat_reset(). Signed-off-by: NAnand Jain <anand.jain@oracle.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 David Sterba 提交于
The status of flush bio is tracked as a status bit, changed in commit 1c3063b6 ("btrfs: cleanup device states define BTRFS_DEV_STATE_FLUSH_SENT"), the flush_bio_sent was forgotten. Reviewed-by: NAnand Jain <anand.jain@oracle.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Qu Wenruo 提交于
This function is only used locally in find_free_dev_extent(), no external callers. So unexport it. Reviewed-by: NJohannes Thumshirn <jthumshirn@suse.de> Signed-off-by: NQu Wenruo <wqu@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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- 02 7月, 2019 2 次提交
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由 Nikolay Borisov 提交于
Presently btrfs_map_block is used not only to do everything necessary to map a bio to the underlying allocation profile but it's also used to identify how much data could be written based on btrfs' stripe logic without actually submitting anything. This is achieved by passing NULL for 'bbio_ret' parameter. This patch refactors all callers that require just the mapping length by switching them to using btrfs_io_geometry instead of calling btrfs_map_block with a special NULL value for 'bbio_ret'. No functional change. Signed-off-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
Add a structure that holds various parameters for IO calculations and a helper that fills the values. This will help further refactoring and reduction of functions that in some way open-coded the calculations. Signed-off-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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- 01 7月, 2019 4 次提交
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由 Nikolay Borisov 提交于
Signed-off-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 David Sterba 提交于
The helper lacks the btrfs_ prefix and the parameter is the raw blockgroup type, so none of the callers has to do the flags -> index conversion. Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 David Sterba 提交于
The raid_attr table is now 7 * 56 = 392 bytes long, consisting of just small numbers so we don't have to use ints. New size is 7 * 32 = 224, saving 3 cachelines. Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 David Sterba 提交于
fs_info::mapping_tree is the physical<->logical mapping tree and uses the same underlying structure as extents, but is embedded to another structure. There are no other members and this indirection is useless. No functional change. Signed-off-by: NDavid Sterba <dsterba@suse.com>
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- 30 4月, 2019 7 次提交
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由 David Sterba 提交于
We can read fs_info from the device and can drop it from the parameters. Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 David Sterba 提交于
We can read fs_info from the transaction and can drop it from the parameters. Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
Now that these functions no longer require a handle to transaction to inspect pending/pinned chunks the argument can be removed. At the same time also remove any surrounding code which acquired the handle. Signed-off-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Jeff Mahoney 提交于
The pending chunks list contains chunks that are allocated in the current transaction but haven't been created yet. The pinned chunks list contains chunks that are being released in the current transaction. Both describe chunks that are not reflected on disk as in use but are unavailable just the same. The pending chunks list is anchored by the transaction handle, which means that we need to hold a reference to a transaction when working with the list. The way we use them is by iterating over both lists to perform comparisons on the stripes they describe for each device. This is backwards and requires that we keep a transaction handle open while we're trimming. This patchset adds an extent_io_tree to btrfs_device that maintains the allocation state of the device. Extents are set dirty when chunks are first allocated -- when the extent maps are added to the mapping tree. They're cleared when last removed -- when the extent maps are removed from the mapping tree. This matches the lifespan of the pending and pinned chunks list and allows us to do trims on unallocated space safely without pinning the transaction for what may be a lengthy operation. We can also use this io tree to mark which chunks have already been trimmed so we don't repeat the operation. Signed-off-by: NJeff Mahoney <jeffm@suse.com> Signed-off-by: NNikolay Borisov <nborisov@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
btrfs_device structs are freed from RCU context since device iteration is protected by RCU. Currently this is achieved by using call_rcu since no blocking functions are called within btrfs_free_device. Future refactoring of pending/pinned chunks will require calling sleeping functions. This patch is in preparation for these changes by simply switching from RCU callbacks to explicit calls of synchronize_rcu and calling btrfs_free_device directly. This is functionally equivalent, making sure that there are no readers at that time. Signed-off-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
We currently overload the pending_chunks list to handle updating btrfs_device->commit_bytes used. We don't actually care about the extent mapping or even the device mapping for the chunk - we just need the device, and we can end up processing it multiple times. The fs_devices->resized_list does more or less the same thing, but with the disk size. They are called consecutively during commit and have more or less the same purpose. We can combine the two lists into a single list that attaches to the transaction and contains a list of devices that need updating. Since we always add the device to a list when we change bytes_used or disk_total_size, there's no harm in copying both values at once. Signed-off-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Qu Wenruo 提交于
[BUG] For fuzzed image whose DEV_ITEM has invalid total_bytes as 0, then kernel will just panic: BUG: unable to handle kernel NULL pointer dereference at 0000000000000098 #PF error: [normal kernel read fault] PGD 800000022b2bd067 P4D 800000022b2bd067 PUD 22b2bc067 PMD 0 Oops: 0000 [#1] SMP PTI CPU: 0 PID: 1106 Comm: mount Not tainted 5.0.0-rc8+ #9 RIP: 0010:btrfs_verify_dev_extents+0x2a5/0x5a0 Call Trace: open_ctree+0x160d/0x2149 btrfs_mount_root+0x5b2/0x680 [CAUSE] If device extent verification finds a deivce with 0 total_bytes, then it assumes it's a seed dummy, then search for seed devices. But in this case, there is no seed device at all, causing NULL pointer. [FIX] Since this is caused by fuzzed image, let's go the tree-check way, just add a new verification for device item. Reported-by: NYoon Jungyeon <jungyeon@gatech.edu> Link: https://bugzilla.kernel.org/show_bug.cgi?id=202691Reviewed-by: NNikolay Borisov <nborisov@suse.com> Signed-off-by: NQu Wenruo <wqu@suse.com> Reviewed-by: NJohannes Thumshirn <jthumshirn@suse.de> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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- 09 4月, 2019 1 次提交
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由 Gustavo A. R. Silva 提交于
In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. This patch fixes the following warnings: fs/affs/affs.h:124:38: warning: this statement may fall through [-Wimplicit-fallthrough=] fs/configfs/dir.c:1692:11: warning: this statement may fall through [-Wimplicit-fallthrough=] fs/configfs/dir.c:1694:7: warning: this statement may fall through [-Wimplicit-fallthrough=] fs/ceph/file.c:249:3: warning: this statement may fall through [-Wimplicit-fallthrough=] fs/ext4/hash.c:233:15: warning: this statement may fall through [-Wimplicit-fallthrough=] fs/ext4/hash.c:246:15: warning: this statement may fall through [-Wimplicit-fallthrough=] fs/ext2/inode.c:1237:7: warning: this statement may fall through [-Wimplicit-fallthrough=] fs/ext2/inode.c:1244:7: warning: this statement may fall through [-Wimplicit-fallthrough=] fs/ext4/indirect.c:1182:6: warning: this statement may fall through [-Wimplicit-fallthrough=] fs/ext4/indirect.c:1188:6: warning: this statement may fall through [-Wimplicit-fallthrough=] fs/ext4/indirect.c:1432:6: warning: this statement may fall through [-Wimplicit-fallthrough=] fs/ext4/indirect.c:1440:6: warning: this statement may fall through [-Wimplicit-fallthrough=] fs/f2fs/node.c:618:8: warning: this statement may fall through [-Wimplicit-fallthrough=] fs/f2fs/node.c:620:8: warning: this statement may fall through [-Wimplicit-fallthrough=] fs/btrfs/ref-verify.c:522:15: warning: this statement may fall through [-Wimplicit-fallthrough=] fs/gfs2/bmap.c:711:7: warning: this statement may fall through [-Wimplicit-fallthrough=] fs/gfs2/bmap.c:722:7: warning: this statement may fall through [-Wimplicit-fallthrough=] fs/jffs2/fs.c:339:6: warning: this statement may fall through [-Wimplicit-fallthrough=] fs/nfsd/nfs4proc.c:429:12: warning: this statement may fall through [-Wimplicit-fallthrough=] fs/ufs/util.h:62:6: warning: this statement may fall through [-Wimplicit-fallthrough=] fs/ufs/util.h:43:6: warning: this statement may fall through [-Wimplicit-fallthrough=] fs/fcntl.c:770:7: warning: this statement may fall through [-Wimplicit-fallthrough=] fs/seq_file.c:319:10: warning: this statement may fall through [-Wimplicit-fallthrough=] fs/libfs.c:148:11: warning: this statement may fall through [-Wimplicit-fallthrough=] fs/libfs.c:150:7: warning: this statement may fall through [-Wimplicit-fallthrough=] fs/signalfd.c:178:7: warning: this statement may fall through [-Wimplicit-fallthrough=] fs/locks.c:1473:16: warning: this statement may fall through [-Wimplicit-fallthrough=] Warning level 3 was used: -Wimplicit-fallthrough=3 This patch is part of the ongoing efforts to enabling -Wimplicit-fallthrough. Reviewed-by: NKees Cook <keescook@chromium.org> Signed-off-by: NGustavo A. R. Silva <gustavo@embeddedor.com>
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- 25 2月, 2019 3 次提交
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由 Anand Jain 提交于
Support for a new command that can be used eg. as a command $ btrfs device scan --forget [dev]' (the final name may change though) to undo the effects of 'btrfs device scan [dev]'. For this purpose this patch proposes to use ioctl #5 as it was empty and is next to the SCAN ioctl. The new ioctl BTRFS_IOC_FORGET_DEV works only on the control device (/dev/btrfs-control) to unregister one or all devices, devices that are not mounted. The argument is struct btrfs_ioctl_vol_args, ::name specifies the device path. To unregister all device, the path is an empty string. Again, the devices are removed only if they aren't part of a mounte filesystem. This new ioctl provides: - release of unwanted btrfs_fs_devices and btrfs_devices structures from memory if the device is not going to be mounted - ability to mount filesystem in degraded mode, when one devices is corrupted like in split brain raid1 - running test cases which would require reloading the kernel module but this is not possible eg. due to mounted filesystem or built-in Signed-off-by: NAnand Jain <anand.jain@oracle.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> [ update changelog ] Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Anand Jain 提交于
Both btrfs_find_device() and find_device() does the same thing except that the latter does not take the seed device onto account in the device scanning context. We can merge them. Signed-off-by: NAnand Jain <anand.jain@oracle.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Anand Jain 提交于
btrfs_find_device() accepts fs_info as an argument and retrieves fs_devices from fs_info. Instead use fs_devices, so that this function can be used in non-mount (during device scanning) context as well. Signed-off-by: NAnand Jain <anand.jain@oracle.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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- 17 12月, 2018 8 次提交
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由 Johannes Thumshirn 提交于
The btrfs_bio_end_io_t typedef was introduced with commit a1d3c478 ("btrfs: btrfs_multi_bio replaced with btrfs_bio") but never used anywhere. This commit also introduced a forward declaration of 'struct btrfs_bio' which is only needed for btrfs_bio_end_io_t. Remove both as they're not needed anywhere. Reviewed-by: NNikolay Borisov <nborisov@suse.com> Signed-off-by: NJohannes Thumshirn <jthumshirn@suse.de> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 David Sterba 提交于
The end_io callback implemented as btrfs_io_bio_endio_readpage only calls kfree. Also the callback is set only in case the csum buffer is allocated and not pointing to the inline buffer. We can use that information to drop the indirection and call a helper that will free the csums only in the right case. This shrinks struct btrfs_io_bio by 8 bytes. Reviewed-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NJohannes Thumshirn <jthumshirn@suse.de> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 David Sterba 提交于
The io_bio tracks checksums and has an inline buffer or an allocated one. And there's a third member that points to the right one, but we don't need to use an extra pointer for that. Let btrfs_io_bio::csum point to the right buffer and check that the inline buffer is not accidentally freed. This shrinks struct btrfs_io_bio by 8 bytes. Reviewed-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NJohannes Thumshirn <jthumshirn@suse.de> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Anand Jain 提交于
Factor out helper that describes block group flags from describe_relocation. The result will not be longer than the given size. Signed-off-by: NAnand Jain <anand.jain@oracle.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> [ add comments ] Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
In order to gracefully handle split-brain scenario during fsid change (which are very unlikely, yet possible), two more pieces of information will be necessary: 1. The highest generation number among all devices registered to a particular btrfs_fs_devices 2. A boolean flag whether a given btrfs_fs_devices was created by a device which had the FSID_CHANGING_V2 flag set. This is a preparatory patch and just introduces the variables as well as code which sets them, their actual use is going to happen in a later patch. Signed-off-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
This field is going to be used when the user wants to change the UUID of the filesystem without having to rewrite all metadata blocks. This field adds another level of indirection such that when the FSID is changed what really happens is the current UUID (the one with which the fs was created) is copied to the 'metadata_uuid' field in the superblock as well as a new incompat flag is set METADATA_UUID. When the kernel detects this flag is set it knows that the superblock in fact has 2 UUIDs: 1. Is the UUID which is user-visible, currently known as FSID. 2. Metadata UUID - this is the UUID which is stamped into all on-disk datastructures belonging to this file system. When the new incompat flag is present device scanning checks whether both fsid/metadata_uuid of the scanned device match any of the registered filesystems. When the flag is not set then both UUIDs are equal and only the FSID is retained on disk, metadata_uuid is set only in-memory during mount. Additionally a new metadata_uuid field is also added to the fs_info struct. It's initialised either with the FSID in case METADATA_UUID incompat flag is not set or with the metdata_uuid of the superblock otherwise. This commit introduces the new fields as well as the new incompat flag and switches all users of the fsid to the new logic. Signed-off-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> [ minor updates in comments ] Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Hans van Kranenburg 提交于
Instead of hardcoding exceptions for RAID5 and RAID6 in the code, use an nparity field in raid_attr. Signed-off-by: NHans van Kranenburg <hans.van.kranenburg@mendix.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Omar Sandoval 提交于
The Btrfs swap code is going to need it, so give it a btrfs_ prefix and make it non-static. Reviewed-by: NNikolay Borisov <nborisov@suse.com> Signed-off-by: NOmar Sandoval <osandov@fb.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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