- 26 Mar, 2018 40 commits
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Anand Jain authored
bio_add_page() can fail for logical reasons as from the bio_add_page() comments: /* * This will only fail if either bio->bi_vcnt == bio->bi_max_vecs or * it's a cloned bio. */ Here we have just allocated the bio, so both of those failures can't occur. So drop the check. We can also drop the error stats for write error. Signed-off-by:
Anand Jain <anand.jain@oracle.com> Reviewed-by:
David Sterba <dsterba@suse.com> Signed-off-by:
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Qu Wenruo authored
Enospc_debug makes extent allocator print more debug messages, however for chunk allocation, there is no debug message for enospc_debug at all. This patch will add message for the following parts of chunk allocator: 1) No rw device at all Quite rare, but at least output one message for this case. 2) Not enough space for some device This debug message is quite handy for unbalanced disks with stripe based profiles (RAID0/10/5/6). 3) Not enough free devices This debug message should tell us if current chunk allocator is working correctly under minimal device requirements. Although in most cases, we will hit other ENOSPC before we even hit a chunk allocator ENOSPC, but such debug info won't help. Signed-off-by:
Qu Wenruo <wqu@suse.com> Reviewed-by:
Nikolay Borisov <nborisov@suse.com> Signed-off-by:
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Anand Jain authored
Use ASSERT to report logical error in cow_file_range(), also move it a bit closer to when the num_bytes is derived. The extent start could be (u64)-1 in some cases, the assert should catch that we do not accidentally pass it to cow_file_range. Signed-off-by:
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Anand Jain authored
This patch deletes local variable disk_num_bytes as its value is same as num_bytes in the function cow_file_range(). Signed-off-by:
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Anand Jain authored
Commit [1] removed the need to use btrfs_async_submit_limit(), so delete it. [1] commit 736cd52e Btrfs: remove nr_async_submits and async_submit_draining Signed-off-by:
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Yang Shi authored
Preempt counter APIs have been split out, currently, hardirq.h just includes irq_enter/exit APIs which are not used by btrfs at all. So, remove the unused hardirq.h. Signed-off-by:
Yang Shi <yang.s@alibaba-inc.com> Signed-off-by:
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Nikolay Borisov authored
Currently when enospc_debug mount option is turned on we do not print any debug info in case metadata reservation failures happen. Fix this by adding the necessary hook in reserve_metadata_bytes. Signed-off-by:
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Nikolay Borisov authored
The reason why io_bgs can be modified without holding any lock is non-obvious. Document it and reference that documentation from the respective call sites. Signed-off-by:
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Nikolay Borisov authored
list_first_entry is essentially a wrapper over cotnainer_of. The latter can never return null even if it's working on inconsistent list since it will either crash or return some offset in the wrong struct. Additionally, for the dirty_bgs list the iteration is done under dirty_bgs_lock which ensures consistency of the list. Signed-off-by:
Liu Bo <bo.li.liu@oracle.com> Signed-off-by:
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Anand Jain authored
For debugging or administration purposes, we would want to know if and when the user cancels the replace, to complement the existing messages when dev-replace starts or finishes. Signed-off-by:
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Anand Jain authored
The replace target device can be missing when mounted with -o degraded, but we wont allocate a missing btrfs_device to it. So check the device before accessing. BUG: unable to handle kernel NULL pointer dereference at 00000000000000b0 IP: btrfs_destroy_dev_replace_tgtdev+0x43/0xf0 [btrfs] Call Trace: btrfs_dev_replace_cancel+0x15f/0x180 [btrfs] btrfs_ioctl+0x2216/0x2590 [btrfs] do_vfs_ioctl+0x625/0x650 SyS_ioctl+0x4e/0x80 do_syscall_64+0x5d/0x160 entry_SYSCALL64_slow_path+0x25/0x25 This patch has been moved in front of patch "btrfs: log, when replace, is canceled by the user" that could reproduce the crash if the system reboots inside btrfs_dev_replace_start before the btrfs_dev_replace_finishing call. $ mkfs /dev/sda $ mount /dev/sda mnt $ btrfs replace start /dev/sda /dev/sdb <insert reboot> $ mount po degraded /dev/sdb mnt <crash> Signed-off-by:
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Anand Jain authored
The options alloc_start and subvolrootid are deprecated, comment them in the tokens list. And leave them as it is. No functional changes. Signed-off-by:
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Anand Jain authored
As the commit mount option is unsigned so manage it as %u for token verifications, instead of %d. Signed-off-by:
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Anand Jain authored
As check_int_print_mask mount option is unsigned so manage it as %u for token verifications, instead of %d. Signed-off-by:
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Anand Jain authored
As metadata_ratio mount option is unsinged so manage it as %u for token verifications, instead of %d. Signed-off-by:
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Anand Jain authored
The mount option thread_pool is always unsigned. Manage it that way all around. Signed-off-by:
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Anand Jain authored
extent_buffer_uptodate() is a trivial wrapper around test_bit() and nothing else. So make it static and inline, save on code space and call indirection. Before: text data bss dec hex filename 1131257 82898 18992 1233147 12d0fb fs/btrfs/btrfs.ko After: text data bss dec hex filename 1131090 82898 18992 1232980 12d054 fs/btrfs/btrfs.ko Signed-off-by:
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Nikolay Borisov authored
We already pass btrfs_trans_handle which contains a reference to the fs_info so use that. No functional changes. Signed-off-by:
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Nikolay Borisov authored
We already pass the btrfs_transaction which references fs_info so no need to pass the later as an argument. Also use the opportunity to shorten transaction->trans. No functional changes. Signed-off-by:
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Nikolay Borisov authored
We already pass the trans handle which has a reference to fs_info to create_pending_snapshot so we can refer to it directly. Doing this obviates the need to pass the fs_info to create_pending_snapshots as well. No functional changes. Signed-off-by:
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Nikolay Borisov authored
We already have the fs_info from the passed transaction so use it directly. No functional changes. Signed-off-by:
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Nikolay Borisov authored
The only thing the passed root is used for is: 1. get a reference to the fs_info and to 2. call trace_btrfs_transaction_commit. We can achieve 1) by simply referring to the fs_info from passed trans object. As far as 2) is concerned cleanup_transaction is called from only one place and the 'root' argument passed is the one from the trans handle. No functional changes. Signed-off-by:
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Nikolay Borisov authored
We already pass a transaction handle which refrences the fs_info so we can grab it from there. No functional changes. Signed-off-by:
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Nikolay Borisov authored
We already pass the transaction handle which has a reference to the fs_info. No functional changes. Signed-off-by:
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Nikolay Borisov authored
We already pass the transaction which has a reference to the fs_info, so use that. No functional changes. Signed-off-by:
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Nikolay Borisov authored
We already pass the transaction handle, which contains a refrence to the fs_info so grab it from there. No functional changes. Signed-off-by:
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Nikolay Borisov authored
It can be referenced from the passed transaction so no point in passing it as a function argument. No functional changes. Signed-off-by:
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Nikolay Borisov authored
It can be referenced from the passed transaciton so no point in passing it as function argument. No functional changes. Signed-off-by:
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Nikolay Borisov authored
All current callers of this function just get a reference to the trans->fs_info member and pass it as the second argument. Collapse this into the function itself. No functional changes. Signed-off-by:
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Nikolay Borisov authored
btrfs_write_and_wait_transaction is essentially a wrapper of btrfs_write_and_wait_marked_extents with the addition of calling clear_btree_io_tree. Having the code split doesn't really bring any benefit. Open code the later into the former and add proper documentation header. Signed-off-by:
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Nikolay Borisov authored
This function is only ever used in __btrfs_end_transaction and btrfs_commit_transaction so there is no need to export it via header. Let's move it closer to where it's used, make it static and remove it from the header. No functional changes. Signed-off-by:
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Anand Jain authored
btrfs_init_dev_replace_tgtdev_for_resume() initializes replace target device in a few simple steps, so do it at the parent function. Moreover, there isn't any other caller so just open code it. Signed-off-by:
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Anand Jain authored
Current u64 return from btrfs_dev_replace_cancel() was probably done to match the btrfs_ioctl_dev_replace_args::result. However as our actual return value fits in int, and it further gets typecast to u64, so just return int. Signed-off-by:
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Anand Jain authored
Remove __ which is for the special functions. Signed-off-by:
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Anand Jain authored
btrfs_dev_replace_cancel() calls __btrfs_dev_replace_cancel() for the actual cancel so just open code it. Signed-off-by:
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Nikolay Borisov authored
Currently the function uses a hardcoded value for the checksum size of a sector. This is fine, given that we currently support only a single algorithm, whose checksum is 4 bytes == sizeof(u32). Despite not having other algorithms, btrfs' design supports using a different algorithm whith different space requirements. To future-proof the code query the size of the currently used algorithm from the in-memory copy of the super block. No functional changes. Signed-off-by:
Su Yue <suy.fnst@cn.fujitsu.com> Signed-off-by:
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Colin Ian King authored
Add a missing void parameter to function btrfs_test_extent_map, fixes sparse warning: warning: non-ANSI function declaration of function 'btrfs_test_extent_map' Signed-off-by:
Colin Ian King <colin.king@canonical.com> Signed-off-by:
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Colin Ian King authored
The check for a non-zero ret is redundant as the goto will jump to the very next statement anyway. Remove this extraneous code. Detected by CoverityScan, CID#1463784 ("Identical code for different branches") Signed-off-by: -
Nikolay Borisov authored
Commit 0e8c36a9 ("Btrfs: fix lots of orphan inodes when the space is not enough") changed the way transaction reservation is made in btrfs_evict_node and as a result this function became unused. This has been the status quo for 5 years in which time no one noticed, so I'd say it's safe to assume it's unlikely it will ever be used again. Historical note: there were more attempts to remove the function, the reasoning was missing and only based on some static analysis tool reports. Other reason for rejection was that there seemed to be connection to BTRFS_RESERVE_FLUSH_LIMIT and that would need to be removeed to. This was not correct so removing the function is all we can do. Signed-off-by:
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Howard McLauchlan authored
Presently, failing a primary super block write but succeeding in at least one super block write in general will appear to users as if nothing important went wrong. However, upon unmounting and re-mounting, the file system will be in a rolled back state. This was discovered with a BCC program that uses bpf_override_return() to fail super block writes. This patch outputs an error clarifying that the primary super block write has failed, so users can expect potentially erroneous behaviour. It also forces wait_dev_supers() to return an error to its caller if the primary super block write fails. Signed-off-by:
Howard McLauchlan <hmclauchlan@fb.com> Reviewed-by:
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