AcoSail/kernel_optimize_test
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77cef2ec54
kernel_optimize_test/fs/btrfs
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Josef Bacik 77cef2ec54 Btrfs: allow partial ordered extent completion 
We currently have this problem where you can truncate pages that have not yet
been written for an ordered extent.  We do this because the truncate will be
coming behind to clean us up anyway so what's the harm right?  Well if truncate
fails for whatever reason we leave an orphan item around for the file to be
cleaned up later.  But if the user goes and truncates up the file and tries to
read from the area that had been discarded previously they will get a csum error
because we never actually wrote that data out.

This patch fixes this by allowing us to either discard the ordered extent
completely, by which I mean we just free up the space we had allocated and not
add the file extent, or adjust the length of the file extent we write.  We do
this by setting the length we truncated down to in the ordered extent, and then
we set the file extent length and ram bytes to this length.  The total disk
space stays unchanged since we may be compressed and we can't just chop off the
disk space, but at least this way the file extent only points to the valid data.
Then when the file extent is free'd the extent and csums will be freed normally.

This patch is needed for the next series which will give us more graceful
recovery of failed truncates.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-09-01 08:16:34 -04:00
..
tests Btrfs: separate out tests into their own directory 2013-09-01 08:15:38 -04:00
acl.c Btrfs: skip adding an acl attribute if we don't have to 2012-12-16 20:46:15 -05:00
async-thread.c Btrfs: call the ordered free operation without any locks held 2012-07-25 16:15:07 -04:00
async-thread.h
backref.c Btrfs: allocate prelim_ref with a slab allocater 2013-09-01 08:16:27 -04:00
backref.h Btrfs: allocate prelim_ref with a slab allocater 2013-09-01 08:16:27 -04:00
btrfs_inode.h Btrfs: don't cache the csum value into the extent state tree 2013-09-01 08:04:33 -04:00
check-integrity.c Btrfs: Use %z to format size_t 2013-09-01 08:16:19 -04:00
check-integrity.h
compat.h
compression.c Btrfs: Remove superfluous casts from u64 to unsigned long long 2013-09-01 08:16:08 -04:00
compression.h btrfs: make static code static & remove dead code 2013-05-06 15:55:23 -04:00
ctree.c Btrfs: Make btrfs_header_chunk_tree_uuid() return unsigned long 2013-09-01 08:16:16 -04:00
ctree.h Btrfs: add support for asserts 2013-09-01 08:16:32 -04:00
delayed-inode.c Btrfs: fix printing of non NULL terminated string 2013-09-01 08:16:20 -04:00
delayed-inode.h [readdir] convert btrfs 2013-06-29 12:57:00 +04:00
delayed-ref.c Btrfs: get rid of sparse warnings 2013-09-01 08:15:50 -04:00
delayed-ref.h Btrfs: handle running extent ops with skinny metadata 2013-05-17 21:40:15 -04:00
dev-replace.c Btrfs: Make BTRFS_DEV_REPLACE_DEVID an unsigned long long constant 2013-09-01 08:16:09 -04:00
dev-replace.h Btrfs: add new sources for device replace code 2012-12-12 17:15:41 -05:00
dir-item.c btrfs: make static code static & remove dead code 2013-05-06 15:55:23 -04:00
disk-io.c Btrfs: fix for patch "cleanup: don't check the same thing twice" 2013-09-01 08:16:29 -04:00
disk-io.h Btrfs: introduce grab/put functions for the root of the fs/file tree 2013-06-14 11:29:38 -04:00
export.c Btrfs: cleanup: don't check the same thing twice 2013-06-14 11:29:30 -04:00
export.h
extent_io.c Btrfs: PAGE_CACHE_SIZE is already unsigned long 2013-09-01 08:16:17 -04:00
extent_io.h btrfs: mark some local function as 'static' 2013-09-01 08:15:51 -04:00
extent_map.c btrfs: make static code static & remove dead code 2013-05-06 15:55:23 -04:00
extent_map.h Btrfs: fix bad extent logging 2013-05-06 15:54:34 -04:00
extent-tree.c Btrfs: remove ourselves from the cluster list under lock 2013-09-01 08:16:23 -04:00
file-item.c Btrfs: Remove superfluous casts from u64 to unsigned long long 2013-09-01 08:16:08 -04:00
file.c Btrf: cleanup: don't check for root_refs == 0 twice 2013-09-01 08:16:29 -04:00
free-space-cache.c Btrfs: convert all bug_ons in free-space-cache.c 2013-09-01 08:16:33 -04:00
free-space-cache.h Btrfs: separate out tests into their own directory 2013-09-01 08:15:38 -04:00
hash.h btrfs: extended inode refs 2012-10-09 09:14:45 -04:00
inode-item.c btrfs: make static code static & remove dead code 2013-05-06 15:55:23 -04:00
inode-map.c Btrfs: don't use global block reservation for inode cache truncation 2013-05-17 21:40:22 -04:00
inode-map.h
inode.c Btrfs: allow partial ordered extent completion 2013-09-01 08:16:34 -04:00
ioctl.c Btrfs: fix race conditions in BTRFS_IOC_FS_INFO ioctl 2013-09-01 08:16:25 -04:00
Kconfig Btrfs: add support for asserts 2013-09-01 08:16:32 -04:00
locking.c btrfs: make static code static & remove dead code 2013-05-06 15:55:23 -04:00
locking.h Btrfs: remove btrfs_try_spin_lock 2013-03-14 14:57:10 -04:00
lzo.c Btrfs: return -1 when lzo compression makes data bigger 2013-09-01 07:57:19 -04:00
Makefile Btrfs: introduce a tree for items that map UUIDs to something 2013-09-01 08:15:52 -04:00
math.h Btrfs: cleanup duplicated division functions 2012-12-11 13:31:30 -05:00
ordered-data.c Btrfs: allow partial ordered extent completion 2013-09-01 08:16:34 -04:00
ordered-data.h Btrfs: allow partial ordered extent completion 2013-09-01 08:16:34 -04:00
orphan.c
print-tree.c Btrfs: Remove superfluous casts from u64 to unsigned long long 2013-09-01 08:16:08 -04:00
print-tree.h btrfs: make static code static & remove dead code 2013-05-06 15:55:23 -04:00
qgroup.c Btrfs: Remove superfluous casts from u64 to unsigned long long 2013-09-01 08:16:08 -04:00
raid56.c Btrfs, raid56: fix memory leak when allocating pages for p/q stripes failed 2013-09-01 08:04:27 -04:00
raid56.h Btrfs: RAID5 and RAID6 2013-02-01 14:24:23 -05:00
rcu-string.h Btrfs: use rcu to protect device->name 2012-06-14 21:29:16 -04:00
reada.c Btrfs: fix reada debug code compilation 2013-05-06 15:54:55 -04:00
relocation.c Btrf: cleanup: don't check for root_refs == 0 twice 2013-09-01 08:16:29 -04:00
root-tree.c Btrfs: Remove superfluous casts from u64 to unsigned long long 2013-09-01 08:16:08 -04:00
scrub.c Btrf: cleanup: don't check for root_refs == 0 twice 2013-09-01 08:16:29 -04:00
send.c Btrfs: fix send to deal with sparse files properly 2013-09-01 08:16:21 -04:00
send.h btrfs: make static code static & remove dead code 2013-05-06 15:55:23 -04:00
struct-funcs.c Btrfs: rewrite BTRFS_SETGET_FUNCS 2012-07-23 16:28:06 -04:00
super.c Btrfs: allocate prelim_ref with a slab allocater 2013-09-01 08:16:27 -04:00
sysfs.c btrfs: fixup/remove module.h usage as required 2013-03-01 15:01:01 -05:00
transaction.c Btrfs: Remove superfluous casts from u64 to unsigned long long 2013-09-01 08:16:08 -04:00
transaction.h btrfs: mark some local function as 'static' 2013-09-01 08:15:51 -04:00
tree-defrag.c btrfs: remove cache only arguments from defrag path 2013-02-20 12:59:36 -05:00
tree-log.c Btrfs: don't ignore errors from btrfs_run_delayed_items 2013-09-01 08:04:54 -04:00
tree-log.h btrfs: make static code static & remove dead code 2013-05-06 15:55:23 -04:00
ulist.c Btrfs: fix crash regarding to ulist_add_merge 2013-07-02 11:50:59 -04:00
ulist.h Btrfs: add a rb_tree to improve performance of ulist search 2013-05-06 15:54:44 -04:00
uuid-tree.c Btrfs: check UUID tree during mount if required 2013-09-01 08:15:58 -04:00
volumes.c Btrfs: adjust the fs_devices->missing count on unmount 2013-09-01 08:16:31 -04:00
volumes.h Btrfs: add btrfs_alloc_device and switch to it 2013-09-01 08:16:04 -04:00
xattr.c btrfs: make static code static & remove dead code 2013-05-06 15:55:23 -04:00
xattr.h
zlib.c btrfs: fix message printing 2012-10-09 09:19:57 -04:00