- 15 Mar, 2010 4 commits
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Josef Bacik authored
This work is in preperation for being able to set a different root as the default mounting root. There is currently a problem with how we mount subvolumes. We cannot currently mount a subvolume of a subvolume, you can only mount subvolumes/snapshots of the default subvolume. So say you take a snapshot of the default subvolume and call it snap1, and then take a snapshot of snap1 and call it snap2, so now you have / /snap1 /snap1/snap2 as your available volumes. Currently you can only mount / and /snap1, you cannot mount /snap1/snap2. To fix this problem instead of passing subvolid=<name> you must pass in subvolid=<treeid>, where <treeid> is the tree id that gets spit out via the subvolume listing you get from the subvolume listing patches (btrfs filesystem list). This allows us to mount /, /snap1 and /snap1/snap2 as the root volume. In addition to the above, we also now read the default dir item in the tree root to get the root key that it points to. For now this just points at what has always been the default subvolme, but later on I plan to change it to point at whatever root you want to be the new default root, so you can just set the default mount and not have to mount with -o subvolid=<treeid>. I tested this out with the above scenario and it worked perfectly. Thanks, mount -o subvol operates inside the selected subvolid. For example: mount -o subvol=snap1,subvolid=256 /dev/xxx /mnt /mnt will have the snap1 directory for the subvolume with id 256. mount -o subvol=snap /dev/xxx /mnt /mnt will be the snap directory of whatever the default subvolume is. Signed-off-by:
Josef Bacik <josef@redhat.com> Signed-off-by:
Chris Mason <chris.mason@oracle.com>
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Josef Bacik authored
Our set/get functions for compat_ro_flags actually look at compat_flags. This will mess any attempt to use compat flags up. The fix is obvious. Thanks, Signed-off-by:
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Chris Mason authored
The search ioctl is a generic tool for doing btree searches from userland applications. The first user of the search ioctl is a subvolume listing feature, but we'll also use it to find new files in a subvolume. The search ioctl allows you to specify min and max keys to search for, along with min and max transid. It returns the items along with a header that includes the item key. Signed-off-by: -
TARUISI Hiroaki authored
This will be used by the inode lookup ioctl. Signed-off-by:
TARUISI Hiroaki <taruishi.hiroak@jp.fujitsu.com> Signed-off-by:
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- 08 Mar, 2010 2 commits
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Josef Bacik authored
We kstrdup the options string, but then strsep screws with the pointer, so when we kfree() it, we're not giving it the right pointer. Tested-by:
Andy Lutomirski <luto@mit.edu> Signed-off-by:
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Eric Paris authored
btrfs inialize rb trees in quite a number of places by settin rb_node = NULL; The problem with this is that 17d9ddc7 in the linux-next tree adds a new field to that struct which needs to be NULL for the new rbtree library code to work properly. This patch uses RB_ROOT as the intializer so all of the relevant fields will be NULL'd. Without the patch I get a panic. Signed-off-by:
Eric Paris <eparis@redhat.com> Acked-by:
Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by:
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- 12 Feb, 2010 1 commit
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Shaohua Li authored
My test do: fallocate a big file and do write. The file is 512M, but after file write is done btrfs-debug-tree shows: item 6 key (257 EXTENT_DATA 0) itemoff 3516 itemsize 53 extent data disk byte 1103101952 nr 536870912 extent data offset 0 nr 399634432 ram 536870912 extent compression 0 Looks like a regression introducted by 6c7d54ac, where we set wrong slot. Signed-off-by:Shaohua Li <shaohua.li@intel.com> Acked-by:
Yan Zheng <zheng.yan@oracle.com> Signed-off-by:
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- 04 Feb, 2010 6 commits
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Aneesh Kumar K.V authored
This version of the i_size fix for fallocate makes sure we only update the i_size when the current fallocate is really operating outside of i_size. Signed-off-by: -
Josef Bacik authored
When running the following fio job [torrent] filename=torrent-test rw=randwrite size=4g filesize=4g bs=4k ioengine=sync you would see long stalls where no work was being done. That is because we were doing all this extra work to read in the file extent outside of the transaction, however in the random io case this ends up hurting us because the file extents are not there to begin with. So axe this logic, since we end up reading in the file extent when we go to update it anyway. This took the fio job from 11 mb/s with several ~10 second stalls to 24 mb/s to a couple of 1-2 second stalls. Signed-off-by:
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Yan, Zheng authored
When dropping a empty tree, walk_down_tree() skips checking extent information for the tree root. This will triggers a BUG_ON in walk_up_proc(). Signed-off-by:
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Miao Xie authored
Mounting a bad filesystem caused a BUG_ON(). The following is steps to reproduce it. # mkfs.btrfs /dev/sda2 # mount /dev/sda2 /mnt # mkfs.btrfs /dev/sda1 /dev/sda2 (the program says that /dev/sda2 was mounted, and then exits. ) # umount /mnt # mount /dev/sda1 /mnt At the third step, mkfs.btrfs exited in the way of make filesystem. So the initialization of the filesystem didn't finish. So the filesystem was bad, and it caused BUG_ON() when mounting it. But BUG_ON() should be called by the wrong code, not user's operation, so I think it is a bug of btrfs. This patch fixes it. Signed-off-by:
Miao Xie <miaox@cn.fujitsu.com> Signed-off-by:
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Roel Kluin authored
It appears the error return should be negative Signed-off-by:
Roel Kluin <roel.kluin@gmail.com> Signed-off-by:
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Yan, Zheng authored
Increase extent buffer's reference count while holding the lock. Otherwise it can race with try_release_extent_buffer. Signed-off-by:
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- 28 Jan, 2010 8 commits
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Josef Bacik authored
If you have a disk failure in RAID1 and then add a new disk to the array, and then try to remove the missing volume, it will fail. The reason is the sanity check only looks at the total number of rw devices, which is just 2 because we have 2 good disks and 1 bad one. Instead check the total number of devices in the array to make sure we can actually remove the device. Tested this with a failed disk setup and with this test we can now run btrfs-vol -r missing /mount/point and it works fine. Signed-off-by:
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Josef Bacik authored
Hit this problem while testing RAID1 failure stuff. open_bdev_exclusive returns ERR_PTR(), not NULL. So change the return value properly. This is important if you accidently specify a device that doesn't exist when trying to add a new device to an array, you will panic the box dereferencing bdev. Signed-off-by:
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Josef Bacik authored
If a RAID setup has chunks that span multiple disks, and one of those disks has failed, btrfs_chunk_readonly will return 1 since one of the disks in that chunk's stripes is dead and therefore not writeable. So instead if we are in degraded mode, return 0 so we can go ahead and allocate stuff. Without this patch all of the block groups in a RAID1 setup will end up read-only, which will mean we can't add new disks to the array since we won't be able to make allocations. Signed-off-by:
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Josef Bacik authored
This patch revert's commit 6c090a11 Since it introduces this problem where we can run orphan cleanup on a volume that can have orphan entries re-added. Instead of my original fix, Yan Zheng pointed out that we can just revert my original fix and then run the orphan cleanup in open_ctree after we look up the fs_root. I have tested this with all the tests that gave me problems and this patch fixes both problems. Thanks, Signed-off-by:
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Yang Hongyang authored
In btrfs_init_acl() cloned acl is not released Signed-off-by:
Yang Hongyang <yanghy@cn.fujitsu.com> Signed-off-by:
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Aneesh Kumar K.V authored
commit f2bc9dd07e3424c4ec5f3949961fe053d47bc825 Author: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Date: Wed Jan 20 12:57:53 2010 +0530 Btrfs: Use correct values when updating inode i_size on fallocate Even though we allocate more, we should be updating inode i_size as per the arguments passed Signed-off-by:Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by:
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Miao Xie authored
This patch removes tree_search() in extent_map.c because it is not called by anything. Signed-off-by:
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Chris Mason authored
The default btrfs mount -o compress mode will quickly back off compressing a file if it notices that compression does not reduce the size of the data being written. This can save considerable CPU because all future writes to the file go through uncompressed. But some files are both very large and have mixed data stored in them. In that case, we want to add the ability to always try compressing data before writing it. This commit adds mount -o compress-force. A later commit will add a new inode flag that does the same thing. Signed-off-by:
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- 18 Jan, 2010 7 commits
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Josef Bacik authored
We can race with the unmount of an fs and the stopping of a kthread where we will free the block group before we're done using it. The reason for this is because we do not hold a reference on the block group while its caching, since the allocator drops its reference once it exits or moves on to the next block group. This patch fixes the problem by taking a reference to the block group before we start caching and dropping it when we're done to make sure all accesses to the block group are safe. Thanks, Signed-off-by:
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Chris Mason authored
It is legal for btrfs_set_acl to be sent a NULL acl. This makes sure we don't dereference it. A similar patch was sent by Johannes Hirte <johannes.hirte@fem.tu-ilmenau.de> Signed-off-by: -
Josef Bacik authored
Currently orphan cleanup only ever gets triggered if we cross subvolumes during a lookup, which means that if we just mount a plain jane fs that has orphans in it, they will never get cleaned up. This results in panic's like these http://www.kerneloops.org/oops.php?number=1109085 where adding an orphan entry results in -EEXIST being returned and we panic. In order to fix this, we check to see on lookup if our root has had the orphan cleanup done, and if not go ahead and do it. This is easily reproduceable by running this testcase #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <string.h> #include <unistd.h> #include <stdio.h> int main(int argc, char **argv) { char data[4096]; char newdata[4096]; int fd1, fd2; memset(data, 'a', 4096); memset(newdata, 'b', 4096); while (1) { int i; fd1 = creat("file1", 0666); if (fd1 < 0) break; for (i = 0; i < 512; i++) write(fd1, data, 4096); fsync(fd1); close(fd1); fd2 = creat("file2", 0666); if (fd2 < 0) break; ftruncate(fd2, 4096 * 512); for (i = 0; i < 512; i++) write(fd2, newdata, 4096); close(fd2); i = rename("file2", "file1"); unlink("file1"); } return 0; } and then pulling the power on the box, and then trying to run that test again when the box comes back up. I've tested this locally and it fixes the problem. Thanks to Tomas Carnecky for helping me track this down initially. Signed-off-by:
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Yan, Zheng authored
Fix bug reported by Johannes Hirte. The reason of that bug is btrfs_del_items is called after btrfs_duplicate_item and btrfs_del_items triggers tree balance. The fix is check that case and call btrfs_search_slot when needed. Signed-off-by:
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Jiri Slaby authored
Stanse found 2 memory leaks in relocate_block_group and __btrfs_map_block. cluster and multi are not freed/assigned on all paths. Fix that. Signed-off-by:
Jiri Slaby <jslaby@suse.cz> Cc: linux-btrfs@vger.kernel.org Signed-off-by:
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Yan, Zheng authored
Some callers of btrfs_ordered_update_i_size can now pass in a NULL for the ordered extent to update against. This makes sure we properly align the offset they pass in when deciding how much to bump the on disk i_size. Signed-off-by: -
Jan Engelhardt authored
parent 49313cdac7b34c9f7ecbb1780cfc648b1c082cd7 (v2.6.32-1-g49313cd) commit ff48c08e1c05c67e8348ab6f8a24de8034e0e34d Author: Jan Engelhardt <jengelh@medozas.de> Date: Wed Dec 9 22:57:36 2009 +0100 Btrfs: fix missing last-entry in readdir(3) When one does a 32-bit readdir(3), the last entry of a directory is missing. This is however not due to passing a large value to filldir, but it seems to have to do with glibc doing telldir or something quirky. In any case, this patch fixes it in practice. Signed-off-by:
Jan Engelhardt <jengelh@medozas.de> Signed-off-by:
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- 17 Dec, 2009 12 commits
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Chris Mason authored
The recent patch to make fallocate enospc friendly would send down a NULL trans handle to the allocator. This moves the transaction start to properly fix things. Signed-off-by: -
Josef Bacik authored
This patch makes us a bit less zealous about making sure we have enough free metadata space by pearing down the size of new metadata chunks to 256mb instead of 1gb. Also, we used to try an allocate metadata chunks when allocating data, but that sort of thing is done elsewhere now so we can just remove it. With my -ENOSPC test I used to have 3gb reserved for metadata out of 75gb, now I have 1.7gb. Thanks, Signed-off-by:
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Matthew Wilcox authored
Christoph's patch e244a0ae doesn't display the discard option in /proc/mounts, leading to some confusion for me. Here's the missing bit. Signed-off-by:
Matthew Wilcox <willy@linux.intel.com> Signed-off-by:
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TARUISI Hiroaki authored
I rebased Christian Parpart's patch to deny hard link across subvolumes. Original patch modifies also btrfs_rename, but I excluded it because we can move across subvolumes now and it make no problem. ----------------- Hard link across subvolumes should not allowed in Btrfs. btrfs_link checks root of 'to' directory is same as root of 'from' file. If not same, btrfs_link returns -EPERM. Signed-off-by:
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Sage Weil authored
We shouldn't silently ignore unrecognized options. Signed-off-by:
Sage Weil <sage@newdream.net> Signed-off-by:
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Yan, Zheng authored
If block group 0 is completely free, btrfs_read_block_groups will add extent [0, BTRFS_SUPER_INFO_OFFSET) to the free space cache. Signed-off-by:
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Yan, Zheng authored
The bytes_used field in root item was originally planned to trace the amount of used data and tree blocks. But it never worked right since we can't trace freeing of data accurately. This patch changes it to only trace the amount of tree blocks. Signed-off-by:
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Yan, Zheng authored
The check for skip pinned case is wrong, it may breaks the while loop too soon. Signed-off-by:
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Yan, Zheng authored
iput() can trigger new transactions if we are dropping the final reference, so calling it in btrfs_commit_transaction may end up deadlock. This patch adds delayed iput to avoid the issue. Signed-off-by:
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Yan, Zheng authored
Pass transaction handle down to security and ACL initialization functions, so we can avoid starting nested transactions Signed-off-by:
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Yan, Zheng authored
truncating and deleting regular files are unbound operations, so it's not good to do them in a single transaction. This patch makes btrfs_truncate and btrfs_delete_inode start a new transaction after all items in a tree leaf are deleted. Signed-off-by:
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Yan, Zheng authored
fallocate(2) may allocate large number of file extents, so it's not good to do it in a single transaction. This patch make fallocate(2) start a new transaction for each file extents it allocates. Signed-off-by:
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