summaryrefslogtreecommitdiffstats
Commit message (Collapse)AuthorAgeFilesLines
* Merge branch 'i2c-for-linus' of ↵Linus Torvalds2009-09-2324-934/+641
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging * 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging: i2c: Clearly mark ACPI drivers as such i2c: Add driver for SMBus Control Method Interface i2c-pnx: Correct use of request_region/request_mem_region MAINTAINERS: Add maintainer for AT24 and PCA9564/PCA9665 i2c-piix4: Add AMD SB900 SMBus device ID i2c/chips: Remove deprecated pcf8574 driver i2c/chips: Remove deprecated pca9539 driver i2c/chips: Remove deprecated pcf8575 driver gpio/pcf857x: Copy i2c_device_id from old pcf8574 driver i2c/scx200_acb: Provide more information on bus errors i2c: Provide compatibility links for i2c adapters i2c: Convert i2c adapters to bus devices i2c: Convert i2c clients to a device type i2c/tsl2550: Use combined SMBus transactions i2c-taos-evm: Switch echo off to improve performance i2c: Drop unused i2c_driver.id field
| * i2c: Clearly mark ACPI drivers as suchJean Delvare2009-09-182-12/+17
| | | | | | | | | | | | | | | | | | | | | | | | Now that we have ACPI-based SMBus controller drivers, and we will start telling users to use them instead of native drivers when I/O resources conflict, I think it would be good to clearly mark ACPI drivers as such in Kconfig. This is exactly the same as we just did for hwmon drivers. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Crane Cai <crane.cai@amd.com>
| * i2c: Add driver for SMBus Control Method InterfaceCrane Cai2009-09-183-0/+444
| | | | | | | | | | | | | | | | | | This driver supports the SMBus Control Method Interface. It needs BIOS declare ACPI control methods which described in SMBus Control Method Interface Spec. http://smbus.org/specs/smbus_cmi10.pdf Signed-off-by: Crane Cai <crane.cai@amd.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
| * i2c-pnx: Correct use of request_region/request_mem_regionJulia Lawall2009-09-181-3/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | request_mem_region should be used when ioremap is used subsequently. release_region is then correspondingly replaced by release_mem_region. The semantic patch that fixes this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r@ expression start,E; @@ - request_region + request_mem_region (start,...) ... when != request_mem_region(start,...) when != start = E ioremap(start,...) @@ expression r.start; @@ - release_region + release_mem_region (start,...) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Cc: Vitaly Wool <vitalywool@gmail.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
| * MAINTAINERS: Add maintainer for AT24 and PCA9564/PCA9665Wolfram Sang2009-09-181-0/+16
| | | | | | | | | | | | | | | | | | Add me as the maintainer for the i2c drivers I feel responsible for as I found patches going mainline I missed due to no Cc. Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Cc: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
| * i2c-piix4: Add AMD SB900 SMBus device IDCrane Cai2009-09-184-4/+11
| | | | | | | | | | | | | | Add new SMBus device ID for AMD SB900. Signed-off-by: Crane Cai <crane.cai@amd.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
| * i2c/chips: Remove deprecated pcf8574 driverWolfram Sang2009-09-184-298/+0
| | | | | | | | | | | | | | | | | | | | The pcf8574 driver in drivers/i2c/chips which just exports its register to sysfs is superseded by drivers/gpio/pcf857x.c which properly uses the gpiolib. As this driver has been deprecated for more than a year, finally remove it. Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Cc: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
| * i2c/chips: Remove deprecated pca9539 driverWolfram Sang2009-09-184-224/+0
| | | | | | | | | | | | | | | | | | | | The pca9539 driver in drivers/i2c/chips which just exports its registers to sysfs is superseded by drivers/gpio/pca953x.c which properly uses the gpiolib. As this driver has been deprecated for more than a year, finally remove it. Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Ben Gardner <gardner.ben@gmail.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
| * i2c/chips: Remove deprecated pcf8575 driverWolfram Sang2009-09-184-286/+0
| | | | | | | | | | | | | | | | | | | | The pcf8575 driver in drivers/i2c/chips which just exports its register to sysfs is superseded by drivers/gpio/pcf857x.c which properly uses the gpiolib. As this driver has been deprecated for more than a year, finally remove it. Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Cc: Bart Van Assche <bart.vanassche@gmail.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
| * gpio/pcf857x: Copy i2c_device_id from old pcf8574 driverWolfram Sang2009-09-181-0/+1
| | | | | | | | | | | | | | | | | | The deprecated pcf8574 driver is going to be removed. Make sure the replacement driver inherits all i2c_device_ids for a smooth transition. Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Cc: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
| * i2c/scx200_acb: Provide more information on bus errorsWilly Tarreau2009-09-181-2/+4
| | | | | | | | | | | | | | | | | | Upon a bus error, it's rather hard to guess what happened. Dumping the address, length and status provides a lot of value for troubleshooting issues. Signed-off-by: Willy Tarreau <wtarreau@exceliance.fr> Signed-off-by: Jean Delvare <khali@linux-fr.org>
| * i2c: Provide compatibility links for i2c adaptersJean Delvare2009-09-182-1/+40
| | | | | | | | | | | | | | | | | | Some user-space applications may be relying on i2c adapters showing up as class devices in sysfs. Provide compatibility links for them for the time being. We will remove them after a long transition period. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Kay Sievers <kay.sievers@vrfy.org>
| * i2c: Convert i2c adapters to bus devicesJean Delvare2009-09-181-35/+40
| | | | | | | | | | | | | | | | Kay says i2c adapters shouldn't be class devices but bus devices. Convert them that way, using a device type. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Kay Sievers <kay.sievers@vrfy.org>
| * i2c: Convert i2c clients to a device typeJean Delvare2009-09-181-20/+47
| | | | | | | | | | | | | | This is required for upcoming changes. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Kay Sievers <kay.sievers@vrfy.org>
| * i2c/tsl2550: Use combined SMBus transactionsJean Delvare2009-09-181-32/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make the I/O faster, mainly by using combined SMBus transactions when possible. While the TSL2550 datasheet doesn't say the device supports them, they seem to work just fine in practice, and a combined transaction is faster than two simple transactions in many cases and always more reliable. A side effect is to suppress the delays between SMBus writes and reads. The datasheet doesn't say they are needed and things work just fine for me without them. I also couldn't see any reason for the delay between reading the two channels. Nor for the loop to get a reading in the first place. The 400 ms delay between samples only matters at chip power-up, after that the chip always hold the previously sampled value so we never get to wait. All these changes make reading the lux value much faster and cheaper. Signed-off-by: Jean Delvare <khali@linux-fr.org> Tested-by: Michele De Candia <michele.decandia@valueteam.com> Cc: Rodolfo Giometti <giometti@linux.it>
| * i2c-taos-evm: Switch echo off to improve performanceJean Delvare2009-09-181-21/+24
| | | | | | | | | | | | | | | | When echo is on, we waste time reading back our orders. Switching echo off makes performance much better: SMBus byte data transactions are 47% faster and byte transactions are 24% faster. Signed-off-by: Jean Delvare <khali@linux-fr.org>
| * i2c: Drop unused i2c_driver.id fieldJean Delvare2009-09-182-13/+0
| | | | | | | | | | | | Nobody is using i2c_driver.id any longer, so we can drop that field. Signed-off-by: Jean Delvare <khali@linux-fr.org>
* | Merge branch 'upstream-linus' of ↵Linus Torvalds2009-09-2340-1176/+8512
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2 * 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2: (85 commits) ocfs2: Use buffer IO if we are appending a file. ocfs2: add spinlock protection when dealing with lockres->purge. dlmglue.c: add missed mlog lines ocfs2: __ocfs2_abort() should not enable panic for local mounts ocfs2: Add ioctl for reflink. ocfs2: Enable refcount tree support. ocfs2: Implement ocfs2_reflink. ocfs2: Add preserve to reflink. ocfs2: Create reflinked file in orphan dir. ocfs2: Use proper parameter for some inode operation. ocfs2: Make transaction extend more efficient. ocfs2: Don't merge in 1st refcount ops of reflink. ocfs2: Modify removing xattr process for refcount. ocfs2: Add reflink support for xattr. ocfs2: Create an xattr indexed block if needed. ocfs2: Call refcount tree remove process properly. ocfs2: Attach xattr clusters to refcount tree. ocfs2: Abstract ocfs2 xattr tree extend rec iteration process. ocfs2: Abstract the creation of xattr block. ocfs2: Remove inode from ocfs2_xattr_bucket_get_name_value. ...
| * | ocfs2: Use buffer IO if we are appending a file.Tao Ma2009-09-231-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In ocfs2_file_aio_write, we will prevent direct io if we find that we are appending(changing i_size) and call generic_file_aio_write_nolock. But actually O_DIRECT flag is there and this function will call generic_file_direct_write eventually which will update i_size and leave di->i_size alone. The bug is http://oss.oracle.com/bugzilla/show_bug.cgi?id=1173. So this patch let ocfs2_direct_IO returns 0 directly if we are appending so that buffered write will be called and di->i_size get updated successfully. And this is also what we want in ocfs2_file_aio_write. Signed-off-by: Tao Ma <tao.ma@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com>
| * | ocfs2: add spinlock protection when dealing with lockres->purge.Wengang Wang2009-09-231-1/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | when we check/modify lockres->purge, we should with the protection of lockres->spinlock. in dlm_purge_lockres(), the checking/modifying is not with the protectin. this patch fixes it. Signed-off-by: Wengang Wang <wen.gang.wang@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com>
| * | dlmglue.c: add missed mlog linesColy Li2009-09-231-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds the missed mlog_exit() and mlog_exit_void() lines when routines return. Signed-off-by: Coly Li <coly.li@suse.de> Acked-by: Mark Fasheh <mfasheh@suse.com> Signed-off-by: Joel Becker <joel.becker@oracle.com>
| * | ocfs2: __ocfs2_abort() should not enable panic for local mountsSunil Mushran2009-09-231-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In a clustered setup, we have to panic the box on journal abort. This is because we don't have the facility to go hard readonly. With hard ro, another node would detect node failure and initiate recovery. Having said that, we shouldn't force panic if the volume is mounted locally. This patch defers the handling to the mount option, errors. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com>
| * | ocfs2: Add ioctl for reflink.Tao Ma2009-09-224-0/+193
| | | | | | | | | | | | | | | | | | | | | | | | The ioctl will take 3 parameters: old_path, new_path and preserve and call vfs_reflink. It is useful when we backport reflink features to old kernels. Signed-off-by: Tao Ma <tao.ma@oracle.com>
| * | ocfs2: Enable refcount tree support.Tao Ma2009-09-221-1/+2
| | | | | | | | | | | | Signed-off-by: Tao Ma <tao.ma@oracle.com>
| * | ocfs2: Implement ocfs2_reflink.Tao Ma2009-09-221-0/+123
| | | | | | | | | | | | | | | | | | Implement ocfs2_reflink. Signed-off-by: Tao Ma <tao.ma@oracle.com>
| * | ocfs2: Add preserve to reflink.Tao Ma2009-09-223-22/+119
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | reflink has 2 options for the destination file: 1. snapshot: reflink will attempt to preserve ownership, permissions, and all other security state in order to create a full snapshot. 2. new file: it will acquire the data extent sharing but will see the file's security state and attributes initialized as a new file. So add the option to ocfs2. Signed-off-by: Tao Ma <tao.ma@oracle.com>
| * | ocfs2: Create reflinked file in orphan dir.Tao Ma2009-09-222-0/+274
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | reflink is a very complicated process, so it can't be integrated into one transaction. So if the system panic in the operation, we may leave a unfinished inode in the destication directory. So we will try to create an inode in orphan_dir first, reflink it to the src file and then move it to the destication file in the end. In that way we won't be afraid of any corruption during the reflink. This patch adds 2 functions for orphan_dir operation: 1. Create a new inode in orphand dir. 2. Move an inode to a target dir. Note: fsck.ocfs2 should work for us to remove the unfinished file in the orphan_dir. Signed-off-by: Tao Ma <tao.ma@oracle.com>
| * | ocfs2: Use proper parameter for some inode operation.Tao Ma2009-09-221-15/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In order to make the original function more suitable for reflink, we modify the following inode operations. Both are tiny. 1. ocfs2_mknod_locked only use dentry for mlog, so move it to the caller so that reflink can use it without dentry. 2. ocfs2_prepare_orphan_dir only want inode to get its ip_blkno. So use ip_blkno instead. Signed-off-by: Tao Ma <tao.ma@oracle.com>
| * | ocfs2: Make transaction extend more efficient.Tao Ma2009-09-221-2/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In ocfs2_extend_rotate_transaction, op_credits is the orignal credits in the handle and we only want to extend the credits for the rotation, but the old solution always double it. It is harmless for some minor operations, but for actions like reflink we may rotate tree many times and cause the credits increase dramatically. So this patch try to only increase the desired credits. Signed-off-by: Tao Ma <tao.ma@oracle.com>
| * | ocfs2: Don't merge in 1st refcount ops of reflink.Tao Ma2009-09-221-20/+36
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Actually the whole reflink will touch refcount tree 2 times: 1. It will add the clusters in the extent record to the tree if it isn't refcounted before. 2. It will add 1 refcount to these clusters when it add these extent records to the tree. So actually we shouldn't do merge in the 1st operation since the 2nd one will soon be called and we may have to split it again. Do a merge first and split soon is a waste of time. So we only merge in the 2nd round. This is done by adding a new internal __ocfs2_increase_refcount and call it with "not-merge" for 1st refcount operation in reflink. This also has a side-effect that we don't need to worry too much about the metadata allocation in the 2nd round since it will only merge and no split will happen for those records. Signed-off-by: Tao Ma <tao.ma@oracle.com>
| * | ocfs2: Modify removing xattr process for refcount.Tao Ma2009-09-221-36/+154
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The old xattr value remove is quite simple, it just erase the tree and free the clusters. But as we have added refcount support, The process is a little complicated. We have to lock the refcount tree at the beginning, what's more, we may split the refcount tree in some cases, so meta/credits are needed. Signed-off-by: Tao Ma <tao.ma@oracle.com>
| * | ocfs2: Add reflink support for xattr.Tao Ma2009-09-224-12/+945
| | | | | | | | | | | | Signed-off-by: Tao Ma <tao.ma@oracle.com>
| * | ocfs2: Create an xattr indexed block if needed.Tao Ma2009-09-221-2/+14
| | | | | | | | | | | | | | | | | | | | | | | | With reflink, there is a need that we create a new xattr indexed block from the very beginning. So add a new parameter for ocfs2_create_xattr_block. Signed-off-by: Tao Ma <tao.ma@oracle.com>
| * | ocfs2: Call refcount tree remove process properly.Tao Ma2009-09-226-0/+73
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now with xattr refcount support, we need to check whether we have xattr refcounted before we remove the refcount tree. Now the mechanism is: 1) Check whether i_clusters == 0, if no, exit. 2) check whether we have i_xattr_loc in dinode. if yes, exit. 2) Check whether we have inline xattr stored outside, if yes, exit. 4) Remove the tree. Signed-off-by: Tao Ma <tao.ma@oracle.com>
| * | ocfs2: Attach xattr clusters to refcount tree.Tao Ma2009-09-224-4/+329
| | | | | | | | | | | | | | | | | | | | | | | | | | | In ocfs2, when xattr's value is larger than OCFS2_XATTR_INLINE_SIZE, it will be kept outside of the blocks we store xattr entry. And they are stored in a b-tree also. So this patch try to attach all these clusters to refcount tree also. Signed-off-by: Tao Ma <tao.ma@oracle.com>
| * | ocfs2: Abstract ocfs2 xattr tree extend rec iteration process.Tao Ma2009-09-221-71/+76
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently we have ocfs2_iterate_xattr_buckets which can receive a para and a callback to iterate a series of bucket. It is good. But actually the 2 callers ocfs2_xattr_tree_list_index_block and ocfs2_delete_xattr_index_block are almost the same. The only difference is that the latter need to handle the extent record also. So add a new function named ocfs2_iterate_xattr_index_block. It can be given func callback which are used for exten record. So now we only have one iteration function for the xattr index block. Ane what's more, it is useful for our future reflink operations. Signed-off-by: Tao Ma <tao.ma@oracle.com>
| * | ocfs2: Abstract the creation of xattr block.Tao Ma2009-09-221-45/+70
| | | | | | | | | | | | | | | | | | | | | In xattr reflink, we also need to create xattr block, so abstract the process out. Signed-off-by: Tao Ma <tao.ma@oracle.com>
| * | ocfs2: Remove inode from ocfs2_xattr_bucket_get_name_value.Tao Ma2009-09-221-10/+10
| | | | | | | | | | | | | | | | | | | | | In ocfs2_xattr_bucket_get_name_value, actually we only use super_block. So use it. Signed-off-by: Tao Ma <tao.ma@oracle.com>
| * | ocfs2: Add CoW support for xattr.Tao Ma2009-09-223-15/+494
| | | | | | | | | | | | | | | | | | | | | In order to make 2 transcation(xattr and cow) independent with each other, we CoW the whole xattr out in case we are setting them. Signed-off-by: Tao Ma <tao.ma@oracle.com>
| * | ocfs2: Abstract duplicate clusters process in CoW.Tao Ma2009-09-221-56/+71
| | | | | | | | | | | | | | | | | | | | | | | | We currently use pagecache to duplicate clusters in CoW, but it isn't suitable for xattr case. So abstract it out so that the caller can decide which method it use. Signed-off-by: Tao Ma <tao.ma@oracle.com>
| * | ocfs2: Return extent flags for xattr value tree.Tao Ma2009-09-223-5/+11
| | | | | | | | | | | | | | | | | | | | | | | | With the new refcount tree, xattr value can also be refcounted among multiple files. So return the appropriate extent flags so that CoW can used it later. Signed-off-by: Tao Ma <tao.ma@oracle.com>
| * | ocfs2: handle file attributes issue for reflink.Tao Ma2009-09-221-2/+120
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A reflink creates a snapshot of a file, that means the attributes must be identical except for three exceptions - nlink, ino, and ctime. As for time changes, Here is a brief description: 1. Source file: 1) atime: Ignore. Let the lazy atime code handle that. 2) mtime: don't touch. 3) ctime: If we change the tree (adding REFCOUNTED to at least one extent), update it. 2. Destination file: 1) atime: ignore. 2) mtime: we want it to appear identical to the source. 3) ctime: update. The idea here is that an ls -l will show the same time for the src and target - it shows mtime. Backup software like rsync and tar will treat the new file correctly too. Signed-off-by: Tao Ma <tao.ma@oracle.com>
| * | ocfs2: Add normal functions for reflink a normal file's extents.Tao Ma2009-09-221-0/+286
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 2 major functions are added in this patch. ocfs2_attach_refcount_tree will create a new refcount tree to the old file if it doesn't have one and insert all the extent records to the tree if they are not refcounted. ocfs2_create_reflink_node will: 1. set the refcount tree to the new file. 2. call ocfs2_duplicate_extent_list which will iterate all the extents for the old file, insert it to the new file and increase the corresponding referennce count. Signed-off-by: Tao Ma <tao.ma@oracle.com>
| * | ocfs2: CoW a reflinked cluster when it is truncated.Tao Ma2009-09-224-14/+70
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When we truncate a file to a specific size which resides in a reflinked cluster, we need to CoW it since ocfs2_zero_range_for_truncate will zero the space after the size(just another type of write). So we add a "max_cpos" in ocfs2_refcount_cow so that it will stop when it hit the max cluster offset. Signed-off-by: Tao Ma <tao.ma@oracle.com>
| * | ocfs2: Integrate CoW in file write.Tao Ma2009-09-223-1/+104
| | | | | | | | | | | | | | | | | | | | | | | | | | | When we use mmap, we CoW the refcountd clusters in ocfs2_write_begin_nolock. While for normal file io(including directio), we do CoW in ocfs2_prepare_inode_for_write. Signed-off-by: Tao Ma <tao.ma@oracle.com>
| * | ocfs2: CoW refcount tree improvement.Tao Ma2009-09-223-28/+81
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | During CoW, if the old extent record is refcounted, we allocate som new clusters and do CoW. Actually we can have some improvement here. If the old extent has refcount=1, that means now it is only used by this file. So we don't need to allocate new clusters, just remove the refcounted flag and it is OK. We also have to remove it from the refcount tree while not deleting it. Signed-off-by: Tao Ma <tao.ma@oracle.com>
| * | ocfs2: Add CoW support.Tao Ma2009-09-226-11/+841
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch try CoW support for a refcounted record. the whole process will be: 1. Calculate how many clusters we need to CoW and where we start. Extents that are not completely encompassed by the write will be broken on 1MB boundaries. 2. Do CoW for the clusters with the help of page cache. 3. Change the b-tree structure with the new allocated clusters. Signed-off-by: Tao Ma <tao.ma@oracle.com>
| * | ocfs2: Decrement refcount when truncating refcounted extents.Tao Ma2009-09-224-7/+290
| | | | | | | | | | | | | | | | | | | | | | | | Add 'Decrement refcount for delete' in to the normal truncate process. So for a refcounted extent record, call refcount rec decrementation instead of cluster free. Signed-off-by: Tao Ma <tao.ma@oracle.com>
| * | ocfs2: Add functions for extents refcounted.Tao Ma2009-09-224-6/+58
| | | | | | | | | | | | | | | | | | | | | Add function ocfs2_mark_extent_refcounted which can mark an extent refcounted. Signed-off-by: Tao Ma <tao.ma@oracle.com>
| * | ocfs2: Add support of decrementing refcount for delete.Tao Ma2009-09-224-5/+265
| | | | | | | | | | | | | | | | | | | | | | | | Given a physical cpos and length, decrement the refcount in the tree. If the refcount for any portion of the extent goes to zero, that portion is queued for freeing. Signed-off-by: Tao Ma <tao.ma@oracle.com>
generated by cgit (git 2.34.1) at 2024-11-20 15:26:02 +0000