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* mmc_test: fix display of .5 KiBAdrian Hunter2010-10-23
| | | | | | | Append .5 to KiB display when there are an odd number of sectors. Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com> Signed-off-by: Chris Ball <cjb@laptop.org>
* mmc_test: fix memory allocation segment limitsAdrian Hunter2010-10-23
| | | | | | | | Correctly allocate memory to meet the host controller driver's maximum segment size and count limits. Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com> Signed-off-by: Chris Ball <cjb@laptop.org>
* mmc_test: move files from sysfs to debugfsAndy Shevchenko2010-10-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | As proposed by Greg K-H it is more logical to keep files for the mmc_test driver under debugfs. Additionally this patch brings seq_file API for show() method. It allows to write unlimited data to the file. Example of usage: # mount -t debugfs none /sys/kernel/debug # modprobe mmc_test [ 581.395843] mmc_test mmc0:0001: Card claimed for testing. # echo 25 > /sys/kernel/debug/mmc0/mmc0\:0001/test [ 604.568542] mmc0: Starting tests of card mmc0:0001... [ 604.582733] mmc0: Test case 25. Best-case read performance into scattered pages... [ 604.923553] mmc0: Transfer of 8192 sectors (4096 KiB) took 0.124664314 seconds (33644 kB/s, 32856 KiB/s) [ 604.933227] mmc0: Result: OK [ 604.936248] mmc0: Tests completed. # cat /sys/kernel/debug/mmc0/mmc0\:0001/test Test 25: 0 1 8192 0.124664314 33644784 Signed-off-by: Andy Shevchenko <ext-andriy.shevchenko@nokia.com> Cc: Greg KH <greg@kroah.com> Cc: Adrian Hunter <adrian.hunter@nokia.com> Cc: Chris Ball <cjb@laptop.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Chris Ball <cjb@laptop.org>
* mmc_test: collect data and show it via sysfs by demandAndy Shevchenko2010-10-23
| | | | | | | | | | | | | | | | | | | | | | Make it possible to get test results via sysfs. It helps to do tests non-interactively. We have the file created under sysfs already and can use it to show test results. Prior to this patch, the "test" file under each card's sysfs node was write-only, and results were obtained by looking at dmesg. This patch improves programmatic access to the test results, making them available by reading back from the same "test" file: [root@host mmc0:e624]# echo 6 > test [root@host mmc0:e624]# cat test Test 6: 2 [cjb@laptop.org: changelog improvements] Signed-off-by: Andy Shevchenko <ext-andriy.shevchenko@nokia.com> Cc: Chris Ball <cjb@laptop.org> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Chris Ball <cjb@laptop.org>
* mmc_test: change simple_strtol() to strict_strtol()Andy Shevchenko2010-10-23
| | | | | | | | | | | It's better to use strict_strtol() to convert user's input and strictly check it. At least it forbids to interpret wrong input as a 0 and prevents to run all tests. Signed-off-by: Andy Shevchenko <ext-andriy.shevchenko@nokia.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Chris Ball <cjb@laptop.org>
* mmc_test: use API to check card typeAndy Shevchenko2010-10-23
| | | | | | | | | | There are methods to check card type. Let's use them instead of direct checking type bits. Signed-off-by: Andy Shevchenko <ext-andriy.shevchenko@nokia.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Chris Ball <cjb@laptop.org>
* mmc_test: fix performance tests that go over max_blk_countAdrian Hunter2010-10-23
| | | | | | | | | | | The host controller driver limits I/O transfers to maximum transfer size, maximum block count, maximum segment size and maximum segment count. The performance tests were not obeying these limits which meant they would not work with some drivers. This patch fixes that. Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com> Signed-off-by: Chris Ball <cjb@laptop.org>
* mmc: Convert "mutex" to semaphoreThomas Gleixner2010-10-23
| | | | | | | | Get rid of init_MUTEX[_LOCKED]() and use sema_init() instead. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: linux-mmc@vger.kernel.org Signed-off-by: Chris Ball <cjb@laptop.org>
* mmc: rename dev_to_mmc_card() to mmc_dev_to_card()Andy Shevchenko2010-10-23
| | | | | | | | | Global symbols should use their subsystem name in a prefixed fashion. Signed-off-by: Andy Shevchenko <ext-andriy.shevchenko@nokia.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Chris Ball <cjb@laptop.org>
* mmc: make mmc_dev_to_card() macro publicAndy Shevchenko2010-10-23
| | | | | | | | | | | Conversion from struct device to struct mmc_card is used more than in one place. Due to this it's better to have public macro for such thing. Signed-off-by: Andy Shevchenko <ext-andriy.shevchenko@nokia.com> Cc: Adrian Hunter <adrian.hunter@nokia.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Chris Ball <cjb@laptop.org>
* mmc: Use snprintf, not sprintf.JiebingLi2010-10-23
| | | | | | | | | | Fix an issue found by klockwork. Just paranoia. Signed-off-by: JiebingLi <jiebing.li@intel.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Chris Ball <cjb@laptop.org>
* mmc: USB SD Host Controller (USHC) driverDavid Vrabel2010-10-23
| | | | | | | | | | Add a driver for USB SD Host Controller devices. These devices are Cypress Astoria chips with firmware compliant with issue 2 of CSR's USHC specification. [cjb: adapt to block layer deprecation of max_{hw,phys}_segs] Signed-off-by: David Vrabel <david.vrabel@csr.com> Signed-off-by: Chris Ball <cjb@laptop.org>
* mmc: Remove distinction between hw and phys segmentsMartin K. Petersen2010-10-23
| | | | | | | | | We have deprecated the distinction between hardware and physical segments in the block layer. Consolidate the two limits into one in drivers/mmc/. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Chris Ball <cjb@laptop.org>
* mmc: au1xmmc.c: use resource_size()H Hartley Sweeten2010-10-23
| | | | | | | | | [cjb: rebased patch against Linus] Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc: <linux-mmc@vger.kernel.org> Acked-by: Manuel Lauss <manuel.lauss@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Chris Ball <cjb@laptop.org>
* mmc: atmel-mci.c: use resource_size()H Hartley Sweeten2010-10-23
| | | | | | | | | [cjb: rebased patch against Linus] Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Chris Ball <cjb@laptop.org>
* mmc: at91_mci.c: use resource_size()H Hartley Sweeten2010-10-23
| | | | | | | | | | | [cjb: rebased patch against Linus] Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: <linux-mmc@vger.kernel.org> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Chris Ball <cjb@laptop.org>
* Merge branch 'for-linus' of ↵Linus Torvalds2010-10-23
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2: (36 commits) nilfs2: eliminate sparse warning - "context imbalance" nilfs2: eliminate sparse warnings - "symbol not declared" nilfs2: get rid of bdi from nilfs object nilfs2: change license of exported header file nilfs2: add bdev freeze/thaw support nilfs2: accept 64-bit checkpoint numbers in cp mount option nilfs2: remove own inode allocator and destructor for metadata files nilfs2: get rid of back pointer to writable sb instance nilfs2: get rid of mi_nilfs back pointer to nilfs object nilfs2: see state of root dentry for mount check of snapshots nilfs2: use iget for all metadata files nilfs2: get rid of GCDAT inode nilfs2: add routines to redirect access to buffers of DAT file nilfs2: add routines to roll back state of DAT file nilfs2: add routines to save and restore bmap state nilfs2: do not allocate nilfs_mdt_info structure to gc-inodes nilfs2: allow nilfs_clear_inode to clear metadata file inodes nilfs2: get rid of snapshot mount flag nilfs2: simplify life cycle management of nilfs object nilfs2: do not allocate multiple super block instances for a device ...
| * nilfs2: eliminate sparse warning - "context imbalance"Jiro SEKIBA2010-10-22
| | | | | | | | | | | | | | | | | | | | | | | | | | insert sparse annotations to fix following sparse warning. fs/nilfs2/segment.c:2681:3: warning: context imbalance in 'nilfs_segctor_kill_thread' - unexpected unlock nilfs_segctor_kill_thread is only called inside sc_state_lock lock. sparse doesn't detect the context and warn "unexpected unlock". __acquires/__releases pretend to lock/unlock the sc_state_lock for sparse. Signed-off-by: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: eliminate sparse warnings - "symbol not declared"Jiro SEKIBA2010-10-22
| | | | | | | | | | | | | | | | | | | | | | change nilfs_dat_commit_free and nilfs_inode_cachep static to fix following warnings fs/nilfs2/super.c:72:19: warning: symbol 'nilfs_inode_cachep' was not declared. Should it be static? fs/nilfs2/dat.c:106:6: warning: symbol 'nilfs_dat_commit_free' was not declared. Should it be static? Signed-off-by: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: get rid of bdi from nilfs objectRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | Nilfs now can use sb->s_bdi to get backing_dev_info, so we use it instead of ns_bdi on the nilfs object and remove ns_bdi. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: change license of exported header fileRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This allows other projects to carry copies of the header file related to ABI and disk format (i.e. "nilfs2_fs.h") without it or distributors having to worry about effects on the project's overall license terms. It's also desired for switching the license of nilfs library to LGPL. Jiro SEKIBA pointed out these license issues (Message-ID: <87tylo7msw.wl%jir@sekiba.com>), and he suggested switching license of the library and nilfs2_fs.h to GNU Lesser General Public License. We take in his suggestion to avoid the license issues. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Cc: Jiro SEKIBA <jir@unicus.jp> Cc: linux-nilfs <linux-nilfs@vger.kernel.org>
| * nilfs2: add bdev freeze/thaw supportRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | | | | | | | | | Nilfs hasn't supported the freeze/thaw feature because it didn't work due to the peculiar design that multiple super block instances could be allocated for a device. This limitation was removed by the patch "nilfs2: do not allocate multiple super block instances for a device". So now this adds the freeze/thaw support to nilfs. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: accept 64-bit checkpoint numbers in cp mount optionRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | | | | | | | The current implementation doesn't mount snapshots with checkpoint numbers larger than INT_MAX since it uses match_int() for parsing "cp=" mount option. This uses simple_strtoull() for the conversion to resolve the issue. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: remove own inode allocator and destructor for metadata filesRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | | | | | This finally removes own inode allocator and destructor functions for metadata files. Several routines, nilfs_mdt_new(), nilfs_mdt_new_common(), nilfs_mdt_clear(), nilfs_mdt_destroy(), and nilfs_alloc_inode_common() will be gone. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: get rid of back pointer to writable sb instanceRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | | | | | | | | | Nilfs object holds a back pointer to a writable super block instance in nilfs->ns_writer, and this became eliminable since sb is now made per device and all inodes have a valid pointer to it. This deletes the ns_writer pointer and a reader/writer semaphore protecting it. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: get rid of mi_nilfs back pointer to nilfs objectRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | This removes a back pointer to nilfs object from nilfs_mdt_info structure that is attached to metadata files. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: see state of root dentry for mount check of snapshotsRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | | | | | | | | | | | | | After applied the patch that unified sb instances, root dentry of snapshots can be left in dcache even after their trees are unmounted. The orphan root dentry/inode keeps a root object, and this causes false positive of nilfs_checkpoint_is_mounted function. This resolves the issue by having nilfs_checkpoint_is_mounted test whether the root dentry is busy or not. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: use iget for all metadata filesRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | This makes use of iget5_locked to allocate or get inode for metadata files to stop using own inode allocator. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: get rid of GCDAT inodeRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | This applies prepared rollback function and redirect function of metadata file to DAT file, and eliminates GCDAT inode. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: add routines to redirect access to buffers of DAT fileRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | During garbage collection (GC), DAT file, which converts virtual block number to real block number, may return disk block number that is not yet written to the device. To avoid access to unwritten blocks, the current implementation stores changes to the caches of GCDAT during GC and atomically commit the changes into the DAT file after they are written to the device. This patch, instead, adds a function that makes a copy of specified buffer and stores it in nilfs_shadow_map, and a function to get the backup copy as needed (nilfs_mdt_freeze_buffer and nilfs_mdt_get_frozen_buffer respectively). Before DAT changes block number in an entry block, it makes a copy and redirect access to the buffer so that address conversion function (i.e. nilfs_dat_translate) refers to the old address saved in the copy. This patch gives requisites for such redirection. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: add routines to roll back state of DAT fileRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds optional function to metadata files which makes a copy of bmap, page caches, and b-tree node cache, and rolls back to the copy as needed. This enhancement is intended to displace gcdat inode that provides a similar function in a different way. In this patch, nilfs_shadow_map structure is added to store a copy of the foregoing states. nilfs_mdt_setup_shadow_map relates this structure to a metadata file. And, nilfs_mdt_save_to_shadow_map() and nilfs_mdt_restore_from_shadow_map() provides save and restore functions respectively. Finally, nilfs_mdt_clear_shadow_map() clears states of nilfs_shadow_map. The copy of b-tree node cache and page cache is made by duplicating only dirty pages into corresponding caches in nilfs_shadow_map. Their restoration is done by clearing dirty pages from original caches and by copying dirty pages back from nilfs_shadow_map. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: add routines to save and restore bmap stateRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | | | | | | | This adds routines to save and restore the state of bmap structure. The bmap state is stored in a given nilfs_bmap_store object. These routines will be used to roll back the state of dat inode without using gcdat inode. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: do not allocate nilfs_mdt_info structure to gc-inodesRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | | | | | | | GC-inode now doesn't need the nilfs_mdt_info structure and there is no reason that it is a sort of metadata files. This stops the allocation and makes them not dependent on metadata file routines. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: allow nilfs_clear_inode to clear metadata file inodesRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | | | Allows clear inode function (nilfs_clear_inode) to handle metadata files that uses bitmap-based object alloctor. DAT and ifile correspond to this. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: get rid of snapshot mount flagRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | This flag is a fake used to distinguish type of super block instance. And, it got obsolete by the unification of sb. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: simplify life cycle management of nilfs objectRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | | | | | | | | | This stops pre-allocating nilfs object in nilfs_get_sb routine, and stops managing its life cycle by reference counting. nilfs_find_or_create_nilfs() function, nilfs->ns_mount_mutex, nilfs_objects list, and the reference counter will be removed through the simplification. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: do not allocate multiple super block instances for a deviceRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This stops allocating multiple super block instances for a device. All snapshots and a current mode mount (i.e. latest tree) will be controlled with nilfs_root objects that are kept within an sb instance. nilfs_get_sb() is rewritten so that it always has a root object for the latest tree and snapshots make additional root objects. The root dentry of the latest tree is binded to sb->s_root even if it isn't attached on a directory. Root dentries of snapshots or the latest tree are binded to mnt->mnt_root on which they are mounted. With this patch, nilfs_find_sbinfo() function, nilfs->ns_supers list, and nilfs->ns_current back pointer, are deleted. In addition, init_nilfs() and load_nilfs() are simplified since they will be called once for a device, not repeatedly called for mount points. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: split out nilfs_attach_snapshotRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | This splits the code to attach snapshots into a separate routine for convenience sake. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: split out nilfs_get_root_dentryRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | This splits the code to allocate root dentry into a separate routine for convenience in successive changes. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: deny write access to inodes in snapshotsRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Snapshots of nilfs are read-only. After super block instances (sb) will be unified, nilfs will need to check write access by a way other than implicit test with IS_RDONLY(inode). This is because IS_RDONLY() refers to MS_RDONLY bit of inode->i_sb->s_flags and it will become inaccurate after the unification of sb. To prepare for the issue, this uses i_op->permission to deny write access to inodes in snapshots. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: use checkpoint tree for mount check of snapshotsRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | | | This rewrites nilfs_checkpoint_is_mounted() function so that it decides whether a checkpoint is mounted by whether the corresponding root object is found in checkpoint tree. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: move inode count and block count into root objectRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | This moves sbi->s_inodes_count and sbi->s_blocks_count into nilfs_root object. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: use root object to get ifileRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | | | This rewrites functions using ifile so that they get ifile from nilfs_root object, and will remove sbi->s_ifile. Some functions that don't know the root object are extended to receive it from caller. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: make snapshots in checkpoint tree exportableRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | | | | | | | | | The previous export operations cannot handle multiple versions of a filesystem if they belong to the same sb instance. This adds a new type of file handle and extends export operations so that they can get the inode specified by a checkpoint number as well as an inode number and a generation number. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: set pointer to root object in inodesRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | | | | | | | | | | | This puts a pointer to nilfs_root object in the private part of on-memory inode, and makes nilfs_iget function pick up the inode with the same root object. Non-root inodes inherit its nilfs_root object from parent inode. That of the root inode is allocated through nilfs_attach_checkpoint() function. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: add checkpoint tree to nilfs objectRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To hold multiple versions of a filesystem in one sb instance, a new on-memory structure is necessary to handle one or more checkpoints. This adds a red-black tree of checkpoints to nilfs object, and adds lookup and create functions for them. Each checkpoint is represented by "nilfs_root" structure, and this structure has rb_node to configure the rb-tree. The nilfs_root object is identified with a checkpoint number. For each snapshot, a nilfs_root object is allocated and the checkpoint number of snapshot is assigned to it. For a regular mount (i.e. current mode mount), NILFS_CPTREE_CURRENT_CNO constant is assigned to the corresponding nilfs_root object. Each nilfs_root object has an ifile inode and some counters. These items will displace those of nilfs_sb_info structure in successive patches. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: remove own inode hash used for GCRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | | | This uses inode hash function that vfs provides instead of the own hash table for caching gc inodes. This finally removes the own inode hash from nilfs. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: separate initializer of metadata file inodeRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | | | This separates a part of initialization code of metadata file inode, and makes it available from the nilfs iget function that a later patch will add to. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: use iget5_locked to get inodeRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | This uses iget5_locked instead of iget_locked so that gc cache can look up inodes with an inode number and an optional checkpoint number. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| * nilfs2: keep zero value in i_cno except for gc-inodesRyusuke Konishi2010-10-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | On-memory inode structures of nilfs have a member "i_cno" which stores a checkpoint number related to the inode. For gc-inodes, this field indicates version of data each gc-inode caches for GC. Log writer temporarily uses "i_cno" to transfer the latest checkpoint number. This stops the latter use and lets only gc-inodes use it. The purpose of this patch is to allow the successive change use "i_cno" for inode lookup. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-24 16:23:58 -0500