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* nilfs2: fix sync silent failureRyusuke Konishi2010-05-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | As of 32a88aa1, __sync_filesystem() will return 0 if s_bdi is not set. And nilfs does not set s_bdi anywhere. I noticed this problem by the warning introduced by the recent commit 5129a469 ("Catch filesystem lacking s_bdi"). WARNING: at fs/super.c:959 vfs_kern_mount+0xc5/0x14e() Hardware name: PowerEdge 2850 Modules linked in: nilfs2 loop tpm_tis tpm tpm_bios video shpchp pci_hotplug output dcdbas Pid: 3773, comm: mount.nilfs2 Not tainted 2.6.34-rc6-debug #38 Call Trace: [<c1028422>] warn_slowpath_common+0x60/0x90 [<c102845f>] warn_slowpath_null+0xd/0x10 [<c1095936>] vfs_kern_mount+0xc5/0x14e [<c1095a03>] do_kern_mount+0x32/0xbd [<c10a811e>] do_mount+0x671/0x6d0 [<c1073794>] ? __get_free_pages+0x1f/0x21 [<c10a684f>] ? copy_mount_options+0x2b/0xe2 [<c107b634>] ? strndup_user+0x48/0x67 [<c10a81de>] sys_mount+0x61/0x8f [<c100280c>] sysenter_do_call+0x12/0x32 This ensures to set s_bdi for nilfs and fixes the sync silent failure. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Acked-by: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* nilfs2: remove whitespaces before quoted newlinesRyusuke Konishi2010-03-13
| | | | | | | | | | | | | | This kills the following checkpatch warnings: WARNING: unnecessary whitespace before a quoted newline #869: FILE: super.c:869: + "remount to a different snapshot. \n", WARNING: unnecessary whitespace before a quoted newline #389: FILE: the_nilfs.c:389: + printk(KERN_ERR "NILFS: too short segment. \n"); Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: fix various typos in commentsRyusuke Konishi2010-03-13
| | | | | | This fixes various typos I found in comments of nilfs2. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: get rid of s_dirt flag useRyusuke Konishi2010-02-12
| | | | | | | | | | | This replaces s_dirt flag use in nilfs with a new flag added on the nilfs object. The s_dirt flag was used to indicate if sop->write_super() should be called, however the current version of nilfs does not use the callback. Thus, it can be replaced with the own flag. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Cc: Jiro SEKIBA <jir@unicus.jp>
* nilfs2: fix potential hang in nilfs_error on errors=remount-roRyusuke Konishi2010-02-12
| | | | | | | | | | | | | | | | nilfs_error() calls nilfs_detach_segment_constructor() if errors=remount-ro option is specified, and this may lead to a hang due to recursive locking of, for instance, nilfs->ns_segctor_sem and others. In this case, detaching segment constructor is not necessary because read-only flag is set to the filesystem and further writes are blocked. This fixes the potential hang issue by removing the nilfs_detach_segment_constructor() call from nilfs_error. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: issue discard request after cleaning segmentsJiro SEKIBA2010-02-12
| | | | | | | | | This adds a function to send discard requests for given array of segment numbers, and calls the function when garbage collection succeeded. Signed-off-by: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* switch nilfs2 to deactivate_locked_super()Al Viro2009-12-16
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* nilfs2: add norecovery mount optionRyusuke Konishi2009-11-19
| | | | | | | | | | | | | | This adds "norecovery" mount option which disables temporal write access to read-only mounts or snapshots during mount/recovery. Without this option, write access will be even performed for those types of mounts; the temporal write access is needed to mount root file system read-only after an unclean shutdown. This option will be helpful when user wants to prevent any write access to the device. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Cc: Eric Sandeen <sandeen@redhat.com>
* nilfs2: move recovery completion into load_nilfs functionRyusuke Konishi2009-11-19
| | | | | | | | | | | | | | Although mount recovery of nilfs is integrated in load_nilfs() procedure, the completion of recovery was isolated from the procedure and performed at the end of the fill_super routine. This was somewhat confusing since the recovery is needed for the nilfs object, not for a super block instance. To resolve the inconsistency, this will integrate the recovery completion into load_nilfs(). Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: hide nilfs_mdt_clear calls in nilfs_mdt_destroyRyusuke Konishi2009-11-19
| | | | | | | | | | This will hide a function call of nilfs_mdt_clear() in nilfs_mdt_destroy(). This ensures nilfs_mdt_destroy() to do cleanup jobs included in nilfs_mdt_clear(). Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: separate constructor of metadata filesRyusuke Konishi2009-11-19
| | | | | | | | | | | This will displace nilfs_mdt_new() constructor with individual metadata file constructors like nilfs_dat_new(), new_sufile_new(), nilfs_cpfile_new(), and nilfs_ifile_new(). This makes it possible for each metadata file to have own intialization code. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: add size option of private object to metadata file allocatorRyusuke Konishi2009-11-19
| | | | | | | | | | This adds an optional "object size" argument to nilfs_mdt_new_common() function; the argument specifies the size of private object attached to a newly allocated metadata file inode. This will afford space to keep local variables for meta data files. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: cleanup unused match_bool functionJiro SEKIBA2009-11-19
| | | | | | | match_bool function is not used anymore. Signed-off-by: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: Using nobarrier option instead of barrier=offJiro SEKIBA2009-11-19
| | | | | | | | Since most of fs using nofoobar style option, modified barrier=off option as nobarrier. Signed-off-by: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* const: mark remaining export_operations constAlexey Dobriyan2009-09-22
| | | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* const: mark remaining super_operations constAlexey Dobriyan2009-09-22
| | | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* nilfs2: remove individual gfp constants for each metadata fileRyusuke Konishi2009-09-14
| | | | | | | | This gets rid of NILFS_CPFILE_GFP, NILFS_SUFILE_GFP, NILFS_DAT_GFP, and NILFS_IFILE_GFP. All of these constants refer to NILFS_MDT_GFP, and can be removed. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: add more check routines in mount processZhu Yanhai2009-09-14
| | | | | | | | | nilfs2: Add more safeguard routines and protections in mount process, which also makes nilfs2 report consistency error messages when checkpoint number is invalid. Signed-off-by: Zhu Yanhai <zhu.yanhai@gmail.com> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: An unassigned variable is assigned to a never used structure memberZhang Qiang2009-09-14
| | | | | | | | | | | nilfs2: In procedure 'nilfs_get_sb()', when a nilfs filesysttem is mounted for the first time, local variable 'nilfs->ns_last_cno' is used before loading the latest checkpoint number from disk (in 'nilfs_fill_super'). 'nilfs->ns_last_cno' is assigned to 'sd.cno', but 'sd.cno' has never been used in the procedure. Signed-off-by: Zhang Qiang <zhangqiang.buaa@gmail.com> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: stop using periodic write_super callbackJiro SEKIBA2009-09-14
| | | | | | | | | | | | | | | This removes nilfs_write_super and commit super block in nilfs internal thread, instead of periodic write_super callback. VFS layer calls ->write_super callback periodically. However, it looks like that calling back is ommited when disk I/O is busy. And when cleanerd (nilfs GC) is runnig, disk I/O tend to be busy thus nilfs superblock is not synchronized as nilfs designed. To avoid it, syncing superblock by nilfs thread instead of pdflush. Signed-off-by: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: clean up nilfs_write_superJiro SEKIBA2009-09-14
| | | | | | | | Separate conditions that check if syncing super block and alternative super block are required as inline functions to reuse the conditions. Signed-off-by: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: fix disorder of nilfs_write_super in nilfs_sync_fsJiro SEKIBA2009-09-14
| | | | | | | | | | | | This fixes disorder of nilfs_write_super in nilfs_sync_fs. Commiting super block must be the end of the function so that every changes are reflected. ->sync_fs() is not called frequently so this makes nilfs_sync_fs call nilfs_commit_super instead of nilfs_write_super. Signed-off-by: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: remove redundant super block commitJiro SEKIBA2009-09-14
| | | | | | | | | | | | This removes redundant super block commit. nilfs_write_super will call nilfs_commit_super to store super block into block device. However, nilfs_put_super will call nilfs_commit_super right after calling nilfs_write_super. So calling nilfs_write_super in nilfs_put_super would be redundant. Signed-off-by: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: implement nilfs_show_options to display mount options in /proc/mountsJiro SEKIBA2009-09-14
| | | | | | | | | | | | This is a patch to display mount options in procfs. Mount options will show up in the /proc/mounts as other fs does. ... /dev/sda6 /mnt nilfs2 ro,relatime,barrier=off,cp=3,order=strict 0 0 ... Signed-off-by: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: missing a read lock for segment writer in nilfs_attach_checkpoint()Zhang Qiang2009-08-18
| | | | | | | | | | | 'ns_cno' of structure 'the_nilfs' must be protected from segment writer, in other words, the caller of nilfs_get_checkpoint should hold read lock for nilfs->ns_segctor_sem. This patch adds the lock/unlock operations in nilfs_attach_checkpoint() when calling nilfs_cpfile_get_checkpoint(). Signed-off-by: Zhang Qiang <zhangqiang.buaa@gmail.com> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* switch nilfs2 to inode->i_aclAl Viro2009-06-24
| | | | | | | Actually, get rid of private analog, since nothing in there is using ACLs at all so far. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* Merge branch 'for-linus' of ↵Linus Torvalds2009-06-15
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: (22 commits) nilfs2: support contiguous lookup of blocks nilfs2: add sync_page method to page caches of meta data nilfs2: use device's backing_dev_info for btree node caches nilfs2: return EBUSY against delete request on snapshot nilfs2: modify list of unsupported features in caveats nilfs2: enable sync_page method nilfs2: set bio unplug flag for the last bio in segment nilfs2: allow future expansion of metadata read out via get info ioctl NILFS2: Pagecache usage optimization on NILFS2 nilfs2: remove nilfs_btree_operations from btree mapping nilfs2: remove nilfs_direct_operations from direct mapping nilfs2: remove bmap pointer operations nilfs2: remove useless b_low and b_high fields from nilfs_bmap struct nilfs2: remove pointless NULL check of bpop_commit_alloc_ptr function nilfs2: move get block functions in bmap.c into btree codes nilfs2: remove nilfs_bmap_delete_block nilfs2: remove nilfs_bmap_put_block nilfs2: remove header file for segment list operations nilfs2: eliminate removal list of segments nilfs2: add sufile function that can modify multiple segment usages ...
| * nilfs2: use device's backing_dev_info for btree node cachesRyusuke Konishi2009-06-10
| | | | | | | | | | | | | | | | Previously, default_backing_dev_info was used for the mapping of btree node caches. This uses device dependent backing_dev_info to allow detailed control of the device for the btree node pages. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* | nilfs2: get rid of bd_mount_sem use from nilfsRyusuke Konishi2009-06-11
| | | | | | | | | | | | | | | | | | | | | | | | | | This will remove every bd_mount_sem use in nilfs. The intended exclusion control was replaced by the previous patch ("nilfs2: correct exclusion control in nilfs_remount function") for nilfs_remount(), and this patch will replace remains with a new mutex that this inserts in nilfs object. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Cc: Christoph Hellwig <hch@infradead.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | nilfs2: correct exclusion control in nilfs_remount functionRyusuke Konishi2009-06-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | nilfs_remount() changes mount state of a superblock instance. Even though nilfs accesses other superblock instances during mount or remount, the mount state was not properly protected in nilfs_remount(). Moreover, nilfs_remount() has a lock order reversal problem; nilfs_get_sb() holds: 1. bdev->bd_mount_sem 2. sb->s_umount (sget acquires) and nilfs_remount() holds: 1. sb->s_umount (locked by the caller in vfs) 2. bdev->bd_mount_sem To avoid these problems, this patch divides a semaphore protecting super block instances from nilfs->ns_sem, and applies it to the mount state protection in nilfs_remount(). With this change, bd_mount_sem use is removed from nilfs_remount() and the lock order reversal will be resolved. And the new rw-semaphore, nilfs->ns_super_sem will properly protect the mount state except the modification from nilfs_error function. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | nilfs2: simplify remaining sget() useRyusuke Konishi2009-06-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This simplifies the test function passed on the remaining sget() callsite in nilfs. Instead of checking mount type (i.e. ro-mount/rw-mount/snapshot mount) in the test function passed to sget(), this patch first looks up the nilfs_sb_info struct which the given mount type matches, and then acquires the super block instance holding the nilfs_sb_info. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | nilfs2: get rid of sget use for checking if current mount is presentRyusuke Konishi2009-06-11
| | | | | | | | | | | | | | | | | | | | This stops using sget() for checking if an r/w-mount or an r/o-mount exists on the device. This elimination uses a back pointer to the current mount added to nilfs object. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | nilfs2: get rid of sget use for acquiring nilfs objectRyusuke Konishi2009-06-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This will change the way to obtain nilfs object in nilfs_get_sb() function. Previously, a preliminary sget() call was performed, and the nilfs object was acquired from a super block instance found by the sget() call. This patch, instead, instroduces a new dedicated function find_or_create_nilfs(); as the name implies, the function finds an existent nilfs object from a global list or creates a new one if no object is found on the device. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | nilfs2: remove meaningless EBUSY case from nilfs_get_sb functionRyusuke Konishi2009-06-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The following EBUSY case in nilfs_get_sb() is meaningless. Indeed, this error code is never returned to the caller. if (!s->s_root) { ... } else if (!(s->s_flags & MS_RDONLY)) { err = -EBUSY; } This simply removes the else case. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | nilfs2: call nilfs2_write_super from nilfs2_sync_fsChristoph Hellwig2009-06-11
| | | | | | | | | | | | | | | | The call to ->write_super from __sync_filesystem will go away, so make sure nilfs2 performs the same actions from inside ->sync_fs. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | Push BKL down into ->remount_fs()Alessio Igor Bogani2009-06-11
| | | | | | | | | | | | | | [xfs, btrfs, capifs, shmem don't need BKL, exempt] Signed-off-by: Alessio Igor Bogani <abogani@texware.it> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | push BKL down into ->put_superChristoph Hellwig2009-06-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move BKL into ->put_super from the only caller. A couple of filesystems had trivial enough ->put_super (only kfree and NULLing of s_fs_info + stuff in there) to not get any locking: coda, cramfs, efs, hugetlbfs, omfs, qnx4, shmem, all others got the full treatment. Most of them probably don't need it, but I'd rather sort that out individually. Preferably after all the other BKL pushdowns in that area. [AV: original used to move lock_super() down as well; these changes are removed since we don't do lock_super() at all in generic_shutdown_super() now] [AV: fuse, btrfs and xfs are known to need no damn BKL, exempt] Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | remove ->write_super call in generic_shutdown_superChristoph Hellwig2009-06-11
|/ | | | | | | | | | | | | | | | | | | | | We just did a full fs writeout using sync_filesystem before, and if that's not enough for the filesystem it can perform it's own writeout in ->put_super, which many filesystems already do. Move a call to foofs_write_super into every foofs_put_super for now to guarantee identical behaviour until it's cleaned up by the individual filesystem maintainers. Exceptions: - affs already has identical copy & pasted code at the beginning of affs_put_super so no need to do it twice. - xfs does the right thing without it and I have changes pending for the xfs tree touching this are so I don't really need conflicts here.. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* nilfs2: remove module versionRyusuke Konishi2009-04-12
| | | | | | | | A MODULE_VERSION() macro has been used in out-of-tree nilfs modules, but it's needless and not updated in tree. So, this removes it along with the version declaration. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: return f_fsid for statfs2Ryusuke Konishi2009-04-12
| | | | | | | | This follows the change of Coly Li's series ("fs: return f_fsid for statfs(2)"), and make nilfs2 return f_fsid info for statfs(2). Acked-by: Coly Li <coly.li@suse.de> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: support nanosecond timestampRyusuke Konishi2009-04-07
| | | | | | | | | | | | | | | | | | | | After a review of user's feedback for finding out other compatibility issues, I found nilfs improperly initializes timestamps in inode; CURRENT_TIME was used there instead of CURRENT_TIME_SEC even though nilfs didn't have nanosecond timestamps on disk. A few users gave us the report that the tar program sometimes failed to expand symbolic links on nilfs, and it turned out to be the cause. Instead of applying the above displacement, I've decided to support nanosecond timestamps on this occation. Fortunetaly, a needless 64-bit field was in the nilfs_inode struct, and I found it's available for this purpose without impact for the users. So, this will do the enhancement and resolve the tar problem. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* nilfs2: introduce secondary super blockRyusuke Konishi2009-04-07
| | | | | | | | | | | | | | | | | | The former versions didn't have extra super blocks. This improves the weak point by introducing another super block at unused region in tail of the partition. This doesn't break disk format compatibility; older versions just ingore the secondary super block, and new versions just recover it if it doesn't exist. The partition created by an old mkfs may not have unused region, but in that case, the secondary super block will not be added. This doesn't make more redundant copies of the super block; it is a future work. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* nilfs2: simplify handling of active state of segmentsRyusuke Konishi2009-04-07
| | | | | | | | | | | | | | | | | | | will reduce some lines of segment constructor. Previously, the state was complexly controlled through a list of segments in order to keep consistency in meta data of usage state of segments. Instead, this presents ``calculated'' active flags to userland cleaner program and stop maintaining its real flag on disk. Only by this fake flag, the cleaner cannot exactly know if each segment is reclaimable or not. However, the recent extension of nilfs_sustat ioctl struct (nilfs2-extend-nilfs_sustat-ioctl-struct.patch) can prevent the cleaner from reclaiming in-use segment wrongly. So, now I can apply this for simplification. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* nilfs2: super block operations fix endian bugRyusuke Konishi2009-04-07
| | | | | | | | | | This adds a missing endian conversion of checksum field in the super block. This fixes compatibility issue on big endian machines which will come to surface after supporting recovery of super block. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* nilfs2: replace BUG_ON and BUG calls triggerable from ioctlRyusuke Konishi2009-04-07
| | | | | | | | | | | | | | | Pekka Enberg advised me: > It would be nice if BUG(), BUG_ON(), and panic() calls would be > converted to proper error handling using WARN_ON() calls. The BUG() > call in nilfs_cpfile_delete_checkpoints(), for example, looks to be > triggerable from user-space via the ioctl() system call. This will follow the comment and keep them to a minimum. Acked-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* nilfs2: extend nilfs_sustat ioctl structRyusuke Konishi2009-04-07
| | | | | | | | | | | | | | | | | This adds a new argument to the nilfs_sustat structure. The extended field allows to delete volatile active state of segments, which was needed to protect freshly-created segments from garbage collection but has confused code dealing with segments. This extension alleviates the mess and gives room for further simplifications. The volatile active flag is not persistent, so it's eliminable on this occasion without affecting compatibility other than the ioctl change. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* nilfs2: cleanup nilfs_clear_inodeRyusuke Konishi2009-04-07
| | | | | | | | | | | | | | | | | This will remove the following unnecessary locks and cleanup code in nilfs_clear_inode(): - unnecessary protection using nilfs_transaction_begin() and nilfs_transaction_end(). - cleanup code of i_dirty list field which is never chained when this function is called. - spinlock used when releasing i_bh field. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* nilfs2: super block operationsRyusuke Konishi2009-04-07
This adds super block operations for the nilfs2 file system. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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