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* | nilfs2: use seq_puts to print mount options without argumentRyusuke Konishi2010-07-22
| | | | | | | | | | | | | | This replaces seq_printf() with seq_puts() in nilfs_show_options for mount options which have no argument. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* | nilfs2: add nodiscard mount optionRyusuke Konishi2010-07-22
| | | | | | | | | | | | | | | | | | | | Nilfs has "discard" mount option which issues discard/TRIM commands to underlying block device, but it lacks a complementary option and has no way to disable the feature through remount. This adds "nodiscard" option to resolve this imbalance. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* | nilfs2: add barrier mount optionRyusuke Konishi2010-07-22
| | | | | | | | | | | | | | | | | | | | Nilfs enables write barriers by default and has "nobarrier" mount option to disable this feature. But it lacks the complementary option and has no way to re-enable the feature on remount. This adds "barrier" option to resolve this imbalance. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* | nilfs2: sync super blocks in turnsJiro SEKIBA2010-07-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This will sync super blocks in turns instead of syncing duplicate super blocks at the time. This will help searching valid super root when super block is written into disk before log is written, which is happen when barrier-less block devices are unmounted uncleanly. In the situation, old super block likely points to valid log. This patch introduces ns_sbwcount member to the nilfs object and adds nilfs_sb_will_flip() function; ns_sbwcount counts how many times super blocks write back to the disk. And, nilfs_sb_will_flip() decides whether flipping required or not based on the count of ns_sbwcount to sync super blocks asymmetrically. The following functions are also changed: - nilfs_prepare_super(): flips super blocks according to the argument. The argument is calculated by nilfs_sb_will_flip() function. - nilfs_cleanup_super(): sets "clean" flag to both super blocks if they point to the same checkpoint. To update both of super block information, caller of nilfs_commit_super must set the information on both super blocks. Signed-off-by: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* | nilfs2: introduce nilfs_prepare_superJiro SEKIBA2010-07-22
| | | | | | | | | | | | | | | | | | | | This function checks validity of super block pointers. If first super block is invalid, it will swap the super blocks. The function should be called before any super block information updates. Caller must obtain nilfs->ns_sem. Signed-off-by: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* | nilfs2: separate function that updates log positionRyusuke Konishi2010-07-22
| | | | | | | | | | | | | | | | This moves out section that updates information of the recent log position stored in super blocks from nilfs_commit_super to a new routine named nilfs_set_log_cursor. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* | nilfs2: add nilfs_set_errorRyusuke Konishi2010-07-22
| | | | | | | | | | | | | | This function marks error state and write it on super blocks. This is a preparation for making super block writeback alternately. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* | nilfs2: add nilfs_cleanup_superRyusuke Konishi2010-07-22
| | | | | | | | | | | | | | | | | | This function write out filesystem state to super blocks in order to share the same cleanup work. This is a preparation for making super block writeback alternately. Cc: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* | nilfs2: do not update mount time on rw->ro remountRyusuke Konishi2010-07-22
|/ | | | | | | Mount time field in super block is wrongly updated when nilfs remounts the partition from read-write to read-only. This fixes the issue. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: fix style issue in nilfs_destroy_cachepRyusuke Konishi2010-05-31
| | | | | | | This gets rid of unwanted space chars in front of conditional sentences of nilfs_destroy_cachep(). Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: disallow remount of snapshot from/to a regular mountRyusuke Konishi2010-05-09
| | | | | | | | | | | | | | | | | | Snapshots and regular ro/rw mounts are essentially-different within the meaning whether the checkpoint is static or not and is marked with a snapshot flag or not. The current implemenation, however, allows to remount a snapshot to a regular rw-mount if the checkpoint number equals the latest one. This transition is actually impossible since changing a checkpoint to a snapshot makes another checkpoint, thus the condition is never satisfied. This fixes the weird state of affairs, and specifically separates snapshots and regular rw/ro-mounts. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: update comment on deactivate_super at nilfs_get_sbRyusuke Konishi2010-05-09
| | | | | | | deactivate_super was replaced with deactivate_locked_super, but the comment of nilfs_get_sb remain unchanged. This renews the comment. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: replace MS_VERBOSE with MS_SILENTRyusuke Konishi2010-05-09
| | | | | | | MS_VERBOSE is deprecated. This replaces it with MS_SILENT in reference to get_sb_bdev function. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: add missing initialization of s_modeRyusuke Konishi2010-05-09
| | | | | | | | | | | | An fmode_t argument is passed to kill_block_super() through s_mode member of the super_block structure. This is used to release the block device with the same mode, however, nilfs does not set s_mode anywhere. This modifies nilfs_get_sb function to properly initialize the s_mode member. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: fix misuse of open_bdev_exclusive/close_bdev_exclusiveRyusuke Konishi2010-05-09
| | | | | | | The second argument of open_bdev_exclusive/close_bdev_exclusive takes fmode_t flags instead of mount flags. This fixes the misuse. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: add missing endian conversion on super block magic numberRyusuke Konishi2010-05-09
| | | | | | | | | | | | This adds missing endian conversions in comparision of the magic number of super blocks. It was coincidence that prior versions didn't incur problems; the upper byte of the magic number happened to be equal to the lower byte. But, semantically it's wrong to depend on this. This won't change anything else nor suffer any compatibility issues. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: add a print message after loading nilfs2Li Hong2010-05-09
| | | | | | | | Printing a message after loading a file system is a practice. Add this to provide a better user-friendly experience. Signed-off-by: Li Hong <lihong.hi@gmail.com> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: cleanup multi kmem_cache_{create,destroy} codeLi Hong2010-05-09
| | | | | | | | | | | | | | | | | | This cleanup patch gives several improvements: - Moving all kmem_cache_{create_destroy} calls into one place, which removes some small function calls, cleans up error check code and clarify the logic. - Mark all initial code in __init section. - Remove some very obvious comments. - Adjust some declarations. - Fix some space-tab issues. Signed-off-by: Li Hong <lihong.hi@gmail.com> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: change default of 'errors' mount option to 'remount-ro' modeRyusuke Konishi2010-05-09
| | | | | | | | | | | | Like ext3, nilfs has 'errors' mount option to allow specifying desired behavior on severe errors. Currently, the default action is 'errors=continue' and has potential to advance filesystem corruption for severe errors. This will change the action to 'errors=remount-ro' to avoid the issue. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* 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>
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