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path: root/fs/nilfs2/sufile.h
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* nilfs2: get rid of NILFS_I_NILFSRyusuke Konishi2011-05-101-1/+1
| | | | | | | | | | | | | This replaces all references of NILFS_I_NILFS(inode)->ns_bdev with inode->i_sb->s_bdev and unfolds remaining uses of NILFS_I_NILFS inline function. Before 2.6.37, referring to a nilfs object from inodes needed a conditional judgement, and NILFS_I_NILFS was helpful to simplify it. But now we can simply do it by going through a super block instance like inode->i_sb->s_fs_info. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: implement resize ioctlRyusuke Konishi2011-05-101-0/+1
| | | | | | This adds resize ioctl which makes online resize possible. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: add ioctl which limits range of segment to be allocatedRyusuke Konishi2011-05-101-0/+1
| | | | | | | | | | | | | This adds a new ioctl command which limits range of segment to be allocated. This is intended to gather data whithin a range of the partition before shrinking the filesystem, or to control new log location for some purpose. If a range is specified by the ioctl, segment allocator of nilfs tries to allocate new segments from the range unless no free segments are available there. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: get rid of mi_nilfs back pointer to nilfs objectRyusuke Konishi2010-10-231-1/+1
| | | | | | | 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: use iget for all metadata filesRyusuke Konishi2010-10-231-2/+2
| | | | | | | 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: clean up get/put function of a segment usageRyusuke Konishi2009-11-201-5/+0
| | | | | | | This eliminates obsolete nilfs_get_sufile_get_segment_usage() and nilfs_set_sufile_segment_usage() from sufile. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: move routine to set segment usage into sufileRyusuke Konishi2009-11-201-0/+2
| | | | | | | This adds nilfs_sufile_set_segment_usage() function in sufile to replace direct access to the sufile metadata in log writer code. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: move routine marking segment usage dirty into sufileRyusuke Konishi2009-11-201-0/+1
| | | | | | | | | This adds nilfs_sufile_mark_dirty() function in sufile to replace nilfs_touch_segusage() function in log writer code. This is a preparation for the further cleanup which will move out low level sufile operations in the log writer. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: simplify nilfs_sufile_get_ncleansegs functionRyusuke Konishi2009-11-201-1/+2
| | | | | | | | | | | Previously, this function took an status code to return possible error codes. The ("nilfs2: add local variable to cache the number of clean segments") patch removed the possibility to return errors. So, this simplifies the function definition to make it directly return the number of clean segments. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: separate read method of meta data files on super root blockRyusuke Konishi2009-11-201-0/+1
| | | | | | | | | | Will displace nilfs_mdt_read_inode_direct function with an individual read method: nilfs_dat_read, nilfs_sufile_read, nilfs_cpfile_read. This provides the opportunity to initialize local variables of each metadata file after reading the inode. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: separate constructor of metadata filesRyusuke Konishi2009-11-201-0/+2
| | | | | | | | | | | 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: remove individual gfp constants for each metadata fileRyusuke Konishi2009-09-141-1/+0
| | | | | | | | 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: allow future expansion of metadata read out via get info ioctlRyusuke Konishi2009-06-101-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Nilfs has some ioctl commands to read out metadata from meta data files: - NILFS_IOCTL_GET_CPINFO for checkpoint file, - NILFS_IOCTL_GET_SUINFO for segment usage file, and - NILFS_IOCTL_GET_VINFO for Disk Address Transalation (DAT) file, respectively. Every routine on these metadata files is implemented so that it allows future expansion of on-disk format. But, the above ioctl commands do not support expansion even though nilfs_argv structure can handle arbitrary size for data exchanged via ioctl. This allows future expansion of the following structures which give basic format of the "get information" ioctls: - struct nilfs_cpinfo - struct nilfs_suinfo - struct nilfs_vinfo So, this introduces forward compatility of such ioctl commands. In this patch, a sanity check in nilfs_ioctl_get_info() function is changed to accept larger data structure [1], and metadata read routines are rewritten so that they become compatible for larger structures; the routines will just ignore the remaining fields which the current version of nilfs doesn't know. [1] The ioctl function already has another upper limit (PAGE_SIZE against a structure, which appears in nilfs_ioctl_wrap_copy function), and this will not cause security problem. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: eliminate removal list of segmentsRyusuke Konishi2009-06-101-22/+34
| | | | | | | | | | | | This will clean up the removal list of segments and the related functions from segment.c and ioctl.c, which have hurt code readability. This elimination is applied by using nilfs_sufile_updatev() previously introduced in the patch ("nilfs2: add sufile function that can modify multiple segment usages"). Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: add sufile function that can modify multiple segment usagesRyusuke Konishi2009-06-101-0/+4
| | | | | | | | | | This is a preparation for the later cleanup patch ("nilfs2: remove list of freeing segments"). This adds nilfs_sufile_updatev() to sufile, which can modify multiple segment usages at a time. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: fix possible mismatch of sufile counters on recoveryRyusuke Konishi2009-04-131-0/+12
| | | | | | | | | | | | | On-disk counters ndirtysegs and ncleansegs of sufile, can go wrong after roll-forward recovery because nilfs_prepare_segment_for_recovery() function marks segments dirty without adjusting value of these counters. This fixes the problem by adding a function to sufile which does the operation adjusting the counters, and by letting the recovery function use it. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: segment usage file cleanupsRyusuke Konishi2009-04-131-4/+63
| | | | | | | | | | | | | This will simplify sufile.c by sharing common code which repeatedly appears in routines updating a segment usage entry; a wrapper function nilfs_sufile_update() is introduced for the purpose, and counter modifications are integrated to a new function nilfs_sufile_mod_counter(). This is a preparation for the successive bugfix patch ("nilfs2: fix possible mismatch of sufile counters on recovery"). Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: segment usage fileKoji Sato2009-04-071-0/+54
This adds a meta data file which stores the allocation state of segments. [konishi.ryusuke@lab.ntt.co.jp: fix wrong counting of checkpoints and dirty segments] Signed-off-by: Koji Sato <sato.koji@lab.ntt.co.jp> 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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