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132 lines
4.2 KiB
132 lines
4.2 KiB
/* SPDX-License-Identifier: GPL-2.0+ */ |
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/* |
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* NILFS segment usage file. |
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* |
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* Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation. |
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* |
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* Written by Koji Sato. |
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*/ |
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#ifndef _NILFS_SUFILE_H |
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#define _NILFS_SUFILE_H |
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#include <linux/fs.h> |
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#include <linux/buffer_head.h> |
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#include "mdt.h" |
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static inline unsigned long nilfs_sufile_get_nsegments(struct inode *sufile) |
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{ |
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return ((struct the_nilfs *)sufile->i_sb->s_fs_info)->ns_nsegments; |
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} |
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unsigned long nilfs_sufile_get_ncleansegs(struct inode *sufile); |
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int nilfs_sufile_set_alloc_range(struct inode *sufile, __u64 start, __u64 end); |
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int nilfs_sufile_alloc(struct inode *, __u64 *); |
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int nilfs_sufile_mark_dirty(struct inode *sufile, __u64 segnum); |
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int nilfs_sufile_set_segment_usage(struct inode *sufile, __u64 segnum, |
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unsigned long nblocks, time64_t modtime); |
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int nilfs_sufile_get_stat(struct inode *, struct nilfs_sustat *); |
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ssize_t nilfs_sufile_get_suinfo(struct inode *, __u64, void *, unsigned int, |
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size_t); |
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ssize_t nilfs_sufile_set_suinfo(struct inode *, void *, unsigned int, size_t); |
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int nilfs_sufile_updatev(struct inode *, __u64 *, size_t, int, size_t *, |
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void (*dofunc)(struct inode *, __u64, |
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struct buffer_head *, |
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struct buffer_head *)); |
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int nilfs_sufile_update(struct inode *, __u64, int, |
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void (*dofunc)(struct inode *, __u64, |
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struct buffer_head *, |
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struct buffer_head *)); |
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void nilfs_sufile_do_scrap(struct inode *, __u64, struct buffer_head *, |
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struct buffer_head *); |
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void nilfs_sufile_do_free(struct inode *, __u64, struct buffer_head *, |
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struct buffer_head *); |
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void nilfs_sufile_do_cancel_free(struct inode *, __u64, struct buffer_head *, |
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struct buffer_head *); |
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void nilfs_sufile_do_set_error(struct inode *, __u64, struct buffer_head *, |
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struct buffer_head *); |
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int nilfs_sufile_resize(struct inode *sufile, __u64 newnsegs); |
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int nilfs_sufile_read(struct super_block *sb, size_t susize, |
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struct nilfs_inode *raw_inode, struct inode **inodep); |
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int nilfs_sufile_trim_fs(struct inode *sufile, struct fstrim_range *range); |
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/** |
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* nilfs_sufile_scrap - make a segment garbage |
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* @sufile: inode of segment usage file |
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* @segnum: segment number to be freed |
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*/ |
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static inline int nilfs_sufile_scrap(struct inode *sufile, __u64 segnum) |
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{ |
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return nilfs_sufile_update(sufile, segnum, 1, nilfs_sufile_do_scrap); |
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} |
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/** |
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* nilfs_sufile_free - free segment |
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* @sufile: inode of segment usage file |
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* @segnum: segment number to be freed |
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*/ |
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static inline int nilfs_sufile_free(struct inode *sufile, __u64 segnum) |
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{ |
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return nilfs_sufile_update(sufile, segnum, 0, nilfs_sufile_do_free); |
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} |
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/** |
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* nilfs_sufile_freev - free segments |
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* @sufile: inode of segment usage file |
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* @segnumv: array of segment numbers |
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* @nsegs: size of @segnumv array |
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* @ndone: place to store the number of freed segments |
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*/ |
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static inline int nilfs_sufile_freev(struct inode *sufile, __u64 *segnumv, |
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size_t nsegs, size_t *ndone) |
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{ |
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return nilfs_sufile_updatev(sufile, segnumv, nsegs, 0, ndone, |
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nilfs_sufile_do_free); |
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} |
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/** |
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* nilfs_sufile_cancel_freev - reallocate freeing segments |
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* @sufile: inode of segment usage file |
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* @segnumv: array of segment numbers |
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* @nsegs: size of @segnumv array |
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* @ndone: place to store the number of cancelled segments |
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* |
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* Return Value: On success, 0 is returned. On error, a negative error codes |
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* is returned. |
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*/ |
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static inline int nilfs_sufile_cancel_freev(struct inode *sufile, |
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__u64 *segnumv, size_t nsegs, |
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size_t *ndone) |
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{ |
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return nilfs_sufile_updatev(sufile, segnumv, nsegs, 0, ndone, |
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nilfs_sufile_do_cancel_free); |
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} |
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/** |
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* nilfs_sufile_set_error - mark a segment as erroneous |
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* @sufile: inode of segment usage file |
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* @segnum: segment number |
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* |
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* Description: nilfs_sufile_set_error() marks the segment specified by |
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* @segnum as erroneous. The error segment will never be used again. |
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* |
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* Return Value: On success, 0 is returned. On error, one of the following |
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* negative error codes is returned. |
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* |
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* %-EIO - I/O error. |
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* |
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* %-ENOMEM - Insufficient amount of memory available. |
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* |
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* %-EINVAL - Invalid segment usage number. |
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*/ |
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static inline int nilfs_sufile_set_error(struct inode *sufile, __u64 segnum) |
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{ |
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return nilfs_sufile_update(sufile, segnum, 0, |
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nilfs_sufile_do_set_error); |
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} |
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#endif /* _NILFS_SUFILE_H */
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