1 /** mkquota.h 2 * 3 * Interface to the quota library. 4 * 5 * The quota library provides interface for creating and updating the quota 6 * files and the ext4 superblock fields. It supports the new VFS_V1 quota 7 * format. The quota library also provides support for keeping track of quotas 8 * in memory. 9 * The typical way to use the quota library is as follows: 10 * { 11 * quota_ctx_t qctx; 12 * 13 * quota_init_context(&qctx, fs, -1); 14 * { 15 * quota_compute_usage(qctx, -1); 16 * AND/OR 17 * quota_data_add/quota_data_sub/quota_data_inodes(); 18 * } 19 * quota_write_inode(qctx, USRQUOTA); 20 * quota_write_inode(qctx, GRPQUOTA); 21 * quota_release_context(&qctx); 22 * } 23 * 24 * This initial version does not support reading the quota files. This support 25 * will be added in near future. 26 * 27 * Aditya Kali <adityakali (at) google.com> 28 */ 29 30 #ifndef __QUOTA_QUOTAIO_H__ 31 #define __QUOTA_QUOTAIO_H__ 32 33 #include "ext2fs/ext2_fs.h" 34 #include "ext2fs/ext2fs.h" 35 #include "quotaio.h" 36 #include "../e2fsck/dict.h" 37 38 typedef struct quota_ctx *quota_ctx_t; 39 40 struct quota_ctx { 41 ext2_filsys fs; 42 dict_t *quota_dict[MAXQUOTAS]; 43 }; 44 45 /* In mkquota.c */ 46 errcode_t quota_init_context(quota_ctx_t *qctx, ext2_filsys fs, int qtype); 47 void quota_data_inodes(quota_ctx_t qctx, struct ext2_inode *inode, ext2_ino_t ino, 48 int adjust); 49 void quota_data_add(quota_ctx_t qctx, struct ext2_inode *inode, ext2_ino_t ino, 50 qsize_t space); 51 void quota_data_sub(quota_ctx_t qctx, struct ext2_inode *inode, ext2_ino_t ino, 52 qsize_t space); 53 errcode_t quota_write_inode(quota_ctx_t qctx, int qtype); 54 errcode_t quota_update_limits(quota_ctx_t qctx, ext2_ino_t qf_ino, int type); 55 errcode_t quota_compute_usage(quota_ctx_t qctx); 56 void quota_release_context(quota_ctx_t *qctx); 57 58 errcode_t quota_remove_inode(ext2_filsys fs, int qtype); 59 int quota_file_exists(ext2_filsys fs, int qtype, int fmt); 60 void quota_set_sb_inum(ext2_filsys fs, ext2_ino_t ino, int qtype); 61 errcode_t quota_compare_and_update(quota_ctx_t qctx, int qtype, 62 int *usage_inconsistent); 63 64 #endif /* __QUOTA_QUOTAIO_H__ */ 65
