11e51764aSArtem Bityutskiy /* 21e51764aSArtem Bityutskiy * This file is part of UBIFS. 31e51764aSArtem Bityutskiy * 41e51764aSArtem Bityutskiy * Copyright (C) 2006-2008 Nokia Corporation 51e51764aSArtem Bityutskiy * 61e51764aSArtem Bityutskiy * This program is free software; you can redistribute it and/or modify it 71e51764aSArtem Bityutskiy * under the terms of the GNU General Public License version 2 as published by 81e51764aSArtem Bityutskiy * the Free Software Foundation. 91e51764aSArtem Bityutskiy * 101e51764aSArtem Bityutskiy * This program is distributed in the hope that it will be useful, but WITHOUT 111e51764aSArtem Bityutskiy * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 121e51764aSArtem Bityutskiy * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 131e51764aSArtem Bityutskiy * more details. 141e51764aSArtem Bityutskiy * 151e51764aSArtem Bityutskiy * You should have received a copy of the GNU General Public License along with 161e51764aSArtem Bityutskiy * this program; if not, write to the Free Software Foundation, Inc., 51 171e51764aSArtem Bityutskiy * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 181e51764aSArtem Bityutskiy * 191e51764aSArtem Bityutskiy * Authors: Artem Bityutskiy (Битюцкий Артём) 201e51764aSArtem Bityutskiy * Adrian Hunter 211e51764aSArtem Bityutskiy */ 221e51764aSArtem Bityutskiy 231e51764aSArtem Bityutskiy #ifndef __UBIFS_H__ 241e51764aSArtem Bityutskiy #define __UBIFS_H__ 251e51764aSArtem Bityutskiy 261e51764aSArtem Bityutskiy #include <asm/div64.h> 271e51764aSArtem Bityutskiy #include <linux/statfs.h> 281e51764aSArtem Bityutskiy #include <linux/fs.h> 291e51764aSArtem Bityutskiy #include <linux/err.h> 301e51764aSArtem Bityutskiy #include <linux/sched.h> 315a0e3ad6STejun Heo #include <linux/slab.h> 321e51764aSArtem Bityutskiy #include <linux/vmalloc.h> 331e51764aSArtem Bityutskiy #include <linux/spinlock.h> 341e51764aSArtem Bityutskiy #include <linux/mutex.h> 351e51764aSArtem Bityutskiy #include <linux/rwsem.h> 361e51764aSArtem Bityutskiy #include <linux/mtd/ubi.h> 371e51764aSArtem Bityutskiy #include <linux/pagemap.h> 381e51764aSArtem Bityutskiy #include <linux/backing-dev.h> 39d7f0b70dSSubodh Nijsure #include <linux/security.h> 402b88fc21SAndreas Gruenbacher #include <linux/xattr.h> 41d475a507SRichard Weinberger #include <linux/fscrypto.h> 421e51764aSArtem Bityutskiy #include "ubifs-media.h" 431e51764aSArtem Bityutskiy 441e51764aSArtem Bityutskiy /* Version of this UBIFS implementation */ 451e51764aSArtem Bityutskiy #define UBIFS_VERSION 1 461e51764aSArtem Bityutskiy 471e51764aSArtem Bityutskiy /* UBIFS file system VFS magic number */ 481e51764aSArtem Bityutskiy #define UBIFS_SUPER_MAGIC 0x24051905 491e51764aSArtem Bityutskiy 501e51764aSArtem Bityutskiy /* Number of UBIFS blocks per VFS page */ 5109cbfeafSKirill A. Shutemov #define UBIFS_BLOCKS_PER_PAGE (PAGE_SIZE / UBIFS_BLOCK_SIZE) 5209cbfeafSKirill A. Shutemov #define UBIFS_BLOCKS_PER_PAGE_SHIFT (PAGE_SHIFT - UBIFS_BLOCK_SHIFT) 531e51764aSArtem Bityutskiy 541e51764aSArtem Bityutskiy /* "File system end of life" sequence number watermark */ 551e51764aSArtem Bityutskiy #define SQNUM_WARN_WATERMARK 0xFFFFFFFF00000000ULL 561e51764aSArtem Bityutskiy #define SQNUM_WATERMARK 0xFFFFFFFFFF000000ULL 571e51764aSArtem Bityutskiy 58af14a1adSArtem Bityutskiy /* 59af14a1adSArtem Bityutskiy * Minimum amount of LEBs reserved for the index. At present the index needs at 60af14a1adSArtem Bityutskiy * least 2 LEBs: one for the index head and one for in-the-gaps method (which 61af14a1adSArtem Bityutskiy * currently does not cater for the index head and so excludes it from 62af14a1adSArtem Bityutskiy * consideration). 63af14a1adSArtem Bityutskiy */ 64af14a1adSArtem Bityutskiy #define MIN_INDEX_LEBS 2 65af14a1adSArtem Bityutskiy 661e51764aSArtem Bityutskiy /* Minimum amount of data UBIFS writes to the flash */ 671e51764aSArtem Bityutskiy #define MIN_WRITE_SZ (UBIFS_DATA_NODE_SZ + 8) 681e51764aSArtem Bityutskiy 691e51764aSArtem Bityutskiy /* 701e51764aSArtem Bityutskiy * Currently we do not support inode number overlapping and re-using, so this 711e51764aSArtem Bityutskiy * watermark defines dangerous inode number level. This should be fixed later, 721e51764aSArtem Bityutskiy * although it is difficult to exceed current limit. Another option is to use 731e51764aSArtem Bityutskiy * 64-bit inode numbers, but this means more overhead. 741e51764aSArtem Bityutskiy */ 751e51764aSArtem Bityutskiy #define INUM_WARN_WATERMARK 0xFFF00000 761e51764aSArtem Bityutskiy #define INUM_WATERMARK 0xFFFFFF00 771e51764aSArtem Bityutskiy 781e51764aSArtem Bityutskiy /* Maximum number of entries in each LPT (LEB category) heap */ 791e51764aSArtem Bityutskiy #define LPT_HEAP_SZ 256 801e51764aSArtem Bityutskiy 811e51764aSArtem Bityutskiy /* 821e51764aSArtem Bityutskiy * Background thread name pattern. The numbers are UBI device and volume 831e51764aSArtem Bityutskiy * numbers. 841e51764aSArtem Bityutskiy */ 851e51764aSArtem Bityutskiy #define BGT_NAME_PATTERN "ubifs_bgt%d_%d" 861e51764aSArtem Bityutskiy 871e51764aSArtem Bityutskiy /* Maximum possible inode number (only 32-bit inodes are supported now) */ 881e51764aSArtem Bityutskiy #define MAX_INUM 0xFFFFFFFF 891e51764aSArtem Bityutskiy 901e51764aSArtem Bityutskiy /* Number of non-data journal heads */ 911e51764aSArtem Bityutskiy #define NONDATA_JHEADS_CNT 2 921e51764aSArtem Bityutskiy 93d6d14009SArtem Bityutskiy /* Shorter names for journal head numbers for internal usage */ 94d6d14009SArtem Bityutskiy #define GCHD UBIFS_GC_HEAD 95d6d14009SArtem Bityutskiy #define BASEHD UBIFS_BASE_HEAD 96d6d14009SArtem Bityutskiy #define DATAHD UBIFS_DATA_HEAD 971e51764aSArtem Bityutskiy 981e51764aSArtem Bityutskiy /* 'No change' value for 'ubifs_change_lp()' */ 991e51764aSArtem Bityutskiy #define LPROPS_NC 0x80000001 1001e51764aSArtem Bityutskiy 1011e51764aSArtem Bityutskiy /* 1021e51764aSArtem Bityutskiy * There is no notion of truncation key because truncation nodes do not exist 1031e51764aSArtem Bityutskiy * in TNC. However, when replaying, it is handy to introduce fake "truncation" 1041e51764aSArtem Bityutskiy * keys for truncation nodes because the code becomes simpler. So we define 1051e51764aSArtem Bityutskiy * %UBIFS_TRUN_KEY type. 106ba2f48f7SArtem Bityutskiy * 107ba2f48f7SArtem Bityutskiy * But otherwise, out of the journal reply scope, the truncation keys are 108ba2f48f7SArtem Bityutskiy * invalid. 1091e51764aSArtem Bityutskiy */ 1101e51764aSArtem Bityutskiy #define UBIFS_TRUN_KEY UBIFS_KEY_TYPES_CNT 111ba2f48f7SArtem Bityutskiy #define UBIFS_INVALID_KEY UBIFS_KEY_TYPES_CNT 1121e51764aSArtem Bityutskiy 1131e51764aSArtem Bityutskiy /* 1141e51764aSArtem Bityutskiy * How much a directory entry/extended attribute entry adds to the parent/host 1151e51764aSArtem Bityutskiy * inode. 1161e51764aSArtem Bityutskiy */ 1171e51764aSArtem Bityutskiy #define CALC_DENT_SIZE(name_len) ALIGN(UBIFS_DENT_NODE_SZ + (name_len) + 1, 8) 1181e51764aSArtem Bityutskiy 1191e51764aSArtem Bityutskiy /* How much an extended attribute adds to the host inode */ 1201e51764aSArtem Bityutskiy #define CALC_XATTR_BYTES(data_len) ALIGN(UBIFS_INO_NODE_SZ + (data_len) + 1, 8) 1211e51764aSArtem Bityutskiy 1221e51764aSArtem Bityutskiy /* 1231e51764aSArtem Bityutskiy * Znodes which were not touched for 'OLD_ZNODE_AGE' seconds are considered 1241e51764aSArtem Bityutskiy * "old", and znode which were touched last 'YOUNG_ZNODE_AGE' seconds ago are 1251e51764aSArtem Bityutskiy * considered "young". This is used by shrinker when selecting znode to trim 1261e51764aSArtem Bityutskiy * off. 1271e51764aSArtem Bityutskiy */ 1281e51764aSArtem Bityutskiy #define OLD_ZNODE_AGE 20 1291e51764aSArtem Bityutskiy #define YOUNG_ZNODE_AGE 5 1301e51764aSArtem Bityutskiy 1311e51764aSArtem Bityutskiy /* 1321e51764aSArtem Bityutskiy * Some compressors, like LZO, may end up with more data then the input buffer. 1331e51764aSArtem Bityutskiy * So UBIFS always allocates larger output buffer, to be sure the compressor 1341e51764aSArtem Bityutskiy * will not corrupt memory in case of worst case compression. 1351e51764aSArtem Bityutskiy */ 1361e51764aSArtem Bityutskiy #define WORST_COMPR_FACTOR 2 1371e51764aSArtem Bityutskiy 138d882962fSMatthew L. Creech /* 139d3f9db00SYannick Guerrini * How much memory is needed for a buffer where we compress a data node. 140d882962fSMatthew L. Creech */ 141d882962fSMatthew L. Creech #define COMPRESSED_DATA_NODE_BUF_SZ \ 142d882962fSMatthew L. Creech (UBIFS_DATA_NODE_SZ + UBIFS_BLOCK_SIZE * WORST_COMPR_FACTOR) 143d882962fSMatthew L. Creech 1441e51764aSArtem Bityutskiy /* Maximum expected tree height for use by bottom_up_buf */ 1451e51764aSArtem Bityutskiy #define BOTTOM_UP_HEIGHT 64 1461e51764aSArtem Bityutskiy 1474793e7c5SAdrian Hunter /* Maximum number of data nodes to bulk-read */ 1484793e7c5SAdrian Hunter #define UBIFS_MAX_BULK_READ 32 1494793e7c5SAdrian Hunter 1501e51764aSArtem Bityutskiy /* 1511e51764aSArtem Bityutskiy * Lockdep classes for UBIFS inode @ui_mutex. 1521e51764aSArtem Bityutskiy */ 1531e51764aSArtem Bityutskiy enum { 1541e51764aSArtem Bityutskiy WB_MUTEX_1 = 0, 1551e51764aSArtem Bityutskiy WB_MUTEX_2 = 1, 1561e51764aSArtem Bityutskiy WB_MUTEX_3 = 2, 1579e0a1fffSRichard Weinberger WB_MUTEX_4 = 3, 1581e51764aSArtem Bityutskiy }; 1591e51764aSArtem Bityutskiy 1601e51764aSArtem Bityutskiy /* 1611e51764aSArtem Bityutskiy * Znode flags (actually, bit numbers which store the flags). 1621e51764aSArtem Bityutskiy * 1631e51764aSArtem Bityutskiy * DIRTY_ZNODE: znode is dirty 1641e51764aSArtem Bityutskiy * COW_ZNODE: znode is being committed and a new instance of this znode has to 1651e51764aSArtem Bityutskiy * be created before changing this znode 1661e51764aSArtem Bityutskiy * OBSOLETE_ZNODE: znode is obsolete, which means it was deleted, but it is 1671e51764aSArtem Bityutskiy * still in the commit list and the ongoing commit operation 1681e51764aSArtem Bityutskiy * will commit it, and delete this znode after it is done 1691e51764aSArtem Bityutskiy */ 1701e51764aSArtem Bityutskiy enum { 1711e51764aSArtem Bityutskiy DIRTY_ZNODE = 0, 1721e51764aSArtem Bityutskiy COW_ZNODE = 1, 1731e51764aSArtem Bityutskiy OBSOLETE_ZNODE = 2, 1741e51764aSArtem Bityutskiy }; 1751e51764aSArtem Bityutskiy 1761e51764aSArtem Bityutskiy /* 1771e51764aSArtem Bityutskiy * Commit states. 1781e51764aSArtem Bityutskiy * 1791e51764aSArtem Bityutskiy * COMMIT_RESTING: commit is not wanted 1801e51764aSArtem Bityutskiy * COMMIT_BACKGROUND: background commit has been requested 1811e51764aSArtem Bityutskiy * COMMIT_REQUIRED: commit is required 1821e51764aSArtem Bityutskiy * COMMIT_RUNNING_BACKGROUND: background commit is running 1831e51764aSArtem Bityutskiy * COMMIT_RUNNING_REQUIRED: commit is running and it is required 1841e51764aSArtem Bityutskiy * COMMIT_BROKEN: commit failed 1851e51764aSArtem Bityutskiy */ 1861e51764aSArtem Bityutskiy enum { 1871e51764aSArtem Bityutskiy COMMIT_RESTING = 0, 1881e51764aSArtem Bityutskiy COMMIT_BACKGROUND, 1891e51764aSArtem Bityutskiy COMMIT_REQUIRED, 1901e51764aSArtem Bityutskiy COMMIT_RUNNING_BACKGROUND, 1911e51764aSArtem Bityutskiy COMMIT_RUNNING_REQUIRED, 1921e51764aSArtem Bityutskiy COMMIT_BROKEN, 1931e51764aSArtem Bityutskiy }; 1941e51764aSArtem Bityutskiy 1951e51764aSArtem Bityutskiy /* 1961e51764aSArtem Bityutskiy * 'ubifs_scan_a_node()' return values. 1971e51764aSArtem Bityutskiy * 1981e51764aSArtem Bityutskiy * SCANNED_GARBAGE: scanned garbage 1991e51764aSArtem Bityutskiy * SCANNED_EMPTY_SPACE: scanned empty space 2001e51764aSArtem Bityutskiy * SCANNED_A_NODE: scanned a valid node 2011e51764aSArtem Bityutskiy * SCANNED_A_CORRUPT_NODE: scanned a corrupted node 2021e51764aSArtem Bityutskiy * SCANNED_A_BAD_PAD_NODE: scanned a padding node with invalid pad length 2031e51764aSArtem Bityutskiy * 2041e51764aSArtem Bityutskiy * Greater than zero means: 'scanned that number of padding bytes' 2051e51764aSArtem Bityutskiy */ 2061e51764aSArtem Bityutskiy enum { 2071e51764aSArtem Bityutskiy SCANNED_GARBAGE = 0, 2081e51764aSArtem Bityutskiy SCANNED_EMPTY_SPACE = -1, 2091e51764aSArtem Bityutskiy SCANNED_A_NODE = -2, 2101e51764aSArtem Bityutskiy SCANNED_A_CORRUPT_NODE = -3, 2111e51764aSArtem Bityutskiy SCANNED_A_BAD_PAD_NODE = -4, 2121e51764aSArtem Bityutskiy }; 2131e51764aSArtem Bityutskiy 2141e51764aSArtem Bityutskiy /* 2151e51764aSArtem Bityutskiy * LPT cnode flag bits. 2161e51764aSArtem Bityutskiy * 2171e51764aSArtem Bityutskiy * DIRTY_CNODE: cnode is dirty 2181e51764aSArtem Bityutskiy * OBSOLETE_CNODE: cnode is being committed and has been copied (or deleted), 2191e51764aSArtem Bityutskiy * so it can (and must) be freed when the commit is finished 22037662447SArtem Bityutskiy * COW_CNODE: cnode is being committed and must be copied before writing 2211e51764aSArtem Bityutskiy */ 2221e51764aSArtem Bityutskiy enum { 2231e51764aSArtem Bityutskiy DIRTY_CNODE = 0, 22437662447SArtem Bityutskiy OBSOLETE_CNODE = 1, 22537662447SArtem Bityutskiy COW_CNODE = 2, 2261e51764aSArtem Bityutskiy }; 2271e51764aSArtem Bityutskiy 2281e51764aSArtem Bityutskiy /* 2291e51764aSArtem Bityutskiy * Dirty flag bits (lpt_drty_flgs) for LPT special nodes. 2301e51764aSArtem Bityutskiy * 2311e51764aSArtem Bityutskiy * LTAB_DIRTY: ltab node is dirty 2321e51764aSArtem Bityutskiy * LSAVE_DIRTY: lsave node is dirty 2331e51764aSArtem Bityutskiy */ 2341e51764aSArtem Bityutskiy enum { 2351e51764aSArtem Bityutskiy LTAB_DIRTY = 1, 2361e51764aSArtem Bityutskiy LSAVE_DIRTY = 2, 2371e51764aSArtem Bityutskiy }; 2381e51764aSArtem Bityutskiy 2391e51764aSArtem Bityutskiy /* 2401e51764aSArtem Bityutskiy * Return codes used by the garbage collector. 2411e51764aSArtem Bityutskiy * @LEB_FREED: the logical eraseblock was freed and is ready to use 2421e51764aSArtem Bityutskiy * @LEB_FREED_IDX: indexing LEB was freed and can be used only after the commit 2431e51764aSArtem Bityutskiy * @LEB_RETAINED: the logical eraseblock was freed and retained for GC purposes 2441e51764aSArtem Bityutskiy */ 2451e51764aSArtem Bityutskiy enum { 2461e51764aSArtem Bityutskiy LEB_FREED, 2471e51764aSArtem Bityutskiy LEB_FREED_IDX, 2481e51764aSArtem Bityutskiy LEB_RETAINED, 2491e51764aSArtem Bityutskiy }; 2501e51764aSArtem Bityutskiy 2511e51764aSArtem Bityutskiy /** 2521e51764aSArtem Bityutskiy * struct ubifs_old_idx - index node obsoleted since last commit start. 2531e51764aSArtem Bityutskiy * @rb: rb-tree node 2541e51764aSArtem Bityutskiy * @lnum: LEB number of obsoleted index node 2551e51764aSArtem Bityutskiy * @offs: offset of obsoleted index node 2561e51764aSArtem Bityutskiy */ 2571e51764aSArtem Bityutskiy struct ubifs_old_idx { 2581e51764aSArtem Bityutskiy struct rb_node rb; 2591e51764aSArtem Bityutskiy int lnum; 2601e51764aSArtem Bityutskiy int offs; 2611e51764aSArtem Bityutskiy }; 2621e51764aSArtem Bityutskiy 2631e51764aSArtem Bityutskiy /* The below union makes it easier to deal with keys */ 2641e51764aSArtem Bityutskiy union ubifs_key { 2657ca58badSArtem Bityutskiy uint8_t u8[UBIFS_SK_LEN]; 2667ca58badSArtem Bityutskiy uint32_t u32[UBIFS_SK_LEN/4]; 2677ca58badSArtem Bityutskiy uint64_t u64[UBIFS_SK_LEN/8]; 2687ca58badSArtem Bityutskiy __le32 j32[UBIFS_SK_LEN/4]; 2691e51764aSArtem Bityutskiy }; 2701e51764aSArtem Bityutskiy 2711e51764aSArtem Bityutskiy /** 2721e51764aSArtem Bityutskiy * struct ubifs_scan_node - UBIFS scanned node information. 2731e51764aSArtem Bityutskiy * @list: list of scanned nodes 2741e51764aSArtem Bityutskiy * @key: key of node scanned (if it has one) 2751e51764aSArtem Bityutskiy * @sqnum: sequence number 2761e51764aSArtem Bityutskiy * @type: type of node scanned 2771e51764aSArtem Bityutskiy * @offs: offset with LEB of node scanned 2781e51764aSArtem Bityutskiy * @len: length of node scanned 2791e51764aSArtem Bityutskiy * @node: raw node 2801e51764aSArtem Bityutskiy */ 2811e51764aSArtem Bityutskiy struct ubifs_scan_node { 2821e51764aSArtem Bityutskiy struct list_head list; 2831e51764aSArtem Bityutskiy union ubifs_key key; 2841e51764aSArtem Bityutskiy unsigned long long sqnum; 2851e51764aSArtem Bityutskiy int type; 2861e51764aSArtem Bityutskiy int offs; 2871e51764aSArtem Bityutskiy int len; 2881e51764aSArtem Bityutskiy void *node; 2891e51764aSArtem Bityutskiy }; 2901e51764aSArtem Bityutskiy 2911e51764aSArtem Bityutskiy /** 2921e51764aSArtem Bityutskiy * struct ubifs_scan_leb - UBIFS scanned LEB information. 2931e51764aSArtem Bityutskiy * @lnum: logical eraseblock number 2941e51764aSArtem Bityutskiy * @nodes_cnt: number of nodes scanned 2951e51764aSArtem Bityutskiy * @nodes: list of struct ubifs_scan_node 2961e51764aSArtem Bityutskiy * @endpt: end point (and therefore the start of empty space) 2971e51764aSArtem Bityutskiy * @buf: buffer containing entire LEB scanned 2981e51764aSArtem Bityutskiy */ 2991e51764aSArtem Bityutskiy struct ubifs_scan_leb { 3001e51764aSArtem Bityutskiy int lnum; 3011e51764aSArtem Bityutskiy int nodes_cnt; 3021e51764aSArtem Bityutskiy struct list_head nodes; 3031e51764aSArtem Bityutskiy int endpt; 3041e51764aSArtem Bityutskiy void *buf; 3051e51764aSArtem Bityutskiy }; 3061e51764aSArtem Bityutskiy 3071e51764aSArtem Bityutskiy /** 3081e51764aSArtem Bityutskiy * struct ubifs_gced_idx_leb - garbage-collected indexing LEB. 3091e51764aSArtem Bityutskiy * @list: list 3101e51764aSArtem Bityutskiy * @lnum: LEB number 3111e51764aSArtem Bityutskiy * @unmap: OK to unmap this LEB 3121e51764aSArtem Bityutskiy * 3131e51764aSArtem Bityutskiy * This data structure is used to temporary store garbage-collected indexing 3141e51764aSArtem Bityutskiy * LEBs - they are not released immediately, but only after the next commit. 3151e51764aSArtem Bityutskiy * This is needed to guarantee recoverability. 3161e51764aSArtem Bityutskiy */ 3171e51764aSArtem Bityutskiy struct ubifs_gced_idx_leb { 3181e51764aSArtem Bityutskiy struct list_head list; 3191e51764aSArtem Bityutskiy int lnum; 3201e51764aSArtem Bityutskiy int unmap; 3211e51764aSArtem Bityutskiy }; 3221e51764aSArtem Bityutskiy 3231e51764aSArtem Bityutskiy /** 3241e51764aSArtem Bityutskiy * struct ubifs_inode - UBIFS in-memory inode description. 3251e51764aSArtem Bityutskiy * @vfs_inode: VFS inode description object 3261e51764aSArtem Bityutskiy * @creat_sqnum: sequence number at time of creation 327de94eb55SArtem Bityutskiy * @del_cmtno: commit number corresponding to the time the inode was deleted, 328de94eb55SArtem Bityutskiy * protected by @c->commit_sem; 3291e51764aSArtem Bityutskiy * @xattr_size: summarized size of all extended attributes in bytes 3301e51764aSArtem Bityutskiy * @xattr_cnt: count of extended attributes this inode has 3311e51764aSArtem Bityutskiy * @xattr_names: sum of lengths of all extended attribute names belonging to 3321e51764aSArtem Bityutskiy * this inode 3331e51764aSArtem Bityutskiy * @dirty: non-zero if the inode is dirty 3341e51764aSArtem Bityutskiy * @xattr: non-zero if this is an extended attribute inode 335625bf371SArtem Bityutskiy * @bulk_read: non-zero if bulk-read should be used 3361e51764aSArtem Bityutskiy * @ui_mutex: serializes inode write-back with the rest of VFS operations, 3374793e7c5SAdrian Hunter * serializes "clean <-> dirty" state changes, serializes bulk-read, 338ba60ecabSArtem Bityutskiy * protects @dirty, @bulk_read, @ui_size, and @xattr_size 3391e51764aSArtem Bityutskiy * @ui_lock: protects @synced_i_size 3401e51764aSArtem Bityutskiy * @synced_i_size: synchronized size of inode, i.e. the value of inode size 3411e51764aSArtem Bityutskiy * currently stored on the flash; used only for regular file 3421e51764aSArtem Bityutskiy * inodes 3431e51764aSArtem Bityutskiy * @ui_size: inode size used by UBIFS when writing to flash 3441e51764aSArtem Bityutskiy * @flags: inode flags (@UBIFS_COMPR_FL, etc) 3451e51764aSArtem Bityutskiy * @compr_type: default compression type used for this inode 3464793e7c5SAdrian Hunter * @last_page_read: page number of last page read (for bulk read) 3474793e7c5SAdrian Hunter * @read_in_a_row: number of consecutive pages read in a row (for bulk read) 3481e51764aSArtem Bityutskiy * @data_len: length of the data attached to the inode 3491e51764aSArtem Bityutskiy * @data: inode's data 3501e51764aSArtem Bityutskiy * 3511e51764aSArtem Bityutskiy * @ui_mutex exists for two main reasons. At first it prevents inodes from 3521e51764aSArtem Bityutskiy * being written back while UBIFS changing them, being in the middle of an VFS 3531e51764aSArtem Bityutskiy * operation. This way UBIFS makes sure the inode fields are consistent. For 3541e51764aSArtem Bityutskiy * example, in 'ubifs_rename()' we change 3 inodes simultaneously, and 3551e51764aSArtem Bityutskiy * write-back must not write any of them before we have finished. 3561e51764aSArtem Bityutskiy * 3571e51764aSArtem Bityutskiy * The second reason is budgeting - UBIFS has to budget all operations. If an 3581e51764aSArtem Bityutskiy * operation is going to mark an inode dirty, it has to allocate budget for 3591e51764aSArtem Bityutskiy * this. It cannot just mark it dirty because there is no guarantee there will 3601e51764aSArtem Bityutskiy * be enough flash space to write the inode back later. This means UBIFS has 3611e51764aSArtem Bityutskiy * to have full control over inode "clean <-> dirty" transitions (and pages 3621e51764aSArtem Bityutskiy * actually). But unfortunately, VFS marks inodes dirty in many places, and it 3631e51764aSArtem Bityutskiy * does not ask the file-system if it is allowed to do so (there is a notifier, 3641e51764aSArtem Bityutskiy * but it is not enough), i.e., there is no mechanism to synchronize with this. 3651e51764aSArtem Bityutskiy * So UBIFS has its own inode dirty flag and its own mutex to serialize 3661e51764aSArtem Bityutskiy * "clean <-> dirty" transitions. 3671e51764aSArtem Bityutskiy * 3681e51764aSArtem Bityutskiy * The @synced_i_size field is used to make sure we never write pages which are 3691e51764aSArtem Bityutskiy * beyond last synchronized inode size. See 'ubifs_writepage()' for more 3701e51764aSArtem Bityutskiy * information. 3711e51764aSArtem Bityutskiy * 3721e51764aSArtem Bityutskiy * The @ui_size is a "shadow" variable for @inode->i_size and UBIFS uses 3731e51764aSArtem Bityutskiy * @ui_size instead of @inode->i_size. The reason for this is that UBIFS cannot 3741e51764aSArtem Bityutskiy * make sure @inode->i_size is always changed under @ui_mutex, because it 375c4361570SArtem Bityutskiy * cannot call 'truncate_setsize()' with @ui_mutex locked, because it would 376c4361570SArtem Bityutskiy * deadlock with 'ubifs_writepage()' (see file.c). All the other inode fields 377c4361570SArtem Bityutskiy * are changed under @ui_mutex, so they do not need "shadow" fields. Note, one 3781e51764aSArtem Bityutskiy * could consider to rework locking and base it on "shadow" fields. 3791e51764aSArtem Bityutskiy */ 3801e51764aSArtem Bityutskiy struct ubifs_inode { 3811e51764aSArtem Bityutskiy struct inode vfs_inode; 3821e51764aSArtem Bityutskiy unsigned long long creat_sqnum; 383de94eb55SArtem Bityutskiy unsigned long long del_cmtno; 3841e51764aSArtem Bityutskiy unsigned int xattr_size; 3851e51764aSArtem Bityutskiy unsigned int xattr_cnt; 3861e51764aSArtem Bityutskiy unsigned int xattr_names; 3871e51764aSArtem Bityutskiy unsigned int dirty:1; 3881e51764aSArtem Bityutskiy unsigned int xattr:1; 389625bf371SArtem Bityutskiy unsigned int bulk_read:1; 390a1dc080cSArtem Bityutskiy unsigned int compr_type:2; 3911e51764aSArtem Bityutskiy struct mutex ui_mutex; 3921e51764aSArtem Bityutskiy spinlock_t ui_lock; 3931e51764aSArtem Bityutskiy loff_t synced_i_size; 3941e51764aSArtem Bityutskiy loff_t ui_size; 3951e51764aSArtem Bityutskiy int flags; 3964793e7c5SAdrian Hunter pgoff_t last_page_read; 3974793e7c5SAdrian Hunter pgoff_t read_in_a_row; 3981e51764aSArtem Bityutskiy int data_len; 3991e51764aSArtem Bityutskiy void *data; 4001e51764aSArtem Bityutskiy }; 4011e51764aSArtem Bityutskiy 4021e51764aSArtem Bityutskiy /** 4031e51764aSArtem Bityutskiy * struct ubifs_unclean_leb - records a LEB recovered under read-only mode. 4041e51764aSArtem Bityutskiy * @list: list 4051e51764aSArtem Bityutskiy * @lnum: LEB number of recovered LEB 4061e51764aSArtem Bityutskiy * @endpt: offset where recovery ended 4071e51764aSArtem Bityutskiy * 4081e51764aSArtem Bityutskiy * This structure records a LEB identified during recovery that needs to be 4091e51764aSArtem Bityutskiy * cleaned but was not because UBIFS was mounted read-only. The information 4101e51764aSArtem Bityutskiy * is used to clean the LEB when remounting to read-write mode. 4111e51764aSArtem Bityutskiy */ 4121e51764aSArtem Bityutskiy struct ubifs_unclean_leb { 4131e51764aSArtem Bityutskiy struct list_head list; 4141e51764aSArtem Bityutskiy int lnum; 4151e51764aSArtem Bityutskiy int endpt; 4161e51764aSArtem Bityutskiy }; 4171e51764aSArtem Bityutskiy 4181e51764aSArtem Bityutskiy /* 4191e51764aSArtem Bityutskiy * LEB properties flags. 4201e51764aSArtem Bityutskiy * 4211e51764aSArtem Bityutskiy * LPROPS_UNCAT: not categorized 4227078202eSArtem Bityutskiy * LPROPS_DIRTY: dirty > free, dirty >= @c->dead_wm, not index 42321a60258SArtem Bityutskiy * LPROPS_DIRTY_IDX: dirty + free > @c->min_idx_node_sze and index 4247078202eSArtem Bityutskiy * LPROPS_FREE: free > 0, dirty < @c->dead_wm, not empty, not index 4251e51764aSArtem Bityutskiy * LPROPS_HEAP_CNT: number of heaps used for storing categorized LEBs 4261e51764aSArtem Bityutskiy * LPROPS_EMPTY: LEB is empty, not taken 4271e51764aSArtem Bityutskiy * LPROPS_FREEABLE: free + dirty == leb_size, not index, not taken 4281e51764aSArtem Bityutskiy * LPROPS_FRDI_IDX: free + dirty == leb_size and index, may be taken 4291e51764aSArtem Bityutskiy * LPROPS_CAT_MASK: mask for the LEB categories above 4301e51764aSArtem Bityutskiy * LPROPS_TAKEN: LEB was taken (this flag is not saved on the media) 4311e51764aSArtem Bityutskiy * LPROPS_INDEX: LEB contains indexing nodes (this flag also exists on flash) 4321e51764aSArtem Bityutskiy */ 4331e51764aSArtem Bityutskiy enum { 4341e51764aSArtem Bityutskiy LPROPS_UNCAT = 0, 4351e51764aSArtem Bityutskiy LPROPS_DIRTY = 1, 4361e51764aSArtem Bityutskiy LPROPS_DIRTY_IDX = 2, 4371e51764aSArtem Bityutskiy LPROPS_FREE = 3, 4381e51764aSArtem Bityutskiy LPROPS_HEAP_CNT = 3, 4391e51764aSArtem Bityutskiy LPROPS_EMPTY = 4, 4401e51764aSArtem Bityutskiy LPROPS_FREEABLE = 5, 4411e51764aSArtem Bityutskiy LPROPS_FRDI_IDX = 6, 4421e51764aSArtem Bityutskiy LPROPS_CAT_MASK = 15, 4431e51764aSArtem Bityutskiy LPROPS_TAKEN = 16, 4441e51764aSArtem Bityutskiy LPROPS_INDEX = 32, 4451e51764aSArtem Bityutskiy }; 4461e51764aSArtem Bityutskiy 4471e51764aSArtem Bityutskiy /** 4481e51764aSArtem Bityutskiy * struct ubifs_lprops - logical eraseblock properties. 4491e51764aSArtem Bityutskiy * @free: amount of free space in bytes 4501e51764aSArtem Bityutskiy * @dirty: amount of dirty space in bytes 4511e51764aSArtem Bityutskiy * @flags: LEB properties flags (see above) 4521e51764aSArtem Bityutskiy * @lnum: LEB number 4531e51764aSArtem Bityutskiy * @list: list of same-category lprops (for LPROPS_EMPTY and LPROPS_FREEABLE) 4541e51764aSArtem Bityutskiy * @hpos: heap position in heap of same-category lprops (other categories) 4551e51764aSArtem Bityutskiy */ 4561e51764aSArtem Bityutskiy struct ubifs_lprops { 4571e51764aSArtem Bityutskiy int free; 4581e51764aSArtem Bityutskiy int dirty; 4591e51764aSArtem Bityutskiy int flags; 4601e51764aSArtem Bityutskiy int lnum; 4611e51764aSArtem Bityutskiy union { 4621e51764aSArtem Bityutskiy struct list_head list; 4631e51764aSArtem Bityutskiy int hpos; 4641e51764aSArtem Bityutskiy }; 4651e51764aSArtem Bityutskiy }; 4661e51764aSArtem Bityutskiy 4671e51764aSArtem Bityutskiy /** 4681e51764aSArtem Bityutskiy * struct ubifs_lpt_lprops - LPT logical eraseblock properties. 4691e51764aSArtem Bityutskiy * @free: amount of free space in bytes 4701e51764aSArtem Bityutskiy * @dirty: amount of dirty space in bytes 4711e51764aSArtem Bityutskiy * @tgc: trivial GC flag (1 => unmap after commit end) 4721e51764aSArtem Bityutskiy * @cmt: commit flag (1 => reserved for commit) 4731e51764aSArtem Bityutskiy */ 4741e51764aSArtem Bityutskiy struct ubifs_lpt_lprops { 4751e51764aSArtem Bityutskiy int free; 4761e51764aSArtem Bityutskiy int dirty; 4771e51764aSArtem Bityutskiy unsigned tgc:1; 4781e51764aSArtem Bityutskiy unsigned cmt:1; 4791e51764aSArtem Bityutskiy }; 4801e51764aSArtem Bityutskiy 4811e51764aSArtem Bityutskiy /** 4821e51764aSArtem Bityutskiy * struct ubifs_lp_stats - statistics of eraseblocks in the main area. 4831e51764aSArtem Bityutskiy * @empty_lebs: number of empty LEBs 4841e51764aSArtem Bityutskiy * @taken_empty_lebs: number of taken LEBs 4851e51764aSArtem Bityutskiy * @idx_lebs: number of indexing LEBs 486d3cf502bSArtem Bityutskiy * @total_free: total free space in bytes (includes all LEBs) 487d3cf502bSArtem Bityutskiy * @total_dirty: total dirty space in bytes (includes all LEBs) 488d3cf502bSArtem Bityutskiy * @total_used: total used space in bytes (does not include index LEBs) 489d3cf502bSArtem Bityutskiy * @total_dead: total dead space in bytes (does not include index LEBs) 490d3cf502bSArtem Bityutskiy * @total_dark: total dark space in bytes (does not include index LEBs) 4911e51764aSArtem Bityutskiy * 492d3cf502bSArtem Bityutskiy * The @taken_empty_lebs field counts the LEBs that are in the transient state 493d3cf502bSArtem Bityutskiy * of having been "taken" for use but not yet written to. @taken_empty_lebs is 494d3cf502bSArtem Bityutskiy * needed to account correctly for @gc_lnum, otherwise @empty_lebs could be 495d3cf502bSArtem Bityutskiy * used by itself (in which case 'unused_lebs' would be a better name). In the 496d3cf502bSArtem Bityutskiy * case of @gc_lnum, it is "taken" at mount time or whenever a LEB is retained 497d3cf502bSArtem Bityutskiy * by GC, but unlike other empty LEBs that are "taken", it may not be written 498d3cf502bSArtem Bityutskiy * straight away (i.e. before the next commit start or unmount), so either 499d3cf502bSArtem Bityutskiy * @gc_lnum must be specially accounted for, or the current approach followed 500d3cf502bSArtem Bityutskiy * i.e. count it under @taken_empty_lebs. 5011e51764aSArtem Bityutskiy * 502d3cf502bSArtem Bityutskiy * @empty_lebs includes @taken_empty_lebs. 503d3cf502bSArtem Bityutskiy * 504d3cf502bSArtem Bityutskiy * @total_used, @total_dead and @total_dark fields do not account indexing 505d3cf502bSArtem Bityutskiy * LEBs. 5061e51764aSArtem Bityutskiy */ 5071e51764aSArtem Bityutskiy struct ubifs_lp_stats { 5081e51764aSArtem Bityutskiy int empty_lebs; 5091e51764aSArtem Bityutskiy int taken_empty_lebs; 5101e51764aSArtem Bityutskiy int idx_lebs; 5111e51764aSArtem Bityutskiy long long total_free; 5121e51764aSArtem Bityutskiy long long total_dirty; 5131e51764aSArtem Bityutskiy long long total_used; 5141e51764aSArtem Bityutskiy long long total_dead; 5151e51764aSArtem Bityutskiy long long total_dark; 5161e51764aSArtem Bityutskiy }; 5171e51764aSArtem Bityutskiy 5181e51764aSArtem Bityutskiy struct ubifs_nnode; 5191e51764aSArtem Bityutskiy 5201e51764aSArtem Bityutskiy /** 5211e51764aSArtem Bityutskiy * struct ubifs_cnode - LEB Properties Tree common node. 5221e51764aSArtem Bityutskiy * @parent: parent nnode 5231e51764aSArtem Bityutskiy * @cnext: next cnode to commit 5241e51764aSArtem Bityutskiy * @flags: flags (%DIRTY_LPT_NODE or %OBSOLETE_LPT_NODE) 5251e51764aSArtem Bityutskiy * @iip: index in parent 5261e51764aSArtem Bityutskiy * @level: level in the tree (zero for pnodes, greater than zero for nnodes) 5271e51764aSArtem Bityutskiy * @num: node number 5281e51764aSArtem Bityutskiy */ 5291e51764aSArtem Bityutskiy struct ubifs_cnode { 5301e51764aSArtem Bityutskiy struct ubifs_nnode *parent; 5311e51764aSArtem Bityutskiy struct ubifs_cnode *cnext; 5321e51764aSArtem Bityutskiy unsigned long flags; 5331e51764aSArtem Bityutskiy int iip; 5341e51764aSArtem Bityutskiy int level; 5351e51764aSArtem Bityutskiy int num; 5361e51764aSArtem Bityutskiy }; 5371e51764aSArtem Bityutskiy 5381e51764aSArtem Bityutskiy /** 5391e51764aSArtem Bityutskiy * struct ubifs_pnode - LEB Properties Tree leaf node. 5401e51764aSArtem Bityutskiy * @parent: parent nnode 5411e51764aSArtem Bityutskiy * @cnext: next cnode to commit 5421e51764aSArtem Bityutskiy * @flags: flags (%DIRTY_LPT_NODE or %OBSOLETE_LPT_NODE) 5431e51764aSArtem Bityutskiy * @iip: index in parent 5441e51764aSArtem Bityutskiy * @level: level in the tree (always zero for pnodes) 5451e51764aSArtem Bityutskiy * @num: node number 5461e51764aSArtem Bityutskiy * @lprops: LEB properties array 5471e51764aSArtem Bityutskiy */ 5481e51764aSArtem Bityutskiy struct ubifs_pnode { 5491e51764aSArtem Bityutskiy struct ubifs_nnode *parent; 5501e51764aSArtem Bityutskiy struct ubifs_cnode *cnext; 5511e51764aSArtem Bityutskiy unsigned long flags; 5521e51764aSArtem Bityutskiy int iip; 5531e51764aSArtem Bityutskiy int level; 5541e51764aSArtem Bityutskiy int num; 5551e51764aSArtem Bityutskiy struct ubifs_lprops lprops[UBIFS_LPT_FANOUT]; 5561e51764aSArtem Bityutskiy }; 5571e51764aSArtem Bityutskiy 5581e51764aSArtem Bityutskiy /** 5591e51764aSArtem Bityutskiy * struct ubifs_nbranch - LEB Properties Tree internal node branch. 5601e51764aSArtem Bityutskiy * @lnum: LEB number of child 5611e51764aSArtem Bityutskiy * @offs: offset of child 5621e51764aSArtem Bityutskiy * @nnode: nnode child 5631e51764aSArtem Bityutskiy * @pnode: pnode child 5641e51764aSArtem Bityutskiy * @cnode: cnode child 5651e51764aSArtem Bityutskiy */ 5661e51764aSArtem Bityutskiy struct ubifs_nbranch { 5671e51764aSArtem Bityutskiy int lnum; 5681e51764aSArtem Bityutskiy int offs; 5691e51764aSArtem Bityutskiy union { 5701e51764aSArtem Bityutskiy struct ubifs_nnode *nnode; 5711e51764aSArtem Bityutskiy struct ubifs_pnode *pnode; 5721e51764aSArtem Bityutskiy struct ubifs_cnode *cnode; 5731e51764aSArtem Bityutskiy }; 5741e51764aSArtem Bityutskiy }; 5751e51764aSArtem Bityutskiy 5761e51764aSArtem Bityutskiy /** 5771e51764aSArtem Bityutskiy * struct ubifs_nnode - LEB Properties Tree internal node. 5781e51764aSArtem Bityutskiy * @parent: parent nnode 5791e51764aSArtem Bityutskiy * @cnext: next cnode to commit 5801e51764aSArtem Bityutskiy * @flags: flags (%DIRTY_LPT_NODE or %OBSOLETE_LPT_NODE) 5811e51764aSArtem Bityutskiy * @iip: index in parent 5821e51764aSArtem Bityutskiy * @level: level in the tree (always greater than zero for nnodes) 5831e51764aSArtem Bityutskiy * @num: node number 5841e51764aSArtem Bityutskiy * @nbranch: branches to child nodes 5851e51764aSArtem Bityutskiy */ 5861e51764aSArtem Bityutskiy struct ubifs_nnode { 5871e51764aSArtem Bityutskiy struct ubifs_nnode *parent; 5881e51764aSArtem Bityutskiy struct ubifs_cnode *cnext; 5891e51764aSArtem Bityutskiy unsigned long flags; 5901e51764aSArtem Bityutskiy int iip; 5911e51764aSArtem Bityutskiy int level; 5921e51764aSArtem Bityutskiy int num; 5931e51764aSArtem Bityutskiy struct ubifs_nbranch nbranch[UBIFS_LPT_FANOUT]; 5941e51764aSArtem Bityutskiy }; 5951e51764aSArtem Bityutskiy 5961e51764aSArtem Bityutskiy /** 5971e51764aSArtem Bityutskiy * struct ubifs_lpt_heap - heap of categorized lprops. 5981e51764aSArtem Bityutskiy * @arr: heap array 5991e51764aSArtem Bityutskiy * @cnt: number in heap 6001e51764aSArtem Bityutskiy * @max_cnt: maximum number allowed in heap 6011e51764aSArtem Bityutskiy * 6021e51764aSArtem Bityutskiy * There are %LPROPS_HEAP_CNT heaps. 6031e51764aSArtem Bityutskiy */ 6041e51764aSArtem Bityutskiy struct ubifs_lpt_heap { 6051e51764aSArtem Bityutskiy struct ubifs_lprops **arr; 6061e51764aSArtem Bityutskiy int cnt; 6071e51764aSArtem Bityutskiy int max_cnt; 6081e51764aSArtem Bityutskiy }; 6091e51764aSArtem Bityutskiy 6101e51764aSArtem Bityutskiy /* 6111e51764aSArtem Bityutskiy * Return codes for LPT scan callback function. 6121e51764aSArtem Bityutskiy * 6131e51764aSArtem Bityutskiy * LPT_SCAN_CONTINUE: continue scanning 6141e51764aSArtem Bityutskiy * LPT_SCAN_ADD: add the LEB properties scanned to the tree in memory 6151e51764aSArtem Bityutskiy * LPT_SCAN_STOP: stop scanning 6161e51764aSArtem Bityutskiy */ 6171e51764aSArtem Bityutskiy enum { 6181e51764aSArtem Bityutskiy LPT_SCAN_CONTINUE = 0, 6191e51764aSArtem Bityutskiy LPT_SCAN_ADD = 1, 6201e51764aSArtem Bityutskiy LPT_SCAN_STOP = 2, 6211e51764aSArtem Bityutskiy }; 6221e51764aSArtem Bityutskiy 6231e51764aSArtem Bityutskiy struct ubifs_info; 6241e51764aSArtem Bityutskiy 6251e51764aSArtem Bityutskiy /* Callback used by the 'ubifs_lpt_scan_nolock()' function */ 6261e51764aSArtem Bityutskiy typedef int (*ubifs_lpt_scan_callback)(struct ubifs_info *c, 6271e51764aSArtem Bityutskiy const struct ubifs_lprops *lprops, 6281e51764aSArtem Bityutskiy int in_tree, void *data); 6291e51764aSArtem Bityutskiy 6301e51764aSArtem Bityutskiy /** 6311e51764aSArtem Bityutskiy * struct ubifs_wbuf - UBIFS write-buffer. 6321e51764aSArtem Bityutskiy * @c: UBIFS file-system description object 6331e51764aSArtem Bityutskiy * @buf: write-buffer (of min. flash I/O unit size) 6341e51764aSArtem Bityutskiy * @lnum: logical eraseblock number the write-buffer points to 6351e51764aSArtem Bityutskiy * @offs: write-buffer offset in this logical eraseblock 6361e51764aSArtem Bityutskiy * @avail: number of bytes available in the write-buffer 6371e51764aSArtem Bityutskiy * @used: number of used bytes in the write-buffer 6383c89f396SArtem Bityutskiy * @size: write-buffer size (in [@c->min_io_size, @c->max_write_size] range) 6391e51764aSArtem Bityutskiy * @jhead: journal head the mutex belongs to (note, needed only to shut lockdep 6401e51764aSArtem Bityutskiy * up by 'mutex_lock_nested()). 6411e51764aSArtem Bityutskiy * @sync_callback: write-buffer synchronization callback 6421e51764aSArtem Bityutskiy * @io_mutex: serializes write-buffer I/O 6431e51764aSArtem Bityutskiy * @lock: serializes @buf, @lnum, @offs, @avail, @used, @next_ino and @inodes 6441e51764aSArtem Bityutskiy * fields 6451e51764aSArtem Bityutskiy * @timer: write-buffer timer 646681947d2SAdrian Hunter * @no_timer: non-zero if this write-buffer does not have a timer 647681947d2SAdrian Hunter * @need_sync: non-zero if the timer expired and the wbuf needs sync'ing 6481e51764aSArtem Bityutskiy * @next_ino: points to the next position of the following inode number 6491e51764aSArtem Bityutskiy * @inodes: stores the inode numbers of the nodes which are in wbuf 6501e51764aSArtem Bityutskiy * 6511e51764aSArtem Bityutskiy * The write-buffer synchronization callback is called when the write-buffer is 6521e51764aSArtem Bityutskiy * synchronized in order to notify how much space was wasted due to 6531e51764aSArtem Bityutskiy * write-buffer padding and how much free space is left in the LEB. 6541e51764aSArtem Bityutskiy * 6551e51764aSArtem Bityutskiy * Note: the fields @buf, @lnum, @offs, @avail and @used can be read under 6561e51764aSArtem Bityutskiy * spin-lock or mutex because they are written under both mutex and spin-lock. 6571e51764aSArtem Bityutskiy * @buf is appended to under mutex but overwritten under both mutex and 6581e51764aSArtem Bityutskiy * spin-lock. Thus the data between @buf and @buf + @used can be read under 6591e51764aSArtem Bityutskiy * spinlock. 6601e51764aSArtem Bityutskiy */ 6611e51764aSArtem Bityutskiy struct ubifs_wbuf { 6621e51764aSArtem Bityutskiy struct ubifs_info *c; 6631e51764aSArtem Bityutskiy void *buf; 6641e51764aSArtem Bityutskiy int lnum; 6651e51764aSArtem Bityutskiy int offs; 6661e51764aSArtem Bityutskiy int avail; 6671e51764aSArtem Bityutskiy int used; 6683c89f396SArtem Bityutskiy int size; 6691e51764aSArtem Bityutskiy int jhead; 6701e51764aSArtem Bityutskiy int (*sync_callback)(struct ubifs_info *c, int lnum, int free, int pad); 6711e51764aSArtem Bityutskiy struct mutex io_mutex; 6721e51764aSArtem Bityutskiy spinlock_t lock; 673f2c5dbd7SArtem Bityutskiy struct hrtimer timer; 6740b335b9dSArtem Bityutskiy unsigned int no_timer:1; 6750b335b9dSArtem Bityutskiy unsigned int need_sync:1; 6761e51764aSArtem Bityutskiy int next_ino; 6771e51764aSArtem Bityutskiy ino_t *inodes; 6781e51764aSArtem Bityutskiy }; 6791e51764aSArtem Bityutskiy 6801e51764aSArtem Bityutskiy /** 6811e51764aSArtem Bityutskiy * struct ubifs_bud - bud logical eraseblock. 6821e51764aSArtem Bityutskiy * @lnum: logical eraseblock number 6831e51764aSArtem Bityutskiy * @start: where the (uncommitted) bud data starts 6841e51764aSArtem Bityutskiy * @jhead: journal head number this bud belongs to 6851e51764aSArtem Bityutskiy * @list: link in the list buds belonging to the same journal head 6861e51764aSArtem Bityutskiy * @rb: link in the tree of all buds 6871e51764aSArtem Bityutskiy */ 6881e51764aSArtem Bityutskiy struct ubifs_bud { 6891e51764aSArtem Bityutskiy int lnum; 6901e51764aSArtem Bityutskiy int start; 6911e51764aSArtem Bityutskiy int jhead; 6921e51764aSArtem Bityutskiy struct list_head list; 6931e51764aSArtem Bityutskiy struct rb_node rb; 6941e51764aSArtem Bityutskiy }; 6951e51764aSArtem Bityutskiy 6961e51764aSArtem Bityutskiy /** 6971e51764aSArtem Bityutskiy * struct ubifs_jhead - journal head. 6981e51764aSArtem Bityutskiy * @wbuf: head's write-buffer 6991e51764aSArtem Bityutskiy * @buds_list: list of bud LEBs belonging to this journal head 7001a0b0699SArtem Bityutskiy * @grouped: non-zero if UBIFS groups nodes when writing to this journal head 7011e51764aSArtem Bityutskiy * 7021e51764aSArtem Bityutskiy * Note, the @buds list is protected by the @c->buds_lock. 7031e51764aSArtem Bityutskiy */ 7041e51764aSArtem Bityutskiy struct ubifs_jhead { 7051e51764aSArtem Bityutskiy struct ubifs_wbuf wbuf; 7061e51764aSArtem Bityutskiy struct list_head buds_list; 7071a0b0699SArtem Bityutskiy unsigned int grouped:1; 7081e51764aSArtem Bityutskiy }; 7091e51764aSArtem Bityutskiy 7101e51764aSArtem Bityutskiy /** 7111e51764aSArtem Bityutskiy * struct ubifs_zbranch - key/coordinate/length branch stored in znodes. 7121e51764aSArtem Bityutskiy * @key: key 7131e51764aSArtem Bityutskiy * @znode: znode address in memory 714be61678bSArtem Bityutskiy * @lnum: LEB number of the target node (indexing node or data node) 715be61678bSArtem Bityutskiy * @offs: target node offset within @lnum 7161e51764aSArtem Bityutskiy * @len: target node length 7171e51764aSArtem Bityutskiy */ 7181e51764aSArtem Bityutskiy struct ubifs_zbranch { 7191e51764aSArtem Bityutskiy union ubifs_key key; 7201e51764aSArtem Bityutskiy union { 7211e51764aSArtem Bityutskiy struct ubifs_znode *znode; 7221e51764aSArtem Bityutskiy void *leaf; 7231e51764aSArtem Bityutskiy }; 7241e51764aSArtem Bityutskiy int lnum; 7251e51764aSArtem Bityutskiy int offs; 7261e51764aSArtem Bityutskiy int len; 7271e51764aSArtem Bityutskiy }; 7281e51764aSArtem Bityutskiy 7291e51764aSArtem Bityutskiy /** 7301e51764aSArtem Bityutskiy * struct ubifs_znode - in-memory representation of an indexing node. 7311e51764aSArtem Bityutskiy * @parent: parent znode or NULL if it is the root 7321e51764aSArtem Bityutskiy * @cnext: next znode to commit 7331e51764aSArtem Bityutskiy * @flags: znode flags (%DIRTY_ZNODE, %COW_ZNODE or %OBSOLETE_ZNODE) 7341e51764aSArtem Bityutskiy * @time: last access time (seconds) 7351e51764aSArtem Bityutskiy * @level: level of the entry in the TNC tree 7361e51764aSArtem Bityutskiy * @child_cnt: count of child znodes 7371e51764aSArtem Bityutskiy * @iip: index in parent's zbranch array 7381e51764aSArtem Bityutskiy * @alt: lower bound of key range has altered i.e. child inserted at slot 0 7391e51764aSArtem Bityutskiy * @lnum: LEB number of the corresponding indexing node 7401e51764aSArtem Bityutskiy * @offs: offset of the corresponding indexing node 7411e51764aSArtem Bityutskiy * @len: length of the corresponding indexing node 7421e51764aSArtem Bityutskiy * @zbranch: array of znode branches (@c->fanout elements) 743f70b7e52SArtem Bityutskiy * 744f70b7e52SArtem Bityutskiy * Note! The @lnum, @offs, and @len fields are not really needed - we have them 745f70b7e52SArtem Bityutskiy * only for internal consistency check. They could be removed to save some RAM. 7461e51764aSArtem Bityutskiy */ 7471e51764aSArtem Bityutskiy struct ubifs_znode { 7481e51764aSArtem Bityutskiy struct ubifs_znode *parent; 7491e51764aSArtem Bityutskiy struct ubifs_znode *cnext; 7501e51764aSArtem Bityutskiy unsigned long flags; 7511e51764aSArtem Bityutskiy unsigned long time; 7521e51764aSArtem Bityutskiy int level; 7531e51764aSArtem Bityutskiy int child_cnt; 7541e51764aSArtem Bityutskiy int iip; 7551e51764aSArtem Bityutskiy int alt; 756f70b7e52SArtem Bityutskiy int lnum; 757f70b7e52SArtem Bityutskiy int offs; 758f70b7e52SArtem Bityutskiy int len; 7591e51764aSArtem Bityutskiy struct ubifs_zbranch zbranch[]; 7601e51764aSArtem Bityutskiy }; 7611e51764aSArtem Bityutskiy 7621e51764aSArtem Bityutskiy /** 76339ce81ceSArtem Bityutskiy * struct bu_info - bulk-read information. 7644793e7c5SAdrian Hunter * @key: first data node key 7654793e7c5SAdrian Hunter * @zbranch: zbranches of data nodes to bulk read 7664793e7c5SAdrian Hunter * @buf: buffer to read into 7674793e7c5SAdrian Hunter * @buf_len: buffer length 7684793e7c5SAdrian Hunter * @gc_seq: GC sequence number to detect races with GC 7694793e7c5SAdrian Hunter * @cnt: number of data nodes for bulk read 7704793e7c5SAdrian Hunter * @blk_cnt: number of data blocks including holes 7714793e7c5SAdrian Hunter * @oef: end of file reached 7724793e7c5SAdrian Hunter */ 7734793e7c5SAdrian Hunter struct bu_info { 7744793e7c5SAdrian Hunter union ubifs_key key; 7754793e7c5SAdrian Hunter struct ubifs_zbranch zbranch[UBIFS_MAX_BULK_READ]; 7764793e7c5SAdrian Hunter void *buf; 7774793e7c5SAdrian Hunter int buf_len; 7784793e7c5SAdrian Hunter int gc_seq; 7794793e7c5SAdrian Hunter int cnt; 7804793e7c5SAdrian Hunter int blk_cnt; 7814793e7c5SAdrian Hunter int eof; 7824793e7c5SAdrian Hunter }; 7834793e7c5SAdrian Hunter 7844793e7c5SAdrian Hunter /** 7851e51764aSArtem Bityutskiy * struct ubifs_node_range - node length range description data structure. 7861e51764aSArtem Bityutskiy * @len: fixed node length 7871e51764aSArtem Bityutskiy * @min_len: minimum possible node length 7881e51764aSArtem Bityutskiy * @max_len: maximum possible node length 7891e51764aSArtem Bityutskiy * 7901e51764aSArtem Bityutskiy * If @max_len is %0, the node has fixed length @len. 7911e51764aSArtem Bityutskiy */ 7921e51764aSArtem Bityutskiy struct ubifs_node_range { 7931e51764aSArtem Bityutskiy union { 7941e51764aSArtem Bityutskiy int len; 7951e51764aSArtem Bityutskiy int min_len; 7961e51764aSArtem Bityutskiy }; 7971e51764aSArtem Bityutskiy int max_len; 7981e51764aSArtem Bityutskiy }; 7991e51764aSArtem Bityutskiy 8001e51764aSArtem Bityutskiy /** 8011e51764aSArtem Bityutskiy * struct ubifs_compressor - UBIFS compressor description structure. 8021e51764aSArtem Bityutskiy * @compr_type: compressor type (%UBIFS_COMPR_LZO, etc) 8031e51764aSArtem Bityutskiy * @cc: cryptoapi compressor handle 8041e51764aSArtem Bityutskiy * @comp_mutex: mutex used during compression 8051e51764aSArtem Bityutskiy * @decomp_mutex: mutex used during decompression 8061e51764aSArtem Bityutskiy * @name: compressor name 8071e51764aSArtem Bityutskiy * @capi_name: cryptoapi compressor name 8081e51764aSArtem Bityutskiy */ 8091e51764aSArtem Bityutskiy struct ubifs_compressor { 8101e51764aSArtem Bityutskiy int compr_type; 8111e51764aSArtem Bityutskiy struct crypto_comp *cc; 8121e51764aSArtem Bityutskiy struct mutex *comp_mutex; 8131e51764aSArtem Bityutskiy struct mutex *decomp_mutex; 8141e51764aSArtem Bityutskiy const char *name; 8151e51764aSArtem Bityutskiy const char *capi_name; 8161e51764aSArtem Bityutskiy }; 8171e51764aSArtem Bityutskiy 8181e51764aSArtem Bityutskiy /** 8191e51764aSArtem Bityutskiy * struct ubifs_budget_req - budget requirements of an operation. 8201e51764aSArtem Bityutskiy * 821de94eb55SArtem Bityutskiy * @fast: non-zero if the budgeting should try to acquire budget quickly and 8221e51764aSArtem Bityutskiy * should not try to call write-back 8231e51764aSArtem Bityutskiy * @recalculate: non-zero if @idx_growth, @data_growth, and @dd_growth fields 8241e51764aSArtem Bityutskiy * have to be re-calculated 8251e51764aSArtem Bityutskiy * @new_page: non-zero if the operation adds a new page 8261e51764aSArtem Bityutskiy * @dirtied_page: non-zero if the operation makes a page dirty 8271e51764aSArtem Bityutskiy * @new_dent: non-zero if the operation adds a new directory entry 8281e51764aSArtem Bityutskiy * @mod_dent: non-zero if the operation removes or modifies an existing 8291e51764aSArtem Bityutskiy * directory entry 8301e51764aSArtem Bityutskiy * @new_ino: non-zero if the operation adds a new inode 8317d25b361SDongsheng Yang * @new_ino_d: how much data newly created inode contains 8321e51764aSArtem Bityutskiy * @dirtied_ino: how many inodes the operation makes dirty 8337d25b361SDongsheng Yang * @dirtied_ino_d: how much data dirtied inode contains 8341e51764aSArtem Bityutskiy * @idx_growth: how much the index will supposedly grow 8351e51764aSArtem Bityutskiy * @data_growth: how much new data the operation will supposedly add 8361e51764aSArtem Bityutskiy * @dd_growth: how much data that makes other data dirty the operation will 8371e51764aSArtem Bityutskiy * supposedly add 8381e51764aSArtem Bityutskiy * 8391e51764aSArtem Bityutskiy * @idx_growth, @data_growth and @dd_growth are not used in budget request. The 8401e51764aSArtem Bityutskiy * budgeting subsystem caches index and data growth values there to avoid 8411e51764aSArtem Bityutskiy * re-calculating them when the budget is released. However, if @idx_growth is 8421e51764aSArtem Bityutskiy * %-1, it is calculated by the release function using other fields. 8431e51764aSArtem Bityutskiy * 8441e51764aSArtem Bityutskiy * An inode may contain 4KiB of data at max., thus the widths of @new_ino_d 8451e51764aSArtem Bityutskiy * is 13 bits, and @dirtied_ino_d - 15, because up to 4 inodes may be made 8461e51764aSArtem Bityutskiy * dirty by the re-name operation. 847dab4b4d2SArtem Bityutskiy * 848dab4b4d2SArtem Bityutskiy * Note, UBIFS aligns node lengths to 8-bytes boundary, so the requester has to 849dab4b4d2SArtem Bityutskiy * make sure the amount of inode data which contribute to @new_ino_d and 850dab4b4d2SArtem Bityutskiy * @dirtied_ino_d fields are aligned. 8511e51764aSArtem Bityutskiy */ 8521e51764aSArtem Bityutskiy struct ubifs_budget_req { 8531e51764aSArtem Bityutskiy unsigned int fast:1; 8541e51764aSArtem Bityutskiy unsigned int recalculate:1; 855547000daSArtem Bityutskiy #ifndef UBIFS_DEBUG 8561e51764aSArtem Bityutskiy unsigned int new_page:1; 8571e51764aSArtem Bityutskiy unsigned int dirtied_page:1; 8581e51764aSArtem Bityutskiy unsigned int new_dent:1; 8591e51764aSArtem Bityutskiy unsigned int mod_dent:1; 8601e51764aSArtem Bityutskiy unsigned int new_ino:1; 8611e51764aSArtem Bityutskiy unsigned int new_ino_d:13; 8621e51764aSArtem Bityutskiy unsigned int dirtied_ino:4; 8631e51764aSArtem Bityutskiy unsigned int dirtied_ino_d:15; 8641e51764aSArtem Bityutskiy #else 8651e51764aSArtem Bityutskiy /* Not bit-fields to check for overflows */ 866547000daSArtem Bityutskiy unsigned int new_page; 867547000daSArtem Bityutskiy unsigned int dirtied_page; 868547000daSArtem Bityutskiy unsigned int new_dent; 869547000daSArtem Bityutskiy unsigned int mod_dent; 870547000daSArtem Bityutskiy unsigned int new_ino; 871547000daSArtem Bityutskiy unsigned int new_ino_d; 8721e51764aSArtem Bityutskiy unsigned int dirtied_ino; 8731e51764aSArtem Bityutskiy unsigned int dirtied_ino_d; 8741e51764aSArtem Bityutskiy #endif 8751e51764aSArtem Bityutskiy int idx_growth; 8761e51764aSArtem Bityutskiy int data_growth; 8771e51764aSArtem Bityutskiy int dd_growth; 8781e51764aSArtem Bityutskiy }; 8791e51764aSArtem Bityutskiy 8801e51764aSArtem Bityutskiy /** 8811e51764aSArtem Bityutskiy * struct ubifs_orphan - stores the inode number of an orphan. 8821e51764aSArtem Bityutskiy * @rb: rb-tree node of rb-tree of orphans sorted by inode number 8831e51764aSArtem Bityutskiy * @list: list head of list of orphans in order added 8841e51764aSArtem Bityutskiy * @new_list: list head of list of orphans added since the last commit 8851e51764aSArtem Bityutskiy * @cnext: next orphan to commit 8861e51764aSArtem Bityutskiy * @dnext: next orphan to delete 8871e51764aSArtem Bityutskiy * @inum: inode number 8881e51764aSArtem Bityutskiy * @new: %1 => added since the last commit, otherwise %0 8892928f0d0SAdam Thomas * @cmt: %1 => commit pending, otherwise %0 8908afd500cSAdam Thomas * @del: %1 => delete pending, otherwise %0 8911e51764aSArtem Bityutskiy */ 8921e51764aSArtem Bityutskiy struct ubifs_orphan { 8931e51764aSArtem Bityutskiy struct rb_node rb; 8941e51764aSArtem Bityutskiy struct list_head list; 8951e51764aSArtem Bityutskiy struct list_head new_list; 8961e51764aSArtem Bityutskiy struct ubifs_orphan *cnext; 8971e51764aSArtem Bityutskiy struct ubifs_orphan *dnext; 8981e51764aSArtem Bityutskiy ino_t inum; 8992928f0d0SAdam Thomas unsigned new:1; 9002928f0d0SAdam Thomas unsigned cmt:1; 9018afd500cSAdam Thomas unsigned del:1; 9021e51764aSArtem Bityutskiy }; 9031e51764aSArtem Bityutskiy 9041e51764aSArtem Bityutskiy /** 9051e51764aSArtem Bityutskiy * struct ubifs_mount_opts - UBIFS-specific mount options information. 9061e51764aSArtem Bityutskiy * @unmount_mode: selected unmount mode (%0 default, %1 normal, %2 fast) 907d3f9db00SYannick Guerrini * @bulk_read: enable/disable bulk-reads (%0 default, %1 disable, %2 enable) 908553dea4dSArtem Bityutskiy * @chk_data_crc: enable/disable CRC data checking when reading data nodes 909d3f9db00SYannick Guerrini * (%0 default, %1 disable, %2 enable) 910553dea4dSArtem Bityutskiy * @override_compr: override default compressor (%0 - do not override and use 911553dea4dSArtem Bityutskiy * superblock compressor, %1 - override and use compressor 912553dea4dSArtem Bityutskiy * specified in @compr_type) 913553dea4dSArtem Bityutskiy * @compr_type: compressor type to override the superblock compressor with 914553dea4dSArtem Bityutskiy * (%UBIFS_COMPR_NONE, etc) 9151e51764aSArtem Bityutskiy */ 9161e51764aSArtem Bityutskiy struct ubifs_mount_opts { 9171e51764aSArtem Bityutskiy unsigned int unmount_mode:2; 9184793e7c5SAdrian Hunter unsigned int bulk_read:2; 9192953e73fSAdrian Hunter unsigned int chk_data_crc:2; 920553dea4dSArtem Bityutskiy unsigned int override_compr:1; 921553dea4dSArtem Bityutskiy unsigned int compr_type:2; 9221e51764aSArtem Bityutskiy }; 9231e51764aSArtem Bityutskiy 924b137545cSArtem Bityutskiy /** 925b137545cSArtem Bityutskiy * struct ubifs_budg_info - UBIFS budgeting information. 926b137545cSArtem Bityutskiy * @idx_growth: amount of bytes budgeted for index growth 927b137545cSArtem Bityutskiy * @data_growth: amount of bytes budgeted for cached data 928b137545cSArtem Bityutskiy * @dd_growth: amount of bytes budgeted for cached data that will make 929b137545cSArtem Bityutskiy * other data dirty 930b137545cSArtem Bityutskiy * @uncommitted_idx: amount of bytes were budgeted for growth of the index, but 931b137545cSArtem Bityutskiy * which still have to be taken into account because the index 932b137545cSArtem Bityutskiy * has not been committed so far 933b137545cSArtem Bityutskiy * @old_idx_sz: size of index on flash 934b137545cSArtem Bityutskiy * @min_idx_lebs: minimum number of LEBs required for the index 935b137545cSArtem Bityutskiy * @nospace: non-zero if the file-system does not have flash space (used as 936b137545cSArtem Bityutskiy * optimization) 937b137545cSArtem Bityutskiy * @nospace_rp: the same as @nospace, but additionally means that even reserved 938b137545cSArtem Bityutskiy * pool is full 939d3f9db00SYannick Guerrini * @page_budget: budget for a page (constant, never changed after mount) 940d3f9db00SYannick Guerrini * @inode_budget: budget for an inode (constant, never changed after mount) 941d3f9db00SYannick Guerrini * @dent_budget: budget for a directory entry (constant, never changed after 942b137545cSArtem Bityutskiy * mount) 943b137545cSArtem Bityutskiy */ 944b137545cSArtem Bityutskiy struct ubifs_budg_info { 945b137545cSArtem Bityutskiy long long idx_growth; 946b137545cSArtem Bityutskiy long long data_growth; 947b137545cSArtem Bityutskiy long long dd_growth; 948b137545cSArtem Bityutskiy long long uncommitted_idx; 949b137545cSArtem Bityutskiy unsigned long long old_idx_sz; 950b137545cSArtem Bityutskiy int min_idx_lebs; 951b137545cSArtem Bityutskiy unsigned int nospace:1; 952b137545cSArtem Bityutskiy unsigned int nospace_rp:1; 953b137545cSArtem Bityutskiy int page_budget; 954b137545cSArtem Bityutskiy int inode_budget; 955b137545cSArtem Bityutskiy int dent_budget; 956b137545cSArtem Bityutskiy }; 957b137545cSArtem Bityutskiy 95817c2f9f8SArtem Bityutskiy struct ubifs_debug_info; 95917c2f9f8SArtem Bityutskiy 9601e51764aSArtem Bityutskiy /** 9611e51764aSArtem Bityutskiy * struct ubifs_info - UBIFS file-system description data structure 9621e51764aSArtem Bityutskiy * (per-superblock). 9631e51764aSArtem Bityutskiy * @vfs_sb: VFS @struct super_block object 964de94eb55SArtem Bityutskiy * @bdi: backing device info object to make VFS happy and disable read-ahead 9651e51764aSArtem Bityutskiy * 9661e51764aSArtem Bityutskiy * @highest_inum: highest used inode number 9671e51764aSArtem Bityutskiy * @max_sqnum: current global sequence number 968014eb04bSArtem Bityutskiy * @cmt_no: commit number of the last successfully completed commit, protected 969014eb04bSArtem Bityutskiy * by @commit_sem 97081ffa38eSAdrian Hunter * @cnt_lock: protects @highest_inum and @max_sqnum counters 9711e51764aSArtem Bityutskiy * @fmt_version: UBIFS on-flash format version 972963f0cf6SArtem Bityutskiy * @ro_compat_version: R/O compatibility version 9731e51764aSArtem Bityutskiy * @uuid: UUID from super block 9741e51764aSArtem Bityutskiy * 9751e51764aSArtem Bityutskiy * @lhead_lnum: log head logical eraseblock number 9761e51764aSArtem Bityutskiy * @lhead_offs: log head offset 9771e51764aSArtem Bityutskiy * @ltail_lnum: log tail logical eraseblock number (offset is always 0) 9781e51764aSArtem Bityutskiy * @log_mutex: protects the log, @lhead_lnum, @lhead_offs, @ltail_lnum, and 9791e51764aSArtem Bityutskiy * @bud_bytes 9801e51764aSArtem Bityutskiy * @min_log_bytes: minimum required number of bytes in the log 9811e51764aSArtem Bityutskiy * @cmt_bud_bytes: used during commit to temporarily amount of bytes in 9821e51764aSArtem Bityutskiy * committed buds 9831e51764aSArtem Bityutskiy * 9841e51764aSArtem Bityutskiy * @buds: tree of all buds indexed by bud LEB number 9851e51764aSArtem Bityutskiy * @bud_bytes: how many bytes of flash is used by buds 9861e51764aSArtem Bityutskiy * @buds_lock: protects the @buds tree, @bud_bytes, and per-journal head bud 9871e51764aSArtem Bityutskiy * lists 9881e51764aSArtem Bityutskiy * @jhead_cnt: count of journal heads 9891e51764aSArtem Bityutskiy * @jheads: journal heads (head zero is base head) 9901e51764aSArtem Bityutskiy * @max_bud_bytes: maximum number of bytes allowed in buds 9911e51764aSArtem Bityutskiy * @bg_bud_bytes: number of bud bytes when background commit is initiated 9921e51764aSArtem Bityutskiy * @old_buds: buds to be released after commit ends 9931e51764aSArtem Bityutskiy * @max_bud_cnt: maximum number of buds 9941e51764aSArtem Bityutskiy * 9951e51764aSArtem Bityutskiy * @commit_sem: synchronizes committer with other processes 9961e51764aSArtem Bityutskiy * @cmt_state: commit state 9971e51764aSArtem Bityutskiy * @cs_lock: commit state lock 9981e51764aSArtem Bityutskiy * @cmt_wq: wait queue to sleep on if the log is full and a commit is running 999625bf371SArtem Bityutskiy * 10001e51764aSArtem Bityutskiy * @big_lpt: flag that LPT is too big to write whole during commit 10019f58d350SMatthew L. Creech * @space_fixup: flag indicating that free space in LEBs needs to be cleaned up 1002625bf371SArtem Bityutskiy * @no_chk_data_crc: do not check CRCs when reading data nodes (except during 1003625bf371SArtem Bityutskiy * recovery) 1004625bf371SArtem Bityutskiy * @bulk_read: enable bulk-reads 1005a1dc080cSArtem Bityutskiy * @default_compr: default compression algorithm (%UBIFS_COMPR_LZO, etc) 1006963f0cf6SArtem Bityutskiy * @rw_incompat: the media is not R/W compatible 10071e51764aSArtem Bityutskiy * 10081e51764aSArtem Bityutskiy * @tnc_mutex: protects the Tree Node Cache (TNC), @zroot, @cnext, @enext, and 10091e51764aSArtem Bityutskiy * @calc_idx_sz 10101e51764aSArtem Bityutskiy * @zroot: zbranch which points to the root index node and znode 10111e51764aSArtem Bityutskiy * @cnext: next znode to commit 10121e51764aSArtem Bityutskiy * @enext: next znode to commit to empty space 10131e51764aSArtem Bityutskiy * @gap_lebs: array of LEBs used by the in-gaps commit method 10141e51764aSArtem Bityutskiy * @cbuf: commit buffer 10151e51764aSArtem Bityutskiy * @ileb_buf: buffer for commit in-the-gaps method 10161e51764aSArtem Bityutskiy * @ileb_len: length of data in ileb_buf 10171e51764aSArtem Bityutskiy * @ihead_lnum: LEB number of index head 10181e51764aSArtem Bityutskiy * @ihead_offs: offset of index head 10191e51764aSArtem Bityutskiy * @ilebs: pre-allocated index LEBs 10201e51764aSArtem Bityutskiy * @ileb_cnt: number of pre-allocated index LEBs 10211e51764aSArtem Bityutskiy * @ileb_nxt: next pre-allocated index LEBs 10221e51764aSArtem Bityutskiy * @old_idx: tree of index nodes obsoleted since the last commit start 10231e51764aSArtem Bityutskiy * @bottom_up_buf: a buffer which is used by 'dirty_cow_bottom_up()' in tnc.c 10241e51764aSArtem Bityutskiy * 10251e51764aSArtem Bityutskiy * @mst_node: master node 10261e51764aSArtem Bityutskiy * @mst_offs: offset of valid master node 10273477d204SArtem Bityutskiy * 10286c0c42cdSArtem Bityutskiy * @max_bu_buf_len: maximum bulk-read buffer length 10293477d204SArtem Bityutskiy * @bu_mutex: protects the pre-allocated bulk-read buffer and @c->bu 10303477d204SArtem Bityutskiy * @bu: pre-allocated bulk-read information 10311e51764aSArtem Bityutskiy * 1032d882962fSMatthew L. Creech * @write_reserve_mutex: protects @write_reserve_buf 1033d882962fSMatthew L. Creech * @write_reserve_buf: on the write path we allocate memory, which might 1034d882962fSMatthew L. Creech * sometimes be unavailable, in which case we use this 1035d882962fSMatthew L. Creech * write reserve buffer 1036d882962fSMatthew L. Creech * 10371e51764aSArtem Bityutskiy * @log_lebs: number of logical eraseblocks in the log 10381e51764aSArtem Bityutskiy * @log_bytes: log size in bytes 10391e51764aSArtem Bityutskiy * @log_last: last LEB of the log 10401e51764aSArtem Bityutskiy * @lpt_lebs: number of LEBs used for lprops table 10411e51764aSArtem Bityutskiy * @lpt_first: first LEB of the lprops table area 10421e51764aSArtem Bityutskiy * @lpt_last: last LEB of the lprops table area 10431e51764aSArtem Bityutskiy * @orph_lebs: number of LEBs used for the orphan area 10441e51764aSArtem Bityutskiy * @orph_first: first LEB of the orphan area 10451e51764aSArtem Bityutskiy * @orph_last: last LEB of the orphan area 10461e51764aSArtem Bityutskiy * @main_lebs: count of LEBs in the main area 10471e51764aSArtem Bityutskiy * @main_first: first LEB of the main area 10481e51764aSArtem Bityutskiy * @main_bytes: main area size in bytes 10491e51764aSArtem Bityutskiy * 10501e51764aSArtem Bityutskiy * @key_hash_type: type of the key hash 10511e51764aSArtem Bityutskiy * @key_hash: direntry key hash function 10521e51764aSArtem Bityutskiy * @key_fmt: key format 10531e51764aSArtem Bityutskiy * @key_len: key length 10541e51764aSArtem Bityutskiy * @fanout: fanout of the index tree (number of links per indexing node) 10551e51764aSArtem Bityutskiy * 10561e51764aSArtem Bityutskiy * @min_io_size: minimal input/output unit size 10571e51764aSArtem Bityutskiy * @min_io_shift: number of bits in @min_io_size minus one 10583e8e2e0cSArtem Bityutskiy * @max_write_size: maximum amount of bytes the underlying flash can write at a 10593e8e2e0cSArtem Bityutskiy * time (MTD write buffer size) 10603e8e2e0cSArtem Bityutskiy * @max_write_shift: number of bits in @max_write_size minus one 10611e51764aSArtem Bityutskiy * @leb_size: logical eraseblock size in bytes 1062ca2ec61dSArtem Bityutskiy * @leb_start: starting offset of logical eraseblocks within physical 1063ca2ec61dSArtem Bityutskiy * eraseblocks 10641e51764aSArtem Bityutskiy * @half_leb_size: half LEB size 1065fb1cd01aSArtem Bityutskiy * @idx_leb_size: how many bytes of an LEB are effectively available when it is 1066fb1cd01aSArtem Bityutskiy * used to store indexing nodes (@leb_size - @max_idx_node_sz) 10671e51764aSArtem Bityutskiy * @leb_cnt: count of logical eraseblocks 10681e51764aSArtem Bityutskiy * @max_leb_cnt: maximum count of logical eraseblocks 10691e51764aSArtem Bityutskiy * @old_leb_cnt: count of logical eraseblocks before re-size 10701e51764aSArtem Bityutskiy * @ro_media: the underlying UBI volume is read-only 10712ef13294SArtem Bityutskiy * @ro_mount: the file-system was mounted as read-only 10722680d722SArtem Bityutskiy * @ro_error: UBIFS switched to R/O mode because an error happened 10731e51764aSArtem Bityutskiy * 10741e51764aSArtem Bityutskiy * @dirty_pg_cnt: number of dirty pages (not used) 10751e51764aSArtem Bityutskiy * @dirty_zn_cnt: number of dirty znodes 10761e51764aSArtem Bityutskiy * @clean_zn_cnt: number of clean znodes 10771e51764aSArtem Bityutskiy * 1078b137545cSArtem Bityutskiy * @space_lock: protects @bi and @lst 1079b137545cSArtem Bityutskiy * @lst: lprops statistics 1080b137545cSArtem Bityutskiy * @bi: budgeting information 10811e51764aSArtem Bityutskiy * @calc_idx_sz: temporary variable which is used to calculate new index size 10821e51764aSArtem Bityutskiy * (contains accurate new index size at end of TNC commit start) 10831e51764aSArtem Bityutskiy * 10841e51764aSArtem Bityutskiy * @ref_node_alsz: size of the LEB reference node aligned to the min. flash 10851e51764aSArtem Bityutskiy * I/O unit 10861e51764aSArtem Bityutskiy * @mst_node_alsz: master node aligned size 10871e51764aSArtem Bityutskiy * @min_idx_node_sz: minimum indexing node aligned on 8-bytes boundary 10881e51764aSArtem Bityutskiy * @max_idx_node_sz: maximum indexing node aligned on 8-bytes boundary 10891e51764aSArtem Bityutskiy * @max_inode_sz: maximum possible inode size in bytes 10901e51764aSArtem Bityutskiy * @max_znode_sz: size of znode in bytes 10919bbb5726SArtem Bityutskiy * 10929bbb5726SArtem Bityutskiy * @leb_overhead: how many bytes are wasted in an LEB when it is filled with 10939bbb5726SArtem Bityutskiy * data nodes of maximum size - used in free space reporting 10941e51764aSArtem Bityutskiy * @dead_wm: LEB dead space watermark 10951e51764aSArtem Bityutskiy * @dark_wm: LEB dark space watermark 10961e51764aSArtem Bityutskiy * @block_cnt: count of 4KiB blocks on the FS 10971e51764aSArtem Bityutskiy * 10981e51764aSArtem Bityutskiy * @ranges: UBIFS node length ranges 10991e51764aSArtem Bityutskiy * @ubi: UBI volume descriptor 11001e51764aSArtem Bityutskiy * @di: UBI device information 11011e51764aSArtem Bityutskiy * @vi: UBI volume information 11021e51764aSArtem Bityutskiy * 11031e51764aSArtem Bityutskiy * @orph_tree: rb-tree of orphan inode numbers 11041e51764aSArtem Bityutskiy * @orph_list: list of orphan inode numbers in order added 11051e51764aSArtem Bityutskiy * @orph_new: list of orphan inode numbers added since last commit 11061e51764aSArtem Bityutskiy * @orph_cnext: next orphan to commit 11071e51764aSArtem Bityutskiy * @orph_dnext: next orphan to delete 11081e51764aSArtem Bityutskiy * @orphan_lock: lock for orph_tree and orph_new 11091e51764aSArtem Bityutskiy * @orph_buf: buffer for orphan nodes 11101e51764aSArtem Bityutskiy * @new_orphans: number of orphans since last commit 11111e51764aSArtem Bityutskiy * @cmt_orphans: number of orphans being committed 11121e51764aSArtem Bityutskiy * @tot_orphans: number of orphans in the rb_tree 11131e51764aSArtem Bityutskiy * @max_orphans: maximum number of orphans allowed 11141e51764aSArtem Bityutskiy * @ohead_lnum: orphan head LEB number 11151e51764aSArtem Bityutskiy * @ohead_offs: orphan head offset 11161e51764aSArtem Bityutskiy * @no_orphs: non-zero if there are no orphans 11171e51764aSArtem Bityutskiy * 11181e51764aSArtem Bityutskiy * @bgt: UBIFS background thread 11191e51764aSArtem Bityutskiy * @bgt_name: background thread name 11201e51764aSArtem Bityutskiy * @need_bgt: if background thread should run 11211e51764aSArtem Bityutskiy * @need_wbuf_sync: if write-buffers have to be synchronized 11221e51764aSArtem Bityutskiy * 11231e51764aSArtem Bityutskiy * @gc_lnum: LEB number used for garbage collection 11241e51764aSArtem Bityutskiy * @sbuf: a buffer of LEB size used by GC and replay for scanning 11251e51764aSArtem Bityutskiy * @idx_gc: list of index LEBs that have been garbage collected 11261e51764aSArtem Bityutskiy * @idx_gc_cnt: number of elements on the idx_gc list 1127601c0bc4SAdrian Hunter * @gc_seq: incremented for every non-index LEB garbage collected 1128601c0bc4SAdrian Hunter * @gced_lnum: last non-index LEB that was garbage collected 11291e51764aSArtem Bityutskiy * 11301e51764aSArtem Bityutskiy * @infos_list: links all 'ubifs_info' objects 11311e51764aSArtem Bityutskiy * @umount_mutex: serializes shrinker and un-mount 11321e51764aSArtem Bityutskiy * @shrinker_run_no: shrinker run number 11331e51764aSArtem Bityutskiy * 11341e51764aSArtem Bityutskiy * @space_bits: number of bits needed to record free or dirty space 11351e51764aSArtem Bityutskiy * @lpt_lnum_bits: number of bits needed to record a LEB number in the LPT 11361e51764aSArtem Bityutskiy * @lpt_offs_bits: number of bits needed to record an offset in the LPT 11371e51764aSArtem Bityutskiy * @lpt_spc_bits: number of bits needed to space in the LPT 11381e51764aSArtem Bityutskiy * @pcnt_bits: number of bits needed to record pnode or nnode number 11391e51764aSArtem Bityutskiy * @lnum_bits: number of bits needed to record LEB number 11401e51764aSArtem Bityutskiy * @nnode_sz: size of on-flash nnode 11411e51764aSArtem Bityutskiy * @pnode_sz: size of on-flash pnode 11421e51764aSArtem Bityutskiy * @ltab_sz: size of on-flash LPT lprops table 11431e51764aSArtem Bityutskiy * @lsave_sz: size of on-flash LPT save table 11441e51764aSArtem Bityutskiy * @pnode_cnt: number of pnodes 11451e51764aSArtem Bityutskiy * @nnode_cnt: number of nnodes 11461e51764aSArtem Bityutskiy * @lpt_hght: height of the LPT 11471e51764aSArtem Bityutskiy * @pnodes_have: number of pnodes in memory 11481e51764aSArtem Bityutskiy * 11491e51764aSArtem Bityutskiy * @lp_mutex: protects lprops table and all the other lprops-related fields 11501e51764aSArtem Bityutskiy * @lpt_lnum: LEB number of the root nnode of the LPT 11511e51764aSArtem Bityutskiy * @lpt_offs: offset of the root nnode of the LPT 11521e51764aSArtem Bityutskiy * @nhead_lnum: LEB number of LPT head 11531e51764aSArtem Bityutskiy * @nhead_offs: offset of LPT head 11541e51764aSArtem Bityutskiy * @lpt_drty_flgs: dirty flags for LPT special nodes e.g. ltab 11551e51764aSArtem Bityutskiy * @dirty_nn_cnt: number of dirty nnodes 11561e51764aSArtem Bityutskiy * @dirty_pn_cnt: number of dirty pnodes 115773944a6dSAdrian Hunter * @check_lpt_free: flag that indicates LPT GC may be needed 11581e51764aSArtem Bityutskiy * @lpt_sz: LPT size 11591e51764aSArtem Bityutskiy * @lpt_nod_buf: buffer for an on-flash nnode or pnode 11601e51764aSArtem Bityutskiy * @lpt_buf: buffer of LEB size used by LPT 11611e51764aSArtem Bityutskiy * @nroot: address in memory of the root nnode of the LPT 11621e51764aSArtem Bityutskiy * @lpt_cnext: next LPT node to commit 11631e51764aSArtem Bityutskiy * @lpt_heap: array of heaps of categorized lprops 11641e51764aSArtem Bityutskiy * @dirty_idx: a (reverse sorted) copy of the LPROPS_DIRTY_IDX heap as at 11651e51764aSArtem Bityutskiy * previous commit start 11661e51764aSArtem Bityutskiy * @uncat_list: list of un-categorized LEBs 11671e51764aSArtem Bityutskiy * @empty_list: list of empty LEBs 1168fb1cd01aSArtem Bityutskiy * @freeable_list: list of freeable non-index LEBs (free + dirty == @leb_size) 1169fb1cd01aSArtem Bityutskiy * @frdi_idx_list: list of freeable index LEBs (free + dirty == @leb_size) 11701e51764aSArtem Bityutskiy * @freeable_cnt: number of freeable LEBs in @freeable_list 117198a1eebdSArtem Bityutskiy * @in_a_category_cnt: count of lprops which are in a certain category, which 117298a1eebdSArtem Bityutskiy * basically meants that they were loaded from the flash 11731e51764aSArtem Bityutskiy * 11741e51764aSArtem Bityutskiy * @ltab_lnum: LEB number of LPT's own lprops table 11751e51764aSArtem Bityutskiy * @ltab_offs: offset of LPT's own lprops table 11761e51764aSArtem Bityutskiy * @ltab: LPT's own lprops table 11771e51764aSArtem Bityutskiy * @ltab_cmt: LPT's own lprops table (commit copy) 11781e51764aSArtem Bityutskiy * @lsave_cnt: number of LEB numbers in LPT's save table 11791e51764aSArtem Bityutskiy * @lsave_lnum: LEB number of LPT's save table 11801e51764aSArtem Bityutskiy * @lsave_offs: offset of LPT's save table 11811e51764aSArtem Bityutskiy * @lsave: LPT's save table 11821e51764aSArtem Bityutskiy * @lscan_lnum: LEB number of last LPT scan 11831e51764aSArtem Bityutskiy * 11841e51764aSArtem Bityutskiy * @rp_size: size of the reserved pool in bytes 11851e51764aSArtem Bityutskiy * @report_rp_size: size of the reserved pool reported to user-space 11861e51764aSArtem Bityutskiy * @rp_uid: reserved pool user ID 11871e51764aSArtem Bityutskiy * @rp_gid: reserved pool group ID 11881e51764aSArtem Bityutskiy * 1189d8cdda3eSArtem Bityutskiy * @empty: %1 if the UBI device is empty 1190d8cdda3eSArtem Bityutskiy * @need_recovery: %1 if the file-system needs recovery 1191d8cdda3eSArtem Bityutskiy * @replaying: %1 during journal replay 119218d1d7fbSArtem Bityutskiy * @mounting: %1 while mounting 119390bea5a3SDaniel Golle * @probing: %1 while attempting to mount if MS_SILENT mount flag is set 1194d8cdda3eSArtem Bityutskiy * @remounting_rw: %1 while re-mounting from R/O mode to R/W mode 11951e51764aSArtem Bityutskiy * @replay_list: temporary list used during journal replay 11961e51764aSArtem Bityutskiy * @replay_buds: list of buds to replay 11971e51764aSArtem Bityutskiy * @cs_sqnum: sequence number of first node in the log (commit start node) 11981e51764aSArtem Bityutskiy * @replay_sqnum: sequence number of node currently being replayed 11992ef13294SArtem Bityutskiy * @unclean_leb_list: LEBs to recover when re-mounting R/O mounted FS to R/W 12002ef13294SArtem Bityutskiy * mode 12012ef13294SArtem Bityutskiy * @rcvrd_mst_node: recovered master node to write when re-mounting R/O mounted 12022ef13294SArtem Bityutskiy * FS to R/W mode 12031e51764aSArtem Bityutskiy * @size_tree: inode size information for recovery 12041e51764aSArtem Bityutskiy * @mount_opts: UBIFS-specific mount options 12051e51764aSArtem Bityutskiy * 120617c2f9f8SArtem Bityutskiy * @dbg: debugging-related information 12071e51764aSArtem Bityutskiy */ 12081e51764aSArtem Bityutskiy struct ubifs_info { 12091e51764aSArtem Bityutskiy struct super_block *vfs_sb; 12101e51764aSArtem Bityutskiy struct backing_dev_info bdi; 12111e51764aSArtem Bityutskiy 12121e51764aSArtem Bityutskiy ino_t highest_inum; 12131e51764aSArtem Bityutskiy unsigned long long max_sqnum; 12141e51764aSArtem Bityutskiy unsigned long long cmt_no; 12151e51764aSArtem Bityutskiy spinlock_t cnt_lock; 12161e51764aSArtem Bityutskiy int fmt_version; 1217963f0cf6SArtem Bityutskiy int ro_compat_version; 12181e51764aSArtem Bityutskiy unsigned char uuid[16]; 12191e51764aSArtem Bityutskiy 12201e51764aSArtem Bityutskiy int lhead_lnum; 12211e51764aSArtem Bityutskiy int lhead_offs; 12221e51764aSArtem Bityutskiy int ltail_lnum; 12231e51764aSArtem Bityutskiy struct mutex log_mutex; 12241e51764aSArtem Bityutskiy int min_log_bytes; 12251e51764aSArtem Bityutskiy long long cmt_bud_bytes; 12261e51764aSArtem Bityutskiy 12271e51764aSArtem Bityutskiy struct rb_root buds; 12281e51764aSArtem Bityutskiy long long bud_bytes; 12291e51764aSArtem Bityutskiy spinlock_t buds_lock; 12301e51764aSArtem Bityutskiy int jhead_cnt; 12311e51764aSArtem Bityutskiy struct ubifs_jhead *jheads; 12321e51764aSArtem Bityutskiy long long max_bud_bytes; 12331e51764aSArtem Bityutskiy long long bg_bud_bytes; 12341e51764aSArtem Bityutskiy struct list_head old_buds; 12351e51764aSArtem Bityutskiy int max_bud_cnt; 12361e51764aSArtem Bityutskiy 12371e51764aSArtem Bityutskiy struct rw_semaphore commit_sem; 12381e51764aSArtem Bityutskiy int cmt_state; 12391e51764aSArtem Bityutskiy spinlock_t cs_lock; 12401e51764aSArtem Bityutskiy wait_queue_head_t cmt_wq; 1241625bf371SArtem Bityutskiy 12421e51764aSArtem Bityutskiy unsigned int big_lpt:1; 12439f58d350SMatthew L. Creech unsigned int space_fixup:1; 1244625bf371SArtem Bityutskiy unsigned int no_chk_data_crc:1; 1245625bf371SArtem Bityutskiy unsigned int bulk_read:1; 1246a1dc080cSArtem Bityutskiy unsigned int default_compr:2; 1247963f0cf6SArtem Bityutskiy unsigned int rw_incompat:1; 12481e51764aSArtem Bityutskiy 12491e51764aSArtem Bityutskiy struct mutex tnc_mutex; 12501e51764aSArtem Bityutskiy struct ubifs_zbranch zroot; 12511e51764aSArtem Bityutskiy struct ubifs_znode *cnext; 12521e51764aSArtem Bityutskiy struct ubifs_znode *enext; 12531e51764aSArtem Bityutskiy int *gap_lebs; 12541e51764aSArtem Bityutskiy void *cbuf; 12551e51764aSArtem Bityutskiy void *ileb_buf; 12561e51764aSArtem Bityutskiy int ileb_len; 12571e51764aSArtem Bityutskiy int ihead_lnum; 12581e51764aSArtem Bityutskiy int ihead_offs; 12591e51764aSArtem Bityutskiy int *ilebs; 12601e51764aSArtem Bityutskiy int ileb_cnt; 12611e51764aSArtem Bityutskiy int ileb_nxt; 12621e51764aSArtem Bityutskiy struct rb_root old_idx; 12631e51764aSArtem Bityutskiy int *bottom_up_buf; 12641e51764aSArtem Bityutskiy 12651e51764aSArtem Bityutskiy struct ubifs_mst_node *mst_node; 12661e51764aSArtem Bityutskiy int mst_offs; 12673477d204SArtem Bityutskiy 12686c0c42cdSArtem Bityutskiy int max_bu_buf_len; 12693477d204SArtem Bityutskiy struct mutex bu_mutex; 12703477d204SArtem Bityutskiy struct bu_info bu; 12711e51764aSArtem Bityutskiy 1272d882962fSMatthew L. Creech struct mutex write_reserve_mutex; 1273d882962fSMatthew L. Creech void *write_reserve_buf; 1274d882962fSMatthew L. Creech 12751e51764aSArtem Bityutskiy int log_lebs; 12761e51764aSArtem Bityutskiy long long log_bytes; 12771e51764aSArtem Bityutskiy int log_last; 12781e51764aSArtem Bityutskiy int lpt_lebs; 12791e51764aSArtem Bityutskiy int lpt_first; 12801e51764aSArtem Bityutskiy int lpt_last; 12811e51764aSArtem Bityutskiy int orph_lebs; 12821e51764aSArtem Bityutskiy int orph_first; 12831e51764aSArtem Bityutskiy int orph_last; 12841e51764aSArtem Bityutskiy int main_lebs; 12851e51764aSArtem Bityutskiy int main_first; 12861e51764aSArtem Bityutskiy long long main_bytes; 12871e51764aSArtem Bityutskiy 12881e51764aSArtem Bityutskiy uint8_t key_hash_type; 12891e51764aSArtem Bityutskiy uint32_t (*key_hash)(const char *str, int len); 12901e51764aSArtem Bityutskiy int key_fmt; 12911e51764aSArtem Bityutskiy int key_len; 12921e51764aSArtem Bityutskiy int fanout; 12931e51764aSArtem Bityutskiy 12941e51764aSArtem Bityutskiy int min_io_size; 12951e51764aSArtem Bityutskiy int min_io_shift; 12963e8e2e0cSArtem Bityutskiy int max_write_size; 12973e8e2e0cSArtem Bityutskiy int max_write_shift; 12981e51764aSArtem Bityutskiy int leb_size; 1299ca2ec61dSArtem Bityutskiy int leb_start; 13001e51764aSArtem Bityutskiy int half_leb_size; 1301fb1cd01aSArtem Bityutskiy int idx_leb_size; 13021e51764aSArtem Bityutskiy int leb_cnt; 13031e51764aSArtem Bityutskiy int max_leb_cnt; 13041e51764aSArtem Bityutskiy int old_leb_cnt; 13052680d722SArtem Bityutskiy unsigned int ro_media:1; 13062ef13294SArtem Bityutskiy unsigned int ro_mount:1; 13072680d722SArtem Bityutskiy unsigned int ro_error:1; 13081e51764aSArtem Bityutskiy 13091e51764aSArtem Bityutskiy atomic_long_t dirty_pg_cnt; 13101e51764aSArtem Bityutskiy atomic_long_t dirty_zn_cnt; 13111e51764aSArtem Bityutskiy atomic_long_t clean_zn_cnt; 13121e51764aSArtem Bityutskiy 13131e51764aSArtem Bityutskiy spinlock_t space_lock; 13141e51764aSArtem Bityutskiy struct ubifs_lp_stats lst; 1315b137545cSArtem Bityutskiy struct ubifs_budg_info bi; 1316b137545cSArtem Bityutskiy unsigned long long calc_idx_sz; 13171e51764aSArtem Bityutskiy 13181e51764aSArtem Bityutskiy int ref_node_alsz; 13191e51764aSArtem Bityutskiy int mst_node_alsz; 13201e51764aSArtem Bityutskiy int min_idx_node_sz; 13211e51764aSArtem Bityutskiy int max_idx_node_sz; 13221e51764aSArtem Bityutskiy long long max_inode_sz; 13231e51764aSArtem Bityutskiy int max_znode_sz; 13249bbb5726SArtem Bityutskiy 13259bbb5726SArtem Bityutskiy int leb_overhead; 13261e51764aSArtem Bityutskiy int dead_wm; 13271e51764aSArtem Bityutskiy int dark_wm; 13281e51764aSArtem Bityutskiy int block_cnt; 13291e51764aSArtem Bityutskiy 13301e51764aSArtem Bityutskiy struct ubifs_node_range ranges[UBIFS_NODE_TYPES_CNT]; 13311e51764aSArtem Bityutskiy struct ubi_volume_desc *ubi; 13321e51764aSArtem Bityutskiy struct ubi_device_info di; 13331e51764aSArtem Bityutskiy struct ubi_volume_info vi; 13341e51764aSArtem Bityutskiy 13351e51764aSArtem Bityutskiy struct rb_root orph_tree; 13361e51764aSArtem Bityutskiy struct list_head orph_list; 13371e51764aSArtem Bityutskiy struct list_head orph_new; 13381e51764aSArtem Bityutskiy struct ubifs_orphan *orph_cnext; 13391e51764aSArtem Bityutskiy struct ubifs_orphan *orph_dnext; 13401e51764aSArtem Bityutskiy spinlock_t orphan_lock; 13411e51764aSArtem Bityutskiy void *orph_buf; 13421e51764aSArtem Bityutskiy int new_orphans; 13431e51764aSArtem Bityutskiy int cmt_orphans; 13441e51764aSArtem Bityutskiy int tot_orphans; 13451e51764aSArtem Bityutskiy int max_orphans; 13461e51764aSArtem Bityutskiy int ohead_lnum; 13471e51764aSArtem Bityutskiy int ohead_offs; 13481e51764aSArtem Bityutskiy int no_orphs; 13491e51764aSArtem Bityutskiy 13501e51764aSArtem Bityutskiy struct task_struct *bgt; 13511e51764aSArtem Bityutskiy char bgt_name[sizeof(BGT_NAME_PATTERN) + 9]; 13521e51764aSArtem Bityutskiy int need_bgt; 13531e51764aSArtem Bityutskiy int need_wbuf_sync; 13541e51764aSArtem Bityutskiy 13551e51764aSArtem Bityutskiy int gc_lnum; 13561e51764aSArtem Bityutskiy void *sbuf; 13571e51764aSArtem Bityutskiy struct list_head idx_gc; 13581e51764aSArtem Bityutskiy int idx_gc_cnt; 1359f92b9826SArtem Bityutskiy int gc_seq; 1360f92b9826SArtem Bityutskiy int gced_lnum; 13611e51764aSArtem Bityutskiy 13621e51764aSArtem Bityutskiy struct list_head infos_list; 13631e51764aSArtem Bityutskiy struct mutex umount_mutex; 13641e51764aSArtem Bityutskiy unsigned int shrinker_run_no; 13651e51764aSArtem Bityutskiy 13661e51764aSArtem Bityutskiy int space_bits; 13671e51764aSArtem Bityutskiy int lpt_lnum_bits; 13681e51764aSArtem Bityutskiy int lpt_offs_bits; 13691e51764aSArtem Bityutskiy int lpt_spc_bits; 13701e51764aSArtem Bityutskiy int pcnt_bits; 13711e51764aSArtem Bityutskiy int lnum_bits; 13721e51764aSArtem Bityutskiy int nnode_sz; 13731e51764aSArtem Bityutskiy int pnode_sz; 13741e51764aSArtem Bityutskiy int ltab_sz; 13751e51764aSArtem Bityutskiy int lsave_sz; 13761e51764aSArtem Bityutskiy int pnode_cnt; 13771e51764aSArtem Bityutskiy int nnode_cnt; 13781e51764aSArtem Bityutskiy int lpt_hght; 13791e51764aSArtem Bityutskiy int pnodes_have; 13801e51764aSArtem Bityutskiy 13811e51764aSArtem Bityutskiy struct mutex lp_mutex; 13821e51764aSArtem Bityutskiy int lpt_lnum; 13831e51764aSArtem Bityutskiy int lpt_offs; 13841e51764aSArtem Bityutskiy int nhead_lnum; 13851e51764aSArtem Bityutskiy int nhead_offs; 13861e51764aSArtem Bityutskiy int lpt_drty_flgs; 13871e51764aSArtem Bityutskiy int dirty_nn_cnt; 13881e51764aSArtem Bityutskiy int dirty_pn_cnt; 138973944a6dSAdrian Hunter int check_lpt_free; 13901e51764aSArtem Bityutskiy long long lpt_sz; 13911e51764aSArtem Bityutskiy void *lpt_nod_buf; 13921e51764aSArtem Bityutskiy void *lpt_buf; 13931e51764aSArtem Bityutskiy struct ubifs_nnode *nroot; 13941e51764aSArtem Bityutskiy struct ubifs_cnode *lpt_cnext; 13951e51764aSArtem Bityutskiy struct ubifs_lpt_heap lpt_heap[LPROPS_HEAP_CNT]; 13961e51764aSArtem Bityutskiy struct ubifs_lpt_heap dirty_idx; 13971e51764aSArtem Bityutskiy struct list_head uncat_list; 13981e51764aSArtem Bityutskiy struct list_head empty_list; 13991e51764aSArtem Bityutskiy struct list_head freeable_list; 14001e51764aSArtem Bityutskiy struct list_head frdi_idx_list; 14011e51764aSArtem Bityutskiy int freeable_cnt; 140298a1eebdSArtem Bityutskiy int in_a_category_cnt; 14031e51764aSArtem Bityutskiy 14041e51764aSArtem Bityutskiy int ltab_lnum; 14051e51764aSArtem Bityutskiy int ltab_offs; 14061e51764aSArtem Bityutskiy struct ubifs_lpt_lprops *ltab; 14071e51764aSArtem Bityutskiy struct ubifs_lpt_lprops *ltab_cmt; 14081e51764aSArtem Bityutskiy int lsave_cnt; 14091e51764aSArtem Bityutskiy int lsave_lnum; 14101e51764aSArtem Bityutskiy int lsave_offs; 14111e51764aSArtem Bityutskiy int *lsave; 14121e51764aSArtem Bityutskiy int lscan_lnum; 14131e51764aSArtem Bityutskiy 14141e51764aSArtem Bityutskiy long long rp_size; 14151e51764aSArtem Bityutskiy long long report_rp_size; 141639241bebSEric W. Biederman kuid_t rp_uid; 141739241bebSEric W. Biederman kgid_t rp_gid; 14181e51764aSArtem Bityutskiy 14191e51764aSArtem Bityutskiy /* The below fields are used only during mounting and re-mounting */ 1420d8cdda3eSArtem Bityutskiy unsigned int empty:1; 1421d8cdda3eSArtem Bityutskiy unsigned int need_recovery:1; 1422d8cdda3eSArtem Bityutskiy unsigned int replaying:1; 142318d1d7fbSArtem Bityutskiy unsigned int mounting:1; 1424d8cdda3eSArtem Bityutskiy unsigned int remounting_rw:1; 142590bea5a3SDaniel Golle unsigned int probing:1; 14261e51764aSArtem Bityutskiy struct list_head replay_list; 14271e51764aSArtem Bityutskiy struct list_head replay_buds; 14281e51764aSArtem Bityutskiy unsigned long long cs_sqnum; 14291e51764aSArtem Bityutskiy unsigned long long replay_sqnum; 14301e51764aSArtem Bityutskiy struct list_head unclean_leb_list; 14311e51764aSArtem Bityutskiy struct ubifs_mst_node *rcvrd_mst_node; 14321e51764aSArtem Bityutskiy struct rb_root size_tree; 14331e51764aSArtem Bityutskiy struct ubifs_mount_opts mount_opts; 14341e51764aSArtem Bityutskiy 143517c2f9f8SArtem Bityutskiy struct ubifs_debug_info *dbg; 14361e51764aSArtem Bityutskiy }; 14371e51764aSArtem Bityutskiy 14381e51764aSArtem Bityutskiy extern struct list_head ubifs_infos; 14391e51764aSArtem Bityutskiy extern spinlock_t ubifs_infos_lock; 14401e51764aSArtem Bityutskiy extern atomic_long_t ubifs_clean_zn_cnt; 14411e51764aSArtem Bityutskiy extern struct kmem_cache *ubifs_inode_slab; 1442e8b81566SArtem Bityutskiy extern const struct super_operations ubifs_super_operations; 1443e8b81566SArtem Bityutskiy extern const struct address_space_operations ubifs_file_address_operations; 1444e8b81566SArtem Bityutskiy extern const struct file_operations ubifs_file_operations; 1445e8b81566SArtem Bityutskiy extern const struct inode_operations ubifs_file_inode_operations; 1446e8b81566SArtem Bityutskiy extern const struct file_operations ubifs_dir_operations; 1447e8b81566SArtem Bityutskiy extern const struct inode_operations ubifs_dir_inode_operations; 1448e8b81566SArtem Bityutskiy extern const struct inode_operations ubifs_symlink_inode_operations; 14491e51764aSArtem Bityutskiy extern struct backing_dev_info ubifs_backing_dev_info; 14501e51764aSArtem Bityutskiy extern struct ubifs_compressor *ubifs_compressors[UBIFS_COMPR_TYPES_CNT]; 14511e51764aSArtem Bityutskiy 14521e51764aSArtem Bityutskiy /* io.c */ 1453ff46d7b3SAdrian Hunter void ubifs_ro_mode(struct ubifs_info *c, int err); 145483cef708SArtem Bityutskiy int ubifs_leb_read(const struct ubifs_info *c, int lnum, void *buf, int offs, 145583cef708SArtem Bityutskiy int len, int even_ebadmsg); 145683cef708SArtem Bityutskiy int ubifs_leb_write(struct ubifs_info *c, int lnum, const void *buf, int offs, 1457b36a261eSRichard Weinberger int len); 1458b36a261eSRichard Weinberger int ubifs_leb_change(struct ubifs_info *c, int lnum, const void *buf, int len); 145983cef708SArtem Bityutskiy int ubifs_leb_unmap(struct ubifs_info *c, int lnum); 1460b36a261eSRichard Weinberger int ubifs_leb_map(struct ubifs_info *c, int lnum); 146183cef708SArtem Bityutskiy int ubifs_is_mapped(const struct ubifs_info *c, int lnum); 14621e51764aSArtem Bityutskiy int ubifs_wbuf_write_nolock(struct ubifs_wbuf *wbuf, void *buf, int len); 1463b36a261eSRichard Weinberger int ubifs_wbuf_seek_nolock(struct ubifs_wbuf *wbuf, int lnum, int offs); 14641e51764aSArtem Bityutskiy int ubifs_wbuf_init(struct ubifs_info *c, struct ubifs_wbuf *wbuf); 14651e51764aSArtem Bityutskiy int ubifs_read_node(const struct ubifs_info *c, void *buf, int type, int len, 14661e51764aSArtem Bityutskiy int lnum, int offs); 14671e51764aSArtem Bityutskiy int ubifs_read_node_wbuf(struct ubifs_wbuf *wbuf, void *buf, int type, int len, 14681e51764aSArtem Bityutskiy int lnum, int offs); 14691e51764aSArtem Bityutskiy int ubifs_write_node(struct ubifs_info *c, void *node, int len, int lnum, 1470b36a261eSRichard Weinberger int offs); 14711e51764aSArtem Bityutskiy int ubifs_check_node(const struct ubifs_info *c, const void *buf, int lnum, 14726f7ab6d4SArtem Bityutskiy int offs, int quiet, int must_chk_crc); 14731e51764aSArtem Bityutskiy void ubifs_prepare_node(struct ubifs_info *c, void *buf, int len, int pad); 14741e51764aSArtem Bityutskiy void ubifs_prep_grp_node(struct ubifs_info *c, void *node, int len, int last); 14751e51764aSArtem Bityutskiy int ubifs_io_init(struct ubifs_info *c); 14761e51764aSArtem Bityutskiy void ubifs_pad(const struct ubifs_info *c, void *buf, int pad); 14771e51764aSArtem Bityutskiy int ubifs_wbuf_sync_nolock(struct ubifs_wbuf *wbuf); 14781e51764aSArtem Bityutskiy int ubifs_bg_wbufs_sync(struct ubifs_info *c); 14791e51764aSArtem Bityutskiy void ubifs_wbuf_add_ino_nolock(struct ubifs_wbuf *wbuf, ino_t inum); 14801e51764aSArtem Bityutskiy int ubifs_sync_wbufs_by_inode(struct ubifs_info *c, struct inode *inode); 14811e51764aSArtem Bityutskiy 14821e51764aSArtem Bityutskiy /* scan.c */ 14831e51764aSArtem Bityutskiy struct ubifs_scan_leb *ubifs_scan(const struct ubifs_info *c, int lnum, 1484348709baSArtem Bityutskiy int offs, void *sbuf, int quiet); 14851e51764aSArtem Bityutskiy void ubifs_scan_destroy(struct ubifs_scan_leb *sleb); 14861e51764aSArtem Bityutskiy int ubifs_scan_a_node(const struct ubifs_info *c, void *buf, int len, int lnum, 14871e51764aSArtem Bityutskiy int offs, int quiet); 14881e51764aSArtem Bityutskiy struct ubifs_scan_leb *ubifs_start_scan(const struct ubifs_info *c, int lnum, 14891e51764aSArtem Bityutskiy int offs, void *sbuf); 14901e51764aSArtem Bityutskiy void ubifs_end_scan(const struct ubifs_info *c, struct ubifs_scan_leb *sleb, 14911e51764aSArtem Bityutskiy int lnum, int offs); 14921e51764aSArtem Bityutskiy int ubifs_add_snod(const struct ubifs_info *c, struct ubifs_scan_leb *sleb, 14931e51764aSArtem Bityutskiy void *buf, int offs); 14941e51764aSArtem Bityutskiy void ubifs_scanned_corruption(const struct ubifs_info *c, int lnum, int offs, 14951e51764aSArtem Bityutskiy void *buf); 14961e51764aSArtem Bityutskiy 14971e51764aSArtem Bityutskiy /* log.c */ 14981e51764aSArtem Bityutskiy void ubifs_add_bud(struct ubifs_info *c, struct ubifs_bud *bud); 14991e51764aSArtem Bityutskiy void ubifs_create_buds_lists(struct ubifs_info *c); 15001e51764aSArtem Bityutskiy int ubifs_add_bud_to_log(struct ubifs_info *c, int jhead, int lnum, int offs); 15011e51764aSArtem Bityutskiy struct ubifs_bud *ubifs_search_bud(struct ubifs_info *c, int lnum); 15021e51764aSArtem Bityutskiy struct ubifs_wbuf *ubifs_get_wbuf(struct ubifs_info *c, int lnum); 15031e51764aSArtem Bityutskiy int ubifs_log_start_commit(struct ubifs_info *c, int *ltail_lnum); 15041e51764aSArtem Bityutskiy int ubifs_log_end_commit(struct ubifs_info *c, int new_ltail_lnum); 15051e51764aSArtem Bityutskiy int ubifs_log_post_commit(struct ubifs_info *c, int old_ltail_lnum); 15061e51764aSArtem Bityutskiy int ubifs_consolidate_log(struct ubifs_info *c); 15071e51764aSArtem Bityutskiy 15081e51764aSArtem Bityutskiy /* journal.c */ 15091e51764aSArtem Bityutskiy int ubifs_jnl_update(struct ubifs_info *c, const struct inode *dir, 15101e51764aSArtem Bityutskiy const struct qstr *nm, const struct inode *inode, 15111e51764aSArtem Bityutskiy int deletion, int xent); 15121e51764aSArtem Bityutskiy int ubifs_jnl_write_data(struct ubifs_info *c, const struct inode *inode, 15131e51764aSArtem Bityutskiy const union ubifs_key *key, const void *buf, int len); 15141f28681aSArtem Bityutskiy int ubifs_jnl_write_inode(struct ubifs_info *c, const struct inode *inode); 1515de94eb55SArtem Bityutskiy int ubifs_jnl_delete_inode(struct ubifs_info *c, const struct inode *inode); 15169ec64962SRichard Weinberger int ubifs_jnl_xrename(struct ubifs_info *c, const struct inode *fst_dir, 15179ec64962SRichard Weinberger const struct dentry *fst_dentry, 15189ec64962SRichard Weinberger const struct inode *snd_dir, 15199ec64962SRichard Weinberger const struct dentry *snd_dentry, int sync); 15201e51764aSArtem Bityutskiy int ubifs_jnl_rename(struct ubifs_info *c, const struct inode *old_dir, 15211e51764aSArtem Bityutskiy const struct dentry *old_dentry, 15221e51764aSArtem Bityutskiy const struct inode *new_dir, 15239e0a1fffSRichard Weinberger const struct dentry *new_dentry, 15249e0a1fffSRichard Weinberger const struct inode *whiteout, int sync); 15251e51764aSArtem Bityutskiy int ubifs_jnl_truncate(struct ubifs_info *c, const struct inode *inode, 15261e51764aSArtem Bityutskiy loff_t old_size, loff_t new_size); 15271e51764aSArtem Bityutskiy int ubifs_jnl_delete_xattr(struct ubifs_info *c, const struct inode *host, 15281e51764aSArtem Bityutskiy const struct inode *inode, const struct qstr *nm); 15291e51764aSArtem Bityutskiy int ubifs_jnl_change_xattr(struct ubifs_info *c, const struct inode *inode1, 15301e51764aSArtem Bityutskiy const struct inode *inode2); 15311e51764aSArtem Bityutskiy 15321e51764aSArtem Bityutskiy /* budget.c */ 15331e51764aSArtem Bityutskiy int ubifs_budget_space(struct ubifs_info *c, struct ubifs_budget_req *req); 15341e51764aSArtem Bityutskiy void ubifs_release_budget(struct ubifs_info *c, struct ubifs_budget_req *req); 15351e51764aSArtem Bityutskiy void ubifs_release_dirty_inode_budget(struct ubifs_info *c, 15361e51764aSArtem Bityutskiy struct ubifs_inode *ui); 15371e51764aSArtem Bityutskiy int ubifs_budget_inode_op(struct ubifs_info *c, struct inode *inode, 15381e51764aSArtem Bityutskiy struct ubifs_budget_req *req); 15391e51764aSArtem Bityutskiy void ubifs_release_ino_dirty(struct ubifs_info *c, struct inode *inode, 15401e51764aSArtem Bityutskiy struct ubifs_budget_req *req); 15411e51764aSArtem Bityutskiy void ubifs_cancel_ino_op(struct ubifs_info *c, struct inode *inode, 15421e51764aSArtem Bityutskiy struct ubifs_budget_req *req); 15437dad181bSArtem Bityutskiy long long ubifs_get_free_space(struct ubifs_info *c); 154484abf972SArtem Bityutskiy long long ubifs_get_free_space_nolock(struct ubifs_info *c); 15451e51764aSArtem Bityutskiy int ubifs_calc_min_idx_lebs(struct ubifs_info *c); 15461e51764aSArtem Bityutskiy void ubifs_convert_page_budget(struct ubifs_info *c); 15474d61db4fSArtem Bityutskiy long long ubifs_reported_space(const struct ubifs_info *c, long long free); 15481e51764aSArtem Bityutskiy long long ubifs_calc_available(const struct ubifs_info *c, int min_idx_lebs); 15491e51764aSArtem Bityutskiy 15501e51764aSArtem Bityutskiy /* find.c */ 15513edaae7cSArtem Bityutskiy int ubifs_find_free_space(struct ubifs_info *c, int min_space, int *offs, 15521e51764aSArtem Bityutskiy int squeeze); 15531e51764aSArtem Bityutskiy int ubifs_find_free_leb_for_idx(struct ubifs_info *c); 15541e51764aSArtem Bityutskiy int ubifs_find_dirty_leb(struct ubifs_info *c, struct ubifs_lprops *ret_lp, 15551e51764aSArtem Bityutskiy int min_space, int pick_free); 15561e51764aSArtem Bityutskiy int ubifs_find_dirty_idx_leb(struct ubifs_info *c); 15571e51764aSArtem Bityutskiy int ubifs_save_dirty_idx_lnums(struct ubifs_info *c); 15581e51764aSArtem Bityutskiy 15591e51764aSArtem Bityutskiy /* tnc.c */ 15601e51764aSArtem Bityutskiy int ubifs_lookup_level0(struct ubifs_info *c, const union ubifs_key *key, 15611e51764aSArtem Bityutskiy struct ubifs_znode **zn, int *n); 15621e51764aSArtem Bityutskiy int ubifs_tnc_lookup_nm(struct ubifs_info *c, const union ubifs_key *key, 15631e51764aSArtem Bityutskiy void *node, const struct qstr *nm); 15641e51764aSArtem Bityutskiy int ubifs_tnc_locate(struct ubifs_info *c, const union ubifs_key *key, 15651e51764aSArtem Bityutskiy void *node, int *lnum, int *offs); 15661e51764aSArtem Bityutskiy int ubifs_tnc_add(struct ubifs_info *c, const union ubifs_key *key, int lnum, 15671e51764aSArtem Bityutskiy int offs, int len); 15681e51764aSArtem Bityutskiy int ubifs_tnc_replace(struct ubifs_info *c, const union ubifs_key *key, 15691e51764aSArtem Bityutskiy int old_lnum, int old_offs, int lnum, int offs, int len); 15701e51764aSArtem Bityutskiy int ubifs_tnc_add_nm(struct ubifs_info *c, const union ubifs_key *key, 15711e51764aSArtem Bityutskiy int lnum, int offs, int len, const struct qstr *nm); 15721e51764aSArtem Bityutskiy int ubifs_tnc_remove(struct ubifs_info *c, const union ubifs_key *key); 15731e51764aSArtem Bityutskiy int ubifs_tnc_remove_nm(struct ubifs_info *c, const union ubifs_key *key, 15741e51764aSArtem Bityutskiy const struct qstr *nm); 15751e51764aSArtem Bityutskiy int ubifs_tnc_remove_range(struct ubifs_info *c, union ubifs_key *from_key, 15761e51764aSArtem Bityutskiy union ubifs_key *to_key); 15771e51764aSArtem Bityutskiy int ubifs_tnc_remove_ino(struct ubifs_info *c, ino_t inum); 15781e51764aSArtem Bityutskiy struct ubifs_dent_node *ubifs_tnc_next_ent(struct ubifs_info *c, 15791e51764aSArtem Bityutskiy union ubifs_key *key, 15801e51764aSArtem Bityutskiy const struct qstr *nm); 15811e51764aSArtem Bityutskiy void ubifs_tnc_close(struct ubifs_info *c); 15821e51764aSArtem Bityutskiy int ubifs_tnc_has_node(struct ubifs_info *c, union ubifs_key *key, int level, 15831e51764aSArtem Bityutskiy int lnum, int offs, int is_idx); 15841e51764aSArtem Bityutskiy int ubifs_dirty_idx_node(struct ubifs_info *c, union ubifs_key *key, int level, 15851e51764aSArtem Bityutskiy int lnum, int offs); 15861e51764aSArtem Bityutskiy /* Shared by tnc.c for tnc_commit.c */ 15871e51764aSArtem Bityutskiy void destroy_old_idx(struct ubifs_info *c); 15881e51764aSArtem Bityutskiy int is_idx_node_in_tnc(struct ubifs_info *c, union ubifs_key *key, int level, 15891e51764aSArtem Bityutskiy int lnum, int offs); 15901e51764aSArtem Bityutskiy int insert_old_idx_znode(struct ubifs_info *c, struct ubifs_znode *znode); 15914793e7c5SAdrian Hunter int ubifs_tnc_get_bu_keys(struct ubifs_info *c, struct bu_info *bu); 15924793e7c5SAdrian Hunter int ubifs_tnc_bulk_read(struct ubifs_info *c, struct bu_info *bu); 15931e51764aSArtem Bityutskiy 15941e51764aSArtem Bityutskiy /* tnc_misc.c */ 15951e51764aSArtem Bityutskiy struct ubifs_znode *ubifs_tnc_levelorder_next(struct ubifs_znode *zr, 15961e51764aSArtem Bityutskiy struct ubifs_znode *znode); 15971e51764aSArtem Bityutskiy int ubifs_search_zbranch(const struct ubifs_info *c, 15981e51764aSArtem Bityutskiy const struct ubifs_znode *znode, 15991e51764aSArtem Bityutskiy const union ubifs_key *key, int *n); 16001e51764aSArtem Bityutskiy struct ubifs_znode *ubifs_tnc_postorder_first(struct ubifs_znode *znode); 16011e51764aSArtem Bityutskiy struct ubifs_znode *ubifs_tnc_postorder_next(struct ubifs_znode *znode); 16021e51764aSArtem Bityutskiy long ubifs_destroy_tnc_subtree(struct ubifs_znode *zr); 16031e51764aSArtem Bityutskiy struct ubifs_znode *ubifs_load_znode(struct ubifs_info *c, 16041e51764aSArtem Bityutskiy struct ubifs_zbranch *zbr, 16051e51764aSArtem Bityutskiy struct ubifs_znode *parent, int iip); 16061e51764aSArtem Bityutskiy int ubifs_tnc_read_node(struct ubifs_info *c, struct ubifs_zbranch *zbr, 16071e51764aSArtem Bityutskiy void *node); 16081e51764aSArtem Bityutskiy 16091e51764aSArtem Bityutskiy /* tnc_commit.c */ 16101e51764aSArtem Bityutskiy int ubifs_tnc_start_commit(struct ubifs_info *c, struct ubifs_zbranch *zroot); 16111e51764aSArtem Bityutskiy int ubifs_tnc_end_commit(struct ubifs_info *c); 16121e51764aSArtem Bityutskiy 16131e51764aSArtem Bityutskiy /* shrinker.c */ 16141ab6c499SDave Chinner unsigned long ubifs_shrink_scan(struct shrinker *shrink, 16151ab6c499SDave Chinner struct shrink_control *sc); 16161ab6c499SDave Chinner unsigned long ubifs_shrink_count(struct shrinker *shrink, 16171ab6c499SDave Chinner struct shrink_control *sc); 16181e51764aSArtem Bityutskiy 16191e51764aSArtem Bityutskiy /* commit.c */ 16201e51764aSArtem Bityutskiy int ubifs_bg_thread(void *info); 16211e51764aSArtem Bityutskiy void ubifs_commit_required(struct ubifs_info *c); 16221e51764aSArtem Bityutskiy void ubifs_request_bg_commit(struct ubifs_info *c); 16231e51764aSArtem Bityutskiy int ubifs_run_commit(struct ubifs_info *c); 16241e51764aSArtem Bityutskiy void ubifs_recovery_commit(struct ubifs_info *c); 16251e51764aSArtem Bityutskiy int ubifs_gc_should_commit(struct ubifs_info *c); 16261e51764aSArtem Bityutskiy void ubifs_wait_for_commit(struct ubifs_info *c); 16271e51764aSArtem Bityutskiy 16281e51764aSArtem Bityutskiy /* master.c */ 16291e51764aSArtem Bityutskiy int ubifs_read_master(struct ubifs_info *c); 16301e51764aSArtem Bityutskiy int ubifs_write_master(struct ubifs_info *c); 16311e51764aSArtem Bityutskiy 16321e51764aSArtem Bityutskiy /* sb.c */ 16331e51764aSArtem Bityutskiy int ubifs_read_superblock(struct ubifs_info *c); 16341e51764aSArtem Bityutskiy struct ubifs_sb_node *ubifs_read_sb_node(struct ubifs_info *c); 16351e51764aSArtem Bityutskiy int ubifs_write_sb_node(struct ubifs_info *c, struct ubifs_sb_node *sup); 16366554a657SMatthew L. Creech int ubifs_fixup_free_space(struct ubifs_info *c); 16371e51764aSArtem Bityutskiy 16381e51764aSArtem Bityutskiy /* replay.c */ 16391e51764aSArtem Bityutskiy int ubifs_validate_entry(struct ubifs_info *c, 16401e51764aSArtem Bityutskiy const struct ubifs_dent_node *dent); 16411e51764aSArtem Bityutskiy int ubifs_replay_journal(struct ubifs_info *c); 16421e51764aSArtem Bityutskiy 16431e51764aSArtem Bityutskiy /* gc.c */ 16441e51764aSArtem Bityutskiy int ubifs_garbage_collect(struct ubifs_info *c, int anyway); 16451e51764aSArtem Bityutskiy int ubifs_gc_start_commit(struct ubifs_info *c); 16461e51764aSArtem Bityutskiy int ubifs_gc_end_commit(struct ubifs_info *c); 1647b466f17dSAdrian Hunter void ubifs_destroy_idx_gc(struct ubifs_info *c); 16481e51764aSArtem Bityutskiy int ubifs_get_idx_gc_leb(struct ubifs_info *c); 16491e51764aSArtem Bityutskiy int ubifs_garbage_collect_leb(struct ubifs_info *c, struct ubifs_lprops *lp); 16501e51764aSArtem Bityutskiy 16511e51764aSArtem Bityutskiy /* orphan.c */ 16521e51764aSArtem Bityutskiy int ubifs_add_orphan(struct ubifs_info *c, ino_t inum); 16531e51764aSArtem Bityutskiy void ubifs_delete_orphan(struct ubifs_info *c, ino_t inum); 16541e51764aSArtem Bityutskiy int ubifs_orphan_start_commit(struct ubifs_info *c); 16551e51764aSArtem Bityutskiy int ubifs_orphan_end_commit(struct ubifs_info *c); 16561e51764aSArtem Bityutskiy int ubifs_mount_orphans(struct ubifs_info *c, int unclean, int read_only); 165749d128aaSAdrian Hunter int ubifs_clear_orphans(struct ubifs_info *c); 16581e51764aSArtem Bityutskiy 16591e51764aSArtem Bityutskiy /* lpt.c */ 16601e51764aSArtem Bityutskiy int ubifs_calc_lpt_geom(struct ubifs_info *c); 16611e51764aSArtem Bityutskiy int ubifs_create_dflt_lpt(struct ubifs_info *c, int *main_lebs, int lpt_first, 16621e51764aSArtem Bityutskiy int *lpt_lebs, int *big_lpt); 16631e51764aSArtem Bityutskiy int ubifs_lpt_init(struct ubifs_info *c, int rd, int wr); 16641e51764aSArtem Bityutskiy struct ubifs_lprops *ubifs_lpt_lookup(struct ubifs_info *c, int lnum); 16651e51764aSArtem Bityutskiy struct ubifs_lprops *ubifs_lpt_lookup_dirty(struct ubifs_info *c, int lnum); 16661e51764aSArtem Bityutskiy int ubifs_lpt_scan_nolock(struct ubifs_info *c, int start_lnum, int end_lnum, 16671e51764aSArtem Bityutskiy ubifs_lpt_scan_callback scan_cb, void *data); 16681e51764aSArtem Bityutskiy 16691e51764aSArtem Bityutskiy /* Shared by lpt.c for lpt_commit.c */ 16701e51764aSArtem Bityutskiy void ubifs_pack_lsave(struct ubifs_info *c, void *buf, int *lsave); 16711e51764aSArtem Bityutskiy void ubifs_pack_ltab(struct ubifs_info *c, void *buf, 16721e51764aSArtem Bityutskiy struct ubifs_lpt_lprops *ltab); 16731e51764aSArtem Bityutskiy void ubifs_pack_pnode(struct ubifs_info *c, void *buf, 16741e51764aSArtem Bityutskiy struct ubifs_pnode *pnode); 16751e51764aSArtem Bityutskiy void ubifs_pack_nnode(struct ubifs_info *c, void *buf, 16761e51764aSArtem Bityutskiy struct ubifs_nnode *nnode); 16771e51764aSArtem Bityutskiy struct ubifs_pnode *ubifs_get_pnode(struct ubifs_info *c, 16781e51764aSArtem Bityutskiy struct ubifs_nnode *parent, int iip); 16791e51764aSArtem Bityutskiy struct ubifs_nnode *ubifs_get_nnode(struct ubifs_info *c, 16801e51764aSArtem Bityutskiy struct ubifs_nnode *parent, int iip); 16811e51764aSArtem Bityutskiy int ubifs_read_nnode(struct ubifs_info *c, struct ubifs_nnode *parent, int iip); 16821e51764aSArtem Bityutskiy void ubifs_add_lpt_dirt(struct ubifs_info *c, int lnum, int dirty); 16831e51764aSArtem Bityutskiy void ubifs_add_nnode_dirt(struct ubifs_info *c, struct ubifs_nnode *nnode); 16841e51764aSArtem Bityutskiy uint32_t ubifs_unpack_bits(uint8_t **addr, int *pos, int nrbits); 16851e51764aSArtem Bityutskiy struct ubifs_nnode *ubifs_first_nnode(struct ubifs_info *c, int *hght); 16862ba5f7aeSArtem Bityutskiy /* Needed only in debugging code in lpt_commit.c */ 16872ba5f7aeSArtem Bityutskiy int ubifs_unpack_nnode(const struct ubifs_info *c, void *buf, 16882ba5f7aeSArtem Bityutskiy struct ubifs_nnode *nnode); 16891e51764aSArtem Bityutskiy 16901e51764aSArtem Bityutskiy /* lpt_commit.c */ 16911e51764aSArtem Bityutskiy int ubifs_lpt_start_commit(struct ubifs_info *c); 16921e51764aSArtem Bityutskiy int ubifs_lpt_end_commit(struct ubifs_info *c); 16931e51764aSArtem Bityutskiy int ubifs_lpt_post_commit(struct ubifs_info *c); 16941e51764aSArtem Bityutskiy void ubifs_lpt_free(struct ubifs_info *c, int wr_only); 16951e51764aSArtem Bityutskiy 16961e51764aSArtem Bityutskiy /* lprops.c */ 16971e51764aSArtem Bityutskiy const struct ubifs_lprops *ubifs_change_lp(struct ubifs_info *c, 16981e51764aSArtem Bityutskiy const struct ubifs_lprops *lp, 16991e51764aSArtem Bityutskiy int free, int dirty, int flags, 17001e51764aSArtem Bityutskiy int idx_gc_cnt); 170184abf972SArtem Bityutskiy void ubifs_get_lp_stats(struct ubifs_info *c, struct ubifs_lp_stats *lst); 17021e51764aSArtem Bityutskiy void ubifs_add_to_cat(struct ubifs_info *c, struct ubifs_lprops *lprops, 17031e51764aSArtem Bityutskiy int cat); 17041e51764aSArtem Bityutskiy void ubifs_replace_cat(struct ubifs_info *c, struct ubifs_lprops *old_lprops, 17051e51764aSArtem Bityutskiy struct ubifs_lprops *new_lprops); 17061e51764aSArtem Bityutskiy void ubifs_ensure_cat(struct ubifs_info *c, struct ubifs_lprops *lprops); 17071e51764aSArtem Bityutskiy int ubifs_categorize_lprops(const struct ubifs_info *c, 17081e51764aSArtem Bityutskiy const struct ubifs_lprops *lprops); 17091e51764aSArtem Bityutskiy int ubifs_change_one_lp(struct ubifs_info *c, int lnum, int free, int dirty, 17101e51764aSArtem Bityutskiy int flags_set, int flags_clean, int idx_gc_cnt); 17111e51764aSArtem Bityutskiy int ubifs_update_one_lp(struct ubifs_info *c, int lnum, int free, int dirty, 17121e51764aSArtem Bityutskiy int flags_set, int flags_clean); 17131e51764aSArtem Bityutskiy int ubifs_read_one_lp(struct ubifs_info *c, int lnum, struct ubifs_lprops *lp); 17141e51764aSArtem Bityutskiy const struct ubifs_lprops *ubifs_fast_find_free(struct ubifs_info *c); 17151e51764aSArtem Bityutskiy const struct ubifs_lprops *ubifs_fast_find_empty(struct ubifs_info *c); 17161e51764aSArtem Bityutskiy const struct ubifs_lprops *ubifs_fast_find_freeable(struct ubifs_info *c); 17171e51764aSArtem Bityutskiy const struct ubifs_lprops *ubifs_fast_find_frdi_idx(struct ubifs_info *c); 1718be9e62a7SArtem Bityutskiy int ubifs_calc_dark(const struct ubifs_info *c, int spc); 17191e51764aSArtem Bityutskiy 17201e51764aSArtem Bityutskiy /* file.c */ 172102c24a82SJosef Bacik int ubifs_fsync(struct file *file, loff_t start, loff_t end, int datasync); 17221e51764aSArtem Bityutskiy int ubifs_setattr(struct dentry *dentry, struct iattr *attr); 17238c1c5f26SDongsheng Yang #ifdef CONFIG_UBIFS_ATIME_SUPPORT 17248c1c5f26SDongsheng Yang int ubifs_update_time(struct inode *inode, struct timespec *time, int flags); 17258c1c5f26SDongsheng Yang #endif 17261e51764aSArtem Bityutskiy 17271e51764aSArtem Bityutskiy /* dir.c */ 1728d475a507SRichard Weinberger struct inode *ubifs_new_inode(struct ubifs_info *c, struct inode *dir, 1729ad44be5cSAl Viro umode_t mode); 17301e51764aSArtem Bityutskiy int ubifs_getattr(struct vfsmount *mnt, struct dentry *dentry, 17311e51764aSArtem Bityutskiy struct kstat *stat); 1732f6337d84SRichard Weinberger int ubifs_check_dir_empty(struct inode *dir); 17331e51764aSArtem Bityutskiy 17341e51764aSArtem Bityutskiy /* xattr.c */ 17352b88fc21SAndreas Gruenbacher extern const struct xattr_handler *ubifs_xattr_handlers[]; 17361e51764aSArtem Bityutskiy ssize_t ubifs_listxattr(struct dentry *dentry, char *buffer, size_t size); 1737d7f0b70dSSubodh Nijsure int ubifs_init_security(struct inode *dentry, struct inode *inode, 1738d7f0b70dSSubodh Nijsure const struct qstr *qstr); 1739ade46c3aSRichard Weinberger int ubifs_xattr_set(struct inode *host, const char *name, const void *value, 1740ade46c3aSRichard Weinberger size_t size, int flags); 1741ade46c3aSRichard Weinberger ssize_t ubifs_xattr_get(struct inode *host, const char *name, void *buf, 1742ade46c3aSRichard Weinberger size_t size); 17431e51764aSArtem Bityutskiy 17441e51764aSArtem Bityutskiy /* super.c */ 17451e51764aSArtem Bityutskiy struct inode *ubifs_iget(struct super_block *sb, unsigned long inum); 17461e51764aSArtem Bityutskiy 17471e51764aSArtem Bityutskiy /* recovery.c */ 17481e51764aSArtem Bityutskiy int ubifs_recover_master_node(struct ubifs_info *c); 17491e51764aSArtem Bityutskiy int ubifs_write_rcvrd_mst_node(struct ubifs_info *c); 17501e51764aSArtem Bityutskiy struct ubifs_scan_leb *ubifs_recover_leb(struct ubifs_info *c, int lnum, 1751efcfde54SArtem Bityutskiy int offs, void *sbuf, int jhead); 17521e51764aSArtem Bityutskiy struct ubifs_scan_leb *ubifs_recover_log_leb(struct ubifs_info *c, int lnum, 17531e51764aSArtem Bityutskiy int offs, void *sbuf); 175483cef708SArtem Bityutskiy int ubifs_recover_inl_heads(struct ubifs_info *c, void *sbuf); 175583cef708SArtem Bityutskiy int ubifs_clean_lebs(struct ubifs_info *c, void *sbuf); 17561e51764aSArtem Bityutskiy int ubifs_rcvry_gc_commit(struct ubifs_info *c); 17571e51764aSArtem Bityutskiy int ubifs_recover_size_accum(struct ubifs_info *c, union ubifs_key *key, 17581e51764aSArtem Bityutskiy int deletion, loff_t new_size); 17591e51764aSArtem Bityutskiy int ubifs_recover_size(struct ubifs_info *c); 17601e51764aSArtem Bityutskiy void ubifs_destroy_size_tree(struct ubifs_info *c); 17611e51764aSArtem Bityutskiy 17621e51764aSArtem Bityutskiy /* ioctl.c */ 17631e51764aSArtem Bityutskiy long ubifs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 17641e51764aSArtem Bityutskiy void ubifs_set_inode_flags(struct inode *inode); 17651e51764aSArtem Bityutskiy #ifdef CONFIG_COMPAT 17661e51764aSArtem Bityutskiy long ubifs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 17671e51764aSArtem Bityutskiy #endif 17681e51764aSArtem Bityutskiy 17691e51764aSArtem Bityutskiy /* compressor.c */ 17701e51764aSArtem Bityutskiy int __init ubifs_compressors_init(void); 1771995be045SAlexey Dobriyan void ubifs_compressors_exit(void); 1772235c362bSSheng Yong void ubifs_compress(const struct ubifs_info *c, const void *in_buf, int in_len, 1773235c362bSSheng Yong void *out_buf, int *out_len, int *compr_type); 1774235c362bSSheng Yong int ubifs_decompress(const struct ubifs_info *c, const void *buf, int len, 1775235c362bSSheng Yong void *out, int *out_len, int compr_type); 17761e51764aSArtem Bityutskiy 1777d475a507SRichard Weinberger extern struct fscrypt_operations ubifs_crypt_operations; 1778d475a507SRichard Weinberger 17791e51764aSArtem Bityutskiy #include "debug.h" 17801e51764aSArtem Bityutskiy #include "misc.h" 17811e51764aSArtem Bityutskiy #include "key.h" 17821e51764aSArtem Bityutskiy 1783d475a507SRichard Weinberger #ifndef CONFIG_UBIFS_FS_ENCRYPTION 1784d475a507SRichard Weinberger #define fscrypt_set_d_op(i) 1785d475a507SRichard Weinberger #define fscrypt_get_ctx fscrypt_notsupp_get_ctx 1786d475a507SRichard Weinberger #define fscrypt_release_ctx fscrypt_notsupp_release_ctx 1787d475a507SRichard Weinberger #define fscrypt_encrypt_page fscrypt_notsupp_encrypt_page 1788d475a507SRichard Weinberger #define fscrypt_decrypt_page fscrypt_notsupp_decrypt_page 1789d475a507SRichard Weinberger #define fscrypt_decrypt_bio_pages fscrypt_notsupp_decrypt_bio_pages 1790d475a507SRichard Weinberger #define fscrypt_pullback_bio_page fscrypt_notsupp_pullback_bio_page 1791d475a507SRichard Weinberger #define fscrypt_restore_control_page fscrypt_notsupp_restore_control_page 1792d475a507SRichard Weinberger #define fscrypt_zeroout_range fscrypt_notsupp_zeroout_range 1793d475a507SRichard Weinberger #define fscrypt_process_policy fscrypt_notsupp_process_policy 1794d475a507SRichard Weinberger #define fscrypt_get_policy fscrypt_notsupp_get_policy 1795d475a507SRichard Weinberger #define fscrypt_has_permitted_context fscrypt_notsupp_has_permitted_context 1796d475a507SRichard Weinberger #define fscrypt_inherit_context fscrypt_notsupp_inherit_context 1797d475a507SRichard Weinberger #define fscrypt_get_encryption_info fscrypt_notsupp_get_encryption_info 1798d475a507SRichard Weinberger #define fscrypt_put_encryption_info fscrypt_notsupp_put_encryption_info 1799d475a507SRichard Weinberger #define fscrypt_setup_filename fscrypt_notsupp_setup_filename 1800d475a507SRichard Weinberger #define fscrypt_free_filename fscrypt_notsupp_free_filename 1801d475a507SRichard Weinberger #define fscrypt_fname_encrypted_size fscrypt_notsupp_fname_encrypted_size 1802d475a507SRichard Weinberger #define fscrypt_fname_alloc_buffer fscrypt_notsupp_fname_alloc_buffer 1803d475a507SRichard Weinberger #define fscrypt_fname_free_buffer fscrypt_notsupp_fname_free_buffer 1804d475a507SRichard Weinberger #define fscrypt_fname_disk_to_usr fscrypt_notsupp_fname_disk_to_usr 1805d475a507SRichard Weinberger #define fscrypt_fname_usr_to_disk fscrypt_notsupp_fname_usr_to_disk 1806d475a507SRichard Weinberger #endif 1807d475a507SRichard Weinberger 1808d475a507SRichard Weinberger static inline bool ubifs_crypt_is_encrypted(struct inode *inode) 1809d475a507SRichard Weinberger { 1810d475a507SRichard Weinberger struct ubifs_inode *ui = ubifs_inode(inode); 1811d475a507SRichard Weinberger 1812d475a507SRichard Weinberger return ui->flags & UBIFS_CRYPT_FL; 1813d475a507SRichard Weinberger } 1814d475a507SRichard Weinberger 18153e7f2c51SJoe Perches /* Normal UBIFS messages */ 18163e7f2c51SJoe Perches __printf(2, 3) 18173e7f2c51SJoe Perches void ubifs_msg(const struct ubifs_info *c, const char *fmt, ...); 18183e7f2c51SJoe Perches __printf(2, 3) 18193e7f2c51SJoe Perches void ubifs_err(const struct ubifs_info *c, const char *fmt, ...); 18203e7f2c51SJoe Perches __printf(2, 3) 18213e7f2c51SJoe Perches void ubifs_warn(const struct ubifs_info *c, const char *fmt, ...); 18223e7f2c51SJoe Perches /* 1823380bc8b7SDaniel Golle * A conditional variant of 'ubifs_err()' which doesn't output anything 1824380bc8b7SDaniel Golle * if probing (ie. MS_SILENT set). 18253e7f2c51SJoe Perches */ 18263e7f2c51SJoe Perches #define ubifs_errc(c, fmt, ...) \ 18273e7f2c51SJoe Perches do { \ 18283e7f2c51SJoe Perches if (!(c)->probing) \ 18293e7f2c51SJoe Perches ubifs_err(c, fmt, ##__VA_ARGS__); \ 18303e7f2c51SJoe Perches } while (0) 18313e7f2c51SJoe Perches 18321e51764aSArtem Bityutskiy #endif /* !__UBIFS_H__ */ 1833