^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * JFFS2 -- Journalling Flash File System, Version 2.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright © 2001-2007 Red Hat, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Created by David Woodhouse <dwmw2@infradead.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * For licensing information, see the file 'LICENCE' in this directory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #ifndef __JFFS2_NODELIST_H__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #define __JFFS2_NODELIST_H__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/jffs2.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include "jffs2_fs_sb.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include "jffs2_fs_i.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include "xattr.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include "acl.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include "summary.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #ifdef __ECOS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include "os-ecos.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include "os-linux.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define JFFS2_NATIVE_ENDIAN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) /* Note we handle mode bits conversion from JFFS2 (i.e. Linux) to/from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) whatever OS we're actually running on here too. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #if defined(JFFS2_NATIVE_ENDIAN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define cpu_to_je16(x) ((jint16_t){x})
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define cpu_to_je32(x) ((jint32_t){x})
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define cpu_to_jemode(x) ((jmode_t){os_to_jffs2_mode(x)})
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define constant_cpu_to_je16(x) ((jint16_t){x})
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #define constant_cpu_to_je32(x) ((jint32_t){x})
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define je16_to_cpu(x) ((x).v16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define je32_to_cpu(x) ((x).v32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define jemode_to_cpu(x) (jffs2_to_os_mode((x).m))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #elif defined(JFFS2_BIG_ENDIAN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define cpu_to_je16(x) ((jint16_t){cpu_to_be16(x)})
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define cpu_to_je32(x) ((jint32_t){cpu_to_be32(x)})
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #define cpu_to_jemode(x) ((jmode_t){cpu_to_be32(os_to_jffs2_mode(x))})
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define constant_cpu_to_je16(x) ((jint16_t){__constant_cpu_to_be16(x)})
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define constant_cpu_to_je32(x) ((jint32_t){__constant_cpu_to_be32(x)})
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #define je16_to_cpu(x) (be16_to_cpu(x.v16))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #define je32_to_cpu(x) (be32_to_cpu(x.v32))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #define jemode_to_cpu(x) (be32_to_cpu(jffs2_to_os_mode((x).m)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #elif defined(JFFS2_LITTLE_ENDIAN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #define cpu_to_je16(x) ((jint16_t){cpu_to_le16(x)})
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #define cpu_to_je32(x) ((jint32_t){cpu_to_le32(x)})
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #define cpu_to_jemode(x) ((jmode_t){cpu_to_le32(os_to_jffs2_mode(x))})
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #define constant_cpu_to_je16(x) ((jint16_t){__constant_cpu_to_le16(x)})
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) #define constant_cpu_to_je32(x) ((jint32_t){__constant_cpu_to_le32(x)})
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) #define je16_to_cpu(x) (le16_to_cpu(x.v16))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #define je32_to_cpu(x) (le32_to_cpu(x.v32))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) #define jemode_to_cpu(x) (le32_to_cpu(jffs2_to_os_mode((x).m)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) #error wibble
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) /* The minimal node header size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) #define JFFS2_MIN_NODE_HEADER sizeof(struct jffs2_raw_dirent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) This is all we need to keep in-core for each raw node during normal
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) operation. As and when we do read_inode on a particular inode, we can
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) scan the nodes which are listed for it and build up a proper map of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) which nodes are currently valid. JFFSv1 always used to keep that whole
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) map in core for each inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) struct jffs2_raw_node_ref
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) struct jffs2_raw_node_ref *next_in_ino; /* Points to the next raw_node_ref
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) for this object. If this _is_ the last, it points to the inode_cache,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) xattr_ref or xattr_datum instead. The common part of those structures
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) has NULL in the first word. See jffs2_raw_ref_to_ic() below */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) uint32_t flash_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) #undef TEST_TOTLEN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) #ifdef TEST_TOTLEN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) uint32_t __totlen; /* This may die; use ref_totlen(c, jeb, ) below */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) #define REF_LINK_NODE ((int32_t)-1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) #define REF_EMPTY_NODE ((int32_t)-2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) /* Use blocks of about 256 bytes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) #define REFS_PER_BLOCK ((255/sizeof(struct jffs2_raw_node_ref))-1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) static inline struct jffs2_raw_node_ref *ref_next(struct jffs2_raw_node_ref *ref)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) ref++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) /* Link to another block of refs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) if (ref->flash_offset == REF_LINK_NODE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) ref = ref->next_in_ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) if (!ref)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) return ref;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) /* End of chain */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) if (ref->flash_offset == REF_EMPTY_NODE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) return ref;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) static inline struct jffs2_inode_cache *jffs2_raw_ref_to_ic(struct jffs2_raw_node_ref *raw)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) while(raw->next_in_ino)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) raw = raw->next_in_ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) /* NB. This can be a jffs2_xattr_datum or jffs2_xattr_ref and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) not actually a jffs2_inode_cache. Check ->class */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) return ((struct jffs2_inode_cache *)raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) /* flash_offset & 3 always has to be zero, because nodes are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) always aligned at 4 bytes. So we have a couple of extra bits
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) to play with, which indicate the node's status; see below: */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) #define REF_UNCHECKED 0 /* We haven't yet checked the CRC or built its inode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) #define REF_OBSOLETE 1 /* Obsolete, can be completely ignored */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) #define REF_PRISTINE 2 /* Completely clean. GC without looking */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) #define REF_NORMAL 3 /* Possibly overlapped. Read the page and write again on GC */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) #define ref_flags(ref) ((ref)->flash_offset & 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) #define ref_offset(ref) ((ref)->flash_offset & ~3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) #define ref_obsolete(ref) (((ref)->flash_offset & 3) == REF_OBSOLETE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) #define mark_ref_normal(ref) do { (ref)->flash_offset = ref_offset(ref) | REF_NORMAL; } while(0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) /* Dirent nodes should be REF_PRISTINE only if they are not a deletion
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) dirent. Deletion dirents should be REF_NORMAL so that GC gets to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) throw them away when appropriate */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) #define dirent_node_state(rd) ( (je32_to_cpu((rd)->ino)?REF_PRISTINE:REF_NORMAL) )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) /* NB: REF_PRISTINE for an inode-less node (ref->next_in_ino == NULL) indicates
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) it is an unknown node of type JFFS2_NODETYPE_RWCOMPAT_COPY, so it'll get
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) copied. If you need to do anything different to GC inode-less nodes, then
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) you need to modify gc.c accordingly. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) /* For each inode in the filesystem, we need to keep a record of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) nlink, because it would be a PITA to scan the whole directory tree
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) at read_inode() time to calculate it, and to keep sufficient information
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) in the raw_node_ref (basically both parent and child inode number for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) dirent nodes) would take more space than this does. We also keep
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) a pointer to the first physical node which is part of this inode, too.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) struct jffs2_inode_cache {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) /* First part of structure is shared with other objects which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) can terminate the raw node refs' next_in_ino list -- which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) currently struct jffs2_xattr_datum and struct jffs2_xattr_ref. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) struct jffs2_full_dirent *scan_dents; /* Used during scan to hold
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) temporary lists of dirents, and later must be set to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) NULL to mark the end of the raw_node_ref->next_in_ino
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) chain. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) struct jffs2_raw_node_ref *nodes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) uint8_t class; /* It's used for identification */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) /* end of shared structure */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) uint8_t flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) uint16_t state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) uint32_t ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) struct jffs2_inode_cache *next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) #ifdef CONFIG_JFFS2_FS_XATTR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) struct jffs2_xattr_ref *xref;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) uint32_t pino_nlink; /* Directories store parent inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) here; other inodes store nlink.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) Zero always means that it's
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) completely unlinked. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) /* Inode states for 'state' above. We need the 'GC' state to prevent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) someone from doing a read_inode() while we're moving a 'REF_PRISTINE'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) node without going through all the iget() nonsense */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) #define INO_STATE_UNCHECKED 0 /* CRC checks not yet done */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) #define INO_STATE_CHECKING 1 /* CRC checks in progress */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) #define INO_STATE_PRESENT 2 /* In core */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) #define INO_STATE_CHECKEDABSENT 3 /* Checked, cleared again */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) #define INO_STATE_GC 4 /* GCing a 'pristine' node */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) #define INO_STATE_READING 5 /* In read_inode() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) #define INO_STATE_CLEARING 6 /* In clear_inode() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) #define INO_FLAGS_XATTR_CHECKED 0x01 /* has no duplicate xattr_ref */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) #define INO_FLAGS_IS_DIR 0x02 /* is a directory */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) #define RAWNODE_CLASS_INODE_CACHE 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) #define RAWNODE_CLASS_XATTR_DATUM 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) #define RAWNODE_CLASS_XATTR_REF 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) #define INOCACHE_HASHSIZE_MIN 128
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) #define INOCACHE_HASHSIZE_MAX 1024
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) #define write_ofs(c) ((c)->nextblock->offset + (c)->sector_size - (c)->nextblock->free_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) Larger representation of a raw node, kept in-core only when the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) struct inode for this particular ino is instantiated.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) struct jffs2_full_dnode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) struct jffs2_raw_node_ref *raw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) uint32_t ofs; /* The offset to which the data of this node belongs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) uint32_t size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) uint32_t frags; /* Number of fragments which currently refer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) to this node. When this reaches zero,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) the node is obsolete. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) Even larger representation of a raw node, kept in-core only while
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) we're actually building up the original map of which nodes go where,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) in read_inode()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) struct jffs2_tmp_dnode_info
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) struct rb_node rb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) struct jffs2_full_dnode *fn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) uint32_t version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) uint32_t data_crc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) uint32_t partial_crc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) uint32_t csize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) uint16_t overlapped;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) /* Temporary data structure used during readinode. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) struct jffs2_readinode_info
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) struct rb_root tn_root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) struct jffs2_tmp_dnode_info *mdata_tn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) uint32_t highest_version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) uint32_t latest_mctime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) uint32_t mctime_ver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) struct jffs2_full_dirent *fds;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) struct jffs2_raw_node_ref *latest_ref;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) struct jffs2_full_dirent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) union {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) struct jffs2_raw_node_ref *raw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) struct jffs2_inode_cache *ic; /* Just during part of build */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) struct jffs2_full_dirent *next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) uint32_t version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) uint32_t ino; /* == zero for unlink */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) unsigned int nhash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) unsigned char type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) unsigned char name[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) Fragments - used to build a map of which raw node to obtain
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) data from for each part of the ino
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) struct jffs2_node_frag
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) struct rb_node rb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) struct jffs2_full_dnode *node; /* NULL for holes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) uint32_t size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) uint32_t ofs; /* The offset to which this fragment belongs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) struct jffs2_eraseblock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) struct list_head list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) int bad_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) uint32_t offset; /* of this block in the MTD */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) uint32_t unchecked_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) uint32_t used_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) uint32_t dirty_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) uint32_t wasted_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) uint32_t free_size; /* Note that sector_size - free_size
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) is the address of the first free space */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) uint32_t allocated_refs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) struct jffs2_raw_node_ref *first_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) struct jffs2_raw_node_ref *last_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) struct jffs2_raw_node_ref *gc_node; /* Next node to be garbage collected */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) static inline int jffs2_blocks_use_vmalloc(struct jffs2_sb_info *c)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) return ((c->flash_size / c->sector_size) * sizeof (struct jffs2_eraseblock)) > (128 * 1024);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) #define ref_totlen(a, b, c) __jffs2_ref_totlen((a), (b), (c))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) #define ALLOC_NORMAL 0 /* Normal allocation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) #define ALLOC_DELETION 1 /* Deletion node. Best to allow it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) #define ALLOC_GC 2 /* Space requested for GC. Give it or die */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) #define ALLOC_NORETRY 3 /* For jffs2_write_dnode: On failure, return -EAGAIN instead of retrying */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) /* How much dirty space before it goes on the very_dirty_list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) #define VERYDIRTY(c, size) ((size) >= ((c)->sector_size / 2))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) /* check if dirty space is more than 255 Byte */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) #define ISDIRTY(size) ((size) > sizeof (struct jffs2_raw_inode) + JFFS2_MIN_DATA_LEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) #define PAD(x) (((x)+3)&~3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) static inline int jffs2_encode_dev(union jffs2_device_node *jdev, dev_t rdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) if (old_valid_dev(rdev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) jdev->old_id = cpu_to_je16(old_encode_dev(rdev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) return sizeof(jdev->old_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) jdev->new_id = cpu_to_je32(new_encode_dev(rdev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) return sizeof(jdev->new_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) static inline struct jffs2_node_frag *frag_first(struct rb_root *root)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) struct rb_node *node = rb_first(root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) if (!node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) return rb_entry(node, struct jffs2_node_frag, rb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) static inline struct jffs2_node_frag *frag_last(struct rb_root *root)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) struct rb_node *node = rb_last(root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) if (!node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) return rb_entry(node, struct jffs2_node_frag, rb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) #define frag_next(frag) rb_entry(rb_next(&(frag)->rb), struct jffs2_node_frag, rb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) #define frag_prev(frag) rb_entry(rb_prev(&(frag)->rb), struct jffs2_node_frag, rb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) #define frag_parent(frag) rb_entry(rb_parent(&(frag)->rb), struct jffs2_node_frag, rb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) #define frag_left(frag) rb_entry((frag)->rb.rb_left, struct jffs2_node_frag, rb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) #define frag_right(frag) rb_entry((frag)->rb.rb_right, struct jffs2_node_frag, rb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) #define frag_erase(frag, list) rb_erase(&frag->rb, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) #define tn_next(tn) rb_entry(rb_next(&(tn)->rb), struct jffs2_tmp_dnode_info, rb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) #define tn_prev(tn) rb_entry(rb_prev(&(tn)->rb), struct jffs2_tmp_dnode_info, rb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) #define tn_parent(tn) rb_entry(rb_parent(&(tn)->rb), struct jffs2_tmp_dnode_info, rb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) #define tn_left(tn) rb_entry((tn)->rb.rb_left, struct jffs2_tmp_dnode_info, rb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) #define tn_right(tn) rb_entry((tn)->rb.rb_right, struct jffs2_tmp_dnode_info, rb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) #define tn_erase(tn, list) rb_erase(&tn->rb, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) #define tn_last(list) rb_entry(rb_last(list), struct jffs2_tmp_dnode_info, rb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) #define tn_first(list) rb_entry(rb_first(list), struct jffs2_tmp_dnode_info, rb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) /* nodelist.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) void jffs2_add_fd_to_list(struct jffs2_sb_info *c, struct jffs2_full_dirent *new, struct jffs2_full_dirent **list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) void jffs2_set_inocache_state(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic, int state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) struct jffs2_inode_cache *jffs2_get_ino_cache(struct jffs2_sb_info *c, uint32_t ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) void jffs2_add_ino_cache (struct jffs2_sb_info *c, struct jffs2_inode_cache *new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) void jffs2_del_ino_cache(struct jffs2_sb_info *c, struct jffs2_inode_cache *old);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) void jffs2_free_ino_caches(struct jffs2_sb_info *c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) void jffs2_free_raw_node_refs(struct jffs2_sb_info *c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) struct jffs2_node_frag *jffs2_lookup_node_frag(struct rb_root *fragtree, uint32_t offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) void jffs2_kill_fragtree(struct rb_root *root, struct jffs2_sb_info *c_delete);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) int jffs2_add_full_dnode_to_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_full_dnode *fn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) uint32_t jffs2_truncate_fragtree (struct jffs2_sb_info *c, struct rb_root *list, uint32_t size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) struct jffs2_raw_node_ref *jffs2_link_node_ref(struct jffs2_sb_info *c,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) struct jffs2_eraseblock *jeb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) uint32_t ofs, uint32_t len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) struct jffs2_inode_cache *ic);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) extern uint32_t __jffs2_ref_totlen(struct jffs2_sb_info *c,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) struct jffs2_eraseblock *jeb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) struct jffs2_raw_node_ref *ref);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) /* nodemgmt.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) int jffs2_thread_should_wake(struct jffs2_sb_info *c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) int jffs2_reserve_space(struct jffs2_sb_info *c, uint32_t minsize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) uint32_t *len, int prio, uint32_t sumsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) int jffs2_reserve_space_gc(struct jffs2_sb_info *c, uint32_t minsize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) uint32_t *len, uint32_t sumsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) struct jffs2_raw_node_ref *jffs2_add_physical_node_ref(struct jffs2_sb_info *c,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) uint32_t ofs, uint32_t len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) struct jffs2_inode_cache *ic);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) void jffs2_complete_reservation(struct jffs2_sb_info *c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) void jffs2_mark_node_obsolete(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) /* write.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) int jffs2_do_new_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, uint32_t mode, struct jffs2_raw_inode *ri);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) struct jffs2_full_dnode *jffs2_write_dnode(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) struct jffs2_raw_inode *ri, const unsigned char *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) uint32_t datalen, int alloc_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) struct jffs2_full_dirent *jffs2_write_dirent(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) struct jffs2_raw_dirent *rd, const unsigned char *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) uint32_t namelen, int alloc_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) int jffs2_write_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) struct jffs2_raw_inode *ri, unsigned char *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) uint32_t offset, uint32_t writelen, uint32_t *retlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, struct jffs2_inode_info *f,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) struct jffs2_raw_inode *ri, const struct qstr *qstr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, const char *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) int namelen, struct jffs2_inode_info *dead_f, uint32_t time);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) int jffs2_do_link(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, uint32_t ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) uint8_t type, const char *name, int namelen, uint32_t time);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) /* readinode.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) int jffs2_do_read_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) uint32_t ino, struct jffs2_raw_inode *latest_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) int jffs2_do_crccheck_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) void jffs2_do_clear_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) /* malloc.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) int jffs2_create_slab_caches(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) void jffs2_destroy_slab_caches(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) struct jffs2_full_dirent *jffs2_alloc_full_dirent(int namesize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) void jffs2_free_full_dirent(struct jffs2_full_dirent *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) struct jffs2_full_dnode *jffs2_alloc_full_dnode(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) void jffs2_free_full_dnode(struct jffs2_full_dnode *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) struct jffs2_raw_dirent *jffs2_alloc_raw_dirent(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) void jffs2_free_raw_dirent(struct jffs2_raw_dirent *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) struct jffs2_raw_inode *jffs2_alloc_raw_inode(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) void jffs2_free_raw_inode(struct jffs2_raw_inode *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) struct jffs2_tmp_dnode_info *jffs2_alloc_tmp_dnode_info(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) void jffs2_free_tmp_dnode_info(struct jffs2_tmp_dnode_info *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) int jffs2_prealloc_raw_node_refs(struct jffs2_sb_info *c,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) struct jffs2_eraseblock *jeb, int nr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) void jffs2_free_refblock(struct jffs2_raw_node_ref *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) struct jffs2_node_frag *jffs2_alloc_node_frag(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) void jffs2_free_node_frag(struct jffs2_node_frag *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) struct jffs2_inode_cache *jffs2_alloc_inode_cache(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) void jffs2_free_inode_cache(struct jffs2_inode_cache *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) #ifdef CONFIG_JFFS2_FS_XATTR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) struct jffs2_xattr_datum *jffs2_alloc_xattr_datum(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) void jffs2_free_xattr_datum(struct jffs2_xattr_datum *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) struct jffs2_xattr_ref *jffs2_alloc_xattr_ref(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) void jffs2_free_xattr_ref(struct jffs2_xattr_ref *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) /* gc.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) int jffs2_garbage_collect_pass(struct jffs2_sb_info *c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) /* read.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) int jffs2_read_dnode(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) struct jffs2_full_dnode *fd, unsigned char *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) int ofs, int len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) int jffs2_read_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) unsigned char *buf, uint32_t offset, uint32_t len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) char *jffs2_getlink(struct jffs2_sb_info *c, struct jffs2_inode_info *f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) /* scan.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) int jffs2_scan_medium(struct jffs2_sb_info *c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) void jffs2_rotate_lists(struct jffs2_sb_info *c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) struct jffs2_inode_cache *jffs2_scan_make_ino_cache(struct jffs2_sb_info *c, uint32_t ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) int jffs2_scan_classify_jeb(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) int jffs2_scan_dirty_space(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) /* build.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) int jffs2_do_mount_fs(struct jffs2_sb_info *c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) /* erase.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) int jffs2_erase_pending_blocks(struct jffs2_sb_info *c, int count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) void jffs2_free_jeb_node_refs(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) #ifdef CONFIG_JFFS2_FS_WRITEBUFFER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) /* wbuf.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) #include "debug.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) #endif /* __JFFS2_NODELIST_H__ */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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