ecos: packages/redboot/current/src/fs/e2fs.c annotate

annotate packages/redboot/current/src/fs/e2fs.c @ 2729:74dbf4c3f2e1 after-copyright-change-20090129

Update all copyright banners to reflect FSF ownership; fix and improve licence text.

author	jlarmour
date	Thu, 29 Jan 2009 17:47:46 +0000
parents	6cbecf3cc2e4
children

rev	line source
174 38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	1 //==========================================================================
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	2 //
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	3 // e2fs.c
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	4 //
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	5 // RedBoot support for second extended filesystem
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	6 //
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	7 //==========================================================================
2729 74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2614 diff changeset	8 // ####ECOSGPLCOPYRIGHTBEGIN####
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2614 diff changeset	9 // -------------------------------------------
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2614 diff changeset	10 // This file is part of eCos, the Embedded Configurable Operating System.
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2614 diff changeset	11 // Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2008 Free Software Foundation, Inc.
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 182 diff changeset	12 //
2729 74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2614 diff changeset	13 // eCos is free software; you can redistribute it and/or modify it under
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2614 diff changeset	14 // the terms of the GNU General Public License as published by the Free
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2614 diff changeset	15 // Software Foundation; either version 2 or (at your option) any later
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2614 diff changeset	16 // version.
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 182 diff changeset	17 //
2729 74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2614 diff changeset	18 // eCos is distributed in the hope that it will be useful, but WITHOUT
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2614 diff changeset	19 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2614 diff changeset	20 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2614 diff changeset	21 // for more details.
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 182 diff changeset	22 //
2729 74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2614 diff changeset	23 // You should have received a copy of the GNU General Public License
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2614 diff changeset	24 // along with eCos; if not, write to the Free Software Foundation, Inc.,
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2614 diff changeset	25 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 182 diff changeset	26 //
2729 74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2614 diff changeset	27 // As a special exception, if other files instantiate templates or use
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2614 diff changeset	28 // macros or inline functions from this file, or you compile this file
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2614 diff changeset	29 // and link it with other works to produce a work based on this file,
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2614 diff changeset	30 // this file does not by itself cause the resulting work to be covered by
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2614 diff changeset	31 // the GNU General Public License. However the source code for this file
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2614 diff changeset	32 // must still be made available in accordance with section (3) of the GNU
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2614 diff changeset	33 // General Public License v2.
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 182 diff changeset	34 //
2729 74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2614 diff changeset	35 // This exception does not invalidate any other reasons why a work based
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2614 diff changeset	36 // on this file might be covered by the GNU General Public License.
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2614 diff changeset	37 // -------------------------------------------
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2614 diff changeset	38 // ####ECOSGPLCOPYRIGHTEND####
174 38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	39 //==========================================================================
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	40 //#####DESCRIPTIONBEGIN####
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	41 //
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	42 // Author(s): msalter
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	43 // Contributors: msalter
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	44 // Date: 2001-07-14
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	45 // Purpose:
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	46 // Description:
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	47 //
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	48 // This code is part of RedBoot (tm).
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	49 //
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	50 //####DESCRIPTIONEND####
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	51 //
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	52 //==========================================================================
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	53
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	54 #include <redboot.h>
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	55 #include <fs/disk.h>
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	56 #include <fs/e2fs.h>
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	57
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	58 #define DEBUG_E2FS 0
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	59
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	60 #if DEBUG_E2FS > 4
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	61 static void dump_sb(struct e2fs_super_block *s);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	62 static void dump_inode(struct e2fs_inode *i);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	63 #endif
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	64
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	65 static void e2fs_open(partition_t p, const char *path);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	66 static int e2fs_read(void fp, char buf, cyg_uint32 nbytes);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	67
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	68 // This structure is the only thing exported by this module.
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	69 // These filesystem function pointers are attached to disk
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	70 // partitions in the generic disk handling code.
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	71 //
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	72 fs_funs_t redboot_e2fs_funs = {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	73 e2fs_open,
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	74 e2fs_read
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	75 };
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	76
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	77 // A single block buffer to be shared carefully.
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	78 static cyg_uint32 blockbuf[E2FS_MAX_BLOCK_SIZE/sizeof(cyg_uint32)];
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	79
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	80 #define __READ_BLOCK(n) \
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	81 PARTITION_READ(e2fs->part, E2FS_BLOCK_TO_SECTOR(e2fs, (n)), \
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	82 blockbuf, e2fs->blocksize/SECTOR_SIZE)
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	83
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	84 // Get a group descriptor. Returns non-zero for success.
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	85 //
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	86 static int
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	87 e2fs_get_gdesc(e2fs_desc_t e2fs, cyg_uint32 group_nr, e2fs_group_t gdesc)
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	88 {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	89 cyg_uint32 sec_nr;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	90
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	91 if (group_nr < e2fs->gdesc_first \|\|
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	92 group_nr >= (e2fs->gdesc_first + E2FS_GDESC_CACHE_SIZE)) {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	93
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	94 // cache miss
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	95 sec_nr = E2FS_BLOCK_TO_SECTOR(e2fs, e2fs->gdesc_block);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	96 sec_nr += (group_nr / E2FS_GDESC_PER_SECTOR);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	97
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	98 #if DEBUG_E2FS > 2
182 f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	99 diag_printf("%s: group[%d] cache miss, sec_nr[%d]\n",
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	100 __FUNCTION__, group_nr, sec_nr);
174 38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	101 #endif
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	102 if (!PARTITION_READ(e2fs->part, sec_nr, (cyg_uint32 *)e2fs->gdesc_cache,
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	103 sizeof(e2fs->gdesc_cache)/SECTOR_SIZE))
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	104 return 0;
466 995048bffcec RedBoot e2fs fix msalter parents: 325 diff changeset	105
995048bffcec RedBoot e2fs fix msalter parents: 325 diff changeset	106 e2fs->gdesc_first = (group_nr / E2FS_GDESC_CACHE_SIZE) * E2FS_GDESC_CACHE_SIZE;
174 38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	107 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	108 *gdesc = e2fs->gdesc_cache[group_nr - e2fs->gdesc_first];
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	109
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	110 return 1;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	111 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	112
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	113 // Read the requested inode from disk. Return non-zero if successful
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	114 //
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	115 static int
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	116 e2fs_get_inode(e2fs_desc_t e2fs, int ino, e2fs_inode_t ip)
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	117 {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	118 cyg_uint32 offset, sec_nr, buf[SECTOR_SIZE/sizeof(cyg_uint32)];
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	119 e2fs_group_t gdesc;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	120
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	121 // get descriptor for group which this inode belongs to
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	122 if (!e2fs_get_gdesc(e2fs, (ino - 1) / e2fs->inodes_per_group, &gdesc))
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	123 return 0;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	124 if (gdesc.inode_table == 0)
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	125 return 0;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	126
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	127 // byte offset within group inode table
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	128 offset = ((ino - 1) % e2fs->inodes_per_group) * sizeof(struct e2fs_inode);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	129
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	130 // figure out which sector holds the inode
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	131 sec_nr = E2FS_BLOCK_TO_SECTOR(e2fs, SWAB_LE32(gdesc.inode_table));
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	132 sec_nr += offset / SECTOR_SIZE;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	133
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	134 // and the offset within that sector.
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	135 offset %= SECTOR_SIZE;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	136
634 8285bebc3a89 Minor IDE [debug] improvements. gthomas parents: 466 diff changeset	137 #if DEBUG_E2FS > 0x08
182 f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	138 diag_printf("%s: ino[%d], sec_nr[%d] offset[%d]\n", __FUNCTION__,
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	139 ino, sec_nr, offset);
174 38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	140 #endif
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	141
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	142 if (!PARTITION_READ(e2fs->part, sec_nr, buf, 1))
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	143 return 0;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	144
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	145 ip = (e2fs_inode_t )((char )buf + offset);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	146
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	147 #if DEBUG_E2FS > 0
182 f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	148 diag_printf("%s: inode size[%d]\n", __FUNCTION__, SWAB_LE32(ip->size));
174 38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	149 #endif
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	150
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	151 return 1;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	152 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	153
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	154 // Mount an e2fs filesystem on the given partition.
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	155 // Return 0 if successful.
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	156 //
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	157 static int
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	158 e2fs_mount(partition_t part, e2fs_desc_t e2fs)
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	159 {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	160 int sb_block = 1;
2614 6cbecf3cc2e4 * src/fconfig.c, src/flash.c, src/io.c, src/load.c, src/main.c, jlarmour parents: 634 diff changeset	161 union {
6cbecf3cc2e4 * src/fconfig.c, src/flash.c, src/io.c, src/load.c, src/main.c, jlarmour parents: 634 diff changeset	162 cyg_uint32 sb_buf[E2FS_MIN_BLOCK_SIZE/sizeof(cyg_uint32)];
6cbecf3cc2e4 * src/fconfig.c, src/flash.c, src/io.c, src/load.c, src/main.c, jlarmour parents: 634 diff changeset	163 struct e2fs_super_block sbdata;
6cbecf3cc2e4 * src/fconfig.c, src/flash.c, src/io.c, src/load.c, src/main.c, jlarmour parents: 634 diff changeset	164 } sbdata_union;
6cbecf3cc2e4 * src/fconfig.c, src/flash.c, src/io.c, src/load.c, src/main.c, jlarmour parents: 634 diff changeset	165 struct e2fs_super_block *sb=&sbdata_union.sbdata;
174 38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	166
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	167 e2fs->part = part;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	168
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	169 if (!PARTITION_READ(part, sb_block*(E2FS_MIN_BLOCK_SIZE/SECTOR_SIZE),
2614 6cbecf3cc2e4 * src/fconfig.c, src/flash.c, src/io.c, src/load.c, src/main.c, jlarmour parents: 634 diff changeset	170 &sbdata_union.sb_buf[0], E2FS_MIN_BLOCK_SIZE/SECTOR_SIZE))
174 38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	171 return -1;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	172
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	173 if (SWAB_LE16(sb->magic) != E2FS_SUPER_MAGIC) {
182 f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	174 diag_printf("ext2_mount: bad magic 0x%x\n", SWAB_LE16(sb->magic));
174 38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	175 return -1;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	176 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	177
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	178 // save some stuff for easy access
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	179 e2fs->blocksize = E2FS_BLOCK_SIZE(sb);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	180 e2fs->nr_ind_blocks = (e2fs)->blocksize / sizeof(cyg_uint32);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	181 e2fs->nr_dind_blocks = e2fs->nr_ind_blocks * ((e2fs)->blocksize / sizeof(cyg_uint32));
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	182 e2fs->nr_tind_blocks = e2fs->nr_dind_blocks * ((e2fs)->blocksize / sizeof(cyg_uint32));
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	183 e2fs->blocks_per_group = SWAB_LE32(sb->blocks_per_group);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	184 e2fs->ngroups = (SWAB_LE32(sb->blocks_count) + e2fs->blocks_per_group - 1) /
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	185 e2fs->blocks_per_group;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	186 e2fs->inodes_per_group = SWAB_LE32(sb->inodes_per_group);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	187
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	188 // Find the group descriptors which follow superblock
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	189 e2fs->gdesc_block = ((sb_block * E2FS_MIN_BLOCK_SIZE) / e2fs->blocksize) + 1;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	190 e2fs->gdesc_first = 0; // cache group 0 initially
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	191
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	192 if (!PARTITION_READ(part, E2FS_BLOCK_TO_SECTOR(e2fs,e2fs->gdesc_block),
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	193 (cyg_uint32 *)e2fs->gdesc_cache, 1))
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	194 return -1;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	195
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	196 #if DEBUG_E2FS > 1
182 f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	197 diag_printf("E2FS superblock:\n");
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	198 diag_printf(" [%d] inodes\n", SWAB_LE32(sb->inodes_count));
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	199 diag_printf(" [%d] blocks\n", SWAB_LE32(sb->blocks_count));
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	200 diag_printf(" [%d] blocksize\n", e2fs->blocksize);
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	201 diag_printf(" [%d] blocks per group\n", e2fs->blocks_per_group);
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	202 diag_printf(" [%d] ngroups\n", e2fs->ngroups);
174 38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	203 #endif
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	204
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	205 #if DEBUG_E2FS > 4
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	206 dump_sb(sb);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	207 #endif
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	208
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	209 return 0;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	210 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	211
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	212 // Convert a block index into inode data into a block_nr.
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	213 // If successful, store block number in pblknr and return non-zero.
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	214 //
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	215 // NB: This needs some block/sector caching to be speedier. But
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	216 // that takes memory and speed is not too bad now for files
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	217 // small enough to avoid double and triple indirection.
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	218 //
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	219 static int
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	220 e2fs_inode_block(e2fs_desc_t e2fs, e2fs_inode_t inode,
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	221 cyg_uint32 bindex, cyg_uint32 *pblknr)
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	222 {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	223 if (bindex < E2FS_NR_DIR_BLOCKS) {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	224 *pblknr = SWAB_LE32(inode->block[bindex]);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	225 return 1;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	226 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	227 bindex -= E2FS_NR_DIR_BLOCKS;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	228
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	229 if (bindex < e2fs->nr_ind_blocks) {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	230 // Indirect block
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	231 if (!__READ_BLOCK(SWAB_LE32(inode->block[E2FS_IND_BLOCK])))
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	232 return 0;
325 e46ccba0c5f1 redboot/fs endianess tweak msalter parents: 210 diff changeset	233 *pblknr = SWAB_LE32(blockbuf[bindex]);
174 38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	234 return 1;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	235 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	236 bindex -= e2fs->nr_ind_blocks;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	237
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	238 if (bindex < e2fs->nr_dind_blocks) {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	239 // Double indirect block
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	240 if (!__READ_BLOCK(SWAB_LE32(inode->block[E2FS_DIND_BLOCK])))
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	241 return 0;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	242 if (!__READ_BLOCK(SWAB_LE32(blockbuf[bindex / e2fs->nr_ind_blocks])))
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	243 return 0;
325 e46ccba0c5f1 redboot/fs endianess tweak msalter parents: 210 diff changeset	244 *pblknr = SWAB_LE32(blockbuf[bindex % e2fs->nr_ind_blocks]);
174 38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	245 return 1;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	246 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	247 bindex -= e2fs->nr_dind_blocks;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	248
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	249 // Triple indirect block
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	250 if (!__READ_BLOCK(SWAB_LE32(inode->block[E2FS_TIND_BLOCK])))
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	251 return 0;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	252 if (!__READ_BLOCK(SWAB_LE32(blockbuf[bindex / e2fs->nr_dind_blocks])))
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	253 return 0;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	254 bindex %= e2fs->nr_dind_blocks;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	255 if (!__READ_BLOCK(SWAB_LE32(blockbuf[bindex / e2fs->nr_ind_blocks])))
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	256 return 0;
325 e46ccba0c5f1 redboot/fs endianess tweak msalter parents: 210 diff changeset	257 *pblknr = SWAB_LE32(blockbuf[bindex % e2fs->nr_ind_blocks]);
174 38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	258 return 1;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	259 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	260
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	261
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	262 // search a single directory block in memory looking for an
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	263 // entry with the given name. Return pointer to entry if
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	264 // found, NULL if not.
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	265 //
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	266 static e2fs_dir_entry_t *
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	267 search_dir_block(e2fs_desc_t e2fs, cyg_uint32 blkbuf,
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	268 const char *name, int namelen)
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	269 {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	270 e2fs_dir_entry_t *dir;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	271 cyg_uint16 reclen, len;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	272 cyg_uint32 offset;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	273
634 8285bebc3a89 Minor IDE [debug] improvements. gthomas parents: 466 diff changeset	274 #if DEBUG_E2FS > 0
8285bebc3a89 Minor IDE [debug] improvements. gthomas parents: 466 diff changeset	275 diag_dump_buf(blkbuf, e2fs->blocksize);
8285bebc3a89 Minor IDE [debug] improvements. gthomas parents: 466 diff changeset	276 #endif
174 38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	277 offset = 0;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	278 while (offset < e2fs->blocksize) {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	279 dir = (e2fs_dir_entry_t )((char )blkbuf + offset);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	280 reclen = SWAB_LE16(dir->reclen);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	281 offset += reclen;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	282 len = dir->namelen;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	283
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	284 // terminate on anything which doesn't make sense
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	285 if (reclen < 8 \|\| (len + 8) > reclen \|\| offset > (e2fs->blocksize + 1))
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	286 return NULL;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	287
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	288 if (dir->inode && len == namelen && !strncmp(dir->name, name, len))
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	289 return dir;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	290 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	291 return NULL;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	292 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	293
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	294
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	295 // Look in the given directory for an entry with the given name.
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	296 // If found, return a pointer to that entry. Return NULL if not
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	297 // found.
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	298 //
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	299 static e2fs_dir_entry_t *
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	300 e2fs_dir_lookup(e2fs_desc_t *e2fs, cyg_uint32 dir_ino,
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	301 const char *name, int namelen)
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	302 {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	303 e2fs_inode_t inode;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	304 e2fs_dir_entry_t *dir;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	305 cyg_uint32 nblocks, last_block_size, i, block_nr, nbytes;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	306
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	307 #if DEBUG_E2FS > 0
182 f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	308 diag_printf("%s: looking for %s [%d] in ino[%d]\n",
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	309 __FUNCTION__, name, namelen, dir_ino);
174 38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	310 #endif
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	311
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	312 if (!e2fs_get_inode(e2fs, dir_ino, &inode)) {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	313 #if DEBUG_E2FS > 0
182 f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	314 diag_printf("%s: e2fs_get_inode [%d] failed\n", __FUNCTION__, dir_ino);
174 38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	315 #endif
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	316 return NULL;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	317 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	318
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	319 nbytes = SWAB_LE32(inode.size);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	320 nblocks = (nbytes + e2fs->blocksize - 1) / e2fs->blocksize;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	321
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	322 last_block_size = nbytes % e2fs->blocksize;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	323 if (last_block_size == 0)
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	324 last_block_size = e2fs->blocksize;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	325
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	326 for (i = 0; i < nblocks; i++) {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	327 if (!e2fs_inode_block(e2fs, &inode, i, &block_nr))
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	328 return NULL;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	329
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	330 if (block_nr) {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	331 if (!__READ_BLOCK(block_nr))
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	332 return NULL;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	333 } else
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	334 memset(blockbuf, 0, e2fs->blocksize);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	335
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	336 dir = search_dir_block(e2fs, blockbuf, name, namelen);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	337
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	338 if (dir != NULL)
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	339 return dir;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	340 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	341 return NULL;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	342 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	343
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	344 typedef struct ino_info {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	345 cyg_uint32 ino;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	346 cyg_uint32 parent_ino;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	347 cyg_uint8 filetype;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	348 } ino_info_t;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	349
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	350 static int e2fs_inode_lookup(e2fs_desc_t *e2fs, cyg_uint32 dir_ino,
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	351 const char pathname, ino_info_t info);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	352
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	353 // Starting from the given directory, find the inode number, filetype, and
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	354 // parent inode for the file pointed to by the given symbolic link inode.
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	355 // If successful, fills out ino_info_t and return true.
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	356 //
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	357 static int
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	358 e2fs_follow_symlink(e2fs_desc_t e2fs, cyg_uint32 dir_ino, cyg_uint32 sym_ino, ino_info_t info)
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	359 {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	360 #define MAX_SYMLINK_NAME 255
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	361 char symlink[MAX_SYMLINK_NAME+1];
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	362 int pathlen;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	363 cyg_uint32 block_nr;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	364 e2fs_inode_t inode;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	365
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	366 if (!e2fs_get_inode(e2fs, sym_ino, &inode)) {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	367 #if DEBUG_E2FS > 0
634 8285bebc3a89 Minor IDE [debug] improvements. gthomas parents: 466 diff changeset	368 diag_printf("%s: e2fs_get_inode [%d] failed\n", __FUNCTION__, sym_ino);
174 38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	369 #endif
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	370 return 0;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	371 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	372
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	373 pathlen = SWAB_LE32(inode.size);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	374 if (pathlen > MAX_SYMLINK_NAME)
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	375 return 0;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	376
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	377 if (inode.blocks) {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	378 if (!e2fs_inode_block(e2fs, &inode, 0, &block_nr))
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	379 return 0;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	380 if (block_nr) {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	381 if (!PARTITION_READ(e2fs->part, E2FS_BLOCK_TO_SECTOR(e2fs, block_nr),
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	382 blockbuf, e2fs->blocksize/SECTOR_SIZE))
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	383 return 0;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	384 memcpy(symlink, blockbuf, pathlen);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	385 } else
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	386 return 0;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	387 } else {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	388 // small enough path to fit in inode struct
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	389 memcpy(symlink, (char *)&inode.block[0], pathlen);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	390 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	391 symlink[pathlen] = 0;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	392
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	393 return e2fs_inode_lookup(e2fs, dir_ino, symlink, info);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	394 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	395
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	396
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	397 // Starting from the given directory, find the inode number, filetype, and
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	398 // parent inode for the given file pathname.
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	399 // If successful, fills out ino_info_t and return true.
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	400 //
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	401 static int
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	402 e2fs_inode_lookup(e2fs_desc_t e2fs, cyg_uint32 dir_ino, const char pathname, ino_info_t *info)
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	403 {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	404 int len, pathlen;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	405 const char *p;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	406 e2fs_dir_entry_t *dir = NULL;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	407
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	408 if (!pathname \|\| (pathlen = strlen(pathname)) == 0)
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	409 return 0;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	410
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	411 if (*pathname == '/') {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	412 if (--pathlen == 0) {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	413 info->ino = info->parent_ino = E2FS_ROOT_INO;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	414 info->filetype = E2FS_FTYPE_DIR;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	415 return 1;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	416 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	417 ++pathname;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	418 dir_ino = E2FS_ROOT_INO;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	419 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	420
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	421 while (pathlen) {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	422 // find next delimiter in path.
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	423 for (p = pathname, len = 0; len < pathlen; len++, p++) {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	424 // skip delimiter if found.
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	425 if (*p == '/') {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	426 ++p;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	427 --pathlen;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	428 break;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	429 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	430 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	431 dir = e2fs_dir_lookup(e2fs, dir_ino, pathname, len);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	432 if (dir == NULL)
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	433 return 0;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	434
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	435 pathlen -= len;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	436 pathname = p;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	437
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	438 switch (dir->filetype) {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	439 case E2FS_FTYPE_SYMLINK:
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	440 // follow the symbolic link (this will cause recursion)
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	441 if (!e2fs_follow_symlink(e2fs, dir_ino, SWAB_LE32(dir->inode), info))
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	442 return 0;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	443 if (pathlen == 0)
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	444 return 1;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	445 // must be a dir if we want to continue
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	446 if (info->filetype != E2FS_FTYPE_DIR)
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	447 return 0;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	448 dir_ino = info->ino;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	449 break;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	450
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	451 case E2FS_FTYPE_DIR:
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	452 if (pathlen)
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	453 dir_ino = SWAB_LE32(dir->inode);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	454 break;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	455
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	456 case E2FS_FTYPE_REG_FILE:
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	457 if (pathlen)
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	458 return 0; // regular file embedded in middle of path
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	459 break;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	460
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	461 case E2FS_FTYPE_UNKNOWN:
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	462 case E2FS_FTYPE_CHRDEV:
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	463 case E2FS_FTYPE_BLKDEV:
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	464 case E2FS_FTYPE_FIFO:
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	465 case E2FS_FTYPE_SOCK:
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	466 default:
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	467 return 0;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	468 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	469 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	470 info->ino = SWAB_LE32(dir->inode);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	471 info->parent_ino = dir_ino;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	472 info->filetype = dir->filetype;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	473 return 1;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	474 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	475
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	476 struct read_info {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	477 e2fs_desc_t e2fs_desc;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	478 e2fs_inode_t inode;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	479 cyg_uint32 fsize;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	480 cyg_uint32 fpos;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	481 };
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	482
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	483 static void *
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	484 e2fs_open(partition_t p, const char filepath)
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	485 {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	486 static struct read_info rinfo;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	487 ino_info_t ino_info;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	488
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	489 // mount partition
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	490 if (e2fs_mount(p, &rinfo.e2fs_desc) != 0) {
182 f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	491 diag_printf("mount failed.\n");
174 38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	492 return NULL;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	493 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	494
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	495 // find file inode
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	496 if (!e2fs_inode_lookup(&rinfo.e2fs_desc, E2FS_ROOT_INO, filepath, &ino_info)) {
182 f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	497 diag_printf("%s: e2fs_inode_lookup failed\n", __FUNCTION__);
174 38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	498 return NULL;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	499 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	500
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	501 // read inode
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	502 if (!e2fs_get_inode(&rinfo.e2fs_desc, ino_info.ino, &rinfo.inode)) {
182 f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	503 diag_printf("%s: e2fs_get_inode failed for ino[%d]\n", __FUNCTION__, ino_info.ino);
174 38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	504 return NULL;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	505 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	506
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	507 rinfo.fsize = SWAB_LE32(rinfo.inode.size);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	508 rinfo.fpos = 0;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	509
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	510 return &rinfo;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	511 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	512
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	513 static int
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	514 e2fs_read(void fp, char buf, cyg_uint32 nbytes)
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	515 {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	516 struct read_info *info = fp;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	517 e2fs_desc_t *e2fs;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	518 cyg_uint32 nread = 0, rem, block_nr, bindex, to_read;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	519
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	520 if ((info->fpos + nbytes) > info->fsize)
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	521 nbytes = info->fsize - info->fpos;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	522
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	523 e2fs = &info->e2fs_desc;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	524
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	525 // see if we need to copy leftover data from last read call
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	526 rem = e2fs->blocksize - (info->fpos % e2fs->blocksize);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	527 if (rem != e2fs->blocksize) {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	528 char p = (char )blockbuf + e2fs->blocksize - rem;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	529
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	530 if (rem > nbytes)
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	531 rem = nbytes;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	532
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	533 memcpy(buf, p, rem);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	534
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	535 nread += rem;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	536 buf += rem;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	537 info->fpos += rem;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	538 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	539
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	540 // now loop through blocks if we're not done
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	541 bindex = info->fpos / e2fs->blocksize;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	542 while (nread < nbytes) {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	543 if (!e2fs_inode_block(e2fs, &info->inode, bindex, &block_nr))
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	544 return -1;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	545
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	546 if (block_nr) {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	547 if (!PARTITION_READ(e2fs->part, E2FS_BLOCK_TO_SECTOR(e2fs, block_nr),
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	548 blockbuf, e2fs->blocksize/SECTOR_SIZE))
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	549 return 0;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	550 } else
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	551 memset(blockbuf, 0, e2fs->blocksize);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	552
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	553 to_read = nbytes - nread;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	554 if (to_read > e2fs->blocksize)
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	555 to_read = e2fs->blocksize;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	556
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	557 memcpy(buf, blockbuf, to_read);
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	558
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	559 nread += to_read;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	560 buf += to_read;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	561 info->fpos += to_read;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	562 ++bindex;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	563 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	564
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	565 return nread;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	566 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	567
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	568 #if DEBUG_E2FS > 4
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	569 static void dump_sb(struct e2fs_super_block *s)
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	570 {
182 f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	571 diag_printf("inode_count: %d\n", SWAB_LE32(s->inodes_count));
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	572 diag_printf("blocks_count: %d\n", SWAB_LE32(s->blocks_count));
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	573 diag_printf("r_blocks_count: %d\n", SWAB_LE32(s->r_blocks_count));
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	574 diag_printf("free_blocks_count: %d\n", SWAB_LE32(s->free_blocks_count));
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	575 diag_printf("free_inodes_count: %d\n", SWAB_LE32(s->free_inodes_count));
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	576 diag_printf("first_data_block: %d\n", SWAB_LE32(s->first_data_block));
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	577 diag_printf("log_block_size: %d\n", SWAB_LE32(s->log_block_size));
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	578 diag_printf("log_frag_size: %d\n", SWAB_LE32(s->log_frag_size));
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	579 diag_printf("blocks_per_group: %d\n", SWAB_LE32(s->blocks_per_group));
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	580 diag_printf("frags_per_group: %d\n", SWAB_LE32(s->frags_per_group));
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	581 diag_printf("inodes_per_group: %d\n", SWAB_LE32(s->inodes_per_group));
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	582 diag_printf("mnt_count: %d\n", SWAB_LE16(s->mnt_count));
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	583 diag_printf("max_mnt_count: %d\n", SWAB_LE16(s->max_mnt_count));
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	584 diag_printf("magic: %d\n", SWAB_LE16(s->magic));
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	585 diag_printf("state: %d\n", SWAB_LE16(s->state));
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	586 diag_printf("errors: %d\n", SWAB_LE16(s->errors));
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	587 diag_printf("minor_rev_level: %d\n", SWAB_LE16(s->minor_rev_level));
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	588 diag_printf("lastcheck: %d\n", SWAB_LE32(s->lastcheck));
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	589 diag_printf("checkinterval: %d\n", SWAB_LE32(s->checkinterval));
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	590 diag_printf("creator_os: %d\n", SWAB_LE32(s->creator_os));
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	591 diag_printf("rev_level: %d\n", SWAB_LE32(s->rev_level));
174 38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	592 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	593
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	594 static void dump_inode(struct e2fs_inode *i)
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	595 {
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	596 int j, n;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	597
182 f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	598 diag_printf("mode: %o\n", SWAB_LE16(i->mode));
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	599 diag_printf("uid: %o\n", SWAB_LE16(i->uid));
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	600 diag_printf("size: %d\n", SWAB_LE32(i->size));
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	601 diag_printf("gid: %o\n", SWAB_LE16(i->gid));
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	602 diag_printf("links: %d\n", SWAB_LE16(i->links_count));
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	603 diag_printf("blocks: %d\n", SWAB_LE32(i->blocks));
174 38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	604
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	605 n = i->blocks;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	606 if (n > E2FS_N_BLOCKS)
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	607 n = E2FS_N_BLOCKS;
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	608
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	609 for (j = 0; j < n; j++)
182 f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 174 diff changeset	610 diag_printf(" block: %d\n", SWAB_LE32(i->block[j]));
174 38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	611 }
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	612 #endif
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	613
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST jlarmour parents: diff changeset	614

Mercurial > ecos

annotate packages/redboot/current/src/fs/e2fs.c @ 2729:74dbf4c3f2e1 after-copyright-change-20090129