From efe2a4d5cf96dd37bc4782ba1880cee4ed1117c5 Mon Sep 17 00:00:00 2001 From: wdenk Date: Thu, 16 Dec 2004 21:44:03 +0000 Subject: Code cleanup. --- fs/ext2/dev.c | 151 +++++---- fs/ext2/ext2fs.c | 924 ++++++++++++++++++++++++------------------------------- 2 files changed, 468 insertions(+), 607 deletions(-) (limited to 'fs/ext2') diff --git a/fs/ext2/dev.c b/fs/ext2/dev.c index 117a44984e..35a576daa8 100644 --- a/fs/ext2/dev.c +++ b/fs/ext2/dev.c @@ -34,109 +34,96 @@ static block_dev_desc_t *ext2fs_block_dev_desc; static disk_partition_t part_info; #undef DEBUG -int ext2fs_set_blk_dev - ( - block_dev_desc_t *rbdd, - int part - ) - { - ext2fs_block_dev_desc = rbdd; +int ext2fs_set_blk_dev (block_dev_desc_t * rbdd, int part) +{ + ext2fs_block_dev_desc = rbdd; - if (part == 0) - { - /* disk doesn't use partition table */ - part_info.start = 0; - part_info.size = rbdd->lba; - part_info.blksz = rbdd->blksz; - } - else - { - if (get_partition_info (ext2fs_block_dev_desc, part, &part_info)) - { - return 0; - } + if (part == 0) { + /* disk doesn't use partition table */ + part_info.start = 0; + part_info.size = rbdd->lba; + part_info.blksz = rbdd->blksz; + } else { + if (get_partition_info + (ext2fs_block_dev_desc, part, &part_info)) { + return 0; + } } - return (part_info.size); - } + return (part_info.size); +} -int ext2fs_devread - ( - int sector, - int byte_offset, - int byte_len, - char *buf - ) - { - char sec_buf[SECTOR_SIZE]; - unsigned block_len; +int ext2fs_devread (int sector, int byte_offset, int byte_len, char *buf) { + char sec_buf[SECTOR_SIZE]; + unsigned block_len; + /* * Check partition boundaries */ - if ((sector < 0) || ((sector + ((byte_offset + byte_len - 1) >> SECTOR_BITS)) >= part_info.size)) - { -/* errnum = ERR_OUTSIDE_PART; */ - printf (" ** ext2fs_devread() read outside partition sector %d\n", sector); - return(0); + if ((sector < 0) + || ((sector + ((byte_offset + byte_len - 1) >> SECTOR_BITS)) >= + part_info.size)) { + /* errnum = ERR_OUTSIDE_PART; */ + printf (" ** ext2fs_devread() read outside partition sector %d\n", sector); + return (0); } /* * Get the read to the beginning of a partition. */ - sector += byte_offset >> SECTOR_BITS; - byte_offset &= SECTOR_SIZE - 1; + sector += byte_offset >> SECTOR_BITS; + byte_offset &= SECTOR_SIZE - 1; #if defined(DEBUG) - printf (" <%d, %d, %d>\n", sector, byte_offset, byte_len); + printf (" <%d, %d, %d>\n", sector, byte_offset, byte_len); #endif - if (ext2fs_block_dev_desc == NULL) - { - printf("** Invalid Block Device Descriptor (NULL)\n"); - return(0); + if (ext2fs_block_dev_desc == NULL) { + printf ("** Invalid Block Device Descriptor (NULL)\n"); + return (0); } - if (byte_offset != 0) - { -/* read first part which isn't aligned with start of sector */ - if (ext2fs_block_dev_desc->block_read(ext2fs_block_dev_desc->dev, part_info.start+sector, 1, (unsigned long *)sec_buf) != 1) - { - printf (" ** ext2fs_devread() read error **\n"); - return(0); - } - memcpy(buf, sec_buf+byte_offset, min(SECTOR_SIZE-byte_offset, byte_len)); - buf+=min(SECTOR_SIZE-byte_offset, byte_len); - byte_len-=min(SECTOR_SIZE-byte_offset, byte_len); - sector++; + if (byte_offset != 0) { + /* read first part which isn't aligned with start of sector */ + if (ext2fs_block_dev_desc-> + block_read (ext2fs_block_dev_desc->dev, + part_info.start + sector, 1, + (unsigned long *) sec_buf) != 1) { + printf (" ** ext2fs_devread() read error **\n"); + return (0); + } + memcpy (buf, sec_buf + byte_offset, + min (SECTOR_SIZE - byte_offset, byte_len)); + buf += min (SECTOR_SIZE - byte_offset, byte_len); + byte_len -= min (SECTOR_SIZE - byte_offset, byte_len); + sector++; } -/* read sector aligned part */ - block_len = byte_len & ~(SECTOR_SIZE-1); - if (ext2fs_block_dev_desc->block_read(ext2fs_block_dev_desc->dev, - part_info.start+sector, - block_len/SECTOR_SIZE, - (unsigned long *)buf) != block_len/SECTOR_SIZE) - { - printf (" ** ext2fs_devread() read error - block\n"); - return(0); + /* read sector aligned part */ + block_len = byte_len & ~(SECTOR_SIZE - 1); + if (ext2fs_block_dev_desc->block_read (ext2fs_block_dev_desc->dev, + part_info.start + sector, + block_len / SECTOR_SIZE, + (unsigned long *) buf) != + block_len / SECTOR_SIZE) { + printf (" ** ext2fs_devread() read error - block\n"); + return (0); } - buf+=block_len; - byte_len-=block_len; - sector+= block_len/SECTOR_SIZE; + buf += block_len; + byte_len -= block_len; + sector += block_len / SECTOR_SIZE; - if (byte_len != 0) - { -/* read rest of data which are not in whole sector */ - if (ext2fs_block_dev_desc->block_read(ext2fs_block_dev_desc->dev, - part_info.start+sector, - 1, - (unsigned long *)sec_buf) != 1) - { - printf (" ** ext2fs_devread() read error - last part\n"); - return(0); - } - memcpy(buf, sec_buf, byte_len); + if (byte_len != 0) { + /* read rest of data which are not in whole sector */ + if (ext2fs_block_dev_desc-> + block_read (ext2fs_block_dev_desc->dev, + part_info.start + sector, 1, + (unsigned long *) sec_buf) != 1) { + printf (" ** ext2fs_devread() read error - last part\n"); + return (0); + } + memcpy (buf, sec_buf, byte_len); } - return(1); - } + return (1); +} #endif /* CFG_CMD_EXT2FS */ diff --git a/fs/ext2/ext2fs.c b/fs/ext2/ext2fs.c index bae72a35a6..a2d698abc7 100644 --- a/fs/ext2/ext2fs.c +++ b/fs/ext2/ext2fs.c @@ -30,7 +30,8 @@ #include #include -extern int ext2fs_devread (int sector, int byte_offset, int byte_len, char *buf); +extern int ext2fs_devread (int sector, int byte_offset, int byte_len, + char *buf); /* Magic value used to identify an ext2 filesystem. */ #define EXT2_MAGIC 0xEF53 @@ -66,8 +67,7 @@ extern int ext2fs_devread (int sector, int byte_offset, int byte_len, char *buf) #define EXT2_BLOCK_SIZE(data) (1 << LOG2_BLOCK_SIZE(data)) /* The ext2 superblock. */ -struct ext2_sblock -{ +struct ext2_sblock { uint32_t total_inodes; uint32_t total_blocks; uint32_t reserved_blocks; @@ -106,8 +106,7 @@ struct ext2_sblock }; /* The ext2 blockgroup. */ -struct ext2_block_group -{ +struct ext2_block_group { uint32_t block_id; uint32_t inode_id; uint32_t inode_table_id; @@ -118,8 +117,7 @@ struct ext2_block_group }; /* The ext2 inode. */ -struct ext2_inode -{ +struct ext2_inode { uint16_t mode; uint16_t uid; uint32_t size; @@ -129,20 +127,18 @@ struct ext2_inode uint32_t dtime; uint16_t gid; uint16_t nlinks; - uint32_t blockcnt; /* Blocks of 512 bytes!! */ + uint32_t blockcnt; /* Blocks of 512 bytes!! */ uint32_t flags; uint32_t osd1; - union - { - struct datablocks - { + union { + struct datablocks { uint32_t dir_blocks[INDIRECT_BLOCKS]; uint32_t indir_block; uint32_t double_indir_block; uint32_t tripple_indir_block; } blocks; char symlink[60]; - } b; + } b; uint32_t version; uint32_t acl; uint32_t dir_acl; @@ -151,25 +147,22 @@ struct ext2_inode }; /* The header of an ext2 directory entry. */ -struct ext2_dirent -{ +struct ext2_dirent { uint32_t inode; uint16_t direntlen; - uint8_t namelen; - uint8_t filetype; + uint8_t namelen; + uint8_t filetype; }; -struct ext2fs_node -{ +struct ext2fs_node { struct ext2_data *data; struct ext2_inode inode; - int ino; - int inode_read; + int ino; + int inode_read; }; /* Information about a "mounted" ext2 filesystem. */ -struct ext2_data -{ +struct ext2_data { struct ext2_sblock sblock; struct ext2_inode *inode; struct ext2fs_node diropen; @@ -178,827 +171,708 @@ struct ext2_data typedef struct ext2fs_node *ext2fs_node_t; -struct ext2_data *ext2fs_root = NULL; -ext2fs_node_t ext2fs_file = NULL; -int symlinknest = 0; -uint32_t *indir1_block = NULL; -int indir1_size = 0; -int indir1_blkno = -1; -uint32_t *indir2_block = NULL; -int indir2_size = 0; -int indir2_blkno = -1; +struct ext2_data *ext2fs_root = NULL; +ext2fs_node_t ext2fs_file = NULL; +int symlinknest = 0; +uint32_t *indir1_block = NULL; +int indir1_size = 0; +int indir1_blkno = -1; +uint32_t *indir2_block = NULL; +int indir2_size = 0; +int indir2_blkno = -1; static int ext2fs_blockgroup -( - struct ext2_data *data, - int group, - struct ext2_block_group *blkgrp - ) -{ + (struct ext2_data *data, int group, struct ext2_block_group *blkgrp) { #ifdef DEBUG - printf("ext2fs read blockgroup\n"); + printf ("ext2fs read blockgroup\n"); #endif - return(ext2fs_devread (((__le32_to_cpu (data->sblock.first_data_block) + 1) << LOG2_EXT2_BLOCK_SIZE (data)), - group * sizeof (struct ext2_block_group), - sizeof (struct ext2_block_group), - (char *) blkgrp)); + return (ext2fs_devread + (((__le32_to_cpu (data->sblock.first_data_block) + + 1) << LOG2_EXT2_BLOCK_SIZE (data)), + group * sizeof (struct ext2_block_group), + sizeof (struct ext2_block_group), (char *) blkgrp)); } static int ext2fs_read_inode -( - struct ext2_data *data, - int ino, - struct ext2_inode *inode - ) -{ - struct ext2_block_group blkgrp; - struct ext2_sblock *sblock = &data->sblock; - int inodes_per_block; - int status; + (struct ext2_data *data, int ino, struct ext2_inode *inode) { + struct ext2_block_group blkgrp; + struct ext2_sblock *sblock = &data->sblock; + int inodes_per_block; + int status; - unsigned int blkno; - unsigned int blkoff; + unsigned int blkno; + unsigned int blkoff; /* It is easier to calculate if the first inode is 0. */ ino--; #ifdef DEBUG - printf("ext2fs read inode %d\n", ino); + printf ("ext2fs read inode %d\n", ino); #endif - status = ext2fs_blockgroup (data, ino / __le32_to_cpu(sblock->inodes_per_group), &blkgrp); - if (status == 0) - { - return(0); + status = ext2fs_blockgroup (data, + ino / + __le32_to_cpu (sblock->inodes_per_group), + &blkgrp); + if (status == 0) { + return (0); } inodes_per_block = EXT2_BLOCK_SIZE (data) / 128; - blkno = (ino % __le32_to_cpu (sblock->inodes_per_group)) / inodes_per_block; - blkoff = (ino % __le32_to_cpu (sblock->inodes_per_group)) % inodes_per_block; + blkno = (ino % __le32_to_cpu (sblock->inodes_per_group)) / + inodes_per_block; + blkoff = (ino % __le32_to_cpu (sblock->inodes_per_group)) % + inodes_per_block; #ifdef DEBUG - printf("ext2fs read inode blkno %d blkoff %d\n", blkno, blkoff); + printf ("ext2fs read inode blkno %d blkoff %d\n", blkno, blkoff); #endif /* Read the inode. */ - status = ext2fs_devread(((__le32_to_cpu (blkgrp.inode_table_id) + blkno) << LOG2_EXT2_BLOCK_SIZE (data)), - sizeof (struct ext2_inode) * blkoff, - sizeof (struct ext2_inode), - (char *) inode); - if (status == 0) - { - return(0); - } - return(1); + status = ext2fs_devread (((__le32_to_cpu (blkgrp.inode_table_id) + + blkno) << LOG2_EXT2_BLOCK_SIZE (data)), + sizeof (struct ext2_inode) * blkoff, + sizeof (struct ext2_inode), (char *) inode); + if (status == 0) { + return (0); + } + return (1); } -void ext2fs_free_node -( - ext2fs_node_t node, - ext2fs_node_t currroot - ) -{ - if ((node != &ext2fs_root->diropen) && (node != currroot)) - { +void ext2fs_free_node (ext2fs_node_t node, ext2fs_node_t currroot) { + if ((node != &ext2fs_root->diropen) && (node != currroot)) { free (node); } } -static int ext2fs_read_block -( - ext2fs_node_t node, - int fileblock - ) -{ - struct ext2_data *data = node->data; - struct ext2_inode *inode = &node->inode; - int blknr; - int blksz = EXT2_BLOCK_SIZE (data); - int log2_blksz = LOG2_EXT2_BLOCK_SIZE (data); - int status; +static int ext2fs_read_block (ext2fs_node_t node, int fileblock) { + struct ext2_data *data = node->data; + struct ext2_inode *inode = &node->inode; + int blknr; + int blksz = EXT2_BLOCK_SIZE (data); + int log2_blksz = LOG2_EXT2_BLOCK_SIZE (data); + int status; /* Direct blocks. */ - if (fileblock < INDIRECT_BLOCKS) - { + if (fileblock < INDIRECT_BLOCKS) { blknr = __le32_to_cpu (inode->b.blocks.dir_blocks[fileblock]); - } + } /* Indirect. */ - else if (fileblock < (INDIRECT_BLOCKS + (blksz/4))) - { - if (indir1_block == NULL) - { - indir1_block = (uint32_t *) malloc(blksz); - if (indir1_block == NULL) - { - printf("** ext2fs read block (indir 1) malloc failed. **\n"); - return(-1); + else if (fileblock < (INDIRECT_BLOCKS + (blksz / 4))) { + if (indir1_block == NULL) { + indir1_block = (uint32_t *) malloc (blksz); + if (indir1_block == NULL) { + printf ("** ext2fs read block (indir 1) malloc failed. **\n"); + return (-1); } - indir1_size = blksz; + indir1_size = blksz; indir1_blkno = -1; } - if (blksz != indir1_size) - { - free(indir1_block); + if (blksz != indir1_size) { + free (indir1_block); indir1_block = NULL; - indir1_size = 0; + indir1_size = 0; indir1_blkno = -1; - indir1_block = (uint32_t *) malloc(blksz); - if (indir1_block == NULL) - { - printf("** ext2fs read block (indir 1) malloc failed. **\n"); - return(-1); + indir1_block = (uint32_t *) malloc (blksz); + if (indir1_block == NULL) { + printf ("** ext2fs read block (indir 1) malloc failed. **\n"); + return (-1); } - indir1_size = blksz; + indir1_size = blksz; } - if ((__le32_to_cpu(inode->b.blocks.indir_block) << log2_blksz) != indir1_blkno) - { - status = ext2fs_devread (__le32_to_cpu(inode->b.blocks.indir_block) << log2_blksz, 0, blksz, (char *) indir1_block); - if (status == 0) - { - printf("** ext2fs read block (indir 1) failed. **\n"); - return(0); + if ((__le32_to_cpu (inode->b.blocks.indir_block) << + log2_blksz) != indir1_blkno) { + status = ext2fs_devread (__le32_to_cpu(inode->b.blocks.indir_block) << log2_blksz, + 0, blksz, + (char *) indir1_block); + if (status == 0) { + printf ("** ext2fs read block (indir 1) failed. **\n"); + return (0); } - indir1_blkno = __le32_to_cpu(inode->b.blocks.indir_block) << log2_blksz; + indir1_blkno = + __le32_to_cpu (inode->b.blocks. + indir_block) << log2_blksz; } - blknr = __le32_to_cpu(indir1_block[fileblock - INDIRECT_BLOCKS]); + blknr = __le32_to_cpu (indir1_block + [fileblock - INDIRECT_BLOCKS]); } /* Double indirect. */ - else if (fileblock < (INDIRECT_BLOCKS + (blksz / 4 * (blksz / 4 + 1)))) - { + else if (fileblock < + (INDIRECT_BLOCKS + (blksz / 4 * (blksz / 4 + 1)))) { unsigned int perblock = blksz / 4; unsigned int rblock = fileblock - (INDIRECT_BLOCKS + blksz / 4); - if (indir1_block == NULL) - { - indir1_block = (uint32_t *) malloc(blksz); - if (indir1_block == NULL) - { - printf("** ext2fs read block (indir 2 1) malloc failed. **\n"); - return(-1); + if (indir1_block == NULL) { + indir1_block = (uint32_t *) malloc (blksz); + if (indir1_block == NULL) { + printf ("** ext2fs read block (indir 2 1) malloc failed. **\n"); + return (-1); } - indir1_size = blksz; + indir1_size = blksz; indir1_blkno = -1; } - if (blksz != indir1_size) - { - free(indir1_block); + if (blksz != indir1_size) { + free (indir1_block); indir1_block = NULL; - indir1_size = 0; + indir1_size = 0; indir1_blkno = -1; - indir1_block = (uint32_t *) malloc(blksz); - if (indir1_block == NULL) - { - printf("** ext2fs read block (indir 2 1) malloc failed. **\n"); - return(-1); + indir1_block = (uint32_t *) malloc (blksz); + if (indir1_block == NULL) { + printf ("** ext2fs read block (indir 2 1) malloc failed. **\n"); + return (-1); } - indir1_size = blksz; + indir1_size = blksz; } - if ((__le32_to_cpu(inode->b.blocks.double_indir_block) << log2_blksz) != indir1_blkno) - { - status = ext2fs_devread (__le32_to_cpu(inode->b.blocks.double_indir_block) << log2_blksz, 0, blksz, (char *) indir1_block); - if (status == 0) - { - printf("** ext2fs read block (indir 2 1) failed. **\n"); - return(-1); + if ((__le32_to_cpu (inode->b.blocks.double_indir_block) << + log2_blksz) != indir1_blkno) { + status = ext2fs_devread (__le32_to_cpu(inode->b.blocks.double_indir_block) << log2_blksz, + 0, blksz, + (char *) indir1_block); + if (status == 0) { + printf ("** ext2fs read block (indir 2 1) failed. **\n"); + return (-1); } - indir1_blkno = __le32_to_cpu(inode->b.blocks.double_indir_block) << log2_blksz; + indir1_blkno = + __le32_to_cpu (inode->b.blocks.double_indir_block) << log2_blksz; } - if (indir2_block == NULL) - { - indir2_block = (uint32_t *) malloc(blksz); - if (indir2_block == NULL) - { - printf("** ext2fs read block (indir 2 2) malloc failed. **\n"); - return(-1); + if (indir2_block == NULL) { + indir2_block = (uint32_t *) malloc (blksz); + if (indir2_block == NULL) { + printf ("** ext2fs read block (indir 2 2) malloc failed. **\n"); + return (-1); } - indir2_size = blksz; + indir2_size = blksz; indir2_blkno = -1; } - if (blksz != indir2_size) - { - free(indir2_block); + if (blksz != indir2_size) { + free (indir2_block); indir2_block = NULL; - indir2_size = 0; + indir2_size = 0; indir2_blkno = -1; - indir2_block = (uint32_t *) malloc(blksz); - if (indir2_block == NULL) - { - printf("** ext2fs read block (indir 2 2) malloc failed. **\n"); - return(-1); + indir2_block = (uint32_t *) malloc (blksz); + if (indir2_block == NULL) { + printf ("** ext2fs read block (indir 2 2) malloc failed. **\n"); + return (-1); } - indir2_size = blksz; + indir2_size = blksz; } - if ((__le32_to_cpu(indir1_block[rblock / perblock]) << log2_blksz) != indir1_blkno) - { - status = ext2fs_devread(__le32_to_cpu(indir1_block[rblock / perblock]) << log2_blksz, 0, blksz, (char *) indir2_block); - if (status == 0) - { - printf("** ext2fs read block (indir 2 2) failed. **\n"); - return(-1); + if ((__le32_to_cpu (indir1_block[rblock / perblock]) << + log2_blksz) != indir1_blkno) { + status = ext2fs_devread (__le32_to_cpu(indir1_block[rblock / perblock]) << log2_blksz, + 0, blksz, + (char *) indir2_block); + if (status == 0) { + printf ("** ext2fs read block (indir 2 2) failed. **\n"); + return (-1); } - indir2_blkno = __le32_to_cpu(indir1_block[rblock / perblock]) << log2_blksz; + indir2_blkno = + __le32_to_cpu (indir1_block[rblock / perblock]) << log2_blksz; } - blknr = __le32_to_cpu(indir2_block[rblock % perblock]); + blknr = __le32_to_cpu (indir2_block[rblock % perblock]); } /* Tripple indirect. */ - else - { - printf("** ext2fs doesn't support tripple indirect blocks. **\n"); - return(-1); - } + else { + printf ("** ext2fs doesn't support tripple indirect blocks. **\n"); + return (-1); + } #ifdef DEBUG - printf("ext2fs_read_block %08x\n", blknr); + printf ("ext2fs_read_block %08x\n", blknr); #endif - return(blknr); + return (blknr); } int ext2fs_read_file -( - ext2fs_node_t node, - int pos, - unsigned int len, - char *buf - ) -{ - int i; - int blockcnt; - int log2blocksize = LOG2_EXT2_BLOCK_SIZE (node->data); - int blocksize = 1 << (log2blocksize + DISK_SECTOR_BITS); - unsigned int filesize = node->inode.size; + (ext2fs_node_t node, int pos, unsigned int len, char *buf) { + int i; + int blockcnt; + int log2blocksize = LOG2_EXT2_BLOCK_SIZE (node->data); + int blocksize = 1 << (log2blocksize + DISK_SECTOR_BITS); + unsigned int filesize = node->inode.size; /* Adjust len so it we can't read past the end of the file. */ - if (len > filesize) - { + if (len > filesize) { len = filesize; } - blockcnt = ((len + pos) + blocksize - 1) / blocksize; + blockcnt = ((len + pos) + blocksize - 1) / blocksize; - for (i = pos / blocksize; i < blockcnt; i++) - { + for (i = pos / blocksize; i < blockcnt; i++) { int blknr; int blockoff = pos % blocksize; int blockend = blocksize; int skipfirst = 0; - blknr = ext2fs_read_block(node, i); - if (blknr < 0) - { - return(-1); + blknr = ext2fs_read_block (node, i); + if (blknr < 0) { + return (-1); } blknr = blknr << log2blocksize; /* Last block. */ - if (i == blockcnt - 1) - { + if (i == blockcnt - 1) { blockend = (len + pos) % blocksize; /* The last portion is exactly blocksize. */ - if (!blockend) - { + if (!blockend) { blockend = blocksize; } } /* First block. */ - if (i == pos / blocksize) - { + if (i == pos / blocksize) { skipfirst = blockoff; blockend -= skipfirst; } /* If the block number is 0 this block is not stored on disk but is zero filled instead. */ - if (blknr) - { + if (blknr) { int status; status = ext2fs_devread (blknr, skipfirst, blockend, buf); - if (status == 0) - { - return(-1); + if (status == 0) { + return (-1); } - } - else - { + } else { memset (buf, blocksize - skipfirst, 0); } buf += blocksize - skipfirst; - } - return(len); + } + return (len); } -static int ext2fs_iterate_dir -( - ext2fs_node_t dir, - char *name, - ext2fs_node_t *fnode, - int *ftype - ) +static int ext2fs_iterate_dir (ext2fs_node_t dir, char *name, ext2fs_node_t * fnode, int *ftype) { unsigned int fpos = 0; - int status; + int status; struct ext2fs_node *diro = (struct ext2fs_node *) dir; + #ifdef DEBUG - if (name != NULL) printf("Iterate dir %s\n", name); + if (name != NULL) + printf ("Iterate dir %s\n", name); #endif /* of DEBUG */ - if (!diro->inode_read) - { - status = ext2fs_read_inode (diro->data, diro->ino, &diro->inode); - if (status == 0) - { - return(0); + if (!diro->inode_read) { + status = ext2fs_read_inode (diro->data, diro->ino, + &diro->inode); + if (status == 0) { + return (0); } } /* Search the file. */ - while (fpos < __le32_to_cpu (diro->inode.size)) - { + while (fpos < __le32_to_cpu (diro->inode.size)) { struct ext2_dirent dirent; - status = ext2fs_read_file (diro, fpos, sizeof (struct ext2_dirent), (char *) &dirent); - if (status < 1) - { - return(0); + status = ext2fs_read_file (diro, fpos, + sizeof (struct ext2_dirent), + (char *) &dirent); + if (status < 1) { + return (0); } - if (dirent.namelen != 0) - { - char filename[dirent.namelen + 1]; - ext2fs_node_t fdiro; - int type = FILETYPE_UNKNOWN; - - status = ext2fs_read_file (diro, fpos + sizeof (struct ext2_dirent), dirent.namelen, filename); - if (status < 1) - { - return(0); + if (dirent.namelen != 0) { + char filename[dirent.namelen + 1]; + ext2fs_node_t fdiro; + int type = FILETYPE_UNKNOWN; + + status = ext2fs_read_file (diro, + fpos + sizeof (struct ext2_dirent), + dirent.namelen, filename); + if (status < 1) { + return (0); } fdiro = malloc (sizeof (struct ext2fs_node)); - if (!fdiro) - { - return(0); + if (!fdiro) { + return (0); } fdiro->data = diro->data; - fdiro->ino = __le32_to_cpu(dirent.inode); + fdiro->ino = __le32_to_cpu (dirent.inode); filename[dirent.namelen] = '\0'; - if (dirent.filetype != FILETYPE_UNKNOWN) - { + if (dirent.filetype != FILETYPE_UNKNOWN) { fdiro->inode_read = 0; - if (dirent.filetype == FILETYPE_DIRECTORY) - { + if (dirent.filetype == FILETYPE_DIRECTORY) { type = FILETYPE_DIRECTORY; - } - else if (dirent.filetype == FILETYPE_SYMLINK) - { + } else if (dirent.filetype == + FILETYPE_SYMLINK) { type = FILETYPE_SYMLINK; + } else if (dirent.filetype == FILETYPE_REG) { + type = FILETYPE_REG; } - else if (dirent.filetype == FILETYPE_REG) - { - type = FILETYPE_REG; - } - } - else - { + } else { /* The filetype can not be read from the dirent, get it from inode */ - status = ext2fs_read_inode (diro->data, __le32_to_cpu (dirent.inode), &fdiro->inode); - if (status == 0) - { - free(fdiro); - return(0); + status = ext2fs_read_inode (diro->data, + __le32_to_cpu(dirent.inode), + &fdiro->inode); + if (status == 0) { + free (fdiro); + return (0); } fdiro->inode_read = 1; - if ((__le16_to_cpu (fdiro->inode.mode) & FILETYPE_INO_MASK) == FILETYPE_INO_DIRECTORY) - { + if ((__le16_to_cpu (fdiro->inode.mode) & + FILETYPE_INO_MASK) == + FILETYPE_INO_DIRECTORY) { type = FILETYPE_DIRECTORY; - } - else if ((__le16_to_cpu (fdiro->inode.mode) & FILETYPE_INO_MASK) == FILETYPE_INO_SYMLINK) - { + } else if ((__le16_to_cpu (fdiro->inode.mode) + & FILETYPE_INO_MASK) == + FILETYPE_INO_SYMLINK) { type = FILETYPE_SYMLINK; - } - else if ((__le16_to_cpu (fdiro->inode.mode) & FILETYPE_INO_MASK) == FILETYPE_INO_REG) - { + } else if ((__le16_to_cpu (fdiro->inode.mode) + & FILETYPE_INO_MASK) == + FILETYPE_INO_REG) { type = FILETYPE_REG; } } #ifdef DEBUG - printf("iterate >%s<\n", filename); + printf ("iterate >%s<\n", filename); #endif /* of DEBUG */ - if ((name != NULL) && (fnode != NULL) && (ftype != NULL)) - { - if(strcmp(filename, name) == 0) - { + if ((name != NULL) && (fnode != NULL) + && (ftype != NULL)) { + if (strcmp (filename, name) == 0) { *ftype = type; *fnode = fdiro; - return(1); + return (1); } - } - else - { - if (fdiro->inode_read == 0) - { - status = ext2fs_read_inode (diro->data, __le32_to_cpu (dirent.inode), &fdiro->inode); - if (status == 0) - { - free(fdiro); - return(0); + } else { + if (fdiro->inode_read == 0) { + status = ext2fs_read_inode (diro->data, + __le32_to_cpu (dirent.inode), + &fdiro->inode); + if (status == 0) { + free (fdiro); + return (0); } fdiro->inode_read = 1; } - switch(type) - { + switch (type) { case FILETYPE_DIRECTORY: - printf(" "); + printf (" "); break; case FILETYPE_SYMLINK: - printf(" "); + printf (" "); break; case FILETYPE_REG: - printf(" "); + printf (" "); break; default: - printf(" "); + printf (" "); break; } - printf("%10d %s\n", __le32_to_cpu(fdiro->inode.size), filename); + printf ("%10d %s\n", + __le32_to_cpu (fdiro->inode.size), + filename); } - free(fdiro); + free (fdiro); } fpos += __le16_to_cpu (dirent.direntlen); } - return(0); + return (0); } -static char *ext2fs_read_symlink -( - ext2fs_node_t node - ) -{ - char *symlink; +static char *ext2fs_read_symlink (ext2fs_node_t node) { + char *symlink; struct ext2fs_node *diro = node; - int status; - - if (!diro->inode_read) - { - status = ext2fs_read_inode (diro->data, diro->ino, &diro->inode); - if (status == 0) - { - return(0); + int status; + + if (!diro->inode_read) { + status = ext2fs_read_inode (diro->data, diro->ino, + &diro->inode); + if (status == 0) { + return (0); } } symlink = malloc (__le32_to_cpu (diro->inode.size) + 1); - if (!symlink) - { - return(0); + if (!symlink) { + return (0); } /* If the filesize of the symlink is bigger than 60 the symlink is stored in a separate block, otherwise it is stored in the inode. */ - if (__le32_to_cpu (diro->inode.size) <= 60) - { - strncpy (symlink, diro->inode.b.symlink, __le32_to_cpu (diro->inode.size)); - } - else - { - status = ext2fs_read_file (diro, 0, __le32_to_cpu (diro->inode.size), symlink); - if (status == 0) - { + if (__le32_to_cpu (diro->inode.size) <= 60) { + strncpy (symlink, diro->inode.b.symlink, + __le32_to_cpu (diro->inode.size)); + } else { + status = ext2fs_read_file (diro, 0, + __le32_to_cpu (diro->inode.size), + symlink); + if (status == 0) { free (symlink); - return(0); + return (0); } } symlink[__le32_to_cpu (diro->inode.size)] = '\0'; - return(symlink); + return (symlink); } int ext2fs_find_file1 -( - const char *currpath, - ext2fs_node_t currroot, - ext2fs_node_t *currfound, - int *foundtype - ) -{ - char fpath[strlen (currpath) + 1]; - char *name = fpath; - char *next; - int status; - int type = FILETYPE_DIRECTORY; - ext2fs_node_t currnode = currroot; - ext2fs_node_t oldnode = currroot; + (const char *currpath, + ext2fs_node_t currroot, ext2fs_node_t * currfound, int *foundtype) { + char fpath[strlen (currpath) + 1]; + char *name = fpath; + char *next; + int status; + int type = FILETYPE_DIRECTORY; + ext2fs_node_t currnode = currroot; + ext2fs_node_t oldnode = currroot; strncpy (fpath, currpath, strlen (currpath) + 1); /* Remove all leading slashes. */ - while (*name == '/') - { + while (*name == '/') { name++; - } - if (!*name) - { + } + if (!*name) { *currfound = currnode; - return(1); + return (1); } - for (;;) - { + for (;;) { int found; /* Extract the actual part from the pathname. */ next = strchr (name, '/'); - if (next) - { + if (next) { /* Remove all leading slashes. */ - while (*next == '/') - { + while (*next == '/') { *(next++) = '\0'; } } /* At this point it is expected that the current node is a directory, check if this is true. */ - if (type != FILETYPE_DIRECTORY) - { + if (type != FILETYPE_DIRECTORY) { ext2fs_free_node (currnode, currroot); - return(0); + return (0); } oldnode = currnode; /* Iterate over the directory. */ found = ext2fs_iterate_dir (currnode, name, &currnode, &type); - if (found == 0) - { - return(0); + if (found == 0) { + return (0); } - if (found == -1) - { + if (found == -1) { break; } /* Read in the symlink and follow it. */ - if (type == FILETYPE_SYMLINK) - { + if (type == FILETYPE_SYMLINK) { char *symlink; /* Test if the symlink does not loop. */ - if (++symlinknest == 8) - { + if (++symlinknest == 8) { ext2fs_free_node (currnode, currroot); - ext2fs_free_node (oldnode, currroot); - return(0); + ext2fs_free_node (oldnode, currroot); + return (0); } symlink = ext2fs_read_symlink (currnode); ext2fs_free_node (currnode, currroot); - if (!symlink) - { + if (!symlink) { ext2fs_free_node (oldnode, currroot); - return(0); + return (0); } #ifdef DEBUG - printf("Got symlink >%s<\n",symlink); + printf ("Got symlink >%s<\n", symlink); #endif /* of DEBUG */ /* The symlink is an absolute path, go back to the root inode. */ - if (symlink[0] == '/') - { + if (symlink[0] == '/') { ext2fs_free_node (oldnode, currroot); oldnode = &ext2fs_root->diropen; } /* Lookup the node the symlink points to. */ - status = ext2fs_find_file1 (symlink, oldnode, &currnode, &type); + status = ext2fs_find_file1 (symlink, oldnode, + &currnode, &type); free (symlink); - if (status == 0) - { + if (status == 0) { ext2fs_free_node (oldnode, currroot); - return(0); + return (0); } } ext2fs_free_node (oldnode, currroot); /* Found the node! */ - if (!next || *next == '\0') - { + if (!next || *next == '\0') { *currfound = currnode; *foundtype = type; - return(1); + return (1); } name = next; } - return(-1); + return (-1); } int ext2fs_find_file -( - const char *path, - ext2fs_node_t rootnode, - ext2fs_node_t *foundnode, - int expecttype - ) -{ + (const char *path, + ext2fs_node_t rootnode, ext2fs_node_t * foundnode, int expecttype) { int status; int foundtype = FILETYPE_DIRECTORY; symlinknest = 0; - if (!path || path[0] != '/') - { - return(0); + if (!path || path[0] != '/') { + return (0); } - status = ext2fs_find_file1(path, rootnode, foundnode, &foundtype); - if (status == 0) - { - return(0); + status = ext2fs_find_file1 (path, rootnode, foundnode, &foundtype); + if (status == 0) { + return (0); } /* Check if the node that was found was of the expected type. */ - if ((expecttype == FILETYPE_REG) && (foundtype != expecttype)) - { - return(0); - } - else if ((expecttype == FILETYPE_DIRECTORY) && (foundtype != expecttype)) - { - return(0); + if ((expecttype == FILETYPE_REG) && (foundtype != expecttype)) { + return (0); + } else if ((expecttype == FILETYPE_DIRECTORY) + && (foundtype != expecttype)) { + return (0); } - return(1); + return (1); } -int ext2fs_ls -( - char *dirname - ) -{ +int ext2fs_ls (char *dirname) { ext2fs_node_t dirnode; - int status; - - if (ext2fs_root == NULL) - { - return(0); - } - - status = ext2fs_find_file(dirname, &ext2fs_root->diropen, &dirnode, FILETYPE_DIRECTORY); - if (status != 1) - { - printf("** Can not find directory. **\n"); - return(1); - } - ext2fs_iterate_dir(dirnode, NULL, NULL, NULL); - ext2fs_free_node(dirnode, &ext2fs_root->diropen); - return(0); + int status; + + if (ext2fs_root == NULL) { + return (0); + } + + status = ext2fs_find_file (dirname, &ext2fs_root->diropen, &dirnode, + FILETYPE_DIRECTORY); + if (status != 1) { + printf ("** Can not find directory. **\n"); + return (1); + } + ext2fs_iterate_dir (dirnode, NULL, NULL, NULL); + ext2fs_free_node (dirnode, &ext2fs_root->diropen); + return (0); } -int ext2fs_open -( - char *filename - ) -{ - ext2fs_node_t fdiro = NULL; - int status; - int len; +int ext2fs_open (char *filename) { + ext2fs_node_t fdiro = NULL; + int status; + int len; - if (ext2fs_root == NULL) - { - return(0); + if (ext2fs_root == NULL) { + return (0); } ext2fs_file = NULL; - status = ext2fs_find_file (filename, &ext2fs_root->diropen, &fdiro, FILETYPE_REG); - if (status == 0) - { + status = ext2fs_find_file (filename, &ext2fs_root->diropen, &fdiro, + FILETYPE_REG); + if (status == 0) { goto fail; } - if (!fdiro->inode_read) - { - status = ext2fs_read_inode (fdiro->data, fdiro->ino, &fdiro->inode); - if (status == 0) - { + if (!fdiro->inode_read) { + status = ext2fs_read_inode (fdiro->data, fdiro->ino, + &fdiro->inode); + if (status == 0) { goto fail; } } len = __le32_to_cpu (fdiro->inode.size); ext2fs_file = fdiro; - return(len); + return (len); - fail: - ext2fs_free_node(fdiro, &ext2fs_root->diropen); - return(0); + fail: + ext2fs_free_node (fdiro, &ext2fs_root->diropen); + return (0); } -int ext2fs_close -( - void - ) -{ - if ((ext2fs_file != NULL) && (ext2fs_root != NULL)) - { - ext2fs_free_node(ext2fs_file, &ext2fs_root->diropen); +int ext2fs_close (void + ) { + if ((ext2fs_file != NULL) && (ext2fs_root != NULL)) { + ext2fs_free_node (ext2fs_file, &ext2fs_root->diropen); ext2fs_file = NULL; } - if (ext2fs_root != NULL) - { - free(ext2fs_root); - ext2fs_root = NULL; - } - if (indir1_block != NULL) - { - free(indir1_block); - indir1_block = NULL; - indir1_size = 0; - indir1_blkno = -1; - } - if (indir2_block != NULL) - { - free(indir2_block); - indir2_block = NULL; - indir2_size = 0; - indir2_blkno = -1; - } - return(0); + if (ext2fs_root != NULL) { + free (ext2fs_root); + ext2fs_root = NULL; + } + if (indir1_block != NULL) { + free (indir1_block); + indir1_block = NULL; + indir1_size = 0; + indir1_blkno = -1; + } + if (indir2_block != NULL) { + free (indir2_block); + indir2_block = NULL; + indir2_size = 0; + indir2_blkno = -1; + } + return (0); } -int ext2fs_read -( - char *buf, - unsigned len - ) -{ +int ext2fs_read (char *buf, unsigned len) { int status; - if (ext2fs_root == NULL) - { - return(0); + if (ext2fs_root == NULL) { + return (0); } - if (ext2fs_file == NULL) - { - return(0); + if (ext2fs_file == NULL) { + return (0); } - status = ext2fs_read_file(ext2fs_file, 0, len, buf); - return(status); + status = ext2fs_read_file (ext2fs_file, 0, len, buf); + return (status); } -int ext2fs_mount -( - unsigned part_length - ) -{ +int ext2fs_mount (unsigned part_length) { struct ext2_data *data; - int status; + int status; data = malloc (sizeof (struct ext2_data)); - if (!data) - { - return(0); + if (!data) { + return (0); } /* Read the superblock. */ - status = ext2fs_devread (1 * 2, 0, sizeof (struct ext2_sblock), (char *) &data->sblock); - if (status == 0) - { + status = ext2fs_devread (1 * 2, 0, sizeof (struct ext2_sblock), + (char *) &data->sblock); + if (status == 0) { goto fail; } /* Make sure this is an ext2 filesystem. */ - if (__le16_to_cpu (data->sblock.magic) != EXT2_MAGIC) - { + if (__le16_to_cpu (data->sblock.magic) != EXT2_MAGIC) { goto fail; } - data->diropen.data = data; - data->diropen.ino = 2; - data->diropen.inode_read = 1; - data->inode = &data->diropen.inode; + data->diropen.data = data; + data->diropen.ino = 2; + data->diropen.inode_read = 1; + data->inode = &data->diropen.inode; status = ext2fs_read_inode (data, 2, data->inode); - if (status == 0) - { + if (status == 0) { goto fail; } ext2fs_root = data; - return(1); + return (1); - fail: - printf("Failed to mount ext2 filesystem...\n"); - free(data); +fail: + printf ("Failed to mount ext2 filesystem...\n"); + free (data); ext2fs_root = NULL; - return(0); + return (0); } #endif /* CFG_CMD_EXT2FS */ -- cgit v1.2.1