From fac92becdaecff64dd91daab0292c5131de92f0d Mon Sep 17 00:00:00 2001 From: Andrew Stribblehill Date: Fri, 9 Sep 2005 13:02:04 -0700 Subject: [PATCH] bfs: fix endianness, signedness; add trivial bugfix * Makes BFS code endianness-clean. * Fixes some signedness warnings. * Fixes a problem in fs/bfs/inode.c:164 where inodes not synced to disk don't get fully marked as clean. Here's how to reproduce it: # mount -o loop -t bfs /bfs.img /mnt # df -i /mnt Filesystem Inodes IUsed IFree IUse% Mounted on /bfs.img 48 1 47 3% /mnt # df -k /mnt Filesystem 1K-blocks Used Available Use% Mounted on /bfs.img 512 5 508 1% /mnt # cp 60k-archive.zip /mnt/mt.zip # df -k /mnt Filesystem 1K-blocks Used Available Use% Mounted on /bfs.img 512 65 447 13% /mnt # df -i /mnt Filesystem Inodes IUsed IFree IUse% Mounted on /bfs.img 48 2 46 5% /mnt # rm /mnt/mt.zip # echo $? 0 [If the unlink happens before the buffers flush, the following happens:] # df -i /mnt Filesystem Inodes IUsed IFree IUse% Mounted on /bfs.img 48 2 46 5% /mnt # df -k /mnt Filesystem 1K-blocks Used Available Use% Mounted on /bfs.img 512 65 447 13% /mnt fs/bfs/bfs.h | 1 Signed-off-by: Andrew Stribblehill Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/bfs/dir.c | 25 +++++++++++++------------ 1 file changed, 13 insertions(+), 12 deletions(-) (limited to 'fs/bfs/dir.c') diff --git a/fs/bfs/dir.c b/fs/bfs/dir.c index 5a1e5ce057ff..e240c335eb23 100644 --- a/fs/bfs/dir.c +++ b/fs/bfs/dir.c @@ -2,6 +2,7 @@ * fs/bfs/dir.c * BFS directory operations. * Copyright (C) 1999,2000 Tigran Aivazian + * Made endianness-clean by Andrew Stribblehill 2005 */ #include @@ -20,9 +21,9 @@ #define dprintf(x...) #endif -static int bfs_add_entry(struct inode * dir, const char * name, int namelen, int ino); +static int bfs_add_entry(struct inode * dir, const unsigned char * name, int namelen, int ino); static struct buffer_head * bfs_find_entry(struct inode * dir, - const char * name, int namelen, struct bfs_dirent ** res_dir); + const unsigned char * name, int namelen, struct bfs_dirent ** res_dir); static int bfs_readdir(struct file * f, void * dirent, filldir_t filldir) { @@ -53,7 +54,7 @@ static int bfs_readdir(struct file * f, void * dirent, filldir_t filldir) de = (struct bfs_dirent *)(bh->b_data + offset); if (de->ino) { int size = strnlen(de->name, BFS_NAMELEN); - if (filldir(dirent, de->name, size, f->f_pos, de->ino, DT_UNKNOWN) < 0) { + if (filldir(dirent, de->name, size, f->f_pos, le16_to_cpu(de->ino), DT_UNKNOWN) < 0) { brelse(bh); unlock_kernel(); return 0; @@ -107,7 +108,7 @@ static int bfs_create(struct inode * dir, struct dentry * dentry, int mode, inode->i_mapping->a_ops = &bfs_aops; inode->i_mode = mode; inode->i_ino = ino; - BFS_I(inode)->i_dsk_ino = ino; + BFS_I(inode)->i_dsk_ino = cpu_to_le16(ino); BFS_I(inode)->i_sblock = 0; BFS_I(inode)->i_eblock = 0; insert_inode_hash(inode); @@ -139,7 +140,7 @@ static struct dentry * bfs_lookup(struct inode * dir, struct dentry * dentry, st lock_kernel(); bh = bfs_find_entry(dir, dentry->d_name.name, dentry->d_name.len, &de); if (bh) { - unsigned long ino = le32_to_cpu(de->ino); + unsigned long ino = (unsigned long)le16_to_cpu(de->ino); brelse(bh); inode = iget(dir->i_sb, ino); if (!inode) { @@ -183,7 +184,7 @@ static int bfs_unlink(struct inode * dir, struct dentry * dentry) inode = dentry->d_inode; lock_kernel(); bh = bfs_find_entry(dir, dentry->d_name.name, dentry->d_name.len, &de); - if (!bh || de->ino != inode->i_ino) + if (!bh || le16_to_cpu(de->ino) != inode->i_ino) goto out_brelse; if (!inode->i_nlink) { @@ -224,7 +225,7 @@ static int bfs_rename(struct inode * old_dir, struct dentry * old_dentry, old_dentry->d_name.name, old_dentry->d_name.len, &old_de); - if (!old_bh || old_de->ino != old_inode->i_ino) + if (!old_bh || le16_to_cpu(old_de->ino) != old_inode->i_ino) goto end_rename; error = -EPERM; @@ -270,7 +271,7 @@ struct inode_operations bfs_dir_inops = { .rename = bfs_rename, }; -static int bfs_add_entry(struct inode * dir, const char * name, int namelen, int ino) +static int bfs_add_entry(struct inode * dir, const unsigned char * name, int namelen, int ino) { struct buffer_head * bh; struct bfs_dirent * de; @@ -304,7 +305,7 @@ static int bfs_add_entry(struct inode * dir, const char * name, int namelen, int } dir->i_mtime = CURRENT_TIME_SEC; mark_inode_dirty(dir); - de->ino = ino; + de->ino = cpu_to_le16((u16)ino); for (i=0; iname[i] = (i < namelen) ? name[i] : 0; mark_buffer_dirty(bh); @@ -317,7 +318,7 @@ static int bfs_add_entry(struct inode * dir, const char * name, int namelen, int return -ENOSPC; } -static inline int bfs_namecmp(int len, const char * name, const char * buffer) +static inline int bfs_namecmp(int len, const unsigned char * name, const char * buffer) { if (len < BFS_NAMELEN && buffer[len]) return 0; @@ -325,7 +326,7 @@ static inline int bfs_namecmp(int len, const char * name, const char * buffer) } static struct buffer_head * bfs_find_entry(struct inode * dir, - const char * name, int namelen, struct bfs_dirent ** res_dir) + const unsigned char * name, int namelen, struct bfs_dirent ** res_dir) { unsigned long block, offset; struct buffer_head * bh; @@ -346,7 +347,7 @@ static struct buffer_head * bfs_find_entry(struct inode * dir, } de = (struct bfs_dirent *)(bh->b_data + offset); offset += BFS_DIRENT_SIZE; - if (de->ino && bfs_namecmp(namelen, name, de->name)) { + if (le16_to_cpu(de->ino) && bfs_namecmp(namelen, name, de->name)) { *res_dir = de; return bh; } -- cgit