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fs/befs/linuxvfs.c
24.2 KB
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/* * linux/fs/befs/linuxvfs.c * * Copyright (C) 2001 Will Dyson <will_dyson@pobox.com * */ #include <linux/module.h> #include <linux/slab.h> #include <linux/fs.h> #include <linux/errno.h> #include <linux/stat.h> #include <linux/nls.h> #include <linux/buffer_head.h> #include <linux/vfs.h> #include <linux/parser.h> #include <linux/namei.h> #include "befs.h" #include "btree.h" #include "inode.h" #include "datastream.h" #include "super.h" #include "io.h" |
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MODULE_DESCRIPTION("BeOS File System (BeFS) driver"); MODULE_AUTHOR("Will Dyson"); MODULE_LICENSE("GPL"); /* The units the vfs expects inode->i_blocks to be in */ #define VFS_BLOCK_SIZE 512 static int befs_readdir(struct file *, void *, filldir_t); static int befs_get_block(struct inode *, sector_t, struct buffer_head *, int); static int befs_readpage(struct file *file, struct page *page); static sector_t befs_bmap(struct address_space *mapping, sector_t block); static struct dentry *befs_lookup(struct inode *, struct dentry *, struct nameidata *); |
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static struct inode *befs_iget(struct super_block *, unsigned long); |
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static struct inode *befs_alloc_inode(struct super_block *sb); static void befs_destroy_inode(struct inode *inode); static int befs_init_inodecache(void); static void befs_destroy_inodecache(void); |
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static void *befs_follow_link(struct dentry *, struct nameidata *); static void befs_put_link(struct dentry *, struct nameidata *, void *); |
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static int befs_utf2nls(struct super_block *sb, const char *in, int in_len, char **out, int *out_len); static int befs_nls2utf(struct super_block *sb, const char *in, int in_len, char **out, int *out_len); static void befs_put_super(struct super_block *); static int befs_remount(struct super_block *, int *, char *); |
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static int befs_statfs(struct dentry *, struct kstatfs *); |
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static int parse_options(char *, befs_mount_options *); static const struct super_operations befs_sops = { |
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.alloc_inode = befs_alloc_inode, /* allocate a new inode */ .destroy_inode = befs_destroy_inode, /* deallocate an inode */ .put_super = befs_put_super, /* uninit super */ .statfs = befs_statfs, /* statfs */ .remount_fs = befs_remount, |
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.show_options = generic_show_options, |
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}; /* slab cache for befs_inode_info objects */ |
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static struct kmem_cache *befs_inode_cachep; |
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|
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static const struct file_operations befs_dir_operations = { |
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.read = generic_read_dir, .readdir = befs_readdir, |
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.llseek = generic_file_llseek, |
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}; |
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static const struct inode_operations befs_dir_inode_operations = { |
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.lookup = befs_lookup, }; |
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static const struct address_space_operations befs_aops = { |
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.readpage = befs_readpage, |
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.bmap = befs_bmap, }; |
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static const struct inode_operations befs_symlink_inode_operations = { |
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.readlink = generic_readlink, .follow_link = befs_follow_link, .put_link = befs_put_link, }; /* * Called by generic_file_read() to read a page of data * * In turn, simply calls a generic block read function and * passes it the address of befs_get_block, for mapping file * positions to disk blocks. */ static int befs_readpage(struct file *file, struct page *page) { return block_read_full_page(page, befs_get_block); } static sector_t befs_bmap(struct address_space *mapping, sector_t block) { return generic_block_bmap(mapping, block, befs_get_block); } /* * Generic function to map a file position (block) to a * disk offset (passed back in bh_result). * * Used by many higher level functions. * * Calls befs_fblock2brun() in datastream.c to do the real work. * * -WD 10-26-01 */ static int befs_get_block(struct inode *inode, sector_t block, struct buffer_head *bh_result, int create) { struct super_block *sb = inode->i_sb; befs_data_stream *ds = &BEFS_I(inode)->i_data.ds; befs_block_run run = BAD_IADDR; int res = 0; ulong disk_off; befs_debug(sb, "---> befs_get_block() for inode %lu, block %ld", inode->i_ino, block); if (block < 0) { befs_error(sb, "befs_get_block() was asked for a block " "number less than zero: block %ld in inode %lu", block, inode->i_ino); return -EIO; } if (create) { befs_error(sb, "befs_get_block() was asked to write to " "block %ld in inode %lu", block, inode->i_ino); return -EPERM; } res = befs_fblock2brun(sb, ds, block, &run); if (res != BEFS_OK) { befs_error(sb, "<--- befs_get_block() for inode %lu, block " "%ld ERROR", inode->i_ino, block); return -EFBIG; } disk_off = (ulong) iaddr2blockno(sb, &run); map_bh(bh_result, inode->i_sb, disk_off); befs_debug(sb, "<--- befs_get_block() for inode %lu, block %ld, " "disk address %lu", inode->i_ino, block, disk_off); return 0; } static struct dentry * befs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd) { struct inode *inode = NULL; struct super_block *sb = dir->i_sb; befs_data_stream *ds = &BEFS_I(dir)->i_data.ds; befs_off_t offset; int ret; int utfnamelen; char *utfname; const char *name = dentry->d_name.name; befs_debug(sb, "---> befs_lookup() " "name %s inode %ld", dentry->d_name.name, dir->i_ino); /* Convert to UTF-8 */ if (BEFS_SB(sb)->nls) { ret = befs_nls2utf(sb, name, strlen(name), &utfname, &utfnamelen); if (ret < 0) { befs_debug(sb, "<--- befs_lookup() ERROR"); return ERR_PTR(ret); } ret = befs_btree_find(sb, ds, utfname, &offset); kfree(utfname); } else { ret = befs_btree_find(sb, ds, dentry->d_name.name, &offset); } if (ret == BEFS_BT_NOT_FOUND) { befs_debug(sb, "<--- befs_lookup() %s not found", dentry->d_name.name); return ERR_PTR(-ENOENT); } else if (ret != BEFS_OK || offset == 0) { befs_warning(sb, "<--- befs_lookup() Error"); return ERR_PTR(-ENODATA); } |
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inode = befs_iget(dir->i_sb, (ino_t) offset); if (IS_ERR(inode)) return ERR_CAST(inode); |
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d_add(dentry, inode); befs_debug(sb, "<--- befs_lookup()"); return NULL; } static int befs_readdir(struct file *filp, void *dirent, filldir_t filldir) { |
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struct inode *inode = filp->f_path.dentry->d_inode; |
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struct super_block *sb = inode->i_sb; befs_data_stream *ds = &BEFS_I(inode)->i_data.ds; befs_off_t value; int result; size_t keysize; unsigned char d_type; char keybuf[BEFS_NAME_LEN + 1]; char *nlsname; int nlsnamelen; |
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const char *dirname = filp->f_path.dentry->d_name.name; |
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befs_debug(sb, "---> befs_readdir() " "name %s, inode %ld, filp->f_pos %Ld", dirname, inode->i_ino, filp->f_pos); result = befs_btree_read(sb, ds, filp->f_pos, BEFS_NAME_LEN + 1, keybuf, &keysize, &value); if (result == BEFS_ERR) { befs_debug(sb, "<--- befs_readdir() ERROR"); befs_error(sb, "IO error reading %s (inode %lu)", dirname, inode->i_ino); return -EIO; } else if (result == BEFS_BT_END) { befs_debug(sb, "<--- befs_readdir() END"); return 0; } else if (result == BEFS_BT_EMPTY) { befs_debug(sb, "<--- befs_readdir() Empty directory"); return 0; } d_type = DT_UNKNOWN; /* Convert to NLS */ if (BEFS_SB(sb)->nls) { result = befs_utf2nls(sb, keybuf, keysize, &nlsname, &nlsnamelen); if (result < 0) { befs_debug(sb, "<--- befs_readdir() ERROR"); return result; } result = filldir(dirent, nlsname, nlsnamelen, filp->f_pos, (ino_t) value, d_type); kfree(nlsname); } else { result = filldir(dirent, keybuf, keysize, filp->f_pos, (ino_t) value, d_type); } filp->f_pos++; befs_debug(sb, "<--- befs_readdir() filp->f_pos %Ld", filp->f_pos); return 0; } static struct inode * befs_alloc_inode(struct super_block *sb) { struct befs_inode_info *bi; bi = (struct befs_inode_info *)kmem_cache_alloc(befs_inode_cachep, |
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GFP_KERNEL); |
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if (!bi) return NULL; return &bi->vfs_inode; } |
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static void befs_i_callback(struct rcu_head *head) |
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{ |
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struct inode *inode = container_of(head, struct inode, i_rcu); |
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kmem_cache_free(befs_inode_cachep, BEFS_I(inode)); } |
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static void befs_destroy_inode(struct inode *inode) { call_rcu(&inode->i_rcu, befs_i_callback); } |
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static void init_once(void *foo) |
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{ struct befs_inode_info *bi = (struct befs_inode_info *) foo; |
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inode_init_once(&bi->vfs_inode); |
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} |
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static struct inode *befs_iget(struct super_block *sb, unsigned long ino) |
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{ struct buffer_head *bh = NULL; befs_inode *raw_inode = NULL; |
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befs_sb_info *befs_sb = BEFS_SB(sb); befs_inode_info *befs_ino = NULL; |
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struct inode *inode; long ret = -EIO; |
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|
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befs_debug(sb, "---> befs_read_inode() " "inode = %lu", ino); inode = iget_locked(sb, ino); if (IS_ERR(inode)) return inode; if (!(inode->i_state & I_NEW)) return inode; |
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befs_ino = BEFS_I(inode); /* convert from vfs's inode number to befs's inode number */ befs_ino->i_inode_num = blockno2iaddr(sb, inode->i_ino); befs_debug(sb, " real inode number [%u, %hu, %hu]", befs_ino->i_inode_num.allocation_group, befs_ino->i_inode_num.start, befs_ino->i_inode_num.len); bh = befs_bread(sb, inode->i_ino); if (!bh) { befs_error(sb, "unable to read inode block - " "inode = %lu", inode->i_ino); |
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goto unacquire_none; |
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} raw_inode = (befs_inode *) bh->b_data; befs_dump_inode(sb, raw_inode); if (befs_check_inode(sb, raw_inode, inode->i_ino) != BEFS_OK) { befs_error(sb, "Bad inode: %lu", inode->i_ino); |
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goto unacquire_bh; |
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} inode->i_mode = (umode_t) fs32_to_cpu(sb, raw_inode->mode); /* * set uid and gid. But since current BeOS is single user OS, so * you can change by "uid" or "gid" options. */ inode->i_uid = befs_sb->mount_opts.use_uid ? befs_sb->mount_opts.uid : (uid_t) fs32_to_cpu(sb, raw_inode->uid); inode->i_gid = befs_sb->mount_opts.use_gid ? befs_sb->mount_opts.gid : (gid_t) fs32_to_cpu(sb, raw_inode->gid); |
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set_nlink(inode, 1); |
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/* * BEFS's time is 64 bits, but current VFS is 32 bits... * BEFS don't have access time. Nor inode change time. VFS * doesn't have creation time. * Also, the lower 16 bits of the last_modified_time and * create_time are just a counter to help ensure uniqueness * for indexing purposes. (PFD, page 54) */ inode->i_mtime.tv_sec = fs64_to_cpu(sb, raw_inode->last_modified_time) >> 16; inode->i_mtime.tv_nsec = 0; /* lower 16 bits are not a time */ inode->i_ctime = inode->i_mtime; inode->i_atime = inode->i_mtime; |
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befs_ino->i_inode_num = fsrun_to_cpu(sb, raw_inode->inode_num); befs_ino->i_parent = fsrun_to_cpu(sb, raw_inode->parent); befs_ino->i_attribute = fsrun_to_cpu(sb, raw_inode->attributes); befs_ino->i_flags = fs32_to_cpu(sb, raw_inode->flags); if (S_ISLNK(inode->i_mode) && !(befs_ino->i_flags & BEFS_LONG_SYMLINK)){ inode->i_size = 0; inode->i_blocks = befs_sb->block_size / VFS_BLOCK_SIZE; strncpy(befs_ino->i_data.symlink, raw_inode->data.symlink, |
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BEFS_SYMLINK_LEN - 1); befs_ino->i_data.symlink[BEFS_SYMLINK_LEN - 1] = '\0'; |
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} else { int num_blks; befs_ino->i_data.ds = |
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fsds_to_cpu(sb, &raw_inode->data.datastream); |
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num_blks = befs_count_blocks(sb, &befs_ino->i_data.ds); inode->i_blocks = num_blks * (befs_sb->block_size / VFS_BLOCK_SIZE); inode->i_size = befs_ino->i_data.ds.size; } inode->i_mapping->a_ops = &befs_aops; if (S_ISREG(inode->i_mode)) { |
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inode->i_fop = &generic_ro_fops; |
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} else if (S_ISDIR(inode->i_mode)) { inode->i_op = &befs_dir_inode_operations; inode->i_fop = &befs_dir_operations; } else if (S_ISLNK(inode->i_mode)) { inode->i_op = &befs_symlink_inode_operations; } else { befs_error(sb, "Inode %lu is not a regular file, " "directory or symlink. THAT IS WRONG! BeFS has no " "on disk special files", inode->i_ino); |
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} brelse(bh); befs_debug(sb, "<--- befs_read_inode()"); |
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unlock_new_inode(inode); return inode; |
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|
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unacquire_bh: |
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brelse(bh); |
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unacquire_none: |
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iget_failed(inode); |
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befs_debug(sb, "<--- befs_read_inode() - Bad inode"); |
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return ERR_PTR(ret); |
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} /* Initialize the inode cache. Called at fs setup. |
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* |
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* Taken from NFS implementation by Al Viro. */ static int befs_init_inodecache(void) { befs_inode_cachep = kmem_cache_create("befs_inode_cache", sizeof (struct befs_inode_info), |
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0, (SLAB_RECLAIM_ACCOUNT| SLAB_MEM_SPREAD), |
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init_once); |
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if (befs_inode_cachep == NULL) { printk(KERN_ERR "befs_init_inodecache: " |
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"Couldn't initialize inode slabcache "); |
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return -ENOMEM; } return 0; } /* Called at fs teardown. * * Taken from NFS implementation by Al Viro. */ static void befs_destroy_inodecache(void) { |
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kmem_cache_destroy(befs_inode_cachep); |
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} /* * The inode of symbolic link is different to data stream. * The data stream become link name. Unless the LONG_SYMLINK * flag is set. */ |
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static void * |
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befs_follow_link(struct dentry *dentry, struct nameidata *nd) { befs_inode_info *befs_ino = BEFS_I(dentry->d_inode); char *link; if (befs_ino->i_flags & BEFS_LONG_SYMLINK) { struct super_block *sb = dentry->d_sb; befs_data_stream *data = &befs_ino->i_data.ds; befs_off_t len = data->size; |
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if (len == 0) { befs_error(sb, "Long symlink with illegal length"); |
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link = ERR_PTR(-EIO); |
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} else { |
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befs_debug(sb, "Follow long symlink"); link = kmalloc(len, GFP_NOFS); if (!link) { link = ERR_PTR(-ENOMEM); } else if (befs_read_lsymlink(sb, data, link, len) != len) { kfree(link); befs_error(sb, "Failed to read entire long symlink"); link = ERR_PTR(-EIO); } else { link[len - 1] = '\0'; } |
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} } else { link = befs_ino->i_data.symlink; } nd_set_link(nd, link); |
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return NULL; |
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} |
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static void befs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) |
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{ befs_inode_info *befs_ino = BEFS_I(dentry->d_inode); if (befs_ino->i_flags & BEFS_LONG_SYMLINK) { |
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char *link = nd_get_link(nd); if (!IS_ERR(link)) kfree(link); |
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} } /* * UTF-8 to NLS charset convert routine * * * Changed 8/10/01 by Will Dyson. Now use uni2char() / char2uni() rather than * the nls tables directly */ static int befs_utf2nls(struct super_block *sb, const char *in, int in_len, char **out, int *out_len) { struct nls_table *nls = BEFS_SB(sb)->nls; int i, o; |
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unicode_t uni; |
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int unilen, utflen; char *result; |
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/* The utf8->nls conversion won't make the final nls string bigger * than the utf one, but if the string is pure ascii they'll have the * same width and an extra char is needed to save the additional \0 */ int maxlen = in_len + 1; |
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befs_debug(sb, "---> utf2nls()"); if (!nls) { befs_error(sb, "befs_utf2nls called with no NLS table loaded"); return -EINVAL; } *out = result = kmalloc(maxlen, GFP_NOFS); if (!*out) { befs_error(sb, "befs_utf2nls() cannot allocate memory"); *out_len = 0; return -ENOMEM; } for (i = o = 0; i < in_len; i += utflen, o += unilen) { /* convert from UTF-8 to Unicode */ |
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utflen = utf8_to_utf32(&in[i], in_len - i, &uni); if (utflen < 0) |
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goto conv_err; |
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/* convert from Unicode to nls */ |
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if (uni > MAX_WCHAR_T) goto conv_err; |
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unilen = nls->uni2char(uni, &result[o], in_len - o); |
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if (unilen < 0) |
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goto conv_err; |
1da177e4c Linux-2.6.12-rc2 |
549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 |
} result[o] = '\0'; *out_len = o; befs_debug(sb, "<--- utf2nls()"); return o; conv_err: befs_error(sb, "Name using character set %s contains a character that " "cannot be converted to unicode.", nls->charset); befs_debug(sb, "<--- utf2nls()"); kfree(result); return -EILSEQ; } /** * befs_nls2utf - Convert NLS string to utf8 encodeing * @sb: Superblock * @src: Input string buffer in NLS format * @srclen: Length of input string in bytes |
4de151d8c It's UTF-8 |
570 |
* @dest: The output string in UTF-8 format |
1da177e4c Linux-2.6.12-rc2 |
571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 |
* @destlen: Length of the output buffer * * Converts input string @src, which is in the format of the loaded NLS map, * into a utf8 string. * * The destination string @dest is allocated by this function and the caller is * responsible for freeing it with kfree() * * On return, *@destlen is the length of @dest in bytes. * * On success, the return value is the number of utf8 characters written to * the output buffer @dest. * * On Failure, a negative number coresponding to the error code is returned. */ static int befs_nls2utf(struct super_block *sb, const char *in, int in_len, char **out, int *out_len) { struct nls_table *nls = BEFS_SB(sb)->nls; int i, o; wchar_t uni; int unilen, utflen; char *result; |
94f563c42 [PATCH] Fix BeFS ... |
596 597 598 599 |
/* There're nls characters that will translate to 3-chars-wide UTF-8 * characters, a additional byte is needed to save the final \0 * in special cases */ int maxlen = (3 * in_len) + 1; |
1da177e4c Linux-2.6.12-rc2 |
600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 |
befs_debug(sb, "---> nls2utf() "); if (!nls) { befs_error(sb, "befs_nls2utf called with no NLS table loaded."); return -EINVAL; } *out = result = kmalloc(maxlen, GFP_NOFS); if (!*out) { befs_error(sb, "befs_nls2utf() cannot allocate memory"); *out_len = 0; return -ENOMEM; } for (i = o = 0; i < in_len; i += unilen, o += utflen) { /* convert from nls to unicode */ unilen = nls->char2uni(&in[i], in_len - i, &uni); |
74675a585 NLS: update handl... |
620 |
if (unilen < 0) |
1da177e4c Linux-2.6.12-rc2 |
621 |
goto conv_err; |
1da177e4c Linux-2.6.12-rc2 |
622 623 |
/* convert from unicode to UTF-8 */ |
74675a585 NLS: update handl... |
624 625 |
utflen = utf32_to_utf8(uni, &result[o], 3); if (utflen <= 0) |
1da177e4c Linux-2.6.12-rc2 |
626 |
goto conv_err; |
1da177e4c Linux-2.6.12-rc2 |
627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 |
} result[o] = '\0'; *out_len = o; befs_debug(sb, "<--- nls2utf()"); return i; conv_err: befs_error(sb, "Name using charecter set %s contains a charecter that " "cannot be converted to unicode.", nls->charset); befs_debug(sb, "<--- nls2utf()"); kfree(result); return -EILSEQ; } /** * Use the * */ enum { Opt_uid, Opt_gid, Opt_charset, Opt_debug, Opt_err, }; |
a447c0932 vfs: Use const fo... |
651 |
static const match_table_t befs_tokens = { |
1da177e4c Linux-2.6.12-rc2 |
652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 |
{Opt_uid, "uid=%d"}, {Opt_gid, "gid=%d"}, {Opt_charset, "iocharset=%s"}, {Opt_debug, "debug"}, {Opt_err, NULL} }; static int parse_options(char *options, befs_mount_options * opts) { char *p; substring_t args[MAX_OPT_ARGS]; int option; /* Initialize options */ opts->uid = 0; opts->gid = 0; opts->use_uid = 0; opts->use_gid = 0; opts->iocharset = NULL; opts->debug = 0; if (!options) return 1; while ((p = strsep(&options, ",")) != NULL) { int token; if (!*p) continue; token = match_token(p, befs_tokens, args); switch (token) { case Opt_uid: if (match_int(&args[0], &option)) return 0; if (option < 0) { printk(KERN_ERR "BeFS: Invalid uid %d, " "using default ", option); break; } opts->uid = option; opts->use_uid = 1; break; case Opt_gid: if (match_int(&args[0], &option)) return 0; if (option < 0) { printk(KERN_ERR "BeFS: Invalid gid %d, " "using default ", option); break; } opts->gid = option; opts->use_gid = 1; break; case Opt_charset: kfree(opts->iocharset); opts->iocharset = match_strdup(&args[0]); if (!opts->iocharset) { printk(KERN_ERR "BeFS: allocation failure for " "iocharset string "); return 0; } break; case Opt_debug: opts->debug = 1; break; default: printk(KERN_ERR "BeFS: Unrecognized mount option \"%s\" " "or missing value ", p); return 0; } } return 1; } /* This function has the responsibiltiy of getting the * filesystem ready for unmounting. |
25985edce Fix common misspe... |
733 |
* Basically, we free everything that we allocated in |
1da177e4c Linux-2.6.12-rc2 |
734 735 736 737 738 |
* befs_read_inode */ static void befs_put_super(struct super_block *sb) { |
f99d49adf [PATCH] kfree cle... |
739 740 |
kfree(BEFS_SB(sb)->mount_opts.iocharset); BEFS_SB(sb)->mount_opts.iocharset = NULL; |
6d729e44a fs: Make unload_n... |
741 |
unload_nls(BEFS_SB(sb)->nls); |
f99d49adf [PATCH] kfree cle... |
742 743 |
kfree(sb->s_fs_info); sb->s_fs_info = NULL; |
1da177e4c Linux-2.6.12-rc2 |
744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 |
} /* Allocate private field of the superblock, fill it. * * Finish filling the public superblock fields * Make the root directory * Load a set of NLS translations if needed. */ static int befs_fill_super(struct super_block *sb, void *data, int silent) { struct buffer_head *bh; befs_sb_info *befs_sb; befs_super_block *disk_sb; struct inode *root; |
96eb54194 iget: stop BEFS f... |
759 |
long ret = -EINVAL; |
1da177e4c Linux-2.6.12-rc2 |
760 761 |
const unsigned long sb_block = 0; const off_t x86_sb_off = 512; |
552c3c6c5 mount options: fi... |
762 |
save_mount_options(sb, data); |
1da177e4c Linux-2.6.12-rc2 |
763 764 765 766 767 768 |
sb->s_fs_info = kmalloc(sizeof (*befs_sb), GFP_KERNEL); if (sb->s_fs_info == NULL) { printk(KERN_ERR "BeFS(%s): Unable to allocate memory for private " "portion of superblock. Bailing. ", sb->s_id); |
0418726bb typo fixes: aquir... |
769 |
goto unacquire_none; |
1da177e4c Linux-2.6.12-rc2 |
770 771 772 773 774 775 |
} befs_sb = BEFS_SB(sb); memset(befs_sb, 0, sizeof(befs_sb_info)); if (!parse_options((char *) data, &befs_sb->mount_opts)) { befs_error(sb, "cannot parse mount options"); |
0418726bb typo fixes: aquir... |
776 |
goto unacquire_priv_sbp; |
1da177e4c Linux-2.6.12-rc2 |
777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 |
} befs_debug(sb, "---> befs_fill_super()"); #ifndef CONFIG_BEFS_RW if (!(sb->s_flags & MS_RDONLY)) { befs_warning(sb, "No write support. Marking filesystem read-only"); sb->s_flags |= MS_RDONLY; } #endif /* CONFIG_BEFS_RW */ /* * Set dummy blocksize to read super block. * Will be set to real fs blocksize later. * * Linux 2.4.10 and later refuse to read blocks smaller than * the hardsect size for the device. But we also need to read at * least 1k to get the second 512 bytes of the volume. * -WD 10-26-01 */ sb_min_blocksize(sb, 1024); if (!(bh = sb_bread(sb, sb_block))) { befs_error(sb, "unable to read superblock"); |
0418726bb typo fixes: aquir... |
802 |
goto unacquire_priv_sbp; |
1da177e4c Linux-2.6.12-rc2 |
803 804 805 806 |
} /* account for offset of super block on x86 */ disk_sb = (befs_super_block *) bh->b_data; |
152b95a1e befs: annotate fs... |
807 808 |
if ((disk_sb->magic1 == BEFS_SUPER_MAGIC1_LE) || (disk_sb->magic1 == BEFS_SUPER_MAGIC1_BE)) { |
1da177e4c Linux-2.6.12-rc2 |
809 810 811 812 813 814 815 816 |
befs_debug(sb, "Using PPC superblock location"); } else { befs_debug(sb, "Using x86 superblock location"); disk_sb = (befs_super_block *) ((void *) bh->b_data + x86_sb_off); } if (befs_load_sb(sb, disk_sb) != BEFS_OK) |
0418726bb typo fixes: aquir... |
817 |
goto unacquire_bh; |
1da177e4c Linux-2.6.12-rc2 |
818 819 820 821 822 823 |
befs_dump_super_block(sb, disk_sb); brelse(bh); if (befs_check_sb(sb) != BEFS_OK) |
0418726bb typo fixes: aquir... |
824 |
goto unacquire_priv_sbp; |
1da177e4c Linux-2.6.12-rc2 |
825 826 827 828 829 |
if( befs_sb->num_blocks > ~((sector_t)0) ) { befs_error(sb, "blocks count: %Lu " "is larger than the host can use", befs_sb->num_blocks); |
0418726bb typo fixes: aquir... |
830 |
goto unacquire_priv_sbp; |
1da177e4c Linux-2.6.12-rc2 |
831 832 833 834 835 836 837 838 839 |
} /* * set up enough so that it can read an inode * Fill in kernel superblock fields from private sb */ sb->s_magic = BEFS_SUPER_MAGIC; /* Set real blocksize of fs */ sb_set_blocksize(sb, (ulong) befs_sb->block_size); |
b87221de6 const: mark remai... |
840 |
sb->s_op = &befs_sops; |
96eb54194 iget: stop BEFS f... |
841 842 843 844 845 |
root = befs_iget(sb, iaddr2blockno(sb, &(befs_sb->root_dir))); if (IS_ERR(root)) { ret = PTR_ERR(root); goto unacquire_priv_sbp; } |
1da177e4c Linux-2.6.12-rc2 |
846 847 848 849 |
sb->s_root = d_alloc_root(root); if (!sb->s_root) { iput(root); befs_error(sb, "get root inode failed"); |
0418726bb typo fixes: aquir... |
850 |
goto unacquire_priv_sbp; |
1da177e4c Linux-2.6.12-rc2 |
851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 |
} /* load nls library */ if (befs_sb->mount_opts.iocharset) { befs_debug(sb, "Loading nls: %s", befs_sb->mount_opts.iocharset); befs_sb->nls = load_nls(befs_sb->mount_opts.iocharset); if (!befs_sb->nls) { befs_warning(sb, "Cannot load nls %s" " loading default nls", befs_sb->mount_opts.iocharset); befs_sb->nls = load_nls_default(); } /* load default nls if none is specified in mount options */ } else { befs_debug(sb, "Loading default nls"); befs_sb->nls = load_nls_default(); } return 0; /*****************/ |
0418726bb typo fixes: aquir... |
872 |
unacquire_bh: |
1da177e4c Linux-2.6.12-rc2 |
873 |
brelse(bh); |
0418726bb typo fixes: aquir... |
874 |
unacquire_priv_sbp: |
8dd5ca532 befs: fix leak |
875 |
kfree(befs_sb->mount_opts.iocharset); |
1da177e4c Linux-2.6.12-rc2 |
876 |
kfree(sb->s_fs_info); |
0418726bb typo fixes: aquir... |
877 |
unacquire_none: |
1da177e4c Linux-2.6.12-rc2 |
878 |
sb->s_fs_info = NULL; |
96eb54194 iget: stop BEFS f... |
879 |
return ret; |
1da177e4c Linux-2.6.12-rc2 |
880 881 882 883 884 885 886 887 888 889 890 |
} static int befs_remount(struct super_block *sb, int *flags, char *data) { if (!(*flags & MS_RDONLY)) return -EINVAL; return 0; } static int |
726c33422 [PATCH] VFS: Perm... |
891 |
befs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4c Linux-2.6.12-rc2 |
892 |
{ |
726c33422 [PATCH] VFS: Perm... |
893 |
struct super_block *sb = dentry->d_sb; |
8587246a0 fs/befs: return f... |
894 |
u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
1da177e4c Linux-2.6.12-rc2 |
895 896 897 898 899 900 901 902 903 904 |
befs_debug(sb, "---> befs_statfs()"); buf->f_type = BEFS_SUPER_MAGIC; buf->f_bsize = sb->s_blocksize; buf->f_blocks = BEFS_SB(sb)->num_blocks; buf->f_bfree = BEFS_SB(sb)->num_blocks - BEFS_SB(sb)->used_blocks; buf->f_bavail = buf->f_bfree; buf->f_files = 0; /* UNKNOWN */ buf->f_ffree = 0; /* UNKNOWN */ |
8587246a0 fs/befs: return f... |
905 906 |
buf->f_fsid.val[0] = (u32)id; buf->f_fsid.val[1] = (u32)(id >> 32); |
1da177e4c Linux-2.6.12-rc2 |
907 908 909 910 911 912 |
buf->f_namelen = BEFS_NAME_LEN; befs_debug(sb, "<--- befs_statfs()"); return 0; } |
152a08366 new helper: mount... |
913 914 915 |
static struct dentry * befs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data) |
1da177e4c Linux-2.6.12-rc2 |
916 |
{ |
152a08366 new helper: mount... |
917 |
return mount_bdev(fs_type, flags, dev_name, data, befs_fill_super); |
1da177e4c Linux-2.6.12-rc2 |
918 919 920 921 922 |
} static struct file_system_type befs_fs_type = { .owner = THIS_MODULE, .name = "befs", |
152a08366 new helper: mount... |
923 |
.mount = befs_mount, |
1da177e4c Linux-2.6.12-rc2 |
924 925 926 927 928 929 930 931 932 933 934 935 936 937 |
.kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; static int __init init_befs_fs(void) { int err; printk(KERN_INFO "BeFS version: %s ", BEFS_VERSION); err = befs_init_inodecache(); if (err) |
0418726bb typo fixes: aquir... |
938 |
goto unacquire_none; |
1da177e4c Linux-2.6.12-rc2 |
939 940 941 |
err = register_filesystem(&befs_fs_type); if (err) |
0418726bb typo fixes: aquir... |
942 |
goto unacquire_inodecache; |
1da177e4c Linux-2.6.12-rc2 |
943 944 |
return 0; |
0418726bb typo fixes: aquir... |
945 |
unacquire_inodecache: |
1da177e4c Linux-2.6.12-rc2 |
946 |
befs_destroy_inodecache(); |
0418726bb typo fixes: aquir... |
947 |
unacquire_none: |
1da177e4c Linux-2.6.12-rc2 |
948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 |
return err; } static void __exit exit_befs_fs(void) { befs_destroy_inodecache(); unregister_filesystem(&befs_fs_type); } /* Macros that typecheck the init and exit functions, ensures that they are called at init and cleanup, and eliminates warnings about unused functions. */ module_init(init_befs_fs) module_exit(exit_befs_fs) |