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fs/befs/linuxvfs.c
23.6 KB
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/* * linux/fs/befs/linuxvfs.c * * Copyright (C) 2001 Will Dyson <will_dyson@pobox.com * */ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#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> |
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#include <linux/sched.h> |
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#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 |
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static int befs_readdir(struct file *, struct dir_context *); |
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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); |
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static struct dentry *befs_lookup(struct inode *, struct dentry *, unsigned int); |
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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); |
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static void befs_destroy_inodecache(void); |
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static int befs_symlink_readpage(struct file *, struct page *); |
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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 *, struct befs_mount_options *); |
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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, |
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.iterate_shared = 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 address_space_operations befs_symlink_aops = { .readpage = befs_symlink_readpage, |
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}; /* * 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; |
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int res; |
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ulong disk_off; befs_debug(sb, "---> befs_get_block() for inode %lu, block %ld", |
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(unsigned long)inode->i_ino, (long)block); |
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if (create) { befs_error(sb, "befs_get_block() was asked to write to " |
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"block %ld in inode %lu", (long)block, (unsigned long)inode->i_ino); |
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return -EPERM; } res = befs_fblock2brun(sb, ds, block, &run); if (res != BEFS_OK) { befs_error(sb, |
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"<--- %s for inode %lu, block %ld ERROR", __func__, (unsigned long)inode->i_ino, (long)block); |
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return -EFBIG; } disk_off = (ulong) iaddr2blockno(sb, &run); map_bh(bh_result, inode->i_sb, disk_off); |
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befs_debug(sb, "<--- %s for inode %lu, block %ld, disk address %lu", __func__, (unsigned long)inode->i_ino, (long)block, (unsigned long)disk_off); |
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return 0; } static struct dentry * |
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befs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags) |
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{ |
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struct inode *inode; |
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struct super_block *sb = dir->i_sb; |
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const befs_data_stream *ds = &BEFS_I(dir)->i_data.ds; |
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befs_off_t offset; int ret; int utfnamelen; char *utfname; const char *name = dentry->d_name.name; |
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befs_debug(sb, "---> %s name %pd inode %ld", __func__, dentry, dir->i_ino); |
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/* Convert to UTF-8 */ if (BEFS_SB(sb)->nls) { ret = befs_nls2utf(sb, name, strlen(name), &utfname, &utfnamelen); if (ret < 0) { |
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befs_debug(sb, "<--- %s ERROR", __func__); |
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return ERR_PTR(ret); } ret = befs_btree_find(sb, ds, utfname, &offset); kfree(utfname); } else { |
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ret = befs_btree_find(sb, ds, name, &offset); |
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} if (ret == BEFS_BT_NOT_FOUND) { |
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befs_debug(sb, "<--- %s %pd not found", __func__, dentry); |
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d_add(dentry, NULL); |
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return ERR_PTR(-ENOENT); } else if (ret != BEFS_OK || offset == 0) { |
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befs_error(sb, "<--- %s Error", __func__); |
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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); |
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befs_debug(sb, "<--- %s", __func__); |
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return NULL; } static int |
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befs_readdir(struct file *file, struct dir_context *ctx) |
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{ |
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struct inode *inode = file_inode(file); |
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struct super_block *sb = inode->i_sb; |
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const befs_data_stream *ds = &BEFS_I(inode)->i_data.ds; |
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befs_off_t value; int result; size_t keysize; |
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char keybuf[BEFS_NAME_LEN + 1]; |
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|
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befs_debug(sb, "---> %s name %pD, inode %ld, ctx->pos %lld", __func__, file, inode->i_ino, ctx->pos); |
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|
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while (1) { result = befs_btree_read(sb, ds, ctx->pos, BEFS_NAME_LEN + 1, keybuf, &keysize, &value); |
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|
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if (result == BEFS_ERR) { |
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befs_debug(sb, "<--- %s ERROR", __func__); |
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befs_error(sb, "IO error reading %pD (inode %lu)", file, inode->i_ino); return -EIO; |
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|
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} else if (result == BEFS_BT_END) { befs_debug(sb, "<--- %s END", __func__); return 0; |
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|
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} else if (result == BEFS_BT_EMPTY) { befs_debug(sb, "<--- %s Empty directory", __func__); return 0; |
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} |
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/* Convert to NLS */ if (BEFS_SB(sb)->nls) { char *nlsname; int nlsnamelen; result = befs_utf2nls(sb, keybuf, keysize, &nlsname, &nlsnamelen); if (result < 0) { befs_debug(sb, "<--- %s ERROR", __func__); return result; } if (!dir_emit(ctx, nlsname, nlsnamelen, (ino_t) value, DT_UNKNOWN)) { kfree(nlsname); return 0; } |
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kfree(nlsname); |
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} else { if (!dir_emit(ctx, keybuf, keysize, (ino_t) value, DT_UNKNOWN)) return 0; |
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} |
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ctx->pos++; |
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} |
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} static struct inode * befs_alloc_inode(struct super_block *sb) { |
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struct befs_inode_info *bi; bi = kmem_cache_alloc(befs_inode_cachep, 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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{ |
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struct buffer_head *bh; |
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befs_inode *raw_inode; |
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struct befs_sb_info *befs_sb = BEFS_SB(sb); |
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struct befs_inode_info *befs_ino; |
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struct inode *inode; |
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|
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befs_debug(sb, "---> %s inode = %lu", __func__, ino); |
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inode = iget_locked(sb, ino); |
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if (!inode) return ERR_PTR(-ENOMEM); |
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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); |
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bh = sb_bread(sb, inode->i_ino); |
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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 ? |
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befs_sb->mount_opts.uid : make_kuid(&init_user_ns, fs32_to_cpu(sb, raw_inode->uid)); |
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inode->i_gid = befs_sb->mount_opts.use_gid ? |
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befs_sb->mount_opts.gid : make_kgid(&init_user_ns, fs32_to_cpu(sb, raw_inode->gid)); |
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|
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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; |
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strlcpy(befs_ino->i_data.symlink, raw_inode->data.symlink, BEFS_SYMLINK_LEN); |
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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)) { |
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if (befs_ino->i_flags & BEFS_LONG_SYMLINK) { |
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inode->i_op = &page_symlink_inode_operations; |
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inode_nohighmem(inode); |
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inode->i_mapping->a_ops = &befs_symlink_aops; |
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} else { inode->i_link = befs_ino->i_data.symlink; inode->i_op = &simple_symlink_inode_operations; } |
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} 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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goto unacquire_bh; |
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} brelse(bh); |
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befs_debug(sb, "<--- %s", __func__); |
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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, "<--- %s - Bad inode", __func__); |
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return ERR_PTR(-EIO); |
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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. */ |
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static int __init |
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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| |
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SLAB_MEM_SPREAD|SLAB_ACCOUNT), |
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init_once); |
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422 |
if (befs_inode_cachep == NULL) |
1da177e4c Linux-2.6.12-rc2 |
423 |
return -ENOMEM; |
c08f1cb62 fs: befs: remove ... |
424 |
|
1da177e4c Linux-2.6.12-rc2 |
425 426 427 428 429 430 431 432 433 434 |
return 0; } /* Called at fs teardown. * * Taken from NFS implementation by Al Viro. */ static void befs_destroy_inodecache(void) { |
8c0a85377 fs: push rcu_barr... |
435 436 437 438 439 |
/* * Make sure all delayed rcu free inodes are flushed before we * destroy cache. */ rcu_barrier(); |
1a1d92c10 [PATCH] Really ig... |
440 |
kmem_cache_destroy(befs_inode_cachep); |
1da177e4c Linux-2.6.12-rc2 |
441 442 443 444 445 446 447 |
} /* * The inode of symbolic link is different to data stream. * The data stream become link name. Unless the LONG_SYMLINK * flag is set. */ |
11803f97f switch befs long ... |
448 |
static int befs_symlink_readpage(struct file *unused, struct page *page) |
1da177e4c Linux-2.6.12-rc2 |
449 |
{ |
11803f97f switch befs long ... |
450 451 452 |
struct inode *inode = page->mapping->host; struct super_block *sb = inode->i_sb; struct befs_inode_info *befs_ino = BEFS_I(inode); |
48bc06e74 befs: split symli... |
453 454 |
befs_data_stream *data = &befs_ino->i_data.ds; befs_off_t len = data->size; |
21fc61c73 don't put symlink... |
455 |
char *link = page_address(page); |
1da177e4c Linux-2.6.12-rc2 |
456 |
|
11803f97f switch befs long ... |
457 |
if (len == 0 || len > PAGE_SIZE) { |
48bc06e74 befs: split symli... |
458 |
befs_error(sb, "Long symlink with illegal length"); |
11803f97f switch befs long ... |
459 |
goto fail; |
1da177e4c Linux-2.6.12-rc2 |
460 |
} |
680baacbc new ->follow_link... |
461 |
befs_debug(sb, "Follow long symlink"); |
680baacbc new ->follow_link... |
462 |
if (befs_read_lsymlink(sb, data, link, len) != len) { |
680baacbc new ->follow_link... |
463 |
befs_error(sb, "Failed to read entire long symlink"); |
11803f97f switch befs long ... |
464 |
goto fail; |
680baacbc new ->follow_link... |
465 466 |
} link[len - 1] = '\0'; |
11803f97f switch befs long ... |
467 |
SetPageUptodate(page); |
11803f97f switch befs long ... |
468 469 470 471 |
unlock_page(page); return 0; fail: SetPageError(page); |
11803f97f switch befs long ... |
472 473 |
unlock_page(page); return -EIO; |
1da177e4c Linux-2.6.12-rc2 |
474 |
} |
1da177e4c Linux-2.6.12-rc2 |
475 476 477 478 479 480 481 482 483 484 485 486 487 488 |
/* * 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; |
74675a585 NLS: update handl... |
489 |
unicode_t uni; |
1da177e4c Linux-2.6.12-rc2 |
490 491 |
int unilen, utflen; char *result; |
94f563c42 [PATCH] Fix BeFS ... |
492 493 494 495 496 |
/* 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; |
1da177e4c Linux-2.6.12-rc2 |
497 |
|
dac52fc18 BEFS: logging cle... |
498 |
befs_debug(sb, "---> %s", __func__); |
1da177e4c Linux-2.6.12-rc2 |
499 500 |
if (!nls) { |
dac52fc18 BEFS: logging cle... |
501 |
befs_error(sb, "%s called with no NLS table loaded", __func__); |
1da177e4c Linux-2.6.12-rc2 |
502 503 504 505 506 |
return -EINVAL; } *out = result = kmalloc(maxlen, GFP_NOFS); if (!*out) { |
1da177e4c Linux-2.6.12-rc2 |
507 508 509 510 511 512 |
return -ENOMEM; } for (i = o = 0; i < in_len; i += utflen, o += unilen) { /* convert from UTF-8 to Unicode */ |
74675a585 NLS: update handl... |
513 514 |
utflen = utf8_to_utf32(&in[i], in_len - i, &uni); if (utflen < 0) |
1da177e4c Linux-2.6.12-rc2 |
515 |
goto conv_err; |
1da177e4c Linux-2.6.12-rc2 |
516 517 |
/* convert from Unicode to nls */ |
74675a585 NLS: update handl... |
518 519 |
if (uni > MAX_WCHAR_T) goto conv_err; |
1da177e4c Linux-2.6.12-rc2 |
520 |
unilen = nls->uni2char(uni, &result[o], in_len - o); |
74675a585 NLS: update handl... |
521 |
if (unilen < 0) |
1da177e4c Linux-2.6.12-rc2 |
522 |
goto conv_err; |
1da177e4c Linux-2.6.12-rc2 |
523 524 525 |
} result[o] = '\0'; *out_len = o; |
dac52fc18 BEFS: logging cle... |
526 |
befs_debug(sb, "<--- %s", __func__); |
1da177e4c Linux-2.6.12-rc2 |
527 528 529 530 531 532 |
return o; conv_err: befs_error(sb, "Name using character set %s contains a character that " "cannot be converted to unicode.", nls->charset); |
dac52fc18 BEFS: logging cle... |
533 |
befs_debug(sb, "<--- %s", __func__); |
1da177e4c Linux-2.6.12-rc2 |
534 535 536 537 538 539 540 |
kfree(result); return -EILSEQ; } /** * befs_nls2utf - Convert NLS string to utf8 encodeing * @sb: Superblock |
817e1d902 fs/befs: kernel-d... |
541 542 543 544 |
* @in: Input string buffer in NLS format * @in_len: Length of input string in bytes * @out: The output string in UTF-8 format * @out_len: Length of the output buffer |
1da177e4c Linux-2.6.12-rc2 |
545 |
* |
817e1d902 fs/befs: kernel-d... |
546 |
* Converts input string @in, which is in the format of the loaded NLS map, |
1da177e4c Linux-2.6.12-rc2 |
547 548 |
* into a utf8 string. * |
817e1d902 fs/befs: kernel-d... |
549 |
* The destination string @out is allocated by this function and the caller is |
1da177e4c Linux-2.6.12-rc2 |
550 551 |
* responsible for freeing it with kfree() * |
817e1d902 fs/befs: kernel-d... |
552 |
* On return, *@out_len is the length of @out in bytes. |
1da177e4c Linux-2.6.12-rc2 |
553 554 |
* * On success, the return value is the number of utf8 characters written to |
817e1d902 fs/befs: kernel-d... |
555 |
* the output buffer @out. |
1da177e4c Linux-2.6.12-rc2 |
556 557 558 559 560 561 562 563 564 565 566 567 568 |
* * 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 ... |
569 570 571 572 |
/* 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 |
573 |
|
dac52fc18 BEFS: logging cle... |
574 575 |
befs_debug(sb, "---> %s ", __func__); |
1da177e4c Linux-2.6.12-rc2 |
576 577 |
if (!nls) { |
dac52fc18 BEFS: logging cle... |
578 579 |
befs_error(sb, "%s called with no NLS table loaded.", __func__); |
1da177e4c Linux-2.6.12-rc2 |
580 581 582 583 584 |
return -EINVAL; } *out = result = kmalloc(maxlen, GFP_NOFS); if (!*out) { |
1da177e4c Linux-2.6.12-rc2 |
585 586 587 588 589 590 591 592 |
*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... |
593 |
if (unilen < 0) |
1da177e4c Linux-2.6.12-rc2 |
594 |
goto conv_err; |
1da177e4c Linux-2.6.12-rc2 |
595 596 |
/* convert from unicode to UTF-8 */ |
74675a585 NLS: update handl... |
597 598 |
utflen = utf32_to_utf8(uni, &result[o], 3); if (utflen <= 0) |
1da177e4c Linux-2.6.12-rc2 |
599 |
goto conv_err; |
1da177e4c Linux-2.6.12-rc2 |
600 601 602 603 |
} result[o] = '\0'; *out_len = o; |
dac52fc18 BEFS: logging cle... |
604 |
befs_debug(sb, "<--- %s", __func__); |
1da177e4c Linux-2.6.12-rc2 |
605 606 607 608 609 610 |
return i; conv_err: befs_error(sb, "Name using charecter set %s contains a charecter that " "cannot be converted to unicode.", nls->charset); |
dac52fc18 BEFS: logging cle... |
611 |
befs_debug(sb, "<--- %s", __func__); |
1da177e4c Linux-2.6.12-rc2 |
612 613 614 |
kfree(result); return -EILSEQ; } |
1da177e4c Linux-2.6.12-rc2 |
615 616 617 |
enum { Opt_uid, Opt_gid, Opt_charset, Opt_debug, Opt_err, }; |
a447c0932 vfs: Use const fo... |
618 |
static const match_table_t befs_tokens = { |
1da177e4c Linux-2.6.12-rc2 |
619 620 621 622 623 624 625 626 |
{Opt_uid, "uid=%d"}, {Opt_gid, "gid=%d"}, {Opt_charset, "iocharset=%s"}, {Opt_debug, "debug"}, {Opt_err, NULL} }; static int |
09ad0eae5 befs: replace typ... |
627 |
parse_options(char *options, struct befs_mount_options *opts) |
1da177e4c Linux-2.6.12-rc2 |
628 629 630 631 |
{ char *p; substring_t args[MAX_OPT_ARGS]; int option; |
31aba059b userns: Convert b... |
632 633 |
kuid_t uid; kgid_t gid; |
1da177e4c Linux-2.6.12-rc2 |
634 635 |
/* Initialize options */ |
31aba059b userns: Convert b... |
636 637 |
opts->uid = GLOBAL_ROOT_UID; opts->gid = GLOBAL_ROOT_GID; |
1da177e4c Linux-2.6.12-rc2 |
638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 |
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; |
31aba059b userns: Convert b... |
656 657 658 659 |
uid = INVALID_UID; if (option >= 0) uid = make_kuid(current_user_ns(), option); if (!uid_valid(uid)) { |
dac52fc18 BEFS: logging cle... |
660 661 662 |
pr_err("Invalid uid %d, " "using default ", option); |
1da177e4c Linux-2.6.12-rc2 |
663 664 |
break; } |
31aba059b userns: Convert b... |
665 |
opts->uid = uid; |
1da177e4c Linux-2.6.12-rc2 |
666 667 668 669 670 |
opts->use_uid = 1; break; case Opt_gid: if (match_int(&args[0], &option)) return 0; |
31aba059b userns: Convert b... |
671 672 673 674 |
gid = INVALID_GID; if (option >= 0) gid = make_kgid(current_user_ns(), option); if (!gid_valid(gid)) { |
dac52fc18 BEFS: logging cle... |
675 676 677 |
pr_err("Invalid gid %d, " "using default ", option); |
1da177e4c Linux-2.6.12-rc2 |
678 679 |
break; } |
31aba059b userns: Convert b... |
680 |
opts->gid = gid; |
1da177e4c Linux-2.6.12-rc2 |
681 682 683 684 685 686 |
opts->use_gid = 1; break; case Opt_charset: kfree(opts->iocharset); opts->iocharset = match_strdup(&args[0]); if (!opts->iocharset) { |
dac52fc18 BEFS: logging cle... |
687 688 689 |
pr_err("allocation failure for " "iocharset string "); |
1da177e4c Linux-2.6.12-rc2 |
690 691 692 693 694 695 696 |
return 0; } break; case Opt_debug: opts->debug = 1; break; default: |
dac52fc18 BEFS: logging cle... |
697 698 699 |
pr_err("Unrecognized mount option \"%s\" " "or missing value ", p); |
1da177e4c Linux-2.6.12-rc2 |
700 701 702 703 704 705 706 707 |
return 0; } } return 1; } /* This function has the responsibiltiy of getting the * filesystem ready for unmounting. |
25985edce Fix common misspe... |
708 |
* Basically, we free everything that we allocated in |
1da177e4c Linux-2.6.12-rc2 |
709 710 711 712 713 |
* befs_read_inode */ static void befs_put_super(struct super_block *sb) { |
f99d49adf [PATCH] kfree cle... |
714 715 |
kfree(BEFS_SB(sb)->mount_opts.iocharset); BEFS_SB(sb)->mount_opts.iocharset = NULL; |
6d729e44a fs: Make unload_n... |
716 |
unload_nls(BEFS_SB(sb)->nls); |
f99d49adf [PATCH] kfree cle... |
717 718 |
kfree(sb->s_fs_info); sb->s_fs_info = NULL; |
1da177e4c Linux-2.6.12-rc2 |
719 720 721 722 723 724 725 726 727 728 729 730 |
} /* 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; |
038428fcf befs: replace typ... |
731 |
struct befs_sb_info *befs_sb; |
1da177e4c Linux-2.6.12-rc2 |
732 733 |
befs_super_block *disk_sb; struct inode *root; |
96eb54194 iget: stop BEFS f... |
734 |
long ret = -EINVAL; |
1da177e4c Linux-2.6.12-rc2 |
735 736 |
const unsigned long sb_block = 0; const off_t x86_sb_off = 512; |
173b066f5 befs: check retur... |
737 |
int blocksize; |
1da177e4c Linux-2.6.12-rc2 |
738 |
|
552c3c6c5 mount options: fi... |
739 |
save_mount_options(sb, data); |
2d4319ef5 befs: replace kma... |
740 |
sb->s_fs_info = kzalloc(sizeof(*befs_sb), GFP_KERNEL); |
c625426fb fs/befs/linuxvfs.... |
741 |
if (sb->s_fs_info == NULL) |
0418726bb typo fixes: aquir... |
742 |
goto unacquire_none; |
c625426fb fs/befs/linuxvfs.... |
743 |
|
1da177e4c Linux-2.6.12-rc2 |
744 |
befs_sb = BEFS_SB(sb); |
1da177e4c Linux-2.6.12-rc2 |
745 746 |
if (!parse_options((char *) data, &befs_sb->mount_opts)) { |
dceee2e23 fs/befs/linuxvfs.... |
747 748 |
if (!silent) befs_error(sb, "cannot parse mount options"); |
0418726bb typo fixes: aquir... |
749 |
goto unacquire_priv_sbp; |
1da177e4c Linux-2.6.12-rc2 |
750 |
} |
dac52fc18 BEFS: logging cle... |
751 |
befs_debug(sb, "---> %s", __func__); |
1da177e4c Linux-2.6.12-rc2 |
752 |
|
1da177e4c Linux-2.6.12-rc2 |
753 754 755 756 757 |
if (!(sb->s_flags & MS_RDONLY)) { befs_warning(sb, "No write support. Marking filesystem read-only"); sb->s_flags |= MS_RDONLY; } |
1da177e4c Linux-2.6.12-rc2 |
758 759 760 761 762 763 |
/* * 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 |
a441b0d09 block: remove rem... |
764 |
* the logical block size for the device. But we also need to read at |
1da177e4c Linux-2.6.12-rc2 |
765 766 767 |
* least 1k to get the second 512 bytes of the volume. * -WD 10-26-01 */ |
173b066f5 befs: check retur... |
768 769 |
blocksize = sb_min_blocksize(sb, 1024); if (!blocksize) { |
a64998504 fs: befs: check s... |
770 771 |
if (!silent) befs_error(sb, "unable to set blocksize"); |
173b066f5 befs: check retur... |
772 773 |
goto unacquire_priv_sbp; } |
1da177e4c Linux-2.6.12-rc2 |
774 775 |
if (!(bh = sb_bread(sb, sb_block))) { |
dceee2e23 fs/befs/linuxvfs.... |
776 777 |
if (!silent) befs_error(sb, "unable to read superblock"); |
0418726bb typo fixes: aquir... |
778 |
goto unacquire_priv_sbp; |
1da177e4c Linux-2.6.12-rc2 |
779 780 781 782 |
} /* account for offset of super block on x86 */ disk_sb = (befs_super_block *) bh->b_data; |
152b95a1e befs: annotate fs... |
783 784 |
if ((disk_sb->magic1 == BEFS_SUPER_MAGIC1_LE) || (disk_sb->magic1 == BEFS_SUPER_MAGIC1_BE)) { |
1da177e4c Linux-2.6.12-rc2 |
785 786 787 788 789 790 |
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); } |
8e19189ef fs/befs/linuxvfs.... |
791 792 |
if ((befs_load_sb(sb, disk_sb) != BEFS_OK) || (befs_check_sb(sb) != BEFS_OK)) |
0418726bb typo fixes: aquir... |
793 |
goto unacquire_bh; |
1da177e4c Linux-2.6.12-rc2 |
794 795 796 797 |
befs_dump_super_block(sb, disk_sb); brelse(bh); |
1da177e4c Linux-2.6.12-rc2 |
798 |
if( befs_sb->num_blocks > ~((sector_t)0) ) { |
dceee2e23 fs/befs/linuxvfs.... |
799 800 801 |
if (!silent) befs_error(sb, "blocks count: %llu is larger than the host can use", befs_sb->num_blocks); |
0418726bb typo fixes: aquir... |
802 |
goto unacquire_priv_sbp; |
1da177e4c Linux-2.6.12-rc2 |
803 804 805 806 807 808 809 810 811 |
} /* * 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... |
812 |
sb->s_op = &befs_sops; |
96eb54194 iget: stop BEFS f... |
813 814 815 816 817 |
root = befs_iget(sb, iaddr2blockno(sb, &(befs_sb->root_dir))); if (IS_ERR(root)) { ret = PTR_ERR(root); goto unacquire_priv_sbp; } |
48fde701a switch open-coded... |
818 |
sb->s_root = d_make_root(root); |
1da177e4c Linux-2.6.12-rc2 |
819 |
if (!sb->s_root) { |
dceee2e23 fs/befs/linuxvfs.... |
820 821 |
if (!silent) befs_error(sb, "get root inode failed"); |
0418726bb typo fixes: aquir... |
822 |
goto unacquire_priv_sbp; |
1da177e4c Linux-2.6.12-rc2 |
823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 |
} /* 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... |
844 |
unacquire_bh: |
1da177e4c Linux-2.6.12-rc2 |
845 |
brelse(bh); |
0418726bb typo fixes: aquir... |
846 |
unacquire_priv_sbp: |
8dd5ca532 befs: fix leak |
847 |
kfree(befs_sb->mount_opts.iocharset); |
1da177e4c Linux-2.6.12-rc2 |
848 |
kfree(sb->s_fs_info); |
30982583e fs/befs/linuxvfs.... |
849 |
sb->s_fs_info = NULL; |
1da177e4c Linux-2.6.12-rc2 |
850 |
|
0418726bb typo fixes: aquir... |
851 |
unacquire_none: |
96eb54194 iget: stop BEFS f... |
852 |
return ret; |
1da177e4c Linux-2.6.12-rc2 |
853 854 855 856 857 |
} static int befs_remount(struct super_block *sb, int *flags, char *data) { |
02b9984d6 fs: push sync_fil... |
858 |
sync_filesystem(sb); |
1da177e4c Linux-2.6.12-rc2 |
859 860 861 862 863 864 |
if (!(*flags & MS_RDONLY)) return -EINVAL; return 0; } static int |
726c33422 [PATCH] VFS: Perm... |
865 |
befs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4c Linux-2.6.12-rc2 |
866 |
{ |
726c33422 [PATCH] VFS: Perm... |
867 |
struct super_block *sb = dentry->d_sb; |
8587246a0 fs/befs: return f... |
868 |
u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
1da177e4c Linux-2.6.12-rc2 |
869 |
|
dac52fc18 BEFS: logging cle... |
870 |
befs_debug(sb, "---> %s", __func__); |
1da177e4c Linux-2.6.12-rc2 |
871 872 873 874 875 876 877 878 |
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... |
879 880 |
buf->f_fsid.val[0] = (u32)id; buf->f_fsid.val[1] = (u32)(id >> 32); |
1da177e4c Linux-2.6.12-rc2 |
881 |
buf->f_namelen = BEFS_NAME_LEN; |
dac52fc18 BEFS: logging cle... |
882 |
befs_debug(sb, "<--- %s", __func__); |
1da177e4c Linux-2.6.12-rc2 |
883 884 885 |
return 0; } |
152a08366 new helper: mount... |
886 887 888 |
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 |
889 |
{ |
152a08366 new helper: mount... |
890 |
return mount_bdev(fs_type, flags, dev_name, data, befs_fill_super); |
1da177e4c Linux-2.6.12-rc2 |
891 892 893 894 895 |
} static struct file_system_type befs_fs_type = { .owner = THIS_MODULE, .name = "befs", |
152a08366 new helper: mount... |
896 |
.mount = befs_mount, |
1da177e4c Linux-2.6.12-rc2 |
897 898 899 |
.kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; |
7f78e0351 fs: Limit sys_mou... |
900 |
MODULE_ALIAS_FS("befs"); |
1da177e4c Linux-2.6.12-rc2 |
901 902 903 904 905 |
static int __init init_befs_fs(void) { int err; |
dac52fc18 BEFS: logging cle... |
906 907 |
pr_info("version: %s ", BEFS_VERSION); |
1da177e4c Linux-2.6.12-rc2 |
908 909 910 |
err = befs_init_inodecache(); if (err) |
0418726bb typo fixes: aquir... |
911 |
goto unacquire_none; |
1da177e4c Linux-2.6.12-rc2 |
912 913 914 |
err = register_filesystem(&befs_fs_type); if (err) |
0418726bb typo fixes: aquir... |
915 |
goto unacquire_inodecache; |
1da177e4c Linux-2.6.12-rc2 |
916 917 |
return 0; |
0418726bb typo fixes: aquir... |
918 |
unacquire_inodecache: |
1da177e4c Linux-2.6.12-rc2 |
919 |
befs_destroy_inodecache(); |
0418726bb typo fixes: aquir... |
920 |
unacquire_none: |
1da177e4c Linux-2.6.12-rc2 |
921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 |
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) |