diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/hpfs/dir.c')
-rw-r--r-- | ANDROID_3.4.5/fs/hpfs/dir.c | 326 |
1 files changed, 0 insertions, 326 deletions
diff --git a/ANDROID_3.4.5/fs/hpfs/dir.c b/ANDROID_3.4.5/fs/hpfs/dir.c deleted file mode 100644 index 2fa0089a..00000000 --- a/ANDROID_3.4.5/fs/hpfs/dir.c +++ /dev/null @@ -1,326 +0,0 @@ -/* - * linux/fs/hpfs/dir.c - * - * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999 - * - * directory VFS functions - */ - -#include <linux/slab.h> -#include "hpfs_fn.h" - -static int hpfs_dir_release(struct inode *inode, struct file *filp) -{ - hpfs_lock(inode->i_sb); - hpfs_del_pos(inode, &filp->f_pos); - /*hpfs_write_if_changed(inode);*/ - hpfs_unlock(inode->i_sb); - return 0; -} - -/* This is slow, but it's not used often */ - -static loff_t hpfs_dir_lseek(struct file *filp, loff_t off, int whence) -{ - loff_t new_off = off + (whence == 1 ? filp->f_pos : 0); - loff_t pos; - struct quad_buffer_head qbh; - struct inode *i = filp->f_path.dentry->d_inode; - struct hpfs_inode_info *hpfs_inode = hpfs_i(i); - struct super_block *s = i->i_sb; - - /* Somebody else will have to figure out what to do here */ - if (whence == SEEK_DATA || whence == SEEK_HOLE) - return -EINVAL; - - hpfs_lock(s); - - /*printk("dir lseek\n");*/ - if (new_off == 0 || new_off == 1 || new_off == 11 || new_off == 12 || new_off == 13) goto ok; - mutex_lock(&i->i_mutex); - pos = ((loff_t) hpfs_de_as_down_as_possible(s, hpfs_inode->i_dno) << 4) + 1; - while (pos != new_off) { - if (map_pos_dirent(i, &pos, &qbh)) hpfs_brelse4(&qbh); - else goto fail; - if (pos == 12) goto fail; - } - mutex_unlock(&i->i_mutex); -ok: - hpfs_unlock(s); - return filp->f_pos = new_off; -fail: - mutex_unlock(&i->i_mutex); - /*printk("illegal lseek: %016llx\n", new_off);*/ - hpfs_unlock(s); - return -ESPIPE; -} - -static int hpfs_readdir(struct file *filp, void *dirent, filldir_t filldir) -{ - struct inode *inode = filp->f_path.dentry->d_inode; - struct hpfs_inode_info *hpfs_inode = hpfs_i(inode); - struct quad_buffer_head qbh; - struct hpfs_dirent *de; - int lc; - long old_pos; - unsigned char *tempname; - int c1, c2 = 0; - int ret = 0; - - hpfs_lock(inode->i_sb); - - if (hpfs_sb(inode->i_sb)->sb_chk) { - if (hpfs_chk_sectors(inode->i_sb, inode->i_ino, 1, "dir_fnode")) { - ret = -EFSERROR; - goto out; - } - if (hpfs_chk_sectors(inode->i_sb, hpfs_inode->i_dno, 4, "dir_dnode")) { - ret = -EFSERROR; - goto out; - } - } - if (hpfs_sb(inode->i_sb)->sb_chk >= 2) { - struct buffer_head *bh; - struct fnode *fno; - int e = 0; - if (!(fno = hpfs_map_fnode(inode->i_sb, inode->i_ino, &bh))) { - ret = -EIOERROR; - goto out; - } - if (!fno->dirflag) { - e = 1; - hpfs_error(inode->i_sb, "not a directory, fnode %08lx", - (unsigned long)inode->i_ino); - } - if (hpfs_inode->i_dno != le32_to_cpu(fno->u.external[0].disk_secno)) { - e = 1; - hpfs_error(inode->i_sb, "corrupted inode: i_dno == %08x, fnode -> dnode == %08x", hpfs_inode->i_dno, le32_to_cpu(fno->u.external[0].disk_secno)); - } - brelse(bh); - if (e) { - ret = -EFSERROR; - goto out; - } - } - lc = hpfs_sb(inode->i_sb)->sb_lowercase; - if (filp->f_pos == 12) { /* diff -r requires this (note, that diff -r */ - filp->f_pos = 13; /* also fails on msdos filesystem in 2.0) */ - goto out; - } - if (filp->f_pos == 13) { - ret = -ENOENT; - goto out; - } - - while (1) { - again: - /* This won't work when cycle is longer than number of dirents - accepted by filldir, but what can I do? - maybe killall -9 ls helps */ - if (hpfs_sb(inode->i_sb)->sb_chk) - if (hpfs_stop_cycles(inode->i_sb, filp->f_pos, &c1, &c2, "hpfs_readdir")) { - ret = -EFSERROR; - goto out; - } - if (filp->f_pos == 12) - goto out; - if (filp->f_pos == 3 || filp->f_pos == 4 || filp->f_pos == 5) { - printk("HPFS: warning: pos==%d\n",(int)filp->f_pos); - goto out; - } - if (filp->f_pos == 0) { - if (filldir(dirent, ".", 1, filp->f_pos, inode->i_ino, DT_DIR) < 0) - goto out; - filp->f_pos = 11; - } - if (filp->f_pos == 11) { - if (filldir(dirent, "..", 2, filp->f_pos, hpfs_inode->i_parent_dir, DT_DIR) < 0) - goto out; - filp->f_pos = 1; - } - if (filp->f_pos == 1) { - filp->f_pos = ((loff_t) hpfs_de_as_down_as_possible(inode->i_sb, hpfs_inode->i_dno) << 4) + 1; - hpfs_add_pos(inode, &filp->f_pos); - filp->f_version = inode->i_version; - } - old_pos = filp->f_pos; - if (!(de = map_pos_dirent(inode, &filp->f_pos, &qbh))) { - ret = -EIOERROR; - goto out; - } - if (de->first || de->last) { - if (hpfs_sb(inode->i_sb)->sb_chk) { - if (de->first && !de->last && (de->namelen != 2 - || de ->name[0] != 1 || de->name[1] != 1)) - hpfs_error(inode->i_sb, "hpfs_readdir: bad ^A^A entry; pos = %08lx", old_pos); - if (de->last && (de->namelen != 1 || de ->name[0] != 255)) - hpfs_error(inode->i_sb, "hpfs_readdir: bad \\377 entry; pos = %08lx", old_pos); - } - hpfs_brelse4(&qbh); - goto again; - } - tempname = hpfs_translate_name(inode->i_sb, de->name, de->namelen, lc, de->not_8x3); - if (filldir(dirent, tempname, de->namelen, old_pos, le32_to_cpu(de->fnode), DT_UNKNOWN) < 0) { - filp->f_pos = old_pos; - if (tempname != de->name) kfree(tempname); - hpfs_brelse4(&qbh); - goto out; - } - if (tempname != de->name) kfree(tempname); - hpfs_brelse4(&qbh); - } -out: - hpfs_unlock(inode->i_sb); - return ret; -} - -/* - * lookup. Search the specified directory for the specified name, set - * *result to the corresponding inode. - * - * lookup uses the inode number to tell read_inode whether it is reading - * the inode of a directory or a file -- file ino's are odd, directory - * ino's are even. read_inode avoids i/o for file inodes; everything - * needed is up here in the directory. (And file fnodes are out in - * the boondocks.) - * - * - M.P.: this is over, sometimes we've got to read file's fnode for eas - * inode numbers are just fnode sector numbers; iget lock is used - * to tell read_inode to read fnode or not. - */ - -struct dentry *hpfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd) -{ - const unsigned char *name = dentry->d_name.name; - unsigned len = dentry->d_name.len; - struct quad_buffer_head qbh; - struct hpfs_dirent *de; - ino_t ino; - int err; - struct inode *result = NULL; - struct hpfs_inode_info *hpfs_result; - - hpfs_lock(dir->i_sb); - if ((err = hpfs_chk_name(name, &len))) { - if (err == -ENAMETOOLONG) { - hpfs_unlock(dir->i_sb); - return ERR_PTR(-ENAMETOOLONG); - } - goto end_add; - } - - /* - * '.' and '..' will never be passed here. - */ - - de = map_dirent(dir, hpfs_i(dir)->i_dno, name, len, NULL, &qbh); - - /* - * This is not really a bailout, just means file not found. - */ - - if (!de) goto end; - - /* - * Get inode number, what we're after. - */ - - ino = le32_to_cpu(de->fnode); - - /* - * Go find or make an inode. - */ - - result = iget_locked(dir->i_sb, ino); - if (!result) { - hpfs_error(dir->i_sb, "hpfs_lookup: can't get inode"); - goto bail1; - } - if (result->i_state & I_NEW) { - hpfs_init_inode(result); - if (de->directory) - hpfs_read_inode(result); - else if (le32_to_cpu(de->ea_size) && hpfs_sb(dir->i_sb)->sb_eas) - hpfs_read_inode(result); - else { - result->i_mode |= S_IFREG; - result->i_mode &= ~0111; - result->i_op = &hpfs_file_iops; - result->i_fop = &hpfs_file_ops; - set_nlink(result, 1); - } - unlock_new_inode(result); - } - hpfs_result = hpfs_i(result); - if (!de->directory) hpfs_result->i_parent_dir = dir->i_ino; - - if (de->has_acl || de->has_xtd_perm) if (!(dir->i_sb->s_flags & MS_RDONLY)) { - hpfs_error(result->i_sb, "ACLs or XPERM found. This is probably HPFS386. This driver doesn't support it now. Send me some info on these structures"); - goto bail1; - } - - /* - * Fill in the info from the directory if this is a newly created - * inode. - */ - - if (!result->i_ctime.tv_sec) { - if (!(result->i_ctime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(de->creation_date)))) - result->i_ctime.tv_sec = 1; - result->i_ctime.tv_nsec = 0; - result->i_mtime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(de->write_date)); - result->i_mtime.tv_nsec = 0; - result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(de->read_date)); - result->i_atime.tv_nsec = 0; - hpfs_result->i_ea_size = le32_to_cpu(de->ea_size); - if (!hpfs_result->i_ea_mode && de->read_only) - result->i_mode &= ~0222; - if (!de->directory) { - if (result->i_size == -1) { - result->i_size = le32_to_cpu(de->file_size); - result->i_data.a_ops = &hpfs_aops; - hpfs_i(result)->mmu_private = result->i_size; - /* - * i_blocks should count the fnode and any anodes. - * We count 1 for the fnode and don't bother about - * anodes -- the disk heads are on the directory band - * and we want them to stay there. - */ - result->i_blocks = 1 + ((result->i_size + 511) >> 9); - } - } - } - - hpfs_brelse4(&qbh); - - /* - * Made it. - */ - - end: - end_add: - hpfs_unlock(dir->i_sb); - d_add(dentry, result); - return NULL; - - /* - * Didn't. - */ - bail1: - - hpfs_brelse4(&qbh); - - /*bail:*/ - - hpfs_unlock(dir->i_sb); - return ERR_PTR(-ENOENT); -} - -const struct file_operations hpfs_dir_ops = -{ - .llseek = hpfs_dir_lseek, - .read = generic_read_dir, - .readdir = hpfs_readdir, - .release = hpfs_dir_release, - .fsync = hpfs_file_fsync, -}; |