diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/hpfs/namei.c')
| -rw-r--r-- | ANDROID_3.4.5/fs/hpfs/namei.c | 628 |
1 files changed, 0 insertions, 628 deletions
diff --git a/ANDROID_3.4.5/fs/hpfs/namei.c b/ANDROID_3.4.5/fs/hpfs/namei.c deleted file mode 100644 index 30dd7b10..00000000 --- a/ANDROID_3.4.5/fs/hpfs/namei.c +++ /dev/null @@ -1,628 +0,0 @@ -/* - * linux/fs/hpfs/namei.c - * - * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999 - * - * adding & removing files & directories - */ -#include <linux/sched.h> -#include "hpfs_fn.h" - -static int hpfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) -{ - const unsigned char *name = dentry->d_name.name; - unsigned len = dentry->d_name.len; - struct quad_buffer_head qbh0; - struct buffer_head *bh; - struct hpfs_dirent *de; - struct fnode *fnode; - struct dnode *dnode; - struct inode *result; - fnode_secno fno; - dnode_secno dno; - int r; - struct hpfs_dirent dee; - int err; - if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err; - hpfs_lock(dir->i_sb); - err = -ENOSPC; - fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh); - if (!fnode) - goto bail; - dnode = hpfs_alloc_dnode(dir->i_sb, fno, &dno, &qbh0); - if (!dnode) - goto bail1; - memset(&dee, 0, sizeof dee); - dee.directory = 1; - if (!(mode & 0222)) dee.read_only = 1; - /*dee.archive = 0;*/ - dee.hidden = name[0] == '.'; - dee.fnode = cpu_to_le32(fno); - dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds())); - result = new_inode(dir->i_sb); - if (!result) - goto bail2; - hpfs_init_inode(result); - result->i_ino = fno; - hpfs_i(result)->i_parent_dir = dir->i_ino; - hpfs_i(result)->i_dno = dno; - result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date)); - result->i_ctime.tv_nsec = 0; - result->i_mtime.tv_nsec = 0; - result->i_atime.tv_nsec = 0; - hpfs_i(result)->i_ea_size = 0; - result->i_mode |= S_IFDIR; - result->i_op = &hpfs_dir_iops; - result->i_fop = &hpfs_dir_ops; - result->i_blocks = 4; - result->i_size = 2048; - set_nlink(result, 2); - if (dee.read_only) - result->i_mode &= ~0222; - - r = hpfs_add_dirent(dir, name, len, &dee); - if (r == 1) - goto bail3; - if (r == -1) { - err = -EEXIST; - goto bail3; - } - fnode->len = len; - memcpy(fnode->name, name, len > 15 ? 15 : len); - fnode->up = cpu_to_le32(dir->i_ino); - fnode->dirflag = 1; - fnode->btree.n_free_nodes = 7; - fnode->btree.n_used_nodes = 1; - fnode->btree.first_free = cpu_to_le16(0x14); - fnode->u.external[0].disk_secno = cpu_to_le32(dno); - fnode->u.external[0].file_secno = cpu_to_le32(-1); - dnode->root_dnode = 1; - dnode->up = cpu_to_le32(fno); - de = hpfs_add_de(dir->i_sb, dnode, "\001\001", 2, 0); - de->creation_date = de->write_date = de->read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds())); - if (!(mode & 0222)) de->read_only = 1; - de->first = de->directory = 1; - /*de->hidden = de->system = 0;*/ - de->fnode = cpu_to_le32(fno); - mark_buffer_dirty(bh); - brelse(bh); - hpfs_mark_4buffers_dirty(&qbh0); - hpfs_brelse4(&qbh0); - inc_nlink(dir); - insert_inode_hash(result); - - if (result->i_uid != current_fsuid() || - result->i_gid != current_fsgid() || - result->i_mode != (mode | S_IFDIR)) { - result->i_uid = current_fsuid(); - result->i_gid = current_fsgid(); - result->i_mode = mode | S_IFDIR; - hpfs_write_inode_nolock(result); - } - d_instantiate(dentry, result); - hpfs_unlock(dir->i_sb); - return 0; -bail3: - iput(result); -bail2: - hpfs_brelse4(&qbh0); - hpfs_free_dnode(dir->i_sb, dno); -bail1: - brelse(bh); - hpfs_free_sectors(dir->i_sb, fno, 1); -bail: - hpfs_unlock(dir->i_sb); - return err; -} - -static int hpfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, struct nameidata *nd) -{ - const unsigned char *name = dentry->d_name.name; - unsigned len = dentry->d_name.len; - struct inode *result = NULL; - struct buffer_head *bh; - struct fnode *fnode; - fnode_secno fno; - int r; - struct hpfs_dirent dee; - int err; - if ((err = hpfs_chk_name(name, &len))) - return err==-ENOENT ? -EINVAL : err; - hpfs_lock(dir->i_sb); - err = -ENOSPC; - fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh); - if (!fnode) - goto bail; - memset(&dee, 0, sizeof dee); - if (!(mode & 0222)) dee.read_only = 1; - dee.archive = 1; - dee.hidden = name[0] == '.'; - dee.fnode = cpu_to_le32(fno); - dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds())); - - result = new_inode(dir->i_sb); - if (!result) - goto bail1; - - hpfs_init_inode(result); - result->i_ino = fno; - 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); - hpfs_i(result)->i_parent_dir = dir->i_ino; - result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date)); - result->i_ctime.tv_nsec = 0; - result->i_mtime.tv_nsec = 0; - result->i_atime.tv_nsec = 0; - hpfs_i(result)->i_ea_size = 0; - if (dee.read_only) - result->i_mode &= ~0222; - result->i_blocks = 1; - result->i_size = 0; - result->i_data.a_ops = &hpfs_aops; - hpfs_i(result)->mmu_private = 0; - - r = hpfs_add_dirent(dir, name, len, &dee); - if (r == 1) - goto bail2; - if (r == -1) { - err = -EEXIST; - goto bail2; - } - fnode->len = len; - memcpy(fnode->name, name, len > 15 ? 15 : len); - fnode->up = cpu_to_le32(dir->i_ino); - mark_buffer_dirty(bh); - brelse(bh); - - insert_inode_hash(result); - - if (result->i_uid != current_fsuid() || - result->i_gid != current_fsgid() || - result->i_mode != (mode | S_IFREG)) { - result->i_uid = current_fsuid(); - result->i_gid = current_fsgid(); - result->i_mode = mode | S_IFREG; - hpfs_write_inode_nolock(result); - } - d_instantiate(dentry, result); - hpfs_unlock(dir->i_sb); - return 0; - -bail2: - iput(result); -bail1: - brelse(bh); - hpfs_free_sectors(dir->i_sb, fno, 1); -bail: - hpfs_unlock(dir->i_sb); - return err; -} - -static int hpfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev) -{ - const unsigned char *name = dentry->d_name.name; - unsigned len = dentry->d_name.len; - struct buffer_head *bh; - struct fnode *fnode; - fnode_secno fno; - int r; - struct hpfs_dirent dee; - struct inode *result = NULL; - int err; - if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err; - if (hpfs_sb(dir->i_sb)->sb_eas < 2) return -EPERM; - if (!new_valid_dev(rdev)) - return -EINVAL; - hpfs_lock(dir->i_sb); - err = -ENOSPC; - fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh); - if (!fnode) - goto bail; - memset(&dee, 0, sizeof dee); - if (!(mode & 0222)) dee.read_only = 1; - dee.archive = 1; - dee.hidden = name[0] == '.'; - dee.fnode = cpu_to_le32(fno); - dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds())); - - result = new_inode(dir->i_sb); - if (!result) - goto bail1; - - hpfs_init_inode(result); - result->i_ino = fno; - hpfs_i(result)->i_parent_dir = dir->i_ino; - result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date)); - result->i_ctime.tv_nsec = 0; - result->i_mtime.tv_nsec = 0; - result->i_atime.tv_nsec = 0; - hpfs_i(result)->i_ea_size = 0; - result->i_uid = current_fsuid(); - result->i_gid = current_fsgid(); - set_nlink(result, 1); - result->i_size = 0; - result->i_blocks = 1; - init_special_inode(result, mode, rdev); - - r = hpfs_add_dirent(dir, name, len, &dee); - if (r == 1) - goto bail2; - if (r == -1) { - err = -EEXIST; - goto bail2; - } - fnode->len = len; - memcpy(fnode->name, name, len > 15 ? 15 : len); - fnode->up = cpu_to_le32(dir->i_ino); - mark_buffer_dirty(bh); - - insert_inode_hash(result); - - hpfs_write_inode_nolock(result); - d_instantiate(dentry, result); - brelse(bh); - hpfs_unlock(dir->i_sb); - return 0; -bail2: - iput(result); -bail1: - brelse(bh); - hpfs_free_sectors(dir->i_sb, fno, 1); -bail: - hpfs_unlock(dir->i_sb); - return err; -} - -static int hpfs_symlink(struct inode *dir, struct dentry *dentry, const char *symlink) -{ - const unsigned char *name = dentry->d_name.name; - unsigned len = dentry->d_name.len; - struct buffer_head *bh; - struct fnode *fnode; - fnode_secno fno; - int r; - struct hpfs_dirent dee; - struct inode *result; - int err; - if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err; - hpfs_lock(dir->i_sb); - if (hpfs_sb(dir->i_sb)->sb_eas < 2) { - hpfs_unlock(dir->i_sb); - return -EPERM; - } - err = -ENOSPC; - fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh); - if (!fnode) - goto bail; - memset(&dee, 0, sizeof dee); - dee.archive = 1; - dee.hidden = name[0] == '.'; - dee.fnode = cpu_to_le32(fno); - dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds())); - - result = new_inode(dir->i_sb); - if (!result) - goto bail1; - result->i_ino = fno; - hpfs_init_inode(result); - hpfs_i(result)->i_parent_dir = dir->i_ino; - result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date)); - result->i_ctime.tv_nsec = 0; - result->i_mtime.tv_nsec = 0; - result->i_atime.tv_nsec = 0; - hpfs_i(result)->i_ea_size = 0; - result->i_mode = S_IFLNK | 0777; - result->i_uid = current_fsuid(); - result->i_gid = current_fsgid(); - result->i_blocks = 1; - set_nlink(result, 1); - result->i_size = strlen(symlink); - result->i_op = &page_symlink_inode_operations; - result->i_data.a_ops = &hpfs_symlink_aops; - - r = hpfs_add_dirent(dir, name, len, &dee); - if (r == 1) - goto bail2; - if (r == -1) { - err = -EEXIST; - goto bail2; - } - fnode->len = len; - memcpy(fnode->name, name, len > 15 ? 15 : len); - fnode->up = cpu_to_le32(dir->i_ino); - hpfs_set_ea(result, fnode, "SYMLINK", symlink, strlen(symlink)); - mark_buffer_dirty(bh); - brelse(bh); - - insert_inode_hash(result); - - hpfs_write_inode_nolock(result); - d_instantiate(dentry, result); - hpfs_unlock(dir->i_sb); - return 0; -bail2: - iput(result); -bail1: - brelse(bh); - hpfs_free_sectors(dir->i_sb, fno, 1); -bail: - hpfs_unlock(dir->i_sb); - return err; -} - -static int hpfs_unlink(struct inode *dir, struct dentry *dentry) -{ - const unsigned char *name = dentry->d_name.name; - unsigned len = dentry->d_name.len; - struct quad_buffer_head qbh; - struct hpfs_dirent *de; - struct inode *inode = dentry->d_inode; - dnode_secno dno; - int r; - int rep = 0; - int err; - - hpfs_lock(dir->i_sb); - hpfs_adjust_length(name, &len); -again: - err = -ENOENT; - de = map_dirent(dir, hpfs_i(dir)->i_dno, name, len, &dno, &qbh); - if (!de) - goto out; - - err = -EPERM; - if (de->first) - goto out1; - - err = -EISDIR; - if (de->directory) - goto out1; - - r = hpfs_remove_dirent(dir, dno, de, &qbh, 1); - switch (r) { - case 1: - hpfs_error(dir->i_sb, "there was error when removing dirent"); - err = -EFSERROR; - break; - case 2: /* no space for deleting, try to truncate file */ - - err = -ENOSPC; - if (rep++) - break; - - dentry_unhash(dentry); - if (!d_unhashed(dentry)) { - hpfs_unlock(dir->i_sb); - return -ENOSPC; - } - if (generic_permission(inode, MAY_WRITE) || - !S_ISREG(inode->i_mode) || - get_write_access(inode)) { - d_rehash(dentry); - } else { - struct iattr newattrs; - /*printk("HPFS: truncating file before delete.\n");*/ - newattrs.ia_size = 0; - newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME; - err = notify_change(dentry, &newattrs); - put_write_access(inode); - if (!err) - goto again; - } - hpfs_unlock(dir->i_sb); - return -ENOSPC; - default: - drop_nlink(inode); - err = 0; - } - goto out; - -out1: - hpfs_brelse4(&qbh); -out: - hpfs_unlock(dir->i_sb); - return err; -} - -static int hpfs_rmdir(struct inode *dir, struct dentry *dentry) -{ - const unsigned char *name = dentry->d_name.name; - unsigned len = dentry->d_name.len; - struct quad_buffer_head qbh; - struct hpfs_dirent *de; - struct inode *inode = dentry->d_inode; - dnode_secno dno; - int n_items = 0; - int err; - int r; - - hpfs_adjust_length(name, &len); - hpfs_lock(dir->i_sb); - err = -ENOENT; - de = map_dirent(dir, hpfs_i(dir)->i_dno, name, len, &dno, &qbh); - if (!de) - goto out; - - err = -EPERM; - if (de->first) - goto out1; - - err = -ENOTDIR; - if (!de->directory) - goto out1; - - hpfs_count_dnodes(dir->i_sb, hpfs_i(inode)->i_dno, NULL, NULL, &n_items); - err = -ENOTEMPTY; - if (n_items) - goto out1; - - r = hpfs_remove_dirent(dir, dno, de, &qbh, 1); - switch (r) { - case 1: - hpfs_error(dir->i_sb, "there was error when removing dirent"); - err = -EFSERROR; - break; - case 2: - err = -ENOSPC; - break; - default: - drop_nlink(dir); - clear_nlink(inode); - err = 0; - } - goto out; -out1: - hpfs_brelse4(&qbh); -out: - hpfs_unlock(dir->i_sb); - return err; -} - -static int hpfs_symlink_readpage(struct file *file, struct page *page) -{ - char *link = kmap(page); - struct inode *i = page->mapping->host; - struct fnode *fnode; - struct buffer_head *bh; - int err; - - err = -EIO; - hpfs_lock(i->i_sb); - if (!(fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh))) - goto fail; - err = hpfs_read_ea(i->i_sb, fnode, "SYMLINK", link, PAGE_SIZE); - brelse(bh); - if (err) - goto fail; - hpfs_unlock(i->i_sb); - SetPageUptodate(page); - kunmap(page); - unlock_page(page); - return 0; - -fail: - hpfs_unlock(i->i_sb); - SetPageError(page); - kunmap(page); - unlock_page(page); - return err; -} - -const struct address_space_operations hpfs_symlink_aops = { - .readpage = hpfs_symlink_readpage -}; - -static int hpfs_rename(struct inode *old_dir, struct dentry *old_dentry, - struct inode *new_dir, struct dentry *new_dentry) -{ - const unsigned char *old_name = old_dentry->d_name.name; - unsigned old_len = old_dentry->d_name.len; - const unsigned char *new_name = new_dentry->d_name.name; - unsigned new_len = new_dentry->d_name.len; - struct inode *i = old_dentry->d_inode; - struct inode *new_inode = new_dentry->d_inode; - struct quad_buffer_head qbh, qbh1; - struct hpfs_dirent *dep, *nde; - struct hpfs_dirent de; - dnode_secno dno; - int r; - struct buffer_head *bh; - struct fnode *fnode; - int err; - - if ((err = hpfs_chk_name(new_name, &new_len))) return err; - err = 0; - hpfs_adjust_length(old_name, &old_len); - - hpfs_lock(i->i_sb); - /* order doesn't matter, due to VFS exclusion */ - - /* Erm? Moving over the empty non-busy directory is perfectly legal */ - if (new_inode && S_ISDIR(new_inode->i_mode)) { - err = -EINVAL; - goto end1; - } - - if (!(dep = map_dirent(old_dir, hpfs_i(old_dir)->i_dno, old_name, old_len, &dno, &qbh))) { - hpfs_error(i->i_sb, "lookup succeeded but map dirent failed"); - err = -ENOENT; - goto end1; - } - copy_de(&de, dep); - de.hidden = new_name[0] == '.'; - - if (new_inode) { - int r; - if ((r = hpfs_remove_dirent(old_dir, dno, dep, &qbh, 1)) != 2) { - if ((nde = map_dirent(new_dir, hpfs_i(new_dir)->i_dno, new_name, new_len, NULL, &qbh1))) { - clear_nlink(new_inode); - copy_de(nde, &de); - memcpy(nde->name, new_name, new_len); - hpfs_mark_4buffers_dirty(&qbh1); - hpfs_brelse4(&qbh1); - goto end; - } - hpfs_error(new_dir->i_sb, "hpfs_rename: could not find dirent"); - err = -EFSERROR; - goto end1; - } - err = r == 2 ? -ENOSPC : r == 1 ? -EFSERROR : 0; - goto end1; - } - - if (new_dir == old_dir) hpfs_brelse4(&qbh); - - if ((r = hpfs_add_dirent(new_dir, new_name, new_len, &de))) { - if (r == -1) hpfs_error(new_dir->i_sb, "hpfs_rename: dirent already exists!"); - err = r == 1 ? -ENOSPC : -EFSERROR; - if (new_dir != old_dir) hpfs_brelse4(&qbh); - goto end1; - } - - if (new_dir == old_dir) - if (!(dep = map_dirent(old_dir, hpfs_i(old_dir)->i_dno, old_name, old_len, &dno, &qbh))) { - hpfs_error(i->i_sb, "lookup succeeded but map dirent failed at #2"); - err = -ENOENT; - goto end1; - } - - if ((r = hpfs_remove_dirent(old_dir, dno, dep, &qbh, 0))) { - hpfs_error(i->i_sb, "hpfs_rename: could not remove dirent"); - err = r == 2 ? -ENOSPC : -EFSERROR; - goto end1; - } - - end: - hpfs_i(i)->i_parent_dir = new_dir->i_ino; - if (S_ISDIR(i->i_mode)) { - inc_nlink(new_dir); - drop_nlink(old_dir); - } - if ((fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh))) { - fnode->up = cpu_to_le32(new_dir->i_ino); - fnode->len = new_len; - memcpy(fnode->name, new_name, new_len>15?15:new_len); - if (new_len < 15) memset(&fnode->name[new_len], 0, 15 - new_len); - mark_buffer_dirty(bh); - brelse(bh); - } -end1: - hpfs_unlock(i->i_sb); - return err; -} - -const struct inode_operations hpfs_dir_iops = -{ - .create = hpfs_create, - .lookup = hpfs_lookup, - .unlink = hpfs_unlink, - .symlink = hpfs_symlink, - .mkdir = hpfs_mkdir, - .rmdir = hpfs_rmdir, - .mknod = hpfs_mknod, - .rename = hpfs_rename, - .setattr = hpfs_setattr, -}; |