QNX 4 and QNX 6 (the latter is also called QNX RTP).
Further information is available at <http://www.qnx.com/>.
Say Y if you intend to mount QNX hard disks or floppies.
- Unless you say Y to "QNX4FS read-write support" below, you will
- only be able to read these file systems.
To compile this file system support as a module, choose M here: the
module will be called qnx4.
If you don't know whether you need it, then you don't need it:
answer N.
-
-config QNX4FS_RW
- bool "QNX4FS write support (DANGEROUS)"
- depends on QNX4FS_FS && EXPERIMENTAL && BROKEN
- help
- Say Y if you want to test write support for QNX4 file systems.
-
- It's currently broken, so for now:
- answer N.
obj-$(CONFIG_QNX4FS_FS) += qnx4.o
-qnx4-objs := inode.o dir.o namei.o file.o bitmap.o truncate.o
+qnx4-objs := inode.o dir.o namei.o bitmap.o
return total_free;
}
-
-#ifdef CONFIG_QNX4FS_RW
-
-int qnx4_is_free(struct super_block *sb, long block)
-{
- int start = le32_to_cpu(qnx4_sb(sb)->BitMap->di_first_xtnt.xtnt_blk) - 1;
- int size = le32_to_cpu(qnx4_sb(sb)->BitMap->di_size);
- struct buffer_head *bh;
- const char *g;
- int ret = -EIO;
-
- start += block / (QNX4_BLOCK_SIZE * 8);
- QNX4DEBUG(("qnx4: is_free requesting block [%lu], bitmap in block [%lu]\n",
- (unsigned long) block, (unsigned long) start));
- (void) size; /* CHECKME */
- bh = sb_bread(sb, start);
- if (bh == NULL) {
- return -EIO;
- }
- g = bh->b_data + (block % QNX4_BLOCK_SIZE);
- if (((*g) & (1 << (block % 8))) == 0) {
- QNX4DEBUG(("qnx4: is_free -> block is free\n"));
- ret = 1;
- } else {
- QNX4DEBUG(("qnx4: is_free -> block is busy\n"));
- ret = 0;
- }
- brelse(bh);
-
- return ret;
-}
-
-int qnx4_set_bitmap(struct super_block *sb, long block, int busy)
-{
- int start = le32_to_cpu(qnx4_sb(sb)->BitMap->di_first_xtnt.xtnt_blk) - 1;
- int size = le32_to_cpu(qnx4_sb(sb)->BitMap->di_size);
- struct buffer_head *bh;
- char *g;
-
- start += block / (QNX4_BLOCK_SIZE * 8);
- QNX4DEBUG(("qnx4: set_bitmap requesting block [%lu], bitmap in block [%lu]\n",
- (unsigned long) block, (unsigned long) start));
- (void) size; /* CHECKME */
- bh = sb_bread(sb, start);
- if (bh == NULL) {
- return -EIO;
- }
- g = bh->b_data + (block % QNX4_BLOCK_SIZE);
- if (busy == 0) {
- (*g) &= ~(1 << (block % 8));
- } else {
- (*g) |= (1 << (block % 8));
- }
- mark_buffer_dirty(bh);
- brelse(bh);
-
- return 0;
-}
-
-static void qnx4_clear_inode(struct inode *inode)
-{
- struct qnx4_inode_entry *qnx4_ino = qnx4_raw_inode(inode);
- /* What for? */
- memset(qnx4_ino->di_fname, 0, sizeof qnx4_ino->di_fname);
- qnx4_ino->di_size = 0;
- qnx4_ino->di_num_xtnts = 0;
- qnx4_ino->di_mode = 0;
- qnx4_ino->di_status = 0;
-}
-
-void qnx4_free_inode(struct inode *inode)
-{
- if (inode->i_ino < 1) {
- printk("free_inode: inode 0 or nonexistent inode\n");
- return;
- }
- qnx4_clear_inode(inode);
- clear_inode(inode);
-}
-
-#endif
const struct inode_operations qnx4_dir_inode_operations =
{
.lookup = qnx4_lookup,
-#ifdef CONFIG_QNX4FS_RW
- .create = qnx4_create,
- .unlink = qnx4_unlink,
- .rmdir = qnx4_rmdir,
-#endif
};
+++ /dev/null
-/*
- * QNX4 file system, Linux implementation.
- *
- * Version : 0.2.1
- *
- * Using parts of the xiafs filesystem.
- *
- * History :
- *
- * 25-05-1998 by Richard Frowijn : first release.
- * 21-06-1998 by Frank Denis : wrote qnx4_readpage to use generic_file_read.
- * 27-06-1998 by Frank Denis : file overwriting.
- */
-
-#include "qnx4.h"
-
-/*
- * We have mostly NULL's here: the current defaults are ok for
- * the qnx4 filesystem.
- */
-const struct file_operations qnx4_file_operations =
-{
- .llseek = generic_file_llseek,
- .read = do_sync_read,
- .aio_read = generic_file_aio_read,
- .mmap = generic_file_mmap,
- .splice_read = generic_file_splice_read,
-#ifdef CONFIG_QNX4FS_RW
- .write = do_sync_write,
- .aio_write = generic_file_aio_write,
- .fsync = simple_fsync,
-#endif
-};
-
-const struct inode_operations qnx4_file_inode_operations =
-{
-#ifdef CONFIG_QNX4FS_RW
- .truncate = qnx4_truncate,
-#endif
-};
static const struct super_operations qnx4_sops;
-#ifdef CONFIG_QNX4FS_RW
-
-static void qnx4_delete_inode(struct inode *inode)
-{
- QNX4DEBUG(("qnx4: deleting inode [%lu]\n", (unsigned long) inode->i_ino));
- truncate_inode_pages(&inode->i_data, 0);
- inode->i_size = 0;
- qnx4_truncate(inode);
- lock_kernel();
- qnx4_free_inode(inode);
- unlock_kernel();
-}
-
-static int qnx4_write_inode(struct inode *inode, int do_sync)
-{
- struct qnx4_inode_entry *raw_inode;
- int block, ino;
- struct buffer_head *bh;
- ino = inode->i_ino;
-
- QNX4DEBUG(("qnx4: write inode 1.\n"));
- if (inode->i_nlink == 0) {
- return 0;
- }
- if (!ino) {
- printk("qnx4: bad inode number on dev %s: %d is out of range\n",
- inode->i_sb->s_id, ino);
- return -EIO;
- }
- QNX4DEBUG(("qnx4: write inode 2.\n"));
- block = ino / QNX4_INODES_PER_BLOCK;
- lock_kernel();
- if (!(bh = sb_bread(inode->i_sb, block))) {
- printk("qnx4: major problem: unable to read inode from dev "
- "%s\n", inode->i_sb->s_id);
- unlock_kernel();
- return -EIO;
- }
- raw_inode = ((struct qnx4_inode_entry *) bh->b_data) +
- (ino % QNX4_INODES_PER_BLOCK);
- raw_inode->di_mode = cpu_to_le16(inode->i_mode);
- raw_inode->di_uid = cpu_to_le16(fs_high2lowuid(inode->i_uid));
- raw_inode->di_gid = cpu_to_le16(fs_high2lowgid(inode->i_gid));
- raw_inode->di_nlink = cpu_to_le16(inode->i_nlink);
- raw_inode->di_size = cpu_to_le32(inode->i_size);
- raw_inode->di_mtime = cpu_to_le32(inode->i_mtime.tv_sec);
- raw_inode->di_atime = cpu_to_le32(inode->i_atime.tv_sec);
- raw_inode->di_ctime = cpu_to_le32(inode->i_ctime.tv_sec);
- raw_inode->di_first_xtnt.xtnt_size = cpu_to_le32(inode->i_blocks);
- mark_buffer_dirty(bh);
- if (do_sync) {
- sync_dirty_buffer(bh);
- if (buffer_req(bh) && !buffer_uptodate(bh)) {
- printk("qnx4: IO error syncing inode [%s:%08x]\n",
- inode->i_sb->s_id, ino);
- brelse(bh);
- unlock_kernel();
- return -EIO;
- }
- }
- brelse(bh);
- unlock_kernel();
- return 0;
-}
-
-#endif
-
static void qnx4_put_super(struct super_block *sb);
static struct inode *qnx4_alloc_inode(struct super_block *sb);
static void qnx4_destroy_inode(struct inode *inode);
.put_super = qnx4_put_super,
.statfs = qnx4_statfs,
.remount_fs = qnx4_remount,
-#ifdef CONFIG_QNX4FS_RW
- .write_inode = qnx4_write_inode,
- .delete_inode = qnx4_delete_inode,
-#endif
};
static int qnx4_remount(struct super_block *sb, int *flags, char *data)
qs = qnx4_sb(sb);
qs->Version = QNX4_VERSION;
-#ifndef CONFIG_QNX4FS_RW
*flags |= MS_RDONLY;
-#endif
- if (*flags & MS_RDONLY) {
- return 0;
- }
-
- mark_buffer_dirty(qs->sb_buf);
-
return 0;
}
}
s->s_op = &qnx4_sops;
s->s_magic = QNX4_SUPER_MAGIC;
-#ifndef CONFIG_QNX4FS_RW
s->s_flags |= MS_RDONLY; /* Yup, read-only yet */
-#endif
qnx4_sb(s)->sb_buf = bh;
qnx4_sb(s)->sb = (struct qnx4_super_block *) bh->b_data;
memcpy(qnx4_inode, raw_inode, QNX4_DIR_ENTRY_SIZE);
if (S_ISREG(inode->i_mode)) {
- inode->i_op = &qnx4_file_inode_operations;
- inode->i_fop = &qnx4_file_operations;
+ inode->i_fop = &generic_ro_fops;
inode->i_mapping->a_ops = &qnx4_aops;
qnx4_i(inode)->mmu_private = inode->i_size;
} else if (S_ISDIR(inode->i_mode)) {
return NULL;
}
-
-#ifdef CONFIG_QNX4FS_RW
-int qnx4_create(struct inode *dir, struct dentry *dentry, int mode,
- struct nameidata *nd)
-{
- QNX4DEBUG(("qnx4: qnx4_create\n"));
- if (dir == NULL) {
- return -ENOENT;
- }
- return -ENOSPC;
-}
-
-int qnx4_rmdir(struct inode *dir, struct dentry *dentry)
-{
- struct buffer_head *bh;
- struct qnx4_inode_entry *de;
- struct inode *inode;
- int retval;
- int ino;
-
- QNX4DEBUG(("qnx4: qnx4_rmdir [%s]\n", dentry->d_name.name));
- lock_kernel();
- bh = qnx4_find_entry(dentry->d_name.len, dir, dentry->d_name.name,
- &de, &ino);
- if (bh == NULL) {
- unlock_kernel();
- return -ENOENT;
- }
- inode = dentry->d_inode;
- if (inode->i_ino != ino) {
- retval = -EIO;
- goto end_rmdir;
- }
-#if 0
- if (!empty_dir(inode)) {
- retval = -ENOTEMPTY;
- goto end_rmdir;
- }
-#endif
- if (inode->i_nlink != 2) {
- QNX4DEBUG(("empty directory has nlink!=2 (%d)\n", inode->i_nlink));
- }
- QNX4DEBUG(("qnx4: deleting directory\n"));
- de->di_status = 0;
- memset(de->di_fname, 0, sizeof de->di_fname);
- de->di_mode = 0;
- mark_buffer_dirty_inode(bh, dir);
- clear_nlink(inode);
- mark_inode_dirty(inode);
- inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
- inode_dec_link_count(dir);
- retval = 0;
-
- end_rmdir:
- brelse(bh);
-
- unlock_kernel();
- return retval;
-}
-
-int qnx4_unlink(struct inode *dir, struct dentry *dentry)
-{
- struct buffer_head *bh;
- struct qnx4_inode_entry *de;
- struct inode *inode;
- int retval;
- int ino;
-
- QNX4DEBUG(("qnx4: qnx4_unlink [%s]\n", dentry->d_name.name));
- lock_kernel();
- bh = qnx4_find_entry(dentry->d_name.len, dir, dentry->d_name.name,
- &de, &ino);
- if (bh == NULL) {
- unlock_kernel();
- return -ENOENT;
- }
- inode = dentry->d_inode;
- if (inode->i_ino != ino) {
- retval = -EIO;
- goto end_unlink;
- }
- retval = -EPERM;
- if (!inode->i_nlink) {
- QNX4DEBUG(("Deleting nonexistent file (%s:%lu), %d\n",
- inode->i_sb->s_id,
- inode->i_ino, inode->i_nlink));
- inode->i_nlink = 1;
- }
- de->di_status = 0;
- memset(de->di_fname, 0, sizeof de->di_fname);
- de->di_mode = 0;
- mark_buffer_dirty_inode(bh, dir);
- dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
- mark_inode_dirty(dir);
- inode->i_ctime = dir->i_ctime;
- inode_dec_link_count(inode);
- retval = 0;
-
-end_unlink:
- unlock_kernel();
- brelse(bh);
-
- return retval;
-}
-#endif
extern struct buffer_head *qnx4_bread(struct inode *, int, int);
-extern const struct inode_operations qnx4_file_inode_operations;
extern const struct inode_operations qnx4_dir_inode_operations;
-extern const struct file_operations qnx4_file_operations;
extern const struct file_operations qnx4_dir_operations;
extern int qnx4_is_free(struct super_block *sb, long block);
-extern int qnx4_set_bitmap(struct super_block *sb, long block, int busy);
-extern int qnx4_create(struct inode *inode, struct dentry *dentry, int mode, struct nameidata *nd);
-extern void qnx4_truncate(struct inode *inode);
-extern void qnx4_free_inode(struct inode *inode);
-extern int qnx4_unlink(struct inode *dir, struct dentry *dentry);
-extern int qnx4_rmdir(struct inode *dir, struct dentry *dentry);
static inline struct qnx4_sb_info *qnx4_sb(struct super_block *sb)
{
+++ /dev/null
-/*
- * QNX4 file system, Linux implementation.
- *
- * Version : 0.1
- *
- * Using parts of the xiafs filesystem.
- *
- * History :
- *
- * 30-06-1998 by Frank DENIS : ugly filler.
- */
-
-#include <linux/smp_lock.h>
-#include "qnx4.h"
-
-#ifdef CONFIG_QNX4FS_RW
-
-void qnx4_truncate(struct inode *inode)
-{
- if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
- S_ISLNK(inode->i_mode))) {
- return;
- }
- lock_kernel();
- if (!(S_ISDIR(inode->i_mode))) {
- /* TODO */
- }
- QNX4DEBUG(("qnx4: qnx4_truncate called\n"));
- inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
- mark_inode_dirty(inode);
- unlock_kernel();
-}
-
-#endif
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff