fuse update for 5.2
-----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQSQHSd0lITzzeNWNm3h3BK/laaZPAUCXNpuRwAKCRDh3BK/laaZ PMq/AP9kLvB97JU2GbzIJq6wOjDV8whPE/a2Knx0fajvW3AEOAD+NQwdZLmVNql7 DkkY8lZ7fVut3TMj8jHhpIbv4P1R1AE= =qX6f -----END PGP SIGNATURE----- Merge tag 'fuse-update-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse Pull fuse update from Miklos Szeredi: "Add more caching controls for userspace filesystems to use, as well as bug fixes and cleanups" * tag 'fuse-update-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse: fuse: clean up fuse_alloc_inode fuse: Add ioctl flag for x32 compat ioctl fuse: Convert fusectl to use the new mount API fuse: fix changelog entry for protocol 7.9 fuse: fix changelog entry for protocol 7.12 fuse: document fuse_fsync_in.fsync_flags fuse: Add FOPEN_STREAM to use stream_open() fuse: require /dev/fuse reads to have enough buffer capacity fuse: retrieve: cap requested size to negotiated max_write fuse: allow filesystems to have precise control over data cache fuse: convert printk -> pr_* fuse: honor RLIMIT_FSIZE in fuse_file_fallocate fuse: fix writepages on 32bit
This commit is contained in:
Linus Torvalds
Коммит
4856118f49
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@ -10,6 +10,7 @@
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/fs_context.h>
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#define FUSE_CTL_SUPER_MAGIC 0x65735543
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@ -317,7 +318,7 @@ void fuse_ctl_remove_conn(struct fuse_conn *fc)
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drop_nlink(d_inode(fuse_control_sb->s_root));
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}
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static int fuse_ctl_fill_super(struct super_block *sb, void *data, int silent)
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static int fuse_ctl_fill_super(struct super_block *sb, struct fs_context *fctx)
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{
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static const struct tree_descr empty_descr = {""};
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struct fuse_conn *fc;
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@ -343,10 +344,19 @@ static int fuse_ctl_fill_super(struct super_block *sb, void *data, int silent)
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return 0;
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}
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static struct dentry *fuse_ctl_mount(struct file_system_type *fs_type,
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int flags, const char *dev_name, void *raw_data)
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static int fuse_ctl_get_tree(struct fs_context *fc)
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{
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return mount_single(fs_type, flags, raw_data, fuse_ctl_fill_super);
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return vfs_get_super(fc, vfs_get_single_super, fuse_ctl_fill_super);
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}
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static const struct fs_context_operations fuse_ctl_context_ops = {
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.get_tree = fuse_ctl_get_tree,
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};
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static int fuse_ctl_init_fs_context(struct fs_context *fc)
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{
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fc->ops = &fuse_ctl_context_ops;
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return 0;
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}
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static void fuse_ctl_kill_sb(struct super_block *sb)
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@ -365,7 +375,7 @@ static void fuse_ctl_kill_sb(struct super_block *sb)
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static struct file_system_type fuse_ctl_fs_type = {
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.owner = THIS_MODULE,
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.name = "fusectl",
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.mount = fuse_ctl_mount,
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.init_fs_context = fuse_ctl_init_fs_context,
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.kill_sb = fuse_ctl_kill_sb,
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};
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MODULE_ALIAS_FS("fusectl");
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@ -33,6 +33,8 @@
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* closed.
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*/
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#define pr_fmt(fmt) "CUSE: " fmt
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#include <linux/fuse.h>
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#include <linux/cdev.h>
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#include <linux/device.h>
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@ -225,7 +227,7 @@ static int cuse_parse_one(char **pp, char *end, char **keyp, char **valp)
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return 0;
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if (end[-1] != '\0') {
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printk(KERN_ERR "CUSE: info not properly terminated\n");
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pr_err("info not properly terminated\n");
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return -EINVAL;
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}
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@ -242,7 +244,7 @@ static int cuse_parse_one(char **pp, char *end, char **keyp, char **valp)
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key = strstrip(key);
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if (!strlen(key)) {
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printk(KERN_ERR "CUSE: zero length info key specified\n");
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pr_err("zero length info key specified\n");
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return -EINVAL;
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}
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@ -282,12 +284,11 @@ static int cuse_parse_devinfo(char *p, size_t len, struct cuse_devinfo *devinfo)
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if (strcmp(key, "DEVNAME") == 0)
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devinfo->name = val;
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else
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printk(KERN_WARNING "CUSE: unknown device info \"%s\"\n",
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key);
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pr_warn("unknown device info \"%s\"\n", key);
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}
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if (!devinfo->name || !strlen(devinfo->name)) {
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printk(KERN_ERR "CUSE: DEVNAME unspecified\n");
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pr_err("DEVNAME unspecified\n");
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return -EINVAL;
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}
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@ -341,7 +342,7 @@ static void cuse_process_init_reply(struct fuse_conn *fc, struct fuse_req *req)
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else
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rc = register_chrdev_region(devt, 1, devinfo.name);
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if (rc) {
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printk(KERN_ERR "CUSE: failed to register chrdev region\n");
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pr_err("failed to register chrdev region\n");
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goto err;
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}
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@ -906,8 +906,8 @@ static int fuse_check_page(struct page *page)
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1 << PG_lru |
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1 << PG_active |
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1 << PG_reclaim))) {
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printk(KERN_WARNING "fuse: trying to steal weird page\n");
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printk(KERN_WARNING " page=%p index=%li flags=%08lx, count=%i, mapcount=%i, mapping=%p\n", page, page->index, page->flags, page_count(page), page_mapcount(page), page->mapping);
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pr_warn("trying to steal weird page\n");
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pr_warn(" page=%p index=%li flags=%08lx, count=%i, mapcount=%i, mapping=%p\n", page, page->index, page->flags, page_count(page), page_mapcount(page), page->mapping);
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return 1;
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}
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return 0;
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@ -1317,6 +1317,16 @@ static ssize_t fuse_dev_do_read(struct fuse_dev *fud, struct file *file,
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unsigned reqsize;
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unsigned int hash;
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/*
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* Require sane minimum read buffer - that has capacity for fixed part
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* of any request header + negotated max_write room for data. If the
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* requirement is not satisfied return EINVAL to the filesystem server
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* to indicate that it is not following FUSE server/client contract.
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* Don't dequeue / abort any request.
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*/
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if (nbytes < max_t(size_t, FUSE_MIN_READ_BUFFER, 4096 + fc->max_write))
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return -EINVAL;
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restart:
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spin_lock(&fiq->waitq.lock);
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err = -EAGAIN;
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@ -1749,7 +1759,7 @@ static int fuse_retrieve(struct fuse_conn *fc, struct inode *inode,
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offset = outarg->offset & ~PAGE_MASK;
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file_size = i_size_read(inode);
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num = outarg->size;
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num = min(outarg->size, fc->max_write);
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if (outarg->offset > file_size)
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num = 0;
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else if (outarg->offset + num > file_size)
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@ -178,7 +178,9 @@ void fuse_finish_open(struct inode *inode, struct file *file)
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if (!(ff->open_flags & FOPEN_KEEP_CACHE))
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invalidate_inode_pages2(inode->i_mapping);
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if (ff->open_flags & FOPEN_NONSEEKABLE)
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if (ff->open_flags & FOPEN_STREAM)
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stream_open(inode, file);
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else if (ff->open_flags & FOPEN_NONSEEKABLE)
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nonseekable_open(inode, file);
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if (fc->atomic_o_trunc && (file->f_flags & O_TRUNC)) {
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struct fuse_inode *fi = get_fuse_inode(inode);
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@ -462,7 +464,7 @@ int fuse_fsync_common(struct file *file, loff_t start, loff_t end,
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memset(&inarg, 0, sizeof(inarg));
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inarg.fh = ff->fh;
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inarg.fsync_flags = datasync ? 1 : 0;
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inarg.fsync_flags = datasync ? FUSE_FSYNC_FDATASYNC : 0;
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args.in.h.opcode = opcode;
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args.in.h.nodeid = get_node_id(inode);
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args.in.numargs = 1;
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@ -1586,7 +1588,7 @@ __acquires(fi->lock)
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{
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struct fuse_conn *fc = get_fuse_conn(inode);
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struct fuse_inode *fi = get_fuse_inode(inode);
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size_t crop = i_size_read(inode);
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loff_t crop = i_size_read(inode);
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struct fuse_req *req;
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while (fi->writectr >= 0 && !list_empty(&fi->queued_writes)) {
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@ -2576,8 +2578,13 @@ long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg,
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#if BITS_PER_LONG == 32
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inarg.flags |= FUSE_IOCTL_32BIT;
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#else
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if (flags & FUSE_IOCTL_COMPAT)
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if (flags & FUSE_IOCTL_COMPAT) {
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inarg.flags |= FUSE_IOCTL_32BIT;
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#ifdef CONFIG_X86_X32
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if (in_x32_syscall())
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inarg.flags |= FUSE_IOCTL_COMPAT_X32;
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#endif
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}
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#endif
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/* assume all the iovs returned by client always fits in a page */
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@ -3044,6 +3051,13 @@ static long fuse_file_fallocate(struct file *file, int mode, loff_t offset,
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}
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}
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if (!(mode & FALLOC_FL_KEEP_SIZE) &&
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offset + length > i_size_read(inode)) {
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err = inode_newsize_ok(inode, offset + length);
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if (err)
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return err;
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}
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if (!(mode & FALLOC_FL_KEEP_SIZE))
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set_bit(FUSE_I_SIZE_UNSTABLE, &fi->state);
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@ -9,6 +9,10 @@
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#ifndef _FS_FUSE_I_H
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#define _FS_FUSE_I_H
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#ifndef pr_fmt
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# define pr_fmt(fmt) "fuse: " fmt
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#endif
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#include <linux/fuse.h>
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#include <linux/fs.h>
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#include <linux/mount.h>
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@ -690,6 +694,9 @@ struct fuse_conn {
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/** Use enhanced/automatic page cache invalidation. */
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unsigned auto_inval_data:1;
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/** Filesystem is fully reponsible for page cache invalidation. */
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unsigned explicit_inval_data:1;
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/** Does the filesystem support readdirplus? */
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unsigned do_readdirplus:1;
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@ -81,14 +81,12 @@ struct fuse_forget_link *fuse_alloc_forget(void)
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static struct inode *fuse_alloc_inode(struct super_block *sb)
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{
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struct inode *inode;
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struct fuse_inode *fi;
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inode = kmem_cache_alloc(fuse_inode_cachep, GFP_KERNEL);
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if (!inode)
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fi = kmem_cache_alloc(fuse_inode_cachep, GFP_KERNEL);
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if (!fi)
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return NULL;
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fi = get_fuse_inode(inode);
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fi->i_time = 0;
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fi->inval_mask = 0;
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fi->nodeid = 0;
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@ -100,11 +98,11 @@ static struct inode *fuse_alloc_inode(struct super_block *sb)
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spin_lock_init(&fi->lock);
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fi->forget = fuse_alloc_forget();
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if (!fi->forget) {
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kmem_cache_free(fuse_inode_cachep, inode);
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kmem_cache_free(fuse_inode_cachep, fi);
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return NULL;
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}
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return inode;
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return &fi->inode;
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}
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static void fuse_free_inode(struct inode *inode)
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@ -233,7 +231,8 @@ void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr,
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if (oldsize != attr->size) {
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truncate_pagecache(inode, attr->size);
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inval = true;
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if (!fc->explicit_inval_data)
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inval = true;
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} else if (fc->auto_inval_data) {
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struct timespec64 new_mtime = {
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.tv_sec = attr->mtime,
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@ -908,6 +907,8 @@ static void process_init_reply(struct fuse_conn *fc, struct fuse_req *req)
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fc->dont_mask = 1;
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if (arg->flags & FUSE_AUTO_INVAL_DATA)
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fc->auto_inval_data = 1;
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else if (arg->flags & FUSE_EXPLICIT_INVAL_DATA)
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fc->explicit_inval_data = 1;
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if (arg->flags & FUSE_DO_READDIRPLUS) {
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fc->do_readdirplus = 1;
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if (arg->flags & FUSE_READDIRPLUS_AUTO)
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@ -969,7 +970,7 @@ static void fuse_send_init(struct fuse_conn *fc, struct fuse_req *req)
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FUSE_WRITEBACK_CACHE | FUSE_NO_OPEN_SUPPORT |
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FUSE_PARALLEL_DIROPS | FUSE_HANDLE_KILLPRIV | FUSE_POSIX_ACL |
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FUSE_ABORT_ERROR | FUSE_MAX_PAGES | FUSE_CACHE_SYMLINKS |
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FUSE_NO_OPENDIR_SUPPORT;
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FUSE_NO_OPENDIR_SUPPORT | FUSE_EXPLICIT_INVAL_DATA;
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req->in.h.opcode = FUSE_INIT;
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req->in.numargs = 1;
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req->in.args[0].size = sizeof(*arg);
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@ -1393,8 +1394,8 @@ static int __init fuse_init(void)
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{
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int res;
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printk(KERN_INFO "fuse init (API version %i.%i)\n",
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FUSE_KERNEL_VERSION, FUSE_KERNEL_MINOR_VERSION);
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pr_info("init (API version %i.%i)\n",
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FUSE_KERNEL_VERSION, FUSE_KERNEL_MINOR_VERSION);
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INIT_LIST_HEAD(&fuse_conn_list);
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res = fuse_fs_init();
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@ -1430,7 +1431,7 @@ static int __init fuse_init(void)
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static void __exit fuse_exit(void)
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{
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printk(KERN_DEBUG "fuse exit\n");
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pr_debug("exit\n");
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fuse_ctl_cleanup();
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fuse_sysfs_cleanup();
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@ -44,6 +44,7 @@
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* - add lock_owner field to fuse_setattr_in, fuse_read_in and fuse_write_in
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* - add blksize field to fuse_attr
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* - add file flags field to fuse_read_in and fuse_write_in
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* - Add ATIME_NOW and MTIME_NOW flags to fuse_setattr_in
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*
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* 7.10
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* - add nonseekable open flag
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@ -54,7 +55,7 @@
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* - add POLL message and NOTIFY_POLL notification
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*
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* 7.12
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* - add umask flag to input argument of open, mknod and mkdir
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* - add umask flag to input argument of create, mknod and mkdir
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* - add notification messages for invalidation of inodes and
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* directory entries
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*
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@ -125,6 +126,10 @@
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*
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* 7.29
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* - add FUSE_NO_OPENDIR_SUPPORT flag
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*
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* 7.30
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* - add FUSE_EXPLICIT_INVAL_DATA
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* - add FUSE_IOCTL_COMPAT_X32
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*/
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#ifndef _LINUX_FUSE_H
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@ -160,7 +165,7 @@
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#define FUSE_KERNEL_VERSION 7
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/** Minor version number of this interface */
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#define FUSE_KERNEL_MINOR_VERSION 29
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#define FUSE_KERNEL_MINOR_VERSION 30
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/** The node ID of the root inode */
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#define FUSE_ROOT_ID 1
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@ -229,11 +234,13 @@ struct fuse_file_lock {
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* FOPEN_KEEP_CACHE: don't invalidate the data cache on open
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* FOPEN_NONSEEKABLE: the file is not seekable
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* FOPEN_CACHE_DIR: allow caching this directory
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* FOPEN_STREAM: the file is stream-like (no file position at all)
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*/
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#define FOPEN_DIRECT_IO (1 << 0)
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#define FOPEN_KEEP_CACHE (1 << 1)
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#define FOPEN_NONSEEKABLE (1 << 2)
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#define FOPEN_CACHE_DIR (1 << 3)
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#define FOPEN_STREAM (1 << 4)
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/**
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* INIT request/reply flags
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@ -263,6 +270,7 @@ struct fuse_file_lock {
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* FUSE_MAX_PAGES: init_out.max_pages contains the max number of req pages
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* FUSE_CACHE_SYMLINKS: cache READLINK responses
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* FUSE_NO_OPENDIR_SUPPORT: kernel supports zero-message opendir
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* FUSE_EXPLICIT_INVAL_DATA: only invalidate cached pages on explicit request
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*/
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#define FUSE_ASYNC_READ (1 << 0)
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#define FUSE_POSIX_LOCKS (1 << 1)
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@ -289,6 +297,7 @@ struct fuse_file_lock {
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#define FUSE_MAX_PAGES (1 << 22)
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#define FUSE_CACHE_SYMLINKS (1 << 23)
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#define FUSE_NO_OPENDIR_SUPPORT (1 << 24)
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#define FUSE_EXPLICIT_INVAL_DATA (1 << 25)
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/**
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* CUSE INIT request/reply flags
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@ -335,6 +344,7 @@ struct fuse_file_lock {
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* FUSE_IOCTL_RETRY: retry with new iovecs
|
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* FUSE_IOCTL_32BIT: 32bit ioctl
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* FUSE_IOCTL_DIR: is a directory
|
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* FUSE_IOCTL_COMPAT_X32: x32 compat ioctl on 64bit machine (64bit time_t)
|
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*
|
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* FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs
|
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*/
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@ -343,6 +353,7 @@ struct fuse_file_lock {
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#define FUSE_IOCTL_RETRY (1 << 2)
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#define FUSE_IOCTL_32BIT (1 << 3)
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#define FUSE_IOCTL_DIR (1 << 4)
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#define FUSE_IOCTL_COMPAT_X32 (1 << 5)
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|
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#define FUSE_IOCTL_MAX_IOV 256
|
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|
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|
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@ -353,6 +364,13 @@ struct fuse_file_lock {
|
|||
*/
|
||||
#define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0)
|
||||
|
||||
/**
|
||||
* Fsync flags
|
||||
*
|
||||
* FUSE_FSYNC_FDATASYNC: Sync data only, not metadata
|
||||
*/
|
||||
#define FUSE_FSYNC_FDATASYNC (1 << 0)
|
||||
|
||||
enum fuse_opcode {
|
||||
FUSE_LOOKUP = 1,
|
||||
FUSE_FORGET = 2, /* no reply */
|
||||
|
|
|
|||
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