/*
FUSE: Filesystem in Userspace
- Copyright (C) 2001-2005 Miklos Szeredi <miklos@szeredi.hu>
+ Copyright (C) 2001-2006 Miklos Szeredi <miklos@szeredi.hu>
This program can be distributed under the terms of the GNU GPL.
See the file COPYING.
#include <linux/sched.h>
#include <linux/namei.h>
+#if BITS_PER_LONG >= 64
+static inline void fuse_dentry_settime(struct dentry *entry, u64 time)
+{
+ entry->d_time = time;
+}
+
+static inline u64 fuse_dentry_time(struct dentry *entry)
+{
+ return entry->d_time;
+}
+#else
+/*
+ * On 32 bit archs store the high 32 bits of time in d_fsdata
+ */
+static void fuse_dentry_settime(struct dentry *entry, u64 time)
+{
+ entry->d_time = time;
+ entry->d_fsdata = (void *) (unsigned long) (time >> 32);
+}
+
+static u64 fuse_dentry_time(struct dentry *entry)
+{
+ return (u64) entry->d_time +
+ ((u64) (unsigned long) entry->d_fsdata << 32);
+}
+#endif
+
/*
* FUSE caches dentries and attributes with separate timeout. The
* time in jiffies until the dentry/attributes are valid is stored in
/*
* Calculate the time in jiffies until a dentry/attributes are valid
*/
-static inline unsigned long time_to_jiffies(unsigned long sec,
- unsigned long nsec)
+static u64 time_to_jiffies(unsigned long sec, unsigned long nsec)
{
- struct timespec ts = {sec, nsec};
- return jiffies + timespec_to_jiffies(&ts);
+ if (sec || nsec) {
+ struct timespec ts = {sec, nsec};
+ return get_jiffies_64() + timespec_to_jiffies(&ts);
+ } else
+ return 0;
}
/*
*/
static void fuse_change_timeout(struct dentry *entry, struct fuse_entry_out *o)
{
- entry->d_time = time_to_jiffies(o->entry_valid, o->entry_valid_nsec);
+ fuse_dentry_settime(entry,
+ time_to_jiffies(o->entry_valid, o->entry_valid_nsec));
if (entry->d_inode)
get_fuse_inode(entry->d_inode)->i_time =
time_to_jiffies(o->attr_valid, o->attr_valid_nsec);
*/
void fuse_invalidate_attr(struct inode *inode)
{
- get_fuse_inode(inode)->i_time = jiffies - 1;
+ get_fuse_inode(inode)->i_time = 0;
}
/*
*/
static void fuse_invalidate_entry_cache(struct dentry *entry)
{
- entry->d_time = jiffies - 1;
+ fuse_dentry_settime(entry, 0);
}
/*
{
req->in.h.opcode = FUSE_LOOKUP;
req->in.h.nodeid = get_node_id(dir);
- req->inode = dir;
req->in.numargs = 1;
req->in.args[0].size = entry->d_name.len + 1;
req->in.args[0].value = entry->d_name.name;
if (inode && is_bad_inode(inode))
return 0;
- else if (time_after(jiffies, entry->d_time)) {
+ else if (fuse_dentry_time(entry) < get_jiffies_64()) {
int err;
struct fuse_entry_out outarg;
struct fuse_conn *fc;
/* Doesn't hurt to "reset" the validity timeout */
fuse_invalidate_entry_cache(entry);
+
+ /* For negative dentries, always do a fresh lookup */
if (!inode)
return 0;
fc = get_fuse_conn(inode);
- req = fuse_get_request(fc);
- if (!req)
+ req = fuse_get_req(fc);
+ if (IS_ERR(req))
return 0;
fuse_lookup_init(req, entry->d_parent->d_inode, entry, &outarg);
request_send(fc, req);
err = req->out.h.error;
+ /* Zero nodeid is same as -ENOENT */
+ if (!err && !outarg.nodeid)
+ err = -ENOENT;
if (!err) {
struct fuse_inode *fi = get_fuse_inode(inode);
if (outarg.nodeid != get_node_id(inode)) {
return 0;
}
-static inline int invalid_nodeid(u64 nodeid)
+static int invalid_nodeid(u64 nodeid)
{
return !nodeid || nodeid == FUSE_ROOT_ID;
}
.d_revalidate = fuse_dentry_revalidate,
};
-static inline int valid_mode(int m)
+static int valid_mode(int m)
{
return S_ISREG(m) || S_ISDIR(m) || S_ISLNK(m) || S_ISCHR(m) ||
S_ISBLK(m) || S_ISFIFO(m) || S_ISSOCK(m);
if (entry->d_name.len > FUSE_NAME_MAX)
return ERR_PTR(-ENAMETOOLONG);
- req = fuse_get_request(fc);
- if (!req)
- return ERR_PTR(-EINTR);
+ req = fuse_get_req(fc);
+ if (IS_ERR(req))
+ return ERR_PTR(PTR_ERR(req));
fuse_lookup_init(req, dir, entry, &outarg);
request_send(fc, req);
err = req->out.h.error;
- if (!err && ((outarg.nodeid && invalid_nodeid(outarg.nodeid)) ||
- !valid_mode(outarg.attr.mode)))
+ /* Zero nodeid is same as -ENOENT, but with valid timeout */
+ if (!err && outarg.nodeid &&
+ (invalid_nodeid(outarg.nodeid) || !valid_mode(outarg.attr.mode)))
err = -EIO;
if (!err && outarg.nodeid) {
inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation,
}
/*
+ * Synchronous release for the case when something goes wrong in CREATE_OPEN
+ */
+static void fuse_sync_release(struct fuse_conn *fc, struct fuse_file *ff,
+ u64 nodeid, int flags)
+{
+ struct fuse_req *req;
+
+ req = fuse_release_fill(ff, nodeid, flags, FUSE_RELEASE);
+ req->force = 1;
+ request_send(fc, req);
+ fuse_put_request(fc, req);
+}
+
+/*
* Atomic create+open operation
*
* If the filesystem doesn't support this, then fall back to separate
struct inode *inode;
struct fuse_conn *fc = get_fuse_conn(dir);
struct fuse_req *req;
+ struct fuse_req *forget_req;
struct fuse_open_in inarg;
struct fuse_open_out outopen;
struct fuse_entry_out outentry;
struct file *file;
int flags = nd->intent.open.flags - 1;
- err = -ENOSYS;
if (fc->no_create)
- goto out;
+ return -ENOSYS;
- err = -EINTR;
- req = fuse_get_request(fc);
- if (!req)
- goto out;
+ forget_req = fuse_get_req(fc);
+ if (IS_ERR(forget_req))
+ return PTR_ERR(forget_req);
+ req = fuse_get_req(fc);
+ err = PTR_ERR(req);
+ if (IS_ERR(req))
+ goto out_put_forget_req;
+
+ err = -ENOMEM;
ff = fuse_file_alloc();
if (!ff)
goto out_put_request;
inarg.mode = mode;
req->in.h.opcode = FUSE_CREATE;
req->in.h.nodeid = get_node_id(dir);
- req->inode = dir;
req->in.numargs = 2;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
if (!S_ISREG(outentry.attr.mode) || invalid_nodeid(outentry.nodeid))
goto out_free_ff;
+ fuse_put_request(fc, req);
inode = fuse_iget(dir->i_sb, outentry.nodeid, outentry.generation,
&outentry.attr);
- err = -ENOMEM;
if (!inode) {
flags &= ~(O_CREAT | O_EXCL | O_TRUNC);
ff->fh = outopen.fh;
- /* Special release, with inode = NULL, this will
- trigger a 'forget' request when the release is
- complete */
- fuse_send_release(fc, ff, outentry.nodeid, NULL, flags, 0);
- goto out_put_request;
+ fuse_sync_release(fc, ff, outentry.nodeid, flags);
+ fuse_send_forget(fc, forget_req, outentry.nodeid, 1);
+ return -ENOMEM;
}
- fuse_put_request(fc, req);
+ fuse_put_request(fc, forget_req);
d_instantiate(entry, inode);
fuse_change_timeout(entry, &outentry);
file = lookup_instantiate_filp(nd, entry, generic_file_open);
if (IS_ERR(file)) {
ff->fh = outopen.fh;
- fuse_send_release(fc, ff, outentry.nodeid, inode, flags, 0);
+ fuse_sync_release(fc, ff, outentry.nodeid, flags);
return PTR_ERR(file);
}
fuse_finish_open(inode, file, ff, &outopen);
fuse_file_free(ff);
out_put_request:
fuse_put_request(fc, req);
- out:
+ out_put_forget_req:
+ fuse_put_request(fc, forget_req);
return err;
}
int err;
req->in.h.nodeid = get_node_id(dir);
- req->inode = dir;
req->out.numargs = 1;
req->out.args[0].size = sizeof(outarg);
req->out.args[0].value = &outarg;
{
struct fuse_mknod_in inarg;
struct fuse_conn *fc = get_fuse_conn(dir);
- struct fuse_req *req = fuse_get_request(fc);
- if (!req)
- return -EINTR;
+ struct fuse_req *req = fuse_get_req(fc);
+ if (IS_ERR(req))
+ return PTR_ERR(req);
memset(&inarg, 0, sizeof(inarg));
inarg.mode = mode;
{
struct fuse_mkdir_in inarg;
struct fuse_conn *fc = get_fuse_conn(dir);
- struct fuse_req *req = fuse_get_request(fc);
- if (!req)
- return -EINTR;
+ struct fuse_req *req = fuse_get_req(fc);
+ if (IS_ERR(req))
+ return PTR_ERR(req);
memset(&inarg, 0, sizeof(inarg));
inarg.mode = mode;
{
struct fuse_conn *fc = get_fuse_conn(dir);
unsigned len = strlen(link) + 1;
- struct fuse_req *req = fuse_get_request(fc);
- if (!req)
- return -EINTR;
+ struct fuse_req *req = fuse_get_req(fc);
+ if (IS_ERR(req))
+ return PTR_ERR(req);
req->in.h.opcode = FUSE_SYMLINK;
req->in.numargs = 2;
{
int err;
struct fuse_conn *fc = get_fuse_conn(dir);
- struct fuse_req *req = fuse_get_request(fc);
- if (!req)
- return -EINTR;
+ struct fuse_req *req = fuse_get_req(fc);
+ if (IS_ERR(req))
+ return PTR_ERR(req);
req->in.h.opcode = FUSE_UNLINK;
req->in.h.nodeid = get_node_id(dir);
- req->inode = dir;
req->in.numargs = 1;
req->in.args[0].size = entry->d_name.len + 1;
req->in.args[0].value = entry->d_name.name;
/* Set nlink to zero so the inode can be cleared, if
the inode does have more links this will be
discovered at the next lookup/getattr */
- inode->i_nlink = 0;
+ clear_nlink(inode);
fuse_invalidate_attr(inode);
fuse_invalidate_attr(dir);
fuse_invalidate_entry_cache(entry);
{
int err;
struct fuse_conn *fc = get_fuse_conn(dir);
- struct fuse_req *req = fuse_get_request(fc);
- if (!req)
- return -EINTR;
+ struct fuse_req *req = fuse_get_req(fc);
+ if (IS_ERR(req))
+ return PTR_ERR(req);
req->in.h.opcode = FUSE_RMDIR;
req->in.h.nodeid = get_node_id(dir);
- req->inode = dir;
req->in.numargs = 1;
req->in.args[0].size = entry->d_name.len + 1;
req->in.args[0].value = entry->d_name.name;
err = req->out.h.error;
fuse_put_request(fc, req);
if (!err) {
- entry->d_inode->i_nlink = 0;
+ clear_nlink(entry->d_inode);
fuse_invalidate_attr(dir);
fuse_invalidate_entry_cache(entry);
} else if (err == -EINTR)
int err;
struct fuse_rename_in inarg;
struct fuse_conn *fc = get_fuse_conn(olddir);
- struct fuse_req *req = fuse_get_request(fc);
- if (!req)
- return -EINTR;
+ struct fuse_req *req = fuse_get_req(fc);
+ if (IS_ERR(req))
+ return PTR_ERR(req);
memset(&inarg, 0, sizeof(inarg));
inarg.newdir = get_node_id(newdir);
req->in.h.opcode = FUSE_RENAME;
req->in.h.nodeid = get_node_id(olddir);
- req->inode = olddir;
- req->inode2 = newdir;
req->in.numargs = 3;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
struct fuse_link_in inarg;
struct inode *inode = entry->d_inode;
struct fuse_conn *fc = get_fuse_conn(inode);
- struct fuse_req *req = fuse_get_request(fc);
- if (!req)
- return -EINTR;
+ struct fuse_req *req = fuse_get_req(fc);
+ if (IS_ERR(req))
+ return PTR_ERR(req);
memset(&inarg, 0, sizeof(inarg));
inarg.oldnodeid = get_node_id(inode);
req->in.h.opcode = FUSE_LINK;
- req->inode2 = inode;
req->in.numargs = 2;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
int err;
struct fuse_attr_out arg;
struct fuse_conn *fc = get_fuse_conn(inode);
- struct fuse_req *req = fuse_get_request(fc);
- if (!req)
- return -EINTR;
+ struct fuse_req *req = fuse_get_req(fc);
+ if (IS_ERR(req))
+ return PTR_ERR(req);
req->in.h.opcode = FUSE_GETATTR;
req->in.h.nodeid = get_node_id(inode);
- req->inode = inode;
req->out.numargs = 1;
req->out.args[0].size = sizeof(arg);
req->out.args[0].value = &arg;
if (!fuse_allow_task(fc, current))
return -EACCES;
if (get_node_id(inode) != FUSE_ROOT_ID &&
- time_before_eq(jiffies, fi->i_time))
+ fi->i_time >= get_jiffies_64())
return 0;
return fuse_do_getattr(inode);
if (fc->no_access)
return 0;
- req = fuse_get_request(fc);
- if (!req)
- return -EINTR;
+ req = fuse_get_req(fc);
+ if (IS_ERR(req))
+ return PTR_ERR(req);
memset(&inarg, 0, sizeof(inarg));
inarg.mask = mask;
req->in.h.opcode = FUSE_ACCESS;
req->in.h.nodeid = get_node_id(inode);
- req->inode = inode;
req->in.numargs = 1;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
if ((mask & MAY_EXEC) && !S_ISDIR(mode) && !(mode & S_IXUGO))
return -EACCES;
- if (nd && (nd->flags & LOOKUP_ACCESS))
+ if (nd && (nd->flags & (LOOKUP_ACCESS | LOOKUP_CHDIR)))
return fuse_access(inode, mask);
return 0;
}
return 0;
}
-static inline size_t fuse_send_readdir(struct fuse_req *req, struct file *file,
- struct inode *inode, loff_t pos,
- size_t count)
-{
- return fuse_send_read_common(req, file, inode, pos, count, 1);
-}
-
static int fuse_readdir(struct file *file, void *dstbuf, filldir_t filldir)
{
int err;
if (is_bad_inode(inode))
return -EIO;
- req = fuse_get_request(fc);
- if (!req)
- return -EINTR;
+ req = fuse_get_req(fc);
+ if (IS_ERR(req))
+ return PTR_ERR(req);
page = alloc_page(GFP_KERNEL);
if (!page) {
}
req->num_pages = 1;
req->pages[0] = page;
- nbytes = fuse_send_readdir(req, file, inode, file->f_pos, PAGE_SIZE);
+ fuse_read_fill(req, file, inode, file->f_pos, PAGE_SIZE, FUSE_READDIR);
+ request_send(fc, req);
+ nbytes = req->out.args[0].size;
err = req->out.h.error;
fuse_put_request(fc, req);
if (!err)
{
struct inode *inode = dentry->d_inode;
struct fuse_conn *fc = get_fuse_conn(inode);
- struct fuse_req *req = fuse_get_request(fc);
+ struct fuse_req *req = fuse_get_req(fc);
char *link;
- if (!req)
- return ERR_PTR(-EINTR);
+ if (IS_ERR(req))
+ return ERR_PTR(PTR_ERR(req));
link = (char *) __get_free_page(GFP_KERNEL);
if (!link) {
}
req->in.h.opcode = FUSE_READLINK;
req->in.h.nodeid = get_node_id(inode);
- req->inode = inode;
req->out.argvar = 1;
req->out.numargs = 1;
req->out.args[0].size = PAGE_SIZE - 1;
}
}
+static void fuse_vmtruncate(struct inode *inode, loff_t offset)
+{
+ struct fuse_conn *fc = get_fuse_conn(inode);
+ int need_trunc;
+
+ spin_lock(&fc->lock);
+ need_trunc = inode->i_size > offset;
+ i_size_write(inode, offset);
+ spin_unlock(&fc->lock);
+
+ if (need_trunc) {
+ struct address_space *mapping = inode->i_mapping;
+ unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
+ truncate_inode_pages(mapping, offset);
+ }
+}
+
/*
* Set attributes, and at the same time refresh them.
*
* Truncation is slightly complicated, because the 'truncate' request
* may fail, in which case we don't want to touch the mapping.
- * vmtruncate() doesn't allow for this case. So do the rlimit
- * checking by hand and call vmtruncate() only after the file has
- * actually been truncated.
+ * vmtruncate() doesn't allow for this case, so do the rlimit checking
+ * and the actual truncation by hand.
*/
static int fuse_setattr(struct dentry *entry, struct iattr *attr)
{
}
}
- req = fuse_get_request(fc);
- if (!req)
- return -EINTR;
+ req = fuse_get_req(fc);
+ if (IS_ERR(req))
+ return PTR_ERR(req);
memset(&inarg, 0, sizeof(inarg));
iattr_to_fattr(attr, &inarg);
req->in.h.opcode = FUSE_SETATTR;
req->in.h.nodeid = get_node_id(inode);
- req->inode = inode;
req->in.numargs = 1;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
make_bad_inode(inode);
err = -EIO;
} else {
- if (is_truncate) {
- loff_t origsize = i_size_read(inode);
- i_size_write(inode, outarg.attr.size);
- if (origsize > outarg.attr.size)
- vmtruncate(inode, outarg.attr.size);
- }
+ if (is_truncate)
+ fuse_vmtruncate(inode, outarg.attr.size);
fuse_change_attributes(inode, &outarg.attr);
fi->i_time = time_to_jiffies(outarg.attr_valid,
outarg.attr_valid_nsec);
if (fc->no_setxattr)
return -EOPNOTSUPP;
- req = fuse_get_request(fc);
- if (!req)
- return -EINTR;
+ req = fuse_get_req(fc);
+ if (IS_ERR(req))
+ return PTR_ERR(req);
memset(&inarg, 0, sizeof(inarg));
inarg.size = size;
inarg.flags = flags;
req->in.h.opcode = FUSE_SETXATTR;
req->in.h.nodeid = get_node_id(inode);
- req->inode = inode;
req->in.numargs = 3;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
if (fc->no_getxattr)
return -EOPNOTSUPP;
- req = fuse_get_request(fc);
- if (!req)
- return -EINTR;
+ req = fuse_get_req(fc);
+ if (IS_ERR(req))
+ return PTR_ERR(req);
memset(&inarg, 0, sizeof(inarg));
inarg.size = size;
req->in.h.opcode = FUSE_GETXATTR;
req->in.h.nodeid = get_node_id(inode);
- req->inode = inode;
req->in.numargs = 2;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
if (fc->no_listxattr)
return -EOPNOTSUPP;
- req = fuse_get_request(fc);
- if (!req)
- return -EINTR;
+ req = fuse_get_req(fc);
+ if (IS_ERR(req))
+ return PTR_ERR(req);
memset(&inarg, 0, sizeof(inarg));
inarg.size = size;
req->in.h.opcode = FUSE_LISTXATTR;
req->in.h.nodeid = get_node_id(inode);
- req->inode = inode;
req->in.numargs = 1;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
if (fc->no_removexattr)
return -EOPNOTSUPP;
- req = fuse_get_request(fc);
- if (!req)
- return -EINTR;
+ req = fuse_get_req(fc);
+ if (IS_ERR(req))
+ return PTR_ERR(req);
req->in.h.opcode = FUSE_REMOVEXATTR;
req->in.h.nodeid = get_node_id(inode);
- req->inode = inode;
req->in.numargs = 1;
req->in.args[0].size = strlen(name) + 1;
req->in.args[0].value = name;
.removexattr = fuse_removexattr,
};
-static struct file_operations fuse_dir_operations = {
+static const struct file_operations fuse_dir_operations = {
.llseek = generic_file_llseek,
.read = generic_read_dir,
.readdir = fuse_readdir,
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff