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authorAlex Shi <alex.shi@linaro.org>2015-04-20 13:46:26 +0800
committerAlex Shi <alex.shi@linaro.org>2015-04-20 13:46:40 +0800
commit0033235024c1a7107179a2416b9b33fdb33ba4ba (patch)
tree7a708638af13efd03b7c573af4bdf9e4098ca371
parent667ea3959654ae48ef303df13f2635fd07766cb4 (diff)
parente03ae8b69bb899c5cdd0c594fa58a85cd180df1b (diff)
downloadlinux-linaro-stable-0033235024c1a7107179a2416b9b33fdb33ba4ba.tar.gz
Merge branch 'v3.14/topic/overlayfs' into linux-linaro-lsk-v3.14
To fix fuse compiling issues.
-rw-r--r--fs/fuse/dir.c165
-rw-r--r--fs/fuse/file.c101
-rw-r--r--fs/fuse/fuse_i.h12
-rw-r--r--fs/fuse/inode.c30
-rw-r--r--include/uapi/linux/fuse.h10
5 files changed, 256 insertions, 62 deletions
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index d53a7d91eb07..33dec83eccfb 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -680,6 +680,14 @@ static int fuse_symlink(struct inode *dir, struct dentry *entry,
return create_new_entry(fc, req, dir, entry, S_IFLNK);
}
+static inline void fuse_update_ctime(struct inode *inode)
+{
+ if (!IS_NOCMTIME(inode)) {
+ inode->i_ctime = current_fs_time(inode->i_sb);
+ mark_inode_dirty_sync(inode);
+ }
+}
+
static int fuse_unlink(struct inode *dir, struct dentry *entry)
{
int err;
@@ -714,6 +722,7 @@ static int fuse_unlink(struct inode *dir, struct dentry *entry)
fuse_invalidate_attr(inode);
fuse_invalidate_attr(dir);
fuse_invalidate_entry_cache(entry);
+ fuse_update_ctime(inode);
} else if (err == -EINTR)
fuse_invalidate_entry(entry);
return err;
@@ -744,23 +753,26 @@ static int fuse_rmdir(struct inode *dir, struct dentry *entry)
return err;
}
-static int fuse_rename(struct inode *olddir, struct dentry *oldent,
- struct inode *newdir, struct dentry *newent)
+static int fuse_rename_common(struct inode *olddir, struct dentry *oldent,
+ struct inode *newdir, struct dentry *newent,
+ unsigned int flags, int opcode, size_t argsize)
{
int err;
- struct fuse_rename_in inarg;
+ struct fuse_rename2_in inarg;
struct fuse_conn *fc = get_fuse_conn(olddir);
- struct fuse_req *req = fuse_get_req_nopages(fc);
+ struct fuse_req *req;
+ req = fuse_get_req_nopages(fc);
if (IS_ERR(req))
return PTR_ERR(req);
- memset(&inarg, 0, sizeof(inarg));
+ memset(&inarg, 0, argsize);
inarg.newdir = get_node_id(newdir);
- req->in.h.opcode = FUSE_RENAME;
+ inarg.flags = flags;
+ req->in.h.opcode = opcode;
req->in.h.nodeid = get_node_id(olddir);
req->in.numargs = 3;
- req->in.args[0].size = sizeof(inarg);
+ req->in.args[0].size = argsize;
req->in.args[0].value = &inarg;
req->in.args[1].size = oldent->d_name.len + 1;
req->in.args[1].value = oldent->d_name.name;
@@ -772,15 +784,22 @@ static int fuse_rename(struct inode *olddir, struct dentry *oldent,
if (!err) {
/* ctime changes */
fuse_invalidate_attr(oldent->d_inode);
+ fuse_update_ctime(oldent->d_inode);
+
+ if (flags & RENAME_EXCHANGE) {
+ fuse_invalidate_attr(newent->d_inode);
+ fuse_update_ctime(newent->d_inode);
+ }
fuse_invalidate_attr(olddir);
if (olddir != newdir)
fuse_invalidate_attr(newdir);
/* newent will end up negative */
- if (newent->d_inode) {
+ if (!(flags & RENAME_EXCHANGE) && newent->d_inode) {
fuse_invalidate_attr(newent->d_inode);
fuse_invalidate_entry_cache(newent);
+ fuse_update_ctime(newent->d_inode);
}
} else if (err == -EINTR) {
/* If request was interrupted, DEITY only knows if the
@@ -860,6 +879,7 @@ static int fuse_link(struct dentry *entry, struct inode *newdir,
inc_nlink(inode);
spin_unlock(&fc->lock);
fuse_invalidate_attr(inode);
+ fuse_update_ctime(inode);
} else if (err == -EINTR) {
fuse_invalidate_attr(inode);
}
@@ -870,6 +890,16 @@ static void fuse_fillattr(struct inode *inode, struct fuse_attr *attr,
struct kstat *stat)
{
unsigned int blkbits;
+ struct fuse_conn *fc = get_fuse_conn(inode);
+
+ /* see the comment in fuse_change_attributes() */
+ if (fc->writeback_cache && S_ISREG(inode->i_mode)) {
+ attr->size = i_size_read(inode);
+ attr->mtime = inode->i_mtime.tv_sec;
+ attr->mtimensec = inode->i_mtime.tv_nsec;
+ attr->ctime = inode->i_ctime.tv_sec;
+ attr->ctimensec = inode->i_ctime.tv_nsec;
+ }
stat->dev = inode->i_sb->s_dev;
stat->ino = attr->ino;
@@ -1508,12 +1538,16 @@ static long fuse_dir_compat_ioctl(struct file *file, unsigned int cmd,
FUSE_IOCTL_COMPAT | FUSE_IOCTL_DIR);
}
-static bool update_mtime(unsigned ivalid)
+static bool update_mtime(unsigned ivalid, bool trust_local_mtime)
{
/* Always update if mtime is explicitly set */
if (ivalid & ATTR_MTIME_SET)
return true;
+ /* Or if kernel i_mtime is the official one */
+ if (trust_local_mtime)
+ return true;
+
/* If it's an open(O_TRUNC) or an ftruncate(), don't update */
if ((ivalid & ATTR_SIZE) && (ivalid & (ATTR_OPEN | ATTR_FILE)))
return false;
@@ -1522,7 +1556,8 @@ static bool update_mtime(unsigned ivalid)
return true;
}
-static void iattr_to_fattr(struct iattr *iattr, struct fuse_setattr_in *arg)
+static void iattr_to_fattr(struct iattr *iattr, struct fuse_setattr_in *arg,
+ bool trust_local_mtime)
{
unsigned ivalid = iattr->ia_valid;
@@ -1541,11 +1576,11 @@ static void iattr_to_fattr(struct iattr *iattr, struct fuse_setattr_in *arg)
if (!(ivalid & ATTR_ATIME_SET))
arg->valid |= FATTR_ATIME_NOW;
}
- if ((ivalid & ATTR_MTIME) && update_mtime(ivalid)) {
+ if ((ivalid & ATTR_MTIME) && update_mtime(ivalid, trust_local_mtime)) {
arg->valid |= FATTR_MTIME;
arg->mtime = iattr->ia_mtime.tv_sec;
arg->mtimensec = iattr->ia_mtime.tv_nsec;
- if (!(ivalid & ATTR_MTIME_SET))
+ if (!(ivalid & ATTR_MTIME_SET) && !trust_local_mtime)
arg->valid |= FATTR_MTIME_NOW;
}
}
@@ -1594,6 +1629,63 @@ void fuse_release_nowrite(struct inode *inode)
spin_unlock(&fc->lock);
}
+static void fuse_setattr_fill(struct fuse_conn *fc, struct fuse_req *req,
+ struct inode *inode,
+ struct fuse_setattr_in *inarg_p,
+ struct fuse_attr_out *outarg_p)
+{
+ req->in.h.opcode = FUSE_SETATTR;
+ req->in.h.nodeid = get_node_id(inode);
+ req->in.numargs = 1;
+ req->in.args[0].size = sizeof(*inarg_p);
+ req->in.args[0].value = inarg_p;
+ req->out.numargs = 1;
+ if (fc->minor < 9)
+ req->out.args[0].size = FUSE_COMPAT_ATTR_OUT_SIZE;
+ else
+ req->out.args[0].size = sizeof(*outarg_p);
+ req->out.args[0].value = outarg_p;
+}
+
+/*
+ * Flush inode->i_mtime to the server
+ */
+int fuse_flush_mtime(struct file *file, bool nofail)
+{
+ struct inode *inode = file->f_mapping->host;
+ struct fuse_inode *fi = get_fuse_inode(inode);
+ struct fuse_conn *fc = get_fuse_conn(inode);
+ struct fuse_req *req = NULL;
+ struct fuse_setattr_in inarg;
+ struct fuse_attr_out outarg;
+ int err;
+
+ if (nofail) {
+ req = fuse_get_req_nofail_nopages(fc, file);
+ } else {
+ req = fuse_get_req_nopages(fc);
+ if (IS_ERR(req))
+ return PTR_ERR(req);
+ }
+
+ memset(&inarg, 0, sizeof(inarg));
+ memset(&outarg, 0, sizeof(outarg));
+
+ inarg.valid |= FATTR_MTIME;
+ inarg.mtime = inode->i_mtime.tv_sec;
+ inarg.mtimensec = inode->i_mtime.tv_nsec;
+
+ fuse_setattr_fill(fc, req, inode, &inarg, &outarg);
+ fuse_request_send(fc, req);
+ err = req->out.h.error;
+ fuse_put_request(fc, req);
+
+ if (!err)
+ clear_bit(FUSE_I_MTIME_DIRTY, &fi->state);
+
+ return err;
+}
+
/*
* Set attributes, and at the same time refresh them.
*
@@ -1611,8 +1703,10 @@ int fuse_do_setattr(struct inode *inode, struct iattr *attr,
struct fuse_setattr_in inarg;
struct fuse_attr_out outarg;
bool is_truncate = false;
+ bool is_wb = fc->writeback_cache;
loff_t oldsize;
int err;
+ bool trust_local_mtime = is_wb && S_ISREG(inode->i_mode);
if (!(fc->flags & FUSE_DEFAULT_PERMISSIONS))
attr->ia_valid |= ATTR_FORCE;
@@ -1641,7 +1735,7 @@ int fuse_do_setattr(struct inode *inode, struct iattr *attr,
memset(&inarg, 0, sizeof(inarg));
memset(&outarg, 0, sizeof(outarg));
- iattr_to_fattr(attr, &inarg);
+ iattr_to_fattr(attr, &inarg, trust_local_mtime);
if (file) {
struct fuse_file *ff = file->private_data;
inarg.valid |= FATTR_FH;
@@ -1652,17 +1746,7 @@ int fuse_do_setattr(struct inode *inode, struct iattr *attr,
inarg.valid |= FATTR_LOCKOWNER;
inarg.lock_owner = fuse_lock_owner_id(fc, current->files);
}
- req->in.h.opcode = FUSE_SETATTR;
- req->in.h.nodeid = get_node_id(inode);
- req->in.numargs = 1;
- req->in.args[0].size = sizeof(inarg);
- req->in.args[0].value = &inarg;
- req->out.numargs = 1;
- if (fc->minor < 9)
- req->out.args[0].size = FUSE_COMPAT_ATTR_OUT_SIZE;
- else
- req->out.args[0].size = sizeof(outarg);
- req->out.args[0].value = &outarg;
+ fuse_setattr_fill(fc, req, inode, &inarg, &outarg);
fuse_request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
@@ -1679,10 +1763,18 @@ int fuse_do_setattr(struct inode *inode, struct iattr *attr,
}
spin_lock(&fc->lock);
+ /* the kernel maintains i_mtime locally */
+ if (trust_local_mtime && (attr->ia_valid & ATTR_MTIME)) {
+ inode->i_mtime = attr->ia_mtime;
+ clear_bit(FUSE_I_MTIME_DIRTY, &fi->state);
+ }
+
fuse_change_attributes_common(inode, &outarg.attr,
attr_timeout(&outarg));
oldsize = inode->i_size;
- i_size_write(inode, outarg.attr.size);
+ /* see the comment in fuse_change_attributes() */
+ if (!is_wb || is_truncate || !S_ISREG(inode->i_mode))
+ i_size_write(inode, outarg.attr.size);
if (is_truncate) {
/* NOTE: this may release/reacquire fc->lock */
@@ -1694,7 +1786,8 @@ int fuse_do_setattr(struct inode *inode, struct iattr *attr,
* Only call invalidate_inode_pages2() after removing
* FUSE_NOWRITE, otherwise fuse_launder_page() would deadlock.
*/
- if (S_ISREG(inode->i_mode) && oldsize != outarg.attr.size) {
+ if ((is_truncate || !is_wb) &&
+ S_ISREG(inode->i_mode) && oldsize != outarg.attr.size) {
truncate_pagecache(inode, outarg.attr.size);
invalidate_inode_pages2(inode->i_mapping);
}
@@ -1770,8 +1863,10 @@ static int fuse_setxattr(struct dentry *entry, const char *name,
fc->no_setxattr = 1;
err = -EOPNOTSUPP;
}
- if (!err)
+ if (!err) {
fuse_invalidate_attr(inode);
+ fuse_update_ctime(inode);
+ }
return err;
}
@@ -1901,11 +1996,24 @@ static int fuse_removexattr(struct dentry *entry, const char *name)
fc->no_removexattr = 1;
err = -EOPNOTSUPP;
}
- if (!err)
+ if (!err) {
fuse_invalidate_attr(inode);
+ fuse_update_ctime(inode);
+ }
return err;
}
+static int fuse_update_time(struct inode *inode, struct timespec *now,
+ int flags)
+{
+ if (flags & S_MTIME) {
+ inode->i_mtime = *now;
+ set_bit(FUSE_I_MTIME_DIRTY, &get_fuse_inode(inode)->state);
+ BUG_ON(!S_ISREG(inode->i_mode));
+ }
+ return 0;
+}
+
static const struct inode_operations fuse_dir_inode_operations = {
.lookup = fuse_lookup,
.mkdir = fuse_mkdir,
@@ -1945,6 +2053,7 @@ static const struct inode_operations fuse_common_inode_operations = {
.getxattr = fuse_getxattr,
.listxattr = fuse_listxattr,
.removexattr = fuse_removexattr,
+ .update_time = fuse_update_time,
};
static const struct inode_operations fuse_symlink_inode_operations = {
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index d8a60270581c..5916dc51599b 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -188,6 +188,22 @@ int fuse_do_open(struct fuse_conn *fc, u64 nodeid, struct file *file,
}
EXPORT_SYMBOL_GPL(fuse_do_open);
+static void fuse_link_write_file(struct file *file)
+{
+ struct inode *inode = file_inode(file);
+ struct fuse_conn *fc = get_fuse_conn(inode);
+ struct fuse_inode *fi = get_fuse_inode(inode);
+ struct fuse_file *ff = file->private_data;
+ /*
+ * file may be written through mmap, so chain it onto the
+ * inodes's write_file list
+ */
+ spin_lock(&fc->lock);
+ if (list_empty(&ff->write_entry))
+ list_add(&ff->write_entry, &fi->write_files);
+ spin_unlock(&fc->lock);
+}
+
void fuse_finish_open(struct inode *inode, struct file *file)
{
struct fuse_file *ff = file->private_data;
@@ -292,6 +308,9 @@ static int fuse_open(struct inode *inode, struct file *file)
static int fuse_release(struct inode *inode, struct file *file)
{
+ if (test_bit(FUSE_I_MTIME_DIRTY, &get_fuse_inode(inode)->state))
+ fuse_flush_mtime(file, true);
+
fuse_release_common(file, FUSE_RELEASE);
/* return value is ignored by VFS */
@@ -459,6 +478,12 @@ int fuse_fsync_common(struct file *file, loff_t start, loff_t end,
fuse_sync_writes(inode);
+ if (test_bit(FUSE_I_MTIME_DIRTY, &get_fuse_inode(inode)->state)) {
+ int err = fuse_flush_mtime(file, false);
+ if (err)
+ goto out;
+ }
+
req = fuse_get_req_nopages(fc);
if (IS_ERR(req)) {
err = PTR_ERR(req);
@@ -655,6 +680,32 @@ static void fuse_read_update_size(struct inode *inode, loff_t size,
spin_unlock(&fc->lock);
}
+static void fuse_short_read(struct fuse_req *req, struct inode *inode,
+ u64 attr_ver)
+{
+ size_t num_read = req->out.args[0].size;
+ struct fuse_conn *fc = get_fuse_conn(inode);
+
+ if (fc->writeback_cache) {
+ /*
+ * A hole in a file. Some data after the hole are in page cache,
+ * but have not reached the client fs yet. So, the hole is not
+ * present there.
+ */
+ int i;
+ int start_idx = num_read >> PAGE_CACHE_SHIFT;
+ size_t off = num_read & (PAGE_CACHE_SIZE - 1);
+
+ for (i = start_idx; i < req->num_pages; i++) {
+ zero_user_segment(req->pages[i], off, PAGE_CACHE_SIZE);
+ off = 0;
+ }
+ } else {
+ loff_t pos = page_offset(req->pages[0]) + num_read;
+ fuse_read_update_size(inode, pos, attr_ver);
+ }
+}
+
static int fuse_readpage(struct file *file, struct page *page)
{
struct fuse_io_priv io = { .async = 0, .file = file };
@@ -692,18 +743,18 @@ static int fuse_readpage(struct file *file, struct page *page)
req->page_descs[0].length = count;
num_read = fuse_send_read(req, &io, pos, count, NULL);
err = req->out.h.error;
- fuse_put_request(fc, req);
if (!err) {
/*
* Short read means EOF. If file size is larger, truncate it
*/
if (num_read < count)
- fuse_read_update_size(inode, pos + num_read, attr_ver);
+ fuse_short_read(req, inode, attr_ver);
SetPageUptodate(page);
}
+ fuse_put_request(fc, req);
fuse_invalidate_atime(inode);
out:
unlock_page(page);
@@ -726,13 +777,9 @@ static void fuse_readpages_end(struct fuse_conn *fc, struct fuse_req *req)
/*
* Short read means EOF. If file size is larger, truncate it
*/
- if (!req->out.h.error && num_read < count) {
- loff_t pos;
+ if (!req->out.h.error && num_read < count)
+ fuse_short_read(req, inode, req->misc.read.attr_ver);
- pos = page_offset(req->pages[0]) + num_read;
- fuse_read_update_size(inode, pos,
- req->misc.read.attr_ver);
- }
fuse_invalidate_atime(inode);
}
@@ -922,16 +969,21 @@ static size_t fuse_send_write(struct fuse_req *req, struct fuse_io_priv *io,
return req->misc.write.out.size;
}
-void fuse_write_update_size(struct inode *inode, loff_t pos)
+bool fuse_write_update_size(struct inode *inode, loff_t pos)
{
struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_inode *fi = get_fuse_inode(inode);
+ bool ret = false;
spin_lock(&fc->lock);
fi->attr_version = ++fc->attr_version;
- if (pos > inode->i_size)
+ if (pos > inode->i_size) {
i_size_write(inode, pos);
+ ret = true;
+ }
spin_unlock(&fc->lock);
+
+ return ret;
}
static size_t fuse_send_write_pages(struct fuse_req *req, struct file *file,
@@ -1942,20 +1994,9 @@ static const struct vm_operations_struct fuse_file_vm_ops = {
static int fuse_file_mmap(struct file *file, struct vm_area_struct *vma)
{
- if ((vma->vm_flags & VM_SHARED) && (vma->vm_flags & VM_MAYWRITE)) {
- struct inode *inode = file_inode(file);
- struct fuse_conn *fc = get_fuse_conn(inode);
- struct fuse_inode *fi = get_fuse_inode(inode);
- struct fuse_file *ff = file->private_data;
- /*
- * file may be written through mmap, so chain it onto the
- * inodes's write_file list
- */
- spin_lock(&fc->lock);
- if (list_empty(&ff->write_entry))
- list_add(&ff->write_entry, &fi->write_files);
- spin_unlock(&fc->lock);
- }
+ if ((vma->vm_flags & VM_SHARED) && (vma->vm_flags & VM_MAYWRITE))
+ fuse_link_write_file(file);
+
file_accessed(file);
vma->vm_ops = &fuse_file_vm_ops;
return 0;
@@ -2846,8 +2887,16 @@ static long fuse_file_fallocate(struct file *file, int mode, loff_t offset,
goto out;
/* we could have extended the file */
- if (!(mode & FALLOC_FL_KEEP_SIZE))
- fuse_write_update_size(inode, offset + length);
+ if (!(mode & FALLOC_FL_KEEP_SIZE)) {
+ bool changed = fuse_write_update_size(inode, offset + length);
+
+ if (changed && fc->writeback_cache) {
+ struct fuse_inode *fi = get_fuse_inode(inode);
+
+ inode->i_mtime = current_fs_time(inode->i_sb);
+ set_bit(FUSE_I_MTIME_DIRTY, &fi->state);
+ }
+ }
if (mode & FALLOC_FL_PUNCH_HOLE)
truncate_pagecache_range(inode, offset, offset + length - 1);
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index 2da5db2c8bdb..7cc58c976780 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -119,6 +119,8 @@ enum {
FUSE_I_INIT_RDPLUS,
/** An operation changing file size is in progress */
FUSE_I_SIZE_UNSTABLE,
+ /** i_mtime has been updated locally; a flush to userspace needed */
+ FUSE_I_MTIME_DIRTY,
};
struct fuse_conn;
@@ -480,6 +482,9 @@ struct fuse_conn {
/** Set if bdi is valid */
unsigned bdi_initialized:1;
+ /** write-back cache policy (default is write-through) */
+ unsigned writeback_cache:1;
+
/*
* The following bitfields are only for optimization purposes
* and hence races in setting them will not cause malfunction
@@ -539,6 +544,9 @@ struct fuse_conn {
/** Is fallocate not implemented by fs? */
unsigned no_fallocate:1;
+ /** Is rename with flags implemented by fs? */
+ unsigned no_rename2:1;
+
/** Use enhanced/automatic page cache invalidation. */
unsigned auto_inval_data:1;
@@ -873,7 +881,9 @@ long fuse_ioctl_common(struct file *file, unsigned int cmd,
unsigned fuse_file_poll(struct file *file, poll_table *wait);
int fuse_dev_release(struct inode *inode, struct file *file);
-void fuse_write_update_size(struct inode *inode, loff_t pos);
+bool fuse_write_update_size(struct inode *inode, loff_t pos);
+
+int fuse_flush_mtime(struct file *file, bool nofail);
int fuse_do_setattr(struct inode *inode, struct iattr *attr,
struct file *file);
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 73f6bcb44ea8..8fe0b485908c 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -170,10 +170,13 @@ void fuse_change_attributes_common(struct inode *inode, struct fuse_attr *attr,
inode->i_blocks = attr->blocks;
inode->i_atime.tv_sec = attr->atime;
inode->i_atime.tv_nsec = attr->atimensec;
- inode->i_mtime.tv_sec = attr->mtime;
- inode->i_mtime.tv_nsec = attr->mtimensec;
- inode->i_ctime.tv_sec = attr->ctime;
- inode->i_ctime.tv_nsec = attr->ctimensec;
+ /* mtime from server may be stale due to local buffered write */
+ if (!fc->writeback_cache || !S_ISREG(inode->i_mode)) {
+ inode->i_mtime.tv_sec = attr->mtime;
+ inode->i_mtime.tv_nsec = attr->mtimensec;
+ inode->i_ctime.tv_sec = attr->ctime;
+ inode->i_ctime.tv_nsec = attr->ctimensec;
+ }
if (attr->blksize != 0)
inode->i_blkbits = ilog2(attr->blksize);
@@ -197,6 +200,7 @@ void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr,
{
struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_inode *fi = get_fuse_inode(inode);
+ bool is_wb = fc->writeback_cache;
loff_t oldsize;
struct timespec old_mtime;
@@ -211,10 +215,16 @@ void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr,
fuse_change_attributes_common(inode, attr, attr_valid);
oldsize = inode->i_size;
- i_size_write(inode, attr->size);
+ /*
+ * In case of writeback_cache enabled, the cached writes beyond EOF
+ * extend local i_size without keeping userspace server in sync. So,
+ * attr->size coming from server can be stale. We cannot trust it.
+ */
+ if (!is_wb || !S_ISREG(inode->i_mode))
+ i_size_write(inode, attr->size);
spin_unlock(&fc->lock);
- if (S_ISREG(inode->i_mode)) {
+ if (!is_wb && S_ISREG(inode->i_mode)) {
bool inval = false;
if (oldsize != attr->size) {
@@ -243,6 +253,10 @@ static void fuse_init_inode(struct inode *inode, struct fuse_attr *attr)
{
inode->i_mode = attr->mode & S_IFMT;
inode->i_size = attr->size;
+ inode->i_mtime.tv_sec = attr->mtime;
+ inode->i_mtime.tv_nsec = attr->mtimensec;
+ inode->i_ctime.tv_sec = attr->ctime;
+ inode->i_ctime.tv_nsec = attr->ctimensec;
if (S_ISREG(inode->i_mode)) {
fuse_init_common(inode);
fuse_init_file_inode(inode);
@@ -289,7 +303,9 @@ struct inode *fuse_iget(struct super_block *sb, u64 nodeid,
return NULL;
if ((inode->i_state & I_NEW)) {
- inode->i_flags |= S_NOATIME|S_NOCMTIME;
+ inode->i_flags |= S_NOATIME;
+ if (!fc->writeback_cache || !S_ISREG(inode->i_mode))
+ inode->i_flags |= S_NOCMTIME;
inode->i_generation = generation;
inode->i_data.backing_dev_info = &fc->bdi;
fuse_init_inode(inode, attr);
diff --git a/include/uapi/linux/fuse.h b/include/uapi/linux/fuse.h
index 60bb2f9f7b74..b77cf381a44b 100644
--- a/include/uapi/linux/fuse.h
+++ b/include/uapi/linux/fuse.h
@@ -93,6 +93,9 @@
*
* 7.22
* - add FUSE_ASYNC_DIO
+ *
+ * 7.23
+ * - add FUSE_RENAME2 request
*/
#ifndef _LINUX_FUSE_H
@@ -343,6 +346,7 @@ enum fuse_opcode {
FUSE_BATCH_FORGET = 42,
FUSE_FALLOCATE = 43,
FUSE_READDIRPLUS = 44,
+ FUSE_RENAME2 = 45,
/* CUSE specific operations */
CUSE_INIT = 4096,
@@ -421,6 +425,12 @@ struct fuse_rename_in {
uint64_t newdir;
};
+struct fuse_rename2_in {
+ uint64_t newdir;
+ uint32_t flags;
+ uint32_t padding;
+};
+
struct fuse_link_in {
uint64_t oldnodeid;
};