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Diffstat (limited to 'fs/hostfs/hostfs_kern.c')
-rw-r--r--fs/hostfs/hostfs_kern.c192
1 files changed, 98 insertions, 94 deletions
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index fd301a91012..8286491dbf3 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*
* Ported the filesystem routines to 2.5.
@@ -31,14 +31,14 @@ struct hostfs_inode_info {
static inline struct hostfs_inode_info *HOSTFS_I(struct inode *inode)
{
- return(list_entry(inode, struct hostfs_inode_info, vfs_inode));
+ return list_entry(inode, struct hostfs_inode_info, vfs_inode);
}
#define FILE_HOSTFS_I(file) HOSTFS_I((file)->f_path.dentry->d_inode)
int hostfs_d_delete(struct dentry *dentry)
{
- return(1);
+ return 1;
}
struct dentry_operations hostfs_dentry_ops = {
@@ -79,7 +79,7 @@ static int __init hostfs_args(char *options, int *add)
}
options = ptr;
}
- return(0);
+ return 0;
}
__uml_setup("hostfs=", hostfs_args,
@@ -110,7 +110,8 @@ static char *dentry_name(struct dentry *dentry, int extra)
root = HOSTFS_I(parent->d_inode)->host_filename;
len += strlen(root);
name = kmalloc(len + extra + 1, GFP_KERNEL);
- if(name == NULL) return(NULL);
+ if(name == NULL)
+ return NULL;
name[len] = '\0';
parent = dentry;
@@ -122,7 +123,7 @@ static char *dentry_name(struct dentry *dentry, int extra)
parent = parent->d_parent;
}
strncpy(name, root, strlen(root));
- return(name);
+ return name;
}
static char *inode_name(struct inode *ino, int extra)
@@ -130,7 +131,7 @@ static char *inode_name(struct inode *ino, int extra)
struct dentry *dentry;
dentry = list_entry(ino->i_dentry.next, struct dentry, d_alias);
- return(dentry_name(dentry, extra));
+ return dentry_name(dentry, extra);
}
static int read_name(struct inode *ino, char *name)
@@ -147,16 +148,16 @@ static int read_name(struct inode *ino, char *name)
err = stat_file(name, &i_ino, &i_mode, &i_nlink, &ino->i_uid,
&ino->i_gid, &i_size, &ino->i_atime, &ino->i_mtime,
- &ino->i_ctime, &i_blksize, &i_blocks);
+ &ino->i_ctime, &i_blksize, &i_blocks, -1);
if(err)
- return(err);
+ return err;
ino->i_ino = i_ino;
ino->i_mode = i_mode;
ino->i_nlink = i_nlink;
ino->i_size = i_size;
ino->i_blocks = i_blocks;
- return(0);
+ return 0;
}
static char *follow_link(char *link)
@@ -181,11 +182,11 @@ static char *follow_link(char *link)
goto out_free;
if(*name == '/')
- return(name);
+ return name;
end = strrchr(link, '/');
if(end == NULL)
- return(name);
+ return name;
*(end + 1) = '\0';
len = strlen(link) + strlen(name) + 1;
@@ -199,12 +200,12 @@ static char *follow_link(char *link)
sprintf(resolved, "%s%s", link, name);
kfree(name);
kfree(link);
- return(resolved);
+ return resolved;
out_free:
kfree(name);
out:
- return(ERR_PTR(n));
+ return ERR_PTR(n);
}
static int read_inode(struct inode *ino)
@@ -234,7 +235,7 @@ static int read_inode(struct inode *ino)
err = read_name(ino, name);
kfree(name);
out:
- return(err);
+ return err;
}
int hostfs_statfs(struct dentry *dentry, struct kstatfs *sf)
@@ -254,14 +255,15 @@ int hostfs_statfs(struct dentry *dentry, struct kstatfs *sf)
&sf->f_bsize, &f_blocks, &f_bfree, &f_bavail, &f_files,
&f_ffree, &sf->f_fsid, sizeof(sf->f_fsid),
&sf->f_namelen, sf->f_spare);
- if(err) return(err);
+ if(err)
+ return err;
sf->f_blocks = f_blocks;
sf->f_bfree = f_bfree;
sf->f_bavail = f_bavail;
sf->f_files = f_files;
sf->f_ffree = f_ffree;
sf->f_type = HOSTFS_SUPER_MAGIC;
- return(0);
+ return 0;
}
static struct inode *hostfs_alloc_inode(struct super_block *sb)
@@ -270,13 +272,13 @@ static struct inode *hostfs_alloc_inode(struct super_block *sb)
hi = kmalloc(sizeof(*hi), GFP_KERNEL);
if(hi == NULL)
- return(NULL);
+ return NULL;
*hi = ((struct hostfs_inode_info) { .host_filename = NULL,
.fd = -1,
.mode = 0 });
inode_init_once(&hi->vfs_inode);
- return(&hi->vfs_inode);
+ return &hi->vfs_inode;
}
static void hostfs_delete_inode(struct inode *inode)
@@ -325,10 +327,12 @@ int hostfs_readdir(struct file *file, void *ent, filldir_t filldir)
int error, len;
name = dentry_name(file->f_path.dentry, 0);
- if(name == NULL) return(-ENOMEM);
+ if(name == NULL)
+ return -ENOMEM;
dir = open_dir(name, &error);
kfree(name);
- if(dir == NULL) return(-error);
+ if(dir == NULL)
+ return -error;
next = file->f_pos;
while((name = read_dir(dir, &next, &ino, &len)) != NULL){
error = (*filldir)(ent, name, len, file->f_pos,
@@ -337,7 +341,7 @@ int hostfs_readdir(struct file *file, void *ent, filldir_t filldir)
file->f_pos = next;
}
close_dir(dir);
- return(0);
+ return 0;
}
int hostfs_file_open(struct inode *ino, struct file *file)
@@ -347,7 +351,7 @@ int hostfs_file_open(struct inode *ino, struct file *file)
mode = file->f_mode & (FMODE_READ | FMODE_WRITE);
if((mode & HOSTFS_I(ino)->mode) == mode)
- return(0);
+ return 0;
/* The file may already have been opened, but with the wrong access,
* so this resets things and reopens the file with the new access.
@@ -367,14 +371,15 @@ int hostfs_file_open(struct inode *ino, struct file *file)
name = dentry_name(file->f_path.dentry, 0);
if(name == NULL)
- return(-ENOMEM);
+ return -ENOMEM;
fd = open_file(name, r, w, append);
kfree(name);
- if(fd < 0) return(fd);
+ if(fd < 0)
+ return fd;
FILE_HOSTFS_I(file)->fd = fd;
- return(0);
+ return 0;
}
int hostfs_fsync(struct file *file, struct dentry *dentry, int datasync)
@@ -458,7 +463,7 @@ int hostfs_readpage(struct file *file, struct page *page)
out:
kunmap(page);
unlock_page(page);
- return(err);
+ return err;
}
int hostfs_prepare_write(struct file *file, struct page *page,
@@ -485,7 +490,7 @@ int hostfs_prepare_write(struct file *file, struct page *page,
err = 0;
out:
kunmap(page);
- return(err);
+ return err;
}
int hostfs_commit_write(struct file *file, struct page *page, unsigned from,
@@ -511,7 +516,7 @@ int hostfs_commit_write(struct file *file, struct page *page, unsigned from,
inode->i_size = start;
kunmap(page);
- return(err);
+ return err;
}
static const struct address_space_operations hostfs_aops = {
@@ -569,7 +574,7 @@ static int init_inode(struct inode *inode, struct dentry *dentry)
break;
}
out:
- return(err);
+ return err;
}
int hostfs_create(struct inode *dir, struct dentry *dentry, int mode,
@@ -607,16 +612,16 @@ int hostfs_create(struct inode *dir, struct dentry *dentry, int mode,
HOSTFS_I(inode)->fd = fd;
HOSTFS_I(inode)->mode = FMODE_READ | FMODE_WRITE;
d_instantiate(dentry, inode);
- return(0);
+ return 0;
out_put:
iput(inode);
out:
- return(error);
+ return error;
}
struct dentry *hostfs_lookup(struct inode *ino, struct dentry *dentry,
- struct nameidata *nd)
+ struct nameidata *nd)
{
struct inode *inode;
char *name;
@@ -647,44 +652,45 @@ struct dentry *hostfs_lookup(struct inode *ino, struct dentry *dentry,
d_add(dentry, inode);
dentry->d_op = &hostfs_dentry_ops;
- return(NULL);
+ return NULL;
out_put:
iput(inode);
out:
- return(ERR_PTR(err));
+ return ERR_PTR(err);
}
static char *inode_dentry_name(struct inode *ino, struct dentry *dentry)
{
- char *file;
+ char *file;
int len;
file = inode_name(ino, dentry->d_name.len + 1);
- if(file == NULL) return(NULL);
- strcat(file, "/");
+ if(file == NULL)
+ return NULL;
+ strcat(file, "/");
len = strlen(file);
- strncat(file, dentry->d_name.name, dentry->d_name.len);
+ strncat(file, dentry->d_name.name, dentry->d_name.len);
file[len + dentry->d_name.len] = '\0';
- return(file);
+ return file;
}
int hostfs_link(struct dentry *to, struct inode *ino, struct dentry *from)
{
- char *from_name, *to_name;
- int err;
+ char *from_name, *to_name;
+ int err;
- if((from_name = inode_dentry_name(ino, from)) == NULL)
- return(-ENOMEM);
- to_name = dentry_name(to, 0);
+ if((from_name = inode_dentry_name(ino, from)) == NULL)
+ return -ENOMEM;
+ to_name = dentry_name(to, 0);
if(to_name == NULL){
kfree(from_name);
- return(-ENOMEM);
+ return -ENOMEM;
}
- err = link_file(to_name, from_name);
- kfree(from_name);
- kfree(to_name);
- return(err);
+ err = link_file(to_name, from_name);
+ kfree(from_name);
+ kfree(to_name);
+ return err;
}
int hostfs_unlink(struct inode *ino, struct dentry *dentry)
@@ -692,13 +698,14 @@ int hostfs_unlink(struct inode *ino, struct dentry *dentry)
char *file;
int err;
- if((file = inode_dentry_name(ino, dentry)) == NULL) return(-ENOMEM);
+ if((file = inode_dentry_name(ino, dentry)) == NULL)
+ return -ENOMEM;
if(append)
- return(-EPERM);
+ return -EPERM;
err = unlink_file(file);
kfree(file);
- return(err);
+ return err;
}
int hostfs_symlink(struct inode *ino, struct dentry *dentry, const char *to)
@@ -706,10 +713,11 @@ int hostfs_symlink(struct inode *ino, struct dentry *dentry, const char *to)
char *file;
int err;
- if((file = inode_dentry_name(ino, dentry)) == NULL) return(-ENOMEM);
+ if((file = inode_dentry_name(ino, dentry)) == NULL)
+ return -ENOMEM;
err = make_symlink(file, to);
kfree(file);
- return(err);
+ return err;
}
int hostfs_mkdir(struct inode *ino, struct dentry *dentry, int mode)
@@ -717,10 +725,11 @@ int hostfs_mkdir(struct inode *ino, struct dentry *dentry, int mode)
char *file;
int err;
- if((file = inode_dentry_name(ino, dentry)) == NULL) return(-ENOMEM);
+ if((file = inode_dentry_name(ino, dentry)) == NULL)
+ return -ENOMEM;
err = do_mkdir(file, mode);
kfree(file);
- return(err);
+ return err;
}
int hostfs_rmdir(struct inode *ino, struct dentry *dentry)
@@ -728,10 +737,11 @@ int hostfs_rmdir(struct inode *ino, struct dentry *dentry)
char *file;
int err;
- if((file = inode_dentry_name(ino, dentry)) == NULL) return(-ENOMEM);
+ if((file = inode_dentry_name(ino, dentry)) == NULL)
+ return -ENOMEM;
err = do_rmdir(file);
kfree(file);
- return(err);
+ return err;
}
int hostfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
@@ -764,14 +774,14 @@ int hostfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
goto out_put;
d_instantiate(dentry, inode);
- return(0);
+ return 0;
out_free:
kfree(name);
out_put:
iput(inode);
out:
- return(err);
+ return err;
}
int hostfs_rename(struct inode *from_ino, struct dentry *from,
@@ -781,15 +791,15 @@ int hostfs_rename(struct inode *from_ino, struct dentry *from,
int err;
if((from_name = inode_dentry_name(from_ino, from)) == NULL)
- return(-ENOMEM);
+ return -ENOMEM;
if((to_name = inode_dentry_name(to_ino, to)) == NULL){
kfree(from_name);
- return(-ENOMEM);
+ return -ENOMEM;
}
err = rename_file(from_name, to_name);
kfree(from_name);
kfree(to_name);
- return(err);
+ return err;
}
int hostfs_permission(struct inode *ino, int desired, struct nameidata *nd)
@@ -801,7 +811,8 @@ int hostfs_permission(struct inode *ino, int desired, struct nameidata *nd)
if (desired & MAY_WRITE) w = 1;
if (desired & MAY_EXEC) x = 1;
name = inode_name(ino, 0);
- if (name == NULL) return(-ENOMEM);
+ if (name == NULL)
+ return -ENOMEM;
if (S_ISCHR(ino->i_mode) || S_ISBLK(ino->i_mode) ||
S_ISFIFO(ino->i_mode) || S_ISSOCK(ino->i_mode))
@@ -820,6 +831,8 @@ int hostfs_setattr(struct dentry *dentry, struct iattr *attr)
char *name;
int err;
+ int fd = HOSTFS_I(dentry->d_inode)->fd;
+
err = inode_change_ok(dentry->d_inode, attr);
if (err)
return err;
@@ -863,20 +876,21 @@ int hostfs_setattr(struct dentry *dentry, struct iattr *attr)
attrs.ia_valid |= HOSTFS_ATTR_MTIME_SET;
}
name = dentry_name(dentry, 0);
- if(name == NULL) return(-ENOMEM);
- err = set_attr(name, &attrs);
+ if(name == NULL)
+ return -ENOMEM;
+ err = set_attr(name, &attrs, fd);
kfree(name);
if(err)
- return(err);
+ return err;
- return(inode_setattr(dentry->d_inode, attr));
+ return inode_setattr(dentry->d_inode, attr);
}
int hostfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
struct kstat *stat)
{
generic_fillattr(dentry->d_inode, stat);
- return(0);
+ return 0;
}
static const struct inode_operations hostfs_iops = {
@@ -915,7 +929,8 @@ int hostfs_link_readpage(struct file *file, struct page *page)
buffer = kmap(page);
name = inode_name(page->mapping->host, 0);
- if(name == NULL) return(-ENOMEM);
+ if(name == NULL)
+ return -ENOMEM;
err = do_readlink(name, buffer, PAGE_CACHE_SIZE);
kfree(name);
if(err == PAGE_CACHE_SIZE)
@@ -928,7 +943,7 @@ int hostfs_link_readpage(struct file *file, struct page *page)
}
kunmap(page);
unlock_page(page);
- return(err);
+ return err;
}
static const struct address_space_operations hostfs_link_aops = {
@@ -978,20 +993,20 @@ static int hostfs_fill_sb_common(struct super_block *sb, void *d, int silent)
err = read_inode(root_inode);
if(err){
- /* No iput in this case because the dput does that for us */
- dput(sb->s_root);
- sb->s_root = NULL;
+ /* No iput in this case because the dput does that for us */
+ dput(sb->s_root);
+ sb->s_root = NULL;
goto out;
- }
+ }
- return(0);
+ return 0;
- out_put:
- iput(root_inode);
- out_free:
+out_put:
+ iput(root_inode);
+out_free:
kfree(host_root_path);
- out:
- return(err);
+out:
+ return err;
}
static int hostfs_read_sb(struct file_system_type *type,
@@ -1011,7 +1026,7 @@ static struct file_system_type hostfs_type = {
static int __init init_hostfs(void)
{
- return(register_filesystem(&hostfs_type));
+ return register_filesystem(&hostfs_type);
}
static void __exit exit_hostfs(void)
@@ -1022,14 +1037,3 @@ static void __exit exit_hostfs(void)
module_init(init_hostfs)
module_exit(exit_hostfs)
MODULE_LICENSE("GPL");
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 01:09:53 +0000