nfsd4: reshuffle lease-setting code to allow reuse

[safe/jmp/linux-2.6] / fs / hostfs / hostfs_kern.c

diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 2b9b357..032604e 100644 (file)
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -11,6 +11,8 @@
 #include <linux/mm.h>
 #include <linux/pagemap.h>
 #include <linux/statfs.h>
+#include <linux/seq_file.h>
+#include <linux/mount.h>
 #include "hostfs.h"
 #include "init.h"
 #include "kern.h"
@@ -18,7 +20,7 @@
 struct hostfs_inode_info {
        char *host_filename;
        int fd;
-       int mode;
+       fmode_t mode;
        struct inode vfs_inode;
 };
 
@@ -29,12 +31,12 @@ static inline struct hostfs_inode_info *HOSTFS_I(struct inode *inode)
 
 #define FILE_HOSTFS_I(file) HOSTFS_I((file)->f_path.dentry->d_inode)
 
-int hostfs_d_delete(struct dentry *dentry)
+static int hostfs_d_delete(struct dentry *dentry)
 {
        return 1;
 }
 
-struct dentry_operations hostfs_dentry_ops = {
+static const struct dentry_operations hostfs_dentry_ops = {
        .d_delete               = hostfs_d_delete,
 };
 
@@ -166,7 +168,7 @@ static char *follow_link(char *link)
                if (name == NULL)
                        goto out;
 
-               n = do_readlink(link, name, len);
+               n = hostfs_do_readlink(link, name, len);
                if (n < len)
                        break;
                len *= 2;
@@ -322,12 +324,25 @@ static void hostfs_destroy_inode(struct inode *inode)
        kfree(HOSTFS_I(inode));
 }
 
+static int hostfs_show_options(struct seq_file *seq, struct vfsmount *vfs)
+{
+       struct inode *root = vfs->mnt_sb->s_root->d_inode;
+       const char *root_path = HOSTFS_I(root)->host_filename;
+       size_t offset = strlen(root_ino) + 1;
+
+       if (strlen(root_path) > offset)
+               seq_printf(seq, ",%s", root_path + offset);
+
+       return 0;
+}
+
 static const struct super_operations hostfs_sbops = {
        .alloc_inode    = hostfs_alloc_inode,
        .drop_inode     = generic_delete_inode,
        .delete_inode   = hostfs_delete_inode,
        .destroy_inode  = hostfs_destroy_inode,
        .statfs         = hostfs_statfs,
+       .show_options   = hostfs_show_options,
 };
 
 int hostfs_readdir(struct file *file, void *ent, filldir_t filldir)
@@ -358,7 +373,8 @@ int hostfs_readdir(struct file *file, void *ent, filldir_t filldir)
 int hostfs_file_open(struct inode *ino, struct file *file)
 {
        char *name;
-       int mode = 0, r = 0, w = 0, fd;
+       fmode_t mode = 0;
+       int r = 0, w = 0, fd;
 
        mode = file->f_mode & (FMODE_READ | FMODE_WRITE);
        if ((mode & HOSTFS_I(ino)->mode) == mode)
@@ -485,7 +501,7 @@ int hostfs_write_begin(struct file *file, struct address_space *mapping,
 {
        pgoff_t index = pos >> PAGE_CACHE_SHIFT;
 
-       *pagep = __grab_cache_page(mapping, index);
+       *pagep = grab_cache_page_write_begin(mapping, index, flags);
        if (!*pagep)
                return -ENOMEM;
        return 0;
@@ -807,7 +823,7 @@ int hostfs_rename(struct inode *from_ino, struct dentry *from,
        return err;
 }
 
-int hostfs_permission(struct inode *ino, int desired, struct nameidata *nd)
+int hostfs_permission(struct inode *ino, int desired)
 {
        char *name;
        int r = 0, w = 0, x = 0, err;
@@ -927,7 +943,7 @@ int hostfs_link_readpage(struct file *file, struct page *page)
        name = inode_name(page->mapping->host, 0);
        if (name == NULL)
                return -ENOMEM;
-       err = do_readlink(name, buffer, PAGE_CACHE_SIZE);
+       err = hostfs_do_readlink(name, buffer, PAGE_CACHE_SIZE);
        kfree(name);
        if (err == PAGE_CACHE_SIZE)
                err = -E2BIG;
@@ -956,6 +972,7 @@ static int hostfs_fill_sb_common(struct super_block *sb, void *d, int silent)
        sb->s_blocksize_bits = 10;
        sb->s_magic = HOSTFS_SUPER_MAGIC;
        sb->s_op = &hostfs_sbops;
+       sb->s_maxbytes = MAX_LFS_FILESIZE;
 
        /* NULL is printed as <NULL> by sprintf: avoid that. */
        if (req_root == NULL)