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OpenCloudOS-Kernel
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switch befs long symlinks to page_symlink_operations 

just give them the right ->readpage()...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2015-11-13 06:57:13 -05:00
parent 527e9316f8
commit 11803f97f0
1 changed files with 22 additions and 19 deletions
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41
fs/befs/linuxvfs.c
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@ -42,7 +42,7 @@ static struct inode *befs_iget(struct super_block *, unsigned long);
static struct inode *befs_alloc_inode(struct super_block *sb);
static void befs_destroy_inode(struct inode *inode);
static void befs_destroy_inodecache(void);
static const char *befs_follow_link(struct dentry *, void **);
static int befs_symlink_readpage(struct file *, struct page *);
static int befs_utf2nls(struct super_block *sb, const char *in, int in_len,
char **out, int *out_len);
static int befs_nls2utf(struct super_block *sb, const char *in, int in_len,
@ -79,10 +79,8 @@ static const struct address_space_operations befs_aops = {
.bmap = befs_bmap,
};
static const struct inode_operations befs_symlink_inode_operations = {
.readlink = generic_readlink,
.follow_link = befs_follow_link,
.put_link = kfree_put_link,
static const struct address_space_operations befs_symlink_aops = {
.readpage = befs_symlink_readpage,
};
/*
@ -398,7 +396,8 @@ static struct inode *befs_iget(struct super_block *sb, unsigned long ino)
inode->i_fop = &befs_dir_operations;
} else if (S_ISLNK(inode->i_mode)) {
if (befs_ino->i_flags & BEFS_LONG_SYMLINK) {
inode->i_op = &befs_symlink_inode_operations;
inode->i_op = &page_symlink_inode_operations;
inode->i_mapping->a_ops = &befs_symlink_aops;
} else {
inode->i_link = befs_ino->i_data.symlink;
inode->i_op = &simple_symlink_inode_operations;
@ -463,31 +462,35 @@ befs_destroy_inodecache(void)
* The data stream become link name. Unless the LONG_SYMLINK
* flag is set.
*/
static const char *
befs_follow_link(struct dentry *dentry, void **cookie)
static int befs_symlink_readpage(struct file *unused, struct page *page)
{
struct super_block *sb = dentry->d_sb;
struct befs_inode_info *befs_ino = BEFS_I(d_inode(dentry));
struct inode *inode = page->mapping->host;
struct super_block *sb = inode->i_sb;
struct befs_inode_info *befs_ino = BEFS_I(inode);
befs_data_stream *data = &befs_ino->i_data.ds;
befs_off_t len = data->size;
char *link;
char *link = kmap(page);
if (len == 0) {
if (len == 0 || len > PAGE_SIZE) {
befs_error(sb, "Long symlink with illegal length");
return ERR_PTR(-EIO);
goto fail;
}
befs_debug(sb, "Follow long symlink");
link = kmalloc(len, GFP_NOFS);
if (!link)
return ERR_PTR(-ENOMEM);
if (befs_read_lsymlink(sb, data, link, len) != len) {
kfree(link);
befs_error(sb, "Failed to read entire long symlink");
return ERR_PTR(-EIO);
goto fail;
}
link[len - 1] = '\0';
return *cookie = link;
SetPageUptodate(page);
kunmap(page);
unlock_page(page);
return 0;
fail:
SetPageError(page);
kunmap(page);
unlock_page(page);
return -EIO;
}
/*