Commit 9b6533c9 authored by Sripathi Kodi's avatar Sripathi Kodi Committed by Eric Van Hensbergen
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9p: VFS switches for 9p2000.L: VFS switches 



Implements VFS switches for 9p2000.L protocol.

Signed-off-by: default avatarSripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: default avatarEric Van Hensbergen <ericvh@gmail.com>
parent c56e4acf

fs/9p/v9fs_vfs.h

+2 −0
Original line number Diff line number Diff line
@@ -40,7 +40,9 @@ 
extern struct file_system_type v9fs_fs_type;

extern const struct address_space_operations v9fs_addr_operations;

extern const struct file_operations v9fs_file_operations;

extern const struct file_operations v9fs_file_operations_dotl;

extern const struct file_operations v9fs_dir_operations;

extern const struct file_operations v9fs_dir_operations_dotl;

extern const struct dentry_operations v9fs_dentry_operations;

extern const struct dentry_operations v9fs_cached_dentry_operations;

fs/9p/vfs_dir.c

+8 −0
Original line number Diff line number Diff line
@@ -203,3 +203,11 @@ const struct file_operations v9fs_dir_operations = { 
	.open = v9fs_file_open,

	.release = v9fs_dir_release,

};



const struct file_operations v9fs_dir_operations_dotl = {

	.read = generic_read_dir,

	.llseek = generic_file_llseek,

	.readdir = v9fs_dir_readdir,

	.open = v9fs_file_open,

	.release = v9fs_dir_release,

};

fs/9p/vfs_file.c

+11 −0
Original line number Diff line number Diff line
@@ -296,3 +296,14 @@ const struct file_operations v9fs_file_operations = { 
	.mmap = generic_file_readonly_mmap,

	.fsync = v9fs_file_fsync,

};



const struct file_operations v9fs_file_operations_dotl = {

	.llseek = generic_file_llseek,

	.read = v9fs_file_read,

	.write = v9fs_file_write,

	.open = v9fs_file_open,

	.release = v9fs_dir_release,

	.lock = v9fs_file_lock,

	.mmap = generic_file_readonly_mmap,

	.fsync = v9fs_file_fsync,

};

fs/9p/vfs_inode.c

+60 −11
Original line number Diff line number Diff line
@@ -44,9 +44,12 @@ 
#include "cache.h"



static const struct inode_operations v9fs_dir_inode_operations;

static const struct inode_operations v9fs_dir_inode_operations_ext;

static const struct inode_operations v9fs_dir_inode_operations_dotu;

static const struct inode_operations v9fs_dir_inode_operations_dotl;

static const struct inode_operations v9fs_file_inode_operations;

static const struct inode_operations v9fs_file_inode_operations_dotl;

static const struct inode_operations v9fs_symlink_inode_operations;

static const struct inode_operations v9fs_symlink_inode_operations_dotl;



/**

 * unixmode2p9mode - convert unix mode bits to plan 9
@@ -275,25 +278,44 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode) 
		init_special_inode(inode, inode->i_mode, inode->i_rdev);

		break;

	case S_IFREG:

		if (v9fs_proto_dotl(v9ses)) {

			inode->i_op = &v9fs_file_inode_operations_dotl;

			inode->i_fop = &v9fs_file_operations_dotl;

		} else {

			inode->i_op = &v9fs_file_inode_operations;

			inode->i_fop = &v9fs_file_operations;

		}



		break;



	case S_IFLNK:

		if (!v9fs_proto_dotu(v9ses)) {

			P9_DPRINTK(P9_DEBUG_ERROR,

				   "extended modes used w/o 9P2000.u\n");

		if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) {

			P9_DPRINTK(P9_DEBUG_ERROR, "extended modes used with "

						"legacy protocol.\n");

			err = -EINVAL;

			goto error;

		}



		if (v9fs_proto_dotl(v9ses))

			inode->i_op = &v9fs_symlink_inode_operations_dotl;

		else

			inode->i_op = &v9fs_symlink_inode_operations;



		break;

	case S_IFDIR:

		inc_nlink(inode);

		if (v9fs_proto_dotu(v9ses))

			inode->i_op = &v9fs_dir_inode_operations_ext;

		if (v9fs_proto_dotl(v9ses))

			inode->i_op = &v9fs_dir_inode_operations_dotl;

		else if (v9fs_proto_dotu(v9ses))

			inode->i_op = &v9fs_dir_inode_operations_dotu;

		else

			inode->i_op = &v9fs_dir_inode_operations;



		if (v9fs_proto_dotl(v9ses))

			inode->i_fop = &v9fs_dir_operations_dotl;

		else

			inode->i_fop = &v9fs_dir_operations;



		break;

	default:

		P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n",
@@ -1208,7 +1230,21 @@ v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) 
	return retval;

}



static const struct inode_operations v9fs_dir_inode_operations_ext = {

static const struct inode_operations v9fs_dir_inode_operations_dotu = {

	.create = v9fs_vfs_create,

	.lookup = v9fs_vfs_lookup,

	.symlink = v9fs_vfs_symlink,

	.link = v9fs_vfs_link,

	.unlink = v9fs_vfs_unlink,

	.mkdir = v9fs_vfs_mkdir,

	.rmdir = v9fs_vfs_rmdir,

	.mknod = v9fs_vfs_mknod,

	.rename = v9fs_vfs_rename,

	.getattr = v9fs_vfs_getattr,

	.setattr = v9fs_vfs_setattr,

};



static const struct inode_operations v9fs_dir_inode_operations_dotl = {

	.create = v9fs_vfs_create,

	.lookup = v9fs_vfs_lookup,

	.symlink = v9fs_vfs_symlink,
@@ -1239,6 +1275,11 @@ static const struct inode_operations v9fs_file_inode_operations = { 
	.setattr = v9fs_vfs_setattr,

};



static const struct inode_operations v9fs_file_inode_operations_dotl = {

	.getattr = v9fs_vfs_getattr,

	.setattr = v9fs_vfs_setattr,

};



static const struct inode_operations v9fs_symlink_inode_operations = {

	.readlink = generic_readlink,

	.follow_link = v9fs_vfs_follow_link,
@@ -1246,3 +1287,11 @@ static const struct inode_operations v9fs_symlink_inode_operations = { 
	.getattr = v9fs_vfs_getattr,

	.setattr = v9fs_vfs_setattr,

};



static const struct inode_operations v9fs_symlink_inode_operations_dotl = {

	.readlink = generic_readlink,

	.follow_link = v9fs_vfs_follow_link,

	.put_link = v9fs_vfs_put_link,

	.getattr = v9fs_vfs_getattr,

	.setattr = v9fs_vfs_setattr,

};

fs/9p/vfs_super.c

+16 −2
Original line number Diff line number Diff line
@@ -45,7 +45,7 @@ 
#include "v9fs_vfs.h"

#include "fid.h"



static const struct super_operations v9fs_super_ops;

static const struct super_operations v9fs_super_ops, v9fs_super_ops_dotl;



/**

 * v9fs_set_super - set the superblock
@@ -76,6 +76,9 @@ v9fs_fill_super(struct super_block *sb, struct v9fs_session_info *v9ses, 
	sb->s_blocksize_bits = fls(v9ses->maxdata - 1);

	sb->s_blocksize = 1 << sb->s_blocksize_bits;

	sb->s_magic = V9FS_MAGIC;

	if (v9fs_proto_dotl(v9ses))

		sb->s_op = &v9fs_super_ops_dotl;

	else

		sb->s_op = &v9fs_super_ops;

	sb->s_bdi = &v9ses->bdi;
@@ -222,6 +225,17 @@ static const struct super_operations v9fs_super_ops = { 
	.umount_begin = v9fs_umount_begin,

};



static const struct super_operations v9fs_super_ops_dotl = {

#ifdef CONFIG_9P_FSCACHE

	.alloc_inode = v9fs_alloc_inode,

	.destroy_inode = v9fs_destroy_inode,

#endif

	.statfs = simple_statfs,

	.clear_inode = v9fs_clear_inode,

	.show_options = generic_show_options,

	.umount_begin = v9fs_umount_begin,

};



struct file_system_type v9fs_fs_type = {

	.name = "9p",

	.get_sb = v9fs_get_sb,