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Diffstat (limited to 'fs/9p/vfs_inode.c')
-rw-r--r--fs/9p/vfs_inode.c111
1 files changed, 80 insertions, 31 deletions
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index f2434fc9d2c4..4331b3b5ee1c 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -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
@@ -253,9 +256,7 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode)
return ERR_PTR(-ENOMEM);
}
- inode->i_mode = mode;
- inode->i_uid = current_fsuid();
- inode->i_gid = current_fsgid();
+ inode_init_owner(inode, NULL, mode);
inode->i_blocks = 0;
inode->i_rdev = 0;
inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
@@ -275,25 +276,44 @@ 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:
- inode->i_op = &v9fs_file_inode_operations;
- inode->i_fop = &v9fs_file_operations;
+ 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;
}
- inode->i_op = &v9fs_symlink_inode_operations;
+
+ 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;
- inode->i_fop = &v9fs_dir_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",
@@ -434,14 +454,12 @@ static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir)
{
int retval;
struct inode *file_inode;
- struct v9fs_session_info *v9ses;
struct p9_fid *v9fid;
P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file,
rmdir);
file_inode = file->d_inode;
- v9ses = v9fs_inode2v9ses(file_inode);
v9fid = v9fs_fid_clone(file);
if (IS_ERR(v9fid))
return PTR_ERR(v9fid);
@@ -484,12 +502,11 @@ v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
ofid = NULL;
fid = NULL;
name = (char *) dentry->d_name.name;
- dfid = v9fs_fid_clone(dentry->d_parent);
+ dfid = v9fs_fid_lookup(dentry->d_parent);
if (IS_ERR(dfid)) {
err = PTR_ERR(dfid);
- P9_DPRINTK(P9_DEBUG_VFS, "fid clone failed %d\n", err);
- dfid = NULL;
- goto error;
+ P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
+ return ERR_PTR(err);
}
/* clone a fid to use for creation */
@@ -497,8 +514,7 @@ v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
if (IS_ERR(ofid)) {
err = PTR_ERR(ofid);
P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
- ofid = NULL;
- goto error;
+ return ERR_PTR(err);
}
err = p9_client_fcreate(ofid, name, perm, mode, extension);
@@ -508,14 +524,13 @@ v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
}
/* now walk from the parent so we can get unopened fid */
- fid = p9_client_walk(dfid, 1, &name, 0);
+ fid = p9_client_walk(dfid, 1, &name, 1);
if (IS_ERR(fid)) {
err = PTR_ERR(fid);
P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
fid = NULL;
goto error;
- } else
- dfid = NULL;
+ }
/* instantiate inode and assign the unopened fid to the dentry */
inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
@@ -538,9 +553,6 @@ v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
return ofid;
error:
- if (dfid)
- p9_client_clunk(dfid);
-
if (ofid)
p9_client_clunk(ofid);
@@ -675,8 +687,8 @@ static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
if (IS_ERR(fid)) {
result = PTR_ERR(fid);
if (result == -ENOENT) {
- d_add(dentry, NULL);
- return NULL;
+ inode = NULL;
+ goto inst_out;
}
return ERR_PTR(result);
@@ -693,7 +705,8 @@ static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
if (result < 0)
goto error;
- if ((fid->qid.version) && (v9ses->cache))
+inst_out:
+ if (v9ses->cache)
dentry->d_op = &v9fs_cached_dentry_operations;
else
dentry->d_op = &v9fs_dentry_operations;
@@ -772,6 +785,13 @@ v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
goto clunk_olddir;
}
+ if (v9fs_proto_dotl(v9ses)) {
+ retval = p9_client_rename(oldfid, newdirfid,
+ (char *) new_dentry->d_name.name);
+ if (retval != -ENOSYS)
+ goto clunk_newdir;
+ }
+
/* 9P can only handle file rename in the same directory */
if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) {
P9_DPRINTK(P9_DEBUG_ERROR,
@@ -1197,6 +1217,8 @@ v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev));
else if (S_ISFIFO(mode))
*name = 0;
+ else if (S_ISSOCK(mode))
+ *name = 0;
else {
__putname(name);
return -EINVAL;
@@ -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,
+};
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.