fs/9p: Implement create time inheritance
Inherit default ACL on create Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
This commit is contained in:
Aneesh Kumar K.V
Eric Van Hensbergen
parent
6e8dc55550
commit
ad77dbce56
3 changed files with 166 additions and 44 deletions
52
fs/9p/acl.c
52
fs/9p/acl.c
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@ -152,6 +152,58 @@ int v9fs_acl_chmod(struct dentry *dentry)
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return retval;
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}
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int v9fs_set_create_acl(struct dentry *dentry,
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struct posix_acl *dpacl, struct posix_acl *pacl)
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{
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if (dpacl)
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v9fs_set_acl(dentry, ACL_TYPE_DEFAULT, dpacl);
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if (pacl)
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v9fs_set_acl(dentry, ACL_TYPE_ACCESS, pacl);
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posix_acl_release(dpacl);
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posix_acl_release(pacl);
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return 0;
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}
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int v9fs_acl_mode(struct inode *dir, mode_t *modep,
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struct posix_acl **dpacl, struct posix_acl **pacl)
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{
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int retval = 0;
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mode_t mode = *modep;
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struct posix_acl *acl = NULL;
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if (!S_ISLNK(mode)) {
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acl = v9fs_get_cached_acl(dir, ACL_TYPE_DEFAULT);
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if (IS_ERR(acl))
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return PTR_ERR(acl);
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if (!acl)
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mode &= ~current_umask();
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}
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if (acl) {
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struct posix_acl *clone;
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if (S_ISDIR(mode))
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*dpacl = acl;
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clone = posix_acl_clone(acl, GFP_NOFS);
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retval = -ENOMEM;
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if (!clone)
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goto cleanup;
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retval = posix_acl_create_masq(clone, &mode);
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if (retval < 0) {
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posix_acl_release(clone);
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goto cleanup;
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}
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if (retval > 0)
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*pacl = clone;
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}
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*modep = mode;
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return 0;
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cleanup:
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posix_acl_release(acl);
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return retval;
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}
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static int v9fs_xattr_get_acl(struct dentry *dentry, const char *name,
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void *buffer, size_t size, int type)
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{
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17
fs/9p/acl.h
17
fs/9p/acl.h
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@ -18,6 +18,10 @@
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extern int v9fs_get_acl(struct inode *, struct p9_fid *);
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extern int v9fs_check_acl(struct inode *inode, int mask);
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extern int v9fs_acl_chmod(struct dentry *);
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extern int v9fs_set_create_acl(struct dentry *,
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struct posix_acl *, struct posix_acl *);
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extern int v9fs_acl_mode(struct inode *dir, mode_t *modep,
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struct posix_acl **dpacl, struct posix_acl **pacl);
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#else
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#define v9fs_check_acl NULL
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static inline int v9fs_get_acl(struct inode *inode, struct p9_fid *fid)
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@ -28,5 +32,18 @@ static inline int v9fs_acl_chmod(struct dentry *dentry)
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{
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return 0;
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}
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static inline int v9fs_set_create_acl(struct dentry *dentry,
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struct posix_acl *dpacl,
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struct posix_acl *pacl)
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{
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return 0;
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}
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static inline int v9fs_acl_mode(struct inode *dir, mode_t *modep,
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struct posix_acl **dpacl,
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struct posix_acl **pacl)
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{
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return 0;
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}
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#endif
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#endif /* FS_9P_XATTR_H */
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@ -662,19 +662,21 @@ v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
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*/
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static int
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v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int mode,
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v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int omode,
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struct nameidata *nd)
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{
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int err = 0;
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char *name = NULL;
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gid_t gid;
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int flags;
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mode_t mode;
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struct v9fs_session_info *v9ses;
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struct p9_fid *fid = NULL;
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struct p9_fid *dfid, *ofid;
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struct file *filp;
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struct p9_qid qid;
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struct inode *inode;
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struct posix_acl *pacl = NULL, *dacl = NULL;
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v9ses = v9fs_inode2v9ses(dir);
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if (nd && nd->flags & LOOKUP_OPEN)
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@ -684,7 +686,7 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int mode,
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name = (char *) dentry->d_name.name;
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P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_create_dotl: name:%s flags:0x%x "
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"mode:0x%x\n", name, flags, mode);
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"mode:0x%x\n", name, flags, omode);
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dfid = v9fs_fid_lookup(dentry->d_parent);
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if (IS_ERR(dfid)) {
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@ -702,6 +704,15 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int mode,
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}
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gid = v9fs_get_fsgid_for_create(dir);
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mode = omode;
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/* Update mode based on ACL value */
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err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
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if (err) {
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P9_DPRINTK(P9_DEBUG_VFS,
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"Failed to get acl values in creat %d\n", err);
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goto error;
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}
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err = p9_client_create_dotl(ofid, name, flags, mode, gid, &qid);
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if (err < 0) {
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P9_DPRINTK(P9_DEBUG_VFS,
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@ -709,42 +720,48 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int mode,
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err);
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goto error;
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}
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/* instantiate inode and assign the unopened fid to the dentry */
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if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE ||
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(nd && nd->flags & LOOKUP_OPEN)) {
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fid = p9_client_walk(dfid, 1, &name, 1);
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if (IS_ERR(fid)) {
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err = PTR_ERR(fid);
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P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
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err);
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fid = NULL;
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goto error;
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}
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/* No need to populate the inode if we are not opening the file AND
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* not in cached mode.
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*/
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if (!v9ses->cache && !(nd && nd->flags & LOOKUP_OPEN)) {
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/* Not in cached mode. No need to populate inode with stat */
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dentry->d_op = &v9fs_dentry_operations;
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p9_client_clunk(ofid);
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d_instantiate(dentry, NULL);
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return 0;
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}
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/* Now walk from the parent so we can get an unopened fid. */
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fid = p9_client_walk(dfid, 1, &name, 1);
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if (IS_ERR(fid)) {
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err = PTR_ERR(fid);
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P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
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fid = NULL;
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goto error;
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}
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/* instantiate inode and assign the unopened fid to dentry */
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inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
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if (IS_ERR(inode)) {
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err = PTR_ERR(inode);
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P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err);
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goto error;
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}
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if (v9ses->cache)
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inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
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if (IS_ERR(inode)) {
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err = PTR_ERR(inode);
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P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
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err);
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goto error;
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}
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dentry->d_op = &v9fs_cached_dentry_operations;
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else
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d_instantiate(dentry, inode);
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err = v9fs_fid_add(dentry, fid);
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if (err < 0)
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goto error;
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/* The fid would get clunked via a dput */
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fid = NULL;
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} else {
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/*
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* Not in cached mode. No need to populate
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* inode with stat. We need to get an inode
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* so that we can set the acl with dentry
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*/
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inode = v9fs_get_inode(dir->i_sb, mode);
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if (IS_ERR(inode)) {
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err = PTR_ERR(inode);
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goto error;
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}
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dentry->d_op = &v9fs_dentry_operations;
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d_instantiate(dentry, inode);
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err = v9fs_fid_add(dentry, fid);
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if (err < 0)
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goto error;
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d_instantiate(dentry, inode);
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}
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/* Now set the ACL based on the default value */
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v9fs_set_create_acl(dentry, dacl, pacl);
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/* if we are opening a file, assign the open fid to the file */
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if (nd && nd->flags & LOOKUP_OPEN) {
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@ -866,25 +883,28 @@ static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
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*
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*/
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static int v9fs_vfs_mkdir_dotl(struct inode *dir, struct dentry *dentry,
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int mode)
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static int v9fs_vfs_mkdir_dotl(struct inode *dir,
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struct dentry *dentry, int omode)
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{
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int err;
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struct v9fs_session_info *v9ses;
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struct p9_fid *fid = NULL, *dfid = NULL;
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gid_t gid;
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char *name;
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mode_t mode;
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struct inode *inode;
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struct p9_qid qid;
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struct dentry *dir_dentry;
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struct posix_acl *dacl = NULL, *pacl = NULL;
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P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
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err = 0;
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v9ses = v9fs_inode2v9ses(dir);
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mode |= S_IFDIR;
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omode |= S_IFDIR;
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if (dir->i_mode & S_ISGID)
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mode |= S_ISGID;
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omode |= S_ISGID;
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dir_dentry = v9fs_dentry_from_dir_inode(dir);
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dfid = v9fs_fid_lookup(dir_dentry);
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if (IS_ERR(dfid)) {
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@ -895,7 +915,14 @@ static int v9fs_vfs_mkdir_dotl(struct inode *dir, struct dentry *dentry,
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}
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gid = v9fs_get_fsgid_for_create(dir);
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mode = omode;
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/* Update mode based on ACL value */
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err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
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if (err) {
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P9_DPRINTK(P9_DEBUG_VFS,
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"Failed to get acl values in mkdir %d\n", err);
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goto error;
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}
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name = (char *) dentry->d_name.name;
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err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid);
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if (err < 0)
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@ -925,7 +952,23 @@ static int v9fs_vfs_mkdir_dotl(struct inode *dir, struct dentry *dentry,
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if (err < 0)
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goto error;
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fid = NULL;
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} else {
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/*
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* Not in cached mode. No need to populate
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* inode with stat. We need to get an inode
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* so that we can set the acl with dentry
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*/
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inode = v9fs_get_inode(dir->i_sb, mode);
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if (IS_ERR(inode)) {
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err = PTR_ERR(inode);
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goto error;
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}
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dentry->d_op = &v9fs_dentry_operations;
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d_instantiate(dentry, inode);
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}
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/* Now set the ACL based on the default value */
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v9fs_set_create_acl(dentry, dacl, pacl);
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error:
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if (fid)
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p9_client_clunk(fid);
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@ -1861,21 +1904,23 @@ v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
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*
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*/
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static int
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v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int mode,
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v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode,
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dev_t rdev)
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{
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int err;
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char *name;
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mode_t mode;
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struct v9fs_session_info *v9ses;
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struct p9_fid *fid = NULL, *dfid = NULL;
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struct inode *inode;
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gid_t gid;
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struct p9_qid qid;
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struct dentry *dir_dentry;
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struct posix_acl *dacl = NULL, *pacl = NULL;
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P9_DPRINTK(P9_DEBUG_VFS,
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" %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
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dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev));
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dentry->d_name.name, omode, MAJOR(rdev), MINOR(rdev));
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if (!new_valid_dev(rdev))
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return -EINVAL;
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@ -1891,7 +1936,14 @@ v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int mode,
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}
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gid = v9fs_get_fsgid_for_create(dir);
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mode = omode;
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/* Update mode based on ACL value */
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err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
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if (err) {
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P9_DPRINTK(P9_DEBUG_VFS,
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"Failed to get acl values in mknod %d\n", err);
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goto error;
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}
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name = (char *) dentry->d_name.name;
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err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid);
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@ -1935,7 +1987,8 @@ v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int mode,
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dentry->d_op = &v9fs_dentry_operations;
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d_instantiate(dentry, inode);
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}
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/* Now set the ACL based on the default value */
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v9fs_set_create_acl(dentry, dacl, pacl);
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error:
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if (fid)
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p9_client_clunk(fid);
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