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fs/9p: Don't update file type when updating file attributes
We should only update attributes that we can change on stat2inode. Also do file type initialization in v9fs_init_inode. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@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
5441ae5eb3
commit
45089142b1
@ -54,9 +54,9 @@ extern struct kmem_cache *v9fs_inode_cache;
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struct inode *v9fs_alloc_inode(struct super_block *sb);
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void v9fs_destroy_inode(struct inode *inode);
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struct inode *v9fs_get_inode(struct super_block *sb, int mode);
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struct inode *v9fs_get_inode(struct super_block *sb, int mode, dev_t);
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int v9fs_init_inode(struct v9fs_session_info *v9ses,
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struct inode *inode, int mode);
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struct inode *inode, int mode, dev_t);
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void v9fs_evict_inode(struct inode *inode);
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ino_t v9fs_qid2ino(struct p9_qid *qid);
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void v9fs_stat2inode(struct p9_wstat *, struct inode *, struct super_block *);
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@ -95,15 +95,18 @@ static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode)
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/**
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* p9mode2unixmode- convert plan9 mode bits to unix mode bits
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* @v9ses: v9fs session information
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* @mode: mode to convert
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* @stat: p9_wstat from which mode need to be derived
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* @rdev: major number, minor number in case of device files.
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*
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*/
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static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode)
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static int p9mode2unixmode(struct v9fs_session_info *v9ses,
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struct p9_wstat *stat, dev_t *rdev)
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{
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int res;
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int mode = stat->mode;
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res = mode & 0777;
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res = mode & S_IALLUGO;
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*rdev = 0;
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if ((mode & P9_DMDIR) == P9_DMDIR)
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res |= S_IFDIR;
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@ -116,9 +119,26 @@ static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode)
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&& (v9ses->nodev == 0))
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res |= S_IFIFO;
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else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses))
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&& (v9ses->nodev == 0))
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res |= S_IFBLK;
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else
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&& (v9ses->nodev == 0)) {
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char type = 0, ext[32];
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int major = -1, minor = -1;
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strncpy(ext, stat->extension, sizeof(ext));
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sscanf(ext, "%c %u %u", &type, &major, &minor);
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switch (type) {
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case 'c':
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res |= S_IFCHR;
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break;
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case 'b':
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res |= S_IFBLK;
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break;
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default:
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P9_DPRINTK(P9_DEBUG_ERROR,
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"Unknown special type %c %s\n", type,
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stat->extension);
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};
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*rdev = MKDEV(major, minor);
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} else
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res |= S_IFREG;
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if (v9fs_proto_dotu(v9ses)) {
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@ -131,7 +151,6 @@ static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode)
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if ((mode & P9_DMSETVTX) == P9_DMSETVTX)
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res |= S_ISVTX;
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}
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return res;
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}
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@ -242,13 +261,13 @@ void v9fs_destroy_inode(struct inode *inode)
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}
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int v9fs_init_inode(struct v9fs_session_info *v9ses,
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struct inode *inode, int mode)
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struct inode *inode, int mode, dev_t rdev)
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{
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int err = 0;
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inode_init_owner(inode, NULL, mode);
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inode->i_blocks = 0;
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inode->i_rdev = 0;
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inode->i_rdev = rdev;
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inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
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inode->i_mapping->a_ops = &v9fs_addr_operations;
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@ -335,7 +354,7 @@ error:
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*
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*/
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struct inode *v9fs_get_inode(struct super_block *sb, int mode)
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struct inode *v9fs_get_inode(struct super_block *sb, int mode, dev_t rdev)
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{
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int err;
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struct inode *inode;
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@ -348,7 +367,7 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode)
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P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n");
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return ERR_PTR(-ENOMEM);
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}
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err = v9fs_init_inode(v9ses, inode, mode);
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err = v9fs_init_inode(v9ses, inode, mode, rdev);
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if (err) {
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iput(inode);
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return ERR_PTR(err);
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@ -435,11 +454,12 @@ void v9fs_evict_inode(struct inode *inode)
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static int v9fs_test_inode(struct inode *inode, void *data)
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{
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int umode;
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dev_t rdev;
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struct v9fs_inode *v9inode = V9FS_I(inode);
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struct p9_wstat *st = (struct p9_wstat *)data;
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struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
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umode = p9mode2unixmode(v9ses, st->mode);
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umode = p9mode2unixmode(v9ses, st, &rdev);
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/* don't match inode of different type */
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if ((inode->i_mode & S_IFMT) != (umode & S_IFMT))
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return 0;
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@ -473,6 +493,7 @@ static struct inode *v9fs_qid_iget(struct super_block *sb,
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struct p9_wstat *st,
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int new)
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{
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dev_t rdev;
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int retval, umode;
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unsigned long i_ino;
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struct inode *inode;
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@ -496,8 +517,8 @@ static struct inode *v9fs_qid_iget(struct super_block *sb,
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* later.
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*/
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inode->i_ino = i_ino;
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umode = p9mode2unixmode(v9ses, st->mode);
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retval = v9fs_init_inode(v9ses, inode, umode);
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umode = p9mode2unixmode(v9ses, st, &rdev);
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retval = v9fs_init_inode(v9ses, inode, umode, rdev);
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if (retval)
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goto error;
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@ -1000,7 +1021,7 @@ v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
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return PTR_ERR(st);
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v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb);
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generic_fillattr(dentry->d_inode, stat);
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generic_fillattr(dentry->d_inode, stat);
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p9stat_free(st);
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kfree(st);
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@ -1084,6 +1105,7 @@ void
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v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode,
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struct super_block *sb)
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{
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mode_t mode;
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char ext[32];
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char tag_name[14];
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unsigned int i_nlink;
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@ -1119,31 +1141,9 @@ v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode,
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inode->i_nlink = i_nlink;
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}
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}
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inode->i_mode = p9mode2unixmode(v9ses, stat->mode);
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if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) {
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char type = 0;
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int major = -1;
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int minor = -1;
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strncpy(ext, stat->extension, sizeof(ext));
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sscanf(ext, "%c %u %u", &type, &major, &minor);
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switch (type) {
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case 'c':
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inode->i_mode &= ~S_IFBLK;
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inode->i_mode |= S_IFCHR;
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break;
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case 'b':
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break;
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default:
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P9_DPRINTK(P9_DEBUG_ERROR,
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"Unknown special type %c %s\n", type,
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stat->extension);
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};
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inode->i_rdev = MKDEV(major, minor);
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init_special_inode(inode, inode->i_mode, inode->i_rdev);
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} else
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inode->i_rdev = 0;
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mode = stat->mode & S_IALLUGO;
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mode |= inode->i_mode & ~S_IALLUGO;
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inode->i_mode = mode;
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i_size_write(inode, stat->length);
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/* not real number of blocks, but 512 byte ones ... */
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@ -1409,6 +1409,8 @@ v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
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int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode)
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{
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int umode;
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dev_t rdev;
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loff_t i_size;
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struct p9_wstat *st;
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struct v9fs_session_info *v9ses;
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@ -1417,6 +1419,12 @@ int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode)
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st = p9_client_stat(fid);
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if (IS_ERR(st))
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return PTR_ERR(st);
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/*
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* Don't update inode if the file type is different
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*/
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umode = p9mode2unixmode(v9ses, st, &rdev);
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if ((inode->i_mode & S_IFMT) != (umode & S_IFMT))
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goto out;
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spin_lock(&inode->i_lock);
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/*
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@ -1428,6 +1436,7 @@ int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode)
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if (v9ses->cache)
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inode->i_size = i_size;
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spin_unlock(&inode->i_lock);
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out:
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p9stat_free(st);
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kfree(st);
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return 0;
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@ -153,7 +153,8 @@ static struct inode *v9fs_qid_iget_dotl(struct super_block *sb,
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* later.
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*/
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inode->i_ino = i_ino;
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retval = v9fs_init_inode(v9ses, inode, st->st_mode);
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retval = v9fs_init_inode(v9ses, inode,
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st->st_mode, new_decode_dev(st->st_rdev));
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if (retval)
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goto error;
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@ -414,7 +415,7 @@ static int v9fs_vfs_mkdir_dotl(struct inode *dir,
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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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inode = v9fs_get_inode(dir->i_sb, mode, 0);
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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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@ -540,6 +541,7 @@ int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr)
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void
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v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode)
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{
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mode_t mode;
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struct v9fs_inode *v9inode = V9FS_I(inode);
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if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) {
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@ -552,11 +554,10 @@ v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode)
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inode->i_uid = stat->st_uid;
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inode->i_gid = stat->st_gid;
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inode->i_nlink = stat->st_nlink;
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inode->i_mode = stat->st_mode;
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inode->i_rdev = new_decode_dev(stat->st_rdev);
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if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode)))
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init_special_inode(inode, inode->i_mode, inode->i_rdev);
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mode = stat->st_mode & S_IALLUGO;
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mode |= inode->i_mode & ~S_IALLUGO;
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inode->i_mode = mode;
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i_size_write(inode, stat->st_size);
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inode->i_blocks = stat->st_blocks;
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@ -664,7 +665,7 @@ v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry,
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fid = NULL;
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} else {
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/* Not in cached mode. No need to populate inode with stat */
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inode = v9fs_get_inode(dir->i_sb, S_IFLNK);
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inode = v9fs_get_inode(dir->i_sb, S_IFLNK, 0);
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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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@ -820,7 +821,7 @@ v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode,
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* Not in cached mode. No need to populate inode with stat.
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* socket syscall returns a fd, so we need instantiate
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*/
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inode = v9fs_get_inode(dir->i_sb, mode);
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inode = v9fs_get_inode(dir->i_sb, mode, rdev);
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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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@ -886,6 +887,11 @@ int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode)
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st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
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if (IS_ERR(st))
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return PTR_ERR(st);
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/*
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* Don't update inode if the file type is different
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*/
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if ((inode->i_mode & S_IFMT) != (st->st_mode & S_IFMT))
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goto out;
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spin_lock(&inode->i_lock);
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/*
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@ -897,6 +903,7 @@ int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode)
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if (v9ses->cache)
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inode->i_size = i_size;
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spin_unlock(&inode->i_lock);
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out:
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kfree(st);
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return 0;
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}
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@ -149,7 +149,7 @@ static struct dentry *v9fs_mount(struct file_system_type *fs_type, int flags,
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else
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sb->s_d_op = &v9fs_dentry_operations;
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inode = v9fs_get_inode(sb, S_IFDIR | mode);
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inode = v9fs_get_inode(sb, S_IFDIR | mode, 0);
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if (IS_ERR(inode)) {
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retval = PTR_ERR(inode);
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goto release_sb;
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