Commit 2608e3d0 authored by Linus Torvalds's avatar Linus Torvalds

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs

Pull v9fs updates from Eric Van Hensbergen:
 "Just fixes and simplifications"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
  fs/9p: Fix atomic_open
  fs/9p: Don't use O_TRUNC flag in TOPEN and TLOPEN request
  locking in fs/9p ->readdir()
parents 33673dcb b6f4bee0
......@@ -52,10 +52,9 @@
*/
struct p9_rdir {
struct mutex mutex;
int head;
int tail;
uint8_t *buf;
uint8_t buf[];
};
/**
......@@ -93,33 +92,12 @@ static void p9stat_init(struct p9_wstat *stbuf)
*
*/
static int v9fs_alloc_rdir_buf(struct file *filp, int buflen)
static struct p9_rdir *v9fs_alloc_rdir_buf(struct file *filp, int buflen)
{
struct p9_rdir *rdir;
struct p9_fid *fid;
int err = 0;
fid = filp->private_data;
if (!fid->rdir) {
rdir = kmalloc(sizeof(struct p9_rdir) + buflen, GFP_KERNEL);
if (rdir == NULL) {
err = -ENOMEM;
goto exit;
}
spin_lock(&filp->f_dentry->d_lock);
if (!fid->rdir) {
rdir->buf = (uint8_t *)rdir + sizeof(struct p9_rdir);
mutex_init(&rdir->mutex);
rdir->head = rdir->tail = 0;
fid->rdir = (void *) rdir;
rdir = NULL;
}
spin_unlock(&filp->f_dentry->d_lock);
kfree(rdir);
}
exit:
return err;
struct p9_fid *fid = filp->private_data;
if (!fid->rdir)
fid->rdir = kzalloc(sizeof(struct p9_rdir) + buflen, GFP_KERNEL);
return fid->rdir;
}
/**
......@@ -145,20 +123,16 @@ static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
buflen = fid->clnt->msize - P9_IOHDRSZ;
err = v9fs_alloc_rdir_buf(filp, buflen);
if (err)
goto exit;
rdir = (struct p9_rdir *) fid->rdir;
rdir = v9fs_alloc_rdir_buf(filp, buflen);
if (!rdir)
return -ENOMEM;
err = mutex_lock_interruptible(&rdir->mutex);
if (err)
return err;
while (err == 0) {
while (1) {
if (rdir->tail == rdir->head) {
err = v9fs_file_readn(filp, rdir->buf, NULL,
buflen, filp->f_pos);
if (err <= 0)
goto unlock_and_exit;
return err;
rdir->head = 0;
rdir->tail = err;
......@@ -169,9 +143,8 @@ static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
rdir->tail - rdir->head, &st);
if (err) {
p9_debug(P9_DEBUG_VFS, "returned %d\n", err);
err = -EIO;
p9stat_free(&st);
goto unlock_and_exit;
return -EIO;
}
reclen = st.size+2;
......@@ -180,19 +153,13 @@ static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
p9stat_free(&st);
if (over) {
err = 0;
goto unlock_and_exit;
}
if (over)
return 0;
rdir->head += reclen;
filp->f_pos += reclen;
}
}
unlock_and_exit:
mutex_unlock(&rdir->mutex);
exit:
return err;
}
/**
......@@ -218,21 +185,16 @@ static int v9fs_dir_readdir_dotl(struct file *filp, void *dirent,
buflen = fid->clnt->msize - P9_READDIRHDRSZ;
err = v9fs_alloc_rdir_buf(filp, buflen);
if (err)
goto exit;
rdir = (struct p9_rdir *) fid->rdir;
err = mutex_lock_interruptible(&rdir->mutex);
if (err)
return err;
rdir = v9fs_alloc_rdir_buf(filp, buflen);
if (!rdir)
return -ENOMEM;
while (err == 0) {
while (1) {
if (rdir->tail == rdir->head) {
err = p9_client_readdir(fid, rdir->buf, buflen,
filp->f_pos);
if (err <= 0)
goto unlock_and_exit;
return err;
rdir->head = 0;
rdir->tail = err;
......@@ -245,8 +207,7 @@ static int v9fs_dir_readdir_dotl(struct file *filp, void *dirent,
&curdirent);
if (err < 0) {
p9_debug(P9_DEBUG_VFS, "returned %d\n", err);
err = -EIO;
goto unlock_and_exit;
return -EIO;
}
/* d_off in dirent structure tracks the offset into
......@@ -261,20 +222,13 @@ static int v9fs_dir_readdir_dotl(struct file *filp, void *dirent,
curdirent.d_type);
oldoffset = curdirent.d_off;
if (over) {
err = 0;
goto unlock_and_exit;
}
if (over)
return 0;
filp->f_pos = curdirent.d_off;
rdir->head += err;
}
}
unlock_and_exit:
mutex_unlock(&rdir->mutex);
exit:
return err;
}
......
......@@ -80,10 +80,6 @@ int v9fs_file_open(struct inode *inode, struct file *file)
p9_client_clunk(fid);
return err;
}
if (file->f_flags & O_TRUNC) {
i_size_write(inode, 0);
inode->i_blocks = 0;
}
if ((file->f_flags & O_APPEND) &&
(!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)))
generic_file_llseek(file, 0, SEEK_END);
......
......@@ -192,9 +192,6 @@ int v9fs_uflags2omode(int uflags, int extended)
break;
}
if (uflags & O_TRUNC)
ret |= P9_OTRUNC;
if (extended) {
if (uflags & O_EXCL)
ret |= P9_OEXCL;
......
......@@ -186,7 +186,6 @@ static int v9fs_mapped_dotl_flags(int flags)
{ O_CREAT, P9_DOTL_CREATE },
{ O_EXCL, P9_DOTL_EXCL },
{ O_NOCTTY, P9_DOTL_NOCTTY },
{ O_TRUNC, P9_DOTL_TRUNC },
{ O_APPEND, P9_DOTL_APPEND },
{ O_NONBLOCK, P9_DOTL_NONBLOCK },
{ O_DSYNC, P9_DOTL_DSYNC },
......@@ -268,8 +267,14 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
}
/* Only creates */
if (!(flags & O_CREAT) || dentry->d_inode)
if (!(flags & O_CREAT))
return finish_no_open(file, res);
else if (dentry->d_inode) {
if ((flags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
return -EEXIST;
else
return finish_no_open(file, res);
}
v9ses = v9fs_inode2v9ses(dir);
......
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