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SDB - Self-describing Bus
Commit cac7505b authored by Alessandro Rubini's avatar Alessandro Rubini
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sdbfs: added sdbfs_info, to keep names out of the sdb record 

Signed-off-by: Alessandro Rubini's avatarAlessandro Rubini <rubini@gnudd.com>
parent 7abdd04d
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Showing with 55 additions and 46 deletions
sdbfs/kernel/sdbfs-core.c
View file @ cac7505b
......@@ -40,28 +40,22 @@ static int sdbfs_readdir(struct file * filp,
{
struct inode *ino = filp->f_dentry->d_inode;
struct sdbfs_inode *inode;
struct sdb_device *s_d;
struct sdbfs_info *info;
unsigned long file_off = filp->f_pos;
unsigned long offset = ino->i_ino & ~1;
int i, j, n;
int i, n;
printk("%s\n", __func__);
inode = container_of(ino, struct sdbfs_inode, ino);
n = be16_to_cpu(inode->s_i.sdb_records) - 1;
n = inode->nfiles;
for (i = file_off; i < n; i++) {
char s[20];
offset += SDB_SIZE;
s_d = (struct sdb_device *)inode->files + i;
strncpy(s, s_d->sdb_component.product.name, 19);
for (j = 19; j; j--) {
s[j] = '\0';
if (s[j-1] != ' ')
break;
}
if (filldir(dirent, s, j, offset, offset, DT_UNKNOWN) < 0)
offset += SDB_SIZE; /* new inode number */
info = inode->files + i;
if (filldir(dirent, info->name, info->namelen,
offset, offset, DT_UNKNOWN) < 0)
return i;
filp->f_pos++;
}
......@@ -86,8 +80,8 @@ static ssize_t sdbfs_read(struct file *f, char __user *buf, size_t count,
ssize_t i, done;
inode = container_of(ino, struct sdbfs_inode, ino);
start = be64_to_cpu(inode->s_d.sdb_component.addr_first);
size = be64_to_cpu(inode->s_d.sdb_component.addr_last) + 1 - start;
start = be64_to_cpu(inode->info.s_d.sdb_component.addr_first);
size = be64_to_cpu(inode->info.s_d.sdb_component.addr_last) + 1 - start;
if (*offp > size)
return 0;
......@@ -128,18 +122,17 @@ static struct dentry *sdbfs_lookup(struct inode *dir,
{
struct inode *ino = NULL;
struct sdbfs_inode *inode = container_of(dir, struct sdbfs_inode, ino);
struct sdb_device *s_d;
struct sdbfs_info *info;
unsigned long inum = dir->i_ino & ~1;
int i, n, len;
n = be16_to_cpu(inode->s_i.sdb_records) - 1;
n = inode->nfiles;
len = dentry->d_name.len;
for (i = 0; i < n; i++) {
s_d = (struct sdb_device *)inode->files + i;
len = strlen(s_d->sdb_component.product.name);
if (len != dentry->d_name.len)
info = inode->files + i;
if (info->namelen != len)
continue;
if (!strncmp(s_d->sdb_component.product.name,
dentry->d_name.name, len))
if (!strncmp(info->name, dentry->d_name.name, len))
break;
}
if (i != n)
......@@ -186,9 +179,9 @@ static struct inode *sdbfs_iget(struct super_block *sb, int inum)
struct inode *ino;
struct sdbfs_dev *sd = sb->s_fs_info;
struct sdbfs_inode *inode;
struct sdbfs_info *info;
uint32_t offset;
int i, j, n, len;
uint8_t *s;
int type;
printk("%s: inum %i\n", __func__, inum);
......@@ -202,18 +195,18 @@ static struct inode *sdbfs_iget(struct super_block *sb, int inum)
offset = inum & ~1;
inode = container_of(ino, struct sdbfs_inode, ino);
n = sd->ops->read(sd, offset, &inode->s_d, SDB_SIZE);
n = sd->ops->read(sd, offset, &inode->info.s_d, SDB_SIZE);
if (n != SDB_SIZE)
return ERR_PTR(-EIO);
sdbfs_fix_endian(sd, &inode->s_d, SDB_SIZE);
sdbfs_fix_endian(sd, &inode->info.s_d, SDB_SIZE);
set_nlink(ino, 1);
ino->i_size = be64_to_cpu(inode->s_d.sdb_component.addr_last)
- be64_to_cpu(inode->s_d.sdb_component.addr_first) + 1;
ino->i_size = be64_to_cpu(inode->info.s_d.sdb_component.addr_last)
- be64_to_cpu(inode->info.s_d.sdb_component.addr_first) + 1;
ino->i_mtime.tv_sec = ino->i_atime.tv_sec = ino->i_ctime.tv_sec = 0;
ino->i_mtime.tv_nsec = ino->i_atime.tv_nsec = ino->i_ctime.tv_nsec = 0;
type = inode->s_d.sdb_component.product.record_type;
type = inode->info.s_d.sdb_component.product.record_type;
switch (type) {
case sdb_type_interconnect:
printk("%s: interconnect\n", __func__);
......@@ -221,25 +214,33 @@ static struct inode *sdbfs_iget(struct super_block *sb, int inum)
ino->i_op = &sdbfs_dir_iops;
ino->i_fop = &sdbfs_dir_fops;
/* We are an interconnect, so read the other records too */
len = be16_to_cpu(inode->s_i.sdb_records) * SDB_SIZE;
inode->files = kmalloc(len, GFP_KERNEL);
BUG_ON(!inode->files);
inode->nfiles = be16_to_cpu(inode->info.s_i.sdb_records);
len = inode->nfiles * sizeof(*info);
inode->files = kzalloc(len, GFP_KERNEL);
if (!inode->files) {
/* FIXME: iput? */
return ERR_PTR(-ENOMEM);
}
/* FIXME: add dot and dotdot, and maybe named-dot */
n = sd->ops->read(sd, offset + SDB_SIZE, inode->files, len);
if (n != len)
return ERR_PTR(-EIO);
sdbfs_fix_endian(sd, inode->files, len);
for (i = 0; i < len / SDB_SIZE; i++) {
/* zero-terminate: the lost type is not a problem */
s = (struct sdb_device *)(inode->files)[i]
.sdb_component.product.name;
for (i = 0; i < inode->nfiles; i++) {
offset += SDB_SIZE;
info = inode->files + i;
n = sd->ops->read(sd, offset, &info->s_d, SDB_SIZE);
if (n != SDB_SIZE) {
/* FIXME: iput? */
kfree(inode->files);
return ERR_PTR(-EIO);
}
sdbfs_fix_endian(sd, &info->s_d, SDB_SIZE);
strncpy(info->name,
info->s_d.sdb_component.product.name, 19);
for (j = 19; j; j--) {
s[j] = '\0';
if (s[j-1] != ' ')
info->name[j] = '\0';
if (info->name[j-1] != ' ')
break;
}
info->namelen = j;
}
break;
......@@ -252,7 +253,7 @@ static struct inode *sdbfs_iget(struct super_block *sb, int inum)
case sdb_type_bridge:
printk("%s: bridge to %llx (unsupported yet)\n", __func__,
ntohll(inode->s_b.sdb_child));
ntohll(inode->info.s_b.sdb_child));
break;
default:
......
sdbfs/kernel/sdbfs-int.h
View file @ cac7505b
......@@ -12,13 +12,21 @@
#include <linux/fs.h>
#include <linux/sdb.h>
struct sdbfs_inode {
struct sdbfs_info {
/* unnamed union to save typing */
union {
struct sdb_device s_d;
struct sdb_interconnect s_i;
struct sdb_bridge s_b;
};
struct sdb_device *files; /* Only used for directories */
char name[20]; /* 19 + terminator */
int namelen;
};
struct sdbfs_inode {
struct sdbfs_info info;
int nfiles;
struct sdbfs_info *files; /* for directories */
struct inode ino;
};
......
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