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freevxfs: Convert freevxfs to the new mount API.
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Convert the freevxfs filesystem to the new mount API.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Link: https://lore.kernel.org/r/b0d1a423-4b8e-4bc1-a021-a1078aee915f@redhat.com
Tested-by: Krzysztof Błaszkowski <kb@sysmikro.com.pl>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Eric Sandeen authored and Christian Brauner committed Mar 26, 2024
1 parent 491681d commit b01e1a6
Showing 1 changed file with 40 additions and 29 deletions.
69 changes: 40 additions & 29 deletions fs/freevxfs/vxfs_super.c
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Original file line number Diff line number Diff line change
Expand Up @@ -17,7 +17,7 @@
#include <linux/slab.h>
#include <linux/stat.h>
#include <linux/vfs.h>
#include <linux/mount.h>
#include <linux/fs_context.h>

#include "vxfs.h"
#include "vxfs_extern.h"
Expand Down Expand Up @@ -91,10 +91,10 @@ vxfs_statfs(struct dentry *dentry, struct kstatfs *bufp)
return 0;
}

static int vxfs_remount(struct super_block *sb, int *flags, char *data)
static int vxfs_reconfigure(struct fs_context *fc)
{
sync_filesystem(sb);
*flags |= SB_RDONLY;
sync_filesystem(fc->root->d_sb);
fc->sb_flags |= SB_RDONLY;
return 0;
}

Expand All @@ -120,24 +120,24 @@ static const struct super_operations vxfs_super_ops = {
.evict_inode = vxfs_evict_inode,
.put_super = vxfs_put_super,
.statfs = vxfs_statfs,
.remount_fs = vxfs_remount,
};

static int vxfs_try_sb_magic(struct super_block *sbp, int silent,
static int vxfs_try_sb_magic(struct super_block *sbp, struct fs_context *fc,
unsigned blk, __fs32 magic)
{
struct buffer_head *bp;
struct vxfs_sb *rsbp;
struct vxfs_sb_info *infp = VXFS_SBI(sbp);
int silent = fc->sb_flags & SB_SILENT;
int rc = -ENOMEM;

bp = sb_bread(sbp, blk);
do {
if (!bp || !buffer_mapped(bp)) {
if (!silent) {
printk(KERN_WARNING
"vxfs: unable to read disk superblock at %u\n",
blk);
warnf(fc,
"vxfs: unable to read disk superblock at %u",
blk);
}
break;
}
Expand All @@ -146,9 +146,9 @@ static int vxfs_try_sb_magic(struct super_block *sbp, int silent,
rsbp = (struct vxfs_sb *)bp->b_data;
if (rsbp->vs_magic != magic) {
if (!silent)
printk(KERN_NOTICE
"vxfs: WRONG superblock magic %08x at %u\n",
rsbp->vs_magic, blk);
infof(fc,
"vxfs: WRONG superblock magic %08x at %u",
rsbp->vs_magic, blk);
break;
}

Expand All @@ -169,8 +169,7 @@ static int vxfs_try_sb_magic(struct super_block *sbp, int silent,
/**
* vxfs_fill_super - read superblock into memory and initialize filesystem
* @sbp: VFS superblock (to fill)
* @dp: fs private mount data
* @silent: do not complain loudly when sth is wrong
* @fc: filesytem context
*
* Description:
* We are called on the first mount of a filesystem to read the
Expand All @@ -182,26 +181,27 @@ static int vxfs_try_sb_magic(struct super_block *sbp, int silent,
* Locking:
* We are under @sbp->s_lock.
*/
static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
static int vxfs_fill_super(struct super_block *sbp, struct fs_context *fc)
{
struct vxfs_sb_info *infp;
struct vxfs_sb *rsbp;
u_long bsize;
struct inode *root;
int ret = -EINVAL;
int silent = fc->sb_flags & SB_SILENT;
u32 j;

sbp->s_flags |= SB_RDONLY;

infp = kzalloc(sizeof(*infp), GFP_KERNEL);
if (!infp) {
printk(KERN_WARNING "vxfs: unable to allocate incore superblock\n");
warnf(fc, "vxfs: unable to allocate incore superblock");
return -ENOMEM;
}

bsize = sb_min_blocksize(sbp, BLOCK_SIZE);
if (!bsize) {
printk(KERN_WARNING "vxfs: unable to set blocksize\n");
warnf(fc, "vxfs: unable to set blocksize");
goto out;
}

Expand All @@ -210,24 +210,24 @@ static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
sbp->s_time_min = 0;
sbp->s_time_max = U32_MAX;

if (!vxfs_try_sb_magic(sbp, silent, 1,
if (!vxfs_try_sb_magic(sbp, fc, 1,
(__force __fs32)cpu_to_le32(VXFS_SUPER_MAGIC))) {
/* Unixware, x86 */
infp->byte_order = VXFS_BO_LE;
} else if (!vxfs_try_sb_magic(sbp, silent, 8,
} else if (!vxfs_try_sb_magic(sbp, fc, 8,
(__force __fs32)cpu_to_be32(VXFS_SUPER_MAGIC))) {
/* HP-UX, parisc */
infp->byte_order = VXFS_BO_BE;
} else {
if (!silent)
printk(KERN_NOTICE "vxfs: can't find superblock.\n");
infof(fc, "vxfs: can't find superblock.");
goto out;
}

rsbp = infp->vsi_raw;
j = fs32_to_cpu(infp, rsbp->vs_version);
if ((j < 2 || j > 4) && !silent) {
printk(KERN_NOTICE "vxfs: unsupported VxFS version (%d)\n", j);
infof(fc, "vxfs: unsupported VxFS version (%d)", j);
goto out;
}

Expand All @@ -244,17 +244,17 @@ static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)

j = fs32_to_cpu(infp, rsbp->vs_bsize);
if (!sb_set_blocksize(sbp, j)) {
printk(KERN_WARNING "vxfs: unable to set final block size\n");
warnf(fc, "vxfs: unable to set final block size");
goto out;
}

if (vxfs_read_olt(sbp, bsize)) {
printk(KERN_WARNING "vxfs: unable to read olt\n");
warnf(fc, "vxfs: unable to read olt");
goto out;
}

if (vxfs_read_fshead(sbp)) {
printk(KERN_WARNING "vxfs: unable to read fshead\n");
warnf(fc, "vxfs: unable to read fshead");
goto out;
}

Expand All @@ -265,7 +265,7 @@ static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
}
sbp->s_root = d_make_root(root);
if (!sbp->s_root) {
printk(KERN_WARNING "vxfs: unable to get root dentry.\n");
warnf(fc, "vxfs: unable to get root dentry.");
goto out_free_ilist;
}

Expand All @@ -284,18 +284,29 @@ static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
/*
* The usual module blurb.
*/
static struct dentry *vxfs_mount(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data)
static int vxfs_get_tree(struct fs_context *fc)
{
return mount_bdev(fs_type, flags, dev_name, data, vxfs_fill_super);
return get_tree_bdev(fc, vxfs_fill_super);
}

static const struct fs_context_operations vxfs_context_ops = {
.get_tree = vxfs_get_tree,
.reconfigure = vxfs_reconfigure,
};

static int vxfs_init_fs_context(struct fs_context *fc)
{
fc->ops = &vxfs_context_ops;

return 0;
}

static struct file_system_type vxfs_fs_type = {
.owner = THIS_MODULE,
.name = "vxfs",
.mount = vxfs_mount,
.kill_sb = kill_block_super,
.fs_flags = FS_REQUIRES_DEV,
.init_fs_context = vxfs_init_fs_context,
};
MODULE_ALIAS_FS("vxfs"); /* makes mount -t vxfs autoload the module */
MODULE_ALIAS("vxfs");
Expand Down

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