affs: Implement show_options
Implement the show_options superblock op for affs as part of a bid to get rid of s_options and generic_show_options() to make it easier to implement a context-based mount where the mount options can be passed individually over a file descriptor. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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26a7655e6a
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@ -20,9 +20,11 @@
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#include <linux/slab.h>
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#include <linux/writeback.h>
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#include <linux/blkdev.h>
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#include <linux/seq_file.h>
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#include "affs.h"
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static int affs_statfs(struct dentry *dentry, struct kstatfs *buf);
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static int affs_show_options(struct seq_file *m, struct dentry *root);
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static int affs_remount (struct super_block *sb, int *flags, char *data);
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static void
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@ -159,7 +161,7 @@ static const struct super_operations affs_sops = {
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.sync_fs = affs_sync_fs,
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.statfs = affs_statfs,
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.remount_fs = affs_remount,
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.show_options = generic_show_options,
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.show_options = affs_show_options,
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};
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enum {
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@ -293,6 +295,40 @@ parse_options(char *options, kuid_t *uid, kgid_t *gid, int *mode, int *reserved,
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return 1;
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}
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static int affs_show_options(struct seq_file *m, struct dentry *root)
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{
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struct super_block *sb = root->d_sb;
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struct affs_sb_info *sbi = AFFS_SB(sb);
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if (sb->s_blocksize)
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seq_printf(m, ",bs=%lu", sb->s_blocksize);
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if (affs_test_opt(sbi->s_flags, SF_SETMODE))
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seq_printf(m, ",mode=%o", sbi->s_mode);
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if (affs_test_opt(sbi->s_flags, SF_MUFS))
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seq_puts(m, ",mufs");
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if (affs_test_opt(sbi->s_flags, SF_NO_TRUNCATE))
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seq_puts(m, ",nofilenametruncate");
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if (affs_test_opt(sbi->s_flags, SF_PREFIX))
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seq_printf(m, ",prefix=%s", sbi->s_prefix);
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if (affs_test_opt(sbi->s_flags, SF_IMMUTABLE))
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seq_puts(m, ",protect");
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if (sbi->s_reserved != 2)
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seq_printf(m, ",reserved=%u", sbi->s_reserved);
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if (sbi->s_root_block != (sbi->s_reserved + sbi->s_partition_size - 1) / 2)
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seq_printf(m, ",root=%u", sbi->s_root_block);
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if (affs_test_opt(sbi->s_flags, SF_SETGID))
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seq_printf(m, ",setgid=%u",
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from_kgid_munged(&init_user_ns, sbi->s_gid));
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if (affs_test_opt(sbi->s_flags, SF_SETUID))
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seq_printf(m, ",setuid=%u",
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from_kuid_munged(&init_user_ns, sbi->s_uid));
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if (affs_test_opt(sbi->s_flags, SF_VERBOSE))
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seq_puts(m, ",verbose");
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if (sbi->s_volume[0])
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seq_printf(m, ",volume=%s", sbi->s_volume);
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return 0;
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}
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/* This function definitely needs to be split up. Some fine day I'll
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* hopefully have the guts to do so. Until then: sorry for the mess.
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*/
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@ -316,8 +352,6 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
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u8 sig[4];
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int ret;
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save_mount_options(sb, data);
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pr_debug("read_super(%s)\n", data ? (const char *)data : "no options");
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sb->s_magic = AFFS_SUPER_MAGIC;
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@ -548,8 +582,6 @@ affs_remount(struct super_block *sb, int *flags, char *data)
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}
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flush_delayed_work(&sbi->sb_work);
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if (new_opts)
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replace_mount_options(sb, new_opts);
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sbi->s_flags = mount_flags;
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sbi->s_mode = mode;
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