Btrfs: show subvol= and subvolid= in /proc/mounts
Now that we're guaranteed to have a meaningful root dentry, we can just export seq_dentry() and use it in btrfs_show_options(). The subvolume ID is easy to get and can also be useful, so put that in there, too. Reviewed-by: David Sterba <dsterba@suse.cz> Signed-off-by: Omar Sandoval <osandov@osandov.com> Signed-off-by: Chris Mason <clm@fb.com>
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@ -1188,6 +1188,10 @@ static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry)
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seq_puts(seq, ",fatal_errors=panic");
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seq_puts(seq, ",fatal_errors=panic");
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if (info->commit_interval != BTRFS_DEFAULT_COMMIT_INTERVAL)
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if (info->commit_interval != BTRFS_DEFAULT_COMMIT_INTERVAL)
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seq_printf(seq, ",commit=%d", info->commit_interval);
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seq_printf(seq, ",commit=%d", info->commit_interval);
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seq_printf(seq, ",subvolid=%llu",
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BTRFS_I(d_inode(dentry))->root->root_key.objectid);
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seq_puts(seq, ",subvol=");
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seq_dentry(seq, dentry, " \t\n\\");
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return 0;
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return 0;
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}
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}
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@ -538,6 +538,7 @@ int seq_dentry(struct seq_file *m, struct dentry *dentry, const char *esc)
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return res;
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return res;
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}
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}
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EXPORT_SYMBOL(seq_dentry);
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static void *single_start(struct seq_file *p, loff_t *pos)
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static void *single_start(struct seq_file *p, loff_t *pos)
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{
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{
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