This introduces a new error code, option_needs_open_fs, which is used to indicate that an attempt was made to parse a mount option prior to opening a filesystem, when that mount option requires an open filesystem in order to be validated.
Returning this error results in bch2_parse_one_mount_opt() saving that option for later parsing, after the filesystem is opened. Signed-off-by: Thomas Bertschinger <[email protected]> --- fs/bcachefs/disk_groups.c | 2 +- fs/bcachefs/errcode.h | 3 ++- fs/bcachefs/opts.c | 15 +++++++++++++++ 3 files changed, 18 insertions(+), 2 deletions(-) diff --git a/fs/bcachefs/disk_groups.c b/fs/bcachefs/disk_groups.c index 521a86df5e52..5df8de0b8c02 100644 --- a/fs/bcachefs/disk_groups.c +++ b/fs/bcachefs/disk_groups.c @@ -511,7 +511,7 @@ int bch2_opt_target_parse(struct bch_fs *c, const char *val, u64 *res, return -EINVAL; if (!c) - return 0; + return -BCH_ERR_option_needs_open_fs; if (!strlen(val) || !strcmp(val, "none")) { *res = 0; diff --git a/fs/bcachefs/errcode.h b/fs/bcachefs/errcode.h index 58612abf7927..a268af3e52bf 100644 --- a/fs/bcachefs/errcode.h +++ b/fs/bcachefs/errcode.h @@ -257,7 +257,8 @@ x(BCH_ERR_nopromote, nopromote_no_writes) \ x(BCH_ERR_nopromote, nopromote_enomem) \ x(0, need_inode_lock) \ - x(0, invalid_snapshot_node) + x(0, invalid_snapshot_node) \ + x(0, option_needs_open_fs) enum bch_errcode { BCH_ERR_START = 2048, diff --git a/fs/bcachefs/opts.c b/fs/bcachefs/opts.c index e794706276cf..e10fc1da71b1 100644 --- a/fs/bcachefs/opts.c +++ b/fs/bcachefs/opts.c @@ -378,6 +378,10 @@ int bch2_opt_parse(struct bch_fs *c, break; case BCH_OPT_FN: ret = opt->fn.parse(c, val, res, err); + + if (ret == -BCH_ERR_option_needs_open_fs) + return ret; + if (ret < 0) { if (err) prt_printf(err, "%s: parse error", @@ -495,6 +499,17 @@ int bch2_parse_one_mount_opt(struct bch_fs *c, struct bch_opts *opts, goto bad_opt; ret = bch2_opt_parse(c, &bch2_opt_table[id], val, &v, &err); + if (ret == -BCH_ERR_option_needs_open_fs && parse_later) { + prt_printf(parse_later, "%s=%s,", name, val); + if (parse_later->allocation_failure) { + ret = -ENOMEM; + goto out; + } + + ret = 0; + goto out; + } + if (ret < 0) goto bad_val; -- 2.45.0
