[PATCH -V8 6/9] ext4: Add get_fsid callback
in [Kernel]
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From: Aneesh Kumar K.V on 17 May 2010 01:40 Acked-by: Serge Hallyn <serue(a)us.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar(a)linux.vnet.ibm.com> --- fs/ext4/super.c | 15 +++++++++++++++ 1 files changed, 15 insertions(+), 0 deletions(-) diff --git a/fs/ext4/super.c b/fs/ext4/super.c index e14d22c..fc7d464 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -1049,6 +1049,19 @@ static int bdev_try_to_free_page(struct super_block *sb, struct page *page, return try_to_free_buffers(page); } +static int ext4_get_fsid(struct super_block *sb, struct uuid *fsid) +{ + struct ext4_sb_info *sbi = EXT4_SB(sb); + struct ext4_super_block *es = sbi->s_es; + + memcpy(fsid->uuid, es->s_uuid, sizeof(fsid->uuid)); + /* + * We may want to make sure we return error if the s_uuid is not + * exactly unique + */ + return 0; +} + #ifdef CONFIG_QUOTA #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) @@ -1109,6 +1122,7 @@ static const struct super_operations ext4_sops = { .quota_write = ext4_quota_write, #endif .bdev_try_to_free_page = bdev_try_to_free_page, + .get_fsid = ext4_get_fsid, }; static const struct super_operations ext4_nojournal_sops = { @@ -1128,6 +1142,7 @@ static const struct super_operations ext4_nojournal_sops = { .quota_write = ext4_quota_write, #endif .bdev_try_to_free_page = bdev_try_to_free_page, + .get_fsid = ext4_get_fsid, }; static const struct export_operations ext4_export_ops = { -- 1.7.1.78.g212f0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |