From mboxrd@z Thu Jan 1 00:00:00 1970 From: James Simmons Date: Thu, 27 Feb 2020 16:12:54 -0500 Subject: [lustre-devel] [PATCH 306/622] lustre: dne: add new dir hash type "space" In-Reply-To: <1582838290-17243-1-git-send-email-jsimmons@infradead.org> References: <1582838290-17243-1-git-send-email-jsimmons@infradead.org> Message-ID: <1582838290-17243-307-git-send-email-jsimmons@infradead.org> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lustre-devel@lists.lustre.org From: Lai Siyao Add a new hash type "space", if this is set on default LMV of a directory, its subdirs will be created on all MDTs with balanced space usage. * new hash type LMV_HASH_TYPE_SPACE. WC-bug-id: https://jira.whamcloud.com/browse/LU-11213 Lustre-commit: a24f61532927 ("LU-11213 dne: add new dir hash type "space"") Signed-off-by: Lai Siyao Reviewed-on: https://review.whamcloud.com/34358 Reviewed-by: Andreas Dilger Reviewed-by: Hongchao Zhang Signed-off-by: James Simmons --- include/uapi/linux/lustre/lustre_user.h | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) diff --git a/include/uapi/linux/lustre/lustre_user.h b/include/uapi/linux/lustre/lustre_user.h index dc39265..22a0144 100644 --- a/include/uapi/linux/lustre/lustre_user.h +++ b/include/uapi/linux/lustre/lustre_user.h @@ -650,12 +650,16 @@ enum lmv_hash_type { LMV_HASH_TYPE_UNKNOWN = 0, /* 0 is reserved for testing purpose */ LMV_HASH_TYPE_ALL_CHARS = 1, LMV_HASH_TYPE_FNV_1A_64 = 2, + LMV_HASH_TYPE_SPACE = 3, /* + * distribute subdirs among all MDTs + * with balanced space usage. + */ + LMV_HASH_TYPE_MAX, }; -#define LMV_HASH_TYPE_MAX LMV_HASH_TYPE_FNV_1A_64 + 1 - #define LMV_HASH_NAME_ALL_CHARS "all_char" #define LMV_HASH_NAME_FNV_1A_64 "fnv_1a_64" +#define LMV_HASH_NAME_SPACE "space" struct lustre_foreign_type { uint32_t lft_type; @@ -685,7 +689,7 @@ struct lmv_user_md_v1 { __u32 lum_stripe_count; /* dirstripe count */ __u32 lum_stripe_offset; /* MDT idx for default dirstripe */ __u32 lum_hash_type; /* Dir stripe policy */ - __u32 lum_type; /* LMV type: default or normal */ + __u32 lum_type; /* LMV type: default */ __u32 lum_padding1; __u32 lum_padding2; __u32 lum_padding3; @@ -703,6 +707,15 @@ static inline __u32 lmv_foreign_to_md_stripes(__u32 size) sizeof(struct lmv_user_mds_data); } +/* + * NB, historically default layout didn't set type, but use XATTR name to differ + * from normal layout, for backward compatibility, define LMV_TYPE_DEFAULT 0x0, + * and still use the same method. + */ +enum lmv_type { + LMV_TYPE_DEFAULT = 0x0000, +}; + static inline int lmv_user_md_size(int stripes, int lmm_magic) { int size = sizeof(struct lmv_user_md); -- 1.8.3.1