diff options
| author | Xavier Hernandez <xhernandez@datalab.es> | 2014-09-18 16:50:47 +0200 |
|---|---|---|
| committer | Vijay Bellur <vbellur@redhat.com> | 2014-09-23 22:46:58 -0700 |
| commit | c4440ab8c7417a3bcaadf1cb150476d5ff6a1325 (patch) | |
| tree | 531d308bb79b29826a7dd10ca607c076dbef4063 /xlators/cluster/ec/src/ec-data.h | |
| parent | 6fffc4eaf408cb9b0b2891404ee54f4ab1dd5e2e (diff) | |
ec: Add config information in an xattr
To simplify backward compatibility of the ec xlator when some
parameter or the implementation itself is changed, a new xattr
is added to each file with the configuration needed to recover
it.
The new attribute is called 'trusted.ec.config', and it's a 64-bit
value containing the following information:
8 bits: version of the config information (currently always 0)
8 bits: algorithm used to encode the file (currently always 0)
8 bits: size of the galois field (currently always 8)
8 bits: number of bricks
8 bits: redundancy
24 bits: chunk size (currently 512)
This new xattr could allow, in a future version, to have different
configurations per file.
This is a backport of http://review.gluster.org/8770/
Change-Id: I8c12d40ff546cc201fc66caa367484be3d48aeb4
BUG: 1140862
Signed-off-by: Xavier Hernandez <xhernandez@datalab.es>
Reviewed-on: http://review.gluster.org/8825
Reviewed-by: Dan Lambright <dlambrig@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
Diffstat (limited to 'xlators/cluster/ec/src/ec-data.h')
| -rw-r--r-- | xlators/cluster/ec/src/ec-data.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/xlators/cluster/ec/src/ec-data.h b/xlators/cluster/ec/src/ec-data.h index 71f047a9aba..49090933ade 100644 --- a/xlators/cluster/ec/src/ec-data.h +++ b/xlators/cluster/ec/src/ec-data.h @@ -25,6 +25,9 @@ #include "ec.h" +struct _ec_config; +typedef struct _ec_config ec_config_t; + struct _ec_fd; typedef struct _ec_fd ec_fd_t; @@ -53,6 +56,16 @@ typedef void (* ec_wind_f)(ec_t *, ec_fop_data_t *, int32_t); typedef int32_t (* ec_handler_f)(ec_fop_data_t *, int32_t); typedef void (* ec_resume_f)(ec_fop_data_t *, int32_t); +struct _ec_config +{ + uint32_t version; + uint8_t algorithm; + uint8_t gf_word_size; + uint8_t bricks; + uint8_t redundancy; + uint32_t chunk_size; +}; + struct _ec_fd { uintptr_t bad; @@ -184,6 +197,7 @@ struct _ec_fop_data uint64_t pre_size; uint64_t post_size; gf_lock_t lock; + ec_config_t config; uint32_t flags; uint32_t first; |