diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-01-15 03:03:17 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-01-21 23:44:31 +0300 |
commit | 7a51ed66f653c248993b3c4a61932e47933d835e (patch) | |
tree | eb40e8e3b00979deee24e0a03a32b5f25d1f275e /cache.h | |
parent | ce33288ea6b81a2f4f5aecd72177bcc8174562ae (diff) |
Make on-disk index representation separate from in-core one
This converts the index explicitly on read and write to its on-disk
format, allowing the in-core format to contain more flags, and be
simpler.
In particular, the in-core format is now host-endian (as opposed to the
on-disk one that is network endian in order to be able to be shared
across machines) and as a result we can dispense with all the
htonl/ntohl on accesses to the cache_entry fields.
This will make it easier to make use of various temporary flags that do
not exist in the on-disk format.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'cache.h')
-rw-r--r-- | cache.h | 46 |
1 files changed, 32 insertions, 14 deletions
@@ -94,48 +94,66 @@ struct cache_time { * We save the fields in big-endian order to allow using the * index file over NFS transparently. */ +struct ondisk_cache_entry { + struct cache_time ctime; + struct cache_time mtime; + unsigned int dev; + unsigned int ino; + unsigned int mode; + unsigned int uid; + unsigned int gid; + unsigned int size; + unsigned char sha1[20]; + unsigned short flags; + char name[FLEX_ARRAY]; /* more */ +}; + struct cache_entry { - struct cache_time ce_ctime; - struct cache_time ce_mtime; + unsigned int ce_ctime; + unsigned int ce_mtime; unsigned int ce_dev; unsigned int ce_ino; unsigned int ce_mode; unsigned int ce_uid; unsigned int ce_gid; unsigned int ce_size; + unsigned int ce_flags; unsigned char sha1[20]; - unsigned short ce_flags; char name[FLEX_ARRAY]; /* more */ }; #define CE_NAMEMASK (0x0fff) #define CE_STAGEMASK (0x3000) -#define CE_UPDATE (0x4000) #define CE_VALID (0x8000) #define CE_STAGESHIFT 12 -#define create_ce_flags(len, stage) htons((len) | ((stage) << CE_STAGESHIFT)) -#define ce_namelen(ce) (CE_NAMEMASK & ntohs((ce)->ce_flags)) +/* In-memory only */ +#define CE_UPDATE (0x10000) +#define CE_REMOVE (0x20000) + +#define create_ce_flags(len, stage) ((len) | ((stage) << CE_STAGESHIFT)) +#define ce_namelen(ce) (CE_NAMEMASK & (ce)->ce_flags) #define ce_size(ce) cache_entry_size(ce_namelen(ce)) -#define ce_stage(ce) ((CE_STAGEMASK & ntohs((ce)->ce_flags)) >> CE_STAGESHIFT) +#define ondisk_ce_size(ce) ondisk_cache_entry_size(ce_namelen(ce)) +#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT) #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644) static inline unsigned int create_ce_mode(unsigned int mode) { if (S_ISLNK(mode)) - return htonl(S_IFLNK); + return S_IFLNK; if (S_ISDIR(mode) || S_ISGITLINK(mode)) - return htonl(S_IFGITLINK); - return htonl(S_IFREG | ce_permissions(mode)); + return S_IFGITLINK; + return S_IFREG | ce_permissions(mode); } static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode) { extern int trust_executable_bit, has_symlinks; if (!has_symlinks && S_ISREG(mode) && - ce && S_ISLNK(ntohl(ce->ce_mode))) + ce && S_ISLNK(ce->ce_mode)) return ce->ce_mode; if (!trust_executable_bit && S_ISREG(mode)) { - if (ce && S_ISREG(ntohl(ce->ce_mode))) + if (ce && S_ISREG(ce->ce_mode)) return ce->ce_mode; return create_ce_mode(0666); } @@ -146,14 +164,14 @@ static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned in S_ISLNK(mode) ? S_IFLNK : S_ISDIR(mode) ? S_IFDIR : S_IFGITLINK) #define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7) +#define ondisk_cache_entry_size(len) ((offsetof(struct ondisk_cache_entry,name) + (len) + 8) & ~7) struct index_state { struct cache_entry **cache; unsigned int cache_nr, cache_alloc, cache_changed; struct cache_tree *cache_tree; time_t timestamp; - void *mmap; - size_t mmap_size; + void *alloc; }; extern struct index_state the_index; |