diff options
Diffstat (limited to 'fs/afs/internal.h')
| -rw-r--r-- | fs/afs/internal.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/fs/afs/internal.h b/fs/afs/internal.h index 81b0485fd22a..0d150a29e39e 100644 --- a/fs/afs/internal.h +++ b/fs/afs/internal.h @@ -755,6 +755,7 @@ struct afs_vnode_param { bool update_ctime:1; /* Need to update the ctime */ bool set_size:1; /* Must update i_size */ bool op_unlinked:1; /* True if file was unlinked by op */ + bool speculative:1; /* T if speculative status fetch (no vnode lock) */ }; /* @@ -812,6 +813,7 @@ struct afs_operation { pgoff_t last; /* last page in mapping to deal with */ unsigned first_offset; /* offset into mapping[first] */ unsigned last_to; /* amount of mapping[last] */ + bool laundering; /* Laundering page, PG_writeback not set */ } store; struct { struct iattr *attr; @@ -857,6 +859,62 @@ struct afs_vnode_cache_aux { u64 data_version; } __packed; +/* + * We use page->private to hold the amount of the page that we've written to, + * splitting the field into two parts. However, we need to represent a range + * 0...PAGE_SIZE, so we reduce the resolution if the size of the page + * exceeds what we can encode. + */ +#ifdef CONFIG_64BIT +#define __AFS_PAGE_PRIV_MASK 0x7fffffffUL +#define __AFS_PAGE_PRIV_SHIFT 32 +#define __AFS_PAGE_PRIV_MMAPPED 0x80000000UL +#else +#define __AFS_PAGE_PRIV_MASK 0x7fffUL +#define __AFS_PAGE_PRIV_SHIFT 16 +#define __AFS_PAGE_PRIV_MMAPPED 0x8000UL +#endif + +static inline unsigned int afs_page_dirty_resolution(void) +{ + int shift = PAGE_SHIFT - (__AFS_PAGE_PRIV_SHIFT - 1); + return (shift > 0) ? shift : 0; +} + +static inline size_t afs_page_dirty_from(unsigned long priv) +{ + unsigned long x = priv & __AFS_PAGE_PRIV_MASK; + + /* The lower bound is inclusive */ + return x << afs_page_dirty_resolution(); +} + +static inline size_t afs_page_dirty_to(unsigned long priv) +{ + unsigned long x = (priv >> __AFS_PAGE_PRIV_SHIFT) & __AFS_PAGE_PRIV_MASK; + + /* The upper bound is immediately beyond the region */ + return (x + 1) << afs_page_dirty_resolution(); +} + +static inline unsigned long afs_page_dirty(size_t from, size_t to) +{ + unsigned int res = afs_page_dirty_resolution(); + from >>= res; + to = (to - 1) >> res; + return (to << __AFS_PAGE_PRIV_SHIFT) | from; +} + +static inline unsigned long afs_page_dirty_mmapped(unsigned long priv) +{ + return priv | __AFS_PAGE_PRIV_MMAPPED; +} + +static inline bool afs_is_page_dirty_mmapped(unsigned long priv) +{ + return priv & __AFS_PAGE_PRIV_MMAPPED; +} + #include <trace/events/afs.h> /*****************************************************************************/ |