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| author | Michael Halcrow <mhalcrow@us.ibm.com> | 2007-10-16 12:28:05 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 20:43:12 +0400 |
| commit | 45eaab79678b9e27e08f0cf250eb2df9d6a48df0 (patch) | |
| tree | ff13018aa1d66f1b1d9abbba6df7a361518bacb7 /fs/ecryptfs/crypto.c | |
| parent | e9f6a99cb844a61b04cab5b82e333d6efef1f735 (diff) | |
| download | linux-45eaab79678b9e27e08f0cf250eb2df9d6a48df0.tar.xz | |
eCryptfs: remove header_extent_size
There is no point to keeping a separate header_extent_size and an extent_size.
The total size of the header can always be represented as some multiple of
the regular data extent size.
[randy.dunlap@oracle.com: ecryptfs: fix printk format warning]
Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ecryptfs/crypto.c')
| -rw-r--r-- | fs/ecryptfs/crypto.c | 40 |
1 files changed, 20 insertions, 20 deletions
diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c index 8e9b36df7881..9127b809044d 100644 --- a/fs/ecryptfs/crypto.c +++ b/fs/ecryptfs/crypto.c @@ -366,8 +366,8 @@ ecryptfs_extent_to_lwr_pg_idx_and_offset(unsigned long *lower_page_idx, int extents_per_page; bytes_occupied_by_headers_at_front = - ( crypt_stat->header_extent_size - * crypt_stat->num_header_extents_at_front ); + (crypt_stat->extent_size + * crypt_stat->num_header_extents_at_front); extents_occupied_by_headers_at_front = ( bytes_occupied_by_headers_at_front / crypt_stat->extent_size ); @@ -376,8 +376,8 @@ ecryptfs_extent_to_lwr_pg_idx_and_offset(unsigned long *lower_page_idx, (*lower_page_idx) = lower_extent_num / extents_per_page; extent_offset = lower_extent_num % extents_per_page; (*byte_offset) = extent_offset * crypt_stat->extent_size; - ecryptfs_printk(KERN_DEBUG, " * crypt_stat->header_extent_size = " - "[%d]\n", crypt_stat->header_extent_size); + ecryptfs_printk(KERN_DEBUG, " * crypt_stat->extent_size = " + "[%d]\n", crypt_stat->extent_size); ecryptfs_printk(KERN_DEBUG, " * crypt_stat->" "num_header_extents_at_front = [%d]\n", crypt_stat->num_header_extents_at_front); @@ -899,15 +899,17 @@ void ecryptfs_set_default_sizes(struct ecryptfs_crypt_stat *crypt_stat) crypt_stat->extent_size = ECRYPTFS_DEFAULT_EXTENT_SIZE; set_extent_mask_and_shift(crypt_stat); crypt_stat->iv_bytes = ECRYPTFS_DEFAULT_IV_BYTES; - if (PAGE_CACHE_SIZE <= ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE) { - crypt_stat->header_extent_size = - ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE; - } else - crypt_stat->header_extent_size = PAGE_CACHE_SIZE; if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR) crypt_stat->num_header_extents_at_front = 0; - else - crypt_stat->num_header_extents_at_front = 1; + else { + if (PAGE_CACHE_SIZE <= ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE) + crypt_stat->num_header_extents_at_front = + (ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE + / crypt_stat->extent_size); + else + crypt_stat->num_header_extents_at_front = + (PAGE_CACHE_SIZE / crypt_stat->extent_size); + } } /** @@ -1319,7 +1321,7 @@ ecryptfs_write_header_metadata(char *virt, u32 header_extent_size; u16 num_header_extents_at_front; - header_extent_size = (u32)crypt_stat->header_extent_size; + header_extent_size = (u32)crypt_stat->extent_size; num_header_extents_at_front = (u16)crypt_stat->num_header_extents_at_front; header_extent_size = cpu_to_be32(header_extent_size); @@ -1415,7 +1417,7 @@ ecryptfs_write_metadata_to_contents(struct ecryptfs_crypt_stat *crypt_stat, set_fs(oldfs); goto out; } - header_pages = ((crypt_stat->header_extent_size + header_pages = ((crypt_stat->extent_size * crypt_stat->num_header_extents_at_front) / PAGE_CACHE_SIZE); memset(page_virt, 0, PAGE_CACHE_SIZE); @@ -1532,17 +1534,16 @@ static int parse_header_metadata(struct ecryptfs_crypt_stat *crypt_stat, virt += 4; memcpy(&num_header_extents_at_front, virt, 2); num_header_extents_at_front = be16_to_cpu(num_header_extents_at_front); - crypt_stat->header_extent_size = (int)header_extent_size; crypt_stat->num_header_extents_at_front = (int)num_header_extents_at_front; - (*bytes_read) = 6; + (*bytes_read) = (sizeof(u32) + sizeof(u16)); if ((validate_header_size == ECRYPTFS_VALIDATE_HEADER_SIZE) - && ((crypt_stat->header_extent_size + && ((crypt_stat->extent_size * crypt_stat->num_header_extents_at_front) < ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE)) { rc = -EINVAL; - ecryptfs_printk(KERN_WARNING, "Invalid header extent size: " - "[%d]\n", crypt_stat->header_extent_size); + printk(KERN_WARNING "Invalid number of header extents: [%zd]\n", + crypt_stat->num_header_extents_at_front); } return rc; } @@ -1557,8 +1558,7 @@ static int parse_header_metadata(struct ecryptfs_crypt_stat *crypt_stat, */ static void set_default_header_data(struct ecryptfs_crypt_stat *crypt_stat) { - crypt_stat->header_extent_size = 4096; - crypt_stat->num_header_extents_at_front = 1; + crypt_stat->num_header_extents_at_front = 2; } /** |