Mercurial > hg > nginx
comparison src/os/unix/ngx_files.h @ 7669:52b34c3f89b4
Too large st_blocks values are now ignored (ticket #157).
With XFS, using "allocsize=64m" mount option results in large preallocation
being reported in the st_blocks as returned by fstat() till the file is
closed. This in turn results in incorrect cache size calculations and
wrong clearing based on max_size.
To avoid too aggressive cache clearing on such volumes, st_blocks values
which result in sizes larger than st_size and eight blocks (an arbitrary
limit) are no longer trusted, and we use st_size instead.
The ngx_de_fs_size() counterpart is intentionally not modified, as
it is used on closed files and hence not affected by this problem.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Mon, 22 Jun 2020 18:02:59 +0300 |
parents | 061ec464813f |
children | ccb5ff87ab3e |
comparison
equal
deleted
inserted
replaced
7668:0a04e5e4c40b | 7669:52b34c3f89b4 |
---|---|
183 #define ngx_is_file(sb) (S_ISREG((sb)->st_mode)) | 183 #define ngx_is_file(sb) (S_ISREG((sb)->st_mode)) |
184 #define ngx_is_link(sb) (S_ISLNK((sb)->st_mode)) | 184 #define ngx_is_link(sb) (S_ISLNK((sb)->st_mode)) |
185 #define ngx_is_exec(sb) (((sb)->st_mode & S_IXUSR) == S_IXUSR) | 185 #define ngx_is_exec(sb) (((sb)->st_mode & S_IXUSR) == S_IXUSR) |
186 #define ngx_file_access(sb) ((sb)->st_mode & 0777) | 186 #define ngx_file_access(sb) ((sb)->st_mode & 0777) |
187 #define ngx_file_size(sb) (sb)->st_size | 187 #define ngx_file_size(sb) (sb)->st_size |
188 #define ngx_file_fs_size(sb) ngx_max((sb)->st_size, (sb)->st_blocks * 512) | 188 #define ngx_file_fs_size(sb) \ |
189 (((sb)->st_blocks * 512 > (sb)->st_size \ | |
190 && (sb)->st_blocks * 512 < (sb)->st_size + 8 * (sb)->st_blksize) \ | |
191 ? (sb)->st_blocks * 512 : (sb)->st_size) | |
189 #define ngx_file_mtime(sb) (sb)->st_mtime | 192 #define ngx_file_mtime(sb) (sb)->st_mtime |
190 #define ngx_file_uniq(sb) (sb)->st_ino | 193 #define ngx_file_uniq(sb) (sb)->st_ino |
191 | 194 |
192 | 195 |
193 ngx_int_t ngx_create_file_mapping(ngx_file_mapping_t *fm); | 196 ngx_int_t ngx_create_file_mapping(ngx_file_mapping_t *fm); |