diff options
Diffstat (limited to 'toys/mke2fs.c')
| -rw-r--r-- | toys/mke2fs.c | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/toys/mke2fs.c b/toys/mke2fs.c index bf019567..bade3d22 100644 --- a/toys/mke2fs.c +++ b/toys/mke2fs.c @@ -30,6 +30,26 @@ #define INODES_RESERVED 10 +// Calculate data blocks plus index blocks needed to hold a file. +uint32_t blocks_used(uint64_t size) +{ + uint32_t dblocks = (uint32_t)((size+(TT.blocksize-1))/TT.blocksize); + uint32_t idx=TT.blocksize/4, iblocks=0, diblocks=0, tiblocks=0; + + // Account for direct, singly, doubly, and triply indiret index blocks + + if (dblocks > 12) { + iblocks = ((dblocks-13)/idx)+1; + if (iblocks > 1) { + diblocks = ((iblocks-2)/idx)+1; + if (diblocks > 1) + tiblocks = ((diblocks-2)/idx)+1; + } + } + + return dblocks + iblocks + diblocks + tiblocks; +} + // According to http://www.opengroup.org/onlinepubs/9629399/apdxa.htm // we should generate a uuid structure by reading a clock with 100 nanosecond // precision, normalizing it to the start of the gregorian calendar in 1582, @@ -187,7 +207,19 @@ int mke2fs_main(void) temp = O_RDWR|O_CREAT; } else temp = O_RDWR; - // TODO: collect gene2fs list/lost+found, calculate requirements. + // Collect gene2fs list or lost+found, calculate requirements. + + if (TT.gendir) { + strncpy(toybuf, TT.gendir, sizeof(toybuf)); + TT.dt = read_dirtree(toybuf, NULL); + } else { + TT.dt = xzalloc(sizeof(struct dirtree)+11); + strcpy(TT.dt->name, "lost+found"); + TT.dt->st.st_mode = S_IFDIR|0755; + TT.dt->st.st_ctime = TT.dt->st.st_mtime = time(NULL); + } + + // Calculate st_nlink for each node in tree. // TODO: Check if filesystem is mounted here |