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vfs: check i_nlink limits in vfs_{mkdir,rename_dir,link}

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New field of struct super_block - ->s_max_links.  Maximal allowed
value of ->i_nlink or 0; in the latter case all checks still need
to be done in ->link/->mkdir/->rename instances.  Note that this
limit applies both to directoris and to non-directories.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2012-02-06 12:45:27 -05:00
parent c16fa4f2ad
commit 8de5277879
26 changed files with 46 additions and 149 deletions
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fs/minix/minix.h
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@ -34,7 +34,6 @@ struct minix_sb_info {
unsigned long s_max_size;
int s_dirsize;
int s_namelen;
int s_link_max;
struct buffer_head ** s_imap;
struct buffer_head ** s_zmap;
struct buffer_head * s_sbh;