diff options
Diffstat (limited to 'fs/proc/scsi.c')
| -rw-r--r-- | fs/proc/scsi.c | 219 |
1 files changed, 0 insertions, 219 deletions
diff --git a/fs/proc/scsi.c b/fs/proc/scsi.c deleted file mode 100644 index 679fa383f..000000000 --- a/fs/proc/scsi.c +++ /dev/null @@ -1,219 +0,0 @@ -/* - * linux/fs/proc/scsi.c - * (c) 1995 Michael Neuffer neuffer@goofy.zdv.uni-mainz.de - * - * The original version was derived from linux/fs/proc/net.c, - * which is Copyright (C) 1991, 1992 Linus Torvalds. - * Much has been rewritten, but some of the code still remains. - * - * /proc/scsi directory handling functions - * - * last change: 95/07/04 - * - * Initial version: March '95 - * 95/05/15 Added subdirectories for each driver and show every - * registered HBA as a single file. - * 95/05/30 Added rudimentary write support for parameter passing - * 95/07/04 Fixed bugs in directory handling - * 95/09/13 Update to support the new proc-dir tree - * - * TODO: Improve support to write to the driver files - * Add some more comments - */ -#include <linux/errno.h> -#include <linux/sched.h> -#include <linux/proc_fs.h> -#include <linux/stat.h> -#include <linux/mm.h> - -#include <asm/uaccess.h> - -/* forward references */ -static ssize_t proc_readscsi(struct file * file, char * buf, - size_t count, loff_t *ppos); -static ssize_t proc_writescsi(struct file * file, const char * buf, - size_t count, loff_t *ppos); -static long long proc_scsilseek(struct file *, long long, int); - -extern void build_proc_dir_hba_entries(uint); - -/* the *_get_info() functions are in the respective scsi driver code */ -int (* dispatch_scsi_info_ptr) (int ino, char *buffer, char **start, - off_t offset, int length, int inout) = 0; - -static struct file_operations proc_scsi_operations = { - proc_scsilseek, /* lseek */ - proc_readscsi, /* read */ - proc_writescsi, /* write */ - proc_readdir, /* readdir */ - NULL, /* poll */ - NULL, /* ioctl */ - NULL, /* mmap */ - NULL, /* no special open code */ - NULL, /* flush */ - NULL, /* no special release code */ - NULL /* can't fsync */ -}; - -/* - * proc directories can do almost nothing.. - */ -struct inode_operations proc_scsi_inode_operations = { -&proc_scsi_operations, /* default scsi directory file-ops */ - NULL, /* create */ - proc_lookup, /* lookup */ - NULL, /* link */ - NULL, /* unlink */ - NULL, /* symlink */ - NULL, /* mkdir */ - NULL, /* rmdir */ - NULL, /* mknod */ - NULL, /* rename */ - NULL, /* readlink */ - NULL, /* follow_link */ - NULL, /* get_block */ - NULL, /* readpage */ - NULL, /* writepage */ - NULL, /* flushpage */ - NULL, /* truncate */ - NULL, /* permission */ - NULL, /* smap */ - NULL /* revalidate */ -}; - -int get_not_present_info(char *buffer, char **start, off_t offset, int length) -{ - int len, pos, begin; - - begin = 0; - pos = len = sprintf(buffer, - "No low-level scsi modules are currently present\n"); - if(pos < offset) { - len = 0; - begin = pos; - } - - *start = buffer + (offset - begin); /* Start of wanted data */ - len -= (offset - begin); - if(len > length) - len = length; - - return(len); -} - -#define PROC_BLOCK_SIZE (3*1024) /* 4K page size, but our output routines - * use some slack for overruns - */ - -static ssize_t proc_readscsi(struct file * file, char * buf, - size_t count, loff_t *ppos) -{ - struct inode * inode = file->f_dentry->d_inode; - ssize_t length; - ssize_t bytes = count; - ssize_t copied = 0; - ssize_t thistime; - char * page; - char * start; - - if (!(page = (char *) __get_free_page(GFP_KERNEL))) - return(-ENOMEM); - - while (bytes > 0) { - thistime = bytes; - if(bytes > PROC_BLOCK_SIZE) - thistime = PROC_BLOCK_SIZE; - - if(dispatch_scsi_info_ptr) - length = dispatch_scsi_info_ptr(inode->i_ino, page, &start, - *ppos, thistime, 0); - else - length = get_not_present_info(page, &start, *ppos, thistime); - if(length < 0) { - free_page((ulong) page); - return(length); - } - - /* - * We have been given a non page aligned block of - * the data we asked for + a bit. We have been given - * the start pointer and we know the length.. - */ - if (length <= 0) - break; - /* - * Copy the bytes - */ - copy_to_user(buf + copied, start, length); - *ppos += length; /* Move down the file */ - bytes -= length; - copied += length; - - if(length < thistime) - break; /* End of file */ - - } - - free_page((ulong) page); - return(copied); -} - - -static ssize_t proc_writescsi(struct file * file, const char * buf, - size_t count, loff_t *ppos) -{ - struct inode * inode = file->f_dentry->d_inode; - ssize_t ret = 0; - char * page; - - if(count > PROC_BLOCK_SIZE) { - return(-EOVERFLOW); - } - - if(dispatch_scsi_info_ptr != NULL) { - if (!(page = (char *) __get_free_page(GFP_KERNEL))) - return(-ENOMEM); - copy_from_user(page, buf, count); - ret = dispatch_scsi_info_ptr(inode->i_ino, page, 0, 0, count, 1); - } else - return(-ENOPKG); /* Nothing here */ - - free_page((ulong) page); - return(ret); -} - - -static long long proc_scsilseek(struct file * file, long long offset, int orig) -{ - switch (orig) { - case 0: - file->f_pos = offset; - return(file->f_pos); - case 1: - file->f_pos += offset; - return(file->f_pos); - case 2: - return(-EINVAL); - default: - return(-EINVAL); - } -} - -/* - * Overrides for Emacs so that we almost follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-indent-level: 4 - * c-brace-imaginary-offset: 0 - * c-brace-offset: -4 - * c-argdecl-indent: 4 - * c-label-offset: -4 - * c-continued-statement-offset: 4 - * c-continued-brace-offset: 0 - * indent-tabs-mode: nil - * tab-width: 8 - * End: - */ |