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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [fs/] [autofs4/] [inode.c] - Blame information for rev 1765

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/* -*- c -*- --------------------------------------------------------------- *
 *
 * linux/fs/autofs/inode.c
 *
 *  Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved
 *
 * This file is part of the Linux kernel and is made available under
 * the terms of the GNU General Public License, version 2, or at your
 * option, any later version, incorporated herein by reference.
 *
 * ------------------------------------------------------------------------- */
 
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/file.h>
#include <linux/locks.h>
#include <asm/bitops.h>
#include "autofs_i.h"
#define __NO_VERSION__
#include <linux/module.h>
 
static void ino_lnkfree(struct autofs_info *ino)
{
        if (ino->u.symlink) {
                kfree(ino->u.symlink);
                ino->u.symlink = NULL;
        }
}
 
struct autofs_info *autofs4_init_ino(struct autofs_info *ino,
                                     struct autofs_sb_info *sbi, mode_t mode)
{
        int reinit = 1;
 
        if (ino == NULL) {
                reinit = 0;
                ino = kmalloc(sizeof(*ino), GFP_KERNEL);
        }
 
        if (ino == NULL)
                return NULL;
 
        ino->flags = 0;
        ino->mode = mode;
        ino->inode = NULL;
        ino->dentry = NULL;
        ino->size = 0;
 
        ino->last_used = jiffies;
 
        ino->sbi = sbi;
 
        if (reinit && ino->free)
                (ino->free)(ino);
 
        memset(&ino->u, 0, sizeof(ino->u));
 
        ino->free = NULL;
 
        if (S_ISLNK(mode))
                ino->free = ino_lnkfree;
 
        return ino;
}
 
void autofs4_free_ino(struct autofs_info *ino)
{
        if (ino->dentry) {
                ino->dentry->d_fsdata = NULL;
                if (ino->dentry->d_inode)
                        dput(ino->dentry);
                ino->dentry = NULL;
        }
        if (ino->free)
                (ino->free)(ino);
        kfree(ino);
}
 
static void autofs4_put_super(struct super_block *sb)
{
        struct autofs_sb_info *sbi = autofs4_sbi(sb);
 
        sb->u.generic_sbp = NULL;
 
        if ( !sbi->catatonic )
                autofs4_catatonic_mode(sbi); /* Free wait queues, close pipe */
 
        kfree(sbi);
 
        DPRINTK(("autofs: shutting down\n"));
}
 
static int autofs4_statfs(struct super_block *sb, struct statfs *buf);
 
static struct super_operations autofs4_sops = {
        put_super:      autofs4_put_super,
        statfs:         autofs4_statfs,
};
 
static int parse_options(char *options, int *pipefd, uid_t *uid, gid_t *gid,
                         pid_t *pgrp, int *minproto, int *maxproto)
{
        char *this_char, *value;
 
        *uid = current->uid;
        *gid = current->gid;
        *pgrp = current->pgrp;
 
        *minproto = AUTOFS_MIN_PROTO_VERSION;
        *maxproto = AUTOFS_MAX_PROTO_VERSION;
 
        *pipefd = -1;
 
        if ( !options ) return 1;
        for (this_char = strtok(options,","); this_char; this_char = strtok(NULL,",")) {
                if ((value = strchr(this_char,'=')) != NULL)
                        *value++ = 0;
                if (!strcmp(this_char,"fd")) {
                        if (!value || !*value)
                                return 1;
                        *pipefd = simple_strtoul(value,&value,0);
                        if (*value)
                                return 1;
                }
                else if (!strcmp(this_char,"uid")) {
                        if (!value || !*value)
                                return 1;
                        *uid = simple_strtoul(value,&value,0);
                        if (*value)
                                return 1;
                }
                else if (!strcmp(this_char,"gid")) {
                        if (!value || !*value)
                                return 1;
                        *gid = simple_strtoul(value,&value,0);
                        if (*value)
                                return 1;
                }
                else if (!strcmp(this_char,"pgrp")) {
                        if (!value || !*value)
                                return 1;
                        *pgrp = simple_strtoul(value,&value,0);
                        if (*value)
                                return 1;
                }
                else if (!strcmp(this_char,"minproto")) {
                        if (!value || !*value)
                                return 1;
                        *minproto = simple_strtoul(value,&value,0);
                        if (*value)
                                return 1;
                }
                else if (!strcmp(this_char,"maxproto")) {
                        if (!value || !*value)
                                return 1;
                        *maxproto = simple_strtoul(value,&value,0);
                        if (*value)
                                return 1;
                }
                else break;
        }
        return (*pipefd < 0);
}
 
static struct autofs_info *autofs4_mkroot(struct autofs_sb_info *sbi)
{
        struct autofs_info *ino;
 
        ino = autofs4_init_ino(NULL, sbi, S_IFDIR | 0755);
        if (!ino)
                return NULL;
 
        return ino;
}
 
struct super_block *autofs4_read_super(struct super_block *s, void *data,
                                      int silent)
{
        struct inode * root_inode;
        struct dentry * root;
        struct file * pipe;
        int pipefd;
        struct autofs_sb_info *sbi;
        int minproto, maxproto;
 
        sbi = (struct autofs_sb_info *) kmalloc(sizeof(*sbi), GFP_KERNEL);
        if ( !sbi )
                goto fail_unlock;
        DPRINTK(("autofs: starting up, sbi = %p\n",sbi));
 
        memset(sbi, 0, sizeof(*sbi));
 
        s->u.generic_sbp = sbi;
        sbi->magic = AUTOFS_SBI_MAGIC;
        sbi->catatonic = 0;
        sbi->exp_timeout = 0;
        sbi->oz_pgrp = current->pgrp;
        sbi->sb = s;
        sbi->version = 0;
        sbi->queues = NULL;
        s->s_blocksize = 1024;
        s->s_blocksize_bits = 10;
        s->s_magic = AUTOFS_SUPER_MAGIC;
        s->s_op = &autofs4_sops;
 
        /*
         * Get the root inode and dentry, but defer checking for errors.
         */
        root_inode = autofs4_get_inode(s, autofs4_mkroot(sbi));
        root_inode->i_op = &autofs4_root_inode_operations;
        root_inode->i_fop = &autofs4_root_operations;
        root = d_alloc_root(root_inode);
        pipe = NULL;
 
        if (!root)
                goto fail_iput;
 
        /* Can this call block? */
        if (parse_options(data, &pipefd,
                          &root_inode->i_uid, &root_inode->i_gid,
                          &sbi->oz_pgrp,
                          &minproto, &maxproto)) {
                printk("autofs: called with bogus options\n");
                goto fail_dput;
        }
 
        /* Couldn't this be tested earlier? */
        if (maxproto < AUTOFS_MIN_PROTO_VERSION ||
            minproto > AUTOFS_MAX_PROTO_VERSION) {
                printk("autofs: kernel does not match daemon version "
                       "daemon (%d, %d) kernel (%d, %d)\n",
                        minproto, maxproto,
                        AUTOFS_MIN_PROTO_VERSION, AUTOFS_MAX_PROTO_VERSION);
                goto fail_dput;
        }
 
        sbi->version = maxproto > AUTOFS_MAX_PROTO_VERSION ? AUTOFS_MAX_PROTO_VERSION : maxproto;
 
        DPRINTK(("autofs: pipe fd = %d, pgrp = %u\n", pipefd, sbi->oz_pgrp));
        pipe = fget(pipefd);
 
        if ( !pipe ) {
                printk("autofs: could not open pipe file descriptor\n");
                goto fail_dput;
        }
        if ( !pipe->f_op || !pipe->f_op->write )
                goto fail_fput;
        sbi->pipe = pipe;
 
        /*
         * Success! Install the root dentry now to indicate completion.
         */
        s->s_root = root;
        return s;
 
        /*
         * Failure ... clean up.
         */
fail_fput:
        printk("autofs: pipe file descriptor does not contain proper ops\n");
        /*
         * fput() can block, so we clear the super block first.
         */
        fput(pipe);
        /* fall through */
fail_dput:
        /*
         * dput() can block, so we clear the super block first.
         */
        dput(root);
        goto fail_free;
fail_iput:
        printk("autofs: get root dentry failed\n");
        /*
         * iput() can block, so we clear the super block first.
         */
        iput(root_inode);
fail_free:
        kfree(sbi);
fail_unlock:
        return NULL;
}
 
static int autofs4_statfs(struct super_block *sb, struct statfs *buf)
{
        buf->f_type = AUTOFS_SUPER_MAGIC;
        buf->f_bsize = 1024;
        buf->f_namelen = NAME_MAX;
        return 0;
}
 
struct inode *autofs4_get_inode(struct super_block *sb,
                                struct autofs_info *inf)
{
        struct inode *inode = new_inode(sb);
 
        if (inode == NULL)
                return NULL;
 
        inf->inode = inode;
        inode->i_mode = inf->mode;
        if (sb->s_root) {
                inode->i_uid = sb->s_root->d_inode->i_uid;
                inode->i_gid = sb->s_root->d_inode->i_gid;
        } else {
                inode->i_uid = 0;
                inode->i_gid = 0;
        }
        inode->i_blksize = PAGE_CACHE_SIZE;
        inode->i_blocks = 0;
        inode->i_rdev = 0;
        inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
 
        if (S_ISDIR(inf->mode)) {
                inode->i_nlink = 2;
                inode->i_op = &autofs4_dir_inode_operations;
                inode->i_fop = &dcache_dir_ops;
        } else if (S_ISLNK(inf->mode)) {
                inode->i_size = inf->size;
                inode->i_op = &autofs4_symlink_inode_operations;
        }
 
        return inode;
}

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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [fs/] [autofs4/] [inode.c] - Blame information for rev 1765

Line No.	Rev	Author	Line
1	1275	phoenix	`/* -- c -- --------------------------------------------------------------- *`
2			`*`
3			`* linux/fs/autofs/inode.c`
4			`*`
5			`* Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved`
6			`*`
7			`* This file is part of the Linux kernel and is made available under`
8			`* the terms of the GNU General Public License, version 2, or at your`
9			`* option, any later version, incorporated herein by reference.`
10			`*`
11			`* ------------------------------------------------------------------------- */`
12
13			`#include <linux/kernel.h>`
14			`#include <linux/slab.h>`
15			`#include <linux/file.h>`
16			`#include <linux/locks.h>`
17			`#include <asm/bitops.h>`
18			`#include "autofs_i.h"`
19			`#define __NO_VERSION__`
20			`#include <linux/module.h>`
21
22			`static void ino_lnkfree(struct autofs_info *ino)`
23			`{`
24			`if (ino->u.symlink) {`
25			`kfree(ino->u.symlink);`
26			`ino->u.symlink = NULL;`
27			`}`
28			`}`
29
30			`struct autofs_info autofs4_init_ino(struct autofs_info ino,`
31			`struct autofs_sb_info *sbi, mode_t mode)`
32			`{`
33			`int reinit = 1;`
34
35			`if (ino == NULL) {`
36			`reinit = 0;`
37			`ino = kmalloc(sizeof(*ino), GFP_KERNEL);`
38			`}`
39
40			`if (ino == NULL)`
41			`return NULL;`
42
43			`ino->flags = 0;`
44			`ino->mode = mode;`
45			`ino->inode = NULL;`
46			`ino->dentry = NULL;`
47			`ino->size = 0;`
48
49			`ino->last_used = jiffies;`
50
51			`ino->sbi = sbi;`
52
53			`if (reinit && ino->free)`
54			`(ino->free)(ino);`
55
56			`memset(&ino->u, 0, sizeof(ino->u));`
57
58			`ino->free = NULL;`
59
60			`if (S_ISLNK(mode))`
61			`ino->free = ino_lnkfree;`
62
63			`return ino;`
64			`}`
65
66			`void autofs4_free_ino(struct autofs_info *ino)`
67			`{`
68			`if (ino->dentry) {`
69			`ino->dentry->d_fsdata = NULL;`
70			`if (ino->dentry->d_inode)`
71			`dput(ino->dentry);`
72			`ino->dentry = NULL;`
73			`}`
74			`if (ino->free)`
75			`(ino->free)(ino);`
76			`kfree(ino);`
77			`}`
78
79			`static void autofs4_put_super(struct super_block *sb)`
80			`{`
81			`struct autofs_sb_info *sbi = autofs4_sbi(sb);`
82
83			`sb->u.generic_sbp = NULL;`
84
85			`if ( !sbi->catatonic )`
86			`autofs4_catatonic_mode(sbi); /* Free wait queues, close pipe */`
87
88			`kfree(sbi);`
89
90			`DPRINTK(("autofs: shutting down\n"));`
91			`}`
92
93			`static int autofs4_statfs(struct super_block sb, struct statfs buf);`
94
95			`static struct super_operations autofs4_sops = {`
96			`put_super: autofs4_put_super,`
97			`statfs: autofs4_statfs,`
98			`};`
99
100			`static int parse_options(char options, int pipefd, uid_t uid, gid_t gid,`
101			`pid_t pgrp, int minproto, int *maxproto)`
102			`{`
103			`char this_char, value;`
104
105			`*uid = current->uid;`
106			`*gid = current->gid;`
107			`*pgrp = current->pgrp;`
108
109			`*minproto = AUTOFS_MIN_PROTO_VERSION;`
110			`*maxproto = AUTOFS_MAX_PROTO_VERSION;`
111
112			`*pipefd = -1;`
113
114			`if ( !options ) return 1;`
115			`for (this_char = strtok(options,","); this_char; this_char = strtok(NULL,",")) {`
116			`if ((value = strchr(this_char,'=')) != NULL)`
117			`*value++ = 0;`
118			`if (!strcmp(this_char,"fd")) {`
119			`if (!value \|\| !*value)`
120			`return 1;`
121			`*pipefd = simple_strtoul(value,&value,0);`
122			`if (*value)`
123			`return 1;`
124			`}`
125			`else if (!strcmp(this_char,"uid")) {`
126			`if (!value \|\| !*value)`
127			`return 1;`
128			`*uid = simple_strtoul(value,&value,0);`
129			`if (*value)`
130			`return 1;`
131			`}`
132			`else if (!strcmp(this_char,"gid")) {`
133			`if (!value \|\| !*value)`
134			`return 1;`
135			`*gid = simple_strtoul(value,&value,0);`
136			`if (*value)`
137			`return 1;`
138			`}`
139			`else if (!strcmp(this_char,"pgrp")) {`
140			`if (!value \|\| !*value)`
141			`return 1;`
142			`*pgrp = simple_strtoul(value,&value,0);`
143			`if (*value)`
144			`return 1;`
145			`}`
146			`else if (!strcmp(this_char,"minproto")) {`
147			`if (!value \|\| !*value)`
148			`return 1;`
149			`*minproto = simple_strtoul(value,&value,0);`
150			`if (*value)`
151			`return 1;`
152			`}`
153			`else if (!strcmp(this_char,"maxproto")) {`
154			`if (!value \|\| !*value)`
155			`return 1;`
156			`*maxproto = simple_strtoul(value,&value,0);`
157			`if (*value)`
158			`return 1;`
159			`}`
160			`else break;`
161			`}`
162			`return (*pipefd < 0);`
163			`}`
164
165			`static struct autofs_info autofs4_mkroot(struct autofs_sb_info sbi)`
166			`{`
167			`struct autofs_info *ino;`
168
169			`ino = autofs4_init_ino(NULL, sbi, S_IFDIR \| 0755);`
170			`if (!ino)`
171			`return NULL;`
172
173			`return ino;`
174			`}`
175
176			`struct super_block autofs4_read_super(struct super_block s, void *data,`
177			`int silent)`
178			`{`
179			`struct inode * root_inode;`
180			`struct dentry * root;`
181			`struct file * pipe;`
182			`int pipefd;`
183			`struct autofs_sb_info *sbi;`
184			`int minproto, maxproto;`
185
186			`sbi = (struct autofs_sb_info ) kmalloc(sizeof(sbi), GFP_KERNEL);`
187			`if ( !sbi )`
188			`goto fail_unlock;`
189			`DPRINTK(("autofs: starting up, sbi = %p\n",sbi));`
190
191			`memset(sbi, 0, sizeof(*sbi));`
192
193			`s->u.generic_sbp = sbi;`
194			`sbi->magic = AUTOFS_SBI_MAGIC;`
195			`sbi->catatonic = 0;`
196			`sbi->exp_timeout = 0;`
197			`sbi->oz_pgrp = current->pgrp;`
198			`sbi->sb = s;`
199			`sbi->version = 0;`
200			`sbi->queues = NULL;`
201			`s->s_blocksize = 1024;`
202			`s->s_blocksize_bits = 10;`
203			`s->s_magic = AUTOFS_SUPER_MAGIC;`
204			`s->s_op = &autofs4_sops;`
205
206			`/*`
207			`* Get the root inode and dentry, but defer checking for errors.`
208			`*/`
209			`root_inode = autofs4_get_inode(s, autofs4_mkroot(sbi));`
210			`root_inode->i_op = &autofs4_root_inode_operations;`
211			`root_inode->i_fop = &autofs4_root_operations;`
212			`root = d_alloc_root(root_inode);`
213			`pipe = NULL;`
214
215			`if (!root)`
216			`goto fail_iput;`
217
218			`/* Can this call block? */`
219			`if (parse_options(data, &pipefd,`
220			`&root_inode->i_uid, &root_inode->i_gid,`
221			`&sbi->oz_pgrp,`
222			`&minproto, &maxproto)) {`
223			`printk("autofs: called with bogus options\n");`
224			`goto fail_dput;`
225			`}`
226
227			`/* Couldn't this be tested earlier? */`
228			`if (maxproto < AUTOFS_MIN_PROTO_VERSION \|\|`
229			`minproto > AUTOFS_MAX_PROTO_VERSION) {`
230			`printk("autofs: kernel does not match daemon version "`
231			`"daemon (%d, %d) kernel (%d, %d)\n",`
232			`minproto, maxproto,`
233			`AUTOFS_MIN_PROTO_VERSION, AUTOFS_MAX_PROTO_VERSION);`
234			`goto fail_dput;`
235			`}`
236
237			`sbi->version = maxproto > AUTOFS_MAX_PROTO_VERSION ? AUTOFS_MAX_PROTO_VERSION : maxproto;`
238
239			`DPRINTK(("autofs: pipe fd = %d, pgrp = %u\n", pipefd, sbi->oz_pgrp));`
240			`pipe = fget(pipefd);`
241
242			`if ( !pipe ) {`
243			`printk("autofs: could not open pipe file descriptor\n");`
244			`goto fail_dput;`
245			`}`
246			`if ( !pipe->f_op \|\| !pipe->f_op->write )`
247			`goto fail_fput;`
248			`sbi->pipe = pipe;`
249
250			`/*`
251			`* Success! Install the root dentry now to indicate completion.`
252			`*/`
253			`s->s_root = root;`
254			`return s;`
255
256			`/*`
257			`* Failure ... clean up.`
258			`*/`
259			`fail_fput:`
260			`printk("autofs: pipe file descriptor does not contain proper ops\n");`
261			`/*`
262			`* fput() can block, so we clear the super block first.`
263			`*/`
264			`fput(pipe);`
265			`/* fall through */`
266			`fail_dput:`
267			`/*`
268			`* dput() can block, so we clear the super block first.`
269			`*/`
270			`dput(root);`
271			`goto fail_free;`
272			`fail_iput:`
273			`printk("autofs: get root dentry failed\n");`
274			`/*`
275			`* iput() can block, so we clear the super block first.`
276			`*/`
277			`iput(root_inode);`
278			`fail_free:`
279			`kfree(sbi);`
280			`fail_unlock:`
281			`return NULL;`
282			`}`
283
284			`static int autofs4_statfs(struct super_block sb, struct statfs buf)`
285			`{`
286			`buf->f_type = AUTOFS_SUPER_MAGIC;`
287			`buf->f_bsize = 1024;`
288			`buf->f_namelen = NAME_MAX;`
289			`return 0;`
290			`}`
291
292			`struct inode autofs4_get_inode(struct super_block sb,`
293			`struct autofs_info *inf)`
294			`{`
295			`struct inode *inode = new_inode(sb);`
296
297			`if (inode == NULL)`
298			`return NULL;`
299
300			`inf->inode = inode;`
301			`inode->i_mode = inf->mode;`
302			`if (sb->s_root) {`
303			`inode->i_uid = sb->s_root->d_inode->i_uid;`
304			`inode->i_gid = sb->s_root->d_inode->i_gid;`
305			`} else {`
306			`inode->i_uid = 0;`
307			`inode->i_gid = 0;`
308			`}`
309			`inode->i_blksize = PAGE_CACHE_SIZE;`
310			`inode->i_blocks = 0;`
311			`inode->i_rdev = 0;`
312			`inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;`
313
314			`if (S_ISDIR(inf->mode)) {`
315			`inode->i_nlink = 2;`
316			`inode->i_op = &autofs4_dir_inode_operations;`
317			`inode->i_fop = &dcache_dir_ops;`
318			`} else if (S_ISLNK(inf->mode)) {`
319			`inode->i_size = inf->size;`
320			`inode->i_op = &autofs4_symlink_inode_operations;`
321			`}`
322
323			`return inode;`
324			`}`